text large_stringlengths 148 17k | id large_stringlengths 47 47 | score float64 2.69 5.31 | tokens int64 36 7.79k | format large_stringclasses 13
values | topic large_stringclasses 2
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The input tag is used to collect data in web forms and send that data to the web server. The input tag helps the server define the type of data that is being collected and may act in different ways depending upon the type of data it collects.
There are several different types of input tag:
- color (HTML 5)
- date (HTML... | <urn:uuid:53baebfc-a411-4f3c-8593-031384a23c4a> | 3.5625 | 721 | Documentation | Software Dev. | 77.110906 |
Hello Everyone. thanks for all the help. I am close to getting it...
A simplified formula for the hyperfocal length is:
usually d/D is very small so
d= diameter of accepted, maximum circle of confusion (set a priori)
F= focal length of positive lens
D= lens diameter
So, the hyperfocal length is farther out if the focal... | <urn:uuid:4657693f-63f9-490e-a486-4b17e6ac1154> | 2.8125 | 295 | Comment Section | Science & Tech. | 79.656147 |
l = length
w = width
h = height
d = diagonal
S = surface area
V = volume
Enter any 3 variables for a rectangular prism into this online calculator to calculate the other 3 unknown variables. A cube is a special case where l = w = h for a rectangular prism.
* Units: Note that units are shown for convenience but do not a... | <urn:uuid:a7445c3e-6f80-4837-8d11-7850de234d16> | 3.6875 | 328 | Tutorial | Science & Tech. | 73.997296 |
C Programming and C++ Programming
Welcome! Cprogramming.com is your source for everything C and C++!
Learn C and C++
C is a powerful system programming language, and C++ is an excellent general purpose programming language with modern bells and whistles.
Popular articles and tutorials for beginners and experts
Go beyon... | <urn:uuid:5b3d0e2b-ce10-49d2-b054-6a6b202f9460> | 3.09375 | 308 | Content Listing | Software Dev. | 50.651688 |
What is a Concatenative Language
Recently there has been some discussion on the concatenative discussion group about the term "concatenative language" and what it actually means. In this post I provide my definition and attempt to deconstruct it.
The canonical example of a concatenative language is the Joy programming ... | <urn:uuid:52c951b3-c5bf-4be5-b429-a06fb76785c5> | 3.140625 | 1,055 | Personal Blog | Software Dev. | 46.297023 |
Search our database of handpicked sites
Looking for a great physics site? We've tracked down the very best and checked them for accuracy. Just fill out the fields below and we'll do the rest.
You searched for
We found 7 results on physics.org and 42 results in our database of sites
42 are Websites,
0 are Videos,
and 0 ... | <urn:uuid:839d2918-ef55-4378-b089-b14f319414ea> | 2.765625 | 379 | Content Listing | Science & Tech. | 51.406114 |
Welcome to PhysLink.com - Your physics and astronomy online portal. Stay a while! Check out our extensive library of educational and reference materials. Also, check out our fun section!
Is it true that a duck's quack doesn't echo? If so, why?
Asked by: Matt Schonert
I'm sorry to say that it's not true about the quack ... | <urn:uuid:007c39fa-d710-4dd0-a8d7-1b9907f03c47> | 3.296875 | 662 | Q&A Forum | Science & Tech. | 61.32827 |
"All locusts are grasshoppers, but not all grasshoppers are locusts," Greg Sword, an entomologist at Texas A&M University, says. The behavior that separates locusts from their grasshopper brethren is swarming. A single locust isn't worrisome, and locusts like to live alone for most of their lives. But when a group of l... | <urn:uuid:8f172fea-f395-4473-a1af-cf944211cb49> | 3.484375 | 314 | Listicle | Science & Tech. | 43.02962 |
Scientists at DTU Space are engaged in measuring, modelling and scientifically analysing the Earth’s magnetic field.
Scientists are studying the magnetic field to learn more about the Earth’s core, where the field is generated, and to determine how constant variations in the magnetic field affect life on Earth. At the ... | <urn:uuid:de9bb6b0-30bb-401c-aebf-8dc297a79507> | 3.625 | 452 | Knowledge Article | Science & Tech. | 35.710574 |
Powerful, stable, portable and mature, Perl is one of the most feature-rich programming languages with over two decades of development. Perl is portable and cross-platform. At the time of this writing, Perl can runs on over 100 platforms. Perl is good for mission critical large scale projects as well as rapid prototypi... | <urn:uuid:93b40ced-d5b1-4853-87a5-05aedc80ff5c> | 3 | 475 | Knowledge Article | Software Dev. | 43.795803 |
Global Warming! Global Warming!
You can tell who the real scientists are by whether they approach a problem as doomsayers, or whether they try to devise solutions to a problem.
Global warming just may have met its match. In research recently completed at Emory University School of Medicine, scientists have discovered a... | <urn:uuid:5cd2eb9f-ce28-48b2-9ab8-c94f37f8e598> | 3.46875 | 422 | Personal Blog | Science & Tech. | 43.827999 |
Water, while one of the most abundant compounds on the planet and one of the most crucial compounds to life on earth, is one of the oddest. It exhibits physical characteristics that are completely anomalous from other molecules with similar size and structure. This page lists 63 anomalies that water exhibits, ranging f... | <urn:uuid:ba0a578b-26e9-4d53-9a29-556c82c14c12> | 3.734375 | 744 | Nonfiction Writing | Science & Tech. | 35.421202 |
One of the methods of learning PHP that I described in a previous post was to learn by searching for things when you need them. Here’s a guide to using that method.
