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
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Bowman, DMJS and Balch, JK and Artaxo, P and Bond, WJ and Carlson, JM and Cochrane, MA and D'Antonio, CM and DeFries, RS and Doyle, JC and Harrison, SP and Johnston, F and Keeley, JE and Krawchuk, MA and Kull, MA and Marston, JB and Moritz, MA and Prentice, IC and Roos, CI and Scott, AC and Swetnam, TW and van der Werf... | <urn:uuid:c9954399-5958-4bc3-92d6-3d057bd396c5> | 3.1875 | 294 | Academic Writing | Science & Tech. | 43.835953 |
A near earth object is an object that has the possibility of hitting earth. They are in a categoriy of objects in our solay system called minor planets.
There are 596595 minor planets known to exist according to the Minor Planet Center. http://www.minorplanetcenter.net/ a Smithsonian Project Funded by a grant from NASA... | <urn:uuid:8e433d23-9604-4221-8760-975a31046285> | 3.53125 | 1,215 | Personal Blog | Science & Tech. | 61.392551 |
I'm learning the Python programming language, and I've come across certain things I don't fully understand. I'm coming from a C background, but I never went far with that either.
What I'm trying to figure out is:
In a method:
def method(self, blah): def __init__(?): .... ....
What does self do? what is it meant to be? ... | <urn:uuid:7d2338d9-c3b5-4619-ab63-36d30ea40128> | 2.75 | 127 | Q&A Forum | Software Dev. | 92.429543 |
Fusion is done by our sun really, really well and for free. Here on Earth in reactors … not so much. And so the famous saying, “fusion energy is fifty years away — and always will be.”
I have never been a big fan of earth-bound fusion, in part because I was an M.I.T. undergrad in October 1983 when Prof. Lawrence Lidsky... | <urn:uuid:4547d5ad-c7de-47ca-99d9-061c2a4b2895> | 2.703125 | 710 | Nonfiction Writing | Science & Tech. | 47.966034 |
Phytoplankton bloom near Falkland Islands, South Atlantic Ocean
Jacques Descloitres, MODIS Land Rapid Response Team, NASA/GSFC
To the north and east of the Falkland Islands, shown here just to the left of center, the South Atlantic Ocean is vibrant with color. This true-color MODIS image from November 13, 2001, shows t... | <urn:uuid:5fc590d2-9dab-4b72-a245-4ae1fcc471d8> | 4 | 241 | Knowledge Article | Science & Tech. | 30.495588 |
Aim to address the evolution of galaxy populations in clusters. Comparison can then be made with n-body model data.
multicolour optical survey data sets (e.g. DPOSS)
Clusters of galaxies can be used to trace distribution of matter in the universe over large scales. Clusters are typically X-ray (see e.g. XrayGalaxyClust... | <urn:uuid:3e9550b2-fd4b-4d46-a422-f8809661671b> | 2.71875 | 839 | Knowledge Article | Science & Tech. | 47.30601 |
Keep Watching the Ice
Meet the satellites bringing data to the discussion of global warming
- By Ben Iannotta
- Air & Space magazine, September 2006
(Page 4 of 7)
NASA had planned to run ICESat’s three lasers in sequence until they burned out—ideally after at least five years of continuous measurements. But ICESat mana... | <urn:uuid:4e3d1d08-ff94-480a-be81-2ae7a4b35c2c> | 2.9375 | 707 | Truncated | Science & Tech. | 33.079221 |
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With an accout for my.bionity.com you can always see everything at a glance – and you can configure your own website and individual newsletter.
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The Miller-Urey experiment (or... | <urn:uuid:216bcb38-bb8b-4206-ab79-6f7dfdaf35f8> | 3.90625 | 2,286 | Knowledge Article | Science & Tech. | 29.220304 |
APACHE COMES IN ready-to-install binary packages, which for many applications is perfectly adequate. Apache also comes with source code, making it possible to build the entire server from scratch with a suitable compiler.
However, even if you decide to start off by installing a binary distribution, all binary Apache di... | <urn:uuid:65191625-5e6b-4622-83a7-cb8de4932ee5> | 2.9375 | 1,503 | Documentation | Software Dev. | 59.788484 |
The Basic Chemistry of Acids and Bases
Part of the Chemistry For Dummies Cheat Sheet
A lot of chemistry requires you to understand the difference between acids and bases. An acid is a substance that donates an H+ ion to another chemical species called a base. A base is a substance that accepts (combines with) an H+ ion... | <urn:uuid:9e7a92b7-5234-44fd-b4ba-28d07ece857f> | 4.09375 | 203 | Tutorial | Science & Tech. | 64.897623 |
RNA Triphosphatase Comes in Two Flavors
RNA triphosphatase is an essential mRNA processing enzyme that catalyzes the first step in mRNA cap formation. The RNA triphosphatases are not conserved among eukarya and fall into at least 2 mechanistically and structurally distinct families:
- the divalent cation-dependent RNA ... | <urn:uuid:492eeee4-2783-4fc5-aaaf-3481bebc7ee1> | 2.875 | 1,878 | Academic Writing | Science & Tech. | 27.348421 |
Joined: 16 Mar 2004
|Posted: Fri Sep 05, 2008 3:00 pm Post subject: Bacteria and nanofilters the future of clean water
|Bacteria and nanofilters the future of clean water technology
Bacteria often get bad press, with those found in water often linked to illness and disease. But researchers at The University of Nottingh... | <urn:uuid:69a43e00-fd7c-47db-9efa-85e5b11b8e9c> | 2.96875 | 673 | Comment Section | Science & Tech. | 22.402431 |
Earth Observatory: Etosha Pan, Namibia
This astronaut photograph shows the white, salt-covered floor in the northwest corner of the Etosha Pan, a great dry lake in northern Namibia. Two rivers, the Ekuma and Oshigambo, transport water from the north down to the Pan. In a relatively rare event shown in this image, water... | <urn:uuid:6d9135a5-f74d-4569-ab87-a57c6ac30bed> | 3.921875 | 414 | Knowledge Article | Science & Tech. | 45.812273 |
Ions in action
Make pieces of paper fly through the air and stick onto a balloon.
