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Evidence is accumulating to show that the Earth's biosphere extends underground into deep igneous rock formations. In certain formulations, abiotic energy-yielding reactions between reduced rocks and groundwater provide a potential for in situ primary production by anaerobic microorganisms-- thus obviating any dependen... | <urn:uuid:36ad92b3-2c42-406d-bea4-9639a124e0d2> | 3.65625 | 313 | Academic Writing | Science & Tech. | 20.124817 |
Beginning in August 2006 and continuing to the present, a persistent bloom of the red-tide alga, Karenia brevis, has been present in Sarasota Bay and surrounding waters. Cell concentrations have reached levels of several million cells per liter of seawater, indicating a severe red tide event. As point of reference, cel... | <urn:uuid:2a501714-306b-4d7d-a2a9-c5f86203eeac> | 2.765625 | 373 | Knowledge Article | Science & Tech. | 40.891477 |
One of the most often-asked questions about climate data is, “How long a time period do we need to establish a statistically significant trend?”
Statistical significance of trends is an issue which has been dealt with often at this blog and many others. Yet previous posts, at least here, have made general statements an... | <urn:uuid:f48bb80d-7402-4a9b-925d-a6bbc34c216d> | 2.78125 | 1,655 | Personal Blog | Science & Tech. | 53.482186 |
Scientists learn about animals by observing them and from analyzing their DNA. Starting your own field journal
is the first step towards understanding the wildlife in your area. Here's how:
Pick a type of animal or pet to watch in your area. Write down the following information:
Date and time
Draw a picture of the anim... | <urn:uuid:9290b179-1b91-483a-9606-5e71d50ecabc> | 3.203125 | 122 | Tutorial | Science & Tech. | 58.978208 |
Jan. 31, 2013 — The evolutionary history of proteins shows that protein folding is an important factor. Especially the speed of protein folding plays a key role. This was the result of a computer analysis carried out by researchers at the Heidelberg Institute for Theoretical Studies (HITS) and the University of Illinoi... | <urn:uuid:7ad4c8af-a9c1-407c-b4a1-59c0c32c3448> | 4 | 1,159 | Knowledge Article | Science & Tech. | 41.452363 |
Effects of Increases in Atmospheric CO2 and Nitrogen Deposition on the Productivity of the Terrestrial Biosphere
Churkina, G., Brovkin, V., von Bloh, W., Trusilova, K., Jung, M. and Dentener, F. 2009. Synergy of rising nitrogen depositions and atmospheric CO2 on land carbon uptake moderately offsets global warming. Glo... | <urn:uuid:36da9f6a-c390-4955-81f0-25c69dd55984> | 3.09375 | 316 | Academic Writing | Science & Tech. | 32.294406 |
Browser object commands are prefix commands. If you have done your homework, you will instantly recall that the job of a prefix command is to modify the interactive context of the command that follows it. Browser object commands modify the interactive context by placing a reference to their own handler in I.browser_obj... | <urn:uuid:1070ea78-9eeb-4d91-91b6-8990c69f9572> | 3.328125 | 513 | Documentation | Software Dev. | 46.017449 |
A device consisting of n quantum bits allows for operations on superpositions of classical states. This ability to operate simultaneously on an exponentially large number of states with just a linear number of bits is the basis for quantum parallelism. In particular, repeating the operation of Eq. 7 n times, each on a ... | <urn:uuid:b376304b-ec23-427c-b47c-437dbb2f4f8f> | 3.125 | 1,502 | Academic Writing | Science & Tech. | 28.594935 |
Earlier we covered some of the new features of HTML 5, such as canvas, audio and video. In this article we'll cover many of the useful new elements that the specification brings to the table. Please remember, though, that HTML 5 is a work in progress, and not fully supported by many browsers yet.
There are many new ele... | <urn:uuid:56bab796-15bc-417b-97e9-b3ed5daaaade> | 2.6875 | 347 | Documentation | Software Dev. | 59.217289 |
Contact: Lee J. Siegel
University of Utah
Caption: This map shows how mountains surrounding Utah's Great Salt Lake interact with the lake to cause some "lake-effect" snowstorms. Air masses from the north-northwest are channeled by mountains north of the lake so they converge above the lake. The air picks up heat and mo... | <urn:uuid:ee6f149a-c939-4878-8b19-056a0c808d8c> | 3.53125 | 129 | Truncated | Science & Tech. | 37.441869 |
|CHP Home||GenChem Analytical Instrumentation Index|
This doucument introduces the thermodynamics of chemical reactions. To start, imagine the following demonstration: Cold packs contain separate compartments of water and a salt such as ammonium nitrate. When you mix the salt and water the cold pack gets cold. Such a r... | <urn:uuid:8f481f8c-c53e-4d7a-aeb3-2b93a8b8a6a8> | 4 | 1,018 | Academic Writing | Science & Tech. | 63.872193 |
Pulsar science with the SKA
The SKA (Square Kilometre Array) is a planned multi purpose radio telescope with a collecting area approaching 1 million square metres. It will consist of individual elements placed in a 5-kilometre core and in smaller `islands' that extend up to several thousands(!) of kilometres from the c... | <urn:uuid:807f2157-8e0c-4eeb-8f51-a6681bbaccfb> | 3.21875 | 369 | Knowledge Article | Science & Tech. | 49.028496 |
January 26, 2011 in PHP & MySQL
I was recently faced with the situation of needing to enter a dollar amount from a <form> via PHP to a MySQL Database. This may sound like a simple feat, but it resulted in being completely the opposite. The reason being is that when data is “uploaded” into MySQL, it views a comma as bei... | <urn:uuid:de472085-9d02-46b2-8ffd-15eefec05e54> | 2.8125 | 389 | Personal Blog | Software Dev. | 71.798219 |
Thin Layer Chromatography
Gas Chromatography-Mass Spectrometry
Mohrig, pp. 178-187.)
is one of the most useful methods for the separation and purification
of both solids and liquids when carrying out small-scale experiments.
