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Windhunter is a project for hydrogen mass production based on electrolysis of the sea water. It consists of a platform that sustains some wind mills. They produce electricity following that electricity produces hydrogen and oxygen through the well-known electrolysis process. The wind turbines have a power of 2 MegaWatt... | <urn:uuid:39ff2758-2756-4c33-9f37-2d10bc44b36a> | 3.234375 | 422 | Personal Blog | Science & Tech. | 47.978125 |
plant or animal
person, or thing adopted by a group as a representative symbol
terrestrial - living
on or in the ground; not aquatic
- any fresh, marine, or terrestrial crustacean of the order isopoda,
having seven pairs of legs adapted for crawling and has a flattened body
- any marine
or fresh water crustaceans of th... | <urn:uuid:a5306186-9187-4558-b76c-34322653b694> | 3.65625 | 575 | Knowledge Article | Science & Tech. | 40.389309 |
May 1, 2012 On 5 and 6 June this year, millions of people around the world will be able to see Venus pass across the face of the Sun in what will be a once-in-a-lifetime experience.
It will take Venus about six hours to complete its transit, appearing as a small black dot on the Sun's surface, in an event that will not... | <urn:uuid:8ed69503-90e8-44b7-84f0-994f63ec80c4> | 3.859375 | 862 | Truncated | Science & Tech. | 51.800161 |
How are chromosomes ‘painted’?
Your 23 pairs of chromosomes contain around 24,000 pairs of genes. FISH – fluorescent in situ hybridisation – can be used to ‘paint’ chromosomes. Scientists prepare chromosomes on a microscope slide, tag a copy of the gene they want to find with a fluorescing dye and add it to the slide. ... | <urn:uuid:b546ae24-1f75-4d79-95b6-a723c2028e5a> | 3.390625 | 95 | Knowledge Article | Science & Tech. | 51.819183 |
The people in south Asia had no warning of the next disaster rushing toward them the morning of December 26, 2004. One of the strongest earthquakes in the past 100 years had just destroyed villages on the island of Sumatra in the Indian Ocean, leaving many people injured. But the worst was yet to come—and very soon. Fo... | <urn:uuid:db2613b9-457b-405c-a9e8-cf6b3053cdc7> | 4.6875 | 607 | Knowledge Article | Science & Tech. | 59.732901 |
Want to stay on top of all the space news? Follow @universetoday on Twitter
The average Earth surface temperature is 14° C. That’s 287 kelvin, or 57.2° F.
As you probably realize, that number is just an average. The Earth’s temperature can be much higher or lower than this temperature. In the hottest places of the plan... | <urn:uuid:86d90c21-1f3c-4921-a8db-cbd4b6a112ed> | 3.625 | 204 | Knowledge Article | Science & Tech. | 69.944741 |
Science Fair Project Encyclopedia
- Green algae
- land plants (embryophytes)
- non-vascular embryophytes
- vascular plants (tracheophytes)
- seedless vascular plants
- seed plants (spermatophytes)
Plants are a major group of living things (about 300,000 species), including familiar organisms such as trees, flowers, her... | <urn:uuid:b8724c44-5980-4235-935c-5f06d06d99e8> | 3.90625 | 2,280 | Knowledge Article | Science & Tech. | 32.690165 |
Google is now serving up more than a hundred years of photographs from Life Magazine. The pictures of the early days of astronomy are just spectacular. The archives contain images of many astronomers who were critical figures in the development of the field, but who have yet to have telescopes named after them. A large... | <urn:uuid:0146518b-5d1e-4ea6-8a34-c54f34f6df6f> | 3.234375 | 454 | Personal Blog | Science & Tech. | 42.923767 |
Two stories appeared this week with more bad news on climate change. First, a review of 866 papers found that animal and plant species are shifting their ranges northward, while polar species are dying out.
The linked article from the Post included several paragraphs on the economic implications, in this case ski resor... | <urn:uuid:577bcf3c-8dec-4793-b0aa-101996281e00> | 2.6875 | 454 | Personal Blog | Science & Tech. | 48.678987 |
NASA began observing a dust storm on the planet Mars on November 10, 2012. Martian dust storms are the largest such storms in our solar system. Over the century that astronomers have monitored them through telescopes – and now via spacecraft – these periodic storms have been know to rage for months and grow to cover th... | <urn:uuid:79cd84c3-9aea-4123-a05f-43931a24850e> | 4.15625 | 697 | Knowledge Article | Science & Tech. | 50.284294 |
The idea of the hypernova was first proposed by Dr. Bohdan Paczynski of Princeton University
. He wanted to explain the gamma ray burst
s that typically last a few second
s at a time, come from seemingly random
directions in space, and have the potential to produce more energy than anything else in the rest of the univ... | <urn:uuid:db36eb8c-30a7-4887-a53e-acb1c1b6fe92> | 3.765625 | 646 | Personal Blog | Science & Tech. | 48.413299 |
A thermally insulated piston cylinder device initially contains 0.2m^3, 0.8kg of air at 20 degrees Celcius, and the piston is free to move. Now air at 600kPa and 80 degrees Celcius is slowly applied to the device through a supply line until the volume increases by 50 percent. Using constant specific heats and assume ai... | <urn:uuid:ce6c3cc4-87f1-4a5f-8818-9f9cab8a03be> | 2.90625 | 105 | Q&A Forum | Science & Tech. | 62.546395 |
[Numpy-discussion] "Nyquist frequency" in numpy.fft docstring
Sun Jul 11 18:13:44 CDT 2010
Hi! I'm a little confused: in the docstring for numpy.fft we find the
"For an even number of input points, A[n/2] represents both positive and
negative Nyquist frequency..."
