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 |
|---|---|---|---|---|---|---|---|
Proving ?R² Using Chains, a Ruler, and Sixty Seconds
In this brief video, Minute Physics shows a visual proof demonstrating why ?R² gets you the area of a circle. By using various lengths of chain laid into a circular shape, you can make a triangle from the circle -- and from there it's a hop, skip, and a trigonometry ... | <urn:uuid:cea8c368-52d2-4648-850c-f618deec2348> | 3.25 | 132 | Truncated | Science & Tech. | 68.671028 | 3,800 |
Bed of Nails in Humanoid Discovery.
Source: SciTech, Perth
Discover how different body systems and organs function.
Go on a journey through the human body! Discover how different body systems and organs function; from breathing to digestion, skin and hair, even how your brain works. Explore common misconceptions about ... | <urn:uuid:eb446d5e-790c-45ea-8e0f-f45f46a4918f> | 2.921875 | 104 | Product Page | Science & Tech. | 46.781683 | 3,801 |
The Universe Revealed by Subaru Telescope Ⅲ
The Milky Way and its Group
Our solar system belongs to a large spiral-shaped group of stars called the Milky Way Galaxy, which is about 100,000 light years across. The next nearest large galactic neighbor is the Andromeda Galaxy (M31), located 2.5 million light-years away. I... | <urn:uuid:165dc187-2b42-4695-a026-239367bb4b97> | 3.75 | 741 | Knowledge Article | Science & Tech. | 42.826174 | 3,802 |
Project Apollo might have been commissioned as a feel good project to boost the morale of a bruised superpower, but it was conceived as a piece of pure scientific exploration.
In his final essay marking the 40th anniversary of Apollo 11 - which launched on 16 July 1969 - Dr Christopher Riley looks back at the part scie... | <urn:uuid:1afe904d-750a-45c1-a738-16aa4c094025> | 3.796875 | 1,186 | Nonfiction Writing | Science & Tech. | 39.473443 | 3,803 |
Q1 A common feature of all life on Earth is...
Q2 If extraterrestrials had visited Earth at some random time
between the Earth's formation and now, what kind of life forms would they
most likely have found
stone age humans
humans with radio telescopes
dinosaurs and insects
Q3 Which of the following ideas is NOT being d... | <urn:uuid:7a9e56ea-9b69-4ba5-be0e-68d862ede046> | 3.15625 | 1,432 | Q&A Forum | Science & Tech. | 47.66488 | 3,804 |
My question is driven by the plot below. We see that acceptable operating range of a motor is between 50-100% of the rated load. Below 40% or so the efficiency of the motor drops off dramatically.
What is the cause of this phenomenon?
First, efficiency of an electric motor is just output power divided by input power. I... | <urn:uuid:d992cc07-cfe0-4cef-94bf-f0719f8d6f04> | 2.890625 | 299 | Q&A Forum | Science & Tech. | 62.148702 | 3,805 |
One of the unwritten rules of physics says you can't get something for nothing; at best, you can manage a fair exchange rate between how much energy you pump into a system and how much you coax out of it.
Consider your car: On average, only 12.6 percent of the chemical energy you pump in at $3.50-plus (or whatever you ... | <urn:uuid:9d6f0d52-ccc7-40c4-a4aa-856701c7b98d> | 3.515625 | 669 | Knowledge Article | Science & Tech. | 47.217071 | 3,806 |
This is a re-creation of a Helicoprion, which lived 270 million years ago and is the only animal ever with a complete 360-degree spiral of teeth.
By Jennifer Viegas
The world’s only animal, past or present, with a complete 360-degree spiral of teeth was Helicoprion, which sliced into prey like a buzzsaw.
This sharklike... | <urn:uuid:6306e161-1cf6-4e4e-82f6-783491df7386> | 3.796875 | 909 | News Article | Science & Tech. | 36.668214 | 3,807 |
As the autumn leaves turn handsomely, I’ve been wondering, why do trees bother? It’s a question scientists have been asking for the past few years, and for the first time, they’ve carried out an experiment to find out.
The color of an autumn leaf can actually take a lot of work. In the fall, the green chlorophyll in a ... | <urn:uuid:36c93807-1fc9-496d-804a-42b70f0b157b> | 3.890625 | 1,103 | Personal Blog | Science & Tech. | 60.361702 | 3,808 |
There is almost universal agreement in the scientific community that climate change will be a critical environmental issue in the 21st century. Climate change is already affecting North Carolina's weather-dependent industries, tourism, wildlife habitats, natural landscapes, and even changing the seasons themselves. If ... | <urn:uuid:57551608-4eb8-43e2-b146-1441c7b9499a> | 3.578125 | 411 | About (Org.) | Science & Tech. | 44.770552 | 3,809 |
Aron Asked: When does the South Pacific start to light up and the water start to warm up? I froze my ass off today and welcome warmer waters and warmer swell.
Adam Wright – Solspot Forecaster:
You ask a good question…but it actually needs two answers.
It definitely seems like Southern Hemi swells and warmer water are l... | <urn:uuid:e95f4ab0-35f7-4422-8362-0f632c55c2e5> | 2.5625 | 651 | Personal Blog | Science & Tech. | 39.377034 | 3,810 |
Description of Heterolobosea:
Circumscription: Heterotrophic amoebas, amoebo-flagellates (collectively the vahlkampfiids or schizopyrenids), flagellates (Percolomonas), and slime moulds (the acrasids). Two genera have no flagellated stage, but the majority of species have the capacity to convert from amoebas to flagell... | <urn:uuid:8c0cf795-d4a1-4ff1-91c2-0f0251a6f00d> | 3.046875 | 371 | Knowledge Article | Science & Tech. | 3.471182 | 3,811 |
Typhoon Megi continues to intensify and is expected to be a significant threat to the northern Philippine province of Luzon by late this weekend. Americares is making preparations to bring relief. Typhoon Megi is currently the only tropical cyclone anywhere on earth but it could be one of the strongest of the year to a... | <urn:uuid:ad74824f-291a-4758-9c49-2612ab867296> | 2.546875 | 965 | Personal Blog | Science & Tech. | 52.131341 | 3,812 |
Academics at the Universities of Bristol, Yale and Calgary have shown that prehistoric birds had a much more primitive version of the wings we see today, with rigid layers of feathers acting as simple airfoils for gliding.
