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Last week in Singapore, Rick Rashid, Microsoft Senior Vice-President (Research) highlighted how computer science theories (and not just computers) are increasing scientists’ arsenal to fight the HIV virus. Below is an extract from the interview “Microsoft takes computer science into fight against HIV“.
Computer science... | <urn:uuid:86ad5c5d-d496-4dc6-a97c-afcd4a674132> | 3.03125 | 379 | Personal Blog | Science & Tech. | 28.455189 |
In Part III, we saw how the current state of the art in Haskell type-level programming leaves some things to be desired: it requires duplicating both data declarations and code, and even worse, it’s untyped. What to do?
Currently, GHC’s core language has three “levels”:
- Expressions: these include things like term var... | <urn:uuid:186c2f30-6289-4cff-b2ff-a42d637ee2a9> | 2.765625 | 1,084 | Personal Blog | Software Dev. | 51.411045 |
Protein tertiary structure
||This article has multiple issues. Please help improve it or discuss these issues on the talk page.
In biochemistry and molecular biology, the tertiary structure of a protein or any other macromolecule is defined by its three-dimensional structure through its the atomic coordinates. Tertiary... | <urn:uuid:f5b386d1-ebe1-4756-be4a-c3b30cca75e2> | 3.015625 | 2,186 | Knowledge Article | Science & Tech. | 29.913927 |
Lowell's astronomers carry out research in areas spanning much of modern astrophysics, from studies of tiny icy objects in our own solar system to the structure of distant galaxies. Meet our scientists and learn more about our diverse programs here.
Solar and Stellar Activity Cycles
Wes Lockwood, Jeffrey Hall, and Bria... | <urn:uuid:7b5a2076-7997-449c-b40a-ae6d1015b026> | 2.953125 | 346 | Content Listing | Science & Tech. | 47.844373 |
A report on the annual meeting of the Society of Developmental Biology, Madison, Wisconsin, USA, 21-24 July 2002.
The introduction of new concepts and of new techniques is equally important in advancing scientific research; ideally, they push each other forward. The talks at the recent Society for Developmental Biology... | <urn:uuid:c4d7de89-c343-4aa6-8681-dc6652ca179f> | 3 | 1,963 | Academic Writing | Science & Tech. | 23.828861 |
In offering this book to teachers of elementary chemistry the authors lay no claim to any great originality. It has been their aim to prepare a text-book constructed along lines which have become recognized as best suited to an elementary treatment of the subject. At the same time they have made a consistent effort to ... | <urn:uuid:9df1451e-5ba8-4b89-87e3-1025945a334c> | 3.28125 | 281 | Truncated | Science & Tech. | 42.129775 |
"Math Chat" began as a live phone-in TV show in the USA, spawned a newspaper column and a website, and now it has produced a book. The whole project was the brainchild of Williams' College mathematician Frank Morgan and has both stimulated interest in maths across a broad range of the community and led to the formation... | <urn:uuid:0b5a5d79-6436-4930-9713-c4925040ba5c> | 3.109375 | 226 | Content Listing | Science & Tech. | 31.6492 |
5 Written Questions
5 Matching Questions
- What is the periodic table?
- Alkali Metals
- What is the periodic law?
- a is an aton or group of bonded atoms that has a positive or negative charge
- b group 17 elements that react vigorously with most metals to form salts
- c the physical and chemical properties of the ele... | <urn:uuid:335ccda7-ea1b-42f8-909b-5354716d35f0> | 3.78125 | 324 | Q&A Forum | Science & Tech. | 30.153018 |
In the 1830s, at the peak of the canal-building era, hydropower was used to transport barge traffic up and down steep hills using inclined plane railroads. For direct mechanical power transmission industries that used hydropower had to be near the waterfall. For example, during the last half of the 19th century, many g... | <urn:uuid:ac60fcbc-967b-4830-8061-61d5589687d6> | 3.84375 | 1,112 | Knowledge Article | Science & Tech. | 27.135236 |
A hot wind constantly buffets Earth and the other bodies of the solar system: the solar wind. It's a flow of electrically charged particles from the Sun. It blows steadily at a million miles an hour or more, with gusts of more than twice that.
When the solar wind hits Earth, it triggers some impressive effects. It crea... | <urn:uuid:18b09402-09a9-4c47-bdfd-62aa3094f2fa> | 4.09375 | 301 | Truncated | Science & Tech. | 52.825057 |
Episode 705: Cosmology
Cosmology is the study of the origins, history and future of the universe. The currently favoured model is the big bang.
- Discussion: The hot big bang (10 minutes)
- Discussion: How old is the universe? (10 minutes)
- Student questions: The age of the universe (20 minutes)
- Discussion: Cosmic m... | <urn:uuid:1993b933-798d-4809-a70f-59aa508036bf> | 3.625 | 978 | Content Listing | Science & Tech. | 42.87779 |
A dynamic-link library (DLL) is a module that contains functions and data that can be used by another module (application or DLL). In Linux/UNIX, the same concept is implemented in shared object (.so) files. From now on, I use the term shared libraries to refer to DLL and SO files.
Advantaged of using shared libraries ... | <urn:uuid:d5d6b7dc-511b-43a5-91f0-2be6d8a28a0e> | 3.359375 | 2,893 | Documentation | Software Dev. | 47.379088 |
Chapters 18 - Global Climate Change
I. Central Case: Rising Temperatures and Seas May Take the Maldives Under
A. A nation of low-lying islands, or atolls, in the Indian Ocean, the Maldives is known for its spectacular tropical setting, colorful coral reefs, and sun-drenched beaches.
