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Photoelectric Effect and Non-metals
I know what the photoelectric effect is, but everything I have
read only talks about metals. Can the photoelectric effect occur on other
substances, such as water?
Non metals are not likely to exhibit any photoelectric effect, because only metals have 'spare' electrons available in t... | <urn:uuid:3709c4c1-6b0d-4b73-9ed4-2da6a854d9b4> | 3.34375 | 445 | Q&A Forum | Science & Tech. | 42.46504 |
More blades give you more cost, but very little increase in efficiency.
Three blades turns out to be the optimum.
With four or more blades, costs are higher, with insufficient extra efficiency to compensate. Edit: prompted by a comment, here's some elucidation - this is more expensive per unit electricity generated, if... | <urn:uuid:4b869797-9475-4257-a58d-02a786bbb14d> | 2.78125 | 284 | Q&A Forum | Science & Tech. | 44.250838 |
Individual differences |
Methods | Statistics | Clinical | Educational | Industrial | Professional items | World psychology |
Antipredator adaptations are adaptations developed over evolutionary time, which assist prey organisms in their constant struggle against their predators. There are several ways antipredator ada... | <urn:uuid:384112ac-b144-4e67-a2a6-056d63f3fb80> | 3.453125 | 678 | Knowledge Article | Science & Tech. | 32.623537 |
The Warming of Greenland
By JOHN COLLINS RUDOLF
Published: January 16, 2007
Flying over snow-capped peaks and into a thick fog, the helicopter set down on a barren strip of rocks between two glaciers. A dozen bags of supplies, a rifle and a can of cooking gas were tossed out onto the cold ground. Then, with engines whi... | <urn:uuid:c6060389-316d-455c-8c56-846bc98d3f68> | 3.078125 | 1,163 | Truncated | Science & Tech. | 53.941876 |
Jan. 15, 2009
A team of NASA and university scientists has discovered substantial plumes of methane floating through the atmosphere of Mars. The find indicates Mars is either biologically or geologically active.
Jan. 14, 2009
NASA's next great Moon rocket promises to do more than land Astronautson the Moon. In its spar... | <urn:uuid:f59e7ddc-9f52-4715-82eb-3f6aa017cf06> | 2.734375 | 179 | Content Listing | Science & Tech. | 68.910651 |
While we are working on losing weight, exploring a new hobby, adding on that addition to the house or preparing for the future, scientists are also actively exploring the future of medicine: Nanotechnology. While exhaustively exploring nanotechnology would take an entire newspaper to cover, I’d like to cover a brief po... | <urn:uuid:138dde82-0382-47e0-a9ff-612e28199eef> | 3.046875 | 636 | Nonfiction Writing | Science & Tech. | 35.70013 |
this packing using fractal geometry. If you imagine the environment’s resources as a fractal, rather than a stick, small species will see that fractal at a higher magnification than large ones. Small species will see, and exploit, all the twists, turns, and branches in resource space invisible to larger species. Large ... | <urn:uuid:bddebe2e-cb8a-4cc0-b2e6-3c078cb5b2c9> | 3.921875 | 517 | Academic Writing | Science & Tech. | 49.052469 |
range emerges as the best predictor of survivorship in marine bivalves, and argue that such indirect effects are probably more important than generally appreciated. I will also discuss regional variations in the balance of invasions and local origination in the aftermath of the K-T event, which are somewhat unexpected ... | <urn:uuid:9ff375f7-1732-46f9-bb5d-cf1743098438> | 3.265625 | 606 | Academic Writing | Science & Tech. | 24.38931 |
in 1969, astronomers discovered that three of the giant planets, Jupiter,
Saturn, and Neptune, each radiate about twice as much energy as they receive
from the Sun. Those planets each contain a powerful energy source which was
inexplicable until J. Marvin Herndon, pictured at left, demonstrated in 1992 the
feasibility ... | <urn:uuid:9f4720d1-d0ea-43fb-9a93-d329075e21a3> | 3.9375 | 3,683 | Knowledge Article | Science & Tech. | 44.130296 |
Entamoeba is a genus of Amoebozoa found as internal parasites or commensals of animals. Several species are found in humans. Entamoeba histolytica is the pathogen responsible for amoebiasis (which includes amoebic dysentery and amoebic liver abscesses), while others such as Entamoeba coli and E. dispar are harmless. Wi... | <urn:uuid:6ed0599c-cc91-4781-9784-f7cf2ad9d490> | 3.78125 | 445 | Knowledge Article | Science & Tech. | 25.862103 |
April 17, 2009
The pygmy seahorse (Hippocampus bargibanti) evolved its knobby body and rosy color to blend in with gorgonians (sea fans) of the genus Muricella, where the seahorse makes its home among the coral reefs of the Western Pacific. These fish are so tiny (only two centimeters in height) and so well camouflaged... | <urn:uuid:cdc52439-518d-4d21-8bbd-d5c6103aff12> | 2.765625 | 192 | Truncated | Science & Tech. | 36.104167 |
Web development is a broad term for any activity related to developing a web site for the World Wide Web or an intranet. This can include e-commerce business development, web design, web content development, client-side/server-side scripting, and web server configuration.
However, among web professionals, "web developm... | <urn:uuid:603db6a5-893e-4459-a7b4-4be4fecf17ec> | 2.765625 | 1,777 | Knowledge Article | Software Dev. | 28.894805 |
I am not a specialist in this topic (nuclear rocketry), but I am an older, well-experienced aerospace/mechanical engineer, and I am well-read about these things. I have no hard numbers here, but these concepts really do look feasible and fruitful for manned Mars missions (and more).
