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Dr. Steven Amstrup has been studying polar bears and their habitat since 1980, and much of what we know about them, and even how scientists study them, comes from his work. For instance, he was the first person to apply radio telemetry to the study of polar bears, which allowed scientists to understand the immense dist... | <urn:uuid:792f83ba-8178-4d75-8b18-62497abcf84a> | 2.984375 | 355 | About (Pers.) | Science & Tech. | 39.551258 | 4,300 |
The format of a symbolic mode is [ugoa...][[+-=][perms...]...], where perms is either zero or more letters from the set rwxXst, or a single letter from the set ugo. Multiple symbolic modes can be given, separated by commas.
A combination of the letters ugoa controls which users’ access to the file will be changed: the ... | <urn:uuid:fcf44a7b-37f3-4b60-81cd-bc2f86de2f92> | 3.03125 | 740 | Documentation | Software Dev. | 60.248798 | 4,301 |
“It remains unclear if such losses will decline or will level off or will accelerate further," says Ian Joughin, a glaciologist at the University of Washington in Seattle. "The melting needs monitoring to further understand the ice sheet processes leading to the change.”
The findings show that two thirds of the annual ... | <urn:uuid:8a248f80-b5ad-406c-902e-a32e50810d89> | 4.03125 | 315 | News Article | Science & Tech. | 41.111619 | 4,302 |
Search Course Communities:
Hypergeometric Distribution - Introduction
Course Topic(s): Probability | Discrete Distributions, hypergeometric
This is a basic overview of the hypergeometric distribution with descriptions of expectation, variance, covariance, skewness, kurtosis, and hypergeometric function. It also has a s... | <urn:uuid:997ec752-59e7-49aa-99a0-dc9d5e048916> | 3.21875 | 166 | Truncated | Science & Tech. | 13.74075 | 4,303 |
Table of Contents
Introduction to Websockets¶
The WebSocket specification is a new feature of HTML5. It defines a full-duplex single socket connection over which messages can be sent bi-directionally between client and server. The WebSocket standard simplifies much of the complexity around bi-directional web communicat... | <urn:uuid:4b1994a8-7fed-4b75-be9f-41f18a6ac38f> | 2.859375 | 551 | Documentation | Software Dev. | 44.366883 | 4,304 |
If a is the radius of the axle, b the radius of each ball-bearing, and c the radius of the hub, why does the number of ball bearings n determine the ratio c/a? Find a formula for c/a in terms of n.
Which is larger cos(sin x) or sin(cos x) ? Does this depend on x ?
Find the exact values of some trig. ratios from this re... | <urn:uuid:33e31ba8-be09-4f75-a5a1-3a49a8e0c1eb> | 3.046875 | 104 | Q&A Forum | Science & Tech. | 88.760894 | 4,305 |
Oh Titan, you ARE the most interesting moon out there, aren't you??
If only we could convince Saturn to let us have a better look!
Just a few weeks ago we were talking about the tropical oasis found on Titan, and now we're hearing something even more exciting: below those methane lakes and pools is an ocean… of normal ... | <urn:uuid:5948472e-d79c-4880-8832-8a3bc6c5e222> | 3.375 | 299 | Personal Blog | Science & Tech. | 70.565493 | 4,306 |
Oct 26, 2007, 12:26 PM
Post #1 of 2
perl script help needed
i need to write a perl program which does the following:
it connects to the database and retrieves the rows from a table, which i am able to do.
For example, the table looks like this :
Name PID CID LID
a1 0 0 10
a1 0 0 20
a1 0 1 30
a2 0 2 40
a2 1 1 50
a3 0 1 ... | <urn:uuid:d8ef5a81-0bb2-4178-90c4-c1d093660cde> | 2.515625 | 234 | Comment Section | Software Dev. | 74.985 | 4,307 |
Click on the image for the larger version
This view of Hurricane Alex in the western Gulf of Mexico was acquired by the Multi-angle Imaging SpectroRadiometer (MISR) instrument aboard NASA's Terra satellite just after noon Central Daylight Time on June 30, 2010. Around this time NOAA's National Hurricane Center reported... | <urn:uuid:fe60de3d-6fc2-42ea-aa30-53eb7b90e3cd> | 2.9375 | 462 | Knowledge Article | Science & Tech. | 53.174495 | 4,308 |
Want to help unravel the mysteries of the universe" A new distributed computing project designed by a University of Illinois researcher allows people around the world to participate in cutting-edge cosmology research by donating their unused computing cycles.
The project is called Cosmology@Home, and is similar to SETI... | <urn:uuid:d6546ad7-411d-4987-b72d-9c3d94043a05> | 3.65625 | 306 | News Article | Science & Tech. | 6.914372 | 4,309 |
Last July, a chartered fishing boat strewed 100 tonnes of iron sulphate into the ocean, off the western coast of Canada. The goal was to supercharge the marine ecosystem. The iron was supposed to fertilize plankton, boost salmon population and sequester carbon. Currently, it’s still unclear whether the ocean responded ... | <urn:uuid:17da8785-9909-4085-9965-f6a672e596cf> | 2.921875 | 98 | Truncated | Science & Tech. | 27.223579 | 4,310 |
A controversial claim has been put forth by a researcher at the University of Oregon that could shake some limbs on the tree of life. Researcher Gregory Retallack argues that ancient multicellular fossils previously thought to be ancestors of early marine life are vestiges of land-dwelling lichen or other microbial col... | <urn:uuid:7758892a-0cb2-459f-9230-9f3a0a711910> | 3.53125 | 163 | News Article | Science & Tech. | 32.793571 | 4,311 |
Cornell Creative Machines Lab
Nick Cheney at Cornell has developed a way for robots to evolve within days.
