text large_stringlengths 148 17k | id large_stringlengths 47 47 | score float64 2.69 5.31 | tokens int64 36 7.79k | format large_stringclasses 13
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An efficient implementation of maps from integer keys to values (dictionaries).
These modules are intended to be imported qualified, to avoid name clashes with Prelude functions, e.g.
import Data.IntMap (IntMap) import qualified Data.IntMap as IntMap
The implementation is based on big-endian patricia trees. This data
s... | <urn:uuid:96e519f4-d41b-42a1-a595-b5d0799e6f5a> | 2.796875 | 303 | Documentation | Software Dev. | 46.998333 |
Chandra: Exploring the Invisible Universe
Sources: NASA and Harvard-Smithsonian Center for Astrophysics.
NASA's most powerful X-ray telescope, called the Chandra X-ray Observatory (CXO), was launched from the space shuttle Columbia on July 23, 1999. The spacecraft could remain in orbit for 25–50 years and the scientifi... | <urn:uuid:a3384ffc-f65a-4f42-b281-1c7df78e1e36> | 4.15625 | 643 | Knowledge Article | Science & Tech. | 41.020861 |
Polymers and UV Sensitivity
Date: June 2006
Why polymers with aromatic groups inside their
chain (as polycarbonate or PET) are less sensitive to UV then
polymers with side aromatic groups (PS)?
The UV sensitivity of a polymer depends on many factors than the
nominal chemical formula. Commercial polymers are most often
... | <urn:uuid:d4347849-1af8-4540-a417-1bbcc7562d0b> | 2.734375 | 400 | Knowledge Article | Science & Tech. | 28.948231 |
Revista Brasileira de Ciência do Solo
Print version ISSN 0100-0683
CAMPOS, José Ricardo da Rocha et al. Pedochronology and development of peat bog in the environmental protection area pau-de-fruta - Diamantina, Brazil. Rev. Bras. Ciênc. Solo [online]. 2010, vol.34, n.6, pp. 1965-1975. ISSN 0100-0683. http://dx.doi.org/... | <urn:uuid:6deb5aee-af9e-4484-a314-0d3fac1f5ca5> | 2.953125 | 527 | Academic Writing | Science & Tech. | 36.411364 |
Studying the Cartesian Diver 2.25
Taking principles developed by Greek philosopher Archimedes more than 2,000 years ago, students constructed their own Cartesian Diver to study the relationship between buoyancy and density.
The Cartesian Diver is named for 17th century French scientist René Descartes although his conne... | <urn:uuid:0458075b-5a4d-43b8-903c-684a33ea9b5d> | 3.78125 | 301 | Nonfiction Writing | Science & Tech. | 55.37181 |
In the previous php mysql tutorial
we went over the basics of php and mysql. With some information on installing the software(s).
Setting up a MYSQL Database
Before we go any further the first thing we need to do is create a database so we know what to build our php scripts around. For this tutorial we are going to bas... | <urn:uuid:4b6ec204-7d5c-47e3-b686-8feb6d4466ce> | 2.90625 | 1,375 | Comment Section | Software Dev. | 63.891374 |
Weight and mass are not synonymous.
Weight is a force.
The weight of an object depends on its location - things can weigh differently in different places.
The first thing to realize about weight is that weight is not the same as mass, even though the terms are used synonymously in everyday life. Mass measures inertia -... | <urn:uuid:2cbb6efa-05f2-489e-be06-975c3bb4f754> | 3.65625 | 722 | Knowledge Article | Science & Tech. | 62.420323 |
Black Sea chemistry and biodiversity is highly coupled with the lack of vertical currents, present in oceans or bigger seas. (Some ) effects are limited salinity in the top layers - and many ocean fish species cannot live in black sea - and limited space for life (under 50 meters there is no oxygen)
Can the jellyfish p... | <urn:uuid:b4b49e1b-19ac-462e-a777-8c7270dd857e> | 2.8125 | 137 | Q&A Forum | Science & Tech. | 25.033816 |
How should you start? What are the best and easiest ways to create a website, and what is each of these languages people talk about?
HTML, CSS & PHP.
ASP & C#.
So you want to learn programming? Interested in those shiny websited, applications you use at your job, or maybe the huge amounts involved with about each and e... | <urn:uuid:0d960089-f23b-457d-bacd-4351cd994a03> | 2.984375 | 945 | Tutorial | Software Dev. | 71.902623 |
The Pennsylvania Migration Count (PAMC)
Posted: April 30, 2011
Saturday 14 May, 2011
*What is the Pennsylvania Migration Count? The Pennsylvania Migration Count (PAMC) was established to gather annual data on migratory bird populations, and to help answer some fundamental questions regarding their distribution througho... | <urn:uuid:36bf9314-d4d8-4099-8cc0-b6429af059e2> | 2.921875 | 670 | Knowledge Article | Science & Tech. | 51.242219 |
Michael Fowler UVa
A very simple spreadsheet animating the process. Press and hold the end of thescrollbar.
This spreadsheet plots the motion of a damped oscillator: you can specify the initial conditions and degree of damping, and find critical damping.
An external driving force is added to the previous spreadsheet: s... | <urn:uuid:44a01fb0-da41-4401-a8f8-a3d25f28f66e> | 3.8125 | 268 | Content Listing | Science & Tech. | 52.64 |
At the end of the pre-equilibrium stage, or a thermalizing process, the residual nucleus is supposed to be left in an equilibrium state, in which the excitation energy is shared by a large number of nucleons. Such an equilibrated compound nucleus is characterized by its mass, charge and excitation energy with no furthe... | <urn:uuid:81b8cb71-e3aa-45ef-b0df-7bc6fd7e32b7> | 3.4375 | 176 | Academic Writing | Science & Tech. | 35.0125 |
Now for the solution to the question in my previous post, which asked what you can learn about , given the sequence of integers .
