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Ever wondered how web maps are created? Ever wondered if you
could build something like Google Maps over a weekend? You
probably can't, but this talk will show you the basics of
what you need to know, such as importing data, rendering
maps and even building simple routes. And all of this in
* Learning how OSM data look... | <urn:uuid:5ccf798e-03c1-47fa-a306-35e863dfe7ed> | 2.890625 | 235 | Content Listing | Software Dev. | 45.987368 |
Find information on common issues.
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Graphene is a one-atom-thick planar sheet of sp2-bonded carbon atoms that are densely packed in a honeycomb crystal lattice. The term Graphene was coined as a c... | <urn:uuid:1a7625c4-4870-4e5c-ac30-bf972c9ea767> | 3.25 | 304 | Content Listing | Science & Tech. | 35.301429 |
This is the first in a series of group posts by a few of us bloggers interested in the science of climate change. For our first “mob” post, Tamino at Open Mind, Eli at Rabbet Run and yours truly here at Maribo are all writing about the carbon cycle and atmospheric carbon dioxide.
Much of the discussion on Maribo center... | <urn:uuid:80a4bf6d-847b-4883-9429-68ab8d010523> | 3.46875 | 1,386 | Personal Blog | Science & Tech. | 39.158152 |
Helen Michel and Frank Asaro with Walter and Luis Alvarez.
The results of the iridium analysis were quite clear and completely surprising. The team (which also included chemists Helen Michel and Frank Asaro) found three parts iridium per billion more than 30 times what they had expected based on either of their hypothe... | <urn:uuid:3cc0ccd3-5fff-458b-a508-cbafd4ca2d53> | 3.609375 | 373 | Academic Writing | Science & Tech. | 39.633239 |
The Profile class of module profile was written so that derived classes could be developed to extend the profiler. Rather than describing all the details of such an effort, I'll just present the following two examples of derived classes that can be used to do profiling. If the reader is an avid Python programmer, then ... | <urn:uuid:221f6f52-6192-4a02-bc6a-8bcd00cad645> | 2.71875 | 342 | Documentation | Software Dev. | 52.602803 |
We experimented with wireless power transmission. Using copper coils, power can be transmitted several feet in all directions efficiently. A pair of coils will exchange energy while having little effect on other objects around them. Our project builds off the ideas of Nikola Tesla and a research team at MIT. This resea... | <urn:uuid:00b257c2-dd2a-4f8a-b481-54fcdaf5fbd5> | 3.8125 | 1,425 | Academic Writing | Science & Tech. | 41.539015 |
This is a struct. The kind of struct is an "edge".
It has three member variables. They are integers. They are named p, q and cost.
It has one member function. A constructor. To create an object of type edge, you will have to use that constructor. The constructor provides default values, so if you don't provide any vari... | <urn:uuid:35a83c23-ed79-4b07-a6e9-cf5ef89a8c17> | 3.53125 | 179 | Q&A Forum | Software Dev. | 65.734888 |
Public Function IsConsonant( _
ByVal vCharCode As Integer _
) As Boolean
Return True if the character with ASCII value vCharCode is a consonant. Examples:
The pre-programmed definitions for the ANSI Windows character set consider consonants to be those alphabetic characters which are not considered vowels.
IsConsonant(... | <urn:uuid:efeff871-9064-43bb-b0ea-8aa867b74065> | 3.046875 | 181 | Documentation | Software Dev. | 32.184634 |
This section briefly introduces some concepts important to Sather that the reader may not have been exposed to in C++. It isn't meant as a complete language tutorial. More information of a tutorial nature is available from the WWW page:
S. Burson, "The Nightmare of C++", Advanced Systems November 1994, pp. 57-62. Exce... | <urn:uuid:6f97a907-9701-4a6b-ae0e-dd7e0e651ab3> | 3 | 161 | Tutorial | Software Dev. | 51.955831 |
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Applying The Barometer To Weather Watching
You have a barometer. How can you use it as a weather watching aid? Here are a few tips, not an exhaustive list because I know there are others that might be i... | <urn:uuid:dc0103fc-1328-4387-9200-11f240e254da> | 3.078125 | 1,518 | Tutorial | Science & Tech. | 47.472685 |
Risso's Dolphins, Grampus griseus
Taxonomy Animalia Chordata Mammalia Cetacea Delphinidae Grampus griseus
Description & Behavior
Risso's dolphins, Grampus griseus (G. Cuvier, 1812), aka Grampus, are rather large cetaceans with rounded heads, similar in shape to pilot whales. They have a characteristic crease in their m... | <urn:uuid:e93f3ad1-f1e5-4b60-ad81-243ae982b78c> | 3.5 | 1,081 | Knowledge Article | Science & Tech. | 40.008186 |
In these objects, most atoms are ionised by photons from hot stars embedded within the nebular gas, stripping away electrons. The emitted electrons, (called photoelectrons), may collide with atoms or ions within the gas, and excite them. When these excited atoms or ions revert to their ground state, they will emit a ph... | <urn:uuid:14a210a2-8d27-4bb0-826d-7732cd9533c8> | 4.03125 | 315 | Content Listing | Science & Tech. | 36.985615 |
New Species in Indonesia
A group of scientists, exploring the forests of Indonesia in the remote mountains of Foggia, found a wide variety of animal species, including several completely new ones.