Close examination of the earliest theropod dinosaurs suggests that feathers were initially develo... | <urn:uuid:39e55209-472b-459e-aadb-ff17a8b1f023> | 4.4375 | 527 | Personal Blog | Science & Tech. | 30.803764 | 3,813 |
Featured Scientist: David G. McGrath, Ph.D. Associate Scientist
Project: Human ecology and management of the Amazon floodplain
The Amazon varzea, the core area of the Amazon floodplain, is one of the largest and most biodiverse tropical wetland systems in the world. Its fertile soils and abundant plant and animal resou... | <urn:uuid:e114fb30-3aae-4d7a-a28a-70f21b8499d0> | 3.484375 | 290 | Truncated | Science & Tech. | 20.016667 | 3,814 |
Return an integer file descriptor for the socket on which the server
is listening. This function is most commonly passed to
select.select(), to allow monitoring multiple servers in the
Process a single request. This function calls the following methods
in order: get_request(), verify_request(), and
process_request(). I... | <urn:uuid:c1538dff-d0e8-4236-b80b-884cbea0b839> | 3.125 | 712 | Documentation | Software Dev. | 52.68929 | 3,815 |
¨ is injective if and only if different inputs give different outputs.
¨ is injective if and only if “different elements of A go to different elements of B.”
¨ It is the whole function that is or is not injective.
¨ The articles about most of the example functions state whether they are injective or not. Checking each ... | <urn:uuid:0945305e-e17b-4cbc-a1e8-190848e4baef> | 3.6875 | 955 | Knowledge Article | Science & Tech. | 56.154743 | 3,816 |
|Auroras can make spectacular sights.
Photographed above last weekend, flowing multi-colored auroras helped
illuminate a busy sky above
spectacular aurora pictured above,
the photographer caught three satellites streaks, one airplane streak, and a
friend trying to
the same sight.
Although auroras might first appear to ... | <urn:uuid:96be8006-55fa-40d2-9626-aaf880566f45> | 3.34375 | 183 | Knowledge Article | Science & Tech. | 40.131936 | 3,817 |
Bryde's whale, tropical whale
Little is known about Bryde's whales and they are often confused with sei whales.
Possibly two (offshore and inshore), and maybe a third, dwarf subspecies around the Solomon Islands.
Up to 72 years.
Body length: 11.5-14.5m, Weight: 12-20 tonnes.
Bryde's whales are very similar to sei whale... | <urn:uuid:4c457cf7-6448-4213-9796-10e37353a09b> | 3.140625 | 211 | Knowledge Article | Science & Tech. | 71.667808 | 3,818 |
Aquatic Entomology: The Fishermen's Guide and Ecologists' Illustrated Guide to Insects and Their Relatives
Aquatic Biology and Natural History are subjects of interests to many, whether they be related to one's vocational education, one's avocation, or purely to one's appreciation for the living order of the world. Thi... | <urn:uuid:60f4780a-ac24-40f1-b4a1-752c8d7e6cb5> | 2.796875 | 770 | User Review | Science & Tech. | 49.801174 | 3,819 |
What's up with nanotech?
Ultrasmall wonders are opening big new frontiers, despite fading of the initial excitement
LOWELL — When the University of Massachusetts Lowell launched its nanotechnology center six years ago, scientists, engineers, and entrepreneurs were dreaming big dreams about small things, like miniature ... | <urn:uuid:438d2850-e346-4853-99a0-57a076aae588> | 2.78125 | 1,399 | News Article | Science & Tech. | 24.421306 | 3,820 |
Simply begin typing or use the editing tools above to add to this article.
Once you are finished and click submit, your modifications will be sent to our editors for review.
...diameter antenna near Effelsberg, Ger.; the Australian Commonwealth Scientific and Industrial Research Organization (CSIRO) 64-metre (210-foot)... | <urn:uuid:644fb2fb-944f-40a0-b7c3-63b1e8f222dc> | 3.203125 | 234 | Truncated | Science & Tech. | 43.767406 | 3,821 |
Global warming news and climate change headlines for March 2008
March 31 - Australia's love affair with cars cranks emissions
The Australian state of Victoria has experienced an overall carbon
emission increase of 12.6% since 1990 with transport associated
emissions being the major contributor, skyrocketing by 26.5% ov... | <urn:uuid:298bd6c7-3314-4b9c-acf7-aa2f30ab4334> | 2.765625 | 2,342 | Content Listing | Science & Tech. | 39.431632 | 3,822 |
I’ve put off writing about Wesley Traub’s paper on the frequency of planets in the habitable zone because I knew Adam Crowl had reservations about Traub’s method. We talked about this at the 100 Year Starship Symposium, which led to Adam’s agreeing to writing this piece for Centauri Dreams. How you define a habitable z... | <urn:uuid:45670bf4-28f3-406c-8aa2-6346ad57eae2> | 3.1875 | 1,509 | Nonfiction Writing | Science & Tech. | 60.382629 | 3,823 |
An overview of the Chandra mission and goals, Chandra's namesake, top 10 facts.
Classroom activities, printable materials, interactive games & more.
Overview of X-ray Astronomy and X-ray sources: black holes to galaxy clusters.
All Chandra images released to the public listed by date & by category
Current Chandra press... | <urn:uuid:6e2620be-99a1-41cf-914a-d5cc9916c018> | 3.140625 | 1,374 | News (Org.) | Science & Tech. | 40.845324 | 3,824 |
Kids want to know: What causes gravity?
