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Finitely generated groups and their subgroups are important domains in GAP. They are represented as permutation groups, matrix groups, ag groups or even more complicated constructs as for instance automorphism groups, direct products or semi-direct products where the group elements are represented by records.
Groups ar... | <urn:uuid:f4807005-5d79-49e9-92b5-46ccb0c18b36> | 3.453125 | 484 | Documentation | Software Dev. | 51.76049 |
Visit additional Tabor Communication Publications
August 19, 2010
OAK RIDGE, Tenn., Aug. 19 -- Buried in mountains of meteorological and hydrological data are likely clues that could help in predicting floods, hurricanes and other extreme weather events.
Through a new multi-institution project that includes the Univers... | <urn:uuid:6d30f491-01d6-4149-97de-b7e34cf913b1> | 2.953125 | 1,338 | Content Listing | Science & Tech. | 21.338296 |
If you want to learn a science, astronomy is the place to start. For most of what we do in this class higher mathematics is not a prerequisite (although being comfortable with numbers is helpful). Astronomy is a science based on geometrical, and often very visual, models. You will find that it's important to be able to... | <urn:uuid:2692e778-2a68-4f81-bab4-80bffdbe6b8c> | 4.125 | 3,057 | Tutorial | Science & Tech. | 63.034634 |
Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °
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With these problems I first work out the whole circumference, and then work out the fraction for the arc.
So cancel a 2 top and bottom and it's ... | <urn:uuid:7734ba0f-9f73-4b3d-b478-df78f95818bd> | 2.84375 | 325 | Comment Section | Science & Tech. | 89.071872 |
Editorial: "Wild weather: Extreme is the new normal"
Explore our interactive map: "Your warming world"
THE year has just begun, yet it is already shaping up to be an unusual one. Millions of people in Australia, Brazil, China and the US are having a rough January as extreme weather events wreak havoc around the world.
... | <urn:uuid:880a0656-42b2-4f70-82c8-efa28a3e9dd1> | 2.921875 | 198 | Truncated | Science & Tech. | 43.085761 |
In the 1850s, Robert Bunsen and Gustav Kirchhoff devised the first working spectroscopes. Two decades later, Georg Dragendorff and other scientists began using spectroscopy for medical research and criminal investigations.
The fields of toxicology and serology—the study of blood and other body fluids—were the first to ... | <urn:uuid:7db3dde3-2ce0-4412-bcba-13ed8c28e33a> | 3.4375 | 237 | Knowledge Article | Science & Tech. | 29.070402 |
There's a very cool slideshow on the Discovery Channel site in recognition of Earth Day 2009. The collection of photos that make up the "On Earth Day, a Bird's-Eye View" slideshow are beautifully done and are accompanied by explanatory text that highlight the impact of climate change -- from dust storms to floods to vo... | <urn:uuid:90686167-e36a-46a5-88ee-2d71bf09b28f> | 3.453125 | 210 | Personal Blog | Science & Tech. | 54.361753 |
Highway to the Danger Zone
"The further on the edge, the hotter the intensity," sings Kenny Loggins in "Danger Zone," a song made famous by the movie Top Gun. The same words ring true for young, cooler stars like our sun that live in the danger zones around scorching hot stars, called O-stars. The closer a young, maver... | <urn:uuid:543e3947-117c-4347-b0ec-4df0ce31371b> | 3.828125 | 440 | Truncated | Science & Tech. | 61.084665 |
Average temperatures have climbed 1.4 degrees Fahrenheit (0.8 degree Celsius) around the world since 1880, much of this in recent decades, according to NASA's Goddard Institute for Space Studies.
The U. S. is the top oil consuming nation, using about 25% of total world oil production.
The Earth has been around for 4.6 ... | <urn:uuid:16f05c68-6522-46c2-bb3c-a5127d641a4c> | 3.296875 | 174 | Listicle | Science & Tech. | 71.041923 |
Let m(t) be the mass as a function of time t and let v(t) be the velocity as a function of time t, then the momentum as a
function of time t is p(t) = m(t)*v(t). Further let ' represent one derivative with respect to time, i.e. the instantaneous time
rate of chang of a quantity, then
F1 + F2 + ... + Fn = p'(t) = [m(t)*... | <urn:uuid:c08a0880-e07b-448a-b9d7-9c073a1510a4> | 3.84375 | 1,080 | Comment Section | Science & Tech. | 67.440313 |
Catalog of Earth Satellite Orbits
Just as different seats in a theater provide different perspectives on a performance, different Earth orbits give satellites varying perspectives, each valuable for different reasons. Some seem to hover over a single spot, providing a constant view of one face of the Earth, while other... | <urn:uuid:42895869-e0fc-46e6-bee3-f9a6d53ad5a9> | 4.1875 | 593 | Knowledge Article | Science & Tech. | 38.601995 |
Abundance in oceans
ppb by weight
These data reflect the average composition of ocean water. Values vary slightly with location and depth. Units are parts per billion by weight.
Data given in different sources vary somewhat, reflecting the difficulty in assessing these numbers. Values given here are estimates of the av... | <urn:uuid:d3d20be7-ce20-41c9-b119-23b956c3a946> | 2.859375 | 340 | Knowledge Article | Science & Tech. | 40.001087 |
This pie chart shows the relative likelihood of observing particular other species commonly observed near Salmo trutta fario
These species are those which most commonly occur in our observation database near Salmo trutta fario. Observations favor some phyla over others. Typically Bacteria, Fungi, Protozoa, and Arthropo... | <urn:uuid:8da54ae0-ad20-4b77-beb9-c43b61f6afd3> | 2.84375 | 476 | Structured Data | Science & Tech. | 23.689839 |
Round tubs teem with live fish for sale since carp is the traditional centerpiece of the Christmas feast in much of central Europe. Oddly enough, when contained in these round tubs, the carp tend to align themselves with an invisible north-south line. One might assume this is because the fish are seeking Santa in his N... | <urn:uuid:17a3658f-4c96-4b61-bbf4-b1142f60852a> | 2.921875 | 2,471 | Personal Blog | Science & Tech. | 47.774281 |
This post is going to be short and sweet, because the point is very simple: If you use a functional programming language (and, if you want to learn to think outside of the Delphi box, you should), then you will be using garbage collection.