Using Google as part of the learning process
There are many ways that you can utilize Google, or any other search engine, into your learning process. No ma... | <urn:uuid:55682fb3-9c15-4296-bd14-2352a93f881c> | 2.78125 | 735 | Tutorial | Software Dev. | 64.873871 |
Euclid of Alexandria revolutionized the way that mathematics is written, presented or thought about, and introduced the concept of mathematical proofs. Discover what it takes to move from a loose theory or idea to a universally convincing proof.
Another popular type of proof is a proof by contradiction. This is also kn... | <urn:uuid:1b3aec25-a69e-4c31-8724-8bda9c9582f2> | 4.125 | 319 | Tutorial | Science & Tech. | 48.36141 |
Algorithm::Diff is a Perl module for computing the difference between two files, two strings, or any other two lists of things. It uses an intelligent algorithm similar to (or identical to) the one used by the Unix `diff' program. It is guaranteed to find the smallest possible set of differences.
Apache::Session is a p... | <urn:uuid:3f377fdc-cd3f-4bab-bf96-98fba5e342d2> | 2.71875 | 460 | Content Listing | Software Dev. | 38.245746 |
If the obscuring torus has the same gas-to-dust ratio as in the Galactic ISM, and the dust is characterized a Galactic extinction curve, then the nuclear region of Sy2s should suffer a visual extinction that is related to the gaseous column density by the formula AV = 5 x 10-22 NH (cm-2). In general this is not the cas... | <urn:uuid:90d6b2cf-b4de-4c24-977b-86130b8f2410> | 3.015625 | 844 | Academic Writing | Science & Tech. | 54.506623 |
Mono Lake - For Educators
These Nitzschia cells were found living within detrital material of Mono Lake. Image taken by David Patterson and provided courtesy of the microscope web site.
- Bringing Water To Los Angeles. This case study addresses the issue of freshwater resources in regions around Mono Lake and Owens Val... | <urn:uuid:3d5f0477-3c6b-4513-938c-36a9af1cd263> | 3.234375 | 343 | Content Listing | Science & Tech. | 26.685845 |
Science Fair Project Encyclopedia
- This article is about ether as a general class of chemical compounds. For other meanings, see Ether (disambiguation)
Ether is the general name for a class of chemical compounds which contain an ether group — an oxygen atom connected to two (substituted) alkyl groups. A typical exampl... | <urn:uuid:eb8f4b39-a8bf-41c5-8e93-420c72d8488c> | 3.90625 | 1,058 | Knowledge Article | Science & Tech. | 38.746021 |
Science Fair Project Encyclopedia
For other meanings of diver, also see diving.
In the Authorized Version of the Bible, "divers" often means "diverse, various".
For a place in the Nord département, see Loon-Plage
Loon is also a US singer/rapper.
The loon (N.Am.) or diver (UK) is a type of aquatic bird found in many par... | <urn:uuid:0b9a71d5-f2a6-4ffc-822e-1db74e0ff905> | 3.34375 | 617 | Knowledge Article | Science & Tech. | 49.89431 |
The May 3, 2012 issue of the journal Brain, Behavior, and Evolution tackled an issue which has millions of us humans wondering:
How does the cerebellum of the platypus develop???
Scientists (and I use that term loosely) working (and I use that term loosely too) at the Department of Anatomy, School of Medical Sciences, ... | <urn:uuid:e011b8eb-da2b-46c5-a4c3-89f412294aab> | 3.578125 | 436 | Personal Blog | Science & Tech. | 43.665417 |
exhibit models radioactive decay of nuclei and fundamental particles
with wooden cubes. There are 100+ hardwood cubes each with one
side painted red. These cubes are placed into a wicker bowl and
tossed onto a table. The cubes that land red side up are removed
and placed into one column at the bottom left edge of the t... | <urn:uuid:fe7f7598-f94d-426a-8a6f-7420993d4480> | 3.703125 | 256 | Knowledge Article | Science & Tech. | 50.329011 |
Plant and Animal Cells
An Internet Hotlist on Cells
created by R. Stewart
| Parts of a cell
| Cell Diagrams
| Cell Division
| Tutorials and Activities
You COULD look for books or magazines to find out about Cells, but why not use the power of the Internet instead? The links below will get you started.
The Internet Reso... | <urn:uuid:e8c3182d-e84a-40dd-8f63-89fe15e7e767> | 3.828125 | 540 | Content Listing | Science & Tech. | 41.904076 |
On the same wavelength-- literally
The human brain is bombarded with all kinds of information, from the memory of last night’s delicious dinner to the instructions from your boss at your morning meeting. But how do you “tune in” to just one thought or idea and ignore all the rest of what is going on around you, until i... | <urn:uuid:bdb1f821-ec69-49ce-8919-f916b219bfed> | 3.265625 | 1,434 | Knowledge Article | Science & Tech. | 44.365518 |
The particles command performs some particules analysis on a matrix.
particles performs a thresholding on the matrix and returns the list of the particles found with the following information for each one: its center's coordinates, its area, the dimensions of its minor and major axes, the angle of its major axe, its pe... | <urn:uuid:38d2678b-5ffe-46be-a64c-282451ce5d4c> | 2.71875 | 168 | Documentation | Software Dev. | 36.197856 |
SCapture Class. Last updated: 08/05/2008
Class shared methods:
I created the SCapture class to allow us capture still images from the screen. The SCapture class uses some Api methods to implement the capture. The main reason I used the Api functions such as BitBlt to build the bitmap image because the .Net way of captu... | <urn:uuid:61c27b19-4bdb-4208-bd60-9952a8af3f6b> | 2.6875 | 563 | Comment Section | Software Dev. | 40.977551 |
Q&A: General Astronomy and Space Science
Every picture of a spiral galaxy including our own, depicts a
very bright, spherical center ... I assume a dense cluster of
stars. We can see this bright center in distant galaxies, and
I've always wondered, why we don't see the bright center of our
own. Or, do we, and I don't k... | <urn:uuid:c1711bfd-57a4-4c3c-9f5b-b24657848c6c> | 3.828125 | 294 | Q&A Forum | Science & Tech. | 61.58 |
Atmospheric Pressure I --The Paint Thinner Can
Chemical Concept Demonstrated
After the can is stoppered, it collapses.