but according to http://en.wikipedia.org/wiki/Nyquist_f... | <urn:uuid:c6e88302-6165-4cb7-bee3-07f7c0a9cf58> | 2.875 | 356 | Comment Section | Software Dev. | 65.777796 |
A Villager David has a plot of land of the shape of a quadrilateral. The Village head decided to take over some portion of his plot from one of the corners toconstruct a health center. Suzie Agrees to the above proposal with the condition that he should be given equal amount of land in lieu of his land adjoining his pl... | <urn:uuid:11dedc48-f881-412e-8b75-2d141c022009> | 3.296875 | 89 | Q&A Forum | Science & Tech. | 56.888654 |
4.2. Protoplanetary disks
Contrary perhaps to the expectation that protoplanetary disks would be deeply embedded within the clouds from which they form, and they would therefore be inaccessible to optical observations, HST revealed many dozens of protoplanetary disks ("proplyds"; e.g., Bally, O'Dell and McCaughrean 200... | <urn:uuid:fb27e39a-1e34-46c6-b680-951f862a36ce> | 3.90625 | 882 | Academic Writing | Science & Tech. | 54.068308 |
Formation. Location: The Kimberley, NW Australia. Age: Upper Devonian, Frasnian. 350 million years.
Fig.1. 3D skull of the placoderm Mcnamaraspis
kaprios. Courtesy of Dr.J.Long.
The placoderm fish Mcnamaraspis was approximately
25 cm long and, like other placoderms, had a bony head shield
which was joined to the 'shark... | <urn:uuid:52b23c36-4572-4676-8d64-5939c3bfa069> | 3.328125 | 369 | Knowledge Article | Science & Tech. | 64.118406 |
Common Lisp functions are partial; they are not defined for all possible inputs. But ACL2 functions are total. Roughly speaking, the logical function of a given name in ACL2 is a completion of the Common Lisp function of the same name obtained by adding some arbitrary but ``natural'' values on arguments outside the ``i... | <urn:uuid:4e783bcb-b0d6-4ed1-a695-9ba57331844b> | 2.90625 | 328 | Documentation | Software Dev. | 48.296681 |
Researchers have developed a more reliable approach to synthetic biology, the assembly of genetic 'standard parts' to create an organism with desired traits. They've been able to combine a library of parts with computer models that help predict the behavior of those parts when they're combined in a living system. The a... | <urn:uuid:8df856e8-dda1-417d-9150-71d6625b3871> | 3.25 | 157 | Truncated | Science & Tech. | 38.843448 |
Authors: H. Ron Harrison
Galileo studied bodies falling under gravity and Tycho Brahe made extensive astronomical observations which led Kepler to formulate his three famous laws of planetary motion. All these observations were of relative motion. This led Newton to propose his theory of gravity which could just as wel... | <urn:uuid:d820d5af-039b-44b9-a401-27f9ab572390> | 3.484375 | 222 | Knowledge Article | Science & Tech. | 28.091749 |
Science Fair Project Encyclopedia
Frequency response is the measure of any system's response to frequency, but is usually used in connection with electronic amplifiers and similar systems, particularly in relation to audio signals. Because the human ear is generally not sensitive to phase, the frequency response is typ... | <urn:uuid:5be33dd9-8d72-447b-9917-95699895403d> | 4.46875 | 354 | Knowledge Article | Science & Tech. | 30.682504 |
Image: Cunjevoi Illustration
Cunjevoi can form large colonies on rock platforms. They have a hard outer coat that is often covered in green and brown algae. Cunjevoi have a cylinder-shaped body with two openings at the top. They can grow up to 30 cm in height.
- Andrew Howells
- © Australian Museum
- Common name:
- Sci... | <urn:uuid:16ebf0e7-2953-45c8-993d-d870e5043971> | 3.9375 | 257 | Knowledge Article | Science & Tech. | 54.011849 |
Geodetic Reference Systems
Definition of the various Geodetic Reference Systems and their realizations is not only important with regard to scientific work, but will also be of major importance for the practical applications in the fields of geodesy and navigation if seen against the background of an ever-increasing us... | <urn:uuid:572a17b6-f220-4097-8a87-980eb73f29f7> | 3.6875 | 214 | Documentation | Science & Tech. | 23.702001 |
Double the PressureScience brain teasers require understanding of the physical or biological world and the laws that govern it.
In general, if you have a gas in a container and you double the amount of gas, the new pressure will be double the old pressure. I say "in general" because this isn't exactly true, but it is c... | <urn:uuid:b8ee9860-c7ed-43ec-8f6d-79259c847ee2> | 3.53125 | 396 | Personal Blog | Science & Tech. | 66.143831 |
Hi, Im new to coding im after learnig so that i can build websites for myself and my friends ...Im after some help in coding IE: php,html etc to build basic websites that involve images and text. Thanks
I remember when I first started building websites I had trouble understanding what languages were used for what and h... | <urn:uuid:1deb286a-abc5-4cf5-9bd4-9574fb3a5455> | 2.75 | 637 | Comment Section | Software Dev. | 67.537724 |
Did NASA have a dirty little secret about the Apollo 12 mission? A team of researchers have located and reviewed NASA's archived Apollo-era 16 millimeter film -- and have come up with a definitive answer to the persistent claim in both the press and on the Web that a microbe survived 2.5 years on the moon.