International and Indonesian scientists have found that forest wallabies – the smallest member of the kangaroo family in th... | <urn:uuid:438db8ce-599b-4998-bcb9-30b8174f7f4b> | 2.828125 | 263 | Knowledge Article | Science & Tech. | 47.207273 |
Jan. 13, 2010 Forests in northern areas are stunted, verging on the edge of survival. It has been anticipated that climate change improves their growth conditions. A study published in Forest Ecology and Management journal shows that due to their genetic characteristics trees are unable to properly benefit from the len... | <urn:uuid:1c255836-80cb-4dda-998b-93f6886d2949> | 3.96875 | 500 | Truncated | Science & Tech. | 27.397727 |
DEVELOPMENT AND USE OF MITE RESISTANCE TRAITS IN HONEY BEE BREEDING
Location: Honey Bee Breeding, Genetics, and Physiology Research
Title: Honey Bee (Hymenoptera: Apidae) with the Trait of Varroa Sensitive Hygiene Remove Brood with All Reproductive Stages of Varroa Mites (Mesostigmata: Varroidae)
Submitted to: Annals o... | <urn:uuid:8f3fa480-8b8a-4e61-842e-4fe5bd58cd1b> | 3.328125 | 1,091 | Academic Writing | Science & Tech. | 37.018889 |
The blue-eyed darner is a large darner dragonfly that is typically found in western portions of North America, Central America, and northern South America. In North America it ranges west from the Dakotas and north up in to central Canada. It appears as though this species may be extending its range east as we have fou... | <urn:uuid:0fb43317-77d3-41cc-a13b-02ff41a59f71> | 2.8125 | 204 | Personal Blog | Science & Tech. | 55.29603 |
Meteorites hold a record of the chemicals that existed in the early Solar System and that may have been a crucial source of the organic compounds that gave rise to life on Earth. Since the 1960s, scientists have been trying to find proof that nucleobases, the building blocks of our genetic material, came to Earth on me... | <urn:uuid:bf0765d7-d314-4cb0-a52a-0e8014842dbe> | 3.84375 | 242 | Content Listing | Science & Tech. | 22.678814 |
EARTH SCIENCE LAB
Volcanic Materials Identification
Volcanic Lava Flows and Pyroclastic Materials
Volcanic materials are divided into two main groups: Pyroclastic materials and lava flow materials. Below is a list of the various volcanic material definitions describing the general characteristics of those materials, an... | <urn:uuid:304d8956-7ae8-44c6-9e98-0f904572542a> | 4.0625 | 1,776 | Tutorial | Science & Tech. | 35.56 |
Dr Kathy Townsend from Turtles in Trouble with the debris extracted from a coastal sub-adult flat back turtle in Moreton Bay, Australia. Much of this was plastic bag remnants.
To kill a whale
During the 1980s, a technique was being developed by the US navy to detect submarines - a sonar, which unlike regular sonars (wh... | <urn:uuid:a63a6c3d-5873-40b7-807f-b0d386a41966> | 3.65625 | 302 | Personal Blog | Science & Tech. | 42.184877 |
Prove that if , then
I know how to find , but I don't understand how to find , or that that will be less than b.
Can this even be proved? It doesn't appear to be true.
Here's a geometric proof.
If we try to construct a square equal in area to a given rectangle and the
dimensions of the rectangle are a and b, then the p... | <urn:uuid:29bf0108-5bb3-4b6b-a6b2-dedf46035aa8> | 3.234375 | 328 | Comment Section | Science & Tech. | 66.566875 |
Learn more physics!
why in photoelectric effect an electron absorbs only one photon.
- sachin (age 16)
In principle you can have absorption of multiple photons in the photoelectric effect. In practice the probability is very very small under ordinary circumstances. If you had a strong enough laser beam you could probab... | <urn:uuid:02860aae-2f70-4148-8fa7-6f7ce6352843> | 3.171875 | 131 | Q&A Forum | Science & Tech. | 45.574615 |
My Blogs (olelog) are mainly based on my daily reading of earth science news.
Here on whatonearth.olehnielsen.dk I try to weave some of the pieces together to a greater whole with added background info.
A triple junction is the point where the boundaries between three tectonic plates, and three plate margins, meet. At ... | <urn:uuid:b0f42cfb-6771-4706-8a39-71fee444d9e9> | 3.703125 | 1,186 | Personal Blog | Science & Tech. | 49.935474 |
or marine power
(also sometimes referred to as ocean energy
or ocean power
) refers to the energy carried by ocean waves, tide
Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the moon and the sun and the rotation of the Earth....
Salinity is the saltiness ... | <urn:uuid:0d7366b5-2ed8-413b-bfe8-c53a43d51533> | 3.46875 | 1,723 | Knowledge Article | Science & Tech. | 34.745245 |
Science Fair Project Encyclopedia
In Greek mythology, Stentor was a herald on the Greek side during the Trojan War. His name has given rise to the adjective "stentorian", meaning loud-voiced, for which he was famous. See the Iliad, V, 783.
In biology, Stentor is a genus of ciliate protozoa, representative of the hetero... | <urn:uuid:cc925643-acf8-4e90-a945-e9a239115b5d> | 3.296875 | 196 | Knowledge Article | Science & Tech. | 42.762143 |
The autoDtd program creates a DTD file from an XML file example. The program also generates an "attributed tree" and a summary of the actual data in the file.
