text large_stringlengths 148 17k | id large_stringlengths 47 47 | score float64 2.69 5.31 | tokens int64 36 7.79k | format large_stringclasses 13
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Watch it live tonight: An asteroid that NASA astronomers compared to the size of a city block dubbed 2012 LZ1, is roughly 502 metres wide, and will come within 14 "lunar distances" — a measurement of the distance from the Earth to the moon — from our planet. A few days ago astronomers first noticed the giant asteroid's... | <urn:uuid:13b1afc0-e796-44bb-b240-597bad005bbb> | 3.375 | 286 | Personal Blog | Science & Tech. | 62.703571 |
Emeka Okafor writes "PhysOrg comments on a breakthrough in the path towards DNA computing, with implications in the field of molecular construction methods: "…Caltech assistant professor Erik Winfree and his colleagues show that DNA "tiles" can be programmed to assemble themselves into a crystal bearing a pattern of pr... | <urn:uuid:33807948-4f7b-4645-91a3-cea8a262286e> | 3.140625 | 287 | Truncated | Science & Tech. | 30.290262 |
Summary: Math 1550 Fall 2005
Section 31 P. Achar
Exam 2 Solutions
October 4, 2005
Total points: 50 Time limit: 1 hour
No calculators, books, notes, or other aids are permitted. You must show your work and justify your
steps to receive full credit.
1. (4 points) Short answer. Warning: At least one of the questions below... | <urn:uuid:e0fc89f3-5435-4328-977f-da9c14cd9c01> | 2.71875 | 201 | Q&A Forum | Science & Tech. | 96.024615 |
Mechanics: Momentum and Collisions
Momentum and Collisions: Problem Set Overview
This set of 32 problems targets your ability to use the momentum equation and the impulse-momentum change theorem in order to analyze physical situations involving collisions and impulses, to use momentum conservation principles to analyze... | <urn:uuid:61ea9413-f456-4265-81b5-78b76d755688> | 4.09375 | 2,619 | Tutorial | Science & Tech. | 43.695115 |
CASSINI AND HUYGENS, THE PIGGYBACK PROBE
For seven years and two billion miles, the Cassini space-craft carried the Huygens lander up to Saturn. Last December, six months after Cassini began its four-year study of Saturn, it released Huygens—a probe the size of a Volkswagen Beetle—on a trajectory toward Saturn´s larges... | <urn:uuid:bd1355d8-4fbd-4751-a38d-5ea1376dafee> | 3.5 | 191 | Truncated | Science & Tech. | 45.826838 |
Apr. 26, 2007 Recent research published in the journal Biotropica addresses commercial hunting in the tropics, including its direct impacts on vertebrates and indirect impacts on plants.
Many of the birds and mammals found in tropical ecosystems are frugivores, animals that disperse seeds rather than eat and kill them.... | <urn:uuid:20d4d54c-2f70-4912-885e-900175e4b0b3> | 3.6875 | 384 | Truncated | Science & Tech. | 27.683688 |
In a 2006 article in JGR, Aslak Grinsted, John Moore, Viejo Pohjola, Tonu Martma and Elisabeth Isaksson study several climate indicators from the Lomonosovfonna ice field in Svalbard, shown below with their caption:
Figure 5. Fifteen-year moving averages of Lomonosovfonna ice core data. (a) Oxygen isotopes, (b) contine... | <urn:uuid:9a274c5f-c96a-4797-b224-51603c9fa75f> | 2.890625 | 1,402 | Comment Section | Science & Tech. | 57.291004 |
OGNL stands for Object-Graph Navigation Language; it is an expression language for getting and setting properties of Java objects, plus other extras such as list projection and selection and lambda expressions. You use the same expression for both getting and setting the value of a property.
The Ognl class contains con... | <urn:uuid:bc1b622d-c581-4d34-a647-539c1bff66c0> | 3.28125 | 330 | Knowledge Article | Software Dev. | 45.826838 |
Redirected from Spectral class
Stars can be classified by their surface temperatures as determined from Wien's Displacement Law, but this poses practical difficulties for distant stars. Spectral characteristics offer a way to classify stars which gives information about temperature in a different way - particular absor... | <urn:uuid:129ec399-f972-444d-8755-1baae510ee5c> | 3.828125 | 1,627 | Knowledge Article | Science & Tech. | 53.638071 |
Asymmetric Ashes (artist's impression)
Artist's impression of how Type Ia supernovae may look like as revealed by spectro-polarimetry observations. The outer regions of the blast cloud is asymmetric, with different materials found in 'clumps', while the inner regions are smooth. Using observations of 17 supernovae made... | <urn:uuid:a2c054e3-e583-4b6e-b85e-245e0590a741> | 2.921875 | 285 | Truncated | Science & Tech. | 31.537931 |
Brought to you by the Organic Reactions Wiki, the online collection of organic reactions
Electrophilic fluorination is the combination of a carbon-centered nucleophile with an electrophilic source of fluorine to afford organofluorine compounds. Although elemental fluorine and reagents incorporating an oxygen-fluorine b... | <urn:uuid:05c12a06-eb64-4edf-8b7c-91865a382122> | 2.6875 | 2,607 | Knowledge Article | Science & Tech. | 51.344887 |
The answer is in the same Wikipedia article but I feel the need to mention anisotropies:
Anisotropy /ˌænaɪˈsɒtrəpi/ is the property of being directionally
dependent, as opposed to isotropy. An example of anisotropy is the
light coming through a polarizer. An example of an anisotropic
material is wood, which is easier t... | <urn:uuid:89604713-1beb-470f-aa90-e69a08809306> | 3.3125 | 501 | Q&A Forum | Science & Tech. | 26.342025 |
Takeshi Inomata Anastasia Kravtsova, left, and Q’eqchi’ excavators working on burials.
