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Eta Carinae, one of the most massive stars in the Milky Way Galaxy, has been called a 'supernova in the making'. An outburst seen from the southern hemisphere in 1843 made it briefly the second brightest star in the night sky, although it is an estimated 9,000 light years from Earth. The star itself is not seen in this... | <urn:uuid:41367b6d-fc6d-4e42-b37c-8ba8070b4e42> | 3.71875 | 295 | Knowledge Article | Science & Tech. | 45.63435 |
Search Loci: Convergence:
Just as the introduction of the irrational numbers ... is a convenient myth [which] simplifies the laws of arithmetic ... so physical objects are postulated entities which round out and simplify our account of the flux of existence .... The conceptional scheme of physical objects is [likewise]... | <urn:uuid:8e8458c1-56b1-46de-8399-c621e0c5f3f4> | 3.46875 | 567 | Knowledge Article | Science & Tech. | 50.018916 |
Mathematician Who build Mathematics
This article is about the short biographies of great Mathematicians with whom mathematic's did start.Article include the short description of the life and work of Thales,Pythagoras and Euclid.
- Thales(ca.625-547 B.C.)
- Thales Work
- Pythagoras(ca. 580-500 B.C.)
- Pythagoras Work
- ... | <urn:uuid:ef7ddc68-3fc9-4123-bec7-3b47ed57c58f> | 3.765625 | 1,255 | Knowledge Article | Science & Tech. | 53.542969 |
Spikes on Saturn
The beautiful, swirling band stretching around Saturn's northern hemisphere in this false-color image is a storm that raged from 2010 to 2011. NASA's Cassini spacecraft monitored the action in the jovian planet's atmosphere, sending back interesting and sometimes bizarre data back to scientists on Eart... | <urn:uuid:3bfeab0b-f63a-4f57-a487-bd5f9525bc0e> | 3.34375 | 170 | Knowledge Article | Science & Tech. | 26.336943 |
According to one report, 49 of the 50 U.S. states reported snow on the ground today.
Only Hawaii had no snow. Here in the Atlanta area, the massive storm that left Dallas under nearly a foot of snow (a record), the snow started falling around 1 P.M., and had been reduced to flurries by 8:00 P.M. But with temperatures d... | <urn:uuid:6d33e6ff-e39d-484b-a814-8cce872f7ce5> | 3.046875 | 350 | Personal Blog | Science & Tech. | 59.194736 |
The projected disappearance of small glaciers* worldwide threatens to eliminate the water supply for numerous towns in valleys, such as the Ecuadorian capital Quito, fed by the rivers that flow down from the surrounding mountains. But retreating ice is also a threat to freshwater fauna. According to a study published i... | <urn:uuid:56507017-bf6e-4542-b039-644426acacaa> | 3.65625 | 348 | Content Listing | Science & Tech. | 25.972061 |
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.
study of upper-level wind systems
The characteristics of upper-level wind systems are known mainly from an operational worldwide network of rawins... | <urn:uuid:b9370a5c-1ece-4206-b3a1-ef64bfa74d41> | 3.109375 | 144 | Knowledge Article | Science & Tech. | 38.252273 |
A warmer atmosphere results in an amplification of the water cycle. Some areas of the world are net importers of rainfall (such as tropical rainforests), while some are net exporters (such as oceans around the tropics). The “amplification” of the cycle means that dry regions become drier, and wet regions become wetter.... | <urn:uuid:5062eb97-f95e-406b-89d1-50296d1ed9a5> | 3.78125 | 331 | Knowledge Article | Science & Tech. | 48.458457 |
Soils Plants and Invasion
Plants live in tight association with microbes, especially belowground where fungi and bacteria live on and inside the roots of plants. The relationship can be beneficial or harmful to the plant. Some microbes cause plant diseases by decomposing roots. Others trade nutrients with the roots in ... | <urn:uuid:ca862d68-2458-4020-914f-1fba167a4e4d> | 3.734375 | 321 | Content Listing | Science & Tech. | 30.153675 |
The Darwin’s Frog (Rhinoderma darwinii), is a frog native to the forest streams of Chile and Argentina. It is named after Charles Darwin who discovered it on his world voyage, “Voyage of the Beagle”, on the HMS Beagle.
The frog is brown or green with a size of about 1.25 inches. Its front feet are not webbed, but some ... | <urn:uuid:3926994e-1b0e-4b0a-9d3a-a12944202b51> | 3.390625 | 259 | Knowledge Article | Science & Tech. | 69.896931 |
Our Milky Way galaxy is teeming with a wild variety of planets. In addition to our solar system's eight near-and-dear planets, there are more than 800 so-called exoplanets known to circle stars beyond our sun.
A typical robot may struggle to discover objects in its surroundings when it relies on computer vision alone. ... | <urn:uuid:0af44ba2-42d9-4be3-b91e-2cc3f9a4f6e3> | 3.21875 | 903 | Content Listing | Science & Tech. | 46.061924 |
Tongueless Frogs, AglossaDavid Cannatella
This tree diagram shows the relationships between several groups of organisms.
The root of the current tree connects the organisms featured in this tree to their containing group and the rest of the Tree of Life. The basal branching point in the tree represents the ancestor of ... | <urn:uuid:8298c6cc-6302-489e-93fa-9db8a36b1240> | 3.640625 | 1,745 | Knowledge Article | Science & Tech. | 45.714468 |
Cesty do hlubin zamrzlého času
Journeys into the depth of frozen time by Petr Pokorný.