Listing Four (available electronically) shows the DTD autoDtd generates from the XML file in Listing One. It starts out by defining XML entities to represent num... | <urn:uuid:4587f04a-e0af-45b3-97e8-2c580e124d7a> | 3.0625 | 452 | Documentation | Software Dev. | 51.799347 |
The In-place Hybrid MSD N-bit-Radix Sort I presented in In-place Hybrid N-bit-Radix Sort was developed as a combination of Radix Sort, Insertion Sort, and Counting Sort. This algorithm sorts arrays of integers (8, 16, 32, and 64-bit, unsigned and signed), and significantly outperforms STL sort(), which is a hybrid comb... | <urn:uuid:01e14fa4-4dc4-4ad9-a2a0-5f6a9bb5848b> | 2.8125 | 634 | Documentation | Software Dev. | 49.987037 |
Vestas V164 is the world’s largest ocean wind turbine
In 1919 a German physicist Albert Betz had concluded that no wind turbine can convert more than 59.3% of the kinetic energy of the wind into mechanical energy turning a rotor. Today this is known as Betz Limit or Betz Law.
However, the same maximum result was obtain... | <urn:uuid:768d7a1e-96c2-4ef9-8bf7-335d45098711> | 3.625 | 670 | Knowledge Article | Science & Tech. | 55.18964 |
ANSI Common Lisp 7 Objects 7.1 Object Creation and Initialization
The generic function shared-initialize is used to fill the
of an instance
using initialization arguments and :initform
forms when an instance is created, when an
instance is re-initialized,
when an instance
is updated to conform to a redefined class, and... | <urn:uuid:f8b38d3c-c52b-44a8-9f0c-095969854ca9> | 2.78125 | 514 | Documentation | Software Dev. | 35.468944 |
BLACK SMOKER CHIMNEY ROCKS
Some of the most inaccessible rocks on Planet Earth are on the seafloor, at mid-ocean ridges (spreading centers, where two tectonic plates are separating). Seafloor hydrothermal vents at mid-ocean ridges were first discovered back in the 1970s, but they still demand much awe and wonder.
Near ... | <urn:uuid:564bbe0e-de9c-4570-83c0-c34a1431ebd1> | 3.703125 | 576 | Knowledge Article | Science & Tech. | 36.171378 |
IT'S dog eat dogor more properly jelly eat jellyin the Black Sea. The latest comb jelly to arrive is gobbling up an earlier invader that ran riot when it reached the sea in the 1980s, wrecking its ecology.
The seeds of disaster were sown in the 1970s as increasing salinity, pollution and overfishing began to bite. "The... | <urn:uuid:15fe9892-23c0-4848-9f35-2f86f02148dd> | 2.703125 | 140 | Truncated | Science & Tech. | 53.532298 |
Malagopsis doggeri has no common name, which is true of more than 90% of insect species.
Malagopsis doggeri is just one of hundreds of thousands of parasitic wasps, and despite its bright coloration and relatively large size, it was only discovered in 2003. The species was named after the senior authors pet dog.
The im... | <urn:uuid:ce27f5a8-c78c-491f-b97b-83595e327880> | 3.21875 | 280 | Knowledge Article | Science & Tech. | 29.257687 |
Nitrogen becomes artificial fertilizer
In the Haber-Bosch process nitrogen is extracted from the air to form ammonia. This is an important stage in the production of artificial fertilizers and the process won Fritz Haber the 1918 Nobel Prize in Chemistry. Even though the chemical process has been known for a long time,... | <urn:uuid:4cff28c1-c990-43bf-98f1-5364ecbdb6cb> | 3.421875 | 148 | Knowledge Article | Science & Tech. | 41.162857 |
That's the sound of steam bursting from the Earth at Nevada Geothermal's Blue Mountain project. Harnessing the earth's heat to generate electricity has long been an overlooked renewable resource, despite having produced power reliably in Italy since 1904.
You see, the Earth's heat never stops—meaning a geothermal power... | <urn:uuid:5f317f2e-7283-400c-b9e5-15e26605ec24> | 3.53125 | 246 | Truncated | Science & Tech. | 55.652229 |
In an electrolytic cell electrical energyA system's capacity to do work. is consumed and an otherwise spontaneous redox reaction is reversed. A galvanic cellAn electrochemical cell in which a spontaneous reaction occurs. Such a cell can be used to generate electricity. Also called voltaic cell., on the other hand, prod... | <urn:uuid:01800929-e7e1-424b-ad40-59c91660faa7> | 2.984375 | 1,552 | Tutorial | Science & Tech. | 44.531538 |
|A water beetle Rhantus suturalis on bare new pond-liner - its breathing air-bubble is visible at its rear.|
|Beetle larva in side view|
|Beetle larva in dorsal view|
Again, I haven't identified this larva (yet) though it does look like Rhantus, maybe a smallish early stage - time will tell, but there are several which... | <urn:uuid:a88502c2-0f32-4d62-a24f-4565b1df232d> | 2.8125 | 422 | Personal Blog | Science & Tech. | 57.533893 |
A generator expression is a compact generator notation in parentheses:
A generator expression yields a new generator object. It consists of a single expression followed by at least one for clause and zero or more for or if clauses. The iterating values of the new generator are those that would be produced by considerin... | <urn:uuid:c3cdc251-b76c-497e-9453-50a1a028e86d> | 3.609375 | 234 | Documentation | Software Dev. | 46.455182 |
Energy in 3 consecutive forms: potential, kinetic, internal (Photo credit: Wikipedia)
A rock has potential energy (PE) localized in it when you lift it up above the ground. The rock is the system; everything else it encounters is the surroundings. Drop the rock and its PE changes to kinetic energy (energy of movement, ... | <urn:uuid:90ba1e84-3a57-4c53-b92c-00216417fef1> | 3.890625 | 1,837 | Personal Blog | Science & Tech. | 28.841721 |
Our first step was to come up with questions to answer. Then we used the State Climate Office (SCO) database to find information about tornadoes.
