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A method of measuring refractive indices of gases by observations of Rayleigh scattered light is described. The method depends on the fact that the intensity of such scattered light is proportional to the square of the refractivity of the gas. Results are presented for several gases at a wavelength of 1216 Å. The value... | <urn:uuid:0d6bc395-8022-4e5b-9264-d0baf393838e> | 3 | 166 | Academic Writing | Science & Tech. | 62.256462 |
If you are a follower of TV crime shows, it is likely that you’ve come across one of the CSI offshoots (CSI stands for Crime Scene Investigation) and a slightly less well known show called ‘Cold Case‘. In both these shows, difficult crimes (usually murders) are solved using the most up-to-date forensic methods and incr... | <urn:uuid:b4a84f90-a6e0-4b07-88ba-609e25137bcc> | 2.890625 | 1,290 | Personal Blog | Science & Tech. | 43.982561 |
Viruses are, by far, the smallest organisms in the world. Viruses are stripped down to an absolutely minimal design: a protein capsule containing DNA or RNA . A number of viruses contain their genetic information in RNA instead of DNA). Viruses survive and reproduce by infecting a cell and commandeering the cellular sy... | <urn:uuid:3018f554-8b9e-4b48-89ab-7b702dfe27f6> | 3.890625 | 232 | Knowledge Article | Science & Tech. | 37.678071 |
Several groups have loudly declared their intentions in the past couple of years to attempt human cloning, but the announcement by Advanced Cell Technology in Worcester, Mass., that it had succeeded (as reported in Scientific American and elsewhere) still seemed to catch many people off guard. Some of that surprise had... | <urn:uuid:755aa2cb-616f-48ec-adac-320903ab7a50> | 2.84375 | 249 | Truncated | Science & Tech. | 47.013123 |
For their research, Katija and Dabiri trained their sites not on krill but on small jellyfish, which can also swarm in large schools. They tracked how individual jellyfish carried water as they swam upward in the water column by observing the track of glowing dye injected into the water [see video below] as well as by ... | <urn:uuid:3542a611-0323-4bb9-8728-29fad3c1ae3f> | 4.15625 | 555 | Knowledge Article | Science & Tech. | 40.798333 |
Published: Tuesday, January 29, 2013 Last Updated: Tuesday, January 29, 2013
An international team of scientists has sequenced the genome of the chickpea, a critically important crop in many parts of the world, especially for small-farm operators in marginal environments of Asia and sub-Saharan Africa
Full access to th... | <urn:uuid:b668e717-eae6-4d63-9876-8039e57d5d94> | 3.265625 | 106 | Truncated | Science & Tech. | 37.47 |
In quantum eraser experiments, getting information about one entangled photon decides if the second photon behaves classically or quantum (interfere). Optical lengths for these photons chooses time order of these events, so we can delay the "decision" to happen after what it decides about. But in "standard version" of ... | <urn:uuid:094f2564-a56b-4043-a9b8-2674d61d82f5> | 2.90625 | 549 | Comment Section | Science & Tech. | 47.706279 |
Sometimes, mineral compositions that are stable at high temperature become unstable when temperature decreases. They may exsolve ("unmix") so that a grain that was once uniform contains blebs, patches or stringers of two minerals. Exsolution is generally only visible in XP views.
Exsolution in Feldspar and Pyroxene
The... | <urn:uuid:ceace9ec-7609-447c-a4a4-5ad371221e6f> | 3.40625 | 308 | Knowledge Article | Science & Tech. | 43.924649 |
Forbes and Mississippi Governor Haley Barbour say we shouldn't really worry much about the Deepwater Horizon oil spill—after all, natural oil seeps are constantly leaking hundreds of thousands of barrels of oil into the Gulf of Mexico and everything is fine. So, are they right?
As you might guess, there's a bit of dist... | <urn:uuid:1f65d497-b969-4e80-b372-15f4930ccd86> | 3 | 562 | Personal Blog | Science & Tech. | 59.218612 |
Alligators are cold-blooded. They cannot generate their own heat.
Instead, they take on the temperature of their environment.
Notice in the infrared images, how the alligator is cool compared to the
warm-blooded human holding it. The alligator's temperature is close to
room temperature. Notice also how cold the alligat... | <urn:uuid:2f4fc5d3-c238-48dc-b921-ccc4748fa295> | 3.421875 | 103 | Knowledge Article | Science & Tech. | 42.594231 |
Research @ KICP
Projects Archive: CAPMAP
Cosmic Background Radiations
CAPMAP is an attempt to measure the polarization anisotropy of the cosmic microwave background (CMB) using the 7m Crawford Hill Telescope in New Jersey, along with intensive instrumentation additions.
The Cosmic Microwave Background (CMB), as the rel... | <urn:uuid:7ffd5220-c510-4f0a-a739-3069dfa72e20> | 2.78125 | 575 | Knowledge Article | Science & Tech. | 21.653775 |
The question is:
Given the triangle ABC with AB=5 and BC= 5sqrt3/3
The measure of the angle A is 30 degrees. How many choices are there for the measure of angle C?
I've hit a problem with the final solution.
multiply both sides by 5
since Im dealing with sin, I reference the unit circle and see that sin is sqrt3/2 at p... | <urn:uuid:c0d7df4a-ed4f-4a2f-b0ab-19d06d91d8fa> | 3.140625 | 107 | Q&A Forum | Science & Tech. | 86.96 |
Beaches turning to mud and changes in wildlife are among the signs of a warming climate recorded by an Inuit community in Canada.