What you need:
A sheet of paper
A hole punch
What to do:
Inflate the balloon to a size that fits easily in your hand.
Tie a knot in the end of the balloon.
Use the hole punch to cut several small circles from the sheet of paper.
Rub the b... | <urn:uuid:33d9e125-377f-4940-bb8b-78aba2f31413> | 4.03125 | 397 | Tutorial | Science & Tech. | 65.825107 |
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Nearly a year after announcing the discovery of water molecules on the moon, scientists say there's more than just water hiding in cold lunar craters.
FULL STORY at
You are currently subscribed to snglist as: nasascience@xxxxxxxxxxxxxx.
[Site ... | <urn:uuid:021d30b4-3bc6-426c-83f7-cd0bd540fc3d> | 2.703125 | 155 | Comment Section | Science & Tech. | 31.187199 |
Multi-celled organisms of the kingdom Animalia with eukaryotic cells (cells with distinct nuclei containing genetic material and bounded by thin membranes) that are heterotrophic (obtaining energy from organic substances produced by other organisms).
Brief descriptions of programs of research on aquatic nonindigenous p... | <urn:uuid:5b8ceec9-70af-4b43-a138-d05416b2bd86> | 2.96875 | 1,222 | Content Listing | Science & Tech. | 25.479036 |
Lake Como, in Northern Italy
Sometimes, the collective knowledge of generations of locals is just as valuable as a network of high-tech sensors. That’s what scientists studying the fluid dynamics of Lake Como in the Italian Alps found, when they began to interview fishermen.
The team from the University of Western Aust... | <urn:uuid:d8adcab0-f2ff-456a-a828-3aed77e79766> | 3.78125 | 694 | Content Listing | Science & Tech. | 40.188461 |
One of the greatest ironies of physics is that to see the smallest things in the Universe we need huge machines. The Compact Muon Solenoid detector (or just CMS for short) is one of two extremely complex – and very, very large – pieces of equipment used by CERN’s Large Hadron Collider (LHC) in Geneva to sift through th... | <urn:uuid:a6db655b-b937-43ba-8c20-4d7d2125cc11> | 3 | 1,251 | Personal Blog | Science & Tech. | 64.205871 |
I was thinking of the immutability of eigenvectors and the immutability of certain vectors when projected and realized these two qualities are one in the same. Eigenvectors can be viewed and explained in terms of a projection matrix, which may be a more intuitive and easier way to understand eigenvectors than is common... | <urn:uuid:32ce55bd-a681-4dde-b5c4-c2cbaf8c4eca> | 3.203125 | 692 | Knowledge Article | Science & Tech. | 47.660096 |
Just as in any area of mathematics, different parts of the subject have different strengths. The theory of Reverse Mathematics investigates these strengths by determining for a large number of mathematical theorems, including theorems arising in the development of first order logic, the weakest axioms that are able to ... | <urn:uuid:7c8bc082-5317-410a-86d3-2a8231f25136> | 2.921875 | 402 | Q&A Forum | Science & Tech. | 31.670843 |
Hubert Staudigel, Anthony Koppers, Scripps Institution of Oceanography, Cecil H. and Ida M. Green, Scripps Institution of Oceanography, Cecil H. and Ida M. Green
The EarthRef web site contains several online databases, downloadable modeling tools, and more. The databases include GERM (Geochemical Earth Reference Model)... | <urn:uuid:7ee170b6-3af9-4138-a08f-40b795558028> | 2.71875 | 309 | Knowledge Article | Science & Tech. | 28.840678 |
Limits of sets and Creation of limits
We know that the category has equalizers and all (small) products, so by the existence theorem we know it is complete. However, it will be useful to have an explicit calculation of all small limits at hand. We’ll find this by walking through the existence theorem in this category.
... | <urn:uuid:9145fe18-8539-44f4-8f5d-4a8775c20481> | 2.8125 | 661 | Academic Writing | Science & Tech. | 57.062786 |
The UK has a very large population for the amount of geographical space they have available, so energy production has always been somewhat difficult. Aggravating this situation is the fact that the UK doesn’t have many natural resources like oil or coal where they can product their own energy independently – they need ... | <urn:uuid:69dff557-6dc7-4e97-94b2-c873933b33b1> | 3.0625 | 369 | Personal Blog | Science & Tech. | 42.96169 |
Friday 17 May
Barbastelle bat (Barbastella barbastellus)
- The scientific name for the barbastelle bat Barbastella means ‘star beard’, refering to the white hairs that grow from the bats lip.
- Up to 30 old trees can be used by one colony of barbastelle bats through the summer season.
Barbastelle bat fact file
- Find o... | <urn:uuid:0e3fffd6-332d-4346-addb-a2b34270bbba> | 3.609375 | 1,729 | Knowledge Article | Science & Tech. | 36.442193 |
A minute is:
- a unit of angle and time, 1/60th of an hour of right ascension. It is then known as the minute of right ascension, and can be further divided into 60 seconds of right ascension.
The symbol for a minute of time (or of right ascension) is min.