Using solid-core nuclear rockets as ... | <urn:uuid:22bfa88d-134b-4d35-b07c-78ec698834c9> | 2.84375 | 1,898 | Personal Blog | Science & Tech. | 37.75974 |
Search "Sun songs" on the Internet and you'll see numerous listings. From the Beatle's "Here Comes the Sun" to the Fifth Dimension's "Aquarius/Let the Sun Shine In," sunlight and warmth make for catchy lyrics. As the closest star to our planet and something critical for all life, the Sun resonates deeply with human emo... | <urn:uuid:b9f1289a-bab6-4204-afcd-e78ae8e8e448> | 2.765625 | 533 | Personal Blog | Science & Tech. | 45.67102 |
Yes, you read that right. It seems impossible unless you grew up in a very cold climate. The story of the theory of freezing is an example of science marching backwards, of a case when folklore was correct instead of establishment science.
The fact that hot water freezes faster than cold has been known for many centuri... | <urn:uuid:1761e0f6-95c3-4694-8816-187dc71040cb> | 3.765625 | 556 | Personal Blog | Science & Tech. | 43.436299 |
Geology and Geomorphology
The Spring River Basin (Figure Ge02) is located along the border between the Osage Plains and the Springfield Plateau (MDNR 1986).
The Osage Plains are a subdivision of the Central Lowland Physiographic Region and encompass the northwest portion of the Spring River Basin. This is an unglaciate... | <urn:uuid:e474fb17-2fd6-44cc-ab8e-d878c4b1a13b> | 4 | 1,207 | Knowledge Article | Science & Tech. | 53.093999 |
Read all about Pythagoras' mathematical discoveries in this article written for students.
This article for pupils and teachers looks at a number that even the great mathematician, Pythagoras, found terrifying.
If the yellow equilateral triangle is taken as the unit for area,
what size is the hole ?
An introduction to p... | <urn:uuid:ac47afc0-9c6f-4dff-b22e-7dd770cc73aa> | 3.703125 | 215 | Content Listing | Science & Tech. | 44.950778 |
Temporary files and filenames.
- TemporaryFile(mode='w+b', bufsize=-1, suffix='')
- Create and return a temporary file (opened read-write by default).
- Function to calculate the directory to use.
- Function to calculate a prefix of the filename to use.
- User-callable function to return a unique temporary file name.
|... | <urn:uuid:4aeae4cb-97db-4adb-93c0-e352dfb8ce8a> | 3.203125 | 132 | Documentation | Software Dev. | 30.628636 |
This picture is of the Alpha-Monocerotid meteor outburst in 1995. The Perseid meteor shower, usually the best meteor shower of the year, peaks in August. Over the course of an hour, a person watching a clear sky from a dark location might see as many as 100 meteors. Meteors are actually pieces of rock that have broken ... | <urn:uuid:bf2c3808-2b65-4d84-a26d-b62a5e6b52cb> | 3.6875 | 129 | Truncated | Science & Tech. | 67.823162 |
Among the exciting preliminary discoveries made by our team of RAP scientists on the eastern edge of the Eastern Kanuku Mountains along the Kwitaro River:
- 198 species of plants (57 families)
- 73 species of large to medium fish
- 193 bird species
- 31 bats species
- 4 rodent species
- 3 opossum species
|The round-ear... | <urn:uuid:63a857f0-cded-4a20-ae12-0260beff0bfb> | 3.515625 | 496 | Knowledge Article | Science & Tech. | 45.369706 |
Activities Assessments Glaciers changes
Financially supported by UNEP and with the help of DEWA/GRID-Europe, the World Glacier Monitoring Service (WGMS) launched with UNEP a new publicaton on Glacier changes.
During the 20th anniversary celebrations of the Intergovernmental Panel on Climate Change (IPCC), in September ... | <urn:uuid:d8bc1942-12c8-4818-9413-398e534a2db2> | 2.875 | 535 | Knowledge Article | Science & Tech. | 31.695711 |
Spaceflight is inherently risky, and success is never assured. Case in point: on Tuesday an unmanned Russian cargo spacecraft failed in its attempt to dock with the International Space Station, the Associated Press reported. The craft was expected to try again on Sunday, after engineers try to figure out what went wron... | <urn:uuid:6573439b-774b-42a9-b43a-a8fc3635d218> | 3.015625 | 1,282 | Listicle | Science & Tech. | 49.673097 |
Lectures / 16/09/2009 7:30 pmOpen Space?
Is the Sun a Source of Danger? The sun and space weather as factors in climate change.
The sun is the star that is closest to earth. Even the most ancient civilizations were in no doubt as to how important the Sun is for life on earth. Yet the sun is by no means immune to change... | <urn:uuid:810c7e89-5cc6-4216-9805-c9cd3773f9c3> | 3.3125 | 349 | Content Listing | Science & Tech. | 45.83946 |
1. In Ancient Greece a man named Democritus figured out that every single thing in the universe must be made up of tiny particles that can’t be cut anymore. He called these particles “atoms”, which in Greek means “uncuttable”.
2. An atom is the smallest particle of an element still having the same chemical properties o... | <urn:uuid:e6ae78f3-a60d-4714-91ad-fe11432255f4> | 3.765625 | 258 | Listicle | Science & Tech. | 60.418638 |
What makes High and Low pressure, and is one more common during particular seasons?