By Alex Kirby
BBC News Online environment correspondent
They say increasingly unpredictable weather is significantly altering the way they live.
They are having to get used to unfamiliar bir... | <urn:uuid:789bf757-27b9-41d5-a0c0-273fc07a8c25> | 3.15625 | 805 | Truncated | Science & Tech. | 64.530119 |
Consider a watch face which has identical hands and identical marks
for the hours. It is opposite to a mirror. When is the time as read
direct and in the mirror exactly the same between 6 and 7?
The ten arcs forming the edges of the "holly leaf" are all arcs of
circles of radius 1 cm. Find the length of the perimeter o... | <urn:uuid:0095e3f8-5ddd-49aa-8278-8e1214731ae2> | 3.046875 | 117 | Q&A Forum | Science & Tech. | 70.805 |
Hugh Pickens writes "The LA Times reports that scientists analyzing infrared light reflected by 24 Themis, one of the largest asteroids in the solar system, have discovered evidence of water ice as well as organic compounds — findings that bolster a leading theory for the origins of life on Earth that the essential bui... | <urn:uuid:1c693633-5418-4dd0-b8f7-452153f851c5> | 3 | 198 | Truncated | Science & Tech. | 27.914412 |
There’s a large element of “chance” in all biological systems. Whether it’s a biochemical process within a cell, the movement of cells throughout an organism, or the evolution of the those organisms, stochasticity plays a large a part in biology. Unfortunately, this is often missed by most students of biology — either ... | <urn:uuid:7edbb426-90a3-4735-97e1-2cc5895bb891> | 3.125 | 215 | Personal Blog | Science & Tech. | 44.764301 |
Time dilation is a physics concept related to relativity and special relativity.
[change] Types of time dilation
In Albert Einstein's theories of relativity, there are two types of time dilation. In special relativity, clocks that are moving with respect to (according to) a stationary observer's clock run slower. For e... | <urn:uuid:7517089b-ad13-4e1a-bb42-74f902a8f9a5> | 3.953125 | 470 | Knowledge Article | Science & Tech. | 47.824464 |
|Theta/gamma nested oscillations form a neural code: |
An item is represented in working memory by firing within a gamma cycle; different items are represented in their order at different discrete phasises of a theta cycle.
- Storage of 7 +/- 2 short-term memories in oscillatory subcycles. Lisman JE, Idiart MA. Science... | <urn:uuid:602976da-346a-47e9-aed6-96627c801d0f> | 2.703125 | 297 | Content Listing | Science & Tech. | 66.829322 |
points in space
root at power7200.ping.be
Fri Jan 17 03:08:29 EST 1997
In article <c07craig-ya023180001001971216460001 at news.csus.edu>,
c07craig at sfsu.edu (c weiser) writes:
>Suppose we know vector PQ which is in a plane in space. We also know angle
>theta, which is the angle between PQ and PR. PR is also in the sa... | <urn:uuid:85684b4c-9f29-42e2-be49-9d9c6cf7fdfc> | 2.84375 | 633 | Comment Section | Science & Tech. | 89.469337 |
This new metereological theory is as revolutionary as Galileo's assertion was to the Pope that the earth revolved around the sun, and not the other way round... and it has huge implications for climate change in the fight to save the planets forests.
"First published in 2007 by two Russian physicists, Victor Gorshkov a... | <urn:uuid:31c137ea-e2e0-4931-aafd-0387cd51b557> | 3.203125 | 509 | Personal Blog | Science & Tech. | 31.285694 |
[void] is an an object which represents "not present" or "non-existant". This is used primarily for method return values. For example, [map->find] will return [void] when the object being searched for is not contained within the map. [void] is the default return value for a method which does not explicitly return anyth... | <urn:uuid:922b2609-7928-4d56-bd35-9b71ea170acd> | 2.890625 | 263 | Documentation | Software Dev. | 56.383333 |
Wheels are a pretty effective method of getting around. Is there any reason why they never evolved in nature?
• It is not true to say that nature hasn't invented the wheel: bacteria have been using it to get around for millions of years. It is the basis of the bacterial flagellum, which looks a bit like a corkscrew and... | <urn:uuid:9991a861-ddcf-40d9-8046-2df85374df6e> | 3.875 | 207 | Truncated | Science & Tech. | 48.746629 |
Dr. Ingo A. Pecher
Examination of marine seismic reflection data for the occurrence and distribution of gas hydrates on the continental margins of New Zealand
Brief summary of research topic
Gas hydrate, an ice-like compound of water and gas molecules, trapped in marine sediments stores immense amounts of methane, whic... | <urn:uuid:50291901-1ec6-4090-9ca0-d0df21fe218e> | 3.5 | 801 | Academic Writing | Science & Tech. | 28.85 |
File Clam (Limaria sp.) These delicate bivalve molluscs live on the underside of rocks, or under shell rubble in rock pools in the intertidal zone. They usually have a cream or whitish shell and red or pale orange tentacles. They swim actively by beating their tentacles while rhythmically opening and closing both shell... | <urn:uuid:1f05adfd-fbf4-4a6e-8142-13ef3333611a> | 3.5 | 158 | Knowledge Article | Science & Tech. | 45.296408 |
May 6, 2002 - Defining Constant Objects and Arrays
May 6, 2002|
Defining Constant Objects and Arrays
Tips: May 2002
Yehuda Shiran, Ph.D.
