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
values | topic large_stringclasses 2
values | fr_ease float64 20 157 |
|---|---|---|---|---|---|---|
Space is three-dimensional... or is it? In fact, we are all used to living in a curved, multidimensional universe. And a mathematical argument might just explain how those higher dimensions are hidden from view.
A bizarre set of of 8-dimensional numbers could explain how to handle string-theory's extra dimensions, why ... | <urn:uuid:18bf156b-691c-4c6d-8b31-cb2137ad78a6> | 3.265625 | 187 | Truncated | Science & Tech. | 45.262217 |
Identifying and cataloging biological diversity is challenging. One way to do go about IDing all the life forms is to sequence a known region of the genome in all those species. This is known as DNA barcoding. An article in PNAS reports on the DNA sequence of a gene found useful for DNA barcoding in plants. In a review... | <urn:uuid:6ca4e7fc-9d6d-406a-897a-2ed6c9eb6167> | 3.296875 | 217 | Personal Blog | Science & Tech. | 51.896838 |
November 11, 2008 2 Comments
Architecture Pattern – It expresses a fundamental structural organization or schema for software systems. It provides a set of predefined subsystems, specifies their responsibilities, and includes rules and guidelines for organizing the relationships between them.
This article details the v... | <urn:uuid:4e9a41dd-5b94-484d-aef0-5f4030f2ebde> | 3.734375 | 269 | Personal Blog | Software Dev. | 20.668774 |
The DTD of TEI P3 defines a large number of element types, with a wide variety of meanings. In addition, it defines one element (<seg>), which has no specified meaning. The <seg> element may be used:
The <seg> element can be used only for phrase-level elements, because <seg> is a member of class phrase. It thus can app... | <urn:uuid:92ca8a0d-d126-49d0-940e-c85d3721d05d> | 3.109375 | 1,502 | Documentation | Software Dev. | 65.076986 |
'Wave Structure of Matter'
Wave Structure of Matter (WSM) is the idea that matter is a purely wave phenomenon and can be understood as spherical standing waves and is therefore made of the same stuff as light. It is suggested that all pages/articles to do with WSM are named with Wsm followed by whatever it is about beg... | <urn:uuid:9e9fdac3-516d-4067-80b3-4cb939860282> | 2.84375 | 463 | Content Listing | Science & Tech. | 40.326434 |
Resonance energy transfer
resonance energy transfer --> fluorescence energy transfer
(Science: technique) transfer of energy from one fluorochrome to another. The emission wavelength of the fluorochrome excited by the incident light must approximately match the excitation wavelength of the second fluorochrome.
Results ... | <urn:uuid:bafde75c-e855-4357-a3a0-1266d86c41ec> | 3.265625 | 116 | Structured Data | Science & Tech. | 22.408333 |
This year's Atlantic hurricane season is expected to be busier than usual and the 2011 summer forecast calls for some extreme weather. Heidi Cullen makes the climate connection.
In different parts of the American West, climate influences wildfires in unexpected ways.
Reactor accidents and radiation leaks aren't the onl... | <urn:uuid:e9ba8b95-6ff9-49e9-9c2e-f72507ce968f> | 2.71875 | 220 | Content Listing | Science & Tech. | 56.996259 |
A helicase protein moves rapidly on highly flexible single-stranded DNA track, using power provided by ATP hydrolysis. Once the helicase encounters a physical blockade that it cannot surmount, a conformational change in the helicase protein results in the recruitment of the initial site on the DNA, forming a loop. The ... | <urn:uuid:5854116c-4d19-4e30-8b99-e38ffba477c2> | 2.953125 | 108 | Knowledge Article | Science & Tech. | 27.014485 |
Despite their ubiquity as research tools, there is still much we don’t fully understand about bacteria — such as how they divide. Learning more could point the way to new desperately needed antibiotics.
with red bands of FtsZ
September 2012--Antibiotics work in a variety of ways. Some destroy the bacterial protein synt... | <urn:uuid:76688a6e-289a-4299-9a19-67381891f2d0> | 3.53125 | 1,439 | Nonfiction Writing | Science & Tech. | 37.045698 |
The term acid rain is commonly used to mean the deposition of acidic components in rain, snow, fog, dew, or dry particles. The more accurate term is acid precipitation. "Clean" or unpolluted rain is slightly acidic, because carbon dioxide and water in the air react together to form carbonic acid, a weak acid. Rain acqu... | <urn:uuid:b5090c8a-41c7-4a24-89be-d39ed92aa867> | 3.859375 | 2,637 | Knowledge Article | Science & Tech. | 45.123593 |
Planets and their moons have collided with asteroids and comets frequently throughout our solar system's 4.5-billion-year history. Some of these impacts can be so powerful that they blast huge craters into the Earth's surface, generating enough heat to vaporise the crashing object.
The Earth is struck by extraterrestri... | <urn:uuid:adacbea1-a8f4-4b9b-8930-0e8e9b11c190> | 4.4375 | 448 | Knowledge Article | Science & Tech. | 53.943182 |
In my last post, I discussed how scientists have been able to prove that the increase in carbon dioxide in the atmosphere is due to human activity. It’s now time to discuss why carbon dioxide matters. Below is a chart from the IPCC of radiative forcings, which I explain below.
Before I can explain forcings, there is an... | <urn:uuid:f5c19fa8-4ad3-42ea-a33d-cb6e05eae3f5> | 3.8125 | 945 | Personal Blog | Science & Tech. | 48.136245 |
outstanding problem in the oceanic sciences is the rate of heat and
freshwater transport from the equator to the poles, for it is this
transport which powers the Earth's weather and climate system."
Keffer and Holloway, Nature (1988).
