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In the weak interaction limit, behaviors of electrons can still be described by a 1-partitcle equation with a modified mass, where the change in mass can be understood as effects of other neighboring electrons as a single electron drags along. Since the cluster of electrons couples to gravity as usual, then the effecti... | <urn:uuid:f1826912-d56f-4253-bad6-f29cf30d66a5> | 2.609375 | 168 | Q&A Forum | Science & Tech. | 38.407985 | 4,100 |
The concepts behind earthquakes and living safely in earthquake country are as simple as a fishing line hooked to a stack of bricks, explains USGS geophysicist Ross Stein, whose family-friendly seismic demos and models are part of the tenth Triennial USGS Open House, May 19 and 20 at USGS’ Menlo Park Campus.
Stein has ... | <urn:uuid:73034a1a-4d8e-4496-8e85-8eaffda63a47> | 2.96875 | 879 | News Article | Science & Tech. | 49.064379 | 4,101 |
If you’re the type to worry, don’t click here — especially if the type of worrying you do is about things that sound really, really scary and that you have absolutely no control over. Clicking on that site you really shouldn’t click on will take you to a page on NASA’s Near-Earth Object Program website, which lists eve... | <urn:uuid:aaf243ca-7d15-4d8d-a500-8b162982a6f4> | 3.234375 | 1,400 | News Article | Science & Tech. | 63.588807 | 4,102 |
Mapping The Genomes Of Crocodiles And Alligators - It's Not For The Faint Of Heart!
David Ray never turns his back on his research, and with good reason! Ray and his team study alligators, crocodiles, and bats, among other creatures. With support from the National Science Foundation (NSF), this multidisciplinary team f... | <urn:uuid:ef7b2b34-87b1-4020-a58d-ff7a0211e785> | 3.40625 | 221 | Truncated | Science & Tech. | 39.922201 | 4,103 |
Browse Other Climate Resources
Here are additional resources relating to aspects of Climate Change from the SERC catalog. These resources have not been reviewed by the Climate Change Collection review team.
: Greenhouse Effect
[link browse_local.html?search_text=carbon cycle&search 'Carbon cycle']|
[link browse_local.h... | <urn:uuid:6e708047-7b01-4526-9ac0-7bb8687ad4db> | 2.828125 | 639 | Content Listing | Science & Tech. | 36.995012 | 4,104 |
Prepared by Paul Quay (University of Washington) and Will Frangos (James Madison University).
Since models only approximate natural phenomena, they are inherently inexact. The mathematical description can be imperfect and/or our understanding of phenomenon may not be complete. The mathematical parameters used in models... | <urn:uuid:9c0da97d-c040-4489-82dc-b9953391d325> | 3.46875 | 531 | Academic Writing | Science & Tech. | 19.845304 | 4,105 |
Since its discovery in 1801, Ceres (right) has been classified as a planet, an asteroid and a dwarf planet. It is the nearest dwarf planet to our sun.
Dawn traveled 2.8 billion kilometers (1.8 billion miles) to get from Earth to Vesta. It will travel another 1.6 billion kilometers (990 million miles) to get to Ceres.
D... | <urn:uuid:edbfc9e1-9c68-4177-ab98-ec818838c284> | 3.421875 | 125 | Knowledge Article | Science & Tech. | 72.887222 | 4,106 |
|Biomimetic Dye Molecules for Solar Cells|
Pressing energy problems provide opportunities for solid-state physicists and chemists to solve a major challenge: solar cell adoption. Though solar cells can use energy directly from the Sun to produce electricity that can be converted efficiently into other kinds of energy, ... | <urn:uuid:35c04184-ea69-4fbf-b394-5c9e995966a7> | 3.609375 | 956 | Academic Writing | Science & Tech. | 25.061602 | 4,107 |
Close full-size image and return to story.
Example of a narrow feature that needs to be seen in a 3-D image. The first parameter that has to be defined in this 3-D seismic design method is the smallest (narrowest) horizontal dimension of a feature that must be seen in the 3-D data volume. For purposes of illustration, ... | <urn:uuid:6864c700-7a22-4e66-a510-bc13f85de604> | 3.140625 | 178 | Documentation | Science & Tech. | 50.60105 | 4,108 |
CO2 less of a drag on orbiting space junk
Shrinking atmosphere Increasing levels of carbon dioxide in the upper atmosphere are allowing satellites, and space junk, to stay in orbit for longer, according to a new study.
The research, reported in the journal Nature Geoscience, helps explain why the upper atmosphere has c... | <urn:uuid:9504d885-8b46-4de7-a24f-115318f4faf3> | 3.59375 | 504 | News Article | Science & Tech. | 34.822519 | 4,109 |
Granular poison frog (Oophaga granulifera)
|Also known as:||Granular poison-arrow frog, granulated poison-dart frog|
|Synonyms:||Dendrobates granulifer, Dendrobates granuliferus, Ranitomeya granuliferus|
Classified as Vulnerable (VU) on the IUCN Red List (1) and listed on Appendix II of CITES (2).
ARKive is working wit... | <urn:uuid:f89e0bb6-5c7d-4b68-ab3a-8bb0977213d2> | 2.65625 | 280 | Knowledge Article | Science & Tech. | 13.693962 | 4,110 |
Deep Impact spacecraft eyes Comet ISON
The Comet ISON imaging campaign is expected to yield infrared data and light curves, which are used in defining the comet’s rotation rate, in addition to visible-light images.
February 7, 2013
NASA’s Deep Impact spacecraft has acquired its first images of Comet ISON (C/2012 S1). T... | <urn:uuid:3662686c-dca2-471a-88c9-8df3eb5d308f> | 3.4375 | 841 | Knowledge Article | Science & Tech. | 43.117171 | 4,111 |
Reaction Rate Problems
In class, you may often be asked to solve different types of reaction rate problems. When solving reaction rate problems, it is important to remember the reaction rate laws and the basics of balancing equations.
