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Dec 10, 2008 | 2
A poorly kept secret is now official: the Hubble Space Telescope has discovered carbon dioxide (CO2) in the atmosphere of a planet outside our solar system. That's a first in the study of extrasolar planets, or exoplanets, which have been quite the hot topic this year.
The exoplanet HD 189733 b, roughl... | <urn:uuid:66e5ea29-4cc3-4ac7-a939-1103f17db1f4> | 3.515625 | 726 | Content Listing | Science & Tech. | 37.651164 |
The energy flow in the ecosystem is unidirectional. Sun is the main source of energy. The amount of energy received differs in amount as it depends upon the slope, cloud, latitude and pollutants present in the atmosphere. The energy received in the Varanasi of India is three times more than the energy received in the B... | <urn:uuid:89c1b1ed-fa94-404b-a525-66d788c022b3> | 3.4375 | 430 | Knowledge Article | Science & Tech. | 49.604289 |
XQuery is a standardized language for combining documents, databases, Web pages and almost anything else. It is very widely implemented. It is powerful and easy to learn.
XQuery is replacing proprietary middleware languages and Web Application development languages. XQuery is replacing complex Java or C++ programs with... | <urn:uuid:a5ab6375-0c14-413b-81a6-234db2aedaf4> | 2.921875 | 181 | Knowledge Article | Software Dev. | 31.7025 |
About 68.27% of the values lie within 1 standard deviation of the mean. Similarly, about 95.45% of the values lie within 2 standard deviations of the mean. Nearly all (99.73%) of the values lie within 3 standard deviations of the mean.
In mathematical notation, these facts can be expressed as follows, where x is an obs... | <urn:uuid:5cb1709f-f2ec-4fc8-a317-520a6bc2ee2d> | 3.890625 | 1,156 | Knowledge Article | Science & Tech. | 60.672084 |
I’m often surprised by the fact that many people see monads as the be all and end all of Haskell’s abstraction techniques. Beginners often struggle over them thinking that they’re something incredibly important and complex. In reality though, monads are neither important, nor complex, and that’s what I aim to show with... | <urn:uuid:ce6aa644-962a-48c8-8e68-abdc3dd81e08> | 2.9375 | 2,134 | Personal Blog | Software Dev. | 60.368019 |
Sensitive indicators of environmental quality
Throughout the Chesapeake Bay watershed, you can find salamanders along the watershed's rivers and streams. The Maryland Biological Stream Survey, however, has found that streamside salamanders are not doing as well as they used to. Statewide, the number of salamander speci... | <urn:uuid:78b8f6bb-0978-4261-820b-b7b95768c9b1> | 3.875 | 1,264 | Knowledge Article | Science & Tech. | 29.475872 |
Mentor: Dr. Frank Mallory
[n]Phenacenes are compounds that contain n benzene rings fused together in a zigzag pattern. An example of a phenacene derivative is shown below.
The synthesis of [n]phenacenes is of particular importance for the investigation of whether pseudo one-dimensional versions of the pseudo two-dimens... | <urn:uuid:04aa68c6-6353-4b34-89aa-210a0ae1886f> | 2.765625 | 324 | Academic Writing | Science & Tech. | 29.748449 |
Weather satellites frequently document dust palls blowing westward from Africa’s Sahara Desert across the tropical Atlantic Ocean. Astronauts see these Saharan dust masses as widespread atmospheric haze. The dust can be transported right across the Atlantic Ocean, taking about a week to reach North America (in northern... | <urn:uuid:5159edd0-4f58-4297-b021-c62cfa0492d5> | 4.1875 | 452 | Knowledge Article | Science & Tech. | 30.088447 |
How Do They Reproduce?
Worms have a very interesting method of reproduction. There are no male and female worms – all worms are the same and each produce both sperm cells and egg cells.
When a worm is mature and ready to reproduce, it finds a partner worm. They line up head to head attaching themselves together at the ... | <urn:uuid:9d8dec00-f1c6-4f99-8553-c2e9502cbcd5> | 3.8125 | 537 | Knowledge Article | Science & Tech. | 65.682455 |
Science Fair Project Encyclopedia
Protein structure prediction
Protein structure prediction is one of the most significant tasks tackled in computational structural biology. It has the aim of determining the three-dimensional structure of proteins from their amino acid sequences. In more formal terms, this is the predi... | <urn:uuid:575db5a5-3fcc-4119-abb1-58050e046c17> | 3 | 797 | Knowledge Article | Science & Tech. | 21.030025 |
image credit: Mikhail Matz; image source; larger image
Detecting Fluorescence: Green, Yellow, Orange, and Red in the Deep Sea
To attract prey, this jellyfish fluoresces in the blue light of the ocean. In fluorescence, atoms or molecules absorb light at one wavelength and re-emit light at a longer wavelength, which corr... | <urn:uuid:42d82731-9d08-4747-b7e8-92d81f7b32e5> | 3.4375 | 192 | Knowledge Article | Science & Tech. | 31.475952 |
En EspañolFive major hazards threaten sea turtles, all of which are the direct results of human behavior. As these
pressures increase, they trigger population declines and local extinctions.
It’s estimated that the fishing industry contributes to the death of thousands to tens of thousands of sea turtles each year. Tur... | <urn:uuid:40bbfac4-5db5-4d34-b43f-c5b3ab167018> | 3.828125 | 378 | Knowledge Article | Science & Tech. | 39.610263 |
The Variation of Inductance and Capacitance With Respect to Time
The Variation of Inductance and Capacitance With Respect to Time
We have heretofore established a new pair of dimensional relationships. These the magnetic inductance, L, in Henry, and the electro-static capacity, C, in Farad. Derived from these dimension... | <urn:uuid:bbc4c04f-df4d-4fa8-b913-5a8a4f1c066c> | 2.734375 | 1,578 | Comment Section | Science & Tech. | 43.909219 |
CALIFORNIA has gained a dubious honour. The Sunshine State has lost 91 per cent of its wetlands over the past 200 years, a greater proportion than any other area on Earth, according to the conservation group Wetlands International.