MOCHA is a collaborative project, partnered with the UK RAPID
Program, to measure the... | <urn:uuid:34a9b561-4add-465a-99cf-188f5047f107> | 3.15625 | 403 | Knowledge Article | Science & Tech. | 48.129646 |
Predators & Plants
April 26, 2012
Eliminating bears, wolves, and other top predators has far-reaching consequences.
BOB HIRSHON (host):
How predators protect plants. I’m Bob Hirshon and this is Science Update.
(SFX: Wolf howl)
The howl of the wolf isn’t heard as much as it used to be, and as a result, prey like moose, ... | <urn:uuid:47b3d10b-571f-49e2-8c15-5bb0c29965ed> | 3.234375 | 277 | Truncated | Science & Tech. | 52.687727 |
This is certainly the first question you will find asked anytime someone mentioned the term “biomass.” Out of all of the various alternative energy sources being talked about out there, from solar and wind, to water and nuclear, the one that most people on average know the least about is biomass. So what is biomass? Th... | <urn:uuid:af053203-0ba3-43aa-8548-26f55082d4fb> | 3.375 | 1,689 | Knowledge Article | Science & Tech. | 60.131578 |
Subscribe to the Podcast
A collection of videos produced by the DNALC, highlighting key topics and recent projects.
A DNA barcode is a DNA sequence that uniquely identifies each species of living thing. Dr. Mark Stoeckle from The Rockefeller University talks about the history of DNA barcoding, from the first paper publ... | <urn:uuid:b1ba53fc-9650-44b0-b273-922934b8fa69> | 3.09375 | 111 | Truncated | Science & Tech. | 43.271765 |
Theory has suggested that the West Antarctic Ice Sheet may be inherently unstable. Recent observations lend weight to this hypothesis. We reassess the potential contribution to eustatic and regional sea level from a rapid collapse of the ice sheet and find that previous assessments have substantially overestimated its ... | <urn:uuid:8bd19454-c3a7-4436-8327-b2a5267e4993> | 2.9375 | 376 | Academic Writing | Science & Tech. | 46.6051 |
Sample Assignment: Writing a Web Server
The goal of this assignment is to build a functional web server. This assignment will guide you through you the basics of distributed programming, client/server structures, and issues in building high performance servers.
Before beginning this experiment, you should be prepared w... | <urn:uuid:2b8a58f9-52df-432a-8d54-89fde105f2f4> | 2.859375 | 2,618 | Tutorial | Software Dev. | 63.697082 |
May 4, 2011: Einstein was right again. There is a space-time vortex around Earth, and its shape precisely matches the predictions of Einstein's theory of gravity.
Researchers confirmed these points at a press conference today at NASA headquarters where they announced the long-awaited results of Gravity Probe B (GP-B).
... | <urn:uuid:ca2f8ca5-bad7-4cc8-b81a-483c4cac5318> | 2.796875 | 185 | Truncated | Science & Tech. | 45.563782 |
The arrival of the third decade of X-ray astronomy midway through the ROSAT mission coincided with advances in CCD detector technology that have allowed a vast increase in the power of X-ray spectroscopy. These advances, coupled with nested-mirror systems, mark a clear maturing in the field and a move away from large s... | <urn:uuid:0de7d0f6-517c-437f-a709-0013daba7bf2> | 3 | 1,443 | Academic Writing | Science & Tech. | 56.388768 |
Copyright © University of Cambridge. All rights reserved.
A bicycle passes along a path and leaves some tracks.
Is it possible to examine the curve of the individual tracks (both tyres have identical tread) and from them say which track was made by the front wheel and which by the back wheel?
Is it possible to say in w... | <urn:uuid:6707279a-b795-4b10-b856-0bef1f771f7a> | 2.75 | 107 | Q&A Forum | Science & Tech. | 54.822043 |
Earth at Perihelion
Earth at Perihelion On January 4, 2001, our planet made its annual closest
approach to the Sun.
January 4, 2001 -- This morning at 5 o'clock Eastern Standard time (0900 UT) Earth made its annual closest approach to the Sun -- an event astronomers call perihelion. Northerners shouldn't expect any rel... | <urn:uuid:78b61413-86fa-4f84-869b-bedbb5f15307> | 3.90625 | 1,382 | Knowledge Article | Science & Tech. | 47.371617 |
Guest post by Bob Tisdale
There are numerous blog posts and discussions about how the GISS global temperature anomaly product GISTEMP differs from the Hadley Centre and NCDC datasets.
The repeated reasons presented for this are, GISS uses 1200km radius smoothing to fill in the areas of the globe with sparse surface tem... | <urn:uuid:bc9d1746-0d2b-42a0-b5d9-c9d97fa74664> | 2.984375 | 2,306 | Personal Blog | Science & Tech. | 40.692408 |
Science Fair Project Encyclopedia
Standard conditions for temperature and pressure
Temperature and air pressure can vary from one place to another on the Earth, and can also vary in the same place with time. These values, however, are very important in many chemical and physical processes, in particular with regard to ... | <urn:uuid:4ab2406d-92ef-4cee-810a-c894e5039c6f> | 3.8125 | 460 | Knowledge Article | Science & Tech. | 42.991609 |
Physics Tip Sheet #69, June 28, 2007
American Physical Society
Highlights in this Issue: the first heat transistor, remote controlled nanomachines, high performance energy storage, and the physics of crash landing on sand.
