text stringlengths 174 655k | id stringlengths 47 47 | score float64 2.52 5.25 | tokens int64 39 148k | format stringclasses 24
values | topic stringclasses 2
values | fr_ease float64 -483.68 157 | __index__ int64 0 1.48M |
|---|---|---|---|---|---|---|---|
Here is an excerpt as related to that last point:
Focusing on the past six decades, we observe no sustained upward trends in wind speed distributions (Figs. 1 and 3), the mean wind speed at landfall or the annual frequency of occurrence of landfalling segments (Fig. 8). (Note that this annual frequency is specific to l... | <urn:uuid:731c2f49-ebd6-413a-97e7-00ce77aa3acb> | 2.671875 | 432 | Academic Writing | Science & Tech. | 25.341491 | 1,700 |
The principles of validation are almost the same as I have given on the previous page, so I won’t repeat them. The one difference is that it is not helpful to try to validate checkboxes at the moment they are checked; it is best left until submission time.
The validateCheckbox routine in the code assumes that multiple ... | <urn:uuid:9c765a18-0fac-42d2-a290-7297db14ebb2> | 2.546875 | 236 | Documentation | Software Dev. | 54.558154 | 1,701 |
Twin Rovers Headed for Mars
|Tweet|Twin Rovers Headed for Mars NASA today announced plans to launch two large scientific
rovers to the red planet in 2003.
August 10, 2000
-- The traffic on Mars is expected to double in the near future.
NASA today announced plans to
launch two large scientific rovers to the red planet i... | <urn:uuid:79958e87-a8a1-4ff2-90d7-2b630f1b2c09> | 2.921875 | 1,285 | News Article | Science & Tech. | 47.5989 | 1,702 |
Flying a spacecraft to a far planet, millions of miles away, takes many talented people
working with very special equipment.
In planning the mission, engineers and scientists decide what kinds of instruments ride on
board the spacecraft and what kind of information is gathered. They plan the spacecraft's journey
by mak... | <urn:uuid:b13de43d-8e9f-4df2-8414-7592864b12be> | 4.46875 | 224 | Knowledge Article | Science & Tech. | 33.378675 | 1,703 |
One of the outstanding achievements of 20th Century science was the realisation that the great diversity of nature is based on a handful of elementary particles acting under the influence of only a few fundamental forces. This talk aims to give an overview of the natural forces that shape everything around us and outli... | <urn:uuid:5c6e8595-d959-401d-8022-7f7225a700c5> | 3.03125 | 917 | Content Listing | Science & Tech. | 42.27272 | 1,704 |
Diablo Canyon Power Plant / AP
This photo provided by the Diablo Canyon Power Plant on Friday shows salp, a gelatinous sea creature, at a nuclear reactor intake structure.
In Japan, it was a monstrous earthquake and tsunami that brought down the Fukushima nuclear plant. In California, it’s a tiny, jellyfish-like sea cr... | <urn:uuid:e383f7e8-c1e3-4cee-b29d-af727c6130bc> | 3.140625 | 1,102 | News Article | Science & Tech. | 50.127728 | 1,705 |
Lunar surface still active: study
Active Moon A new study indicates the Moon may not be as geologically dead as previously thought, showing signs that it is simultaneously stretching and shrinking.
New high-resolution images from NASA's Lunar Reconnaissance Orbiter, show parts of the Moon's surface are being pulled apa... | <urn:uuid:ca84e223-82e4-41ff-9382-2e4512d58fc0> | 3.90625 | 516 | News Article | Science & Tech. | 46.319212 | 1,706 |
The Western Diamond Back Rattle Snake
The western diamond back rattle snake lives in the badlands and semi desert areas of North America, where its tough skin prevents it fromlosing too much moisture. It conserves water by excreting thick paste urine. It adjusts its daily behavior to regulate body heat, alternately bas... | <urn:uuid:ac0d9b25-8172-4a3e-8e20-47e04ad202af> | 3.75 | 673 | Knowledge Article | Science & Tech. | 50.466313 | 1,707 |
International Business Times
Natural climatic changes have led to the total ecosystem collapse of coral reefs, suggest a new report. According to a study by the Florida Institute of Technology, climate shifts have stalled the reef growth in the eastern Pacific for 2,500 years.
The Daily Telegraph
Pacific to shut down t... | <urn:uuid:41da48c3-3502-49fe-928c-8930884ce95e> | 2.6875 | 107 | Content Listing | Science & Tech. | 55.262332 | 1,708 |
We are remembered by our exaggerations. So at a recent reunion of my former research-group members, several recalled my saying "When you see a standard deviation in an x-ray crystal structure, multiply it by pi [π, 3.141...], or if the structure is done by friends, by e [2.718...]."
I was talking about structures of mo... | <urn:uuid:40d9e532-38da-4823-a06a-47ce1c0effc9> | 3.171875 | 288 | Comment Section | Science & Tech. | 39.263077 | 1,709 |
[antlr-interest] What do . (period) and Tokens mean in tree grammars?
Harald M. Müller
harald_m_mueller at gmx.de
Sat Dec 29 14:16:13 PST 2007
Sorry that I ask - but I did not find it on the Wiki and not in the ANTLR
book: What do . and Tokens mean in tree grammars?
AFAIK, . means "any complete subtree." - although thi... | <urn:uuid:fbf907f8-5cfd-471c-ad04-918cb363fe58> | 2.6875 | 468 | Comment Section | Software Dev. | 67.344652 | 1,710 |
Comet ISON will light up the sky
This interplanetary visitor may be the brightest comet ever.
