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Silly newbie question - Caret character (^)
ldo at geek-central.gen.new_zealand
Tue Nov 9 23:32:32 CET 2010
In message <mailman.778.1289325458.2218.python-list at python.org>, Terry Reedy
> I've been wondering why C programmers keep writing code susceptible to
> buffer overruns ;=).
I am continually disappointed with t... | <urn:uuid:809b4dfe-a415-4e37-9763-634d235e06fd> | 2.796875 | 283 | Comment Section | Software Dev. | 56.518148 |
Supports a value type that can be assigned null like a reference type. This class cannot be inherited.
Assembly: mscorlib (in mscorlib.dll)
Thetype exposes the following members.
A type is said to be nullable if it can be assigned a value or can be assigned null, which means the type has no value whatsoever. Consequent... | <urn:uuid:ac3b5071-6238-45c0-a9bc-5448176fa124> | 3.015625 | 473 | Documentation | Software Dev. | 38.401903 |
Whales are incredibly diverse marine mammals, ranging from small pygmy whales to the blue whale, the largest animal in the world.
There are two categories of whales, baleen whales and toothed whales. Baleen whales have a broom-like structure in their mouths that allows them to filter feed on small organisms while tooth... | <urn:uuid:92b62cbd-d7b5-4abb-a7da-8b7de54fe8c5> | 3.734375 | 422 | Knowledge Article | Science & Tech. | 30.429968 |
If you take an aluminum rod and tap one end with a hammer, the disturbance travels along the rod at the speed of sound in aluminum, which is about 5000 m/s. This speed is what determines the frequency of the ringing that you hear. The speed is many orders of magnitude less than c. If it were higher than c for some othe... | <urn:uuid:7cb381f2-dcfc-4e50-9d0d-a842c88a9a9f> | 3.703125 | 591 | Q&A Forum | Science & Tech. | 39.824292 |
Sadly, global warming has become politicized. Putting all the data together is not easy. However, there are ways of approaching the matter objectively. In the end, the conclusions each of us draw will depend on our different perceptions of risks and who w
On a clear night, some regions of the sky, such as the Milky Way... | <urn:uuid:45def296-5cdb-49b1-98e6-e75b387545bc> | 3.203125 | 671 | Content Listing | Science & Tech. | 33.275304 |
Science Fair Project Encyclopedia
- anxn + an−1xn−1 + иии + a1x + a0 = 0
where n is a positive integer called the degree of the polynomial, every coefficient ai is an element of F, and an is nonzero. If the field F is the field Q of rational numbers and K is an algebraically closed field then the algebraic numbers rela... | <urn:uuid:be64c03e-2c22-4cd8-818f-a30f936e253c> | 3.734375 | 911 | Knowledge Article | Science & Tech. | 41.624635 |
Giant walking stick insect (Megaphasma dentricus)
Megaphasma dentricus is the largest walking stick species in North America. The insect measures about 75mm and 150 mm. The insect takes the appearance of a twig or small branch. The insect is found in red to brown color and in some cases they appear in shades of green c... | <urn:uuid:f009cb19-45b4-44a2-a372-b6df7150c5e1> | 3.1875 | 217 | Knowledge Article | Science & Tech. | 56.1738 |
Problem 4: Thompson Seedless Grapes
The Thompson seedless grape is triploid, with three copies of each chromosome. Which phase of the cell cycle would you expect triploid cells to be unable to complete.
The Biology Project
Department of Biochemistry and Molecular Biophysics
University of Arizona
Revised: August 2004
Co... | <urn:uuid:15352d2f-f328-4f9e-9017-cea78f5ddc45> | 2.796875 | 75 | Tutorial | Science & Tech. | 22.633462 |
Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
December 24, 1998
Explanation: Looking down from atop a Delta II rocket blasting skyward, solid fuel boosters fall away (left) and the Earth's limb ... | <urn:uuid:a78ee87a-bd43-47e2-8eb8-413862381293> | 3.3125 | 219 | Knowledge Article | Science & Tech. | 52.832141 |
2011 | 2010 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001
A study released on May 11, 2007 provides some of the first solid evidence that warming-induced changes in ocean circulation at the end of the last Ice Age caused vast quantities of ancient carbon dioxide to belch from the deep sea into the atmo... | <urn:uuid:62e9e7b6-1dff-423a-9f09-517002cdb152> | 3.734375 | 778 | Content Listing | Science & Tech. | 24.216351 |
July 15, 2004: Astronomers have directly measured the mass of a single star the first time such a feat has been accomplished for any solitary star other than our own Sun. The measurement has been done on a small red star located some 1,800 light-years from Earth. Knowing the masses of stars is important in understandin... | <urn:uuid:ce2eec42-90e2-4710-b457-41aa4a4f103e> | 3.890625 | 507 | Knowledge Article | Science & Tech. | 41.428184 |
A retrovirus called HERV-H, which inserted itself into the human genome millions of years ago, may play an important role in pluripotent stem cells, according to a new study published in the journal Retrovirology by scientists at UMass Medical School. Pluripotent stem cells are capable of generating all tissue types, i... | <urn:uuid:0b6d8a36-6432-4014-8783-27bcbfd16c91> | 3.3125 | 1,878 | Content Listing | Science & Tech. | 40.946814 |
Rechercher une page de manuel
Version: 2008-11-27 (fedora - 04/07/09)
Section: 2 (Appels système)
NAMEgethostname, sethostname - get/set hostname
int gethostname(char *name, size_t len);
int sethostname(const char *name, size_t len);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
gethostname():... | <urn:uuid:423327e3-db58-43f3-b27f-276c4be81940> | 2.828125 | 793 | Documentation | Software Dev. | 50.220057 |
Name: gonzo sulivan
Date: 1993 - 1999
What I want to know is, when a meteorite hits the moon, I notice that
the crater is still there but what happens to the meteorite? The same thing in
Arizona, where there is a big crater, what happened to that meteorite?
