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North Pole Environmental Observatory (NPEO) Oceanographic Mooring Data, 2001-2002
This data set, acquired with an oceanographic bottom-anchored mooring, includes sea-ice draft and depth data, conductivity, temperature, pressure, salinity, and ocean current measurements such as speed and direction. Each mooring contains... | <urn:uuid:85f003ba-56cc-46cc-b6a8-b9178930b1ab> | 3.046875 | 361 | Knowledge Article | Science & Tech. | 35.500763 |
Tonight, in the final televised debate ahead of the election, the three main party leaders will talk about the economy, the recession, public sector debt, spending or cuts, and more. All will use statistics to back up their points or to pull apart their opponents' arguments. But how can we work out whether to believe t... | <urn:uuid:f522fd61-f12e-4e67-981a-fe2d8a7b7180> | 2.78125 | 497 | Content Listing | Science & Tech. | 37.970647 |
The Role of Ocean Phenomena
The sea's influence on climate is periodically highlighted by two ocean phenomena that exert dramatic influences on weather patterns across the United States and many other countries. These phenomena are called El Nino and La Nina.
During an El Nino event, which usually lasts about a year an... | <urn:uuid:4e160463-1043-4c1d-b17f-a7319cd0e577> | 3.921875 | 522 | Knowledge Article | Science & Tech. | 40.855646 |
Dragon is a free-flying, reusable spacecraft developed by SpaceX under NASA’s Commercial Orbital Transportation Services (COTS) program. Initiated internally by SpaceX in 2005, the Dragon spacecraft is made up of a pressurized capsule and unpressurized trunk used for Earth to LEO transport of pressurized cargo, unpress... | <urn:uuid:ed5edb21-79d4-4fca-8142-29210df3cecf> | 3.40625 | 392 | Knowledge Article | Science & Tech. | 24.872104 |
28 November - 4 December 2011
Click on images for larger versions
menziesii) forest & clearcut
Credit & Copyright:
Bruce G. Marcot, Ph.D.
Explanation: Last week we explored how sea level rise can cause the demise of a coastal forest. This week we are well inland ... in the Cascade Mountains of southern Washington state... | <urn:uuid:37bea5eb-c21b-4e96-987f-52576ca9c7f6> | 3.71875 | 577 | Nonfiction Writing | Science & Tech. | 60.753054 |
Yes, I do remember. Of course, it's true, but it also depends on how you look at it. If you include the earth in the system, then momentum is conserved, but that's not saying much of use. If a fast car hits a solid wall and comes to a dead stop, there's nothing to be gained by claiming momentum is conserved in the car-... | <urn:uuid:d98c1743-1e4b-4fc9-9cb8-a2dee680c598> | 2.859375 | 1,141 | Comment Section | Science & Tech. | 52.989199 |
There has been some big promises made by governments when it comes to the concept of the wind farm. The wind turbine has been touted as a way to promote clean energy, but in fact these devices have an historical flair that goes back to the days when they were used as a mechanical device to turn machinery.
Of course, to... | <urn:uuid:ed8759a0-da39-4469-a5e1-b7ee12693c86> | 3.15625 | 546 | Personal Blog | Science & Tech. | 40.574022 |
|Electron Correlation in Iron-Based Superconductors|
In 2008, the discovery of iron-based superconductors stimulated a worldwide burst of activity, leading to about two preprints per day ever since. With a maximum superconducting transition temperature (so far) of 55 K, it is natural to wonder if studying the new mater... | <urn:uuid:dcb48b53-8f11-473f-9410-d93b57630d62> | 3.203125 | 1,313 | Knowledge Article | Science & Tech. | 37.166312 |
|One of the brightest supernovas in recent years has just been recorded in the nearby Whirlpool galaxy (M51).
Surprisingly, a seemingly
similar supernova was recorded in M51 during 2005, following yet another one that occurred in 1994.
Three supernovas in 17 years is a lot for single galaxy, and reasons for the
superno... | <urn:uuid:be08e219-d988-4ab2-8ac1-5836fcf7a6d7> | 3.03125 | 279 | Content Listing | Science & Tech. | 34.496808 |
The Color of Ancient Ink
Generally animal tissue, made up mostly of protein, degrades quickly. Over the course of millions of years, the only traces an animal leaves behind are likely skeletal remains or an impression of the shape of the animal in surrounding rock. Scientists can learn much about an animal by its bones... | <urn:uuid:40642c59-82b0-44b2-bda9-40bb1e4bcd6e> | 4.0625 | 465 | Knowledge Article | Science & Tech. | 40.611679 |
Belowground Carbon Storage in a Grassland Community
Adair, E.C., Reich, P.B., Hobbie, S.E. and Knops, J.M.H. 2009. Interactive effects of time, CO2, N, and diversity on total belowground carbon allocation and ecosystem carbon storage in a grassland community. Ecosystems 12: 1037-1052.
