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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 | 0 |
Wikipedia sobre física de partículas
Rapidinho. Me falaram que a definição de física de partículas da Wikipedia era muito ruim. E de fato, era assim:
Particle physics is a branch of physics that studies the elementary particle|elementary subatomic constituents of matter and radiation, and their interactions. The field ... | <urn:uuid:e7f0a003-07f1-4148-a77c-6e0cb215fc0e> | 3 | 419 | Comment Section | Science & Tech. | 30.5235 | 1 |
Belgian physicist Francois Englert, left, speaks with British physicist… (Fabrice Coffrini / AFP/Getty…)
For physicists, it was a moment like landing on the moon or the discovery of DNA.
The focus was the Higgs boson, a subatomic particle that exists for a mere fraction of a second. Long theorized but never glimpsed, t... | <urn:uuid:fb237ffb-9cc0-4077-99d5-56c6fce1ca5f> | 2.59375 | 1,134 | Truncated | Science & Tech. | 48.351553 | 2 |
By Jason Kohn, Contributing Columnist
Like many of us, scientific researchers tend to be creatures of habit. This includes research teams working for the National Oceanic and Atmospheric Administration (NOAA), the U.S. government agency charged with measuring the behavior of oceans, atmosphere, and weather.
Many of the... | <urn:uuid:c23e3842-a002-4f6b-9554-bafecec0beed> | 3.3125 | 899 | News (Org.) | Science & Tech. | 28.323894 | 3 |
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 | 4 |
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 | 5 |
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 | 6 |
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 | 7 |
Data structures for manipulating (biological) sequences.
Generally supports both nucleotide and protein sequences, some functions,
like revcompl, only makes sense for nucleotides.
|A sequence is a header, sequence data itself, and optional quality data.
Sequences are type-tagged to identify them as nucleotide, amino ac... | <urn:uuid:0811e322-860e-4f42-9263-ac9ca9ec229a> | 2.59375 | 838 | Documentation | Software Dev. | 35.095195 | 8 |
The Javan rhinoceros is one of the most rare animals in the world and it was just spotted on video tape.
Seamen have long reported miraculous sightings of luminous, glowing seawater.
You know how animals are supposed to be able sense disasters before they happen? Well some believe it’s a myth, though there are lots of ... | <urn:uuid:19ce4a7d-7ae3-489c-8be3-7b90046f895d> | 2.53125 | 134 | Content Listing | Science & Tech. | 49.290268 | 9 |
Chinese researchers have turned to the light absorbing properties of butterfly wings to significantly increase the efficiency of solar hydrogen cells, using biomimetics to copy the nanostructure that allows for incredible light and heat absorption.
Butterflies are known to use heat from the sun to warm themselves beyon... | <urn:uuid:9a374252-df3c-4004-8693-6678182914d9> | 3.765625 | 355 | News Article | Science & Tech. | 45.392983 | 10 |
By Irene Klotz
CAPE CANAVERAL, Florida (Reuters) - Despite searing daytime temperatures, Mercury, the planet closest to the sun, has ice and frozen organic materials inside permanently shadowed craters in its north pole, NASA scientists said on Thursday.
Earth-based telescopes have been compiling evidence for ice on Me... | <urn:uuid:954bdf7e-7951-42c2-a6f6-6f7912bad693> | 3.234375 | 753 | News Article | Science & Tech. | 30.158056 | 11 |
Jim Lake and Maria Rivera, at the University of California-Los Angeles (UCLA), report their finding in the Sept. 9 issue of the journal Nature.
Scientists refer to both bacteria and Archaea as "prokaryotes"--a cell type that has no distinct nucleus to contain the genetic material, DNA, and few other specialized compone... | <urn:uuid:baf824b2-7e06-471a-8510-efd5abab1567> | 3.796875 | 335 | News Article | Science & Tech. | 30.012417 | 12 |
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 | 13 |
Attempts to relay mail by issuing a predefined combination of SMTP commands. The goal of this script is to tell if a SMTP server is vulnerable to mail relaying.
