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
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An unornamented, thickened area in the central portion of a valve in the genus Stauroneis. Some references consider fascia and stauros as equivalent terms, although recent work (Cox 1999, 2001, 2012) has shown that the stauros has a distinct pattern of development that differs from that of other genera. During valve fo... | <urn:uuid:ca97cddd-b890-4504-bd70-cdb98315cbf3> | 3.0625 | 341 | Structured Data | Science & Tech. | 64.22378 |
The first identified compact galaxy group,
is featured in
this eye-catching image constructed with data drawn from
the extensive Hubble Legacy Archive.
About 300 million light-years away, only four of these five galaxies
in a cosmic dance
of repeated close encounters.
The odd man out is easy to spot, though.
The intera... | <urn:uuid:4a7cf827-9ea9-42e7-b12e-164307a0fa9c> | 2.859375 | 249 | Knowledge Article | Science & Tech. | 50.076217 |
So, what happened to the mass?
So, we need a massive disk to build the KBOs, but then we cannot get rid of it.
- Dynamical excitation: Something excited the KB feeding most of mass inward.
- There have been three suggestions:
- ~Earth-mass objects scattered outward by Neptune.
(Morbidelli & Valsecchi; Petit et al.)
- U... | <urn:uuid:e62b159c-b0ce-4645-a7cf-353bb0e8a796> | 2.875 | 268 | Q&A Forum | Science & Tech. | 57.580519 |
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.
role in evolution theory
In some modes of speciation the first stage is achieved in a short period of time. These modes are known by a variety of ... | <urn:uuid:21dc32bd-dd62-4956-bcbb-98475ab56224> | 3.140625 | 137 | Truncated | Science & Tech. | 50.69079 |
In July 2008, Chabot Space & Science Center's 36-inch telescope, Nellie, was officially designated Observatory G-58 by the International Astronomical Union's Minor Planet Center (MPC), and selected to contribute to its Near Earth Object (NEO) detection and tracking program.
In this program, observatories around the wor... | <urn:uuid:5f38c839-1ad6-4d8b-8532-579e49cd29be> | 3.671875 | 543 | Knowledge Article | Science & Tech. | 35.732786 |
Firestorm: Weather on a Neutron Star
by Steven Whitt
Imagine yourself in a sea of molten iron. A cloud of superhot gas spirals overhead. Moments later, that same cloud explodes with the fury of billions upon billions of hydrogen bombs. The explosion drives the molten sea into a frenzy, stirring up storm waves that will... | <urn:uuid:f1366c71-51b8-4dec-be3a-eed1d1e8e5c1> | 4.125 | 775 | Truncated | Science & Tech. | 58.661048 |
Got a question about the Higgs boson, Cern or the Large Hadron Collider, but been too afraid to ask? As we report live from Geneva on scientists' latest efforts to find the 'God particle', two leading physics professors came online to take your questions.
Professor Stefan Soldner-Rembold, professor of particle physics ... | <urn:uuid:8ef17ef3-578d-41fa-8eb4-87f331209a97> | 2.734375 | 702 | Audio Transcript | Science & Tech. | 47.045779 |
It is probably safe to say that nobody has ever friended a cockroach on Facebook, but its will to survive isn’t dependant on social networking or welcome mats. The cockroach family (Blattidae) was prolific 350 million years ago and is found all over the world today. When we see a cockroach, it’s probably in someone’s h... | <urn:uuid:bc2e491b-f0a6-401d-8d27-be4f12bba5f1> | 3.65625 | 611 | Nonfiction Writing | Science & Tech. | 52.847264 |
This section is different from the others. Most other sections of this document talks about a particular SQL command. This section does not talk about a standalone command but about "expressions" which are subcomponents of most other commands.