The First Heat Transistor
J. Pekola et al.
Remotely controlled nanomachines
M. J. Comstock et al.... | <urn:uuid:a4d72fc7-782f-4ec9-abaf-f01904bbd0db> | 3.09375 | 528 | Content Listing | Science & Tech. | 25.750173 |
Plants in Hawaii
This is an abridged version of the site developed by Dr. Clifford W. Smith, email@example.com. (Sponsored by the Botany Department and the National Park Service Cooperative Park Studies Unit of the University of Hawaii at Manoa.) The full version of this site can be found at Hawaiian Alien Plant Studie... | <urn:uuid:c0e2da11-9cc7-4658-bde3-4ec394927ab6> | 2.984375 | 158 | Content Listing | Science & Tech. | 39.421394 |
The Atlantic Meridional Overturning Circulation (AMOC) is a major current in the Atlantic Ocean, characterized by a northward flow of warm, salty water in the upper layers of the Atlantic, and a southward flow of colder water in the deep Atlantic. The AMOC is an important component of the Earth’s climate system.
|Topog... | <urn:uuid:1545c247-9f0a-4ab1-936e-803dfb1cb901> | 3.875 | 2,626 | Knowledge Article | Science & Tech. | 34.944694 |
When we are talking about uploading of file, we mean to say upload file physically and save into a particular location in server. We can also upload file that means save file into database. Let us first examine how we can upload file physically in a particular location in server. The code snippet has been written in c#... | <urn:uuid:ee438a7d-eba5-472b-9c80-de27edc42389> | 3.03125 | 627 | Tutorial | Software Dev. | 48.784818 |
It's the news rain fans, snow fans, and skiers love to hear: La Nina conditions have officially formed, meaning perhaps a cool and wet/snowy winter is in the offing around here.
NOAA made the announcement Thursday in regards to their forecast update to the Atlantic Hurricane season, but for the Pacific Northwest where ... | <urn:uuid:23b476bc-5054-4c07-83bd-e3d4f832e03d> | 2.734375 | 876 | Personal Blog | Science & Tech. | 58.75505 |
Sexes are separate. During copulation the male mounts the shell of the female and inserts the penis under the lip of her shell and into the pallial oviduct. Mating may last for several hours. Sperm are transferred to the copulatory bursa, and later pass to another storage sac, the seminal receptacle, where they can sur... | <urn:uuid:a82db71e-33d4-42cf-863e-9a7222e93dec> | 3.34375 | 354 | Knowledge Article | Science & Tech. | 47.362965 |
The Teaching of Quantum Mechanics
This World Wide Web page written by
Oberlin College Physics Department;
last updated 18 January 2005.
These World Wide Web pages present tips and techniques that I have
found useful in teaching junior-senior level quantum mechanics courses.
In the flood of details, it is often hard to ... | <urn:uuid:f4471547-77d4-4150-97af-aff1f21ae2fd> | 3.203125 | 528 | Content Listing | Science & Tech. | 45.377967 |
Here's how the circuit works: Electrons, here known as surface plasmons, oscillate on tiny molecules called nanoparticles. These plasmons act as a 'super lenses,' which gather all solar light hitting the circuit. Once the light's collected, the particles pose as electrodes to ferry away the electricity for a device to ... | <urn:uuid:19186cd3-0d30-49c9-b951-052ca8a165ab> | 4.3125 | 316 | Knowledge Article | Science & Tech. | 31.21486 |
Hadrosaurus is a hadrosaurid dinosaur genus.
In 1858, a skeleton of a dinosaur from this genus was the first full dinosaur skeleton found in North America, and in 1868 it became the first ever mounted dinosaur skeleton.
Hadrosaurus foulkii is the only species in this genus.
For more information about the topic Hadrosau... | <urn:uuid:99285f40-1c3d-4031-9f23-2bd01d4097d4> | 3.078125 | 114 | Knowledge Article | Science & Tech. | 34.255 |
[If you cannot see the flash video below, you can click here for a high quality mp4 video.]
Interviewee: John Rogers, University of Illinois Urbana Champaign
All Eyes on Science
By Heather Mayer
A new digital camera not only resembles a human eye, it works like one too. Researchers mimicked the human eye’s curvature to... | <urn:uuid:aae8a5b2-bff5-4d2a-a877-44dbd8b8e0ae> | 3.40625 | 610 | Truncated | Science & Tech. | 33.787737 |
The Sun varies on time scales of minutes to decades, and most likely longer. The relative energy content, i.e. the change in the radiation that is transmitted to the Earth, varies depending on the particular solar feature responsible. Thus, the study of both solar weather and solar climate is important in many aspects ... | <urn:uuid:58a95578-6339-4331-b306-b34572485830> | 3.578125 | 167 | Knowledge Article | Science & Tech. | 38.391982 |
On DNA. Which apparently can last for 1000's of years!
"Forget hard disks or DVDs. If you want to store vast amounts of information look instead to DNA, the molecule of which genes are made. Scientists in the UK have stored about a megabyte's worth of text, images and speech into a speck of DNA and then retrieved that ... | <urn:uuid:b46e83d0-0e7c-4fc1-82b2-e05fb60f9b53> | 2.84375 | 173 | Comment Section | Science & Tech. | 63.736115 |
Animals having no backbone or spinal column, such as insects, mollusks, crustaceans, worms, and similar organisms.
USGS Zebra Mussel Monitoring Program for north Texas [ More info] General characteristics of this invasive freshwater mollusk, focusing on how we monitor its presence and migration through this region.
Wes... | <urn:uuid:e8d49a87-5602-4d8e-a620-4c50c290e31e> | 3.25 | 212 | Content Listing | Science & Tech. | 37.132556 |
There are many types of dangerous radiation in space. Astronauts must be careful to remain safe and healthy. Spacewalks are especially dangerous times for radiation exposure.
Click on image for full size
Image courtesy of NASA.