Column chromatography is another solid-liquid technique in which the two
phases are a solid (st... | <urn:uuid:67c2fda5-2141-45ad-b7cd-b773f5cedbfa> | 3.5625 | 271 | Tutorial | Science & Tech. | 40.818986 |
On August 27, 2003, Mars was closest to the Sun, and Earth near its most distant point from the Sun during the time of the Mars opposition. This combination brought the Earth and Mars unusually close together. As a result, Earth and Mars were 34.6 million miles away from each other; the closest they had been in 60,000 ... | <urn:uuid:7395e953-9652-4e33-8e96-14d579b29a68> | 3.359375 | 124 | Knowledge Article | Science & Tech. | 82.145339 |
The Poincaré Conjecture
Imaginestretching a rubber band around the surface of an apple, then shrinking it down slowly. This shrinking could occur without tearing the rubber band or breaking the apple - and the band would never have to leave the surface. However, if this rubber band were to be stretched across, say, a t... | <urn:uuid:dc4cfb11-20a4-455a-802f-6cad965899d0> | 3.046875 | 238 | Personal Blog | Science & Tech. | 46.371304 |
Open Database Connectivity (ODBC) is a widely accepted application-programming interface (API) for database access. It is based on the Call-Level Interface (CLI) specifications from X/Open and ISO/IEC for database APIs and uses Structured Query Language (SQL) as its database access language.
The Connector/ODBC architec... | <urn:uuid:cda0cbff-f036-466e-8725-74d44398775b> | 3.671875 | 884 | Documentation | Software Dev. | 34.149634 |
|Unit system:||SI derived unit|
|Named after:||Heinrich Hertz|
|In SI base units:||1 Hz = 1 s-1|
The hertz (symbol Hz) is the SI unit of frequency defined as the number of cycles per second of a periodic phenomenon. One of its most common uses is the description of the sine wave, particularly those used in radio and au... | <urn:uuid:94a8bc54-8086-4a38-b9f0-458d9f0a4500> | 3.96875 | 2,015 | Knowledge Article | Science & Tech. | 52.45473 |
Time Dilation Gets a Quantum Twist
Quantum vs general relativistic conceptions of time go head-to-head in a proposed table-top test.
October 1, 2012
University of Vienna
The story goes that when Galileo pondered what might happen if you threw two balls of different mass off the leaning tower of Pisa, he realised that t... | <urn:uuid:18473dcc-fa07-467e-a0db-1315c817ad9c> | 3.015625 | 1,961 | Comment Section | Science & Tech. | 40.738637 |
Adult female Bagheera kiplingi eats Beltian body harvested from ant-acacia Photo/R.L. Curry
For ages, ants have had a monopoly on the coveted acacia, protecting the plant from would-be predators in exchange for shelter and food, or so they thought. Skulking in the background, and recently discovered, is an unlikely com... | <urn:uuid:2e067406-bfbf-48d2-ae4f-a1988f947850> | 3.125 | 676 | Personal Blog | Science & Tech. | 45.324392 |
3 October 2008
Marcus Gheeraerts the Younger
The complicated shape of a warped leaf or a human ear can emerge from surprisingly simple rules--cells grow in the right places and create the right stresses. In the 8 August and 10 October issues of Physical Review Letters, researchers mathematically analyze how a growing d... | <urn:uuid:63755ddf-ebc4-4cf5-9845-cd78a8cfc000> | 3.734375 | 846 | Truncated | Science & Tech. | 37.878254 |
On with the demonstration....
Begin with a bar of Ivory soap (or you may want to use a sliver of soap.... you'll see what I mean).
Make the appropriate observations of the soap.
Place the soap on a microwave-safe plate.
|It deflated a little at this point, because my camera's batteries died at this point and I had to w... | <urn:uuid:434db414-43b9-4ec7-a08d-a0f002a251c4> | 3.640625 | 258 | Personal Blog | Science & Tech. | 69.843506 |
The common layman’s definition of topology generally involves rubber sheets or clay, with the idea that things are “the same” if they can be stretched, squeezed, or bent from one shape into the other. But the notions of topological equivalence we’ve been using up until now don’t really match up to this picture. Homeomo... | <urn:uuid:9beeeec0-aba9-4756-a953-8314c60687c3> | 3.578125 | 626 | Personal Blog | Science & Tech. | 50.682655 |
Jake conducted a research project under the supervision of Dr. Davis that was a follow-up to a recent project that involved examining color change in museum specimens of mammals. That project showed how the degree of redness in the coat color of a certain species of bat appears to vary with the age of the museum specim... | <urn:uuid:479a6bec-0fe7-4c4f-8157-fdd874605335> | 2.90625 | 182 | Knowledge Article | Science & Tech. | 38.167222 |
sizeof will return the number of bytes reserved for a variable or data type. The sizeof operator is a compile-time operator that returns an integer value. In other words since it is a compile time operator When the programmer uses the sizeof operator in a expression then the operator do not get compiled into executable... | <urn:uuid:7f03d3c5-70d3-412a-945f-73dfa17ad3ff> | 3.984375 | 176 | Q&A Forum | Software Dev. | 42.488721 |
The planet Venus has an atmosphere containing 92% carbon dioxide and an atmospheric pressure nearly 100 times that of Earth. As a consequence, the greenhouse effect on Venus is enormous. Without that greenhouse effect the planet would be several hundred degrees less hot than it is at the surface. The Earth has very lit... | <urn:uuid:3016abf9-b0e7-4417-8a73-e0251ea3e7d6> | 3.84375 | 374 | Personal Blog | Science & Tech. | 63.208053 |
Joined: 16 Mar 2004
|Posted: Wed Sep 20, 2006 10:11 am Post subject: Space shuttle nanostructures tests
|Space shuttle tests shows live cells influence growth of nanostructures -
implications for sensors, tuberculosis modeling, cell preparation, surgical implant safety.