September 25, 2012
About a year from now, Comet C/2012 S1 (ISON) probably will become the brightest comet anyone alive has ever seen. How bright it could get is currently the subject of vigorous discussion among planetary scie... | <urn:uuid:fa70bfcc-a13f-4826-843a-ff6b62d7357a> | 3.3125 | 751 | News Article | Science & Tech. | 61.731052 | 1,711 |
When the scientists combined the light from two 8-meters telescopes with MIDI, they could simulate the resolving power of a telescope with a diameter of about 100 meters. These observations gave a "visibility function," which measures how resolved a source is: A visibility of 1 happens when a source is completely unres... | <urn:uuid:a7858873-054d-46c0-8286-5073936c357e> | 3.734375 | 193 | Knowledge Article | Science & Tech. | 49.06 | 1,712 |
Severe ozone air pollution in the Persian Gulf region
1Energy, Environment and Water Research Centre, The Cyprus Institute, 20 Kavafi Street, 1645 Nicosia, Cyprus
2Max Planck Institute for Chemistry, Becherweg 27, 55128 Mainz, Germany
3Observatoire Midi-Pyrénées, CNRS – Laboratoire d'Aérologie, 14 Avenue E. Belin, 3140... | <urn:uuid:ad1143d6-0e52-463b-8843-4f58014840d8> | 2.515625 | 286 | Academic Writing | Science & Tech. | 17.848368 | 1,713 |
Man-made pollution is helping to push the tropics northwards, research suggests.
The effect could impact weather and climate, making sub-tropical regions drier and creating wetter and stormier conditions further north.
Scientists already knew that the tropics have been widening by around 0.7 degrees of latitude per dec... | <urn:uuid:a1cc9610-e191-4409-8354-868c1f25b2c3> | 3.8125 | 355 | News Article | Science & Tech. | 27.421923 | 1,714 |
A hailstone begins as a frozen raindrop or ice crystal. Strong updrafts of warm air and downdrafts of cool air move the frozen particle up and down through different levels of the storm cloud. The hailstone encounters different forms of moisture as it moves, and layers of frozen ice particles accumulate on its surface.... | <urn:uuid:07b2ab16-32ce-4e5d-86ec-d855b1af6ffa> | 2.828125 | 85 | Truncated | Science & Tech. | 52.258137 | 1,715 |
How has the sea ice that surrounds Antarctica varied over the period for which there exist comprehensive satellite data? In what follows, we review what has been learned about the subject -- in the order in which it was learned -- starting with the very first year of the current millennium.
Noting that "Antarctic sea i... | <urn:uuid:cd085c5e-c932-4186-a7bd-51a71a37e27c> | 3.078125 | 3,570 | Academic Writing | Science & Tech. | 55.11015 | 1,716 |
Under what circumstances might you use the yield method of the Thread class A. To call from the currently running thread to allow another thread of the same priority to run B. To call on a waiting thread to allow it to run C. To allow a thread of higher priority to run D. To call from the currently running thread with ... | <urn:uuid:14a8e7c1-ab5b-4c89-904f-79ceb1baec0f> | 2.8125 | 597 | Comment Section | Software Dev. | 72.534681 | 1,717 |
Recent upgrades to Boulder's wastewater treatment plant may have dramatically reduced the amount of chemicals in Boulder Creek that cause male fish to develop female characteristics, according to scientists at the University of Colorado.
Researchers first discovered a problem in the fish living below the wastewater tre... | <urn:uuid:273544bd-80fa-43cc-804b-f6c08e8b3d67> | 2.890625 | 672 | News Article | Science & Tech. | 44.390078 | 1,718 |
http://phys.org/news/2012-05-lemons-lem ... oxide.html
Making carbon-based products from CO2 is nothing new, but carbon dioxide molecules are so stable that those reactions usually take up a lot of energy. If that energy were to come from fossil fuels, over time the chemical reactions would ultimately result in more ca... | <urn:uuid:a890fe39-22cf-4902-a48a-6b2bd82f7809> | 4.125 | 192 | Comment Section | Science & Tech. | 46.941553 | 1,719 |
Skip to comments.NASA Rocket to Create Clouds Tuesday
Posted on 09/15/2009 6:25:43 PM PDT by Free ThinkerNY
A rocket experiment set to launch Tuesday aims to create artificial clouds at the outermost layers of Earth's atmosphere.
The project, called the Charged Aerosol Release Experiment (CARE), plans to trigger cloud ... | <urn:uuid:4764a0db-a1f4-4608-bb23-d0a63c6db88e> | 3.46875 | 856 | Comment Section | Science & Tech. | 59.388515 | 1,720 |
NASA, along with other international space agencies, seem to be pretty good at putting things into Earth’s orbit, but they are not so good when it comes to bringing things down. As a result, Earth’s orbit has been cluttered with space junk which has put other spacecraft, include those which are manned, in danger of a p... | <urn:uuid:2da540aa-c7c5-4423-b159-5eeae56a31e0> | 4.1875 | 403 | News Article | Science & Tech. | 47.094091 | 1,721 |
Fission Tracks in Zircons: Evidence for Abundant Nuclear Decay
by Andrew A. Snelling, Ph.D.
RATE II: Radioisotopes and the Age of The Earth: Results of a Young-Earth Creationist Research Initiative, (Volume II), L. Vardiman et al., eds. (San Diego, CA: Institute for Creation Research and the Creation Research Society, ... | <urn:uuid:22ca927c-1c33-4ed7-9774-2658e5b50280> | 3.46875 | 804 | Academic Writing | Science & Tech. | 26.266509 | 1,722 |
Simple Equations Introduction to basic algebraic equations of the form Ax=B
⇐ 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.
- Let's say we have the equation seven times x is equal to fourteen.
- Now b... | <urn:uuid:0fd4521c-d6c5-4976-a39e-6b54d6f49c8b> | 4.8125 | 2,935 | Truncated | Science & Tech. | 84.041077 | 1,723 |
In this module we need to be a little bit more precise about temperature and heat energy than we have been so far. Heat energy is usually measured in terms of calories. The calorie was originally defined as the amount of energy required to raise one gram of water one degree Celsius at a pressure of one atmosphere. This... | <urn:uuid:a815ae2f-316e-4506-a921-7c7a166c371c> | 4.15625 | 363 | Tutorial | Science & Tech. | 50.643539 | 1,724 |
Four hundred years ago, Galileo Galilei changed the world by peering through a 3-foot-long telescope and spying the moons of Jupiter. Today, the world — or, more accurately, our collection of worlds — is on the brink of a change that could be just as dramatic.
