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A currency according to wikipedia comes from the latin word, “currens” which means “in circulation” in English. In the most specific word currency means money in any form when in actual use or in circulation as means of exchange. Throughout the ages there has been all kinds of things used as medium of exchange.
Before money was used, people used barter which is a system where people exchanged goods and/or services they had with the goods or services that they needed/wanted. Now because of barter’s inefficiencies, the idea of a standard medium of exchange began to emerge. Cowry shells, grains, metals, etc., began to be used as currency. Metals like gold and silver eventually emerged because of their durability but one of the flaws was the safety of storage especially when travelling from one location to the other. There were criminals and bandits that robbed people of their precious metals.
Eventually receipts of the amount of metals that were deposited with a third party began to be used as an exchange. These receipts represented the amount of these precious metals that was kept by wholesaler shops. Since people did not have to carry the actual metals, this was a lot safer means to transact. People will exchange these receipts for goods and services and they will be able to be turned in for the metals. Eventually these turned to promissory notes or bank notes. These bank notes were guaranteed by the deposits of the precious metals. These wholesalers that kept these deposits suddenly realized that as long as everyone did not claim the metals at the same time, they could issue more of these promissory/bank notes. This was how the fractional reserve system of banking got invented though that was not what it was called at the time. Eventually when people realized that there were more of these notes showing up, this led to the inflation or devaluing of these promissory/bank notes. Most people demanded their metals and the last people to figure out this Ponzi scheme were left holding the bag or you will say the bag of “worthless promissory/bank notes.”
Centralized government bodies called central banks adopted this same system. At first, this was backed by gold since this was the most stable means of exchange for most metals. As time progressed, the backing of the paper money, restricted how much money these central banks could print and eventually all currencies were backed by nothing except the government and mostly by decree or force. This was how fiat came to play.
Fast forward to this day and there have been so many currency crises caused by the non-stop printing of money. The United States has been the worst of this printing though every nation has participated in this scheme. Since the dollar is the world reserve currency, it has been spared from kind of inflation that has happened in countries like Zimbabwe and presently Venezuela, where the inflation rate runs in the millions of percentages.
Anyway, a guy or group of people saw how the printing of money was happening in the last 2008 global recession and the Bitcoin white paper was released where people can be able to exchange value without third parties or governmental bodies. This was groundbreaking! In the genesis transaction of the guy or group of people called Satoshi Nakamoto, was embedded, “The Times 03/Jan/2009 Chancellor on brink of second bailout for banks.” This message was the reason of the creation of Bitcoin. Initially, this was accepted by geeks and people that were involved in the dark web but this eventually went main stream.
The demand for this new form of money grew so much that scaling this currency became contentious and eventually led to many forks of the Bitcoin code since it was open source and anybody can use the source code to spin off a fork of the code. One of the things that also came up with this demand was the amount of fees for the transactions. Initially Satoshi’s vision was for this new form of money to be electronic cash so that people could transact with very low fees with good speed and without any barriers. At the height of the cryptocurrency bubble, fees were outrageous and transactions took days to happen. Personally, at that period, I converted my Bitcoin to Ethereum or Litecoin and then sent my transactions because of the ethereaum transaction fees were lower. Eventually the Ethereum fees skyrocketed because of this new app called cryptokitties that congested the network. I stopped using Ethereum and only used Litecoin for most of my transactions.
Block One, the creators of EOSIO sofware already saw this and envisioned free and fast transactions and started the creation of the EOSIO software months before this big bubble. When the blockchain went live, the free and fast transactions took effect but people that did not hold their private keys quickly found out that they had to pay to get EOS accounts and there were other issues but the free and fast transactions is still the greatest aspect of EOS today. Some guys that helped launch EOS decided to fork the EOSIO software and put certain things in place to deal with some of the issues and came up with Telos. One of those things will be providing free Telos accounts.
When the Telos network goes live, anybody will be able to get free accounts and also be able to have fast and free transactions just as if you were transacting with physical cash to anybody. Think about it; when you are giving physical cash to anybody, do you have to pay any fees for that transaction? No! This is what Telos will be. A form of currency just like physical cash but using the power of cryptography and the blockchain. I am pretty excited in the future of this new form of money!
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Follow me on Steemit. https://steemit.com/@financlfreedomcj
Join the Telos conversation and get more info!
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Kickoff Workshop "Seismology and Artificial Intelligence"
The Kickoff SAI workshop funded by the Federal Ministry of Education and Research (Bundesministerium für Bildung und Forschung - BMBF) is being organised as an online/offline hybrid event from 27th September to 1st October 2021. This event focuses on exploring the application of Deep Learning/Machine Learning in Seismology. The complex nature of seismic events makes it particularly challenging to efficiently extract information from the seismic data by just using the classical statistical tools. The cutting-edge research in Deep Learning/Machine learning is already providing powerful tools in handling massive data and in extracting desired features e.g., Seismic Phase Picking, Magnitude and Peak ground Acceleration estimation, Seismic Event detection, and so on.
This five-day event will bring together experts from Artificial Intelligence and various domains of Earth Sciences to not only explore the numerous computational solutions which AI is offering but also to envision the future direction where the research is headed. Each day has a different theme to focus on.
Seismic Waveform Analysis
Geodetic and Remote Sensing Data Analysis
Seismic Hazard Modelling
You can download the detailed program with all abstracts here:
Earth's Variable Rotation and its Influence on Decadal Fluctuations in Global Earthquake Productivity
From 1900 to the present, the rate of occurrence of major earthquakes (those exceeding Magnitude 7) has varied from less than ten to more than twenty per year. Maxima and minima in this annual rate fluctuate with a period of 25±10 years, similar to long-period changes in the rotation rate of the earth as revealed by the length of the day (LoD). Intriguingly, maximum decelerations in Earth's rotation rate correspond to maxima in global earthquake productivity delayed by roughly 5 years. Serendipitously, this implies that future global earthquake productivity can be forecast from LoD data. A forecast in 2018 of 15±2.7 earthquakes in 2020±2.5, for example, is currently within its forecast uncertainty. The reason for this curious relationship is obscure. Few atmospheric or oceanic signals have sufficiently long period to influence Earth's rotation rate at decadal periods. In contrast changes in the relative rotation rate between the lithosphere and the solid core of the Earth are known to occur at these long periods. Two causal mechanisms are discussed whereby fluctuations in global angular velocity may influence the lithosphere: one dynamic and the other kinematic. The first results in lithospheric overshoot during deceleration, and the second results in changes in the equatorial circumference of the Earth. Both effects decrease with increasing latitude, but since neither mechanism results in plate boundary stresses sufficiently large to significantly advance the timing of earthquakes, it is necessary, in addition to invoke synchronization theory to explain the observed correlation between LoD and earthquake productivity.
Prof. Roger Bilham
CIRES and Geological Science
University of Colorado, Boulder CO 80309 USA
To register for the event, please send an email containing the following information to Nishtha Srivastava:
- Position and Affiliation
- Abstract (if you want to give a talk)
- signed declaration of consent (download here)
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read wav file, calculation fo duration / data_size always wrong
i am trying to read a wav file generated by ffmpeg with
ffmpeg -i av
FFmpeg generates a wav file with a header size of 18 but without any extension data.
This are my data structures:
struct wav_header {
uint32_t chunk_id;
uint32_t chunk_data_size;
uint32_t riff_type;
uint32_t fmt;
uint32_t fmt_chunk_size;
uint16_t format_tag;
uint16_t channels;
uint32_t samples_per_second;
uint32_t bytes_per_second;
uint16_t block_align; /* 1 => 8-bit mono, 2 => 8-bit stereo or 16-bit mono, 4 => 16-bit stereo */
uint16_t bits_per_sample;
};
struct fact_header {
uint32_t chunk_id;
uint32_t chunk_data_size;
uint32_t sample_length;
};
struct data_header {
uint32_t id;
uint32_t size;
};
If i read them out i get the following results of my wav file:
chunk_data_size: 40836134
ftm_chunk_size: 18
channels: 2
samples_per_second (samplerate): 48000
bytes_per_second: 192000
block_align: 4
bits_per_sample: 16
data_id: 61746164 -> 'data' OK
data_size: 40836096
I try now to calculate the length in seconds by using the formula
data_size / bytes_per_second
and get the following output:
length_in_seconds:<PHONE_NUMBER>4
length_in_minutes: 3.54480004 (length_in_seconds / 60)
But when i open my file in itunes i get a length of 3:31. I also tried it with other sound files and i am always a little bit too far.
What i also tried was, to hexdump my wav file. The hexdump showed less output than if i do a
for (i < data_size; i += 2) printf("%02x", data[i])
so i am somehow reading too far?
I searched the whole internet about formulas but im kinda stuck because I always come to the same results.
http://www-mmsp.ece.mcgill.ca/documents/audioformats/wave/wave.html
you can read the following statement:
"WAVE files often have information chunks that precede or follow the sound data (Data chunk). Some programs (naively) assume that for PCM data, the file header is exactly 44 bytes long and that the rest of the file contains sound data. This is not a safe assumption."
This is probably what i am doing wrong. But how can i get then the right sound_chuck_data_size?
EDIT
lile gcb pointed out below everything is alright. The solution was that the time was stored in decimal time and i had to convert it to regular time :-) this is what i came up with and it works fine:
track.duration_dec = (float)data.size / (header.bytes_per_second * 60);
track.duration_time = convert_time(track.duration_dec);
static double convert_time(double input) {
double integral;
double frac;
char buffer[48];
frac = modf(input, &integral);
sprintf(buffer, "%d.%1.f", (int)integral, frac*60);
return atof(buffer);
}
Regarding the length in minutes, remember that you are showing a decimal number, so that 0.5 minutes is half a minute (i.e. 30 seconds).
What is the size of your wav file on filesystem?
It sounds ok to me. So your song is 3.54480004. As already stated, this is in decimal. So you have 3 minutes and then 0.54480004 * 60 which is 33.28 seconds. So I'd say 3.33 minutes long
No worries I did exactly the same thing before!
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Eximiousfiction Let Me Game in Peace update – Chapter 1096 – What’s Going On? melt abortive recommendation-p1
Wonderfulfiction Let Me Game in Peace novel – Chapter 1096 – What’s Going On? afternoon easy reading-p1
Novel–Let Me Game in Peace–Let Me Game in Peace
Chapter 1096 – What’s Going On? curly festive
Inside the Darkness Website, Zhou Wen walked towards Darkness Sector Devil. Before long, he emerged looking at it.
Viewing Zhou Wen standing up there perfectly great with virtually no accidents, they couldn’t support but heave a sigh of remedy.
The suggestion of the dragon teeth was approximately to feel the eyeball of Darkness Domain name Devil whenever a palm suddenly extended away from the darkness and grabbed the dragon tooth.
Darkness Domain name Devil’s impulse have also been extremely quick. It reached over to grind Zhou Wen, but when its other eyes spotted Demonic Neonate, its hands froze as the eyes ended up filled with disbelief.
the thirteen treasures michelle harrison
“You remain too young to play soiled ahead of me.” Darkness Domain Devil grinned hideously. It grabbed the Dragon Teeth with one palm and grabbed Zhou Wen’s body with all the other. Simultaneously, it stated, “It’s not surprising you dare be so arrogant. You really have a Terror piece. This isn’t an issue that any Terror creature can condense… Ah…”
“You continue to be too young to play messy before me.” Darkness Area Devil grinned hideously. It grabbed the Dragon Tooth with one palm and grabbed Zhou Wen’s system using the other. Simultaneously, it mentioned, “It’s not surprising you dare be so arrogant. You actually possess a Terror object. This isn’t something which any Terror creature can condense… Ah…”
“Wasn’t it summoned by Zhou Ming? Is not it a Terror creature coming from the sizing?”
“What are you presently status there for? Rapidly accomplish him out!” Zhou Ming was immediately let down as he spotted that Zhou Wen wasn’t dead. He immediately urged Darkness Sector Devil to swiftly wipe out Zhou Wen.
If Demonic Neonate really was connected with the dimension, who recognized what can transpire in case the massive shots on the measurement observed him making use of Demonic Neonate from the area.
Stranded in Arcady
Nonetheless, Darkness Website Devil was diverse. It absolutely was a being from your sizing. It actually known Demonic Neonate and looking at the alarmed seem, this is an enormous dilemma.
Four Famous American Writers: Washington Irving, Edgar Allan Poe, James Russell Lowell, Bayard Taylor
This was for the reason that dimensional critters he had enter in to experience of experienced shared with him that Darkness Website Devil was invincible among Terror-grade existences. So long as he summoned it through, there is absolutely no way for him to lose.
After all, that was a overcome field where one could acknowledge conquer. Zhou Wen wasn’t certain that he could destroy Darkness Area Devil prior to it confessed conquer.
If Demonic Neonate was really relevant to the dimension, who recognized what could transpire in case the huge photographs with the sizing observed him using Demonic Neonate within the world.
“You are too youthful to try out grubby in front of me.” Darkness Domain Devil grinned hideously. It grabbed the Dragon Teeth with one palm and grabbed Zhou Wen’s human body while using other. At the same time, it explained, “It’s not surprising you dare be so conceited. You actually have a very Terror object. This is not something that any Terror being can condense… Ah…”
Immediately, the Federation is in an uproar. It manufactured good sense if Harsh Demon obtained something related to Human being, but Darkness Domain Devil had been a dimensional being summoned by Zhou Ming. Why made it happen kneel right after the tv screen switched black color and illuminated up?
Equally as Zhou Wen was hesitating and everybody was puzzled, Darkness Website Devil instantly got a step forward and genuflected. Much like Grim Demon from right before, it placed its right-hand on its torso and decreased its head.
Demonic Neonate immediately retreated following a thriving affect and landed in Zhou Wen’s biceps and triceps.
“Little Yanyan, crunch me. Determine if I’m still dreaming?” Li Xuan thought to Feng Qiuyan having a strange term.
Connie Morgan in the Fur Country
Only then does all people note that the true body system of the Darkness Domain name Devil wasn’t as big since they got dreamed of. It was no more than ten yards extra tall, but it surely was already very grand in comparison with mankind.
Darkness Domain name Devil evidently understood Demonic Neonate, or fairly, it got seen an living much like Demonic Neonate.
Only Zhou Wen believed that Darkness Sector Devil was kneeling to Demonic Neonate, not him.
Abruptly, the darkness within the industry vanished. Not only have the darkness disappear, but also the dark fuel around the Darkness Sector Devil vanished.
Just like Zhou Wen was hesitating and everyone was confused, Darkness Area Devil suddenly had taken one step forward and genuflected. Similar to Harsh Demon from right before, it placed its right-hand on its chest and minimized its go.
Only then did everybody see that the actual body in the Darkness Domain name Devil wasn’t as massive since they had dreamed. It was subsequently only about ten meters high, however it was already very spectacular in comparison with men and women.
On the other hand, right before Zhou Wen might take action, he observed Darkness Area Devil suddenly retract its Darkness Domain name. Perhaps the Darkness aura on its physique completely converged, exposing it is true body system.
Seeing that Darkness Sector Devil was unharmed, everyone was alarmed. They hurriedly searched the other one corners from the industry, nervous that Zhou Wen has been killed.
The suggestion in the dragon teeth was approximately to impression the eyeball of Darkness Site Devil whenever a palm suddenly extended away from the darkness and grabbed the dragon teeth.
Zhou Wen found that some thing was amiss along with a negative feeling. He immediately unsummoned Demonic Neonate.
In the Darkness Domain name, Zhou Wen walked towards Darkness Domain Devil. In the near future, he appeared facing it.
the forest runners
In past times, the point that Harsh Demon knew Demonic Neonate experienced produced Zhou Wen believe a little something was amiss. Harsh Demon was ultimately a Guardian given birth to in the world.
Demonic Neonate immediately retreated after a productive reach and landed in Zhou Wen’s biceps and triceps.
Of course, this became a combat industry where you can accept overcome. Zhou Wen wasn’t confident that he could destroy Darkness Site Devil right before it accepted overcome.
love never dies quotes
Darkness Sector Devil’s result had also been extremely rapid. It hit out to grind Zhou Wen, however, when its other vision noticed Demonic Neonate, its fingers froze as the vision were filled with disbelief.
In the past, the belief that Harsh Demon was aware Demonic Neonate possessed designed Zhou Wen believe a little something was amiss. Harsh Demon was ultimately a Guardian given birth to in the world.
Zhou Wen seen that a thing was amiss along with a poor feeling. He immediately unsummoned Demonic Neonate.
On top of that, without worrying about deal with from the Darkness Domain, if he wanted to kill it without needing Demonic Neonate, he would probably ought to reveal most of his proficiency.
Abruptly, the darkness on the world vanished. Not alone does the darkness disappear, but also the dark natural gas around the Darkness Site Devil vanished.
Moreover, minus the cover on the Darkness Site, if he desired to destroy it without having to use Demonic Neonate, he would probably ought to expose the vast majority of his expertise.
the romance of the colorado river basin
Seeing that Darkness Domain Devil was unharmed, everybody was alarmed. They hurriedly explored other edges of your world, worried that Zhou Wen has been destroyed.
Only Zhou Wen recognized that Darkness Domain name Devil was kneeling to Demonic Neonate, not him.
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BPT Impro GB/XQT904 Remote Control
Unfortunately, this product has either been discontinued, or we no longer stock it.
BPT branded 433.92 MHz dynamic code 4 button remote control.
Each of the 4 push buttons are used to transmit a different channel identification code together with the transmitter’s ID to the receiver. Requires GB/UHR903 receiver. Acts as a normal tag with Impro prox readers.
- Compact and smooth design
- Dynamic code transmission technology
- Can operate 4 seperate systems
- Button Mapping:
- When used with the Impro Quad Receiver and a single Impro (iTRT) Intelligent Twin Remote Terminal (XRT910-0-0-GB-XX, XRT920-0-0-GB- XX, IPS920-0-0-GB-XX or IPS921-0-0-GB-XX), two Push-buttons on the Impro (QT) Quad Transmitter are mapped. Use all four of the Impro (QT) Quad Transmitters Push-buttons, by connecting two Impro (iTRT) Intelligent Twin Remote Terminals (XRT910-0-0-GB-XX, XRT920-0-0-GB- XX, IPS920-0-0-GB-XX or IPS921-0-0-0GB-XX), to the Impro Quad Receiver. Refer to the Installation Manual for more information on this feature.
- With the Quad Receiver connected to FlexiScan Controller, the four buttons are each mapped to a corresponding relay.
- With the Quad Receiver connected to a UniScan Controller, all four buttons are mapped to a single relay.
- Transmits its own identity and each Push-button has a code identity
- The Receiver interfaces to access control systems, for example, IXP20, IXP220 or IXP300 and IXP400.
- Maximum reliable UHF transmitter range is between 20 and 50 m (22 and 55 yd), this is increased to between 50 and 100 m (55 and 109 yd) when used in direct line of sight with the Impro Quad Receiver (HRF900-0-1-GB-XX, HRF901-0-1-GB-XX)
- RF passive range of 12mm to 50mm (0.5in to 2in)
Physical and Performance Attributes
|Dimensions (L x W x H)||60 × 45 × 15 mm|
|Protection Rating (IP)||56|
|Number of Batteries||1|
Remote Control, Radio & Receiver Attributes
|Coding Type||Rolling / Hopping Code|
|Radio Frequency||433.92 MHz|
|Remote Body Colour||Blue|
|Remote Button Colour||Grey|
|Number of Buttons||4|
|Programming Methods||Program with receiver|
Up to 10m
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20 Most Recent
Questions & Answers
Belkin 7 port hub will not work with imac & leopard
Try any other power outlet source on the wall. Are you using the same adaptor to power up the new usb hub?
try the adaptor that came with the new usb hub. Most likely its the power source either the adaptor of the hub or usb hub or the wall power supply. Its strange that the new one is doing the same thing?
Let me know!
Usb hub unsafely unplugged from notebook. now
do one thing boot ur vista without usb hub then go to device manager remove your usb drivers of the hub disconnect the hub from computer, restart notebook, then connect the hub back when windows boot let vista to install the driver of that hub, after that connect your devices one by one ok let me know what happen? :-)
Does the F5U237 work with windows 10
Yes it will but you may need to make sure that you have the latest driver installed for it to work its best. If Windows 10 doesn't automatically install the latest driver, it can be obtained from www.belkin.com
Belkin F4U017 7 port USB
I just had the same problem and was able to figure our a permanent fix.Judging by the date of you post, I'm guessing you've already remedied this problem one way or another. But just in case you haven't or someone else is having the same problem, I'll go ahead and post what to do. First, make sure you leave the USB hub plugged in right now so that Device Manager lists what it thinks is the Bluetooth device. Go into Control Manager > Hardware & Sound > Device Manager. Right click on Bluetooth device that is showing up in error. From the dropdown box, select Properties. Click the Driver Tab. Click Uninstall. Check "Delete the driver software for this device." Click OK. Unplug your USB hub for a few seconds, then plug it back in. Windows should now recognize it as a "Generic USB hub." You should be good to go. Just remember not to install that update again or try to update the driver for the Generic USB hub. If you do, you'll end up with the same problem. I hope this helps someone out there.
Does the F5U237 work with windows 8.1
It looks like Belkin stop support on certain models of Belkin, even thou you don't state the version model. But if you have a chance, visit this microsoft website which explain that it's not compatible with Windows 8.1
I have an Belkin (F5U237) 7-Port USB Hub that is
if Win7-64 is installing this hub as a "Broadcom Bluetooth Device" or some such nonsense, heres a fix that has FINALLY worked for me...
START > CONTROL PANEL > HARDWARE AND SOUND > Device Manager.
Plug in your hub, and when it pops up under bluetooth radios with an error, right click, then select properties.
Under properties, select the DRIVER tab, then select UPDATE DRIVER.
It should prompt you to choose between "Search Automatically..." or "Browse my computer..."
Choose "Browse my computer for driver software."
It should bring up a location box to search, but there should be an option below the box that says "Let me pick from a list of device drivers on my computer."
Select this option.
This will bring up a list of drivers available.
UNCHECK the "Show compatible hardware" box!!!!!!!
Then browse until you see (Generic USB Hub). Select the first driver on this list and it will work.
The windows generic driver file that works with my hub is in:
If the above solution doesn't work, you can try to navigate to this specific driver file during a manual installation. Good luck.
F4U017 Belkin 7 port USB
Rimshot64, you did help someone out here. Two years later, even. And you succeeded where Microsoft "Help," per its tradition, failed. Thank you -- I got my scanner and printer, etc., back, and wasted only half a day uninstalling Microsoft updates (their suggestion).
Usb drive not recognised
First of all THe Belkin F5u237 is not a USB Drive. It is a USB Hub. If your running Windows XP it should see any device connected to the hub. If it dosen't see anything connected you may need to add the power supply to the hub.
Not finding what you are looking for?
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While the default logon screen for Windows certainly gets the job done, it leaves a little something to be desired when it comes to security. A locked system can still be shutdown or rebooted, and there’s no record of failed logon attempts. WinLockr is a Windows application that will enhance the lockscreen by adding some new functionality and security features.
What is it and what does it do
WinLockr is a free Windows application that enhances the lockscreen. It keeps track of any failed logon attempts including power state changes, which are directly prevented by the app (of course, it cannot protect from a power failure). It also blocks all input from key presses excluding those necessary to enter a logon password. Long story short, it’s a lot more secure than the stock Windows lockscreen.
- Replaces the stock Windows logon/lockscreen with one that has more security and that implements additional features
- You can enable a password unlock or a USB unlock, which unlocks the computer once a USB drive or device has been plugged in
- Is able to block shutdown/restart/log off, so people can’t circumvent the lock
- Is able to lock mouse/keyboard, only leaving the keys active that you need to enter your password
- Can create a lock shortcut which is placed on your desktop, on any other location, can be pinned to taskbar, etc. Running this shortcut enables WinLockr’s computer lock
- The default lockscreen just displays a status window and still shows the desktop, however you can activate a fullscreen lock if desired
- Requires very few system resources, at just 4MB of RAM usage
- VirusTotal returned 2/45 potentially harmful flags, “W32/GenBl.E432CE9E!Olympus” from Commtouch and “WS.Reputation.1” from Symantec. Additional scans with Microsoft Security Essentials and MalwareBytes Antimalware returned nothing. The flags are likely false positives due to the nature of the application, but proceed with caution.
- No way to use hotkeys to lock your computer nor is there an ability to automatically lock your computer after X seconds or minutes of idle time — you must manually run the lock shortcut or click the Lock Windows button every time you want to lock your computer with WinLockr
- Hasn’t since Feb 2012, meaning development is probably dead
WinLockr is a portable app, in that after you have downloaded the executable you can run it immediately. You do not need to install the application before using it. It works just fine when stored on an external USB drive.
As soon as you launch the application it will prompt for a new password. Then, it will prompt you to reenter your password to ensure it was correctly typed the first time. Since it’s the primary password used for the new logon features and lockscreen, it’s important that the password be remembered.
After you have entered the password you will be returned to the main interface for WinLockr. It’s remarkably simple and straightforward, considering each dialogue option needs little explanation.
One of the most interesting features is the option to install security measure on a USB drive. You can choose between either USB or password unlock methods. Essentially, with the USB unlock the computer remains locked until you plug in the affected drive or device. It’s pretty useful and efficient if you don’t want to bother with the traditional password entry measures.
Normally when locking the machine you can still see the desktop and any open windows are minimized. This is completely different than the Windows logon which masks the entire display with a new logon screen. However, you can enable a fullscreen lock feature which does the same as the stock logon if you’d much rather mask the system altogether.
After unlocking the computer the application will automatically shutdown. Every time you start it back up again, it will prompt you to enter your password- the same that you specified during the first run. If you need to, you can change the password at any time through the application interface with a related dialogue button.
WinLockr uses just over 4MB of RAM while running, so it’s relatively lightweight.
Conclusion and download link
WinLockr is a free and portable Windows application that replaces the stock lockscreen on Windows. More specifically, it implements several more advanced security measures than what Windows logon has. In addition to recording any failed logon attempts, it prevents the use of all keys that are not necessary in entering a password. For example, the print screen key doesn’t even work to take a screenshot while the system is locked.
By default, the lockscreen just displays a small status window and the rest of the system desktop is clearly visible. If you’re uncomfortable with that, you can always enable the fullscreen lock feature.
WinLockr uses very few system resources — just over 4MB of RAM is consumed while it’s running — and it is portable. If you’re looking for an alternative lockscreen solution, which records failed login attempts and has a small resource footprint, WinLockr is a good option.
Version reviewed: 1.3
Supported OS: Windows 8/7/Vista/XP
Download size: 363KB
VirusTotal malware scan results: 2/45
Is it portable? Yes
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package tracker
// validkeys contains a list of valid payload keys.
// this should be defined in a file later for more flexibility.
var validkeys = []string{
"id",
"subject",
"state",
"location",
}
// WCSPayload provides the most flexibility to arbitrarily inject key/value pairs
// which ultimately go into a nosql store (a wide column store) for analytics.
type WCSPayload struct {
wcs map[string]string
}
// Allocate and return a new WCSPayload, accepts a map[string][]string from
// net/url ParseQuery.
func NewPayload(urldict map[string][]string) *WCSPayload {
p := &WCSPayload{
wcs: make(map[string]string),
}
p.AddURLDict(urldict)
return p
}
// Add accepts a key value pair and adds them to the store.
// If either key or value is empty, discard the pair.
// If the key is not valid, discard.
func (p *WCSPayload) Add(key string, value string) {
if key != "" && value != "" {
for _, v := range validkeys {
if v == key {
p.wcs[key] = value
}
}
}
}
// AddURLDict takes a map[string][]string, (from net/url ParseQuery, for example)
// and adds the key value pair
func (p *WCSPayload) AddURLDict(m map[string][]string) {
// convert m to map[string]string
for key, _ := range m {
if len(m[key]) > 0 {
p.Add(key, m[key][0])
}
}
}
// AddDict accepts a map of key value pairs and adds them to the store
func (p *WCSPayload) AddDict(wcs map[string]string) {
for key, value := range wcs {
p.Add(key, value)
}
}
// Get accepts a key and returns a value from the store.
func (p *WCSPayload) Get(key string) string {
return p.wcs[key]
}
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Azure portal login in Microsoft Edge redirect to https://atge.okta.com
My Microsoft edge browser is sign up with my personal hotmail account. But when I browse azure portal and trying to log in, the portal page invoke https://atge.okta.com login option associated with my previous university which I no longer had access. I am not able to login to azure portal. How can I remove this https://atge.okta.com login option associated with university from the edge. I am attaching the screenshot of that log in. Thanks
enter image description here
Have you tried clearing your browser's cache?
I did. but it doesn't help
Based on what you're trying to get InPrivate mode working correctly, I think you could try troubleshooting what extensions are installed in Edge.
yeah, i choose private mode only to get instant solution to log in easily. But I add new profile on my edge browser and now it is not redirecting like before. Looks it get solved. Thanks
You should try a few different things:
Clear your browser cache, history, cookies, etc. Verify that the check boxes for Browsing history, Download history, Cookies, and Cached images and files are selected.
Open an Incognito/Private instance of your browser and attempt to access https://portal.azure.com and see if it lets your login with your personal account. This is a simple sanity check letting you know that your issue is, indeed derived from some kind of credential caching by the browser.
Reset your browser settings to defaults using the Reset Settings option in Edge's Settings view.
You can also try a workaround and access: https://my.visualstudio.com/?campaign=o~msft~msdn~nav~subscriber and login there with your personal account. According to some users this helps clear some cached credentials.
Open Credential Manager in Windows and remove any and all references to your Office 365 account that is causing issues.
If none of this works, the final option is to make sure that your device isn't being managed by your old college. In Windows, open Settings --> Accounts --> Access Work or School and make sure you unlink your device from your old school account.
EDIT: Because your issue only appears in Edge, I’m leaning towards it being an Edge/Windows Profile issue. Edge has a feature called “Automatic Profile Switching” which changes your Edge profile to “Work/School” for certain URLs. Disabling the feature doesn’t always work correctly, so I recommend simply removing your old school profile from both Windows Accounts and Edge.
I tried Option 1 and 3 and it doesn't work. Tried 2 and had no issue with login. So option 2 safe as of now. Will try 5. For option 6) don't think any issue. I downloaded chrome and try to login and it works. The issue only with Edge.
I was able to solve that issue by replacing existing one with new profile on edge browser.
Like in edge, open Settings --> Profile --> Add new profile.
Thanks for everyone.
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X. Qiu, T. Jiang, S. Wu, and M. Hayes, "Physical layer authentication enhancement using a Gaussian mixture model", IEEE Access, pp. 1-1, 2018.
H. Wang, L. Xu, W. Lin, P. Xiao, and R. Wen, "Physical layer security performance of wireless mobile sensor networks in smart city", In: IEEE Access, vol. 7. 2019, no. 3, pp. 15436-15443.
X. Li, X. Yang, L. Li, J. Jin, N. Zhao, and C. Zhang, "Performance analysis of distributed MIMO with ZF receivers over semi-correlated K fading channels", In: IEEE Access, vol. 5. 2017, pp. 9291-9303, .
H. Lei, I.S. Ansari, H. Zhang, K.A. Qaraqe, and G. Pan, "Security performance analysis of SIMO generalized-K fading channels using a mixture gamma distribution",
J.M. Moualeu, and W. Hamouda, "Secrecy performance analysis over mixed α-μ and κ-μ fading channels", IEEE Wireless Communications and Networking Conference (WCNC), 2018pp. 1-6
X. Li, J. Li, Y. Liu, Z. Ding, and A. Nallanathan, "Outage performance of cooperative NOMA networks with hardware impairments", 2018 IEEE Global Communications Conference (GLOBECOM), 2018pp. 1-6
J. Zhang, X. Li, I.S. Ansari, Y. Liu, and K.A. Qaraqe, "Performance analysis of dual-Hop DF satellite relaying over κ-μ shadowed fading channels", IEEE Wireless Communications and Networking Conference (WCNC), 2017pp. 1-6 San Francisco, CA, USA
X. Li, J. Li, L. Li, J. Jin, J. Zhang, and D. Zhang, "Effective rate of MISO systems over κ-μ shadowed fading channels", IEEE Access, vol. 5, pp. 10605-10611, 2017.
M.R. Bhatnagar, On the sum of correlated squared κ-μ shadowed random variables and its application to performance analysis of MRC
I.S. Gradshteyn, and I.M. Ryzhik, Table of Integrals, Series, and Products., 7th ed Academic: San Diego, CA, USA, 2007.
R. Subadar, and P.R. Sahu, Performance analysis of dual MRC receiver in correlated Hoyt fading channels
R. Subadar, and P.R. Sahu, Performance of a LMRC receiver over equally correlated η-μ fading channels
V.S. Adamchik, and O.I. Marichev, "The algorithm for calculating integrals of hypergeometric type functions and its realization in reduce system", International Symposium on Symbolic and Algebraic Computation, 1990pp. 212-224 New York, USA
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As technology advances, many DevOps solutions have been developed to aid in collaboration and development. We provide a list of the top 10 DevOps tools you should use in 2020 to help you hone your DevOps strategy.
One of the most used team communication tools for effective project collaboration is Slack, which was released in 2013. This DevOps solution is used by technical companies all over the world to remove barriers and provide each team member a clear grasp of the workflow. An exciting aspect of Slack is the possibility for developers to collaborate utilising toolchains in the same setting as other maintenance and service professionals.
Jenkins is an open-source continuous integration server that streamlines the entire build process for software projects. This tool's USP is the Pipeline feature, which allows developers to execute test cases, submit code to the repository automatically, and obtain test results reports.
This incredibly flexible tool provides you with fast feedback and notifies you whether a certain sprint is harming or damaging a project. The majority of the tools and tasks used during the SDLC may be automated by Jenkins, allowing team members to work more quickly.
The Docker technology is at the heart of the containerization concept, which is quickly gaining acceptance in the IT sector. Docker offers safe application packaging, deployment, and execution regardless of the current environment. The source code, supporting files, runtime, system configuration files, etc. that are necessary for programme execution are all contained in each application container.
Applications can be run remotely using the containers that can be accessed using the Docker Engine. Organizations have been able to cut infrastructure expenditures thanks to the app. A study found that within 30 days of utilising the programme, 2 out of 3 businesses who tried it embraced it.
The security of the programme is one of every DevOps team's top priorities. Because of this, developers that wish to begin the SDLC by building a secure infrastructure greatly benefit from the Phantom tool.
You can collaborate on a problem in a centralised environment with the aid of the phantom tool while also being aware of the changing security issues. Additionally, the platform gives DevOps staff the choice to immediately reduce such dangers using techniques like file detonation and device quarantine, among others.
Nagios is a monitoring tool that keeps a watch on the servers, apps, and overall infrastructure of your company, much like Phantom does. The tool is a great help for large businesses that have a lot of circuitry running in the background (servers, switches, routers, etc.). If a specific backend fault appears or if any hardware fails, it tells the users. In order to alert the user of probable errors, it also continuously updates a performance chart and looks for patterns.
A vagrant is a tool for using and maintaining virtual machines in a single workflow. Team members can share a running environment for developing and testing apps more rapidly with Vagrant because no configuration is needed.
The argument of "running on my system" can be dropped because the programme ensures that the environment for a single project stays the same on every developer's PC.
Ansible is one of the market's most user-friendly yet effective IT orchestration and configuration management tools. Ansible has a kinder outlook and fewer tools than competitors like Puppet and Chef.
This tool is mostly used to send new updates into the live system as well as configure newly deployed workstations. This is a popular option among IT companies because, to mention just two benefits, it can increase replication speed and minimise infrastructure expenses.
Even though it was first released in 2000, GitHub is currently among the top DevOps tools for straightforward collaboration. With the help of this tool, developers may swiftly iterate the code, and the other team members will be informed immediately away. Rollbacks to the previous version can be made in the event of any error or consequence in a matter of seconds thanks to the branching history of alterations that is continuously kept within the tool.
The tool continuously scans every line of code in the system for issues and defects, alerting users when it finds any. It not only draws attention to the problem but also offers several possible solutions that can be incorporated with a single click.
Similar to GitHub, BitBucket is a solution for managing project code during the software development cycle. Although GitHub is the most popular repository, people are shifting to BitBucket because of its built-in CI/CD capabilities and ease of connection with Jira and Trello, which tend to give this Atlassian service an advantage over GitHub. Because it is less expensive and has a private repository option, BitBucket is preferable to GitHub (which is only available in the paid variant of GitHub).
These are the top 10 DevOps tools that companies all over the world employ. A company's ability to deliver applications and services at high velocity is enhanced by the DevOps combination of cultural philosophies, practises, and tools. As a result, products evolve and improve more quickly than they would in organisations using traditional software development and infrastructure management processes.
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using System;
using System.IO;
using Moq;
using toofz.Services.DailyLeaderboardsService.Properties;
using Xunit;
namespace toofz.Services.DailyLeaderboardsService.Tests
{
public class LeaderboardsArgsParserTests
{
public class Parse
{
public Parse()
{
inReader = mockInReader.Object;
parser = new DailyLeaderboardsArgsParser(inReader, outWriter, errorWriter);
}
private readonly Mock<TextReader> mockInReader = new Mock<TextReader>(MockBehavior.Strict);
private readonly TextReader inReader;
private readonly TextWriter outWriter = new StringWriter();
private readonly TextWriter errorWriter = new StringWriter();
private readonly DailyLeaderboardsArgsParser parser;
[DisplayFact]
public void HelpFlagIsSpecified_ShowUsageInformation()
{
// Arrange
string[] args = { "--help" };
IDailyLeaderboardsSettings settings = Settings.Default;
settings.Reload();
// Act
parser.Parse(args, settings);
// Assert
var output = outWriter.ToString();
Assert.Equal(@"
Usage: DailyLeaderboardsService.exe [options]
options:
--help Shows usage information.
--interval=VALUE The minimum amount of time that should pass between each cycle.
--delay=VALUE The amount of time to wait after a cycle to perform garbage collection.
--ikey=VALUE An Application Insights instrumentation key.
--iterations=VALUE The number of rounds to execute a key derivation function.
--connection[=VALUE] The connection string used to connect to the leaderboards database.
--username=VALUE The user name used to log on to Steam.
--password[=VALUE] The password used to log on to Steam.
--dailies=VALUE The maxinum number of daily leaderboards to update per cycle.
--timeout=VALUE The amount of time to wait before a request to the Steam Client API times out.
", output, ignoreLineEndingDifferences: true);
}
#region SteamUserName
[DisplayFact(nameof(IDailyLeaderboardsSettings.SteamUserName))]
public void UserNameIsSpecified_SetsSteamUserName()
{
// Arrange
string[] args = { "--username=myUserName" };
IDailyLeaderboardsSettings settings = new StubDailyLeaderboardsSettings
{
SteamUserName = "a",
SteamPassword = new EncryptedSecret("a", 1),
KeyDerivationIterations = 1,
};
// Act
parser.Parse(args, settings);
// Assert
Assert.Equal("myUserName", settings.SteamUserName);
}
[DisplayFact(nameof(IDailyLeaderboardsSettings.SteamUserName))]
public void UserNameIsNotSpecifiedAndSteamUserNameIsSet_DoesNotSetSteamUserName()
{
// Arrange
string[] args = { };
var mockSettings = new Mock<IDailyLeaderboardsSettings>();
mockSettings
.SetupProperty(s => s.SteamUserName, "myUserName")
.SetupProperty(s => s.SteamPassword, new EncryptedSecret("a", 1))
.SetupProperty(s => s.KeyDerivationIterations, 1);
var settings = mockSettings.Object;
// Act
parser.Parse(args, settings);
// Assert
mockSettings.VerifySet(s => s.SteamUserName = It.IsAny<string>(), Times.Never);
}
#endregion
#region SteamPassword
[DisplayFact(nameof(IDailyLeaderboardsSettings.SteamPassword))]
public void PasswordIsSpecified_SetsSteamPassword()
{
// Arrange
string[] args = { "--password=myPassword" };
IDailyLeaderboardsSettings settings = new StubDailyLeaderboardsSettings
{
SteamUserName = "a",
SteamPassword = new EncryptedSecret("a", 1),
KeyDerivationIterations = 1,
};
// Act
parser.Parse(args, settings);
// Assert
var encrypted = new EncryptedSecret("myPassword", 1);
Assert.Equal(encrypted.Decrypt(), settings.SteamPassword.Decrypt());
}
[DisplayFact(nameof(IDailyLeaderboardsSettings.SteamPassword))]
public void PasswordFlagIsSpecified_PromptsUserForPasswordAndSetsSteamPassword()
{
// Arrange
string[] args = { "--password" };
IDailyLeaderboardsSettings settings = new StubDailyLeaderboardsSettings
{
SteamUserName = "a",
SteamPassword = new EncryptedSecret("a", 1),
KeyDerivationIterations = 1,
};
mockInReader
.SetupSequence(r => r.ReadLine())
.Returns("myPassword");
// Act
parser.Parse(args, settings);
// Assert
var encrypted = new EncryptedSecret("myPassword", 1);
Assert.Equal(encrypted.Decrypt(), settings.SteamPassword.Decrypt());
}
[DisplayFact(nameof(IDailyLeaderboardsSettings.SteamPassword))]
public void PasswordFlagIsNotSpecifiedAndSteamPasswordIsSet_DoesNotSetSteamPassword()
{
// Arrange
string[] args = { };
var mockSettings = new Mock<IDailyLeaderboardsSettings>();
mockSettings
.SetupProperty(s => s.SteamUserName, "myUserName")
.SetupProperty(s => s.SteamPassword, new EncryptedSecret("a", 1))
.SetupProperty(s => s.KeyDerivationIterations, 1);
var settings = mockSettings.Object;
// Act
parser.Parse(args, settings);
// Assert
mockSettings.VerifySet(s => s.SteamPassword = It.IsAny<EncryptedSecret>(), Times.Never);
}
#endregion
#region DailyLeaderboardsPerUpdate
[DisplayFact(nameof(IDailyLeaderboardsSettings.DailyLeaderboardsPerUpdate))]
public void DailiesIsSpecified_SetsDailyLeaderboardsPerUpdate()
{
// Arrange
string[] args = { "--dailies=10" };
IDailyLeaderboardsSettings settings = new StubDailyLeaderboardsSettings
{
SteamUserName = "a",
SteamPassword = new EncryptedSecret("a", 1),
KeyDerivationIterations = 1,
};
// Act
parser.Parse(args, settings);
// Assert
Assert.Equal(10, settings.DailyLeaderboardsPerUpdate);
}
[DisplayFact(nameof(IDailyLeaderboardsSettings.DailyLeaderboardsPerUpdate))]
public void DailiesIsNotSpecified_DoesNotSetDailyLeaderboardsPerUpdate()
{
// Arrange
string[] args = { };
var mockSettings = new Mock<IDailyLeaderboardsSettings>();
mockSettings
.SetupProperty(s => s.SteamUserName, "myUserName")
.SetupProperty(s => s.SteamPassword, new EncryptedSecret("a", 1))
.SetupProperty(s => s.KeyDerivationIterations, 1);
var settings = mockSettings.Object;
// Act
parser.Parse(args, settings);
// Assert
mockSettings.VerifySet(s => s.DailyLeaderboardsPerUpdate = It.IsAny<int>(), Times.Never);
}
#endregion
#region SteamClientTimeout
[DisplayFact(nameof(IDailyLeaderboardsSettings.SteamClientTimeout))]
public void TimeoutIsSpecified_SetsSteamClientTimeout()
{
// Arrange
string[] args = { "--timeout=00:01:00" };
var settings = new StubDailyLeaderboardsSettings
{
SteamUserName = "a",
SteamPassword = new EncryptedSecret("a", 1),
KeyDerivationIterations = 1,
};
// Act
parser.Parse(args, settings);
// Assert
Assert.Equal(TimeSpan.FromMinutes(1), settings.SteamClientTimeout);
}
[DisplayFact(nameof(IDailyLeaderboardsSettings.SteamClientTimeout))]
public void TimeoutIsNotSpecified_DoesNotSetSteamClientTimeout()
{
// Arrange
string[] args = { };
var mockSettings = new Mock<IDailyLeaderboardsSettings>();
mockSettings
.SetupProperty(s => s.SteamUserName, "myUserName")
.SetupProperty(s => s.SteamPassword, new EncryptedSecret("a", 1))
.SetupProperty(s => s.KeyDerivationIterations, 1);
var settings = mockSettings.Object;
// Act
parser.Parse(args, settings);
// Assert
mockSettings.VerifySet(s => s.SteamClientTimeout = It.IsAny<TimeSpan>(), Times.Never);
}
#endregion
}
private sealed class StubDailyLeaderboardsSettings : IDailyLeaderboardsSettings
{
public uint AppId => 247080;
public string SteamUserName { get; set; }
public EncryptedSecret SteamPassword { get; set; }
public EncryptedSecret LeaderboardsConnectionString { get; set; }
public TimeSpan UpdateInterval { get; set; }
public TimeSpan DelayBeforeGC { get; set; }
public string InstrumentationKey { get; set; }
public int KeyDerivationIterations { get; set; }
public int DailyLeaderboardsPerUpdate { get; set; }
public TimeSpan SteamClientTimeout { get; set; }
public void Reload() { }
public void Save() { }
}
}
}
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STACK_EDU
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August 8th, 2022
If you Google long enough to find interesting electronics to splurge on, you're bound to be recommended all sorts of dubious electronics. So I recently tested these little jammer gps that plug directly into a car's cigarette lighter socket. Shipping in the US is under $10, and in my opinion, this device is perfect for opening it up in the name of science.