By Marshall Honorof
NEW YORK — Robots are simply more efficient than humans at certain tasks. They already excel at building cars, exploring distant planets and hunting for explosives, but it turns out that robots... | <urn:uuid:e0bfaaa4-c791-44dd-8f9b-bea6275ec062> | 4.09375 | 834 | News Article | Science & Tech. | 37.654417 | 4,312 |
The steam plume from a lava flow moving down the slopes of Eyjafjallajökull on May 2, 2010.
A quick note on the activity at Eyjafjallajökull in Iceland: The ash from the ongoing eruption has caused a partial closure of airspace over Ireland from 0600 to 1200 on Tuesday May 4. This is one of the first closures of Europe... | <urn:uuid:56a5be5d-ce47-4e2e-8b82-987ca65437df> | 2.875 | 566 | Personal Blog | Science & Tech. | 62.534683 | 4,313 |
I was lucky enough to see a talk by Barbara Liskov, the grande dame of computer science. The talk was titled “The Power of Abstraction,” and it covered Liskov’s work on programming languages in the 1970s and 1980s, primarily a language called CLU.
Update 1/14/2010: Video of the same talk is available here: OOPSLA Keyno... | <urn:uuid:239fa43c-d99b-4c93-848a-d8e1bfeecb8e> | 2.71875 | 688 | Personal Blog | Software Dev. | 42.25416 | 4,314 |
Near the center of this sharp cosmic portrait, at
the heart of the Orion Nebula,
are four hot, massive stars
Gathered within a region about 1.5 light-years in radius,
they dominate the core of the dense Orion Nebula Star Cluster.
Ultraviolet ionizing radiation from the Trapezium stars,
mostly from the brightest star
po... | <urn:uuid:9149c5b7-e4f8-4692-93ed-4972a87a7f32> | 3.8125 | 201 | Knowledge Article | Science & Tech. | 38.784688 | 4,315 |
The goal of theoretical elementary particle physics is to understand the most fundamental laws which govern our universe, and to understand the structure and nature of the universe at the deepest level. Theorists at Baylor are approaching these questions from a variety of perspectives.
Standard Model Phenomenology
The ... | <urn:uuid:8194019a-0c59-446d-85da-e997a092011e> | 2.953125 | 689 | About (Org.) | Science & Tech. | 32.919669 | 4,316 |
The topic of this article is focused around zooming in a perspective OpenGL view. I wrote this article because I found some examples of zooming in a OpenGL view using ortho projections. But the most advanced example that I found using perspective projections, don't implement a true zooming but simulate the zooming effe... | <urn:uuid:1ea7819c-5d4f-48ac-9bfe-9b160391ee2b> | 2.875 | 228 | Documentation | Software Dev. | 31.823197 | 4,317 |
Below are a series of photos illustrating the types of instruments that were
used, how the instruments were deployed, and the nature of the activities
at the "LARSE headquarters" in a Glendora Warehouse.
Principal Investigator Gary Fuis (U.S. Geological Survey, Menlo Park) explains the LARSE to volunteers from local co... | <urn:uuid:10f944a0-9ed9-49a1-aa17-2e2d94cff0c9> | 2.90625 | 678 | About (Org.) | Science & Tech. | 41.173333 | 4,318 |
Holly and ivy, although festive reminders of winter holidays, are aggressive invasive plant species taking over habitats here in the United States.
The Ents: they’re walking, talking trees, and they are a figment of Tolkien’s imagination, right? Not quite. Tree species around the world can cooperate via their fungal fr... | <urn:uuid:86e4cc6e-c251-4c77-bc11-27b5a8a52749> | 2.59375 | 251 | Content Listing | Science & Tech. | 44.988857 | 4,319 |
Have some satellite data showing 2010 to be -- by a significant margin -- the hottest year in the satellite record. Just look at the very top line for 2010, with the rectangle at the end showing the most recent reading.
You will want to check all the boxes at the bottom of the graph and then select "redraw" to show the... | <urn:uuid:c4a9a6fa-a88a-44af-9b8b-136dd9a03745> | 3.328125 | 1,763 | Comment Section | Science & Tech. | 50.951932 | 4,320 |
This article has been reviewed by the following Topic Editor: C Michael Hogan
Atlantic Water (AW) is a water mass traditionally defined as any water with salinity greater than 35.0 entering the Arctic domain from the Atlantic domain.
This article is written at a definitional level only. Authors wishing to expand this e... | <urn:uuid:61d2478c-fda2-489a-b207-9d908b1db994> | 3.265625 | 412 | Knowledge Article | Science & Tech. | 50.093026 | 4,321 |
Footprint for Nations
In today’s world, where humanity is already exceeding planetary limits, ecological assets are becoming more critical. Each country has its own ecological risk profile: Many are running ecological deficits, with Footprints larger than their own biological capacity. Others depend heavily on resource... | <urn:uuid:79233e7f-cc90-47f6-b927-04f185cd7922> | 3.671875 | 331 | Knowledge Article | Science & Tech. | 12.954545 | 4,322 |
The Karner Blue Butterfly
Lycaedes melissa samuelis
Walk into one of nature’s unique ecosystems in the Northeast, a pine barren, on a still, hot July day. You'll smell the aroma of pine. You'll sense the dryness of the air, and if you are fortunate, you'll see the fluttering of small iridescent blue wings against a bac... | <urn:uuid:a62df826-9174-401f-a00f-311009dea1fc> | 3.71875 | 970 | Knowledge Article | Science & Tech. | 42.687299 | 4,323 |
Researchers in the department of nanostructures and nanochemistry at the Genoa-based Istituto Italiano di Tecnologia (IIT) report that they have imaged the DNA double helix for the first time through an electron microscope. Working with colleagues at the University of Magna Grecia in Catanzaro, the team says it develop... | <urn:uuid:d0be6be7-8549-4238-98ab-90f830031e4a> | 3.53125 | 535 | News Article | Science & Tech. | 17.167328 | 4,324 |
2003: Fiftieth Anniversary of Watson and Crick's Description of the Double Helix
In April 1953, a paper appeared in the journal Nature that proposed a double helix structure for deoxyribose nucleic acid DNA. Determining the molecular structure of the gene was one of the most significant achievements in all of science. ... | <urn:uuid:f6324a92-1b54-4d08-badf-07252a2455f1> | 3.671875 | 370 | Knowledge Article | Science & Tech. | 60.893283 | 4,325 |
Connect to share and comment
Following is a summary of current science news briefs.