High pressure is created by sinking, downward-moving air, while low pressure is created by rising air. That can be the result of global weather patterns...or very localized ones. For example...sinking cold air can created local zones of... | <urn:uuid:2cfaf600-388c-4671-b287-a0f953bdddfd> | 3.25 | 118 | Knowledge Article | Science & Tech. | 60.466955 |
It’s not hard to notice when your co-worker is grouchy, your friend is exhausted, or your boss is overjoyed. Without recognizing it, we easily pick up on other people’s emotions by registering certain behavioral cues. In turn, we understand whether we need to back off, lend a helping hand, or, in the case of the boss, ... | <urn:uuid:44873754-961e-4c8b-9c40-d1d585c09b03> | 2.6875 | 128 | Truncated | Science & Tech. | 60.191765 |
The exploration of the Martian surface has begun. The first trip, a mere three metres, took 78 seconds.
Nearly two weeks after it bounced to a landing on the barren plain of Gusev Crater, NASA's Spirit rover is off on its search for signs of water - and life.
Cheers erupted and champagne flowed at mission control at th... | <urn:uuid:e6880e75-47da-4ff6-afcc-357b9d6e8eb9> | 3.03125 | 554 | Truncated | Science & Tech. | 48.309281 |
A picture-perfect pure-disk galaxy
Recent research suggests that bulge-less, or pure-disk, spiral galaxies like NGC 3621 are actually fairly common.
February 3, 2011
The bright galaxy NGC 3621, captured here using the Wide Field Imager on the 2.2-meter telescope at the European Southern Observatory’s (ESO) La Silla Obs... | <urn:uuid:cc9bce3d-4681-4365-aa7c-20d12ac6b79f> | 3.21875 | 669 | Knowledge Article | Science & Tech. | 39.864156 |
Climate Change Impacts
Our climate is changing. Sea level rose over 7 inches in the last 100 years along our coast. Ocean temperatures have warmed by 3 degrees F in parts of New England in the last 50 years while surface water salinity is becoming fresher.
“We know the planet is absorbing more energy than it is emittin... | <urn:uuid:ca655a26-0d52-4f69-a951-bd8930caf2b6> | 4.125 | 977 | Knowledge Article | Science & Tech. | 39.737288 |
Above is a MODIS visible satellite image, from the polar orbiting satellite “Aqua”, as it passed over the eastern Pacific ocean just off the coast of the Baja Peninsula of Mexico on April 28. On the upper left portion of the image is Guadalupe Island, which as of 2008 only had a population of 15! On this particular day... | <urn:uuid:5944b996-861e-4439-a9ab-bdac28bdd6e4> | 3.90625 | 268 | Knowledge Article | Science & Tech. | 37.946741 |
Because the atmosphere is so thick on Venus, however, it's like as if Earth had no continents with a swift equatorial ocean current. So, I can see how the effect on Venus' rotation would be significant. Once the air currents got rolling, they would take on a life of their own (just like bathtubs that drain in a clockwi... | <urn:uuid:9b30dc6b-80d7-4d08-b02a-c3306364398e> | 2.96875 | 166 | Comment Section | Science & Tech. | 41.998922 |
Common dolphins are fond of coastal waters, but are also found well out to sea. Generally, they prefer surface temperatures greater than 10 degrees Celsius. These dolphins normally travel at 5 to 7 miles per hour (although they are known to reach speeds of 29 miles per hour when pursuing food), and can move up to 150 t... | <urn:uuid:e21c8947-c4d1-4128-b76f-b0fcdd121e5c> | 3.1875 | 150 | Knowledge Article | Science & Tech. | 65.793175 |
Radiation Assessment Detector (RAD)
Radiation Assessment Detector
About the size of a small toaster, the Radiation Assessment Detector will look skyward and use a stack of silicon detectors and a crystal of cesium iodide to measure galactic cosmic rays and solar particles that pass through the Martian atmosphere. Image... | <urn:uuid:7b4b2023-c613-416e-bef2-ef134c413941> | 3.796875 | 512 | Knowledge Article | Science & Tech. | 21.014969 |
4.4. Individual and Orbital Masses of Double Galaxies
A remarkable observational discovery in the dynamics of galaxies in recent years has been the identification of non-Keplerian rotation in the peripheral regions of many galaxies (Shostak and Rogstead, 1973). The prevalence of such flat rotation curves was convincing... | <urn:uuid:b271f137-5394-4899-9ddb-f585e39ed0d8> | 2.90625 | 2,941 | Academic Writing | Science & Tech. | 50.137155 |
sigwait - wait for queued signals
The sigwait() function shall select a pending signal from set, atomically clear it from the system's set of pending signals, and return that signal number in the location referenced by sig. If prior to the call to sigwait() there are multiple pending instances of a single signal number... | <urn:uuid:d0491894-6e3c-48ef-a9b0-d3ecab0584a6> | 2.71875 | 802 | Documentation | Software Dev. | 46.982192 |
Are there any reasons I shouldn't do this?
Yes, there is a reason why you shouldn't do this.
Referencing a member variable with
this-> is strictly required only when a name has been hidden, such as with:
void bang(int val);
void Foo::bang(int val)
val = val;
foo.val = 42;
cout << foo.val;
The output of this program is
... | <urn:uuid:d47198c4-c082-48a5-b3b2-b2b2e55d1c88> | 2.6875 | 657 | Q&A Forum | Software Dev. | 67.932941 |
- Author: Kathy Keatley Garvey
If that word is not in your everyday vocabulary, just think of a symbiotic relationship where one organism transports another organism of a different species for the benefit of both.
And there you have it--at least part of it--of what evolutionary ecologist Leslie Saul-Gershenz of the Uni... | <urn:uuid:755c5d7f-2700-4be8-ac1c-5fa0f848d76b> | 3.125 | 602 | Knowledge Article | Science & Tech. | 36.335569 |
Today I’ll give another great way to get rings: from semigroups.
