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
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An absolutely historic weather event took place on Tuesday, October 26, 2010. It occurred in the Midwest and especially in the State of Minnesota. An incredibly intense low pressure system tracked due north from southern into northern Minnesota. As it was moving north it kept intensifying so that by Tuesday afternoon i... | <urn:uuid:6bc604df-1e5a-46b0-b52b-8062f282f82c> | 3.03125 | 413 | Personal Blog | Science & Tech. | 59.661588 |
|Variegated Fritillary Butterfly - Euptoieta claudia|
Family: Nymphalidae (brushfoot butterflies) / Subfamily Heliconiinae
Live adult butterflies photographed at Alpharetta, GA and Corpus Christi, Texas USA.
Butterfly Main | Moths | Moth Index | Skippers | Butterfly Index | Insects & Spiders
The Variegated Fritillary i... | <urn:uuid:a211299a-b862-4393-806e-3db7a346f45f> | 3.125 | 553 | Knowledge Article | Science & Tech. | 32.510498 |
log(y) = b* log(x)
b represents the percentage change in y that is associated with a 1% change in x. But this transformation is not always a good idea.
I frequently see papers that examine the effect of temperature (or control for it because they care about some other factor) and use log(temperature) as an independent ... | <urn:uuid:321c06af-fb96-4a9a-b676-a1af0d15a543> | 3.3125 | 599 | Personal Blog | Science & Tech. | 69.683501 |
device_writewrites data_count bytes from the buffer data to device. The number of bytes actually written is returned in bytes_written.
If mode is
D_NOWAIT, the function returns without waiting for I/O completion. Otherwise mode should be 0. recnum is the record number to be written, its meaning is device specific.
The ... | <urn:uuid:c1b8e91e-4821-46c2-aa89-4aab1ec37ca3> | 2.796875 | 309 | Documentation | Software Dev. | 24.756538 |
The following HTML text is provided to enhance online
readability. Many aspects of typography translate only awkwardly to HTML.
Please use the page image
as the authoritative form to ensure accuracy.
Marshall Space Flight Center, Alabama, and the Arnold Engineering and Development Center (Siebold et al., 1993). These m... | <urn:uuid:c186d49c-ff53-416a-9be6-5bda995077ba> | 3.59375 | 577 | Knowledge Article | Science & Tech. | 30.581604 |
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|Sep25-06, 08:57 AM||#1|
(ceramics) random walk approach to gases, liquids, or solids...
For the random walk approach to gases, liquids, or solids, why isn't there a gradient? The atoms don't jump by themselves, right? They should have to feel forces to jump...
|Sep25-06, 10:27 AM||#2|
And there is a gradient - the tem... | <urn:uuid:3f0d90c5-a058-4390-877c-fcc37617743b> | 3.296875 | 396 | Comment Section | Science & Tech. | 57.698845 |
Population size, foaling, deaths, age structure, sex ratio, age-specific survival rates, and more over a 14 year time span. This information will help land and wildlife managers find the best maintenance and conservation strategies.
Program to keep common species common by identifying those species and plant communitie... | <urn:uuid:cfef51a4-35c5-4362-8f45-e5c8c7b1fa97> | 3.34375 | 226 | Content Listing | Science & Tech. | 22.45413 |
Main page for accessing links for information and data on the San Francisco Bay estuary and its watershed with links to highlights, water, biology, wetlands, hazards, digital maps, geologic mapping, winds, bathymetry and overview of the Bay.
Doppler radar imaging is used for tracking the migration and behavior of bird ... | <urn:uuid:8ffa3ba9-ee1f-4d5c-9cc6-780298a0b372> | 2.984375 | 285 | Content Listing | Science & Tech. | 28.099681 |
About Structured Query Language
- SQL was first implemented in IBM's System R in
the late 1970's.
- SQL is the de-facto standard query language
for creating and manipulating data in
- There are some differences, but much
of SQL is standard across MS Access,
Oracle, Sybase, MySQL, PostgreSQL.
- SQL is either specified b... | <urn:uuid:e718b8cc-638b-4e09-85ee-ec6b0dfdc3ff> | 3.765625 | 402 | Documentation | Software Dev. | 31.171449 |
Solid State #1 by Sanjay Sharma
(a) Amorphous solids (b) Crystalline solids
4. Solid angle
5. Interfacial angle
6. Zone and Zone-axis
(i) AB type structures
The AB2 or A2B type of ionic crystals contain the ions in the ratio 1:2 or 2 : 1 respectively. For Example : CaF2 populary called to have fluorite structure with o... | <urn:uuid:48b76e97-12de-44f4-b57c-216bfbaecbfd> | 3.46875 | 951 | Academic Writing | Science & Tech. | 47.287516 |
by Dave Hennen
CNN Senior Meteorologist
In 2004 a 9.1 magnitude quake occurred in a similar region to today’s large quake generating a tsunami that killed more than 200,000 people. Again last year a similar magnitude 9.0 quake also generated a killer tsunami killing over 15,000. Today’s quake was strong enough to gener... | <urn:uuid:d0cf3bc1-4425-4181-b208-2d0c93c531e6> | 3.71875 | 445 | Personal Blog | Science & Tech. | 63.010086 |
This was derived from a graphical image; the image will be used
more directly in a subsequent version of this document.
From the top down:
- Your App Here (Python)
- A Python application makes a Tkinter call.
- Tkinter (Python Module)
- This call (say, for example, creating a button widget), is
implemented in the Tkint... | <urn:uuid:0a04e2e5-eb85-483e-9f3e-93a8f9d93dbf> | 3.5 | 328 | Documentation | Software Dev. | 68.337888 |
The CPython interpreter scans the command line and the environment for various settings.