There are many reasons why this is the case. Garbage collection is a core featur... | <urn:uuid:a8065ee0-b2b9-4004-8e7e-9fa716391ae1> | 2.984375 | 439 | Personal Blog | Software Dev. | 30.991394 |
Pub. date: 2010 | Online Pub. Date: December 16, 2009 | DOI: 10.4135/9781412972000 | Print ISBN: 9781412940818 | Online ISBN: 9781412972000 | Publisher:SAGE Publications, Inc.About this encyclopedia
Animal Color Vision
Gerald H. Jacobs
Under daylight conditions, most humans experience a richly colorful world in which o... | <urn:uuid:b967d73c-675b-4d4c-9e33-4fdc72c46f07> | 3.6875 | 235 | Knowledge Article | Science & Tech. | 44.708484 |
Dangling ends are nucleotides that stack on the ends of helices. In secondary structures, they occur in multibranch and exterior loops. They occur as either 5' dangling ends (an unpaired nucleotide 5' to the helix end) or 3' dangling ends (an unpaired nucleotide 3' to the helix end). In RNA, 3' dangling ends are genera... | <urn:uuid:a9a0a0a1-35d6-435d-abf4-c1278b31b59e> | 3 | 140 | Knowledge Article | Science & Tech. | 64.589 |
Case Study: Students Investigate the Impact of Cities on Temperature
Worldwide Surface Temperature Field Campaign
On the coldest day of the winter of 2000, a group of dedicated, excited high school students congregated at a research arboretum to meet Dr. Kevin Czajkowski, a remote sensing scientist and meteorology prof... | <urn:uuid:01de3f2e-688b-4b2d-9483-68a35b66245c> | 3.640625 | 401 | Academic Writing | Science & Tech. | 24.203346 |
Every time I leave the nearby city of Grenoble, to return to Choranche, I drive alongside a vast scientific research zone, snuggled in the northern tip of the big triangle located between the two great waterways known as the Snake and the Dragon: that's to say, the Isère and the Drac. (The latter looks and behaves like... | <urn:uuid:f9d699a2-eb55-42db-beae-f60ab6c0a66f> | 3.109375 | 903 | Personal Blog | Science & Tech. | 46.650357 |
Nothing bad will happen to the Earth in 2012. Our planet has been getting along just fine for more than 4 billion years, and credible scientists worldwide know of no threat associated with 2012.
For any claims of disaster or dramatic changes in 2012, where is the science? Where is the evidence? There is none, and for a... | <urn:uuid:cad2e919-119d-489f-bd7c-802b9ba7c34f> | 3.3125 | 544 | Knowledge Article | Science & Tech. | 50.146706 |
Mission Type: Impact
Launch Vehicle: 8K78 (no. L1-7)
Launch Site: Tyuratam (Baikonur Cosmodrome), NIIP-5 / launch site 1, USSR
Spacecraft Mass: c. 645 kg
Spacecraft Instruments: 1) three-component magnetometer; 2) variometer and 3) charged-particle traps
Deep Space Chronicle: A Chronology of Deep Space and Planetary Pr... | <urn:uuid:130e80bc-9ac9-4ccb-aed0-5fadf9d6407a> | 3.4375 | 365 | Knowledge Article | Science & Tech. | 50.630577 |
Lesson Plans >
& Celcius Conversion
convert between Fahrenheit and Celcius temperatures - may
not work with some older browsers.
Objective: Students will learn how latitude affects weather patterns.
Resources: Teacher: World globe.Students: paper and
Teacher Preparation: This lesson can follow an introductory lesson
on... | <urn:uuid:173a7850-9894-4620-a323-855ed9938f01> | 4.125 | 459 | Tutorial | Science & Tech. | 42.612082 |
Serial Dilutions Made Easy
Author: Jan Hilten and Carol Sanders
Woodrow Wilson Biology Institute
Many areas of science use serial dilutions in the preparations for different experiments. This exercise is presented as an aid for the teacher in helping his/her students improve their skills and more quickly understand the... | <urn:uuid:e9041cf8-bfda-4acf-859a-c6231c7c861a> | 4.0625 | 1,098 | Tutorial | Science & Tech. | 76.674 |
The Power of Symmetry
Why Beauty is Truth: A History of Symmetry. Ian Stewart. xiv + 290 pp. Basic Books, 2007. $26.95.
