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What on Earth is that?
The Richat Structure
in the Sahara Desert of Mauritania
is easily visible from space
because it is nearly 50 kilometers across.
Once thought to be an
impact crater, the
flat middle and lack of shock-altered rock indicates otherwise.
The possibility that the Richat Structure
was formed by a
also s... | <urn:uuid:708df54b-a4b5-4e55-bb8d-7481162ef449> | 3.6875 | 145 | Knowledge Article | Science & Tech. | 37.966865 |
One way to explain the existence of the Moon is through a giant collision, one that tore off enough material to build a satellite in a planetary orbit. Can Pluto and its moon Charon be explained the same way? Robin Canup thinks so. Canup is assistant director of Southwest Research Institute’s Department of Space Studie... | <urn:uuid:66828784-3408-4bf2-b9ac-cbd9c834bbad> | 3.765625 | 476 | Knowledge Article | Science & Tech. | 52.5625 |
Overview: This tutorial discusses
isotopes and isotopic abundance. Nuclear binding energy and mass defect are
presented and the technique of mass spectrometry is introduced.
The current system of atomic masses was instituted in 1961 and is based on
the mass of 12C (read carbon twelve). By definition the atomic mass
of ... | <urn:uuid:e4175bdb-1b80-4dcd-ac06-beddab1b79a4> | 3.984375 | 1,352 | Tutorial | Science & Tech. | 47.283843 |
How to Traverse Data with Apply Functions in R
R has a powerful suite of functions that allows you to apply a function repeatedly over the elements of a list. The interesting and crucial thing about this is that it happens without an explicit loop.
Because this is such a useful concept, you’ll come across quite a few d... | <urn:uuid:75c40c52-dcf6-4b31-95a3-4f4b4b5c51a3> | 3.5625 | 264 | Tutorial | Software Dev. | 45.848903 |
To begin thinking about what equation we would need to construct to show the number of potentially detectable alien civilizations we must first begin by considering the factors that will affect this number.
Before I begin explaining how we go about constructing the equation I want to first say that this equation is a s... | <urn:uuid:7ce02639-4a27-48ec-8640-d94e95df3e2d> | 2.734375 | 1,443 | Personal Blog | Science & Tech. | 51.443558 |
SQL (Structured Query Language)
SQL is the language used to work with relational databases. SQL statements are referred to as queries and typically they have the capability to INSERT, UPDATE, and DELETE database records as well as create tables, alter tables and others.
- User types their zip code into a web form and c... | <urn:uuid:eabb977d-849c-4685-bb97-8d7b4406a903> | 3.171875 | 293 | Knowledge Article | Software Dev. | 64.339568 |
Physics Homework Help
|PHYSICS AROUND THE WORLD-The world's most comprehensive
index to on-line physics resources!
WHAT ARE ATOMS?-the building blocks of matter.
ATOM BUILDER - You try it! Lets users build a carbon atom particle by particle.
|PHYSICS LAWS-Laws, rules, principles, effects, paradoxes, limits, constants, ... | <urn:uuid:ca4531ff-b7f3-49d0-ba0e-97d037013dcd> | 3.15625 | 1,045 | Content Listing | Science & Tech. | 31.988717 |
Lightning is an atmospheric electrostatic spark accompanied by thunder, which typically occurs during thunderstorms. A leader of a bolt of lightning can travel at speeds of 220,000 km/h (140,000 mph). Lightning is extremely hot. A flash can heat the air around it to temperatures about 30,000 °C (54,000 °F). it is dange... | <urn:uuid:032f4302-bedb-4453-b2d6-f1ad09324f0d> | 3.484375 | 88 | Knowledge Article | Science & Tech. | 78.384608 |
Moderate Geomagnetic Storm at Earth
Geomagnetic storms at Earth are currently at a rating of G2 (moderate) on a scale of G1 to G5. This is due to the arrival of a coronal mass ejection that began at 1 p.m. EST on March 10, 2012, in association with the two M-class flares that day. Storms at this rating may have an effe... | <urn:uuid:5fef97fd-e4dd-463c-bc9d-ef0b4ccc9f69> | 2.921875 | 609 | Knowledge Article | Science & Tech. | 68.244274 |
had been warning New York City for a decade that a hurricane like Sandy barreling in from the east could flood downtown Manhattan and coastal New Jersey. Most recently, he and other scientists published a big 2011 report detailing the threat and recommending ways of protecting the region against storm surges. Jacob fel... | <urn:uuid:7d6ac68b-9ae2-4adb-b8bd-50ab47787521> | 3.15625 | 712 | Audio Transcript | Science & Tech. | 59.579872 |
To understand how a pH amplifier works, we must learn a bit about what the pH electrode(Probe) does. In the most basic sense a pH probe is a very simple single cell battery, where the voltage produced is proportional to the hydrogen ion concentration around the probe and therefore proportional to the Log of the hydroge... | <urn:uuid:7be5d56e-1a57-4cc3-9ddc-4dcdd80822c7> | 3.796875 | 177 | Knowledge Article | Science & Tech. | 51.803844 |
The figure opposite represents a device called " pendulum conique". It is about a simple Pendule but which one attaches the end of the wire to a vertical axis of rotation (rigid stem driven by an engine).
If one makes start the engine slowly and that one increases the number of revolutions gradually, one observes that ... | <urn:uuid:aaa5b20b-c56e-4383-a1da-683de5fe78d5> | 3.90625 | 397 | Knowledge Article | Science & Tech. | 34.725197 |
In this video adapted from NASA, learn how lasers can be used to map the surfaces of planets. Animations illustrate how LIDAR—light detection and ranging—uses reflected laser pulses to measure the distance between the instrument onboard a satellite and the surface of the planet. Find out how scientists compile distance... | <urn:uuid:ee4a3c6d-e58e-4a7c-a6e6-bbfac973831d> | 4.1875 | 817 | Knowledge Article | Science & Tech. | 30.798335 |
The Mars Polar Lander during tests.