Start with a semigroup . If it helps, think of a finite semigroup or a finitely-generated one, but this construction doesn’t much care. Now take one copy of the integers for each element of and direct sum them all together. There are two ways to think of ... | <urn:uuid:dec0fca6-e85d-49f5-8126-cce9d907c64b> | 3.15625 | 584 | Personal Blog | Science & Tech. | 55.571841 |
|The prominent ridge of emission featured in
this vivid skyscape
is designated IC 5067.
Part of a larger
nebula with a distinctive shape, popularly called
The Pelican Nebula, the ridge spans about
10 light-years and follows the
curve of the cosmic pelican's head and neck.
The Pelican Nebula close-up was constructed fro... | <urn:uuid:e6c2ff23-0862-42dc-ae5c-1d7e90aa4a6d> | 3.21875 | 235 | Knowledge Article | Science & Tech. | 47.20121 |
If every piece of code worked perfectly the first time, programming would be an easy job. Sadly, that is not the case. In any large project, you will probably spend more time testing, tracking down bugs, and figuring out how to fix them than you spend writing the code in the first place.
Dealing with bugs is an unavoid... | <urn:uuid:1cb9b3f4-54d4-40ea-82b9-ec5784b89fc1> | 2.71875 | 359 | Personal Blog | Software Dev. | 40.757084 |
Cave-riddled hills jut steeply from the flat pine savanna of Runaway Creek Nature Reserve in Belize. Tapirs, jaguars and wild pigs call the forest-blanketed hillsides home. The territory also encompasses the range of a group of spider monkeys whose lives University of Calgary anthropologist Mary Pavelka and graduate st... | <urn:uuid:ed067262-f254-48d1-80b4-c87db434be19> | 3.71875 | 389 | Truncated | Science & Tech. | 33.067011 |
Late in the afternoon last Friday (one week ago), scattered thunderstorms developed west and north of Washington and moved north-northeast. By 6:00pm, a line of thunderstorms developed to the southwest of Washington and began racing northeastward at over 40 mph. One of the storms near Stafford was severe and a funnel c... | <urn:uuid:73ac0676-14fb-4c29-900c-4c076b019a62> | 2.9375 | 348 | Personal Blog | Science & Tech. | 56.854665 |
Software Design Using C++
What is a Queue?
A queue is a "waiting line" type of data structure. Much like with a stack,
you can insert items into a queue and remove items from a queue. However,
a queue has "first come, first served" behavior in that the first item
inserted into the queue is the first one removed. This i... | <urn:uuid:1bf68317-c1d1-404d-b03e-c75db502c546> | 4.09375 | 1,169 | Documentation | Software Dev. | 65.488537 |
Three top climate researchers claim that the greenhouse gases already in the atmosphere should have warmed the world more than they have. The reason they have not, they say, is that the warming is being masked by sun-blocking smoke, dust and other polluting particles put into the air by human activity.
But they warn th... | <urn:uuid:43474e9f-ff53-4db2-a09e-1a882d12e830> | 2.8125 | 342 | Personal Blog | Science & Tech. | 52.928786 |
Phylogenetics became a science with a consistent and objective methodology after the introduction of phylogenetic systematics, or cladistics, by Willi Hennig in the 1950s and 1960s (1, 2). As a life-long student of ichthyology and a scientist who specializes in phylogenetic methods, I have been interested in hypotheses... | <urn:uuid:da9c885a-f702-4e45-a764-9acb0b210c87> | 2.90625 | 1,087 | Personal Blog | Science & Tech. | 47.737997 |
- Queensland Maths
- File Types
Students will approximate the area under a curve using Riemann sums. This will be done by utilizing a program that computes the Riemann sum as well as drawing the graphical representation. The activity concludes with students discovering that if enough Riemann sums are used, then the are... | <urn:uuid:03f0bd32-96e8-4e40-88ad-76a5c30513e6> | 3.625 | 267 | Content Listing | Science & Tech. | 43.138 |
The work of Oliver Heaviside and Laplace put the electrical theories in a firm footing.
Heaviside invented an operational calculus for solving differential equations arising out of electrical network analysis, which was justified rigorously later by Laplace Transforms(but which makes full sense only incorporating the t... | <urn:uuid:8eee1c5c-b58a-45cb-8b06-83d2ed710e74> | 2.890625 | 130 | Knowledge Article | Science & Tech. | 20.657925 |
Adults are slender, soft-bodied, with four membranous, extensively veined wings held upright and together (like a butterfly). The forewings are much longer and often overlap the hindwings. When perching, the front pair of legs are often held outward. They have short antennae and large compound eyes. There are 2 long, t... | <urn:uuid:a7dd980e-8042-4356-9a1a-936211d9a987> | 3.4375 | 165 | Knowledge Article | Science & Tech. | 47.395126 |
Scanning Probe Microscope Piezoelectric Crystals
In this resource we disassemble the piezoelectric assembly of a scanning probe microscope. At its core is a white cylinder of the piezoelectric material. If you look closely, it has a granular texture that reflects the fact that it is actually made up of many small cryst... | <urn:uuid:9732f1b3-79f6-45fb-a1bc-479dba080b22> | 2.8125 | 129 | Knowledge Article | Science & Tech. | 39.599167 |
Dan Brown in his book, The Da Vinci Code, talks about the "divine proportion" as having a "fundamental role in nature". Brown's ideas are not completely without foundation, as the proportion crops up in the mathematics used to describe the formation of natural structures like snail's shells and plants, and even in Alan... | <urn:uuid:608a6b00-4ace-41ee-be82-056fc2c2b1ad> | 2.828125 | 309 | Truncated | Science & Tech. | 53.808079 |
CaryophylliinaStephen D. Cairns
The caryophylliines are known from the early Jurassic (180 million years ago) to the Recent, and occur in most marine environments to a depth of 3200 m. They are an extremely diverse group, consisting of 91 living genera and 457 living species (Cairns et al., 1999). Although some species... | <urn:uuid:eda83abb-afad-4098-940e-2be97da7af77> | 3.59375 | 1,447 | Knowledge Article | Science & Tech. | 43.268442 |
am trying to store an object using a key
in a Hashtable. And some other object
already exists in that location, then
what will happen? The existing object
will be overwritten? Or the new object
will be stored elsewhere?
