text large_stringlengths 148 17k | id large_stringlengths 47 47 | score float64 2.69 5.31 | tokens int64 36 7.79k | format large_stringclasses 13
values | topic large_stringclasses 2
values | fr_ease float64 20 157 |
|---|---|---|---|---|---|---|
"The Processing language was originally created at MIT as part of the Media lab and Aesthetics and Computation group. They needed a way to bridge the gap between software developers, artists, data visualizers, etc., and to do so in a way that allowed new programmers (or non-programmers) to do complex visual work easily... | <urn:uuid:1040756c-e596-43cc-bd11-6c4f33b702a8> | 2.953125 | 233 | Personal Blog | Software Dev. | 51.843896 |
The magnetic and electric fields are force fields. They exert forces on magnetic or charged particles. We can measure these fields easily with instruments that respond to such forces. Magnetic and electric fields therefore have a very real and tangible existence. But these force fields themselves are merely higher orde... | <urn:uuid:874613ab-5a67-44d2-a2f6-45c09ccf1bdb> | 4.125 | 1,397 | Academic Writing | Science & Tech. | 33.025924 |
Earlier today, scientists at the European Space Agency marked a milestone: On March 1, 2002, the largest Earth observation satellite ever built was launched into orbit. During the course of its (extended) lifetime, the Envisat satellite has circled the Earth more than 50,000 times, providing fodder to scientists publis... | <urn:uuid:51e1d7b5-d6f2-4488-aa53-8ea53d49cc5e> | 3.125 | 182 | Truncated | Science & Tech. | 33.941164 |
Suppose you have to specify the moment in time when a given event occurred, a "zero time". The record must be accurate to the minute, and be obtainable even after thousands of years. All the measures of time we currently have are relative to a well defined zero, but the zero is not easy to backtrack exactly.
One possib... | <urn:uuid:ac094f67-9815-4f22-8c94-cf5cc20e575a> | 3.15625 | 239 | Q&A Forum | Science & Tech. | 45.4335 |
Plus MagazineIssue 2
Find out how modern telephone networks use mathematics to make it possible for a person to dial a friend in another country just as easily as if they were in the same street, or to read web pages that are on a computer in another continent.
The mathematics underlying today's complex telephone netwo... | <urn:uuid:191b7f50-b479-4151-afd8-1a930ef3733c> | 3.421875 | 259 | Truncated | Science & Tech. | 45.783726 |
It's staggering to imagine a time when the Earth and its planetary siblings were nothing but cosmic dust. Yet astronomers agree that this was the state of things some 4.5 billion years ago. Our sun was but a fledgling protostar, continually amassing more matter via gravity and steadily cranking up its internal nuclear ... | <urn:uuid:e7c5ba70-25f4-44d8-a074-b668cd00bc95> | 4.34375 | 504 | Knowledge Article | Science & Tech. | 47.321515 |
Deep Seas, Dark Worlds
There's barely enough room for three people to fit. But marine scientists Richard Lutz and Peter Rona of Rutgers University crammed themselves into Alvin, a tiny submersible vehicle made for exploring the deep seafloor. Unlike scientists who boarded Alvin before them, Lutz and Rona weren't going ... | <urn:uuid:26904a0c-5ab1-40b6-b827-96508b347fca> | 3.125 | 1,445 | Knowledge Article | Science & Tech. | 50.600671 |
Nuclear Power in the World Today
(updated April 2012)
- The first commercial nuclear power stations started operation in the 1950s.
- There are now over 430 commercial nuclear power reactors operating in 31 countries, with 372,000 MWe of total capacity.
- They provide about 13.5% of the world's electricity as continuou... | <urn:uuid:486837de-75b8-4002-b5a4-6aac53a09e78> | 3.453125 | 1,212 | Knowledge Article | Science & Tech. | 47.325606 |
Science subject and location tags
Articles, documents and multimedia from ABC Science
Friday, 24 May 2013
Citizen scientists have helped solve a decades-old puzzle by assisting astronomers to make the most accurate distance measurements yet for an important star system.
