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Session 40 - The Interstellar Medium.
Display session, Tuesday, June 09
Gamma Ray Burst (GRB) explosions can make kpc-size shells and holes in the interstellar media (ISM) of spiral galaxies if much of the energy heats the local gas to above 10^7 K. Disk blowout is probably the major cau... | <urn:uuid:e2300ad5-01dd-4e80-92b3-7ec88785cc9d> | 2.765625 | 208 | Content Listing | Science & Tech. | 47.385488 |
Tornadoes are the most intense storms on the planet, and they’re never discussed without at least some mention of the term wind shear. Many of us sitting at home, though, have no idea what wind shear is, or if we do, how it affects tornado production.
What is Wind Shear
Wind shear, although it might sound complex, is a... | <urn:uuid:7400301c-e625-46d5-be90-1020cf8d52f8> | 4.15625 | 573 | Personal Blog | Science & Tech. | 45.080294 |
Using the Moon as a High-Fidelity Analogue Environment to Study Biological and Behavioural Effects of Long-Duration Space Exploration
Goswami, Nandu and Roma, Peter G. and De Boever, Patrick and Clément, Gilles and Hargens, Alan R. and Loeppky, Jack A. and Evans, Joyce M. and Stein, T. Peter and Blaber, Andrew P. and V... | <urn:uuid:25dbfda6-18d6-4e04-9bf5-fe7dcc73d69b> | 3.09375 | 887 | Academic Writing | Science & Tech. | 24.740737 |
Science -- Asher et al. 307 (5712): 1091:
We describe several fossils referable to Gomphos elkema from deposits close to the Paleocene-Eocene boundary at Tsagan Khushu, Mongolia. Gomphos shares a suite of cranioskeletal characters with extant rabbits, hares, and pikas but retains a primitive dentition and jaw compared ... | <urn:uuid:fa9d11c3-ad57-40a6-8915-a8b1cd687729> | 2.921875 | 220 | Personal Blog | Science & Tech. | 36.115 |
Basic Use To make a new number, a simple initialization suffices:
var foo = 0; // or whatever number you want
foo = 1; //foo = 1 foo += 2; //foo = 3 (the two gets added on) foo -= 2; //foo = 1 (the two gets removed)
Number literals define the number value. In particular: They appear as a set of digits of varying length... | <urn:uuid:eecdd55e-49d8-40e4-9834-6f3dce28fa4c> | 3.96875 | 508 | Documentation | Software Dev. | 72.693517 |
Refraction and Acceleration
Name: Christopher S.
Why is it that when light travels from a more dense to a
less dense medium, its speed is higher? I've read answers to this
question in your archives but, sadly, still don't get it. One answer
(Jasjeet S Bagla) says that we must not ask the question because light is
massl... | <urn:uuid:d2b35c16-35c7-477e-80c7-8dded3739ec4> | 3.03125 | 794 | Q&A Forum | Science & Tech. | 58.858511 |
Giant Manta Ray
Giant Manta Ray Manta birostris
Divers often describe the experience of swimming beneath a manta ray as like being overtaken by a huge flying saucer. This ray is the biggest in the world, but like the biggest shark, the whale shark, it is a harmless consumer of plankton.
When feeding, it swims along wit... | <urn:uuid:f3984201-a44a-42d6-802f-de566b1e8a6e> | 3.09375 | 238 | Knowledge Article | Science & Tech. | 55.646214 |
|Gallium metal is silver-white and melts at approximately body temperature (Wikipedia image).|
|Atomic Number:||31||Atomic Radius:||187 pm (Van der Waals)|
|Atomic Symbol:||Ga||Melting Point:||29.76 °C|
|Atomic Weight:||69.72||Boiling Point:||2204 °C|
|Electron Configuration:||[Ar]4s23d104p1||Oxidation States:||3|
From... | <urn:uuid:317a0fc8-b8f1-4147-a9ac-f69a1f176048> | 3.46875 | 546 | Knowledge Article | Science & Tech. | 38.890701 |
If superparticles were to exist the decay would happen far more often. This test is one of the "golden" tests for supersymmetry and it is one that on the face of it this hugely popular theory among physicists has failed.
Prof Val Gibson, leader of the Cambridge LHCb team, said that the new result was "putting our super... | <urn:uuid:72def0d3-296d-49d8-bdf5-73c351dd6672> | 2.6875 | 163 | Personal Blog | Science & Tech. | 46.709545 |
Let and be two differentiable functions. We will say that and are proportional if and only if there exists a constant C such that . Clearly any function is proportional to the zero-function. If the constant C is not important in nature and we are only interested into the proportionality of the two functions, then we wo... | <urn:uuid:b7bc34b8-0f1f-4df8-8e8d-e56fc9c8fec5> | 2.6875 | 180 | Knowledge Article | Science & Tech. | 38.502318 |
Forecast Texas Fire Danger (TFD)
The Texas Fire Danger(TFD) map is produced by the National Fire Danger Rating System (NFDRS). Weather information is provided by remote, automated weather stations and then used as an input to the Weather Information Management System (WIMS). The NFDRS processor in WIMS produces a fire ... | <urn:uuid:a789fd8d-b873-45cf-b01d-af6eca242a5d> | 3.015625 | 136 | Knowledge Article | Science & Tech. | 31.717 |
x2/3 + y2/3 = a2/3
x = a cos3(t), y = a sin3(t)
Click below to see one of the Associated curves.
