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For more than 20 years forest ecologist Geoffrey Parker has tracked the growth of 55 stands of mixed hardwood forest plots in Maryland. The plots range in size, and some are as large as 2 acres. Parker’s research is based at the Smithsonian Environmental Research Center, 26 miles east of the nation’s capital.
Parker’s ... | <urn:uuid:e77bd291-0fec-4bf6-80c8-de7fb5cc89a9> | 3.734375 | 1,009 | Audio Transcript | Science & Tech. | 50.53296 | 3,000 |
projects > across trophic level system simulation (atlss) > abstract
Computer Simulation Modeling of Intermediate Trophic Levels for Across Trophic Level System Simulations of the Everglades/Big Cypress Region
Michael Gaines, George Dalrymple, and Donald L. DeAngelis
This work has involved the modeling of intermediate ... | <urn:uuid:5c7db02c-318a-4231-a4f9-78ede3e429cb> | 2.75 | 1,451 | Academic Writing | Science & Tech. | 36.56972 | 3,001 |
Like a sort of homeworld security force, teams of astronomers are keeping their eyes on the sky for potential deadly invaders from space. They’ve already found most of the really dangerous ones, and now they’re looking for those that are the next threat-level down.
The potential invaders are asteroids with orbits that ... | <urn:uuid:4ec51525-a9c2-4954-a46b-433d85b3fdb8> | 3.46875 | 351 | Truncated | Science & Tech. | 57.265677 | 3,002 |
Right now, Earth is passing through a swarm of particles shed by the asteroid 3200 Phaethon as it moves through its orbit in the solar system. As we encounter the stream, many of the particles get swept into our atmosphere and get vaporized as they pass through. We see that action as meteors flashing across the sky. Th... | <urn:uuid:ffe1a97c-4e5e-462f-8a48-a8bfa0f6f83b> | 3.09375 | 487 | Personal Blog | Science & Tech. | 69.189354 | 3,003 |
Find information on stone-eating bacteria and learn when it was first observed.
Stone-eating bacteria belong to several families in the genus Thiobacillus. They can cause damage to monuments, tombs, buildings, and sculptures by converting marble into plaster.
The principal danger seems to come from Thiobacillus thiopar... | <urn:uuid:3c9ef156-6bd9-4e60-ad36-75daff3c518d> | 3.828125 | 264 | Knowledge Article | Science & Tech. | 26.827438 | 3,004 |
Learn more physics!
If at the Big Bang (t=0) energy was uniformly distributed inside the singularity, then entropy would have been maximal and nothing would have happened. What's missing?
We're used to many systems like weakly interacting gases where uniform distributions maximize entropy. For systems with gravitationa... | <urn:uuid:72bd206d-b805-4454-8978-2c34a9806074> | 3.4375 | 178 | Q&A Forum | Science & Tech. | 41.90875 | 3,005 |
Authors: John Hunter
Mach argued that since the acceleration of a body can only be measured relative to other bodies, then the inertia of masses is somehow due to the presence of distant matter in the universe. Here an alternative is put forward...that the acceleration (of one part of a body) can be measured relative t... | <urn:uuid:2ffba1d6-5f0d-4458-9d58-a73d39376e68> | 3.21875 | 160 | Truncated | Science & Tech. | 47.418846 | 3,006 |
Looking for Cramster? Cramster is now Chegg Homework Help. Learn More
Magnetic Field 2
A uniform ion beam of radius R consists if N' ions per meter ofmass
m, speed v, and charge q. Find the Lorentz force (due toboth
E and B) on an ion at the edge of the beam. At whatspeed
would the force become zero? | <urn:uuid:be32b9e0-7a0f-417d-af19-0b86ad608838> | 2.890625 | 86 | Q&A Forum | Science & Tech. | 85.881729 | 3,007 |
- CI’s ultimate goal is the achievement of zero deforestation across the globe by 2030.
- Intact forests and other natural ecosystems reduce the risk of catastrophic climate change impacts like floods and droughts.
- A 1-meter (3.3-foot) sea level rise could flood 17 percent of Bangladesh, one of the world's poorest co... | <urn:uuid:85f6a46b-9ea4-4292-8f7a-54f2702dc821> | 3.75 | 1,188 | About (Org.) | Science & Tech. | 23.454163 | 3,008 |
The National Ignition Facility out at the Lawrence Livermore National Laboratory in California is the size of a football stadium and equipped with the largest laser in the world. With said massive laser nearing completion — it'll be done by 2009 — and the facility scheduled to begin testing in 2010, the folks running t... | <urn:uuid:19f644cf-cd5d-4b61-afd1-c38ba4abc160> | 2.546875 | 197 | Personal Blog | Science & Tech. | 36.897045 | 3,009 |
Alleles: Alternative forms of the same gene region/locus.
Assignment test: A statistical approach to ascribing individuals to their most
probable natal populations on the basis of multiple DNA markers (Manel et al.2005).
FST: A classic measure of population genetic differentiation based on
differences in frequencies of... | <urn:uuid:812baf58-d31f-40df-bd0a-9d6d64e67336> | 3.453125 | 254 | Structured Data | Science & Tech. | 20.21875 | 3,010 |
Cold fronts are well-known for their transitions from one air mass (warm and humid) to another (cold and dry). In addition to a drop in temperature and dew point with frontal passage, winds shift from southwest before the front to northwest after frontal passage, showers and thunderstorms (sometimes severe) accompany t... | <urn:uuid:2686f212-4b8f-4b3d-ad96-49c133e0bf19> | 3.125 | 658 | Nonfiction Writing | Science & Tech. | 79.850955 | 3,011 |
The Ocean as a Biological Environment
The oceans hold the answers to many important questions about the development of the earth and the history of life on earth. For instance, within the rocks and sediment of the ocean floors the geological history of the earth is recorded. Fossils in this sediment record a portion of... | <urn:uuid:006a3991-03a9-4f10-acec-df6503781ff2> | 4.21875 | 722 | Knowledge Article | Science & Tech. | 37.416016 | 3,012 |
This handbook has been replaced by a newer version and is not maintained anymore.