Results indicated that annual TBCA... | <urn:uuid:1cc27fb9-465a-46b7-8117-c5dc75470bff> | 2.765625 | 252 | Academic Writing | Science & Tech. | 44.403799 |
I'm working on a program that will take an input (i.e: "This is a test"), and outputs it scrambled, but having the first and last letter of each word in the same place (i.e: "Tihs is a tset"). I know that I should first separate the input string into their own string values. I'm aware of using input.split(), but I'm no... | <urn:uuid:bd7b149e-9444-4a10-bc35-6be7c054893b> | 3.21875 | 253 | Comment Section | Software Dev. | 82.210294 |
A new study has found that there are vastly more geothermal power resources here in the US than previously considered. http://www.tgdaily.com/sustainability-f ... tudy-shows
Quotations from this article:
The US has the geothermal resources to produce ten times as much power as the current installed capacity of coal pla... | <urn:uuid:33c89db7-2e14-418e-b4a3-1d53aca58fa7> | 2.96875 | 229 | Comment Section | Science & Tech. | 41.115122 |
For millennia, climatic fluctuations have sent stressed-out species to extinction and promoted rapid evolutionary change in those left behind. In Extreme Environmental Change and Evolution Ary Hoffmann and Peter Parsons explore in detail how environmental extremes can expose natural populations to the hard glare of nat... | <urn:uuid:200a2c2c-fbdd-4703-b2b9-35b488899ecb> | 3.09375 | 110 | Truncated | Science & Tech. | 30.286471 |
Improve your problem-solving skills with problems, answers and solutions from The Calculator Pad.Flickr Physics
Visit The Physics Classroom's Flickr Galleries and take a visual tour of projectile motion.Shockwave Studios
Think you get the idea? Try the Hit the Target activity at the Shockwave Studios.
Try something new... | <urn:uuid:d0ad397c-1679-4074-a2d2-0b5b0e5d0c5d> | 4.1875 | 2,218 | Tutorial | Science & Tech. | 51.628427 |
According to a report published in Nature: Climate Change, coralline algae, which acts as a sort of glue that holds coral organisms themselves together, is more resistant to ocean acidification that previously thought.
The reports' lead author, Merinda Nash, a doctoral student at the Australia National University in Ca... | <urn:uuid:d0561f56-e4b7-4326-845d-ac9adeff78a9> | 3.65625 | 1,007 | Audio Transcript | Science & Tech. | 47.046964 |
© Denis Scott/Corbis
Will we see it coming?
A lack of cash could end the only survey dedicated to searching the southern skies for Earth-grazing comets and asteroids
. That would create a blind spot in our global view of objects that could cause significant devastation should they hit Earth.
The Siding Spring Survey
us... | <urn:uuid:1d16731c-5658-470e-b53d-d6552f4f090e> | 3.546875 | 1,047 | Truncated | Science & Tech. | 50.045301 |
Pulickel M. Ajayan1 and Otto Z. Zhou2
Department of Materials Science and Engineering Rensselaer Polytechnic Institute, Troy, NY 12180-3590, USA Ajayan@rpi.edu Curriculum in Applied and Materials Sciences Department of Physics and Astronomy University of North Carolina at Chapel Hill Chapel Hill, NC 27599-3255, USA Zho... | <urn:uuid:15cbce36-2c4f-4bc8-822a-e8bb667baf31> | 3.015625 | 565 | Academic Writing | Science & Tech. | 27.037069 |
NetCDF APIs are available for most programming languages used in the geosciences.
The C API
The C library is the core implementation on which non-Java interfaces are built.
The Java API
The netCDF Java library provides advanced capabilities not available in C-based APIs.
The Fortran-90 API
The Fortran-90 library provid... | <urn:uuid:ccf2d277-4c7d-451f-8fc9-aa74107a68e2> | 2.84375 | 252 | Documentation | Software Dev. | 43.4475 |
Horsefly, or Gadfly, a large fly that irritates domestic animals, primarily horses, cattle, and hogs. It is a carrier of anthrax and tularemia (rabbit fever).
The black horsefly is about one inch (2.5 cm) long. It has a broad head, brownish-black wings, and a beaklike mouth. The mouth is adapted to feeding on liquid—th... | <urn:uuid:787d5211-284f-4e9c-a3c5-b733c6aece87> | 2.96875 | 164 | Knowledge Article | Science & Tech. | 60.31 |
Cosmic timeline 05
The Large Hadron Collider (LHC) is the world’s largest and highest-energy particle accelerator, intended to collide opposing particle beams of either protons at an energy of 7 TeV per particle, or lead nuclei at an energy of 574 TeV per nucleus. It is expected that it will address the most fundamenta... | <urn:uuid:536856e3-15e7-4aaa-a6e1-ceec78cd6063> | 3.328125 | 959 | Content Listing | Science & Tech. | 34.671061 |
One of the most fascinating exchanges I had with renowned astronomer Dr. Frank Drake this week did not make it into today’s story.
Dr. Frank Drake (seti-inst.edu)
Drake, 78, became the first person ever to search for signals from unknown neighbors when he tuned a radio receiver to the stars in 1960.
