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Hints for Beginners in Amateur Chemistry
Join in the Fun of Experimenting at Home! This Article Tells How Easy It Is to Start
By RAYMOND B. WAILES
IF YOU have been following this series of articles for some time, you probably have already set up a more or less complete chemical workshop in which to carry on your experi... | <urn:uuid:6d1e7fe0-3866-4308-911c-04d9ad21614a> | 2.78125 | 1,840 | Content Listing | Science & Tech. | 46.204602 |
Useful datasets for satellite data processing
The mapping of global parameters such as SST, albedo, terrain types,
surface elevation, emissivity…have been widely produced from polar
satellites, serving as important input parameters for users who are processing
This page provides a list of parameters together with data ... | <urn:uuid:c637f179-1458-4133-81a8-f9378174c35f> | 2.734375 | 1,297 | Content Listing | Science & Tech. | 30.30125 |
There are two methods of including a file in PHP: include and require.
<?php include "file.php"; require "file.php"; ?>
They both perform essentially the same function, but have one major difference: include will only throw a warning if there is a problem during the include process; require, however, will halt executio... | <urn:uuid:724731a4-3d53-4271-ad4f-cfdd9a6c8576> | 2.984375 | 325 | Tutorial | Software Dev. | 39.528769 |
The C API code is distributed with MySQL. It is included in the
mysqlclient library and allows C programs to
access a database.
Many of the clients in the MySQL source distribution are written in
C. If you are looking for examples that demonstrate how to use the C
API, take a look at these clients. You can find these i... | <urn:uuid:fa28998b-9c25-411a-8bd0-17f1a7e811d9> | 3.015625 | 615 | Documentation | Software Dev. | 52.544776 |
C. Frederick Hansen
The thermodynamic and transport prorerties of high-temperature air are found in closed form starting from approximate partition functions for the major components in air and neglecting all minor components. The compressibility, energy, entropy, the specific heats, the speed of sound, the coefficient... | <urn:uuid:8fa7ce1e-5a53-4497-bdd7-ac411a0ad7ce> | 2.75 | 195 | Academic Writing | Science & Tech. | 43.423947 |
Wrapping D's structs is similar to wrapping classes. In fact, many of the operations are identical.
void wrap_struct(T, char structname = symbolnameof!(T), Params...) ();
- T is the struct being wrapped.
- structname is the name of the struct as it will appear in Python.
- Params is a series of struct types (defined be... | <urn:uuid:6120c112-c543-48d0-bba6-4c820339d3c0> | 3.015625 | 670 | Documentation | Software Dev. | 57.230281 |
It turns out that the tangent bundle construction is actually a functor. Given a smooth map between smooth manifolds, we will get a smooth map . Yes, we’d usually write for a functor’s action on a map, but the notation is pretty classical.
So if we’re given a tangent vector we want to get a tangent vector . And since w... | <urn:uuid:da5f48db-e177-477c-8fd2-11cd959284da> | 2.984375 | 358 | Personal Blog | Science & Tech. | 59.420921 |
|At the center of our Milky Way Galaxy,
a mere 27,000 light-years away,
lies a black hole with 4 million times the mass of the Sun.
Fondly known as Sagittarius A* (pronounced A-star),
the Milky Way's black hole is
fortunately mild-mannered compared
to the central black holes in
distant active galaxies, much
more calmly... | <urn:uuid:374a0efa-6982-446e-af33-e95e5a935e1c> | 3.328125 | 297 | Knowledge Article | Science & Tech. | 48.320405 |
1. (Science: zoology) a shark of the genus Sphyrna or Zygaena, having the eyes set on projections from the sides of the head, which gives it a hammer shape. The Sphyrna zygaena is found in the North atlantic. Called also hammer fish, and balance fish.
2. (Science: zoology) a fresh water fish; the stone-roller.
Results ... | <urn:uuid:72419c69-62b8-402d-8ff2-93eee7d7cd31> | 3.328125 | 166 | Structured Data | Science & Tech. | 58.629443 |
Aquatic Habitat Protection
Several power plants withdraw large quantities
of cooling water from the Hudson River
There are several programs within the Division of Fish, Wildlife and Marine Resources that focus on the protection of aquatic habitat including the Protection of Waters program, the Instream Habitat Protecti... | <urn:uuid:93c192b5-cbb7-4065-9b0a-dbba5268a854> | 2.765625 | 2,962 | Knowledge Article | Science & Tech. | 29.265168 |
Definitions for absorption band
a dark band in the spectrum of white light that has been transmitted through a substance that exhibits absorption at selective wavelengths
one of any number of ranges of wavelengths of electromagnetic radiation absorbed by a substance
Use the citation below to add this definition to your... | <urn:uuid:642cc4b9-85a3-4d89-a629-d492d79d7b5b> | 2.90625 | 98 | Structured Data | Science & Tech. | 49.077698 |
Contact: Maria Martinez
Southwest Research Institute
Caption: Shown is an off-center, low-velocity collision of two protoplanets containing 45 percent and 55 percent of the Earth's mass. Color scales with particle temperature in kelvin, with blue-to-red indicating temperatures from 2,000 K to in excess of 6,440 K. Afte... | <urn:uuid:ccffb165-e287-492e-9000-07d965f1d171> | 3.109375 | 178 | Truncated | Science & Tech. | 32.899158 |
|CHP Home||GenChem Analytical Instrumentation Index|
The underlying principles that determine chromatographic separations are dynamic behaviors that depends on partitioning and mass transport. These phenomena are too complex to model directly, and chromatography theory consists of empirical relationships to describe ch... | <urn:uuid:57515403-3689-4fb0-9198-5d2aa4880936> | 2.84375 | 244 | Knowledge Article | Science & Tech. | 38.848571 |
Here's an article detailing on what's happened and what it might mean.