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2. USE flags
2.a. What are USE flags?
The ideas behind USE flags
When you are installing Gentoo (or any other distribution, or even operating
system for that matter) you make choices depending on the env... | <urn:uuid:bb14845b-a6d9-482c-824d-60a3572bb344> | 3.484375 | 2,388 | Documentation | Software Dev. | 51.990155 | 3,013 |
This is a great question because we hear the term very often during severe weather season. Strong thunderstorms frequently have strong downdrafts associated with them.
A downdraft is basically a column of sinking air in a thunderstorm. When there is a particularly strong downdraft, we call it a downburst, or microburst... | <urn:uuid:a79c0600-dc29-4394-8048-bf03e852724f> | 3.609375 | 232 | Knowledge Article | Science & Tech. | 55.609261 | 3,014 |
Florida Bog Frog: Lithobates okaloosae
Genus/Species: Lithobates okaloosae Common Name: Florida bog frog
Federal Status: Not listed
FL Status:State Species of Special Concern
FNAI Ranks: G2/S2 (Imperiled)
IUCN Status: VU (Vulnerable)
The Florida bog frog is a small and rare amphibian that can reach a snout-to-vent leng... | <urn:uuid:9b87197e-ac88-4039-8ef0-c6a00ca36aeb> | 3.671875 | 1,144 | Knowledge Article | Science & Tech. | 43.238035 | 3,015 |
Zoologger is our weekly column highlighting extraordinary animals – and occasionally other organisms – from around the world
For most of us, blurry vision is a bad thing, if only because it means we're going to have to spend a lot of money on a new pair of glasses. For one jumping spider, though, it's how it catches di... | <urn:uuid:42d7737a-0862-4774-b230-cc772a5e1e9f> | 3.4375 | 1,094 | Truncated | Science & Tech. | 52.447769 | 3,016 |
Search our database of handpicked sites
Looking for a great physics site? We've tracked down the very best and checked them for accuracy. Just fill out the fields below and we'll do the rest.
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We found 16 results on physics.org and 241 results in our database of sites
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and... | <urn:uuid:bea29a3b-4521-4ddf-9815-8cb6ca8788cb> | 3.3125 | 344 | Content Listing | Science & Tech. | 54.424181 | 3,017 |
Physical Sciences Division
Sunlight Changes Aerosols in Clouds
Scientists show how sunlight alters optical, chemical properties of atmospheric particles
Image reproduced by permission of Professor Sergey Nizkorodov and the PCCP Owner Societies from Phys. Chem. Chem. Phys., 2011, 13, 3612-3629, DOI: 10.1039/C0CP02032J. ... | <urn:uuid:c2893b8b-9b73-4797-95e3-1e37d4af5db1> | 3.59375 | 855 | Knowledge Article | Science & Tech. | 28.354757 | 3,018 |
Hydrilla verticilata is the scientific name for this noxious invader from afar. No-one knows for sure where hydrilla is native to, yet its believed that it probably originated somewhere in southeast asia. This assumption comes from the fact that its main biocontrol comes from Pakistan.
Willows in the genus Salix have t... | <urn:uuid:52b9d21d-8265-4409-9bad-63f05a36d310> | 2.515625 | 139 | Truncated | Science & Tech. | 36.928559 | 3,019 |
MOSCOW, Russia - Russian scientists believe they have found a wholly new type of bacteria in the mysterious subglacial Lake Vostok in Antarctica, the RIA Novosti news agency reported on Thursday, March 7.
The samples obtained from the underground lake in May 2012 contained a bacteria which bore no resemblance to existi... | <urn:uuid:b321bb5a-5bb8-4250-8808-b6b9d0bba2aa> | 3.40625 | 557 | News Article | Science & Tech. | 44.819575 | 3,020 |
Image courtesy of YourWildLife.org
The Wildlife of Your Home Project
North Caroline State University (NCSU) researchers are studying the species living with us on our bodies as well as in the other biomes of our homes. As humans have moved from mud and thatch huts into pre-fab houses and highrise apartments, the bigges... | <urn:uuid:f0b40b8b-f83a-4297-9dbe-d13cefeafcf8> | 3.140625 | 405 | Knowledge Article | Science & Tech. | 33.609459 | 3,021 |
Solar panels and other types of solar-power generating equipment are more common now than they used to be. Driving around residential neighborhoods in San Diego and across the United States, shiny black solar panels can be seen on the roofs of many homes. Many commercial buildings also house solar power systems to gene... | <urn:uuid:dd49d143-87ed-42de-90fd-624e24c5c75a> | 3.640625 | 408 | Knowledge Article | Science & Tech. | 32.769772 | 3,022 |
Niranjan Barla’s Chemistry Questions
On 19th Feb, 2010, Niranjan Barla sent these questions:
Can u plz answer this ques??
1. The wooden shelves on which conc.Sulphuric Acid bottles are kept are
stained black. Why?
2. Dot diag. of ethyne.
Conc. Sulphuric acid has a very strong affinity for water, which is the reason beh... | <urn:uuid:4c14bec3-dde1-409d-ab8a-dbb5655cce82> | 2.890625 | 184 | Q&A Forum | Science & Tech. | 76.504524 | 3,023 |
It is easy to imagine that the lives of the ants resemble our own. ... Many of our stories about ants concern how hard they work and how they are reconciled to the anomie of life as a pawn in a larger system. Sometimes we imagine that the ants like it that way. Proverbs 6:6 admonishes the sluggard to emulate the hard-w... | <urn:uuid:00477f95-efa1-4d5e-b08a-9c53cd24beb5> | 2.9375 | 352 | News Article | Science & Tech. | 62.359113 | 3,024 |
Icebergs form when chunks of ice calve, or break off, from glaciers, ice shelves, or a larger iceberg. Icebergs travel with ocean currents, sometimes smashing up against the shore or getting caught in shallow waters.