Far above the heads of Earthlings, arrays of sing... | <urn:uuid:a98cf1d4-7d9e-4b67-ae2b-df3a282f46e1> | 2.890625 | 1,593 | Comment Section | Science & Tech. | 26.068896 |
The scientific name for fleas is Siphonaptera, which comes from the Greek words 'siphon', meaning pipe, and 'aptera', meaning wingless, relating to the sucking mouthparts and wingless condition of fleas.
Fleas are one of the best-known groups of parasitic insect due to their notoriety as pests and their medical and vet... | <urn:uuid:ce73da50-6f56-482e-b7aa-2c21146745d8> | 3.75 | 238 | Knowledge Article | Science & Tech. | 31.403571 |
OBSERVATION OF MICROSCOPIC MAGNETISM
This chapter is devoted to the observation of microscopic magnetism, working out in some detail the most commonly used magnetic techniques. The basic aspects of these techniques are only briefly recalled, and indication is given of relevant text books which will give a sound backgro... | <urn:uuid:3fbf84e5-19d7-4a76-ac3b-461a9cae036c> | 2.96875 | 224 | Truncated | Science & Tech. | 21.233018 |
storm is a popular name for two different seasonal events. One
begins with a clash of warm and cold air and results in the
typical winter storm. The second is born when a hurricane leaves
the tropics and transforms itself into a super powerful version
of a winter storm.
The common winter storm is born when a cool mass ... | <urn:uuid:656b108b-a6bd-4266-b96f-0fc5b46ae60f> | 3.921875 | 886 | Knowledge Article | Science & Tech. | 53.123141 |
23. May 2013Energy and Environment Environment
Household waste always used to end up left untreated in landfills, and the effects of this practice are well-known: these waste disposal sites were quite often ecological "death zones". With the incineration of municipal waste, there was some mitigation of this problem: de... | <urn:uuid:314aebff-d775-4cd0-b039-7dcc5e01e369> | 3 | 767 | Content Listing | Science & Tech. | 27.384598 |
Last week when we were making our flubber and oobleck we noticed something a bit odd when we were looking at our photo-documentation of the experiments. The photos of oobleck and flubber all had a slight blue cast to them. That got us talking about colors in general which led to that classic question -- what makes the ... | <urn:uuid:e98531b3-368c-43d1-aac7-9d2ac0a5f2df> | 3.53125 | 1,204 | Personal Blog | Science & Tech. | 53.433959 |
Beetle leg: Spike Walker, a retired biology lecturer based in Penkridge, England, was striving for visual abstraction when he captured a detail of a Dytiscus water beetle's front leg. Walker used a type of darkfield microscopy in which the object is shot against a blue screen. The blue light shines through the orange o... | <urn:uuid:9b23dd6c-87f9-406b-aaa8-52604c825f5b> | 2.78125 | 415 | Truncated | Science & Tech. | 42.728237 |
Summary: Since 1977, the French space agency has been helping civilian and military authorities understand the precise nature of Un-identified Aerospace Phenomena (PAN). The SEPRA database is comprised of more than 2200 different cases, with some 6000 eyewitness accounts and approximately 100 sightings from aircraft.
T... | <urn:uuid:ae3acb5f-bdca-44af-9f09-79a9a2bfb5bd> | 3 | 1,099 | Knowledge Article | Science & Tech. | 29.391393 |
XftPattern holds a set of names with associated value lists; each name refers to a property of a font. XftPatterns are used as inputs to the matching code as well as holding information about specific fonts.
XftFont contains general font metrics and a pointer to either the core XFontStruct data or a structure holding F... | <urn:uuid:2a15df4e-3efd-4b07-96c3-f04387bdae2e> | 2.8125 | 846 | Documentation | Software Dev. | 53.117789 |
Definition: Partition ("factor") the pattern, x, into left, xl, and right, xr, parts in such a way to optimize searching. Compare xr left to right then, if it matches, compare xl right to left.
Generalization (I am a kind of ...)
string matching algorithm.
See also Knuth-Morris-Pratt algorithm, Boyer-Moore.
Note: [It] ... | <urn:uuid:77c7d753-d239-4385-8f84-c6bf0d18b271> | 3.078125 | 283 | Knowledge Article | Software Dev. | 76.457082 |
In the constellation Virgo
8.5 million times the mass of the Sun
Diameter about three-quarters of the distance from the Sun to Mercury
The supermassive black holes in the hearts of many galaxies form what are known as active galactic nuclei (AGN). The accretion disks around these black holes are especially hot and brig... | <urn:uuid:110cf607-97e5-4983-8021-b765c7c6b0f1> | 4.21875 | 488 | Knowledge Article | Science & Tech. | 51.545203 |
Global environmental challenges
from The Great Debate UK:
-Lord Julian Hunt is visiting Professor at Delft University, and former Director-General of the UK Met Office. The opinions expressed are his own.-
The unusually large rainfall from this year’s monsoon has caused the most catastrophic flooding in Pakistan for 80... | <urn:uuid:ffa01a0b-38ce-4505-ad48-4af00fb5fb14> | 3.046875 | 225 | Personal Blog | Science & Tech. | 51.514329 |
Concept 22 DNA words are three letters long.