Click on image for full size
Courtesy of NASA
Mars Lander may be Alive
News story originally written on January 27, 2000
Just when everyone had given up hope, a faint signal was received at Stanford University. Scientists say it most likely came from Mars, although they won't know fo... | <urn:uuid:7a886cb5-4d5d-4fde-8dd5-2f9c8a91724d> | 3.28125 | 633 | Content Listing | Science & Tech. | 56.909114 |
We have written about the solar control on climate many times in the past, and to say the least, the debate continues to rage regarding the solar influence of Earth’s climate. IPCC has been luke warm on the subject, stating in the Technical Summary that “Solar irradiance contributions to global average radiative forcin... | <urn:uuid:3817f150-196e-484f-800c-cc95f816a6a1> | 2.78125 | 1,085 | Personal Blog | Science & Tech. | 41.455604 |
(reprinted from icecap.us)
In a Geological Society of America abstract, Dr. Don Easterbrook, Professor of Geology at Western Washington University, presents data showing that the global warming cycle from 1977 to 1998 is now over and we have entered into a new global cooling period that should last for the next three d... | <urn:uuid:d74b61e3-f3a5-457d-a231-e3b4e42eee01> | 3.25 | 566 | Knowledge Article | Science & Tech. | 44.690278 |
Here are two facts you need to know about retinal ganglion cells to
make sense of Meister's experiment:
1) They have a receptive field which extends over a spatial region.
2) Most of them respond to stimulus with a large transient signal
followed by a smaller sustained signal.
The first thing Meister et. al. did in the... | <urn:uuid:595452c7-7f9f-4460-99f2-4307f37a2ad9> | 3.75 | 1,787 | Comment Section | Science & Tech. | 42.852368 |
Bleach has two main functions: sanitizing HTML based on a whitelist of tags and attributes, and turning URLs into links. It uses html5lib for both.
For more information on using Bleach, see the README included in the source. For more info on how Bleach works, follow below the jump.
clean() function uses a slightly cust... | <urn:uuid:3d6abec2-cdbb-4965-b80d-090476068b91> | 2.703125 | 610 | Documentation | Software Dev. | 54.960106 |
General Summary of Dynamic SQL Processing
The following statements are used when SQL statements are dynamically submitted:
Allocate extended cursor. Allocate SQL descriptor area. Close an open cursor. Deallocate SQL descriptor area. Deallocate prepared SQL statement. Declare a cursor for a statement which will be dynam... | <urn:uuid:ba9606a6-a6d1-4c25-99da-98ab02b0cfa5> | 3.046875 | 299 | Documentation | Software Dev. | 33.304899 |
Ma-on formed over the western Pacific Ocean in early July, traveled west then north, and made a U-turn along the shore of Japan. En route to Japan, the storm strengthened into a Category 4 typhoon, and dropped heavy precipitation.
This color-coded image shows rainfall amounts from July 14 to 21, 2011. The lightest rain... | <urn:uuid:51ac9189-6445-4854-83c0-4187d7458144> | 3.078125 | 429 | Knowledge Article | Science & Tech. | 53.463932 |
Distance: 5500 to 9000 light years
Image and Text by Robert Gendler
A gem of the summer sky, M20 allows us a view into the exciting science of star birth.
M20 is a young HII region (300,000 years old) about 30 light years across and is illuminated by the O-type supergiant HD 164492 at the center of its trilobed emissio... | <urn:uuid:0ada294c-ccda-45bf-b0c1-a62cfcd400c2> | 3.46875 | 247 | Knowledge Article | Science & Tech. | 62.648901 |
How do you solve this expression for T? 2=e^(.003t)
The answer is t=ln2/.003
In general, to "solve" an equation for t, you do, to both sides, the "opposite" of what is done to t, in the reverse order. Here, . To evaluate that, you would do two things: first multiply t by 0.003, then take the exponential. We need to do ... | <urn:uuid:bb9186b7-8d5d-4702-8099-c6ccad1bb02b> | 2.984375 | 191 | Q&A Forum | Science & Tech. | 82.584523 |
Galaxy interactions can be the most efficient way to produce strong torques, and transfer the angular momentum away. During the interaction period, strong bars are triggered in the galaxy disks, and through the same mechanisms as described before, gas is driven inwards. During the merger, a complete change of geometry ... | <urn:uuid:d4dddb1c-3334-4617-af1c-9b4fcd4256b9> | 3.34375 | 264 | Academic Writing | Science & Tech. | 50.212692 |
What are we saving? Developing a standardised approach for conservation action
Sitas, N.; Baillie, J.; Isaac, N.J.B.. 2009 What are we saving? Developing a standardised approach for conservation action. Animal Conservation, 12 (3). 231-237. 10.1111/j.1469-1795.2009.00244.xFull text not available from this repository.
A... | <urn:uuid:e68bb203-5b24-468a-8b4c-64897c62b58b> | 3.0625 | 352 | Academic Writing | Science & Tech. | 31.470563 |
Bruce Mate didn’t wait long. Within days of the April 20 Deepwater Horizon oil well blowout in the Gulf of Mexico, he was on the phone with officials from the U.S. Minerals Management Service. From 2001-2004, the agency had funded him to study the Gulf’s endangered sperm whales. Now, the director of Oregon State Univer... | <urn:uuid:ce0d7ee9-c87e-4fab-adc5-080cef71892b> | 3.046875 | 1,306 | Knowledge Article | Science & Tech. | 44.567238 |
The Creation Wiki is now operating on a new and improved server.