The statistics were released this week in Brisbane at the sixth gathering of the signato... | <urn:uuid:fba9a00b-a187-4597-9ad4-c6c2a31454d5> | 3.453125 | 213 | Truncated | Science & Tech. | 51.37125 |
C++ vs. C
The C++ programming language brings improvements over its predecessor C, but fans of other languages point out that C++ is still not perfect. Over a decade after the 1998 standardization of the C++ programming language, the C++ vs. C debate continues.
Compared to C, C++ has a bunch of new language features wi... | <urn:uuid:bbd4a4d6-da13-48ac-9de4-cb95148b5998> | 3.734375 | 1,173 | Personal Blog | Software Dev. | 39.893954 |
PHOTOCHEMICAL REACTION: AMMONIUM OXALATE AND IODINE
The promotion of a chemical reaction by light is investigated.
This experiment is suitable for first or second-year courses. The effect of light on the reaction between ammonium oxalate and iodine is studied by subjecting samples of the reaction mixture to light from ... | <urn:uuid:0296cbf4-aa71-4313-becc-3fbea09f2b2d> | 3.5 | 941 | Tutorial | Science & Tech. | 48.901213 |
3-D Fly-Through of Cassiopeia A
Narrator (April Hobart, CXC): For the first time, a multiwavelength three-dimensional (3-D) reconstruction of a supernova remnant has been created. This stunning visualization of Cassiopeia A (Cas A), the result of an explosion approximately 330 years ago, uses X-ray data from Chandra, i... | <urn:uuid:198b8c8e-3594-49c5-8ff9-2dd0cf63bd82> | 3.015625 | 188 | Truncated | Science & Tech. | 47.303022 |
Big Picture Science - That's Containment!
We all crave power: to run laptops, charge cell phones, and play Angry Birds. But if generating energy is easy, storing it is not. Remember when your computer conked out during that cross-country flight? Why can’t someone build a better battery?
Discover why battery design is s... | <urn:uuid:7ba715a2-d2d1-43b1-be1b-c37dfb58eb4b> | 2.796875 | 259 | Truncated | Science & Tech. | 42.940498 |
To understand the drivers and consequences of climate change on timescales important to humans, the paleoclimate of ice cores, the glacial system and local climate patterns were analysed from Skinner Saddle. GPR/GPS (8, 35, 200 and 500MHz) survey was carried out to provide an image of the internal layering of the glaci... | <urn:uuid:47b1c370-2ad9-46eb-90de-ba0d18b115ac> | 2.984375 | 183 | Knowledge Article | Science & Tech. | 26.826589 |
Mobile testing has come a long way since the days when testing mobile web applications was mostly manual and took days to complete. Selenium WebDriver is a browser automation tool that provides an elegant way of testing web applications. WebDriver makes it easy to write automated tests that ensure your site works corre... | <urn:uuid:cabdf1f5-3a61-47d5-a688-c52417102a1e> | 2.890625 | 928 | Documentation | Software Dev. | 51.986587 |
From Math Images
- The image to the right is of the character “Flubber” from the 1997 Disney movie of the same title.
Basic DescriptionThe Flubber image rendered is an implicit surface. Implicit equations are useful in computer graphics for representing these smooth shapes which we call implicit surfaces. The character... | <urn:uuid:fc76cbcf-8629-406c-899d-74bf15ba65fa> | 3.703125 | 571 | Knowledge Article | Science & Tech. | 41.771709 |
The following species (possibly) occur in the North Sea, but only the polyp stage is known, the exact medusal stage of each of these species is unknown (Hansson, 1998a).
¥ Tubularia bellis Allman, 1863.
Meduse unknown; polyp occurs in the lower eulittoral and is common in the whole North Sea.
¥ Tubularia indivisa Linna... | <urn:uuid:a83b8386-a359-4eea-9ee4-db8b7ad2c4e5> | 2.6875 | 263 | Structured Data | Science & Tech. | 53.189139 |
Web Programming Tutorials
This is a relatively new section of the site, and I'm in the process of refining and expanding these tutorials. Feel free to browse, but be on the lookout for new tutorials, as well as revisions to existing ones very soon!
Covers a basic introduction to the structure and syntax of this popular... | <urn:uuid:391603b8-b4ee-4726-b237-e7b9c2d09d0b> | 2.8125 | 383 | Content Listing | Software Dev. | 41.85223 |
Derivatives in Coordinates
Let’s take the derivative and see what it looks like in terms of coordinates. Say we have a smooth manifold and a smooth map from an open subset of to another smooth manifold . If is any point, we define the derivative as before.
Now, if is a coordinate patch — even if there isn’t a single co... | <urn:uuid:69b9db8f-e380-4498-b6ae-b5b23548457c> | 2.890625 | 309 | Tutorial | Science & Tech. | 49.917371 |
|NASA's Mark III Spacesuit Although heavier than earlier suit designs (59 kilograms / 130 pounds for the suit and an additional 15 kilograms / 33 pounds for the Portable Life Support System), the Mark III's selling point is its superior mobility. By combining soft suit joints, hard joints, and bearings, expected lunar ... | <urn:uuid:c0d8b1ce-928e-4fc5-bae7-c450eec2435d> | 2.734375 | 1,204 | Knowledge Article | Science & Tech. | 29.057874 |
Take an amusing quiz to learn about unexpected effects of Climate Change. After each multiple choice question, you see if you were right (and the right answer if you weren't).