You might be wondering what legal uses this gadget has. As far as I know, no. The only reason you'd want to interfere with the GPS signal around your device is if you're trying to get away from something you shouldn't. Maybe you're driving a tracked company vehicle and want to take a few hours of naps in the parking lot, or maybe you want to turn off the built-in GPS of a stolen car so you have enough time to get to the workshop.
However, we won't focus too much on the potential malicious causes of such devices. Hackers never have to be picky about the equipment they research and experiment with, so it's not worth buying. Let's test this iron better from the regular "grey" area and see how it works.
Although the GPS satellite orbit altitude of 20,200 kilometers is not as high as that of the communication satellites in the geosynchronous orbit, it is still far from us. Given the distance and size of the antennas on most GPS devices, it's not surprising that the signal received from them is very weak. So much so that it is usually weaker than noise. Only very clever algorithms and a little magic can make your phone hear the whispers of the stars and turn it into something akin to useful information.
It's the fragility of this signal that makes it possible to make such a low-cost jammer. To suppress such a signal, not much is needed. Note that the device isn't trying to mimic GPS satellites - it's just broadcasting spam, loud enough that the real satellites can't be heard.
The jammer is so harsh that it completely overwhelms the drone signal at 300 meters, even without a directional antenna.
Of course, our first thought is to come to a drone competition or exhibition, turn on the jammer, and send everyone the business card of the drone repair shop.
It turns out that interfering with WiFi, Bluetooth or Zigbee signals is not difficult at all. All you need is a simple $15 dongle that you can get on Amazon. It connects to a computer or Raspberry Pi. The base antenna has a range of 80 meters. If a signal amplifier is installed, the working distance of the jammer can reach about 120 meters. Signal jammers have been actively used by attackers. For example, car thieves use
portable jammer to prevent the car from locking, and GPS jammers to block signals from anti-theft systems (after the car is stolen). Burglars use such jammers to block cellular service during illegal entry into apartments.
Add precisejammers to your subscriptions feedprecisejammers
To notify a previous commenter, mention their user name:
@peter-smith if there are spaces.
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Boskernovel The Beautiful Wife Of The Whirlwind Marriage txt – Chapter 1282 – The Gu Family Cannot Hold a Candle to Gu Jingze irritating achiever suggest-p2
Novel–The Beautiful Wife Of The Whirlwind Marriage–The Beautiful Wife Of The Whirlwind Marriage
Chapter 1282 – The Gu Family Cannot Hold a Candle to Gu Jingze modern rescue
Crooked Throat expected, “Eh, KG, you claimed well done with a wedding. Who just got married?”
Qin Hao only replied coldly, “Throw they all out. The audacity of them to disrupt Sir and Madam’s rest. Leave no mercy.”
Becoming God Of A Dystopian World
Uneven The neck and throat inquired, “Eh, KG, you reported best wishes over a wedding event. Who just got hitched?”
At that moment, KG breezed in. “Congratulations on the wedding party.”
“Madam, are you alright? Sir is awaiting you for the entrance.”
Gu Jingze’s guards believed the way to take part in the online game. They made a decision to attack their faces as well as other areas where individuals could see the traumas. It absolutely was a view to behold.
That they had learned a thing or two from the sturdy guards during their teaching time and have been always in awe of which. At that moment, discovering them directly only ignited their fear all the more.
Some were actually saddened. That they had imagined they might find some good practical experience from it but rather, they embarra.s.sed by themselves.
the belgian cookbook 1915
“What, you are the Small Experts in the Gu spouse and children and received dumped with a simple a.s.sistant. Not only this, and you also have yourselves beaten up so pathetically. You continue to dare to come back home?”
“Oh, the television system is originating on. Might it be considered a pleasant special occasion?”
With this, how could she never be content material?
He did not talk about a assure or lighlty pressing words and phrases but she managed to notice that his every actions obtained handled all people.
“Ha, which is for sure but there’s nothing at all a great deal to enjoy about.”
“That is the reason. They can be in the similar exercising camping plus they could not earn the combat. Not one little bit of strength and so they received defeated out.”
Chen Hui walked in and found the couple of them close to. With the front door, he was quoted saying, “Perfect timing, you folks are all listed here. However I don’t figure out what you did, the Gu household isn’t suing you any longer. However I will have to say, I would like to restore every little thing that’s rightfully my own.”
Uneven Neck area investigated Lin Che after she came into. “Sister Che, you gaze bright and chirpy. Does one thing transpire?”
“Oh, the television software is originating on. Could it be considered a contented special occasion?”
“They be like younger ages of your Gu clan, behaving all high and mighty. Choice they won’t have the ability to store their heads as large any more after getting educated a class by an a.s.sistant.”
On this, how could she not really information?
Lin Che exclaimed in surprise, “How are you aware, KG, you….”
Chen Hui searched in big surprise, went above, and requested, “What about Lin Che…? What’s so scary about her?”
Lin Che exclaimed in big surprise, “How were you aware, KG, you….”
“What, you are the Young Masters from the Gu loved ones and acquired thrown out with a simple a.s.sistant. And also, but the truth is also received yourselves outdone up so pathetically. You will still dare to return residence?”
At that moment, KG breezed in. “Congratulations with your wedding day.”
Pity that there was only one Gu Jingze, men of those grade in the world. Lin Che possessed it too fantastic.
So that’s what hackers could do. It was actually so irritating.
“We really experienced absolutely no way of succeeding, knowning that Qin Hao was too conceited.”
“Yes, let’s go and provides him an effective pounding. His master won’t a single thing even if we do better than him to loss. He would probably still thank us for doing away with this insolent.”
These folks were actually feeling displeased. They could have dwelled in your own home when the small experts, but they acquired tasked being the messengers.
Chen Hui checked in astonish, walked around, and asked, “What about Lin Che…? What is so terrifying about her?”
Chen Hui walked in and found the few of them about. For the home, he explained, “Perfect the right time, you people are below. Though I do not know very well what you probably did, the Gu spouse and children isn’t suing you any more. Although I really have to state, I want to regain every thing that’s rightfully mine.”
These people were actually emotion displeased. They can have dwelled at home because the fresh masters, nonetheless they bought tasked to become the messengers.
“How could it be? What about those guards you introduced combined? Does they eat s.h.i.+t?”
So that’s what hackers could do. It absolutely was so aggravating.
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Reconstructing historical marine ecosystems using food web models: Northern British Columbia from Pre-European contact to present
ABSTRACT Mass-balance trophic models (Ecopath with Ecosim) are developed for the marine ecosystem of northern British Columbia (BC) for the historical periods 1750, 1900, 1950 and 2000 AD. Time series data are compiled for catch, fishing mortality and biomass using fisheries statistics and literature values. Using the assembled dataset, dynamics of the 1950-based simulations are fitted to agree with observations over 50 years to 2000 through the manipulation of trophic flow parameters and the addition of climate factors: a primary production anomaly and herring recruitment anomaly. The predicted climate anomalies reflect documented environmental series, most strongly sea surface temperature and the Pacific Decadal Oscillation index. The best-fit predator–prey interaction parameters indicate mixed trophic control of the ecosystem. Trophic flow parameters from the fitted 1950 model are transferred to the other historical periods assuming stationarity in density-dependent foraging tactics. The 1900 model exhibited an improved fit to data using this approach, which suggests that the pattern of trophic control may have remained constant over much of the last century. The 1950 model is driven forward 50 years using climate and historical fishing drivers. The resulting ecosystem is compared to the 2000 model, and the dynamics of these models are compared in a predictive forecast to 2050. The models suggest similar restoration trajectories after a hypothetical release from fishing.
[show abstract] [hide abstract]
ABSTRACT: One of the greatest obstacles to moving ecosystem-based management (EBM) from concept to practice is the lack of a systematic approach to defining ecosystem-level decision criteria, or reference points that trigger management action. To assist resource managers and policymakers in developing EBM decision criteria, we introduce a quantitative, transferable method for identifying utility thresholds. A utility threshold is the level of human-induced pressure (e.g., pollution) at which small changes produce substantial improvements toward the EBM goal of protecting an ecosystem's structural (e.g., diversity) and functional (e.g., resilience) attributes. The analytical approach is based on the detection of nonlinearities in relationships between ecosystem attributes and pressures. We illustrate the method with a hypothetical case study of (1) fishing and (2) nearshore habitat pressure using an empirically-validated marine ecosystem model for British Columbia, Canada, and derive numerical threshold values in terms of the density of two empirically-tractable indicator groups, sablefish and jellyfish. We also describe how to incorporate uncertainty into the estimation of utility thresholds and highlight their value in the context of understanding EBM trade-offs. For any policy scenario, an understanding of utility thresholds provides insight into the amount and type of management intervention required to make significant progress toward improved ecosystem structure and function. The approach outlined in this paper can be applied in the context of single or multiple human-induced pressures, to any marine, freshwater, or terrestrial ecosystem, and should facilitate more effective management.PLoS ONE 01/2010; 5(1):e8907. · 4.09 Impact Factor
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|Thesis abstract: |
This thesis presents a reference model and some computational methods for the automatic detection of affective states of people interacting with artificial systems. The model can be successfully adopted to analyze and compare many Affective Computing studies evaluating similarities and differences among proposed approaches. When we first approached Affective Computing and started reviewing the literature, we noted that the same problem was being approached from different points of view. While the main question - to automatically recognize emotions - was shared among various studies, a wide range of dissimilar experiments was conducted. These heterogeneous approaches, however, were sharing some key aspect of Emotion Detection problem in Affecting Computing. Nevertheless, without a well-defined model, it was difficult to deeply understand which aspects (variables) were the most relevant, and how they were related to each other. This lack of a common model motivated us to formalize the problem. Sharing a general model helps to better approach and analyze the problem and to systematically verify hypotheses. This lead to an improvement of the formalization of the problem toward a valid, and effective formulation. We introduce a machine-centered model that characterizes the interaction between a subject and a machine as well as the affective state of the subject. The model is general enough to represent many different experimental protocols as well as more practical scenarios proposed by both the Psychophysiology and the Affective Computing communities. To complete the model, we discuss some methodological issues related to Emotion Detection. An agreed methodology should provide the guidelines to follow in the realm of formal use and evaluation of the model. In fact, we propose a methodology aimed at guiding the use of the model to design experiments, data acquisition, data preprocessing (e.g., artifact removal, data normalization and feature extraction), data analysis and validation (e.g., how to get a correct estimation). Guidelines are provided for the selection of stimuli and questionnaires, to control the possible sources of noise and their influences of the measurements. After the formal definition of the model and the methodological discussion, we present our case study whose original purpose is to advance the knowledge about Affect Detection in video games. In particular, we are interested in investigating whether physiological measurements could discriminate the player's preference between different video game experiences. A number of critical issues needed to be addressed during the design of the experiment. We studied whether physiological response could provide a more robust and interesting insight, since classical metrics, such as in-game performance, are not necessarily a good estimate of the preference for a generic player. The answer to this question is an important aspect for the development of an adaptive video game able to offer different game experiences according to the preferences inferred from the players physiological status. In principle, different players have different preferences, given their experience, their mood, the emotions they feel, and many other factors. If we could identify the player's preference on-line, we might adapt the game to match it. Different analyses have been performed: from preference learning approach, to the canonical classification approach using k-NN and 3 classes of enjoyment. A comparison of performances between physiological features and in-game features showed that the latter can better predict the user reported preference. However, a deeper analysis showed that in-game features were more correlated to the task than to the preference itself. This result has been obtained thanks to a novel approach, derived from our model, that exploits the correlation between stimuli, emotion, and ground truth. When classes of preferences are unbalanced, the proposed method helps to find the features that result more correlated to the reported preference.
|
OPCFW_CODE
|
How can i make Rust program become self-contained?
How can i make my Rust program become self-contained. It mean my program will run independent in every Windows machine.
i tried to use:
cargo build --release
But when i run on another computer, i still missing some dll:
Can someone help me?
Not a windows expert, but I don't think you can statically link DLLs (the name alone seems to indicate as much).
Did you have any dependencies requiring linking with libusb? If so, how did you do it? Was it using VCPKG?
Relevant: https://stackoverflow.com/q/76586303/5397009
The dumpbin.exe program can help.
If you run dumpbin.exe /dependents path\to\my\program.exe, you should see a list of the .dll libraries which are required by your program.
Then you have to rerun the command dumpbin.exe /dependents path\to\the\library.dll recursively for each of the reported libraries.
This is quite tedious, but I guess you can automate that with a script.
Then, when you install your program to a new computer, you can place in the same directory as your executable all the collected libraries.
When we launch an executable on Windows, the libraries are searched in several standard directories and in the directory where stands this executable.
All the libraries you provided should be found here.
Alternatively, you can simply launch your executable on the target and each time the missing library message appears, you find it in the source computer and put it next to the executable on the target computer.
The problem with this alternate solution is that if the target computer already contains a non-standard library that you need, then you will not notice it, and it may be missing on another target computer.
Dependencies Walker can scan recursively if you want to get all the required DLLs at once.
Depending on your target, rustc links libraries differently, as specified here:
x86_64-unknown-linux-gnu links dynamicly to glibc
x86_64-unknown-linux-musl links staticly to musl
x86_64-pc-windows-msvc links dynamicly to MSVCRT
The RFC linked above includes a feature - static CRT linkage, that change whether the C standard library is linked dynamically or statically.
To enable it in your project:
Create a .cargo\config.toml file in the root folder:
Add the following into it:
[target.x86_64-pc-windows-msvc]
rustflags = ["-Ctarget-feature=+crt-static"]
[target.i686-pc-windows-msvc]
rustflags = ["-Ctarget-feature=+crt-static"]
Build the executable, and then try running it on another computer.
If you wish for this to be the default for all your projects, you can put it in
%USERPROFILE%\.cargo\config.toml instead.
I don't think libusb is in the standard C runtime, or am I misunderstanding what this feature does?
|
STACK_EXCHANGE
|
A programming language is a proper and formal language that has been designed to enable programmers to communicate instructions to a computer. Programming languages can be used to create programs. Scripting languages are generally a type of programming language that supports scripts. Scripts are programs written to control another programs.
File extension .GM. Description of the problem. If you have on your computer a .GM file that you cannot open, you are in exactly the same situation as thousands of other people who have similar problems with this or any other unknown file. There may be several reasons why you cannot open the file with .GM extension. Directly on this website you can find a solution of the most common problem.
To create .GM files, you have to use GameMonkey Script or any other program listed below. Software for Android, Linux, Mac, Windows, Windows Phone, and iOS can be downloaded from official stores. You can also get .GM file creator from its official web page. To learn more about .GM file launcher and its alternatives, visit the program official web site.Read More
Python Coding - solving sample tasks. The only way you are going to get good at Python and coding is to code! Do also check out our other sections on GCSE and A Level coding (in Learning Pathways) Sample tasks provided by your exam board are a great way to problem solve. Don't give up until you've got there. This particular task is NEA TASK 2.Read More
Script written for GameMonkey Script, a scripting language used for embedding logic into games and other applications; uses syntax similar to the C language and uses concepts similar to the Lua language; can be used for custom software modifications. GameMonkey Script files can be run with the GameMonkey Script engine and edited with any text editor.Read More
Download Microsoft Script Repository Software. Advertisement. Advertisement. Microsoft Agent Scripting Software v.2.2 Microsoft Agent Scripting Software 2.2 is a small and easy to use software that helps you in creating MS Agent Script for your website. It gives you full control over your MS Agent script, you can easily create agent scripts by dragging the character. Microsoft Expression.Read More
Here's a list of programming languages. Most of them as of making this page are red. Make sure every page has an example.Read More
Script written for GameMonkey Script, a scripting language used for embedding logic into games and other applications; uses syntax similar to the C language and uses concepts similar to the Lua language; can be used for custom software modifications. More Information. GameMonkey Script files can be run with the GameMonkey Script engine and edited with any text editor. FREE DOWNLOAD. Open over.Read More
Game wardens ordinarily can arrest violators, seize illegally taken game, bring actions for trespass, or institute prosecutions for violations of the game laws. Under a number of game laws, it is a penal offense to kill or take certain types of game in certain seasons of the year or without a license.Read More
A scripting language or script language is a programming language that supports the writing of scripts, programs written for a software environment that automate the execution of tasks which could alternatively be executed one by one by a human operator.Read More
This has been a useful guide to Differences between Programming Languages vs Scripting Languages. Here we have discussed Programming Languages vs Scripting Languages head to head comparison, key differences along with infographics and comparison table. You may also look at the following articles to learn more. Angular vs Knockout-What are the.Read More
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OPCFW_CODE
|
Single developer, using TFS, want to work from home and office, looking for guidelines regarding check in
I use VS2012 and TFS and am the only programmer checking in code. Usually, I leave code on my machine until a change is complete and then check it into tfs. I'm not using branches or anything else clever.
Now I'd like to start working from home. I have tried RDP'ng to my office machine, but it's just not the same. I find the slight delay takes me out of the flow. I can install VS on my home machine and all the tools I use.
I'm looking for some guidelines or practices I should follow. If I write some code in the office, do I check it in every day? Shelve it? I need to be ready to work the next day from home.
Well, for a simple solution, I would go for a trunk (release version) and (at least one) branch.
Every day (at least), you check-in to your "currentWorkBranch", or a specific branch if you're working on a specific point.
So you work on your code (home and work) from / to this Branch.
When you're ok with your code, you merge it into your trunk (can do this from home and work too).
By the way, I would do this even when working in a single place. Never keep your code just on your machine if you can avoid this !
Thanks for the ideas. My machine does get backed up every night, so I haven't worried too much about losing code in progress. Will have to remember to check in code to the working branch before leaving though!
Personally I would use shelvesets. I do not like to use checkins to save work. In my opinion a checkin should represent a finished piece of work.
Shelvesets however are designed for saving work. That is why this would make more sense to me.
I agree; shelvesets work well for this. You do need some discipline, since you end up with parallel checkouts on both machines and it's easy to get out of sync, but it's a great way of saving work to the server without checking in.
I partially agreee : the concept is fine, but (to be pragmatic) shelveset are less "user-friendly" for a daily usage (get latest version is easier than "shelve-unshelve" GUI). For the need of the OP, I think this might be an argument. Anyway, just a point of view.
@RaphaëlAlthaus I agree about your usability point. Shelvesets are a little clumsy when being compared to Get Latest. I think your way is a better process. As long as you treat the Merge from Branch -> Trunk as the Checkin (provide a detailed comment etc), then your way works well.
Personally, I would say that, if it's practical, branch for each distinct piece of work (or feature) and just get used to checking in smaller, complete pieces of work into that branch. Many frequent check-ins will not only solve the working from home issue, but will also avoid some potentially painful merges (depending of the number of other people working on the same code base).
When the feature is complete it can be merged as a whole into the main code branch.
EDIT: Having just re-read your question, it occurs to me that you mean you are the only developer using the TFS repository. My suggestion still stands though, not least because it's extensible.
|
STACK_EXCHANGE
|
Multisig brings various benefits of security for transactions in the virtual currency market, but many people don’t know much about this platform. So, in this article, we will introduce and explain for you about Multisig’s information, pros and cons, its mechanism, and some exchanges that can install this wallet.
1. What is Multisig?
Multisig or Multisig wallet is an abbreviation of Multisignature, which is a technology that requires many secret keys in transaction signatures.
When compared to Singlesig that has only one secret key, Multisig has advantages such as a higher level of security, easy to handle when the secret key is lost. Furthermore, it is used in exchanges and Multisig Wallets.
2. Pros and cons of Multisig
The great benefits of Multisig are increased security and risk management in case of loss of secret keys. But it also has disadvantages that we should know.
2.1. Pros of Multisig
- Increasing security: Assuming that even one secret key information is hacked and leaked, you will not lose your property if your account requires 2 or more signatures. And It is, of course, obvious that you must not lose all the necessary secret keys of transactions. Anyway, Multisig gets less risk than Singlesig.
- Reducing the risk of corruption: At a company, or exchanges, accountants take full responsibility of managing all, so, in some cases, they have a chance to conduct corruption. However, you don’t worry much when creating Multisig for many levels in order to reduce the risk of corruption.
- Risk management of losing secret keys: in reality, when you lose your key that is used to enter your transaction wallets, you cannot touch the money inside. But, if you set up Multisig “2-of-3” that means “registering 3 public keys with 2 or more signatures to be accessible”, even if you lose 1 secret key, you still use money. And, you should note that if you lose all of your keys, you cannot take money.
2.2. Disadvantages of Multisig
- Spending time for set-up: the process of setting Multisig up “2 of 3” wastes time, because you must gather 3 public keys, and build up the secret keys for each one, store it at separate places as well in some cases. If you register more public keys, you will set up more secret keys. Furthermore, you want to enhance the security, you have to conduct many steps in the Multisig wallet. But, you can use DNS to simplify addresses to reduce the process of setting up.
- Increased service fees: compared to regular Singlesig, this is a complex function that uses many secret keys, so there is an additional service fee for setting up and sending money to others.
- Be Unable to deal with The exchange’s security flaws: When conducting virtual currency transactions, you need a wallet (electronic wallet). Users deposit the wallet at an exchange and make a transaction. However, users cannot directly manage the e-wallet. In other words, if the secured exchange is weak, there is a chance that the secret key will be leaked, and they cannot respond to the exchange’s management method. Moreover, even if the exchange supports Multisig, it is not certain that security is absolute, so you must disperse risk by “not keeping a secret key at any exchanges”.
3. Multi-sig mechanism
Simply, we can imagine it as a secure deposit box with two locks and two keys. One key is held by you, and another by your mother. The only way you can open the box is to have both keys at the same time, so one person cannot open the box without the other’s consent.
Basically, funds are stored on a multi-signature address that can only be accessed using 2 or more signatures. Therefore, using a multi-signature wallet allows users to create an extra layer of security for their funds.
That is the multisig mechanism, users can look when having intention to join the virtual currencies like Etherium, Bitcoin, Ripple,… And next, we will introduce to you about 3 platforms that support Multisig in order to make it easier without coding.
4. Electronic wallet supporting Multisig
4.1. ELECTRUM wallet
This is a wallet to manage Bitcoin on PC, as it is equipped with Cold Wallet function, and Multisignature as well in order to ensure higher security. But, this wallet doesn’t support mobile.
How to create a Multisig wallet with ELECTRUM?
- You should install ELECTRUM at first
- Next, you can change the wallet’s name “default wallet” into your favorite name.
- Select “Multi-signature wallet” on your PC
- Creating secret keys and choosing how many keys you want to open.
- Registering public keys
- Entering the primary public key of co-signer and finish.
This is step by step to generate Multisig that you can apply when using the ELECTRUM platform.
If you are using Copay, you can easily set up Multisig Wallet for Bitcoin, and this supports either mobile as well as PC.
Way to create Multisig address with Copay
- Downloading Copay is the first step that you need to do.
- Then, you should click “add wallet”, àn select “add new wallet”
- Choosing the “shared wallet”
- Selecting the required number of registered public keys and necessarily secret keys. In the case of using someone else’s public key, let’s send the displayed QR code for that person to read.
- Clicking “join the shared wallet”
- Now, clicking the public key to use
- Finally, you just click “join” and finish.
4.3. Nano wallet
You can set up a Multisig wallet for NEM if you use Nano wallet, and this is also available for mobile and PC.
Step by step for installing Multisig with Nano wallet
- Creating new wallet in Nano wallet and log in
- Click in “Change to Multisig”
- Entering public keys to register
- Entering number of secret keys to conduct transactions and complete.
In conclusion, that is the information of Multisignature that is secure for your transaction based on the increasing number of signatures. Although it also has some disadvantages, we cannot deny that Multisig will be applied more in the near future on the exchanges.
|
OPCFW_CODE
|
One of the problems with 'you should submit a patch'
Today I reported a relatively small issue in the development version of ZFS on Linux. In theory the way of open source development is that I should submit a patch with my problem report, since this is a small and easily fixed issue, and I suspect that a certain number of the usual suspects would say that I'm letting down up my end of the open source social compact by not doing this (even though the ZoL developers did not ask me for this). Well, there's a problem with this cheerful view of how easy it is to make patches:
It's only easy to make half-assed partially tested patches. Making well-tested good ones is generally hard.
In theory this issue and the fix is really simple. In practice there are a bunch of things that I don't know for sure and that I should test. Here's two examples that I should do in a 'good' patch submission:
- I should build the package from scratch and verify that it installs
and works on a clean system. My own ZFS on Linux machine is not
such a clean system so I'd need to spin up a test virtual machine.
- I should test that my understanding of what happens when an
ExecStartPrecommand fails is correct. I think I've correctly understood the documentation, but 'I think' is not 'I know'; instead it's superstition.
Making a patch that should work and looks good and maybe boots on my machine is about ten minutes work (ignoring the need to reboot my machine). Making a good patch, one that is not potentially part of a lurching drunkard's walk in the vague direction of a solution, is a lot more work.
(This is not particularly surprising, because it's the same general kind of thing that it takes to go from a personal program to something that can pass for a product (in the Fred Brooks sense). The distance from 'works for me' to 'it should work for everyone and it's probably the right way to do it' is not insubstantial.)
Almost all of the time that people say 'you should submit a patch' they don't actually mean 'you should submit a starting point'. What they really want is 'you should submit a finished, good to go patch that we can confidently apply and then ship'. At one level this is perfectly natural; someone has to do this work and they'd rather you be that person than them (and some of the time you're in a theoretically better position to test the patch). At another level, well, it's not really welcoming to put it one way.
(It also risks misunderstandings, along the same lines as too detailed bug reports but less obviously. If I give you a 'works for me' patch but you think that it's a 'good to go' patch, ship it, and later discover that there are problems, well, I've just burned a bunch of goodwill with the project. It doesn't help that patch quality expectations are often not spelled out.)
There are open source projects that are genuinely not like this, where the call for patches really includes these 'works for me' starting points (often because the project leadership understands that every new contributor starts small and incomplete). But these projects are relatively rare and unfortunately the well is kind of poisoned here, so if your project is one of these you're going to have to work quite hard to persuade skittish people that you really mean 'we love even starting point patches'.
(Note that this is different from saying basically 'bug reports are only accepted when accompanied by patches'. Here I'm talking about a situation where it seems easy enough to make a patch as well as a bug report, but the devil is in the details.)
Email providers cannot stop spam by scanning outgoing email
One of the things that Amazon SES advertises that it (usually) does is that it scans the outgoing email that people send through it to block spam. This sounds great and certainly should mean that Amazon SES emits very low levels of spam, right? Well, no, not so fast. Unfortunately, no outgoing mail scanning on a service like this can eliminate spam. All it can do is stop certain sorts of obvious spam. This is intrinsic in the definition of 'spam' and the limitations of what a mail sending system like Amazon SES does.
Essentially perfect content scanning can tell you two things: whether the email has markers of known types of spam, such as phish, advance fee fraud, malware distribution, and so on, and whether the email will be be scored as spam by however many spam scoring systems you can get your hands on the rules for. These are undeniably useful things to know (provided that you act on them), but messages that fail these tests are far from the only sorts of spam. In particular, basically all sorts of advertising and marketing emails cannot be blocked by such a system because what makes these messages spam is not their content, it's that they are unsolicited (cf, cf).
The only way to even theoretically tell whether a message is solicited or unsolicited is to control not just the sending of outgoing email but the process of choosing destination email addresses. If you only scan messages but don't control addresses, you have very little choice but to believe the sender when they tell you 'honest, all of these addresses want this email'. And then the marketing department of everyone and sundry descends on Amazon SES with their list of leads and prospects and people to notify about their very special whatever it is that of course everyone will be interested in, and then Amazon SES is sending spam.
(Or the marketing people buy 'qualified email addresses' from spam providers because why not, you could get lucky.)
There is absolutely nothing content filtering can do about this. Nothing. You could have a strong AI reading the messages and it wouldn't be able to stop all of the UBE.
(I wrote a version of this as a comment reply on my Amazon SES entry but I've decided it's an important enough point to state and elaborate in an entry.)
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OPCFW_CODE
|
About the writer: Harvey Morehouse is a contractor/consultant with many years of experience using circuit analysis programs. His primary activities are in Reliability, Safety, Testability and Circuit Analysis. He may be reached at firstname.lastname@example.org. Simple questions for which I know the answer are free. Complex questions, especially where I am ignorant of the answers, are costly!!!
Summary: Convergence is a recurring problem in performing SPICE analyses of circuits. The attached articles contain the bulk of the information that needs be conveyed, however some additional thoughts seem appropriate. Read the referenced articles first.
First things first:
Before anything else, build your model using tested models for new devices. Often convergence issues involve these new devices. As an example, consider a behavioral model for a device. Particularly when this model is replicated, especially when it is in a regenerative or a bistable configuration, it can present problems. Why is this?
Consider that all replicated devices are identical in performance save for specified initial conditions. In REAL regenerative devices, such as astable multivibrators, the circuit as shown on a schematic can be truly symmetrical, whereas a real-world implementation may rely on noise or non-perfect component matching to 'get started'.
Unfortunately there is no easy way to randomly tolerance devices such that they are not a perfect match, or to add a 'noise' voltage to insure the circuit will start. (Wish list: add a rnd(n) function to B2SPICE to enable random part values to be specified, or a small noise generator to be created. The proposed function would return a pseudo-random number between zero and unity, where 'n' could represent a uniform distribution for the value '0', a Gaussian distribution for a '1' argument, and so on.)
In the SMPS #3 article in the resources section, a flip-flop was created using behavioral models of 3-input NAND devices. This device model will not converge without some 'tweaking'. One solution is to use different NAND3 implementations, one with an output initial condition of '1' or high (MAND3-1), and the other '0' or low (NAND3-0). This would work in most cases. Another would be to modify the models internally slightly to make each of the NAND3 gates slightly different. A third would be to internally insure the devices performed differently by use of hysteresis in the models for the NAND3 devices. A fourth would be to externally add loading at the outputs (or inputs) to make the devices behave slightly differently. Lastly, some combination of the above might be tried if all else fails. In the article mentioned the fourth method was used with success.
All SPICE analyses start with a DC analysis. In order to arrive at a starting point, several techniques are use, some of which are done automatically. One is source stepping. IF convergence cannot be achieved with the specified source values, the DC sources are set to a small non-zero value and then increased. If one uses nonlinear sources to create devices, especially with logical functions, this may not be fully useful IF one uses constants for voltages levels as opposed to SPICE voltage sources.
Consider the following equation for a nonlinear generator (refer to the articles on logical equations in the resources section of the B2SPICE web site):
V = 5 -u(v(4,2)-1)*3
In this case the '5' represents a voltage source which is not stepped, nor is the output level if the condition, V(4,2)>1, is met. It might be useful to enable source stepping (if needed) by specifying a DC voltage generator (V9 as an example) of 5 volts, and modifying the equation slightly to become similar to:
V = V9 * (1 - u(v(4,2)-1)*.6)
Switching Mode or other Switched Circuits:
Switching Mode Power supply circuits (and some others) are characterized by relatively rapid switching intervals that are infrequent compared to the time intervals when the circuit responds to the switched devices. If the switch changes are unrealistically rapid, at best the solution will require long simulation times. Often it will not converge.
The solution is to use non-ideal switching elements to represent diodes, transistors and other devices that in reality do not change as abruptly as ideal elements. This can be done by creating smooth switches, or, by adding capacitances and resistances to ideal elements. The added elements need not be vary large, and ideally will create transitions similar to a real device although this may not be required to achieve convergence.
Vexing though it can be at times, most circuits can be made to converge with some effort. The key is to understand where the non-convergence is, why it occurs, and what can be done to enable convergence. Always assume it is a circuit implementation problem before messing with the analysis settings. And then, when convergence is achieved, examine carefully the circuit voltage and current values to insure they are accurate.
Case in point: an AC analysis is a small-signal analysis about a DC operating point. Consider an improperly configured analysis where the DC operating point 'solution' is (erroneously) close to a device 'rail'. The AC analysis might indicate suitable operation, whereas a transient analysis with an AC input would reveal signal clipping.
Performing a SPICE analysis takes thought, time, and work. Often several different circuit models may have to be developed to obtain the proper results. All models are approximations, and the key is to find the right one which properly displays circuit performance to the required accuracy. One cannot just buy a SPICE program and use it and expect perfect results without careful thought. IF something about the analysis results seem strange, or defy explanation, do NOT pass it by without determining what is happening.
1. Solving SPICE Convergence Problems, Intusoft articles, http://www.intusoft.com/articles/converg.
2. EDN, Step-by-step procedures help you solve Spice convergence problems
SMPS Simulations with SPICE3, Stephen Sandler, McGraw Hill, Chapter
Solving Convergence Problems, ISBN 0-07-9132227-8.
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OPCFW_CODE
|
from plisp import types
class Environment:
def __init__(self, base=None):
if base is None:
self.table = {}
self.macros = {}
self.forms = {}
else:
self.table = base.table.copy()
self.forms = base.forms.copy()
self.macros = base.macros.copy()
def _get_from_table(self, symbol, table):
if symbol in table:
return table[symbol]
def _set_in_table(self, symbol, value, table):
table[symbol] = value
return value
def in_forms(self, symbol):
return symbol in self.forms
def in_macros(self, symbol):
return symbol in self.macros
def in_symbols(self, symbol):
return symbol in self.table
def get_form(self, symbol):
return self._get_from_table(symbol, self.forms)
def set_form(self, symbol, value):
return self._set_in_table(symbol, value, self.forms)
def get_macro(self, symbol):
return self._get_from_table(symbol, self.macros)
def set_macro(self, symbol, macro):
return self._set_in_table(symbol, macro, self.macros)
def get_symbol(self, symbol):
return self._get_from_table(symbol, self.table)
def set_symbol(self, symbol, value):
return self._set_in_table(symbol, value, self.table)
def lookup(self, name):
symbol = types.Symbol(name)
if self.in_forms(symbol):
return self.get_form(symbol)
if self.in_macros(symbol):
return self.get_macro(symbol)
if self.in_symbols(symbol):
return self.get_symbol(symbol)
return None
|
STACK_EDU
|
This patch reduces the size of all tools by about 2MB of text
(depending on the arch).
This has as advantages:
1. somewhat faster build/link time (very probably neglectible)
2. somewhat faster tool startup (probably neglectible for most users,
but regression tests are helped by this)
3. a gain in memory of about 10MB
The valgrind tools are making the assumption that host and guest
are the same. So, no need to drag the full set of archs when
linking a tool.
The VEX library is nicely split in arch independent and arch dependent
objects. Only main_main.c is dragging the various arch specific files.
So, main_main.c (the main entry point of the VEX library) is compiled
only for the current guest/host arch.
The disadvantage of the above is that the VEX lib cannot be used
anymore with host and guest different, while VEX is able to do that
(i.e. does not make the assumption that host and guest are the same).
So, to still allow a VEX user to use the VEX lib in a multi arch setup,
main_main.c is compiled twice:
1. in 'single arch mode', going in the libvex-<arch>-<os>
2. in 'multi arch mode', going in a new lib libvexmultiarch-<arch>-<os>
A VEX user can choose at link time to link with the main_main
that is multi-arch, by linking with both libs (the multi arch being
the first one).
Here is a small (rubbish crashing) standalone usage of the VEX lib,
first linked in single arch, then linked in multi-arch:
// file t1.c
$ gcc -I Inst/include/valgrind -c -g t1.c
$ gcc -o t1 t1.o -LInst/lib/valgrind -lvex-x86-linux -lgcc
$ gcc -o t1multi t1.o -LInst/lib/valgrind -lvexmultiarch-x86-linux -lvex-x86-linux -lgcc
$ size t1 t1multi
text data bss dec hex filename
519393 556 5012188 5532137 5469e9 t1
2295717 1740 5015144 7312601 6f94d9 t1multi
In a next commit, some regtests will be added to validate that the two libs
are working properly (and that no arch specific symbol is missing when
git-svn-id: svn://svn.valgrind.org/vex/trunk@3113 8f6e269a-dfd6-0310-a8e1-e2731360e62c
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Sql Server Stored Procedure Raiserror
Once this has been done, you can check @err, and leave the procedure. This is basically a habit I have. If you have technical questions that any knowledgeable person could answer, I encourage you to post to any of the newsgroups microsoft.public.sqlserver.programming or comp.databases.ms-sqlserver. When a non-fatal error occurs within a procedure, processing continues on the line of code that follows the one that caused the error. this contact form
To cover the compilation errors, that SET XACT_ABORT does not affect, use WITH SCHEMABINDING in all your functions. sp_addmessage @msgnum =50001, @severity =10, @msgtext ='An error occured updating the NonFatal table' --Results-- (1 row(s)affected) Note that the ID for a custom message must be greater than 50,000. Note: I'm mainly an SQL developer. SET QUOTED_IDENTIFIER ON vs SET QUOTED_IDENTIFIER OFF 8.
Sql Server Stored Procedure Raiserror
For accuracy and official reference refer to MS Books On Line and/or MSDN/TechNet. Understand that English isn't everyone's first language so be lenient of bad spelling and grammar. DateTime vs DateTime2 7. Send to Email Address Your Name Your Email Address Cancel Post was not sent - check your email addresses!
BEGIN SET @ErrorToBeReturned = 'Your Custom Error Message' END ELSE BEGIN SET SET @ErrorToBeReturned = '' --YOUR CODE HERE END RETURN @ErrorToBeReturned Then you can use an ReturnValue Parameter to fetch With THROW we can’t raise the System Exception. For the same reason, don't use constraints in your table variables. How To Display Message In Sql Stored Procedure Varchar vs Varchar(MAX) 3.
A similar reasoning applies when it comes to COMMIT TRANSACTION. Return Error Message From Stored Procedure To C# LOG - Forces the error to logged in the SQL Server error log and the NT application log. When I call a stored procedure, I always have a ROLLBACK. http://stackoverflow.com/questions/13647437/how-to-get-sql-error-in-stored-procedure RAISERROR vs THROW 11.
You can run into errors like overflow or permissions problems, that would cause the variables to get incorrect values, and thus highly likely to affect the result of the stored procedure. How To Find Error In Stored Procedure In Oracle When the user continues his work, he will acquire more and more locks as he updates data, with increased risk for blocking other users. If you don't have any code which actually retrieves the number of affected rows, then I strongly recommend that you use SET NOCOUNT ON. However, this thinking is somewhat dangerous.
Return Error Message From Stored Procedure To C#
For example, if your application allows users to type in the name of the table on which a query is based you can verify it’s existence before referencing it with dynamic http://www.sqlteam.com/article/handling-errors-in-stored-procedures EXEC @err = some_other_sp @value OUTPUT SELECT @err = coalesce(nullif(@err, 0), @@error) IF @err <> 0 BEGIN IF @save_tcnt = 0 ROLLBACK TRANSACTION RETURN @err END BEGIN TRANSACTION INSERT permanent_tbl1 (...) Sql Server Stored Procedure Raiserror Reply Basavaraj Biradar says: April 18, 2016 at 10:44 am Thank you Luke… Appreciate your comments… Reply Pingback: Difference between DateTime and DateTime2 DataType | SqlHints.com Pingback: T-SQL: Crear errores custom Stored Procedure Error Codes The following example substitutes the values from the DB_ID() and DB_NAME() functions in a message sent back to the application: other DECLARE @DBID INT; SET @DBID = DB_ID(); DECLARE @DBNAME
We will look closer at this in the next section. http://stylescoop.net/stored-procedure/sql-server-stored-procedure-return-code.html SELECT @err = @@error IF @err <> 0 RETURN @err UPDATE #temp SET ... CREATE PROCEDURE error_test_demo @mode char(1) AS CREATE TABLE #temp (...) DECLARE @err int, ... SELECT @save_tcnt = @@trancount ... Sql Server Stored Procedure Error Handling
Treat my content as plain text, not as HTML Preview 0 … Existing Members Sign in to your account ...or Join us Download, Vote, Comment, Publish. And, as if that is not enough, there are situations when ADO opens a second physical connection to SQL Server for the same Connection object behaind your back. All rights reserved. navigate here INSERT fails.
But both ADO and ADO .Net (but not ODBC or DB-Library) employs connection pooling, which means that when you close a connection, ADO and ADO .Net keep it open for some Sql Server Stored Procedure Error Handling Best Practices Just add a new case to your case statement for each possible return code. The number of options available for the statement make it seem complicated, but it is actually easy to use.
Note: you can invoke a scalar function through EXEC as well.
Note: this article is aimed at SQL2000 and earlier versions of SQL Server. That does not mean that I like to discourage your from checking @@error after SELECT, but since I rarely do this myself, I felt I could not put it on a For the same reason, my experience of ADO and ADO .Net programming is not in par with my SQL knowledge . Incorrect Syntax Near Raiseerror In the first section, I summarize the most important points of the material in the background article, so you know under which presumptions you have to work.
Note: whereas I cover most of the statements above in one way or another in this text, I am not giving any further coverage to text/image manipulation with READTEXT, WRITETEXT and Nov 12, 2011 09:49 PM|sandeepmittal11|LINK CREATE PROC PROCNAME AS BEGIN DECLARE @ErrorMessage NVARCHAR(MAX) BEGIN TRY IF 1=1 BEGIN RAISERROR('Record Exists', 16, 1) RETURN END END TRY BEGIN CATCH SELECT @ErrorMessage = If we execute this with a RegionID that already exists, DECLARE @rtnVal int EXEC @rtnVal = dbo.CreateRegion1 @RegionID = 2, @RegionDescription = N'Western' we get this error Server: Msg his comment is here SELECT can occur in three different situations: Assignment of local variables. (This also includes of SET for the same task).
In this case, when an error occurs in the function, execution continues and you can check @@error within the UDF.
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I was asked a question the other day:
When upgrading an Oracle Database, do we need to disable the scheduler (DBMS_SCHEDULER)?
The short answer is: No …. or perhaps.
What Happens During Analyze
When you use AutoUpgrade in Analyze mode (
java -jar autoupgrade.jar -mode analyze), it will check your database. It is a non-intrusive check, and normal operations can continue, including use of the scheduler.
What Happens During Deploy
When downtime starts, and you are ready to upgrade your database, you start AutoUpgrade in Deploy mode (
java -jar autoupgrade.jar -mode deploy).
Analyze And Fixups
First, AutoUpgrade will re-analyze the database, and based on the findings; it will run pre-upgrade fixups. The fixups make changes to the database, like gathering dictionary statistics, emptying recycle bin and other administrative tasks. The scheduler remains active during this period, so if you have any jobs that do administrative things on the database, like gathering statistics, there is a chance that they will collide. But typically not a problem.
Then the actual upgrade of the database can start. This happens while the database is started in upgrade mode (
When the database is started in upgrade mode, many things are disabled automatically. The scheduler being one of them.
Examples of other changes that happen in upgrade mode:
- System triggers are disabled
- Certain parameters are changed
- Resource Manager is disabled
You can check the alert log for more information. Here is a snippet:
2022-05-17T11:56:54.585122+02:00 AQ Processes can not start in restrict mode
After the actual upgrade, the database is restarted in normal mode. The scheduler becomes enabled again.
