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We say one integer divides another if it does so evenly, that is with a remainder of zero (we sometimes say, "with no remainder," but that is not technically correct).
More formally, mathematicians write:
If a and b are integers (with a not
zero), we say a divides b if there
is an integer c such that b = ac.
We use thi... | <urn:uuid:f2aaad95-8881-45f1-b28d-8e4979d8963f> | 4.59375 | 342 | Structured Data | Science & Tech. | 84.794631 |
U.S. Geological Survey Open-File Report 2013–1026
Though volcanic eruptions are comparatively rare in the American Southwest, the States of Arizona, Colorado, New Mexico, Nevada, and Utah host Holocene volcanic eruption deposits and are vulnerable to future volcanic activity. Compared with other parts of the western Un... | <urn:uuid:0fcab570-83d9-4608-a4d8-03044dd2655a> | 2.875 | 555 | Academic Writing | Science & Tech. | 27.441031 |
Evolving Dispersal: Where to Go Next?
Habitat destruction and global climate change are two major threats to the persistence of ecosystems. The probability that a species survives such changes depends on its ability to track environmental shifts, either by moving between patches of habitat or by rapidly adapting to loc... | <urn:uuid:8e7cbd6c-dcd3-4071-9e6e-c32eb15d1bb3> | 3 | 203 | Academic Writing | Science & Tech. | 42.522938 |
Sun-Moon-Earth Magnetic Relationship
For most people, the moon is a lump of barren rock that provides us with moonlight, and is the cause of tides. Along with that, we know that gravity is less on the moon, allowing astronauts to take floating steps. Few people know that our moon has a magnetic field, just like the Sun... | <urn:uuid:2ec86904-b3f2-4437-846d-e7ebd9121a33> | 3.28125 | 651 | Personal Blog | Science & Tech. | 52.581745 |
Science Fair Project Encyclopedia
The gram or gramme, symbol g, is a unit of mass, and is defined in the SI system of units as one one-thousandth of a kilogram (i.e., 1x10-3 kg). The kilogram, in turn, is defined as the mass of a specific platinum-iridium cylinder maintained at the International Bureau of Weights and M... | <urn:uuid:f7c90447-d8f7-4d1f-867c-c99c25beb639> | 3.78125 | 233 | Knowledge Article | Science & Tech. | 50.631407 |
The background image for these pages is created
from satellite-derived free air gravity anomalies (gray-scale) and color contours of the
Earth's geomagnetic inclination, declination and field strength.
Satellite-derived free air gravity anomalies
Ocean surfaces represent a gravitational
equipotential surface. Free air ... | <urn:uuid:064d0f7b-17ea-405f-9bac-b72fc68bae26> | 3.53125 | 426 | Knowledge Article | Science & Tech. | 42.062592 |
Young sharks learn from friends
Lemon shark / LiveScience.com
(LiveScience) Sharks might be able to learn new skills just by watching their friends' behavior, a new study finds.
In experiments at the Bimini Biological Field Station in the Bahamas, a group of researchers corralled 18 juvenile lemon sharks in a large hol... | <urn:uuid:5998dd6f-01d3-4995-9fc5-41c145eae529> | 3.640625 | 522 | Truncated | Science & Tech. | 38.262813 |
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With an accout for my.chemeurope.com you can always see everything at a glance – and you can configure your own website and individual newsletter.
- My watch list
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Could paint particles prote... | <urn:uuid:031801b2-c312-468a-b281-9286e079b2fc> | 2.921875 | 1,436 | Content Listing | Science & Tech. | 31.837476 |
Solar cells are capable of producing a reasonable amount of electric energy from solar light. This has stimulated the imagination of many creative people around the world.
One of the most attractive uses for the photo electricity –electricity produced by light– are the vehicles powered by solar energy. So far, tests on... | <urn:uuid:414c2c7c-f17a-46c6-8b93-4534a4e93110> | 3.734375 | 468 | Personal Blog | Science & Tech. | 41.037778 |
M-Theory And The Higgs Boson
Energetic pieces of threads may finally explain all four fundamental forces of nature and our perceived reality with space, time, matter and motion. This is the new physics.
The basic elements of this so far purely mathematical concept are so-called ‘strings’ and ‘membranes’ — subatomic one... | <urn:uuid:2fb3eef2-bbfc-4999-b26b-66b00418b067> | 2.828125 | 1,303 | Personal Blog | Science & Tech. | 22.88562 |
The most important invention in the past two thousand years?
In my opinion it is the invention by Otto von Guericke in 1660 of a machine which produced static electricity. This device was the primitive tool which unlocked our understanding and application of electricity. Modern power generation, communication, computat... | <urn:uuid:89b41019-568b-43fb-9bd6-613a58bf773a> | 2.796875 | 144 | Knowledge Article | Science & Tech. | 26.209946 |
Contact: Francis Reddy
NASA/Goddard Space Flight Center
Caption: Swift's UVOT acquired this image of Comet Garradd (C/2009 P1) on April 1, 2012, when the comet was 142 million miles away, or 636 times farther than the moon. Red shows sunlight reflected from the comet's dust; violet shows ultraviolet light produced by h... | <urn:uuid:8572e676-3194-4f0a-acda-49dd43d5916a> | 3.078125 | 187 | Truncated | Science & Tech. | 52.818011 |
Figure 12.3: Latitude-month
plot of radiative forcing and model equilibrium response for surface temperature.
