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8,094 | I have a fairly large network with eleven commodities and arc capacities that are commodity-dependent (i.e. an arc may have a higher capacity for one commodity than another). I'm solving a protection-interdiction-restoration problem using Benders' decomposition, and running into some initial error because (I believe) the network is unbalanced so there is unmet demand to start. What would be a potential way to check how the network is unbalanced? The supply and demand for each commodity are equal across the entire network, but there may be some issue with arc capacity or general connectivity. | 2022/03/19 | [
"https://or.stackexchange.com/questions/8094",
"https://or.stackexchange.com",
"https://or.stackexchange.com/users/9334/"
] | >
> “Nothing takes place in the world whose meaning is not that of some maximum or minimum.”
> ― Leonhard Euler
>
>
>
But as in many theoretical and industrial problems, the main difficulty is not to formulate the problem, but to define the objective function...
I think at least two types of costs should be considered: how many people are killed and whether you take actions. Then it is an open question that how one should set the coefficient. | I cover this scenario in my ethics class for IT, so I would like to share my perspective. The trolley problem is a hypothetical scenario that is often used to highlight the issue of **imperfect information** in utilitarianism.
A very common argument is: the five people are a family, and the single man is a railworker without a family. You calculate the lost happiness, and decide to flip the switch to kill the single man.
What you don't know is that that single man was working as a railway assistant in his spare time as a student, and he was developing a cure for cancer. By sparing the lives of five, you have stopped the cure for cancer and millions will die as a result. The argument is that you *could not have known*. Not only is this a split-second decision which would affect your access to information, but even if you had all the time in the world to deliberate, you don't know all the "what ifs".
So you essentially operate under an assumption of fixed, incomplete information. What I want to say with my answer, is to consider this an imperfect information issue, on which there is of course plenty of research on. |
8,094 | I have a fairly large network with eleven commodities and arc capacities that are commodity-dependent (i.e. an arc may have a higher capacity for one commodity than another). I'm solving a protection-interdiction-restoration problem using Benders' decomposition, and running into some initial error because (I believe) the network is unbalanced so there is unmet demand to start. What would be a potential way to check how the network is unbalanced? The supply and demand for each commodity are equal across the entire network, but there may be some issue with arc capacity or general connectivity. | 2022/03/19 | [
"https://or.stackexchange.com/questions/8094",
"https://or.stackexchange.com",
"https://or.stackexchange.com/users/9334/"
] | >
> “Nothing takes place in the world whose meaning is not that of some maximum or minimum.”
> ― Leonhard Euler
>
>
>
But as in many theoretical and industrial problems, the main difficulty is not to formulate the problem, but to define the objective function...
I think at least two types of costs should be considered: how many people are killed and whether you take actions. Then it is an open question that how one should set the coefficient. | In a way, I suppose it could be, but at the same time I don't believe it is.
Assuming all variables are known then it could be considered an optimisation algorithm - and self-driving cars would probably have to face at some point (i.e. "I can't stop in time and there's oncoming traffic - do I plough into the pedestrian in my path, or swerve into the oncoming traffic?").
HOWEVER, the whole point of the trolley problem is that you can't possibly know all of the variables in those kind of situations. That's what makes it an ethical conundrum, not an optimisation algorithm... Although, the subjective decision of what to do in answer to this ethical conundrum could be used to drive optimisation algorithms. |
8,094 | I have a fairly large network with eleven commodities and arc capacities that are commodity-dependent (i.e. an arc may have a higher capacity for one commodity than another). I'm solving a protection-interdiction-restoration problem using Benders' decomposition, and running into some initial error because (I believe) the network is unbalanced so there is unmet demand to start. What would be a potential way to check how the network is unbalanced? The supply and demand for each commodity are equal across the entire network, but there may be some issue with arc capacity or general connectivity. | 2022/03/19 | [
"https://or.stackexchange.com/questions/8094",
"https://or.stackexchange.com",
"https://or.stackexchange.com/users/9334/"
] | I totally agree with @JorisKinable, that the problem can be formulated as some version of a network flow problem *if* a clear objective function is known.
But that seems to be the very essence of the Trolley problem: there is no single, clear-cut objective function. If it was just a question of injuring the least amount of people, the problem is trivial in the original version depicted in the picture1. But it is an ethical conundrum, where you cannot objectively quantify the outcome of a decision. Hence, I am inclined to say no, this is not an optimization problem.
---
1 It is not necessarily trivial in more complicated situations | >
> “Nothing takes place in the world whose meaning is not that of some maximum or minimum.”
> ― Leonhard Euler
>
>
>
But as in many theoretical and industrial problems, the main difficulty is not to formulate the problem, but to define the objective function...
I think at least two types of costs should be considered: how many people are killed and whether you take actions. Then it is an open question that how one should set the coefficient. |
8,094 | I have a fairly large network with eleven commodities and arc capacities that are commodity-dependent (i.e. an arc may have a higher capacity for one commodity than another). I'm solving a protection-interdiction-restoration problem using Benders' decomposition, and running into some initial error because (I believe) the network is unbalanced so there is unmet demand to start. What would be a potential way to check how the network is unbalanced? The supply and demand for each commodity are equal across the entire network, but there may be some issue with arc capacity or general connectivity. | 2022/03/19 | [
"https://or.stackexchange.com/questions/8094",
"https://or.stackexchange.com",
"https://or.stackexchange.com/users/9334/"
] | I totally agree with @JorisKinable, that the problem can be formulated as some version of a network flow problem *if* a clear objective function is known.
But that seems to be the very essence of the Trolley problem: there is no single, clear-cut objective function. If it was just a question of injuring the least amount of people, the problem is trivial in the original version depicted in the picture1. But it is an ethical conundrum, where you cannot objectively quantify the outcome of a decision. Hence, I am inclined to say no, this is not an optimization problem.
---
1 It is not necessarily trivial in more complicated situations | I cover this scenario in my ethics class for IT, so I would like to share my perspective. The trolley problem is a hypothetical scenario that is often used to highlight the issue of **imperfect information** in utilitarianism.
A very common argument is: the five people are a family, and the single man is a railworker without a family. You calculate the lost happiness, and decide to flip the switch to kill the single man.
What you don't know is that that single man was working as a railway assistant in his spare time as a student, and he was developing a cure for cancer. By sparing the lives of five, you have stopped the cure for cancer and millions will die as a result. The argument is that you *could not have known*. Not only is this a split-second decision which would affect your access to information, but even if you had all the time in the world to deliberate, you don't know all the "what ifs".
So you essentially operate under an assumption of fixed, incomplete information. What I want to say with my answer, is to consider this an imperfect information issue, on which there is of course plenty of research on. |
8,094 | I have a fairly large network with eleven commodities and arc capacities that are commodity-dependent (i.e. an arc may have a higher capacity for one commodity than another). I'm solving a protection-interdiction-restoration problem using Benders' decomposition, and running into some initial error because (I believe) the network is unbalanced so there is unmet demand to start. What would be a potential way to check how the network is unbalanced? The supply and demand for each commodity are equal across the entire network, but there may be some issue with arc capacity or general connectivity. | 2022/03/19 | [
"https://or.stackexchange.com/questions/8094",
"https://or.stackexchange.com",
"https://or.stackexchange.com/users/9334/"
] | This problem can be formulated as a network flow problem. Each train is a commodity. The train network is represented as a graph. The cost of using an arc is equal to the number of people killed. The trains need to be moved from their origin to their destination with minimum total cost.
I don't know the specifics of this bizarre problem, but things get a little weird if 2 trains can use the same arc: does the first train kill the people and the second train gets to use the arc for free? You could treat this variation as a fixed charge network flow problem.
Definitely one of the weirdest questions I've seen. | Many discussions of the Trolley Problem ignore an important second-order effect: people who are willing to take evasive maneuvers that protect reckless people at the expense of those who would not otherwise have been in their path encourage recklessness. In an extreme case, suppose a group of five people decided to check before crossing the tracks to check how many people were on the other line, and concluded that if there were four or fewer then they would be safe. Should the train operator value the lives of five over the lives of one, or should he value the life of a worker who followed tag-out procedures over the lives of people who would have sacrificed him to avoid the inconvenience of waiting for the trolley to pass?
Even if one replaces the situation with a driver on a road, a similar issue arises: anyone whose path might intersect with a motorist whose path ahead is presently clear should be prepared for the possibility that the motorist might continue along that path. By contrast, it will often not be possible for all other motorists to be prepared for everything the motorist might do to avoid something on his primary path. If a motorist swerves to successfully avoid someone who is running a red light, but ends up colliding with someone else instead, the motorist's actions will have protected a reckless driver at the cost of an innocent one.
To be sure, the automotive version of the problem raises other issues, since the evasive maneuver may replace a T-bone collision with a side-swipe, and it's even possible that the alternative to the side-swipe might have been three-car collision that would have been worse for everyone involved. In general, though, to the extent that the "trolley problem" is an optimization problem, the goal should be to optimize people's ability to avoid making bad decisions in the first place. |
10,048 | I have a 9-hour layover at JFK (New York). From 10 am until 7 pm (although I have to check in at 3 pm for personal reasons).
This being in the middle of a 2-day travel, I would love to take a break to shower and rest a bit. How can I do that for cheap?
I have 3 pieces of luggage and 2 carry-on, if it matters... | 2012/10/07 | [
"https://travel.stackexchange.com/questions/10048",
"https://travel.stackexchange.com",
"https://travel.stackexchange.com/users/3306/"
] | I discovered that option by reading this website: airport lounges sometimes offer good and reasonably priced solutions to rest.
Two questions could have relevant answers:
[one about what the different lounges offer](https://travel.stackexchange.com/questions/2099/how-to-research-facilities-ratings-of-us-airport-lounges-online) and [one about how to get there for cheap](https://travel.stackexchange.com/questions/7744/free-cheap-ways-to-get-airport-lounge-access)
EDIT: with the PriorityPass, as you mention you have it, the KAL lounge requires you to have a boarding pass to enter. The United Club has conditions on how you got your card (if it's from your bank you can't) and the Oasis lounge allows you to stay no more than 3 hours. In the end these conditions are annoying but I think you can make it. | I have a very similar JFK layover coming up - I've researched the question a bit, and here's what I could find:
* [Between9and5 website](https://www.between9and5.com/) lets you search for "day rates" at hotels near airports. There are a few options listed for JFK at around $75 for a 10am-to-3pm stay.
* Apparently you can find the best "day rates" by calling hotels near the airport directly (not the 800 number but the direct hotel number). The best "day rates" are often released in the morning (i.e. you can't book them in advance).
* Lounges vary in their "sleeper-friendliness". For example, the official United lounge policy forbids sleeping (I don't know whether this is enforced). On the other hand, the flagship Delta lounge in Terminal 4 of JFK has a special "relaxation room", and the policy makes no mention of sleeping (that I could find). Lots of lounges also offer showers.
* [Another website about sleeping near airports](http://www.sleepinginairports.net/) may also be a good resource
* Some people recommend getting an overnight hotel rate the night before, with late checkout (e.g. 3pm), and then calling the hotel to say that you'll arrive in the morning. Apparently Priceline works well for this. |
35,441 | Why are the leading edges of the wings, horizontal stabiliser and vertical stabiliser and the engine's inlets made from Aluminium?
[](https://i.stack.imgur.com/MTlNV.gif) | 2017/02/10 | [
"https://aviation.stackexchange.com/questions/35441",
"https://aviation.stackexchange.com",
"https://aviation.stackexchange.com/users/889/"
] | There are probably many factors in choosing aluminum vs. composites.
A big one is bird strikes. The leading edges are at the highest risk for this. Metal tends to absorb the impact better while retaining its strength, while composites would tend to delaminate and become much weaker. Resistance to in-flight hail must also be considered.
[](https://i.stack.imgur.com/odCQBm.jpg)
[](https://i.stack.imgur.com/HJBWCm.jpg)
(Source [Left](http://www.moretimetotravel.com/wp-content/uploads/2013/08/P1130348.jpg), [Right](http://images.gawker.com/17um8exutpphmjpg/c_scale,fl_progressive,q_80,w_800.jpg)) *Comparison of bird strike effect on aluminum and carbon fiber.*
Anti ice was also mentioned. These areas are heated with bleed air (or, for the 787, electrical elements) to melt or prevent any ice formation. Metals do much better at high temperatures than composites, which would tend to melt or lose strength. Metals are also able to conduct the anti ice heat better than composites.
Another factor could be manufacturing. These surfaces have a lot of curvature. Composite panels are often reinforced with honeycomb core, which is best on relatively flat surfaces. Of course composites could be made into these shapes, but the shape would limit material and configuration options. Metal is also easier to work with or repair than composites.
As far as choosing aluminum over other metals, it tends to be very light and cheap for its strength, has decent temperature capability for anti-ice, and when properly used is fairly resistant to corrosion or fatigue.
The nose does not have anti ice and must serve as a cover for the weather radar. Composites can be made relatively transparent to radar, but metal would tend to block the waves. | Aluminum is used for erosion prevention. There is no composite solution which can withstand the erosion caused by water/rain or FOD (sand/grit). In addition, aluminum leading edges transfer heat better than composites, which allows for improved anti-icing. |
35,441 | Why are the leading edges of the wings, horizontal stabiliser and vertical stabiliser and the engine's inlets made from Aluminium?
[](https://i.stack.imgur.com/MTlNV.gif) | 2017/02/10 | [
"https://aviation.stackexchange.com/questions/35441",
"https://aviation.stackexchange.com",
"https://aviation.stackexchange.com/users/889/"
] | There are probably many factors in choosing aluminum vs. composites.
A big one is bird strikes. The leading edges are at the highest risk for this. Metal tends to absorb the impact better while retaining its strength, while composites would tend to delaminate and become much weaker. Resistance to in-flight hail must also be considered.
[](https://i.stack.imgur.com/odCQBm.jpg)
[](https://i.stack.imgur.com/HJBWCm.jpg)
(Source [Left](http://www.moretimetotravel.com/wp-content/uploads/2013/08/P1130348.jpg), [Right](http://images.gawker.com/17um8exutpphmjpg/c_scale,fl_progressive,q_80,w_800.jpg)) *Comparison of bird strike effect on aluminum and carbon fiber.*
Anti ice was also mentioned. These areas are heated with bleed air (or, for the 787, electrical elements) to melt or prevent any ice formation. Metals do much better at high temperatures than composites, which would tend to melt or lose strength. Metals are also able to conduct the anti ice heat better than composites.
Another factor could be manufacturing. These surfaces have a lot of curvature. Composite panels are often reinforced with honeycomb core, which is best on relatively flat surfaces. Of course composites could be made into these shapes, but the shape would limit material and configuration options. Metal is also easier to work with or repair than composites.
As far as choosing aluminum over other metals, it tends to be very light and cheap for its strength, has decent temperature capability for anti-ice, and when properly used is fairly resistant to corrosion or fatigue.
The nose does not have anti ice and must serve as a cover for the weather radar. Composites can be made relatively transparent to radar, but metal would tend to block the waves. | There are a few reasons, the first is that the leading edge of the wing will be eroded in service by flying through dust, sand rain, hail etc. Metals are always typically used on such surfaces (termed an 'erosion shield') to reduce this effect, and also because minor damage can be polished out to keep the aircraft looking nice. Aluminum isn't the hardest waring material in this environment, but it is the lightest. Rotor blades would typically use Titanium or Nickel instead, as these harder metals work better in this more extreme environment.
The second reason is lightning strike; the leading edges of wings are common attachment points for lightning, so they are grounded to the airframes lightning return network. Making them from highly conductive metals can reduce the immediate damage caused as a result lightning attachment. |
51,848,474 | I am a backend developer and I would like to know what are the common technologies for building real-time servers. I know I could use a service like Firebase, but I really want to create it. I have some experience using Websockets on Java, but I would like to know more ways to achieve a real-time server. When I say real-time, I mean something like Facebook. I also would like to know how to scale real-time servers.
Thank you all! | 2018/08/14 | [
"https://Stackoverflow.com/questions/51848474",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/4898146/"
] | I've asked the same in multiple forums. Common answer to this question is strangely enough still:
* [*WebSocket*](https://developer.mozilla.org/en-US/docs/Web/API/WebSockets_API)
* [*Socket.io*](https://socket.io/)
* [*Server-Sent Events (SSE)*](https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events/Using_server-sent_events)
But those are mainly ways of transporting or streaming events to the clients. Something needs to be built on top of it. And there are multiple other things to consider, such as:
Considerations for real-time API's
----------------------------------
*What events to send to the client*
*How to send each client only the events they need*
*How to handle authorization for events*
*Where to keep state on the event subscriptions (for stateless services)*
*How to recover from missed events due to lost connections and service crashes*
*Producing events for search-, or pagination queries*
*How to scale*
Publish/Subscribe solutions
---------------------------
There are multiple pub/sub solutions out there, such as:
* [Pusher](https://pusher.com/)
* [PubNub](https://www.pubnub.com/)
* [SocketCluster](https://stackshare.io/socketcluster)
* [etc.](https://stackshare.io/firebase/alternatives)
But because of the limitation of a topic based pub/sub architecture, some of the above questions are still left unanswered and has to be dealt with by yourself. Examples are lost connections, where [Pusher has no fallback](https://stackoverflow.com/questions/42097246/pusher-doesnt-receive-events-after-reconnect), neither does [SocketCluster](https://github.com/SocketCluster/socketcluster-server/issues/3), and [PubNub has a limited queue](https://support.pubnub.com/support/solutions/articles/14000043538-can-i-use-catchup-to-retrieve-older-messages-).
Resgate - Realtime API Gateway
------------------------------
An alternative to the traditional topic based pub/sub pattern is using a resource-aware *realtime API Gateway*, such as [Resgate](https://github.com/jirenius/resgate).
Instead of the client subscribing to topics, the gateway keeps track on which resources (objects or arrays) that the client has fetched, keeping the client data up to date until it unsubscribes.
As a developer of Resgate, I can really recommend checking it out as it solves all above question, is language agnostic, simple and light-weight, and blazingly fast.
Read more at [NATS blog](https://nats.io/blog/resgate_nats/).
Scaling
-------
Let's say you want to scale both in the number of concurrent clients *and* the number of events that is produced. You will eventually need to ensure each client only gets the data they are interested in through either traditional topic based publish/subscribe, or through resource subscriptions. All above solutions handles that.
I also assume all the above mentioned solutions scales concurrent clients by allowing you to add more nodes/servers that handles the persistent WebSocket connections.
With Resgate, first level of scaling is done by simply running multiple instances (it is a simple executable), and adding a load balancer that distributes the connection evenly between them:
[](https://i.stack.imgur.com/RVm0e.png)
**Handling 100M concurrent clients**
Let's say a single Resgate instance handles 10000 persistent WebSocket connections, and you can add 10000 Resgates (distributed to multiple data centers) to a single [NATS Server](https://nats.io/). This would allow a total of 100M connections. Of course, depending on your data, you might have other scaling issues as well, such as network traffic ;) .
A second layer of scaling (and adding redundancy) would be to replicate the whole setup to different data centers, and have the services synchronize their data between the data centers using other tools like Kafka, CockroachDB, etc.
### Scaling data retrieval
With the traditional publish/subscribe solution that only deals with events, you will also have to handle scaling for the HTTP (REST) requests.
With Resgate, this is not required, as resource data is also fetched over the WebSocket connection. This allows Resgate not only to ensure that resource data and events are synchronized (another issue with separate pub/sub solutions), but also that the data can be *cached*. If multiple clients requests the same data, Resgate will only need to fetch it from the service once, effectively improving scalability. | Butterfly Server .NET is a real-time server written in C# allowing you to create real-time apps. You can see the source at <https://github.com/firesharkstudios/butterfly-server-dotnet>. |
32,277 | What are some good introductory books on Galois connections? I have read *Galois Theory* from Emil Artin, *Algebra* from Saunder Mac Lane, and I'm starting Serge Lang. | 2011/04/11 | [
"https://math.stackexchange.com/questions/32277",
"https://math.stackexchange.com",
"https://math.stackexchange.com/users/7667/"
] | Steven Roman's book [Field Theory](http://rads.stackoverflow.com/amzn/click/0387276777) treats the Galois Theory part of his book using Galois connections. I don't have the book but I had browsed through it one time when I was looking for a different book in my university library, and I have to say that it seemed pretty good.
In particular, take a look at chapter 6, where he develops some theory about Galois connections and applies it to study the Galois correspondence. | George Bergman's [Universal Algebra book](http://math.berkeley.edu/~gbergman/245/) has a chapter that discusses Galois connections ([Chapter 5](http://math.berkeley.edu/~gbergman/245/Ch.5.pdf)); the link is to the PDF version. I like it, though it's not very extensive (just six pages). |
10,926 | It seems that Qing Liu decided to leave MSE. Know anyone why he did this? (He was QiL, QiL'8, and lately user18119. ) | 2013/09/11 | [
"https://math.meta.stackexchange.com/questions/10926",
"https://math.meta.stackexchange.com",
"https://math.meta.stackexchange.com/users/-1/"
] | Qing Liu decided to leave for reasons that he has apparently chosen to keep private, taking care to make as little noise as possible in his departure.
I think that we should respect that by not prying into what is clearly a personal decision. | Some of the the reasons appear to be public, and there is no reason to believe anything about the user wanting privacy or not. He happens to have not stated the reasons, but people requesting deletion rarely have any reason to open a meta thread explaining things. The only case that comes to mind is one user who staged a public protest (it was phony but successful; he opened a new account). I do not remember anybody saying goodbye except in user profiles that did not belong to deleted accounts.
At the time of the previous meta thread about this deletion, it was still possible to check the user's recent comment history. A few days before the deletion he had tried to remove an answer after commenting that it was no longer relevant to the question. This was denied for some SE reason, and after surprise was expressed about this (along the lines, "what? you mean it is not my answer to delete?") a moderator commented with an explanation of Creative Commons licenses and such. The deletion request came soon after that. |
70,268 | Say that a realtor suggests that you need a certain subjective requirement to be approved, but that the owner is somewhat flexible. Now, this is not a legal requirement, which would be illegal to break, but rather a subjective requirement, like that of an owner who wanted to make a decision on what requirements to make of the buyer before buying a house.
As a way to push things along, you offer a quantity of money to the realtor as a thanks for their time. In reality, you think of it as a sort of "bribe", to get them to do what you want, when they had previously made up their mind against your favor; but it's not really bribery, because you are not asking them to do anything illegal, only to try to convince the owner to decide in your favor. The compensation, as justified, is merely for the realtor's time and effort.
How would this circumstance be evaluated by ethical systems in philosophy? | 2020/02/17 | [
"https://philosophy.stackexchange.com/questions/70268",
"https://philosophy.stackexchange.com",
"https://philosophy.stackexchange.com/users/44366/"
] | The realtor is the agent of the seller. The ethical violations come in when you attempt to induce the realtor to do something that is against the interests of his client. That is, whenever you attempt to change the realtor from being the seller's agent into your agent, that's an ethical violation.
For example: If you tried to induce the realtor to hide information or provide false or misleading information, that would be an ethical violation. "Sell to him or we won't get anybody else at this price."
