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cp ~bfarr/Surf_start.mws ~
You can copy the worksheet now, but you should read through the lab before you load it into Maple. Once you have read to the exercises, start up Maple, load the worksheet Surf_start.mws, and go through it carefully. Then you can start working on the exercises.
One of the most valuable service... | <urn:uuid:881aedb6-3cef-4434-aa08-16a37fcdb565> | 4.0625 | 407 | Tutorial | Science & Tech. | 50.303732 |
Lepisorus clathratus is a polypod fern and belongs to the Polypodiaceae family.
It is usually found growing on rocks, mainly in the Sino-Himalayan region at altitudes from approximately 2,000 to 5,000 metres above sea level.
This species has an unusual behaviour for a fern - it sheds its leaves during winter leaving th... | <urn:uuid:df015fc0-6272-4766-abc3-568b425aa09a> | 3.203125 | 415 | Knowledge Article | Science & Tech. | 43.862673 |
by Staff Writers
Paris (ESA) Jul 27, 2011
Observing Saturn, Herschel has detected evidence of water molecules in a huge torus surrounding the planet and centred on the orbit of its small moon, Enceladus. The water plumes on Enceladus, which were detected by the Cassini-Huygens mission, inject the water into the torus a... | <urn:uuid:c54b11d0-1e4a-45c0-9cc7-944a9e09721b> | 3.125 | 1,592 | Truncated | Science & Tech. | 30.029759 |
Zamia furfuracea, Photo: Michael Lahanas
Zamia furfuracea L.f. in Aiton
* Hortus Kew. 3: 477 (1789).
Zamia furfuracea is a cycad native to southeastern Veracruz state in eastern Mexico. Although not a palm tree (Arecaceae), its growth habit is superficially similar to a palm; therefore it is commonly known as "Cardboar... | <urn:uuid:4c8aa142-ab2a-4bcc-aad4-fee4c2a89b2c> | 2.6875 | 729 | Knowledge Article | Science & Tech. | 55.664512 |
COURTESY OF CITIZEN SKY
Since the early 19th century, astronomers have observed this extremely long-period eclipsing binary located in the constellation Auriga, the charioteer. In 1928, astronomer Harlow Shapley correctly concluded that the two stars were about equal in mass. Based on this information they should be ab... | <urn:uuid:aedac95c-bd6b-4461-988f-cf62a6f6b150> | 3.8125 | 273 | Knowledge Article | Science & Tech. | 31.1675 |
The Orion Nebula - A stellar nursery
Click on image for full size
HII Regions - Stellar Nurseries
Hidden in the sword of Orion the hunter, a weapon and symbol of death,
lies the birthplace of new stars - the stunning Orion Nebula, one of
the many objects catalogued by Charles Messier in the 18th century
during his hunt... | <urn:uuid:255d36e3-5c33-4923-97f5-ee0301e7cba3> | 3.578125 | 693 | Content Listing | Science & Tech. | 58.932563 |
Gas Chromatography is common type of chromatography which is used to analyze or separate volatile components of a mixture. This technique helps us to test the purity of a particular substance or separate different components of a structure. Basically, the mechanism of this technique is carried out by injecting syringe ... | <urn:uuid:b8430c6e-3dca-4d1e-ac0f-f2efa34debad> | 3.53125 | 1,025 | Tutorial | Science & Tech. | 44.435 |
Family: Talpidae, Moles view all from this family
Description Tail is longer and less hairy than other moles in its range. Foretoes have webbing between them, hence the name “aquaticus.” Although they can swim, they are not aquatic. Three upper and lower premolars on each side. No external ears, and the eyes are comple... | <urn:uuid:53a6be69-29a2-48b9-9f3d-136ef0fc4109> | 3.203125 | 280 | Knowledge Article | Science & Tech. | 48.002383 |
When a USGS colleague wandered into geology professor LeeAnn Munk’s UAA office one day and asked, “What do you know about lithium?” she had to honestly answer, “Not much.”
But that was just the question to launch a curious researcher like Munk, already interested in all things related to the geochemistry of ore deposit... | <urn:uuid:3a176cc2-79a2-432b-a16d-4f574c0dd1c3> | 3.703125 | 1,382 | Knowledge Article | Science & Tech. | 43.760719 |
Delphi Win32 -Building Database Application - P6 In this video, we will start discussion about SQL, specifically we will talking about query data with SQL.
We will learn about query data with very simple SQL command with basic query statement.
Delphi Win32 -Building Database Application - P5 There are many searching me... | <urn:uuid:990d2288-9752-470d-8a01-30f2ae245c06> | 2.75 | 792 | Content Listing | Software Dev. | 32.623284 |
I'm revising for my exam and there's this one problem where I can't get the correct answer, so I'd like to know how to solve it. The problem is:
Two boys, each with a mass of 30kg, are sitting on the ends of a horizontal girder which is 2.5m long and has a mass of 15 kg. The girder rotates at 7 turns/minute around a ve... | <urn:uuid:5237f5a7-1b23-4412-8d81-959fa89ea6c4> | 2.875 | 146 | Q&A Forum | Science & Tech. | 85.074118 |
A model of the geodynamics between the reversals of Earth’s magnetic field.