(a) Radiative forcing (Wm-2) due to increased sulphate aerosol loading
at the time of CO2 doubling. (b) Change in temperature due to the increase
in aerosol loading. (c) Change in temperature due to CO2 doublin... | <urn:uuid:316e5972-b039-4796-bb2e-4805484eff6c> | 3.046875 | 152 | Academic Writing | Science & Tech. | 40.262647 |
Back to Earth Sciences
Alt text / descriptions for slideshow images
SlideShow: Welcome to the Earth Sciences Department webpage.
Welcome to the Earth Sciences Department webpage. Alt text provided via a
link below. The slideshow consists of 17 images showing various geologic and
atmospheric events and features.
Slide 0... | <urn:uuid:1d83f5c1-b8d4-4724-9ced-8589d65a54e6> | 3.484375 | 1,036 | Content Listing | Science & Tech. | 48.881604 |
Corals around the world, already threatened by pollution, destructive fishing practices and other problems, are also widely regarded as among the ecosystems likely to be first — and most — threatened with destruction as earth’s climate warms.
But there is reason to hope, researchers are reporting. The scientists, from ... | <urn:uuid:55b50ed1-9862-45d3-9354-d5b704d43178> | 3.765625 | 166 | Truncated | Science & Tech. | 21.058789 |
Early this century, a box with a few wires sticking out and flickering needles that jumped across a chart recorder would probably have impressed the average person. Electric gadgets were newish inventions back then. An uncritical enthusiasm for science was in the air. These are the most charitable explanations for the ... | <urn:uuid:87a31a06-d28f-4af8-a1da-859d72dd323d> | 3.21875 | 208 | Truncated | Science & Tech. | 51.953289 |
IT'S FRIDAY evening, and you're about to head out of the city. But the traffic news tells you that there's a jam on your normal route. Is it worth taking an alternative? And how far out of your way do you need to go to avoid the snarl-up?
If you lived in Duisburg in Germany, you need never wrestle with this kind of dil... | <urn:uuid:68dd2b32-d7d2-4e3f-8aba-d86d665c0827> | 3.25 | 223 | Truncated | Science & Tech. | 64.065 |
THE precursor of life may have learned how to copy itself thanks to simple convection at the bottom of the ocean. Lab experiments reveal how DNA replication could have occurred in tiny pores around undersea vents.
One of the initial steps towards life was the first molecule capable of copying itself. In the open ocean ... | <urn:uuid:bd54c8cf-9c93-4da9-a154-bbe9f99c88a2> | 4.375 | 210 | Truncated | Science & Tech. | 42.83328 |
Explore general as well as scientific information about the movement, chemistry and biology of area surface water environments.
Click the "Learn More" text to learn more about each parameter shown and how it indicates Hydrology.
Water levels typically follow rainfall patterns during periods of wet weather and drought. ... | <urn:uuid:29d0d123-3186-4905-bad0-46016f47037d> | 3.78125 | 390 | Knowledge Article | Science & Tech. | 28.763759 |
Just So You Know
Newts are salamanders that live much or all of their adult lives under water, although not all aquatic salamanders are considered newts. Newts are classified in the subfamily Pleurodelinae of the family Salamandridae, and are found in North America, Europe and Asia. Newts metamorphose through three dis... | <urn:uuid:6ec4a1a8-e8d0-433c-90b5-553c3955b498> | 3.015625 | 136 | Personal Blog | Science & Tech. | 20.0825 |
Pulsed laser deposition (PLD) is a thin film deposition (specifically a physical vapor deposition, PVD) technique where a high power pulsed laser beam is focused inside a vacuum chamber to strike a target of the desired composition. Material is then vaporized from the target and deposited as a thin film on a substrate,... | <urn:uuid:3194e6ba-6798-4856-893e-4dc9a61a6361> | 3.0625 | 1,522 | Knowledge Article | Science & Tech. | 25.867321 |
Source: "Inverse Square Law"
This animation, originally created for a KET distance learning physics course, explains the mathematical formula for the Inverse Square Law by demonstrating how the brightness of light changes with the distance from a source in one, two, and three dimensions. This animation can be viewed in... | <urn:uuid:22e459a4-53ef-4510-bbf2-3c77cc0f98fd> | 3.90625 | 1,494 | Knowledge Article | Science & Tech. | 55.294272 |
There was a recent article at weather.com called Classic Plains Tornado Outbreak Ingredients. It gives an excellent overview, along with weather map examples, of what it takes to generate a tornado. This is absolutely worth a read for any chaser.
The tornado season this year has been absolutely HUGE so far! So, here’s ... | <urn:uuid:5b388cac-5c02-4ffd-9102-2e40c422e606> | 2.796875 | 2,113 | Personal Blog | Science & Tech. | 48.248234 |
Carbon dioxide (CO2) is the most important greenhouse gas produced by human activities, primarily through the combustion of fossil fuels. It accounts for the largest proportion of the 'trace gases' and is currently responsible for 60% of the 'enhanced greenhouse effect'. It is also thought that it's been in the atmosph... | <urn:uuid:bc8ba587-ba5b-4054-84cf-93720da63ddf> | 4.21875 | 596 | Knowledge Article | Science & Tech. | 30.41825 |
Halfway through the entry for Lineodes integra you'll see a character that looks like a crosshair, followed by "Solanum spp. 4-5,8, S. radula4-5, S. jasminifolium4-5, S. tuberosum (=Potato)8." According to Wolfram Mey, the leading lepidopterist of the Museum of Natural History (MfN), Berlin:
The symbol means that the s... | <urn:uuid:d1a381ef-8324-4f50-95fc-305dcf5d1713> | 3.03125 | 332 | Personal Blog | Science & Tech. | 33.942622 |
In 1917, a year after his general theory of relativity was published, Einstein tried to extend his field equation of gravitation to the universe as a whole. The universe as known at the time was simply our galaxy—the neighboring Andromeda, visible to the naked eye from very dark locations, was thought to be a nebula wi... | <urn:uuid:a7288559-c7c8-4df5-a993-b94a0e0a6087> | 3.84375 | 446 | Personal Blog | Science & Tech. | 34.998492 |
What is biological integrity?