Array, only the reference to the data remains constant. The content of the
Arraycan be changed. It allows you to keep the address of an object or an array fixed, and it also keeps you... | <urn:uuid:12d015d2-463b-4035-94da-ffa7157400df> | 2.859375 | 215 | Tutorial | Software Dev. | 56.601581 |
To warm up, here are a few pictures I found at the KING-5 weather site (taken today by donmonroe) near the Skagit Valley.
Here is a great video of the convection developing yesterday: click here.
Such active convection was not isolated in western Washington, but extended over and east of the Cascades. You can see the s... | <urn:uuid:17872ba0-31b3-45f7-8c0a-e56995e542da> | 2.921875 | 438 | Personal Blog | Science & Tech. | 58.091127 |
Jacob, U et al. (2011): (Table A1) Species list of the high Antarctic Weddell Sea food web. doi:10.1594/PANGAEA.788061, Supplement to:Jacob, Ute; Thierry, Aaron; Brose, Ulrich; Arntz, Wolf E; Berg, Sofia; Brey, Thomas; Fetzer, Ingo; Jonsson, Tomas; Mintenbeck, Katja; Möllmann, Christian; Petchey, Owen L; Riede, Jens O;... | <urn:uuid:5c2f682c-d03c-426a-83f8-597b6442887e> | 2.9375 | 648 | Academic Writing | Science & Tech. | 33.960707 |
The term, yield, carries the same meaning in chemistry as it does in any field where an amount is produced. Farmers look at yield of a crop per acre. Bankers look at the yield (interest earned) on savings, investments, etc. Chemists look at the yield of a chemical reaction. Yield consistently means the amount produced ... | <urn:uuid:1c41494e-0f90-48c5-b863-61a52b3afaa1> | 4.4375 | 1,413 | Nonfiction Writing | Science & Tech. | 70.914703 |
|This article does not cite any references or sources. (December 2007)|
In geology the term compression refers to a set of stresses directed toward the center of a rock mass. Compressive strength refers to the maximum compressive stress that can be applied to a material before failure occurs. When the maximum compressi... | <urn:uuid:ff2a371f-3df1-4dad-a752-c36950385be9> | 4.25 | 188 | Knowledge Article | Science & Tech. | 32.752027 |
ArmonSore wrote:I take the same stance here. It's not wrong to say that a feather is accelerating, but it's not right either. It's unprovable(which sounds to me to be a very godelian statement). So we needn't say that the feather is accelerating at all. For example, if we're in a spaceship that is accelerating upwards ... | <urn:uuid:12f3e665-f8a1-4180-a75a-7bc5f93cd145> | 2.71875 | 306 | Comment Section | Science & Tech. | 63.408483 |
Taxonomic name: Castor canadensis (Kuhl 1820)
Common names: American beaver (English), beaver (English), Canadian beaver, castor (French), castor americano (Spanish), North American beaver (English)
Organism type: mammal
Castor canadensis (beaver) is native to North America, and has been introduced to Tierra del Fuego ... | <urn:uuid:5cc247e8-7c58-4f81-8871-a6b83c43f0b3> | 3.65625 | 1,914 | Knowledge Article | Science & Tech. | 35.239909 |
|How Big Cities' Bad Air Pollutes the Sierras|
early every afternoon, winds from the ocean blow pollution through three major
passes in the coastal ranges -- the Carquinez Strait, Altamount Pass, and
Pacheco Pass -- into the Central Valley and up against the Sierra. The streams
of air carrying Bay Area emissions mix wi... | <urn:uuid:ce84793e-fe2d-4d00-b070-fdc4b15b2456> | 3.203125 | 290 | Knowledge Article | Science & Tech. | 51.374206 |
To investigate the relationship between the distance the ruler drops and the time taken, we need to do some mathematical modelling...
Two trains set off at the same time from each end of a single
straight railway line. A very fast bee starts off in front of the
first train and flies continuously back and forth between ... | <urn:uuid:296cc7e2-18da-402d-b2cf-ae071b23a1a1> | 3.75 | 932 | Content Listing | Science & Tech. | 60.449012 |
People have been using gold particles dispersed in water — gold hydrosols — for medical purposes for over 1000 years. Recently, hydrosols containing gold nanoparticles have become particularly popular because they have exciting potential in cancer therapies, pregnancy tests and blood sugar monitoring.
What have muesli,... | <urn:uuid:68f468c6-b661-480e-88df-7c9a3375d834> | 3.390625 | 320 | Content Listing | Science & Tech. | 37.820882 |
Mathematicians Confirm Life on Mars
A new study uses mathematical techniques to examine the Viking data. The study examines the raw data for signs of complexity, an indicator of life forms. Chemical processes are not complex; life forms are. The study appears to indicate that the labelled release results were produced ... | <urn:uuid:7941e535-8516-477b-9d94-73e971ecb79e> | 2.78125 | 226 | Personal Blog | Science & Tech. | 35.52494 |
Botany online 1996-2004. No further update, only historical document of botanical science!
