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Earth today is one of the most active planets in the Solar System, and was probably even more so during the early stages of its life. Thanks to the plate tectonics that continue to shape our planet's surface, remnants of crust from Earth's formative years are rare, but not impossible to find. A paper published in Natur... | <urn:uuid:dd000837-a58a-4661-8455-0271ba182b66> | 3.9375 | 210 | Content Listing | Science & Tech. | 65.541274 |
Can you devise a fair scoring system when dice land edge-up or corner-up?
Can all but one square of an 8 by 8 Chessboard be covered by
Given that ABCD is a square, M is the mid point of AD and CP is
perpendicular to MB with P on MB, prove DP = DC.
I noticed this about streamers that have rotation symmetry : if
there wa... | <urn:uuid:529d920a-c4a6-44b0-8e5e-e1417e0da64e> | 2.78125 | 1,051 | Content Listing | Science & Tech. | 60.73655 |
View Latest Questions
Old and New Vector Methods
The Vector class was updated to implement the List interface..
Java Notes: Vectors
To Create a Vector.
An ArrayList can be traversed using either iterators or indexes..
An ArrayList has methods for inserting, deleting, and searching.. | <urn:uuid:3e185e0c-1665-4229-a996-fdefabc83d47> | 2.921875 | 63 | Content Listing | Software Dev. | 46.636818 |
Unit of power in the SI unit system. 1 Watt = 1 Joule per second.
A very dense star with a mass below 1.4 solar masses that is no longer burning nuclear fuel. The Sun will one day evolve into a white dwarf with a diameter of 10 000 km.
Periodic comet which orbits the Sun once every 5.45 years. Discovered in 1948 at the... | <urn:uuid:5d36c921-c366-4b80-a14b-c5d2d32c0879> | 3.375 | 198 | Structured Data | Science & Tech. | 78.703924 |
David J. Flaspohler, an avian ecologist and conservation biologist at Michigan Technological University, writes from Hawaii, where he is studying the influence of human activities on birds and the natural ecosystems that support them.
Tuesday, May 22
One of the great pleasures of learning bird songs comes in the drowsy... | <urn:uuid:8b7e4453-8c86-4749-ab1e-4e3e6f0220d8> | 3.109375 | 1,209 | Nonfiction Writing | Science & Tech. | 46.917827 |
First, "unit" is intentionally vague. It could be a class, a function, a module or a package. It's "unit" of code. Anything could be considered a "unit".
Second--and more important--the extensive mocking isn't fully appropriate for Python programming. Mocks are very helpful in statically-typed languages where you must ... | <urn:uuid:b688e442-b91c-4fcc-9040-36197e948e4b> | 2.84375 | 723 | Personal Blog | Software Dev. | 47.199073 |
The Origin of a Land Flora
Simply begin typing or use the editing tools above to add to this article.
Once you are finished and click submit, your modifications will be sent to our editors for review.
discussed in biography
The precise algal origin of land plants has yet to be ascertained, but questions raised by Bower... | <urn:uuid:d47815ad-abbf-4d4a-8023-e64272d60a93> | 3.109375 | 165 | Truncated | Science & Tech. | 59.987894 |
1. What is the Definition of an Earthquake?
An earthquake is the sudden, sometimes violent movement of the
surface from the release of energy in the earth's crust.
2. What Causes Most Earthquakes?
The crust of the earth when it is subject to tectonic forces, bends
slightly. But, because the crust is rigid, when the str... | <urn:uuid:381ce5ec-5210-4c88-a65f-010c252d56d3> | 3.53125 | 2,646 | Content Listing | Science & Tech. | 51.772441 |
Over fifty years ago, a supernova was discovered in M83, a spiral galaxy about 15 million light years from Earth. Astronomers have used NASA's Chandra X-ray Observatory to make the first detection of X-rays emitted by the debris from this explosion.
Named SN 1957D because it was the fourth supernova to be discovered in... | <urn:uuid:5b4d3117-75fd-4728-9165-d73f0d976ffb> | 3.671875 | 787 | Knowledge Article | Science & Tech. | 42.963761 |
Waves, Nearshore Currents, and Tides
Energetic storm-generated winter waves at La Jolla, CA. Waves move sand on, off, and along the shore. These waves can strip beaches of sand during winter.
Photographer - Memorie Yasuda, image used with permission.
ost energy in nearshore waters comes from wind-generated waves and ti... | <urn:uuid:ef2c1a3c-b14a-4203-97d4-8f6933568ba4> | 3.8125 | 1,159 | Knowledge Article | Science & Tech. | 48.014507 |
Environment: Win32, MSVC 6.0, STL
Sometimes it is necessary to create XML files from a program in C++. It is possible to use the very powerful set of IXMLDOMxxx interfaces, but this may add unnecessary requirements and overhead to the program. On the other hand, to create XML files from code is not a trivial task in th... | <urn:uuid:efeacc9d-b85f-48b8-9c50-4c27d9cf01d7> | 2.984375 | 805 | Documentation | Software Dev. | 45.61656 |
Little-wing pearly mussel
Description: The little-wing pearly mussel is small, not exceeding 1.5 inches in length and 0.5 inches in width. The shell’s outer surface is usually eroded, giving the shell a chalky or ashy white appearance. When the outer surface is intact, it’s light green or dark yellowish brown with dark... | <urn:uuid:065f4604-6b5e-42b9-85bb-dce13ae98371> | 3.671875 | 1,402 | Knowledge Article | Science & Tech. | 35.194443 |
What is the status of benthic invertebrate communities in the open Baltic Sea?
