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Experimental explanation of supercooling : why water does not freeze in the clouds
21 April 2010
European Synchrotron Radiation Facility (ESRF)
Supercooling, a state where liquids don’t solidify even below their normal freezing point, still puzzles scientists today. An example of this phenomeno... | <urn:uuid:b849dcab-8302-40d9-a5d2-3f3d3804a220> | 3.84375 | 912 | Truncated | Science & Tech. | 20.4674 |
Black holes are among the most fascinating phenomena thought to exist in the Universe. A black hole is a region of space in which the gravitational field is so powerful that nothing, not even light, can normally escape its pull after having fallen past its event horizon. The equations describing a black hole were devel... | <urn:uuid:1597a173-5f69-4959-ba6a-ba8feca7fd5a> | 4.40625 | 308 | Academic Writing | Science & Tech. | 35.512678 |
Return to Vignettes
of Ancient Mathematics
I Prop. 15
II Prop. 2
(diagram 1 = general diagram)
note on the theorem
1. If two areas are enclosed by a straight-line and the section of a right-angled cone, which we are able to apply to the given straight-line, and they do not have the same center of weight, the center of ... | <urn:uuid:d3345039-18dc-46e0-8b3a-e16f86590f76> | 3.59375 | 1,716 | Academic Writing | Science & Tech. | 71.611003 |
As I walked through the canopy of hemlocks to reach the front door of the Cary Institute a few days ago, I was greeted by the singing of many species of birds. Although the evergreen foliage hid them from view, the variety of their songs was impressive. There were clearly many different species flitting about and singi... | <urn:uuid:1f4b4b45-4ae4-4731-9b17-b8945cd80253> | 3.4375 | 731 | Nonfiction Writing | Science & Tech. | 47.078072 |
Severe wildfires can create clouds of smoke so thick that they are hard to see through even with satellite sensors. That’s the kind of visibility problem that residents of Salmon, Idaho, and other towns faced in the summer of 2012 while living downwind of the large Mustang Complex fire in Salmon-Challis and Bitterroot ... | <urn:uuid:05c9bf17-2bb7-474b-9c8e-dc765ca4e6ab> | 3.328125 | 451 | Knowledge Article | Science & Tech. | 49.45096 |
龙脑香科 long nao xiang ke
Authors: Xi-wen Li, Jie Li & Peter S. Ashton
Trees, evergreen or semievergreen, rarely deciduous in dry season. Xylem with aromatic resin in intercellular resin canals. Branchlets with stipular scars, sometimes annular. Leaves simple, alternate; stipules persistent or caducous, large or small; le... | <urn:uuid:30bf0eef-9c8f-4fd3-8586-650f170eb04c> | 2.84375 | 533 | Knowledge Article | Science & Tech. | 25.836483 |
. "Genetics and the origin of bird species." (NAS Colloquium) Genetics and the Origin of Species: From Darwin to Molecular Biology 60 Years After Dobzhansky. Washington, DC: The National Academies Press, 1997.
The following HTML text is provided to enhance online
readability. Many aspects of typography translate only a... | <urn:uuid:441a4c0e-6e02-4a03-8051-79e8026331b6> | 3.578125 | 1,469 | Academic Writing | Science & Tech. | 34.20763 |
Neil Fisher (5 March, p 32) suggests that most of the global warming projections of the Intergovernmental Panel on Climate Change are flawed because, he thinks, there must be negative feedbacks which will counter global warming (5 March, p 32). He believes that, without such negative feedbacks, the climate would not ha... | <urn:uuid:ffadee3b-c6f3-4228-b675-fd7f689c253a> | 3.46875 | 216 | Truncated | Science & Tech. | 52.7513 |
Physicists study matter by causing particles, accelerated to high energy, to collide with each other. In the high energy collisions, new particles can be created and new processes occur. In these collisions the most fundamental constituents of matter reveal their properties.
|Accelerators in Use|
|Accelerators in Resea... | <urn:uuid:46943a0b-2eec-42b8-b6da-fc587e77cb05> | 3.375 | 139 | Knowledge Article | Science & Tech. | 22.196978 |
Fertile areas of the ocean swarm with hundreds and hundreds of millions of
animal plankton. Some are visible as small dustlike particles; others can be
seen only with a microscope. The living zooplankton shown here contain two
kinds of copepods - animals shaped like grains of rice - and one kind of arrow
worm - the lon... | <urn:uuid:3ef4acdd-6286-40e9-bc51-47922b431b04> | 2.84375 | 84 | Knowledge Article | Science & Tech. | 43.948656 |
But at the close of the ice age, about 13,000 years ago, most of the megafauna vanished — an extinction attributed to both climate change and the appearance of efficient Stone Age hunters. With them went the largest predators, allowing the smaller grey wolves to fill the vacant niche, which put them in competition with... | <urn:uuid:04d762fe-2a5c-4c30-82bc-c0ce0458db71> | 4.0625 | 254 | Knowledge Article | Science & Tech. | 43.843444 |
Amazing Metazoan Archive
- The Amazing Metazoan for April 5 2013 is the greenling (genus Hexagrammos), a demersal fish commonly found throughout Sitka Sound. The Sound is home to three species of greenlings within the genus Hexagrammos, and one species of the genus Oxylebius. The rock greenling Hexagrammos lagocephalus... | <urn:uuid:22c7c46f-898c-440c-8561-b87cfef5c75b> | 2.78125 | 2,902 | Content Listing | Science & Tech. | 41.912012 |
Chartella papyracea occurs throughout the British Isles. The species is apparently restricted to the temperate east Atlantic, ranging from the southern North Sea through the English channel, the south and west coasts of the UK, the Irish Sea to the northern coast of Spain
Colonies are predominantly found in the shallow... | <urn:uuid:6096da11-f0f2-4c92-a772-315d140cf0c8> | 3.46875 | 1,123 | Knowledge Article | Science & Tech. | 38.806885 |
Les Bossinas / NASA
An artist's conception shows a starship entering a wormhole to travel to a distant galaxy.
