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This paper by the International Energy Agency considers all direct forms of solar energy and assessing resource potential, technology status, and supporting policies.
The radiative energy from the Sun that keeps our planet warm exceeds by far the current primary energy supply used by mankind for its comfort, leisure an... | <urn:uuid:7f6f6aa2-dc4c-488e-81d1-662f1c30abdc> | 3.21875 | 148 | Academic Writing | Science & Tech. | 22.798656 |
The oxidation state of an atom or ion is the number of electrons that are taken away or given to it. Positive oxidation states are electrons taken away and negative oxidation states are electrons given. When tin dissolves in sulfuric acid to make tin(II) sulfate, the tin loses two electrons and becomes a Sn2+ ion, whic... | <urn:uuid:9e2193b7-524b-4cb8-84c4-aeb5d9799290> | 3.765625 | 109 | Knowledge Article | Science & Tech. | 45.685 |
Could you help me with this homework please.. 105.0 g of water is in a Styrofoam calorimeter of negligible heat capacity. The initial T of the water is 17.1oC. After 288.2 g of an unknown compound at 77.0oC is added, the equilibrium T is 25.1oC. What is the specific heat of th...
Make a tree diagram of all the possible... | <urn:uuid:5f20c132-301a-4839-99ca-ceccac3cef7b> | 3.03125 | 367 | Q&A Forum | Science & Tech. | 102.118058 |
by Ian Oeschger
|Other articles in this feature:|
What Does XUL Have to Do With XML?
XUL Syntax and Rules
XUL (eXtensible User-Interface Language)is a standards-based interface definition language. It attempts to balance precise control of layout with flexibility and ease of use, and in this respect it does a great job... | <urn:uuid:8cd52325-bc9e-4e91-a6e3-71b746063d3c> | 2.890625 | 455 | Truncated | Software Dev. | 59.139013 |
*Note: This is an abbreviated Project Idea, without notes to start your background research, a specific list of materials, or a procedure for how to do the experiment. You can identify abbreviated Project Ideas by the asterisk at the end of the title. If you want a Project Idea with full instructions, please pick one w... | <urn:uuid:672b45cb-d35d-4720-8a06-93d4536f440f> | 3.90625 | 627 | Tutorial | Science & Tech. | 49.824194 |
Blimp Swims Through Air Like A Fish
A blimp that swims through the air like a fish has been created by Swiss researchers. The fish-like airship uses artificial muscles made from electroactive polymers (EAPs) to propel itself forward.
(Diagram of Electroactive-polymer artificial muscle 'trout' blimp)
Empa researcher Sil... | <urn:uuid:982abfce-cfe9-4f8a-942e-76b81da2edc9> | 3.15625 | 1,389 | Content Listing | Science & Tech. | 57.679162 |
Click on any phrase to play the video at that point.Close
I thought I would talk a little bit about how nature makes materials. I brought along with me an abalone shell. This abalone shell is a biocomposite material that's 98 percent by mass calcium carbonate and two percent by mass protein. Yet, it's 3,000 times tough... | <urn:uuid:705a469d-bbc9-4cd9-88e2-520946804dce> | 3.109375 | 2,583 | Audio Transcript | Science & Tech. | 55.20871 |
Raising Giant Insects to Unravel Ancient Oxygen
Denver CO (SPX) Nov 02, 2010
The giant dragonflies of ancient Earth with wingspans of up to 70 centimeters (28 inches) are generally attributed to higher oxygen atmospheric levels in the atmosphere in the past. New experiments in raising modern insects in various oxygen-e... | <urn:uuid:832d6d3f-ce9d-4094-92e5-7b684857a7fe> | 3.5 | 1,286 | Truncated | Science & Tech. | 35.610664 |
Description | Distribution and Movements | Biology and Life History | Feeding Ecology | Natural Predators | Associated Fishes | Conservation
Whale Shark Biology and Life History
Information on the biology and life history of whale sharks is scant at best. Because of their migratory behavior and their pelagic lifestyle,... | <urn:uuid:07319907-f3fa-4dd7-9e8c-f7ba94237f80> | 3.890625 | 1,122 | Knowledge Article | Science & Tech. | 67.842429 |
Building of "Mir" Space Orbital Station in Space was initiated on February 20th, 1986 with the launch of Base Block. Later there were launched all other modules "Kvant", "Kvant-2", "Crystal", "Spectr", docking block for STS Space Shuttle and "Priroda" module.
All the modules were equipped with different instruments for... | <urn:uuid:9f451121-ae86-47d1-86f6-dd9cfe43d91a> | 3.203125 | 466 | Knowledge Article | Science & Tech. | 49.57877 |
The Wonder of Woodland Savannahs
By Shawn Head
When I saw my first savannah in 1990 on the Monongahela National Forest, I was amazed not only by its size but how good it looked as functional wildlife habitat. While hunting this same area in the fall, I found the amount and kinds of wildlife that were using it even more... | <urn:uuid:75ef30ed-49c7-4db1-9a19-18d754aa9d79> | 3.1875 | 1,542 | Nonfiction Writing | Science & Tech. | 30.594726 |
Question: Why Genetics?
Pardis Sabeti: Well, genetics is kind of like that perfect balance between math and biology so- It’s so-- It’s understanding the natural world and these principles going on in it but using a mathematical framework in order to understand the process so it’s for me perfect. It’s exactly the kinds ... | <urn:uuid:b7c06800-770e-4b07-80eb-90b09862b75f> | 2.828125 | 737 | Audio Transcript | Science & Tech. | 49.289797 |
The most recently observed stellar explosion in our neighborhood
was Kepler’s supernova, spotted 400 years ago.