CPython implementation detail: Other implementations’ command line schemes may differ. See Alternate Implementations for further resources.
When invoking Python, you may specify any of these options:
python [-bBdEhiOsSuvVWx?] [-c c... | <urn:uuid:80c2ab50-70f6-44de-91f8-8ba876abedb6> | 3.046875 | 2,025 | Documentation | Software Dev. | 47.754127 |
The Element Curium
[Click for Isotope Data]
Atomic Number: 96
Atomic Weight: 247
Melting Point: 1618 K (1345°C or 2453°F)
Boiling Point: ~3400 K (~3100°C or ~5600°F)
Density: 13.51 grams per cubic centimeter
Phase at Room Temperature: Solid
Element Classification: Metal
Period Number: 7 Group Number: none Group Name: A... | <urn:uuid:6d205fae-0cfe-4e0e-9a88-9a93c0c3f488> | 4.03125 | 568 | Knowledge Article | Science & Tech. | 47.526099 |
Most soil animals are very small. As a result, we don't know much about them. Simple questions like where they live haven't been completely answered. Part of the problem is that larval stages do not look like the adults. Maggots for instance, do not resemble flies. The Tullgren funnel is one method used to separate soi... | <urn:uuid:0a5df388-b975-40c4-8563-83273192a85a> | 4.09375 | 746 | Knowledge Article | Science & Tech. | 55.282975 |
Heavy oil is a common fuel for industrial furnaces, boilers, marines and diesel engines. Previous studies showed that the combustion of heavy oil involves not only the complete burning of volatile matters but also the bum-out of coke residues [1-3]. Detailed knowledge about heavy oil combustion therefore requires an un... | <urn:uuid:309cc348-e4b6-4bf1-91f9-3c696e402b89> | 3.015625 | 291 | Academic Writing | Science & Tech. | 48.260492 |
|Annu. Rev. Astron. Astrophys. 1989. 27:
Copyright © 1989 by . All rights reserved
Galaxies of the Local Group are all near enough that rather reliable methods can be used to diagnose what kinds of stellar populations each contains. There are still many uncertainties in detail, but experience has shown that the problem... | <urn:uuid:c810350a-4b4e-4af2-abf1-6d7038565f9b> | 2.9375 | 542 | Academic Writing | Science & Tech. | 44.174935 |
Hurricane Celia as observed by NASA's spaceborne Atmospheric Infrared Sounder (AIRS). This image shows Celia on July 23 in visible light, as you would perceive it from space. Located in the eastern north Pacific Ocean off the coast of Mexico, Celia's winds have now dissipated to highs of 40 mph. Celia was the first hur... | <urn:uuid:26204c01-9a1e-49d2-9a53-4e99f426ea18> | 3.578125 | 633 | Knowledge Article | Science & Tech. | 47.073364 |
Effect of Friction on Tides and Tidal Currents
In shallow water the tide and the tidal currents will be modified by the friction to which the waters are subjected when moving over the bottom. This bottom friction influences the currents to a considerable distance from the boundary surface, owing to the turbulent charac... | <urn:uuid:134ad326-911c-414c-a10b-8ce0d79928bf> | 4.03125 | 2,708 | Academic Writing | Science & Tech. | 47.634553 |
HTTP Handlers and Factories
ASP.NET provides a low-level request/response API that enables developers to use
.NET Framework classes to service incoming HTTP requests. Developers accomplish
this by authoring classes that support the System.Web.IHTTPHandler interface
and implement the ProcessRequest() method. Handlers ar... | <urn:uuid:a3e2cb97-e5e0-4987-a019-60e1fb08ac9b> | 2.78125 | 587 | Documentation | Software Dev. | 35.103575 |
The Magic BallScience brain teasers require understanding of the physical or biological world and the laws that govern it.
There was a magic show. A man put a solid metal ball under an opaque cover. After a while, he took the cover off of the ball and there was nothing left but some liquid.
AnswerIt was a ball of galli... | <urn:uuid:87d61ad4-9694-4224-90c8-1d655a35d914> | 2.8125 | 154 | Personal Blog | Science & Tech. | 72.800109 |
We can use what we know of geometric sequences to understand geometric series. A geometric series is a series or summation that sums the terms of a geometric sequence. There are methods and formulas we can use to find the value of a geometric series. It can be helpful for understanding geometric series to understand ar... | <urn:uuid:722949b3-bcbd-4f9b-9db8-63f6f474ce9f> | 3.765625 | 817 | Tutorial | Science & Tech. | 64.682616 |
These are commonly known as the narrow-winged damselflies, and there are 13 British species. Their adult body length ranges from 25 - 50 mm, and they contain the largest number of species in Northern Europe. The adults are usually red and black or blue and black.
On the left is Coenagrion pluella, the Azure damselfly o... | <urn:uuid:cb9d64ef-4d3a-48c2-bf9a-030a17fe72fc> | 3.625 | 557 | Knowledge Article | Science & Tech. | 60.658274 |
The spectroheliograph in use at the Yerkes Observatory brought proof of the distribution of elements such as calcium, at various densities, in layers of the Sun.s atmosphere. Hale named the billowing clouds of calcium and hydrogen vapor "flocculi."