The meteorite breaks up into little pieces; some of it may
als... | <urn:uuid:489364ca-3a65-41b1-9274-78c1c676d7ab> | 3.0625 | 115 | Audio Transcript | Science & Tech. | 43.934485 |
Phone Book Friction
I am attempting to do a Grade 12 physics project and chose
the topic of Phone book Friction as shown in an episode of
MythBusters. The situation is that the pages of 2 phone books are
interwoven and produces an almost inseparable book. The MythBusters
crew found that 8000 lbs of force was necessary ... | <urn:uuid:809e1522-55f3-4967-959a-c620b184d412> | 2.875 | 453 | Q&A Forum | Science & Tech. | 58.367934 |
The number n is amicable if it belongs to an amicable pair. Two numbers n and m are called an amicable pair if the sum of all positive divisors of n is equal to the sum of all positive divisors of m and both are equal to n + m.
It all started with perfect numbers which are amicable with themselves. Those numbers adopte... | <urn:uuid:84474bc6-0d64-48bd-81a8-2884ff5f3011> | 2.953125 | 102 | Knowledge Article | Science & Tech. | 58.201176 |
If you took high school chemistry, you probably did a simple experiment in which you dipped pH test paper into beakers bearing various liquids and watched the strip change colors. If it was acidic, the paper turned toward the red end of the color spectrum; if it was basic, it darkened toward the violet end.
If you took... | <urn:uuid:f5828354-881b-45cd-abbb-fa34c8a5860d> | 3.578125 | 134 | Knowledge Article | Science & Tech. | 38.566522 |
This Example shows you how to Change the Content of a node in a DOM document. JAXP (Java API for XML Processing) is an interface which provides parsing of xml documents. Here the Document BuilderFactory is used to create new DOM parsers. These are some of the methods used in code given below for adding attribute:-
Elem... | <urn:uuid:8a5ec29b-2b3c-46f1-bd30-6f1a1de2e052> | 2.71875 | 202 | Documentation | Software Dev. | 51.674719 |
Dung beetles are a relatively modern group of beetles and their fossils only extend back to 40 million years ago. They belong to the family Scarabaeidae and are also known as scarabs. They are scavengers, which feed on dung and other decaying organic matter, and play an invaluable role in keeping the veld clean.
The an... | <urn:uuid:666ff77f-3e0f-4798-a141-0b498933badf> | 4.0625 | 881 | Knowledge Article | Science & Tech. | 55.580432 |
How CO2 warming is driving climate
What the science says...
In August 2010, Nature published a commentary by Penner et al. which mainly focused on the uncertainty regarding the effect short-lived pollutants (such as aerosols and black carbon) have on the climate. As is often the case, many in the blogosphere misinterpr... | <urn:uuid:2ad0418c-3d6b-45e8-83be-9727c9e850ab> | 3.53125 | 1,051 | Personal Blog | Science & Tech. | 31.720894 |
Can there be life on the Sun? Again, the speed at which chemical reactions take place is important to the existence of life. At the temperatures near the Sun, 5000 degrees and more, molecules vaporize and fly apart. That is one reason why the Sun is mostly made of atomic Hydrogen, the simplest gas, and there is no soli... | <urn:uuid:d014f318-68e9-48e9-885b-c52dd9ab382d> | 3.203125 | 99 | Truncated | Science & Tech. | 51.364313 |
Conopeum reticulum is an encrusting bryozoan, abundant in the lower intertidal zone and extending down to the shallow subtidal waters of Britain and Ireland. The species is also commonly found in estuarine and brackish environments. C. reticulum forms white patches, which resemble a thin sheet of gauze on stones and ot... | <urn:uuid:d29e4e24-c967-40b7-a83a-da618b80d552> | 3.34375 | 1,211 | Knowledge Article | Science & Tech. | 35.534603 |
SUMMARY: The European Space Agency's Mars Express has relayed images from the NASA Mars rovers for the first time, demonstrating how the robots at Mars can work with each other to keep the data flowing back to Earth. Mars Express flew over the Opportunity rover on August 4, and received 15 images which were stored in t... | <urn:uuid:99c39eae-efef-46c9-b4a5-b846716be9a3> | 3.484375 | 126 | Comment Section | Science & Tech. | 50.241705 |
Pierre Auger Observatory
|Pierre Auger Observatory|
Province of Mendoza, Argentina
|Altitude||1330 m–1620 m, average ~1400 m|
|Wavelength||330–380 nm UV (Fluorescence detector), 1017–1021 eV cosmic rays (Surface detector)|
|Built||2004–2008 (and taking data during construction)|
|Telescope style||Hybrid (Surface + Fluo... | <urn:uuid:5fb3da38-8c20-4b68-bde5-8495c65b014c> | 3.4375 | 2,615 | Knowledge Article | Science & Tech. | 36.845111 |
Monckton has updated his silly graph, and now the Cuffey and Clow graph (correctly cited this time around!), has been adapted from the original which represented temperatures in Greenland, to represent Antarctic temperatures. How exactly did he accomplish this impressive feat? The same way he took the original and made... | <urn:uuid:c7a6afa9-6dd8-4373-b366-556a36f68703> | 2.703125 | 192 | Personal Blog | Science & Tech. | 38.395794 |
The break Statement
The break statement terminates the execution of the nearest enclosing loop or conditional statement in which it appears. Control passes to the statement that follows the terminated statement, if any.
