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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Wood borers are highly specialised animals which penetrate wooden structures such as boats, wharves, jetties, driftwood and even living mangrove trees. Many can digest the wood owing to cellulose-digesting bacteria or protozoa living in their guts. Only a few species can actually produce their own cellulose-digesting e... | <urn:uuid:0a179f92-79cb-4064-a794-8274c46fbcd0> | 3.828125 | 337 | Knowledge Article | Science & Tech. | 50.36159 |
Prove $0! = 1$ from first principles
Why does 0! = 1?
All I know of factorial is that x! is equal to the product of all the numbers that come before it. The product of 0 and anything is 0, and seems like it would be reasonable to assume that 0! = 0. I'm perplexed as to why I have to account for this condition in my fac... | <urn:uuid:45979943-783c-4eee-9b7d-5a054ea47384> | 3.109375 | 96 | Q&A Forum | Science & Tech. | 90.82414 |
Gravitational Lensing and Number of Images
Why does "Einstein's Cross" (found in the constellation
Pegasus) have four outer points? I understand the concept of
gravitational lensing but why 4 points? what not 3 or 5? Or is this
just a chance occurrence? Would it have anything to do with the
amount of arms the galaxy ha... | <urn:uuid:e699b180-30e0-46f0-aaab-f3e4c886c292> | 3.3125 | 305 | Q&A Forum | Science & Tech. | 56.372458 |
Twentieth-century science completely overturned our view of cosmology. We now know that our solar system is one of many in our galaxy, and our galaxy is one of many in the universe. These galaxies are spread throughout space in a nearly uniform distribution, and distant galaxies are mutually moving apart from each othe... | <urn:uuid:a2023bc3-851d-45c0-9e7d-9bf142aad133> | 3.96875 | 397 | Truncated | Science & Tech. | 28.321532 |
May 23, 2006 > TechKnow Talk
by Todd Griffin
Is glass a liquid or a solid? A very old window, like hundreds of years old, is thicker at the bottom than the top. This proves that glass is a liquid, right? It just flows very, very slowly.
When the TechKnow Guy was in high school (and dinosaur meat was on the cafeteria me... | <urn:uuid:f43e3cdd-5a0e-4605-859f-9f437f16cc2d> | 3.59375 | 1,318 | Comment Section | Science & Tech. | 49.579995 |
The Maldives have become a symbol of the dangers of global warming, amid fears the low-lying nation could disappear as a result of rising sea levels. But one team of scientists believes the truth is more complicated. The Maldives coral islands, they postulate, may be growing with the rising waters...More discussion and... | <urn:uuid:af441fa1-8413-41be-aa96-32105e36265c> | 2.984375 | 197 | Personal Blog | Science & Tech. | 39.645438 |
The pattern of seasonal temperature odds across Australia is due to higher
than average temperatures in both the Pacific and Indian Oceans, with the effect
from the Pacific being dominant.
Averaged over the coming three months, the chances are mainly between 60 and
80% for higher than normal maximum temperatures northe... | <urn:uuid:6fbfb55a-d91d-443d-b835-580b73e29134> | 2.875 | 434 | Knowledge Article | Science & Tech. | 43.75875 |
The interior of the Earth is hot, mainly from energy released by decay of radioactive elements. In some places on the planet, the crust is either thin enough or fractured enough that some of that heat comes close to the surface. Geothermal electricity is created by using this heat to run turbines.
On paper, geothermal ... | <urn:uuid:cc40b841-7991-4048-972f-fd1d2b6de33d> | 4.15625 | 998 | Knowledge Article | Science & Tech. | 37.041872 |
> Climate Change
> Climate Change 101
The ABCs of Climate Change
What is the greenhouse effect?
The “greenhouse effect” is a natural occurrence. Energy from the sun passes through the atmosphere and is absorbed by the Earth’s surface - some of that energy is then emitted back to the atmosphere as heat. A portion of the... | <urn:uuid:836428fa-4f20-4829-9aa0-cf6bc1a2f992> | 3.984375 | 310 | Knowledge Article | Science & Tech. | 40.203775 |
Computation is the fire in our modern-day caves. By 2056, the computational revolution will be recognised as a transformation as significant as the industrial revolution. The evolution and widespread diffusion of computation and its analytical fruits will have major impacts on socioeconomics, science and culture.
Withi... | <urn:uuid:513bf32c-5c35-4852-aff4-926b1d73cadb> | 3.203125 | 212 | Truncated | Science & Tech. | 25.644934 |
Motion Characteristics for Circular Motion
Improve your problem-solving skills with problems, answers and solutions from The Calculator Pad.Flickr Physics
Visit The Physics Classroom's Flickr Galleries and enjoy a visual overview of the topic of circular motion.
The Uniform Circular Motion activity from the Shockwave S... | <urn:uuid:485f894f-62c2-4c89-aa51-39cd09429731> | 4.3125 | 1,559 | Tutorial | Science & Tech. | 48.48425 |
JTable Display Data From MySQL Database
This section will describe you the displaying of data of a database table into a JTable. Here you will read about how to create a table in Java swing, how can you add column header's name, how can you show data into the table..
clone method in Java
clone() method in Java is used ... | <urn:uuid:9bf56eeb-f77d-44f5-86f8-0d1074df8c14> | 3.5625 | 2,124 | Content Listing | Software Dev. | 59.77635 |
There are different types of Numbers
in the number system. Perfect Numbers
are one of such types. The perfect number is a positive number whose factors when added give back the number as answer. The factors of the numbers are less than the number.