Complex specified information
From CreationWiki, the encyclopedia of creation science
Simply put, complex specified information is information that is both complex and specified, such that it is highly improbable and specific. The complexity of the inform... | <urn:uuid:ea4fd3c9-2758-40ef-a20a-0425ff296bd7> | 3.234375 | 1,012 | Knowledge Article | Science & Tech. | 64.945369 |
O'Reilly Book Excerpts: Java Programming with Oracle SQLJ
Contexts and Multithreading
This excerpt is Chapter 8 from Java Programming with Oracle SQLJ, published in August 2001 by O'Reilly.
There are two important objects used in SQLJ that affect the execution of database operations: connection contexts and execution c... | <urn:uuid:362e0e5d-dcd1-4562-97d6-3231ff3d21b1> | 3.296875 | 228 | Truncated | Software Dev. | 35.715263 |
Cooking with Python
by Robin Parma, Alex Martelli, Scott David Daniels, Ben Wolfson, Nick Perkins, Anurag Uniya, Tim Keating, Rael Dornfest and Jeremy Hylton, authors of the Python Cookbook
1. Simple Tests Using Exceptions
Usually Python is straightforward, but there are a few unexpected exceptions.
Credits: Robin Parm... | <urn:uuid:089cbda8-efc5-4f95-9e06-da857b057655> | 3.34375 | 726 | Tutorial | Software Dev. | 60.586317 |
Four Portland Community College students are joining the international effort to explore Mars as a potentially safe, habitable place.
The students were chosen as National Community College Aerospace Scholars, a NASA educational program. From May 1-3, they will join dozens of other students across the country at the Jet... | <urn:uuid:b626c623-2b33-4673-9bc8-c32efe5c32e6> | 2.9375 | 748 | Audio Transcript | Science & Tech. | 55.453083 |
Search our database of handpicked sites
Looking for a great physics site? We've tracked down the very best and checked them for accuracy. Just fill out the fields below and we'll do the rest.
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We found 14 results on physics.org and 40 results in our database of sites
34 are Websites,
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and 6... | <urn:uuid:114a622b-5c36-4b04-99dc-4d4061bb56b9> | 3.15625 | 351 | Content Listing | Science & Tech. | 49.169684 |
Genetics is the study of genes, heredity and variation in living organisms. It involves research into the molecular structure and function of genes, particularly gene behavior in the context of a cell or organism. It also involves the study of patterns of inheritance and gene distribution, variation and change within p... | <urn:uuid:df4cbb1b-5783-4862-ac0c-14c51b80457c> | 2.6875 | 823 | Content Listing | Science & Tech. | 63.582306 |
A rare encounter between two gas-rich galaxies spotted by ESA’s (European Space Agency) Herschel space observatory indicates a solution to an outstanding problem: how did massive, passive galaxies form in the early Universe?
ESA (European Space Agency) astronaut Luca Parmitano left for Baikonur, Kazakhstan today, his l... | <urn:uuid:2df38fa6-f1bf-4c83-95e4-9ec465327007> | 3.15625 | 709 | Content Listing | Science & Tech. | 29.938901 |
NASA captures giant comet hitting sun
NASA has caught an astonishing image of a comet smashing into the sun, followed by an immediate coronal mass ejection that goes streaming out as if instigated by the comet, in a cause-effect relationship. Is this additional evidence of the Electric Universe model?
by Sterling D. Al... | <urn:uuid:5074f908-6a16-40de-990d-88009cfa0516> | 2.75 | 635 | Comment Section | Science & Tech. | 46.521899 |
Maria Winkelmann Kirch
Maria Winkelmann Kirch was a German astronomer who lived between 1670-1720. She
discovered the comet of 1702. She also published a paper in 1712 on the
conjunction of Jupiter and Saturn.
Maria worked with her husband, Gottfried Kirch in making calendars and
ephemerides (tables showing positions o... | <urn:uuid:2077ff93-613a-40e3-8615-4425b3ee00bf> | 3.3125 | 498 | Content Listing | Science & Tech. | 55.861417 |
Darwin convinced us that all life on Earth is related by common descent. It was a stunning overturning of the convention wisdom of simultaneous creation.
The task then was to discern the familial relationships of all species of life on Earth, including the many extinct organisms known through the fossil record. Biologi... | <urn:uuid:f61629d6-6045-41ef-8cfb-c08c1197542a> | 3.125 | 380 | Personal Blog | Science & Tech. | 48.408401 |
Arrays are a very simple data structure. Arrays use a single variable name to store multiple values. The different values are usually referenced by a number, often called index. This is a very convenient thing to do, as it keeps us from creating variables such as a1, a2, a3, a4 and so on. The benefit is especially noti... | <urn:uuid:6837053e-4994-4b40-9700-0b1cb4dbd721> | 4.0625 | 327 | Knowledge Article | Software Dev. | 46.839182 |
The first example of laser cooling, and also still the most common method (so much so that it is still often referred to simply as 'laser cooling') is Doppler cooling. Other methods of laser cooling include:
- Sisyphus cooling
- Resolved sideband cooling
- Velocity selective coherent population trapping (VSCPT)
- Anti-... | <urn:uuid:5643b9ad-7255-48f6-a9b7-b342eaa98891> | 3.703125 | 1,599 | Knowledge Article | Science & Tech. | 60.782079 |
A quasiprobability distribution is a mathematical object similar to a probability distribution but which relaxes some of Kolmogorov's axioms of probability theory. Although quasiprobabilities share many of the same general features of ordinary probabilities such as the ability to take expectation values with respect to... | <urn:uuid:80fcba9b-ea4e-41d6-b953-141adc5fe7fe> | 2.953125 | 2,047 | Knowledge Article | Science & Tech. | 31.912842 |
|This article does not cite any references or sources. (June 2009)|
Near space is the region of Earth's atmosphere that lies between 65,000 and 325,000–350,000 feet (20 to 100 km) above sea level, encompassing the stratosphere, mesosphere, and the lower thermosphere. This is above where airliners fly but below orbiting... | <urn:uuid:bb0475b9-2eeb-4b97-b662-ba7cf888bbe6> | 3.28125 | 405 | Knowledge Article | Science & Tech. | 43.235661 |
Forest Fertilization May be Beneficial
Professors and researchers are studying how fertilization of forests can increase productivity and carbon sequestration as part of the Pine Integrated Network Education, Mitigation and Adaptation Project (PineMap).