Add the possibility of incestuous suicidal clownfish to the list of odd results of Climate Change.
Now this is where we are getting into hypothe... | <urn:uuid:eeed48ee-15d5-422e-97f0-2d85f1f259c3> | 2.984375 | 1,890 | Comment Section | Science & Tech. | 50.578563 |
shaking a towel up and down would create what type of wave in the towel
An 80 000-kg airliner is flying at 900 km/h at a height of 10.0 km. What is its total energy (kinetic + potential) if the total was 0 when the airliner was at rest on the ground?
Jane and John, with masses of 53 and 62 , respectively, stand on a fr... | <urn:uuid:18a26721-9243-43f3-bd69-da2102b5d689> | 3.203125 | 810 | Q&A Forum | Science & Tech. | 75.718962 |
Contact: Diana Yates
University of Illinois at Urbana-Champaign
Caption: Ambrose analyzed the teeth of two dozen mammal species found in the same ancient soil layer as Ardipithecus in order to help reconstruct its environment. A modern hippopotamus tooth is pictured.
Credit: Photo by L. Brian Stauffer, U. of I. News Bu... | <urn:uuid:91c2bb82-052b-4e5f-8911-01527f3a0b0b> | 2.96875 | 134 | Truncated | Science & Tech. | 51.494 |
As heroic workers and soldiers strive to save stricken Japan from a new horror—radioactive fallout—some truths known for 40 years bear repeating.
An earthquake-and-tsunami zone crowded with 127 million people is an unwise place for 54 reactors. The 1960s design of five Fukushima-I reactors has the smallest safety margi... | <urn:uuid:cb521cec-8acc-47d7-8dbf-4dfaa6e3dd3f> | 2.75 | 1,759 | Nonfiction Writing | Science & Tech. | 45.221106 |
Applications and libraries/Interfacing other languages/Erlang
(simple tutorial on using the Erlang FFI)
m (removed invalid link)
|Line 1:||Line 1:|
== Overview ==
== Overview ==
The [http://hackage.haskell.org/cgi-bin/hackage-scripts/package/erlang Haskell/Erlang-FFI]
The [http://hackage.haskell.org/cgi-bin/hackage-scr... | <urn:uuid:02819692-cc0e-4186-be62-70e806fa2e8f> | 3.21875 | 1,139 | Documentation | Software Dev. | 41.948429 |
- From: Duff, A. Wilmer, A Text-Book of Physics, 5th
ed., P. Blakiston's Son & Co., Philadelphia (1921) pp. 418-9.
- © Copyright 1998 R. Paselk
- 473. Standard Cells for E.M.F. Determinations. - In calibrations with the potentiometer
it is necessary to have a "normal" or "standard"
cell of known and constant e.m.f. The... | <urn:uuid:97ffca7c-4e35-406f-9316-fd0c78e16ba4> | 3.234375 | 386 | Knowledge Article | Science & Tech. | 85.679434 |
Understanding how much global warming pollution is being emitted and where those emissions are coming from is an important step to reducing emissions in Oregon. It also provides a baseline for measuring progress as the state strives to reduce its emissions.
What is Oregon’s carbon footprint?
If you account for the gree... | <urn:uuid:75246645-0ab0-4bfc-a334-0cf3b332204a> | 3.28125 | 529 | Knowledge Article | Science & Tech. | 30.715581 |
How's this for impressive: a genome pieced together from a 30,000-year-old finger bone contains fewer errors than genomes generated using samples from living people. The genome, published online today, is from an extinct group of hominins called the Denisovans.
Fossils of the Denisovans, close relatives of the Neandert... | <urn:uuid:d1abe710-ed86-4f07-8d82-38818659a01a> | 3.6875 | 317 | Truncated | Science & Tech. | 32.69606 |
Chicken Egg Shape
Can a chicken egg come out round with no point?
The shape of a chicken's egg can vary a lot, depending on the size, age and health
of the chicken,
My very small and VERY old (nearly 12 years) silky bantam lays eggs very
occasionally - only about one a month. Her eggs are very small, about the size of
... | <urn:uuid:8be1cd84-6487-4b78-93ba-c49f152a6d5b> | 3.28125 | 335 | Knowledge Article | Science & Tech. | 61.191737 |
Get flash to fully experience Pearltrees
Linux is a Unix-like computer operating system assembled under the model of free and open source software development and distribution; its development is one of the most prominent examples of free and open source software collaboration, which allows its underlying source code t... | <urn:uuid:3c8325ef-3452-4df9-92fa-dd0dd0f7e812> | 2.859375 | 636 | Content Listing | Software Dev. | 44.127564 |
In 2006, an article appeared in Science magazine reconstructing the temperature of the Northern Hemisphere back to 800 AD based on 14 smoothed and normalized temperature proxies (e.g., tree ring records). Osborn and Briffa proclaimed at the time that “the 20th century is the most anomalous interval in the entire analys... | <urn:uuid:1c7cfbac-ecc1-4acf-8552-380ab5f3387a> | 3.40625 | 1,529 | Nonfiction Writing | Science & Tech. | 45.585936 |
by Doris Schattschneider, Moravian College, Bethlehem, Pennsylvania
(from the Discovering Geometry NEWSLETTER, vol. 7, no.,1, Spring 1996)
It is easy to show that every triangle tessellates and every quadrilateral
tessellates. One way is to simply rotate the polygon by 180 degrees about
the midpoints of each of the fig... | <urn:uuid:90b37872-cde7-4874-a97f-2aa09149f9d6> | 3.984375 | 758 | Knowledge Article | Science & Tech. | 38.255958 |
History and Production
The name is derived from radium. It was discovered in 1900 by F.E. Dorn who called it radium emanation. It was first isolated and studied in 1902 by E. Rutherford and F. Soddy. In 1908, W. Ramsey has also isolated the element and named it niton. He had determined the density and found it to be th... | <urn:uuid:45538e92-0f38-4111-949c-dfd5b43ef980> | 3.625 | 425 | Knowledge Article | Science & Tech. | 68.808846 |
For those of you still looking for costume ideas this in from May 6th issue of Nature:
Astronomy: Dust-filled doughnuts in space
Julian Krolik, of Johns Hopkins University, is currently at the Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, UK.