Nick Johnson commented:
Well, the obvious thing one can learn given just |(10^n)r| is the first n digits of the decimal expansion of r.
For example, when we are given , we can say with confi... | <urn:uuid:4201c3df-ede8-4f27-8d22-88f160649446> | 3.5625 | 743 | Personal Blog | Science & Tech. | 74.837493 |
No, not because it was too young to drink! Scientists at the Max Planck Institute for Extraterrestrial Physics were looking at some X-ray objects, and discovered something really weird: a very bright X-ray source moving out of a galaxy at nearly 3,000 kilometers/second! This thing is a goner. If our Sun were moving at ... | <urn:uuid:24a02fc5-372b-48a7-b1a2-2fca23e74741> | 3.546875 | 593 | Personal Blog | Science & Tech. | 59.908153 |
Record Melting in Greenland
Here's what I think: The knuckle-dragging foolishness about global warming of the sort we're seeing in Montana or hearing on NPR isn't going to last much longer, because things are going to get very serious very soon. This image from microwave data from NASA's invaluable Earth Observatory sh... | <urn:uuid:980bcf18-f42c-47bd-b030-7b13af8feee8> | 2.984375 | 203 | Personal Blog | Science & Tech. | 62.996525 |
, common name
A common name of a taxon or organism is a name in general use within a community; it is often contrasted with the scientific name for the same organism...
s the Burgundy snail
, Roman snail
, edible snail
or escargot, is a species
In biology, a species is one of the basic units of biological classificatio... | <urn:uuid:57c6d1da-b1a0-41e3-8af7-56026114418a> | 3.25 | 2,442 | Knowledge Article | Science & Tech. | 51.010237 |
milleporeArticle Free Pass
millepore, also called stinging coral, or pepper coral, (Millepora), any of a genus of invertebrate marine animals comprising the order Milleporina (phylum Cnidaria). Millepores are common in shallow tropical seas to depths of 30 metres (about 100 feet). Unlike the true corals, which belong t... | <urn:uuid:5647e6f4-92dd-4950-a153-369ad58bd5fa> | 3.875 | 217 | Knowledge Article | Science & Tech. | 38.006364 |
The old parable says that if you teach a man to fish, you will feed him for a lifetime. But what if there were no fish to be caught?
In the Abrolhos region of Brazil’s Bahia state, CI and its network of partners are working to make sure that never happens.
The coastal waters there contain the most diverse concentration... | <urn:uuid:161605d9-bfed-442c-a18c-9e65495de1de> | 2.984375 | 418 | Knowledge Article | Science & Tech. | 25.079565 |
Interviewee: Stephen Fodor.
Stephen Fodor talks about the photolithographic technique used to synthesize pieces of DNA on the surface of GeneChips™.
(DNAi Location: Manipulation > Techniques > Large-scale analysis > Interviews >
GeneChips™, step by step)
The way we make these DNA chips is that we actually build the DNA... | <urn:uuid:1c139f2f-f759-46be-833d-d669d6797763> | 3.234375 | 294 | Audio Transcript | Science & Tech. | 33.361268 |
For some people, the best part about buying a new car is its factory-fresh new car smell, a distinctive aroma created when the chemicals and residual solvents used to manufacture dashboards, car seats, carpeting and other vehicle appointments outgas and fill the cabin.
While the scent may be alluring to some, many rese... | <urn:uuid:27c53d45-7e76-48f5-bad0-c86bd66874e7> | 3.28125 | 1,389 | Content Listing | Science & Tech. | 31.201683 |
Ascophyllum nodosum with epiphytic sponges and ascidians on variable salinity infralittoral rock
Ecological and functional relationships
The biotope is found in very shallow submerged rocky habitats in lagoons, subject to variable or permanently reduced salinity conditions. These particular habitat conditions lead to a... | <urn:uuid:4298afaa-1554-4eea-a48a-cefe22f09d5d> | 3.46875 | 1,852 | Knowledge Article | Science & Tech. | 20.701197 |
Do the Sources of
by Prakhar Naithani and Zack Heath
In this web page, you'll learn about the severe drought problems that NC has been through since the summer of 2007-2008.
You'll learn about how their water supply is in need and the course this battle will take and has taken to get the thirst in control before it can... | <urn:uuid:e3208849-2544-4ade-8675-952a6fc9f32e> | 2.890625 | 134 | Truncated | Science & Tech. | 48.5 |
The color of light produced by a hot object depends on its temperature. This has to do with the fact that more energetic light produced a different wavelength of light. The wavelength, frequency, and energy of light are related by
This can be observed visually by considering a traveling wave. Consider a point
located i... | <urn:uuid:52d29173-120f-4d5f-946b-77e8755f5b74> | 4.1875 | 346 | Knowledge Article | Science & Tech. | 60.397941 |
Your Environmental Footprint
Calculate your footprint and learn how to have less of an impact on the environment.
What is an environmental footprint?
Everything we do affects the environment around us, creating an environmental footprint that tells a great deal about us as individuals and as a society. As the world's
p... | <urn:uuid:69ddbede-93a1-465d-b721-cb008395c336> | 3.453125 | 2,692 | Tutorial | Science & Tech. | 48.948954 |
I have heard that there is no limit on the growth of trees, but then why do some trees, such as boxelders and poplars, tend to live shorter than redwoods, for example? Some advertisements for improved lombardy poplars state that their trees have an extended life span, up to 75 years?
