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How Do We Know Light Behaves as a Wave?
Visit The Physics Classroom's Flickr website and enjoy a photo overview of the topic of light interference.
Looking for a lab that coordinates with this page? Try the Ripple Tank Lab from The Laboratory.PhET Simulation: Wave Interference
This PhET simulation provides a virtual en... | <urn:uuid:5414b196-0c80-40c6-a3e1-8e84d07777ab> | 3.859375 | 2,129 | Tutorial | Science & Tech. | 38.400838 |
I recently bumped into an acquaintance outside the Staples Center after a Lakers game. Neither of us was aware the other was at the game. Yet, even if we had known and were intentionally keeping an eye out for one another, we probably would never have been able to connect; the crowds at Lakers games are just too heavy.... | <urn:uuid:b633120a-7106-4d42-a9a4-eec952fa4080> | 3.21875 | 599 | Knowledge Article | Science & Tech. | 33.272133 |
Today, life on the moon. The University of
Houston's College of Engineering presents this
series about the machines that make our
civilization run, and the people whose ingenuity
As I sit down to type, I
first have to turn off my SETI screensaver. My PC
computes fast Fourier transforms in the background
while I work --... | <urn:uuid:a5c0cffe-60c1-4d7c-b3d6-1d9ae5666090> | 2.984375 | 1,511 | Nonfiction Writing | Science & Tech. | 59.211184 |
The EPIC-MOS instruments on-board XMM-Newton
- What do the cameras measure?
- Example observations by EPIC-MOS
- Modes of the EPIC-MOS Camera
- X-ray telescope Mirrors
For many more images of both XMM-Newton hardware and astronomical observations, please see the ESAC XMM-Newton gallery page.
XMM-Newton has 3 X-ray tele... | <urn:uuid:19e83dd9-ad9f-48a0-ba07-cf53bb5b4c95> | 3.28125 | 2,232 | Knowledge Article | Science & Tech. | 53.849709 |
Brouwer E. M., P. (1996) Decomposition in situ of the sublittoral Antarctic macroalga Desmarestia anceps Montagne. Polar Biology, 16, 129-137. ISSN 0722-4060.
|PDF - Published Version |
Restricted to KNAW only
Official URL: http://dx.doi.org/10.1007/BF02390433
Large amounts of detached Antarctic macroalgae accumulate i... | <urn:uuid:b8405443-c1ad-4bba-bfc4-7f1abeb1fdcf> | 2.734375 | 386 | Academic Writing | Science & Tech. | 40.512569 |
Japan launched a new earthquake warning system in 2007.
It uses sensors that pick up the faster-moving and less destructive P-waves produced by an earthquake and transmits a warning broadcast on television and radio before the destructive S-waves and surface waves arrive, giving recipients of the message, precious seco... | <urn:uuid:8163deef-ed20-417b-a6ad-7a655a601ac5> | 3.671875 | 949 | Knowledge Article | Science & Tech. | 47.992006 |
|Contained in||Block-level elements, inline elements except BUTTON|
The BUTTON element defines a submit button, reset button, or push button. Authors can also use INPUT to specify these buttons, but the BUTTON element allows richer labels, including images and emphasis. However, BUTTON is new in HTML 4.0 and not as wid... | <urn:uuid:81844278-1d90-49aa-8f86-bff75cc3069e> | 3.09375 | 547 | Documentation | Software Dev. | 33.395 |
Android is able to animate any View object and each and every View has a startAnimation() method that launches animation. Animations exist as independent objects that can be applied to the Views. Animation objects can even be populated from XML resources that live in the res/anim directory.
You can download the example... | <urn:uuid:dc2926f3-216f-4fb3-a014-54f6cbfc965f> | 2.796875 | 489 | Personal Blog | Software Dev. | 65.188667 |
With 700 physicists from 90 different institutions in 20 countries working on an experiment, you expect interesting results. And the DZero experiment at Fermi National Accelerator Laboratory is living up to the expectation. Scientists at Fermilab have been studying a subatomic particle known as the B_s meson (pronounce... | <urn:uuid:a7ee8b09-543e-41e0-8927-6cbcf8b9a0d0> | 3.359375 | 506 | Knowledge Article | Science & Tech. | 39.758526 |
Mauquoy, D., Blaauw, M., van, Geel, B., Borromei, A., Quattrocchio, M., Chambers, F.M. and Possnert, G. 2004. Late Holocene climatic changes in Tierra del Fuego based on multiproxy analyses of peat deposits. Quaternary Research 61: 148-158.
What was done
Changes in temperature and/or precipitation were inferred from pl... | <urn:uuid:43f8e4dd-7d1a-435f-8864-93006b8b56e8> | 3.0625 | 603 | Academic Writing | Science & Tech. | 53.621693 |
In an article published in the journal Ecology and Evolution, Forest Service Southern Research Station researchers Susan Loeb and Eric Winters discuss the findings of one of the first studies designed to forecast the responses of a temperate zone bat species to climate change.
The researchers modeled the current matern... | <urn:uuid:54ac870c-5ae6-407e-9e8d-246de3373786> | 3.734375 | 1,305 | Knowledge Article | Science & Tech. | 40.89089 |
Why is it that when you touch really cold metal, your skin gets stuck?
(Lansing State Journal, November 18, 1992)
When you touch cold metal, you skin is at a higher temperature than the metal. The heat from your hand flows from your finger to the metal. Metal conducts the heat so well that if you were to touch a very c... | <urn:uuid:9a6fa4de-1deb-479b-ace0-ae4ebfeba731> | 2.78125 | 158 | Q&A Forum | Science & Tech. | 69.126818 |
|May3-11, 05:17 AM||#1|
Which one of the statements below specifies the critical basis of the apparatus used in the Michelson/Morley experiment?