existing object will be overwritten and
thus it will be lost.
An enumeration is an interface contain... | <urn:uuid:8793cf0a-0b5c-4093-a5d0-95eb6c9e85f5> | 2.984375 | 238 | Q&A Forum | Software Dev. | 38.86 |
Trying to create visual representations of what our climate futures might look like is always a taxing and delicate task. Computer-generated images of our familiar coastal cities inundated with sea water certainly attract attention, but they also – quite rightly, perhaps – get slammed for being "alarmist", especially i... | <urn:uuid:7e696a43-abb6-4ea2-be8b-5602181b923d> | 3.765625 | 188 | Personal Blog | Science & Tech. | 30.424292 |
Add your answer here.
Check out some similar questions!
Physics Question on Newton's Laws and the Equations of Motion [ 6 Answers ]
A train is travelling up a 3.73 degree incline at a speed of 3.25 metres per second, when the last cart breaks free and begins to coast without friction. (i) How long does it take for the ... | <urn:uuid:0a4e55a7-b962-45f8-8b2b-a2e49061d299> | 3.015625 | 420 | Q&A Forum | Science & Tech. | 75.892905 |
The original experimental scheme required the electrical field to
be planar to within 10
nanoradians to achieve the goal sensitivity of 10-24 e-cm.
Newer schemes, using, for example, a central electric field structure with
the beam circulating in both directions, relax the planarity requirement appreciably. However, it... | <urn:uuid:604b0519-8f83-49d0-aee8-cc5d0cd18590> | 3.0625 | 292 | Knowledge Article | Science & Tech. | 28.764091 |
Lower Continental Crust
Re–Os isotope evidence for the composition, formation and age of the lower continental crust
Knowledge of the composition of the lower continental crust is important not only for understanding the formation and evolution of the crust as a whole, but also to evaluate the petrogenesis of continent... | <urn:uuid:3b184047-ffe2-4e22-ac25-720f79aef2f6> | 2.8125 | 342 | Academic Writing | Science & Tech. | 37.636846 |
Disturbing the Nanosphere
Cornell University researchers deliberately created atomic-level disorder in order to probe the workings of heavy fermion compounds. In an interview, Mohammad Hamidian discusses how this work, and a new tool created at Cornell, may be just the thing for revolutionizing 21st century technology.... | <urn:uuid:3a1bcd89-3d5f-45cc-b0eb-2b27e3d616a1> | 3.21875 | 1,940 | Audio Transcript | Science & Tech. | 32.376537 |
This section describes some of the basic ways in which you can use the Class Browser by giving some examples. If you wish, you can skip this section and look at the descriptions of each individual view: these start with Examining slot information.
When examining a class, the slot names of the class are displayed by def... | <urn:uuid:c8e916a8-17da-4ad9-9e96-a45be596b437> | 3.046875 | 249 | Documentation | Software Dev. | 52.020333 |
THE human brain is wonderful at spotting patterns. It's an ability that is one of the foundation stones of science. When we notice a pattern, we try to pin it down mathematically, and then use the maths to help us understand the world around us. And if we can't spot a pattern, we don't put its absence down to ignorance... | <urn:uuid:e27e14bf-605b-4dea-a02c-c04124fb0c11> | 2.984375 | 209 | Truncated | Science & Tech. | 63.72487 |
The PHP Freaks website has a new tutorial posted today thats an introduction to design patterns - what they are and which were the ideas of the "Gang of Four".
Implementing Design Patterns is gradually getting more common in the PHP world. The hype around Ruby on Rails, which is based on the Model-View-Controller archi... | <urn:uuid:80e58324-4991-4fba-b1b9-4ea4a016704b> | 2.6875 | 170 | Personal Blog | Software Dev. | 34.8405 |
|Dec1-12, 01:03 PM||#1|
How do thermocouples work?
Hello there! I am planning to do an experiment on thermocouples but have a few questions.
1. What is the physics behind why the thermocouple works?
2. Why do two different metals need to be used for making this?
|Dec1-12, 01:23 PM||#2|
Do you understand what a Fermi su... | <urn:uuid:aa9c5f34-5c57-454e-a86d-ca97aee55c04> | 2.859375 | 454 | Comment Section | Science & Tech. | 54.601843 |
The Allen Telescope Array (ATA) is a "Large Number of Small Dishes" (LNSD) array designed to be highly effective for “commensal” (simultaneous) surveys of conventional radio astronomy projects and SETI (search for extraterrestrial intelligence) observations at centimeter wavelengths.