Apollo 12 wa... | <urn:uuid:c97602ef-faa0-4bb6-a20a-e324a6c544e7> | 3.90625 | 1,019 | Nonfiction Writing | Science & Tech. | 39.706186 |
The Coriolis Effect
The Coriolis force comes from the rotation of Earth. Earth spins on its axis at a rate of one rotation per 24 hours. At the equator, this is equivalent to approximately 1,600 km per hour—this is the speed a person standing at the equator experiences. But at the North and South Poles, the speed is ze... | <urn:uuid:9c20f42c-5b5f-4e59-bccf-7f2b13d70696> | 4.03125 | 1,053 | Tutorial | Science & Tech. | 49.474717 |
A directory is a kind of file that contains other files entered under various names. Directories are a feature of the file system.
Emacs can list the names of the files in a directory as a Lisp list,
or display the names in a buffer using the
ls shell command. In
the latter case, it can optionally display information a... | <urn:uuid:db58271f-d93c-4c47-bbd4-c966b7a25c6d> | 3.15625 | 844 | Documentation | Software Dev. | 46.495689 |
Page 3 of 3
Now we come to a sideline in the language paradigm story. There is a lot of talk about dynamic languages at the moment. This is partly because until quite recently the dominant languages Java, C++ and C# were static languages - so it's quite a lot about a reaction to the old guard. The static/dynamic distin... | <urn:uuid:d76751d3-0d58-4de9-95c0-a1ce4412c76b> | 2.90625 | 1,010 | Truncated | Software Dev. | 44.909719 |
This article was published originally on 8/25/2010
Alert readers across Iowa and in neighboring states are asking, "Why are there are so many dragonflies this summer?" I'm not sure what explains this larger-than-normal number of dragonflies but callers are reporting anywhere from "dozens" to "hundreds" of dragonflies f... | <urn:uuid:c09fd244-f0ba-4b95-834a-b95040e33159> | 3.140625 | 399 | Knowledge Article | Science & Tech. | 57.702115 |
A major focus in tissue engineering is to create materials that improve and direct cellular interaction. This interaction can be probed by measuring the relative number of cells adhered to a surface, which is thought to be an important step in the cascade of cellular fate processes such as stem cell renewal or differen... | <urn:uuid:60497062-85c5-4b78-811f-08dd5ae8ef53> | 2.765625 | 304 | Academic Writing | Science & Tech. | 25.978432 |
Can Solar Panels Replace Nuclear Energy?
A traditional view is that solar power is cool and hip but doesn’t have nearly the production muscle that nuclear has. Solar panels are certainly safer than nuclear energy, but will they ever be able to replace nuclear power plants? One blogger, Dan Hahn, seems to think that sol... | <urn:uuid:666f90a6-d7d3-4f3c-81d0-f78433780cc2> | 2.828125 | 483 | Personal Blog | Science & Tech. | 43.469194 |
Special Report - Cultivating Future Technologies
As the year 2000 arrives, many people are looking back in time to determine how the world will change in the next millennium. Science has always played a significant role in society, but according to Dr. Gerry Stokes, who leads Pacific Northwest National Laboratory's Env... | <urn:uuid:c1dccecb-7abb-42bb-ba4e-6eafc25b490f> | 3.421875 | 1,358 | Audio Transcript | Science & Tech. | 52.746225 |
by Staff Writers
Washington DC (SPX) Jun 15, 2012
Two of our Milky Way's neighbor galaxies may have had a close encounter billions of years ago, recent studies with the National Science Foundation's Green Bank Telescope (GBT) indicate. The new observations confirm a disputed 2004 discovery of hydrogen gas streaming bet... | <urn:uuid:7a86fc5e-2416-4f57-970d-e4d60a1a52e9> | 2.6875 | 805 | Truncated | Science & Tech. | 41.044724 |
Lesson 2: Primary Production and Upwelling in the Ocean
Colorful Convection Currents
Materials / Preparation
Review the instructions and video at Easy Science Experiments: Colorful Convection Currents
Each group of students will need:
Groups of two to four
Easy Science Experiments: Colorful Convection Currents includes... | <urn:uuid:4af460aa-762f-4683-bf6f-41f71039e2c4> | 4.09375 | 341 | Tutorial | Science & Tech. | 47.115169 |
Hard shell purple bug at the coast of Puerto Rico
Thu, Feb 26, 2009 at 7:12 PM
I was staying at a hotel on the east coast of the island of Puerto Rico and went to the shore to look at the ocean at around midday. This thing was purple, had a hard shell, did not move at all, about 5 inches long and 3 inches wide. It was ... | <urn:uuid:b118e623-a1a2-48f2-9400-c526bbaad919> | 2.875 | 386 | Comment Section | Science & Tech. | 76.265012 |
w3schools is good place to start learning web technologies before reading any other manual or book. Here I am summarizing the relation among most of XML flavors. I’ll recommend it before starting with w3schools.
In addition of above diagram,
- DTD & XSD both do the same job. But XSD is newer than DTD, in form of XML, a... | <urn:uuid:ce674d14-2b01-4381-9f44-dee8ed4fd00e> | 3.0625 | 252 | Personal Blog | Software Dev. | 77.2535 |
1) cell growth
You should look into chemotherapy and cancer medicine in general. Because chemo is mostly effective because it kills fast dividing cells, this has been worked out reasonably well. the 7-10 year number is not really correct, some cells are replaced a lot more slowly.