|Definitions of the Associated curves||Evolute|
|Involute 1||Involute 2|
|Inverse curve wrt origin||Inverse wrt another circle|
|Pedal curve wrt origin||Pedal wrt another point|
|Negative pedal curve wrt origin||Negative pe... | <urn:uuid:367a0525-d005-4467-93f1-a7ac123614d1> | 2.71875 | 409 | Knowledge Article | Science & Tech. | 54.846538 |
Science Fair Project Encyclopedia
The chloride ion is formed when the element chlorine picks up one electron to form the anion (negatively charged ion) Cl−. The salts of hydrochloric acid HCl contain chloride ions and are also called chlorides. An example is table salt, which is sodium chloride with the chemical formul... | <urn:uuid:4e76b8fd-c479-45d7-8ee7-faf61495aecb> | 4.59375 | 320 | Knowledge Article | Science & Tech. | 27.864975 |
Next: Radiative heat flux Up: Loading Previous: Distributed heat flux Contents
Convective heat flux is a flux depending on the temperature difference between the body and the adjacent fluid (liquid or gas) and is triggered by the *FILM card. It takes the form
where is the a flux normal to the surface, is the film coeff... | <urn:uuid:47d24057-e332-41de-bbe6-0338e16b49a6> | 3.3125 | 249 | Tutorial | Science & Tech. | 41.094375 |
RR Lyrae starArticle Free Pass
RR Lyrae star, any of a group of old giant stars of the class called pulsating variables (see variable star) that pulsate with periods of about 0.2–1 day. They belong to the broad Population II class of stars (see Populations I and II) and are found mainly in the thick disk and halo of th... | <urn:uuid:ca821097-b750-4e33-85da-b6754420e0dc> | 2.921875 | 171 | Knowledge Article | Science & Tech. | 63.468978 |
Study promoter activity using the Living Colors Fluorescent Timer, a fluorescent protein that shifts color from green to red over time (1). This color change provides a way to visualize the time frame of promoter activity, indicating where in an organism the promoter is active and also when it becomes inactive. Easily ... | <urn:uuid:fee85558-8ff7-41a4-9a52-a042d84e5f3a> | 2.6875 | 499 | Knowledge Article | Science & Tech. | 36.829775 |
Killing Emacs means ending the execution of the Emacs process.
If you started Emacs from a terminal, the parent process normally
resumes control. The low-level primitive for killing Emacs is
This command calls the hook
kill-emacs-hook, then exits the Emacs process and kills it.
If exit-data is an integer, that is used ... | <urn:uuid:af93ad35-c5de-4297-a667-afc7347bbc6c> | 2.6875 | 488 | Documentation | Software Dev. | 51.422678 |
Boulder trails are common to the interior of Menelaus crater as materials erode from higher topography and roll toward the crater floor. Downhill is to the left, image width is 500 m, LROC NAC M139802338L [NASA/GSFC/Arizona State University].
Most boulder trails are relatively high reflectance, but running through the ... | <urn:uuid:ce50e516-2229-404a-b328-7d80cdfd0d33> | 3.25 | 362 | Comment Section | Science & Tech. | 50.615374 |
of the Giant Squid scientifically known as Architeuthis
dux, is the largest of all invertebrates. Scientists
believe it can be as long as 18 metres (60 feet). This specimen
was collected by Dr Gordon Williamson who worked as the resident
ships biologist for the whaling company Salvesons. He examined
the stomach content... | <urn:uuid:03dc2cd4-80be-4c32-8ff8-4b196542656b> | 3.03125 | 105 | Knowledge Article | Science & Tech. | 43.41975 |
is a C based interpreter (runloop) that executes, what different compiler (like Mildew ) produce.
If you want to help SMOP, you can just take on one of the lowlevel S1P implementations and write it. If you have any questions ask ruoso or pmurias at #perl6 @ irc.freenode.org.
The Slides for the talk Perl 6 is just a SMO... | <urn:uuid:9ef4d308-fa15-4196-86db-2db8b4c54358> | 2.875 | 694 | Knowledge Article | Software Dev. | 53.614756 |
The word vivisection was first coined in the 1800s to denote the experimental dissection of live animals - or humans. It was created by activists who opposed the practice of experimenting on animals. The Roman physician Celsus claimed that in Alexandria in the 3rd century BCE physicians had performed vivisections on se... | <urn:uuid:302a84f1-d0b1-4e14-8e71-b2ded9ee5190> | 3.71875 | 392 | Knowledge Article | Science & Tech. | 36.06538 |
The Weekly Newsmagazine of Science
Volume 155, Number 19 (May 8, 1999)
|<<Back to Contents|
By J. Raloff
Canadian scientists have identified the likely culprit behind some historic, regional declines in Atlantic salmon. The researchers find that a near-ubiquitous water pollutant can render young, migrating fish unable ... | <urn:uuid:3ac50003-34df-4326-9ff5-f4278ff44a0b> | 3.109375 | 978 | Truncated | Science & Tech. | 47.450967 |
Gaia theory is a class of scientific models of the geo-biosphere in which life as a whole fosters and maintains suitable conditions for itself by helping to create an environment on Earth suitable for its continuity. The first such theory was created by the atmospheric scientist and chemist, Sir James Lovelock, who dev... | <urn:uuid:7a3fa081-9c60-42a7-8ec4-1d8c386b4009> | 3.4375 | 794 | Knowledge Article | Science & Tech. | 23.657602 |
Giant Water Scavenger Beetle
|Geographical Range||North America|
|Scientific Name||Hydrophilus triangularis|
|Conservation Status||Not listed by IUCN|
The name says it all. This large beetle lives in water, where it scavenges vegetation and insect parts. The insect can store a supply of air within its silvery belly, mu... | <urn:uuid:469863a4-9f80-47c2-ad04-ee7f0adecfd5> | 3.078125 | 91 | Knowledge Article | Science & Tech. | 34.880113 |
WAKING the GIANT Bill McGuire