In this phase, AutoUpgrade is recompiling invalid objects and performing post-upgrade fixups. Changes will be made to the database, like re-gathering dictionary statistics. Similar to the pre-upgrade fixups, depending on the nature of your scheduler jobs, there is a risk of things colliding. That can cause waits or concurrency issues.
Finally, the time zone file is upgraded. This process requires the database to be started in upgrade mode again. Again, the scheduler will be automatically disabled.
What Is The Answer?
From a functional point of view the scheduler is enabled and working during some parts of an upgrade. Only during the most critical parts is it automatically disabled.
So, the answer is: No, you do not need to disable the scheduler during upgrade. The database will automatically disable it when needed.
But the database is restarted multiple times which of course will affect any running scheduler jobs. Depending on the nature of your scheduler jobs, you might decide to disable it completely during the entire database upgrade. For instance, if you have long-running jobs or jobs that are sensitive to being interrupted. On the other hand, if your jobs are short-running, restart easily, or you basically don’t care, then it is perfectly fine to leave it all running during a database upgrade.
Manually Disable The Scheduler
If you decide to disable the scheduler manually, you should temporarily change
SQL> alter system set job_queue_processes=0 scope=both;
Don’t forget to set it to the original value after the upgrade.
You can find more information in MOS note How to disable the scheduler using SCHEDULER_DISABLED attribute in 10g (Doc ID 1491941.1).
A few more words about upgrade mode:
When you start Oracle Database in upgrade mode, you can only run queries on fixed views. If you attempt to run other views or PL/SQL, then you receive errors.
When the database is started in upgrade mode, only queries on fixed views execute without errors. This restriction applies until you either run the Parallel Upgrade Utility (catctl.pl) directly, or indirectly by using the dbupgrade script). Before running an upgrade script, using PL/SQL on any other view, or running queries on any other view returns an error.
About Starting Oracle Database in Upgrade Mode, Upgrade Guide 19c
Starts the database in OPEN UPGRADE mode and sets system initialization parameters to specific values required to enable database upgrade scripts to be run. UPGRADE should only be used when a database is first started with a new version of the Oracle Database Server.
When run, upgrade scripts transform an installed version or release of an Oracle database into a later version, for example, to upgrade an Oracle9i database to Oracle Database 10g. Once the upgrade completes, the database should be shut down and restarted normally.
7 thoughts on “Do I Need To Disable the Scheduler During Upgrade?”
Unfortunately when you set job_queue_processes=0, then you lose the ‘parallel’ functionality of AutoUpgrade isn’t it? On one of our recent RU update, we do find the need to disable the jobs where we have materialize view refreshes scheduled on dba_jobs as it is reporting blocking session all day until we have to kill the running job or set it to broken totally. There seems to be a bug of sort when AU migrated dba_jobs to dba_scheduler especially when it comes to enabling the job from the scheduler.
Did further test to setting the jobs to be broken, looks like the Year 4000 thing is not a 19C/AU ‘feature’, we set the job to broken pre-upgrade and noted the next start date shows Year 4000
The parallel capability of AutoUpgrade (or any upgrade method) does not rely on “job_queue_processes”. You can safely set it to 0 and still use parallel upgrades.
The conversion from DBMS_JOB to DBMS_SCHEDULER happens transparently during the upgrade. I have not heard about any issues like yours. However, it does not sound like intended use to set a job to start date in year 4000. What is the reason for that? In DBMS_SCHEDULER it is better to “disable” the job instead.
Any thoughts about setting system level plsql_code_type=native and then run autoupgrade deploy mode. In the sense of errors, elapsed time, dictionary objects and final compilation using utlrp.sql. ?
I know is a generic question . Recently I had an upgrade and I had to change one internal package to interpreted in order to be able to finish the autoupgrade and compile.
I would advise strongly against that. The stuff in the dictionary is managed by us. When you move away from the defaults, you are “sailing into uncharted territory”. It might work, but there is no guarantee and I fear that you eventually (even long after the upgrade) run into weird problems.
Thanks for your answers. On more thing. Will I be in safe site if before upgrade I change the parameter plsql_code_type=interpreted (default value) and after the upgrade returned it back to native value. That’s because I don’t know know why,who,when change it. I’m just the DBA doing the upgrade.
That should be fine. When you set it to the default during upgrade, those objects that was created/compiled during upgrade will have the “interpreted” flag set and will then onwards all be compiled that way – even if you change the parameter. However, you must remember to change that during upgrades, patching and other sorts of maintenance operations.
I would recommend switching to the default, and then as alter session switch the setting when you compile those objects that really needs that setting (if any).
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This topic describes the best practices for fixing software vulnerabilities on servers.
How to fix software vulnerabilities
Unlike vulnerability fixes on PCs, software vulnerability fixes on servers require professional knowledge. You must follow the following steps to fix software vulnerabilities:
- Check all assets on the target server and log on to Security Center to check system vulnerabilities on the server. For more information about parameters of Linux software vulnerabilities, see Parameters of Linux software vulnerabilities.
- Determine the vulnerabilities that you want to fix. You do not need to fix all vulnerabilities immediately. You can determine the vulnerabilities to fix based on actual business conditions, server usage, and the impacts of these vulnerabilities.
- Install patches for vulnerabilities that you want to fix in the staging environment, test compatibility and security, and generate testing reports on vulnerability fixes after tests are completed. A testing report must contain the vulnerability fix result, fix duration, patch compatibility, and impacts caused by the vulnerability fix.
- Use the backup and recovery system to back up the data on the server in case of exceptions. For example, use the snapshot feature of an ECS instance to back up data.
- Upload vulnerability patches to the server and use the patches to fix vulnerabilities. This task requires a minimum of two administrators: One administrator is responsible for vulnerability fixes and the other one is responsible for records. Exercise all operations with caution.
- Upgrade the system and fix vulnerabilities based on the sequence of system vulnerabilities.
- Validate the vulnerability fixes on the server. Make sure that the vulnerabilities are fixed and that no exception occurs on the server.
- Generate a vulnerability fix report based on the entire vulnerability fix process and archive the relevant documents.
Software vulnerability fix guidelines
We recommend that you take the following measures to minimize the possibility of exceptions and ensure that no damage is caused to the system during vulnerability fixes, and that the system can recover and run normally after the fixes are complete:
- Develop a vulnerability fix plan
Research the operating system and applications of the server and develop an applicable vulnerability fix plan. The feasibility of the plan must be discussed and verified in a testing environment. You must strictly follow the instructions and steps in the vulnerability fix plan to fix vulnerabilities and make sure that no damage is made to the system on the server.
- Use a testing environment
Use a testing environment to verify the feasibility of your vulnerability fix plan. Make sure that the plan has no impact on the online business system that you want to fix.Note The testing environment must use the same operating system and database system as your online business system. The version of applications in the testing environment must be the same as those on your online business system. We recommend that you use the latest replication of the entire business system for testing.
- Back up the business system
Back up the entire business system, which includes the operating system, applications, and data. After you back up the system, you must restore your system to validate the backup. A system backup guarantees the stability of your business. If a system exception or data loss occurs, you can use the backup to restore your system. We recommend that you use the snapshot feature of ECS to quickly back up your business system.
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People Picker attempts to use claim based authentication but the web application authentication provider is classic / windows
We recently in-place upgraded our sharepoint 2007 to sharepoint 2010.
We were using Windows authentication in the 2007 environment and wish to continue doing so in the 2010 environment.
The authentication provider for all web applications (portal | central admin | shared services) is Windows (NTLM).
[EDIT: To clarify, this is in classic mode for all web applications].
If we load the people picker to assign permissions in our portal web application, it displays the classic mode view and works just fine.
If we load the people picker to assign permissions in our central administration, it displays the classic mode view and works just fine.
If we load the people picker to assign permissions to a Secure Store Service Targe Application, we receive an error "An error has occurred in the claim providers configured from this site collection".
I am confused. We are not using claims based authentication?
When the people picker loads, we see the Claims Based view rather than the Classic mode view (See http://technet.microsoft.com/en-us/library/gg602068.aspx for differentiation).
Any thoughts on why the People Picker would be trying to use Claims Based Authentication only when setting permissions for a secure store target application?
[EDIT: Further info]
This is in the error log:
02/10/2012 14:52:12.43 w3wp.exe (0x1304) 0x0E18
SharePoint Foundation Claims Authentication 8307 Critical
An exception occurred in All Users claim provider when calling SPClaimProvider.FillHierarchy():
The connection name 'LocalSqlServer' was not found in the applications configuration or the connection string is empty.
(C:\Windows\Microsoft.NET\Framework64\v2.0.50727\Config\machine.config line 148).
084879fb-8d9b-4abd-be0c-aed55789601c
NB: I am not looking for instructions on how to configure claims based authentication. I am trying to figure out why People Picker is using claims based authentication and how to stop it!
Has the machine.config file mentioned been changed?
You mention that the Auth Provider is windows. But you are in "Claims-mode" or "Classic-mode"?
Hi Paul, no changes have been made manually to the machine.config. The authentication provider for all three web applications is classic. I have updated the question to clarify that.
Looks to me like there are some rogue configurations in your web.config. Did you ever set a custom membership/role provider manually or in IIS? Did you ever use FBA?
The error message you're getting looks like there is a custom membership provider set which uses a non-existing (or no longer existing) connectionstring for a local SQL server instance. So when you open up the people picker it tries to look up those members and fails.
I would check the web.config and verify the default providers and the people picker wildcards.
That was going to be my suggestion. If you had FBA configured at some point in time, it's possible that during the upgrade something got reverted there. Double check that the providers are setup correctly on the web applications. Also confirm the web.config for Central Administration and the STS services as they're all configured separately.
probably you can try to remove PeoplePicker entry from web.config of your classic app
Ivan, thank you for responding, but your response does not help me at all.I don't want to remove PeoplePicker. I want to use PeoplePicker with Classic mode authenticaiton.
well, I didn't suggest to remove PeoplePicker. I was mentioned "PeoplePicker entry in web.config" :) Did you try that? And please also check web config for STS as well.
Fair point, sorry about that! I tried and it didn't help...
There are many blogs suggesting for configuring proper Alternate Access Mappings in Central Admin to resolve this error. Did you try that out?
To know how AAM's are configured please visit the below links -
http://technet.microsoft.com/en-us/sharepoint/Video/ff679917
http://sharepoint2010hosting.asphostcentral.com/post/SP-2010-Hosting-How-To-Configure-Alternate-Access-Mappings-(AAM)-in-Sharepoint-2010.aspx
Hi Deepu. Yes, AAMs are configured for servername, FQDN and localhost.
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tomIs it theoretically or practically possible for a TCP connection to fail to setup over a loopback interface? Assuming the transport is perfectly ideal eg, the linux kernel loopback interface; Can you expect TCP to work 100% of the time?
jonas’there are always resource limits which can be hit, e.g. lack of available source ports
tomSay you check the return code of prosody's HTTP server for a 200OK every 10 seconds for months on end
tomOtherwise the logs don't report anything good AND the daemon quitting successfully with a regular SIGTERM
tomShould I suspect prosody's failure or check_http's failure
tomI've got plenty of headroom there jonas
jonas’tom, which daemon quit?
tomI have a screen which checks prosody's health every 10 seconds
tomAnd restarts the daemon if it doesn't work
Licaon_KterOVH on fire, everyone is up?
tomWhat kind of hosting company releases updates over some third party social media service instead of their own website
tomThat is laughable
jonas’using a third party service is exactly what you should do
jonas’and exactly what should be in your plans
jonas’when your DC is on fire, you cannot rely on your own website being available
tomSpeaking of, what kind of datacenter catches on fire
jonas’any datacenter can catch fire
tomTheir built not to though
jonas’rumors are that this was an arc fault in DC equipment. if that happens at the right amperage, you can only let it burn down
tomHalon systems and whatnot
jonas’halon systems are forbidden in the EU since the 90ies
» <jonas’> when your DC is on fire, you cannot rely on your own website being available
OVH is big enough to have an HA webserver, or at least anycast
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jonas’tom, they also have that: https://status.us.ovhcloud.com/
jonas’so maybe also stop assuming that twitter is their only communication channel ;)
jonas’also, if you are the CEO of a cloud company whose DC just literally went up in flames… I don’t fucking blame you for using twitter.
tomThanks for that list Licaon_Kter
mikeYeah that's about when I last recall seeing it online.
» <jonas’> also, if you are the CEO of a cloud company whose DC just literally went up in flames… I don’t fucking blame you for using twitter.
jonas’, when disasters happen on this scale there were several things and factors that were festering for a very long time that allow them to happen
jonas’tom, I don’t think that’s necessarily true.
Licaon_Ktertom: fire and twitter accounts don't mix, c'mon
jonas’but before speculating, maybe wait for a post mortem?
Licaon_KterI bet the CEO did not put the nuts and bolt of the building :)
Licaon_KterYes, hopefully they'll do a postmortem
tomMismanagement at best
jonas’also, I’d like you to be a bit more thoughtful
jonas’the engineers which are now having a real bad day might even be here if they run a private XMPP server
tomWe will see
» >The last big downtime crisis at OVH also happened at the Strasbourg campus. A power outage in 2017 brought the entire campus down. Forty minutes later, its campus in Roubaix lost connectivity due to an unrelated software bug in networking equipment.
tomThey have been having "power problems" for a very long time
moparisthebestthere's always a silver lining https://twitter.com/craiu/status/1369633870786797568
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Licaon_Ktermoparisthebest: the "known" but not taken down part is...odd...c'mon...
KrisI find it interesting in just how much the cloud hosting pricing race to the bottom has not only resulted in massive overprovisioning of VPS hardware, but also servers being hosted in litteral old shipping containers (and buildings that seem hardly more in substance).
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moparisthebestare you saying recycling is bad ? :P
Krisdoes anyone remember that study that showed most xmpp servers are hosted on Hetzner infra? all I can find right now is a similar one on Mastodon servers: https://bitkeks.eu/blog/2020/03/underlying-problem-fediverse-decentralised-platforms.html
moparisthebestI'm not sure that's a problem though, I mean, assuming proper backups etc it should be easy to quickly fail over to anywhere else
Kristo some extend yes. but some of the privacy benefits of xmpp are lost when the data just moves from one server to the other in the same datacenter
Krisin regards to metadata
moparisthebestI'm not sure, the datacenter has more visibility, but state actors likely have less
Licaon_KterKris: so...you say I should make my own datacenter first?
Host at home? "Oh terrible"
Host at hosting? "Oh noes"
Effing move the goalpost further
Krishostng at home (depending on your ISP) is great
Krisand at least in theory it can be even greater with ip6
Krisbut what I am actually saying: some awareness of datacenter centralisation and resulting issues is probably good to have
Krispeople complan about AWS and then happily host their stuff on Hetzner because it costs 20ct less per month
moparisthebestI don't know that there's an easy solution though, generally I like a reliable provider other people are happy with, not a brand new one I have to test first
Krisyeah no easy solutions to that one
Ge0rGjust move it into the cloud with homomorphic encryption!
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Krisfefe reader exposed
Licaon_Kter> fefe reader exposed
Krisah maybe not. famous german IT blogger just had a bit rant about homomorphic encryption 😉✎
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Krisah maybe not. famous german IT blogger just had a big rant about homomorphic encryption 😉 ✏
jonas’FWIW, I don’t host at hetzner because they’re cheap, but because they’re the *only* european hoster I was able to find which:
- offers proper IPv6 (= /64 or greater, *routed* to the server)
- proper virtualization (no virtuozzo or lxc, real kvm)
- isn’t super shady, i.e. offers at least GDPR-compliant contractor things (I only know the german term, "Auftragsverarbeitungsvertrag")
jonas’if you know another ISP which offers that, I would *really* like to know, because currently most of my stuff is in the same AZ (hetzner’s) and I like cross-AZ redundancy
jonas’it still needs to be affordable though, >15 Eur/month for a mail server is not something I’m going to invest.
Krisnetcup.de has the same I think, but also in germany
moparisthebestI moved to hetzner in about 2013 after using many other hosts over many years and so far they've been the best
jonas’netcup is on my do-not-use-list
jonas’I had very bad interactions with them when moving a domain from them to another registrar
moparisthebestit's always good to see other suggestions though
beni like hetzner and ovh, currently using soyoustart
Krisah, yes they are a bit possessive of their .de domains
beni ordered an ax101 from hetzner like a month ago one evening while a bit drunk
benstill trying to decide what to put on it
moparisthebestisn't soyoustart also ovh ?
Ge0rGKris: of *their* .de domains? ;)
Ge0rGwell, DNS is obviously black magic that nobody understands.
KrisYeah, DNS... but kind of understandable as labour costs for even 5 minutes of support on 20ct/month domain name reselling basically wipes out any profit for the next 10 years.
benyeah soyoustart is an ovh sub-company
Ge0rGI'm looking for somebody from omemo.im
vanitasvitaeGe0rG, their website lists firstname.lastname@example.org
Ge0rGvanitasvitae: and their 0157 lists an email address, but they have no MX.
Ge0rGvanitasvitae: I pinged the JID an hour ago
Ge0rGmaybe I just shouldn't expect express delivery.
jonas’PSA: I changed the JID of the search.jabber.network crawler. It is now email@example.com. So don’t be surprised if you see that in your logs instead of the old firstname.lastname@example.org
Licaon_KterGe0rG: omemo.im was just a fork of Conversation, abandoned...
> > JID: email@example.com
> According to https://omemo.im/contact.html
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How to Debug Node JS Application Efficiently?
Any online project can occasionally experience sophisticated issues that require us to debug the backend code in order to grasp the situation. We may investigate these troubling scenarios using the debugging skill, and with the aid of this skill, we can accurately examine how each line of our code is processed. We can also investigate the values of the variable following the execution of a single instruction.
Developers frequently disregard debugging because it is a talent that is very undervalued. Your understanding of your code will be accurate thanks to this ability, which will also help you become a better developer and create code more efficiently. It’s not always a good idea to use console.log(), and it takes time to do so.
Moving on, let’s talk about how to debug Node.js applications.
Conditions to Debug NodeJs App in Visual Studio Code
Before you debug a Node Js application, you should be aware of the following:
- Basic understanding of node.js (Express)
Debug Node JS Application: A Step-by-Step Guide
Let’s go gradually to stay on the Node.js debug process.
Step 1: Create a Node.js Application
Starting with a straightforward Node.js application with a single endpoint, we next do some random things. Any Node.js project can be used.
As of right now, we only have a very simple application that filters objects from an array according to the type specified in the query parameters. Here is our primary JS file, called app.js.
The tasks are listed below. json document that contains an array of items (list of tasks).
The aforementioned express app example is a simple one in which tasks are listed and filtered. The endpoint for carrying out this process is as follows.
http://localhost:3000/all-tasks can be used to obtain all tasks.
the following URL will filter tasks by the specified type: all-tasks?taskType=personal
Let’s move on to the subsequent Node.js debugging phase.
Step 2: Setup Node.js Debugger With “Nodemon”
To debug a Node JS application, we are using nodemon. Let’s install Nodemon worldwide by running the following command:
After installing nodemon, use the following command to utilise nodemon to serve the node.js application:
This command will serve your application to a specified port, in this case 3000, thus the programme is running at http://localhost:3000. Here, app.js is the primary file of the Node.js application.
Let’s go on to the next step, which is to enable the debugging option in Visual Studio Code.
Step 3: Start debugger in VS code
You can now choose “Debug: Attach Node Process” by typing “Debug: Attach” into the search box. As soon as you click it, the following screen will appear:
Essentially click on the first of them, which are simply node processes that are active on your system, to reveal a debug controller that looks like this:
Now that the debugger is running, all that is left to do is add some breakpoints to cause the execution to halt there. However, before we go on to breakpoints, let’s first understand some fundamental concepts regarding the debugger and debug controller.
Basic Debug Controller Overview
The items in the debug controller are given numbers, which you can use to understand their functions. The debug controller is shown here:
Test the controller
The descriptions of each section are given below.
Play/pause: Used for start and pause debugging
Step In: It will help you to carry out step-by-step instructions if you want to carry out instructions line by line.
Step inside: This option allows you to dive deep into a function or statement and debug there as well. For example, if you are calling a function in the middle of the script, you can easily get into those functions as well.
Restart: the debugger from the beginning or the first breakpoint.
Disconnect: A command to halt debugging
Breakpoints are a crucial component of debugging since they show debuggers where to stop an execution. Set breakpoints in your code to connect to a debugger that halts execution here and records the values of executed variables.
The following is a screenshot showing a few breakpoints. Breakpoints can be applied by clicking the left side of the editor (left side of the line number column).
Now that you’ve put the breakpoint, the execution will halt here. Let’s start the debugger to check how things are going.
Step 4: Run Debugger with Breakpoint
To activate the debugger, adhere to steps 2 and 3. Let’s get to the endpoint where the code will be executed after the debugger has been activated.
You will get a screen similar to the one below whenever you reach the appropriate endpoint or execution starts for the code portion in which you have indicated the breakpoints:
When execution is terminated, it seems like this. This is comprehensive info while your code is being run line by line. To help you better grasp how to debug Node js applications, let’s explain these areas.
This section lists all the variables that were employed in the relevant code section. You can also view each variable’s corresponding value here. When execution for a variable is complete, you will see the variable’s real-time value, so you might see certain variables are undefined or null because of this.
Simply put, it is a history of every execution. For instance, you may examine every execution that took place prior to the present execution.
You can locate all the breakpoints you’ve added to the project in this section, which organises them all in one location.
The debugger and how to debug a Node.js app are covered in that. We hope that this blog will enable you to successfully troubleshoot Node JS. Do you need any Node.js application development, feel free to contact Nettyfy Technologies at any time.
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Table of Contents
- Bitcoin implements several technologies developed by previous projects.
- Prior attempts at digital currency laid the groundwork for Bitcoin’s novel implementation of established economic principles.
- Bitcoin’s creation required the invention of new technologies.
What Bitcoin Achieves
As a currency, Bitcoin solves several problems that legacy currencies faced. The Bitcoin network allows for peer-to-peer payments without requiring a trusted third party. Additionally, Bitcoin solves the Byzantine Generals Problem by implementing a Proof-of-Work mechanism and maintaining its data on a decentralized ledger so that all members of the network can agree on a single state of the ledger.
Bitcoin’s Technological Prerequisites
The whitepaper that put forth these solutions was proposed in 2008, prior to Bitcoin’s creation in 2009, but the ideas and technologies employed for its creation had been in development for several decades prior.
Bitcoin’s process for ensuring that only the rightful owner can spend their bitcoin, the Elliptic Curve Digital Signature Algorithm, relies on elliptic curve cryptography. The idea and mechanics of elliptic curve cryptography were proposed by mathematicians in 1985.
Another crucial piece of Bitcoin’s technology is Proof-of-Work. This technology is the backbone of Bitcoin’s mining operations, a necessary component of the Bitcoin network’s functionality. Proof-of-Work systems were developed progressively throughout the 1990’s with the biggest leaps being Wei Dai’s b-money in 1998 and Adam Back’s Hashcash in 1997.
Bitcoin’s Conceptual Prerequisites
In addition to technological components, Bitcoin employs several economic ideas that were developed beforehand.
The idea of an anonymous payment network was initially popularized by DigiCash in 1989. Over the following decade this idea was iterated on several times, with DigiCash rebranding to eCash. However, both of these projects were designed to facilitate anonymous transactions of existing fiat currencies.
Virtual economies, which created and employed their own currencies, were introduced by video games such as RuneScape and World of Warcraft in the early 2000’s. The persistent value of these virtual currencies served as an important proof of concept as to what could give a currency value.
Liberty Reserve, founded in 2006, popularized the idea of anonymously processing payments outside of the legacy financial system for the broader market of global currency, taking the idea of videogame’s virtual currencies to the global scale. Liberty Reserve was dissolved in 2013 as a result of legal issues.
In addition to utilizing the best parts of past projects, Bitcoin implements innovations that were uniquely its own. Bitcoin’s blockchain was the first successful implementation of an electronic currency that didn’t rely on a centralized ledger.
In Bitcoin’s whitepaper, Satoshi Nakamoto cited this centralization as a critical flaw in existing electronic payment systems.
The decentralized ledger removed the need for a trusted third party to control the currency, instead letting it be governed by every actor in the network. Operating on a decentralized ledger required a solution to the Byzantine Generals Problem to ensure that users could agree on a single state of the ledger and thus avoid double spends and other invalid transactions.
To solve this problem, Bitcoin deploys a Proof-of-Work mechanism. By using an adapted version of reusable Proof-of-Work, Bitcoin is able to scalably reach consensus without the need for intervention or dispute resolution from a central authority. Although prototypes for this concept were proposed in 2004 by Hal Finney, Bitcoin was the first project to successfully implement the idea.
Another factor that allows the Bitcoin network to successfully operate without the oversight of a central authority is Bitcoin’s difficulty adjustment. This novel concept allows the Bitcoin network to automatically adjust the degree of difficulty associated with mining a single block.
Difficulty adjustments are made based on the speed at which miners are creating new blocks. By adjusting the difficulty of mining, Bitcoin can ensure new coins are mined at the predetermined rate, regardless of the amount of computing power participating in the network. This automatic adjustment makes the network incredibly robust and scalable, without concerns of hyperinflation or a lack of network security.
Finally, Bitcoin introduced the concept of blockchain immutability to ensure that past transactions on the network could not be tampered with. Every new block is appended to the end of the existing blockchain, further cementing past transactions.
The only way to edit a past transaction would be by rewriting the entire block containing the transaction and all subsequent blocks. Additionally, the malicious actor would then need to create additional blocks to append to the edited block. This actor would need to create new blocks at a higher rate than the rest of the entire Bitcoin network in order to catch up and create the new longest chain.
Build your Bitcoin wealth with River
No-fee recurring buys
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This topic provides a list of new capabilities and known issues at 10.2.6.
A patch for ArcGIS Runtime SDK 10.2.6 for Qt has been released. The patch's description, list of issues addressed, its installation instructions are available for download from the Patches and Service Packs page of the Esri support website.
Support for OAuth2
ArcGIS Runtime SDK for Qt 10.2.6 adds support for OAuth 2.0 authentication. For general information about OAuth 2.0 in ArcGIS and how to use it in different scenarios, see ArcGIS Online Authentication.
Using Qt WebEngine in your Windows app
If you use Qt WebEngine in your Windows app, your deployed app may encounter a crash due to the Qt bug 42083 titled WebEngine deployment issue on Windows. Please see the bug report for a discussion and possible work-around for this issue.
Using multiple Qt versions on Mac OS X
It is possible to install multiple versions of the Qt Company’s Qt Framework (i.e. multiple Qt kits) on the same development machine. On Mac OS X, installing and using both Qt 5.4.1 and Qt 5.5 with the ArcGIS Runtime SDK for Qt can lean to compatibility issues.
The difficulty can occur after running the ArcGIS Runtime SDK post-installer for both kits, because both kits will link to the same libEsriRuntimeQt.dylib. For example, you install Qt 5.4.1 and run the post-installer. You then install Qt 5.5 and run the post-installer. Now you can build and run an app for Qt 5.5, but building and running an app with Qt 5.4.1 will not work because as it is linking to a library that is configured to run with Qt 5.5. As a result an error will occur similar to the following:
QObject: Cannot create children for a parent that is in a different thread. (Parent is QmlArcGISTiledMapServiceLayer(0x7fa0f311c5d0), parent's thread is QThread(0x7fa0f1c1f350), current thread is QThread(0x7fa0f1d33560)
You can re-enable development for a Qt kit by re-running the post installer and selecting the folders containing the version of Qt you would like to use.
Migrating existing apps
To use projects built with version 10.2.5, some minor changes are required to source and project files.
ANGLE and DirectX on Windows
Windows only: Starting with 10.2.6, ArcGIS Runtime SDK for Qt for Windows builds use ANGLE instead of OpenGL to enable DirectX on Windows. Because the 10.2.6 SDK libraries for Windows don't include OpenGL libraries, your 10.2.5 app will crash when Qt attempts to access OpenGL libraries by default rather than ANGLE libraries. To tell Qt to use ANGLE by default, add this code at the beginning of your app. To see exactly where to place this code, see the main.cpp source file in the Runtime SDK C++ and QML template applications.
// Force usage of OpenGL ES through ANGLE on Windows
You need a Qt Prebuilt Component (a kit) that includes ANGLE support to develop 10.2.6 apps on Windows. Please refer to the System requirements topic for details.
Changes to prf file names in project files
The post installer copies Qt project feature (*.prf) files into the Qt kits on your development machine. Prior to ArcGIS Runtime 10.2.6 for Qt, these files had the same name from release to release. To support side-by-side installations in the future, the file names now include version numbers.
In existing QML Qt project files, you will see a line that looks like this.
CONFIG += c++11 arcgis_runtime_qml
CONFIG += c++11 arcgis_runtime_qml10_2_6
Side-by-side installation with 10.2.5 is not supported
Version 10.2.5 and any related Beta release of the ArcGIS Runtime SDK for Qt may not be installed with any later release on the same machine. This means that you may not install version 10.2.6 if 10.2.5 is on the same machine. We plan to support side-by-side installations in upcoming releases.
Important issues addressed in this release
- Fixed an issue preventing connections to ArcGIS 10.3 servers.
- Improved connection speed to some secure services.
- Fixed a crash that occurred when a secure token expired.
- Fixed issues relating to setting credentials on various layers and tasks.
- Fixed an issue setting of a definition expression on a feature layer.
- Fixed an issue with getting distinct values from a feature layer.
- Fixed an issue honoring default values of a layer in a local sync geodatabase.
- Enabled editing of standalone tables in a feature service.
Developing Android QML apps is not supported on Red Hat Enterprise Linux 6.x.
If you are using Red Hat Enterprise Linux 6.x and the Esri-provided build of the Qt SDK, you must copy two folders from the Qt SDK installation folder to the folder containing the executable before running your app for the first time from Qt Creator. The folders are the plugins/platform folder and the qml folder. This is covered in the Guide topic Install and set up on Linux.
Due to a missing attribute in Qt Creator 2.7.2 (which is required for Red Hat Enterprise Linux 6.x) an edit must be made to the wizard template XML. Browse to the templates location in two folders, ~/.config/QtProject/qtcreator/templates/wizards/ArcGISRuntimeQmlTemplate and ~/.config/QtProject/qtcreator/templates/wizards/ArcGISRuntimeQtTemplate. In both folders, modify the file wizard.xml to delete the class="qmakeproject" attribute from the wizard tag in the XML. This attribute is supported in Qt Creator 3 but not present in Qt Creator 2.7.2. This is covered in the Guide topic Add a map to your app.
Positioning support via geoclue is unavailable in the Esri-provided Qt SDK RHEL 6. If you need this functionality you can build the Qt SDK yourself from source with this option enabled.
Users may encounter the following issue when building for Android: SDK Build Tools revision (19.0.3) is too low for project 'projectname'. This is because regardless of the target API version (eg. 17), Qt Creator requires the Android SDK Build Tools Rev 19.1
Interoperability between identical object instances from both the C++ and QML APIs is not supported. For example, passing a Point geometry object from QML to C++ and performing geometry operations on that Point in C++ is not supported.
The Qt QNetworkConfigurationManager property isOnline does not work on Linux platforms.
There are a number of C++ classes (such as Geoprocessing) that have not yet been exposed to the QML API, but are intended for release in the future.
When automatically completing code in the code editor, sometimes Qt Creator will offer the names of signals that are not members of the class or component you are working with. When in doubt, refer to the Runtime SDK for Qt API documentation to see the signals associated with various classes and components.
Putting a MouseArea over the Map prevents propagation of mouse events to the area of the Map under the MouseArea.
There are some issues to watch for when working with the Android app template in Qt Creator on Windows. Due to a Qt Company bug relating to when there are spaces in the file path referenced in the Android .prf file, we added logic to the Android deployment process to copy the .so file into the users output build folder. This is the temporary solution for Android until this is fixed by the Qt Company. However, the process can still fail if the output folder has a space in it.
For WMSDynamicMapServiceLayer, only the URL property is exposed in QML. This allows you to display a WMS layer, but no other properties are available in this release.
For ArcGISImageServiceLayer, only the URL property is exposed in QML. This allows you to display an Image Service, but no other properties or methods are available in this release.
In some components, a JSON property is exposed. Only the setter works. The getter does not work. This is due to the C++ API not exposing a toJson method. In instances where JSON cannot be retrieved from the component, consult the C++ API reference for the corresponding QML API class to determine whether the toJson method is exposed.
The DynamicLayerInfo for individual layers in a service are not retrieved from the service. For example, attempting to obtain the DrawingInfo or TimeOptions (through dynamicLayerInfos) from an ArcGISDynamicMapServiceLayer will return null objects.
Setting credentials in identity manager on iOS fails silently unless ignoreSslErrors is true.
When using PortalDownloadItemData and specifying a responseFilename, the contents of the file are not always available when the status changes to Enums.PortalRequestStatusCompleted. This can happen when attempting to read file contents when handing the statusChanged signal (using FileFolder.readJsonFile. The workaround is to not to write a file via the API and instead use the responseText property then write to the output file.
The QML type Map emits a signal called extentChanged when the extent of the map is changed. The signal returns no parameters. This signal does not appear in the QML API doc.
LayerLegendInfo does not return valid legend information for FeatureLayer and ArcGISFeatureLayer. This will be fixed in a future release.
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Error when pushing a python app to bluemix
When I try cf push from local app dir, I get the following error, seems to be related to python buildpack.
Error:
`2016-03-31T21:08:07.00-0400 [STG/185] OUT -----> Downloaded app package (6.7M)
2016-03-31T21:08:07.98-0400 [STG/0] OUT -------> Buildpack version 1.5.1
2016-03-31T21:08:09.86-0400 [STG/0] OUT -----> Installing runtime (requests
2016-03-31T21:08:09.86-0400 [STG/0] OUT python-2.7.9)
2016-03-31T21:08:10.32-0400 [STG/0] OUT ! Resource https://lang-python.s3.amazonaws.com/cedar/runtimes/requests
2016-03-31T21:08:10.32-0400 [STG/0] OUT python-2.7.9.tar.gz is not provided by this buildpack. Please upgrade your buildpack to receive the latest resources.
2016-03-31T21:08:10.33-0400 [STG/0] OUT Staging failed: Buildpack compilation step failed
2016-03-31T21:08:10.33-0400 [STG/0] ERR
2016-03-31T21:08:12.29-0400 [API/3] ERR encountered error: App staging failed in the buildpack compile phase`
Here is my manifest.yml:
applications:
- services:
- dialog-pizza
- nlc_weather
- Retrieve and Rank-p4
path: .
memory: 128M
instances: 1
domain: mybluemix.net
name: jklab
host: jklab
disk_quota: 1024M
buildpack: python_buildpack
here is my runtime.txt
requests
python-2.7.9
Your runtime.txt file should have only the python version you want to use and you need to remove the requests word from it:
python-2.7.9
The error you are having is because the buildpack is trying to find a python version named requests python-2.7.9 and it does not exist.
Indeed, the line, "requests", belongs in the requirements.txt file.
@joe4k if this solves your issue please accept the answer
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Web scraping is a good process that uses software to mine and collects information that website and business owners can use to their advantage. This could be useful for your business, and if you plan to try it, you should consider using residential proxies, like Smartproxy, to help you avoid blocks. This guide will quickly help you with web scraping.
What Is Web Scraping?
Web scraping is a process that collects website content and data from the Internet. Once scraped, you can further store the data in a file, and the user can access it and use it however they choose.
It’s similar to the process of copying and pasting information from a website to a spreadsheet. Still, a web scraper can process information much faster and go through more details at a time.
Web scraping bots can scour through millions of content pages and find relevant data that your business or website can use. It can help you understand what content is already out there and can even help you learn a little about your own website’s security.
What Types of Data Can You Scrape?
Almost any data on a website is scrapable, but you don’t want to scrape everything. Because bots work so quickly, it’s a good idea to be specific about the type of data you want or need.
Also, this will save you time looking at information that isn’t relevant. It’s a good idea to think about what you want to learn from other websites and then choose the right type of data to scrape.
You can also choose to scrape information from specific websites or types of websites such as news sites or online stores.
What Is Web Scraping Used for?
Web scraping is beneficial for many reasons, but one of the most common things is its help in analysis. It can be precious for you to know a great deal about your competitors, their websites, and online business practices. If you are an online store owner, you may want to gather data from other online stores to determine what configurations are working for them.
If you would like to create a blog site in a specific niche, you may want to check out other blogs in that niche to see what content they’re creating and what’s getting the most views or traffic. Also, this will simplify it for you to make your website or business more successful and avoid the mistakes others are making.
How Does the Web Scraping Process Work?
Web scraping is a simple process, and once you understand how the bots work, you can completely automate it. If you’re going to learn the web scraping process, you will want to follow these steps successfully.
Choose the Website
Firstly, you will have to decide which websites you’d like to target. Your objective is to find data that’s useful and contains the information you need. Consider scraping sites that you compete with or that you would like to imitate.
Once you choose a site, you’ll want to see the nature of the backend code because this is where the information will be scraped from. You can do this by right-clicking on the page you’ve chosen and then clicking ‘inspect element’ or ‘view page source.’ The code will display.
Identify the Right Information
Once you find the backend code, you’ll need to identify the information that pertains to what you’re looking for. You’ll be able to see the information in the code. Brackets will likely surround it. If you aren’t familiar with coding, you may struggle with this aspect of scraping.
Add Code to Software
When you have found the proper code, you’ll need to copy it and add it to the scraping software. Also, this will allow the software to get all the information from the page or website.
The software will take some time to get all the information needed and store it in your chosen location. You can then access it at a convenient time and use it as you please.
Why Is Web Scraping a Good Idea?
Web scraping has many benefits ranging from learning more about your own website’s security to finding out what the competition is doing or what works for them.
You may want to attempt web scraping on your website and consider creating an aggregator website that does the web scraping for you and shares that information.
Many website owners use web scraping to help them create a better and more efficient site. You can learn a lot about your competition and your own site’s flaws by web scraping. If you think you could benefit from this efficient form of research, be sure to use residential proxies and find the right web scraping software.
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OpenVPN Site to Site - No pings
Morning all. I hope everyone is taking some time to remember our fallen hero's today.
The issue I have this morning, is the following.
I have a client that I am trying to setup a site to site openvpn connection with. Their setup is a PFSense box, behind an existing DD-WRT router. I have forwarded port 1194 from the DDWrt router (192.168.1.1), to the PFSense box (192.168.1.254). I have setup an OpenVPN site to site PreShared key connection. The VPN from my office, shows connected, and visa versa.
The problem I have, is that I cannot ping from my office to an endpoint within their office (from computers), however I can ping to endpoints in their office, from my PFSense box.
I have currently, two rules setup on each router. The WAN side, allowing OpenVPN ports from any source, to any destination, and then I have an OpenVPN rule, allowing any traffic, on any protocol, to any destination. This is duplicated on each side of the VPN.
From everything I've seen online, this should be working. However, I cannot RDP into machines through the VPN, and I cannot ping endpoints across the Tunnel from my mac/windows machines.
I dont have any "Push" records in the advanced tabs on either side. Not sure if thats really needed?
Any help would be appreciated!
Mutual access over a site-to-site vpn connection only works without further tuning, if both sites, the server and the client, are the default gateways on the hosts you want to reach.
If they aren't you have to add routes or do NAT to get it working.
SO without getting to confusing (or trying not to).
I'd have to setup custom routes on primarily the PFSense box at the customers, that is currently behind an existing router (gateway). I've just started messing with that.
What I've done, is changed the OpenVPN to listen on the LAN interface. Made my changes to the firewall rules allowing that traffic now through LAN instead of WAN. I've also made the appropriate IP changes in the active DD-WRT router/gateway. After having done that, I've now gone through to the "Routing", and changed the current default gateway to LAN, which points to the DD-Wrt box. Then I've gone in to "Routing-Static Routes" and entered Destination network 10.0.10.0/24 to go through the GW pointed to DD-WRT and saved that. Rebooted. Still the same thing.
I'm assuming that the destination network needs to be the actual destination, and not the tunnel, correct?
I've probably muddied this whole thing up. I hope what I've said makes sense.
Thanks again for looking at this.
Yup, that did it.
I went ahead and added a static route to both PFSense boxes, forcing their destination network through the appropriate GW. At least right now, My office can ping and hit endpoints on the clients side. I cannot yet ping my office from the clients side. That may be due to a pending reboot though.
For whatever reason, that seems redundant to me. But I guess you're saying that if the PFSense box is behind another router, then that sort of thing needs to happen? Otherwise if both boxes were up against the public IP/modem, that static routing would not need to occur?
Thanks again for a nudge in the right direction.
Now to clean up my mess, and work on DNS passing through.
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# Copyright 2017 The dm_control Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ============================================================================
"""Misc helper functions needed by autowrap.py."""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
import collections
import keyword
import re
import six
from six.moves import builtins
_MJXMACRO_SUFFIX = "_POINTERS"
_PYTHON_RESERVED_KEYWORDS = set(keyword.kwlist + dir(builtins))
if not six.PY2:
_PYTHON_RESERVED_KEYWORDS.add("buffer")
class Indenter(object):
r"""Callable context manager for tracking string indentation levels.
Args:
level: The initial indentation level.
indent_str: The string used to indent each line.
Example usage:
```python
idt = Indenter()
s = idt("level 0\n")
with idt:
s += idt("level 1\n")
with idt:
s += idt("level 2\n")
s += idt("level 1 again\n")
s += idt("back to level 0\n")
print(s)
```
"""
def __init__(self, level=0, indent_str=" "):
self.indent_str = indent_str
self.level = level
def __enter__(self):
self.level += 1
return self
def __exit__(self, type_, value, traceback):
self.level -= 1
def __call__(self, string):
return indent(string, self.level, self.indent_str)
def indent(s, n=1, indent_str=" "):
"""Inserts `n * indent_str` at the start of each non-empty line in `s`."""
p = n * indent_str
return "".join((p + l) if l.lstrip() else l for l in s.splitlines(True))
class UniqueOrderedDict(collections.OrderedDict):
"""Subclass of `OrderedDict` that enforces the uniqueness of keys."""
def __setitem__(self, k, v):
if k in self:
raise ValueError("Key '{}' already exists.".format(k))
super(UniqueOrderedDict, self).__setitem__(k, v)
def macro_struct_name(name, suffix=None):
"""Converts mjxmacro struct names, e.g. "MJDATA_POINTERS" to "mjdata"."""
if suffix is None:
suffix = _MJXMACRO_SUFFIX
return name[:-len(suffix)].lower()
def is_macro_pointer(name):
"""Returns True if the mjxmacro struct name contains pointer sizes."""
return name.endswith(_MJXMACRO_SUFFIX)
def mangle_varname(s):
"""Append underscores to ensure that `s` is not a reserved Python keyword."""
while s in _PYTHON_RESERVED_KEYWORDS:
s += "_"
return s
def mangle_struct_typename(s):
"""Strip leading underscores and make uppercase."""
return s.lstrip("_").upper()
def mangle_comment(s):
"""Strip extraneous whitespace, add full-stops at end of each line."""
if not isinstance(s, six.string_types):
return "\n".join(mangle_comment(line) for line in s)
elif not s:
return "<no header comment found>."
else:
out = "\n".join(" ".join(line.split()) for line in s.splitlines())
if not out.endswith("."):
out += "."
return out
def camel_case(s):
"""Convert a snake_case string (maybe with lowerCaseFirst) to CamelCase."""
tokens = re.sub(r"([A-Z])", r" \1", s.replace("_", " ")).split()
return "".join(w.title() for w in tokens)
def try_coerce_to_num(s, try_types=(int, float)):
"""Try to coerce string to Python numeric type, return None if empty."""
if not s:
return None
for try_type in try_types:
try:
return try_type(s.rstrip("UuFf"))
except (ValueError, AttributeError):
continue
return s
def recursive_dict_lookup(key, try_dict, max_depth=10):
"""Recursively map dictionary keys to values."""
if max_depth < 0:
raise KeyError("Maximum recursion depth exceeded")
while key in try_dict:
key = try_dict[key]
return recursive_dict_lookup(key, try_dict, max_depth - 1)
return key
def comment_line(string, width=79, fill_char="-"):
"""Wraps `string` in a padded comment line."""
return "# {0:{2}^{1}}\n".format(string, width - 2, fill_char)
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STACK_EDU
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There are many ways to save your Roblox game. You can use the Save button in the upper-right corner of the Roblox game window, or use the dedicated Save function in the File menu. You can also use the Quick Save keyboard shortcut, which is Shift+S by default. All of these methods will save your game automatically.