A) The half-silvered mirror must reflect exactly half the light.
B) Mirror 1 and mirror 2 must be identical.
C) The distance travelled by light using either path must be equal... | <urn:uuid:60918e75-5f3b-4fc2-851b-3fe21946e93a> | 3.28125 | 313 | Comment Section | Science & Tech. | 50.583551 |
Wild Things: Life as We Know It
Orchids, Baboons, Ancient Reptiles and More...
- By T. A. Frail, Jesse Rhodes, Jessica Righthand, Brandon Springer and Sarah Zielinski
- Smithsonian magazine, September 2010
Researchers in Ecuador have discovered a new trick from a famously deceptive family of flowers. The Dracula orchid... | <urn:uuid:2f20d302-9740-4148-a948-4d40cd2556a9> | 2.953125 | 350 | Content Listing | Science & Tech. | 39.163333 |
I started using Git a few years ago, and to be sure, I cannot say that I know everything about it. However, I know enough of it to say that I am much more efficient using Git than other source control method.
In this post, I will summarize some of the commands everyone need to know in order to start using Git.
Creating... | <urn:uuid:39ac724f-8805-4243-a886-61bbcd4614ff> | 2.875 | 857 | Personal Blog | Software Dev. | 52.648447 |
The physics of a ball rolling inside a cylinder is worked out in the paper by Gualtieri et al; they analyze the various forces involved, notably a Coriolis torque that acts around the
-axis. A physical demonstration of the process is described in the paper by Matsuura. We enhanced the work of Gualtieri et al by allowin... | <urn:uuid:e433e361-a712-4b27-b239-8c9ff32a76b0> | 3.265625 | 332 | Knowledge Article | Science & Tech. | 59.68087 |
ON-SITE WASTEWATER DISPOSAL
Wastewater from sinks, tubs, showers, dishwashers, clothes washers and toilets flows into the household septic system. The wastewater (averaging about 55 gallons per person per day according to Massachusetts Title 5 Sanitation Code) contains human waste products in addition to other solids, ... | <urn:uuid:38049a77-98c1-4b8d-8ac7-5336e4a00c45> | 3.640625 | 281 | Knowledge Article | Science & Tech. | 33.591274 |
The vegetation of an infrequently burned Tasmanian mountain region
Kirkpatrick, JB and Harwood, CE (1980) The vegetation of an infrequently burned Tasmanian mountain region. Proceedings of the Royal Society of Victoria, 91 . pp. 79-107. ISSN 0035-9211
|PDF - Requires a PDF viewer|
The Mt. Bobs-Boomerang area in souther... | <urn:uuid:ec8d3e55-51b0-43a3-b04c-e75f1b3655f3> | 3.171875 | 434 | Academic Writing | Science & Tech. | 39.39157 |
There are many different ways of conceptually approaching
quantum field theory. I find that the
most satisfying way of understanding quantum field theory is to
think of it as a cross between special relativity and quantum mechanics.
Quantum Mechanics deals with the behavior of some given
number of particles which may i... | <urn:uuid:1bc6e14d-53e5-42d9-8296-83fc8e2f9737> | 2.859375 | 902 | Personal Blog | Science & Tech. | 31.292225 |
Hey im new here and I need some math help FAST!
Is there anyone who can solve these and show the work?
Im kind of confused...
Sorry if its sloppy,
Thanks in advance,
if the polygons are regular then the distance from the vertices to the center are equal
further you can solve for the angle between the line segment joini... | <urn:uuid:2bb622ab-8bb6-4fc7-8d25-2f25a93b673f> | 3.484375 | 332 | Q&A Forum | Science & Tech. | 30.897418 |
These two group activities use mathematical reasoning - one is
numerical, one geometric.
Suppose there is a train with 24 carriages which are going to be
put together to make up some new trains. Can you find all the ways
that this can be done?
How could you put eight beanbags in the hoops so that there are
four in the ... | <urn:uuid:74e093d5-f760-4689-ab43-6fd71ecaf88b> | 3.5 | 1,591 | Content Listing | Science & Tech. | 75.350139 |
Hey guys i have a small problem i have a program that is repeating using "do while" the program basically does some simple calculations lets say u enter a bet it calculates how much you won based on the bet...the problem is i want to tally all the money the person gets when the loop is executed multiple times how can i... | <urn:uuid:268245a8-c635-4cd5-ad13-4aa8f926a3f9> | 2.8125 | 274 | Comment Section | Software Dev. | 78.275543 |
The Arabia Terra region on Mars is populated with numerous craters, filled with deposits of various materials that, over time, have become severely eroded. The latest images acquired by the HRSC camera show many features of this kind, known as 'yardangs', in Danielson Crater; the different types of material these conta... | <urn:uuid:d7a7685f-103f-4d67-836d-a02a1af9bb5f> | 3.5625 | 635 | Content Listing | Science & Tech. | 33.884151 |
Published by the American Geological Institute
and Trends in the Geosciences
A NEW LOOK AT NATURAL DISASTERS
by Timothy A. Cohn and Kathleen K. Gohn
Natural hazards become disasters only when they collide with people.
|ABOVE: El Niño brought on heavy rains in 1998 that plagued the northwestern United States with landsl... | <urn:uuid:274407ce-9499-4106-ae92-998e546cf267> | 3.640625 | 1,859 | Nonfiction Writing | Science & Tech. | 29.093302 |
To improve performance of graphics output, most graphics devices provide some form of buffering. By default, Scheme's graphics procedures flush this buffer after every drawing operation. The procedures in this section allow the user to control the flushing of the output buffer.