Cellulose is composed of linear chains of covalently linked glucose residues. It is very stable chemically and extremely insoluble. In the primary cell wall consists one glucose polymer of roughly 6000 glucose units, in the secon... | <urn:uuid:4cac7380-7b4b-40d6-a506-c9fa4f8543a9> | 3.015625 | 616 | Knowledge Article | Science & Tech. | 30.147371 |
Ahh…There is nothing like a Christmas tree design created with bacteria and other microorganisms in a petri dish. If I was a scientist stuck in a lab all day long, and if I needed some holiday cheer, I would definitely try to hook up some petri dishes with festive fungi too. Let me ask you this, when you think of fungu... | <urn:uuid:c17330b7-3afc-4ea0-8c98-3dfcda8e7c6e> | 2.78125 | 421 | Personal Blog | Science & Tech. | 64.752941 |
solenoidArticle Free Pass
solenoid, a uniformly wound coil of wire in the form of a cylinder having a length much greater than its diameter. Passage of direct electric current through the wire creates a magnetic field that draws a core or plunger, usually of iron, into the solenoid; the motion of the plunger often is u... | <urn:uuid:0b94e974-7ca1-4bdf-9bb4-1d0071dd6ed7> | 3.28125 | 103 | Knowledge Article | Science & Tech. | 50.977998 |
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.
...in fact appears to be in a somewhat lower density region than the immediate surroundings, where early B stars are relatively scarce. There is a... | <urn:uuid:2a6ff110-e432-4346-9dd3-7cbdee649a18> | 3.09375 | 139 | Knowledge Article | Science & Tech. | 49.13617 |
Common Lisp the Language, 2nd Edition
Every character has three attributes: code, bits, and font. The code attribute is intended to distinguish among the printed glyphs and formatting functions for characters. The bits attribute allows extra flags to be associated with a character. The font attribute permits a specific... | <urn:uuid:d6db6df3-914e-4f64-bf0e-6cb6adefaeb6> | 3.40625 | 856 | Documentation | Software Dev. | 31.528643 |
object passing: The ability to pass a copy of an object from one G2 process to another via an external interface. Object passing is accomplished through the use of a remote procedure declaration to specify which attributes of the object to send.
Off-line license: A fundamental G2 license type providing G2 for a stand-a... | <urn:uuid:3fc79670-e841-43c9-8314-1532af952011> | 2.859375 | 385 | Documentation | Software Dev. | 24.659212 |
Posted by Alison on Sunday, February 19, 2012 at 11:21pm.
You don't unless it's moles of a solvent.
You could have 5 moles water and calculate the volume that would occupy if you knew the density.
5 mols H2O x (18 gH2O/1 mol H2O) = grams H2O, then
mass H2O = volume H2O x density H2O
My teacher told me something about 2... | <urn:uuid:ba5f7557-c1b0-4b0b-98b9-a730aa81c508> | 3.015625 | 631 | Comment Section | Science & Tech. | 97.421795 |
Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °
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The sum of the lengths of any two sides is greater than the lenght of the third side.
here is a proof for right angled triangle:
Ooohh ... so yo... | <urn:uuid:b87c9508-8ba8-4999-8bb1-9a30ace9f249> | 3.046875 | 285 | Comment Section | Science & Tech. | 87.598507 |
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:720d1438-f6f2-4c62-b93e-5bc01fc406fd> | 2.703125 | 134 | Structured Data | Science & Tech. | 50.631579 |
Emissions from fires to the atmosphere IIThe amount of dioxins, PAH (polycyclic aromatic hydrocarbons) and VOC (volatile organic compounds) emitted from fires to the atmosphere per year has been estimated. The estimate is based on the number of fires in buildings, vehicles, waste and forest fires in Sweden in 1999. It ... | <urn:uuid:0f51ebf9-9462-4693-b32b-7e880ac3eaa0> | 3.140625 | 439 | Knowledge Article | Science & Tech. | 42.245 |
A full hemispherical tank of radius
drains under the influence of gravity from a circular hole of radius
at the bottom of the tank. The velocity of fluid flowing from the hole is
(Torricelli's law), where
is the gravitational acceleration and
is the height of water at time
, which is shown in the tank and plotted below... | <urn:uuid:afd1d85e-96ea-49d9-ae95-ad62f51065b7> | 2.828125 | 74 | Tutorial | Science & Tech. | 41.748276 |
|Jmol-3D images||Image 1|
|Molar mass||207.32 g/mol|
| (what is: / ?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Lewisite is an organoarsenic compound, specifically an arsine. It was once manufactured in the U.S. and Japan for use as a chemical weapon, acting ... | <urn:uuid:dd794f1b-156a-4e82-be25-0c5b48b81481> | 3.140625 | 1,721 | Knowledge Article | Science & Tech. | 48.187877 |
I am trying to prove this and found the proof, but have no idea how we are able to multiply by (B-1A-1) in the first step when it is not in the original statement. I understand it, but not where this comes from. Also, on the second side, where does the AB come from?
Question: Prove: (AB)-1 = B-1A-1.
Solution: Using the... | <urn:uuid:038386b6-77ff-48d5-bdb0-a6b48f1084e1> | 3.328125 | 179 | Q&A Forum | Science & Tech. | 80.605608 |
An atoll not at all what I expected
The Center for Coastal Monitoring and Assessment (CCMA) within the National Centers for Coastal Ocean Science (NCCOS) at NOAA is among those responsible for creating maps of coral reefs. Maps are a critical part of nearly every aspect of coral reef protection. In 2009, NOAA’s Coral R... | <urn:uuid:2c04b4d4-c740-4ec2-9052-6b4c04638671> | 3.125 | 1,053 | Personal Blog | Science & Tech. | 38.623585 |
|The recording device that captured the sounds of black smoker venting sits here between waters that are 660 F.
Credit: University of Washington
So you're a fish.