After we found out about the locations, dates, and magnitude of the tornadoes, we used a software find the locations of hurricane tracks.
Using this information, we matched t... | <urn:uuid:ff8af28d-b7c5-40fa-81c7-e4da94cc0d2c> | 2.765625 | 92 | Audio Transcript | Science & Tech. | 46.021304 |
In the diagram the point P' can move to different places along the
dotted line. Each position P' takes will fix a corresponding
position for P. If P' moves along a straight line what does P do ?
In the diagram the point P can move to different places around the
dotted circle. Each position P takes will fix a correspond... | <urn:uuid:b67eb3e8-9290-46af-b938-723034ed3b43> | 4.0625 | 357 | Q&A Forum | Science & Tech. | 68.386316 |
A personal investigation of Conway's Rational Tangles. What were
the interesting questions that needed to be asked, and where did
Label the joints and legs of these graph theory caterpillars so that the vertex sums are all equal.
Find all the ways of placing the numbers 1 to 9 on a W shape, with
3 numbers on each leg, ... | <urn:uuid:b810c489-44a1-4352-9650-a1b1d72aae6c> | 3.09375 | 906 | Content Listing | Science & Tech. | 58.077562 |
October 2, 2009
A red-black tree is a data structure, similar to a binary tree, which is always approximately balanced, so that individual insert and lookup operations take only O(log n) time. Red-black trees are popular because of their good performance and the relative simplicity of their balancing operations. Our di... | <urn:uuid:d3da7cd3-bde7-405b-b23f-6619758340bc> | 3.609375 | 463 | Tutorial | Software Dev. | 50.993235 |
NEWS > SCIENCE > SCIENTISTS FINALLY MAKE A SMART MOVE BY GIVING ROBOTS BEE BRAINS RATHER THAN HUMAN ONES
SCIENTISTS FINALLY MAKE A SMART MOVE BY GIVING ROBOTS BEE BRAINS RATHER THAN HUMAN ONES
October 3 2012
Sheffield, U.K. – Throughout the years there have been many nightmare scenarios depicted in fiction that show th... | <urn:uuid:2d609341-aea4-4d20-95e1-ff699bea6074> | 2.953125 | 771 | Truncated | Science & Tech. | 50.029973 |
Confuciusornis, from the early Cretaceous of China,
is the oldest known beaked bird, and one of the oldest known
birds -- only Archaeopteryx, from the late Jurassic of
Germany, is older. Confuciusornis is a member of the Confuciusornithidae, the sister-group to the clade composed of Enantiornithes + Ornithurae (include... | <urn:uuid:b6fbd010-9a09-4cc7-a474-58845b5af472> | 3.4375 | 478 | Knowledge Article | Science & Tech. | 53.386958 |
Facts about the Definition of the Element Boron The Element Boron is defined as... A soft, brown, amorphous or crystalline nonmetallic element, extracted chiefly from kernite and borax and used in flares, propellant mixtures, nuclear reactor control elements, abrasives, and hard metallic alloys. The most common uses of... | <urn:uuid:513bf739-f958-4b03-9710-d5a524400e8d> | 3.71875 | 790 | Knowledge Article | Science & Tech. | 45.980591 |
It isn't easy to predict exactly when a satellite like UARS will re-enter Earth's atmosphere, since the space it travels through changes density over time due to incoming particles and radiation energy from activity on the sun. Credit: NASA
Solar Activity Can Affect Re-Entry of UARS Satellite
› View larger
The world's ... | <urn:uuid:c03aa946-2ab5-462a-a2f0-2d1d0a6cba8e> | 3.890625 | 675 | Knowledge Article | Science & Tech. | 31.783904 |
Look up monthly U.S., Statewide, Divisional, and Regional Temperature, Precipitation, Degree Days, and Palmer (Drought) rankings for 1-12, 18, 24, 36, 48, 60-month, and Year-to-Date time periods. Data and statistics are as of January 1895.
Please note, Degree Days are not available for Agricultural Belts
Wyoming Temper... | <urn:uuid:54fed444-ba36-49fb-9d8a-232dbbf732b6> | 2.796875 | 140 | Structured Data | Science & Tech. | 51.857104 |
Energy: The Story of the Integral Fast Reactor” by Charles E. Till and Yoon
Chang gives the history of the IFR at
Argonne. The book is now available on Amazon.com…
More about the book
About the authors:
Dr. Charles E. Till, Emeritus Member — National Academy of Engineering (NAE) website
Dr. Yoon Il Chang, Argonne Disti... | <urn:uuid:60382e9a-4830-4434-8e3b-9afed0ac0c5a> | 3.1875 | 1,240 | Knowledge Article | Science & Tech. | 47.977223 |
Scientists have revealed for the first time the genetic information, or genome, of the platypus in the journal Nature today.
This enigmatic and unique animal has a fascinating mix of mammal and reptile characteristics and this research reveals the individual gene groups for these traits.
The results give clues to how t... | <urn:uuid:5b06bce7-9acb-4c7d-8361-e74586f1aa2f> | 3.921875 | 515 | Knowledge Article | Science & Tech. | 34.212392 |
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The concept of water column is quite important, since many aquatic phenomena are explained by the incomplete vertical mixing of chemical, physical or biological parameters. For example, when studying the metabolism of benthic organisms, it is the specific bottom layer concentration of available chemicals in the water c... | <urn:uuid:397eaed8-df5b-4383-8701-b8c8b10b5677> | 3.109375 | 151 | Knowledge Article | Science & Tech. | 23.393571 |
even lend a hand in the synthesis of drugs
and supplements such as vitamin E.
