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WHAT IS GEOMETRY? Geometry is the field of mathematical knowledge dealing with spatial relationships. The earliest written records -- dating from Egypt and Mesopotamia about 3100 BC -- demonstrate that ancient peoples had already begun to devise mathematical rules and techniques useful for surveying land areas, constru... | <urn:uuid:42817b51-ab7a-483b-9eac-acfe50b3050e> | 3.203125 | 314 | Knowledge Article | Science & Tech. | 21.693839 |
Results from our forum
... cores are putted in that solutions it will loose or get water or doesn't loose or gain water. So the objective of this experiment is to find the hydric potencial of the potato. When the concentration of the solution is lower than the potato, water gets out from the potatoe. when the concentat... | <urn:uuid:171a8a35-0065-46fd-8567-48828b762027> | 3.25 | 76 | Truncated | Science & Tech. | 64.040801 |
Hamilton, J., Zangerl, A.R., Berenbaum, M.R., Sparks, J.P., Elich, L., Eisenstein, A. and DeLucia, E.H. 2012. Elevated atmospheric CO2 alters the arthropod community in a forest understory. Acta Oecologica 43: 80-85.
The authors write that "the response of complex plant and animal communities to global change is highly... | <urn:uuid:afaf1484-f0c7-4dfa-8259-b430ca2df263> | 2.890625 | 1,025 | Knowledge Article | Science & Tech. | 55.975996 |
Mathematics » Content » The Number System
Apply and extend previous understandings of multiplication and division to divide fractions by fractions.
- CCSS.Math.Content.6.NS.A.1 Interpret and compute quotients of fractions, and solve word problems involving division of fractions by fractions, e.g., by using visual fract... | <urn:uuid:28652538-dff7-426f-81ee-f12619be9be4> | 4.28125 | 1,887 | Tutorial | Science & Tech. | 68.592938 |
Peter Andreas Grünberg
Grünberg, Peter Andreas (pāˈtər ändrāˈäs grünbĕrkˈ) [key], 1939– German physicist, b. Pilsen, Germany (now Plzeň, Czech Republic). After receiving his Ph.D. at the Darmstadt Univ. of Technology in 1969, he was a postdoctoral fellow of the National Research Council of Canada at Carleton Univ. in O... | <urn:uuid:0fd2c8d7-4e67-447f-93b7-eb3682329b4b> | 3.15625 | 245 | Knowledge Article | Science & Tech. | 46.273722 |
. "3. Global Change Leading to Biodiversity Crisis in a Greenhouse World: The Cenomanian-Turonian (Cretaceous) Mass Extinction." Effects of Past Global Change on Life. Washington, DC: The National Academies Press, 1995.
The following HTML text is provided to enhance online
readability. Many aspects of typography transl... | <urn:uuid:5ed2ad98-08b4-495a-941a-a29d8d3e974d> | 3.296875 | 1,345 | Academic Writing | Science & Tech. | 21.078076 |
Q: What are the physical and/or chemical processes that take place when the creases in clothes are removed by ironing? Is the process independent of the type of material ironed?
A: Fabrics contain fibres, each of which is composed of many long-chain molecules lying alongside one another and loosely bonded together. If ... | <urn:uuid:47720315-3e23-472c-813a-171c80c0174d> | 3.46875 | 220 | Truncated | Science & Tech. | 42.710351 |
As a Scotsman I have to correct a statement in the item about the cosmic "smoke ring" - a form of wave known as a soliton (9 April, p 15).
The Scottish engineer John Scott Russell saw his soliton from the Forth and Clyde Canal, not the Union Canal, as you state. The Forth and Clyde Canal runs from Bowling on the river ... | <urn:uuid:5ee179c2-8157-47bb-8089-c34adb9e830a> | 2.84375 | 141 | Truncated | Science & Tech. | 62.499048 |
Have you ever gotten an e-mail with a list of math instructions that amazingly ends up telling you your age or some other vital statistic?
I just got one that first had me select the number of times I wanted to
eat chocolate in a week (within specific parameters) and then followed it with a list of math directions that... | <urn:uuid:80935e5d-c049-405d-bb09-dedc1194f540> | 2.78125 | 577 | Tutorial | Science & Tech. | 78.747501 |
The Semantic Web: A Primer
by Edd Dumbill | Pages: 1, 2
Semantic Web Technologies (con'td)
The W3C's Resource Description Framework is one of the cornerstones of Semantic Web work. While its somewhat unwieldy syntax often attracts negative attention from XML developers, the real value of RDF is the data model. It defin... | <urn:uuid:de9de1db-5435-43b9-9f79-2e4aff32ed26> | 3.078125 | 1,710 | Documentation | Software Dev. | 39.235579 |
A Productive Star Formation Factory
W3 is a region where many massive stars are forming in a string of stellar clusters, located about 6,000 light years from Earth in the Perseus arm of the Milky Way galaxy. W3 is part of a vast molecular cloud complex that also contains the W4 superbubble (not seen in this image). Sci... | <urn:uuid:c82f6341-5493-47bc-84df-dae30ae17382> | 3.359375 | 357 | Knowledge Article | Science & Tech. | 46.175459 |
Silver crystals are beautiful and easily grown metal crystals. You can watch crystal growth under a microscope or let the crystals grow overnight for larger crystals.
Time Required: Instantly to Overnight
- Suspend a piece of copper wire in 0.1M silver nitrate in a test tube. If you coil the wire you will get high surf... | <urn:uuid:93054f00-962a-485e-809b-c8c02bf694b7> | 2.796875 | 266 | Tutorial | Science & Tech. | 60.015385 |
The content on this web page was last updated in December of 2012.