Alright so when you're union of kinetics and you have rate law problems here's some p... | <urn:uuid:d1f46976-450d-4c98-83da-84c31ace1a80> | 4.0625 | 1,970 | Tutorial | Science & Tech. | 69.070292 | 4,112 |
Donuca rubropicta (Butler) Hypsidia erythropsalis (Rothchild): Head-on view top, dorsal view below. More on moths
One of the icons of the northeastern Australian rainforests is the Hercules Moth, Coscinocera hercules, one of the world’s largest moths. Females are larger than the males, often attaining more than 20 cm a... | <urn:uuid:524dd7a9-f408-4c92-a6ca-99ae65d9786f> | 3.703125 | 1,164 | Personal Blog | Science & Tech. | 54.218731 | 4,113 |
Josephson received the 1973 Nobel Prize in Physics for discovery of the Josephson effect, which occurs in two superconducting layers separated by an insulating oxide. Under certain conditions current can pass through the insulator through tunneling of Cooper pairs of electrons. The effect has been used to design superc... | <urn:uuid:a3d380a3-f81a-4a21-92ba-249ff5aa55ff> | 3.84375 | 370 | Knowledge Article | Science & Tech. | 33.388882 | 4,114 |
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Differential scanning calor... | <urn:uuid:cba81686-6088-426b-90ef-ab0bd42cfbc3> | 2.53125 | 1,567 | Knowledge Article | Science & Tech. | 29.815417 | 4,115 |
Editor's note: Meg Urry is the Israel Munson professor of physics and astronomy and chairwoman of the department of physics at Yale University, where she is the director of the Yale Center for Astronomy and Astrophysics.
(CNN) -- Friday was an extremely unusual day, astronomically speaking. Just as scientists were gear... | <urn:uuid:aa68231f-8c75-48d6-8fd9-4663509c3609> | 3.546875 | 1,680 | Nonfiction Writing | Science & Tech. | 52.766333 | 4,116 |
The Power Behind The Throne
Peter J. D'Adamo, ND, MIFHI
Although just about everyone knows something about DNA, I’d like to take a few moments to introduce you to RNA, the real power behind the throne.
Protein represents what biologists call phenotype – the living, breathing, metabolizing part of life. DNA is informati... | <urn:uuid:e3d75442-1189-4c32-b265-7a5d0a75c29f> | 2.78125 | 1,109 | Personal Blog | Science & Tech. | 45.649526 | 4,117 |
Scientists are building a DNA library of the entire planet, a vast index of everything that's alive (including some things that might soon not be). But a recent study cautions researchers to be careful, as a scanning mistake here could have more severe consequences than getting overcharged at the checkout.
The Internat... | <urn:uuid:91a04259-d636-4ad3-a02f-077109cac7a6> | 2.984375 | 528 | Personal Blog | Science & Tech. | 31.97743 | 4,118 |
ML is well deserving of its popularity. Developers are finding myriad uses for it, including application configuration files and object persistence. While using XML in this capacity has many benefits, it can also become an organizational nightmare.
At first glance, a relational database management system (RDBMS) seems ... | <urn:uuid:44ced71e-5c83-4657-81c9-6f8c7fca162c> | 2.625 | 468 | Truncated | Software Dev. | 36.320211 | 4,119 |
New Emperor Penguin Colonies Found in Antarctica
While about 2500 chicks of emperor penguins were raised this year at the colony close to the French Dumont d'Urville Station, two new colonies totalling 6000 chicks have just been observed about 250 km away, near Mertz Glacier by the scientists Dr André Ancel and Dr Yvon... | <urn:uuid:075117c4-5cbd-4d35-84d5-e7cf8b699fbf> | 2.953125 | 461 | Truncated | Science & Tech. | 44.455021 | 4,120 |
This article, written by Charles W. Schmidt*, appeared first in Environmental Health Perspectives—the peer-reviewed, open access journal of the National Institute of Environmental Health Sciences.
The article is a verbatim version of the original and is not available for edits or additions by Encyclopedia of Earth edit... | <urn:uuid:229f3973-d1f0-4510-9448-4b2d01c50f66> | 3.4375 | 4,041 | Truncated | Science & Tech. | 46.156463 | 4,121 |
From an ecological point of view, Earth is made of the hydrosphere, the lithosphere, the geosphere and the biosphere. An assemblage of natural communities and species, within areas of ecological potential based on soil, climate and topography parameters are called ecoregions, and consitute a basic element in ecology.
M... | <urn:uuid:a63454e4-65d4-40e1-bbb5-4b36b89074e5> | 3.1875 | 245 | Knowledge Article | Science & Tech. | -19.235434 | 4,122 |
1 gigajoule = 277.78 kilowatt-hour.
(GJ) - One billion Joules or a thousand Mega Joules.)
a measure of heat or energy
A unit of energy equaling 943,213.3 Btu.
One billion joules. Annual gas usage of residential and commercial customers measured in gigajoule.
A joule is an international unit of energy defined as the ene... | <urn:uuid:ab620dac-e4f8-46c2-8a89-3be4886c58d2> | 3.0625 | 402 | Structured Data | Science & Tech. | 62.616458 | 4,123 |
ZPL is a new array programming language for science and engineering computation. Designed for fast execution on both sequential and parallel computers, it is intended to replace languages such as Fortran and C. Because ZPL benefits from recent research in parallel compilation, it provides a convenient high-level progra... | <urn:uuid:98ad36ca-0c87-40b0-8a1f-880b834d4600> | 3.484375 | 202 | Truncated | Software Dev. | 35.565518 | 4,124 |
OpenGL Shading Language
This document describes a programming language that is a companion to OpenGL 2.0 and higher, called The OpenGL Shading Language. The OpenGL Shading Language is part of the core OpenGL 4.3 specification.