Scientists using a telescope atop a Hawaiian volcano have detected a pair of extra-bright supernovae, or star explosions, one of which is the oldest, most-distant supernova ever detected.
That explosion occur... | <urn:uuid:137ea3d9-aea7-457c-9da2-90393711145f> | 3.71875 | 2,590 | Content Listing | Science & Tech. | 45.915025 |
Hoar Frost and Rime Ice: What’s the Difference?
The New Year dawned cold in the badlands of South Dakota. Temperatures in the low single digits at sunrise on January 1 warmed to a balmy 30°F by midday. The sunny, calm conditions were perfect for my first hike of 2013. I hadn’t walked fifty feet from the trailhead, howe... | <urn:uuid:767861f3-4fe9-4280-975b-8014b522e815> | 3.34375 | 1,471 | Personal Blog | Science & Tech. | 61.117737 |
Tag: Featured Research
Scientists use satellite data from the CERES instrument to simulate cloud effects and improve the accuracy of global climate models.
Researchers develop a long-term archive of satellite data that will help hydrologists monitor floods, allow aid agencies to pinpoint flood-prone regions, and provid... | <urn:uuid:7491ef7c-bf81-4d14-a3a8-0d014ddd9aba> | 3.296875 | 371 | Content Listing | Science & Tech. | 36.491139 |
I was looking through one of the past Advanced Physics exam papers and I came across a question which is a little confusing at the end (the answer that is):
Consider a forced, damped simple harmonic oscillator, which obeys the equation ofmotion:
a) First consider the un-driven case ( )
Using the substitution
where A is... | <urn:uuid:90e6ee58-1adc-4db2-ba55-f762afdb25d9> | 2.6875 | 494 | Q&A Forum | Science & Tech. | 52.053942 |
It was late in the northern martian spring
when the HiRISE camera onboard the Mars Reconnaissance Orbiter
this local denizen.
Tracking south and east (down and right)
across the flat, dust-covered
the core of the
whirling dust devil is about 30 meters in diameter.
Lofting dust into the thin
atmosphere, its plume
reache... | <urn:uuid:44bb7b49-77c2-4a5d-ad07-aafacf4e6bc0> | 3.671875 | 173 | Knowledge Article | Science & Tech. | 50.726164 |
The delightful Dark Doodad Nebula drifts
through southern skies,
a tantalizing target for binoculars in the constellation
Musca, The Fly.
The dusty cosmic cloud
is seen against rich starfields just south of the
Coalsack Nebula and the Southern Cross.
Stretching for about 3 degrees
this scene the Dark Doodad
seems punct... | <urn:uuid:20aeb143-d424-4e2d-b9da-140076a7fb37> | 2.796875 | 233 | Knowledge Article | Science & Tech. | 45.739526 |
Determination of nitrate ion levels in water samples by use of an ion selective electrode.
Many recent developments in analytical measurement are based on methods utilizing ion selective electrodes. In many applications, ion selective electrode methods are being substituted for existing analytical methods with resultin... | <urn:uuid:5f4421c4-d1bd-4b36-8135-cd0cb593f71b> | 3.046875 | 2,503 | Tutorial | Science & Tech. | 43.019015 |
Study: Greenhouse Gas Emissions Have Caused Irreversible Effects on Sea-Level Rise
October 2, 2012 7:47 PM
comment(s) - last by
Emissions up until this point have ensured an irreversible sea-level rise of 1.1 meters by the year 3000
A new study has found that it's too late to reverse the
effects that greenhouse gas emi... | <urn:uuid:04e494aa-ca97-4d09-a1f6-02dfced6d896> | 3.234375 | 1,888 | Comment Section | Science & Tech. | 62.849992 |
Posted September 1st, 2002
It's like "something from a bad horror movie"! This is how Maryland's Interior Secretary Gale Norton described the most widely reported environmental emergency
The emergency? The Asian snakehead fish.
The snakehead is an intriguing fish native to China. They have a voracious appetite, gobblin... | <urn:uuid:4aa05ed6-d927-4e41-b046-bfb31355608b> | 3.203125 | 593 | Knowledge Article | Science & Tech. | 47.073214 |
MessageToEagle.com - First observation of predator avoidance behavior by phytoplankton was made by researchers at the University of Rhode Island's
Graduate School of Oceanography.
While studying microscopic marine plants and their behavior in confrontation to the predatory zooplankton Favella sp, researchers
noticed th... | <urn:uuid:cc55d681-d9ce-4446-a5db-c75e3bc6e8c6> | 3.984375 | 1,094 | Content Listing | Science & Tech. | 43.503111 |
PLATE 2 New images of ocean color from the SeaWlFs instrument. The upper panel shows a high resolution of the coastal oceans off northeastern North America. The lower panel shows a global view. Ocean “color” measures the density of photosynthetic pigments in marine organisms (phytoplankton). This information, the first... | <urn:uuid:ac965b79-4c21-4921-8402-7cb4cb8e4bca> | 3.203125 | 128 | Knowledge Article | Science & Tech. | 48.914439 |
Thu Jan 10 12:57:49 GMT 2008 by Robert Price
That's huge !
I think black holes are how new universes are created.
The big bang was supposedly the start of our universe. I understood that energy cannot be created or destroyed only changed. Surley the big bang can't happen just like that (it had to have started out from ... | <urn:uuid:8420e13a-bcc9-498e-ba4b-a42a486dc8f5> | 2.765625 | 2,174 | Comment Section | Science & Tech. | 64.828298 |
Tucson Botanical Gardens (Butterfly Magic at the Gardens)
Canon Powershot sx100is
Source~ Wikipedia, the free encyclopedia
The Cairns Birdwing (Ornithoptera euphorion) is Australia’s largest endemic butterfly species.