CERN reported that a neutrino beam fired from a particle accelerator near Geneva to a lab 454 miles (730 kilometers) away in Italy traveled 60 nanoseconds faster than the speed of light. Scientists calculated the margin of error at just 10 nanosecon... | <urn:uuid:4a24a1e3-6408-4384-9cc4-dd5eee3f121e> | 2.703125 | 110 | Comment Section | Science & Tech. | 56.302818 |
Green machine is our weekly column on the latest advances in environmental technologies
Pond scum. The term surfaces in every news report about the decades-long effort to get energy from algae. But more respect for the tiny creatures may soon be in order: industry and governments have started pouring billions into alga... | <urn:uuid:9ec7cf0e-0ad2-4683-9625-d312a52ed43e> | 3.25 | 1,492 | Comment Section | Science & Tech. | 51.783607 |
Stressed Plastic Turning White
Why does colored plastic turn white when bent? example -
Lime green pen cap
There are two possible reasons for this: crystal formation due to cold
drawing or a process known as crazing. Essentially what is happening is
that the amount of refraction (bending of light) increases either due ... | <urn:uuid:c183b25c-7c55-46c1-adaa-c737c45ca703> | 3.234375 | 452 | Knowledge Article | Science & Tech. | 39.328603 |
*Note: This is an abbreviated Project Idea, without notes to start your background research, a specific list of materials, or a procedure for how to do the experiment. You can identify abbreviated Project Ideas by the asterisk at the end of the title. If you want a Project Idea with full instructions, please pick one w... | <urn:uuid:37438fa2-b15a-4e37-80c1-7e8bc3d189bd> | 3.75 | 575 | Tutorial | Science & Tech. | 50.1175 |
- Black holes are theoretical structures in spacetime predicted by the theory of general relativity. Nothing can escape a black hole’s gravity after passing inside its event horizon.
- Approximate quantum calculations predict that black holes slowly evaporate, albeit in a paradoxical way. Physicists are still seeking a... | <urn:uuid:8778c819-f6f2-46b9-9dae-48a9f6f915e0> | 3.984375 | 421 | Truncated | Science & Tech. | 29.258381 |
Impact of UML Techniques in Test Case Generation
UML is a standard language that used in business modeling for specifying, visualizing and constructing the software artifacts. UML provides the capability to enhance (explore) the static structure and dynamic behavior of a software system. Different UML strategies and te... | <urn:uuid:3787f3a7-5f7c-4e66-8fe8-a19cce85bc2e> | 2.734375 | 113 | Truncated | Software Dev. | 22.240833 |
“The total number of stars in the Universe is larger than all the grains of sand on all the beaches of the planet Earth.”
~ Carl Sagan
When I was young I would imagine that if the earth were the size of a baseball then perhaps the sun would be the size of a beach-ball and that they’d be about 20-ft (6 meters) apart at ... | <urn:uuid:8e0bc7b0-a414-4c9b-a3fa-d07e4cd82cf4> | 3.953125 | 2,079 | Personal Blog | Science & Tech. | 64.983395 |
Want to stay on top of all the space news? Follow @universetoday on Twitter
There are several ways to measure the speed of the fastest spacecraft and each definition gives credit to a different craft. We will look at four categories in this article: fastest escape speed from Earth’s atmosphere, fastest speed on a solar... | <urn:uuid:cdd0fc6e-8ecd-4d25-a40e-e62fced36a3d> | 3.21875 | 428 | Knowledge Article | Science & Tech. | 53.077637 |
Bug of the Week
Green Weevil, Red Weevil (Family Curculionidae)
The BugLady loves weevils – chunky beetles with antennae placed partway between the top and tip of their Jimmy Durante snouts. Weevils (Family Curculionidae) are the largest family in the beetle order Coleoptera, which is the largest order in Class Insecta... | <urn:uuid:ba88b45f-b352-4a24-b637-fa7f8b470103> | 3.203125 | 1,485 | Knowledge Article | Science & Tech. | 47.237157 |
Vast Hot Gas Plume May Be A Passing Attraction
The Chandra image of the Centaurus galaxy cluster shows a long plume-like feature resembling a twisted sheet. The plume is some 70,000 light years in length and has a temperature of about 10 million degrees Celsius. It is several million degrees cooler than the hot gas aro... | <urn:uuid:86982c2e-3a05-498b-b05f-af5010a74e7f> | 3.734375 | 223 | Knowledge Article | Science & Tech. | 47.36875 |
Certainly one for the Potential list…
Many have argued under the climate change mitigation banner that so-called ‘old-growth’ (let’s call them primary forests henceforth to distinguish them from [usually] younger secondary forests) do not provide net carbon uptake because most of their growth has occurred in the past. ... | <urn:uuid:203d1152-ab9f-4a47-86e8-c36c392be15e> | 2.875 | 370 | Personal Blog | Science & Tech. | 26.80427 |
The number of square meters in the helium flux tube, which in the plasma density diagrams appears to be approx. 5 times larger than the sun, is 758,733,957,500,000 sq/metres. This equals a average current density of any cross section of the flux tube at 1,896,834,893,750,000,000,000 amps assuming a homogenous cross sec... | <urn:uuid:20960124-6e88-41e9-95f5-fae6f5193dc6> | 2.6875 | 294 | Comment Section | Science & Tech. | 82.862321 |
(Submitted November 24, 1997)
Where is the closest neutron star?