Young visitors experiment with the effects of gravity on the moon, Earth and Jupiter in a hands-on interactive in the Gravity exhibition at the Adler Planetarium in Chicago.
Courtesy of Adler Planetarium
You wanted to know
Students in Elise Diaz's fifth-grade class at O'Plaine Sc... | <urn:uuid:d40b8183-95e6-49e7-950e-c7cadb354d57> | 3.515625 | 856 | News Article | Science & Tech. | 44.770576 | 3,825 |
This topic deserves special attention because many people from database designers to application developers (sometimes one person does both) do not get it right. A Many-to-Many relationship occurs when each instance from the entity on the left can have many instances from the entity on the right, and vice versa.
Some e... | <urn:uuid:037f6064-e2a0-4c11-be75-7b0f33977b67> | 3.125 | 607 | Personal Blog | Software Dev. | 44.36562 | 3,826 |
When it comes to full-text indexing, we usually think of methods such as inverted indices that break text on word boundaries, consequently requiring search terms to be whole words only. Yet all of us probably have had the experience of searching for not-quite-words C++, VM/CMS, SQL*Plus, 127.0.0.1, <blink>, and the lik... | <urn:uuid:1c238001-944c-4fd7-8665-f7c369fc648f> | 2.9375 | 1,300 | Academic Writing | Software Dev. | 61.033227 | 3,827 |
Ancient Ecosystem Discovered Beneath Antarctic Glacier
Scientists have found life in an ecosystem trapped underneath a glacier in Antarctica for nearly 2 million years. The microbes, they suggest, are surviving the dark, oxygen-free waters by drawing energy from sulfur and iron. The findings provide insight into how li... | <urn:uuid:26e6eff9-5a4e-4c12-8618-d87c95516771> | 3.96875 | 330 | Truncated | Science & Tech. | 32.326272 | 3,828 |
Des Moines, IA— Eleven months after a heavy rainstorm led to record flooding that devastated Council Bluffs, a new Environment Iowa report confirms that extreme rainstorms are happening 35 percent more frequently in Iowa since 1948.
“As the old saying goes, when it rains, it pours—especially in recent years as bigger s... | <urn:uuid:a12eea9a-8b5c-45ac-840f-5175343ff29a> | 3.359375 | 1,021 | News (Org.) | Science & Tech. | 34.005304 | 3,829 |
Sunlight, Snow, and a Twig
March 5th, 2012
We had a big snowfall last week and the snow has been melting for the last few days. I came across this little scene yesterday:
The direction to the sun is clearly marked by the twig’s shadow. What’s striking to me is the melt hole around the twig. Why is it shaped the way it ... | <urn:uuid:d684431a-e2d0-456a-b5e1-ff42c4f03201> | 2.65625 | 547 | Personal Blog | Science & Tech. | 69.877371 | 3,830 |
Protected forest strips buffering rivers and streams of the Amazon rainforest should be significantly wider than the current legal requirement, according to pioneering new research by scientists at the University of East Anglia (UEA).
Published in the journal Conservation Biology on March 21, this is the first wildlife... | <urn:uuid:46d7dd3b-18cd-4ccf-b419-05c582a76d9e> | 3.734375 | 535 | News (Org.) | Science & Tech. | 26.502939 | 3,831 |
In the Media
Laser-based forest mapping as accurate for carbon as ground plot sampling
November 02, 2011
Two new research papers show that an advanced laser-based system for forest monitoring is at least as accurate as traditional plot-based assessments when it comes to measuring carbon in tropical forests.
The first p... | <urn:uuid:dddd7c7f-be81-497d-89d7-25932bd23cb4> | 2.734375 | 305 | News (Org.) | Science & Tech. | 3.518452 | 3,832 |
Stephen Hawking warned that space colonies are humanity's last great hope for survival in the long-term. He believes that space exploration is crucial, and it is time to go.
The scary thing is that the astrophysicist thinks that the world will face a disaster within the next 100 years, which is very soon. Stephen Hawki... | <urn:uuid:d7222b80-7dfb-4196-8518-50df054a6fdc> | 2.625 | 348 | Truncated | Science & Tech. | 54.540495 | 3,833 |
Two American scientists won the Nobel Prize in chemistry Wednesday for their work revealing protein receptors that tell cells what is going on in and around the human body. Their achievements have allowed drug makers to develop medication with fewer side effects.
Research spanning four decades by Robert J. Lefkowitz an... | <urn:uuid:d12b1ba7-627e-47e2-820a-f34e790b9183> | 2.78125 | 987 | News Article | Science & Tech. | 40.853768 | 3,834 |
The new Pythagoras
One of mathematics' best known theorems is that which is attributed to Pythagoras.
Pythagoras, however, had a rival, named Pyfudgerous.
He too had a theorem for working out the hypotenuse of
a right-angled triangle from the length of the other two sides.
I am confident that readers will have no diffi... | <urn:uuid:d549566b-e6e9-4008-8719-66f3335e174c> | 3 | 1,286 | Personal Blog | Science & Tech. | 58.510991 | 3,835 |
Wasteful printing is no longer an issue thanks to Print A Forest’s initiative to plant a tree for every hundred pages a person prints.
Founder and Michigan State University graduate Joe Miller saw a problem with the amount of paper – approximately nine million annually – he and other students were printing for classes ... | <urn:uuid:07610561-ae4d-49eb-8827-1f79e705ff59> | 2.53125 | 409 | News Article | Science & Tech. | 38.96683 | 3,836 |
Chiricahua National Monument AQRV's
Most surface waters in Chiricahua NM are likely to be well-buffered and, as a result, insensitive to acidic atmospheric deposition because of an abundance of base cations in underlying park soils and rocks. However, studies currently underway have identified certain soils in the park... | <urn:uuid:587efa52-4661-4d0c-9651-8479bf115231> | 3.53125 | 464 | Knowledge Article | Science & Tech. | 20.830164 | 3,837 |
Generating Graphics With Piddleby Michal Wallace
You probably know by now that Python's flexible data structures make working with complex data a breeze. Did you know Python also makes it a snap to visualize your data in vibrant color?