Although most plants can potentiall... | <urn:uuid:994a4dad-f80f-49c5-ab65-fa5429d20dbd> | 3.515625 | 170 | Q&A Forum | Science & Tech. | 34.595 |
Hey, although I am novice with programming in c++, I would like to know "how to make a game." (I know that phrase is throw around alot)
I'm not going to attempt to any time soon, but I would like to know what it takes.
What are the steps and what do I need to know to do so? Could I make a simple tic tac toe game with o... | <urn:uuid:86996e9b-7a74-470e-9911-8fad8bf2811a> | 2.765625 | 151 | Q&A Forum | Software Dev. | 82.238305 |
Average Temperature of the Northern Hemisphere based on published research. The black line at the right is instrumental data recorded since 1856; follow the link to see the other sources. Figure created by Robert A. Rohde and distributed under a Creative Commons License.
Today representatives from numerous countries an... | <urn:uuid:fc374bea-c85b-479f-a483-ec90f6cf8be3> | 3.21875 | 346 | Personal Blog | Science & Tech. | 46.881666 |
Declares an exception handler.
An exception handler may be declared to respond to a specific exception condition or one or more of the exception class groups SQLEXCEPTION, SQLWARNING or NOT FOUND. An exception handler that responds to one or more exception class groups is called a general exception handler.
A specific ... | <urn:uuid:a7943fd5-dedd-467e-91dc-f667e053aeca> | 3.015625 | 620 | Documentation | Software Dev. | 38.815588 |
Table of Contents
This chapter explains some concepts of the KCachegrind, and introduces terms used in the interface.
Cost counts of event types (like L2 Misses) are attributed to cost entities, which are items with relationship to source code or data structures of a given program. Cost entities not only can be simple ... | <urn:uuid:94b7368f-d05b-479d-ad0e-98f181b5d71e> | 2.984375 | 657 | Documentation | Software Dev. | 43.046437 |
Sesquiterpenes are a class of terpenes that consist of three isoprene units and have the molecular formula C15H24. Like monoterpenes, sesquiterpenes may be acyclic or contain rings, including many unique combinations. Biochemical modifications such as oxidation or rearrangement produce the related sesquiterpenoids.
Ses... | <urn:uuid:b0b68892-5acb-464a-890f-847ab8a101e0> | 3.140625 | 539 | Knowledge Article | Science & Tech. | 22.780775 |
The mimic octopus, which can imitate flatfish and sea snakes to dupe potential predators, may well be the king of impersonation. By creatively configuring its limbs, adopting characteristic undulating movements, and displaying conspicuous color patterns, the mimic octopus can successfully pass for a number of different... | <urn:uuid:05b16748-1081-4f36-8980-1c27437aa27a> | 2.75 | 218 | Content Listing | Science & Tech. | 21.829386 |
Conventions Used in This Book
This book uses several conventions to help you prioritize and reference the information it contains.
In addition, the following special elements provide information beyond the basic instructions:
From concept to deployment, C#Builder Kick Start provides the information you need to begin bu... | <urn:uuid:1197f691-0e63-4ea6-a780-5012f9cd667e> | 2.734375 | 1,698 | Truncated | Software Dev. | 45.586455 |
Q: How to avoid problems with include files?
A: If you declare a class in your code the compiler normally needs to know some information about the used class like e.g. size. But if you just uses a pointer or a reference, the compiler doesn't need to know those information at that point since pointers or references are ... | <urn:uuid:fed80f46-97c0-4bf9-a874-6c18c0a58ad3> | 3.3125 | 373 | Q&A Forum | Software Dev. | 58.417628 |
Atmospheric Pressure |
Surface Wind Velocity and Direction |
Atmospheric Humidity ||
Precipitation | Clouds | Special Instruments | Weather Satellites |
A. Pilot Balloon/Theodolite
A Pilot Balloon is a meteorological balloon that is filled with gas lighter than air. When the pilot balloon is used in conjunction with a ... | <urn:uuid:1b22dba6-20ca-47b7-a079-4b4686528f03> | 3.703125 | 506 | Knowledge Article | Science & Tech. | 34.607537 |
In "Algebra Functions," a function is described as a set of data that has one distinct output (y) for each input (x). A function also describes the relationship between inputs (x) and outputs (y). As a testament to the various patterns between x and y, several types of functions exist.
- Absolute Value
Each type of Alg... | <urn:uuid:4b5c6d3e-9246-4d2e-aa2f-117fdffdc40d> | 3.96875 | 328 | Tutorial | Science & Tech. | 58.653947 |
One result of a workshop held in 2008 that “broad research themes within theoretical computer science…that have potential for a major impact in the future, and distill these research directions into compelling “nuggets” that can quickly convey their importance to a layperson” is this set of nuggets. Among the summary o... | <urn:uuid:77b0bb39-e3a0-4693-b0d7-cc9f8864375b> | 2.828125 | 321 | Personal Blog | Science & Tech. | 29.207988 |
Space is a challenging place. We think of it as mostly empty, but that is not completely true. The vast sea of space in our solar system is filled with powerful radiation and bombarded with high-speed atomic particles. In addition, the Sun generates a continuous stream of particles that we call the "solar wind." The hi... | <urn:uuid:bfef28e7-2b0f-4f58-addf-1ce513a58e2e> | 3.96875 | 472 | Knowledge Article | Science & Tech. | 38.278173 |
Saturday 15 June
Eastern Cape dwarf cycad (Encephalartos caffer)
Eastern Cape dwarf cycad fact file
- Find out more
- Print factsheet
Eastern Cape dwarf cycad description
This rare plant typically has an underground stem, with a small portion on top, the stem is only very rarely branched and may be as much as 40 cm lon... | <urn:uuid:8d30d239-3723-4b30-834e-4d6b8686ce7d> | 3.703125 | 1,661 | Knowledge Article | Science & Tech. | 31.85001 |
The various ecological and economic benefits of tropical marine seascapes and their biodiversity are under threat by a variety of sources, including human development and climate change. Globally, mangroves are being cleared at a quicker rate than tropical rainforests, and tropical fisheries are significantly over-fish... | <urn:uuid:30dc6fec-90f0-461d-9824-a6f0c4ead7ba> | 4 | 1,388 | Knowledge Article | Science & Tech. | 24.18617 |
a. Surface Layer: from surface down to a few hundred meters. This layer is heated or cooled by the air above and/or sunlight. Significant mixing can occur that equalizes the temperature.