Mini planet found far beyond Earth's solar system
CAPE CANAVERAL, Florida (Reuters) - - Astronomers have found a mini planet beyond our solar system that is the smallest of more than 800 extra-solar planets discovered, scientists said o... | <urn:uuid:53c8aa03-5d6c-4ded-9c50-4d431bc4fcc6> | 2.875 | 287 | Content Listing | Science & Tech. | 42.161642 | 4,326 |
This section describes functions for “reading” integer and
floating-point numbers from a string. It may be more convenient in some
cases to use
sscanf or one of the related functions; see
Formatted Input. But often you can make a program more robust by
finding the tokens in the string by hand, then converting the numbe... | <urn:uuid:da68526a-b1fd-4171-a507-ed9ed9605faa> | 2.984375 | 79 | Documentation | Software Dev. | 53.520791 | 4,327 |
Goldberg says, “They (art and engineering) build around each other in a constructive way. You have these two phases that you go back and forth between and they challenge each other in interesting ways.”
Take for example the Telegarden: created back in the mid-1990s when the internet started to flourish, it was a roboti... | <urn:uuid:24e654ca-d67e-46d8-b32c-229a543d6171> | 3.03125 | 1,090 | Audio Transcript | Science & Tech. | 37.07116 | 4,328 |
Faster-than-light communication AUG 18 2008
On the basis of their measurements, the team concluded that if the photons had communicated, they must have done so at least 100,000 times faster than the speed of light -- something nearly all physicists thought would be impossible. In other words, these photons cannot know ... | <urn:uuid:60335297-1f88-4df1-920c-919cb3554f28> | 3.6875 | 104 | Personal Blog | Science & Tech. | 49.555714 | 4,329 |
Unit 1: Many Planets, One Earth // Section 10: Further Reading
University of California Museum of Paleontology, Web Geological Time Machine, http://www.ucmp.berkeley.edu/help/timeform.html. An era-by-era guide through geologic time using stratigraphic and fossil records.
Science Education Resource Center, Carleton Coll... | <urn:uuid:ffc30444-14b5-4c80-ba05-0f9b595091e8> | 3 | 208 | Content Listing | Science & Tech. | 32.54 | 4,330 |
] The Earth has become significantly greener over the past
] two decades, the result of climate changes that have
] furnished plants with more heat, light, water and carbon
] dioxide, according to a new Science magazine report.
] The overall plant bulk went up about 6 percent over much
] of the planet, with spikes in t... | <urn:uuid:a02b1349-4f69-4205-893e-124c0b50675c> | 2.984375 | 124 | Personal Blog | Science & Tech. | 45.8175 | 4,331 |
MyPhysicsLab – Physics Simulation with Java
Click on one of the physics simulations below... you'll see them animating
in real time, and be able to interact
with them by dragging objects or changing parameters like gravity. Get Java software
if you don't already have it.
The next set of simulations are non-interactive ... | <urn:uuid:7ee66b09-4db7-4b9c-b5fd-d331fd30f164> | 2.671875 | 1,180 | About (Org.) | Science & Tech. | 42.191281 | 4,332 |
> Larger images and animation available from NASA's Earth Observatory
Crack in the Petermann Glacier
Jesse Allen, using data provided courtesy of NASA/GSFC/METI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team
Michon Scott, NASA's Earth Observatory
Covering some 1,295 square kilometers (500 square miles) along the north... | <urn:uuid:1a2f180a-5d01-4723-928f-fb22ffa9afc0> | 4.125 | 482 | Knowledge Article | Science & Tech. | 41.923432 | 4,333 |
Putting Together the Arctic Puzzle
The Arctic is arguably one of the most perplexing places on Earth – so puzzling that an entire campaign has been dedicated to learning more about it. Nicola Blake, an associate researcher from the University of California, Irvine, is working on NASA's Arctic Research of the Compositio... | <urn:uuid:f524053d-fe4c-48c6-9dfc-7d8fd038c7b0> | 3.828125 | 608 | Nonfiction Writing | Science & Tech. | 37.966941 | 4,334 |
A NEW form of liquid crystal which behaves like rubber could one day be used to make components and to manipulate light in a new generation of optoelectronic circuits, which use light instead of electricity to communicate. At a conference held by the American Physical Society in St Louis last week, a West German resear... | <urn:uuid:3c22b700-1195-481b-95f8-564cdc1500c7> | 3.828125 | 210 | Truncated | Science & Tech. | 30.332941 | 4,335 |
Bring up a chimpanzee from birth as if it were a human and it will learn many unsimian behaviours, like wearing clothes and even eating with a knife and fork. But one thing it will not do is talk.