B. Nearly 80% of the Maldives= land ... | <urn:uuid:841bf080-4e5e-42dd-83f1-5d6f69fe290e> | 4.0625 | 2,505 | Academic Writing | Science & Tech. | 45.404144 |
Tricks With Torque
To demonstrate torque in a simple system.
Spool with two strings attached to a handle
To start make sure that the string is wound around the inner spool with about two feet left out for you to be able to pull on. For the first part of the demonstration pull on the rope while it is parallel or at a sm... | <urn:uuid:940d1f6c-5df2-423c-b934-5d0db15ebe4f> | 4.28125 | 522 | Tutorial | Science & Tech. | 65.762227 |
On the long roster of essential biological processes, few, if any, are more important than photosynthesis, which converts sunlight to chemical energy. All plants use photosynthesis to obtain the energy they need to live, and all animals, in turn, harvest the energy they need — directly or indirectly — from plants.
The ... | <urn:uuid:998beeec-2a82-4a37-bccf-1785b0121f6b> | 4.34375 | 632 | Knowledge Article | Science & Tech. | 26.033578 |
The process of accumulation and sinking of warm surface waters along a coastline. A change of air flow of the atmosphere can result in the sinking or downwelling of warm surface water. The resulting reduced nutrient supply near the surface affects the ocean productivity and meteorological conditions of the coastal regi... | <urn:uuid:61e18a50-0af4-45a5-921f-c6275ddef450> | 3.8125 | 321 | Structured Data | Science & Tech. | 29.127871 |
The water soldier grows typically in slow-moving meso-eutrophic waters which have a favourable level of free-iron in the sediment.
In autumn it sinks to hibernate as a rosette with green leaves on the sediment surface. The plants become buoyant in spring following increased photosynthetic gas production and the formati... | <urn:uuid:ac55c09f-59ba-4d64-82f5-76112b3ade27> | 3.359375 | 149 | Knowledge Article | Science & Tech. | 38.915526 |
The U.S. National Oceanic And Atmospheric Administration (NOAA) released its updated Arctic Report card earlier this week. Like many other recent reports about the condition of the north, the canary in climate change coal mine, the news is sobering; new records have been set for snow extent, sea ice extent and ice shee... | <urn:uuid:8289b808-858b-4b87-94ce-0929e113a702> | 3.328125 | 568 | Content Listing | Science & Tech. | 56.096052 |
Geothermal energy continues to be a primary focal point for renewable energy sources and recent developments by the likes ofLockheed Martin and others are showing potential for oceans to be another viable option for geothermal technologies.
The concept is not new, but the application is. The general field is referred t... | <urn:uuid:0541dfac-d277-4260-894a-a0b6d2c4c5ec> | 3.640625 | 807 | Knowledge Article | Science & Tech. | 42.426646 |
The following calculations were made separately for each month at 9 stations/sites, which were located at Lapland (Käsivarsi and Sodankylä), coast of the Gulf of Bothnia (Hailuoto, Vaasa, and Rauma), coast of the Gulf of Finland (Hanko and Kotka), and inland Finland (Keski-Suomi and Kainuu).
First we search the minimum... | <urn:uuid:aacce157-3fc2-4603-9d3d-322f2f57b3be> | 2.921875 | 263 | Tutorial | Science & Tech. | 49.40625 |
Definition: A polyphase merge which seeks to minimize the number of merge passes by allocating output runs of each pass to the various output files. Since polyphase merging must have a different number of runs in each file to be efficient, one seeks the optimal way of selecting how many runs go into each output file. A... | <urn:uuid:c2e3597d-33d2-4114-9ba7-fc9669c67fb0> | 2.859375 | 221 | Knowledge Article | Software Dev. | 61.078088 |
1: Someone was saying that in a return type user-defined function (which returns a value) one has to have same data type of return value as the declared type of arguments. I think this is absolutely wrong. Because you could have different data types for arguments, further you could have totally different data type for ... | <urn:uuid:5dfc05d7-5447-4a19-a6e0-b19893d40cc5> | 2.8125 | 179 | Q&A Forum | Software Dev. | 60.668661 |
Population surveys of Boca Ciega Bay and surrounding waters are conducted on a regular basis during the summer months.� The research is formally authorized by the National Marine Fisheries Service. Typically, observations are made from a 19' boat, and digital pictures of the dorsal fin of each dolphin present in a grou... | <urn:uuid:6412c150-e9f0-4b23-8245-5f9ded083623> | 2.90625 | 339 | Knowledge Article | Science & Tech. | 21.616895 |
Where possible VOGLE allows for front and back buffers to enable things like animation and smooth updating of the screen. The routine backbuffer is used to initialise double buffering.
Make VOGLE draw in the backbuffer. Returns -1 if the device is not up to it.
Fortran: integer function backbuffer C: backbuffer() Pasca... | <urn:uuid:b3e2d746-5811-45e2-9c9a-18a900d2605f> | 2.71875 | 145 | Documentation | Software Dev. | 36.411364 |
Ocean chemistry changing at 'unprecedented rate'
(Reuters) - Carbon dioxide emissions that contribute to global warming are also turning the oceans more acidic at the fastest pace in hundreds of thousands of years, the National Research Council reported Thursday.
"The chemistry of the ocean is changing at an unpreceden... | <urn:uuid:a8ba9946-68bb-48f1-a542-66e1d79cdd15> | 3.21875 | 896 | Personal Blog | Science & Tech. | 37.572374 |
The thought that NE Ohio is an area previously free of earthquake activity is utter nonsense.
