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Disabling a command marks the command as requiring user confirmation before it can be executed. Disabling is used for commands which might be confusing to beginning users, to prevent them from using the commands by accident.
The low-level mechanism for disabling a command is to put a
disabled property on the Lisp symbo... | <urn:uuid:4b16a22a-9f9a-43e3-9cf1-07dc729c46e8> | 2.734375 | 380 | Documentation | Software Dev. | 48.093274 |
DROP OPERATOR id ( lefttype | NONE , righttype | NONE )
The identifier of an existing operator.
The type of the operator's left argument; write NONE if the operator has no left argument.
The type of the operator's right argument; write NONE if the operator has no right argument.
The message returned if the command is s... | <urn:uuid:70b9f2b6-0add-47db-9b4e-ecfec4023943> | 3 | 301 | Documentation | Software Dev. | 31.675588 |
The Twilight Zone
Steve Nichols G0KYA
7, Quebec Close
Norwich NR4 6XU
Tel: 01603 503076
Intro: Steve Nichols G0KYA, of the RSGB’s Propagation Studies Committee, believes that propagation around sunrise and sunset is not fully understood. Here he outlines the mechanisms behind grey line and other twilight propagation mo... | <urn:uuid:85e4c0ef-9f05-4d1d-a9bf-913b973f11fc> | 3.453125 | 2,702 | Nonfiction Writing | Science & Tech. | 58.083889 |
An i-movie done by students for a science class. Video explains that nebulaes are clouds of dust and galaxy. Two different types; diffuse nebulae and planetary nebulae. Scientists now know something about their nature, size, and appearance. Video has great pictures and the narrators voice is very clear. Good video for ... | <urn:uuid:fd8fc1be-0a5d-40a2-b680-1078834e5667> | 3.296875 | 85 | Truncated | Science & Tech. | 44.860705 |
Dryococelus australis, commonly known as the Lord Howe Island stick insect or tree lobster, is a species of stick insect which lives on the Lord Howe Island Group. It was thought to be extinct by 1930, only to be rediscovered in 2001 (this phenomenon is known as the Lazarus effect). It is extinct in its largest habitat... | <urn:uuid:cf18e076-17a5-4e92-b747-05fe49c9ee73> | 3.3125 | 179 | Knowledge Article | Science & Tech. | 50.5025 |
Last week we drew dots at multiples of the vectors \(v=(\phi,\phi^2)\) and \(w=(\phi^2,\phi)\), and we colored grid-cells green or yellow according to whether they contain a dot or not. Our remaining task was to prove these three facts:
- Endgame condition: The cell (0,0) is green.
- Greens lose: From a green cell, the... | <urn:uuid:18745ce2-a602-42be-8325-cd0769c37f85> | 3.28125 | 748 | Personal Blog | Science & Tech. | 72.160207 |
The objective of this experiment is to determine the identity of a compound that boils at a low temperature. The compounds chosen as unknowns change from the liquid state to a gas at fairly low temperatures, so we can use a simple water bath to heat the sample in a gas density flask and apply the ideal gas law:
You wil... | <urn:uuid:c834ef08-39fa-42e1-b0cb-d2cc4d80ff4c> | 3.90625 | 167 | Academic Writing | Science & Tech. | 37.092979 |
The influence of riparian vegetation on the distribution and abundance of bats in an African savanna
Monadjem, Ara, and Reside, April (2008) The influence of riparian vegetation on the distribution and abundance of bats in an African savanna. Acta Chiropterologica, 10 (2). pp. 339-348.
|PDF (Published Version) - Reposi... | <urn:uuid:d01d9e0c-a4ab-435c-8530-4b8c81025e00> | 3.359375 | 554 | Academic Writing | Science & Tech. | 35.978493 |
New 'water world' planet GJ1214b discovered that could support new life
The new discovery is a super-Earth 2.7 times bigger than our planet, orbiting a red-dwarf star at a distance of two million kilometres.
It was initially observed in 2009, with astronomers believing that the gas around the planet may be a haze simil... | <urn:uuid:0a4e08eb-0ed5-4bd7-a00b-ed7deab3066e> | 3.328125 | 269 | Comment Section | Science & Tech. | 39.746037 |
Q: What is the difference between 'const char*' and 'char*const'?
declares a constant pointer which has both read and write access to a character (or character array). The pointer itself is a constant and you can not change it. Like all other constant variables, you must initialize it with a constant value at the same ... | <urn:uuid:00759b03-8145-4008-acef-8bfe8ef65f88> | 3.078125 | 145 | Q&A Forum | Software Dev. | 54.315339 |
The WhatObject is the name of a table or query.
Each condition is written as a SQL operation using the formula:
Column operator Value
In this case, the WHERE operator resembles a conditional statement. The Condition1 is the first that would be examined. If the first condition is false, the whole statement is false and ... | <urn:uuid:5d4009d2-d22c-4a87-873d-21987ddb6ef4> | 3.078125 | 231 | Tutorial | Software Dev. | 33.307955 |
“Most of the scientific evidence suggests these summer rains are highly
likely to be a consequence of global warming; at the very least, global warming science predicts more turbulent weather, including more heavy downpours
- just what has happened.”
Jackie Ashley - Monday July 23, 2007, The Guardian
“It wasn't meant t... | <urn:uuid:ff3b12d6-6e1a-4c93-8baf-4cd6b0cee838> | 2.78125 | 257 | Personal Blog | Science & Tech. | 51.764294 |
Okay, so the sun doesn't really have tornados in the same way that Earth does. But the shifting of warmer and cooler plasma across the sun's surface can create similar-looking phenomenon — in this case, a spiraling inferno as large as the Earth itself.
