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Radiation & fractionation
I have been reading up on radiation, but have some trouble fully understanding fractionation. Is there any simple approximation of the relation of fractionation and recovery, or some sort of adjusted effective dose?
A single continuous exposure of 1 Gy over 1 hour, compared to 20 acute doses o... | <urn:uuid:fc9ecbc3-dc48-43b3-bb27-c79c4c9ad985> | 2.734375 | 231 | Comment Section | Science & Tech. | 42.223781 | 1,400 |
Dec. 19, 2012 An international team of astronomers led by the University of Hertfordshire has discovered that Tau Ceti, one of the closest and most Sun-like stars, may host five planets -- with one in the star's habitable zone.
At a distance of twelve light years and visible with the naked eye in the evening sky, Tau C... | <urn:uuid:df06c3f5-ca01-43c1-8ca4-d3dbdc1cbea0> | 3.296875 | 851 | News (Org.) | Science & Tech. | 55.479163 | 1,401 |
Feb. 19, 2013 Species facing widespread and rapid environmental changes can sometimes evolve quickly enough to dodge the extinction bullet. Populations of disease-causing bacteria evolve, for example, as doctors flood their "environment," the human body, with antibiotics. Insects, animals and plants can make evolutiona... | <urn:uuid:612602ab-d4d1-400b-96b5-d233d34a7c6e> | 3.984375 | 902 | News Article | Science & Tech. | 25.16925 | 1,402 |
View Full Version : What's the difference between model and store?
1 Sep 2012, 7:06 PM
I'm new to ExtJS. I wonder what the difference between model and store is.
When to use model, and when to use store?
I thought the model is the schema, and the store is the data itself.
But it seems not a right concept...
Using SQL t... | <urn:uuid:2993e3b4-c890-4e90-96f4-b74aea2a658e> | 2.671875 | 348 | Comment Section | Software Dev. | 72.806242 | 1,403 |
People got very excited in 2004 when NASA’s rover Opportunity discovered evidence that Mars had once been wet. Where there is water, there may be life. After more than 40 years of human exploration, culminating in the ongoing Mars Exploration Rover mission, scientists are planning still more missions to study the plane... | <urn:uuid:981101dc-8a3c-41d3-acb1-f805ca121c91> | 3.59375 | 772 | Nonfiction Writing | Science & Tech. | 38.62754 | 1,404 |
On September 6, 2009, the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) instrument on NASA’s Terra satellite captured this simulated natural color image of the Station fire, burning in the San Gabriel Mountains north of Los Angeles. The fire started on August 26 in La Canada/Flintridge near NAS... | <urn:uuid:2f10e655-e9c5-4df4-9ab6-1a886886d0b9> | 3.9375 | 424 | Truncated | Science & Tech. | 31.775695 | 1,405 |
UCL’s Institute of Origins was created to promote world-leading research into the Origins and Evolution of the Universe, the basis of life and how we came to exist.
The Institute aims to bring together under one umbrella the rich and highly respected multi-disciplinary expertise that UCL has built up over several decad... | <urn:uuid:fb026668-1919-46b8-b9a7-5c9a7648f14e> | 2.71875 | 212 | About (Org.) | Science & Tech. | 24.582656 | 1,406 |
DEERFIELD, Ill., Jan. 7 (UPI) -- An early ancestor of today's birds had teeth -- and not just any teeth, but ones evolved for a special diet, U.S. paleontologists say.
Writing in the Journal of Vertebrate Paleontology, researchers say a study of a species of early bird, Sulcavis geeorum, suggests it had a durophagous d... | <urn:uuid:c410bdf5-db8b-4807-b795-0c7ca3023339> | 3.84375 | 315 | News Article | Science & Tech. | 42.301806 | 1,407 |
More About Ellipses
Steven Dutch, Natural and Applied Sciences,
University of Wisconsin - Green Bay
First-time Visitors: Please visit Site Map and Disclaimer. Use
"Back" to return here.
Find the Center of an Ellipse
Sometimes you have an ellipse but don't know the center. Finding the
center is easy.
- Draw two arbitrar... | <urn:uuid:f07108cc-2222-4284-a944-4269d648096b> | 3.859375 | 439 | Tutorial | Science & Tech. | 48.585211 | 1,408 |
Image of the solar corona in white light (outer circle, blue and white) and X-Rays (inner circle, red, yellow, and black) on April 22, 1994, courtesy of the High Altitude Observatory and the Yohkoh Science team. The dashed circle is the solar radius.