Symmetry is a fundamental concept pervading both science and culture. In popular terms, symmetry is often viewed as a kind of "balance," as when Doris Day's character in the 1951 movie On Moonlight Ba... | <urn:uuid:62d104d5-42a1-4c4b-8352-1de7fa03c0bd> | 3.5625 | 1,544 | Content Listing | Science & Tech. | 43.108552 |
UVa Astronomy News Picture Archive
This is a small extract from a huge mosaic of images of the deep universe. The original mosaic was assembled from hundreds of exposures taken with the new Wide Field Camera 3 (WFC3) and the Advanced Camera for Surveys (ACS) on the Hubble Space Telescope. More than 12 billion years of ... | <urn:uuid:d8556211-2d20-4d21-b794-216dbee92134> | 3.453125 | 413 | Truncated | Science & Tech. | 45.884474 |
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.
maintenance of biological rhythm
The internal mechanism by which such a rhythmic phenomenon occurs and is maintained even in the absence of the ap... | <urn:uuid:976cf377-eed2-4f65-9bbe-4ed21d0bcad8> | 3.3125 | 222 | Truncated | Science & Tech. | 48.998939 |
Facts about the Definition of the Element Zinc The Element Zinc is defined as... A bluish-white, lustrous metallic element that is brittle at room temperature but malleable with heating. It is used to form a wide variety of alloys including brass, bronze, various solders, and nickel silver, in galvanizing iron and othe... | <urn:uuid:7a2a6cb1-547f-4185-bec1-4a63817c45f8> | 3.625 | 834 | Knowledge Article | Science & Tech. | 42.64742 |
The symbol is usually used in mathematics as a part of other symbols, as an indication of something that may be arbitrarily large. For example, the customary interval notation refers to the set of all real numbers greater than or equal to the number a. That is, is the set of numbers starting at a, and moving arbitraril... | <urn:uuid:1d827838-e4cb-470c-9f6a-3756e6ba54f4> | 3.828125 | 763 | Knowledge Article | Science & Tech. | 41.989123 |
Do you enjoy walking through piles of autumn leaves and hearing the crunch underneath your feet? Those leaves you're stepping on might actually be home to a wide variety of plants and animals! Leaves, twigs and pieces of bark that have fallen to the ground make up leaf litter. Leaf litter is an important component of h... | <urn:uuid:9ced01ac-9174-45ab-9081-a6da6c884204> | 3.9375 | 1,326 | Tutorial | Science & Tech. | 46.988821 |
Oxygen, O2, is a colourless odourless gaseous main group element
which belong to
Group VIb of the
Atmospheric oxygen is of vital importance for all aerobic organisms.
For industrial purposes, oxygen is obtained by fractional distillation
of liquid air. It is used in metallurgical processes,
in high-temperature flames a... | <urn:uuid:318b0ddd-2d0a-43ca-9efd-9731b5de4069> | 3.65625 | 2,143 | Knowledge Article | Science & Tech. | 33.634124 |
A group of ASP files that work together to perform some purpose is called an application. The Application object is used to tie these files together.
An application on the Web may consists of several ASP files that work together to perform some purpose. The Application object is used to tie these files together.
The Ap... | <urn:uuid:3fe14597-de62-4cb0-bd6e-30a4129adc84> | 2.90625 | 467 | Knowledge Article | Software Dev. | 34.890513 |
BC8 Si has a small Fermi surface and thus electronically can be regarded as a semimetal as suggested by its band structure. Its fourfold coordination and brittleness suggest that it is predominantly held together by directional covalent bonds. To resolve this apparent contradiction, the valence charge density has been ... | <urn:uuid:3b65cc55-9f7d-47ce-86c0-e67cb37fa57a> | 3.234375 | 447 | Academic Writing | Science & Tech. | 39.779765 |
PL/SQL declares a cursor implicitly for all SQL data manipulation statements, including quries that return only one row. However,queries that return more than one row you must declare an explicit cursor or use a cursor FOR loop. Explicit cursor is a cursor in which the cursor name is explicitly assigned to a SELECT sta... | <urn:uuid:1efa0e6b-81da-4999-9755-4bdd24f939b2> | 3.09375 | 383 | Q&A Forum | Software Dev. | 43.32872 |
The rest of the examples in this section will assume that a file object called f has already been created.
To read a file's contents, call f.read(size), which reads some quantity of data and returns it as a string. size is an optional numeric argument. When size is omitted or negative, the entire contents of the file w... | <urn:uuid:79481f1d-f493-4e07-bcdb-16d3ee2f8b92> | 4.28125 | 715 | Documentation | Software Dev. | 72.861673 |
by Don Stewart
Haskell is a functional language built for parallel and concurrent programming. You can take an off-the-shelf copy of GHC and write high performance parallel programs right now. This tutorial will teach you how to exploit parallelism through Haskell on your commodity multicore machine, to make your code ... | <urn:uuid:8745b819-48c8-46c7-bb1b-5a53cdf18ea7> | 3.515625 | 145 | Content Listing | Software Dev. | 41.332655 |
This unnamed 740 m diameter crater has bouldery walls and is morphologically similar to many <1 km diameter craters in the mare. Image width is 847 m, LROC NAC M127328861L [NASA/GSFC/Arizona State University].
The LROC NAC has imaged thousands of blocky craters similar to this example found in Oceanus Procellarum. The ... | <urn:uuid:77f7b522-f40b-4b7c-9936-f58b946de627> | 3.203125 | 337 | Knowledge Article | Science & Tech. | 43.074955 |
This should enable exotic new states of matter and enable better quantum computers.
Nature - Orbital excitation blockade and algorithmic cooling in quantum gases
1. the researchers cooled atoms of rubidium with lasers. When set up properly, these beams can force atoms to glow in a way that makes them emit more energy t... | <urn:uuid:7016348e-28e8-4af8-8a9f-62212de1feb4> | 3.734375 | 590 | Truncated | Science & Tech. | 23.557922 |
First of all, the scheme of the CERN accelerator complex you posted contains not only that single chain which brings the protons to the LHC, but also several other chains which are used for many lower energy experiments conducted in parallel at CERN.