Some examples of perfect numbers are given below:
1. The factors of numb... | <urn:uuid:c2fc4699-65c6-4853-8715-b1667acab1fc> | 3.515625 | 290 | Tutorial | Science & Tech. | 69.239211 |
Satellite images indicate the moisture in the atmosphere over a given location.
The moisture can indicate one of two things: clouds or fog.
There are different types of satellites.
The ones most frequently used in our weather center are visible satellites and infrared satellites.
Visible satellites are pictures from sp... | <urn:uuid:c2219f60-4caa-4f8c-8dc2-16576cd170d8> | 3.265625 | 91 | Knowledge Article | Science & Tech. | 26.25991 |
XGetErrorText(display, code, buffer_return, length)
int (*handler)(Display *);
XGetErrorDatabaseText(display, name, message, default_string, buffer_return,
char *name, *message;
The XGetErrorText function copies a null-terminated string describing the specified error code into the specified buffer. The returned text is... | <urn:uuid:41eda461-2b3b-4421-9350-89ccc48860be> | 2.78125 | 436 | Documentation | Software Dev. | 34.426579 |
Vulture Roosting Behaviors
By Phil Miller, Wildlife Biologist, Wildlife and Freshwater Fisheries Division
Vultures are some of the most common species of birds found in Alabama and throughout the southeast. Vultures commonly seen in the Southeast are classified as one of two species, the turkey vulture (Cathartes aura)... | <urn:uuid:780553ea-e67a-45c8-8ed5-c024f56ba080> | 3.875 | 668 | Knowledge Article | Science & Tech. | 47.397788 |
Study Will Explore How Solar Storms Affect Earth’s Atmosphere
UMass Lowell, 4th January 2013
We all rely on local weather forecasts to plan our travels and outdoor activities, or even to decide whether to water the lawn.
But researchers like Prof. Paul Song in the Department of Physics & Applied Physics are also intere... | <urn:uuid:250666d4-3d11-4c59-beb5-59d085d85a59> | 3.015625 | 1,757 | Content Listing | Science & Tech. | 38.294141 |
Glenn Chaple's observing basics: Blinded by the moonlight
December 2005: Bright moonlit skies hide fainter meteors, diminishing the visual impact of these cosmic fireworks.
December 1, 2005
|Would you attend a Fourth of July fireworks display if it were held at midday? Probably not. The midday Sun would all but obliter... | <urn:uuid:a8d19505-fb63-4aee-acb3-446e23d136dd> | 3.046875 | 281 | Truncated | Science & Tech. | 43.66716 |
Data Type Tips
The reserved words
smallint are a few names, taken from only two programming languages, that indicate a two-byte signed integer.
The names and storage mechanisms for various kinds of data have become as varied as the colors of leaves in New England in the fall. This really isn't so bad if you spend all y... | <urn:uuid:6f06b2fd-2622-4760-8554-10b0aae16d0d> | 3.53125 | 721 | Knowledge Article | Software Dev. | 27.55854 |
Scientific Assessment of Ozone Depletion: 2002
The 2002 WMO/UNEP assessment, Scientific Assessment of Ozone Depletion: 2002, contains the most up-to-date understanding of ozone depletion at the time and reflects the thinking of 275 international scientific experts who contributed to its preparation and review. Co-chair... | <urn:uuid:7daabc76-a2b6-4bbe-a045-09e441894f4c> | 2.734375 | 1,085 | Knowledge Article | Science & Tech. | 29.390418 |
Use this grid to shade the numbers in the way described. Which
numbers do you have left? Do you know what they are called?
Work out Tom's number from the answers he gives his friend. He will
only answer 'yes' or 'no'.
Use cubes to continue making the numbers from 7 to 20. Are they sticks, rectangles or squares?
Can you... | <urn:uuid:bfeb29f8-d385-4f94-b4a7-c761f1483522> | 3.5 | 331 | Tutorial | Science & Tech. | 71.757906 |
This week’s visual illusion is related to Mach bands, and similar in some ways to the watercolor effect. It’s called the Craik-O’Brien-Cornsweet effect (or just the Cornsweet effect)1. This is the best example I’ve ever seen (from here):
What you should see is a dark square over a light square (almost white). Now take ... | <urn:uuid:f6b375b4-e1a8-4798-9f68-627895cb6f82> | 3.71875 | 1,073 | Personal Blog | Science & Tech. | 53.387467 |
From Erlang Community
Matthias Lang, with important ideas from Brian Zhou
Why Cross Compile
Cross compiling means using one type of system to compile the Erlang runtime system for a different type of system. A typical example would be using an x86-based linux system to compile Erlang for an embedded MIPS CPU.
You usual... | <urn:uuid:66ba41e8-733b-4bb6-be7a-2d366c8fe835> | 3.34375 | 1,520 | Tutorial | Software Dev. | 55.967516 |
The Medieval Warm Period in Greenland
Vinther, B.M., Jones, P.D., Briffa, K.R., Clausen, H.B., Andersen, K.K., Dahl-Jensen, D. and Johnsen, S.J. 2010. Climatic signals in multiple highly resolved stable isotope records from Greenland. Quaternary Science Reviews 29: 522-538.
Working with 20 ice core records from 14 diff... | <urn:uuid:f098cf46-1065-4445-b96e-78dd40a3b901> | 3.546875 | 434 | Academic Writing | Science & Tech. | 46.797285 |
Build a solid foundation in science, formulation and product development—find out more!