Thanks to the slew of graphics modules people have built, Python is a handy language... | <urn:uuid:a0845093-1ce8-4deb-94e9-53179146b469> | 2.703125 | 1,598 | Documentation | Software Dev. | 63.990474 | 3,838 |
Global fisheries receive billions of dollars in subsidies each year. Although some of this money, such as that to improve fisheries management, can promote sustainable fishing practices, other funding can lead to overfishing in the world’s oceans. Capacity-enhancing subsidies, for example for fuel or boat construction, red... | <urn:uuid:9d8b2e5c-c2c0-4092-9b07-b067ce66155d> | 3.21875 | 266 | Knowledge Article | Science & Tech. | 22.01376 | 3,839 |
CREATE TEXT SEARCH CONFIGURATION creates a new text search configuration. A text search configuration specifies a text search parser that can divide a string into tokens, plus dictionaries that can be used to determine which tokens are of interest for searching.
If only the parser is specified, then the new text search... | <urn:uuid:c08e49bb-eb7d-4521-990d-2fcef59c70a5> | 2.53125 | 241 | Documentation | Software Dev. | 37.237245 | 3,840 |
OPEN cursor_name OPEN cursor_name USING value [, ... ] OPEN cursor_name USING SQL DESCRIPTOR descriptor_name
OPEN opens a cursor and optionally binds actual values to the placeholders in the cursor's declaration. The cursor must previously have been declared with the DECLARE command. The execution of OPEN causes the qu... | <urn:uuid:69169b99-23f3-4892-9962-e0dd61c245ea> | 2.75 | 325 | Documentation | Software Dev. | 56.121193 | 3,841 |
String replaceAll in java
In this section you will learn about replaceAll() method in java, This will replace each of the sub string with the given replacement. This method will return the resulting string..
Split in java
This section illustrate the use of split in java. Split is used to split the string in the given f... | <urn:uuid:e91862c5-9c86-4844-8490-e9f2bba14e11> | 3.921875 | 2,710 | Content Listing | Software Dev. | 48.462209 | 3,842 |
Oct. 29, 2010 The fear that global temperature can change very quickly and cause dramatic climate changes that may have a disastrous impact on many countries and populations is great around the world. But what causes climate change and is it possible to predict future climate change? New research from the Niels Bohr In... | <urn:uuid:f98d951e-47d9-4921-8972-1b463bfd5770> | 4.15625 | 907 | News Article | Science & Tech. | 47.962677 | 3,843 |
Nov. 7, 2012 A new study led by researchers from the University of York suggests protected areas in East Africa are not conserving plants such as the iconic Acacia tree.
Acacia, the thorny flat-topped tree that characterises the African savannas, is an important component of ecosystem diversity. However, the researcher... | <urn:uuid:93cc024b-43b2-48bf-8416-fa5d1a58167c> | 3.796875 | 843 | News Article | Science & Tech. | 25.500473 | 3,844 |
Web edition: June 15, 2012
Print edition: June 30, 2012; Vol.181 #13 (p. 26)
Arguably, and it would be a tough argument to win if you took the other side, computers have had a greater impact on civilization than any other machine since the wheel. Sure, there was the steam engine, the automobile and the airplane, the pr... | <urn:uuid:939ee34a-3711-4e56-ae18-216fe2c0cf05> | 3.46875 | 2,804 | Knowledge Article | Science & Tech. | 37.696996 | 3,845 |
Space scientists are evaluating the use of moon-based instruments to study Earth. The sensors at an Earth Observatory on the moon could yield distinctive observations of our home world, its vegetation and polar caps, as well as monitor sun-Earth interactions.
One early prospect is to inspect Earth from the moon to appr... | <urn:uuid:5da20656-c1b4-48b9-a2bb-b19726fe8e6f> | 4.125 | 1,035 | Truncated | Science & Tech. | 37.335604 | 3,846 |
Dear Astronomers: […] I've poured through my roughly 200 astronomy books and can't find an answer to this question asked by a boy at one of my recent talks: Why do the outer gas giant planets [generally] rotate faster than the inner planets? I was shocked at first because I realized I should know that! The best I could... | <urn:uuid:4cb4b674-79a5-49c4-bcd8-7d5c9dac6689> | 3.0625 | 401 | Q&A Forum | Science & Tech. | 46.137697 | 3,847 |
John W. Halfacre (Purdue University, Indiana) and Carlton Rauschenberg (Bigelow Laboratory for Ocean Sciences, Maine)
August 7, 2011
The O-buoy Project is an NSF funded research project involving the collaboration of Bigelow Laboratory, Purdue University, University of Alaska – Fairbanks, the U.S. Army Cold Regions Res... | <urn:uuid:235a8f62-e15a-4bb8-9b4d-9a2b7f3b88ed> | 2.9375 | 1,047 | News (Org.) | Science & Tech. | 43.908904 | 3,848 |
Outflow from World's Largest River – The Amazon – Powers Atlantic Ocean Carbon “Sink”
News story originally written on July 21, 2008
Nutrients from the Amazon River's outflow spread well beyond the continental shelf and drive carbon cycling in the tropical ocean, say scientists who conducted a multi-year study. They wi... | <urn:uuid:aad55052-e624-4b97-a824-cb43eed4f9c1> | 3.3125 | 738 | News Article | Science & Tech. | 25.795833 | 3,849 |
All-Wavelengths Galactic Center
In celebration of the International Year of Astronomy 2009, NASA's Great Observatories -- the Hubble Space Telescope, the Spitzer Space Telescope, and the Chandra X-ray Observatory -- have collaborated to produce an unprecedented image of the central region of our Milky Way galaxy.