Females have a wingspan reaching of up to 16 cm, males are usually a few centimeters smaller.
Males ha... | <urn:uuid:e1e9227f-c462-466b-9ec1-306f04e98c44> | 2.953125 | 317 | Knowledge Article | Science & Tech. | 32.912051 |
The study, "A Route to Enantiopure RNA Precursors from Nearly Racemic Starting Materials," shows how the precursors to RNA could have formed on Earth before any life existed. It was authored by Jason E. Hein, Eric Tse and Donna G. Blackmond, a team of researchers with the Scripps Research Institute. Hein is now a chemi... | <urn:uuid:1a767371-b915-43bf-8690-db2e851e5ffc> | 4.03125 | 240 | Academic Writing | Science & Tech. | 37.59364 |
Background information and genetic sequencing data for more than 1,000 individual field isolates of the fish virus Infectious Hematopoietic Necrosis Virus (IHNV) collected in western North America from 1966 to the present, updated annually.
The electric power generation potential from identified geothermal systems is 9... | <urn:uuid:f5e0f96d-b75c-4c41-8f1a-4f35389c2203> | 3.21875 | 1,303 | Content Listing | Science & Tech. | 31.667298 |
This is the sort of question that should be considered from more than one direction. Clearly this is a speculative scenario, so take it as a given that there is a lot of 'what if' here.
I doubt we can do entirely without bacteria - as you say most of the essential nutrients come from bacteria, who fix nitrogen. If only... | <urn:uuid:279ea820-c8dc-49fb-b220-a2551b7cdb40> | 3.25 | 411 | Q&A Forum | Science & Tech. | 54.276341 |
In this PHP tutorial you will learn how to post variables from a HTML form to another PHP page.
Posts Tagged ‘program’
A basic introduction to PHP. PHP is an open-source programming language which is widely used in the web today. It allows you to create dynamic websites and pages driven by database results. XAMPP is an... | <urn:uuid:66099970-f945-467f-9987-1304744b0bc4> | 2.71875 | 321 | Tutorial | Software Dev. | 71.595957 |
New Jersey and Earth warmer than normal in October
New Jersey and the planet were warmer than average in October, according to experts.
Last month was the 20th warmest October in the Garden State since 1895, according to our state climatologist. The mercury averaged 57.1 degrees – 2.3 degrees above average.
October was... | <urn:uuid:078bad56-f19c-4d69-96b4-68ff7238fa42> | 2.734375 | 199 | Personal Blog | Science & Tech. | 43.763 |
||This article needs additional citations for verification. (July 2010)|
Horse-fly is the most widely-used English common name for members of the family Tabanidae. Apart from the common name "horse-flies", broad categories of biting, bloodsucking Tabanidae are variously known as breeze flies, clegs or clags, deer flies... | <urn:uuid:c994b5a5-2b2e-45e3-a5cc-ea2d60773f51> | 3.140625 | 1,117 | Knowledge Article | Science & Tech. | 36.233348 |
Brief SummaryRead full entry
North American Ecology (US and Canada)Junonia coenia is native to the southern United States and coastal California, and migratory throughout most of the rest of the states and into southern Canada (Scott 1986). Habitats are subtropical to upper Sonoran and upper austral zone in open areas ... | <urn:uuid:6cca2e3d-105d-4929-a15b-a1b8531104dc> | 3.359375 | 166 | Knowledge Article | Science & Tech. | 26.490708 |
Neutrons are not made of an electron, antineutrino and a proton. However, you can get those out of a neutron through beta decay. Neutrons are made of an up quark and 2 down quarks. The quarks do have electrical charge (up = +2/3, down = -1/3. The third is purely due to the long history of calling electrons -1 and proto... | <urn:uuid:713bc62f-fead-43cc-a7c7-41971546cba5> | 3.828125 | 1,086 | Comment Section | Science & Tech. | 56.306441 |
Ring galaxies are dramatic examples of galaxy transformation caused by a remarkably simple interaction. Observations and numerical models (Lynds & Toomre 1976) argue persuasively that these objects are formed by the near central passage of a companion through a spiral along the rotation axis. The brief additional gravi... | <urn:uuid:ed60b0ad-dc3d-4d2e-af3e-81e73aa825b2> | 2.796875 | 140 | Academic Writing | Science & Tech. | 30.254789 |
What happens to the area of a square if you double the length of
the sides? Try the same thing with rectangles, diamonds and other
shapes. How do the four smaller ones fit into the larger one?
Building up a simple Celtic knot. Try the interactivity or download
the cards or have a go on squared paper.
A magician took a ... | <urn:uuid:0f9e788d-0396-4490-aad2-8c37e48edb0e> | 3.015625 | 1,352 | Content Listing | Science & Tech. | 73.297666 |
Law of Demeter (LoD)
The Law of Demeter was originally formulated as a style rule for
designing object-oriented systems. “Only talk to your immediate friends”
is the motto. The style rule was discovered at Northeastern University
in the fall of 1987 by Ian Holland.
A more general formulation of the Law of Demeter is: E... | <urn:uuid:49c69e8a-c901-428f-9976-e4d5a40cfb98> | 3.3125 | 371 | Personal Blog | Software Dev. | 39.371671 |
Teaching with the Show
Visualizations of the Sun and Earth are created from observations made by scientists using both ground-based and space-based telescopes.
To support a class discussion after viewing Journey to the Stars
, you may wish to review the main content points from each section of the show and then use the... | <urn:uuid:c9bf7fa8-cb82-449b-8ab6-15c1c99567f2> | 3.90625 | 1,045 | Tutorial | Science & Tech. | 59.845157 |
How much of
Jupiter's moon Europa is made of water?