Enables buffering for graphics-device. In... | <urn:uuid:13cd9abd-59d1-4883-a412-850b736bdb93> | 2.78125 | 166 | Documentation | Software Dev. | 27.043077 |
Joined: 16 Mar 2004
|Posted: Wed Mar 21, 2007 11:58 am Post subject: Reading data stored as nuclear spins - Quantum Computing
|Reading data stored as nuclear spins
A University of Utah physicist took a step toward developing a superfast computer based on the weird reality of quantum physics by showing it is feasible to... | <urn:uuid:37c3d9ab-77ff-463c-8319-fc319bcbad0e> | 2.859375 | 1,226 | Comment Section | Science & Tech. | 43.78049 |
Home > News > Turning Gold Dust Into Clean Air
March 20th, 2008
Turning Gold Dust Into Clean Air
At age 82, William Miller might be excused for kicking back, playing with grandkids or simply puttering around. He's doing none of those things. Instead, Miller is leading a start-up with two big ambitions: to clean up dies... | <urn:uuid:b480c69b-49cc-4781-8c54-b5eea24a6912> | 2.703125 | 721 | Content Listing | Science & Tech. | 31.822424 |
Understanding W3C Schema Complex Types (10 tags)
W3C XML Schemas aren't so hard, says Donald Smith. In four steps he shows how to easily understand and use complex types.
W3C XML Schema Design Patterns: Dealing With Change (2 tags)
Designing schemas that support data evolution is beneficial in situations where the stru... | <urn:uuid:af240e04-3e15-45e9-a3fc-0e92333e7b0f> | 2.9375 | 274 | Content Listing | Software Dev. | 48.525 |
|Feb23-08, 10:38 AM||#1|
Gravity as consequence of universe expansion
I would like to suggest an explanation of the nature of the force of gravity. First I will state some well-known facts, then I will suggest an explanation and finally a hint for the way it might be proved correct.
1. Analysis of the spectrum of light... | <urn:uuid:acb92001-8d08-4485-8a1d-148c974e586b> | 2.71875 | 1,010 | Comment Section | Science & Tech. | 46.028025 |
The Amateur Scientist; March 2000; Scientific American Magazine; by Carlson; 2 Page(s)
In January of last year I described a delightful device for detecting microfluctuations in the earth's magnetic field. The instrument was a sensitive torsion balance consisting of two small rare-earth magnets affixed to a taut nylon ... | <urn:uuid:30486818-31a2-4567-855a-9929f78b58f7> | 3.0625 | 220 | Truncated | Science & Tech. | 37.153393 |
Molecular beacons would be ideal diagnostics for detecting point mutations in disease genes if they weren’t so hard to distinguish. These noose-shaped DNA segments are engineered to light up when they bind to target DNA, such as a mutated cancer gene. However, it has been difficult to detect the difference between comp... | <urn:uuid:ee74903f-ec2d-41bd-a901-8e30ea3c3158> | 3.265625 | 423 | Truncated | Science & Tech. | 24.739649 |
This image shows colliding galaxies.
Click on image for full size
Scientists have also found long, complex molecules such as amino acids, proteins, and polycyclic aromatic hydrocarbons (PAH's) in distant molecular clouds in interstellar space. But just as the formation of coacervates in the Miller Urey experiiment did ... | <urn:uuid:b11740eb-8fda-4f43-985a-bf8933eda198> | 3.125 | 132 | Content Listing | Science & Tech. | 27.041023 |
Super-Kamiokande is a 50,000 ton water Cerenkov detector located at a depth of 2700 meters water equivalent in the Kamioka Mozumi mine in Japan.
Click on image for full size
Image courtesy of the University of Maryland
The Super Kamiokande
Super-Kamiokande is a neutrino detector located in the
Kamioka Mozumi mine in Ja... | <urn:uuid:f5ea0da1-c492-4ac4-b140-da29a8fa822b> | 3.46875 | 547 | Content Listing | Science & Tech. | 48.072857 |
WASHINGTON — Theodore H. Maiman , a physicist who built the first operational laser in the United States and promoted its many medical applications after initial public concern that he created a "death ray," died May 5 at Vancouver General Hospital in British Columbia. He was 79 and had systemic mastocytosis, a rare ge... | <urn:uuid:25ef90f8-f0ce-49f0-854b-ee4a3462a622> | 3.1875 | 951 | Nonfiction Writing | Science & Tech. | 42.869225 |
Vegetation dynamics in response to fire and slashing in remnants of Western Basalt Plains grasslands
Meredith Henderson and Colin Hocking
- Vegetation dynamics in response to fire and slashing in remnants of Western Basalt Plains grasslands: Preliminary results (PDF - 193 KB)
About the report
The Western Basalt Plains ... | <urn:uuid:68d6b8af-833b-4cfd-a0de-c0a9e2555268> | 2.796875 | 390 | Academic Writing | Science & Tech. | 37.082637 |
While I’ve been so caught up in work and trying desperately to manage blog dramatics today, I very nearly missed writing this post. Today is Ada Lovelace Day, a day when you pick a woman who has inspired great change in this world in the fields of science, technology, engineering and math (STEM), and post about how the... | <urn:uuid:aa9cb6eb-9ac7-4288-b413-068545223cc9> | 3.09375 | 476 | Personal Blog | Science & Tech. | 32.978836 |
The Annihilation of Matter
By Dr. Michael Bisconti
I am just beginning to develop this article.