Now a leading voice... | <urn:uuid:61bdad6a-3a18-4830-a1aa-c24b7735fa73> | 3.078125 | 622 | Personal Blog | Science & Tech. | 60.764647 |
A simple example (this is not recommended as a real way of generating HTML!):
from contextlib import contextmanager @contextmanager def tag(name): print("<%s>" % name) yield print("</%s>" % name) >>> with tag("h1"): ... print("foo") ... <h1> foo </h1>
At the point where the generator yields, the block nested in the wit... | <urn:uuid:2eac2388-554b-4b77-86ef-b622b267e997> | 2.796875 | 765 | Documentation | Software Dev. | 42.618658 |
How the Leopard Got His Spots
In one of his celebrated just-so stories, Rudyard Kipling recounted how the leopard got his spots. But taking this approach to its logical conclusion, we would need distinct stories for every animal's pattern: the leopard's spots, the cow's splotches, the panther's solid colors. And we wou... | <urn:uuid:3e545b8b-0f86-465f-891e-4807e9848fd9> | 3.5625 | 493 | Knowledge Article | Science & Tech. | 32.650627 |
U.S. Climate Extremes IndexEntry ID: gov.noaa.ncdc.C00571
Abstract: The Climate Extremes Index (CEI) is a study prepared by and available from the National Climatic Data Center (NCDC). The CEI was first presented in 1995 as a framework for quantifying observed changes in climate within the contiguous United States. The... | <urn:uuid:28b2ee83-e95b-42c7-a53f-b4eabd5c64ad> | 2.765625 | 337 | Structured Data | Science & Tech. | 32.54875 |
In Arrays.qsort the methods Float.compare and Double.compare are used depending on the values in the array. The compare operations perform the following (copied from GNU Classpath):
return isNaN ? 0 : 1;
// recall that 0.0 == -0.0, so we convert to infinites and try again
if (x == 0 && y == 0)
return (int) (1 / x - 1 /... | <urn:uuid:b7ad3e08-fe9d-4f8a-ac16-6806500b2138> | 2.8125 | 183 | Q&A Forum | Software Dev. | 84.867375 |
Thawing Permafrost in the Arctic Will Speed Up Global Warming
On the hill above Toolik Field Station, Gaius Shaver has been running experiments for more than 30 years to determine how fertilizer changes the tussock tundra’s floral medley. His test plots, north of Toolik Lake, are accessible only by a mazelike wooden wa... | <urn:uuid:abbdfda2-8898-496f-b0b6-4996cbf60e8c> | 3.75 | 1,245 | Truncated | Science & Tech. | 52.034664 |
Single (left) and multibeam (right) echo sounding of the seafloor. Single beam systems typically have beam widths of 10-30 degrees and estimate depth by measuring the shortest slant range to the seafloor within the main beam. Multibeam (swath sonar) systems provide a series of slant range and elevation angle estimates ... | <urn:uuid:349137bb-97d9-46f3-9535-97c41447e783> | 3.5 | 122 | Knowledge Article | Science & Tech. | 41.367103 |
My Wikipedia suggestion for this problem is Faraday's law of induction. They sum it up in pretty much a single quote.
The induced electromotive force (EMF) in any closed circuit is equal to the time rate of change of the magnetic flux through the circuit.
There are lots of technicalities of motors and generators, but t... | <urn:uuid:bac2f75f-ba86-472c-84b6-b49002ff07f6> | 3.359375 | 444 | Q&A Forum | Science & Tech. | 42.693513 |
|Projects in Scientific Computing: New Understanding of Life and Its Processes|
Research that offers promise
for reducing side-effects
If there were a mantra for molecular biologists, it might be this: Structure and function are related, two sides of a coin. To know how a protein does its job inside a living cell, look... | <urn:uuid:be3c5f80-65ea-4e15-8487-c0c6dcbc06d4> | 2.828125 | 2,423 | Knowledge Article | Science & Tech. | 32.225768 |
The fire triangle is used to show the rule that a fire needs three things to burn. These things are heat, fuel, and oxygen. If one of these three is removed, the fire will be put out. In the middle of the fire triangle there is also a chemical reaction
Without heat, a fire cannot begin. If a fire becomes cool enough, i... | <urn:uuid:35fcb161-a49d-45f8-89fc-c11422d80dda> | 4.4375 | 253 | Knowledge Article | Science & Tech. | 57.903295 |
Trees rings were reliable for thousands of years, but (like everyone else) they quit doing their job properly in the 1960s. Fortunately, we have conscientious climate scientists like Michael Mann to show the trees what they should have been doing.
Not to be outdone at hiding the decline, Hansen and USHCN showed that th... | <urn:uuid:7cedf6f9-89d2-49df-bd00-d021d6d501b1> | 2.90625 | 152 | Personal Blog | Science & Tech. | 54.222032 |
Global Warming Science - www.appinsys.com/GlobalWarming
[last update: 2011/01/08]
The Union of Concerned Scientists’ (UCS) “Climate Choices” web site (published in 2006) says: “here in the Northeast, the climate is changing. Records show that spring is arriving earlier, summers are growing hotter, and winters are becom... | <urn:uuid:09b8c091-f79f-4743-9503-158b13b8d556> | 3.234375 | 1,108 | Knowledge Article | Science & Tech. | 65.779754 |
How strange could alien life be?
indication that the fundamental elements that compose most terrestrial life forms
might differ out in the universe was found in unusual
Mono Lake in
Bacteria in Mono's lakebed gives
that it not only can tolerate a large abundance of normally toxic
but possibly use arsenic as a replaceme... | <urn:uuid:ac38ddb0-9993-46a2-aa94-2ecbf8b6aafb> | 2.78125 | 168 | Truncated | Science & Tech. | 23.7656 |
Simply begin typing or use the editing tools above to add to this article.
Once you are finished and click submit, your modifications will be sent to our editors for review.
discovery by CoRoT
...have been called “super-Earths.” Its density is similar to that of Earth, and thus it is a rocky planet like Earth, the firs... | <urn:uuid:4391cd11-ee0f-4d13-83b9-5295d5c59cd0> | 3.0625 | 161 | Knowledge Article | Science & Tech. | 68.512203 |
At the interface between the two materials, e.g. air and water, light may be reflected at the interface or refracted (bent) into the new medium.
For Reflection the angle of incidence = angle of reflection.
For Refraction the light is bent when passing from one material to another, at an angle other than perpendicular.
... | <urn:uuid:726315e9-8d3c-412c-9660-e1bd32e396f3> | 4.21875 | 304 | Knowledge Article | Science & Tech. | 57.444118 |
In my article on parallel merge, I developed and optimized a generic parallel merge algorithm. It utilized multiple CPU cores and scaled well in performance. The algorithm was stable, leading directly to Parallel Merge Sort. However, it was not an in-place implementation. In this article, I develop an in-place parallel... | <urn:uuid:ef30415b-999c-4e19-8443-3967628122c0> | 3.125 | 669 | Knowledge Article | Software Dev. | 52.563447 |
Name: Mike S.