This is why hair often falls out in ca... | <urn:uuid:d8e27ed7-8a34-4b64-84aa-17d61e576988> | 2.796875 | 285 | Q&A Forum | Science & Tech. | 52.339461 |
Interesting case. From the wikipedia article, an average white dwarf has a mass of ~0.6 Msun and a radius of ~0.015 Rsun. If we want it to have the same effective temperature as the Sun, and Earth to end up with the same insolation, then the size a of the orbit is determined by the scaling relation
Originally Posted by... | <urn:uuid:d3b3b87d-83e9-49cb-b468-71ed859f82a4> | 3.328125 | 1,063 | Comment Section | Science & Tech. | 64.952609 |
| The Dip Needle is a compass pivoted to move
in the plane containing the magnetic field vector of the earth. It will then
show the angle which the magnetic field makes with the vertical.
The needle must be accurately balanced so that only magnetic torques are exerted on it. Some texts suggest that the dip angle be mea... | <urn:uuid:76a1661c-89cf-47bd-8e0a-26c495acf022> | 4.1875 | 786 | Knowledge Article | Science & Tech. | 50.417341 |
Southern Leopard Frog (Rana sphenocephala)
- The southern leopard frog grows to a length of 2 to 3.5 inches (about 5 to 9 cm). Its color varies from tan to several shades of brown to green. The dorsum (back) is usually covered with irregular dark brown spots between distinct light colored areas. Large dark spots on its... | <urn:uuid:fd96980e-3086-43f3-95d0-b4803516e1e5> | 3.5 | 669 | Knowledge Article | Science & Tech. | 54.859145 |
The experimental evidence collected during the last few years has strongly supported the view that the α particle is a charged helium atom, but it has been found exceedingly difficult to give a decisive proof of the relation. In recent papers, Rutherford and Geiger have supplied still further evidence of the correctnes... | <urn:uuid:6a2988d4-b120-4574-856d-1ccb64753461> | 3.28125 | 2,242 | Academic Writing | Science & Tech. | 49.773656 |
|How did spiral galaxy
510-13 get bent out of shape?
The disks of many spirals are
thin and flat, but not solid.
Spiral disks are loose conglomerations of
billions of stars and diffuse gas all
orbiting a galaxy center.
A flat disk is thought to be created by sticky collisions
of large gas clouds early in the
Warped dis... | <urn:uuid:49b1c263-7fa5-42c0-b697-7147a60e3d9b> | 3.875 | 182 | Content Listing | Science & Tech. | 57.234464 |
What is Cookies?
Interview question and answer by: Hariinakoti
| Posted on: 4/7/2012 | Category: ASP.NET Interview questions
| Views: 702 | | Points: 40
Cookie is a small amount of memory used by webserver with client system.
* The cookie variables will be accesible across different web pages of website towards *client... | <urn:uuid:e3dbea54-319b-4063-bac5-c13670035df0> | 2.9375 | 187 | Q&A Forum | Software Dev. | 39.372425 |
Sphere Packing and Kissing Numbers
Problems of arranging balls densely arise in many
situations, particularly in coding theory (the balls are formed by the
sets of inputs that the error-correction would map into a single
The most important question in this area is Kepler's problem:
what is the most dense packing of sph... | <urn:uuid:fea2ca5c-cf20-4f76-b9e1-3edc485e9b77> | 2.953125 | 1,526 | Content Listing | Science & Tech. | 44.055508 |
HERE‘s the latest on an issue to which not nearly enough attention is paid by government and industry:
A new study looking at 11,000 years of climate temperatures shows the world in the middle of a dramatic U-turn, lurching from near-record cooling to a heat spike.
Research released Thursday in the journal Science uses... | <urn:uuid:0e577c18-ba39-47c9-99b1-c7b9a7130af7> | 2.84375 | 121 | Truncated | Science & Tech. | 53.065202 |
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:44c6c220-b0b7-41c6-bc3d-957d70d5f2f0> | 2.796875 | 144 | Structured Data | Science & Tech. | 60.488056 |
Satellite data suggests that March, 2011 was the coolest in more than a decade. The average worldwide temperature in March was .18 degrees below the 30-year average for the month. It was the coldest March since 1999. February was also cold with temperatures running .03 degrees below the long-term average. Satellites be... | <urn:uuid:cac9379d-97c9-4cd8-8915-863f64fb6294> | 3.875 | 153 | Knowledge Article | Science & Tech. | 34.913214 |
Shale Shocked: ‘Remarkable Increase’ In U.S. Earthquakes ‘Almost Certainly Manmade,’ USGS Scientists Report
A U.S. Geological Survey (USGS) team has found that a sharp jump in earthquakes in America’s heartland appears to be linked to oil and natural gas drilling operations.
As hydraulic fracturing has exploded onto th... | <urn:uuid:55dc7eab-76e0-411f-90d6-503ba50de262> | 3.109375 | 515 | Personal Blog | Science & Tech. | 43.561945 |
AROS is a multitasking operating system. This essentially means that multiple
programs may be run at the same time. Every program running is called a task.