Over the next five years, giant telescopes and far-seeing s... | <urn:uuid:f0289409-9c06-41cf-9d2d-0397741816ec> | 3.53125 | 2,080 | News Article | Science & Tech. | 46.21081 | 1,725 |
USING a giant magnetic field, scientists at the University of Nottingham and the University of Nijmegen in the Netherlands have made a frog float in mid-air.
The levitation trick works because giant magnetic fields slightly distort the orbits of electrons in the frog's atoms. The resulting electric current generates a ... | <urn:uuid:00e22c8c-93ca-4955-a9a2-776a0dfdcf69> | 3.484375 | 194 | Truncated | Science & Tech. | 49.86859 | 1,726 |
Having survived for over 200 million years, some turtle species are now threatened with extinction because they get caught in fishing nets. Martin Lenhardt at the Virginia Institute of Marine Science has worked with turtles accidentally netted in Chesapeake Bay, and found a way to save them (WO 01/17119). Turtles have ... | <urn:uuid:3400eb8f-5dd1-497e-a938-42527a362dd0> | 4.15625 | 171 | Truncated | Science & Tech. | 46.26 | 1,727 |
These functions can be used to interrogate the status of an existing database connection object.
Tip: libpq application programmers should be careful to maintain the PGconn abstraction. Use the accessor functions described below to get at the contents of PGconn. Reference to internal PGconn fields using libpq-int.h is ... | <urn:uuid:16a93ea5-75a9-48b7-8762-475dbc980077> | 2.578125 | 1,825 | Documentation | Software Dev. | 41.450206 | 1,728 |
Mar. 19, 1998 WEST LAFAYETTE, Ind. -- Purdue University researchers have developed a new class of materials that has a wide variety of potential applications, from a coating to repel liquids to a membrane that could be used in wastewater treatment and drug delivery.
The materials are called co-polymer networks, which a... | <urn:uuid:491a5b02-dc92-47fd-9ab7-74fe8390cf80> | 3.046875 | 907 | News Article | Science & Tech. | 31.704733 | 1,729 |
Feb. 7, 2002 WEST LAFAYETTE, Ind. — A detailed look at a syringe-like structure designed to inject viral DNA into a host cell reveals a unique and complex entry scheme for viruses.
The study may provide clues to how similar viruses infect cells and suggest ways for developing a new class of antibiotics and other drugs ... | <urn:uuid:9bc5958e-0f03-439a-bbe4-ffc43310902d> | 3.8125 | 1,253 | News Article | Science & Tech. | 39.944947 | 1,730 |
Apr. 17, 2012 Researchers from the Complutense University of Madrid (UCM, Spain) have mathematically shown that particles charged in a magnetic field can escape into infinity without ever stopping. One of the conditions is that the field is generated by current loops situated on the same plane.
At the moment this is a ... | <urn:uuid:04d12ec3-49ea-401c-965b-839439819452> | 3.53125 | 588 | News Article | Science & Tech. | 41.440896 | 1,731 |
Oct. 25, 2012 Japan's "triple disaster," as it has become known, began on March 11, 2011, and remains unprecedented in its scope and complexity. To understand the lingering effects and potential public health implications of that chain of events, scientists are turning to a diverse and widespread sentinel in the world'... | <urn:uuid:07ac73c1-a9d5-4499-b883-960463833692> | 3.875 | 656 | Truncated | Science & Tech. | 35.690478 | 1,732 |
Nov. 19, 2012 Sound waves are commonly used in applications ranging from ultrasound imaging to hyperthermia therapy, in which high temperatures are induced, for example, in tumors to destroy them. In 2010, researchers at Caltech led by Chiara Daraio, a professor of aeronautics and applied physics, developed a nonlinear... | <urn:uuid:55ec35e0-c3ef-42e1-883e-568dd27c08ef> | 3.546875 | 582 | Truncated | Science & Tech. | 28.985489 | 1,733 |
Nov. 21, 2012 For the first time, researchers tracking the behavior of emperor penguins near the sea have identified the importance of sea ice for the penguins' feeding habits. The research, published November 21 in the open access journal PLOS ONE by Shinichi Watanabe from Fukuyama University, Japan and colleagues, Ja... | <urn:uuid:06a324b2-9b3d-4bd5-ab58-a18398c0a311> | 3.765625 | 329 | News Article | Science & Tech. | 45.127831 | 1,734 |
In a previous article, we laid out the framework for using OS X in Web development. With more than 60% of the world’s Web servers running Apache, having the same local, database-driven development environment can accelerate Web development, design and testing. In this piece, we will tackle getting an OS X systems confi... | <urn:uuid:ddd82b05-0ae1-49d1-b80a-59dd58e0eb8e> | 2.78125 | 1,091 | Tutorial | Software Dev. | 53.580932 | 1,735 |
VOICE: The oceans are the Earth’s single largest absorbers of carbon dioxide. But they are being overloaded by humans’ CO2 emissions. The result: acidification, with catastrophic consequences.
Yves Paccalet - Renowned French writer, philosopher and environmentalist (M): If the acidification of the ocean continues as it... | <urn:uuid:46bddbb0-3eb0-456f-a7a4-28cdce5d724a> | 3.25 | 610 | Content Listing | Science & Tech. | 42.841746 | 1,736 |
June 18, 2012
Wind socks, bow shocks, shockwaves and collisions are often used to describe the phenomena that create high-frequency electromagnetic radiation in the cosmos.