b. Main Thermocline: always characterized by a rapid drop in temperature to near 35 F. Essentially all the deep water is isothermal a... | <urn:uuid:3a468221-65be-4f68-83df-f0936a016c49> | 4.1875 | 288 | Knowledge Article | Science & Tech. | 43.911375 |
Victorian-Era Pressed Flowers Help Ecologists Study Climate Change
Here's an extremely cool tidbit of environmental news. Ecologists are studying collections of pressed plants from Victorian England to learn more about climate change. The early spider orchids from Southern England are in collections with notes showing ... | <urn:uuid:b487aece-6a6a-4c17-9fb6-3aeb8442ba9a> | 3.140625 | 196 | Personal Blog | Science & Tech. | 48.154649 |
Spiders are invertebrate creatures in the araneae order of the class arachnida in the phylum arthropoda. A spider has up to eight eyes, eight legs and seven silk-producing glands in its abdomen. These glands secrete proteins that are extruded through spinnerets to produce different kinds of silk. Many spiders, particul... | <urn:uuid:a5c377e5-82bc-4764-abde-00aef99d5935> | 4.125 | 1,370 | Knowledge Article | Science & Tech. | 52.801198 |
You may want to save this post at Uncommon Descent, in case it disappears down the memory hole.
If you’ve been following Intelligent Design, you’ve probably run across William Dembski’s notion of Complex Specified Information, or CSI. Basically, the argument is that if a system has CSI above a certain level, then it wa... | <urn:uuid:36f1d128-1556-4954-91da-f4f5ae3d36a8> | 2.6875 | 707 | Comment Section | Science & Tech. | 63.221458 |
The classic example of an introduced-species-gone-awry gets even worse. Not only do living cane toads regularly kill many of Australia’s endemic predators that hunt and eat the hopping meals, dead toads—common roadkill along Australia’s highways—are threatening local aquatic fauna.
Cane toads have blighted Australia ev... | <urn:uuid:5d16dc9b-5517-415f-880c-934ff5d26cec> | 3.390625 | 351 | Truncated | Science & Tech. | 30.083954 |
INCREASING RAIN IN THE DESERT:
three continents come new ways of solving an old problem
Scientists believe it may be possible
to increase rainfall in arid areas. (Photo by Digital Vision/Getty
Because of a population boom in the United Arab Emirates (UAE), government
leaders are facing a fundamental challenge: keeping ... | <urn:uuid:fc320ed6-5ed7-4b8f-829b-48a137a9e0c8> | 3.515625 | 1,528 | Knowledge Article | Science & Tech. | 27.821489 |
Hurricanes (Tropical Cyclones)
Hurricane season in the Atlantic begins June 1st and ends November 30th so there's always a chance for some hurricane excitement when you go to the Eastern Shore.
Divine Wind: The History and Science of Hurricanes
q QC944.E43 2005
"With exceptionally clear prose, Emanuel explains the atmo... | <urn:uuid:6b465c4f-eb6e-4962-912e-34bb7bbdc320> | 2.953125 | 825 | Content Listing | Science & Tech. | 39.991272 |
Library Home || Primary || Math Fundamentals || Pre-Algebra ||
Algebra || Geometry || Discrete Math || Trig/Calc
|Math Fundamentals, difficulty level 3. Use this exploration problem to discover the relation between circumference and diameter.|
|Please Note: Use of the following materials requires membership. Please see... | <urn:uuid:21fdd357-fdb0-48cb-bcb1-7d8f2a9e789a> | 3.203125 | 117 | Content Listing | Science & Tech. | 20.045541 |
Clearly we can't have three collinear points on a sphere. Look at the "on a sphere" case and assume there is a configuration where they do not all lie on a single sphere.
Any three points define a plane. The locus of points equidistant from these three is a line perpendicular to the plane (through the circumcentre). Th... | <urn:uuid:63047dc9-1b46-419b-9dcc-fe54222616fc> | 3.09375 | 331 | Q&A Forum | Science & Tech. | 56.888654 |
A total order on a set is a way of ordering its elements to say that some elements precede others, with the understanding that any two elements can be compared one way or the other.
A toset is a set equipped with a total order.
