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It’s fun to dress up and pretend you’re someone else, at least for a little while. But in the bug world looking different isn’t just for fun, it’s a way of life. Being in disguise helps insects hunt for food and stay safe. Some grasshoppers, spiders and caterpillars have a unique way of keeping “undercover.”
It’s a Sti... | <urn:uuid:1b9e1060-6419-46a2-9153-3cec99a029f5> | 2.75 | 669 | Personal Blog | Science & Tech. | 67.123439 |
Fact sheet number: FS-2002-2002-84-MSFC
Missions: Expedition 6, ISS Mission 11A, STS-113 Space Shuttle Flight, return flight ULF1, STS-114
Experiment Location on ISS: U.S. Lab EXPRESS Rack No. 4
Principal Investigator: Dr. Daniel C. Carter, New Century Pharmaceuticals, Inc. Huntsville, Ala.
Project Manager: Clark Darty... | <urn:uuid:2810380e-e02d-4a64-9bb4-66a938c99ac8> | 2.71875 | 992 | Knowledge Article | Science & Tech. | 24.354579 |
|Version 19 (modified by zerny, 5 years ago)|
Welcome to the OpenEngine project
OpenEngine is a cross platform framework for creating 3D applications. It is a free software initiative started, at the Department of Computer Science at the University of Aarhus, in order to create a game engine geared towards educational ... | <urn:uuid:4444fd6d-f7c0-4ecd-ad8b-4be72365dc27> | 2.6875 | 123 | Content Listing | Software Dev. | 22.952273 |
Laser technology has recently evolved to the point where tunable uv radiation can be obtained using commercially available lasers. The uv output between 217–260 nm is generated indirectly by using nonlinear optical devices such as frequency doubling and mixing crystals and/or by utilizing anti-Stokes Raman shifting tec... | <urn:uuid:5fa3dbb7-2cdc-42c0-ac55-c71631463053> | 2.765625 | 140 | Academic Writing | Science & Tech. | 29.448019 |
Nuclear Power Can and should be the Solution for both Global Warming and Nuclear Waste
OK, I’ll say it even though it may be wildly unpopular in the wake of the nuclear disaster in Fukushima, Japan. We still need a nuclear renaissance in the U.S.A. I’ve been studying nuclear energy and there just might be a design that... | <urn:uuid:475c2961-a22b-403e-adbc-0275eadebdcf> | 2.84375 | 1,333 | Personal Blog | Science & Tech. | 50.670508 |
- How many planets do you think there are beyond the solar system we live in?
- How do you think scientists are able to detect these planets beyond our solar system?
- What is an exoplanet?
- When was the first exoplanet discovered, and how far away is it?
- How many exoplanets have scientists confirmed?
- How many pos... | <urn:uuid:12ba2379-2d63-4e67-b569-5d0712daa4ef> | 3.6875 | 372 | Q&A Forum | Science & Tech. | 52.993 |
Acronym for the Common Gateway Interface
A standard that defines the conditions a CGI program should be able to expect.
A CGI program is run by a WebServer to process certain requests. It is expected to return output to be sent back as the server's response to that request. That output will often be a WebPage, but migh... | <urn:uuid:62d98fe2-ba30-4f38-a785-7a0b0247eb26> | 2.953125 | 156 | Documentation | Software Dev. | 43.974034 |
45In meteorology, three different temperature scales are used: Fahrenheit, Celsius, and Kelvin.
German-born scientist Gabriel Daniel Fahrenheit developed the Fahrenheit Scale. He introduced his scale and new mercury thermometer in 1714 in Holland. Zero Fahrenheit was the coldest temperature Fahrenheit could create with... | <urn:uuid:c440db07-89fa-42b2-ac5d-aa3cc8459b08> | 4.25 | 278 | Knowledge Article | Science & Tech. | 56.550036 |
One of these things is not like the other: Astronomers have spotted a dwarf galaxy that spans just 3,000 light years across (as opposed to our Milky Way’s diameter of 100,000 light years), but hosts an outsize supermassive black hole for its puny size.
Some smaller galaxies have supermassive black holes as well, but in... | <urn:uuid:779994d6-5c8f-49e4-bf81-ff2a4ad79837> | 3.484375 | 432 | Personal Blog | Science & Tech. | 52.454537 |
David Honig is a graduate student in marine science at Duke University in the lab of Dr. Cindy Van Dover. He is participating in LARISSA, a 2 month multinational expedition to study the causes and consequences of the ice shelf collapse. He will be posting regular updates on the expedition exclusively for Deep Sea News ... | <urn:uuid:6b65adc3-cbca-43c2-b1dd-a1246148e19f> | 2.78125 | 423 | Personal Blog | Science & Tech. | 42.569602 |
Topological quantum computer
A topological quantum computer is a theoretical quantum computer that employs two-dimensional quasiparticles called anyons, whose world lines cross over one another to form braids in a three-dimensional spacetime (i.e., one temporal plus two spatial dimensions). These braids form the logic ... | <urn:uuid:ddc7fca8-309f-4082-9e13-4c0ad0010cf6> | 3.671875 | 1,330 | Knowledge Article | Science & Tech. | 29.540934 |
A ball whooshes down a slide and hits another ball which flies off
the slide horizontally as a projectile. How far does it go?
How high will a ball taking a million seconds to fall travel?
A weekly challenge: these are shorter problems aimed at Post-16 students or enthusiastic younger students.
Suppose we have a pool t... | <urn:uuid:ae2c602e-9a25-4feb-a0df-e6106d4b3f76> | 2.890625 | 189 | Tutorial | Science & Tech. | 78.013616 |
But who killed the Medieval Warm Period?