For more information: http://www.nmfs.noaa.gov/stories/2012/11/82corals.html
Update - 2012
November 30, 2012: NOAA Fisheries is proposing Endangered Species Act (ESA) listings for 66 coral species: 59 in the Pacific and seven in the Caribbean.
- In the ... | <urn:uuid:435ca037-6c8e-4b4b-b20c-ff7bfdd97cd8> | 3.25 | 909 | Knowledge Article | Science & Tech. | 45.817088 |
|Home | Welcome | What's New | Site Map | Glossary | Weather Doctor Amazon Store | Book Store | Accolades | Email Us|
The Superior Mirage:
This is illustrated in the above diagram. Because of this bending, we see the object floating in the sky, above or even attached to the original object. In cases of strong looming, ... | <urn:uuid:1d0c53c9-7b81-4812-9dd9-7b98d96538ec> | 3.484375 | 2,394 | Knowledge Article | Science & Tech. | 39.208844 |
As can be seen by observing this graph, we get hyperbolas when we vary
c and let a=b. When c>=-1/2 the hyperbolas are in the first and third
quadrant and when c<-1/2 they lie in the second and fourth quadrant.
The smaller the value of c; the closer the hyperbolas are to the focal
point or the point of symmetry. The lar... | <urn:uuid:d73aa20e-79a9-45b2-b677-fc7db5e22362> | 4.03125 | 1,054 | Academic Writing | Science & Tech. | 75.516923 |
I've been doing revision for my yearlies and I've been struggling with these questions:
1) Prove that, if the difference between the roots of the equation ax^2 + bx + c = 0 is 1, then a^2 = b^2 – 4ac.
2) P is a variable on the curve y = 2x^2 + 3 and O is the origin. Q is the point of the section of OP nearer the origin... | <urn:uuid:681ffa5f-4c00-4fd1-87d6-75678bd0c779> | 2.984375 | 221 | Q&A Forum | Science & Tech. | 101.130142 |
Nanotechnology engineers have 3D printed an ear from calf cells and silver nanoparticles that picks up radio signals at frequencies beyond human capacity. The creation is part of their greater plan to one day build spare parts for humans cyborgs to don.
Rather than simply adding electronics to an ear, the team from Pri... | <urn:uuid:fadaa8a3-7d21-438c-b424-ec734c9b04d4> | 3.625 | 161 | Personal Blog | Science & Tech. | 41.674103 |
A photomultiplier works by ejecting an electron every time a photon hits, and collecting it after it has been accelerated a great length, to knock out more electrons from more plates, and these are accelerated, and so on, until you get a macroscopic current you can measure. The noise comes from random electrons getting... | <urn:uuid:a82b24af-4d5a-4a10-8187-c2eae8495bb0> | 3.3125 | 380 | Q&A Forum | Science & Tech. | 41.515995 |
The model-view-controller (MVC) pattern has an interesting, let’s call it sub-pattern, that could be more broadly used. The basic purpose of MVC is to “clean up” the data (model) and interface (view) by delegating all the in-between “dirty” logic to the controller. The controller is aware of both the data and... | <urn:uuid:8b5b8ad0-0fa2-44d0-9332-a5ec040438d8> | 3.109375 | 1,003 | Personal Blog | Software Dev. | 40.877377 |
An optical conveyor belt for moving sub-micron objects has been achieved
by collaborating physicists at the Institute of Scientific Instruments
in Brno, Czech Republic and at the University of St. Andrews in Scotland.
Their set-up used a special type of non-diffracting laser light that
forms a very narrow beam existing... | <urn:uuid:2183357f-9d95-4652-b944-61f4a64ab768> | 3.46875 | 439 | Knowledge Article | Science & Tech. | 41.733974 |
Learn about global warming, carbon footprints and alternative energies.
Global Warming. Global Action. Global Future. Introducing 350.
Reducing Emissions. Carbon Footprint Calculator.
Eat the View campaigns to plant edible landscapes.
Find out about Acton's Solar Panel which feeds clean electricity into the ABRSD grid.... | <urn:uuid:2b6555b1-ebc4-405c-9861-f89650722a12> | 3.234375 | 320 | Content Listing | Science & Tech. | 43.091573 |
Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °
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Matriculation level - #n+1
1.Which term of the arithmetic progression
is the first negative term?
2. The sum of three numbers in Arithmetic Progression is 54 and their product is 5670. ... | <urn:uuid:4ac461dd-c33c-4edf-b500-6b20c2640505> | 2.703125 | 410 | Comment Section | Science & Tech. | 104.98069 |
space:uk - October 2007, Issue 23
From the UK Space Agency, this issue of Space:UK magazine contains news and features on:
• Plans for missions to the Moon, Mars and beyond.
• Tracking the world’s first spacecraft.
• Satellites to help save lives.
• Getting to grips with space weather.
• How many satellites orbit the E... | <urn:uuid:9769369f-2d10-4d68-921b-364020e0a6c8> | 2.75 | 180 | Knowledge Article | Science & Tech. | 46.212922 |
PHP Component and Library API Design Overview
There's been lots of change in the PHP community over the past few years. PHP now has namespaces. More PHP developers are using an IDE. More PHP developers are pulling inspiration from the Java, C#/.NET, and Ruby communities. And even more PHP developers are embracing the o... | <urn:uuid:7c197ba2-52c0-4544-a689-52edecc99c86> | 2.90625 | 1,006 | Knowledge Article | Software Dev. | 38.386703 |
is to burn. In every complete combustion equation a hydrocarbon(CxHy)
reacts with oxygen (O2)
to produce water (H2O)
and carbon dioxide (CO2).