There is no one-size-fits-all answer to this question, as the method you use to save your Roblox game will vary depending on the game itself. However, some tips on how to save your Roblox game include:
– Use the in-game save feature: This is the easiest way to save your game, as it will automatically save your progress in the background.
– Use a third-party service: There are many websites and services that offer backup and save features for Roblox games.
– Export your game data: You can export your game data from Roblox and then import it into another game file. This is a good way to create a backup of your progress.
Why can’t I save my Roblox game?
This is true! You can’t save anything to Roblox if it hasn’t been published to Roblox. This is because Roblox doesn’t allow you to save anything that isn’t published.
So we click on file up here in the corner And then you wanna click on save to roblox as okay so
Does Roblox auto save
Roblox Studio’s ‘autosave’ feature is a great way to make sure your work is always saved. You can access it by clicking on File < Advanced < Open Autosaves. Usually Studio also prompts you on the fact you have an autosave when you open studio. If you delete the ROBLOX app, your account will still exist, but it will not be saved to your device’s RAM or automatically log you in.
How do I save my game progress?
If your game autosaves, you can sync your game data and pick up where you left off. If you get a new Android phone, to restore game progress, sign in to the same account you used before.
Once you have got a unique style you want to save, go back to the main menu and click on the “Customize look” option. From there, you can change the color scheme, font size, and other aspects of the site’s appearance.
What does save to Roblox do?
When you save to Roblox, your progress is saved without it being publicly accessible. When you publish to Roblox, your progress is saved and made available to play. Publishing is the preferred method for saving your progress on Roblox.
Roblox may timeout your game datastores if too many requests are sent every 5 minutes. To avoid this, it is recommended that you limit the number of requests sent during this time period.
Does Roblox record your gameplay
Roblox is a online game that allows you to players to play games, create games, and socialize. In order to access the Roblox settings, you need to press on the Roblox logo icon. This will bring up the settings bar on the left hand side.
Auto saver is a very useful tool to have in The Backrooms. It automatically saves your game every nighttime, which can be very helpful in case you forget to save or your game crashes. To get this in The Backrooms, you need to find an NPC, who is sitting on a carpet with a laptop.
Does deleting a game delete save?
Deleting the game will only delete the application. It will still retain all the saved data (ie your progress). So if you ever reinstall the game you will be able to pick up where you left off.
Make sure to log out of your account properly and to save your game progress before you exit the game. If you don’t, you may lose your progress and will have to start from the beginning again.
How long till Roblox deletes your account
It can take up to 2-3 days for an account to be deleted in Roblox. During this time, you can contact customer support to cancel your deletion request if needed.
AppData\LocalLow is the default location for most save games on Windows. You can access it by opening File Explorer and navigating to the “%homepath%\AppData\LocalLow” folder. You can also paste the file path into the address bar in your file explorer.
What was the first game to save?
Legend of Zelda is a well-known video game that includes the ability to save, which was groundbreaking at the time. This savedata feature allows players to save their progress in the game, and continue from where they left off at a later time. This was a major boon for gamers, as it allowed for much more convenient gameplay.
Space Invaders is a 1978 shoot ’em up video game developed by Taito. The player controls a spaceship that moves horizontally across the bottom of the screen, firing at an armada of aliens that march down from the top of the screen. If the player’s ship is hit by an alien’s shot, it will explode and the player will lose a life. The player starts with three lives, and can earn more lives by clearing waves of aliens. The game ends if the player’s ship is destroyed, or if the aliens reach the bottom of the screen.
The game was an instant hit, and by the early 1980s, it was one of the most popular arcade games of all time. The game’s popularity inspired a number of imitators, such as Atari’s 1980 game Asteroids. Space Invaders was eventually ported to a number of home consoles and computers, and spawned a number of sequels and spin-offs.
Can I save my house in Roblox
ServerStorage can be used to store houses in a game. Each house can be given a unique name and placed in a folder. When the player leaves, the name of the house he owns can be saved.
This is a Beta feature and subject to change. Your feedback is appreciated.
Ctrl+S (Cmd+S in Mac) saves the current place to the last saved location.
If you edit a place that was last saved to Roblox Cloud, then Ctrl+S will save the place back to Roblox Cloud.
If you edit a place that was last saved to your local file system, then Ctrl+S will save the place back to the same file.
There is no one-size-fits-all answer to this question, as the best way to save your Roblox game may vary depending on the game and your individual playing style. However, some tips on how to save your Roblox game may include regularly backing up your game data, using an in-game save feature if available, or taking advantage of any cloud saving options that may be offered by the game.
There are a few things you can do to save your Roblox game. First, make sure you have a backup of your game files. Next, consider using a cloud storage service to save your game. Finally, if you have any sensitive data in your game, make sure to encrypt it.
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OPCFW_CODE
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In this article you will learn how to get free website hosting in 2021 using different platforms online. I will explain step by step about each platform and I will also tell you about the best options according to your needs. And, keep one thing in mind that the resources mentioned below are not the only resources but these are the ones I use and will be telling you about. So, without wasting time let’s get into it.
Why do you need a free web hosting?
In your development career you might come across to a point where you need to test your site’s performance online and check if it is working fine on the internet. You may want to test the website for yourself or maybe you are a freelancer and you want to show your website to a client as a working demo, this article covers everything.
Now, to host your website there are a couple of options, they all provide different features and services and you can select the platform according to your needs. Here is the list of all the platforms I use for free website hosting and will be covering in this article:
Free website hosting using Heroku.com
It is one of the platforms that offer free website hosting. This platform is great for beginners who want to test their websites on the internet. It is simple and provides many options to manage your site. It also provides collaboration to github, which means that users can directly update their website as soon as they commit their code on their github repository.
How to use it?
First of all you have to create an account on heroku. If you already have an account then you can sign in directly. In the heroku dashboard click on the “create a new app” button. Fill in the necessary details and make to download the heroku cli from their website.
After that you have to open up your terminal or command prompt and type the following command.
This will take you to the Heroku’s website’s login page, go ahead and fill your login credentials and hit sign in. Then you can go back to your command prompt or terminal and type the following commands one by one.
git init git create heroku mywebsite git add . git commit –am “first commit” git push origin master
Note if you have an html app then you have to make a separate PHP file in your root directory and type the following code in that file.
<?php header(“Location: index.html”);
You have to provide the location of the index.html file in the header function in php.
Free website hosting using Infinityfree.net
This service provides free domain and database support along with free website hosting, it has a cpanel in it and you can easily modify your website. Just register yourself to infinity free and you will be good to go.
If you have registered yourself then you can proceed to the domain section. You can use a free subdomain or a custom domain it is up to you.
Free website hosting using Netlify.com
This is one of the easiest ways to get free website hosting. Like heroku this service also provide collaboration with github and some other repository hosting services. Moreover, it also has a pretty good user experience and user interface.
Note that this service is only useful if you have a static website and you might have to purchase some other services to be able to host a dynamic website that has backend in it.
There are three ways to host a website on netlify:
- Drag and drop files from your device
- Use git
- Use CLI
Deployment using netlify CLI
First of all you have to make sure you have npm installed in your device. To check that open your command line and type the following command:
If you have npm installed then you will see a version number otherwise you will see an error message that says:
After that first of all go to the root directory of your project by using “cd [directoryname]” in command line now you have to type the following commands:
npm install netlify-cli npm deploy
And your site will be deployed to netlify and you can visit it by the url given in the command line.
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OPCFW_CODE
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Infra doesn't build from new init.
Describe the bug
When starting a run from no bucket and creating a bucket with a new name, you can not create infra.
Error message:
Error: Failed to get existing workspaces: S3 bucket does not exist.
To Reproduce
from host, delete simulator yaml.
$simulator init
$simulator infra create
related to pull request #96
rm -R terraform/deployments/AWS/.terraform
fixes short term
When I following your instruction above I get the following
launch@launch:/app$ simulator init
panic: Error reading config file: Config File "simulator" Not Found in "[/home/launch/.kubesim]"
goroutine 1 [running]:
github.com/controlplaneio/simulator-standalone/cmd.initConfig()
/go/src/github.com/controlplaneio/simulator-standalone/cmd/root.go:75 +0x24d
github.com/spf13/cobra.(*Command).preRun(0xc0002e6280)
/home/build/go/pkg/mod/github.com/spf13/cobra@v0.0.5/command.go:856 +0x49
github.com/spf13/cobra.(*Command).execute(0xc0002e6280, 0x11a7ce8, 0x0, 0x0, 0xc0002e6280, 0x11a7ce8)
/home/build/go/pkg/mod/github.com/spf13/cobra@v0.0.5/command.go:792 +0x148
github.com/spf13/cobra.(*Command).ExecuteC(0x11819a0, 0xc0002e7400, 0xc0002e6c80, 0xc0002e6500)
/home/build/go/pkg/mod/github.com/spf13/cobra@v0.0.5/command.go:914 +0x2f8
github.com/spf13/cobra.(*Command).Execute(0x11819a0, 0x0, 0xc000205f58)
/home/build/go/pkg/mod/github.com/spf13/cobra@v0.0.5/command.go:864 +0x2b
github.com/controlplaneio/simulator-standalone/cmd.Execute(0xb, 0xbab7df)
/go/src/github.com/controlplaneio/simulator-standalone/cmd/root.go:109 +0x27
main.main()
/go/src/github.com/controlplaneio/simulator-standalone/main.go:13 +0x26
launch@launch:/app$
Which I would expect as the simulator.yaml no longer exists.
I think you reproduction instructions are not correct.
If I run the following I can't reproduce the error:
In terminal 1
cat /dev/null > ~/.kubesim/simulator.yaml
In terminal 2
simulator init
[enter unique bucket to create]
simulator infra create
All works as expected
Got this error now when deleting the simulator.yaml file before running make run
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GITHUB_ARCHIVE
|
Define a conceptual model of the data you want to convert.
For example with CSV files or relational databases tables, most of the time:
- each file/table represents a class (aka. type),
- each row is an entity,
- each column is a property of this entity
If you create a diagram for your conceptual model, we encourage you to add an image of it in the
model folder of your repository.
Depending on what you are trying to achieve you might not need to use the same tools. If you want to build a complete OWL ontology, then a specialized tool like Protege would be more suited.
If you just want to define a schema with only a few classes and properties, then your favorite drawing tool will be probably enough. A popular tool used for defining data model is Diagram.io (previously yed and draw.io). There is also the Graffoo tool to generate an ontology from your Diagram.io diagram.
Here is a non-exhaustive list of tools specialized to define data models:
- Protege is the most popular and mature tool to build OWL ontologies. It is available as Desktop version and Web version (the desktop version has more functionalities)
- Gra.fo is a commercial website that will allow you to define your model using a nice graphical interface with nodes and edges. It can be useful for small simple models, but will require you to pay to unlock advanced features.
You will need to define the class and relations for the properties in your data. The easiest way is to find classes and properties in existing model (aka. ontologies). Some properties are standard like
rdfs:label, but for more specific concepts the best is to find an existing data model matching your model.
📝 Write an example RDF entity in the turtle format for each class you expect to create. Put the file(s) in the
You can search for relevant concepts in existing models in ontology repositories:
- Linked Open Vocabulary (LOV) for generic ontologies
- BioPortal for biomedical concepts by the NCBI 🇺🇸
- OntologyLookupService for biomedical concepts by the EBI 🇪🇺
- AgroPortal for agronomy by INRIA 🌾
- EcoPortal for ecology by Life Watch Italy
- Bartoc.org for social science and digital humanities
Here is a list of popular ontologies for generic or biomedical concepts:
- Semanticscience Integrated Ontology (SIO), a simple, integrated ontology of types and relations for rich description of objects, processes and their attributes.
- BioLink Model, A high level datamodel of biological entities (genes, diseases, phenotypes, pathways, individuals, substances, etc) and their associations.
- Schema.org, a collaborative project to define schemes for structured data on the Internet, on web pages, in email messages, and beyond.
- Various classes described such as schema:Person, schema:MedicalGuideline, schema:Review, schema:ScholarlyArticle, schema:MedicalScholarlyArticle, schema:Dataset, etc.
- Extensions available, such as BioSchemas for biological data
- Alternatively you can look into Google Data Types, which are mainly built from schema.org and allow to describe and index your website using RDF (JSON-LD)
- DublinCore (dc, dct, dctypes), one of the most generic vocabulary (includes properties such as
- PAV: Provenance, Authoring and Versioning ontology
- PROV: The Provenance Ontology, another ontology to describe provenance more in detail
- DCAT: Data Catalog Vocabulary, to describe datasets
- NCIT: National Cancer Institute Thesaurus, a vocabulary for clinical care, translational and basic research, and public information and administrative activities.
📝 Write a SHACL or ShEx shape file describing exactly the model (classes and properties) you expect to use in the
model folder. This will be used later for validating the created KG.
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OPCFW_CODE
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Hello. Welcome to this tutorial. From today I am going to guide you to start computer programming. So, these tutorials are for beginners who are interested in computer programming and just don’t know how to start programming. So, I will try to guide you about that matter. In this post, I will try to discuss with you how to ger started in programming as a beginner.
What Is Computer Programming Actually Meant?
Programming means creating a program or software using any of the programming languages to perform a specific task without any error. This is the programmer’s responsibility to ensure that his code is accurate and fills the conditions and works perfectly. For a better understanding of what is programming, you can read my previous articles. To read that article Click here.
Coding vs Programming Comparison:
When anybody starts learning about coding and programming they thought that coding and programming are actually the same things. They also find sometimes coding and programmings are synonyms for each other. However, there is a basic difference between coding and programming. Yes, coding is a main branch of programming without which you can’t be a programmer. But they are not exactly 100% the same. Coding means converting one language to another. Actually, this code works as a decoder. This code converts human language to machine-understandable language. But programming means writing a program with the help of code of a particular language to perform a specific task. So, I hope it is clear that coding is an important branch of programming but they are not the same.
What Are The Materials That Are Needed To Start Programming?
To start programming you must need the following things:
- Passion(This is the main thing you must have).
- A computer
- Knowledge about any of the programming language
- A compiler.
- A water bottle😉.
I’ve mentioned passion in the top position. Because to be a programmer you must be an addiction to programming instead of a drug. Without this, you will not enjoy your programming career and will not go to be a programmer.
Then you obviously need to have a laptop or desktop for coding. This laptop is suggested with the configuration minimum core i5 or equivalent processor, 4 GB ram, 500 GB hard disk, and 1GB graphics card. Minimum these configurations your computer must have from my suggestion.
Then knowledge about any programming language. You must choose 1 programming language for programming I will explain it later. Then compiler. You must have a compiler that can perfectly compile your code. There are plenty of compilers available for any of the programming languages just install them and start coding using them.
Lastly, I mentioned the water bottle. Because when you start programming you will feel high pressure in your brain for difficult problems then you will feel thirsty and you have to drink water. This is so funny right that I am telling you about water bottles being a part of elements needed for programming. Now you thought that is funny but start programming then you will find that is it funny or true. Because in a programmer’s life water bottle and computer is his most close and also a best friend.
What Are The Programming Languages?
Which Language You Should Choose To Start Your Programming Career?
Well, it actually depends on which field you want to start your programming career.
1st of all I divide programmers into 2 classes one is a website developer and the other is a software developer.
In both fields, there is an opportunity for you to become a front end, back end, full-stack, or any other developer.
But you shouldn’t start learning all of the languages of a particular field at the same time. 1st start learning one language. And learn this language in detail with all of the basic things, structures, and syntax. When you expert on this language then shift to other languages.
How Should A Beginner Start Programming?
To start programming first you must learn the basic structure of a particular language. Don’t go to learn multiple languages at the same time. Learn only one specific language structure and basic part of that language. Then start learning syntax and functions. Then start practicing on online platforms available for coding practice. Don’t worry on this website you will find a series of tutorials about computer programming for beginners just follow them step by step.
How Do I Practice Coding?
There are plenty of ways to practice coding. But the best way to practice codding is to solve problems using your known programming language on any of the codding online platforms. Some famous websites for practicing codding are Codeforces, HackerEarth, Codechef, UVA online judge, etc.
You can start codding practice using any of the above sites. Just start solving the problems from the beginner level.
My Plane To Guide You In Your Programming Career:
I am a software developer so I will guide you to become a software developer. So, my next tutorials will be for people who want to start their career in software development. However, to do so I will start with C language and then shift to C++ and at last Python. At first, I will try to teach you the basic structure, syntax, and other things about the C language. Then when you completely learned them. I will guide you to start problem-solving on some virtual online judge platforms. Then I will shift you to C++. And lastly, I will try to teach you the basic structure of Python.
Most importantly i will try to teach you Object Oriented Programming using C++. Which is the most valuable and must needed thing to become a software engineer.
Some Advice From My Own Programming Experience
My self Anthor Kumar Das from Bangladesh. I am now reading Bachelor’s Science Degree at Khulna University of Engineering And Technology. However still now I am not a pro-level programmer. I am learning programming science in January 2019. I will try to share with you what I have learned in these certain years of period. In these years, I have wasted so much time by doing the worst things instead of programming. Which is very much harmful to my programming career. And also that makes a huge impact on my career. Because the person who started programming with me also even later than me is currently at a very much higher level than me. The most reason for my failure is most of the time I was sick. Then after coding for a few days I don’t get any motivation and felt bored with programming that’s why I detach myself from programming for a few days. Again most of the time I was depressed due to my failure. By these, I have wasted plenty of time instead of programming. I realized my mistakes in august 2020 and then till now I am trying to give my best effort in programming. I am not only the person who feels bored in programming or becomes depressed. It can also happen to you too.
So, I suggest you don’t lose hope. Be passionate and dedicated to programming and try to give your best effort. One day you will be one of the best programmers.
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OPCFW_CODE
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Project Home • Screenshots • Contact Project
This code generator goes steps further in the automatic creation of CRUD functionality. In addition to the standard Bean, DAO, and Gateway most generators create, this generator will also create a controller, HTML data table or CF8 data grid and a form with multiple add, update and delete functionality, integrated form validation for required fields, optional rich text area and integrated date chooser. An Actionscript Value Object and Flex CRUD MXML Component can also be generated. Other options include the use of graphics or textual links in the HTML code and the ability to automatically write files (and graphics if chosen) to the file system (except for VO and MXML).
This code generator rocks. I have been looking for a well built generator with an intuitive and feature-packed wizard that will create well formed code, and tons of it. It has already saved me a great deal of time, and has even taught me a bit about OO.
*Added 10/16/08: overall site design and the ability to have the generator write files directly to the file system
*Added 10/19/08: ability to have files placed into an admin folder
* Fixed 10/21/08: passwordField error, CF8 data grid update and delete issues, and password validation not working
* Added 10/21/08: version number to the header
* Fixed 10/31/08: admin parameter not being passed back when changing table settings
* Added 12/2/08: confirmation and error reporting after insert, update or delete on data table (or grid) page
* Added 12/2/08: ability to specify path of UI scripts (data table/grid, form, controller and application file if used)
* Added 12/2/08: date fields in CF8 applications now use the type="datefield" attribute vs external js
* Fixed 12/6/08: forms on application and table settings pages now hold original values when navigated to using links
* Added 12/6/08: ability to generate Actionscript Value Object and MXML CRUD Component (Beta Code - still in testing. Released due to request)
*Fixed 07/25/09: Extra white space in the generated files has been removed for easier readability.
*Fixed 07/25/09: Order By logic has been fixed so it works.
*Fixed 07/25/09: Consistent use of Application.dsn has been implemented when using the Application.cfc.
* Fixed 07/27/09: CFGRID in HTML had an error in the delete function since it was not using the ID field from the table, but just ID.
Demonstration video can be found on project page at http://www.jasonpresley.net/codegenerator.cfm.
Adobe and the Adobe product names are either registered trademarks or trademarks of Adobe Systems Incorporated in the United States and/or other countries.
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OPCFW_CODE
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Canon EF 16-35 f/2.8 prime vs. 50mm f/1.2 lens for bokeh/dreamy effect?
I'm looking into camera lenses and have seen two referenced as what certain bloggers use to take a certain kind of light-filled "perfectly overexposed" strong-bokeh picture that I am partial to, like this:
My question is, if I'm going to be shooting at a large aperture (let's say f/2.8) on either lens, is there a noticeable difference between what the resulting images will be? Is it ultimately a question of just prime vs. zoom lens?
Photo by Alix (Flickr)
Here's another image that I like that was taken on a Leica Summilux 50mm f/1.4 that's far too expensive, but can give you another idea of the look I like. Not quite as sunny, but still the vivid yet light-filled/faint look I like, for reference. Like in the kind of angelic glow around the skin and the saturation of the parakeet.
Photo by Steve Huff (stevehuffphoto.com)
You're not going to be shooting at f/2 with the EF 16-35mm f/2.8 L II. But I doubt your example was taken at anything approaching f/2. Maybe f/2.8, but looks more like a narrower aperture at a longer focal length.
That was supposed to read 2.8. Editing now.
A minor point is that the EF 16-35mm f/2.8 is of course a zoom, not a prime. The 50mm is a prime (i.e. fixed focal length) lens.
Yes, see my full question ;)
These two examples are almost polar opposites in terms of color accuracy, exposure to the right or left, contrast, where the focus is centered, etc. What particular quality about both these images catches your eye?
related: http://photo.stackexchange.com/questions/48435/other-than-speed-and-weight-what-advantages-might-a-prime-lens-have-over-a-zoom
Nd http://photo.stackexchange.com/questions/11571/would-a-prime-be-redundant-with-a-fast-zoom
That's like high key vs. low key.
The thing I like that they share is the glowingness and the color balance. Both have extremely vivid colors only in the right places (the ducks, the parrot), while the skin remains soft and pale and also seems to glow. I feel like they're opposite, in the same way. Like if one is high-key and one is low-key, it's the same effect, just taken in different lighting contexts. If you look at the full Flickr of the photographer of the first photo, you'll see the kind of glowy effect is the same for her in dark shots as her light ones: https://www.flickr.com/photos/26959633@N05/
I'm not sure I understand what you mean by "glowy". I just don't see it. The second example is properly exposed and the detail in the skin is visible. Not what I would call "glowing". As for Alix's Flickr stream, her normally colored stuff doesn't seem to "glow" to me either. And while I hesitate to judge her work on so few examples (I'd hate to be judged based on my Flickr stream, which I rarely use unless someone requests the ability to access an image via Flickr), it seems to me that when she has good composition she uses straight WB. When the composition isn't very good she uses...(Cont.)
(Cont.)... crazy color casts to try and make it interesting. (Kind of like 95% of all of the photos on Instagram.) Just my 2¢.
The dreamy effect in the first is caused by overexposure of many of the highlights including a lot of the subject's skin, an intentional (at least let's hope it is intentional!) color cast, and a center of focus past where we should expect it to be. The focus is centered somewhere between the model's knees and the foremost green and blue ducks in the nearest water channel. Or maybe it just looks that way because the fine details are overexposed out of everything else anywhere close to the subject distance. The depth of field is not exactly extremely shallow in this one.
The second image is exposed to make the skin tones look realistic, the color is very neutral and natural in terms of temperature, and the focus is squarely centered on the eye of the nearest bird which is also almost the same distance of the ring on the human's hand. The only thing I can see that is remotely "dreamy" about it is the very shallow depth of field.
The one thing I see in common between these two images is that both use color to go a long way towards setting the mood. But the mood each sets is totally different to my eyes.
In the context of the endless possibilities regarding color afforded by raw digital images how does the color mood you wish to create relate to lens choice? The answer is it pretty much doesn't.
Back when color temperature/white balance choices were limited by available films and standard filter colors a "warm" or "cool" lens could have a real effect on the final image with which you wound up. But color casts caused by lenses, as well as differences in contrast (within the reasonable limits of the lens' ability to resist veiling flare) are easily correctable in post and you can now make photos taken with any lens you choose look any way you wish in terms of color and contrast.
I'm looking into camera lenses and have seen two referenced as what certain bloggers use to take a certain kind of light-filled "perfectly overexposed" strong-bokeh picture that I am partial to
The lenses you mention have excellent reputations and price tags to match, but you can shoot photos in that same light-filled, low depth of field style with less expensive lenses. For example, Canon makes the EF 35mm f/2 that obviously has an even larger max aperture (and therefore blurrier foreground and background) than the EF 16-35 f/2.8, but the price is $600 instead of $1500.
Consider your first example. There's lots of light on the woman's back and on the background behind her. She's facing away from the light, but there's still plenty of light on her face, so there must be something outside the scene that's providing light. That could be a flash, but more likely it's a reflector or just a big light-colored wall that's bouncing some of that bright light back at her. The photographer made sure that her face was properly exposed, which let everything in direct sunlight be somewhat overexposed, and the aperture was selected to provide the desired amount of blur in the background. You can take that shot with a built-like-a-tank L lens that's outstanding in every way (weatherproof, too!), or you can take that shot with a more affordable lens that's still very good optically. But here's the thing: just using the L lens won't make your photos look like the example. The lighting is what's really important in getting that bright look that you're after.
if I'm going to be shooting at a large aperture (let's say f/2.8) on either lens, is there a noticeable difference between what the resulting images will be?
Well, you're talking about two different lenses with different apertures and focal lengths, so yes, there's going to be a noticeable difference between them. Longer focal length means narrower angle of view. Let's say you take a photo with each lens where the subject fills the frame. The shot with the wider lens (i.e. shorter focal length) will include more of the background.
Is it ultimately a question of just prime vs. zoom lens?
Prime lenses are simpler, with fewer elements, so they tend to be sharper and less expensive than zooms, and they tend to have larger apertures. But the differences you seem to be concerned with have more to do with focal length and aperture than anything else.
Zoom vs. prime is entirely meaningless.
It's ultimately a question of absolute aperture (aka exit pupil) in mm. Divide focal length by wide-open f-stop. Bigger numbers are dreamier.
And yeah, longer lenses mean dreamier defocusier backgrounds. But that 200/2 is probably out of your price range :-)
You should also consider looking at some of the new Sigma "Art" series lenses. They have been comparing very well against Canon's lenses (the Sigma 24mm F1.4 Art took the 2015 TIPA award for "Best Expert DSLR Prime Lens" and the 35mm F1.4 Art won the same award for 2013) and their pricing is downright reasonable compared to Canon's L lenses
I have a 18-35mm F1.8 Art from Sigma and it is an outstanding lens if you're shooting with a crop sensor body
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Various commits chopped off from PR 1881
PR 1881 stuck in a permanent review state, so I chopped off some commits that I need for other PRs. Comments for those commits are on the PR 1881 page. Please merge, so I can continue creating other PRs, otherwise I am blocked.
The getSizeInBytes doesn't seem very documented and is not tested.
what else could I say?
/// The size of the Transaction object
public ulong sizeInBytes() const nothrow pure @safe @nogc
and is not tested.
if someone adds a new field to the Transaction object and forget to change the sizeInBytes method, then I will not be able to catch that with unit tests. If someone removes a field, and forget the change the sizeInBytes method, he will receive a compile error. I can add a unit test that calculates the size and then I canculate it on paper and compare... But I already have done that.
Additionally, I think we should limit it to the Transaction module to avoid contaminating all data structures.
do you mean use package modifier on the sizeInBytes() method? I am going to use that method in Fee for example and that is not in the same package
thanks for the review @Geod24, @linked0 I fixed everything, and still have 1 pending question: https://github.com/bosagora/agora/pull/1955#issuecomment-820846559
if you are okay with my answer, then this could be merged
This triggers a (valid) assert:
#### FATAL ERROR:
This node was started at source/agora/test/Flash.d:528
This most likely means that the node crashed due to an uncaught exception
If not, please file a bug at https://github.com/Geod24/localrest/
Full error: core.exception.AssertError@source/agora/common/Amount.d(341)
----------------
runtime.d:815 [0x563497768a4b]
runtime.d:774 [0x563497768273]
dmain2.d:292 [0x56349777bf00]
deh.d:46 [0x5634977b226f]
dwarfeh.d:332 [0x56349777cb02]
/home/runner/work/agora/agora/source/agora/test/Base.d:140 [0x563496f089b1]
exception.d:430 [0x56349776773f]
exception.d:595 [0x563497767c24]
/home/runner/work/agora/agora/source/agora/common/Amount.d:341 [0x563496e06413]
/home/runner/work/agora/agora/source/agora/consensus/Fee.d:329 [0x5634973bcfdc]
/opt/hostedtoolcache/dc/ldc2-1.25.0/x64/ldc2-1.25.0-linux-x86_64/bin/../import/std/algorithm/iteration.d:1026 [0x5634973bac9c]
/home/runner/work/agora/agora/source/agora/consensus/Fee.d:329 [0x563496fdc189]
/home/runner/work/agora/agora/source/agora/node/Ledger.d:620 [0x563496eb000e]
/home/runner/work/agora/agora/source/agora/node/Ledger.d:1173 [0x563496f0aef3]
/home/runner/work/agora/agora/source/agora/test/Base.d:478 [0x563496e63651]
This triggers a (valid) assert:
#### FATAL ERROR:
This node was started at source/agora/test/Flash.d:528
This most likely means that the node crashed due to an uncaught exception
If not, please file a bug at https://github.com/Geod24/localrest/
Full error: core.exception.AssertError@source/agora/common/Amount.d(341)
----------------
runtime.d:815 [0x563497768a4b]
runtime.d:774 [0x563497768273]
dmain2.d:292 [0x56349777bf00]
deh.d:46 [0x5634977b226f]
dwarfeh.d:332 [0x56349777cb02]
/home/runner/work/agora/agora/source/agora/test/Base.d:140 [0x563496f089b1]
exception.d:430 [0x56349776773f]
exception.d:595 [0x563497767c24]
/home/runner/work/agora/agora/source/agora/common/Amount.d:341 [0x563496e06413]
/home/runner/work/agora/agora/source/agora/consensus/Fee.d:329 [0x5634973bcfdc]
/opt/hostedtoolcache/dc/ldc2-1.25.0/x64/ldc2-1.25.0-linux-x86_64/bin/../import/std/algorithm/iteration.d:1026 [0x5634973bac9c]
/home/runner/work/agora/agora/source/agora/consensus/Fee.d:329 [0x563496fdc189]
/home/runner/work/agora/agora/source/agora/node/Ledger.d:620 [0x563496eb000e]
/home/runner/work/agora/agora/source/agora/node/Ledger.d:1173 [0x563496f0aef3]
/home/runner/work/agora/agora/source/agora/test/Base.d:478 [0x563496e63651]
fixed, anything else needed before this PR can be merged? It is blocking #1917
The last commit should be fixuped to the third one, I think.
Needs a rebase but g2g
rebased and also prefixed everything with 'this'...
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VANCOUVER, British Columbia – February 11, 2003 – ActiveState, the leader in applied open source, today announced the release of PerlASPX 1.0. ActiveState PerlASPX enables professional Perl programmers to use Perl for dynamic content generation on Microsoft ASP.NET Web servers. Built on the Microsoft .NET Framework, PerlASPX adds Perl to the list of supported languages for ASP.NET enabled Web servers. PerlASPX leverages the power of ActiveState PerlNET to deliver a flexible option for programmers who prefer Perl for its powerful text processing capabilities, or have legacy Perl code. PerlASPX also enables programmers to create ASP.NET-hosted XML Web services in Perl. Active Server Pages (ASP) has long been the foundation for creating rich and dynamic Web sites using server-side scripting. Microsoft ASP.NET enables developers to access any of the programmatic interfaces exposed by the .NET Framework, and to construct server-side code using any of the languages that are compatible with the Framework.
"ActiveState's extensive experience in bringing Perl to the Microsoft platform makes them especially qualified for the task of porting Perl to ASP.NET," said John Montgomery, director for the Developer and Platform Evangelism Division at Microsoft Corp. "PerlASPX is an excellent combination of Perl's text processing power with the popularity of ASP's server-side scripting environment for the creation of interactive Web pages and building powerful .NET Framework applications for the Web."
- Use Perl for dynamic content on Microsoft ASP.NET Web servers
- Easily create XML Web services using Perl
- Keep existing investment in Perl code on ASP.NET
"I am excited that I can use Perl while taking advantage of all the features of the .NET Framework, such as code behind, page compiling and page caching," said Matthew Schaffner, Traders' Library. "PerlASPX is ideally designed for developers and organizations that wish to incorporate Perl technology within their ASP.NET hosted web pages," said Matt Herdon, Director of Product Management, Programming Tools, ActiveState. "PerlASPX adds further depth to ActiveState's offering for .NET Framework development, and will be updated for the upcoming Microsoft Visual Studio .NET 2003 release with our other related products � Visual Perl, Visual Python, Visual XSLT, and Perl Dev Kit."
PerlASPX is priced at $395/server, available immediately. For a limited time, ActiveState is offering a launch special of $345/server, and will also include a free copy of "Programming in the .NET Environment" with every PerlASPX order.
About ActiveState Corp.
ActiveState is the global leader in applied open source software. Over 70% of the Fortune 500 depends on ActiveState technology, which ranges from programming tools to message management. The company's products and services enable IT professionals and enterprises to increase productivity and reduce corporate risk. Information on solving business and programming challenges with applied open source solutions is available at: www.ActiveState.com.
Media and Analyst Contacts: Lori Pike, ActiveState
ActiveState, PerlASPX, Perl Dev Kit, PerlNET, Visual Perl, Visual Python, and Visual XSLT are trademarks of ActiveState Corp. All other company names herein may be trademarks of their respective owners. 2003 ActiveState Corporation. All rights reserved.
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OPCFW_CODE
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I just replaced my phone with a new Microsoft Lumina 950 XL which is a great phone. In my usual fashion of checking out the new features of my phone I wanted to see how my web sites looked.
The operating system of this phone is the Mobil version of Windows 10 and of course is using the new browser called Edge. Well it seems that my blog did not look good at all on this new platform and was in fact not even close to being workable. Even though I had the fonts set to the smallest setting, what was displayed were hugh letters so hardly any words fit on a line and was just crazy looking. However, I noticed that other web sites looked just fine especially the ones that I recognized and truely being built around the bootstrapper framework.
I was also surprised as to how many other web sites look badly in this browser with the same problems that I had. Anyway I may address some of that in a later post but right now, what I wanted to find out is if I changed the syle of this blog would it solve my problem. If I just changed the theme or something could it be possible that my site would look great again. This was all very surprising to me as I had tested the responsiveness of this site and it always looked good, just don’t know why my new phone made it look so bad.
New Theme, based on Bootstrapper
Looking for different themes for Hexo was not a problem, there are many of them and most of them are even free. I am really loving the work that I have done working with the Bootstrapper Framework so when I found a Hexo theme that was built around the Bootsrapper Framework, you know I just had to try it. Well this theme looked great a lot simpler looking theme than what I was using which was really the default theme with a few customizations. The new theme was also open source and in another git hub repository. The instructions said to use some sub-module mumbo jumbo to pull the source into the build. Well now I was curious as there was something that I saw on the build definition when working with git repositories, a simple check box that says include sub-modules. Looks like it is time to find out was git sub-modules is all about.
Welcome to another git light bulb moment.
What is a git sub module.
The concept of a git sub module is a whole new concept for me as a developer that has been using for the most part, a centralized version control system of one sort or another for most of my career. I then looked up the help files for these git sub modules and read a few blog posts, and it can get quite complicated but rather then going through all that it can do let me explain how this worked for me to quickly update the theme for my blog. In short, a git sub module is another git repository that may be used to prove source for certain parts for yet another git repository without being a part of that repository.
In other words, instead of having to add all that source from this other git repository and adding it to my existing Blog git respoitory it instead has a reference to that repository and will pull down that code so that I can use it during my build both locally and on the build machine. And the crazy thing is it makes it really easy for me to keep up with the latest changes because I don’t have to manage that it is pulling the latest from this other repository through this sub module.
I started from my local git repository and because I wanted this library in my themes folder I navigated to that folder as this is where hexo is going to expect to see themes. Then using git-posh (PowerShell module for working with git) I entered the following command.
git submodule add https://github.com/cgmartin/hexo-theme-bootstrap-blog.git
This created the folder hexo-theme-bootstrap-blog and downloaded all the git repository into my local workspace and added a file called .gitmodules at the root of my Blog bit repository. Looking inside the file, it contains the following contents:
[submodule "themes/bootstrap-blog"] path = themes/bootstrap-blog url = https://github.com/cgmartin/hexo-theme-bootstrap-blog.git
When I added these changes to my staging area by using the add command:
git add .
It only added the .gitmodules file and of course the push only added that file as well to my remote git repository in TFS. Looking at the code of this Blog repository in TFS there is no evidence that this theme has been added to the repository, because it has not. Instead there is this file that tells the build machine and any other local git repositories where to find this theme and to get it. The only thing left was to change my _config.yml file to tell it to use the bootstrap-blog theme and run my builds. Everything works like a charm.
I really don’t think that there is any way that you can do something like this using centralized version control. Humm, makes me wonder, where else can I use git sub modules?
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OPCFW_CODE
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/// gets the dataset from the database.
public void Load_Data()
SqlCommand myCommand = new SqlCommand("[dbo].[ExtractWebData]", myConnection);
myCommand.CommandType = CommandType.StoredProcedure;
System.Data.SqlClient.SqlDataAdapter adapter = new System.Data.SqlClient.SqlDataAdapter(myCommand);
ds = new DataSet();
ds.Tables.TableName = "Customers";
ds.Tables.TableName = "Purchase_Orders";
ds.Tables.TableName = "Purchase_Order_Details";
ds.Tables.TableName = "Inventory";
Now if there was just some way to use that in a report. It would be great to use a stored procedure to twist all the data into shape before handing it off to a reporting tool! So you create an xsd. You add a table adapter.
Except that you can't do that. You see, the .rdlc report requires that you have the data available at design time in order to design the report. And there is no way to import multiple datasets at once into the .xsd at design time.
From this document: http://msdn.microsoft.com/en-us/library/dd239331.aspx
I have no idea what the text-based query designer is, but as we saw in SQL Server Management Studio...If multiple result sets are retrieved through a single query, only the first result set is processed, and all other result sets are ignored. For example, when you run the following query in the text-based query designer, only the result set for Production.Product appears in the result pane:SELECT ProductID FROM Production.Product GO SELECT ContactID FROM Person.Contact
In my opinion, this is an EPIC DESIGN FAIL on the part of Microsoft.
We know from the earlier code snippet that Visual Studio can access the data, it just - for some stupid reason - is designed in such a way as to disable this feature in certain cases. This is completely unacceptable. But until Microsoft fixes this glaring, stupid, boneheaded omission, we're stuck with it.
Now, I know this blog has no regular readers. You didn't find this page because you're a fan of Visual Studio Journey. You found it because you were googling for this problem, and there were no answers anywhere else. I wish I had better news, but I don't.
Here is the only way I know to work around this issue. Unravel your stored procedure and execute the whole thing in your client. Convert each piece into individual queries, and add those to your .xsd.
Alternately, you could split your stored procedure into multiple pieces, like Proc1, Proc2, Proc3... but then you've kind of lost the convenience of the one-stop shopping the stored procedure offers.
Just to be clear: I think that the ability to return multiple result sets from a stored procedure is awesome! Kudos to the SQL Server development team. If only the Visual Studio guys would catch some of that brilliance, things would be great.
Just to make myself clear, I think that this feature has awesome potential and multi-table stored procedures are still incredibly useful in Visual Studio. They just are not usable for rdlc reports (the one thing they would be most ideally suited for in an ideal world).
Bryan Valencia is a contributing editor and founder of Visual Studio Journey. He owns and operates Software Services, a web design and hosting company in Manteca, California.
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OPCFW_CODE
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Compatibility with custom vocoder checkpoints?
Greetings!
I've tried to replace your supplied pretrained ParallelWaveGAN checkpoint with a different one I trained (Using the implementation over at https://github.com/kan-bayashi/ParallelWaveGAN ), to go along with a custom StarGANv2-VC checkpoint.
I copied the parameters from the config.yml that you supply with your pretrained checkpoint exactly, and used your checkpoint for finetuning.
However, the resulting vocoder checkpoint cannot use the output of StarGANv2-VC correctly - it produces near-clipping, way too low-frequency-centric output, even when running over the original wave files for testing.
After some investigation (and a lot of headache), it seems that the mel spectrograms produced by StarGANv2-VC use a different log base and are not compatible. So I trained a PWG vocoder with log() instead of the default log10(), but this also did not yield acceptable results.
It seems that the normalization you use for StarGANv2-VC is different, also. (?)
Your own vocoder checkpoint was trained with those changes implemented, since it works fine out of the box. But they're not documented.
If possible, could you please share details about what changes you made when training your ParallelWaveGAN checkpoint, so that other vocoder checkpoints may be correctly trained for use with StarGANv2-VC? That would be great.
Please read the ASR & F0 Models section:
The pretrained F0 and ASR models are provided under the Utils folder. Both the F0 and ASR models are trained with melspectrograms preprocessed using meldataset.py, and both models are trained on speech data only.
The ASR model is trained on English corpus, but it appears to work when training StarGANv2 models in other languages such as Japanese. The F0 model also appears to work with singing data. For the best performance, however, training your own ASR and F0 models is encouraged for non-English and non-speech data.
You can edit the meldataset.py with your own melspectrogram preprocessing, but the provided pretrained models will no longer work. You will need to train your own ASR and F0 models with the new preprocessing. You may refer to repo Diamondfan/CTC_pytorch and keums/melodyExtraction_JDC to train your own the ASR and F0 models, for example.
I replaced the preprocessing and normalization code bits in the ParallelWaveGAN repo with the ones you pointed at, but I'm getting nowhere.
Unlike your nicely structured StarGANv2-VC repo, the PWG code is neither compact nor easy to understand and I'm severely out of my league trying to make the code edits work together with the rest of the implementation because bits of it are scattered across way too many files.
The PWG dataset preparation fails at the compute-statistics stage with:
ValueError: X has 406 features, but StandardScaler is expecting 458 features as input.
May be my fault. Actually most likely is my fault. I don't know if I'm passing it data in the right way.
I understand why it needs those statistics but I don't understand how to fix it up so it tolerates the different preprocessing.
Do you know if there is any fork/repo out there that has the necessary changes implemented already? Does not have to be clean code.
The first thing you will need to do is to make sure the hop_size, win_length, and`` sample_rate are set correctly in the configuration files of ParallelWaveGAN because the size mismatch is most likely caused by those setting issues (i.e. sampling rate not divisible by hop size). Then you need to modify [line 213 in parallel_wavegan/bin/preprocess.py] (https://github.com/kan-bayashi/ParallelWaveGAN/blob/master/parallel_wavegan/bin/preprocess.py#L213) to replace logmelfilterbank with the preprocess function above. You also need to make sure that [normalize.py] (https://github.com/kan-bayashi/ParallelWaveGAN/blob/master/parallel_wavegan/bin/normalize.py) does nothing because I didn't use the speaker statistics when training the vocoder as it appears to be unnecessary.
Unfortuantely, I moved on from ParallelWaveGAN to HifiGAN because as you said the repo is very messy and hard to maintain, so I didn't save the training code where I've made the change.
Oh hm... HifiGAN I'm more familiar with, also. Grafting the normalization from your repo into it shouldn't be as hard as with PWG, though that raises the question in my mind if that'll have further repercussions.
Since tacotron2 is involved in the teacher-forcing part of dataset preparation (for fine-tuning, which is the only feasible route given I mostly have small datasets to work with), that would mean I'd have to retrain a model for that as well, due to the replaced preprocessing + normalization?
And so I'd need to have full-fledged datasets, which is kinda throwing a wrench into the huge benefit of StarGANv2-VC, namely that it works with unannotated data and thus opens up interesting possibilities for playing around with voices one would normally not be able to build tts models for...
So I'm curious how you're using it.
Why would you need to use tacotron 2 in this case? HifiGAN does not need any labels to train either, because it is just a vocoder.
