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 |
|---|---|---|---|---|---|---|
North Atlantic Right Whales, Eubalaena glacialis
Taxonomy Animalia Chordata Mammalia Cetacea Balaenidae Eubalaena glacialis
Description & Behavior
North Atlantic right whales, Eubalaena glacialis (Müller, 1776), aka Northern right whales, black right whales or Biscayan right whales, are similar in shape to bowheads, be... | <urn:uuid:f314e5c3-7f54-4e72-a936-b2f2c178a70d> | 3.796875 | 1,486 | Knowledge Article | Science & Tech. | 43.72346 |
Explore the Entire Region of the Sun’s Influence with NASA's 'Heliophysics Virtual Observatories'
Have you ever wondered how much data exist about the sun and how it affects the solar system and beyond? Data sets and images returned from NASA's cadre of space physics spacecraft, known collectively as the Heliophysics G... | <urn:uuid:e71e5906-9168-452a-aaa8-8a6aad465cbf> | 3.40625 | 887 | Knowledge Article | Science & Tech. | 28.709515 |
Michael Goldfarb of Vanderbilt University has established that steam power is the most efficient way to power humanoid robots, with the steam being generated by the palladium-catalysed decomposition of hydrogen peroxide (27 April, p 19). This avoids heavy batteries or the complexities of an internal combustion engine. ... | <urn:uuid:a760aa44-6d1f-4197-86bd-9abc73410637> | 3.140625 | 115 | Truncated | Science & Tech. | 35.511174 |
A UNIQUE community of bacteria living 300 metres beneath the floor of the Pacific Ocean has been investigated for the first time. This is the most detailed study so far of life within the oceanic crust, and it hints at a massive and virtually unknown ecosystem that runs independently of the Sun's energy.
Almost every m... | <urn:uuid:cc72a504-fd8e-4d89-b4e4-0e02d88f7176> | 3.84375 | 213 | Truncated | Science & Tech. | 48.430985 |
Do you think the pollution will still be on Earth in 100 years?
Yes, (and some people will still be around on Earth in 100 years
too: my Grandmother is 90 years old and still going strong!) Some kinds of
pollution are a necessary part of life, and will be around as long as there
are living things. Other kinds of pollut... | <urn:uuid:8105253b-ed1d-4758-9c70-07f67c0f3f5c> | 3.15625 | 285 | Knowledge Article | Science & Tech. | 45.895139 |
Endocarpon pusillum is an unusual lichen, because the algal component is not only found in the vegetative body, but also in the spore-forming fruiting body. This means it can be dispersed along with the fungal partner.
The lichen species Endocarpon pusillum grows on soils and forms squamules up to about 4mm. © C Gueida... | <urn:uuid:80d061ea-9f00-49e8-a11f-9aa57e572f78> | 4.03125 | 479 | Knowledge Article | Science & Tech. | 31.816504 |
|Jan29-12, 05:50 PM||#1|
Simple Diode Analysis Problem - Calculating Current/Voltage in a diode:
1. The problem statement, all variables and given/known data
Refer to the figure attached. Let IS = 25 fA and VCC = 10V. What is the total current, the current in the diode, and the current in the 5KΩ resistor? What is VD? ... | <urn:uuid:a154e3a2-b6c4-451a-b0e3-6fbff92c5517> | 2.8125 | 438 | Comment Section | Science & Tech. | 59.091581 |
For starters, the bird had small feathers on its hind legs. When he began doing a feather-by-feather reconstruction of its wings, working from a fossil in Germany, he found it didn’t look like a modern bird at all. Instead of the single layer of feathers that give modern birds their dextrous flight abilities, the fossi... | <urn:uuid:34dd02ee-0d38-45a2-8440-b120871f5140> | 3.5625 | 363 | Nonfiction Writing | Science & Tech. | 55.549507 |
The Science Guys
Science Guys > August 2002
I have heard a light bulb has glass around it to keep air away from the filament. Can a light bulb burn in space where there is no air without glass around it?
We may have all heard of interesting things happening in space where there is a weightless environment (not gravity ... | <urn:uuid:dc104064-3d91-4b22-8208-a415f8091fc4> | 3.4375 | 580 | Knowledge Article | Science & Tech. | 51.829991 |
The purpose of the statements is to tell the browser what to do.
Normally you add a semicolon at the end of each executable statement.
Using semicolons also makes it possible to write many statements on one line.
You might see examples without semicolons.
Each statement is executed by the browser in the sequence they a... | <urn:uuid:59bc354d-b663-4cc4-86bc-be2a22b7bd4a> | 3.75 | 339 | Documentation | Software Dev. | 48.634813 |
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.
2000 June 9
Explanation: This stunning image from the orbiting Chandra X-ray Observatory is centered on the Vela pulsar -- the collapsed stellar cor... | <urn:uuid:cf780806-308a-46f5-bb2c-70a0de347c12> | 3.59375 | 344 | Knowledge Article | Science & Tech. | 47.671809 |
A function is continuous at a point if
that is, for every arbitrarily small positive constant there exists () such that
for all and that satisfy .
A function is continuous on a point set if it is continuous at all points of . A function is piecewise continuous on , where and are intervals, if it is piecewise continuous... | <urn:uuid:52f87b3c-4ba6-4bf8-af40-136354b057ef> | 2.875 | 679 | Knowledge Article | Science & Tech. | 48.868461 |
Balaenoptera bonaerensis occurs in polar to tropical waters of the southern hemisphere. It occurs in large numbers south of 60º S, throughout the Antarctic. The distribution is more difficult to assess north of the Antarctic because of its co-occurrence with Balaenoptera acutorostrata. As a result, the boundaries of th... | <urn:uuid:b3ab2120-7ee2-40ff-96df-a81caed41195> | 3.625 | 223 | Knowledge Article | Science & Tech. | 36.884167 |
There is one instance for each circle-year.