Fertilizing yards and crops are a common practice, and make one wo... | <urn:uuid:04a240a1-efa6-44a1-a62b-30724fd91a0a> | 3.5 | 469 | Truncated | Science & Tech. | 38.561453 |
Found 0 - 1 results of 1 programs matching keyword " path"
On August 1, 2008, a total solar eclipse occurred as the new moon moved directly between the sun and the earth. The moon's umbral shadow fell on parts of Canada, Greenland, the Arctic Ocean, Russia, Mongolia, and China. The Exploratorium's eclipse expedition te... | <urn:uuid:b6d74d1e-6055-437b-b279-3e645cd2ed56> | 2.921875 | 139 | Content Listing | Science & Tech. | 41.568295 |
On Fri, Nov 2, 2012 at 4:39 AM, Allen Rabinovich <allen...
> A beginner mpmath question here: how do I compute a min (or a max) of two
> mpf numbers? Is just the regular python min(a,b) the answer? Why does that
> work properly, given that mpf's are their own datatypes, and min relies on
> standard comparison operators... | <urn:uuid:f62b8a85-9b92-457b-b206-6ccd8cbcf7b4> | 3.140625 | 161 | Comment Section | Software Dev. | 73.720568 |
Probably the cutest satellite ever. (poster download available at World Space Week site.)
It’s Space Week! One of my favorite weeks!
What is World Space Week?
It is an international celebration of science and technology, and their contribution to the betterment of the human condition. The United Nations General Assembl... | <urn:uuid:f1d364fa-0bfa-4ae6-af18-2bd2a0bb19d3> | 3.234375 | 331 | Personal Blog | Science & Tech. | 36.872756 |
Black Holes Get In Early
Artist's conception of galaxy 4C60.07
The Submillimeter Array atop Mauna Kea consists of eight radio dishes observing as one. The dishes can be moved among 24 different locations to give resolution as great as a single 500 meter dish. It was built as a partnership between the Harvard-Smithsonia... | <urn:uuid:02a5d56e-d0f1-4fe5-8269-5faefb06c108> | 3.984375 | 341 | Personal Blog | Science & Tech. | 47.158206 |
The Topological Field of Real Numbers
We’ve defined the topological space we call the real number line as the completion of the rational numbers as a uniform space. But we want to be able to do things like arithmetic on it. That is, we want to put the structure of a field on this set. And because we’ve also got the str... | <urn:uuid:99e89780-40ab-42b3-a621-32d04486c69e> | 3.21875 | 1,156 | Academic Writing | Science & Tech. | 53.87914 |
g++how to compile a file? say you have test.cc and test.hh now, to compile and link it:
> g++ -c test.cc > g++ -o test test.othen you can run the exutable "test" you got. GCC docs
- -o output file
- -c compile but not link
- -L, -I include and lib paths
- -l link a lib
- -g insert debugging info in your exutable
- -Wal... | <urn:uuid:e2039a6b-5d96-4df0-a1f2-04a61b5ee26b> | 3.21875 | 1,259 | Documentation | Software Dev. | 57.358227 |
In the following list of Scheme primitives, the argument name denotes the name of a troff request, macro, escape sequence etc. (without any initial period or escape character) and can be supplied in form of a Scheme string, a Scheme symbol, or a Scheme character:
(defrequest "ti" ...) (defrequest 'sp ...) (defescape #\... | <urn:uuid:3bc72565-3174-47b1-8024-9950b46ed68f> | 2.828125 | 1,374 | Documentation | Software Dev. | 46.919089 |
first radiation constant
Enter a value into either text box and select units using the drop-down boxes.
What is the First Radiation Constant?
The first radiation constant, c1, is used in the Planck's law. It has the SI units of watts square metres. It is given by the equation:
c1 = 2π.hc2
where h is the Planck constant... | <urn:uuid:63cbcb22-125c-41e6-8662-a9bccaa770b9> | 3.28125 | 152 | Knowledge Article | Science & Tech. | 91.246519 |
As Dr. Heidi Cullen reports, the suffocating heat comes on the heels of the government's release of the new climate "normals". Every 10 years, scientists from the National Oceanic and Atmospheric Administration calculate the 30-year averages for temperature and precipitation from thousands of U.S. locations.
National H... | <urn:uuid:37b30292-0ac5-48a8-9bb8-29438f03b362> | 3.25 | 280 | Truncated | Science & Tech. | 52.249858 |
On 23 September 1999 the Mars Climate Orbiter, a space probe launched on 11 December 1998 and designed to go into orbit around Mars, was lost after its rockets were fired correctly but steered the probe too close to Mars, causing it to overheat.
