text large_stringlengths 148 17k | id large_stringlengths 47 47 | score float64 2.69 5.31 | tokens int64 36 7.79k | format large_stringclasses 13
values | topic large_stringclasses 2
values | fr_ease float64 20 157 |
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JSON: Writing Output
July 15, 2011
In the previous exercise we wrote a function to read JSON input and parse it into an object in the native language. In today’s exercise we write the inverse function.
Your task is to write a function that takes a JSON object and writes it in text format. When you are finished, you are... | <urn:uuid:bcad628a-425a-489a-bd3d-d118243215e0> | 2.8125 | 101 | Tutorial | Software Dev. | 56.145058 |
.f the number gets interpreted as an integer, hence
(int)0 instead of the desired
.f tells the compiler to interpret the literal as a floating point number of type float. There are other such constructs such as for example
0UL which means a
(unsigned long)0, whereas a plain
0 would be an
.f is actually two components, ... | <urn:uuid:31c1d47e-10ff-40bd-8704-b18a373aadea> | 3.90625 | 315 | Q&A Forum | Software Dev. | 58.949945 |
The world’s astronomers, under the auspices of the International Astronomical Union (IAU), have concluded two years of work defining the lower end of the planet scale - what defines the difference between “planets” and “solar system bodies”. If the definition is approved by the astronomers gathered 14-25 August 2006 at... | <urn:uuid:a8956ae6-f876-4130-84cd-1b10b82a8884> | 3.4375 | 879 | Personal Blog | Science & Tech. | 56.508961 |
Episode 411: Describing magnetic fields
The field around a permanent magnet should be familiar to your students. In practice, where we want a controllable field, we use electromagnets. In this episode, students learn about these fields and the factors that determine their strength and direction.
- Demonstration and dis... | <urn:uuid:27d4c0bc-fa2a-4147-95af-9ec3618afdbd> | 4.5 | 1,222 | Truncated | Science & Tech. | 43.370235 |
Temporary satellites are a result of the gravitational pull of Earth and the Moon. Both bodies pull on one another and also pull on anything else in nearby space. The most common objects that get pulled in by the Earth-Moon system’s gravity are near Earth objects (NEOs) — comets and asteroids are nudged by the outer pl... | <urn:uuid:84846220-55ba-47ca-8208-b07580b3e2ea> | 4.28125 | 226 | Personal Blog | Science & Tech. | 59.892482 |
Let’s look at the dimensions of antisymmetric tensor spaces. We worked out that if has dimension , then the space of antisymmetric tensors with tensorands has dimension
One thing should leap out about this: if is greater than , then the dimension formula breaks down. This is connected with the fact that at that point w... | <urn:uuid:a8b322de-ba95-474e-80fa-1f30b242362e> | 2.953125 | 363 | Personal Blog | Science & Tech. | 46.745625 |
Red-crowned roofed turtle (Batagur kachuga)
|Also known as:||Bengal roof turtle|
|Synonyms:||Emys kachuga, Emys lineata, Kachuga kachuga|
The red-crowned roofed turtle is classified as Critically Endangered (CR) on the IUCN Red List (1).
Information on the red-crowned roofed turtle (Batagur kachuga) is being researched... | <urn:uuid:da7d112b-5968-4d29-8c50-4d211ad31708> | 2.75 | 154 | Knowledge Article | Science & Tech. | 27.787255 |
What is ASP.NET?
Y'know, a lot of people talk about ASP.NET, but it's surprisingly hard to find a clear and coherent definition of exactly what it is and how it fits into the world of Web development. Fortunately, Wikipedia has a very nice definition:
"ASP.NET is a set of web development technologies marketed by Micros... | <urn:uuid:ccdbd13d-9aa9-45ba-a9a8-cfba9e2aa39a> | 3.0625 | 1,033 | Q&A Forum | Software Dev. | 62.53971 |
Simply begin typing or use the editing tools above to add to this article.
Once you are finished and click submit, your modifications will be sent to our editors for review.
discovery of photovoltaic effect
The development of solar cell technology stems from the work of the French physicist Antoine-César Becquerel in 1... | <urn:uuid:db9f1f7a-ddf9-4644-b0c8-923d09dc7a97> | 3.46875 | 151 | Knowledge Article | Science & Tech. | 40.771768 |
Rocking movement in the anti-stress protein Hsp90
Proteins are the motors of the cell: They transport, among other things, nutrients, move our muscles, convert substances chemically or fold other proteins. The so-called heat shock protein Hsp90 is eminently important for our cells since it plays a decisive role in many... | <urn:uuid:9f888fe6-2a42-43d1-84fa-7014a3161296> | 3.265625 | 834 | Academic Writing | Science & Tech. | 43.621572 |
AFAIK, Windows is in C because that was what was available back then, but C++ is much more powerful than C. True that you can get things done in C, but you can get things done better in C++.
For example, I wish you good luck trying to manage collections in C. You'll have to use C arrays, meaning you will have to keep d... | <urn:uuid:445dbc8f-8c40-4514-a1a8-d5470c1bffa2> | 2.828125 | 488 | Comment Section | Software Dev. | 50.749385 |
What History Teaches Us About Our Environmental Challenges
It seems that the environmental challenges we face are truly daunting. That we may never be able to survive them, even if we do our best to do so. A study by MIT professor Susan Solomon says it's often helpful — and heartening — to look to the past.
Solomon poi... | <urn:uuid:acd29e49-c35b-42f6-872b-2d6cba4ca2b7> | 3.28125 | 407 | Truncated | Science & Tech. | 29.588537 |
Get flash to fully experience Pearltrees
Python is an easy to learn, powerful programming language. It has efficient high-level data structures and a simple but effective approach to object-oriented programming.