Photo of the Day
Icebergs off the coast of St. Anthony
Read all about the latest weather news from arou... | <urn:uuid:b18f2f62-0eaf-4da3-a020-702096d0324a> | 2.96875 | 76 | Knowledge Article | Science & Tech. | 60.276513 | 3,025 |
Back to Deep-Water Corals
A Lophelia pertusa colony
Oil Affects on Reproduction of the Deep-Water Coral Lophelia pertusa on North Sea Oil Rigs
Waller, Roberts & Gass
The deep-sea coral Lophelia pertusa was first found growing on North Sea oil platforms in 1999, as the Brent Spar oil-storage buoy was decommissioned (Bel... | <urn:uuid:0b4af4be-56cd-4388-9223-9953c0226d4f> | 3.25 | 1,031 | Academic Writing | Science & Tech. | 38.472195 | 3,026 |
Lightning is visible through a silhouette of trees
Click on image for full size
Image Courtesy of University Corporation for Atmospheric Research/Carlye Calvin
Thunder and Lightning
Lightning is the most spectacular element of a thunderstorm. In fact it is how thunderstorms got their name. Wait a minute, what does thun... | <urn:uuid:2a555910-6e24-4302-b3ed-261b581b73a3> | 3.6875 | 575 | Knowledge Article | Science & Tech. | 61.870411 | 3,027 |
Click on image for full size
Image courtesy of Corel Photography
Though not the largest kingdom, with a mere 300,000 species catalogued, many might argue that the Kingdom Plantae just may be the most important group of living organisms.
In the process known as "photosynthesis", plants use the energy of the Sun to conve... | <urn:uuid:a50c28ce-9d44-4678-bb56-28960fcf67f9> | 3.375 | 623 | Content Listing | Science & Tech. | 50.359927 | 3,028 |
These images illustrate the typical spatial resolution used in state-of-the-art climate models around the times of each of the four IPCC Assessment Reports. Around the time of the First Assessment Report (FAR) in 1990, many climate models used a grid with cells of about 500 km (311 miles) on a side (upper left image). ... | <urn:uuid:cad19808-daf0-4a0c-b7a7-18d1c7cbd2ab> | 3.453125 | 648 | Content Listing | Science & Tech. | 50.276486 | 3,029 |
Visitors to the American Museum of Natural History in New York inspect a… (Mary Altaffer, Associated…)
Dinosaurs' gassy guts may have contributed to global warming tens of millions of years ago, according to a new study that finds a group of plant-eating dinosaurs could have produced about as much methane as all of tod... | <urn:uuid:e0e69113-bf3a-478d-bc5e-651eb2f88091> | 3.546875 | 747 | News Article | Science & Tech. | 28.914195 | 3,030 |
A marine heatwave off WA that flattened several fisheries and has been linked to a spate of shark attacks is likely to become more frequent, according to Australia's top science agency.
At a symposium in Perth today, the CSIRO will claim a sharp increase in ocean temperatures two years ago was caused by extreme climati... | <urn:uuid:fb11fdba-f6b0-4f97-ab47-21f90971bd6e> | 2.859375 | 470 | News Article | Science & Tech. | 38.241445 | 3,031 |
posted by Dr. Amber Jenkins
Dr. Tony Freeman, Earth science manager at NASA's Jet Propulsion Laboratory, is in Copenhagen attending what is being billed as a historical climate summit. This is the second of his dispatches from the negotiations.
As we get off the train at the COP-15 [Conference of Parties 15] conference... | <urn:uuid:0562f1e6-a99e-4095-9a2d-89ae518d5fb9> | 2.609375 | 465 | Personal Blog | Science & Tech. | 52.735 | 3,032 |
A fine way of both shortening and simplifying is if you use the question mark. It's called a ternary operator. With this, you can do conditional assignments on one line.
Consider the following example (taken from Bresenhams line algorithm) :
ystep = 1;
ystep = -1;
The code above could be shortened to one line:
int yste... | <urn:uuid:b1c59443-6be1-4388-89a4-6f4efdbceb8d> | 2.59375 | 102 | Tutorial | Software Dev. | 51.191607 | 3,033 |
To provide for maximum flexibility in adding software modules, your module is dynamically loaded as a shared object at run time. The list of loadable objects (modules) is maintained in a system configuration database file called OWconfig.
By default, Calibrator Tool reads OWconfig from the /usr/openwin/server/etc direc... | <urn:uuid:d89f064f-a810-4660-96da-201b9946c1db> | 2.65625 | 200 | Documentation | Software Dev. | 24.380128 | 3,034 |
20.1.2 Console I/O
- kbhit ()
Return true if a keypress is waiting to be read.
- getch ()
Read a keypress and return the resulting character. Nothing is
echoed to the console. This call will block if a keypress is not
already available, but will not wait for Enter to be pressed.
If the pressed key was a special functio... | <urn:uuid:c4d11d74-ba00-4c72-94bf-9f68b0119397> | 3.421875 | 219 | Documentation | Software Dev. | 71.427324 | 3,035 |
An object to simplify the interaction of the array with the ctypes module.
This attribute creates an object that makes it easier to use arrays when calling shared libraries with the ctypes module. The returned object has, among others, data, shape, and strides attributes (see Notes below) which themselves return ctypes... | <urn:uuid:de6b062c-58c9-41eb-8ad7-c9e0ec1393f2> | 2.515625 | 584 | Documentation | Software Dev. | 54.050769 | 3,036 |
When Michael Lefsky of Colorado State University released a first-of-a-kind map showing the height of the world’s forests in summer 2010, he made clear it was a first draft that would be refined in the future. Sure enough, a second map of global forest canopy height appeared in the pages of the Journal of Geophysical R... | <urn:uuid:7073335f-764b-4d1f-a1fb-9556ca745293> | 4 | 692 | Knowledge Article | Science & Tech. | 47.254761 | 3,037 |
There's an evening comet due to appear in our skies in March.