Before we begin the investigation into the usual suspects, some background for people who those who don’t follow climate science closely, which certainly includes most of the disinformers and apparently at least two statisticians.
- There is a high probability that the recent wa... | <urn:uuid:3e1d97c6-b7d4-40d7-8c12-0d5712ba08c2> | 2.953125 | 577 | Personal Blog | Science & Tech. | 32.143074 |
Letter to the Editor
Effects of dust on light-curves of ϵ Aurigae-type stars
Astronomical Institute, Slovak Academy of Sciences, 05960 Tatranska Lomnica, Slovak Republic
Received: 23 May 2011
Accepted: 15 July 2011
Context.ϵ Auriga is one of the most mysterious objects in the sky. Previous modeling of its light-curve a... | <urn:uuid:384e9aca-ca86-4b0b-8e26-d921ed9432dc> | 2.75 | 453 | Academic Writing | Science & Tech. | 42.312516 |
Citizen Science Goes to Sea
The Royal Navy was taught to be very thorough during World War I. At sea, despite battles and storms, they recorded the weather every four hours dutifully into logbooks. Good thing, too. Little did those sailors realize that 100 years later, those books would be digitized (huh?) and distribu... | <urn:uuid:aacfe9bf-936b-41d3-9842-dd0db05946cc> | 3.5 | 409 | Personal Blog | Science & Tech. | 54.271441 |
Poisson's equation is a partial differential equation named after the French mathematician and physicist Simeon-Denis Poisson. Derived from Coulomb's law and Gauss's law, it is a second-order partial differential equation used for solving problems, such as finding the electric potential for a given charge distribution,... | <urn:uuid:893bd934-3cac-4b31-8aa1-9dd27a7494c7> | 3.359375 | 100 | Knowledge Article | Science & Tech. | 29.481579 |
Another Test of the CLAW Hypothesis: What do the results suggest about the ability of oceanic phytoplankton to buffer earth's climate against greenhouse-gas-induced global warming?
Medieval Warm Period Record of the Week
This issue's Medieval Warm Period Record of the Week comes from the Western Slope of the Northern O... | <urn:uuid:03d56e2d-9746-4891-9c0f-e17e533b2763> | 3.046875 | 235 | Content Listing | Science & Tech. | 42.576429 |
An oxidizing agent is a chemical substance that takes electrons from other substances. Oxidizing agents, sometimes called oxidizers or oxidants, are missing electrons and take them from other things that have electrons. The oxidizing agent is reduced as it gains electrons. The substance the electrons are taken from is ... | <urn:uuid:4f358a94-f974-4973-9cb5-1ac966d80470> | 3.171875 | 73 | Knowledge Article | Science & Tech. | 25.658 |
How Does Lightning Form?
Lightning is an electrical current and occurs within thunderclouds, or cumulonimbus clouds. In these clouds, small pieces of ice collide into each other creating an electrical charge. After a while, the cloud fills up with electrical charges. Positive electrical charges form at the top of the c... | <urn:uuid:345eb0ff-58f8-4f3a-b128-d7529c193295> | 4.03125 | 355 | Knowledge Article | Science & Tech. | 59.38509 |
By OurAmazingPlanet Staff:
Some of Asia's most magnificent animals are at a crossroads and may not survive if steps aren't taken to save them, an environmental group announced today (Sept. 5) at the World Conservation Congress in Jeju, Korea.
The Wildlife Conservation Society released a list of animals in danger of ext... | <urn:uuid:2b9ba470-6ea0-4a93-a6d2-4e4d69a06c04> | 3.0625 | 1,514 | Truncated | Science & Tech. | 34.923511 |
Total renewable water resources: 0.03 cu km (1999)
Definition: This entry provides the long-term average water availability for a country in cubic kilometers of precipitation, recharged ground water, and surface inflows from surrounding countries. The values have been adjusted to account for overlap resulting from surf... | <urn:uuid:88ad0e61-8c8d-4f1f-bf9a-8de4972654b6> | 2.984375 | 174 | Knowledge Article | Science & Tech. | 24.384947 |
Synchrotron radiation was initially
sapping energy from circulating electron beams and upsetting
calculations. Fortunately physicists learned that the fan of
synchrotron radiation "waste" from high energy electron
rings could be used to probe the structure of a wide range
There are many views on how synchrotrons and sy... | <urn:uuid:6dd51c91-a384-4e06-97f8-c75864499b87> | 4 | 757 | Knowledge Article | Science & Tech. | 37.24572 |
By James Barrante
Scientists tend to throw words around that we sometimes mistakenly assume the layperson will understand. So it should not surprise us when laypeople or individuals from other areas of science misinterpret a word, or do not use it correctly. One such word is "entropy."
People generally associate the wo... | <urn:uuid:6598d806-d4d9-4b6d-9d26-9d120bc9fe7e> | 3.3125 | 827 | Nonfiction Writing | Science & Tech. | 53.624979 |
From Netherlands Organization for Scientific Research
DNA's oscillating double helix hinders electrical conduction DNA has an oscillating double-helix structure. This oscillating means that the DNA molecules conduct electricity much less well than was previously thought. Ultrafast cameras were one of the devices the re... | <urn:uuid:7e6bd000-cca1-42d2-8d50-4384a0da8911> | 3.609375 | 609 | Knowledge Article | Science & Tech. | 45.555616 |
Using the left mouse button, select piece and drag into position. Pressing the right mouse button rotates piece. If you need a hint, press the "V" key to view the whole image. Change the number of pieces: 9 | 24 | 48 | 160.