In a switch statement, break causes the program to execute the next statement after the switch. With... | <urn:uuid:0fb2c9ab-fe71-46b6-8dbb-af16c37016ce> | 3.5625 | 164 | Documentation | Software Dev. | 34.75461 |
This problem is about investigating whether it is possible to start at one vertex of a platonic solid and visit every other vertex once only returning to the vertex you started at.
Can you cross each of the seven bridges that join the north and south of the river to the two islands, once and once only, without retracin... | <urn:uuid:dc3c056c-567d-484d-b57a-93046d08ac78> | 3.328125 | 544 | Tutorial | Science & Tech. | 64.51633 |
is at your service! well some more time..The frog is an amphibian in the order Anura (meaning "tail-less", from Greek an-, without + oura, tail), formerly referred to as Salientia (Latin saltare, to jump). The name frog derives from Old English frogga, (compare Old Norse frauki, German Frosch, older Dutch spelling kikv... | <urn:uuid:cf36202a-b771-44a9-ad90-379ba9a73e12> | 3.4375 | 281 | Knowledge Article | Science & Tech. | 50.083333 |
by Vagn Lundsgaard Hansen, chair of EMS--committee on WMY 2000
Raising Public Awareness of Mathematics (RPAMaths) is probably the most important goal originally set for the World Mathematical Year 2000. And there are good reasons for that.
The role of mathematics in society is subtle and not generally recognized in the... | <urn:uuid:a45a55d3-ac3a-4db8-ae03-b2983baa16df> | 2.875 | 1,863 | Audio Transcript | Science & Tech. | 41.58322 |
Population and Agriculture
Math ExtensionPrint this Page
- Subject(s): Mathematics
- Region / Country: Asia & Pacific Islands / People's Republic of China
- Grade Level(s): 3–5, 6–8
- Related Publication: Slide show | A Taste of Tongren
Students will use information from Peace Corps Volunteer Amy Throndsen's slide show... | <urn:uuid:6c65c9a3-4eb8-45c3-8044-9716f357c5a6> | 4.1875 | 489 | Tutorial | Science & Tech. | 30.714881 |
An electrically neutral model airplane is flying in a horizontal circle on a 3.0-m guideline, which is nearly parallel to the ground. The line breaks when the kinetic energy of hte plane is 50.0 J. Reconsider the same situation, except that now there is a point charge of +q on the plane and a point charge of -q at the ... | <urn:uuid:7861358b-f20b-4ead-be28-1d498215df57> | 3.03125 | 110 | Q&A Forum | Science & Tech. | 74.432232 |
Immutable means you cannot change the contents of an object. For String, this means that once a String object has been created, it remains the same for as long as the String object exists. If you need a mutable "string" look at StringBuffer in Java 1.4 and StringBuilder in Java 5 and above.
The reason why String is imm... | <urn:uuid:b9f8bba4-e0e9-4b86-8009-f570654ab1e1> | 3.34375 | 901 | Comment Section | Software Dev. | 63.872518 |
NSW National Parks and Wildlife Service, 2002
1. Current Conservation Status
The Lord Howe Woodhen (Gallirallus sylvestris, Sclater 1869) is listed on Schedule 1 (Part 1) of the Threatened Species Conservation Act 1995 (TSC Act) as an Endangered Species. It is listed as Vulnerable on Schedule 1 (Part 2) of the Commonwe... | <urn:uuid:a6be8908-fd85-412c-988f-3af1f07d5676> | 3 | 324 | Knowledge Article | Science & Tech. | 44.770718 |
Contact: Susan Hendrix
NASA/Goddard Space Flight Center
Caption: The bottom two black spots on the sun, known as sunspots, appeared quickly over the course of Feb. 19-20, 2013. These two sunspots are part of the same system and are over six Earths across. This image combines images from two instruments on NASA's Solar ... | <urn:uuid:c3257d30-2a16-4c30-82d3-9bd3de7519c7> | 3.609375 | 177 | Truncated | Science & Tech. | 33.721762 |
Hey everyone. I'm still new to python, and programming in general... I'm writing this bit of code that will ask for the user to input a 16 digit card number, and in return scramble the data in some manner... The scrambling isn't the part that is giving me trouble.
I'm using the list feature in python to create an empty... | <urn:uuid:7c2f8f4c-8489-4476-8493-02f30997fb14> | 3.03125 | 446 | Comment Section | Software Dev. | 81.421327 |
P-Element mutagenesis in Drosophila
There has been a long history of innovation and development of tools for gene discovery and genetic analysis in Drosophila melanogaster. This includes methods to induce mutations and to screen for those mutations that disrupt specific processes, methods to map mutations genetically a... | <urn:uuid:ed0d3cb7-e3c1-4865-a5c4-2d686e84fa6c> | 3.515625 | 835 | Truncated | Science & Tech. | 36.518631 |
More than one function may be defined with the same SQL name, so long as the arguments they take are different. In other words, function names can be overloaded. When a query is executed, the server will determine which function to call from the data types and the number of the provided arguments. Overloading can also ... | <urn:uuid:a32dab8c-4b75-4f51-a592-0e111ee4074f> | 3.296875 | 445 | Documentation | Software Dev. | 49.617 |
by Staff Writers
Adelaide, Australia (UPI) Oct 10, 2012
Australian researchers say they've extended Einstein's theory of special relativity to work beyond the speed of light, but caution it only works in the math.