The benthic invertebrate community of the entire Baltic Proper, from the Bornholm Basin to the northern Baltic Proper and the Gulf of Finland, was in a severely disturbed state during the period 2003-2007.
The status of benthic invertebrate ... | <urn:uuid:3973c5c5-4945-42de-8374-c5a2bd7e6f73> | 2.859375 | 732 | Academic Writing | Science & Tech. | 36.244961 |
|Fighting Forest Fires|
|Thursday, 06 September 2007 06:28|
One of the key factors in fighting forest fires is the ability to predict the spread of the fire. Human experience and empirical spread models provide important tools, but they are not always accurate enough. In particular, they are often inadequate for large,... | <urn:uuid:a3b213ea-38ec-4465-ab57-6f011c2485a5> | 3.53125 | 641 | Knowledge Article | Science & Tech. | 33.558083 |
In this chapter I want to teach you the method to create 2D landscapes I used in my game Castles. Again, I won't talk about the Main class, which controls the applet in general and I won't talk about the Stars class, that paints the stars in the background. But both classes are pretty simple, so I think it will be no p... | <urn:uuid:ec7cffca-381a-43c8-8a01-86a60ac6338a> | 3.515625 | 1,390 | Tutorial | Software Dev. | 56.454358 |
Magnetism and CRT's
I am doing a simple science project with my son. I accidently waived a magnet by a
CRT screen and saw the magnetic fields in colors. I want to do this experiment at the school
along with a 4th grade explanation on the reaction between screen and magnet. Can you help?
On a CRT, the picture is drawn b... | <urn:uuid:e93b223c-c7d2-4a09-9fa7-47075a0452c3> | 3.796875 | 367 | Q&A Forum | Science & Tech. | 55.857945 |
It’s never been this hot in the United States.
We just finished the hottest year on record. For the contiguous United States, the 12 months between July 2011 and the end of June marked the hottest year since record keeping began in 1895. Nationally, the average temperature was 56 degrees Fahrenheit -- 3.2 degrees above... | <urn:uuid:393fddde-f1ac-441a-88e6-5b9d6e879dbd> | 3.46875 | 1,572 | Personal Blog | Science & Tech. | 55.295791 |
Posted By Jason Gray on May 19, 2013
The total cost of this sunlit energy was more than $300,000 a kilowatt-1,000 watts, only enough to light ten 100-watt bulbs. Less sophisticated cells intended for earthbound use now cost about $20,000 a kilowatt, still prohibitive except in remote places like offshore oil rigs and i... | <urn:uuid:c662fead-e097-4714-92ca-24c6f3238874> | 2.96875 | 707 | Personal Blog | Science & Tech. | 51.305573 |
Can really smart scientists come down to earth?
Two major Chicago museums now give the general public the chance to observe working scientists in their natural habitat. The Adler Planetarium’s Space Visualization Lab launched in November, and the Field Museum’s DNA Discovery Center debuted last week. But when the last ... | <urn:uuid:53c1cf9a-0b99-4b61-b154-f2673e57bbce> | 2.921875 | 811 | Audio Transcript | Science & Tech. | 65.766792 |
You WIll Probably Live to See 'Dangerous' Levels of Climate Change
As far as Americans are concerned, climate change is a perpetually distant and ambiguous threat. Some glaciers thousands of miles away might melt, some poor people might suffer through droughts in Africa, some polar bears might drown. Et cetera. This 'd... | <urn:uuid:ac183d74-e84a-4f48-ad08-4b42c6a242d5> | 3.03125 | 524 | Nonfiction Writing | Science & Tech. | 34.845455 |
Can Forests Survive Without Birds?
News story originally written on January 30, 2009
Take one species out of an ecosystem and you could see lots of changes in the other living things. This is what is happening in the forests on the western Pacific island of Guam where bird populations have been decimated.
There used to... | <urn:uuid:1db39eea-fdbd-4889-9b08-8d9b5db60080> | 3.46875 | 464 | Truncated | Science & Tech. | 67.459261 |
More on Lake Erie Temperature Trends & Gardening in the Great Lakes
Thursday, I posted about observed water temperature increases at the Buffalo Water Treatment Plant site. To remove the seasonality from the data (and better discern trends), I converted all of the data since 1960 to an annual departure relative to the ... | <urn:uuid:10f4080f-0760-4e62-93a0-7897f2f73fcc> | 2.828125 | 965 | Personal Blog | Science & Tech. | 57.15772 |
The Server Programming Interface (SPI) gives users the ability to run SQL queries inside user-defined C functions.
Note: The available Procedural Languages (PL) give an alternate means to build functions that can execute queries.
In fact, SPI is just a set of native interface functions to simplify access to the Parser,... | <urn:uuid:ca9aa132-0229-4f3d-97c6-df136cb3b915> | 2.6875 | 291 | Documentation | Software Dev. | 37.182156 |
Stephanie Keske does computer visualization work, and is starting a graduate program this fall at Texas A&M University. She told me, “Just living on a ship, I think … you know, I try to be outside as much as I can so just being trapped on a floating hunk of metal is maybe going to be a little difficult. I don’t know: I... | <urn:uuid:e937552c-b587-47db-9d78-862155a929e6> | 2.765625 | 326 | Truncated | Science & Tech. | 59.083887 |
Safety Class
- Very dangerous (Should only be attempted after careful training)
Required Safety Equipment
- The show performer: Glasses / Cryogenic gloves
- Audience/participants: None.
- One brass tube, 5cm across, 40 cm high. This brass tube is closed on one end and open on the other.