Click on image for full size
Image courtesy of the High Altitude Obse... | <urn:uuid:e37ed691-3761-4a9c-a88b-41b6a93f18f1> | 3.71875 | 765 | Knowledge Article | Science & Tech. | 54.788677 | 1,409 |
A baseball speeds from the hands of a pitcher, a slave to Newton’s laws. But in the brain of the batter who is watching it, something odd happens. Time seems to dawdle. The ball moves in slow motion, and becomes clearer. Players of baseball, tennis and other ball sports have described this dilation of time. But why doe... | <urn:uuid:5db5cf11-115e-49eb-aa80-55ef0dca96ad> | 3.3125 | 1,364 | Nonfiction Writing | Science & Tech. | 58.192157 | 1,410 |
Because is only 0.7 percent of naturally occurring uranium, its supply is fairly limited and could well only last for about 50 years of full-scale use. The other 99 percent of the uranium can also be utilized if it is first converted into plutonium by neutron bombardment:
The production of plutonium can be carried out ... | <urn:uuid:81fa5386-755b-45d4-a2c0-8d9005faa120> | 3.40625 | 375 | Knowledge Article | Science & Tech. | 35.239351 | 1,411 |
Our knowledge concerning the surface of Venus comes from a limited amount of information obtained by the series of Russian Venera landers, and primarily from extensive radar imaging of the planet. The radar imaging of the planet has been performed both from Earth-based facilities and from space probes. The most extensi... | <urn:uuid:98f84e8a-c73e-4cf2-9c53-4b613f94b23a> | 4.34375 | 622 | Knowledge Article | Science & Tech. | 38.611933 | 1,412 |
A link from one of readers (thanks Ashley!) pointed us to a story on MSNBC about a very large Lion’s Mane jellyfish (Cyanea capillata) that broke apart and stung up to 100 people on a New Hampshire beach last Wednesday. Lion’s Manes can get very big, their bell can be over 3 feet. Their tentacles though are another sto... | <urn:uuid:f918762f-3b67-4ad1-afde-567aa6fdb2e8> | 2.921875 | 863 | Comment Section | Science & Tech. | 63.064304 | 1,413 |
Inheritance describes a relationship between two (or more) types, or classes, of objects in which one is said to be a "subtype" or "child" of the other, as result the "child" object is said to inherit features of the parent, allowing for shared functionality, this lets programmers re-use or reduce code and simplifies t... | <urn:uuid:9a20ccee-39d2-4e2e-b39d-d7f4cb702252> | 4.25 | 414 | Knowledge Article | Software Dev. | 19.043377 | 1,414 |
The standard 'Scientific
' explanation is that the carbon-carbon bond
s in diamond are too stable, no enzyme
would be able to overcome the energy barrier
necessary to disassemble diamond.
However, diamond is something of a special case for carbon compounds (oh, fullerenes are probably pretty inedible). There are organi... | <urn:uuid:38c25a29-31f8-41e3-857d-ec29ed46d1b5> | 2.9375 | 165 | Personal Blog | Science & Tech. | 36.135085 | 1,415 |
Cnidarians are water animals that have a simple, usually symmetrical, body with a mouth opening. Stinging cells on tentacles around the mouth catch prey. Cnidarians are either bell-shaped and mobile, like the jellyfish, or tubes anchored to one spot, like coral and sea anemones.
All cnidarians have stinging cells. Many... | <urn:uuid:0caaa280-9d5d-4b44-89b2-45bd84ce8936> | 3.3125 | 157 | Knowledge Article | Science & Tech. | 30.819648 | 1,416 |
If you guys remember all of the big genome sequencing projects of the 90s and the early aughts, they’ve been continuing and the amount of raw data they have been giving back to us has exponentially accelerated. However, those of us trying to understand the biological realities of what all of those sequences actually me... | <urn:uuid:3ef7c364-d1af-4794-b165-540dfb009e63> | 2.796875 | 2,487 | Personal Blog | Science & Tech. | 30.832799 | 1,417 |
I'm having some trouble with this proof problem. Anyone have any ideas?
"Let p be an integer other than 0, +/- 1 with this property: Whenever b and c are integers such that p | bc, then p | b or p | c. Prove p is prime. [Hint: If d is a divisor of p, say p = dt, then p | d or p | t. Show that this implies d = +/- p or ... | <urn:uuid:4114dfd8-6d08-4852-bdb4-110a13ddac77> | 2.515625 | 210 | Q&A Forum | Science & Tech. | 103.764338 | 1,418 |
Does anybody know if there exists a mathematical explanation of Mendeleev table in quantum mechanics? In some textbooks (for example in "F.A.Berezin, M.A.Shubin. The Schrödinger Equation") the authors present quantum mechanics as an axiomatic system, so one could expect that there is a deduction from the axioms to the ... | <urn:uuid:1230a7ba-990c-4eb8-93aa-d197d538f189> | 2.59375 | 657 | Q&A Forum | Science & Tech. | 50.086388 | 1,419 |
Claessens has discovered that the kauri trees in New Zealand prevent landslides. When these enormous conifers reached a certain age, they stabilise areas prone to landslides. This maximises the benefit the trees gain by living far longer than other tree species.
At present the slopes are drained and large concrete stru... | <urn:uuid:64d141aa-b3bb-4700-98f9-eb42b659c1b1> | 4.09375 | 368 | News Article | Science & Tech. | 45.611635 | 1,420 |
CORVALLIS, Ore. – The ebb and flow of the ocean tides, generally thought to be one of the most predictable forces on Earth, are actually quite variable over long time periods, in ways that have not been adequately accounted for in most evaluations of prehistoric sea level changes.
Due to phenomena such as ice ages, pla... | <urn:uuid:92cfa7a8-c4ac-4f98-b4e6-fd5945c40921> | 4.03125 | 760 | News Article | Science & Tech. | 43.625787 | 1,421 |
In the face of a changing climate many species must adapt or perish. Ecologists studying evolutionary responses to climate change forecast that cold-blooded tropical species are not as vulnerable to extinction as previously thought. The study, published in the British Ecological Society's Functional Ecology, considers ... | <urn:uuid:c69fa6c9-99d5-4af0-93a9-fbcd9c36f1c7> | 3.875 | 601 | News Article | Science & Tech. | 19.311766 | 1,422 |
Orthogonal Complements and the Lattice of Subspaces
We know that the poset of subspaces of a vector space is a lattice. Now we can define complementary subspaces in a way that doesn’t depend on any choice of basis at all. So what does this look like in terms of the lattice?