Right now some tubeworm tartare and clams on the half shell would really hit the spot, so you're headed for the all-night café. "All-night" being the operati... | <urn:uuid:2a630cd5-481f-4a79-8770-a3d0044a0559> | 3.015625 | 1,417 | Knowledge Article | Science & Tech. | 54.772941 |
Animal Species:Striped Pygmygoby, Eviota sebreei (Jordan & Seale, 1906)
The Striped Pygmygoby can be recognised by its colour pattern. The species occurs throughout much of the Indo-Pacific.
Sebree's Pygmy Goby
The Striped Pygmygoby is translucent with a stripe laterally from the snout to the caudal peduncle There are ... | <urn:uuid:b5c38c41-811c-4fec-8d92-54bf06cb6f16> | 3.296875 | 321 | Knowledge Article | Science & Tech. | 61.369152 |
In 2012, DOE granted Washington’s team and their project, the Climate End Station, a total of 86 million processor hours through the Innovative and Novel Computational Impact on Theory and Experiment program. The team has 56 million processor hours on Jaguar and 30 million processor hours on Argonne National Laboratory... | <urn:uuid:4a5e04ff-e9de-43e5-922b-d4f0bb868c94> | 2.96875 | 808 | Comment Section | Science & Tech. | 47.687313 |
Recovery of Vegetation
Table 5 shows a list of the species that survived the eruption in the "Devastation Area." No plant survived on the Kilauea crater floor (habitat 1) or the cinder cone (habitat 2).
In the spatter-with-tree-snags habitat (3), four species survived. Several of the Metrosideros tree snags, initially ... | <urn:uuid:23c68f38-ee7b-4ce2-8dd6-4730e868583c> | 3.890625 | 1,618 | Academic Writing | Science & Tech. | 42.79402 |
A weather satellite is a type of satellite that is primarily used to monitor the weather and climate of the Earth. These meteorological satellites, however, see more than clouds and cloud systems. City lights, fires, effects of pollution, auroras, sand and dust storms, snow cover, ice mapping, boundaries of ocean curre... | <urn:uuid:717eb29a-17bc-4182-ba4c-e0196c4ac766> | 3.9375 | 194 | Knowledge Article | Science & Tech. | 30.306 |
But "inertial observers" doesn't necessarily imply the Lorentz transformation unless you assume both
postulates of SR. Inertial observers as defined in Newtonian physics all observe the same laws of physics (first postulate satisfied), and all see each other traveling at constant velocity, but there's no invariant spee... | <urn:uuid:2ec2947b-9d51-439f-baec-a270c7f70e5e> | 2.78125 | 557 | Comment Section | Science & Tech. | 23.765582 |
… if your data do not look like a quadratic!
This is a post about global sea-level rise, but I put that message up front so that you’ve got it even if you don’t read any further.
Fitting a quadratic to test for change in the rate of sea-level rise is a fool’s errand.
I’d like to explain why, with the help of a simple e... | <urn:uuid:024e0866-0c7e-4869-8916-a2a814f3e376> | 2.984375 | 2,500 | Comment Section | Science & Tech. | 69.154862 |
Uranus is the seventh planet from the Sun, named after the ancient Greek deity of the sky, the father of Kronos (Saturn) and grandfather of Zeus (Jupiter). Uranus was the first planet discovered in modern times by Sir William Herschel on 13 March 1781.
Uranus and Neptune have different internal and atmospheric composit... | <urn:uuid:39d60a4d-541a-470d-bde6-80e6d7b04f34> | 3.75 | 349 | Knowledge Article | Science & Tech. | 35.78657 |
Scientists with the National Oceanic and Atmospheric Administration announced recently that the carbon dioxide levels in Earth’s atmosphere measured just shy of 400 parts per million. Evidence from ice core samples and other means strongly suggests that level is the highest that carbon levels have ever been since human... | <urn:uuid:edb0863a-6446-49ed-90e6-d669ef9cea36> | 3.125 | 106 | Truncated | Science & Tech. | 44.3825 |
Unlike the Hubble Space Telescope, the Cosmic Origins Spectrograph (COS) isn’t designed to capture visual images. Instead, COS is designed to perform spectroscopy, which is the study of the interaction of matter and electromagnetic (EM) radiation. Each object leaves a unique signature on any light that it emits, absorb... | <urn:uuid:d47aa99d-a636-4707-b836-ff85c7e350ff> | 4.15625 | 1,372 | Knowledge Article | Science & Tech. | 35.453579 |
Good Morning, lets take a look at the phenomenon of Radar Blooms this morning for the Saturday Lecture Series:
There are a lot of interesting anomalies that you may see on displays that show NEXRAD (or any kind of) weather radar data. Some are caused by software, some are caused by the radar misinterpreting what it see... | <urn:uuid:1295c634-192b-4562-b6a6-8073866fa7f6> | 2.796875 | 1,507 | Comment Section | Science & Tech. | 52.536376 |
The Guardian has an exciting-looking article, entitled “New to Nature”, which is about a centipede, Scolopendropsis duplicata, which has been discovered in Tocantins State, central Brazil. This discovery is described in this open access article from the journal Zootaxa by Chagas Jr, Edgecome and Minelli. (Incidentally,... | <urn:uuid:551d0b26-6e90-4c32-9ec3-43828826e7fe> | 3.203125 | 1,518 | Personal Blog | Science & Tech. | 37.244886 |
In the late 1950s, the primary means of international communication was by undersea cable or by bouncing radio waves off the ionosphere. The US was concerned that in the event of a major conflict, the cables could be cut. This would force all communications through the less reliable radio connection through the ionosph... | <urn:uuid:412edebe-f29e-45b1-a219-809e73211f1a> | 3.59375 | 724 | Knowledge Article | Science & Tech. | 37.92351 |
Some versions of the Python interpreter support editing of the current input line and history substitution, similar to facilities found in the Korn shell and the GNU Bash shell. This is implemented using the GNU Readline library, which supports Emacs-style and vi-style editing. This library has its own documentation wh... | <urn:uuid:46fa8fc5-ca42-4339-afe9-d57ef0b648fd> | 3.09375 | 1,098 | Documentation | Software Dev. | 42.480278 |
The new sets module contains an implementation of a set datatype. The Set class is for mutable sets, sets that can have members added and removed. The ImmutableSet class is for sets that can't be modified, and instances of ImmutableSet can therefore be used as dictionary keys. Sets are built on top of dictionaries, so ... | <urn:uuid:65b0f9dc-a525-495d-b3e2-e9d01fa5ed9b> | 3.171875 | 592 | Documentation | Software Dev. | 84.421748 |
|< Day Day Up >|
8.8. Dealing with Deviations and Errors
As discussed in Chapter 3, any system has to deal with deviations and errors. Deviations are those conditions that can be expected to occur in normal processing. Errors are those conditions resulting from hardware or software malfunctions.