This "tornado" is caused by cooler plasma shifting back and forth a... | <urn:uuid:b20015f9-39c3-4fba-9022-7e35a6b1069e> | 3.078125 | 154 | Truncated | Science & Tech. | 52.538081 |
The Mechanics of Granular Materials (MGM) project studied how cohesionless granular materials, like sand, deform under pressure. The microgravity environment of the space shuttle provided a laboratory for testing these materials under low-stress conditions, and may help us better understand how to work with sand and so... | <urn:uuid:e8820eea-0f52-4d56-a7f2-b8c1e45508d2> | 3.234375 | 571 | Knowledge Article | Science & Tech. | 32.010052 |
New Scientist has a tantalising snippet reporting on a shortly to be released and potentially important new study challenging the idea of ‘mirror neurons’.
Mirror neurons fire both when we perform an action and when we see someone else doing it. The theory is that by simulating action even when watching an act, the neu... | <urn:uuid:c0b926d2-e537-49bb-a904-bf3edc914253> | 3.390625 | 653 | Personal Blog | Science & Tech. | 33.599795 |
Apr 26, 2012
Nano-ponds modify properties of hexagonal boron nitride layers
Hexagonal boron nitride (h-BN) is well suited as a substrate to form ultra-fast transistors with graphene. In many examples and prototypes that have been reported, h-BN layers are mechanically exfoliated onto silicon oxide supporting substrates... | <urn:uuid:4f8c4a3c-be20-415a-8148-13bdbdb9e90d> | 2.703125 | 444 | Academic Writing | Science & Tech. | 32.26467 |
In case you were absent from physics class that day, here's a visual explanation of the concept behind atomic energy. A neutron is fired at an isotope of uranium, which causes it to split and throw off other neutrons. Each neutron hits another uranium nucleus, which then splits and throws off neutrons, causing a chain ... | <urn:uuid:eda62d09-e460-4d59-a57f-71dbce33593c> | 3.703125 | 144 | Truncated | Science & Tech. | 48.134714 |
If an object is acted on by equal and opposite forces then it will be in equilibrium, and it's acceleration or velocity (and so direction as well) will not be changed.
So when a ball bounces, it exerts a force on the floor, which matches the magnitude of the force in the opposite direction (the ball is bouncing perfect... | <urn:uuid:8439aa5a-f9ad-4224-aeb4-82ecb7a1eee0> | 3.1875 | 124 | Q&A Forum | Science & Tech. | 54.877667 |
If you had two bodies with the same weight but one having mass concentrated more in the center, while the other had most mass concentrated on the outside, but both had the same center of mass and gravity, and an equal force was applied on the same spot on both, would the torque induced be different?
The definition of t... | <urn:uuid:d05f0d84-2ebe-44ef-9ddd-e67c3538952a> | 3.140625 | 124 | Q&A Forum | Science & Tech. | 47.330018 |
The Dark Side
"Two groups" studying the same phenomenon of Type Ia supernovae, and both using the National Optical Astronomy Observatory (NOAO) telescopes in Cerro Tololo, Chile simultaneously announced dark energy in 1998. This was hailed by SCIENCE magazine as "Breakthrough of the year."
The largest group in Berkeley... | <urn:uuid:2cb260e7-c441-412c-8561-8b017555682d> | 3.125 | 558 | Personal Blog | Science & Tech. | 48.227394 |
PREVIOUSYEAR Function (DAX)
Returns a table that contains a column of all dates from the previous year, given the last date in the dates column, in the current context.
To understand more about how context affects the results of formulas, see Context in DAX Formulas.
This function returns all dates from the previous ye... | <urn:uuid:e6ec23ea-b334-4879-8240-2ac59bd798b7> | 2.765625 | 320 | Documentation | Software Dev. | 41.873595 |
The TEI scheme defines two generic pointer elements which support both inter and intra document linkage: <xptr> and <xref>. The only difference between them is that the former is empty, while the latter can contain phrase-level elements or PCDATA. The content of an <xref> is typically a string indicating how the link i... | <urn:uuid:637fec08-c319-4e09-9d64-a29bf291c928> | 3.15625 | 1,255 | Documentation | Software Dev. | 48.371155 |
Molecular Synthesis, Structure, and Bonding
From the early days of the Chemical Revolution, scientists concerned themselves with how and why compounds form. Jöns Jakob Berzelius, for example, working in the first half of the 19th century, proposed that compounds were formed from atoms because of opposite electrical cha... | <urn:uuid:454b0e4c-87f1-4889-8a5d-490f3708d605> | 3.6875 | 587 | Knowledge Article | Science & Tech. | 30.474348 |
Implications of global climate change for snowmelt hydrology in the 21st century
Adam, J.C., A.F. Hamlet, and D.P. Lettenmaier. 2009. Implications of global climate change for snowmelt hydrology in the 21st century. Hydrological Processes 23(7), 962-972.
For most of the global land area poleward of about 40° latitude, ... | <urn:uuid:59d14ae6-0dcf-45a8-a787-0daa41bedd30> | 2.6875 | 435 | Academic Writing | Science & Tech. | 24.297981 |
Science Focus Topic 3 Notes: Environmental Choices
| Print |
Your Ecological Footprint
We depend on the environment and we are part of the environment. Sustainability means that the resources from the environment can be replaced as quickly as they are used. Are we putting back what we take out, or, are we using up all ... | <urn:uuid:182e0d5b-f528-4e30-81f1-6c523d15cdd8> | 3.875 | 339 | Knowledge Article | Science & Tech. | 26.422023 |
PLEASE NOTE: Your web browser does not have
enabled. Unless you
, your ability to navigate and access the features of this website will be limited.