These two fields are the composite key used to relate a circle-year to a circle.
The year number as a string of three digits with
left zero fill, e.g., “
008”. See Section 3.3, “Year number”.
The year key for this circle-year, left-justified and
blank-filled to length 5. S se... | <urn:uuid:6377f76f-7961-4c43-8d98-01904c83aa73> | 2.71875 | 312 | Documentation | Software Dev. | 83.944121 |
A working knowledge of surface tension allows you to shove a skewer through a balloon without popping it and a pencil through a plastic bag full of water without spilling. Make your nieces and nephews think you're cool.
Surface tension occurs when a group of molecules are more attached to each other than they are to th... | <urn:uuid:a4035fad-487a-4647-b676-82bdf6e1d16b> | 4.03125 | 539 | Tutorial | Science & Tech. | 60.29692 |
The Aeronomy of Ice in the Mesosphere (AIM) experiment studies Polar Mesospheric Clouds (PMC's), the ice crystal clouds that form in the Earth’s mesosphere. AIM helps uncover why these clouds form and why they vary, quantifying the connection between PMC's and the meteorology of the polar mesosphere. The AIM mission se... | <urn:uuid:00e78ba1-ee09-42c5-8b1e-466ef3eab407> | 3.03125 | 411 | Knowledge Article | Science & Tech. | 31.073606 |
pathconf, fpathconf - get configurable pathname variables
pathconf(const char *path, int name);
fpathconf(int fd, int name);
The pathconf() and fpathconf() functions provides a method
to determine the current value of a configurable system limit or
option variable associated with a pathname or file descriptor.
For path... | <urn:uuid:9e1b9a1c-c627-4c27-8579-0c0c7c5eb3cc> | 2.890625 | 576 | Documentation | Software Dev. | 43.149959 |
Robert Lichter reports on a survey of American climate scientists commissioned by STATS at GMU. Some of the findings:
In 1991 the Gallup organization conducted a telephone survey on global climate change among 400 scientists drawn from membership lists of the American Meteorological Association and the American Geophys... | <urn:uuid:1457585f-715d-434f-847e-e26558a61edf> | 2.90625 | 407 | Knowledge Article | Science & Tech. | 33.763106 |
The Araneae are the true spiders. Unlike the fossil spider-like trigonotarbids and their allies, almost all spiders have only five segments in the abdomen, and these are generally fused with no external trace of segmentation -- the earliest spiders had as many as twelve segments in their abdomen.
The last two abdominal... | <urn:uuid:b857886e-19d4-489c-b703-b3bb03af138d> | 3.765625 | 555 | Knowledge Article | Science & Tech. | 48.125627 |
'Light Dusting' Of Ash As Alaska Volcano Erupts
Alaska's Mount Redoubt volcano has erupted four times since Sunday night, sending an ash plume more than 9 miles high into the air — but Anchorage, the state's largest city, has likely been spared from any ashfall.
"The ash cloud went to 50,000 feet, and it's currently dr... | <urn:uuid:a16641dc-aa08-4d9d-b166-43f2d4452dce> | 2.875 | 253 | Truncated | Science & Tech. | 58.372967 |
The sun is a very active place. The circular feature shooting out from the sun is an eruption. The little picture of Earth has been placed next to this eruption to show how big these eruptions are. (Earth is not really that close to the sun!) The sun is bright orange in this view. It was taken in the extreme ultraviole... | <urn:uuid:930cb279-4ff6-4a4c-a9f6-93fcc86437a8> | 3.84375 | 133 | Knowledge Article | Science & Tech. | 57.769903 |
You may recall a scene from "Star Wars" where Luke Skywalker looks out across the landscape of a planet called Tatooine, which had two suns. This year, amateur scientists discovered that in reality, there is a planet with not just two, but four, suns.
This planet, called PH1, is special for another reason: It's the fir... | <urn:uuid:896f1c83-39ba-473e-879a-4e207759d2f7> | 3.421875 | 997 | Listicle | Science & Tech. | 54.330324 |
Editor's note: The Science Seat is a feature in which CNN Light Years sits down with movers and shakers from many different areas of scientific exploration. This is the first installment.
Jason Kalirai is the deputy project scientist for the James Webb Space Telescope, which will be NASA's next big mission in astrophys... | <urn:uuid:3e1d457b-40e9-4893-9f74-0459fd838b37> | 3.03125 | 1,344 | Audio Transcript | Science & Tech. | 48.38367 |
12:07 01 February 2010
The songs of whales and dolphins can be beautiful to the ear. Now acoustics engineer Mark Fischer has created a way to make them visually pleasing too. What's more, his technique captures more information about the sound than traditional ways of visualising whalesong.
Image 1 of 10
Humpback whale... | <urn:uuid:dcacea23-5f3e-41f1-99a4-21ead567cfdb> | 3.453125 | 144 | Truncated | Science & Tech. | 49.354286 |
|Ocean Dumping and Ship Wastes||
Maintained by IMO
|This topic deals with ocean dumping and ship wastes, deliberately dumped under controlled conditions. It includes nuclear waste disposal, sewage outfalls, land-based materials or those that derive from shipping, such as from cargo transport ships and passenger ships. ... | <urn:uuid:cf2114d5-1961-4f51-bc92-efcbf6b6f61c> | 3.765625 | 608 | Knowledge Article | Science & Tech. | 22.149579 |
Egg Drop - Newton's Law of Inertia
Demonstrate gravity, motion, and other forces with this incredible science trick.