From an article back in January 2008
Still, Ohio seems increasingly prone to the shakes; there have been 25 earthquakes of magnitude 2.0 or higher over the past two years, equal to the number the five years before that. There ... | <urn:uuid:923b674a-fa68-4ce5-89ce-f74e0ac40063> | 3.265625 | 1,128 | Comment Section | Science & Tech. | 44.164619 |
setsockopt - set the socket options
int setsockopt(int socket, int level, int option_name,
const void *option_value, socklen_t option_len);
The setsockopt() function shall set the option specified by the option_name argument, at the protocol level specified by the level argument, to the value pointed to by the option_v... | <urn:uuid:f4429657-a9cf-4340-91ea-1bc1e4f6aa31> | 3.03125 | 1,532 | Documentation | Software Dev. | 50.099173 |
Extreme Mammal: Platypus
I have a sweatshirt I love hanging in my closet. It has small pictures of an alligator, duck, beaver, and snake. It says – with our powers combined, we are PLATYPUS! I couldn’t think of a better example of an extreme mammal than a Platypus. It is so unusual that when Europeans first encountered... | <urn:uuid:be71ee96-3df2-4673-8101-79f932f39979> | 2.953125 | 717 | Personal Blog | Science & Tech. | 58.476875 |
From: LARRY KLAES (email@example.com)
Date: Thu Aug 01 2002 - 12:45:10 PDT
----- Original Message -----
Sent: Tuesday, July 30, 2002 12:34 PM
Subject: Look At That Asteroid (2002 NY40)
Look at that Asteroid
NASA Space Science
A big space rock will soon come so close to Earth that sky watchers can see
it through binocul... | <urn:uuid:26f4bb5b-0a6e-48b8-bf6c-1fd898bb8b8a> | 3.171875 | 1,265 | Comment Section | Science & Tech. | 67.432705 |
Poisson's ratio (), named after Siméon Poisson, is the negative ratio of transverse to axial strain. In fact, when a sample object is stretched (or squeezed), to an extension (or contraction) in the direction of the applied load, it corresponds a contraction (or extension) in a direction perpendicular to the applied lo... | <urn:uuid:6d4c6a47-a87c-4610-ac0f-b99875ca107b> | 3.40625 | 2,361 | Knowledge Article | Science & Tech. | 46.698389 |
Typical situations in which a density matrix is needed include: a quantum system in thermal equilibrium (at finite temperatures), nonequilibrium time-evolution that starts out of a mixed equilibrium state, and entanglement between two subsystems, where each individual system must be described by a density matrix even t... | <urn:uuid:c9a61375-d47a-4b74-a84e-6614927377ec> | 3.359375 | 330 | Knowledge Article | Science & Tech. | 32.024125 |
News and trends in the geosciences for February 2000:
Bacteria in Lake Vostok
Beneath Antarctica's Vostok Station lies
one of the last oases for life on Earth still unexplored: subglacial Lake
Freeze-fry from the snowball
theory that Earth experienced Neoproterozoic glaciations that covered
the planet from the poles to... | <urn:uuid:afbd9239-2503-44d5-a021-f79c76a82533> | 2.859375 | 287 | Content Listing | Science & Tech. | 23.671015 |
Video: Self-aware monkeys
Experiments on monkeys suggest that the animals can recognise and react to their own image in a mirror. They altered their posture to look at their own genitals and other body parts they couldn't see directly.
The rhesus macaques studied in the experiments may be telling us that the current "g... | <urn:uuid:a1373c9b-cb20-4baa-a38f-fc1ac623df09> | 3.21875 | 1,522 | Comment Section | Science & Tech. | 48.408415 |
Radioactivity and Shielding
I am working on an experiment of radioactivity for my
physics class and I found the absorption of radiation by matter using
aluminum foil and placing various numbers of sheets of it between the
gamma source and the Geiger-Muller tube, I found the counts per minute
using for different numbers... | <urn:uuid:c9d9494f-fcbc-4ff4-a86b-3d69bffa4380> | 3.15625 | 470 | Q&A Forum | Science & Tech. | 48.120616 |
A Primer on Python Metaclass Programming
Pages: 1, 2
Solving Problems with Magic
So far, we have seen the basics of metaclasses. Putting them to work is more subtle. The challenge of using metaclasses is that in typical OOP design, classes do not really do much. Class inheritance structures encapsulate and package data... | <urn:uuid:eaeeded7-a104-4119-95e9-ed74dd007b5b> | 2.96875 | 1,014 | Knowledge Article | Software Dev. | 46.819192 |
|Jun24-12, 05:45 AM||#1|
Momentum or Earth?
Earlier I was thinking about circular motions and centripetal forces and the earth around the sun, If p=mv and the velocity of a object in circular motion is constantly changing does this mean Earth's momentum is constantly changing?
or is it that earth is travelling on a str... | <urn:uuid:eebfaf9a-7b70-4e6d-a515-433797de986e> | 2.796875 | 213 | Comment Section | Science & Tech. | 38.347762 |
No doubt many of you have seen stories during the last few years about the repeated episodes of cold and snow in Western Europe-- and particularly Britain. Last December, some called it the snowiest winter in 25 years and the coldest in over 100 years.