An SMTP server that works as an open relay, is a email server that does not verify if the user is authorised to send email from the specified email address. Th... | <urn:uuid:2fc62870-a21f-42bb-90f1-0b5d5c8d75a5> | 2.71875 | 483 | Documentation | Software Dev. | 63.215 | 14 |
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 | 15 |
Topics covered: Ideal solutions
Instructor/speaker: Moungi Bawendi, Keith Nelson
The following content is provided under a Creative Commons license. Your support will help MIT OpenCourseWare continue to offer high quality educational resources for free. To make a donation or view additional materials from hundreds of M... | <urn:uuid:246f9a12-fd35-40fa-8257-b07bf8d92857> | 3.921875 | 7,164 | Audio Transcript | Science & Tech. | 77.794819 | 16 |
We had a running joke in science ed that kids get so overexposed to discrepant events involving density and air pressure that they tend to try to explain anything and everything they don't understand with respect to science in terms of those two concepts. Why do we have seasons? Ummm... air pressure? Why did Dr. Smith ... | <urn:uuid:7eeb7ef3-3122-42f0-86c8-01da8f3d7396> | 3.1875 | 313 | Comment Section | Science & Tech. | 62.924413 | 17 |
|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 | 18 |
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 | 19 |
Major Section: BREAK-REWRITE
Example: (brr@ :target) ; the term being rewritten (brr@ :unify-subst) ; the unifying substitutionwhere
General Form: (brr@ :symbol)
:symbolis one of the following keywords. Those marked with
*probably require an implementor's knowledge of the system to use effectively. They are supported b... | <urn:uuid:460fe123-8906-4320-9cc8-f581b79ced1f> | 2.6875 | 976 | Documentation | Software Dev. | 47.978 | 20 |
May 16, 2011
If you fuel your truck with biodiesel made from palm oil grown on a patch of cleared rainforest, you could be putting into the atmosphere 10 times more greenhouse gasses than if you’d used conventional fossil fuels. It’s a scenario so ugly that, in its worst case, it makes even diesel created from coal (th... | <urn:uuid:15d19448-aa73-495a-802e-5b1e68a460f3> | 3.484375 | 253 | News Article | Science & Tech. | 46.947667 | 21 |
This work is licensed under the GPLv2 license. See License.txt for details
Autobuild imports, configures, builds and installs various kinds of software packages. It can be used in software development to make sure that nothing is broken in the build process of a set of packages, or can be used as an automated installat... | <urn:uuid:d4c570b0-6a4e-47fd-afe7-15b6daac7169> | 2.84375 | 144 | Documentation | Software Dev. | 27.461 | 22 |
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 | 23 |
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 | 24 |
The Gram-Schmidt Process
Now that we have a real or complex inner product, we have notions of length and angle. This lets us define what it means for a collection of vectors to be “orthonormal”: each pair of distinct vectors is perpendicular, and each vector has unit length. In formulas, we say that the collection is o... | <urn:uuid:4a2ad899-7ba0-4bfc-9276-c5c5c0845fe6> | 3.625 | 447 | Tutorial | Science & Tech. | 55.786307 | 25 |
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 | 26 |
Arctic meltdown not caused by nature
Rapid loss of Arctic sea ice - 80 per cent has disappeared since 1980 - is not caused by natural cycles such as changes in the Earth's orbit around the Sun, says Dr Karl.
The situation is getting rather messy with regard to the ice melting in the Arctic. Now the volume of the ice va... | <urn:uuid:3a4ac59c-d59d-470b-adad-88e5e1c8a45a> | 3.5625 | 1,065 | News Article | Science & Tech. | 65.159255 | 27 |
Black holes growing faster than expected
Black hole find Existing theories on the relationship between the size of a galaxy and its central black hole are wrong according to a new Australian study.
The discovery by Dr Nicholas Scott and Professor Alister Graham, from Melbourne's Swinburne University of Technology, foun... | <urn:uuid:e617c5fd-d556-4d43-be1f-042e7e7f2c60> | 4.25 | 552 | News Article | Science & Tech. | 38.051734 | 28 |
Hoodoos may be seismic gurus
Hoodoo prediction Towering chimney-like sedimentary rock spires known as hoodoos may provide an indication of an area's past earthquake activity.