The genetic code had to be a "language" — using the DNA alphabet of A, T, C, and G — that produced enough DNA "words" to specify each of the 20 known amino acids. Simple math showed that only 16 words are possible from a two-letter combination, but a three-letter code produc... | <urn:uuid:9a55438d-1729-4e3b-8220-82dabb08382c> | 3.765625 | 220 | Knowledge Article | Science & Tech. | 35.735336 |
Dolichopterys Kosterm., Recueil Trav. Bot. Néerl. 32: 279. 1935.—Type: D. surinamensis Kosterm. [L. surinamensis (Kosterm.) Sandwith].
Woody vines or shrubs (or small trees?); stipules absent or vestigial, 0.2–0.5 mm long, borne on adaxial edges of petiole 1–2 mm above base; leaves opposite or subopposite; lamina dense... | <urn:uuid:67cc52ff-cff6-4e4e-848e-c97289d9a784> | 2.75 | 667 | Knowledge Article | Science & Tech. | 28.605081 |
Learn how biologists conduct freshwater surveys and use these data for ongoing studies and long-term monitoring of freshwater communities.
Biologists research, monitor and record the long-term history and trends of Florida’s freshwater fish populations.
Biologists often arouse the curiosity of onlookers while using thi... | <urn:uuid:c8907542-a3d8-4109-a282-f78fd23f8055> | 2.765625 | 106 | Content Listing | Science & Tech. | 25.054846 |
by James C. McLane III
This article proposes an unusual way to land objects from orbit and probes returning from deep space. I won’t dwell on details best left for future study, but will suggest enough possibilities to encourage more study of the concept. The use of airbags to help spacecraft land on Mars is a recent e... | <urn:uuid:6e3c3727-cfe1-43a8-a668-81a963800a75> | 3.625 | 1,467 | Personal Blog | Science & Tech. | 38.625192 |
Introduced in 1935, the Cane toad (Bufo marinus) is one of the most prominent and successful invasive species in Australia. It was originally introduced from specimens in Hawaii - although the species is native to Central and South America. Without showing any noticeable interest in the cane beetle it was introduced to... | <urn:uuid:756c2e6b-ccfa-453b-bd11-830b3a713dda> | 2.890625 | 168 | Personal Blog | Science & Tech. | 38.311362 |
Alligators are everywhere. They’re team mascots, Transformer toys, actors in Lubriderm commercials (and CSI: Miami), unwanted golfing partners, and even expensive cowboy boots. What might be a surprise is that they’re also “model animals” for scientists, meaning that there are dozens, if not hundreds, of published tech... | <urn:uuid:2e890b31-e47a-4847-baa8-1f48ec4b3c46> | 2.734375 | 557 | Personal Blog | Science & Tech. | 42.611729 |
Coral reefs in the Caribbean Sea and the western Atlantic Ocean have been in a continual state of decline for the last 20 years. Scientists traditionally have looked to human influences as the culprit.
But according to a relatively new scientific study the real problem may be blowin' in the wind.
The demise of coral re... | <urn:uuid:b810db48-65ee-41ab-b7ec-798e465a4a19> | 3.21875 | 2,705 | Knowledge Article | Science & Tech. | 37.747141 |
Pieter J. van Rhijn
Simply begin typing or use the editing tools above to add to this article.
Once you are finished and click submit, your modifications will be sent to our editors for review.
stellar luminosity function
...refers to the absolute number of stars of different absolute magnitudes in the solar neighbourh... | <urn:uuid:f3d7e0bb-0a76-4c54-b00e-392fe5f81701> | 3.234375 | 154 | Knowledge Article | Science & Tech. | 57.658333 |
Summer bushfires near densely-populated areas in southern Australia attract the most public attention, but the continent’s largest and most frequent fires actually occur in the spring in the tropical savannas of northern Australia.
On November 25, 2012, the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard N... | <urn:uuid:b54950c4-39af-4353-b0f1-48e53a6b66bc> | 4 | 521 | Knowledge Article | Science & Tech. | 43.052569 |
You are here
Falling prey to noise
An oceanside log cabin surrounded by a 1,000yearold forest is illuminated by the glow of a computer screen. Even though it’s 2 a.m., Georgie Gemmell is still sitting at the laptop, which rests on a desk cluttered with binoculars, audio cassettes and hand drawn maps. As if in a trance,... | <urn:uuid:f29defdb-cdf3-4846-abcb-add8ac475c79> | 2.6875 | 1,380 | Knowledge Article | Science & Tech. | 50.309821 |
Turns out that a large part of Mars could support life
One of man’s dreams has always to be able to go out into space and find a new home for us to
screw-up live on and one of the places has always been Mars, even though it has been shown to be barren of any kind of life as we know it.
As much as we might like to think... | <urn:uuid:abd55cd7-5273-4f39-abe2-5475e1057404> | 2.84375 | 369 | Personal Blog | Science & Tech. | 53.486754 |
This article has focused on finding the right role for C++ amongst today's other popular languages, and on understanding its most difficult aspect: memory management. The tables of common memory-related errors presented here can be used as a handy reference, to find and avoid such errors in your own code. Subsequent ar... | <urn:uuid:de677245-3723-4c52-8480-718d8dcbb33a> | 2.71875 | 1,205 | Tutorial | Software Dev. | 54.839957 |
|Jun21-12, 09:50 AM||#1|
Spin direction through ferromagnetic material
What is the spin direction of the electrons through the ferromagnetic material?