The neutron star which we currently rank as "nearest to Earth" is a radio
pulsar called J0108-1431. It is within 100 parsecs of the Sun. A parsec is
a unit of distance in astronomy; it is equal to 3.26 light years, or 3.1 x
for the Ask an Astrophysicist T... | <urn:uuid:dbbb9723-e836-497c-80e0-235fb2526e71> | 2.859375 | 94 | Q&A Forum | Science & Tech. | 85.274571 |
How Did Structure Form in the Universe?
The Big Bang theory is widely considered to be a successful theory of cosmology, but the theory is incomplete. In its simplest form, the Big Bang theory assumes that matter and radiation are uniformly distributed throughout the universe and that general relativity is universally ... | <urn:uuid:dd48d675-c876-4635-afc0-df98ad7583c5> | 4.1875 | 251 | Knowledge Article | Science & Tech. | 30.488292 |
Let p(x) = x^5 + ax + b where a and b are real numbers.
a.) prove that p(x) has exactly one real root if a > 0.
b.) What is the maximum number of real roots p(x) may have? Justify your answer.
I am going to use the root-location theorem.Originally Posted by Susie38
If is countinous on and have opposite signs then there... | <urn:uuid:e3a8a76d-a8b6-4607-bcde-a045cfb0c0af> | 2.9375 | 381 | Q&A Forum | Science & Tech. | 68.871312 |
Image: A vectorA vector is an object that has a magnitude and a direction. Geometrically, we can picture a vector as a directed line segment, whose length is the magnitude of the vector and with an arrow indicating the direction. The direction of the vector is from its tail to its head.
Image file: vector.png
Source im... | <urn:uuid:6aba2f7d-572d-4ab1-8271-713f439730f6> | 3.515625 | 95 | Truncated | Science & Tech. | 48.31189 |
The latest Arctic Report Card was published yesterday at the American Geophysical Union’s Fall Meeting in San Francisco, and it makes grim reading. Apart from last summer’s new record low sea ice minimum, all the indicators of warming are pointing in the wrong direction. The Arctic is making a rapid transition to a new... | <urn:uuid:347dbdf0-a819-47b9-ad77-ce1dd9065895> | 2.9375 | 499 | Personal Blog | Science & Tech. | 38.859991 |
Meteor. As the term is commonly used, a meteor is a small celestial body that enters the atmosphere of the earth. To astronomers, however, a meteor is the streak of light such an object produces as it passes through the earth's atmosphere and the object itselfwhether in the atmosphere or in outer spaceis a meteoroid. T... | <urn:uuid:7a0ba34c-8827-486f-9305-987f4c6e2caf> | 4 | 967 | Knowledge Article | Science & Tech. | 64.400951 |
Given any collection of permutations, we define two group algebra elements.
Notice that doesn’t have to be a subgroup, though it often will be. One particular case that we’ll be interested in is
so we have a nice factorization of this element.
Now if is a tableau, we define the associated “polytabloid”
Now, as written ... | <urn:uuid:c7e68219-a737-4b55-8cd2-863e3eaac9b6> | 2.765625 | 194 | Tutorial | Science & Tech. | 45.477122 |
When Laplace's equation is expressed in terms of orthogonal curvilinear co-ordinates, it takes the familiar form
where (λ, μ, ν) are the co-ordinates, and dλ/h1, dμ/h2, dν/h3 the elements of arc in the directions in which only λ, μ, or ν respectively increase.
In the application to solids of revolution and potential pr... | <urn:uuid:bcee3209-ad43-4a4a-9185-ddfa63a6da94> | 2.78125 | 470 | Academic Writing | Science & Tech. | 34.650443 |
Science Fair Project Encyclopedia
In mathematics, a geometric progression (also inaccurately known as a geometric series, see below) is a sequence of numbers such that the quotient of any two successive members of the sequence is a constant called the common ratio of the sequence.
Thus without loss of generality a geom... | <urn:uuid:4eee6a60-15b0-4045-bb8f-34aa51cb8b2f> | 3.953125 | 972 | Knowledge Article | Science & Tech. | 83.074073 |
The large stellar association cataloged as
NGC 206 is
nestled within the dusty arms of neighboring
Andromeda (M31), 2.5 million light-years distant.
Seen near the center of
gorgeous close-up of the southwestern
Andromeda's disk, the bright, blue
NGC 206 indicate its youth.
Its youngest massive stars are less than 10 mi... | <urn:uuid:e9a0c0d5-aa9e-48b4-9271-35eee56ae1b7> | 2.953125 | 164 | Knowledge Article | Science & Tech. | 69.297262 |
Video transcript: Reindeer see a weird and wonderful world of ultraviolet light
Video shows images of Arctic reindeer, their low light habitat and an image of the 3-man team to start with, in this continuous video slideshow
Lead researcher Professor Glen Jeffery narrates
In the Arctic reindeer we have got one animal wh... | <urn:uuid:ad945dc9-fbab-4ce9-ae59-aeba3011e9ee> | 3.265625 | 932 | Audio Transcript | Science & Tech. | 51.418044 |
Earth Sciences: Year In Review 1998Article Free Pass
These earthquakes were located in almost real time by the U.S. Geological Survey (USGS) in Golden, Colo. This service, which began in 1928, made a major leap forward in 1958 when a rudimentary program was developed to calculate earthquake epicenters by computer, and ... | <urn:uuid:b538b138-288b-4c5d-b849-6c719666f7f6> | 4.125 | 1,394 | Content Listing | Science & Tech. | 36.724388 |
From the standpoint of planetary detections, the small red stars called M dwarfs are all but ideal. Their size is an advantage because radial velocity and transit methods should find it easier to pull the signature of smaller planets out of the statistical noise. Not so long ago, that wouldn’t have seemed important bec... | <urn:uuid:e1d8ebf1-4026-4707-97c6-6f9ed19c3f84> | 3.96875 | 572 | Knowledge Article | Science & Tech. | 45.055811 |
What's New Restoring an ancient Great Lakes fish WMUK – Kalamazoo, MI (5/22) Sturgeon have lived in the Great Lakes longer than humans have walked the earth, but the ancient fish now need our help to stay here. A new project is trying to do that by rebuilding habitat for lake sturgeon in Michigan’s Kalamazoo River.