Image courtesy of G.A. Glatzmaier/Los Alamos National Lab (via Wikimedia Commons)
A supercomputer simulation shows magnetic field lines continuously generated and distorted by the Earth's liquid metal core. Partially mimicking this process, a r... | <urn:uuid:f4230bfc-18f1-4a7c-bf22-f9b17a594dcc> | 3.15625 | 98 | Truncated | Science & Tech. | 37.520592 |
Microscopic plants, using volcanic ash for dating
24 April 2012
This week in the Planet Earth Podcast: we take a closer look at tiny marine plants, which underpin the entire marine food chain and play a vital role in the Earth's climate. Also, how scientists are using volcanic ash called tefra to tell how people may ha... | <urn:uuid:60f21c28-ded8-48d3-8263-d43a3f7c5f26> | 3.21875 | 408 | Truncated | Science & Tech. | 54.793246 |
In this second excerpt from my book Out of Nature: Why Drugs From Plants Matter to the Future of Humanity (University of Arizona Press, 2012), I have selected a passage from chapter 8, which discusses the importance of economic and public investment in biodiversity conservation. Part 1 of this series can be viewed here... | <urn:uuid:2d4d0caa-a62f-4f52-895b-565851628902> | 2.90625 | 872 | Truncated | Science & Tech. | 25.16819 |
NO and NO are also closely related, interconverting in the daytime in a time scale of a few minutes. The concentration of NO+NO (denoted NOx) controls the oxidative reaction chemistry as shown in the following reaction sequences, which describe the effect of hydrocarbon oxidation in atmospheres of high, low, and very l... | <urn:uuid:b180aa0d-7451-4301-ab1f-9929b0af31bd> | 3.359375 | 3,766 | Knowledge Article | Science & Tech. | 55.18332 |
atomic nucleus is built from two major kinds of particles: protons
and neutrons. A proton carries one unit of positive charge, which
balances the negative charge on an electron. The neutron is uncharged.
The standard unit for measuring masses of atoms is the atomic
mass unit (amu) defined such that the most common kind... | <urn:uuid:15732217-6f6b-466e-b42d-03d015bdc5b0> | 4.4375 | 185 | Knowledge Article | Science & Tech. | 58.731649 |
Hi, I have a very basic question. We cannot create instance of an abstract class. e.g. Calendar class of util pkg is ab abstract class. so if we try to create an instace of this using new operator, it gives error. However, we can call getInstance() method to get an instance of Calendar class. Can anyone explain me, wha... | <urn:uuid:f17a3492-0c3d-4ea6-91ff-fb82a53cd833> | 2.859375 | 181 | Q&A Forum | Software Dev. | 56.547949 |
The Gesellschaft für Schwerionenforschung mbH (GSI), or Association for Heavy Ion Research, is a research facility where scientific researchers work with heavy ions for a wide range of experiments to explore the structure of matter. GSI is a particle accelerator facility where ions are accelerated up to 90% the speed o... | <urn:uuid:97b45c15-ff39-4d47-b4c1-10e9af4b6ee8> | 3.390625 | 596 | Knowledge Article | Science & Tech. | 38.661522 |
||It has been suggested that this article be merged into Ridge regression. (Discuss) Proposed since November 2012.|
In statistics, Bayesian linear regression is an approach to linear regression in which the statistical analysis is undertaken within the context of Bayesian inference. When the regression model has errors... | <urn:uuid:6552aa5e-02ef-4e7e-a871-db947331951e> | 2.84375 | 1,479 | Knowledge Article | Science & Tech. | 43.086571 |
Barny Wiggin, former Meteorologist-In-Charge at the NWS Office in Buffalo
was once quoted as saying that the weather often "clears up stormy" to
the lee of the Great Lakes during the winter. In particular, long after
the passage of cold fronts across the region, the relatively warm waters
of the Great Lakes often creat... | <urn:uuid:78a33f15-3a75-4dd9-845f-4abf39b369a5> | 3.671875 | 554 | Knowledge Article | Science & Tech. | 47.130953 |
Tweaking the PATH environment variable setting for Python (Windows)
Usually, you will use the Python Shell from within Idle or and IDE, but you sometimes you may need to be able to run python within a terminal shell, e.g. to run setup.py for installing certain python modules. You may think that installing your Python s... | <urn:uuid:25968ff3-dd38-4e11-a974-5e5c30d9376a> | 2.859375 | 474 | Tutorial | Software Dev. | 77.011109 |
|Darkfield photograph of a gastrotrich|
The gastrotrichs (from Greek γαστήρ, gaster ["stomach"], and θρίξ, thrix ["hair"]), often called hairy backs, are a phylum of microscopic (0.06-3.0 mm), pseudocoelomate animals abundant in fresh water and marine environments. Most fresh water species are part of the periphyton an... | <urn:uuid:eea17036-e53e-40cc-9c3a-31a113f6f331> | 3.734375 | 1,004 | Knowledge Article | Science & Tech. | 30.99491 |
The answer isn't in space. It isn't on the ground, or in between. The answer to determining air quality is a combination of all of those things, Jim Crawford told a January Colloquium audience Tuesday.
For more than 30 years, researchers at NASA's Langley Research Center have been measuring the stratospheric ozone laye... | <urn:uuid:4ef89407-7028-4859-bad3-51f8a9f3d44d> | 3.15625 | 351 | Content Listing | Science & Tech. | 51.564853 |
Because of the strong ozone absorption, any photons with wavelengths shorter than 280 nm at ground level are most likely due to human activity (or lightning). This is just as well since these short wavelength photons have enough energy to break many chemical bonds. We have found many uses for this bond breaking capabil... | <urn:uuid:be696e7d-bdfa-4f43-b56d-09afdaf23a4c> | 3.046875 | 3,302 | Academic Writing | Science & Tech. | 43.00272 |
SOME genetically modified fish are like ferocious tigers in a bare tank but appear to be pussy cats under more natural conditions. This finding suggests it will not be easy for biologists to predict the ecological consequences of escaped transgenic animals.
Salmon genetically engineered to overproduce growth hormone ca... | <urn:uuid:2c5f40e9-e2b0-4344-9af9-b2a048ffe3ba> | 3.28125 | 208 | Truncated | Science & Tech. | 33.141658 |
|Feb12-12, 06:09 PM||#1|
what is electricity???
