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(THE EFFECT OF TEMPERATURE ON THE RATE OF A REACTION)
The purpose of this demonstration is to show the effect of temperature upon the rate of a reaction.
This demonstration is appropriate for a general or first-year college-prep course. The rate of formation of CO2 (g) from the reaction of Alka-Seltzer tablets with wat... | <urn:uuid:65cb687d-3f68-4958-83eb-af743acd72ed> | 3.984375 | 605 | Tutorial | Science & Tech. | 43.960977 |
Concept A: Absolute Zero.
The lowest possible temp is around -273degC.
It is labeled 0K on the Kelvin scale.
K = degC + 273
degC = K - 273
Gas volumes are proportional to K temps.
A temp change from 20K to 40K will double the volume.
A temp change from 20degC to 40degC does not.
(It will increase the volume by 313K / 2... | <urn:uuid:c5fb0ccc-c359-4fb7-8dc9-5cd03f849c79> | 4.375 | 907 | Tutorial | Science & Tech. | 78.602143 |
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.
2006 August 7
Explanation: Our Sun is still very active. In the year 2000, our Sun went though Solar Maximum, the time in its 11-year cycle where th... | <urn:uuid:88be11d4-de8d-492c-8475-e850f41310c1> | 3.546875 | 252 | Knowledge Article | Science & Tech. | 43.020577 |
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.
2008 June 18
Explanation: What if the atmosphere above you became one gigantic lens? This actually happens when a nearly transparent sheet of pyrami... | <urn:uuid:1309cec4-34fd-4e84-baa9-bf242be7d547> | 3.59375 | 263 | Knowledge Article | Science & Tech. | 37.503707 |
|Author||Massachusetts Institute of Technology|
|Publisher||Massachusetts Institute of Technology|
|Linking from code with a different license||Yes|
The MIT License is a free software license originating at the Massachusetts Institute of Technology (MIT). It is a permissive free software license, meaning that it permit... | <urn:uuid:af6be989-5b7c-43fa-b634-e1cc836113b9> | 2.765625 | 1,239 | Documentation | Software Dev. | 34.493986 |
The factorials and binomials have a very long history connected with their natural appearance in combinatorial problems. Such combinatorial‐type problems were known and partially solved even in ancient times. The first mathematical descriptions of binomial coefficients arising from expansions of for appeared in the wor... | <urn:uuid:6f35a29e-0a04-4332-b836-23d8ea022319> | 3.421875 | 641 | Knowledge Article | Science & Tech. | 54.183563 |
What is a Magnetar?
A magnetar is a type of neutron star with an extremely powerful magnetic field, the decay of which powers the emission of high-energy electromagnetic radiation, particularly X-rays and gamma rays.1
On March 5, 1979, several months after dropping probes into the toxic atmosphere of Venus, two Soviet ... | <urn:uuid:e02012a3-3b8a-451a-b98e-9ff50678ecad> | 4.21875 | 834 | Knowledge Article | Science & Tech. | 51.825595 |
Mathematics is an activity of investigation and exploration. Informally, both calculi and an algebras are tools which consist of sets of symbols and systems of rules (usually called axioms) for manipulating those symbols.
Calculi tend to be specified/defined/explored/used to answer questions of "calculation" or reckoni... | <urn:uuid:69ed5e70-ffb4-4903-93ea-fca8cc825aaf> | 3.296875 | 661 | Q&A Forum | Science & Tech. | 29.90691 |
Climate & Energy
Ever sinces Earth’s creation, the oceans have been absorbing vast amounts of carbon dioxide in a system that keeps our planet’s atmosphere in balance. Now, because of the burning of fossil fuels, the oceans are becoming saturated with carbon. Carbon dioxide is changing the very chemistry of the oceans,... | <urn:uuid:76187a19-35c9-409e-87e5-aeeb094e7349> | 3.34375 | 111 | Knowledge Article | Science & Tech. | 28.591089 |
Yesterday marked the 40th anniversary of Landsat, the longest-running program focused on acquiring satellite photos of Earth. The Landsat satellite snaps one completely photo of the Earth’s surface every 16 days, and the petabytes of photos collected over the years have given scientists a view into how our planet’s sur... | <urn:uuid:4ed33ab6-606a-4790-966b-5f4283a07cb9> | 3.203125 | 153 | Truncated | Science & Tech. | 27.906457 |
Over the past several decades, paleontologists—including [Jack] Horner—have found ample evidence to prove that modern birds are the descendants of dinosaurs, everything from the way they lay eggs in nests to the details of their bone anatomy. In fact, there are so many similarities that most scientists now agree that b... | <urn:uuid:c541fb16-46ad-44a7-beef-9c82d8b4b1cb> | 3.40625 | 451 | Personal Blog | Science & Tech. | 33.581091 |
As alternative biochemistries go, a fair amount of both serious science and science fiction has suggested the idea of silicon based life — life which uses silicon to form its main structures as opposed to the carbon that makes up life on Earth. After all, despite the fact that carbon-based life is the only kind of life... | <urn:uuid:ceeec9bc-e050-4254-b9cc-9fdfcfc35fac> | 3.578125 | 609 | Personal Blog | Science & Tech. | 48.451911 |
Mike Shanahan (Under the Banyan) reports on the rapid decline of seed dispersing and other animals in the world’s most botanically diverse forest. (And no, it doesn’t have anything to do with that bug-bear of northern-hemisphere conservationists, overpopulation, as he details in a comment.)
Mike at Under the Banyan Tre... | <urn:uuid:e517ce15-7c38-46f8-a11a-7545e6accfef> | 3.578125 | 490 | Personal Blog | Science & Tech. | 38.495358 |
Magnetomotive force, also known as magnetic potential, is the property of certain substances or phenomena that gives rise to magnetic field s. Magnetomotive force is analogous to electromotive force or voltage in electricity.