It will become parallel or antiparallel?
I was confused because the scattering rate and conductivity both depend on the density of state at Fermi level.
For ferromagneti... | <urn:uuid:5a4a34a2-2edc-4c30-ad16-47836980c7e0> | 2.78125 | 274 | Comment Section | Science & Tech. | 32.535756 |
G and H
- Having to do with the galaxy.
- Galactic Cosmic Rays (GCRs)
- These cosmic ray particles come from outside our solar system, but from within our galaxy. They have lost all of their electrons during their trip through the galaxy.
More about GCRs...
One of billions of large systems of stars and gas, held togeth... | <urn:uuid:b7999214-ce41-4226-9985-90a63b9e15b2> | 3.84375 | 663 | Structured Data | Science & Tech. | 52.004469 |
In the type of work that we do, just getting the cells out of the rock or sediment where they were living can be difficult. Many of these organisms are adapted to live at high temperatures and pressures, and live deeply embedded in rock and aren't going to detach just because we scientists want them to. There are chemi... | <urn:uuid:5c1d1d1e-90ae-41ba-8aeb-e65ae39fff6a> | 4.09375 | 1,028 | Personal Blog | Science & Tech. | 57.906286 |
Why the Earth's Temperature Is What It Is
In his first-year seminar titled Energy, Professor Michael Brown’s explanation of the Earth’s temperature begins by calculating the Sun’s radius (Rs), the distance from Sun to Earth (rE-S), and the cross-sectional area of the circle of solar energy that is intercepted by Earth’... | <urn:uuid:ca7b401a-981e-4e65-ba20-e54c74ebde82> | 4.375 | 399 | Knowledge Article | Science & Tech. | 58.253032 |
How did Asexual Life Evolve?
Name: Rob Courtney
It is an accepted fact that all life on Earth began as one-celled
organisms that reproduced asexually, with all offspring identical to the parent
from which they were created. My question is, if all offspring are identical to
their parents, then is there any room for adva... | <urn:uuid:3a5b5454-471c-42b1-80eb-6d1f69231b9d> | 3.453125 | 197 | Q&A Forum | Science & Tech. | 47.070638 |
Volcanic heat at the mid-ocean ridge axis drives hydrothermal circulation and chemical exchange between the ocean crust and seawater. Microbes are known to harness chemical energy from this volcanic system at temperatures as high as 121°C. A mid-ocean ridge hydrothermal system, plume, and resulting deposits and precipi... | <urn:uuid:923e64b4-762b-4384-b81a-26527667198f> | 3.84375 | 1,487 | Knowledge Article | Science & Tech. | 29.930143 |
Posted by musical, a resident of the Palo Verde neighborhood, on Apr 13, 2012 at 3:51 pm
One can spend a lifetime studying lightning. People would be surprised at the amount of lightning research done at Stanford and nearby corporate campuses. Yes, the weather services have accurate techniques for recording every disch... | <urn:uuid:72b31833-7e3d-484c-aa78-fa9c3d45b604> | 3.125 | 541 | Comment Section | Science & Tech. | 48.114021 |
I disagree with the first comment but it's based on biological stuff rather than good perl practice.
An array is an ordered list numerically indexed.
A hash is an unordered
list which is string indexed.
A hash uses far more memory to hold it's data and since you're working with a large file that is loaded into memory, ... | <urn:uuid:81929416-56b2-48aa-86ad-7f306abeb09c> | 2.828125 | 211 | Comment Section | Software Dev. | 66.054446 |
Genus: Highly flattened; pellicle firm; body form constant (Kudo, 1966).
Chloroplasts small, discoid, pyrenoids usually absent; most species flat and leaf-shaped;
often with ridges or fins running helically or longitudinally (Illustrated Guide, 1985).
Species: 80-100 μm; similar to P. longicauda; twisted 40-60 degree (... | <urn:uuid:4a53f893-e5cb-4ba7-a30b-6dd4e87f24bb> | 2.9375 | 113 | Knowledge Article | Science & Tech. | 55.537126 |
The <span class="img_descr" Super Moon
Zhongguang Wang, Beijing, May 7, according to the economic voice of “the world Caijing reported, comparative study? Just yesterday evening, this year’s largest and brightest moon had appeared in the night sky. I wonder if you did not raise my eyes to the moon? This is the moon fro... | <urn:uuid:a09546f5-198b-47b7-a573-589867961442> | 3 | 596 | Personal Blog | Science & Tech. | 59.4557 |
As habitats shift, connections are key for climate-sensitive species.
As the seasons come and go, plant life and carbon change on Earth.
High temperatures in 2010 stressed corals around the world.
See how human activity is changing fire patterns around the world.
How have humans altered Earth's land surface? See it via... | <urn:uuid:3303439f-37a0-4a09-947b-b3bc7181e2e3> | 3.390625 | 133 | Content Listing | Science & Tech. | 53.566071 |
Individual photons can be used to quantum mechanically couple waveguides together as a means to store information and perform calculations. The technique could potentially lead to the production of quantum computers that will be able to solve problems that are far beyond the capability of any conventional computer.
Thi... | <urn:uuid:22462645-8ef6-4cec-8a0f-e8d8b1e41123> | 3.0625 | 162 | Knowledge Article | Science & Tech. | 40.577552 |
|Bioluminescence can be expected
at any region or depth in the sea. It occurs mainly at sea.
It is the only source of light in most of the habitable volume of the ocean.
However, with only a few exceptions, it is not found in freshwater.