The symbol for a minute of arc is a prime (′). For example, fif... | <urn:uuid:67ae8d30-d8ad-4537-bf74-99f73786394b> | 3.375 | 189 | Knowledge Article | Science & Tech. | 57.962809 |
saturationArticle Free Pass
saturation, any of several physical or chemical conditions defined by the existence of an equilibrium between pairs of opposing forces or of an exact balance of the rates of opposing processes. Common examples include the state of a solution left in contact with the pure undissolved solute u... | <urn:uuid:2165f9c8-0fb0-49ac-ae1e-f3fca8689dab> | 3.46875 | 261 | Knowledge Article | Science & Tech. | 26.569228 |
died Dec. 13, 1935, Lyon
French chemist and corecipient, with Paul Sabatier, of the 1912 Nobel Prize for Chemistry for his development of the Grignard reaction. This work in organomagnesium compounds opened a broad area of organic synthesis.
In 1898, while a student under Philippe Barbier at Lyon, Grignard began his pr... | <urn:uuid:fc1b71f2-5646-4bb3-b04e-6e744d884adc> | 3.3125 | 251 | Knowledge Article | Science & Tech. | 45.010786 |
The National Oceanic and Atmospheric Administration (NOAA) announced today that the official list of billion dollar weather and climate disasters in 2011 is now up to 12, smashing the old record of nine, set in 2008. The total damage from these 12 events alone, says NOAA, stands at $52 billion and still rising — a heft... | <urn:uuid:7a818916-4f3d-4784-8fb3-feb22d5ee523> | 2.96875 | 1,609 | Content Listing | Science & Tech. | 52.666705 |
AS THE US Congress contemplates digging up oil reserves in the Arctic National Wildlife Refuge (ANWR) in Alaska, a study claims that one of the least developed renewable energy technologies, photovoltaic solar cells, is likely to contribute between 8 and 15 times as much electrical energy as the oil from the Arctic res... | <urn:uuid:106788a4-3f36-4659-981a-e86adb6485a6> | 3.109375 | 144 | Truncated | Science & Tech. | 35.189475 |
Old Earth German mathematician (298-339 BT; 1671-1630 AD) who first postulated that the planets revolve around the sun in elliptical orbits, rather than (as had previously been believed) spherical ones.
Old Earth German mathematician who first postulated that the planets revolve around the sun in elliptical orbits, rat... | <urn:uuid:db857510-fce9-4d43-ad55-1a35d3312a1f> | 3.5625 | 388 | Knowledge Article | Science & Tech. | 38.080699 |
What is OLE Automation?
OLE (Object Linking and Embedding) Automation allows applications to communicate, exchange data, and control one another. It allows a client application to create and control an object, using the exposed object's interface. An Automation object is an object that is exposed to other applications ... | <urn:uuid:ab929344-539c-4ec9-9721-5cb7551e9656> | 3 | 541 | Knowledge Article | Software Dev. | 24.905771 |
This image shows the grooved terrain of Ganymede.
Click on image for full size
Grooves of Ganymede
Instead of icy-volcanism, the surface of Ganymede reveals a gradual surface stretching which is similar to the crustal stretching of the Earth. In this case, the folding and stretching of the crust of Ganymede resulted in... | <urn:uuid:a70c6a23-cc2f-466e-b8ed-2cb38e6c819f> | 4.34375 | 566 | Content Listing | Science & Tech. | 58.828937 |
Science Fair Project Encyclopedia
The Sweetbay magnolia, Magnolia virginiana, also called just Sweetbay, is a member of the magnolia family, Magnoliaceae. It was the first magnolia to be scientifically described, and is the type species of the genus Magnolia; as Magnolia is also the type genus of all flowering plants, ... | <urn:uuid:013ac657-c3f2-4983-a5b9-fde5a78cb724> | 3.46875 | 308 | Knowledge Article | Science & Tech. | 49.858254 |
The main science objective of the Mars Science Laboratory (MSL) is to explore and quantitatively assess the habitability and environmental history of a local region on the martian surface. This mission will use a variety of instruments carried on a rover platform that are designed to assess the biological potential, ch... | <urn:uuid:88a2157b-890b-437a-8670-7835cd1fa885> | 3.015625 | 3,141 | Knowledge Article | Science & Tech. | 46.361656 |
RNA is known to act as an enzyme via its ability to fold itself in specific ways.
Is DNA capable of such structures? Or is it some biochemical reason stopping the folding? Have they been observed in nature?
There are no known natural DNA enzymes (deoxyribozymes), but there are various synthetic DNA enzymes. The first d... | <urn:uuid:56957c54-eee7-4cc1-ac39-43350f0c9054> | 3.84375 | 322 | Q&A Forum | Science & Tech. | 29.815731 |
This is the coldest time of year in the Prairies. Below -20 °C it all feels about the same, but the fuel lines in cars freeze more easily, and outdoor sports are no longer safe. We all become grouchy creatures of the indoors for a few months each year. But as much as I hate the extreme cold, I would rather be here than... | <urn:uuid:3ddd98ec-ff32-48e6-8da7-5b96e6d41207> | 2.796875 | 338 | Personal Blog | Science & Tech. | 59.556597 |
The atexit module defines functions to register and unregister cleanup functions. Functions thus registered are automatically executed upon normal interpreter termination. atexit runs these functions in the reverse order in which they were registered; if you register A, B, and C, at interpreter termination time they wi... | <urn:uuid:9d22fed8-04a3-41e3-bdba-ccbc448a7c97> | 2.765625 | 618 | Documentation | Software Dev. | 35.874976 |
Sea lilies AINSLEY DREW · MAR 30 2009
Crinoids, or sea lilies, are marine animals that resemble plants. Unlike its garden namesake, the sea lily doesn't stay still, but creeps along to avoid becoming prey for sea urchins and other predators.