Most Popular in:
Comparatively Speaking: Arrow Symbols in Organic Chemistry*
By: Anthony J. O'Lenick Jr., Siltech LLC; and James Ashenhurst, PhD,
Posted: September 25, 2012
There are eight different types of arrows encountered in or... | <urn:uuid:1c09fe32-a8f9-426a-bb2b-86c4fb511e90> | 3.765625 | 540 | Knowledge Article | Science & Tech. | 47.732002 |
Following up on earlier theoretical predictions, MIT researchers have now demonstrated experimentally the existence of a fundamentally new kind of magnetic behavior, adding to the two previously known states of magnetism.
Ferromagnetism — the simple magnetism of a bar magnet or compass needle — has been known for centu... | <urn:uuid:28215da7-450d-4f95-ad17-91a20212a66a> | 3.046875 | 1,048 | Truncated | Science & Tech. | 36.163308 |
Our "NanoTube" collection of informative and noteworthy videos
in the areas of nanosciences and nanotechnology
The world's smallest smiley
This atomic smiley is written on a Ag(111) surface by manipulating individual silver atoms extracted from the native surface with the STM-tip. It has a radius of 18 nm. It is probab... | <urn:uuid:29e00745-3f99-4199-ac76-04902c07a02f> | 2.96875 | 161 | Truncated | Science & Tech. | 40.179286 |
South American Coati, Nasua nasua
The South American coati (Nasua nasua), also known as the ring-tailed coati, is native to South America. Its range is large and includes lowland tropical and subtropical habitats. The only South American country where this species does not occur is Chile. It can be found at elevations ... | <urn:uuid:dab26050-2c9f-45c8-b3e5-2fecdfbf9525> | 3.765625 | 559 | Knowledge Article | Science & Tech. | 50.958333 |
May 6, 2002 Astronaut photography of the Earth from the International Space Station has achieved spatial resolutions of less than six meters, an analysis of more than 13,000 images has shown. This means scientists can use photographs taken from the space station to study changes that are occurring in very small feature... | <urn:uuid:b3f3fa1d-5b7d-4923-bd98-c3bbb0241dc9> | 3.875 | 489 | Truncated | Science & Tech. | 36.442222 |
News Stories relating to "asteroid"
Monday, April 15, 2013
NASA plans to robotically capture a small near-Earth asteroid and redirect it safely to a stable orbit in the Earth-moon system where astronauts can visit and explore it. Is this part of NASA's search for potential "killer" asteroids?
At a recent Congressional ... | <urn:uuid:a8d21fa5-75cf-4d36-8c6d-c3b67cd20ae1> | 3.140625 | 1,762 | Content Listing | Science & Tech. | 64.756568 |
The United States has been a space-faring nation for just over 50 years, ever since Alan Shepard's suborbital pop shot aboard Freedom 7 on May 5, 1961. In the following eight years, the US, and mankind, went from being earthbound to making the first lunar landing.
Projects Mercury, Gemini, and Apollo were followed by t... | <urn:uuid:3cac1373-05f0-49db-a2f1-f003e8d4f9f0> | 3.59375 | 1,317 | Knowledge Article | Science & Tech. | 46.361382 |
Describe the phenomenon of natural radioactive decay
Describe alpha, beta and gamma radiation and their properties
In the same way that a rock at a top of hill is not stable and has “too much” potential energy and “wants” to get rid of it by rolling down the hill, the nucleus of an atom can become unstable, essentially... | <urn:uuid:4d4fd5ba-c69b-4a99-a27f-0653c92f07ef> | 4.125 | 1,776 | Content Listing | Science & Tech. | 44.553155 |
Rust, Steel, Heat, and Magnetism
We rusted some steel wool with bleach and vinegar as
catalyst. We removed the wool and drained the liquid through a coffee filter. We
tested the dried residue, which was no longer magnetic. We then heated it in a
spoon over a candle flame, which turned it black. It was magnetic
again. W... | <urn:uuid:76513ac1-8b1e-4375-90c0-d8f8abdc7866> | 3.125 | 526 | Q&A Forum | Science & Tech. | 53.192176 |
Learn to Forecast
By Tiffany Means, About.com Guide
Weather maps are a visual way of communicating weather information at-a-glance. Knowing how to read them is an important forecasting skill.
- Weather Map Symbols
- Weather Fronts
- High Pressure Systems
- Low Pressure Systems
- Isobars - Lines of Constant Pressure
Bef... | <urn:uuid:13aef15b-96bb-439d-b83e-fe0874e9af0c> | 3.375 | 127 | Tutorial | Science & Tech. | 43.434239 |
Where on Earth...? MISR Mystery Image Quiz #17
Here's another chance to play geographical detective! This natural-color image from the Multi-angle Imaging SpectroRadiometer (MISR) represents an area of about 372 kilometers x 425 kilometers, and was captured by the instrument's vertical-viewing (nadir) camera in Decembe... | <urn:uuid:cb790996-c716-4723-89f2-e671148cf6b8> | 3.828125 | 1,273 | Q&A Forum | Science & Tech. | 55.551239 |
Rainbow-tinted slicks and globules of oil have been cropping up in the Gulf of Mexico during the past 10 days or so, and it’s not clear where it is all coming from. BP, whose Macondo well spewed 4.1 million barrels of oil into the Gulf last summer after the Deepwater Horizon disaster, has denied that the oil is coming ... | <urn:uuid:102d18d2-9e8e-4fa0-8eae-41022c4863d2> | 3.0625 | 491 | Content Listing | Science & Tech. | 64.382075 |
- Jul 10, 2008 Definition and other additional information on Peripatric speciation from Biology- Online.org dictionary.
- PERIPATRIC SPECIATION DRIVES DIVERSIFICATION AND
- PERIPATRIC SPECIATION IN REEF HERMITS. Jokiel and Martinelli 1992).
