text large_stringlengths 148 17k | id large_stringlengths 47 47 | score float64 2.69 5.31 | tokens int64 36 7.79k | format large_stringclasses 13
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Sigma and Pi Bonds
There are two types of covalent bonds: sigma (σ) and pi (π) bonds. Sigma bonds occur when s orbitals, p orbitals pointing along the axis to the other bonding atom, or hybridized orbitals collide and overlap; the region of maximum electron density is between the two bonded atoms and lies along the axi... | <urn:uuid:02a3e6d7-3f24-470c-ad8d-4cdc67fa3575> | 3.953125 | 296 | Knowledge Article | Science & Tech. | 45.315709 |
For Louisiana in particular, a key area of concern is coastal marshes. They are the breeding ground as well as home base for a wide range of marine life vital to the region’s fishing industries. Moreover, the wetlands provide a first barrier against storm surges from hurricanes.
But southern Louisiana’s wetlands alread... | <urn:uuid:764191f7-a689-4052-81da-3197bfae2cf5> | 3.4375 | 298 | Truncated | Science & Tech. | 51.302701 |
Mangroves are a collection of salt-tolerant evergreen trees that live in tropical and sub-tropical coastal environments and line approximately 8% of the world’s coastlines. They are unique because they occupy both land and water and are sometimes referred to as ‘floating forests’. This unique aspect of mangroves that e... | <urn:uuid:db34d4e1-59f6-4b2d-b090-f953a518ca44> | 4.03125 | 1,549 | Knowledge Article | Science & Tech. | 25.531877 |
Major Section: HISTORY
The keyword command
:oops will undo the most recent
which we here consider just another
ubt). A second
:oops will undo
the next most recent
ubt, a third will undo the
ubt before that
one, and a fourth
:oops will return the logical world to its
configuration before the first
Consider the logical w... | <urn:uuid:baf99a76-a5a2-42e9-bbdc-f947de83e08f> | 2.71875 | 771 | Documentation | Software Dev. | 54.495852 |
This is an interesting piece, based on new research just published in Nature, which shows the world is more sensitive to CO2 than it has been in about, say, 12-15 million years or so. Here’s the full repost from Skeptical Science:
Today's Climate More Sensitive to Carbon Dioxide Than in Past 12 Million Years (via Skept... | <urn:uuid:fd14572f-c049-44f4-887c-7a5683cc74e6> | 2.875 | 282 | Personal Blog | Science & Tech. | 42.900572 |
It turns out that the elliptical orbit of the Earth has little effect on the seasons. Instead, it is the 23.45-degree tilt of the planet's rotational axis that causes us to have winter and summer.
The diagram below demonstrates what happens.
In this diagram, you can see the axis of rotation and the equator. The Norther... | <urn:uuid:411686be-2577-48bb-84a6-d235f39d5d99> | 4.15625 | 216 | Knowledge Article | Science & Tech. | 55.127821 |
Modern Spectral Climate Patterns in Rhythmically Deposited Argillites of the Gowganda Formation (Early Proterozoic), Southern Ontario, Canada
NOTE: At the time of publication, the author Gary Hughes was not yet affiliated with Cal Poly.
Rhythmically deposited argillites of the Gowganda Formation (ca. 2.0–2.5 Ga) probab... | <urn:uuid:321d003c-303f-41a9-ade3-1bc57754b02a> | 2.9375 | 486 | Academic Writing | Science & Tech. | 24.77177 |
If one needs a source of energy that is not exhaustible and self
sustaining perhaps earth energy/neg energy fits the bill. The size of
the collector plates would be relitive to the current.
but we have to get the static magnetic
> field to become
> oscillatory. If you can make a magnetic field from a permenate
> magnet... | <urn:uuid:23097d80-f36f-471a-8ac2-f2d3347f76e8> | 2.796875 | 544 | Comment Section | Science & Tech. | 57.47588 |
Whale song is the sound made by whales to communicate.
The word "song" is used in particular to describe the pattern of regular and predictable sounds made by some species of whales (notably the humpback) in a way that is reminiscent of human singing.
For more information about the topic Whale song, read the full artic... | <urn:uuid:f91eab16-b534-4d9d-949b-ba6a32d52599> | 3.046875 | 103 | Knowledge Article | Science & Tech. | 32.324388 |
Do you like your strawberry jelly with or without the seeds? Are you glad to have a seed-free watermelon, or do you enjoy spitting the seeds into the garden? You might not like finding seeds in your fruit, but fruit is a plant's tool for dispersing seeds to create offspring. In this activity you will investigate how ma... | <urn:uuid:58b0aa6e-5def-4c9f-8506-c19bf7de821a> | 3.765625 | 990 | Tutorial | Science & Tech. | 60.999412 |
Researchers from UTA and UNAM appear on a local television program in the state of Coahuila to discuss their investigations of Mexican amphibians, reptiles, and parasites in August of 2007.
Herpetology of Mexico is a preliminary attempt to characterize the vast amphibian and reptile diversity of Mexico. The majority of... | <urn:uuid:49fd072d-8b2a-478c-bebd-1c4682e519dc> | 3.1875 | 480 | Knowledge Article | Science & Tech. | 21.039852 |
I know someone who bought earphones that shine light in you ears. According to what he was told, there are neurons that sense light and then make you feel wide awake when activated, which seemed like snake oil to me. Apparently the pineal gland may be able to sense light and it does secrete melatonin - a sleep regulati... | <urn:uuid:c8710e56-de85-4d74-87f8-82ed5e0a91af> | 3.203125 | 732 | Q&A Forum | Science & Tech. | 47.79 |
This week's highlight taxon is the Musophagidae, a uniquely African family of birds that contains the turacos (or should that be "turacoes"?), also spelt "touracos". Turacos are about 20 species of medium-sized frugivorous (fruit-eating) birds. The name of the type genus, Musophaga, means "plantain eater", which is als... | <urn:uuid:d8769021-6421-4589-b290-07107a1160d1> | 4.0625 | 1,281 | Knowledge Article | Science & Tech. | 49.17533 |
Dingemans, B.J.J. and Bakker, E.S. and Bodelier, P.L.E. (2011) Aquatic herbivores facilitate the emission of methane from wetlands. Ecology, 92, 1166-1173. ISSN 0012-9658.