The reason that realtors usually work on commission is to try to get them to operate in their client's best interest. This presumes that "maximum selling price" is in the seller's interest. If you put your money into the realtor's hands, you may be pushing the realtor into a position where his motivations no longer align with the seller's interests. | I think your question is not a philosophy question but more of an ethics question. It sounds like the question you are asking could be answered by asking "would the subjective requirement hurt/damage someone else?". ex: it is illegal to build a granny flat behind my house in my city with out approval because it affects the economy, I build a granny flat to increase property value when I sell, nobody can tell the difference, 5 years later the economy isn't keeping up. This doesn't directly affect me but the indirect consequence makes it morally unjust. |
48,805 | I am running a project to compare features of different backtesting software.
A viewpoint to touch is on whether pricey software come with better characteristics/results thus justifying a higher price.
For the purpose, it would be great to compare some free backtesting software and see how these relate.
Anyone who can suggest any free one? | 2019/09/20 | [
"https://quant.stackexchange.com/questions/48805",
"https://quant.stackexchange.com",
"https://quant.stackexchange.com/users/39388/"
] | Statmetrics ([www.statmetrics.org](https://www.statmetrics.org)) is a free Android app for quants and supports backtesting for multiple portfolios. | This option is not exactly free, however I thought it was worth mentioning.
Year ago you had to pay fees for using Tradestation, like $100 per month or something like this, now there's no charge. Although you must open an account (I don't recall the account minimums).
You do have to pay a small monthly fee for certain data feeds (i.e. Futures), although can you can always import your own 3rd party data. They have some of the most mature backtesting software, including Walk-forward optimization.
If you do use their data network, you have access to 1-minute bars, seconds, ticks. You can also run standard parameters optimizations, and you can run it inside of Windows VMs if your a Mac user. You can also scale it across multiple machines in offline mode, which is powerful if you want to run optimizations in parallel.
To code your strategies, you must use EasyLanguage. There's also the Optimizations API, where one option allows you to provide a XML file with the optimization parameters that you want to run.
For years I resisted Tradestation for various reasons, but I finally caved and now have learned to love it. Its very powerful if you know how to use it. |
48,805 | I am running a project to compare features of different backtesting software.
A viewpoint to touch is on whether pricey software come with better characteristics/results thus justifying a higher price.
For the purpose, it would be great to compare some free backtesting software and see how these relate.
Anyone who can suggest any free one? | 2019/09/20 | [
"https://quant.stackexchange.com/questions/48805",
"https://quant.stackexchange.com",
"https://quant.stackexchange.com/users/39388/"
] | Statmetrics ([www.statmetrics.org](https://www.statmetrics.org)) is a free Android app for quants and supports backtesting for multiple portfolios. | Try [www.infertrade.com](https://www.infertrade.com) its completely free, very simple and accurate tool. I am sure you love it. |
48,805 | I am running a project to compare features of different backtesting software.
A viewpoint to touch is on whether pricey software come with better characteristics/results thus justifying a higher price.
For the purpose, it would be great to compare some free backtesting software and see how these relate.
Anyone who can suggest any free one? | 2019/09/20 | [
"https://quant.stackexchange.com/questions/48805",
"https://quant.stackexchange.com",
"https://quant.stackexchange.com/users/39388/"
] | [*Backtesting.py*](https://kernc.github.io/backtesting.py/) framework, written in Python, has got a simple API and provides quick, interactive results. It's free and open-source.
[](https://kernc.github.io/backtesting.py/) | This option is not exactly free, however I thought it was worth mentioning.
Year ago you had to pay fees for using Tradestation, like $100 per month or something like this, now there's no charge. Although you must open an account (I don't recall the account minimums).
You do have to pay a small monthly fee for certain data feeds (i.e. Futures), although can you can always import your own 3rd party data. They have some of the most mature backtesting software, including Walk-forward optimization.
If you do use their data network, you have access to 1-minute bars, seconds, ticks. You can also run standard parameters optimizations, and you can run it inside of Windows VMs if your a Mac user. You can also scale it across multiple machines in offline mode, which is powerful if you want to run optimizations in parallel.
To code your strategies, you must use EasyLanguage. There's also the Optimizations API, where one option allows you to provide a XML file with the optimization parameters that you want to run.
For years I resisted Tradestation for various reasons, but I finally caved and now have learned to love it. Its very powerful if you know how to use it. |
48,805 | I am running a project to compare features of different backtesting software.
A viewpoint to touch is on whether pricey software come with better characteristics/results thus justifying a higher price.
For the purpose, it would be great to compare some free backtesting software and see how these relate.
Anyone who can suggest any free one? | 2019/09/20 | [
"https://quant.stackexchange.com/questions/48805",
"https://quant.stackexchange.com",
"https://quant.stackexchange.com/users/39388/"
] | [*Backtesting.py*](https://kernc.github.io/backtesting.py/) framework, written in Python, has got a simple API and provides quick, interactive results. It's free and open-source.
[](https://kernc.github.io/backtesting.py/) | Try [www.infertrade.com](https://www.infertrade.com) its completely free, very simple and accurate tool. I am sure you love it. |
48,805 | I am running a project to compare features of different backtesting software.
A viewpoint to touch is on whether pricey software come with better characteristics/results thus justifying a higher price.
For the purpose, it would be great to compare some free backtesting software and see how these relate.
Anyone who can suggest any free one? | 2019/09/20 | [
"https://quant.stackexchange.com/questions/48805",
"https://quant.stackexchange.com",
"https://quant.stackexchange.com/users/39388/"
] | [](https://i.stack.imgur.com/2nH2A.png)
[PyInvesting](https://pyinvesting.com) allows you to backtest your investment strategy without writing a single line of code:
* Simply fill in a form specifying your backtest details
* Create signals using both technical and fundamental data from 2006 onwards
* Backtest your prefered investment strategy (Relative Strength, Fundamentals,
Moving Average and Strategic Allocation)
* Performance analysis is a breeze with our clean and beautiful user interface
* Extensive coverage of instruments (stocks, ETFs, FX and Crypto) across multiple
exchanges
* Allows you to go live and profit from your investment strategy where you will receive daily email updates about any live orders.
Disclaimer: I’m the founder of [pyinvesting.com](https://pyinvesting.com), a backtesting software for stock market investors. | This option is not exactly free, however I thought it was worth mentioning.
Year ago you had to pay fees for using Tradestation, like $100 per month or something like this, now there's no charge. Although you must open an account (I don't recall the account minimums).
You do have to pay a small monthly fee for certain data feeds (i.e. Futures), although can you can always import your own 3rd party data. They have some of the most mature backtesting software, including Walk-forward optimization.
If you do use their data network, you have access to 1-minute bars, seconds, ticks. You can also run standard parameters optimizations, and you can run it inside of Windows VMs if your a Mac user. You can also scale it across multiple machines in offline mode, which is powerful if you want to run optimizations in parallel.
To code your strategies, you must use EasyLanguage. There's also the Optimizations API, where one option allows you to provide a XML file with the optimization parameters that you want to run.
For years I resisted Tradestation for various reasons, but I finally caved and now have learned to love it. Its very powerful if you know how to use it. |
48,805 | I am running a project to compare features of different backtesting software.
A viewpoint to touch is on whether pricey software come with better characteristics/results thus justifying a higher price.
For the purpose, it would be great to compare some free backtesting software and see how these relate.
Anyone who can suggest any free one? | 2019/09/20 | [
"https://quant.stackexchange.com/questions/48805",
"https://quant.stackexchange.com",
"https://quant.stackexchange.com/users/39388/"
] | Question has been discussed elsewhere. Zorro and Turing Trader are the two free backtesting engines I know of. As to which is "best" - depends on how you define "best". | This option is not exactly free, however I thought it was worth mentioning.
Year ago you had to pay fees for using Tradestation, like $100 per month or something like this, now there's no charge. Although you must open an account (I don't recall the account minimums).
You do have to pay a small monthly fee for certain data feeds (i.e. Futures), although can you can always import your own 3rd party data. They have some of the most mature backtesting software, including Walk-forward optimization.
If you do use their data network, you have access to 1-minute bars, seconds, ticks. You can also run standard parameters optimizations, and you can run it inside of Windows VMs if your a Mac user. You can also scale it across multiple machines in offline mode, which is powerful if you want to run optimizations in parallel.
To code your strategies, you must use EasyLanguage. There's also the Optimizations API, where one option allows you to provide a XML file with the optimization parameters that you want to run.
For years I resisted Tradestation for various reasons, but I finally caved and now have learned to love it. Its very powerful if you know how to use it. |
48,805 | I am running a project to compare features of different backtesting software.
A viewpoint to touch is on whether pricey software come with better characteristics/results thus justifying a higher price.
For the purpose, it would be great to compare some free backtesting software and see how these relate.
Anyone who can suggest any free one? | 2019/09/20 | [
"https://quant.stackexchange.com/questions/48805",
"https://quant.stackexchange.com",
"https://quant.stackexchange.com/users/39388/"
] | [](https://i.stack.imgur.com/2nH2A.png)
[PyInvesting](https://pyinvesting.com) allows you to backtest your investment strategy without writing a single line of code:
* Simply fill in a form specifying your backtest details
* Create signals using both technical and fundamental data from 2006 onwards
* Backtest your prefered investment strategy (Relative Strength, Fundamentals,
Moving Average and Strategic Allocation)
* Performance analysis is a breeze with our clean and beautiful user interface
* Extensive coverage of instruments (stocks, ETFs, FX and Crypto) across multiple
exchanges
* Allows you to go live and profit from your investment strategy where you will receive daily email updates about any live orders.
Disclaimer: I’m the founder of [pyinvesting.com](https://pyinvesting.com), a backtesting software for stock market investors. | Try [www.infertrade.com](https://www.infertrade.com) its completely free, very simple and accurate tool. I am sure you love it. |
48,805 | I am running a project to compare features of different backtesting software.
A viewpoint to touch is on whether pricey software come with better characteristics/results thus justifying a higher price.
For the purpose, it would be great to compare some free backtesting software and see how these relate.
Anyone who can suggest any free one? | 2019/09/20 | [
"https://quant.stackexchange.com/questions/48805",
"https://quant.stackexchange.com",
"https://quant.stackexchange.com/users/39388/"
] | Question has been discussed elsewhere. Zorro and Turing Trader are the two free backtesting engines I know of. As to which is "best" - depends on how you define "best". | Try [www.infertrade.com](https://www.infertrade.com) its completely free, very simple and accurate tool. I am sure you love it. |
150,218 | Let's imagine a post-scarcity society where everyone has unlimited access to food, energy and the aging problem has been solved so people are practically immortal.
Now my understanding is that, our brains have evolved in a way that maximizes our survival so our brains reward us for doing things that increases our survival chance (like eating, mating, seeking power and status to increase our security..etc) and discourage us from doing things that would decrease our survival chances. This is mainly done by secreting hormones like Dopamine, Oxytocin and Serotonin which make us want to repeat the beneficial action.
In my post-scarcity scenario, our survival will not be at risk since everyone is getting all the basic needs to stay alive and all the medical requirements to prevent death. Now, many many generations after us (millions of years), what will be those things that will make us feel happy or sad when evolution had stopped working on basis of survival?
In other words, what will be the purpose of future humans when survival is no longer the purpose? And if the purpose becomes to get as much happiness from life, then what might bring us this happiness and with what mechanism? | 2019/07/04 | [
"https://worldbuilding.stackexchange.com/questions/150218",
"https://worldbuilding.stackexchange.com",
"https://worldbuilding.stackexchange.com/users/65058/"
] | [](https://i.stack.imgur.com/T2GGA.jpg)
Now you can't tell me that does anything for his survival. What's worse is the lifespan of creatures like elephant seals, the trauma from the battles between males on the beach significantly reducing their lifespans relative to the females.
In fact survival isn't that strong a driver of evolution except by correlation, the factors that we deem to be attractive are often those associated with strength, health and reproductive ability. The secondary factor being that those who live longer are likely to reproduce more often and hence have more descendants, but that's no longer strictly true anyway.
So we end up peacocks, the driving factor is [sexual selection](https://darwin200.christs.cam.ac.uk/node/77). | Natural selection requires pressure. If the "weak" still propagate, then evolution will stagnate and humanity will stop changing. |
150,218 | Let's imagine a post-scarcity society where everyone has unlimited access to food, energy and the aging problem has been solved so people are practically immortal.
Now my understanding is that, our brains have evolved in a way that maximizes our survival so our brains reward us for doing things that increases our survival chance (like eating, mating, seeking power and status to increase our security..etc) and discourage us from doing things that would decrease our survival chances. This is mainly done by secreting hormones like Dopamine, Oxytocin and Serotonin which make us want to repeat the beneficial action.
In my post-scarcity scenario, our survival will not be at risk since everyone is getting all the basic needs to stay alive and all the medical requirements to prevent death. Now, many many generations after us (millions of years), what will be those things that will make us feel happy or sad when evolution had stopped working on basis of survival?
In other words, what will be the purpose of future humans when survival is no longer the purpose? And if the purpose becomes to get as much happiness from life, then what might bring us this happiness and with what mechanism? | 2019/07/04 | [
"https://worldbuilding.stackexchange.com/questions/150218",
"https://worldbuilding.stackexchange.com",
"https://worldbuilding.stackexchange.com/users/65058/"
] | Natural selection does not care about purpose or happiness. The only thing that matters for natural selection is propagation of genes. Someone who is miserable but has lots of kids is a natural selection star.
Some things natural selection might select towards:
1. Not liking condoms. Whether it's due to laziness or comfort, someone who does not use a condom is good from a natural selection standpoint.
2. Not being able to use other forms of birth control. If someone is allergic to the pill or has trouble keeping a diaphragm placed, that is a natural selection good.
3. Liking sex.
4. Liking kids.
5. Willingness to abandon kids. If someone is willing to have a child and then abandon the child, that might be even more valuable than liking kids.
6. Inability to find satisfaction in activities other than sex. Someone who only finds moments of satisfaction in sex is more likely to engage in more sex than someone who has other hobbies.
7. Sexual attractiveness. People who are more in demand as sexual partners will be more successful in propagating their genes.
Even in a post-scarcity society, some things are still scarce. For example, apartments in New York City are scarce even though apartments in the United States are not. Some of that is artificial scarcity caused by zoning regulations, etc. But a great deal of that is simply that there is only so much space in New York City.
More importantly from a natural selection standpoint, a person's time is scarce. Children make time scarcer. Parents have to be more careful about organizing their time, because children take up so much of it. As society advances, there are more things to do with that time. Those other things distract from parenting. So people who don't like other activities are more likely to propagate their genes.
Notice the side effect here. People will become more miserable in every activity but sex (and possibly parenting). And sex is likely to be only a transient pleasure. It makes someone happy at that moment, but then it fades, leaving the person craving the next moment of happiness.
Parenting in a post-scarcity society might be done by robots, leaving the humans only pursuing sex. Artificial wombs may mean that pregnancy doesn't even limit sex. As soon as a prospective mother realizes that she's pregnant, she transfers the fetus to an artificial womb and continues her normal activities. A race of sex addicts. | Natural selection requires pressure. If the "weak" still propagate, then evolution will stagnate and humanity will stop changing. |
150,218 | Let's imagine a post-scarcity society where everyone has unlimited access to food, energy and the aging problem has been solved so people are practically immortal.
Now my understanding is that, our brains have evolved in a way that maximizes our survival so our brains reward us for doing things that increases our survival chance (like eating, mating, seeking power and status to increase our security..etc) and discourage us from doing things that would decrease our survival chances. This is mainly done by secreting hormones like Dopamine, Oxytocin and Serotonin which make us want to repeat the beneficial action.
In my post-scarcity scenario, our survival will not be at risk since everyone is getting all the basic needs to stay alive and all the medical requirements to prevent death. Now, many many generations after us (millions of years), what will be those things that will make us feel happy or sad when evolution had stopped working on basis of survival?
In other words, what will be the purpose of future humans when survival is no longer the purpose? And if the purpose becomes to get as much happiness from life, then what might bring us this happiness and with what mechanism? | 2019/07/04 | [
"https://worldbuilding.stackexchange.com/questions/150218",
"https://worldbuilding.stackexchange.com",
"https://worldbuilding.stackexchange.com/users/65058/"
] | Evolution will be **guided by design** rather than natural selection. Even today, we are able to change the genes of children before they are born and (possibly) [give them higher intelligence](https://sciencebusiness.net/news/eu-and-national-funders-launch-plan-free-and-immediate-open-access-journals). It is generally believed that in the future, "designer babies" will be increasingly common, with parents adding and removing genes to get the desired traits. Genes from other species could be added if desired, or the body might be changed to [produce longevity drugs](https://bioviva-science.com/blog/first-gene-therapy-successful-against-human-aging/).
Further research will likely provide ways to design genetic changes to provide specific desired traits that can't be found in any natural humans or animals. It is important to note that it is believed that genetic changes created through *in utero* (pre-birth) gene therapy will be passed on to offspring, so the entire human race (or subgroups thereof) could be evolved in this way.
[](https://i.stack.imgur.com/L104E.jpg) | Natural selection requires pressure. If the "weak" still propagate, then evolution will stagnate and humanity will stop changing. |
150,218 | Let's imagine a post-scarcity society where everyone has unlimited access to food, energy and the aging problem has been solved so people are practically immortal.
Now my understanding is that, our brains have evolved in a way that maximizes our survival so our brains reward us for doing things that increases our survival chance (like eating, mating, seeking power and status to increase our security..etc) and discourage us from doing things that would decrease our survival chances. This is mainly done by secreting hormones like Dopamine, Oxytocin and Serotonin which make us want to repeat the beneficial action.
In my post-scarcity scenario, our survival will not be at risk since everyone is getting all the basic needs to stay alive and all the medical requirements to prevent death. Now, many many generations after us (millions of years), what will be those things that will make us feel happy or sad when evolution had stopped working on basis of survival?
In other words, what will be the purpose of future humans when survival is no longer the purpose? And if the purpose becomes to get as much happiness from life, then what might bring us this happiness and with what mechanism? | 2019/07/04 | [
"https://worldbuilding.stackexchange.com/questions/150218",
"https://worldbuilding.stackexchange.com",
"https://worldbuilding.stackexchange.com/users/65058/"
] | **We'll get more religious**
The thing that seems likely in a post-scarcity society, given current demographic trends, is that many people will stop having children altogether. With all the entertainment and birth-control options available, life will be distracting enough for most people to stay self-focused and less interested in reproducing.
As Brythan pointed out, those who reproduce win at evolution over those who choose not to. It is commonly members of certain religious groups (of which I am one), who have more than the average number of children.
Liking sex won't be good enough, though (particularly if you're okay with birth control or abortion). The technology to indulge in any kind of fantasy is coming, and would surely only increase if there was nothing else that it was really necessary for people to pursue. So the groups which would be favored by natural selection are those who would have some intrinsic reason to reject the more 'sterilizing' allures - "Why NOT live in this video game, and fall in love with this other player, as a character and not as a real person - or even fall in love with that NPC?"
At the same time, even in a post-scarcity society, people will fear exponential population growth. The argument that we'll soon face collapse because more mouths means not enough for everyone has been floated since Thomas Malthus, at least, and we've had new prophecies of doom by overpopulation every few decades since then. Those will be willing to have several children must also not be the kind of people who are influenced by Population Bomb type arguments.
And lastly, it's not enough to be an eccentric who chooses go your own way - because if you're not spending time with other people in a community, you're less likely to find someone and pair off. So a communalistic tendency is also necessary.
The religious or religious-like, who value families and reject total electronic indulgence, will tend to be selected for. | Natural selection requires pressure. If the "weak" still propagate, then evolution will stagnate and humanity will stop changing. |
150,218 | Let's imagine a post-scarcity society where everyone has unlimited access to food, energy and the aging problem has been solved so people are practically immortal.
Now my understanding is that, our brains have evolved in a way that maximizes our survival so our brains reward us for doing things that increases our survival chance (like eating, mating, seeking power and status to increase our security..etc) and discourage us from doing things that would decrease our survival chances. This is mainly done by secreting hormones like Dopamine, Oxytocin and Serotonin which make us want to repeat the beneficial action.
In my post-scarcity scenario, our survival will not be at risk since everyone is getting all the basic needs to stay alive and all the medical requirements to prevent death. Now, many many generations after us (millions of years), what will be those things that will make us feel happy or sad when evolution had stopped working on basis of survival?
In other words, what will be the purpose of future humans when survival is no longer the purpose? And if the purpose becomes to get as much happiness from life, then what might bring us this happiness and with what mechanism? | 2019/07/04 | [
"https://worldbuilding.stackexchange.com/questions/150218",
"https://worldbuilding.stackexchange.com",
"https://worldbuilding.stackexchange.com/users/65058/"
] | Evolution will be **guided by design** rather than natural selection. Even today, we are able to change the genes of children before they are born and (possibly) [give them higher intelligence](https://sciencebusiness.net/news/eu-and-national-funders-launch-plan-free-and-immediate-open-access-journals). It is generally believed that in the future, "designer babies" will be increasingly common, with parents adding and removing genes to get the desired traits. Genes from other species could be added if desired, or the body might be changed to [produce longevity drugs](https://bioviva-science.com/blog/first-gene-therapy-successful-against-human-aging/).
Further research will likely provide ways to design genetic changes to provide specific desired traits that can't be found in any natural humans or animals. It is important to note that it is believed that genetic changes created through *in utero* (pre-birth) gene therapy will be passed on to offspring, so the entire human race (or subgroups thereof) could be evolved in this way.
[](https://i.stack.imgur.com/L104E.jpg) | [](https://i.stack.imgur.com/T2GGA.jpg)
Now you can't tell me that does anything for his survival. What's worse is the lifespan of creatures like elephant seals, the trauma from the battles between males on the beach significantly reducing their lifespans relative to the females.
In fact survival isn't that strong a driver of evolution except by correlation, the factors that we deem to be attractive are often those associated with strength, health and reproductive ability. The secondary factor being that those who live longer are likely to reproduce more often and hence have more descendants, but that's no longer strictly true anyway.
So we end up peacocks, the driving factor is [sexual selection](https://darwin200.christs.cam.ac.uk/node/77). |
150,218 | Let's imagine a post-scarcity society where everyone has unlimited access to food, energy and the aging problem has been solved so people are practically immortal.
Now my understanding is that, our brains have evolved in a way that maximizes our survival so our brains reward us for doing things that increases our survival chance (like eating, mating, seeking power and status to increase our security..etc) and discourage us from doing things that would decrease our survival chances. This is mainly done by secreting hormones like Dopamine, Oxytocin and Serotonin which make us want to repeat the beneficial action.
In my post-scarcity scenario, our survival will not be at risk since everyone is getting all the basic needs to stay alive and all the medical requirements to prevent death. Now, many many generations after us (millions of years), what will be those things that will make us feel happy or sad when evolution had stopped working on basis of survival?