Combustion reactions that the pattern of : CxHy +
O2(g) --> H2O(g)
25O2 --> 18H2O
reacts with oxygen gas to produce water and carbon
let’s go step by step.
Write the reaction fo... | <urn:uuid:aee94462-fe50-4803-8eb5-97e0fcbe4edd> | 3.515625 | 239 | Tutorial | Science & Tech. | 73.843006 |
I have revised my views slightly since I began this thread.
A decrease in Cloud Cover is responsible for most of the warming over the last 30 years and last century, and this decrease in Cloud Cover is directly tied to solar activity variations through solar wind variations inflicting changes on GCRs.
There is an overw... | <urn:uuid:545e7998-3197-4892-ae19-39e7e3f7d3aa> | 2.953125 | 1,320 | Comment Section | Science & Tech. | 47.938141 |
This is part of 10998521's Mathematics for the Layman project, which you can read more about on his homenode.
Reductio ad absurdum sounds like fancy Latin, but it's actually a very widely-used method of proof. Say you start with some idea that you want to prove: this is the postulate or conjecture. To prove it, we firs... | <urn:uuid:c14d8850-e99d-4360-add6-0daaf8a63963> | 3.421875 | 227 | Knowledge Article | Science & Tech. | 50.531577 |
See also the
Browse High School Calculus
Stars indicate particularly interesting answers or
good places to begin browsing.
Selected answers to common questions:
Maximizing the volume of a box.
Maximizing the volume of a cylinder.
Volume of a tank.
What is a derivative?
- Integrals and Trig Functions [4/6/1996]
The inte... | <urn:uuid:7f6bc432-3f7b-40c3-a9e1-c5f15186d8c4> | 2.6875 | 1,677 | Q&A Forum | Science & Tech. | 89.95791 |
What caused a giant arrow-shaped cloud on Saturn's moon Titan?
A research group led by Jonathan L. Mitchell, UCLA assistant professor of earth and space sciences and of atmospheric and oceanic sciences, has answered this question by using a global circulation model of Titan to demonstrate how planetary-scale atmospheri... | <urn:uuid:fb38ed93-560b-445a-92e9-04b57503a820> | 3.875 | 1,618 | Content Listing | Science & Tech. | 40.520822 |
- crypt(word, salt) -> string
word will usually be a user's password. salt is a 2-character string
which will be used to select one of 4096 variations of DES. The characters
in salt must be either ".", "/", or an alphanumeric character. Returns
the hashed password as a string, which will be composed of characters from
... | <urn:uuid:44913c9c-28d7-4b97-bef6-71b16cf8aea2> | 3.546875 | 84 | Documentation | Software Dev. | 72.406098 |
VBS Home page,VBS Course Navigator, Protein Synthesis and DNA replication, DNA Replication, Previous Page, Next Page,top of page
The replication or duplication of DNA depends on one main idea, namely that the nitrogen bases of the nucleotides are complementary to each other on opposite halves of the molecule as shown h... | <urn:uuid:31b5b962-e54e-401c-b3cd-ea756f5eaf16> | 4.09375 | 813 | Knowledge Article | Science & Tech. | 29.222305 |
Robert Kaufmann, a professor at Boston University, said he was motivated to conduct the study after a sceptic confronted him, telling him he had seen that temperatures had not risen over the decade.So, that darned coal that emits CO2 which, according to the Fraud, the falsified hypothesis, causes uncontrollable global ... | <urn:uuid:447cf1f4-2dca-4583-98f7-9a35abf4e6e5> | 2.90625 | 529 | Personal Blog | Science & Tech. | 51.768317 |
Related Labs, Activities, and Other CoolStuff
Quantitatively confirm the Combined Gas Law with one complete apparatus!
The Combined Gas Law simplifies the Ideal Gas Law and describes a relationship between the pressure, temperature and volume of a gas that is constant. Students can verify this relationship using air an... | <urn:uuid:36a71741-733a-4c10-be76-9829493cb59a> | 3.421875 | 111 | Truncated | Science & Tech. | 33.106449 |
Demand for groundwater has increased as access to surface water supplies has become constrained. Groundwater resources are now being managed through water sharing plans for sustainable long-term usage.
Groundwater is generally seen as a supplementary water resource. However, for many communities in regional NSW, ground... | <urn:uuid:c6fc2c68-dea9-4c4a-a873-40a697e18d14> | 3.703125 | 955 | Knowledge Article | Science & Tech. | 26.826884 |
For inquiries contact Stephen
D. McCormick, Conte Anadromous Fish Research Center,
Biological Resources Division, USGS, Turners Falls, MA
Atlantic salmon are known as the "king of fish," an appropriate title for many reasons. Atlantic salmon make a tremendous journey during their lifetime, migrating from the fresh wate... | <urn:uuid:2968555f-52b0-41f2-b94c-2e169dfe03fd> | 3.15625 | 932 | Knowledge Article | Science & Tech. | 45.954389 |
In our image server example, it is possible that the single file server used to store images could be replaced by multiple file servers, each containing its own unique set of images. (See Figure 4.) Such an architecture would allow the system to fill each file server with images, adding additional servers as the disks ... | <urn:uuid:58647d6d-9484-4a7f-8940-80153187973c> | 2.8125 | 1,550 | Personal Blog | Software Dev. | 41.928268 |
Containers (synonym: collection) are objects that hold multiple Entries for any purpose.
Container here only serves to represent the fact that an Entry finds itself in the company of other Entries.
The container is not defined here beyond its property of containing multiple entries, so other behaviors are open.