But let's focus on the LHC accelerator chain: why do we need several ... | <urn:uuid:dfb98e68-cf87-4ac7-a550-a5332d5efa2f> | 3.140625 | 531 | Q&A Forum | Science & Tech. | 34.684972 |
Photons are massless, therefore, in the Standard Model, the Higgs boson does not couple directly to photons. Instead, the decay of the Higgs into 2 photons is a loop mediated process. It happens to be dominated by two contributions: one, larger, from the W boson, and the other, 5 times smaller, from the top quark. Inci... | <urn:uuid:a8b19fb5-df30-42f1-a459-8fc9cc3113e1> | 3.109375 | 248 | Personal Blog | Science & Tech. | 54.719423 |
In this section, you will learn to convert Time to
seconds. An hour has 3600 seconds and a minute has sixty seconds.
Description of program:
This example helps you in converting a Time to seconds. Here, first of all we have changed Hours to minutes, minutes to seconds etc as shown below. We also want that the Time woul... | <urn:uuid:3510fc0b-5a9b-48bb-97a6-eb04e37b1a34> | 3.625 | 151 | Documentation | Software Dev. | 60.824237 |
Researchers have developed a technique that takes brain mapping to a new level, allowing them to label individual neurons in the brain in different colors. The technique, dubbed 'brainbow' by the researchers involved, could help scientists gain a better understanding of brain function than previous staining techniques ... | <urn:uuid:9f6651c2-f988-4ab1-bae4-abe04c83793f> | 3.34375 | 175 | Truncated | Science & Tech. | 31.799059 |
Global warming less extreme than feared?
Policymakers are attempting to contain global warming at less than 2°C. New estimates from a Norwegian project on climate calculations indicate this target may be more attainable than many experts have feared.
Internationally renowned climate researcher Caroline Leck of Stockhol... | <urn:uuid:76462052-2a23-4bc0-8dc7-787f02225343> | 3.765625 | 1,661 | Knowledge Article | Science & Tech. | 29.070356 |
joeberry at biosphere.Stanford.EDU
Sun Sep 28 22:58:57 EST 1997
Dear Photosynthesis Researchers,
I received an interesting question that might be a useful topic for
discussion on the photosynthesis net. The question comes from an
astronomer via Maxine Singer, President of the Carnegie Institution.
Allan Sandage at the ... | <urn:uuid:e70d28ea-f5ec-4f0f-a4c9-eec09e018a7b> | 2.859375 | 704 | Comment Section | Science & Tech. | 48.41918 |
- About Us
- SW Climate
Global warming inspires a look at solar, wind energy
Published January 23, 2007
Now that many Americans accept the reality of global warming, they want to do something about it. In the Southwest, that desire is being harnessed into initiatives to improve energy efficiency and boost alternative f... | <urn:uuid:65569618-4dab-4c3b-94a2-7198c79498e0> | 2.984375 | 3,019 | Knowledge Article | Science & Tech. | 37.751773 |
Few topics in science excite the popular imagination more than antimatter, perhaps because the idea sounds like science fiction that you can really believe in. For the same reason, it should not be surprising that when a story about antimatter surfaces in the news cycle—as regularly happens—the real science sometimes g... | <urn:uuid:8d9509d5-97c8-4f33-94e7-66d97f6101c7> | 3.34375 | 3,643 | Knowledge Article | Science & Tech. | 42.148036 |
Changing locale-specific information by loading the appropriate DLL
In Symbian OS locale-specific information is built as a DLL. The user can change the locale information related to a specific country by loading the appropriate DLL.
The convention followed in naming the DLL is as follows:
elocl.language_index - The li... | <urn:uuid:5c0b50eb-f842-4446-94bc-edfb246aaf9e> | 3 | 553 | Documentation | Software Dev. | 36.364379 |
Lab-3: Properties of the Discrete Fourier Transform
The goal of this lab is to look at different properties of the Discrete
3.1: Spectral leakage
- Create a cosine of 0.1 second at a sampling rate of 44100 Hz, with
a frequency multiple of 44100/1024, for example
- x1 = cos(2*pi*f*t) where t = [0:1/44100:0.1-1/44100]
- ... | <urn:uuid:d6e52654-cbee-4620-845c-2e769fcb71ba> | 3.796875 | 1,151 | Tutorial | Science & Tech. | 68.874118 |
The Center of Mass (center of gravity) of a solid is similar to the Centroid of Solid. However, calculating the centroid involves only the geometrical shape of the solid.
The center of gravity will equal to the centroid if the body is homogenous i.e. constant density.
Integration formulas for calculating the Center of ... | <urn:uuid:23055cfe-34c5-4f72-9620-3e9e70039c1e> | 3.40625 | 74 | Knowledge Article | Science & Tech. | 42.884857 |
Sunlight and Clouds
A cloud is a visible mass of water droplets or frozen ice crystals suspended in the Earth's atmosphere above the surface of the Earth or other planetary body. On a cloudy day the surface under the clouds appears darker and cooler. Atmospheric scientists trying to pin down how clouds curb the amount ... | <urn:uuid:d72546df-d122-46ef-b8bf-65d9ff570bd2> | 4.34375 | 1,167 | Truncated | Science & Tech. | 40.549445 |
The availability of online planning applications, wildlife and forest data, and map resources makes planning conservation projects simple. Sharing your experiences and learning from others can spread awareness of conservation issues and increase understanding of how GIS technology can aid conservation efforts.
- Societ... | <urn:uuid:ebaf87e6-0c89-482e-9597-2ef066f6b9d1> | 3.453125 | 429 | Content Listing | Science & Tech. | 23.831769 |
Get flash to fully experience Pearltrees
by Gilles Brassard Département IRO, Université de Montréal.