For a long time i thought that electricity was just electron moving in a coil from negative to positive terminals. and thats what my teachers have taught me too...
But i recently stumbled upon something called electricity through induction which has led me to doubt the ab... | <urn:uuid:c5972a68-e991-4d24-9400-2dc186b7bae5> | 3.421875 | 557 | Comment Section | Science & Tech. | 50.750667 |
Okay, I will undoubtedly be overstepping my bounds as far as my knowledge of this goes, so if I say anything utterly false please don't be afraid to correct me.
So atoms are the smallest measurable unit of matter. Earth and the atmosphere, having it's theoretical limits separating the atmosphere from the rest of space,... | <urn:uuid:0fd5baa5-3a06-4810-a220-8d233f9cede4> | 3.453125 | 456 | Q&A Forum | Science & Tech. | 42.457735 |
Revista chilena de historia natural
versión impresa ISSN 0716-078X
SABAT, PABLO; NESPOLO, ROBERTO F y BOZINOVIC, FRANCISCO. Water economy of three Cinclodes (Furnariidae) species inhabiting marine and freshwater ecosystems. Rev. chil. hist. nat. [online]. 2004, vol.77, n.2, pp. 219-225. ISSN 0716-078X. doi: 10.4067/S07... | <urn:uuid:044d2631-e73b-43f9-bcca-3b87e3cac3fe> | 2.953125 | 385 | Academic Writing | Science & Tech. | 32.411016 |
Ground shaking caused by the sudden release of accumulated strain by an abrupt shift of rock along a fracture in the earth or by volcanic or magmatic activity, or other sudden stress changes in the earth.
Information on earthquake activity, earthquake science, and earthquake hazard reduction with links to news reports,... | <urn:uuid:5f142c0d-64b5-4c6c-914a-e346f42a1192> | 3.140625 | 156 | Knowledge Article | Science & Tech. | 25.6012 |
C Programming: What is the difference between an array and a pointer?
Why is a raven like a writing-desk? (Lewis Carroll)
This is a copy of an article I wrote a long time ago. I'm putting it here to give it a more permanent home. Sorry for being off topic again!
I'm glad you asked. The answer is surprisingly simple: al... | <urn:uuid:452f33eb-cbab-4254-b286-bd704a9b8177> | 3.65625 | 1,030 | Documentation | Software Dev. | 59.93331 |
Benthic foraminifera: their importance to future reef island resilience
Dawson, John L., Hua, Quan, and Smithers, Scott G. (2012) Benthic foraminifera: their importance to future reef island resilience. Proceedings of the 12th International Coral Reef Symposium. 12th International Coral Reef Symposium , 9-13 July 2012,... | <urn:uuid:151442d2-0b2e-4879-a592-40a47f3a9ab7> | 2.84375 | 419 | Academic Writing | Science & Tech. | 35.756547 |
Abraham de Moivre, (a good friend of Issac Newton) was born on May 16th 1667 in Vitry (close to Paris), France and died November 27th 1754 in London, England. Although De Moivre attended college and studied privately, it doesn't appear that he received a degree. He apparently served time in prison for about a year for ... | <urn:uuid:e1778e98-e51e-47bc-afb4-a2300df001cf> | 3.25 | 348 | Knowledge Article | Science & Tech. | 44.125545 |
For a general description of the launch see this ESA web page.
Because the instruments on PROBA2 are expected to monitor solar conditions around the clock, PROBA2 follows a sun-synchronous orbit. This means that PROBA2’s orbit will track the terminator, following the dividing line between day and night on earth over th... | <urn:uuid:9c5643b7-bd8a-433e-8b9f-ca37ec19d314> | 3.484375 | 490 | Knowledge Article | Science & Tech. | 38.859991 |
INTRO: Spotted seals and harbor seals look so much alike that when it comes to telling them apart, even biologists end up scratching their heads. In places like Bristol Bay, where the two species coexist, scientists are turning to DNA for answers. As Doug Schneider reports in this week's Arctic Science Journeys Radio, ... | <urn:uuid:a5055c4c-d083-4f1d-afac-10ac103f1067> | 3.84375 | 1,057 | Audio Transcript | Science & Tech. | 62.690926 |
Scientific cosmology is the study of the entire universe, its origin, evolution, composition, and structure. Cosmology is today in the midst of a golden age, during which the basic story of the evolution of the universe is coming into clear focus. But this recent progress rests on foundations laid in the late nineteent... | <urn:uuid:db8a5d58-2040-49e1-9931-b99d1d3d76e9> | 3.984375 | 2,711 | Knowledge Article | Science & Tech. | 36.301664 |
In this classic paper on landscape-scale disturbance, Sprugel questions the simplistic notion of climax generally accepted in the 50's and 60's. In his introduction Sprugel says: "ecologists spent much time and effort searching for, describing, and classifying 'climax' ecosystems even though there was often little or n... | <urn:uuid:db21d084-51d2-4735-bdc7-71e157133b76> | 3.15625 | 613 | Academic Writing | Science & Tech. | 42.286017 |
In order to process an XSL stylesheet, a stylesheet processor accepts data in XML and an XSL stylesheet to define the presentation of that XML. But there are two parts of the presentation:
- Construction of a final document, called a results tree - defining how the document will be used, for instance in print, on the W... | <urn:uuid:d6487933-c22c-416b-b914-8228b19688f7> | 2.96875 | 614 | Documentation | Software Dev. | 66.412734 |
In probability theory
Probability theory is the branch of mathematics concerned with analysis of random phenomena. The central objects of probability theory are random variables, stochastic processes, and events: mathematical abstractions of non-deterministic events or measured quantities that may either be single...