True, though the datasets I have are truly tiny and don't succeed when training from scratch. So far I've had success when using teacher-forcing when processing them, and for that I need tacotron2 parent models. Which were also finetuned. Maybe that explains my worry.
Unless there is a way I'm not aware of -- feel free to tell me my approach is unnecessarily complex. I'd be delighted to just run across a vocoder for once that doesn't involve esotheric procedures for training and is easy to use.
I finally got ParallelWaveGAN to accept the new preprocessing and produce a vocoder checkpoint that works with the other parts of your repo. 😤 Used your checkpoint for finetuning. I kept the speaker statistics.
Thank you very much for pointing me in the right direction.
@Kreevoz , how did you manage to achieve that -- i.e. changed PWGan code to accept new preprocessing ? I was finetuning StyleMelGan from the PWGan repo, but had the same issue as you -- vocoder checkpoint from Demo notebook just produce distorted sound.
So I understand that your took PWGan checkpoint from this repo and continued training? I guess in my case I'd had to start from the start.
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Low-Cost Sensor Platform Guide, Part 1
By Sruti Modekurty, OpenAQ Platform Lead
We have been hard at work for the past year working on this major addition to the platform and we are so excited to finally share it with all of you! Below, you will find a summary of what’s new and what’s different as well as more detailed guides on website and API updates.
- New kinds of data — low-cost sensor, mobile, extra parameters
- Dashboards on website give overview of data
- V2 API with low cost sensor data and improved performance
- Access all of the data through the API
- Updated data type definitions
- Slight V1 API differences
- API docs are interactive
*New* Data Type Definitions
With the addition of data from low cost sensors, we have redefined how we categorize data. Previously, the ‘sensorType’ attribute was either ‘government’, ‘research’ or ‘other’. Now, we have ‘sensorType’ as either ‘reference-grade’ or ‘low-cost sensor’ to refer to the kind of instrument collecting the data. We have added another attribute called ‘entity’ which can be ‘government’, ‘research’ or ‘community’. This is to allow greater flexibility in how data is labeled, recognizing that groups, from governments to researchers, are increasingly using both reference-grade and low-cost sensors. Governments are launching low cost sensor networks and research groups may employ both reference and low-cost sensors. What was previously labeled as ‘sensorType = government‘ (which was pretty much all of the data on the platform), is now ‘sensorType = reference’ and ‘entity = government’.
For more information, read the detailed definitions of data on Github.
If browsing for data through the website, you can filter using the following
*New* Extra Parameters Available
In addition to our core parameters (PM2.5, PM10, CO, O3, NO2, SO2), we now have extra parameters available for a limited set of locations sourced by EDF and PurpleAir including PM1, PM1 counts, PM2.5 counts, PM10 counts, CH4, CO mass, CO2, NO, NOx, NO2 mass, O3 mass, SO2 mass, UFP count. While we recognize other sources may be reporting some of these additional parameters, we do not have those available on the platform at this time.
*New* Mobile Data Available
Previously, all data on the platform was collected through stationary monitors. With the addition of low cost sensor data, we now have mobile monitors from EDF and HabitatMap. Mobile monitors can collect data for multiple locations, allowing for greater range and flexibility.
The world map has always been a page to get a bird’s-eye (well maybe more like a satellite’s-eye) view of data available through the platform. In addition to reference data as circles, you can now see low cost sensor data as squares. Clicking on one will take you to the dashboard for that location.
The locations page has been updated with new filters to make it easier to search for data and location cards have been updated with tags such as ‘Low cost sensor’, ‘Community’, ‘Mobile’ for easier identification of data types. Clicking ‘View More’ on a location card will take you to a Dashboard for that location.
The new Locations Dashboard (a redesigned version of the Locations page with way more functionality) gives you an overview of the data from a location. It allows you to get quick stats about the data including number of measurements, recent values, source information and more. Each location is tagged with a unique ID so you can easily reference and access data for that location. For example, the ID for Concón in Chile is 27.
The dashboard also displays time series charts for the past week of data and temporal coverage charts for all parameters available. The parameters table gives average values and counts for all parameters as well.
[Screenshot of Locations dashboard, graphs + table]
By default, the dashboard displays information for all the data available from that location. You can specify a time window for which you would like to view stats and graphs in the upper left corner.
For example, this recalculates the time series chart to display hourly averages for the month of January 2021.
As usual, you can see other nearby locations at the bottom of the dashboard.
For data from a mobile sensor, the dashboard will show a bounding box for all the locations where measurements were collected, like the following example of a Google Street View Car from the Breathe London Project.
The datasets page is a new addition to the website. A dataset groups locations managed by the same source which share similar characteristics. Right now, that means standardized deployment practices, data post-processing and quality assurance — all of which are documented in related metadata and a technical Readme, and which are unique to the data sets currently included on the datasets page. Datasets allow for additional exploration of air quality across comparable locations within the same network. We are exploring expanding the definition of a dataset and would love your feedback!
The Datasets Dashboard shares similarities with the Locations Dashboard, with some notable differences.
Datasets with stationary data allow you to select specific locations out of the dataset to regenerate the stats and charts. Click on each square in the map and click ‘Select Location’ to choose locations. Click ‘View Location Data’ to update the stats and charts.
Many of the current datasets contain ‘Analysis’ data meaning it has undergone cleanup and post-processing, the details of which can be found in the Technical Readme. For Analysis Datasets, the Time Series and Temporal Coverage charts are not available. Instead, a map of all the measurements are shown.
That’s it for the website updates! This is a pilot, so we are really looking for feedback on the platform, and would appreciate it if you could take a few minutes to fill out this short survey.
Stay tuned for Part 2, which will cover API updates and platform architecture changes.
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The Gentoo Name and Logo Usage Guidelines apply. It's similar to NTLDR or BOOTMGR for Windows, but support both Windows and Linux kernels, and comes with more features. The configuration file is now written in something closer to a full scripting language: variables, conditionals, and loops are available. It can't detect corruption in general, but this is a sanity check on the version numbers, which should be correct. 7 : Loading below 1MB is not supportedThis error is returned http://creartiweb.com/grub-error/grub-boot-error-codes.php
Unset by default. Learn more You're viewing YouTube in German. Ok, booting the kernel Situation The system hangs after displaying the following line: Uncompressing Linux... To let GRUB know the size, run the command uppermem before loading the kernel. http://www.uruk.org/orig-grub/errors.html
a GNU system). Reasons for the prompt also include a failure to update GRUB 2 after certain system or partition operations, improper designation of the grub folder location, missing linux or initrd.img symlinks in This file consists of lines like this: (device) file device is a drive specified in the GRUB syntax (see Device syntax), and file is an OS file, which is normally a See DOS/Windows.
What is this box next to my car's battery? I have started researching the issue and finding that people usually recommend to boot to a Live CD and fix the issue from there. If the menu is not normally displayed during boot, hold down the SHIFT key as the computer attempts to boot to display the GRUB 2 menu. Grub2 After this message, the system stops.
You can put any comments in the file if needed, as the GRUB utilities assume that a line is just a comment if the first character is ‘#’. Grub Commands Over the next few years, GRUB was extended to meet many needs, but it quickly became clear that its design was not keeping up with the extensions being made to it, Use the UP/DN/Left/Right cursor keys to navigate to the desired point for editing. find more To do this, include the ‘configfile’ and ‘normal’ modules in the core image, and embed a configuration file that uses the configfile command to load another file.
This happens when you try to embed Stage 1.5 into the unused sectors after the MBR, but the first partition starts right after the MBR or they are used by EZ-BIOS.-------7. Grub Error Windows 7 Example: set root=(hd0,5) insmod normal. If available, the command set pager=1 will also limit returns to a single screen. This article is based on a document formerly found on our main website gentoo.org.
The system has three drives. http://askubuntu.com/questions/119597/grub-rescue-error-unknown-filesystem Detect all installed RAM GRUB can generally find all the installed RAM on a PC-compatible machine. Grub Manual Video Converter Ultimate Your complete video toolbox: download, convert, edit, burn and more. Grub Command Line Boot In short, it will reinstall GRUB2 altogether instead of repairing it.
Solution Turn off framebuffer (typically remove vga=XYZ from grub.conf) and check the processor architecture in the kernel config. navigate here The default is to use the platform’s native terminal input. ‘GRUB_TERMINAL_OUTPUT’ Select the terminal output device. GRUB error 18 Situation kernel (hd1,4)/bzImage root=/dev/sdb7 Error 18: Selected cylinder exceeds max supported by BIOS Solution This error is returned when a read is attempted at a linear block address This happens when you try to embed Stage 1.5 into the unused sectors after the MBR, but the first partition starts right after the MBR or they are used by EZ-BIOS. Grub Error 15
Wird geladen... The return status is greater than zero if n is greater than $# or less than zero; otherwise 0. Ads by Google 2 answers Comments are Closed Timothy Liem August 17, 2012 at 7:28 am it seems that the installation of GRUB has failed. Check This Out When installing GRUB, it just hangs Situation When installing GRUB, it hangs: root #grub At this stage, the installation stops.
It should contain grub.cfg and many *.mod files. Grub Error 22 Thus you can load the kernel just by specifying its file name and the drive and partition where the kernel resides. Once booted into the system, correct the filename or move the configuration file to its proper location.
Even though this question has an answer, there is an alternative way to fix the problem that worked for me. Pressing Ctrl-Alt-Del will reboot. If n is not given, it is assumed to be 1. Grub-install This would generally only occur during an install of set active partition command. 30 : Invalid argumentThis error is returned if an argument specified to a command is invalid. 31 :
When creating a BIOS Boot Partition on a GPT system, you should make sure that it is at least 31 KiB in size. (GPT-formatted disks are not usually particularly small, so Anmelden 281.500 Aufrufe 489 Dieses Video gefällt dir? The until command is identical to the while command, except that the test is negated; the do list is executed as long as the last command in cond returns a non-zero http://creartiweb.com/grub-error/grub-error-25-fix.php A single quote may not occur between single quotes, even when preceded by a backslash.
Defaults to ‘serial’. ‘GRUB_CMDLINE_LINUX’ Command-line arguments to add to menu entries for the Linux kernel. ‘GRUB_CMDLINE_LINUX_DEFAULT’ Unless ‘GRUB_DISABLE_RECOVERY’ is set to ‘true’, two menu entries will be generated for each Linux See Obtaining and Building GRUB, for more information. If looking for a specific file, include the name in the search to limit the number of returns. Example: unset prefix Modules must be loaded before they can be used.
If connected to another machine when an update of grub-pc is made, the upgrade may be written to the incorrect device and make the computer unbootable. Melde dich an, um dieses Video zur Playlist "Später ansehen" hinzuzufügen. This generally happens if your disk is larger than the BIOS can handle (512MB for (E)IDE disks on older machines or larger than 8GB in general).Ошибка Grub 18СитуацияКод: [Выделить]kernel (hd1,4)/bzImage root=/dev/hdb7
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If your favorite audio player is iTunes you probably already know that it can only interface to the Windows 7 audio stack using Shared mode which passes audio samples through the Windows Audio Engine (mixer). Itunes does not yet offer a setting to enable Exclusive mode which passes audio samples unaltered (bit-perfect) directly to the audio device bypassing the Windows Audio Engine and any digital signal processing (DSP) that the engine may perform. You can however achieve "near" bit-perfect playback using Shared mode by making a few simple changes to Windows 7 sound settings, and being mindfull of where volume control occurs and of any DSP that may occur in the audio device. The Windows settings are accessed through tabs on the Control Panel Sound applet for the given default audio device. 1. Set level to 100% 2. Disable sound effects 3. Set output sample rate = source sample rate 4. Set output bit depth > source bit depth With these settings the Windows Audio Engine will only perform int->float(32)->dither->int processing on the audio samples. There will be no Windows volume or effects processing, no sample rate conversion, and since the output bit depth is greater than the source bit depth, mathematical precision is maintained and truncation distortion is avoided when the float(32) samples are dithered then converted to the output integer bit depth. The only DSP that occurs in the audio engine is dithering. It's actually re-dithering since the samples would have already been dithered at some point during audio post production. This gets as close to bit-perfect through the audio engine as is possible using Shared mode But what about volume control? Since Windows volume level for the audio device is set to 100% that leaves volume control in the hands of either the audio player or an external device such as a Preamp or DAC. Since the goal is to maintain near bit-perfect playback (i.e., the only DSP is dither) then the volume control must not perform any DSP on the audio samples. The only case where no volume DSP will occur is where the audio player volume is set to 100% and an external analog volume control is used. If however the audio player controls volume or the external device uses a digital volume control then DSP occurs on the audio samples. Finally, the device driver and firmware for the audio device (external DAC, motherboard audio chip, sound card, etc) must not perform any DSP on the samples before converting them to analog. Chat w/whiteboard on the Windows audio stack from two of the designers: Larry Osterman and Elliot Omiya. http://channel9.msdn.com/Shows/Going+Deep/Vista-Audio-Stack-and-API BACKGROUND: WASAPI Audio Rendering Modes Note: all existing Windows audio API's were re-plumbed to go through WASAPI. Shared mode: audio is processed by the Windows Audio Engine before being sent to the hardware audio device. The audio engine performs DSP including mixing, enhancement (EQ, bass boost, etc.), sample rate conversion, dithering, and so on. Multiple audio applications can send audio simultaneously through the engine and share the hardware audio device, hense the term "Shared mode". Exclusive mode: audio bypasses the audio engine and is sent directly to the hardware audio device. When an audio application enables Exclusive mode, no other application can use the audio device. Exclusive mode is geared for pro-audio applications that perform their own DSP, however it can also be used to achieve bit-perfect playback if (1) the audio player does not perform any DSP and (2) the hardware audio device supports the source sample rate and bit depth exactly and does not perform any DSP before converting the samples to analog.
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Can not start the cms after successfull installation!
I have the same issue posted by 'keilcarbon'.
This question is never been answered so I am wondering if it will be answered now.
Firefox say:
"
The page isn't redirecting properly
Firefox has detected that the server is redirecting the request for this address in a way that will never complete.
"
Any help will be appreciated.
I would like to upgrade the all project to CI3
Thanks for your help.
After grabbing a fresh copy of the 1.1 version I installed it and got a redirect issue (no errors); I could not view any pages apart from the front (home) page. Here is what I did to fix it. Opened .htaccess file and altered line 6 from RewriteBase / to RewriteBase /playground/cms-canvas_v1.1/ as cmscanvas was installed in two directories from the root. After that i would access all pages front/admin without any issues.
Thanks for sharing this.
I have tried all the possible combinations around the RewriteBase but I get still the same behavior. By the way you was lucy you could see the homepage , I can not see the home page either.
Thanks for your reply.
I will try to re-install the all application once more and I let you know.
Cheers
Franco
<EMAIL_ADDRESS>On 16 Feb 2016, at 16:44, Cosmo<EMAIL_ADDRESS>wrote:
After grabbing a fresh copy of the 1.1 version I installed it and got a redirect issue (no errors); I could not view any pages apart from the front (home) page. Here is what I did to fix it. Opened .htaccess file and altered line 6 from RewriteBase / to RewriteBase /playground/cms-canvas_v1.1/ as cmscanvas was installed in two directories from the root. After that i would access all pages front/admin without any issues.
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Reply to this email directly or view it on GitHub.
Make sure all required modules are enabled i.e. mod_rewrite. Try installing WordPress to ensure its not an issue with MAMP etc.
WordPress?
Sorry but I don't get you now. Is this CMS made to be used with WordPress? Because I dont use it.
Cheers
No it's not meant to be used with WordPress. cmscanvas is a CMS itself, WordPress is another. I was merely suggesting that you installed WordPress in order to see whether or not it would install successfully. I was hoping to helping you narrow down your issue to MAMP or cmscanvas.
Nonetheless, it seems that you figured out your issue since you closed this issue... Mind sharing with me your resolution?
Thanks for your reply.
I have tried everything possible but unfortunately the problem persists.
I think I must go for something else. It’s a pity the developer don’t support this anymore. In this case I think he should
mention it. This to avoid people loosing time for nothing.
Cheers
Franco Magliozzi
<EMAIL_ADDRESS>On 18 Feb 2016, at 19:44, Cosmo<EMAIL_ADDRESS>wrote:
No it's not meant to be used with WordPress. cmscanvas is a CMS itself, WordPress is another. I was merely suggesting that you installed WordPress in order to see whether or not it would install successfully. I was hoping to helping you narrow down your issue to MAMP or cmscanvas.
Nonetheless, it seems that you figured out your issue since you closed this issue... Mind sharing with me your resolution?
—
Reply to this email directly or view it on GitHub.
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HELP, I have been perplexing over this simple step in my FLOW and i need to make this work ..
1. i have a trigger : When a file in created in SharePoint (the expected created file is an excel file)
2. Get Rows in Excel , then For each row in the Excel file I need to create a Record in Common Data Source Entity
3. All fields in the CDS entity are available in the Excel file (as i have used Export Template to Excel from the custom CDS entity)
4. For non-Numeric fields in my CDS entity, i can dynamically match them to the input Excel file's columns
5. However for NUMERIC fields in CDS entity, nothing shows up for me to choose for dynamically updating the CDS numeric field . (i.e. the Get Rows outputs is not even displayed ! )
Could you please expand the "List rows present in a table" action within your flow?
Do you use the "List rows present in table" action to retrieve rows from the new file created in your SharePoint library (use the "When a file is created in a folder" trigger to detect)?
Further, could you please show a bit more about your Excel file?
If you use the "List rows present in table" action to retrieve rows from the new file created in your SharePoint library (use the "When a file is created in a folder" trigger to detect), I afraid that there is no way to achieve your needs in Microsoft Flow currently.
Specifying a file dynamically is not supported in the "List rows present in table" action of Excel Online (Business) connector, you could only specify the file through File Browser.
I have made a test and the issue is confirmed on my side. If you could dynamically match Excel file's columns within the other non-Numeric fields of the "Create a new record" action, you could take a try with the following formula to reference the Number column in your Excel file:
I have made a test on my side and please take a try with the following workaround:
Note: The Amount column is a Number type field in my CDS entity. on your side, you should type the following formula within the Number field (YTD Actuals field):
The value you get from your Excel table is text value, you should convert the text value into number value to match the Number field of your CDS Entity as above formula.
More details about using expression in flow actions, please check the following article:
@v-xida-msft I will try your workaround to extract the number column from the excel Get Rows using your expression and get back to you . thanks in advance.
I have tried your recommended step to create expression to extract the excel numeric fields to update my CDS Entity numeric field
It only worked for 1 column, the rest of the excel numeric columns when used in the function INT
Learn how to create your own user groups today!
Check out the new Power Platform Community Connections gallery!
Congratulations, the new Super User Season 2 for 2021 has started!
Power Platform release plan for the 2021 release wave 2 describes all new features releasing from October 2021 through March 2022.
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This Call for Code session forms part of the Connecting Women in Technology Live conference running from the 14th to the 17th June
This sessionL CWT Live with IBM – How you can get involved with Tech for Good initiatives
Call For Code is a global tech for good initiative run in a partnership between IBM, the United Nations and Linux Foundation. It is an open innovation programme that aims to support innovative solutions that solve some of the world’s biggest challenges.
We’re celebrating our 4th year running Call For Code in 2021 with a focus on tackling the impacts of climate change in the world through 3 main themes:
Clean water and sanitation
Responsible production and green consumption.
During this session you will:
see examples of how tech for good initiatives and open innovation can harness technology and inspire technologists to find solutions to some of the worlds most pressing challenges
learn how you can get involved with Tech for Good to help make a real impact on our collective future
hear from a diverse team that took part in our Call for Code Racial Justice challenge and how you can contribute towards this open source project to help promote racial justice.
Introduction to Call for Code and Starter Kit Guided Tour with Angela Bates, Developer Programmes Manager from IBM
Innovative open source solution idea for you to contribute:
‘Take Two’ – Call for Code Racial Justice challenge
Hear from IBM team members:
* Johanna Saladas, Software Engineer;
* Naagma Timakondu Technical Lead for AI Ethics;
* Naoki Abe Distinguished Research Staff Member
* Iain McCombe Principle Product Manager
Discover how Take Two helps alleviate racial biases online. Take Two scans written content and ensures that racial biases both glaring and subtle are caught. The API is backed by a crowdsource bank of words and phrases that are racially biased. With AI the model learns in what context these wordsTechnical Focal, AI Ethics are harmful and highlight them for the user.
Learn how the API and AI behind this tool including Kubernetes, Python, Fast API, Docker, Cloudant, and CloudDB.
Find out why this is important and how you can get involved with the deployment of this project.
More about this conference
Connecting Women in Technology (CWT) is a cross industry network established for the joint benefit of employees from Avaya, Dell, IBM, and Intel and has been running for over 10 years. The intent of the network is to inspire all to connect, drive and develop their careers in a diverse and inclusive environment.
The theme of the event: Reconnecting post pandemic and returning to career focus
We have all gone through change over the last year from how we work, communicate, spend time with family and socialise. With so much change many of us of had to put our career focus on the back burner. As part of the week long virtual CWT Live event, we will be running activities to reengage your mind, career and your network
We will be offering sessions throughout the week you can pick and choose the ones that work for you and your interests.
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The latest and greatest content for developers.
Introducing Dear Moby
Moby has accrued a “whaleth” of knowledge over the years, and as it turns out, can’t wait to share his advice and best practices with you — the Docker community. Submit your questions for the opportunity to be featured in our Dear Moby column or videos!
News you can use and monthly highlights:
Serving Machine Learning Models With Docker: 5 Mistakes You Should Avoid – Here are a few quick tips on what to do and what not to do when serving your machine learning models with Docker.
Efficient Python Docker Image from any Poetry Project – Need to pack your python project into a Docker container? Using Poetry as a package manager? Check out how this Dockerfile can be a starting point for creating a small, efficient image out of your Poetry project, with no additional operations to perform.
NestJS and Postgres local development with Docker Compose – Modern applications demand high-performing frameworks that allow developers to build efficient and scalable server-side apps. Learn how you can use Docker Compose to build a local development environment for Nest.js and Postgresql with hot reloading.
Building a live chart with Deno, WebSockets, Chart.js, and Materialize – Here’s a quick step-by-step guide that helps you to build a simple live dashboard app that displays real-time data from a Deno Web Socket server in a real-time chart using Chart.js powered with Docker Compose.
Supporting the LGBTQ+ Community
Happy Pride! We’re always proud to swim alongside our LGBTQ+ community, colleagues, family, and friends. Learn more about eight organizations supporting the LGBTQ+ tech community.
The latest tips and tricks from the community:
- Merge+Diff: Building DAGs More Efficiently and Elegantly
- Docker Technology Enables the Next Generation of Desktop as a Service
- Kickstart Your Spring Boot Application Development
- Building Your First Dockerized MERN Stack Web App
- NestJS and Postgres local development with Docker Compose
- 9 Tips for Containerizing Your Spring Boot Code
- How to Build and Deploy a Django-based URL Shortener App from Scratch
Creating Flappy Dock
The feedback from our community has been overwhelmingly positive for our latest feature releases, including Docker Extensions. To demonstrate the limitless potential of the SDK, our team had a little fun and created a game: Flappy Dock. See how we built it and try it for yourself.
Educational content created by the experts at Docker:
- Deploying Web Applications Quicker and Easier with Caddy 2
- JumpStart Your Node.js Development
- 6 Development Tool Features that Backend Developers Need
- Build Your First Docker Extension
- Simplify Your Deployments Using the Rust Official Image
- Cross Compiling Rust Code for Multiple Architectures
- From Edge to Mainstream: Scaling to 100K+ IoT Devices
- How to Quickly Build, Deploy, and Serve Your HTML5 Game
- Connecting Decentralized Storage Solutions to Your Web 3.0 Applications
Docker Captain: Damian Naprawa
This month we’re welcoming a new Captain into our crew: Damian Naprawa. Damian started writing blogs for the Polish Docker Community to share his knowledge. His favorite command is docker sbom and he’s very interested in improving developer’s productivity.
See what the Docker team has been up to:
- Dockerfiles now Support Multiple Build Contexts
- Dockershim not needed: Docker Desktop with Kubernetes 1.24+
- Introducing Registry Access Management for Docker Business
- New Extensions and Container Interface Enhancements in Docker Desktop 4.9
- Securing the Software Supply Chain: Atomist Joins Docker
- Docker advances container isolation and workloads with acquisition of Nestybox
- Welcome Tilt: Fixing the pains of microservice development for Kubernetes
DockerCon 2022 On-Demand
With over 50 sessions for developers by developers, watch the latest developer news, trends, and announcements from DockerCon 2022. From the keynote to product demos to technical breakout sessions, hacks, and tips & tricks, there’s something for everyone.
Subscribe to our newsletter to get the latest news, blogs, tips, how-to guides, best practices, and more from Docker experts sent directly in your inbox once a month.
0 thoughts on "June 2022 Newsletter"
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How often have you created a new Kubernetes cluster to ‘test something new’? How often have you created a new Kubernetes cluster to start learning about new functionalities? In my case, I do this pretty frequently. I very frequently spin up (and down) Azure Kubernetes clusters.
This approach comes with two downsides however: it takes about 5 minutes to spin up a cluster and clusters carry a cost. Although Microsoft pays for my Azure usage, I still need to be mindful of costs.
There are however different ways to create clusters that don’t carry a cost, and that could create clusters faster. One of those solutions is minikube. This is a VM based-solution that creates virtual machines to run nodes of a Kubernetes cluster locally.
Another solution is to run kind (Kubernetes in Docker), which will be the focus of this blog. By running kind, you won’t run Kubernetes nodes as a virtual machine, but you’ll run them as container. The biggest benefit of this approach is that it’ll be even easier and more lightweight to quickly create and destroy a Kubernetes cluster.
For the purpose of this blog, I’ll be installing kind on my WSL2 setup. The end goal is to deploy a web app and expose that web app to the host system. To make sure I’m capturing all steps, I created a brand new WSL environment running Ubuntu 18.04 for WSL2, with nothing installed.
kind has 2 prerequisites: go (11+) and Docker. It’s also going to be useful to have
kubectl installed. We can install these the following way:
sudo apt-get update sudo apt-get install docker.io golang -y curl -LO https://storage.googleapis.com/kubernetes-release/release/`curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt`/bin/linux/amd64/kubectl chmod +x ./kubectl sudo mv ./kubectl /usr/local/bin/kubectl
With that out of the way, you’ll have to start the Docker daemon. If you’re running this in WSL I highly recommend checking out this post I wrote last week about automatically starting the Docker daemon in WSL. If you’re not running on WSL, you can start the Docker daemon using the following command:
sudo systemctl start docker
Installing kind is as simple as getting kubectl:
curl -Lo ./kind https://kind.sigs.k8s.io/dl/v0.8.1/kind-$(uname)-amd64 chmod +x ./kind sudo mv ./kind /usr/local/bin/kind
Setting up a first cluster in kind
To setup a cluster in kind, you use the following command:
kind create cluster
This will create the cluster in Docker. It automatically stores the context to connect to it on the kube-config file. This means you can immediately interact with the cluster and run:
kubectl get nodes
Which will show you a single node:
Running a sample app on kind
To test things out, I’ll be running a sample app on kind. As an example I’ll pick the app we used in the 7th chapter of the Hands-on Kubernetes on Azure book. This is a good demo app since it uses configmaps, deployments and a service to connect to it. The code for this sample is available on Github.
git clone https://github.com/PacktPublishing/Hands-On-Kubernetes-on-Azure---Second-Edition.git cd Hands-On-Kubernetes-on-Azure---Second-Edition/Chapter07
From that directory, we’ll first create the three configmaps:
kubectl create configmap server1 --from-file=index1.html kubectl create configmap server2 --from-file=index2.html kubectl create configmap healthy --from-file=healthy.html
And then create two deployments:
kubectl create -f webdeploy1.yaml kubectl create -f webdeploy2.yaml
This will cause the deployment and pods to be created. It takes a couple seconds for them to become live, since the images need to be downloaded. Please note, since we’re running a single-node cluster, these pods will be run on the master node.
Next, we’ll need to deploy the actual service that load balances between server1 and server2. The demo app was built to run on AKS, with service type LoadBalancer. This is not available on kind, since there is no external load balancer to provision.
To solve this, we can change our service to be a service of type NodePort. That will solve the load balancer issue, but it won’t make traffic available from the host yet. To make traffic available from the host, we’ll have to map a port from our cluster to our host machine. And that’s what we’ll do next.
Making a service available in kind
In this section we’ll destroy our current cluster and create a new (multi-node) cluster that exposes port 80. Since we’ll be using a service of type NodePort, we’ll need to assign a high port number (between 30,000-32,767). We’ll use that port number for the NodePort, but have kind expose it on port 80 to our host.
To destroy our demo cluster, we can execute the following command:
kind delete cluster
Next, we’ll create a custom cluster in kind. We’ll create a cluster with a single master node, 2 worker nodes and we’ll expose port 80 on the nodes.
To do this, we’ll create a kind cluster configuration file, which is a YAML file. The following YAML should do the trick:
kind: Cluster apiVersion: kind.x-k8s.io/v1alpha4 nodes: - role: control-plane - role: worker extraPortMappings: - containerPort: 32345 hostPort: 80 listenAddress: "127.0.0.1" - role: worker
We can then create a new cluster using the following command:
kind create cluster --config kind.yaml
And then we need to recreate our application.
kubectl create configmap server1 --from-file=index1.html kubectl create configmap server2 --from-file=index2.html kubectl create configmap healthy --from-file=healthy.html kubectl create -f webdeploy1.yaml kubectl create -f webdeploy2.yaml
With the application deployed, we can also deploy our service. We’ll need to adapt the
webservice.yaml file to allow for our NodePort service:
apiVersion: v1 kind: Service metadata: name: web spec: selector: app: web-server ports: - protocol: TCP port: 80 nodePort: 32345 type: NodePort
Which we can then create using:
kubectl create -f webservice.yaml
And that will make our service available on
Which is exactly what I wanted to achieve.
In this post we looked into kind, a way to quickly run a Kubernetes cluster on a single machine. We deployed a single-node kind cluster and deployed an application to it. Afterwards, we created a new cluster, that allowed us to expose networking services.
I hope this helps you in cases where you quickly want/need a Kubernetes cluster to test something, without having to wait for an AKS cluster (and without having to pay for the resources).
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twister build of samples/audio/sof/sample.audio.sof fails on most platforms
./scripts/twister -T samples/audio/sof/ -l
Gets a slew of errors like:
ERROR - m2gl025_miv samples/audio/sof/sample.audio.sof FAILED: Cmake build failure
ERROR - see: /home/galak/git/zephyr/twister-out/m2gl025_miv/samples/audio/sof/sample.audio.sof/build.log
INFO - Total complete: 5/ 308 1% skipped: 12, failed: 5ERROR - Cmake build failure: /home/galak/git/zephyr/samples/audio/sof for minnowboard
ERROR - minnowboard samples/audio/sof/sample.audio.sof FAILED: Cmake build failure
ERROR - see: /home/galak/git/zephyr/twister-out/minnowboard/samples/audio/sof/sample.audio.sof/build.log
INFO - Total complete: 6/ 308 1% skipped: 12, failed: 6ERROR - Cmake build failure: /home/galak/git/zephyr/samples/audio/sof for qemu_x86_64
ERROR - qemu_x86_64 samples/audio/sof/sample.audio.sof FAILED: Cmake build failure
ERROR - see: /home/galak/git/zephyr/twister-out/qemu_x86_64/samples/audio/sof/sample.audio.sof/build.log
INFO - Total complete: 7/ 308 2% skipped: 12, failed: 7ERROR - Cmake build failure: /home/galak/git/zephyr/samples/audio/sof for litex_vexriscv
...
INFO - Total complete: 308/ 308 100% skipped: 12, failed: 308
INFO - 0 of 308 test configurations passed (0.00%), 308 failed, 12 skipped with 0 warnings in 26.35 seconds
INFO - In total 308 test cases were executed, 12 skipped on 320 out of total 321 platforms (99.69%)
INFO - 0 test configurations executed on platforms, 308 test configurations were only built.
INFO - Saving reports...
INFO - Writing xunit report /home/galak/git/zephyr/twister-out/twister.xml...
INFO - Writing xunit report /home/galak/git/zephyr/twister-out/twister_report.xml...
INFO - Writing JSON report /home/galak/git/zephyr/twister-out/twister.json
INFO - Run completed
@nashif fyi.
@nashif fyi.
Same as https://github.com/zephyrproject-rtos/zephyr/issues/31143
Same as https://github.com/zephyrproject-rtos/zephyr/issues/31143
@nashif @galak we probably need a ifdef INTEL_CAVS_FAMILY around SOF atm as today it only builds against certain xtensa SoCs.
Fwiw, @lyakh is doing some updates to make the code fully generic in time for SOF 1.7 and Zephyr 2.5 (there are some drivers/arch code that is getting pulled to the SOF build in some places).
@nashif @galak we probably need a ifdef INTEL_CAVS_FAMILY around SOF atm as today it only builds against certain xtensa SoCs.
Fwiw, @lyakh is doing some updates to make the code fully generic in time for SOF 1.7 and Zephyr 2.5 (there are some drivers/arch code that is getting pulled to the SOF build in some places).
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Awarded by National ICT R & D Commission, Pakistan to Abasyn University Islamabad Campus
Mobile Computing is considered to be the next big thing on the face of technology and availability of platforms like smart phones is going to play a very important part in enabling the mobile computing to achieve its true potential. Even in the time of economic crunch in 2008-2009 smart phones market has been seeing continuous improvement and big guns like Google, RIM and PALM have made heavy investments in this market in one form of the other. Some of the companies have focused on the hardware while some of the companies have realized that availability of killer applications on the smart phones can enhance their revenue many times.
Applications development on the smart phones is comparatively newer field. Although the techniques like J2ME (Java2 Micro Edition) have existed for quite some years but as the name indicates they had micro set of features. Only after the availability of iPhone and Android enabled smart phones, the world has seen the availability of the functionally complete APIs for smart phone applications development. This was a big step as the future of smart phones market depends heavily on the availability of killer applications.
Mobile environment, though constrained, provides some interesting features and facilities not directly available on the desktop computers. One such feature is the availability of integrated cameras on most of the smart phones. This feature can be used to provide killer applications related to Character Recognition but before that some API / framework and engine should be there that can provide the basic building blocks for the development of applications related to Character Recognition. This proposal has been inspired by the motivations described above. We want to develop a state of the art OCR Engine which can be used by the developers to develop their own applications. We intend to divide the project into two different phases. In the first phase we want to tackle the character recognition problem for the constrained document images and in the next phase we want to tackle character recognition problem for the unconstrained document images. This document gives a top level overview of the techniques and algorithms that we intend to use in this project. Besides giving the top level design, we have also discussed some of the candidate algorithms. Almost all the commercially available OCR systems have image pre processing modules associated with it. We have also divided our system into four steps: Image acquisition, Image preprocessing and segmentation, Classification / Recognition of the text and Post Processing. Experience of our Team in different dimensions of character recognition namely Image Pre Processing, Pattern Recognitions, and Smart Phones Development augurs well for the success of this project.
Success of this project would not only result in research experience and related advantages for the developers inside Pakistan but will also stimulate the smart phones software development in Pakistan. Last but not the least it would give a great opportunity for the students of Abasyn University and other local universities to work on the top notch research problems of the field. Open source nature of the project would encourage collaboration from developers all over the world.
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OPCFW_CODE
|
using System;
namespace SkunkLab.Channels.WebSocket
{
public sealed class WebSocketConfig
{
public WebSocketConfig(int maxIncomingMessageSize = 0x400000, int receiveLoopBufferSize = 0x2000,
int sendBufferSize = 0x2000, double closeTimeoutMilliseconds = 250.0)
{
if (maxIncomingMessageSize <= 0)
{
throw new ArgumentOutOfRangeException("maxIncomingMessageSize");
}
if (receiveLoopBufferSize <= 0)
{
throw new ArgumentOutOfRangeException("receiveLoopBufferSize");
}
if (closeTimeoutMilliseconds <= 0.0)
{
throw new ArgumentOutOfRangeException("closeTimeoutMilliseconds");
}
MaxIncomingMessageSize = maxIncomingMessageSize;
ReceiveLoopBufferSize = receiveLoopBufferSize;
SendBufferSize = sendBufferSize;
CloseTimeout = TimeSpan.FromMilliseconds(closeTimeoutMilliseconds);
}
public TimeSpan CloseTimeout
{
get; internal set;
}
public int MaxIncomingMessageSize
{
get; internal set;
}
public int ReceiveLoopBufferSize
{
get; internal set;
}
public int SendBufferSize
{
get; internal set;
}
}
}
|
STACK_EDU
|
As has been the case for a few months now, for those who just can’t wait for a write-up about the newest alpha but tend to steer clear of the bleeding edge of nightlies, the new build should typically be available on the 1st of the month at mirrors.xbmc.org/snapshots.
With that said, we’ve now completed months #5 and #6 of our monthly development cycle, and there’s much to talk about.
These past two months have primarily seen the growth and refinement of already existing system-wide features. A few more notable of those features include:
Ripped CDs are now automatically added the the music library, and ripping support has been extended to allow for encoding into AAC and WMA, in addition to the currently supported codecs.
One of the first big benefits of the settings refactor has been the inclusion of new settings descriptions. Now, when you highlight a setting that previously made next to no sense, a small description will pop up clarifying what the setting actually accomplishes, as can be seen near the bottom of the below image.
Those familiar with Github are encouraged to consider adding more settings descriptions.
Additionally, profiles can now have their settings levels locked, so if your kids have their own profile, they can’t accidentally switch to more advanced settings, causing major problems throughout XBMC.
The default Wunderground addon has been updated to work with recent builds of XBMC. This primarily results in fixes for previous alphas, but also adds support for 5 locations, and allows for more appropriate labels in certain cases. Backwards compatibility was removed with this update, so users of this addon who are still running Eden may find weather no longer works. Those users are encouraged to switch to the Yahoo weather addon or update to XBMC 12.2.
For those users who experience exceptional lag over their local network, a new Advanced Setting has been included that allows significant cacheing over the network. In most modern networks, this setting should not be necessary, but it is useful in some edge cases.
Finally, recent work has been done to speed up the pace at which XBMC loads thumbnails for videos without any attached artwork. The speed of thumbnail loading had regressed since XBMC 11. This work returned some of that speed.
Both XBMC for Windows and OSX now support their respective copy/paste functions (either ctrl+v or CMD+v).
XBMC for Android has finally be updated to match the other platforms with Zeroconf support. In particular, this means it can act as an Airplay receiver. Additionally, XBMC can now act as a default player of video, audio, and image files when launched from an Android file browser.
Of course, as always, this is merely a very small sample of the many changes in these two cycles. Now, if you are feeling a bit brave and a bit lucky, it’s time to start downloading. Be aware though, that this is very alpha software with potentially numerous bugs. There is a good chance that this alpha will break on you.
Should want to download and install XBMC, please visit our download page.
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OPCFW_CODE
|
error reproducing simulation on FactorUCB
hi, I'm interested in your paper that was published in AAAI 17,
and am trying to get the simulation running, but am receiving the following error.
$ python Simulation.py --alg factorUCB
...
File "Simulation.py", line 508, in
algorithms['LinUCB'] = N_LinUCBAlgorithm(dimension = context_dimension, alpha = alpha, lambda_ = lambda_, n = n_users)
TypeError: init() got an unexpected keyword argument 'n'
This occurs because the constructor for the N_LinUCBAlgorithm class doesn't expect an "n" arg, but instead an "init" one which does not seem related to the "n" in question.
class N_LinUCBAlgorithm:
def init(self, dimension, alpha, lambda_, init="zero"): # n is number of users
self.users = {}
Should I just remove " n = n_users' from the call on line 508 in Simulation.py,
as you sometimes call N_LinUCBA without it from within that same file ( see line 495) ?
algorithms['LinUCB'] = N_LinUCBAlgorithm(dimension = context_dimension, alpha = alpha, lambda_ = lambda_)
Thank you
I'm running things in Python 2.7, and when I removed "n = n_users" from the call above, the code proceeds farther, but then runs into the following error below. Thank you for the assistance.
$ python Simulation.py --alg factorUCB
...
Users 9 CoTheta [ 0.17459147 0.04203424 0.16958883 0.02280975 0.23921426 0.05525657
0.09552645 0.11874966 0.07183244 0.0457676 0.28499082 0.
0.01674014 0.1272744 0.3656073 0.28675806 0.165991 0.07772692
0.17026372 0.07092157]
Traceback (most recent call last):
File "Simulation.py", line 525, in
simExperiment.runAlgorithms(algorithms)
File "Simulation.py", line 302, in runAlgorithms
VDiff[alg_name] += self.getL2Diff(self.articles[pickedArticle.id].featureVector, alg.getV(pickedArticle.id))
File "Simulation.py", line 170, in getL2Diff
return np.linalg.norm(x-y) # L2 norm
ValueError: operands could not be broadcast together with shapes (20,) (25,)
Same error!
Thank you @diegoolano @scheeloong for pointing out the problem, and it is fixed now:)
|
GITHUB_ARCHIVE
|
The market for experienced data analysts is currently higher than the supply. This indicates that organizations are about to go out of their way in remunerating the few available professionals. At the moment, data management is an area that still needs more professionals. To make sure that breaches are filled, Microsoft has introduced certifications that qualify learners to become competent data managers.
One of these certifications is the Microsoft Certified Solutions Associate (MCSA): SQL 2016 Business Intelligence Development. To achieve this certification, you must sit for two exams, which are 70-767 (Implementing a Data House Using SQL) and 70-768 (Developing SQL Data Models). Microsoft 70-767 exam is one of the exams needed to achieve Microsoft Certified Solutions Expert (MCSE): Data Management and Analytics certification.
Still, this article will present you with all the details you need to know about the 70-767 exam and tips to prepare for the exam. This exam is designed for data warehouse developers engaged in creating BI (Business Intelligence) solutions. As a developer, you’ll be engaged in tasks like data cleansing, ETL, and implementation of a data warehouse.
Microsoft 70-767 Exam Details
Microsoft 70-767 exam comprises 40-60 questions that you’re expected to answer within 150 minutes. Microsoft doesn’t give the precise type of questions before the exam, so be prepared that it may differ frequently. However, the question types may involve multiple-choice, build lists, drag-and-drop, active screen, case studies, review questions, short answers, and best answer. To pass the 70-767 exam, you must obtain a passing score of 700 points. Pearson Vue is the site where you need to schedule your exam. The exam cost is 165 USD.
Microsoft 70-767 Exam Syllabus Objectives
The objective of this exam is to measure your skills in carrying out the following technical tasks:
- Maintaining, designing, and implementation of a data warehouse
- Extracting, transforming and loading data
- Generating data quality solutions
If you’re preparing to achieve the MCSA SQL 2016 BI Development, then you are expected to have the basic IT skills. You can get them on your own or to pass the essential IT exam and to get the MTA certification from Microsoft. This certification is not a must; that’s why you are free to make a decision.
If you are going to get the MCSE Data Management and Analytics certification, you need to own one of the following MCSA certifications: SQL Server 2012/2014, SQL 2016 Database Administration, SQL 2016 Database Development, SQL 2016 BI Development.
Best Tips and Tricks to Pass Microsoft 70-767 Exam
This exam is a bit challenging, and you may have to spend 4-5 months studying for it. Your practical experience will help you pass this exam. You have to go through the topics many times to understand the exam material thoroughly. So, what’s the perfect way to prepare for the 70-767 exam? The tips described below will help prepare for the exam. Make sure you take your studies. Sincerely.
Understand the Skills Measured in the Exam
The objectives or skills that the exam evaluates you in are the essential aspects of the exam. Read through the syllabus topics many times to ensure you’ve not overlooked anything. Though you’ve included all the topics, come back to the skills measured and ensure if you’ve learned them all. You can acquire this information and other exam details from the Microsoft Website.
Use Appropriate Study Guides
Learning from study guides is a great way to understand the topics covered in the exam and to understand the exam objectives. It’s the first thing you should get before starting your exam preparation. Moreover, the 70-767 study guide will help you organize your time effectively. The recommended study guide for the Microsoft 70-767 exam is Exam Ref 70-767 Implementing a SQL Data Warehouse.