- One cork with two holes in i... | <urn:uuid:5728eaff-ec7f-4aff-a3e9-31e88e423742> | 3.046875 | 596 | Tutorial | Science & Tech. | 51.182999 |
Still remember the Interpreter example? No matter what you type is a number or an expression; it can calculate the result just by the clause” new GeneralExpression(inputText.text).interpret()”
Archive for the ‘Design Patterns’ Category
In web programming, we often use regular expression for validating the e-mail addres... | <urn:uuid:060149e6-c418-471a-a3b9-75faf375ec14> | 2.859375 | 767 | Personal Blog | Software Dev. | 63.526894 |
Just to add a bit more to Stuarts answer, Mercury has an axial tilt of only 2 degrees, and no atmosphere to speak of. It is the only planet that has such. What do those 2 things lead to?
- If an area at one of the poles has an incline of more than 2 degrees in all directions, it will remain in permanent shadow. If it i... | <urn:uuid:902e02c0-2624-44e0-a76a-132f9c0f71e9> | 3.375 | 371 | Q&A Forum | Science & Tech. | 62.030522 |
Nanotubes wreak havoc with heat
Mar 2, 2009
Physicists in the US have discovered that electrons flowing in carbon nanotube-based circuits dissipate energy in very different ways from electrons flowing through devices made from conventional semiconductors such as silicon. The findings reveal processes of heat conduction... | <urn:uuid:baf2b1fe-2fc6-4cba-8527-1be8da967d20> | 3.609375 | 860 | Truncated | Science & Tech. | 21.485845 |
This graceful arc traces a Delta rocket climbing through
Thursday's early morning skies over
Canaveral Air Force Station in Florida, USA.
Snug inside the rocket's Centaur upper stage were
Radiation Belt Storm Probes (RBSP),
now in separate orbits within planet Earth's Van Allen
Reflected in the Turn Basin
from a vantag... | <urn:uuid:6cb27d1c-22f5-47e6-8293-6b54ddbbca4a> | 2.84375 | 165 | Truncated | Science & Tech. | 44.7464 |
Simply begin typing or use the editing tools above to add to this article.
Once you are finished and click submit, your modifications will be sent to our editors for review.
...Humphry Davy experimented on combustion, including measurements of flame temperatures, investigations of the effect on flames of rarefied gases... | <urn:uuid:b85485fe-0d83-4b6f-83a5-44c570a3efb4> | 3.21875 | 119 | Truncated | Science & Tech. | 30.13613 |
Other mussels have inspired synthetic polymers that have been made into versatile adhesives and coatings, explained J. Herbert Waite, senior author and a professor in UC Santa Barbara's Marine Science Institute. They all rely on proteins that contain an amino acid called "Dopa," (identical to the Dopa used to treat Par... | <urn:uuid:05d11987-5775-46a7-a1e5-83b9ca5e3589> | 3.515625 | 561 | Academic Writing | Science & Tech. | 42.730012 |
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The Moon Is Thought To Have Formed Closer To The Earth Than It Is Now
Mon Nov 14 03:29:45 GMT 2011 by Gary Thomas
IMHO, they were referring to radial velocity, not orbital speed as the two vary inversely. The faster an orbiting object moves, the farther from the gravitational center and ... | <urn:uuid:c8287b98-f784-49ac-b2d4-325cd61cbf49> | 3.28125 | 80 | Comment Section | Science & Tech. | 43.876364 |
Ever since physicists invented particle accelerators, nearly 80 years ago, they have used them for such exotic tasks as splitting atoms, transmuting elements, producing antimatter and creating particles not previously observed in nature. With luck, though, they could soon undertake a challenge that will make those achi... | <urn:uuid:9bcbbbd4-1316-4258-96ee-3fa5132fe11a> | 3.71875 | 242 | Knowledge Article | Science & Tech. | 29.960256 |
|Image Credit: Swinburne Astronomy Productions, Swinburne University of Technology|
First, let's go over what the astronomers observed. The team, headed by Professor Matthew Bailes of Swinburne University of Technology in Australia, was looking at a millisecond pulsar. Pulsar are the remains of very massive stars that ... | <urn:uuid:54497e57-53b4-47b0-bc3d-8f74b58fb614> | 3.984375 | 2,136 | Personal Blog | Science & Tech. | 66.074416 |
The sun is the nearest star to us, it is a [Yellow Dwarf star], the Sun is a medium star.
[why we see it the biggest?].
Due to its size and light, some people thought that it is a god, they offers gifts to it.
There was and old Chinese legend which say that a huge dragon eats the sun from time to time.(the eclipse proc... | <urn:uuid:c83dad9d-c070-4f46-a0ed-2ba746dfceeb> | 3.5625 | 729 | Q&A Forum | Science & Tech. | 65.395213 |
This article is a discussion of Atomic physics including a video.
Atomic physics is the study atoms as a system of electrons and an atomic nucleus. The main study in atomic physics is the manner in which electrons are arranged around the atoms nucleus and ways that those electron arrangements change. This includes the ... | <urn:uuid:4a41053c-1760-49c9-9a2d-9658eee8768f> | 3.171875 | 180 | Knowledge Article | Science & Tech. | 27.795735 |
♦ Keywords supported by the enumeration statement
♦ Defines an enumeration data type which contains one or more discrete values. The list of allowable values is entered within the braces, and each must conform to standard Aztec identifier naming rules. There must be at least one value entered in the list.