Monday, 25 March 2013
Unnecessary use of antibiot... | <urn:uuid:812f9384-c3e1-4d07-a5e8-521022daa294> | 2.8125 | 503 | Content Listing | Science & Tech. | 34.918533 |
Science Fair Project Encyclopedia
Artificial life, also known as alife or a-life, is the study of life through the use of human-made analogs of living systems. Computer scientist Christopher Langton coined the term in the late 1980s when he held the first "International Conference on the Synthesis and Simulation of Liv... | <urn:uuid:ded0c78a-965d-4595-a118-4afb5e76430a> | 3.28125 | 2,544 | Knowledge Article | Science & Tech. | 25.42966 |
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.
...the stream). The processing and transport of essential elements follow a downstream sequence. Hypotheses attempting to explain ecological proce... | <urn:uuid:ee48c410-9bbd-47b9-ae4c-f26c682ae4a4> | 2.828125 | 120 | Truncated | Science & Tech. | 40.174333 |
Common Lisp the Language, 2nd Edition
Time is represented in three different ways in Common Lisp: Decoded Time, Universal Time, and Internal Time. The first two representations are used primarily to represent calendar time and are precise only to one second. Internal Time is used primarily to represent measurements of ... | <urn:uuid:b8251ed7-0cac-46e4-8c26-97b3b07b507c> | 3.640625 | 1,137 | Documentation | Software Dev. | 35.338803 |
Vast amounts of methane hydrates are stored in sediments along the continental margins. Their stability is due to the low temperature–high-pressure conditions found on the seafloor. Global warming could destabilize these hydrates and cause a release of methane (CH4) into the water column and possibly the atmosphere.
Se... | <urn:uuid:5c869535-feca-424c-86c8-afb0b90fec71> | 3.421875 | 458 | Academic Writing | Science & Tech. | 45.39528 |
DNA is tightly packed in the nucleus of every cell. DNA wraps around special proteins called histones, which form loops of DNA called nucleosomes. These nucleosomes coil and stack together to form fibers called chromatin. Chromatin in turn forms larger loops and coils to form chromosomes.
1 minute 43 seconds
Play Large... | <urn:uuid:3ec4b7c2-8bf6-4f2b-b8d5-01cbddd09660> | 2.875 | 134 | Truncated | Science & Tech. | 74.541951 |
|Jan3-13, 05:44 PM||#1|
I thought of this question the other day, and I was unable to solve it. A Google search has not helped, so I thought I might post it here.
A point mass hangs from a rod of length "l" from the center of a pendulum. The only forces acting upon the point mass are the force of gravity and the force ... | <urn:uuid:aacc4074-9ee6-4243-a7a4-8a3c803b8c48> | 2.6875 | 469 | Comment Section | Science & Tech. | 69.410204 |
Narrator: This is Science Today. A new air sampler, which can effectively trap and evaluate fine particle pollutants in both their solid and gas phases has been developed by scientist Lara Gundel of the Lawrence Berkeley National Laboratory. This sampler can greatly impact future EPA air quality standards and lead to a... | <urn:uuid:8a346dd2-3a3a-47c9-99e2-26e162d036a7> | 3.484375 | 235 | Audio Transcript | Science & Tech. | 25.4825 |
Narrator: This is Science Today. One of five nanoscale science research centers funded by the Department of Energy is located at the Lawrence Berkeley National Laboratory. Rick Kelly, the Environmental Health and Safety Manager of the Molecular Foundry, explains the intent of the facility is to foster the development o... | <urn:uuid:7c399043-75f4-4b7c-b080-b673d0d7e541> | 2.703125 | 258 | Audio Transcript | Science & Tech. | 21.82 |
Synchrotron radiation occurs when a charge moving at relativistic speeds follows a curved trajectory. In this section, formulas and supporting graphs are used to quantitatively describe characteristics of this radiation for the cases of circular motion (bending magnets) and sinusoidal motion (periodic magnetic structur... | <urn:uuid:4ace650b-f9a9-4a69-b1d3-dc8fbca78e59> | 4.125 | 3,070 | Academic Writing | Science & Tech. | 58.562295 |
According to Real Climate
, it's extremely unlikely for that to happen:
Could there be a methane runaway feedback?.
The “runaway greenhouse effect” that planetary scientists and climatologists usually call by that name involves water vapor. A runaway greenhouse effect involving methane release (such as invoked here) is... | <urn:uuid:c1cf679c-e4f0-4d25-96a4-c19981f8bf13> | 3.625 | 715 | Comment Section | Science & Tech. | 38.017242 |
Did you know that Hook Grasses can control water loss by folding up their leaves?