The research by scientists including Dr Rasool Anooshehpoor, from the United States Nuclear Regulatory Commission, may provide scientists with a ... | <urn:uuid:85a979cb-9571-4e06-b38a-2f79912abb44> | 4.3125 | 644 | News Article | Science & Tech. | 37.919371 | 29 |
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 | 30 |
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 | 31 |
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 | 32 |
NOAA scientists agree the risks are high, but say Hansen overstates what science can really say for sure
Jim Hansen at the University of Colorado’s World Affairs Conference (Photo: Tom Yulsman)
Speaking to a packed auditorium at the University of Colorado’s World Affairs Conference on Thursday, NASA climatologist James... | <urn:uuid:f9441dcc-dc2a-4077-aac8-1b49394182e2> | 2.546875 | 1,273 | News Article | Science & Tech. | 58.102556 | 33 |
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 | 34 |
Download source - 8 Kb
This tutorial is based off of the MSDN Article #ID: Q194873. But, for a beginner, following these MSDN articles can be intimidating to say the least. One of the most often asked questions I see as a Visual C++ and Visual Basic programmer is how to call a VB DLL from VC++. Well, I am hoping to sho... | <urn:uuid:a5fbb498-1ce4-4861-9a4d-ac9d31394472> | 2.796875 | 2,064 | Tutorial | Software Dev. | 74.372644 | 35 |
Hold the salt: UCLA engineers develop revolutionary new desalination membrane
Process uses atmospheric pressure plasma to create filtering 'brush layer'
Desalination can become more economical and used as a viable alternate water resource.
By Wileen Wong Kromhout
Originally published in UCLA Newsroom
Researchers from t... | <urn:uuid:c0b175bb-65fb-420e-a881-a80b91d00ecd> | 2.8125 | 1,115 | News Article | Science & Tech. | 24.364388 | 36 |
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 | 37 |
In fact, the United States apparently just emerged from the hottest spring on record.
The period between June 2011 and May of this year was the warmest on record since NOAA record keeping began in 1985. Aside from Washington, every state experienced higher-than-average temperatures during that period, which also featur... | <urn:uuid:628e935a-7678-4d56-8179-04a384233ade> | 3.625 | 499 | News Article | Science & Tech. | 42.651575 | 38 |
|Scientific Name:||Phoebastria albatrus|
|Species Authority:||(Pallas, 1769)|
|Red List Category & Criteria:||Vulnerable D2 ver 3.1|
|Reviewer/s:||Butchart, S. & Taylor, J.|
|Contributor/s:||Balogh, G., Chan, S., Hasegawa, H., Peet, N., Rivera, K. & Suryan, R.|
This species is listed as Vulnerable because, although con... | <urn:uuid:573c77f2-d484-430d-94d7-05417faf55af> | 3.203125 | 2,094 | Knowledge Article | Science & Tech. | 46.976922 | 39 |
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 | 40 |
Ulva spp. on freshwater-influenced or unstable upper eulittoral rock
Ecological and functional relationships
The community predominantly consists of algae which cover the rock surface and creates a patchy canopy. In doing so, the algae provides an amenable habitat in an otherwise hostile environment, exploitable on a t... | <urn:uuid:13da434f-f140-49e3-8fdb-67019653693a> | 3.625 | 1,520 | Knowledge Article | Science & Tech. | 19.802367 | 41 |
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 | 42 |
You're using more water than you think
A water footprint is the total volume of freshwater used to produce the goods and services consumed. Here are some ways to lighten your water footprint.
Fri, Aug 31 2012 at 11:28 AM
Prodded by environmental consciousness — or penny pinching — you installed low-flow showerheads and... | <urn:uuid:cca5126a-d443-4b80-89a5-01bc0108a268> | 2.640625 | 660 | News Article | Science & Tech. | 54.947142 | 43 |
PHP, while originally designed and built to run on Unix, has had the ability since version 3 to run on Windows. That includes 9x, ME, NT, and 2000. In this article I'm going to go through the process of installing PHP on Windows and explain what you should look out for.