Hale made his greatest discovery while working at the Mt. Wilson Observ... | <urn:uuid:4d5f071f-e715-45cf-93a4-6153b71f3d70> | 3.921875 | 188 | Knowledge Article | Science & Tech. | 31.020129 |
Can you reduce friction by decreasing the weight of the object on
top? For example, if you wanted to reduce the friction between the
tires of a car and the ground underneath it. Let's say on the first
test the cars total weight was 3500 lb, if we took out unnecessary
items would it reduce the friction between the tires... | <urn:uuid:178b06f6-2e72-436b-995f-2189f6c1eb3a> | 3.203125 | 191 | Q&A Forum | Science & Tech. | 61.75 |
Coriolus Effect at Equator
Although the Coriolus effect is zero on the equator, the
rotation of the Earth may still affect ballistics there. For
example, suppose that a shell is fired directly eastward along the
equator, in the absence of wind, and it hits a target ten miles
away. When the shell is fired it has an east... | <urn:uuid:4c06b862-e998-4ee4-9565-0f2be6c7fe67> | 3.875 | 809 | Knowledge Article | Science & Tech. | 54.861528 |
Behind this unassuming door, off a small side street in Cambridge Massachusetts, is the MIT Plasma Science and Fusion Center. There's little indication that inside scientists are using some of the most powerful magnetic fields in the world to manipulate the same stuff that the Sun is made of.
The first stop was the Alc... | <urn:uuid:ce000e6e-da52-4dc7-888e-1ef51a975a8b> | 3.65625 | 1,478 | Nonfiction Writing | Science & Tech. | 51.023317 |
It isn't possible for two signals that have different frequencies to have the same phase. They might be in phase for an instant, but because of the different frequencies, they cannot stay in phase.
However, you might divide them or mix them to a common frequency to produce square waves that are in phase, out of phase b... | <urn:uuid:879af711-d5b4-44e4-9762-7fa9a1afd971> | 3 | 167 | Q&A Forum | Science & Tech. | 47.755411 |
Organized areas of thunderstorm activity reinforce pre-existing frontal zones, and they can outrun cold fronts. This outrunning occurs in a pattern where the upper level jet splits into two streams. The resultant mesoscale convective system (MCS) forms at the point of the upper level split in the wind pattern in the ar... | <urn:uuid:1959237a-220e-4f95-8a23-1a4b36e1da73> | 3.84375 | 320 | Knowledge Article | Science & Tech. | 50.263769 |
Life as We Know It
Whale of a comeback, dancing cockatoos, sticky bees, and waltzing pond scum
- By Amanda Bensen, Joseph Caputo, T.A. Frail, Laura Helmuth and Abigail Tucker
- Smithsonian magazine, July 2009
Bumblebees search for flower petals that offer traction, University of Cambridge-led scientists have shown. Som... | <urn:uuid:5ffad20d-b7e8-4f41-ba1e-84c0c4f2e5df> | 2.890625 | 142 | Truncated | Science & Tech. | 49.27125 |
A pair of companies in Arizona are about to build a system to pull CO2 out of the atmosphere, attempting to prove that the "wind-scrubber" concept works. The scrubber will employ sodium hydroxide, which reacts with carbon dioxide, to remove CO2 from air drawn through the system. In principle, such systems could help to... | <urn:uuid:e264a766-a4b5-45d3-a320-ff119af477a4> | 3.203125 | 459 | Comment Section | Science & Tech. | 41.846565 |
Great Pacific Garbage Patch a bigger worry than tsunami debris Debris from the Japanese tsunami is starting to wash ashore on the U.S. West Coast in a big way. Beachcombers from Northern California to Alaska are finding fishing floats, soccer balls and ships that have drifted thousands of miles across... Digging into t... | <urn:uuid:07fc44c0-63d8-4ea5-ab66-3819b930b6bd> | 2.96875 | 529 | Personal Blog | Science & Tech. | 48.721764 |
Dramatic and unprecedented plumes of methane – a greenhouse gas 20 times more potent than carbon dioxide – have been seen bubbling to the surface of the Arctic Ocean by scientists undertaking an extensive survey of the region.
The scale and volume of the methane release has astonished the head of the Russian research t... | <urn:uuid:1b6bb254-6084-433f-ada6-20ed72a1661e> | 3.71875 | 377 | Comment Section | Science & Tech. | 31.335965 |
The track pattern — dot-dash-dash-dash, dot-dash-dash-dot, dot-dash-dot-dot (".--- .--. .-..") — spells out "JPL" in Morse code, which translates letters and numbers into a series of short ("dot") and long ("dash") signals.
Curiosity's signature wheel-print was a nod to NASA's lead center for unmanned planetary explora... | <urn:uuid:683cbc5e-dba8-467c-8a96-a755b4ef29b9> | 3.15625 | 414 | Truncated | Science & Tech. | 60.109011 |
As the Intergovernmental Panel on Climate Change (IPCC) puts the finishing touches to its final report of the year, two of its senior scientists look at what the panel is and how well it works. Here, a view from a leading researcher into temperature change.
The IPCC is a framework around which hundreds of scientists an... | <urn:uuid:cfdcb3d3-56bc-4fa9-991b-4763f194a076> | 3.140625 | 1,729 | Nonfiction Writing | Science & Tech. | 39.983988 |
Hugh Pickens writes "How has a 78-ton boulder traveled 130 meters inland from the sea since 1991? Live Science reports that geologists have puzzled for years over the mysterious boulders that litter the desolate coastline of Ireland's Aran Islands that somehow move on their own when no one is looking. The sizes of the ... | <urn:uuid:d511a727-c3b2-48ad-a27e-3b173bd30ee1> | 3.5 | 318 | Comment Section | Science & Tech. | 49.626038 |
There are a few different things at play here, but generally speaking: yes, a nucleus of ununoctium is larger than a nucleus of Sodium, and no, the electron orbitals of Ununoctium may not be larger than those in Sodium.