Last month's "100-Year Starship" conference, backed by NASA and the Pentagon's Defense Advanced Research Projects Agency, threw a huge spotlight on the idea of sending spacecraft far beyond our solar system — ... | <urn:uuid:a7bb0d53-7667-4726-a2f8-b26210761032> | 3.171875 | 1,527 | Audio Transcript | Science & Tech. | 56.364517 |
- Physically mismeasured skulls so that their cranial volumes would match his expectations about racial differences in cranial volume
- Statistically manipulated population means by taking averages of individual skulls rather than averages of population averages, hence biasing his "Indian" means to be lower
Furthermore... | <urn:uuid:449f2c84-0100-4b97-a3c2-6960ffc7fc0d> | 3.234375 | 1,036 | Personal Blog | Science & Tech. | 33.712674 |
In 2007 China conducted an anti-satellite (ASAT) test, shattering an aging Chinese weather satellite
with a missile. This led to the creation of over 3,000 new debris fragments--all potentially catastrophe-causing should they collide with a shuttle or space station.
But surprisingly, for debris at low altitudes, fragme... | <urn:uuid:7dd43a26-9246-48f7-8ed9-ccdeea6284ea> | 2.796875 | 207 | Knowledge Article | Science & Tech. | 31.18125 |
05 Aug 2010
A Looming Oxygen Crisis and Its Impact on World’s Oceans
As warming intensifies, scientists warn, the oxygen content of oceans across the planet could be more and more diminished, with serious consequences for the future of fish and other sea life.
The Deepwater Horizon oil spill is overshadowing another ca... | <urn:uuid:0dcbf88b-1efa-442c-bced-680e5e6ded77> | 3.484375 | 2,261 | Content Listing | Science & Tech. | 46.377854 |
Pub. date: 2008 | Online Pub. Date: April 25, 2008 | DOI: 10.4135/9781412963893 | Print ISBN: 9781412958783 | Online ISBN: 9781412963893 | Publisher:SAGE Publications, Inc.About this encyclopedia
THE JET STREAMS are fast-flowing eastward currents of air in the mid-latitudes of both hemispheres, with their cores at alti... | <urn:uuid:77a3ab26-6843-4df9-9182-2106e64c451d> | 3.203125 | 147 | Truncated | Science & Tech. | 69.476238 |
MNN: The Arctic has seen better years than 2012. Its sea ice melted to an all-time low this summer, and by fall it was 18 percent smaller than at any point in recorded history. As U.S. scientists noted in their annual Arctic Report Card, the region’s sea ice is now “a younger, thinner version of its old self” — and tha... | <urn:uuid:2e41ddc2-6e17-4e5b-b999-e38ba99a65ee> | 3.5 | 2,085 | Listicle | Science & Tech. | 44.572885 |
Science Fair Project Encyclopedia
A liquid (a phase of matter) is a fluid whose volume is fixed under conditions of constant temperature and pressure; and, whose shape is usually determined by the container it fills. Furthermore, liquids exert pressure on the sides of a container as well as on anything within the liqui... | <urn:uuid:09654575-99ff-4339-9a4a-e64b135faf04> | 4.0625 | 287 | Knowledge Article | Science & Tech. | 38.986311 |
Printer friendly version
Understanding light-driven molecular switches
20 May 2010
Light-driven molecular switches are already used in technical devices such as LCD displays and storage media. Full comprehension of the processes at a molecular scale is required to increase their efficiency, but this knowledge had not b... | <urn:uuid:bbafdf9c-b1dd-46cf-9a8a-1a30717902f2> | 3.0625 | 401 | Truncated | Science & Tech. | 21.365924 |
The Ocean: A Whole Lot of Heat
Unlike the atmosphere, the ocean can absorb and release an enormous amount of heat with little change in temperature. As such, the ocean has an enormous impact on Earth's climate, absorbing warmth from the atmosphere during summer and releasing it back during winter.
Ocean Conveyor Belt
W... | <urn:uuid:c5abc163-4f16-4870-b5ae-5d72dd5788de> | 4.28125 | 412 | Knowledge Article | Science & Tech. | 47.939114 |
What creates these long and nearly straight grooves on Mars?
linear gullies, they appear on the sides of some sandy slopes during Martian spring, have nearly constant width, extend for as long as two kilometers, and have raised banks along their sides.
Unlike most water flows, they do not appear to have areas of dried ... | <urn:uuid:6f4f53b5-d24c-41a6-bd21-b92ba8efa6ef> | 3.640625 | 190 | Knowledge Article | Science & Tech. | 37.3175 |
From the outside, the platypus looks like a grade-school art project assembled by a kid too busy making spitballs to pay attention in class. The creature, which is classified as a mammal, has a duck's bill and webbed feet, lays eggs like a reptile, but has fur and rears its young on milk.
Researchers say the platypus g... | <urn:uuid:bdc8598d-2285-4520-8242-8a4307a18939> | 3.34375 | 1,391 | Content Listing | Science & Tech. | 44.400995 |
Almost everyone has experienced the Doppler effect, though perhaps without knowing what causes it. For example, if one is standing on a street corner and an ambulance approaches with its siren blaring, the sound of the siren steadily gains in pitch as it comes closer. Then, as it passes, the pitch suddenly lowers perce... | <urn:uuid:aa1c01fd-e165-4dba-aabb-862ee5513b1a> | 3.921875 | 201 | Knowledge Article | Science & Tech. | 36.677074 |
Atmospheric pressure is defined as the force per unit area exerted against a
surface by the weight of the air above that surface.