Sta... | <urn:uuid:73cbc645-8d71-410d-9138-540ebbe5b96f> | 2.875 | 1,016 | Content Listing | Science & Tech. | 25.558305 |
Changing drivers of deforestation provide new opportunities for conservation
Tropical deforestation claimed roughly 13 million hectares of forest per year during the first half of this decade, about the same rate of loss as the 1990s. But while the overall numbers have remained relatively constant, they mask a transiti... | <urn:uuid:25055868-770f-4380-9127-24d5985c474a> | 3.203125 | 1,562 | Content Listing | Science & Tech. | 22.613593 |
|Register||Search||Today's Posts||Mark Forums Read|
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Different thermal conductivity of gases and liquids.
Thermal conductivity is the ability of any substance to conduct hea... | <urn:uuid:39d15e8b-9e2c-493f-b28e-e728033a861a> | 3.546875 | 637 | Comment Section | Science & Tech. | 62.199872 |
Chandrayaan-1 will map the Moon at high resolution and different wavelengths to help understand the origin and evolution of our only natural satellite. The mission will make a detailed study of the Moon's mineralogy, and will generate a digital 3D atlas of the Moon's surface. The mission will also look for water ice ar... | <urn:uuid:d37fa2d8-2495-4b6c-94eb-0e60a664155b> | 3.296875 | 470 | Knowledge Article | Science & Tech. | 30.534239 |
Laser pulses at relativistic intensities (more than 1018 W/cm2) create fast electrons which penetrate and exit the target. In case of a solid target - generally a foil- the target rear surface develops a cloud of electrons. These electrons are usually referred to as an electron sheath, and their huge electric field in ... | <urn:uuid:b2e863a7-b0ec-468c-ae99-83a8e7b0a0e0> | 3.4375 | 370 | Knowledge Article | Science & Tech. | 37.619881 |
Foraging Ecology of the Leatherback Turtle
The leatherback turtle is a powerful ocean traveler that ranges from the Arctic Circle to the edges of the Antarctic convergence zone. This unique pelagic reptile spends most of its life at sea, but females haul out onto tropical beaches every two to four years to lay their eg... | <urn:uuid:8435590d-8ca8-43fe-bbe3-b3c28d3b3ff6> | 3.921875 | 1,469 | Academic Writing | Science & Tech. | 23.501461 |
are enzymes that elongate DNA molecules by adding nucleotides to the 3' end of a strand. The typical reaction involved is a nucleophilic attack. (Abeles, 1992
Polymerases in E. coli
The primary role of DNA Polymerase I (abreviated Pol I) in DNA replication is the removal of RNA primers present on the newly replicated D... | <urn:uuid:90b7235e-e0fa-4587-a855-7d199f753010> | 3.296875 | 1,927 | Knowledge Article | Science & Tech. | 58.929896 |
This fact sheet explores the science of climate and weather through the lens of the Australian Alps. Here the various forms of precipitation are described as well as past, present and projected future weather patterns.. Ozone depletion, ultra violet radiation and climate change are also explored. A glossary and list of... | <urn:uuid:419349c3-5e6e-4b06-a86c-81c0c73fe282> | 3.265625 | 231 | Content Listing | Science & Tech. | 50.385 |
|Every programmer has his or her opinion as to what information should be included with the program code. Most programmers add comments with their code in order to remind themselves, and anyone else, what the code does and how it does it. When deciding what information to include ask yourself what you would need to be ... | <urn:uuid:464b2b8f-5810-4c02-af39-f83ed9697b00> | 2.90625 | 138 | Truncated | Software Dev. | 57.629268 |
Reinhardt’s scholarship focuses on the history of industrial research, the emergence of instrumentation, and chemistry’s links to physics, biology, medicine, and technology.
Join us for a tasty history lesson in the art and science of re-creating Revolutionary-era ales.
From Chemical Heritage
Conflicts in Chemistry: Th... | <urn:uuid:779054ba-7f1a-493c-869c-0b0e017992a4> | 2.6875 | 207 | Content Listing | Science & Tech. | 25.920172 |
Before Einstein, it was known that a beam of light pushes against matter; this is known as radiation pressure. This means the light has momentum. A beam of light of energy E has momentum E/c. Einstein used this fact to show that radiation (light) energy has an equivalent mass.
Consider a cylinder of mass M (see accompa... | <urn:uuid:ce2ddfef-01e2-48c8-93f9-1df4e35b7b95> | 4.28125 | 479 | Knowledge Article | Science & Tech. | 63.031974 |
Not quite. We’d have to get out of Earth first. In a billion years, our Earth would no longer be habitable.