But there are also tasks that are not user-programs. There are, for example,
tasks handling the file-system and tasks watching the input devices. Every
task gets a ... | <urn:uuid:7673a73f-8801-4880-9065-a4adbabd2564> | 2.890625 | 1,625 | Documentation | Software Dev. | 61.993126 |
hi, this is my first post here. Am a little nervous thinking how my post will be. but i will try my best to take you through the topic and make you understand the topic. the topic i will discuss is called "Decorator pattern". i will just discuss when to use the decorator pattern and just the basic concept of decorator ... | <urn:uuid:800cc3b0-0ac4-4945-b6f6-d994be68074d> | 3.171875 | 482 | Q&A Forum | Software Dev. | 60.226167 |
Using static and non static synchronized method for protecting shared resource is another Java mistake we are going to discuss in this part of our series “learning from mistakes in Java”. In last article we have seen why double and float should not be used for monetary calculation , In this tutorial we will find out wh... | <urn:uuid:23db3bb2-76f3-4261-89ab-37b4430f0042> | 3.25 | 454 | Personal Blog | Software Dev. | 27.496129 |
Assembly: System.Xml (in system.xml.dll)
XmlResolver is used to resolve external XML resources, such as entities, document type definitions (DTDs), or schemas. It is also used to process include and import elements found in Extensible StyleSheet Language (XSL) style sheets or XML Schema definition language (XSD) schema... | <urn:uuid:e62b0074-7250-4434-8314-3fccf4f71da8> | 2.890625 | 561 | Documentation | Software Dev. | 37.327043 |
4.3 Physical Basis
So far, the motivation for the GCLF as a standard candle is almost totally empirical rather than theoretical. The astrophysical basis for its similarity from one galaxy to another is a challenging problem, and is probably less well understood than for any other standard candle currently in use. Becau... | <urn:uuid:3af92f83-cf0f-481c-b4c8-c107f2a3f871> | 2.9375 | 520 | Academic Writing | Science & Tech. | 40.514769 |
You are currently browsing the category archive for the ‘Combinatorics’ category.
Sometimes sequences of numbers are defined recursively, so that given the previous terms of the sequence we can find the next term. A classic example of this is the sequence of Fibonacci numbers, where every two consecutive terms determin... | <urn:uuid:6cd7ff11-4326-4fa1-9a67-4b6c632dcf70> | 2.9375 | 379 | Personal Blog | Science & Tech. | 38.804486 |
Quantum system can emit only photons with energy equal (within the uncertainty) to the difference between two energy states.
Even if the atom is in a superposition of energy states
\left|\Psi\right> = C_0 \left|0\right> + C_1 \left|1\right> + C_2 \left|2\right> + \ldots \qquad (1)
with average energy somewhere between ... | <urn:uuid:b33feb16-7bb6-42d7-8b99-6b9496ca2c1b> | 3.125 | 375 | Q&A Forum | Science & Tech. | 46.866902 |
When Precipitation Patterns Change
Part A: What is Drought?
In Lab 3, you learned to interpret climographs to understand a location's normal climate. Another way that climographs can be used is to plot current conditions over a background of the average conditionsthis provides a graphic way to see how the current year ... | <urn:uuid:a0c307c8-239d-46b9-a835-41bb2a32f766> | 3.765625 | 1,148 | Tutorial | Science & Tech. | 49.347593 |
|The H2 Double-Slit Experiment: Where Quantum and Classical Physics Meet|
For the first time, an international research team carried out a double-slit experiment in H2, the smallest and simplest molecule. Thomas Young's original experiment in 1803 passed light through two slits cut in a solid thin plate. In the groundb... | <urn:uuid:d5a97766-4890-4e47-b8ad-668a033e2f72> | 3.46875 | 1,125 | Academic Writing | Science & Tech. | 43.942948 |
Image via Wikipedia
Did you know that some frogs talk with ultra-sound? In ultrasound, the pitch or frequency of the sound is too high for the human ear to hear. Fish and homing pigeons can see electromagnetic fields, ants can see polarised light, insects and rodents can smell pheromones, so why can't some frogs, somew... | <urn:uuid:ec1cf832-4b4c-4628-85cc-09d3ea032a4f> | 2.953125 | 312 | Personal Blog | Science & Tech. | 70.702906 |
A chemical reaction between iron-containing minerals and water may produce enough hydrogen “food” to sustain microbial communities living in pores and cracks within the enormous volume of rock below the ocean floor and parts of the continents, according to a new study led by the University of Colorado Boulder.
Universi... | <urn:uuid:6427b637-36e9-419e-9ed4-2363f843d44f> | 3.484375 | 344 | Content Listing | Science & Tech. | 32.158026 |
Water from the 'tap' [like our 'Green-House-Gas' or GHG emissions] flowing into . . '
the 'bath' [like the global atmosphere], raises the level of the bath-water [like the rate of atmosphere GHG accumulation/concentration] . . . but, the 'bath' is also drained by . . . the 'plug-hole' [like the natural 'sinks for GHG' ... | <urn:uuid:36baadb4-ec9d-4af2-8ca5-d86cafde31e5> | 2.96875 | 850 | Knowledge Article | Science & Tech. | 38.733326 |
UK Germination Toolbox - about the database
The Millennium Seed Bank Partnership has successfully collected and stored seed samples from around 90% of the United Kingdom’s native seed plant species, as a hedge against extinction and as a conservation resource. The ‘missing’ species produce either no seeds at all; or se... | <urn:uuid:18c9526c-1895-4c2e-804e-a442f3f31d81> | 3.625 | 1,649 | Knowledge Article | Science & Tech. | 22.236137 |
The genus Isoetes is easy to recognize, but the distinctions
between species are more challenging. Fortunately we have only
two species in Wisconsin, of the 24 species reported for North
America. The most reliable means of identifying the species of
Isoetes requires observation of the megaspores with a microscope.