supporting and maintaining a balanced community of organisms
What are indacator species?
groups of biological resources that can be used to tell if water is being polluted
how are macro invertabrets good indicator species?
because most of the bugs are VERY sensetive to pollution and tempur... | <urn:uuid:3353dfee-bb72-4c27-b217-9025b9c7eeaa> | 2.875 | 98 | Personal Blog | Science & Tech. | 26.63 |
A molecule (pron.: //) is an electrically neutral group of two or more atoms held together by covalent chemical bonds. Molecules are distinguished from ions by their lack of electrical charge. However, in quantum physics, organic chemistry, and biochemistry, the term molecule is often used less strictly, also being app... | <urn:uuid:a97e0d63-1cb9-4510-b23f-b98e7593e19a> | 3.734375 | 2,676 | Knowledge Article | Science & Tech. | 36.222574 |
|Types of Moths
Ranchman's Tiger Moth
Polka Dot Wasp Moth
Texas Wasp Moth
Black Witch Moth
Corn Earworm Moth
Polyphemus (Silkworm Moth)
Western Sheep Moth
White-lined Sphinx Moth
Types of Moths
Like butterflies, moths belong to the family Lepidoptera.
Often they are described by comparing them with butterflies. Here ar... | <urn:uuid:b4b7bbfc-f9f9-4c32-b0af-13b14009e4b9> | 3.546875 | 479 | Knowledge Article | Science & Tech. | 28.094708 |
Discovering Warrior Wasps
Lynn S. Kimsey is an entomologist, and has been one for most of her life.
So begins the National Science Foundation's recent LiveScience feature on the UC Davis entomologist.
It's an interesting piece. Kimsey, director of the Bohart Museum of Entomology and professor of entomology at UC Davis,... | <urn:uuid:42edfa11-6502-42f5-9347-d721a47bc8ed> | 2.6875 | 613 | Personal Blog | Science & Tech. | 44.480229 |
Java is a programming language that is quite similar to C and C++. Introduced by Sun Microsystems in 1995, Java's popularity has greatly increased throughout the years. Java can create programs that can be run not only on one computer, but also on multiple computers through a network! Java can also be used to create wh... | <urn:uuid:15028047-1f35-4afd-80c4-91b90be0ea00> | 3.265625 | 495 | Knowledge Article | Software Dev. | 50.478 |
Building Your Own Website from the Ground Up
What is a Website?
- A website consists of one or more "pages" that may be accessed by a web browser.
- A web browser is a piece of software that runs on your local computer but shows content from a website hosted on a web server.
- A web server is a computer located at a pa... | <urn:uuid:a6739dea-f778-4897-9b4b-a8b7634d3dc0> | 3.71875 | 940 | Tutorial | Software Dev. | 53.251283 |
The best way to reduce data from passive ranging is suggested
Electromagnetic waves and sound waves are widely used for the determination of the location of objects. Familiar examples are radar, sonar, GPS positioning, Polaroid cameras, police speed meters, and many others. Most are echo devices, generating a wave and ... | <urn:uuid:e00bd1bc-ef6f-4ce5-b0df-8434a6018a1e> | 3.84375 | 1,349 | Academic Writing | Science & Tech. | 44.092435 |
Effects of red tide
Name: Mrs. Corwin's 5th grade class
My 5th grade class would like to know why is it that red tide only affects
humans and not lobsters, fish, etc. Why is the micro-organism so toxic to humans?
Waiting to learn....
Without going into too much detail, the microorganisms responsible for
causing red tid... | <urn:uuid:69129efc-4714-4fcb-83de-fb3500a079bc> | 3.28125 | 360 | Knowledge Article | Science & Tech. | 47.779839 |
In former papers it has been shown that the partial impact of cosmical bodies may not unfrequently produce a central mass and attendant bodies, which I have called respectively a sun or nebula, and planets. The sun is at a high temperature and rotates. The planets, in a solid, liquid, or gaseous state, revolve round in... | <urn:uuid:3f7c712d-8ba7-4ec3-aa48-0ded6603f089> | 3.03125 | 1,803 | Academic Writing | Science & Tech. | 44.448078 |
For the mathematically minded:
There are a few different methods of how to calculate the SOI.
The method used by the Australian Bureau of Meteorology is the
Troup SOI which is the standardised anomaly of the Mean Sea Level
Pressure difference between Tahiti and Darwin.
It is calculated as follows:
[ Pdiff - Pdiffav ]
S... | <urn:uuid:7e3e43c2-9654-4b49-ae72-554a9f5e16bc> | 3.265625 | 280 | Knowledge Article | Science & Tech. | 42.850114 |
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.
dynamics of genetic change
Genetic variation is present throughout natural populations of organisms. This variation is sorted out in new ways in e... | <urn:uuid:c016c3ed-d56d-4c19-912b-eed91475b3c9> | 3.59375 | 134 | Knowledge Article | Science & Tech. | 40.636288 |
Spring Comes Early Across the U.S.