Our best option, according to Ray Villard, news director for the Hubble Space Telescope, is for us to
… come up with a strategy to build artificial mini-planets – essentially flying city-states — that would modif... | <urn:uuid:c6a795a1-04e0-44a6-b763-66b54fc39a7d> | 2.90625 | 192 | Personal Blog | Science & Tech. | 52.709728 |
Bartusiak, Marcia F., Burke, Barbara, Chaikin, Andrew, Greenwood, Addison, Heppenheimer, T.A., Hoffman, Michelle, Holzman, David, Maggio, Elizabeth J., Moffat, Anne Simon. "6 Clocks in the Earth? The Science of Earthquake Prediction." A Positron Named Priscilla: Scientific Discovery at the Frontier. Washington, DC: The... | <urn:uuid:e31b11c8-c9b6-4592-b5af-869bb1ce1b49> | 3.203125 | 486 | Truncated | Science & Tech. | 45.689082 |
The speed of sound is a term used to describe the speed of sound waves passing through an elastic medium.
The speed varies with the medium employed (for example, sound waves move faster through water than through air), as well as with the properties of the medium, especially temperature.
The term is commonly used to re... | <urn:uuid:3f3d9fbf-8d45-44cc-ae23-ae5bc9925345> | 4.3125 | 262 | Knowledge Article | Science & Tech. | 45.407049 |
We ran into a problem at first with our plots when we plotted the mean versus the variance of our data and we found that it was not linear like we expected it to be. After some thought, we found that the variance of one of our images does not show the true variance in the data since the image itself has low and high in... | <urn:uuid:b0131c19-cc7a-423a-b262-4456c803fb28> | 3.46875 | 197 | Academic Writing | Science & Tech. | 50.875261 |
Astronomers have announced the discovery of a planet with about three times the Earth’s mass orbiting the nearby red dwarf star Gliese 581. That in itself is cool news; a planet like that is very hard to detect.
But the amazing thing is that the planet’s distance from the star puts it in the Goldilocks Zone: the region... | <urn:uuid:8269e4a4-730b-498f-906c-5078bf0480a6> | 3.421875 | 309 | Personal Blog | Science & Tech. | 59.1655 |
3.9.1 Fundamental types
6 Values of type bool are either true or false.*42) [Note: there are no signed, unsigned, short, or long bool types or values. ] As described below, bool values behave as integral types. Values of type bool participate in integral promotions (4.5).
*42) Using a bool value in ways described by th... | <urn:uuid:044168cd-19f4-48a1-b2ed-99271332b3dd> | 2.90625 | 162 | Documentation | Software Dev. | 53.669672 |
Figure 4.15.7 illustrates the conformal mapping of the strip onto the whole -plane cut along the real axis from to −1 and 1 to , where and (principal value). Corresponding points share the same letters, with bars signifying complex conjugates. Lines parallel to the real axis in the -plane map onto ellipses in the -plan... | <urn:uuid:51e2b5fc-c516-4257-8398-f31fd0fb2100> | 3.25 | 169 | Documentation | Science & Tech. | 45.821061 |
NASA will hold a news conference at 11 a.m. PST on Thursday, Dec. 2, to discuss an astrobiology finding that will impact the search for evidence of extraterrestrial life.
After much speculation, what we all now know was revealed at the press conference:
Researchers conducting tests in the harsh environment of Mono Lake... | <urn:uuid:d9071274-ff4f-499c-9c78-013732b06be8> | 3.21875 | 1,190 | Personal Blog | Science & Tech. | 51.963574 |
||This article needs additional citations for verification. (February 2010)|
A mathematical joke is a form of humor which relies on aspects of mathematics or a stereotype of mathematicians to derive humor. The humor may come from a pun, or from a double meaning of a mathematical term, or from a lay person's misundersta... | <urn:uuid:da443479-1c20-4758-8e26-98e30c4de9fc> | 3.265625 | 2,169 | Knowledge Article | Science & Tech. | 51.543102 |
This article has been moved to the location below
Music is what feelings sound like! Friday, Sep 7 2007
Nuclear Ice Age? Sunday, Jun 3 2007
ancient and atomic bombs and fission and fusion and gurudev and half life and hitxp and ice age and iceage and India and indian and laser and Mahabharat and mahabharatha and nuclea... | <urn:uuid:f8ec3d8b-91e5-4f88-807e-e71625c38ea0> | 2.84375 | 899 | Personal Blog | Science & Tech. | 48.239556 |
Interspersed amongst the sprawling urban development of southern California are remnants of a once-widespread habitat type, coastal sage scrub. This semi-arid habitat is home to nearly 100 species that are either endangered, threatened, or of conservation concern, including the secretive and declining Southern Californ... | <urn:uuid:595103b7-b621-4e43-a38b-1e4f9c331e0e> | 3.4375 | 1,192 | Academic Writing | Science & Tech. | 28.134003 |
It described a 4 p.m. heavy gale that increased to a perfect hurricane wind, with the shifting of winds by noon the next day. The shift of winds from the northeast to the northwest told Mock that the storm track passed to the east of the Rebecca.
Using the logs and protests, Mock was able to correlate the precise locat... | <urn:uuid:202a668a-0cf3-4572-907f-cd936a7e3d40> | 3.484375 | 302 | Knowledge Article | Science & Tech. | 56.968503 |
This little freshwater snail, probably a Helisoma sp., created a record of its movement in the fine sediment layer covering the rocks on the bottom of a shallow pool next to a creek.
Bioturbation is the disturbing and mixing of soils and sediments by organisms that live or feed in them or simply pass thru them. It is a... | <urn:uuid:3bec6e3c-5a19-468f-98f7-b44ae6e17697> | 3.859375 | 622 | Personal Blog | Science & Tech. | 46.429282 |
Dr. Joan Girona of the Institute of Agroalimentary Research and Technology in Catalonia, Spain, studies irrigation and the water and nutrient needs of fruit trees. In a recent study, he wanted to measure the absorption of photosynthetically active radiation (PAR) for use in analyzing growth and fruit production issues.... | <urn:uuid:99c08aa2-2d92-4800-8ab8-02c181b83d3b> | 3.625 | 444 | Knowledge Article | Science & Tech. | 39.530393 |
Conversion of values to readable Strings.