Tall objects such as trees and skyscrapers are commonly struck by lightning. Mountains also make... | <urn:uuid:cdd3e77a-74a8-4b6a-b376-abb1c8f3ad6b> | 2.796875 | 169 | Tutorial | Science & Tech. | 71.541961 |
>100 keV Electrons (90° detector)
The red box in the plot shows the location of the beginning of
the satellite track for this plot. The red triangle
indicates the location of the end of the track. Data gaps or missing
orbits appear as gaps in the satellite track around the earth.
Select another plot from the list. | <urn:uuid:46ede9f7-153f-4e6f-a59c-034050cd07d3> | 2.765625 | 74 | Structured Data | Science & Tech. | 69.181776 |
Permitted Context: %Body.Content
Content Model: %Body.Content
The DIV element is used with the CLASS attribute to represent
different kinds of containers, e.g. chapter, section, abstract, or
appendix. For example:
<P>TheChieftain product range is the white hot hope for the
coming year. This report sets out how to posit... | <urn:uuid:d3a95f20-e5fe-45eb-9f46-a45cfc31d2a0> | 3.234375 | 675 | Documentation | Software Dev. | 41.383765 |
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.
September 24, 1996
Explanation: If the thick clouds covering Venus were removed, how would the surface appear? Using an imaging radar technique, the... | <urn:uuid:96d8fee4-4956-405c-a0b7-693c49ee5df0> | 4.21875 | 227 | Knowledge Article | Science & Tech. | 34.100259 |
Capturing celestial crinoline
October 2012: Learn how to photograph one of the sky’s more colorful phenomena: atmospheric coronae.
August 28, 2012
|When thin clouds or tiny airborne particles wash over the Sun or Moon in the sky, a colorful phenomenon called the atmospheric corona may encircle these bodies like a crino... | <urn:uuid:6a2abc72-672c-4ed3-8dbc-2964f007378b> | 3.015625 | 339 | Truncated | Science & Tech. | 41.308283 |
Mira: "Wonderful" Star Reveals its Hot Nature
The Chandra image shows Mira A (right), a highly evolved red giant star, and Mira B (left), a white dwarf. To the right of the image is an artist's conception of the Mira star system. Mira A is losing gas rapidly from its upper atmosphere via a stellar wind. Mira B exerts a... | <urn:uuid:92213985-05b2-4249-821c-e30f5c694079> | 3.875 | 487 | Knowledge Article | Science & Tech. | 49.125035 |
Everyone has seen waves on water, heard sound waves and seen light waves. But, what exactly is a wave? Of course, the goal of this course is to answer this question for you. But for now you can think of a wave as a traveling or oscillatory disturbance in some continuous medium (air, water, the electromagnetic field, et... | <urn:uuid:0744ecf1-0f8f-4e6b-8c2e-49db34ae93a9> | 3.8125 | 151 | Truncated | Science & Tech. | 54.74241 |
The big issues
Causes of speciation
In the fruit fly example, some fruit fly larvae were washed up on an island, and speciation started
because populations were prevented from interbreeding by geographic isolation. Scientists think that geographic
isolation is a common way for the process of speciation to begin: rivers... | <urn:uuid:822a4a94-fdc3-4858-8b5a-7360ca8fd846> | 3.78125 | 308 | Academic Writing | Science & Tech. | 25.726073 |
Potential energy stored in the capacitor is U=1/2CV^2. Dielectric with d=4 will increase the capacitance by 4. Calculate the energy stored in the capacitor before and after the dielectric is inserted - the difference will be the work done to insert the dielectric.
The justification why ΔU is the work done in this case ... | <urn:uuid:905536bf-6bf4-4390-88c3-36a2f76391c2> | 3.21875 | 204 | Comment Section | Science & Tech. | 51.367125 |
MARS, in astronomy, the outermost of the four earth-like planets revolving about the sun. Its orbit lies completely outside that of the earth, its mean distance from the sun being 141,500,000 miles, and with the single exception of the orbit of Mercury, it has the most eccen tric orbit of the solar system, the greatest... | <urn:uuid:2694438a-2668-4afe-a47c-260ca3d65eaf> | 3.765625 | 1,113 | Knowledge Article | Science & Tech. | 45.44603 |
A little mouse called Delia lives in a hole in the bottom of a
tree.....How many days will it be before Delia has to take the same
Investigate the number of paths you can take from one vertex to
another in these 3D shapes. Is it possible to take an odd number
and an even number of paths to the same vertex?
You can trac... | <urn:uuid:c522f344-e4d8-4a53-afde-8a19de90e064> | 3.0625 | 187 | Tutorial | Science & Tech. | 66.606878 |
Loki, Io: New ground-based observations and a model describing the change from periodic overturn
Article first published online: 6 SEP 2006
Copyright 2006 by the American Geophysical Union.
Geophysical Research Letters
Volume 33, Issue 17, September 2006
How to Cite
2006), Loki, Io: New ground-based observations and a ... | <urn:uuid:4342b6cf-b823-4d0b-8965-5de7a84c5de1> | 2.890625 | 342 | Academic Writing | Science & Tech. | 48.877022 |
Mission Type: Lander, Orbiter
Launch Vehicle: Titan IIIE-Centaur (TC-4 / Titan no. E-4 / Centaur D-1T)
Launch Site: Cape Canaveral, Florida, USA
NASA Center: Jet Propulsion Laboratory, Langley Research Center
Spacecraft Mass: 3,527 kg
1) imaging system
2) atmospheric water detector
3) infrared thermal mapper
1) imaging... | <urn:uuid:aa8e2393-84ed-400b-841e-a01853b00570> | 3.359375 | 684 | Knowledge Article | Science & Tech. | 44.435871 |
“Petroleum-Eating Mushrooms To Decontaminate Our Most Polluted Sites”
“Rather than just waiting for nature to take its course, scientists are now speeding up the process by selecting fungi, microorganisms, and even trees to do the job in just a few years. Mohamed Hijri, a professor of biological sciences and researcher... | <urn:uuid:63f6a390-a99b-4a14-bed7-923c609c8080> | 2.84375 | 184 | Personal Blog | Science & Tech. | 30.185571 |
The American Alligator
The large american alligator, is a feared animal in the wild. It moves as quickly on land as in the water.