On a nuclear level, protons and neutrons do take up a finite amount of space. The size of the nucleu... | <urn:uuid:aa3198e5-28c7-4369-b867-16df28bf7462> | 3.4375 | 446 | Q&A Forum | Science & Tech. | 38.514875 |
Potassium-40 heats up Earth's core
May 7, 2003
Radioactive potassium could be a significant source of heat in the Earth's core. V Rama Murthy from the University of Minnesota and colleagues have shown that potassium-40 can exist in the core of the Earth and provide heat via its radioactive decay. The result could have ... | <urn:uuid:1199a65c-aa80-4dc4-9039-3ccc63991f5b> | 3.734375 | 475 | Truncated | Science & Tech. | 51.564577 |
Science subject and location tags
Articles, documents and multimedia from ABC Science
Friday, 24 May 2013
Sugar-free diets aren't just making headlines in the human world. Cockroaches have joined the anti-sugar trend.
Friday, 17 May 2013
Scientists have identified nanostructures in the ultra-black skin markings of an A... | <urn:uuid:e9861535-a425-4c97-a9e2-b212e0b53de1> | 2.703125 | 554 | Content Listing | Science & Tech. | 42.702909 |
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Sequencing by hybridization
Se... | <urn:uuid:d62f0d45-3ede-4a9c-81f8-56e920fb3a64> | 2.96875 | 282 | Knowledge Article | Science & Tech. | 29.811613 |
anomalous waterArticle Free Pass
anomalous water, also called Orthowater, or Polywater, liquid water generally formed by condensation of water vapour in tiny glass or fused-quartz capillaries and with properties very different from those well established for ordinary water; e.g., lower vapour pressure, lower freezing t... | <urn:uuid:c40f1b8d-0aae-4d17-b043-4485fa2af12e> | 2.90625 | 181 | Knowledge Article | Science & Tech. | 26.17 |
Java provides generic sort methods for arrays:
void sort( Object arr ) void sort( Object arr, Comparator cmp )
The first method uses the natural compareTo method, while the second allows a Comparator to be specified. The sort algorithm is a modified mergesort, stable and guaranteed O(n · log(n)).
Since the Collection... | <urn:uuid:102d381b-fbe6-430a-b9cd-175007b9a5e2> | 2.890625 | 147 | Documentation | Software Dev. | 38.947301 |
This is a part of the Howard T. Odum Collection
The work of Howard Odum generated an entire lexicon of terms that helped communicate his ideas to the world. Some terms, like energy and power, were drawn from existing disciplines but were used in new ways. Other terms such as emergy, energy hierarchy, net energy, and ma... | <urn:uuid:bcfd5be5-8f0c-46de-990e-60ade6969007> | 3.40625 | 291 | Structured Data | Science & Tech. | 37.646923 |
Sounding rockets are a sort of ballistic missile able to boost payloads of a few hundred kilograms to altitudes of 250-750 km, with almost vertical ascent and descent trajectories.
Originally conceived to sound the physical properties of the upper atmosphere, hence the name 'sounding' rockets, their use has been extend... | <urn:uuid:8d1d3921-2efd-420f-a4aa-634b36c25123> | 3.625 | 1,140 | Knowledge Article | Science & Tech. | 27.55945 |
Category: Science in Action
Subject(s): Life Science/Biology
Keywords: geothermal hotsprings, astrobiology, fundamental features of life, life beyond earth, biochemistry, extremophiles, extreme environments, microbes, bacteria, ecosystems, organisms, complexity of life, ocean life, microbial life in extreme environment... | <urn:uuid:f69658c1-0fd4-45bb-9dc0-ff676322cff9> | 2.875 | 278 | Content Listing | Science & Tech. | 48.442869 |
Using this graphic and referring to it is encouraged, and please use it in presentations, web pages, newspapers, blogs and reports.
For any form of publication, please include the link to this page and give the cartographer/designer credit (in this case UNEP/GRID-Arendal)
ADEME, Bilan Carbone® Entreprises et Collectivi... | <urn:uuid:91d1d413-b7bc-4c7b-a2a4-7c14e8318f45> | 2.734375 | 243 | Knowledge Article | Science & Tech. | 40.989849 |
Taken largely from the Talk.Origins Archive web site, and is used here with the kind permission of its author,
According to the theory of evolution, the "descent with modification" road to humans (or any other group, for that matter) is paved with a sequence of transitional fossils, spaced out in a time sequence reflec... | <urn:uuid:dd3e9be7-b953-4af6-8f16-82008d52b7d4> | 3.671875 | 3,424 | Academic Writing | Science & Tech. | 36.811451 |
A genetic takeover on a scale never seen before among vertebrates is taking place in the western US.
An alien fish is not only hybridising with the locals, but also breaking down the genetic barriers between once-distinct species. Such multi-way hybridisation could turn out to be much more common than we thought.
Dave ... | <urn:uuid:ae79537c-c4d3-4ce8-b7f6-58c915b64fa1> | 3.1875 | 1,462 | Comment Section | Science & Tech. | 53.977862 |
Justin Mullins describes how "Alice" can use quantum entanglement to send two bits of information to "Bob" using one photon (20 May, page 26). According to Mullins's description, Bob has to receive one photon from an entangled pair and then receive the other from Alice. So Bob still has to receive two photons in order ... | <urn:uuid:5811c3fa-9aad-49bc-bea5-5a734c713a28> | 3.546875 | 167 | Truncated | Science & Tech. | 51.517821 |
The name comes from their (H)igh iron abundance, with respect to other ordinary chondrites, which is about 25-31% by weight. Over half of this is present in a free state, making these meteorites strongly magnetic despite the stony chondritic appearance.