The idea for the ATA emerged in a s... | <urn:uuid:b6b49a05-8da0-4c41-b737-779b9ae6de52> | 3.46875 | 253 | Knowledge Article | Science & Tech. | 24.918105 |
Section: String and data retrieving fun (3stap)
Updated: March 2013
Return to Main Contents
function::kernel_pointer - Retrieves a pointer value stored in kernel memory
The kernel address to retrieve the pointer from
Returns the pointer value from a given kernel memory address. Reports an error when reading from the gi... | <urn:uuid:24150854-f25b-4a65-ab60-2c3857f0e3fc> | 3.390625 | 97 | Documentation | Software Dev. | 52.298696 |
Geometric Structures: Session I
Pleasing Shapes, Careful Looking, Same-Different, and the Power of Words
Department of Mathematics
York College (CUNY)
Jamaica, New York 11451
Our daily lives are enriched by pleasing shapes:
Some shapes are pleasing because they are so symmetrical and other shapes are pleasing because t... | <urn:uuid:c6aef05f-abfb-4b20-ad98-aa4338bcb3ab> | 3.875 | 2,598 | Academic Writing | Science & Tech. | 57.512437 |
A base is a molecule which produces hydroxide ions when added to water (according to the Arrhenius definition), which accepts H+ ions in a chemical reaction (according to the Bronsted-Lowry definition), or which donates an electron pair in a reaction (according to the Lewis definition). Bases have a bitter taste and tu... | <urn:uuid:e530b55f-a2e7-47eb-bb5d-ec33cf07da86> | 3.640625 | 118 | Knowledge Article | Science & Tech. | 41.474088 |
A real number is called normal if you can "find" all (finite) digit sequences in its expansion. There are several variant definitions in use, and often it's important to determine which is relevant.
First, there's the question of how often each sequence must occur.
- Easiest is the demand that the digit sequence just o... | <urn:uuid:a594a1c2-237e-4ca1-9401-06f4598eb074> | 3.25 | 376 | Knowledge Article | Science & Tech. | 42.668953 |
OpenGL accelerated video renderer
One of the most important components of a video player or a multimedia framework is the video renderer. The quality and performance of the playback greatly depends on it. Despite this, many video players still use obsolete techniques, which cannot fully take advantage of the enormous p... | <urn:uuid:d325c61f-624c-4bb1-ae25-65cbc69d0a64> | 2.71875 | 241 | Knowledge Article | Software Dev. | 20.403992 |
Java is considered very safe programming language compared to C and C++ as it doesn't have free() and malloc() to directly do memory allocation and deallocation, You don't need to worry of array overrun in Java as they are bounded and there is pointer arithmetic in Java. Still there are some sharp edges in Java program... | <urn:uuid:2746ee19-3da2-4e92-815c-8f1e9bbf0cb4> | 3.3125 | 664 | Personal Blog | Software Dev. | 34.912902 |
There are many reasons for the loss of biodiversity around our planet. These serious issues affect both plants and animals. Did you know that throughout history the earth has gone through several periods called mass extinctions. In the past, these have been
occurred due to natural causes such as volcanoes and natural c... | <urn:uuid:8573b067-c673-4c92-801f-cb849059c165> | 3.484375 | 124 | Knowledge Article | Science & Tech. | 38.808801 |
Using the DockPanel layout panel
A DockPanel layout panel in a Windows Presentation Foundation (WPF) project provides a layout area within which you can arrange child objects around the edge of the screen based on compass direction: North, South, East, and West. The DockPanel was historically used for root layout in ot... | <urn:uuid:740beeae-a617-484a-b72d-9891dd4c9a41> | 2.796875 | 354 | Documentation | Software Dev. | 49.030689 |
John Dabiri, bioengineer at Caltech, has developed new techniques for studying the motion of aquatic animals. In a recent study in the journal Nature
, Dabiri and colleagues explain how swimming animals mix the ocean. Ocean mixing is important for the distribution of gases and nutrients throughout the sea, and can even... | <urn:uuid:ea401c8a-3864-4ede-8ad4-134f49353d7c> | 3.1875 | 111 | Truncated | Science & Tech. | 42.243291 |
The Higgs Mechanism part 4: Symmetry Breaking
At last we’re ready to explain the Higgs mechanism. We start where we left off last time: a complex scalar field with a gauged phase symmetry that brings in a (massless) gauge field . The difference is that now we add a new self-interaction term to the Lagrangian:
where is ... | <urn:uuid:8ccd573f-fb45-44b7-b005-a4db3fff5fe4> | 2.71875 | 927 | Personal Blog | Science & Tech. | 44.29404 |
Learn more physics!
OK you can make some thing float with helium ok i have a rocket i need to float how much helium will it take to float an object say per gm?
the baloon has a volume of 28295.8367 cm^3 how much will it float?
- Ellison (age 16)
According to the paragraph on helium in my CRC Handbook of Chemistry
and P... | <urn:uuid:435553a4-3e0e-4908-9298-761025872102> | 2.8125 | 177 | Q&A Forum | Science & Tech. | 80.959167 |
Sunglint and Clouds off Western South America
Astronaut photograph ISS031-E-35310 was acquired on May 15, 2012, with a Nikon D2Xs digital camera using a 180 mm lens, and is provided by the ISS Crew Earth Observations experiment and Image Science & Analysis Laboratory, Johnson Space Center. The image was taken by the Ex... | <urn:uuid:c6cac533-d3b2-457c-8e67-9101e7debb08> | 3.328125 | 428 | Knowledge Article | Science & Tech. | 46.009609 |
Physics and Feynman's Diagrams
In the hands of a postwar generation, a tool intended to lead quantum electrodynamics out of a decades-long morass helped transform physics
As theoretical physics blossomed during the 1930s and 1940s, so did the problem of infinities: The equations physicists constructed to answer fundame... | <urn:uuid:8e939665-87cd-4cce-9e82-a8fc07824af3> | 3.5 | 198 | Truncated | Science & Tech. | 22.86504 |
magnetic mirrorArticle Free Pass
magnetic mirror, static magnetic field that, within a localized region, has a shape such that approaching charged particles are repelled back along their path of approach.