- GLSL Reference Pages
- OpenGL 3.3 & GLSL
- OpenGL 4.1 & GLSL Quick Reference Guide
- OpenGL... | <urn:uuid:dcf64032-804f-48c0-8b69-d7425ff082f3> | 3.296875 | 337 | Documentation | Software Dev. | 40.195478 | 4,125 |
In 9847 a Sophic long range probeship, exploring along a line to anti-spinward and Rimward of the Periphery discovered an anomalous light signature while travelling through interstellar space. Upon altering course and performing a high-speed flyby of the phenomenon, the probe was able to determine that the light signat... | <urn:uuid:05f755db-4973-4e22-b12a-1a133920bca3> | 3.9375 | 811 | Knowledge Article | Science & Tech. | 32.490243 | 4,126 |
|Think about Loose Coupling|
The other day I was trying to find a way to find all possible combination of 2-4 particular letters of the alphabet (A, C, G, N, T), with repetition. The objective was to try to build an associative array of letter combinations and the corresponding ordered string. (See Sorting characters w... | <urn:uuid:777cab98-f8f3-4cba-ad01-53877b360ca9> | 3.09375 | 477 | Comment Section | Software Dev. | 56.005712 | 4,127 |
algal bloom oxygen level?
photosynthetic algae - photosynthesis takes place during daylight, CO2 is used and O2 is released. At night, aerobic respiration occurs, O2 is used and CO2 is given off.
If these two processes are in balance with each other (or are they?), how would an algal bloom decrease the O2 level in wate... | <urn:uuid:01e454a6-a884-4c81-8165-846db35528ba> | 3.234375 | 98 | Q&A Forum | Science & Tech. | 46.838288 | 4,128 |
how to make up 85% ammonium sulphate solution - (Sep/29/2008 )
I'm gonna make up 85% ammonium sulphate solution. My caculation is dissolve 850mg ammonium sulphate in H2O, make the total volume comes to 1 ml. By using this amount, I found it is impossible to make such a "huge" amount ammonium sulphate dissolve in only h... | <urn:uuid:1b157854-2f5f-4fb2-9de0-d7856a751212> | 2.59375 | 396 | Q&A Forum | Science & Tech. | 63.041623 | 4,129 |
A Million Random Digits with 100,000 Normal Deviates
Foreword to the Online Edition
This book was a product of RAND's computing power (and patience). The tables of random numbers in the book have become a standard reference in engineering and econometrics textbooks and have been widely used in gaming and simulations th... | <urn:uuid:a928b227-2611-4c7b-8a46-b69b617cbbca> | 2.8125 | 4,941 | Academic Writing | Science & Tech. | 70.623155 | 4,130 |
Photo by Thomas Hawk via Flickr Creative Commons
A long-standing Libyan weather record deemed invalid by the World Meteorological Organization has lifted Death Valley into the top spot for the hottest place on Earth, a distinction WMO calls "as symbolic for meteorologists as Mt. Everest is for geographers."
The new, of... | <urn:uuid:a255e77a-e566-4629-972c-815aefc6c91c> | 3.140625 | 384 | News Article | Science & Tech. | 27.143245 | 4,131 |
Space Historian Sees Cyborgs in Our Future
Albuquerque, N.M. - Fifty years after the dawn of the space age, hundreds of people have flown into space. A dozen of those left their boot marks on the Moon's surface, and several nations now are planning to send astronauts back to the Moon and then beyond. So you would think... | <urn:uuid:64d86552-1886-4f6d-8fb0-fdaf1eb05958> | 3.078125 | 889 | Truncated | Science & Tech. | 35.927526 | 4,132 |
The STORM model provides an estimate of the expected change in the ionosphere during periods of increased geomagnetic activity. The model estimates the departure from normal of the F-region critical frequency (foF2) every hour of the day for the current and previous day. Values are given in six separate geomagnetic lat... | <urn:uuid:fc799baf-337a-4795-93a9-a638fa553587> | 2.9375 | 1,000 | Knowledge Article | Science & Tech. | 49.179207 | 4,133 |
WebRef Update: Featured Article: Building Dynamic Pages with XML, XSL and JSP | 2
Building Dynamic Pages with XML, XSL and JSP
The directives in the "header" tell the JSP engine about the page and give it the opportunity to import supporting class libraries (such as the JDBC classes). One important directive is 'conten... | <urn:uuid:a03439b2-ea32-4fdd-a3cc-4956bb28ff15> | 2.515625 | 660 | Knowledge Article | Software Dev. | 55.310362 | 4,134 |
The stuff we're made of may be the means by which we store information that we want kept around long after we're gone.
Scientists have developed a technique of storing information in DNA, the molecule found in living creatures including humans that contains genetic instructions. The experiment is discussed in a new stu... | <urn:uuid:02f8d56b-69b0-437d-83b3-ffd50f4ef174> | 3.46875 | 439 | News Article | Science & Tech. | 45.1125 | 4,135 |
On October 15, 1996 ZetaTalk stated that Frog Populations with their vulnerable DNA would be affected
worldwide, the cause puzzling. On Jan 19, 2000 their declining numbers and confusion over the cause were
Frogs' Disappearance Baffles Scientists
Adapted from Genevieve Hussey's report, January 19, 2000
Australian scien... | <urn:uuid:77de15ab-2b4d-4cd3-bc98-49c1bd69fa25> | 3.109375 | 368 | News Article | Science & Tech. | 49.707865 | 4,136 |
Can you imagine living without the vertebrae in your neck? Surely no animal on earth has a backbone that doesn't connect with its skull. Think again ...