On Windows, as on Unix, you have two options for ... | <urn:uuid:26746c26-10ba-46d1-9738-1e79ec76d82b> | 2.609375 | 1,155 | Tutorial | Software Dev. | 75.591953 | 44 |
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 | 45 |
The process of accretion is important in the formation of planets, stars, and black holes; it is also believed to power some of the most energetic phenomena in the universe. In an accretion disc, the accretion rate is controlled by the outward transport of angular momentum. Collisional processes like friction or viscos... | <urn:uuid:9bf53c84-d3fd-428b-bc4b-63892ad85de5> | 2.625 | 215 | Academic Writing | Science & Tech. | 18.868453 | 46 |
Titan's Ethane Lake
This artist concept shows a mirror-smooth lake on the surface of the smoggy moon Titan.
Cassini scientists have concluded that at least one of the large lakes observed on Saturn's moon Titan contains liquid hydrocarbons, and have positively identified ethane. This result makes Titan the only place i... | <urn:uuid:36c0c102-e78a-494d-9b3b-78d6003c8994> | 3.34375 | 185 | Knowledge Article | Science & Tech. | 35.831515 | 47 |
Oct. 9, 1998 COLUMBIA, Mo.--Ducks, geese and bald eagles soaring over areas the size of small towns are envisioned when talking about federally protected wetlands, not areas that are maybe as big as a small swimming pool and apparently void of life. University of Missouri-Columbia Professor Ray Semlitsch is trying to c... | <urn:uuid:33275736-ac37-49fe-a13a-d130e6ad29c6> | 3.125 | 674 | Truncated | Science & Tech. | 33.419667 | 48 |
Nov. 27, 2009 Physicists from the Japanese-led multi-national T2K neutrino collaboration have just announced that over the weekend they detected the first neutrino events generated by their newly built neutrino beam at the J-PARC (Japan Proton Accelerator Research Complex) accelerator laboratory in Tokai, Japan.
Proton... | <urn:uuid:73f94bf7-72a9-431b-90ac-37db05302858> | 3.34375 | 1,033 | News Article | Science & Tech. | 22.25657 | 49 |
June 22, 2010 Millions of years before humans began battling it out over beachfront property, a similar phenomenon was unfolding in a diverse group of island lizards.
Often mistaken for chameleons or geckos, Anolis lizards fight fiercely for resources, responding to rivals by doing push-ups and puffing out their throat... | <urn:uuid:d0b67315-27de-4788-9b3c-46132eef151f> | 3.640625 | 791 | News Article | Science & Tech. | 36.878159 | 50 |
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 | 51 |
by I. Peterson
Unlike an ordinary, incandescent bulb, a laser produces light of a single wavelength. Moreover, the emitted light waves are coherent, meaning that all of the energy peaks and troughs are precisely in step.
Now, a team at the Massachusetts Institute of Technology has demonstrated experimentally that a clo... | <urn:uuid:5a667bf7-c324-483a-8231-ce8448d754f3> | 4 | 769 | News Article | Science & Tech. | 35.487766 | 52 |
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 | 53 |
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 | 54 |
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 | 55 |
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 | 56 |
SEA level rises and climate change are linked, say top scientists as they prepare the next major global climate change update.
More than 250 experts from 39 countries are in Hobart this week to review the latest draft of the Intergovernmental Panel on Climate Change's report including a new chapter on sea level.
The co... | <urn:uuid:4b0a824e-2759-4652-bb9b-cadd0312b57c> | 2.953125 | 420 | News Article | Science & Tech. | 55.436489 | 57 |
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 | 58 |
French and American scientists won the Nobel Prize in physics Tuesday for their work with light and matter, which may lead the way to superfast computers and "the most precise clocks ever seen," the prize committee said.
Serge Haroche of France and David Wineland of the United States will share the $1.2 million prize, ... | <urn:uuid:5652996e-b25f-42c5-9282-ece62c5dfdc1> | 2.59375 | 365 | News Article | Science & Tech. | 33.936457 | 59 |
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 | 60 |
Australian Museum Marine Invertebrate Collections
The Marine Invertebrate collection contains specimens from all invertebrate groups except molluscs, insects and spiders.