A probable parent body for this group is the S-type asteroid 6 Heb... | <urn:uuid:0c7daf87-d130-4451-acbe-9b614f38d78a> | 3.765625 | 322 | Knowledge Article | Science & Tech. | 38.733326 |
A worldwide database of over 13,800 integrated U–Pb and Hf-isotope analyses of zircon, derived largely from detrital sources, has been used to examine processes of crustal evolution on a global scale, and to test existing models for the growth of continental crust through time. In this study we introduce a new approach... | <urn:uuid:57cab0bb-b07f-423b-9535-d42536e8b165> | 2.71875 | 318 | Academic Writing | Science & Tech. | 48.601812 |
TeacherExpt:Sodium ethanoate ‘stalagmite’
From Learn Chemistry Wiki
In this demonstration experiment a supersaturated solution of sodium ethanoate crystallises rapidly forming a ‘stalagmite’.
This is a demonstration used to show the rapid crystallisation of a supersaturated solution in a spectacular way and explore the... | <urn:uuid:fab842cc-e98a-4541-90a4-948cde771e14> | 3.734375 | 564 | Tutorial | Science & Tech. | 35.8159 |
Naked eye astronomy
What is that - naked eye astronomy? Well... it's a very old science.
There were astronomers way before the telescopes.
People looked at the stars for thousands of years without any optical aid. And, with a lot of perseverance they got awesome results. They learned the apparent rotation of the stars,... | <urn:uuid:1d368987-7ace-4735-8184-e21885cb84aa> | 3.921875 | 919 | Tutorial | Science & Tech. | 58.22311 |
Want to stay on top of all the space news? Follow @universetoday on Twitter
The first space flight is a term that is debated. This is because “first spaceflight” can refer to three key events in the history of space exploration. The first would be the launch of the German rocket, V-2. This was the first rocket to succe... | <urn:uuid:0c0b9d21-93f7-479c-987d-0db1e6eab636> | 3.703125 | 648 | Personal Blog | Science & Tech. | 54.971037 |
Humankind’s experience visiting worlds beyond our own begins and ends with the dozen Apollo astronauts who skipped about on tiny swaths of the moon. But that doesn’t mean we can’t experiment with how and where we might visit (or live) on the extreme surfaces of other worlds. A few studies out recently are doing just th... | <urn:uuid:60246010-9099-4e3c-9a3e-7532282dc876> | 4.03125 | 1,073 | Content Listing | Science & Tech. | 48.463193 |
It’s been a Haskell programming rule of mine for a long time that explicit recursion is an admission of failure. First, linear recursions have already been captured in one of the Prelude (or Data.List) functions. Second, recursions or iterations over a data structure are almost always either fmap or one of the Data.Fol... | <urn:uuid:c693ab89-ae97-4415-bab8-b052a0218619> | 2.734375 | 774 | Personal Blog | Software Dev. | 58.358992 |
This Demonstration simulates the movement of "atoms" vibrating around a pulsating source. These might, for example, represent radial longitudinal oscillations of sound waves. The source oscillates sinusoidally at a chosen frequency and then movement of the seven circles of atoms follows the pulsation of the blue ball w... | <urn:uuid:1a5661ab-50be-4768-abd7-ef13f5ef0134> | 3.421875 | 216 | Documentation | Science & Tech. | 40.1765 |
These names refer neither to routines nor to locations with interesting contents; only their addresses are meaningful.
The address of _etext is the first location after the program text.
The address of _edata is the first location after the initialized data region.
The address of _end is the first location after the un... | <urn:uuid:dc8dd889-0397-444a-bdaf-a6e9f0390a3b> | 3 | 199 | Documentation | Software Dev. | 48.99 |
Eclipsing Binary Light Curves
An X-ray binary is a special binary system where
one of the stars is a
normal star but the other star is an odd star, an X-ray emitting neutron
star or white dwarf
or black hole.
By looking at the X-ray emission from
the system, which comes mostly from the X-ray star,
can learn the size of... | <urn:uuid:da0cd8f1-8d39-4098-91b1-c1377fbb8621> | 4.125 | 267 | Tutorial | Science & Tech. | 55.331471 |
What happens when you try and fit the triomino pieces into these
Can you cover the camel with these pieces?
How many different ways can you find to join three equilateral
triangles together? Can you convince us that you have found them
If you split the square into these two pieces, it is possible to fit the pieces toge... | <urn:uuid:ba9965ca-eb29-45f8-b129-4de2c5399318> | 2.703125 | 169 | Content Listing | Science & Tech. | 59.156775 |
Boltzmann's constant, also called the Boltzmann constant and symbolized k or k B , defines the relation between absolute temperature and the kinetic energy contained in each molecule of an ideal gas . This constant derives its name from the Austrian physicist Ludwig Boltzmann (1844-1906), and is equal to the ratio of t... | <urn:uuid:445f8e6c-4797-486d-8a57-e4513f2b6708> | 3.875 | 188 | Knowledge Article | Science & Tech. | 42.214071 |
The sample is mounted on a goniometer and gradually rotates while being bombarded with X-rays, producing a diffraction pattern of regularly spaced spots known as diffractions.