It seems they've also developed the ability to "shed" their stalk-like appenda... | <urn:uuid:2417e435-5565-4a46-99d1-17c6b7620d28> | 2.984375 | 193 | Knowledge Article | Science & Tech. | 60.391811 |
|Physics of Propulsion
To better understand specific propulsion
technologies, it is important to have a basic foundation of physics
concept and terms. This helps in understanding how movement
can be produced in space.
Nearly all propulsion technologies that
scientists have developed so far rely on Newton's third law, w... | <urn:uuid:3787a6a5-99bf-4b76-9b56-a68fdb412ac7> | 4.25 | 2,732 | Knowledge Article | Science & Tech. | 61.549741 |
The breakout page for the Science menu tab.
Mapping the Early History of the Moon
In 41st annual Killian Lecture, Maria Zuber describes looking deep into the moon’s interior to chart its early history.
Find all of the CAN-2 related materials here.
The Moon's magnetic field is 100 to 1000 times weaker than the Earth's. | <urn:uuid:aa28a669-25b9-452f-816b-b364164a7685> | 3.53125 | 76 | Content Listing | Science & Tech. | 71.416292 |
Your Planet Shouldn't Exist
This terrarium is at the new California Academy of Sciences in San Francisco. By ascending a series of passageways one passes through all levels of a rainforest, from underwater to above the treetops. Hopefully we will build such domes on the Moon someday.
San Francisco State University is o... | <urn:uuid:860ecda1-e768-4d37-9bcd-b7be0b9d5f0d> | 3.546875 | 608 | Personal Blog | Science & Tech. | 51.335772 |
Electricity is a type of energy used everywhere in society.
A plug's components (live, neutral, earth wire; fuse) and how to wire it. Double insulation and circuit breakers. The volt equation: power current and voltage and how this could be used to calculate electricity bills. See Mains Electricity.
Types of energy (th... | <urn:uuid:1c8c6e4b-7152-4983-a760-ac962cdf76d9> | 3.8125 | 339 | Knowledge Article | Science & Tech. | 22.457143 |
“There is a single light of science, and to brighten it anywhere is to brighten it everywhere.” -Isaac Asimov
One of the most spectacular and successful ideas of the 20th Century was Einstein’s General Relativity, or the idea that matter and energy determines the curvature of spacetime, and the curvature of spacetime i... | <urn:uuid:e2ada289-fe1c-4f95-aafb-3b5fa51a05e8> | 4 | 2,071 | Personal Blog | Science & Tech. | 34.625536 |
In the Dark
A mysterious force is tearing the universe apart!
- By Ed Regis
- Air & Space magazine, March 2005
(Page 5 of 6)
It’s an open question where the universe is headed, but the three alternatives are biggies: the Big Lonely, the Big Crunch, and the Big Rip. If the repulsive force of dark energy remains constant... | <urn:uuid:e7054e3b-0c8c-4d0b-a403-908af8e2dc69> | 2.859375 | 1,102 | Nonfiction Writing | Science & Tech. | 40.99205 |
FISHES OF THE CONNECTICUT RIVER
The fishes of the Connecticut River include members of three evolutionary lines
The jawless fish (Cyclostomata); the sea lamprey eel belongs to this ancient group.
The cartilage fish (Chondrichthyes); the dogfish shark occasionally visits the mouth of the
The bony or ray-finned fish (Ost... | <urn:uuid:c4628e6f-25e0-42f3-a8ae-004dd63045db> | 3.5 | 401 | Knowledge Article | Science & Tech. | 41.023299 |
"How Fast Does a Charge Decay?" the neutralization of
charges by conduction through the bulk or along the surface
of a material was discussed.1 Although bulk
and surface conduction are important processes in static
neutralization, in many situations, the materials involved
cannot be made sufficiently conductive in an a... | <urn:uuid:277c5bdf-816e-4e2b-ac1e-50f9d2aee1b4> | 3.84375 | 1,969 | Academic Writing | Science & Tech. | 45.444079 |
Liquefaction of Partially Saturated Sands
Liquefaction-induced damages to our built environment can be catastrophic. During the past four decades, intensive efforts have been made to understand the mechanism of liquefaction, and to develop procedures for analyzing the liquefaction potential at a site during a given sei... | <urn:uuid:a79b41e5-7597-4770-b10d-bcbd79685269> | 2.84375 | 1,368 | Academic Writing | Science & Tech. | 28.226507 |
Using an index to access your data quickly is a well-known strategy for optimizing data access performance; probably the most well known when it comes to databases. An index makes the trade-offs of increased storage overhead and slower writes (since you must both write the data and update the index) for the benefit of ... | <urn:uuid:d559bdbb-eb7b-4072-96e1-4159de943540> | 3.625 | 2,966 | Personal Blog | Software Dev. | 39.89301 |
Where does all the water go at low tide?
Into Space! Well – kind of. The Earth and its seas are egg-shaped, and water doesn’t cover the Earth evenly. High tides happen as we spin through the deep bits. Low tides happen as we spin through the shallows.
What? The Earth is an egg?! I thought it was a ball...
Nope. It’s al... | <urn:uuid:45e37375-daf4-4674-9f28-80c504a44f80> | 3.59375 | 936 | Knowledge Article | Science & Tech. | 82.745227 |
Sometimes we see sections of planes oblique to their strike. In cases like these, the slope of the plane is not its true dip but shallower. In the case of a section parallel to the strike, the plane can appear horizontal. The dip of a plane as seen in an oblique section is called its apparent dip. We might want to know... | <urn:uuid:d3b5ba75-ed88-4c59-bd93-c9e8e021f389> | 4.0625 | 271 | Tutorial | Science & Tech. | 64.932562 |
This is a photograph of altostratus clouds.