In fact, it would be physically impossible for a chimp to talk just like us, thanks to differences in our voice boxes and n... | <urn:uuid:99341bbc-2370-44f7-aea9-f6f066a3c699> | 3.53125 | 205 | Truncated | Science & Tech. | 49.816872 | 4,336 |
You might remember the heroic role that newly-invented radar played in the Second World War. People hailed it then as "Our Miracle Ally". But even in its earliest years, as it was helping win the war, radar proved to be more than an expert enemy locator. Radar technicians, doodling away in their idle moments, found tha... | <urn:uuid:a7498f64-8121-45e6-ae8c-3a986e5ebaf1> | 3.53125 | 1,380 | Nonfiction Writing | Science & Tech. | 43.569483 | 4,337 |
- About us
- Laboratory Aims
- Laboratory Facilities
- Research Vessel
- Marine Geophysical Surveying
- Oceanographic & Environmental Instrumentation
- Laboratory Equipment
- Sediment Sampling Devices
- Remote Operated Vehicle
- Research Activities
There are three main reasons:
1.To take the opportunity experiencing so... | <urn:uuid:865a485d-0988-4866-945e-464baa288774> | 3.4375 | 524 | About (Org.) | Science & Tech. | 53.943649 | 4,338 |
The first scientist to alert Americans to the prospect that human-caused climate change and global warming was already upon us was NASA climatologist James Hansen. In a sweltering Senate hall during the hot, dry summer of 1988, Hansen announced that "it is time to stop waffling ... The evidence is pretty strong that th... | <urn:uuid:e2b8aaa2-85ec-4e2a-9151-d7e851069ed4> | 2.921875 | 997 | Nonfiction Writing | Science & Tech. | 44.033244 | 4,339 |
Overfishing made the grey nurse shark endangered, but it's the animal's bizarre, cannibalistic embryos that are making it difficult for the species to rebound. The gestating shark pups need a "time out," says Nick Otway, a fisheries biologist at Port Stephens Fisheries Institute in Australia. As a last-ditch effort to ... | <urn:uuid:4e7bf975-bd8e-4a09-bc5c-07c38a454e59> | 2.96875 | 530 | News Article | Science & Tech. | 50.66651 | 4,340 |
Complex Neuronal Communication Behind Jump Execution
When danger looms, locusts on the ground leap and fly away. The timing and precision of that leap starts with the complex coding of visual information within a single neuron.
In the current edition of the journal Neuron, researchers at Baylor College of Medicine and ... | <urn:uuid:52af35b6-6de1-4930-adf4-57cfc7a3240f> | 3.390625 | 684 | News Article | Science & Tech. | 39.897564 | 4,341 |
Now I don't have to delete all those important ^#$#*&# PMs ... yet...
Thank you Magister!!!
Helium II is a superfluid, a quantum mechanical state of matter with strange properties .
The thermal conductivity of helium II is greater than that of any other known substance, a million times that of helium I and hundred of t... | <urn:uuid:5b1809c0-0e3b-406b-9cc0-e20dc53d2fe3> | 2.84375 | 229 | Comment Section | Science & Tech. | 54.607778 | 4,342 |
The fact that female wasp spiders have numerous sexual contacts is something which their male partners cannot prevent. What they can do, however, is ensure that no offspring ensue from these tête à têtes with their rivals: the male spiders simply place a chastity belt on their partner while copulating. The tip of their... | <urn:uuid:95db215c-9b0f-43fa-8c83-364c115df4ad> | 2.6875 | 956 | News Article | Science & Tech. | 43.510303 | 4,343 |
Mar. 27, 2001 University Park, Pa. -- Small amounts of well-dispersed natural clay can lead to environmentally friendly and inexpensive plastic composites with improved specialized properties, according to a Penn State researcher.
"Adding very small amounts of natural clays to plastics changes some of their physical pr... | <urn:uuid:002862ba-4188-4ffc-a094-7ea5063ed78c> | 3.453125 | 824 | News Article | Science & Tech. | 30.545895 | 4,344 |
Mar. 12, 2010 Amphibians may be a love 'em and leave 'em class, but one frog species defies the norm, scientists have found.
A trio of biologists, including two from East Carolina University, have discovered in Peru the first confirmed species of monogamous amphibian, Ranitomeya imitator, better known as the mimic pois... | <urn:uuid:dca20beb-56ad-4427-b3b5-949b35c24410> | 3.46875 | 915 | News Article | Science & Tech. | 34.290163 | 4,345 |
The 50 Most Extreme Places in Our Solar System
by David Baker and Todd Ratcliff.
Harvard University Press, 2010
From icy volcanoes on Neptune to Eiffel Tower–size lightning bolts on Saturn, the wildest sights in our corner of the universe.
Proofiness: The Dark Arts of Mathematical Deception
by Charles Seife. Viking, 20... | <urn:uuid:176a3878-d9f7-47b9-98a7-a65a8d876066> | 2.59375 | 800 | Content Listing | Science & Tech. | 58.16627 | 4,346 |
Simulations of standard candles will help astrophysicists understand dark energy
Understanding a Type Ia supernova—an exploding white dwarf star—requires supercomputers. A team of astrophysicists and computational scientists is using the power of Oak Ridge National Laboratory’s (ORNL’s) Jaguar to virtually blow up thes... | <urn:uuid:0e5a776c-f426-47d8-bcee-6584e40dc46c> | 3.5 | 1,998 | News Article | Science & Tech. | 39.282616 | 4,347 |
Artificial leaf produces electricity through photosynthesis
A synthetic leaf has been created that mimics the photosynthesis process, converting sunlight and water into a source of electrical energy.
Developed by a research team at MIT led by Dr Daniel Nocera, the leaf could be a significant step towards green energy b... | <urn:uuid:832da868-7a25-42e4-8f47-5256487c9ae1> | 3.9375 | 288 | News Article | Science & Tech. | 35.902452 | 4,348 |
Comparison of Diagramming Methods
When it comes to recording the results of a system analysis, there are so many diagramming tools and methods available that it can be difficult deciding which one to use. This paper compares the various graphical diagrams used in system analysis, focusing on those documentation models ... | <urn:uuid:bc891a82-55b0-43cc-8067-54aefc14a366> | 2.59375 | 2,735 | Academic Writing | Software Dev. | 27.855066 | 4,349 |
Sometimes Earth's magnetic poles switch places. That is called a magnetic reversal. These graphs show how often magnetic reversals happen. Black stripes show times when Earth's magnetic field was "normal" (like it is today). White stripes show times when the field was reversed. The graph on the left shows the past 160 ... | <urn:uuid:7e043e91-1f0c-4ba5-9240-6c52cb23f0c4> | 3.421875 | 91 | Knowledge Article | Science & Tech. | 74.745132 | 4,350 |
The locations of all 2704 Gamma Ray Bursts detected by BATSE in the 9 year mission.