Amino acids are the building blocks of proteins and DNA. They are molecules that have an amino group (NH2) | <urn:uuid:16f68a94-b8f1-4a16-90f6-b7f436b3a8ac> | 2.828125 | 58 | Structured Data | Science & Tech. | 45.821061 |
New results from a drilling expedition off Antarctica may help scientists learn more about a dramatic turn in climate 34 million years ago, when the planet cooled from a “greenhouse” to an “icehouse” state. In just 400,000 years – a blink of an eye in geologic time – carbon dioxide levels dropped, temperatures plunged ... | <urn:uuid:cb207402-dc07-4a12-bc26-bfdaf0166e9d> | 3.296875 | 529 | Content Listing | Science & Tech. | 32.174475 |
As far as bacteria are concerned, other living creatures are just another niche to exploit, which means that pretty much every animal and plant has a set of bacterial pathogens that come along with it. These bacteria have made the animal in question their speciality, and are highly adapted to live inside their hosts. W... | <urn:uuid:fcc494d8-bc47-4d30-8abb-ce688912aba2> | 3.046875 | 204 | Knowledge Article | Science & Tech. | 31.465395 |
Museum of the science of future
Philosophy of evolution, history and life
The concept of physics acceleration is very simple since it is the change in velocity per unit of time. Relationship of gravity with the acceleration in movement on globine.
The concept of definition of physics acceleration is very simple since i... | <urn:uuid:34145fd6-e547-4313-b85f-87e8e41a3046> | 3.515625 | 1,705 | Nonfiction Writing | Science & Tech. | 21.4212 |
More In This Article
Editor's Note: We are posting this feature from our March 2002 issue because of news from the annual meeting of the American Astronomical Society about the phenomenon discussed here.
With each day’s newspaper seems to arrive a new astronomical discovery: a new celestial body, a new physical process... | <urn:uuid:7cca56f7-fe8b-4f1a-89f5-08d7eaeae681> | 3.90625 | 726 | Truncated | Science & Tech. | 36.207002 |
Three decades after the first Apollo landing on the moon, the debate between proponents of manned and unmanned space missions has not changed a great deal. But many space scientists who work with robotic satellites, including me, have gradually moved from opposing human spaceflight to a more moderate position. In speci... | <urn:uuid:aa87e5cd-2faa-4518-8cc7-62466ed10841> | 3.53125 | 228 | Truncated | Science & Tech. | 33.206887 |
Life as We Know It
Octopuses, Dinosaurs, Pandas and More...
- By Abby Callard, T.A. Frail, Megain Gambino, Abigail Tucker, Sarah Zielinski
- Smithsonian magazine, February 2010
Veined octopuses hide in discarded coconut shells, scientists in Indonesia discovered. An octopus may even carry multiple shells for future use... | <urn:uuid:34a1a07a-c179-4f1a-9c79-e884235630bd> | 3.234375 | 394 | Content Listing | Science & Tech. | 36.155658 |
This should be a quick review about acids and bases and some of their properties.
This covers all the information in the reading - print the notes, read the text and add your additional comments as you go.
Summary of chapter 15.
Some simple examples of how to identify conjugate acid-base pairs according the Bronstedt-L... | <urn:uuid:3ca85c44-cfa0-4dfd-9003-5ee7521affaa> | 4.28125 | 299 | Tutorial | Science & Tech. | 52.804839 |
Resource Type: Tools / Applications
Based on input from more than 100 experts, this book aims to provide the most detailed assessment ever of the worldwide distribution and conservation status of national parks and reserves. It examines the relationship between people and protected areas, investigates threats and oppor... | <urn:uuid:b2f5c909-0a8c-4d59-959f-47ceaa8c9410> | 2.921875 | 284 | Content Listing | Science & Tech. | 26.304857 |
Mean (2 of 4)
The geometric mean is the nth root of the product of the scores. Thus,
the geometric mean of the scores: 1, 2, 3, and 10 is the fourth root
of 1 x 2 x 3 x 10 which is the fourth root of 60 which equals 2.78.
The formula can be written as:
Geometric mean =
where ΠX means
to take the product of all the valu... | <urn:uuid:4a5f0e0a-08fa-49dc-974a-f32965b3cd43> | 2.890625 | 161 | Knowledge Article | Science & Tech. | 76.791692 |
Black Widow Spiders
Description, habits, and life cycle.
Brown Widow Spiders
Offers identification tips and photographs for the poisonous Brown Widow, whose hourglass marking is orange to yellow orange in color.
Wikipedia: Widow Spider
Article about widow spiders, members of the spider genus Latrodectus that includes a... | <urn:uuid:b6edcb3c-f58e-43ee-9ff5-3d9495978a5a> | 2.875 | 86 | Knowledge Article | Science & Tech. | 21.269167 |
Things You Will Need
- 5-inch by 5-inch square of waxed paper
- Medicine dropper or plastic straw
- Place the 5-inch square of waxed paper on a newspaper article.
- Using the medicine dropper or plastic straw, place a small drop of water onto the waxed paper.
- Look through the drop of water at the newsprint.