The standard unit of magnetomotive force is the ampere-turn (AT), represented by a steady, dir... | <urn:uuid:5a8065b4-75dc-4d4d-b171-a00570bc0171> | 3.828125 | 239 | Knowledge Article | Science & Tech. | 22.215772 |
Rufous-fronted Laughingthrush Garrulax rufifrons is restricted to the mountains of west and central Java, Indonesia. It is currently classified as Near Threatened on the basis that it approaches the thresholds for Vulnerable under criteria A2cd+3cd; B1ab(i,ii,iii,v). It has a very small range, which is not severely fra... | <urn:uuid:4ceda297-6bd3-4715-ac2e-7e54a40c08f3> | 2.984375 | 723 | Knowledge Article | Science & Tech. | 49.757169 |
All points are locations. The connections between the points have a specific weight. Not all connections are bidirectional (a dot marks a start travel point). When Calculate is pressed, all routes from the selected location are calculated. When a route is selected in the listbox, the shortest route is visually shown by... | <urn:uuid:5ee3d754-6bdc-4831-b302-4e3d4a19e24b> | 3.59375 | 756 | Documentation | Software Dev. | 56.582845 |
Glen Paul: G'day, and welcome to CSIROpod, I'm Glen Paul. The State of the Climate 2012, recently released by CSIRO and the Australian Bureau of Meteorology, details the latest observations of Australia's climate, and provides analysis of the factors that influence it.
The headline finding in the State of the Climate 2... | <urn:uuid:abe5d680-80be-47de-9169-29aa35bd0688> | 2.984375 | 2,276 | Audio Transcript | Science & Tech. | 47.858324 |
Capella, brightest star in the constellation Auriga; Bayer designation α Aurigae; 1992 position R.A. 5h16.1m, Dec. +45°59−. Capella is a yellow giant star of spectral class G8 III and is also a spectroscopic binary star with a component of spectral class F. Its apparent magnitude of 0.06 makes it the 6th-brightest star... | <urn:uuid:bc94df38-8e1f-4c17-b3f7-627f984b381d> | 3.265625 | 158 | Knowledge Article | Science & Tech. | 66.870167 |
The Universe Tonight
The directory 'Gallery/programs/universe_tonight/1008' does not exist. Check your parameters.
Submillimeter Astronomy on Mauna Kea
By Dr. Hiroko Shinnaga
(Staff Research Scientist at the Caltech Submillimeter Observatory)
Hiroko Shinnaga is a staff research scientist at the Caltech Submillimeter Ob... | <urn:uuid:6329a026-7684-4287-9f00-bb460196117b> | 3.34375 | 962 | Knowledge Article | Science & Tech. | 30.894225 |
The Environment type exposes the following members.
Terminates all processes.
Finalizes the MPI environment. Users must call this routine to shut down MPI.
|Equals||(Inherited from Object.)|
Verifies that the MPI environment has been finalized by calling Dispose().(Overrides Object..::.Finalize()()().)
|GetHashCode||(I... | <urn:uuid:c4f63843-e9f7-44c8-a21d-a438015d9695> | 2.703125 | 344 | Documentation | Software Dev. | 35.781667 |
|Sep20-05, 11:56 AM||#1|
I wanted to do some research on Atomic dust.
The process would take a metal and vaporize it by a high powered LASER in a vacuum and then allow the metal vapor to cool in the vacuum an then fall to the bottem of the chamber as Atomically fine dust particles of the metal.
Is there any research ou... | <urn:uuid:f025b8c6-0294-44fe-81bd-fd919950bfb6> | 2.75 | 604 | Comment Section | Science & Tech. | 53.468349 |
Notocypraea subcarnea (Beddome 1896)
A Brief Guide to Identification
by Randy Bridges
The original description of Notocypraea subcarnea (Beddome 1896) was followed for years by confusion and mystery. With his notes on the taxonomy of this rare species Lorenz (2005, 2007) effectively clarified the matter. Unfortunately,... | <urn:uuid:2c972a1b-a6c5-451a-8f1c-8b30375addd5> | 2.84375 | 1,107 | Nonfiction Writing | Science & Tech. | 59.008805 |
About 3,250 square kilometers of Antarctica's Larsen B ice shelf shattered and tore away from the continent's western peninsula early this year, sending thousands of icebergs adrift in a dramatic testimony to the 2.5 degrees Celsius warming that the peninsula has experienced since the 1950s. Those wayward chunks of ice... | <urn:uuid:963957d5-80af-47c0-ab9e-619599675e2d> | 3.578125 | 249 | Truncated | Science & Tech. | 30.795415 |
The weather office in charge of charged with monitoring and forecasting the potential for severe weather over the 48 continental United States is the Storm Prediction Center (SPC) located in Norman, OK. The information provided by SPC will give you critical information concerning the threat of severe weather in your lo... | <urn:uuid:d6523399-e021-4060-b51b-04296171892d> | 2.6875 | 1,136 | Knowledge Article | Science & Tech. | 45.813284 |
An example of the total emissivity curve as resulting from the present version of the Arcetri Code calculation is displayed in Fig. 1. It has been evaluated assuming cm-3 and adopting the Arnaud & Raymond 1992 (Fe ions) and Arnaud & Rothenflug 1985 (other ions) ion fractions and the Feldman 1992 element abundances. The... | <urn:uuid:430f305e-c97a-4b0c-a352-8b8e773d08a6> | 3.25 | 2,229 | Academic Writing | Science & Tech. | 24.489162 |
Your online destination for news articles on planets, cosmology, NASA, space missions, and more. You’ll also find information on how to observe upcoming visible sky events such as meteor showers, solar and lunar eclipses, key planetary appearances, comets, and asteroids.