Click on image for full size
NASA, Compton Gamma Ray Observatory, BATSE Team
Gamma Ray Bursts - The Most Powerful Objects in the Universe?
In the 1960's, the United States launched a series of satellites
to look for very high energy pho... | <urn:uuid:bfa6b9e4-6b3b-49b7-8d1d-76cec83ff6de> | 4.0625 | 764 | Content Listing | Science & Tech. | 56.290824 | 4,351 |
int dlclose (void *handle);__
dlopen loads a dynamic library from the file named by the null terminated string filename and returns an opaque filename is not an absolute path (i.e., it does not begin with a ''
A colon-separated list of directories in the user's LD_LIBRARY_PATH environment variable.
The list of librarie... | <urn:uuid:49b2f036-7f2b-47fd-8367-a3ce5b9a1d65> | 2.59375 | 534 | Documentation | Software Dev. | 46.082653 | 4,352 |
The types of chemical reactions we typically learn in school take place on a Cecil B. deMille, cast-of-thousands scale. They involve huge numbers of atoms or molecules, making it extremely difficult to study exactly what is happening on the quantum level between the individual players. Many of them won't even take plac... | <urn:uuid:f4ea2c81-d28b-4d4b-a8d7-f437f06c3e10> | 3.703125 | 991 | News Article | Science & Tech. | 34.588193 | 4,353 |
Silicon–oxygen and aluminum–oxygen compounds exhibit significant XPS Auger and photoelectron chemical shifts that are accurately measurable. Chemical state plots of KLL Auger kinetic energy versus 2p photoelectron energy permit identification of chemical species from the locations of their points on the plots. The KLL ... | <urn:uuid:cb0f144c-d68f-4b2b-bb1c-639376647b8b> | 3.140625 | 488 | Academic Writing | Science & Tech. | 23.448316 | 4,354 |
November 28, 2008 4 Comments
The enormous, cosmopolitan genus Agrilus (family Buprestidae – commonly called jewel beetles or metallic woodboring beetles) contains nearly 4,000 described species (Bellamy 2008). With many more still awaiting description, it is perhaps the largest genus in the entire animal kingdom (Bella... | <urn:uuid:cc3b0603-12d7-42f1-b23c-a479b0b04e0d> | 3.453125 | 1,411 | Personal Blog | Science & Tech. | 42.42903 | 4,355 |
Blue Ocean Research & Conservation
Discovering the Ocean
Our scientific research has focused recently on an often overlooked yet ecologically important part of many ecosystems–sponges. Numbering over 8000 species, they are common to many aquatic habitats from the Ross Shelf in Antarctica, Lake Baikal in Russia, rocky r... | <urn:uuid:eeb90433-e247-4f67-89ff-aa11c0db8add> | 3.703125 | 525 | About (Org.) | Science & Tech. | 26.826934 | 4,356 |
The kinetic energy of an object is the extra energy which it possesses due to its motion. In Physics and other Sciences energy (from the Greek grc ἐνέργεια - Energeia, "activity operation" from grc ἐνεργός It is defined as the work needed to accelerate a body of a given mass from rest to its current velocity. In Physic... | <urn:uuid:ad5d283d-69f4-4ab7-9887-fc5ffa27370b> | 3.234375 | 4,085 | Knowledge Article | Science & Tech. | 26.340945 | 4,357 |
How NASA takes the Earth’s Temperature
December 29, 2010
Short NASA video examines how the agency derives one of the most utilized temperature data sets – the GISS (Goddard Institute for Space Studies) temperature record.
GISS is one of several widely referenced data sets. The other main ones are HADCRUT, (Hadley Clima... | <urn:uuid:bb8fcc97-41c8-4fd5-9722-1bbe0576e74b> | 2.890625 | 113 | Truncated | Science & Tech. | 15.978139 | 4,358 |
5.9 Reference List Markup
Many sections include a list of references to module documentation
or external documents. These lists are created using the
\seealso environment. This environment defines some
additional macros to support creating reference entries in a
The \seealso environment is typically placed in a section... | <urn:uuid:e7015d0c-506b-4596-81e2-c2e92c48999d> | 2.53125 | 577 | Documentation | Software Dev. | 39.766218 | 4,359 |
Space Science and Engineering Center website by University of Wisconsin-Madison's Graduate School shows a real time animation of the cloud cover over the North America continent. It gets the satellite images and shows animation by stitching those images together. With the help of it you can get an idea of what weather ... | <urn:uuid:8a72b0cd-1d73-4e96-9193-1292e2027ff5> | 3.046875 | 133 | Personal Blog | Science & Tech. | 50.1608 | 4,360 |
Standard gravitational parameter
Small body orbiting a central body
Under standard assumptions in astrodynamics we have:
For all circular orbits around a given central body:
The last equation has a very simple generalization to elliptic orbits:
Two bodies orbiting each other
In the more general case where the bodies ne... | <urn:uuid:6e587ec3-3f85-4b6a-b0bc-2a0624a1d1a4> | 3.515625 | 854 | Knowledge Article | Science & Tech. | 85.548769 | 4,361 |
Posted October 17, 2011 Atlanta
Research News & Publications Office
Contact John Toon
Scientists for the first time have identified and mapped the chemical structure of molecules used by certain species of marine seaweed to kill or inhibit the growth of reef-building coral. Chemicals found on the surfaces of several sp... | <urn:uuid:c0a9b1cd-6c5e-4f97-96cd-bf7063d518c2> | 3.015625 | 1,215 | News (Org.) | Science & Tech. | 30.124808 | 4,362 |
The IRAS Asteroid and Comet Survey is the largest, most uniform
and least biased survey ever conducted of asteroids and comets.