But whether the comet, named C/2011 L4 (PANSTARRS), sizzles or fizzles is yet to be determined.
The comet was discovered in June 2011 by Richard Wainscoat of the Institute for Astronomy at the University of Hawaii by using a telescope in Hawaii that is part ... | <urn:uuid:cb74f288-b229-4e71-9db6-a429cefc8e5d> | 3.46875 | 800 | News Article | Science & Tech. | 62.544025 | 3,038 |
cylonlover writes "Having successfully negotiated the challenging regulatory slopes of the U.S. Bureau of Land Management, the U.S. Forest Service, the U.S. Department of Energy, and a host of Oregon state agencies, the Newberry Enhanced Geothermal Systems (EGS) demonstration project is in the process of creating a new... | <urn:uuid:df716109-1b15-4534-840a-a692fd727eda> | 3.125 | 239 | Comment Section | Science & Tech. | 52.206064 | 3,039 |
The Physics Factbook™
Edited by Glenn Elert -- Written by his students
An educational, Fair Use website
topic index | author index | special index
The purpose of this lab is to determine the fractal dimension of broccoli.
A fractal is an object that has a fractional spatial dimension. The dimension of a point is 0, a l... | <urn:uuid:6b25ebf2-c9cc-446b-8d48-7e82a2cfd418> | 3.578125 | 449 | Knowledge Article | Science & Tech. | 63.814069 | 3,040 |
In the aftermath of the explosion of BP’s Deepwater Horizon drilling rig in the Gulf of Mexico, a dispersed oil plume was formed at a depth between 3,600 and 4,000 feet and extending some 10 miles out from the wellhead. An intensive study by scientists with the Lawrence Berkeley National Laboratory (Berkeley Lab) and t... | <urn:uuid:61483390-3bf8-4c40-a761-46a20e21022b> | 3.640625 | 1,776 | News Article | Science & Tech. | 20.933207 | 3,041 |
You probably have a local "Mystery Spot" in your area, and it undoubtedly features a gravity hill — that is, a place where either water or solid objects seem to move uphill against the force of gravity. But do these uncanny spots really defy the laws of physics?
Most publicized gravity hills require a few bucks to get ... | <urn:uuid:a1fa773f-073e-4998-a998-d8bd433b13fe> | 2.703125 | 831 | Nonfiction Writing | Science & Tech. | 57.471319 | 3,042 |
Mon December 5, 2011
The Deep-Sea Find That Changed Biology
Originally published on Wed May 23, 2012 8:14 am
In 1977, a small crew of oceanographers traveled to the bottom of the Pacific Ocean and stumbled across a brand new form of life. The discovery was so unusual, it turned biology on its head and brought into ques... | <urn:uuid:cf6b2569-23eb-49bf-8a9b-df397ea774a5> | 3.75 | 3,217 | News Article | Science & Tech. | 59.468496 | 3,043 |
Climate Change is Real
Thanks to extensive research and noticeable changes in weather and storm prevalence, it’s getting harder to turn a blind eye to the reality of climate change.
Since the Industrial Age spurred the increasing usage of fossil fuels for energy production, the weather has been warming slowly. In fact,... | <urn:uuid:6e8d9e56-223a-4f33-862d-7888a3a656ec> | 3.65625 | 628 | Knowledge Article | Science & Tech. | 25.380418 | 3,044 |
2012 is the centenary of Alan Turing's birth, and as part of our celebrations our NRICH project has a special focus this month on codes and ciphers, with engaging mathematical activities for Key Stages 1 right through to 5 (ages 5 to 18).
Turing's astonishing achievements included his work during the Second World War a... | <urn:uuid:77d35401-7f6c-49f9-994d-957535ad8e66> | 3.140625 | 198 | News (Org.) | Science & Tech. | 35.168086 | 3,045 |
FileStream Constructor (String, FileMode)
Assembly: mscorlib (in mscorlib.dll)
path is an empty string (""), contains only white space, or contains one or more invalid characters.
path refers to a non-file device, such as "con:", "com1:", "lpt1:", etc. in an NTFS environment.
path refers to a non-file device, such as "... | <urn:uuid:44789907-113a-46e8-85d7-1cd01d65744b> | 3.109375 | 357 | Documentation | Software Dev. | 49.664695 | 3,046 |
Runtime Callable Wrapper
The common language runtime exposes COM objects through a proxy called the runtime callable wrapper (RCW). Although the RCW appears to be an ordinary object to .NET clients, its primary function is to marshal calls between a .NET client and a COM object.
The runtime creates exactly one RCW for ... | <urn:uuid:ba7fb0fa-9ab8-4705-bcfd-314aaf2aa3ef> | 2.90625 | 396 | Documentation | Software Dev. | 47.93825 | 3,047 |
Contains information about a single instance of a Binding.
Assembly: PresentationFramework (in PresentationFramework.dll)
The Binding class is the high-level class for the declaration of a binding. The class is the underlying object that maintains the connection between the binding source and the binding target. A Bind... | <urn:uuid:9adc0aef-bc48-4272-9c65-3998ebfdb800> | 2.84375 | 451 | Documentation | Software Dev. | 41.070973 | 3,048 |
Monster from the deep hits the surface
The giant squid is one of the most enigmatic animals on the planet. It is extremely rarely seen, except as the remains of animals that have been washed ashore, and placed in the formalin or ethanol collections of museums. But now, researchers at the University of Copenhagen leadin... | <urn:uuid:5f44eef0-d781-4769-9047-fdf2c518dd3a> | 3.203125 | 1,022 | News (Org.) | Science & Tech. | 36.896285 | 3,049 |
An environment that simulates a protractor carrying a right- angled
triangle of unit hypotenuse.
Can you explain what is happening and account for the values being
On a nine-point pegboard a band is stretched over 4 pegs in a
"figure of 8" arrangement. How many different "figure of 8"
arrangements can be made ?