I think I understand the basics of a homopolar generator.
A disc is spun in front of a magnet and an electrical current flows
in the disc. my question is, Can the disc be attached to the
magnet (insulated and glued) and have both spun together and have an
electrical current formed on the disc? The reason ... | <urn:uuid:3bdbd406-2560-4a73-9e21-f6f0cf72f919> | 3.078125 | 444 | Q&A Forum | Science & Tech. | 58.390072 |
(Picture - fotosearch)The Brightest Planet
It is visible with the naked eye in the southern skies of Africa and I'm sure for many other continents, in South Africa you can spot it in the eastern sky from as early as 7:15 pm and looks like a bright shining star.
Venus and Earth are similar in size, mass, density, compos... | <urn:uuid:d9efd731-ba5a-49a3-8883-b7cc20a23bcc> | 3.875 | 767 | Comment Section | Science & Tech. | 41.17781 |
The aim of this study was to develop an understanding of the interactions between glaciers and their permafrost beds that will permit models of glaciers to realistically parameterise ice motion. Improvement of such models is central to their success in predicting glacier response to climate change. A multifaceted inves... | <urn:uuid:3ba9450a-5152-4222-9488-ceb97717d99c> | 2.984375 | 298 | Academic Writing | Science & Tech. | 24.444474 |
In addition to this Mono Lake discovery changing the basic understanding of life — oh, you know, no big deal — some scientists say that this outstanding finding could mean great things for the advancement of green technology. First off, because this microbe literally builds itself out of arsenic, it could be a key elem... | <urn:uuid:b57a61bf-6517-4a56-bd21-25d917acce09> | 3.15625 | 264 | Truncated | Science & Tech. | 36.407857 |
is a unit of absorbed radiation
dose. The rad was first proposed in 1918 as "that quantity of X rays which when absorbed will cause the destruction of the malignant mammalian
cells in question..." It was defined in CGS units
in 1953 as the dose causing 100 ergs
of energy to be absorbed by one gram
of matter. It was res... | <urn:uuid:f026ec7c-a6b2-488d-8012-26df38f607cc> | 3.5625 | 341 | Knowledge Article | Science & Tech. | 68.697549 |
public abstract class Permission
A Permission represents the status of the caller's permission to perform a certain action.
You can query if the action is currently allowed and if it is possible to acquire the permission so that the action will be allowed in the
There is also an API to actually acquire the permission a... | <urn:uuid:f9cdc050-32db-4bf4-a8e3-bceeef4db4c0> | 2.71875 | 140 | Documentation | Software Dev. | 36.296539 |
Massive glitch moves magnetar modelling forward
12 Apr 2012
The chance discovery with ESA's INTEGRAL observatory, in 2004, of highly energetic X-rays emanating from a young neutron star with an extremely strong magnetic field, provided scientists with a challenge: to explain how these objects, also known as magnetars, ... | <urn:uuid:2d5985c1-835b-46d1-aa74-fd18b6a68e4f> | 3.53125 | 2,055 | Knowledge Article | Science & Tech. | 38.258873 |
Heavy Rain in the U.S. Midwest
Image produced by Hal Pierce (SSAI/NASA GSFC) and caption by Steve Lang (SSAI/NASA GSFC).
Severe storms brought heavy rain to the mid-section of the United States when a developing area of low pressure over the Central Plains combined with high pressure anchored off the Southeast coast of... | <urn:uuid:d9a3cc0c-e9a4-4d14-b9e6-e2cc39b04bc4> | 3.25 | 400 | Knowledge Article | Science & Tech. | 47.380605 |
ENSO forecast based on tidal forcing with an Artificial Neural Network
Investigation submitted by Per Strandberg
Here on this page, you are going to find evidence that tidal forcing is one of the most important, if not the most important driver for ENSO variations. That tidal forcing could be the main explanation for E... | <urn:uuid:3da28564-99a1-4405-9c7d-3af44f415967> | 3.125 | 2,718 | Personal Blog | Science & Tech. | 51.199779 |
by Robert Wilkinson
It seems that the Sun is unusually calm these days. That's not necessarily a good thing, since the last time it was this calm World War I broke out soon thereafter. If you want to read some fascinating speculation about the Sun, Sunspots, and the like, let's take a short trip down Science Lane just ... | <urn:uuid:7d100700-318b-4b5f-89a6-b6b6fcd0b3b5> | 3.125 | 1,265 | Personal Blog | Science & Tech. | 54.076238 |
PAUL N. HIRTZ is president of Thermochem, Inc., and has worked as a chemical engineer for the last 25 years in the geothermal energy industry. He performs research for the U.S. Department of Energy and the California Energy Commission, and has published over 25 technical articles. He is an associate editor for the inte... | <urn:uuid:f947437b-66fa-425e-9704-6e03495a076a> | 3.375 | 3,159 | Knowledge Article | Science & Tech. | 35.868582 |
Happy Friday everyone! I don’t know about you, but when it comes down to learning and understanding physics, I get headaches. That’s why we have decided to make things simpler by bring you an exciting episode of learning Physics with Kittens! What you are about to see in this video is a Newton’s cradle. Various kittens... | <urn:uuid:8eeec578-ac70-40ad-8916-c3752914602f> | 3.171875 | 150 | Truncated | Science & Tech. | 61.375 |
With Sunday's surprising tornado in Enumclaw, it's a good excuse to write a tornado-themed blog entry today.
What's the difference between a funnel cloud and tornado?