Over the past several decades, with the exception of the Southeast, spring weather has been arriving earlier in most parts of the United States. This shift affects all sorts of biological processes that are triggered by warmer temperatures — not just flowering, but animal migration an... | <urn:uuid:5d327b8f-3037-4f46-ac20-1eaed3069e7d> | 3.71875 | 205 | Knowledge Article | Science & Tech. | 52.965016 |
Kayley Rachel (5th grade) from Texas wanted to know
if temperature made a difference in the strength of magnets. She
researched her question and came up with an experiment to answer her
question. What do you think? Is a hot magnet stronger or
weaker than a cold magnet? Read her science project "Hot
on Magnets" to find ... | <urn:uuid:e4cf6415-20bb-420f-9470-cc2c0b5e7e70> | 3.578125 | 1,058 | Tutorial | Science & Tech. | 63.16344 |
java.lang.Object java.nio.charset.CoderResultA description of the result state of a coder.
A charset coder, that is, either a decoder or an encoder, consumes bytes (or characters) from an input buffer, translates them, and writes the resulting characters (or bytes) to an output buffer. A coding process terminates for o... | <urn:uuid:7f1edf41-0138-481e-9cf7-34ee685fa5a4> | 3.375 | 596 | Documentation | Software Dev. | 23.321435 |
Oxygen is the third most abundant element in the universe. It is a non-metallic element with the symbol O, the atomic number 8, an atomic weight of 15.999, and a melting point of about -218.4°C. Oxygen gas is colorless, odorless, and tasteless. The liquid and solid forms are a pale blue color and are strongly paramagne... | <urn:uuid:55861840-7ed4-48c5-80b7-2e5e36752cb6> | 3.3125 | 1,412 | Knowledge Article | Science & Tech. | 47.434899 |
- A natural or synthetic hydrated
aluminosilicate with an open three-dimensional crystal structure
which water molecules are held in cavities in the lattice. They are
used to soften water.
- An ion that has a positive and
negative charge on the same group of atoms. It is also called
- An inactive biomolecule that is a
... | <urn:uuid:5aa3734f-5360-423e-bf63-a2108f00faaf> | 2.78125 | 121 | Structured Data | Science & Tech. | 26.776707 |
The simplest tool to study three-dimensional arrangements is polarizing microscopy (PM). PM tests the orientation of optical axes of the liquid crystal specimen; these optical axes are closely related to the molecular arrangements in the medium. Unfortunately, PM yields only two-dimensional (2D) textures in the so-call... | <urn:uuid:989a74df-0a0f-45f2-99db-b281bdd77951> | 2.734375 | 337 | Knowledge Article | Science & Tech. | 22.065492 |
Here we study radioactive decay. Shown (red dots) is a large number of identical atomic nuclei, each obeying the same decay law. Now select the mean life time of the nuclei with the slider, press the START button, and watch them decay away as a function of time (displayed in the upper right corner). Shown also is a his... | <urn:uuid:6697e51d-74b8-4002-bae2-a22b166018f2> | 3 | 98 | Tutorial | Science & Tech. | 64.913 |
|Jul12-12, 09:59 PM||#1|
Photon frequency boosting materials
I've been reading about fluorescence and I understand how the band-gap accounts for reemission of photons at a longer wavelength.
However, can a material store a photon, and then given an external energy source reemit at a shorter wavelength?
I'm imagining an... | <urn:uuid:3192d609-dab5-4b7e-a706-7db4a0bdd787> | 2.984375 | 332 | Comment Section | Science & Tech. | 50.77546 |
If a square has a side of length 7 feet, then it has an area of 72, or 49 square feet. If a square has an area of 36 square feet, then the length of its side is 6 feet. If we know the length of a side, then we square it to find the area. If we know the area, then we must undo the process of squaring to find the length ... | <urn:uuid:dca2a7c4-021d-4910-8f4e-658e5503ae87> | 3.53125 | 970 | Documentation | Science & Tech. | 85.419728 |
GRAIL's Gravity Map of the Moon - This image shows the variations in the lunar gravity field as measured by NASA's Gravity Recovery and Interior Laboratory (GRAIL) during the primary mapping mission from March to May 2012. Very precise microwave measurements between two spacecraft, named Ebb and Flow, were used to map ... | <urn:uuid:12bede06-3d08-4a4e-bcf8-c7cecbd44037> | 3.21875 | 147 | Truncated | Science & Tech. | 34.885571 |
Image: Close up of a maggot spiracle
A close up of one spiracle (breathing apparatus) of a fly maggot. Electron micrograph.
- S. Lindsay
- © Australian Museum
The rear ends of maggots (fly larvae) consist of a chamber, in which their anus and posterior spiracles are located. (They also have anterior spiracles). Spiracl... | <urn:uuid:ddfe6be7-5674-4bd5-8a13-a5dec8bec750> | 2.9375 | 111 | Truncated | Science & Tech. | 47.981532 |
Determining OpenGL ES Capabilities
Both the OpenGL ES 1.1 and OpenGL ES 2.0 specifications define a minimum standard that every implementation must support. However, the OpenGL ES specification does not limit an implementation to just those capabilities. The OpenGL ES specification allows implementations to extend its ... | <urn:uuid:2c40196a-8736-4dba-814d-dced25299aed> | 2.78125 | 1,098 | Documentation | Software Dev. | 30.27466 |
Corrosion fatigue is fatigue in a corrosive environment. It is the mechanical degradation of a material under the joint action of corrosion and cyclic loading. Nearly all engineering structures experience some form of alternating stress, and are exposed to harmful environments during their service life. The environment... | <urn:uuid:d1beef51-a8bc-4878-8ade-ccad6a01e5e9> | 3.21875 | 1,595 | Knowledge Article | Science & Tech. | 38.629535 |
Comprehensive DescriptionRead full entry
BiologyOccurs in fast flowing rivers. Eastern, brackish populations enter the lower reach of rivers for spawning (Ref. 1441). Inhabit large lowland rivers and estuaries. Active at night. Prey on benthic invertebrates. Semi-anadromous populations forage in large brackish-water ha... | <urn:uuid:7ec225d5-38f9-4a92-ab7d-9006bd527fad> | 2.8125 | 119 | Knowledge Article | Science & Tech. | 31.384404 |
Wave Generation and Properties
- Rectangular aquarium (a 10 or 20 gallon aquarium will work, though a larger aquarium will make it easier to measure the waves)
- Food coloring
- Rectangular board, as wide as the narrow edge of the aquarium and longer than the height of the aquarium (see diagram below).