|PDF - Published Version |
Restricted to KNAW only
Official URL: http://dx.doi.org/10.1890/10-1297.1
Wetlands are significant sources of atmospheric... | <urn:uuid:16cd5714-60f1-42dc-9ae5-2f453f328018> | 2.875 | 358 | Academic Writing | Science & Tech. | 39.585106 |
It was like something out of a science fiction film. Scientists shot a rocket toward where Mars would be in several months. On that rocket was a capsule containing a 1-ton (0.9-metric-ton) rover. The capsule detached from the rocket and made its way to the upper atmosphere of Mars. Then the really crazy stuff happened.... | <urn:uuid:163aca14-ab65-459c-b567-02c9f9292344> | 3.671875 | 346 | Listicle | Science & Tech. | 49.846849 |
Wednesday, May 16, 2012 - 07:30 in Paleontology & Archaeology
As history has repeatedly shown, where there are valuable minerals to be unearthed, adventurous humans will arrive in droves even if it means battling extreme conditions and risking life and limb.
- More gold -- and other minerals -- in them thar hills?Tue, ... | <urn:uuid:4b755518-2d87-4a37-bf3e-85d0a17248b4> | 3.1875 | 167 | Content Listing | Science & Tech. | 34.191925 |
§ Mr. Morley
Annual monitoring for evidence of Lindane in the area of the English Channel where MV Perintis sunk was undertaken between 1989 and 1993. This found that Lindane concentrations in seawater were low. The conclusion was that the English Channel had not been contaminated as a result of the sinking and that th... | <urn:uuid:ec3136f9-44f2-41cc-a08e-9979f9e870d0> | 2.953125 | 177 | Knowledge Article | Science & Tech. | 31.475952 |
No one has observed any evidence for proton decay. That might be disappointing professionally for physicists, but it's good news for the universe. If it turns out to be possible, proton decay could be the beginning of the end of everything. Here's why.
How do we start with protons and end with the end of the universe? ... | <urn:uuid:31d796eb-2b06-4cb8-9225-43ad78c988ea> | 4.03125 | 1,150 | Nonfiction Writing | Science & Tech. | 52.138176 |
“Hydrothermal vents are home to animals found nowhere else on the planet that get their energy not from the Sun but from breaking down chemicals, such as hydrogen sulphide,” said Professor Alex Rogers of Oxford University’s Department of Zoology, who led the research. “The first survey of these particular vents, in the... | <urn:uuid:42806314-c953-4440-bfbb-56b9bf4d91a0> | 3.78125 | 209 | Truncated | Science & Tech. | 37.212 |
Has extreme weather increased in recent years? The science is still unsettled on whether climate change has resulted in more intense hurricanes, so let's restrict our attention to tornadoes and heavy rain. There is evidence that global warming has caused an increase in very heavy precipitation events--the kind most res... | <urn:uuid:05b4270b-6b42-49ca-84ab-7212b4e2aecb> | 3.59375 | 3,397 | Knowledge Article | Science & Tech. | 61.549723 |
Census of Marine Life: Wild and Wonderful Creatures
The Census of Marine Life - a ten-year effort by scientists from around the world to answer the age-old question, “What lives in the sea?” It was an international effort to asses the diversity, distribution, and abundance of marine life that lives in our ocean, and th... | <urn:uuid:2ebfa9f1-a969-412f-ab7d-d0f436c5ab6a> | 3.515625 | 173 | Truncated | Science & Tech. | 29.553 |
The Hubble Space Telescope is only 17 years old, but already, it has turned in a series of great discoveries and images.
On its birthday, Hubble's handlers have released 48 images of the Carina Nebula as new stars are being born. Carina is estimated to be 7,500 light years away. These images include data from a fixed e... | <urn:uuid:045047ac-3463-493c-a760-e34dc9f5ea2c> | 2.75 | 122 | Truncated | Science & Tech. | 45.958412 |
- About Us
- SW Climate
Published March 24, 2011
Southwest Snowpack(updated 3/17/11)
Data Source(s): National Water and Climate Center, Western Regional Climate Center
Snowpack levels continued to drop over the past month as very little precipitation fell across most of Arizona and New Mexico. The current La Niña event... | <urn:uuid:847ca877-abf2-4062-92d1-d314028a63a3> | 2.6875 | 752 | Knowledge Article | Science & Tech. | 31.774047 |
The DODís vessels ORV Sagar Kanya and FORV Sagar Sampada were deployed for studying the impact of tsunami on the ocean environment and its resources in the Bay of Bengal and Arabian Sea during January Ė February 2005.
Immediately after the tsunami, the vessel PRV Sagar Kanya sailed from Goa on 3rd January 2005 with sci... | <urn:uuid:2708dc55-664e-4510-87ed-172a923d4cfb> | 2.75 | 371 | Comment Section | Science & Tech. | 29.875682 |
More evidence that Darwin's theory of natural selection as the origin of new species is wrong
From Jane Harris-Zsovan's recent story at Design of Life blog:
Darwin's theory of natural selection requires offspring to diverge from a common ancestor to create new species. It requires genetic differences to increase as des... | <urn:uuid:5e6c946c-1fcf-477e-81a4-bb5b57182879> | 3.078125 | 246 | Personal Blog | Science & Tech. | 46.523864 |
[If you cannot see the You Tube video below, you can click here for a high quality mp4 video.]