From gamma rays down through X-rays and extreme ultraviolet, conventional theories have relied upon gravity and acceleration as the only way for th... | <urn:uuid:b870ee67-e472-453c-bd62-0a0f3653ee54> | 3.703125 | 654 | Truncated | Science & Tech. | 38.268276 | 1,737 |
Prof. Michael Mauel, Columbia University
"Bringing the Stars to Earth: The Path to Fusion Power"
Abstract: A grand challenge of applied physics is to use our scientific know-how of plasma physics to achieve one of the world’s most important technical goals: a source of energy that is clean, safe, and available for thou... | <urn:uuid:f033c5df-3f5e-4a46-9243-320ccd09263c> | 2.765625 | 703 | About (Org.) | Science & Tech. | 36.36158 | 1,738 |
A curve of radius 138 m is banked at an angle of 11°. An 762-kg car negotiates the curve at 82 km/h without skidding. Neglect the effects of air drag and rolling friction. Find the following.
(a) the normal force exerted by the pavement on the tires
(b) the frictional force exerted by the pavement on the tires
(c) the ... | <urn:uuid:b19e6075-eff6-45c4-8e41-d7c621e69ae2> | 3.25 | 95 | Tutorial | Science & Tech. | 67.785223 | 1,739 |
I could have hoped that humanity would have learned the lesson that we know very little about the marine environment.
Over the last twelve months we have realized that a species of river dolphins is in fact two (see our section on river dolphins). When politicians tell us that there is 'X amount of cetaceans', often la... | <urn:uuid:a3092ee6-909b-467c-8d1d-ff6cf9b3fe72> | 3.4375 | 286 | News (Org.) | Science & Tech. | 49.446266 | 1,740 |
Last week's announcement of the discovery of a new particle seemed to answer one of the great outstanding questions in physics. But for those who haven't been immersed in all things LHC, the results were likely to raise all sorts of new questions (along with "what was all the fuss about again?"). So, to help navigate t... | <urn:uuid:774c0b9f-f635-4705-8028-03beced576be> | 3.3125 | 1,850 | Q&A Forum | Science & Tech. | 55.928429 | 1,741 |
Michigan State University Libraries Home
News about environmental studies resources or events provided by the MSU Libraries. For more information visit the Environmental Studies Resources web page or contact Jon Harrison at firstname.lastname@example.org
|« Economic Valuation/Impact of Green Infrastructure Assets and C... | <urn:uuid:cef19b3f-0e30-43f7-9218-65bc4891124d> | 2.515625 | 380 | News (Org.) | Science & Tech. | 10.900358 | 1,742 |
February 22, 2013 | 7
It’s often said that we know less about the bottom of our own ocean than we do about the surface of Mars. The governments of the world, and our government in particular, seem presently much less than enthusiastic about exploring the oceans of our own planet than in exploring other planets (ocean r... | <urn:uuid:c0c7d76f-eec5-4902-9424-f8648a65119f> | 3.546875 | 1,025 | Personal Blog | Science & Tech. | 38.088091 | 1,743 |
CHIPS Questions and Answers
Why is it important to study diffuse emission in the CHIPS wavelength band?
The CHIPS band contains the significant majority of the radiated
power from diffuse hot interstellar plasma in its most probable
temperature range. Although X-ray and UV studies can detect plasma
at greater distances... | <urn:uuid:0254edb6-e188-47cc-bb24-882783208225> | 2.859375 | 555 | FAQ | Science & Tech. | 27.652221 | 1,744 |
Family: Dipluridae, Funnelweb Mygalomorphs view all from this family
Description 1/8" (3-5 mm). Tan to yellowish-brown to reddish-brown, hairy. Large body. Belongs to the group of primitive spiders commonly called tarantulas. Constructs tube-shaped webs.
Habitat Mature coniferous (spruce-fir) forest.
Range Southern App... | <urn:uuid:d7ea8be6-59d4-4342-bb2e-f04a598588b4> | 2.734375 | 265 | Knowledge Article | Science & Tech. | 44.725 | 1,745 |
A New Kind of Neutrino Transformation
ESnet Helps Scientists Discover How Neutrinos Flavor-shift
March 8, 2012
Neutrinos, the wispy particles that flooded the universe in the earliest moments after the Big Bang, are continually produced in the hearts of stars and other nuclear reactions. Untouched by electromagnetism, ... | <urn:uuid:538dfd2d-5377-4533-b50b-269bf5c070ee> | 3.265625 | 1,577 | News (Org.) | Science & Tech. | 28.693091 | 1,746 |
1 Streams and lazy evaluation (40 points)
We know that comparison sorting requires at least O(n log n) comparisons where were are sorting n elements. Let’s say we only need the first f(n) elements from the sorted list, for some function f. If we know f(n) is asymptotically less than log n then it would be wasteful to s... | <urn:uuid:67b304b1-c964-4636-a74b-4a0ce25fa1ba> | 3.53125 | 876 | Q&A Forum | Software Dev. | 78.829554 | 1,747 |
August 10, 2009 - First Black Holes Born Starving
-- return to Press Releases --
Date Issued: August 10, 2009
Relevant Web URLs:
Menlo Park, Calif.—The first black holes in the universe had dramatic effects on their surroundings despite the fact that they were small and grew very slowly, according to recent supercomput... | <urn:uuid:27ced233-6745-4967-8a8e-31e5f258e20a> | 3.890625 | 1,124 | News (Org.) | Science & Tech. | 33.451729 | 1,748 |
Pub. date: 2008 | Online Pub. Date: April 25, 2008 | DOI: 10.4135/9781412963893 | Print ISBN: 9781412958783 | Online ISBN: 9781412963893| Publisher:SAGE Publications, Inc.About this encyclopedia
Impacts of Global Warming
IMPACTS FROM THE phenomenon known as global warming include environmental, social, and economic eff... | <urn:uuid:e9b9663e-a503-4a1d-b284-16f1447bf5b3> | 3.9375 | 252 | Content Listing | Science & Tech. | 30.482857 | 1,749 |
Data and Information
- Data Initiatives
- Satellite Sensing Systems
Data Systems for LCLUC Research
The unprecedented large volumes of data for land use research have necessitated the development of innovative data processing, delivery and analysis systems. The evolving EOS Data and Information System and a number of c... | <urn:uuid:0832943e-4a93-4733-a5ed-ae1b0838fa4b> | 2.953125 | 1,672 | Knowledge Article | Science & Tech. | 16.175007 | 1,750 |
[APIA, Samoa] Pacific Island researchers will be trained in skills such as coastal hazard mapping as part of a programme to use science to make coastal communities safer and more resilient.