Python is an easy to learn, powerful programming language.
Python is a general-purpose , high-level programm... | <urn:uuid:2fdf3a4a-26cb-45a4-91aa-3c5addd45c08> | 3.140625 | 142 | Knowledge Article | Software Dev. | 24.954797 |
Sail-World.com : Crabs help Great Barrier Reef coral combat white syndrome
Crabs help Great Barrier Reef coral combat white syndrome
'Crabs help Great Barrier reef fight deadly disease'
F. Joseph Pollock
A particular species of crab has been assisting Great Barrier Reef coral in combating white syndrome, a deadly disea... | <urn:uuid:901a1474-7ea4-4b09-b9f4-07b514d3e58d> | 2.78125 | 856 | Truncated | Science & Tech. | 43.56125 |
Anticipating snow and cabin-fever over the holidays, I planned our biggest experiment yet, which I called 'The Great Paper Airplane Experiment.' Our local Boys and Girls Club
(special thanks to Reggie Brodie at BGCAA
for making it available!) happens to have a fabulous new facility with a full size basketball court and... | <urn:uuid:c751b2da-80a4-4179-aaa3-9b8d363ae858> | 2.796875 | 1,065 | Personal Blog | Science & Tech. | 60.868093 |
On multi-developer software projects, you can sometimes speed up every developer's builds a lot by allowing them to share the derived files that they build. SCons makes this easy, as well as reliable.
To enable sharing of derived files,
in any SConscript file:
Note that the directory you specify must already exist and ... | <urn:uuid:c40d7c99-2b9f-4e90-b7bf-0f4ee1be9318> | 2.984375 | 412 | Documentation | Software Dev. | 41.366777 |
Naked Egg Experiment
Which came first, the rubber egg or the rubber chicken?
This experiment answers the age-old question, "Which came first, the rubber egg or the rubber chicken?" It's easy to make a rubber egg if you understand the chemistry of removing the eggshell with vinegar. What you're left with is a totally em... | <urn:uuid:41b56212-e32d-47de-9e45-834bbc892a71> | 3.734375 | 1,371 | Personal Blog | Science & Tech. | 67.476396 |
If gravity only attracts mass and If light doesnt have mass why does it appear to bend when passing a planet ?
Question asked by: knowitall
No comments have been added to this question "If gravity only attracts mass and If light doesnt have mass why does it appear to bend when passing a planet ?".
Find out more about A... | <urn:uuid:fd57174a-f7ce-4aa6-b221-c9c29d36700c> | 2.875 | 254 | Q&A Forum | Science & Tech. | 61.180703 |
If E.T. is out there, it may be a lot easier to find him than we thought mostly because there are a lot more places for him to live. Scientists looking for life (or at least earthlike life) have always obeyed a simple rule: follow the water. Biology is a wet process, after all and generally the wetter the better. Now, ... | <urn:uuid:5d6cff7a-a9e6-4dc0-ad56-ac2a9aaad3f6> | 3.71875 | 853 | Truncated | Science & Tech. | 45.410385 |
On to another topic of far greater global importance...
It is astounding to me that people who would seem to have a modicum of scientific sense can even vaguely entertain the various concepts of "carbon sequestration" as being in any way valid approaches to "solving" the problem of carbon releases from burning fossil f... | <urn:uuid:a98883e6-2816-42e3-8701-60e159c872f0> | 2.765625 | 1,511 | Personal Blog | Science & Tech. | 52.497239 |
It is widely known that green plants play a critical role in global carbon cycle by sequestering carbon dioxide from the atmosphere and converting it into organic compounds by using solar energy through the process of photosynthesis and releasing oxygen as a by product. In addition to oxygen plants from their green lea... | <urn:uuid:a6361964-4bc8-419a-be99-20c863838755> | 3.703125 | 279 | Knowledge Article | Science & Tech. | 23.899662 |
The greek word, “Zeo”, means to boil, and “lithos” means stone, thus zeolite means the rock that boils.
Because of their unique porous properties, zeolites are used in a variety of applications .
What are zeolites ? Zeolites are honeycomb like small rigid crystals working much like a sponge. When heated, the pores open... | <urn:uuid:36b9bc4e-a30b-4500-a10c-c57814264b9a> | 3.453125 | 320 | Knowledge Article | Science & Tech. | 43.255011 |
|The Most Energy Efficient Building In America - Science Insider
Reported May 2011
HOW CAN HOMES CONSERVE ENERGY? There are many ways in which houses can conserve energy. Improvements in energy-efficient lighting can reduce power usage by as much as 65 percent. In fact, if every American household changed just five of ... | <urn:uuid:2cf97311-132e-489e-aeca-94cef4835537> | 3.328125 | 404 | Truncated | Science & Tech. | 31.137893 |
|Browsing: All Content in Algebra II for Rational Root Theorem Browse discussions||Login to Subscribe / Save Results||Resource Name||Topic (Course)||Technology||Type||$?||Rating|
|Watch Your P's and Q's||Rational Root Theorem (Algebra II)||TI-Nspire||Activity|||
Students will investigate rational roots of polynomials g... | <urn:uuid:127d57af-a7fe-447d-9886-5e7f0c327bb5> | 2.75 | 124 | Content Listing | Science & Tech. | 38.803262 |
Before i posted this,i tried reading my notes again and again! so any help....id be thankful!
here is the problem...