A lot, actually.
Based on the
Galileo probe data acquired during its
of the Jovian system from 1995 to 2003, Europa posses a deep, global
ocean of liquid water beneath a layer of surface ice.
The subsurface ocean
plus ice layer could range from 80 to 170
kilometers in... | <urn:uuid:65adcc21-a3c0-41e9-abc8-8ab99d498467> | 3.640625 | 199 | Knowledge Article | Science & Tech. | 48.961544 |
Impacts: Wild hogs, or wild boars, were introduced
400 years ago for hunters. Today the species has spread to
23 states and its total population numbers more than two million.
Florida has the second largest population of approximately
This species is extremely damaging to the agricultural industry
costing the industry ... | <urn:uuid:4c114600-b15e-4e2d-94dd-140cfde7a67d> | 3.765625 | 166 | Knowledge Article | Science & Tech. | 41.791607 |
See more in our image gallery: "Who needs sex? Six animals that cloned alone"
JUST over a decade ago, a baby hammerhead shark slipped silently from its mother's belly into the welcoming waters of the aquarium at the Henry Doorly Zoo in Nebraska, creating ripples that are still spreading around the world. The mother had... | <urn:uuid:34936bb8-6563-44ff-b775-7e950916f1bb> | 3 | 203 | Truncated | Science & Tech. | 55.653571 |
Along with hosting a supermassive black hole at its heart, the center of the radio-loud galaxy Centaurus A is home to a stellar nursery that tells a tale of the galaxy’s past. The presence of a dark band of dust, as well as the galaxy’s powerful emissions in the radio end of the spectrum, suggest it formed in a collisi... | <urn:uuid:3ad3f17f-f7d0-4ed8-9ee9-f6b8000da5f7> | 3.21875 | 362 | Truncated | Science & Tech. | 43.865335 |
Web edition: August 24, 2012
Print edition: September 8, 2012; Vol.182 #5 (p. 26)
A fundamental problem for almost all science is how to tell a fluke from a fact.
It’s usually very hard to know whether an experiment’s result reflects a truth of nature or a random accident. So scientists use elaborate math to gauge the ... | <urn:uuid:2036139f-a2de-4f20-a279-8a0c25ad42d8> | 3.765625 | 2,812 | Truncated | Science & Tech. | 32.357975 |
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.
March 30, 1997
Explanation: One of the most unusual galaxies known, Centaurus A, is pictured above. Cen A is marked by dramatic dust lanes that run ... | <urn:uuid:5c20454c-0bbe-4c69-973c-4a8e2e2659d5> | 3.84375 | 197 | Knowledge Article | Science & Tech. | 49.782582 |
Treating wastewater is expensive: to get rid of organic matter, phosphates, and nitrogen compounds that farms and cities release into rivers, you need to pump the water through costly complexes of pumps, filters, and tanks. A tidal marsh, on the other hand, does the same job free of charge. The polluted water fertilize... | <urn:uuid:0cc9bf1f-e551-4cdb-9023-e2cb09b84187> | 3.65625 | 704 | Nonfiction Writing | Science & Tech. | 49.012114 |
Bioluminescence is the production and emission of light by a living organism. Bioluminescence occurs widely in marine vertebrates and invertebrates, as well as in some fungi, microorganisms and terrestrial invertebrates. Some Symbiotic organisms carried within larger organisms produce light.
Bioluminescence is a form o... | <urn:uuid:d21dd537-f8a2-45a0-8801-30af1474e7b2> | 4.0625 | 2,560 | Knowledge Article | Science & Tech. | 48.319457 |
Photograph courtesy Zeb Hogan
- Average life span in the wild:
- Up to 50 years
- Up to 23 ft (7m)
- Up to 1,000 lbs (450 kg)
- Group name:
- Protection status:
- Did you know?
- The Chinese paddlefish is sometimes called the elephant fish because of its long snout.
- Size relative to a bus:
No young Chinese paddlefish... | <urn:uuid:40ae829a-4525-4182-a5ac-b26456ca54ad> | 3.171875 | 651 | Knowledge Article | Science & Tech. | 46.00157 |
Metal abundances have been estimated for less than a dozen absorption line systems. The main impediment is the scarcity of systems which show enough lines from enough ions to allow simultaneous estimates of both ionization and abundances. Difficulties are also encountered with inadequate spectral resolution, line blend... | <urn:uuid:9428b94f-bc6a-4a93-a914-d976d50067c8> | 2.765625 | 994 | Academic Writing | Science & Tech. | 38.81321 |
Motorcycles and Coriolis Effect
Name: Ralph B.
I teach a motorcycle course and I understand about
countersteering and the physics that go into it. My question focuses on
the idea of the Coriolis effect and how it effects motorcycle turning. In
the northern hemisphere we notice that riders can make turns to the left
eas... | <urn:uuid:1708a29c-90c0-4a5e-be89-f320e74401c8> | 2.796875 | 855 | Comment Section | Science & Tech. | 58.988802 |
Use the number weights to find different ways of balancing the equaliser.
Can you hang weights in the right place to make the equaliser
Can you work out how to balance this equaliser? You can put more
than one weight on a hook.
If you have only four weights, where could you place them in order
to balance this equaliser... | <urn:uuid:b1cfbbd3-cd86-42bf-ae5f-a5bba6012171> | 3.609375 | 570 | Content Listing | Science & Tech. | 64.462538 |
As we know that the Session is used to maintain the session between request. Session object is responsible to hold the conversational state across multiple requests.