The US$1.3-million programme is part of an expansion of the US National Oceanic and Atmospheric Administration (NOAA) Coastal Stor... | <urn:uuid:ac87d2c8-0111-42c9-b4a1-7033e8a67f62> | 2.703125 | 512 | News Article | Science & Tech. | 23.919186 | 1,751 |
Books, Software, Resources, DVDs to Learn Math
Steps to Doing Well in Math
Here are some quick steps to help you get better at doing mathematics. Regardless of age, the tips here will help you learn and understand math concepts from primary school right on through to university math. Everyone can do math, be positive a... | <urn:uuid:84cb15a4-32c1-4e38-885b-48395a6f11f6> | 2.671875 | 235 | Content Listing | Science & Tech. | 65.793925 | 1,752 |
ok but then il try say for x=1 and y=2
i find f(x+y) not equal to f(x)+f(y) which makes 10 not equal 14. so this is not linear also? can someone give me an example of a linear function that works.
......... wait so the these properties cannot be satisfied if there is a constant, but i thought a linear function could be... | <urn:uuid:54ca889c-bbbd-4038-93d3-5cd0cb2dc9f0> | 2.984375 | 167 | Q&A Forum | Science & Tech. | 96.373957 | 1,753 |
VN_LOCK(9) BSD Kernel Manual VN_LOCK(9)
vn_lock - acquire the vnode lock
#include <sys/types.h> #include <sys/vnode.h> int vn_lock(struct vnode *vp, int flags, struct proc *p);
The vn_lock() function is used to acquire the vnode lock. Certain file system operations require that the vnode lock be held when they are call... | <urn:uuid:772be54a-171a-44da-b292-d90bc16813fe> | 2.78125 | 753 | Documentation | Software Dev. | 63.89699 | 1,754 |
Researchers at the research center QUANTOP at the Niels Bohr Institute at the University of Copenhagen (Denmark) have constructed an atomic magnetometer, which has achieved the highest sensitivity allowed by quantum mechanics. Sensitive magnetometers could be used to measure electrical activity in the human brain and h... | <urn:uuid:072c2532-5096-4207-949b-33b92ba97dc8> | 3.265625 | 596 | News Article | Science & Tech. | 18.44798 | 1,755 |
This project’s official title is "Ocean-Ice Interaction in the Amundsen Sea: the Keystone to Ice-Sheet Stability". A real mouthful, but it captures the essence of what we intend to do, where we will do it and why we feel it is important to do it. Various other measurements have captured the West Antarctic ice sheet cha... | <urn:uuid:900665d2-8d56-4e20-9d75-1e65e9cf1ef9> | 3.546875 | 549 | About (Org.) | Science & Tech. | 49.198226 | 1,756 |
August 20, 2010
Today’s exercise is about a relatively new sorting algorithm. We start with an article Optimizing Your Wife by Kevin Brown, which proposes that the best way for a man to find a wife is to decide how many women he is willing to date before he chooses a wife, we’ll call that N, determine which of the firs... | <urn:uuid:685b7a69-20a9-497c-bd58-d99147971095> | 2.8125 | 413 | Personal Blog | Software Dev. | 52.838098 | 1,757 |
Joint Dark Energy Mission
Program(s):Physics of the Cosmos
Take all the stars, all the planets and everything we can see and detect with telescopes and add them all up. That total will represent only four percent of the universe. If the universe came with a list of ingredients, the ordinary atoms that make up stars, tr... | <urn:uuid:10f4ebc8-b117-4520-97c1-1fb72c8a00ff> | 3.984375 | 469 | Knowledge Article | Science & Tech. | 36.779451 | 1,758 |
In your interface, you can formally declare an instance variable between the braces, or via @property outside the braces, or both. Either way, they become attributes of the class. The difference is that if you declare @property, then you can implement using @synthesize, which auto-codes your getter/setter for you. The ... | <urn:uuid:24048d95-d148-4d17-ba10-aeaa0134da31> | 2.734375 | 492 | Q&A Forum | Software Dev. | 39.561107 | 1,759 |
I am going through Effective Java and some of my things which I consider as standard are not suggested by the book, for instance creation of object, I was under the impression that constructors are the best way of doing it and books says we should make use of static factory methods, I am not able to few some advantages... | <urn:uuid:ec7eb7c4-ee94-46d6-b3a6-a8c0f1b8f37d> | 2.953125 | 301 | Q&A Forum | Software Dev. | 27.404821 | 1,760 |
A "domain specific language" is one in which a class of problems (or solutions to problems) can be expressed succinctly, usually because the vocabulary aligns with the that of the problem domain, and the notation is similar (where possible) to that used by experts that work in the domain.
What this really means is a gr... | <urn:uuid:2d9b3ae0-6feb-41db-8372-2afec1a10b90> | 2.796875 | 235 | Q&A Forum | Software Dev. | 44.52 | 1,761 |
Today, a global warming progress report. The University of Houston's College of Engineering
presents this series about the machines that make our civilization
run, and the people whose ingenuity created them.