Modern physics tells us that matter does not exist in the way we think it exists. Matter does not exist in space. How is that possible? Matter is not objective. Matter is an idea. This is easily demonstrated by the dual natu... | <urn:uuid:5a674d0b-4bfd-46a0-a851-40883bc4e280> | 2.71875 | 79 | Truncated | Science & Tech. | 60.527589 |
<< Operator (C# Reference)
The left-shift operator (<<) shifts its first operand left by the number of bits specified by its second operand. The type of the second operand must be an int.
The high-order bits of first operand are discarded and the low-order empty bits are zero-filled. Shift operations never cause overfl... | <urn:uuid:0bb4d6af-82dc-43e1-830c-0578ab8f10c0> | 3.671875 | 138 | Documentation | Software Dev. | 34.48 |
Find information on common issues.
Ask questions and find answers from other users.
Suggest a new site feature or improvement.
Check on status of your tickets.
Scattering is a general physical process where some forms of radiation, such as light, sound, or moving particles, are forced to deviate from a straight traject... | <urn:uuid:3f0b6ee3-314d-42cb-a5e5-fc07282c11a3> | 3.078125 | 192 | Content Listing | Science & Tech. | 32.128052 |
Gravity is the force law that acts universally on all forms of matter and energy. If something exists, it must gravitate. Furthermore, gravity exerts the same acceleration on objects of different masses and energies! A feather is pulled by the Earth with the same acceleration as is an elephant - even a rather large ele... | <urn:uuid:9534aa2f-7c37-4203-8183-dfa619509787> | 3.75 | 955 | Personal Blog | Science & Tech. | 30.734459 |
What if some phylogenies were simply irresolvable? That is, what if, no matter how much data we collected, it would be impossible to reconstruct, with a high level of certainty, an accurate representation of the tree of life? That would suck. A lot. I have mentioned how this can result from long branch attraction or li... | <urn:uuid:9e075a66-242e-4194-8005-848ea74ce70f> | 2.921875 | 1,130 | Personal Blog | Science & Tech. | 48.859078 |
Radar and Sonar
William C. Vergara
Sometimes, when conditions are right, you can hear your own echo. If you shout "hello," the sound may bounce back at you from a large object. You then hear your own voice coming back. Your returning voice is called an echo. Radar and sonar are electronic devices that use the principle... | <urn:uuid:ba84bcc9-0bd4-4111-a58e-1a4ec2f07867> | 4.3125 | 2,339 | Knowledge Article | Science & Tech. | 52.907782 |
String Convert To From ASCII
From Erlang Community
You want to get the number representing the ASCII value of a character, or you want to display the characters associated with a particular ASCII numerical value.
All ASCII character values are identical to integers, and strings of characters are identical to lists of i... | <urn:uuid:bf572c32-fca2-4e31-abb7-5ca0616da372> | 3.53125 | 255 | Documentation | Software Dev. | 72.935576 |
|X-Ray Imaging Current-Driven Magnetic Domain-Wall Motion in Nanowires|
The quest to increase both computer data-storage density and the speed at which one can read and write the information remains unconsummated. One novel concept is based on the use of a local electric current to push magnetic domain walls along a th... | <urn:uuid:3fd6a929-31ee-4e08-8bc8-e391c706f07c> | 3.046875 | 944 | Academic Writing | Science & Tech. | 37.006537 |
Hall, Charles James: Hall Photon Theory
Exploring Force Fields & The Speed of Light
Below is a short excerpt from Charles James Hall's Photon Theory. The complete text of the first paper is in the Appendix of Millennial Hospitality III, The Road Home. The complete text of the later paper is in the Appendix of Millennia... | <urn:uuid:1def17c8-967d-4215-99bc-905a6077bdec> | 3 | 576 | Truncated | Science & Tech. | 33.36652 |
A View From Space: Weather Forecasting for Kids
Have you ever watched the weather reports on television and wondered how exactly the reporters know what the weather will be days from now? In a way they do guess, but it's definitely not a random guess! Weather forecasters, or meteorologists, use a number of special meth... | <urn:uuid:e76cd806-d901-4274-8746-bc65034b0f00> | 4.15625 | 617 | Knowledge Article | Science & Tech. | 50.321393 |
Higgs Boson discovery tops Science picks for 2012
- Published: 21/12/2012 at 08:46 AM
- Online news:
The discovery of the Higgs Boson, an invisible particle that explains the mystery of mass, leads a list of the top 10 scientific advances of 2012 released by the US journal Science.
Graphic distributed on July 4, 2012 b... | <urn:uuid:b5d00df7-d643-45dd-a36d-023f5f2535f5> | 3.125 | 779 | Truncated | Science & Tech. | 35.972803 |
You are confusing class instantiation with class loading. Before the class can be instantiated, the JVM must "know what it is". To do this, it loads the class. Loading takes place when the JVM starts up. I think it's more complex than that, but for now you can think of all your classes being loaded before your program ... | <urn:uuid:f8ac7b0a-873f-42c9-9eb1-804af07f2b1d> | 3 | 346 | Comment Section | Software Dev. | 65.613166 |
Preamble : Readers should be aware that the abbreviation PFCs is being used for two different classes of classes of products.