In the diagram below, the pressure at point "X"
increases as the weight of the air above it increases.
The same can be said about decreasing pressure, where the pressure at point "X"
decreas... | <urn:uuid:6a5bc51e-7f9a-4090-8e0d-ec93161e7d8b> | 3.953125 | 177 | Knowledge Article | Science & Tech. | 27.69204 |
HTML is a language for describing Web documents and Web applications, along with a set of APIs (application programming interfaces) for interacting with in-memory representations of resources that use the HTML language.
Highlights since the previous AC meeting
On 23 April 2012, the HTML Working Group Chairs announced a... | <urn:uuid:13b15cf3-b187-4bac-8751-ec0e8bf12cc9> | 2.71875 | 662 | Knowledge Article | Software Dev. | 37.2554 |
The Nevada team has created environmental stress sensors by using rd29A and DREB1C promoters to express red fluorescent protein and other bio-fluorescent markers. When induced by environmental stress, plants carrying these genes can easily be detected by the farmer walking through his field or by a plane flying over ac... | <urn:uuid:d43704a4-d1f5-4b5c-bedc-0271924e3c79> | 3.546875 | 172 | Knowledge Article | Science & Tech. | 37.750578 |
Atmospheric rivers are meteorological phenomenon that we humans only discovered in 1998 and which supply about 30-to-50 percent of California's annual precipitation. In the NOAA satellite image above, the atmospheric river is visible as a thin yellow arm, reaching out from the Pacific to touch California. Or, more evoc... | <urn:uuid:3330903a-d6d0-4520-b069-88a437c40d81> | 3.8125 | 402 | Personal Blog | Science & Tech. | 43.90042 |
The La Nina Pacific Ocean cooling event continues to weaken, according to Dr. John Christy, director of the Earth System Science Center at The University of Alabama in Huntsville. Temperatures in the tropics were cooler than seasonal norms for the 12th straight month.
- Earth's early ocean cooled more than a billion ye... | <urn:uuid:8710a65a-867e-4d3b-a3b5-c439e12359ed> | 3.171875 | 185 | Content Listing | Science & Tech. | 37.08 |
Koch's Snowflake 2
From Math Images
Basic DescriptionThe Koch Snowflake was first described in 1904, but it was not until 1967 that some of its most significant properties became apparent. That year, Benoit Mandlebrot published a paper explaining an earlier finding that as the length of a country's border is measured w... | <urn:uuid:7d8d1894-a538-4677-9e62-deeca5896ff2> | 3.765625 | 636 | Knowledge Article | Science & Tech. | 30.477516 |
Features include interactive map, in-depth stories, and more.Download now. »
The week's top five must-sees,
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What do plants, snakes, molds, marine sponges, and cone snails have in common? They have helped develop medicines that save human lives. Biodiversity -- the variety of life on Earth -- is... | <urn:uuid:88061216-bf2c-4cf8-bf98-2bee1ea4acd2> | 2.84375 | 171 | Content Listing | Science & Tech. | 47.177591 |
This will be a simplified guide, as this is high-school level (I'm assuming that means ages ~ 12-16).
You'll need some idea of available resource. Now, Alice Springs has quite a bit of open land around it (it's probably one of the most isolated settlements in the world, isn't it?). So there will be no issue here. Still... | <urn:uuid:d32321eb-334d-4313-a759-f99a34541d77> | 3.28125 | 389 | Q&A Forum | Science & Tech. | 61.361806 |
Edited by William J. Winters1, Thomas D. Lorenson2, and Charles K. Paull3
Download all chapters with cover in a single PDF file for printing.
The northern Gulf of Mexico contains many documented gas hydrate deposits near the sea floor. Although gas hydrate often is present in shallow subbottom sediment, the extent of h... | <urn:uuid:f5f59361-4664-4140-a4ff-e141a0d1e9f3> | 2.890625 | 462 | Academic Writing | Science & Tech. | 55.429286 |
This is the Dynkin Diagram of E8. See what is E8 for a description of the E8 root system. This is a set of roots in R8. The 8 nodes of the Dynkin diagram correspond to 8 roots of the E8 root system, which are a basis of the vector space.
This is a picture of the 248-dimensional Lie algebra of E8. This Lie algebra is a ... | <urn:uuid:7ae5718f-3432-425b-9af2-cd89cb97bd80> | 2.765625 | 325 | Tutorial | Science & Tech. | 74.418212 |
How do astronomers know so much about distant stars, galaxies, and nebulae? By studying light. To determine what stars are made of, astronomers use telescopes that break starlight into its component colors on the electromagnetic spectrum. These colors correspond to specific chemical elements and, as Academy astronomer ... | <urn:uuid:50398be5-1393-4190-9c2e-77d90c7a4211> | 4.40625 | 418 | Knowledge Article | Science & Tech. | 35.625068 |
July 10, 2012
"President Barack Obama has one. Comedian Stephen Colbert has one. Elvis Presley has one. Even computer software magnate Bill Gates has one. And now, Bob Marley–the late popular Jamaican singer and guitarist–also has one. So what is it that each of these luminaries have? The answer: they each have a biolo... | <urn:uuid:70b48343-3dc1-4e44-95f9-9027872d3315> | 2.953125 | 271 | Truncated | Science & Tech. | 46.436282 |
I'm a beginner with this whole programming thing I got my self a new programming book with a a CD with so many questions and I'm stuck with this one could some one show me how the solution would be using stdio.h and please don't make the answer so complicated for a beginner :\
Produce a program which allows the user to... | <urn:uuid:0745c00b-f028-4316-b6f6-a25b44468813> | 3.5625 | 1,179 | Comment Section | Software Dev. | 69.321989 |
Calc includes several commands which interpret vectors as sets of objects. A set is a collection of objects; any given object can appear only once in the set. Calc stores sets as vectors of objects in sorted order. Objects in a Calc set can be any of the usual things, such as numbers, variables, or formulas. Two set el... | <urn:uuid:acf689a4-0836-41d1-b4bc-8f6078e7e235> | 4 | 1,739 | Documentation | Software Dev. | 68.17093 |
If this video doesn’t load – click here.