Interviewees: Richard Prum & Jakob Vinther, Yale University
by Caroline Parnass
Yale University graduate student Jakob Vinther was studying a fossil squid from the late Jurassic period, about 150 million years ago. Looking at... | <urn:uuid:95fb1396-eae7-43d5-b2c9-5a9e92b2ffa3> | 3.765625 | 1,182 | Truncated | Science & Tech. | 39.878313 |
Washington: There are more than 210,000 known life forms in the world's oceans, but this could be a fraction of the total number of marine species, according to early results from a marine census released today.
Scientists from around the world are expected to complete the census of the world's oceans by 2010, when the... | <urn:uuid:741707bf-6ded-4a9c-9600-0f1e17a3b909> | 3.203125 | 696 | Truncated | Science & Tech. | 51.93083 |
Duroquinone Molecule Nano-Brain
A nano-brain consisting of a hexagonal duroquinone molecule can carry out 16 times more operations than a normal computer transistor. All in a package hundreds of times smaller than the wavelength of visible light. This molecule resembles a hexagonal plate with four cones linked to it, "... | <urn:uuid:44632b1b-974a-42d1-9491-67026ed469cc> | 3.453125 | 1,320 | Comment Section | Science & Tech. | 50.377222 |
variable = rand() % max;
rand() produces a random integer value.
% is called the modulus operator. It's basically what you learned to be the remainder in division. Ie. 5 % 3 = 2 and 16 % 5 = 1
As for this function, it actually only returns a number from 0 to max - 1, as you can't divide a number by a number and have th... | <urn:uuid:8b58daaf-7acb-4541-a7f3-fd73fefd7775> | 3.015625 | 102 | Q&A Forum | Software Dev. | 79.200685 |
THE FORMATION OF THE MOON: The Earth's moon formed just 30 to 50 million years after the sun was formed, when an object the size of Mars collided with Earth, releasing a giant cloud of dust along with the moon. Using a spectrograph on the Spitzer Space Telescope researchers identified the chemical make up of the dust a... | <urn:uuid:ea437fb1-2eae-4e47-a6b9-dcaff9710b47> | 4.34375 | 267 | Knowledge Article | Science & Tech. | 43.913907 |
View Full Version : moving earth with comet/asteroids
2001-Nov-25, 04:01 AM
I ran across a small newspaper article a month or so ago about the possibility of moving Earth into a larger/different orbit by managing the paths of comets or asteroids. Does anyone know the whereabouts of that actual article, or other sources... | <urn:uuid:a610276a-a7d8-4793-bb46-bca7d262851c> | 3.1875 | 462 | Comment Section | Science & Tech. | 81.837726 |
An ejecta blanket is a generally symmetrical apron of ejecta that surrounds a crater; it is layered thickly at the crater’s rim and thin to discontinuous at the blanket’s outer edge.
structure of impact craters, showing surrounding ejecta
After an impact event, the falling debris forms an ejecta blanket surrounding th... | <urn:uuid:bc6f9cce-16d8-484f-ac0e-43c16a2e1550> | 3 | 268 | Knowledge Article | Science & Tech. | 42.061225 |
How do you explain a scientific breakthrough in a soundbite, let alone the creation of the universe? That must be the daily problem faced by the PR flak at CERN, the Geneva-based European Nuclear Research Facility. Scientists investigating the creation of the universe hit the front pages this week with a new discovery;... | <urn:uuid:08237e82-7116-45eb-bb28-0776094e8c27> | 2.734375 | 456 | Personal Blog | Science & Tech. | 54.710618 |
Lightningfollows the Sun
Space Science News home
Lightning follows the Sun Space imaging team discovers unexpected
One of a series of stories covering the quadrennial International Conference on Atmospheric Electricity, June 7-11, 1999, in Guntersville, Ala.
"We've been watching the global distribution and established ... | <urn:uuid:83d2a98d-f3a8-4afd-bd65-8eeff7496a29> | 3.234375 | 1,373 | Content Listing | Science & Tech. | 42.82194 |
The Hottest Planet Venus is a dim world of intense heat and volcanic activity. Similar in structure and size to Earth, Venus' thick, toxic atmosphere traps heat in a runaway 'greenhouse effect.' The scorched world has temperatures hot enough to melt lead. Glimpses below the clouds reveal volcanoes and deformed mountain... | <urn:uuid:3b3b065c-1559-4d5f-bcc3-09abd59bbfe4> | 3.046875 | 78 | Knowledge Article | Science & Tech. | 44.668393 |
Chel Anderson is a botanist and plant ecologist for the Minnesota Department of Natural Resources. She lives here in Cook County and joins us periodically to talk about phenology or what’s going on in the woods right now. Welcome, Chel.
Well, Chel, we had one big storm. Let’s talk about storm damage.
Anderson: Yeah, th... | <urn:uuid:b28a5128-c413-49d7-bbd3-87a7dcc2cf15> | 3.046875 | 1,552 | Audio Transcript | Science & Tech. | 55.565876 |
This tutorial assumes that you know the basics behind binary code, bits, and bit-wise operators. You don't need to know what every operator does by heart, but you should understand the fundamentals of bit-wise manipulation and have the ability to look up anything you don't know. If you need to learn these things or jus... | <urn:uuid:3d9a49e3-4479-41aa-ad7f-8237a47e5384> | 3.875 | 859 | Comment Section | Software Dev. | 68.293721 |
Search this site
Java programming tutorial for beginners
The aim of this and the following pages is to teach you how to program Java, assuming you've done little or no programming in the past. Before you proceed with this tutorial, you should probably read through the guide to getting started with Java: that guide will... | <urn:uuid:9c16416a-0c87-4b1d-bf89-55eba71c3f00> | 3.109375 | 293 | Tutorial | Software Dev. | 49.689479 |
What exactly creates high and low pressure...and is there a tendency for one to be found more frequently during certain times of the year?