- Are there species – and why?
- SPECIATION / EVA KISDI / 2010 FALL / LECTURE ... | <urn:uuid:f20f7239-151e-415e-987d-554339376c4c> | 2.71875 | 446 | Content Listing | Science & Tech. | 20.06576 |
Ionizing radiation enters the detector chamber and ionizes the mixture of gas in it. The electrons drift towards the positive electrode and ions move towards the negative electrode. Thus, ampere meter detects a current.
The number of ion pairs is proportional to the number of ionizing particles entering the detector ch... | <urn:uuid:1eeda502-4a11-4b47-bcfa-98923b523a39> | 3.921875 | 1,258 | Knowledge Article | Science & Tech. | 39.7252 |
Science Fair Project Encyclopedia
Pheromone (honey bee)
Honey bee pheromones (Greek:“carrier of excitement”) are chemical substances released by individual bees into the hive or environment, which cause changes in the physiology and behaviour of other bees. Pheromones may be volatile or non-volatile. The pheromones are... | <urn:uuid:f7205931-4316-4837-b691-60a8ae4eddc9> | 3.765625 | 1,453 | Knowledge Article | Science & Tech. | 44.281991 |
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.
February 11, 1997
Explanation: Astronaut Carl Walz waves at his colleagues from the aft end of the Space Shuttle Discovery's payload bay - during a ... | <urn:uuid:3b1be234-f565-43b6-a2dd-8d00a04f08fc> | 3.28125 | 245 | Knowledge Article | Science & Tech. | 36.327368 |
Cosmic timeline 08
Simulation of a super-symmetry event (showing leptons and missing transverse energy), with a Higgs particle decaying to two Z particles and to four muons in the full Compact Muon Solenoid detector. The Compact Muon Solenoid (CMS) experiment is one of two large general-purpose particle physics detecto... | <urn:uuid:bac3810d-6d65-411b-b118-bdacd5667466> | 3.859375 | 506 | Knowledge Article | Science & Tech. | 43.760052 |
LocalTime = 41.5 - 2 * (SkyTime + Month)
Tillerman asked the question why is the constant 41.5?
Good question - but I'm not an astronomer, and haven't done these calculations before, but then that is what Wikipedia is for so here goes.
Firstly lets rearrange the equation so the constant which we'll call K (we maths typ... | <urn:uuid:096e805d-b83a-48b2-89f1-03284c8685ec> | 2.921875 | 870 | Personal Blog | Science & Tech. | 74.235144 |
// C_ASSERT() can be used to perform many compile-time assertions: // type sizes, field offsets, etc. // An assertion failure results in error C2118: negative subscript. #define C_ASSERT(e) typedef char __C_ASSERT__[(e)?1:-1]
You might ask: How the hell does it work? Well, as the comments explain, it works by using a n... | <urn:uuid:e955acd0-6347-4d8e-85e9-d54e74c2582e> | 3.390625 | 163 | Comment Section | Software Dev. | 56.896786 |
||This article may require cleanup to meet Wikipedia's quality standards. The specific problem is: among other problems, it uses "we". (December 2007)|
||This article needs additional citations for verification. (July 2007)|
- This article is about artificial seismic sources. For natural seismic sources, see Earthquake... | <urn:uuid:3bda26c8-826a-469e-bfa0-e9697d0a638c> | 3.4375 | 2,036 | Knowledge Article | Science & Tech. | 41.39122 |
The National Climatic Data Center released their monthly state of the climate for July. They note that “Higher-than-average temperatures engulfed much of the contiguous U.S. during July, with the largest temperature departures from the 20th century average occurring across most of the Plains, the Midwest, and along the... | <urn:uuid:813bb489-0b6a-47d6-91c7-105d70fe3a67> | 3.375 | 172 | Personal Blog | Science & Tech. | 57.274378 |
The device model/sysfs "class" subsystem is a mechanism which allows
different kernel subsystems to export device-independent interfaces to user
space. With a recent kernel, a number of interesting class hierarchies
can be found. For example, /sys/class/net
represents all of the
network interfaces in the system, /sys/c... | <urn:uuid:58916509-2206-4d81-9cba-08bcbd37419c> | 2.71875 | 948 | Comment Section | Software Dev. | 45.812842 |
Dr. Paul Stanford departed from our recent lectures on applied mathematics and contest preparation to give our students a glimpse into the fascinating world of pure mathematics. Dr. Stanford is particularly skilled at teaching deep ideas without the need to resort to complex algebra, I’ll attempt in this recap to do hi... | <urn:uuid:b5ef9212-5f78-47fc-84f0-bdc7a887257e> | 3.4375 | 649 | Personal Blog | Science & Tech. | 53.144471 |
Voyagers at the Termination Shock
Data from Voyager 1 and 2 was used to define our solar system's final frontier, a vast region at the edge of our solar system where the solar wind runs up against the thin gas between the stars.
Voyager 2 crossed the heliosheath boundary, called the solar wind termination shock, about ... | <urn:uuid:5d260d3c-786f-4d2b-abef-3e965ad59ceb> | 3.96875 | 341 | Knowledge Article | Science & Tech. | 50.79582 |
Science subject and location tags
Articles, documents and multimedia from ABC Science
Friday, 5 November 2010
A spacecraft has successfully conducted a close fly-by of the comet Hartley 2, providing the most extensive observations of a comet in history.