Henry Markram, director of the Blue Brain project, says the mysteries of the mind can be solved — soon. Mental illness, memory, perception, working memory and fluid intelligence: they’re made of neurons and electric signals, and he plans to find them with a supercomputer that mo... | <urn:uuid:498d544e-0869-46d0-947e-fca2ebabdbb3> | 3.078125 | 350 | Truncated | Science & Tech. | 55.630065 |
How do snowflakes know how to be symmetrical? Are there any circumstances in which they can be persuaded to be asymmetrical?
Answer: The snowflakes that you can see falling slowly from the sky are loose collections of tiny snow crystals. These snow crystals are indeed hexagonally symmetrical and can develop the elegant... | <urn:uuid:fa4d0766-b87a-46a1-94a1-c9ffe070407b> | 3.828125 | 214 | Truncated | Science & Tech. | 27.267841 |
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What drives monarch butterflies to undertake a mass migration, traveling thousands of miles to pine groves in Mexico? New research published this week in the journal PLOS Biology takes a look at a complex circadian clock mechanism in the butterfly brain, a molecular tool that allows monarch butterflies to use the posit... | <urn:uuid:05b2b311-47f4-4364-963a-db1984c0a34d> | 3.265625 | 133 | Truncated | Science & Tech. | 30.7615 |
9th October 2002
Input and output
Matrix algebra and manipulation
Writing for posterity
This section concentrates on making your programs more error-free. It emphasises the importance of structured design and testing of programs, and making sure at each stage that you are clear about what you are doing. The algebra of ... | <urn:uuid:d4bc07b8-0948-4680-b421-5e06922d2ddf> | 3.453125 | 3,491 | Documentation | Software Dev. | 48.560962 |
The reason that Europa is warm is because of tides. An example of what happens is shown in this drawing of the Earth and Moon. In this picture, the Earth is pulling on the Moon, and the Moon is pulling on the Earth with gravity. The Moon pulls more strongly on the side of the Earth facing the Moon than on the side faci... | <urn:uuid:bd8bbc87-3bea-4680-8f0e-2279f4c96712> | 4 | 209 | Knowledge Article | Science & Tech. | 65.94791 |
The permanently frozen ground around our poles holds, it seems, a huge amount of methane, a very powerful greenhouse gas. Climate scientists wonder what will happen if there is a major melt. And there are signs of such a melt taking place, including methane bubbling up from Alaskan lakes (above).
The scary thing about ... | <urn:uuid:7a276dcf-7af7-4272-911a-191a32c90dfc> | 2.8125 | 122 | Personal Blog | Science & Tech. | 50.435868 |
The problem of dealing with Geological time and having events that occur in very short intervals thereof, is that for those of us on a faster life schedule, “almost instantly” can still be a period of years.
That thought has struck me quite frequently as, over the past year, I have watched the earthquakes that are happ... | <urn:uuid:87c37667-21f5-408f-9b5d-080e769a6a4e> | 2.796875 | 430 | Personal Blog | Science & Tech. | 43.506821 |
MODERATOR INTERJECTION: Post moved from this thread.
I see this thread could use an update about WMAP.
From NASA's own site about WMAP.
Sound waves in the early universe?
SOUND is the KEY, like I have been suggesting all along.Much of what WMAP reveals about the universe is because of the patterns in its sky maps. The ... | <urn:uuid:e1ae0ff7-77fe-4bb1-8c96-aa0e87d47d23> | 2.75 | 213 | Comment Section | Science & Tech. | 58.741524 |
As the title suggest, a new species of teleost has been found out, it was collected, “sort of” unearthed, from the sand bed of a small river in south western India, thus named “ammophila” which means “sand loving”.
This species is for now known only from this location, and grows not more than 3 centimeters. It is the t... | <urn:uuid:23b6ae50-4a45-4678-a62c-94725ba4e1c2> | 3.109375 | 590 | Academic Writing | Science & Tech. | 44.610446 |
Search Loci: Convergence:
M. is execrable, but
Mr. C. is (x +
In N. Rose, Mathematical Maxims and Minims, Raleigh NC: Rome Press Inc., 1988.
Van Schooten's Ruler Constructions
Solution to Problem V
Problem V: Given an indefinitely long straight line AB and a point C on it, to draw a line CF which is perpendicular to th... | <urn:uuid:dec528be-89a4-46a7-bcd2-d19a70d1ae80> | 2.859375 | 150 | Academic Writing | Science & Tech. | 75.073231 |
Hosted by The Math Forum
Problem of the Week 1046
A Triumphal Arch
Suppose you have a budget to build an arch using 110 bricks that you are to purchase. The arch is made simply from two vertical columns of bricks that go up to the same height. A lintel is then placed over the top, but that does not use any bricks and i... | <urn:uuid:4fa84267-203a-4dfa-8971-9d69a0e574d8> | 3.375 | 282 | Tutorial | Science & Tech. | 65.630745 |
Introduction to Data Binding
Microsoft Internet Explorer 4.0 and later enables content providers to develop data-centric Web applications that support retrieval and update through native data binding facilities. The use of HTML extensions and pluggable data source objects (DSOs) makes data-driven pages easy to author, ... | <urn:uuid:037a7ad5-6b5b-4ab6-8060-c5ff224e2068> | 2.953125 | 612 | Documentation | Software Dev. | 33.157077 |
Epitaxial graphene on metals
Graphene (an atomic layer of carbon arranged in a honeycomb lattice) may be prepared in epitaxy on metal surfaces. First studies date back to the 1960s:
Very high quality graphene may be prepared on metals. Such samples are well suited to the study of graphene's properties with the help of ... | <urn:uuid:63546d73-69b1-4d8d-87eb-2d07c78d27a3> | 3.203125 | 296 | Academic Writing | Science & Tech. | 24.632056 |
In physics, a wave is a method of energy transportation.