Cores through the polar ice sheets provide a remarkable record of past environmental conditions. Ice coring evolved as a specific science since 1960s through pioneering effort of scientists from USA and other nations. Snow accumulati... | <urn:uuid:28e979d7-2b83-49c9-9bf6-5e18a6435e40> | 3.5625 | 187 | Knowledge Article | Science & Tech. | 28.765 |
Small (µm –mm scale) aquatic organisms rarely have strong enough morphological features to actively migrate over long distances. Despite this many taxa occur almost everywhere on Earth and the expression “everything is everywhere” has been used regarding these small creatures. During an expedition to one of the most ho... | <urn:uuid:4cc31c50-fb79-485f-9cdf-0db2c2ce89bb> | 3.671875 | 429 | Personal Blog | Science & Tech. | 20.992747 |
In the Eiffel user discussion group , Ian Joyner recently asked:
A lot of people are now using Result as a variable name for the return value in many languages. I believe this first came from Eiffel, but can’t find proof. Or was it adopted from an earlier language?
Proof I cannot offer, but certainly my recollection is... | <urn:uuid:c3c69279-448f-4db4-8972-f1218195d726> | 3.265625 | 1,104 | Personal Blog | Software Dev. | 35.035668 |
A language element that took a third if not a second look before I understood it is declaring an Objective-C method. Since I am a newbie as far as coding in Objective-C is concerned, I just accepted things for what is, understanding a bit first, making something work, and learn more about it as I progressed. When you d... | <urn:uuid:8e632dc9-8ade-457c-baa3-158e57e272b3> | 3.125 | 953 | Personal Blog | Software Dev. | 40.481131 |
The Problem of Distribution in an Expanding Universe
Therefore, we must consider the alternative scale of distance, and formulate the law of distribution on the assumption that red-shifts are the familiar velocity-shifts, and do measure the expansion of the universe. The actual recession necessitates one correction to ... | <urn:uuid:2bbce61d-a553-421e-b17d-64098015a5d4> | 3.453125 | 831 | Academic Writing | Science & Tech. | 30.314677 |
Accidental Pinhole and Pinspeck Cameras
Accidental pinhole and antipinhole cameras
There are many ways in which pictures are formed around us. The most efficient mechanisms are to use lenses or narrow apertures to focus light into a picture of what is in front. So a set of occluders (to form a pinhole camera) or a mirr... | <urn:uuid:b2463c8a-1494-4bba-8093-501510b6e9d8> | 3.546875 | 635 | Academic Writing | Science & Tech. | 47.682787 |
The spin-torque effect in a nanomagnet. (top left) If the polarization of the spins in the current (, green arrow) is parallel to the easy axis (black arrow), the spin torque opposes the natural damping and opens up the angle of the precession cone at all points along the cone. (top right) If makes a finite angle with ... | <urn:uuid:21a98938-a863-41ea-8418-873d9a8d2ccc> | 2.953125 | 201 | Academic Writing | Science & Tech. | 46.16 |
Everybody knows that when a stone is dropped in water, a jet of water shoots up. Physicists Detlef Lohse, from the University of Twente in The Netherlands, and Heinrich Jaeger, of The University of Chicago, are combining math, theory and super high-speed videos to try to figure out the basic physics underlying the jet.... | <urn:uuid:4bec2120-57e0-457a-b28d-1d692f035942> | 2.90625 | 132 | Truncated | Science & Tech. | 32.615379 |
Sunday, 22 November 2009
British Wildlife: T
Thecodontosaurus antiquus Morris, 1843
Thecodontosauridae; Saurischia; Sauropsida; Chordata
Thecodontosaurus has often been nicknamed 'The Bristol Dinosaur'. Its remains were first found in Clifton, near the Avon Gorge, and remains one of the earliest dinosaurs yet to be fou... | <urn:uuid:64c79f19-b77c-4aae-ba47-42f6e55e8188> | 3.3125 | 846 | Personal Blog | Science & Tech. | 39.870973 |
Q&A: Galaxies, Galaxy Clusters, AGN, and Quasars
In my local newspaper an article from the Los Angeles Times has
the following quote, "...the center of the galaxy..is a violent
place where stars are forming, dying and exploding at furious
rates and being buffeted by supernova shock waves." So, how do
you define "furiou... | <urn:uuid:8ffee866-746a-42af-94f1-72419d6b7822> | 2.953125 | 226 | Q&A Forum | Science & Tech. | 63.397714 |
Return to Atomic Structure menu
The charge on electron was first measured by J.J. Thomson and two co-workers (J.S.E. Townsend and H.A. Wilson), starting in 1897. Each used a slightly different method. Townsend's work will be described as an example.
Townsend's work depended on the fact that drops of water will grow aro... | <urn:uuid:f023966f-e4fb-4a3a-af32-700c764fa467> | 3.640625 | 1,416 | Knowledge Article | Science & Tech. | 66.582732 |
Evidence for Spectral Lines
Spectral lines were first seen in the sun's spectrum by William Wollaston in 1802.