When I face questions about global warming, it's
usually a struggle to point out that the problem must be kept ... | <urn:uuid:20e81113-3097-40a1-b921-c35da330d771> | 3.125 | 840 | Nonfiction Writing | Science & Tech. | 57.711664 | 1,762 |
How horrid? July on pace to be hottest month on record
The USA is closing in on its hottest month in recorded history.
With five days to go in July, preliminary data show that the heat could top records set decades ago: "The warmest July for the contiguous U.S. was in 1936, when the nationally averaged temperature was ... | <urn:uuid:2fab5114-c8fa-4f7c-a9a5-96bdb94a26ab> | 3.09375 | 478 | News Article | Science & Tech. | 57.063403 | 1,763 |
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What are types convergent boundaries?
How does a convergent b... | <urn:uuid:f65b929d-914c-418d-bb71-33bd71432b88> | 2.5625 | 146 | Comment Section | Science & Tech. | 43.519048 | 1,764 |
In quantum mechanics
Quantum mechanics, also known as quantum physics or quantum theory, is a branch of physics providing a mathematical description of much of the dual particle-like and wave-like behavior and interactions of energy and matter. It departs from classical mechanics primarily at the atomic and subatomic..... | <urn:uuid:516275b6-3f1a-40a3-a982-aa6176296f9e> | 3.390625 | 3,228 | Knowledge Article | Science & Tech. | 37.941987 | 1,765 |
ABOUT SNOWFLAKES: Snow is a form of precipitation. Rising warm air carries water vapor high into the sky, where it cools and condenses into water droplets. Some vapor freezes into tiny ice crystals, which can attract cooled water drops to form snowflakes. As snowflakes fall, they may meet warmer air and melt into raind... | <urn:uuid:a0e37488-f43a-4545-b743-364b9bb57970> | 3.890625 | 366 | Knowledge Article | Science & Tech. | 31.530721 | 1,766 |
Distances in the Solar System are very large! To compare the average distances between the Sun and the planets, it's convenient to do it in terms of the average Earth-Sun separation.
A very useful approximate definition of the astronomical unit (AU) is:
1 AU = average distance between Sun and Earth = 1.496 × 108km
More... | <urn:uuid:7b513601-de99-4e61-a84c-da82145da4ff> | 3.59375 | 145 | Knowledge Article | Science & Tech. | 52.525 | 1,767 |
Here’s what it looks like:
// Example One function triangle(a,b): function sqroot(x): return Math.pow(x,.5) return sqroot( a*a + b*b )
// Example Two for var i=0; i<5; i++: var el = document.getElementById("el"+i) if count % 2 == 0: el.innerHTML = "Hello" else: el.innerHTML = "World"
// Pyscript function triangle(a,b):... | <urn:uuid:370d635e-183f-4543-af68-b4c2b8b98c70> | 2.515625 | 271 | Tutorial | Software Dev. | 88.747725 | 1,768 |
BNL Chemistry Department | Photo- and Radiation Chemistry | Group Members
|LEAF Facility Layout||LEAF System Components||Features of LEAF||LEAF Publications|
Research Highlights from LEAF:
Ionic Liquids: Designer Solvents for a Cleaner World (PDF)
Storing Energy in Dendrimer Trees: Stabilizing Charge Separation in Dend... | <urn:uuid:86cf4627-65a2-4aae-a305-5eb078ad91e4> | 2.859375 | 653 | About (Org.) | Science & Tech. | 28.870647 | 1,769 |
Japan’s Nuclear Crisis Explained: A Sampler
The crippled Fukushima nuclear plant as of March 15, 2011. Credit: daveeza/flickr
Difficult though it is to believe, the massive earthquake and tsunami that devastated northeast Japan happened less than a week ago. It would have been even harder to believe, when the first dam... | <urn:uuid:3da25c8d-04b8-4a2c-90a0-e40a58717678> | 3.234375 | 534 | Personal Blog | Science & Tech. | 42.601633 | 1,770 |
SANTA CRUZ — Hopping on a bumper car and setting the GPS destination to outer space, "Toy Story" character Buzz Lightyear would have been thrilled by a scene at the Santa Cruz Beach Boardwalk.
A Science Channel TV crew and UCSC Astronomy Professor Greg Laughlin were equally excited Friday morning, using the Speed Bump ... | <urn:uuid:0cb4af77-6504-4419-b9df-d063482f445c> | 2.75 | 695 | News Article | Science & Tech. | 58.682028 | 1,771 |
Threats to Frogs
One of the most pressing threats to frogs today is the chytrid fungus, a deadly skin fungus that has moved across the globe causing amphibian declines in Australia, South America, North America, Central America, New Zealand, Europe, and Africa killing frogs by the millions. The chytrid fungus is respon... | <urn:uuid:41cc0e52-1089-47c4-b367-00aac24e3935> | 4 | 408 | Knowledge Article | Science & Tech. | 35.836035 | 1,772 |
||This article may be too technical for most readers to understand. (May 2011)|
Properties of magnetic materials change with temperature. In physics and materials science, the Curie temperature (Tc), or Curie point, is the temperature where a material's permanent magnetism changes to induced magnetism, or vice versa. T... | <urn:uuid:f97fa1c0-16d4-40c6-8a1f-0f8a38f52922> | 4.21875 | 6,772 | Knowledge Article | Science & Tech. | 37.061098 | 1,773 |
Creature Spotlight of the Week- OrcaBY EARTHFIRST
The killer whale which is commonly referred to as the orca is a toothed whale belonging to the oceanic dolphin family. Killer whales are found in all oceans, from the freezing Arctic and Antarctic regions to tropical seas. Killer whales as a species have a diverse diet ... | <urn:uuid:2c91a7e2-624f-4f8f-a586-14d6382e9f2f> | 3.546875 | 241 | Knowledge Article | Science & Tech. | 42.82976 | 1,774 |
Temperature change in the Alps and their sub-regions according to different emission scenarios
: Nov 12, 2009
: Oct 02, 2009
: Nov 29, 2012 11:37 AM
Regional statistics: G = Greater Alpine Region, A = Alps, NW = north-western Alps, NE = northeastern Alps, SW = southwestern Alps, SE = southeastern Alps, H = higher than ... | <urn:uuid:5d4224fb-e395-40ef-b54b-d998b5cec6ba> | 2.625 | 129 | Content Listing | Science & Tech. | 26.97122 | 1,775 |
A Tale of Two Lakes:
One Gives Early Warning Signal
for Ecosystem Collapse
First experimental evidence that radical
ecosystem change can be detected in advance
Researchers eavesdropping on complex signals from a remote Wisconsin lake have detected what they say is an unmistakable warning--a death knell--of the impendin... | <urn:uuid:675a3561-119c-42cd-ba4c-f6d6aefaa02f> | 3.21875 | 1,387 | News (Org.) | Science & Tech. | 28.616294 | 1,776 |
The prime objective of the EUMETSAT Polar System (EPS) Metop mission series is to provide continuous, long-term datasets, in support of operational meteorological and environmental forecasting and global climate monitoring.