Contain... | <urn:uuid:4fb52f01-5e93-43d9-8990-9508a05bb8b9> | 2.875 | 922 | Comment Section | Software Dev. | 41.456611 |
Viruses are not usually regarded as living cells. A virus 'particle' requires a living host cell in order to reproduce. Although we usually think of viruses as causing diseases, they also are an integral part of natural ecosystems controlling the size of bacterial populations by preying on them. This image was provided... | <urn:uuid:7a242b8f-23e5-4b11-835f-56e736189690> | 3.015625 | 112 | Knowledge Article | Science & Tech. | 24.111884 |
Stolen diamonds can all too easily be sold on to unsuspecting buyers. So to help establish the real owner, Gersan of Liechtenstein has found a way to engrave their name onto jewels without without spoiling their appearance (GB 2361671). First, the gem is coated with a fine layer of gold. It is then mounted in a vacuum ... | <urn:uuid:c097a652-a54f-43d2-aa39-e60844148952> | 2.953125 | 183 | Truncated | Science & Tech. | 59.814159 |
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Tachyons And Sending Messages Back In Time
Fri Sep 23 21:23:11 BST 2011 by Eric Kvaalen
This doesn't necessarily violate Relativity. It could simply mean that neutrinos are "tachyons", particles that always go faster than light. It's as though they have an imaginary rest mass. But I'm no... | <urn:uuid:33af2281-0424-4ee4-b09b-2ae24d3cca68> | 2.9375 | 194 | Comment Section | Science & Tech. | 58.742264 |
Before you can do anything, you must initialize a database storage area on disk. We call this a database cluster. (SQL uses the term catalog cluster instead.) A database cluster is a collection of databases is accessible by a single instance of a running database server. After initialization, a database cluster will co... | <urn:uuid:358b9b75-ff23-47b2-8f3c-0976bd8f4836> | 3.265625 | 1,171 | Documentation | Software Dev. | 49.006712 |
OpenGL (Open Graphics Library) is a standard specification defining a cross-language cross-platform API for writing applications that produce 2D and 3D computer graphics.
This free video tutorial teaches 3D programming in C++ using OpenGL and GLUT. It covers both OpenGL syntax and 3D programming in general. It is desig... | <urn:uuid:89187b81-ea5c-42be-bba1-3a45a34450d2> | 3.234375 | 439 | Content Listing | Software Dev. | 62.298669 |
It is written by the inventors of the java technology, The Java Language Specification, III Edition is a technical reference for the Java language.
In java a layout manager class implements the LayoutManager interface. It is used to determine the position and size of the components within a container.
A locale class in... | <urn:uuid:4409b519-c462-4707-a19c-27f03d76cd82> | 3.1875 | 385 | Knowledge Article | Software Dev. | 45.106506 |
Earth Sciences Research Journal
versão impressa ISSN 1794-6190
CHICANGANA, GERMAN. THE ROMERAL FAULT SYSTEM: A SHEAR AND DEFORMED EXTINCT SUBDUCTION ZONE BETWEEN OCEANIC AND CONTINENTAL LITHOSPHERES IN NORTHWESTERN SOUTH AMERICA . Earth Sci. Res. J. [online]. 2005, vol.9, n.1, pp. 50-64. ISSN 1794-6190.
The Romeral Fau... | <urn:uuid:abcf5d2c-556a-49f6-8129-bd0d283c2400> | 3.046875 | 669 | Academic Writing | Science & Tech. | 26.849681 |
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.
2011 May 25
Explanation: What's that rising from the clouds? The space shuttle. If you looked out the window of an airplane at just the right place ... | <urn:uuid:add30b5a-aafc-42cf-9092-99bb26ea8b5e> | 3.546875 | 260 | Knowledge Article | Science & Tech. | 47.340777 |
Detecting Blooms of the Dinoflagellate
Karenia brevis From Space
Blooms of the toxic dinoflagellate Karenia brevis (formerly
Gymnodinium breve ) occur periodically off the Gulf coast of
Florida in the fall and early
winter. These blooms, often referred to as "red tides" because
their presence discolors the water a redd... | <urn:uuid:853ee5c7-5e63-436d-8747-6dc195365d34> | 3.25 | 821 | Academic Writing | Science & Tech. | 44.752631 |
Source code: Lib/pyclbr.py
The pyclbr module can be used to determine some limited information about the classes, methods and top-level functions defined in a module. The information provided is sufficient to implement a traditional three-pane class browser. The information is extracted from the source code rather than... | <urn:uuid:af1f37c4-2c82-4f22-80a3-32eb2e9924b7> | 2.96875 | 398 | Documentation | Software Dev. | 39.709679 |
Willis Eugene Lamb, Jr. (July 12, 1913 – May 15, 2008) was a physicist who won the Nobel Prize in Physics in 1955 "for his discoveries concerning the fine structure of the hydrogen spectrum".
- In fact, there really is not a new law of nature. It was all in the theory to begin with but nobody worked it out.
- relating ... | <urn:uuid:8ca8aa79-249f-4bbc-ac14-91870dcac552> | 2.84375 | 131 | Knowledge Article | Science & Tech. | 72.518816 |
The Laws of Thermodynamics
The Zeroth Law of Thermodynamics
The zeroth law expresses that having in existence three systems, A, B, and C, if A is in equilibrium with C and B is in equilibrium with C, then A and B will also be in equilibrium. All three systems will be in equilibrium in temperature. If any of these syste... | <urn:uuid:e0465e74-d703-42a8-b568-d1e8be76c937> | 3.90625 | 1,388 | Knowledge Article | Science & Tech. | 46.567104 |
Now I have Class B variables which I also need to use in Class A. And
also one another Class C, Class A add in Class C (not inherits), and I
want to use Class B variables in Class C.