The water inside the can is boiled. The water takes up more space as a gas than as a liquid, and this forces much of the air out of the can. When the heat is removed, the water returns to its liquid st... | <urn:uuid:67d37034-d587-4f2e-9316-7f58a698b156> | 3.8125 | 236 | Tutorial | Science & Tech. | 52.550192 |
Climate Change and Debris-Flow Events in Southern Norway
Matthews, J.A., Dahl, S.O., Dresser, P.Q., Berrisford, M.S., Lie, O., Nesje, A. and Owen, G. 2009. Radiocarbon chronology of Holocene colluvial (debris-flow) events at Sletthamn, Jotunheimen, southern Norway: a window on the changing frequency of extreme climatic... | <urn:uuid:ada6d405-ae2d-4770-8868-b4dd01d8d033> | 3.15625 | 783 | Academic Writing | Science & Tech. | 55.661347 |
Geysers are impressive geothermal events where hot water from deep within the earth is periodically pushed through a small vent to the surface, creating a natural fountain. The water is sprayed from the opening up to several hundred feet in the air along with steam and various gases, including carbon dioxide, oxygen, a... | <urn:uuid:6f18d784-5d1a-4ab1-ac87-8a3beff5f9ba> | 3.875 | 1,597 | Knowledge Article | Science & Tech. | 43.547667 |
Cuckoos don't bother building their own nests - they just lay eggs that perfectly mimic those of other birds and take over their nests. But other birds are wising up, evolving some seriously impressive tricks to spot the cuckoo eggs.
Cuckoos are what's known as brood parasites, meaning they hide their eggs in the nests... | <urn:uuid:561756ef-f2a6-4dad-b1e3-26d77ab0a41c> | 3.46875 | 521 | Truncated | Science & Tech. | 49.100089 |
As far as labels matter.
The NOAA report abstract is below. The report is here.
Sandy was a classic late-season hurricane in the southwestern Caribbean Sea. The cyclone made landfall as a category 1 hurricane (on the Saffir-Simpson Hurricane Wind Scale) in Jamaica, and as a 100-kt category 3 hurricane in eastern Cuba b... | <urn:uuid:010b8873-57ff-43ad-88e9-824d81cc2b33> | 2.75 | 314 | Knowledge Article | Science & Tech. | 37.587969 |
|Next stop: Mars.
This past weekend the
Mars Science Laboratory carrying the Curiosity Rover
for the red planet atop an
Atlas V rocket from
At five times the size of the Opportunity rover
currently operating on Mars,
Curiosity is like a
strange little car with six small wheels, a head-like camera mast, a rock crusher, ... | <urn:uuid:c4e1efce-04bd-4018-b26f-841a80568fc1> | 2.921875 | 140 | Content Listing | Science & Tech. | 29.295 |
Dr. Mary Schweitzer, assistant professor of paleontology with a joint appointment at the N.C. Museum of Natural Sciences, has succeeded in isolating soft tissue from the femur of a 68-million-year-old dinosaur. Not only is the tissue largely intact, it's still transparent and pliable, and microscopic interior structure... | <urn:uuid:f7dd7cfc-13cf-4119-97bd-f135372d4eb4> | 3.5625 | 332 | Truncated | Science & Tech. | 31.923137 |
Multiple inheritance means that a class
can have multiple superclasses and inherit from them.
Multiple inheritance can cause several problems:
- Name conflicts of instance variables.
- Methods with the same name from multiple parents.
- Instance variables no longer have simple constant offsets.
Variations of inheritanc... | <urn:uuid:28eb9019-768b-4cd3-99f1-7dbc5d9d2da4> | 3.6875 | 143 | Knowledge Article | Software Dev. | 33.771865 |
String Theory: Two Types of Branes Are One
At energy levels where predictions from string theory and general relativity match up, D-branes and p-branes are equivalent. Though Polchinski was aware of Strominger’s work on p-branes — they discussed their projects over lunch regularly — both scientists thought that the two... | <urn:uuid:2f9a1808-328b-46df-bfbf-f3ef9d0fe759> | 2.953125 | 525 | Truncated | Science & Tech. | 43.624167 |
Engaging, exciting, awe-inspiring. Words don’t do justice to this video from TED-Ed. If anyone can generate enthusiasm about ocean exploration, Robert Ballard can. His enthusiasm is palpable and his presentation filled with excitement and humor.
Ocean Explorer Ballard brings questions to light, asking why NASA’s (Natio... | <urn:uuid:40158820-bfc2-47e0-a152-b51bab6f701c> | 3.171875 | 214 | Truncated | Science & Tech. | 38.320227 |
A copper wire with a bifilar winding that has the opposing magnetic fields cancel each other.
Take a enamel copper wire and nick the middle then twist the wire into a double helix.
Now curl the wire into a spiral. This will generate scalar waves when there is a current.
It is believed that scalar waves have strange eff... | <urn:uuid:f6a1fa6e-e35f-414f-9710-57aa106b506e> | 3.015625 | 352 | Knowledge Article | Science & Tech. | 52.005063 |
Hydrogen and Fluorine
Early in 1949 William L. Doyle, a chemist engaged in rocket propellant research at North American Aviation, made a deal with Herrick Johnston. Doyle would come to work at the Ohio State University Rocket Laboratory if given a free hand to investigate the performance of liquid hydrogen with his fa... | <urn:uuid:f6b893b0-2e58-4246-a799-77aeaeae7977> | 3.515625 | 1,137 | Knowledge Article | Science & Tech. | 39.482274 |
DRIVING in the dark is about to get safer. Intelligent versions of the familiar reflecting Catseye could soon be embedded in the highway, marking out the road more than 10 times farther ahead and warning drivers of dangerous conditions.