The first images of an extragalactic object to have been capture... | <urn:uuid:3c3e6e76-8ef5-4453-b804-70e238b57bf6> | 2.765625 | 1,253 | Comment Section | Science & Tech. | 38.551309 |
Instructions: First print copies of Exercise 4, Lag-time questions, and Real-time questions. Read the text and examine the images. Write answers to the questions on your copies. When you are satisfied with your answers, type them into the computer and submit. Keep the copies as a study guide.
The ocean is not a homogen... | <urn:uuid:b084f1c7-f8b9-4f8b-9f41-13e3abe00562> | 4.375 | 1,344 | Tutorial | Science & Tech. | 47.212029 |
Science Community at the DRC. A Digital Resource Commons (DRC) community containing three collections:
Bird Sounds from the Borror Laboratory of Bioacoustics,
The Borror Laboratory houses one of the largest collections of recorded animal sounds in the world. Founded by the late Dr. Donald Borror, Professor of Entomolog... | <urn:uuid:04a4bece-0d44-45e8-b520-abcb98f37a1a> | 3.046875 | 252 | Content Listing | Science & Tech. | 21.042338 |
This document was created by man2html using the manual pages.
Section: Linux Programmer's Manual (2)
Return to NetAdminTools
accept - accept a connection on a socket
int accept(int s, struct sockaddr *addr, socklen_t *addrlen);
function is used with connection-based socket types
It extracts the first connection request... | <urn:uuid:d7e798cd-b5dc-4a43-94e4-07e17c344c40> | 2.890625 | 1,424 | Documentation | Software Dev. | 45.378264 |
Photon wave functions
The fundamental building block of the theory of photons is the wave function for a single photon. A detailed study of the properties of a photon wave equation and its solutions has been made in a recent work that considers both classical and quantum solutions of the Maxwell equations. Properties t... | <urn:uuid:79de30bc-cd7e-4415-99bf-84b3da26c5dd> | 3.171875 | 501 | Knowledge Article | Science & Tech. | 52.421731 |
Some students have been working out the number of strands needed for different sizes of cable. Can you make sense of their solutions?
The triangle OMN has vertices on the axes with whole number co-ordinates. How many points with whole number coordinates are there on the hypotenuse MN?
A game for 2 players
The aim of th... | <urn:uuid:4b6940dc-2c92-4735-8e54-5d5fc8c36196> | 3.640625 | 1,719 | Content Listing | Science & Tech. | 74.1028 |
Jan 19, 2001, 11:34 AM
Post #1 of 1
(From the Perl FAQ)
What machines support Perl? Where do I get it?
The standard release of Perl (the one maintained by the perl development team) is distributed only in source code form. You can find this at http://www.perl.com/CPAN/src/latest.tar.gz, which in standard Internet forma... | <urn:uuid:82dbe679-cbe1-4bfa-8052-5768fba6ff53> | 2.6875 | 334 | Comment Section | Software Dev. | 68.016458 |
Thursday, March 5, 2009
The generation of giant dunes explained
Ever climbed up a 200+ ft dune (I know some of you have from your memes ...) and wondered how it formed?
Well, a new paper in Nature explains the controls on giant dune size. Andreotti et al. (2009) use a combination of field measurements and aerodynamic c... | <urn:uuid:c8293268-f903-4da2-8d81-bf45a69f5a13> | 3.0625 | 316 | Personal Blog | Science & Tech. | 47.461731 |
Simple explanation and facts about asteroids and meteoroids.
The space between Mars and Jupiter is so great that early astronomers thought there might be a planet there. They did not find any, but instead they found small planet like bodies called asteroids. Asteroids are solid, rocklike masses with irregular shapes, s... | <urn:uuid:6145c011-1e2c-4641-818c-c56cccc47a09> | 4.1875 | 675 | Knowledge Article | Science & Tech. | 53.3085 |
Stuck in someone else's frames? break free!
MAKING MINERAL DEPOSITS
The following activities demonstrate the formation of mineral deposits on the surface and in the interior of the earth.