- Enlarge... | <urn:uuid:379f8c91-1c59-4656-a45f-cac54bab8e66> | 2.984375 | 258 | Tutorial | Science & Tech. | 56.797679 |
In mathematics, a binary operation is commutative if changing the order of the operands does not change the result. It is a fundamental property of many binary operations, and many mathematical proofs depend on it. The commutativity of simple operations, such as multiplication and addition of numbers, was for many year... | <urn:uuid:7de6788e-27cf-4262-ba90-7534715323c6> | 4.1875 | 2,500 | Knowledge Article | Science & Tech. | 28.185052 |
Photoperiodism is the physiological reaction of organisms to the length of day or night. It occurs in plants and animals. Photoperiodism can also be defined as the developmental responses of plants to the relative lengths of the light and dark periods. Here it should be emphasized that photoperiodic effects relate dire... | <urn:uuid:6fae4f8f-9ff1-4e75-857e-c6a4fae62b7e> | 4.46875 | 1,664 | Knowledge Article | Science & Tech. | 47.680446 |
A drum vibrates at characteristic frequencies, depending mainly on the size, shape, tension, and composition of its sound-generating drumhead. This spectrum of frequencies—the set of pure tones produced by a vibrating membrane stretched across a frame—gives a drum its particular voice.
Physicists and mathematicians hav... | <urn:uuid:287aa0fe-b54c-466f-b30b-48bcbdeb109d> | 3.859375 | 580 | Personal Blog | Science & Tech. | 41.415801 |
|Simulated into extinction?|
Scientists at the Brown University have, using climate models, simulated the fate of the 15 species of frog in the US. None of the frogs are currently endangered, but after going through the Brown simulation, "eight species would be extinct or, at best, endangered in 2100".
Here is one of t... | <urn:uuid:dbdf8d77-5c38-4652-ab1b-ecebc1d1c878> | 3.3125 | 244 | Personal Blog | Science & Tech. | 42.403758 |
I am not sure what your level is, but I think you will find that material on accelerator structures generally requires upper division E&M. However in terms of concepts, this overview and these pictures (from Illinois Tech) will go a long way toward answering the questions you have lined out.
- In a drift-tube linac, th... | <urn:uuid:0984f3c0-1a21-4fdb-9b57-52445f4bc63d> | 3.296875 | 327 | Q&A Forum | Science & Tech. | 51.140221 |
Science news stories in this week’s Science in the News-letter include a topical example of bioaccumulation of toxins in a food chain, a new hope in the eradication of malaria and a worrying climate change milestone.
Last week saw the 60 year anniversary of the famous discovery by Watson and Crick which heralded the st... | <urn:uuid:d587ee09-af36-4922-9099-ddbda4121dc5> | 3.3125 | 679 | Content Listing | Science & Tech. | 44.861771 |
The goal of space-based solar power is to provide clean energy whose collection and use is safer than the current carbon-based alternatives. An interesting concern was raised by a person who blogged in response to the posting by my friend, Noah Shactman, in the “Danger Room.” The blogger writes:
“If the conversion effi... | <urn:uuid:5f660e9f-0814-4d5a-8e1d-b60c5f5a2aca> | 2.984375 | 272 | Personal Blog | Science & Tech. | 52.502607 |
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.
...on their cell walls, and these algae produced extensive limestone formations. The Charophyceae, as represented by the large stoneworts (order C... | <urn:uuid:5d344e31-96bf-4332-a2eb-c0207510289c> | 3.765625 | 230 | Truncated | Science & Tech. | 38.182563 |
Biology continues to prove itself weird almost (but not quite) beyond imagining. A press release from the University of Gothenberg, Sweden, quotes scientist Sam Dupont [pictured here, with two eyes] as saying:
“We argue that the entire adult sea urchin can act as a huge compound eye, and that the shadow that is cast by... | <urn:uuid:2f95562b-7e2b-4992-96f9-230427c3ad58> | 2.953125 | 176 | Personal Blog | Science & Tech. | 25.993514 |
a hot air balloon leaves the ground to 170 feet. if it then climbs an additional 80 feet. How far above the ground is the balloon?
In a scene in an action movie, a stuntman jumps from the topof one building to the top of another building 4.0m away. After arunning start, he leaps at a velocity of 5.0m/s at an angle of 1... | <urn:uuid:f44d14c0-009a-4c0e-b52d-9f8b221abbb7> | 3.09375 | 515 | Content Listing | Science & Tech. | 123.641297 |
Two trains 140 meters and 160 meters long run at the speeds of 60 km/hour and 40 km/hour respectively in the opposite directions on parallel tracks. Find the time in seconds which they take to cross each other.
Let's solve this using geogebra. First we will have to represent the two trains.
1) Scale the x - axis from -... | <urn:uuid:2787ebf4-bebe-411a-87a1-ab1d4e838a85> | 3.890625 | 380 | Q&A Forum | Science & Tech. | 101.909716 |
Dams offer other advantages. They are most commonly used to generate electricity through water power, to charge water-supply systems, and to create artificial lakes for recreation.
However, dams can harm the environment. They interfere with fish migration and habitat for other wildlife by reducing water flow.