The Intelligent Road Studs, developed by Astucia, a company in Retford, Nottinghams... | <urn:uuid:af2cfc27-5e75-4cbc-9884-2e76fdb85682> | 3.328125 | 216 | Truncated | Science & Tech. | 54.834408 |
Lars Jensen photo
Lake Superior greatly ameliorates temperature extremes, slowing spring warming and the onset of winter. The average date of the last freezing temperature in spring is June 8, and the average first fall freeze is September 23; however, freezing can occur during any month. The freeze-free period, or gro... | <urn:uuid:46b703d8-6da1-4971-9523-302ce7d497c7> | 3.578125 | 409 | Knowledge Article | Science & Tech. | 41.160708 |
|Dec22-12, 07:33 AM||#1|
Do all substances boil?
If no, which ones do not? If yes, is there a theoretical proof that a counterexample is impossible?
Most substances have a fluid phase which is a single phase at pressures above critical point pressure - but two separate phases at lower pressures. The solid sublimates in... | <urn:uuid:675cf148-073b-42ee-82a8-cfeca96e771c> | 2.71875 | 439 | Comment Section | Science & Tech. | 56.473729 |
C++ Program to Read a Set of Lines
This is a program to read a set of lines and find out the number of characters, word and lines in a given text and display each word of the text in different lines.
Void main ()
Int i=0, linecount=1, wordcount=1;
Char str ;
Cout<<”\n Enter the lines”;
Cin.get (str, 100, ‘#’);
If (str[... | <urn:uuid:4c4e2c6d-6576-4637-be10-3fac869bc1d1> | 3.9375 | 364 | Content Listing | Software Dev. | 91.364375 |
Taking a Clue from Nature
Though weinberg and his colleagues at Symyx are the first to try to commercially apply combinatorial techniques to materials research, they didn’t invent the process. In fact, they were beaten out by a few billion years by a very creative innovator: Evolution. Cells have the ability to create ... | <urn:uuid:f59cbec8-7e84-4ea6-98b9-4a8a514876a2> | 3.40625 | 594 | Nonfiction Writing | Science & Tech. | 36.60908 |
Next: 6.3.2 Creating a FIFO
Up: 6.3 Named Pipes (FIFOs
Previous: 6.3 Named Pipes (FIFOs
A named pipe works much like a regular pipe, but does have some noticeable
- Named pipes exist as a device special file in the file system.
- Processes of different ancestry can share data through a named pipe.
- When all I/O is don... | <urn:uuid:bbfd5e35-1bea-4e29-a87f-eb3e56e54ac2> | 3.171875 | 121 | Documentation | Software Dev. | 71.783571 |
Want to stay on top of all the space news? Follow @universetoday on Twitter
One of the mysteries of Earth science is hotspots. While most volcanoes are found at plate boundaries, where two tectonic plates are rubbing against each other, volcanic hotspots can be anywhere, even in the middle of continents. What causes vo... | <urn:uuid:91b603ce-acdc-4342-bb6a-a1bc1a846bd7> | 4.34375 | 471 | Truncated | Science & Tech. | 56.091455 |
Create a drop-down list with four options:
The <select> tag is supported in all major browsers.
The <select> element is used to create a drop-down list.
The <option> tags inside the <select> element define the available options in the list.
Tip: The <select> element is a form control and can be used in a form to collec... | <urn:uuid:3a65d451-3494-448e-90f5-45a3eedf579a> | 3.125 | 291 | Documentation | Software Dev. | 45.062917 |
The role of crustal quartz in continental tectonism...
Gravity, surface heat flow and EarthScope seismic data are combined in a new tool for measuring the averaged abundance of quartz in the Earth's crust... And the results are surprising.
Slow fault slip after the 2004 M9.3 Sumatra- Andaman earthquake
The 2004 earthqu... | <urn:uuid:33ae84ee-1771-4886-a647-28f15f28b89d> | 2.96875 | 560 | Content Listing | Science & Tech. | 56.120082 |
Question: What are the main risks posed by the genomics revolution?