Click on image for full size
Courtesy of Keith G. Diem. Used by permission.
Altostratus belong to the
Middle Cloud group (2000-7000m up). An altostratus cloud usually covers the whole sky and has a
gray or blue-gray appearance. The sun or moon may shine through an altostratus... | <urn:uuid:3ed24820-78db-49d5-8d8d-92482219b018> | 3.53125 | 562 | Knowledge Article | Science & Tech. | 63.039015 |
But it's a little more complex than this. We also have quantum mechanics to contend with. The spin of an electron is a vector. But we find that when we measure one of the components of this vector this value is quantised and can only take values +hbar/2 and -hbar/2, where hbar is Planck's constant. We choose units wher... | <urn:uuid:3c5a76b8-b3b0-42f9-9ed3-a7e4cf73043b> | 4.09375 | 1,475 | Personal Blog | Science & Tech. | 61.186839 |
Apparently there is physics involved in a bump in a rug. The scientists have used their studies of bumps in a rug to apply it to other more important things. It can be used to explain how certain defects in a crystal move, the way tectonic plates move, how cell membranes slide, and how inchworms crawl. To read the full... | <urn:uuid:01c23521-ec05-48c9-be51-29ed94888993> | 2.765625 | 116 | Truncated | Science & Tech. | 71.357 |
Introduction to Lua Programming
Forum: Programming and Scripting
Topic: Introduction to Lua Programming
started by: dougz
Posted by dougz on Sep. 07 2007,14:22
Thought this might be of interest --
|What is Lua?|
Lua is a powerful, light-weight programming language designed for extending applications. Lua is also freque... | <urn:uuid:bf92b12e-eede-4219-90a7-bb8ab0f8fce0> | 3.078125 | 278 | Comment Section | Software Dev. | 34.285923 |
Bend, Stretch and Break - Materials Testing at Northwestern
Mark Seniw has watched students bend, stretch and break a number of materials since he began overseeing Northwestern University’s Central Laboratory for Materials Mechanical Properties (CLaMMP) in 1984.
The materials fatigue they study involves the kind of pro... | <urn:uuid:970106e6-9ef6-413f-86cd-da698dcdc2ff> | 3.234375 | 1,169 | Audio Transcript | Science & Tech. | 53.118816 |
The US drought got progressively worse in the past week over most of the middle of the US. For the remainder of the country, some places witnessed worsening drought conditions while other areas saw some small amount of relief.
According to the US Drought Monitor’s weekly update, “The August 7 Drought Monitor map shows ... | <urn:uuid:81aac226-505d-41bd-ae6c-50b2aff2a604> | 3.09375 | 435 | Personal Blog | Science & Tech. | 56.443016 |
Solar flares zap a science satellite. A coronal mass ejection sparks a stunning display of aurora borealis. Blazing meteors streak through Earth's atmosphere. All these are examples of space weather.
Space weather is a relatively new field of science dedicated to the understanding of interactions between the sun and Ea... | <urn:uuid:6789fd6c-af77-43d8-aa64-d9a218251139> | 3.515625 | 181 | Knowledge Article | Science & Tech. | 42.290417 |
Roland Piquepaille writes "NASA is testing a shape-shifting robot called "TETwalker" for tetrahedral walker, because it looks like a flexible pyramid. It has been tested in the lab and at the McMurdo station in Antarctica to test it under conditions more like those on Mars. Now, it is on the way to be — really — miniat... | <urn:uuid:c3447322-97df-41c0-90ce-b94d1e52e283> | 2.71875 | 184 | Truncated | Science & Tech. | 36.636977 |
Data From NASA's MISR Instrument
Data from NASA's MISR instrument on NASA's Terra spacecraft show that global average cloud height declined by about 1 percent over the decade from 2000 to 2010, or around 100 to 130 feet (30 to 40 meters). The graph here shows anomalies in global effective cloud-top height from the 10-y... | <urn:uuid:742c1029-728a-4a12-a3d3-ec4d4cc9b63e> | 2.96875 | 143 | Knowledge Article | Science & Tech. | 39.238263 |
"Nuclear winter" - the phrase sounds like a relic from the cold war, but the threat is far from over.
Even as the US and Russia have destroyed thousands of warheads in the name of disarmament, India, Pakistan and North Korea have swelled their stockpiles. A regional nuclear conflict would lower global temperatures for ... | <urn:uuid:f2d86d6d-4bf9-47d3-b370-c929c3e5e03a> | 3.3125 | 214 | Truncated | Science & Tech. | 47.582679 |
Help Me Understand Mechanical Advantage Please
View Single Post
Jan31-12, 05:28 AM
I said that i already know that having a longer lever on the force side of the folcrum requires less force. what i'm asking is WHY WHY WHY does it make it easier? why is a longer lever so special if still moving the same object!?Is this ... | <urn:uuid:86e043f7-0d97-4325-980f-5ca539d4d7cf> | 3.03125 | 99 | Comment Section | Science & Tech. | 67.739286 |
|www . Science-Projects . com|
Astronomy Projects for Beginners
INTRODUCTION. Of all the scientific studies, astronomy can be the one that is so immediately filled with wonder. It is so enticing! While so many students would like to do projects in astronomy, alas, the vast majority of projects are not easy to do becaus... | <urn:uuid:b80472da-3471-47b3-b3be-2e7776b5477f> | 3.515625 | 623 | Tutorial | Science & Tech. | 61.171089 |
Lint was a program which literally exmined K&R C SourceCode for "lint" -- bits of fluff in the code. Lint was necessary because prior to ANSI C, the language was much looser about what it accepted, arguments and variables could have implicit types and there were a range of other conveniences. Lint performed SourceCode ... | <urn:uuid:546962d3-9926-4e2d-8bda-4daead28aa51> | 3.5 | 132 | Knowledge Article | Software Dev. | 57.808065 |
Scientific name: Callophrys rubi
The only green-coloured butterfly in the UK, although the metallic green colouring is only on the undersides of the wings.