On average, Britain’s winter climate is mild and has been so for ma... | <urn:uuid:c27ab57b-1794-4820-ae03-50712486696b> | 3.453125 | 1,265 | Personal Blog | Science & Tech. | 45.154909 |
Here’s how Earthshine works. Sunlight reflects off the blue and white Earth into space at the moon. The moon absorbs some and sends the rest back to us. We see this twice-reflected light as a dim illumination of the portion of the moon not lit by direct sunlight. Illustration, crescent and sun photos: Bob King; Earth i... | <urn:uuid:488aedb2-991d-44d5-8d0b-4d823a8e6d72> | 4.09375 | 791 | Personal Blog | Science & Tech. | 72.886655 |
Getting Acquainted with Entropy
You can experience directly the massA measure of the force required to impart unit acceleration to an object; mass is proportional to chemical amount, which represents the quantity of matter in an object., volume, or temperatureA physical property that indicates whether one object can tr... | <urn:uuid:515677ee-0c85-41fa-b12d-7d0d77499011> | 3.828125 | 887 | Tutorial | Science & Tech. | 34.472865 |
“There is absolutely nothing to restrict the geographical ranges of animals in the deep sea. Dr. Wallich, the pioneer of deep-sea research, eighteen years ago recognized the deep homothermal sea “As the great highway for animal migration, extending pole to pole” Below 500 fathoms it is everywhere dark and cold, and the... | <urn:uuid:ba3506d4-0626-48b6-be9e-33e0594da13e> | 2.9375 | 686 | Personal Blog | Science & Tech. | 23.86 |
|Jmol-3D images||Image 1|
|Molar mass||112.08676 g/mol|
N/A - decomposes
|Solubility in water||Soluble|
|Main hazards||carcinogen & teratogen with chronic exposure|
|Flash point||non flammable|
| (what is: / ?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Uracil... | <urn:uuid:c3d90c7e-d96c-464a-909f-0daebabef533> | 3.546875 | 2,341 | Knowledge Article | Science & Tech. | 41.865531 |
Brief SummaryRead full entry
The Phycitinae comprise approximately 3500 described species in more than 550 genera (Beccaloni et al. 2003; Nuss et al. 2009). The subfamily occurs in all biogeographical regions except Antarctica, but it is poorly known outside the Holarctic biomes, and the number of species yet to be des... | <urn:uuid:9fb9c806-67c0-4ab2-812c-697ebdf6b621> | 3.703125 | 276 | Knowledge Article | Science & Tech. | 37.311182 |
The USGS Water Science School
The U.S. Geological Survey (USGS) often works on projects where the ecology and biology of local streams are studied. In these studies, it is often necessary to investigate what fish live in the steam. This picture shows fish being collected as part of a water-quality study in Georgia. Par... | <urn:uuid:57130314-75f7-441a-9e1b-81bdcc51d0d7> | 4.0625 | 206 | Truncated | Science & Tech. | 59.356759 |
While officials in Washington pick apart the sequence of events that led to the release of nearly five million barrels of oil in the Deepwater Horizon disaster, scientists are still trying to figure out where all of that oil went.
Some of it was captured in the spill response, some of it is still visible in marshes and... | <urn:uuid:5392112d-26b5-4027-a3ee-792e417a3fce> | 3.3125 | 240 | Truncated | Science & Tech. | 35.472059 |
Tiny Bugs Enlisted to Fight Invading Water Hyacinths
By Leon Marshall in Johannesburg
for National Geographic News
|March 3, 2003|
The purple-blue flowers protruding from mats of green leaves spreading
over a tranquil pond make a beautiful sight. But in South Africa, as
with many other countries invaded by the South Am... | <urn:uuid:1974c066-5256-41f4-900f-15c93f8dcd75> | 3.65625 | 1,492 | Truncated | Science & Tech. | 41.165931 |
RetroBSD is a port of 2.11BSD Unix intended for embedded systems with fixed memory mapping. The current target is Microchip PIC32 microcontroller with 128 kbytes of RAM and 512 kbytes of Flash. PIC32 processor has MIPS M4K architecture, executable data memory and flexible RAM partitioning between user and kernel modes.... | <urn:uuid:d11de41c-fc0f-492b-89ff-c621bd3d393d> | 2.96875 | 206 | Knowledge Article | Software Dev. | 40.052297 |
Michael Becker, a doctoral student at McGill University, was a scientific diver on an expedition to Lake Untersee in Antarctica.
If you’re going where there’s no air to breathe, you better be organized.