Larval (baby) fishes have skeletons made of cartilage. As the fish grows the cartilage ossifies (changes to bone). In the vast majority of bony fishes most of the flex... | <urn:uuid:4209c8be-758c-427c-9e94-7eec89d66a04> | 3.59375 | 601 | Knowledge Article | Science & Tech. | 49.099599 | 4,137 |
Net force, also known as resultant force, is a vector quantity produced when two or more forces act upon one object. The concept of net force is the same as the mathematical concept of vector addition.
Let's talk about net force. This is also sometimes called resultant force, those two words are used interchangenly and... | <urn:uuid:ef428e4a-db70-4c4b-9687-4e79138df8f6> | 4.375 | 565 | Knowledge Article | Science & Tech. | 66.840897 | 4,138 |
Conditions of Use
Elastic force and gravity
Elastic force is a force made from streching somthing As far as it can go. Like pulling a rubber band as far as it can go.Gravity is what keeps us on theground without it we would float everywere and would not touch the ground ever unles gravity came then we would.
Article po... | <urn:uuid:fbf3ad52-6fc4-4098-a4a9-916569d8a8d4> | 2.9375 | 139 | Comment Section | Science & Tech. | 64.834853 | 4,139 |
“…A Cal Tech seismologist was aware of the natural forces that are working slowly but inexorably under the earth, out of sight, unnoticed, setting off reactions and counterreactions in fragile earth faults deep in the bowels of the earth. There was no reliable way, despite all the scientific research, to predict them —... | <urn:uuid:89130d41-d4c2-4b0a-b0c3-d3e75e224d6f> | 2.859375 | 233 | Personal Blog | Science & Tech. | 41.039354 | 4,140 |
Most forecasting is easier and more reliable in the short run than over the long haul. Think of weather prediction. (And history is full of failed long-term forecasts of everything from oil prices to human population trends.)
But for scientists studying the fate of the vast ice sheets of Greenland and West Antarctica, ... | <urn:uuid:bb64bd05-e772-4c49-a22a-19149e00c0ec> | 3.1875 | 1,194 | Nonfiction Writing | Science & Tech. | 43.950756 | 4,141 |
|s-block in the periodic table|
||This article is in a list format that may be better presented using prose. (March 2013)|
The s-block is a block in the periodic table that consists of the first two groups, namely the alkali metals and the alkaline earth metals. The elements in the s-block generally exhibit well-define... | <urn:uuid:cdb91b30-f53c-4d5b-98c4-0ee4c5be7fc0> | 3.578125 | 881 | Knowledge Article | Science & Tech. | 48.409832 | 4,142 |
Controlling Invasive Exotic Plants in North Florida Forests (SSFOR19/FR133)
Invasive non-native organisms are one of the greatest threats to the natural ecosystems of the United States. Invasive plants reduce biodiversity, encroach on endangered and threatened species, and rob native species of habitat. This 8-page fac... | <urn:uuid:971cff2e-e4ad-444e-b6d3-c389b98fec99> | 3.0625 | 147 | News (Org.) | Science & Tech. | 21.98 | 4,143 |
ONU professor developing new technique to monitor phosphorus in watersheds
Christopher Spiese, Ohio Northern University assistant professor of chemistry, is working on the development of a new technique for measuring dissolved phosphorus in freshwaters that could introduce a new testing method that will allow for a mor... | <urn:uuid:9e614ed8-e676-433d-9194-7303cdef6008> | 2.90625 | 552 | News (Org.) | Science & Tech. | 8.256025 | 4,144 |
To begin with it's a well known result in gravitation that the sphere has geometry such that for gravitational calculations all it's mass can be considered to be concentrated at its centre for objects outside of its radius.
Second there is another result that states that if inside a spherical shell then there is no gra... | <urn:uuid:8a834973-80a1-4520-8176-9df1974a935c> | 3.8125 | 386 | Q&A Forum | Science & Tech. | 41.321248 | 4,145 |
This 3 part problem deals with functions from the set P of cell phones in use in the US to the set of natural Numbers N.
a) Write one interesting function f:P N that is injective. Define the function by giving a rule for it, i.e., (f(x)=...)
b) write a function f:P N that is not injective. Again, give a rule
c) Explain... | <urn:uuid:79b3bb3f-c423-498c-9dce-8bdf99d33884> | 2.890625 | 103 | Q&A Forum | Science & Tech. | 90.794153 | 4,146 |
John Matese and Daniel Whitmire, from the University of Louisiana at Lafayette, are claiming that data from NASA’s Wide-field Infrared Survey Explorer already suggests that there is a large planet in the outer solar system. This hypothetical planet, which they have nicknamed Tyche, orbits the sun at 15,000 AU’s and wei... | <urn:uuid:ee27cb3d-7482-44a0-9837-ae0c9240f9b7> | 3.3125 | 290 | Personal Blog | Science & Tech. | 55.124319 | 4,147 |
White Dwarf Star Spirals
Photograph courtesy NASA/Tod Strohmayer (GSFC)/Dana Berry (Chandra X-Ray Observatory)
About 1,600 light-years away, two dense white dwarfs in the J0806 binary star system orbit each other once every 321 seconds. When they reach the end of their long evolutions, smaller stars typically become wh... | <urn:uuid:03384b78-655b-40d9-b92a-595c1f446a16> | 3.5 | 317 | Content Listing | Science & Tech. | 53.661333 | 4,148 |
Sure glacier melt, sea level rise, extreme drought, and species loss get all the media attention — they are the Britney Spears, Paris Hilton, and Barack Obama of climate impacts. But what about good old-fashioned sweltering heat? How bad will that be? Two little-noticed studies — one new, one old — spell out the grim n... | <urn:uuid:02636f3d-beab-4cc0-a4c2-518f3c7c1745> | 3.609375 | 700 | Nonfiction Writing | Science & Tech. | 51.374747 | 4,149 |
The original question was: …true randomness on a quantum level has experimentally been shown to exist. My question is, does this quantum randomness ever/often/always bubble up to our readily observable world of Newtonian physics to create truly random everyday events?