Downstrea... | <urn:uuid:66349c9e-56af-4066-8d7c-9a11527e429f> | 3.34375 | 187 | Knowledge Article | Science & Tech. | 33.827155 |
|Aug6-12, 02:45 AM||#1|
Gas Displacement and Pressure
Hi. I was just wondering if gases displace each other. For example, if I set up an apparatus to produce oxygen gas like the one shown in this diagram
would the oxygen produced in the flask displace the air that is already present in the apparatus? Or would the oxyge... | <urn:uuid:8523e86a-463e-4e52-a268-4bf817cd423d> | 2.828125 | 247 | Comment Section | Science & Tech. | 35.047368 |
For longer versions of these and other
Matter & Energy stories, visit www.sciencenews.org
gets an update
By Devin Powell
By playing with plastic blocks that stick
and slip much like rock, physicists are
challenging centuries-old ideas about the
nature of friction. Seemingly unimportant differences at small scales can h... | <urn:uuid:c2912f34-0354-40ba-9330-d5ff4c646859> | 3.78125 | 766 | Content Listing | Science & Tech. | 39.195125 |
Late Pleistocene Musk Ox Populations Contracted and Expanded Naturally Without Going Extinct
Campos, P.F., Willerslev, E., Sher, A., Orlando, L., Axelsson, E., Tikhonov, A., Aaris-Sørensen, K., Greenwood, A.D., Kahlke, R.-D., Kosintsev, P., Krakhmalnaya, T., Kuznetsova, T., Lemey, P., Macphee, R., Norris, C.A., Shepher... | <urn:uuid:94812af6-9998-4646-9212-af82c0e210ef> | 3.390625 | 783 | Academic Writing | Science & Tech. | 54.593893 |
Coral reefs are famous for their beautiful colours, but in fact when I visit them I am usually surprised how colourful reefs AREN’T. Most healthy corals have a sort of dusty tan or pink hue to them, and it’s only on reefs with particularly high coral cover, superb water clarity and bright overhead sun that you really s... | <urn:uuid:490ac755-b0ff-45d9-877a-c2a484ed191a> | 3.171875 | 426 | Personal Blog | Science & Tech. | 41.553929 |
I have a point m outside a sphere. The sphere center is o and r is the radius of sphere. Distance from point m to o is l.
If we draw a line from m to any point on the surface of sphere, this line has a length. Minimum length is l - r and maximum length would be l + r.
I want the function for distance from m to any poin... | <urn:uuid:cafcc8e8-ee54-4a63-9108-c586c7ff5517> | 2.875 | 101 | Q&A Forum | Science & Tech. | 87.363636 |
Jan 19, 2001, 11:41 AM
Post #1 of 1
(From the Perl FAQ)
What modules and extensions are available for Perl
What modules and extensions are available for Perl? What is CPAN? What does CPAN/src/... mean?
CPAN stands for Comprehensive Perl Archive Network, a huge archive replicated on dozens of machines all over the world... | <urn:uuid:2e6f4d8c-236c-433d-962c-b7e418c95775> | 2.890625 | 440 | Comment Section | Software Dev. | 46.573414 |
Lessons from Past Climate Predictions: Don Easterbrook
Posted on 29 June 2011 by dana1981
This is the first in what we plan to be a long series of posts evaluating climate predictions by both so-called "warmists" and so-called "skeptics" re-posted on "skeptic" blog WattsUpWithThat (WUWT) in which he predicted imminent ... | <urn:uuid:6b4719a0-a1d1-4dfa-bd5d-aad0b003a7ea> | 3.203125 | 1,356 | Personal Blog | Science & Tech. | 40.159917 |
There’s only one colony of silver studded blues in Snowdonia and that’s at Hafod Garegog National Nature Reserve, between Porthmadog and Beddgelert. It’s one of only six sites in Wales and the only site in the UK on wet peatland, but this summer of wet weather could wipe it out.
They need the help of black ants. The fe... | <urn:uuid:715c2f35-4f5d-4267-9eee-18f5b7c01028> | 2.796875 | 280 | Personal Blog | Science & Tech. | 54.791667 |
|Is this one galaxy or two?
This question came to light in 1950 when astronomer
chanced upon this unusual
On the outside is a
ring dominated by bright blue stars,
while near the center lies a ball of much redder stars
that are likely much older.
Between the two is a
gap that appears almost completely dark.
How Hoag's O... | <urn:uuid:e3e14e07-8d84-4228-a290-02ba85ecd973> | 2.875 | 222 | Knowledge Article | Science & Tech. | 28.693481 |
To really describe patterns well requires some UML. I'll see how I can do with text: The most popular pattern is the Singleton Pattern. This is where you have only one instance of a class. Usually, there is a method called getInstance() or getSingleton() or something similar. It will have a static variable that starts ... | <urn:uuid:b5a42535-eed1-43c1-94da-463390d320d6> | 2.96875 | 493 | Comment Section | Software Dev. | 61.248173 |
Welcome to the Space-Time Lab
This Java applet demonstrates some physical effects of Einstein's Special Relativity. On the left is a graph of "space", in each experiment you will see objects moving through space here. On the right is a space-time diagram of all the objects and the observer. In general,
|BLUE = Object||... | <urn:uuid:50ca817e-55d9-4bfe-ad8a-1fb93e45cb49> | 3.65625 | 369 | Tutorial | Science & Tech. | 59.470263 |
The Central Alabama Tornadoes of 6 March 1996Kevin J. Pence, John T. Bradshaw, and Mark W. Rose
National Weather Service, Birmingham, Alabama
(Paper published in the AMS Preprints of the 19th Conference on Severe Local Storms
14-18 September 1998 - Minneapolis, Minnesota)
Six tornadoes, two of which were deadly, formed... | <urn:uuid:fc747f3e-ba8b-4560-9f43-18ccccfe4a54> | 2.875 | 2,588 | Academic Writing | Science & Tech. | 50.040494 |
Build A Round Hole Feature
The ROUNDHOLE sample program demonstrates how to create a STEP round hole feature. This program builds a sample product and then attaches a round hole feature to it. The program just creates the parametric description for the feature (circular profile swept along a linear path) and gives it a... | <urn:uuid:4455ee90-c076-4c04-bcb4-70485e44d73e> | 3.140625 | 404 | Tutorial | Software Dev. | 50.022225 |
Intelligence Gathering: The Study of How the Brain Evolves Offers Insight Into the Mind
October 29, 2004
by Seth Shostak - Senior Astronomer
Is there really life out there? Was a kinder, wetter Mars once dotted by bacterial blooms whose progeny now await our discovery? Do unseen, alien microbes swim in the buried ocean... | <urn:uuid:7872e897-b5eb-479e-8d72-d018db0d3e87> | 3.125 | 1,416 | Nonfiction Writing | Science & Tech. | 48.374108 |
After determining which constellation to observe, you will match your nighttime sky with one of the magnitude charts of that constellation. This will determine the magnitude of the faintest stars that you can see at your location. (Magnitude Charts are included in the printable Activity Guide.) You might see more stars... | <urn:uuid:935d810a-0d83-4bfb-8a1d-68c34675f82e> | 4.15625 | 202 | Tutorial | Science & Tech. | 57.996641 |
I understand that the imidazole ring in histidine is aromatic. I also realize that it retains it's aromaticity when protonated. I am wondering why it is not mentioned at all in basic text books such ...