High pressure is generated by sinking air, low pressure by rising air. They can be generated on a very small scale by air rising from heated pavement (you see hawks soaring in these... | <urn:uuid:c5fb6c98-3f5c-45c6-bda9-6c5ae06cfbe5> | 3.828125 | 232 | Knowledge Article | Science & Tech. | 57.904567 |
THERE was no splash, just a flash of red as the body plunged into the pool and disappeared. At first, Simon Pollard thought his eyes were playing tricks on him. Spiders don't commit suicide, yet this one - a small red crab spider about a centimetre across - seemed to have thrown itself into the mouth of a carnivorous p... | <urn:uuid:208bf5f8-bc3c-4d82-aa22-0ef163c8319c> | 3.3125 | 212 | Truncated | Science & Tech. | 58.882429 |
So the shrinking Arctic ice will make it easier for us to tap the Arctic's oil and gas reserves (21 January, p 24). That's oil and gas that we will burn, producing carbon dioxide that will cause the ice cap to shrink even further. Since less polar ice means less sunlight is reflected from the Earth's surface, and hence... | <urn:uuid:49ed897d-29ad-44a3-b0f7-fc24f6261aaf> | 3.40625 | 127 | Truncated | Science & Tech. | 57.72777 |
For undocumented functions, this is a particular oddity. For me, this function has so far returned only two values for any particular image: 1 and 8. And, after experimenting with it about forty or fifty times, I think I understand how it works, based simply on my experience.
The value returned is the number of bits us... | <urn:uuid:5e4b572a-41ae-4fc4-add0-c531a0675d0e> | 2.734375 | 916 | Documentation | Software Dev. | 59.784694 |
This is the local valid time for which the observation was taken. There may be some ambiguity around the times when Iowa changes from CDT->CST and vice-versa.
This value is simply the temperature of the air. Values are in units of degrees fahrenheit.
Wind Direction can sometimes be a hard concept to interpret. The
valu... | <urn:uuid:e238b4f5-e271-4136-94f8-e569bc3b0c01> | 2.9375 | 285 | Structured Data | Science & Tech. | 64.215375 |
are in Italics
Fish & Wildlife Mgmt.
Model Design & Building
Pulp and Paper
Reptile & Amphibian Study
Small Boat Sailing
Soil & Water
- Tell the meaning of the following: alpha particle, atom, background radiation, beta
particle, curie, fallout, half-life, ionization, isotope, neutron, neutron activation,
nuclear energ... | <urn:uuid:48337d88-445d-4d63-ba9f-f08f76f387cf> | 3.875 | 768 | Tutorial | Science & Tech. | 55.195631 |
How big is the shuttle?
- The shuttle measures 122.2 feet long, 56.67 feet high, with wingspan of 78.06 feet. The height of the full shuttle stack, including the external fuel tank, is 184.2 feet. Gross weight is 4.5 million pounds at liftoff. That’s almost four times as weighty as the heaviest airplane ever built, the... | <urn:uuid:f602eade-7a06-4345-be25-4f88277d21a1> | 3 | 500 | Listicle | Science & Tech. | 78.427772 |
Trapping education manual for the beginning or inexperienced trapper intended to provide information on North Dakota's predators and furbearing animals and the basics on how to trap them using good trapping skills and sound fur management.
Links by map location or station number to real-time stage and streamflow, real-... | <urn:uuid:39b74aa8-5189-4032-96a8-c7d68ca743cb> | 2.890625 | 280 | Content Listing | Science & Tech. | 32.994091 |
In 1998, Oceanographer John Martin (1935-1993) published an article demonstrating that increasing the concentration of iron in the surface waters of the Southern Ocean resulted in increased phytoplankton (i.e., microscopic plants such as diatoms) production. Like all plants, phytoplankton converts carbon dioxide (CO2) ... | <urn:uuid:84c48a86-8707-4bf8-b207-9ed85dc158bc> | 3.6875 | 297 | Personal Blog | Science & Tech. | 38.294 |
Date of this Version
Computers use algorithms to evaluate polynomials. This paper will study the efficiency of various algorithms for evaluating polynomials. We do this by counting the number of basic operations needed; since multiplication takes much more time to perform on a computer, we will count only multiplicatio... | <urn:uuid:22bbc919-f3cf-4b91-b60d-3f4e386fe327> | 4.1875 | 373 | Academic Writing | Science & Tech. | 47.793496 |
Quiz: What You Don’t Know About Wind Energy
Photograph by Pascal Rossignol, Reuters
You've seen those tall white turbines turning on hillsides or on windy plains, but how much do you know about the energy captured from wind?
As early as 200 B.C., wind power was used in China, and later, in Persia. How were the first wi... | <urn:uuid:44733185-9903-4b69-8441-adb9093b8d62> | 3.609375 | 1,338 | Q&A Forum | Science & Tech. | 57.730828 |
Our hypothesis is that ‘spatial and temporal variations in diversity and ecosystem function of the sea ice microbial community are sensitive indicators of changing climatic conditions’. The research will develop baseline long-term data on microbial biodiversity and community structure in the “grass” of ice-covered regi... | <urn:uuid:89ecedc4-dbc5-48c2-bf6b-392c2ae21db7> | 3.3125 | 555 | Academic Writing | Science & Tech. | 23.769209 |
Catalysts are compounds that accelerate chemical reaction but are not consumed in the reaction. They do this by providing an alternate reaction mechanism, lowering the activation energy of a reaction; as we showed in previous lessons, the activation energy of a reaction is closely related to its speed. It is very impor... | <urn:uuid:b143cef4-81a4-4c36-90e9-897cc912b82e> | 4.4375 | 722 | Knowledge Article | Science & Tech. | 24.262004 |
Author(s): D. R. Steward, P. Le Grand &E. A. Bernard
This manuscript presents an overview of the Analytic Element Method, and illustrates
how this mathematical technique is ideally suited to utilization within a
GIS geodatabase model.