The diffracted beams add constructively in a few specific directions, determined by Bragg’s law:
- n. = 2.d.sin ø
Here d is the spacing between ... | <urn:uuid:d4c936e9-b8da-4e94-bc54-7a803476e727> | 3.953125 | 270 | Knowledge Article | Science & Tech. | 48.44352 |
|Figure 2. A closer look with at the alcoves and lineated valley fill seen in Fig 1. The locations of these THEMIS & higher resolution MOC images are marked in Fig. 1a.
d)The outflow of two ridged lobes from alcoves (bottom left and right) as they join a major lineated vally fill of area C (upper right) near the conver... | <urn:uuid:7fedd179-a64d-4fff-9f30-8fc96f562cd9> | 2.8125 | 344 | Truncated | Science & Tech. | 52.539127 |
The Schrodinger equation is a linear differential equation used in various fields of physics to describe the time evolution of quantum states. It is a fundamental aspect of quantum mechanics. The equation is named for its discoverer, Erwin Schrodinger.
General time-dependent form
The Schrodinger equation may generally ... | <urn:uuid:a15c6272-8d1b-42b8-907a-289a1027be66> | 3.8125 | 554 | Knowledge Article | Science & Tech. | 30.889858 |
Boundary value problems of analytic function theory
Problems of finding an analytic function in a certain domain from a given relation between the boundary values of its real and its imaginary part. This problem was first posed by B. Riemann in 1857 . D. Hilbert studied the boundary value problem formulated as follows... | <urn:uuid:77e46c13-c865-473d-9d2d-673e7a5a63ed> | 3.203125 | 2,821 | Knowledge Article | Science & Tech. | 56.333139 |
How to Create Coding Standards that Work
One of the things that we love most about Perl is its flexibility, itssimilarity to natural language, and the fact that There's More Than One Way To Do It. Of course, when I say ``we'' I mean Perl hackers; the implicit ``them'' in this case is management, people who prefer other... | <urn:uuid:5e55e92c-f76c-4336-b30c-2c63b6210791> | 2.8125 | 1,620 | Personal Blog | Software Dev. | 51.434841 |
A future is a place-holder for the undetermined result of a (concurrent) computation. Once the computation delivers a result, the associated future is eliminated by globally replacing it with the result value. That value may be a future on its own.
Whenever a future is requested by a concurrent computation, i.e. it tri... | <urn:uuid:13c91150-f3a7-4563-a4a7-6f91628d14e3> | 3.3125 | 1,693 | Documentation | Software Dev. | 48.113973 |
|The Open Door Web Site|
Calculations Involving the Doppler Effect
Velocity of sound relative to air = v
Frequency of emitted sound = f
Apparent frequency of received sound = f’.
Moving Source (stationary observer)
If the source moves with a velocity of magnitude vs (relative to the air) then the velocity of the waves ... | <urn:uuid:2be125e9-0a72-4fb6-9e08-370fd65bee1b> | 3.84375 | 128 | Tutorial | Science & Tech. | 33.482759 |
Occasionally, it may be useful to specify that a certain file or directory must, if necessary, be built or created before some other target is built, but that changes to that file or directory do not require that the target itself be rebuilt. Such a relationship is called an order-only dependency because it only affect... | <urn:uuid:119594d0-8e20-42bf-8836-532b6aa9e16c> | 2.75 | 817 | Documentation | Software Dev. | 70.34702 |
Posted: Sun Mar 02, 2008 8:18 pm Post subject: Reply with quote
Since air has weight it must also have density, which is the weight for a chosen volume, such as a cubic inch or cubic meter. If clouds are made up of particles, then they must have weight and density. The key to why clouds float is that the density of the... | <urn:uuid:e8b9a286-0198-426a-a841-eb6f6fc1cd58> | 3.640625 | 724 | Comment Section | Science & Tech. | 69.156771 |
Tornadoes and tornado deaths, sorted by Fujita
Click on image for full size
Courtesy of University of Chicago
Most of the world's tornadoes happen in the United States. These
tornadoes are around Tornado Alley
. There are
about 750 tornadoes each year in the U.S. An average of about 100 people
are killed each year by t... | <urn:uuid:01734548-d5fd-4e5e-bffa-27922750c049> | 3.203125 | 614 | Content Listing | Science & Tech. | 61.751982 |
ASK A SCIENTIST
Question: Why do animals see different than humans? Why can't humans see in the dark?
Have you ever wondered what your dog or cat sees when he or she watches television with you? Do they see what we see or is it something entirely different? Until very recently, we humans were totally and literally in t... | <urn:uuid:70ca282c-328a-473c-9682-7131bc6b20ae> | 3.859375 | 639 | Q&A Forum | Science & Tech. | 55.532464 |
What the Sputniks Said (Jul, 1958)
What the Sputniks Said
Russian scientists disclose how radio waves travel from their satellites to earth
By A. J. Steiger
Radio LISTENERS who tracked the earth-circling travels of Sputnik I have reported new discoveries in short-wave propagation, including a round-the-world echo, acco... | <urn:uuid:d585c044-ad7d-4610-a313-90816d2f5d6e> | 3.40625 | 1,651 | Truncated | Science & Tech. | 33.93275 |
What was the weather like millions of years ago?
What did dinosaurs eat for breakfast?
How did people on Easter Island build those statues?
Answer: Ask a rock.
Rocks are some of the most basic features of any landscape. They can be found in cities, deserts, forests, and they can be sculpted, rough, shiny or drab. Most ... | <urn:uuid:064115f4-1395-4b22-aebf-3bfdeda266ae> | 3 | 1,516 | Personal Blog | Science & Tech. | 57.966158 |
This week I received some wonderful pictures from Patrick McKinnon, showing rainbow-like cloud features over Seattle. Take a look at them!
And over the past year, others have sent me similar pics. What are they? They have lots of colors like rainbows, but they aren't rainbows. And besides there is no rain with them!