A neutron star in a binary star system is spewin... | <urn:uuid:deb18df3-73c4-4a37-9aed-1a3950eeb768> | 3.09375 | 202 | Content Listing | Science & Tech. | 39.235781 |
From this excellent answer I learned (correct me if I am wrong) that when writing a block cipher with say key size 128 bit, one has to pad the password given (variable size) so that it becomes exactly ...
Suppose you need to authenticate yourself to a program with the password - but the program's source code is public,... | <urn:uuid:c3daad68-fb58-40ac-a37a-4f7aafbeef68> | 3.4375 | 174 | Q&A Forum | Software Dev. | 67.841 |
When the Pickler encounters an object of a type it knows nothing about -- such as an extension type -- it looks in two places for a hint of how to pickle it. One alternative is for the object to implement a __reduce__() method. If provided, at pickling time __reduce__() will be called with no arguments, and it must ret... | <urn:uuid:af4b1170-3966-455c-a127-d7564c2177f7> | 2.765625 | 715 | Documentation | Software Dev. | 36.461491 |
Scientists from The Ecosystems Center have conducted a program of long-term research at several sites in northern Alaska since 1975. The Centerís arctic research program is based at Toolik Lake, in the northern foothills of the Brooks Range (Fig. 1). The three principal components of the program are: (1) lake studies, ... | <urn:uuid:25322597-c57a-44f6-b6cc-374c6da8b51a> | 3.03125 | 441 | Academic Writing | Science & Tech. | 42.500389 |
The smallest of the rorqual whales, the minke whale is also the most abundant (2). Two species are now recognised, the northern hemisphere minke whale (the subject of this species page) and the southern hemisphere minke whale (Balaenoptera bonaerensis) (5). Minke whales are slim in shape (2), with a pointed 'dolphin-li... | <urn:uuid:1d8937d1-595d-4ec0-99e7-5850ceecc7e8> | 3 | 168 | Knowledge Article | Science & Tech. | 48.776316 |
Tuesday, May 3, 2011 - 21:30 in Earth & Climate
Rock climbers are having a negative impact on rare cliff-dwelling plants, ecologists have found. In areas popular with climbers, conservation management plans should be drawn up so that some cliffs are protected from climbers, experts urge.
- Climbers leave rare plants' g... | <urn:uuid:045bae3d-27b7-4a1b-af99-2918919a83a7> | 3.125 | 179 | Content Listing | Science & Tech. | 52.991344 |
You just pick a laser, press a button, and you may transfer your armchair (or a spaceship such as the International Space Station) from one corner of your room to another. It's handy, especially for armchair physicists.
Well, so far, they can do such things with microorganisms and similar objects, not with spaceships a... | <urn:uuid:763940b7-5ba9-4ba5-a40e-2999e3aa3ca4> | 3.109375 | 274 | Personal Blog | Science & Tech. | 34.688178 |
What is causing the variability in global mean land temperature?
Article first published online: 13 DEC 2008
Copyright 2008 by the American Geophysical Union.
Geophysical Research Letters
Volume 35, Issue 23, December 2008
How to Cite
2008), What is causing the variability in global mean land temperature? Geophys. Res.... | <urn:uuid:5c73bccb-3a74-4838-912c-f998d89d4e5c> | 2.953125 | 279 | Academic Writing | Science & Tech. | 34.560227 |
In the context of databasesand object databases, in particularreplication is the ability to duplicate an object from one database (call it "database A") into another ("database B"). The duplication is performed in such a way that both object instances can be modified, so that at a later time the duplicated object can b... | <urn:uuid:8a58d228-c8cd-483e-bfcf-ceb3c874a276> | 2.953125 | 863 | Knowledge Article | Software Dev. | 31.513934 |
FOSSIL BATS OF THE AMERICAS
late Oligocene, Arikareean NALMA
The Brooksville 2 site was discovered in 1994 in a limestone quarry about 10 km northeast of Brooksville in Hernando County in central Florida. The site consists of clays and sands filling karst solution features in marine Oligocene limestone. The fossils wer... | <urn:uuid:b052993d-f445-41ca-9c2c-29c530a617a3> | 3 | 720 | Knowledge Article | Science & Tech. | 24.936272 |
Urey’s original chart
Urey’s chart as of 2012
Other stable isotopes
Unstable but long lived
Unstable: 5He and 8Be
(Left) Isotope chart constructed by Harold C. Urey in 1931 in his search for deuterium. The labels dem-
onstrate the conception of nuclear structure at the time: The nucleus was thought to consist exclusive... | <urn:uuid:001b7fee-52bf-4317-be8e-d536421aa19d> | 3.65625 | 821 | Knowledge Article | Science & Tech. | 45.177619 |
Like a mosquito on a summer evening, a bacteriophage is either feasting or in search of its next meal. But a bacteriophage isn’t interested in human blood and isn’t flying around your backyard. Bacteriophages — aka phages — are microscopic killers of bacteria. Wherever you find bacteria, which is nearly everywhere, you... | <urn:uuid:e6624d0d-2bad-459f-85aa-2d0f2fca06d0> | 3.859375 | 2,068 | Knowledge Article | Science & Tech. | 37.354687 |
[Tutorial] Basic tutorial about class basics
View Single Post
07-23-2008, 09:57 PM
Join Date: Oct 2007
Location: Manchester, UK
Nice work m8.
These variables are called class member variables and you may set a value to them when defining them.
While this may be partly true, they are not bound to a specific name, many p... | <urn:uuid:b0b33b76-a4d9-4739-99ae-19ee3808ecb7> | 3.390625 | 413 | Comment Section | Software Dev. | 46.355769 |
This example is part of the article Add Multimedia to your Web documents, part 2.