The category of finite nonempty totally ordered sets and order-preserving maps is called , t... | <urn:uuid:99c442d3-3303-4909-b184-6f81b950ea17> | 2.75 | 310 | Knowledge Article | Science & Tech. | 24.696753 |
C got stuck right in, marvelling at how the little objects immediately stuck to the bottom of the giant magnets. She spent a lot of time testing out which ones would stick and was perplexed by the fact that some wouldn’t. We talked about what materials they were made of and she soon picked up that only the metal items ... | <urn:uuid:721499af-38fc-4a49-a754-98ef1de3dfb4> | 3.46875 | 390 | Personal Blog | Science & Tech. | 57.460897 |
The double star, Porrima, is a double star system located about 40 light-years away, relatively close to the Sun in the grand scheme of things. The two stars orbit each other about every 170 years, and as they do so, the apparent distance that separates them changes (from our Earth-bound point of view). Right now, the ... | <urn:uuid:9c4011d5-a178-4f2e-a7ef-8df1d1554b5b> | 3.328125 | 223 | Personal Blog | Science & Tech. | 53.3825 |
In the absence of public funded science education and projects, did conflict and climatic uncertainty drive human evolution? http://www.bbc.co.uk/news/science-environment-19598980
What explains the extraordinarily fast rate of evolution in the human lineage over the past two million years?
A leading human origins resea... | <urn:uuid:63820689-46b3-417d-9f65-481a56e1e411> | 3.328125 | 608 | Comment Section | Science & Tech. | 39.631686 |
Science Fair Project Encyclopedia
The trachea (IPA /'treikiə/), or windpipe, is a tube extending from the larynx to the bronchi in mammals, and from the pharynx to the syrinx in birds, carrying air to the lungs. It is lined with ciliated cells which push particles out and reinforced with cartilage rings.
In ill or inju... | <urn:uuid:fd051a88-af45-4e67-893f-3edd2013cd2a> | 3.640625 | 513 | Knowledge Article | Science & Tech. | 44.534911 |
Plants producing Oxygen at Night
e.heim at bluewin.ch
Sat Oct 21 13:32:05 EST 2000
No, I dont think, that plants can produce oxygen at night. For oxygen
production they need light. It might be possible, that some kind of plants
produce oxygen during the time you have put on the lights in your bedroom.
But when it is da... | <urn:uuid:122ffef2-3f74-4a2f-9a7e-13e5fe4fc6a7> | 3.015625 | 316 | Comment Section | Science & Tech. | 70.618966 |
Since when are evolutionary biologists supposed to be experts in physics?
1/12/2007 3:05:33 AM
Because electrons in a potential well can only exist in a limited number of quantized states, none of which can be described as \"stuck to the nucleus\".
Here's the \"can't be arsed to learn physics beyond 8th grade\" version... | <urn:uuid:6777bdee-7943-493a-8eb1-3de67e56e4d8> | 2.875 | 523 | Comment Section | Science & Tech. | 80.255 |
What is Photosynthesis?
by Govindjee and Rajni Govindjee
Photosynthesis converts massive amount of Sunlight into electrical and then chemical energy. The input is carbon dioxide (CO2), water (H
2O), minerals and light, and the output is carbohydrates (food) that we need for our nourishment, and oxygen that we need to b... | <urn:uuid:3b126f4c-4cbb-426b-930f-0aff1a317a84> | 3.6875 | 2,096 | Knowledge Article | Science & Tech. | 46.619574 |
There is no guarantee that your questions here will ever be answered. You can be published anonymously - just let us know!
From Meltem YAGLI
Answered By Ben Okopnik
Hello, I am the researh assistant in Eastern Mediterranean University, and i am doing master in computer engineering department. About the adaptation of li... | <urn:uuid:9bae0574-2c1f-4f0b-8408-e386d537fc57> | 2.71875 | 479 | Q&A Forum | Software Dev. | 79.522546 |
A SPECIES of African monkey has added charcoal to its diet, apparently to help it overcome the chemical defences of the plants it eats. The monkeys can now tolerate a wider range of plants and, as a result, their population has soared.
Scientists working on the east African island of Zanzibar observed that in one part ... | <urn:uuid:bf75b47a-15a2-4bbb-89e2-152468bcfcd0> | 3.6875 | 151 | Truncated | Science & Tech. | 44.509814 |
Saturday, 1 February 1997
Why don't penguins' feet freeze?
Why do Antarctic penguins' feet not freeze in winter when they are in constant contact with the ice and snow? Years ago I heard on the radio that scientists had discovered that penguins had colateral circulation in their feet that prevented them from freezing b... | <urn:uuid:afa701ba-44ff-45d0-ad82-2150df66256e> | 2.71875 | 103 | Personal Blog | Science & Tech. | 47.370139 |
TOM BEARDEN: A decade ago, Camille Parmesan was spending months in the California back country doing scientific research on the biology of butterflies. She found something she wasn't looking for.
CAMILLE PARMESAN: I was really working on more basic questions of their evolution of diet and their behavior and looking for... | <urn:uuid:e67f5c3d-79a0-44be-8369-6787affabbc8> | 3.25 | 1,866 | Audio Transcript | Science & Tech. | 54.321557 |
- The brain contains neural machinery for recognizing errors, correcting them, and optimizing behavior.
- The neurotransmitter dopamine plays a major role in our ability to learn from our mistakes. Genetic variants that affect dopamine signaling may partly explain differences between people in the extent to which they ... | <urn:uuid:0c215f3a-3e1e-4f57-b984-87788ac5bfe3> | 3.328125 | 195 | Truncated | Science & Tech. | 21.347857 |
Wilson Bentley, an early 20th century farmer from Jehrico, Vermont, is best remembered as the "Snowflake Man" for his thousands of marvelous snowflake photographs. But Bentley also was a student of the rain. Hi, I'm Dave Thurlow and this is The Weather Notebook.
While photographing snowflakes was his life's work, for s... | <urn:uuid:736fd959-2068-45ba-8700-9199ccb33046> | 3.28125 | 358 | Audio Transcript | Science & Tech. | 46.46379 |
Recipe for the Perfect James Webb Space Telescope Mirror
Mirrors are a critical part of any space telescope, and the James Webb Space Telescope's mirrors are made of a special element that will enable it to withstand the rigors of space and see farther back in time/distance than any other telescope now in operation.