Spent a half hour googling this and the best I could find was this: Now for some rhymes: Arginine = R. R we having fu... | <urn:uuid:3144f496-5a48-4f40-bd27-fb907898de76> | 2.890625 | 281 | Q&A Forum | Science & Tech. | 63.071698 |
Studies: concentration of atmospheric CO2 influences climatic fluctuation both ancient and modern.
Despite its catchy name, Marine Isotope Stage 11 (MIS 11) is not a science fiction film but, instead, a climatic regime similar to our own that endured from 424,000 to 374,000 years ago. During MIS 11 the world’s orbital ... | <urn:uuid:46fa4ed2-743f-4f77-ae78-c4897709472b> | 3.296875 | 183 | Truncated | Science & Tech. | 29.533333 |
Improved support for character set handling was added to MySQL in
version 4.1. This support enables you to store data using a
variety of character sets and perform comparisons according to a
variety of collations. You can specify character sets at the
server, database, table, and column level. MySQL supports the use
of... | <urn:uuid:5277fa67-3c69-44e4-9cb2-620d771dbd4e> | 2.890625 | 385 | Documentation | Software Dev. | 46.22895 |
The global warming problem resembles the dilemma faced by a driver on a foggy road. It is desirable to move rapidly towards one’s destination, but one’s speed must be governed by the distance that one can see ahead, and by the ability to make rapid changes in direction. Reasonable people will differ in their estimates ... | <urn:uuid:8b87fc51-bf8f-40c6-9b84-0034f364bb16> | 3.09375 | 282 | Academic Writing | Science & Tech. | 28.523494 |
Staff Picks: Books
Staff-recommended reading from the
This Week in Science History Mar. 24
Here are some highlights from this week in science history. To learn more about these intriguing science topics, just click on the underlined words in blue print to access the library catalog. I hope they pique your interest!
Mar... | <urn:uuid:57c64a9c-04de-411e-9c12-1cc6ceec6acb> | 3.109375 | 443 | Content Listing | Science & Tech. | 40.697078 |
Sam's Home || Chameleon Home || Chameleon Graphing Java Applet || Ask Dr. Math
Finding Points in the Plane
We can find every point in the plane using two numbers. These numbers are called coordinates. We write a point's coordinates inside parentheses, separated by a comma, like this: (5, 6). Sometimes coordinates writt... | <urn:uuid:c56abb72-e405-4cb5-b473-df44fc6f4c94> | 3.9375 | 311 | Tutorial | Science & Tech. | 76.427525 |
Describe geometrically the set of all points in the plane with coordinates of the form m(0,1) + n(1,1), where m and n are integers
Well (0,1) and (1,1) form a basis for the entire plane, don't they?
You can describe any point in the two-dimensional plane using a linear combination of (0,1) and (1,1). eg. If you want to... | <urn:uuid:0e1ccfe5-2162-4df5-b4a2-dccab3c87efc> | 2.765625 | 207 | Q&A Forum | Science & Tech. | 108.17701 |
Motion and Mass on a Track
Name: Brian J.
(2) equal-size metal spheres, (1) aluminum, (1) gold, and a long,
straight track with a U-curve at the end.
(ignore friction; gravity will not matter either because the track is
either horizontal if on earth, or is in space)
If each sphere in turn is pushed at the same speed al... | <urn:uuid:7dbeee9b-2903-49ce-9f8f-405c8a93e7f0> | 3.84375 | 703 | Q&A Forum | Science & Tech. | 59.77643 |
We are given a regular icosahedron having three red vertices. Show
that it has a vertex that has at least two red neighbours.
What happens to the perimeter of triangle ABC as the two smaller
circles change size and roll around inside the bigger circle?
Three frogs hopped onto the table. A red frog on the left a green i... | <urn:uuid:8a91b857-ce00-45a3-925b-7e6a3312b0c7> | 3.640625 | 1,536 | Content Listing | Science & Tech. | 68.077391 |
when i sit in a room....i can hear voices coming from the adjacent room but the light in adjacent room does not enter my room i.e. sound waves travels through the wall but light waves can't.why?
Whether any form of wave can pass through an object depends on how strongly that wave is reflected, scattered or absorbed.
So... | <urn:uuid:261845e4-53a8-4235-b0f7-3bd579c4e32a> | 3.1875 | 811 | Q&A Forum | Science & Tech. | 63.891281 |
It seems like a dying art, but I still strongly feel that Entity Relationship Diagrams (ERD) should be the starting point of all software development projects. Since they are for me anyway, I wanted a place to refer colleagues to for how to read these diagrams, and an Entity Relationship Diagram Example seemed like a g... | <urn:uuid:a54bf923-51ee-46dd-aad6-3bfac4b67ae6> | 3.5 | 1,380 | Personal Blog | Software Dev. | 42.153288 |
Please tell me the solution for following two line code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
int *p =(int*)&c;
print("%x \n, %d \n, %d\n", p, *p, c);
84148994 ( but here it should print 2 right but not printing )
why it is printing like that
tell me the concepts behind this, please I don't want simple solution ... | <urn:uuid:e0a04cf9-20cb-44ed-9936-c8389c92a022> | 2.984375 | 469 | Comment Section | Software Dev. | 84.401577 |
Can someone help me with writing C++ program using loop for the following fragment..