Physicist: Hard to say.
Quick aside: The difference... | <urn:uuid:9d16ed53-e9f0-475e-853e-af2776530e2a> | 2.671875 | 1,212 | Q&A Forum | Science & Tech. | 41.506582 | 4,150 |
|Recognized since antiquity and depicted on the
shield of Achilles according to Homer,
stars of the
form the head of the constellation Taurus the Bull.
Their general V-shape is anchored by
the eye of the Bull and by far the constellation's brightest star.
Yellowish in appearance, red giant Aldebaran is not a Hyades clu... | <urn:uuid:e54cc1f2-425b-487c-abcc-9e4b24195e83> | 3 | 257 | Knowledge Article | Science & Tech. | 41.244469 | 4,151 |
Included here are more in depth explanations of some of the terms and processes in the Nuclear Fuel Cycle.
Nuclear Fuel is produced utilizing various elements and compounds in reactions that yied the product desired at the various stages. Initially uranium is the prime constituent looked for in its natural setting duri... | <urn:uuid:bb07d3a7-3da0-4ffa-842e-8015a1f3b547> | 4.125 | 3,194 | Knowledge Article | Science & Tech. | 38.11429 | 4,152 |
The Message widget is a variant of the Label, designed to display multiline messages. The message widget can wrap text, and adjust its width to maintain a given aspect ratio.
When to use the Message Widget
To create a message, all you have to do is to pass in a text string. The widget will automatically break the lines... | <urn:uuid:89a05ea1-f000-4d50-8c76-05ebbedd7802> | 2.984375 | 803 | Documentation | Software Dev. | 54.922008 | 4,153 |
Home > Nanotechnology Columns > NanoGlobe > Indonesian Researchers Developing Bio-Nanocomposite from Cellulose Fibers
Indonesia, blessed with abundant natural resources, is on its way creating new materials that are natural and more environmentally friendly for eco-friendly applications including bio-automobile, organi... | <urn:uuid:814f99c3-f217-43e4-af26-fd32f5989726> | 2.515625 | 923 | News (Org.) | Science & Tech. | -4.697705 | 4,154 |
This primer is designed for undergraduate students taking short courses in biodiversity and aims to provide an overview of the subject, as well as acting as an entry point to the primary literature. Also of interest to ecologists and biogeographers wanting to get to grips with the main issues and concepts. The new edit... | <urn:uuid:23893965-cb8f-4432-b5bb-b84335348bcc> | 3.625 | 467 | Product Page | Science & Tech. | -11.948286 | 4,155 |
Describing Motion with Diagrams
Visit The Physics Classroom's Flickr Galleries and take a visual overview of 1D Kinematics.
Introduction to Diagrams
Throughout the course, there will be a persistent appeal to your ability to represent physical concepts in a visual manner. You will quickly notice that this effort to pro... | <urn:uuid:87dcf928-0fad-4198-b047-730821e5f217> | 4.21875 | 375 | Tutorial | Science & Tech. | 43.895728 | 4,156 |
Mechanics: Newton's Laws of Motion
Newton's Laws of Motion: Audio Guided Solution
Skydiving tunnels have become popular attractions, appealing in part to those who would like a taste of the skydiving experience but are too overwhelmed by the fear of jumping out of a plane at several thousand feet. Skydiving tunnels are... | <urn:uuid:2025d2ed-0d97-43f6-9bfc-e5957318fe85> | 3.546875 | 371 | Tutorial | Science & Tech. | 56.767316 | 4,157 |
|Mar26-09, 09:10 AM||#1|
Magnetic force on a wire
1. The problem statement, all variables and given/known data
A wire is oriented along the x-axis. It is connected to two batteries, and a conventional current of 2.3 A runs through the wire, in the +x direction. Along 0.27 m of the length of the wire there is a magnetic... | <urn:uuid:cd84d5f4-05b4-4f62-8e72-9994ec1df141> | 3.5 | 284 | Q&A Forum | Science & Tech. | 69.062983 | 4,158 |
All eyes will be on the new Mars rover Curiosity when it lands in just over two weeks, but lest we forget, NASA’s indefatigable Mars rover Opportunity is still rolling along, too. The rover has driven about 22 miles, which prompted some Olympic-minded NASA people to realize the rover is nearing marathon distance. It wi... | <urn:uuid:91199055-8c30-4720-9c1c-6196d220347a> | 2.9375 | 483 | Truncated | Science & Tech. | 46.493967 | 4,159 |
In December 1992, Toutatis made a close approach to Earth. At the time, it was an average of about 4 million kilometers (2.5 million miles) from Earth. Images of Toutatis were acquired using radar carried out at the Goldstone Deep Space Communications Complex in California's Mojave desert. For most of the work, a 400,0... | <urn:uuid:5e6b2814-db1f-46bc-9374-445f6d3a9edb> | 3.78125 | 1,623 | Knowledge Article | Science & Tech. | 48.064005 | 4,160 |
Studying the effects of rainfall on civet behaviour
Itís pretty easy to get lost when you venture deep into the Jungle of Lambusango on the Isle of Buton, just off the South East coast of Sulawesi in Indonesia - a fact that I discovered more than once and to the amusement of the local guides with whom I worked during m... | <urn:uuid:66c46207-2104-41e9-ae66-4642f6fa70a1> | 3.03125 | 2,298 | Personal Blog | Science & Tech. | 34.609654 | 4,161 |
The moon has never had all that much. It doesn't have atmosphere, it doesn't have water and it sure doesn't have life. What it does have, though, is dirt lots and lots of dirt and it's some of the coolest stuff you ever saw. Now it's even cooler, thanks to the discovery this week of a wholly unexpected ingredient stirr... | <urn:uuid:65e71147-f739-4215-a0d7-44fdeb1cb89f> | 3.65625 | 1,063 | Nonfiction Writing | Science & Tech. | 48.625853 | 4,162 |
Science Nugget: Catching Solar Particles Infiltrating Earth's Atmosphere
Karen C. Fox
Science nuggets are a collection of early science results, new research techniques, and instrument updates that further our attempt to understand the sun and the dynamic space weather system that surrounds Earth.