Sp... | <urn:uuid:29c6b6a0-2aad-4fa8-ae93-9ed03bd6fe54> | 4.21875 | 1,163 | Knowledge Article | Science & Tech. | 42.305724 |
Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
2001 January 17
Explanation: Why is NGC 3310 bursting with young stars? The brightest of these new stars are so hot that they light up this spiral g... | <urn:uuid:19f5abd0-3fac-4351-8f8d-54f4fb9c1338> | 3.765625 | 261 | Knowledge Article | Science & Tech. | 47.340777 |
The equation for respiration is C6H12O6+6O2→6CO2+6H2O+36ATP. The chemical formula for ATP is C10H16N5O13P3. How is this possible, since it violates the law of conservation of mass because it is ...
When a human being exhales $CO_2$, what is, by the numbers, the main source of carbon atoms exiting the body in this way? ... | <urn:uuid:ee45d6ba-49a6-45f5-8eeb-4ef4e32386fb> | 3.171875 | 268 | Q&A Forum | Science & Tech. | 69.754927 |
(3 quadrocopters = 12 rotors)
To toss the ball, the quadrocopters accelerate rapidly outward to stretch the net tight between them and launch the ball up. Notice in the video that the quadrocopters are then pulled forcefully inward by the tension in the elastic net, and must rapidly stabilize in order to avoid a collis... | <urn:uuid:42ad6a2b-3942-4a4e-b313-87c24475c07d> | 3.359375 | 125 | Tutorial | Science & Tech. | 32.6625 |
Summary: Solid carbon dioxide is added to a large beaker of water containing universal indicator. As the CO2 dissolves, the indicator changes from neutral (green) to acidic (orange).
Dry Ice is extemely cold, use gloves or tongs when handling.
Chemicals and Solutions:
universal indicator solution
2 lbs. dry ice
25 mL o... | <urn:uuid:73777b8a-a85d-4e25-ab02-50b328ce28c8> | 3.109375 | 216 | Tutorial | Science & Tech. | 51.990893 |
Index of dispersion
In probability theory and statistics, the index of dispersion, dispersion index, coefficient of dispersion, or variance-to-mean ratio (VMR), like the coefficient of variation, is a normalized measure of the dispersion of a probability distribution: it is a measure used to quantify whether a set of o... | <urn:uuid:11a73c91-edca-42f5-a7c2-ab2e0c733b8c> | 3.734375 | 1,330 | Knowledge Article | Science & Tech. | 40.392554 |
Meet the Tiniest Wing-Propelled Diver
Most wing-propelled diving birds are fairly large, ocean-going fellows. Not so for the smallest species to adapt this strategy. Cinclidae are a very special group of songbirds that hunt underwater for insect prey in freshwater streams. These marvelous little birds are capable of bo... | <urn:uuid:3f231796-937d-4da4-88ae-13470872cbfc> | 3.75 | 330 | Personal Blog | Science & Tech. | 34.330248 |
close closes stream.
Closing a stream means
that it may no longer be used in input or output operations.
The act of closing a file stream
ends the association between the stream and its associated file;
the transaction with the file system is terminated,
and input/output may no longer be performed on the stream.
If abo... | <urn:uuid:315c56fe-61e1-4416-aaab-c5612e2864a4> | 2.796875 | 293 | Documentation | Software Dev. | 42.679525 |
Project Title: Evaluating Tsunami Hazards to the Atlantic and Caribbean Coasts
Mendenhall Fellow: Alberto Lopez-Venegas, email@example.com
Duty Station: Woods Hole, MA
Start Date: October 1, 2006
Education: Ph.D. 2006, Northwestern University, Geophysics
Research Advisors: Uri ten Brink, (508) 457-2396, firstname.lastn... | <urn:uuid:43a22a35-c2ae-4e8f-a581-c9a33a13ed68> | 2.875 | 1,159 | Academic Writing | Science & Tech. | 48.860095 |
Interleaving the binary encodings of the two numbers a and b seems to be the best solution:
For example the encoding of
a = 20d = 10100b
b = 5d = 101b
We interleave the bits starting with the least significant bits (we pad shorter numbers with 0's so they are the same length).
The two original numbers resulting paired ... | <urn:uuid:5d9ba81a-817d-49a6-aab7-48fa07a69008> | 3.078125 | 177 | Knowledge Article | Science & Tech. | 78.268357 |
Imagine a space faring civilization hurtling between galaxies at speeds fast enough to travel from Earth to the moon in seven minutes! They are being propelled by the gravitational energy of a black hole. And, their "spaceship" has resources for supporting a population of several billion.
This sounds like far out scien... | <urn:uuid:89abc3a7-70aa-4a3f-bf1e-b432b3cf41cf> | 3.703125 | 1,061 | Nonfiction Writing | Science & Tech. | 49.811304 |
Jupiter is the largest planet in the solar system, and claims one of its most enigmatic satellites. In 1979, heavy volcanic activity was discovered on Io - the first such instance confirmed outside of planet Earth. The gases emitted during Io's volcanic eruptions are the foundation for research into a variety of space ... | <urn:uuid:ab6a3334-de9e-46fa-96ae-57e0813def48> | 3.234375 | 1,594 | Audio Transcript | Science & Tech. | 45.232515 |
File:Glacier Mass Balance.png
From Global Warming Art
This figure shows the change in average thickness of mountain glaciers around the world. This information, known as the glaciological mass balance, is found by measuring the annual snow accumulation and subtracting surface ablation driven by melting, sublimation, or... | <urn:uuid:3b188253-1e67-4d0d-8cba-625148b0e4e0> | 3.765625 | 613 | Knowledge Article | Science & Tech. | 52.791578 |
In this tutorial, we will introduce you the DOCTYPE of HTML5. DOCTYPE stands for document type declaration. It is an instruction not a tag that informs the web browser about the version of the page in which it is written. It is essential information for rendering the program as after recognizing the version, the web br... | <urn:uuid:23881a9a-f9a2-4e46-b137-a438f8de288e> | 3.4375 | 260 | Documentation | Software Dev. | 62.5798 |
A massive lightning flash that extends from the top of a thundercloud up to the ionosphere.