The Analytic Element Method contains a set of analytic
elements that exactly satisfy ... | <urn:uuid:1435ebf9-da17-4443-8ea5-c9659c050589> | 3 | 444 | Academic Writing | Science & Tech. | 32.080031 |
A line of fixed length l moves so that its ends are on the coordinate axes. Determine the locus of P on this line which divides it in the ratio m:n. What is the locus if m=n?
Follow Math Help Forum on Facebook and Google+
Here are some hints.
First say that are the endpoints of the segment on the x-axis and on the y-ax... | <urn:uuid:4d47a22a-f185-44ae-8d94-4bf3d22b130a> | 3.71875 | 119 | Q&A Forum | Science & Tech. | 77.687238 |
What is KOH COMPOUND?
What is the ionic name for the compound KOH? Potassium Hydroxide What is the name of the compound KOH? KOH is Potassium Hydroxide What is the name of this compound KoH?
Best Answer: is this a serious thai travel forum question. ... "Potassium Hydroxide" if you're looking for an answer about chemis... | <urn:uuid:883e81f0-b658-4f59-b423-d6e683f05a2b> | 2.734375 | 2,524 | Q&A Forum | Science & Tech. | 62.841786 |
The encoding classes are primarily intended to convert between different encodings or code pages and a Unicode encoding. Encoding.Unicode (UTF-16) encoding is used internally by the .NET Framework, and Encoding.UTF8 encoding is often used for storing character data to ensure portability across machines and cultures.
Th... | <urn:uuid:b02f5d90-4d6d-49c7-8857-14cf6bf1a9c9> | 3.53125 | 309 | Documentation | Software Dev. | 23.340285 |
Giant Isopods for Valentine's Day
February 14, 2003
Tracey Smart, Master's Candidate
Oregon Institute of Marine Biology
University of Oregon
After three days of beautiful weather and calm seas, Valentine's Day dawned on the ship in the company of 3- to 4- ft swells, clouds, and wind. Unfortunately, this meant that the ... | <urn:uuid:3a31f382-9fdc-45de-bec2-16e1664cf4bc> | 2.84375 | 565 | Personal Blog | Science & Tech. | 44.746057 |
This is a question for which I've found it surprisingly hard to find a good answer. Biology texts talk mystically about the ATP->ADP reaction providing energy to power other reactions. I'd like to know some more details. Is this following roughly right ?
- Each reaction in a cell has a specific enzyme.
- Each enzyme ha... | <urn:uuid:43c30423-aaec-49a6-b0eb-2249d51a3cab> | 2.734375 | 300 | Q&A Forum | Science & Tech. | 47.956105 |
This chapter describes how to use the Science Collection and introduces its conventions.
The following code demonstrates the use of the Science Collection by plotting a histogram of 10,000 trials of rolling two dice.
#lang racket (require (planet williams/science/random-source)) (require (planet williams/science/discre... | <urn:uuid:dcd100b7-8460-4908-8ba1-bd9e87ff8b8f> | 3.4375 | 666 | Documentation | Software Dev. | 22.587218 |
Sci. STKE, 17 August 2004
PLANT BIOLOGY Identification of Stress-Regulated MicroRNAs
Small RNAs, either microRNAs (miRNAs) or short-interfering RNAs (siRNAs) are emerging as important regulators of gene expression. MicroRNAs (miRNAs) are short, single-stranded RNAs that inhibit gene expression by posttranscriptionally ... | <urn:uuid:560af384-235c-425b-ba2f-235bb4488d49> | 2.921875 | 428 | Academic Writing | Science & Tech. | 33.317194 |
This science fair project was performed to find out what conditions will make tablets dissolve faster. The experiment involved using Alka-Seltzer antacid tablets, water and hydrochloric acid at different temperatures.
The Alka-Seltzer antacid tablet will dissolve most quickly in a hydrochloric acid solution and at the ... | <urn:uuid:8d8c63ff-2be2-4b1c-8035-411894a286b0> | 3.734375 | 942 | Tutorial | Science & Tech. | 50.562702 |
|Chemical reactions triggered by ultraviolet (hv) in the thin martian atmosphere.
Credit: Sushil, UMich
Six years ago, then NASA Associate Administrator Wesley Huntress, Jr., stated , "Wherever liquid water and chemical energy are found, there is life. There is no exception." Few opportune years like 2004 have presente... | <urn:uuid:0bafe7dd-b45d-4b4d-b3cb-c1a6fbbb96a8> | 3.296875 | 1,279 | Content Listing | Science & Tech. | 28.479879 |
In order to help standardize
the mathematics used in science, setting rules on
measurements is key. The failure of the Mars Climate
Orbiter in 1999 was the result of confusion over
what standard unit of measure was to be used.
There are 4 categories in which standard of
measure are applied: time, distance, mass and
tem... | <urn:uuid:3dec8c2b-7446-4024-8d3e-8945ac5cf5da> | 4 | 753 | Knowledge Article | Science & Tech. | 64.3132 |
- Cascading Style Sheets (CSS)
- Document Object Models (DOM)
In order to understand the complexities of DHTML, it is useful to examine its components in more detail.