How can I access?
Short answer: No, you can't do what you propose.
Longer, more detailed explanation:
Classes don't have variables -- obj... | <urn:uuid:8adcce78-39d8-4b76-a98c-e25d368af2ca> | 2.828125 | 592 | Q&A Forum | Software Dev. | 60.990852 |
Episode 219: Preparation for momentum topic
- understand the term momentum, and the principle of conservation of momentum
- investigate momentum changes experimentally
- solve numerical problems involving collisions and explosions
- gain experience with suitable equipment for measuring speed e.g. motion sensors, light ... | <urn:uuid:f2e5ad0b-f004-469a-8053-f13faf495d66> | 4.125 | 316 | Truncated | Science & Tech. | 34.332732 |
for These Tiny Machines
October 16, 2001
CAMBRIDGE - Inside a seemingly sober Harvard laboratory, the Lego mating dance unfolds.
Pale pieces of plastic are riding currents in a twirling flask of warm saltwater. When one piece touches another, it is usually rebuffed, bouncing away. But sometimes the approach is just rig... | <urn:uuid:cc0ee22a-9e0e-42f9-be66-7a826ed9b07b> | 3.40625 | 1,866 | Nonfiction Writing | Science & Tech. | 43.627758 |
Astronomy Picture of the Day
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.
Explanation: This cosmic vista stretches almost 20 degrees across the gentle constellation Taurus. It begins at the Plei... | <urn:uuid:d5ee3410-ea38-41a0-a17a-ebd6ff3fdbf5> | 3.1875 | 263 | Personal Blog | Science & Tech. | 52.40254 |
March 20, 1998
AirMISR Flight of 20 March 1998, JPL, Pasadena, CA
A general description of the Airborne Multi-angle Imaging Spectro-Radiometer (AirMISR) is given on the AirMISR page.
The images included below are from AirMISR operational flight No. 4, over Pasadena, California, and includes the location of NASA's Jet P... | <urn:uuid:95bbe2bc-c963-420e-a934-ae48d0954584> | 2.84375 | 1,040 | Knowledge Article | Science & Tech. | 46.192336 |
A system of colliding galaxy clusters, nicknamed the Musket Ball Cluster, has been discovered. In these images of the Musket Ball Cluster, the hot gas observed with Chandra is colored red, and the galaxies in the optical image from Hubble appear as mostly white and yellow. The location of the majority of the matter in ... | <urn:uuid:b603a1da-fc53-426c-9451-b18c48030209> | 3.609375 | 819 | Knowledge Article | Science & Tech. | 37.777783 |
Once more I have to apologise in advance to any statistics practitioners. In the prior article we explored basic statistics terminology and dealt with the expected value or mean of a set of determined values. Here, we extend this to the median, mode, variance and the helpful standard deviation. Hopefully, this article ... | <urn:uuid:a3c2c33c-35c0-4d6e-a519-f57427805547> | 3.65625 | 1,329 | Personal Blog | Science & Tech. | 98.343837 |
Archaeognatha (jumping bristletails)
Monura - extinct
Thysanura (common bristletails)
Palaeodictyoptera - extinct
Odonata (dragonflies and damselflies)
Orthoptera (grasshoppers, cricketss, katydids)
Phasmatodea (walking sticks, timemas)
Psocoptera (booklice, barklice)
Hemiptera (true bugs)
Miomoptera - extinct
Megalopt... | <urn:uuid:d4a133eb-71cd-4545-a985-bd55ffefe796> | 3.75 | 955 | Knowledge Article | Science & Tech. | 31.469216 |
Point is a special buffer position used by many editing commands, including the self-inserting typed characters and text insertion functions. Other commands move point through the text to allow editing and insertion at different places.
Like other positions, point designates a place between two characters (or before th... | <urn:uuid:9a0a3dd5-66b0-413e-8658-e876f195af9e> | 3.828125 | 473 | Documentation | Software Dev. | 55.441497 |
Effect Of Molten Core Of Earth By The Black Hole At Center Of Universe
Sun Feb 01 11:34:52 GMT 2009 by Shirley Miller
Reading this article made me think about the earth's molten core. Will the gravity pull of the black hole at the center of our Milky Way Galaxy change the shape of the earth in 2012? I read somewhere th... | <urn:uuid:b7602279-d5b0-49d7-8be7-0eeea6fc9993> | 3.265625 | 251 | Comment Section | Science & Tech. | 80.644607 |
The atlas presents an analysis of relative abundances of extant planktic foraminifera (>150 µm) in surface sediments of the Indian Ocean and the North Atlantic, based on CLIMAP data. Relative abundances of each species are plotted against latitude, and winter, summer, mean values, and a seasonality parameter of tempera... | <urn:uuid:3af78c93-c2aa-439f-80cd-f2462438e1ca> | 2.765625 | 631 | Academic Writing | Science & Tech. | 35.589936 |
Japan looks to ancient village wisdom to save biodiversity
Toyooka, Japan (AFP) Oct 27, 2010
Four decades ago the oriental white stork became extinct in Japan, the victim of rapid industrialisation and modern farm practices and heavy pesticide use that destroyed its habitat.