Three s... | <urn:uuid:62a51bfb-1a95-49fb-a428-baed2d801c86> | 3.828125 | 334 | Content Listing | Science & Tech. | 70.478375 | 3,050 |
if we use gettype() before initializinf any variable it give NULL
it will show
add a note User Contributed Notes Tipos - [4 notes]
shahnaz khan ¶
8 years ago
arjini at gmail dot com ¶
7 years ago
Note that you can chain type castng:
var_dump((string)(int)false); //string(1) "0"
Trizor of www.freedom-uplink.org ¶
8 year... | <urn:uuid:ab815cd2-e613-4520-b1d0-f22eb59382b6> | 2.890625 | 713 | Comment Section | Software Dev. | 61.309512 | 3,051 |
SEND + MORE = MONEY, Part 2
August 3, 2012
In the previous exercise we looked at two slow solutions to the SEND + MORE = MONEY cryptarithm. In today’s exercise we look at two more solutions.
Our third solution uses a hill-climbing algorithm. The basic idea is to start with a random solution, score it, then alter it, sc... | <urn:uuid:bfa1e634-e169-4015-b145-657df01cd79a> | 2.703125 | 537 | Tutorial | Software Dev. | 50.709286 | 3,052 |
Images show never-before-seen fault lines – plus cows, trees
COLUMBUS, Ohio – Researchers have completed the most meticulous survey ever made of the San Andreas Fault, and they've found detailed features that nobody could have seen before.
Michael Bevis, Ohio Eminent Scholar in geodynamics and professor of civil and en... | <urn:uuid:14fbe3a8-6eae-4116-8283-637b087e8c32> | 3.625 | 934 | News Article | Science & Tech. | 53.401667 | 3,053 |
One of the most frightening and
destructive phenomena of nature
is a severe earthquake and its
An earthquake is a sudden movement
of the Earth, caused by the abrupt release
of strain that has
accumulated over a long time. For hundreds
of millions of years, the forces of plate
tectonics have shaped the Earth as the
huge... | <urn:uuid:432c4961-d354-4ca9-921e-45fa557e8ff2> | 3.921875 | 267 | Knowledge Article | Science & Tech. | 29.405 | 3,054 |
“It’s exciting to discover the hidden magic of seagrasses. If you put a piece of seagrass in a tank in the lab, all the little creatures that inhabit the meadow slowly start emerging – crabs, small mollusks and other invertebrates make the tank come to life.”
The results of new research are as surprising as the hidden ... | <urn:uuid:d5862bdd-4922-4e4e-b63c-f65aa9f730f4> | 3.78125 | 1,112 | Knowledge Article | Science & Tech. | 31.505135 | 3,055 |
Related Forms:A Closer Look
Albert Einstein's two theories of relativity
were the first successful revisions of Newtonian mechanics—a mechanics so simple and intuitive that it was held to be a permanent fixture of physics. Uniting the theories is the idea that two observers traveling relative to each other may have dif... | <urn:uuid:13f56899-cb2f-4e94-9e9f-5e8e06a8b08e> | 3.96875 | 462 | Knowledge Article | Science & Tech. | 25.969825 | 3,056 |
NASA's Nuclear Spectroscopic Telescope Array (NuSTAR) launched into the morning skies over the central Pacific Ocean at 9 a.m. PDT (noon EDT) Wednesday, beginning its mission to unveil secrets of buried black holes and other exotic objects.
"We have been eagerly awaiting the launch of this novel X-ray observatory," sai... | <urn:uuid:04ba5df6-164a-4050-a5c6-e46612bd6a2b> | 2.609375 | 207 | Comment Section | Science & Tech. | 39.95092 | 3,057 |
We hear a lot these days about energy. The common paradigm is that energy equals oil or vice versa, oil equals energy. Is that true?
According to people like Thomas Bearden and John Bedini, that is simply not true. Thomas Bearden, for instance, has the saying that “there is enough energy inside the space of an empty te... | <urn:uuid:89482933-e3ec-4e6d-b8ee-9e2f1b439c66> | 2.875 | 509 | Personal Blog | Science & Tech. | 57.844682 | 3,058 |
The University of Sydney carries research in areas not relating to communications or sensing. One particular area is high power fibre lasers with an emphasis on mid-infrared light generation. The fibre lasers are pumped using the diode lasers and the well-known cladding pumping technique. Diode lasers are efficient sou... | <urn:uuid:efa65e39-944c-46f7-ae8d-47a3c8d37312> | 2.90625 | 391 | About (Org.) | Science & Tech. | 36.009808 | 3,059 |
Standard Temperature and|
ALWAYS use liters, Degrees Kelvin and
pressure in torr for these calculations.
For an STP Calculator With More Input Options
Gas volumes are compared at a Standard
Temperature and Pressure of:|
273.15° Kelvin and 760 torr.
At STP, one mole of any gas should
have a volume of 22.4 liters.
Here i... | <urn:uuid:1234d669-e443-4a7a-8c7a-5047557c9cec> | 3.359375 | 288 | Tutorial | Science & Tech. | 57.304112 | 3,060 |
Geysers reveal likely ocean on Saturn moon
Saturn's strange ice ball moon Enceladus may have a salty ocean lurking beneath its frozen surface.
The new study, reported in the journal Nature, helps explain the origin of the icy liquid plumes of water spewing out of the tiny moon and possibly forming one of Saturn's majes... | <urn:uuid:1ac63c7f-b46c-47ec-9b01-211ac1b371f9> | 3.46875 | 811 | News Article | Science & Tech. | 41.562962 | 3,061 |
Science subject and location tags
Articles, documents and multimedia from ABC Science
Monday, 21 May 2012
Massive extraction of groundwater can resolve a puzzle over a rise in sea levels in past decades, according to scientists in Japan.