consider f(x) = lnx, with A element in (0,1)
confirm the continuity of f in (0,1)
Let x0 be an element in (0,1)
then |lnx - lnx0| = | ln x/x0 | = ln(1 - (x0 - x)/x0)
this is smaller than or equal to 2|(x... | <urn:uuid:f772f0eb-2ffd-421c-b84c-31768b65c0b8> | 2.828125 | 322 | Q&A Forum | Science & Tech. | 116.780044 |
I have always been intrigued by the extraordinary insights of the self-taught mathematician Srinivasa Ramanujan. He worked in almost complete isolation from the mathematical community, and independently rediscovered many existing results while also making his own unique contributions. He didn’t even share notation with... | <urn:uuid:3eedb26e-dc63-4d3d-9778-c0ff2865700b> | 3.171875 | 826 | Personal Blog | Science & Tech. | 38.899946 |
The ANOVA F-test to compare the means of k normally distributed populations is not applicable when the variances are unknown, and not known to be equal. A spacial case, k=2, is the famous Behrens-Fisher problem (Behrens, 1929; Fisher, 1935). Welch (1951) test was proposed to fill this void, a generalization to his 1947... | <urn:uuid:9a57f667-1db7-4cd1-84a6-5a24633f8867> | 2.921875 | 176 | Knowledge Article | Science & Tech. | 59.252095 |
What relationship, if any, is there among the quality, size, and amount of fruit found in an area, and the number and variety of birds found in the same area? On coffee plantations in Latin America, the relationship between the 2 is unmistakable and compelling.
Coffee plantations make up 42% of all dedicated cropland i... | <urn:uuid:97846231-ce32-49a3-a196-978738d6ae9b> | 3.875 | 1,242 | Knowledge Article | Science & Tech. | 34.223437 |
First light from the Far-Infrared Spectroscopy of the Troposphere (FIRST) instrument
Article first published online: 4 APR 2006
Copyright 2006 by the American Geophysical Union.
Geophysical Research Letters
Volume 33, Issue 7, April 2006
How to Cite
2006), First light from the Far-Infrared Spectroscopy of the Troposphe... | <urn:uuid:d7be7568-5a0d-4677-8ddb-47422d7233fb> | 2.796875 | 397 | Academic Writing | Science & Tech. | 41.400784 |
I'm reading Nano: The Essentials by T. Pradeep and I came upon this statement in the section explaining the basics of scanning electron microscopy.
However, the equation breaks down when the electron velocity approaches the speed of light as mass increases. At such velocities, one needs to do relativistic correction to... | <urn:uuid:a397a31b-1da4-4dfa-a492-d8058e726b0d> | 2.765625 | 138 | Q&A Forum | Science & Tech. | 63.367807 |
Major Section: MISCELLANEOUS
Sometimes an event will announce that it is ``redundant''. When this happens, no change to the logical world has occurred. This happens when the logical name being defined is already defined and has exactly the same definition, from the logical point of view. This feature permits two indepe... | <urn:uuid:1e05b61c-831e-489e-9aa3-b86e484d4882> | 2.765625 | 2,310 | Documentation | Software Dev. | 39.226362 |
The Universe is rarely static, although the timescales involved can be very long. Since modern astronomical observations began we have been observing the birthplaces of new stars and planets, searching for and studying the subtle changes that help us to figure out what is happening within.
The bright spot located at th... | <urn:uuid:717045a7-aac6-44f5-9004-cb1e20f6c5be> | 3.328125 | 503 | Personal Blog | Science & Tech. | 57.003584 |
Light is a form of energy. To create light, another form of energy must be supplied. There are two common ways for this to occur, incandescence and luminescence.
Incandescence is light from heat energy. If you heat something to a high enough temperature, it will begin to glow. When an electric stove's heater or metal i... | <urn:uuid:88aa856f-4c75-47ae-a461-d50c6bfeeba8> | 4 | 1,181 | Knowledge Article | Science & Tech. | 23.465575 |
Science Fair Project Encyclopedia
The American sycamore (Platanus occidentalis), also known as American plane and Buttonwood, is one of the species of Platanus native to North America, where it is rather confusingly very often just called Sycamore, which can refer to other types of tree.
It forms a massive tree, typica... | <urn:uuid:0ceaa0a6-f5e5-4cf8-ac8f-3e9e3509979d> | 3.546875 | 327 | Knowledge Article | Science & Tech. | 29.761053 |
To ensure the comparability of observation results and to estimate seasonal and year-to year variations in oceanographic variables, it was suggested in Stockholm as early as 1899 that measurements should be made at standard depths and on standard sections. At the beginning of the 20th century observations started on th... | <urn:uuid:c48cf392-a581-4410-9665-5bb4da11f382> | 3.1875 | 613 | Knowledge Article | Science & Tech. | 35.516051 |
Ethan A. Huff - March 14, 2011
Since 2006, the use of nanoparticles in consumer products has skyrocketed by over 600 percent. Nanotechnologies, which involve the manipulation of elements and other matter on the atomic and molecular scale, are now used in over 1,300 commercial and consumer products. And that number is e... | <urn:uuid:a402fabf-099a-4a42-a416-b88c922804a1> | 2.90625 | 203 | Personal Blog | Science & Tech. | 27.385705 |
Arthropods first appeared over 560 million years ago and are now the most abundant and diverse group of multicellular metazoans on Earth with over a million species described, and millions more left to be discovered! Arthropods are bilateral animals with internal and external segmentation. Most have a distinct head reg... | <urn:uuid:ee3efdda-30a9-4fa5-8372-c0901baf18cb> | 3.984375 | 1,814 | Knowledge Article | Science & Tech. | 34.55159 |
Found 0 - 10 results of 59 programs matching keyword " solar viewing"
Watch the beginning of Venus’s transit across the disk of the sun, one of the rarest astronomical events. Watch the conclusion of Venus’s 6.5-hour journey across the disk of the sun, one of the rarest astronomical events. Senior Exploratorium Scienti... | <urn:uuid:00b49044-30f9-4b29-9670-ea9590d14ebc> | 2.78125 | 681 | Content Listing | Science & Tech. | 51.004428 |
The last article was on <stdlib.h> Standard Library. This article is on <assert.h> Diagnostics for Programmers.