First off, remember that the “meet” of two su... | <urn:uuid:b195ff4f-68c6-4b12-b7cc-e9f02fce6c71> | 2.875 | 507 | Personal Blog | Science & Tech. | 58.036136 | 1,423 |
A Guest Post by Basil Copeland
Like many of Anthony’s readers here on WUWT, I’ve been riveted by all the revelations and ongoing discussion and analysis of the CRUtape Letters™ (with appropriate props to WUWT’s “ctm”). It might be hard to imagine that anyone could add to what has already been said, but I am going to tr... | <urn:uuid:24d44c19-90b4-46bb-b61f-344b51a9bdc3> | 2.5625 | 1,740 | Personal Blog | Science & Tech. | 41.56506 | 1,424 |
Scientific American published an article summarizing what I’ve written about for a couple of years: the IPCC’s projections aren’t 100% correct. Gasp – the horror! But, contrary to what skeptics think, the direction the IPCC’s reports were wrong are opposite of what they claim. The projections time and again underestima... | <urn:uuid:05b24e17-d7d4-4e56-baaf-4644f0253fbf> | 2.8125 | 1,535 | Personal Blog | Science & Tech. | 54.107649 | 1,425 |
Marc Buie of the Lowell Observatory describes observations of Pluto in 1996 and their comparison with the 1994 observations that were reported in a 1996 press release. They showed structure on Pluto's surface. He has also compiled a list of "good Pluto WWW Pages," assigning grades of A+ to C for them.
JPL continues to ... | <urn:uuid:50e9f3b6-a817-42e1-b7c1-88d70e105e66> | 3.109375 | 609 | Knowledge Article | Science & Tech. | 46.01259 | 1,426 |
Search the Archives
Latest News in Science: August 1998
- No stories published
- Genes - the 'book' of life?
- Space policy small step for Australia
- Hunting for the real 'Planet X'
- Earthquake scientists' trial splits experts
- Australia pushes for Antarctic protection
Wednesday, 15 May 2013
Record-setting gamma-ray... | <urn:uuid:9f02bbf4-72c2-4f60-93b3-476b8a84bf6e> | 2.578125 | 109 | Content Listing | Science & Tech. | 51.13658 | 1,427 |
Science subject and location tags
Articles, documents and multimedia from ABC Science
Thursday, 16 December 2010
StarStuff Podcast After a 33-year odyssey, NASA's Voyager 1 spacecraft reaches the very edge of our solar system. Plus: new theory explains rings and ice moons of Saturn; mysterious carbon-rich planet raises... | <urn:uuid:e4fac495-a61c-4e9f-95b0-b3f65fb09b40> | 2.875 | 527 | Content Listing | Science & Tech. | 74.886751 | 1,428 |
C++ is an object-oriented enhancement of the C programming language and is becoming the language of choice for serious software development.
C++ has crossed the Single Book Complexity Barrier. The individual features are not all that complex, but when put together in a program they interact in highly non-intuitive ways... | <urn:uuid:4db01cfa-2e93-426c-92cc-863dea62f75a> | 3.203125 | 655 | Product Page | Software Dev. | 55.733875 | 1,429 |
History and Acknowledgements
Smart pointers are objects which store pointers to dynamically allocated (heap) objects. They behave much like built-in C++ pointers except that they automatically delete the object pointed to at the appropriate time. Smart pointers are particularly useful in the face of exceptions as they ... | <urn:uuid:9c21b6f0-26b8-4faf-92b6-5f9ffbfec117> | 3.125 | 1,656 | Documentation | Software Dev. | 37.630115 | 1,430 |
Cities Across U.S. Bore Brunt of Record-Setting July Heat
Preliminary climate data for July shows that many cities across the U.S. experienced record-setting months, with temperatures propelled upwards by a massive area of High Pressure, more popularly known as a Heat Dome, that kept cooling rains at bay.
For example, ... | <urn:uuid:966425a8-c469-403f-aef4-d2194614a667> | 3.046875 | 946 | News Article | Science & Tech. | 62.266865 | 1,431 |
NSMC carries out activities of theoretical and experimental researches on radiation transmission in the atmosphere, the algorithm for meteorological satellite data processing as well as the application of meteorological satellite data. These researches have in turn supported the development of NSMC, promoted the meteor... | <urn:uuid:30215c53-89c1-4d2e-b659-786f3a8b1197> | 2.546875 | 321 | About (Org.) | Science & Tech. | -0.211302 | 1,432 |
Virtual file system Part 1
Virtual File System is an interface providing a clearly defined link between the operating system kernel and the different File Systems. The VFS supplies the applications with the system calls for file management (like “open”, “read”, “write” etc.), maintains internal data structures (the adm... | <urn:uuid:cdb2f748-eadb-46e4-a8f9-7ce30a54c3bf> | 3.640625 | 521 | Documentation | Software Dev. | 34.966883 | 1,433 |
Mission: To observe, understand and model the hydrological cycle and energy fluxes in the Earth's atmosphere and at the surface.
The Global Energy and Water Cycle Exchanges Project (GEWEX) is an integrated
program of research, observations, and science activities that focuses on the atmospheric, terestrial, radiative, ... | <urn:uuid:9129ea87-1caf-48d4-8149-fa90e6c2d22a> | 2.703125 | 972 | About (Org.) | Science & Tech. | -3.076509 | 1,434 |
Every user who can log in on the system is identified by a unique number called the user ID. Each process has an effective user ID which says which user's access permissions it has.