Takeshi Inomata and Daniela Triadan of the University of Arizona excavated the Maya site of Ceibal in Guatemala. In this post, they answer readers’ questions about their recent expedition.
I was particularly drawn by Professor Inomat... | <urn:uuid:978d924e-effb-41a6-9b38-4ceb5d009b0b> | 3.171875 | 3,429 | Content Listing | Science & Tech. | 46.536177 |
It is easy to understand that the inertial coefficients appearing in the kinetic energy T must depend on the densities of solid and fluid constituents and , and also on the volume fractions v(1), v(2) and porosities , of the matrix material and fractures, respectively. The total porosity is given by and the volume frac... | <urn:uuid:0ce5d46f-36ea-44f2-932f-8efe16bbd019> | 2.828125 | 1,395 | Academic Writing | Science & Tech. | 62.474321 |
Science Fair Project Encyclopedia
Human spaceflight is space exploration with a human crew, and possibly passengers (in contrast to dog-manned space missions , which are remotely-controlled or robotic space probes). Traditionally, these endeavours have been referred to as manned space missions, although today some pref... | <urn:uuid:c3b20c28-34bf-46d1-bc84-60364360c872> | 3.734375 | 806 | Knowledge Article | Science & Tech. | 37.975622 |
The Hobby-Eberly Telescope Dark Energy Experiment — HETDEX, at The University of Texas at Austin McDonald Observatory will be the first major experiment to probe dark energy. Its observations will narrow the list of possible explanations for dark energy, and may even provide the final answer.HETDEX will be the first ma... | <urn:uuid:a5d95261-88fd-4845-9b79-a8c02db1b95d> | 2.9375 | 1,173 | Content Listing | Science & Tech. | 43.756846 |
|Before an atmospheric discharge,
a thundercloud - cumulo nimbus - emits a series of ions known as down
tracers or leaders. The negative polarity leaders fall towards the
ground in successive fifty meter drops at speeds of 0.15 to 1 m per
microsecond (µs), whereas the positive leaders fall more steadily.
||As they appr... | <urn:uuid:217c7fd1-cc92-4442-a750-3ad5bcd2f99c> | 3.234375 | 186 | Knowledge Article | Science & Tech. | 45.633333 |
Shaffer, P.W., C.A. Cole, M.E. Kentula, and R.P. Brooks. 2000. Effects of measurement frequency on water-level summary statistics. Wetlands. 20(1):148-161.
Wetland scientists and managers recognize the need to characterize hydrology for understanding wetland ecosystems. Hydrologic data, however, are not routinely colle... | <urn:uuid:4e264cc6-e638-46ac-b06f-55a5b6823d41> | 2.8125 | 519 | Academic Writing | Science & Tech. | 39.760287 |
4.1 Moist atmospheric convection
Understanding moist atmospheric convection and its influence on climate variability is central to empirical and process studies at CDC. It links small-scale turbulent motions to global circulations through cloud formation and precipitation. It connects the slowly varying conditions at t... | <urn:uuid:1ae59779-6e41-46ca-860c-253fae11a701> | 3.578125 | 1,205 | Academic Writing | Science & Tech. | 22.444956 |
words breaks a string up into a list of words, which were delimited by white space.
words breaks a ByteString up into a list of words, which were delimited by Chars representing white space.
words breaks a ByteString up into a list of words, which were delimited by Chars representing white space. And
> tokens isSpace =... | <urn:uuid:3da711e0-f529-4df9-a803-1ed374f239e0> | 3.328125 | 206 | Documentation | Software Dev. | 44.683598 |
Animated View of the AIM Mission
The Aeronomy of Ice in the Mesosphere (AIM) mission will provide the first detailed exploration of Earth's unique and elusive noctilucent or night shining clouds that are found literally on the "edge of space." Located near the top of the Earth's mesosphere (the region just above the st... | <urn:uuid:4beb11ac-34fa-488b-9243-458376e54b6f> | 2.765625 | 102 | Truncated | Science & Tech. | 21.328158 |
Creating an Electric Field
Name: Brian S.
I wish to create a lab with a a small pith ball and an
E-field. I would like to suspend a pith ball in an E-field and watch it deflect
like a pendulum and measure the angle.
My problem is how can I create an E-field? any ideas?
Take an aluminum pie pan and tape an insulator han... | <urn:uuid:dce1f54e-dcef-492f-b7fd-28453136e667> | 2.953125 | 156 | Q&A Forum | Science & Tech. | 74.805 |
Scientists work to make ‘exploding’ lakes safe
Explore This Story
Can a lake kill?
The “exploding” lakes phenomenon is real, with more and more scientific evidence supporting the notion that lakes have the power to kill.
So where are these deadly lakes? And what are scientists doing to prevent more deaths?
On Aug. 21, ... | <urn:uuid:a4183bed-2424-491c-9419-8e612ce6dd8c> | 3.734375 | 1,061 | Truncated | Science & Tech. | 51.032322 |
Left, "before" image, from the Sloan Digital Sky Survey. Right, "after" image, from Swift's Ultraviolet/Optical Telescope. The pinpoint of light in the centre is the GRB, which outshines the entire host galaxy. Click image for the high resolution image [8.7MB tiff].