A subsequent investigation revealed that the engineering team that designe... | <urn:uuid:cd9fd78b-5223-46ac-b6d8-01e14a3a5fc8> | 3.671875 | 354 | Knowledge Article | Science & Tech. | 32.571413 |
hydrogen peroxide, chemical compound, H2O2, a colorless, syrupy liquid that is a strong oxidizing agent and, in water solution, a weak acid. It is miscible with cold water and is soluble in alcohol and ether. Although pure hydrogen peroxide is fairly stable, it decomposes into water and oxygen when heated above about 8... | <urn:uuid:a2d28631-dbd5-4470-8b74-a6b3263ceed1> | 3.828125 | 365 | Knowledge Article | Science & Tech. | 28.914001 |
Explains the nuts and bolts of HTML (HyperText Markup Language), the programming language used to create web pages, and provides an introduction to HTML5 and CSS.
A complete tutorial and reference for C and C++, from variables to functions and loops, including the C Standard Library and the C++ Standard Template Librar... | <urn:uuid:3949a571-b081-4835-a75c-96f55d5f5277> | 3 | 290 | Content Listing | Software Dev. | 40.216012 |
WRITE down everything you know about Pluto, the ninth planet in our solar system. Odds are, you won't get very far. Even if you are S. Alan Stern, one of the world's foremost experts on planetary science.
"I can tell you everything we know for sure about Pluto on about three 3-by-5 file cards," says Stern, who heads th... | <urn:uuid:ef686445-c827-4015-ac3d-f6d5daca7661> | 3.15625 | 217 | Truncated | Science & Tech. | 56.270404 |
priciples behind nucleic acid isolation - need this for additional lecture information (Aug/02/2005 )
I really need some information on the actual principles behind the following procedures to isolate nucleic acids: alkaline lysis , phenol chloroform extrcation , cesium chloride and silica dioxide.
What actually happen... | <urn:uuid:4903033b-d0f4-4ea0-b174-c420bbdb0750> | 3.40625 | 178 | Comment Section | Science & Tech. | 47.962257 |
Astonishing Science. Spectacular museum.
The first atomic clock, Caesium I, was designed by Louis Essen and built at the National Physical Laboratory in Teddington in 1955. Although it was not the first machine to use atoms for timekeeping, it was the first to keep time better than the best pendulum or quartz clocks.
I... | <urn:uuid:72201cc1-a69e-4e64-b288-c83b7112d45d> | 4.09375 | 758 | Knowledge Article | Science & Tech. | 45.268455 |
All the gory details .....
First two protons collide and form a deuterium nucleus (one proton + one neutron). This is not as simple as it sounds. Only one collision in ten trillion trillion actually produces deuterium. In fact, the average proton must wait some 10 billion years to be part of the proton-proton chain.
Du... | <urn:uuid:63b52246-6507-41e9-9ec9-660e5754ebea> | 3.75 | 278 | Knowledge Article | Science & Tech. | 58.213722 |
Item: Snow cornice development and failure monitoring
Title: Snow cornice development and failure monitoring
Proceedings: Proceedings of the 2006 International Snow Science Workshop, Telluride, Colorado
Authors: Robert A. Burrows and David M. McClung, Avalanche Research Group, Department of Geography, University of Bri... | <urn:uuid:9dd7c123-75a4-4dc4-bbd1-676cd1900881> | 3.203125 | 725 | Academic Writing | Science & Tech. | 20.584133 |
NASA Visualization Captures Record Year for Wildfires in the U.S.
The total affected area, which is depicted in a new NASA map, is already the third-largest since records were first kept in 1960, and will likely break previous records by year’s end. The most intense fires occurred in the western U.S., where several maj... | <urn:uuid:ae44b622-67fe-4484-826c-8d18f8a2743f> | 3.4375 | 201 | Truncated | Science & Tech. | 41.906364 |
Soon after forming, Hurricane Emilia strengthened over the eastern Pacific Ocean in early July 2012. At 2:00 p.m. Pacific Daylight Time on July 9, 2012, the U.S. National Hurricane Center (NHC) reported that Emilia was a strong Category 2 hurricane, with maximum sustained winds of 110 miles (175 kilometers) per hour. T... | <urn:uuid:3b48a981-8bc6-4b92-b6f5-0870811ff599> | 2.828125 | 294 | Knowledge Article | Science & Tech. | 50.520536 |
Effect of Atmospheric Variability and Aircraft Flight Parameters on the Refraction of Sonic Booms
Kästner, Martina and Heimann, Dietrich (2010) Effect of Atmospheric Variability and Aircraft Flight Parameters on the Refraction of Sonic Booms. Acta acustica united with Acustica, 96, pp. 425-436. DOI: 10.3813/AAA.918295.... | <urn:uuid:9a5a2740-f2a9-4b24-b404-607195a0920b> | 2.75 | 651 | Academic Writing | Science & Tech. | 39.367826 |
So the wave moves like. a wave, it moves up and down, up and down. But how do photons move? Do they follow the same path or do they just go straight forward without oscillating?
The question is a bit tricky. Actually, a photon is the electromagnetic wave. Photons are quanta of the field. You can imagine a photon as the... | <urn:uuid:1b3e1777-f197-47c3-8b32-eb7217716188> | 3.125 | 153 | Q&A Forum | Science & Tech. | 67.817429 |
Self Online Study - Mathematics - Probability - Bays Theorem
An Introduction to Bayes’ Theorem
Bayes’ Theorem is a theorem of probability theory originally stated by the Reverend Thomas Bayes. It can be seen as a way of understanding how the probability that a theory is true is affected by a new piece of evidence. It h... | <urn:uuid:b608a6f9-e3b7-40de-8544-ac7a8561d033> | 4.0625 | 791 | Truncated | Science & Tech. | 54.54697 |
A film Presented by John Massaria reveals Scientific Research explaining why they are spraying the sky’s around the world. The UN Environment Programme: 200 Species Extinct Every Day, Unlike Anything Since Dinosaurs Disappeared 65 Million Years Ago. According to the UN Environment Programme, the Earth is in the midst o... | <urn:uuid:921cd857-954c-4d32-b7c7-f29ea5e0123a> | 3.171875 | 167 | Truncated | Science & Tech. | 43.948656 |
You are looking at historical revision 8806 of this page. It may differ significantly from its current revision.