"Our paper doesn't try and explain how this could be achieved, just how equations of motion might operate ... | <urn:uuid:b7402fc1-f2fe-4250-ba83-0b09e13767dd> | 3.546875 | 569 | Truncated | Science & Tech. | 30.620289 |
By popular demand, a few features commonly found in functional programming languages and Lisp have been added to Python. With the lambda keyword, small anonymous functions can be created. Here's a function that returns the sum of its two arguments: `lambda a, b: a+b'. Lambda forms can be used wherever function objects ... | <urn:uuid:30bb236d-e2f7-4118-a01d-fa80c58a71dc> | 3.421875 | 151 | Documentation | Software Dev. | 43.512284 |
Every drop counts. As does every effort. Learn how you can contribute to water conservation, aquatic ecosystem restoration, and improved access to drinking water and sanitation around the globe.
More About Freshwater
Learn how to cut gallons from your household use, diet, energy, transportation, and consumer choices.
T... | <urn:uuid:d88c0f5e-7c89-4404-8583-543089dd6ca3> | 3 | 361 | Content Listing | Science & Tech. | 43.218386 |
Helios 1 was a joint German- American deep space mission to study the main solar processes and solar-terrestrial relationships. Specifically, the spacecraft's instruments were designed to investigate ... phenomena such as solar wind, magnetic and electric fields, cosmic rays, and cosmic dust in regions between Earth's ... | <urn:uuid:88b747a0-488c-4e8e-89e8-2c03b0a38879> | 3.8125 | 235 | Knowledge Article | Science & Tech. | 53.072473 |
Unpacks from a binary string into an array according to the given
unpack() works slightly different from Perl as the unpacked data is stored in an associative array. To accomplish this you have to name the different format codes and separate them by a slash /.
See pack() for an explanation of the format codes.
The pack... | <urn:uuid:b1955f43-a1a6-4ab5-8028-81e65dda6d7f> | 2.765625 | 117 | Documentation | Software Dev. | 46.091361 |
Go to Tom Ray's home page. Go to the Tierra home page.
Immune hosts now dominate memory, while parasites and susceptible hosts decline in frequency. The parasites will soon be driven to extinction. Medium resolution (35956 bytes). Higher resolution (91814 bytes).
Feel free to reproduce or publish these images, make pho... | <urn:uuid:f84b44c3-4f89-4f43-8ac7-28a842cb9447> | 2.765625 | 562 | Content Listing | Science & Tech. | 40.03 |
JAVA & J2EE
A platform-independent, object- oriented programming language used to develop from software applications to web applications.
The Java 2 Platform, Enterprise Edition (J2EE) defines the standard for developing multitier enterprise applications. The J2EE platform takes advantage of many features of the Java 2... | <urn:uuid:c5ddca73-eead-4d32-abf2-3b8f609253a9> | 2.796875 | 1,098 | Content Listing | Software Dev. | 27.249278 |
A carat is a unit of weight for diamonds and other gemstones. One carat equals 200 milligrams (0.200 grams). There are 453 grams in a pound (1,000 grams to a kilogram). Therefore, if your fiancee weighs 170 pounds, you have a 385,050-carat fiancee!
A karat, when used with gold, is a unit of purity-- 24-karat gold is pu... | <urn:uuid:2092ce51-9b77-40fc-b26f-3267c3b85316> | 3.125 | 233 | Knowledge Article | Science & Tech. | 79.041154 |
Freezing is the process when a liquid turns into a solid. Freezing occurs when heat is lost from an object, which causes the molecules to slow down and form tighter bonds. basically in short terms freezing is when, lets say, water turns into ice. Freezing is the opposite of melting, and two steps away from evaporation.... | <urn:uuid:41d08e82-545a-420c-9330-33788746e20c> | 3.4375 | 78 | Knowledge Article | Science & Tech. | 63.788857 |
and Marsden counted the deflections of alpha particles
off gold foil at different angles. Use the simulation
below to see their results!
diagrams show the overhead and side views of their apparatus.
Use the blue rotate buttons to rotate the microscope
to different angles, and the graph will count how many
particles are... | <urn:uuid:17e1efb4-933a-402f-a8f5-8cc302d7f76c> | 3.296875 | 117 | Tutorial | Science & Tech. | 53.721087 |
The first and foremost advantage of
any logging API over plain System.out.println
resides in its ability to disable
certain log statements while allowing
others to print unhindered. This capability
assumes that the logging space, that
is, the space of all possible logging
statements, is categorized according
to some de... | <urn:uuid:9631f9d7-56f9-416f-acc6-b8e046b97505> | 2.828125 | 830 | Documentation | Software Dev. | 46.611391 |
A spherical balloon is made from a material whose mass is 3.86 kg. The thickness of the material is negligible compared to the 2.16-m radius of the balloon. The balloon is filled with helium (He) at a temperature of 286 K and just floats in air, neither rising nor falling. The density of the surrounding air is 1.19 kg/... | <urn:uuid:1d1c8d5b-6076-42ce-9ca4-64f778c5c1ad> | 3.84375 | 86 | Q&A Forum | Science & Tech. | 83.725 |
The Wind in the Willows
When the atmospheric pressure varies between the horizontal points, the wind blows. As the English poet Christina Rossetti once wrote, "Who has seen the wind, neither I nor you." But that hasn't stopped us from measuring it. A wind vane is almost as old as the beginning of time. A simple pennant... | <urn:uuid:f6d1459f-82dd-468d-8545-ece5f8e41449> | 3.625 | 505 | Knowledge Article | Science & Tech. | 54.994226 |
A format specifier starts with the character ‘%’ and ends with
a format-control letter—it tells the
how to output one item. The format-control letter specifies what kind
of value to print. The rest of the format specifier is made up of
optional modifiers that control how to print the value, such as
the field width. Her... | <urn:uuid:502df51f-7d14-4613-bfc9-fbd7792bd8b8> | 3.5625 | 548 | Documentation | Software Dev. | 65.500703 |
It is native to the coastline of western North America, where it is a common kelp of the intertidal zone. It is dark brown in color, shiny and bumpy in texture, and may reach over five meters long. It grows a branching stipe from a thick holdfast. It bears long, flat, straplike fronds lined with small blades each a few... | <urn:uuid:48d13928-b59b-4d1b-bd3a-8d0f4df5fd46> | 2.75 | 110 | Knowledge Article | Science & Tech. | 48.704907 |
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an... | <urn:uuid:f5cf460b-50d1-442d-9813-c04b0699a324> | 3.171875 | 371 | Content Listing | Science & Tech. | 49.659072 |
Scientists predict rare ’hibernation’ of sunspots?