I am assuming a knowledge of c programming on the part of the reader. There is no guarantee of accuracy in any of this information nor suitability for any purpose.
If used properly assertions will allow progr... | <urn:uuid:a6706e94-5eaa-4084-8cac-e419f49b0e8d> | 2.8125 | 517 | Documentation | Software Dev. | 55.800662 |
Introducing Dr. Bulinski: Hermit Crab Researcher (Part 2)
Miles Lightwood (ML): Another idea you shared was an alternate approach to addressing the shortage with printed shells. Please explain.
Dr. Katherine Bulinski (KB): One approach that was initially considered is that these printed shells could be distributed in t... | <urn:uuid:d9928361-3feb-44a2-8df9-047d0038d486> | 3.46875 | 908 | Audio Transcript | Science & Tech. | 44.336723 |
Plants influence everything from food chains to climate change. Yet we know little about the traits that allow plants to survive and adapt to their habitat or to a warming planet. We are a long way from being able to harness these adaptations for our own benefit. Our failure to understand these traits is in part due to... | <urn:uuid:a2bccebc-3b27-4778-8e05-d37fb67a35af> | 3.90625 | 341 | Knowledge Article | Science & Tech. | 31.889326 |
2 space rocks hours apart point up the danger
Bill Cooke, head of the Meteoroid Environments Office at NASA's Marshall Space Flight Center in Huntsville, Ala., said the space agency takes asteroid threats seriously and has poured money into looking for ways to better spot them. Annual spending on asteroid-detection at ... | <urn:uuid:238db8a1-4026-4966-8adf-279a0708647d> | 3.140625 | 295 | Truncated | Science & Tech. | 45.908845 |
Plasma shock waves
Launched by two Russian rockets in the summer 2000, the four Cluster spacecraft then used their own thrusters to get to an elliptical orbit with a closest distance to the Earth of nearly 20 000 km, and getting as far away as nearly 120 000 km: nearly a third of the distance to the moon. Cluster?s tas... | <urn:uuid:5b65925f-b516-4c78-b38c-33f869cc74c3> | 4.125 | 406 | Knowledge Article | Science & Tech. | 47.67656 |
The Science Guys
Science Guys > January 2003
What is gravity and where is it the strongest in the United States?
Of the four fundamental forces - gravity, electromagnetic, strong nuclear, and weak nuclear - gravity is the one with which people are most familiar. Isaac Newton is credited with ’discovering gravity’. What... | <urn:uuid:c577fc7c-3027-4d19-89df-a2706c1f98b2> | 3.5625 | 605 | Knowledge Article | Science & Tech. | 51.646222 |
Atomic Energy Levels
(More about Bohr's Atomic Model for Hydrogen)
This electric force _is_ the centripetal force that holds the electron in a circular orbit,
The total energy of the system is
From setting the electric force equal to the centripetal force, we know
so the total energy is
This equation connects energy wi... | <urn:uuid:ed752b03-3efa-4f2e-a04b-2a80d55e3f16> | 3.71875 | 601 | Academic Writing | Science & Tech. | 56.871042 |
The challenges currently presented by our world are unprecedented in scale and urgency: climate change; deforestation; freshwater shortage; biodiversity loss; food insecurity; desertification and more, all of which require resolute address. The recent fires in Russia and tragic flooding in Pakistan have demonstrated th... | <urn:uuid:375858f4-b926-4811-a9fa-43ff932eaee3> | 3.84375 | 859 | Comment Section | Science & Tech. | 35.202292 |
The Pacific will compress by 250 miles at the Equator during the 7 of 10 S American roll. This 250 mile compression is the
sum total of 47 miles due to the tilting of the Philippine Plate, and 78 miles due to the folding of the Mariana Plate and
Mariana Trench. An additional 125 miles of compression comes from the over... | <urn:uuid:3a4bc6b3-5655-4b06-bcf9-71398dfc81df> | 3.46875 | 3,333 | Comment Section | Science & Tech. | 49.531589 |
The pair of observers that make up NASA’s Solar Terrestrial Relations Observatory (STEREO) have been traveling since 2006 to reach opposite sides of our star, and they just beamed back the first 360-degree solar images.
The satellites are in the same orbital path as Earth, more or less, and have just taken up their fin... | <urn:uuid:180d74ac-5958-443f-ac46-3d815da8a672> | 3.5 | 479 | Personal Blog | Science & Tech. | 49.650272 |
One of the new features that we are adding to the language is the concept of a private partial method. In order to discover the rationale behind this feature, let's consider a scenario where a designer generates some code and wishes to allow the user to customize certain behavior at certain points in the generated code... | <urn:uuid:7371da23-f1ac-4182-828c-4f2df0000ab5> | 2.828125 | 1,302 | Documentation | Software Dev. | 35.081604 |
|Mean distance from Earth||150,000,000 km|
|Visual brightness (V)||-26.8m|
|Relative diameter (dS/dE)||109|
|Surface area||6.09 × 1012 km2|
|Volume||1.41 × 1027 m3|
|Mass||1.9891 × 1030 kg|
|Relative mass to Earth||333,400|
|Density||1411 kg m-3|
|Relative density to Earth||0.26|
|Relative density to water||1.409|
|Sur... | <urn:uuid:1877909a-933e-493a-b8c3-770fc4274b03> | 3.734375 | 752 | Knowledge Article | Science & Tech. | 63.302959 |
In Starting E and Elmer, we see the various ways to get started interacting with an E interpreter.