We can decide to send a raw text file, with
text/plain, to avoid to have to cut and paste the source code of your program or html web page in a
pre and write things like that which are difficult to update:
<h4>An html head example</h4> <p... | <urn:uuid:53e0d652-0fbe-48ef-bcba-ae055b5652c6> | 3 | 445 | Documentation | Software Dev. | 80.918109 |
While the USGS frantically works to keep the public from being aware of the increase in earthquakes, there
are limits to how far the cover-up can go.
Question: As of late, I have observed that USGS and EMSC are a bit lax on their
reports of earthquakes. Sometimes not seeing anything reported for hours from the last
upd... | <urn:uuid:91e0c386-5eb1-4264-a8d7-da820fb25965> | 2.84375 | 2,684 | Comment Section | Science & Tech. | 57.757297 |
Today a new generation of scientists is discovering just how powerful the McGurk Effect really is. University of California, Los Angeles, psychologist Ladan Shams has been able to create a McGurk-like illusion by displaying a flash paired with varying numbers of corresponding beeps. If Shams delivered a flash with a pa... | <urn:uuid:981b1cb0-d3da-467d-8425-af366e1704a4> | 3.28125 | 1,189 | Nonfiction Writing | Science & Tech. | 48.654761 |
Occurs in coral-rich areas of lagoon and seaward reefs. Graze on algae, usually in groups of 20 individuals (Ref. 5503, 48637). Adults usually in small groups and sometimes schooling. Juveniles solitary and usually among corals (Ref. 48637). Its numerous, small pharyngeal teeth may have evolved in response to a shift i... | <urn:uuid:45d153c4-7d17-42d9-8a6b-70ed0c65f688> | 2.765625 | 206 | Knowledge Article | Science & Tech. | 70.11359 |
Ice caps not likely to face rapid, irreversible melting as previously thought, researcher claims – meaning polar bears could surviveThe polar bear can be saved from extinction – but only if action is taken quickly to make deep cuts to greenhouse gas emissions, a new study shows.The study, published today in journal Nat... | <urn:uuid:cf70007d-41fa-45ed-bbcb-e67523aba99b> | 3.8125 | 312 | Content Listing | Science & Tech. | 47.228333 |
New Impact on Jupiter July 21, 2009Posted by jcconwell in Asteroid, Astronomy, planets.
Tags: Asteroid, Jupiter, Solar System
Taken from the article by Nancy Atkinson at Universe Today
Amateur astronomer Anthony Wesley from Canberra, Australia captured an image of Jupiter on July 19 showing a possible new impact site. ... | <urn:uuid:c1afebd0-8bef-4e5c-8715-f398ebf4f443> | 2.96875 | 199 | Personal Blog | Science & Tech. | 44.649 |
On the face of it, an artist and a theoretical physicist might seem an unlikely pairing. But Turner Prize-winning sculptor Grenville Davey and string theorist David Berman's collaboration is producing beautiful, thought-provoking work inspired by the fundamental structure of the Universe. Julia Hawkins interviewed them... | <urn:uuid:238b970c-6583-48a9-93ae-a1d82ec1f553> | 2.828125 | 487 | Content Listing | Science & Tech. | 29.523029 |
This observation shows part of the floor of a large impact crater in Arabia Terra. This crater formed in the distant past when a large asteroid or comet struck Mars, and has been heavily modified since formation. The crater was partially filled by sediments, forming the rock outcrops and layers visible in this image.
A... | <urn:uuid:fdacf472-3579-4b24-b10b-b90483bdf19c> | 3.75 | 295 | Knowledge Article | Science & Tech. | 45.585679 |
Sea turtles have long fascinated both biologists and conservationists. All of the seven species found in the world’s oceans are listed as either endangered or threatened. Of these,five species are found in waters of the Indian subcontinent. On this part of the site you can learn about the species, distribution, biology... | <urn:uuid:c8d75eff-217a-417c-8e7e-b6cbbd3e0224> | 3.8125 | 294 | Knowledge Article | Science & Tech. | 43.922448 |
Galileo plunged into Jupiter's crushing atmosphere on Sept. 21, 2003. The spacecraft
was deliberately destroyed to protect one of its own discoveries - a possible ocean beneath the
icy crust of the moon Europa.
Galileo changed the way we look at our solar system. The spacecraft was the first to fly past
an asteroid and... | <urn:uuid:134b7519-1b09-4572-9873-c1b0ccd97b71> | 4 | 177 | Knowledge Article | Science & Tech. | 41.53 |
NASA image created by Jesse Allen, Earth Observatory, using expedited ASTER data provided the NASA/GSFC/MITI/ERSDAC/JAROS and U.S./Japan ASTER Science Team.
The Karymsky Volcano in far northeastern Russia had been erupting several times a day for about a week prior to emitting this ash plume on June 19, 2006. The Advan... | <urn:uuid:2db74493-3b24-4686-af3a-3152d48361ee> | 3.875 | 302 | Knowledge Article | Science & Tech. | 37.164324 |
Taxonomic name: Mnemiopsis leidyi (Agassiz 1865)
Synonyms: Mnemiopsis gardeni L.Agassiz 1860, Mnemiopsis mccradyi, Mayer, 1990
Common names: American comb jelly, comb jelly, comb jellyfish (English), Rippenqualle (German), sea gooseberry, sea walnut (English), Venus' girdle, warty comb jelly
Organism type: comb jelly
T... | <urn:uuid:829741a3-9393-4417-9951-0b7635def64d> | 2.796875 | 2,813 | Knowledge Article | Science & Tech. | 37.436754 |
FIRST they were just for light. Now an invisibility cloak has been designed to hide magnetic fields.