- Pour water in ... | <urn:uuid:3dabf082-e45d-46fc-ab10-be564f60c793> | 3.90625 | 577 | Tutorial | Science & Tech. | 59.376819 |
12. A pilot wishes to fly from Toronto to Montreal, a distance of 508 km on a bearing of 075^o. The cruising speed of the plane is 550 km/h. An 80 km/h wind is blowing on a bearing of 125^o
a) What heading should the pilot take to reach his destination?
b) What will be the speed of the plane relative to the ground?
c) ... | <urn:uuid:d1637ff0-e84f-4395-a835-49f5c2059ae1> | 3.28125 | 191 | Q&A Forum | Science & Tech. | 90.466921 |
Multiyear La Niña events and persistent drought in the contiguous United States
Article first published online: 12 JUL 2002
Copyright 2002 by the American Geophysical Union.
Geophysical Research Letters
Volume 29, Issue 13, pages 25-1–25-4, July 2002
How to Cite
Multiyear La Niña events and persistent drought in the co... | <urn:uuid:02dc3013-eef1-4cd3-84c8-f9a0920a4b9a> | 2.828125 | 334 | Academic Writing | Science & Tech. | 51.610809 |
I will try to find time to read the article in Nature (pub on 30 March 2006).
Science Daily — The extraordinary properties of spider's thread are like a blessing for researchers working on polymers. However, the amazing twisting properties it displays are still not very well understood. How can one explain the fact tha... | <urn:uuid:81d11b6e-d432-430c-aae8-82c4e918b4d9> | 2.75 | 528 | Personal Blog | Science & Tech. | 37.847849 |
In this tutorial, we will discuss how to get bytes from buffer. The ByteBuffer
class is a container for handling data. The method allocate( int capacity) creates a new byte
buffer, and the current position will be zero and its limit will be it's capacity. The FileChannel
class creates a channel for reading, writing, ma... | <urn:uuid:07243bce-f59c-4763-af32-5f9f8fffaabc> | 3.265625 | 347 | Documentation | Software Dev. | 47.727054 |
Barium sulfate is a chemical compound composed of barium and sulfate ions. It contains barium in the +2 oxidation state, as in all barium compounds. It does not dissolve in water. If it did, it would be very toxic. It is used in X-rays of the stomach and intestines to see whether there is a problem with them. Its chemi... | <urn:uuid:02faca3f-cf4f-409f-b779-8ae198237f86> | 2.828125 | 83 | Knowledge Article | Science & Tech. | 65.142708 |
We defined the real numbers to be a complete uniform space, meaning that limits of sequences are convergent if and only if they are Cauchy. Let’s write these two out in full:
- A sequence is convergent if there is some so that for every there is an such that implies .
- A sequence is Cauchy if for every there is an suc... | <urn:uuid:0657365b-e409-450c-9812-549c496ddc52> | 3.125 | 393 | Personal Blog | Science & Tech. | 64.442268 |
Science Fair Project Encyclopedia
I have altered the statement that Euclidean geometry is a subset of Riemannian geometry. The set of theorems of Riemannian geometry could be said to be a subset of the set of theorems of Euclidean geometry, if one were to construe the former to mean propositions true in all Riemannian ... | <urn:uuid:e31b0a0e-0d1f-43e6-bf67-4f0dfc198fcb> | 3.078125 | 742 | Comment Section | Science & Tech. | 51.415153 |
Also known as the Cigar Galaxy for its elongated visual appearance,
M82 is a starburst galaxy
with a superwind.
through ensuing supernova explosions and
powerful winds from massive stars,
the burst of star formation in M82
is driving the prodigous outflow of material.
for the superwind from the galaxy's central regions... | <urn:uuid:f96a0b32-8613-4018-9497-0ecbabf14a89> | 2.859375 | 215 | Knowledge Article | Science & Tech. | 44.419262 |
Web development is a necessary part in website creation. It is arguably the biggest one, considering that it incorporates all the other areas, like web design, content development and management, and to some extent, programming and web engineering. Web developers undergo different kinds of programming courses, and so l... | <urn:uuid:279ebd23-19c2-4cd4-aad2-80baf345eab2> | 2.890625 | 597 | Personal Blog | Software Dev. | 35.277375 |
We've all seen the satellite images of Earth at night--the bright blobs and shining webs that tell the story of humanity's endless sprawl.
These pictures are no longer just symbols of human impact, however, but can be used to objectively measure it, according to a study in the December 2008 issue of Geocarto Internatio... | <urn:uuid:6dfb4841-6d7e-48c7-adf9-1dec2ce04cee> | 3.96875 | 402 | Knowledge Article | Science & Tech. | 30.768077 |
An immense and towering thunderhead was gliding to the east, forming a stark backdrop for Crane Lake in the Crescent Lake National Wildlife Refuge in the Sand Hills of Nebraska. I walked up a hill, weaving between the yuccas, looking for the perfect vantage for a photograph of the lake, when something caught my eye.