Friday, 4 May 2012
Scientists have used sound waves to determine the composition o... | <urn:uuid:7f10099a-c0af-47ae-8300-d027c48b35c3> | 2.703125 | 436 | Content Listing | Science & Tech. | 43.01631 | 3,062 |
Boulder star coral (Montastraea annularis)
Classified as Endangered (EN) on the IUCN Red List (1) and listed on Appendix II of CITES (2).
Prior to 1994, the wide variability exhibited in the appearance of Montastraea annularis was attributed to the different environmental conditions in which it occurs (3). However, sci... | <urn:uuid:02bc429d-b5f5-4b51-a5b2-436590e08245> | 4.1875 | 1,365 | Knowledge Article | Science & Tech. | 40.797097 | 3,063 |
(p. D2) . . . most of the horror-movie scenarios are looking less and less plausible. Climate change will probably occur not with a bang but with a long, slow whimper, as you can see in the new report from the Intergovernmental Panel on Climate Change.
The report concludes that it's ''very likely'' that humans are now ... | <urn:uuid:54997467-1e60-4c61-82b5-9d8da22f15e0> | 2.765625 | 906 | Nonfiction Writing | Science & Tech. | 56.510165 | 3,064 |
Earth from Afar: A Tiny Flickering Dot
Credit: ESA Darwin Mission
With over 70 planets identified around distant stars, astronomers are now looking for ways to classify which ones are most like Earth that is to say, the ones most likely with biological potential. Some initial qualifications are already known: Earth-lik... | <urn:uuid:197b854e-83a5-42b6-8940-86ddc703c4ba> | 3.890625 | 1,457 | Knowledge Article | Science & Tech. | 31.615459 | 3,065 |
As the list of genetic diseases that could be cured by gene therapy continues to grow, a concern for scientists has been how to best deliver modified genes to patients. The challenges in this area are many—from delivery to preventing immune responses. But perhaps the most basic challenge is how to best replace an exist... | <urn:uuid:f8d853f4-a287-42c1-8dae-4796fe50f5c2> | 3.5 | 558 | News Article | Science & Tech. | 48.235105 | 3,066 |
When graphing a tangent transformation, start by using a theta and tan(theta) t-table for -pi/2 to pi/2. In the case of y=Atan(Bx) or y=Atan(B(x-h)), define Bx or B(x-h) to be equal to theta and solve for x. Now use this equation to create a x and Atan(Bx) or Atan(B(x-h)) table, which will give coordinate pairs to plot... | <urn:uuid:6d59c768-0be4-4bd8-a734-2800110e8d23> | 4.15625 | 632 | Personal Blog | Science & Tech. | 76.093598 | 3,067 |
Most earthworms may be tiny, but a new study suggests their impact on the climate could be mighty.
Researchers had long assumed the creepy crawlers help store carbon in soils by consuming fallen leaves and other decaying plant matter, which they deposit in soil in their cast, or droppings. But newer studies suggest the... | <urn:uuid:71e6ac2f-8209-4a65-b033-9341cd089d61> | 3.96875 | 1,004 | News Article | Science & Tech. | 44.401506 | 3,068 |
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- Paleo-perspectives on ocean acidification
Trends in Ecology & Evolution, Volume 25, Issue 6, 1 June 2010, Pages 332-344
Carles Pelejero, Eva Calvo and Ove Hoegh-Guldberg
... | <urn:uuid:c6b178ee-b1fc-42c6-aa03-c5e1b70a9e6c> | 2.625 | 1,033 | Academic Writing | Science & Tech. | 20.649225 | 3,069 |
There may be something interesting coming out in the climate front over the next few weeks from CERN.
Years ago, a researcher named Henrik Svensmark developed a hypothesis that cosmic rays can seed cloud formation, and thus when there are more cosmic rays, there may be more clouds. This is interesting because it may ac... | <urn:uuid:5d850629-c34d-417d-875e-7372473d9544> | 3.546875 | 732 | Personal Blog | Science & Tech. | 36.441063 | 3,070 |
The outer atmosphere is changing and scientists have yet to find out why this is. The highest clouds hide a mystery that is as eery as the evidence is enthralling. First ever pictures of the clouds shot by Nasa reveal bizarre phenomena.
The images captured by Nasa's AIM probe show clouds that shine in the night. This i... | <urn:uuid:b61c99e2-f9e5-4efe-9f90-02bbfbe11f36> | 3.71875 | 543 | Truncated | Science & Tech. | 55.275881 | 3,071 |
Properties of the Elements
Properties of an element are sometimes classed as either chemical or physical. Chemical properties are usually observed in the course of a chemical reaction, while physical properties are observed by examining a sample of the pure element. The chemical properties of an element are due to the ... | <urn:uuid:64d1b319-9cf1-457c-ad67-ae68587217a5> | 4.3125 | 304 | Knowledge Article | Science & Tech. | 21.220242 | 3,072 |
methane (mĕthˈān) [key], CH4, colorless, odorless, gaseous saturated hydrocarbon; the simplest alkane. It is less dense than air, melts at - 184°C, and boils at - 161.4°C. It is combustible and can form explosive mixtures with air. Methane occurs naturally as the principal component of natural gas; it is formed by the ... | <urn:uuid:78398696-f345-40d3-8645-c5e10806e487> | 3.796875 | 371 | Knowledge Article | Science & Tech. | 34.808439 | 3,073 |
A rather well known scientist named Ray Kurzweil believes the concept of nanoscopic electronic devices is feasible by 2030. These tiny devices (similar to devices referred to as “nanites” on Star Trek: The Next Generation) will enter the bloodstream and augment various bodily functions, including the possibility of tra... | <urn:uuid:942e4267-e67d-4dfb-af01-91d9b0b0d555> | 2.546875 | 4,884 | Comment Section | Science & Tech. | 56.756325 | 3,074 |