The EPS programme consists of a series of three polar orbiting Metop satellites, to be flown suc... | <urn:uuid:dbeaa8e1-28c8-4344-ba39-ae853c6d913a> | 3.1875 | 1,132 | About (Org.) | Science & Tech. | 18.763561 | 1,777 |
C14 - The Double Cluster
Algol - Eclipsing Binary Star
Perseus lies along the plane of the Milky Way, but as we view it, we are looking away from the galactic centre, so that there are fewer clusters within its boundaries than when looking towards Sagattarius or Scorpius. However, the two clusters that form the Perseus... | <urn:uuid:d4face32-c368-4fdf-a8be-4dc11dd9121c> | 3 | 890 | Knowledge Article | Science & Tech. | 60.366302 | 1,778 |
LOS ANGELES (December 3, 2012)--NASA's well-traveled Voyager 1 spacecraft is in a new region at the edge of the solar system and is close to exiting it forever.
Scientists call the region the "magnetic highway" and say it's the last stop before interstellar space, or the space between stars.
The findings were presented... | <urn:uuid:85ae5109-16c4-4a23-a3cc-9c6f25722d19> | 3.390625 | 168 | News Article | Science & Tech. | 54.597853 | 1,779 |
Lesser Long-nosed Bats:
Nectar-powered Bat Math!
Counting the Calories in Cactus
Contributed by Ginny Dalton, Bat Biologist
Merlin D. Tuttle,BCI
ever wonder: How much energy does it take to operate a bat? How many
flowers must a bat visit to stay alive?
Get ready to count the calories in a cactus flower! After reading ... | <urn:uuid:21b711b3-73d7-4ee0-8113-2f9006242494> | 3.109375 | 1,359 | Tutorial | Science & Tech. | 69.242251 | 1,780 |
For a transaction to take place between a client and a server, a conversation must be established. A conversation is established when a client makes a request by broadcasting a service name and topic name, and a server responds. Transactions can then take place across the conversation. When no more transactions are to ... | <urn:uuid:ab27fc5f-2d86-45bb-8493-e416cd46d33e> | 3.46875 | 247 | Documentation | Software Dev. | 42.490322 | 1,781 |
Moon Crater Shapes
Date: 1999 - 2000
The craters on the moon are obviously round but
impacts with a grazing incidence should leave a V shaped crater. I would think that some percentage of the impacts would be at shallow angles of attack but this does not appear to be the case in photos.
Have they discovered such crater... | <urn:uuid:b485f2c8-49c9-4268-91c3-d88b5c45c43b> | 4.15625 | 299 | Comment Section | Science & Tech. | 53.441538 | 1,782 |
Northern Research Station
11 Campus Blvd., Suite 200
Newtown Square, PA 19073
(610) 557-4132 TTY/TDD
Title: Carbon stocks in urban forest remnants: Atlanta and Baltimore as case studies. Chapter 5.
Author: Yesilonis, Ian D.; Pouyat, Richard V.
Publication: Dordrecht, Netherlands: Springer: 103-120.
Key Words: urban, fo... | <urn:uuid:3f7c389f-7d96-446d-960d-7c8cbbc49b80> | 2.53125 | 400 | Academic Writing | Science & Tech. | 53.873 | 1,783 |
The Law of Momentum Conservation
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 the topic of momentum and collisions.
Enjoy a rich source of instructional, demonstration and lab idea... | <urn:uuid:9b183fd2-00c9-493b-8c99-e1c8a1a5edc9> | 3.9375 | 2,390 | Tutorial | Science & Tech. | 60.538752 | 1,784 |
|Jul29-06, 08:44 AM||#1|
Question on light intensity at the focus of a lens.
From using a magnifying lens under the Sun, I gather it can focus all or most of the light impinging on its surface area to a small spot and that is how it is able to create a greater intensity light at its focus (disregarding absorption in th... | <urn:uuid:32929577-cba4-4fdd-b572-8d2fe897b09f> | 3.546875 | 753 | Comment Section | Science & Tech. | 62.022674 | 1,785 |
It is possible to create a database in a location other than the default location for the installation. Remember that all database access actually occurs through the database backend, so that any location specified must be accessible by the backend.
Alternate database locations are created and referenced by an environm... | <urn:uuid:4191b499-f693-4227-86f5-5a43cc1a32f4> | 2.828125 | 541 | Documentation | Software Dev. | 10.114863 | 1,786 |
Scientists study the illusive snow leopard in Northern Afghanistan (The New York Times)
- Snow leopards have the advantage of living in “one of the most remote and isolated mountain landscapes in the world,” away from the human threats other large cats face.