Because the emission observed is thermal, the present survey is not
plagued by the albedo bias to which visible wavelength analogues are
susceptible. Asteroids and comets are bright infrared s... | <urn:uuid:15c8dc73-3a3d-46bf-b908-0a631c767eff> | 2.859375 | 393 | Knowledge Article | Science & Tech. | 27.895568 | 4,363 |
A jet owned by the German Air Research Center, which is equipped with devices and sensors to analyze the ash emitted by the volcano in Eyjafjallajökull glacier in Iceland, arrived in the country yesterday.
“The jet can tell us about the distribution of the ash and it can, to a certain degree, fly into the ash cloud, al... | <urn:uuid:a9c031d3-4730-400b-b4cd-d65af94eebe9> | 2.796875 | 428 | News Article | Science & Tech. | 39.305769 | 4,364 |
There's a distinction to be made between two notions: foliations and distributions.
A distribution is the data, at each point m of M, of a subspace of Tm(M). These subspaces are all of the same dimension (say r), and depend smoothly on the point m, which means that they are generated by r smooth vector fields.
A foliat... | <urn:uuid:a5d7552f-8687-43c5-b114-4787ddf0053d> | 2.578125 | 547 | Q&A Forum | Science & Tech. | 52.759151 | 4,365 |
XSL Transformation is widly known tecnique for converting XML files to XHTML output. XSLT is designed for use as part of XSL, which is a stylesheet language for XML. XSL specifies the styling of an XML document by using XSLT to describe how the document is transformed into another XML document that uses the formatting ... | <urn:uuid:9dd63720-3113-43f3-a282-dd19dde081bf> | 3.15625 | 298 | Documentation | Software Dev. | 42.855491 | 4,366 |
A new supercomputer simulation shows the collision of two neutron stars can naturally produce the magnetic structures thought to power the high-speed particle jets associated with short gamma-ray bursts (GRBs). The study provides the most detailed glimpse of the forces driving some of the universe's most energetic expl... | <urn:uuid:28ec8cac-04c3-4c9e-8940-30d401782c02> | 3.953125 | 1,157 | News Article | Science & Tech. | 44.660392 | 4,367 |
Back to main Impact Risk Page.
Earth Impact Risk Summary
Analysis based on
19 observations spanning 1.1610 days
(2006-Nov-18.29615 to 2006-Nov-19.45711)
Orbit diagram and elements available
These results were computed on Sep 16, 2011
Earth Impact Table
Summary Table Description
The Summary Table includes basic informat... | <urn:uuid:1e361629-41b7-4aa4-b9be-2c4c2e32cb9d> | 2.59375 | 1,002 | Documentation | Science & Tech. | 33.370063 | 4,368 |
Topics covered: Parametric equations, arclength, surface area
Instructor: Prof. David Jerison
Lecture Notes (PDF)
The following content is provided under a Creative Commons license. Your support will help MIT OpenCourseWare continue to offer high quality educational resources for free. To make a donation or to view add... | <urn:uuid:52851cc2-b85b-4d7c-a446-9faa0972f0c4> | 4.03125 | 7,052 | Truncated | Science & Tech. | 86.074111 | 4,369 |
Every object in Ruby has at least one parent class. But most objects typically inherit from multiple classes and mixes in various modules. These classes and modules together forms the inheritance hierarchy of the object. The methods added to an object by a class/module can however be overriden by others which are below... | <urn:uuid:7798f7ab-2f7e-4604-8bb8-20d2217051ec> | 2.65625 | 109 | Tutorial | Software Dev. | 33.318824 | 4,370 |
Cosmic Explosion is New Candidate for Most Distant Object in the Universe
In this video, former Penn State University graduate student Antonino Cucchiara discusses this research at a press conference at the 218th meeting of the American Astronomical Society in Boston, Massachusetts, on 25 May 2011.
- Watch this video o... | <urn:uuid:c43fefe3-75c5-43cc-ad78-e42ae907c7ab> | 2.96875 | 3,275 | News (Org.) | Science & Tech. | 54.259344 | 4,371 |
Mission Type: Lander, Orbiter
Launch Vehicle: Proton booster plus upper stage and escape stages; 8K82K + Blok D (Proton-K no. 255-01)
Launch Site: Tyuratam (Baikonur Cosmodrome), USSR; NIIP-5 / launch site 81P
Spacecraft Mass: Orbiter/bus and descent module: about 4650 kg at launch (orbiter/bus: 3440 kg, descent module... | <urn:uuid:d24666e5-cf4e-4c2a-a7ed-3e39b607f34f> | 3.15625 | 1,027 | Knowledge Article | Science & Tech. | 50.848701 | 4,372 |
Lunar dust coats the spacesuit of Apollo 17 commander Gene Cernan after his final moonwalk in December 1972. The dust could be either friend or foe to future lunar explorers, so scientists are creating their own moondust in the laboratory to help test its effects on people and equipment. [NASA]
KUHLMAN: I hate dust. Du... | <urn:uuid:af4c4df3-2c67-40f2-90e5-e3b3d2d9d903> | 3.65625 | 423 | Audio Transcript | Science & Tech. | 55.605224 | 4,373 |
In 2007, the IPCC warned that “as global average temperature increase exceeds about 3.5°C [relative to 1980 to 1999], model projections suggest significant extinctions (40-70% of species assessed) around the globe.” On our current emissions path, we will warm far more than that this century, which suggests we risk the ... | <urn:uuid:6b57713b-03d6-4228-adff-23e8c6ac366f> | 3.265625 | 966 | Nonfiction Writing | Science & Tech. | 30.604414 | 4,374 |
Climate change hikes flood risks
Updated : 11/21/2012 14:30 GMT + 7
Latest research estimates 39 percent of the Mekong Delta and more than 20 percent of HCM City would be flooded by the end of this century if sea levels rise by one metre.