In other words, what will be the purpose of future humans when survival is no longer the purpose? And if the purpose becomes to get as much happiness from life, then what might bring us this happiness and with what mechanism? | 2019/07/04 | [
"https://worldbuilding.stackexchange.com/questions/150218",
"https://worldbuilding.stackexchange.com",
"https://worldbuilding.stackexchange.com/users/65058/"
] | [](https://i.stack.imgur.com/T2GGA.jpg)
Now you can't tell me that does anything for his survival. What's worse is the lifespan of creatures like elephant seals, the trauma from the battles between males on the beach significantly reducing their lifespans relative to the females.
In fact survival isn't that strong a driver of evolution except by correlation, the factors that we deem to be attractive are often those associated with strength, health and reproductive ability. The secondary factor being that those who live longer are likely to reproduce more often and hence have more descendants, but that's no longer strictly true anyway.
So we end up peacocks, the driving factor is [sexual selection](https://darwin200.christs.cam.ac.uk/node/77). | **We'll get more religious**
The thing that seems likely in a post-scarcity society, given current demographic trends, is that many people will stop having children altogether. With all the entertainment and birth-control options available, life will be distracting enough for most people to stay self-focused and less interested in reproducing.
As Brythan pointed out, those who reproduce win at evolution over those who choose not to. It is commonly members of certain religious groups (of which I am one), who have more than the average number of children.
Liking sex won't be good enough, though (particularly if you're okay with birth control or abortion). The technology to indulge in any kind of fantasy is coming, and would surely only increase if there was nothing else that it was really necessary for people to pursue. So the groups which would be favored by natural selection are those who would have some intrinsic reason to reject the more 'sterilizing' allures - "Why NOT live in this video game, and fall in love with this other player, as a character and not as a real person - or even fall in love with that NPC?"
At the same time, even in a post-scarcity society, people will fear exponential population growth. The argument that we'll soon face collapse because more mouths means not enough for everyone has been floated since Thomas Malthus, at least, and we've had new prophecies of doom by overpopulation every few decades since then. Those will be willing to have several children must also not be the kind of people who are influenced by Population Bomb type arguments.
And lastly, it's not enough to be an eccentric who chooses go your own way - because if you're not spending time with other people in a community, you're less likely to find someone and pair off. So a communalistic tendency is also necessary.
The religious or religious-like, who value families and reject total electronic indulgence, will tend to be selected for. |
150,218 | Let's imagine a post-scarcity society where everyone has unlimited access to food, energy and the aging problem has been solved so people are practically immortal.
Now my understanding is that, our brains have evolved in a way that maximizes our survival so our brains reward us for doing things that increases our survival chance (like eating, mating, seeking power and status to increase our security..etc) and discourage us from doing things that would decrease our survival chances. This is mainly done by secreting hormones like Dopamine, Oxytocin and Serotonin which make us want to repeat the beneficial action.
In my post-scarcity scenario, our survival will not be at risk since everyone is getting all the basic needs to stay alive and all the medical requirements to prevent death. Now, many many generations after us (millions of years), what will be those things that will make us feel happy or sad when evolution had stopped working on basis of survival?
In other words, what will be the purpose of future humans when survival is no longer the purpose? And if the purpose becomes to get as much happiness from life, then what might bring us this happiness and with what mechanism? | 2019/07/04 | [
"https://worldbuilding.stackexchange.com/questions/150218",
"https://worldbuilding.stackexchange.com",
"https://worldbuilding.stackexchange.com/users/65058/"
] | Evolution will be **guided by design** rather than natural selection. Even today, we are able to change the genes of children before they are born and (possibly) [give them higher intelligence](https://sciencebusiness.net/news/eu-and-national-funders-launch-plan-free-and-immediate-open-access-journals). It is generally believed that in the future, "designer babies" will be increasingly common, with parents adding and removing genes to get the desired traits. Genes from other species could be added if desired, or the body might be changed to [produce longevity drugs](https://bioviva-science.com/blog/first-gene-therapy-successful-against-human-aging/).
Further research will likely provide ways to design genetic changes to provide specific desired traits that can't be found in any natural humans or animals. It is important to note that it is believed that genetic changes created through *in utero* (pre-birth) gene therapy will be passed on to offspring, so the entire human race (or subgroups thereof) could be evolved in this way.
[](https://i.stack.imgur.com/L104E.jpg) | Natural selection does not care about purpose or happiness. The only thing that matters for natural selection is propagation of genes. Someone who is miserable but has lots of kids is a natural selection star.
Some things natural selection might select towards:
1. Not liking condoms. Whether it's due to laziness or comfort, someone who does not use a condom is good from a natural selection standpoint.
2. Not being able to use other forms of birth control. If someone is allergic to the pill or has trouble keeping a diaphragm placed, that is a natural selection good.
3. Liking sex.
4. Liking kids.
5. Willingness to abandon kids. If someone is willing to have a child and then abandon the child, that might be even more valuable than liking kids.
6. Inability to find satisfaction in activities other than sex. Someone who only finds moments of satisfaction in sex is more likely to engage in more sex than someone who has other hobbies.
7. Sexual attractiveness. People who are more in demand as sexual partners will be more successful in propagating their genes.
Even in a post-scarcity society, some things are still scarce. For example, apartments in New York City are scarce even though apartments in the United States are not. Some of that is artificial scarcity caused by zoning regulations, etc. But a great deal of that is simply that there is only so much space in New York City.
More importantly from a natural selection standpoint, a person's time is scarce. Children make time scarcer. Parents have to be more careful about organizing their time, because children take up so much of it. As society advances, there are more things to do with that time. Those other things distract from parenting. So people who don't like other activities are more likely to propagate their genes.
Notice the side effect here. People will become more miserable in every activity but sex (and possibly parenting). And sex is likely to be only a transient pleasure. It makes someone happy at that moment, but then it fades, leaving the person craving the next moment of happiness.
Parenting in a post-scarcity society might be done by robots, leaving the humans only pursuing sex. Artificial wombs may mean that pregnancy doesn't even limit sex. As soon as a prospective mother realizes that she's pregnant, she transfers the fetus to an artificial womb and continues her normal activities. A race of sex addicts. |
150,218 | Let's imagine a post-scarcity society where everyone has unlimited access to food, energy and the aging problem has been solved so people are practically immortal.
Now my understanding is that, our brains have evolved in a way that maximizes our survival so our brains reward us for doing things that increases our survival chance (like eating, mating, seeking power and status to increase our security..etc) and discourage us from doing things that would decrease our survival chances. This is mainly done by secreting hormones like Dopamine, Oxytocin and Serotonin which make us want to repeat the beneficial action.
In my post-scarcity scenario, our survival will not be at risk since everyone is getting all the basic needs to stay alive and all the medical requirements to prevent death. Now, many many generations after us (millions of years), what will be those things that will make us feel happy or sad when evolution had stopped working on basis of survival?
In other words, what will be the purpose of future humans when survival is no longer the purpose? And if the purpose becomes to get as much happiness from life, then what might bring us this happiness and with what mechanism? | 2019/07/04 | [
"https://worldbuilding.stackexchange.com/questions/150218",
"https://worldbuilding.stackexchange.com",
"https://worldbuilding.stackexchange.com/users/65058/"
] | Natural selection does not care about purpose or happiness. The only thing that matters for natural selection is propagation of genes. Someone who is miserable but has lots of kids is a natural selection star.
Some things natural selection might select towards:
1. Not liking condoms. Whether it's due to laziness or comfort, someone who does not use a condom is good from a natural selection standpoint.
2. Not being able to use other forms of birth control. If someone is allergic to the pill or has trouble keeping a diaphragm placed, that is a natural selection good.
3. Liking sex.
4. Liking kids.
5. Willingness to abandon kids. If someone is willing to have a child and then abandon the child, that might be even more valuable than liking kids.
6. Inability to find satisfaction in activities other than sex. Someone who only finds moments of satisfaction in sex is more likely to engage in more sex than someone who has other hobbies.
7. Sexual attractiveness. People who are more in demand as sexual partners will be more successful in propagating their genes.
Even in a post-scarcity society, some things are still scarce. For example, apartments in New York City are scarce even though apartments in the United States are not. Some of that is artificial scarcity caused by zoning regulations, etc. But a great deal of that is simply that there is only so much space in New York City.
More importantly from a natural selection standpoint, a person's time is scarce. Children make time scarcer. Parents have to be more careful about organizing their time, because children take up so much of it. As society advances, there are more things to do with that time. Those other things distract from parenting. So people who don't like other activities are more likely to propagate their genes.
Notice the side effect here. People will become more miserable in every activity but sex (and possibly parenting). And sex is likely to be only a transient pleasure. It makes someone happy at that moment, but then it fades, leaving the person craving the next moment of happiness.
Parenting in a post-scarcity society might be done by robots, leaving the humans only pursuing sex. Artificial wombs may mean that pregnancy doesn't even limit sex. As soon as a prospective mother realizes that she's pregnant, she transfers the fetus to an artificial womb and continues her normal activities. A race of sex addicts. | **We'll get more religious**
The thing that seems likely in a post-scarcity society, given current demographic trends, is that many people will stop having children altogether. With all the entertainment and birth-control options available, life will be distracting enough for most people to stay self-focused and less interested in reproducing.
As Brythan pointed out, those who reproduce win at evolution over those who choose not to. It is commonly members of certain religious groups (of which I am one), who have more than the average number of children.
Liking sex won't be good enough, though (particularly if you're okay with birth control or abortion). The technology to indulge in any kind of fantasy is coming, and would surely only increase if there was nothing else that it was really necessary for people to pursue. So the groups which would be favored by natural selection are those who would have some intrinsic reason to reject the more 'sterilizing' allures - "Why NOT live in this video game, and fall in love with this other player, as a character and not as a real person - or even fall in love with that NPC?"
At the same time, even in a post-scarcity society, people will fear exponential population growth. The argument that we'll soon face collapse because more mouths means not enough for everyone has been floated since Thomas Malthus, at least, and we've had new prophecies of doom by overpopulation every few decades since then. Those will be willing to have several children must also not be the kind of people who are influenced by Population Bomb type arguments.
And lastly, it's not enough to be an eccentric who chooses go your own way - because if you're not spending time with other people in a community, you're less likely to find someone and pair off. So a communalistic tendency is also necessary.
The religious or religious-like, who value families and reject total electronic indulgence, will tend to be selected for. |
150,218 | Let's imagine a post-scarcity society where everyone has unlimited access to food, energy and the aging problem has been solved so people are practically immortal.
Now my understanding is that, our brains have evolved in a way that maximizes our survival so our brains reward us for doing things that increases our survival chance (like eating, mating, seeking power and status to increase our security..etc) and discourage us from doing things that would decrease our survival chances. This is mainly done by secreting hormones like Dopamine, Oxytocin and Serotonin which make us want to repeat the beneficial action.
In my post-scarcity scenario, our survival will not be at risk since everyone is getting all the basic needs to stay alive and all the medical requirements to prevent death. Now, many many generations after us (millions of years), what will be those things that will make us feel happy or sad when evolution had stopped working on basis of survival?
In other words, what will be the purpose of future humans when survival is no longer the purpose? And if the purpose becomes to get as much happiness from life, then what might bring us this happiness and with what mechanism? | 2019/07/04 | [
"https://worldbuilding.stackexchange.com/questions/150218",
"https://worldbuilding.stackexchange.com",
"https://worldbuilding.stackexchange.com/users/65058/"
] | Evolution will be **guided by design** rather than natural selection. Even today, we are able to change the genes of children before they are born and (possibly) [give them higher intelligence](https://sciencebusiness.net/news/eu-and-national-funders-launch-plan-free-and-immediate-open-access-journals). It is generally believed that in the future, "designer babies" will be increasingly common, with parents adding and removing genes to get the desired traits. Genes from other species could be added if desired, or the body might be changed to [produce longevity drugs](https://bioviva-science.com/blog/first-gene-therapy-successful-against-human-aging/).
Further research will likely provide ways to design genetic changes to provide specific desired traits that can't be found in any natural humans or animals. It is important to note that it is believed that genetic changes created through *in utero* (pre-birth) gene therapy will be passed on to offspring, so the entire human race (or subgroups thereof) could be evolved in this way.
[](https://i.stack.imgur.com/L104E.jpg) | **We'll get more religious**
The thing that seems likely in a post-scarcity society, given current demographic trends, is that many people will stop having children altogether. With all the entertainment and birth-control options available, life will be distracting enough for most people to stay self-focused and less interested in reproducing.
As Brythan pointed out, those who reproduce win at evolution over those who choose not to. It is commonly members of certain religious groups (of which I am one), who have more than the average number of children.
Liking sex won't be good enough, though (particularly if you're okay with birth control or abortion). The technology to indulge in any kind of fantasy is coming, and would surely only increase if there was nothing else that it was really necessary for people to pursue. So the groups which would be favored by natural selection are those who would have some intrinsic reason to reject the more 'sterilizing' allures - "Why NOT live in this video game, and fall in love with this other player, as a character and not as a real person - or even fall in love with that NPC?"
At the same time, even in a post-scarcity society, people will fear exponential population growth. The argument that we'll soon face collapse because more mouths means not enough for everyone has been floated since Thomas Malthus, at least, and we've had new prophecies of doom by overpopulation every few decades since then. Those will be willing to have several children must also not be the kind of people who are influenced by Population Bomb type arguments.
And lastly, it's not enough to be an eccentric who chooses go your own way - because if you're not spending time with other people in a community, you're less likely to find someone and pair off. So a communalistic tendency is also necessary.
The religious or religious-like, who value families and reject total electronic indulgence, will tend to be selected for. |
65,609 | I feel kind of embarrassed here, I've always used the terms "column" and "field" completely interchangeably, which recently caused some confusion in a technical discussion.
I was told, though, that this wasn't correct, that it should be (translating each term into spreadsheet terminology, ignoring data types and all the other stuff that make databases useful):
* Database Column: like a spreadsheet column
* Database Record: like a spreadsheet row
* Database Field: like a spreadsheet "cell" (a specific column of a specific row)
Is this right? I could have sworn that column and field are used more interchangeably than that. I certainly have been.
So we *don't* add *fields* to a table, we add *columns* to a table, and fields are only relevant when talking about data within a record?
Other thoughts on column vs field?
Edit: to clarify, the current context is MS SQL Server. My background before SQL server was MS Access, which might influence my use of these terms. | 2014/05/21 | [
"https://dba.stackexchange.com/questions/65609",
"https://dba.stackexchange.com",
"https://dba.stackexchange.com/users/157/"
] | Relational database theory does not include the use of the word Field. Dr. E.F. Codd, who wrote the series of papers that provide the theoretical basis for RDBMS's never used the term. You can read his seminal 1970 paper [A Relational Model of Data for Large Shared Data Banks](http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CCsQFjAA&url=http://www.seas.upenn.edu/~zives/03f/cis550/codd.pdf&ei=SyR-U-yjI5W3yATQ2oKQDg&usg=AFQjCNES--xZeFuRGvhpNDQpvFT1axUIXg&sig2=wZDwqIiAY-BRy6XsQ3ruow&bvm=bv.67229260,d.aWw&cad=rja) if you want to check.
Terms like Domain, Table, Attribute, Key and Tuple are used. One reason for this, is that his papers were largely concerned with relational algebra, and the way a particular implementation would define a table in a database wasn't considered by Codd to be important. Vendors would flesh that out later. People also have to understand that historically, RDBMS's evolved from existing hierarchical and network databases that predate them, AND the inner workings of an RDMBS still have to be concerned with data organization and storage.
In common use, and you can easily verify this by simply doing a bit of googling, Fields and columns ***are*** the same thing.
PC Databases like DBase, Access and Filemaker typically use "field" instead of "column". "Attribute" is another term that can be used interchangeably.
For example, here's a link to the MS Access manual on adding a "[field](http://office.microsoft.com/en-us/access-help/add-a-field-to-a-table-HA010072883.aspx)" to a table. It's clear to see that in MS Access a "field" is equivalent to a "column".
The same holds for Dbase and Filemaker Pro.
Sometimes people will refer to a specific value in a specific row as being a "field" or more properly a "field value" but that does not make the use of "field" when referring to a column or column-equivalent-concept incorrect. This does tend to cause a level of confusion because people have used "field" to mean different things for many years. In relational theory -- a single atomic value is referred to as a "Datum".
If someone stated that a "field" is one value in a relational database and not the same as a column, that is their opinion, since "field" is not part of relational database vernacular. They are neither right nor wrong, however, throughout the database world, field is more often used to mean column.
With that said, projects and teams often have to work out an understanding of how they want to use particular terminology within the project to avoid confusion.
You aren't wrong, but you also might decide to simply go along with the convention being used, or avoid using the word field altogether in favor of "column". With relational databases, "Table" and "Column" are the building blocks that exist in DDL and it's best to just use those terms and avoid "field" which isn't used, nor clearly defined. | And how many angels can dance around the head of a pin?
The person who corrected you could themselves be corrected.
* Table = Relation
* Row = Tuple
* Column = Attribute
* Domain = Data Type
See the Wikipedia entry on relational databases [here](http://en.wikipedia.org/wiki/Relational_database).
I worked for an airline and the word "flight" could be used in three different ways depending on whether you were talking to pilots/flight-attendants, engineers or marketing.
* pilots/attendants: a "flight" was out and back from base (i.e. two take-offs and two landings),
* engineers: one take-off and one landing, could be test, repair, training (i.e. one airport back to the same airport) or a "leg", i.e. one airport to another - what "civilians" would normally call a flight, as in "I'm catching my flight home tomorrow"),
* marketing: a six month (typically on-season or off-season) series of "flights" from/to a given airport in the context of a contract.
The spreadsheet analogy is more than good enough for 99.99% of cases, even in reasonably technical speech (unless one is a professor of relational algebra). Does the person who corrected you use the word "whom" correctly? 99.99% of people don't and it really doesn't matter. |
65,609 | I feel kind of embarrassed here, I've always used the terms "column" and "field" completely interchangeably, which recently caused some confusion in a technical discussion.
I was told, though, that this wasn't correct, that it should be (translating each term into spreadsheet terminology, ignoring data types and all the other stuff that make databases useful):
* Database Column: like a spreadsheet column
* Database Record: like a spreadsheet row
* Database Field: like a spreadsheet "cell" (a specific column of a specific row)
Is this right? I could have sworn that column and field are used more interchangeably than that. I certainly have been.
So we *don't* add *fields* to a table, we add *columns* to a table, and fields are only relevant when talking about data within a record?
Other thoughts on column vs field?
Edit: to clarify, the current context is MS SQL Server. My background before SQL server was MS Access, which might influence my use of these terms. | 2014/05/21 | [
"https://dba.stackexchange.com/questions/65609",
"https://dba.stackexchange.com",
"https://dba.stackexchange.com/users/157/"
] | Relational database theory does not include the use of the word Field. Dr. E.F. Codd, who wrote the series of papers that provide the theoretical basis for RDBMS's never used the term. You can read his seminal 1970 paper [A Relational Model of Data for Large Shared Data Banks](http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CCsQFjAA&url=http://www.seas.upenn.edu/~zives/03f/cis550/codd.pdf&ei=SyR-U-yjI5W3yATQ2oKQDg&usg=AFQjCNES--xZeFuRGvhpNDQpvFT1axUIXg&sig2=wZDwqIiAY-BRy6XsQ3ruow&bvm=bv.67229260,d.aWw&cad=rja) if you want to check.
Terms like Domain, Table, Attribute, Key and Tuple are used. One reason for this, is that his papers were largely concerned with relational algebra, and the way a particular implementation would define a table in a database wasn't considered by Codd to be important. Vendors would flesh that out later. People also have to understand that historically, RDBMS's evolved from existing hierarchical and network databases that predate them, AND the inner workings of an RDMBS still have to be concerned with data organization and storage.
In common use, and you can easily verify this by simply doing a bit of googling, Fields and columns ***are*** the same thing.
PC Databases like DBase, Access and Filemaker typically use "field" instead of "column". "Attribute" is another term that can be used interchangeably.
For example, here's a link to the MS Access manual on adding a "[field](http://office.microsoft.com/en-us/access-help/add-a-field-to-a-table-HA010072883.aspx)" to a table. It's clear to see that in MS Access a "field" is equivalent to a "column".
The same holds for Dbase and Filemaker Pro.
Sometimes people will refer to a specific value in a specific row as being a "field" or more properly a "field value" but that does not make the use of "field" when referring to a column or column-equivalent-concept incorrect. This does tend to cause a level of confusion because people have used "field" to mean different things for many years. In relational theory -- a single atomic value is referred to as a "Datum".
If someone stated that a "field" is one value in a relational database and not the same as a column, that is their opinion, since "field" is not part of relational database vernacular. They are neither right nor wrong, however, throughout the database world, field is more often used to mean column.
With that said, projects and teams often have to work out an understanding of how they want to use particular terminology within the project to avoid confusion.
You aren't wrong, but you also might decide to simply go along with the convention being used, or avoid using the word field altogether in favor of "column". With relational databases, "Table" and "Column" are the building blocks that exist in DDL and it's best to just use those terms and avoid "field" which isn't used, nor clearly defined. | I generally use "field" and "column" interchangeably, more recently tending towards "column". I have not heard the term "field" alone to indicate "data" though. I've also not heard the term "attribute" to indicate "field" or "column". A Column/Field *has* attributes, accessible via the FieldInfo Class for instance.
I believe "column" is simply an evolution of the terminology. Desktop DBs (xBASE, MSAccess) generally use "field". [M204](http://m204wiki.rocketsoftware.com/index.php/Field_design) uses "field". This "field" terminology was carried into MSOffice xml and others. The docs for Oracle (it won't let me post any more links, sorry) and MSSQL use "field" and "column" interchangeably throughout. Sybase (now a SAP company) predominantly uses "column" but sometimes "field" in its documentation.
As long as your workgroup agrees on a term, it doesn't matter which one. It's a "rose by any other name" syndrome. |
65,609 | I feel kind of embarrassed here, I've always used the terms "column" and "field" completely interchangeably, which recently caused some confusion in a technical discussion.
I was told, though, that this wasn't correct, that it should be (translating each term into spreadsheet terminology, ignoring data types and all the other stuff that make databases useful):
* Database Column: like a spreadsheet column
* Database Record: like a spreadsheet row
* Database Field: like a spreadsheet "cell" (a specific column of a specific row)
Is this right? I could have sworn that column and field are used more interchangeably than that. I certainly have been.
So we *don't* add *fields* to a table, we add *columns* to a table, and fields are only relevant when talking about data within a record?
Other thoughts on column vs field?
Edit: to clarify, the current context is MS SQL Server. My background before SQL server was MS Access, which might influence my use of these terms. | 2014/05/21 | [
"https://dba.stackexchange.com/questions/65609",
"https://dba.stackexchange.com",
"https://dba.stackexchange.com/users/157/"
] | Relational database theory does not include the use of the word Field. Dr. E.F. Codd, who wrote the series of papers that provide the theoretical basis for RDBMS's never used the term. You can read his seminal 1970 paper [A Relational Model of Data for Large Shared Data Banks](http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CCsQFjAA&url=http://www.seas.upenn.edu/~zives/03f/cis550/codd.pdf&ei=SyR-U-yjI5W3yATQ2oKQDg&usg=AFQjCNES--xZeFuRGvhpNDQpvFT1axUIXg&sig2=wZDwqIiAY-BRy6XsQ3ruow&bvm=bv.67229260,d.aWw&cad=rja) if you want to check.