a. Salt deposits can be found in various locations on the earth's surface. To show how they may be formed, put a small amount of sal... | <urn:uuid:67781a79-d0ee-4d1a-9c8c-6af4f5a9d372> | 3.625 | 552 | Tutorial | Science & Tech. | 58.847029 |
This week researchers announced that a solar storm is coming — the most intense solar maximum in fifty years. The prediction comes from a team led by Mausumi Dikpati of the National Center for Atmospheric Research (NCAR). “The next sunspot cycle will be 30% to 50% stronger than the previous one,” she says. If correct, ... | <urn:uuid:e0a2d68a-895f-472d-ab69-7e6754341297> | 3.015625 | 187 | Personal Blog | Science & Tech. | 63.758879 |
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:17daf35c-7411-4205-ad88-5778c88f7de5> | 2.703125 | 366 | Content Listing | Science & Tech. | 41.202201 |
This is a PowerPoint presentation for class lecture and discussion lasting one hour to one & one-half hours, depending upon the instructor and depth of coverage. As an introduction to crude oil and the environmental impacts of crude oil spills, students will learn about the chemical composition of crude oil, basic term... | <urn:uuid:6e3f5dfd-715f-4974-9c3c-f49f70a22df8> | 3.875 | 506 | Tutorial | Science & Tech. | 20.619093 |
Understanding Past Weather to Improve Future Predictions
New assimilation method using old weather data is feasible technique for improving forecast models
Climate change on Earth and its possible causes have become major "hot topics" of scientific research over the past few decades. Recently, climate researchers have ... | <urn:uuid:88f8e2da-84c1-47cd-8bfc-35313401c2bb> | 3.625 | 1,501 | Knowledge Article | Science & Tech. | 30.578166 |
java program simulating darts
i need to write a program that does this
You are required to write a simple program that simulates a game of darts. In this, two (or more)
players take turns to “throw“ three darts to reduce their score from 501 down to zero. Each dart
thrown will be simulated by a pair of numbers – the fi... | <urn:uuid:0625578a-4597-49f0-973d-3887b4309293> | 2.765625 | 377 | Q&A Forum | Software Dev. | 70.684353 |
|From George H. Darwin's article "Tides," Encyclopaedia Britannica, IX Ed.,Chicago, 1890. Note that in this graph, time increases to the left. Larger image.|
Tides. This figure shows the tidal record for two weeks (January 1-14, 1884) at Bombay. The tide was recorded on a cylindrical sheet that turned once every 24 hou... | <urn:uuid:64461ae8-04e2-449b-8ade-79c6429f91f7> | 4.4375 | 493 | Academic Writing | Science & Tech. | 62.686543 |
Look up monthly U.S., Statewide, Divisional, and Regional Temperature, Precipitation, Degree Days, and Palmer (Drought) rankings for 1-12, 18, 24, 36, 48, 60-month, and Year-to-Date time periods. Data and statistics are as of January 1895.
Please note, Degree Days are not available for Agricultural Belts
Contiguous U.S... | <urn:uuid:57a6abd1-886b-4547-8d6f-70be897570c4> | 2.84375 | 144 | Structured Data | Science & Tech. | 60.488056 |
There is an interesting anecdote which claims that the amphipod crustacean genus, Phronima, served as the inspiration for the alien queen first seen in James Cameron’s, “Aliens.”
The story seems to originate from David Attenborough’s narration in the “Blue Planet” documentary (Skip to 3:25 in this video for the scene i... | <urn:uuid:fc479b79-072d-432f-91e3-c82641000b07> | 2.71875 | 809 | Personal Blog | Science & Tech. | 50.915169 |
This week we are in a deep freeze in the Montreal area, so it seems somewhat fitting to discuss Arctic spiders. I’ve discussed the life-history of Arctic wolf spiders (Lycosidae) before, specifically in the context of high densities of wolf spiders on the tundra. Much of this work was done with my former PhD student Jo... | <urn:uuid:24e7aa92-fcea-4362-96e5-036e51366690> | 3.015625 | 1,187 | Personal Blog | Science & Tech. | 52.730717 |
© 1996, Astronomical Society of the Pacific, 390 Ashton Avenue, San Francisco, CA 94112.
The awsome spectacle of a brilliant comet, with its long ghostly tail streaming behind it, is a rare event. Usually one appears about once a decade. This past March, many people thrilled to Comet Hyakutake, which passed within a me... | <urn:uuid:ffcb3fef-71e1-4bf3-aff0-fb7bb7837ee0> | 3.890625 | 1,239 | Knowledge Article | Science & Tech. | 55.01101 |
A dynamically loadable library is a dynamic-link library (DLL) on Win32, and an assembly (also a DLL) on the .NET platform. It is a collection of routines that can be called by applications and by other DLLs or shared objects. Like units, dynamically loadable libraries contain sharable code or resources. But this type ... | <urn:uuid:b555df5c-6a1c-4e36-8666-4822b2556d87> | 2.96875 | 744 | Documentation | Software Dev. | 37.900332 |
At least 65 species of native freshwater mussels are found in Missouri waters. These humble shellfish once paved the bottom of rivers in incredible numbers, filtering the water and providing habitat and food for other animals.
Mussel populations, however, have crashed in a relatively short time, raising alarms about th... | <urn:uuid:ea10f5a8-7405-4577-9dcf-04c50b0c0038> | 4.0625 | 505 | Knowledge Article | Science & Tech. | 42.2202 |
S1) Describe, with the aid of a drawing, the main parts of a spiral galaxy like the Milky Way. Where is gas and dust found? Where are globular clusters found? What kind of orbits do halo stars and globular clusters have? What kind of orbits do disk stars have?
S2) In what kinds of gas clouds do you find ionized atoms? ... | <urn:uuid:708dab61-5534-441b-977e-00c412220720> | 3.03125 | 153 | Q&A Forum | Science & Tech. | 69.403007 |
This recent recipient of “Best of what’s New” by “Popular Science” magazine, was not only an innovation to answer queries about the red planet mars, but also a hope to many ignited minds to find life in outer space. Phoenix did its job beautifully and completed its programmed task before dying on Martian sands. The onl... | <urn:uuid:71ae5c46-c73f-425d-8c5d-270b0ab36254> | 3.71875 | 694 | Nonfiction Writing | Science & Tech. | 39.63026 |
The Dimension of a Manifold
One thing that may seem clear at first blush about manifolds actually takes a little thought to be sure about. Specifically, our definition says that each point is contained in some coordinate patch , which comes with a coordinate map . But does the here have to be the same for all points ?