In Example: Finding Text, we introduce the major concepts you need to get started programming in E as a conventional language. We use these concepts to write some simple functions for finding text in files on your disk.
I... | <urn:uuid:724d1b4a-6033-4018-824a-7b25060b8000> | 3.125 | 507 | Content Listing | Software Dev. | 39.51246 |
Not just birds, but also a few species of bats face a long journey every year. Researchers have studied the migratory behavior of the largest extant family of bats, the so-called “Vespertilionidae” with the help of mathematical models. They discovered that the migration over short as well as long distances of various k... | <urn:uuid:aeeb4075-a84f-469b-a5cd-a1703d9b9189> | 3.96875 | 205 | Content Listing | Science & Tech. | 25.264944 |
3. The entropy change, ΔS, associated with the isothermal (i.e. constant temperature) change in volume of n moles of an ideal gas from volume V1 to volume V2 is given by the equation ΔS = nR ln(V2/V1) where R is the gas constant.
& If an expansion occurs (V2 > V1) use Equation 1 to deduce whether there will there be an... | <urn:uuid:d6714938-7963-4c54-b091-59aa868afcf9> | 3.15625 | 145 | Q&A Forum | Science & Tech. | 84.24813 |
Have you tried solving Challenge #10 yet? Go try it first if you haven’t. It’s not too hard, I promise!
All of these can be shown by just plugging in the values of and , but I’d like to show you some easier ways.
The first problem is easy — we know that is a solution to the equation ; that is, . Some simple algebra sho... | <urn:uuid:a25c0b2d-8d15-4ff3-b695-4fc344eeaa36> | 2.984375 | 242 | Personal Blog | Science & Tech. | 74.509467 |
We’ve all seen the traditional grade-school scale models of the solar system. Maybe you made one years ago in science class out of painted Styrofoam balls or colored construction paper.
Or maybe you've seen one of those giant models hanging from the ceiling of a science museum. Big colorful globes, some with rings arou... | <urn:uuid:70d35542-6d8e-4166-a061-13bc988ea02e> | 3.203125 | 1,149 | Nonfiction Writing | Science & Tech. | 74.002338 |
Reply to comment
The essence of mathematical modelling is simplification. Natural events are the result of multiple interrelated processes, themselves dependent on a history of other processes, in an almost endless web of cause and effect. To study a system, the mathematical modeller begins by identifying the crucial a... | <urn:uuid:f9c111a8-d4e5-445a-a587-d0df695dfef0> | 2.71875 | 2,420 | Comment Section | Science & Tech. | 39.463663 |
This text can be taken as an introduction to General Relativity, by its way to independently explain, justify and use the Einstein's equation of General Relativity, in a simplified way thanks to the simplicity of this particular problem.
However it assumes the concept of Riemannian curvature in 2 dimensions.
An introdu... | <urn:uuid:bcc0028c-3433-4d94-8c40-57f8841975fa> | 3.765625 | 1,843 | Academic Writing | Science & Tech. | 57.355459 |
Coastal & Marine Geology InfoBank
Our Mapping Systems
The USGS and Science Education
USGS Fact Sheets
ground penetrating radar
Comment: 02:35 - 03:59 (01:24)
Source: Annenberg/CPB Resources - Earth Revealed 24, Waves, Beaches and Coasts
Keywords: "ocean wave", beach, energy, ripple, wind, crest, trough
Our transcriptio... | <urn:uuid:efd57bd8-9a48-44e3-91d5-80d765d97927> | 3.796875 | 326 | Knowledge Article | Science & Tech. | 54.008225 |
February 21, 2012 - Earthquakes by Time of Day: I downloaded all earthquakes >= to 6.0 magnitude, from 1973 to 2012, from the USGS website. I then categorized them by time of day. The results are presented in the graph above. The axis at the bottom (X) reflects the time of day, e.g., ’0AM is between Midnight and 59 min... | <urn:uuid:f3207bc9-4901-4ced-b844-f5e2d3368d11> | 3.21875 | 440 | Personal Blog | Science & Tech. | 76.340345 |
The structure of the synapse
In order to understand the synapse and the changes in it associated with learning, we need to know its structure. There are over 1000 different proteins in a synapse, and we need to their distribution and their numbers, and how changes in these factors modulate synaptic activity. Electron m... | <urn:uuid:32390422-7e50-49a0-a628-d7c6116ca424> | 3.296875 | 1,472 | Academic Writing | Science & Tech. | 48.525632 |
yellow wood sorrel
Simply begin typing or use the editing tools above to add to this article.
Once you are finished and click submit, your modifications will be sent to our editors for review.