On May 17, 2012 an M-... | <urn:uuid:230e9b6e-abec-4514-9538-49541b4bf201> | 3.578125 | 1,179 | Comment Section | Science & Tech. | 45.129838 | 4,163 |
BAZETTA - Locating and identifying various tree species and examining soil erosion were among the challenges local middle school students took part in as part of an annual outdoor environmental competition.
The Trumbull Soil and Water Conservation District hosted its 12th annual Junior Envirothon at Mosquito Lake State... | <urn:uuid:2fa49a98-6868-44d8-923c-7ae2bf0eae31> | 2.8125 | 522 | News Article | Science & Tech. | 38.69392 | 4,164 |
An elevator from Earth to space may look something like this.
Click on image for full size
Courtesy of NASA
Elevator to Space!
News story originally written on October 15, 2000
Would you like to take an elevator to space? Scientists are working on one!
A really long cable will stretch from Earth to space. But don't get... | <urn:uuid:ef8e1562-50a9-4d13-8ee0-06c887976497> | 3.0625 | 511 | Content Listing | Science & Tech. | 68.467223 | 4,165 |
A record year for eagles on the James| March 7, 2011
The bald eagle breeding population along the James River has set a new record, with 165 breeding pairs of the birds documented in early March.
That number, likely to increase, has surpassed the 154 breeding pairs spotted last year on the James River. The figures were... | <urn:uuid:bcd8b2af-1dec-44b7-a93e-374964b1a0ad> | 2.953125 | 652 | News (Org.) | Science & Tech. | 53.96441 | 4,166 |
(Note: If you're already familiar with chemical potentials, you may be interested in this alternative thermodynamic explanation.)
Two things happen when ice and water are placed in contact:
Molecules on the surface of the ice escape into the water
molecules of water are captured on the surface of the ice (freezing).
Wh... | <urn:uuid:82456d7a-489d-4b94-8475-0c74c32781b4> | 3.984375 | 964 | Tutorial | Science & Tech. | 45.151474 | 4,167 |
An Ancient Universe: How Astronomers Know the Vast Scale of Cosmic Time
THE ANCIENT UNIVERSE
b) The Age of the Oldest Stars
Other stars may have different lifetimes. Stars smaller (less massive) than the Sun have longer lives because they fuse their hydrogen fuel so much more slowly. Similarly, a sub-compact car may ha... | <urn:uuid:15e8cc19-578b-4f33-b726-1bf680aec84b> | 3.75 | 433 | Knowledge Article | Science & Tech. | 41.11164 | 4,168 |
This September, Larry Crumpler, a research colleague at the New Mexico Museum of Natural History and Science, and I were able to fly in the back seats of two weight-shifting ultralight aircraft during a two-hour flight over the McCartys lava flow in central New Mexico. This flow is 3,000 years old and over 47 km (29 mi... | <urn:uuid:4e7f5492-bac5-458d-b994-b06c56311a08> | 2.703125 | 508 | Personal Blog | Science & Tech. | 32.178526 | 4,169 |
An interesting recent paper from Dr. Son Nghiem at NASA’s Jet Propulsion Laboratory and colleagues finds that the bottom of the Arctic Ocean controls the pattern of sea ice thousands of feet above on the water’s surface. The seafloor topography exerts its control not only locally, in the Bering, Chukchi, Beaufort, Bare... | <urn:uuid:0e0b2631-c82b-4836-92f8-82d18b02bcf8> | 3.765625 | 445 | News (Org.) | Science & Tech. | 53.662841 | 4,170 |
Carbon dioxide may have acted as Earth’s ‘thermostat’ since earliest timesBy Steve Koppes
A greenhouse gas that has become the bane of modern society may have saved Earth from completely freezing over early in the planet’s history, according to the first detailed laboratory analysis of the world’s oldest sedimentary ro... | <urn:uuid:1069f644-2f39-41e7-8a41-da6f46207caf> | 3.921875 | 1,166 | News Article | Science & Tech. | 35.564107 | 4,171 |
Conservation storytelling from science to IPBES
"Science and stories are not the same thing, although stories have long been the outward face of conservation science. With the launch of IPBES we are going to have to more carefully and strategically untangle our stories from our science," writes IUCN experts in the rece... | <urn:uuid:b7694160-880e-429c-a270-a8068fcd53e1> | 2.828125 | 330 | News (Org.) | Science & Tech. | 39.362731 | 4,172 |
Continuous flow - A method of analysis where sample material is moved through a series of conversion and purification steps within a continuously flowing stream of carrier gas, typically helium. In most cases, this method allows for a single measurement of a sample.
Continuous flow interface - The carrier gas flow rate... | <urn:uuid:c3b8a093-8f35-40ec-ada6-88dec392b4ac> | 3.359375 | 495 | Knowledge Article | Science & Tech. | 28.445605 | 4,173 |
String objects have one unique built-in operation: the % operator (modulo) with a string left argument interprets this string as a C sprintf() format string to be applied to the right argument, and returns the string resulting from this formatting operation.