NASA's Swift telescope has detected a gamma-ray burst... | <urn:uuid:951c9d5b-f31b-49d0-9599-929e9d60d909> | 3.4375 | 199 | Personal Blog | Science & Tech. | 54.744 |
5.1 Maximum Radius of Space Colonies
The maximum radius of such an O'Neill style colony is limited by the hoop stress of the spinning structure, and the tensile strength to density ratio of the material. The formula is
R = HoopStress/gG
Where R is the radius, g is the acceleration of pseudo-gravity at the rim, and G is... | <urn:uuid:27085444-b875-43d2-a7ac-71fc1d5aaef4> | 2.859375 | 284 | Comment Section | Science & Tech. | 74.61674 |
3.1 Evaluation 3.1.2 The Evaluation Model 18.104.22.168 Form Evaluation 22.214.171.124.2 Conses as Forms
126.96.36.199.2.3 Function FormsIf the operator is a symbol naming a function, the form represents a function form, and the cdr of the list contains the forms which when evaluated will supply the arguments passed to... | <urn:uuid:6978dc03-5598-415a-87e9-40a641566a69> | 2.75 | 379 | Documentation | Software Dev. | 60.569676 |
Search Mathematical Communication:
Types of proof & proof-writing strategies
Topic Teaching Tip(s): General principles of mathematical communication | Types of proof & proof-writing strategies
This webpage includes examples of various types of proof, including proof by contradiction and proof by induction. Addresses wh... | <urn:uuid:43b5c7cc-fb28-4bf6-8bab-14f81c612eaa> | 3.234375 | 152 | Content Listing | Science & Tech. | 20.598276 |
Jet Stream Revisited
Name: Peter E.
I have read your archival info re "Jet Streams" and in my studies have
realized that this complex 3-D system (according to some authors)
BEGINS with the temp/press gradients at a low level, influencing
mid level winds moving either cyclonically or anticyclonically;add
the intrusion o... | <urn:uuid:5e5ab67a-2fd6-4ff7-8f44-aba1b14daf68> | 2.96875 | 563 | Q&A Forum | Science & Tech. | 46.414018 |
Jul 5, 2000, 10:08 PM
Post #2 of 7
I agree with SixKiller (is it fair if I play, too? )
@new = map /o/ ? $& : (), qw!one two three four five!;
It's basically saying that if o matches, as it does in (one, two, and four), toss only the precise text that matched (stored in $&), which is o, into @new. If it doesn't match, ... | <urn:uuid:aa4820ca-78f1-4410-9b9d-5bc670728fac> | 2.9375 | 271 | Comment Section | Software Dev. | 77.392823 |
Science@NASA Headline News
You may have noticed that the "look and feel" of Science@NASA stories has changed. There's no cause for alarm. Our core product, simply- and clearly-told stories about NASA science, remains the same. The changes are a sign of progress. Recently, the Science@NASA team joined forces with the Sc... | <urn:uuid:5388d851-1fc5-4bc3-9690-57577392aed1> | 3.03125 | 621 | Content Listing | Science & Tech. | 55.051974 |
February of 1936 was the coldest in the US since the start of the twentieth century.
13 Feb 1936 – RECORD COLD IN NORTH AMERICA New York, Wednesday.
That month had the most record minimums.
It also had the coldest average temperature, at -4C.
By contrast, July of 1936 was incredibly hot.
That month blew away all other ... | <urn:uuid:3599914c-d1fc-4c3e-a002-48a706cc5198> | 2.953125 | 317 | Personal Blog | Science & Tech. | 53.619681 |
Billie Jean Plexus (by Colin Rozee)
New materials remove carbon dioxide from... →
Scientists are reporting discovery of an improved way to remove carbon dioxide — the major greenhouse gas that contributes to global warming — from smokestacks and other sources, including the atmosphere. Their report on the process, whic... | <urn:uuid:6414dc2d-a5ab-42ae-a187-3423f47dea0d> | 2.765625 | 119 | Content Listing | Science & Tech. | 30.947692 |
Saturday 25 May
Sea lamprey (Petromyzon marinus)
What’s the World’s Favourite Species?Find out here.
Sea lamprey fact file
- Find out more
- Print factsheet
Sea lamprey description
Lampreys are some of the most primitive vertebrates alive today, they are known as cyclostomes, which means 'round mouths' and refers to th... | <urn:uuid:d789fa78-bef5-4a10-839c-2100c3659a77> | 3.96875 | 1,617 | Knowledge Article | Science & Tech. | 40.725763 |
Biology Plug N' Play
When you're hard drive fails, you order a new one online and then swap it out. Why can't we do that for biological parts as well? From DNA robots and "organs-on-a-chip" to nanobristles that grab-and-release drugs, this slideshow explores the two major goals of synthetic biology: to build new biolog... | <urn:uuid:f21ca05e-17c3-41ea-8be0-3719ddd58907> | 3.25 | 2,050 | Knowledge Article | Science & Tech. | 33.73127 |
Below you'll find a little introduction to two-photon physics - porbabely more than you ever wanted to know about it.
A photon can, within the bounds of the uncertainty principle, fluctuate into a charged fermion/ anti-fermion pair, to either of which the other photon can couple. This fermion pair can be leptons or qua... | <urn:uuid:1dc41c5a-d588-4e6a-9e20-f690c25209d2> | 3.46875 | 304 | Tutorial | Science & Tech. | 45.555217 |
Hurricanes form through an exchange of warm, humid air and cold, unstable air between the upper and lower atmosphere. (Diagram from NASA)
Hurricanes begin when areas of low atmospheric pressure move off Africa and into the Atlantic, where they grow and intensify in the moisture-laden air above the warm tropical ocean. ... | <urn:uuid:e709062d-6a4f-4a83-9ece-62583629f6ab> | 4.21875 | 480 | Knowledge Article | Science & Tech. | 28.233955 |
Strong evidence for the existence of a giant black hole in the core of a galaxy has come from NASA's Hubble Space Telescope. Images of M32, a dwarf elliptical galaxy near to our own, show that stars become clustered much more closely together near its centre, which is what should happen if the galaxy contains a black h... | <urn:uuid:b293eb7f-7ac8-4822-8461-e978b4d5f4e1> | 4.25 | 202 | Truncated | Science & Tech. | 43.190349 |
|Nov16-08, 09:38 PM||#1|
How much power is radiated by the human body?