2011 06 15
By Kerry Sheridan | YahooNews.com
For years, scientists have been predicting the Sun would by around 2012 move into solar maximum, a period of intense flares and sunspot activity, but lately a curious calm has suggested quite the opposite.
According to three... | <urn:uuid:5cbf0a9f-5e58-4fa6-b5d6-2b6a4459ecbc> | 3 | 2,061 | Content Listing | Science & Tech. | 40.138515 |
NASA's Spitzer Space Telescope has at last found buckyballs in space, as illustrated by this artist's conception showing the carbon balls coming out from the type of object where they were discovered -- a dying star and the material it sheds, known as a planetary nebula.
Buckyballs are made up of 60 carbon atoms organi... | <urn:uuid:86cd9a72-0807-4f5b-ac3f-bbfa65da4756> | 3.484375 | 322 | Knowledge Article | Science & Tech. | 43.955685 |
Atmospheric Chemistry of Earth's Troposphere
When you think of chemistry, do you think about mixing colored liquids in test tubes and maybe making an explosion... or at least a nice puff of smoke? Did you know that a lot of chemistry happens in Earth's atmosphere? There are many different kinds of chemicals in the air.... | <urn:uuid:a800bdcf-e1db-440c-be70-52d8fc4c7a92> | 3.59375 | 844 | Knowledge Article | Science & Tech. | 54.262259 |
Fluids and gases can move in strange and mysterious ways that aren’t always apparent to our unaided eyes. It's only with the use of tracers or dyes, photographic techniques and a bit of luck, that we can capture fluid dynamics in action.
Here are some of the weird and beautiful ways in which fluids flow.
Supersonic Sho... | <urn:uuid:dadbd057-e7d6-46cb-881a-5f112fbe5869> | 3.375 | 213 | Truncated | Science & Tech. | 61.886842 |
A team of researchers from the U.S. Army Research Laboratory in
Adelphi, Md., and the University of Maryland in Baltimore, captured
reflected photons from a highly specialized laser beam to create a VGI
image of a remote target.
In the case of VGI, reflection does not refer to a mirror image of an
object. Rather it is ... | <urn:uuid:14bff35f-9ef9-4145-a325-c077e9e51a26> | 3.859375 | 840 | Knowledge Article | Science & Tech. | 41.320084 |
The monarch's inbuilt solar compass
Some designs defy our imagination and will probably be fully understood and certainly not improved upon. The monarch butterfly's navigation system is awe inspiring. Quite an example of "doing more with less". (GW)
How migrating butterflies use body clocks to find their way
By Steve C... | <urn:uuid:eaa26860-8158-42a2-89f2-145c0054ed36> | 3.609375 | 644 | Truncated | Science & Tech. | 41.260643 |
As I know all cells require oxygen. So my question is how efficiently can plants operate in no-oxygen atmosphere? Do all plants produce enough oxygen for themselves? Can they consume their own oxygen or the oxygen will be quickly lost to the air? Is there a plant that consumes more oxygen than they produce?
During the ... | <urn:uuid:20430785-47e6-430f-83ba-3e5a7c922ed4> | 3.09375 | 361 | Q&A Forum | Science & Tech. | 49.476834 |
Chirality and Optical Activity
|Chiral Stereoisomers||The Difference Between Enantiomers on the Macroscopic Scale|
|The Difference Between Enantiomers on the Molecular Scale|
The cis/trans or E/Z isomers formed by alkenes aren't the only example of stereoisomers. To understand the second example of stereoisomers, it mi... | <urn:uuid:a7cc3062-b819-40f7-a110-45dc3a474799> | 3.640625 | 2,242 | Academic Writing | Science & Tech. | 37.660774 |
Potassium Atomic Number: 19
Potassium Symbol: K
Potassium Atomic Weight: 39.0983
Discovery: Sir Humphrey Davy 1807 (England)
Electron Configuration: [Ar]4s1
Potassium Word Origin: English potash pot ashes; Latin kalium, Arabic qali: alkali
Isotopes: There are 17 isotopes of potassium. Natural potassium is composed of t... | <urn:uuid:395c28a9-4ff5-470d-bc2e-f66f6f65564f> | 3.53125 | 669 | Knowledge Article | Science & Tech. | 55.935882 |
Butt, Kevin R., Lowe, Christopher N., BEASLEY, Toby, HANSON, Ian and KEYNES, Randal
Darwin's earthworms revisited.