The listener HttpSessionAttributeListener is an interface and extends the java.util.EventListener class. This listener will be called by the container whe... | <urn:uuid:ddbd11d8-326a-4281-acd5-c7b6935e5878> | 2.984375 | 304 | Documentation | Software Dev. | 45.081975 |
A time series of daily larval production at hatching /10m2 of Pacific hake (Merluccius productus), also called Pacific whiting, from 1951-2005 was constructed based on data collected from CalCOFI surveys off the coast from San Diego to San Francisco in January – April, the peak spawning time of Pacific hake. This area ... | <urn:uuid:49176427-bf3f-47a2-9d59-7c1ce37e6470> | 3.15625 | 279 | Knowledge Article | Science & Tech. | 46.860584 |
There’s another sense in which the rational numbers are lacking and the real numbers fix them up. This one is completely about the order structure on , and will lead to another construction of the real numbers.
Okay, so what’s wrong with the rational numbers now? In any partial order we can consider least upper or grea... | <urn:uuid:13248cd6-1806-4610-8dfe-5b357dd2649f> | 2.8125 | 990 | Personal Blog | Science & Tech. | 60.401436 |
It's now apparent that the water cycle rate has already increased 4% between 1950 and 2000, twice the rate predicted by models. Hence our recent epic droughts, wildfires, and floods.
...the rate of intensification of the global water cycle is happening far faster than imagined: at about 8 percent per degree Celsius of ... | <urn:uuid:9bf7c915-89e6-4ec4-8f7b-687f54d08eef> | 3.515625 | 197 | Comment Section | Science & Tech. | 46.201212 |
question about the FizzBuzz testYea ok, I just wrote the program with cout<< instead... why do people even use printf???
question about the FizzBuzz testHi, I am a new programmer and I found out about a somewhat funny test they give people for jobs that...
Parsing code please helppls im gonna fail my cless
Parsing code... | <urn:uuid:9d97d886-c3bb-47ff-9fb6-aa060630f359> | 2.703125 | 122 | Q&A Forum | Software Dev. | 64.310733 |
Reads a file as a SAS XPORT format library and returns a list of data.frames.
- character variable with the name of the file to read. The file must be in SAS XPORT format.
If there is a more than one dataset in the XPORT format library, a named list of data frames, otherwise a data frame. The columns of the data frames... | <urn:uuid:6499988f-2023-42b2-af25-e03af508b8d0> | 2.828125 | 259 | Documentation | Software Dev. | 64.457556 |
The systematic control of crystal growth in microgravity gives insight into the physical laws by which matter organizes itself. The Binary Colloidal Alloy Test - 5: Seeded Growth (BCAT-5- SeededGrowth) experiment studies how the “rules” for the crystallization of microscopic particles (known as colloids) suspended in l... | <urn:uuid:020f0f28-e109-48b4-9870-c7b92b936213> | 2.96875 | 1,265 | Knowledge Article | Science & Tech. | 41.091786 |
Magnetism "Big Idea"
What is the BIG IDEA in SCIENCE that would be most
appropriate to link a unit on magnets with kindergarten students?
I cannot say for sure, but I can conceive of a reason I might
consider reasonable. Due to the great increase in the depth and
breadth of technology in past years, science at the leve... | <urn:uuid:26c1fec4-ac29-43eb-a61e-4b71d2604b47> | 3.390625 | 812 | Comment Section | Science & Tech. | 50.340481 |
There are three lessons in the Atmosphere
is an important gas composed of three oxygen atoms.
Find out how ozone protects the Earth and people.
Discover which gases and processes are causing the
greenhouse effect and what will happen in the future.
Find out all about what is happening on the sun and
how it affects us h... | <urn:uuid:7177259d-effb-4e6d-87fe-ee2090c082c5> | 3.3125 | 107 | Content Listing | Science & Tech. | 51.057289 |
Ciénega Wetland Rehabiliation at Phantom Lake Spring,
Phantom Lake Spring is a unique, spring-fed wetland system (ciénega) that supports five aquatic species of concern: two endangered fishes and three candidate invertebrates. Spring flow at Phantom Lake Spring has been continually declining in measurements recorded si... | <urn:uuid:f6ce85dd-8e89-4d60-8ca3-ffebcc075d5b> | 3 | 253 | Knowledge Article | Science & Tech. | 31.069331 |
NASA eClips™: Wind Tunnels in Action
Target: Grades K-5
Length: 5 minutes 33 seconds
NASA eClips™: Our World
View video →
Join NASA scientists and engineers at NASA's Langley Research Center in Hampton, Va., one of the most extensive wind tunnel facilities in the world, as they study air flow around objects at differen... | <urn:uuid:c18b6fad-721b-448c-9d15-b427a6c9faa2> | 3.046875 | 95 | Truncated | Science & Tech. | 59.1 |
The Nikola Tesla biography recognizes a genius of his time and one of the innovators in electrical engineering.
Much of his work can be seen today even after 60 years of his death. Tesla is recognized as one of the pioneers of electricity, wireless and X-Ray technologies who worked with Thomas Edison and George Westing... | <urn:uuid:497980dd-0c9a-4db3-b30c-f7e88dd3fb51> | 2.828125 | 603 | Personal Blog | Science & Tech. | 43.208892 |
Scientific name: Adscita statices
Flies by day in sunshine from mid May to July.
Superficially similar to the Scarce Forester (A. globulariae) and Cistus Forester (A. geryon), care being needed to separate these species. Often found feeding at flowers, such as those of Devil's-bit Scabious, Field Scabious and Marsh Thi... | <urn:uuid:47219118-a13c-420c-9582-e187e3f87a42> | 3.1875 | 291 | Knowledge Article | Science & Tech. | 36.162615 |
Learn about the history of science by reading about the significant scientific events that took place on this day in history.