I tried damn hard to do so, but nothing i achieved.
The fragment looks like this:
& & & & & & & & &
8 Months Ago
Related Article:Visual Studio runs code from another file
is a solved C++ discussion thread by StickyTape that has 18 repl... | <urn:uuid:b15c3786-bf62-4ed7-813a-8018ac581a43> | 3.265625 | 452 | Comment Section | Software Dev. | 66.929558 |
What is it?
It is an invertebrate (a creature with no backbone). It
had a body with an outer skeleton. The body had three
different segments, called lobes.
When did it live?
Sometime in a period from 345 to 315 million years
Is this type of creature extinct?
Yes. They have been extinct for more than 200 million
years. ... | <urn:uuid:58b4360e-3b60-49ab-b135-3f878bfa54d4> | 3.203125 | 163 | Knowledge Article | Science & Tech. | 73.084811 |
APPLICATIONS OF TECHNOLOGY:
- Oil well logging
- Cargo screening
- Research with neutron sources
- More energy efficient and compact than existing neutron generators
- Fewer risks to health and the environment than isotope sources
- Similar tritium-tritium energy spectrum as that of Am-Be decay and existing ion generat... | <urn:uuid:120017fb-a78c-4e30-a009-e0575efbab9c> | 3.796875 | 696 | Academic Writing | Science & Tech. | 25.464663 |
Python4Kids: New Tutorial - Keeping Code
Apr 21, 2011, 02:03 (0 Talkback[s])
(Other stories by brendanscott)
[ Thanks to Brendan Scott for this link. ]
"Well, so far we've learnt about storing data (either flat in
file, or as an object which Python does in pickles which are also
data in files, but with some structure) ... | <urn:uuid:3b827adc-a3c2-449f-b1f8-ae99f5da6e87> | 2.75 | 220 | Truncated | Software Dev. | 45.541951 |
Dimension and shape, e.g., length, width, perimeter, area,
Pattern and relationships, e.g., inter relationships of
Data and chance, e.g, sampling, prediction, data analysis,
Change, e.g., compound interest, exponential growth, cycles,
and present and future value.
Mathematical Ideas and Information
Mathematical ideas a... | <urn:uuid:fed79475-af42-47a1-ab10-2c0357aa8264> | 4.375 | 292 | Knowledge Article | Science & Tech. | 37.076429 |
Soil pH Earth
Country: United States
Date: November 2006
What is soil PH? Is it better for the ph to be
high or low.
pH is a measure of soil acidity. Low pH soils are acid and high pH
soils are basic. Soils east of the Mississippi river tend to be acid
while those to the west tend to be basic. The pH controls what mine... | <urn:uuid:95f9b22e-138c-4869-9ccd-d6d6b4f729bb> | 3.28125 | 323 | Knowledge Article | Science & Tech. | 69.912943 |
How big is a photon?
The main thing to remember about photons is that they are not quite like
'really little balls'. They do not actually have a defined, single size -- it
depends on what you are doing with them.
Really small things like photons are just weird -- they do not act the same
as objects that are "our" size.... | <urn:uuid:adf1f545-fd35-4814-8e0b-f9911e5c9bed> | 3.703125 | 309 | Q&A Forum | Science & Tech. | 52.423043 |
River nitrogen export to the worlds oceans
This paper discusses historical and future anthropogenic disturbance of river nutrient loads and export to coastal marine systems, which is a major global problem affecting water quality and biodiversity. In aquatic systems inputs of N and P stem from point and nonpoint source... | <urn:uuid:5e46ab08-8f07-425a-b9ee-1e14d2bbbde3> | 2.734375 | 167 | Truncated | Science & Tech. | 23.191562 |
Meteors are streaks of light, usually lasting just a few seconds, which people occasionally see in the night sky. They are sometimes called "shooting stars" or "falling stars", though they are not stars at all. Meteors are caused by the entry of small pieces of rock, dust, or metal from space into the atmosphere at ext... | <urn:uuid:2aae20ab-d210-43c9-9520-4f1bb225adfb> | 4.03125 | 645 | Knowledge Article | Science & Tech. | 52.102051 |
Picture of Linus Pauling
Linus Pauling was an American chemist who lived between 1901-1994. He was the first person to apply quantum mechanics to chemistry, and made great progress in the field of molecular biology.
Pauling first explained how atoms combine to form molecules and the nature of the chemical bond. He also... | <urn:uuid:ec4f0a85-19a1-40f4-9407-4f236da90cd4> | 3.234375 | 540 | Content Listing | Science & Tech. | 49.189252 |
Usually, there are dark spots, typically 50 to 150 feet wide, that are spaced several hundred feet apart and that appear every southern spring as the Sun rises over the icecap. The dark spots last for several months and then vanish, only to reemerge the following year after winter's cold deposits a fresh layer of ice o... | <urn:uuid:a31cbbb1-7a74-4777-b7fc-44f19fdd87f0> | 3.4375 | 798 | Knowledge Article | Science & Tech. | 69.957111 |
The purpose of the
classmethod() function is to
convert a method into a class method.
For a discussion of the purpose and usage of class methods,
see Section 26.5, “Class methods”.