A funnel cloud is basically a tornado that doesn't touch the ground. They don't do any damage by itself, but a funnel cloud can certainly become a tornad... | <urn:uuid:73ca41b2-ec55-4a00-b2d2-9acc3730d127> | 3.40625 | 830 | Personal Blog | Science & Tech. | 51.288929 |
Jackson Laboratory - An Introduction
For a detailed description of the lab's research, please see the faculty page.
The Jackson Lab is interested in understanding the biology of the simplest human viruses, the picornaviridae. While they are simple and tiny - even for viruses - they cause an astounding amount and variet... | <urn:uuid:a3763296-1a60-48b3-9b59-7cf64fcd672f> | 3.46875 | 554 | Knowledge Article | Science & Tech. | 36.411067 |
Joined: 16 Mar 2004
|Posted: Thu Dec 14, 2006 12:51 pm Post subject: From Nanowires to Nanotubes
|From Nanowires to Nanotubes
Hollow nanocrystals that can function as highly-efficient catalysers or transport containers for chemical agents are in great demand nowadays. Scientists from the Max Planck Institute of Microst... | <urn:uuid:10e0da59-e9f2-4b65-9ee5-c9c04d8f4d03> | 3.53125 | 678 | Comment Section | Science & Tech. | 26.103292 |
What is Nanotechnology?
Authored by Ottilia Saxl.
Nanotechnology is an exciting area of scientific development which promises ‘more for less’. It offers ways to create smaller, cheaper, lighter and faster devices that can do more and cleverer things, use less raw materials and consume less energy.
There are many exampl... | <urn:uuid:e47ffca2-d6da-48e2-8067-b3c8d3b98c70> | 3.375 | 902 | Knowledge Article | Science & Tech. | 23.706671 |
Distribution Maps of Coma and Regional Spectra in Coma
Results from the Infrared spectrometer in work lead by Lori Feaga of University of Maryland, show asymmetric distributions of both water and carbon dioxide gases in the coma of Tempel 1. The water is enhanced in the sunward direction, where sunlight sublimates wate... | <urn:uuid:a6816077-4f4a-4460-a212-7fb75c041368> | 3.234375 | 201 | Knowledge Article | Science & Tech. | 23.387105 |
SCIENCE / History
Jan 13, 2013 — Dorothy Wrinch was the first woman to ever receive a doctorate in science from Oxford University, and she was the first person to design a protein structure. But her name is largely unknown. I Died for Beauty, a biography of Wrinch by Marjorie Senechal, tells her story.
Jan 1, 2013 — Th... | <urn:uuid:47ebc269-db99-4e00-b47f-bf16c00c6a57> | 2.90625 | 184 | Content Listing | Science & Tech. | 50.18775 |
The killer whale has many breeding habits that are known to researchers that suggest that the killer whale may be more like humans than previously expected. The newborn calves of an orca whale population have been observed by scientists at various times during the year. This suggests that orca whales have no particular... | <urn:uuid:fc9bf2ee-f5d9-4142-bc19-6848bc38b7fc> | 3.421875 | 329 | Knowledge Article | Science & Tech. | 49.15789 |
Climate Change Affects Deep-Sea Life
The cold dark expanses of the ocean floor may provide clues to the extent and effect of climate change on undersea ecosystems, said Ron Kaufmann, associate professor of marine science and environmental studies at the University of San Diego.
Kaufmann was one of the authors of a pape... | <urn:uuid:b8346c01-849e-41c8-9cbe-f45fe43834ef> | 3.046875 | 176 | Truncated | Science & Tech. | 30.004642 |
by Staff Writers
Manchester, UK (SPX) Apr 05, 2012
Since the NASA / ESA Cassini-Huygens spacecraft arrived at Saturn in 2004, astronomers and space scientists have been able to study the ringed planet and its moons in great detail. Now, for the first time, a team of planetary scientists have made simultaneous measureme... | <urn:uuid:cd2ed1e6-ef9e-45f7-8b17-a8f271e2ca71> | 3.375 | 803 | Truncated | Science & Tech. | 31.509562 |
Changing Planet: Rising Sea Level
As the Earth's atmosphere warms due to rising levels of greenhouse gases, our oceans are warming also. The rising temperature of the atmosphere also leads to melting of ice in the cryosphere. Melting water from land-based glaciers and ice sheets eventually makes its way into the ocean,... | <urn:uuid:117db62f-87f1-4602-a65f-e39e43e41923> | 3.828125 | 557 | Tutorial | Science & Tech. | 58.6125 |
Identifying Sources of Excess Nitrogen
Meet EPA Ecologist Jana Compton, Ph.D.
As an ecologist with the Western Ecology Division of EPA’s Office of Research and Development, Dr. Jana Compton investigates the sources and effects of nitrogen pollution. She obtained her undergraduate degree in biology and chemistry at Earl... | <urn:uuid:1e030db3-7821-434e-8d50-8518dcb13522> | 2.703125 | 946 | Audio Transcript | Science & Tech. | 56.061236 |
Aircraft used for collecting air samples over the Gulf of Mexico off the coast of Corpus Christi, Texas (site code TGC). The plane is a Cessna 402.
Since its inception in 1992, the NOAA/ESRL Carbon Cycle Greenhouse Gases (CCGG) group’s aircraft program has been dedicated to collecting air samples in vertical profiles o... | <urn:uuid:a5b2784b-1e3c-4274-b18c-381f37674d2f> | 3.25 | 208 | Knowledge Article | Science & Tech. | 41.509323 |
C++ Structure: Why returns 'sizeof()' a bigger size than the members actually need?
Q: Why returns 'sizeof()' a bigger size than the members actually need?
A: This is due to structure alignment which aligns the data structure by padding extra bytes so as to optimize for data transfer.