Register for an instructor-led course
Microsoft suggests Implementing a SQL Data Warehouse instructor-led course for your 70-767 exam prep. You can select the on-demand or classroom option, according to your availability. If you have some problems while reading a study guide or an optional book, you can ask your instructor to explain the question that arose.
Take Video Courses
Taking a course, make your preparation more thorough and sufficient. The course offered by Microsoft is the first one you should give your attention to. Still, the best ones can also boost your exam preparation. Below, you’ll find some authentic courses that you can make use of.
Take 70-767 Practice Tests
Practice tests are beneficial in passing your Microsoft 70-767 exam. These tests are the ideal way to get the perception of the exam. Well, the Microsoft official practice test can get the Microsoft website. Many reputable websites also there to help you out with your preparation.
For Recommended Microsoft 70-767 Certification Practice Tests
Reasons to Earn Microsoft 70-767 Certification
If there’s one exam that IT professionals should go for, then it’s this specific one. There are several reasons to pass this Microsoft certification exam. The job market demands more data analysts. It indicates that by achieving your MCSA or MCSE certification, you’ll be among the few professionals whose skills are in great demand. Here are more reasons to take and pass the 70-767 exam:
- You obtain a certification awarded by the industry leader
- You’ll acquire unique and most in-demand skills
- Passing the exam increases your self-confidence and encourages you to scale up the career ladder
- Your opportunities for getting a job go soaring
- Excellent and unique skills mean better pay by the employers
- You become a valuable employee when it comes to your responsibilities
- You’ll get preference for internal promotions
Understanding the appropriate study material to study for your exam prep is only the initial step. You must consciously spend sufficient time and concentrate on your studies. There’s no shortcut to passing the Microsoft 70-767 exam. Make sure you have all the concepts learned and compartmentalized a few days to take your exam. This way, you will be confident of passing your exam to obtain your MCSA SQL 2016 BI Development or MCSE Data Management and Analytics certification. With any of this certification, you can make a prominent career as a data analyst, BI analyst, or database analyst.
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OPCFW_CODE
|
What are idiomatic ways to harmonize ^5 ^4 ^3?
I have only learned a few chords in my harmony and voice leading book. I, I6, V, V6, ii, ii6, IV and the inversions of V7. I am now trying to harmonize this melody and so far the most idiomatic bassline to use for this descending line according to my book is a a pattern of 10ths between bass and soprano. So in this case it would be I6,V43,I with 5^4^3 in the soprano. However, in this case it wont work because the ^6 before the descending line is a subdominant harmony and would need to go to a dominant chord. My bassline for the ^5^4^3 doesnt really work I think. That said would my only other option be V, V7 ,I?
Are you required to match the rhythm of the melody and harmonize every single note independently without passing tones? Also. . . what's the next note in the melody? Is it to the A? If so, I might do half-notes: A-B-D-C#.
Correct. Every note needs to be harmonized. Next note is A
Okay in that case, I'd probably go UP to D rather than down, and then just step down the scale with the melody in 10ths, finishing up-E, down-E, up-A
Are you not allowed to use repeated or held notes in the bass when harmonizing? I'd personally use only E for the bass under ^5 ^4 to go with V-V7.
TL;DR
Idiomatically, the best options in this specific instance are:
The given solution
Parallel 10ths
Voice exchange
Parallel 10ths
I mention this first only to reiterate what's already written in the OP. Parallel 3rds, 6ths, and 10ths are highly idiomatic, so that's always a good place to start when considering a harmonization. See below for why it's a very good solution in this particular case.
Contrary motion / voice exchange
Another highly idiomatic option is to counter the soprano 5-4-3 with 3-4-5. This is called "voice exchange", because the soprano and bass (in this case) swap scale degrees 3 and 5. Harmonically this would generally be I6-IV-I64 or, less commonly, I6-ii6-iii.
Voice exchange is just a special case of contrary motion. Once could just as well accompany 5-4-3 with 1-2-3, and harmonizing with I-V43-I6.
Regarding IV proceeding to V
This is not the only option for IV. IV (and, less commonly, ii) can also be used to prolong a I chord. I-IV-I is a perfectly acceptable progression.
This means that parallel tenths will work very well for the harmonization of the melody given in the OP.
Another option is to harmonize ^4 with ^3 in the bass, which is a bit difficult to analyze harmonically, then harmonize ^3 with ^4 in the bass, which more straightforwardly yields IV7. This is not what we tend to think of as idiomatic, and I first encountered it in the music of Aaron Copland, but the second place I encountered it was in the music of J. S. Bach. It doesn't work if you're cadencing on ^3, but that's not the case in the example given in this question.
@phoog Big bonus points if you can find the Bach reference!
Aaron My textbook says thay intermediate chords move to dominant chords not to tonic chords. Later in the book (because I skip ahead from time to time) it does discuss IV going back to I but the level that I am on only allows intermediate Harmony to move to dominant Harmony. Having said that, the IV chord on beat 2 cannot move to I or I6 right? Also, your I6 ii6 iii harmony involves bass notes 3-4-3 not 3-4-5. Please let me know if this is right?
Can you please explain your proposed solution of parallel tenths using I IV I for 5-4-3?
@armani I-IV-I6-V43-I
@phoog I don't think you'd figure those chords that way. You'd treat the melodic note as an appoggiatura (and I'd probably write it as a grace note if it was classical style or earlier). Also, if you can find that example (as Aaron also requested), I'll also give you big bonus points. :D
Thanks Aaron. That is what I wanted to do but book doesnt allow moving IV to I6. Not yet anyhow so I want to complete the exercise without using harmonies not yet covered.
@Bennyboy but it isn't an appoggiatura. In the Bach piece I have in mind, the Loure from the 5th French Suite, the harmonic rhythm is quarter notes, all voices are homophonically moving in quarter notes, and the alto voice has G F♯ E F♯ while the bass has F♯ G A D. In the final cadence, the alto has C B A B while the bass has B C D G. In the Copland (Appalachian Spring), the chord is perhaps conceived quartally, but it could also be described as I6 with an added tone. In C, the chord is, from bass to soprano, E G C F.
Furthermore, the chord preceding the IV7 (or, in the first instance, IV7/V) in the Bach is also interesting in that it is a tone cluster. In the first instance, it comprises the pitches F♯ G A, and in the second A B C D (the order here emphasizes the cluster rather than reflecting the voicing, which is B A C D).
I see, it looks like you mean bar 7 of the abovementioned piece. Let me take a look.
@armani You've already completed the exercise using the harmonies given so far in the book. So I don't understand your OP.
@phoog I don't think trying to figure those notes, or analyze them as a cluster, serves much purpose. In this case, a description of the motive is better. Instead of the high F# at that cluster, think of it an octave down, and you can see a series of 10th intervals in two voices, and a run of passing notes in the "tenor" voice from A (5th of D) at the start of the bar down to E (5th of A) at the end. Unfortunately, Gilels makes it sound like a monkey fart, but if you listen to Gould or others, you can see how the motion of the lines matters greatly, and the momentary harmony not at all.
@Bennyboy1973 I agree it's totally motivated by the counterpoint, but the fact remains that (ignoring octave displacement) it's a cluster. There's a fair number of options for harmonic analysis, but I haven't yet encountered one that I find particularly satisfying.
@phoog Yeah, I wouldn't want to be asked how to write this in figured bass. It's interesting to think of the Baroque as an ongoing musical experiment. I mean, simple V7 or dim vii chords wouldn't have made sense until you decided that the contrast between chaos and order, or displeasure and pleasure, were more important than harmonic homogeneity. Those chords really say, "Don't just analyze me now, see where this is going." I'd say moments like this "cluster" take that idea to an extreme so rare that it falls out of classical theory, which is a distillation of what was normal.
@phoog btw, thank you for that example. It is in fact a little surprising (for me, at least, not having studied a huge amount of Bach) to see him doing that.
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STACK_EXCHANGE
|
Getting Small: Building Lightweight Web Applications with Small-Footprint Databases
Not every application needs a full-featured enterprise-scale database. In such cases, you can reduce costs and save resources by using a small-footprint database.
by DEVX Staff
Jul 20, 2007
Page 1 of 5
f you've done any open-source database development recently, you probably already know that when it comes to selecting a database for your application, you have a plethora of choices. You are no longer limited to commercial products such as Microsoft SQL Server or Oracle; open-source products such as MySQL and PostgreSQL are viable alternatives, offering similar features at a fraction of the cost.
However, while these products have rich, robust feature sets and reduce costs, they're not smallthe latest downloadable versions of PostgreSQL and MySQL weigh in at 12 MB and 57 MB respectively. For small-scale applications that have minimal database needs, using any large feature-rich database products is often overkill; it's often more appropriate to use a small-footprint database instead. Even though small-footprint databases may lack sophisticated features such as triggers, views, and stored procedures, they make up for the reduced feature set by requiring minimal resources and disk space.
But what small-footprint databases are available, and how do you use them in a project? This article attempts to answer that very question by describing some of the options available and building a sample application. The sample web application that accompanies this article is a personal to-do list, which allows an individual user to log items "to do" in a database. A browser-based interface supports commands to add, edit, or delete items from the to-do list, and displays a list of completed and pending items.
What You Need
The sample application uses PHP, running under the Apache Web server. Both are open-source projects that you can freely download and install to your development environment.
Choosing A Database
Here's a quick overview of six small-footprint database choices available. All the contenders described here are lightweight open source products suitable for small-to-medium complexity applications.
Apache Derby is possibly the best-known of the small-footprint Java database engines. As an open-source project, it is freely available for download and use (in personal or commercial projects) under the Apache License. Derby is fully ACID-compliant, meets the ANSI SQL standards, and is specifically designed to be embedded directly into a Java application. It runs in the same JVM as the source application and uses an embedded JDBC driver for database communication. Derby supports multiple concurrent users (even in embedded mode), integrates well with IDEs such as Eclipse and NetBeans and server environments such as Tomcat and WebSphere, and includes various interactive, Java-based, command-line tools for database manipulation.
H2 is another small, fast Java-based database engine, usable via both JDBC and ODBC APIs. It can be used in both embedded and server modes, and includes support for triggers, joins, views, stored procedures, and encryption. Concurrent use is supported, and H2 also supports a simple clustering mechanism, which makes it suitable for use in mission-critical applications that have high uptime requirements. H2 is freely available online under the Mozilla Public License.
Ocelot is a Windows-only database engine that provides full compliance with SQL-92 and SQL-99. Packaged as a 32-bit Windows DLL, Ocelot integrates easily into Windows applications, and is accessible via the standard ODBC API in both single-user and multi-user mode. Ocelot fully supports triggers, stored procedures, and views, and comes with a graphical administration tool for database maintenance and query construction.
Firebird is a full-featured client/server RDBMS available for both Windows and *NIX platforms. It's based on the open-source version of the InterBase database by Borland. Firebird also provides an embedded single-user database engine as a library file, which you can integrate directly with any Windows or Linux application (there are some constraints on the Linux version). This embedded engine is fully compliant with SQL-92 and most of SQL-99; it supports ACID-compliant transactions, sequences, triggers, sub-selects, and referential integrity constraints, and includes various command-line tools for database interaction. The embedded Firebird engine is available under a license equivalent to the Mozilla Public License.
One$DB is an open-source version of a commercial Java RDBMS called DaffodilDB, and is embeddable into any Java application. It is compliant with SQL-99, and is accessible via JDBC (a PHP extension is also available). One$DB includes support for encrypted tables, triggers, views, and stored procedures, and is available for both personal and commercial use under the LGPL.
SQLite is a free, single-user, embeddable database engine implemented as a standalone C library. It uses a single disk file per database. It supports "most of SQL-92," according to the documentation, but does not include support for foreign key constraints, triggers, or stored procedures. It also supports only a limited version of the ALTER TABLE command and a small subset of field data types. However, it is the smallest and lightest of all the database engines in this collection, and is natively supported in PHP 5.x, both via a SQLite-specific driver and through the PDO data abstraction layer.
Which of these databases is best suited to the sample application being developed? Of course, the answer depends on your needs. Using the open-source LAMP stack helps keep costs down, so the Windows-specific Ocelot is out immediately if you take that route. Of the remaining options, SQLite is my choice for this application, for a couple of reasons. First, it's natively supported in PHP, so PHP developers can begin using it for development immediately, without any additional configuration or installation requirements. Second, although it lacks many of the more sophisticated features (such as triggers, stored procedures, and foreign key constraints) found in other databases, it's light and resource efficient, which translates into better performance. And third, a subjective factor: I'm not as familiar with Java as I'd like to be, and therefore find SQLite easier to use than an equivalent Java-based RDBMS engine.
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OPCFW_CODE
|
...experiencia de aprendizaje, etc... ¿qué nos gustaría ver en tu cv? - que dispongas de experiencia como desarrollador full stack developer - que tengas amplios conocimientos de java y bbdd - alto nivel de inglés será muy valorable (podemos tener oportunidades para realizar formaciones en inglés). - Disponibilidad para formación virtual...
I need a app mobile app, for a new business. Share of business included. Payments method monthly with releases after reviews. Project with connection with social media. Opportunity for new freelancers (please do not apply to ask unrealistic prices on 2021)
...issues on my site. I need you to fix the Facebook and Google login feature. And need you to fix the native react so the site is mobile friendly for both android and iOS. There is no app just a website that can be access using mobile device. In a way this can be a task for a full stack developer. I don’t make enough money neither is the site profitable. So
A programmer who is able to work on the JMRTD program is required. The program is based on the Java language. Whoever finds himself competent and able to work in this program, please contact me. The required wage will be agreed upon
We are looking for someone who can optimize a WordPress template/theme. We increased the perform...revolution slider to increase the score in the Google speed tool, but still, we can't find a way to get above the 90 for mobile and desktop when testing wit the Google tool. The objective of this project is to achieve a 90> score for mobile and desktop.
I need to navigate i.e walk through the VR scene while watching it in android mobile through google cardboard VR. The VR scene was developed using UNITY software. Navigation achieved by any means i.e by using a pointer or head movement will be appreciated.
We already have a website. We would like to change its appearance from Text Heavy to Professional a...Text Heavy to Professional and Graphical. We would also need certain sections to be dynamic where changes can be easily made later on by us. The Website should be both Web and Mobile compatible. Please note we only want to avail re-designing services.
...already been completed and limited updates are expected. Also our team is very experienced in the back-end components, and we will train the resource on how to integrate the Mobile solution to the back-end This contract can be extended past the successful completion of the initial 3 months For any applicant, It is critical to provide any references
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...Incorporation 7. MSME Regn Certificate 7. GST Regn Certificate 8. PAN Card. of Borrower 9. Owners/Shareholders' complete contact details like full name and address, email, mobile#, passport copy, Aadhaar card, Driving Licence copy 10. Last 3 years IT Returns, audited Balance sheet, Profit & Loss 11. Latest Management accounts 12. Details of Existing
I need a new single vendor website and app. I need you to design and build a website n app for my small business. Android and iOS app website admin . backend build in Php/ CI/ laravel or other . few additional - vendor page to share there product details to the admin. admi.
i want mobile game complete project and ready to publish with reskin .similar to candy [URL'yi görüntülemek için giriş yapın] ready ads settings and in-app [URL'yi görüntülemek için giriş yapın] me game photo with message to me .
It is necessary to rewrite the plugin to Java script. At the same time, so that this plugin can run in the Construct 2 development environment, show ads, display them on screen and easily connect to the Appodeal website.
Looking for a resource who is experienced working with Flowable BPMN and setting workflow process in Spring Boot application Preferred skills: Java, Spring Boot, Spring security, Angular, PostgreSQL, JOOQ
I have a mobile notary service business. I would like to have a feather pen with dripping ink and I would like for the words Approved Premium Notary Services to look as if it were inside of a stamp.
We have a dated ASP.NET web forms application that needs to be...bootstrap and a standard set of CSS that we use in other solutions. The user interface would need to be responsive to different devices and display sizes including laptops and mobile devices. We are not looking for the C# code to be changed, we are only looking at changes to the HTML .
I need a developer to fix my current app or build it from scratch. The project will include the Mobile App and Website. Tasks are: -Fix / Building from scratch -Adding the functionalities & Challenges -Changing backend from .NET to Node.Js
We are working on an Android app for one of our clients. The app will complement a web-based interface. As a team, we have a considerable emphasis on good design, and are seeking someone with creativity in their work and good attention to detail. This will be a fixed budget work, with a scope for long-term works.
We are in need of design services for pages for our customer projects. We already have a design for it, and just need it to be built (Please the drawing at attachment files) This project is a request for making software for use in a product for SMSBR0ADCASTER M4CHlNE. The program was created by our software engineer and is running well now. Currently we need a design for the lay out with request...
Se necesitan programadores mobile, android, IOS y java para back (Indicar en que se especializan) Se desarrollará una aplicación de reparto a domicilio. La misma cuenta con 3 facetas - Cliente Final - Driver - Comercio El proyecto tiene una duración inicial de 4 meses y será extensible hasta 6 meses más con posibilidad de estabilidad a futuro.
Kindly read the these details clearly before you bid for the project 1. maintainance services Tenants will request for maintainance like, repair or ac, lightings or any leakage issues through the app..and once requested admin will respond him thru the app... maintenance department will have their own admin... once request sent from tenant.. maintenance dept will receive notification as well....
Есть готовое андроид приложение, нужно пофиксить баги связанные с рекламой(о багах объясню в лс). Ищу человека хорошо разбирающегося в Google AdMob, Mobile Ads SDK (Android), сделать надо быстро и качественно. Цена договорная. Контакт для связи: @(Removed by Freelancer.com Admin)
A portal (web app that works on pc as well as on mobile) with two types of users, one student and other is teacher. It will have the following functionalities • Teacher can schedule the class for a particular group/groups and students can join the video call at that particular time(with automatic attendance tracking ). • Teachers can share the study
I am working on a website and mobile app for a client. I need someone to do the following: - Video chat (between 2 participants) which works both on React + React Native - I have got 70-80% of the code using [URL'yi görüntülemek için giriş yapın] if you want to repurpose. - Provide transcript of the audio conversation to both participants (one participant might b...
Client Information [URL'yi görüntülemek için giriş yapın]>>>> with Mobile Number>>>> with out OTP [URL'yi görüntülemek için giriş yapın] Formation Information>>> attached details 3. Data Upload of Client1-5 members-Adding one by One( attached data File) 4. Passport Copies- Photo taken 5. Company Name( i...
I am looking for a web site and mobile app developer. I am based out of hyderabad. The mobile app would be released on a trial (MVP) mode and would be upgraded based on feedback and inputs. The content would be provided in a week's time.
Hello I am looking for a mobile app developer who has experience in working with Augmented Reality. You share your portfolio with me and we can discuss details about the specific kind of app I want later.
I need a new website. I need you to design and build it.
We need mobile developer who has great experience of Firebase Need someone who can help me to update our app. You have to prepare your aws/azure environment for free tier usage It was built using Firebase. We have ongoing work Need mobile app developer for our website. 3) Treble Boost. 4) Volume Boost. 5) Slider volume & audio control. 6) Surround
...Requirements: - users can create their own avatar: customise their skin color, clothing, hair style and color, accessories. - the avatar / character can be controlled by touch on mobile devices and mouse clicks on pc. - we want the character designs and animations to be high quality (2D design is fine, no need for 3D at the moment). - we want to be able to
we are Australian company; we need a React native app developer. we will prefer a person with open-source experience, application Backend Api is graphQL based and is ready. mobile app for both android/iOS, based on [URL'yi görüntülemek için giriş yapın] website must use react-native combined with [URL'yi görüntülemek için giriş yapın] ...
...enhancements to the Digital and Commerce Platform. Role of Contractor: Tech Design and hands on implementation of AEM and Java/Spring based applications. Developing components, dialogs and workflows. Develop and consume REST APIs using Java Content Repository (API) suite, Sling web framework and Apache Felix OSGi framework Assisting in deploying applications
need logo designs for my mobile accessories,kids wear,shoes brand
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Common cathode RGB LED Cube: Can/should it be done?
I'm planning to build a 8x8x8 RGB LED cube run by an Arduino Uno. This is my first electronic project since highschool ~ 20 years ago so I'm more than a little hazy on the subject and may be making fairly fundamental mistakes/assumptions.
I've seen Kevin Darrah's impressive implementation and wondered if it could be improved or simplified by using common-cathode RGB LEDs. I think that by having cathode columns and each layer consisting of three anode sets (e.g. R pointing left, G pointing right and B pointing to the back) I'd be able to run it with 8 shift registers such as the 74HC595 controlling the 64 columns and three controlling the 24 anode layers. Much fewer than the 25 Kevin is using to control 192 anode columns and eight cathode layers.
So my question is two fold:
a) Is my idea sound or would common-anode be a smarter way to do it?
b) What chips would I need to be the current source and sinks given that I want to get at least 256 shades from each colour in each LED and therefore need to else turn the RGB components on/off extremely fast and the amount of on Vs off time creates a POV effect and dims/brightens the colour, or be able to control the current.
Update with diagrams
Please pardon my terrible drawing skills, made even worse by doing this on a trackpad in Photoshop.
The darker colours are the legs coming from this LED. The fainter colours are the legs of adjacent LEDs. The RGB anodes all go laterally. R & G in opposite directions and blue perpendicular to that. The common cathode (black) forms the column and goes to the base of the structure. Three sides of the cube therefore have anode sets on them and act just like a regular LED cube would by activating (one colour within) that layer while the 64 columns are by the other set of chips. When one column is activated all activated layers on that column light up.
can you put a block diagram of your proposed method? and brief question b) it is bit hard to understand.
I'll add a block diagram tonight and expand point (b) now
Yes, you can make an 8x8x8 RGB LED cube with common-cathode LEDs.
Unfortunately, it won't be any simpler than a similar cube made with common-anode LEDs.
The reason is simple: it can seen from symmetry that common-cathode isn't any different from common-anode except for swapping the cathode and the anode:
The driving circuitry is just the same, except you swap positive voltages for negative voltages. Instead of NPN transistors, you have PNP transistors. Instead of current sources, you have current sinks. Just different. Not simpler.
You could design an LED cube with fewer shift registers regardless of the choice of common-cathode or common-anode. However, you then have to multiplex more LEDs, meaning each gets a smaller slice of time in which it can be on. At some point, the duty cycle of your LEDs becomes so low that you can't reasonably make them bright enough.
I agree that building the cube with a common anode is much easier but for different reasons. Your diagram of turning and twisting of your anodes would be difficult to produce a cube that is exactly on point , straight and symmetrical . Don’t get me wrong , it could be , but I think it is much easier to have one layer for your anode and three cathodes going straight down and wired underneath your base.
And I do realize this comment is about seven years late :-) And about building your cube-I have built the RGB cube and I am now encountering the same questions you had about Kevin Darrah’s schematic and the redundant MOSFET transistor.
I have read over the in-depth answer that another enthusiast had given and now I understand Kevin Darrah’s reason for the MOSFET coming off of the transistors voltage.
I am still trying to figure out the very beginning of Kevin Darrah’s schematic and I don’t know why he chose to use the AtMega328 chip boot loaded instead of just using an Arduino?? Again - personal preferences perhaps.
Building Kevin Darrah’s RGB CUBE is certainly a lot of work but it certainly does pay off in the end in many different ways. Not only do you get an awesome electronic color project, but you get in an incredible educational experience in basic electronics. Not to mention a thorough education in the 74HC 595 shift register. Yes, there are other shift registers out there that could have been used . But hey, what the hell . It works and it looks awesome !
My personal thanks to Kevin Darah for whom I have spoken with via email. He has been very helpful in all of my questions regarding his cube of over 10 years ago.
Be Well All . And Thank You.
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As I have already implied, I installed Mandriva Linux 2009 Spring on my EeePC 900. Mandriva is such a great Linux distribution and almost 100% EeePC-friendly. The first obstacle I had to overcome was the seemingly broken touchpad behaviour. The next obstacle I had to overcome was of much less importance: simulating ASUS EeePC Control functionality on Linux. Thankfully, there is a great software called EeeControl, but it wouldn't install on my new distribution. Hey, I am a Linux guy, so I had to fix this too. It wasn't that hard after all. Interested?
First things first. EeeControl is a combination of a daemon (system service) and a GUI application running in the tray which enables you to over- and underclock your EeePC, enable/disable built-in hardware (Wi-Fi, Bluetooth, camera, card reader) and automatically control the fan speed according to system temperature. Oh, yes, it also enables the F-keys shortcuts, like pressing Fn-F2 to toggle Wi-Fi. It's essential if you want to conserve battery power, keep the fan noise down and make your life with your EeePC easier.
Installing from an RPM
Installing EeeControl in Mandriva Linux 2009 Spring is a pain in the buttocks. I will give you step-by-step instructions to build an RPM yourself.
Installing from sources
Make sure you have set up all the media sources and that you are connected on the Internet before proceeding. If you have not added the media from the Mandriva Control Panel, you can do so by typing this at a root console:
urpmi.addmedia --distrib --mirrorlist '$MIRRORLIST'
Open a root console. All commands described below will be issued in that console.
First, we are going to install all the dependencies of the build process:
urpmi wget python-smbus rpm-build python-devel
Next, we'll try to build the binary RPM from its source RPM. Do note that this process will fail in the last step. This is the expected behaviour and we'll patch it later on.
cd /usr/local/src wget http://dl.getdropbox.com/u/285824/eee-control-0.8.4-1dj2009.0.src.rpm ln -s /usr/lib/python2.6/ /usr/lib/python2.5 rpmbuild --rebuild eee-control-0.8.4-1dj2009.0.src.rpm
The last step will halt with an error. After this error appears, edit the file /root/rpmbuild/SPECS/eee-control.spec and change this line:
Basically you just change the 2.5 to 2.6, as Mandriva Linux 2009 Spring has a newer version of Python than the one this source RPM package expected. Next up, we'll manually build the RPM:
cd /root/rpmbuild/SPECS rpmbuild -bb eee-control.spec
After the build is complete, you have a working, installable RPM file. So, let's install it!
cd /root/rpmbuild/RPMS/noarch urpmi ./eee-control-0.8.4-1mdv2009.1.noarch.rpm
After the installation is over, you'll have to activate the eee-control service:
service eee-control start
Now we can clean up by deleting the unnecessary files:
cd /root rm -rf /root/rpmbuild rm -f /usr/local/src/eee-control-0.8.4-1dj2009.0.src.rpm
That's all! You can now close your root terminal.
In order to use the EeeControl tray application, you have to run eee-control-tray, for example by pressing ALT-F2 to open the run box of your favourite desktop environment and typing in this command.
This will make a tray icon with the EeePC logo appear on your tray. Everything is self explanatory.
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How close can a spacecraft get to the Sun if it is limited solely by passive cooling?
The Parker Solar Probe’s trajectory will take it within 8.5 solar radii of the sun’s photosphere. Its instruments, hiding in the shadow of the alumina-coated composite sun shield, will bask in 29 °C comfort, even without a cooling system. (Only exposed solar panels are cooled).
The JWST uses the same strategy (at an orbital distance of 214 solar radii) to attain a temperature of 27 K in the shade.
From sketchfab.com,
If a probe were equipped with radiators on the entire anti-solar surface, how close could a probe approach the sun?
Porous alumina has a reflectivity of 99.0% for visible light and 99.4% for IR. On the radiator side, there are materials with emissivity of 97.0-98.5%.
This means a spacecraft which is highly reflective on the sunward side and highly emissive on the anti-sunward side should come to thermal equilibrium somewhere between the solar surface temperature of 5800 K and the cosmic background temperature 2.7 K, a rather large range. Any idea how to calculate this equilibrium temperature for a given solar distance?
As an example, this cube-shaped spacecraft has a 0.414 solar radii perihelion. It has heat pipes to keep the interior temperature the same as the radiator panels. The sunny side is 99% reflective and the radiators 98% emissive. What would be the temperature of the interior?
Or, conversely, beyond what perihelion could the interior temperature be compatible with living astronauts? Functioning space-hardened electronics?
Could you clarify what you would consider "active cooling" and "passive cooling" in a spacecraft context?
@Dragongeek ... "active"=consumes power or expends mass
Are we allowed to postulate a sun-shield that has a larger radius than the sun itself?
This simple example shows the effectiveness of a sunshade. Admittedly, a spherical black body may not be the best design for a sunshade, but it makes the calculation easy. In cold space, the temperature a cooler black body goes as the 4th root of the solid angle of the hot black body to which it is exposed. Cascading a calculation from the Sun to the sunshield and then to the spacecraft gives 10 solar radii as the minimum distance assuming 300K for the spaceraft.
[old answer]
An isothermal conical spacecraft provides another interesting example. Assume the blunt end is highly reflective (~99%) and faces the sun. The pointy end is very black (~99%) and is designed to just fit nicely inside its own shadow. Taking the sun as 6000K and assuming 300K as a comfortable temperature for the occupants, then it seems we will be able to orbit at about 18 solar radii.
A missing term in the calculation is the emissivity of the sunshade. Some alumina ceramics have low absorbance but high emissivity in IR. Since the sunshade is the hottest part of the spacecraft, it can emit a substantial portion of the absorbed flux. Can't do the math.
The circle area is small compared to conical area. PS. You're reading far too much into this, @Woody. It's just a chunk of conductive metal with silver paint on the blunt end and black paint on the pointy end :-) You can presumably do much better if you put some structures in to prevent/control heat flow - multiple sunshades like Webb.
The logic of your answer makes good sense. But the result of the calculation doesn't match up with the Parker Probe. Parker is 8.5 radii from the sun, but is about the same temperature as your example which is 2x further away. I was searching for an explanation.
@Woody the Parker probe cheats by using a sunshield (I modified the answer)
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Linux install4j installer changes/resets target folder permission to default (755) upon uninstall
We've discovered that our Linux install4j installer changes/resets target folder permission to default (755) upon uninstall.
More details below.
Before installation:
target main "app" folder does not exist
During installation:
target main "app" folder gets created with 775 Linux permissions
After un-installation:
target main "app" folder gets updated/changed/reset to have 755 Linux permissions (which is the default Linux folder permission ... at least for the default umask 022)
Since we have other files in the main "app" folder (e.g. log files not owned by install4j), it makes sense that this main folder does not get deleted upon uninstall. But what we need is to make sure the Linux permissions set on it during installation stay the same after uninstall. Otherwise, if someone tries to install the instal4j installer again, the required 775 permissions are not getting set properly on the folder (probably because install4j detects that it already exists).
Is there a way to preserve the 775 Linux folder permission upon an uninstall in case the folder is left behind?
Thank you,
Ciprian
UPDATE on 10-MAR-2021
Just to wrap up this thread, the conclusion is:
Linux permissions (directory mode) for the main installation directory (target folder) are not handled consistently between install and uninstall stages:
775 at install time (even though we are explicitly setting it to 774 in the install4j project)
this is not fixed in 8.0.11; from the change log, it seems it got fixed in 9.0.0:
"Linux/Unix installers: The configured Unix directory mode was not used for the installation directory"
755 after uninstall while leaving the main installation directory intact due to containing an extra log file (even though we are explicitly setting it to 774 in the install4j project)
this was fixed in version 8.0.7; I'm testing with 8.0.11 but we can see the matching change log under 8.0.7:
"Linux: The uninstaller could change the mode of directories that were not removed"
Full install4j changelog under:
https://www.ej-technologies.com/download/install4j/changelog.html
I don't see this here. Can you run the uninstaller with -Dinstall4j.log=<path to writable log file> and see if there is any mention of the mode change in the log file?
Thanks for the response Ingo.
I've done that and here is the link with the results: https://drive.google.com/open?id=1XvF7kX_efZuziOsiHekPY8Bd5BDatwxh . Do you see anything suspicious? Could it be we have some hidden action somewhere that changes the permission to the default? Thanks again for looking at this, Ciprian
Can you send the install4j profile file to<EMAIL_ADDRESS>Then I could check if there are any such scripts in it.
Sure can, I'll do that today. Thanks.
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I have three external hard drives all with a lot of data on them. One day, a power outage lasting a few seconds occurred. Data on the 3 hard drives became unrecognizable, garbled… turned to garbage. I’ve been using WD hard drives a while and have not seen anything like this happen before. Is there a bug that we don’t know about? Thanks
A power outage can result in data corruption. Particularly so if it resumes quite fast without allowing for the unit to drain and initiate the connection from scratch.
Agree, so run each drive through Windows “scan” and have it fix errors if it can. Good luck…
If a power outage happens again, how can I prevent the unit from “resuming quite fast without allowing for the unit to drain and initiate the connection from scratch.?”
What’s funny is that my internal WD HD was not affected.
I wish the external HD’s would automatically shut down after a power outage to prevent data lost. Thanks for the replies!
I have my devices that are prone to this problem connected to a UPS, so when a power blip comes along the units connected stay on and don’t go off for a very short time.
With a power outage, if the read/write head in the drive is out over the drive writing to disk it loses it’s synchronization and the data become garbage. Windows keeps a journal file for that reason and if you use chkdsk right after the power fail it can recover the lost data from the journal, up to a point.
I’ve had drives that would not boot after a BSOD and chkdsk fixed them…
Some drives provide a retraction mechanism for the heads in case of a power fail. In the old days it was simple charged capacitor that had enough current in it to park the head so they would not land on the disk platter.
The only way to prevent it as Mike27oct stated is to use a UPS (Uninterruptible Power Supply). They are external units and can get pretty expensive.
I use an inexpensive UPS ($40 model) t0 prevent an instant off and immediate turn on again. I have about 15-20 minutes of battery, so if power comes back on while on battery power, no big deal.and no harm. If power comes on after battery has drained I presume it will be steady when it comes on and no harm will befall system, and UPS will recharge battery.
My laptop computers are immune to this since they have internal battery kick in like a UPS does. So, I just use UPS for my NAS and another drive directly on the network.
It’s been a month since writing on this topic. I disconnected all three drives back then but reconnected them 2 days ago just to see if any data, etc., was salvageable? To my surprise and bewilderment, all data were in fine shape… hmm. I don’t know why, but I know now that my “digital” understanding is very weak! Can anyone tell me why data were all garbage back then but are all good now? Thanks
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Invoking Lifecycle Methods With iOS 13’s Modal Presentation
[caption id="attachment_426" align="aligncenter" width="700"]
Whoops, wrong lifecycle.[/caption]
iOS 13 was legendary
iOS 13 brought many cool things; dark mode, sign in with Apple and Memoji, just to name a few.
One of my favourite changes was the new card-like modal presentation style, where the presenting view controller is still slightly visible and dimmed out behind the presented view controller, and the presented view controller can be dismissed by swiping it down.
Bugs, bugs, bugs
This new feature, however, introduced a few bugs to some codebases that depended on lifecycle methods (ie. ViewWillAppear, ViewDidLoad) to perform certain actions.
[caption id="attachment_428" align="aligncenter" width="1024"]
PageSheet on iPad Pro 12.9-inch.[/caption]
It’s not uncommon to come across a codebase that has some sort of logic in these lifecycle methods — analytics, or refreshing UI with new data, for example.
This would appear to be a great spot to do these sorts of things since, by definition, ViewWillAppear gets called to notify the view controller that its view is about to be added to the view hierarchy.
There’s always a catch
With the new modal presentation, however, ViewWillAppear won’t get called on the presenting view controller when the presented view controller is dismissed, because technically its view never left the view hierarchy.
What’s the workaround?
So how can we use this modal presentation style but also get these lifecycle calls?
One way to get around it is to use the completion block in dismiss to do the things you might’ve done in ViewWillAppear.
This will not invoke ViewWillAppear, but you could do something like:
Why this isn’t my favorite solution
This is okay, but what if you don’t want to pass a reference of the presenting view controller? And what about the case where we don’t manually call dismiss, such as when a user swipes down to dismiss the modal?
Here’s something a little better
To find a solution where we don’t need to pass a reference of the presenting view controller and which also handles swipe gestures, we can take advantage of UIViewController’s beginAppearanceTransition
and... UIAdaptivePresentationControllerDelegate (rolls right off the tongue, right?)
What the hell is UIAdaptivePresentationControllerDelegate?
This delegate has been around, but two methods were recently added, presentationControllerWillDismiss and presentationControllerDidDismiss. These two get called when a user swipes to dismiss a modal view.
Which should we use?
presentationControllerWillDismiss gets called every time a user starts swiping to dismiss the presented view controller. This means that it can get called multiple times if a user starts to swipe down, changes their mind, and then swipes back down again.
Because of this, presentationControllerDidDismiss seems like the best place to write code that will manually invoke our presenting view controller’s ViewWillAppear method.
So how do we use it then?
To intercept this event, we first make the presented view controller conform to UIAdaptivePresentationControllerDelegate and implement the presentationControllerDidDismiss method:
In the presented view controller’s ViewDidLoad method, set the navigationController’s presentation Controller delegate to self:
You can alternatively set this in the code that presents the presented view controller:
Time for some magic
Now that we can intercept the point when a user swipes to dismiss, we need to manually invoke ViewWillAppear on the presenting view controller when the modal is dismissed.
[caption id="attachment_437" align="aligncenter" width="627"]
A nice view appears![/caption]
UIViewController to the rescue!
To do so, we can take advantage of the aforementioned beginAppearanceTransition and endAppearanceTransition.
These both take two parameters, isAppearing (whether or not the ViewController is coming into or out of the view hierarchy) and animated.
Go back to our presentationControllerDidDismiss implementation and add the following:
Here’s what’s going down:
- Let it be known that self (presented view controllers view) will be leaving the view hierarchy
- Let it be known that self.presentingViewController (the presenting view controller’s view) will be “re-appearing” in the view hierarchy. This will ensure that the presenting view controller’s ViewWillAppear method gets called
- Let it be known that both view controllers have finished their transition. Caution: ViewWillAppear will not get called if you forget to call end the appearance transition on either view controller because it will not know it has finished transitioning. (Don’t ask how I found that out)
Don’t forget to handle all cases!
This handles the case of invoking ViewWillAppear on presenting view controller when the user swipes away the modal, but what if an action triggers the dismissal? For example, the user taps a cancel button on the navBar, or a delegate method is triggered on selection of something like a contact in CNContactViewController?
Simply add the above begin and end appearanceTransition methods in the appropriate places, such as your cancelTapped or onContactValueSelected methods, and you’re good to go.
[caption id="" align="aligncenter" width="768"] Some cases with handles. Get it? It’s very funny.[/caption]
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Shane Johnson has done some work on a browser with Flex / AIR and CMIS (with Alfresco). This got me thinking that I should have a pod in FlexibleShare for CMIS api repositories (with drag / drop from desktop to it and between it and Alfresco DocLib / WCM pods).
30. January 2009
29. January 2009
Here is a screencam of an early prototype of FlexibleShare, an open source Flex based portal container / dashboard with Flex based pods for open source enterprise SW (Alfresco ECM, Alfresco Share, reporting/BI, BPM, portals):
This will initially focus on Flex+AIR, and later will have Flex+Browser support. Also plan to enable the pods to be used as Adobe Genesis Tiles. (Note: the Flex based pods for Alfresco ECM will support Adobe LiveCycle Content Services ES too).
Overview of the prototype:
The prototype currently uses the Esria dashboard sample (inside a Flex+AIR application) as its portal container (also looking at the Anvil project to provide more modular support for loading Flex portlets).
Alfresco ECM / FlexSpaces tab:
The first tab in the prototype screencam has pods based on FlexSpaces (Doc Lib, Search, Tasks, WCM, Local Files). The cool thing in AIR is that desktop drag / drop into the Doc Lib and WCM pods just “works”. The Local Files pod takes advantage of AIR apis to access local files and drag / drop from it into the Doc Lib and WCM pods works too. FlexSpaces support for Calais integration semantic tagging is also supported if enabled.
Flex-ification of Alfesco Share tab:
This tab has the early beginnings of some Flex UI (blog, wiki, discussions, site doc lib, calendar) for Alfresco Share backend. For the calendar, I am using code based on Ely’s interactive calendar. For the overall Share dashboard and Share site dashboards, using the AIR webkit HTML control to display them (so Ajax Surf dashlets can be used in them). Update: for blog, wiki, discussions, now working on more specific UI instead of FolderViews (instead will have post/comment tree, selected item content viewer pane, etc.) Update: Later will look into pods for individual Surf dashlets.
This tab is using a modified version of the flex based JasperReports flash viewer to display jrpxml files.
This has left in pods from the ESRIA dashboard sample. These use the Quietly Scheming chart animation effects.
This is based on a Flex version of the Pentaho dashboard sample.
This runs Liferay in a AIR webkit HTML control. Update: later will look into pods for individual Liferay portlets.
Update: Will look into pod for CMIS api repositories with drag / drop from desktop and with Alfresco pods
12. January 2009
Adobe TV added about 50 more MAX 2008 presentation recordings today including:
Genesis MAX 2008 presentation recording. This recording has both a presentation and a demo in it. (Genesis MAX 2008 presentation slides on SlideShare)
Also see my previous blog post on Adobe Genesis / Flex Portals / Open Source / FlexibleShare
5. January 2009
The flexspaces google code svn now has flexspaces+browser and flexspaces+air refactored to use the “presentation model” presentation design pattern. This will be in flexspaces 0.9.
Previously the component dir of FlexSpaces had components using either the Supervising Presenter design pattern or the Passive View design pattern (this is still available in the Alfresco forge in the 0.8 flexspaces source downloads). With the refactoring, the component package dir has been replaced with “presmodel” and “view” package directories. Still use Cairngorm with UM extensions in the control dir as before.
The flexspaces google code now also has some some cleanup work done: 1. model locator modularized to just be a locator of model classes. 2. The xml parsing of data coming back from web scripts has been moved to the delegates. These now return models and/or value objects.
I am finally getting around to adding support for Prana (now Spring ActionScript) to allow xml configuration of various things in flexspaces (attributes to show in properties / folder grids / advanced search, etc.) This is not in google code yet (will be in flexspaces 0.9).
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M: Ask HN: What book should I recommend to someone who just finished LPTHW? - mohsen
More Info:<p>I recently recommended Learn Python the Hard Way to someone who has no programming background.<p>He just finished the book and is asking for:<p>1)A python book to read next.<p>2)A book for another programming language that he can learn.<p>Any recommendation is appreciated.<p>Thanks
R: kachhalimbu
Zed himself recommends Django book as the Next Steps[1] at the end of LPTHW.
If he wants to dig deep into Python Dive into Python [2] would be a great book
to start working on next. For other language I would recommend some static
type language just to broaden his programming understanding. [1]
<http://learnpythonthehardway.org/book/next.html> [2]
<http://diveintopython.org/>
R: mohsen
did you mean to give a 3rd reference?
Thanks.
R: pavelludiq
After i learned python i went on to learn scheme,he might like "How to design
programs". <http://www.htdp.org/>
I haven't been paying attention to the world of python books for a while, but
i started with the O'Reilly books by Mark Lutz.
R: aorshan
If he wants to learn objective-C, Programming in Objective C by Stephen G.
Kochan is a great book
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HACKER_NEWS
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I still remember the first time I got a Python computer program that I wrote to work. I was auditing an Introduction to Python class in the second year of my PhD at the University of Arizona. While I am in the Rhetoric and Composition program there, I’ve always been fascinated with computer programming and computation, and thus over the span of my PhD, I’ve audited lots of classes in statistics, data science, and programming in Python. In one of these very first classes, I remember the immense joy I felt after hours of painstakingly write code to create very simple text-based visual graphics using a Python library called “turtle”. Using this library, one can define what movements they want their turtle (or their cursor) to make on a virtual canvas. For example, if one wanted to write the letter “I”, one would write instructions in Python to define how they would want their cursor to systematically move and write each individual edge or element that makes up the alphabet “I”. What you see below is a code snippet that does exactly this. Some of lines in this code give directions to move on the screen (like left, right etc.), while others tell it to start or stop writing (like pendown or penup etc.). The output would be a big alphabet “I” on a computer screen.
def drawI(turtle, size):
Even though from the perspective of our highly sophisticated digital landscapes, simply displaying the letter “I” on a computer screen doesn’t seem impressive at all, trust me, the first time you write computer code to do something even as basic as this, your perspective about how digital technologies work will completely change. When I ran this code for the first time and looked in amazement at the existential alphabet “I” staring back at me from the screen, this exercise gave me an approximation of the magic that happens whenever we interact with a computer:
With each input that we give, whether as a keystroke or a voice-command, the computer marshalls up millions of complex layers of computer code to process it and then an output is displayed to us. What a powerful form of rhetoric that mediates almost everything we do in daily life! And how much of its rhetorical-computational mechanisms remain invisible to us! Even right now as you are reading this blog and scrolling through this web-page something akin to this mechanism is happening. Such realizations that I got from learning how to code in Python are what had gotten me extremely interested and excited to study the world of computers, digital technologies, coding, and digital rhetoric.