The Green Hairstreak holds its wings closed, except in flight, showing only the green underside with its faint white streak. The extent of this white marking is ver... | <urn:uuid:5d9e9047-0e22-41b8-8c84-2ec147437c77> | 3.328125 | 475 | Knowledge Article | Science & Tech. | 25.280047 |
Engineers operating the Mars rover Curiosity will put its robotic arm through a set of movements to allow them to tailor its motions to less gravity than it experienced on Earth. Then it's off to explore.
In its first month on Mars, NASA's rover Curiosity has traveled a grand total of 357 feet, briefly flexed its robot... | <urn:uuid:c57d9263-47d6-46da-8304-8e7f601c8098> | 4.0625 | 465 | Truncated | Science & Tech. | 50.797727 |
I have the following problem:
In my class, we did a majorly complicated method to figure this out but I think there is a better way to do this... Here is the exact problem:
A belt fits snugly around the two circular pulleys shown.
Find the distance between the centers of the pulleys. Round to the nearest hundredth.
The... | <urn:uuid:93cf3cde-ddd0-4935-83b4-6e1c4bb05cfc> | 2.75 | 179 | Q&A Forum | Science & Tech. | 69.318604 |
Path Markup Syntax
Paths are discussed in Shapes and Basic Drawing in WPF Overview and the Geometry Overview, however, this topic describes in detail the powerful and complex mini-language you can use to specify path geometries more compactly using Extensible Application Markup Language (XAML).
This topic contains the ... | <urn:uuid:58d78973-f77b-4904-a07f-3159ba245086> | 3.359375 | 1,526 | Documentation | Software Dev. | 50.281348 |
A common problem we all have to deal with is fixing memory leaks. In garbage collecting languages like Java we typically expect not to ever need to worry about memory management. However the limitations of how a garbage collector works means that we can still create leaks. Which defeats the advantage of a garbage colle... | <urn:uuid:a603eda4-c69e-44a0-bc3d-ec2e74b03c2f> | 3.125 | 128 | Truncated | Software Dev. | 49.527853 |
Oct. 20, 2006
Mark your calendar: On Wednesday, Nov 8th, the planet Mercury will pass directly in front the Sun.
July 28, 2006
At the dawn on the Space Age, the first spaceship to reach The Mooncrashed. Forty-seven years later, NASA plans to do it again.
Feb. 8, 2006
If winter Olympic Games were held on the moon, where... | <urn:uuid:a248d47a-3a61-487b-9fc5-b9ed3021502e> | 3.171875 | 318 | Content Listing | Science & Tech. | 69.919773 |
Stars are the most important objects in the Universe. Even though they make up less than 3% of the matter they make up 100% of the visible matter. They are a major apparatus for studying the universe and its evolution. This includes the remnants left from their deaths and the discarded material from stellar winds durin... | <urn:uuid:f62f4f0d-df1c-4963-a58d-4e72ac5aaa41> | 3.984375 | 610 | Knowledge Article | Science & Tech. | 37.991455 |
Watch: "Brain Tricks - This is How Your Brain Works"
How exactly does the brain work? It's a complex question with no clear answer. Despite the fact that the brain comprises how we see and process the world, humans have a hard time processing the brain itself. But the bright minds at AsapSCIENCE have taken a stab at it... | <urn:uuid:c230890b-4356-4052-8747-8ee44dfa6eaf> | 3.1875 | 308 | Truncated | Science & Tech. | 62.156522 |
In this chapter we will discuss the details of the client/server communication in MySQL. The goal is to give you the ability to look at a binary dump of the client/server communication and be able to understand what happened. This chapter can also be helpful if you are trying to write a MySQL proxy server, a security a... | <urn:uuid:b8383629-6d87-4372-b806-03067f43918e> | 3.4375 | 795 | Documentation | Software Dev. | 53.638696 |
while creating new elements of the sequence, the distribution is always "uniform"
According to that code they are randomly distributed within a cell, not uniformly distributed inside of it.
They need to be uniformly distributed with respect to other objects in the same cell as well as to those in neighboring cells.
BUE... | <urn:uuid:d36ba3aa-8a16-4cb8-879c-e1ca00b5b68a> | 2.78125 | 314 | Comment Section | Software Dev. | 55.638636 |
NASA Chat: The Sun Has a 'Cirtain' Flare
The sun is the largest and most important object in our solar system -- a huge glowing ball that provides, light, heat and energy to our Earth. However, our beneficial space neighbor is also capable of some stellar temper tantrums. How often do these "tantrums" occur, and what o... | <urn:uuid:3c2d942c-6efe-437d-97d5-436bb36906fc> | 3.171875 | 196 | Audio Transcript | Science & Tech. | 54.082828 |
In celebration of the Hubble Space Telescope’s 22nd anniversary the ESA has released this truly stunning image of the star forming region 30 Doradus.