Users are classified into groups for access control purposes. Each process has one or more group ID values which say which groups the proc... | <urn:uuid:0212885e-c820-4537-b9f2-f8f7408a1bff> | 2.734375 | 193 | Documentation | Software Dev. | 49.293339 | 1,435 |
Windhunter is a project for hydrogen mass production based on electrolysis of the sea water. It consists of a platform that sustains some wind mills. They produce electricity following that electricity produces hydrogen and oxygen through the well-known electrolysis process. The wind turbines have a power of 2 MegaWatt... | <urn:uuid:39ff2758-2756-4c33-9f37-2d10bc44b36a> | 3.234375 | 422 | Personal Blog | Science & Tech. | 47.978125 | 1,436 |
Grassland in Mabi County destroyed by glacial lake outburst flood (GLOF). This area used to be farmland, now it's covered with black glacial deposits after the glacial lake burst. Global warming causes Himalayan glaciers to melt at an unprecedented rate, making GLOF more frequent. Latest research (2009) indicates that ... | <urn:uuid:925035c8-4b10-42e8-90d0-bcef592b3b78> | 2.515625 | 100 | Knowledge Article | Science & Tech. | 47.438581 | 1,437 |
Despite La Nina, US sets 4 Major Heat Records in First Half of 2012
Warmest U.S. Spring On Record: NOAA
Planetark.org, June 8, 2012
So far, 2012 has been the warmest year the United States has ever seen, with the warmest spring and the second-warmest May since record-keeping began in 1895, the U.S. National Oceanic and... | <urn:uuid:ac9f73cf-af29-40e8-9096-f9ea9a0587b5> | 2.65625 | 1,593 | News Article | Science & Tech. | 54.518061 | 1,438 |
Get those emergency supplies ready. Caltech scientists working with the United States Geological Survey have modeled the next big quake based on last week’s temblor in China. Here’s their scenario for a 7.8 magnitude event along the San Andreas fault in Southern California:
_10 a.m.: The San Andreas Fault ruptures, sen... | <urn:uuid:c22918ac-1344-4a8e-9c6e-fbf251f665d0> | 3.203125 | 305 | News Article | Science & Tech. | 51.428684 | 1,439 |
August 01, 2011
When it comes to magnetic fields, Jupiter is the ultimate muscle car. It's endowed with the biggest, brawniest magnetic field of any planet in the solar system, powered by a monster engine under the hood.
Figuring out how this mighty engine, or dynamo, works is one goal of NASA's Juno mission, which is ... | <urn:uuid:9f80eb67-ffb9-4c25-920b-1d915a2060c6> | 3.375 | 267 | News (Org.) | Science & Tech. | 51.076635 | 1,440 |
plant or animal
person, or thing adopted by a group as a representative symbol
terrestrial - living
on or in the ground; not aquatic
- any fresh, marine, or terrestrial crustacean of the order isopoda,
having seven pairs of legs adapted for crawling and has a flattened body
- any marine
or fresh water crustaceans of th... | <urn:uuid:a5306186-9187-4558-b76c-34322653b694> | 3.65625 | 575 | Knowledge Article | Science & Tech. | 40.389309 | 1,441 |
Hi....to my understanding.... nanoscale Au can be produced by various techniques...to name a few VCLDI, EEW, Chemical route, phyiscal methods etc.... all these techniques doesnt yield nanoparticles of same size, shape, purity etc.... generally depending on the applications the synthesizing techniques is chosen...and ea... | <urn:uuid:2722132e-b1f0-443b-8f13-44c243d6f029> | 2.5625 | 451 | Comment Section | Science & Tech. | 54.68641 | 1,442 |
An ultra-fast U.S. military drone that streaked across the sky at 13,000 mph and met its demise in the Pacific was doomed by the excessive heat of hypersonic travel, which literally peeled away the drone's metal skin, military officials have revealed.
A seven-month study by the military's Defense Advanced Research Proj... | <urn:uuid:649e0599-ed8a-4cdb-9278-05ba2dc596cd> | 2.65625 | 851 | News Article | Science & Tech. | 46.41459 | 1,443 |
LONG BEACH, Calif. — NASA's 23-year-old Hubble Space Telescope is still going strong, and agency officials said Tuesday they plan to operate it until its instruments finally give out, potentially for another six years at least.
After its final overhaul in 2009, the Hubble telescope was expected to last until at least 2... | <urn:uuid:5ef8910d-72cc-4fea-aa0a-5e7603c5a50c> | 2.609375 | 699 | News Article | Science & Tech. | 49.407688 | 1,444 |
RNA ligation - (Dec/03/2001 )
I'm not sure if you can do single stranded RNA ligation, but I have another idea. What if you did first strand synthesis on the RNA. Then, do a second strand synthesis (protocol in maniatis or current protocols). Next, blunt the ends of the double stranded cDNA you produced (just to be sur... | <urn:uuid:d5641108-618f-4931-af04-15377d81bf44> | 2.515625 | 394 | Comment Section | Science & Tech. | 62.964286 | 1,445 |
The Reptiles of Nauru1
By Buden, Donald W
Abstract: Eleven species of reptiles are reported from Nauru in the first systematic treatment of the herpetofauna. Four of the species are marine; the seven others include six lizards (four geckos, two skinks) and one snake. Gehyra mutilata (Wiegman), G. oceanica (Lesson), Pel... | <urn:uuid:29df1b53-2764-4eba-875c-2201e5a5ee38> | 2.921875 | 6,887 | Academic Writing | Science & Tech. | 53.139692 | 1,446 |
Ponder this ‘strange telescope’ buried deep at the South PoleFindings from extraordinary scientific research in the heart of Antarctica -- the IceCube Neutrino Observatory -- that includes a UW-River Falls connection will be presented on campus and at a Main Street café the week of Nov. 26-Dec. 1.
By: Phil Pfuehler, Ri... | <urn:uuid:c510ed8c-5b39-4e00-b015-651825a370c8> | 3.3125 | 729 | News Article | Science & Tech. | 55.044339 | 1,447 |
May 1, 2012 On 5 and 6 June this year, millions of people around the world will be able to see Venus pass across the face of the Sun in what will be a once-in-a-lifetime experience.
It will take Venus about six hours to complete its transit, appearing as a small black dot on the Sun's surface, in an event that will not... | <urn:uuid:8ed69503-90e8-44b7-84f0-994f63ec80c4> | 3.859375 | 862 | Truncated | Science & Tech. | 51.800161 | 1,448 |
How are chromosomes ‘painted’?