8.8.1. Signaling Errors... | <urn:uuid:f9519b1e-bdf3-4b9b-a432-e068be4e5f59> | 3.046875 | 689 | Documentation | Software Dev. | 44.159875 |
|Tapping the Sun's life-sustaining energy is more than using the light and heat that we see and feel. It is conversion from solar energy to electricity that powers our homes, cars, and the computer that enables you to observe this web site. The area of solar energy is so broad that to cover all of the information that ... | <urn:uuid:c325006e-c854-40df-ae91-ee4179443529> | 3.703125 | 583 | Knowledge Article | Science & Tech. | 32.380814 |
Distribution of Meteor Hits
Name: David E.
Is there a map that charts over the history of the earth
where meteors have hit?
Yes there certainly is. It appears every year in the Royal
Astronomical Society of Canada's Observer's Handbook. You can get
one from the Royal Astronomical Society of Canada (see www.rasc.ca),
an... | <urn:uuid:90bf3a96-7e64-4632-9877-5fb7fc78603f> | 2.921875 | 233 | Q&A Forum | Science & Tech. | 61.914845 |
This illustration shows how an Atomic Force Microscope (AFM) is used to image a line of graphene made by a pencil. The scale spans ten orders of magnitude, from the microscope and pencil to the atoms that compose the scanning probe and pencil line. As the viewer zooms into the line, graphite flakes, and eventually a si... | <urn:uuid:b3899c97-18db-4bef-a31d-e47d1bf9e5b0> | 3.4375 | 183 | Truncated | Science & Tech. | 30.356176 |
A means of color evaluation utilizing the temperature (in degrees Kelvin) to which a black object would need to be heated in order to produce light of a certain wavelength (or color). Substances, when heated, will tend to incandesce—or, in other words, as their constituent atoms or molecules absorb increasing amounts o... | <urn:uuid:0d9cd695-c970-47b5-8953-cdaf148c5808> | 3.828125 | 318 | Knowledge Article | Science & Tech. | 37.823239 |
One of the best-known bits of folk wisdom about invasive species is that they settle down after a while to become part of a rebalanced ecosystem, and stop being a problem. This is an appealing idea, but how often is it true?
It turns out that scientists don't have very good answers to questions such as: Do the effects ... | <urn:uuid:5a333e1d-7ded-47d5-90b8-399a1d67ded7> | 3.734375 | 878 | Nonfiction Writing | Science & Tech. | 52.355121 |
Common Lisp the Language, 2nd Edition
The most primitive form for function invocation in Lisp of course has no name; any list that has no other interpretation as a macro call or special form is taken to be a function call. Other constructs are provided for less common but nevertheless frequently useful situations.
appl... | <urn:uuid:cdacc826-d3ac-4ab5-a188-659b6dcc68fa> | 3.078125 | 789 | Documentation | Software Dev. | 60.968464 |
The term electromagnetic induction refers to the generation of an electric current by passing a metal wire through a magnetic field. The discovery of electromagnetic induction in 1831 was preceded a decade earlier by a related discovery by Danish physicist Hans Christian Oersted (1777851). Oersted showed that an electr... | <urn:uuid:ba988973-8b57-4444-a4ff-a1ed0f2a301a> | 3.8125 | 221 | Truncated | Science & Tech. | 43.15022 |
Johhny Electriglide wrote:
Read Hansen's "Storms of My Grandchildren". It is a common misconception to lump Gen IV nuclear with the other ones. Gen IV reactors use the waste of the other reactors and produce very little and only 10 year half life waste themselves. There is enough nuclear waste stored to power all of th... | <urn:uuid:e45dc781-1716-4093-ae00-b1cb4abc0885> | 2.703125 | 333 | Comment Section | Science & Tech. | 53.106778 |
Would rotating arms on a spacecraft (like in Sci-Fi movies) actually produce artificial gravity?
It’s pretty common in Sci-Fi movies to have a spacecraft with rotating arms that create artificial gravity for the craft. Would this really generate sufficient centrifugal force to create artificial gravity? Would those arm... | <urn:uuid:b4eee250-0346-4097-9d51-2187733e1fa6> | 3.546875 | 176 | Q&A Forum | Science & Tech. | 43.237132 |
Radical plan to combat global warming 'may raise temperatures'
A controversial proposal to create artificial white clouds over the ocean in order to reflect sunlight and counter global warming could make matters worse, scientists have warned.