Han-Tzong Su of National Cheng Kung University of Taiwan and his colleagues report in the June 25 Nature that they've observed another new type of lightning "gigantic jets." The researchers used low-light cameras to capture imag... | <urn:uuid:6b571f65-9687-49f2-a0c7-9070b12a7ca4> | 3.515625 | 658 | Knowledge Article | Science & Tech. | 34.286645 |
The Origin of Matter
The question of how matter triumphed over antimatter in the formation of the universe still awaits a satisfactory answer
One of the first questions for cosmologists, posed most elegantly by the Russian dissident physicist Andrei Sakharov, is: Why is there stuff? In the first moments after the big b... | <urn:uuid:c0aebb9e-5008-4bed-b048-a3f7b73b9f8e> | 3.1875 | 180 | Truncated | Science & Tech. | 21.797179 |
Clues from hurricane 'fingerprints'
Scientists decode hurricane 'records' left in trees and rocks to try to predict the strength of future storms.
(Page 2 of 2)
To gather that information, scientists first turned to sediment cores taken from marshes, lagoons, and lakes behind barrier beaches. This "is the most useful a... | <urn:uuid:33895f57-d715-4c5d-9ba6-2507527b02f7> | 3.671875 | 869 | Truncated | Science & Tech. | 48.444194 |
How to add a ReadOnly property in C#?
Property - A property is an entity that describes the features of an object.
A property is a piece of data contained within a class that has an exposed interface
for reading/writing. Looking at that definition, you might think you could declare a
public variable in a class and call... | <urn:uuid:7e909691-79d8-4aa4-a977-d58f5af7daea> | 3.1875 | 245 | Tutorial | Software Dev. | 53.483917 |
There are thousands of species of insects that begin life as caterpillars. It is nearly impossible to identify them without seeing them, and even then it can be quite difficult. Features to note are whether they are smooth, hairy, bristled, or spiny; presence or absence of knobs, bumps, a rear horn, fleshy filaments, o... | <urn:uuid:4e2745d3-402f-4afd-85bf-0bb235c3f174> | 3 | 107 | Q&A Forum | Science & Tech. | 32.458658 |
A brief digression into other DTDs may help make clear what parts of the previous section were specific to DocBook and what parts are general to all structural-markup languages.
TEI (Text Encoding Initiative) is a large, elaborate DTD used primarily in academia for computer transcription of literary texts. TEI's Unix-b... | <urn:uuid:0072514b-e2bf-4bab-be88-4a35dd9a3a07> | 2.703125 | 204 | Knowledge Article | Software Dev. | 45.519286 |
Research Aims to Develop Fishery-independent Methods for Assessing Coral Reef Fish Populations in the Main Hawaiian Islands
During September 1-13, 2012, the NOAA Ship Oscar Elton Sette is conducting a research cruise to improve assessments of reef fish populations in the main Hawaiian Islands. The focus is on reef habi... | <urn:uuid:3a729037-7a82-4b57-9578-30798779f6f6> | 3.015625 | 1,291 | Knowledge Article | Science & Tech. | 45.621801 |
The LNP_TEST function computes the Lomb Normalized Periodogram of two sample populations X and Y and tests the hypothesis that the populations represent a significant periodic signal against the hypothesis that they represent random noise.
LNP_TEST is based on the routine
fasper described in section 13.8 of Numerical R... | <urn:uuid:59846aae-46c1-428e-ab19-29bf1130f25e> | 3.3125 | 857 | Documentation | Science & Tech. | 77.256962 |
Welcome to PhysLink.com - Your physics and astronomy online portal. Stay a while! Check out our extensive library of educational and reference materials. Also, check out our fun section!
What are some examples of cohesion and adhesion?
Asked by: Leroy
Cohesion is the term for molecules of a substance sticking together.... | <urn:uuid:da1d0c5a-9a7d-460e-9951-2c187a4becbf> | 3.9375 | 543 | Q&A Forum | Science & Tech. | 43.399967 |
from the urls-we-dig-up dept
The search for intelligent life might be more fruitful if we started looking more closely at other animals right here on Earth. The progress of artificial intelligence in computers might also be surpassed by breeding a few hyper-intelligent pets someday. Some zoo animals are already playing... | <urn:uuid:7b60eb44-7b07-4c8a-81cf-216851008c4e> | 2.84375 | 297 | Listicle | Science & Tech. | 48.179169 |
from the urls-we-dig-up dept
Neil Armstrong's recent passing has reminded lots of folks about the first manned mission to the moon. The whole idea that "we could put a man on the moon" seemed incredible in the 1960's, and the feat is still remarkably difficult -- even if kids today can't fully appreciate the accomplish... | <urn:uuid:dc07227c-54d3-46be-b221-b709a6c8411d> | 2.796875 | 283 | Content Listing | Science & Tech. | 58.332691 |
A total solar eclipse occurred over the northeastern Australian coast early in the morning of November 14 local time.