The power per unit area radiated by an ideal blackbody radiator is P/A = σT4, where P = power, A = surface area, the Stefan-Boltzmann constant is σ = 5.67 ×10−8 W m−2 K−4, and T = temperature (in the absolute kelvin scale).
How much power is radiate... | <urn:uuid:e18c1107-66fb-485b-8f4e-97151d0b0b91> | 3.0625 | 388 | Comment Section | Science & Tech. | 65.807233 |
|Group||Actinides||Melting point||1135 oC, 2075 oF, 1408.15 K|
|Period||7||Boiling point||4131 oC, 7467.8 oF, 4404.15 K|
|Block||f||Density (kg m-3)||19050|
|Atomic number||92||Relative atomic mass||238.029|
|State at room temperature||Solid||Key isotopes||234U, 235U, 238U|
|Electron configuration||[Rn] 5f36d17s2||CAS ... | <urn:uuid:db453e73-7a44-46d5-a276-1457cbee662c> | 2.875 | 2,426 | Knowledge Article | Science & Tech. | 53.011152 |
Web edition: August 23, 2012
On August 5, after a journey lasting more than 8 months, a carlike rover carefully settled down onto the surface of Mars. The vehicle is basically a science lab. Its mission: to search for evidence that the Red Planet might once have hosted life — even if the organisms were only one-celled ... | <urn:uuid:8033a6cf-cf90-44d4-ac7b-e25e5779687a> | 3.953125 | 273 | Truncated | Science & Tech. | 47.220903 |
NASA's 23-year-old Hubble Space Telescope is still going strong, and agency officials said Tuesday (Jan. 8) they plan to operate it until its instruments finally give out, potentially through 2018, space agency officials say. [Read the Full Story]
This artist's illustration shows the atmosphere of a brown dwarf called ... | <urn:uuid:a76e18b0-b753-4e71-9c93-ca0f6fbf1b70> | 3.015625 | 852 | Content Listing | Science & Tech. | 57.50739 |
During nuclear fission, great amounts of energy are produced from
A. very small amounts of mass.
B. tremendous amounts of mass.
C. a series of chemical reactions.
D. particle accelerators.
(See answer below)
... mass of chemical fuel such as gasoline, making nuclear fission a very dense source of energy. ... [ produced... | <urn:uuid:4c5d2d7f-8bae-493a-9466-5be8800e9847> | 3.296875 | 122 | Q&A Forum | Science & Tech. | 52.499022 |
Introduction To Android Programming
Android relies on the Dalvik Virtual Machine which uses Dalvik bytecode (named after the fishing village of Dalvík in Eyjafjörður, Iceland where some of the creators' ancestors lived according to Wikipedia). Developers write their programs in Java and the Android SDK converts it into... | <urn:uuid:5e7c38ca-3be0-458b-9527-03460311f843> | 3.359375 | 1,016 | Documentation | Software Dev. | 44.767381 |
Atomic Number: 27
Atomic Weight: 58.9332
Discovery: George Brandt, circa 1735, maybe 1739 (Sweden)
Electron Configuration: [Ar] 4s2 3d7
Word Origin: German Kobald: evil spirit or goblin; Greek cobalos: mine
Isotopes: Twenty-six isotopes of cobalt ranging from Co-50 to Co-75. Co-59 is the only stable isotope.
Properties... | <urn:uuid:bd611369-0429-4eb9-9a77-35359b909546> | 3.28125 | 1,046 | Knowledge Article | Science & Tech. | 58.707116 |
int mvgetch(y, x)
int mvwgetch(win, y, x)
getch() will read input from the
terminal in a manner depending on whether delay mode is set or
not. If delay is on, getch() will wait until a key is
pressed, otherwise it will return the key in the input buffer
or ERR if this buffer is empty. mvgetch(...) and
will move the cur... | <urn:uuid:df05d44a-e998-4aaa-b06c-ebf108cb5ded> | 2.796875 | 237 | Documentation | Software Dev. | 71.57034 |
Provides humanity with rich resources
And reveals secrets of the climate.
Aside from the national parks,
There is another group of guardians over marine
Resources—a group of scientists.
They try to decode the messages from the ocean,
And unlock the mysteries of climate change.
Global warming is by far the hottest envir... | <urn:uuid:5c84e203-6195-421b-a390-ac3a3f70bd23> | 3.46875 | 501 | Knowledge Article | Science & Tech. | 46.894133 |
The role of glial cells – or cells that “glue” the neurons together – has traditionally been that of a house keeper, cooking up and serving food, cleaning up waste products, and holding everything in place. In recent years the role of glial cells has been expanded somewhat, which leads us to Einstein’s brain:
In 1985 s... | <urn:uuid:7474977f-5636-4256-abf3-1a1577c08edb> | 3.140625 | 236 | Personal Blog | Science & Tech. | 47.547047 |
In Newton’s theory, gravitational effects are simultaneous with their causes: the Sun attracts the Earth towards the Sun’s present position. This is often seen as the reason why Newton was in no position to “frame hypotheses” (about the mechanism or natural process by which gravity acts).
Electromagnetic effects, on th... | <urn:uuid:925716e8-b383-461e-a97f-ddd402a99fe1> | 3.59375 | 1,187 | Academic Writing | Science & Tech. | 35.905894 |
In this page from The Design and Implementation of the 4.4BSD Operating System, it is said that: A major difference between pipes and sockets is that pipes require a common parent process to set ...
I try to write simple client-server program using fork(), pipe() and select(). Parent process is a server, which select p... | <urn:uuid:87942027-4b3c-47cb-89d3-f7adc49fe824> | 2.890625 | 139 | Q&A Forum | Software Dev. | 58.573846 |
By Randolph E. Schmid, Associated Press
WASHINGTON For a change, there's some good news from the world of the environment.
Several rare and vulnerable birds are rebounding in Europe.
Conservation efforts in Peru are reducing damage to the Amazon rain forest.