♦ An individu... | <urn:uuid:085ff328-6f05-45bf-9ccd-eaad09ffaeff> | 3.328125 | 356 | Documentation | Software Dev. | 32.526645 |
Scientists using a Mars-orbiting camera designed and operated at Arizona State University's Space Flight Facility have discovered the first evidence for deposits of chloride minerals, salts, in numerous places on Mars. These deposits, say the scientists, show where water was once abundant and may also provide evidence ... | <urn:uuid:68568751-d8e6-4bc9-a14f-65e70b788d32> | 3.8125 | 582 | Personal Blog | Science & Tech. | 36.521394 |
The file shell is a very distinctive bivalve. The two halves of its shell do not close completely, and a thick fringe of bright orange or red tentacles extends between them.
File shells are usually found on sand or gravel seabeds. They often use their sticky byssus thread ‘beards’ to form nests of debris, mud and seawe... | <urn:uuid:c881cb13-162f-493e-ae40-dbe6b1d8f3c1> | 3.734375 | 479 | Knowledge Article | Science & Tech. | 50.313706 |
“Today’s debate about global warming is essentially a debate about freedom. The environmentalists would like to mastermind each and every possible (and impossible) aspect of our lives.”
Blue Planet in Green Shackles
May 24, 2012
To demonise CO2 yet again, a false claim is that human production of CO2 will cause the oce... | <urn:uuid:802bfcf8-14f0-4258-81c5-17419df07e40> | 2.796875 | 1,332 | Nonfiction Writing | Science & Tech. | 52.320287 |
This section illustrates you the concept of structure in C.
Structures in C defines the group of contiguous (adjacent) fields, such as records or control blocks. A structure is a collection of variables grouped together under a single name. It provides an elegant and powerful way for keeping related data together.
Once... | <urn:uuid:50abaa09-ce74-4429-a536-a77e23373f7e> | 3.578125 | 212 | Tutorial | Software Dev. | 49.363217 |
Dr Carl Edward Sagan (November 9, 1934 - December 20, 1996) was an American astronomer, astrobiologist and highly successful science popularizer.
He pioneered exobiology and promoted the Search for ExtraTerrestrial Intelligence (SETI).
He is world-famous for his popular science books and the award-winning television se... | <urn:uuid:545362b2-3504-4fa0-966d-909d33960a1f> | 2.765625 | 183 | Knowledge Article | Science & Tech. | 26.200455 |
Oct. 4, 2012 A trade-off between photon source settings and detector specific requirements allows the generation of high-fidelity single photons.
Many quantum technologies-such as cryptography, quantum computing and quantum networks-hinge on the use of single photons. While she was at the Kastler Brossel Laboratory (af... | <urn:uuid:93e26d09-ec71-4855-ac50-2f76b86a31f1> | 3.546875 | 450 | Truncated | Science & Tech. | 37.175634 |
This page summarizes the relationships among specifications, whether they are finished standards or drafts. Below, each title links to the most recent version of a document. For related introductory information, see: Data, Linked Data.
W3C Recommendations have been reviewed by W3C Members, by software developers, and b... | <urn:uuid:13f7e0b3-3904-478b-9274-dd56eab108da> | 2.734375 | 510 | Documentation | Software Dev. | 25.798081 |
This program plots time series of monthly total
precipitation, or monthly average temperature, based on divisional
climate data for the U.S.
The user selects the quantity (precipitation or temperature) and the beginning and ending year (begins with January of the beginning year and ends with December of the ending year... | <urn:uuid:b5693538-dff6-42bb-813a-00a3418e93b7> | 3.328125 | 332 | Tutorial | Science & Tech. | 65.141186 |
Restoring California's Wild Watersheds
Emboldened by that success, the small coalition of county officials and businessmen expanded to include ranchers, environmentalists, and state and federal officials. Although many of them had been at odds over land management issues, they realized they could only heal the watershe... | <urn:uuid:6211180f-b121-483f-aaa8-34cf431f41cb> | 3.171875 | 1,500 | Nonfiction Writing | Science & Tech. | 39.530652 |
ACS supports various types of data that you can use. Of these, most are handled as hacks. In reality ACS only supports one data type and that is the integer type.
The integer data type is your basic data type. An integer is any whole number and can be negative, positive or zero. The range for an integer is from -2,147,... | <urn:uuid:ff6ebd23-7a92-4a4d-b678-d7e6d4c50759> | 3.3125 | 662 | Knowledge Article | Software Dev. | 73.052735 |
Distributed Bragg reflectors (DBRs) are mirrors made of semiconductor materials like GaAs and AlAs. They consist of alternating thin layers of materials with different refractive indexes; the reflections from successive interfaces sum together for very high total reflectivities. For example, a stack of 30 pairs of alte... | <urn:uuid:486f1922-aeb1-4d05-94d3-49c81d77a007> | 3.71875 | 434 | Academic Writing | Science & Tech. | 30.591702 |
Alu elements are transposable DNA sequences—jumping genes—that "reproduce" by making a copy of themselves and then inserting that copy into a new spot on the chromosome. Alu elements did this so effectively in the past that they now comprise 10 percent of the human genome, and as such are the most abundant mobile eleme... | <urn:uuid:4c76c1de-5741-402a-91c6-929d3f9c550a> | 3.8125 | 693 | Knowledge Article | Science & Tech. | 31.365786 |
- "why is the limit imposed by pion pair production as opposed to electron pair production? the energies required for electron pair production is /significantly/ less than pion pair production."
I recently came across the figure below, which depicts the energy loss of a proton times 1/E (the relative energy loss per ye... | <urn:uuid:3782b1a7-e030-4a65-9908-8e80e9a3e47b> | 2.890625 | 383 | Comment Section | Science & Tech. | 49.646039 |
One thing I like to see is kids getting their hands on doing science. There’s something about being involved with something, actually doing it for yourself, that gives you a sense of ownership over the knowledge, makes you part of something bigger.