,... | <urn:uuid:b70382e8-0156-437b-8f81-d18e757f839f> | 3.5 | 1,057 | Content Listing | Science & Tech. | 30.339833 |
Onto Land and Back: Dr. Maureen O'Leary Studies Whale Evolution
Why study whales?
Consider these enormous, intelligent animals. They're mammals, but they abandoned dry land over 50 million years ago to recolonize the sea. And they look nothing like the land ancestors they left behind. "They've lost their hair, they've ... | <urn:uuid:eb6db8d7-7ad1-4748-b8a9-984bea9ebf8d> | 4.15625 | 2,458 | Knowledge Article | Science & Tech. | 34.78375 |
and carbon dioxide levels
In order to carry on photosynthesis, green plants need a supply of carbon
dioxide and a means of disposing of oxygen. In order to carry
on cellular respiration, plant cells need oxygen and a means of
disposing of carbon dioxide (just as animal cells do).
Unlike animals, plants have no speciali... | <urn:uuid:aad6b8e9-0974-426b-9775-b50be425ae66> | 3.671875 | 1,781 | Knowledge Article | Science & Tech. | 45.909251 |
|Fertilized Eggs||Antarctic Sea Urchin|
|Tracy is looking to collect urchins in a shallow area. The distance between the sea ice and the bottom is only five feet here.|
|Seals like to hang out around the dive holes to use them for breathing. The primary reason for drilling several safety holes while diving is so in cas... | <urn:uuid:97fad40a-f643-4a13-9712-3f18129bfd5f> | 3.515625 | 831 | Knowledge Article | Science & Tech. | 49.815035 |
your extensive knowledge and understanding of data to make a prediction
of where to find the fish. collect data to make a prediction!
Link to the
Print out as many copies of the
Fisherman's Log as you will need for the activity. Each copy
allows you to record data for 4 days.
- For each day that you collect data, color... | <urn:uuid:23646257-9db0-4d9d-88f6-8717887da983> | 2.984375 | 219 | Tutorial | Science & Tech. | 58.859028 |
Archived:Basic PySymbian app - series2
The first article in this series was very important because it focused mainly on how to guide your application by using a proper architecture. In that article there were the basic things to consider when building a PySymbian application.
Now it is time to go more technical and lea... | <urn:uuid:915ee4ba-7448-4b3a-99aa-1afecf2f7301> | 2.828125 | 519 | Tutorial | Software Dev. | 45.269699 |
Climate Change and Giant Sequoias
The world’s largest living species, native to California's Sierra Nevada, faces a two-pronged risk from declining snowpack and rising temperatures. The threat to sequoias mirrors a growing danger to trees worldwide, with some scientists saying rapid warming this century could wipe out ... | <urn:uuid:b89274d2-f22c-495a-85ed-69c30e2d40cf> | 3.984375 | 414 | Truncated | Science & Tech. | 47.646643 |
Jet Propulsion Laboratory
NASA's leading space science lab started by a co-founder with deep ties to the occult
Located in Pasadena, California, Jet Propulsion Laboratory (JPL) is best known for its groundbreaking technology and research in the fields of astronomy and physics. As a branch of NASA, it has been responsib... | <urn:uuid:3c5f3bee-5923-4e7e-9d4d-b1e665b79872> | 3.1875 | 818 | Comment Section | Science & Tech. | 35.877007 |
Report an inappropriate comment
Wings Don't Generate Lift Through Pressure Differences
Wed Dec 08 16:47:37 GMT 2010 by Maggie McKee
Thank you for your comment. It's true that the shape of the wing is not the only factor that keeps airplanes aloft, so I have tweaked the text to read: "Wings, whether bird or Boeing, soar... | <urn:uuid:ac4eb4a6-c908-46b2-b321-b9f534f418a0> | 3.125 | 152 | Comment Section | Science & Tech. | 54.610323 |
Writing VBA code for Microsoft Outlook
Visual Basic for Applications (VBA) is one of two programming languages available for writing code in Outlook. (The other is VBScript, which is used by Microsoft Outlook custom forms. You can also automate Outlook using VBA in other Outlook applications. Even developers who progra... | <urn:uuid:d287780d-2356-4a08-8fd8-97ffbf090781> | 2.921875 | 1,203 | Tutorial | Software Dev. | 40.39312 |
On December 14, 1911, Norwegian explorer Roald Amundsen's five-man expedition arrived at the South Pole on skis and dogsleds, beating Robert F. Scott's ill-fated team by a month. Amundsen, who left medical school at age 21 for a life at sea, was also the first person to cross the North Pole by airship and the first to ... | <urn:uuid:96f70255-5b53-4799-92c1-1e92d2c4e48d> | 2.984375 | 228 | Truncated | Science & Tech. | 51.787759 |
The data from the seven participants were unambiguous. Paying attention to the target consistently and strongly increased the fMRI activity, regardless of whether the subject saw the target or not. This result was expected because many previous studies had shown that attending to a signal reinforces its representation ... | <urn:uuid:38806541-7c29-4790-82a1-7e6138e179e1> | 2.984375 | 407 | Truncated | Science & Tech. | 32.255245 |
There are three steps to solving a math problem.
- Figure out what the problem is asking.
- Solve the problem.
- If you get stuck, figure out why you're stuck.
- Check the answer.