Today, the graceful migratory bird soars aga... | <urn:uuid:444ab381-e38c-4b88-aa64-80ce88c395bf> | 2.75 | 1,181 | Truncated | Science & Tech. | 34.167883 |
“Folds are perhaps the most common tectonic structure developed in deformed rocks” (from Ramsay & Huber 1987) and folds occur in rocks from the millimeter to the lithospheric scale. Understanding the mechanics of folding is therefore essential for understanding tectonic processes in compressional settings. We study fol... | <urn:uuid:81db62e5-d895-4b02-9085-cd236c3b32de> | 3.53125 | 214 | Knowledge Article | Science & Tech. | 23.347097 |
People used to establish physical laws on the mathematical frame directly, without considering the existence of the No-Shape-Substance. Such physical laws are separated from nature. By analyzing the interaction between the body and the No-Shape-Substance, we will have a newer and better understanding of physical laws o... | <urn:uuid:80d14126-5add-44be-a702-8b96dee87ebb> | 2.71875 | 131 | Truncated | Science & Tech. | 35.101 |
There are numerous examples of sessile animals (sponges, barnacles etc.) but are there any examples of motile plants? If not, why not? Surely mobility would have conferred an evolutionary advantage to some plant species. I am specifically thinking of locomotion here.
It depends how you define locomotion.
If you take it... | <urn:uuid:21fb80b1-9b1a-4ca0-9b6b-a40a395996c9> | 3.5 | 394 | Q&A Forum | Science & Tech. | 50.625455 |
Global environmental challenges
Rather than answering that it was actually a one-time sub editor for The Economist magazine, Herbert Spencer, who coined the phrase, or fighting back with an equally wrong comment about someone being descended from monkeys, Darwin academics are calling for a moratorium on the everyday us... | <urn:uuid:ed05d7ea-bedf-45f8-b9a0-d6e4a1bfb730> | 2.734375 | 501 | Personal Blog | Science & Tech. | 28.491154 |
[Tutor] input and raw input
bkjones at gmail.com
Sat Sep 25 18:36:40 CEST 2010
On Sat, Sep 25, 2010 at 9:40 AM, Evert Rol <evert.rol at gmail.com> wrote:
> > any one have an idea about how we can input many number in the one time
> and change it to list.
> > for example:
> > a=input("Enter the number of your class in t... | <urn:uuid:07960603-7683-467a-bb8e-08ee8fbc4a79> | 3.1875 | 645 | Comment Section | Software Dev. | 86.796154 |
An article by David Rose appears today in the Mail on Sunday under the title: ‘Global warming stopped 16 years ago, reveals Met Office report quietly released… and here is the chart to prove it’
It is the second article Mr Rose has written which contains some misleading information, after he wrote an article earlier th... | <urn:uuid:e431d0f6-bdc7-4ccb-9c29-7a4ebabbeb73> | 2.9375 | 934 | Comment Section | Science & Tech. | 51.504569 |
This activity is best done with a whole class or in a large group.
Can you match the cards? What happens when you add pairs of the
Dotty Six is a simple dice game that you can adapt in many ways.
This article for teachers describes how number arrays can be a
useful reprentation for many number concepts.
This article fo... | <urn:uuid:92577955-8cd4-405c-9c24-b63a786243a6> | 3.171875 | 200 | Content Listing | Science & Tech. | 58.544205 |
Last week, AREVA, the French reactor manufacturer, announced that they plan to build a facility to produce medical-grade lead-212. That caught my eye, because lead-212 is a product of the decay of radioactive materials like thorium and radium. Lead-212 can be attached to cell-specific peptides to target and kill cancer... | <urn:uuid:5d22c939-9e62-436f-b2db-4d33ace622e6> | 3.375 | 420 | Personal Blog | Science & Tech. | 57.425362 |
X-rays From A Young Supernova Remnant
NASA – More than fifty years ago, a supernova was discovered in M83, a spiral galaxy about 15 million light years from Earth. Astronomers have used NASA’s Chandra X-ray Observatory to make the first detection of X-rays emitted by the debris from this explosion.
Named SN 1957D becau... | <urn:uuid:64f8ead4-9ac1-4d13-a662-46ac7dcd157a> | 3.6875 | 1,312 | Content Listing | Science & Tech. | 50.635417 |
The winner of the Best Student Paper award atthe 2011 Annual Meeting was Tara Syc, a student in Steve Szedlmayer’s Auburn University marine fish lab in Fairhope. The title of her talk was “A Comparison of Red Snapper, Lutjanus campechanus, from “old” (2006) to “new” (2009/2010) artificial habitats in the northern Gulf ... | <urn:uuid:fd2a4566-7237-4235-9572-ac03d9c26e83> | 2.90625 | 670 | Academic Writing | Science & Tech. | 56.703403 |
Science Fair Project Encyclopedia
The kimura-gumo (Heptalhela kimurai) is a spider, named after Kimura Arika, who discovered it in 1920. It belongs to the sub-order Liphistiomorphae (primitive burrowing spiders). Their burrows are covered by a camoflaged "pill box" cover.
For photographs of spiders and the entrance to ... | <urn:uuid:0d2d7442-b0ba-436e-98fa-314265afe529> | 3.34375 | 390 | Knowledge Article | Science & Tech. | 59.526962 |
A dust storm that arose on January 11 spread toward the south and east the next day. The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite acquired this natural-color image on January 12, 2013.
By the time MODIS captured this scene, the dust stretched from the coast of Pakistan to the Stra... | <urn:uuid:154f4caa-05f0-41c0-80b6-25b5ed90d815> | 3.90625 | 230 | Knowledge Article | Science & Tech. | 59.567201 |
Handles to derived datatypes can be passed to a communication call wherever a
datatype argument is required.
A call of the form MPI_SEND(buf, count, datatype , ...), where
, is interpreted as if the call was passed a new datatype
which is the
concatenation of count copies of datatype.