Radiation Dangers to Astronauts
Astronauts are exposed to many different types of dangerous ... | <urn:uuid:ed75ba1c-c142-4458-98e8-afc3e9e811cc> | 3.703125 | 711 | Knowledge Article | Science & Tech. | 45.710642 |
A correct theory of gravity will show us these four (4) things:
1. It will show us why gravity also acts like acceleration (principle
2. It will show us the actual cause of gravity.
3. It will show us why gravitational mass and inertial mass are
4. It will show us the speed of gravitational attraction.
Newton said grav... | <urn:uuid:6dbe45bd-6a70-4c55-ba29-6fbf42c3ca55> | 3.375 | 96 | Q&A Forum | Science & Tech. | 73.97598 |
Frozen Fruit Fly’s Potential
Scientists in Czech Republic have recently thawed a fruit fly which had been frozen the year before while pupating. During this year, the drosophila melanogaster was preserved through several generations at temperatures of 23˚C.
One of the possible side-effects scientists were testing for i... | <urn:uuid:6fcdbcd1-e704-4e8d-975b-3c9d95756f24> | 3.84375 | 269 | Content Listing | Science & Tech. | 29.260238 |
February 02, 2007
Follow Up: IPCC and Hurricanes
Posted to Author: Pielke Jr., R. | Climate Change | Disasters | Science + Politics
The IPCC report is out (PDF) and here is what it says about hurricanes (tropical cyclones). Kudos to the scientists involved. Despite the pressures, on tropical cyclones they figured out a... | <urn:uuid:64ea560c-85c4-4e52-a70c-988e06218bab> | 2.703125 | 2,306 | Comment Section | Science & Tech. | 55.694524 |
Why Heisenberg Is Right (and wrong)
Heisenberg's theory claims you can't measure a particle down the tiniest detail, it will be somewhat inaccurate. However, to transport a particle you will need to know the exact details and then produce another particle with those same characteristics somewhere else. Correct? Well, n... | <urn:uuid:34a28952-3f67-4938-9539-84024d3393d6> | 3.328125 | 640 | Knowledge Article | Science & Tech. | 53.153203 |
See also the
Dr. Math FAQ:
3D and higher
Browse Middle School Two-Dimensional Geometry
Stars indicate particularly interesting answers or
good places to begin browsing.
Selected answers to common questions:
Pythagorean theorem proofs.
- Euler's Formula [11/26/2001]
I have to find Euler's formula for two-dimensional fig... | <urn:uuid:2a73dfe1-f316-4ac8-864c-066d370c339a> | 2.875 | 1,638 | Q&A Forum | Science & Tech. | 70.115489 |
4.5. Magnetic diffusivity equation
From Eqs. (4.22) and (4.23) the Ohmic electric field can be expressed as
which inserted into Eq. (4.19) leads to the magnetic diffusivity equation
The first term of Eq. (4.29) is the dynamo term. The second term of Eq. (4.29) is the magnetic diffusivity term whose effect is to dissipa... | <urn:uuid:edbd6312-40b8-4b50-80bb-5d3a1866eac6> | 2.765625 | 1,773 | Academic Writing | Science & Tech. | 53.949838 |
A Simple Makefile Example
C_SIMPLE is a simple example of how a makefile can be
used to manage a set of C files.
The underlying task is to approximate the integral of a
function F(T) using the midpoint rule. The program
to do this is broken up into three C files and a header file:
the main program, which tries the midp... | <urn:uuid:b73fa1bd-ba34-456c-a6cd-3957d144c1a3> | 3.5 | 192 | Documentation | Software Dev. | 56.605329 |
The Maunder Minimum was a period of anomalously low solar activity that occurred between 1645 and 1715. It corresponded to the coldest part of the "Little Ice Age", which occurred between approximately 1400 and 1850.
During the Little Ice Age, and particularly the Maunder Minimum, the earth was substantially colder tha... | <urn:uuid:7267bb7e-6874-430b-ab34-da2f7cd83691> | 3.21875 | 831 | Personal Blog | Science & Tech. | 49.45675 |
April 10, 2013
Visible as a small, sparkling hook in the dark sky, this beautiful object is known as J082354.96+280621.6, or J082354.96 for short. It is a starburst galaxy, so named because of the incredibly (and unusually) high rate of star formation occurring within it.
March 29, 2013
Life as we know it doesn't thriv... | <urn:uuid:9c158216-eefd-4e63-b5bd-2b253801b024> | 3.171875 | 504 | Content Listing | Science & Tech. | 58.50805 |
In an attempt to move into the field of enterprise application development I started refreshing my Java recently. I was going through a well known book when I stumbled upon the implementation of Strings in Java. I have high esteem for the developers at Sun, but I really could not digest the fact that Sun engineers thou... | <urn:uuid:fa835a53-97fb-4343-a770-33a5d5dc6ec3> | 3.203125 | 1,138 | Personal Blog | Software Dev. | 57.271953 |
|Spooky shapes seem to haunt
starry expanse, drifting through the night in the royal constellation
Of course, the shapes are cosmic dust clouds faintly visible
in dimly reflected starlight.
Far from your own
neighborhood on planet Earth, they lurk at the edge of the
molecular cloud complex some 1,200 light-years away.
... | <urn:uuid:8ebc2082-fc8d-41d1-b108-d7689b5dcb1b> | 2.984375 | 169 | Content Listing | Science & Tech. | 52.57884 |
Lake effect snow is highly localized snowfall, sometimes intense, that forms downwind of large bodies of water such as the Great Lakes. They usually take the shape of narrow bands and can produce significant snow accumulation within very short time periods. As shown on the map below, the Great Lakes have a tremendous i... | <urn:uuid:409f4919-2806-4dab-9ebc-61c894ba17a5> | 4.34375 | 991 | Knowledge Article | Science & Tech. | 46.57842 |
If there's one thing that science fiction is nearly universal on, it's that traveling at or beyond the speed of light looks really freakin' awesome. Star Trek had those rainbow star lines zipping by, Star Wars had something similar, and Spaceballs went all the way to plaid. The reality, unfortunately, may not be nearly... | <urn:uuid:7d0f7d60-1892-42d4-91e2-5d9744a6368a> | 3.40625 | 547 | Personal Blog | Science & Tech. | 55.760526 |
The realisation in the 1980s that DNA is sometimes preserved in very ancient biological specimens opened up a new field of research within evolutionary biology.