Thursday, 4 November 2010
StarStuff Podcast Discovery of a neutron... | <urn:uuid:1c5a5050-85fb-4ad7-8c3a-218477d3e23c> | 2.9375 | 616 | Content Listing | Science & Tech. | 42.585316 |
The 29 September 2009 Samoa Islands Tsunami: Simulations Based on the First Focal Mechanism Solutions and Implications on Tsunami Early Warning Strategies
The tsunamigenic earthquake (Mw = 8.1) that occurred on 29 September 2009 at 17:48 UTC offshore of the Samoa archipelago east of the Tonga trench represents an examp... | <urn:uuid:082494df-4059-4c4f-bc19-d9f2ae42f207> | 2.6875 | 296 | Academic Writing | Science & Tech. | 33.812222 |
This article shows how you can install Ruby on Rails (RoR) and integrate it in Apache2 on a Debian Etch system (including a short section at the end showing how to use RoR in a web site created with ISPConfig).
Read it at howtoforge
Ruby on Rails is a web application framework which is rapidly gaining popularity among ... | <urn:uuid:c3486c26-e96a-483d-b573-d6b58cebad9d> | 2.921875 | 124 | Truncated | Software Dev. | 35.102 |
Found from Greenland to South America, the American eel is one of earthís most unique creatures, spending most of its life in freshwater, returning to the ocean to spawn, and undergoing amazing transformations in the process.
In the North Atlanticís Sargasso Sea, fertilized eggs float to the surface and hatch into smal... | <urn:uuid:48ecd105-bd8a-4ed0-bd61-32d347d61b78> | 3.84375 | 263 | Knowledge Article | Science & Tech. | 44.124622 |
EarthNews Radio: Cultural Diversity
When we think of "biodiversity," we generally think about the varying plants and animals on the planet. However, there are different levels of biodiversity, including human cultural diversity.
Jerry Kay spoke to Dr. Healy Hamilton of the Center for Biodiversity Research and Informati... | <urn:uuid:bc38a639-8acc-43b2-8b7c-29be076d5be1> | 3.046875 | 238 | Truncated | Science & Tech. | 26.508986 |
Climate change hitting bird species, shows study
By Madeline Chambers
BONN, Germany (Reuters) - One in eight of the world's birds are at risk of extinction as climate change puts birds under great pressure, a leading conservation group warned on Monday.
The population of rare birds such as the Floreana mockingbird of t... | <urn:uuid:9eb1d963-2813-4a6c-85f8-ce4abf7263ff> | 3.359375 | 632 | Truncated | Science & Tech. | 44.561011 |
m (+See also)
|Line 15:||Line 15:|
Revision as of 05:58, 15 November 2011
Kinds classify types. Kinds are to types and type-constructors what types are to values.
Ordinary types have kind *. Type constructors have kind P -> Q, where P and Q are kinds. For instance:
Int :: * Maybe :: * -> * Maybe Bool :: * a -> a :: * ... | <urn:uuid:f53bf120-c559-4132-bbe9-a811f4a17f3f> | 3.171875 | 144 | Documentation | Software Dev. | 66.74 |
This problem appeared in the Bafflers thread as exercise #2 and has some algebraic solutions.
A ship is sailing on a course from the origin. It follows the path y= 3.14 x. It has a speed of 1 / 3 units per second. A submarine is located at (5,0). The sub knows the ship is oblivious to its existence. The sub would like ... | <urn:uuid:bcec40ed-45d8-437c-9dd9-a972e2ddfd28> | 3.453125 | 564 | Comment Section | Science & Tech. | 95.494185 |
Linear Pair Property,
Congruent Triangles (SAS,
The situation is represented in the diagram below:
|In this example, each of the roads leading up to the intersection is one block
long. We found earlier that the angles opposite each other in the intersection
have equal measure due to the Vertical Angle Theorem. Since th... | <urn:uuid:59a118fe-ce53-43a5-b872-17957cbce57b> | 3.9375 | 265 | Academic Writing | Science & Tech. | 59.083622 |
The following HTML text is provided to enhance online
readability. Many aspects of typography translate only awkwardly to HTML.
Please use the page image
as the authoritative form to ensure accuracy.
Aftershocks are an extreme example of short-term earthquake clustering that appears to be quite distinct from the long-t... | <urn:uuid:f2a7187b-5734-47bd-88fb-6b8bee0ac469> | 3.25 | 558 | Academic Writing | Science & Tech. | 24.699701 |
05.07.13 - Join us on May 7 at 1 p.m. EDT for a video chat with Bill and Linda Hunt. They will answer student questions about NASA's Earth-observing satellites, which are used by scientists to study Earth's atmosphere.
05.05.13 - On the night of May 5, NASA meteor expert Bill Cooke answered your questions about the 201... | <urn:uuid:7379871b-4221-47af-ac3e-bffa1edf1cbc> | 2.75 | 649 | Content Listing | Science & Tech. | 77.921444 |
A version of this piece was originally commissioned by the Richard Dawkins Foundation for Science and Reason and also appears on their website RichardDawkins.net.
Read more: "LHC sees hint of lightweight Higgs boson"
As the world awaits news of the possible discovery of the Higgs boson, there remains a lot of confusion... | <urn:uuid:3b1131d4-6ce4-4062-ba30-6aebede058e7> | 2.921875 | 1,658 | Comment Section | Science & Tech. | 50.069813 |
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Updated at 9:22 pm on 3 August 2010
A census of marine life has found there could be tens of thousands of unidentified marine species in New Zealand's waters.
The census, conducted over a 10-year period, is the largest global research programme to be undertaken on marine biodiversity.