The following page is an introduction to Chicken intended to PHP programmers.
This is a work in progress, I will try to work on as frequently as possible (mostly on sunday). In the meantime, feel free to hel... | <urn:uuid:aa39b6a5-c37c-47cc-b3d3-4c7c7bee2819> | 2.953125 | 563 | Knowledge Article | Software Dev. | 56.532868 |
Article: Zircons Recast Earth's Earliest Era
For geologists, the first 500 million years of Earth's history is particularly mysterious. How did the planet evolve after it formed 4.5 billion years ago? Until recently, the impressions geologists had of this early period-the Hadean eon-evoked its name: hell on Earth. Scie... | <urn:uuid:82efb908-ab3b-426f-9725-6f27391602db> | 4 | 1,979 | Knowledge Article | Science & Tech. | 45.291162 |
sharp cosmic portrait features
and obscuring dust clouds in IC 1795,
a star forming region in the northern constellation
Also cataloged as NGC 896, the nebula's remarkable details,
shown in its dominant red color,
were captured using a sensitive camera,
and long exposures that include image data from a narrowband filte... | <urn:uuid:646cc079-5f12-44ca-b779-23f3ab25b772> | 3.046875 | 240 | Knowledge Article | Science & Tech. | 35.074045 |
It’s OK to FRET
We all experience fret now and then, that is, worried, distressed, vexed, or troubled feelings and emotions. Not good.
FRET, by contrast, is not so bad when it stands for fluorescence resonance energy transfer. This occurs when a dye molecule absorbs light of a particular color, transfers the energy to ... | <urn:uuid:95da5eea-e0de-4204-8e0d-67c9cb9f2c63> | 3.1875 | 302 | Personal Blog | Science & Tech. | 38.794676 |
How to Calculate Power Based on Force and Speed
In physics, you can calculate power based on force and speed. Because work equals force times distance, you can write the equation for power the following way, assuming that the force acts along the direction of travel:
where s is the distance traveled. However, the objec... | <urn:uuid:3ceb2efc-1c45-4df0-86f6-3e9a7b97262d> | 4.125 | 648 | Tutorial | Science & Tech. | 69.193389 |
All About Coral Reefs
Some fun facts about coral reefs!
Coral reefs are found in warm, shallow and clear waters of tropical oceans all around the world. They are extremely beautiful, diverse and productive. Today coral reefs are highly endangered mostly due to human activities.
- Coral reefs are massive limestone struc... | <urn:uuid:d91a1558-2b90-49d7-ac6f-f5ddf36fe97f> | 3.609375 | 155 | Knowledge Article | Science & Tech. | 43.567857 |
Protons in a magnetic field have a microscopic magnetization and act like tiny toy tops that wobble as they spin.The rate of the wobbling or precession is the resonance or Larmor frequency. In the magnetic field of an MRI scanner at room temperature, there is approximately the same number of proton nuclei aligned with ... | <urn:uuid:bff22a07-0ec8-49df-9792-0731b2cbfbbd> | 3.71875 | 341 | Knowledge Article | Science & Tech. | 40.382929 |
David Shiga, reporter
"Has NASA discovered extraterrestrial life?" asked blogger Jason Kottke on Tuesday, in a post that spread like wildfire around the web.
The speculation was prompted by a cryptic notice on NASA's website about "an astrobiology finding that will impact the search for evidence of extraterrestrial lif... | <urn:uuid:da4f3224-4859-4877-ac77-0469d5ee6d44> | 3.015625 | 335 | Personal Blog | Science & Tech. | 44.485802 |
Mechanics: Vectors and Projectiles
Vectors and Projectiles: Audio Guided Solution
During the Vector Addition lab, Mac and Tosh start at the classroom door and walk 40.0 m, north, 32.5 m east, 15.5 m south, 68.5 m west, and 2.5 m, north. Determine the magnitude and direction of the resultant displacement of Mac and Tosh... | <urn:uuid:d7bb6246-44b8-42e2-80cf-8e451981b4ea> | 3.53125 | 315 | Tutorial | Science & Tech. | 71.157529 |
From the edifice of the American judicial system through to the liberal coven of the open source community, it's a widely accepted fact that Microsoft's business is to write software that's tied to its' Windows operating system. Although Windows is often disparaged by unbelievers as being technically inferior, difficul... | <urn:uuid:f9b7e379-997a-4a82-97ee-8d21cb9d66b8> | 2.828125 | 357 | Knowledge Article | Software Dev. | 44.676144 |
View Full Version : Discussion: Melt Through the Ice to Find Life
2005-Jul-19, 06:23 PM
SUMMARY: Scientists can tell us what our climate on Earth was like in past by examining ice cores taken from glaciers. Tiny bubbles of air are trapped in the ice and maintain a historical record of ancient atmospheres. The effects o... | <urn:uuid:d44eee14-eaf6-4cd4-850f-14e3b3282f9d> | 3.046875 | 691 | Comment Section | Science & Tech. | 75.862022 |
Until now, it was a rarely pondered question: Between the virtual bookends of someone searching for revealing pictures of Lindsay Lohan online and a search engine producing said pictures, how much energy is consumed?