MPI_SEND(buf, count, datatype, des... | <urn:uuid:07bba630-fe0a-454d-bf7c-877541d7ff9f> | 2.71875 | 1,870 | Documentation | Software Dev. | 45.305926 |
Sea Water Differences by Location
Country: United States
Date: August 2007
There is nothing separating the sea water from Florida and
New York. So, how is it that in Miami I can see the crystal clear
water and view my feet and in New York I cannot? Is there a natural
form of water purification? If so what is it?
Water ... | <urn:uuid:2f57d7a2-60e9-4cc3-acaf-52db9fe83456> | 3.03125 | 324 | Knowledge Article | Science & Tech. | 44.642017 |
Total-reflectance measurements on a number of igneous rocks and other minerals indicate that reststrahlen features may be of use for remote probes into the nature of the surfaces of the moon and planets. Varying particle size introduces effects such as reduced spectral contrast and in some cases new features that could... | <urn:uuid:1cdc3e23-1616-4d88-adc9-6caaa99e36a4> | 2.875 | 156 | Academic Writing | Science & Tech. | 52 |
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Project Coordinator: Hugo Araníbar; email@example.com
Project area: Lake Titicaca; Bolivia and Peru
The Titicaca Flightless Grebe is endemic to the Lake Titicaca catchment in Bolivia and Peru. It is considered Endangered as it has suffered from very rapid population reductions. The species declined by 15% between 2003 ... | <urn:uuid:890b2514-f2a2-4f01-b84d-b751a8024d8e> | 3.375 | 382 | Knowledge Article | Science & Tech. | 33.664152 |
Steven Strogatz on math, from basic to baffling.
There’s a narrative line that runs through arithmetic, but many of us missed it in the haze of long division and common denominators. It’s the story of the quest for ever-more versatile numbers.
The “natural numbers” 1, 2, 3 and so on are good enough if all we want to do... | <urn:uuid:f9b433cb-7df9-45b8-9e8e-7dd13e4b1188> | 2.984375 | 240 | Personal Blog | Science & Tech. | 48.581824 |
Publication: Research - peer-review › Journal article – Annual report year: 2011
We present the case of degradation of organic solar cells by sunlight concentrated to a moderate level (similar to 4 suns). This concentration level is not enough for sufficient acceleration of the photobleaching or trap-generation in the ... | <urn:uuid:f0bb723b-7d97-4eef-b58a-e7f027a48dc3> | 2.75 | 242 | Truncated | Science & Tech. | 26.344286 |
The advent of large catalogs with more accurate positions enables the WCSTools
IMWCS program to fit more accurate world coordinate systems to images. There
has always been a question as to how the error in matching images to source
catalogs was split between the uncertainties of the catalog positions, the
uncertainties... | <urn:uuid:4ddd0cdb-c518-431d-93db-1d627576685a> | 2.890625 | 367 | Academic Writing | Science & Tech. | 38.185996 |
Mark Wilson October 14th, 2012
I begin my Invertebrate Paleontology course by giving each student a common fossil to identify “by any means necessary”. This year I gave everyone a gray little brachiopod, one of which is shown above. They did pretty well. Kevin Silver (’13) got it down to the genus quickly. Turns out a ... | <urn:uuid:3e7d4e49-3bb7-45ae-8f66-2e8f2a3a3229> | 3.28125 | 420 | Personal Blog | Science & Tech. | 36.136742 |
Why Things Have Color
(see description below the applet)
In this applet, white light entering from the left is dispersed with a prism, passes through the material and is recombined in the second prism. If the material, as modeled by a particle in a box, is absorbing light of a certain color, say green, the transition a... | <urn:uuid:e34dacbd-32de-4a06-86b0-5085bcf2662c> | 3.59375 | 174 | Tutorial | Science & Tech. | 42.432978 |
In HTML, you have 3 basic types of lists. You have an ordered list, an unordered list, and a definition list. An ordered list is basically a numbered list. Do you remember when you were little and your teacher told you to number your paper from one to ten? Well everytime you did that you were making an ordered list. In... | <urn:uuid:14faa69e-5c56-4829-a989-65a145b83305> | 3.484375 | 651 | Tutorial | Software Dev. | 71.235684 |
In contrast to the sparse network of coastal and mid-ocean island tide gauges, measurements of sea level from space by satellite radar altimetry provide near global and homogenous coverage of the world's oceans, thereby allowing the determination of regional sea level change. Satellite altimeters also measure sea level... | <urn:uuid:18f09589-7afe-43dd-a7a8-30c5360fa002> | 3.875 | 1,092 | Academic Writing | Science & Tech. | 49.353337 |
A RIDDLE of the sea is how air-breathing animals manage to dive so far beneath the waves and stay down for so long. Such acts are obviously no problem for fish, which have gills. But people diving without the aid of special gear can stay under for no more than minutes and go down no more than a few hundred feet before ... | <urn:uuid:8f974932-a676-48a9-a35f-239e5a1ec4bd> | 3.40625 | 777 | Truncated | Science & Tech. | 60.283104 |
Explain the start() and stop() methods of applet life cycle.
Start and Start method of Applet Life Cycle
Start () method: The start method of an applet is called after the initialization method init(). This method may be called multiples time when the Applet needs to be started or restarted. For Example if the user wan... | <urn:uuid:29f5a8ac-1053-42d2-8d31-c5f05a9e8234> | 3.078125 | 222 | Q&A Forum | Software Dev. | 58.821117 |
The order Lepidoptera is the second largest order in the class Insecta and includes the butterflies, skippers, and moths.
This order has more than 180,000 species in 127 families and 46 superfamilies.
It is second only to the Coleoptera (the beetles) in number of described species.