European Journal of Soil Biology, 44
Official URL: http://dx.doi.org/10.1016/j.ejsobi.2008.03.004
Down House was Charles Darwin's home from 1842 until his death in 1882 and where he wrote “The Formation of... | <urn:uuid:cd17b2e6-912f-47d5-a42e-cd782822093f> | 2.765625 | 314 | Academic Writing | Science & Tech. | 53.930495 |
The location of this disaster, Carhuaz, is very close to where one of the most tragic disasters occurred in modern world history. In 1970, a massive earthquake triggered a landslide that killed an estimated 25,000 people who lived in the city of Yungay.
Posts Tagged ‘climate change’
Posted in Environment, Peruvian News... | <urn:uuid:39a4feb8-d117-4b1d-ba8b-78b715f8d686> | 2.890625 | 1,068 | Personal Blog | Science & Tech. | 30.266945 |
Geoengineering: Whiter skies?
Article first published online: 1 JUN 2012
Copyright 2012 by the American Geophysical Union
Geophysical Research Letters
Volume 39, Issue 11, June 2012
How to Cite
2012), Geoengineering: Whiter skies?, Geophys. Res. Lett., 39, L11801, doi:10.1029/2012GL051652., , and (
- Issue published on... | <urn:uuid:c7636b91-a619-4711-b7e4-eea552d49dba> | 3.0625 | 415 | Academic Writing | Science & Tech. | 31.573841 |
Classes defined by the macros defclass! or defclass* have a set of methods for instance creation, visualisation and edition. For example if you define a class by:
(defclass! rgb-color () ((red-comp :initform 0 :initarg :red-comp :accessor red-comp) (green-comp :initform 0 :initarg :green-comp :accessor green-comp) (blu... | <urn:uuid:626b43df-f60b-446b-a9bd-e5b027441124> | 3.03125 | 711 | Documentation | Software Dev. | 47.628158 |
Earth has been experiencing an incredible increase in the number of global earthquakes just since 1973.
- In 1973, there were more than 5,000 Global Quakes
- In 1983, there were more than 10,000 Global Quakes
- In 1993, there were more than 20,000 Global Quakes
- In 2003, there were more than 30,000 Global Quakes.
We a... | <urn:uuid:31cd3bc0-9d21-4b5b-8133-393cbd0ea9f0> | 4.0625 | 927 | Knowledge Article | Science & Tech. | 52.294409 |
How Do you know if it is a meteorite?
The purpose of this page in not to make you an expert at identifying meteorites. It is to help save time and money by eliminating things that are not meteorites. Probably 99% of the items that are presented by finders as meteorites turn out to be not to be meteorites. There are a n... | <urn:uuid:522d0ff5-7b1d-4919-9196-b0ac23b4cd79> | 3.390625 | 1,761 | Knowledge Article | Science & Tech. | 57.733535 |
CH4 - Methane:
First draw the Lewis dot structure:
Electron geometry: tetrahedral. Hybridization: sp3
Then draw the 3D molecular structure using VSEPR rules:
The molecular geometry of methane - CH4 - is tetrahedral with symmetric charge distribution on the central atom.
Therefore this molecule is non-polar.
Methane on ... | <urn:uuid:6b09946e-32e6-405f-94e2-98a1b8ca3690> | 2.96875 | 125 | Tutorial | Science & Tech. | 20.298016 |
4th Grade Lesson Plan
Students will compare and contrast a coral reef and a kelp forest ecosystem and identify the abiotic and biotic factors within each.
2.a. Students know plants are the primary source of matter and energy entering most food chains.
3.a. Students know ecosystems can be characterized by their living a... | <urn:uuid:85f0f20b-4925-47d3-bd98-10153e25cf90> | 3.453125 | 103 | Tutorial | Science & Tech. | 54.775649 |
Found 0 - 10 results of 63 programs matching keyword "solar power"
Watch the beginning of Venus’s transit across the disk of the sun, one of the rarest astronomical events. Watch the conclusion of Venus’s 6.5-hour journey across the disk of the sun, one of the rarest astronomical events. Senior Exploratorium Scientist,... | <urn:uuid:96153c90-ffa2-40c0-9345-a9adc97b6f2a> | 2.96875 | 700 | Content Listing | Science & Tech. | 48.858107 |
Anatomy and Physiology
Discussion Topic: Chemistry of Life, Cells, and Tissues Select an organ and provide an example of how it uses the following: carbohydrates, lipids, proteins, and nucleic acids. Also, describe an area of interest related to one of the types of molecules, for example, cholestero...
A string under a... | <urn:uuid:07deb77b-6700-4f25-8e04-89a4bb9f80b2> | 3.609375 | 317 | Comment Section | Science & Tech. | 88.945254 |
Unit 1: Many Planets, One Earth // Section 9: The Age of Mammals
The first mammals on Earth were rodent-sized animals that evolved in the shadow of dinosaurs during the Jurassic and Triassic periods. After the K-T boundary extinction eliminated dinosaurs as predators and competitors, mammals radiated widely. Most of th... | <urn:uuid:65261dde-5c95-4198-a01c-afa024b39ab7> | 4.25 | 1,009 | Academic Writing | Science & Tech. | 33.045986 |
peek-char &optional peek-type input-stream eof-error-p eof-value recursive-p => char
Arguments and Values:
peek-type---a character or t or nil.
input-stream---input stream designator. The default is standard input.
eof-error-p---a generalized boolean. The default is true.
eof-value---an object. The default is nil.
recu... | <urn:uuid:9c42b6b3-b017-4bb0-ad46-58afc251d109> | 3.390625 | 633 | Documentation | Software Dev. | 66.65025 |
MOON rocks were just the start. Now NASA wants to add cometary dust to its collection of celestial rubble. In February 2004 it will send a probe into orbit to capture a little bit of Comet P/Wild-2 and bring it back to Earth.