Modern CPUs perform best in data t... | <urn:uuid:70fd3dc6-899d-41b6-81cb-785ae46c59b5> | 3.078125 | 409 | Q&A Forum | Software Dev. | 49.36125 |
Here on planet Earth we're used to flames -- whether from a candle or campfire -- reaching upward to the sky with slender limbs hungry for oxygen and driven by rising hot air. But in space, sans our planet's strong gravitational pull, flames are more likely to take the shape of eerie fireballs.
Within the flame of a re... | <urn:uuid:1dfe3ccc-238c-4320-9975-e41930ad8ebc> | 3.6875 | 200 | Truncated | Science & Tech. | 35.423289 |
Fermat's Principle: Light follows the path of least time. The law of reflection can be derived from this principle as follows:
The pathlength L from A to B is
Since the speed is constant, the
minimum time path is simply the minimum distance path. This may be found by setting the derivative
of L with respect to x equal ... | <urn:uuid:321803e9-9399-4e7a-95ae-2b27a7558685> | 3.25 | 105 | Knowledge Article | Science & Tech. | 50.565647 |
Warm-Hot Intergalactic Medium in the Sculptor Wall
Scientists have used ESA's XMM-Newton and NASA's Chandra X-ray Observatory to detect a vast reservoir of gas lying along a wall-shaped structure of galaxies about 400 million light years from Earth. In this artist's impression, a close-up view of the so-called Sculptor... | <urn:uuid:3dfdff7a-e4e8-4d10-b2c5-e79e44b07c68> | 2.71875 | 565 | Knowledge Article | Science & Tech. | 46.117188 |
Basic information about comets with images and links to comet-related sites.
Links to a general discussion of comets and discussions of specific comets; images of comets; a link to an animation of a comet's flight.
Images of comets (including Comet Halley) and of other small space objects, such as asteroids and meteori... | <urn:uuid:240d6e9a-45de-4666-9ad6-f5cd8e759ab2> | 3.03125 | 523 | Content Listing | Science & Tech. | 39.569046 |
The maps displayed in the drought section of the Weekly Rainfall Update are masked rainfall percentages maps. These maps show the percentage of mean rainfall that has been received for specified periods. The time periods of the maps and the grey masking is determined by the most recent Drought Statement.
At the beginni... | <urn:uuid:117e052c-633f-46b8-9e77-2aed214f0b99> | 3.125 | 510 | Knowledge Article | Science & Tech. | 49.793868 |
by Ruth Tenzer Feldman
Joanna Aizenberg, a scientist and one of Earth's most complex multicellular animals, entered a San Francisco store and encountered the elegant remains of Euplectella speciosa—a deep-sea sponge and one of Earth's simplest multicellular animals. Scientist and sponge might one day revolutionize fibe... | <urn:uuid:590f2bd2-5333-42dd-a543-70716b230360> | 3.625 | 659 | Knowledge Article | Science & Tech. | 41.336462 |
The Bison parser stack can run out of memory if too many tokens are shifted and
not reduced. When this happens, the parser function
yyerror and then returns 2.
Because Bison parsers have growing stacks, hitting the upper limit usually results from using a right recursion instead of a left recursion, see Recursive Rules... | <urn:uuid:b62d2f0a-2748-43f7-8686-8a821e2ffb8c> | 2.8125 | 447 | Documentation | Software Dev. | 41.794118 |
Make is a tool which controls the generation of executables and other non-source files of a program from the program's source files.
Make gets its knowledge of how to build your program from a file called the makefile, which lists each of the non-source files and how to compute it from other files. When you write a pro... | <urn:uuid:7d111e3d-b1d9-4b7b-94bb-64325d568682> | 4.3125 | 1,508 | Documentation | Software Dev. | 51.092282 |
In fusion research, where deuterium-tritium is a common fuel mixture, the neutron released when (D + T) combine to form (4He + n) can activate the reactor structure. In this case the 4He is inert, the neutron sticks to another nucleus, and the neutron + nucleus reaction creates an actvation product. Sometimes called ra... | <urn:uuid:26bde061-5797-42a2-8536-70e35a5d5958> | 3.25 | 98 | Knowledge Article | Science & Tech. | 45.062917 |
Some people's talents are so well hidden that you overlook them completely. Sometimes it is the same with cells. According to tradition in neuroscience, brain cells fall into two broad groups - neurons and glial cells. Neurons are the smart, fast-talking communicators that process information in the brain; glial cells ... | <urn:uuid:0dbdc652-2b44-4950-ab3d-4457cb87657d> | 3.265625 | 216 | Truncated | Science & Tech. | 50.516373 |
They are still a long way from returning to the moon, but NASA is already thinking about sending astronauts to an asteroid. Such a mission could be accomplished using the same spacecraft and launch vehicle being designed to take Americans back to the moon.
"This would be the first time that humans go outside of the Ear... | <urn:uuid:a255fd7c-1080-4a6b-a655-169b91302308> | 3.84375 | 202 | Truncated | Science & Tech. | 62.130991 |
Two end member geodynamic settings produce the observed examples of rapid voluminous felsic (rhyolitic) magmatism through time. The first is driven by mantle plume head arrival underneath a continent and has operated in an identifiable and regular manner since at least 2.45 Ga. This style produces high temperature (≤ 1... | <urn:uuid:beecedd4-8069-4352-b97c-dd4cf5c03508> | 2.90625 | 460 | Academic Writing | Science & Tech. | 23.948487 |
This lesson has students consider how various parts of the world and the United States are affected by climate controls such as world air currents. They will read about climate controls and will create maps showing how these controls affect the climate in various places around the country.