What does the Mean Value Theorem say about the function...Please purchase the full module to see the rest of this course | <urn:uuid:9603016f-89f6-4e99-b80a-34febd162ee5> | 3.125 | 72 | Tutorial | Science & Tech. | 79.350417 |
When I tell people that I spend my days testing the possibility of life on Mars they usually reply in one of two ways. 'No seriously, what do you do?' is only slightly more common than the wittier 'So you're not holding out for much fieldwork, then?' Astrobiology is a bright young discipline, aiming to answer some of t... | <urn:uuid:a8ad1de9-cc5d-41ae-b5bd-693457e5ec1e> | 3.515625 | 815 | Personal Blog | Science & Tech. | 43.004091 |
|Launched in 1999, Stardust will collect material from a comet and return it to Earth. Scheduled to intercept comet Wild-2 in 2004, the spacecraft will obtain samples using an extremely light, silicon-based solid called aerogel. The samples will be returned to Earth in 2006.|
Image courtesy of NASA/Jet Propulsion Labor... | <urn:uuid:4402b429-f398-47cd-a1c0-1aeb65b52b3a> | 3.578125 | 145 | Knowledge Article | Science & Tech. | 46.636548 |
Why do Marine animals have fins.
It is more efficient to use fins than feet, hooves, or other similar body parts. It is the same reason that you can swim faster while wearing flippers. Having a larger surface area allows animals to push against more water, so that they have more force when swimming. Here is a picture o... | <urn:uuid:2667b4c1-c94e-49c7-99d0-0cfdafa196ef> | 3.59375 | 170 | Q&A Forum | Science & Tech. | 49.347378 |
Found 0 - 10 results of 14 programs matching keyword " wind"
Southeast of San Francisco, on the way out to California's Central Valley, thousands of wind turbines dot the landscape of Altamont Pass. Mounted both in rows and individually, machines with large propellers catch the wind, turning round and round at differen... | <urn:uuid:2172781d-911d-4ea7-b6d1-bf9f82a50d32> | 3.046875 | 643 | Content Listing | Science & Tech. | 49.2005 |
Many climate scientists felt the conclusions on effects of global warming in the 2007 IPCC review were too conservative. One reason was the estimation of likely melting of ice sheets and its effects.
Problem was that there was insufficient knowledge to draw definite conclusions. And the measurements of changes in ice s... | <urn:uuid:a1358e60-9e42-4cbb-8e67-d7be0ce661c3> | 3.5625 | 735 | Personal Blog | Science & Tech. | 38.035205 |
In February, Asteroid 2012 DA 14 will come so close to earth that it will be nearer to our planet than many satellites are. This asteroid, which really should get a new name, is about half the size of a football field. Its orbit is similar to that of the Earth itself, in size and shape, but at an angle to the Earth’s p... | <urn:uuid:51990608-c4fe-4924-952d-8fc9a379d3b4> | 3.140625 | 286 | Personal Blog | Science & Tech. | 59.427797 |
When you go outside at night, on a clear night away from all lights, you see the sky the same way the ancients did: full of stars.
Now, if you looked up periodically, you would find that the sky appears to rotate! Some constellations rise while others set, and one point — either due north or due south depending on your... | <urn:uuid:5ca37d5e-7606-4085-a994-61cae6aa14df> | 3.9375 | 492 | Personal Blog | Science & Tech. | 55.319624 |
Milky Way's Luminous Halo
|Home | X-Objects | Stars | Habitability | Life ||
The Milky Way's spiral disk is
surrounded by a luminous halo
of older Population II stars and
stellar remnants, which recently
has been found to be composed
of two nested components rotating
in opposing directions (more).
The Luminous Halo
Lar... | <urn:uuid:cca3a84f-cab9-4e08-8174-897b3a38ee78> | 3.9375 | 1,191 | Knowledge Article | Science & Tech. | 35.959353 |
Learn more physics!
Ive searched on-line, and many sources have gotten the same answer as my science experiment, but they have not answered WHY. So, my question is WHY does extra co2 help plants reproduce better? I found that it does, but WHY??
Plants need CO2
as the source of carbon for photosynthesis, the process by ... | <urn:uuid:7b5a0e2d-02bc-4d05-adc5-0384bc2e78fa> | 3.1875 | 148 | Q&A Forum | Science & Tech. | 70.084234 |
Steel Ball Dropped in a Viscous Fluid
Five steel balls of different sizes are dropped into corn syrup. The balls reach a constant velocity shortly after entering the fluid. The velocity is constrained due to the drag balancing the force of gravity in the fluid. This demonstrates the relationship between the size of the... | <urn:uuid:ab1640ca-3947-4f88-bda8-d58c4be21031> | 3.109375 | 71 | Truncated | Science & Tech. | 49.192823 |
Sean Beatty explains what a deadlock is and why testing probably won't catch it.
Most software development projects rely upon some combination of inspection, structural testing, and functional testing to identify software defects. While testing is invaluable and does uncover the vast majority of software problems, some... | <urn:uuid:6b9a86cb-7432-46e8-a5e1-3a4b23d6d00d> | 3.453125 | 725 | Tutorial | Software Dev. | 49.315455 |
Return to Vignettes of Ancient Mathematics
Introduction to Hippocrates
Introduction to Lunules
Comparison of Alexander's and Eudemus' Methods
(diagram 1) The basic idea is to construct an outer arc A and an inner arc B, concave in the same direction. (diagram 2) Suppose (condition 1 of 2) that we have constructed the a... | <urn:uuid:bcbbca22-0929-4e27-8716-274efa7fa059> | 3.796875 | 1,181 | Academic Writing | Science & Tech. | 63.600636 |
As a starting point, we chose to focus on development of ribosomal RNA (rRNA) targeted probes as tools for identifying and estimating the abundance of a variety of marine organisms, and to devise methods for applying those probes in a fashion consistent with their use outside of a conventional laboratory. This effort i... | <urn:uuid:dca12e67-12aa-4379-93ab-073bb3066971> | 3.09375 | 1,086 | Academic Writing | Science & Tech. | 29.281995 |
The Natural History Museum is home to several specimens of Parides agavus collected in Brazil, Paraguay and Argentina.