The idea that a vote cast by a person remains the same after he submitted it is taken very seriously in any democracy. Voting is the right of the citizen, and it's how we choose the people who make important decisions o... | <urn:uuid:814c5a3f-10db-468e-922c-522b0a9b416c> | 3.3125 | 697 | Knowledge Article | Science & Tech. | 40.009008 |
of the Swamps
How early vertebrates established a footholdwith all 10
Paleontologists have found the
earliest known vertebrate adapted to life on land.
Paton, R.L., T.R. Smithson, and J.A. Clack. 1999. An amniote-like
skeleton from the early Carboniferous of Scotland. Nature 398(April
Ahlberg, P.E., and A.R. Milner. 19... | <urn:uuid:e405ab67-107e-44bb-ae6a-c05673262589> | 3.21875 | 323 | Content Listing | Science & Tech. | 67.641181 |
Close-up of Castor and
Pollux showing the contrast in colors.
In March, Gemini - "The Twins"
- is high in the sky in the early evening. On closer inspection,
the twins, Castor and Pollux, are not identical. Castor is much
hotter than Pollux and as a result the color of castor is quite blue,
whereas Pollux is a yellowis... | <urn:uuid:f0d15e8a-1fc9-490f-b8a7-c5d9776e5c81> | 2.75 | 336 | Personal Blog | Science & Tech. | 47.205866 |
This week's cartoon describes compressed air, a potentially effective way to store excess energy from renewable sources and provide power on demand. Currently, renewable sources of energy, like wind and solar, can produce a lot of power, but only when the sun is shining or the wind is blowing. Using the energy when we ... | <urn:uuid:44fcdbf1-869b-4cb5-9a48-5b66e1a3c8ee> | 3.5 | 560 | Personal Blog | Science & Tech. | 45.757308 |
The 70 meter deep space station antenna named 'Mars', a.k.a. DSS-14
Good morning everyone.
Today I thought that we’d take a quick look at the network of instruments that send and receive data to our spacecraft, satellites, and space probes, including the Mars Science Laboratory, also known as the Curiosity rover. In pa... | <urn:uuid:780607d9-df52-4e8f-b08b-59a7280b430d> | 3.296875 | 2,097 | Content Listing | Science & Tech. | 50.298751 |
In what some are calling a major breakthrough for renewable energy, MIT chemists Daniel Nocera and Matthew Kanan discover a new catalyst that speeds up the splitting of water into oxygen and hydrogen. The discovery may heighten interest in pollution-free fuel cell vehicles, which generate energy by combining hydrogen a... | <urn:uuid:c65d7bf2-baa7-4216-87ba-54fce994b195> | 3.734375 | 260 | Truncated | Science & Tech. | 36.423699 |
While there has been some minor solar activity lately, the sun has been actively evolving for hundreds of millions if not billions of years. On September 1, 1859 a massive solar flare known as the Carrington Event was felt around the globe. Beginning August 28 and lasting until September 2, sun spots and flares were re... | <urn:uuid:f0e575ad-131d-4429-ba2d-fcb472472e6d> | 3.59375 | 466 | Personal Blog | Science & Tech. | 29.922609 |
5.8 Refractive Index and Snells Law
For physicists, it is good to know that waves react, thought it is more helpful to know when, and by how much. Refraction can be quantified by relating the angle of incidence (to the boundary between the two media in question) to the angle of refraction.. These, and the refractive in... | <urn:uuid:14c57f8a-227d-4040-b76c-3ba1fa17cacd> | 4.625 | 361 | Knowledge Article | Science & Tech. | 60.991504 |
The average rainforest is very moist, receiving over 80 inches (203 centimeters) annually. Some rainforests can even receive more rain than the average rainforest. For instance, the Colombian Choc' gets more than 360 inches (914 centimeters) of rain a year. Cloud forests usually do not get much rain, however they do ge... | <urn:uuid:7c3a38a3-7a43-48c8-989b-7e43db3923dd> | 4.03125 | 413 | Knowledge Article | Science & Tech. | 57.97756 |
Part 2—Open and Explore Ozone Images
Step 1 – Open Images in ImageJ
- Launch ImageJ by double-clicking its icon on your desktop (Mac or PC) or by clicking the icon in the dock (Mac) or the Start menu (PC).
- Start ImageJ, choose File > Import > Image Sequence.... Browse to the location where you saved the TOMS images, ... | <urn:uuid:bd065c2e-5ec6-4021-9a88-6ea07d4007da> | 3.078125 | 813 | Tutorial | Science & Tech. | 59.674043 |
Pseudo-Dipole Signal Removal from WMAP Data
It is discovered in our previous work that different observational systematics, e.g., errors of antenna pointing directions, asynchronous between the attitude and science data, can generate pseudo-dipole signal in full-sky maps of the cosmic microwave background (CMB) anisotr... | <urn:uuid:3fd51e24-0fdd-4f51-80c3-7204879b0674> | 2.6875 | 165 | Academic Writing | Science & Tech. | 26.273007 |
Nitrate (NO3) is a compound that is comprised of nitrogen and oxygen. Nitrogen comes from decomposing organic materials like manure, plants, and human wastes. Often the nitrogen (N) is derived from ammonia (NH3) or ammonium (NH4).