The evolution of bioluminescence has occurred many times as is shown by the number... | <urn:uuid:dce1f057-4e24-4cec-8788-602b02bf121a> | 3.671875 | 243 | Knowledge Article | Science & Tech. | 27.710621 |
This was a concept from the 1950s for a Minimum Orbital Unmanned Satellite Earth (MOUSE) vehicle proposed by Professor S.F.Singer of Maryland University. The work “Minimum Satellite Vehicles” was originally presented in 1951 at the Second International Conference on Astronautics in London by three members of the Britis... | <urn:uuid:4da94742-b0ee-47db-818d-89a33843a18a> | 3.609375 | 497 | Knowledge Article | Science & Tech. | 46.691957 |
int vsscanf ( const char * s, const char * format, va_list arg );
Read formatted data from string into variable argument list
Reads data from s and stores them according to parameter format into the locations pointed by the elements in the variable argument list identified by arg.
Internally, the function retrieves arg... | <urn:uuid:45ff5930-8862-4461-af46-ae8c22c4494f> | 3.125 | 432 | Documentation | Software Dev. | 47.96324 |
Permanent Monitoring Panel on Desertification - Report
Given to Seminar on Planetary Emergencies
Problem: The issue of desertification has been debated for a generation. There is little disagreement that there has been an environmental decline in much of the worlds drylands particularly in Africa. However, there has be... | <urn:uuid:3c5fb84f-f29b-4e8d-8b64-f9d1b86cd992> | 3.734375 | 2,047 | Academic Writing | Science & Tech. | 23.610562 |
Motor proteins are molecular motors, which efficiently convert chemical energy stored in ATP into mechanical work, demonstrating the feasibility and applications of nanoscale engines. We are designing hybrid, biomimetic nanodevices and materials based on the motor protein kinesin by merging biotechnology with micro- an... | <urn:uuid:6d84b56c-d325-4c92-9edc-7768cf13b729> | 2.765625 | 408 | Academic Writing | Science & Tech. | 61.459218 |
This page collects examples of concurrent and parallel programming in Haskell.
- Riemann's Zeta function approximation
- Signal that you want to gracefully exit another thread
- Passing messages across a single chan to two readers
- Chat server - using a single channel for a variable number of readers
- Passing IO even... | <urn:uuid:8729ea4a-29d2-441e-91d0-3f8b9a27048f> | 2.8125 | 154 | Content Listing | Software Dev. | 42.11058 |
Measuring instruments used for current observations and data reporting
Land-based (in situ) observations are collected from instruments sited at locations on every continent. They include temperature, dew point, relative humidity, precipitation, wind speed and direction, visibility, atmospheric pressure, and types of w... | <urn:uuid:62f540d5-d16b-4430-94d2-3867f4c857fe> | 3.40625 | 242 | Content Listing | Science & Tech. | 24.065 |
Wed Dec 19 19:59:17 GMT 2012 by Eric Kvaalen
Is the system the researchers built really radar, or does it use shorter wavelengths? A photon of radio-wave radiation has very little energy, so a huge number of photons are emitted by a radar system.
Slightly off topic, but how can a DOI as short as http://doi.org/jz5 spec... | <urn:uuid:53caf86e-dc67-49fe-b9fb-8b6c0593bd94> | 3.046875 | 256 | Comment Section | Science & Tech. | 67.513957 |
|Sep6-12, 10:51 AM||#1|
Properties of reflected light
This may sound stupid, but why when I shine a laser pointer at a mirror and reflect in onto another mirror back and forth, the points of light make a parabola when the mirrors are tilted in such a way as to maximize the number of reflections happening? Tilting the m... | <urn:uuid:d3d115bf-fded-4ee0-be33-b6693aa9fa64> | 3.296875 | 282 | Comment Section | Science & Tech. | 51.775 |
This article was written for a conference on Mathematics and War, Karlskrona, Sweden, August 2002, and appeared as a chapter in the published conference volume Mathematics and War in 2003.
Pages 1 | 2 | 3 | References
Abstract: Alan Turing (1912-1954), British mathematician, was critical in the Anglo-American decipherm... | <urn:uuid:8dc4337a-5e2a-4424-8b6b-903c5a9e4261> | 2.8125 | 2,974 | Academic Writing | Science & Tech. | 35.063594 |
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.
2003 March 10
Explanation: Why do many galaxies appear as spirals? A striking example is M101, shown above, whose relatively close distance of about... | <urn:uuid:5467c544-55ba-474d-bbf6-0f3347469cc4> | 3.8125 | 217 | Knowledge Article | Science & Tech. | 40.512222 |
of the Universe
The most profound insight of General Relativity was the conclusion that the effect
of gravitation could be reduced to a statement about the geometry of spacetime.
particular, Einstein showed that in General Relativity mass caused space to curve,
and objects travelling in that curved space have their pat... | <urn:uuid:caa8d21c-1f4a-4c08-8514-86052b5a8e54> | 4.0625 | 1,152 | Academic Writing | Science & Tech. | 34.567289 |
Higher-order determinants are natural generalizations. The minor of the entry in the th-order determinant is the ()th-order determinant derived from by deleting the th row and the th column. The cofactor of is
An th-order determinant expanded by its th row is given by
If two rows (or columns) of a determinant are inter... | <urn:uuid:b471eb4d-8e67-42f1-911b-809caff517a9> | 2.984375 | 342 | Knowledge Article | Science & Tech. | 51.97489 |
Special & General Relativity Questions and Answers
Is the speed of light a barrier of the same kind as the speed of sound?