In th... | <urn:uuid:ca158c08-cd95-4f0a-ae10-6adf589306b9> | 3.890625 | 406 | Truncated | Science & Tech. | 41.392778 | 3,850 |
"But we can see that the trend is towards increases, and that that's something we do need to worry about," Joughin said. "And that if we really want to have meaningful information that, you know, planners can use to build seawalls and things, there's going to have to be a big push to improve our projections of sea leve... | <urn:uuid:d3eaa969-e9a8-4c07-b390-d617d1bf786c> | 3.15625 | 454 | News Article | Science & Tech. | 49.606122 | 3,851 |
National Water Research Institute
Canada's Leader in Freshwater Research
Environment Canada's National Water Research Institute (NWRI) is the largest freshwater research entity in Canada. NWRI, National Water Quality Monitoring and staff at Centre Saint-Laurent in Montreal make up the Water Science and Technology Direc... | <urn:uuid:6f459381-a67b-4aef-aad9-10a573091c6a> | 2.90625 | 552 | About (Org.) | Science & Tech. | 14.366269 | 3,852 |
The biodiversity hierarchy: a historical overview of biodiversity research from genes to ecosystems.
Agrawal, Anurag*,1, Johnson, Marc2, 1 Cornell Univeristy, Ithaca, NY2 University of Toronto, Toronto, Ontario
ABSTRACT- Research on the ecological consequences of biodiversity has long been a fundamental focus in ecolog... | <urn:uuid:523a1b42-f903-4569-aa97-eb895586040c> | 2.9375 | 408 | Academic Writing | Science & Tech. | -17.310023 | 3,853 |
Hop, skip and jumping robots
February 11, 2013 |
Jumping robots powered by a combustion engine? Sounds like something from 1930s sci-fi.
New leaps and bounds in heat-resistant materials mean soft-bodied silicon robots can now use controlled explosions, like those in car engines, to make them jump really high.
An electr... | <urn:uuid:70bf8da2-e964-443d-91b1-81cabe981f69> | 3.34375 | 169 | Truncated | Science & Tech. | 71.374421 | 3,854 |
The US has a potential for harvesting wind energy that can realistically be described as staggering, but a lot of the best sites are in its sparsely populated Great Plains, far away from the urban centers that need the power. Along the densely populated East Coast, most of the best sites are offshore, and studies have ... | <urn:uuid:3d75cc7a-223c-4975-ab84-42dae22140ec> | 3.15625 | 395 | News Article | Science & Tech. | 22.04178 | 3,855 |
Gilad writes, from JLS 2nd edition draft:
- A nested class is any class whose declaration occurs within the body of
another class or interface.
- A top-level class is class that is not a nested class.
- An inner class is a nested class that is not declared (implicitly or
"Nested class" is the more general term, as it a... | <urn:uuid:0df900b1-14b3-4398-9f3f-75fc4a3ad1a4> | 2.5625 | 159 | Comment Section | Software Dev. | 42.241723 | 3,856 |
A 'Blue Marble' image of the Earth taken from the VIIRS instrument aboard NASA's most recently launched Earth-observing satellite - Suomi NPP. (Image credit: NASA/NOAA/GSFC/Suomi NPP/VIIRS/Norman Kuring)
By Dr. Amber Jenkins,
NASA Jet Propulsion Laboratory
Cross-posted from weather.com
NASA released the spectacular vie... | <urn:uuid:c2d3a86b-05e1-40cd-8c96-35b65d288082> | 3.3125 | 488 | News (Org.) | Science & Tech. | 44.98 | 3,857 |
Derby embedded basics
This section explains how to use and configure Derby in
an embedded environment.
Included in the installation is a sample application program, /demo/programs/simple,
which illustrates how to run Derby embedded
in the calling program.
- Derby JDBC driver
Derby consists of both the database engine a... | <urn:uuid:2ba4c563-508c-4288-934e-9bd5fdd7650c> | 2.578125 | 235 | Documentation | Software Dev. | 28.757818 | 3,858 |
The definition of a definite integral:
requires the interval [a,b] be finite. The Fundamental Theorem of Calculus requires that f be continuous on [a,b]. In this section, you will be studying a method of evaluating integrals that fail these requirements—either because their limits of integration are infinite, or becaus... | <urn:uuid:ddf486eb-51a9-43ee-8e8c-952946bd3b3d> | 3.765625 | 1,028 | Documentation | Science & Tech. | 48.363574 | 3,859 |
Structural Biochemistry/Lipids/Fluid Mosaic Model
Fluid Mosaic Model
The fluid mosaic model is used to describe the interactions of lipids and proteins in biological membranes. This model essentially proclaims the concept of lateral diffusion, stating that proteins can freely move about within a membrane and that such... | <urn:uuid:3e54e468-21e5-44ff-a541-713f91558e74> | 3.59375 | 1,484 | Knowledge Article | Science & Tech. | 34.836886 | 3,860 |
Differential Absorption Lidar (DIAL)
Light is absorbed by many of the atmospheric components. Absorption of light by molecules is the basis for DIAL which is used to measure the atmospheric concentrations of gases such as water vapor and ozone.