However, they were not systematically studied until 1814, when a German optician named
Joseph von Fraunhofer observed and catalogued them. Fraunhofer carefully recorded the
positions of the lines, but he didn'... | <urn:uuid:7ed2a7d3-a3ee-4934-84ae-9c50e7799b7a> | 4 | 240 | Knowledge Article | Science & Tech. | 48.040189 |
Dr Ccile Gaspar of French Polynesia asks: Q: What is the situation of green, hawksbill and leatherback sea turtles in the world? A:
Sea turtles are among the most threatened, yet poorly understood creatures of the ocean, says Roderic Mast, Vice President at Conservation International and Director of CIs Sea Turtle Flag... | <urn:uuid:45518250-5a90-4aea-8158-826035a82f80> | 3.484375 | 367 | Q&A Forum | Science & Tech. | 26.459727 |
A reader sent this abstract of a Henrik Svensmark study with a one word caption: Wow! I agree. The notion that "local" (and by local, we mean unimaginably far away) supernova affecting the Earth's climate is certainly creative. Haven't even read the thing so certainly not buying it yet, but it certainly is an amazing h... | <urn:uuid:929d5dcb-09c6-4a1f-950b-8beb75980a8f> | 2.921875 | 369 | Personal Blog | Science & Tech. | 36.41114 |
Aired Wednesday, August 20, at 8:00 p.m. on CPTV
Renowned astrophysicist Neil deGrasse Tyson investigates whether a “doomsday asteroid†the size of the Rose Bowl will hit the earth in 2036, and explores what the consequences could be — and what steps NASA could take to avoid this catastrophe. Other stories include... | <urn:uuid:bf754e31-6041-41ce-9139-28076b86c4b8> | 2.6875 | 221 | Content Listing | Science & Tech. | 37.978569 |
Look up monthly U.S., Statewide, Divisional, and Regional Temperature, Precipitation, Degree Days, and Palmer (Drought) rankings for 1-12, 18, 24, 36, 48, 60-month, and Year-to-Date time periods. Data and statistics are as of January 1895.
Please note, Degree Days are not available for Agricultural Belts
Wyoming Temper... | <urn:uuid:6fd3e763-d4b5-4d90-873c-aa50744c41ff> | 2.703125 | 140 | Structured Data | Science & Tech. | 51.857104 |
MySQL is an open source relational database management system that is a popular database option for web applications. MySQL is written using C and C++ and makes use of the SQL database language to access and manipulate data stored in the database.
Although MySQL is primarily used with Linux operating systems it also of... | <urn:uuid:8fab8ec6-0331-4e33-be96-0e84b34bb213> | 2.828125 | 125 | Knowledge Article | Software Dev. | 33.765942 |
Frogs and Toads in Alabama
Frogs and toads are tailless, aquatic, semiaquatic, or terrestrial amphibians characteristically having a smooth moist skin, webbed feet, and long hind legs adapted for leaping. Adults lack tails and most have a well-developed ear and a voice used to attract mates, drive off intruders and to ... | <urn:uuid:e98f178c-ea9f-4a5e-8bba-359451b65392> | 3.6875 | 2,244 | Structured Data | Science & Tech. | 34.176308 |
Dec. 31, 2008 Plants come in all shapes and sizes, from grand Redwood trees to the common Snowdrop. Although we cannot see them, under the ground plants rely on a complex network of roots. What determines the pattern of root growth has been a mystery, but a new paper shows that the shape of the existing root can determ... | <urn:uuid:e87899f9-8c40-4b9d-9055-0756ab8d864d> | 3.40625 | 450 | Truncated | Science & Tech. | 44.279349 |
More In This Article
About 20 years ago one of the authors of this article took his father's binoculars and tiptoed out of the house at night. The budding astronomer decided that he would look for playmates on other planets going around stars in the sky. To his chagrin, the binoculars made no difference whatsoever. The... | <urn:uuid:ecaa181c-2e45-4662-9c7a-9aef7b834733> | 3.578125 | 321 | Truncated | Science & Tech. | 36.154588 |
Comments on Vortex Engine - Tame Tornadoes May Generate Power
Not only could this technique produce electricity, it could also serve as a form of planetary air conditioning to counter global warming. (Read
the complete story)
|"There may be an application already waiting. "Beyond Invention" a TV Program showcased an Au... | <urn:uuid:3b6dcbd7-c6c8-4f31-9b0a-f39ed456a97f> | 2.8125 | 859 | Comment Section | Science & Tech. | 52.995056 |
What Time is it?
Sometimes measuring time in millisecond resolution just isn’t accurate enough. Together with industry and community leaders, the W3C Web Performance working group has worked to solve this problem by standardizing the High Resolution Time specification.
To solve this issue, the High Resolution Time spec... | <urn:uuid:e98c6eae-3bc1-4d0e-b6a2-31666f6eaaaf> | 2.9375 | 223 | Documentation | Software Dev. | 24.85957 |
cons creates an ordered pair.
cdr return the first and second components,
respectively, of an ordered pair. The function
recognizes ordered pairs.
Ordered pairs are used to represent lists and trees. See any Common Lisp documentation for a discussion of how list constants are written and for the many list processing fu... | <urn:uuid:771a8586-60b5-41e6-82e2-dd0b3edad08d> | 3.3125 | 293 | Documentation | Software Dev. | 81.952824 |
ADO.NET is an evolution of the ADO data access model that directly addresses
user requirements for developing scalable applications. It was designed specifically
for the web with scalability, statelessness, and XML in mind.
ADO.NET uses some ADO objects, such as the Connection and Command objects,
and also introduces n... | <urn:uuid:394c4c3b-b987-4e81-85cc-fae1c2011967> | 2.703125 | 2,127 | Documentation | Software Dev. | 35.141428 |
Could the dream come true? A new study by Stanford researchers suggests that such forecasts may one day be possible—not on Earth, but on the Sun.
"We have learned to detect sunspots before they are visible to the human eye," says Stathis Ilonidis, a PhD student at Stanford University. "This could lead to significant ad... | <urn:uuid:76f88287-3719-49f5-bf98-1048a6ef32a2> | 4.34375 | 740 | Knowledge Article | Science & Tech. | 40.163339 |
Full name: degree Fahrenheit
Plural form: degrees Fahrenheit
Alternate spelling: F
Category type: temperature
Scale factor: 0.555555555556
The SI base unit for temperature is the kelvin.