Many marine ecologists think that the biggest single threat to marine ecosystems today is overfishing. Our appetite for fish is exceeding the oceans' ecological limits with devastating impacts on marine ecosystems. Scientists are warning that overfishing results in profound changes in our oceans, perhaps changing them ... | <urn:uuid:5eb317fe-d4c5-477f-8d6a-405a0c981b07> | 3.453125 | 517 | Knowledge Article | Science & Tech. | 35.548982 | 3,075 |
Stock Status: In Stock
Looking at solutions to the climate and energy crisis, author Béla Lipták shares his expertise on a cost-effective solar-hydrogen economy in his latest book entitled Post-Oil Energy Technology: The World’s First Solar – Hydrogen Demonstration Power Plant. Demonstrating the feasibility of a clean,... | <urn:uuid:87182d68-6052-4ba9-9ea5-5b2a555851d8> | 2.734375 | 226 | Content Listing | Science & Tech. | 11.981357 | 3,076 |
|BERKELEY, CA Researchers at the
U.S. Department of Energy's Lawrence Berkeley National Laboratory have demonstrated that
liquids known as ferrofluids, in response to magnetic fields, can flow in any direction
through soils of different permeability to assume predetermined, uniformly distributed
Ferrofluids are colloid... | <urn:uuid:101f4aad-b638-466b-bb9c-1248506e7f84> | 3.421875 | 866 | News (Org.) | Science & Tech. | 21.607604 | 3,077 |
Microbes (living organisms so small we cannot see them without magnification) play fundamental roles in every aspect of life on this planet. Recently, enormous effort has gone into characterizing the microbes in the outdoor world (from the bottom of the oceans to the upper reaches of the atmosphere) as well as those in... | <urn:uuid:4e3e549c-1fa4-400f-9ee4-bf9ffa5594d9> | 2.5625 | 267 | About (Org.) | Science & Tech. | 27.925934 | 3,078 |
SAN FRANCISCO — The moon and other rocky bodies in the inner solar system were pounded by long-ago impacts far more violently than previously thought, two NASA spacecraft have found.
NASA's twin Grail probes have created an ultra-precise gravity map of the moon, revealing that its crust is almost completely pulverized.... | <urn:uuid:4b88ac1d-2375-455d-9368-784db560604a> | 3.84375 | 1,087 | News Article | Science & Tech. | 48.025764 | 3,079 |
Officials from around the world were quick to call for greater vigilance in monitoring meteors.
"Today's event is a strong reminder of why we need continuous efforts to survey and identify near-Earth objects," said Thomas Reiter, European Space Agency's Director of Human Spaceflight and Operations.
Deep Space Industrie... | <urn:uuid:a85773c2-22ed-4227-974f-d3ec02e9a914> | 2.875 | 301 | News Article | Science & Tech. | 33.545143 | 3,080 |
Lisa Grossman, reporter
Swiss scientists plan to launch a shoebox-sized satellite with jellyfish-like tentacles to sweep up space junk as early as 2016.
The $11 million satellite, called CleanSpace One, would chase down space junk and drag it out of orbit, burning up during atmospheric re-entry in the process. Swiss sp... | <urn:uuid:cd1e7ad8-f6d2-4580-8df0-85373dad96c7> | 2.953125 | 586 | News Article | Science & Tech. | 39.169015 | 3,081 |
News From the Field
A New Wrinkle in Ancient Ocean Chemistry
October 29, 2009
A research team led by University of California, Riverside, geoscientists has corroborated evidence that oxygen production began in the Earth's oceans at least 100 million years before the Great Oxidation Event (GOE). The researchers analyzed... | <urn:uuid:84319940-ea02-4fc8-9ae0-42bc907cd19d> | 2.671875 | 326 | News (Org.) | Science & Tech. | 62.617273 | 3,082 |
|May12-12, 08:15 PM||#1|
I was just thinking about electromagnetic fields and magnetostatics. Magnetostatics is the study of magnetic fields where they do not change or very little. I was wondering if a static magnetic field is still considered part of a Electromagnetic field? Since the magnetic field is not changing, ... | <urn:uuid:237a2366-c6fc-449f-8feb-f1466ca2787c> | 2.859375 | 607 | Comment Section | Science & Tech. | 47.06192 | 3,083 |
Scientists from every discipline have more data than ever, but it’s only as useful as the meaning behind it. Every bit of information is only explained by the context in which it was gathered, and often in the context in which it is used. “There is no such thing as raw data,” says Bill Anderson of the School of Informa... | <urn:uuid:ed462c3f-d654-4db3-9202-60fa77affad8> | 3.21875 | 429 | News Article | Science & Tech. | 41.904621 | 3,084 |
ALTER USER username [ WITH PASSWORD 'password' ] [ CREATEDB | NOCREATEDB ] [ CREATEUSER | NOCREATEUSER ] [ VALID UNTIL 'abstime' ]
The name of the user whose details are to be altered.
The new password to be used for this account.
These clauses define a user's ability to create databases. If CREATEDB is specified, the ... | <urn:uuid:e99eb581-6fb7-45e3-9366-30e037f698b8> | 2.5625 | 399 | Documentation | Software Dev. | 39.798419 | 3,085 |
SA Perspectives: Last Chance for the Last Planet; May 2002; Scientific American Magazine; by Staff Editor; 1 Page(s)
Scientists joke that it can take longer for a space mission to escape from Washington, D.C., than to cross the solar system: the harshness of outer space is nothing compared with the rigors of securing a... | <urn:uuid:bc83ce27-2695-439a-80f5-3da5d6583e6b> | 2.640625 | 211 | Truncated | Science & Tech. | 47.588384 | 3,086 |
The following is from:http://www.ornl.gov/ORNLReview/rev28_2/text/bio.htm
Top: Growing forest accumulates carbon until it achieves, over time, a balance between the carbon taken up in photosynthesis and the carbon released back to the atmosphere from respiration, oxidation of dead organic matter, and fires and pests. I... | <urn:uuid:16b02005-ead3-401a-8ff5-bb716d784d65> | 3.734375 | 209 | Knowledge Article | Science & Tech. | 37.3 | 3,087 |
CAPE CANAVERAL, Fla. — Now’s your chance to see the comet that passed within 100 million miles of Earth last week.