Mechanical waves require an environment to travel through - called a medium. The medium's density, elasticity and temperature determine velocity. Matter with the most elasticity, least density and highest temperature would create the fastest wave.
Transverse wave... | <urn:uuid:c0384e7e-a7cc-4b9e-b51a-9459218d8d23> | 4.28125 | 474 | Knowledge Article | Science & Tech. | 34.227153 |
In the default mode of operation, each character that is typed is inserted into the text, with the existing characters being shifted as appropriate. In overwrite mode, each character that is typed deletes an existing character in the text.
When in overwrite mode, a character can be inserted without deleting an existing... | <urn:uuid:d39b34db-bdfd-4703-8ef0-1c816aa3125c> | 3.453125 | 264 | Documentation | Software Dev. | 37.869394 |
American biochemist who, with John E. Walker, was awarded the Nobel
Prize for Chemistry in 1997 for their explanation of the enzymatic process
involved in the production of the energy-storage molecule adenosine
triphosphate (ATP), which fuels the metabolic processes of the cells
of all living things. (Danish chemist Je... | <urn:uuid:dc7ade13-0f7c-455a-a8d1-627f5025959c> | 3.875 | 349 | Knowledge Article | Science & Tech. | 42.315882 |
A Mutualistic Root Ecosystem article - botany, plant physiology (Jan/14/2008 )
The rhizosphere is a very thin line of 'mucus' seen in plant roots containing bacteria and fungal hyphae mixed in a soup of root excretions containing nutrients for the beneficial microorganisms. The bacteria and fungi give the plant other n... | <urn:uuid:6496fd27-1b29-4bab-b078-3853e61065a0> | 3.03125 | 125 | Comment Section | Science & Tech. | 30.260239 |
How does a spacecraft change course?
In order to know where a ship is, NASA needs to know two things: how far it is from Earth and its location in space. Generally, NASA uses the downlink, or radio signal from a spacecraft to a radio telescope in the DSN, to tell where it is.
The distance between Earth and the ship is ... | <urn:uuid:b46c48ff-3399-4445-a292-5ef8ef4166b8> | 4.34375 | 475 | Tutorial | Science & Tech. | 63.957257 |
Aluminum 'nanometal' is strong as steel
Raleigh, N.C. (UPI) Sep 8, 2010
U.S. researchers say they've learned how make an aluminum alloy -- a mixture of aluminum and other elements -- that's as strong as steel.
North Carolina State University scientists say the search for ever lighter yet stronger materials is important... | <urn:uuid:7ecd9ea4-fccf-4578-b65a-8a683d9c4403> | 3.046875 | 475 | Truncated | Science & Tech. | 33.165922 |
The Role of Macroalgal Species as Bio-indicators of Water Quality
in Bermudian Karstic Cave Pools
Bermuda consists of a series of mid-ocean islands
located 1000 km (600 miles) off the eastern coast of the United States.
Geologically, the islands are composed of highly cavernous limestone overlying a
volcanic seamount. ... | <urn:uuid:ef276e49-2e7e-42e6-8f2c-0ca263c9116a> | 3.3125 | 398 | Academic Writing | Science & Tech. | 23.748385 |
How might one predict the arrangement of charges on a
if the symmetry arguments that make Gauss's Law so useful are not available?