Any kind of underwater diving involves process for that very reason. There’s the early-morning wake-up, the weather c... | <urn:uuid:6953bcfc-0963-49a2-be30-a841f3a2efc2> | 2.796875 | 1,583 | Personal Blog | Science & Tech. | 45.302084 |
In cell biology, potassium channels are the most common type of ion channel. They form potassium-selective pores that span cell membranes. Potassium channels are found in most cells, and control the electrical excitability of the cell membrane. They shape action potentials and set the resting membrane potential. They r... | <urn:uuid:9f581fc7-9ed9-4ea2-9c2f-479f418af58d> | 3.859375 | 267 | Knowledge Article | Science & Tech. | 36.576789 |
On September 1, 1859, British astronomer Richard Carrington was sketching sunspots through a telescope when he saw a bright, oval-shaped light expanding outward from the Sun. Eighteen hours later, brilliant auroras colored the night sky as far south as the Caribbean, and Earth’s fledgling telegraph systems went berserk... | <urn:uuid:e0c07622-1256-4a27-9c4b-673e95d639ca> | 4.09375 | 1,009 | Knowledge Article | Science & Tech. | 41.291832 |
13 September 2012
13 September 2012
Speaker: Maria Zuber (MIT)
Title:Gravity Recovery and Interior Laboratory (GRAIL) Mission: Mission Status and Initial Science Results
Abstract:The Gravity Recovery and Interior Laboratory (GRAIL) Mission is a component of the NASA Discovery Program. GRAIL is a twin-spacecraft lunar g... | <urn:uuid:f75ee11b-43bf-40ec-b676-ebea98a9261a> | 2.828125 | 376 | Academic Writing | Science & Tech. | 27.073592 |
A mapping of a topological vector space into a topological vector space such that is a bounded subset in for any bounded subset of . Every operator , continuous on , is a bounded operator. If is a linear operator, then for to be bounded it is sufficient that there exists a neighbourhood such that is bounded in . Suppos... | <urn:uuid:20b97adf-a480-4132-a14f-f1988c39968f> | 3.0625 | 586 | Knowledge Article | Science & Tech. | 45.951098 |
Study: Loss Of Genetic Diversity Threatens Species Diversity
Davis, California - Human activities are eliminating biological diversity at an unprecedented rate. Critical when you consider that variation in plants and animals gives us a rich and robust assemblage of foods, medicines, industrial materials and recreation ... | <urn:uuid:df9f2419-1cbc-4c73-9ae1-0b85b4d5cd23> | 2.828125 | 311 | Truncated | Science & Tech. | 26.796375 |
Posted at La República Catalana
Temperature at Darwin Airport in Australia. The “adjustments” in red reverse the real blue temperature fall of -0.7 °C to a rise of 1.2 °C. Below: Bolivia, a very high mountainous country, has no data after 1990 (boxed in blue). But how do you get a hot Bolivia when you haven’t measured ... | <urn:uuid:a12d867b-87af-44a5-93d0-70f5ef544dc7> | 3.171875 | 654 | Knowledge Article | Science & Tech. | 52.356037 |
TNRTB Archive - Retained for reference information
American chemists have found more evidence for the supernatural design of the quantum tunneling phenomenon. In quantum tunneling, a particle crosses or tunnels through a potential energy barrier where classical physics would conclude that the particle did not have enou... | <urn:uuid:9bf27cce-5cb9-4d4e-b722-dbb29d6a0752> | 3.28125 | 208 | Content Listing | Science & Tech. | 28.950759 |
The first day of summer is June 21, just about two weeks away. The Summer Triangle now appears in the east at dusk. Made of three bright stars from three different constellations, the Summer Triangle can be picked out when the brightest stars are appearing after sunset, so it can be an easy target for young astronomers... | <urn:uuid:23bbae20-f3bd-4f87-830e-afe5b87e86d6> | 3.75 | 334 | Personal Blog | Science & Tech. | 62.424535 |
Python’s with statement, available since Python 2.5, does not seem to be widely used despite being very useful.
Here we describe how to use the
with statement to create a simple timer with the syntax:
>>> with TicToc(): ... some_slow_operations ... Elapsed time is 2.000073 seconds.
> tic ; some_slow_operations; toc Ela... | <urn:uuid:61d60221-fae1-4943-890d-950ddc77340d> | 3.734375 | 564 | Documentation | Software Dev. | 66.99704 |
With the help of an Item Renderer, list-based controls can customize the appearance of the data provider's data.
In addition, the custom appearance can be controlled by conditional logic processed by an Item Renderer. We'll look at this a bit later.
A single instance of your Item Renderer class (ListIR) is created for ... | <urn:uuid:056f689c-69d3-43e4-8395-2e2dbbf2a568> | 2.9375 | 895 | Documentation | Software Dev. | 43.321583 |
January 25, 2012
Our photo gallery of the most stunning images from the recent northern lights show.
Precious few people around the world have ever had the chance to witness the remarkable phenomenon known as the aurora borealis, or northern lights. The collision of magnetically charged solar particles with the earth’s... | <urn:uuid:e2e5cf4c-7415-46ba-af26-eb02e2452de2> | 3.140625 | 238 | Truncated | Science & Tech. | 46.337575 |
Update! (19 July 06) Added Multiply. Fixed a problem with using __builtin_clz().
Update! (17 July 06) The code has been considerably refactored. Decided to go with single function per expression. The expressions have been reduced as a first optimization pass.
ProjectThe goal of this project is serve as an example of de... | <urn:uuid:02123ba3-e7ba-42a0-83e2-40a55b381422> | 2.78125 | 306 | Documentation | Software Dev. | 47.521267 |
Q&A: Normal Stars, White Dwarf Stars, and Star Clusters
Is Antares showing signs of pre-Supernova
activity like Eta Carinae or Betelgeuse?
We believe it will be many years before Antares shows any
signs of pre-supernova activity. More information on this star may be
which explains the process by which the star evolves ... | <urn:uuid:0c815c24-9ed9-4756-9e78-cd8143d6021c> | 2.75 | 224 | Q&A Forum | Science & Tech. | 38.237843 |
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RE: Triassic dinosaur evolution
Eric Boehm wrote:
> Generically, I would think a quadrupedal predator would be able to grow
> larger than a Biped, and given the limbs of a T-rex, its obvious freeing the
> forelimbs w... | <urn:uuid:2011aac7-c510-44b8-a06b-6a570890d51e> | 2.859375 | 514 | Comment Section | Science & Tech. | 40.754103 |
Plastids are major organelles found in the cells of plants and algae. They are the site of manufacture and storage of important chemical compounds used by the cell. Plastids often contain pigments used in photosynthesis and the types of pigments present can change or determine the cell's color. They possess a double-st... | <urn:uuid:92b4f548-bde8-4c0a-a06e-2c7a7a7f801a> | 3.890625 | 2,412 | Knowledge Article | Science & Tech. | 37.04873 |
These sessile Cnidaria occur clownfishes or anemonefishes, from the Genus Amphiprion and the Genus Premnas. Only ten of the >1000 species of Actiniaria are known to associate with clownfish, and all ten of them are shallow-water dwellers, because they all have another symbiotic relationship in common- they all host sin... | <urn:uuid:9ea27dda-a845-416c-8621-24a547d4c6fa> | 3.453125 | 563 | Knowledge Article | Science & Tech. | 44.56746 |
The Physics Factbook™
Edited by Glenn Elert -- Written by his students
An educational, Fair Use website
topic index | author index | special index
|Bibliographic Entry||Result |
|Barnes, Sue & Helena Curtis. Biology, Fifth Edition. New York: Worth, 1989: 180-182.||"In the course of the reaction, about 7 kilocalories of... | <urn:uuid:44cad09a-56ef-4ed7-942a-be72717b0aac> | 3.078125 | 966 | Content Listing | Science & Tech. | 35.658297 |
For systems like Coq that are based on type theory, this question is trickier to answer than you might expect.