1 kelvin is equal to 1.8 degree Fahrenheit.
Valid units must be of the temperature type.
You can use this form to select from known u... | <urn:uuid:2f2ca441-4709-4b14-9bf4-d754ea9c9481> | 3.015625 | 125 | Structured Data | Science & Tech. | 48.999167 |
Triangle's default behavior is to find the Delaunay triangulation of a set of vertices. Store the vertices in a .node file, such as spiral.node, illustrated below. The command
triangle spiralproduces the Delaunay triangulation, also illustrated below.
To triangulate a PSLG instead, describe the geometry of the region y... | <urn:uuid:69ebf4e8-b6fb-4b70-9a24-dd9ca952b006> | 2.6875 | 433 | Documentation | Software Dev. | 45.772336 |
- Posted by dan on July 26, 2010
I've been trying to evangelise BDD (Behaviour Driven Development) at work over the past few months and I've had considerably more success than I thought.
So what is BDD?
BDD or Behaviour Driven Development is a development technique that tries to bring together the numerous factions of ... | <urn:uuid:e026add0-09a7-4ec0-b8c8-0ee150853ebf> | 2.84375 | 343 | Personal Blog | Software Dev. | 54.409533 |
Archived:Overview of standard QWidget library on Symbian
Qt provides a rich set of standard widgets that can be used to create graphical user interfaces for applications. Qt’s widgets are flexible and can easily be sub classed to suit specialized requirements.
Widgets are visual elements that are combined to create use... | <urn:uuid:bf1c0584-f744-4896-9b69-2bdc91d35fb3> | 2.84375 | 739 | Documentation | Software Dev. | 42.730765 |
Snakes are of major importance as pest controllers because of their extensive predation on destructive mammals such as rats and mice. Some, like the sea snakes and pythons, are highly regarded as food in Asia but, although most are probably edible, snakes are not widely used for meat. The skin is often used for belts, ... | <urn:uuid:1bc954db-01d5-4c01-87a8-f68304f5d343> | 2.765625 | 129 | Knowledge Article | Science & Tech. | 39.282764 |
Marine Worm Jaws
Marine worm jaws are easily preserved and are known in nearly every system. Most are composed of chitin (fingernail material). They are black and shiny, and have many teeth. Sea worms live today, and the fossil record of worm trails goes back to Precambrian time. The oldest worm jaws are found in Ordov... | <urn:uuid:5f1ed730-2b2d-42bc-8885-f216cdc258e5> | 3.671875 | 167 | Knowledge Article | Science & Tech. | 59.950017 |
int setpgid(pid_t pid, pid_t pgid);
pid_t getpgid(pid_t pid);
pid_t getpgrp(void); /* POSIX.1 version */
pid_t getpgrp(pid_t pid); /* BSD version */
int setpgrp(void); /* System V version */
int setpgrp(pid_t pid, pid_t pgid); /* BSD version */
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
_SV... | <urn:uuid:80c9d12a-db1a-4131-b8b8-97d6cde20b74> | 2.828125 | 1,099 | Documentation | Software Dev. | 63.729484 |
[advance to content]
Click on the Polynomial worksheet set you wish to view below.
What is a polynomial?
A polynomial is a mathematical expression that has three allowed ingredients - constants, variables and exponents.
1/2 MV2 is a polynomial that has 1/2 as a constant, M and V as variables and, on the V, an exponent ... | <urn:uuid:4b07cc64-72a2-42dc-9abf-b7e6d9ac2724> | 4.15625 | 855 | Tutorial | Science & Tech. | 61.84314 |
"AND now, the weather for the next decade." It sounds wildly optimistic, but meteorologists could be offering such forecasts within 20 years.
In Paris last week, researchers from 60 countries unveiled an international programme of research into climate variability called CLIVAR which could help predict the world's weat... | <urn:uuid:81e64c28-f7cd-4062-aaf2-d199b85f961b> | 3.40625 | 214 | Truncated | Science & Tech. | 46.120246 |
Species at Risk
What's so special about Nova Scotia's Blanding's turtles?
In Nova Scotia, the Blanding's turtle is one of our "southern relics" because the population is small, isolated and at the northeastern edge of its range. This reptile, and other southern relics such as water-pennywort, northern ribbon snake and ... | <urn:uuid:db7f5c05-2f8f-4d64-ab84-458d9cf66da4> | 4.125 | 347 | Knowledge Article | Science & Tech. | 46.516085 |
Carbon nanotubes are brimming with possibilities, whether used to strengthen damaged cartilage
, act as a drug delivery mechanism
or create plastic that's as strong as steel
. Some researchers, however, are urging caution in handling these tiny particles, lest they enter the lungs of workers in nanotube manufacturing f... | <urn:uuid:ae1bc8a0-a9f3-4686-8e34-806789c57612> | 3.390625 | 692 | Nonfiction Writing | Science & Tech. | 32.108766 |
by Staff Writers
Washington DC (SPX) Nov 04, 2011
Concerns that global warming may have a domino effect -unleashing 600 billion tons of carbon in vast expanses of peat in the Northern hemisphere and accelerating warming to disastrous proportions - may be less justified than previously thought.
That's the conclusion of ... | <urn:uuid:0a1686d5-3c72-48e7-836b-99014d4a5be8> | 3.703125 | 537 | Truncated | Science & Tech. | 32.033879 |
A plant captures energy from the sun through the photosynthesis process, so when plant material is burned, it is actually releasing the energy from the sun. But unlike solar energy, which is produced by the heat of the sun, we refer to the energy derived from plant material as biomass.