Juan Enriquez: So, anytime you bring a really powerful new technology to market there are multiple implications. You start changing the relative position of countries. When you brought the Industrial Revolution in, all of a sudden India and China went ... | <urn:uuid:480dc9c3-b38b-4b50-8ef7-f90ca11c55e3> | 2.796875 | 941 | Audio Transcript | Science & Tech. | 50.193013 |
Detritivores, also known as detritophages or detritus feeders or detritus eaters or saprophages, are heterotrophs that obtain nutrients by consuming detritus (decomposing plant and animal parts as well as organic fecal matter). By doing so, they contribute to decomposition and the nutrient cycles. They should be distin... | <urn:uuid:f591aa14-41d0-4dbf-86d4-c0977c39e017> | 4.09375 | 799 | Knowledge Article | Science & Tech. | 34.156105 |
common name: an antlion
scientific name: Glenurus gratus (Say) (Insecta: Neuroptera: Myrmeleontidae)
Introduction - Distribution - Identification - Biology - Detection and Survey - Economic Importance - Selected References
Antlions are common, conspicuous insects in Florida. Florida has the richest antlion fauna in the... | <urn:uuid:42fba03e-5e93-4346-b6aa-0dfe54d8eed2> | 3.265625 | 1,487 | Knowledge Article | Science & Tech. | 44.953759 |
Brief SummaryRead full entry
BiologyA gregarious bird, but less so than some other penguin species (2), the gentoo can form breeding colonies ranging from thirty to thousands of pairs (5). Arriving at suitable nesting ground between June and November (the exact date depending on the location) (2), each pair of penguins... | <urn:uuid:b4e35715-d3a2-44c8-bdf2-7dc5f24c0e0b> | 3.484375 | 367 | Knowledge Article | Science & Tech. | 48.887094 |
Jan 9, 2000, 10:11 PM
Post #2 of 3
Actually, you can also use the first example you wrote on Win32:
$path = "/home/www/blah";
From "Learning Perl on Win32 Systems" Chapter 10.3 - Using Pathnames and Filenames:
"The only portable delimiter is the slash. Of course, if you're using drive letters, your script isn't really ... | <urn:uuid:6953955b-b4e6-473e-939d-b3c5dbf2bf25> | 2.875 | 347 | Comment Section | Software Dev. | 58.624292 |
The Bad Astronomer writes "Using real data from Hubble Space Telescope of a planet orbiting another star, exoplanetary scientist Frédéric Pont created a lovely image of what sunset would look like from HD209458b, nicknamed Osiris, a planet 150 light years away. The Hubble data gave information on the atmospheric absorp... | <urn:uuid:ccd394ec-3dbb-49aa-bffb-3b219bbbb6fd> | 3 | 141 | Comment Section | Science & Tech. | 41.800793 |
This is a collection of websites and internet resources that are hand-picked for teaching hydrogeology at the undergraduate level. If you have an internet resource or website you would like to share, please let us know.
Subject: Ground Water
- 4 matches General/Other
- Geology of groundwater occurrence
- Water cycle/gr... | <urn:uuid:2ed8c8f6-9f53-4e0b-8409-35d48827d6a4> | 3.265625 | 492 | Content Listing | Science & Tech. | 28.766094 |
Students compare known elemental spectra with spectra of Titan and Saturn's rings from a spectrometer aboard the NASA Cassini spacecraft. They identify the elements visible in the planetary and lunar spectra.
Prior Knowledge & Skills
AAAS Science Benchmarks
The Physical Setting
The Nature of Science
NSES Science Standa... | <urn:uuid:74609cb0-93be-477e-8bff-83c847675c08> | 3.859375 | 2,113 | Tutorial | Science & Tech. | 39.936392 |
Temperatures have increased both over land and water. Some of the heat from global warming gets stored in the world’s oceans causing higher water temperatures near the surface. This figure shows the trend in the heat content of the ocean between the surface and 700 meters deep. Warming of the oceans has many consequenc... | <urn:uuid:b6b6a321-dc9f-4577-912c-06c973f846b8> | 3.765625 | 114 | Knowledge Article | Science & Tech. | 40.285882 |
The Binary Compatibility Problem
Again, there is no standard C++ ABI. Different compilers (and even different versions of the same compiler) produce different object files and libraries. The most obvious manifestation of this problem is the different name mangling algorithms implemented by different compilers. This mea... | <urn:uuid:54809bd2-6806-47be-aeee-ca64d27b23cd> | 2.765625 | 804 | Documentation | Software Dev. | 37.577599 |
Source: http://www.popsci.com/science/articl...laws-space-yetOnly a few. Right now, the roughly 20,000 man-made objects orbiting the Earth are less regulated than the cars on a morning commute. Satellites are usually on a fixed path, so the traffic control comes prelaunch. Most can move slightly to maintain orbit, but ... | <urn:uuid:6a2daff9-db19-4c3a-8e85-25f13d785e55> | 3.6875 | 320 | Comment Section | Science & Tech. | 43.974951 |
Have you read the Scanner class's API doc? Do you have any questions about the descriptions there of those two methods?
Please post your questions here.
A token is a string of non blank characters surrounded by white spaces.
The current line ends with a newline character.
Can you post the program you are having trouble... | <urn:uuid:9f66e6c0-c9b8-464a-a678-044f81ce5ebc> | 2.984375 | 124 | Q&A Forum | Software Dev. | 64.467619 |
Earth's forests are breathtaking. In fact, trees are effectively the greatest carbon dioxide warehouses to have ever evolved on Earth. For every metric ton of wood created, 1.5 metric tons of carbon dioxide are absorbed and 1 metric ton of oxygen released.
Frighteningly, Earth's forests are dying from a warming world. ... | <urn:uuid:63749515-cb25-4d07-86ae-cbce4d0f509a> | 3.609375 | 1,012 | Nonfiction Writing | Science & Tech. | 41.465783 |
Incorporating Climate Change into Conservation
The National Wildlife Federation (NWF) and Manomet Center for Conservation Sciences (Manomet), received funding from the Wildlife Conservation Society in September 2010 to help the conservation community in the Northeast implement on-the-ground climate-smart restoration an... | <urn:uuid:9ce7fdb4-aadf-423a-8df7-32cf2fe97b16> | 3 | 600 | Content Listing | Science & Tech. | 24.194172 |
When James Hack came to Oak Ridge National Laboratory in late 2007, he was given two hats: one as the director of ORNL's National Center for Computational Sciences and the other as leader of ORNL's laboratory-wide climate science effort.