While we transmit more than two million tweets a day and nearly one hundred trillion emails each year, we're also emitting record amounts of carbon dioxide (CO2). Bill McGuire, professor of geophysical and climate hazards at University College London, expects our continued rise in greenhou... | <urn:uuid:46ed79e4-97dd-492f-bf29-99304e01f4ee> | 3.046875 | 330 | Nonfiction Writing | Science & Tech. | 28.729356 |
Want to stay on top of all the space news? Follow @universetoday on Twitter
Sidereal Time is the time is takes for celestial bodies to ascend and descend in the night sky. We know that celestial bodies are in reality, fixed in their positions. The reason for their dramatic movement in the night is because of the rotati... | <urn:uuid:678e8811-82bd-4c27-af17-f540e64bc52a> | 3.75 | 564 | Knowledge Article | Science & Tech. | 54.148823 |
Here's the way the NWS defines it:
Forecasts issued by the National Weather Service routinely include a "PoP" (probability of precipitation) statement, which is often expressed as the "chance of rain" or "chance of precipitation".http://www.srh.noaa.gov/ffc/?n=pop
ZONE FORECASTS FOR NORTH AND CENTRAL GEORGIA
NATIONAL W... | <urn:uuid:64f70112-bac2-48dc-87e7-d1404797fade> | 3.421875 | 616 | Comment Section | Science & Tech. | 73.397381 |
A compiler is a computer program that takes code and generates either object code or translates code in one language into another language. When it generates code into another language usually the other language is either compiled (into object code) , interpreted , or even compiled again into another language. Object c... | <urn:uuid:880d3bad-144c-4602-89ac-2eec0a853e79> | 3.40625 | 102 | Knowledge Article | Software Dev. | 25.430852 |
GloMax®-Multi Jr Method for DNA Quantitation Using Hoechst 33258
- Comments & Ratings
Quantitation of DNA is an important step for many practices in molecular biology. Common techniques that use DNA, such as sequencing, cDNA synthesis and cloning, RNA transcription, transfection, nucleic acid labeling (e.g., random pri... | <urn:uuid:8cdb1656-8511-466e-b3f6-681a7cf80615> | 2.734375 | 149 | Knowledge Article | Science & Tech. | 28.8033 |
.NET Type Design Guidelines
|Visual C# Tutorials|
|.NET Framework Tutorials|
.NET Type Design Guidelines
|© 2006 Microsoft Corp.|
|This tutorial—.NET Type Design Guidelines—is from Framework Design Guidelines: Conventions, Idioms, and Patterns for Reusable .NET Libraries, by Krzysztof Cwalina, Brad Abrams. Copyright © ... | <urn:uuid:6c35af72-3e52-40ad-bf2e-d5f5676c535e> | 3 | 868 | Documentation | Software Dev. | 42.544528 |
The Physics Help Forum not working today, at least not from my ISP, so this goes here. It's basically a math deal anyway:
The formula to calculate the force of a point of mass, let's call them planets, that results from its being gravitationally attracted by another point of mass is Newton's:
Where is the force of the ... | <urn:uuid:7d99e7e1-4e2a-4168-989f-9de25f473394> | 3.53125 | 480 | Q&A Forum | Science & Tech. | 58.705377 |
New study challenges previous findings that humans are an altruistic anomaly, and positions chimpanzees as cooperative, especially when their partners are patient.
Researchers at the Yerkes National Primate Research Center, have shown chimpanzees have a significant bias for prosocial behavior. This, the study authors r... | <urn:uuid:5d537746-8ad2-44d6-8586-ae6a035cf9b2> | 3.09375 | 228 | Personal Blog | Science & Tech. | 26.0775 |
Elements | Blogs
Wednesday, September 7, 2011
Is There Oxygen in Space?
Yes, this summer astronomers using the Herschel Telescope identified oxygen molecules in space. They found these molecules in the Orion nebula, 1,344 light years away. Oxygen is the third most abundant element in the universe. Until now, scientists... | <urn:uuid:b5177112-be1e-4086-9d85-858522f9c4b9> | 2.921875 | 735 | Content Listing | Science & Tech. | 66.67267 |
Air MassAn extensive body of the atmosphere whose physical properties, particularly temperature and humidity, exhibit only small and continuous differences in the horizontal. It may extend over an area of several million square kilometres and over a depth of several kilometres.
Backing WindCounter-clockwise change of w... | <urn:uuid:c43d0fad-4182-427f-88ff-559827fbce8b> | 3.484375 | 1,023 | Structured Data | Science & Tech. | 32.817154 |
Science Fair Project Encyclopedia
The sampling frequency or sampling rate defines the number of samples per second taken from a continuous signal to make a discrete signal. The inverse of the sampling frequency is the sampling period or sampling time, which is the time between samples.
The sampling frequency can only b... | <urn:uuid:d25b5562-8f30-4fd1-bc51-46f94956427e> | 3.984375 | 414 | Knowledge Article | Science & Tech. | 55.315025 |
The life-giving ideas of chemistry are not reducible to physics. Or, if one tries to reduce them, they wilt at the edges, lose not only much of their meaning, but interest too. And, most importantly, they lose their chemical utility—their ability to relate seemingly disparate compounds to each other, their fecundity in... | <urn:uuid:17b06ea8-6a78-4eda-b899-ce63819d7113> | 3.046875 | 2,582 | Comment Section | Science & Tech. | 42.922943 |
You have to like the attitude of Thomas Henning (Max-Planck-Institut für Astronomie). The scientist is a member of a team of astronomers whose recent work on planet formation around TW Hydrae was announced this afternoon. Their work used data from ESA’s Herschel space observatory, which has the sensitivity at the neede... | <urn:uuid:a225f201-6f03-4503-bb76-bd2fde1838a7> | 3.515625 | 1,210 | Knowledge Article | Science & Tech. | 46.712272 |
Consider four vectors ~ F1, ~ F2, ~ F3, and ~ F4, wheretheir
magnitudes are F1= 43 N, F2= 36 N, F3 = 19 N, andF4 = 54 N.Let
θ1 =120o, θ2 =
−130o,θ3 = 200, and θ4 =
−67o, measured from thepositive x axis with
the counter-clockwiseangular direction aspositive.