And black-footed ferrets are making a comeback in Wyoming.
Th... | <urn:uuid:63229de0-09f1-42df-b84d-23f5882f758b> | 2.921875 | 555 | Truncated | Science & Tech. | 44.01744 |
Water: Monitoring & Assessment
5.0 Wetland Algae
Impacts on Quality of Inland Wetlands of the United States:
A Survey of Indicators, Techniques, and Applications of Community Level Biomonitoring Data
Excerpts from Report #EPA/600/3-90/073
(now out of print)
This discussion concerns wetland communities containing phytop... | <urn:uuid:db0bf6b9-6f3d-4b2d-be39-9752e778a0f0> | 3.203125 | 3,232 | Academic Writing | Science & Tech. | 27.498489 |
Science Fair Project Encyclopedia
Amateur astronomy, often called back yard astronomy, is a hobby whose participants enjoy observing celestial objects. It is usually associated with viewing the night sky when most celestial objects and events are visible, but sometimes amateur astronomers also operate during the day fo... | <urn:uuid:e97128a2-3e59-4abc-a597-640f2e8bae21> | 3.671875 | 2,233 | Knowledge Article | Science & Tech. | 33.95804 |
Science Fair Project Encyclopedia
Generally each species of bird has a distinctive style of nest. Nests can be found in many different habitats. Some birds will build them in trees, some (such as eagles, and many seabirds like kittiwakes) will build them on rocky ledges, and some will build them on the ground.
Common n... | <urn:uuid:012cc212-c8b1-48db-ae21-9a72a7da6b0f> | 3.640625 | 263 | Knowledge Article | Science & Tech. | 42.135519 |
SCIENCE IN THE NEWS DAILY
New Wyoming Supercomputer Expected to Boost Atmospheric Science
from the Los Angeles Times (Registration Required)
CHEYENNE, Wyo. -- Here in the shortgrass prairie, where being stuck in the ways of the Old West is a point of civic pride, scientists are building a machine that will, in effect, ... | <urn:uuid:da7c332e-571d-43f5-af86-b38a4aa14bdf> | 3.21875 | 384 | Truncated | Science & Tech. | 46.364526 |
Friday 17 May
Lace coral (Stylaster californicus)
Lace coral fact file
- Find out more
- Print factsheet
Lace coral description
Lace corals form ornate tree-like structures, with all the fine, tapered branches growing in one plane. These delicate fan-like corals are remarkable for their bright colours (2). The colour i... | <urn:uuid:49b4b0e1-8782-484b-8ca6-a01f9f89404b> | 3.359375 | 1,559 | Knowledge Article | Science & Tech. | 36.34254 |
Spotlight on Venice: Climate change a wash in the City of Water
Ahh, Venice – the City of Water. Built on a lagoon along the Adriatic Sea, there must be a looming disaster in store for this lovely, sinking city in the face of climate change. Right?
That was the harsh verdict of the Intergovernmental Panel on Climate Ch... | <urn:uuid:e04b0f7a-32ea-47b0-b99b-16147ae7337f> | 3.578125 | 305 | Personal Blog | Science & Tech. | 45.406073 |
CAMEL Climate Change Education
A free, comprehensive, interdisciplinary, multi media resource for educators I Learn more I Join
The Sun is a beautiful thing to talk about. Without the Sun there is no life for...
Very good article.
Solar forcing is not mentioned in the body of the text. F...
This Is An Interesting Sourc... | <urn:uuid:01e724cd-05ee-4eae-8f96-4d89c48320f1> | 3.359375 | 415 | Content Listing | Science & Tech. | 41.172579 |
NASA has made its choices, and TESS is not one of them. The Transiting Exoplanet Survey Satellite would have used six telescopes to observe the brightest stars in the sky, a remarkable 2.5 million of them, hoping to find more than 1,000 transiting planets ranging in size from Jupiter-mass down to rocky worlds like our ... | <urn:uuid:2781a4c9-4068-460a-8e8e-132ce45223c9> | 3.28125 | 680 | Personal Blog | Science & Tech. | 46.275574 |
- See also: Classical central-force problem
In celestial mechanics, the specific relative angular momentum (h) of two orbiting bodies is the vector product of the relative position and the relative velocity. Equivalently, it is the total angular momentum divided by the reduced mass. Specific relative angular momentum p... | <urn:uuid:a6d46f14-22ce-4f59-a347-400fb373cde6> | 3.609375 | 310 | Knowledge Article | Science & Tech. | 26.87575 |
Irving Rabin is a Senior Consultant for Code Integrity Solutions, a consultancy for static source code analysis professional services. Irving is a former architect at Vitria Technologies, Principal Software Engineer at Openwave, and Research and Development Manager at Platinum Technologies.
C and C++ rely heavily on us... | <urn:uuid:4ba96543-253d-4cdb-ac34-db29d3f6ed7d> | 2.953125 | 618 | Knowledge Article | Software Dev. | 30.865849 |
Climate Change Responses Need Not be All or Nothing
The dialog about climate change, man's role in causing it, and possible responses to limit it or even reverse it, takes on a crisis tone for many. Is this the best way to look at it, and is it the best way to achieve results? For some, this sort of dialog hardens posi... | <urn:uuid:714c0482-15b1-4de2-8ea2-99977a39cc2f> | 2.6875 | 386 | Truncated | Science & Tech. | 42.732225 |
Figure 9. Global methane reservoirs, fluxes,
and turnover times. Major
reservoirs are underlined, pool sizes and fluxes are given in Tg (1012 g) CH4 and Tg CH4 yr-1. Turnover times (reservoir divided by largest flux to or from reservoir ) are in
parentheses. To convert Tg CH4 to moles C, multiply by 6.25 x 1010.