PFCs (perfluorocarbons), covered by the Kyoto Protocol, are organofluorine compounds that contain exclusively carbon and fluorine. Examples are CF4 (tetrafluoroethane) and C2F6 (hexafluoroethane... | <urn:uuid:40db9bc9-d021-479c-9b6f-2a0af0d43248> | 3.09375 | 488 | Knowledge Article | Science & Tech. | 27.565044 |
WIMPs (Weakly Interacting Massive Particles)
WIMPs, by definition, interact only very weakly and are expected to have a mass of between 10 and 1000 GeV. The only detectable interaction that WIMPs may undergo with `normal' matter is scattering and this is what dark matter detectors try to observe via different processes... | <urn:uuid:670971a9-5712-468c-8f1e-b2b9645d948c> | 3.125 | 531 | Knowledge Article | Science & Tech. | 35.291652 |
Saturday, February 2, 2002 11:03 AM
In addition to what Duncan said there is one more important difference between sleep and wait. When a Thread goes to sleep it retains any monitors that it had prior to going to sleep. When a Thread calls wait it releases the monitor of the object that its waiting on. It is extremely ... | <urn:uuid:6c87f708-2fc2-44fa-87a0-372a1957c7b3> | 2.921875 | 364 | Comment Section | Software Dev. | 54.617222 |
Time-Resolved Studies of Light Propagation in Crassula and Phaseolus Leaves
Publikation/Tidskrift/Serie: Photochemistry and Photobiology
Förlag: American Society for Photobiology
Time-resolved transmittance was used to extract in vivo optical properties of leaves of green plants experimentally. In time-resolved transmi... | <urn:uuid:74186cd2-a77c-401e-9375-8643cea3a7b2> | 3.046875 | 361 | Academic Writing | Science & Tech. | 30.283333 |
IT SOUNDS all wrongdrilling holes in a piece of wood to make it more resistant to knocks. But it works because the energy from the blow gets distributed throughout the wood rather than focusing on one weak spot. The discovery should lead to more effective and lighter packaging materials.
Carpenters have known for centu... | <urn:uuid:5054aa55-992e-44f1-995b-63508e03751a> | 3.90625 | 210 | Truncated | Science & Tech. | 49.974342 |
A revolutionary new computer based on the apparent chaos of nature can reprogram itself if it finds a fault
OUT of chaos, comes order. A computer that mimics the apparent randomness found in nature can instantly recover from crashes by repairing corrupted data.
Dubbed a "systemic" computer, the self-repairing machine n... | <urn:uuid:4182bc71-bfe5-4d2d-a544-8947a80013b0> | 3.578125 | 1,336 | Comment Section | Science & Tech. | 45.164371 |
Here’s a very cool (and somewhat mesmerizing) way to visualize surface winds across the country. It’s a project by Google computer scientists. Click hint.fm/wind and see animated streams of air come together, flow apart, and accelerate and decelerate. The map uses National Weather Service data, and refreshes hourly.
Ja... | <urn:uuid:4bec1b73-459f-4a48-a88c-fd135117dfcd> | 2.765625 | 186 | Personal Blog | Science & Tech. | 41.264983 |
We all know takeout food sometimes requires special utensils to be eaten properly. The same is true for fish. (The food they’re eating, not takeout fish.) Below, behold the first video of a reef fish using a tool — and traveling a great distance to find it.
The orange-dotted tuskfish, a species of wrasse, is the second... | <urn:uuid:a8bd15c4-77ce-4b3c-8585-40e7a0c883db> | 3.109375 | 345 | Truncated | Science & Tech. | 59.491596 |
Oil companies big and small have used technology to find a bounty of oil and natural gas so large that worries about running out have melted away. New imaging technologies let drillers find oil and gas trapped miles underground and undersea. The result is an abundance that has put the United States on track to become t... | <urn:uuid:98be622a-4084-4541-a509-4ffd436ec3e9> | 2.9375 | 1,163 | Content Listing | Science & Tech. | 31.040474 |
The greenhouse effect is the process in which the emission of infrared radiation by the atmosphere warms a planet's surface.
The name comes from an analogy with the warming of air inside a greenhouse compared to the air outside the greenhouse.
The Earth's average surface temperature is about 33°C warmer than it would b... | <urn:uuid:b0f7bbca-d686-4ead-95ab-cc6f30c40163> | 4.25 | 446 | Knowledge Article | Science & Tech. | 27.755625 |
In my mind, where I imagine people are so interested in what I do that they hang on every carefully chosen word I write, I imagine some unspecified mob of readers looking over my I *heart* cryptozoology post and going “Whoa now, pardner!” (yes, you all sound like cowboys in my mind) “You just said there was a differenc... | <urn:uuid:16981fed-8343-46b5-9fa2-b90c4bc10ee6> | 2.921875 | 432 | Personal Blog | Science & Tech. | 31.025833 |
Links to information on species of frogs, toads, and salamanders located in the southeastern United States and the U.S. Virgin Islands, with information on appearance, habitats, calls, and status, plus photos, glossary, and provisional data.
Manual for research program on the nesting habits of sea turtles of the Virgin... | <urn:uuid:ee15fb27-1238-440f-b620-9a7fe4bb204b> | 2.90625 | 177 | Content Listing | Science & Tech. | 33.30446 |
This is an infrared image of Jupiter showing regions which are hot.
Click on image for full size
The Source of Heat from Within Jupiter
Frequently in astromony, the luminoscity of a star is calculated. The luminoscity indicates the energy, and the temperature of the star.
When the luminoscity of the outer planets was c... | <urn:uuid:568a9586-12b4-442f-97c9-63fb6d18d287> | 3.609375 | 618 | Content Listing | Science & Tech. | 47.031376 |
At least 1,000 people have been injured in Russia as the result of a meteor exploding in the air. The energy of the detonation appears to be equivalent to about 300 kilotons of TNT, said Margaret Campbell-Brown of the department of physics and astronomy at the University of Western Ontario.