But enzyme-driven processes these
days can get much more involved than
just throwing starting materials into
an animal gut. Often materials need to
undergo additional reactions, treatment
with a solvent or dyeing with a chemical, before or af... | <urn:uuid:c3959ada-bab7-47d5-b9f3-5991b3e574ce> | 3.796875 | 924 | Knowledge Article | Science & Tech. | 41.317239 |
IPCC AR4 Ensemble Statistics
The 20c3m experiments are forced with historical green house gas forcing as well as the time varying ozone, sulfate, volcanic aerosols, and solar output for the 1900-2000 period. This analysis uses 20th century experiments from 10 models. The B1, A1B and A2 experiments are forced with a pre... | <urn:uuid:646c2f2d-bca3-4d70-a51d-c2f802ce0c49> | 3.25 | 392 | Knowledge Article | Science & Tech. | 40.348269 |
Naturally, everybody’s talking about the weather. It been hot and dry and lots of people wonder why.
“Climate change” is the pat answer.
However, one of the meteorologists I follow -- John Wheeler, with WDAY-TV in Fargo, N.D., where I live -- says the summer's heat isn’t the direct result of a warming globe.
“Actually,... | <urn:uuid:c30a6aea-c4b9-4334-995f-e6e674c82eb3> | 2.765625 | 252 | Personal Blog | Science & Tech. | 70.097851 |
19 year old Aisha Mustafa has invented a propulsion device which could very well result in a cheaper means of energy consumption for spacecrafts. What have you done today?
She's a student at Sohag University, and she invented the propulsion device that eschews radioactive based jet and rocket engine set up for quantum ... | <urn:uuid:7739ea6a-7cad-4cdf-92e5-225647bdf9e9> | 3.40625 | 157 | Listicle | Science & Tech. | 31.749678 |
Uljamin, 1884 : Doliolid|
Phylum Chordata / Subphylum Urochordata / Class Thaliacea / Order Doliolida / Family Doliolidae
Using a mucous net, Dolioletta is a very adept filter feeder on particles ranging up to 100 micrometers in size. Gill slits are located within the relatively large pharynx, which also holds the mucu... | <urn:uuid:274239fb-9e66-4cb3-9622-f301f9ab0d94> | 3.125 | 290 | Knowledge Article | Science & Tech. | 29.004049 |
Given a rhombus, as shown on the right, with diagonals of length 2a and 2b, express the area and the side s in terms of a and b.
The area is made up of four right triangles with total area of 2ab.
To find an expression for s consider this figure where the four right triangles from the rhombus are assembled at the verti... | <urn:uuid:34ce27d5-81be-4717-a500-2392a76b1a3d> | 3.8125 | 165 | Tutorial | Science & Tech. | 70.512913 |
Informational Brochures for Parents
Grade level: K 1 2 3 4 5
Introducing Investigations to Families
Investigations Resources for Families
Resources that are components of Investigations that are designed to support families at home. All of these should be coming home with your child at different times throughout the ye... | <urn:uuid:ba52a67c-1f03-49b2-895c-9c951d42bfdb> | 3.6875 | 555 | Content Listing | Science & Tech. | 40.365721 |
On the 40th anniversary of the famous ‘Blue Marble’ photograph taken of Earth from space, Planetary Collective presents a short film documenting astronauts’ life-changing stories of seeing the Earth from the outside – a perspective-altering experience often described as the Overview Effect.
One of the most stunning ISS... | <urn:uuid:f172a3d3-0c65-480e-afd0-b8f58a58c6ff> | 3.3125 | 1,260 | Content Listing | Science & Tech. | 23.083024 |
Acids, Bases, and Indicators
Return to Chemistry Index
Edwin A. Metzl Lincoln Park High School
2001 North Orchard Street Mall
Chicago IL 60614
This is a multileveled approach to learning some of the common
characteristics of acidic and basic solutions and use of some of the
Apron Distilled water
Safety goggles 200 mL 0... | <urn:uuid:17bb61d7-330e-4687-b62a-f5f72c23c3d9> | 3.203125 | 1,000 | Tutorial | Science & Tech. | 60.642547 |
My question is very simple. If frequency is defined as the cylces per unit time, Then what is meant by "Frequency of an Electron" ? If the rotation of electron around a nucleus is considered then, ...
What do we actually mean when we say that matter is a wave? What does the wavelength of this matter wave indicate? The ... | <urn:uuid:82024c57-db8c-43fa-9c9b-3cfff1744c2b> | 2.90625 | 86 | Q&A Forum | Science & Tech. | 59.680819 |
This section illustrates you how to escape all special characters from the given string or text. Here, you can learn the way of detecting all special characters present in the given string.
This section provides an example for the best illustration about the way of matching special characters in the given string or tex... | <urn:uuid:0881bbdf-9a66-4fa2-8b38-84083d1bac52> | 3.390625 | 196 | Documentation | Software Dev. | 54.091585 |
AOH :: SOIL.TXT|
Borderland: Remineralizing the Soil
REMINERALIZING THE SOIL
Most of us are aware that the greenhouse effect is rapidly
becoming a serious threat to our climate. There is widespread
agreement that it is the reason we lost almost one-third of all
our grains in 1988, and were not able to produce enough wh... | <urn:uuid:9f5f5d34-2ad4-4802-b9dc-5ac1eb4726f7> | 3.375 | 1,136 | Knowledge Article | Science & Tech. | 44.11145 |
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(Science: physics) a lens built up, progressively, in zones or steps, each zone with its own individual radius. Considerable spherical correction is attained, an... | <urn:uuid:25587740-27e3-4eae-8d04-f861b52196b0> | 3.109375 | 195 | Structured Data | Science & Tech. | 40.43902 |
Scientists working in Haiti have obtained the first-ever photos of an endangered Black-capped Petrel chick—a little ball of gray fluff that was discovered at its nest inside a mountaintop cave. The finding helps answer questions about this secretive species’ life cycle.