A magnetic field is usually described as a distribution of nearly parallel nonintersecting field lines. The directi... | <urn:uuid:3e393b77-4b22-4e18-906d-40376fbf5edd> | 4.125 | 229 | Knowledge Article | Science & Tech. | 39.460625 |
Found 0 - 10 results of 20 programs matching keyword "black sand"
For thousands of years, Indian women have created these elaborate geometric designs using a variety of natural materials—flowers, spices, sand, and natural pigment—to mark auspicious occasions, celebrations, and milestones. The Nautilus has discovered se... | <urn:uuid:37afba40-727c-4f66-84f6-edafc8d0f14a> | 2.78125 | 523 | Content Listing | Science & Tech. | 46.825804 |
There are now a greater number of global coupled atmosphere-ocean models and
a number of them have been run for multi-century time-scales. This has substantially
improved the basis for estimating long time-scale natural unforced variability.
There are still severe limitations in the ability of such models to represent
... | <urn:uuid:39a1b5f2-18ac-451d-959c-dd2ab94516aa> | 2.734375 | 640 | Academic Writing | Science & Tech. | 29.171289 |
The COSIMA (Cometary Secondary Ion Mass Spectrometer) on board the Rosetta spacecraft will chemically and isotopically analyze the dust particles that are captured in the coma of comet Wirtanen. The experiment works with secondary ion mass spectroscopy (SIMS). A high energy primary ion beam, COSIMA uses 115In+ at 10 ke... | <urn:uuid:24478106-79ac-4b79-a1d5-66253f573aa7> | 3.328125 | 263 | Knowledge Article | Science & Tech. | 33.68873 |
4.2 The Tracer
traceon one or more functions. Tracing information is normally printed whenever the traced function is entered or exited. Tracing information consists of the name of the function followed at entry by its arguments and on exit by its return values. For example, the following code traces a call to the func... | <urn:uuid:5f81f1dc-e46b-4a6a-bb01-a8c77baa9870> | 2.8125 | 249 | Documentation | Software Dev. | 55.441496 |
Searches for the named texture. If the current search mode is rwLOCAL, the function searches only the current dictionary. If the current search mode is rwGLOBAL, the function searches the whole of the texture dictionary stack. If the search fails, an attempt is made to read the named texture from disk. If the named tex... | <urn:uuid:30ce79b6-e813-41db-9e72-a72a69794c67> | 2.765625 | 316 | Documentation | Software Dev. | 57.216458 |
Today, we fly to the North Pole. The University of Houston's College of Engineering
presents this series about the machines that make our civilization
run, and the people whose ingenuity created them.
So, who first reached the North Pole? Getting
there lay on people's minds for centuries. Thomas Jefferson suggested
goi... | <urn:uuid:3b6c46c9-a379-4179-bfe5-19584b3a351b> | 4.21875 | 939 | Audio Transcript | Science & Tech. | 64.35376 |
Imagine, we need to read and eval code from some untrusted source. This code may change lisp environment in uncertain way as expected behaviour, but it may also contain error, which stops execution in the middle. This is not what we want: environment should be changed completely or rolled back to previous state.
Naive ... | <urn:uuid:fee4f3af-a8ed-4555-9910-b29f290c42ab> | 2.90625 | 579 | Personal Blog | Software Dev. | 47.526971 |
August 30th, 2011
MODIS true color Red/Green/Blue (RGB) images
A sequence of daily 250-meter resolution MODIS true color Red/Green/Blue (RGB) images from the SSEC MODIS Direct Broadcast site (above) showed the development and evolution of the smoke plume emanating from a swamp fire that was burning in the Bayou Sauvage... | <urn:uuid:64c674a6-8bdb-4727-9f30-c18b99bbc2ef> | 2.765625 | 876 | Content Listing | Science & Tech. | 48.00484 |
Typically in Erlang you write ..
(fun(X) -> X * 2 end)(6)
to get 12 as the result. With string lambda, you write ..
(utils:lambda("X * 2"))(6)
to get the same result. Ok, counting the characters of the module and the function, you grin at the fact that it is really more verbose than the original one. But we have less b... | <urn:uuid:d3144993-0e2f-46bc-995c-d9921d1b2bb2> | 3.015625 | 1,039 | Personal Blog | Software Dev. | 64.214619 |
Do animals as simple as flies have personalities?
Definitions of personality vary substantially across fields, and are often left implied. The heart of the phenomenon seems to be that individual organisms display idiosyncratic behavioral patterns that persist for a substantial amounts of time. By this definition, flies... | <urn:uuid:8f9671c3-82f3-4db1-a58a-dd8b177a9dc2> | 3.28125 | 1,028 | Personal Blog | Science & Tech. | 24.252282 |
The physics is actually much easier than it seems at first glance.
Power generators are engines just like the everyday ones we see all around in our cars, lawnmowers, snowblowers, etc.