Minimal complete definition: showsPrec or show.
Derived instances of Show have the following properties, which are compatible with derived instances of Text.Read.Read:
* The result of show is a syntactically correct Haskell expression containing only constants, given the fixity... | <urn:uuid:b4a1f314-e266-4a8e-adba-439600cf5de3> | 3.46875 | 962 | Documentation | Software Dev. | 55.417476 |
|Contents||Inline elements, block-level elements|
|Contained in||Inline elements, block-level elements|
The DEL element contains content that has been deleted. This element is useful in marking changes from one version of a document to the next. Through style sheets, authors can suggest an appropriate rendering, such a... | <urn:uuid:cf85b83c-cd57-4fc3-9923-a54d3677247c> | 3.53125 | 509 | Documentation | Software Dev. | 70.382455 |
Since the last post, the neutron generator has been set-up and checked to see that it works. So what to do with it next? Throw it into a swimming pool!
We plan to run the neutron generator under 5 metres (16ft) of water next to XENON1T, see the figure. For XENON1T, the water acts for two purposes: to shield the detecto... | <urn:uuid:c76285ab-55d8-4b6b-a4a6-8611fc5d14c0> | 2.8125 | 453 | Personal Blog | Science & Tech. | 60.489737 |
- Chemists cross-link carbon nanotubes to form thin mats
One of the most innovative developments to come from the discovery of carbon nanotubes is that of nanotube paper and thin films. 'Black paper' is now commercially available for the next generation of high-tech electronics.
Steve F. A. Acquah, Darryl N. Ventura an... | <urn:uuid:64ef31a1-d607-46f1-86cf-1585b04a0276> | 3.453125 | 2,365 | Academic Writing | Science & Tech. | 39.884611 |
A left to right algorithm for squaring 1.7 would look like
This illustrates the formula for squaring a binomial
The 2ab are the two .7 in blue in the computation.
If we use this technique to verify the next decimal place we get
In this case, we can let a = 1.7; because we know from the previous step that 1.72 = 2.89. I... | <urn:uuid:a4f99913-6886-489e-b167-298568e6a0a6> | 3.359375 | 275 | Tutorial | Science & Tech. | 99.121799 |
The Pleurastrophyceae comprises less than a dozen genera and a handful of species. The group is not as well-defined as the other groups of green algae, because it was first recognized as a group only in 1984. What makes the group distinctive is the way in which the cells divide during mitosis.
Pleurastrophyceans have a... | <urn:uuid:97899fe3-3b20-4bf3-b183-eca541dc3491> | 3.71875 | 453 | Knowledge Article | Science & Tech. | 39.75375 |
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Mars rovers are starting to generate less power.
The Mars rovers are starting to generate less power these days because Mars is starting to slip into Winte... | <urn:uuid:f8171dd1-2d46-4c72-842b-591f1805056f> | 3 | 432 | Content Listing | Science & Tech. | 51.847073 |
On Earth, certain conditions in our atmosphere give rise to powerful storms - thunderstorms, blizzards, tornadoes, hurricanes, and the like. The Sun also has an atmosphere, and incredible storms that dwarf Earthly storms (in terms of the vast amounts of energy involved). Sometimes they blast forth from the Sun's surfac... | <urn:uuid:03c1f682-0345-4446-9b7e-c4c53ab4565f> | 3.734375 | 561 | Knowledge Article | Science & Tech. | 43.349872 |
Here are two minimal example programs using the TCP/IP protocol: a server that echoes all data that it receives back (servicing only one client), and a client using it. Note that a server must perform the sequence socket(), bind(), listen(), accept() (possibly repeating the accept() to service more than one client), wh... | <urn:uuid:d69bbd42-579d-4267-9e73-f9d5e5149da0> | 3.09375 | 314 | Documentation | Software Dev. | 71.399839 |
Sponges are sessile organisms that attach to a firm substrate. There are about 30 species of freshwater sponges in North America, all belonging to the family Spongillidae. Sponges typically live in still waters, and are found regularly in larger rivers, lakes, wetlands, and in streams near lake outlets. They have simpl... | <urn:uuid:1888b695-28dd-48d1-9d5c-42b46bae46bf> | 4.21875 | 243 | Knowledge Article | Science & Tech. | 27.973763 |
Our sun is alone in space; it is a single star 4.26 light years away from its closest stellar neighbour (α Proxima Centauri). For many other stars this is not the case, it has been estimated that between 50%– 66% of all stars are in binary (a two star system) or even larger multiple star systems (with more than two sta... | <urn:uuid:3a122acf-ec5f-4e5c-b07a-6a18667badf1> | 4.03125 | 1,768 | Knowledge Article | Science & Tech. | 45.951276 |
Morriën, W.E. and Engelkes, T. and Macel, M. and Meisner, A. and Van der Putten, W.H. (2010) Climate change and invasion by intracontinental range-expanding exotic plants: the role of biotic interactions. Annals of Botany, 105, 843-848. ISSN 0305-7364.