Biomass is considered an importan... | <urn:uuid:e60d8bb6-ba43-4a05-b51c-5d06a849d83f> | 3.96875 | 402 | Personal Blog | Science & Tech. | 38.984009 |
Reducing carbon emissions from deforestation
1st March 2009
We can all agree on what the problem is, it’s settling on a solution that’s the difficult part. Mark Anslow explores the complicated world of deforestation
Do we merely want to preserve the carbon in rainforests, or do we also want to protect them as habitats?... | <urn:uuid:fc700500-8db3-4f52-a4f8-54e9d0e849f7> | 2.796875 | 348 | Truncated | Science & Tech. | 46.085755 |
Edward Lorenz; Pioneer in Creation of Chaos Theory
Thursday, April 17, 2008
Edward N. Lorenz, 90, a meteorologist who laid the groundwork for chaos theory, memorably asking whether the flap of a butterfly's wings in Brazil can set off a tornado in Texas, died of cancer April 16 at his home in Cambridge, Mass. He was an... | <urn:uuid:11882c54-6bc7-4e6f-9165-295a5f2536d8> | 3.234375 | 632 | Nonfiction Writing | Science & Tech. | 47.657114 |
Discovery comes in for a perfect landing.
Click on image for full size
Courtesy of NASA
Shuttle-Mir Program Comes to a Close
News story originally written on June 13, 1998
and Pilot Gorie brought the shuttle Discovery in for a perfect landing yesterday. Discover touched down at 1:00 p.m. CDT on June 12, 1998. This ends... | <urn:uuid:ec9a602e-b37d-4bed-86f8-2499fd9cc637> | 2.890625 | 549 | Content Listing | Science & Tech. | 58.801067 |
Polar Bear. Photo by NPS.
Climate change threatens some of the most treasured natural and historic places in our nation. An example in the Alaska Arctic bioregion that park managers are concerned about is the potential vegetation shift from tundra to shrubland due to warmer temperatures. This vegetation change, combine... | <urn:uuid:9c7fa16c-5654-47a5-9105-b16afeea7a66> | 2.859375 | 105 | Knowledge Article | Science & Tech. | 42.080889 |
[Previous] | [Session 26] | [Next]
L. K. Tamppari (JPL), D. A. Senske (NASA HQ), T. V. Johnson, R. Oberto, W. Zimmerman (JPL), JPL's Team-X Team
Since the arrival of the Galileo spacecraft to the Jovian system in 1995, evidence indicating a liquid water ocean beneath the icy Europan crust has become much stronger. This... | <urn:uuid:aa6dde02-a1b4-4a14-a372-a0c84a52acaf> | 2.984375 | 588 | Academic Writing | Science & Tech. | 31.246 |
Although it may be 'apparent' (it is a harmonic of sorts), the apparentness no means invalidates its importance to weather mechanics. Because the Coriolis effect exists, it causes a weather patterns to spiral and vorteces to build. Without the Coriolis effect, cyclonic systems could not grow and develop. This is why we... | <urn:uuid:a30b952c-4f84-404f-91d2-167e3c70e680> | 3.359375 | 118 | Comment Section | Science & Tech. | 49.460699 |
One of the most common tasks is to generate the flat text of the email message represented by a message object tree. You will need to do this if you want to send your message via the smtplib module or the nntplib module, or print the message on the console. Taking a message object tree and producing a flat text documen... | <urn:uuid:761c5b66-53ec-4f5a-9fe4-1cf8c0b6641a> | 2.75 | 559 | Documentation | Software Dev. | 59.844842 |
By Andrew Howley & Kike Ballesteros
With all our emphasis on charismatic fish and stunning coral formations, boring old algae tends to get skipped over by most observers of the underwater world. Being out here in the South Pacific with an algae expert though, it doesn’t take long to be won over by these intriguingly im... | <urn:uuid:017ab856-37f0-498a-a71f-b0f21e04acb6> | 3.484375 | 649 | Truncated | Science & Tech. | 37.521751 |
Interfaces are the basis of proper composition and shine in relationship with many design patterns (e.g. the Command pattern). As such, they are fundamental to sound OO design. Teach interfaces as the rule and class inheritance as the exception. Class inheritance (extends) is mostly unnecessary and widely misunderstood... | <urn:uuid:9c4b537e-21a1-484b-ae08-9c3e5725f738> | 3.8125 | 259 | Q&A Forum | Software Dev. | 28.318741 |
Plate Boundaries and Volcanoes
and is replicated here as part of the SERC Pedagogic Service.
Course: Geology of the National Parks
I have students work in groups of three or four, studying maps of volcanic activity around the world, on a base map of tectonic plate boundaries. I have each group then classify three to fi... | <urn:uuid:2e522cbe-c463-44b9-9f23-bd4aa66985ab> | 3.3125 | 269 | Tutorial | Science & Tech. | 42.97 |
Acting upon the hint which had been conveyed from various investigations in the domain of physics, and concentrating upon the problem all those unmatched powers of intellect which distinguished him, the great inventor had succeeded in producing a little implement which one could carry in his hand, but which was more po... | <urn:uuid:e6dc781f-6587-409c-8e73-f65627bbce06> | 2.859375 | 1,011 | Audio Transcript | Science & Tech. | 54.165034 |
DNA-RNA Reverse Transcribing Viruses
This tree diagram shows the relationships between several groups of organisms.