30 Doradus is better known as the Tarantula nebula and is located 170,000 light years away within the Milky Way’s largest satellite galaxy the Large Magellanic Cloud (LMC... | <urn:uuid:0c78d110-cde6-4c60-8e45-230ce8140386> | 3.46875 | 2,045 | Content Listing | Science & Tech. | 48.852529 |
|Molar mass||316.755 g/mol|
|Appearance||White monoclinic powder|
|Density||3.71 g/cm³, solid|
165 °C (decomp.)
|Solubility in water||0.069 g/100 mL|
|Solubility in other solvents||Soluble in dilute hydrochloric acid, KCN, ammonia
slightly soluble in alcohol, ether
|LD50||46 mg/kg (rat, oral)|
| (what is: / ?)
Except w... | <urn:uuid:99134b6a-9071-4e74-9155-0431a674b1cb> | 2.828125 | 1,496 | Knowledge Article | Science & Tech. | 54.932593 |
Importance, threats and conservation status
Wetlands International, 2002
ISBN 90 5882 009 2
4. Shorebirds occuring in internationally important numbers at Yellow Sea sites (continued)
4.4 Species accounts (continued)
Subspecies None; entire global population confined to the EAAF.
Breeding: Myanmar, Thailand, Vietnam to... | <urn:uuid:d003f34b-8da2-4c04-89be-8effd3d6da8f> | 3.484375 | 386 | Knowledge Article | Science & Tech. | 50.322115 |
Hi Arenzano, I don't know what level of detail you're looking for, but what you can do is look up articles about histolysis (that's the digestive-like process where the pupa breaks down parts of the old larva body for re-use), histoblasts (also called the imaginal buds or discs, which are groups of cells that are prese... | <urn:uuid:17adfdde-4c06-4e40-b4d6-596e651abf2f> | 3.078125 | 313 | Comment Section | Science & Tech. | 30.149 |
A nucleic acid is a macromolecule composed of chains of monomeric nucleotides. In biochemistry these molecules carry genetic information or form structures within cells. The most common nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). Nucleic acids are universal in living things, as they are fo... | <urn:uuid:91d91ec9-7e02-4bef-abfb-06c281610eed> | 4 | 1,857 | Knowledge Article | Science & Tech. | 23.853932 |
The boulder forming the substrate for these lichens was part of the Hope Slide forty years ago. Unless this rock was previously exposed as part of mountainside (which I doubt), forty years of lichen colonization and growth have led to this mosaic containing six species or more.
As pioneers, these crustose lichens play ... | <urn:uuid:13236b9d-ec4e-4b17-82fd-6952b5ecf564> | 3.890625 | 252 | Knowledge Article | Science & Tech. | 48.367455 |
News You Can’t Use About Arctic Ice Climate Change
Every month the National Snow and Ice Data Center (NSIDC) issues a report on how much of the Arctic Ocean and surrounding waterways are covered in ice, and whenever that happens — most notably in summer, when the ice melts back to reveal open water — people like me fee... | <urn:uuid:42e02fbd-8b69-4daa-89fc-d81ac593294d> | 3.109375 | 936 | Personal Blog | Science & Tech. | 47.973511 |
Web edition: April 6, 2010
Print edition: April 24, 2010; Vol.177 #9 (p. 15)
Editor’s Note: Additional material was added to this story at 5 p.m. on April 6, 2010.
Physicists have reported synthesizing element 117, the latest achievement in their quest to create “superheavy” elements in the laboratory. A paper describi... | <urn:uuid:49044163-e543-4a9e-9ff1-3ee8a1a76f67> | 2.828125 | 740 | Truncated | Science & Tech. | 48.036977 |
At a recent math conference, Rouslan Krechetnikov watched his colleagues gingerly carry cups of coffee. Why, he wondered, did the coffee sometimes spill and sometimes not? A research project was born.
Although the problem of why coffee spills might seem trivial, it actually brings together a variety of fundamental scie... | <urn:uuid:134e252c-3ade-4789-bd8a-388e87845daa> | 3.125 | 440 | Knowledge Article | Science & Tech. | 21.262791 |
Does the weather have a memory?
by Philip Eden
There has always been an impression that certain types of weather recur at certain times of the year – indeed, the idea is enshrined in ancient country lore which contains myriad sayings and proverbs which tie climatic characteristics to the calendar.
But most thinking peo... | <urn:uuid:65dd91f9-bea9-43ec-aed7-a2f6dc97ce62> | 2.984375 | 395 | Nonfiction Writing | Science & Tech. | 42.953783 |
Significance Of Web Forms In Web Design
During the design phase of any website, there will a major goal looming in the mind of every web designer-The success of his website and the online business. Websites will be designed by applying all the core design principles, keeping in mind the type of audience that the busine... | <urn:uuid:a1494b93-e342-4f6e-a2fe-ae6805c205aa> | 2.875 | 803 | Knowledge Article | Software Dev. | 47.148189 |
Survey of Energy Resources 2007
Geothermal energy, in the broadest sense, is the natural heat of the Earth. Immense amounts of thermal energy are generated and stored in the Earth's core, mantle and crust. At the base of the continental crust, temperatures are believed to range from 200 to 1 000°C, and at the centre of... | <urn:uuid:b6da8bd0-6b32-4aab-add9-980223f49da2> | 4.28125 | 1,223 | Knowledge Article | Science & Tech. | 35.635848 |
A phase diagram is a graph showing the limiting conditions for solid, liquid, and gaseous phases of a single substance or of a mixture of substances while undergoing changes in pressure and temperature or in some other combination of variables, such as solubility and temperature. The figure shown below displays a typic... | <urn:uuid:a61677a2-e9fd-4251-8c5d-e863ccd1612c> | 4.0625 | 421 | Knowledge Article | Science & Tech. | 20.190942 |
|Don't Be Too Flaky|
|Summary: The density of water, ice, and snow aren't the same even though all three are composed of H2O. In this experiment we'll measure the relative densities of these three substances. After you're done you can submit your results to us and they will appear here on our web site along with data c... | <urn:uuid:30451199-ff99-46d8-9c10-b576ec758f3a> | 4.1875 | 722 | Knowledge Article | Science & Tech. | 67.934642 |
REST (Representational State Transfer) refers to an architectural model for the design of web services. It was defined by Roy Fielding in his dissertation on Architectural Styles and the Design of Network-based Software Architectures. The REST architecture is based on the following simple ideas:
- REST uses URIs to ref... | <urn:uuid:664ea3a8-7e8c-49d8-9659-5c3dea6e4765> | 3.453125 | 448 | Documentation | Software Dev. | 38.841646 |
Only lithosphere has the strength and the brittle behavior to fracture in an earthquake.