Exotic substances called metamaterials steer light around very tiny objects, rendering them invisible. Alvero Sanchez at the Autonomous University of Barcelona, Spain, and colleagues have come up with a design that uses... | <urn:uuid:9719b3cf-e27e-4574-8d4b-c4f5d55f6fbf> | 3.34375 | 215 | Truncated | Science & Tech. | 51.000112 |
XML lets you use a Document Type Definition (DTD) to describe the markup (elements and other constructs) available in any specific type of document. However, the design and construction of a DTD can be complex and non-trivial, so XML also lets you work without a DTD. DTDless operation means you can invent markup withou... | <urn:uuid:c38fde61-b663-4424-842c-7ab3f41b8c44> | 3.40625 | 896 | Documentation | Software Dev. | 43.88734 |
Description of the Geospatial Multi-Agency Coordination (GeoMAC) project, online maps of current wildland fire locations using Netscape Communicator or Microsoft Internet Explorer, and user guide on how to use mapping application.
Fact sheet describing the value of The National Map designed as a network of digital data... | <urn:uuid:752058cd-cf36-4bb2-872e-877a8d7d4da2> | 3.171875 | 225 | Content Listing | Science & Tech. | 22.035968 |
Have you ever heard of the phrase, “Once in a blue moon”? If you have, did you ever think about where that saying could have came from?
If you were outside gazing at the stars last Friday, August 31st, you would have caught a glimpse of a large full moon out in the night sky. What you probably didn’t realize was that t... | <urn:uuid:ba3193a0-70a2-456a-8500-dda9091451e0> | 3.28125 | 532 | Personal Blog | Science & Tech. | 74.578639 |
New Efforts May Harness SUN LIGHT (Oct, 1934)
New Efforts May Harness SUN LIGHT
By Robert E. Martin
SUNSHINE, our greatest source of potential power, is now largely wasted. It is highly probable, however, that a few years hence science will find a way to harness the mighty energy of the sun’s radiation. Solar engines a... | <urn:uuid:12e34ca7-dce2-453f-a54a-84ac58467fb8> | 3.625 | 3,022 | Personal Blog | Science & Tech. | 47.882448 |
Earlier this month we wrote about a study of adaptable ants that changed their leaf-gathering strategies to bypass a roadblock thrown in their way. These clever insects solve traffic jams much more easily than big-brained humans do, and now scientists want to borrow their secrets to ease our highway woes.
Ants leave a ... | <urn:uuid:502b3910-e59f-46f5-8564-a34bd650c309> | 3.140625 | 311 | Personal Blog | Science & Tech. | 53.45477 |
The Taiga is a forest biome that rings the upper latitudes of the northern hemisphere. The Taiga is dominated by black spruce and paper bark birch growing together. The sunlight is low in intensity and there are only 50-100 frost free days during the summer but the taiga is the largest and most productive forest on the... | <urn:uuid:860aca34-e7fa-4d08-a104-709bbab20397> | 3.140625 | 168 | Knowledge Article | Science & Tech. | 42.067535 |
|This article does not cite any references or sources. (February 2008)|
Ergastic substances are non-protoplasm materials found in cells. The living protoplasm of a cell is sometimes called the bioplasm and distinct from the ergastic substances of the cell. The latter are usually organic or inorganic substances that are... | <urn:uuid:4c4a3a14-05af-49c9-9fd3-8639c82b69a3> | 3.171875 | 184 | Knowledge Article | Science & Tech. | 31.6924 |
Java6 added a new utility class for reading input data from character based devices including command line. java.io.Console can be used to read input from command line, but unfortunately it doesn't work on most of IDE like Eclipse and Netbeans. As per Javadoc call to System.Console() will return attached console to JVM... | <urn:uuid:7e620c36-36d0-49df-9176-87b13b8f9823> | 3.203125 | 2,190 | Content Listing | Software Dev. | 50.349095 |
Is what you see the way it is?
Structure of the reasoning so far:
We have made a model.
We deduce consequences that can be tested by observation.
- Earth rotates counterclockwise as seen from the north.
- Earth revolves around the sun counterclockwise as seen from the north.
- Earth's axis is tilted.
Davison E. Soper, ... | <urn:uuid:9cf0a8ad-0a81-44bf-8aa7-1d84a25189bd> | 3.0625 | 120 | Academic Writing | Science & Tech. | 56.892836 |
Astronomy in the News
- Archives -
Monster Asteroid 1998 'QE2' Misses Earth by Mere 3.6M Miles on May 31
Huge Asteroid Crashes into Moon
Colossal Solar Flare, Strongest of 2013, Shoots from Sun
'Ring of Fire' Solar Eclipse on Thursday
Russian Space Junk Almost Destroys NASA Telescope
New App Measures Light Pollution Le... | <urn:uuid:8e72b7c2-bd6f-4206-8880-e7e726f303fc> | 2.734375 | 2,974 | Content Listing | Science & Tech. | 47.369486 |
Find out what it's like on other planets. Learn how far away the stars are. Try a fun, space-themed project.
Constellations can help you sort the twinkling dots scattered across the night sky. Connect the stars to see what deep-sky wonders emerge.
The Sun, an average-sized, middle-aged star, formed almost 5 billion yea... | <urn:uuid:61fad42a-18c3-4cf1-9e77-c3c81d27f4a8> | 3.765625 | 478 | Content Listing | Science & Tech. | 68.207763 |
Small "Pompeii" worm worm coming out of its tube. These worms live in the hottest water of any of the vent animals and are one of the most thermally tolerant animals on Earth. Credit: Stephen Low Productions.