On the left, you'll find the challenge: Calculate the negative (cyan) charge-density σ induced on a grounded sphere of radius R when a positive (red) point charge q is a distance r from the... | <urn:uuid:00f8af3a-4d37-46a2-8e68-486f5e0bba38> | 3.875 | 616 | Q&A Forum | Science & Tech. | 42.792604 |
Cosmic gamma ray bursts (GRBs) were discovered by accident in the late 1960's by satellites designed to detect gamma rays produced by atomic bomb tests on Earth. The GRBs appear first as a brilliant flash of gamma rays, that rises and falls in a matter of minutes. These bursts are often followed by afterglows at X-ray,... | <urn:uuid:b65c88d2-df62-4a18-8fcb-48407da4b20f> | 4.625 | 641 | Knowledge Article | Science & Tech. | 48.641074 |
What will happen when the fragments hit Jupiter?The impacts will be centered on June 19, 1994; the first is expected late at night on July 16, with an impact, on average, about every six hours. All the fragments will enter Jupiter's atmosphere at an angle of 42 degrees from the vertical and impact near a latitude of 44... | <urn:uuid:51434d67-064e-4483-afe4-9d0e4833df76> | 3.921875 | 1,495 | Knowledge Article | Science & Tech. | 39.471514 |
As I discussed in a past posting on uranium enrichment, the uranium we dig out of the ground is unable to sustain a nuclear chain reaction without a lot of coaxing – it has to be immersed in heavy water or surrounded by graphite as opposed to natural (light) water. This is why we enrich uranium – boost the amount of fi... | <urn:uuid:22e407ff-cb63-41d1-b413-aa5fa50d1c0e> | 3.125 | 1,306 | Personal Blog | Science & Tech. | 42.46251 |
Source: Science Daily
May 23, 2012
"Most people are fascinated by the colorful and exotic coral reefs, which form habitats with probably the largest biodiversity. But human civilization is the top danger to these fragile ecosystems through climate change, oxygen depletion and ocean acidification. Industrialization, def... | <urn:uuid:3d75b2d9-98d3-450b-aca8-807a5e49cebc> | 4 | 299 | Truncated | Science & Tech. | 26.8525 |
|Sunday, Jan 15, 2012 - 2:30 AM
"Earth's Changing Climate"
Tropical glaciers are the world's thermometers; their melting is a signal that human activities are warming the planet. A California project tries to predict whether natural ecosystems will be able to absorb enough additional carbon dioxide from the atmosphere ... | <urn:uuid:68d4525f-4392-4071-87d8-155cf3fae4dc> | 2.828125 | 105 | Content Listing | Science & Tech. | 39.445 |
replace string in a file
josef.pktd at gmail.com
Mon Mar 17 17:03:07 CET 2008
On Mar 16, 10:35 pm, sturlamolden <sturlamol... at yahoo.no> wrote:
> On 15 Mar, 21:54, Unknown <cantabile... at wanadoo.fr> wrote:
> > I was expecting to replace the old value (serial) with the new one
> > (todayVal). Instead, this code *add... | <urn:uuid:83468791-7fcb-412e-863f-8e587c3a83e5> | 2.765625 | 371 | Comment Section | Software Dev. | 78.352311 |
The Amazing Unit Circle
Reference Angles in Quadrant III
Reference angles are used to determine the values of the trigonometric functions in the second, third and fourth quadrants, in particular, for the "nice" angles. The reference angle for an angle θ is the smallest angle φ from the (positive or negative) x-axis to ... | <urn:uuid:bf2e8b40-eb91-4a77-bed3-6bcccb83c711> | 4.21875 | 396 | Tutorial | Science & Tech. | 69.28486 |
Did you know that the average human body has about 10 times as many microbial cells as human cells.
AMAZING! Read this for more information.
Tags: Biology, Microbiology, Science
This entry was posted on August 22, 2007 at 10:18 pm and is filed under Biology, Microbiology, Science. You can follow any responses to this e... | <urn:uuid:525f6739-a599-4a58-af7e-ba5d8b1abbb4> | 2.984375 | 226 | Personal Blog | Science & Tech. | 69.195957 |
Identifying what kind of bulge a given galaxy has is very relevant if we wish to understand the formation and evolutionary processes such galaxy went through, until it reached the physical state presented to us today. While a classical bulge, i.e. component number 2 in the list above, suggests a more violent history, i... | <urn:uuid:d534bc7a-923f-4a21-acab-798168431d23> | 3.15625 | 2,251 | Academic Writing | Science & Tech. | 52.13489 |
Effects of Global Warming on Precipitation in Guangdong Province, China
Liu, D., Guo, S., Chen, X. and Shao, Q. 2012. Analysis of trends of annual and seasonal precipitation from 1956 to 2000 in Guangdong Province, China. Hydrological Sciences Journal 57: 358-369.
Specifically, Liu et al. analyzed "trends of annual, se... | <urn:uuid:69c16809-fbb9-4f34-a9e6-f80b8ae62ab5> | 2.734375 | 412 | Academic Writing | Science & Tech. | 39.811687 |
Why is it not possible to store windfarm energy in battery banks? A lot of energy isn't being used when wind farms are at peak and we have no way of storing it. This is wasteful. So why don't we use battery banks?
closed as off topic by Sklivvz♦, Ϛѓăʑɏ βµԂԃϔ, Manishearth♦ Dec 28 '12 at 16:28
Questions on Physics Stack ... | <urn:uuid:a2157b31-4dfd-47aa-b16e-7785db632630> | 2.875 | 597 | Q&A Forum | Science & Tech. | 55.104581 |
The buff-tail bee.
Bumblebee declines, microbes, and amazing birds
13 June 2011
This week in the Planet Earth Podcast: what UK farmers are doing to protect the country's vanishing bumblebees, butterflies and other pollinating insects; how scientists are trying to figure out how many types of microbes there are on our p... | <urn:uuid:519a74ff-fbf5-4340-a3a9-eb6cbe819566> | 3 | 392 | Truncated | Science & Tech. | 52.58559 |
Description of Difflugia lacustris:
The shell is transparent or hyaline, elongate, cylindrical or slightly pyriform. It is composed of small to medium pieces of quartz, diatom frustules and small siliceous flagellate cysts blended together to form a thin structure intermediate between smooth and rough. Only small areas... | <urn:uuid:dc753a10-d7dc-4ea1-ac10-0d292bc6cb60> | 2.703125 | 234 | Knowledge Article | Science & Tech. | 56.396061 |
NOAA Teacher at Sea
Aboard R/V Savannah
July 7 – 18, 2012
Mission: SEFIS Reef Fish Survey
Location: Atlantic Ocean, off the coast of Daytona Beach, Florida
Date: July 13, 2012
Latitude: 29 ° 19.10’ N
Longitude: 80 ° 24.31’ W
Air Temperature: 28.3° C (82.94°F)
Wind Speed: 12 knots
Wind Direction: from Southeast
Surface ... | <urn:uuid:f9f267bb-36cd-4356-be8b-57d896dbf3cb> | 2.90625 | 1,095 | Personal Blog | Science & Tech. | 67.456828 |
APS Division of Fluid Dynamics 2012 Gallery of Fluid Motion Feature Summary
- From Physics Research
APS Division of Fluid Dynamics 2012 Gallery of Fluid Motion
- This image is a high-resolution computer simulation of the head-on collision of two tiny drops, one moving up and one moving down. The drops approach each oth... | <urn:uuid:7d2fb084-1648-4e92-ba29-9742dca238b1> | 2.765625 | 237 | Knowledge Article | Science & Tech. | 40.659929 |
In this simulation the left boundary is kept at one degree higher temperature than the right boundary. On the top boundary the variations of surface tension due to temperature differences on the surface induce a tangential force on the flow. This effect is called thermocapillary convection or Marangoni convection.