Your 23 pairs of chromosomes contain around 24,000 pairs of genes. FISH – fluorescent in situ hybridisation – can be used to ‘paint’ chromosomes. Scientists prepare chromosomes on a microscope slide, tag a copy of the gene they want to find with a fluorescing dye and add it to the slide. ... | <urn:uuid:b546ae24-1f75-4d79-95b6-a723c2028e5a> | 3.390625 | 95 | Knowledge Article | Science & Tech. | 51.819183 | 1,449 |
Optical image of the central HH1-2 region (colors) with a superposition (contours) of the IR emission detected with the LW2 filter of ISOCAM. The positions of the VLA1 & 2 &4 sources are indicated by white filled circles. The position towards which we have discovered the three infrared windows is indicated by a black f... | <urn:uuid:608205c8-1ba4-4119-9720-b4a3604be342> | 2.96875 | 907 | News Article | Science & Tech. | 34.990452 | 1,450 |
The people in south Asia had no warning of the next disaster rushing toward them the morning of December 26, 2004. One of the strongest earthquakes in the past 100 years had just destroyed villages on the island of Sumatra in the Indian Ocean, leaving many people injured. But the worst was yet to come—and very soon. Fo... | <urn:uuid:db2613b9-457b-405c-a9e8-cf6b3053cdc7> | 4.6875 | 607 | Knowledge Article | Science & Tech. | 59.732901 | 1,451 |
Now poor moose are being blamed for global warming.
Norwegian newspapers, citing research from Norway's technical university, said a motorist would have to drive 13,000 kilometers in a car to emit as much CO2 as a moose does in a year.
Bacteria in a moose's stomach create methane gas which is considered even more destr... | <urn:uuid:9d981d31-c6bb-4952-be20-a74847ac04c7> | 2.96875 | 192 | News Article | Science & Tech. | 42.552467 | 1,452 |
Data reported by the weather station: 552790
Latitude: 31.36 | Longitude: 90.01 | Altitude: 4701
|Main||Year 1996 climate||Select a month|
To calculate annual averages, we analyzed data of 363 days (99.18% of year).
If in the average or annual total of some data is missing information of 10 or more days, this is not di... | <urn:uuid:c3fcc140-bd36-4673-9094-086cde8921c2> | 2.5625 | 356 | Structured Data | Science & Tech. | 72.329555 | 1,453 |
Want to stay on top of all the space news? Follow @universetoday on Twitter
The average Earth surface temperature is 14° C. That’s 287 kelvin, or 57.2° F.
As you probably realize, that number is just an average. The Earth’s temperature can be much higher or lower than this temperature. In the hottest places of the plan... | <urn:uuid:86d90c21-1f3c-4921-a8db-cbd4b6a112ed> | 3.625 | 204 | Knowledge Article | Science & Tech. | 69.944741 | 1,454 |
Science Fair Project Encyclopedia
- Green algae
- land plants (embryophytes)
- non-vascular embryophytes
- vascular plants (tracheophytes)
- seedless vascular plants
- seed plants (spermatophytes)
Plants are a major group of living things (about 300,000 species), including familiar organisms such as trees, flowers, her... | <urn:uuid:b8724c44-5980-4235-935c-5f06d06d99e8> | 3.90625 | 2,280 | Knowledge Article | Science & Tech. | 32.690165 | 1,455 |
An international team of researchers led by Masamune Oguri at Kavli IPMU and Naohisa Inada at Nara National College of Technology conduced an unprecedented survey of gravitationally lensed quasars, and used it to measure the expansion history of the universe. The result provides strong evidence that the expansion of th... | <urn:uuid:56de895f-8137-4398-a92a-f6af711947c1> | 2.625 | 1,853 | Content Listing | Science & Tech. | 40.172503 | 1,456 |
Biodiversity Heritage Library
Browse Our Collection by:
Subject "Burrowing animals"
The importance of catfish burrows in maintaining fish populations of tropical freshwater streams in western Ecuador / Garrett S. Glodek.
By: Glodek, Garrett S.
Publication info: [Chicago] :Field Museum of Natural History,1978.
Contribut... | <urn:uuid:75794740-80ea-4434-8ce1-b3d2ef563163> | 3.1875 | 111 | Content Listing | Science & Tech. | 0.245 | 1,457 |
Google is now serving up more than a hundred years of photographs from Life Magazine. The pictures of the early days of astronomy are just spectacular. The archives contain images of many astronomers who were critical figures in the development of the field, but who have yet to have telescopes named after them. A large... | <urn:uuid:0146518b-5d1e-4ea6-8a34-c54f34f6df6f> | 3.234375 | 454 | Personal Blog | Science & Tech. | 42.923767 | 1,458 |
June 11, 2010
Dead birds smothered in icky, gooey brown oil are the iconic images of most any oil spill, including the ongoing one in the Gulf. Even a small amount of oil can kill a bird. Oil sticks to feathers, destroying their waterproofing ability and exposing the bird to extremes of temperature. And ingested oil ca... | <urn:uuid:2d3b0c34-2324-48d2-bef4-a03870a0a5ee> | 3.1875 | 643 | News Article | Science & Tech. | 60.058439 | 1,459 |
Two stories appeared this week with more bad news on climate change. First, a review of 866 papers found that animal and plant species are shifting their ranges northward, while polar species are dying out.