June 26, 2007 A discovery that radically changed our understanding of the planet we live on celebrates its 30th... | <urn:uuid:19ab9d6d-3d3f-462d-a71d-9c848ca86178> | 3.109375 | 143 | Truncated | Science & Tech. | 35.752607 |
Fungal DNA barcoding
DNA barcoding projects at Kew include harvesting sequences from fungarium specimens to populate publicly accessible sequence databases, identification of mycorrhizal fungi on plant roots, and diversity surveys of tropical macrofungi.
DNA barcoding is a systematic way to link DNA data with reference... | <urn:uuid:1e08b02c-29fe-46d5-bde1-e5032ab114cc> | 2.75 | 1,029 | Knowledge Article | Science & Tech. | 33.919144 |
I was reading about determinants and what they actually represent. I’ve been working with solutions to the Ax = b problem where A has a determinant which is zero (i.e. it has no unique inverse). Determinants were always just a thing you did and there were magic properties about them. I suddenly realise why intuitively ... | <urn:uuid:0dff6041-6c4c-430f-b744-9bc76f52f8e4> | 3.15625 | 477 | Personal Blog | Science & Tech. | 56.609977 |
This is clear evidence in support of the theory of continental drip. Initially all land lies at the North Pole, which is therefore up, as we all know. Then the land slowly drips down, which is why all continents are pear-shaped with little driplets at the bottom (like Sri Lanka and Madagascar).
When all the land has dr... | <urn:uuid:0a631f27-7e69-431b-9fe5-229fa0785315> | 3.3125 | 125 | Truncated | Science & Tech. | 58.242236 |
Is the ozone layer comprised solely of oxygen?
No, it's regular air (80% nitrogen, 18% oxygen, 1% argon, 1% others). The
ozone present is created by the action of sunlight on the oxygen. The
wavelengths of sunlight that induce this chemistry are absorbed in the
stratosphere, so they don't reach the surface. That's why ... | <urn:uuid:2efa7ddc-62ce-42fd-babe-88055dadbd1d> | 3.96875 | 456 | Audio Transcript | Science & Tech. | 42.43939 |
And then may come some proper planet names. Exoplanets are presently referred to by their host star plus a letter (a, b, c…) depending on how many other planets are present in the system, and the stars themselves are typically just cataloged by the first syllable or two of the constellation that they appear in, with so... | <urn:uuid:8a1ce6a1-a1a1-4817-adcb-1d1a3d56b663> | 3.328125 | 174 | Listicle | Science & Tech. | 38.671172 |
Mass of fire, Speed of sight
Q: In my science class we have learned about mass, and I'm just wondering, does fire have any mass? It has stumped all the teachers I asked (even my science teacher), and I would really like to know. (Jimmy, Sioux City, Iowa)
A: Fire is a series of actions and changes that produces a result... | <urn:uuid:5a2c1c21-e57d-45ef-9c11-21211860f39b> | 3.265625 | 809 | Q&A Forum | Science & Tech. | 70.110576 |
Are humans really so tiny and insignificant that their activity makes no difference on climate? Some people say so but, if you are of this opinion, you might change your mind once you read how much human activities affect the Earth's crust. For instance, the amount of rock and soil we move every year would fill the who... | <urn:uuid:5f10d36a-5177-47fe-83c4-ce1aba4a4a18> | 3.453125 | 570 | Personal Blog | Science & Tech. | 71.380816 |
How is Technology Used
Weather dominates our lives. It controls how we work, live and play, and accounts for nearly 20 percent of the information presented in local newscasts. Many of us plan our daily activities by looking at a forecast. Will it snow? Will it be humid? What are the chances of rain for the weekend?
The... | <urn:uuid:e9c3675e-2990-437b-9081-9b6ba2bfddf7> | 3.359375 | 296 | Knowledge Article | Science & Tech. | 46.612547 |
Why doesn't Python have a "with" statement like some other languages?
Starting with Python 2.5, Python does in fact have a with statement, which is used to control execution of code in a specific context:
with manager() as ctx: ... do something with ctx ...
Here, the object returned by the call to manager will be calle... | <urn:uuid:063824f6-f790-4f21-8a00-a555bb0ef00c> | 3.515625 | 674 | Q&A Forum | Software Dev. | 55.437702 |
In a study published in Environmental Research Letters, Cohen et al. (2012) note that over the last four decades Arctic temperatures have warmed at nearly double the global rate, citing Solomon et al. (2007) and Screen and Simmonds (2010); and they state that “coupled climate models attribute much of this warming to ra... | <urn:uuid:8a7ad48a-eaea-497f-b11d-8051904f0d25> | 3.234375 | 481 | Personal Blog | Science & Tech. | 30.285211 |
A stylesheet is a set of rules for transformation of XML. The stylesheet syntax allows one to intermix a sequence of xml-micro's, xml-macro's, and top-level Scheme expressions.
The grammar for
stylesheet is given below:
stylesheet-form ::= (stylesheet body-item*) body-item ::= xml-micro-form | xml-macro-form | top-leve... | <urn:uuid:bf123924-d535-44cf-a798-e9eb83ee5407> | 3.046875 | 936 | Documentation | Software Dev. | 72.033671 |
One way to decrease your use of fossil fuels is to heat your water via solar radiation. A solar water heater runs cold water through dark, radiation absorbing tubing. Systems can be as simple as using black PVC pipe on your roof. Assume one such system absorbs at a 45% efficiency in a location where average solar-energ... | <urn:uuid:c564924a-9e60-404b-a37a-a5955505bf91> | 3.421875 | 127 | Q&A Forum | Science & Tech. | 77.938333 |
Full Lab Manual
Introduction & Goals
Chemistry & Background
In Your Write-up
In this two-week experiment you will first explore the behavior of monoprotic and polyprotic acids. In week one, you will investigate the acid-base properties of acetic acid, CH3COOH, and phosphoric acid, H3PO4. By titrating, you will examine ... | <urn:uuid:511b3232-046c-4571-8396-d4af35bf1341> | 3.765625 | 203 | Tutorial | Science & Tech. | 51.880403 |
Why do I have to catch an exception when I use System.in.read()?