The American alligator moves as quickly on land as it does in the water. This alligator makes his home in the warm wetlands and swamps of Florida, Georgia, Texas, Louisiana, and Alabama. He ... | <urn:uuid:376b1ed7-735c-40ca-ad1c-8d93420ecc0f> | 3.078125 | 342 | Knowledge Article | Science & Tech. | 59.881209 |
Take a pristine coral reef off the mangrove-forested coast of Belize, one that draws a handsome roster of fish and other sea creatures--and, therefore, a complement of scuba divers, sports fishermen, photographers, and other consumers of nature. Add an airstrip to serve these cash customers, then a hotel, then a seawal... | <urn:uuid:3da7e03e-872c-46d6-8dc4-b2bdc90dd613> | 2.734375 | 573 | Truncated | Science & Tech. | 40.777667 |
Scientists at the Laboratory for Laser Energetics of the University of Rochester, Rochester, N.Y., have developed a membrane that blocks gas from flowing through it when one color of light is shined on its surface, and permits gas to flow through when another color of light is used.
Eric Glowacki, a graduate student at... | <urn:uuid:4b9af12d-5774-4a3c-ba54-eb959942e81a> | 3.390625 | 687 | Knowledge Article | Science & Tech. | 34.731511 |
The lowest level one is called Xlib. This provides a simple way for a
client program to create a window, show it (map) onto the
screen, and put various graphical things (including text) in the
window. This is illustrated in #fnxlib#1672>.
[Inside the Xlib is all the stuff to implement these simple functions,
and to tur... | <urn:uuid:bd34c376-7bba-40db-82de-993cc27e72a5> | 2.96875 | 275 | Documentation | Software Dev. | 55.327413 |
In our last series of tutorials we worked with Conditionals and Loops to create some basic Perl programs. This time around we are going to be working with files. Text files, CGI files, PL files, boiled files, fried files, Files Benedict, steamed Files. Okay, so I was kidding about the steamed Files.
Creating a file to ... | <urn:uuid:8057bf07-d2c4-4e99-ac39-ed0b6109fae9> | 3.3125 | 386 | Tutorial | Software Dev. | 66.292277 |
The Whales of Southern California project is new extension of our Whales of British Columbia project. Earthwatch scientists have achieved interesting results in British Columbia and are excited to be expanding their project.
The Whales of British Columbia:
From 1994 to 2008, a total of 126 grey whale individuals were i... | <urn:uuid:f9b8ea46-0dff-4643-9088-74ea09a3e90a> | 3.1875 | 582 | Knowledge Article | Science & Tech. | 52.693984 |
Now, the first thing the sceptics say is, "Statistical outlier!" Yes, there are warmer than usual and colder than usual winters. It's the trend line that counts. If the trend line was flat then this winter would be a statistical anomaly. However, the trend line points upwards so winters are getting warmer, year on year... | <urn:uuid:9c6a21fc-ed29-456b-a1c2-a1b62a161514> | 2.921875 | 311 | Personal Blog | Science & Tech. | 57.401129 |
Save Casco Bay from an Oil Spill!
- To demonstrate what happens in an oil spill, fill a glass bottle two-thirds full of water. Add blue food coloring to make the "ocean."
- Pour 1/2-inch or more of cooking oil into the bottle. This is the "oil spill."
Where does the oil congregate? (It floats on the surface)
What happe... | <urn:uuid:78ed640e-7049-41a4-98e3-1ecca33e0fb5> | 4.1875 | 1,149 | Tutorial | Science & Tech. | 63.133431 |
Return a string holding the external representation of the number n in the given radix. If n is inexact, a radix of 10 will be used.
Return a number of the maximally precise representation expressed by the given string. radix must be an exact integer, either 2, 8, 10, or 16. If supplied, radix is a default radix that m... | <urn:uuid:634a0d41-a03d-49d2-8880-67748bb1b0e8> | 2.84375 | 175 | Documentation | Software Dev. | 63.234523 |
(pronounced Air-Dersh) was the most prolific mathematician of all time. He wrote almost 1500 papers with many others, leading to the creation of the Erdös number
, connecting mathematicians to each other by way of their co-authored papers. Even a horse
has an Erdös number of 3. He also had his own language
- if a perso... | <urn:uuid:f32caedc-2e99-475d-abf1-2f863b79caf4> | 2.859375 | 2,327 | Comment Section | Science & Tech. | 54.954427 |
The following HTML text is provided to enhance online
readability. Many aspects of typography translate only awkwardly to HTML.
Please use the page image
as the authoritative form to ensure accuracy.
New Worlds, New Horizons in Astronomy and Astrophysics
eral dark energy projects including the Baryon Oscillations Spect... | <urn:uuid:2ed23b44-3e28-4540-93b8-07b9eb7d368b> | 2.953125 | 579 | Knowledge Article | Science & Tech. | 27.815536 |
For the more information about the geologic resources of the National Park Service, please visit http://www.nature.nps.gov/geology/.