Plant species need nitrogen to form amino acids and proteins, which are essential for pla... | <urn:uuid:94e6bf1d-d90d-4b12-a1f9-17961857e905> | 4.28125 | 391 | Personal Blog | Science & Tech. | 31.53621 |
The Gravity Theory Of Gigantism and Extinction
by John Stojanowski 1/20/07
This document is the third in a series entitled “The Rise And Fall Of The Dinosaurs.” Parts I and II describe a new theory that explains the gigantism of dinosaurs during the Mesozoic Era and how it related to their eventual extinction. The theo... | <urn:uuid:0935d491-b886-4f53-9b0a-aba7d623c9c0> | 3.375 | 2,225 | Academic Writing | Science & Tech. | 23.584203 |
The ability to manipulate arrays in Perl is just beautiful. You can dynamically add/remove elements from the end of the array using PUSH/POP, and dynamically move elements into the front of the array using UNSHIFT/SHIFT. Arrays can be indexed positively from the beginning of the array, or with negative indices from the... | <urn:uuid:d5289367-2163-4a53-a32e-fa97b724f40c> | 2.71875 | 861 | Personal Blog | Software Dev. | 47.99609 |
You cracked a puzzle about the structure of strange crystals called approximants that had gone unsolved for eight years. Tell us more.
Sven: Approximants are related to quasicrystals, which are ordered atomic structures, but with symmetries that were believed to be impossible, for example fivefold symmetry. The approxi... | <urn:uuid:68c4de39-7837-420c-aa95-97063763bd34> | 2.734375 | 242 | Truncated | Science & Tech. | 60.088069 |
In this tutorial, We will introduce you about the readonly attribute of the <textarea> tag in html5. This attribute is used to specify that the input textarea is used only for reading. The user is not able to input any character or editing in the textarea.
The attribute is used as in the <textarea> tag:
|<textarea read... | <urn:uuid:11c9ba55-cd40-42d9-a9d9-78b7db60170e> | 2.6875 | 159 | Documentation | Software Dev. | 48.443362 |
Richard Gross, a geophysicist at NASA's Jet Propulsion Laboratory who studies the earth's rotation, explains.
Scientific American: Did the undersea earthquake affect the earth's rotation?
Models predict that the earthquake should have affected rotation of the earth by shortening the length of a day by about three micro... | <urn:uuid:ba534f4e-8239-4fb1-8cd7-85b0f90f81bb> | 4 | 439 | Audio Transcript | Science & Tech. | 50.299861 |
El Niño and Snow
Will El Niño bring us more snowfall this year?
It's been a record setting December in terms of snowfall. North America's weather is being effected by El Niño. But is El Niño solely responsible for bringing us all this snow? I spoke to Jared Klein at the National Weather Service to find out.
He explains... | <urn:uuid:f61b07a5-240c-47e1-a38b-acc753cb1d4c> | 3.296875 | 556 | Personal Blog | Science & Tech. | 61.193062 |
The Facts About Radiation Damage
How does radiation hurt a living cell?
Can cells repair themselves?
Radiation Dose Limits for Astronauts
Radiation Dose Limits for the Rest of Us
How Much Radiation Are You Exposed To?
Space Weather Impacts on Astronauts
What are lethal levels of radiation?
How serious can solar protons... | <urn:uuid:dfd235a7-ff08-485b-a5a7-c0af1ee90a62> | 3.34375 | 198 | Content Listing | Science & Tech. | 49.195393 |
ASTR 1040 Spring, 2005
1.a. Estimate the hydrogen-burning lifetime of a star of 15 solar masses and a luminosity 10,000 times greater than the solar luminosity.
This is easiest to do by comparing with the Sun, using the relationship t = to(M/L), where t_o is the Sun's lifetime of 10^10 years, and M and L are the mass a... | <urn:uuid:bc127e1d-86ec-4554-a4a6-be378e97e71a> | 3.40625 | 3,455 | Tutorial | Science & Tech. | 104.917132 |
Dictionary and translator for handheld
New : sensagent is now available on your handheld
A windows (pop-into) of information (full-content of Sensagent) triggered by double-clicking any word on your webpage. Give contextual explanation and translation from your sites !
With a SensagentBox, visitors to your site can acc... | <urn:uuid:e41989f1-e5e7-4125-a86d-df05699253f9> | 2.75 | 1,280 | Knowledge Article | Software Dev. | 26.295092 |
Why do we Need Dark Energy to Explain the Observable Universe?
Posted on September 27, 2009 Comments (2)
An accelerating wave of expansion following the Big Bang could push what later became matter out across the universe, spreading galaxies farther apart the more distant they got from the wave’s center. If this did ha... | <urn:uuid:334566e3-90a0-4a10-8c4b-8d26dac42a9a> | 2.796875 | 299 | Comment Section | Science & Tech. | 43.888657 |
Suppose the elements of are . In other words the element in row , column is . Suppose also that the elements of are , and the elements of are
Now for each is formed when the elements of row of matrix are combined (by multiplication and addition) with the elements of . In other words:
And 's elements are a re-arrangemen... | <urn:uuid:32e0a67e-9139-4c21-8212-7501fc0b51d3> | 3 | 134 | Q&A Forum | Science & Tech. | 55.381985 |
Magnetic Field Penetration
Date: April 28, 2011
Will magnetic fields pass through a nonmagnetic metal and
>still be attracted to a magnet on the other side?
Yes. happens all the time.
Just try putting an aluminum sheet between a magnet and some iron,
or between two magnets.
If the Aluminum is holding still, the blindfo... | <urn:uuid:378e18b5-9de5-4ca9-bede-63e895638ff1> | 2.953125 | 370 | Q&A Forum | Science & Tech. | 60.706634 |
Forces and Photons
Country: United Kingdom
Date: Summer 2012
Forces between elementary particles are mediated via particles. For example, the Electromagnetic force is mediated via photons. What I want to know is - how do the photons know where to go? The cannot see/feel the other particle. The cannot feel its effect be... | <urn:uuid:6b01b39b-f41e-4edb-9cab-f547d72136a9> | 3.296875 | 363 | Knowledge Article | Science & Tech. | 56.648173 |
To understand the property of refraction through rainbows, first you could think Raindrops as falling prism-like objects... The same answer here - Refraction & Dispersion of light
(Wikipedia & Howstuffworks has a pretty good article on it...)