Th... | <urn:uuid:aaf25f1f-b6ea-4d5c-8aed-dff35f158cc7> | 3.953125 | 841 | Nonfiction Writing | Science & Tech. | 41.691347 |
Hamlington B. D., R. R. Leben, O. A. Godin, et al. (August 2012): Could satellite altimetry have improved early detection and warning of the 2011 Tohoku tsunami? Geophys. Res. Lett., 39 (15), L15605. doi:10.1029/2012GL052386Full text not available from this repository.
The 2011 Tohoku tsunami devastated Japan and affec... | <urn:uuid:f08abe07-067f-4bd7-8bb8-47cfa4475291> | 3.078125 | 244 | Academic Writing | Science & Tech. | 37.846531 |
I have been learning about Java for the past month or so, and have been using Arnow, Dexter and Weiss's Introduction to Programming Using Java. In Chapter 6, there's this Exercise 21, which basically states:
"Write a method mySubStr() that receives two Strings and returns a boolean value: true only if one of the String... | <urn:uuid:c72853d8-4221-429d-bb84-2deeb96a315d> | 2.875 | 177 | Q&A Forum | Software Dev. | 67.37 |
This stalk-eyed fly (Achias rothschildi) belongs to the family Platystomatidae and is a highly localised species endemic to Papua New Guinea.
The eye-stalks are mainly used for display in confrontations with other males as they try to establish territory in order to attract a mate.
During conflict between males
The mal... | <urn:uuid:08cd365b-8262-4ed4-ab30-afcb9a887d38> | 3.171875 | 418 | Knowledge Article | Science & Tech. | 56.725993 |
Transmutation Notebook B, Tree of Life
» listen (mp3, 1:28) to David Kohn provide an introduction to Darwin's tree of life sketch and his private notebooks
Image transcription →
Case must be that one generation then should be as many living as now To do this & to have many species in same genus (as is). REQUIRES extinc... | <urn:uuid:50583b37-adf8-4695-907a-6e4a3625fd54> | 3.34375 | 259 | Truncated | Science & Tech. | 48.449785 |
pwede po ba patulong sa analytic geometry..
1. a satellite has an elliptic orbit with the earth at one focus. at its closest point it is 100 miles above the surface of the earth; at its farthest point 500 miles. find the polar equation of its path. (take the radius of the earth to be 4000 miles.)
2. a hall that is 10 f... | <urn:uuid:abe8f26e-9f07-4153-b72f-d01aa9ed728c> | 2.96875 | 131 | Comment Section | Science & Tech. | 82.923902 |
In recent weeks you might have seen news like this:
Faster than light particles found, claim scientists (Guardian)
Speed-of-light results under scrutiny at Cern (BBC)
Naughty 'Faster Than Light' Neutrinos a Reality? (Discovery)
And what reportedly happened was that neutrinos (ghostly elementary particles usually produc... | <urn:uuid:21cbf78c-de00-4590-91ec-0ebfa0f045ad> | 3.421875 | 738 | Comment Section | Science & Tech. | 40.345707 |
Giant Asteroid's Troughs Suggest Stunted Planet
This full view of the giant asteroid Vesta
was taken by NASA's Dawn spacecraft, as
part of a rotation characterization
sequence on July 24, 2011, at a distance
of 3,200 miles (5,200 kilometers).
Image credit: NASA/JPL-Caltech/UCLA/MPS/
› Full image and caption
An extensiv... | <urn:uuid:892d8349-98a2-4984-9613-aa7baeddc260> | 3.484375 | 430 | Comment Section | Science & Tech. | 60.88 |
Five Reasons You Should Pay Attention to NASA's Mission to Mars
|Concentration of methane found on Mars|
Several research groups over the past six years have reported finding methane in the atmosphere on Mars. In Earth, about 98 percent of the atmospheric methane comes from biological sources such as humans and cows.
"... | <urn:uuid:46c88109-3a38-4735-b5d3-2419ca301d96> | 3.6875 | 409 | Listicle | Science & Tech. | 47.136889 |
In the words of Carl Sagan, "The Earth is a very small stage in a vast cosmic arena." But to us, it's everything. The place where we live, love, work and play. The place where we are born and where we die. From space, Earth is big, blue and beautiful; fragile and inspiring. It's the only planet we've ever been to. In h... | <urn:uuid:7b5d9732-3c69-4aa0-85b3-f9966e779112> | 3.75 | 388 | Knowledge Article | Science & Tech. | 46.794711 |
In complex analysis, an elliptic function is a meromorphic function that is periodic in two directions. Just as a periodic function of a real variable is defined by its values on an interval, an elliptic function is determined by its values on a fundamental parallelogram, which then repeat in a lattice. Such a doubly p... | <urn:uuid:6804cb15-db3a-47d4-a40a-159cf5777bbc> | 3.390625 | 1,507 | Knowledge Article | Science & Tech. | 48.170455 |
This is probably an easy question but I don't get it. Please answer in a easy way :P
Imagine you want to paint circles on a linear line. The line is 100cm long. On the right side you have a circle with a diameter of 15 cm. Now I want to draw more circles until the 100cm are full.
So basically this: o o o o o o o but wi... | <urn:uuid:c4332f04-92e8-44a0-9ba2-5ba6e69c0e3a> | 3.09375 | 224 | Q&A Forum | Science & Tech. | 82.254516 |
Three points X, Y, Z have position vectors x,y,z. Show that X, Y and Z are collinear iff x ^ y + y ^ z + z ^ x = 0.
Here "^" denotes the vector cross product
For the converse, if then (since the other two terms are 0). So is orthogonal to x. But it is also orthogonal to y and z. If x, y and z are linearly independent t... | <urn:uuid:bc7999ed-3e2c-45cd-8dba-9622b7823961> | 3.046875 | 190 | Q&A Forum | Science & Tech. | 79.520745 |
A unique study at the U of A.