DIAL Measurements of Water Vapor
As shown in figure (a), water vapor has ma... | <urn:uuid:2beebe7c-8aaa-4c3d-80fc-4a5dce1df539> | 4.125 | 330 | Knowledge Article | Science & Tech. | 22.809924 | 3,861 |
Competition potential between sauger and walleye in non-native sympatry: historical trends and resource overlap in the Middle Missouri River, Montana
Title: Competition potential between sauger and walleye in non-native sympatry: historical trends and resource overlap in the Middle Missouri River, Montana
Creator: Bell... | <urn:uuid:9e4ef17d-4e8e-45ea-9e94-636e3ca7ed32> | 2.75 | 634 | Academic Writing | Science & Tech. | 18.009911 | 3,862 |
Tourmaline is easy to recognize. This Chinese tourmaline specimen, shown about twice life size, displays the typical crystal shape of a nine-sided prism. It also displays the typical striations along the long axis and the glassy luster. Its hardness is 7 to 7.5, its streak is white, and it has poor cleavage. Tourmaline... | <urn:uuid:3238a0a1-4857-484a-acf4-631dbb08e1dc> | 3.0625 | 311 | Knowledge Article | Science & Tech. | 36.913313 | 3,863 |
One of the more amazing facts about the ongoing destruction of the Greenland ice sheet is that it is producing earthquakes that can be detected worldwide. Now, fresh evidence is at hand to show that these “ice quakes” are spreading to previously quiescent parts of Greenland. We’re only in September, but it seems increa... | <urn:uuid:37301276-5d6e-4aca-b322-553c3677d103> | 3.328125 | 683 | News Article | Science & Tech. | 50.976035 | 3,864 |
Two New Salamanders Discovered
11 February 2013 | News story
A team of young researchers from Colombia have recently published an article in the journal Zootaxa describing two new species of salamander discovered during a project supported by the Conservation Leadership Programme and Save Our Species. This exciting dis... | <urn:uuid:821f8c9e-167d-41d4-9e57-5447fb3cc4d7> | 2.78125 | 755 | News (Org.) | Science & Tech. | 28.448125 | 3,865 |
Automation makes it possible for your application to manipulate objects implemented in another application, or to expose objects so they can be manipulated. An Automation server is an application that exposes programmable objects (called Automation objects) to other applications (called Automation clients). Automation ... | <urn:uuid:6867a4ea-1851-491b-b5e3-b64930105572> | 3.25 | 670 | Documentation | Software Dev. | 25.006715 | 3,866 |
Between the Galaxies
Name: bryan matthewkarp
Date: 1993 - 1999
What if any thing is in between galaxies, besides space?
How much cooler are sunspotsthan the actual surface of the sun?
Why is the sky sometimes green?
How are satellites named?
"empty" space between galaxies (extra-galactic space) actually
contains about ... | <urn:uuid:170a9f4e-2399-4901-8b9c-7da60e0ff802> | 3.1875 | 167 | Content Listing | Science & Tech. | 48.927714 | 3,867 |
Odonates as biological indicators of grazing effects on Canadian prairie wetlands
Article first published online: 27 MAY 2005
Volume 30, Issue 3, pages 273–283, June 2005
How to Cite
Lee Foote, A. and Rice Hornung, C. L. (2005), Odonates as biological indicators of grazing effects on Canadian prairie wetlands. Ecologic... | <urn:uuid:1fe80887-456a-4d0b-8a09-9151ec296f71> | 3.359375 | 510 | Truncated | Science & Tech. | 21.342857 | 3,868 |
(By masak and moritz)
Newcomers to the Perl programming language, version 5, often complain that
they can’t reverse strings. There’s a built-in reverse function, but it doesn’t seem to work at first glance:
$ perl -E "say reverse 'hello'" hello
When such programmers ask more experienced Perl programmers, the solution i... | <urn:uuid:02776515-42d9-4138-8c7f-3fd7de5967da> | 2.890625 | 660 | Personal Blog | Software Dev. | 56.919318 | 3,869 |
A breakthrough in the harnessing of 'T-rays' - electromagnetic terahertz waves - which could dramatically improve the detecting and sensing of objects as varied as biological cell abnormalities and explosives has been announced.
Researchers at the University of Bath, UK, and in Spain have said they have found a way to ... | <urn:uuid:1486ae3c-fa8c-45ff-84f9-7120159d0fc5> | 3.5 | 705 | News Article | Science & Tech. | 36.812698 | 3,870 |
Blood clot, coloured scanning electron micrograph (SEM). Red blood cells (erythrocytes) and white blood cells (leucocytes, green) trapped within the fibrin mesh (yellow) of a fresh blood clot. Clots are formed in response to cardiovascular disease or injuries to blood vessels. White blood cells commonly occur in blood ... | <urn:uuid:2007721c-ac15-426a-ae42-dcb5ec41808c> | 3.59375 | 104 | Truncated | Science & Tech. | 35.944 | 3,871 |
Vectorization, the Other Parallelism
Moore's Law correctly predicted that processor transistor density would increase year after year. All those extra transistors have been used to make powerful hardware capabilities like multiple cores and hardware extensions that improve performance. Intel processors have extensions ... | <urn:uuid:572d7543-1046-4aec-ace5-41303ea7434a> | 3.171875 | 396 | Tutorial | Software Dev. | 12.159495 | 3,872 |
Editor's note: The following column was co-authored by Alex Johnson, a post-doctoral fellow at Harvard University.
For the past several years--until the credit crisis--investors have flocked toward renewable energy. Their hope is that solar radiation can be harnessed directly and through intermediaries such as the wind... | <urn:uuid:6b7ba779-60ae-4245-947f-1023736357ef> | 3.59375 | 1,718 | Nonfiction Writing | Science & Tech. | 32.397655 | 3,873 |
The ears on a South American rainforest katydid’s legs work nearly the same way human ears do, a new study has found, showing that animal groups as apparently unrelated as mammals and insects have evolved with similar body bits.