The root of the current tree connects the organisms featured in this tree to their containing group and the rest of the Tree of Life. The basal branching point in the tree represents the ancestor of the o... | <urn:uuid:e4ab5c75-b1d2-47aa-918d-54900202620c> | 3.078125 | 244 | Truncated | Science & Tech. | 64.105214 |
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is a backup water
Water is a chemical substance with the chemical formula H2O. A water molecule contains one oxygen and two hydrogen atoms connected by covalent bonds. Water is a liquid at amb... | <urn:uuid:ab5a7e64-90c5-4197-acc0-3121d056deb9> | 3.546875 | 420 | Q&A Forum | Science & Tech. | 43.848601 |
Sarah, after completing all the readings and looking into the two species concepts in detail - what do you think? Do you think one definition or the other has more merit? If scientists are not unified behind the BSC, what do you think of its central role in school textbooks?
You make a great point about numbers. As soo... | <urn:uuid:2b468811-884a-4177-8fba-29537679db2d> | 3.34375 | 1,430 | Comment Section | Science & Tech. | 37.765991 |
We use altitude and azimuth to describe the location of an object in the sky as viewed from a particular location at a particular time.
The altitude is the distance an object appears to be above the horizon. The angle is measured up from the closest point on the horizon.
The azimuth of an object is the angular distance... | <urn:uuid:0b43b302-1e0b-473d-83a5-1a220d68cd3d> | 3.609375 | 141 | Tutorial | Science & Tech. | 37.646667 |
3. The world is warming
- There are three main records of global temperature at the Earth’s surface: the UK Met Office/UEA Climatic Research Unit (CRU) record, a record produced by NASA’s Goddard Institute for Space Studies, and a record produced by the US National Oceanic and Atmospheric Administration (NOAA). The rec... | <urn:uuid:4738ec58-33b4-42c0-bef3-1d0517316b76> | 3.828125 | 1,790 | Knowledge Article | Science & Tech. | 34.098109 |
Brighton Webs Ltd.
Statistics for Energy and the Environment
Monte Carlo Methods - Concept.
If the technique was being named today it would probably be called Las Vegas calculations and the output known as "Vegas Values". Monte Carlo methods are based on random numbers. For a long time, Monte Carlo was one of the best ... | <urn:uuid:ce06781a-4bc5-447a-9882-55726f52f65c> | 3.21875 | 992 | Knowledge Article | Science & Tech. | 44.331897 |
Mail Online “absolutely wrong” to infer global cooling from new research - but that doesn't stop it warning of new ‘Ice Age’
- 09 May 2012, 15:45
- Verity Payne
new research was published in the journal Nature Geoscience
suggesting that a period of low solar activity about 2,800 years
ago was associated with a sudden i... | <urn:uuid:301b0a47-9aa5-4855-8eea-b9af0f1ad2f5> | 2.84375 | 1,158 | Nonfiction Writing | Science & Tech. | 34.26992 |
|Math Skills Review|
The Quadratic Equation
Many times in Chemistry, e.g. when solving equilibrium problems, a quadratic equation results. It has the general form:
There are two roots (answers) to a quadratic equation, because of the in the equation. In most chemistry problems, only one answer will be meaningful and ha... | <urn:uuid:f5996c48-999c-4e5e-a6b6-977785dc1a1e> | 4.09375 | 582 | Tutorial | Science & Tech. | 65.512756 |
pvm_gather - A specified member of the group receives messages from each member of the group and gathers these messages into a single array.
C int info = pvm_gather( void *result, void *data, int count, int datatype, int msgtag, char *group, int rootginst)
Fortran call pvmfgather(result, data, count, datatype, msgtag, ... | <urn:uuid:80d939e4-aa0f-4399-8c08-28c8d67090c5> | 3.25 | 650 | Documentation | Software Dev. | 52.646304 |
I’m not a mathematician (if you are, please send some tips to improve this post), but I saw an interesting math problem going around the internet and I felt like posting my solution. This the the problem as I first saw it:
Everyone seems to have solved this problem looking for a function that relates the two numbers. I... | <urn:uuid:6f5b3a6b-b0b4-4296-97c2-6a55fa1c66dd> | 2.9375 | 849 | Personal Blog | Science & Tech. | 74.745645 |
|Click on the image to enlarge it in a new window|
© Roy Anderson
Click on map to enlarge it in a new window
(Maps updated 30th November 2009)
Agonum muelleri (Herbst, 1784)
Description: A 7-9.5mm long black beetle, with brassy or purplish elytra and bright green reflecting, metallic foreparts. It occurs on open, moder... | <urn:uuid:538852bd-9d15-4c6f-b4fa-57531d7ec2a9> | 2.859375 | 190 | Knowledge Article | Science & Tech. | 37.496667 |
For four decades, Amory Lovins has been a leading proponent of a renewable power revolution that would wean the U.S. off fossil fuels and usher in an era of energy independence. In an interview with Yale Environment 360, he talks about his latest book, which describes his vision of how the world can attain a green ener... | <urn:uuid:2441bebc-4f2d-49f5-9f43-c777749eef23> | 2.84375 | 291 | Truncated | Science & Tech. | 44.485071 |
These changes were already in place 3.5 million years ago. One of our ancient relatives, Australopithecus afarensis, had a remarkably human foot and was clearly already walking around on two legs. Some scientists have taken this to mean that hominins such as Lucy (the most famousA.afarensis specimen) necessarily walked... | <urn:uuid:12c4ac11-3036-47b9-86f8-52a47b300cb8> | 3.359375 | 275 | Truncated | Science & Tech. | 50.829808 |
In the period between 1900 and 1938 (BD) natural selection is complicated by other forces. Though the color of the dark form gives it an advantage over the light, the new trait is introduced into a system of other traits balanced for the light form; thus the dark form is at first at a considerable physiological disadva... | <urn:uuid:a13bf5f2-c437-4c78-ba87-77f0f9635791> | 4.21875 | 819 | Academic Writing | Science & Tech. | 45.573827 |
PostgreSQL is an “Object Relational Database Management System (ORDBMS)”. This database management system (DBMS) is similar to a relational database but with an object-oriented database model: objects, classes and inheritance are directly supported in database schemas and in the query langauge. It supports a large numb... | <urn:uuid:cb964985-aff0-466b-b16d-3d00e01936be> | 3.296875 | 863 | Personal Blog | Software Dev. | 39.664821 |
Of the forces of nature, gravity is probably the least understood. Gravity is everywhere but the mechanism through which it propagates is not known.