The me... | <urn:uuid:e02f7f8d-8439-4202-b6bd-341b78cb30f5> | 3.734375 | 224 | Knowledge Article | Science & Tech. | 43.188952 |
Name: seth h katz
Date: 1993 - 1999
Why is the sky sometimes red at night and is it similiar to a blue
sky during the day?
No, the red sky you see at dusk is the result of dust and smoke
particles in the air which absorb blue light but allow red light to pass
through.. well, I guess in a way it's similar, since the blu... | <urn:uuid:5033117c-b3c4-4c00-a837-6817cfa79d9c> | 3.0625 | 135 | Q&A Forum | Science & Tech. | 80.465 |
Facts, Identification & Control
Blow flies are often metallic in appearance, with feathery hairs on the terminal antennal segments of the males. Adult blow flies have sponge-like mouth parts, while maggots have hook-like mouth parts.
Behavior, Diet & Habits
Blow flies belong to the Family Calliphoridae of flies under t... | <urn:uuid:e12e46fc-38d2-47e4-881d-5ef459dd210c> | 3.75 | 292 | Knowledge Article | Science & Tech. | 50.516844 |
The papers Einstein wrote in 1905 covered a broad swath—special relativity, electrodynamics, Brownian motion, light quanta. Churned out in less than a year, these ideas had lasting impact: scientists today still devote their lives to evaluating Einstein´s work on gravity, space and time. Einstein isn´t the only scienti... | <urn:uuid:6fc49503-d2c6-44d1-9d7c-b91d92977aa1> | 3.8125 | 854 | Listicle | Science & Tech. | 35.900334 |
Abert’s Squirrel, Sciurus aberti
Abert’s squirrel (Sciurus aberti) is a tree squirrel that is native to the North America. It is also known as the tassel-eared squirrel. Its range extends from the Rocky Mountains all the way into Mexico, with large populations appearing in Colorado, Arizona, New Mexico, and the Grand C... | <urn:uuid:0aab1e20-dd50-42e5-911f-6113d1340541> | 3.453125 | 1,106 | Knowledge Article | Science & Tech. | 54.409562 |
Best known for its role in crafting and commanding spacecraft such as Curiosity, JPL is also home to decades’ worth of accumulated oddities. (p. 32)
Found in: Science & Society
NASA’s rover looks for life-friendly environments. (p. 18)
Planet discovered in Alpha Centauri, just a few light-years away. (p. 23)
Eventual c... | <urn:uuid:63e94ce9-698d-4d96-ae63-991fc6fe96fa> | 2.953125 | 341 | Content Listing | Science & Tech. | 57.233636 |
1 MILLION YEARS: IS THE UNIVERSE LOPSIDED?
Glenn Starkman, physicist at Case Western Reserve University
The heat of the big bang left behind radiation that has permeated the universe ever since. Space probes have mapped this cosmic microwave background, or CMB, over the entire sky and found it to be extraordinarily uni... | <urn:uuid:f3052fd3-736f-4432-8e72-f66827491961> | 3.28125 | 625 | Content Listing | Science & Tech. | 48.504152 |
Half of BC pines dead from fossil fuel pollution. Is it over?
Our earth is overheating at a rate unprecedented in geologic history. BC is overheating twice as fast. The decimation of our pine forests is one of the many eco-collapses emerging from our overheating landscape.
Half our pine trees have been eaten alive in j... | <urn:uuid:f36ebacc-86a3-454f-abdb-f18c26fd0bf8> | 2.78125 | 1,652 | Nonfiction Writing | Science & Tech. | 52.081961 |
The PrivateKey property is used when you want to
authenticate with the server using your private/public key
pair, instead of using Password. This is a
feature that should be supported by all SSH servers.
The Idea of using keys is this: you own a private key (and no one else knows this value). You supply
the server with... | <urn:uuid:4b048a8a-0f81-41ce-ac5f-af2f91104c00> | 2.75 | 858 | Documentation | Software Dev. | 62.765095 |
If the Earth wobble is caused by Earth's magnetic N Pole being pushed violently away each day when it
emerges to face the Sun and the approaching Planet X, then this violent push must be affecting the tides
along the east and west coasts of the N American continent. The land gets pushed, and bounces back,
but water has... | <urn:uuid:77a22495-fd0f-4cd8-b2fb-3f73c2696f4a> | 3.421875 | 2,480 | Comment Section | Science & Tech. | 54.455059 |
Seasons occur because of Earth's changing distance from the Sun
This myth sounds right, but science says otherwise.
Earth experiences seasons because our planet tilts 23.5° with respect to its orbital plane. This statement just means the reason it's summer in the Northern Hemisphere is because Earth's North Pole tilts ... | <urn:uuid:37b42a15-f6a5-400a-9816-349b1df1b215> | 3.875 | 362 | Knowledge Article | Science & Tech. | 61.335985 |
- published: 02 Jul 2012
- views: 24974
- author: nationalacademies
The National Research Council is pleased to present this video that explains how scientists have arrived at the current state of knowledge about recent clima...