Terms like Domain, Table, Attribute, Key and Tuple are used. One reason for this, is that his papers were largely concerned with relational algebra, and the way a particular implementation would define a table in a database wasn't considered by Codd to be important. Vendors would flesh that out later. People also have to understand that historically, RDBMS's evolved from existing hierarchical and network databases that predate them, AND the inner workings of an RDMBS still have to be concerned with data organization and storage.
In common use, and you can easily verify this by simply doing a bit of googling, Fields and columns ***are*** the same thing.
PC Databases like DBase, Access and Filemaker typically use "field" instead of "column". "Attribute" is another term that can be used interchangeably.
For example, here's a link to the MS Access manual on adding a "[field](http://office.microsoft.com/en-us/access-help/add-a-field-to-a-table-HA010072883.aspx)" to a table. It's clear to see that in MS Access a "field" is equivalent to a "column".
The same holds for Dbase and Filemaker Pro.
Sometimes people will refer to a specific value in a specific row as being a "field" or more properly a "field value" but that does not make the use of "field" when referring to a column or column-equivalent-concept incorrect. This does tend to cause a level of confusion because people have used "field" to mean different things for many years. In relational theory -- a single atomic value is referred to as a "Datum".
If someone stated that a "field" is one value in a relational database and not the same as a column, that is their opinion, since "field" is not part of relational database vernacular. They are neither right nor wrong, however, throughout the database world, field is more often used to mean column.
With that said, projects and teams often have to work out an understanding of how they want to use particular terminology within the project to avoid confusion.
You aren't wrong, but you also might decide to simply go along with the convention being used, or avoid using the word field altogether in favor of "column". With relational databases, "Table" and "Column" are the building blocks that exist in DDL and it's best to just use those terms and avoid "field" which isn't used, nor clearly defined. | So I realize this is an old question but it is one I hear often. My take on it comes from the involvement our data team has with our development team. Developers definitely have fields within records that are shown on screens and those fields contain data that can frequently be mapped to columns with specific rows. However, in many cases the relational method used to access the data can alter what ends up on a particular screen in a particular field.
I record is a representation of the current value the data delivers. As time goes by those values may and probably will change so the record changes too. The data to support what it is now and what it was at a given time can easily be stored in a set of tables. The relationships between the data determine the meanings that make up the record at any given time.
The logic that derives the fields is something that can change over time. For example, an employee gets hired as Susan Jones and she was hired on 12/01/2010 as a sales clerk in store #101 who reports to Bill Anderson as store manager. This being a progressive company they also have a mentor assigned to each employee. Susan's mentor is Mary Phillips. Mary Phillips is a store manager but she is also a regional manager for the store Susan works in. On 11/10/2011 Susan was promoted to store manager. We do not know what happened to Bill but Susan now is the store manager.
We have a table of employees with name, number, hire date, position, and location.
We have a table of mentor with employee numbers for the mentors and the employee they are mentoring plus dates describing the beginning and end of the mentor relationship.
We have a table of regions with a name for the region and an assigned manager number.
We have another table of locations with address, description, region and manager number.
I screen that displays store information might have a field for store manager. The value for store manager is not a database field but it is a computable value that can change over time. Also a person's manager can change. The data that supports it is still stored in columns but the relationships between the columns has changed and when assembled for a specific purpose the becomes a field. |
65,609 | I feel kind of embarrassed here, I've always used the terms "column" and "field" completely interchangeably, which recently caused some confusion in a technical discussion.
I was told, though, that this wasn't correct, that it should be (translating each term into spreadsheet terminology, ignoring data types and all the other stuff that make databases useful):
* Database Column: like a spreadsheet column
* Database Record: like a spreadsheet row
* Database Field: like a spreadsheet "cell" (a specific column of a specific row)
Is this right? I could have sworn that column and field are used more interchangeably than that. I certainly have been.
So we *don't* add *fields* to a table, we add *columns* to a table, and fields are only relevant when talking about data within a record?
Other thoughts on column vs field?
Edit: to clarify, the current context is MS SQL Server. My background before SQL server was MS Access, which might influence my use of these terms. | 2014/05/21 | [
"https://dba.stackexchange.com/questions/65609",
"https://dba.stackexchange.com",
"https://dba.stackexchange.com/users/157/"
] | And how many angels can dance around the head of a pin?
The person who corrected you could themselves be corrected.
* Table = Relation
* Row = Tuple
* Column = Attribute
* Domain = Data Type
See the Wikipedia entry on relational databases [here](http://en.wikipedia.org/wiki/Relational_database).
I worked for an airline and the word "flight" could be used in three different ways depending on whether you were talking to pilots/flight-attendants, engineers or marketing.
* pilots/attendants: a "flight" was out and back from base (i.e. two take-offs and two landings),
* engineers: one take-off and one landing, could be test, repair, training (i.e. one airport back to the same airport) or a "leg", i.e. one airport to another - what "civilians" would normally call a flight, as in "I'm catching my flight home tomorrow"),
* marketing: a six month (typically on-season or off-season) series of "flights" from/to a given airport in the context of a contract.
The spreadsheet analogy is more than good enough for 99.99% of cases, even in reasonably technical speech (unless one is a professor of relational algebra). Does the person who corrected you use the word "whom" correctly? 99.99% of people don't and it really doesn't matter. | I generally use "field" and "column" interchangeably, more recently tending towards "column". I have not heard the term "field" alone to indicate "data" though. I've also not heard the term "attribute" to indicate "field" or "column". A Column/Field *has* attributes, accessible via the FieldInfo Class for instance.
I believe "column" is simply an evolution of the terminology. Desktop DBs (xBASE, MSAccess) generally use "field". [M204](http://m204wiki.rocketsoftware.com/index.php/Field_design) uses "field". This "field" terminology was carried into MSOffice xml and others. The docs for Oracle (it won't let me post any more links, sorry) and MSSQL use "field" and "column" interchangeably throughout. Sybase (now a SAP company) predominantly uses "column" but sometimes "field" in its documentation.
As long as your workgroup agrees on a term, it doesn't matter which one. It's a "rose by any other name" syndrome. |
65,609 | I feel kind of embarrassed here, I've always used the terms "column" and "field" completely interchangeably, which recently caused some confusion in a technical discussion.
I was told, though, that this wasn't correct, that it should be (translating each term into spreadsheet terminology, ignoring data types and all the other stuff that make databases useful):
* Database Column: like a spreadsheet column
* Database Record: like a spreadsheet row
* Database Field: like a spreadsheet "cell" (a specific column of a specific row)
Is this right? I could have sworn that column and field are used more interchangeably than that. I certainly have been.
So we *don't* add *fields* to a table, we add *columns* to a table, and fields are only relevant when talking about data within a record?
Other thoughts on column vs field?
Edit: to clarify, the current context is MS SQL Server. My background before SQL server was MS Access, which might influence my use of these terms. | 2014/05/21 | [
"https://dba.stackexchange.com/questions/65609",
"https://dba.stackexchange.com",
"https://dba.stackexchange.com/users/157/"
] | And how many angels can dance around the head of a pin?
The person who corrected you could themselves be corrected.
* Table = Relation
* Row = Tuple
* Column = Attribute
* Domain = Data Type
See the Wikipedia entry on relational databases [here](http://en.wikipedia.org/wiki/Relational_database).
I worked for an airline and the word "flight" could be used in three different ways depending on whether you were talking to pilots/flight-attendants, engineers or marketing.
* pilots/attendants: a "flight" was out and back from base (i.e. two take-offs and two landings),
* engineers: one take-off and one landing, could be test, repair, training (i.e. one airport back to the same airport) or a "leg", i.e. one airport to another - what "civilians" would normally call a flight, as in "I'm catching my flight home tomorrow"),
* marketing: a six month (typically on-season or off-season) series of "flights" from/to a given airport in the context of a contract.
The spreadsheet analogy is more than good enough for 99.99% of cases, even in reasonably technical speech (unless one is a professor of relational algebra). Does the person who corrected you use the word "whom" correctly? 99.99% of people don't and it really doesn't matter. | So I realize this is an old question but it is one I hear often. My take on it comes from the involvement our data team has with our development team. Developers definitely have fields within records that are shown on screens and those fields contain data that can frequently be mapped to columns with specific rows. However, in many cases the relational method used to access the data can alter what ends up on a particular screen in a particular field.
I record is a representation of the current value the data delivers. As time goes by those values may and probably will change so the record changes too. The data to support what it is now and what it was at a given time can easily be stored in a set of tables. The relationships between the data determine the meanings that make up the record at any given time.
The logic that derives the fields is something that can change over time. For example, an employee gets hired as Susan Jones and she was hired on 12/01/2010 as a sales clerk in store #101 who reports to Bill Anderson as store manager. This being a progressive company they also have a mentor assigned to each employee. Susan's mentor is Mary Phillips. Mary Phillips is a store manager but she is also a regional manager for the store Susan works in. On 11/10/2011 Susan was promoted to store manager. We do not know what happened to Bill but Susan now is the store manager.
We have a table of employees with name, number, hire date, position, and location.
We have a table of mentor with employee numbers for the mentors and the employee they are mentoring plus dates describing the beginning and end of the mentor relationship.
We have a table of regions with a name for the region and an assigned manager number.
We have another table of locations with address, description, region and manager number.
I screen that displays store information might have a field for store manager. The value for store manager is not a database field but it is a computable value that can change over time. Also a person's manager can change. The data that supports it is still stored in columns but the relationships between the columns has changed and when assembled for a specific purpose the becomes a field. |
88,198 | I have a bad tearing while watching video in Ubuntu 11.10. I tried to use both smplayer and vlc, but none of them helped. In fact I see tearing only in rips, there is not such problem while watching Blu-ray movies. Though maybe i'm just not very attentive. Can anybody help me with this? I have 32-bit version of Ubuntu. Videocard is GTX460 768mb.
I use hardware acceleration in players (vdpau). Enabling vsync in CCSM doesn't help. | 2011/12/16 | [
"https://askubuntu.com/questions/88198",
"https://askubuntu.com",
"https://askubuntu.com/users/37879/"
] | Yes I finally have a solution for you it took a bit of digging, you have to use *CompizConfig Settings Manager*. Go to Utilty > Workarounds, make sure this box is checked:
[](https://i.stack.imgur.com/XQDzW.png)
Also should be checked:
* "Don't wait for video sync"
* "Force full screen redraws"
[](https://i.stack.imgur.com/rNJHA.png)
Also some other this you could do is in the CCSM go to "OpenGL" click on the texture tab put *Best*:
[](https://i.stack.imgur.com/HxN6o.png)
Then go to "Composite" and uncheck "detect rate" then crank up the refresh rate to anything higher than it's default that is set at 50 I set mine to anything beyond 60.
[](https://i.stack.imgur.com/zzSAN.png) problems. Hope this helped. :) | I've found that 'Force full screen redraws (buffer swap) on repaint' works for me. Nvidia version 295.49 in ubuntu 12.04 stills seems a little jerky to me though. |
50,614 | Intersections of the elliptic and the equatorial planes on the celestial sphere are the Vernal Point and the Autumnal Point. Are these two points two antipodes on the celestial sphere of the Earth? | 2022/10/01 | [
"https://astronomy.stackexchange.com/questions/50614",
"https://astronomy.stackexchange.com",
"https://astronomy.stackexchange.com/users/-1/"
] | It's best to think of the vernal point as the intersection of the Earth's equator with the Earth's plane of orbit. Since there are two possible choices, arbitrarily the point where the Sun crosses the equator moving North was chosen as the 0 point.
Since the Earth's poles move, obviously the vernal point will be different depending on where the Earth's pole happens to be pointing.
Now, why would we choose a coordinate system that constantly changes? It's because it makes celestial navigation easier. The vernal point doesn't move that fast, so charts are valid for long periods of time. The "geographic position" of a star can be determined rather simply. The lattitude is the declination. And the longitude is the right ascention minus Greenwhich sidereal time.
Since celestial navigation isn't used much anymore, the IAU has abandoned the "equinox method" and created the International Celestial Reference Frame. It is based on radio sources so distant, they will show no apparent movement at human timescales.
[](https://i.stack.imgur.com/ozMvE.png) | A nice explanation is given by Bob King in Sky&Telescope in the article "Right Ascension & Declination: Celestial Coordinates for Beginners". You can find it at:
<https://skyandtelescope.org/astronomy-resources/right-ascension-declination-celestial-coordinates/>
Kind Regards
Klaus |
244,094 | I want to share AES key using RSA. What is the recommended/widely used format for encrypting the AES key and its attributes with the public key? I know that PKCS#7/CMS enveloped-data allows encrypting any key with its attributes using a certificate. But how can I achieve the same thing without a certificate and only using a public key? | 2021/02/01 | [
"https://security.stackexchange.com/questions/244094",
"https://security.stackexchange.com",
"https://security.stackexchange.com/users/250215/"
] | Generally you'd just use RSA with OAEP padding if you want to encrypt a key. Your question however talks about exchange a key. That could also be performed using RSA-KEM.
Note that RSA was often used with TLS to provide key exchange using the `RSA_` cipher suites. That RSA key was part of a trusted certificate, so it also performed entity authentication. Nowadays we like forward secrecy where the ephemeral key pair is only used once. The disadvantage of RSA for forward secrecy is that the key pair generation can take very long - it depends on how quick the primes are found.
Beware that you need some way to trust the public key or the key exchange and resulting secret. If that trust is not there then you might be encrypting with one provided by an adversary, and confidentiality of the AES key may be lost in a man-in-the-middle attack or a similar attack.
Generally you'd not use CMS / PKCS#7. That is usually used with certificates and it adds a lot of overhead which is usually unnecessary if you just want to encrypt a key value. | You can use OpenSSL rsautil to encrypt the AES key with RSA key. You need to change the RSA key into valid format which OpensSSL can accept. (OpenSSL also supports raw encryption without padding. Use only if you know what you are doing)
To encrypt:
openssl rsautl -encrypt -inkey pubkey.pem -pubin -in aes.key -out AES.enc.key
To decrypt:
openssl rsautl -decrypt -inkey key.pem -in aes.enc.key -out aes.key
You can also check SSH (RFC 4253) working which I think might me helpful. |
33,795 | After the elections (of Donald Trump as US President in 2016) there were many news reports of large-scale, mass protests throughout the US, for example:
<https://www.theguardian.com/us-news/live/2016/nov/09/donald-trump-us-election-2016-live-reactio>
<http://www.reuters.com/article/us-usa-election-protests-idUSKBN1343CO>
<http://www.usatoday.com/story/news/2016/11/09/anti-trump-protests-erupt-new-york-chicago/93570584/>
Many more can be found on Google.
However, I cannot find news records of mass protests after the previous Obama or Bush elections.
Is this just an example of the media playing the news up, or is this actually the first time in recent history that mass protests have been organised against the new president immediately after the election?
--EDIT--
Thank you for the answers and I like the [answer by Timothy](https://history.stackexchange.com/a/33801/3854) about the Abraham Lincoln election (which I will most likely select as the right answer unless there's a better one) but I was hoping to know about such protests happening in recent times (let's say after the 1950s, or if not, after the 1900s, if we need to specify a time frame), for reasons of unpopularity of the winning candidate. I was looking for something other than the [answer given by John](https://history.stackexchange.com/a/33798/3854) because protests against Bush were due to allegations of fraud in the election itself, while the current protests are due to the elected person being who he is. I am looking for similar cases. | 2016/11/10 | [
"https://history.stackexchange.com/questions/33795",
"https://history.stackexchange.com",
"https://history.stackexchange.com/users/3854/"
] | I don't recall hearing about protests after Obama's election, or inauguration.
George W Bush's election took until December 12th to become definite because of the lawsuits over the [Florida voting and recounts](https://en.wikipedia.org/wiki/Florida_election_recount). There were protests over that at his [inauguration](https://en.wikipedia.org/wiki/First_inauguration_of_George_W._Bush). You can find some more documentation easily with Google: [here's an example search](https://www.google.com/?q=protest+bush+inauguration+2001). | Check [Wikipedia: Controversial elections page](https://en.wikipedia.org/wiki/List_of_controversial_elections) |
33,795 | After the elections (of Donald Trump as US President in 2016) there were many news reports of large-scale, mass protests throughout the US, for example:
<https://www.theguardian.com/us-news/live/2016/nov/09/donald-trump-us-election-2016-live-reactio>
<http://www.reuters.com/article/us-usa-election-protests-idUSKBN1343CO>
<http://www.usatoday.com/story/news/2016/11/09/anti-trump-protests-erupt-new-york-chicago/93570584/>
Many more can be found on Google.
However, I cannot find news records of mass protests after the previous Obama or Bush elections.
Is this just an example of the media playing the news up, or is this actually the first time in recent history that mass protests have been organised against the new president immediately after the election?
--EDIT--
Thank you for the answers and I like the [answer by Timothy](https://history.stackexchange.com/a/33801/3854) about the Abraham Lincoln election (which I will most likely select as the right answer unless there's a better one) but I was hoping to know about such protests happening in recent times (let's say after the 1950s, or if not, after the 1900s, if we need to specify a time frame), for reasons of unpopularity of the winning candidate. I was looking for something other than the [answer given by John](https://history.stackexchange.com/a/33798/3854) because protests against Bush were due to allegations of fraud in the election itself, while the current protests are due to the elected person being who he is. I am looking for similar cases. | 2016/11/10 | [
"https://history.stackexchange.com/questions/33795",
"https://history.stackexchange.com",
"https://history.stackexchange.com/users/3854/"
] | You could call this a 'large scale protest'. Following the Presidential election held on 6 November 1860, I assume once the votes were counted and reported by telegraph it was known by 7 or 8 November that Abraham Lincoln had won. The state legislature of South Carolina voted on 9 November to declare Lincoln's election a hostile act and initiated a process by which the state formally seceded from the United States the following month, hence the Confederacy and Civil War. | I don't recall hearing about protests after Obama's election, or inauguration.
George W Bush's election took until December 12th to become definite because of the lawsuits over the [Florida voting and recounts](https://en.wikipedia.org/wiki/Florida_election_recount). There were protests over that at his [inauguration](https://en.wikipedia.org/wiki/First_inauguration_of_George_W._Bush). You can find some more documentation easily with Google: [here's an example search](https://www.google.com/?q=protest+bush+inauguration+2001). |
33,795 | After the elections (of Donald Trump as US President in 2016) there were many news reports of large-scale, mass protests throughout the US, for example:
<https://www.theguardian.com/us-news/live/2016/nov/09/donald-trump-us-election-2016-live-reactio>
<http://www.reuters.com/article/us-usa-election-protests-idUSKBN1343CO>
<http://www.usatoday.com/story/news/2016/11/09/anti-trump-protests-erupt-new-york-chicago/93570584/>
Many more can be found on Google.
However, I cannot find news records of mass protests after the previous Obama or Bush elections.
Is this just an example of the media playing the news up, or is this actually the first time in recent history that mass protests have been organised against the new president immediately after the election?
--EDIT--
Thank you for the answers and I like the [answer by Timothy](https://history.stackexchange.com/a/33801/3854) about the Abraham Lincoln election (which I will most likely select as the right answer unless there's a better one) but I was hoping to know about such protests happening in recent times (let's say after the 1950s, or if not, after the 1900s, if we need to specify a time frame), for reasons of unpopularity of the winning candidate. I was looking for something other than the [answer given by John](https://history.stackexchange.com/a/33798/3854) because protests against Bush were due to allegations of fraud in the election itself, while the current protests are due to the elected person being who he is. I am looking for similar cases. | 2016/11/10 | [
"https://history.stackexchange.com/questions/33795",
"https://history.stackexchange.com",
"https://history.stackexchange.com/users/3854/"
] | You could call this a 'large scale protest'. Following the Presidential election held on 6 November 1860, I assume once the votes were counted and reported by telegraph it was known by 7 or 8 November that Abraham Lincoln had won. The state legislature of South Carolina voted on 9 November to declare Lincoln's election a hostile act and initiated a process by which the state formally seceded from the United States the following month, hence the Confederacy and Civil War. | Check [Wikipedia: Controversial elections page](https://en.wikipedia.org/wiki/List_of_controversial_elections) |
397,795 | I am using btrfs with bcache for / on Ubuntu 13.10. It's fast. Unfortunately, during normal boots the step "Scanning for btrfs filesystems" fails. To successfully boot I have to enter recovery mode and then simply choose the menu option "continue to the main system".
I assume a normal boot fails because the bcache0 device has not finished being created by the time btrfs scans for its filesystems. How can I insert a delay between these steps? | 2013/12/30 | [
"https://askubuntu.com/questions/397795",
"https://askubuntu.com",
"https://askubuntu.com/users/111339/"
] | The ubuntu firewall is actually part of the linux kernel, and is called iptables.
Gufw is just a tool to let you change the firewall settings, but those settings will still be there without it. The command-line tool 'ufw' is also just a way to change your firewall settings.
Removing the gufw package doesn't remove the linux firewall. So uninstalling gufw is not going to change the security of your system one way or the other. Your firewall is still going to be sitting there with whatever rules were last set up - either the defaults or whatever you changed them to be. | Using firewalls is a personal decision based on your usage. I personally think that firewalls aren't necessary for desktops on LANs behind routers that don't have unneeded ports opened. Linux by default does not open any ports that are not required unless a program/service needs them.
If you did not create any firewall rules using the app, removing it via the Software Center should cause no problems. |
2,820,223 | Any suggestions? This SO post talks about [Visual Leak Detector](http://www.codeproject.com/KB/applications/visualleakdetector.aspx), but I'm looking for other tools. Also, please don't recommend [this](http://msdn.microsoft.com/en-us/library/x98tx3cf%28VS.80%29.aspx). | 2010/05/12 | [
"https://Stackoverflow.com/questions/2820223",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/71131/"
] | Try [Deleaker](http://www.deleaker.com/) or [DevPartner](http://www.microfocus.com/products/micro-focus-developer/devpartner/devpartner-studio-professional-edition.aspx), these both are good enough.
update:
[C++ Memory Validator](http://www.softwareverify.com/cpp-memory.php), works fine and fairly priced. | Jacob, the BoundsChecker tool inside DevPartner Studio contains two types of leak detectors for VC++. The uninstrumented version will tabulate leaks at process shutdown. The compile time instrumented detector will break on leaks at the time the leak occurrs showing both the current call stack at the point of leakage, and the allocation stack trace showing where the leaking memory was allocated. The 64-bit version of DPS and BoundsChecker 10.5 ships February 4, 2011 with x64 application support for Visual Studio 2010, 2008, and 2005. We also have a new pricing model so you can license just the BoundsChecker features and ugrade to the full DPS suite only if you find you need the other profilers or static analysis capabilities later on. Be sure to haggle with your sales rep too. Paying list price is like paying sticker price on a new car. Shameless plug: I work on the DevPartner team. DPS 10.5 represents my team's biggest release of tech capability since Compuware closed the NuMega lab. Please evaluate it for your own application and tech stack when 10.5 goes live. Cheers. Matt Schuetze, DevPartner Product Owner (and yes that means PO in normal Scrum team roles.) |
2,820,223 | Any suggestions? This SO post talks about [Visual Leak Detector](http://www.codeproject.com/KB/applications/visualleakdetector.aspx), but I'm looking for other tools. Also, please don't recommend [this](http://msdn.microsoft.com/en-us/library/x98tx3cf%28VS.80%29.aspx). | 2010/05/12 | [
"https://Stackoverflow.com/questions/2820223",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/71131/"
] | If you can afford some money use the Intel Parallel Inspector (<http://software.intel.com/en-us/intel-parallel-inspector>).