Cascading Style SheetsCSS are sophisticated codes that separate web content from the web desplay - the style, positioning, colors, fonts, and so on. CSSP... | <urn:uuid:30be1d71-a457-4b0c-ac14-88183a2123c2> | 3.390625 | 449 | Truncated | Software Dev. | 38.10692 |
Where in the world are savannas? In this BrainPOP UK movie, Tim and Moby teach you where savannas are located and how their coordinates affect the climate, vegetation, and animal life there. In this educational, animated movie you’ll learn how tall savanna grass can grow, where the largest savannas can be found, and th... | <urn:uuid:237247f6-86bd-45da-ab58-0763a98b3e88> | 2.90625 | 151 | Truncated | Science & Tech. | 47.0575 |
HomeOracle Page 3 - Database Interaction with PL/SQL, part 3
Combining TABLE and RECORD - Oracle
Jagadish Chatarji has been writing about database interactions with Oracle PL/SQL. The last part started on TYPE, RECORD, and TABLE declarations of PL/SQL. This one now goes further into TABLE, RECORD, and using them togeth... | <urn:uuid:4b58d36b-57de-4a5b-856f-ff1cb7b8c3ce> | 2.71875 | 523 | Documentation | Software Dev. | 58.196804 |
Indian Ocean Tsunami Animation
Watch an animation of the 2004 Boxing Day Indian Ocean Tsunami.
Download the 4.3 megabyte animation here. It is in *.mov format.
Best played with Apple Quicktime Player.
Modelling performed by William Power using the MOST software developed by Vasily Titov at PMEL.
The Indian Ocean tsunam... | <urn:uuid:84ee878c-d4f9-4dcb-8743-890c345be89e> | 4.0625 | 449 | Truncated | Science & Tech. | 53.966865 |
What is Nuclear Fission?
Nuclear fission results in a great deal of energy being released in an explosion.
CREDIT: Nevada Division of Environmental Protection
Nuclear fission is a reaction in which a large nuclei breaks apart into two smaller nuclei, releasing a great deal of energy.
Nuclei can fission on their own spo... | <urn:uuid:e847a134-7dc4-4096-93bd-76e209c7d483> | 4.25 | 359 | Knowledge Article | Science & Tech. | 52.381099 |
The FLSTSSN gathers data on dead, sick, or injured (i.e., stranded)
sea turtles found in Florida.
This network functions as a part of an eighteen-state network
led by National Oceanic and Atmospheric Administration's National
Marine Fisheries Service (NMFS). In Florida, strandings are
documented by the Fish and Wildlif... | <urn:uuid:a69773ef-8bf3-4160-95a6-981775608d5d> | 2.796875 | 384 | Knowledge Article | Science & Tech. | 31.393908 |
Milky Way's neighbour galaxies may have brushed closely long ago
A recent study at National Science Foundation's Green Bank Telescope (GBT) have revealed that two of our Milky Way's neighbor galaxies may have had a close encounter billions of years ago.
The new observations have confirmed a discovery of 2004 that claim... | <urn:uuid:557f75e0-3c23-4357-8294-bdd4824a0362> | 3.03125 | 582 | Comment Section | Science & Tech. | 41.846418 |
- What are the fundamental building blocks of matter?
- How can I identify them?
- Which forces hold them together?
- How do these forces work?
- How far have the secrets of forces and matter been understood so far?
Find the answers to these and other questions
by browsing, reading, and working through some of the educ... | <urn:uuid:b75b5ecb-b6ed-47fb-9612-4a76c94de97f> | 3.296875 | 190 | Content Listing | Science & Tech. | 42.472668 |
The dehydration of sucrose
Demonstrations designed to capture the student's imagination, by Colin Baker of Bedford School.
In this issue: the dehydration of sucrose
Sucrose is a disaccharide with the formula C12H22O11. On hydrolysis, it yields the two monosaccharides, glucose (aldohexose) and fructose (ketohexose), and... | <urn:uuid:aa33bc70-8b54-487d-93c4-319cdd55ac5c> | 3.71875 | 879 | Tutorial | Science & Tech. | 34.988077 |
Sep. 8, 2009 Optical clocks like the strontium clock in the Physikalisch-Technische Bundesanstalt (PTB) in Braunschweig could be the atomic clocks of the future; some of them though are already ten times more precise and stable than the best primary caesium atomic clocks. Now they might also become more compact and eve... | <urn:uuid:bd61b414-4a0a-409c-a77d-b2fcef4c8f86> | 3.84375 | 855 | Truncated | Science & Tech. | 45.668366 |
Friday, February 13, 2009
We asked Byron Tapley, director of the Center for Space Research in the Cockrell School of Engineering, if there’s concern about the GRACE mission.
GRACE stands for Gravity Recovery and Climate Experiment. It is a joint operation of NASA and the German Center for Air and Space Flight. Tapley i... | <urn:uuid:20150e14-92b3-4e87-b8b6-4db1d37efca3> | 3.359375 | 284 | Audio Transcript | Science & Tech. | 40.407727 |
Tornadoes can occur at any time of the year and just about anywhere in the world. However, the unique geography of the United States helps to produce some of the most favorable conditions for their development.
The months with the greatest number of tornadoes overall are April, May, and June, but tornadoes can and do o... | <urn:uuid:fcdb4c5f-3b0a-4635-83f1-f4b77424787b> | 4.1875 | 572 | Knowledge Article | Science & Tech. | 32.800519 |
Tritium is a kind of hydrogen. Tritium is radioactive. Tritum has a half-life of 12.3 years. Pretend you started with 100 kilograms of tritium. After 12.3 years (one half-life), only half (50 kg) of the tritium would be left (yellow lines). After 24.6 years (two half-lives), only one-quarter (25 kg) of the original 100... | <urn:uuid:39b4cd61-77f6-4300-a1f9-bc68c314ba08> | 3.234375 | 120 | Knowledge Article | Science & Tech. | 84.23169 |
The scientists are removing the muscle layer to reveal the pygmy right whale’s unusual bone structure.