Crustaceans are animals that have:
- a segmented body with a hardened shell
- seven or more pairs of appendages for feeding, moving and reproduction
... | <urn:uuid:35678d88-fc35-4da5-83b8-3bf331289ba4> | 2.921875 | 446 | About (Org.) | Science & Tech. | -8.108485 | 61 |
Report Highlights Declining Health of Caribbean Corals
7 September 2012: A new International Union for Conservation of Nature (IUCN) report highlights that average live coral cover on Caribbean reefs has declined to just 8% of the reef today, compared with more than 50% in the 1970s. The report stems from a workshop he... | <urn:uuid:263ac1bf-33fa-4b18-8d48-715c94ebc9dd> | 3.515625 | 287 | News (Org.) | Science & Tech. | 24.193182 | 62 |
Combined Gas Law
The Combined Gas Law combines Charles Law, Boyle s Law and Gay Lussac s Law. The Combined Gas Law states that a gas pressure x volume x temperature = constant.
Alright. In class you should have learned about the three different gas laws. the first one being Boyle's law and it talks about the relationsh... | <urn:uuid:5f1963a4-8da7-4d73-9dda-3c8691608115> | 4.09375 | 873 | Tutorial | Science & Tech. | 76.50661 | 63 |
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 | 64 |
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 | 65 |
As a policy, Python doesn't run user-specified code on startup of Python programs. (Only interactive sessions execute the script specified in the PYTHONSTARTUP environment variable if it exists).
However, some programs or sites may find it convenient to allow users to have a standard customization file, which gets run ... | <urn:uuid:0d7a934e-59a5-4304-9f2f-f2ae12c2f02f> | 2.796875 | 469 | Documentation | Software Dev. | 46.007379 | 66 |
.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 | 67 |
Benefits of XQuery
The principal benefits of XQuery are:
- Expressiveness - XQuery can query many different data structures and its recursive nature makes it ideal for querying tree and graph structures
- Brevity - XQuery statements are shorter than similar SQL or XSLT programs
- Flexibility - XQuery can query both hie... | <urn:uuid:4e5da1e0-fbf3-4bf9-bfb9-40a6d6a93da8> | 2.75 | 1,630 | Knowledge Article | Software Dev. | 38.045051 | 68 |
In statistics, a confidence region is a multi-dimensional generalization of a confidence interval. It is a set of points in an n-dimensional space, often represented as an ellipsoid around a point which is an estimated solution to a problem, although other shapes can occur.
The confidence region is calculated in such a... | <urn:uuid:e4fbedec-4c46-43aa-b850-373a3030b4cf> | 3.59375 | 1,054 | Knowledge Article | Science & Tech. | 42.304445 | 69 |
Real form (Lie theory)
In mathematics, the notion of a real form relates objects defined over the field of real and complex numbers. A real Lie algebra g0 is called a real form of a complex Lie algebra g if g is the complexification of g0:
Real forms for Lie groups and algebraic groups
Using the Lie correspondence bet... | <urn:uuid:307c1388-d49d-46d7-a722-4f52f24df709> | 2.875 | 938 | Knowledge Article | Science & Tech. | 52.949664 | 70 |
Molecular Biology and Genetics
Statistics of barcoding coverage
|Specimen Records:||10||Public Records:||0|
|Specimens with Sequences:||8||Public Species:||0|
|Specimens with Barcodes:||0||Public BINs:||0|
|Species With Barcodes:||0|
Locations of barcode samples
The Geastrales are an order of gasterocarpic basidiomycet... | <urn:uuid:23dbc58d-5aa3-4282-819f-daadba5a08c9> | 2.796875 | 725 | Knowledge Article | Science & Tech. | 65.125014 | 71 |
there are several other differences
including different meaning for the symbols ( [
different rules for which symbols need escaping (they can't be the same as both standard posix and extended posix)
you should read the full documentation for PCRE before chaging any posix regex to use pcre.