BioBlitz: A Snapshot of Biodiversity
A bioblitz is part rapid biological survey and part a public outreach event that brings together scientists and volunteers to compile a snapshot of bi... | <urn:uuid:3e508fb2-0eab-4f06-a2ad-32bbf7584c4b> | 3.359375 | 351 | Knowledge Article | Science & Tech. | 29.965238 |
Mon Jul 23 23:03:29 BST 2012 by Dirk Pons
I am surprised that the seismologists are surprised about this. Are their fracture models too simplistic? After all we see irregular fracture surfaces and time delays in other fracturing materials. You only have to look at how a piece of stale bread crumbles under load, to appr... | <urn:uuid:808f0008-97f5-4912-b0c1-8e8c665a8ef8> | 2.796875 | 369 | Comment Section | Science & Tech. | 60.809697 |
Many species of scarab beetles, in fact, have very specialized relationships with their environments. Adult male and female Phanaeus difformis dung beetles, for example, work as a team to locate animal dung, shape the dung into so-called brood balls, and dig tunnels where the balls can be stored. The female then lays a... | <urn:uuid:c2fdc3a4-45f8-4339-9ff3-1cac08f0b7b9> | 4.1875 | 785 | Personal Blog | Science & Tech. | 47.998109 |
Why the Earth's air is really an ocean
Explore This Story
The next time you're in Carnegie Hall and the atmosphere seems stuffy, don't blame the upper crust in their box seats. Blame the building's air. It weighs almost 32,000 kilograms.
It's one of many little-known facts about the stuff we breathe that British scienc... | <urn:uuid:30186760-d5e7-44eb-b360-da8d9366af52> | 3.34375 | 1,313 | Truncated | Science & Tech. | 64.366232 |
|Although many people call all insects "bugs," entomologists use the name "bug" to refer only to insects in the order Hemiptera.|
True bugs have all the general characteristics of typical insects. They are divided into three regions: head, thorax and abdomen. The thorax bears legs and wings; the head bears eyes, antenn... | <urn:uuid:6daa3086-12bc-410a-83ad-bc3ce8cb4570> | 3.96875 | 358 | Tutorial | Science & Tech. | 54.855682 |
A viewer asked "Todd, why does fog form so often on fall mornings?"
That's a great question! And remember, fog is actually just a cloud that forms close to the ground. The ingredients needed for it tend to come together during the long, cool nights of fall.
Autumn days can still get relatively warm, with plenty of invi... | <urn:uuid:2d23f04b-0859-4c09-8c39-2410e25006d0> | 3.3125 | 142 | Q&A Forum | Science & Tech. | 66.447853 |
BACKGROUND: Researchers at the University of Arizona have found that the same mathematical formula used to describe the shape of stalactites that form in caves also describes the shape of icicles. This is surprising because the physical processes that form icicles are very different from those that form stalactites. Bo... | <urn:uuid:bd605d94-6c29-4c01-b58d-3a1e2d6ff6d8> | 4.4375 | 563 | Knowledge Article | Science & Tech. | 41.541147 |
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.
May 20, 1996
Credit: EIT Consortium, SOHO project, ESA, NASA
Explanation: Above is an image of the relatively quiet Sun made on May 18 in light emit... | <urn:uuid:e0baa22d-61a5-4a99-8bb6-30c02a73f890> | 3.734375 | 271 | Knowledge Article | Science & Tech. | 37.937821 |
In the constellation Ursa Major
Approximately 1,000 times the mass of the Sun
Diameter equal to the size of Mars
X-ray views from Chandra X-Ray Observatory show a flare-up from the possible black hole. The black hole is just to the right of the green cross, which marks the galaxy's center. It is much brighter in the se... | <urn:uuid:692d8343-0e2f-4b1d-917d-60046fd19a50> | 2.75 | 103 | Knowledge Article | Science & Tech. | 72.073269 |
This is a short article that explains a lot about the field of geoengineering. It introduces the reader to a subject they likely haven’t heard of before, and explains some pressing issues surrounding this technology. Overall, the article conveys its ideas well with the help of good organization and strong transitions.
... | <urn:uuid:2268229c-3322-4ae2-bd2b-f7153e6007c9> | 2.734375 | 277 | Nonfiction Writing | Science & Tech. | 24.345491 |
Spectroscopy and Unknowns
Sarah Madden, Matt Grandbois, Eric Nelson
October 31 and November 7 2000
Chem 120 H / Viste
The purpose of this lab was to identify an unknown using various methods of spectroscopy. The unknown could have contained any or all of these elements: carbon, oxygen, and chlorine. The number of carbo... | <urn:uuid:64b98257-44f1-4422-8b4d-37426dd06dc7> | 3.328125 | 393 | Academic Writing | Science & Tech. | 38.74 |
||It has been suggested that this article be merged into Symbol (chemical element). (Discuss) Proposed since February 2013.|
Only the first letter is capitalised. For example, "He" is the symbol for helium (English name, not known in ancient Roman times), "Pb" for lead (plumbum in Latin), "W" for tungsten (wolfram in G... | <urn:uuid:28e2d019-95f3-45e7-9d45-8e25fd15330c> | 3.828125 | 385 | Knowledge Article | Science & Tech. | 44.543826 |
Can you construct an equilateral triangle? Assume each line has length 2.
Then bi-sect one of the angles (or lines)?
I.e. bi-sect the equilateral triangle?
Which of the lines can now be AD, because it has length root 3?
And then which end of it is best as A, in order to find B?
Actually... that requires a straight edge... | <urn:uuid:97de33d6-2470-4730-b1b2-c6c4780b4b19> | 3.59375 | 307 | Q&A Forum | Science & Tech. | 86.199577 |
The term 'slug' refers to a body type and not a group of closely related animals. The slug form has evolved several times in both land and marine molluscs.