The proposed scheme to create whiter clouds over the oceans by injecting salt... | <urn:uuid:c7e317f3-e3f3-4625-afdd-39d6f14303c2> | 2.984375 | 1,074 | Truncated | Science & Tech. | 35.540882 |
Marissa Ahlering is a prairie ecologist for The Nature Conservancy in Minnesota, North and South Dakota. Dr. Ahlering is monitoring the Conservancy’s prairie sites, gathering the data needed to guide their management. She knows these prairies well, having done research on the habitat needs of two grassland-nesting bird... | <urn:uuid:c63ab4c5-99d9-4550-bb1a-1ec621b36a4d> | 2.734375 | 506 | Content Listing | Science & Tech. | 32.153158 |
Humans were the main culprit behind a series of ancient bird extinctions, according to a newly published report. Writing Monday, scientists pointed to human colonization of the Pacific Islands has th
Posted by Brian 57 days ago (http://www.theverge.com)
A 30-year study of birds and roadkill may have given us a look int... | <urn:uuid:3d4f7951-918f-40ae-b066-de54b721db9c> | 2.6875 | 385 | Content Listing | Science & Tech. | 60.435101 |
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an... | <urn:uuid:857fe859-79a1-4220-ac24-99e99ff73ca4> | 2.796875 | 387 | Content Listing | Science & Tech. | 49.234955 |
The muon (from the letter mu (μ)--used to represent it) is an elementary particle with negative electric charge and a spin of 1/2. It has a mean lifetime of 2.2μs, longer than any other unstable lepton, meson, or baryon except for the neutron. Together with the electron, the tau, and the neutrinos, it is classified as ... | <urn:uuid:2037f363-fff7-488a-9f6d-49b0c0a6b5d8> | 3.953125 | 1,602 | Knowledge Article | Science & Tech. | 36.328926 |
Sour Showers; September 2010; Scientific American Magazine; by Michael Tennesen; 2 Page(s)
The acid rain scourge of the 1970s and 1980s that killed trees and fish and even dissolved statues on Washington, D.C.’s National Mall has returned with a twist. Rather than being sulfuric acid derived from industrial sulfur emis... | <urn:uuid:82243c8f-bce8-447f-811d-f505964da49f> | 2.90625 | 192 | Truncated | Science & Tech. | 50.142047 |
Rivers and streams are reaching record levels as a result of Hurricane Irene’s rainfall, with more than 80 USGS streamgages measuring record peaks.
Tuesday, August 23, 2011 at 01:51 PM a 5.8 Earthquake occurred 38 miles outside of Richmond, VA.
USGS scientists study walruses off the northwestern Alaska coast in August ... | <urn:uuid:0efb218b-3c13-4f0e-8b95-319823697428> | 3.109375 | 375 | Content Listing | Science & Tech. | 31.858776 |
WorldChanging has covered the rising trend of biomimicry before: taking design cues directly from nature.
The latest example comes from Wilmington, DE company NanoCyte, which has filed a patent application for a dermal injection system utilizing the stinging cells of jellyfish.
Jellyfish and other Cnidaria have stingin... | <urn:uuid:06328218-1ebb-4adb-9d68-a589cdf9abab> | 2.6875 | 648 | Comment Section | Science & Tech. | 51.158453 |
The north of England is dominated by rocks of Carboniferous age, which give it a distinctive scenery and history, where local coal fuelled the world’s first industrial landscape.
The geology is extremely well known, because of the importance of the coal deposits, but also because of the continuing excellence of the Bri... | <urn:uuid:32ba81f2-64ae-4fd9-ab57-a5929aba7358> | 3.71875 | 1,725 | Academic Writing | Science & Tech. | 39.30795 |
A linked list can be viewed as a group of items, each of which points to the item in its neighbourhood. An item in a linked list is known as a node. A node contains a data part and one or two pointer part which contains the address of the neighbouring nodes in the list.
Linked list is a data structure that supports dyn... | <urn:uuid:cb3e8cd7-cf53-4514-a447-17688d3a16ad> | 3.71875 | 779 | Documentation | Software Dev. | 47.018399 |
Catlin Arctic Survey 2010
The 2010 Arctic Survey focused on the implications of sea ice loss, specifically ocean change and acidification. The expedition carried out vital research into how greenhouse gases (GHG) could affect the Arctic Ocean's marine life, including species that are essential to life on our planet.
Hi... | <urn:uuid:940bd1ec-deb3-4468-a171-5e558b752be6> | 3.8125 | 634 | Knowledge Article | Science & Tech. | 32.985441 |
Photo taken by Mark J. Madigan - Walsenburg, Colorado - May 20, 2003
Lenticular clouds, technically known as altocumulus standing lenticularis, are stationary lens-shaped clouds that form at high altitudes, normally aligned at right-angles to the wind direction.
Where stable moist air flows over a mountain or a range o... | <urn:uuid:68001368-9bc3-499b-a127-5687e260aa99> | 3.203125 | 830 | Personal Blog | Science & Tech. | 43.36898 |
Hurricanes are also well-known for their furious wind speeds, but the strongest hurricanes recorded had wind speeds between 160 and 190 mph.
Tornadoes produce the strongest wind speeds known to man, with the strongest of the strong estimated to produce wind speeds of 261-to-318 mph, but there has yet to be a wind gauge... | <urn:uuid:c4edd180-aca9-4441-a4f8-b9b94149c2f2> | 3.03125 | 131 | Knowledge Article | Science & Tech. | 59.504311 |
The sun's new solar cycle, which is thought to have begun in December 2008, will be the weakest since 1928. That is the nearly unanimous prediction of a panel of international experts, some of whom maintain that the sun will be more active than normal.