1971 - Mariner 9 spacecraft becomes first to orbit another planet.
NASA's Mariner 9 spacecraft entered orbit around Mars to become the first spacecraft to orbit another planet. Mariner 9 was des... | <urn:uuid:e4bbc861-5122-464e-ae11-462cc4940b58> | 3.734375 | 280 | Listicle | Science & Tech. | 41.673448 |
This message was edited by the Moderator at 2002-4-1 16:52:55
I'm having difficulty with the Format function. I have created some code to figure the averages of a set of inputs. When I type my code, I want the numbers to be in the format "0.00" but if the average ends up being a whole number (integer), the code will no... | <urn:uuid:3533b73d-ba05-4414-9208-7803db935439> | 2.6875 | 315 | Comment Section | Software Dev. | 65.47404 |
The void keyword is used to denote functions that return no value, or generic pointer
variables which can point to any type of data. Void can also be used to declare
an empty parameter list. Also see the data types page.
Related Topics: char, double, float, int, long, short, signed, unsigned, wchar_t | <urn:uuid:d1b03b25-aa37-49bd-afa7-74117bb3886b> | 2.734375 | 72 | Documentation | Software Dev. | 49.326282 |
A cloaking device is a theoretical or fictional stealth technology that can cause objects, such as spaceships or individuals, to be partially or wholly invisible to parts of the electromagnetic (EM) spectrum.
Fictional cloaking devices have been used as plot devices in various media for many years.
Developments in scie... | <urn:uuid:fec524c0-bfed-42cc-b8bb-55e10b786b93> | 3.4375 | 1,102 | Knowledge Article | Science & Tech. | 39.275 |
Molecular Biology and Genetics
Statistics of barcoding coverage
|Specimen Records:||1||Public Records:||1|
|Specimens with Sequences:||1||Public Species:||1|
|Specimens with Barcodes:||1||Public BINs:||1|
|Species With Barcodes:||1|
Dibamidae is a family of legless lizards found in tropical forests. Relatively little i... | <urn:uuid:c36b6b8a-b19c-456d-8e8f-afe35edd4235> | 3.1875 | 388 | Knowledge Article | Science & Tech. | 53.560441 |
posted by: Tom Loughran
The central nervous system coordinates the flow of information from all parts of the bodies of animals (almost all parts, in almost all animals.) Think of it as the information management system of your brain, including especially the nerves running along the spinal cord. It is intimately involv... | <urn:uuid:35c45c24-c3d9-452b-8190-b110836643cf> | 3.234375 | 436 | Personal Blog | Science & Tech. | 40.553521 |
Mn-1 Chaotic Double Pendulum
Published: Thursday 09 March 2006 - Updated: Thursday 24 March 2011
To demonstrate a double pendulum with chaotic motion.
Double pendulum as illustrated
Click on pictures to enlarge.
Chaotic Pendulum 1
Chaotic Pendulum 2
The double pendulum demonstrates the chaotic unpredictable behavour th... | <urn:uuid:52851d06-9cfe-471d-b1bc-dce10b5fcf03> | 3.046875 | 228 | Tutorial | Science & Tech. | 34.619405 |
Transcripts of Space Place Musings
Narrator: Welcome to Space Place Musings, where an expert answers questions from our Space Place museum partners across the nation. I'm Diane Fisher of the New Millennium Program. Our expert is Dr. Marc Rayman, a scientist at the Jet Propulsion Laboratory.
Marc, we have heard from the... | <urn:uuid:32c5950d-3bfd-4433-b6b3-acbb3392c089> | 3.53125 | 1,076 | Audio Transcript | Science & Tech. | 58.638107 |
In the beginning, there was Chaos...
In the early days of software development, everyone did their own thing. Hardware was scarce and software projects were small. But soon, when multi-programmer projects became common, configuration- and change-control problems started rearing their ugly heads. When two programmers tr... | <urn:uuid:2130add6-b3bf-4499-9219-bcb59e223375> | 2.921875 | 776 | Academic Writing | Software Dev. | 45.608426 |
Science Fair Project Encyclopedia
(Need disambiguation here):
The Metron is a unit of surface area used in Heim Theory and is analagous to the branes of string theory. It has dimension approximately equal to the Planck length squared (h*h), or 10 **-70 m**2. The term is in use in this context since the 1950s and so pre... | <urn:uuid:1b3a5196-caa6-437e-b648-155b9c3815e2> | 2.796875 | 200 | Knowledge Article | Science & Tech. | 53.491857 |
Earthquake Faults Help
The sudden slip that is an earthquake takes place after a gradual buildup of stress inside the Earth. Rocks, under enough pressure, reach a breaking point. Think of the weakest link idea, where in weakened places, increasing rock stress causes a break. As the stress in a specific area overwhelms ... | <urn:uuid:1cefb6e2-534f-4688-bd09-6305de415ea0> | 4.375 | 763 | Knowledge Article | Science & Tech. | 56.960233 |
In mathematics, extrapolation is the process of estimating, beyond the original observation interval, the value of a variable on the basis of its relationship with another variable. It is similar to interpolation, which produces estimates between known observations, but extrapolation is subject to greater uncertainty a... | <urn:uuid:d9da97df-a549-447a-be3e-9c8ad750f2ca> | 3.890625 | 1,288 | Knowledge Article | Science & Tech. | 27.947504 |
For centuries, humanity feared comets as they flew past us from deep space, their luminous tails looming over the Earth. But more dangerous are our unseen solar-system neighbors, the dark asteroids that reside relatively nearby (traveling within a few tens of millions of miles of Earth’s orbit). The first near-Earth ob... | <urn:uuid:703a36d6-6856-4ab7-a8cb-5e8247363243> | 4.03125 | 731 | Nonfiction Writing | Science & Tech. | 42.066691 |
What makes a red thing red? I bet you have a guess. Now put it to the test when we shine a high-powered laser on a red balloon. Does it pop? Does a red object absorb red light? Does it reflect red light? Does it do something different?