There are two ways to declare a class method within a class:
You can use the function decorator syntax to declare that
classmethod is a dec... | <urn:uuid:9f9753ce-059f-498c-a226-de03331ef7f9> | 2.828125 | 148 | Documentation | Software Dev. | 38.947301 |
It is usually not difficult to locate reliable data for standard gases, small organic molecules, and common inorganic substances in pure form, along with their aqueous solutions and well-known binary systems. Standard reference tools like the CRC Handbook, the NIST WebBook, and DIPPR can answer many of these basic ques... | <urn:uuid:f0b573da-fd03-4bdf-9034-285bbe776a4f> | 2.703125 | 327 | Knowledge Article | Science & Tech. | 20.644282 |
Baby, It’s Cold Outside
Australian newspaper columnist Andrew Bolt recently observed that there’s an embarrassing gap between what the experts have long said the symptoms of global warming would look like and the bitter winters much of the world has experienced over the past few years.
Bolt assures us we haven’t imagin... | <urn:uuid:0a0b6ce0-f819-4044-899e-5a5a755e9003> | 2.96875 | 1,026 | Personal Blog | Science & Tech. | 41.295144 |
Copyright © University of Cambridge. All rights reserved.
|Equilateral triangles have three sides the same length and three angles the same. Can you make them fit together to cover the paper without any gaps between them? This is called 'tessellating'.|
What about triangles with two equal sides? These are isosceles tri... | <urn:uuid:6514f6a1-4322-421e-bdb5-417aaa56b1ad> | 3.25 | 129 | Tutorial | Science & Tech. | 46.146049 |
Crysomallon squamiferum, commonly known as the scaly-foot gastropod, was discovered in 1999 in the Kairei “black smoker” field on the Central Indian Ridge, at a depth of 2420 metres. The shell is uniquely structured to crack when hit, but in a way that absorbs energy. Image Credit: Fisheries Meiwa
Deep-sea snail shell ... | <urn:uuid:f347ccaf-1af4-424f-83f4-c33b2bd9607d> | 3.515625 | 853 | Personal Blog | Science & Tech. | 41.599447 |
What is a Natural Product?
Every cell is made up of chemicals. Substances such as lipids make up the cell membrane. Proteins, such as actin and tubulin, give the cell shape. Other proteins (enzymes) carry out chemical reactions within the cell. All of these types of chemical compounds (proteins, lipids, triglycerides, ... | <urn:uuid:178a2958-06bf-415e-b283-527eed427c9d> | 3.78125 | 1,358 | Knowledge Article | Science & Tech. | 42.605597 |
ANOTHER REASON TO AVOID FOOD COOKED WITH PALM OIL:
Threatened Frogs Palmed Off as Forests Disappear
June 3, 2013 — Oil palm plantations in Malaysia are causing threatened forest frogs to disappear, paving the way for common species to move in on their turf, scientists have revealed.
The study, carried out by the Zoolog... | <urn:uuid:feb65288-0793-4700-bffc-18f9318db95b> | 2.78125 | 202 | Truncated | Science & Tech. | 25.376 |
Aaron Putnam, a postdoctoral research scientist at the Lamont-Doherty Earth Observatory of Columbia University, is a leader of an expedition to Bhutan to examine links among climate, glaciers and water resources in the Himalaya.
Friday, Oct. 12
On the morning of our final day of fieldwork, the sky darkened and the temp... | <urn:uuid:05b916ac-d844-4615-a02d-d1140d0ab47f> | 3.140625 | 1,736 | Personal Blog | Science & Tech. | 56.965491 |
Today marks the beginning of the Atlantic Hurricane season. The tropical season in the northern Atlantic runs from June 1 through November 30. Although tropical systems have and can develop outside of that time period, a vast majority of tropical systems do develop during those six months. Hurricane Sandy continues to ... | <urn:uuid:496dd05b-0bac-48e1-865c-749ec5c5caac> | 2.8125 | 1,736 | Personal Blog | Science & Tech. | 40.83875 |
In the past the Earth's climate has changed as a result of natural causes in our atmosphere.
The changes we are witnessing and those that are predicted are largely due to human behaviour. We are burning fossil fuels, and heating up the planet at the same time. We blow ever increasing amounts of carbon dioxide (CO2) int... | <urn:uuid:35dfcb0d-05bd-4a46-8d12-5f21a9982c48> | 4.0625 | 444 | Knowledge Article | Science & Tech. | 56.197745 |
An adult ant body has three main parts: The head, the thorax and the abdomen. Ants have three pairs of legs, all originating in the thorax. The front legs are specially useful: They help the ant when grabbing things and they are used in the same way as cats to wash themselves. Ants use them also to "milk" the honeydew ... | <urn:uuid:73459ae5-45a2-47ff-9508-935437413a0b> | 3.234375 | 281 | Knowledge Article | Science & Tech. | 61.22444 |
Because HTTP is a protocol based on the Request - Response scheme, every HTTP request is followed by a HTTP response. HTTP_Request offers several methods to evaluate the information from these responses.
A important part of the HTTP response is the response code. The most well-known response code probably is 404, which... | <urn:uuid:bc122574-9f78-495f-8c20-bb1f17dc4408> | 3.90625 | 209 | Documentation | Software Dev. | 65.619412 |
As I stated in the beginning of this chapter, if you've been out to the Netflix or Blockbuster Online sites, you've seen how moving the mouse over a movie-related link or image pops up information about the movie, as well as a link to add the movie to the queue. This is probably one of the best uses of tooltips I've se... | <urn:uuid:fa7880d9-178b-4a7b-a86f-36cc93428b11> | 2.78125 | 273 | Documentation | Software Dev. | 36.337816 |