Here’s another chance to do that for students across the world: the ERG... | <urn:uuid:fd93f147-e01a-4208-81e2-1692fd8fd0ff> | 3.625 | 803 | Personal Blog | Science & Tech. | 53.158421 |
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For those of you who believe recent molecular evidence suggesting early
mammalian ordinal divergence is not a challenge to the claimed competence
of our current fossil record, i.e., that genetic changes may lead to f... | <urn:uuid:3f111d35-925e-4fa6-8d31-a02ba88fa9a3> | 2.796875 | 337 | Comment Section | Science & Tech. | 32.998446 |
) 6-by-0.2-inch (150 mm × 5.1 mm) tritium vials are simply tritium gas-filled, thin glass vials whose inner surfaces are coated with a phosphor
. The "gaseous tritium light source" vial shown here is brand new.
Radioluminescence is the phenomenon by which light is produced in a material by bombardment with ionizing rad... | <urn:uuid:bbcf1b8c-64a8-4ed0-8fa6-3817cc30f1a1> | 3.234375 | 444 | Knowledge Article | Science & Tech. | 36.631765 |
<p>Generally, <span class="taxon"><em>Apis mellifera</em></span> are red/brown with black bands and orange yellow rings on abdomen. They have hair on thorax and less hair on abdomen. They also have a pollen basket on their hind legs. Honeybee legs are mostly dark brown/black.</p> <p>There are two castes of females, ste... | <urn:uuid:d90769ce-6ace-48d9-9af6-4a9587c7c830> | 3.3125 | 607 | Knowledge Article | Science & Tech. | 54.093606 |
The laser turns 50 this year with the construction of the first ruby laser.
The first CO2 laser followed only 2 years later in 1963.
How Stuff Works and this video gives an overview of how lasers work, the video concentrates on the Ruby laser. The How Stuff Works gives a more general overview but talks about the transi... | <urn:uuid:64c35945-581d-459b-a44d-b32c9ea2db07> | 3.125 | 1,144 | Personal Blog | Science & Tech. | 57.707439 |
WFIU Public Radio
WTIU Public Television
To create a bomb based on nuclear fission, the scientists working on the top secret Manhattan Project had to find fissionable fuel. They settled on enriched uranium.
What is RSS? RSS makes it possible to subscribe to a website's updates instead of visiting it by delivering new p... | <urn:uuid:1fae6114-6650-4295-bab6-025d95b1a6fb> | 2.890625 | 152 | Truncated | Science & Tech. | 37.649429 |
You can represent a list of distinct integers no larger than N using exactly N bits: if the integer i appears in your list, you set the i th bit to true. Bits for which there is no corresponding integers are set to false. For example, the integers 3, 4, 7 can be represented as 00011001. As another example, the integers... | <urn:uuid:67ddd1fc-5a0a-406d-b004-0f6fc6b3f02c> | 2.890625 | 631 | Personal Blog | Software Dev. | 56.183426 |
5.4. Cosmological scales
5.4.1. Foreground Cosmological Screen (~ 20 Gigaparsecs)
The physical conditions of the gas outside of clusters of galaxies are not well known. Forman et al. (1984) found values near n ~ 2 × 10-8 cm-3 and T ~ 3 × 108 K, from X-ray data and analysis. Somewhat higher n values have been used elsew... | <urn:uuid:1b3f2b0c-f602-4f17-8df2-187bce4a697d> | 2.765625 | 381 | Academic Writing | Science & Tech. | 83.347978 |
Individual differences |
Methods | Statistics | Clinical | Educational | Industrial | Professional items | World psychology |
A peptide bond is a chemical bond formed between two molecules when the carboxyl group of one molecule reacts with the amino group of the other molecule, releasing a molecule of water (H2O). Thi... | <urn:uuid:12c5210c-6a6b-460b-a948-023e02566e78> | 3.84375 | 1,567 | Knowledge Article | Science & Tech. | 37.278924 |
Why Use PHP?
There are thousands of programming languages available and every year, new programs are being made. But only few of these have become sufficiently popular and are used by many people. One of which is PHP or hypertext preprocessor. It is a general-purpose server-side scripting language designed for web deve... | <urn:uuid:f419486e-9b54-494f-8872-4562540697ec> | 2.9375 | 404 | Personal Blog | Software Dev. | 50.792419 |
1 Introduction to MATLAB Classes
In MATLAB, like most programming languages, every value is a class. Typically the classes are double, char, float, single, cell, etc. (The class of a given value or object can be determined using the built-in MATLAB command class.)
For many repetitive tasks building your own classes mak... | <urn:uuid:671972b5-6581-4574-93e1-f217c4044b51> | 3.015625 | 529 | Documentation | Software Dev. | 41.23069 |
Created on Day 5
May 24, 2012
Scientists have discovered that coral has layers, and some scientists have measured these layers claiming that they show slow growth over long periods of time. However, it has been shown that coral can grow quickly. With this knowledge, even the “oldest” reefs would only be a few thousand ... | <urn:uuid:0b5e72a6-15eb-4f36-884a-574fa2ffa43c> | 4.25 | 427 | Knowledge Article | Science & Tech. | 42.527394 |
beryllium (Be)Article Free Pass
beryllium (Be), formerly (until 1957) glucinium, chemical element, the lightest member of the alkaline-earth metals of Group 2 (IIa) of the periodic table, used in metallurgy as a hardening agent and in many outer space and nuclear applications.