... | <urn:uuid:f0c7f620-10bc-4d00-85a4-2125d39a9647> | 3.421875 | 503 | Personal Blog | Science & Tech. | 50.538525 |
Up to this point, the detectors have told us only about charged particles. But what
about neutral particles? Instead of a track that shows you where the particle went and
how it responded to the magnetic field, the calorimeter
gives you a measurement
of the total energy of the particles hitting it in any direction, reg... | <urn:uuid:2421a334-f63a-421e-919b-4ff8e741953d> | 3.984375 | 999 | Knowledge Article | Science & Tech. | 41.186562 |
The C-Band All Sky Survey (C-BASS) is a project to image the whole sky at a wavelength of six centimetres (a frequency of 5 GHz), measuring both the brightness and the polarization of the sky.
C-BASS employs very sensitive microwave amplifiers, cooled to within a few degrees of absolute zero, and configured to measure ... | <urn:uuid:184dc6c2-0163-4a01-8ba6-c9db35164018> | 3.90625 | 748 | Knowledge Article | Science & Tech. | 33.374352 |
The SeeAlso Markup Language
Fredrik Lundh | May 2005
The SeeAlso Markup Language is a minimal XML dialect that can be used to generate links between different web-based documentation sets. A documentation generator can use one or more SeeAlso files to add outbound links to related documents at other sites. A documentio... | <urn:uuid:a207b739-1eda-45d7-8544-667b6a00e265> | 2.890625 | 877 | Documentation | Software Dev. | 45.42293 |
Feb 17, 2012
Gene flow in wheat: Cultivation trial
Outcrossing potential of GM wheat through pollen dispersal
|Execution||Institute of Evolutionary Biology and Environmental Studies, Zurich|
Type of experiment: Planting trial, measurement of GMO presence
Experimental design and realization:
The outcrossing rate rate be... | <urn:uuid:f581a62a-1b6a-4f03-87c8-e9e430ddd905> | 2.75 | 268 | Knowledge Article | Science & Tech. | 44.959892 |
Cold Weather Fun: Boiling Water Turns to Ice Crystals
In this video, a mug of boiling water is tossed in the air on a very, very cold day. Much of the water immediately freezes into ice. This happens because it takes time for the energy contained in a hot object to be transferred to a cold object. However, the rate of ... | <urn:uuid:f9ce9e2c-04b9-4d68-ab91-15d1e1bf0072> | 2.890625 | 102 | Truncated | Science & Tech. | 50.118828 |
Further to your interview with Brian Hare on the importance of dog domestication to our own evolution (2 March, p 30). We know that human lifestyles changed from hunter-gatherer to pastoralism. This was a crucial step in human cultural evolution.
The practical possibility, and hence probability, of the advent of pastor... | <urn:uuid:45ee9f79-f5c8-477f-83c4-f67b630a0733> | 3.25 | 133 | Truncated | Science & Tech. | 41.095701 |
Some 30,000 light-years away near the chaotic, gaseous region near our galactic center, a team of Japanese researchers has found the strange cosmic feature you see above: a helical molecular cloud twisting across some 60 light years.
The European Southern Observatory’s VISTA survey telescope has turned its eyes inward ... | <urn:uuid:d0dd0c60-4eb4-4f42-9f08-6945e33a264d> | 3.34375 | 509 | Content Listing | Science & Tech. | 51.023632 |
Kelvin temperature scale
Submitted by Jur on Sun, 06/17/2012 - 01:00
The Kelvin temperature scale is linked to the concept of absolute zero.
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Most read this week
10 people with the highest IQ in the world (Infographic)
Video designed to create a strong natural hallucination
13 adverti... | <urn:uuid:37febee9-829d-44c6-8cc3-2a96bab0b44f> | 2.84375 | 195 | Content Listing | Science & Tech. | 35.686731 |
With all the storms in the weekend forecast, why not talk about lightning and thunder? Local WCCO-TV news ran a story on this yesterday, but in my humble opinion, it didn’t tell us much. Some of it even missed the mark. So here we go!
The question was asked: Why does thunder crack and sometimes roll?
Many reasons deter... | <urn:uuid:c587a52a-fd6c-46c6-b531-3c9217108aa1> | 2.734375 | 849 | Personal Blog | Science & Tech. | 64.600858 |
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.
December 31, 1997
Explanation: Some stellar nebulae are strangely symmetric. For example, every major blob of gas visible on the upper left of NGC 5... | <urn:uuid:bfe4c093-d71f-425b-b7bc-2428afb69766> | 3.578125 | 223 | Knowledge Article | Science & Tech. | 56.919778 |
Researchers in the last several years realized that they have overlooked whole classes of genes that do not make proteins. Normally, a short stretch of DNA is translated into an RNA molecule which is then moved to another part of the cell and decoded to make a protein. While the non-protein coding genes also produce RN... | <urn:uuid:8826d170-d0b0-44c0-a575-d637398a0ea6> | 3.75 | 226 | Knowledge Article | Science & Tech. | 42.129301 |
JDK and JRE File Structure
This page provides an introductory overview of the JDK directories and the
files they contain.