Lepidopterans undergo complete metamo... | <urn:uuid:7c0a8e45-f64f-4ba8-a2a6-b97ba1f9f332> | 3.75 | 241 | Knowledge Article | Science & Tech. | 33.144118 |
This is a drawing of what the surface of a comet might look like.
Click on image for full size
The Comet Nucleus
A comet nucleus is the very center of the comet. It is solid and is made of
a special sort of dust which scientists call "fluffy". They call it fluffy because it is full of holes and could be very light.
At ... | <urn:uuid:f7fe1041-3330-468d-87e7-f02e31887536> | 4.21875 | 547 | Content Listing | Science & Tech. | 67.554377 |
This figure illustrates the motions of the interior which help generate the magnetosphere.
Click on image for full size
Image from: Random House Atlas
The Making of Uranus' Magnetosphere
Magnetospheres are generated with 1.) magnetic materials and 2.) with motions within the magnetic material.
The Earth-like planets ge... | <urn:uuid:ff2eb967-8f2c-4269-8b1a-023246e81f78> | 3.96875 | 472 | Content Listing | Science & Tech. | 42.607476 |
© 2002, Astronomical Society of the Pacific, 390 Ashton Avenue, San Francisco, CA 94112.
|Forward the URL for this issue to a friend.|
by Gibor Basri, UC Berkeley
The Problem with Pluto
Planets and Brown Dwarfs
Born Into the Right Class?
Runts and Runaways
Ask anyone on the street to give an example of a planet, and th... | <urn:uuid:9efaa4e3-4beb-4c55-aa40-3a481a253a1e> | 3.546875 | 965 | Knowledge Article | Science & Tech. | 51.580209 |
Amy Maxmen is a freelance science writer based in New York. She received her PhD in Evolutionary Biology from Harvard in 2006. Follow on Twitter
New Yorkers can catch a fleeting glimpse of Nature’s royalty if they hurry. On Saturday I observed dozens of migrating monarch butterflies – glorious kings of the insect world... | <urn:uuid:0f9c7d5e-5efb-41ce-8f8d-1c39c0643e7b> | 3.046875 | 548 | Personal Blog | Science & Tech. | 45.787714 |
Snapshot 1: it takes five moves to move three cheeses
Snapshot 2: it takes 49 moves to move 10 of 15 cheeses
Snapshot 3: the position after move number 227 with 21 cheeses
It is an unsolved problem in mathematics and computer science to determine the minimum number of moves for all
. For small
, however, the minimum nu... | <urn:uuid:fa095c7e-6a5a-43b5-8433-db9aea047ad0> | 3.515625 | 800 | Tutorial | Science & Tech. | 64.778869 |
This topic describes the syntax of class data fields declarations.
A field is like a variable that belongs to an object. Fields can be of any type, including class types. (That is, fields can hold object references.) Fields are usually private.
To define a field member of a class, simply declare the field as you would ... | <urn:uuid:adae7197-4311-4e70-9ace-d0664e6c58b7> | 3.375 | 723 | Documentation | Software Dev. | 52.303929 |
partial objects are callable objects created by partial(). They have three read-only attributes:
partial objects are like function objects in that they are callable, weak referencable, and can have attributes. There are some important differences. For instance, the __name__ and __doc__ attributes are not created automa... | <urn:uuid:6c36485a-2297-4da7-b4ec-41c3add776f9> | 2.6875 | 101 | Documentation | Software Dev. | 26.669103 |
Comprehensive DescriptionRead full entry
BiologyAdults occur in steep outer reef, occasionally in deep lagoons and along channel walls, usually in current prone habitats and where there are abundant gorgonian and long sea-whip corals on which they lay and guard eggs. Juveniles in small groups often found among large se... | <urn:uuid:27b20ec1-180d-47ca-9813-9de8efe13481> | 2.890625 | 127 | Knowledge Article | Science & Tech. | 57.309 |
Type Ia supernovae are caused by a completely different mechanism than the more well-known type II supernovae. Type Ia supernovae occur in a multiple (usually binary) star system, where one of the stars is a white dwarf. The white dwarf creates a strong gravitational field, and if its companion star is close enough, it... | <urn:uuid:c0a61700-0b6f-4667-ab6b-9f53b4fcbf1e> | 4.125 | 383 | Knowledge Article | Science & Tech. | 40.347472 |
|The change in motion
is proportional to the motive force impressed; and is made in the direction of the right
[straight] line in which that force is impressed. Hence, p is parallel to Fav and
putting it all together symbolically, we have:
Fav = p/t
The average net force equals the time-rate-of
change of momentum. It i... | <urn:uuid:d58964e7-b4ef-4944-9e77-23fc20f8debc> | 3.8125 | 211 | Knowledge Article | Science & Tech. | 37.072601 |
Matter/Anti-matter and Black Holes
If Matter and Anti- matter are oppsite, then would dense
anti-matter create anti-gravity,and would superdense anti-matter create
the oppsite of a black hole?
Matter and anti-matter are made of opposite particles, but these opposite
particles do not have negative masses. An electron an... | <urn:uuid:72b2ea7a-cd70-4473-8371-83a411464be5> | 3.296875 | 132 | Knowledge Article | Science & Tech. | 27.163913 |
After a decade-long hunt almost as obsessive as Captain Ahab’s search for Moby Dick, a team of researchers and journalists from Japan’s National Science Museum, the Discovery Channel, and Japanese broadcaster NHK have captured video of the mysterious giant squid in its natural habitat, about 9 miles from ChiChi Isl... | <urn:uuid:e42e11e3-494c-49cb-a9e8-19fa5c84dd3f> | 2.84375 | 2,026 | Content Listing | Science & Tech. | 47.356644 |