The Egg Drop is a classic science demonstration that illustrates Newton's Laws of Motion, namely inertia. The challenge sounds so simple... just get the egg into the glass of water, but there are a few o... | <urn:uuid:6f571732-5901-4217-afc9-0ade92ca96f6> | 3.640625 | 1,161 | Tutorial | Science & Tech. | 73.010048 |
A map of Earth's tectonic plates. Plate boundaries are shown in red. Learn more about the geologic features related to Earth's tectonic plates at This Dynamic Planet
Click on image for full size
Modified from USGS
Many forces change the surface of the Earth over time. The largest force that changes our planetís surface... | <urn:uuid:f97fd6c0-59d7-43e2-aea6-cbd8ff58e08c> | 4.25 | 545 | Content Listing | Science & Tech. | 61.490923 |
What's news in science? Sensor System Runs On Electricity Generated By Trees. For my study of what's new, and news worthy in today's modern science, I found a couple articles, describing that MIT is constructing a new type of sensor on trees that detect several amounts of data. This is particularly important due to the... | <urn:uuid:e9bd421c-e574-444d-9851-8ee53ace9bc1> | 2.984375 | 1,392 | Personal Blog | Science & Tech. | 37.227456 |
Want to have an anxiety attack? Think about this. This should put things in perspective for us.
The Ogallala aquifer is located under the Great Plains, covering parts of eight states including: Texas, New Mexico, Oklahoma, Kansas, Colorado, Wyoming, Nebraska and South Dakota. This area is considered the breadbasket of ... | <urn:uuid:1296e90d-1f3b-4a11-b61e-44579127e5b7> | 3.078125 | 247 | Comment Section | Science & Tech. | 51.258044 |
A space station is a man-made structure that is designed for people to live on. A space station is distinguished from other manned spacecraft by its lack of major propulsion or landing facilities - instead, other vehicles are used as transport to and from the station. Space stations are designed for medium-term living ... | <urn:uuid:20c6fb18-3fc4-4a39-8c21-c66927d55aeb> | 3.796875 | 1,285 | Knowledge Article | Science & Tech. | 30.718469 |
DNA-RNA triplex formation is well-documented. It was originally analysed in simple model polynucleotides where the DNA has a polypurine strand and the RNA has a polypyrimidine, e.g.
but it is now known to occur in more complex sequences. One of the best studied examples is in the promoter of the human DHFR gene:
Gee, J... | <urn:uuid:fa7336d3-e559-4aa6-88ab-86ac03a89f53> | 3.171875 | 349 | Q&A Forum | Science & Tech. | 59.54096 |
A pest-eating ladybug attacks an aphid.
As angry debates about genetic modification continue, GM crops are quietly going about their business—and producing some positive side effects. In China, with Bt cotton reducing the need for insecticides, pest-eating bugs have rebounded and brought natural pest control with them.... | <urn:uuid:81bff8c7-9749-4f2e-a739-2be93e3090d6> | 3.0625 | 614 | Personal Blog | Science & Tech. | 34.53291 |
This is an introduction to the Cobra programming language. It assumes you already know one or more high level languages such as Python, C#, Java, C++, Visual Basic, PHP, Ruby, etc.
Cobra is an imperative, high-level, object-oriented language with direct support for contracts, unit tests and compile-time nil tracking. I... | <urn:uuid:cc70db51-5bb5-4aa9-aabf-dbfbf9d6c5df> | 2.765625 | 1,162 | Documentation | Software Dev. | 58.511833 |
The reproductive biology of rare rangeland plants and their vulnerability to insecticides
Gary L. Cunningham
United States Department of Agriculture Animal and Plant Health Inspection Services
Ecology & conservation
Tepedino, V.J. 2000. The reproductive biology of rare rangeland plants and their vulnerability to insect... | <urn:uuid:903cb8b9-f05e-4361-a87f-d6ff874e0a47> | 2.734375 | 175 | Truncated | Science & Tech. | 39.849832 |
Desiccation is the state of extreme dryness, or the process of extreme drying. A desiccant is a hygroscopic (attracts and holds water) substance that induces or sustains such a state in its local vicinity in a moderately sealed container.
A desiccator is a heavy glass or plastic container used in practical chemistry fo... | <urn:uuid:e70e211a-1c0d-400e-a8a1-66ce5bd523bc> | 4.15625 | 428 | Knowledge Article | Science & Tech. | 35.816659 |
Hypernova and Gamma Ray Bursts
Nova last night was on Hypernovae (the web site is here but is only so so). A hypernova is a supernova for a specific type of star (a "Wolf-Rayet") that is very hot and massive. When it dies, the core of the star doesn't just burn but collapses in on itself creating a blackhole at the cen... | <urn:uuid:2dd8ae03-c7a8-449a-a3e8-a7860691bf31> | 3.0625 | 204 | Personal Blog | Science & Tech. | 61.625227 |
Manual Section... (3) - page: tgamma
NAMEtgamma, tgammaf, tgammal - true gamma function
double tgamma(double x);
float tgammaf(float x);
long double tgammal(long double x);
Link with -lm.