The right argument should be a tuple with one item for each a... | <urn:uuid:31b05556-69da-49a6-8e6d-41a9e851a9e1> | 4.28125 | 419 | Documentation | Software Dev. | 56.076853 | 4,174 |
Prepared by the Ecologically Sustainable Development Steering Committee
Endorsed by the Council of Australian Governments
ISBN 0 644 27253 8
Part 3 Intersectoral Issues - Chapter 9
To protect biological diversity and maintain ecological processes and systems.
This can best be done by improving the level of coordination... | <urn:uuid:45b0be48-28d8-44c2-a3d3-6156762d8163> | 3.296875 | 371 | Knowledge Article | Science & Tech. | -79.975848 | 4,175 |
ANSI Common Lisp 6 Iteration 6.1 The LOOP Facility 6.1.1 Overview of the Loop Facility
188.8.131.52 DestructuringThe d-type-spec argument is used for destructuring. If the d-type-spec argument consists solely of the type fixnum, float, t, or nil, the of-type keyword is optional. The of-type construct is optional in the... | <urn:uuid:8c47a974-6b7a-41bd-83c9-78f5df9ee4f2> | 2.65625 | 974 | Documentation | Software Dev. | 96.710971 | 4,176 |
During the Cold War, it wasn't hard to determine who could have been behind an airborne nuclear strike—just check behind the Iron Curtain. But in the modern era of nuclear proliferation, figuring out who set off a bomb would be more akin to crime scene investigation.
Say a nuclear missile is launched somewhere in the w... | <urn:uuid:7a26ff58-d863-451a-b0c1-ba0a65bb5859> | 3.3125 | 470 | News Article | Science & Tech. | 44.598869 | 4,177 |
This is a book report Rachel wrote for Ms Moore’s 3rd grade class this year.
Marie Curie changed the world through science. Marie and her husband discovered two new elements, polonium and radium. Marie and two other scientists won the Nobel Prize in physics. In 1910, she isolated radium in the form of a metal. Marie wo... | <urn:uuid:c74b54f3-6918-4b20-b1c8-5c78fbe4c75a> | 3.84375 | 245 | Personal Blog | Science & Tech. | 55.61318 | 4,178 |
Lifeboat Foundation ParticleAcceleratorShield
By the Lifeboat Foundation Scientific Advisory Board. This is an ongoing program so you may submit suggestions to email@example.com.
OverviewOur goal is to prevent, and also make plans on surviving when possible, particle accelerator mishaps including quantum vacuum collaps... | <urn:uuid:0db295e6-9cfd-4d72-9cb6-2ea653061d12> | 3.375 | 756 | Content Listing | Science & Tech. | 34.372446 | 4,179 |
Most functional programming languages like Haskell or ML allow to define functions using pattern matching. Instead of testing arguments in the body of a message, this allows to specify case-based function definitions in a very elegant way. An example of such a definition would be the factorial:
fac(0) = 1
fac(n) = n * ... | <urn:uuid:dbc036a0-3770-4bc9-9465-6c657afaec87> | 3.125 | 322 | Product Page | Software Dev. | 38.486487 | 4,180 |
Explaining Bayes' Theorem
Date: 03/22/99 at 15:02:47 From: Kevin Battisfore Subject: Bayes' Theorem I need an easy to understand explanation of Bayes' Theorem to begin my math project for the math fair. What I want to illustrate is similar to the Monty Hall problem in that the subject chooses one door, is shown a secon... | <urn:uuid:9293eec9-c202-4999-b08c-7a3250c46b18> | 3.578125 | 479 | Comment Section | Science & Tech. | 85.166262 | 4,181 |
Find the length of the curve
Any help would be greatly appreciated!
Thanks in advance!
Why is there only an absolute value only on the denominator?
Edit: I see the top will automatically get rid of the negative. I'm guessing I'll need to involve limits for this. I'll do it and say what happened.
Ok so I did it and got ... | <urn:uuid:7c75c1d8-5c74-43d5-97f0-0b56cbbfe6bf> | 2.609375 | 216 | Comment Section | Science & Tech. | 79.922861 | 4,182 |
Many independent lines of scientific evidence show that the Earth and Universe are billions of years old. Current measurements yield an age of about 4.6 billion years for the Earth and about 14 billion years for the Universe.
How ages are measured
The age of the Earth is measured by studies of radioactive elements. Rad... | <urn:uuid:444bd116-0417-4ee7-84df-4e8bf6a67273> | 4.09375 | 1,184 | Knowledge Article | Science & Tech. | 33.942724 | 4,183 |
While new data gathered this summer have not yet been thoroughly analyzed, a few surprises have already emerged. In Yosemite Valley, the formerly most abundant species of shrew has been supplanted by a species previously known only from higher elevations in the park. And, while looking at mammals in the northwest corne... | <urn:uuid:be55dbfa-e52b-4930-baf2-34535b6e30c5> | 3.09375 | 339 | News Article | Science & Tech. | 37.108502 | 4,184 |
As the ocean warms, it expands, and that thermal expansion is the prime contributor to changes in global sea levels, which in recent years have been rising by an average of about 3 mm a year. (Regionally and locally, changes may be greater or lower, affected not only by thermal expansion but factors ranging from local ... | <urn:uuid:d325aeac-ee7b-4eb1-8c35-1a1777f00e3a> | 3.953125 | 372 | News Article | Science & Tech. | 42.070785 | 4,185 |
The explosion and collapse of a star 40 times as massive as the sun should easily create a black hole. So astronomers are scratching their heads this week as new data from NASA's Chandra X-ray Observatory indicate that such an event formed only a neutron star. "It's a surprising find," says Gertjan Savonije of the Univ... | <urn:uuid:56ed69ff-2822-4822-a7f8-55c459571110> | 3.984375 | 449 | News Article | Science & Tech. | 45.785588 | 4,186 |
Before I answer your questions let me first start to say that there are two major classes of computing languages:
- Regular languages: Most log files follow this format. Each line is a full expression, and can be parsed separately. Essentially, all your needs can be met by just a lexer or regular expressions.