The lead author o... | <urn:uuid:b5a6962f-ea19-4420-b2fa-9ca9ac026c35> | 2.78125 | 280 | Truncated | Science & Tech. | 43.953541 |
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On the morning of January 7, 2010, a bright orange ship, squat and round-bellied, passed the northern tip of the Antarctic Peninsula. The Nathaniel B. Palmer, a 94-meter research icebreaker serving the U.S. National Science Foundation, had chugged southward for three days since leaving port in Punt... | <urn:uuid:78bc5d9d-76f0-48a5-a826-c53362f9b198> | 3.875 | 787 | Truncated | Science & Tech. | 37.678819 |
Green Tree Python
Facts about this animal
This is an arboreal python, with a length of 1,5 - 1,8 m. It has a slender, laterally compressed body. Its head is diamond shaped and as in other pythons, the head scales are irregular, numerous and finely granular. The head also is much wider than and appears disproportional t... | <urn:uuid:76095949-0845-4a6e-8af2-84a66a448899> | 3.9375 | 2,159 | Knowledge Article | Science & Tech. | 43.985994 |
Microformats give us the opportunity to add more machine-readable semantic value to HTML documents using structures with standardized class names.
So more precisely, what are microformats - Microformats? Microformats are a way of thinking about data, design principles for formats, highly correlated with semantic XHTML,... | <urn:uuid:8b620fad-68f1-4f6d-8224-e4295ed6b4d0> | 3.1875 | 559 | Comment Section | Software Dev. | 48.725509 |
Quantum mechanics is a realm of weirdness: electrons being linked to each other even though the vastness of the universe might separate them, things being in two places at once, and, of course, knowledge precluding knowledge. This last is the standard bearer of quantum oddity: measuring the momentum of an object preclu... | <urn:uuid:cdd5ae32-3034-4b6e-b134-0ce5f52b9869> | 3.09375 | 884 | Nonfiction Writing | Science & Tech. | 53.461047 |
Nital is a name and is a solution of alcohol and nitric acid commonly used for routine etching of metals. It is especially suitable for revealing the microstructure of carbon steels. The alcohol can be methanol, ethanol or methylated spirits.
Mixtures of ethanol and nitric acid are potentially explosive. This commonly ... | <urn:uuid:e57a32c2-246e-4e9c-8e96-6974d958df5b> | 2.828125 | 152 | Knowledge Article | Science & Tech. | 35.286154 |
PLANT SCIENCE: Enhanced: The Right Time and Place for Making Flowers -- Blázquez 309 (5737): 1024 -- Science:
Reproductive success in plants depends on the synchronization of flowering within a given species. Many plants have developed a highly complex signaling network that monitors environmental conditions, such as d... | <urn:uuid:52f7cef3-5412-4f0e-ab4f-530cb730a7dd> | 3.21875 | 402 | Personal Blog | Science & Tech. | 38.730208 |
Chromatography is a technique used to isolate the various components of a mixture and this makes its application in analysis of biomolecules very important. It is used to separate and analyse the complex DNA sequences and other compounds, and also the concentration of the samples. There are many types of chromatography... | <urn:uuid:31d668ab-2f30-47d3-8cbb-23a47519bf01> | 3.359375 | 500 | Listicle | Science & Tech. | 20.617326 |
I have a fondness for collecting brain lore–memes about the wonders of the human brain that race around the world for decades. The classic of brain lore is the “ten-percent myth.” As I wrote here, people often claim we only use ten percent of our brain, implying that we’d be supergeniuses if we could just switch on the... | <urn:uuid:cdb49bb1-0060-4c43-a534-4c2950c87853> | 2.921875 | 459 | Personal Blog | Science & Tech. | 65.792313 |
projects > impacts of hydrological restoration on three estuarine communities of the southwest florida coast and on associated animal inhabitants
Impacts of Hydrological Restoration on Three Estuarine Communities of the Southwest Florida Coast and on Associated Animal Inhabitants
A primary goal of Everglades restoratio... | <urn:uuid:7592f4b0-aea2-41a3-88e0-bfa41e710b24> | 3.609375 | 341 | Knowledge Article | Science & Tech. | 23.013782 |
The many-eyed Earth watcher
Solve this crossword about Earth. You will know all the answers if you first read the story below about MISR, the multi-eyed Earth watcher and look at the 3-D pictures!
Put the mouse on a numbered square to see the clue. Click if you want to enter the word. For some squares, you may see both... | <urn:uuid:a96173d0-df2e-4d5f-8695-1343c9b9b340> | 3.203125 | 351 | Tutorial | Science & Tech. | 74.294626 |
JRapid applications use a relational database schema as the persistent storage layer. For every entity defined, a database table is created with columns modeling the properties of the entity. In some cases, more than one table is created to represent a special type of relationship with other entity or collection of pri... | <urn:uuid:d7c63a1f-6025-4966-b9a2-76df5097b355> | 2.984375 | 1,483 | Documentation | Software Dev. | 26.623114 |
MammalsMammals are a class of species that regulate their body temperature internally. Except for monotremes, the young are born live and suckle milk from the female. Most have some hair or fur on their body.
Mammal species profiles
Fish & MarineFish are any scaly vertebrate animal that lives in water. Unlike mammals a... | <urn:uuid:88973515-5539-4e09-8ab9-b25f4d0aaa68> | 3.28125 | 169 | Knowledge Article | Science & Tech. | 24.332814 |
Ask a question about 'Sion's minimax theorem'
Start a new discussion about 'Sion's minimax theorem'
Answer questions from other users
Mathematics is the study of quantity, space, structure, and change. Mathematicians seek out patterns and formulate new conjectures. Mathematicians resolve the truth or falsity of conject... | <urn:uuid:ca4606f0-af91-46f9-b46e-54eb7019132d> | 3.484375 | 467 | Q&A Forum | Science & Tech. | 34.003685 |
In 1999, Leonids Meteor Shower came to an impressive crescendo.