Except for new power sources like some wind and solar systems with electronic inverters, the vast majority of power is supplied by larg... | <urn:uuid:12856ec6-8baa-418d-b58e-e9b9ec343485> | 3.390625 | 493 | Q&A Forum | Science & Tech. | 37.898048 |
Text File Databases: Part 1
October 19, 2010
There is a lot of data stored in plain-ascii text files consisting of records separated by newlines, each record consisting of multiple fields, and it is useful to have a function library for dealing with them. This exercise looks at some functions for reading the data; the ... | <urn:uuid:88e37770-b49e-4bf6-9a0b-9798727b0e2d> | 2.875 | 586 | Tutorial | Software Dev. | 32.261407 |
A general property of magnetic fields is that they decay with the distance from their magnetic source. But in a new study, physicists have shown that surrounding a magnetic source with a magnetic shell can enhance the magnetic field as it moves away from the source, allowing magnetic energy to be transferred to a dista... | <urn:uuid:9c676403-b18f-4342-9372-55db40839a7c> | 3.4375 | 386 | Personal Blog | Science & Tech. | 34.627406 |
At some stage the land underneath West Cumbria will be used as a dump for spent nuclear material produced as a by product of nuclear electricity generating power stations.
West Cumbria, the geologists believe, was formed by rocks laid down at various times between 500 million years ago and 200 million years ago. Since ... | <urn:uuid:9246298c-8199-432a-af29-0392d29dfe8f> | 3.546875 | 685 | Personal Blog | Science & Tech. | 45.205441 |
What causes the sun to vary?
We live in the extended atmosphere of a magnetic variable star that drives our solar system and sustains life on Earth. Our Sun varies in every way we can observe it. The Sun gives off light in the infrared, visible, ultraviolet, and at x-ray energies, and it gives off magnetic field, bulk ... | <urn:uuid:f8e9d8ed-39d9-46a6-9a30-a680417d9ece> | 3.921875 | 526 | Content Listing | Science & Tech. | 50.615597 |
Learning Intention: Students will understand the properties of igneous, sedimentary and metamorphic rocks and how they are formed. They will relate chnages in landscape formations over time with processes such as weathering, erosion, fossilisation and movement of continental plates.
Success Criteria: At the completion ... | <urn:uuid:53772f54-2d92-4bc6-905a-9df74525f41e> | 4.46875 | 275 | Tutorial | Science & Tech. | 37.807942 |
Optical data analysis looks to clinical applications
Previous work under the direction of the Dr. Reijo Pera and Dr. Baer correlated dark-field time-lapse imaging with gene expression profiling to conclude that success of the embryo to develop into the blastocyst stage can be reliably predicted within two days of ferti... | <urn:uuid:904560a2-b981-468c-8f00-0716e786a562> | 3.171875 | 730 | Academic Writing | Science & Tech. | 37.382956 |
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Open Directory - Science: Physics: Optics: Color
Business: Chemicals: Dyes and Pigments: Pigments
Computers: Graphics: Web: Colors
Health: Conditions and Diseases: Eye Disorders: Color Blindness
Science: Physics: Education: Light and Optics
Science: Social Scie... | <urn:uuid:3400b213-66c4-4c52-bb2f-01133d2d1a61> | 3.125 | 517 | Content Listing | Science & Tech. | 24.879767 |
How far off are scientists from making a synthetic cell?
So far in synthetic biology, manipulations have been limited to designing different genetic circuits by reshuffling some of the natural genes to perform a particular task and moving metabolic pathways from one organism into another. For example, the Keasling grou... | <urn:uuid:5b0dc18c-1f16-49da-abec-9ee8649011a1> | 3.671875 | 477 | Q&A Forum | Science & Tech. | 28.795897 |
The Water Vapor map shows areas of moist and dry air at mid-levels of the atmosphere (about 12,000 feet). Water vapor or water vapour, also aqueous vapor, is the gas phase of water. Water vapor is one state of the water cycle within the hydrosphere. Water vapor can be produced from the evaporation of liquid water or fr... | <urn:uuid:537daef3-e5f2-474f-884c-6572b122c378> | 4.125 | 636 | Knowledge Article | Science & Tech. | 30.776304 |
The Doppler shift is a shift in the wavelength of light or sound that depends on the relative motion of the source and the observer. A familiar example of a Doppler shift is the apparent change in pitch of an ambulance siren as it passes a stationary observer. When the ambulance is moving toward the observer, the obser... | <urn:uuid:4d00b578-2e95-4d9f-be09-7bb51f5d3eff> | 4.40625 | 219 | Knowledge Article | Science & Tech. | 40.153125 |
Improving our understanding of the role of the oceans and the cryosphere (ice) in the climate system.
• Improving ocean and ice modelling capability.
• Providing advice to government regarding climate mitigation.
• Understanding how the oceans, sea-ice and land-ice could be affected by climate change and how these chan... | <urn:uuid:62363ae9-7353-4065-9254-855794fbf32e> | 3.140625 | 232 | Content Listing | Science & Tech. | 24.385086 |
A Comet Impacts Jupiter
Name: gwendolyn williams
Date: 1993 - 1999
Hello, I am gwendolyn williams and I teach high school physical
science last week a very significant event took place on the planet Jupiter.
When school opens in the fall, this event will be some what history, and I am
wondering, if there will be comput... | <urn:uuid:113d09b0-b135-456f-b021-f7f2e745a0d6> | 2.9375 | 308 | Q&A Forum | Science & Tech. | 46.1 |
Tetrachromacy is the ability to see color through four different “channels.” More specifically, an animal with tetrachromacy would have four different types of cone cells in each eye. A tetrachromate has a four dimensional color view, which just means that they see with four different primary colors as opposed to just ... | <urn:uuid:5bd26353-753e-4c28-95fe-05f356e58527> | 4.21875 | 263 | Knowledge Article | Science & Tech. | 39.639793 |