Director of the Vietnam Institute of Meteorology Hydrology and Environment Tran T... | <urn:uuid:404b4ae8-95c8-48e1-aba3-040c8614f09e> | 2.71875 | 490 | News Article | Science & Tech. | 29.559071 | 4,375 |
From the CORDIS News service: Predicting hot days in Europe
‘Red sky at night, shepherd’s delight, red sky in morning, fisherman’s warning.’ This saying is one of Europe’s earliest rhymes that were used to predict weather for the following day. With advances in modern technology, from radar to satellite imagery, we can... | <urn:uuid:9e5e0b1f-d5f6-4dfa-b208-6c33e755dd6c> | 3.796875 | 716 | News Article | Science & Tech. | 27.233635 | 4,376 |
Programs which give users access to privileges of any sort need to be able to authenticate the users. When you log into a system, you provide your name and password, and the login process uses those to authenticate the login -- to verify that you are who you say you are. Other forms of authentication than passwords are... | <urn:uuid:9331b09c-259f-49c1-8d55-bc09af163792> | 3.171875 | 1,697 | Documentation | Software Dev. | 44.404333 | 4,377 |
Science Fair Project Encyclopedia
|Name, Symbol, Number||selenium, Se, 34|
|Group, Period, Block||16 (VIA), 4, p|
|Density, Hardness||4790 kg/m3(300K), 2|
|Appearance|| grey, metallic lustre|
|Atomic weight||78.96 amu|
|Atomic radius (calc.)||115 (103) pm|
|Covalent radius||116 pm|
|van der Waals radius||190 pm|
|e- 's... | <urn:uuid:ebeb5f29-b3f5-43e1-abfc-303fd3e78ce2> | 3.484375 | 1,268 | Knowledge Article | Science & Tech. | 46.110453 | 4,378 |
New Materials for Sustainable Energy
Professor David S. Sholl holds the Michael E. Tennenbaum Family Chair and is the GRA Eminent Scholar for Energy Sustainability. His research vision is to develop new materials and processes that contribute to sustainable energy use on relevant global scales: gigawatts of energy and ... | <urn:uuid:e34aa2e1-f765-4c6b-91e5-b9b762bad126> | 2.65625 | 318 | About (Org.) | Science & Tech. | 15.368104 | 4,379 |
<!-- Download Links -->
<!-- Article image -->
Recently I wrote a program in which I wanted to generate a CRC for a given file. I did some checking on the web for sample CRC code, but found very few algorithms to help me. So I decided to learn more about CRCs and write my own code. This article describes what a CRC is,... | <urn:uuid:0c60b3be-45b9-4ed2-9304-75e4bad70941> | 3.96875 | 1,842 | Truncated | Software Dev. | 63.47 | 4,380 |
image credit: Jeff Schmaltz, MODIS Rapid Response System, Goddard Space Flight Center; image source; larger image
The Arctic Oscillation
Great Britain is usually exempt from the cold winter weather in other countries of the same latitude. (Warm air from the Gulf Stream keeps temperatures mild; read more here.) However,... | <urn:uuid:86562b12-a563-40ce-a90f-51de4ee6eabc> | 3.796875 | 184 | Content Listing | Science & Tech. | 35.463571 | 4,381 |
In this four-part article series, you'll learn about the model-view-controller (MVC) design architecture, why its use is a best practice when building web applications, and how using the Zend framework for PHP lets you make the most of this architecture. This article is excerpted from chapter 25 of the book Beginning P... | <urn:uuid:47328221-116d-492c-a31f-f03677971472> | 2.546875 | 1,064 | Truncated | Software Dev. | 37.856861 | 4,382 |
Algae may help corals withstand warmer waters
HONG KONG (Reuters) - Certain types of algae can help corals withstand higher sea temperatures and prevent them from bleaching, scientists in Australia have found.
Coral reefs are vulnera"le to climate change and without rapid genetic adaptation, they will not survive proje... | <urn:uuid:77ae3099-9edc-4805-b9aa-a773dd9aeca7> | 3.53125 | 443 | Truncated | Science & Tech. | 38.271744 | 4,383 |
Earth & Environment - Posted by Layne Cameron-Michigan State on Monday, May 16, 2011 9:07 - 0 Comments
Solar cells top Mother Nature
MICHIGAN STATE (US) — In a head-to-head battle of harvesting the sun’s energy, solar cells beat plants.
Plants’ evolutionary baggage is the culprit. All solar cells have to do is send ele... | <urn:uuid:2037d277-2689-42d9-87a5-8ee51f03b776> | 3.328125 | 511 | News Article | Science & Tech. | 36.574668 | 4,384 |
Bison produces deterministic parsers that choose uniquely when to reduce and which reduction to apply based on a summary of the preceding input and on one extra token of lookahead. As a result, normal Bison handles a proper subset of the family of context-free languages. Ambiguous grammars, since they have strings with... | <urn:uuid:47e25169-9714-48bf-a5b7-9bdecb6fc23c> | 2.703125 | 854 | Documentation | Software Dev. | 32.247941 | 4,385 |
Today is the first ever Fascination of Plants Day. The day's festivities are aimed at raising awareness of the importance of plant science to the future of our food and energy supplies, and our health.
Public events are taking place in 39 countries and UK partners include the John Innes Centre, Rothamsted Research, Kew... | <urn:uuid:87a01f3e-6d47-4c9e-a34e-efaa4aa01514> | 2.859375 | 1,253 | Listicle | Science & Tech. | 41.765408 | 4,386 |
Inscribed and Central Angles Showing that an inscribed angle is half of a central angle that subtends the same arc
Inscribed and Central Angles
⇐ Use this menu to view and help create subtitles for this video in many different languages. You'll probably want to hide YouTube's captions if using these subtitles.
