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Emacs Lisp uses two kinds of storage for user-created Lisp objects: normal storage and pure storage. Normal storage is where all the new data created during an Emacs session are kept (see Garbage Collection). Pure storage is used for certain data in the preloaded standard Lisp files—data that should never change during... | <urn:uuid:ad4d8944-58cc-4258-95c3-8dfbddf1f9bf> | 2.640625 | 547 | Documentation | Software Dev. | 42.761805 | 1,500 |
When a symbol is evaluated, it is treated as a variable. The result is the variable's value, if it has one. If the symbol has no value as a variable, the Lisp interpreter signals an error. For more information on the use of variables, see Variables.
In the following example, we set the value of a symbol with
setq. Then... | <urn:uuid:dd936172-8481-4ecf-befa-9e74985ac766> | 3.5 | 205 | Documentation | Software Dev. | 60.766871 | 1,501 |
Page 3 of 3
Now we come to a sideline in the language paradigm story. There is a lot of talk about dynamic languages at the moment. This is partly because until quite recently the dominant languages Java, C++ and C# were static languages - so it's quite a lot about a reaction to the old guard. The static/dynamic distin... | <urn:uuid:d76751d3-0d58-4de9-95c0-a1ce4412c76b> | 2.90625 | 1,010 | Truncated | Software Dev. | 44.909719 | 1,502 |
This article was published originally on 8/25/2010
Alert readers across Iowa and in neighboring states are asking, "Why are there are so many dragonflies this summer?" I'm not sure what explains this larger-than-normal number of dragonflies but callers are reporting anywhere from "dozens" to "hundreds" of dragonflies f... | <urn:uuid:c09fd244-f0ba-4b95-834a-b95040e33159> | 3.140625 | 399 | Knowledge Article | Science & Tech. | 57.702115 | 1,503 |
Historic Caribbean Earthquake Was Felt in NYC
Caribbean seismic hazard map, illustrating the region's complex geologic setting.
CREDIT: U.S. Geological Survey
SAN FRANCISCO — More than 150 years ago, a fault ringing the Caribbean shook half the Atlantic, including New York City, with a mega-earthquake. The quake rivale... | <urn:uuid:72e18fbb-d0ec-45d4-9de1-7805e1506ee2> | 3.4375 | 756 | News Article | Science & Tech. | 57.841236 | 1,504 |
April Showers Bring Midwest Floods
CREDIT: Jesse Allen/NASA
With rivers in the Midwestern United States already full from thawing winter snow cover, severe rainfall in late April added to the troubles for the region. The National Weather Service predicted in February that the region was primed for flooding, and so far ... | <urn:uuid:0999bfa7-b2d9-48e7-a328-d6a146f466d7> | 3.203125 | 558 | News Article | Science & Tech. | 54.03 | 1,505 |
A major focus in tissue engineering is to create materials that improve and direct cellular interaction. This interaction can be probed by measuring the relative number of cells adhered to a surface, which is thought to be an important step in the cascade of cellular fate processes such as stem cell renewal or differen... | <urn:uuid:60497062-85c5-4b78-811f-08dd5ae8ef53> | 2.765625 | 304 | Academic Writing | Science & Tech. | 25.978432 | 1,506 |
Can Solar Panels Replace Nuclear Energy?
A traditional view is that solar power is cool and hip but doesn’t have nearly the production muscle that nuclear has. Solar panels are certainly safer than nuclear energy, but will they ever be able to replace nuclear power plants? One blogger, Dan Hahn, seems to think that sol... | <urn:uuid:666f90a6-d7d3-4f3c-81d0-f78433780cc2> | 2.828125 | 483 | Personal Blog | Science & Tech. | 43.469194 | 1,507 |
Big sunspot unleashes intense solar flare
A sunspot known as AR1654 produced the M1-class flare, according to officials with NASA's Solar Dynamics Observatory.
Fri, Jan 11 2013 at 6:40 PM
This view of the flare on Jan. 11, 2013, was recorded by NASA's Solar Dynamics Observatory. (Photo: NASA)
The surface of the sun eru... | <urn:uuid:c4910c63-d01b-4d60-afb7-aa33a3f948f5> | 3.34375 | 418 | News Article | Science & Tech. | 59.160769 | 1,508 |
Distant starlight has given astronomers the best look yet at a distant icy sibling of Pluto, a dwarf planet called Makemake that appears to be missing its atmosphere, researchers say.
Although this icy world currently lacks an atmosphere, there is still a chance it could form one like a comet when it approaches the poi... | <urn:uuid:b4867299-bdb1-454a-928f-bdfd2875de69> | 3.28125 | 1,266 | News Article | Science & Tech. | 40.139112 | 1,509 |
From Ohio History Central
An image of the Viceroy Butterfly
Viceroy butterflies (Limenitis archippus) look almost identical to the monarch butterfly. The identifying difference is that viceroys have a black line across the hindwing and white dots in the black band along the edge. Their wingspan reaches two and a half t... | <urn:uuid:a1aedaa8-395f-44ee-a687-11a37e804686> | 3.953125 | 371 | Knowledge Article | Science & Tech. | 49.276483 | 1,510 |
Special Report - Cultivating Future Technologies
As the year 2000 arrives, many people are looking back in time to determine how the world will change in the next millennium. Science has always played a significant role in society, but according to Dr. Gerry Stokes, who leads Pacific Northwest National Laboratory's Env... | <urn:uuid:c1dccecb-7abb-42bb-ba4e-6eafc25b490f> | 3.421875 | 1,358 | Audio Transcript | Science & Tech. | 52.746225 | 1,511 |
pg_dumpall is a utility for writing out ("dumping") all PostgreSQL databases of a cluster into one script file. The script file contains SQL commands that can be used as input to psql to restore the databases. It does this by calling pg_dump for each database in a cluster. pg_dumpall also dumps global objects that are ... | <urn:uuid:449026db-5fa6-4865-862f-94728e07a334> | 2.53125 | 2,014 | Documentation | Software Dev. | 48.209411 | 1,512 |
Streaks of condensed water vapor created in the air by jet airplanes at high altitudes. (Merriam-Websters)
Streamer of cloud sometimes observed behind an airplane flying in clear, cold, humid air. (Encyclopaedia Britannica)
A visible cloud streak, usually brilliantly white in color, which trails behind a missile or oth... | <urn:uuid:f1ed41ad-c43b-4e43-8fbe-37fd6c0ed1dc> | 4 | 2,255 | FAQ | Science & Tech. | 45.030325 | 1,513 |
John Graham, an astronomer at the Carnegie Institution of Washington, explains.