Gravity is an effect of mass, it appears. The gravity field can be calculated with good accuracy given the amount and density distribution of a body of matter. Gravity doe... | <urn:uuid:5a46c986-19ad-4241-a964-d2f57be64b9e> | 3.9375 | 835 | Structured Data | Science & Tech. | 38.025181 |
Beware that if your static java.lang.NoClassDefFoundError when you try to access the class which failed to load.block throws Exception than you may get
This shows that static method can not be overridden in Java and concept of method overloading doesn't apply to static methods. Instead declaring same static method on C... | <urn:uuid:cd2f0e81-0a2d-4b6e-b4f7-23b5f773823f> | 3.21875 | 250 | Personal Blog | Software Dev. | 46.749044 |
This module implements pseudo-random number generators for various distributions.
For integers, uniform selection from a range. For sequences, uniform selection of a random element, a function to generate a random permutation of a list in-place, and a function for random sampling without replacement.
On the real line, ... | <urn:uuid:bacff325-c143-4479-860e-11458e78ccc0> | 3.0625 | 2,439 | Documentation | Software Dev. | 55.404131 |
[Tutor] Recursion doubt
reachmsn at hotmail.com
Tue Apr 15 11:12:09 CEST 2008
At the url http://www.python.org/doc/essays/graphs.html there is some code by Guido Van Rossum for computing paths through a graph - I have pasted it below for reference -
Let's write a simple function to determine a path between two nodes. I... | <urn:uuid:7a0796bf-e17d-421b-9ebf-110268812db4> | 2.984375 | 536 | Comment Section | Software Dev. | 76.34438 |
Continuous Solar Spectra
Name: Justin C.
My query is: why is it assumed that the light coming
regions of the Sun contains a continuous spectrum? (This assumption must
made if we are to assume all dark lines are due to absorption at some
in the journey of the light; If light has been absorbed it must have been
there in ... | <urn:uuid:5dc1f5af-0a6b-4fe0-8b38-fae274ec128d> | 3.734375 | 595 | Q&A Forum | Science & Tech. | 32.100353 |
A specially modified helicopter with a boom and winch underneath snags the parafoil chute attached to a model Genesis sample return capsule. The hook on the end of the boom collapses the chute, allowing the helicopter to retrieve the capsule in mid-air.
This photo was taken during successful trials of this novel capsul... | <urn:uuid:2bc1ab2f-d35f-4e86-975d-8780f141e5bb> | 3.03125 | 101 | Truncated | Science & Tech. | 32.647154 |
This table and the accompanying observations were first presented to the Russian Chemical Society in March 1869. (Actually, Mendeleev was ill, and his colleague Nikolai Menshutkin presented his paper [Menschutkin 1934].) The paper was published in the first volume of the new society's journal. That same year, a German ... | <urn:uuid:24d582cc-341b-4fac-90a7-788f5988ac54> | 3.515625 | 2,294 | Academic Writing | Science & Tech. | 42.06142 |
The Society for Conservation Biology recently completed a major overhaul of the SCB website.
The new website provides a wealth of information on recent issues in conservation policy. You can access regular updates on conservation policy news by subscribing to the Policy RSS feed.
Other sections of the website provide i... | <urn:uuid:024b097b-d873-40ff-a86c-6752d2d8e8af> | 2.8125 | 1,642 | Content Listing | Science & Tech. | 21.602507 |
Look up monthly U.S., Statewide, Divisional, and Regional Temperature, Precipitation, Degree Days, and Palmer (Drought) rankings for 1-12, 18, 24, 36, 48, 60-month, and Year-to-Date time periods. Data and statistics are as of January 1895.
Please note, Degree Days are not available for Agricultural Belts
Utah Temperatu... | <urn:uuid:6c400383-6f26-4c5a-88c5-59a731fa6913> | 2.703125 | 135 | Structured Data | Science & Tech. | 52.15599 |
What is a mirage?
Under a baking sun, a weary traveller trudges across a seemingly never-ending expanse of desert. Looking up, he suddenly spots something in the distance: a sparkling lake. He rubs his eyes. It’s still there. Picking up the pace in glee he strides ahead… only for the water to melt into thin air.
You mi... | <urn:uuid:096ac966-f10e-4489-8a36-89f3b9cfd17c> | 3.328125 | 486 | Knowledge Article | Science & Tech. | 62.450788 |
pathChirp is an active probing tool for estimating the
available bandwidth on a communication network path. Based on the
concept of "self-induced congestion," pathChirp features an
exponential flight pattern of probes we call a chirp. Packet
chirps offer several significant advantages over current probing
schemes based... | <urn:uuid:296f37cf-defa-4ea5-afb7-9cd85aa261c1> | 3.25 | 734 | Documentation | Software Dev. | 66.095375 |
Directional wind shear is the change in wind direction with height. In the image (right), the view is looking north. The wind near the surface is blowing from the southeast to the northwest.