In one role, he guides the world's foremost open science supercomputing center. As... | <urn:uuid:bb5bf013-07a4-4d9a-a643-481fc47e48dc> | 2.9375 | 1,457 | Audio Transcript | Science & Tech. | 35.02972 |
Basic Terminology and Concepts<
Learn about the wealth of natural resources associated with energy.Flickr Physics
Visit The Physics Classroom's Flickr Galleries and enjoy a visual overview of the topic of work, energy and power.Particle Physics
Learn about the energy of small particles like those studied by particle ph... | <urn:uuid:51462d98-b174-47c0-b266-5819ea5c9ba4> | 4.21875 | 720 | Tutorial | Science & Tech. | 47.279196 |
On 16-12-2010, in Picture stories, by phil
The wind and the general flow of air and ocean currents around our planet is of great importance to aviators and sailors alike. It is often hard to visualise exactly what is going on. Satellite pictures can show us a lot, not only for illustrating the weather forecasts we all ... | <urn:uuid:8ad4706e-b583-4b9e-ad7e-35011fc299a4> | 3.484375 | 1,211 | Personal Blog | Science & Tech. | 43.243735 |
Could nanomaterials hold the answer to reversing the effects of UV radiation?
By Sherrie Negrea
The link between sunlight and skin cancer is widely accepted — the absorption of ultraviolet radiation can damage skin cells. Exactly how the sun’s radiation breaks down the DNA within cells is a process that Changhong Ke, a... | <urn:uuid:b3132479-2c06-4804-81d2-311b8d98a5ff> | 3.25 | 1,010 | Nonfiction Writing | Science & Tech. | 32.642573 |
There are three resident killer whale populations found between Washington state and Alaska. These whales are called residents, because they spend about half of the year foraging in inland waters, and rely almost exclusively on salmon as prey. The southern resident killer whales (SRKW) are the most threatened populatio... | <urn:uuid:c26bd81b-0087-4cf5-a318-215af20ef96b> | 3.328125 | 1,532 | Academic Writing | Science & Tech. | 40.591014 |
Sticky and blunt ends
||This article relies largely or entirely upon a single source. (June 2009)|
DNA end or sticky end refers to the properties of the end of a molecule of DNA or a recombinant DNA molecule. The concept is important in molecular biology, especially in cloning or when subcloning inserts DNA into vector... | <urn:uuid:9f37938d-51ad-4fdd-91bd-b408bda81be8> | 4.03125 | 1,150 | Knowledge Article | Science & Tech. | 38.543541 |
Brief SummaryRead full entry
North American Ecology (US and Canada)Polites origenes is a year-round resident in the eastern United States and into southern Canada (Scott 1986). Habitats are Gulf Coast to transition zone dry meadows (damp meadows eastward), open woodland and prairie. Host plants are grasses, with most k... | <urn:uuid:00caa329-7629-44f7-9bad-2ebb3f0640ac> | 2.75 | 145 | Knowledge Article | Science & Tech. | 50.198962 |
Magnetic Portals Found In Earth's Atmosphere
I almost posted this in another forum site because it opens up all kinds of interesting thoughts...
Magnetic Portals Found in Earth’s Atmosphere
July 3rd, 2012
– Science-fiction writers have toyed with the concept of a portal for many years, and scientists have been trying t... | <urn:uuid:886fe09d-21e2-4932-a012-f304f5a9c8dd> | 2.828125 | 562 | Comment Section | Science & Tech. | 36.823622 |
5.5. Surface Brightness of Single and Double Galaxies
One of the general indicators of galactic structure is the mean surface brightness, B. This may be measured by various techniques depending on the chosen isophotal diameter system. The values of surface brightness presented in Appendix 2 are determined from
In other... | <urn:uuid:000725e0-823f-4a22-8fbd-c1e9c11b2668> | 3.53125 | 1,800 | Academic Writing | Science & Tech. | 36.996355 |
Historically, the term Tesla principle was used to describe (amongst other things) certain reversible processes invented by Nikola Tesla.Electrical Experimenter, January 1919. p. 615. However, this phrase is no longer in conventional use. It was developed during Tesla's research in alternating currents where the curren... | <urn:uuid:57620529-03c1-45a1-9ce1-1d0fcaae7fdc> | 3.890625 | 188 | Knowledge Article | Science & Tech. | 34.140512 |
FEROCIOUS STORMS AND DROUGHT SEEN
December 07, 1988
Dr. Hansen cited a model prepared by another scientist, Dr. Kerry Emmanuel, showing that the global warming trend is likely to intensify the severity of storms. He said the warming of the ocean would speed evaporation, which would cause more active convection currents... | <urn:uuid:fc81c539-72be-4de3-a54e-d36fbc9572c0> | 3.21875 | 369 | Personal Blog | Science & Tech. | 47.542755 |
In the http module HTTP exception classes and status codes are defined.
- exception Failure(message='Bad request', status=http.BAD_REQUEST)¶
A base class of errors which should be reported to a user by a HTTP response with the status code status and message in the content. Whenever your application faces a problem it h... | <urn:uuid:996735d6-9c00-47ce-8b93-2721be2577cf> | 2.921875 | 537 | Documentation | Software Dev. | 47.923457 |
Is it possible to create a rocket with a variable blast diameter to achieve different levels of torque and power similar to a geared transmission?
I suppose the best analogy I have is the difference in power between a garden hose normally and when you plug it with your thumb, creating more pressure.
Would it be possibl... | <urn:uuid:355c3750-de41-4975-a7c3-b2ea511d7924> | 2.78125 | 426 | Q&A Forum | Science & Tech. | 56.151471 |
For correctly rounded decimal to floating-point conversions, many open source projects rely on David Gay’s strtod() function. In the default rounding mode, IEEE 754 round-to-nearest, this function is known to give correct results (notwithstanding recent bugs, which have been fixed). However, in the less frequently used... | <urn:uuid:a86569a7-a72e-43bb-a8e0-eae7ad6476b9> | 3.140625 | 489 | Personal Blog | Software Dev. | 39.7075 |
|Euclidean norm||computing dictionary|
<mathematics> The most common norm, calculated by summing the squares of all coordinates and taking the square root. This is the essence of Pythagoras's theorem. In the infinite-dimensional case, the sum is infinite or is replaced with an integral when the number of dimensions is ... | <urn:uuid:cda7139a-76ba-451a-a6f7-8c6b61bb2c9e> | 3.21875 | 98 | Knowledge Article | Science & Tech. | 34.487917 |
Scientists at the Fish and Wildlife Research Institute (FWRI) have been developing habitat suitability models that predict spatial distributions and relative abundance of fish and invertebrate species in Florida estuaries.