Ancient DNA can be seen as a time machine that opens up a window to the past, enabling us to trace molecular evolutionary processes through time and space.
Alt... | <urn:uuid:6ab70854-29c4-45a5-8522-07f302fb7cbe> | 3.796875 | 180 | Knowledge Article | Science & Tech. | 23.175769 |
Feb. 1, 2010 Biodiversity in freshwater systems is impacted as much or more by environmental change than tropical rain forests, according to University of Oklahoma Professor Caryn Vaughn, who serves as director of the Oklahoma Biological Survey. "When we think about species becoming extinct, we don't necessarily think ... | <urn:uuid:e460733b-6190-4ae4-8c56-61d1668c7d76> | 3.6875 | 618 | Truncated | Science & Tech. | 30.995973 |
WINGING IT: Ground birds often seek out trees and other elevated spots for safety. Juveniles not yet capable of flight accomplish this by running up the inclines, flapping their wings to enhance traction. The way these birds employ their developing wings may demonstrate the process by which avian flight evolved. Image:... | <urn:uuid:af1499ad-2246-4b4f-8538-9cc369e440af> | 4.1875 | 381 | Truncated | Science & Tech. | 40.75473 |
Galaxies: Collisions, Types & Other Facts
If you gaze out into the night sky with a telescope, and see beyond what’s visible to the naked eye, you could see a lot of “stars” that are actually imposters. Many of the points of light we often think are individual stellar objects are actually galaxies, collections of milli... | <urn:uuid:04a2aa0e-c2e6-40e2-877f-b8b43fce563c> | 4.0625 | 947 | Knowledge Article | Science & Tech. | 42.420471 |
Accessibility and Usability
Web developers should strive to build web sites that are both accessible, and usable. These are different, but related concepts. Accessibility deals with whether or not people can physically access the content of a web site. Usability considers how people use the web site once they access it... | <urn:uuid:6d863091-d472-451b-bff3-18205d4e5f43> | 2.96875 | 135 | Knowledge Article | Software Dev. | 24.314037 |
CMC: Global weather forecast model from the "Canadian Weather Service"
|Updated:||2 times per day, from 10:00 and 23:00 GMT|
|Greenwich Mean Time:||12:00 GMT = 12:00 GMT|
|Resolution:||0.6° x 0.6°|
This map shows isotachs - lines on a given surface connecting points with
equal wind speed - together with isobars - the l... | <urn:uuid:8bc4e2c9-c3f2-4284-9ad4-93ade6227861> | 3.359375 | 323 | Knowledge Article | Science & Tech. | 45.999644 |
By Daniel Clery, ScienceNOW
In the high-stakes race to realize fusion energy, a smaller lab may be putting the squeeze on the big boys. Worldwide efforts to harness fusion—the power source of the sun and stars—for energy on Earth currently focus on two multibillion dollar facilities: the ITER fusion reactor in France a... | <urn:uuid:71b50e70-204f-4de7-b0d1-9a2b45f46e7d> | 3.9375 | 423 | Truncated | Science & Tech. | 38.512909 |
Exploration 3 (Taxicab Geometry)
Department of Mathematics and Computer Studies
York College (CUNY)
Jamaica, New York
Distance below refers to distance using the taxicab metric. Assume that angles are measured as in the Euclidean plane. The lines in this plane have linear equations.
1. Suppose that one is given the poi... | <urn:uuid:6dfe1e1b-3e16-4e0d-bd7b-556052f6c15b> | 3.28125 | 304 | Tutorial | Science & Tech. | 81.95183 |
Many interesting information about the properties of electrons in a crystal is encoded in the so-called band structure, which, for the semiconducting material gallium arsenide (GaAs), looks like this:
Source: Michael Rohlfing, Peter Krüger, and Johannes Pollmann: Quasiparticle band-structure calculations for C, Si, Ge,... | <urn:uuid:1fe61c41-c107-452b-9e0b-e4c0cfeebd82> | 3.546875 | 1,299 | Personal Blog | Science & Tech. | 48.265196 |
Comprehensive DescriptionRead full entry
This robust frog may be brown, reddish-brown or red above with a variable number of large, black spots and blotches on the back, sides, and legs. The spots are usually irregular-shaped, with indistinct edges and light centers. The skin on back and sides is often covered with sma... | <urn:uuid:2ba4f805-6268-481c-9eb9-d77917c0cb94> | 3.46875 | 347 | Knowledge Article | Science & Tech. | 50.194629 |
Debug Tests into Unit Test Suites
Because one small test will often lead us to discover the true source of a bug, it
that effective debugging should involve lots of testing. There's simply no way to build a reliable system without thoroughly testing it.
Although many programmers may be unfamiliar with the XP style of c... | <urn:uuid:56816e4b-f663-4c45-9cfd-08444cb35782> | 2.796875 | 631 | Documentation | Software Dev. | 47.656533 |
An ultraviolet spectral Atlas of a sunspot with high spectral and
spatial resolution in the wavelength region 1190 - 1730 A is
presented. The sunspot was observed with the High Resolution Telescope
and Spectrograph (HRTS). The HRTS instrument was built at the U.S.