"Back, about 1993, we started studying methanogens as possible life forms on Mars," Kral says.
Microorganisms, living in a test tube.
But can they live on another planet?
Professor Kral is trying to answer that question.
"Well, this is our Pegasus chamber, it's a vaccuum chamber and we're ... | <urn:uuid:dd98bf51-4ecb-4584-845f-bbe9765374b8> | 2.84375 | 349 | Audio Transcript | Science & Tech. | 65.379569 |
Exploring Hydrocarbon Depletion
NEW! Members Only Forums!
Access more articles, news & discussion by becoming a PeakOil.com Member.
Page added on August 10, 2012
I mourn for the dodo, poor fat flightless bird, extinct since the eighteenth century. I grieve for the great auk, virtually wiped out by zealous Viking huntsm... | <urn:uuid:3003b881-7208-4ed1-98bb-c1524f1faa64> | 2.734375 | 561 | Comment Section | Science & Tech. | 56.75537 |
Understanding What is Wind Energy
What Is Wind Energy. The definition of wind energy is the energy which we harness from wind current in the atmosphere. Wind turbines capture the kinetic energy of the wind and convert into useful electrical and mechanical energy. The wind happened because of the different of pressure. ... | <urn:uuid:6fceecdd-5cf5-4de5-9a5c-61f43b714efe> | 3.09375 | 625 | Knowledge Article | Science & Tech. | 42.921341 |
Thermodynamics is a branch of physics
which deals with the energy and work of a system.
Thermodynamics deals only with the
large scale response
of a system which we can observe
and measure in experiments.
In aerodynamics, the thermodynamics
of a gas obviously plays an important role in the analysis of
but also in the u... | <urn:uuid:bd94bbc1-39a5-46f4-bc3a-aa0ff9b5b8eb> | 3.390625 | 756 | Knowledge Article | Science & Tech. | 36.364373 |
We know that when an atom absorbs a photon with exactly the right energy, an electron will jump to a higher level. A photon, a particle of light, can be thought of as an electromagnetic wave with a particular oscillation frequency. Different photons have different frequencies along the electromagnetic spectrum. A low e... | <urn:uuid:59cb2d63-a8d3-4596-b2a7-cee7d4834f5b> | 3.703125 | 90 | Knowledge Article | Science & Tech. | 35.1425 |
This activity from Subtangent generates an endless sequence of trigonometry problems in right angled triangles.
Students can choose to focus on finding a missing side, angle or allow a random selection of questions.
The answers are given and, to support learning, include any necessary working out. An on-screen scientif... | <urn:uuid:0168f76c-f53e-4d41-af5d-2901eb2df3bb> | 3.40625 | 141 | Tutorial | Science & Tech. | 25.397566 |
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All Possible Intersections
Thu Aug 09 09:30:32 BST 2012 by Eric Kvaalen
Could we please have the illustration?
"Venn diagrams use overlapping circles to show all possible relationships between sets."
That's not a very good description. They include all the possible intersections of eithe... | <urn:uuid:dbdc51b4-35f0-4b0e-86df-07693566f5d0> | 3.484375 | 203 | Comment Section | Science & Tech. | 63.96859 |
Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
October 16, 1996
Explanation: Research balloon flights conducted in 1912 by Austrian physicist Victor Hess revealed that the Earth was constantly bo... | <urn:uuid:01a22d90-cd4d-4596-ac41-237c54106f7e> | 4 | 297 | Knowledge Article | Science & Tech. | 39.363434 |
Global Dimming in the Hottest Decade
Posted on 25 October 2012 by Rob Painting
- Global surface temperatures in the "noughties" decade (2000-2009) were the warmest in at least 120 years of record-keeping. However, the rate of surface warming, was slower than in the two decades that preceded it.
- Even though global war... | <urn:uuid:7a3d0c55-6ecc-4cab-92aa-40f0b305685a> | 3.765625 | 1,884 | Academic Writing | Science & Tech. | 33.941166 |
In Antarctica in January, 2013 scientists released 20 balloons, to study the giant radiation belts surrounding Earth and how they lose particles, causing electrons from the belts to stream down toward the poles.
NASA is getting ready to launch a new mission to observe a mysterious region of the solar atmosphere that ma... | <urn:uuid:ac3f1a8c-db7b-4648-b18d-07c793185a0a> | 3.375 | 168 | Content Listing | Science & Tech. | 37.415122 |
Studying Earth's atmosphere and building a strong foundation for the future of our planet.
Michael Mann spoke about climate change from two perspectives -- 'reluctant and accidental public figure' and Distinguished Professor.
At NASA's Langley hangar, Bruce Anderson, project scientist for the ACCESS (Alternative Fuel E... | <urn:uuid:e6658f48-744e-41f0-a90a-50ff5c40a4c1> | 3.0625 | 308 | Content Listing | Science & Tech. | 24.176334 |
I am having a bit trouble with a question about rotational volume. So, this is the problem:
"An area R in the xy plane is given by:
0 ≤ x ≤ 1
0 ≤ y ≤ x3
Find the volume when rotating R around the axis y = -1"
Here is how I was thinking. First, I drew this figure:
My idea was to draw the boundaries, and two radius in re... | <urn:uuid:fbdcd7a6-2b72-460a-979c-18fa151a7e9e> | 3.03125 | 186 | Q&A Forum | Science & Tech. | 72.854941 |
An application should be able to produce and consume data from multiple formats. These often include proprietary binary formats and should also include some standard formats, such as Rich Text Format (RTF) or HTML.