Note that the file structure of the JRE is identical to that of the JDK's
This section describes the most important files and directories required to develop applications for the Java platform.(Note... | <urn:uuid:4f830473-0df6-4ac0-98af-27dfba1e7f6c> | 3.046875 | 897 | Documentation | Software Dev. | 43.784 |
Help write the 12 days of aquatic invasive species Christmas (2012 edition)
Enjoy the song and the commentary:
On the twelfth day of Christmas, a canal brought to me: Canals have been a significant source of invasive species into the Great Lakes region. Canals can be an invasion pathway by opening previously unavailabl... | <urn:uuid:c94df3ea-4106-4a73-b44c-2c46766a7d8b> | 3.34375 | 1,367 | Personal Blog | Science & Tech. | 47.086869 |
Remember the first time someone handed you a kaleidoscope and invited you to look inside? You may have heard a rattling in the far end of the brightly-colored cardboard tube as you lifted it to your eye like a spyglass. Perhaps you were skeptical, but when you peered in, you were amazed by the burst of color and intric... | <urn:uuid:f9bd9ec7-6300-49bc-9f67-c397123e69a5> | 2.78125 | 338 | Knowledge Article | Science & Tech. | 46.280952 |
The Effect of Light on Rates of Cloning of the Symbiont-Bearing Acoel Convolutriloba longifissura
The acoel turbellarian Convolutriloba longifissura reproduces primarily by asexual fission and engages in an obligate symbiotic relationship with unicellular algae belonging to the genus Tetraselrnis. The obligate nature o... | <urn:uuid:768547eb-96e1-4532-8bec-e9458eede7fa> | 2.9375 | 522 | Academic Writing | Science & Tech. | 45.142407 |
One Cubic Foot
How humans’ choice to grow just one crop can affect nature’s balance.
A typical terrestrial ecosystem is a living mosaic of hundreds or even thousands of species, balanced on one another’s existence like a biological house of cards. From plants and bugs down to microscopic fungi and bacteria, there’s a w... | <urn:uuid:4869ea7d-fb87-4734-b848-42cb6cb45903> | 2.859375 | 380 | Personal Blog | Science & Tech. | 56.275258 |
Apollo 14 Mission
Science Experiments - Charged Particle Lunar Environment Experiment
The Charged Particle Lunar Environment Experiment was deployed on Apollo 14. It measured electrons and both positively and negatively charged ions near the Moon's surface with energies between 50 and 50,000 electron volts. Less energe... | <urn:uuid:d9a086c7-db86-47bf-85a1-5b03b7001830> | 4.09375 | 224 | Knowledge Article | Science & Tech. | 26.49375 |
Click on the thumbnail at the bottom right of this page to go to the bitmap scan of this document. The text of this document appears immediately below.
ROYAL ASTRONOMICAL SOCIETY OF CANADA Standing Committee on Observational Activities Programme for Solar Eclispe of July 20, 1963 Bulletin No. 5 Basic Observation Progra... | <urn:uuid:592082f1-bcb4-4d47-928c-116d57fae49a> | 2.6875 | 730 | Truncated | Science & Tech. | 39.915918 |
You may have heard about nanotechnology enhanced pants that keep that wine stay away or even a nanotech tennis racket. But if nanotechnology is truly set to revolutionize the world we live in what benefits can the poorest people of the world expect to see?
According to a 2005 study these are the areas we should focus o... | <urn:uuid:118ba6cc-32a8-41c0-b368-f79547513ac1> | 2.890625 | 2,558 | Content Listing | Science & Tech. | 50.031866 |
[Previous] | [Session 15] | [Next]
T. H. McConnochie, B. J. Conrath, D. Banfield, P. J. Gierasch (Cornell U.), M. D. Smith (NASA/GSFC)
We have used Mars Global Surveyor Thermal Emission Spectrometer (MGS TES) data to generate a time series of maps that illustrate the properties of the polar vortices on Mars. This repre... | <urn:uuid:8a25651e-97b1-4a17-9671-0bc8c423a4e5> | 2.8125 | 450 | Academic Writing | Science & Tech. | 41.290951 |
If you thought yesterday's post on the SETMAR gene made for tough reading, you should have tried writing it. I wound up starting it over twice, and still wasn't all that happy with it. I found myself thinking that it would have been much easier if i could assume that everyone knew what a Ka/Ks ratio was, or I could lin... | <urn:uuid:23ee0c9b-9bc7-4cdc-af7a-bbebcac1a6fb> | 3.046875 | 867 | Personal Blog | Science & Tech. | 50.31886 |
This week, Astronomy.com reported some intriguing comet research at Lowell Observatory in Arizona. A Lowell scientist, Dave Schleicher, studies the chemistry of comets. He and his colleagues recently found that Comet 96P/Machholz 1 has a weird chemistry. Machholz is extremely low in a chemical called cyanogen compared ... | <urn:uuid:6282341d-a7d0-4315-9163-b8233130ad7a> | 3.328125 | 1,129 | Comment Section | Science & Tech. | 53.187394 |
Yes. An ice age is a period over tens of millions of years where the Earth is cold enough to produce permanent ice sheets. Since permanent ice sheets currently exist in Greenland and Antarctica, it qualifies the current age to be an ice age. This current ice age began 30 million years ago. Within an ice age there are w... | <urn:uuid:c255f141-5571-4b57-92f7-e9f178d5a261> | 3.703125 | 193 | Q&A Forum | Science & Tech. | 44.035615 |
A collection of starlings is called a “murmuration.” A couple of kayakers in Ireland came across a murmuration. Nature never ceases to amaze and remind us of the importance of curiosity and discovery.
Here’s an excerpt from a study of the phenomenon:
“Bird flocking is a striking example of collective animal behaviour. ... | <urn:uuid:a2ce472c-a6ea-4a62-8a56-664536ce07f8> | 3.46875 | 254 | Knowledge Article | Science & Tech. | 30.281261 |
Prasad, CR and Yoganarasimha, A and Venkateshan, SP and Nagaraju, TG (1979) Technique for measuring the beam shape of pulsed lasers. In: Review of Scientific Instruments, 50 (9). pp. 1161-1162.