|Atmospheric chemistry (category)|
|Tropical cyclone (category)|
|Global warming (category)... | <urn:uuid:8d930fea-e49f-44c8-b6f5-9227ab21050b> | 3.125 | 3,237 | Knowledge Article | Science & Tech. | 26.779553 |
Hummingbirds are incredible flyers, with the ruby-throated hummingbird beating its wings 80 times every second, an ability that inspired this blog’s name. These tiny birds can fly forwards, hover, and are the only known birds to fly backwards as well. But although zooming backwards is the rarest of the hummingbird’s fl... | <urn:uuid:b5ea0d44-759b-4f01-9648-3b388720eb0f> | 3.625 | 316 | Personal Blog | Science & Tech. | 51.112366 |
*pendwill point to the first character in str which follows the representation of the number. If base is
0, the radix will be determined base on the leading characters of str: if str starts with
'0X', radix 16 will be used; if str starts with
'0', radix 8 will be used; otherwise radix 10 will be used. If base is not
0,... | <urn:uuid:cf618d08-906f-44df-a108-7994732d964f> | 2.78125 | 122 | Documentation | Software Dev. | 74.485 |
This is a book about mathematical beauty. Not the facile surface beauty of Lissajous figures or fractals, but a beauty that is visible only to the inner eye. We are in the world of concepts that are almost too simple to understand, whose visible manifestations (polyhedra, wallpaper patterns) are only consequences of th... | <urn:uuid:261bc68f-49d2-436f-ac1a-49866f733083> | 2.6875 | 1,369 | Personal Blog | Science & Tech. | 43.835963 |
New Look at the Infant Universe
From ESA’s HubbleCast. In early 2009, a team of astronauts visited Hubble to repair the wear and tear of twenty years of operating in a hostile environment — and to install two new instruments, the Cosmic Origins Spectrograph, and Wide Field Camera 3 — better known as WFC3.
Hubble has be... | <urn:uuid:8c42506b-01fe-4f2d-b545-e999dee1c30b> | 3.59375 | 425 | Truncated | Science & Tech. | 46.156019 |
Geophysics is the study of the physical properties of the Earth. These include three which we can readily measure from a moving aircraft:
- magnetic field
- electrical conductivity
Geophysicists observe how these properties and their effects vary and interpret the results in terms of underlying geological structures. G... | <urn:uuid:0ba8f6a2-cdbe-4c35-b6e5-d1e3511ac968> | 4.03125 | 804 | Knowledge Article | Science & Tech. | 27.382237 |
The rotifers make up a phylum of microscopic and near-microscopic pseudocoelomate animals. They were first described by John Harris in 1696 (Hudson and Gosse, 1886). Leeuwenhoek is mistakenly given credit for being the first to describe rotifers but Harris had produced sketches in 1703. Most rotifers are around 0.1-0.5... | <urn:uuid:d2960bad-0352-4648-bb5d-d2ef37a014a8> | 3.859375 | 1,038 | Knowledge Article | Science & Tech. | 24.642943 |
Public Function SetBitInStringFast( _
ByVal vString As String _
, ByRef vBit As Long _
, ByRef vValue As Boolean _
) As String
Set a bit within a binary string. Examples:
Bits range from 1 (one is the least-significant-bit) to the number of bits in the value.
SetBitInStringFast(Chr$(255) + Chr$(255), 3, 0) = Chr$(251) ... | <urn:uuid:53045294-0da6-4f1e-ac15-0e5baf596a4a> | 2.921875 | 312 | Documentation | Software Dev. | 64.524847 |
|Sather - A Language Tutorial|
|Prev||Chapter 15. Statement and Expression Catalogue|
We describe below a few special expressions used in Sather - void, void() and the short circuit boolean operations or and and.
A void expression returns a value whose type is determined from context. void is the value that a variable ... | <urn:uuid:b65fd95d-3d47-45f3-bd6d-a1b15efa315c> | 3.9375 | 804 | Documentation | Software Dev. | 57.653231 |
Climate Impacts of Waxman-Markey (the IPCC-based arithmetic of no gain)
Editor Note: Using mainstream models and assumptions, Mr. Knappenberger finds that in the year 2050 with a 83% emissions reduction (the aspirational goal of Waxman-Markey, the beginning steps of which are under vigorous debate), the temperature red... | <urn:uuid:e24bd5ab-c843-4d81-96cf-d6fc0dab32a8> | 2.765625 | 2,390 | Academic Writing | Science & Tech. | 46.884527 |
I have overheard much confusion about local weather and global climate change.
According to the experts at NASA, the difference between weather and climate is a measure of time. Weather consists of the short-term minute- to month-long changes in the atmosphere. Climate is how the atmosphere behaves over relatively long... | <urn:uuid:80015505-2c32-4601-9503-7d3cd42e0d0e> | 3.078125 | 499 | Nonfiction Writing | Science & Tech. | 45.453579 |
How Air Molecules Cause Friction?
Name: Rebecca G.
How do molecules in the air cause air resistance?
Basically, the air molecules just get in the way. Imagine walking through a
crowded room. You have to push people aside or wait for them to move out of
your way. You are forced to move very slowly. Now imagine moving th... | <urn:uuid:df4a2f46-6991-4431-a4e5-26c9d414fe17> | 3.671875 | 616 | Q&A Forum | Science & Tech. | 60.19875 |
15 August 2012
Posted in NatureWorks
The Burmese python is one of the six largest snakes in the world and is native to both tropic and sub-tropic areas of Southern and Southeast Asia. This species was first observed in the Everglades National Park in 1979.
Importation of the Burmese python has led to some rather seriou... | <urn:uuid:0a63af41-6914-4b13-9de6-1574cfa732d5> | 3.671875 | 291 | Knowledge Article | Science & Tech. | 29.990909 |
Making babies requires a male and a female, a sperm and an egg, right? Well, the wild world of animals is often more creative than the lot of us humans when it comes to making whoopee. In fact, some animals don't have sex at all, thank you very much.
Just this month, bug biologists found the first all-female ant specie... | <urn:uuid:475f3828-08c4-457a-b4a7-c0b099612f2c> | 2.8125 | 167 | Truncated | Science & Tech. | 54.834147 |
As you saw in the last section, the derivative of a function measures the function's rate of change, or its slope. To give you a better idea of what a derivative is, imagine that Bob The Crash Test Dummy is driving a car. Bob's car is on fire, which is why his driving is somewhat erratic. The function
models the number... | <urn:uuid:b5ca3c5d-8e45-4cf6-aefc-aebc7e611c3b> | 3.578125 | 1,277 | Tutorial | Science & Tech. | 59.222986 |
from the urls-we-dig-up dept
Civilizations were previously categorized by the materials they used: copper, bronze, iron, steel, plastic, etc. The advancements in material science haven't quite had as much of an impact on society as they used to. Still, there are plenty of really cool materials now that didn't exist jus... | <urn:uuid:9fed636f-eda4-4d1f-9241-5414d6f2b867> | 3.234375 | 331 | Listicle | Science & Tech. | 34.295585 |
As climate changes,
so must the tools to model it
(page 2 of 4)
And including those small components is vital. “We just don’t have a clear understanding of how very fine-scale processes affect the large-scale climate,” says Ben Kirtman, professor of meteorology and physical oceanography at the University of Miami.