This is Dr Sentiel Rommel’s thoughts on the rib structure:
You can see the ribs gradually changing to the unique flattened and overlapping ribs on the right. the space between the ribs allows them to move as the whale... | <urn:uuid:963f2797-5717-4738-849e-c9d95f7cb460> | 3.140625 | 257 | Personal Blog | Science & Tech. | 53.971053 |
Following (below left) is the Hockey Stick diagram endorsed by Geoffrey Boulton, General Secretary of the Royal Society of Edinburgh, in their December 2009 (post-Climategate) Policy Advice statement Climate Change and the U.N Copenhagen Summit here. On the right is a confirmation plot from data archived in late 2009 a... | <urn:uuid:a616afd7-59e2-4528-a670-25a1ad5be2e5> | 3.125 | 1,484 | Personal Blog | Science & Tech. | 49.346565 |
Brief SummaryRead full entry
BiologyInformation on the biology of Bannerman's turaco is extremely limited, but fruits are believed to make up the bulk of its diet, primarily the fruits and berries of Podocarpus milanjensis, as well as figs (4). Breeding takes place during the early rainy season from March to June. Nest... | <urn:uuid:c5af61ee-e5ac-470f-a9ce-695f40a3d478> | 3.265625 | 140 | Knowledge Article | Science & Tech. | 44.52 |
GNU parallel is a shell tool for executing jobs in parallel locally or using remote computers. A job is typically a single command or a small script that has to be run for each of the lines in the input. The typical input is a list of files, a list of hosts, a list of users, a list of URLs, or a list of tables. If you ... | <urn:uuid:82f757d7-98cc-4924-846b-140f57122d32> | 2.90625 | 894 | Content Listing | Software Dev. | 40.325644 |
Saturday, October 13, 2007
Andrew Steckl has revealed an intriguing new piece of evidence that nature has more power than humans have yet to imagine. His work on photonics at the University of Cincinnati has focuses on intensifying the light produced by LEDs with biological material.
“Biological materials have many tec... | <urn:uuid:30bc5bff-cb34-4c9a-b194-c0868de26e57> | 3.09375 | 221 | Personal Blog | Science & Tech. | 25.30477 |
Dear forum members,
please can someone help me to understand how to do this problem
Determine the sum of all quotients where m and n are whole numbers and
I don't understand how to do this.
Any help is appreciated.
Thank you in advance!
Thank you so much!
Now I get the method. But won't it be quite a long calculation, ... | <urn:uuid:bdab3068-1c6b-4fe4-9bf3-bd059a206f13> | 2.96875 | 359 | Comment Section | Science & Tech. | 74.510622 |
Understanding where to locate celestial objects, and how those objects move
across the sky is fundamental to enjoying the hobby of astronomy. Most amateur
astronomers adopt the simple practice of "star-hopping" to locate
celestial objects by using star charts or astronomical software which identify
bright stars and sta... | <urn:uuid:fb7c1e8b-b98b-4436-a7d1-f4f5a73bcda2> | 3.90625 | 1,256 | Documentation | Science & Tech. | 39.860686 |
Mantle dynamics, uplift of the Tibetan Plateau, and the Indian Monsoon
Article first published online: 14 JUN 2010
Copyright 1993 by the American Geophysical Union.
Reviews of Geophysics
Volume 31, Issue 4, pages 357–396, November 1993
How to Cite
1993), Mantle dynamics, uplift of the Tibetan Plateau, and the Indian Mo... | <urn:uuid:4e54af9d-fbbf-4b9c-9e2e-4da8d908821c> | 2.734375 | 935 | Academic Writing | Science & Tech. | 21.328126 |
Colorado Insects of Interest
Scientific Name: Araneus gemmoides Chamberlin and Ivie
Class: Arachnida (Arachnids)
Order: Araneae (Spiders)
Family: Araneidae (Orbweaver spiders)
Identification and Descriptive Features: The large, full-grown females (Figure 1) are the stage most often seen. These vary from about 5-7 mm lo... | <urn:uuid:96267b75-a798-440c-a99b-371cd628c213> | 3.671875 | 818 | Knowledge Article | Science & Tech. | 34.722927 |
Tuesday 21 May
Sodom’s apple milkweed (Calotropis procera)
What’s the World’s Favourite Species?Find out here.
Sodom’s apple milkweed fact file
- Find out more
- Print factsheet
Sodom’s apple milkweed description
Growing as a spreading shrub or a small tree, Sodom's apple milkweed (Calotropis procera) has simple stems ... | <urn:uuid:39280d00-2cf4-4f25-b7e7-98aa3b78468b> | 3.265625 | 1,827 | Knowledge Article | Science & Tech. | 39.493431 |
by Professor Paul Weiss
Designing, synthesizing, assembling, operating, and measuring molecular
devices give us the ability to study the ultimate limits of function.1-4 We seek to understand the rules and limits associated
with such devices given that we are able to know the precise positions and
connections of all the... | <urn:uuid:dbd5360d-d2f8-4d39-85f7-80f13a868a29> | 2.765625 | 880 | Academic Writing | Science & Tech. | 42.233897 |
Cold-blooded organisms, more technically known as poikilothermic, are animals that have no internal metabolic mechanism for regulating their body temperatures. Some (usually smaller) animals have unregulated temperatures, but most have sophisticated physiological and behavioral techniques for obtaining their desired co... | <urn:uuid:faae1b54-0280-4571-9ca0-41d51efd7798> | 4.09375 | 633 | Knowledge Article | Science & Tech. | 22.250668 |
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.