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
DESCRIPTIONThe Gamma function is defined by
Gamma(x) = integ... | <urn:uuid:685864d0-c5a4-40e9-931b-9859bdd45346> | 2.96875 | 755 | Documentation | Software Dev. | 57.602456 |
In this section you will learn about the getLocalHost() method to print the Host name as well as the IP Address of the local system. For do for the same we have to call InetAddress class then we need to create a object, in which we store the local host information. Then after we use the print command to print the store... | <urn:uuid:5ff8e50c-aaa9-4ce9-b700-ebbffb02e40f> | 3.09375 | 201 | Documentation | Software Dev. | 72.948671 |
This computer image shows seven cosmic ray
muons (yellow lines) going through the detector simultaneously.Charged
particles like these emit a cone of Cherenkov light which
travels through the water and hits the photomultiplier tubes (PMT's)
covering the six walls of the detector. Each slash represents
one Cherenkov pho... | <urn:uuid:efda360a-3ee1-4fc5-ba53-f71c3a8935d0> | 3.890625 | 1,801 | Knowledge Article | Science & Tech. | 60.22252 |
Science subject and location tags
Articles, documents and multimedia from ABC Science
Thursday, 7 July 2011
One of the most violent weather events in the Solar System is still enthralling astronomers now.
Wednesday, 6 July 2011
StarStuff Podcast The launch of Space Shuttle Atlantis is the last for the space shuttle pro... | <urn:uuid:115148c2-1d63-4398-80b9-b6c0c3dde107> | 2.953125 | 642 | Content Listing | Science & Tech. | 50.199776 |
On 10/29/07, Tom Phoenix <tom@xxxxxxxxxxxxxx> wrote:
> An array is the kind of variable which holds
> a list; a list is the kind of data which is stored in an array. You
> can use the list contained in an array, and you can store a list into
> an array. But the array is the container, and the list is the
I do agree wit... | <urn:uuid:fa2e98c7-f692-41d2-b8b3-43be40e0da84> | 2.875 | 130 | Comment Section | Software Dev. | 78.210727 |
Nitrogen fixation refers to the conversion of atmospheric nitrogen gas (N 2 ) into a form usable by plants and other organisms. Nitrogen fixation is conducted by a variety of bacteria, both as free-living organisms and in symbiotic association with plants. Because it is the principal source of the nitrogen in the soil,... | <urn:uuid:d1431faf-af4e-4d26-ae0c-06e9ff71f3b8> | 4.15625 | 771 | Knowledge Article | Science & Tech. | 30.139451 |
Earthquakes can have a silver -- or rather golden -- lining. Some six miles underground, water can contain trace amounts of gold and silica. When an earthquake occurs, voids along a geological fault widen suddenly, pressure plummets, and the water held inside turns to steam. Meanwhile, the gold and silica in that water... | <urn:uuid:d7073da1-0cbf-4f48-ac68-be547b355521> | 3.828125 | 221 | Truncated | Science & Tech. | 46.188216 |
In the great stellated dodecahedron and the small stellated dodecahedron, the faces are pentagrams. It is easier to see which parts of the exterior belong to which pentagram if you look at a six-colored model of the great stellated dodecahedron and a six-colored model of the small stellated dodecahedron. The center of ... | <urn:uuid:ed0f3194-cd54-4918-a656-d9af5c0fabdb> | 3.859375 | 542 | Tutorial | Science & Tech. | 35.206238 |
Unit 3: Gravity
Although by far the weakest of the known forces in nature, gravity pervades the universe and played an essential role in the evolution of the universe to its current state. Newton's law of universal gravitation and its elegant successor, Einstein's theory of general relativity, represent milestones in t... | <urn:uuid:b3e20afc-7d44-4e54-9a28-72270955b9f4> | 4.0625 | 243 | Knowledge Article | Science & Tech. | 22.43801 |
The following HTML text is provided to enhance online
readability. Many aspects of typography translate only awkwardly to HTML.
Please use the page image
as the authoritative form to ensure accuracy.
Natural Climate Variability on Decade-to-Century Time Scales
will be presented. For information on snowfall and its long... | <urn:uuid:55bcd30c-3d27-4153-87fe-4dd66f2dc4e3> | 3.046875 | 1,244 | Knowledge Article | Science & Tech. | 40.699545 |
|Biologist Barry Sinervo holds a pregnant mesquite lizard.
Sinervo led an international team of biologists who conducted the study, published in the May 14 issue of Science. The researchers surveyed lizard populations, studied the effects of rising temperatures on lizards, and used their findings to develop a predictiv... | <urn:uuid:c4fb81d6-6826-49cd-b23f-3c6e49d6d3a6> | 3.828125 | 1,349 | Knowledge Article | Science & Tech. | 29.864171 |
Lenticular clouds above mountains surrounding Death Valley. (Photo credit: Eastcott Momatiuk/Thinkstock)
Few things are more captivating to meteorologists than seeing a stunning cloud right outside the front door. Particularly, one of these ten spectacular clouds.