It doesn't require any code modifications and provides good reports.
I had to look for good tools to do that in work and that's the best tool (by far) that I found. | Jacob, the BoundsChecker tool inside DevPartner Studio contains two types of leak detectors for VC++. The uninstrumented version will tabulate leaks at process shutdown. The compile time instrumented detector will break on leaks at the time the leak occurrs showing both the current call stack at the point of leakage, and the allocation stack trace showing where the leaking memory was allocated. The 64-bit version of DPS and BoundsChecker 10.5 ships February 4, 2011 with x64 application support for Visual Studio 2010, 2008, and 2005. We also have a new pricing model so you can license just the BoundsChecker features and ugrade to the full DPS suite only if you find you need the other profilers or static analysis capabilities later on. Be sure to haggle with your sales rep too. Paying list price is like paying sticker price on a new car. Shameless plug: I work on the DevPartner team. DPS 10.5 represents my team's biggest release of tech capability since Compuware closed the NuMega lab. Please evaluate it for your own application and tech stack when 10.5 goes live. Cheers. Matt Schuetze, DevPartner Product Owner (and yes that means PO in normal Scrum team roles.) |
2,820,223 | Any suggestions? This SO post talks about [Visual Leak Detector](http://www.codeproject.com/KB/applications/visualleakdetector.aspx), but I'm looking for other tools. Also, please don't recommend [this](http://msdn.microsoft.com/en-us/library/x98tx3cf%28VS.80%29.aspx). | 2010/05/12 | [
"https://Stackoverflow.com/questions/2820223",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/71131/"
] | If you can afford some money use the Intel Parallel Inspector (<http://software.intel.com/en-us/intel-parallel-inspector>).
It doesn't require any code modifications and provides good reports.
I had to look for good tools to do that in work and that's the best tool (by far) that I found. | As suggested by Noah Roberts, i too felt Memory validator as the best tool for detecting leaks in Visual studio.
Purify also works. |
2,820,223 | Any suggestions? This SO post talks about [Visual Leak Detector](http://www.codeproject.com/KB/applications/visualleakdetector.aspx), but I'm looking for other tools. Also, please don't recommend [this](http://msdn.microsoft.com/en-us/library/x98tx3cf%28VS.80%29.aspx). | 2010/05/12 | [
"https://Stackoverflow.com/questions/2820223",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/71131/"
] | Try [Deleaker](http://www.deleaker.com/) or [DevPartner](http://www.microfocus.com/products/micro-focus-developer/devpartner/devpartner-studio-professional-edition.aspx), these both are good enough.
update:
[C++ Memory Validator](http://www.softwareverify.com/cpp-memory.php), works fine and fairly priced. | As suggested by Noah Roberts, i too felt Memory validator as the best tool for detecting leaks in Visual studio.
Purify also works. |
2,820,223 | Any suggestions? This SO post talks about [Visual Leak Detector](http://www.codeproject.com/KB/applications/visualleakdetector.aspx), but I'm looking for other tools. Also, please don't recommend [this](http://msdn.microsoft.com/en-us/library/x98tx3cf%28VS.80%29.aspx). | 2010/05/12 | [
"https://Stackoverflow.com/questions/2820223",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/71131/"
] | If you can afford some money use the Intel Parallel Inspector (<http://software.intel.com/en-us/intel-parallel-inspector>).
It doesn't require any code modifications and provides good reports.
I had to look for good tools to do that in work and that's the best tool (by far) that I found. | Try Dr.Memory.
They have proper visual studio integration and documentation is excellent.
Easy to use too. |
2,820,223 | Any suggestions? This SO post talks about [Visual Leak Detector](http://www.codeproject.com/KB/applications/visualleakdetector.aspx), but I'm looking for other tools. Also, please don't recommend [this](http://msdn.microsoft.com/en-us/library/x98tx3cf%28VS.80%29.aspx). | 2010/05/12 | [
"https://Stackoverflow.com/questions/2820223",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/71131/"
] | I've used [Visual Leak Detector](http://vld.codeplex.com/) quite recently and it works pretty well. It's very simple to build it in (just include `vld.h`) and doesn't require any instrumentation. I found that I needed to write a couple of scripts though to parse the output into something more useful for my purposes (it is crying out for a decent GUI). Note the new website -- the project is being actively maintained on Codeplex -- the Codeproject link is very old. | As suggested by Noah Roberts, i too felt Memory validator as the best tool for detecting leaks in Visual studio.
Purify also works. |
2,820,223 | Any suggestions? This SO post talks about [Visual Leak Detector](http://www.codeproject.com/KB/applications/visualleakdetector.aspx), but I'm looking for other tools. Also, please don't recommend [this](http://msdn.microsoft.com/en-us/library/x98tx3cf%28VS.80%29.aspx). | 2010/05/12 | [
"https://Stackoverflow.com/questions/2820223",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/71131/"
] | Try [Deleaker](http://www.deleaker.com/) or [DevPartner](http://www.microfocus.com/products/micro-focus-developer/devpartner/devpartner-studio-professional-edition.aspx), these both are good enough.
update:
[C++ Memory Validator](http://www.softwareverify.com/cpp-memory.php), works fine and fairly priced. | Try Dr.Memory.
They have proper visual studio integration and documentation is excellent.
Easy to use too. |
2,820,223 | Any suggestions? This SO post talks about [Visual Leak Detector](http://www.codeproject.com/KB/applications/visualleakdetector.aspx), but I'm looking for other tools. Also, please don't recommend [this](http://msdn.microsoft.com/en-us/library/x98tx3cf%28VS.80%29.aspx). | 2010/05/12 | [
"https://Stackoverflow.com/questions/2820223",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/71131/"
] | I've used [Visual Leak Detector](http://vld.codeplex.com/) quite recently and it works pretty well. It's very simple to build it in (just include `vld.h`) and doesn't require any instrumentation. I found that I needed to write a couple of scripts though to parse the output into something more useful for my purposes (it is crying out for a decent GUI). Note the new website -- the project is being actively maintained on Codeplex -- the Codeproject link is very old. | <https://sourceforge.net/projects/diagnostic/>
<http://diagnostic.sourceforge.net/index.html>
I had tried so many memory leak detectors that it's difficult to count them all. Some of them crashed, some of them produced invalid results, some of them simply did not help. Eventually I've made my own leak detector, but invested so much effort into it - so made it non-free for time being. Managed / native / 32 & 64-bit architectures supported.
If you ever want to develop this tool further, please feel free to contact me. |
2,820,223 | Any suggestions? This SO post talks about [Visual Leak Detector](http://www.codeproject.com/KB/applications/visualleakdetector.aspx), but I'm looking for other tools. Also, please don't recommend [this](http://msdn.microsoft.com/en-us/library/x98tx3cf%28VS.80%29.aspx). | 2010/05/12 | [
"https://Stackoverflow.com/questions/2820223",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/71131/"
] | If you can afford some money use the Intel Parallel Inspector (<http://software.intel.com/en-us/intel-parallel-inspector>).
It doesn't require any code modifications and provides good reports.
I had to look for good tools to do that in work and that's the best tool (by far) that I found. | <https://sourceforge.net/projects/diagnostic/>
<http://diagnostic.sourceforge.net/index.html>
I had tried so many memory leak detectors that it's difficult to count them all. Some of them crashed, some of them produced invalid results, some of them simply did not help. Eventually I've made my own leak detector, but invested so much effort into it - so made it non-free for time being. Managed / native / 32 & 64-bit architectures supported.
If you ever want to develop this tool further, please feel free to contact me. |
2,820,223 | Any suggestions? This SO post talks about [Visual Leak Detector](http://www.codeproject.com/KB/applications/visualleakdetector.aspx), but I'm looking for other tools. Also, please don't recommend [this](http://msdn.microsoft.com/en-us/library/x98tx3cf%28VS.80%29.aspx). | 2010/05/12 | [
"https://Stackoverflow.com/questions/2820223",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/71131/"
] | As suggested by Noah Roberts, i too felt Memory validator as the best tool for detecting leaks in Visual studio.
Purify also works. | Jacob, the BoundsChecker tool inside DevPartner Studio contains two types of leak detectors for VC++. The uninstrumented version will tabulate leaks at process shutdown. The compile time instrumented detector will break on leaks at the time the leak occurrs showing both the current call stack at the point of leakage, and the allocation stack trace showing where the leaking memory was allocated. The 64-bit version of DPS and BoundsChecker 10.5 ships February 4, 2011 with x64 application support for Visual Studio 2010, 2008, and 2005. We also have a new pricing model so you can license just the BoundsChecker features and ugrade to the full DPS suite only if you find you need the other profilers or static analysis capabilities later on. Be sure to haggle with your sales rep too. Paying list price is like paying sticker price on a new car. Shameless plug: I work on the DevPartner team. DPS 10.5 represents my team's biggest release of tech capability since Compuware closed the NuMega lab. Please evaluate it for your own application and tech stack when 10.5 goes live. Cheers. Matt Schuetze, DevPartner Product Owner (and yes that means PO in normal Scrum team roles.) |
65,777 | The *Cantrips known* chart for a level 1 cleric states you know 3 cantrips at level 1. The light domain cleric at level one gets the light cantrip if she doesn't already know it.
So, does a light domain cleric get 4 cantrips at level 1? Could I take 3 other cantrips and then be granted Light from my domain? | 2015/08/06 | [
"https://rpg.stackexchange.com/questions/65777",
"https://rpg.stackexchange.com",
"https://rpg.stackexchange.com/users/10263/"
] | Yes, and this and Nature are the only Domains that gets an extra cantrip, so other clerics still have 3 at first level while Light and Nature Domains gets 3 *plus* **Light** / **(Druid cantrip)**.
All the clerics get bonus cantrips as they grow up levels as you can see in the Player's Handbook (PHB) **page 57**, starting at 3 and reaching 5 at level 10th, the Light and Nature clerics will have his extra **Light** / **(Druid cantrip)** cantrips, so they are an exception between clerics. | You are exactly right. All 1st level Clerics get 3 Cantrips known at 1st level, and some of the domains do give you additional Cantrips, as well as other benefits and extending your list of prepared spells.
The Light Domain gives you the Light Cantrip if you don't already have it, so that you now have 4 Cantrips. Some Races and other features also give Cantrips and limited spell-casting capabilities, like the Tiefling giving you the Thaumaturgy Cantrip if you don't already know it. |
29,601,946 | I have a problem with a CDI Event fired from an EJB Timer.
Point is, that the save event can be fired via manual user action (e.g. fired from a CDI SessionScoped bean method). In this case, all registered observers should catch it. But if the the CDI Event fired from the Timer is caught by a SessionScoped bean (which is anyway not required), an exception is thrown that no active Context could be found.
So... how can I tell the CDI eventing mechanism that only ApplicationScoped beans should catch the event, in case it was fired by the EJB Timer ? | 2015/04/13 | [
"https://Stackoverflow.com/questions/29601946",
"https://Stackoverflow.com",
"https://Stackoverflow.com/users/1226049/"
] | I found the solution.
@Observes contains the parameter "notifyObserver". If you set this to Reception.IF\_EXISTS, CDI won't create a SessionScoped bean outside an HTTP Request if there is none.
So the EJB Timer fired event won't be catched by a SessionScoped bean (because it does not exist) and the manually triggered one will be catched as there is an existing instance of the SessionScoped bean. | Use qualifiers as described in this stackoverflow post: [Select certain CDI event observer](https://stackoverflow.com/questions/29453193/select-certain-cdi-event-observer)
(not sure it realy is a duplicate, but I think it is) |
249,154 | I have old-ish laptop that comes with touch screen.
What I wanna do is buy GPS module for it and install basic windows ce on it.
Then use it as gps navigation with igo 8 for ce
Is that possible?
How would I exactly install windows ce to laptops hard drive and make it start igo 8 right away? | 2011/02/22 | [
"https://superuser.com/questions/249154",
"https://superuser.com",
"https://superuser.com/users/68740/"
] | Windows CE is typically an embedded operating system and is not straight forward to get running on other hardware.
Windows CE is not a simple CD you can install from like the regular editions of Windows you can buy from a shop. It is designed to be a highly configurable\*, customisable, very flexible operating system.
It has to be "built" for each target. If you have a MSDN subscription (I forget the level needed), you can download a disk called "Windows Embedded CE 6.0 R3 - DVD (English)" (It is under development tools, I can't quickly see a way to deeplink in). This contains a tool which is called "Platform Builder". I have not run this in many years, but I do not think it has changed.
Using platform builder, you can choose from MANY templates - from a ip phone, set top box, down to full desktop and completely customise many aspects of Windows CE. You will need to target the X86 CPU and most likely will need to find/acquire/build drivers for certain hardware such as the touch screen.
Once built, by default, it installs a trial key which allows the built image to run for a short while (I think 30 or 60 days... but that is off the top of my head). In order to buy a full licence, you need to go to a Windows Embedded Distributor - and for just one unit... you may have a little trouble.
Personally, You may be best off sticking Google Maps (if you have a 3g dongle/internet connection) or Microsoft Autoroute (I think it is) as it has a complete database built in - and is GPS compatible.
As for other aspects, on X86 hardware, it should be quite fast, but do not expect it to be as fast as on dedicated Windows CE devices - many of them are purpose built with flash memory, and BSP (Motherboards that are deeply linked to the OS) for maximum speed.
`*` You would be surprised how many set top boxes, GPSs and other high end electronic goods run it!
Good luck and it sounds interesting, so please let me know what route you end up going down! | I don't think your are (easily) going to be able to install Windows CE on an old laptop.
If you are looking to use your laptop as a GPS navigation system check out the free [GPSDrive](http://www.gpsdrive.de/screenshots/index.shtml) app which runs on Linux, or alternatively Google Maps, at least on Chrome, will update its location continually based on wifi/cell phone towers, making it easy to turn a laptop into a poor man's navigation system.
You can also use free [QGIS](http://www.qgis.org/) application to connect to a GPS on your laptop and show a location continually updated. You could get the maps for free from OpenStreetMap. |
249,154 | I have old-ish laptop that comes with touch screen.
What I wanna do is buy GPS module for it and install basic windows ce on it.
Then use it as gps navigation with igo 8 for ce
Is that possible?
How would I exactly install windows ce to laptops hard drive and make it start igo 8 right away? | 2011/02/22 | [
"https://superuser.com/questions/249154",
"https://superuser.com",
"https://superuser.com/users/68740/"
] | Windows CE is typically an embedded operating system and is not straight forward to get running on other hardware.
Windows CE is not a simple CD you can install from like the regular editions of Windows you can buy from a shop. It is designed to be a highly configurable\*, customisable, very flexible operating system.
It has to be "built" for each target. If you have a MSDN subscription (I forget the level needed), you can download a disk called "Windows Embedded CE 6.0 R3 - DVD (English)" (It is under development tools, I can't quickly see a way to deeplink in). This contains a tool which is called "Platform Builder". I have not run this in many years, but I do not think it has changed.
Using platform builder, you can choose from MANY templates - from a ip phone, set top box, down to full desktop and completely customise many aspects of Windows CE. You will need to target the X86 CPU and most likely will need to find/acquire/build drivers for certain hardware such as the touch screen.
Once built, by default, it installs a trial key which allows the built image to run for a short while (I think 30 or 60 days... but that is off the top of my head). In order to buy a full licence, you need to go to a Windows Embedded Distributor - and for just one unit... you may have a little trouble.
Personally, You may be best off sticking Google Maps (if you have a 3g dongle/internet connection) or Microsoft Autoroute (I think it is) as it has a complete database built in - and is GPS compatible.
As for other aspects, on X86 hardware, it should be quite fast, but do not expect it to be as fast as on dedicated Windows CE devices - many of them are purpose built with flash memory, and BSP (Motherboards that are deeply linked to the OS) for maximum speed.
`*` You would be surprised how many set top boxes, GPSs and other high end electronic goods run it!
Good luck and it sounds interesting, so please let me know what route you end up going down! | Yoiu should look into putting Android on the computer. There is an x86 port of Gingerbread (2.3) being developed.
<http://www.android-x86.org/> |
6,036 | I was listening to one of the recent Q&A Brew Strong podcasts and Palmer offhandedly mentioned leaving the lid of your kettle off while chilling wort to prevent condensate (with DMS in it) from dripping back into your wort.
Does anyone out there actually leave the lid off your pot while chilling? I've always been far more concerned with infection than a little DMS, but I'm considering leaving the top off while chilling my next batch that is heavy in pils malt. | 2012/01/18 | [
"https://homebrew.stackexchange.com/questions/6036",
"https://homebrew.stackexchange.com",
"https://homebrew.stackexchange.com/users/907/"
] | Well in theory you've driven off most of the SMM by the time you start chilling so the issue should be fairly minimal at that point. I usually chill with the lid off, but when I do with the lid on I can't say I've ever noticed a difference or an issue with DMS. I use pilsner quite a bit and I do a 75 minute boil when I use it. | I heard the same podcast (I think it was the BeerSmith homebrewer round table with Gordon Strong and Denny Conn) and was surprised by that comment as well.
Having said that, I've just started chilling with the lid off (my wife got rid of the lid that was big enough to cover the keggle) and haven't noticed any perceptible difference in flavor. Prior to this I was concerned with airborne bacteria, but as long as you are pitching a good healthy portion of yeast (preferably with a starter), I don't think you have much to worry about. |
223,322 | Preloading is a primitive operation. You must preload for a year or more, and "be aware that inclusion in the preload list cannot easily be undone," [according to the registration tool](https://hstspreload.org/). Therefore, if there is ANY chance of an error, it is prudent NOT to preload, at least for awhile. During that time your website is wide open for MiTM attacks by each first request by each visitor (to find the HSTS header).
Is there any simpler solution, one that doesn't have the problems with redirection, http access, and preloading? | 2019/12/27 | [
"https://security.stackexchange.com/questions/223322",
"https://security.stackexchange.com",
"https://security.stackexchange.com/users/161104/"
] | Preloading isn't as dangerous as you're making it sound. The only requirement for it to not break your site is that you have TLS working, and if TLS weren't working, then your site is unsafe anyway. The right answer is "just preload". | Currently, most URL redirection from http to https is done in error-prone ways (depending on the expertise of developers, webmasters, and hosting companies), such as using the Apache Redirect directive and/or rewrite engine. Browsers themselves cannot step in and change the scheme unless they know that HSTS applies.
One solution might be to eliminate HSTS, and instead add a new flag to the DNS zone records, declaring that a domain supports https, and not http.
If an agent or browser sees this flag during its DNS lookup, it would silently rewrite the user's HTTP scheme to HTTPS. This would be guaranteed not to fail, since the authoritative DNS zone declared that it cannot fail.
By gradually eliminating all http requests that can reasonably be eliminated, cleartext negotiations will gradually be eliminated from the Internet, leaving us all increasingly secure and yet supporting old links, small device URLs, edge cases, etc. |
507,326 | What is the use of the differential RC filter at the end of this op amp (at least I'm seeing R100+R98+C28 as that)?
P3\_3V\_REF is a reference voltage for the 4 ADCs in the TMS320F28377D-EP MCU. An [article from LT](https://www.analog.com/en/analog-dialogue/articles/precision-successive-approximation-adcs.html) explains to me the reason for using the buffer after the reference voltage IC when providing a reference voltage to multiple ADCs from a single source. I could understand why you might want an LPF on your reference voltage to cut out any high frequency noise, but I dont see the need for it to be differential. So is there any reason for R98?
Thanks
[](https://i.stack.imgur.com/dqi9P.png) | 2020/06/25 | [
"https://electronics.stackexchange.com/questions/507326",
"https://electronics.stackexchange.com",
"https://electronics.stackexchange.com/users/235097/"
] | **>> , < <> > and <<**: These are called "off-page connectors". >> means that the signal *originates* from this page (it's an output from this page) and goes to another page. The numbers "6,10,11" are the pages that this signal goes to. On those pages you'll find those signals next to the << symbol. This symbol means that that signal originates from a different page and *enters* this page (its an input to this page). <<>> means this signal is a bidirectional signal. The signal can originate from this page or the other page it is present on.
The n in HDMICLK\_DISn typically denotes an active low signal. I dont know about HDMI's specs but from the signal name I assume it has a clock (CLK = clock). Some name + \_dis (HDMICLK\_DIS) typically means that this signal's purpose to to disable some function, in this case the clock signal for HDMI, make this signal high and the clock will be disabled. Now add the "n" to then end (HDMICLK\_DISn) and again it's an active low signal. A high signal on this line will keep the HDMICLK **enabled** but now a low signal (typically GND) will **disable** the HDMICLK | Zero ohm resistors are also used for hardware configuration.
When connected between a GPIOpin and GND with the GPIO pin pulled high by a suitable resistor. 2 x GPIO pins gives 4 different configuration options. (00 01 10 11). |
83,303 | Imagine we're playing a game of mastermind with the usual eight colours, only this version has six holes across in which to place colours. And to make it easier for you I tell you that I have filled all six with the same colour.
**What is the minimum maximum number of turns you require to get the correct answer? How do you do it?** | 2019/04/28 | [
"https://puzzling.stackexchange.com/questions/83303",
"https://puzzling.stackexchange.com",
"https://puzzling.stackexchange.com/users/50579/"
] | >
> Two guesses are enough to find the color, a third guess to give the correct code.
>
>
>
> Name the colors with letter A to H.
>
> Guess 1: AABCDE.
>
> - If you get 2 matches, the color is A.
>
> - If you get 1 match, it is B, C, D or E. Guess 2: CDDEEE. The color is B, C, D or E for respectively 0, 1, 2 or 3 matches.
>
> - If you get 0 match, it is F, G or H. Guess 2: FGGHHH. The color is F, G or H for resp. 1, 2 or 3 matches.
>
> If it is required to complete the game, enter the color everywhere as guess 3.
>
>
>
> It is easy to see that with 2 guesses you can find the correct color among even 9.
>
>
> | >
> Two. Use 1 peg colour 1, 1 pegs colour 2 and 2 pegs colour 3 and 4 for the first guess. If nothing is recorded, you get left with 4 colours, otherwise you are home and dry. With 4 colours, use 1 peg 1, 2 pegs 2, 3 peg 3. The number of records gives the answer (or none for colour 4).