Occurrence, properties, and uses
Beryllium... | <urn:uuid:e7bfcb54-e796-4bd6-9d98-21c429c18ace> | 3.671875 | 1,439 | Knowledge Article | Science & Tech. | 31.398436 |
An abnormally cool Arctic is seeing dramatic changes to ice levels. In sharp contrast to the rapid melting seen last year, the amount of global sea ice has rebounded sharply and is now growing rapidly. The total amount of ice, which set a record low value last year, grew in October at the fastest pace since record-keep... | <urn:uuid:09e4272c-d3ea-4587-9827-7bd99ff6d184> | 3.515625 | 1,030 | Comment Section | Science & Tech. | 35.713183 |
Chemical bonding > Bicyclic
Organic chemistry > Bicyclic
Naming Bicyclic Alkanes according to IUPAC Rules
This is a video lesson about how to name bicyclic alkanes according to IUPAC rules. It is meant to accompany a worksheet that should be solved alongside the ...
Naming Cycloalkanes and Bicyclo Alkanes
Download My e... | <urn:uuid:b36d2894-1111-4b35-9bb3-68e9dfa06ecc> | 2.90625 | 446 | Content Listing | Science & Tech. | 44.292154 |
Endangered Mammals of Antarctica
Corals, Jellyfish, and Sea Anemones
Click on the species name to view its profile.
***What mammals are listed here?:The Antarctica section of this site lists the folllowing mammals appearing on select endangered species lists:
- Mammals that dwell in or migrate to Antarctica.
- Mammals ... | <urn:uuid:993f0ddf-61c7-4b90-9d67-1320fa3a1683> | 2.734375 | 180 | Content Listing | Science & Tech. | 40.000657 |
C# LINQ Query Keywords
The LINQ queries are server side contextually language integrated queries that enable you to work with data items retrieved from any kind of data source. Likewise other database query language LINQ also contains few contextual keywords that instruct the compiler which action to perform. LINQ uses... | <urn:uuid:bff541f4-24f1-4013-b2db-4ad1246a0a18> | 2.71875 | 484 | Tutorial | Software Dev. | 56.008132 |
Click here to pick up where
the print issue left off.
The past year provided a wealth of exciting data returned by several spacecraft exploring the solar system.
In October of 2001, the Mars Odyssey spacecraft joined the successful Mars Global Surveyor in orbit around Mars. Odyssey carries the first gamma-ray spectrome... | <urn:uuid:251c7c2b-ee88-411f-b97f-47347626dfa5> | 3.34375 | 1,449 | Content Listing | Science & Tech. | 47.554578 |
These tracks contain cDNA and gene alignments produced by the TransMap cross-species alignment algorithm from other vertebrate species in the UCSC Genome Browser. For closer evolutionary distances, the alignments are created using syntenically filtered BLASTZ alignment chains, resulting in a prediction of the orthologo... | <urn:uuid:aa0d7cf6-f9e5-41c4-8562-5d37572dc500> | 2.734375 | 754 | Knowledge Article | Science & Tech. | 52.420356 |
Steatoda nobilis, a species of comb-footed spider, characteristically hang upside down in webs known as tangle webs. Typically, their webs are built high off the ground in a darker corner.
This group of spiders does not specialise on particular prey but are opportunistic and feed on almost any invertebrate that becomes... | <urn:uuid:4b3195bb-a798-4dba-a42f-5769c25d71f7> | 3.578125 | 254 | Knowledge Article | Science & Tech. | 42.654637 |
gluLookAt — define a viewing transformation
Specifies the position of the eye point.
Specifies the position of the reference point.
Specifies the direction of the up vector.
gluLookAt creates a viewing matrix derived from an eye point, a reference
point indicating the center of the scene, and an UP vector.
The matrix m... | <urn:uuid:1c89758b-6ebd-43cb-89aa-4e76cb6e38a8> | 2.828125 | 267 | Documentation | Software Dev. | 56.626952 |
Coupled Ocean-Atmosphere Models
Scientists use computer models to help them understand the Earth. Scientists who study the atmosphere use computer models of the atmosphere. Some scientists who study the oceans use computer models of the seas. Some scientists study both the atmosphere and the oceans. Those scientists us... | <urn:uuid:a5ff6255-41e4-4995-80da-0f1c1ce106e0> | 3.265625 | 415 | Knowledge Article | Science & Tech. | 62.358267 |
EXAMPLES OF FUNCTIONS
The examples given here:
¨ are basic types of functions that are used everywhere in abstract math
¨ are functions you need to be familiar with
¨ are (sigh) boring.
For any set A, the identity function is the function that takes an element to itself; in other words, for every element , . Its graph ... | <urn:uuid:590c70a7-2acd-4770-a87f-c8d8ca383a87> | 3.90625 | 2,468 | Documentation | Science & Tech. | 63.4672 |
Global Climate Change and Implications for Future Plant Disease Epidemics
Department of Crop Sciences
Human activities have altered the earth’s atmospheric composition, increasing levels of both carbon dioxide and ozone. Levels of these two gasses are predicted to continue to climb well into the 21st century. By the ye... | <urn:uuid:36927be9-dd21-4b88-a5ed-5da96d678ea2> | 3.296875 | 722 | Academic Writing | Science & Tech. | 23.759482 |
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.
2012 October 7
Explanation: Are square A and B the same color? They are! To verify this, either run your cursor over the image or click here to see ... | <urn:uuid:9ca33015-c880-49ef-bc73-70a2cbd7b04b> | 3.4375 | 208 | Knowledge Article | Science & Tech. | 34.676667 |
Once we've created an Elm, we can start manipulating them. Recall from earlier that we stated that an Elm was simply an HTMLElement that DomAPI adds some customs properties and methods to. Let's start looking now at what some of those methods are.