Clueless about this spectacular astronomical event? No worries, we've got you covered. We're here to explain what causes this remarkable act of nature, what skygazers see and how those outside of Austra... | <urn:uuid:da0c3aff-7508-4cfe-90a7-7f2e45768adc> | 3.421875 | 427 | Knowledge Article | Science & Tech. | 50.385 |
As if we needed further evidence for the intelligence of corvids, researchers studying New Caledonian Crows have found them using mirrors to solve problems.
Scientists captured 10 wild birds and placed them in large cages in order to record their behaviour in response to mirrors.Further tests ruled out the possibility ... | <urn:uuid:f823385a-b873-4c13-a076-465b4a089b24> | 3.546875 | 349 | Personal Blog | Science & Tech. | 43.598448 |
Mud, marine snow and coral reefs
Wolanski, Eric, Richmond, Robert, McCook, Laurence, and Sweatman, Hugh (2003) Mud, marine snow and coral reefs. American Scientist, 91 (1). pp. 44-51.
|PDF - Repository staff only - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader|
View at Publisher Website: http://dx.... | <urn:uuid:cd6498a4-1b19-4516-a45a-d2a1d505fb98> | 2.8125 | 249 | Academic Writing | Science & Tech. | 64.665833 |
|Ivars Peterson's MathTrek|
April 1, 1996
Euclid's Elements, which presented the state of the art in geometry around 300 B.C., has been extraordinarily influential. This massive, 13-volume compendium set the standard for precise mathematical exposition and discourse for many centuries. More than 2,000 editions have bee... | <urn:uuid:dfa5652b-3be8-48d6-b1de-80f74fd2f602> | 3.671875 | 1,566 | Knowledge Article | Science & Tech. | 50.813503 |
SCICEX: The Science Ice Exercise
The Science Ice Exercise (SCICEX) program is a collaboration between the U.S. Navy and the marine research community to utilize nuclear-powered submarines for the study of the Arctic Ocean. Unlike surface ships, submarines have the unique and valuable ability to operate and take measure... | <urn:uuid:35731472-1dcc-46bf-b0fe-af2221e9d855> | 3.3125 | 336 | Knowledge Article | Science & Tech. | 35.017282 |
It actually is providing an image, you just cannot see it because of contrast. The light you have in the picture is flooding the room with enough ambient light that the image that is actually formed has no contrast.
- Pinhole camera image quality heavily depends on the pinhole size.
However, the smaller the pinhole, th... | <urn:uuid:6601f20f-3519-457a-ab29-6b647fc5d749> | 3.046875 | 316 | Q&A Forum | Science & Tech. | 60.667539 |
If we are travelling with the speed of light, can we see whats behind us(like if we are moving away from earth can we able see the earth)? And how we see the things that we are approaching with speed of light? Does the things look like fast forwarding because we are moving and the source also sending photons with the s... | <urn:uuid:eb755ffb-3005-4196-b72f-f26e0f3e063d> | 3.09375 | 641 | Q&A Forum | Science & Tech. | 60.299174 |
Regular Expressions, Part 2
September 18, 2009
In the previous exercise, we decided on an intermediate representation for regular expressions and wrote a parser that produces the intermediate representation corresponding to a regular expression given as input.
Your task today is to write the corresponding matcher that ... | <urn:uuid:64f98322-d1c0-46b0-9472-2d18e9a017c7> | 2.96875 | 144 | Personal Blog | Software Dev. | 21.555457 |
One-way ticket to Mars
Posted on Aug 22, 2012 in Science
Amid the commotion and celebration of the successful landing of NASA’s Curiosity rover on Mars last week, a small group of entrepreneurs outside of the United States is already planning for the next giant leap — sending humans to Mars.
The Dutch-based Mars One pr... | <urn:uuid:1d2e21c0-4ba7-4e32-90ca-8eab7aab58a0> | 3.109375 | 697 | Truncated | Science & Tech. | 59.367464 |
This is an introduction to developing Jython, just to get someone started. It doesn't cover the source code in any depth or discuss the design behind Jython. It's purely aimed at getting a development environment set up. It's definitely not complete so feel free to make it better!
Check out a copy of the Jython source ... | <urn:uuid:1b3b4824-f0c0-4344-98cf-6f39322ae096> | 2.6875 | 1,433 | Documentation | Software Dev. | 42.135325 |
Satellite View Selection
11:30 AEST on Friday 24 May 2013 | Cloud/surface composite, Australia
Images from Japan Meteorological Agency satellite MTSAT via Bureau of Meteorology.
Australian Government Bureau of Meteorology
National Meteorological and Oceanographic Centre
Satellite Notes for the 1800UTC chart on 24 May 2... | <urn:uuid:8954f803-3083-458a-b9d0-92930ef47c9e> | 2.984375 | 221 | Knowledge Article | Science & Tech. | 46.181676 |
These documents are part of a technical report series on conservation projects funded by the Critical Ecosystem Partnership Fund (CEPF) and the Conservation International Pacific Islands Program (CI-Pacific). The main purpose of this series is to disseminate project findings and successes to a broader audience of conse... | <urn:uuid:dd56e1b5-6546-447e-870b-dfd70cfd0a89> | 3.171875 | 541 | Knowledge Article | Science & Tech. | 23.698712 |
Specifications have become essential reading for anyone who wants to develop front-end
web sites properly using the newest and most brilliant features available to them
today. This article will hopefully give you a clue as to which one (of several)
to look at when learning about HTML5 and why it should help you; One of... | <urn:uuid:693ed578-6191-4c63-9bad-c3fed926a3d3> | 2.90625 | 899 | Tutorial | Software Dev. | 40.738166 |