What is the magnitudeof the resultant vector ~F , where ~F = ... | <urn:uuid:6424f806-15f1-4352-8ed4-15e67ff2dc91> | 3.375 | 267 | Q&A Forum | Science & Tech. | 80.950653 |
An electron is a subatomic particles of spin 1/2. It couples with photons and, thus, is electrically charged. It is a lepton with a rest mass of 9.109 * 10 − 31kg and an electric charge of − 1.602 * 10 − 19 C, which is the smallest known charge possible for an isolated particle (confined quarks have fractional charge).... | <urn:uuid:e1790b63-dd2a-43d8-ae60-c3a435647df2> | 3.859375 | 352 | Knowledge Article | Science & Tech. | 58.2225 |
Math is the basis for music, but for those of us who aren’t virtuosic at either, the connection isn’t always easy to grasp. Which is what makes the videos of Vi Hart, a “mathemusician” with a dedicated YouTube following, so wonderful. Hart explains complex phenomena--from cardioids to Carl Gauss--using simple (and ofte... | <urn:uuid:a37519b2-ce71-4875-976f-9b4e9a28090c> | 3.28125 | 346 | Personal Blog | Science & Tech. | 59.43732 |
The clock Command
The clock command has facilities for getting the current time, formatting time values, and scanning printed time strings to get an integer time value. The clock command was added in Tcl 7.5. Table 13-1 summarizes the clock command:
Table 13-1. The clock command.
|clock clicks||A system-dependent high ... | <urn:uuid:f36d7530-13dd-4d6a-8426-ea739f255160> | 3.765625 | 1,432 | Documentation | Software Dev. | 94.315313 |
|This is a measure of the brightness of a celestial object. The lower the value, the brighter the object, so magnitude -4 is brighter than magnitude 0, which is in turn brighter than magnitude +4. The scale is logarithmic, and a difference of 5 magnitudes means a brightness difference of exactly 100 times. A difference... | <urn:uuid:a13e5774-8a15-4ad6-bc01-def7c66a2edb> | 4.25 | 260 | Structured Data | Science & Tech. | 60.330227 |
Range: Vancouver - Baja Calif. depth: 6-18 (38) m.
Table of Contents
The Sea Grape
Commonly known as "sea grapes," Botryocladia (botryo=grape,
cladia=branches) pseudodichotoma is an abundant member of the RHODOPHYTA
(red algae). The following phylogeny consists of links to list of common
characteristics which justify B... | <urn:uuid:5af214eb-c261-4fff-a47c-c2ca3a8e2822> | 2.875 | 452 | Knowledge Article | Science & Tech. | 26.541283 |
Joined: 16 Mar 2004
|Posted: Tue Aug 04, 2009 2:40 pm Post subject: Immune Responses Jolted into Action by Nanohorns
|The immune response triggered by carbon nanotube-like structures could be harnessed to help treat infectious diseases and cancers, say researchers.
The way tiny structures like nanotubes can trigger som... | <urn:uuid:5cade7be-722d-4875-86c2-cdb3dd43ad4f> | 3.390625 | 593 | Comment Section | Science & Tech. | 32.083152 |
Atomic oxygen, a corrosive space gas, finds many applications on Earth.
An Atomic Innovation for Artwork
Oxygen may be one of the most common substances on the planet, but recent space research has unveiled a surprising number of new applications for the gas, including restoring damaged artwork.
It all started with a c... | <urn:uuid:672eb588-eeaa-401f-81e0-1a0e5c9d984f> | 3.703125 | 714 | Knowledge Article | Science & Tech. | 27.007077 |
Evolution can fall well short of perfection. Claire Ainsworth and Michael Le Page assess where life has gone spectacularly wrong
THE ascent of Mount Everest's 8848 metres without bottled oxygen in 1978 suggests that human lungs are pretty impressive organs. But that achievement pales in comparison with the feat of the ... | <urn:uuid:ad635de7-8a5e-4c98-be53-8c463594f176> | 3.28125 | 207 | Truncated | Science & Tech. | 59.637347 |
New Zealand grasshoppers belong to the subfamily Catantopinae. A number of species are present including the common small Phaulacridium of the more coastal areas, the larger species of Sigaus of the tussock lands, and the alpine genera Paprides and Brachaspis, which include some quite large species. These inhabit the a... | <urn:uuid:feefb68d-09c3-45d7-bc1b-52166c84268c> | 3.515625 | 196 | Knowledge Article | Science & Tech. | 45.262532 |
In mathematics, hyperbolic functions are analogs of the ordinary trigonometric, or circular, functions. The basic hyperbolic functions are the hyperbolic sine "sinh" (typically pronounced /ˈsɪntʃ/ or /ˈʃaɪn/), and the hyperbolic cosine "cosh" (typically pronounced /ˈkɒʃ/), from which are derived the hyperbolic tangent ... | <urn:uuid:34eefbfb-968b-4240-9caa-0182a3ca0559> | 4.0625 | 1,119 | Knowledge Article | Science & Tech. | 37.831287 |
This is one of my favorite stories. In short, one of John Burk’s (@occam98) students wanted to launch a space balloon. If you want all the details, this post at Quantum Progress pretty much says it all. The part that makes this story so cool is that it was the student who did all of the set up and fundraising and stuff... | <urn:uuid:ab1372c3-67f1-40bb-a97d-79e3d444774a> | 2.8125 | 1,668 | Personal Blog | Science & Tech. | 77.914116 |
If you really want to hit a home run with a global warming story, manage to link climate change to the beloved rainforest of the Amazon. The rainforest there is considered by many to be the “lungs of the planet,” the rainforest surely contains a cure for any ailment imaginable, all species in the place are critical to ... | <urn:uuid:1d043e2c-548a-4380-aff6-44daad02285d> | 2.84375 | 1,450 | Personal Blog | Science & Tech. | 33.824703 |
Consider the following in Haskell:
let p x = x ++ show x in putStrLn $ p"let p x = x ++ show x in putStrLn $ p"
Evaluate this expression in an interactive Haskell session and it prints itself out. But there's a nice little cheat that made this easy: the Haskell 'show' function conveniently wraps a string in quotation m... | <urn:uuid:e9f8736e-fa3e-4ea6-b907-b80b1d97b5d9> | 3.171875 | 1,215 | Personal Blog | Software Dev. | 69.541045 |
Gold has been known since prehistory. The symbol is derived from Latin aurum (gold).