The metal in main-group organometallic compounds can be any of the elements in the s block (i.e., groups 1 and 2) or any of the heavier elements i... | <urn:uuid:85a6779c-d461-4235-adf6-73cd67435738> | 2.796875 | 142 | Truncated | Science & Tech. | 76.222516 |
In the mathematical subfield of numerical analysis, numerical stability is a desirable property of numerical algorithms. Mathematics is the body of Knowledge and Academic discipline that studies such concepts as Quantity, Structure, Space and Numerical analysis is the study of Algorithms for the problems of continuous ... | <urn:uuid:7a8e2001-02f4-4100-a86f-3e9ac894dc91> | 3.6875 | 1,547 | Knowledge Article | Science & Tech. | 27.062279 |
Signals formed from random processes usually have a bell shaped pdf. This is called a normal distribution, a Gauss distribution, or a Gaussian, after the great German mathematician, Karl Friedrich Gauss (1777-1855). The reason why this curve occurs so frequently in nature will be discussed shortly in conjunction with d... | <urn:uuid:b26f49de-f35d-4e82-a975-9c27fcd38005> | 4.0625 | 1,036 | Academic Writing | Science & Tech. | 52.670961 |
Tue, 11 Dec 2001 10:42:55 +0000
> Simon> gcd x y is the greatest POSITIVE integer that divides
> Simon> both x and y.
> I find it confusing to read a definition which contains redundant
> information. Instead, I'd suggest to add something like:
> "Note: this number is always positive"
Or, perhaps easier on the eye,
"gc... | <urn:uuid:54defbf9-a3af-47bc-a7a6-293bd549cc34> | 3.171875 | 130 | Comment Section | Software Dev. | 58.4075 |
The seasons are caused by the tilt of Earth's axis (23.4°) and not by the fact that Earth's orbit around the Sun is an ellipse. The average distance of Earth from the Sun is 93 million miles; the difference between aphelion (farthest away from the Sun) and perihelion (closest to the Sun) is 3 million miles, so that per... | <urn:uuid:32692b8e-d068-42a3-a4ef-d75fc6d917aa> | 4.375 | 576 | Knowledge Article | Science & Tech. | 67.854562 |
Java applet is a snippet of code that works as an individual application. It is coded using the Java bytecode. Bytecode is a type of programming that is exclusive for Java programming. Applets make use of the Java Virtual Machine, more commonly known as JVM, for its working. However, you can also run them on other stan... | <urn:uuid:ebeeabcf-7fc5-429f-8c0e-f1499201f2ab> | 3.546875 | 632 | Knowledge Article | Software Dev. | 44.675024 |
16 April 2009
Gran Sasso National Laboratory survives the Italian earthquake
Last week a major earthquake struck Italy about 10 kilometres from the Laboratori Nazionali del Gran Sasso (Gran Sasso National Laboratory). The inhabitants of the city of L'Aquila nearby the laboratory suffered numerous injuries and loss of l... | <urn:uuid:04e784da-c613-45b1-a0c7-5785c17232a6> | 2.9375 | 1,209 | Nonfiction Writing | Science & Tech. | 24.843992 |
Asexual Reproduction in Diatoms
Imagine a hat box: the lid is the same size and shape as the box itself, except that the lid is just slightly bigger so that it fits snugly over the box. This is how a diatom cell wall, or frustule, is shaped. The "lid" is called the epivalve and the "box" is called the hypovalve. The tw... | <urn:uuid:239c606d-fac0-4dbf-9c3b-4d0a46190803> | 4 | 301 | Knowledge Article | Science & Tech. | 51.903462 |
|Water, water everywhere - but at least one protein can function without
the wet stuff. Researchers from the University of Bristol, UK, swapped
the coating of water on myoglobin proteins - which normally carry oxygen
to muscle and give raw meat its red colour - with a synthetic polymer
that acts as a surfactant, effect... | <urn:uuid:9202ac95-fd5e-49a0-ae4a-22a4211e3a71> | 3.4375 | 340 | Knowledge Article | Science & Tech. | 33.334819 |
|Feb2-13, 02:20 PM||#1|
Trouble interpreting Bode diagram
Trying to get my head around frequency response and Bode plots, but I'm having trouble interpreting what's going on. The bode plot of a function is expressing what would happen to my function if I multiply it with sin(ωt), right?
To get a better feel for it, I a... | <urn:uuid:0b91cada-0082-42bf-8c2d-4b4b4cafc31b> | 2.6875 | 288 | Comment Section | Science & Tech. | 46.234426 |
How reliable are climate models?
What the science says...
|Select a level...||Basic||Intermediate|
While there are uncertainties with climate models, they successfully reproduce the past and have made predictions that have been subsequently confirmed by observations.
There are two major questions in climate modeling - ... | <urn:uuid:88ab9203-4fc5-4da7-9f2a-7293df38a6d8> | 3.484375 | 1,326 | Knowledge Article | Science & Tech. | 41.126856 |
Alula Australis 4?
|Home | Stars | Orbits | Habitability | Life ||
On March 26, 2012, a team of astronomers using NASA's Wide-field Infrared Survey Explorer (WISE) submitted a pre-print which revealed a very dim and cool, T8.5 brown dwarf (designated WISE J111838.70+312537.9) that exhibits common proper motion with thi... | <urn:uuid:3e80f136-2346-4b07-b042-8a6bfb20effd> | 3.109375 | 4,186 | Knowledge Article | Science & Tech. | 72.500693 |
A geologic and oceanographic study of the waters and Continental Shelf of Gulf of the Farallones adjacent to the San Francisco Bay region. The results of the study provide a scientific basis to evaluate and monitor human impact on the marine environment.
The Sediment Transport Instrumentation Facility at USGS Woods Hol... | <urn:uuid:7d7ac812-8f22-4642-91b6-6b805ef5d0a1> | 3.140625 | 216 | Content Listing | Science & Tech. | 28.265488 |