...ejecting the true seed. The leaflets, as in other species of the genus, fold back and droop at night. Besides the wood sorre... | <urn:uuid:7e4179de-78b0-4fab-a4ce-059ad7855aec> | 2.859375 | 153 | Knowledge Article | Science & Tech. | 63.797862 |
To introduce concepts of astronomy, it is often best to start with actual observing projects to engage the student/pupil in visualizing the solar system that the earth is a part of. The most obvious starting place for this is to look at what causes our days and nights (the earth rotating on its axis once every 24 hours... | <urn:uuid:343301e8-4430-4f41-9515-4db41e2db056> | 4.1875 | 1,028 | Knowledge Article | Science & Tech. | 62.252034 |
Today NASA's Jet Propulsion Laboratory announced the results of their study which shows Expanding Earth is false. Using GPS, satellite orbits, satellite laser ranging, and radio astronomy, NASA is convinced there is no significant change in the Earth's width at all. The only "change" measured equaled out to 0.004 inche... | <urn:uuid:0c8e87b6-6174-47eb-bce2-607c9facbb71> | 3.34375 | 149 | Comment Section | Science & Tech. | 67.484506 |
For Question 44
Considering that the loop is complete, we know that the electric field at the center will be zero. Now consider an element on the ring of length ∂l. The electric field exerted by this element at the loop center must be equal in magnitude and opposite in direction to the field exerted by the rest of the ... | <urn:uuid:4943b51c-763c-42ec-8e99-f180d7550340> | 2.6875 | 209 | Tutorial | Science & Tech. | 67.00545 |
No matter how hard you try, maybe giving up maths straight after leaving high school, you inevitably end up having to solve a bleeding problem some time.
Or you enjoy the simplistic logic of maths. Either way, these 10 easy tricks to solving a few harder problems will be of use to you.
The first trick is similar to the... | <urn:uuid:e3ce1b37-044e-4826-ba2e-f7cd1daf8a39> | 3 | 163 | Listicle | Science & Tech. | 65.752564 |
Thomas Robinson of Glamorgan is trying to patent (GB2334292) a simple idea that could save lives, especially for unskilled do-it-yourself roofers or aerial and satellite dish installers. Before any ladder is used, the would-be climber throws a ball connected to a line over the roof. The line is pulled tight from the ot... | <urn:uuid:3d5d2e7f-643f-4b04-9cbf-7e146bbb8c98> | 2.71875 | 175 | Truncated | Science & Tech. | 54.99 |
Video: Bubble multiplies
BUBBLES live on in their offspring. A bursting bubble begets daughter versions of itself - which could influence everything from glass-making to atmospheric processes.
The process of a large air-bubble popping on a surface has been described, but researchers had no insight into the mechanism, s... | <urn:uuid:5984bd45-dcce-4bc3-ac80-7c9854b37269> | 3.453125 | 475 | Truncated | Science & Tech. | 52.924382 |
What Is Hibernateby James Elliott, author of Hibernate: A Developer's Notebook
- Hibernate is a free, open source Java package that makes it easy to work with relational databases. Hibernate makes it seem as if your database contains plain Java objects like you use every day, without having to worry about how to get th... | <urn:uuid:68c17ab9-ebf3-4f5b-b731-9d6cb5ce865f> | 2.953125 | 1,089 | Truncated | Software Dev. | 36.105778 |
(PHP 4, PHP 5)
tempnam — Create file with unique file name
Creates a file with a unique filename, with access permission set to 0600, in the specified directory. If the directory does not exist, tempnam() may generate a file in the system's temporary directory, and return the name of that.
The directory where the tempo... | <urn:uuid:82fd5697-5f38-4a27-80bb-4c13be024068> | 3.609375 | 379 | Documentation | Software Dev. | 55.725403 |
SCU has 1,050 kilowatts of solar panels on four of its buildings, making it the third largest roof- top system among all American colleges and universities. The system generates 1.5 million kilowatt-hours of clean energy and eliminates 511 metric tons of carbon dioxide annually. That’s equivalent to taking 127 small ca... | <urn:uuid:7cf0d098-3cc4-4626-acbb-d6593d665830> | 2.859375 | 342 | Knowledge Article | Science & Tech. | 50.941659 |
The World's Worst Invasive Mammals
Animals as common as goats, deer, rabbits or mice can have a devastating effect on other wildlife
- By Jess Righthand
- Smithsonian.com, December 20, 2010
House mouse (© Redmond Durrell / Alamy)
Apart from humans, mice (Mus musculus) are thought to be the most widely distributed anima... | <urn:uuid:0654cf47-99db-4fa5-bcc2-b356d5b370a9> | 3.21875 | 227 | Truncated | Science & Tech. | 41.327716 |
Content in this section supports the concept of growing crops in space and the symbiotic relationship between plants and space travelers. Plants in space are beneficial for a number of reasons. They provide nourishment for the body when eaten as food, and they improve the quality of indoor air. Plants take the carbon d... | <urn:uuid:489d1942-ad23-40c6-a250-666b90abf67b> | 3.703125 | 520 | Content Listing | Science & Tech. | 50.129455 |
Genetically engineered canola resistant to two common herbicides has been found growing widely along roadsides in North Dakota, one of the first instances of a biotech crop establishing itself in the wild.
This might not even be a problem at all, although critics of biotech crops might conceivably point to it as an exa... | <urn:uuid:ea7967eb-8468-49a1-b0bf-36f0b57acb04> | 3.09375 | 235 | Truncated | Science & Tech. | 42.706022 |
Although real-time operating systems and applications have been available for multicore systems for some years, shared-memory parallel systems still pose some severe challenges for real-time algorithms, particularly as the number of CPUs increases. These challenges can take the form of lock contention, memory contentio... | <urn:uuid:fb06d93c-8040-4bb4-9c40-73b8e18455c9> | 2.75 | 247 | Academic Writing | Software Dev. | 28.334 |
Search Course Communities:
Course Topic(s): Ordinary Differential Equations | Analytic Methods
This webpage displays fully-worked examples showing the solution of an exact first-order initial value problem. While there are an essentially endless supply of examples, all have the derivative equal to a rational function o... | <urn:uuid:708a4058-c6c2-4157-9578-f2103ec7bd0a> | 2.84375 | 222 | Content Listing | Science & Tech. | 42.901631 |
Sophie built a small tower, made of bricks, in her back garden. On top of it she fitted a large glass light-bulb holder.