The probe, called Stardust, will fly within 100 kilometres of the comet. Three times during it... | <urn:uuid:a27f56c3-8af2-4cf4-8aea-8d321151efc1> | 3.890625 | 209 | Truncated | Science & Tech. | 65.841741 |
Termites dominate the insect world in some tropical soils. In the rainforests of West Africa, there can be 10,000 individuals under each square metre. In some soils they can make up 98 per cent of all insect biomass!
Like earthworms in Britain, termites help to maintain the quality and stability of tropical soils. But ... | <urn:uuid:dfb45a0c-d944-4300-a6da-186f26d93e1b> | 3.796875 | 333 | Knowledge Article | Science & Tech. | 40.966005 |
The nuclear physics is the science which not seuleument studies the Atomic nucleus as such (development of an ideal model) but also the way in which it interacts when a particle arrives " with proximité" (the order of magnitude is 1E-12 cm, one usually speaks in nuclear physics about cross Section of which the unit is ... | <urn:uuid:f0aa8ea1-36c9-4aaf-9435-499292088125> | 3.5625 | 2,422 | Knowledge Article | Science & Tech. | 25.600051 |
Narrator: This is Science Today. Seismologists and computer scientists at the Lawrence Livermore National Laboratory used their supercomputers to recreate simulations of the devastating 1906 San Francisco earthquake to measure where the hardest hit areas were. Applied mathematician Anders Petersson describes how these ... | <urn:uuid:f6c566af-5ad6-4e35-a05e-db51ab42bb01> | 4.125 | 226 | Audio Transcript | Science & Tech. | 31.435 |
Brief review of bat research in the San Francisco Bay area and southern California providing land managers with information on the occurrence and status of bat species with links to bat inventories for California and related material.
Maps and text (Word or PDF format) and database (Excel or HTML format) for bedrock, f... | <urn:uuid:7d34488c-64ec-466b-bbd8-3d5babfd5c24> | 3.171875 | 189 | Content Listing | Science & Tech. | 33.748333 |
The Wang Eclipse
Year: 2012 Pages: 4
The Wang eclipse has two bumps in the gravitational curve that have not been explained and therefore are called anomalies. This eclipse happened on March 9 of 1997 and Qien Shen Wang recorded the gravitational acceleration on the surface of the earth during a full eclipse. The resul... | <urn:uuid:b3f740b3-45ef-468e-bdef-ba5074e19614> | 2.96875 | 333 | Comment Section | Science & Tech. | 41.803742 |
See more from this Session: Soil Genesis and Classification: I
A starting point for a USC should come from the most documented existing system. It should have the highest amount and most accurate data collected to support the science. The sharing of additional existing documentation will represent an excellent starting... | <urn:uuid:e5706860-2b47-483f-9325-11c6f4ab60da> | 3.296875 | 239 | Academic Writing | Science & Tech. | 28.184307 |
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.
2013 January 29
Explanation: What would it be like to drive on the Moon? You don't have to guess -- humans have actually done it. Pictured above, Ap... | <urn:uuid:4d2a6ec4-e5e2-4b78-8e44-4fde89fba01a> | 3.75 | 261 | Knowledge Article | Science & Tech. | 42.195815 |
In his comment to How much Estimation is too much Estimation?, Anthony Watts suggested I create a scatter plot showing station distribution with latitude/longitude. It turned out not to be the ordeal I thought it might be, so I have posted some of the results in this thread. I started with 1885 and created a plot every... | <urn:uuid:1fb9eeeb-5fd0-4570-895a-c1982ed39291> | 3 | 969 | Comment Section | Science & Tech. | 59.584655 |
Python source files can now be declared as being in different character set encodings. Encodings are declared by including a specially formatted comment in the first or second line of the source file. For example, a UTF-8 file can be declared with:
#!/usr/bin/env python # -*- coding: UTF-8 -*-
Without such an encoding ... | <urn:uuid:fa6f76e5-4c37-47ec-a408-8455db423d05> | 2.921875 | 202 | Documentation | Software Dev. | 43.021255 |
Comparison of Electrostatic & Gravitational Force
Points of similarity :-
a) Both these are central forces. i.e, they act along the line joining the centres of two interacting bodies.
b) Both the forces obey the inverse square law of distance.
c) Both are conservative forces, i.e, the work done by them does not depend ... | <urn:uuid:39aafa2a-470d-4c3a-a5f9-423387d14880> | 3.40625 | 210 | Personal Blog | Science & Tech. | 40.334124 |
Gets or sets the start point of the line.
Assembly: PresentationCore (in PresentationCore.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation
<object> <object.StartPoint> <Point .../> </object.StartPoint> </object>
Property ValueType:... | <urn:uuid:b67d0bfa-3969-41f1-8382-f58c4a78384f> | 3.390625 | 285 | Documentation | Software Dev. | 52.679286 |
|Annu. Rev. Astron. Astrophys. 1984. 22:
Copyright © 1984 by . All rights reserved
2.4 Stellar Populations
The blue colors of Irrs are generally taken to mean that a proportionally larger component of the stellar population consists of early-type stars (247, 248). This is consistent with the fact that the high surface ... | <urn:uuid:514bf22c-2a7a-4107-ab1f-3da2105baf48> | 2.734375 | 2,070 | Academic Writing | Science & Tech. | 43.318846 |
Both experiments found excesses in the 130-150 GeV mass region. But the excesses did not have enough statistical significance to count as evidence of the Higgs.