Differences from POSIX regex
... | <urn:uuid:31708733-dbee-47f1-88c5-054e01a19ca2> | 2.5625 | 362 | Documentation | Software Dev. | 45.265829 | 72 |
Playing with Equations to Solve Problems
Date: 09/16/2003 at 10:48:13 From: Mara Subject: To state the geometric property of an equation I need to give the geometric property common to all lines in the family x - ky = 1 I know that the answer is that all lines in this family have an x-intercept at x=1 but I am totally ... | <urn:uuid:69dca799-4921-4967-8dea-92828ca59f08> | 2.546875 | 1,006 | Comment Section | Science & Tech. | 75.561952 | 73 |
Problem: An oil drilling rig located 14 miles off of a straight coastline is to be connected by a pipeline to a renery 10 miles down the coast from the point directly opposite the drilling rig. Laying pipe under water costs 500,000 dollars per mile. Laying pipe on land costs 300,000 dollars per mile. What combination o... | <urn:uuid:7821765f-cc32-4d66-bc92-9a0826f8b290> | 2.625 | 116 | Q&A Forum | Science & Tech. | 63.509412 | 74 |
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 | 75 |
News tagged with renewable energy
Related topics: energy , wind turbines , electricity , solar panels , fossil fuels
Renewable energy is energy generated from natural resources—such as sunlight, wind, rain, tides, and geothermal heat—which are renewable (naturally replenished). In 2006, about 18% of global final energy... | <urn:uuid:1408e655-896d-4edf-80ab-9e169370da2f> | 2.6875 | 452 | Knowledge Article | Science & Tech. | 23.335473 | 76 |
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 | 77 |
Like the Sound of Music‘s Von Trapp family hiding in the Alps, plants may find refuge from a warming climate in the mountains.
Research in the Swiss Alps suggests diverse mountain habitats could act as stepping stones to allow plants to escape into more hospitable hideaways as their usual homes heat up.
A large, flat s... | <urn:uuid:e12fbfc8-76ea-4109-8fcc-20b3e9f9c58f> | 4.21875 | 401 | News Article | Science & Tech. | 35.181071 | 78 |
- It is not possible to clone Lonesome George now, but other endangered animals have been successfully cloned.
- In the future, cloning and further studying Lonesome George might be possible, so scientists are focusing on preserving his tissues now.
- Biobanks known as "frozen zoos" hold tissues and other remains of ce... | <urn:uuid:c901aef6-8e50-46c9-81bb-1ba56593fbbb> | 3.296875 | 954 | News Article | Science & Tech. | 36.053291 | 79 |
for National Geographic News
Explosive population growth is driving human evolution to speed up around the world, according to a new study.
The pace of change accelerated about 40,000 years ago and then picked up even more with the advent of agriculture about 10,000 years ago, the study says.
And while humans are evolv... | <urn:uuid:faa2c08a-b40c-4dea-b8ca-9c8852139641> | 3.625 | 363 | News Article | Science & Tech. | 31.980927 | 80 |
Washington, Aug 9 (IANS) The formation in the air of sulphuric acid, which smells like rotten eggs, is significantly impacting our climate and health, says a study.
The study led by Roy Lee Mauldin III, research associate at the University of Colorado-Boulder's atmospheric and oceanic sciences department, charts a prev... | <urn:uuid:597b3d2d-8580-4486-a845-d0f996cf51af> | 3.390625 | 329 | News Article | Science & Tech. | 20.054193 | 81 |
Warmer temperatures, variable monsoons, and other signs of climate change are a hot topic of conversation among many Himalayan villagers, according to scientific sampling of climate change perception among local peoples.
“This area is cold and it’s often raining. Even during the non-monsoon times there is mist and fog ... | <urn:uuid:666a34c3-a3b0-48d9-822b-04ba99c0d218> | 3.15625 | 968 | News Article | Science & Tech. | 35.832289 | 82 |
The Solar and Heliospheric Observatory (SOHO) spacecraft is expected to discover its 1,000TH comet this summer.
The SOHO spacecraft is a joint effort between NASA and the European Space Agency. It has accounted for approximately one-half of all comet discoveries with computed orbits in the history of astronomy.
"Before... | <urn:uuid:78cbe1bd-1849-4138-b59a-5521e93122a3> | 4 | 663 | News Article | Science & Tech. | 48.522799 | 83 |
You have to break a few (hundred) eggs to make a good crystal
Space Science News home
You have to break a few (hundred) eggs to make a
good crystal Bell curve shape to crystal quality
may point to best candidates for flight
Sept. 20, 1999: Did you ever ask the teacher to grade a tough test "on the curve"? What you were... | <urn:uuid:2a7ca019-7b31-4e9b-8c46-9219b443a12f> | 3.09375 | 2,731 | News Article | Science & Tech. | 46.806197 | 84 |
How to do just that particularly in the Virgin Islands was on display Tuesday at Good Hope School as the St. Croix Environmental Association sponsored its second Environmental Science Career Expo in partnership with the V.I. Network of Environmental Educators.