Mammal ears work in three stages to convert air vibrations to sound. First, the acoustic wa... | <urn:uuid:18e744fc-fe8e-4b88-a7ac-c07b85937a0b> | 4.0625 | 485 | News Article | Science & Tech. | 35.258544 | 3,874 |
Molar heat capacity
From Uncyclopedia, the content-free encyclopedia
Molar heat capacity is a measurable physical quantity that characterizes the ability of a mole to explode (or, in scientific terms, asplode.) It is defined as the rate of change of temperature as heat is added to a mole's body at the given conditions ... | <urn:uuid:8e3140d8-ea79-4669-92a0-fd89ded9055b> | 3.5625 | 846 | Knowledge Article | Science & Tech. | 49.293683 | 3,875 |
POTSDAM A Clarkson University professor contributed to research revealing the second-leading cause of man-made global warming.
Philip K. Hopke, director of the Clarkson Center for the Environment and of the Center for Air Resources Engineering and Science, is co-author of a study that identifies black carbon, or soot, ... | <urn:uuid:a7015888-4fa1-4e29-8201-a148e320cefd> | 3.15625 | 612 | News Article | Science & Tech. | 46.274497 | 3,876 |
|A Microscopic Double-Slit Experiment|
Two centuries ago, Thomas Young performed the classic demonstration of the wave nature of light. He placed a screen with two tiny slits in front of a single light source, effectively converting it into a two-centered source. On a second screen far away, he saw a pattern of light a... | <urn:uuid:b9ad457f-9423-4461-9407-ba95e7a33f7c> | 3.359375 | 1,077 | Knowledge Article | Science & Tech. | 21.462413 | 3,877 |
News: News Archives
NASA Orbiter Provides New Hints of Past Groundwater Flows on Mars
Photos courtesy of NASA
Chris H. Okubo
A spacecraft recently arrived at Mars has provided new evidence that fluids, likely including water, once flowed widely through underlying bedrock in a canyon that is part of the great Martian ri... | <urn:uuid:da9a51fa-793a-40c6-a671-30636cf29a43> | 3.375 | 1,370 | News (Org.) | Science & Tech. | 34.140877 | 3,878 |
In the twenty-first century people use energy in a wide variety of ways - to power computers, to light and heat homes, to fly across the world and to manufacture goods. Almost all of this energy comes from fossil fuels. As these fuels begin to run out, what will replace them? This book examines:
the pros and cons of nu... | <urn:uuid:72b747f0-5e13-4406-bb9b-83c0a0e6d2ff> | 2.84375 | 120 | Product Page | Science & Tech. | 45.571582 | 3,879 |
Thanks to one of the most productive spacecraft ever built, scientists are far better acquainted with the star that lights our world and gives us life. Built for ESA by European industry, the Solar and Heliospheric Observatory (SOHO) went into space on December 2, 1995.
The tenth anniversary of SOHO's launch is a time ... | <urn:uuid:88bdc9c8-6693-4e59-a6ec-448c6fc1f0b9> | 3.46875 | 918 | Knowledge Article | Science & Tech. | 38.935324 | 3,880 |
Rover Opportunity may be at clay-rich site on Mars
This image provided by NASA shows a shadow self-portrait taken by NASA’s Opportunity rover on the Martian surface. The solar-powered spacecraft has been exploring a huge crater in the Martian southern hemisphere and has detected what appear to be clay minerals. (AP Pho... | <urn:uuid:bbb69543-e557-4318-87a9-7b02e0876cb6> | 3 | 488 | News Article | Science & Tech. | 39.569837 | 3,881 |
Frequently Asked Questions About Ozone (11)
Scientific Assessment of Ozone Depletion: 1998
World Meteorological Organization Global Ozone Research and Monitoring Project - Report No. 44
National Oceanic and Atmospheric Administration
National Aeronautics and Space Administration
World Meterological Organization
United ... | <urn:uuid:9ad39a4e-17a3-48a2-81e2-78440c742cfa> | 3.796875 | 1,035 | FAQ | Science & Tech. | 20.593038 | 3,882 |
ultrasonics, study and application of the energy of sound waves vibrating at frequencies greater than 20,000 cycles per second, i.e., beyond the range of human hearing. The application of sound energy in the audible range is limited almost entirely to communications, since increasing the pressure, or intensity, of soun... | <urn:uuid:b2aa78c3-d221-494e-b81c-611cc8fc346e> | 3.75 | 453 | Knowledge Article | Science & Tech. | 26.276995 | 3,883 |
The Ontario Biodiversity Council (OBC), in conjunction with the Ontario Ministry of Natural Resources, released its State of Ontario’s Biodiversity 2010 report last week, comprised of 29 indicators that provide the most comprehensive overview to date of the province’s natural environment and the pressures that must be ... | <urn:uuid:6dbcd87d-24db-40e0-8257-eee854a5409d> | 3.0625 | 514 | News (Org.) | Science & Tech. | 19.09471 | 3,884 |
This is another post on open standards, a concept that affects all aspects of the mobile experience, from the processors and operating systems to carriers and devices and finally to the end user. When creating web-based content, XHTML and CSS set standards for open sourced coding structure and help to create a consiste... | <urn:uuid:ea62cf04-657d-469b-ae7e-b9e6bf37daa3> | 3.203125 | 746 | Personal Blog | Software Dev. | 34.963664 | 3,885 |
While you're enjoying your coffee this morning, half a dozen scientists are already at work. They're not sitting at desks, however, but a few miles off the Florida Keys, 60 feet down on the ocean bottom.
The researchers are living and working this week at Aquarius Reef Base, the world's last undersea research laborator... | <urn:uuid:537b97df-24d2-424a-a53d-9d4f65fbd709> | 2.96875 | 1,136 | News Article | Science & Tech. | 55.083642 | 3,886 |
According to NSIDC director Mark Serreze “we are now in uncharted territory”, while Greenpeace International Executive Director Kumi Naidoo has described the race to save the Arctic as "the defining environmental battle of our era".