The ... | <urn:uuid:60ffa233-120d-4832-b158-c853f6a28f61> | 3.015625 | 182 | Documentation | Science & Tech. | 27.50875 |
Energy from Wood
eat wood to get energy to live and reproduce. Termites feed on damp
rotting trees, and occasionally on houses. Trees build themselves
by using energy from the sun to make a complex sugar called cellulose.
The energy remains trapped in the wood until the tree dies. Termites
chew through the wood to eat ... | <urn:uuid:c25902fa-8b6f-4a2f-83cf-8b3df980dad2> | 3.265625 | 91 | Knowledge Article | Science & Tech. | 52.936413 |
Wave climate in the Baltic Sea 2010
Due to the ice conditions in 2010 wave measurements could be carried on through the whole year only in the open sea area of the Southern Baltic Proper. In January the wave climate was rougher than usual in the Western Baltic Proper while further north, at stations where measurements ... | <urn:uuid:817a1fa3-b1da-42bd-809c-ff6fd747f7f3> | 3.03125 | 3,157 | Knowledge Article | Science & Tech. | 58.559169 |
|MadSci Network: Chemistry|
What exactly is dipole movement and what is its relationship to hydrogen
Dipole moment is due to the degree of charge separation in a molecule. How it is calculated (or how the degree of charge separation can be determined from a dipole moment, since that's what's obervable) is given in most... | <urn:uuid:d32f61b8-05db-4680-9f8b-ed806dfbaa66> | 3.734375 | 437 | Knowledge Article | Science & Tech. | 21.042721 |
Answering this need for Earth observation capacity several Earth observation systems have been built. Agenda 21, G8 meetings and other international declarations (the latest from Rio +20) lend political support and reference for this capacity building. Below you will find the description of a handful of Earth observati... | <urn:uuid:51557a61-2450-4142-b51c-1ebd9f000e13> | 3.078125 | 1,389 | Nonfiction Writing | Science & Tech. | 27.03413 |
Bat biologist Nickolay Hristov, of UNC’s Center for Design Innovation and Winston-Salem State University, develops new techniques for filming and visualizing bats and the caves they occupy. Some of the tools in his kit include a long-range laser scanner--for modelling bat cave morphology--and portable thermal cameras--... | <urn:uuid:0f8b84c3-5658-4933-91d0-10afba417fe0> | 2.875 | 184 | Truncated | Science & Tech. | 45.256138 |
Web edition: July 1, 2011
Print edition: July 16, 2011; Vol.180 #2 (p. 4)
CERAMICS PROVED BEST FOR POWER GENERATORS — Ceramics have proved to be the best material for checking the white-hot stream of gases in a new kind of electric power generators. Westinghouse Electric Corporation scientists, Pittsburgh, Pa., believe... | <urn:uuid:287ff4b5-7c2a-43fa-915e-ff4ef24f01bf> | 3.1875 | 176 | Truncated | Science & Tech. | 35.479286 |
Web edition: June 22, 2012
About 300 million years ago, long before the first dinosaurs appeared, a different type of oversized critter inhabited Earth: giant insects. Scientists suspect bugs grew bigger then because the atmosphere contained more oxygen than it does now. For example: Wings of one ancient dragonfly meas... | <urn:uuid:ebd7843b-dceb-4173-9247-8ed3765665ba> | 3.890625 | 155 | Truncated | Science & Tech. | 55.495117 |
Pineapple (Ananas comosus var. comosus), is an important tropical non-climacteric fruit with high commercial potential. Understanding the mechanism and processes underlying fruit ripening would enable scientists to enhance the improvement of quality traits such as, flavor, texture, appearance and fruit sweetness. Altho... | <urn:uuid:7bef34c0-adb6-4b1b-8245-39660aee0e80> | 2.734375 | 306 | Academic Writing | Science & Tech. | 24.491387 |
NEW DELHI (AP) - Delegates from nearly 200 countries are working to implement an agreement for protecting Earth's ecosystems at a biodiversity conference in southern India.
The U.N. conference in Hyderabad is discussing progress toward achieving goals set in the Convention on Biological Diversity and the Nagoya Protoco... | <urn:uuid:cf258119-fbbe-4e69-92f4-fc3cb8c83545> | 2.859375 | 193 | Truncated | Science & Tech. | 33.451638 |
An indispensible tool for both learning and programming Erlang.
Submitted by: LRP; July 30, 2011
You don’t need to know Erlang or use the Erlang shell to create simple Zotonic websites. But for Zotonic application development and debugging, Erlang programming skills are essential.
Erlang is not that hard to learn. Seve... | <urn:uuid:d5f4813a-9e4a-45e2-ad8a-e31f7de47dde> | 3.078125 | 546 | Tutorial | Software Dev. | 78.796795 |
The Trusty Jackknife
Method identifies outliers and bias in statistical estimates
by I. Elaine Allen and Christopher A. Seaman
Outliers are a continual source of problems when analyzing data. A few questionable data points can skew your distribution, make significant results seem insignificant and generally ruin your d... | <urn:uuid:5ceacc57-0943-4ccf-a82f-5fd6171a077d> | 3.53125 | 1,630 | Nonfiction Writing | Science & Tech. | 37.848048 |
|Constructor Attributes||Constructor Name and Description|
Computes the convex hull of a Geometry.