See the results in this science video that will challenge your expectations of scien... | <urn:uuid:28e84ed4-4bc8-4fdf-bb28-d2830ec0b6d7> | 3.25 | 256 | Truncated | Science & Tech. | 46.996259 |
Topology routinely considers spaces of dimension higher than three and some of those are much stranger than the "nice rectangular" spaces you might ordinarily think of. You might look at a few topology books and see if you can find one that meets your needs, but topology covers lots of other things and you might have d... | <urn:uuid:08c68ea1-49eb-4521-a86e-c31631958ec9> | 2.78125 | 396 | Comment Section | Science & Tech. | 43.804548 |
Vanadium is a chemical element in the periodic table that has the symbol V and atomic number 23.
A rare, soft and ductile element, vanadium is found combined in certain minerals and is used mainly to produce certain alloys.
For more information about the topic Vanadium, read the full article at Wikipedia.org, or see th... | <urn:uuid:257d98b8-a249-4d21-8359-f8ebb341820d> | 3.484375 | 97 | Knowledge Article | Science & Tech. | 30.320228 |
belong to the insect order Homoptera which also includes aphids, scale insects, mealy bugs, leafhoppers, and many other insects. All insects in Homoptera
have piercing and sucking mouthparts and all members are plant-feeders who use their mouthparts to suck fluids from plants.
Note that many scientists and books place ... | <urn:uuid:6be63332-f4ea-4b4d-9bb9-1e1ea6ee612b> | 3.734375 | 1,428 | Knowledge Article | Science & Tech. | 38.599667 |
Will our beaches become an example of the Tragedy of the Commons?
Click on image for full size
NCAR Digital Library
The Tragedy of the Commons
The term "Tragedy of the Commons" was coined by Garrett Hardin in a 1968 article in Science magazine. The concept, however, dates back to the days of Aristotle. Briefly, it stat... | <urn:uuid:b9dff943-69f1-4fa7-baac-eabdcadfb431> | 3.1875 | 782 | Knowledge Article | Science & Tech. | 53.275745 |
Information contained on this page is provided by NewsUSA, an independent third-party content provider. WorldNow and this Station make no warranties or representations in connection therewith.
/American Chemical Society) - Chemistry plays a critical role in most of life's daily activities, but we tend to take it for gr... | <urn:uuid:ede70b58-c7c9-4cb2-b14e-3a2878515d3c> | 3.765625 | 582 | Tutorial | Science & Tech. | 53.792093 |
I just stumbled across a new blog on Geology that looks quite promising. The blog is called Antimonite. Who writes it?
The author of this blog is a Swedish student of geology at the department of Geoscience at the University of Lund. I have studied a great deal before going for geology. Basically lurking around differe... | <urn:uuid:eaf7cf45-6e82-4f29-b926-0407407a1550> | 2.71875 | 289 | Personal Blog | Science & Tech. | 39.523571 |
Why are insects so energy-efficient while flying? Is it because of their light weight and aerodynamics or due to very efficient biochemical transformations (food->energy)?
How do dragonflies manage to fly at such high speeds without their wings collapsing? Their wings are thinner than paper, but they do not even flutte... | <urn:uuid:72e198ee-01e2-4e48-b50c-cb3fb66e3c7a> | 2.890625 | 70 | Q&A Forum | Science & Tech. | 55.748211 |
The U.S. Environmental Protection Agency defines renewable energy as “fuel sources that restore themselves over a short period of time and do not diminish.”
By contrast, we mainly use fossil fuels like coal, gas, and oil, whose ancient energy stores, locked away in the earth for millions of years, we mine and deplete. ... | <urn:uuid:b689bf59-d78c-48be-ba54-34e8a818ad95> | 3.6875 | 1,643 | Knowledge Article | Science & Tech. | 32.804052 |
Last week’s arctic cyclone might be what has ice extent crashing.
A Senior scientist writes me he believes we will hit a new low extent well before the ice even bottoms out.
As August turns to September, all eyes on the arctic.
Arctic sea ice extent during the first two weeks of August continued to track below 2007 rec... | <urn:uuid:11a8f94c-09e0-4f34-b1e6-3d77d11911fd> | 2.734375 | 2,774 | Content Listing | Science & Tech. | 47.801963 |
A transaction is an atomic operation which may not be divided into smaller operations.
Three transaction phases exist: build-up, during which the database operations are requested; prepare, during which the transaction is validated; commitment, during which the operations performed in the transaction are written to dis... | <urn:uuid:58bb05b6-46ad-45c8-b87b-c708411088a9> | 3.671875 | 1,507 | Documentation | Software Dev. | 49.770584 |
What is an Urban Heat Island?