AuI 9.2 eV, AuII 20.5 eV, AuIII 30.0 eV.
Absorption lines of AuI
In the sun, the equivalent width of AuI 3122(1) is 0.005.
Behavior in non-normal stars
The probable detection of Au I was announced by Jaschek and Malaroda (1970) in one ... | <urn:uuid:8d506fc6-f879-413c-9824-20930fe8e0a0> | 3.75 | 240 | Structured Data | Science & Tech. | 77.703306 |
Adult survival rates of Shag (Phalacrocorax aristotelis), Common Guillemot (Uria aalge), Razorbill (Alca torda), Puffin (Fratercula arctica) and Kittiwake (Rissa tridactyla) on the Isle of May 1986-96
Harris, M. P.; Wanless, S.; Rothery, P.. 2000 Adult survival rates of Shag (Phalacrocorax aristotelis), Common Guillemo... | <urn:uuid:c2223b59-5dd0-474f-acd5-a52f82c794e8> | 2.765625 | 516 | Academic Writing | Science & Tech. | 31.554757 |
I’ve been looking for a good, easy to read document outlining the latest climate science research and putting it in context for Copenhagen and I think I’ve found it.
Today in Sydney, the Climate Change Research Centre, a unit of the University of New South Wales, released The Copenhagen Diagnosis. It’s free to download... | <urn:uuid:6de73326-296f-4b7a-b8ba-84761d55c25e> | 2.78125 | 1,051 | Personal Blog | Science & Tech. | 41.26094 |
Classifying Critical Points
So let’s say we’ve got a critical point of a multivariable function . That is, a point where the differential vanishes. We want something like the second derivative test that might tell us more about the behavior of the function near that point, and to identify (some) local maxima and minima... | <urn:uuid:1470b6e0-0c2a-416e-a3f3-01bb7910efed> | 2.6875 | 931 | Academic Writing | Science & Tech. | 42.500034 |
Science Fair Project Encyclopedia
Cryonics is the practice of preserving organisms, or at least their brains, for possible future revival by storing them at cryogenic temperatures where metabolism and decay are almost completely stopped.
An organism held in such a state (either frozen or vitrified) is said to be cryopr... | <urn:uuid:808b609d-c9b2-4043-aeea-548f59273c25> | 3.4375 | 2,487 | Knowledge Article | Science & Tech. | 20.021667 |
Next: Measuring Rotation
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Right Triangles, Bearings, and other Applications
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Last August, a 3,000-pound, eight-by-22 foot-robotic platform was launched into the Hudson River just north of Denning’s Point Peninsula in Beacon, N.Y.
On board the floating platform are state-of-the-art sensors that will provide continuous air and water monitoring including barometric pressure, wind speed and directi... | <urn:uuid:02237b71-3d97-43b4-b615-8779adad0180> | 3.03125 | 982 | Knowledge Article | Science & Tech. | 32.182778 |
I saw some tutorial pages on the internet about how to read files using C++
But I'm kind of confused because there isn't anything in code indicate where the file is from. So I think I need some explanation.
It will open file in current (working) folder. If you want to open file which is in another folder you may write ... | <urn:uuid:539cacc7-a7b0-4ae5-a649-fc47d6f41c8c> | 3.375 | 242 | Q&A Forum | Software Dev. | 49.120155 |
THE FRAGILE FAUNA OF ILLINOIS CAVES
by Steven J. Taylor and Donald W. Webb
Illinois has several hundred caves, many of them in nearly pristine condition.
This unique and fragile environment is home to a diverse array of creatures,
including organisms that are completely limited to the cave environment,
species that may... | <urn:uuid:df2ab0ff-bb86-415b-be4c-863c8014597f> | 3.78125 | 3,029 | Knowledge Article | Science & Tech. | 21.357917 |
There are many types of biomass—organic matter such as plants,
residue from agriculture and forestry, and the organic component of
municipal and industrial wastes—that can now be used to produce fuels,
chemicals, and power. Wood has been used to provide heat for thousands of
years. This flexibility has resulted in incr... | <urn:uuid:43454431-e724-4640-b136-09b9e018b7c6> | 3.828125 | 1,230 | Knowledge Article | Science & Tech. | 24.609679 |
Introductionfox, carnivorous mammal of the dog family, found throughout most of the Northern Hemisphere. It has a pointed face, short legs, long, thick fur, and a tail about one half to two thirds as long as the head and body, depending on the species. Solitary most of the year, foxes do not live in dens except in the ... | <urn:uuid:b06f1991-fec6-49bf-b55b-75db6d59f18d> | 3.5 | 382 | Knowledge Article | Science & Tech. | 50.583511 |
Here is a fun one,
There was a man who greatly enjoyed golf. He also could make a perfectly consistent swing. So out of curiosity he decided to challenge a mathematician. So first he brought the mathematician to a golf field, with his golf club, a tee, and a ball. He sets the ball on the tee, all ready to swing, and th... | <urn:uuid:070e6cdd-a083-43f2-9577-27e03e835620> | 2.765625 | 201 | Comment Section | Science & Tech. | 65.922443 |
New on the IBM developerWorks, there's an article looking at using the Scilab software integrated into PHP to perform some more complicated mathematical processing.