Meanwhile, an asteroid appro... | <urn:uuid:7aa1337c-b719-40bf-9c98-51e701dc42b6> | 3.484375 | 314 | Q&A Forum | Science & Tech. | 52.164395 |
That sea level rise isn’t the same everywhere. The moon’s pull, oceanic currents, the Earth’s rotation—these all play a role in what ocean water is where. Turns out the U.S. East Coast is experiencing sea level rise three to four times higher than the global average, according to a study from the U.S. Geological Survey... | <urn:uuid:d971b66c-99b7-4bd1-ae05-7827f071b2a9> | 2.9375 | 129 | Personal Blog | Science & Tech. | 59.308137 |
The best method to learn about how radio wave propagation works is to understand the basic principles of ionization and atmospheric impacts on shortwave, mediumwave, and other radio signals. The best article I have found on the subject is called HF Propagation from DeltaDX.com. Study it carefully and review the charact... | <urn:uuid:96425dbe-33a5-4766-873b-75bab1f4bcd5> | 2.765625 | 275 | Personal Blog | Science & Tech. | 68.211791 |
I was thinking about Fourier's Law in heat transfer today and for some reason I am just not understanding the relationships it gives us. Fourier's tells us that if the heat transfer rate is kept constant, then a larger thermal conductivity provides a smaller temperature gradient.
I am confused about the physical reason... | <urn:uuid:83f81552-da59-4ca3-b64e-1de6076e05cd> | 2.84375 | 134 | Q&A Forum | Science & Tech. | 29.04 |
Climate Literacy Essential Principle 2
*2a. Earth's climate is influenced by interactions involving the Sun, ocean, atmosphere, clouds, ice, land, and life. Climate varies by region as a result of local differences in these interactions.
*2b. Covering 70% of Earth's surface, the ocean exerts a major control on climate ... | <urn:uuid:bb7bc7b6-0599-4651-862d-6493f59d4f43> | 4 | 477 | Knowledge Article | Science & Tech. | 25.269535 |
Why Your Shared Library Code Is Slow
**Position Independent Code**
When you compile a shared library (with
-fPIC, in the case of
gcc), you are specifying that you want the compiler to generate *position independent code*.
Position independent code never uses straightforward machine addressing modes to access global var... | <urn:uuid:036afcfe-a46c-4dd9-8f68-94e3c41201df> | 2.75 | 1,458 | Documentation | Software Dev. | 47.825405 |
Conrotatory motion maintains C2 symmetry, and disrotatory
motion maintains Cs symmetry. We may therefore draw an
orbital energy correlation diagram, in which the orbitals of butadiene
are classified under Cs symmetry (a',a'',a',a''),
on the lhs, and under C2 symmetry (b,a,b,a), on the rhs. The
bonds of cyclobutene whic... | <urn:uuid:c33762be-2519-4cc4-be9e-1cd2656ddca9> | 2.96875 | 421 | Academic Writing | Science & Tech. | 46.007564 |
The pygmy beaked whale
), also known as the bandolero beaked whale
, Peruvian beaked whale
and lesser beaked whale
, is the smallest of the mesoplodonts and one of the newest discoveries. There were at least two dozen sightings of an unknown beaked whale named Mesoplodon sp. A
before the initial classification, and tho... | <urn:uuid:2f339f86-d83c-4b7b-8d0c-ccc75c7d3b7c> | 3.4375 | 665 | Knowledge Article | Science & Tech. | 58.79949 |
As quoted from spaceweather.com
ASTEROID FLYBY: NASA radars are monitoring 2005 YU55, an asteroid the size of an aircraft carrier, as it heads for a Nov. 8th flyby of the Earth-Moon system. There is no danger to our planet. At closest approach on Tuesday at 3:28 pm PST (23:28 UT), the 400m-wide space rock will be 324,6... | <urn:uuid:ea10aca6-5f14-435d-afb8-825c496520a5> | 3.21875 | 367 | Comment Section | Science & Tech. | 54.757353 |
In C++, polymorphism lets a variable refer to objects of different data types. The only catch is that the different data types must be members of the same inheritance hierarchy and they must be lower in the hierarchy than the variable's data type. The cool part is this ability lets the same instruction behave different... | <urn:uuid:ce48c95a-6f24-4434-b63c-7c902a07c6ca> | 4.03125 | 362 | Documentation | Software Dev. | 34.162091 |
Order of Operations
- Arrange students in pairs. Give each pair of students 16 blank cards. Have them write the numbers 0-9 and the symbols +, -, , ÷, (, and ) on the cards. Have one student use three numbers, two operations, and the parentheses to construct an expression. Have the other student evaluate the expression... | <urn:uuid:79daf820-7a04-4e70-8116-533fcf3f91dc> | 4.96875 | 273 | Tutorial | Science & Tech. | 50.525909 |
A class instance is created by calling a class object (see type-class). A class instance has a namespace implemented as a dictionary which is the first place in which attribute references are searched. When an attribute is not found there, and the instance’s class has an attribute by that name, the search continues wit... | <urn:uuid:c1573511-d138-4975-a269-2bfb5a60cb10> | 3.5 | 321 | Documentation | Software Dev. | 47.642013 |
- Futurity.org - http://www.futurity.org -
Hermit crabs gather to evict neighbors
Posted By Robert Sanders-UC Berkeley On November 5, 2012 @ 11:06 am In Top Stories | 2 Comments
UC BERKELEY (US) — Most social animals get together for protection or to mate or hunt, but terrestrial hermit crabs socialize to steal each ot... | <urn:uuid:b756ac34-06f0-4a03-b03c-ba3d862d55bd> | 3.109375 | 1,123 | Truncated | Science & Tech. | 47.426326 |
|Dec21-12, 06:22 AM||#1|
solar energy in space
Is it possible to use solar energy to provide locomotion in Space?