Computes the convex hull of a Geometry. The convex hull is the smallest convex Geometry that contains all the points in the input Geometry.
Uses the Graham Scan algorithm.
getConvexHull()Returns a Geometry that represents... | <urn:uuid:7943f526-ce20-490f-abd1-26f089314e61> | 3.5 | 159 | Documentation | Software Dev. | 47.678839 |
|Oracle9i Java Developer's Guide
Release 1 (9.0.1)
Part Number A90209-01
API stands for Application Programming Interface. As applied to Java, an API is a well-defined set of classes and methods that furnish a specific set of functionality to the Java programmer. JDBC and SQLJ are APIs for accessing SQL data.
The set o... | <urn:uuid:f145b8a0-bff4-4ded-819c-4eb0b13fec10> | 3.0625 | 1,621 | Documentation | Software Dev. | 38.538268 |
Photograph by Raul Touzon, National Geographic
Coral reefs are complex structures built by tiny organisms called coral polyps, which are kin to jellyfish and sea anemones. Polyps attach themselves to sunken rocks at the edges of islands or continents. Their limestone skeletons connect with one another in massive number... | <urn:uuid:602e6139-2e75-4b75-89e3-476aaff99a6f> | 3.734375 | 94 | Knowledge Article | Science & Tech. | 34.177003 |
This is the first GIF of an Atom, shot with a new Quantum Laser Camera.
You’re looking at the first ever direct observation and recording of an atom and its orbital structure.
Hydrogen atoms make up 75% of the mass in the universe, but they’ve always been too small to actually see.
A team of scientists held a hydrogen ... | <urn:uuid:24e8a596-fb49-4fb6-b254-fcd626eb4d17> | 3.25 | 183 | Truncated | Science & Tech. | 56.392687 |
Since October 2010 and after successfully completing the requisite reviews, the OCO-2 mission has been in implementation to meet the new launch date. OCO-2 will be based on the previously launched Orbiting Carbon Observatory (OCO) satellite and will carry a single instrument, consisting of three high-resolution grating... | <urn:uuid:e297127f-89ed-4bad-a3eb-75763326c4b2> | 3.484375 | 582 | Knowledge Article | Science & Tech. | 26.198278 |
Climate change is not an us-and-them problem. When the very planet is at stake, there can only be us-and-us.
By Ryan McGreal
Published October 07, 2005
The Paradise ice caves at Mount Rainier, shown here in 1982, melted away by fall 1991. The Nisqually glacier has drawn back nine-tenths of a mile since early in the las... | <urn:uuid:059d2814-71ec-4865-8307-5a0586413d79> | 2.9375 | 3,224 | Nonfiction Writing | Science & Tech. | 41.935604 |
Life Versus the Volcanoes
The underwater volcanoes are part of a larger structure of tar deposits in the area, and although the volcanoes themselves are not active, oil has been bubbling steadily out of nearby seeps in the underground rock for thousands of years. Just sail some 10 miles offshore and the surface of the ... | <urn:uuid:b4597dbb-4a51-486e-9c7a-e76d01be9460> | 3.359375 | 796 | Truncated | Science & Tech. | 44.231552 |
A star in the Draco constellation was recently murdered by a black hole.
Not just murdered, but shredded and swallowed -- a helpless star, by a perverse, serial-killing black hole!
Now, the actual findings, as published in the peer-reviewed journal Nature, were just as exciting, but a little bit too thinky for us avera... | <urn:uuid:a4146e3a-612b-42d8-8670-0df2119df639> | 3.0625 | 631 | Personal Blog | Science & Tech. | 47.956235 |
Marilley, L., Hartwig, U.A. and Aragno, M. 1999. Influence of an elevated atmospheric CO2 content on soil and rhizosphere bacterial communities beneath Lolium perenne and Trifolium repens under field conditions. Microbial Ecology 38: 39-49.
What was done
A FACE experiment, located in Switzerland, was began in 1993 to s... | <urn:uuid:b64f5fa2-b63e-4826-a8aa-40ec892723c8> | 3.140625 | 625 | Academic Writing | Science & Tech. | 22.843423 |
here is the directory structure: C:\ dirA\dirB\dirC\A.java when i try to compile using the command 1:-c:\javac -cp dirA\dirB\dirC\A.java it displays the error message javac: no source files but when i pass this command 2:-c:\java -cp \dirA \dirA\dirB\dirC\A.java it compiles successfully. what is the difference between ... | <urn:uuid:074fd3e6-9013-47aa-b49b-1880fddf679d> | 2.84375 | 223 | Q&A Forum | Software Dev. | 74.275261 |
Appearance The regal fritillary is one of temperate North America's most striking butterflies. Almost as large as the familiar monarch butterfly, it is instantly recognizable from above by its black-flecked reddish-orange forewings and blue-black hind wings. The wing undersides have a bold pattern of large, triangular ... | <urn:uuid:ed4907ae-e850-45cc-a61e-a91aa971ccc5> | 3.53125 | 677 | Knowledge Article | Science & Tech. | 40.923013 |
Key to the Laphria of Arkansas and the East
This key was created by modifying the key to the Laphria that appears in the 1975 paper "A Taxonomic Study of the Asilidae of Michigan" by Norman T. Baker and Roland L. Fischer. Species that do not occur here were removed and species that possibly occur here or in adjacent st... | <urn:uuid:a73ba12e-b28e-47cb-b412-b4b230d8e47c> | 2.875 | 1,555 | Structured Data | Science & Tech. | 55.169591 |