>
>
> |
83,303 | Imagine we're playing a game of mastermind with the usual eight colours, only this version has six holes across in which to place colours. And to make it easier for you I tell you that I have filled all six with the same colour.
**What is the minimum maximum number of turns you require to get the correct answer? How do you do it?** | 2019/04/28 | [
"https://puzzling.stackexchange.com/questions/83303",
"https://puzzling.stackexchange.com",
"https://puzzling.stackexchange.com/users/50579/"
] | >
> Two. Use 1 peg colour 1, 1 pegs colour 2 and 2 pegs colour 3 and 4 for the first guess. If nothing is recorded, you get left with 4 colours, otherwise you are home and dry. With 4 colours, use 1 peg 1, 2 pegs 2, 3 peg 3. The number of records gives the answer (or none for colour 4).
>
>
> | Posted this before reading other answers.
Edit: After reading other posts.
Minimum worst case with best play:
>
> ~~4~~ 3 guesses.
>
>
>
Because:
>
> First turn: use 4 colours, no matter how you do that worst case is no hits and all you know is that it's one of the remaining four.
>
> ~~Second turn: use 2 of the known colours, similarly worst case no hits and all we now know is that it's one of the two remaining colours.~~
>
> ~~Third turn: use 1 of the known colours, worst case no hit and we get it on the next turn.~~
>
> Once we know it's 1 of 4 colours we can put them forward in groups of 3, 2, 1, and none (the colour left out).
>
> So the second turns becomes: 3 of one colour, 2 of another with 1 of a third colour. Whatever the score is we'll know the correct colour for the 3rd turn.
>
>
> |
83,303 | Imagine we're playing a game of mastermind with the usual eight colours, only this version has six holes across in which to place colours. And to make it easier for you I tell you that I have filled all six with the same colour.
**What is the minimum maximum number of turns you require to get the correct answer? How do you do it?** | 2019/04/28 | [
"https://puzzling.stackexchange.com/questions/83303",
"https://puzzling.stackexchange.com",
"https://puzzling.stackexchange.com/users/50579/"
] | >
> Two. Use 1 peg colour 1, 1 pegs colour 2 and 2 pegs colour 3 and 4 for the first guess. If nothing is recorded, you get left with 4 colours, otherwise you are home and dry. With 4 colours, use 1 peg 1, 2 pegs 2, 3 peg 3. The number of records gives the answer (or none for colour 4).
>
>
> | My algorithm will probably be almost the same as the others but I just wanna show another way. So my answer is
>
> Require 3 guesses to guarantee know the colour
>
>
>
My explanation
>
> Label my colours as A, B, C, D, E, F, G and H
> First Guess: ABBCCC. If 0 match, the colour is D, E, F, G or H. If 1 match, the colour A. If 2 matches, the colour is B. If 3 matches, the colour is C.
> If 0 match in the first guess, proceed to second guess.
>
> Second guess: DEEFFF. Same logic as first guess. If 0 match, the colour is either G or H. If 1 match the colour D. If 2 matches, the colour is E. If 3 matches, the colour is F.
> If 0 match in the second guess, proceed to third guess.
>
> Third guess: GGGGGG: If all correct, the colour is G. If all wrong, the colour is H.
>
>
> |
83,303 | Imagine we're playing a game of mastermind with the usual eight colours, only this version has six holes across in which to place colours. And to make it easier for you I tell you that I have filled all six with the same colour.
**What is the minimum maximum number of turns you require to get the correct answer? How do you do it?** | 2019/04/28 | [
"https://puzzling.stackexchange.com/questions/83303",
"https://puzzling.stackexchange.com",
"https://puzzling.stackexchange.com/users/50579/"
] | >
> Two. Use 1 peg colour 1, 1 pegs colour 2 and 2 pegs colour 3 and 4 for the first guess. If nothing is recorded, you get left with 4 colours, otherwise you are home and dry. With 4 colours, use 1 peg 1, 2 pegs 2, 3 peg 3. The number of records gives the answer (or none for colour 4).
>
>
> | Similar to Florian F's answer, but with a better chance to solve quicker.
>
> Guaranteed in 3 guesses with a 25% chance to solve in 2 guesses
>
>
>
>
> On turn 1 guess ABCCDD:
>
>
> - If you get 1 match, it's A or B—2 matches it's C or D. Turns 2 and 3 can be AAAAAA and BBBBBB or CCCCCC and DDDDDD respectively to get the correct answer within at most 3 guesses.
>
>
> - If you get 0 matches on turn 1, guess FGGHHH on turn 2. Guess 3 should be EEEEEE, FFFFFF, GGGGGG, or HHHHHH if you got 0, 1, 2, or 3 matches respectively.
>
>
> |
83,303 | Imagine we're playing a game of mastermind with the usual eight colours, only this version has six holes across in which to place colours. And to make it easier for you I tell you that I have filled all six with the same colour.
**What is the minimum maximum number of turns you require to get the correct answer? How do you do it?** | 2019/04/28 | [
"https://puzzling.stackexchange.com/questions/83303",
"https://puzzling.stackexchange.com",
"https://puzzling.stackexchange.com/users/50579/"
] | >
> Two guesses are enough to find the color, a third guess to give the correct code.
>
>
>
> Name the colors with letter A to H.
>
> Guess 1: AABCDE.
>
> - If you get 2 matches, the color is A.
>
> - If you get 1 match, it is B, C, D or E. Guess 2: CDDEEE. The color is B, C, D or E for respectively 0, 1, 2 or 3 matches.
>
> - If you get 0 match, it is F, G or H. Guess 2: FGGHHH. The color is F, G or H for resp. 1, 2 or 3 matches.
>
> If it is required to complete the game, enter the color everywhere as guess 3.
>
>
>
> It is easy to see that with 2 guesses you can find the correct color among even 9.
>
>
> | Posted this before reading other answers.
Edit: After reading other posts.
Minimum worst case with best play:
>
> ~~4~~ 3 guesses.
>
>
>
Because:
>
> First turn: use 4 colours, no matter how you do that worst case is no hits and all you know is that it's one of the remaining four.
>
> ~~Second turn: use 2 of the known colours, similarly worst case no hits and all we now know is that it's one of the two remaining colours.~~
>
> ~~Third turn: use 1 of the known colours, worst case no hit and we get it on the next turn.~~
>
> Once we know it's 1 of 4 colours we can put them forward in groups of 3, 2, 1, and none (the colour left out).
>
> So the second turns becomes: 3 of one colour, 2 of another with 1 of a third colour. Whatever the score is we'll know the correct colour for the 3rd turn.
>
>
> |
83,303 | Imagine we're playing a game of mastermind with the usual eight colours, only this version has six holes across in which to place colours. And to make it easier for you I tell you that I have filled all six with the same colour.
**What is the minimum maximum number of turns you require to get the correct answer? How do you do it?** | 2019/04/28 | [
"https://puzzling.stackexchange.com/questions/83303",
"https://puzzling.stackexchange.com",
"https://puzzling.stackexchange.com/users/50579/"
] | >
> Two guesses are enough to find the color, a third guess to give the correct code.
>
>
>
> Name the colors with letter A to H.
>
> Guess 1: AABCDE.
>
> - If you get 2 matches, the color is A.
>
> - If you get 1 match, it is B, C, D or E. Guess 2: CDDEEE. The color is B, C, D or E for respectively 0, 1, 2 or 3 matches.
>
> - If you get 0 match, it is F, G or H. Guess 2: FGGHHH. The color is F, G or H for resp. 1, 2 or 3 matches.
>
> If it is required to complete the game, enter the color everywhere as guess 3.
>
>
>
> It is easy to see that with 2 guesses you can find the correct color among even 9.
>
>
> | My algorithm will probably be almost the same as the others but I just wanna show another way. So my answer is
>
> Require 3 guesses to guarantee know the colour
>
>
>
My explanation
>
> Label my colours as A, B, C, D, E, F, G and H
> First Guess: ABBCCC. If 0 match, the colour is D, E, F, G or H. If 1 match, the colour A. If 2 matches, the colour is B. If 3 matches, the colour is C.
> If 0 match in the first guess, proceed to second guess.
>
> Second guess: DEEFFF. Same logic as first guess. If 0 match, the colour is either G or H. If 1 match the colour D. If 2 matches, the colour is E. If 3 matches, the colour is F.
> If 0 match in the second guess, proceed to third guess.
>
> Third guess: GGGGGG: If all correct, the colour is G. If all wrong, the colour is H.
>
>
> |
83,303 | Imagine we're playing a game of mastermind with the usual eight colours, only this version has six holes across in which to place colours. And to make it easier for you I tell you that I have filled all six with the same colour.
**What is the minimum maximum number of turns you require to get the correct answer? How do you do it?** | 2019/04/28 | [
"https://puzzling.stackexchange.com/questions/83303",
"https://puzzling.stackexchange.com",
"https://puzzling.stackexchange.com/users/50579/"
] | >
> Two guesses are enough to find the color, a third guess to give the correct code.
>
>
>
> Name the colors with letter A to H.
>
> Guess 1: AABCDE.
>
> - If you get 2 matches, the color is A.
>
> - If you get 1 match, it is B, C, D or E. Guess 2: CDDEEE. The color is B, C, D or E for respectively 0, 1, 2 or 3 matches.
>
> - If you get 0 match, it is F, G or H. Guess 2: FGGHHH. The color is F, G or H for resp. 1, 2 or 3 matches.
>
> If it is required to complete the game, enter the color everywhere as guess 3.
>
>
>
> It is easy to see that with 2 guesses you can find the correct color among even 9.
>
>
> | Similar to Florian F's answer, but with a better chance to solve quicker.
>
> Guaranteed in 3 guesses with a 25% chance to solve in 2 guesses
>
>
>
>
> On turn 1 guess ABCCDD:
>
>
> - If you get 1 match, it's A or B—2 matches it's C or D. Turns 2 and 3 can be AAAAAA and BBBBBB or CCCCCC and DDDDDD respectively to get the correct answer within at most 3 guesses.
>
>
> - If you get 0 matches on turn 1, guess FGGHHH on turn 2. Guess 3 should be EEEEEE, FFFFFF, GGGGGG, or HHHHHH if you got 0, 1, 2, or 3 matches respectively.
>
>
> |
83,303 | Imagine we're playing a game of mastermind with the usual eight colours, only this version has six holes across in which to place colours. And to make it easier for you I tell you that I have filled all six with the same colour.
**What is the minimum maximum number of turns you require to get the correct answer? How do you do it?** | 2019/04/28 | [
"https://puzzling.stackexchange.com/questions/83303",
"https://puzzling.stackexchange.com",
"https://puzzling.stackexchange.com/users/50579/"
] | Similar to Florian F's answer, but with a better chance to solve quicker.
>
> Guaranteed in 3 guesses with a 25% chance to solve in 2 guesses
>
>
>
>
> On turn 1 guess ABCCDD:
>
>
> - If you get 1 match, it's A or B—2 matches it's C or D. Turns 2 and 3 can be AAAAAA and BBBBBB or CCCCCC and DDDDDD respectively to get the correct answer within at most 3 guesses.
>
>
> - If you get 0 matches on turn 1, guess FGGHHH on turn 2. Guess 3 should be EEEEEE, FFFFFF, GGGGGG, or HHHHHH if you got 0, 1, 2, or 3 matches respectively.
>
>
> | Posted this before reading other answers.
Edit: After reading other posts.
Minimum worst case with best play:
>
> ~~4~~ 3 guesses.
>
>
>
Because:
>
> First turn: use 4 colours, no matter how you do that worst case is no hits and all you know is that it's one of the remaining four.
>
> ~~Second turn: use 2 of the known colours, similarly worst case no hits and all we now know is that it's one of the two remaining colours.~~
>
> ~~Third turn: use 1 of the known colours, worst case no hit and we get it on the next turn.~~
>
> Once we know it's 1 of 4 colours we can put them forward in groups of 3, 2, 1, and none (the colour left out).
>
> So the second turns becomes: 3 of one colour, 2 of another with 1 of a third colour. Whatever the score is we'll know the correct colour for the 3rd turn.
>
>
> |
83,303 | Imagine we're playing a game of mastermind with the usual eight colours, only this version has six holes across in which to place colours. And to make it easier for you I tell you that I have filled all six with the same colour.
**What is the minimum maximum number of turns you require to get the correct answer? How do you do it?** | 2019/04/28 | [
"https://puzzling.stackexchange.com/questions/83303",
"https://puzzling.stackexchange.com",
"https://puzzling.stackexchange.com/users/50579/"
] | Similar to Florian F's answer, but with a better chance to solve quicker.
>
> Guaranteed in 3 guesses with a 25% chance to solve in 2 guesses
>
>
>
>
> On turn 1 guess ABCCDD:
>
>
> - If you get 1 match, it's A or B—2 matches it's C or D. Turns 2 and 3 can be AAAAAA and BBBBBB or CCCCCC and DDDDDD respectively to get the correct answer within at most 3 guesses.
>
>
> - If you get 0 matches on turn 1, guess FGGHHH on turn 2. Guess 3 should be EEEEEE, FFFFFF, GGGGGG, or HHHHHH if you got 0, 1, 2, or 3 matches respectively.
>
>
> | My algorithm will probably be almost the same as the others but I just wanna show another way. So my answer is
>
> Require 3 guesses to guarantee know the colour
>
>
>
My explanation
>
> Label my colours as A, B, C, D, E, F, G and H
> First Guess: ABBCCC. If 0 match, the colour is D, E, F, G or H. If 1 match, the colour A. If 2 matches, the colour is B. If 3 matches, the colour is C.
> If 0 match in the first guess, proceed to second guess.
>
> Second guess: DEEFFF. Same logic as first guess. If 0 match, the colour is either G or H. If 1 match the colour D. If 2 matches, the colour is E. If 3 matches, the colour is F.
> If 0 match in the second guess, proceed to third guess.
>
> Third guess: GGGGGG: If all correct, the colour is G. If all wrong, the colour is H.
>
>
> |
234,245 | Need some advices on choosing open source web analytics tools, including both of page tagging and log file analysis type. I know some of them: piwik, open web analytics, awstats and more... what are the best ones among them(page tagging type and log file analysis type) ? | 2011/02/11 | [
"https://serverfault.com/questions/234245",
"https://serverfault.com",
"https://serverfault.com/users/14243/"
] | For my money, the best log analysis tool is [analog](http://analog.cx). It's screamingly fast (modulo DNS lookups, which are equally slow for everyone), is written by an ex-Cambridge statistician, and has [a very useful page](http://analog.cx/docs/webworks.html) telling you - and your management - what **can** and **cannot** properly be known from your web logs, bizarre commercial claims notwithstanding.
I can't comment on page tagging, though; sorry. | I know people who use [Webalizer](http://www.mrunix.net/webalizer/) for Web site log analysis. Just to mention one more option.
There's also [this](https://serverfault.com/questions/8328/is-there-a-good-alternative-to-analog-for-web-server-log-analysis) discussion about the possibilities. |
234,245 | Need some advices on choosing open source web analytics tools, including both of page tagging and log file analysis type. I know some of them: piwik, open web analytics, awstats and more... what are the best ones among them(page tagging type and log file analysis type) ? | 2011/02/11 | [
"https://serverfault.com/questions/234245",
"https://serverfault.com",
"https://serverfault.com/users/14243/"
] | For my money, the best log analysis tool is [analog](http://analog.cx). It's screamingly fast (modulo DNS lookups, which are equally slow for everyone), is written by an ex-Cambridge statistician, and has [a very useful page](http://analog.cx/docs/webworks.html) telling you - and your management - what **can** and **cannot** properly be known from your web logs, bizarre commercial claims notwithstanding.
I can't comment on page tagging, though; sorry. | After some research on open source web analytics packages I think the clear winners are <http://www.openwebanalytics.com> and
<http://piwik.org/>
Reason being the ease of use, installation real-time capabilites.
One impressive feature I would like to mention is Heat Map generated by openwebanalytics. |
234,245 | Need some advices on choosing open source web analytics tools, including both of page tagging and log file analysis type. I know some of them: piwik, open web analytics, awstats and more... what are the best ones among them(page tagging type and log file analysis type) ? | 2011/02/11 | [
"https://serverfault.com/questions/234245",
"https://serverfault.com",
"https://serverfault.com/users/14243/"
] | This is experimental software, but nevertheless, quite impressive:
* <http://projects.nuttnet.net/hummingbird/>
>
> Hummingbird lets you see how visitors are interacting with your website in real time. And by “real time” we don’t mean it refreshes every 5 minutes—WebSockets enable Hummingbird to update 20 times per second. Hummingbird is built on top of Node.js, a new javascript web toolkit that can handle large amounts of traffic and many concurrent users.
>
>
> | [Boomerang](http://developer.yahoo.com/blogs/ydn/posts/2010/06/performance_testing_with_boomerang/) is the best tool available for clientside performance analysis - but its just the js agent - I don't know of any off-the-shelf reporting tool, [Pastmon](http://pastmon.sourceforge.net) is useful for network stuff, Piwik and AwStats you've already mentioned. Analog is a very similar tool to AwStats - less configurable but much faster processing.
If you're looking to roll your own solution, there's free [ip to location data available](http://ipinfodb.com/ip_database.php) |
234,245 | Need some advices on choosing open source web analytics tools, including both of page tagging and log file analysis type. I know some of them: piwik, open web analytics, awstats and more... what are the best ones among them(page tagging type and log file analysis type) ? | 2011/02/11 | [
"https://serverfault.com/questions/234245",
"https://serverfault.com",
"https://serverfault.com/users/14243/"
] | In the log files analyzer domain, these are the most widely used:
* AWStats
* Webalizer
* Analog
* W3Perl
Analog and Webalizer are written in C and are the faster (10000-20000 lines per second).
As mentioned earlier by @MadHatter Analog has been developed by an ex-Cambridge statistician, that makes Analog a really precise and technical tool, but since the year 2005 it's not developed anymore.
Webalizer is not developed anymore but it's easier then Analog to be used.
AWStat and W3Perl are written in Perl and they are the most active projects, but are faraway slower then Analog and Webalizer (3000/4500 lines per second).
They differ from each others for the data produced and the way the data is rendered.
AWStat displays statistics in a really attractive manner, but produce less statistics then W3Perl.
I advice you these links for further info:
<http://www.aardal.com/stats/docs/uk/speed.html>
<http://www.w3perl.com/>
<http://awstats.sourceforge.net/>
My advice is:
* W3Perl if you want granular statistics and you don't have too many GB of log files
* AWStat in the case you need don't have too many GB of files and you want a nice graphical representation.
* Webalizer if you have tons of log files to analyze.
* Analog if you need really accurate statistics, huge log files and you have C development experience (or you know anybody who can help).
Regarding Page tagging The winner is surelly Google Analytics, has the data collected and produced is better than the other solutions, but as one day may happens that Google will ask money for it...
W3Counter and Xiti are providers that require you, for the free version, to install an image on each web page you want to monitor. Both are for small sites.
Open Web Analytics and Pikwik are great open source solutions.
Both are quite mature and stable but they require MySQL database and PHP support.
If you don't need an "home made" solution I would definitively go for Google Analytics and between the open source projects I would choose Open Web Analytics as it's more mature then Piwik. | After some research on open source web analytics packages I think the clear winners are <http://www.openwebanalytics.com> and
<http://piwik.org/>
Reason being the ease of use, installation real-time capabilites.
One impressive feature I would like to mention is Heat Map generated by openwebanalytics. |
234,245 | Need some advices on choosing open source web analytics tools, including both of page tagging and log file analysis type. I know some of them: piwik, open web analytics, awstats and more... what are the best ones among them(page tagging type and log file analysis type) ? | 2011/02/11 | [
"https://serverfault.com/questions/234245",
"https://serverfault.com",
"https://serverfault.com/users/14243/"
] | This is experimental software, but nevertheless, quite impressive:
* <http://projects.nuttnet.net/hummingbird/>
>
> Hummingbird lets you see how visitors are interacting with your website in real time. And by “real time” we don’t mean it refreshes every 5 minutes—WebSockets enable Hummingbird to update 20 times per second. Hummingbird is built on top of Node.js, a new javascript web toolkit that can handle large amounts of traffic and many concurrent users.
>
>
> | I know people who use [Webalizer](http://www.mrunix.net/webalizer/) for Web site log analysis. Just to mention one more option.
There's also [this](https://serverfault.com/questions/8328/is-there-a-good-alternative-to-analog-for-web-server-log-analysis) discussion about the possibilities. |
234,245 | Need some advices on choosing open source web analytics tools, including both of page tagging and log file analysis type. I know some of them: piwik, open web analytics, awstats and more... what are the best ones among them(page tagging type and log file analysis type) ? | 2011/02/11 | [
"https://serverfault.com/questions/234245",
"https://serverfault.com",
"https://serverfault.com/users/14243/"
] | I would say (although I'm biased as co-founder ;-) that [SnowPlow](http://snowplowanalytics.com) is the most powerful open source tagging-based web analytics tool out there.
SnowPlow has a loosely coupled, distributed architecture which uses Hadoop and Hive, so it scales to millions or even billions of events - this is something that no MySQL or other RDBMS-based solution can do.
The other big innovation in SnowPlow is that your event data is stored in a clean, immutable, denormalised, atomic "flat file" structure - in other words, an analytics data warehouse. This enables a lot of very sophisticated analyses using Hive, as well as straightforward joins with your third-party data (e.g. CRM or sales data). Again, this is more powerful than other solutions, which tend to collapse atomic data into aggregates, truncate old data or use head-scratching normalised structures which are really hard to query directly or join to other sources.
You can read more about [SnowPlow's technical architecture here](https://github.com/snowplow/snowplow/wiki/Technical-architecture). | After some research on open source web analytics packages I think the clear winners are <http://www.openwebanalytics.com> and
<http://piwik.org/>
Reason being the ease of use, installation real-time capabilites.
One impressive feature I would like to mention is Heat Map generated by openwebanalytics. |
234,245 | Need some advices on choosing open source web analytics tools, including both of page tagging and log file analysis type. I know some of them: piwik, open web analytics, awstats and more... what are the best ones among them(page tagging type and log file analysis type) ? | 2011/02/11 | [
"https://serverfault.com/questions/234245",
"https://serverfault.com",
"https://serverfault.com/users/14243/"
] | I would say (although I'm biased as co-founder ;-) that [SnowPlow](http://snowplowanalytics.com) is the most powerful open source tagging-based web analytics tool out there.
SnowPlow has a loosely coupled, distributed architecture which uses Hadoop and Hive, so it scales to millions or even billions of events - this is something that no MySQL or other RDBMS-based solution can do.
The other big innovation in SnowPlow is that your event data is stored in a clean, immutable, denormalised, atomic "flat file" structure - in other words, an analytics data warehouse. This enables a lot of very sophisticated analyses using Hive, as well as straightforward joins with your third-party data (e.g. CRM or sales data). Again, this is more powerful than other solutions, which tend to collapse atomic data into aggregates, truncate old data or use head-scratching normalised structures which are really hard to query directly or join to other sources.