Lenticular clouds are most common near or downwind of m... | <urn:uuid:cd55c2f5-ef70-46b2-95b9-3e647428fc99> | 3.234375 | 213 | Listicle | Science & Tech. | 50.173799 |
Congo clawless otters are found in the lower Congo basin, which lies between southeastern Nigeria and western Uganda. (Estes, 1991; Haltenorth and Diller, 1980; Kingdon, 1982; Nowak, 1999; Estes, 1991; Haltenorth and Diller, 1980; Kingdon, 1982; Nowak, 1999)
Congo clawless otters reside exclusively in the small swamps,... | <urn:uuid:d76b1f6e-d25d-4975-b64a-06a28d4188c2> | 3.46875 | 2,965 | Knowledge Article | Science & Tech. | 40.707536 |
Rotate an image by 90-degree increments
#include <img/img.h> int img_rotate_ortho( const img_t *src, img_t *dst, img_fixed_t angle );
- The image to rotate
- The address of an img_t describing the destination. If you don't specify width or height (or both) in the dst then this function will calculate the missing dimens... | <urn:uuid:01a3a9bf-2381-46ca-aaa8-878b77771247> | 2.921875 | 371 | Documentation | Software Dev. | 49.870136 |
MSI-SuperDARN Radars | Spacecraft Shielding | Ionospheric Convection | GICs | Publications
Scientists at four institutions (Virginia Tech, Dartmouth College, the University of Alaska Fairbanks, and the Johns Hopkins University Applied Physics Laboratory) will build eight (8) SuperDARN-style HF radars at middle geomagne... | <urn:uuid:1cbf4ae7-9766-4b56-ac91-93959785f7ba> | 3.203125 | 2,487 | Knowledge Article | Science & Tech. | 63.492245 |
We recommend that you upgrade your browser. The following is a list of popular options:
Berkeley Lab is a leader in investigating the complex coupled effects of thermal, hydrological and chemical processes driven by the heat generated from radioactive waste decay. In collaboration with other national laboratories, Berk... | <urn:uuid:5108f68a-90ff-42e8-924b-c6c8fb04b746> | 2.75 | 428 | Knowledge Article | Science & Tech. | 20.923619 |
The sites of the first detailed account of Cyanophyta in the Ross Sea Region (West and West, 1911) collected by Shackleton's 1907-09 expedition were revisited and detailed descriptions of Oscillatoriaceae (the most abundant family of Cyanophyta) occurring in abundance as thick felts covering the bottom of ponds, lakes ... | <urn:uuid:389325dc-27fa-436e-b3ee-e5fef61c1118> | 3.21875 | 341 | Knowledge Article | Science & Tech. | 33.386197 |
Tuesday, April 27, 2010
Guess What Else the Devils Hole Pupfish have had to put up with over the last 20,000 years?
I wrote about the precarious existence of the Devils Hole Pupfish a few months ago. The highly endangered fish live in a single cavern opening in the Death Valley region in water that is at a constant 92 ... | <urn:uuid:64edbc0e-8074-4cd2-bd85-713c837e4977> | 3.21875 | 343 | Personal Blog | Science & Tech. | 48.038055 |
an element a of a group is the smallest positive integer m such that a^m = e (where e denotes the identity element of the group, and a^m denotes the product of m copies of a). If no such m exists, we say that a has infinite order. All elements of finite groups have finite order.
can some1 give me an easy examples using... | <urn:uuid:744383e6-79f8-4fc0-bba0-1f8c55d41a72> | 3.5625 | 82 | Q&A Forum | Science & Tech. | 59.755357 |
I am trying to solve this problem, but getting nowhere, any help would be greatly appreciated!
What is the net gravitational force exerted on a 3.00 X 10^4 kg spaceship halfway between the Earth and the Moon. The average distance between the Earth and the Moon is 384,000 km. The Earth's mass is 5.98 X 10^24 kg, and the... | <urn:uuid:ae0a7c28-3054-4858-8c00-6b4e04b9b4dd> | 2.6875 | 95 | Q&A Forum | Science & Tech. | 105.831058 |
"How to address this student misconception? Atmosphere is necessary to create gravity"
My gut-response tweeting at the time was this:
"Engage with it: Ask them to elaborate on their idea... ask them draw pictures, to help explain how it works..."Now I've had time to digest it a bit more
followed by, "There is a meaning... | <urn:uuid:17e0a989-94d7-4d9d-8305-8793fca7ca50> | 3.328125 | 1,092 | Personal Blog | Science & Tech. | 47.277559 |
GLORIA – Global Observational Research in Alpine Environments
The Himalaya are experiencing the most drastic global climate change outside of the poles with predicted temperature increases of 5-6oC, 20-30% increase in rainfall, and rapid melting of permanent snows and glaciers. We have established a 1500km trans-Himala... | <urn:uuid:a41cf482-b351-459a-ab17-a8c41bf2e87f> | 3 | 606 | Academic Writing | Science & Tech. | 23.338504 |
Climate Witness: Leonor Corral, Philippines
I have lived in El Nido most of my life and am a living testament to how the years have changed it. Before, we had a defined dry and wet season. Typhoons never reached our area. We always had fish and squid in abundance and boasted of a water system that reached all families ... | <urn:uuid:8f10ac95-acc6-4ceb-9977-4172c68ba11a> | 2.953125 | 629 | Knowledge Article | Science & Tech. | 42.489159 |
The planet candidate around HD 100546 was detected as a faint blob located in the circumstellar disk revealed thanks to the NACO adaptive optics instrument on ESO’s VLT, combined with pioneering data analysis techniques. The observations were made using a special coronagraph in NACO, which operates at near-infrared wav... | <urn:uuid:8d6a8e40-45a4-437e-9384-7a73fbe894e7> | 2.984375 | 451 | Content Listing | Science & Tech. | 23.743051 |
A list of numbers that follows a rule is called a sequence. Sequences whose rule is the addition of a constant are called arithmetic sequences, similar to geometric sequences that follow a rule of multiplication. Homework problems on arithmetic sequences often ask us to find the nth term of a sequence using a formula. ... | <urn:uuid:a4518761-a860-47e6-b090-9166d3f3334f> | 4.28125 | 656 | Tutorial | Science & Tech. | 75.538554 |
Consider a point charge centered at the orgin surrounded by a ring charge in the xy plane. The point charge has a volve Q. The ring has charge density P and radius A.
A) Use coulomb's law to find the electric field at point, P(0,0,h) above the charge distribution.
B) Derive an equatio for the voltage as a function of h... | <urn:uuid:6e46241a-b66f-4c5d-b714-f658e9a72cfe> | 2.984375 | 132 | Q&A Forum | Science & Tech. | 73.869318 |
1.Climate change refers to a long-term shift in weather conditions. It is measured by changes in a variety of climate indicators (e.g. temperature, precipitation, wind) including both changes in average and extreme conditions. Climate change can be the result of natural processes and/or human activity.