Fast-forward to the current moment, after several years of experimentation with making coding literacies—particularly Python-based data mining and data visualizations—more accessible to digital rhetoric and writing scholars through holding workshops and creating accessible tutorials in the form of computational notebooks, I am now gearing up to work on my dissertation where I will be studying the impact of emerging large language model technologies (LLMs) or generative artificial intelligence tools (GenAI) like ChatGPT on rhetorical and literacy practices.
Image1: Anuj Gupta piloting a virtual reality data visualization at Howard University’s Hello Black World Exhibition (2023)
At this point in my journey, I’m really excited to be a DRC Fellow as I will get to connect with and serve DRC’s reader base through a range of initiatives that will help us in the fields of digital rhetoric, technical communication, and computers and composition wrestle with the huge wave of Large Language Models (LLMs) that is transforming our digital rhetorical landscapes.
Having taught digital writing in both India and the United States, I also look forward to bringing a transnational perspective to the DRC’s work. As an international student, I have firsthand knowledge of how global inequities shape people’s access to digital resources. My positionality would enable me to contribute to the DRC’s resources in a way that helps teachers across the globe navigate the ongoing LLM crisis in a thoughtful manner. I see my service with the DRC as an opportunity to contribute to the subject of digital rhetoric, increase my own understanding of its uses, and improve the accessibility and inclusion of digital technologies in global academia, especially in the global south. To learn more about my work, please visit my website (here), my Google scholar page (here) or connect with me on Twitter (@mettalrose).
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OPCFW_CODE
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We have changed our policy for SSH
to better our security on all the servers. All clients have
been added an SSH icon in their Domain Manager. Via this addition
you will be able to enable SSH access to your account.
To setup an
RSA key follow the instructions below.
Please note that you do not have to
have a RSA to gain access. You can also leave the RSA field
blank, and it will take you to a second screen that will allow
you to put in where you are connecting from. (by IP address)
If you have a static IP, just enter the IP address that you
connect to the net with and hit submit. If you have a dial-up
and you have a different IP every time that you connect, just
put in the Class B that you connect with. Lets say that your
IP address right now is 184.108.40.206.
IP --> 220.127.116.11
Class A --> 65.*.*.*
Class B --> 65.123.*.*
Class A addresses will not be allowed
due to the number of IPs that can be connected from. So to
put in your Class B you would put "65.123.*.*" in the field.
But now lets say that you connect 3 different times and get
3 different Class B's, just put them all in.
RSA authentication uses a public-private
key pair to authenticate and log in to an SSH1 Server. It
offers a higher level of authentication security than password
authentication by requiring both the private key and the passphrase
that protects the private key in order to complete authentication.
Setting up RSA Authentication for a
SecureCRT session is a multi-step process. Identity Files
are created with the RSA Key Generation Wizard. The identity
file is defined for global or session-specific use in the
Advanced SSH Options dialog. Then the public key is added
to the authorized_keys file located on the SSH server.
Note: Only SSH1 supports RSA authentication.
To create an RSA identity file:
Open SecureCRT and goto Options.
1. In the Connect dialog, select the
SSH1 session with which you would like to use the identity
2. Open the Session Options dialog
and in the Connection category, click the Advanced button.
When Advanded is clicked, an alert
box is activated and states "Changes on the Advanced SSH
Options dialog will not take effect until the next time you
connect using this session."
3. Select the General tab and click
on the Create Identity File button in the Identity Filename
4. Follow the instructions in the RSA
Key Generation Wizard to create your identity files. Once
your public-private key pair has been generated by the RSA
Key Generation Wizard, you will be prompted for the path and
filename in which your private key will be stored. Be sure
to specify a secure location for this file such that you are
the only individual with access to it. The public key will
be placed in a file with the same basename as the private
key file, but with an extension of .pub.
Once you have created the RSA key you
will need to open the file in a text editor and then copy
and paste it into the field that is provided in the first
screen of the SSH section in the Domain Manager.
Congratulations, you have created your
RSA public and private key pair.
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OPCFW_CODE
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By Kaczynski , Mischaikow , Mrozek
Read Online or Download Algebraic Topology A Computational Approach PDF
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Die Methode der Finiten Elemente ist heute ein Standardverfahren zur Berechnung von Flächentragwerken im konstruktiven Ingenieurbau mit Hilfe des pcs. In diesem Buch werden die theoretischen Grundlagen der Methode für Stab-, Platten- und Scheibentragwerke dargestellt, soweit sie für das Verständnis des Verfahrens und eine qualifizierte Anwendung erforderlich sind.
This quantity presents a range of the papers that have been provided on the 11th convention on Computational Linguistics within the Netherlands (Tilburg, 2000). It provides a correct and updated photo of the full of life scene of computational linguistics within the Netherlands and Flanders. the quantity covers the full variety from theoretical to utilized study and improvement, and is accordingly of curiosity to either academia and undefined.
This e-book offers a step by step dialogue of the 3D integration method for the improvement of compact system-on-package (SOP) front-ends. a variety of examples of fully-integrated passive development blocks (cavity/microstip filters, duplexers, antennas), in addition to a multilayer ceramic (LTCC) V-band transceiver front-end midule display the progressive results of this procedure in RF/Wireless packaging and multifunctional miniaturization.
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Additional info for Algebraic Topology A Computational Approach
We do this for two reasons. First, each interval can be represented by a graph and so using the types of arguments employed in the previous section we can compute the homology. Second, we can actually draw pictures of the functions. This latter point is to help us develop our intuition, in practice we will want to apply these ideas to problems where it is not feasible to visualize the maps, either because the map is too complicated or because the dimension is too high. With this in mind let X = ;p2 2] R, Y = ;2 4] R and let f : X !
MOTIVATING EXAMPLES 46 a linear operator, we can match the topological expression bd ( a b] b c]) = fag fcg with the algebraic expression @ ( a b] + b c]) = @ ( a b]) + @ ( b c]) = a+b+b+c = a + 2b + c = a + c: Continuing in this way we have that @ ( a b] + b c] + c d] + d e]) = a + b + b + c + c + d + d + e = a + e: As an indication that we are not too far o track observe that on the topological level bd 0 1] = fag feg. 2. 2: Topology and algebra of boundaries in ;1. e. algebraic objects whose boundaries add up to zero, are topologically nontrivial.
E. elements of the kernel of the boundary operator. So de ne Z0(G Z2) := ker @0 = fv 2 C0(G Z2) j @0 v = 0g Z1(G Z2) := ker @1 = fv 2 C1(G Z2) j @1 v = 0g Since @0 = 0 it is obvious that Z0(G Z2) = C0(G Z2). We also observed that cycles which are boundaries are not interesting. To formally state this, de ne the set of boundaries to be B0(G Z2 ) := im @1 = fv 2 C0(G Z2 ) j 9 e 2 C1(G Z2 ) such that @1 e = vg B1 (G Z2) := im @1 = f0 2 C0(G Z2 )g Observe that B0 (G Z2) C0(G Z2 ) = Z0(G Z2 ). Since we have not yet de ned @2 we shall for the moment declare B1(G Z2 ) = 0.
Algebraic Topology A Computational Approach by Kaczynski , Mischaikow , Mrozek
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OPCFW_CODE
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[llvm-dev] Debugging Docs and llvm.org/docs/
Tanya Lattner via llvm-dev
llvm-dev at lists.llvm.org
Fri Apr 7 11:18:35 PDT 2017
> On Apr 7, 2017, at 8:09 AM, Renato Golin <renato.golin at linaro.org> wrote:
> On 7 April 2017 at 15:50, Tanya Lattner <tanyalattner at llvm.org> wrote:
>> So, building the docs isn't the issue I feel is the problem. The script we
>> have works totally fine. The problem is people breaking the docs.
>> So how is this better?
> I don't know enough about the website, but there are other problems in
> our infrastructure:
> * We need to manually update Sphinx. People out there can have much
> newer versions, which accept newer syntax, and it doesn't break on
> their side, but it breaks on the server.
Upgrading is generally simple. I think the bigger issue is being out of sync with whatever the person is testing. You have this problem with CMake and other tools and usually specify a minimum version to ensure features work. I assume that this is done with Sphinx?
If anyone changes that, they would need to notify the administrators of the WWW server or better yet, they could upgrade this themselves (code owner only or trusted one). Sphinx upgrades don’t usually require a reboot or apache restart so it would be minimal disruption.
> * We have buildbots that validate the docs, but again, it's a
> completely separate machine, with a different version still (at least
> * The buildbot doesn't push its builds to the server, nor it's
> guaranteed to have the same version as the actual builder, so
> maintenance is hard.
> * The server process doesn't warn people when it breaks. At least not
True. I think having a buildbot for testing docs would be ideal. It doesn’t need to be the same machine as the WWW server and I would prefer separate. But it needs to be using the same Sphinx version which we can control. I have modified the scripts to give status to a mailing list (on new server, http://lists.llvm.org/pipermail/www-scripts/2017-April/002264.html) but modifying them to directly alert the person who broke it would be re-inventing the wheel.. so a buildbot would be better for that probably. But, it could be easy to add to the script maybe.
> What does this website fix?
> * Can it report failed builds? Or at least show on a public webpage
> what's the problem?
> * Can we email people when the docs are broken? At least a generic
> list like llvm-admin?
> * How often Sphinx is updated on the website? Is it always the most
> modern version?
I think this last issue is still the biggest. We need this to be in sync with what developers do. I need to go look at the website to find out their policy.
Having a few moments to think about this (sorry its spring break week here, family obligations), there are other docs on the WWW server that use LLVM/CLang tools and sphinx that could not be offloaded (attributes generation). Decoupling them from the build might be more trouble than its worth.
But these are just things that need to be thought through more.
> I think those three points are true, but I don't know for sure. If
> they are, at least some of the problems are fixed.
> Another solution is to make the buildbot push the docs somewhere, so
> at least we have a consistent process, and whatever happens on the
> public bot, happens on the docs.
Possibly an option. Getting a buildbot for this would be easy and not too expensive from my perspective. We could possibly have other uses for it.
> But that seems more involved and problematic (SSH/FTP keys, etc.),
> which may defeat our "move to public infrastructure to avoid costs"
Well, I am more of the opinion is that we do whats best for the project and not what is free or cheap. So its good to evaluate the options. Its not that expensive for us to host the docs and website, but I would like to solve the Sphinx version out of sync problem. But if this website turns out to be the best route, then thats ok too. Or maybe a buildbot is the best idea given that I have docs that rely on Clang/LLVM tools. Lets keep talking about it :)
> In that sense, this website is somewhat similar to hosting our code on
> GitHub. It's someone else's problem.
More information about the llvm-dev
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OPCFW_CODE
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from prov.server.models import Container
from prov.persistence.models import PDRecord
from prov.model import PROV_ATTR_TIME, PROV_ATTR_STARTTIME, PROV_ATTR_ENDTIME
from django.db.models import Q
from sets import Set
def _get_containers(rec_set):
''' Function returning a django Query_Set of Containers given a Set of record ids.
The Query_Set is composed of the Containers which contain any of the records in the 'rec_set'
'''
''' Get all the top level bundles' ids in final Set'''
final_list = Set(rec_set.filter(bundle=None).values_list('id', flat=True))
''' Get the rest records' parents' ids in temp Set '''
temp_list = Set(rec_set.filter(~Q(bundle=None)).values_list('bundle', flat=True))
'''Do until only top level bundles reached'''
while len(temp_list) > 0:
''' Fetch the bundles stored in the temp Set (the parents) '''
temp_list = PDRecord.objects.filter(id__in=temp_list)
''' Append all the top level bundles to final Set '''
final_list = final_list.union(Set(temp_list.filter(bundle=None).values_list('id', flat=True)))
''' Again get the rest records' parents' ids in temp Set '''
temp_list = Set(temp_list.filter(~Q(bundle=None)).values_list('bundle', flat=True))
return Container.objects.filter(content__id__in=final_list)
def search_name(q_str=None, exact=False):
if not q_str:
return Container.objects.none()
if exact:
return Container.objects.filter(content__rec_id__iexact=q_str)
return Container.objects.filter(content__rec_id__icontains=q_str)
def search_id(q_str=None, exact=False):
if not q_str:
init_set = PDRecord.objects.none()
if exact:
init_set = PDRecord.objects.filter(rec_id__iexact=q_str)
else:
init_set = PDRecord.objects.filter(rec_id__icontains=q_str)
return _get_containers(init_set)
def search_literal(literal, q_str, exact=False):
#literal = literal.replace(':', '#')
if not q_str:
lit_set = PDRecord.objects.none()
''' Get all the records who are attached to LiteralAttributes with the constraints:
LiteralAttribute.name = literal, LiteralAttribute.value matches q_str '''
if exact:
lit_set = PDRecord.objects.filter(literals__name__iexact=literal, literals__value__iexact=q_str)
# lit_set = LiteralAttribute.objects.filter(name__contains=literal, value=q_str)
else:
lit_set = PDRecord.objects.filter(literals__name__iexact=literal, literals__value__icontains=q_str)
# lit_set = LiteralAttribute.objects.filter(name__contains=literal, value__contains=q_str)
# rec_set = Set(lit_set.values_list('record', flat=True))
return _get_containers(lit_set)
def search_timeframe(start=None, end=None):
if not start and not end:
return PDRecord.objects.none()
''' The fact that dates are kept as strings in the DB require this step if you pass datetime object '''
from datetime import datetime
if isinstance(start, datetime):
start = str(start).replace(" ", "T")
if isinstance(end, datetime):
end = str(end).replace(" ", "T")
''' The search for time is done in the following manner:
if the literal type is PROV_ATTR_TIME or PROV_ATTR_STARTTIME we are searching in the
time interval [start:end] and if it is PROV_ATTR_ENDTIME the interval is (start:end].
If start or end is None you can imagine as setting start=-Inf and end=+Inf respectively.
At least one must be provided'''
if start and end:
lit_set = PDRecord.objects.filter((Q(literals__prov_type__in=[PROV_ATTR_TIME, PROV_ATTR_STARTTIME]) &
Q(literals__value__gte=start) & Q(literals__value__lte=end)) |
(Q(literals__prov_type=PROV_ATTR_ENDTIME) &
Q(literals__value__gt=start) & Q(literals__value__lte=end)))
elif start:
lit_set = PDRecord.objects.filter((Q(literals__prov_type__in=[PROV_ATTR_TIME, PROV_ATTR_STARTTIME]) &
Q(literals__value__gte=start)) |
(Q(literals__prov_type=PROV_ATTR_ENDTIME) &
Q(literals__value__gt=start)))
elif end:
lit_set = PDRecord.objects.filter(Q(literals__prov_type__in=[PROV_ATTR_TIME,PROV_ATTR_STARTTIME,PROV_ATTR_ENDTIME]) &
Q(literals__value__lte=end))
# rec_set = Set(lit_set.values_list('record', flat=True))
return _get_containers(lit_set)
def search_any_text_field(q_str, exact=False):
''' Search in the record id and all LiteralAttribute.values to find bundles matching q_str'''
if not q_str:
PDRecord.objects.none()
if exact:
# namepsace_set = PDNamespace.objects.filter(Q(prefix=q_str), Q(uri=q_str))
# record_set = PDRecord.objects.filter(Q(rec_id=q_str), Q(rec_type=q_str))
# attribute_set = RecordAttribute.objects.filter(prov_type=q_str)
# literal_set = LiteralAttribute.objects.filter(Q(prov_type=q_str), Q(name=q_str),
# Q(value=q_str), Q(data_type=q_str))
# record_set = PDRecord.objects.filter(rec_id=q_str)
# literal_set = LiteralAttribute.objects.filter(value=q_str)
rec_set = PDRecord.objects.filter(Q(rec_id__iexact=q_str) | Q(literals__value__iexact=q_str))
else:
# namepsace_set = PDNamespace.objects.filter(Q(prefix__contains=q_str), Q(uri__contains=q_str))
# record_set = PDRecord.objects.filter(Q(rec_id__contains=q_str), Q(rec_type__contains=q_str))
# attribute_set = RecordAttribute.objects.filter(prov_type__contains=q_str)
# literal_set = LiteralAttribute.objects.filter(Q(prov_type__contains=q_str), Q(name__contains=q_str),
# Q(value__contains=q_str), Q(data_type__contains=q_str))
# record_set = PDRecord.objects.filter(rec_id__contains=q_str)
# literal_set = LiteralAttribute.objects.filter(value__contains=q_str)
rec_set = PDRecord.objects.filter(Q(rec_id__icontains=q_str) | Q(literals__value__icontains=q_str))
# rec_set = Set(namepsace_set.values.list('pdbundle', flat=True))
# rec_set = rec_set.union(Set(record_set))
# rec_set = rec_set.union(Set(attribute_set.values_list('record', flat=True)))
# rec_set = rec_set.union(Set(attribute_set.values_list('value', flat=True)))
# rec_set = rec_set.union(Set(literal_set.values_list('record', flat=True)))
# rec_set = Set(record_set.values_list('id', flat=True))
# rec_set.union(Set(literal_set.values_list('record', flat=True)))
return _get_containers(rec_set)
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STACK_EDU
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However, I initially used a 1024-bit key. If you specify a passphrase they would need to know both your private key and your passphrase to log in as you. This padding ensures that m does not fall into the range of insecure plaintexts, and that a given message, once padded, will encrypt to one of a large number of different possible ciphertexts. Instead, we utilize fwrite which is going to write the encrypted message buffer to the file verbatim. Security experts are projecting that 2048 bits will be sufficient for commercial use until around the year 2030. But you may not be sure of the extent of each of these these effects. The passphrase is used to protect your key.Next
Here's the since the library itself and the website it comes from have next to no documentation. Branch prediction analysis attacks use a spy process to discover statistically the private key when processed with these processors. Therefore, people should not see Debian's preference to use 4096 bit keys as a hint that 2048 bit keys are fundamentally flawed. A new value of r is chosen for each ciphertext. His discovery, however, was not revealed until 1997 due to its top-secret classification. Hughes, Maxime Augier, Joppe W. To enable Bob to send his encrypted messages, Alice transmits her public key n, e to Bob via a reliable, but not necessarily secret, route.Next
Router config crypto key generate rsa general-keys The name for the keys will be: myrouter. Using seeds of sufficiently high entropy obtained from key stroke timings or electronic diode noise or from a radio receiver tuned between stations should solve the problem. Run your own tests and get your own results. If someone else gets a copy of your private key they will be able to log in as you on any account that uses that key, unless you specify a passphrase. Are things slowly turning in favor of 4096? Passphrases Passphrases allow you to prevent unauthorized usage of your key by meaning of protecting the key itself by a password. The hack that breaks a 2048 bit key in 100 hours may still need many years to crack a single 4096 bit key. All of the above factors contribute to the increased time it takes to generate larger keys, however this aside, it sounds like this library just isn't particularly fast.Next
The goal is to increase the root cert and our routers cert to 4096-bits. No polynomial-time method for factoring large integers on a classical computer has yet been found, but it has not been proven that none exists. Rivest, unable to sleep, lay on the couch with a math textbook and started thinking about their one-way function. Thus, it might be considered to be a part of the private key, too. So: let's measure all these things.
This attack was later improved by. The tells us that as prime numbers get bigger, they also get rarer so you have to generate more random numbers in order to find one that's prime. And are your documents completely insecure if you are using them? The size of Key Modulus range from 360 to 2048. To alter the comment just edit the public key file with a plain text editor such as nano or vim. Imagine in the year 2040 you want to try out a copy of some code you released with a digital signature in 2013. The parameters used here are artificially small, but one can also.
The maximum for private key operations prior to these releases was 2048 bits. Rivest and Shamir, as computer scientists, proposed many potential functions, while Adleman, as a mathematician, was responsible for finding their weaknesses. As of 2010 , the largest factored was 768 bits long 232 decimal digits, see. Generating Keys Generating public keys for authentication is the basic and most often used feature of ssh-keygen. We need to use fread which will put the encrypted message back into the encrypt buffer which we can then use to send to the decrypt function above. In real-life situations the primes selected would be much larger; in our example it would be trivial to factor n, 3233 obtained from the freely available public key back to the primes p and q. Each generated key can be protected by a passphrase.Next
A message-to-be-transferred is enciphered to ciphertext at the encoding terminal by encoding the message as a number M in a predetermined set. The traffic between systems are encrypted. However, at 1998, Bleichenbacher showed that this version is vulnerable to a practical. A best practice is to determine how long you plan to use a specific key and then select a key length based on that decision. Keys of 512 bits have been shown to be practically breakable in 1999 when was factored by using several hundred computers, and these are now factored in a few weeks using common hardware. However, a longer modules take longer to generate see the table below for sample times and takes longer to use. The remainder or residue, C, is.Next
The prime numbers must be kept secret. What are the pros and cons of one key length versus the other? It is important that the private exponent d be large enough. Exploits using 512-bit code-signing certificates that may have been factored were reported in 2011. After executing the command it may take some time to generate the keys as the program waits for enough entropy to be gathered to generate random numbers. Some experts believe that 1024-bit keys may become breakable in the near future or may already be breakable by a sufficiently well-funded attacker, though this is disputable.Next
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OPCFW_CODE
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WeThinkCode_ offers a free two-year coding course in Johannesburg. Their vision as a non-profit organization is to unlock youth potential by closing the digital skills gap in Africa by teaching programs like game design, app design, cloud computing, cryptography, artificial intelligence, web design, malware, and more. WeThinkCode_ focuses on providing access to real world experience through internships and a clear path to employment upon graduation.
Great learning environment, great course, must have skills
99.8% employment rate
Can't think of any...
Created 1 year ago
WeThinkCode_ in Johannesburg started with a massive Bootcamp where you learn how to use the terminal then c, you get graded by your peers and ultimately moulenette(The Computer). Do non-technical activities too through the course, you pick a track to pursue at the time it was 3 modules then for second-year students the options become more. You also get to qualify to do an internship at one of the corporate sponsors for 4 months. Then for your second year, you do another Bootcamp and unlock...
-Peer-to-peer learning is great
-Staff sometimes not as understanding of the pressure students are under
-Location of the school is not the safest when you leave the premises
-Rigid curriculum with a blank approach
-Robotics, blockchain, ML is not included in the...
A decent place to learn software engineering.
Created 1 year ago
Overall I've had good experience at Wethinkcode. They teach you avery important skill and that's self-growth. You're all on your own at Wethinkcode. That's where the beauty in it lies. You choose what you want to improve at and the pace is set by yourself. You'll learn to be more organized, self-motivating and you'll definitely have exposure to cutting edge tech and software engineering concepts.
- They've got really good looking Macs to work on.
- You'll become a terminal guru in a matter of months
- They'll really push you to your limits
- Wethinkcode is still a pretty new organization so they're still finding their way around.
- Students whom already have a very strong coding background will perform much better than students who have never been exposed to it.
Enjoyed my time there, project where challenging that increased in difficulty at a really good pace and helped me learn so much really quickly, the peer-to-peer system they had help me a lot personally solve issues using advice from others and I really liked it
Though the school has changed things a bit since went there I still recommend it to others as a good kick-start to your career,
Fast learning, teaches you how to pick up new things quickly and well
Peer-to-peer system helps those who need it
School is free and they try help you get a job afterwards
The stipend the supply isn't too high so students need support some other way as well (family or savings)
It's full time commitment for 2 years
Job after graduating is not guaranteed but I had no issue getting one
So bootcamp at WeThinkCode_ is tough, it's really not for everyone, you absolutely have to really want to be a software developer and engineer and not be doing it just for something to do because those people drop out fast. Bootcamp is 3 and a half weeks I think with 4 exams and it's a peer to peer environment so I had to make friends fast because that's how you survive, you learn from each other and you ask for help it's the fastest choice in figuring out solutions because it's very likely...
My 4 month internship, being able to learn multiple coding languages, having mentors in the tech industry, the environment is amazing its not all games and hard work 24/7.
WeThinkCode_ is a peer to peer learning environment. We learn from each other and have really hard bootcamps. It's all worth it. WeThinkCode gives us the tools, tips and tricks to not only survive, but strive in a work environment.
Work on your own time
Learn at a steady pace
Help is always available if you ask
Advantage of technical experience above a graduate from university
Teaches time management.
It's a peer to peer so you'll need to get out of your comfort zone.
Can be stressful
My experience at WeThinkCode was really amazing. It was mostly missed with roller-coaster rides and learning new things pretty much every day. I enjoyed my experience and really learned a lot. From communicating with my peers, to understanding how to break down big projects to smaller chunks that I will be able to work of off, and manage easily.
Have the ability to learn new things and keep growing.
Never coming to a place where I can say I know everything and seizing all the opportunities I have to learn from others, as well as ask for help.
Understanding that there is no such...
Well I would say in my final year things were a lot hectic cause there was a lot of change going on, which didn't the experience really comforting.
The way in which the structural change was implemented was not really thoughtful in terms...
Created 2 years ago
WeThinkCode_ (WTC) is a fantastic institute to learn programming and make friends. The there are no dedicated teachers and the curriculum is built on a peer-to-peer system, meaning that your peers are your teachers, and you are theirs.
They offer a 2 year long curriculum(either in CPT or in JHB, soon to be in Durban as well), where you learn a multitude of languages. C, Web Development (You can often pick any language for we dev.), Java, C++, Assembly. 4 Months of every year is dedicated to...
Curriculum is very flexible
Work at your own pace
Many people to socialize with
WTC listens to it's student and tries to help students where ever possible
The only place that the school has disappointed me in is communication. Sometimes we (the students) need information, but we have to wait for word from the Joburg campus, which the takes a long time.
My experience at WeThinkCode
Created 2 years ago
When I started WeThinkCode I had no experience of coding whatsoever. But lucky me I was helped and advised by my boyfriend whose doing software engineering also, so he really made things easier for to understand and also my peers at WeThinkCode were helpful in terms of learning new concepts and helping each other on finishing up projects before the deadline. So the wethinkcode environment is very nice because you get to help each other on a day to day basis.
The best part for me is that wethinkcode can also arrange hackerank or hackathons trips for some interested students to attend.
Okay we all know that people don't learn the same way, but here at WeThinkCode it's like they expect you to be on the same level. So when you don't meet their deadlines that's where they chase you out of the program.
WeThinkCode_ was overall fantastic, helped landing a job and getting started. I found, although, it was lacking an updated curriculum. It should've touched JS a lot more than it did. Something else it was lacking was instructors altogether, which is nice to learn how to learn, but it caused issues when not knowing common and standard practises.
Overall, they got me a job and I filled all the holes that WTC didn't pretty quickly.
* Flexible times (I could work from home any number of days if I wanted to.)
* Work at my own speed (If I wanted to finish the curriculum faster than I was meant to I could, since it's a teach yourself course)
* Located in bad area.
* Outdated curriculum.
* No instructors/ tutors.
The We Think Code programs is an intense 2 year program that aims at teaching individual with the ability to solve problem to be able to use their problem solving ability through coding.
The program teaches you the basics of programming (low level programming), this helps the individual to properly understand/appreciate what the higher level languages do for you (eg allocating or freeing of memory).
the environment forces...
The learning happens at a fast pace and this prevents most students from properly understanding a concept.
I have had an awesome experience so far. I especially enjoy the freedom that is provided to students, which allows us to find our feet personally within a professional environment. WeThinkCode_ does a great job at creating a comfortable environment together with strict academic standards. Especially with group projects where communication and comfortability with other people are key, as well as performance. We are being set up for the real world through this experience, which compared to other...
Amazing resources to work with.
Fantastic environment to grow professionally.
Great management of students.
Super fun place to learn.
There is no procedural guidance when tasked with a project.
Very tough curriculum, a lot of hard work required to succeed.
WeThinkCode_ offers a wide range of excellent courses to choose from.
No matter which course you choose,
the WeThinkCode_ curriculum has been crafted and tested to ensure you leave the program with the skills you need to launch a rewarding new career.
But the cost of WeThinkCode_ courses shouldn’t be the only thing you consider.
There are a variety of financing options available to help you pay for WeThinkCode_'s cost.
Minimum skill level:
This is a 2-year peer-to-peer programming course where students work with each other to solve problems. Students are required to take a 4-week intensive bootcamp to be invited to enroll in the 2-year course. Students will learn skills applicable to game design, app design, cloud computing, cryptography, artificial intelligence, web design, malware and more.
Is WeThinkCode_ worth it? Let’s look at the WeThinkCode_ outcomes numbers.
403 WeThinkCode_ graduates have found rewarding careers at high-profile companies like
BBD, BCX, FNB South Africa.
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OPCFW_CODE
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12:39 < solios> you know those ripcord things that lawnmowers have?
12:40 < solios> where you go yank and the mower goes uh and you go YANK and the mower goes UH and you go YANK YOU FUCK and the mower goes BRUUUUAAAAAAAAAAAAAAAAAAAHHHHHHHHHHHHH and eats your feet?
12:40 <@rjbs> yes.
12:40 < solios> I need one of those for my brain.
12:40 < solios> :|
It's a longstanding fact that I use Photoshop 5.0.2 with multiple processor support disabled. This is because my workplace does not have a 5.5 license for the mac. We have 6, 7, and 8. I also have 8 installed on my workstation, though I use Photoshop 5.0.2 in Classic. On a G5. If I open CS, it's by accident. There are many, many, many reasons why I stick with five. Recently, my Angst resurfaced and an adequate analogy fell out of my mouth. An analogy that quite accurately describes the differences between 5 and 6+.
22:40 < solios> Me using Gimp is like Stallman using Vi.
22:41 < solios> Me using Photoshop is like Stallman using Emacs.
22:41 < solios> except he wrote emacs. :P
22:41 < solios> or improved it, or something.
22:43 < @bda> He wrote it.
22:43 < solios> I thought so.
22:44 < solios> then I remembered there were flavors, and got confused.
22:44 < solios> basically, it's a workflow thing.
22:44 < ejp> flavors of Stallman?
22:44 < solios> Photoshop 6+ and Gimp are Not Photoshop Five.
22:44 < solios> :|
22:44 < ejp> for good reason.
22:44 < ejp> :)
22:44 < solios> NO.
22:45 < solios> Has Vi, Vim, or Emacs changed fundamentally in the last five years?
22:45 < ejp> I dunno
22:46 < @bda> Not fundamentally, no. They've added useful features I've never used.
22:46 < @bda> Like folding in vim.
22:46 < solios> See?
22:46 < @bda> vi itself hasn't changed in forever, afaik.
22:46 < solios> PS 6, 7, and 8 have added useful features I never use.
22:47 < solios> While at the same time changing fundamnetally.
22:47 < solios> and starting with seven, saving takes three steps instead of two for Big Shit.
22:47 < solios> which means a 900 meg file takes twice as long to save in 7 as it does in 5.
22:48 < @bda> Yeah, but vim/emacs additions don't force us to use the application in a different, annoying way. :)
22:48 < @bda> They are added and we are not required to use them. :)
22:48 < solios> Right.
22:48 < solios> Whereas you're not required to use the new PS bullshit, but they've CHANGED THE INTERFACE ANYWAY.
22:49 < solios> it's like moving your girlfriend's vagina when you're not paying attention.
22:49 < @bda> ..what?
22:49 < solios> You know where the hoohoo is, right?
22:50 < ejp> solios: chicks dig solies
22:50 < solios> Well, say your girl wants to sex you up something fierce, only when the pants come off, her cooter's moved under her left shoulderblade.
22:50 < solios> THAT IS PHOTOSHOP SEVEN.
17:13 < @rjbs> AHOY
17:14 < @rjbs> solios: did you get any breast pictures yet?
17:14 < ejp> solios: can't she just login at http://mail.freudian-slip.org/ ?
17:14 < solios> ejp: dunno
17:14 < solios> rjbs: :x
17:15 < solios> ejp: she got forwarding to SAB working somehow/
17:15 < solios> http://www.side7.com/esquire/wav/tv/FlyingCars.wav
17:16 < @rjbs> solios: what, did you or didn't you? :)
17:16 < solios> rjbs: :x
17:17 < @rjbs> ??
17:17 < @rjbs> solios: she says "send him boob shots"
17:17 < @rjbs> so...
17:17 < @rjbs> you just don't wanna share.
17:17 < @rjbs> ack, or maybe they're cowgirl boobs
17:17 < solios> :X
17:19 < y0shi> or cow boobs
17:19 < solios> >.<
17:19 < ejp> cow boobs are squeeable.
17:19 < ejp> odd word.
17:20 < solios> squeeable?
17:20 < ejp> was going for 'squeezable'
17:21 < @rjbs> SQUEEEE SQUEEEE SQUEEEEEEEEEEEEEEE SQUEEEEEEEEEEEEEEEEEEEEEEEEEEE HUAAA HUAAA HUAAAA SQUEEEEEEEEEEEEE
17:21 < y0shi> no, those are pig boobs
17:22 < ejp> damn Swede.
17:24 < solios> uh.
17:24 < solios> rjbs: o_O
17:24 < @rjbs> solios: AAAASQUEEEEEEEEE
17:24 < @rjbs> HAULGAULAHUALGUALHGUALHUALGAHLUAGH
17:25 -!- solios changed the topic of #tildedot to: < @rjbs> HAULGAULAHUALGUALHGUALHUALGAHLUAGH
17:25 * solios dies
17:25 < solios> rjbs++
17:28 < @rjbs> solios: btw...
17:28 < @rjbs> solios: UUNNGGAAAQUAAAASQUWEEEEEEEEEEEEEEEEEEEEEEEEEE
17:29 < @rjbs> solios: you got a purty mouth. lemme see you just drop them pants.
17:29 < solios> sadfkljkjk.
17:29 < solios> o_o
17:31 < @rjbs> that's right.
17:31 < @rjbs> just take'm riiight off.
17:31 < @rjbs> solios: you've seen Deliverance, of course..?
17:31 < y0shi> if he hasn't, this is that much better
17:32 < solios> no, I haven't.
17:32 * ejp hasn't either
17:32 < y0shi> what i'm trying to say is we're about to have buttsex
17:32 < solios> I spammed part of this at xeno.
17:32 < solios> 17:31 < @xeno> ....
17:32 < solios> 17:31 < @xeno> that wouldn't have been nearly as freaky if Dueling Banjos hadn't played just a few minutes ago
Dogs and pot and loud music, oh my.
22:43 < solios> fagbot: doot for my neighbors being obnoxious. Again.
22:43 < fagbot> FUCK THAT NOISE
CNN never ceases to amuse me:
13:32 * solios thinks about redesigning mercury.
13:32 < @xeno> ...
13:32 < @xeno> omfg
13:32 < @xeno> I keel you
13:32 < @xeno> LEAVE IT BE
13:32 < @solios> O_o
13:32 < @solios> o_O
13:32 < @xeno> (new design)++
13:33 < @solios> if I redesign it again, I'll leave LOC alone.
13:33 < @solios> k?
13:33 < @solios> k.
13:33 < @xeno> k!
13:33 < @xeno> you know, if you were getting paid for every redesign you've done, i'd be a millionaire by now
13:33 < @solios> yep.
13:33 < @xeno> wait.
13:33 < @xeno> er...
From homeslice: A precise, exacting synopsis of why I'm never going to breed. Ever.
12:02 < ejp> a client is bitching because an email to them got bounced back.
12:03 < ejp> so I looked.
12:03 < ejp> it has no To line.
11:51 < @rjbs> xserve g5
11:51 < @rjbs> single proc.
11:51 < solios> OMFGWTF
11:51 < solios> WHERE?!
11:51 < @rjbs> ah, wait, no.
11:51 < @rjbs> wtf.
11:52 < solios> fag.
11:52 < @rjbs> worthless people in #macrumors
11:52 < solios> yes.
11:52 < @rjbs> you're thinking of macosrumors
11:52 < @rjbs> or something.
11:52 < @rjbs> you always forget who the real assholes are.
11:52 < @rjbs> ;)
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OPCFW_CODE
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Mr Robot CTF
This article requires the knowledge of linux, enumerating services ports. This box is completely for the beginner level challenge
Task 1 Connect to our network
- To deploy the Mr. Robot virtual machine, you will first need to connect to our network.
2. Connect to our network using OpenVPN. Here is a mini walkthrough of connecting:
3. Use an OpenVPN client to connect. In my example I am on Linux, on the access page we have a windows tutorial.
4..When you run this you see lots of text, at the end it will say Initialization Sequence Completed
5. You can verify if you are connected , by looking on your access page. Refresh the page
5.You are now ready to use our machines on our network!
6.Now when you deploy material, you will see an internal IP address of your Virtual Machine.
Task 2:- Hack the machine
To find the first flag, will start with enumeration by running nmap
#nmap -sS -sV -O 10.10.245.158
The port 80& 443 is open, which indicates the website is running
Open the web-server
As, we dont find any information, we will run gobuster
#gobuster dir — url http://10.10.245.158/ — wordlist /usr/share/wordlists/dirb/common.txt
- What is key 1?
Since, port 80 is open, we will directly check in “Robots.txt” file
By checking the robots.txt directory, we got 3 files
By checking the three files, we got the first flag in Key-1-of-3.txt
By checking the directories one-by-one from the result of gobuster.
In /dashboard we got a login page of wordpress
We continue searching in the directories of the gobuster
In /license directory we got a hash password
By decoding it to base64, we got the username & password for wordpress login
After logging in, In dashboard page we dont find any information, so will search in google for wordpress reverse shell
From the hacking articles i used the 2nd method of Injecting Malicious code in WP_Theme for shell reversing
Below is the link, you can refer
In the dashboard page of worpress website, go to Appearance →Editor →404 Template
Download the php reverse shell code & extract it
Open the php-reverse shell.php in sublime text
Copy the code & paste it in 404 template
Change the ip address & port no. Set the ip addr as the kali ip
Start netcat & We will get a shell
#nc -lvnp 9999
In the home directory we got robot user. We will check the files of the robot user
The key 2 is permission denied.
So, we will get the information of the other file
In password.raw-md5 file contains the user name & md5 hash
Since, it is in hash format we will convert it into string format
Now we will login with robot user. There we will find the password for flag 2
3. What is flag 3?
As we know, the last flag will be of root flag. We will escalate the privileges
Here, the user is not running on SUDO, we will check with SUID & it also asks for tty
We will check for SUID set
#find / -perm /6000 -print 2>/dev/null | grep ‘/bin’
A lot of times administrators set the SUID bit to nmap so that it can be used to scan the network efficiently as all the Nmap scanning techniques do not work if you don’t run it with root privilege.
If Nmap has SUID bit set, it will run with root privilege and we can get access to the ‘root’ shell through its interactive mode
Here nmap is present, so we will check for shell in gtfobins. Before that we will spawn a shell using python.
#python -c ‘import pty;pty.spawn(“/bin/bash”)’
Here we will use the (b) command to execute the shell
We will get root access.
I hope this blog helps you to understand the basic concepts.
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OPCFW_CODE
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To download ENNODA RASI NALLA RASI MP3, click on the Download button
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ENNODA RASI NALLA RASI MP3
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OPCFW_CODE
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load a saved scene without bugs
Currently when you load a scene (.mrb) the mandiblePlaneObservers don't work and the input of the dynamicModelerNodes are lost. Maybe a button or an event can be used to correct these problems when a scene is loaded
Node references should be preserved when a scene is saved and reloaded but indeed in scripted modules you need to re-attach the node observations when the scene load is completed (you can add an observer to the scene's EndImport event and add the observers in the callback function).
Input of Dynamic modeler node should not be lost. If you find that in the scene file that the dynamic modeler nodes refer to the correct nodes but when you load the scene those references do not exist then upload that scene somewhere, post the link here, and I'll have a look.
Input of Dynamic modeler node should not be lost. If you find that in the scene file that the dynamic modeler nodes refer to the correct nodes but when you load the scene those references do not exist then upload that scene somewhere, post the link here, and I'll have a look.
I've checked and it look as I was wrong. DynamicModeler references do save well.
Node references should be preserved when a scene is saved and reloaded but indeed in scripted modules you need to re-attach the node observations when the scene load is completed (you can add an observer to the scene's EndImport event and add the observers in the callback function).
I can't get it to work.
class BoneReconstructionPlannerWidget(ScriptedLoadableModuleWidget, VTKObservationMixin):
...
def setup(self):
...
self.addObserver(slicer.mrmlScene, slicer.mrmlScene.EndImportEvent, self.onSceneEndImport)
...
def onSceneEndImport(self):
print('check if this line executes')# It doesn't
slicer.util.selectModule('BoneReconstructionPlanner')
shNode = slicer.vtkMRMLSubjectHierarchyNode.GetSubjectHierarchyNode(slicer.mrmlScene)
mandibularPlanesFolder = shNode.GetItemByName("Mandibular planes")
mandibularPlanesList = createListFromFolderID(mandibularPlanesFolder)
for i in range(len(mandibularPlanesList)):
planeNodeObserver = mandibularPlanesList[i].AddObserver(slicer.vtkMRMLMarkupsNode.PointModifiedEvent,self.logic.onPlaneModified)
What do you mean by cannot get it to work? What do you expect to happen? What happens instead?
Do not call slicer.util.selectModule! You must not change which module is active just because a scene is loaded. It should be fine if planes are not moving if the module is not active. It is enough if you ensure observers are up-to-date when you enter the module; or scene is imported while the module is already active.
Always remove old observers before adding new ones. Save the observation IDs as member variables so that later you can remove them; or use VTKObservationMixin's self.addObserver (which stores the observation IDs internally).
It is enough if you ensure observers are up-to-date when you enter the module; or scene is imported while the module is already active.
That was the problem: I was trying to import the scene without having opened the BoneReconstructionPlanner module once.
How do I ensure the observers are up-to-date when you enter the module?
Always remove old observers before adding new ones.
Why this is needed? Lots of unused observers make the interactions slower?
Save the observation IDs as member variables so that later you can remove them
When should I remove the observers I saved?
How do I ensure the observers are up-to-date when you enter the module?
You can add observers in enter() method.
Why this is needed? Lots of unused observers make the interactions slower?
Adding observers does not remove old observers. If you have multiple observers then callback functions will be called multiple times, slowing down the updates enormously. Also, observers prevent objects from being deleted, so you would have memory leaks.
When should I remove the observers I saved?
You always need to clean up after yourself for the reasons above (performance degradation and memory leaks). Removing is also necessary because you cannot ask the user to please switch to the module to make it work. We can either state that updates happen only while the module is active; or updates happen all the time (regardless of the module has been opened before or not).
It is a question do decide when to add/remove observers.
Option A: Add observer whenever a suitable parameter node is added to the scene; remove observer when that parameter node is removed from the scene. It is nice that you don't have to activate the module for the cutting planes to be in sync, but adding you need to implement all the observations and updates in the module logic, add observers to all suitable parameter nodes (or use a singleton parameter node, or have a reference to the "active" parameter node in the selection singleton node), and instantiate the module logic in the module class (in the startupCompleted signal callback).
Option B: Add observers when you enter the module, remove when you exit the module. Everything is simpler, but if the module is not active then synchronization of planes does not happen. I think this is not a huge issue. We can also lock planes when we exit the module to reduce the chance that users accidentally move them.
Okey. So we'll use Option B.
What do we do when the user deletes the "Mandibular planes" folder or some plane inside of it?
Do I need to use the slicer.mrmlScene.NodeAboutToBeRemovedEvent and the subjectHierarchyNode to check if the node belongs to the "Mandibular planes" folder and in that case remove the observer related to the planeNode?
You need to observe the scene for node removal anyway to update the display, remove corresponding fibula cutting plane, etc. In the callback where you process the node removal, you will remove the event observation as well.
Each time a mandiblePlane is deleted generateFibulaPlanes will be called to update the fibula planes quantity, position and orientation. But if you delete all the planes inside the "Mandibular planes" folder at the same time (or if you delete the whole folder maybe) this process will be called many times, which maybe kinda slow. Do we still do this?