Restricted to KNAW only
Official URL: http://dx.doi.org/10.1093/aob... | <urn:uuid:389a5d95-e250-442b-bb5a-925bdb877957> | 2.703125 | 467 | Academic Writing | Science & Tech. | 33.817279 |
A: Dragging an image is a multistage process where one has to first erase the image previously drawn then move the coordinates of the image to a new position and finally redraw the image at the new position. Apart from that, one has to handle the mouse messages 'WM_LBUTTONDOWN', 'WM_MOUSEMOVE' and 'WM_LBUTTONUP'. Here ... | <urn:uuid:fd6a4314-d96b-44a3-ae09-2eb985365cc5> | 2.90625 | 309 | Q&A Forum | Software Dev. | 41.580096 |
There are two elements to why the universe appears to be so orderly: the physical laws of that govern the universe are the same everywhere, and astronomical objects are very, very, very far from each other.
Consider two objects, one much larger than the other, and both very far from anything else. Because of gravity (w... | <urn:uuid:d34e7287-404a-4386-b45b-d4312fa7fda7> | 3.28125 | 1,029 | Q&A Forum | Science & Tech. | 35.96657 |
Manipulating Clouds from the Ground
Cloud seeding is partly a science, partly a black art.
This segment is part of the Engineers of the New Millennium: The Global Water Challenge Special Report.
Transcript: Nevada's Cloud Wranglers
Tom Swofford: Once the solution flow starts to go, you'll actually be able to see the fl... | <urn:uuid:69154b5e-f811-4fd7-b44b-e80963322417> | 3.09375 | 1,128 | Audio Transcript | Science & Tech. | 73.921356 |
Spiders / Scorpions: Spiders Jump With Deadly Accuracy in Green Light
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© 2012 National Geographic; some video courtesy Science/AAAS
Spiders Jump... | <urn:uuid:4615b6bb-12eb-45e6-8283-c35188326941> | 2.75 | 132 | Truncated | Science & Tech. | 44.299588 |
Photosynthesis Problem Set 1
Problem 4 Tutorial: Result of electron transport
During photosynthetic electron transport, the interior compartment of the thylakoid membranes becomes:
|| The thylakoid membranes are sac-like structures with a lipid bilayer separating the interior compartment from the stroma. Enzymes of pho... | <urn:uuid:70fcc09c-e96f-44b3-a9f4-6f9ccc56dd89> | 3.375 | 196 | Tutorial | Science & Tech. | 20.760625 |
Experts in Emulsions
Colloids formed by the combination of two immiscible liquids such as oil and water. Lipid-in-water emulsions are usually liquid, like milk or lotion. Water-in-lipid emulsions tend to be creams. The formation of emulsions may be aided by amphiphatic molecules that surround one component of the syste... | <urn:uuid:d3d4eb0e-2ce2-462f-8182-e9ca700ab45a> | 3.09375 | 86 | Knowledge Article | Science & Tech. | 40.042857 |
This is an drawing of the Galileo probe exploring Jupiter's environment.
Click on image for full size
Image from: The Jet Propulsion Laboratory
The Atmosphere of Icy Moons
The icy moons have no atmosphere. The reason they have no atmosphere is because they do not have enough gravity. The smaller the body is the lower i... | <urn:uuid:9b107d08-ad4e-4197-b40b-2f37c8f1b321> | 3.84375 | 557 | Content Listing | Science & Tech. | 56.677192 |
September 13, 2012 by Administrator
The basic idea of the KUKA youBot API is to represent a robot system as a combination of decoupled functional sub-systems. That is, this API represents manipulator arm and base platform as the combination of several joints. At the same time each joint is defined as a combination of a... | <urn:uuid:353e6c96-ea14-480b-98d2-058e6fd0b1ad> | 2.953125 | 690 | Documentation | Software Dev. | 42.640639 |
The following particular features are also provided:
- encode into lines of a given length (#b64encode)
- decode the special format specified in RFC2047 for the representation of email headers (decode_b)
A simple encoding and decoding.
require "base64" enc = Base64.encode64('Send reinforcements') # -> "U2VuZCByZWluZm9y... | <urn:uuid:e643b5f3-092b-4061-8ced-50e3934bfa6e> | 3.390625 | 321 | Documentation | Software Dev. | 40.5055 |
|weak interaction or weak force|
|physics interaction See electroweak interaction weak nuclear interaction, Also called: weak nuclear force an interaction between elementary particles that is responsible for certain decay processes, operates at distances less than about 10--15 metres, and is 1012 times weaker than the ... | <urn:uuid:e88ef8f3-16d1-47bd-85a0-aa6118291127> | 3.59375 | 260 | Structured Data | Science & Tech. | 30.349928 |
Whitney embedding theorem
- The strong Whitney embedding theorem states that any smooth real m-dimensional manifold (required also to be Hausdorff and second-countable) can be smoothly embedded in the real 2m-space (R2m), if m > 0. This is the best linear bound on the smallest-dimensional Euclidean space that all m-dim... | <urn:uuid:98333d40-eea9-4be4-9fce-b074712bb1a2> | 2.953125 | 1,911 | Knowledge Article | Science & Tech. | 58.779694 |
Slide 3 of 13
What is Aerosol Single-Scattering Albedo?
- w0 = a measure of the amount of aerosol light extinction due to scattering
- We periodically switch a 1-micrometer impactor in line to remove supermicron aerosols. This talk will focus on the submicron aerosols. Most of the absorption occurs here.
- Heat to main... | <urn:uuid:40534cc7-8a35-41e9-953b-207a98a48933> | 3.046875 | 128 | Truncated | Science & Tech. | 45.91 |
How can you calculate the closest point(s) between
two circular orbits which are not in the same plane or orientation?