SQLite understands the following binary operators, in order from highest to ... | <urn:uuid:c8f5bfce-2845-476a-84ac-7411a0dc4082> | 3.125 | 3,811 | Documentation | Software Dev. | 44.22742 |
1. The Living Machine
Plate tectonics, one of the most important discoveries of the 20th century, is explored at such
sites as the erupting Kilauea volcano and the bottom of the Atlantic Ocean in the submersible
2. The Blue Planet
Perhaps the last great unexplored frontier on earth, the oceans reveal major new revelati... | <urn:uuid:af6d8a51-521b-4ce1-9935-03977cd9d88e> | 3.21875 | 367 | Content Listing | Science & Tech. | 44.103487 |
Variable Manipulation and Output03/22/2001
This article will conclude our discussion of variables in PHP by presenting the numerous ways that atomic PHP variables can be manipulated and accessed within PHP scripts. We'll also look at the
echo command and use it to create our first PHP script that truly outputs dynamic ... | <urn:uuid:a91b7762-e325-484a-a4d5-fd4ccd8551f8> | 3.921875 | 1,053 | Truncated | Software Dev. | 53.634071 |
On March 23 MESSENGER reached the one-billion mile mark, placing the spacecraft about one-fifth of the way toward its destination to orbit Mercury. On that same day, in the early morning hours (UTC), the spacecraft's distance from the Sun was about the same as the Earth's distance to the Sun. "One billion miles and the... | <urn:uuid:7e2b5864-569b-4a52-9a95-6084c4c991ef> | 3.5 | 482 | Knowledge Article | Science & Tech. | 52.506378 |
As Grist puts it, contrary to popular belief, the U.S. is making progress on climate change. Overall, the country’s carbon emissions fell 1.7 percent last year—in part because of the explosive growth of natural gas and the Great Recession. Looking at energy-related carbon emissions in the last five years, the U.S. has ... | <urn:uuid:965d121f-1fc1-4012-878a-7e5ac290ad1e> | 3.328125 | 977 | Content Listing | Science & Tech. | 41.95883 |
Department Sustainability, Environment, Water, Population and Communities - November 2010
The Snowy River is naturally fast flowing, with its headwaters running from Mount Kosciuszko, Australia's highest peak.
However, regulation of the river has reduced flows to less than one per cent of the original volume.
The dwind... | <urn:uuid:e6030bed-1da2-4218-a0b9-d0fb0cd45efa> | 3.96875 | 608 | Knowledge Article | Science & Tech. | 41.524523 |
Brief SummaryRead full entry
North American Ecology (US and Canada)Poanes hobomok is a year-round resident across most of the eastern United States and southeastern Canada, with separate populations in Colorado and New Mexico (Scott 1986). Habitats are wooded areas. Host plants are grasses especially from two genera: P... | <urn:uuid:8689fdfd-c82b-44df-ae54-5b04635091a4> | 2.890625 | 126 | Knowledge Article | Science & Tech. | 49.544422 |
It's hard to imagine an organism much simpler than the hydra. It doesn't have brains, hearts, or eyes - it's basically just tentacles with a mouth attached. And yet these simple creatures pull of biological feats no other animal can.
Hydra are one of a few species - flatworms are another recently discussed example - th... | <urn:uuid:98467857-f679-4c7e-abb1-34894dc4f5a8> | 3.21875 | 552 | Truncated | Science & Tech. | 38.129752 |
Thank you in advance. please if possible, explain for me, so i can solve other problems by myself
So, taking the first of your questions:
"How many bit strings of length 10 have exactly three 0s?"
is equivalent to asking: in how many ways can I make a set of 3 positions out of 10? (the positions being the positions in ... | <urn:uuid:12c4d715-0279-436b-8a79-065cf83cd8a5> | 3.234375 | 113 | Q&A Forum | Science & Tech. | 73.020539 |
First, you must break up the south-of-east force into its components. You can do this using trig.
From here you add the x-componet of the south-of-east force to the eastern force to get a force in the x direction of 1.1204. Because F=ma, the acceleration in a given direction is F/m. So, the acceleration in the x and y ... | <urn:uuid:64e7e1c8-9fbe-4829-b40c-4b6fa351de4c> | 3.09375 | 253 | Q&A Forum | Science & Tech. | 90.55084 |
|A Front Row Seat to the Universe|
magine seeing stars and planets as if they were just outside your living room window. From this window seat to the universe, you could see the birth and death of stars and galaxies as they appeared billions of years ago. The Hubble Space Telescope is your window seat to the universe. ... | <urn:uuid:dab3651d-cdec-49df-ab33-86333f12f564> | 3.28125 | 480 | Knowledge Article | Science & Tech. | 49.169826 |
A large, cicular plain.