You can read more about [SnowPlow's technical architecture here](https://github.com/snowplow/snowplow/wiki/Technical-architecture). | I know people who use [Webalizer](http://www.mrunix.net/webalizer/) for Web site log analysis. Just to mention one more option.
There's also [this](https://serverfault.com/questions/8328/is-there-a-good-alternative-to-analog-for-web-server-log-analysis) discussion about the possibilities. |
234,245 | Need some advices on choosing open source web analytics tools, including both of page tagging and log file analysis type. I know some of them: piwik, open web analytics, awstats and more... what are the best ones among them(page tagging type and log file analysis type) ? | 2011/02/11 | [
"https://serverfault.com/questions/234245",
"https://serverfault.com",
"https://serverfault.com/users/14243/"
] | I am very satisfied with piwik. I just miss the possibility to adjust the widgets dependent on the website. I use it to check my drupal sites and there is a module for drupal too. | For my money, the best log analysis tool is [analog](http://analog.cx). It's screamingly fast (modulo DNS lookups, which are equally slow for everyone), is written by an ex-Cambridge statistician, and has [a very useful page](http://analog.cx/docs/webworks.html) telling you - and your management - what **can** and **cannot** properly be known from your web logs, bizarre commercial claims notwithstanding.
I can't comment on page tagging, though; sorry. |
234,245 | Need some advices on choosing open source web analytics tools, including both of page tagging and log file analysis type. I know some of them: piwik, open web analytics, awstats and more... what are the best ones among them(page tagging type and log file analysis type) ? | 2011/02/11 | [
"https://serverfault.com/questions/234245",
"https://serverfault.com",
"https://serverfault.com/users/14243/"
] | In the log files analyzer domain, these are the most widely used:
* AWStats
* Webalizer
* Analog
* W3Perl
Analog and Webalizer are written in C and are the faster (10000-20000 lines per second).
As mentioned earlier by @MadHatter Analog has been developed by an ex-Cambridge statistician, that makes Analog a really precise and technical tool, but since the year 2005 it's not developed anymore.
Webalizer is not developed anymore but it's easier then Analog to be used.
AWStat and W3Perl are written in Perl and they are the most active projects, but are faraway slower then Analog and Webalizer (3000/4500 lines per second).
They differ from each others for the data produced and the way the data is rendered.
AWStat displays statistics in a really attractive manner, but produce less statistics then W3Perl.
I advice you these links for further info:
<http://www.aardal.com/stats/docs/uk/speed.html>
<http://www.w3perl.com/>
<http://awstats.sourceforge.net/>
My advice is:
* W3Perl if you want granular statistics and you don't have too many GB of log files
* AWStat in the case you need don't have too many GB of files and you want a nice graphical representation.
* Webalizer if you have tons of log files to analyze.
* Analog if you need really accurate statistics, huge log files and you have C development experience (or you know anybody who can help).
Regarding Page tagging The winner is surelly Google Analytics, has the data collected and produced is better than the other solutions, but as one day may happens that Google will ask money for it...
W3Counter and Xiti are providers that require you, for the free version, to install an image on each web page you want to monitor. Both are for small sites.
Open Web Analytics and Pikwik are great open source solutions.
Both are quite mature and stable but they require MySQL database and PHP support.
If you don't need an "home made" solution I would definitively go for Google Analytics and between the open source projects I would choose Open Web Analytics as it's more mature then Piwik. | I know people who use [Webalizer](http://www.mrunix.net/webalizer/) for Web site log analysis. Just to mention one more option.
There's also [this](https://serverfault.com/questions/8328/is-there-a-good-alternative-to-analog-for-web-server-log-analysis) discussion about the possibilities. |
234,245 | Need some advices on choosing open source web analytics tools, including both of page tagging and log file analysis type. I know some of them: piwik, open web analytics, awstats and more... what are the best ones among them(page tagging type and log file analysis type) ? | 2011/02/11 | [
"https://serverfault.com/questions/234245",
"https://serverfault.com",
"https://serverfault.com/users/14243/"
] | In the log files analyzer domain, these are the most widely used:
* AWStats
* Webalizer
* Analog
* W3Perl
Analog and Webalizer are written in C and are the faster (10000-20000 lines per second).
As mentioned earlier by @MadHatter Analog has been developed by an ex-Cambridge statistician, that makes Analog a really precise and technical tool, but since the year 2005 it's not developed anymore.
Webalizer is not developed anymore but it's easier then Analog to be used.
AWStat and W3Perl are written in Perl and they are the most active projects, but are faraway slower then Analog and Webalizer (3000/4500 lines per second).
They differ from each others for the data produced and the way the data is rendered.
AWStat displays statistics in a really attractive manner, but produce less statistics then W3Perl.
I advice you these links for further info:
<http://www.aardal.com/stats/docs/uk/speed.html>
<http://www.w3perl.com/>
<http://awstats.sourceforge.net/>
My advice is:
* W3Perl if you want granular statistics and you don't have too many GB of log files
* AWStat in the case you need don't have too many GB of files and you want a nice graphical representation.
* Webalizer if you have tons of log files to analyze.
* Analog if you need really accurate statistics, huge log files and you have C development experience (or you know anybody who can help).
Regarding Page tagging The winner is surelly Google Analytics, has the data collected and produced is better than the other solutions, but as one day may happens that Google will ask money for it...
W3Counter and Xiti are providers that require you, for the free version, to install an image on each web page you want to monitor. Both are for small sites.
Open Web Analytics and Pikwik are great open source solutions.
Both are quite mature and stable but they require MySQL database and PHP support.
If you don't need an "home made" solution I would definitively go for Google Analytics and between the open source projects I would choose Open Web Analytics as it's more mature then Piwik. | I would say (although I'm biased as co-founder ;-) that [SnowPlow](http://snowplowanalytics.com) is the most powerful open source tagging-based web analytics tool out there.
SnowPlow has a loosely coupled, distributed architecture which uses Hadoop and Hive, so it scales to millions or even billions of events - this is something that no MySQL or other RDBMS-based solution can do.
The other big innovation in SnowPlow is that your event data is stored in a clean, immutable, denormalised, atomic "flat file" structure - in other words, an analytics data warehouse. This enables a lot of very sophisticated analyses using Hive, as well as straightforward joins with your third-party data (e.g. CRM or sales data). Again, this is more powerful than other solutions, which tend to collapse atomic data into aggregates, truncate old data or use head-scratching normalised structures which are really hard to query directly or join to other sources.
You can read more about [SnowPlow's technical architecture here](https://github.com/snowplow/snowplow/wiki/Technical-architecture). |
162,884 | I have been working for an IT company for five years. Four of those years were I worked with the same technology but for reasons that changed and I was moved to another project but I moved out for not being an expert in a technology I had ever touched (I asked for it because the work environment was unbearable). So I have moved to another one again with new technology--the same story and so on. So again I was in a new project where I starting from nothing (by the way I got lied about in what I am gonna work so I had a month to study on my own about new think for nothing) and I got feeling that the same thing is gonna happen again.
The thing is here once you spend three or more years in the company you are expected to know absolutely everything. For that reason, in my opinion, people move out or just go higher into a manager position. There are not many who spend more than three years in the company and aren't in a manager position.
What is the best way to handle this situation? | 2020/08/18 | [
"https://workplace.stackexchange.com/questions/162884",
"https://workplace.stackexchange.com",
"https://workplace.stackexchange.com/users/44315/"
] | It's not impossible to be an expert in a technology you've never touched. Remember the old proverb: in the land of the blind, the one-eyed man is king. When such a role is requested of you, make sure that your employer is fully aware that you are not currently an expert in the technology they're asking you to be 'responsible' for.
As long as they understand this, you should be fine. I imagine the practice to be something like this:
A user comes to you with a problem. You ask them questions to fully understand the problem (to the best of your ability) and once you feel you have a decent grasp, you start researching the problem and come up with a solution. You then present this solution to the user.
Obviously this takes you longer than it would take someone who is already experienced in using the technology, hence why it is so important that your employer is aware of what they are asking. Nobody reasonably expects you to suddenly become an expert at a new technology out of thin air. It's just simpler to have a single point of contact who is responsible for spending the time and effort to solve issues and become more familiar with a particular technology, even when it would be preferable if this position is filled by someone who already has some expertise with it. | The situation you describe is quite extreme, but not necessary to be feared much - at least, if it remains within some boundaries.
I saw something similar happening to me and my colleagues, in more than one company - actually in all of the companies where I worked.
To nominate an expert, the following assertions / decisions are made:
1. if more than one person knows about the subject, usually the most knowledgeable becomes the expert; alternatively, the most experienced in general might become the expert, even if the person is not really the most knowledgeable in that field;
2. if only one person has to work in that field, and there is no one else around with the respective knowledge, then that person becomes the expert - eventually after "passing" a training period - which can even be a training-on-the-job.
Usually the managers support the "expert" from situation 2, and do not "kill him much" for a while, until he gets a chance to learn. However, officially that person is always presented as the "expert on topic X".
---
**Good or bad?**
Well, it depends. If the managers do not expect miracles, and the person really wants to learn, then the situation is a very good opportunity to learn a new skill.
If the managers expect that a simple nomination transforms an illiterate into a genius, then the person should probably find new managers, most likely in a new company. |
162,884 | I have been working for an IT company for five years. Four of those years were I worked with the same technology but for reasons that changed and I was moved to another project but I moved out for not being an expert in a technology I had ever touched (I asked for it because the work environment was unbearable). So I have moved to another one again with new technology--the same story and so on. So again I was in a new project where I starting from nothing (by the way I got lied about in what I am gonna work so I had a month to study on my own about new think for nothing) and I got feeling that the same thing is gonna happen again.
The thing is here once you spend three or more years in the company you are expected to know absolutely everything. For that reason, in my opinion, people move out or just go higher into a manager position. There are not many who spend more than three years in the company and aren't in a manager position.
What is the best way to handle this situation? | 2020/08/18 | [
"https://workplace.stackexchange.com/questions/162884",
"https://workplace.stackexchange.com",
"https://workplace.stackexchange.com/users/44315/"
] | It's not impossible to be an expert in a technology you've never touched. Remember the old proverb: in the land of the blind, the one-eyed man is king. When such a role is requested of you, make sure that your employer is fully aware that you are not currently an expert in the technology they're asking you to be 'responsible' for.
As long as they understand this, you should be fine. I imagine the practice to be something like this:
A user comes to you with a problem. You ask them questions to fully understand the problem (to the best of your ability) and once you feel you have a decent grasp, you start researching the problem and come up with a solution. You then present this solution to the user.
Obviously this takes you longer than it would take someone who is already experienced in using the technology, hence why it is so important that your employer is aware of what they are asking. Nobody reasonably expects you to suddenly become an expert at a new technology out of thin air. It's just simpler to have a single point of contact who is responsible for spending the time and effort to solve issues and become more familiar with a particular technology, even when it would be preferable if this position is filled by someone who already has some expertise with it. | As long as management is clear about your current level of expertise and it is something you are interested in, take the assignment as an opportunity to acquire skills on company time.
If you don't want to learn the skill and you still have the assignment, find another job. |
162,884 | I have been working for an IT company for five years. Four of those years were I worked with the same technology but for reasons that changed and I was moved to another project but I moved out for not being an expert in a technology I had ever touched (I asked for it because the work environment was unbearable). So I have moved to another one again with new technology--the same story and so on. So again I was in a new project where I starting from nothing (by the way I got lied about in what I am gonna work so I had a month to study on my own about new think for nothing) and I got feeling that the same thing is gonna happen again.
The thing is here once you spend three or more years in the company you are expected to know absolutely everything. For that reason, in my opinion, people move out or just go higher into a manager position. There are not many who spend more than three years in the company and aren't in a manager position.
What is the best way to handle this situation? | 2020/08/18 | [
"https://workplace.stackexchange.com/questions/162884",
"https://workplace.stackexchange.com",
"https://workplace.stackexchange.com/users/44315/"
] | The situation you describe is quite extreme, but not necessary to be feared much - at least, if it remains within some boundaries.
I saw something similar happening to me and my colleagues, in more than one company - actually in all of the companies where I worked.
To nominate an expert, the following assertions / decisions are made:
1. if more than one person knows about the subject, usually the most knowledgeable becomes the expert; alternatively, the most experienced in general might become the expert, even if the person is not really the most knowledgeable in that field;
2. if only one person has to work in that field, and there is no one else around with the respective knowledge, then that person becomes the expert - eventually after "passing" a training period - which can even be a training-on-the-job.
Usually the managers support the "expert" from situation 2, and do not "kill him much" for a while, until he gets a chance to learn. However, officially that person is always presented as the "expert on topic X".
---
**Good or bad?**
Well, it depends. If the managers do not expect miracles, and the person really wants to learn, then the situation is a very good opportunity to learn a new skill.
If the managers expect that a simple nomination transforms an illiterate into a genius, then the person should probably find new managers, most likely in a new company. | As long as management is clear about your current level of expertise and it is something you are interested in, take the assignment as an opportunity to acquire skills on company time.
If you don't want to learn the skill and you still have the assignment, find another job. |
126,862 | For the last 5 years (delayed partly by teaching, a parent's death and caregiving for another parent), I've been writing a textbook that examines a famous 18th-century political work. The proposal was accepted and a year later, I got very positive feedback on the first half of the manuscript.
I finally submitted the entire manuscript in early December 2018 and felt quite confident about it--despite the fact that my Ph.D. is in English literature and not history or poli sci. I wrote to the editor back in late January to see if he'd gotten any word; he replied that he hadn't heard anything and to wait until late February. I've been writing to him once a week since then--and twice last week, but with no luck. It's strange because when I was corresponding with him back in August-December, he always answered very promptly.
I've tried writing to the editor who approved the book proposal (he's since moved onto another department) and another who was a supervising editor. No response. I am really stumped: what can I do since I cannot seem to reach anyone at all? I realize there's not much action I can take and that there are any number of scenarios (maybe none of the reviewers liked it and they are sending to others?), but it is really driving me up a wall. I've looked up the "Contact us" section in the publisher's website, but there is no information on the editor of the textbook for the series that I am editing. There are no phone numbers either. Any advice? | 2019/03/21 | [
"https://academia.stackexchange.com/questions/126862",
"https://academia.stackexchange.com",
"https://academia.stackexchange.com/users/105877/"
] | Obviously I don't know how this particular editor works (and I'm not familiar with textbook edition), but it's quite common for an academic review process to take several months or even more than a year. Another general fact about reviewing: if reviewers don't like it they don't send it to another reviewer, they write a bad review and you will be informed about it.
Unless this editor promised you a fast review process, from the information you provide it looks to me like there's nothing to worry about. At this stage the reviewers have your book but it's possible that some of them haven't even started reading it yet.
>
> I've been writing to him once a week since then--and twice last week, but with no luck.
>
>
>
Are you sure this editor was happy about you emailing him every week? Unless you are in very friendly terms with him, your frequent emails might be a bit annoying to him! And that might explain why he stopped answering.
Obviously I don't know any specifics, but it seems to me that there's absolutely no reason to panic: as you said, the first half was well received and you were feeling confident about it when you submitted. Try to go back to this original state of mind instead of imagining the worst. Delays are frequent in a review process and they are not a sign of negative outcome... just a sign that everybody is busy. Patience and good luck! | Your question is vague about what stage the manuscript is in. I can see two main possibilities:
1. If your manuscript is currently **being peer reviewed**, then writing in every week is way too often. The time needed for book reviews varies by discipline, but they're on the order of magnitude as the time taken for journal article reviews, i.e. months. The review will be done when it's done; don't pester the editor.
2. The other possibility is your manuscript is currently **in production**. In this case the timeline is more secure (everything is in the publisher's control), but the time taken to get from raw manuscript to first proofs can be quite substantial. First the manuscript has to be copyedited, and then it has to be typeset. Depending on how many pages it is, these two processes combined can easily take 4-6 weeks or even more if the publisher is short on resources.
I suggest waiting for longer before writing in again. The publisher will eventually contact you - they'll need your input e.g. on the book cover. |
8,368 | To give some background, I currently live with a couple of friends in a 3 bedroom apartment. The living arrangement is good however I'm tired of not building equity. I've tossed the idea out for two of us to buy a house sometime within the next 1.5 years, as the 3rd wants to continue renting for awhile. To me, the primary advantage of this is that we would both gain equity and could afford a nicer house.
I would like to better understand the risks and benefits of such an arrangement.
Some extra facts:
* Neither of us have ever owned a home.
* We reside in NJ
* We both have good credit
* I like the idea of using FHA however don't know if you can with 2 individuals that aren't married. | 2011/05/13 | [
"https://money.stackexchange.com/questions/8368",
"https://money.stackexchange.com",
"https://money.stackexchange.com/users/3635/"
] | Unlike others who have answered the question - I **have** done this. Here is my experience - your mileage and friendship may vary:
I bought a condo years ago with a longtime childhood friend. We did it for all the reasons you mentioned - sick of renting and not building equity, were both young, single professionals who had the money. The market crashed we have both since married and moved on to own other properties with our spouses. Now we rent out the condo as selling in the current market is not doable.. It's not an ideal situation but that is because of the real estate market - not who I bought with.
You need to discuss very openly all of the following scenarios, as well as others I can't think of right now I am sure:
* What if one of us loses our job or for some other reason can't pay
* What if one of us just plain wants out, at any time, even if it means we lose $
* What happens if one of us - God forbid - dies. Who gets the equity or quite possibly the debt?
* What if we both want out but can't sell? Would we rent? Are we comfortable being a landlord? (this one happend to me)
If you aren't both **100% in sync** with these questions then do not do it.
I never understand why some people would buy with a girlfriend/boyfriend but not a good personal friend. You're more likely to have a falling out with your significant other then a long time close friend. My advice, have honest, open conversations, about all possible scenarios. If you feel necessary put somethings down into some sort of legal agreement - with us it was not, and still isn't necessary. | I did this about 8 years ago with a buddy in Chicago for the reasons specified in the original post. As other posters have suggested, we discussed a lot of the same questions listed above, figured out the possible scenarios, and then had a lawyer draw up a contract. We bought a 3 bedroom house, and rented out the 3rd bedroom. Overall, it was a great experience. We both built equity while having a renter pay a third of the mortgage. Plus the property tax and interest on the loan were tax deductible. Compared with renting an apartment, it made us a lot more money. In the end, we sold the house, and split the profits. Assuming you have the personalities to make it work, I say go for it. |
8,368 | To give some background, I currently live with a couple of friends in a 3 bedroom apartment. The living arrangement is good however I'm tired of not building equity. I've tossed the idea out for two of us to buy a house sometime within the next 1.5 years, as the 3rd wants to continue renting for awhile. To me, the primary advantage of this is that we would both gain equity and could afford a nicer house.
I would like to better understand the risks and benefits of such an arrangement.
Some extra facts:
* Neither of us have ever owned a home.
* We reside in NJ
* We both have good credit
* I like the idea of using FHA however don't know if you can with 2 individuals that aren't married. | 2011/05/13 | [
"https://money.stackexchange.com/questions/8368",
"https://money.stackexchange.com",
"https://money.stackexchange.com/users/3635/"
] | A real life experience. A friend of mine did that with his housemates. They bought a house together as students and it worked for them. The tricky bit is to have a very good contract with your housemates as to how the venture should work.
What if? Somebody can't pay, somebody can't enjoy the house (on an extended trip), somebody wants out (marriage, etc.)
It worked for my friend... | I'd be curious to compare current rent with what your overhead would be with a house. Most single people would view your current arrangement as ideal. When those about to graduate college ask for money advice, I offer that they should start by living as though they are still in college, share a house or multibedroomed apartment and sack away the difference. If you really want to buy, and I'd assume for this answer that you feel the housing market in your area has passes its bottom, I'd suggest you run the numbers and see if you can buy the house, 100% yours, but then rent out one or two rooms. You don't share your mortgage details, just charge a fair price. When the stars line up just right, these deals cost you the down payment, but the roommates pay the mortgage.
I discourage the buying by two or more for the reasons MrChrister listed. |
8,368 | To give some background, I currently live with a couple of friends in a 3 bedroom apartment. The living arrangement is good however I'm tired of not building equity. I've tossed the idea out for two of us to buy a house sometime within the next 1.5 years, as the 3rd wants to continue renting for awhile. To me, the primary advantage of this is that we would both gain equity and could afford a nicer house.
I would like to better understand the risks and benefits of such an arrangement.
Some extra facts:
* Neither of us have ever owned a home.
* We reside in NJ
* We both have good credit
* I like the idea of using FHA however don't know if you can with 2 individuals that aren't married. | 2011/05/13 | [
"https://money.stackexchange.com/questions/8368",
"https://money.stackexchange.com",
"https://money.stackexchange.com/users/3635/"
] | No. This amount of money is not appropriate for friends to go in on.
Although you could consider buying a house with a business partner, have the contracts drawn up, see an attorney, read up on the penalties if one of the partners doesn't hold up their end from the law's point of view.
Also, since this is a business arrangement, write and sign all sorts of details regarding the penalties amongst the partners (not just the law) when one person doesn't hold up.
It isn't that you don't have good intentions, or that you couldn't do it just fine if no problems ever happen. The issue is that over the course of a mortgage, which is at least several years, something is very likely to come up. If you and your friend aren't prepared to think about all those issues and how to handle them, you will lose a friend, probably a house and your good credit.
I wouldn't go into business with my best friend because I want him to stay my best friend. | A real life experience. A friend of mine did that with his housemates. They bought a house together as students and it worked for them. The tricky bit is to have a very good contract with your housemates as to how the venture should work.
What if? Somebody can't pay, somebody can't enjoy the house (on an extended trip), somebody wants out (marriage, etc.)
It worked for my friend... |
8,368 | To give some background, I currently live with a couple of friends in a 3 bedroom apartment. The living arrangement is good however I'm tired of not building equity. I've tossed the idea out for two of us to buy a house sometime within the next 1.5 years, as the 3rd wants to continue renting for awhile. To me, the primary advantage of this is that we would both gain equity and could afford a nicer house.
I would like to better understand the risks and benefits of such an arrangement.
Some extra facts:
* Neither of us have ever owned a home.
* We reside in NJ
* We both have good credit
* I like the idea of using FHA however don't know if you can with 2 individuals that aren't married. | 2011/05/13 | [
"https://money.stackexchange.com/questions/8368",
"https://money.stackexchange.com",
"https://money.stackexchange.com/users/3635/"
] | Unlike others who have answered the question - I **have** done this. Here is my experience - your mileage and friendship may vary:
I bought a condo years ago with a longtime childhood friend. We did it for all the reasons you mentioned - sick of renting and not building equity, were both young, single professionals who had the money. The market crashed we have both since married and moved on to own other properties with our spouses. Now we rent out the condo as selling in the current market is not doable.. It's not an ideal situation but that is because of the real estate market - not who I bought with.
You need to discuss very openly all of the following scenarios, as well as others I can't think of right now I am sure:
* What if one of us loses our job or for some other reason can't pay
* What if one of us just plain wants out, at any time, even if it means we lose $
* What happens if one of us - God forbid - dies. Who gets the equity or quite possibly the debt?