Contrary to their common name, Hook Grasses are not grasses but Sedges and they belong to the family Cyperaceae. Sedges are commonly found in wet or poorly drained habitats. Hook Grasses, however, can be found in a much greater diversity ... | <urn:uuid:8f2159a5-e882-4c5c-bd5a-4266cda1bcea> | 3.984375 | 274 | Knowledge Article | Science & Tech. | 46.821433 |
Next: Lu and Torquato Up: Lognormally Distributed Spheres Previous: Pleau and Pigeon
The equation for G given in Eqn. 13 for the sphere distribution of Eqn. 11 can also be used to approximate the correct value of G for the zeroth-order logarithmic distribution used here. The parameters a and b in Eqn. 11 are chosen to ... | <urn:uuid:b60987c1-f0ec-4555-be24-6f7c1f15038a> | 2.96875 | 491 | Academic Writing | Science & Tech. | 45.994467 |
[Source: National Space Science Data Center, http://nssdc.gsfc.nasa.gov/nmc/spacecraftDisplay.do?id=1999-067A
MSP F15 (USA 147) was launched by a Titan rocket from Vandenberg AFB on December 12, ... 1999 into a 101 minute, sun-synchronous near-polar orbit at an altitude of 840km and with the Local Time nodes of 21:10 a... | <urn:uuid:25d4dc5b-e319-486e-ab92-31c37b82cccc> | 3.015625 | 355 | Knowledge Article | Science & Tech. | 50.951083 |
Fisher Science Education, through a partnership with Beyond Benign, developed this classroom ready slide presentation that briefly describes the 12 principles of green chemistry. The presentation first focuses on the role of chemists in society and introduces green chemistry as a way to solve environmental problems. Ea... | <urn:uuid:58228af0-e824-44d1-aaac-c341a6c94cc6> | 3.71875 | 135 | Content Listing | Science & Tech. | 37.492652 |
Derived Types: PolygonB, PolygonN
An abstract class that serves as a base to its derived types, representing a collection of one or more exterior and interior rings. .
The rings do not need to be connected to or
contained by other rings in the polygon. However,
all rings are considered to be part of a single polygon re... | <urn:uuid:2a9b0100-8b02-4c5e-a1ee-2394f85f5eaa> | 3.203125 | 228 | Documentation | Software Dev. | 34.993601 |
Optogenetics, a brand new field of research in which living, cortical neurons and other cells can be manipulated or controlled with optical technology (namely fiber optic cables), has been heralded as the next big thing for treating such things as heart conditions, paralysis, and even diabetes.
Up until now, however, t... | <urn:uuid:468141bd-1cc8-4ece-a026-e2d012aea4ee> | 3.40625 | 546 | Truncated | Science & Tech. | 28.854286 |
Please keep in mind that this is a research project, and there may
sometimes be glitches with the interactive software. Please
let us know of any
problems you encounter, and include the computer operating system,
the browser and version you're using, and what kind of connection
you have (dial-up modem, T1, cable).
When... | <urn:uuid:a2cad3f8-fd14-4334-9514-fda5c1606010> | 3.90625 | 397 | Tutorial | Science & Tech. | 68.963202 |
Do cows pollute as much as cars?
Agriculture is responsible for an estimated 14 percent of the world's greenhouse gases. A significant portion of these emissions come from methane, which, in terms of its contribution to global warming, is 23 times more powerful than carbon dioxide. The U.S. Food and Agriculture Organiz... | <urn:uuid:e8ea9066-dc05-414c-8722-83a03d3bf0e8> | 3.28125 | 748 | Knowledge Article | Science & Tech. | 46.385065 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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.
You searched for
We found 16 results on physics.org and 241 results in our database of sites
241 are Websites,
0 are Videos,
and... | <urn:uuid:bea29a3b-4521-4ddf-9815-8cb6ca8788cb> | 3.3125 | 344 | Content Listing | Science & Tech. | 54.424181 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
(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 |
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 |
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 |
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 |
|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 |
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 |
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 |
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 |
|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 |
Assigning the result of a Boolean calculation into a variable is no different than assigning the result of number calculations or text string joins.
The following are examples of assigning the results of comparisons into new or existing Boolean variables.