The length of a star's life depends on how fast it uses up its nuclear fuel. Our sun, in many ways an average sort of star, has been around for nearly five billion years and has enough fuel to keep going for another five billion years. Almo... | <urn:uuid:04791131-342c-45f0-a292-58e57f41a2d5> | 3.828125 | 529 | Knowledge Article | Science & Tech. | 48.679943 | 1,514 |
by Staff Writers
Washington DC (SPX) Jun 15, 2012
Two of our Milky Way's neighbor galaxies may have had a close encounter billions of years ago, recent studies with the National Science Foundation's Green Bank Telescope (GBT) indicate. The new observations confirm a disputed 2004 discovery of hydrogen gas streaming bet... | <urn:uuid:7a86fc5e-2416-4f57-970d-e4d60a1a52e9> | 2.6875 | 805 | Truncated | Science & Tech. | 41.044724 | 1,515 |
Nasa scientists have no doubt the world will still be in one piece next week, beyond the Mayan-predicted demise on December 21.
They have already released a video, called 'The World Didn't End Yesterday', which pulls the prophecy to bits.
At the outset of the video, meant to be watched by viewers the day after the supp... | <urn:uuid:b7f5762a-b4aa-4791-ad9f-d5479123c3af> | 3.109375 | 322 | News Article | Science & Tech. | 59.801747 | 1,516 |
Lesson 2: Primary Production and Upwelling in the Ocean
Colorful Convection Currents
Materials / Preparation
Review the instructions and video at Easy Science Experiments: Colorful Convection Currents
Each group of students will need:
Groups of two to four
Easy Science Experiments: Colorful Convection Currents includes... | <urn:uuid:4af460aa-762f-4683-bf6f-41f71039e2c4> | 4.09375 | 341 | Tutorial | Science & Tech. | 47.115169 | 1,517 |
Hard shell purple bug at the coast of Puerto Rico
Thu, Feb 26, 2009 at 7:12 PM
I was staying at a hotel on the east coast of the island of Puerto Rico and went to the shore to look at the ocean at around midday. This thing was purple, had a hard shell, did not move at all, about 5 inches long and 3 inches wide. It was ... | <urn:uuid:b118e623-a1a2-48f2-9400-c526bbaad919> | 2.875 | 386 | Comment Section | Science & Tech. | 76.265012 | 1,518 |
Whale of a discovery makes scientific splash
Spade-toothed beaked whale found ashore
It is the world's rarest whale and one of its rarest mammals.
Almost a thing of legend, scientists have never seen a spade-toothed beaked whale alive and, until recently, only had limited skeletal evidence they existed.
So rare is the ... | <urn:uuid:505252b5-9b8c-4e9c-87b0-9a200cac8db4> | 3.703125 | 700 | News Article | Science & Tech. | 55.318404 | 1,519 |
› View larger
Tracking Shuttle Exhaust Reveals More Information About Atmospheric Winds
After the Space Shuttle Atlantis launched for the final time at 11:29 AM (EDT) on July 8, 2011, scientist tracked water vapor in its exhaust on its travels throughout the upper atmosphere. Credit: NASA Photo/Houston Chronicle, Smile... | <urn:uuid:9df45a47-164d-41a0-b86f-ca8ddc144cdb> | 3.53125 | 1,291 | News (Org.) | Science & Tech. | 41.84994 | 1,520 |
Date: October 30, 2012
Department: SMAST / Administration
The proposed research will employ a combination of models and observations from ships and satellites to examine linkages between land and ocean and how these interactions affect the ocean's ability to take up CO2 from the atmosphere.
The project was one of 62 pr... | <urn:uuid:2c9dfd15-7a93-4787-8b14-94d847c56452> | 3.171875 | 361 | News (Org.) | Science & Tech. | 33.873061 | 1,521 |
w3schools is good place to start learning web technologies before reading any other manual or book. Here I am summarizing the relation among most of XML flavors. I’ll recommend it before starting with w3schools.
In addition of above diagram,
- DTD & XSD both do the same job. But XSD is newer than DTD, in form of XML, a... | <urn:uuid:ce674d14-2b01-4381-9f44-dee8ed4fd00e> | 3.0625 | 252 | Personal Blog | Software Dev. | 77.2535 | 1,522 |
1) cell growth
You should look into chemotherapy and cancer medicine in general. Because chemo is mostly effective because it kills fast dividing cells, this has been worked out reasonably well. the 7-10 year number is not really correct, some cells are replaced a lot more slowly.
This is why hair often falls out in ca... | <urn:uuid:d8e27ed7-8a34-4b64-84aa-17d61e576988> | 2.796875 | 285 | Q&A Forum | Science & Tech. | 52.339461 | 1,523 |
Issue Date: July 27, 2009
Making Graphene In A Flash
No time to make graphene via conventional routes? Then make it "in a flash."