Habitat Suitability Index (HSI) modeling was developed by the U.S. Fish and Wildlife Service (USF... | <urn:uuid:e8dcaf08-6e0c-4355-a233-f4dac34592aa> | 3.3125 | 1,288 | Academic Writing | Science & Tech. | 44.01484 |
If is an idempotent in a ring (not necessarily with identity), then we can decompose as the direct sum of four components (subrings), each of them related to . Concretely,
note that here is just notation that means , and similarly for .
This decomposition is known as the Peirce decomposition of with respect to .
An imp... | <urn:uuid:2a18f2a0-df7a-4218-89df-958e63fcadee> | 3.046875 | 904 | Documentation | Science & Tech. | 37.177636 |
For nearly 30 years, jewel beetles (family Buprestidae) have been my primary research interest. While some species in this family have long been regarded as forest and landscape pests, my interest in the group has a more biosystematic focus. A faunal survey of Missouri was the result of my initial efforts (MacRae 1991)... | <urn:uuid:477a0210-1103-41f0-a397-59fe902b3056> | 2.796875 | 2,914 | Personal Blog | Science & Tech. | 51.32602 |
M-type asteroids were once known as metallic asteroids. Today their composition is in dispute, and many astronomers simply define the M type by a reflected spectrum and make no attempt to define a common composition for all of them. About 8% of all asteroids are of this type.
Characteristics and composition
Originally ... | <urn:uuid:54d5dffe-5b60-4f02-ba1a-12767b4a3616> | 3.609375 | 751 | Knowledge Article | Science & Tech. | 76.456111 |
Let's see how this comes up.
Black holes are not black, they are actually invisible and the only way to "see" one is to look at how the stars around it shift.
Let me explain
A black hole bends any light that gets near it. If light from a star behind it is bent, it would appear as if the light came from a different dire... | <urn:uuid:393274bd-2266-42f5-bbc3-1dcc0939e0d5> | 2.90625 | 94 | Comment Section | Science & Tech. | 72.155 |
Floral signs go electric
Flowers' methods of communicating are at least as sophisticated as any devised by an advertising agency, according to a new study, published February 21 in Science Express by researchers from the University of Bristol. However, for any advertisement to be successful, it has to reach, and be per... | <urn:uuid:fdaa8c36-a7cd-42be-a8b5-f6cc029dccbf> | 3.359375 | 1,098 | Truncated | Science & Tech. | 31.947059 |
Climate models are certainly improving, albeit more slowly than many would hope for. They are far from perfect.
Paul Valdes from Bristol University has an interesting paper in the last issue of Nature Geosciences about the reliability of climate models. He basically claims that climate models fail to reproduce past cli... | <urn:uuid:a428c162-e6cc-4ec4-a21d-4a3e244ca4cc> | 2.90625 | 130 | Comment Section | Science & Tech. | 46.321786 |
It might surprise Western scientists to learn that there were periods in Korean history when the level of scientific achievement was the highest in Asia. This is the proposition that Dr. Sang-woon Jeon sets forth in the first comprehensive and systematic survey of Korean science to appear in any Western language. Dr. J... | <urn:uuid:ebcccffa-28e4-4338-a7c3-5156806a61ac> | 2.921875 | 191 | Academic Writing | Science & Tech. | 31.465782 |
I am confused about the concept of 'back emf'.
Have you got a clear, concise and logical explanation of just what it is?
Hi, Ben !!
Well, as you probably already heard before, the back-emf is
the same as counter emf (cemf). It is a voltage produced in
a conductor that tends to neutralize the present voltage. It is
a ph... | <urn:uuid:7fece38c-4fcb-4a0b-a284-487a94082195> | 3.25 | 1,090 | Q&A Forum | Science & Tech. | 58.437497 |
Electron vs Quark Size
Name: Tania N.
If a proton/neutron is very much larger than an electron,
is a quark bigger or smaller than an electron? -- Question from one of
my little year seveners. (grade~2)
A quark has never demonstrated any measurable size. Like an electron, it is
a "fundamental particle", one of the few p... | <urn:uuid:072b32dd-5e6e-49de-92c1-97d3f8369d6d> | 3.21875 | 481 | Q&A Forum | Science & Tech. | 49.088182 |
The OMPS AI shows dust from the Sahara over northern Africa that is being blown over the Atlantic (with yellow, less opaque colors representing less dust and pink, more opaque colors representing more dust). Dust can also be seen over Saudi Arabia and parts of Iran, Afghanistan, and Pakistan. However, the aerosol index... | <urn:uuid:a5ebf218-460b-45af-b956-1ae3e04acf05> | 3.171875 | 172 | Truncated | Science & Tech. | 49.904981 |
April 5, 1999
Eight years ago today NASA launched the Compton Gamma Ray Observatory. While the CGRO has revolutionized our understanding of cosmic gamma ray bursts, these distant explosions remain one of the biggest mysteries of modern astrophysics.
Aug. 10, 1999
Serious eclipse science is planned near home of legendar... | <urn:uuid:64f48a1a-4e75-41a4-8f12-434ef2a681cd> | 3.1875 | 371 | Content Listing | Science & Tech. | 59.380161 |
Indeed, every bit of your being, every gene in your genome, every base pair in your DNA, is no longer extant.