First, I do not know of any actual instances where a physicist declared that the speed of sound was some kind of 'wall' that could not be overcome. The speed of sound depends on air temperature, de... | <urn:uuid:3433ff2e-0aad-4b21-920d-541c2daefaa5> | 2.984375 | 302 | Q&A Forum | Science & Tech. | 46.2436 |
The word "nebula," in Latin, means "cloud." Early astronomers believed that nebulae were made up of many dim stars. They tried to separate what they could observe into different stars. This approach worked some of the time, but often they could not distinguish bewtween them. Late in the nineteenth century, the spectros... | <urn:uuid:cd606f6d-75e5-4de1-81c0-44ecc14d07a0> | 4.0625 | 663 | Knowledge Article | Science & Tech. | 45.436513 |
It is known that the area of the largest equilateral triangular
section of a cube is 140sq cm. What is the side length of the cube?
The distances between the centres of two adjacent faces of another
cube is 8cms. What is the side length of this cube? Another cube
has an edge length of 12cm. At each vertex a tetrahedron... | <urn:uuid:e2ced8a0-e9e7-4287-a80d-b5ad59c03a79> | 2.953125 | 192 | Content Listing | Science & Tech. | 63.856233 |
Le Monde tells us (in French) that researchers found 47-million-year-old fossils of nine mating pairs of turtles of species Allaeochelys crassesculpta in a lake in Germany. These fossils, which, according to the researchers, are the only fossils of mating pairs of animals to be found, taught the researchers a lot on th... | <urn:uuid:04287bc0-6af4-4fa7-b7ba-a098b081850e> | 3.46875 | 665 | Personal Blog | Science & Tech. | 40.872126 |
Tropical rainforests, in general, receive between 50 to 250 inches of rainfall each year. Hawaii’s Mount Waialeale is in a class by itself. It's the world's wettest rainforest, averaging 450 inches (that’s more than 37 feet of water) each year.
Most tropical rainforests lie along the equator in the "tropics"—between th... | <urn:uuid:404647f1-c54c-40bb-a58b-614b93102f8b> | 4.375 | 521 | Knowledge Article | Science & Tech. | 39.312256 |
The vectors, (2, -1) and (4, 8), are 1)parallel 2)perpendicular 3)neither parallel or perpendicular
Write the complex number z = 2 + 5i in polar form, rounding to the nearest hundredth if needed.
Convert the complex number c=3cis 0.25 into rectangular form.
Write the complex number z = −6 in polar form
The cost of 4 sc... | <urn:uuid:4542bfa7-d0e7-459a-91fa-2a55cb475e3d> | 2.875 | 289 | Content Listing | Science & Tech. | 102.441054 |
An international team including Lawrence Livermore National Laboratory scientists has definitively measured the spin rate of a supermassive black hole for the first time. The findings, made by the two X-ray space observatories, NASA's Nuclear Spectroscopic Telescope Array (NuSTAR) and the European Space Agency's XMM-Ne... | <urn:uuid:d50c3e26-9d24-456b-a231-595bdb6fc959> | 2.75 | 2,184 | Content Listing | Science & Tech. | 37.927001 |
ScienceFilter: Creationists, crystals, and thermodynamics.
A common red herring argument that I've encountered as advanced by Creationists is that by Newton's Second Law of Thermodynamics
evolution should not be possible. (According to Wikipedia that argument was originated by a biochemist named Duane Gish
, incidental... | <urn:uuid:e808f93e-d628-4e30-a839-0ba8b8783f08> | 2.703125 | 456 | Comment Section | Science & Tech. | 46.293349 |
Global Extinction Within One Human Lifetime As A Result Of A Spreading Atmospheric Arctic Methane Heatwave And Surface Firestorm
Reposted from Arctic News (http://arctic-news NULL.blogspot NULL.com/p/global-extinction-within-one-human NULL.html)
Although the sudden high rate Arctic methane increase at Svalbard in late ... | <urn:uuid:08ca24de-d790-4287-9a9a-9869590a59c6> | 3.09375 | 658 | Truncated | Science & Tech. | 44.457644 |
Showers, Flowers, and Tornadoes
Commercial Agriculture/University of Missouri Extension
The clash of air masses occur over Missouri during spring, especially in April and May, as remnants of winter do not want to let go and summer heat is just around the corner. Thunderstorms are common during this transition season an... | <urn:uuid:5d5fc454-0a8e-414f-afc7-69a1c7a34e82> | 3.5625 | 596 | Knowledge Article | Science & Tech. | 46.043434 |
GTE/TRAnsport and Chemical Evolution over the Pacific
Project DescriptionTRACE-P is part of a long series of GTE aircraft missions aimed at better understanding of global tropospheric chemistry [McNeal et al., 1998]. Over the past two decades, GTE has conducted missions in several remote regions of the world (Amazonia,... | <urn:uuid:974ab5a3-b001-4fe0-9a55-4e658a9e294f> | 3.109375 | 323 | Knowledge Article | Science & Tech. | 34.62045 |
The paradoxical involvement of RNA-mediated gene silencing in the maintenance of some DNA silencing is bridged in Arabidopsis plants by an RNA polymerase that acts as a liaison between both pathways, UK researchers report in the February 3 issue of Science.
Alan Herr, from the John Innes Centre, Norwich, and colleagues... | <urn:uuid:44041f43-a555-42fa-88e1-b03f419d83ce> | 2.71875 | 958 | Academic Writing | Science & Tech. | 29.623024 |
|.: Formations of Natural Catastrophes :.|
Before thunderstorms develop, a change in wind direction and an increase in wind speed with increasing height, creating an invisible, horizontal spinning effect in the lower atmosphere. Warm rising within the thunderstorm updraft tilts the rotating funnel of air from horizonta... | <urn:uuid:48e68ad5-b436-437b-ba87-e1064b0e94b5> | 3.578125 | 118 | Knowledge Article | Science & Tech. | 41.888256 |
Marine Conservation - Conservation of Marine Life and Habitats
Earth Day - April 22
The first Earth Day was celebrated on April 22, 1970. The idea was proposed by Wisconsin Senator Gaylord Nelson amid growing concerns about air and water pollution and other environmental problems. Learn more about the history of Earth ... | <urn:uuid:04dab128-a84c-4997-839e-612cfb12c88c> | 2.84375 | 2,245 | Content Listing | Science & Tech. | 45.869315 |
Animals with backbonesPhilippe Janvier
This tree diagram shows the relationships between several groups of organisms.