The map below locates earthquakes around the globe. They are not evenly
distributed; the boundaries between the plates grind against each other,
producing most earthquakes. So the lines of earthquakes help define the
(from the USGS... | <urn:uuid:2e6449ad-578d-40fb-b14e-ba0410808a01> | 4.3125 | 1,185 | Academic Writing | Science & Tech. | 40.126449 |
Very low flows in the Apalachicola River, defined as flows less than 6,000 cubic feet per second (ft3/s) at Chattahoochee, Florida, occurred in 15 of the 74 years of record from 1922 to 1995. At a river flow of 5,000 ft3/s, an estimated 260 acres of floodplain streams and lakes is connected to the main river channel. M... | <urn:uuid:09d0fedc-1556-402b-937c-545103213598> | 3.625 | 1,069 | Knowledge Article | Science & Tech. | 45.870286 |
A fence 5 feet tall runs parallel to a tall building at a distance of 4 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?
The smaller triangle has a base of x and a height of 5
The larger triangle has a base of 4+x and and unkno... | <urn:uuid:d62d1f41-482b-4e79-ac8e-80351cb8e5b3> | 2.96875 | 190 | Q&A Forum | Science & Tech. | 76.1375 |
2009 Measurements of Atmospheric Mercury Species in Atlantic Canada at Kejimkujik National Park (NS01)
John Dalziel*, Robert Tordon and Stephen Beauchamp
Air Quality Science Division
Meteorological Service of Canada
45 Alderney Drive
Dartmouth, N.S. B2Y 2N6
Environment Canada has recently began measuring the concentrat... | <urn:uuid:1cdda901-aaa2-42c8-b8f8-50aaadb93c14> | 3.03125 | 388 | Academic Writing | Science & Tech. | 21.041912 |
The total area enclosed by the small circles is what fraction of the area enclosed by the larger circle?
Suppose AB, the diameter of the large circle, is 30. Then the diameter of each small circle (e.g., AC) is 10.
The area of the small circles totals 7 · (5)2 = 175.
The area of the large circle is (15)2 = 225. | <urn:uuid:6e43ec3e-3d56-4361-b517-b230c626adca> | 3.421875 | 84 | Q&A Forum | Science & Tech. | 91.412742 |
Customizing the document processor
The document processor is driven by two tables. The first table,
paragraph_types, is a sequence of callable objects or method
names for coloring paragraphs. If a table entry is a string, then it
is the name of a method of the document processor to be used. For
each input paragraph, th... | <urn:uuid:2a958405-dbc1-4712-87e8-6e6494103ae0> | 3.015625 | 1,004 | Documentation | Software Dev. | 40.592142 |
The unique properties of water, due to its molecular structure and hydrogen-bonding capacity, are important to climate science. Water exists in all three phases at the temperatures on the surface and in the atmosphere on Earth. Ice floats on liquid water, so only ocean and lake surface waters freeze, not the bulk of th... | <urn:uuid:b7ad38ec-660d-4057-824b-ba15b1e259df> | 4.34375 | 1,266 | Knowledge Article | Science & Tech. | 31.071648 |
For years I have wondered why gyms use artificial resistance in their workout machines instead of hooking up electrical generators to them and having the electric bill paid by the workouts. Well, They are trying it out in Oregon, and the results are intriguing, as are the answers to my question. The concept has problem... | <urn:uuid:2e008bcd-3c67-4cbd-92ba-41be4c72eccc> | 3.15625 | 330 | Personal Blog | Science & Tech. | 46.477345 |
GPS? The emitter and detector are underground, so I wonder how they got an accurate GPS measurement. If they just have a GPS receiver aboveground, how do they know that that accurately corresponds to the location of the OPERA equipment? Are there survey markers on the land covering CERN?
Anyway, to double-check their r... | <urn:uuid:ad05ec43-bb8c-4911-8829-5a3b9b0af9cd> | 2.75 | 150 | Comment Section | Science & Tech. | 49.899919 |
Earthquake generated Tsunamison May 14, 2010 at 4:32 am
Tsunamis can be generated when the sea floor hurriedly deforms and vertically displaces the overlying water. Tectonic earthquakes are a certain kind of earthquake that are associated with the earth’s crustal deformation; when these earthquakes occur beneath the se... | <urn:uuid:4eef4b4f-94de-4de4-addb-6dd6a5f39869> | 3.828125 | 198 | Knowledge Article | Science & Tech. | 29.146689 |
LETTERS TO THE EDITORS
To the Editors:
In response to the article about Huygens's resonant clock pendulums (Science Observer, July–August), I'd like to note that this phenomenon has been known for at least 1,000 years in pipe organs. If two or more pipes are tuned to slightly different frequencies—say a semitone apart ... | <urn:uuid:bac2fce2-c5ea-4249-b9a2-9d8588281d3c> | 3.109375 | 229 | Comment Section | Science & Tech. | 25.677524 |