6, 7, 8
Biological And Life S... | <urn:uuid:f92e4a12-e3ac-411e-aeea-67122559f983> | 3.203125 | 77 | Content Listing | Science & Tech. | 24.983125 |
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.
January 11, 1998
Explanation: Gravity can bend light. Almost all of the bright objects in this Hubble Space Telescope image are galaxies in the clus... | <urn:uuid:31c0df99-a241-4176-b496-e679d325e7f4> | 3.375 | 186 | Knowledge Article | Science & Tech. | 49.875244 |
Hosted by The Math Forum
Problem of the Week 1059
Snakes on a Plane
MacPoW Home ||
Forum PoWs ||
Teachers' Place ||
Student Center ||
Each of the eight rectangles in the diagram below represents a house, the door being marked by an attached semicircle. Each disk represents a gate on the boundary of the region. Each dot... | <urn:uuid:3853afe1-c3d8-406b-ad43-15f04d391876> | 3 | 356 | Tutorial | Science & Tech. | 59.465578 |
what exactly does it mean for integers to be unique? if i am supposed to prove that there exists UNIQUE positive m and n integers under a condition, can m and n be equal at some conditions? for them to be unique, does it just mean there is only one m and only one n each time the condition is met? as in if xsqrd= m, the... | <urn:uuid:6fd03dfa-a974-4d61-8755-5d7b3eb8b479> | 2.921875 | 231 | Q&A Forum | Science & Tech. | 72.112084 |
And now for something completely different… or is it?
This problem comes from the ancient Greeks (Euclid, to be exact). Suppose you have a rectangle which is one unit tall and has this special property: if you cut off a square piece from the end of the rectangle, you’re left with a smaller rectangle that has the same p... | <urn:uuid:63073242-f0cf-4bda-872d-6618e40b1b3f> | 2.734375 | 177 | Personal Blog | Science & Tech. | 62.14764 |
Sean Sheldrake - May 8, 2013
Daniel Botkin - May 2, 2013
Emily Frost - Apr 23, 2013
Throughout the site, check out
‘For Educators’ on the left side of the page. There you will find lesson plans, activities, and resources related to the page topic.
Browse all Educator materials by clicking here:
West Indian Manatees, Tr... | <urn:uuid:693c6104-5555-49d5-9774-aeb187c2b34c> | 3.796875 | 181 | Content Listing | Science & Tech. | 30.9 |
Number 63, January 17, 1992 by Phillip F. Schewe and Ben Stein|
GAMMA RAY ASTROPHYSICS IS VIOLENT . In one single-week interval, for example, quasar 3C279 emitted about 1054 ergs of energy in gamma rays, roughly the same energy you would get if all the particles in our Sun were to be annihilated into radiation. Althoug... | <urn:uuid:11664dce-097d-472a-b371-3666793b3f30> | 3.71875 | 711 | Content Listing | Science & Tech. | 42.817842 |
Simply begin typing or use the editing tools above to add to this article.
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polarization of liquids
...of the atomic nuclei within the molecules. This generally small effect is observed at radio frequencies but not at opti... | <urn:uuid:ad092957-e47e-4836-aa5e-766fd4ad03fd> | 3.078125 | 136 | Knowledge Article | Science & Tech. | 37.050417 |
It's interesting to note, also, that the manner in which you refer to windows changes depending on where you are when you do the referring. In order to close the current window, for example, you can always use the following:
However, you can also affect other windows, simply by replacing the generic name "window" with ... | <urn:uuid:193bd32d-1433-4701-aa24-a9519c064be2> | 3.015625 | 388 | Documentation | Software Dev. | 53.687547 |
When a quantity can only take on integer multiples of some base value, those units are called quanta (sg. quantum), from the Latin for quantity. An important discovery of modern physics is that most if not all fields are quantized, hence the field of quantum physics.
In physics, quantization refers to the formulation o... | <urn:uuid:5c9d58cb-005f-4771-bb91-84bf38c1db5b> | 3.46875 | 182 | Knowledge Article | Science & Tech. | 37.273684 |
To demonstrate the independence of vertical and horizontal motion.
Monkey gun (barrel with electromagnet)
"bullets" or "darts" (cylindrical Al plugs)
"Monkey" (bull's eye lid)
DC power supply
laser for sighting
2 table clamps
Mount Monkey Gun to table (Mara) or chalk tray (M208) using 2 clamps. Using two clamps greatly... | <urn:uuid:39052a7f-5f10-46f2-9ff8-eb0e5708a7dc> | 3.3125 | 390 | Tutorial | Science & Tech. | 72.263982 |
The generation of indexes depends on the markups inserted in the text.
Such markups will be processed afterwards by an external tool and will generate the index. An example of such a tool is the collateindex.pl script (see Section B.6.2). Details about the process used to generate these indexes are shown in Section B.6... | <urn:uuid:0277dfed-b3d7-4765-a396-588280cb97a4> | 3.203125 | 451 | Documentation | Software Dev. | 38.548208 |
The scientific study of organisms living in or near water. This term is to be used for the science of 'aquatic biology' and for biological studies in fresh and brackish water. For marine biological studies, use 'marine biology'.
Website of the Gulf of Mexico Integrated Science program to understand the framework and pr... | <urn:uuid:6a1703b6-0c02-4878-9f2e-5075096f84f7> | 2.890625 | 445 | Content Listing | Science & Tech. | 23.693722 |
Isn't this bat cute!