The following table lists some formats that can contain ink.
|Binary||Applications should use ink seriali... | <urn:uuid:2bf4d48d-d59c-40d8-9086-31bb73992a36> | 2.78125 | 412 | Documentation | Software Dev. | 38.235663 |
The brute force computational approach will not resolve the outstanding problems in disk galaxy formation. What seems to be needed are further analytical insights that will allow refinement of the simple prescriptions for star formation. One such approach has come from studying turbulence-driven viscous evolution of di... | <urn:uuid:703f67bc-ab44-47c6-bbe1-8c7f309d2475> | 2.90625 | 861 | Academic Writing | Science & Tech. | 37.082976 |
The very highest energy photons, gamma-rays, are too energetic to be detected by standard optical methods. In fact they rarely actually make it to the surface of the Earth at all but interact with molecules in the Earth's atmosphere. The high energy gamma-ray telescopes, such as Veritas and Hess use air Cherenkov teles... | <urn:uuid:cd59078c-4281-456b-b7c3-64c468686ea6> | 4.03125 | 501 | Q&A Forum | Science & Tech. | 37.360692 |
|The ice jets of Enceladus send particles streaming into space hundreds of kilometers above the south pole of this spectacularly active moon. [ more ]|
"Deep inside Enceladus, our model indicates we've got an organic brew, a heat source and liquid water, all key ingredients for life," said Dr. Dennis Matson, Cassini pr... | <urn:uuid:53cbb357-d710-4f24-8365-b5fe24af2b12> | 4.03125 | 806 | Knowledge Article | Science & Tech. | 30.765613 |
By Charles Q. Choi, SPACE.com
Debris spots found on stars reveal planets that went splat like bugs on a windshield.
The result: metal smears on the surface of parent stars, said European Southern Observatory astronomer Luca Pasquini, who offered up another analogy:
"It is a little bit like a tiramisu or a cappuccino," ... | <urn:uuid:059aaff8-ebc2-4212-9e68-cf910b47bf77> | 3.28125 | 684 | Truncated | Science & Tech. | 45.3529 |
Wind and Wave
Scientists, engineers and geographers at ODU will help decide whether coastal Virginia's abundant supply of wind and wave energy should be tapped to generate electricity.
Wind turbines are producing electricity throughout the world today. The so-called "wind farm" clusters of modern windmills sometimes ar... | <urn:uuid:9c905814-ed0f-423f-b57f-88f08fb47ad5> | 3.328125 | 298 | Knowledge Article | Science & Tech. | 25.251332 |
The Rhynie Chert Flora
The early land plants found as fossils in the Rhynie chert are locally preserved in such exquisite detail that cellular details can be examined. This has allowed detailed anatomical studies to be performed on the Rhynie plants. The plants are relatively simple in their level of organisation and i... | <urn:uuid:0fd9f3ab-0e56-489a-943b-51bf02b48603> | 3.515625 | 622 | Knowledge Article | Science & Tech. | 37.19902 |
Most of our energy comes from the sun but there is also an enormous reservoir of energy in the form heat beneath the Earth. Sometimes this heat rises to the surface in the form of hot water or steam. In a few places, powerful jets of steam shoot up from the ground as geysers. Geothermal steam and hot springs have been ... | <urn:uuid:32544ba5-fa80-40c5-9a72-52c642ff085b> | 3.984375 | 254 | Knowledge Article | Science & Tech. | 49.103985 |
Typically recorded as "Eucalyptus," several genera have this general morphology.
Myrtaceae pollen is typically oblate and triangular in polar view. The apertures are short
furrows in a thickened portion of the wall. The distinctive pattern typically seen in polar view
is formed by thinning of the exine, resembling a sy... | <urn:uuid:d9390685-3966-4d3f-ab6d-b5ac4334daa7> | 3.671875 | 616 | Knowledge Article | Science & Tech. | 27.014 |
Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °
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Glad about that.
Well I was a bit busy so I couldn't post...
@ bob bundy
Well how can x = 0 makes the expression goes to +/- infinity as dividin... | <urn:uuid:db61552f-02cd-4dc2-8273-980a7a14a6bf> | 3.5 | 1,075 | Comment Section | Science & Tech. | 84.212343 |
Adult male Northern Saw-whet Owls weigh only about as much as an American Robin. (c) Scott Comings
In late fall, cold fronts come through our area and something really neat happens! What is so neat about the oncoming winter you may ask? Well, when we have these conditions this time of year, we also have lots of norther... | <urn:uuid:19ace2ff-6e40-4c41-b75f-9f7cb0ee984c> | 3.203125 | 534 | Knowledge Article | Science & Tech. | 50.747923 |
Classical Electron Radius
Name: Biek V.
Hello, what is the "size" of an electron in meters, given
that it is seen as a particle, which is partly true.
In classical terms, the electron radius is about 2.818 * 10^-15 m
From: Particle Data Group Particle Physics Booklet July 2004
--Nathan A. Unterman
Click here to return ... | <urn:uuid:8b46f038-425e-4bc4-9456-7c3ceb77bd55> | 2.96875 | 99 | Q&A Forum | Science & Tech. | 63.695 |
Introduction to JavaServer Facesby Alexander Prohorenko and Olexiy Prokhorenko
This article is meant to acquaint the reader with JavaServer Faces, commonly known as JSF. JSF technology simplifies building the user interface for web applications. It does this by providing a higher-level framework for working with your w... | <urn:uuid:4124b234-91e0-4ac7-b50b-f5e8dc152042> | 2.9375 | 1,543 | Documentation | Software Dev. | 40.91503 |