On warm summer days, the air in urban areas can be 2 to 9 degrees Fahrenheit warmer than in surrounding areas. Scientists refer to these places of elevated temperatures as Urban Heat Islands (UHI), because the areas appear to be an island of heat within cooler surroundings. A UHI can be a ... | <urn:uuid:104888e7-d3a5-4ab2-bc21-b9ada918ac46> | 4.34375 | 223 | Knowledge Article | Science & Tech. | 37.077894 |
A database of vertical root profiles for global terrestrial ecosystems was assembled from the primary literature in order to characterize the belowground structure of global vegetation types and to study relationships of belowground vegetation structure with climate, soil characteristics, and aboveground vegetation str... | <urn:uuid:5c4534f0-ee9c-4629-8687-bf4c3b2cc1ce> | 3.25 | 541 | Academic Writing | Science & Tech. | 23.873834 |
The previous document made the case that the study of sinusoidal inputs is important, and showed how phasor representations of the input and the system transfer function can be used to easily determine system output. This document will explain why the standard way of representing the transfer function is with two plots... | <urn:uuid:b74f70c9-7154-422c-91c8-3035cd6f9122> | 4.3125 | 965 | Documentation | Science & Tech. | 52.635589 |
I'm taking a precalculus class in college and our text is seriously lacking in explanation. There is this one topic which I don't understand and every time someone tries to explain it, I get don't fully grasp the logic. The concept of theta naught. Is this everything that isn't theta? Here is a word problem from the te... | <urn:uuid:3e4f5b06-54d5-4fb1-945f-dde9e028d75b> | 2.84375 | 278 | Q&A Forum | Science & Tech. | 73.041211 |
On March 14th of every year we celebrate Pi Day. Now, this is much different than Pie Day. Pie is that delicious treat that comes in a variety of types. You can get apple, pumpkin, cherry, blueberry, and so many more. Pi, without the e on the end, represents the ratio between the circumference and diameter of a circle.... | <urn:uuid:1146df88-6631-4d88-b480-9539b4f82029> | 3.671875 | 737 | Personal Blog | Science & Tech. | 70.036004 |
This article explores ths history of theories about the shape of our planet. It is the first in a series of articles looking at the significance of geometric shapes in the history of astronomy.
Can you make sense of the charts and diagrams that are created and used by sports competitors, trainers and statisticians?
Thi... | <urn:uuid:61bdad88-b7b8-41e4-bc1d-605d3a284b27> | 3.671875 | 1,559 | Content Listing | Science & Tech. | 65.58677 |
Wednesday 15 May
Australian ant (Nothomyrmecia macrops)
Australian ant fact file
- Find out more
- Print factsheet
Australian ant description
This ant of ancient lineage is described as a ‘living fossil.’ It is perhaps the most ‘primitive’ ant still alive today (3). Ants are social insects, which typically live in colo... | <urn:uuid:35de88fe-e298-4eb3-9c54-957e724e729e> | 3.578125 | 1,917 | Knowledge Article | Science & Tech. | 36.339311 |
|Insect Order Strepsiptera|
Live adult Strepsiptera infected Polistes paper wasps photographed in the wild at Illinois and Florida.
Bugs Main | Bugs Index | Spider Index | Beetle Index | Butterfly Index | Insects Home
The anterior abdomens of three female Strepsiptera in the family Stylopidae protrude from under the ab... | <urn:uuid:5974085c-97ba-47e4-ae77-9c04b392fd5b> | 2.828125 | 774 | Knowledge Article | Science & Tech. | 32.961438 |
Tim the Plumber wrote:
The basic idea of AGW is that;
1 Human activity produces CO2 (absolutley)
You need to go further than that the evidence is clear that human activity has increased the the level of CO2 in the atmosphere by 40% since the late 1700 and we are responsible for CO2 in the atmosphere continuing to rise ... | <urn:uuid:080cfe41-3682-4b69-a631-387b4af0a5d1> | 3.203125 | 768 | Comment Section | Science & Tech. | 55.180846 |
The three lower-energy phases of matter are solid, liquid, and gas. Plasmas are the most common form of matter, comprising more than 99% of the visible universe. Commonly encountered forms of plasma include the Sun and other stars (which are plasmas heated by nuclear fusion), lit fluorescent lamps, lightning, the Auror... | <urn:uuid:8c2c4371-8a77-4f67-983f-6a49ec394ea1> | 3.953125 | 311 | Knowledge Article | Science & Tech. | 35.89418 |
Biodiversity is all the different types of life – including plants, animals, fungi, and micro-organisms as well as the habitats they live in. Marine biodiversity is the variety of life found in coastal and sea environments.
Why is our marine biodiversity important?
In New Zealand, we spend a lot of time at the beach: s... | <urn:uuid:11e11dba-d866-4638-8a40-23f6fe744c52> | 3.5625 | 691 | Knowledge Article | Science & Tech. | 27.245619 |
In this program, we are going to tell you how you can
change background color of a pdf file. You can change the background color
of any chunk with the help of setBackground(Color color).
In this example, we are creating a chunk then we use setBackground(Color color) to set the background color of that chunk. Here we pa... | <urn:uuid:7d669ca6-542c-4232-9f97-12dfdc2ec16f> | 3.15625 | 263 | Documentation | Software Dev. | 66.248024 |
The idea was mooted during Indian Academy of Sciences in the year 1999 followed by discussions in the Astronautical Society of India in 2000.
Indian Space Research Organisation (ISRO), which has proved its mettle in space science, will conduct the mission.
The name Chandrayaan means (in Sanskrit) - Chandra (Moon) and Y... | <urn:uuid:5591d112-d995-41d9-b02a-198eeeba8610> | 3.46875 | 618 | Knowledge Article | Science & Tech. | 47.717768 |
Rivers constantly change and rearrange their beds on their own, depending on flow and available sediment. Bars appear to move downstream over time, with new ones forming behind them. Where people come in to the process is with dams. Dams change river flow, taking out the possibility of annual floods (when you'll get a ... | <urn:uuid:c9d67a15-b152-4679-8884-19f956982b5a> | 3.65625 | 619 | Personal Blog | Science & Tech. | 52.745732 |