Twilight on Tuesday will provide the best photo opporutnity for the comet called Pan-STARRS. It will be visible in the Northern Hemisphere just above the western horizon, right next to a crescent moon.
Cal... | <urn:uuid:65bd198a-7b51-4c3f-8302-8e0ff53a0918> | 2.828125 | 515 | News Article | Science & Tech. | 57.807214 | 3,088 |
That haunting image from science fiction movies showing astronauts hibernating during long space voyages may not be as far-fetched as it seems.
We would be a bit closer if someone could figure out exactly how some other animal, say a ground squirrel, can put itself to sleep for the cold months of winter and then rouse ... | <urn:uuid:0cc20437-6e1f-4ad8-9755-eb9a7cb375c4> | 3.875 | 703 | News Article | Science & Tech. | 38.762861 | 3,089 |
|Active Cavity Radiometer Irradiance Monitor
Ctrl-Click on figures for high resolution pdf version
Total Solar Irradiance (TSI) Monitoring
Figure 1 TSI monitoring by satellite experiments
Updated April, 2013
The Earth’s weather and climate regime is determined by the total solar irradiance (TSI) and its interactions wi... | <urn:uuid:7c1d7bdf-a24c-489e-b470-24c178eb23fd> | 2.875 | 1,948 | About (Org.) | Science & Tech. | 14.742416 | 3,090 |
|In this section...|
Consider the case of an array of a given component type. For each component the compiler must allocate a storage field with a certain number of bits. There may also be some gaps (that is, unused bit fields) between two consecutive components. The effect of the pragma PACK is to instruct the compile... | <urn:uuid:3c51ed86-d51f-4ea2-8326-5d62ccef1191> | 3.046875 | 2,096 | Documentation | Software Dev. | 41.519494 | 3,091 |
Ars Technica: Because honey is an expensive food product, it has fallen prey to smuggling and counterfeiting: Honey snuck into the US from other countries, such as China, may be tainted with antibiotics or heavy metals, and some honey producers water down their product with corn or rice syrup, malt, or sugar. To separa... | <urn:uuid:266df746-c818-4dd5-9df9-e2672f6b7ddd> | 2.734375 | 169 | News Article | Science & Tech. | 30.111525 | 3,092 |
UK nature is in trouble – that is the conclusion of a groundbreaking report published today by a coalition of leading conservation and research organisations.
Species to look out for
Welcome to Butterfly Conservation Warwickshire - Saving butterflies, moths and our environment.
We work alongside land owners, local auth... | <urn:uuid:98880268-35ce-4fe2-9f31-e9d29ff2abf7> | 3.0625 | 361 | About (Org.) | Science & Tech. | 35.326557 | 3,093 |
Astronauts challenge the patriotism of Global Warming Alarmists by planting flags
The paper, ‘Rocks Can Fly’ is a cogently-argued scientific refutation of the basic equations used by flight theorists. Apparently, rocket scientists may have incorrectly assumed the forces acting on rockets all along.
The study questions ... | <urn:uuid:f03f27aa-d5a5-47f9-bd6c-df790dd0f643> | 3.453125 | 943 | Personal Blog | Science & Tech. | 43.768415 | 3,094 |
The Element Sulfur
[Click for Isotope Data]
Atomic Number: 16
Atomic Weight: 32.065
Melting Point: 388.36 K (115.21°C or 239.38°F)
Boiling Point: 717.75 K (444.60°C or 832.28°F)
Density: 2.067 grams per cubic centimeter
Phase at Room Temperature: Solid
Element Classification: Non-metal
Period Number: 3 Group Number: 16... | <urn:uuid:00de8263-6d30-44fe-a499-f7df874de870> | 4.21875 | 778 | Knowledge Article | Science & Tech. | 50.930912 | 3,095 |
An extremophile (from Latin extremus meaning "extreme" and Greek philiā (φιλία) meaning "love") is an organism that thrives in physically or geochemically extreme conditions that are detrimental to most life on Earth. In contrast, organisms that live in more moderate environments may be termed mesophiles or neutrophile... | <urn:uuid:6445d790-83f9-41fc-8b78-fec744d1467f> | 4 | 3,090 | Knowledge Article | Science & Tech. | 37.204442 | 3,096 |
|Taq polymerase, exonuclease|
DNA polymerase bound to a DNA octamer
Taq polymerase (pron.: / /) is a thermostable DNA polymerase named after the thermophilic bacterium Thermus aquaticus from which it was originally isolated by Thomas D. Brock in 1965. It is often abbreviated to "Taq Pol" (or simply "Taq"), and is frequ... | <urn:uuid:711f3995-9064-4037-a8cc-dc6bfc9a93f1> | 2.90625 | 1,730 | Knowledge Article | Science & Tech. | 59.89779 | 3,097 |
Looking back at Hurricane Gustav's record 211 mph wind gust
As we look back at the weather events of 2008, perhaps the most impressive record set during the year occurred during Hurricane Gustav, which pounded Cuba as a Category 4 hurricane in August. Gustav set a new world record for highest wind gust ever measured in... | <urn:uuid:c81d92fd-03a5-4484-b3a9-23f0a09ffd63> | 2.859375 | 1,188 | Personal Blog | Science & Tech. | 50.08505 | 3,098 |
USGS Multimedia Gallery
Title: Endangered Hawaiian Hoary Bat
An endangered Hawaiian hoary bat, a species that is sometimes killed by wind turbines. USGS scientists from Hawaii and Colorado are devising a way to directly observe bat occurrence and behavior at wind turbines using a video system composed of high-powered i... | <urn:uuid:22f9ef61-417e-4a7e-8ac6-31cf851e7f37> | 3.34375 | 228 | Truncated | Science & Tech. | 17.645 | 3,099 |