Naval Research Laboratory (NRL), Washington, D.C. (Bart... | <urn:uuid:12f88ac1-72be-42aa-8db2-4d5c4a126f44> | 2.796875 | 749 | Knowledge Article | Science & Tech. | 45.379705 |
The concentration, movement and transformation of metal pollutants in Antarctic soils was investigated with two main objectives; i) to assess the fate of pollutants already present in the soil and ii) to establish experimental plots from which the rate of metal movements can be determined. The work was carried out at t... | <urn:uuid:375f0a4e-169d-470a-96bb-6bc3360250f2> | 3.171875 | 369 | Academic Writing | Science & Tech. | 41.810076 |
O'PHIUROI'DEA (Neo-Lat. nom. pl., from Ok. four, ()phis. serpent apd, our," thin. 'rhe class of brittle stars. or sand stars, of which Ophiura is the typical genus. Ophiuroids (or ophiurans I are star-shaped, freely moving echino Berms (q.v.), with a flat, roundish or polygonal disk, from which suddenly arise live arms... | <urn:uuid:61889476-6ea0-4a45-a0d1-e274035ae47c> | 3.34375 | 604 | Knowledge Article | Science & Tech. | 41.911154 |
Two well-known enough physicists were born on August 1st: Walter Gerlach in 1889 and Douglas Osheroff in 1945.
Douglas Osheroff – congratulations to Stanford – was born to an originally Jewish Russian father and an originally Slovak mother in the Washington state.
As an undergrad, he would attend Feynman's lectures at ... | <urn:uuid:9444fa76-dc0e-4eee-b292-4ab8815a7013> | 3.375 | 870 | Personal Blog | Science & Tech. | 36.952832 |
Lightweight Directory Access Protocol
The Lightweight Directory Access Protocol (LDAP) is a directory service protocol that runs on a layer above the TCP/IP stack. It provides a mechanism used to connect to, search, and modify Internet directories.
The LDAP directory service is based on a client-server model. The funct... | <urn:uuid:abb5d231-9633-4fdf-a5ca-f1fc70519ee0> | 2.78125 | 335 | Documentation | Software Dev. | 31.043445 |
Impact of changes in diffuse radiation on the global land carbon sink
Mercado, Lina M.; Bellouin, Nicolas; Sitch, Stephen; Boucher, Olivier; Huntingford, Chris; Wild, Martin; Cox, Peter M.. 2009 Impact of changes in diffuse radiation on the global land carbon sink. Nature, 458. 1014-1017. 10.1038/nature07949Before down... | <urn:uuid:d27e65cc-8aae-4b72-9c71-b27cceb0e357> | 2.6875 | 421 | Academic Writing | Science & Tech. | 26.524493 |
Make a cube out of straws and have a go at this practical
Reasoning about the number of matches needed to build squares that
share their sides.
How can the same pieces of the tangram make this bowl before and after it was chipped? Use the interactivity to try and work out what is going on!
Look at this image for a shor... | <urn:uuid:3c707d5b-2817-4e1f-a0c8-d8c9599f0068> | 3.34375 | 133 | Tutorial | Science & Tech. | 55.906923 |
2. Use of Optogenetics Techniques to Discover Pathway-specific Feedforward Circuits Between Thalamus and Neocortex
All brain functions involve coordinated neural activities in many brain regions. Therefore, it is important to understand how different brain regions interact with each other. One particularly important co... | <urn:uuid:8a186870-1822-418a-9259-1c193b4f95d7> | 2.703125 | 576 | Academic Writing | Science & Tech. | 21.986468 |
| Experimental Chemistry
|| Main project page|
Previous entry Next entry
To conduct the salt test on the porphyrin film, to take UV-Vis of the remaining solutions, and to measure the sodium content of the PVOH/glutaraldehyde film that was soaked in NaOH.
- The acetone that the dye film was placed in was changed.
Porphy... | <urn:uuid:81a5a5e8-18a1-4bf9-b8f9-63e16554df34> | 3.109375 | 369 | Personal Blog | Science & Tech. | 67.472268 |
|Unifying gravity with the other three interactions ( the electromagnetic, weak, and strong interactions) would provide a theory of everything (TOE), rather than a GUT Grand Unified Theory. GUTs are often seen as an intermediate step towards a TOE. And now suddenly on April 6th, Mystery signal at Fermilab hints at 'tec... | <urn:uuid:39ea5235-d15c-49c7-849f-bb3913395388> | 2.6875 | 1,120 | Truncated | Science & Tech. | 37.648411 |
Where there are no opposing forces, a moving body needs noforce to keep it moving with a steady velocity ( Newton's first law of motion ).
If, however, a resultant force does act on a moving body in the direction of its motion, then it will accelerate ( Newton's second law of motion ) and the work done by the force wil... | <urn:uuid:42b2a718-c314-4b11-870f-fe84fa891933> | 4.1875 | 1,219 | Tutorial | Science & Tech. | 81.537744 |
The giant cluster of elliptical galaxies in the center of this image contains so much dark matter mass that its gravitational field bends light. This means that for distant galaxies in the background, the cluster acts as a magnifying glass, bending and concentrating the distant object’s light towards Hubble. These grav... | <urn:uuid:84f5d03d-c707-46eb-8e32-689502bf12cb> | 3.0625 | 118 | Knowledge Article | Science & Tech. | 56.951983 |
Cars kill more animals in protected areas
Other studies have linked roadkill numbers to factors such as climate or the animal’s activity. For example, amphibians often get squashed on their way to breeding ponds during the rainy season. A team of European scientists wondered if the protection status of the area also ma... | <urn:uuid:41c96c32-ffd3-47b7-8e6f-31e1cbf183d0> | 3.015625 | 372 | Truncated | Science & Tech. | 52.773478 |
It's long been accepted by biologists that environmental factors cause the diversity-or number-of species to increase before eventually leveling off. Some recent work, however, has suggested that species diversity continues instead of entering into a state of equilibrium.