As the elevation increases the direction veers (changes direction in a clock-wise motion) becoming south, then southwest, and fin... | <urn:uuid:53eb452d-f69c-4bfc-815a-811c1183d691> | 3.875 | 161 | Knowledge Article | Science & Tech. | 58.15967 |
It uses CSS selectors to access and manipulate HTML elements (DOM Objects) on a web page.
jQuery also provides a companion UI (user interface) framework and a plug-ins.
Many of the largest companies on the Web uses jQuery:
You will find an excellent jQuery Tutorial here at W3Schools.
API is short for Application Progra... | <urn:uuid:171aad97-752d-43cb-b4d0-8ddbfd4d14e1> | 2.75 | 278 | Tutorial | Software Dev. | 51.092352 |
The Weather Channel Position Statement
on Global Warming
The scientific issue of global warming can be broken down into three main questions: Is global warming a reality? Are human activities causing it? What are the prospects for the future?
Warming: Fact or Fiction?
The climate of the earth is indeed warming, with an... | <urn:uuid:c0d53566-cf20-48a5-9602-34aff8a558d8> | 4.09375 | 840 | Knowledge Article | Science & Tech. | 27.803427 |
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Hash tables are an efficient implementation of a keyed array data structure, a structure sometimes known as an associative array or map. If you're working in C++, you can take advantage of the STL map container for keyed arrays implemented using binary trees, but this article will give you some of th... | <urn:uuid:ba48a41f-48b4-41a4-893a-e2a0b147b6d4> | 4.03125 | 214 | Tutorial | Software Dev. | 50.076395 |
Presently, only one supernova has been detected by its neutrinos. This was supernova 1987a, a relatively close supernova which occurred in in the Large Magellanic Cloud, a satellite galaxy to our own. When this star exploded, the neutrinos escaped the surface of the star and reached detectors on Earth three hours befor... | <urn:uuid:a3e8267d-e1e7-495b-82cc-f6e9948e343b> | 4.21875 | 618 | Personal Blog | Science & Tech. | 30.171825 |
The enhanced spectral resolution of hyperspectral and control of bandwidths of multispectral data yield an advantage over color aerial photography particularly when coral health and time series analysis of coral reef community structure are of interest. Depending on the type of instrument, a spectral imaging system can... | <urn:uuid:7095780b-1386-4251-89b1-48bf6d8d10bd> | 2.75 | 239 | Documentation | Science & Tech. | 54.662121 |
Processing Arithmetic Expressions with the Shunting-Yard Algorithm
(Originally posted on reedbeta.com)
In game development (or programming in general) it’s not uncommon to have a situation where you’d like to let a user enter an arithmetic formula that your code parses and evaluates. For example, in a shader you might ... | <urn:uuid:a9742f90-8b2f-48ec-892e-ab7146c20ff0> | 2.90625 | 2,217 | Comment Section | Software Dev. | 44.257128 |
Is there a simple explanation of what the Laplace transformation do exactly and how they work? Reading my math book has left me in a foggy haze of proofs that I don't completely understand. I'm looking for an explanation on lamans terms so that I understand what it is doing as I make these seemingly "magical" transform... | <urn:uuid:2b0aae17-5e35-4201-9a2f-797c08432274> | 2.859375 | 110 | Q&A Forum | Science & Tech. | 54.204235 |
Whats in a Name? Bumps, Bights, Scarps and Shelves
Steve Gittings, Research Coordinator
U.S. National Marine Sanctuary System
You may have seen an old cartoon that shows some elderly ladies sitting around a coffee table chatting, and one says to the other with a deadpan look, I dont know why I dont care about what live... | <urn:uuid:0378c519-622e-45f1-8f9e-1589733494f5> | 2.96875 | 1,599 | Knowledge Article | Science & Tech. | 34.510898 |
El Niño and its partner La Niña, the warm and cold phases in the eastern half of the tropical Pacific, play havoc with climate worldwide. Predicting El Niño events more than several months ahead is now routine, but predicting how it will change in a warming world has been hampered by the short instrumental record. An i... | <urn:uuid:03cc3534-f1fc-42df-8b04-02922d247c16> | 4 | 722 | Knowledge Article | Science & Tech. | 29.710155 |
Learn PHP Bitwise Operator:
It is another kind of operator ,called bitwise operator and supported by PHP. It is so called because instead of operating on the integer value, it works on the binary number, like if we want to perform the following task,
12>>2, then :
0000 1100 >> 2:
After first shift, 0000 0110 and after ... | <urn:uuid:4331bda4-a92b-4ec2-9482-2ef10602a0c1> | 3.671875 | 377 | Documentation | Software Dev. | 85.122479 |
This movie shows one of the most beautiful – and mind-boggling – experiments in physics: particles behaving as waves as they pass through a diffraction grating.
Each speck of light represents a single molecule that has passed through the grating. If the molecules obeyed the laws of classical physics – the laws that des... | <urn:uuid:9bc250d2-928d-4261-8119-81a13262d3e9> | 2.875 | 315 | Personal Blog | Science & Tech. | 48.501483 |
Because of the simplicity of geometry and principle of functionality bubble columns are often used
for chemical and biological reactors.
The example shown here investigates the accuracy of 2-D models by comparing numerical predictions
with experimental observations.
The gas mass flow rate is increased from left to righ... | <urn:uuid:3b1c7c26-c20c-4d8e-a42d-e5f4ace6a0cb> | 2.78125 | 116 | Knowledge Article | Science & Tech. | 48.208403 |