This beautiful butterfly prefers to live in areas of dense vegetation with little light, where the caterpillars feed on plants from the family Aristolochiaceae.
Many plants from this family contain ari... | <urn:uuid:c4c083da-8f88-498c-bae4-03e87f7507c0> | 4 | 432 | Knowledge Article | Science & Tech. | 25.458671 |
Saturday, July 28, 2012
Check it out here. This simple site lets you input a value into a size or distance, which it then uses to scale to other well-known bodies throughout the universe, including the universe itself.
Here are some quick examples of the quick use one can find with it:
First take Venus. It has a diamet... | <urn:uuid:9d873e3f-55fb-41ee-bcf0-0e337ae749d2> | 3.46875 | 273 | Personal Blog | Science & Tech. | 73.501 |
I think that the best solution is for authors to spend more time, and use more words, outlining the details of their mathematical equations. It is important to explain how equations are derived and how the scientific implications of the mathematics are employed. You cannot simply cram a paper with equations.
Dr Tim Faw... | <urn:uuid:1af531e8-ab60-4fa7-9366-333f56d39c36> | 2.921875 | 925 | Audio Transcript | Science & Tech. | 37.858006 |
July was hottest month in 100-plus years of U.S. records
Explore This Story
WASHINGTON — This probably comes as no surprise: U.S. scientists say July was the hottest month ever recorded in the lower 48 states, breaking a record set during the Dust Bowl of the 1930s. They say climate change is a factor.
The average temp... | <urn:uuid:34525966-a99a-43bc-adda-4e7daac9045c> | 3.5 | 699 | Truncated | Science & Tech. | 61.822471 |
Author(s): G. Li & M. F. Modest
Traditional modeling of radiative transfer in reacting flows has ignored the interactions
between turbulence and radiation (TRI).
Evaluation of radiative fluxes, divergences
of flux and radiative properties have been based on mean temperature and
However, both experimental and theoretica... | <urn:uuid:cfb01f5b-dc4a-4db0-a522-c3dc0ed1b199> | 2.75 | 407 | Truncated | Science & Tech. | 27.005032 |
See also the
Dr. Math FAQ:
Browse High School Sequences, Series
Stars indicate particularly interesting answers or
good places to begin browsing.
Selected answers to common questions:
Strategies for finding sequences.
- Second-Order Linear Recurrences [06/08/2001]
Three problems involving recurrence equations.
- Second... | <urn:uuid:f90288e5-3b7d-4bb2-ae8a-2b884a1e7fda> | 2.984375 | 1,888 | Q&A Forum | Science & Tech. | 98.9811 |
Ice melt found across 97 percent of Greenland, satellites show
Three satellites found that 97 percent of Greenland -- the land mass second only to Antarctica for its volume of ice -- underwent a thaw never before seen in 33 years of satellite tracking, NASA reported Tuesday.
Satellite experts at first didn't trust thei... | <urn:uuid:87f05965-180a-4ec9-b72d-d96ef4f780db> | 3.265625 | 304 | Comment Section | Science & Tech. | 57.433762 |
National-scale analyses of habitat associations of Marsh Tit Poecile palustris and Blue Tits Cyanistes caeruleus: two species with opposing population trends in Britain
Carpenter, Jane; Smart, Jennifer; Amar, Arjun; Gosler, Andrew; Hinsley, Shelley; Charman, Elizabeth. 2010 National-scale analyses of habitat associatio... | <urn:uuid:f2714b33-37a7-4617-8528-381a050da89c> | 2.734375 | 448 | Academic Writing | Science & Tech. | 23.993665 |
Reallocation of compensation releases to restore river flows and improve instream habitat availability in the Upper Derwent Catchment, Derbyshire, UK
Article first published online: 28 SEP 2001
Copyright © 2001 John Wiley & Sons, Ltd.
Regulated Rivers: Research & Management
Special Issue: Eighth International Symposium... | <urn:uuid:a240e684-c968-4141-bae3-0d182c53689e> | 2.71875 | 724 | Academic Writing | Science & Tech. | 29.190298 |
The New York Times has taken notice of the history and philosophy of chemistry in a small piece about a new book, The Periodic Table: Its Story and Significance by Eric R. Scerri. In particular, the Times piece notes the issue of whether Dimitri Ivanovich Mendeleev was “borrowing” from the work of others (without ackno... | <urn:uuid:c2e46275-c6c8-4959-b2e4-12191ab18cb9> | 2.796875 | 620 | Personal Blog | Science & Tech. | 38.097028 |
How Tidal works?
When water levels are high in oceans and tides are producing and rushing to and fro, it has potential to produce electricity out of it.† For producing electricity out of such wild potential oceans barrage is installed around the corner of river, then water turbines are installed inside the barrage. Whe... | <urn:uuid:8f89c698-8733-435e-9bb3-de223b3f10e2> | 4.09375 | 1,312 | Knowledge Article | Science & Tech. | 32.592415 |
If you've ever read the book The Physics of Star Trek by Lawrence M Krauss (and if you haven't, you should!), you already know that in 1994 physicist Miguel Alcubierre proved that a Star Trek-like warp drive was theoretically possible, but would require an insane amount of energy. Interesting, but not altogether useful... | <urn:uuid:da074a14-e5cc-4b77-a838-c759fbf1928d> | 3.4375 | 1,034 | Personal Blog | Science & Tech. | 40.081839 |
What is Biodiversity?
Definition: Biodiversity or Biological diversity is simply the variety of life -
all life in all forms.