1 var timeToEat = me === hungry; 2 var affordable = price < budg... | <urn:uuid:4d13388d-c58a-41cc-8d37-3bb19d23dbe1> | 3.578125 | 275 | Tutorial | Software Dev. | 42.464534 |
These students in Shishmaref, Alaska live on frozen ground. But frozen ground matters to people all over the world, even if the ground is not frozen where they live. —Credit: Angela Alston
People may not think much about frozen ground, but they notice what can happen when the ground freezes. The frozen ground may spit ... | <urn:uuid:d2623c5f-3070-4a94-b3a1-14c0e43ea72a> | 3.3125 | 514 | Knowledge Article | Science & Tech. | 66.76663 |
This illustration shows an artist’s impression of the brown dwarf 2MASSW J1207334-393254, or 2M1207 for short. With a mass that amounts to 25 times that of Jupiter, 2M1207 is surrounded by a circumstellar disc of gas and dust and possesses a planetary companion five times more massive than Jupiter. The planetary compan... | <urn:uuid:013a7432-9520-48e6-be36-74cb4bd9c787> | 3.421875 | 190 | Knowledge Article | Science & Tech. | 36.743703 |
This may be a naive question, but after the Fukushima Daiichi partial meltdown and studying the aftermath of Chernobyl it seems they could be helped by this idea.
In Chernobyl, the liquidators that cleaned up the disaster tunneled concrete under the reactor core and covered the whole complex in a big containment unit. ... | <urn:uuid:71fdea2a-415a-4fe9-bc9a-5ac80bbee432> | 3.40625 | 189 | Q&A Forum | Science & Tech. | 49.446623 |
AleochariniJames S. Ashe (1947-2005) and Christian Maus
This tree diagram shows the relationships between several groups of organisms.
The root of the current tree connects the organisms featured in this tree to their containing group and the rest of the Tree of Life. The basal branching point in the tree represents th... | <urn:uuid:161264a1-505c-4669-8d22-623217bf35ca> | 3.140625 | 1,333 | Knowledge Article | Science & Tech. | 46.599432 |
Physicist: The issue here is the equinoxes are the two days of the year when the length of the day should be exactly as long as the night. And yet you’ll find that on the equinox the day is always slightly longer than 12 hours. As it happens, there’s nothing particularly special about the exquini. There’s just more day... | <urn:uuid:2f4e7b3e-b5e8-4811-899f-b9c96fd3a5d7> | 2.953125 | 286 | Q&A Forum | Science & Tech. | 60.113007 |
1716, English astronomer
Edmond Halley noted,
"This is but a little Patch, but it shews itself to the naked Eye, when
the Sky is serene and the Moon absent."
Of course, M13
is now modestly recognized as the Great Globular Cluster in Hercules,
one of the brightest
star clusters in the northern sky.
Telescopic views reve... | <urn:uuid:3ea5baf3-1c0b-4979-a3e1-34c91d3d7476> | 3.203125 | 212 | Knowledge Article | Science & Tech. | 55.164781 |
One solar day on a planet is the length of time
from noon to noon.
A solar day lasts 24 hours on planet Earth.
On Mercury a solar day is about 176 Earth days long.
And during its
first Mercury solar day
the MESSENGER spacecraft has
imaged nearly the entire surface of the
to generate a global monochrome map at 250 meter... | <urn:uuid:223b6af5-facf-4efb-8944-62780d92c0f8> | 3.578125 | 196 | Knowledge Article | Science & Tech. | 42.861695 |
The pyloric network (Figure 1) is part of the stomatogastric ganglion (STG) of crustaceans . The network is a central pattern generator (CPG) that drives the muscles of the pylorus, which is a food filtering organ within the gastric system of these animals. The pyloric network is one of the most researched neural circu... | <urn:uuid:8e7f35e6-6e0e-4964-b844-9b03ff62065d> | 2.765625 | 519 | Academic Writing | Science & Tech. | 26.773542 |
The neutral theory of molecular evolution suggests that most of the genetic variation in populations is the result of mutation and genetic drift and not selection.