I appreciate that Solar sails have been mooted but is there any way that the energy from the sun can be used in such a way as to approach the source of the light?
|Dec21-12, 09:13 AM||#2|
If you can eject s... | <urn:uuid:e075a144-48ab-4c43-bcee-830a0adb781b> | 3.203125 | 1,042 | Comment Section | Science & Tech. | 52.780287 |
Global Climate Change is threatening the delicate balance of temperatures needed for survival of coral reef life.
In the struggle for life on this planet, man has clearly won. On land his traces are everywhere but recently he has gone under water too and the results are devastating. Hundreds of square miles of reef hav... | <urn:uuid:6939088a-8baf-4f62-a57b-726b5f296872> | 3.046875 | 483 | Truncated | Science & Tech. | 38.42194 |
An Asymptote is basically a line in which a graph approaches, but it never intersects the line. For example: In the following given graph of P =1 / Q, (here the x axis is denoted by ‘P’ and y axis is denoted by Q) the line approaches the p-axis (Q=0), but the line never touches it. The line can reach to infinity but it... | <urn:uuid:85fbaf1c-0b99-4cae-a7e5-7bff57b6de1f> | 4.375 | 756 | Tutorial | Science & Tech. | 55.584061 |
The Java.io.FilterReader class is for reading filtered character streams.Following are the important points about FilterReader:
The class itself provides default methods that pass all requests to the contained stream.
The Subclasses of FilterReader should override some of these methods and may also provide additional m... | <urn:uuid:08bd0f50-d5dc-4a3c-8274-073ceedbce69> | 2.90625 | 354 | Documentation | Software Dev. | 58.772659 |
divide by zero
this code was compiled with gcc 4.4.5 on Ubuntu, on execution an error message was thrown as "Floating point exception" But on changing datatype of j to float it produced "inf". I m not able to understand why it is not working same with j as int.
int i=60;int j=0;
"inf" is defined as part of the IEEE flo... | <urn:uuid:d080ee5d-e468-48cf-bc34-76ef1e6f74a0> | 2.796875 | 270 | Comment Section | Software Dev. | 57.209478 |
Honeybees have many adaptations for defense: Adults have orange and black striping that acts as warning coloration. Predators can learn to associate that pattern with a painful sting, and avoid them. Honeybees prefer to build their hives in protected cavities (small caves or tree hollows). They seal small openings with... | <urn:uuid:9c997ce9-b092-46b3-8842-31e8717ba644> | 3.921875 | 846 | Knowledge Article | Science & Tech. | 33.161774 |
One of Python’s most useful features is its interactive interpreter.
This system allows very fast testing of ideas without the overhead of
creating test files as is typical in most programming languages.
However, the interpreter supplied with the standard Python distribution
is somewhat limited for extended interactive... | <urn:uuid:429e2bfc-e293-4a18-b803-2fcfabaa272c> | 2.75 | 601 | Documentation | Software Dev. | 28.14313 |
What is ZEFF IN CHEMISTRY?
Separate topics with commas, or by pressing return. Use the delete or backspace key to edit or remove existing topics.
Virtual Chemistry Experiments Home Page. Zeff.html version 2.0 © Copyright 2000, 2009, David N. Blauch ...
Best Answer: You can estimate Zeff (Z*) using Slater's rules and th... | <urn:uuid:7db597ec-c051-4027-938c-1f9fd1950810> | 3.875 | 2,506 | Comment Section | Science & Tech. | 66.398251 |
Assembly: Microsoft.Xna.Framework (in microsoft.xna.framework.dll)
A texel represents the smallest unit of a texture that can be read from or written to by the GPU. A texel is composed of 1 to 4 components. Specifically, a texel may be any one of the available texture formats represented in the SurfaceFormat enumeratio... | <urn:uuid:d2339b6d-2cc0-4e2d-9a9d-9460040371d9> | 2.78125 | 158 | Documentation | Software Dev. | 48.641554 |
Fig 1: The top three panels show typical photographic views of deep-sea species. The lower panels show views that more closely approximate the real view under natural light. Note that animals that appear quite conspicuous under the submersible floodlights, such as the starfish and the fish, are fairly cryptic under amb... | <urn:uuid:1f1157d0-b55a-4d4a-91d5-53cd7cf919c0> | 3.140625 | 901 | Academic Writing | Science & Tech. | 48.806126 |
I think I've found a concise definition for type safety. I found it on the C2 wiki, which is a great source for programming related info. Anyway here it is:
Any declared variable will always reference an object of either that type or a subtype of that type.
A more general definition is that no operation will be applied... | <urn:uuid:72ca9eaa-aedd-46d6-a50e-c07c6dfc776e> | 3.078125 | 996 | Comment Section | Software Dev. | 44.549212 |
Returns the length in characters of the value of EXPR. If EXPR is
omitted, returns the length of
. If EXPR is undefined, returns
Like all Perl character operations, length() normally deals in logical
characters, not physical bytes. For how many bytes a string encoded as
UTF-8 would take up, use
length(Encode::encode_ut... | <urn:uuid:cc65718b-27a5-4bee-add7-48bb86613c61> | 2.859375 | 101 | Documentation | Software Dev. | 53.046 |
The Sun's energy, of course, comes from fusion.
I think there's a small and totally insignificant amount of fission going on as well.
The majority of the Sun's mass is hydrogen, and the vast majority of what isn't hydrogen is helium (with the ratio changing over billions of years as hydrogen is fused into helium). But ... | <urn:uuid:47c2e64d-f275-4973-ba76-4800e3cb3271> | 3.171875 | 385 | Q&A Forum | Science & Tech. | 54.267348 |
Tuesday, February 16, 2010
Oceans: Earth Ball Catch
Beg, borrow, steal or buy an inflatable globe or other spherical representation of the Earth that can be tossed around the classroom.