A Leopard Slug, Limax maximus
Photographer: Alan Henderson / Source: Museum Victoria
Land snails and slugs belong to the Phylum Mollusca, the second-largest Phylum ... | <urn:uuid:fbd280c2-8873-4e4e-b6f7-40771d283a54> | 3.65625 | 523 | Knowledge Article | Science & Tech. | 55.479649 |
Sun Screen Strength
A student in the science fair tried sun screen on light
sensitive plastic beads... they all turned color, indicating the screen
didn't work. Is this a valid test of the strngth of sun screen? Ideas?
What would be the effect if no-sun screen was used.
Would the beads change color to a larger extent?
... | <urn:uuid:c495d7b5-f95f-4170-be11-4876ac2234ab> | 3.109375 | 478 | Q&A Forum | Science & Tech. | 65.490333 |
- Original Caption Released with Image:
This three-frequency space radar image shows the city of Samara, Russia in pink and light green right of center. Samara is at the junction of the Volga and Samara Rivers approximately 800 kilometers (500 miles) southeast of Moscow. The wide river in the center of the image is the... | <urn:uuid:60eafc07-e022-4a0b-9fdb-4fbde07c24c3> | 3.375 | 416 | Knowledge Article | Science & Tech. | 40.850504 |
Square symmetric matrices (or rather complex Hermitian ones) represent the observables of a quantum mechanical system. Their eigenvalues represent the possible observed values in ideal experiments. There is a basis of orthonormal eigenvalues, which allows you to write any state vector as a linear combination (superposi... | <urn:uuid:aa53f9b8-f683-487c-afa4-9b1e368ad5fd> | 3.109375 | 431 | Q&A Forum | Science & Tech. | 45.418763 |
Aligning F-ATPase alpha and beta subunits
Change color chainD to grey/blue (rightclick in control panel on D in first column to select chain D, right click on COL, select color)
Scrol down the control panel and select all ATP analogs (press ctrl key and right click to select)
right click on COL in heading and select re... | <urn:uuid:95754a52-1dcf-42fb-8876-d317170d513a> | 3.109375 | 703 | Tutorial | Science & Tech. | 54.418952 |
C++ virtual function is a member function of a class, whose functionality can be over-ridden in its derived classes. The whole function body can be replaced with a new set of implementation in the derived class. The concept of c++ virtual functions is different from C++ Function overloading.
C++ Virtual Function - Prop... | <urn:uuid:fb4da04f-50d3-4c02-99a0-8d78f0600678> | 4.375 | 582 | Documentation | Software Dev. | 45.391575 |
Plunge into the Papuan Bird’s Head Seascape in eastern Indonesia and you’ll be stunned at what lies beneath. Across the seascape live 1,300 types of reef fishes and nearly 600 species of hard corals – not to mention whales, crocodiles, and the crowd favorite: a walking shark.
Dive headfirst off the west coast of Centra... | <urn:uuid:6a7bff1e-ad53-44a9-97b9-60a0731981ff> | 2.71875 | 262 | Knowledge Article | Science & Tech. | 40.763669 |
Threads and processes are the basic units of execution in concurrent Java programming. Every process has at least one thread, and all of the threads in a process share its resources. Understand the benefits of threads and why it's essential to use them safely.
Learn how to use the thread-safe, well-tested, high-perform... | <urn:uuid:b5f75ba4-1d0f-4e59-b64e-7176392e5da2> | 3.140625 | 224 | Truncated | Software Dev. | 40.417214 |
The atomic number indicates the number of protons within the core of an atom. The atomic number is an important concept of chemistry and quantum mechanics. An element and its place within the periodic table are derived from this concept.
When an atom is generally electrically neutral, the atomic number will equal the n... | <urn:uuid:944ebe69-f8d3-434d-b7d9-e1036321ce6c> | 3.96875 | 1,633 | Knowledge Article | Science & Tech. | 39.097799 |
Bonds between atoms shape the molecules of the atmosphere, the ocean, and and everything between them. Covalent bonding is one of the mechanisms that holds atoms together in compounds. Water is held together by covalent bonds as are carbon dioxide and ammonia.
What is chemical bonding?
Chemical bonding joins atoms into... | <urn:uuid:13427914-8e1a-4cfc-b4c2-dbb2b5e6208c> | 4.15625 | 669 | Knowledge Article | Science & Tech. | 39.520831 |
write-byte byte stream => byte
Arguments and Values:
byte---an integer of the stream element type of stream.
stream---a binary output stream.
write-byte writes one byte, byte, to stream.
(with-open-file (s "temp-bytes" :direction :output :element-type 'unsigned-byte) (write-byte 101 s)) => 101
stream is modified.
The e... | <urn:uuid:063abd93-d100-4e35-84d7-0f9736f2b77e> | 2.953125 | 166 | Documentation | Software Dev. | 59.234408 |
Maintained by FAO-FI
|What is Rio+20 ?|
|Rio+20 Conference brought together world leaders, along with thousands of participants from governments, the private sector, NGOs and other groups to shape how we can reduce poverty, advance social equity and ensure environmental protection. It was hosted by the Government of Br... | <urn:uuid:c124b584-f6dd-48bf-90da-f6f99e083525> | 2.6875 | 403 | Knowledge Article | Science & Tech. | 26.264251 |
Summary: Hash Tables Page 1
· All elements have a unique key.
o Insert element with a specified key.
o Search for element by key.
o Delete element by key.
· Random vs. sequential access.
· If we have duplicate keys, need rule to resolve ambiguity.