Scripting languages like Ruby, Python, and PHP power modern-day server-side Web development. These languages are great because you can easily and rapidly b... | <urn:uuid:134f1f86-6c7d-48c9-abb1-a1be577339f4> | 2.6875 | 199 | Truncated | Software Dev. | 42.139 |
Gamma ray bursts
are believed to be the most energetic phenomena in the universe.
In one second they can emit more than 100 times the energy that
the sun does throughout its entire 10 billion year life. This energy
output is short lived, however, and within days the burst has faded
forever beyond the reach of our teles... | <urn:uuid:41af5c95-84cb-4b31-990a-6fbb28055062> | 3.875 | 327 | Knowledge Article | Science & Tech. | 29.343642 |
During this tutorial you will be asked to perform calculations involving trigonometric functiions. You will need a calulator to proceed.
| The purpose of this tutorial
is to review with you the elementary properties of the trigonometric functions.
Facility with this subject is essential to success in all branches of sc... | <urn:uuid:00f865ac-a066-4877-8d69-479bd1350ad2> | 4.0625 | 1,681 | Tutorial | Science & Tech. | 79.495224 |
|May20-06, 05:24 PM||#1|
Stuck on couple related rates problems..
1. A ship with a long anchor chain is anchored in 11 fathoms of water. The anchor chain is being wound in at a rate of 10 fathoms/minute, causing the ship to move toward the spot directly above the anchor resting on the seabed. The hawsehole ( the point ... | <urn:uuid:db125f45-2e18-420f-93eb-28e0f5ee7577> | 2.71875 | 677 | Comment Section | Science & Tech. | 82.256139 |
Last July (2012), I heard from a colleagues working at the edge of the Greenland ice sheet, and from another colleague working up at the Summit. Both were independently writing to report the exceptional conditions they were witnessing. The first was that the bridge over the Watson river by the town of Kangerlussuaq, on... | <urn:uuid:c8dad88b-1cd0-43ad-8153-71e09064a07e> | 2.78125 | 251 | Personal Blog | Science & Tech. | 59.101364 |
Search: Nuclear chemistry, Darmstadtium, Germany
In honour of scientist and astronomer Nicolaus Copernicus (1473-1543), the discovering team around Professor Sigurd Hofmann suggested the name copernicium with the element symbol Cp for the new element 112, discovered at the GSI Helmholtzzentrum für Schwerionenforschung ... | <urn:uuid:149ab25b-f1f4-4231-88ea-4e1968ed8a9d> | 3.671875 | 1,178 | Knowledge Article | Science & Tech. | 37.686338 |
Given all the evidence presently available, we believe it entirely reasonable that Mars is inhabited with living organisms and that life independently originated there
The conclusion of a study by the National Academy of Sciences in March 1965, after 88 years of surveying the red planet through blurry telescopes. Four ... | <urn:uuid:132d7809-ba28-4c89-8ce0-867a2a81c1e6> | 4.1875 | 300 | Content Listing | Science & Tech. | 42.244446 |
By Alexander Villafania INQUIRER.NET In the aftermath of perhaps the worst typhoon that struck Metro Manila in recent years, environmental groups are blaming climate change for the effects of âOndoyâ (international name âKetsanaâ). In different statements, the World Wildlife Fund (WWF) and Greenpeace warned that such a... | <urn:uuid:02304444-c95f-4f31-9bf8-87f611ecbc3f> | 2.71875 | 2,828 | Comment Section | Science & Tech. | 40.463503 |
Our Changing Ocean
Vast and powerful though the ocean is people have changed it. It’s a different ocean now.
The ocean’s enduring surface beauty hides its plight. But the ocean today is a diminished version of a much healthier ocean of not so long ago.
The ocean is the source of about half the oxygen we breathe, much o... | <urn:uuid:37813f25-88c4-46b8-a404-67d7ad70dc62> | 3.0625 | 1,062 | Knowledge Article | Science & Tech. | 39.662902 |
Chandra "Hears" a Supermassive Black Hole in Perseus
A 53-hour Chandra observation of the central region of the Perseus galaxy cluster (left) has revealed wavelike features (right) that appear to be sound waves. The features were discovered by using a special image-processing technique to bring out subtle changes in br... | <urn:uuid:7c5032f8-872f-474b-bda7-8c70bc31adaa> | 4.34375 | 389 | Knowledge Article | Science & Tech. | 43.14427 |
Declares a cursor definition.
A cursor is declared in accordance with the select-statement or the result set procedure call specified in procedure-call-statement.
The select-statement may be specified explicitly in ordinary embedded SQL applications or by the name of a prepared select-statement, identified by statement... | <urn:uuid:b1993193-d6e1-462e-bd4a-4801beb1522b> | 2.84375 | 803 | Documentation | Software Dev. | 36.165247 |
Scientists have long projected that areas north and south of the tropics will grow drier in a warming world –- from the Middle East through the European Riviera to the American Southwest, from sub-Saharan Africa to parts of Australia.
These regions are too far from the equator to benefit from the moist columns of heate... | <urn:uuid:71855304-2f8a-4425-8945-02a9b90be1ae> | 3.078125 | 203 | Truncated | Science & Tech. | 46.19395 |
Many people are confused about the concepts in DBus. This page gives an analogy to the web which should help to explain things.