Mega... | <urn:uuid:2a49bc1a-9f25-4da7-aba0-fcc8caafae10> | 3.265625 | 175 | Knowledge Article | Science & Tech. | 30.454476 |
Terra/MODIS Color Image of Copahue Eruption Plume Across South America
For the first time since 2000, Copahue is erupting, sending an ash plume across southern South America. So far, the eruption is following the same patterns as the activity that ran from July to October 2000. That activity started with phreatic (wate... | <urn:uuid:531a4ccd-c5e2-4850-bc78-faeee15054be> | 3.390625 | 384 | Personal Blog | Science & Tech. | 47.083548 |
The three major operating systems used today are Microsoft Windows, Apple's Macintosh OS, and the various Unix derivatives. A minor irritation of cross-platform work is that these three platforms all use different characters to mark the ends of lines in text files. Unix uses the linefeed (ASCII character 10), MacOS use... | <urn:uuid:89787f62-14b1-4967-9555-b6fa1113a9f4> | 3.84375 | 257 | Documentation | Software Dev. | 41.155494 |
Contrary to Hollywood’s portrayal of gigantic man-eating sharks, the three largest species of shark spend their time peacefully roaming the ocean’s surface munching on the ocean’s smallest creatures. Basking Sharks, the second largest species of shark, cruise the seas in search of plankton, filtering up to 2,000 tons o... | <urn:uuid:193d0731-0e51-4550-9c1c-07d8b21d053c> | 3.84375 | 469 | Personal Blog | Science & Tech. | 45.40705 |
A 3 digit number is multiplied by a 2 digit number and the
calculation is written out as shown with a digit in place of each
of the *'s. Complete the whole multiplication sum.
When the number x 1 x x x is multiplied by 417 this gives the
answer 9 x x x 0 5 7. Find the missing digits, each of which is
represented by an ... | <urn:uuid:f3089b6d-6bb9-41dd-ba6a-02443ec43614> | 3.25 | 690 | Content Listing | Science & Tech. | 71.074286 |
Tree of Life
This is a tree of life--a diagram that shows how different types of living things, or species, are related. If you follow the lines connecting any two species on the tree, you'll get an idea of how closely related they are. The longer the path is, the more distant the relationship. The 479 species listed o... | <urn:uuid:d9793264-e7aa-404d-b436-b6555ec8d06f> | 3.546875 | 216 | Knowledge Article | Science & Tech. | 52.626002 |
Water Evaporated from Trees Cools Global Climate, Researchers Find
ScienceDaily (Sep. 14, 2011) — Scientists have long debated about the impact on global climate of water evaporated from vegetation. New research from Carnegie's Global Ecology department concludes that evaporated water helps cool Earth as a whole, not j... | <urn:uuid:03518dbf-b4fd-425f-9692-606d2af52def> | 3.609375 | 400 | Truncated | Science & Tech. | 28.781297 |
New Zealand's capital city lies within the earthquake-generating collision zone between two of the Earth's great tectonic plates, and sits on top of one of the zone's most active geological faults - the Wellington Fault.
The Wellington Fault forms distinctive landscape features running right through the central city. I... | <urn:uuid:c2194b69-727d-4f86-9eb1-b7a95200a51f> | 3.625 | 151 | Knowledge Article | Science & Tech. | 48.687805 |
Tropical Waves Characteristics
Interval/Period of 3-4 Days Between Waves
- Lasting from one week to several weeks
- Propagating at 10-15 KT
Wavelength of 2,000-2,500 Km
Extend Vertically Between SFC-5Km
A westward traveling tropical wave manifests quite well on the lower atmosphere. In the absence of satellite imagery,... | <urn:uuid:da0fb17d-4ede-42cd-a8aa-de894f4b95ed> | 3.328125 | 286 | Knowledge Article | Science & Tech. | 36.427526 |
Nereid was discovered in 1949 through Earth-based telescopes. Little is known about Nereid, which is slightly smaller than Proteus, having a diameter of 211 mi (340 km). The satellite's surface reflects about 14% of the sunlight that strikes it. Nereid's orbit is the most eccentric in the solar system, ranging from abo... | <urn:uuid:640e3d2a-53ee-41a9-9398-175795852fa7> | 3.828125 | 128 | Knowledge Article | Science & Tech. | 77.191318 |
Like Alaska's mighty Yukon, a broad river once flowed across Antarctica, following a gentle valley shaped by tectonic forces at a time before the continent became encased in ice. Understanding what happened when rivers of ice later filled the valley could solve certain climate and geologic puzzles about the southernmos... | <urn:uuid:00a1fb6d-3d38-422a-acaa-ee3e5395e692> | 3.46875 | 1,295 | Content Listing | Science & Tech. | 38.968747 |
The data types you have seen so far are all concrete, in the sense that we have completely specified how they are implemented. For example, the Card class represents a card using two integers. As we discussed at the time, that is not the only way to represent a card; there are many alternative implementations.
An abstr... | <urn:uuid:4a0df5e6-d1e2-41d7-8f44-77b24b016a93> | 4.03125 | 1,733 | Documentation | Software Dev. | 60.60727 |
Some of school going kids uses Electricity and Magnetism related science projects Experiments in there school’s science fair. children’s always trying to know that what is a magnet or something about electricity.
Someone can make electricity and Magnetism Science Fair Projects Using Batteries, Balloons etc. these Elect... | <urn:uuid:060c7c0a-7914-4268-ba4d-692994040b5a> | 3.21875 | 116 | Truncated | Science & Tech. | 22.579167 |
More In This Article
Across two decades and thousands of pages of reports, the world's most authoritative voice on climate science has consistently understated the rate and intensity of climate change and the danger those impacts represent, say a growing number of studies on the topic.