First of all, what does it take to "know" the consistency strength of some system? Classically, the most thoroughly studied logical systems are based on first-order logic, using either the language of elementa... | <urn:uuid:2638bcb8-f9f2-4a25-8978-fd58b04e26de> | 2.734375 | 374 | Q&A Forum | Science & Tech. | 43.837745 |
Makes a request to a Uniform Resource Identifier (URI). This is an abstract class.
Assembly: System.Net (in System.Net.dll)
Thetype exposes the following members.
|ContentLength||When overridden in a descendant class, gets or sets the content length of the request data being sent.|
|ContentType||When overridden in a de... | <urn:uuid:0ce6315b-0e70-4e28-9efe-88efddf770aa> | 2.71875 | 1,054 | Documentation | Software Dev. | 30.114732 |
Arctic sea ice extent for January 2013 was well below average, largely due to extensive open water in the Barents Sea and near Svalbard. The Arctic Oscillation also remained in a primarily negative phase. Antarctic sea ice remained extensive due to an unusual northward excursion of ice in the Weddell Sea. December of 2... | <urn:uuid:b7ffa2cf-0560-4da1-a72e-2e3600942384> | 3 | 1,294 | Knowledge Article | Science & Tech. | 52.216966 |
This artist's impression of Saturn's moon Titan shows the change in observed atmospheric effects before, during and after equinox in 2009. The Titan globes also provide an impression of the detached haze layer that extends all around the moon (blue). This image was inspired by data from NASA's Cassini mission.
During t... | <urn:uuid:ed1e2a87-d2a6-4b55-81f1-8bb3c0e169cf> | 3.828125 | 418 | Knowledge Article | Science & Tech. | 43.87677 |
In accelerators we shoot very high momentum particles at each other to probe their structure at very small length scales. Has that anything to do with the HUP that addresses the spread of momentum and space?
Related, when we accelerate a proton at exactly, say, 1 GeV, then we know exactly its momentum. But for high mom... | <urn:uuid:9095fbe4-c41d-4019-b545-9a61cbf40167> | 2.71875 | 107 | Q&A Forum | Science & Tech. | 50.630853 |
NMR could help clear landmines
Apr 17, 2002
Landmines could be cleared more quickly with a new technique based on nuclear magnetic resonance. Most landmine detectors search for buried metal, but these devices can be inefficient because they also detect rusty nails and shrapnel. The technique developed by Markus Nolte o... | <urn:uuid:4e8c7f73-f5a7-45eb-ae25-04797aed2465> | 3.078125 | 537 | Truncated | Science & Tech. | 41.435077 |
Still have questions? Dr. Bryan Wallace, Conservation International’s resident sea turtle scientist, and his colleagues are here to help! Click here to send Bryan your unanswered queries. Each month, he’ll select one question to explore in greater depth with his friends, and post their findings here for all to see.
The... | <urn:uuid:d89dc4d3-e168-4377-97dd-0a169d47866c> | 2.84375 | 544 | Knowledge Article | Science & Tech. | 49.256981 |
Epimetheus (pronounced ep-eh-MEE-thee-us; adjective: Epimethean) and the neighboring moon Janus have been referred to as the Siamese twins of Saturn because they orbit Saturn in nearly the same orbit. This co-orbital condition (also called 1:1 resonance) confused astronomers, who at first could not believe that two moo... | <urn:uuid:b083e558-95ae-4099-8bb5-98a12d4deba5> | 3.796875 | 1,044 | Knowledge Article | Science & Tech. | 47.983443 |
Sculptor, Grus, and Phoenix - Downloadable article
Many of the finest nearby galaxies lie tucked away in the southern constellation Sculptor.
March 3, 2009
|This downloadable article is from an Astronomy magazine 45-article series called "Celestial Portraits." The collection highlights all 88 constellations in the sky ... | <urn:uuid:e9942f0f-ac90-4b75-b21f-e8f7b28ef1c0> | 2.765625 | 544 | Truncated | Science & Tech. | 61.990702 |
Louisiana delta, Southern USA — The Deepwater Horizon Oil Spill of April 20, 2010, was the largest that the US had ever experienced, with over 250 million gallons of crude oil released into the Gulf of Mexico. Many areas were greatly impacted by the oil spill, including the Gulf coast of Louisiana. The impacts from thi... | <urn:uuid:d812a739-20c6-46e3-9f39-dbc60ff26e87> | 3.640625 | 705 | Knowledge Article | Science & Tech. | 35.920273 |
Science Scoops: Order! Order!
by Stephen James O'Meara
If you thought finding several new species of insects was exciting, get this: Danish and German scientists have recently discovered a new order of insects! In biology, an order is a primary classification of related animals, which is then subdivided into genera and... | <urn:uuid:5a9eed44-c12f-45d4-8201-1ac2716dca75> | 3.796875 | 621 | Knowledge Article | Science & Tech. | 45.872027 |
Resource depletion, climate change and rising oil prices have led to large investments in renewable energy and new fossil fuel extraction techniques. However despite the positive headlines on solar, wind, and shale, all of these sectors are beset with problems that add to our uncertain energy future. We appear to be de... | <urn:uuid:947bfdd6-f3d0-46f2-89d4-4f5d394880fe> | 3.375 | 491 | Audio Transcript | Science & Tech. | 45.533302 |
Microscopic evolution with thermal fluctuations on a discrete space...