2.Over most of E... | <urn:uuid:9eaa0054-58ec-4137-a6a3-eead0a42f3c3> | 4.03125 | 1,048 | Knowledge Article | Science & Tech. | 32.902189 |
The ecological footprint is a measure of the area needed to support a population's lifestyle. This includes the consumption of food, fuel, wood, and fibres. Pollution, such as carbon dioxide emissions, is also counted as part of the footprint. Biocapacity measures how biologically productive land is. It is measured in ... | <urn:uuid:3a6bd830-3ead-44a9-be83-f1804aa70663> | 3.171875 | 163 | Knowledge Article | Science & Tech. | 28.290316 |
Spongilla lacustris Spicule
This is from a core sample collected in Lake Washington, Seattle, Washington.
Transmitted Brightfield Illumination
Spongilla lucustris is a freshwater sponge that is distributed widely around the world. It possesses megasclere,
microsclere, and gemmule spicules.
Significance in the Environme... | <urn:uuid:9e67cefc-1200-47b0-94b3-ecf9d9e17ebe> | 3.296875 | 286 | Knowledge Article | Science & Tech. | 55.134167 |
This example explores how to find the day of a month and the day of a week This example sets the year as 2007 and the day as 181. The example finds the day of a month and the day of a week by using get(field_name) method.
The Calendar class extends Object class. It is an abstract base class and converts a Date object i... | <urn:uuid:7488c201-8fa3-4361-ba43-9c0ccbb3ce5f> | 3.796875 | 329 | Documentation | Software Dev. | 61.611743 |
This picture shows geysers near Triton's South Pole. The geysers shoot dark material high into Triton's atmosphere. This dark plume settles back down to Triton's surface. Scientists think we can tell which way the wind blows on Triton because of this! Do you see how the geyser plumes point from lower-left towards upper... | <urn:uuid:44eda012-d043-4457-b159-1990563d797e> | 2.859375 | 120 | Truncated | Science & Tech. | 70.776429 |
A rise in global population as well as industrial and technological advancements in today’s world poses a serious threat to the future of our energy resources. With the impacts of climate change rapidly increasing every second, the international and even local communities are now initiating and going the extended mile ... | <urn:uuid:2dfb3121-0024-452c-be97-7bcd3d68b3ea> | 3.375 | 328 | Truncated | Science & Tech. | 35.099357 |
Short Summaries of Articles about Mathematics
in the Popular Press
"Gas on the Brain," by Clive Davidson. New Scientist, 3 October 1998, pages 37-39.
Neural computers are coming of age. They have medicaland financial applications, and they're likely to takecommand of the Space Shuttle when it docks with theInternationa... | <urn:uuid:fc17e6c7-b2a1-499d-92a8-ca52cc4336ce> | 2.84375 | 211 | Content Listing | Science & Tech. | 26.620314 |
A titrationThe gradual addition of one solution to another until the chemical amount of one reactant being added matches stoichiometrically the amount of another reactant in the solution initially present. is a volumetric technique in which a solutionA mixture of one or more substances dissolved in a solvent to give a ... | <urn:uuid:be45f762-7bf3-4a93-a7f5-6a832ec41afb> | 3.890625 | 2,305 | Tutorial | Science & Tech. | 44.588892 |
Page 1 of 4
When you first use Visual Basic there is a great deal of pleasure to be had from the way you can draw a button on a form and start writing event handling code that makes the button do something.
Visual Basic has a lot of controls that you can use to build a user interface. As you progress you discover that ... | <urn:uuid:989c4417-af21-4e5e-b12f-38d956b80652> | 3.640625 | 977 | Tutorial | Software Dev. | 55.711043 |
I know that a capacitor with a dielectric can operate normally up till a certain voltage (AFAIK called breakdown voltage) which depends on the strength of the dielectric placed between the plates. After this voltage, the circuit becomes short and current flows between the plates and thus the capacitor breaks down. But ... | <urn:uuid:078cb218-9a51-4f75-a2f2-5398a5ace244> | 3.5625 | 395 | Q&A Forum | Science & Tech. | 32.332394 |
|Paired male (above) and female (below)|
|Silkworm, 4th or 5th instar|
Bombyx mori mori
The Silkworm (Bombyx mori) is the larva or caterpillar of a moth that is important because it makes silk. It is entirely dependent on humans and no longer lives in the wild; silk has been made for at least 5000 years in China. Silkw... | <urn:uuid:d81fd551-5efc-45a5-aacb-823d44a6d974> | 3.71875 | 815 | Knowledge Article | Science & Tech. | 65.611826 |
Function - Copy a region of virtual memory.
[in task send right]
The port for the task whose memory is to be copied.
The starting address for the source region. The address must
be on a page boundary.
The number of bytes in the source region. The number of
bytes must convert to an integral number of virtual pages.
The ... | <urn:uuid:d6f1db4e-03fb-496f-b1fb-0c6ca6f1667a> | 3.46875 | 222 | Documentation | Software Dev. | 46.767897 |
The development of the small guns began well before the beginning of the HARP Project. Some of the first experiments were conducted by Dr. Gerald Bull at the Canadian Armament and Research Development Establishment (CARDE) in the mid-fifties using guns as small as small as 76 mm. By the late fifties Dr. Bull's work had... | <urn:uuid:5c41f6c0-6f62-4f04-ba35-79c526c391d7> | 3.453125 | 884 | Knowledge Article | Science & Tech. | 61.869774 |
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.