The linked article from the Post included several paragraphs on the economic implications, in this case ski resor... | <urn:uuid:577bcf3c-8dec-4793-b0aa-101996281e00> | 2.6875 | 454 | Personal Blog | Science & Tech. | 48.678987 | 1,460 |
NASA began observing a dust storm on the planet Mars on November 10, 2012. Martian dust storms are the largest such storms in our solar system. Over the century that astronomers have monitored them through telescopes – and now via spacecraft – these periodic storms have been know to rage for months and grow to cover th... | <urn:uuid:79cd84c3-9aea-4123-a05f-43931a24850e> | 4.15625 | 697 | Knowledge Article | Science & Tech. | 50.284294 | 1,461 |
Photograph by Donna Eaton
A hippo peers from a plant-covered pool in Kenya’s Masai Mara Game Reserve. These massive mammals keep cool by submerging their massive bodies in African ponds, rivers, and lakes for up to 16 hours a day. Though they can hold their breath for perhaps half an hour if necessary, hippos typically... | <urn:uuid:a6832002-e376-4f5b-9983-6d46b680d43d> | 3.3125 | 1,726 | Content Listing | Science & Tech. | 44.465734 | 1,462 |
The idea of the hypernova was first proposed by Dr. Bohdan Paczynski of Princeton University
. He wanted to explain the gamma ray burst
s that typically last a few second
s at a time, come from seemingly random
directions in space, and have the potential to produce more energy than anything else in the rest of the univ... | <urn:uuid:db36eb8c-30a7-4887-a53e-acb1c1b6fe92> | 3.765625 | 646 | Personal Blog | Science & Tech. | 48.413299 | 1,463 |
Seeing red, or green - chemistry of color vision
Dr. Ali Zand is researching the chemistry underlying our ability to perceive colors and its implications on color blindness.
At first glance, Dr. Ali Zand's research on the chemistry of color vision defies the very foundation of the art world, where red, blue and yellow ... | <urn:uuid:1749083a-ee86-46b5-88d3-d8b21f899fc9> | 3.828125 | 1,642 | News Article | Science & Tech. | 40.125325 | 1,464 |
10 Truly Eccentric Organisms
Most species of organisms are unrecognized for their unique, versatile abilities, appearance and existence. When we think of organisms we often think of the typical dog, cat and other household pets. When we think of wild organisms, we think of zebras, lions, monkeys and other animals seen ... | <urn:uuid:cf9df807-7844-4705-8359-13855377443c> | 3.21875 | 1,363 | Listicle | Science & Tech. | 52.344073 | 1,465 |
A thermally insulated piston cylinder device initially contains 0.2m^3, 0.8kg of air at 20 degrees Celcius, and the piston is free to move. Now air at 600kPa and 80 degrees Celcius is slowly applied to the device through a supply line until the volume increases by 50 percent. Using constant specific heats and assume ai... | <urn:uuid:ce6c3cc4-87f1-4a5f-8818-9f9cab8a03be> | 2.90625 | 105 | Q&A Forum | Science & Tech. | 62.546395 | 1,466 |
[Numpy-discussion] "Nyquist frequency" in numpy.fft docstring
Sun Jul 11 18:13:44 CDT 2010
Hi! I'm a little confused: in the docstring for numpy.fft we find the
"For an even number of input points, A[n/2] represents both positive and
negative Nyquist frequency..."
but according to http://en.wikipedia.org/wiki/Nyquist_f... | <urn:uuid:c6e88302-6165-4cb7-bee3-07f7c0a9cf58> | 2.875 | 356 | Comment Section | Software Dev. | 65.777796 | 1,467 |
Date: 9/2/96 at 22:52:58 From: Mohd Nasir Mahmud Subject: Radians Dear Sir, Could you tell me why pi radians = 180 degrees?
Date: 10/24/96 at 16:5:50 From: Doctor Jaime Subject: Radians This is an immediate consequence of the definition of radians and degrees. In fact 1 radian is defined as the central angle subtended ... | <urn:uuid:c7c74107-6861-40a6-9c3c-93a2761bcd3c> | 3.59375 | 218 | Comment Section | Science & Tech. | 82.960921 | 1,468 |
A Villager David has a plot of land of the shape of a quadrilateral. The Village head decided to take over some portion of his plot from one of the corners toconstruct a health center. Suzie Agrees to the above proposal with the condition that he should be given equal amount of land in lieu of his land adjoining his pl... | <urn:uuid:11dedc48-f881-412e-8b75-2d141c022009> | 3.296875 | 89 | Q&A Forum | Science & Tech. | 56.888654 | 1,469 |
AB and AC are equal chords of a circle. AM and BN are parallel chords through A and B respectively. Prove that AN is parallel to CM.
I've tried to prove angles NAM and AMC are equal but failed miserably. Could someone please help me with this question? | <urn:uuid:570c0734-cb33-4251-ba58-2b155f18c6cd> | 2.53125 | 59 | Q&A Forum | Science & Tech. | 74.304327 | 1,470 |
Application Configuration Files
Application configuration files contain settings specific to an application. This file contains configuration settings that the common language runtime reads (such as assembly binding policy, remoting objects, and so on), and settings that the application can read.
The name and location ... | <urn:uuid:fd003215-f710-461c-8456-94260ff34ad8> | 2.875 | 288 | Documentation | Software Dev. | 25.886154 | 1,471 |
4.2. Protoplanetary disks
Contrary perhaps to the expectation that protoplanetary disks would be deeply embedded within the clouds from which they form, and they would therefore be inaccessible to optical observations, HST revealed many dozens of protoplanetary disks ("proplyds"; e.g., Bally, O'Dell and McCaughrean 200... | <urn:uuid:fb27e39a-1e34-46c6-b680-951f862a36ce> | 3.90625 | 882 | Academic Writing | Science & Tech. | 54.068308 | 1,472 |
From my research in Hungary, one of the key things that has struck me is the way in which multiple representations and images are used to support the development of very abstract and complex mathematical ideas. This month's website will seek to illustrate this and offer some problems and resources that help students to... | <urn:uuid:5a006efa-e28c-4029-afb8-4d9be87d37ca> | 3.640625 | 1,294 | Academic Writing | Science & Tech. | 31.801774 | 1,473 |
- Resurvey of a GLORIA Target Region in the Swiss National Park (2011)
- There is no doubt that recent global climate change is in process and affects life on earth. Especially mountain ecosystems are supposed to be highly sensitive to climate change due to the vertical compression of life zones, rough abiotic environm... | <urn:uuid:ba3afc57-f7cc-411a-b349-2be760717ef5> | 3.140625 | 447 | Academic Writing | Science & Tech. | 33.37877 | 1,474 |
WASHINGTON (AP) - This probably comes as no surprise: Federal scientists say July was the hottest month ever recorded in the contiguous United States.