These crow-sized seabirds nest only in the Caribb... | <urn:uuid:eddc00e8-233d-4052-b0ed-4ee8ea31ab45> | 3.109375 | 824 | Knowledge Article | Science & Tech. | 46.558756 |
In order to properly identify and catalog the biodiversity of a site, researchers often have to physically collect specimens by hand for more thorough study in a laboratory. Examples of species are collected by SCUBA divers using nets and collection bottles, and by using devices called suction samplers that act like va... | <urn:uuid:15ae49c7-9bdd-4c15-9541-e904f69de9af> | 3.96875 | 309 | Knowledge Article | Science & Tech. | 23.510909 |
Mud wasps are large, solitary Australian wasps.
Mud wasps: solitary and harmless
Mud wasps are large, solitary Australian insects that build nests of mud and provide live, paralysed prey for their larvae to feed on.
1 October 2008 | Updated 14 October 2011
There are many different species of Australian mud wasps in the... | <urn:uuid:909314c8-344c-4f73-9f18-d8dc3dce6b65> | 3.59375 | 428 | Knowledge Article | Science & Tech. | 59.579767 |
Fusion reactors are being studied as an alternative to fission reactors. The design of nuclear fusion reactors, which are still in the experimental stage, differs considerably from that of fission reactors. In a fusion reactor, the principal problem is the containment of the plasma fuel, which must be at a temperature ... | <urn:uuid:da19a19b-e75e-4024-aa50-d5fe48735f7a> | 4.1875 | 191 | Knowledge Article | Science & Tech. | 29.694909 |
Unicode and Internationalization
The effect of Unicode on Tcl scripts is actually very limited. There is a new backslash sequence, \uXXXX, that specifies a 16-bit Unicode character. There are also facilities to work with character set encodings and message catalogs.
The Tcl I/O system supports character set translation... | <urn:uuid:110b4896-7f2f-4c9e-b3c0-096dda58e8cd> | 2.703125 | 338 | Documentation | Software Dev. | 39.514836 |
Webb Research Corporation, based out of Falmouth, Massachusetts, has invented what it is calling a “Slocum glider.”
The name Slocum comes from Canadian-American seaman and adventurer Joshua Slocum (1844-1909), the first person to make a solo circumnavigation of the world—sail around the world alone (between 1895 and 18... | <urn:uuid:0ab7afe7-1d72-4418-9ff7-f3aefab375c1> | 3.984375 | 585 | Knowledge Article | Science & Tech. | 51.801577 |
We've heard it called many things, a sign of the end of times or as "Armageddon" at the cinema. However asteroids have become a much more publicly aware reality than a scientific phenomenon. Just after sunrise today, an estimated 10 ton meteor flew through the earth's atmosphere at hypersonic speed around 33,000 mph! T... | <urn:uuid:a9a72aa1-7516-4638-a388-bcf0bdbf22a7> | 3.015625 | 1,024 | Personal Blog | Science & Tech. | 60.276644 |
Eight Weeks of Prototype: Week 4, Event Handling in Prototype
I will now show you how to write event handlers when observing events with Prototype. I showed you some basic examples in the previous section of handling some events, but there is more to it than that!
When you define an event handler, the event object is p... | <urn:uuid:9aca3518-7fb9-4d37-9871-4e6017252cf1> | 2.9375 | 188 | Personal Blog | Software Dev. | 43.13 |
Unit tangent vectors, Normal vectors, and Gradients
So I'm kinda new to Physics Forums but I've been using threads as guides for about a year now.
Basically, I'm hardcore studying for my Calc III exam (the final is in a few weeks) and I came across an interesting lapse in my understanding (well many in fact, but one in... | <urn:uuid:74c1e02c-f9dd-4e1a-b28b-19a9d078fbd4> | 2.890625 | 302 | Comment Section | Science & Tech. | 58.959265 |
Text starting in column 1 or more is formatted using fixed font.
Text placed between <pre></pre> tags is treated as "verbatim" and left unformatted.
A URL coded "bare" becomes a link based on its own text:
A bare URL for an image of type gif, png or jpg becomes an inline image:
A URL like:
[http://www.transcoding.org T... | <urn:uuid:219a9847-406c-4a36-85e2-863963501b72> | 2.6875 | 587 | Structured Data | Software Dev. | 81.017516 |
Country of Origin: United States of America
Approximate: 198.12 x 271.78 x 210.82cm (6ft 6in. x 8ft 11in. x 6ft 11in.)
Wood, mylar, and plastics
New Horizons will be the first spacecraft to visit Pluto and the Kuiper Belt in the outer solar system. It was launched aboard an Atlas V rocket from Cape Canaveral Air Force ... | <urn:uuid:afb979b4-2779-4a45-9b88-abb032b00fb1> | 2.6875 | 259 | Knowledge Article | Science & Tech. | 52.356842 |
The cell is a fundamental component of our modern definition of life and living things. Cells are regarded as the basic building blocks of life and are used in the elusive definition of what it means to be 'alive'.