I have not looked at this specific problem but the general approach is as
follows. If you have the equations of the two orbits, you can write an
equations describing the distance between two arbitrary ... | <urn:uuid:c2aea030-f0f8-4aeb-a55b-290d430b3750> | 2.75 | 167 | Q&A Forum | Science & Tech. | 57.521824 |
Rotational Speed and Orbital Parameters
If we could change the rotational speed of the moon, would
this momentum change necessarily change its orbital parameters?
In the short run, giving the Moon a spin would not affect its orbit around the Earth.
In the long run, the energy of that spin might gradually be
transferred... | <urn:uuid:195cd5e1-893b-4fc9-9978-df4610b91e77> | 3.421875 | 317 | Q&A Forum | Science & Tech. | 47.622467 |
The Spider Assassin (Archaeidae)
As the sun sets, the high pitched buzz of cicadas winds down and a chorus of frogs greet the night. An array of insects and animals with adaptations and appearance so bizarre as to be almost incredulous emerge. Amongst the oddest are the Archaeids.
These strange spiders go by a variety ... | <urn:uuid:2f34fd17-713a-4394-ae85-fe16521e8822> | 3.203125 | 2,554 | Academic Writing | Science & Tech. | 37.556985 |
Take a look at the following pictures of U.S. dimes. As you can see, they are slightly different from one another — the date is in the incorrect spot on one of them. Can you tell which one is “wrong”?
Let’s make this a poll:
Don’t look at your pocket change before you answer! In case you don’t have a dime handy, I’ll r... | <urn:uuid:ad84c8c2-489a-4023-8cf2-18443327e9ea> | 2.734375 | 894 | Personal Blog | Science & Tech. | 60.197428 |
Wednesday, June 20
David Gruber, an assistant professor of biology at Baruch College and research associate at the American Museum of Natural History, is leading a National Geographic Society/Waitt Institute expedition exploring bioluminescent and biofluorescent marine animals in the Solomon Islands.
It’s 3:53 p.m., an... | <urn:uuid:ab42ed45-ea52-4c64-a353-bb9efca8926c> | 2.9375 | 887 | Personal Blog | Science & Tech. | 30.098377 |
The Brown Bear
The brown bear and grizzly bear are technically one in the same. This amazingly large animal has a reputation as a killer.
The brown bear comes from a family of bears known as "Ursidae." A variety of races and species of this long feared bear are native to Eurasia and the northwestern regions of the Unit... | <urn:uuid:6713a719-844a-44f6-b3a4-6545bc4417f5> | 3.21875 | 963 | Knowledge Article | Science & Tech. | 59.56686 |
|What if you saw your shadow on Mars and it wasn't human?
Then you might be the robotic
Curiosity landed in
Gale Crater last August and has been busy looking for signs of ancient running water and clues that Mars could once have harbored life.
Curiosity has taken a wide panorama that includes its own shadow in the dire... | <urn:uuid:7fc46e13-795f-47e6-aa03-77a3a70fc89b> | 3 | 135 | Truncated | Science & Tech. | 47.207064 |
We had one data file, there was no sequence problem
for retrieving the data without order by clause.It was in sequence.
When we added another datafile and index file.
Now when program retrieves the data(no order by
it does not come in sequence. e.g if order numbers are
123456, then it retrieves as 123654.Even I run a
s... | <urn:uuid:464ec6e4-5e37-44e7-8ea3-d5f825f48fd7> | 2.71875 | 496 | Comment Section | Software Dev. | 61.217667 |
Once upon a time (in the 1960s), the term ‘hacker’ was used to denote a person particularly skilled in a technical area, usually programming. At the same time, “cracker” was used for people who attacked computer systems. This was a niche usage, and consigned mostly to MIT (where the term hacker originated) and its alum... | <urn:uuid:687ff4bd-ae27-4093-86ec-4f88c6d85336> | 3.234375 | 965 | Personal Blog | Software Dev. | 59.433875 |
This page is maintained by
All content Copyright © The University of Reading unless otherwise stated.
This page outlines the some of the work that has been done or is in progress in the Radar Group.Note: the information on this page is rather old, and needs updating.
The main interest in clouds stems from their strong ... | <urn:uuid:d5caa585-b502-404e-8792-a9e126a2242f> | 2.6875 | 627 | Content Listing | Science & Tech. | 23.373696 |
British physicist David Tyler on growing doubts about Darwinism in fruit flies
This empirical work is worth noting on two counts. First, we are here considering a mechanism that is central to Darwinian evolution. Positive natural selection of hereditable variation is the key (we are informed) to understanding how desce... | <urn:uuid:30ce4d15-5b6f-41fa-bb30-ad1f19324bba> | 3.046875 | 362 | Personal Blog | Science & Tech. | 30.023319 |
JSON is a new human readable data format that has become very popular in the last few years, especially in web development.
JSON is very similar to XML. They both try to solve the same problem by creating a simple, human readable format for storing data. Up until recently, XML was used for any type of system that neede... | <urn:uuid:ec387919-612f-4839-8b09-8238ce249eeb> | 2.84375 | 656 | Personal Blog | Software Dev. | 64.002576 |
|IUPAC name||Diisobutylaluminium hydride|
|Other names||DIBAH; DIBAL; DiBAlH; DIBAL-H; DIBALH|
|Molecular formula||C16H38Al2 (dimer)|
|Molar mass||142.22 (monomer)|
116–118 °C/1 mmHg
|Solubility in water||hydrocarbon solvents|
|Main hazards||ignites in air|
| Except where noted otherwise, data are given for|
materials ... | <urn:uuid:d2e23a80-5ca6-4442-a9e1-7dff13ba0a64> | 2.90625 | 911 | Knowledge Article | Science & Tech. | 38.186342 |