Yes, we still do this.
If you delete many nodes in bulk then you can enable batch processing on the scene, which indicates that node updates can be ignored until batch processing ends.
Another option, which I think is better, because it makes the module more responsive in general is to not perform updates immediately when an input changes but start/reset a QTimer. If the inputs don't change for a while (e.g., 1 second) then the timer elapses and it calls your update function.
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GITHUB_ARCHIVE
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For more detailed information, screenshots, or if you have any support request, visit the development page of the extension here:
- Adds controls to each sound of the listening / speaking / translation challenges.
- Full controls are available by hovering over the buttons or using the keyboard shortcuts, and feature:
- a rate (speed) slider,
- a volume slider,
- a seek bar,
- a play/pause button,
- a stop button,
- a "pin" button (to define the current position as the new starting position).
- Strives to blend seamlessly in Duolingo's UI, and to be compatible with custom themes such as Darklingo++.
The selected control panel is identifiable by the keyboard icon that is added next to its buttons.
In order to use the keyboard shortcuts, the selected control panel must be focused by pressing [ Ctrl ].
Once focused, the keyboard icon becomes highlighted, and you can use:
- [ Ctrl ] to focus back the answer input,
- [ Tab ] to select (and focus) the next control panel,
- [ < ] / [ > ] to decrease / increase the playback rate (speed) (or [ Ctrl ] + [ ← ] / [ → ]),
- [ ↓ ] / [ ↑ ] to decrease / increase the playback volume,
- [ ← ] / [ → ] to move the position backward / forward,
- [ 0 ] .. [ 9 ] to set the position at 0 .. 90% of the duration,
- [ Home ] to set the position at the start,
- [ End ] to set the position at the end (think of it more or less as a stop button),
- [ Space ] / [ k ]to play / pause the sound (or [ Ctrl ] + [ ↑ ]),
- [ p ] to "pin" the current position (the sound will now start from there each time it is played) (or [ Ctrl ] + [ ↓ ]).
Shortcuts behind parentheses are provided as alternatives for when the main ones are not available.
This can happen for example when a "keyboard-aware" word bank is available for the current challenge.
- The extension is deeply tied to the inner workings of Duolingo, meaning that significant changes on their side could (temporarily) break it. If that happens, you can either:
- wait for me to fix it (you can open an issue on the support page if there is none about it yet),
- if you're a developer, try to fix it yourself, then open a related PR on the development page.
- Due to hard limitations with the underlying technology (sounds are not accessible via Ajax requests, preventing us from using the Web Audio API), the volume can not be raised over 100%.
- Гэта пашырэнне можа мець доступ да вашых дадзеных на некаторых вэб-сайтах.
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OPCFW_CODE
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/**
* Useful functions for dealing with monad-like things
*/
import { Optional, optional } from "./OptionalMonad";
import { Functor } from "./Monad";
export type PromiseExecutor<T> = (
resolve: (value?: T | PromiseLike<T>) => void,
reject: (reason?: any) => void
) => void;
export function isPromiseExecutor<T>(maybe: any): maybe is PromiseExecutor<T> {
return typeof maybe === "function";
}
export type ErrorHandler<T> = (reason: unknown) => T;
/**
* Flatten nested Functors
* Takes advantage of Optional, which in turn takes advantage of Promises
*
* @returns an Optional which is also a Functor and a Monad
* This means that if any of the functors map to 'undefined' then the result
* will be an 'empty' Optional
*/
export function flatten<A>(nested: Functor<Functor<A>>): Optional<A> {
// In reality already flattened just need to convert type
if (nested instanceof Promise) {
return optional(nested);
}
// Use Promise to condense the nest
return optional((resolve) => {
nested.map((fa) => {
fa.map((a) => {
resolve(a);
});
});
});
}
/**
* Unrolled 'loop' of Functor composers
*
* At some point there might be a more generalizable way of doing this with
* typescript. Perhaps there is already and I'm just unaware :)
*
* I think the rule of 3-5 applies here so likely this unrolled 'loop' should
* not have to be expanded much if ever.
*/
export type Composer2<A, B, R> = (a: A, b: B) => R;
export type Composer3<A, B, C, R> = (a: A, b: B, c: C) => R;
export type Composer4<A, B, C, D, R> = (a: A, b: B, c: C, d: D) => R;
export type Resolver<T> = (value: T) => T;
export function compose2<A, B, R>(
composer: Composer2<A, B, R>,
...functors: [Functor<A>, Functor<B>]
): Optional<R> {
const nestedResult = functors[0].map((a) =>
functors[1].map((b) => composer(a, b))
);
return flatten(nestedResult);
}
export function compose3<A, B, C, R>(
composer: Composer3<A, B, C, R>,
...functors: [Functor<A>, Functor<B>, Functor<C>]
): Optional<R> {
const nestedResult = functors[0].map((a) =>
functors[1].map((b) => functors[2].map((c) => composer(a, b, c)))
);
return flatten(flatten(nestedResult));
}
export function compose4<A, B, C, D, R>(
composer: Composer4<A, B, C, D, R>,
...functors: [Functor<A>, Functor<B>, Functor<C>, Functor<D>]
): Optional<R> {
const nestedResult = functors[0].map((a) =>
functors[1].map((b) =>
functors[2].map((c) => functors[3].map((d) => composer(a, b, c, d)))
)
);
return flatten(flatten(flatten(nestedResult)));
}
|
STACK_EDU
|
To reduce disk space usage and log noise, NGINX is configured with a very conservative error logging configuration of warn
error_log /var/log/nginx/error.log warn
While the default setting has benefits, there is the tradeoff that troubleshooting various problems, such as a 500 error, is not feasible with this default setting because 500 errors and other potential issues are not included in the log.
You may use the following techniques to increase your ability to diagnose problems that you may encounter.
Please note, there is no need to edit the default error_log directive
The default error_log directive is configured in the main ( AKA top level: /etc/nginx/nginx.conf ) configuration and is applied globally.
Changes made to the default error_log directive:
- Can unnecessarily increase the noise in the error log, which makes it more challenging to find the problem
- Are more likely to cause the server to run out of disk space
- Are more likely to hinder server performance due to increased disk write operations
- Will be overwritten by cPanel whenever the configuration is rebuilt
- Are better implemented in other ways
The error_log directive is designed in a way that allows the administrator to override the default very easily, as explained in the below sections.
The possible logging levels are: debug, info, notice, warn(default), error, crit, alert, and emerg.
Generally, when trying to troubleshoot a problem, the best method is to use the debug log level and then only decrease the log level if you find that the debug level is too verbose.
Enabling Debug Logs For An Individual Domain / Site
1. log in to the server via SSH or Terminal as the root user
2. Create a configuration file for the domain if one does not already exist. Please be sure to replace the cPanel username and domain name in the following command to match yours, but in lowercase letters:
3. Add the following configuration to that file, and be sure to replace the domain name with your own:
error_log /var/log/nginx/domains/EXAMPLEDOMAIN.tld-custom_debug.log debug;
4. Restart NGINX:
Also note, that you don't need to rebuild the configuration because includes in the specified directories are built into the main configuration through wildcard matching.
Enabling Debug Logs For All Domains That A User Owns
Perform the same exact steps as are outlined in above, except put the configuration at the following location on step 2. Do not include the "location" clause for this configuration.
And set the log file location to the following in step 3, replacing the username as required:
error_log /var/log/nginx/domains/USERNAMEHERE-custom_debug.log debug;
Enabling Debug Logging Server Wide
Enabling debug logging server wide can cause a problem because it can use an excessive amount of disk space very quickly and may potentially cause the server to run out of disk space entirely. It also will increase the I/O resources used and could hinder performance. Only keep debug enabled for a very short time and monitor the server closely.
Perform the same steps as above but put the configuration in the following location in step 2:
And update the log location to the following in step 3. Do not include the "location" clause for this configuration.
error_log /var/log/nginx/error.log debug;
|
OPCFW_CODE
|
detect . in a/.//
Wed Sep 30 15:35:00 GMT 2009
On Wed, Sep 30, 2009 at 11:24:38AM -0400, Christopher Faylor wrote:
>On Wed, Sep 30, 2009 at 06:07:29AM -0600, Eric Blake wrote:
>>-----BEGIN PGP SIGNED MESSAGE-----
>>My testing on rename found another corner case: we rejected
>>rename("dir","a/./") but accepted rename("dir","a/.//"). OK to commit?
>>For reference, the test I am writing for hammering rename() and renameat()
>>corner cases is currently visible here; it will be part of the next
>>coreutils release, among other places. It currently stands at 400+ lines,
>>and exposes bugs in NetBSD, Solaris 10, mingw, and cygwin 1.5, but passes
>>on cygwin 1.7 (after this patch) and on Linux:
>>2009-09-30 Eric Blake <email@example.com>
>> * path.cc (has_dot_last_component): Detect "a/.//".
>No, I don't think so. I don't think this function is right. It
>shouldn't be doing a strrchr(dir, '//). And the formatting is off
>Is this function supposed to detect just "." or "*/."?
Assuming the answer is yes, then how about the below? I added a bunch of
comments but the function is still fairly small.
I've attached the function as-is since I basically rewrote it.
has_dot_last_component (const char *dir, bool test_dot_dot)
/* SUSv3: . and .. are not allowed as last components in various system
calls. Don't test for backslash path separator since that's a Win32
path following Win32 rules. */
const char *last_comp = strrchr (dir, '\0');
if (last_comp == dir)
return false; /* Empty string. Probably shouldn't happen here? */
/* Detect run of trailing slashes */
while (last_comp > dir && *--last_comp == '/')
/* Detect just a run of slashes or a path that does not end with a slash. */
if (*last_comp != '.')
/* We know we have a trailing dot here. Check that it really is a standalone "."
path component by checking that it is at the beginning of the string or is
preceded by a "/" */
if (last_comp == dir || *--last_comp == '/')
/* If we're not checking for '..' we're done. Ditto if we're now pointing to
a non-dot. */
if (!test_dot_dot || *last_comp != '.')
return false; /* either not testing for .. or this was not '..' */
/* Repeat previous test for standalone or path component. */
return last_comp == dir || last_comp[-1] == '/';
More information about the Cygwin-patches
|
OPCFW_CODE
|
In my opinion, WordFence is one of the most overrated WordPress security plugins out there and there are several reasons, namely….
- It fills the database with tables and options that will remain there after deactivation if you do not remedy it.
- High consumption of WordPress and server resources.
- No options to manage and/or disable XML-RPC.
- Uninstalling it is not just uninstalling it from the plugins screen and that’s it, it requires additional work.
And to the latter we go.
Table of Contents
The problem with Wordfence uninstallation
No matter which version of WordFence you have, free or premium, always before deactivating WordFence you must go to the WordFence general options, which are in the administration of your WordPress, in Wordfence → All options, and check the box called “Delete Wordfence tables and data on deactivation“.
This ensures that the following is deleted when you deactivate Wordfence in the plugins screen:
- The files in the plugin folder.
- Records in the
- Records in the
- Wordfence firewall configuration file in the root of the installation (
.user.inifile with Wordfence rules in the root of the installation.
.htaccessfiles in plugin, theme and
- Wordfence logs folder (
- Wordfence tables and options in the database.
As you can see it is not a joke the amount of residue that Wordfence will leave if you don’t uninstall it properly. Of course, if you delete the plugin directly it is just as bad, so remember:
- Check the delete Wordfence data and tables checkbox in your general options.
- Deactivate Wordfence
- Delete Wordfence
- Check that everything has been deleted
Normally the first 3 points would be enough but my advice is to check that no trace is left, but what if after doing all this my website crashes, shows a 500 error?
Web down with error 500 after disabling Wordfence
It doesn’t matter if you followed the recommended steps before, although it is more likely to happen if you don’t follow them, it may happen that when you deactivate Wordfence your website breaks, showing a 500 error.
Why does this happen?
Well, basically because not all the Wordfence junk has been deleted, and there are still some references to files that no longer exist.
The culprit, 99.99% of the time, is the
.user.ini file in the root folder of your installation, which will still include a reference to the Wordfence firewall configuration file and, not finding it, breaks your website completely, with a 500 error.
How do I fix error 500 when disabling Wordfence?
You must check at least 2 files in the root folder of your WordPress installation:
.htaccess file you should look for lines like these, delete them and save the changes:
# Wordfence WAF <Files ".user.ini"> <IfModule mod_authz_core.c> Require all denied </IfModule> <IfModule !mod_authz_core.c> Order deny,allow Deny from all </IfModule> </Files> # END Wordfence WAFCode language: HTML, XML (xml)
.user.ini file you will probably find these or similar lines:
Delete them anyway and save the changes.
An alternative solution, or if you prefer a quick check, would be to rename these files, for example by adding at the end of the file something like
.wf or whatever you want (e.g.
.user.ini.wf) to disable them completely, then saving the permalinks settings. WordPress will generate the correct
.htaccess file again.
After these changes you should now be able to view and access your site normally, without the 500 error.
However, I encourage you to review the list above to check that the rest of the Wordfence residues have been deleted, which as we have seen are many and varied, both in files and in the database.
That’s all for now. I hope I have helped you.
If you still have doubts or you have not solved the problem tell us in the comments anyway, we will try to help you as much as possible.
|
OPCFW_CODE
|
nvme not working
nvme isn't working..
when I run the script it shows "nvme0n1" and not "nvme0n1p3"?
can I fix this myself?
Nvme0n1 is a disk while nvme0n1p3 is a partition of that disk. Please provide tiny bit more detail about your issue.
Nvme0n1 is a disk while nvme0n1p3 is a partition of that disk. Please provide tiny bit more detail about your issue.
well I guess that's unrelated
it says "boot device not found" on startup
can it not find the disk or am I just stupid?
i think it is genfstab issue may be. have you got the logs for installation??
What does your /etc/fstab look like?
i think it is genfstab issue may be. have you got the logs for installation??
no I dont
What does your /etc/fstab look like?
lemme see
i think it is genfstab issue may be. have you got the logs for installation??
no I dont
Should have copied .log files to your home directory after installation finished.
What does your /etc/fstab look like?
# /dev/nuneOn1p3
UUTD=85142c3e-ef65-420c-bc5d-65486640895c / ext4 rw,relatine 0 1
# /dev/nvme0n1p1
UUID=750C-DCEE /boot rw,relatine, fmask=6022, dmask=0022,codepage=437,iocharset-ascii,short name=nixed, utf8,errors=remount-ro 0 2
# /dev/nuneOn1p2
UUTD=991b6907-6495-4Zba-8150-36c24694a74c none swap defaults 0 0
i think it is genfstab issue may be. have you got the logs for installation??
no I dont
Should have copied .log files to your home directory after installation finished.
theres no logs at all
No logs and your fstab is UUID based. Those are both things from newer commits that have been changed. When did you do this installation?
I would try installation again with latest from test or main and see if you get different behavior.
Get Outlook for iOShttps://aka.ms/o0ukef
From: AllMesi @.>
Sent: Saturday, February 26, 2022 5:16:00 PM
To: ChrisTitusTech/ArchTitus @.>
Cc: Austin Horstman @.>; Comment @.>
Subject: Re: [ChrisTitusTech/ArchTitus] nvme not working (Issue #241)
No logs and your fstab is UUID based. Those are both things from newer commits that have been changed. When did you do this installation?
yesterday
—
Reply to this email directly, view it on GitHubhttps://github.com/ChrisTitusTech/ArchTitus/issues/241#issuecomment-1052770034, or unsubscribehttps://github.com/notifications/unsubscribe-auth/AANSH3SRQTN463WGKKIJZO3U5FNLBANCNFSM5PM7Z3HQ.
You are receiving this because you commented.Message ID: @.***>
I would try installation again with latest from test or main and see if you get different behavior.
…
________________________________ From: AllMesi @.> Sent: Saturday, February 26, 2022 5:16:00 PM To: ChrisTitusTech/ArchTitus @.> Cc: Austin Horstman @.>; Comment @.> Subject: Re: [ChrisTitusTech/ArchTitus] nvme not working (Issue #241) No logs and your fstab is UUID based. Those are both things from newer commits that have been changed. When did you do this installation? yesterday — Reply to this email directly, view it on GitHub<#241 (comment)>, or unsubscribehttps://github.com/notifications/unsubscribe-auth/AANSH3SRQTN463WGKKIJZO3U5FNLBANCNFSM5PM7Z3HQ. You are receiving this because you commented.Message ID: @.***>
Ok
I would try installation again with latest from test or main and see if you get different behavior.
it never worked
Does your fstab look the same with UUID instead of labels and no log files in users home directory?
fstab has labels now
and there are logs as well
installed using archinstall
closed for now
|
GITHUB_ARCHIVE
|
Override numpy.random to use cudamat
I have a programm that uses np.random many times. Now I wan't the user to pass an argument gpu=True/False. How can I override np.random to return cm.CUDAMatrix(np.random.uniform(low=low, high=high, size=size)) without ending in a recursion?
Or is there a better way to use cudamat with small code changes?
Thanks for your help.
If you need more code please comment.
class FeedForwardNetwork():
def __init__(self, input_dim, hidden_dim, output_dim, dropout=False, dropout_prop=0.5, gpu=True):
np.random.seed(1)
self.input_layer = np.array([])
self.hidden_layer = np.array([])
self.output_layer = np.array([])
self.input_dim = input_dim
self.hidden_dim = hidden_dim
self.output_dim = output_dim
self.dropout = dropout
self.dropout_prop = dropout_prop
r_input_hidden = math.sqrt(6 / (input_dim + hidden_dim))
r_hidden_output = math.sqrt(6 / (hidden_dim + output_dim))
self.weights_input_hidden = np.random.uniform(low=-0.01, high=0.01, size=(input_dim, hidden_dim))
self.weights_hidden_output = np.random.uniform(low=-0.01, high=0.01, size=(hidden_dim, output_dim))
Please post more of your code, specifically the np.random method or class. You can simply overload the method but I will need to see what the arguments are.
The two last lines are the important ones.
class FeedForwardNetwork():
def __init__(self, input_dim, hidden_dim, output_dim, dropout=False, dropout_prop=0.5, gpu=True):
np.random.seed(1)
self.input_layer = np.array([])
self.hidden_layer = np.array([])
self.output_layer = np.array([])
self.input_dim = input_dim
self.hidden_dim = hidden_dim
self.output_dim = output_dim
self.dropout = dropout
self.dropout_prop = dropout_prop
r_input_hidden = math.sqrt(6 / (input_dim + hidden_dim))
r_hidden_output = math.sqrt(6 / (hidden_dim + output_dim))
self.weights_input_hidden = np.random.uniform(low=-0.01, high=0.01, size=(input_dim, hidden_dim))
self.weights_hidden_output = np.random.uniform(low=-0.01, high=0.01, size=(hidden_dim, output_dim))
def np_random(self, gpu):
'''gpu:bool'''
if gpu:
return np.random.uniform(low=-0.01, high=0.01, size=(self.input_dim, self.hidden_dim))
else:
return np.random.uniform(low=-0.01, high=0.01, size=(self.hidden_dim, self.output_dim))
Then you can call it from your instance:
instance = FeedForwardNetwork(**kwargs)
instance.np_random(True/False)
Thanks for this. Is there no way to really override np.random so I do not have to change all the code to np_random?
If you import numpy as np then no I don't think you can because anything starting will look in the numpy library. That being said if you change the numpy library you can certainly override that method.
Okay that was all I wanted! Thanks for your help.
|
STACK_EXCHANGE
|
Presentation on theme: "NOTE: To change the image on this slide, select the picture and delete it. Then click the Pictures icon in the placeholder to insert your own image. WEB."— Presentation transcript:
NOTE: To change the image on this slide, select the picture and delete it. Then click the Pictures icon in the placeholder to insert your own image. WEB PROGRAMMING WITH MICROSOFT VISUAL STUDIO 2013 WEEK1 Introduction to ASP.NET Explore ASP.NET Web applications in Microsoft Visual Studio 2013.
.NET framework The.NET Framework (pronounced “dot net”) is a software framework that runs primarily on Microsoft Windows. It includes a large library and supports several programming languages which allow language interoperability (each language can use code written in other languages). The.NET library is available to all the programming languages that.NET supports. Programs written for the.NET Framework execute in a software environment, known as the Common Language Runtime (CLR), an application virtual machine that provides important services such as security, memory management, and exception handling. The class library and the CLR together constitute the.NET Framework.
Microsoft Visual Studio Microsoft Visual Studio is an integrated development environment (IDE) from Microsoft. It can be used to develop console and graphical user interface applications along with Windows Forms applications, web sites, web applications, and web services in both native code together with managed code for all platforms supported by Microsoft Windows, Windows Phone, Windows CE,.NET Framework,.NET Compact Framework and Microsoft Silverlight.
Visual Studio IDE Overview The Visual Studio IDE (interactive development environment) can increase your productivity when you write, debug, and test code.
Visual Studio IDE Overview The primary windows in Visual Studio include the Solution Explorer, the Server Explorer (Database Explorer in Express), the Properties Window, the Toolbox, the Toolbar, and the Document Window.
Visual Studio IDE Overview After you open Visual Studio, you can identify the tool windows, the menus and toolbars, and the main window space. Tool windows are docked on the left and right sides of the application window, with Quick Launch, the menu bar, and the standard toolbar at the top. In the center of the application window is the Start Page. When you load a solution or project, editors and designers appear in the space where the Start Page is. When you develop an application, you’ll spend most of your time in this central area.
Visual Studio IDE Overview You can make additional customizations to Visual Studio, such as changing the font face and size of the text in the editor or the color theme of the IDE, by using the Options dialog box. Depending on the settings combination that you’ve applied, some items in that dialog box might not appear automatically. You can make sure that all possible options appear by choosing the Show all settings check box.
To change the color theme of the IDE Open the Options dialog box by choosing the Tools menu at the top and then the Options … item.
Creating the Project 1. Open Visual Studio. 2. Select New Project from the File menu in Visual Studio. 3. Select the Templates -> Visual C# -> Web templates group on the left. 4. Choose the ASP.NET Web Application template in the center column.
Creating the Project 5. Name your project choose the OK but
Creating the Project 6. Next, select the Web Forms template and chooks the Create Project button.
Creating the Project The project will take a little time to create. When it’s ready, open the Default.aspx page.
Different Views in Visual Studio IDE Design View Design view displays ASP.NET Web pages, master pages, content pages, HTML pages, and user controls using a near-WYSIWYG view. Source View To switch between Design view and Source view by selecting an option at the bottom of the center window. Source view displays the HTML markup for your Web page, which you can edit.
|
OPCFW_CODE
|
To be held in conjunction with the 14th CISIS 2020 International Conference
The value of most organizations today greatly exceeds their net tangible assets. 2020 IKIDW aims to address contemporary issues in managing knowledge, intellectual capital and other intangible assets in digital world with the help of IT application. The digital era contributes to the amount of knowledge available in various qualities. This is a challenge for business people in strategic decision making. IT Application is expected to reduce knowledge ambiguity so that it will improve the quality of organizational decisions. Beginning with a view that knowledge becomes strategic assets, the workshop will discuss the fundamentals of managing knowledge and intellectual capital, understanding some of the measurement issues, processes and cycles involved in their management and the specific issues in managing knowledge, especially with the availability of big data and with the help of IT application.
Topic of Interest : Topics of interest (but not limited to)
- Knowledge ethics in digital era
- innovation failure in digital era
- Social network and knowledge sharing
- Digital business and knowledge acquisition
- E-learning and Creative knowledge
- Network integrated and knowledge collaboration
- knowledge infrastructure in digital world
- Human behaviour and organizational knowledge learning
- Digital human capital in internet era
Organizing Committee :
Olivia Fachrunnisa, Sultan Agung Islamic University (Indonesia)
Ardian Adhiatma, Sultan Agung Islamic University (Indonesia)
Program Committee :
Ahmed A. Al-Absi, KyungDong University, Korea)
Touhid Bhuiyan, Dafodil International University (Bangladesh)
Mazideh Puteh, Universiti Tehnologi Mara, Terengganu (Malaysia)
Submission Deadline: February 25, 2020
Authors Notification: April 1, 2020
Author Registration: April 15, 2020
Final Manuscript: April 15, 2020
Conference Dates: July 1-3, 2020
The workshop will be held at the lodz university of technology, Lodz, Poland,
July, 1st – 3rd 2020
Paper submission link
Manuscript required :
- Original full paper of at most 6 (six) pages including figures and references in PDF are solicited.
- Papers must be prepared using the Lecture Notes Style of Springer Proceedings.
- Submission of a paper should be regarded as a commitment that, if the paper is accepted, at least one of the authors will register and present at the conference.
Paper Format Templates can be downloaded here
On-Line Submission here: select Track Workshop-2020 IKIDW
Author Kit (final version)
- PDF CAMERA READY
and submit them AS A UNIQUE ZIP FILE (edasID_name_surname_CISIS_2020.zip) to EDAS
before the deadline of Author Registration: APRIL 15, 2020.
TEMPLATES CAN BE FOUND HERE:
Leave a reply
|
OPCFW_CODE
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|The latest MYTEK whitepaper titled “How Bad IT Decisions Really Affect Your Business”|
|Every day, small businesses make bad IT decisions that either make it harder to reach their business goals or cripple the business entirely in such a way that it represents a death knell.The latest whitepaper from MYTEK explores why these small businessesare prone to making bad IT decisions, how they affect the business, and what IT solutions for small business can be implemented by the CIO to avoid these outcomes.
Complete the form below to access the latest whitepaper titled “How Bad IT Decisions Really Affect Your Business”
|More about this whitepaper…|
|Without a complete view that provides multiple perspectives on the business, the CIO is unable to make decisions based on a more holistic view of the organization, which can result in bad IT decisions for the business. The whitepaper looks at some of these potential areas for bad IT decisions including:
The manifestation of bad IT decisions around software that is not best-fit for their particular needs or poorly implemented is explored.In terms of the network and overall IT infrastructure, readers see how legacy hardware can cripple the business. More importantly how it is often overlooked in terms of the potential problems that it poses.
The first section of the whitepaper mirrors the challenges that most SMB CIOs face in integrating legacy and new IT architecture. The section expounds on how these projects within an overall IT strategy can be derailed due to forces that are unseen and/or out of the control of the CIO and the internal IT team. Many of the most common IT solutions for small business are explored through this lens to show how bad IT decisions surrounding their choice and implementation can manifest in failed business processes and stalled business growth including:
The second half of the whitepaper looks at a leading IT solution that can be tailored to fit a wide variety of needs when an SMB is caught in a cycle of bad IT decisions. Although many SMBs have discounted the efficacy and feasibility of partnering with an IT management consulting firm as a solution to these challenges, the whitepaper shows how they are uniquely positioned to address this from a partnership position with the CIO and IT team.
As IT becomes an ever increasingly important part of every company, CIOs need to reshape the way that their IT department makes strategic decisions. By providing the support that SMB CIOs and their IT staffs need to make the changes contained within the whitepaper, CIOs will find that they can make more (and better) strategic decisions throughout the year. This will allow their IT department to do what it was originally designed to do – help the company do more and do it more quickly.
Call a MYTEK Consultant today at 623-312-2440 to learn how and why the outsourced IT management and services firm is the key to successful IT strategy design and fulfillment.
|
OPCFW_CODE
|
Passing an object as a buffer in irecv - TypeError: expected a writeable buffer object
I'm using MPI for a project. I need to transmit a package from a node to another in non-blocking mode. I'm organizing this package with a Class that contains relevant information for my communication logic.
I'm making some tests with the functions irecv() to get the request of my communication and the buffer and also test() to verify if some message arrived.
MPI lacks of documentation for Python, so I'm inspecting the source code for more information, where is the functions i'm using.
The source code declares irecv as following:
def irecv(self, buf=None, int source=ANY_SOURCE, int tag=ANY_TAG):
"""Nonblocking receive"""
cdef MPI_Comm comm = self.ob_mpi
cdef Request request = <Request>Request.__new__(Request)
request.ob_buf = PyMPI_irecv(buf, source, tag, comm, &request.ob_mpi)
return request
I understood that if I want the data to be put in a buffer I need to set the optional parameter "buf" with where I want my received message to be stored.
I tried the following test to learn how It works:
from mpi4py import MPI
import time
comm = MPI.COMM_WORLD
rank = comm.Get_rank()
class Package(object):
msg = [[0,1,0,1,0,1],
[0,1,0,1,0,1],
[0,1,0,1,0,1],
[0,1,0,1,0,1],
[0,1,0,1,0,1]]
gotMessage = False
destination = -1
if rank == 0:
data = Package()
comm.isend(data, dest=1, tag=11)
elif rank == 1:
data = Package()
req = comm.irecv(buf=data, source=0, tag=11)
while not req.test():
sleep(0.1)
print(rank, data.msg)
I was expecting the following behaviour:
Node with rank 0 send the packet as an object to node with rank 1
Node with rank 1 starts receiving non-blockingly and, when it finishes the receiving, what happens when test() returns True, I can print the data.msg.
The problem is, when I run the following error occurs at buf:
TypeError: expected a writeable buffer object
How can I correctly use irecv() to transmit/receive objects?
In mpi4py, there are two kinds of interfaces on top of MPI. A low-level interface that communicates buffers back and forth (indicated by a capital letter, i.e. Isend), and a high-level interface that communicates python objects (i.e. isend).
The high-level interface serializes objects via pickle. For non-blocking operations this needs a buffer that is user-supplied and needs to be large enough. The test function on the other hand returns a found, object tuple. So using the high-level interface, your code receiver looks like:
buf = bytearray(b" " * 256)
req = comm.irecv(buf=buf, source=0, tag=11)
while True:
found, data = req.test()
if found:
break
time.sleep(0.1)
print(1, data.msg)
Note, your sender code is missing the completion of the message. But it should not matter whether you send or isend the data.
In any case, you have to somehow determine a sufficient buffer size for the receive buffer, which is probably impossible to do really cleanly. If the buffer is too small, you will receive an MPI.Exception.
You can also use the low-level interface. For instance, you can send around numpy arrays easily:
if rank == 0:
data = np.array([1, 2, 3], dtype=float)
comm.Send(data, dest=1, tag=11)
elif rank == 1:
data = np.zeros(3, dtype=float)
req = comm.Irecv(buf=data, source=0, tag=11)
while True:
found = req.Test()
if found:
break
time.sleep(0.1)
print(1, data)
The shape and dtype must match to make sense of it.
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Wistar Scientists Uses Artificial Intelligence to Identify Viruses Related to Cancer
Some cancers are linked to viral infections. Studying viruses found in tumor cells can reveal important information in the development of more effective cancer treatments. Wistar researchers developed a tool to study the expression of cancer-related viruses through artificial intelligence. In a recent paper published in Nature Communications by Noam Auslander, Ph.D., assistant professor, Molecular & Cellular Oncogenesis Program, Ellen and Ronald Caplan Cancer Center, and her lab, created the technology called viRNAtrap as an innovative method that identifies viruses from human RNA sequences and rapidly characterizes viruses expressed in tumors.
Wistar discussed viRNAtrap and its creation with Dr. Auslander to find out more about how this novel technology impacts research on cancer and other viral diseases.
Q: What inspired this research to develop a new platform analyzing viral expression linked to cancer? Is this a one-time study or part of a larger project?
A: I have always wanted to investigate viruses that cause cancer or correlate with cancer outcomes. As a trainee I worked in computational labs that studied cancer or viruses (but not both) and used different tools for these studies. In my lab I incorporate those tools, allowing the development of this framework. This is a major research direction in my lab, and we have follow-up projects that are looking into related questions.
Q: What is viRNAtrap? How did you and your team come up with this name?
A: My postdoc Dr. Abdurrahman Elbasir and I came up with the name. It combines vi- (for virus), RNA (for RNA sequences), and trap (because we “trap” viral RNA sequences that are difficult to identify).
Q: What can viRNAtrap do?
A: It’s a software to identify viruses from short RNA sequencing reads – taking small fragments of the genome then assembling longer sequences of viruses that are expressed in a tissue.
Q: What were your methods in creating this framework? Were there any challenges that arose during the process?
A: As a postdoc I worked on an AI software to identify viruses, but this platform was based on longer sequences coming from a different technology. The read length was and is a major bottleneck for viRNAtrap. Dr. Elbasir managed to train a deep learning model — that’s a model that is built using neural networks that can distinguish viral reads from human reads fairly well using reads as short as 48bp. This model and the proof of concept that it could be built were critical for this research. Based on this model, we built the viRNAtrap framework that identifies viral reads and assembles longer sequences (contigs) from which known and new viruses can be characterized.
Q: How did you verify viRNAtrap works?
A: The model was validated and tested with an independent test dataset. The whole framework was verified using cases with known cancer viruses in the TCGA. We also had an experimental validation for one of the new viruses that we found in ovarian cancer, through a collaboration with Dr. Rugang Zhang’s lab, who verified that this virus is expressed in cell lines.
Q: Was there anything surprising that viRNAtrap detected?
A: There were a couple of very surprising viruses viRNAtrap detected, including some plant and insect viruses that were found in tumor tissues. The most notable of which was an insect virus that we found in 25% of endometrial cancer samples. If this association is real and not due to some unidentified contamination of the TCGA samples, this could be a very important discovery.
Q: How can this tool be used in biomedical studies to help prevent/combat cancer and other diseases?
A: We all know that viruses are a major health concern, and that they contribute to many diseases. However, viruses are really difficult to study with current sequencing technologies as they evolve rapidly and accumulate many mutations. Using this tool, we can identify new viruses in disease tissues even if they are divergent and mutated. We can therefore find viruses that drive or modulate diseases, which can lead to new diagnosis, vaccination, and treatment strategies.
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Pretty big noob here(installed Manjaro couple of days ago as main) so bear with me
Im using Logitech Z5500 5.1 speakers connected to onboard ALC1150. The crossover in the set was done through the control unit the speakers had, but since it burned out i had to rewire them so they would work without the head unit. And ofcourse since then the built in crossover was gone, and subwoofer wouldnt work without some additional steps.
Namely in Windows i could just enable bass redirection in the realtek driver and it would start working, same thing with a Xonar D2 sound card(here the setting was called Crossover frequency if i recall correctly).
With 2.0 and 4.0 output sub can be actually heard, but any of the .1 output settings sub goes away.
Tried few things like changing few values in /etc/pulse/daemon.conf
remixing-produce-lfe = yes
remixing-consume-lfe = yes
lfe-crossover-freq = 100
But still no cake.
Using 5.10.56-1 kernel and Manjaro 21.0.7 KDE Plasma with all latest updates
In that same file, is enable-remixing = yes
I have it disabled because I don’t want to have stereo content upmixed to surround. But for testing purposes I enabled it, together with both LFE settings you already enabled and the crossover freq is applied correctly.
Any change in that file requires restarting pulseaudio. So use
in a terminal (if you are on KDE like me you can press F12 to summon one) or just reboot.
@MMMMMaett , dont want to jinx them, but after the control unit broke after only 1-2 years and i rewired them, they havent been turned off at all for probably 10 years, and still kicking :).
@nikgnomic Seems like pulseaudio isnt registering the changes for some reason.
I get this output from pulseaudio --dump-conf :
remixing-produce-lfe = no
remixing-consume-lfe = no
lfe-crossover-freq = 0
default-sample-channels = 2
default-channel-map = front-left,front-right
Even though remixing is set to “yes” , channels to 6, and i also added rest of speakers to channel map.
Also added this line to default.pa load-module module-combine channels=6 channel_map=front-left,front-right,rear-left,rear-right,front-center,lfe , and copied both config files to user/.config/pulse/ as i saw recommended in some other thread and did couple of restarts just in case.
Im editing the configs with kate, maybe i need to use some special tool?
Or maybe me having installed pulseaudio-modules-bt (needed aptx HD and LDAC codecs) is somehow messing with pulseaudio?
Strangest thing is that pulseaudio --dump-conf show it reads from configuration file: /home/user/.config/pulse//daemon.conf , and everything is set there correctly, but yet values differ in the dump.
Ok, i did solve my issue(after many hours of reading) but in sort of a brutish way, replaced pulseaudio with pipewire .
Which in the end turned out to be a good decision, as now besides my sub working and getting the same fancy BT codecs support, i can also see the battery level of my BT receivers, and the mSBC codec is also a welcomed addition.
Thank you guys for your input on the issue, much appreciated.
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If quick turnarounds of large projects are important, a firm probably is best. Plus, the CTO will help you learn how to hire a programmer for a startup. Let’s look at how to find software developer for startup offline. This is the main part of how to find a software developer for startup. So, we have distilled down to the second last leg of our discussion on how to hire programmers for startup.
Do programmers get paid well?
Computer programmers get paid well, with an average salary of $63,903 per year in 2020. Beginner programmers earn about $50k and experienced coders earn around $85k.
Run through the project from front to end, address questions or potential problems, ask for their input. Paid tests — When you have whittled down the list to just a few candidates, it’s a good idea to ask them to complete a paid test. Give them a small task to accomplish and see how it goes. Pay attention to both the work and their communication throughout. Keep in mind that it can be more challenging to judge the quality of a web developer there. 99designs — Originally a crowdsourcing service for graphic designers, it now also lets you find web designers and developers.
Do You Sign Nda With Your Developers?
You save here by not having to buy expensive office equipment or pay for extra office space for extended personnel. Full-time remote hires receive the same benefits as in-house employees, but it’s still considerably less expensive than having a person in the office. You are not alone in wondering how to find a programmer for your startup. Fortunately, there are several good options available to you. Every developer who work with us are our full time employees.
For example, US-based UI/UX designers earn $85,300/year. Developers, who are the core of the whole team earn $80,000/year on average.
Hire a coder online who can write first time right code to ensure timely delivery. Rent a coder and build scalable, secure and interactive web applications.
So, while finding programmers to interview should be fairly easy with Upwork, interviewing dozens of candidates will be an involved process. Just post a job listing and wait for freelancers to make bids.
Look To Hire The Development Team?
Once you hire someone long term, then you can share your info. I am hiring a web developer to build a Beta version of my website. If this assignment is completed well, there will be the potential for additional, long term work.
An expert programmer differs from a coder as they actively think about solutions to create a successful program before beginning the process of coding. An expert in programming is able to optimise the benefits of a computer to meet their needs. If this is the person you need in your life, worry not longer. Freelancer.com can help you find an expert programmer who can help you create the digital programs you need. Abhimanyu is a machine learning expert with 15 years of experience creating predictive solutions for business and scientific applications.
We are writing this guide to help even the non-tech startup founders get an idea of what they can expect from a candidate. If possible, draft a UX and UI mockup of the application.
I hired him immediately and he wasted no time in getting to my project, even going the extra mile by adding some great design elements that enhanced our overall look. Previously the lead architect for Gucci’s eCommerce business, Filippo specializes in developing beautiful applications with Ruby on Rails, and has 9+ years of engineering experience. He strongly believes in TDD as the only way to build rock-solid code that makes his clients happy.
Before flagging a candidate for job-hopping, you may want to find out why they switch their jobs. Also, note that different environments have different employee turnover rates. It’s a good way to find out if you’re barking up the right tree when it comes to specifics like who you want to hire, which language to use, and which tech to use. Regardless, having such a person can help you make business decisions. For example, you’ll need to figure out how you’re going to deliver your product.
Where can I find programmers?
7 Websites to Find a Programmer for Your StartupDaxx.
If you need a developer in a pinch, try matching services like Toptal. Gigster is a recruiting platform similar to companies like X-Team. Gigster connects you a with qualified team of developers for a variety of tech where to hire programmers projects. PeoplePerHour lets you post projects absolutely free and attract freelance coders. The freelancers that sign up are vetted by their moderation team to ensure higher quality freelancers to choose from.
Hire Dedicated Developers From Your Team In India
Your eventual hires are only as good as the people in your pool, so you will always want to find the best, most qualified candidates to populate that pool. The better your candidate pool, the faster you’ll be able to go from interview to hire, and the more satisfied both you and your new hires will be with their career. The first thing you need to know before you start is that, while “developer” is a specialized field, it’s still quite broad.
- Despite accelerating demand for coders, Toptal prides itself on almost Ivy League-level vetting.
- Be sure to choose sites that are giving you access to quality candidates before you post your job offer.
- However, working with freelance developers is a completely different story since they might not be dedicated to your project fully.
- Below are the simple steps we follow when you decide to hire our dedicated Android developers who are adept at delivering dynamic, custom, and scalable solutions.
- From small tasks to full-stack development – you can have it all.
- It is a job board that maximizes a clients’ ability to reach a wide audience when posting an ad.
- Having good business sense allows computer programmers to think past simple code and take into account factors that can contribute to the value of the project.
This is true of both very junior candidates, and also more experienced people switching from other careers. As I mentioned, the two jobs of an engineer are to understand complex concepts, and then communicate them clearly. Somebody who can do just one or the other may have a brilliant career in some other field, but is going to be an inferior engineer. Syntax and API questions are aimed at finding relevant experience but they are bad ways of doing so. Instead, talk about the technology they’re going to be working with. You’re not looking to hire or pass on the basis of any individual fact. If they are weak on the skills they need for the job, then find a topic they know a lot about instead, and get them to talk about it, if necessary explaining it to you.
Hiring these people, even to get you through a crunch, is not worth what it costs. And if you hire one by mistake, fire them fast, and without hesitation. It’s important that they’re aware of this contract, too. You want your interviewee to be relaxed and comfortable, because that is the state they’ll be in when they’re doing their job . Answers you get from candidates who are stressed or panicky are basically useless. This is true even if they’re good answers, because they’re not representative answers. Stress and panic are not sustainable states, so you risk hiring someone who only performs when pressured to do so.
Will I Have The Complete Control Over Software Engineers I Outsource
Plus, a recent study showed that 25% of recent hires found their current job through networking. When it comes to skills, you’ll want to add both hard and soft skills to your job description.
SimSim is a web-based searching platform created by our PHP developers. It gives you the facility to search any product or service by filtering them according to their categories. It provides a panel for each type of user whether it is a buyer or a seller. At PixelCrayons, our expert team of expert developers have experience in developing Digital where to hire programmers Banking and Finance Solutions that acknowledges security and confidentiality. Abridge the gap between tutor and students by the eLearning apps developed by our proficient developers who provide user-friendly design and customized features. As of now, our experienced developers and coders have a record of 95% timely completion of the projects.
Excellent Work, Super Fast, Super Quality And Understood The Brief Perfectly!
UX design is a process of deciding the experience of your product. It’s pre-work that allows you to define the scope of your project and create a prototype. Plus, going through your project as a user eliminates waste during product development. To answer those questions, you need to know what your project does and how it’s going to do it. By the time you’ve committed to hiring a programmer, the idea for your project – i.e., what it does – should be well vetted.
Database management, security, hardware interfacing, APIs and all manner of other skills. App developers usually charge based on their skills and experience. The wider or deeper their skillset, the more they charge. However, no app developer wants to jump through numerous hoops or perform dozens of tests or tasks before being hired. Balance is required to get a feel for the developer and hire them in a fast and effective way.
Our developers work 5 days in a week excluding the week-offs such as Saturday and Sunday. They are available for 8 hours a day, but in case of priority projects, time doesn’t matter to our coders. All our developers have 5+ years of experience and can develop automotive applications that will increase your custom base and provide your business with interactive exposure. Our dedicated Indian developers have experience in developing m-health applications that will provide you with healthcare access and less diagnostic errors. You can hire programmers in India of your choice by having a look at the resume of our developers.
They might not be a perfect fit for your company right now, but in the future…who knows? Provide them with a good interview cost transparency experience and show that you valued their time and potential as a software developer, and they’ll remember you fondly.
Whether you want to hire a mobile app developer or a web developer for your own project or client’s project, Your Team in India is a one-stop-solution. Our offshore development services help you leverage our industry expertise and technical capabilities to boost your business growth. For example, good mobile app development would ensure a good user experience that works well on both platforms. Therefore, you’ll need to ensure that any mobile app developers you work with understand all of these peculiarities. Recruiters at Daxx provide realistic timelines and help you hire startup programmers who meet your requirements, have knowledge of specific technologies, and match your team dynamics. Toptal is a marketplace for top freelance developers and coders. A lot will depend on the complexity of the mobile app you’re developing and the language or platform you’re developing it for.
Author: Alex Wilhelm
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