Northwestern University scientists have just demonstrated that graphite oxide can be converted instantly to graphene via photothermal deoxygenation by exposing the material to a pulse of lig... | <urn:uuid:494ad5b5-3e68-43f9-89b3-28a60cf127d9> | 3.5 | 275 | News Article | Science & Tech. | 31.771335 | 1,524 |
Interesting case. From the wikipedia article, an average white dwarf has a mass of ~0.6 Msun and a radius of ~0.015 Rsun. If we want it to have the same effective temperature as the Sun, and Earth to end up with the same insolation, then the size a of the orbit is determined by the scaling relation
Originally Posted by... | <urn:uuid:d3b3b87d-83e9-49cb-b468-71ed859f82a4> | 3.328125 | 1,063 | Comment Section | Science & Tech. | 64.952609 | 1,525 |
Sci-tech: The wondrous world of science
Understanding ‘chicken talk’
Having contented birds is the desire of every poultry farmer, as that translates directly to higher productivity. The degree of contentment of chickens can be judged by the sounds they make. Modern computer technologies are now being used to decipher ... | <urn:uuid:10c6c942-5533-4bdb-b466-1653c35ea3b1> | 2.953125 | 931 | News Article | Science & Tech. | 37.128082 | 1,526 |
Metabolic theory of ecology
The metabolic theory of ecology (MTE) is an extension of Kleiber's law and posits that the metabolic rate of organisms is the fundamental biological rate that governs most observed patterns in ecology.
MTE is based on an interpretation of the relationships between body size, body temperature... | <urn:uuid:e327ea2e-76c2-4e42-8b55-8cbed599e974> | 3.359375 | 2,788 | Knowledge Article | Science & Tech. | 50.906667 | 1,527 |
A report on a Joint Cold Spring Harbor Laboratory/Wellcome Trust Conference on 'Prion Biology', Hinxton, UK, 7-11 September 2005.
While most recent prion meetings have focused on either mammals or fungi, the conference on prion biology held near Cambridge this September stood out as an attempt to represent research on ... | <urn:uuid:3faa83c4-5c5c-4959-8c32-b27db40249f9> | 2.53125 | 3,307 | Academic Writing | Science & Tech. | 18.92376 | 1,528 |
Posted at: 02/15/2013 5:28 PM
Updated at: 02/15/2013 5:52 PM
By: Adam Camp, KOB Eyewitness News 4
A once in a lifetime experience is how one University of New Mexico researcher described the astronomical events Friday.
A 150-meter wide meteor went through earth’s atmosphere and landed in Chelyabinsk, Russia. Just hours... | <urn:uuid:9b42e7b0-6be2-4f00-87c7-c6d4fc7b5355> | 2.53125 | 350 | News Article | Science & Tech. | 56.153475 | 1,529 |
The University of Technology in Sydney recently unveiled a new type of graphene nano paper that is ten times stronger than a sheet of steel. Composed of processed and pressed graphite, the material is as thin as a sheet of paper yet incredible durable — this strength and thinness gives it remarkable applications in man... | <urn:uuid:5b1250f5-2334-40d8-bc98-756852d68b45> | 3.4375 | 260 | News Article | Science & Tech. | 25.295302 | 1,530 |
Bosma (1978, 1981b) and Carignan et al. (1990) found a trend for the gas distribution to have the same shape as DM distribution. This correlation between gas and DM is puzzling and if real, has no easy explanation in the light of present CDM models. Not only is there a general trend, but several individual features fou... | <urn:uuid:3a38209a-5693-4578-9f8c-b9ccd07f7656> | 2.546875 | 202 | Academic Writing | Science & Tech. | 62.287289 | 1,531 |
Author Sandy Andelman says "Conservation agencies are spending ten's of millions of dollars on systematic planning, but it doesn't translate to saving wildlife". "We need to reallocate dollars spent on 'perfect world' planning scenarios to aggressively pursue opportunities to safeguard habitat for species that are most... | <urn:uuid:37d4efd7-26a4-4b08-bf1f-517d71c094ae> | 3.546875 | 313 | News Article | Science & Tech. | 18.078077 | 1,532 |
Find the vertices of a pentagon given the midpoints of its sides.
You are only given the three midpoints of the sides of a triangle.
How can you construct the original triangle?
Prove that, given any three parallel lines, an equilateral triangle
always exists with one vertex on each of the three lines. | <urn:uuid:354dfe81-ec61-4ea5-b660-7fd74a658943> | 3.015625 | 69 | Q&A Forum | Science & Tech. | 54.514552 | 1,533 |
- Stabile Isotope (1) (remove)
- How availability and quality of nectar and honeydew shape an Australian rainforest ant community (2003)
- Ant communities visiting nectar and honeydew sources were studied in a tropical lowland rainforest in North Queensland, Australia. The study focused on the hypothesis whether the di... | <urn:uuid:42dd3319-7a1b-4b87-b562-e263b9b65661> | 3.703125 | 1,055 | Academic Writing | Science & Tech. | 11.762268 | 1,534 |
| The Dip Needle is a compass pivoted to move
in the plane containing the magnetic field vector of the earth. It will then
show the angle which the magnetic field makes with the vertical.
The needle must be accurately balanced so that only magnetic torques are exerted on it. Some texts suggest that the dip angle be mea... | <urn:uuid:76a1661c-89cf-47bd-8e0a-26c495acf022> | 4.1875 | 786 | Knowledge Article | Science & Tech. | 50.417341 | 1,535 |
Or in other words, are there differences in average Lyapunov timescale between orbits interior to Jupiter and orbits exterior to Jupiter? I'm trying to answer a question at http://www.quora.com/Why-does-Pluto-have-so-many-satellites/answer/Alex-K-Chen but I'm not totally sure if the last part of my answer is right. I'l... | <urn:uuid:14d2270a-42ab-4f12-bf74-9d46cd9b6424> | 2.65625 | 488 | Q&A Forum | Science & Tech. | 45.951891 | 1,536 |
Vortex2: world's largest tornado research project ever, is underway
Tornado season is in full swing, and researchers are now poised in America's Great Plains with the largest armada of storm chasing vehicles and equipment ever assembled, in order to learn more about these enigmatic and violent storms. The massive Vorte... | <urn:uuid:10842590-8f82-42a8-b381-02bf47bf72cf> | 3.484375 | 991 | News (Org.) | Science & Tech. | 53.755846 | 1,537 |
Engineers Map Volcanic Lightning
Lightning sensors could lead to better eruption warnings
Photo: Carlos Gutierrez/UPI/Landov
FLASH, CRACKLE, POP! Lightning might warn of imminent eruptions.