A planetary surface that has been modified little since its formation typically featuring large numbers of impact craters (compare to young).
A theory, now widely accepted, that the Sun is surrounded by a distant cloud of comet-stuff, now called the Oort Cloud, bits of which are occasionally hur... | <urn:uuid:b4b7f349-e3b9-4ee2-b05d-a773e91bdd03> | 3.53125 | 277 | Structured Data | Science & Tech. | 53.706269 |
From the F# specification.
Reference manual page.
F# Power Pack. (Source code file q.fs in the math section as of this posting.)
Basically, user-defined numeric literals allow a programmer to define a new numeric type based on suffix of a literal -- similar to built-in numeric literals. (For example, instances of the b... | <urn:uuid:a93dfcf6-ba7c-4535-b0e7-ee5cf38fe61a> | 3.3125 | 797 | Documentation | Software Dev. | 63.092822 |
not only brings national attention
to the Department of Forestry's
work in developing
sound stewardship practices,
but it also focuses attention
on the important
small animals play
in the life of
the planet's forests.
Timber companies will ultimately use
the study's findings to better manage
harvesting procedures in or... | <urn:uuid:fe6f843d-5300-4829-8674-60f2d6ef89a2> | 2.890625 | 1,754 | Knowledge Article | Science & Tech. | 56.092368 |
1 min 58 sec
How do we know when a tornado is forming? Scientist Harold Brooks explains how Doppler radars are used to track storm formation.
ACTIVITY DESCRIPTION AND TEACHING MATERIALS
Watch >> How Do We Know: Tracking Tornadoes
TEACHING NOTES / CONTEXT FOR USE
This short educational video teaches about the formation ... | <urn:uuid:c32ebf65-a331-4978-b404-927eed4b2b1e> | 3.390625 | 166 | Truncated | Science & Tech. | 37.644737 |
Looking for Cramster? Cramster is now Chegg Homework Help. Learn More
Three point charges are arranged as shown in the figure below. (Take q1 = 5.64 nC, q2 = 5.30 nC, and q3 = -2.97 nC.)
Find the direction of the electric force on the particle at the origin. (counterclockwise from the +x-axis)
Anonymous answered6 minut... | <urn:uuid:1ff9ab84-1139-43e3-8a08-b35e92b82f90> | 2.6875 | 108 | Q&A Forum | Science & Tech. | 79.730817 |
A device used to prevent stray light.
The class of subatomic particles in which protons and neutrons are included. The baryons form the atomic nucleus, along with another class of particles – the mesons. We, and everything we can see around us, are made of baryonic matter.
The Big Bang theory is the most accepted theor... | <urn:uuid:882a6db7-7648-42cc-858c-025413430564> | 3.734375 | 642 | Knowledge Article | Science & Tech. | 44.43127 |
To set a variable from the makefile, write a line starting with the variable name followed by ‘=’ or ‘:=’. Whatever follows the ‘=’ or ‘:=’ on the line becomes the value. For example,
objects = main.o foo.o bar.o utils.o
defines a variable named
objects. Whitespace around the variable
name and immediately after the ‘=’... | <urn:uuid:f67a4211-90ad-4a8a-a899-2b6461865b2b> | 3.921875 | 425 | Tutorial | Software Dev. | 41.06874 |
A Data file consists of a list of positive random integers. The numbers are separated by space. Design pseudo code to perform the following tasks:
(a) Print all the numbers with 10 numbers in a line.
(b) Calculate the total value of the even numbers in the file.