- unique bus name
- well-known bus name
- object path
- method name
- in parameters
- out parameters
Web Server Analogy
- unique bus name is like an IP address. In particular it is dynamic.
- ... | <urn:uuid:cb0bcce9-2024-41cc-84bb-9ebb601e44b8> | 3.03125 | 295 | Knowledge Article | Software Dev. | 39.245758 |
The effect of UVR on biological systems is wavelength dependent. Action spectrum for DNA damage is an essential component of understanding the effects of increased UVB on a range of Antarctic invertebrate larvae. The wavelength dependency is quantified using spectral weighting functions which provide information such a... | <urn:uuid:8aa7e8f1-43dd-4954-ad12-56a69e48c91b> | 3.078125 | 263 | Academic Writing | Science & Tech. | 29.766875 |
Sketch the graph of the following.
Any help would be appreciated!
You know that there are two vertical asymptotes at x = 5 and x = -3, then the graph also tends to the line y = x as x becomes large.
Since there are two asymptotes, the graph is in three parts and as similar graphs, the central part is fairly similar to ... | <urn:uuid:b6dc6fda-e814-45bf-8df1-b4f612a1c966> | 2.796875 | 136 | Q&A Forum | Science & Tech. | 69.590585 |
You have an empty container, and an infinite number of marbles, each numbered with an integer from 1 to infinity.
At the start of the minute, you put marbles 1 - 10 into the container, then remove one of the marbles and throw it away. You do this again after 30 seconds, then again in 15 seconds, and again in 7.5 second... | <urn:uuid:d185d41e-eca2-40cb-80e0-525a863d830c> | 2.921875 | 350 | Comment Section | Science & Tech. | 60.809695 |
What is API?
API is an interface that allows software programs to interact with each other. It defines a set of rules that should be followed by the programs to communicate with each other. APIs generally specify how the routines, data structures, etc. should be defined in order for two applications to communicate. API... | <urn:uuid:7cf35450-4a45-4a04-92c2-84c70317cbd0> | 3.40625 | 462 | Q&A Forum | Software Dev. | 39.488346 |
In Python, for a binary file, I can write this:
buf_size=1024*64 # this is an important size... with open(file, "rb") as f: while True: data=f.read(buf_size) if not data: break # deal with the data....
With a text file that I want to read line-by-line, I can write this:
with open(file, "r") as file: for line in file: #... | <urn:uuid:49c7c0b6-a2ce-4617-b05c-a6e4bae21e61> | 2.78125 | 319 | Q&A Forum | Software Dev. | 85.561623 |
Explanation: Please wait while one of the largest mobile machines in the world crosses the road. The machine pictured above is a bucket-wheel excavator used in modern surface mining. Machines like this have given humanity the ability to mine minerals and change the face of planet Earth in new and dramatic ways. Some op... | <urn:uuid:7e88181f-71be-4790-9182-7f6015ab60d7> | 3.265625 | 155 | Personal Blog | Science & Tech. | 49.371154 |
July Rendezvous with Vesta
"We often refer to Vesta as the smallest terrestrial planet," said Christopher T. Russell, a UCLA professor of geophysics and space physics and the mission's principal investigator. "It has planetary features and basically the same structure as Mercury, Venus, Earth and Mars. But because it i... | <urn:uuid:62f9a0fe-badd-43cc-ae00-acdb6adf5f1a> | 3.640625 | 1,015 | Knowledge Article | Science & Tech. | 53.927142 |
Algae plus salt water equals … fuel? Bilal Bomani wants to create a biofuel that is "extreme green"— sustainable, alternative and renewable. At NASA's GreenLab Research Facility, he uses algae and halophytes to create a self sustaining, renewable energy ecosystem that doesn't consume arable land or fresh water.
Bilal B... | <urn:uuid:eed9527c-7d8a-4dfb-812f-9c0597ec971d> | 3.296875 | 129 | Nonfiction Writing | Science & Tech. | 31.717 |
Exploring Nonlinear Mechanical Behaviour of Rocks at LANCE
SMARTS - Spectrometer for Materials Research at Temperature and Stress
Atomic-scale stress-strain information obtained from the neutron Rietveld data indicate that the strain experienced by the crystalline quartz is ~1/5 of the macroscopic strain (the rest take... | <urn:uuid:cc2dd5ff-dead-495c-b3ab-c30e87bf94c3> | 2.90625 | 652 | Academic Writing | Science & Tech. | 26.517243 |
tree-equal tree-1 tree-2 &key test test-not => generalized-boolean
Arguments and Values:
test---a designator for a function of two arguments that returns a generalized boolean.
test-not---a designator for a function of two arguments that returns a generalized boolean.
generalized-boolean---a generalized boolean.
tree-e... | <urn:uuid:0dff129e-b6b0-4cf2-aef9-9316f348a147> | 3.234375 | 402 | Documentation | Software Dev. | 73.98829 |
Texas Dust Storms
The same weather system that brought snow and ice to the American Midwest just after Thanksgiving 2005 also kicked up significant dust in western Texas and eastern Mexico. The winds associated with this cold front also fanned the flames of grass fires in the region, adding smoke to the mixture of aero... | <urn:uuid:2091f67c-e700-47ea-81fd-57c4320514bc> | 3.421875 | 164 | Knowledge Article | Science & Tech. | 49.772164 |
DID shrinking guts and high-energy food help us evolve enormous, powerful brains? The latest round in the row over what's known as the "expensive tissue hypothesis" says no. But don't expect that to settle the debate.