Wh... | <urn:uuid:4293149c-63a0-4fd4-a1c9-48d75fc870e2> | 3.109375 | 251 | Personal Blog | Science & Tech. | 46.6275 |
Comprehensive DescriptionRead full entry
BiologyA rare species (Ref. 26346) inhabiting continental slopes (Ref. 247). Usually mesopelagic although taken most often near the bottom (Ref. 10717). Its razor-edged lower teeth is used to attack and dismember large prey (Ref. 247). Ovoviviparous (Ref. 205). Utilized dried sa... | <urn:uuid:5db406be-1665-47af-bf12-bc0724f38e37> | 2.78125 | 94 | Knowledge Article | Science & Tech. | 48.318939 |
Diversity in Alabama
The word biodiversity is a descriptive term for the overall variety of living things in the world or a particular region. Well-known areas of high biodiversity include tropical rainforests and coral reefs, where the varieties of plants and animals can be astounding. An area with a large number of a... | <urn:uuid:6cc52f1d-4cbd-468e-9eb2-ff43122697ee> | 3.390625 | 2,150 | Knowledge Article | Science & Tech. | 33.326855 |
GREAT CIRCLE SAILING
The great circle distance in degrees between Point1 (lat1, lon1) and Point2 (lat2, lon2) is easily calculated:
cos(D)= Sin(lat1) * Sin(lat2) + cos(lat1) * cos(lat2) * cos(lon2 - lon1)
or what is the same:
D= arccos(Sin(lat1) * Sin(lat2) + cos(lat1) * cos(lat2) * cos(lon2 - lon1))
In this paper we a... | <urn:uuid:f178995e-c0d3-4655-b939-ba2daff8c94b> | 3.0625 | 433 | Documentation | Science & Tech. | 68.122771 |
3.2. Supernova Remnants: Plerions
The Crab Nebula is a somewhat unique object, and hence one could not confidently predict what other supernova remnants might be detectable. The Crab is a member of that subclass of supernova remnants known as plerions, in which a bubble of relativistic particles is powered by a central... | <urn:uuid:a5ca5417-132e-4bc3-ab7e-9177b3d20893> | 3.3125 | 558 | Knowledge Article | Science & Tech. | 78.771537 |
The current is maximum through those segments of a circuit that offer the least resistance. But how do electrons know beforehand that which path will resist their drift the least?
This is really the same as Adam's answer but phrased differently.
Suppose you have a single wire and you connect it to a battery. Electrons ... | <urn:uuid:2402d419-cd6b-4283-8ea8-f9862f9f0829> | 3.78125 | 455 | Q&A Forum | Science & Tech. | 54.203306 |
The similar mathematical forms of Coulomb’s Law of Electrostatics and Newton’s Law of Gravitation suggest that two oppositely charged spheres should be able to move in a binary orbit about their center of mass using only the electric force as the force of attraction. To test this idea, we will attempt to achieve a bina... | <urn:uuid:94cc3341-fdf7-44dd-a77f-757e10e132ad> | 3.84375 | 214 | Academic Writing | Science & Tech. | 31.725884 |
Introduction | Task | Materials| Teacher Process | Student Process |Evaluation | Science Curriculum Standards | Conclusion | Credits
Our water supplies the Earth with a valuable resource. Many people say that without water humans, animals and plants could not survive. Why is water so important?
The Teacher Process
The ... | <urn:uuid:ed5b5739-3a22-433e-918b-6c371d01f91b> | 3.796875 | 506 | Tutorial | Science & Tech. | 58.110392 |
There is much unknown about the ramifications of large-scale deployment of geoengineering technologies. Are they merely short-term fixes? What are the...
AerosolsLast Updated on 2013-04-10 at 17:13
Aerosols, small particles suspended in air with a lifetime of at least minutes, are either emitted as primary aerosols (du... | <urn:uuid:86cbbf34-7f37-4374-a31a-7bd0ed6531ef> | 2.71875 | 194 | Content Listing | Science & Tech. | 52.69124 |
The Exploratorium Observatory website provides resources for K-12 teachers and students including a build a solar system activity, a calculation for age and weight on other planets, and a guide to the SETI mission. The website also provides information on space weather, Saturn, the transit of Venus, the spirit and oppo... | <urn:uuid:0600682d-7e35-443f-bf34-a59fcffe2b7c> | 2.8125 | 189 | Content Listing | Science & Tech. | 24.710902 |
I made a program that i got as homework.
the question is: Write a C++ program to sum the sequence if
2/9 - 5/13 + 8/17....
till the number of terms the user wants.
I made the following program, but the answer seems to be wrong. Can someone please help me point out where have i gone wrong.
1 2 3 4 5 6 7 8 9 10 11 12 13 ... | <urn:uuid:eebbf2a6-311e-483e-be0c-28ba3597170b> | 2.96875 | 326 | Comment Section | Software Dev. | 101.449077 |
Climate Change Indicators in the United States
This figure shows how annual average temperatures in the contiguous 48 states have changed since 1901. Surface data come from land-based weather stations. Satellite measurements cover the lower troposphere, which is the lowest level of the Earth's atmosphere. "UAH" and "RS... | <urn:uuid:63629139-5d6f-4601-8aa9-fd04c1fb1667> | 3.90625 | 1,093 | Knowledge Article | Science & Tech. | 31.907518 |
Gerd Binnig’s and Heinrich Rohrer’s scanning tunneling microscope (STM) has fueled much of the nanotechnology research effort around the world. Developed in an IBM laboratory about 35 years ago (ETA May 2, 2013: the year was 1981), it was the first microscope that allowed researchers to access material at the nanoscale... | <urn:uuid:e3d39bbf-7963-46c4-83af-f0e83fdcf233> | 3.3125 | 861 | Personal Blog | Science & Tech. | 35.058389 |
Logs come in all shapes, but as applications and infrastructures grow, the result is a massive amount of distributed data that's useful to mine. From web and mail servers to kernel and boot logs, modern servers hold a rich set of information. Massive amounts of distributed data are a perfect application for Apache Hado... | <urn:uuid:0c9fee69-0d9d-4b33-8a15-851ae62aa604> | 2.90625 | 2,829 | Tutorial | Software Dev. | 50.201287 |
› View Now
Launching the NPP
Project Scientist, NPP
The purpose of the NPP is, it's basically the prototype of the next generation Earth-observing satellite. It's the nation's first attempt to really combine weather monitoring and climate observing in the same platform.