* What if we both want out but can't sell? Would we rent? Are we comfortable being a landlord? (this one happend to me)
If you aren't both **100% in sync** with these questions then do not do it.
I never understand why some people would buy with a girlfriend/boyfriend but not a good personal friend. You're more likely to have a falling out with your significant other then a long time close friend. My advice, have honest, open conversations, about all possible scenarios. If you feel necessary put somethings down into some sort of legal agreement - with us it was not, and still isn't necessary. | A real life experience. A friend of mine did that with his housemates. They bought a house together as students and it worked for them. The tricky bit is to have a very good contract with your housemates as to how the venture should work.
What if? Somebody can't pay, somebody can't enjoy the house (on an extended trip), somebody wants out (marriage, etc.)
It worked for my friend... |
8,368 | To give some background, I currently live with a couple of friends in a 3 bedroom apartment. The living arrangement is good however I'm tired of not building equity. I've tossed the idea out for two of us to buy a house sometime within the next 1.5 years, as the 3rd wants to continue renting for awhile. To me, the primary advantage of this is that we would both gain equity and could afford a nicer house.
I would like to better understand the risks and benefits of such an arrangement.
Some extra facts:
* Neither of us have ever owned a home.
* We reside in NJ
* We both have good credit
* I like the idea of using FHA however don't know if you can with 2 individuals that aren't married. | 2011/05/13 | [
"https://money.stackexchange.com/questions/8368",
"https://money.stackexchange.com",
"https://money.stackexchange.com/users/3635/"
] | No. This amount of money is not appropriate for friends to go in on.
Although you could consider buying a house with a business partner, have the contracts drawn up, see an attorney, read up on the penalties if one of the partners doesn't hold up their end from the law's point of view.
Also, since this is a business arrangement, write and sign all sorts of details regarding the penalties amongst the partners (not just the law) when one person doesn't hold up.
It isn't that you don't have good intentions, or that you couldn't do it just fine if no problems ever happen. The issue is that over the course of a mortgage, which is at least several years, something is very likely to come up. If you and your friend aren't prepared to think about all those issues and how to handle them, you will lose a friend, probably a house and your good credit.
I wouldn't go into business with my best friend because I want him to stay my best friend. | I did this about 8 years ago with a buddy in Chicago for the reasons specified in the original post. As other posters have suggested, we discussed a lot of the same questions listed above, figured out the possible scenarios, and then had a lawyer draw up a contract. We bought a 3 bedroom house, and rented out the 3rd bedroom. Overall, it was a great experience. We both built equity while having a renter pay a third of the mortgage. Plus the property tax and interest on the loan were tax deductible. Compared with renting an apartment, it made us a lot more money. In the end, we sold the house, and split the profits. Assuming you have the personalities to make it work, I say go for it. |
8,368 | To give some background, I currently live with a couple of friends in a 3 bedroom apartment. The living arrangement is good however I'm tired of not building equity. I've tossed the idea out for two of us to buy a house sometime within the next 1.5 years, as the 3rd wants to continue renting for awhile. To me, the primary advantage of this is that we would both gain equity and could afford a nicer house.
I would like to better understand the risks and benefits of such an arrangement.
Some extra facts:
* Neither of us have ever owned a home.
* We reside in NJ
* We both have good credit
* I like the idea of using FHA however don't know if you can with 2 individuals that aren't married. | 2011/05/13 | [
"https://money.stackexchange.com/questions/8368",
"https://money.stackexchange.com",
"https://money.stackexchange.com/users/3635/"
] | I'll chime in here with the "don't do it crowd." I think it's fraught with ugly possibilities.
**However**, you may, for various reasons, decide to say, "to hell with it, we'll make it work."
If that is the case, treat it like a business transaction and not an emotional transaction. Work up a binding contract with your attorney for how the two of you will handle issues such as:
* a missed payment
* unemployment
* maintenance
* breakdown in relationship
* etc etc etc there are dozens of items to consider
Of absolutely critical importance is the bail-out clause: how will you handle it when one person says, "Sayonara."
None of this ensures a smooth road - god knows I wouldn't do it - but it could help protect your sanity and some of your investment down the road. Good luck. | Sure, form an LLC with an attorney's advice. You need a buyout clause, operating agreement, etc.
If you're not married, never buy a home for personal use with someone else. |
8,368 | To give some background, I currently live with a couple of friends in a 3 bedroom apartment. The living arrangement is good however I'm tired of not building equity. I've tossed the idea out for two of us to buy a house sometime within the next 1.5 years, as the 3rd wants to continue renting for awhile. To me, the primary advantage of this is that we would both gain equity and could afford a nicer house.
I would like to better understand the risks and benefits of such an arrangement.
Some extra facts:
* Neither of us have ever owned a home.
* We reside in NJ
* We both have good credit
* I like the idea of using FHA however don't know if you can with 2 individuals that aren't married. | 2011/05/13 | [
"https://money.stackexchange.com/questions/8368",
"https://money.stackexchange.com",
"https://money.stackexchange.com/users/3635/"
] | No. This amount of money is not appropriate for friends to go in on.
Although you could consider buying a house with a business partner, have the contracts drawn up, see an attorney, read up on the penalties if one of the partners doesn't hold up their end from the law's point of view.
Also, since this is a business arrangement, write and sign all sorts of details regarding the penalties amongst the partners (not just the law) when one person doesn't hold up.
It isn't that you don't have good intentions, or that you couldn't do it just fine if no problems ever happen. The issue is that over the course of a mortgage, which is at least several years, something is very likely to come up. If you and your friend aren't prepared to think about all those issues and how to handle them, you will lose a friend, probably a house and your good credit.
I wouldn't go into business with my best friend because I want him to stay my best friend. | Unlike others who have answered the question - I **have** done this. Here is my experience - your mileage and friendship may vary:
I bought a condo years ago with a longtime childhood friend. We did it for all the reasons you mentioned - sick of renting and not building equity, were both young, single professionals who had the money. The market crashed we have both since married and moved on to own other properties with our spouses. Now we rent out the condo as selling in the current market is not doable.. It's not an ideal situation but that is because of the real estate market - not who I bought with.
You need to discuss very openly all of the following scenarios, as well as others I can't think of right now I am sure:
* What if one of us loses our job or for some other reason can't pay
* What if one of us just plain wants out, at any time, even if it means we lose $
* What happens if one of us - God forbid - dies. Who gets the equity or quite possibly the debt?
* What if we both want out but can't sell? Would we rent? Are we comfortable being a landlord? (this one happend to me)
If you aren't both **100% in sync** with these questions then do not do it.
I never understand why some people would buy with a girlfriend/boyfriend but not a good personal friend. You're more likely to have a falling out with your significant other then a long time close friend. My advice, have honest, open conversations, about all possible scenarios. If you feel necessary put somethings down into some sort of legal agreement - with us it was not, and still isn't necessary. |
8,368 | To give some background, I currently live with a couple of friends in a 3 bedroom apartment. The living arrangement is good however I'm tired of not building equity. I've tossed the idea out for two of us to buy a house sometime within the next 1.5 years, as the 3rd wants to continue renting for awhile. To me, the primary advantage of this is that we would both gain equity and could afford a nicer house.
I would like to better understand the risks and benefits of such an arrangement.
Some extra facts:
* Neither of us have ever owned a home.
* We reside in NJ
* We both have good credit
* I like the idea of using FHA however don't know if you can with 2 individuals that aren't married. | 2011/05/13 | [
"https://money.stackexchange.com/questions/8368",
"https://money.stackexchange.com",
"https://money.stackexchange.com/users/3635/"
] | No. This amount of money is not appropriate for friends to go in on.
Although you could consider buying a house with a business partner, have the contracts drawn up, see an attorney, read up on the penalties if one of the partners doesn't hold up their end from the law's point of view.
Also, since this is a business arrangement, write and sign all sorts of details regarding the penalties amongst the partners (not just the law) when one person doesn't hold up.
It isn't that you don't have good intentions, or that you couldn't do it just fine if no problems ever happen. The issue is that over the course of a mortgage, which is at least several years, something is very likely to come up. If you and your friend aren't prepared to think about all those issues and how to handle them, you will lose a friend, probably a house and your good credit.
I wouldn't go into business with my best friend because I want him to stay my best friend. | Sure, form an LLC with an attorney's advice. You need a buyout clause, operating agreement, etc.
If you're not married, never buy a home for personal use with someone else. |
8,368 | To give some background, I currently live with a couple of friends in a 3 bedroom apartment. The living arrangement is good however I'm tired of not building equity. I've tossed the idea out for two of us to buy a house sometime within the next 1.5 years, as the 3rd wants to continue renting for awhile. To me, the primary advantage of this is that we would both gain equity and could afford a nicer house.
I would like to better understand the risks and benefits of such an arrangement.
Some extra facts:
* Neither of us have ever owned a home.
* We reside in NJ
* We both have good credit
* I like the idea of using FHA however don't know if you can with 2 individuals that aren't married. | 2011/05/13 | [
"https://money.stackexchange.com/questions/8368",
"https://money.stackexchange.com",
"https://money.stackexchange.com/users/3635/"
] | I'll chime in here with the "don't do it crowd." I think it's fraught with ugly possibilities.
**However**, you may, for various reasons, decide to say, "to hell with it, we'll make it work."
If that is the case, treat it like a business transaction and not an emotional transaction. Work up a binding contract with your attorney for how the two of you will handle issues such as:
* a missed payment
* unemployment
* maintenance
* breakdown in relationship
* etc etc etc there are dozens of items to consider
Of absolutely critical importance is the bail-out clause: how will you handle it when one person says, "Sayonara."
None of this ensures a smooth road - god knows I wouldn't do it - but it could help protect your sanity and some of your investment down the road. Good luck. | A real life experience. A friend of mine did that with his housemates. They bought a house together as students and it worked for them. The tricky bit is to have a very good contract with your housemates as to how the venture should work.
What if? Somebody can't pay, somebody can't enjoy the house (on an extended trip), somebody wants out (marriage, etc.)
It worked for my friend... |
8,368 | To give some background, I currently live with a couple of friends in a 3 bedroom apartment. The living arrangement is good however I'm tired of not building equity. I've tossed the idea out for two of us to buy a house sometime within the next 1.5 years, as the 3rd wants to continue renting for awhile. To me, the primary advantage of this is that we would both gain equity and could afford a nicer house.
I would like to better understand the risks and benefits of such an arrangement.
Some extra facts:
* Neither of us have ever owned a home.
* We reside in NJ
* We both have good credit
* I like the idea of using FHA however don't know if you can with 2 individuals that aren't married. | 2011/05/13 | [
"https://money.stackexchange.com/questions/8368",
"https://money.stackexchange.com",
"https://money.stackexchange.com/users/3635/"
] | No. This amount of money is not appropriate for friends to go in on.
Although you could consider buying a house with a business partner, have the contracts drawn up, see an attorney, read up on the penalties if one of the partners doesn't hold up their end from the law's point of view.
Also, since this is a business arrangement, write and sign all sorts of details regarding the penalties amongst the partners (not just the law) when one person doesn't hold up.
It isn't that you don't have good intentions, or that you couldn't do it just fine if no problems ever happen. The issue is that over the course of a mortgage, which is at least several years, something is very likely to come up. If you and your friend aren't prepared to think about all those issues and how to handle them, you will lose a friend, probably a house and your good credit.
I wouldn't go into business with my best friend because I want him to stay my best friend. | I'll chime in here with the "don't do it crowd." I think it's fraught with ugly possibilities.
**However**, you may, for various reasons, decide to say, "to hell with it, we'll make it work."
If that is the case, treat it like a business transaction and not an emotional transaction. Work up a binding contract with your attorney for how the two of you will handle issues such as:
* a missed payment
* unemployment
* maintenance
* breakdown in relationship
* etc etc etc there are dozens of items to consider
Of absolutely critical importance is the bail-out clause: how will you handle it when one person says, "Sayonara."
None of this ensures a smooth road - god knows I wouldn't do it - but it could help protect your sanity and some of your investment down the road. Good luck. |
1,074 | [Here is a link](http://twentytwowords.com/son-house-talks-about-the-real-old-blues-at-the-newport-folk-festival-1967/) to a three-minute clip from a documentary from the 1965 Newport Folk Festival where the blues singer and guitarist Son House talks about the nature of the blues.
Here is the URL to the video clip posted on YouTube.
<https://youtu.be/EmKguxl9AV0>
He says:
>
> The Real Old Blues don’t call for no jumping. If you go to jumping,
> that ain’t the Blues. They can name it the Blues, but it ain’t the
> Blues.
>
>
>
What does *jumping* mean in this context? | 2015/07/21 | [
"https://musicfans.stackexchange.com/questions/1074",
"https://musicfans.stackexchange.com",
"https://musicfans.stackexchange.com/users/781/"
] | I believe he's talking about the style of blues called [jump blues](https://en.wikipedia.org/wiki/Jump_blues), which was popular in the 1940s and which made use of a large band with a horn section and a piano -- almost a jazz orchestra or big band.
I believe Son House was appealing to the original and more primal form of the blues which is played by just one singer with a guitar. Perhaps he was saying that if the blues is done with a big band and an elaborate production, it ceases to be the genuine blues.
Here is Big Joe Turner and his band doing "Shake, Rattle and Roll" in the jump blues style in 1954.
<https://youtu.be/20Feq_Nt3nM>
Jump blues was revived from the late 1990s through [Brian Setzer and his Orchestra](https://en.wikipedia.org/wiki/Brian_Setzer) and a few other bands. | This is just an educated guess, but I think he's talking (derisively) about dancing. Classic blues is not a dance music, whereas R&B and Rock and Roll, both descended from the blues, are often used for dancing. |
17,545 | I am building an internal database application for Joomla using Fabrik.
I'm interested to know if there are any alternatives to Fabrik for me to use. Maybe some of them have more options? In my case, I am making an ERM/CRM (database for company with clients, cases etc etc what my directors required). What would you use in this case? | 2016/08/16 | [
"https://joomla.stackexchange.com/questions/17545",
"https://joomla.stackexchange.com",
"https://joomla.stackexchange.com/users/7952/"
] | I will advise you to make your own component using Joomla MVC and framework.
The learning curve may be big but then you will have absolute freedom to make any change or development you may need.
I told you as a user and admirer of fabrik.
I did lots of development using it but eventually you realize that the dependence on fabrik and its learning curve ultimately not worth it and it is better if you invest your time learning the native way to develop components with Joomla.
If your project is small, maybe, but for a thing as big as a ERM/CRM I will definitely do it as I told you. | Zoo is another alternative. You can use Chronoforms and ChronoConnect. It isn't easy to setup. Chronoforms can't natively do "Join" on databases like Fabrik can. Here is a link to an example of Chronoforms & Connect together.
<https://blog.grimeymedia.com/chronoforms-chronoconnectivity-5-example/> |
17,545 | I am building an internal database application for Joomla using Fabrik.
I'm interested to know if there are any alternatives to Fabrik for me to use. Maybe some of them have more options? In my case, I am making an ERM/CRM (database for company with clients, cases etc etc what my directors required). What would you use in this case? | 2016/08/16 | [
"https://joomla.stackexchange.com/questions/17545",
"https://joomla.stackexchange.com",
"https://joomla.stackexchange.com/users/7952/"
] | I have made various apps in Fabrik like payrolls, CRM etc. I have also done what you have asked "**database for company with clients, cases etc**" in fabrik only. You have to dive into deep in case of Fabrik, because Fabrik is not what people expect a drag and drop application builder. It is full custom application builder providing full feature to interact with your any other joomla components like K2, virtuemart etc by creating forms using their existing tables. The other important thing I like in Fabrik, you can schedule your email, custom queries by using cron feature.
You can get simple forms every where but no feature of ajax elements requesting updated data on the fly like in Fabrik. | I would use CiviCrm: the main logic is implemented and it can be tuned like you want it. Main reason for me is that there is a team that keeps coding new versions and keeps the whole thing up to date, all based on a use history of years.
Main reason not to do this: it is a lot of work to get it running inside Joomla, and you need to get used to the detailed level of customising that is expected. |
17,545 | I am building an internal database application for Joomla using Fabrik.
I'm interested to know if there are any alternatives to Fabrik for me to use. Maybe some of them have more options? In my case, I am making an ERM/CRM (database for company with clients, cases etc etc what my directors required). What would you use in this case? | 2016/08/16 | [
"https://joomla.stackexchange.com/questions/17545",
"https://joomla.stackexchange.com",
"https://joomla.stackexchange.com/users/7952/"
] | I've used Fabrik for a few projects in the past but for my most recent project I ended up using ChronoForms.
I've used ChronoForms in the past but until recently didn't realize that it's capable of so much more than creating a custom "Contact Us" form. You can easily create lists with Multi-Record Loader, I found those to be more flexible than Fabrik lists. You also have much more control (only if you want to) over how the UI elements are rendered in HTML.
I would also consider using Joomla MVC for coding a custom component from scratch, as suggested by others here, but I am not personally very strong with PHP, so I voted that out for now. | Zoo is another alternative. You can use Chronoforms and ChronoConnect. It isn't easy to setup. Chronoforms can't natively do "Join" on databases like Fabrik can. Here is a link to an example of Chronoforms & Connect together.
<https://blog.grimeymedia.com/chronoforms-chronoconnectivity-5-example/> |
17,545 | I am building an internal database application for Joomla using Fabrik.
I'm interested to know if there are any alternatives to Fabrik for me to use. Maybe some of them have more options? In my case, I am making an ERM/CRM (database for company with clients, cases etc etc what my directors required). What would you use in this case? | 2016/08/16 | [
"https://joomla.stackexchange.com/questions/17545",
"https://joomla.stackexchange.com",
"https://joomla.stackexchange.com/users/7952/"
] | I've used Fabrik for a few projects in the past but for my most recent project I ended up using ChronoForms.
I've used ChronoForms in the past but until recently didn't realize that it's capable of so much more than creating a custom "Contact Us" form. You can easily create lists with Multi-Record Loader, I found those to be more flexible than Fabrik lists. You also have much more control (only if you want to) over how the UI elements are rendered in HTML.
I would also consider using Joomla MVC for coding a custom component from scratch, as suggested by others here, but I am not personally very strong with PHP, so I voted that out for now. | You can use any JoomlaCCK powerful application such as:
a)Fabrik
b)[Cobalt](http://www.mintjoomla.com/joomla-components/cobalt.html)
c)[Seblod](http://www.seblod.com/) |
17,545 | I am building an internal database application for Joomla using Fabrik.
I'm interested to know if there are any alternatives to Fabrik for me to use. Maybe some of them have more options? In my case, I am making an ERM/CRM (database for company with clients, cases etc etc what my directors required). What would you use in this case? | 2016/08/16 | [
"https://joomla.stackexchange.com/questions/17545",
"https://joomla.stackexchange.com",
"https://joomla.stackexchange.com/users/7952/"
] | I will advise you to make your own component using Joomla MVC and framework.
The learning curve may be big but then you will have absolute freedom to make any change or development you may need.
I told you as a user and admirer of fabrik.
I did lots of development using it but eventually you realize that the dependence on fabrik and its learning curve ultimately not worth it and it is better if you invest your time learning the native way to develop components with Joomla.
If your project is small, maybe, but for a thing as big as a ERM/CRM I will definitely do it as I told you. | I have made various apps in Fabrik like payrolls, CRM etc. I have also done what you have asked "**database for company with clients, cases etc**" in fabrik only. You have to dive into deep in case of Fabrik, because Fabrik is not what people expect a drag and drop application builder. It is full custom application builder providing full feature to interact with your any other joomla components like K2, virtuemart etc by creating forms using their existing tables. The other important thing I like in Fabrik, you can schedule your email, custom queries by using cron feature.
You can get simple forms every where but no feature of ajax elements requesting updated data on the fly like in Fabrik. |
17,545 | I am building an internal database application for Joomla using Fabrik.
I'm interested to know if there are any alternatives to Fabrik for me to use. Maybe some of them have more options? In my case, I am making an ERM/CRM (database for company with clients, cases etc etc what my directors required). What would you use in this case? | 2016/08/16 | [
"https://joomla.stackexchange.com/questions/17545",
"https://joomla.stackexchange.com",
"https://joomla.stackexchange.com/users/7952/"
] | I will advise you to make your own component using Joomla MVC and framework.
The learning curve may be big but then you will have absolute freedom to make any change or development you may need.
I told you as a user and admirer of fabrik.
I did lots of development using it but eventually you realize that the dependence on fabrik and its learning curve ultimately not worth it and it is better if you invest your time learning the native way to develop components with Joomla.
If your project is small, maybe, but for a thing as big as a ERM/CRM I will definitely do it as I told you. | I would use CiviCrm: the main logic is implemented and it can be tuned like you want it. Main reason for me is that there is a team that keeps coding new versions and keeps the whole thing up to date, all based on a use history of years.
Main reason not to do this: it is a lot of work to get it running inside Joomla, and you need to get used to the detailed level of customising that is expected. |
17,545 | I am building an internal database application for Joomla using Fabrik.
I'm interested to know if there are any alternatives to Fabrik for me to use. Maybe some of them have more options? In my case, I am making an ERM/CRM (database for company with clients, cases etc etc what my directors required). What would you use in this case? | 2016/08/16 | [
"https://joomla.stackexchange.com/questions/17545",
"https://joomla.stackexchange.com",
"https://joomla.stackexchange.com/users/7952/"
] | Zoo is another alternative. You can use Chronoforms and ChronoConnect. It isn't easy to setup. Chronoforms can't natively do "Join" on databases like Fabrik can. Here is a link to an example of Chronoforms & Connect together.
<https://blog.grimeymedia.com/chronoforms-chronoconnectivity-5-example/> | I would use CiviCrm: the main logic is implemented and it can be tuned like you want it. Main reason for me is that there is a team that keeps coding new versions and keeps the whole thing up to date, all based on a use history of years.
Main reason not to do this: it is a lot of work to get it running inside Joomla, and you need to get used to the detailed level of customising that is expected. |
17,545 | I am building an internal database application for Joomla using Fabrik.
I'm interested to know if there are any alternatives to Fabrik for me to use. Maybe some of them have more options? In my case, I am making an ERM/CRM (database for company with clients, cases etc etc what my directors required). What would you use in this case? | 2016/08/16 | [
"https://joomla.stackexchange.com/questions/17545",
"https://joomla.stackexchange.com",
"https://joomla.stackexchange.com/users/7952/"
] | I will advise you to make your own component using Joomla MVC and framework.
The learning curve may be big but then you will have absolute freedom to make any change or development you may need.
I told you as a user and admirer of fabrik.
I did lots of development using it but eventually you realize that the dependence on fabrik and its learning curve ultimately not worth it and it is better if you invest your time learning the native way to develop components with Joomla.
If your project is small, maybe, but for a thing as big as a ERM/CRM I will definitely do it as I told you. | You can use any JoomlaCCK powerful application such as:
a)Fabrik
b)[Cobalt](http://www.mintjoomla.com/joomla-components/cobalt.html)
c)[Seblod](http://www.seblod.com/) |
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