- What I... | <urn:uuid:fcf126cf-8849-4aef-9f58-91a0b671c84b> | 4.09375 | 3,235 | Truncated | Science & Tech. | 79.858043 | 4,387 |
Interfacing Relational Databases to the Web
Why would one want to link a database to the web? A better question might be, “Why wouldn't one want to link a database to the web?” Static HTML pages are good for many things: documentation, hypertext books, personal pages and other unchanging information. However, static pa... | <urn:uuid:9043f7e5-1933-4138-9e9d-fa5322904c93> | 2.625 | 1,441 | Content Listing | Software Dev. | 63.452888 | 4,388 |
A transformation in which
a figure grows smaller.
Compressions may be with respect to a point (compression
of a geometric figure) or with respect to the axis of
a graph (compression
of a graph).
Note: Some high
school textbooks erroneously use the word dilation to
refer to all transformations in which the figure change... | <urn:uuid:a92d9dc1-9f60-42be-a2f6-c8cf2cec1cff> | 3.09375 | 139 | Structured Data | Science & Tech. | 25.023088 | 4,389 |
Life in a Drop of Water
by Mike Morgan
How often have we seen, in books aimed at the amateur microscopist, that one drop of sediment and water from the pond, would yield a wealth of organisms to view and wonder at?
I tried this, observing over a period of one hour, 25 microlitres of sediment/pond water.
Indeed there we... | <urn:uuid:bea94844-ca90-4f4e-8ab3-29604fe22595> | 2.9375 | 440 | Personal Blog | Science & Tech. | 48.515739 | 4,390 |
NOTE: Hover over the bold words for definitions or see the Glossary.
Rafinesque described this species in 1820. As with most species of the genus Lampsilis, the wavyrayed lampmussel exhibits sexual dimorphism in shell shape. Females are relatively circular, while males are more elliptical. The periostracum is a shiny g... | <urn:uuid:dfaa178f-69e9-4b78-bb65-472ad2c5abd8> | 2.984375 | 375 | Knowledge Article | Science & Tech. | 37.661379 | 4,391 |
:00 - :53
:53 - 1:06
1:06 - 1:27
1:27 - 1:36
Cal Tech geologist
1:36 - 1:51
2:00 - 2:16
--LEAD IN --
They are never before seen images.
And they were captured after the rover Curiosity made a historic touchdown on the red planet earlier this week.
John Zarrella reports on the mission to Mars and what scientists are cal... | <urn:uuid:ce49283b-dce8-49dd-98fd-eb3f42516caa> | 3.390625 | 789 | News Article | Science & Tech. | 69.634522 | 4,392 |
FASHIONISTAS take note: this material really does deserve to be labelled the new black - it absorbs virtually all the light that hits it.
This "blacker than black" stuff is an example of a class of substances known as metamaterials, which exhibit optical properties not normally found in nature.
Metamaterials consist of... | <urn:uuid:38e264ef-966c-4fa6-af77-ab3e50810926> | 2.96875 | 215 | Truncated | Science & Tech. | 34.296576 | 4,393 |
Fluid dynamics of flapping wings associated with change of domain topology
Seminar Room 1, Newton Institute
We re-examine the clap-fling-sweep mechanism employed by some insects to increase lift. As argued by Lighthill (J Fluid Mech 60(1):1-17, 1973), this mechanism can create a circulatory motion even in a totally inv... | <urn:uuid:2e8a4728-e673-40d5-bd9e-faef96e8c33a> | 2.8125 | 437 | Academic Writing | Science & Tech. | 37.933166 | 4,394 |
Name: Jason M.
Date: March 2004
I have been wondering how long the cells in our bodies
stay with us. I mean, I know that our cells are dividing and eventually
are passed from our bodies. I found that red blood cells have a life
span of 120 days, but what about the rest of our cells. How often do we
(basically) get a ne... | <urn:uuid:d7240d33-5082-4853-96d8-8771f40e6738> | 3.0625 | 743 | Knowledge Article | Science & Tech. | 63.979624 | 4,395 |
I have a biology final coming up and I would really appreciate it if someone could answer this question for me. Thank you very much!
The equation for photosynthesis is 6CO2 + 6H2O = C6H12O6 +6O2, which shows that energy is stored in the form of glucose, a 6 carbon sugar. This forms chains of starch, which are kept as a... | <urn:uuid:d3c3516c-65ee-44a6-b9a8-d6761ce311f7> | 3.609375 | 559 | Q&A Forum | Science & Tech. | 52.108364 | 4,396 |
NASA announced last week that an asteroid, which it feared would hit our planet in 2040, no longer posses a threat.
The asteroid, 2011 AG5, according to various calculations, had a little less than 1 percent chance to hit Earth sometime in the month of February 2040. Until now, it was estimated that the risk of the 140... | <urn:uuid:16bfadbf-9b33-4ff9-b0d5-d442dc1498d1> | 3.6875 | 298 | News Article | Science & Tech. | 46.880709 | 4,397 |
|Global annual mean temperature anomalies as measured by surface data (black bars) and the MSU satellite unit (gray bars) using the MSU-2R technique. Temperatures on the vertical axis are times 100 degrees C. (Illustration from Hurrell and Trenberth, "Satellite versus surface estimates of air temperature since 1979," J... | <urn:uuid:e9c9ad88-6550-45dd-8462-1e337f874011> | 3.359375 | 1,393 | Knowledge Article | Science & Tech. | 31.935713 | 4,398 |
The Prolog Language
Prolog (for PROgramming in LOGic) is a logic programming language loosely based on first-order logic. It was invented by Alain Colmerauer and Phillipe Roussel at the University of Aix-Marseille in 1971. Since then a large number of good implementations of the language have become available.
See http... | <urn:uuid:42241b82-0311-4b1d-b254-7819899e46d1> | 3.390625 | 93 | Knowledge Article | Software Dev. | 45.815 | 4,399 |