The goal of the event was to enable middle school and high ... | <urn:uuid:856f7292-cbb4-4f99-891f-b70d8fb34f56> | 2.578125 | 828 | News Article | Science & Tech. | 49.777181 | 85 |
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 | 86 |
Elementary Matrices Generate the General Linear Group
Okay, so we can use elementary row operations to put any matrix into its (unique) reduced row echelon form. As we stated last time, this consists of building up a basis for the image of the transformation the matrix describes by walking through a basis for the domai... | <urn:uuid:cf863937-0ee5-440d-baec-55365a75d0fc> | 3.234375 | 345 | Tutorial | Science & Tech. | 34.446265 | 87 |
Coral reefs aren't just pretty, they're also vital to marine species and island communities. But they're also facing threats from warming seas. NBC's Anne Thompson reports.
More than half of 82 species of coral being evaluated for inclusion under the Endangered Species Act "more likely than not" would go extinct by 210... | <urn:uuid:341895fc-0dbb-4ebb-a24c-bce9caf290b6> | 3.703125 | 471 | News Article | Science & Tech. | 32.165294 | 88 |
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 | 89 |
Water creatures caught stealing DNA
Tiny freshwater organisms that have a sex-free lifestyle, may have survived so well because they steal genes from other creatures, US scientists report.
Researchers from the Harvard University in Cambridge, Massachusetts, have found genes from bacteria, fungi and even plants incorpor... | <urn:uuid:7ccc0e8f-b8e3-42aa-8ed8-47b14f3a075c> | 3.328125 | 498 | News Article | Science & Tech. | 28.540656 | 90 |
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 | 91 |
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 | 92 |
Taking a sample is just the beginning and preserving and processing specimens requires more than just the e-word.
Having completed eight dives, at least sixteen shore excursions, one nightlighting session, six trips to the fish markets, several roadside purchases and a surprise swim up to a fishing boat, the scientists... | <urn:uuid:81d6fb10-6b67-4af1-9eb5-b3504291e57d> | 2.828125 | 1,274 | News (Org.) | Science & Tech. | 42.172172 | 93 |
"We believe this is the first time bacterial horizontal gene transfer has been observed in eukaryotes at such scale," says senior author Igor Grigoriev of DOE JGI. "This study gets us closer to explaining the dramatic diversity across the genera of diatoms, morphologically, behaviorally, but we still haven't yet explai... | <urn:uuid:ea4e61f1-5a97-49dc-b206-0e94f7a4d478> | 3.78125 | 432 | News Article | Science & Tech. | 21.862894 | 94 |
The amount of nitrogen entering the Gulf each spring has increased about 300 percent since the 1960s, mainly due to increased agricultural runoff, Scavia said.
"Yes, the floodwaters really matter, but the fact that there's so much more nitrogen in the system now than there was back in the '60s is the real issue," he sa... | <urn:uuid:c11e46d4-b987-41e6-9352-3ac9cf25dde6> | 3.234375 | 370 | News (Org.) | Science & Tech. | 38.056826 | 95 |
First ever direct measurement of the Earth’s rotation
Geodesists are pinpointing the orientation of the Earth’s axis using the world’s most stable ring laser
A group with researchers at the Technical University of Munich (TUM) and the Federal Agency for Cartography and Geodesy (BKG) are the first to plot changes in the... | <urn:uuid:d4281798-7278-4727-a736-be4cecc072f8> | 3.921875 | 710 | News (Org.) | Science & Tech. | 40.519179 | 96 |
Computer Models How Buds Grow Into Leaves
Posted on March 02, 2012 at 08:24:51 am
"A bud does not grow in all directions at the same rate," said Samantha Fox from the John Innes Centre on Norwich Research Park. "Otherwise leaves would be domed like a bud, not flat with a pointed tip."
By creating a computer model to gr... | <urn:uuid:c1dfdc96-199a-4526-ae01-3ec1190ffbcd> | 3.609375 | 471 | News Article | Science & Tech. | 43.409487 | 97 |
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 | 98 |
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 | 99 |