Thanks to an Internet mini-controversy this week, inquisitive minds now have a pretty good approximatio... | <urn:uuid:541a0d44-34d5-44f5-a5eb-ffd1478604ea> | 2.703125 | 702 | Personal Blog | Science & Tech. | 43.942669 |
ANTLR (ANother Tool for Language Recognition) is a language tool that provides a framework for constructing recognizers, compilers, and translators from grammatical descriptions containing C++, Java, or Sather actions. It is similar to the popular compiler generator YACC, however ANTLR is much more powerful and easy to... | <urn:uuid:5b30fd85-9b4a-4eb3-885f-04a1051409d7> | 2.859375 | 491 | Content Listing | Software Dev. | 21.530245 |
You've probably never given much thought to the ice cube swirling amid the contents of your Cuba Libre. When watching Titanic, you probably don't ponder how the iceberg that did the ship in is actually a great example of why we have life on earth. We all know that water is kind of important. While not the most exciting... | <urn:uuid:1cbb678b-bce0-474a-bc78-548d97bf2535> | 3.296875 | 623 | Personal Blog | Science & Tech. | 61.538421 |
Manual Section... (3) - page: fflush
NAMEfflush - flush a stream
DESCRIPTIONFor output streams, fflush() forces a write of all user-space buffered data for the given output or update stream via the stream's underlying write function. For input streams, fflush() discards any buffered data that has been fetched from the ... | <urn:uuid:09645ffa-fd23-45a3-a748-97e2a8fc78df> | 3.1875 | 395 | Documentation | Software Dev. | 71.049098 |
"Virtualization" is the act of making a set of processes believe that it
has a dedicated system to itself. There are a number of approaches being
taken to the virtualization problem, with Xen, VMWare, and User-mode Linux
being some of the better-known options. Those are relatively heavy-weight
solutions, however, with ... | <urn:uuid:ef63fac0-0e2e-4edb-8a2b-617378571981> | 2.71875 | 904 | Comment Section | Software Dev. | 31.124784 |
Science Fair Project Encyclopedia
- For Acoustic uses in spectrographs of sound waves, see below.
A spectrometer is an optical instrument for measuring properties of light over some portion of the electromagnetic spectrum. The measured variable is often the light intensity but could also be the polarization state, for ... | <urn:uuid:63e1ad7c-32ab-4b97-8201-9cfea6754ca8> | 3.734375 | 843 | Knowledge Article | Science & Tech. | 24.237714 |
This tutorial explains in full detail the nature and usage of links in HTML. It will not only show the basic syntax of links, but will also go through various characteristics that are usually not used and can provide a lot of hidden information for different interpreters (e.g., search engines).
Table of contentsBypass ... | <urn:uuid:99b14616-632a-4d06-ace2-a697de637b03> | 4.25 | 742 | Tutorial | Software Dev. | 57.15658 |
5 Everyday Items Invented By Nasa
Think about what you'd really like to do on your vacation and create a list to narrow your choices - whether it's hitting the beach, going shopping, climbing a mountain or visiting a museum. Consider whether you can do this somewhere nearby, or whether you know anyone who has done your... | <urn:uuid:be03be05-b0ed-4a39-ac63-3da79f968292> | 2.96875 | 552 | Listicle | Science & Tech. | 36.509404 |
Climate influences the environment, natural resources, the economy, and other aspects of life in all parts of the world. Natural and human contributions to changes in climate may have substantial environmental, economic, and societal consequences. Decision-makers, resource managers, and other interested individuals nee... | <urn:uuid:e5dc972e-ecf9-484b-ab87-ee3c7fff382b> | 3.96875 | 261 | Knowledge Article | Science & Tech. | 23.862857 |
Three specialists tell Zuhaila Sedek how geology can be employed to solve environmental issues
FOR centuries, geology has enlightened us about the Earth we live on. But this study of the Earth can also be a powerful “detective” tool, offering clues on how we can help solve environmental problems.
We talk to two geologi... | <urn:uuid:3f553613-d898-4e09-9076-c84a09e6ca18> | 3.21875 | 1,105 | Truncated | Science & Tech. | 47.420225 |
Sooner or later, it's bound to happen.
Sooner or later, scientists who study Earth-crossing asteroids say, astronomers will find one that has a significant chance of striking the planet.
Unlike several recently discovered asteroids that were first given very long odds for a collision, this time more precise orbital cal... | <urn:uuid:4f0f1968-7109-435d-9401-ebaf7616359e> | 3.453125 | 718 | Truncated | Science & Tech. | 48.767028 |
The Search for Strange Matter; January 1994; Scientific American Magazine; by Crawford, Greiner; 6 Page(s)
For some years, physicists have enjoyed toying with a particularly intriguing puzzle. Protons and neutrons readily form either tiny clumps of matter (the various atomic nuclei) or very large clumps of matter (neut... | <urn:uuid:1d18ed09-e602-4135-95cd-f1adf0f7c29c> | 3.484375 | 296 | Truncated | Science & Tech. | 35.990927 |
Title: Middle Rio Grande Basin Research Report 2008
Author: Finch, Deborah M.; Dold, Catherine, eds.
Source: Albuquerque, NM: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Middle Rio Grande Ecosystem Management Research Unit. 20 p.