This story was updated on 31 March 2009.
Volcanic eruptions are often accompanied by spectacular bursts of lightning—Krakatoa, Mou... | <urn:uuid:eab72cb4-a43b-44cb-a4ea-c2ac18aa3c90> | 4.09375 | 1,002 | News Article | Science & Tech. | 39.26499 | 1,538 |
Southern Leopard Frog (Rana sphenocephala)
- The southern leopard frog grows to a length of 2 to 3.5 inches (about 5 to 9 cm). Its color varies from tan to several shades of brown to green. The dorsum (back) is usually covered with irregular dark brown spots between distinct light colored areas. Large dark spots on its... | <urn:uuid:fd96980e-3086-43f3-95d0-b4803516e1e5> | 3.5 | 669 | Knowledge Article | Science & Tech. | 54.859145 | 1,539 |
The objective of this research is to derive land surface temperature from GOES data at hourly intervals for atmospheric model assimilation to improve short range weather forecasts and nowcasting applications.
The rate of change of LST is sensitive to the characteristics of the land surface such as soil moisture, land u... | <urn:uuid:2f21f48a-e54c-4de9-9d0c-ae8025a36d58> | 2.734375 | 581 | Academic Writing | Science & Tech. | 17.613696 | 1,540 |
The experimental evidence collected during the last few years has strongly supported the view that the α particle is a charged helium atom, but it has been found exceedingly difficult to give a decisive proof of the relation. In recent papers, Rutherford and Geiger have supplied still further evidence of the correctnes... | <urn:uuid:6a2988d4-b120-4574-856d-1ccb64753461> | 3.28125 | 2,242 | Academic Writing | Science & Tech. | 49.773656 | 1,541 |
|How did spiral galaxy
510-13 get bent out of shape?
The disks of many spirals are
thin and flat, but not solid.
Spiral disks are loose conglomerations of
billions of stars and diffuse gas all
orbiting a galaxy center.
A flat disk is thought to be created by sticky collisions
of large gas clouds early in the
Warped dis... | <urn:uuid:49b1c263-7fa5-42c0-b697-7147a60e3d9b> | 3.875 | 182 | Content Listing | Science & Tech. | 57.234464 | 1,542 |
December's lunar eclipse graced
early morning skies
over the Rocky Mountains in Colorado, USA.
There, this wintry scene
finds the Moon in a cold
blue twilight sky near
the western horizon, above the snowy North American Continental Divide.
About 22 minutes before the sunrise, the reddened lunar disk
is almost completel... | <urn:uuid:f6a90978-b093-447c-a002-cf22b5a57ae5> | 2.625 | 147 | Knowledge Article | Science & Tech. | 38.016257 | 1,543 |
Invertebrates in your Backyard
Uses these techniques to discover what invertebrates call your backyard home.
There are many techniques to survey the invertebrates in your backyard. Use a combination to determine the diversity of invertebrates in your local area.
- Pitfall traps sampling involves placing a small contain... | <urn:uuid:bf8ce52c-b8eb-4ec5-bf57-aa1d2128cd64> | 3.609375 | 300 | Tutorial | Science & Tech. | 42.087295 | 1,544 |
Gas Secretion and Absorption
One clear advantage of having a swimbladder is that little to no extra energy is necessary in order to remain stationary at a constant level of water. Only a slight control by use of the pectoral fins is required to balance out the propulsive force of water exiting the gills. Fish with no s... | <urn:uuid:47085c8f-8d09-4145-9f4e-721220e95ed6> | 3.28125 | 242 | Knowledge Article | Science & Tech. | 29.725455 | 1,545 |
scintillation counterArticle Free Pass
scintillation counter, radiation detector that is triggered by a flash of light (or scintillation) produced when ionizing radiation traverses certain solid or liquid substances (phosphors), among which are thallium-activated sodium iodide, zinc sulfide, and organic compounds such ... | <urn:uuid:6be9a152-1f49-45d9-a567-ae82a6556749> | 3.71875 | 173 | Knowledge Article | Science & Tech. | 18.958151 | 1,546 |
Strong Name (further referred to as "SN") is a
technology introduced with the .NET platform and it brings many possibilities into
.NET applications. But many .NET developers still see Strong Names as security
enablers (which is very wrong!) and not as a technology uniquely identifying
assemblies. There is a lot of misu... | <urn:uuid:b84d8062-e5ab-452e-a009-8ca6e73e32bb> | 2.78125 | 2,694 | Documentation | Software Dev. | 44.48637 | 1,547 |
There are several contributing factors into the decline of the U.S. space
agency, though immediate fixes are not evident. Even though NASA has a
long string of success, the unfortunate shuttle Columbia disaster in 2003,
budget issues, and the looming 2010 retirement of the current generation of
space shuttles are all c... | <urn:uuid:be22bbcf-4a22-4eb5-bdb8-52fd32208c88> | 3.046875 | 444 | News Article | Science & Tech. | 51.175609 | 1,548 |
international university researchers claim that humans have thrown off the
balance between the Earth's rotation, surface air temperatures and
movements in its molten core through our contribution of greenhouse gases.
included in the study were Jean Dickey and Steven Marcus from NASA's Jet
Propulsion Laboratory, along w... | <urn:uuid:84080301-03dd-4db5-9f9b-6687a3503e2d> | 3.90625 | 855 | News Article | Science & Tech. | 30.750369 | 1,549 |
What is Cookies?