- Syntact... | <urn:uuid:2f92efb1-ee8c-43fe-aee8-f685376beca0> | 2.5625 | 423 | Q&A Forum | Software Dev. | 60.607695 | 4,187 |
Managing plant populations in fragmented landscapes: restoration or gardening? (Review)
Hobbs, R.J. (2007) Managing plant populations in fragmented landscapes: restoration or gardening? (Review). Australian Journal of Botany, 55 (3). pp. 371-374.
*Subscription may be required
Ecosystem fragmentation results in major ch... | <urn:uuid:37a8a71b-57e4-4949-8e94-e124f671a671> | 2.90625 | 331 | Academic Writing | Science & Tech. | 22.538507 | 4,188 |
UPDATE 11/2: At the Washington Post @bradplumer follows up this post with his own, providing a nice summary of the issue. He concludes: "aggressive steps to cut emissions could reduce the amount of sea-level rise by somewhere between 6 and 20 inches in 2100, compared with our current trajectory" -- which is just about ... | <urn:uuid:a1167fc8-3d7d-43c0-a9c9-a15c1abc67d7> | 2.90625 | 553 | Personal Blog | Science & Tech. | 42.633912 | 4,189 |
Guy Demmert got quite a surprise when he hauled a fishing net into his boat off the coast of southeast Alaska in July 2002. There among the salmon, in living black and white, was a Humboldt penguin, thousands of miles from where any of its kind should have been.
The flightless bird appeared to be healthy and in good co... | <urn:uuid:9b520316-6472-454c-a832-1ddfedeaf944> | 3.640625 | 999 | News Article | Science & Tech. | 49.436716 | 4,190 |
|Spend the time||outdoors|
Tree Tracker participants will take part in an exciting training session and then visit specific trees in their neighborhoods to observe and record the life cycle changes in trees. This information can then be used to learn more about changes in climate. Participants upload their observations... | <urn:uuid:b65e4bdd-8d3e-45bb-9c5c-20b2d58159d5> | 2.90625 | 154 | News (Org.) | Science & Tech. | 45.006667 | 4,191 |
I know I’ve been doing a lot of theory here for a while, but just hold on a little longer, it’s about to pay off.
A subgroup is sort of like a slice through a group. The cosets of a subgroup are like slices “parallel” to the group. We know that passes through the identity of already, so we want to find a “parallel copy... | <urn:uuid:14a9cf82-17f5-4d6a-8572-d4e9e68dcea3> | 3.40625 | 853 | Personal Blog | Science & Tech. | 70.214484 | 4,192 |
The development of steam engines during the industrial revolution went hand-in-hand with formulation of one of the most powerful laws of physics. The second law of thermodynamics provides insight into everything from the workings of refrigeration systems and such oddities as black holes to why time only runs forward.
T... | <urn:uuid:cd75394c-34ad-4eb5-b1f3-debe1a50ce26> | 3.59375 | 1,310 | Nonfiction Writing | Science & Tech. | 38.212406 | 4,193 |
Authors: Charles B. Leffert
ABSTRACT The success of quantum theory shows that the Universe is much more complicated than most have supposed. How did our universe get started? What is energy? What is gravity? The late Richard Feynman in Volume 1 of his “Lectures on Physics” said that no one had come up with the machiner... | <urn:uuid:3b92e652-494c-460a-ba14-d21992da079a> | 2.984375 | 444 | Academic Writing | Science & Tech. | 36.4175 | 4,194 |
With the DOM, you can access every node in an XML document.
Access a node using its index number in a node list
This example uses the getElementsByTagname() method to get the third <title> element in "books.xml"
Loop through nodes using the length property
This example uses the length property to loop through all <titl... | <urn:uuid:3c8fb642-cdb0-4f9c-957a-8609040f31f1> | 3.46875 | 508 | Documentation | Software Dev. | 50.985484 | 4,195 |
The most used definition of electronegativity is that an element's electronegativity is the power of an atom when in a molecule to attract electron density to itself. The electronegativity depends upon a number of factors and in particuler as the other atoms in the molecule. The first scale of electronegativity was dev... | <urn:uuid:9b47acc3-a1ff-4811-98d9-c53686607c66> | 3.90625 | 248 | Knowledge Article | Science & Tech. | 39.439734 | 4,196 |
Science Fair Project Encyclopedia
Pleocyemata is a sub-order of decapod crustaceans, erected by Martin Burkenroad in 1963. Burkenroad's classification replaced the earlier sub-orders of Natantia and Reptantia with the monophyletic groups Dendrobranchiata (prawns) and Pleocyemata. Pleocyemata contains all the members of... | <urn:uuid:132685e8-cf44-452f-9d2c-e2f2208b7e97> | 3.40625 | 290 | Knowledge Article | Science & Tech. | 44.707991 | 4,197 |
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Man, volcanoes and the Sun have influenced Europe's climate over recent centuries
19 January 2011
An International research team has discovered that seasonal temperatures in Europe, above all in winter, have been affected over the past 500 years by natural factors such as volcanic eruptions and... | <urn:uuid:ed8c068a-c5f0-47c1-bd0b-ccbc41c47fa9> | 3.703125 | 542 | News Article | Science & Tech. | 11.649851 | 4,198 |
An Exact Value for Avogadro's Number
Untangling this constant from Le Gran K could provide a new definition of the gram
Avogadro's number, N A , is the fundamental physical constant that links the macroscopic physical world of objects that we can see and feel with the submicroscopic, invisible world of atoms. In theory... | <urn:uuid:d60dadaa-806d-47c7-af7c-f527d78fbb9f> | 3.3125 | 587 | Nonfiction Writing | Science & Tech. | 40.93847 | 4,199 |