But even a mildly active sun could still generate its fair share of... | <urn:uuid:377a04c3-5dcf-43d6-9677-165f07daf271> | 3.578125 | 3,731 | Comment Section | Science & Tech. | 63.767997 |
When we analyzed the two-slit experiment and the diffraction grating, we assumed that the individual slits were so narrow that they acted like point sources of waves. That is an accurate approximation if the slits are narrow compared to the wavelength. But in the case of wider slits, even a single slit causes a diffrac... | <urn:uuid:c8e165c7-f6a7-4b50-b1b2-5de69ff3666e> | 4.40625 | 389 | Academic Writing | Science & Tech. | 65.504398 |
Cyberdyne Systems Corporation is working on a powerful new processors, but due to a management snafu, the management has only allowed your code 512 Kilobytes (524288 Bytes) to implement your application's heap! For those unfamiliar with the heap, it is an area of memory for processes where (the process) can allocate va... | <urn:uuid:9fd62f98-d28a-420d-8f6b-04dfbcb4fcd2> | 3.015625 | 741 | Documentation | Software Dev. | 44.594038 |
Earthscope (Image 5)
June 11, 2010
A completed transportable array station on Lummi Island, Wash. The station will record earthquakes occurring locally, nationally and worldwide. Scientists will use the data to produce images of the Earth's interior and to produce new insights into the earthquake process. [One of 14 re... | <urn:uuid:341c062a-c2cf-4f6d-a790-d9ea3a93763f> | 4.09375 | 387 | Knowledge Article | Science & Tech. | 23.799392 |
In this segment, Ira talks with author Alan Weisman about what the world might be like if humans were suddenly to disappear from the planet. Would a human-free Earth be more environmentally friendly? Would a sudden removal of humans disrupt the planet's ecosystems still more? In his book "The World Without Us" (St. Mar... | <urn:uuid:15843660-ff85-4506-8d15-a2e138135f93> | 2.796875 | 191 | Truncated | Science & Tech. | 56.303384 |
Bizarre Weather Around the Solar System
Hurricanes, tornadoes, and sulfuric-acid rain.
Bizarre weather is not restricted to Earth. Hurricane Sandy was a speck of dust compared to some of the cataclysms currently taking place around the solar system. Jupiter, for example, is going through a tumultuous time right now. Th... | <urn:uuid:e18e5ed7-9b50-4d5e-8ed2-46e748daccc1> | 3.34375 | 1,638 | Content Listing | Science & Tech. | 53.08112 |
There are currently more than 7,500 offshore oil platforms actively probing the earth’s crust for black gold. Their relatively minimal appearance at the surface belies the shear magnitude of human construction beneath the waves. Oil platforms are among the world’s tallest man-made structures. Compliant tower platforms ... | <urn:uuid:dc672d03-2371-49c2-9d9e-3f3c0b9799e3> | 3.265625 | 924 | Nonfiction Writing | Science & Tech. | 38.735617 |
Meet Kimberly Casey: Studying How Debris Influences Glaciers
Kimberly Casey is a glaciologist who spends a fair amount of time in the office analyzing satellite data. But when she talks about her fieldwork on remote glaciers, one suspects she could do pretty well in a triathlon, too. Casey has carried 70-pound backpack... | <urn:uuid:b648c969-49ec-4b68-bb1a-b2d2d4ab78b5> | 3.859375 | 2,172 | Audio Transcript | Science & Tech. | 60.039724 |
This page is supposed to hold ideas and goals for 3D rendering in GeoTools/GeoWidgets.
This is a call for opinions and ideas. So please answer.
Anything geometry-related I could find.
Any more known geometric-related libraries?
It would be favourable to have 1D-3D objects stored in an intuitive, geography-aware geometr... | <urn:uuid:7e05e520-b199-4438-9fab-cf28ad68a2b7> | 2.90625 | 1,347 | Comment Section | Software Dev. | 57.023365 |
The following is shared from the frequently asked questions page on the Center for Invasive Species Research website…
How do invasive species move from place to place?
Invasive species reach new areas outside of their home range in one of two ways: (1) self introduction on their own, or (2) with human assistance that m... | <urn:uuid:42545fbc-479b-40e2-91ec-6cfe7a269dfc> | 3.796875 | 571 | Personal Blog | Science & Tech. | 44.883419 |
Dec 15, 2000, 2:56 PM
Post #1 of 8
Quiz 1 -- Equal Parts
String Division (2 Quizzes in 1!)
Given a string, how can you efficiently divide the string into x pieces, where each piece has y characters, except for possibly the last, which has between 1 and y characters?
For the love of Perl, please test your solutions befo... | <urn:uuid:415b15b4-9ad2-4a85-9427-d81dfc1ec8ec> | 4.09375 | 339 | Comment Section | Software Dev. | 62.181544 |
Generally, weather-related science fair projects score well with teachers and judges because they require time and effort, much like plant projects. It is possible to do idea #2 or #3 in a weekend if the weather cooperates (i.e. it rains or snows when you need it to), but typically you will need at least 1 month, and 6... | <urn:uuid:194133bf-1a3c-4f23-a7e9-cc6b0958934e> | 3.140625 | 490 | Tutorial | Science & Tech. | 57.124983 |