Interview question and answer by: Hariinakoti
| Posted on: 4/7/2012 | Category: ASP.NET Interview questions
| Views: 702 | | Points: 40
Cookie is a small amount of memory used by webserver with client system.
* The cookie variables will be accesible across different web pages of website towards *client... | <urn:uuid:e3dbea54-319b-4063-bac5-c13670035df0> | 2.9375 | 187 | Q&A Forum | Software Dev. | 39.372425 | 1,550 |
Inorganic chemistry is a subdiscipline of chemistry involving the scientific study of the properties and chemical reactions of all chemical elements and chemical compounds other than the vast number of organic compounds (compounds containing at least one carbon-hydrogen covalent bond).
There are a number of subdivision... | <urn:uuid:f933f0b0-610c-449f-a556-9bf8472284ce> | 3.46875 | 2,710 | Knowledge Article | Science & Tech. | 16.615599 | 1,551 |
A smaller version of an instrument now flying on NASA's Van Allen Probes has won a coveted spot aboard an upcoming NASA-sponsored Cubesat mission — the perfect platform for this pint-size, solid-state telescope.
Weighing just 3.3 pounds, the Compact Relativistic Electron and Proton Telescope (CREPT) will "augment the s... | <urn:uuid:8e36c9c8-481d-48c3-9b03-aa4e6d111d49> | 3.953125 | 953 | News (Org.) | Science & Tech. | 40.366252 | 1,552 |
The U.S Global Change
Research Program (USGCRP) stands at the threshold of a major transition.
Over the next several years, in addition to continuing to improve our understanding
of the Earthís environment and how it is changing, the program will greatly
advance our knowledge about the implications of such change for s... | <urn:uuid:7890996e-52d9-4ce6-8c91-b278dcc7e655> | 3.21875 | 1,018 | About (Org.) | Science & Tech. | 13.780409 | 1,553 |
Node:About Environments, Next:Local Variables, Up:About Closure
We said earlier that a variable name in a Scheme program is associated with a location in which any kind of Scheme value may be stored. (Incidentally, the term "vcell" is often used in Lisp and Scheme circles as an alternative to "location".) Thus part of ... | <urn:uuid:0e09e307-3238-43ac-a509-667b6a95dfa0> | 3.421875 | 288 | Documentation | Software Dev. | 31.52659 | 1,554 |
Sphere Packing and Kissing Numbers
Problems of arranging balls densely arise in many
situations, particularly in coding theory (the balls are formed by the
sets of inputs that the error-correction would map into a single
The most important question in this area is Kepler's problem:
what is the most dense packing of sph... | <urn:uuid:fea2ca5c-cf20-4f76-b9e1-3edc485e9b77> | 2.953125 | 1,526 | Content Listing | Science & Tech. | 44.055508 | 1,555 |
Author: This chapter originally appeared as a part of Simkovics, 1998, Stefan Simkovics' Master's Thesis prepared at Vienna University of Technology under the direction of O.Univ.Prof.Dr. Georg Gottlob and Univ.Ass. Mag. Katrin Seyr.
This chapter gives an overview of the internal structure of the backend of Postgres. A... | <urn:uuid:3aa46c79-c265-4a30-a6aa-fe4ce255093a> | 2.796875 | 525 | Documentation | Software Dev. | 49.172672 | 1,556 |
Astronomers Avi Loeb and Edwin Turner recently published a paper proposing a technique for detecting extraterrestrials: use telescopes to look for light pollution from alien cities. From the paper's abstract:
This method opens a new window in the search for extraterrestrial civilizations. The search can be extended bey... | <urn:uuid:71056b40-3231-48d4-8c6c-da6e6dd93ba8> | 2.984375 | 254 | Personal Blog | Science & Tech. | 18.383095 | 1,557 |
HERE‘s the latest on an issue to which not nearly enough attention is paid by government and industry:
A new study looking at 11,000 years of climate temperatures shows the world in the middle of a dramatic U-turn, lurching from near-record cooling to a heat spike.
Research released Thursday in the journal Science uses... | <urn:uuid:0e577c18-ba39-47c9-99b1-c7b9a7130af7> | 2.84375 | 121 | Truncated | Science & Tech. | 53.065202 | 1,558 |
Our oceans are in trouble and so are we. That's the message from Sylvia Earle, keynote speaker Wednesday morning at the Blue Ocean Film Festival and Conservation Event in Monterey.
The good news, she said, is that new technology can raise our awareness, enhance our exploration and improve our ability to act — without e... | <urn:uuid:4075308c-9699-4856-a29c-c224c378edd2> | 2.9375 | 813 | News Article | Science & Tech. | 40.301448 | 1,559 |
Pieces of the Moon and Mars have been found on Earth before, as well as chunks of Vesta and other asteroids — but what about the innermost planet, Mercury? That’s where some researchers think this greenish meteorite may have originated, based on its curious composition and the most recent data from NASA’s Messenger spa... | <urn:uuid:e2782b1a-0e7c-4a39-9c4d-b913e292f4f0> | 3.109375 | 620 | News Article | Science & Tech. | 38.346038 | 1,560 |
Look up monthly U.S., Statewide, Divisional, and Regional Temperature, Precipitation, Degree Days, and Palmer (Drought) rankings for 1-12, 18, 24, 36, 48, 60-month, and Year-to-Date time periods. Data and statistics are as of January 1895.