Biodiversity includes all plants, animals and microorganisms, their genetic material, the variety of species, and the ecosystems of which they are part.
It is this variation that allows plants a... | <urn:uuid:98a059f1-c302-4063-95de-b1b268c174db> | 3.4375 | 129 | Knowledge Article | Science & Tech. | 20.330796 |
The trouble with aposematism, though, is that it requires giving up another, more common defensive color scheme: camouflage. If you're a poisonous critter, and you evolve bright coloration for the first time, predators don't yet know that you're poisonous - but you're really brightly colored and easy to see. How, then,... | <urn:uuid:639cf911-3b9f-4dfd-b0c0-9f485bd4a940> | 3.953125 | 731 | Personal Blog | Science & Tech. | 54.279549 |
After the conclusion of space shuttle Atlantis's final mission, NASA will roll the shuttle fleet into retirement, also grounding US-backed human space travel for the foreseeable future. Since the US does not have a ready replacement to send crews into space, US astronauts en route to the International Space Station wil... | <urn:uuid:9f689778-74f0-4e84-9528-5e18aea8cdc5> | 3.59375 | 322 | Content Listing | Science & Tech. | 25.832857 |
The angles in triangle ABC satisfy 6sin∠A=3√3sin∠B=2√2sin∠C. If sin2∠A=a/b, where a and b are coprime positive integers, what is the value of a+b?
ABCD is a parallelogram. Let C′ be a point on AC extended such that the length of AC′=1.2AC. Let D′ be on the segment BD such that the length of BD′=0.9BD. The ratio of the ... | <urn:uuid:8a89f3c2-d63f-485e-9209-be3d64baf8f8> | 2.84375 | 330 | Content Listing | Science & Tech. | 90.436576 |
Why doesn't our summer weather usually begin until after July 4th...instead of near the Solstice?
The answer is related to our northerly latitude and our coastal location...on the west coast! The Pacific High which blocks incoming disturbances and typically brings a drier northerly flow takes time to build northward. T... | <urn:uuid:aec3885a-f5e3-4e7c-a2ec-4a004a125881> | 3.203125 | 168 | Q&A Forum | Science & Tech. | 58.93308 |
The Earth And Asteroids
Name: david a hart
Date: 1993 - 1999
Will Earth ever be hit by a giant asteroid or several?
How often the Earth is hit depends on the size of the asteroid or meteor.
One as large as the one that took out the dinosaurs 65 million years ago
probably only hits the Earth every few hundred million ye... | <urn:uuid:e943cf75-5256-4e9d-9090-7f273284f9ac> | 3.328125 | 140 | Knowledge Article | Science & Tech. | 46.638864 |
Probing Ecosystem Resilience to Climate Change in Arctic-Alpine Plants
de Witte, L.C., Armbruster, G.F.J., Gielly, L., Taberlet, P. and Stocklin, J. 2012. AFLP markers reveal high clonal diversity and extreme longevity in four key arctic-alpine species. Molecular Ecology 21: 1081-1097.
In discussing their findings De W... | <urn:uuid:c03ac71d-ee13-4cd7-b1c9-70aa5c4b9331> | 3.03125 | 607 | Academic Writing | Science & Tech. | 52.910317 |
An ambitious project to create an accurate computer model of the brain has reached an impressive milestone. Scientists in Switzerland working with IBM researchers, part of the Blue Brain Project, have shown that their computer simulation of the neocortical column, arguably the most complex part of a mammal's brain, app... | <urn:uuid:9d0a47f8-6573-451f-b0e1-b6939cb8ef8a> | 3.90625 | 396 | Knowledge Article | Science & Tech. | 23.189136 |
The CWEBx system is a system for Structured Software Documentation (also known as Literate Programming) in the programming language C. It is a derivative of the CWEB system by Sylvio Levy and Donald E. Knuth, who originally conceived the idea of Literate Programming; CWEBx is a compatible extension of CWEB.
The CWEBx d... | <urn:uuid:07389b07-7822-4794-8dd4-7161b8a1cc7c> | 2.921875 | 443 | Knowledge Article | Software Dev. | 36.359565 |
Young Star Cluster Found Aglow With Mysterious X-Ray Cloud
At a distance of 6,000 light years from Earth, the star cluster RCW 38 is a relatively close star-forming region. This image covers an area about 5 light years across, and contains thousands of hot, very young stars formed less than a million years ago. X-rays ... | <urn:uuid:05689212-0a55-45bf-98f9-1fb8cfd885ed> | 3.5 | 370 | Knowledge Article | Science & Tech. | 44.405784 |
The Mt. Redoubt volcano (located about 100 miles southwest of Anchorage, Alaska) produced a series of explosive eruptions beginning around 06:38 UTC on 23 March 2009. GOES-11 10.7 µm IR images (above) showed a few of the volcanic eruption clouds, which exhibited IR brightness temperature values of -50 to -58º C (yellow... | <urn:uuid:502ba1ee-11bd-4a4f-b0ee-02756936e4a6> | 2.796875 | 1,632 | Academic Writing | Science & Tech. | 43.654271 |
Name: Liz S.
In the "General Science Topics" section archives, there was a question
concerning recharging magnets. The answer given did not really, for me,
help me at all. Was the answer saying that we could take our magnets
somewhere and could have someone recharge them? Is there any way a 5th
grade teacher like mysel... | <urn:uuid:2652cd91-1d3c-4530-adc1-f34258cb13f7> | 3.203125 | 275 | Q&A Forum | Science & Tech. | 58.194956 |
What is Array?