Basically, the theory suggests that if a population carries several different versions of a gene, odds are that each of those versions is equally good at pe... | <urn:uuid:a3ec3bc2-7990-4e40-8491-c8e0429e5f23> | 3.734375 | 200 | Knowledge Article | Science & Tech. | 27.5075 |
A function call terminates if it returns to its caller or throws an exception. A function call does not terminate if it goes into an infinite loop, halts execution of the program (gracefully or not), or jumps in such a way that it does not return or throw an exception that could be caught by its caller.
Taking terminat... | <urn:uuid:d93fab9c-06b5-4fd8-8d03-b62dd1dc859a> | 2.71875 | 253 | Documentation | Software Dev. | 53.607218 |
Researchers reported today that they have sequenced the genome of a brown algal model organism, identifying genetic and genomic features that help explain its evolutionary past and adaptation to its current environment.
Full-text access for registered users only.
Existing users login here.
New to GenomeWeb? Register he... | <urn:uuid:2722b373-643d-4dea-bf69-d444a72a18e0> | 2.796875 | 67 | Truncated | Science & Tech. | 22.198231 |
Off Chub Cay, Bahamas, Day 3, 1999
With great success finding Midas slitsnails, the team moves over shallower seas ready to search for Adanson's slitsnail. Today Pat and Steven get their chances to dive, along with Jerry and José. The sub dives to around 400 feet along a wall so steep it is sometimes undercut. What in ... | <urn:uuid:8c648be7-7d0d-4847-a2aa-abc3a2e52d8e> | 2.703125 | 582 | Nonfiction Writing | Science & Tech. | 62.835615 |
* Seismic Waves and Seismic Eruption are free demonstration programs available at: binghamton.edu
Transform- two plates slide past each other.
In this aerial view of the San Andreas Fault (transform) the trees in the orchard (dots) have been offset by the slipping of the plates. The Pacific Plate is to the left and the... | <urn:uuid:24596a87-1ff7-4f0f-9532-6a2f892462aa> | 4.25 | 1,871 | Tutorial | Science & Tech. | 62.71561 |
Early Warning Sign?
Wed Aug 08 19:03:05 BST 2007 by Luther J. Tallen
Could the vanishing of coral reefs have been an early warning sign of the earthquake that hit in the Indonesian area today (August 8-9, 2007)? Any temp difference in the water prior to the quake?
Sun Aug 19 11:23:11 BST 2007 by Patrick
this is a very ... | <urn:uuid:1b8ade5a-3c87-4485-bead-cb4556552a14> | 2.78125 | 337 | Comment Section | Science & Tech. | 82.889241 |
A view can become a page or a block. There is no difference in work between a page and a block. A page needs a path to display the page. A block is assigned to a region to display the page. There might be a few seconds different to set them up. After that, you can blocks in far more ways than usually shown in tutorials... | <urn:uuid:b833e175-0f06-496c-90a2-fc2151545197> | 3.421875 | 655 | Tutorial | Software Dev. | 58.476772 |
Revista Brasileira de Biologia
Print version ISSN 0034-7108
ARENZON, A.; PERET, A. C. and BOHRER, M. B. C.. Growth of the annual fish Cynopoecilus melanotaenia (Regan, 1912) based in a temporary water body population in Rio Grande do Sul State, Brazil (Cyprinodontiformes, Rivulidae). Rev. Bras. Biol. [online]. 2001, vo... | <urn:uuid:a8ae3737-f436-4eb9-8efa-7f0d7a509bb8> | 2.9375 | 284 | Knowledge Article | Science & Tech. | 64.967222 |
Work is the transfer of energy.
In physics we say that work is done on an object when you transfer energy to that object. For introductory thinking, this is the best definition of work.
If you put energy into an object, then you do work on that object.
If a first object is the agent that gives energy to a second object... | <urn:uuid:cf9ab1cd-37ff-4b0f-9f09-763aded75109> | 4.25 | 999 | Knowledge Article | Science & Tech. | 65.464616 |
Mesh and bathymetry for the North Sea (left) and resulting tidal range and co-phase lines for the M2 tidal constituent (right).
ICOM is being used to study tidal dynamics in modern and geologically ancient basins. The model can be forced astronomically (the equilibrium tide approach) or using oscillating tidal boundary... | <urn:uuid:898569b1-d935-4d28-90de-1d8ed6773d9b> | 3.234375 | 432 | Knowledge Article | Science & Tech. | 39.061429 |
One of my favorite data structures is the binary heap. I first learned about it in my data structures class, and remember marveling at its simplicity and elegance. How could something so simple be so powerful and useful?