Please note, Degree Days are not available for Agricultural Belts
Contiguous U.S... | <urn:uuid:44c6c220-b0b7-41c6-bc3d-957d70d5f2f0> | 2.796875 | 144 | Structured Data | Science & Tech. | 60.488056 | 1,561 |
The ozone hole
The discovery by the British Antarctic Survey of the Antarctic ozone hole provided an early warning of the dangerous thinning of the ozone layer worldwide, and spurred international efforts to curb the production of CFCs. If the provisions of the Montreal Protocol on Substances that Deplete the Ozone Lay... | <urn:uuid:78370fd3-6a2c-43e2-b150-55e15fa377b4> | 4.03125 | 396 | Knowledge Article | Science & Tech. | 18.894781 | 1,562 |
By Hans Christian von Baeyer
I pick up a stone and playfully fling it into Lake Matoaka. The stone rises gracefully through the morning air, tips over, and ends its symmetrical trajectory with a plop. Like countless baseballs, footballs, and basketballs, like lumps of lava hurled out of bubbling volcanoes when Earth wa... | <urn:uuid:dab52129-0da8-4a29-a678-a9edf98c4eee> | 3.296875 | 630 | Nonfiction Writing | Science & Tech. | 48.910207 | 1,563 |
Atmospheric Sciences & Global Change Division
Pollution + Storm Clouds = Warmer Atmosphere
Computer modeling reveals new insights on interactions between pollution particles and storms
An anvil cloud looms over the Southern Great Plains site location of the U.S. Department of Energy’s Atmospheric Radiation Measurements... | <urn:uuid:e0b6a78d-f2ec-4cff-b194-d185bfc422eb> | 3.3125 | 520 | Knowledge Article | Science & Tech. | 42.86746 | 1,564 |
New Discovery Affirms RTB Model Predictions
Even though I’m a budget-hotel kinda guy, occasionally I splurge and stay in a really nice place. It’s fun to get a chance to experience firsthand how the “other half” lives.
A recent study of some of the microbes found in Lake Matano (Indonesia), the world’s eighth deepest l... | <urn:uuid:0c69b601-c37f-4007-8051-b594a6e92bf0> | 3.25 | 1,262 | News Article | Science & Tech. | 38.198549 | 1,565 |
Latitude And Rain Dictated Where Species Lived
More than 200 million years ago, mammals and reptiles lived in their own separate worlds on the supercontinent Pangaea, despite little geographical incentive to do so. Mammals lived in areas of twice-yearly seasonal rainfall; reptiles stayed in areas where rains came just ... | <urn:uuid:f3c83f07-5d87-43fc-8d42-a95031cc8ee9> | 3.796875 | 1,083 | News Article | Science & Tech. | 33.06125 | 1,566 |
Java Swing tutorials - Here you will find many Java Swing examples with running source code. Source code provide here are fully tested and you can use it in your program. Java Swing tutorials first gives you brief description of Swing and then many example are provided. Swing is mostly used for the development of Deskt... | <urn:uuid:0018ddc9-7121-4808-9052-700dce018c20> | 3.3125 | 2,060 | Tutorial | Software Dev. | 53.849763 | 1,567 |
Apr. 1, 2010 A hitherto unknown reproductive system in a species closely related to the olive tree, Phillyrea angustifolia L., has been discovered by researchers in France.
This system explains the high concentration of male individuals co-occurring with hermaphrodites in this species. The hermaphrodites, whose blossom... | <urn:uuid:96c5cc19-1110-42dc-8c08-f3d28cfe3ca5> | 3.140625 | 958 | News Article | Science & Tech. | 19.122737 | 1,568 |
|San José State University|
& Tornado Alley
The equipment for demonstrating the Aharonov-Bohm effect consists of a source of uniform energy electrons, a screen with two slits in it, a screen to capture the interference pattern and a solenoid. The solenoid is an electromagnet encased in an iron tube. The iron tube captu... | <urn:uuid:8bb68c4a-91f9-40f5-919f-3a7a122fd716> | 3.921875 | 767 | Academic Writing | Science & Tech. | 47.624724 | 1,569 |
How does GPS work?
The science behind GPS
Now that you know how GPS has been developed, it's time to dive deeper into the subject and find out exactly what happens before your navigation device tells you exactly where you are.
The location of the satellites
To work out where you are, your navigation device needs to kno... | <urn:uuid:96cfd2f1-74d0-4653-8f07-d0d884012d4b> | 3.84375 | 226 | Knowledge Article | Science & Tech. | 43.046091 | 1,570 |
GREENBELT, Md., Aug. 16 (UPI) -- An instrument aboard a NASA orbiter has detected helium in the moon's tenuous atmosphere, the space agency said.
These remote-sensing observations by the Lunar Reconnaissance Orbiter confirm measurements taken in 1972 by an experiment deployed on the moon's surface by Apollo 17, a NASA ... | <urn:uuid:bb3b5a6b-302c-47ec-be49-e731b57d2c87> | 3.34375 | 442 | News Article | Science & Tech. | 45.698887 | 1,571 |
Links to ornithology programs at Patuxent Wildlife Research Center, Laurel, MD, including large scale survey analysis of bird populations, research tools, datasets and analyses, bird identification, and seasonal bird lists.
Describes how social scientists and natural resource managers work together to develop cooperati... | <urn:uuid:e11c4302-137c-4820-82c6-0e06d5e21ad5> | 2.640625 | 172 | Content Listing | Science & Tech. | 23.327664 | 1,572 |
Phenomena described by geophysicist in non-technical terms
As Alaska’s billion lakes become colder and harder, some of them will sport mysterious, spidery cracks extending from small holes in the ice. This phenomenon inspired a geophysicist to figure out what he calls “lake stars.”
“I thought something so pretty and re... | <urn:uuid:703f01c6-a707-4a42-9d1a-30047283dc45> | 3.9375 | 827 | News Article | Science & Tech. | 47.659033 | 1,573 |
Blending of an eclipse image (from the High Altitude Observatory) with a Yohkoh X-ray image (from the Yohkoh Science Team).