Scientists measure statistical significance in units called sigma, written as the Greek letter σ. These high-energy experiments usually require 3σ level of con... | <urn:uuid:8d0e34fd-6511-4a49-ae76-960a5b675243> | 3.15625 | 294 | Personal Blog | Science & Tech. | 45.976695 |
A couple of years ago, while I knew the word "sequestering," I would have been hard pressed to suggest a use for it other than the forced incarceration of juries, to which the word "sequestration" is quaintly applied by our legal profession. Certainly the phrase "carbon sequestration" would've drawn a blank stare from ... | <urn:uuid:15bc1129-9080-4690-bae6-4b14ad0e6cfc> | 2.90625 | 429 | Personal Blog | Science & Tech. | 27.765415 |
I'm making a unit converter just to practice. Currently, I've defined a function to figure out what type of conversion to make (distance, time, mass, etc.).
It then calls the correct converter for the type, asks what you're converting from, what you're converting to, and what the value for conversion is.
def mass_conve... | <urn:uuid:67c0683e-eac6-4eac-a694-8d2d65f462ee> | 2.984375 | 290 | Q&A Forum | Software Dev. | 61.675464 |
A set of change values calculated for all Weather Generator variables for a specified future time period. The change factors are obtained by calculating the difference between the modelled baseline climate and the climate given in the UKCP09 probabilistic projections, for each 25 km grid square.
In order to generate fu... | <urn:uuid:d3b8d73c-4593-40e0-8dc0-f631506b00ac> | 3.15625 | 220 | Knowledge Article | Science & Tech. | 25.159976 |
Comment: 12:56 - 13:54 (00:58)
Source: Annenberg/CPB Resources - Earth Revealed - 5. The Birth of a Theory
Keywords: "Harry H. Hess", "sea floor spreading", "mid-oceanic ridge", Earth, crust, trench, subduction, "Alfred Wegener", data, geopoetry, paleomagnetism
Our transcription: If mid-ocean ridges were continuously c... | <urn:uuid:c47750e3-b434-4e39-b51b-c54b2cc579e8> | 4.03125 | 255 | Knowledge Article | Science & Tech. | 52.669932 |
Given the following data model, design a simple hypertext that allows the user to browse the modeled information.
The site publishes data about music artist and their albums. Each album contains a set of tracks (songs).
The hypertext should provide a home page which shows the list of all the artists. The list is paged,... | <urn:uuid:ae54ab26-928e-4fc3-be4d-1fa7636c31ca> | 2.84375 | 120 | Documentation | Software Dev. | 57.584433 |
A radio altimeter could be used to index the height at which each picture was taken. The camera system, developed by the Eastman Kodak Company for the Air Force, would be available within the year. The alternative approach of using direct television appeared less attractive because the resolution of the television syst... | <urn:uuid:8ba05dbd-1c79-41b9-84fe-ffd29a8d0c4f> | 3.578125 | 174 | Knowledge Article | Science & Tech. | 22.330296 |
A list of numbers that follows a rule is called a sequence. Sequences whose rule is the multiplication of a constant are called geometric sequences, similar to arithmetic sequences that follow a rule of addition. Homework problems on geometric sequences often ask us to find the nth term of a sequence using a formula. G... | <urn:uuid:8b2d4637-a7fd-4ef0-8132-a42022142be7> | 3.984375 | 537 | Tutorial | Science & Tech. | 76.519306 |
Unlike other sea birds, the four-feet tall Emperor penguins breed and raise their young almost exclusively on sea ice.
If that ice breaks up and disappears early in the breeding season, massive breeding failure may occur, said the researchers from Woods Hole Oceanographic Institution (WHOI).
"Over the last century, we ... | <urn:uuid:2c2fec87-96cf-4b0c-b8be-f17818c4d392> | 3.8125 | 369 | Truncated | Science & Tech. | 31.327985 |
It’s difficult to conceive of just how large the hot gas halo is, but NASA notes it could extend more than 300,000 light years out from its center, and have a mass equivalent between 10 billion suns and 60 billion suns, or just as many or more than all of the stars in the Milky Way itself, at a temperature “a few hundr... | <urn:uuid:e5c93886-7c48-4adc-b5c1-8b0681a289de> | 3.734375 | 343 | Truncated | Science & Tech. | 41.381618 |
Image credit: NASA; image source
The Top of the Atmosphere
In this NASA image (high-res version) captured from the International Space Station (ISS), the top of the blue band marks what is often called the edge of Earth's atmosphere, about 100 km up. Note the moon, faintly visible in the left-center. To learn more, vis... | <urn:uuid:8cc707c6-dcd6-465c-a512-a8b56fe14479> | 3.671875 | 215 | Knowledge Article | Science & Tech. | 51.369325 |
- Agronomic trait - A characteristic in a plant or animal that will add economic value to agricultural production. For example, increasing the protein content in dairy cow milk means the milk would be worth more to the farmer.
- Bacteria - Single celled organisms capable of reproduction and growth. Bacteria can be bene... | <urn:uuid:b40fef61-4b42-49c5-be49-815cd5b518c8> | 3.46875 | 1,055 | Structured Data | Science & Tech. | 27.309091 |
http://www.fairewinds.com/content/fukus ... and-future
"Here is what would happen if Unit 4 were to crack and the water were to drain out of the nuclear fuel pool. The fuel is hot enough that it needs to be water-cooled. If air is all there is cooling the fuel, it will burn. It will burn the zircaloy cladding on the fu... | <urn:uuid:15053e72-cc73-4473-9579-698ed29f1b50> | 2.734375 | 544 | Comment Section | Science & Tech. | 82.317958 |