An array in PHP is actually an ordered map, what is a map? A map is a type that associates values to the keys, you can consider as list, stack, hash table, dictionary or an array. An array can be created with the help of array() language construct. It takes number of parameters in the form of key=>value ... | <urn:uuid:549372a7-7ab1-4e37-8e05-533e8efea1f1> | 3.640625 | 342 | Documentation | Software Dev. | 56.159359 |
Right after my previous article that discussed the historical problems in Antarctica, I found another article about Antarctica in National Geographic that uses modelling to answer the “mystery” of the Antarctic sea ice increase over the past 30 years. The reason it is a mystery is because that increase in sea ice cover... | <urn:uuid:f7e026c4-e4e6-4a11-8d5d-ac8aaa25e651> | 2.9375 | 1,277 | Personal Blog | Science & Tech. | 54.566945 |
While most pundits are focusing on the campaign, New York Times columnist Kristof has taken the time to write a thoughtful op-ed (subs. req’d) on a story that will be with us long, long after congressional pages or macaca or botched jokes about Iraq.
He deserves special credit for devoting considerable ink to an area t... | <urn:uuid:26854f57-fa79-4899-b813-e3293205e0a0> | 2.703125 | 406 | Nonfiction Writing | Science & Tech. | 41.112802 |
Report links global warming, storms
- Keay Davidson, Chronicle Science Writer
Tuesday, September 12, 2006
Scientists say they have found what could be the key to ending a yearlong debate about what is making hurricanes more violent and common -- evidence that human-caused global warming is heating the ocean and providi... | <urn:uuid:64cc2d2e-7f51-4469-9c5f-2c509fce9e69> | 3.0625 | 1,138 | Comment Section | Science & Tech. | 32.992077 |
An Inordinate Fondness for Eukaryotic Diversity
Why do some groups of organisms, like beetles, have so many species, and others, like the tuataras, so few? This classic question in evolutionary biology has a deep history and has been studied using both fossils and phylogenetic trees. Phylogeny-based studies have focuse... | <urn:uuid:19ea8bf1-ff18-40d9-b0f6-6bbf67a15098> | 3.53125 | 322 | Nonfiction Writing | Science & Tech. | 37.033 |
|It almost looks like toothpaste for an elephant, doesn't it?|
Here's what you'll need:
- 1/2 cup 6% hydrogen peroxide (sold in beauty supply stores or online as 20 Volume Clear Developer )
- 2 tsp. yeast (1 packet)
- 3 tbsp. warm water
- dish detergent
- food coloring (optional)
- empty 16oz plastic bottle
- safety go... | <urn:uuid:83a490f1-76a3-419b-ac92-f4ed1ddaf9c8> | 2.75 | 472 | Tutorial | Science & Tech. | 66.905645 |
An improved method for nanocrystal placement for the floating gate of a flash memory cell, using a protein-mediated self-assembly approach, was described at IEDM by Shan Tang, U. of Texas, Austin. A template formed by a chaperonin protein lattice can be used to place nanocrystals of different types in a regular array a... | <urn:uuid:c0b39ea5-8381-41e1-8268-bac1ed264ef0> | 2.734375 | 440 | Truncated | Science & Tech. | 28.159073 |
Ocean's Ability to fix Nitrogen Underestimated
In order to predict how Earth's climate develops scientists have to know which gases and trace elements are naturally bound and released by the ocean and in which quantities. For nitrogen, an essential element for the production of biomass, there are many unanswered questi... | <urn:uuid:ff6bce7b-9a3b-4f11-98d8-e274802fc74b> | 3.953125 | 440 | Truncated | Science & Tech. | 28.224164 |
Many geologists of the time were still skeptical of the new theory that Earth’s climate could change at all. It wasn’t easy to think that Mother Nature had once put the whole globe into a deep freeze, but my hero got on-board with the program early. He argued (correctly) that much of the upper part of our country had o... | <urn:uuid:abf46d3c-1152-4f98-820f-e48bdcc687ed> | 3.5625 | 794 | Personal Blog | Science & Tech. | 56.751302 |
Recent News Articles
Genes are evidence of face shape
Dutch researchers say they’ve found genes that might hold clues to what shape a face may have, providing a useful DNA tool for forensics.
Researchers at the Erasmus University Medical Center in Rotterdam, in a study of almost 10,000 individuals, have discovered five... | <urn:uuid:322ad040-f621-4572-8d25-caedbb0ff2a0> | 3.296875 | 231 | Truncated | Science & Tech. | 23.259167 |
|pythonware.com||products ::: library ::: search ::: daily Python-URL!|
The text widget stores and displays lines of text.
The text body can consist of characters, marks, and embedded windows or images. Different regions can be displayed in different styles, and you can also attach event bindings to regions.
By default... | <urn:uuid:bedbe06e-9ac5-44d0-9d73-20bc65c9ba51> | 3.546875 | 1,868 | Documentation | Software Dev. | 56.03606 |
Rudyard Kipling’s Just So Stories tell tales not so much of evolution, but of the magic and wonder of the animal world. He describes the wizard who gave the camel a hump for its laziness, and the alligator who snapped and stretched the nose of a naïve young elephant to its current lengthy proportion. Those delightful f... | <urn:uuid:50621577-6c76-4768-93d4-9599e0a0e736> | 3.5 | 2,563 | Nonfiction Writing | Science & Tech. | 37.243348 |
An international research team led by Makoto Kishimoto from the Max Planck Institute for Radio Astronomy in Bonn presents some of the first long-baseline interferometric measurements in the infrared towards nearby Active Galactic Nuclei with the Keck interferometric telescope in Hawaii.
The team finds the measurements ... | <urn:uuid:4519e3ff-22cb-43f3-a2e4-898dfe4bb7fb> | 3.578125 | 967 | Knowledge Article | Science & Tech. | 31.420537 |