These images show the refraction and dispersion of light by raindrops (just l... | <urn:uuid:6b473243-04d4-494f-9a53-53c9823a4fd5> | 4 | 618 | Q&A Forum | Science & Tech. | 64.978406 |
An anonymous reader lets us know about the initial release of data from the Kepler spacecraft, launched in the spring of 2009, which has been hunting extrasolar planets. The instrument has found 752 candidates to examine in its first 43 days of operation. This is exciting news, because even if only half of the possibil... | <urn:uuid:9905e869-fdbb-4b11-84ed-5cd209e62fab> | 2.890625 | 187 | Comment Section | Science & Tech. | 51.638225 |
of surface tension demonstration using water that is being
held in place by a metal loop.
Space Chronicles #17
Previous | Next >
ISS Science Officer Don Pettit
I set out to explore one thing and discovered another. And what
was discovered was more interesting than the prosaic task I had
planned. What I had intended was... | <urn:uuid:b26cfd69-3564-4ca9-a88f-b49c454641f3> | 3.203125 | 2,732 | Nonfiction Writing | Science & Tech. | 40.62563 |
[This is a slightly more considered summary of recent work on cryoprotectants, which appears as my Crucible column in the May issue of Chemistry World. The links to the papers discussed can be found in the previous blog entry below.]
When the going gets tough, the tough get sweet. There are many physiological responses... | <urn:uuid:f5d775dc-70e7-422f-acd6-731b2e08f2af> | 3.21875 | 1,334 | Personal Blog | Science & Tech. | 49.881982 |
By Wade Wilbur
For low-volume databases, those that are predominantly read and not written to, or database tables that are designed to not
be updated or only updated under rare circumstances, a DBA or developer may be interested
in being notified whenever the data in a particular table is modified. Or you may have cert... | <urn:uuid:df5b8c05-0585-442c-a3d0-5ecbbc1fad08> | 2.75 | 1,080 | Tutorial | Software Dev. | 46.189463 |
From a distance, it looks like a parking lot filled with over-sized television antennae. In actually it is the High Frequency Active Auroral Research Program or HAARP, a government research facility focused on physical and electrical properties of the earth's ionosphere. Set in the the beautiful Alaskan forest, HAARP i... | <urn:uuid:6660c064-59dd-41f0-a4ae-1e150310b5a1> | 2.703125 | 429 | Knowledge Article | Science & Tech. | 29.172326 |
Mount Rainier hasn't erupted in more than one
hundred years, yet ash-laden mudflows can still
run down it today.
This one, caught in action, was initiated by the
sudden release of water stored at the base of a
glacier. Outburst floods become debris flows by
picking up large quantities of ash and loose debris
as they mo... | <urn:uuid:0df026aa-99b2-439a-a059-719675d7e768> | 4 | 102 | Tutorial | Science & Tech. | 62.626514 |
Blow Wind, Blow!
- Most people think that Chicago is the windiest city in
the U.S. It's not. Boston is the windiest city. The numbers
below indicate the miles per hour of the winds for Boston
for a 2-week period. Use the information to make a stem and
leaf plot. Then find the range, median and mode.
22 35 27 15 38 32 2... | <urn:uuid:0b9e50e6-c645-4d2c-aaef-76dfdd45b7ed> | 2.953125 | 794 | Tutorial | Science & Tech. | 80.3337 |
NON-AGROBACTERIAL SPECIES FOR GENE TRANSFER TO PLANTS
P. Janaki Krishna
Agrobacterium tumefaciens is a common soil bacterium that causes crown gall disease by transferring some of its DNA to the plant host. This unique mode of action has enabled this bacterium to be used as a tool in plant breeding1. Many desired genes... | <urn:uuid:c3db2a10-a18d-49c5-89b6-c54b3576bd5a> | 3.359375 | 1,460 | Academic Writing | Science & Tech. | 32.716816 |
Guide for Beginning Fossil Hunters
Fossil GuideAdapted from ISGS Geoscience Education Series 15, 2002
by Charles Collinson
Long before the first humans appeared on Earth and such familiar features as our lakes and rivers were formed, the Earth was inhabited by plants and animals.
Even though humans are the only creatur... | <urn:uuid:7143da5d-8af3-4dbd-9fd5-71286aad21df> | 4.03125 | 739 | Truncated | Science & Tech. | 57.383694 |
Reads and (mostly) writes seismic data from and to files written by Landmark's (a subsidiary of Halliburton) Geoprobe software. This implementation is based on reverse-engineering the file formats, and as such, is certainly not complete. However, things seem to work.
DependenciesRequires python >= 2.5 and numpy. Some f... | <urn:uuid:c1043b59-e831-48f4-9b23-5a6ea7e6cdc4> | 2.6875 | 202 | Documentation | Software Dev. | 39.116303 |
The Other Global Warming.
I'm Bob Karson with the discovery files--new advances in science and engineering from the National Science Foundation.
(Sound effect: volcanic eruptions) Early Triassic period, 250 million years ago, massive volcanic activity spews enough molten rock to cover millions of square miles. Enough g... | <urn:uuid:e9d83880-ab09-41f5-96de-767081a41c69> | 3.71875 | 352 | Audio Transcript | Science & Tech. | 47.059321 |
Deep Water Circulation
Early modeling studies by Peter Wyle and Clause Rooth in the 1960.s indicated that small perturbations in the fresh water balance in the high North Atlantic could modulate the production of North Atlantic Deep Water and possibly effect global climate. The pioneering carbon isotope studies on bent... | <urn:uuid:ec61299e-54e3-4763-b2c5-7f761eea60cb> | 3.234375 | 2,117 | Academic Writing | Science & Tech. | 67.31798 |
The American pickerels are two subspecies of Esox americanus, a species of freshwater fish in the pike family (family Esocidae) of order Esociformes: the Redfin pickerel, E. americanus americanus, and the Grass pickerel, E. americanus vermiculatus.