On the microscopic scale, one considers an atomistic or mesoscopic model. There is a lot of freedom to choose the model, but to have an application in mind let us think of a spin system on a lattice. The microscopic evolution is usually governed by ... | <urn:uuid:30999b98-a32e-40b5-a77e-7d2fa68335f3> | 2.828125 | 1,142 | Academic Writing | Science & Tech. | 34.584751 |
Zoologger is our weekly column highlighting extraordinary animals – and occasionally other organisms – from around the world.
Species: Physeter macrocephalus
In the chill darkness 2 kilometres below the surface of the Southern Ocean, one of nature's greatest battles is being fought. One of the combatants is a kraken – ... | <urn:uuid:2d47ca71-cae1-46b8-9268-ff94f741d748> | 3.78125 | 1,566 | Comment Section | Science & Tech. | 54.566089 |
METHANE clouds scud over an icy landscape that barely registers a temperature above -180 °C. If life exists on Titan, surely it has to be about as otherworldly as any our solar system could support?
Perhaps not: a simulation of conditions on Saturn's giant frigid moon shows that some of the key molecular precursors of ... | <urn:uuid:588b9f03-504b-427b-9407-68d24be5f224> | 3.640625 | 200 | Truncated | Science & Tech. | 56.081147 |
Transcript for Oceanfloor Legacy, segment 13 of 14
The sea floor images combined with the seismic profiles, the thirty cores, and the four sonar mosaics make up a package of basic scientific research that begins to answer questions about the processes shaping the sea floor west of San Francisco. The policy makers who m... | <urn:uuid:2ce61deb-febe-4057-80b0-4ee218b9673a> | 3.09375 | 333 | Audio Transcript | Science & Tech. | 51.787245 |
Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
June 20, 1996
Credit: Apollo 12 Crew, NASA
Explanation: In November of 1969, homeward bound aboard the "Yankee Clipper" command module, the Apollo 1... | <urn:uuid:85975851-e752-493e-9257-07b114156146> | 4.28125 | 215 | Knowledge Article | Science & Tech. | 47.511396 |
Want to stay on top of all the space news? Follow @universetoday on Twitter
Some believe that it is always warmer during daytime at the equator because the Sun is directly overhead at midday and is able to warm everything equally underneath it. In reality, there are only two instances in the entire year when the Sun ca... | <urn:uuid:1bd48f64-f7cb-403c-832a-dafd2c7835f2> | 4.21875 | 598 | Knowledge Article | Science & Tech. | 51.003973 |
This is a false color image of a mosaic of Mercury.
Click on image for full size
Courtesy of NASA.
Observations of Mercury from Earth
Before the Mariner 10 mission of Mercury, it was very difficult to
see any markings on the surface of the planet from Earth. This image
shows a view of Mercury obtained from a telescope ... | <urn:uuid:0841a9be-603e-4580-a3ac-17052af2c908> | 4.1875 | 606 | Content Listing | Science & Tech. | 62.244845 |
Frogs can hear using big round ears on the sides of their head called a tympanum. Tympanum means drum. The size and distance between the ears depends on the wavelength and frequency of a male frogs call. On some frogs, the ear is very hard to see!
Ever wonder how frogs that can get so LOUD manage not to hurt their own ... | <urn:uuid:61c9e9dd-fb02-4465-9049-ee9d347706b0> | 3.90625 | 178 | Knowledge Article | Science & Tech. | 78.970476 |
Many agree with this theory. That the author mentions this as a possible slam dunk against climate change gets into the real meat of the misunderstanding. Climate change is not defined as all gloom and doom in the science world, but the general public has gotten that impression. In the article's scenario the plants are... | <urn:uuid:7cfbe46f-ef54-4ba7-b6ea-507aa789ac16> | 2.703125 | 644 | Personal Blog | Science & Tech. | 49.854313 |
6.1.2 File Object Creation
These functions create new file objects.
- fdopen (fd[, mode[, bufsize]])
Return an open file object connected to the file descriptor fd.
The mode and bufsize arguments have the same meaning as
the corresponding arguments to the built-in open()
Availability: Macintosh, Unix, Windows.
- popen ... | <urn:uuid:1273041d-781d-4d40-9f5b-90670111e971> | 3.171875 | 293 | Documentation | Software Dev. | 40.718809 |
To rate this resource, click a star:
Though corn is "all-natural" in some ways, in others it is entirely manmade. This news brief from February 2007 explains the evolutionary tools
that ancient humans used to engineer modern corn and the tools that scientists are using today to reconstruct corn's evolutionary history.