The nations' newest weather monitoring and climat... | <urn:uuid:fd2a9355-a377-40b6-a06c-a12bf384f45d> | 3.578125 | 1,200 | Audio Transcript | Science & Tech. | 47.373811 |
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Foxxification Of This Story?
Wed Aug 15 01:50:10 BST 2012 by Julian Mann
If you would care to take a look at the NS article 21.1.2009. by Graham Lawton(amongst others) an opinion is expressed there that 40 to 50 per cent of the human genome got there by HGT. Therefore the chances are act... | <urn:uuid:d25de33d-1479-4f7e-8362-531b7462ee37> | 3.296875 | 204 | Comment Section | Science & Tech. | 52.427619 |
K-T Boundary Clay.
|Sample Image | Spin Video | QuickTimeVR Rotation|
|K-T Boundary Clay.|
The K-T boundary clay is is found in thin layers all over the world at sedimentary levels that indicate it is the same age everywhere: About 65 million years ago. This is the boundary between the Cretaceous (K for some reason) an... | <urn:uuid:8926f433-2675-4040-a0fb-398df450e523> | 3.578125 | 293 | Knowledge Article | Science & Tech. | 50.298636 |
As wildfire consumes hundreds of thousands of forested acres every summer, NASA’s Earth-observing satellites keep tabs on the destruction. The Aqua and Terra satellites can help scientists and land-use managers figure out how much land has burned and where, as well as how fires are responding to the changing climate. N... | <urn:uuid:3a330414-555a-4a72-9b99-620684babb3c> | 3.265625 | 287 | Truncated | Science & Tech. | 46.599301 |
Sometimes you will need to add some points to an existing barplot. You might try
par(mfrow = c(1,2)) df <- data.frame(stolpec1 = 10 * runif(10), stolpec2 = 30 * runif(10)) barplot(df$stolpec1) lines(df$stolpec2/10) #implicitno x = 1:10 points(df$stolpec2/10)
but you will get a funky looking line/points. It’s a bit sque... | <urn:uuid:fe6ce598-b4c9-42c0-88fb-9069159309ce> | 2.75 | 333 | Tutorial | Software Dev. | 86.027753 |
An excited atom in a small cavity is precisely such as antenna, albeit a microscopic one. If the cavity is small enough, the atom will be unable to radiate because the wavelength of the oscillating field it would "like" to produce cannot fit within the boundaries. As long as the atom cannot emit a photon, it must remai... | <urn:uuid:744849a9-cef6-479a-bea6-045a7bdc761d> | 4.0625 | 889 | Academic Writing | Science & Tech. | 27.671962 |
Inside XSL-T (1/4) - exploring XML
Now that we have had so many columns with XSL examples and so few about XSL, it seems like a good idea to study XSL in more detail. XSL comes out to be a very generic mechanism for transforming document trees, at least the paperless ones...
XSL was initially devised to solve two probl... | <urn:uuid:f68e69e5-1e1c-4e75-942b-e3f912437c00> | 3.9375 | 782 | Documentation | Software Dev. | 66.60899 |
Radiant energy, called "electromagnetic radiation", is released every time an electron slows down, changes its orbit around an atom or vibrates back and forth. Through these changes in its motion, the electron creates a changing electric field.
It is an observed fact that when an electric field is changing, a magnetic ... | <urn:uuid:a260fac3-e21f-485c-b9a8-1f6f120b0863> | 3.9375 | 248 | Knowledge Article | Science & Tech. | 52.170758 |
I do not know how to explain to a 6 year old how we are able to perceive colour. Does anyone know how this can be explained?
Well, depending on the depth you want to introduce her to, it can be difficult to explain to adults - much less children. You explained the basics well enough. Without going to the molecular mech... | <urn:uuid:b63e12d3-c4dc-4c96-b429-5ba568a93ed2> | 3.578125 | 1,078 | Q&A Forum | Science & Tech. | 48.786244 |
The Thermostat Hypothesis is that tropical clouds and thunderstorms actively regulate the temperature of the earth. This keeps the earth at a equilibrium temperature.
The stability of the earth’s temperature over time has been a long-standing climatological puzzle. The globe has maintained a temperature of ± ~ 3% (incl... | <urn:uuid:0e4c2ac5-aff1-495a-872f-7db9a6759e27> | 3.890625 | 297 | Personal Blog | Science & Tech. | 43.182426 |
|addend + addend =||sum|
|minuend − subtrahend =||difference|
|multiplicand × multiplier =||product|
|dividend ÷ divisor =||quotient|
|nth root (√)|
|degree √ =||root|
In general, for non-zero integers and , it is said that divides —and, dually, that is divisible by —written:
if there exists an integer such that . Thus... | <urn:uuid:88daeba0-4b60-41c8-ba49-154c47d59817> | 3.84375 | 1,215 | Knowledge Article | Science & Tech. | 63.00463 |