For those unfamiliar with the binary heap, it is a relatively simple data structure. It is a binary... | <urn:uuid:d43c4ff6-ff6b-45de-a7dc-036d0b7fef8b> | 3.1875 | 308 | Personal Blog | Software Dev. | 61.139517 |
A class that wraps a PointF representing a Polygon. The class members include:
- RectangleF Bounds
- float MinimumX
- float MaximumX
- float Minimum Y
- float Maximum Y
- int NumberOfPoints
- bool IsInBounds(PointF pt)
- bool Contains(PointF pt)
- PointF CenterPointOfBounds
- PointF CenterPoint // Not yet implemented
-... | <urn:uuid:5e569e7a-2ecd-49ae-a35d-ee884b91d5fc> | 2.84375 | 194 | Documentation | Software Dev. | 46.765577 |
Extensive defoliation of deciduous shrubs and trees in Southcentral Alaska has received considerable attention over the last couple of years. Even for those who may not be attentive to what is going on in their natural surroundings, the conspicuous patches of dieback on Skyline and Fuller Lakes Trail on the Kenai Natio... | <urn:uuid:4d0982f9-ea3c-451e-a71c-f74f56fd169a> | 3.25 | 1,166 | Personal Blog | Science & Tech. | 28.501677 |
Geostationary satelites are essentially for ever. This is becoming a problem since there are a limited number of places you want to put a geostationary satelite and most of them are full. Any collisions/explosions in geostationary mean debris will also stay there for a long long time.
For low earth orbit satelites it d... | <urn:uuid:a8c95ee9-5551-4d5c-afcb-9d000f72c307> | 2.71875 | 215 | Q&A Forum | Science & Tech. | 45.812763 |
CRUST & LITHOSPHERE:
THE ANELASTIC EARTH:
THE MANTLE TRANSITION ZONE:
Most seismologists focus on the elastic properties of the Earth like seimic wave speed. I prefer to examine seismic attenuation (a form of anelastic energy loss) and compare it to seismic velocity, which can help distinquish the cause of seismic anom... | <urn:uuid:240a1c07-9c29-4eb1-a43a-af944893d4e5> | 3.09375 | 1,702 | Academic Writing | Science & Tech. | 28.39484 |
Trinidad's Pitch Lake
The Caribbean country of Trinidad and Tobago has a natural wonder of the world - a Pitch Lake. It's a basin of emulsified asphalt. Pauline Newman reports on efforts to study the area and the hope of discovering new forms of life.
Robyn Williams: The Caribbean country of Trinidad and Tobago has its... | <urn:uuid:d654e5b0-0140-433e-9f56-d71f9fd10332> | 2.765625 | 1,701 | Audio Transcript | Science & Tech. | 52.622622 |
Seismology is the scientific study of earthquakes and the propagation of elastic waves through the Earth or through other planet-like bodies. The field also includes studies of earthquake effects, such as tsunamis as well as diverse seismic sources such as volcanic, tectonic, oceanic,...
, a microseism
is defined as a ... | <urn:uuid:eb4211a1-e78a-45d6-a65c-fe91f07dc169> | 3.984375 | 1,203 | Knowledge Article | Science & Tech. | 38.01347 |
U.S. generates 190 million tons of solid waste a year —
enough to fill a bumper-to-bumper convoy of garbage trucks
halfway to the moon. So why aren't we up to our necks in garbage?
Nature recycles garbage all the time, and this recycling
is essential to the availability of nutrients for living things.
are tiny bacteria... | <urn:uuid:0fc53d20-55fd-460e-8880-7a21fec6408a> | 4.0625 | 357 | Knowledge Article | Science & Tech. | 54.505386 |
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.