The dust is accompanied by gas, which is thinly dispersed among the stars, filling the space between them. This interstellar gas consists mostly o... | <urn:uuid:04e027d4-5af5-4cbb-9645-10ea41293b68> | 3.671875 | 127 | Knowledge Article | Science & Tech. | 57.593956 |
(click image to enlarge)
The climate is an incredibly complex and chaotic "system" that has billions, if not trillions, of annual/decade/century inputs that affect Earth's climate. In addition, scientists have little understanding of both the major and minor factors that impact climate; and, the climate modelers can on... | <urn:uuid:70cd3f48-c9f4-4ca6-b924-7b61d8715984> | 3.0625 | 364 | Listicle | Science & Tech. | 42.89875 |
In Fig. 20-60, determine the magnitude and direction of the
magnetic field at the midpoint of the side of the triangle between
wire M and wire N. The current in wires N and P is 8.80 A into the
page and the current in wire M is 8.20 A out of the page.
1 T at 2° (counterclockwise from the +x axis, which points to
the ri... | <urn:uuid:b97bc793-0645-4143-90e7-9e95d96d32b8> | 2.984375 | 94 | Tutorial | Science & Tech. | 90.032438 |
Gray Wolf (Canis lupus)
Second only to humans in adapting to climate extremes, gray wolves once ranged from coast to coast and from Alaska to Mexico in North America. They were absent from the Southeast, which was occupied by red wolves (Canis rufus), and from the large deserts of the Southwest. By the early 20th centu... | <urn:uuid:b413778d-f5ad-476b-b043-6b57986b5d15> | 4.125 | 1,398 | Knowledge Article | Science & Tech. | 43.875081 |
Amphorides (Amphorella) quradrilineata
Description: A common tintinnid ciliate in Mediterranean. It is about 150 microns long. Like other tintiinids, the ciliate cell which resembles an oligotrich ciliate is inside a shell or lorica. Tintinnids feed on phytoplankton, microscopic algae and in turn serve as food for larg... | <urn:uuid:8455b540-3b06-44cb-84e1-588deda7db00> | 2.703125 | 184 | Truncated | Science & Tech. | 50.408947 |
NOISE nuisance from aircraft can be reduced significantly by changing the way the planes come in to land. Lining up with the runway as far as 70 kilometres away and making a steady descent can more than halve the acoustic energy that reaches the ground, an international research consortium has found. Now pressure is on... | <urn:uuid:86fd4efc-aa36-430a-8b22-52167be15838> | 3.578125 | 208 | Truncated | Science & Tech. | 47.714052 |
Fabius-Pompey Central School
Fabius-Pompey Central School students and high school chemistry teacher, Tim Bloom, examine the contents of their net to see what kind of macroinvertebrates they caught in Fabius Brook.
Ten students and two teachers participated in the stream survey.
Other students look at their results for... | <urn:uuid:53aee2d9-706b-4e38-994c-5b5b033749a7> | 2.765625 | 146 | Truncated | Science & Tech. | 46.553872 |
Aug. 5, 2009 The Naval Research Laboratory's satellite suite, the Atmospheric Neutral Density Experiment 2 (ANDE-2), was deployed from NASA's Space Shuttle Endeavour on July 30, 2009.
The ANDE-2 satellite suite consists of two nearly perfectly spherical micro-satellites with instrumentation to perform two interrelated ... | <urn:uuid:c05c62b7-b1b5-4d60-a306-e4be18db6210> | 3.3125 | 232 | Knowledge Article | Science & Tech. | 33.948311 |
Image: Image generated by Tom Bartol Salk Institute for Biological Studies in collaboration with Justin Kinney, Dan Keller, Chandra Bajaj, Mary Kennedy, Joel Stiles, Kristen Harris and Terry Sejnowski
More In This Article
If you could pause time for an instant and make yourself small enough to discern individual molecu... | <urn:uuid:4f34963d-1e46-4833-bd70-37ca15dbcccf> | 3.328125 | 304 | Truncated | Science & Tech. | 22.695 |
The ongoing disruption of the earth’s climate by man-made greenhouse gases is already well beyond dangerous and is careening toward completely unmanageable. Under midrange projections for economic growth and technological change, the planet’s average surface temperature in 2050 will be about two degrees Celsius (3.6 de... | <urn:uuid:cf43b4f3-1ff4-497f-9b21-fab837b5624c> | 3.03125 | 810 | Nonfiction Writing | Science & Tech. | 39.748904 |
At the recent AAAS meeting, Stony Brook University’s Robert Crease talked about a doomsday scare involving Scientific American and Brookhaven National Lab’s Relativistic Heavy Ion Collider, or RHIC:
“As the accelerator neared completion in 1999, Scientific American ran an article about RHIC, called ‘A Little Big Bang,’... | <urn:uuid:ad40dd44-5662-4c2e-a5aa-51e94fa8821b> | 2.984375 | 250 | Truncated | Science & Tech. | 38.948196 |
Follow posts tagged #ontario, #toronto, and #earthquake in seconds.Sign up
Billion-Year-Old Water Preserved in Canadian Mine
Pockets of water trapped in rocks from a Canadian mine are over a billion years old, and the water could contain life forms that can survive independently from the sun, scientists said this week.... | <urn:uuid:942faffc-dff5-4f2b-a46a-7124b7de0705> | 3.359375 | 247 | Content Listing | Science & Tech. | 55.643411 |
Dieldrin is nonpolar and, therefore, has a strong affinity for organic matter and sorbs tightly to soil particulates based on its log Koc of 6.67. Volatilization is the principal loss process of dieldrin from soil. The process is relatively slow due to its low vapour pressure and strong sorption to soil. It may also be... | <urn:uuid:f63b5d74-1b20-42c0-aba6-ea81aaaa744c> | 3.109375 | 350 | Knowledge Article | Science & Tech. | 37.242455 |
|| Home. | Universe Galaxies And Stars Archives. | |
|| Universe | Big Bang | Galaxies | Stars | Solar System | Planets | Hubble Telescope | NASA | Search Engine ||
STEREO spacecraft Set for Launch.