The root of the current tree connects the organisms featured in this tree to their containing group and the rest of the Tree of Life. The basal branching point in the tree represents the ancestor of the... | <urn:uuid:92b70de3-0ff0-4f91-b075-5dd9e0c6db5b> | 3.546875 | 3,163 | Knowledge Article | Science & Tech. | 35.509897 |
very rare and local species in Belgium.
larva lives on Scutellaria
First mining, later in a loose spinning in a shoot or between two
leaves. It is not known how the winter is passed, but most probably in
the adult stage, because the usual food plant is often flooded during
winter and would not produce sufficient growth... | <urn:uuid:3d220581-6655-452f-aaa1-05e5ef4ebb84> | 2.71875 | 226 | Knowledge Article | Science & Tech. | 45.172113 |
Science Fair Project Encyclopedia
All trematodes are parasitic flatworms. Previous classification systems included the Monogenea amongst the trematoda, alongside the Digenea and Aspidogastrea, on the basis that they were all vermiform parasites. The taxonomy of the Platyhelminthes is being subjected to extensive revisi... | <urn:uuid:7317591d-c4a7-4e75-8e22-32d98335df87> | 3.453125 | 468 | Knowledge Article | Science & Tech. | 28.924575 |
London, England (CNN) -- A possible rise in sea levels by 0.5 meters by 2050 could put at risk more than $28 trillion worth of assets in the world's largest coastal cities, according to a report compiled for the insurance industry.
The value of infrastructure exposed in so-called "port mega-cities," urban conurbations ... | <urn:uuid:2dda96f2-f6df-47b2-9959-2b4ea344ff7b> | 3.09375 | 445 | Truncated | Science & Tech. | 39.675343 |
pg_trace() enables tracing of the PostgreSQL frontend/backend communication to a debugging file specified as pathname. To fully understand the results, one needs to be familiar with the internals of PostgreSQL communication protocol. For those who are not, it can still be useful for tracing errors in queries sent to th... | <urn:uuid:13aaaf7d-b586-495e-ad76-c15ccef3a136> | 2.78125 | 157 | Documentation | Software Dev. | 42.033475 |
AS A media strategy, inviting a crowd of hacks to play with rubbery pink goop is certainly novel. After 10 minutes getting our hands dirty, we're beginning to feel convinced. It seems any fool can fix a broken shuttle with this stuff. Which is just what's intended, because NASA has organised this workshop to showcase i... | <urn:uuid:34ce521f-99a9-4707-99b8-e36f67c691fc> | 3.015625 | 214 | Truncated | Science & Tech. | 55.618462 |
Wed Aug 27 01:52:45 BST 2008 by Dennis Bohner
Yes, Cape Canaveral
Wed Aug 27 05:45:14 BST 2008 by Paul M. Parks
It's Cape Canveral, though the space center is known as Kennedy Space Center.
Wed Aug 27 07:26:32 BST 2008 by Pierre Charland
So GLAST became Fermi,
like SIRTF became Spitzer,
like AXAF became Chandra,
like F... | <urn:uuid:687d2434-8efb-41ea-b8dd-67f849ce04ac> | 2.828125 | 466 | Comment Section | Science & Tech. | 77.874857 |
Chemistry assistant professor Paul Adams, seen here with students, uses the 3-D visualization developed by chemistry professor James Hinton at the University of Arkansas with the company Virtalis.
Credit: University of Arkansas
When data becomes too complex to describe or even imagine, researchers can bounce them off a... | <urn:uuid:6726af50-4244-4341-8ed2-867273a9cfc0> | 3.3125 | 1,835 | Content Listing | Science & Tech. | 36.53575 |
You most likely haven't noticed, but there is slightly more carbon dioxide in the atmosphere today than there was when you took your first breath the day you were born.
In the last 200 years, the volume of carbon dioxide in the Earth's atmosphere has increased by roughly 30 percent. This increase—mostly the result of u... | <urn:uuid:87c0fd24-2c70-467e-adc4-28f7fc1a325d> | 4.21875 | 697 | Knowledge Article | Science & Tech. | 23.46302 |
Brilliant 10: Anže Slosar Maps Matter At The Edge Of The Universe
IMAGE BY Marius Bugge
The oldest part of the universe, more than 10 billion light years away, bursts with super-luminous quasars and diffuse aggregations of hydrogen gas. Anže Slosar, a cosmologist at Brookhaven National Laboratory in New York, wants to ... | <urn:uuid:98adada4-023e-4364-9647-35fe7b5c5adf> | 3.34375 | 373 | Truncated | Science & Tech. | 42.012 |
Acta Biológica Colombiana
versión impresa ISSN 0120-548X
In 2000 the first draft of the human genome, what became known as our book of life, was presented. It generated high expectations for its potential applications to the benefit of the biological sciences. What happened 10 years later? We know how many genes we hav... | <urn:uuid:79c88358-569e-4e54-a890-78805016d4e1> | 3.296875 | 269 | Academic Writing | Science & Tech. | 25.126272 |