This is not meant to be an exhaustive list of methods available to Elms,... | <urn:uuid:07425928-61cb-4f3e-a494-dd4baea3816f> | 2.921875 | 250 | Tutorial | Software Dev. | 52.524886 |
Biology & Chemistry
Stan Botchway explains how lasers have a dual purpose when studying DNA – doing the damage and then monitoring the repair process.
Evolutionary biology professor Daniel Lieberman, whose studies are the scientific backbone for Chris McDougall’s BORN TO RUN, gives five pointers on how he thinks you ca... | <urn:uuid:4b0808b4-8160-4154-92a5-7f4cb6496aae> | 2.921875 | 699 | Content Listing | Science & Tech. | 45.168298 |
Jupiter's Great Red Spot
Photograph courtesy NASA
In 1979 Voyager 1 captured this photo of an immense high-pressure storm, called the Great Red Spot, swirling on Jupiter. Winds blow counterclockwise around the Great Red Spot at about 250 miles (400 kilometers) an hour. The storm is larger than one Earth diameter from n... | <urn:uuid:ead7da87-6d55-4d0c-bc70-c4fa3c97a025> | 3.046875 | 83 | Knowledge Article | Science & Tech. | 60.423383 |
Science News has an exploration of the deeper implications of neutrino oscillation, one experimental confirmation of which we discussed last month. "The new findings could even signal a tiny breakdown of Einstein's theory of special relativity. ... MINOS [for Main Injector Neutrino Oscillation Search] found that during... | <urn:uuid:b3a75e8f-7fc1-4a1c-99a2-c842b869dcb8> | 2.75 | 174 | Comment Section | Science & Tech. | 37.252583 |
Pollution from Fires across Northwest Africa
Fires in the savanna south of the Sahara Desert, and in the tropical rainforests at latitudes just north of the equator, form an intense swath of biomass burning across the African continent from December through April each year. This is a region of high grass production and... | <urn:uuid:78e62211-434c-4d0e-b35d-88333a8becf8> | 3.59375 | 294 | Knowledge Article | Science & Tech. | 30.999545 |
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Antarctica and the surrounding area are natural laboratories for scientific research that can not be done anywhere else on Earth. Among the unusual aspects of the continent are its harsh climate and extreme cold, frigid ice-filled oceans, vast polar ice cap and large glaciers, geologic formations an... | <urn:uuid:d24534b9-76ab-4e01-bd46-048811e0b5fd> | 3.859375 | 653 | Content Listing | Science & Tech. | 27.285385 |
The Lorentz Transformation as a Wave Function
We will demonstrate that translation-dependent transformations, of which the Lorentz Transformation is a special case, arise naturally out of wave systems. As a result, the Lorentz Transformation might be considered a natural consequence of the wave characteristics of matte... | <urn:uuid:a71aba79-d5d8-46a3-87c5-6dcfc303393a> | 2.890625 | 650 | Knowledge Article | Science & Tech. | 35.312427 |
Increasing the amount of electricity a solar panel produces is one of the most effective ways to reduce the cost of solar power.
MIT’s Technology Review reports on a new $2.4 million project funded by the U.S. Advanced Research Projects Agency for Energy aims to greatly increase the amount of sunlight that becomes elec... | <urn:uuid:e978f1cc-7b97-4e30-a90c-9934f391aee4> | 3.4375 | 138 | Truncated | Science & Tech. | 49.621038 |
Tyrannosaurs are superb nightmare fuel. Exquisitely adapted for catching, killing and crunching other dinosaurs, they were among the most formidable predators ever, and now University of Alberta palaeontologist Philip Currie has proposed an even more frightening twist to tyrannosaur behaviour. The tyrants were not lone... | <urn:uuid:b1d5769c-5ec2-4616-ba43-df03f4682d3a> | 2.765625 | 1,908 | Nonfiction Writing | Science & Tech. | 24.237029 |
The cloud is an abstract notion of a loosely connected group of computers working together to perform some task or service that appears as if it is being fulfilled by a single entity. The architecture behind the scenes is also abstract: each cloud provider is free to design its offering as it sees fit. Software as a Se... | <urn:uuid:08da3a69-a954-49f2-82f6-fa67a4700559> | 3.109375 | 3,568 | Documentation | Software Dev. | 56.195873 |
A cycle that contains finitely many elements is a finite cycle and the cycle length is the number of elements it contains.
Let be a permutation written as a finite product of disjoint cycles of finite length. The order of is the least common multiple of the lengths of the cycles.
A transposition is a cycle of length tw... | <urn:uuid:2e557175-df06-4743-8f2d-5e030a2827d9> | 3.890625 | 234 | Q&A Forum | Science & Tech. | 37.475909 |
|flux, light||medical dictionary|
<microscopy> Sometimes called luminous flux, the visible portion of the radiant energy emitted by a light source. It is measured in lumens per solid angle. In electrical engineering, it is analogous to the lines of force in a magnetic field, spoken of as magnetic flux.
(05 Aug 1998)
|B... | <urn:uuid:85a03aa7-2e60-48b0-815c-e88aa5aad402> | 2.953125 | 90 | Structured Data | Science & Tech. | 35.026175 |
- This article is about the electromagnetic phenomenon.