Click on image for full size
Courtesy of Corel Photography
Tropical Rain Forest Mammals
Birds aren't the only creatures that fly through the rain forests! Several species of flying mammals live in the jungle. From the harmless fruit bat to the flying squirrel, the tropical rain forests are full of ... | <urn:uuid:f9a55392-611c-42d5-85dd-ea26e2b91222> | 3.25 | 571 | Content Listing | Science & Tech. | 65.897962 |
The Solar Wind
Space isn't empty, especially not in the Solar System, it is filled with a stream of particles given off by the sun called the Solar Wind. Well, when I say "not empty", I mean "almost not empty" . If you take an imaginary cube of space, one centimeter on all sides, it will be filled with about 10 particl... | <urn:uuid:9f33ec93-6159-4d46-a293-67f9fa0dfc81> | 3.3125 | 294 | Personal Blog | Science & Tech. | 61.925333 |
The formation of planets in the process of star formation appears now to be commonplace. Ward and Brownlee in their book Rare Earth make the point that the formation of a planet like Earth that can support advanced life may be exceedingly rare. The search for and characterization of extrasolar planets is currently a ve... | <urn:uuid:eec774f3-8838-468e-8895-a69eee7f0864> | 3.140625 | 211 | Knowledge Article | Science & Tech. | 62.271045 |
There are few animals in the world that grab the imagination and sense of awe than does the jellyfish. One of the most mysterious of sea animals, the jellyfish by its name and its body has an almost primordial effect on the human
psyche.The almost alien looking animals are still largely a mystery to science and still g... | <urn:uuid:0cea93ab-f88f-44c2-a208-ac1b7b2e78ff> | 3.453125 | 431 | Personal Blog | Science & Tech. | 30.719121 |
Small island developing states are viewed as the early-warning canary for global environmental change. But though they share global problems, many have an eye for economic growth and have become industrialised nations facing their own suite of home-grown problems.
Do these islands still have the pristine environments t... | <urn:uuid:b03e4e9e-1593-48df-82bb-095f1b106ca6> | 3.03125 | 939 | Nonfiction Writing | Science & Tech. | 22.249864 |
4 days till exams and counting down - nerves shattered already!
A closed cuboid with rectangular base of width xcm. Length of base is twice the width and the volumn is 1944cm^3. The surface area of the cuboid is S cm^2.
a) Show that S = 4x^2 + 5832x^-1.
b) Given that x can vary, find the value of x that makes the surfa... | <urn:uuid:9b88d6a9-84c6-4114-bf86-74e0bacfd04d> | 2.78125 | 132 | Q&A Forum | Science & Tech. | 92.894 |
While writing a unit on magnets, I was asked, well you
need to define magnetism and establish general understanding. The
facts are easy to list but what is magnetism? I wrote that it was a
form of energy that has specific properties and characteristics.
Well how accurate am I? Is it a form of energy or just a "force".
... | <urn:uuid:f44a42a0-544f-42b5-8727-d83d66072d17> | 3.4375 | 1,691 | Q&A Forum | Science & Tech. | 54.314048 |
Sean Sheldrake - May 8, 2013
Daniel Botkin - May 2, 2013
Emily Frost - Apr 23, 2013
Throughout the site, check out
‘For Educators’ on the left side of the page. There you will find lesson plans, activities, and resources related to the page topic.
Browse all Educator materials by clicking here:
The lettuce sea slug (El... | <urn:uuid:0cc64561-30dd-433b-8096-2ea3325f5db4> | 3.640625 | 210 | Content Listing | Science & Tech. | 56.033796 |
ESO Astronomical Glossary - M
A macrolens is a type of gravitational lens where the lensing object is very massive, such as a . Macrolenses result in image warps, or even multiple images, of faint distant sources, that are strong enough to detect on images. Stuudies of such lensing effects can give information on the d... | <urn:uuid:65723403-38e6-47e9-9dbc-aca4dac2d61c> | 3.4375 | 1,001 | Structured Data | Science & Tech. | 46.784395 |
Phobos, the larger moon of Mars, has a surface covered in craters, dust, boulders – and a great many semi-parallel and intersecting grooves. One theory for the grooves’ origin, proposed in 2011, holds that they are impact scars from chains of debris thrown into space by big meteorite impacts on Mars itself.
Writing in ... | <urn:uuid:ca210657-9894-48aa-a700-e7d5011b2456> | 4.59375 | 608 | Academic Writing | Science & Tech. | 40.492719 |
After a fun-filled summer at camp in Maine, Amy is back in school. She's ready to take over the science lab once again and perform some quite amazing experiments. She specializes in discrepant events. Watch and try to predict what will happen. Expect to be quite amazed.
This month, Amy tests the strength of ordinary ne... | <urn:uuid:1fd8d2ff-8731-47c5-aab8-7601af0b8e72> | 3.46875 | 398 | Tutorial | Science & Tech. | 71.91103 |
Play now 18 mins
Finding the Higgs boson on July 4th 2012 was the last piece in physicists' Standard model of matter. But Tracey Logan discovers there's much more for them to find out at the Large Hadron Collider. To start with there is a lot of work to establish what kind of Higgs boson it is.
Tracey visits CERN and a... | <urn:uuid:5aaa44d3-845f-4e71-8290-794202a7ae77> | 3.515625 | 288 | Truncated | Science & Tech. | 62.595099 |
The Lunar Late Heavy Bombardment
- The small craters can be saturated on the oldest surfaces,
but probably not the basins.
- There are more than 40 basins (D>300km) on the Moon.
- They are all older then ~3.8Gyr (Wilhelms 1987).
- The only good ages we have are for the two youngest:
......Imbrium (3.85Ga) and Orientale... | <urn:uuid:d8446f20-6c3f-4237-aa76-82b3b6f11438> | 3.546875 | 278 | Academic Writing | Science & Tech. | 78.701404 |