Click on image for full size
Image courtesy of the High Altitude Observatory, National Center for Atmospheric Research (NCAR), Boulder, Colorado,
The Solar Corona
Rising above the Sun's chromosphe... | <urn:uuid:5dc7c933-f1a8-4233-a15d-01e38018e0ce> | 3.75 | 736 | Content Listing | Science & Tech. | 55.508054 | 1,574 |
Satellite data suggests that March, 2011 was the coolest in more than a decade. The average worldwide temperature in March was .18 degrees below the 30-year average for the month. It was the coldest March since 1999. February was also cold with temperatures running .03 degrees below the long-term average. Satellites be... | <urn:uuid:cac9379d-97c9-4cd8-8915-863f64fb6294> | 3.875 | 153 | Knowledge Article | Science & Tech. | 34.913214 | 1,575 |
In mid-July this year, a roar echoed around one of the most remote inlets of northern Greenland -- and an island was born. No ordinary island, but a huge chunk of ice, roughly twice the size of Manhattan, that had broken from the Petermann Glacier.
Scientists gave it the romantic name of PII-2012 and watched it begin t... | <urn:uuid:5b932368-dc0c-4f38-a00c-adc7721b212a> | 3.28125 | 581 | News Article | Science & Tech. | 47.84558 | 1,576 |
Shale Shocked: ‘Remarkable Increase’ In U.S. Earthquakes ‘Almost Certainly Manmade,’ USGS Scientists Report
A U.S. Geological Survey (USGS) team has found that a sharp jump in earthquakes in America’s heartland appears to be linked to oil and natural gas drilling operations.
As hydraulic fracturing has exploded onto th... | <urn:uuid:55dc7eab-76e0-411f-90d6-503ba50de262> | 3.109375 | 515 | Personal Blog | Science & Tech. | 43.561945 | 1,577 |
AROS is a multitasking operating system. This essentially means that multiple
programs may be run at the same time. Every program running is called a task.
But there are also tasks that are not user-programs. There are, for example,
tasks handling the file-system and tasks watching the input devices. Every
task gets a ... | <urn:uuid:7673a73f-8801-4880-9065-a4adbabd2564> | 2.890625 | 1,625 | Documentation | Software Dev. | 61.993126 | 1,578 |
Biologists at San Francisco State University are tagging radio trackers onto zombie-like bees infected with a fly parasite to find out more about species population decline.
Bees that are infected with the Apocephalus borealis fly abandon their hives and congregate near outside lights, moving in erratic circles on the ... | <urn:uuid:3d14124d-1e98-41eb-8e7e-cea022d82c89> | 2.734375 | 504 | News Article | Science & Tech. | 34.168939 | 1,579 |
Welcome to the May 2007 episode of Blueshift, from NASA Goddard Space Flight Center. We’ll discuss our search for Earth-like planets outside of our own Solar System. We’ll also look into gamma ray bursts, and how the Swift satellite team is working to solve their mysteries. This episode includes a brain teaser and mail... | <urn:uuid:bad56675-aba6-4202-b500-2e69c5345eca> | 2.546875 | 551 | Truncated | Science & Tech. | 43.264414 | 1,580 |
One of the world’s most innovative new ideas looks a lot like a stack of Tupperware containers filled with dirt.
And technically, it is.
But it’s also a dirt-powered battery dreamed up by Harvard’s Erez Lieberman-Aiden. And the Bill & Melinda Gates Foundation thinks it just might be a game changer for the developing wo... | <urn:uuid:ee48ec8e-dba7-4545-a046-9efa09cde3bb> | 2.546875 | 195 | News Article | Science & Tech. | 45.262353 | 1,581 |
Copyright © 1999 by Akimasa Nakamura (Kuma Kogen Astronomical Observatory, Japan)
The CCD image was taken on 1999 October 9.65 UT, using a 0.60-m f/6 Ritchey-Chretien telescope.
This comet was found during 1987 January by Jennifer Wiseman on two photographic plates exposed on 1986 December 28.29 and 28.34 by Brian Skif... | <urn:uuid:43600f47-0efc-43f9-9491-5c6155cd41a8> | 2.640625 | 616 | Knowledge Article | Science & Tech. | 61.659008 | 1,582 |
Oil spill planning and response remains the primary use of these maps, however they are finding ever-widening use in such areas as coastal resource inventories and assessments, coastal planning, and recreational planning.
The Time Period section in this metadata record represents the dates when the data and information... | <urn:uuid:ad996d49-989d-4d96-a2d2-ab8ba958e3b3> | 3.078125 | 1,589 | Structured Data | Science & Tech. | 17.090912 | 1,583 |
hi, this is my first post here. Am a little nervous thinking how my post will be. but i will try my best to take you through the topic and make you understand the topic. the topic i will discuss is called "Decorator pattern". i will just discuss when to use the decorator pattern and just the basic concept of decorator ... | <urn:uuid:800cc3b0-0ac4-4945-b6f6-d994be68074d> | 3.171875 | 482 | Q&A Forum | Software Dev. | 60.226167 | 1,584 |
Common Lisp/Advanced topics/Numbers
Common Lisp has much more support for performing number-crunching tasks than most programming languages. This is achieved by having support for large integers, rational numbers, and complex numbers, as well as many functions to work on them.
Types of numbers
The hierarchy of the numb... | <urn:uuid:b4ceb744-f5db-4e95-9895-5dbe65dc5e7a> | 3.8125 | 1,381 | Documentation | Software Dev. | 46.045618 | 1,585 |
It was good to hear from Fed Duay, a two-year veteran of my AP Summer Institute at Manhattan College*
* Which, for the uninitiated, is in the Bronx. No, I don't get it, either.