Or is it?
Well, scientists have recently taken a bit of DNA called Col2A1, gleaned from the extinct Tasmanian tiger (Thylacinus cynocephalus), extracted from 100 year-old museum samples, put that DNA in a mouse... | <urn:uuid:d644df19-d63c-46d1-9423-b75e23dcd332> | 3.71875 | 647 | Personal Blog | Science & Tech. | 57.059912 |
Salt Marshes Under Siege
Agricultural practices, land development and overharvesting of the seas explain complex ecological cascades that threaten our shorelines
In North America, salt marshes once lined much of the Atlantic coast. Such a collection of salt-tolerant plants protects the shoreline from storms and filters... | <urn:uuid:0645f765-671c-46a4-bdf5-26e678570279> | 3.265625 | 185 | Truncated | Science & Tech. | 28.625348 |
How did Pluto form (is it an asteroid or a planet?)
Written by Edo Loenen and Marco Westerkamp.
Pluto was discovered in 1930 by Clyde W. Tombaugh, who used a 33-cm photographic telescope at Lowell Obersvatory in Flagstaff, Arizona. The search for Pluto at Flagstaff had been initiated by the founder of the obervatory, P... | <urn:uuid:8409277d-9ef2-4c3e-8603-afe465416762> | 3.796875 | 1,480 | Q&A Forum | Science & Tech. | 49.124638 |
|Themes > Science > Chemistry > Miscellenous > Help file Index > kinetics > Rate constants and order of a reaction|
If the power m or n is zero, then the reaction is 0th order in that species. m or n = 1 means the reaction is first order, 2 means 2nd order, and so on.
Example: a reaction has the rate expression rate = ... | <urn:uuid:432065b3-fb55-43ac-b592-6ea57cc289d8> | 4.03125 | 324 | Tutorial | Science & Tech. | 45.059848 |
Logging is a critical technique for troubleshooting and maintaining software systems. It's simple, provides information without requiring knowledge of programming language, and does not require specialized tools. Logging is a useful means to figure out if an application is actually doing what it is supposed to do. Good... | <urn:uuid:56256b2c-4f36-4bc1-a706-1bb6ee4804f6> | 2.8125 | 895 | Documentation | Software Dev. | 31.651443 |
fundamentals of physics
THE LAW OF INERTIA
The tendency of a body to continue in its state of rest or of uniform motion in a straight line even when some external unbalanced force is applied is called Inertia. Mass is the measure of Inertia of a body.
Inertia is of two types namely:-
1. Inertia of rest
2. Inertia of mo... | <urn:uuid:e9de5532-0fc4-471c-8cee-d7cfd839b0de> | 4.125 | 326 | Q&A Forum | Science & Tech. | 66.636406 |
Ryan Nichol, who works upstairs from me at UCL, gets together with NASA every now and then and flies a balloon around the Antarctic.
They are looking for the answer to one of the great questions in astrophysics. We know that there are really really high energy particles hitting the Earth all the time from outer space. ... | <urn:uuid:b57e7e57-3a44-4b33-b750-e0630d1f95f1> | 2.96875 | 507 | Personal Blog | Science & Tech. | 48.04926 |
Pure Appl. Chem., 2012, Vol. 84, No. 7, pp. 1669-1672
Published online 2012-06-26
INORGANIC CHEMISTRY DIVISION
Names and symbols of the elements with atomic numbers 114 and 116 (IUPAC Recommendations 2012)
Abstract: A joint IUPAC/IUPAP Working Party (JWP) has confirmed the discovery of the elements with atomic numbers ... | <urn:uuid:34a2e219-1f2d-42df-a19f-0126bb229f45> | 2.703125 | 189 | Academic Writing | Science & Tech. | 61.030025 |
What is this DNA stuff?
If you've never heard of DNA, first read http://en.wikipedia.org/wiki/Dna and maybe pick up a textbook for the basics.
The critical things you should understand before trying to do this tutorial:
- DNA is a chemical entity, but we represent its sequence in the computer
- DNA is made of 4 deoxyri... | <urn:uuid:52ad8c44-f7fa-457e-a240-8dd90933c87b> | 4.3125 | 488 | Tutorial | Science & Tech. | 37.310446 |
Effects of fertilisation on phosphorus pools in the volcanic soil of a managed tropical forest
Meason, D. F., Idol, T.W., Friday, J.B. and Scowcroft, P.G. 2009. Forest Ecology and Management 258: 2199- 2206.
Request A Paper
If you would like a copy of this paper, we can send it directly to your inbox! Just fill out the... | <urn:uuid:5b876b96-893e-4c04-8c21-137ba33fb1b9> | 2.703125 | 361 | Academic Writing | Science & Tech. | 54.33413 |
Written by Jonathan Wojcik
While commonly confused with the jellyfish and other Cnidaria, the comb jellies belong to their own distinct phylum, the Ctenophora, believed to be one of the planet's oldest and most basal forms of animal life. They are so named for their comb-like rows of beating cilia, which may appear bri... | <urn:uuid:86f5fa66-c733-4715-b9b9-e09e6c817e92> | 3.90625 | 976 | Personal Blog | Science & Tech. | 31.293276 |
Drought 2008 (updated November 13, 2008)
As of November 11, the U.S. Drought Monitor placed many Minnesota counties in the D0 - Abnormally Dry category or worse (see map at right). Portions of the state, most notably southeastern Minnesota, were placed in the D1 - Moderate Drought classification.
The dry conditions wer... | <urn:uuid:95cdc545-9f5e-4b9d-b76a-2f7370025d28> | 2.921875 | 510 | Knowledge Article | Science & Tech. | 30.695413 |