Let's take a look at one definition of life:
"Living things are chemical organizations composed of cells ... | <urn:uuid:b3da68dd-ba02-408b-b00a-2e22f5213114> | 3.828125 | 560 | Knowledge Article | Science & Tech. | 23.213683 |
Settling first in New York City and then in Leonia, N.J., Fermi began his new life at Columbia University, in New York City. Within weeks of his arrival, news that uranium could fission astounded the physics community. Scientists had known for many years that nuclei could disgorge small chunks, such as alpha particles,... | <urn:uuid:5548aed9-feca-4e08-a7f2-31a364268088> | 3.84375 | 1,173 | Knowledge Article | Science & Tech. | 42.171362 |
This true-color satellite image shows a large phytoplankton bloom, several hundred square kilometers in size, in the Indian Ocean off the west coast of Tasmania. In this scene, the rich concentration of microscopic marine plants gives the water a lighter, more turquoise appearance which helps to highlight the current p... | <urn:uuid:92c48474-1b8b-49a9-a067-2409bc5025d9> | 4.0625 | 246 | Knowledge Article | Science & Tech. | 37.864733 |
The ECL implementation of strings is ANSI Common-Lisp compliant. There are basically four string types as shown in Table 14.1. As explained in Chapter 11, when Unicode support is disabled, character and base-character are the same type and the last two string types are equivalent to the first two.
Table 14.1. Common Li... | <urn:uuid:e3c47ff5-d5f8-4768-b8e0-9613819f943a> | 2.921875 | 224 | Documentation | Software Dev. | 54.995113 |
In some respects, science is so far advanced that something the experts consider trivial is astonishing to the public. For a long time, many decades, we've routinely monitored the Earth's daily rotation to within tiny fractions of a second. But nobody notices until the planet gets a little off, and the clocks need to b... | <urn:uuid:48e3ae89-5e98-44ec-9715-3068479df075> | 2.90625 | 214 | Personal Blog | Science & Tech. | 46.086174 |
C. Kinematics And Dynamics
C3. First Law Of Motion
Inertia - Masses Hanging In Series
To demonstrate inertia of rest in a counterintuitive way.
Stand with two weights, three strings, and a pulling bar (hanging from the lowest string), as photographed.
Ask your students to vote before doing the experiment; then break th... | <urn:uuid:a0e9fb82-ea5e-4003-9a11-ee3cdbc59736> | 3.984375 | 395 | Tutorial | Science & Tech. | 76.161793 |
Herman Melville’s Moby Dick may paint a picture of the sperm whale as a terrifying, ferocious creature that destroys ships and attacks the sailors on them, but modern research shows that sperm whales are compassionate and social creatures, dangerous only to the fish and squid that the giant whale feasts on for dinner... | <urn:uuid:7016fb8b-cdbf-4a1d-a51e-3b4be2542cf8> | 3.453125 | 434 | Personal Blog | Science & Tech. | 41.230547 |
This is an important question, because it is thought to be due to temperature, convection and radiative physics. But what about other possible factors? I’ve started gathering a list and some notes for discussion on the excellent and still very active Clive Best lapse rate thread. Regulars know that when a post title co... | <urn:uuid:6bb15839-2f18-46f4-82ca-8e1aa1c24f22> | 3.53125 | 995 | Comment Section | Science & Tech. | 54.738928 |
|This is a stub or unfinished. Contribute by editing me.|
A hash table is a dictionary-like data structure that provides O(1) lookup time. You associate keys with values (e.g. a dictionary associates words with definitions). Often a hash table is implemented using a hash function and an ordinary array. Collisions (when... | <urn:uuid:be8a389e-19b6-4d70-8ae2-7271c0b92a2f> | 3.765625 | 764 | Knowledge Article | Software Dev. | 50.146356 |
C# is an object-oriented programming language developed by Microsoft Corporation . C# source code as well as those of other .NET languages is compiled into an intermediate byte code called Microsoft Intermediate Langauge. C# is primarily derived from the C, C++, and Java programming languages with some features of Micr... | <urn:uuid:49069a38-0a2c-4113-a354-c3e03c9de2fb> | 3.40625 | 789 | Knowledge Article | Software Dev. | 27.063054 |
Inspired by my visit to the Kennedy Space Center and the large amount of information NASA gave me on the new Constellation Space Program. We are going to do a series of articles on the new space problem as it progresses.
These articles will delve into what the Constellation Program will consist of in terms of technolog... | <urn:uuid:96fa045e-ae1a-442a-84a8-76cd88e2f072> | 3.234375 | 1,494 | Comment Section | Science & Tech. | 52.120301 |
Joined: 16 Mar 2004
|Posted: Mon Jul 14, 2008 11:11 am Post subject: Superbugs, shapes and nanotechnology
|September 2007 - Society for General Microbiology
Superbugs, shapes and nanotechnology
A common hospital superbug called Clostridium has a protective coat of armour that can self assemble when put into a test tube... | <urn:uuid:15a2edaf-2dcd-4791-a912-2fb04312010f> | 3.109375 | 397 | Comment Section | Science & Tech. | 27.042067 |
Hydrology - Groundwater
Become more familiar with groundwater and some of the issues that influence it. You will start to think beyond the water that you can see and move into more complex ideas such as pollution and caves. You will use the internet to help you gain knowledge as well as doing hands-on activities.