The diagram shows it as part of a circle.
Centre, C, is 20 centimetres above the top of the wall.
1. Calculate the radius of the circular bulb holder.
2. Use this to find the total height of the stru... | <urn:uuid:de27a51c-657c-42ba-99b3-9f94fd16957a> | 3.421875 | 94 | Q&A Forum | Science & Tech. | 84.992794 |
3D X-Ray Microtomography Reconstructions
At coal measure localities such as Mazon Creek exceptional preservation of organic material can be found within early-diagenetic siderite (iron carbonate) nodules. The rapid envelopment of fossils within this concretionary material provides a high level of compressional resistan... | <urn:uuid:11e43eac-64a1-46bd-a370-7bff13ae502c> | 3.203125 | 809 | Knowledge Article | Science & Tech. | 34.489527 |
You can put this solution on YOUR website!
This article is about the mathematical term. For other uses, see Slope (disambiguation).
Search Wiktionary Look up slope in Wiktionary, the free dictionary.
The slope of a line is defined as the rise over the run, m = Δy/Δx.
In mathematics, the slope or gradient of a line desc... | <urn:uuid:484972c0-654e-4c21-ac72-6e7b645890fd> | 3.703125 | 183 | Knowledge Article | Science & Tech. | 55.370451 |
This root program defines a procedure that builds an environment from lists of names and values.
(code zip (vars vals r k) ((prim done null? vars) (if done ((prim p car k) (jump p k r))) (prim vars-hd car vars) (prim vals-hd car vals) (prim vars-tl cdr vars) (prim vals-tl cdr vals) (prim bind cons vars-hd vals-hd) (pri... | <urn:uuid:bdfa83ce-5015-420a-be31-331183969947> | 3.046875 | 292 | Documentation | Software Dev. | 78.536154 |
- Bulgarian (bg)
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- French (fr)
- Hungarian (hu)
- Icelandic (is)
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- Lithuanian (lt)
- Latvian (lv)
- Maltese (mt)
- Dutch (nl)
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- Portuguese (pt)
- Romanian (ro)... | <urn:uuid:692cdbf8-0475-41ac-babb-df99daf65bd0> | 3.03125 | 1,341 | Content Listing | Science & Tech. | 44.762501 |
An international team led by scientists from the Max-Planck-Institute for Radio Astronomy has succeeded in observing the heart of a distant quasar with unprecedented sharpness, or angular resolution. The observations, made by connecting radio telescopes on different continents, are a crucial step towards a dramatic sci... | <urn:uuid:e4569520-f109-4cad-86e6-1d1bf303b0a2> | 3.28125 | 1,846 | Content Listing | Science & Tech. | 36.191283 |
by Donna Hesterman
Gainesville, FL (SPX) Sep 21, 2012
An international team of scientists is rewriting a page from the quantum physics rulebook using a University of Florida laboratory once dubbed the coldest spot in the universe.
Much of what we know about quantum mechanics is theoretical and tested via computer model... | <urn:uuid:6cd1fc01-836e-4f05-b111-ee2c66bc6261> | 3.015625 | 1,336 | Truncated | Science & Tech. | 26.704937 |
Very high level language (VHLL) is a high level programming language designed to reduce the complexity and amount of source code required to create a program. VHLL incorporates higher data and control abstraction abilities.
A very high level programming language is also known as a goal-oriented programming language.
Sl... | <urn:uuid:3fcdcfc4-a11c-44b9-8e95-df0ae2ae7783> | 2.953125 | 149 | Knowledge Article | Software Dev. | 23.331316 |
An extensively peer-reviewed study published last December in the Journal of Atmospheric and Solar-Terrestrial Physics indicates that observed climate changes since 1850 are linked to cyclical, predictable, naturally occurring events in Earth’s solar system with little or no help from us. The research was conducted by ... | <urn:uuid:9797dd2d-cccc-495c-808c-f4bcf1a49c9d> | 3.28125 | 1,905 | Nonfiction Writing | Science & Tech. | 29.63673 |
Core Text is an advanced, low-level technology for laying out text and handling fonts. It is designed for high performance and ease of use. The Core Text API, introduced in OS X v10.5, is accessible from all OS X application environments. It is also available in iOS 3.2.
The Core Text layout engine is designed specific... | <urn:uuid:1a97b96a-c3b7-46b3-be84-65ec27fa047b> | 2.96875 | 519 | Documentation | Software Dev. | 35.891571 |
A Lisp program consists of expressions or forms (see Forms). We control the order of execution of these forms by enclosing them in control structures. Control structures are special forms which control when, whether, or how many times to execute the forms they contain.
The simplest order of execution is sequential exec... | <urn:uuid:eb89ced8-a02f-4cf9-b15e-2c23361c6db6> | 3.765625 | 247 | Documentation | Software Dev. | 43.818343 |
Metadata record for data from ASAC Project 244 See the
link below for public details on this project.
From the abstracts of the referenced papers:
Photoinhibition of Grimmia antarctici (Grimmia is now known as Schistidium) during the summer at Casey, East Antarctica, was indicated by a reduction in photosynthetic capac... | <urn:uuid:f18b037e-17aa-42de-8000-fb0fc8cd4f9b> | 2.78125 | 385 | Academic Writing | Science & Tech. | 24.091414 |
Can you find a relationship between the number of dots on the
circle and the number of steps that will ensure that all points are
A game in which players take it in turns to choose a number. Can you block your opponent?
A game that tests your understanding of remainders.