...to that of paramagnetic materials. Above a temperature called the Néel temperature, thermal motions destroy the antiparallel arrangement, and t... | <urn:uuid:56001932-e03a-40e7-9758-fa8ac3d9ea7e> | 2.90625 | 144 | Knowledge Article | Science & Tech. | 28.413871 |
A 10 m long pipe has an inside radius of 70 mm, an
outsideradius of 80 mm, and is made of stainless steel (k = 15
W/(m° C). Its inside surface isheld at 150° C, while
itsoutside surface is at 30°C. There is no heat generation, and
steady-state conditions hold.Compute the rate at which heat is
being transferred across t... | <urn:uuid:928ff0c8-9e84-4936-b615-fdf38ddd7a54> | 2.96875 | 93 | Q&A Forum | Science & Tech. | 76.91375 |
In the last MVC post we looked at Filter Providers but didn’t really describe what filters were. Filters are special classes which can execute some functionality at certain points during each MVC request. Historically most filters have been attributes that you can apply to an action method or a controller class (not al... | <urn:uuid:55fab0cb-2fa7-409d-8229-2bccf447290c> | 3 | 1,221 | Personal Blog | Software Dev. | 41.952358 |
Creation of the Latent Image on the Film
An emulsion holding grains of photosensitive chemical compounds called silver halides is spread over a film or other material. Light coming through the camera lens from an object being photographed strikes certain areas of the film, rendering the silver halide grains in those ar... | <urn:uuid:f87e1b54-d2a4-42b6-8972-60fb1bb150b3> | 3.5 | 186 | Knowledge Article | Science & Tech. | 34.612178 |
Avoid arbitrary limits on the length or number of any data structure, including file names, lines, files, and symbols, by allocating all data structures dynamically. In most Unix utilities, “long lines are silently truncated”. This is not acceptable in a GNU utility.
Utilities reading files should not drop NUL characte... | <urn:uuid:bdcc8354-cc69-4fdc-8ca4-2fc21828e870> | 2.96875 | 1,057 | Documentation | Software Dev. | 49.407482 |
What is the shape of a suspended rope? Is there some
function that describes it?
Answer: it's the cosh curve!
y = cosh x
and suspending a rope in front of the transparency projection
so that the rope shadow can be compared!
This may be seen quite dramatically by putting up a
transparency of the catenary
Now, someone ma... | <urn:uuid:79c06ceb-5651-4b5e-9ed7-d8c261aca206> | 3.28125 | 218 | Tutorial | Science & Tech. | 64.076948 |
Thu Oct 21 13:09:11 BST 2010 by Jack Stephens
The author overlooks the numerous cases where similar environmental conditions seem to have led to animals representing different lines of descent converging on very similar looking phenotypes, for example penguins and the great auk. These cases seem to strongly suggest the... | <urn:uuid:c5ee9c17-360c-44fb-89cb-2fdde1be80cd> | 2.875 | 259 | Comment Section | Science & Tech. | 37.227753 |
Hungarian-born electrical engineer who won the Nobel Prize for Physics
in 1971 for his invention of holography, a system of lensless, three-dimensional
photography that has many applications.
In 1949 Gabor joined the faculty of the Imperial College of Science
and Technology, London, where in 1958 he became professor of... | <urn:uuid:4d14093d-960c-48d6-b1ca-ddcc7179ea36> | 2.796875 | 188 | Knowledge Article | Science & Tech. | 42.679625 |
This charming little video demonstrates the principle of resonant frequency using oscillating metronomes. The mechanical wind-up metronomes used worldwide during the dreaded Saturday piano lesson employ an inverted pendulum to keep even time intervals. The resonant frequency of the pendulum is adjusted by moving the ma... | <urn:uuid:0d45f902-4cbf-4795-94f7-c6c44c145371> | 3.5 | 473 | Personal Blog | Science & Tech. | 37.956335 |
The Eurasian minnow (Phoxinus phoxinus) is a species of freshwater fish. It is a member of the carp family (family Cyprinidae) of order Cypriniformes, and is the type species of genus Phoxinus. It is ubiquitous throughout much of Eurasia, from Britain and Spain to eastern Siberia, predominantly in cold 53.6- 68°F (12″... | <urn:uuid:d581bf7a-51c1-4a34-a2ed-9fda30454870> | 3.46875 | 312 | Knowledge Article | Science & Tech. | 48.737127 |
Mathematics & Physics articlesPhysicists create new form of matter
MIT scientists have brought a supercool end to a heated race among physicists: They have become the first to create a new type of matter, a gas of atoms that shows high-temperature superfluidity.
Can an electron be in two places at the same time?
In som... | <urn:uuid:9a053eaa-eddc-4c63-b0f4-c0b26d407337> | 3.21875 | 1,355 | Content Listing | Science & Tech. | 22.505844 |