- Increasingly, snow leopards have been eating livestock, and... | <urn:uuid:5db0eaf8-dc27-4e80-b8f1-1935edb19e7d> | 3.125 | 437 | Content Listing | Science & Tech. | 27.048713 | 1,787 |
Feb. 24, 2011 Early in the formation of Earth, some forms of the element chromium separated and disappeared deep into the planet's core, a new study by UC Davis geologists shows.
The finding, to be published online by the journal Science Feb. 24, will help scientists understand the early stages of planet formation, sai... | <urn:uuid:2a280e92-62de-4bc5-a2cd-327af6dbcf52> | 3.640625 | 540 | News Article | Science & Tech. | 43.358771 | 1,788 |
This Chandra image shows two vast cavities - each 600,000 light years in diameter - in the hot, X-ray emitting gas that pervades the galaxy cluster MS 0735.6+7421 (MS 0735 for short). Click here for a high resolution photograph.
Astronomers have found the most powerful eruption in the universe using NASA's Chandra X-ra... | <urn:uuid:b46d216e-f498-4b36-b9c9-1b53fc9ec451> | 3.5 | 831 | News Article | Science & Tech. | 47.701119 | 1,789 |
Composition of Solutions
Problems and Solutions
Calculate the volume of a 0.753 M sodium hydroxide solution that is neutralized by the addition of 100 mL of a 1.203 M sulfuric acid solution.
If the volume of a 100 L solution of 1.1 moles of hydrogen in 6.0 moles argon is suddenly doubled, what happens to the mole fract... | <urn:uuid:8bcee731-1a98-4d6f-a6e6-b9a1474d0e87> | 2.703125 | 127 | Tutorial | Science & Tech. | 76.5535 | 1,790 |
Jeanna Bryner LiveScience Staff Writer LiveScience.comWed Mar 21, 4:30 PM ET
The fossil of an ancient amphibious reptile with a crocodile's body and a fish's tail has been unearthed in Oregon. Scientists believe the creature's remains were transported by geologic processes nearly 5,000 miles away from where it original... | <urn:uuid:8ac6ce54-16e9-4a3b-a93c-d6805e297bb6> | 3.46875 | 206 | Comment Section | Science & Tech. | 34.538077 | 1,791 |
The ground in the Puget Sound region didn’t just shake during the magnitude 6.8 Nisqually earthquake, it moved — literally.
In fact, measurements using global positioning system (GPS) data indicate that in most areas the ground shifted more during the Feb. 28 quake than it normally does in a year.
“Not only that, but i... | <urn:uuid:d2a62db1-8700-4b57-bbc9-b01694e1d91d> | 3.109375 | 840 | News Article | Science & Tech. | 49.829574 | 1,792 |
WebRef Update: Featured Article: X(ML) Marks the Spot
X(ML) Marks the Spot
Never before has an Internet development witnessed such rave reviews before thorough implementation and testing as the eXtensible Markup Language (XML). XML is definitely the latest buzzword in the developer community. However, you must crawl be... | <urn:uuid:f2be1028-3e4e-4f08-8e06-dbf40b98a018> | 3.140625 | 1,209 | Truncated | Software Dev. | 67.677158 | 1,793 |
Forecast an El Nino or La Nina!
|You can see if an El Nino or a La Nina is coming!|
|Who hasn't heard of El Nino and la Nina? Almost no one! But who can tell if one of these events that change our weather and climate is coming. Scientists are working to forecast El Nino and La Nina events but as yet our best way to tel... | <urn:uuid:64c95389-69c4-4e78-a832-cba6209b2e46> | 3.734375 | 996 | Tutorial | Science & Tech. | 68.224935 | 1,794 |
Fixing Potholes with Non-Newtonian Fluid
potholes? Forget waiting around for 5 road workers to stand around and watch
while one guy fills the pothole with asphalt! Just grab a bit of non-Newtonian
fluid and, there – you fixed it:
The students, undergraduates at Case Western Reserve University
in Cleveland, devised the ... | <urn:uuid:5af6453b-641b-45b8-a8d0-06568ad68016> | 3.015625 | 289 | Truncated | Science & Tech. | 54.622506 | 1,795 |
Today’s the big day, when Asteroid 2005 YU55 will pass within about 200,000 miles (and come slightly closer to the moon tomorrow) of our fair planet.
This closeness of the approach can be seen in the short movie below (click it to activate).
The very dark asteroid is estimated to measure about 400 meters across. Here’s... | <urn:uuid:b34240de-d4be-4df7-8f7e-a3dc08b94b51> | 3.4375 | 505 | Personal Blog | Science & Tech. | 58.808991 | 1,796 |
Solar Power May Be Getting More Flexible
A solar panel and a yoga mat not often appear in the same sentence. But future solar panels have been compared to mats as a new technology promises to deliver amazing flexibility and efficiency within five years.
According to a report on Boston.com, MicroContinuum, a company bas... | <urn:uuid:2bb1812a-6e0f-4577-a26d-42ab63c8d1fd> | 2.90625 | 301 | News Article | Science & Tech. | 24.297345 | 1,797 |
The world is watching Japan, which, in the wake of a devastating earthquake, is trying to prevent the total meltdown of multiple nuclear reactors.
Escaping radiation from the plants has created an ever-widening evacuation zone.
Will radioactivity from the plants reach the United States? Yes, it appears so. It may even ... | <urn:uuid:4b26685f-58dc-4a6b-874a-72037c7ef273> | 2.53125 | 313 | News Article | Science & Tech. | 58.677584 | 1,798 |
In some views SOA is represented as a series of 4 layers: Presentation Layer (SOA 1), Business Process Layer (SOA 2), Business Service Layer (SOA 3) and Technical Layer (SOA 4). Typically each layer higher up in the hierarchy consumes services exposed by the layer under it. So the Presentation Layer would consume servi... | <urn:uuid:50869c38-7c78-4fb3-b91b-907a7e2b0ca0> | 2.53125 | 705 | Documentation | Software Dev. | 34.949816 | 1,799 |