Observers in Europe saw a
sharp peak in the number of
meteors visible around 0210
during the early morning hours of November 18.
Meteor counts then exceeded 1000 per hour - the minimum needed to define a
true meteor storm.
At other times and from other loc... | <urn:uuid:8d9c2653-bd41-4161-9eba-2264c7262d8f> | 3.1875 | 182 | Truncated | Science & Tech. | 51.011354 |
“The diffraction barrier responsible for a finite focal spot size and limited resolution in far-field fluorescence microscopy has been fundamentally broken.” With that blunt assessment, published in the Proceedings of the National Academy of Science in 2000, Stefan Hell introduced the world to a “super-resolution” micr... | <urn:uuid:dc4ba108-382e-4fb8-b4ae-ddb3a7c8acc1> | 3.3125 | 890 | Knowledge Article | Science & Tech. | 30.698372 |
In most programming languages, procedures are strongly typed, and any call to the procedure must use the same types that are used in the definition of the procedure. Thus, to reuse someone else's procedure, you must understand the types they use and conform to those types.
With views, you only need to describe how your... | <urn:uuid:11f2c458-088d-44ea-b8cd-d0e1a9d75960> | 3.34375 | 605 | Tutorial | Software Dev. | 41.370218 |
isoprene or 2-methyl-1,3-butadiene (Īˈsəprēn, byōˌtədĪˈēn) [key], colorless liquid organic compound. It is a hydrocarbon, and is insoluble in water but soluble in many organic solvents; it boils at 34°C. The isoprene molecule contains two double bonds. It is readily polymerized by the use of special catalysts; large nu... | <urn:uuid:24948e2b-116a-419a-9bf1-43c43bdae29a> | 3.328125 | 235 | Knowledge Article | Science & Tech. | 26.392308 |
In a study funded by the National Science Foundation, Stephen Rothstein, professor of zoology, and Adrian O'Loghlen, a research scientist in the Department of Ecology, Evolution and Marine Biology, have documented how male brown-headed cowbirds use songs and physical displays to elicit responses from females. Their stu... | <urn:uuid:9800288d-d4b5-4c04-986e-9806bde1faf6> | 4.09375 | 1,180 | Knowledge Article | Science & Tech. | 45.862788 |
PLUTO's status as a planet is in danger. Astronomers have found a similar object more than half Pluto's diameter in the Kuiper Belt, a collection of primordial icy bodies beyond the orbit of Neptune. The object, dubbed "Quaoar", is the biggest thing found in the Solar System since the discovery of Pluto.
Many researche... | <urn:uuid:548b4592-d6de-49d7-92c3-f260d52c38cf> | 3.515625 | 230 | Truncated | Science & Tech. | 56.586442 |
Light-seeking algae might become the workhorses of the next generation of lab-on-a-chip devices, the Materials Research Society meeting in Boston heard last week. Labs-on-a-chip are used for medical and genetic analysis, and typically consist of arrays of microscopic wells containing chemicals that react with any biolo... | <urn:uuid:0ee3f70e-e974-4b06-8e09-e7905df92040> | 2.984375 | 160 | Truncated | Science & Tech. | 41.588476 |
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In the currency of the cosmos, stars come cheap. There are hundreds of billions of them in our galaxy alone. The true prizes, as astronomers have always known, are planets. It took earthly observers millennia to discover the ones circling our own little sun. Whether any existed around other stars remained a mystery unt... | <urn:uuid:b90abf81-b831-4c22-9f22-2294af6bb1ec> | 3.734375 | 537 | Truncated | Science & Tech. | 52.027069 |
Tuesday May 21, 2013
Last week researchers at Oregon Health and Science announced they had made human embryo clones using skin cells. The technique was similar to the one used to clone Dolly, the sheep, almost 20 years ago. Why has it taken so long to clone humans? Are we that different than sheep?
In fact, cloning res... | <urn:uuid:181e13ad-778f-4d17-87f1-d25273213e19> | 3.640625 | 1,920 | Content Listing | Science & Tech. | 38.299282 |
We begin building a LabVIEW application by creating a blank virtual instrument (VI) using, for example, the Blank VI option on LabVIEW’s Getting Started splash screen. This brings up two windows: a front panel and a block diagram. The former contains the user interface of the VI which the user creates using controls an... | <urn:uuid:cc189d1a-a646-4a93-aa5c-51c3d565de19> | 2.78125 | 1,186 | Documentation | Software Dev. | 48.649226 |
Madin, K.
"Turtle skulls prove to be shock-resistant
Oceanus, vol. 47, issue 2, Woods Hole, Massachusetts, Woods Hole Oceanographic Institution, pp. 36-37, 09/2009.
Scientists and engineers from Woods Hole Oceanographic Institution (WHOI) and the U.S. Navy have discovered that sea turtles’ skulls and shells not only pr... | <urn:uuid:ba20c76e-be84-4481-8980-5acf5d274fed> | 2.703125 | 124 | Academic Writing | Science & Tech. | 48.581364 |
September 19, 2011
It is believed California is currently undergoing desertification. The long-term impacts and environmental costs associated with this process will take a devastating toll on the environmental future of the state. According to an article from Remote Sensing by Doris Lam, Tarmo Remmel and Taly Drezner,... | <urn:uuid:bcc660a7-f3a9-47f6-b17f-11ab104b432b> | 4.03125 | 793 | Academic Writing | Science & Tech. | 22.776521 |
The Global Positioning System has completely revolutionised how geologists study the deformation of the Earth. If you leave a GPS receiver in a fixed location for days, months and years, it is precise enough to measure motions on the mil...