· What ways could you use to implement a dictionary? (Name in class)
o O... | <urn:uuid:3e888568-b721-4f4c-a633-b7c4c30505ae> | 3.3125 | 152 | Documentation | Software Dev. | 55.592727 |
infrared image of the star formation region Messier 17. Three
infrared wavebands, from 1 to 2.2 microns, have been combined
to provide a visual representation of the region as if we had
infrared eyesight. The circles show the regions studied with
the UNSWIRF camera - the northern and south-western bars of
the M17. Orig... | <urn:uuid:1c7e14e3-2de1-447d-bdf2-7e589df50b1a> | 3.3125 | 783 | Academic Writing | Science & Tech. | 43.634399 |
The Blacktip shark, Carcharhinus limbatus, is a large shark, native to the continental and insular shelves of tropical and warm temperate seas around the world.
The Blacktip is a large fairly stout shark, grey in color, normally with black-tipped fins. It has a long, narrow, pointed snout, long gill slits, a large firs... | <urn:uuid:757b160e-dddc-4546-822a-5d3ad095f785> | 3.765625 | 456 | Knowledge Article | Science & Tech. | 45.245047 |
Sep. 19, 2005 Images returned during Cassini's recent flyby of Titan show captivating evidence of what appears to be a large shoreline cutting across the smoggy moon's southern hemisphere. Hints that this area was once wet, or currently has liquid present, are evident.
"We've been looking for evidence of oceans or seas... | <urn:uuid:1e5469f2-8548-4970-a7ee-1507db24b305> | 3.421875 | 855 | Truncated | Science & Tech. | 45.489967 |
SQLIPA: An Authentication Mechanism Against SQL Injection
Web application has been developed with very rapid progress. Web applications use database at backend for storing data and SQL for insertion and retrieval of data. There are some malicious attacks which can deceive this SQL. These attacks are called SQL injectio... | <urn:uuid:63a7d14e-96c4-43a5-bff1-88b5a5f7e56a> | 2.84375 | 129 | Academic Writing | Software Dev. | 30.591667 |
Fuel cells are the dream power source for vehicles: they can use hydrogen and oxygen as fuel and oxidizer, respectively, and produce only electricity and water (plus a little heat). Compared to battery-powered electric vehicles, hydrogen-powered fuel cell vehicles offer higher energy density, which leads to greater ran... | <urn:uuid:7eadc95d-955a-4d8d-819d-ee42152a0431> | 4 | 2,499 | Knowledge Article | Science & Tech. | 36.433148 |
For many years now, volunteers working from home —people like you— have been able to help scientists with important problems.
In the first wave of these “citizen science” projects, people simply lent their computers to help solve problems that could be farmed out in pieces to thousands of machines. Among the first of t... | <urn:uuid:b9a45a6b-5ebb-4536-8346-55eb5b52207c> | 3.171875 | 454 | Personal Blog | Science & Tech. | 46.096212 |
WCSCMP(3) Linux Programmer's Manual WCSCMP(3) NAME wcscmp - compare two wide-character strings SYNOPSIS #include <wchar.h> int wcscmp(const wchar_t *s1, const wchar_t *s2); DESCRIPTION The wcscmp() function is the wide-character equivalent of the strcmp(3) function. It compares the wide-character string pointed to by s... | <urn:uuid:de47810e-01fb-405d-ae41-66825e0bc6b3> | 2.6875 | 323 | Documentation | Software Dev. | 84.855936 |
MessageToEagle.com - Ants actively leave their nests before death and break up all social contact.
This social withdrawal is not due to manipulation through pathogens or parasites but it appears to be an altruistic act of the ants themselves.
The ants use chemistry and crowdsourcing, according to the research published... | <urn:uuid:69ef7040-4420-40ab-8f81-cb72858e14f7> | 3.0625 | 1,148 | Content Listing | Science & Tech. | 49.64632 |
More Logo for beginners. Now learn more about the REPEAT command.
At what angle should you release the shot to break Olympic records?
Turn through bigger angles and draw stars with Logo.
More Logo for beginners. Learn to calculate exterior angles and draw regular polygons using procedures and variables.
What happens wh... | <urn:uuid:03fa3402-e641-4e58-ac14-d28651e407dc> | 3.09375 | 629 | Content Listing | Science & Tech. | 55.92703 |
View all of the Antarctic Hemisphere daily maps of total ozone for February 1982. Satellite instruments monitor the ozone layer, and we use their data to create the images that depict the amount of ozone.
Click any map image to bring up a new page with a high-resolution map.
Missing areas (bad orbits and polar night) a... | <urn:uuid:a70ed016-a61d-498f-9f51-d41cab1f23b3> | 3.3125 | 184 | Structured Data | Science & Tech. | 41.27138 |
NASA's Mars Exploration Rover Opportunity used its microscopic imager to get this view of the surface of a rock called "Block Island" during the 1,963rd Martian day, or sol, of the rover's mission on Mars (Aug. 1, 2009). The triangular pattern of small ridges seen at the upper right in this image and elsewhere on the r... | <urn:uuid:27881946-df5f-4877-92ae-fac550fa89f7> | 3.59375 | 352 | Knowledge Article | Science & Tech. | 44.522555 |
This image shows a "bite mark" where NASA's Curiosity rover scooped up some Martian soil. The first scoop sample was taken from the "Rocknest" patch of dust and sand on Oct. 7, 2012, the 61st sol, or Martian day, of operations. A third scoop sample was collected on Oct. 15, or Sol 69, and deposited into the Chemistry a... | <urn:uuid:62cacd6f-4b6b-4ea6-aea7-a965e94f8984> | 3.5 | 179 | Truncated | Science & Tech. | 50.813513 |
HR 8799Article Free Pass
HR 8799, star that has the first extrasolar planetary system to be seen directly in an astronomical image. HR 8799 is a young (about 60 million years old) main-sequence star of spectral type A5 V located 128 light-years from Earth in the constellation Pegasus. Observations of this star taken by... | <urn:uuid:46a7ed4d-6ff8-4df0-b4b6-b6e6a58de2c6> | 3.546875 | 413 | Knowledge Article | Science & Tech. | 86.992303 |
ne much-lauded feature of PostgreSQL is transactions. Transactions in a database help prevent accidental data loss or misrepresentation.