This conservative bias, say some ... | <urn:uuid:5ce8478c-0c2e-4d15-bde4-fd6f24bffdfa> | 3.234375 | 689 | Truncated | Science & Tech. | 30.25576 |
The journal Science published a paper this week about the increase and spread of Dead Zones in the world oceans. These Dead Zones are created when large amounts of nutrients decompose and use up all of the oxygen in the water causing mass deaths (literally suffocation) of marine species. There are various causes for th... | <urn:uuid:d8135aa8-d8ac-4e98-a942-9c4571a50e14> | 3.03125 | 483 | Personal Blog | Science & Tech. | 38.377727 |
Air Pollution as Seen From the Skies
From Mt. Etna to China to the Sahara, these striking satellite images of air pollution are from both natural and man-made causes
- By Sarah Zielinski
- Smithsonian.com, April 20, 2010
Mount Etna, on the Italian island of Sicily, is Europe’s most active volcano, having erupted half a... | <urn:uuid:16399f08-cd5e-464e-b7dd-94873f60b037> | 3.140625 | 153 | Truncated | Science & Tech. | 37.703046 |
The getcontext() function accesses a different Context
object for each thread. Having separate thread contexts means that threads
may make changes (such as
getcontext.prec=10) without interfering with
Likewise, the setcontext() function automatically assigns its target to the current thread.
If setcontext() has not bee... | <urn:uuid:dd836b42-b587-4802-a366-4dc7592ec3bd> | 2.6875 | 253 | Documentation | Software Dev. | 43.943062 |
Early last week, I wrote about parallax and distance measurements. This is a follow-up post to that one.
Stellar parallax is very small, and thus correspondingly difficult to measure. The closest star has a parallax of 0.772 arc-seconds (that is nearly 1/4700 of a degree). That is a very tiny angle to measure, and so i... | <urn:uuid:dd7e790e-73c3-4f82-b82e-a22e49919f14> | 3.96875 | 1,691 | Personal Blog | Science & Tech. | 52.922019 |
The efficiency of any application depends on how well memory and garbage collection are managed. The following sections provide information on optimizing memory and allocation functions:
Tracing Garbage Collection
Other Garbage Collector Settings
Tuning the Java Heap
Re-basing DLLs on Windows
Monitoring the Garbage Col... | <urn:uuid:4c7ab6b5-fa80-4636-9639-96c43e580b47> | 3.015625 | 901 | Documentation | Software Dev. | 38.161999 |
Some of Palawan’s reefs are sad reflections of warming ocean temperatures. White skeletons are all that remain of previously colorful and varied coral reefs around the island. The phenomena is known as ‘coral bleaching’, caused by too warm of ocean temperatures.
Scientists cited in the article below hold out hope for t... | <urn:uuid:5e163826-772f-4baf-9ef3-7b93d366dd8b> | 3.65625 | 568 | Personal Blog | Science & Tech. | 38.168048 |
Nov 10, 2009, 6:09 AM
Post #3 of 7
Re: [DivyaG] 'constant' in perl
[In reply to]
Can we define any variable as constant in perl (just like const in C and Java), so that its value cannot be modified throughout the program?
There are two techniques to get unmodifiable values in Perl: `use constant;` and `use Readonly;`
T... | <urn:uuid:9d2ca47b-cb5d-4f04-ad58-90f004e2d4a1> | 2.703125 | 358 | Comment Section | Software Dev. | 66.384231 |
Flying a spacecraft to a far planet, millions of miles away, takes many talented people
working with very special equipment.
In planning the mission, engineers and scientists decide what kinds of instruments ride on
board the spacecraft and what kind of information is gathered. They plan the spacecraft's journey
by mak... | <urn:uuid:b13de43d-8e9f-4df2-8414-7592864b12be> | 4.46875 | 224 | Knowledge Article | Science & Tech. | 33.378675 |
One of the outstanding achievements of 20th Century science was the realisation that the great diversity of nature is based on a handful of elementary particles acting under the influence of only a few fundamental forces. This talk aims to give an overview of the natural forces that shape everything around us and outli... | <urn:uuid:5c6e8595-d959-401d-8022-7f7225a700c5> | 3.03125 | 917 | Content Listing | Science & Tech. | 42.27272 |
The Western Diamond Back Rattle Snake
The western diamond back rattle snake lives in the badlands and semi desert areas of North America, where its tough skin prevents it fromlosing too much moisture. It conserves water by excreting thick paste urine. It adjusts its daily behavior to regulate body heat, alternately bas... | <urn:uuid:ac0d9b25-8172-4a3e-8e20-47e04ad202af> | 3.75 | 673 | Knowledge Article | Science & Tech. | 50.466313 |
International Business Times
Natural climatic changes have led to the total ecosystem collapse of coral reefs, suggest a new report. According to a study by the Florida Institute of Technology, climate shifts have stalled the reef growth in the eastern Pacific for 2,500 years.
The Daily Telegraph
Pacific to shut down t... | <urn:uuid:41da48c3-3502-49fe-928c-8930884ce95e> | 2.6875 | 107 | Content Listing | Science & Tech. | 55.262332 |
[antlr-interest] What do . (period) and Tokens mean in tree grammars?
Harald M. Müller
harald_m_mueller at gmx.de
Sat Dec 29 14:16:13 PST 2007
Sorry that I ask - but I did not find it on the Wiki and not in the ANTLR
book: What do . and Tokens mean in tree grammars?