... | <urn:uuid:07cc57b3-3db9-4d3b-ae8b-c768a5219901> | 3.96875 | 215 | Content Listing | Science & Tech. | 21.450989 |
GCC moves to the C + + compilation of himself in order to improve code quality
by admin ·
To begin with only the modified bootstrap code. Purpose – to improve the quality of code (because the C + + works harder to type). When there will classes and templates .. Officially stated reasons for using C + +:
- C + + – stand... | <urn:uuid:33558503-ada2-4c02-a9b8-a6a8a220fcd4> | 3.21875 | 176 | Listicle | Software Dev. | 59.768541 |
AC Power Theory - Advanced maths
This page covers the mathematics behind calculating real power, apparent power, power factor, RMS voltage and RMS current from instantaneous Voltage and Current measurements of single phase AC electricity. Discreet time equations are detailed since the calculations are carried out in th... | <urn:uuid:abc24511-7d7e-4955-b081-76ce767245ca> | 3.796875 | 437 | Tutorial | Science & Tech. | 40.912701 |
As others pointed out, analyzing recursion can get very hard very fast. Here is another example of such thing: http://rosettacode.org/wiki/Mutual_recursion http://en.wikipedia.org/wiki/Hofstadter_sequence#Hofstadter_Female_and_Male_sequences
it is hard to compute an answer and a running time for these. This is due to t... | <urn:uuid:064b64f2-b5f0-4d75-86aa-d60ed7f3e66a> | 2.71875 | 633 | Q&A Forum | Software Dev. | 90.534936 |
A female hammerhead shark gave birth to a pup in the Henry Doorly Zoo in Nebraska in 2001 despite having no contact with a male shark. Thanks to new DNA profiling technology, scientists have been able to show conclusively that the shark pup contained no genetic material from a male. Before you whip out your Book of Rev... | <urn:uuid:80b319c6-5712-4f2d-bf82-2e9d61e153fd> | 3.5625 | 185 | Personal Blog | Science & Tech. | 33.171613 |
9. Dr. Boris Komitov, Bulgarian Academy of Sciences,
Institute of Astronomy, and Dr. Vladimir Kaftan:
Central Research Institute of Geodesy, Moscow.
From their paper: Komitov, B., and V. Kaftan, (2004), The sunspot
activity in the last two millennia on the basis of indirect and instrumented indexes: time series models ... | <urn:uuid:4c586a0d-e06e-4836-8804-2fda44f0385a> | 2.765625 | 935 | Comment Section | Science & Tech. | 59.857974 |
New evidence has shown that a “hot spot” could cause sea levels on the eastern seaboard of the US to advance faster than the projected global average. This increase is attributed to a change in the North Atlantic current, which scientist say is warming and as a result slowing down.
The affected are stretches over 600 m... | <urn:uuid:95cb5eb9-c256-4b32-9a9f-098990150ebe> | 3.734375 | 929 | Personal Blog | Science & Tech. | 53.235026 |
Protecting Biodiversity in Tengchong
Description: The project site is located at the southern edge of Gaoligonshan Nature Reserve in Yunnan province, China. The proposed project is a small-scale reforestation project under CDM. Mixed forests will be established around the buffer zone of Gaoligonshan Nature Reserve and ... | <urn:uuid:44f6e0a8-54dd-402e-8e73-dd73180c6ed0> | 2.703125 | 114 | Knowledge Article | Science & Tech. | 20.5075 |
#include "inndcomm.h" int ICCopen() int ICCclose() void ICCsettimeout(i) int i; int ICCcommand(cmd, argv, replyp) char cmd; char *argv; char **replyp; int ICCcancel(mesgid) char *mesgid; int ICCreserve(why) char *why; int ICCpause(why) char *why; int ICCgo(why) char *why; extern char *ICCfailure;
ICCopen creates a Unix... | <urn:uuid:629269d0-6631-41c7-8ca2-2d34fad887fc> | 2.734375 | 601 | Documentation | Software Dev. | 54.5276 |
› View larger image
This image represents a simulation of a day's worth of sea surface salinity observations as planned to be made by the Aquarius instrument. Credit: NASA Aquarius Science Team/Aquarius Data Processing System
With more than a few stamps on its passport, NASA's Aquarius instrument on the Argentinian Sat... | <urn:uuid:71e8e602-97de-4dbd-b292-9bef79d3fdf9> | 3.578125 | 911 | Knowledge Article | Science & Tech. | 29.244795 |
Forget the northern star, follow the cows instead. Researchers have discovered that when grazing or resting, cattle and also deer, tend to point their bodies towards Earth’s magnetic poles, which suggests that they are able to sense magnetic fields like smaller animals.
As a result, you’ll notice that these animals oft... | <urn:uuid:f03c2d81-41a6-4fd0-b0a3-46c3bc7a2de4> | 3.125 | 159 | Personal Blog | Science & Tech. | 50.120796 |
AB and CD are two ideal springs having force constant K1 and K2 respectively. Lower ends of these springs are attached to the ground so that the springs remain vertical. A light rod of length 3a is attached with upper ends B and C of springs. A particle of mass m is fixed with the rod at a distance a from end B.and in ... | <urn:uuid:16d233fe-3eb4-46cd-b570-8b808edeae92> | 3.34375 | 91 | Content Listing | Science & Tech. | 72.460707 |
experiences the force of gravity
. It is the weakest of all the forces of nature, but it is the dominant force
in astronomy and cosmology. It controls the movement
of planets in our solar system, the structure
of stars, the shapes of galaxies and the ultimate fate
of our universe.
The concept of a universal law of grav... | <urn:uuid:41f15ca5-830d-4e38-bfcd-f626ba1b10d4> | 3.703125 | 153 | Knowledge Article | Science & Tech. | 36.470729 |
Dec. 10, 2012 A theoretical and numerical study of graphene sheets reveals a property that may lead to novel opto-electric devices and circuits.
One-atom-thick sheets of carbon -- known as graphene -- have a range of electronic properties that scientists are investigating for potential use in novel devices. Graphene's ... | <urn:uuid:fdaee29b-65c1-4388-b9b1-73dc065fb4d8> | 3.859375 | 698 | Truncated | Science & Tech. | 28.255643 |