Description: An ecosystem is rarely static. A natural... | <urn:uuid:f8598ded-d846-487e-8b48-70aa20fc348e> | 3.046875 | 331 | Truncated | Science & Tech. | 39.623261 |
Hydroids are actually colonies of individuals called polyps, which grow on a common stalk. Polyps in a typical colony each have specific jobs and look different from each other. These jobs include defense, feeding, and reproduction. In order to build up their own colony the hydroids reproduce by budding; all polyp type... | <urn:uuid:b4b81842-58c9-41e1-b813-a65f7b4c0ef4> | 3.84375 | 879 | Personal Blog | Science & Tech. | 42.400707 |
Only a week or so ago I was lamenting that few Americans were aware of the threat of avian flu. Now suddenly, the story is everywhere. No need to rehash here the potential catastrophe that has in recent days been splashed all over the media.
But here is another story, and an important one: Biologists have recreated the... | <urn:uuid:589952fd-2c7c-4b5d-a233-9079fa71284b> | 2.703125 | 366 | Personal Blog | Science & Tech. | 45.432007 |
Snakes have been around for nearly 100 million years and scientists have found many fossils of extinct species. But this astonishing specimen is different. This serpent is Sanajeh indicus. It is sitting in a dinosaur nest and its coils surround three eggs and the body of a hatchling.
There are many reasons to think tha... | <urn:uuid:e772a6b1-7f26-4ed5-a1fa-501764caeb1f> | 3.5625 | 1,034 | Personal Blog | Science & Tech. | 47.985587 |
Soon enough seahorses may start to become a much more popular thing in our aquariums again thanks to The Penghu Marine Biology Research Center of Taiwan.
Their research and process has allowed them to breed “tens of thousands” of seahorses in one single batch. The potential this offers the marine ornamental industry is... | <urn:uuid:96c515c8-cda8-4536-a32c-237a2807af29> | 2.84375 | 107 | Truncated | Science & Tech. | 37.962721 |
During the 20th century the search for a theory of how the physical world works at its most fundamental level went from one success to another. The earliest years of the century saw revolutionary new ideas including Einstein's special relativity and the beginnings of quantum theory, while the decades that followed each... | <urn:uuid:bc8f605b-4ed9-4af5-bade-077577383c51> | 2.875 | 709 | Nonfiction Writing | Science & Tech. | 35.476702 |
Matter: Gases, Liquids, and Solids
These sites explain and define the three stages (or phases) of matter: gas, liquid, and solid. There is also information about a fourth phase called plasmas. Includes animations of particles, videos, illustrations, and activity ideas. There are link to eThemes resources on the propert... | <urn:uuid:30e6d541-adae-47a7-a1e6-e132f35ab38a> | 4.125 | 850 | Content Listing | Science & Tech. | 46.464372 |
After this efficient formation, most of the gas is not in favorable conditions for star formation. Indeed, larger potential wells have not formed yet, and the density threshold is not reached. It is therefore likely that the gas will slowly accumulate in bigger potentials to form galaxies, as sketched in fig. 3. In the... | <urn:uuid:d24ea747-7a19-46f4-996c-74a3fc6e4ce0> | 3.53125 | 298 | Academic Writing | Science & Tech. | 47.938576 |
Action/reaction pairs are describing momentum flow. Momentum is a vector, so it is more difficult to explain intuitively, so you should start with money, which is a scalar. Let me call a "payment" money that enters your posession. A payment can be negative, in which case you lose money, like when you buy a hat.
Newton'... | <urn:uuid:5edd2d2d-568b-436d-baa5-b48a409c7a06> | 3.171875 | 438 | Q&A Forum | Science & Tech. | 56.274397 |
More news from Spaceweather.com:
COMPLEX ERUPTION ON THE SUN: On August 1st, the entire Earth-facing side of the sun erupted in a tumult of activity. There was a C3-class solar flare, a solar tsunami, multiple filaments of magnetism lifting off the stellar surface, large-scale shaking of the solar corona, radio bursts,... | <urn:uuid:d61e68ea-cada-4196-874d-af64610a8fad> | 3.0625 | 206 | Comment Section | Science & Tech. | 37.584268 |
Plate tectonics: A deep time and planetary perspective
John Weber, Geology Department, Grand Valley State University
James Lawrence Powell, in his poignant and insightful popular science book, Mysteries of Terra Firma, lists and discusses the three big ideas (paradigms) in Earth science: time (age of the Earth), drift ... | <urn:uuid:79dde4e8-8453-482b-9493-3245d1910e09> | 3.484375 | 686 | Academic Writing | Science & Tech. | 40.651211 |
You are looking at historical revision 10560 of this page. It may differ significantly from its current revision.
The fpio library contains a routines for converting floating-point numbers between IEEE binary representation and decimal string representation. It is based on the gdtoa
There are two routines included with... | <urn:uuid:72126a9c-652b-4790-a82d-d3dd9f294cf4> | 2.859375 | 312 | Documentation | Software Dev. | 26.830174 |
Science Fair Project Encyclopedia
Lynn Margulis (born 1938) is a biologist and a professor at the University of Massachusetts Amherst. In 1967 she proposed a contentious new hypothesis which became her most important scientific contribution as the endosymbiotic theory of the origin of mitochondria as separate organisms... | <urn:uuid:cc5f6d04-d2df-457d-b782-16ef1d831cdd> | 2.875 | 877 | Knowledge Article | Science & Tech. | 39.139047 |
Life After Death in the Deep Sea
Following immolation by volcanic eruption, the community around a hydrothermal vent recovers spectacularly
The first examples of life forms not dependent on solar energy were discovered by scientists using towed cameras and the submersible Alvin in 1977 along hydrothermal vents of the G... | <urn:uuid:aa83cf6a-c183-46ec-8a16-d5a23e055a3f> | 3.296875 | 182 | Truncated | Science & Tech. | 20.428358 |