Get set to see the Sun... in thrilling 3-D! At the end of August, NASA will launch its twin STEREO spacecraft into orbit ... | <urn:uuid:3bae77a5-c8b0-4224-9f97-de99ab4a659b> | 3.078125 | 1,484 | Content Listing | Science & Tech. | 45.069366 |
Since NASA announced the Greenland ice sheet recently experienced “unprecedented” (in 30+ years of satellite measurements) ice sheet surface melt, countless news reports, commentaries and critiques have attempted to explain what it means.
Many have suggested the melting observed over 97 percent of Greenland’s ice sheet... | <urn:uuid:7fb4b7f6-a898-4262-97f7-c865c3700fc0> | 3.796875 | 1,627 | Nonfiction Writing | Science & Tech. | 42.592824 |
COPYRIGHT T. M. BAUGH, USED BY PERMISSION
Figure 1. The tiny Devils Hole pupfish is less than an inch (2.5 cm) long but has played a big role in native species conservation.
The diminutive Devils Hole pupfish (Cyprinodon diabolis, fig. 1) in Death Valley National Park (California and Nevada) has played an outsized role... | <urn:uuid:67cc42e7-62d7-49e6-8e29-cdadc9d9a270> | 3.59375 | 309 | Truncated | Science & Tech. | 58.683832 |
15 Aug 2012:
Wildlife Vanishing in Brazil’s
Fragmented Atlantic Forest, Study Says
The fragmentation of tropical forests in eastern Brazil as a result of agricultural expansion and other human activities has decimated biodiversity even within the pockets of forest that still remain, a new study has found
. Using wildli... | <urn:uuid:fd9b46a7-44f8-4d08-ab3b-0be66b610aa1> | 3.140625 | 543 | Truncated | Science & Tech. | 26.065364 |
has the same result as us--
, but when it is used in a comparison, the --
means that C will decrement the value FIRST, before the comparison, while --
means that C will decrement the value AFTER the comparison. If you use it us--;
alone, both give the same result. You may say why the creators of C placed such ambiguous... | <urn:uuid:9c4e55ce-f9b5-4b02-9760-59fb8bd5e497> | 2.984375 | 212 | Comment Section | Software Dev. | 59.264505 |
Manual Section... (2) - page: fallocate
NAMEfallocate - manipulate file space
#define _GNU_SOURCE #include <fcntl.h> int fallocate(int fd, int mode, off_t offset, off_t len);
DESCRIPTIONThis is a nonportable, Linux-specific system call. For the portable, POSIX.1-specified method of ensuring that space is allocated for ... | <urn:uuid:023f9339-fb34-405b-a5c6-6e3fe83fbcb3> | 2.953125 | 681 | Documentation | Software Dev. | 51.575518 |
A lot of energy, yes, but for a very short period of time.
Given that the cost of the entire prototype program is vastly less than the cost of a Shuttle launch, it is safe to assume(!) that the per-kilo cost to orbit is substantially less via railgun.
In addition, given that the payload is launched by a single initial ... | <urn:uuid:560985c9-4fde-4632-9baf-822f8a9da3ff> | 2.765625 | 211 | Comment Section | Science & Tech. | 52.262214 |
Additional CO2 and warmer weather will help plants, the climate change denialists say. That’s not what we see, however. Turns out CO2 helps weeds, and warmer weather helps destructive species, more than it helps the stuff we need and want in the wild.
For example, the white-bark pine, Pinus albicaulis:
From American Fo... | <urn:uuid:7a862ec8-fbd4-4ec8-98e3-f6a0d406a145> | 3.15625 | 346 | Personal Blog | Science & Tech. | 34.533411 |
How fast are larval fishes?
Contrary to a previously held notion that larval (baby) fishes are at the mercy of ocean currents, many larval reef fishes are in fact very strong swimmers and can swim surprisingly fast.
The average 1cm long fish larva swims at 20 cm/sec (14 body lengths/sec). To put these figures into pers... | <urn:uuid:39d893f6-63b9-4d9c-b740-cf22c268a823> | 3.203125 | 191 | Knowledge Article | Science & Tech. | 63.5235 |
Late Thursday night, we finally received our first marine sediment core, in the form of a Jumbo Kasten Core from the Vega Drift. For Professor McCormick’s marine microbiology team this meant the start of a long couple of days. The first deployment of the Kasten Core equipment by the Marine Technicians, resulted in a co... | <urn:uuid:7f526e83-488c-4ac4-80f4-19db1af438ad> | 3.296875 | 2,776 | Personal Blog | Science & Tech. | 44.267204 |
Proc and Lambda are used to create code blocks. After creating them, we can pass them around our code, just like variables.
But there are 2 significant differences we have to keep in mind.
1. Suppose a Proc or a lambda is used to create a code block inside of a method. If the Proc/Lambda has a return statement inside o... | <urn:uuid:a3e76f23-6553-4b02-aa53-776b7e4a9822> | 3.546875 | 481 | Personal Blog | Software Dev. | 63.261751 |
chemistry question #88
Nick Hiebert, a 23 year old male from the Internet asks on November 14, 1999,Q:
Is there a substance known to science that reacts to electrical impulses by contracting or changing its density?
viewed 12715 times
There may be many such things. One thing I'm aware of are piezoelectric materials tha... | <urn:uuid:aa70846a-9361-425d-8e6c-351aec567b53> | 2.796875 | 157 | Q&A Forum | Science & Tech. | 70.772226 |