Did Y... | <urn:uuid:cd81489a-4c38-46cc-8bfe-04080181486f> | 3.015625 | 124 | Knowledge Article | Science & Tech. | 54.987642 |
One Day's Temperature Map
October 20, 2009
The Thermal Emission Spectrometer on NASA's Mars Global Surveyor provided the first systematic study of Martian weather. For three Mars years, TES operated much like a terrestrial weather satellite, making daily weather maps to track changes in atmospheric temperature, water-i... | <urn:uuid:31ef9da5-5f03-425d-97f2-0228ae60a141> | 3.0625 | 121 | Truncated | Science & Tech. | 27.785798 |
John Dreher wrote:However I fear that the mechanics of the collision between two rolling spheres, with allowance for the assumed interaction at the contact point of the impact with regards to friction, puts the theoretical basis well beyond grade 6-8 level
With an appropriate choice of hypothesis and initial test condi... | <urn:uuid:53a5382f-13f1-4455-a9e7-21cf83925459> | 2.984375 | 691 | Comment Section | Science & Tech. | 43.349025 |
Why is southern sea ice increasing?
What the science says...
|Select a level...||Basic||Intermediate|
|Antarctic sea ice has grown in recent decades despite the Southern Ocean warming at the same time.|
First of all, it’s worth remembering that sea ice is not to be confused with land ice. This distinction might seem ob... | <urn:uuid:c12198e2-ccf6-4461-a3a0-75364abfa644> | 3.46875 | 458 | Knowledge Article | Science & Tech. | 55.117307 |
7. Linked tables and relationships
The previous page has a picture showing two tables with related fields. These are depicted graphically as a line between them.
The line between the fields has a '1' on one side and the infinity sign on the other. In Access this indicates a 'one-to-many' relationship. This is described... | <urn:uuid:fd4d3433-2b30-435e-93ac-4d53a1ca3a5d> | 3.25 | 146 | Tutorial | Software Dev. | 51.537261 |
It's often said -- occasionally even by us -- that we currently know of but a single ecosystem, our own, with no other data points for reference. That's not precisely true. Although we know of no other naturally-occuring ecosystem (yet), it is possible to construct self-contained ecologies, receiving no input other tha... | <urn:uuid:5e37f153-825b-4cd4-8b52-35cf5d58b595> | 2.90625 | 1,464 | Comment Section | Science & Tech. | 52.153885 |
Scientists will grapple ‘for years’ to best understand the whys and wherefores of a four-day rapid melting affecting 97 percent of Greenland’s enormous ice sheet. ‘Weird’ in a number of ways … but precise role of global warming remains to be determined.
That startlingly rapid four-day widespread melt of Greenland’s mas... | <urn:uuid:0193864d-7787-4d4a-a663-3841123a56cf> | 3.578125 | 1,363 | Comment Section | Science & Tech. | 48.391448 |
Biology of Australia
Scorpions are the oldest known land animal, and were possibly the first to invade the land. In Australia the arid zone has more species of scorpion than any other subregion.
Urodocua is the endemic genus of Australian scorpion, with 11 species. Unlike other scorpions, the members of this genus digs... | <urn:uuid:6e1b8b53-0e32-4d67-b78d-05ce8ef3c69c> | 3.625 | 195 | Knowledge Article | Science & Tech. | 42.537163 |
event library provides functions for understanding an event and the environment in which it was raised as well as actions for sending events.
There are three categories of event functions.
For historical reasons, some of these are Web-centric. The following functions are available:
event:env()- returns information abou... | <urn:uuid:ee88fbd6-a27d-4b7c-8914-e76a70525620> | 2.828125 | 885 | Documentation | Software Dev. | 40.535283 |
You can use the Refactoring feature to create variables and fields. This feature allows you to create and declare variables and fields while coding without planning ahead. This topic includes information about:
You can create a variable when you have an undeclared identifier that exists within a procedure block scope. ... | <urn:uuid:28fabace-4568-4fa0-93d7-8d8d052aad78> | 3.03125 | 661 | Documentation | Software Dev. | 39.773241 |
While it is true that modern multi-stage nuclear weapons utilize tritium as a D-T fusion fuel, it is only half true that we are limited to one half-life cycle and untrue that you can only 'make' tritium in Fast Breeder Reactors.
The United States has a large stock of decommissioned nuclear weapons. These have been remo... | <urn:uuid:e5f9e9ec-52e6-47e1-a0fb-f07c687129b2> | 3.0625 | 496 | Knowledge Article | Science & Tech. | 43.61694 |
Chapter 5: Natural selection
"Nothing in biology makes sense except in light of evolution" - Theodosius Dobzhansky (1973)
Understanding natural selection is crucial to understanding wildlife ecology and practically any other topic in biology. This chapter gives you the basic concepts of natural selection so that you wi... | <urn:uuid:50fb9d80-95f6-481d-979e-1b9b42d42ca0> | 4.25 | 2,004 | Knowledge Article | Science & Tech. | 35.632904 |
Advanced Nuclear Power Reactors
(Updated October 2011)
- The next two generations of nuclear reactors are currently being developed in several countries.
- The first (3rd generation) advanced reactors have been operating in Japan since 1996. Late 3rd generation designs are now being built.
- Newer advanced reactors hav... | <urn:uuid:4ecff0f5-3983-4316-bddd-48de140cf166> | 3.171875 | 289 | Knowledge Article | Science & Tech. | 31.34448 |
"Prospero was the first UK satellite to be launched on a UK launch vehicle; it would also be the last. Ministers had cancelled the rocket project in the run up to the flight. However, as the Black Arrow was ready, the programme team decided to go-ahead anyway. Prospero was blasted into orbit from the remote Woomera bas... | <urn:uuid:8ee09799-9b9d-46b9-b199-8ac2288b7416> | 3.046875 | 273 | Truncated | Science & Tech. | 45.570329 |