Have students throw the globe to one another around the room. When a student catches the globe, he/she should look to see if his/her l... | <urn:uuid:edfd9074-90fa-4a64-b0d0-2ea47bb1c3f4> | 3.34375 | 166 | Personal Blog | Science & Tech. | 61.904804 |
Single-channel recording is achieved by pressing a fire-polished glass pipette, which has been filled with a suitable electrolyte solution, against the surface of a cell and applying light suction. Under such conditions, the glass pipette and the cell membrane will be less than 1 nm apart. The tighter the seal will hav... | <urn:uuid:413687f6-3fcb-4de6-bf80-cd500d9311ac> | 3.21875 | 340 | Knowledge Article | Science & Tech. | 21.560627 |
Science Fair Project Encyclopedia
Johann Deisenhofer (born September 30, 1943) is a German biochemist who, along with Hartmut Michel and Robert Huber, received the Nobel Prize for Chemistry in 1988 for their determination of the structure of a membrane-bound complex of proteins and co-factors that is essential to photo... | <urn:uuid:9e722a1f-9c05-4aa4-b811-2f8fe72ec961> | 3.765625 | 293 | Knowledge Article | Science & Tech. | 24.366172 |
McIntosh's Law of Thermodynamics
by Derek Potter
Creationists often say that evolution is contrary to the second law of thermodynamics (2LT or SLOT) and hence impossible. Such a statement is liable to be met with uncomprehending stares from physicists who are not familiar with creationism. As its name suggests, thermod... | <urn:uuid:04f4cf34-e8ac-42a2-9e5d-e1f6c99e0b31> | 3.15625 | 3,380 | Nonfiction Writing | Science & Tech. | 42.801001 |
Testing an application prepared to run concurrent code can become a nightmare for old-fashioned testing platforms. Multicore testing requires new techniques, new expertise and new hardware. For example, you cannot guarantee a parallelized application's accuracy testing it on computers with single core microprocessors.
... | <urn:uuid:13a83a72-aa36-49ad-9903-73869de9f688> | 3.8125 | 729 | Personal Blog | Software Dev. | 36.836539 |
Wayne Stollings wrote:
The recent CO2 concentration increase in the atmosphere.
The seasonal cycle and the average trend
Looking at the seasonal cycle, we see the true CO2 absorptive ability of the biosphere. The present 295ppm is significantly higher than the 180ppm average of the last 1.1 million years, and significa... | <urn:uuid:5c3b888a-01f8-4629-b579-0e7a2c8ad4c4> | 2.765625 | 400 | Comment Section | Science & Tech. | 55.173939 |
Found a new "Ultimate" guide for molecular cloning construct design. It seems useful to most researchers.
This Molecular Cloning Guides covers:
Subcloning is a technique used to move a particular gene of interest from a parent vector to a destination vector in order to further study its functionality.
Use PCR reactions... | <urn:uuid:f29a6877-e260-4ea7-8493-4332c7067381> | 3.21875 | 310 | Comment Section | Science & Tech. | 29.345049 |
In his lab, USC's Dave Hutchins is simulating possible future atmospheres and temperatures for the Earth. He says he's trying to figure out how tiny organisms that form the base of the food web will react to a more carbon-intense ocean.
Burning fossil fuels doesn't just put more carbon into the atmosphere and help warm... | <urn:uuid:0b32932b-036c-4faf-86d4-c9423fbe40c9> | 3.71875 | 936 | Audio Transcript | Science & Tech. | 54.309302 |
Overview of Atomic Units
How Much Do I Already Know?
OverviewTwo of the more important units are the Bohr radius and the hartree:
Many times it is useful to express Hartrees, a unit of energy, in more familiar terms, specifically joules and/or kilocalories per mole. A table of constants and conversion factors is provid... | <urn:uuid:2873ac72-6d69-4a8d-8c77-a774235aebe7> | 3.34375 | 95 | Knowledge Article | Science & Tech. | 31.161033 |
Freshwater Pearl Mussel
Habitat and Distribution
The freshwater pearl mussel has very specialised habitat requirements which are found in many upland rivers in Scotland. Pearl mussels live partially or totally buried in coarse sand or fine gravel, often around boulders and other large rocks that help to stabilise the r... | <urn:uuid:37567933-ee2e-4708-be1a-2687fddfb19e> | 4.125 | 354 | Knowledge Article | Science & Tech. | 38.035495 |
An advantage compared with earlier Fortran standards is that
the standard now requires that the compiler can signal if the
user deviates from the permitted standard.
It is required that a Fortran 90 compiler can signal
- use of syntax not defined in the standard.
- violation of the syntax rules.
- use of kinds not avai... | <urn:uuid:bf4a9203-dcbd-4782-a425-5c2d7098e7da> | 3 | 193 | Documentation | Software Dev. | 46.193227 |
Evolution is the process of change through time. Many things evolve. Language evolves so that English spoken four hundred years ago during the time of playwright Shakespeare was very different than English spoken today. Technology evolves over time as new things are invented and modified. Scientific theories evolve as ... | <urn:uuid:a4ab0ea9-87a0-4208-94b2-3961be484786> | 3.703125 | 678 | Content Listing | Science & Tech. | 33.446659 |
Isn't this bat cute!
Click on image for full size
Courtesy of Corel Photography
Tropical Rain Forest Mammals
Did you know that some mammals can fly? That's right, bats and flying squirrels are mammals! There are many
kinds of bats in the tropical rain forest.
There are large bats, like the Indian flying fox. It's wings... | <urn:uuid:8574b88f-a194-4a89-8b9b-a9eb322e019f> | 3.25 | 533 | Content Listing | Science & Tech. | 72.458612 |