The average temperature for the Lower 48 last month was 77.6 degrees. That breaks the old record from July 1936, during the Dust Bowl, by two-tenths of a degree. Records... | <urn:uuid:4556227f-044a-4714-8aba-aab2213b977c> | 3.109375 | 173 | News Article | Science & Tech. | 74.221304 | 1,475 |
Schwenzer, S. P.; Abramov, O.; Allan, C. C.; Clifford, S. M.; Cockell, C. S.; Filiberto, J. ; Kring, D. A.; Lasue, J.; McGovern, P. J.; Newsom, H. E.; Treiman, A. H.; Vaniman, D. T. and Wiens, R. C.
Puncturing Mars: How impact craters interact with the Martian cryosphere.
Earth and Planetary Science Letters, 335
(Click... | <urn:uuid:e7df3a64-d3e8-48ea-94db-184524d80c0d> | 3.015625 | 553 | Academic Writing | Science & Tech. | 43.336904 | 1,476 |
Formation. Location: The Kimberley, NW Australia. Age: Upper Devonian, Frasnian. 350 million years.
Fig.1. 3D skull of the placoderm Mcnamaraspis
kaprios. Courtesy of Dr.J.Long.
The placoderm fish Mcnamaraspis was approximately
25 cm long and, like other placoderms, had a bony head shield
which was joined to the 'shark... | <urn:uuid:52b23c36-4572-4676-8d64-5939c3bfa069> | 3.328125 | 369 | Knowledge Article | Science & Tech. | 64.118406 | 1,477 |
Swiss scientists say Europe's recent rapid temperature increase is likely due to an unexpected greenhouse gas: water vapor.
Researchers at the World Radiation Center in Davos, Switzerland, say elevated surface temperatures caused by other greenhouse gases have enhanced water evaporation and contributed to a cycle that ... | <urn:uuid:e91cbd20-af99-4f5a-977b-543c709f8f58> | 4 | 251 | News Article | Science & Tech. | 8.689417 | 1,478 |
Common Lisp functions are partial; they are not defined for all possible inputs. But ACL2 functions are total. Roughly speaking, the logical function of a given name in ACL2 is a completion of the Common Lisp function of the same name obtained by adding some arbitrary but ``natural'' values on arguments outside the ``i... | <urn:uuid:4e783bcb-b0d6-4ed1-a695-9ba57331844b> | 2.90625 | 328 | Documentation | Software Dev. | 48.296681 | 1,479 |
Article: Python Resources
If I might suggest an addition to the list, I found this tutorial a good synthetic reference:
Heres another great source from MIT open course ware website to check out a whole semester intro to programming video lectures with python. you may want to post above
I want to throw in a few more cod... | <urn:uuid:0d3996d9-da99-42b3-9d3b-8d6a948f93b2> | 2.515625 | 285 | Comment Section | Software Dev. | 52.719168 | 1,480 |
astroengine writes "A microscopic worm used in experiments on the space station not only seems to enjoy living in a microgravity environment, it also appears to get a lifespan boost. This intriguing discovery was made by University of Nottingham scientists who have flown experiments carrying thousands of tiny Caenorhab... | <urn:uuid:478b13dd-7d3a-406d-aeb3-2d5723db179d> | 3.296875 | 161 | Comment Section | Science & Tech. | 24.092045 | 1,481 |
Researchers have developed a more reliable approach to synthetic biology, the assembly of genetic 'standard parts' to create an organism with desired traits. They've been able to combine a library of parts with computer models that help predict the behavior of those parts when they're combined in a living system. The a... | <urn:uuid:8df856e8-dda1-417d-9150-71d6625b3871> | 3.25 | 157 | Truncated | Science & Tech. | 38.843448 | 1,482 |
A lot of ‘performance tests’ are posted online lately. Many times these performance tests are implemented and executed in a way that completely ignores the inner workings of the Java VM. In this post you can find some basic knowledge to improve your performance testing. Remember, I am not a professional performance tes... | <urn:uuid:2e405b66-8473-4b72-8190-81c6e599d87f> | 2.515625 | 1,157 | Personal Blog | Software Dev. | 50.538699 | 1,483 |
Moore’s Law has been around for 46 years. It’s a descriptor for the trend we’ve seen in the development of computer hardware for decades, with no sign of slowing down, where the number of transistors that can be placed on an integrated circuit doubles every two years.
The law is named after Gordon Moore, who described ... | <urn:uuid:734812bf-9f5f-499a-bdf1-37151f9fa6d0> | 3.171875 | 1,939 | Personal Blog | Science & Tech. | 41.568671 | 1,484 |
- Author: Katherine E. Kerlin
How wood is used after it is cleared from a forest and where that forest is located largely affects the amount of greenhouse gas emissions released into the atmosphere, according to a new study by UC Davis.
The study, published this week in the advance online edition of the journal Nature ... | <urn:uuid:61c5ff5f-ee63-4de7-9168-15540a293bf3> | 3.765625 | 591 | News (Org.) | Science & Tech. | 36.536725 | 1,485 |
Authors: H. Ron Harrison
Galileo studied bodies falling under gravity and Tycho Brahe made extensive astronomical observations which led Kepler to formulate his three famous laws of planetary motion. All these observations were of relative motion. This led Newton to propose his theory of gravity which could just as wel... | <urn:uuid:d820d5af-039b-44b9-a401-27f9ab572390> | 3.484375 | 222 | Knowledge Article | Science & Tech. | 28.091749 | 1,486 |
Science Fair Project Encyclopedia
Frequency response is the measure of any system's response to frequency, but is usually used in connection with electronic amplifiers and similar systems, particularly in relation to audio signals. Because the human ear is generally not sensitive to phase, the frequency response is typ... | <urn:uuid:5be33dd9-8d72-447b-9917-95699895403d> | 4.46875 | 354 | Knowledge Article | Science & Tech. | 30.682504 | 1,487 |
Image: Cunjevoi Illustration
Cunjevoi can form large colonies on rock platforms. They have a hard outer coat that is often covered in green and brown algae. Cunjevoi have a cylinder-shaped body with two openings at the top. They can grow up to 30 cm in height.