The hypothesis has it that in order to grow large brains relative to body size, our ancestors had to f... | <urn:uuid:5da2971f-7ad1-46da-8894-812addcdbae4> | 3.0625 | 338 | Truncated | Science & Tech. | 51.253 |
S-1. Sunlight & Earth
S-1B. Global Climate
S-3.The Magnetic Sun
S-4. Colors of Sunlight
Optional: Doppler Effect
S-4A-1 Speed of Light
S-4A-2. Frequency Shift
S-4A-3 Rotating Galaxies
and Dark Matter
S-5.Waves & Photons
Optional: Quantum Physics
Q3. Energy Levels
Q4. Radiation from
One widely used property of waves is ... | <urn:uuid:9268091d-e08f-49a1-9c2a-bfdc6d447834> | 3.859375 | 1,410 | Knowledge Article | Science & Tech. | 46.500109 |
Mechanics: Circular Motion and Gravitation
Circular Motion and Gravitation: Audio Guided Solution
A loop de loop track is built for a 938-kg car. It is a completely circular loop - 14.2 m tall at its highest point. The driver successfully completes the loop with an entry speed (at the bottom) of 22.1 m/s.
a. Using ener... | <urn:uuid:1d779db4-f950-4006-9a69-5785000fcf08> | 3.671875 | 380 | Tutorial | Science & Tech. | 64.747194 |
Should I write: [itex](1-t)[(1-t)(2-t)-2 = -(t-3)(t-1)(t)[/itex]. This is the characteristic polynomial. Thus, the roots are 3,1,0. These are the eigenvalues. If I have equations,
(1-t)x + 2y = 0
1x + (2-t)y = 0
(1-t)z = 0,
and I plug in for t=0,1,3, I find for t=3 that eigenvectors are multiples of (1,1,0). For t=1, e... | <urn:uuid:42c86bf5-494c-4912-bdda-c646595625e6> | 2.875 | 247 | Q&A Forum | Science & Tech. | 100.506786 |
This Site is
ICRA and SafeSurf
For All Ages!
Descriptions of the Fields of Science
Chemistry is the science of matter at or near the atomic scale. (Matter is the substance of which all physical objects are made.)
Chemistry deals with the properties of matter, and the transformation and interactions of matter and energy... | <urn:uuid:65386665-f202-4b45-8afc-b2c62fb38072> | 3.484375 | 234 | Knowledge Article | Science & Tech. | 38.210655 |
A group of researchers at DTU Space is developing an observatory to be mounted on the International Space Station. Called ASIM, the observatory will among other things photograph giant lightning discharges above the clouds. The objective is to determine whether giant lightning discharges affect the Earth’s climate.
The... | <urn:uuid:64609457-8d80-4c2f-9854-ad43579b4866> | 3.90625 | 231 | Knowledge Article | Science & Tech. | 24.952379 |
Comparison of water in two adjacent watersheds before and after implementing a brush management strategy in one of the watersheds helps us see what water resource characteristics are sensitive to brush management and how.
Changes in the way communities address potential problems with stormwater runoff may affect surfac... | <urn:uuid:bfd6d5a9-0ff7-493f-be13-62a7869b0cf1> | 2.890625 | 257 | Content Listing | Science & Tech. | 23.707624 |
During the week of May 13th, the CO2 level at the Mauna Loa Observatory in Hawaii topped 400 ppm repeatedly. Daily levels of CO2 can vary due to weather, and there are seasonal trends as well. The level of atmospheric greenhouse gases continues to increase, now over 120 ppm since the Industrial Revolution began. For mo... | <urn:uuid:9316d379-1f75-4e3f-992c-57d24c0b89af> | 3 | 353 | Content Listing | Science & Tech. | 57.035238 |
Douglass Jacobs, an associate professor of forestry and natural resources, found that American chestnuts grow much faster and larger than other hardwood species, allowing them to sequester more carbon than other trees over the same period. And since American chestnut trees are more often used for high-quality hardwood ... | <urn:uuid:ade2c38d-a45b-4987-9c84-8d2fc184da53> | 3.84375 | 396 | Personal Blog | Science & Tech. | 35.308634 |
int WidthInInches(int feet);
// Initialize variables by calling functions.
int feet = WidthInFeet();
int wd = WidthInInches(feet);
// Display results.
std::cout << "Width in inches = " << wd;
std::cout << "Enter width in feet: ";
std::cin >> feet;
int WidthInInches(int feet)
return feet * 12;
I'm a new to C++ and I und... | <urn:uuid:a1a9e390-3568-45d2-be7e-695120f07aa9> | 3.15625 | 150 | Documentation | Software Dev. | 73.456759 |
Special & General Relativity Questions and Answers
If a photon travels at the speed of light, why isn't its mass infinite?
Because the photon is one of those handful of particles ( photon, graviton, gluon) which has 'zero rest mass'. The special relativistic formula that shows mass increasing with speed only applies to... | <urn:uuid:7b69a7b7-162d-4061-84c4-c0b93d50fd95> | 3.140625 | 142 | Q&A Forum | Science & Tech. | 45.252333 |
The theory behind fossil fuels is actually quite simple. Burning coal, natural gas, and petroleum releases energy stored in the fuel as heat. The energy contained by the fuels is derived from the energy of the sun. For more detailed explanations of the origins of the different fossil fuels, visit the coal, natural gas,... | <urn:uuid:9af8df0e-8b5a-4355-b5f1-b4a57327a9fb> | 3.984375 | 181 | Knowledge Article | Science & Tech. | 35.081623 |
Many, see text.
Hummingbirds (family Trochilidae) are small birds capable of hovering in mid-air due to the rapid flapping of their wings (15 to 80 beats per second, depending on the size of the bird). They are named for the characteristic hum of this rapid wing motion. They are the only birds that can fly backwards.
H... | <urn:uuid:10898cf8-af56-42f3-863a-7a402ec5c489> | 3.96875 | 1,502 | Knowledge Article | Science & Tech. | 40.922178 |