To help understand the science behind the record melt, the Greenpeace ship Arctic Sunri... | <urn:uuid:43205b58-17ba-4744-96a6-2284c902766e> | 3.546875 | 1,095 | Audio Transcript | Science & Tech. | 51.602488 | 3,887 |
This page is intended as a brief overview of delimited continuations and related constructs, and how they can be used in Haskell. It uses the library CC-delcont as a vehicle for doing so, but the examples should be general enough so that if you have another implementation, they should be relatively straight forward to ... | <urn:uuid:ac5d1dac-c152-486c-9168-d06f1eb82fdb> | 3.609375 | 1,779 | Documentation | Software Dev. | 39.842137 | 3,888 |
Director of Communications
The Kavli Foundation
Director of Communications
The Kavli Foundation
(Originally published by NASA)
August 15, 2012
Astronomers have found an extraordinary galaxy cluster -- one of the largest objects in the Universe -- that is breaking several important cosmic records. Observations of this c... | <urn:uuid:6cd5e10f-a142-45cc-b934-1231593e2871> | 3.8125 | 1,101 | News (Org.) | Science & Tech. | 35.635446 | 3,889 |
A recent survey of the Coral Sea and Great Barrier Reef has found coral flourishing in deep waters, a stark contrast to the shallower reefs that have seen a drastic decline over the last few decades.
The healthy coral populations were discovered to be below 30 meters -- beyond the usual reach of most scuba divers -- an... | <urn:uuid:7d866fbf-1dd5-4603-ae5f-d72bf11a7b59> | 3.328125 | 454 | News Article | Science & Tech. | 47.707745 | 3,890 |
DELTA HYDROBE (Probythinella emarginata)
The delta hydrobe is a very small (<5mm long) aquatic snail. Its diminutive size and flattened apex make it readily identifiable. While most aquatic snails in Kansas possess lung tissue (pulmonate snails) and get their oxygen from the air, the delta hydrobe is one of only five K... | <urn:uuid:22c26424-676e-4bb2-ab92-6cc45c0c8c3b> | 3.046875 | 428 | Knowledge Article | Science & Tech. | 16.087139 | 3,891 |
The Energy Debates: Small Wind Power
Editor's Note: "The Energy Debates" is a LiveScience series about the pros, cons, policy debates, myths and facts related to various alternative energy ideas. We invite you to join the debate by commenting directly on each article.
The picture that wind power often brings to mind is... | <urn:uuid:6fe290b3-1ec6-4ebf-bd77-c49faa946fa2> | 3.125 | 742 | Truncated | Science & Tech. | 42.521222 | 3,892 |
Translation - of a polygon
From Latin: translatus - "carried over,"
Moving a figure to a new location with no other changes.
Drag any orange dot to reshape the left (yellow) original figure. Drag the image (right, gray) to translate it to a new location.
To translate a figure is to simply slide it somewhere else. But i... | <urn:uuid:cc12f88a-469c-4d09-88f6-0ec821383584> | 3.828125 | 424 | Tutorial | Science & Tech. | 49.786801 | 3,893 |
HTTP/1.1 200 OK Date: Thu, 23 May 2013 19:04:34 GMT Server: Apache/1.3.31 (Unix) mod_auth_tkt/1.3.11 PHP/4.3.8 mod_ssl/2.8.19 OpenSSL/0.9.7d mod_perl/1.29 X-Powered-By: PHP/4.3.8 Set-Cookie: cookieConsent=X; path=/ Connection: close Content-Type: text/html
About Antarctica - Dramatic clouds above Reptile Ridge, Adelaid... | <urn:uuid:63e1dba6-bada-4de4-95a1-89d961f932b0> | 3.5625 | 879 | Knowledge Article | Science & Tech. | 43.289086 | 3,894 |
How Pine Bark Beetles Created an Elaborate and Deadly Mess
By DINA FINE MARON of ClimateWire
Published: October 28, 2010
More News From ClimateWire
- Technology Companies Are Lining Up for Smart Grid Business
- European Renewables Industry Staggered First by Recession, Now by Budget Cuts
- The Arctic Shifts to a New Cl... | <urn:uuid:f487642d-ae0f-4ff5-b301-60380e707bdf> | 2.90625 | 931 | Truncated | Science & Tech. | 45.390027 | 3,895 |
"HOW do i guess that next would indeed be written as next and not next()...?"
perldoc -f next at your command prompt.
is an integral flow control function in perl... it's not something special to any particular (non-core) module.
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tag... | <urn:uuid:b2e2b916-8f84-40cc-ba29-03f6358c9ada> | 2.671875 | 329 | Comment Section | Software Dev. | 86.489604 | 3,896 |
I'm working to develope a web-based Geographical Information System (GIS)
and one of the big problems I had was to write an easy algorithm to zoom a portion
of a map.
First of all I tried to use Server Side Maps, but I found that they need a
Perl script with too many lines of code. So I came to phpbuilder and found an
... | <urn:uuid:73908f90-a1a2-4d76-a712-91e4ea42cda0> | 2.515625 | 360 | Personal Blog | Software Dev. | 67.825 | 3,897 |
psql is a terminal-based front-end to PostgreSQL. It enables you to type in queries interactively, issue them to PostgreSQL, and see the query results. Alternatively, input can be from a file. In addition, it provides a number of meta-commands and various shell-like features to facilitate writing scripts and automating... | <urn:uuid:062e7476-c12a-4ff2-9b2d-b2aa4bd793ef> | 2.8125 | 10,621 | Documentation | Software Dev. | 53.160821 | 3,898 |
University of California, Davis scientists have developed a self-cleaning cotton fabric that can kill bacteria and break down toxic chemicals such as pesticide residues when exposed to light.
"The new fabric has potential applications in biological and chemical protective clothing for health care, food processing, and ... | <urn:uuid:11f1b029-bab2-4f74-8361-fe3afb291402> | 2.953125 | 260 | News Article | Science & Tech. | 26.048833 | 3,899 |