- Andrew Howells
- © Australian Museum
- Common name:
- Sci... | <urn:uuid:16ebf0e7-2953-45c8-993d-d870e5043971> | 3.9375 | 257 | Knowledge Article | Science & Tech. | 54.011849 | 1,488 |
By Cameron Chai
Scientists at the Brookhaven National Laboratory have discovered the nanostructure of a new carbon form that could explain its behavior as a high-absorbent sponge when it receives electric charge.
The material recently developed at The University of Texas, Austin, could be integrated into “supercapacito... | <urn:uuid:1a59f4b0-ce1e-472e-a3b0-74f4b45d6cec> | 3.40625 | 582 | News Article | Science & Tech. | 14.527729 | 1,489 |
Geodetic Reference Systems
Definition of the various Geodetic Reference Systems and their realizations is not only important with regard to scientific work, but will also be of major importance for the practical applications in the fields of geodesy and navigation if seen against the background of an ever-increasing us... | <urn:uuid:572a17b6-f220-4097-8a87-980eb73f29f7> | 3.6875 | 214 | Documentation | Science & Tech. | 23.702001 | 1,490 |
Double the PressureScience brain teasers require understanding of the physical or biological world and the laws that govern it.
In general, if you have a gas in a container and you double the amount of gas, the new pressure will be double the old pressure. I say "in general" because this isn't exactly true, but it is c... | <urn:uuid:b8ee9860-c7ed-43ec-8f6d-79259c847ee2> | 3.53125 | 396 | Personal Blog | Science & Tech. | 66.143831 | 1,491 |
A new report warns that climate change is causing shifts in species composition faster than expected. Co-author and Cary scientist Peter Groffman comments, "cold temperatures are a critical regulator of species outbreaks and also of species distributions".
A new report says the effects of climate change are already bei... | <urn:uuid:f13243f4-9aae-4b84-aee9-6131e99a276c> | 3.140625 | 255 | News (Org.) | Science & Tech. | 25.715063 | 1,492 |
A QuadTree is a spatial partitioning strategy used to make queries on relationships between 2D spatial data such as coordinates in a Geographic Information System (GIS), or the location of objects in a video game. For instance, you may need to know all of the objects within a region on a map, test whether objects are v... | <urn:uuid:92423e76-6503-4fb6-84f8-b7edcde431ee> | 3.65625 | 2,088 | Documentation | Software Dev. | 43.348559 | 1,493 |
Hi, Im new to coding im after learnig so that i can build websites for myself and my friends ...Im after some help in coding IE: php,html etc to build basic websites that involve images and text. Thanks
I remember when I first started building websites I had trouble understanding what languages were used for what and h... | <urn:uuid:1deb286a-abc5-4cf5-9bd4-9574fb3a5455> | 2.75 | 637 | Comment Section | Software Dev. | 67.537724 | 1,494 |
Did NASA have a dirty little secret about the Apollo 12 mission? A team of researchers have located and reviewed NASA's archived Apollo-era 16 millimeter film -- and have come up with a definitive answer to the persistent claim in both the press and on the Web that a microbe survived 2.5 years on the moon.
Apollo 12 wa... | <urn:uuid:c97602ef-faa0-4bb6-a20a-e324a6c544e7> | 3.90625 | 1,019 | Nonfiction Writing | Science & Tech. | 39.706186 | 1,495 |
There hasn’t been a ton of news coming our of the Phoenix Mars Mission, which landed in late May and is still struggling with soil delivery to on-board labs. Scientists worked with engineers last weekend, examining how the icy soil on Mars interacts with the scoop on the Lander’s robotic arm. They are experimenting wit... | <urn:uuid:73b9662d-c439-438d-baa6-8638fa1fb1e5> | 3.46875 | 417 | News Article | Science & Tech. | 44.759028 | 1,496 |
The Coriolis Effect
The Coriolis force comes from the rotation of Earth. Earth spins on its axis at a rate of one rotation per 24 hours. At the equator, this is equivalent to approximately 1,600 km per hour—this is the speed a person standing at the equator experiences. But at the North and South Poles, the speed is ze... | <urn:uuid:9c20f42c-5b5f-4e59-bccf-7f2b13d70696> | 4.03125 | 1,053 | Tutorial | Science & Tech. | 49.474717 | 1,497 |
The Speed of a Moth
Which is faster? A small moth or a songbird? The answer does surprise. A study published in March 2011 in Proceedings of the Royal Society B by researchers at Rothamsted Research, and the universities of Lund (Sweden), Greenwich and York, reports the surprising finding that night-flying moths are ab... | <urn:uuid:8bf5c9c4-5b82-4313-8bda-f844f514fc6e> | 3.5625 | 838 | Knowledge Article | Science & Tech. | 37.838373 | 1,498 |
A directory is a kind of file that contains other files entered under various names. Directories are a feature of the file system.
Emacs can list the names of the files in a directory as a Lisp list,
or display the names in a buffer using the
ls shell command. In
the latter case, it can optionally display information a... | <urn:uuid:db58271f-d93c-4c47-bbd4-c966b7a25c6d> | 3.15625 | 844 | Documentation | Software Dev. | 46.495689 | 1,499 |