In physics, there are two kinds of dipoles (from the Greek terms di(s)-, meaning "two," and polos, meaning "pivot" or "hinge"): An electric dipole and a magnetic dipole. An electric dipole refers to an object or system in which positive and negative electric charg... | <urn:uuid:d6dbefa8-7d45-42ed-936e-e7ae70006b47> | 4.375 | 3,467 | Knowledge Article | Science & Tech. | 37.872208 |
Visual Basic 6's Variant data type is able to hold any other data type, including numbers, strings, dates, and object references. This data type can be very useful in a wide variety of situations. I'll show you a couple of useful tricks with Variants.
When a Variant has been declared but not assigned a value, it contai... | <urn:uuid:20a6668d-f22f-425a-8928-c39273d24f13> | 3.203125 | 314 | Tutorial | Software Dev. | 54.776338 |
The copperhead is also called the death adder, chunk head and dry-land moccasin. Its scientific name is Agkistrodon contortrix. It is a pit viper and like all pit vipers, it is an ambush predator. The copperhead will sit and wait in the dry leaf matter waiting for an animal to come into its path.
Unlike many of hte vip... | <urn:uuid:c72724a9-f3c2-4447-bb26-044e23e4b40d> | 2.78125 | 185 | Knowledge Article | Science & Tech. | 63.758879 |
31st August 2011
The research, published with little fanfare this week in the prestigious journal Nature, comes from über-prestigious CERN, the European Organization for Nuclear Research, one of the world’s largest centres for scientific research involving 60 countries and 8,000 scientists at more than 600 universities... | <urn:uuid:2855d19e-9dce-486e-8fc3-c16f7d68ea21> | 2.78125 | 151 | Personal Blog | Science & Tech. | 37.144185 |
He-3 The Thermobile
Published: Monday 13 March 2006 - Updated: Monday 28 March 2011
To demonstrate the conversion of thermal energy into mechanical energy using a shape memory alloy (Nitinol).
- Beaker of hot water
Click on pictures to enlarge.
The thermobile consists of a shape memory alloy Nitinol (Nickel-Titanium). ... | <urn:uuid:3ebe8125-1395-495a-8209-48d646de5597> | 3.015625 | 144 | Tutorial | Science & Tech. | 34.408485 |
By Kato Mivule
During a database development process, often database developers will engage with their clients and users to solicit the requirements that the new database is supposed to accomplish. One of the best ways to communicate with clients and users is with the use of ER diagrams to check if the developers have ... | <urn:uuid:fed409a0-099c-4666-b991-645fdf9c2b89> | 3.015625 | 938 | Personal Blog | Software Dev. | 38.002318 |
Date: April 2003
Why does DNA decompose when heated to too high a temperature?
The most of the hydrogen bonds that join the two DNE stands break from the
heat. With more heat the actual bonds between the nucleotides can break
-fragmenting a strand.
Very few organic molecules can with stand high temperatures for very
lo... | <urn:uuid:5987cb50-6a4d-4616-95e0-78f67f20e21d> | 3.203125 | 746 | Knowledge Article | Science & Tech. | 50.517779 |
Not All Australian Marine Fauna Obeying Climate-Alarmist Dogma
Poloczanska, E.S., Smith, S., Fauconnet, L., Healy, J., Tibbetts, I.R., Burrows, M.T. and Richardson, A.J. 2011. Little change in the distribution of rocky shore faunal communities on the Australian east coast after 50 years of rapid warming. Journal of Exp... | <urn:uuid:8f854e9e-a464-4397-a023-3a1151ae54ae> | 2.828125 | 476 | Academic Writing | Science & Tech. | 44.34032 |
The Complexity of Life
Cindy Lee Van Dover
College of William & Mary
The sea bed might seem simple enough. Dead plants, animals and microorganisms combine with wind- and rain-eroded soil dust, and rain down from sunlit surface waters to accumulate on the sea floor. The descent of dead material is itself a complex proce... | <urn:uuid:776d772b-8ce0-4fe9-b030-29f51121dec3> | 3.890625 | 1,084 | Knowledge Article | Science & Tech. | 34.30118 |
J. Prat-Camps et al./Autonomous Univ. of Barcelona
Field trip. Cylindrical shells with the right properties would expel magnetic field energy. Here, the field from a bar magnet within the shell on the left is pushed outward, increasing its strength in the exterior region. A second shell, on the right, captures the fiel... | <urn:uuid:b8902f65-4034-4dff-898b-65067363ee41> | 2.859375 | 105 | Academic Writing | Science & Tech. | 64.4975 |
The pictures from Mars take my breath away. I am lost for words to describe the bravado and brilliance of the engineers and scientists who placed this robotic laboratory so gently onto the surface of Mars.
NASA should be very proud. Americans should be proud too: they paid for it -around $10 per head. And we should all... | <urn:uuid:95ea8efc-359a-4fe9-8f54-6086c0fad56b> | 3.34375 | 741 | Personal Blog | Science & Tech. | 52.296807 |
Astronauts Collect Cave Life
CAVES training sends astronauts from all the International Space Station partner nations underground for a week to learn about working in multi-cultural teams under extreme conditions.
During their six-night stay in caves in Sardinia, Italy, their scientific research included meteorology, s... | <urn:uuid:ce1caf99-af92-4d23-8163-c6e0aabae48f> | 3.703125 | 604 | Knowledge Article | Science & Tech. | 33.880716 |
NASA's Voyager 1 spacecraft has entered a new region between our solar system and interstellar space, which scientists are calling the stagnation region. In the stagnation region, the wind of charged particles streaming out from our Sun has slowed and turned inward for the first time, our solar system's magnetic field ... | <urn:uuid:9ef6532f-d622-4ac3-b525-f7aaa0e8abaa> | 3.875 | 146 | Truncated | Science & Tech. | 53.403009 |