Take... | <urn:uuid:438af00b-cdda-4d0b-9292-35d83c04ec3a> | 3.265625 | 495 | Knowledge Article | Science & Tech. | 35.727551 |
An irregular galaxy is the catchall name given to any galaxy that does not neatly fit into one of the categories of the Hubble classification scheme. They have no defined shape nor structure and may have formed from collisions, close encounters with other galaxies or violent internal activity. They contain both old and... | <urn:uuid:b7b1af53-ac2f-4c9a-9886-3b6cf8edd72c> | 3.890625 | 242 | Knowledge Article | Science & Tech. | 38.439876 |
May 22, 2013 9:34 am
Heinrich Rohrer, winner of the 1986 Nobel Prize in Physics, passed away last week at the age of 79. Rohrer is widely regarded as one of the founding scientists of the nanotechnology field.
In his Nobel Prize announcement, the Nobel Prize committee called out “his fundamental work in electron optics... | <urn:uuid:df3d298d-b9c2-4630-8bb9-040d37c6c2cc> | 3.59375 | 2,412 | Content Listing | Science & Tech. | 53.508783 |
Variables must be declared before they are used. Unique names are used to identify variables. Descriptions of
variables are used for them to be defined and for types to be declared. Description is not an operator.
The basic types are:
- bool - boolean values of true and false;
- string - character strings;
- double - d... | <urn:uuid:2d95f7e8-9080-40b6-a0b0-2545328237ce> | 3.375 | 403 | Documentation | Software Dev. | 48.750652 |
Chennubhotla, V S Krishnamurthy and Kaliaperumal, N and Kalimuthu, S (1987) Economically important seaweeds. CMFRI Bulletin, 41 . pp. 3-18.
The plants in the sea other than seagrasses—what we call seaweeds—belong to the simplest group of plants ; the marine algae. With few exceptions, these plants are so simple that th... | <urn:uuid:cf635424-e352-4da8-81f6-a23b5e74ad94> | 2.75 | 243 | Academic Writing | Science & Tech. | 47.986544 |
Wednesday, February 22, 2012 - 06:00 in Earth & Climate
A year on, modellers continue to provide daily forecasts of the likely spread of floating debris washed out into the Pacific by the Japanese Tohoku megatsunami.
- Where will the debris from Japan's tsunami drift in the ocean?Wed, 6 Apr 2011, 10:09:18 EDT
- Floatin... | <urn:uuid:7ab44815-da0f-4959-9c3d-631003d71abf> | 3.34375 | 180 | Content Listing | Science & Tech. | 50.262312 |
GIS analysis, biological samples (soil microorganism, invertebrate and plant), automatic weather station data and vegetation and invertebrate surveys to determine the terrestrial biocomplexity of the McMurdo Dry Valleys
The McMurdo Dry Valleys are the largest area of snow-free land in Antarctica. Managers ability to pr... | <urn:uuid:6d36840d-8926-428e-af9a-303e43031d4c> | 2.96875 | 1,231 | Academic Writing | Science & Tech. | 39.344531 |
The Problems for the IYPT 2012 as published on IYPT.org:
A sequence of identical steel balls includes a strong magnet and lies in a nonmagnetic channel. Another steel ball is rolled towards them and collides with the end ball. The ball at the opposite end of the sequence is ejected at a surprisingly high velocity. Opti... | <urn:uuid:001dd622-ed0e-4f5f-a30c-290f6e5363b1> | 3.4375 | 868 | Content Listing | Science & Tech. | 58.586814 |
NASA has released a stunning simulation video that shows how a single disk galaxy such as the Milky Way develops over a span of 13.5 billion years, beginning with the Big Bang and leading up to today.
A disk galaxy, which is described as a flattened circular volume of stars, is color-coded in this captivating clip to s... | <urn:uuid:1b22715b-aedf-4b03-90d1-12b8e47f520d> | 4 | 186 | Truncated | Science & Tech. | 56.735 |
Implements a data structure for describing a property as a path below another property, or below an owning type. Property paths are used in data binding to objects, and in storyboards and timelines for animations.
Assembly: PresentationFramework (in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.co... | <urn:uuid:23af114c-a8c0-4df0-91d2-9684ffcf5e80> | 3.21875 | 297 | Documentation | Software Dev. | 54.213722 |
Solar Alignment or Earth Orbiting Satellite
Name: Lewis S.
Can a rotating object in earth orbit maintain axial
alignment with the sun? For example: a rotating parabolic photonic
collector, a space station, a solar observing satellite.
Sort of, and for a while. The forces on an object in orbit are pretty
weak, normally,... | <urn:uuid:8c005fe4-12d7-4ee4-81f3-633bc50a06b5> | 3.421875 | 551 | Knowledge Article | Science & Tech. | 46.445937 |
That is, why is the potential energy with the orbitals overlapping less than with the Hydrogen atoms 'independent'. Similarly, why is a noble gas configuration stabler than if an electron were to be removed or added? Is this because pairs of electrons are more stable than single electrons? If so, why?
The pairs of elec... | <urn:uuid:5ac92620-c463-4f83-bb51-c237e206a7c8> | 2.96875 | 149 | Q&A Forum | Science & Tech. | 45.715305 |