Make a line of green and a line of yellow rods s... | <urn:uuid:b105b380-c373-4620-a09c-8cedaccf5592> | 3.328125 | 1,609 | Content Listing | Science & Tech. | 82.815199 |
I’ve been fortunate enough to travel around the world as TIME’s environment correspondent: to rainforests, Himalayan mountains, coral reefs. But far and away the most singular spot I ever visited was the far north of Greenland. I saw vast flat ice sheets that spread in all directions, without end. I saw icebergs that c... | <urn:uuid:262a6ce2-24b5-457f-8053-eb104a3d4fbd> | 3.1875 | 267 | Truncated | Science & Tech. | 53.44 |
- Leaving a Smaller Footprint - Students work to offset carbon emissions generated by class field trip
Leaving a Smaller Footprint - Students work to offset carbon emissions generated by class field trip
May 27, 2011
Three vans travelling 3,000 miles can leave an awfully big carbon footprint—a 6.2-metric-ton footprint,... | <urn:uuid:93c3181d-e2e2-4fad-a5be-545b80ac46fc> | 3 | 314 | Truncated | Science & Tech. | 42.9425 |
Learn more physics!
I have a strand of LED lights that need 12 volts to push the color lights and 15 volts to push an all white strand.
I have no knowlodge of how electricity works. How can I run these lights using regular battries?
These lights are my portable samples so I need something small. These lights can run of... | <urn:uuid:32409e6e-19ae-43c7-9ccf-267db88f546d> | 2.734375 | 289 | Q&A Forum | Science & Tech. | 88.286945 |
EEGs can now record brainwaves without the need for electrodes to be
inserted into the brain or even for them to be placed on the scalp.
The figure shows a brainwave trace for periods when the eyes are open
and when they are closed. The red regions respond to the alpha wave
(eyes closed) at a frequency of around 9 Hz. ... | <urn:uuid:9bf0fc88-8759-4467-9409-8a86da44c416> | 2.8125 | 105 | Knowledge Article | Science & Tech. | 49.459028 |
Lunar Dust Bowl
Despite evidence from two space probes in the 1990s, radar astronomers say they can find no signs of thick ice at the moon's poles. If there is water at the lunar poles, the researchers say, it is widely scattered and permanently frozen inside the dust layers, something akin to terrestrial permafrost.
|... | <urn:uuid:ce0d312a-a297-48ce-a3cf-79aa3b5219ad> | 3.9375 | 1,587 | Knowledge Article | Science & Tech. | 34.500292 |
by Robert Stonefield
There is a significant weather event that happens every winter but is usually an afterthought, high winds. High winds are more common during the winter months, especially if you live in the higher elevations. These high winds are linked to cold frontal passages (Fig. 1) and developing coastal lows ... | <urn:uuid:e5008edf-d34c-4876-859c-ea34dcb768e6> | 3.703125 | 1,007 | Knowledge Article | Science & Tech. | 58.194318 |
|Convection in Thunderstorms|
|Building Atmospheric Giants
The up and down motions associated with convection help fuel monstrous thunderstorms. A thunderstorm feeds off of warm air underneath it. Warm air near the ground rises because it's less dense. When the air reaches the base of the cloud, water vapor in the air ... | <urn:uuid:8736339b-15db-4340-910e-d973e86606a0> | 4.34375 | 242 | Knowledge Article | Science & Tech. | 61.051136 |
Color composite infrared image using adaptive optics on the Gemini North telescope.
Dust obscures this star forming region at optical wavelengths but is visible at longer infrared wavelengths.
(Resolution = 0.12 arcseconds FWHM)
Photo Credit: Gemini Observatory, US National Science Foundation, and University of Hawaii ... | <urn:uuid:0b6c3a25-d790-41e6-99ce-ee1024dacb91> | 3.46875 | 537 | Knowledge Article | Science & Tech. | 46.184353 |
Turning Over a New Leaf
Researchers are trying to copy a trick of nature by turning sunlight into fuel.
By Nicola Jones
Plants perform a kind of magic: they take the basic ingredients of a little sunlight, water and air, and turn them into fuel to grow leaves and fruit. If only mankind could do the same thing — turning... | <urn:uuid:4430e9af-a2a1-44c1-a3de-bd268d0b5326> | 2.984375 | 117 | Truncated | Science & Tech. | 66.306082 |
1. Common types of shells include sea shells, snail shells, turtle shells and eggshells.
2. There are more than 50,000 varieties of mollusk shells. Some open like clam shells, while others are shaped in a spiral and have a single hold where the animals enters and exits the shell.
3. Seashells are the external skeletons... | <urn:uuid:53f1f975-ad84-43e3-a90a-0190d3bbf177> | 3.515625 | 282 | Listicle | Science & Tech. | 66.49978 |
Within the last three decades there have been large wildfires consuming the forests in nearly all the mountain ranges above the desert southwest. Just below the ranges, the lack of rains combined with invasive species has caused additional wildfires that have devastated portions of the Sonoran Desert. The link between ... | <urn:uuid:fd4e204e-3c81-4cf3-897f-536d25366ccd> | 3.265625 | 236 | Truncated | Science & Tech. | 30.21753 |
Lab scientists have developed a rugged, inexpensive neutron detector—made largely of plastic—that could be mass-produced to provide more-widespread border screening for nuclear contraband.
Government agencies are currently fielding neutron detectors at seaports, airports, rail yards, and border crossings to detect cont... | <urn:uuid:187db21d-d8f9-4534-a626-7ae49aa290c9> | 3.5 | 1,560 | Knowledge Article | Science & Tech. | 33.586917 |