AFAIK, . means "any complete subtree." - although thi... | <urn:uuid:fbf907f8-5cfd-471c-ad04-918cb363fe58> | 2.6875 | 468 | Comment Section | Software Dev. | 67.344652 |
When the scientists combined the light from two 8-meters telescopes with MIDI, they could simulate the resolving power of a telescope with a diameter of about 100 meters. These observations gave a "visibility function," which measures how resolved a source is: A visibility of 1 happens when a source is completely unres... | <urn:uuid:a7858873-054d-46c0-8286-5073936c357e> | 3.734375 | 193 | Knowledge Article | Science & Tech. | 49.06 |
A hailstone begins as a frozen raindrop or ice crystal. Strong updrafts of warm air and downdrafts of cool air move the frozen particle up and down through different levels of the storm cloud. The hailstone encounters different forms of moisture as it moves, and layers of frozen ice particles accumulate on its surface.... | <urn:uuid:07b2ab16-32ce-4e5d-86ec-d855b1af6ffa> | 2.828125 | 85 | Truncated | Science & Tech. | 52.258137 |
How has the sea ice that surrounds Antarctica varied over the period for which there exist comprehensive satellite data? In what follows, we review what has been learned about the subject -- in the order in which it was learned -- starting with the very first year of the current millennium.
Noting that "Antarctic sea i... | <urn:uuid:cd085c5e-c932-4186-a7bd-51a71a37e27c> | 3.078125 | 3,570 | Academic Writing | Science & Tech. | 55.11015 |
http://phys.org/news/2012-05-lemons-lem ... oxide.html
Making carbon-based products from CO2 is nothing new, but carbon dioxide molecules are so stable that those reactions usually take up a lot of energy. If that energy were to come from fossil fuels, over time the chemical reactions would ultimately result in more ca... | <urn:uuid:a890fe39-22cf-4902-a48a-6b2bd82f7809> | 4.125 | 192 | Comment Section | Science & Tech. | 46.941553 |
Skip to comments.NASA Rocket to Create Clouds Tuesday
Posted on 09/15/2009 6:25:43 PM PDT by Free ThinkerNY
A rocket experiment set to launch Tuesday aims to create artificial clouds at the outermost layers of Earth's atmosphere.
The project, called the Charged Aerosol Release Experiment (CARE), plans to trigger cloud ... | <urn:uuid:4764a0db-a1f4-4608-bb23-d0a63c6db88e> | 3.46875 | 856 | Comment Section | Science & Tech. | 59.388515 |
Simple Equations Introduction to basic algebraic equations of the form Ax=B
⇐ Use this menu to view and help create subtitles for this video in many different languages. You'll probably want to hide YouTube's captions if using these subtitles.
- Let's say we have the equation seven times x is equal to fourteen.
- Now b... | <urn:uuid:0fd4521c-d6c5-4976-a39e-6b54d6f49c8b> | 4.8125 | 2,935 | Truncated | Science & Tech. | 84.041077 |
In this module we need to be a little bit more precise about temperature and heat energy than we have been so far. Heat energy is usually measured in terms of calories. The calorie was originally defined as the amount of energy required to raise one gram of water one degree Celsius at a pressure of one atmosphere. This... | <urn:uuid:a815ae2f-316e-4506-a921-7c7a166c371c> | 4.15625 | 363 | Tutorial | Science & Tech. | 50.643539 |
USING a giant magnetic field, scientists at the University of Nottingham and the University of Nijmegen in the Netherlands have made a frog float in mid-air.
The levitation trick works because giant magnetic fields slightly distort the orbits of electrons in the frog's atoms. The resulting electric current generates a ... | <urn:uuid:00e22c8c-93ca-4955-a9a2-776a0dfdcf69> | 3.484375 | 194 | Truncated | Science & Tech. | 49.86859 |
Oct. 25, 2012 Japan's "triple disaster," as it has become known, began on March 11, 2011, and remains unprecedented in its scope and complexity. To understand the lingering effects and potential public health implications of that chain of events, scientists are turning to a diverse and widespread sentinel in the world'... | <urn:uuid:07ac73c1-a9d5-4499-b883-960463833692> | 3.875 | 656 | Truncated | Science & Tech. | 35.690478 |
A curve of radius 138 m is banked at an angle of 11°. An 762-kg car negotiates the curve at 82 km/h without skidding. Neglect the effects of air drag and rolling friction. Find the following.
(a) the normal force exerted by the pavement on the tires
(b) the frictional force exerted by the pavement on the tires
(c) the ... | <urn:uuid:b19e6075-eff6-45c4-8e41-d7c621e69ae2> | 3.25 | 95 | Tutorial | Science & Tech. | 67.785223 |
Last week's announcement of the discovery of a new particle seemed to answer one of the great outstanding questions in physics. But for those who haven't been immersed in all things LHC, the results were likely to raise all sorts of new questions (along with "what was all the fuss about again?"). So, to help navigate t... | <urn:uuid:774c0b9f-f635-4705-8028-03beced576be> | 3.3125 | 1,850 | Q&A Forum | Science & Tech. | 55.928429 |
Family: Dipluridae, Funnelweb Mygalomorphs view all from this family
Description 1/8" (3-5 mm). Tan to yellowish-brown to reddish-brown, hairy. Large body. Belongs to the group of primitive spiders commonly called tarantulas. Constructs tube-shaped webs.
Habitat Mature coniferous (spruce-fir) forest.
Range Southern App... | <urn:uuid:d7ea8be6-59d4-4342-bb2e-f04a598588b4> | 2.734375 | 265 | Knowledge Article | Science & Tech. | 44.725 |
1 Streams and lazy evaluation (40 points)
We know that comparison sorting requires at least O(n log n) comparisons where were are sorting n elements. Let’s say we only need the first f(n) elements from the sorted list, for some function f. If we know f(n) is asymptotically less than log n then it would be wasteful to s... | <urn:uuid:67b304b1-c964-4636-a74b-4a0ce25fa1ba> | 3.53125 | 876 | Q&A Forum | Software Dev. | 78.829554 |