Both subspecies are native to North America. The Redfin pickerel’s rang... | <urn:uuid:6f1fcb8a-4e97-4fcf-84c2-e9de336a2cd6> | 2.859375 | 528 | Knowledge Article | Science & Tech. | 36.993798 |
Feb. 17, 2013 In our ongoing quest for alternative energy sources, researchers are looking more to plants that grow in the wild for use in biofuels, plants such as switchgrass.
However, attempts to "domesticate" wild-growing plants have a downside, as it could make the plants more susceptible to any number of plant vir... | <urn:uuid:56b10d65-6ed7-498d-88c8-bdf366932ecc> | 3.546875 | 587 | Truncated | Science & Tech. | 40.28552 |
Observations and results
Did the larger boat hull support a greater amount of weight? Did both hulls have a similar density right before sinking, which was roughly one gram per cubic centimeter—the density of water?
When you first put one of the boat hulls on the water, it should float because its total density is less... | <urn:uuid:9945a605-2fa0-4167-bef5-8c6d9a15c6ac> | 3.53125 | 356 | Knowledge Article | Science & Tech. | 52.026234 |
A research team led by Australian engineers has created the first working "quantum bit" based on a single atom in silicon,
En-Lugal"-They made a hard-drive.[/quote]
See more evidence you don't understand the science.
A quantum bit, based on a single atom is going to be able to transfer more information at any one time ... | <urn:uuid:956d270c-bea8-4bf5-b8fb-4e7ec440864c> | 2.953125 | 1,261 | Comment Section | Science & Tech. | 72.770241 |
AGB (Asymptotic Giant Branch) stars generate a massive dust driven stellar wind at the end
of their lives. Ideally, this mass loss is spherical if the physical conditions are homogeneous
at the stellar surface (e.g. temperature) and the stellar vicinity (e.g. density). Indeed,
several physical processes induce deviatio... | <urn:uuid:92971455-c7d1-4488-8931-11418747cd78> | 2.8125 | 413 | Academic Writing | Science & Tech. | 34.501059 |
Know the Science Behind the Flying V
The temperature is dropping and the leaves are falling off the trees as nature is preparing itself for the change in seasons. Up from above you hear the honking and the familiar sight of the flying V. That's right, its migration time for many different species of ducks and geese (al... | <urn:uuid:5b889aa4-d4b9-4b13-a309-f82db616206e> | 3.171875 | 692 | Content Listing | Science & Tech. | 62.026221 |
Ars Technica: A team of researchers from Caltech and the University of Rochester, New York, has created the world’s most sensitive accelerometer. Accelerometers are most familiar in reference to smartphones, which use them to recognize when the device has been rotated. Accelerometers are also used to trigger airbags in... | <urn:uuid:f37e3b11-3a67-4898-bd37-5bbf302e18c6> | 3.328125 | 808 | Content Listing | Science & Tech. | 34.019512 |
How to prove the existence of graviton, boson?
What is the smallest particle found?
How come a particle has no charge, no mass and no existence?
Gravitons are still theoretical.
The smallest particle with non-zero rest mass is still the electron.
The neutrino is a particle with zero rest mass (maybe) and no charge:
it ... | <urn:uuid:471f018c-24ec-4975-9aa4-0fc224eeb032> | 2.890625 | 100 | Content Listing | Science & Tech. | 54.83 |
salt-wedge | fjord | slightly stratified | vertically mixed | freshwater
Fjords (pronounced fee-YORDS) are typically long, narrow valleys with steep sides that were created by advancing glaciers. As the glaciers receded they left deep channels carved into the earth with a shallow barrier, or narrow sill, near the ocean... | <urn:uuid:d5c1bb40-6d2d-432f-9f28-a4ea0226ac15> | 4.03125 | 227 | Knowledge Article | Science & Tech. | 42.655164 |
|+ Visit the NASA portal|
Lunar Research Station Design Challenge
By the Murphy Science Research 9 Classes
The Peary Crater is the closest large crater to the Lunar North Pole (88.6° N 33.0° E) that is around 73 km wide. From the Earth the crater appears on the northern lunar limb, and is seen from the side. The crater... | <urn:uuid:a03750c7-81dd-44e8-992e-d4def6c0513a> | 4.125 | 1,807 | Knowledge Article | Science & Tech. | 41.469813 |
IBM Unknown Compound
Date added: 02 Aug 2010
In a pioneering research project, for the first time, scientists at IBM and the University of Aberdeen have collaborated to "see" the structure of a marine compound from the deepest place on the Earth using an atomic force microscope (AFM). The results of the project open up... | <urn:uuid:9e1804a0-afe6-451a-aeab-72e686997bd9> | 3 | 137 | Truncated | Science & Tech. | 31.945652 |
Science Fair Project Encyclopedia
The wave equation is an important partial differential equation which generally describes all kinds of waves, such as sound waves, light waves and water waves. It arises in many different fields, such as acoustics, electromagnetics, and fluid dynamics. Variations of the wave equation a... | <urn:uuid:59fca4d2-a967-407a-a24b-3e9a88a962b2> | 3.953125 | 746 | Knowledge Article | Science & Tech. | 38.995891 |