But new research on lizards in the Caribbean no... | <urn:uuid:eacd493e-e2b1-4dd9-936e-eacd05221dae> | 3.5 | 331 | Knowledge Article | Science & Tech. | 29.89977 |
Arctic ice set to match all-time record low
Satellite measurements reveal that volumes have fallen consistently over past 30 years
Steve Connor is the Science Editor of The Independent. He has won many awards for his journalism, including five-times winner of the prestigious British science writers’ award; the David Pe... | <urn:uuid:18ca467b-337a-4816-bf25-512fc2902ec6> | 2.84375 | 1,027 | Truncated | Science & Tech. | 40.134768 |
With a healthy appetitie for uranium and petroleum, this family of bacteria clean up nuclear waste and other toxic materials. A team of researchers has discovered exactly how they use their arms to do this.
After hearing the stories about the work that leaders from the gulf coast and their organizations have done, it’s... | <urn:uuid:ec4353c3-f773-4a27-8664-4886b81d3730> | 3.140625 | 241 | Content Listing | Science & Tech. | 28.625 |
For thousands of years,
farmers have surveyed their fields and eyed the sky, hoping for good weather and a bumper crop. And when they found particular plants that fared well even in bad weather, were especially prolific, or resisted disease that destroyed neighboring crops, they naturally tried to capture those desirab... | <urn:uuid:5e555722-ec69-47cc-afc0-c6232a473b08> | 3.328125 | 126 | Truncated | Science & Tech. | 45.299545 |
Title: Foliar moisture content of Pacific Northwest vegetation and its relation to wildland fire behavior.
Author: Agee, James K.; Wright, Clinton S.; Williamson, Nathan; Huff, Mark H.
Source: Forest Ecology and Management. 167: 57-66
Description: Fotiar moisture was monitored for five conifers and associated understor... | <urn:uuid:08650bb4-8ff2-4297-a1f4-27fd03b0f588> | 2.796875 | 325 | Truncated | Science & Tech. | 41.001028 |
The VMware Infrastructure management object model is a complex system of data structures designed to provision, manage, monitor, and control the life-cycle of all components that can possibly comprise virtual infrastructure. The VMware infrastructure management architecture is patterned after Javas JMX (Java Management... | <urn:uuid:be27f86a-1fdf-4523-88b2-aa91fddbb1ae> | 2.75 | 400 | Documentation | Software Dev. | 23.750903 |
Once all the writes are performed, the document.close() method causes any output written to the output stream to be displayed.
Note: If a document already exists in the target, it will be cleared. If this method has no arguments, a new window (about:blank) is displayed.
|MIMEtype||Optional. The type of document you are... | <urn:uuid:38f6fa04-7c6f-48f1-bc30-76c78094ae3c> | 2.9375 | 180 | Documentation | Software Dev. | 55.51235 |
On a Sunday morning early in January, about two dozen prominent physicists gathered behind closed doors at the California Institute of Technology to ponder the state of their craft.
American physicists were not exactly sitting on the sidelines last July when CERN announced the probable discovery of the long-sought Higg... | <urn:uuid:61e31c54-c1e4-4d17-a5bf-fb1dde5b4db7> | 2.90625 | 822 | Truncated | Science & Tech. | 33.502669 |
Returns a new mem object referring to nwords (an int) of newly allocated and cleared memory. Each word is either 1, 2, or 4 bytes as specified by wordz (an int, default 1). Indexing of mem objects performs the obvious operations, and thus pointers work too.
Returns a copy of old. If old is an intrinsically atomic type ... | <urn:uuid:f11a8cfa-8c7b-46c1-8813-a5e0a601b337> | 2.78125 | 3,144 | Documentation | Software Dev. | 55.215824 |
Okay, lemme do this for Upriver:
Radius of the sun: 7 108 m
Mass of the sun: 2 1030 kg
Average density: 1410 kg m-3
Density of iron: 8 103 kg m-3
So we take a shell of iron of thickness D and calculate how heavy it is.
Volume is 4 pi R2 D (when the thickness is much smaller than the radius of the Sun).
V = 4 pi R2 D = ... | <urn:uuid:e37e524f-6450-4108-bfe6-2d8a14ba626e> | 3 | 209 | Comment Section | Science & Tech. | 65.658846 |
Cosmic strings are theoretical fault lines in the universe, defective links between different regions of space created in the moments after the Big Bang. And they might be theoretical no longer - distant quasars show the fingerprints of these strings.
Compared to cosmic strings, black holes seem downright sensible. The... | <urn:uuid:6c4c6ca9-5d25-44b6-85b2-1a324d27b225> | 3.1875 | 511 | Nonfiction Writing | Science & Tech. | 39.987471 |
This article only skims the surface of Galois theory and should
probably be accessible to a 17 or 18 year old school student with a
strong interest in mathematics.
The binary operation * for combining sets is defined as the union
of two sets minus their intersection. Prove the set of all subsets
of a set S together wit... | <urn:uuid:0d761ffe-41cb-43fa-928c-c98ab19f6ebd> | 3.09375 | 89 | Knowledge Article | Science & Tech. | 51.560565 |
Copyright © University of Cambridge. All rights reserved.
'Difference Dynamics' printed from http://nrich.maths.org/
This iterative process produces a chain of different sequences
which is actually a sequence of sequences . Start with short
sequences of small numbers so that you can easily produce a
chain of sequences ... | <urn:uuid:7d2ec004-7d45-4579-9d79-8bbed30e2492> | 2.9375 | 87 | Knowledge Article | Science & Tech. | 43.271429 |
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.