System.in is an InputStream, and like any InputStream, an I/O error
may occur when you read from it. For example, the Java program may
have been run as a background process with no standard input, causing
an error during a read attempt.
InputStream.read()... | <urn:uuid:b30b3b0a-58d2-40ba-90a6-9731b980d777> | 2.90625 | 120 | Q&A Forum | Software Dev. | 67.905 |
Source apportionment and loads (riverine and direct) of nutrients to coastal waters
Assessment made on 01 May 2004
- Mar 26, 2013 - Nutrients in transitional, coastal and marine waters (CSI 021) - Assessment published Mar 2013
- Jul 05, 2011 - Nutrients in transitional, coastal and marine waters (CSI 021) - Assessment ... | <urn:uuid:224284b9-74ed-4488-895d-e3777f7c618e> | 2.6875 | 760 | Structured Data | Science & Tech. | 31.357899 |
Acids and Alkalis
The process of making a
solid come from a solution is
called precipitation. The solid itself is called a precipitate.
An insoluble salt (one
that doesn't dissolve)
can be made by reacting the appropriate soluble salt
with an acid or alkali or another salt.
For examples of precipitation, see tests for ... | <urn:uuid:a7c397d1-df1a-4c30-aae0-902d1e825a00> | 4.34375 | 294 | Knowledge Article | Science & Tech. | 40.097415 |
The W3C has started a Compound Document Formats (CDF) Working Group. The CDF Working Group grew out of a Web Applications and Compound Documents Workshop to explore issues around standardization for compound documents and specification of the behavior of some format combinations, addressing the need for an extensible a... | <urn:uuid:271691c9-0fbd-48db-bc16-b602f98abc43> | 3.234375 | 3,696 | Documentation | Software Dev. | 38.307093 |
O'Reilly Book Excerpts: JXTA in a Nutshell
Getting Started with JXTA, Part 1
In part one in this series of book excerpts from JXTA in a Nutshell, learn about setting up the JXTA Java environment as well as JXTA class files, shells, and peers.
Getting Started with JXTA
In this chapter, we'll see how to get started with ... | <urn:uuid:bb00b032-e59a-401a-839c-e9ef20eec279> | 2.84375 | 1,861 | Tutorial | Software Dev. | 62.848727 |
Joined: 03 Oct 2005
|Posted: Thu May 04, 2006 8:41 am Post subject: Artificial Compound ‘Nano-Eye’ Is Modelled on Insect Eyes
|[b]Bioengineers at Berkeley University Create an Artificial Compound ‘Nano-Eye’ That Is Modelled on the Eyes of Insects[/b]
Using the eyes of insects such as dragonflies and houseflies as model... | <urn:uuid:697656ad-a76b-4c9e-a5ce-4a36864534ae> | 2.75 | 1,347 | Comment Section | Science & Tech. | 33.593078 |
The beetles are able to recognise themselves in the dim dusk light because their metallic colouration optimises the contrast of the beetles against the forest background (Théry et al 2008).
Although the brooding behaviour of Coprophanaeus lancifer remains unclear, it is likely to be similar to that of related species t... | <urn:uuid:0fe4b3b5-058a-4650-b8b3-0df956612a6a> | 3.46875 | 258 | Knowledge Article | Science & Tech. | 38.577386 |
Photo Credit: David Cappaert, www.forestryimages.org
SCIENTIFIC NAME: Rana sylvatica
DESCRIPTION: Wood frogs are distinguished from other frogs by a dark mask through eyes that resembles that of a robber's mask. Their body can have color variations from brown to pink and adults are 1.4 to 3.25 inches in length.
DISTRIB... | <urn:uuid:254549b0-2b57-4930-bac3-f6370b6cb7bd> | 3.640625 | 560 | Knowledge Article | Science & Tech. | 55.985283 |
|Science Museum of Virginia sea stars|
Strange creatures are our sea stars; they have no blood, no brains, and if we chop them up, as long as there is a fifth left, they will grow everything back. As for the no brains thing, anyone who has seen “SpongeBob SquarePants” can attest that Patrick Star, SpongeBob’s best frie... | <urn:uuid:919dbe19-f4b0-4e65-8ec3-0ab6a14a7cea> | 2.9375 | 528 | Personal Blog | Science & Tech. | 69.150478 |
The History of Steam
like English, there is the language of steam which needs to be
learnt before we dive into the basics of understanding steam.
- Terms and Definitions
-. Unit converter
Geography of a process plant
11 Steam Table
of Temperature. The degree of hotness with no implication of
the amount of heat energy a... | <urn:uuid:8b83ce57-4823-4df9-9834-ca6521f6f0b0> | 3.890625 | 4,328 | Knowledge Article | Science & Tech. | 58.849814 |
High pressure or an ‘anticyclone’ usually brings a variety of settled, dry weather, depending on the season. During winter the weather under high pressure over the UK can be often cold and cloudy during the daytime with nights often cold enough to allow frost to form. Whilst in summer it can cause days to be warm and s... | <urn:uuid:d5b3216c-5ab0-44d9-8404-84861949715a> | 3.78125 | 830 | Knowledge Article | Science & Tech. | 46.011818 |
Visibility and Air Pollution
What is Visibility?