I have two questions. We are doing the "B field of a straight wire lab", where we can use a compass aligned to the earth's magnetic field and t... | <urn:uuid:22b4e8f5-47bd-4302-b161-36fc729adaa3> | 2.53125 | 672 | Q&A Forum | Science & Tech. | 62.518955 | 1,586 |
Using static and non static synchronized method for protecting shared resource is another Java mistake we are going to discuss in this part of our series “learning from mistakes in Java”. In last article we have seen why double and float should not be used for monetary calculation , In this tutorial we will find out wh... | <urn:uuid:23db3bb2-76f3-4261-89ab-37b4430f0042> | 3.25 | 454 | Personal Blog | Software Dev. | 27.496129 | 1,587 |
Manual Section... (3) - page: __freadable
NAME__fbufsize, __flbf, __fpending, __fpurge, __freadable, __freading, __fsetlocking, __fwritable, __fwriting, _flushlbf - interfaces to stdio FILE structure
size_t __fbufsize(FILE *stream);
size_t __fpending(FILE *stream);
int __flbf(FILE *stream);
int __freadable(FILE *stream... | <urn:uuid:e77222d6-a18c-4015-8e61-20614c40f79d> | 3.046875 | 674 | Documentation | Software Dev. | 49.381047 | 1,588 |
Assembly: System.Xml (in system.xml.dll)
XmlResolver is used to resolve external XML resources, such as entities, document type definitions (DTDs), or schemas. It is also used to process include and import elements found in Extensible StyleSheet Language (XSL) style sheets or XML Schema definition language (XSD) schema... | <urn:uuid:e62b0074-7250-4434-8314-3fccf4f71da8> | 2.890625 | 561 | Documentation | Software Dev. | 37.327043 | 1,589 |
4.3 Physical Basis
So far, the motivation for the GCLF as a standard candle is almost totally empirical rather than theoretical. The astrophysical basis for its similarity from one galaxy to another is a challenging problem, and is probably less well understood than for any other standard candle currently in use. Becau... | <urn:uuid:3af92f83-cf0f-481c-b4c8-c107f2a3f871> | 2.9375 | 520 | Academic Writing | Science & Tech. | 40.514769 | 1,590 |
You are currently browsing the category archive for the ‘Combinatorics’ category.
Sometimes sequences of numbers are defined recursively, so that given the previous terms of the sequence we can find the next term. A classic example of this is the sequence of Fibonacci numbers, where every two consecutive terms determin... | <urn:uuid:6cd7ff11-4326-4fa1-9a67-4b6c632dcf70> | 2.9375 | 379 | Personal Blog | Science & Tech. | 38.804486 | 1,591 |
Diamond anvil cells can apply millions of atmospheres of pressure to a solid or liquid, while allowing it to be observed through the diamond “windows.” For the first time, researchers have introduced optical tweezers into one of these cells in order to trap sample particles. The experiment, described in Physical Review... | <urn:uuid:8238d2d8-6334-43a0-a3d0-3e6f29acb91c> | 4.15625 | 349 | Academic Writing | Science & Tech. | 31.953036 | 1,592 |
Quantum system can emit only photons with energy equal (within the uncertainty) to the difference between two energy states.
Even if the atom is in a superposition of energy states
\left|\Psi\right> = C_0 \left|0\right> + C_1 \left|1\right> + C_2 \left|2\right> + \ldots \qquad (1)
with average energy somewhere between ... | <urn:uuid:b33feb16-7bb6-42d7-8b99-6b9496ca2c1b> | 3.125 | 375 | Q&A Forum | Science & Tech. | 46.866902 | 1,593 |
The story of the Minotaur
Mazes are very ancient and appear many times in history. According to ancient legend, Daedalus constructed the so called "Cretan Labyrinth" in Knossos, to house the legendary Minotaur. The Minotaur was a fearsome creature, half man and half bull killed by Theseus in the famous legend in which ... | <urn:uuid:05c0c1fe-24ae-4ddf-8924-8b37af8dcb6a> | 3.5 | 4,013 | Knowledge Article | Science & Tech. | 58.711724 | 1,594 |
Doomsday is still a long way away, but this is what might happen.
Have you ever wondered where we and our planet originally came from or what might happen to our galaxy billions of years from now? These aren’t just philosophical questions — scientists have been looking for clues to our origins and our fate for the last... | <urn:uuid:83c61231-5ead-4d97-81e9-099628de7813> | 3.5625 | 596 | News Article | Science & Tech. | 44.674878 | 1,595 |
When Precipitation Patterns Change
Part A: What is Drought?
In Lab 3, you learned to interpret climographs to understand a location's normal climate. Another way that climographs can be used is to plot current conditions over a background of the average conditionsthis provides a graphic way to see how the current year ... | <urn:uuid:a0c307c8-239d-46b9-a835-41bb2a32f766> | 3.765625 | 1,148 | Tutorial | Science & Tech. | 49.347593 | 1,596 |
|The H2 Double-Slit Experiment: Where Quantum and Classical Physics Meet|
For the first time, an international research team carried out a double-slit experiment in H2, the smallest and simplest molecule. Thomas Young's original experiment in 1803 passed light through two slits cut in a solid thin plate. In the groundb... | <urn:uuid:d5a97766-4890-4e47-b8ad-668a033e2f72> | 3.46875 | 1,125 | Academic Writing | Science & Tech. | 43.942948 | 1,597 |
Sometimes the average is anything but average
Facts About Factorials
It all begins with the factorial function, a familiar item of furniture in several areas of mathematics, including combinatorics and probability theory. The factorial of a positive whole number n is the product of all the integers from 1 through n inc... | <urn:uuid:0f69be89-9ec2-48a2-a75c-2c25280ff747> | 3.453125 | 787 | Personal Blog | Science & Tech. | 62.551725 | 1,598 |
Image via Wikipedia
Did you know that some frogs talk with ultra-sound? In ultrasound, the pitch or frequency of the sound is too high for the human ear to hear. Fish and homing pigeons can see electromagnetic fields, ants can see polarised light, insects and rodents can smell pheromones, so why can't some frogs, somew... | <urn:uuid:ec1cf832-4b4c-4628-85cc-09d3ea032a4f> | 2.953125 | 312 | Personal Blog | Science & Tech. | 70.702906 | 1,599 |