Beam.pdf - Published Version
Restricted to Registered users only
Download (168Kb) | Request a copy
A simple technique for the ... | <urn:uuid:7fb727fc-cd09-4c0d-8339-843159bdd62e> | 2.90625 | 250 | Truncated | Science & Tech. | 41.518428 |
Structs (C# Programming Guide)
Structs are defined using the struct keyword, for example:
Structs share almost all the same syntax as classes, although structs are more limited than classes:
Within a struct declaration, fields cannot be initialized unless they are declared as const or static.
A struct may not declare a... | <urn:uuid:be98057e-e601-4a73-bf04-c30b2c2ae018> | 3.65625 | 384 | Documentation | Software Dev. | 42.194684 |
Measurements of any kind, in any experiment, are always subject to uncertainties or errors, as they are more often called. We will argue in this section that the measurement process is, in fact, a random process described by an abstract probability distribution whose parameters contain the information desired. The resu... | <urn:uuid:78d1e573-df41-40df-8c2e-1a0f0b2ea8db> | 2.796875 | 115 | Academic Writing | Science & Tech. | 24.374364 |
Why does this fold create an angle of sixty degrees?
Are these estimates of physical quantities accurate?
How many generations would link an evolutionist to a very distant
Is there a relationship between the coordinates of the endpoints of a line and the number of grid squares it crosses?
Take any prime number greater ... | <urn:uuid:c0623a6f-71b1-49fc-80b0-bf722afaa2a4> | 3.640625 | 396 | Content Listing | Science & Tech. | 54.130309 |
Looking for Signs of Past Water on Mars
The big science question for the Mars Exploration Rovers is how past water activity on Mars has influenced the red planet's environment over time. While there is no liquid water on the surface of Mars today, the record of past water activity on Mars can be found in the rocks, min... | <urn:uuid:a25655d0-215d-4ddc-9fab-b9e72614c05a> | 4.03125 | 316 | Knowledge Article | Science & Tech. | 32.276229 |
In this illustration, we will discuss about the appending the value to the node in XML document.
The createTextNode() method creates a new Text for the specified node as the document element for Text node.
DocumentBuilderFactory class is used to create new DOM parsers and DocumentBuilder is used in code given below for... | <urn:uuid:e6fe1463-61d0-4d76-9a32-f2e51283388b> | 3.375 | 172 | Documentation | Software Dev. | 49.112109 |
Lessons from Past Climate Predictions: Arctic Sea Ice Extent 2012 Update
Posted on 10 October 2012 by dana1981
Last year we examined a few predictions of the September annual Arctic sea ice extent in 2010 and 2011. We now have another year of predictions in the books, and a new record sea ice minimum. The Study of Envi... | <urn:uuid:d2b9826a-02d3-48e1-a3b5-818b029bc5c2> | 2.84375 | 1,723 | Personal Blog | Science & Tech. | 37.289341 |
One way to graph radical functions is to create a table of values and then plot the points. Before starting the table, first determine the domain of the function. Remember, the radical must be greater than or equal to zero. Once this lower limit for input (domain) values is established, create the table of values. When... | <urn:uuid:8f538d7c-03a4-4f06-a7ea-6d9ac33d4249> | 4.65625 | 890 | Tutorial | Science & Tech. | 80.552762 |
climate protection & energy policy
The greenhouse effect is the process by which the atmosphere traps some of the sun’s energy, warming the earth and moderating our climate. A human-driven increase in ‘greenhouse gases’ has enhanced this effect artificially, raising global temperatures and disrupting our climate. These... | <urn:uuid:abe4c827-cf17-4151-b070-36b4796fa259> | 3.890625 | 895 | Knowledge Article | Science & Tech. | 32.4191 |
Page 4 of 6
At this point we have the necessary code to allow the user to plot a default view of the Mandelbrot set. Next we want to let the user select an area by dragging with a mouse and then recomputing the Mandelbrot set so that this selected area is blown up to cover the entire picture box.
To allow the user to m... | <urn:uuid:94a0b221-95dc-4dd6-b581-9c5a822b4087> | 2.90625 | 1,003 | Documentation | Software Dev. | 55.861305 |
Take out a sheet of paper. Pop quiz! (just kidding).
Draw any number of dots on your page.
Now connect the dots with lines, subject to the following
rules: lines may not cross each other as they move
from dot to dot, and every dot on your page must be
connected to every other dot through a sequence of
Now count the num... | <urn:uuid:773856ad-2eee-46c5-8979-fc403ce5e3f7> | 3.671875 | 444 | Tutorial | Science & Tech. | 78.444133 |
CAMEROON is like many countries in west Africa: ecologically rich, economically poor and at war with itself. Its tropical forests and savannas, home to rare black rhinos, elephants, gorillas and a wealth of plant life, are being destroyed as people try to scratch a living from the land.
As such, Cameroon is an ideal ca... | <urn:uuid:2228cf9c-8abd-4361-a6e1-55769d4031b8> | 3.625 | 210 | Truncated | Science & Tech. | 46.830989 |
A GIANT comet spotted between the orbits of Uranus and Neptune is the first object known to have come from an exotic part of the solar system called the inner Oort cloud.
The 100-kilometre-wide lump of ice was spotted two years ago in an oddly eccentric orbit around the sun. The comet is now at its closest point, about... | <urn:uuid:91d0530c-1d4b-447f-a4e9-a52e0d5af976> | 3.609375 | 211 | Truncated | Science & Tech. | 66.44613 |