The Global Positioning System has completely revolutionised how geologists stud... | <urn:uuid:5d29fdf9-a92a-45bf-a21e-2b5f2e3b05c1> | 3.703125 | 921 | Nonfiction Writing | Science & Tech. | 47.42743 |
When number pyramids have a sequence on the bottom layer, some interesting patterns emerge...
Imagine we have four bags containing numbers from a sequence. What numbers can we make now?
A little bit of algebra explains this 'magic'. Ask a friend to pick 3 consecutive numbers and to tell you a multiple of 3. Then ask th... | <urn:uuid:ac28a887-4a55-4dee-ae15-f49f67e45639> | 3.421875 | 1,744 | Content Listing | Science & Tech. | 74.996376 |
A proposal for obtaining optical resolution better than the classical limit by means of spatially entangled quantum states of light opens a new frontier in the fields of quantum optical imaging, metrology, and sensing.
The blurring effects of diffraction pose an obstacle to transmitting an image with all-optical techno... | <urn:uuid:b1fb6ccf-9325-4a97-96e5-15c1d6ade090> | 3.421875 | 254 | Content Listing | Science & Tech. | 33.498696 |
Major Section: BOOKS
A book, say
"arith", is said to have a ``certificate'' if there
is a file named
"arith.cert". Certificates are created by the
certify-book and inspected by
sums are used to help ensure that certificates are legitimate and
that the corresponding book has not been modified since
certification. But be... | <urn:uuid:5f2a6bdc-8b03-491c-9ea5-9e8896e590ad> | 2.984375 | 851 | Documentation | Software Dev. | 35.933332 |
SQL Server Certificates and Asymmetric Keys
Public Key Cryptography (PKI) is a form of message secrecy in which a user creates a public key and a private key. The private key is kept secret, whereas the public key can be distributed to others. Although the keys are mathematically related, the private key cannot be easi... | <urn:uuid:fd7921bb-d21b-444d-b751-7e68c1a339ac> | 3.765625 | 753 | Documentation | Software Dev. | 32.560507 |
abstract class sys::Obj
Obj is the root class of all classes.
Return a negative integer, zero, or a positive integer if this object is less than, equal to, or greater than the specified object:
this < that => <0 this == that => 0 this > that => >0
3.compare(8) => -1 8.compare(3) => 1 8.compare(8) => 0 3 <=> 8 => -1 // ... | <urn:uuid:92edab53-3576-4301-aef5-4b3b6d771897> | 3.703125 | 665 | Documentation | Software Dev. | 65.307609 |
Tomorrow is National DNA Day, in commemoration of the 1953 discovery of the molecule’s double helix structure and the 2003 completion of the Human Genome Project. But while the focus of the government-conceived holiday is on the DNA of one familiar species, homo sapiens, there are some other genomes worth considering o... | <urn:uuid:6b24a47f-4894-4f4a-afb8-dbfe3131e227> | 3.34375 | 450 | Personal Blog | Science & Tech. | 28.786572 |
Pot beetle (Cryptocephalus primarius)
|Size||Female length: 6-8 mm|
Male length: 5-7 mm
Classified as Endangered in the UK.
This rather shiny beetle (one of the larger Cryptocephalus species) has orange wing-cases (elytra), each with five black spots. The head and thorax are shining black. Both sexes have black legs an... | <urn:uuid:1f90ee36-1f1f-405e-9d10-1ada9ef93999> | 3.046875 | 535 | Knowledge Article | Science & Tech. | 45.532102 |
partitionArticle Free Pass
partition, in mathematics and logic, division of a set of objects into a family of subsets that are mutually exclusive and jointly exhaustive; that is, no element of the original set is present in more than one of the subsets, and all the subsets together contain all the members of the origin... | <urn:uuid:00a1868d-52f3-49a2-8519-a6e2e568089e> | 3.609375 | 193 | Knowledge Article | Science & Tech. | 60.189865 |
TED Talks series, FILMED JUL 2009 • POSTED SEP 2009 • TEDGlobal 2009
Photographer James Balog shares new image sequences from the Extreme Ice Survey, a network of time-lapse cameras recording glaciers receding at an alarming rate, some of the most vivid evidence yet of climate change.
To demonstrate how photography can... | <urn:uuid:97a8db1e-7a1a-4956-87f6-8d696a72b571> | 2.859375 | 203 | Truncated | Science & Tech. | 22.503 |
Loess is fine-grained material that has been transported and deposited by the wind. The sediments come from glacial outwash plains, where glaciers deposit fine particles of silt and clay, or from desert areas that have little vegetation to anchor small particles. Prevailing wind patterns blowing across these environmen... | <urn:uuid:63df1a0c-2ee1-440f-a262-48dd445caf87> | 4.03125 | 97 | Truncated | Science & Tech. | 45.928333 |
My Saved Article
|Atomic Number:||36||Atomic Symbol:||Kr|
|Atomic Weight:||83.80||Electron Configuration:||2-8-18-8|
|Melting Point:||-157.2oC||Boiling Point:||-153.4oC|
History(Gr. kryptos, hidden) Discovered in 1898 by Sir William Ramsay
and M.W. Travers of Britain, in the residue left after liquid air had nearly
Sou... | <urn:uuid:1e7bc841-cd36-47d0-9863-4e4212be5fff> | 3.53125 | 627 | Knowledge Article | Science & Tech. | 47.315688 |