Particulate matter and gaseous air pollution affects visibility to some degree in every national park. Air pollution can create a white or brown haze that affects not only how far we can see but also how well we are able to see the colors, forms, and textures of a scenic... | <urn:uuid:03302d20-2b94-40a3-8850-ff08e8c29a7f> | 3.90625 | 282 | Knowledge Article | Science & Tech. | 28.768744 |
[Previous] | [Session 26] | [Next]
T.R. Spilker (JPL/Caltech)
In cooperation with NASA's Solar System Exploration Subcommittee and its working groups, JPL is studying planetary science missions proposed for launch near the end of the next decade. Results will focus resources on developing technologies that enable a set... | <urn:uuid:e087acc6-8fd7-4925-9074-6258d497211e> | 2.8125 | 385 | Academic Writing | Science & Tech. | 23.943684 |
LEO > Low Earth Orbit > Polar Sun-Synchronous
Landsat 1, 2 and 3 operated in a circular, Sun-synchronous, near-polar orbit at
an altitude of approximately 913 km (567 miles), with a nominal 9:30 a.m.
crossing of the Equator during the descending ... mode. They circled the Earth
every 103 minutes, completing 14 orbits p... | <urn:uuid:1115b508-fb95-4c4e-858b-4a8084848a4a> | 3.03125 | 577 | Knowledge Article | Science & Tech. | 61.484493 |
Geometry Problem 62. Square diagonal and Inscribed Circle.
Level: High School, College, SAT Prep.
In the figure below, ABCD is a square,
the inscribed circle O and the arc BD of center A meet at E.
Prove that CE is one half of the diagonal of the square. | <urn:uuid:e5de8136-b7ef-4464-af45-0d593a2f18d4> | 3.265625 | 66 | Tutorial | Science & Tech. | 71.9535 |
Recursion is one of the tough programming technique to master. Many programmers working on both Java and other programming language like C or C++ struggles to think recursively and figure out recursive pattern in problem statement, which makes it is one of the favorite topic of any programming interview. If you are new... | <urn:uuid:4ab8b3a8-9fae-4800-a420-e5e8b236c6e1> | 4.21875 | 773 | Tutorial | Software Dev. | 37.17752 |
Sometimes learning math might give you some fun, especially for someone who love numbers. Math also can teach you small tricks like mind-reading.
Try to think of a number between 1 and 9. Then multiply it by number 9 and add the digits of this new number together. Then subtract 4 from your answer and you will be left w... | <urn:uuid:f2a3ceb3-9ec8-4ad8-915f-4d3451ff6180> | 3.421875 | 410 | Personal Blog | Science & Tech. | 69.123784 |
Oct. 26, 2000
NASA's NEAR Shoemaker spacecraft swooped 5 kilometers above the surface of 433 Eros on Oct 26th, marking its closest-ever approach to the tumbling space rock. Scientists hope the flyby will uncover clues about extra boulders and missing craters on the near-Earth asteroid.
Sept. 1, 2000
This morning a half... | <urn:uuid:02174ca5-7069-4bc7-a9e9-5e66b165531b> | 3.453125 | 623 | Content Listing | Science & Tech. | 53.322573 |
In this chapter we’ll be taking a look at sequences and
(infinite) series. Actually, this chapter
will deal almost exclusively with series. However, we also need to understand
some of the basics of sequences in order to properly deal with series. We will therefore, spend a little time on
sequences as well.
Series is on... | <urn:uuid:4bc42b49-fd6e-401b-8999-a565f2562b41> | 4.1875 | 651 | Content Listing | Science & Tech. | 44.216974 |
Coastal & Marine Geology InfoBank
Our Mapping Systems
The USGS and Science Education
USGS Fact Sheets
ground penetrating radar
Comment: 04:14 - 05:19 (01:05)
Source: Annenberg/CPB Resources - Earth Revealed - 21. Groundwater
Keywords: "Earth's surface", sandstone, sediment, soil, water, groundwater, "pore space", poros... | <urn:uuid:0fb9370b-38a6-4e5b-98cb-bc09350a7a6a> | 3.90625 | 269 | Knowledge Article | Science & Tech. | 41.551688 |
Main page Blog Astronomy news Astronomy facts Astronomy sites
A Galactic Collision in Action
This new image shows the results of a vast collision between two galaxies. This strange object is known as NGC 7252, or Arp 226, and has the odd nickname Atoms-for-Peace. The picture was taken by the Wide Field Imager on the MP... | <urn:uuid:8f2e2a81-9371-425c-b36a-a5639d7071ee> | 3.6875 | 561 | Personal Blog | Science & Tech. | 46.412413 |
Deriving the Ramsey Numbers
School: ALBUQUERQUE ACADEMY
Area of Science: Mathematics -- Graph Theory
Ramsey numbers are part of a field of mathematics called graph theory. km (where m is any positive integer) is defined as a graph that contains m points, also known as nodes, with all possible line segments in between e... | <urn:uuid:e6943b18-6ad5-466b-90b6-1ce4b1a4882a> | 4.21875 | 382 | Academic Writing | Science & Tech. | 55.267635 |
What does it mean? Part 2
Dr. Bob and I are taking turns explaining the implications of the recent Nature paper. In the first post, Dr. Bob discussed two very important questions: "How big?" and How massive?" In this post, I'm going to cover another big-picture topic: the orientation of the disk.
I'll start with what w... | <urn:uuid:9bee31ba-4e71-42a5-b005-beeb3ed88932> | 2.796875 | 560 | Personal Blog | Science & Tech. | 67.513261 |
Assembly and testing of NASA's Mars Science Laboratory spacecraft is far enough along that the mission's rover, Curiosity, looks very much as it will when it is investigating Mars.
[b]Above[/b]: [i]This image was taken April 4, 2011, inside the Spacecraft Assembly Facility at NASA's Jet Propulsion Laboratory, Pasadena,... | <urn:uuid:5ca854f0-7d47-416f-94a8-dd64610aa1b3> | 3 | 232 | Comment Section | Science & Tech. | 41.949886 |