For example, let's say you want to delete records from a table. In PostgreSQL the command is:
template1=# DELETE FROM foo;
However, the above command will delete all of the records in... | <urn:uuid:2c169043-3e18-4682-a43c-0f641f4f47a0> | 2.984375 | 414 | Tutorial | Software Dev. | 39.538666 |
Here we are providing you an example with code that retrieves all columns name in a specific database table. Sometimes, you need to know the number of columns and the names of the columns of the table, so you can retrieve it with the help of this example. See detail information given below:
Description of program:
Crea... | <urn:uuid:b3243a48-6b00-4797-934c-0dfedc2577f5> | 2.875 | 292 | Documentation | Software Dev. | 45.437189 |
In mathematics, an operator is a function, usually of a special kind depending on the topic. An operator is a function that acts on functions to produce other functions. A operator symbol or operator name is a notation that denotes a particular operator.
There are many types of operators.
The code of the program is giv... | <urn:uuid:21950a0a-1713-41ad-bab1-6dc4abe6d6ca> | 3.84375 | 315 | Documentation | Software Dev. | 39.276969 |
Imagine you’ve been working on a problem for days, maybe even weeks, but you can’t seem to figure it out. Your brain is working over solutions constantly but you feel stumped. So, you take a break. You walk down the street to the nearest coffee shop but as you’re walking home, sipping your drink and watching cars drive... | <urn:uuid:8629d154-b6c0-4732-af19-2e98defac18c> | 2.875 | 828 | Personal Blog | Science & Tech. | 37.06154 |
Happy New Year! Tomorrow is the first day of 2009. So what an appropriate time to look back and see what we have accomplished in science over the past years on this day.
On New Years Day, 1801, the dwarf planet Ceres was discovered by Giuseppe Piazzi. This dwarf planet is actually located inside our solar system, it is... | <urn:uuid:ed3796c7-03ab-419a-bf66-d9c3f0ede9f2> | 3.578125 | 354 | Personal Blog | Science & Tech. | 54.085562 |
Date of this Version
As natural predators of pest insects, woodland birds provide biological pest suppression in crop fields adjacent to woody edges. Although many birds using these habitats forage widely, earlier studies have found that most foraging activity occurs within 50 m of the woody edge. The goals of this stu... | <urn:uuid:05b644dc-4f43-4d53-bf9c-b3a0c79f28d1> | 3.5 | 407 | Academic Writing | Science & Tech. | 34.846136 |
Posted Dec 8, 2005 10:03 UTC (Thu) by pkolloch
Parent article: The Boost C++ Libraries
One of the very impressive features are lambda functions (IMHO):
for_each(a.begin(), a.end(), std::cout << _1 << ' ');
"std::cout << _1 << ' '" defines lambda function object taking one parameter.
Unfortunately, one cannot totally fr... | <urn:uuid:33ddd468-a825-4df3-96ce-64017c8893d7> | 3.0625 | 233 | Comment Section | Software Dev. | 54.691172 |
Name: Kate A Shuchter
We are teachers in Colorado planning to work with fluid transport and
capillary action in vascular plants. According to our memories, at 33 feet the
forces of capillary action and gravity cancel each other out.
We would like to explore how a 100 foot tree can transport water to its
top. We are loo... | <urn:uuid:107893e0-a45e-49e9-ba20-be1eda54e3fb> | 3.390625 | 148 | Truncated | Science & Tech. | 56.255385 |
All these activities have something to do with multiplying and dividing. Can you spot the connections?
Put operations signs between the numbers 3 4 5 6 to make the highest possible number and lowest possible number.
On the planet Vuv there are two sorts of creatures. The Zios have 3 legs and the Zepts have 7 legs. The ... | <urn:uuid:0c60e951-db29-4a0a-9214-c6650e538fa0> | 3.421875 | 140 | Tutorial | Science & Tech. | 69.144115 |
- Calculate the EMT of the following weapons: 50 Mt, 10 Mt, 1 Mt, 100 Kt, 10 Kt.
- How much energy is contained in 1 Mt of TNT?
- If the overpressure is 20 psi, what is the associated wind velocity?
- What is the Mach Stem?
- Why is an overpressure of 'only' 5 p.s.i. likely to result in a 50% mortality rate for the occ... | <urn:uuid:f76b3281-4141-40eb-bbce-09f232f3021c> | 3.375 | 443 | Tutorial | Science & Tech. | 72.813382 |
This image shows soil delivery to NASA's Phoenix Mars Lander's Microscopy, Electrochemistry and Conductivity Analyzer (MECA). The image was taken by the lander's Surface Stereo Imager on the 131st Martian day, or sol, of the mission (Oct. 7, 2008).
At the bottom of the image is the chute for delivering samples to MECA'... | <urn:uuid:fe222e66-b704-46bb-8b6d-d4c2de576da8> | 3.21875 | 314 | Knowledge Article | Science & Tech. | 47.627581 |
Dr. James Lovelock roposed the GAIA concept. Few ideas have ignited more contentious debate within the modern scientific community than James Lovelock's Gaia hypothesis -- the proposal that the Earth can be viewed as a superorganism with the capacity to regulate its internal environment. Lovelock, an atmospheric chemis... | <urn:uuid:2b21c3cb-5196-48d2-aa50-5c3ddc355c4f> | 3.359375 | 189 | Q&A Forum | Science & Tech. | 32.599596 |