2001 September 21
Explanation: Black hole candidate XTE J1118+480 is known to roam the halo of our Milky Way Galaxy. This exotic system - thought to... | <urn:uuid:f42782d0-e533-4a20-8e2f-967437500a8b> | 3.59375 | 318 | Knowledge Article | Science & Tech. | 50.55 |
"Syntax" is a type for representing source code in Racket, which is a wrapper around S-expression (see a recent blog post for details). "Syntax value" and "syntax object" are all synonyms of this, and ni the ancient days of the
mzscheme language functions that deal with syntax used
syntax-value in the name. These days ... | <urn:uuid:0ada049d-c720-4883-9c84-f0b4bac8523e> | 3.578125 | 409 | Q&A Forum | Software Dev. | 54.437352 |
The World's Highest Laboratory
The space station's finished. Now what?
- By Guy Gugliotta
- Air & Space magazine, March 2012
(Page 3 of 5)
Scientists are interested in jatropha because it produces a fruit whose seeds yield an astonishingly pure oil that is an ideal source of biodiesel. “The problem is we don’t have com... | <urn:uuid:36225de9-4ca8-4365-86ee-7acfbb554466> | 2.9375 | 1,012 | Truncated | Science & Tech. | 30.710313 |
Physics in the Republic of Armenia
The republic of Armenia is located in the mountainous region of the Caucasus. In 1991, the people of Armenia were amongst the first to take advantage of the Gorbachev’s reform movements to become an independent entity separate from the Soviet Union. The country is home to approximatel... | <urn:uuid:ebe33043-8c65-4a19-8351-9ba2cbb10e60> | 2.765625 | 1,716 | Knowledge Article | Science & Tech. | 30.314772 |
The Cogs of Precognition
|Scaling Up Expert Opinion
Astrobiology Magazine asked experts in online education to rank their wish-list of innovations. The question was posed to former Vice President of the UNext Corporation, Doug Ryan: "From the European Space Agency's list of science fiction inventions that should be mad... | <urn:uuid:49ca766c-465d-4c95-8650-9c7b7f3ad657> | 2.796875 | 2,773 | Content Listing | Science & Tech. | 38.001492 |
The giant wetas are the world’s heaviest insects. The heaviest ever recorded was a female that weighed 71g (2.5oz). That's three times the weight of an average house mouse. In fact, wetas are the insect equivalent of mice. They evolved in the small rodent niche because in New Zealand there were no mice to compete with ... | <urn:uuid:3c7e7b84-c167-45ad-a474-c39fcdd3ecae> | 3.390625 | 432 | Knowledge Article | Science & Tech. | 54.312504 |
Defining "Deep sea"
pjhe at soc.soton.ac.uk
Tue Aug 10 07:41:20 EST 2004
For my book The Biology of the Deep Ocean (OUP) I took "deep ocean" to
refer to any bit of the ocean where the bottom depth was greater than 200m.
Thus it included everything from the surface to the sea floor except over
the continental shelves. T... | <urn:uuid:e7c354e0-3daa-43d5-a5da-590285ddf33d> | 3.140625 | 374 | Comment Section | Science & Tech. | 53.65993 |
Lecture #26, April 22
READ SNOW CHAPTER 13 PAGES 286-301
LOOK OVER THOUGHT QUESTIONS #1,2,8,9,10.
LIGHTNING BOLT HURLING ZEUS
Unlike Venus, the planet Jupiter has just the right name. Not only
is it the largest of the planets, but it "hurls" the greatest
between Io and its poles.
The high rotational rate of Jupiter res... | <urn:uuid:5676d0c1-bd3c-460d-ba37-846589671d78> | 3.796875 | 458 | Truncated | Science & Tech. | 54.256683 |
This video shows the movement of blue straggler stars in globular clusters over time. Blue straggler stars are blue, bright stars, with a higher mass than the average for a cluster, and they are expected to sink towards the centre of a star cluster over time. Those closest to the cluster core are the first to migrate i... | <urn:uuid:0d852388-50c3-4313-bcf1-87781f49cb7d> | 3.640625 | 208 | Truncated | Science & Tech. | 44.987821 |
Alabama Beach Mouse
ALABAMA BEACH MOUSE
Photo Credit: Nick R. Holler
SCIENTIFIC NAME: Peromyscus polionotus ammobates (Bowen)
DESCRIPTION: Smallest (adults, total length =122-153 mm [4.8-6.0 in.]; weights =10.0-17.0 g [0.35-0.60 oz.]; pregnant females reaching 22-25 g [0.78-0.88 oz.]) species of Peromyscus in North Ame... | <urn:uuid:e77771f5-33e5-42dc-8c93-6cf4fd674434> | 3.078125 | 1,517 | Knowledge Article | Science & Tech. | 38.617562 |
[Haskell-beginners] Bit arithmetic in Haskell
byorgey at seas.upenn.edu
Tue Dec 9 08:02:46 EST 2008
On Tue, Dec 09, 2008 at 05:30:28PM +0600, Artyom Shalkhakov wrote:
> I'm trying to do some bit arithmetic. Here's the function:
> > import Data.Bits
> > import Data.Word
> > g :: Word32 -> [Word32]
> > g x = [(x `shiftR`... | <urn:uuid:73bf1989-dd00-41d8-b8dc-d74236fbd925> | 3.234375 | 379 | Comment Section | Software Dev. | 113.180951 |
May 22, 1995: Peering into the heart of two recently exploded double-star systems, the Hubble telescope has surprised researchers by finding that the white dwarf stars at the center of the fireworks are cooler than expected and spin more slowly than previously thought.
Each dwarf - dense, burned-out stars that have col... | <urn:uuid:7369b36b-d6d1-4a00-bbc8-98ac088f9878> | 3.671875 | 204 | Knowledge Article | Science & Tech. | 36.054538 |