(for example: totalValue=2+12+20+36+…and so on)
(c) Print... | <urn:uuid:db625999-6969-45a6-b012-ed682f2f629a> | 3.9375 | 175 | Q&A Forum | Software Dev. | 60.191765 |
Carbon dioxide may be bad for the climate, but it's good for the roses. Perhaps it's time we rehabilitated this gaseous villain
IT'S LIKE standing at the edge of a giant patchwork quilt. Stretching into the distance are broad bands of bright yellow alternated with patches of delicate white, all beneath a vast glass roo... | <urn:uuid:3d2310ff-6bb1-4d4b-8973-7eec44593e32> | 3.171875 | 222 | Truncated | Science & Tech. | 58.606631 |
|Feb26-12, 11:20 AM||#1|
Gravitational field from earth/ center of mass
When calculating the gravitational field from the earth, why can we make the assumption that all of the mass of the earth is 'averaged' at the the geometrical center???
If we imagine the earth as a bunch of pieces, and then calculate the sum of for... | <urn:uuid:cc6415e3-f659-415e-9499-f5f4da3da79b> | 3.46875 | 490 | Comment Section | Science & Tech. | 52.904398 |
Add this to the murderous microbe highlight reel--a single strain of bacteria could have worsened the Great Dying event 250 million years ago, producing prodigious methane and choking out most other life on Earth. During the Permian-Triassic extinction event, 96 percent of everything in the oceans and 70 percent of eve... | <urn:uuid:09edf088-0459-4f84-9506-7de58f9c54a6> | 3.5 | 553 | Truncated | Science & Tech. | 36.714851 |
The Hubble Telescope is named after the American astronomer Edwin P. Hubble.
Hubble is the first general-purpose orbiting observatory . Launched on 24th April, 1990,
Aboard the Space Shuttle Discovery The HST makes observations in the visible, infrared, and ultraviolet regions of the electromagnetic spectrum (see Elect... | <urn:uuid:c6920792-e088-4d41-8c59-0ead8aa9a0c8> | 3.90625 | 968 | Knowledge Article | Science & Tech. | 35.329113 |
Survival in Extremophile conditions- Balloon Launches
Working at NASA Ames, we had the good fortune of meeting Jack Cackler, who was trying to prototype small balloon launches to the stratosphere. Located at 10 to 50 kilometers above the ground, the stratosphere has conditions that are out of this world: a temperature ... | <urn:uuid:9b8d0945-da95-4cf7-b14e-1ff2ae16cb97> | 3.1875 | 478 | Knowledge Article | Science & Tech. | 37.190645 |
Density (symbol: ρ - Greek: rho) (ISO 31: volumic mass) is a measure of mass per unit of volume. The higher an object's density, the higher its mass per volume. The average density of an object equals its total mass divided by its total volume. A denser object (such as iron) will have less volume than an equal mass of ... | <urn:uuid:69f017a8-9537-4a53-b359-ffafd6a2548d> | 4 | 402 | Knowledge Article | Science & Tech. | 42.4622 |
What is the Earth's Average Temperature?
Topic: Planetary energy balance: the temperature of the planet vs. the temperature of the earth's surface
Course type: Introductory, non-majors' college level
This activity teaches Climate Literacy Essential Principle 2: Climate is regulated by complex interactions among compone... | <urn:uuid:861c78e0-5cc7-4253-b55e-b0c044bb1cf6> | 3.390625 | 878 | Tutorial | Science & Tech. | 30.506817 |
NSIDC: April 6, 2009
Arctic sea ice younger, thinner as melt season begins
Arctic sea ice extent has begun its seasonal decline towards the September minimum. Ice extent through the winter was similar to that of recent years, but lower than the 1979-2000 average. More importantly, the melt season has begun with a subst... | <urn:uuid:f84040b1-6046-4f2d-9519-6cef3c2487c7> | 2.84375 | 1,146 | Knowledge Article | Science & Tech. | 69.740915 |
Wednesday, September 8, 2010
Photos by Jaap de Roode and Lisa Sharling.
By Carol Clark
Emory biologists are studying whether monarch butterflies can cure themselves and their offspring of disease by using medicinal plants. The National Science Foundation recently awarded Jaap de Roode a $500,000 grant to further his re... | <urn:uuid:330e6fcc-4712-4b82-98a8-1906783ed239> | 3.5625 | 722 | Personal Blog | Science & Tech. | 36.122037 |
I can't really figure out what I need to plug in. Here is the problem ...
At 0 degrees Celsius, the heat loss H (in kilocalories per square meter per hour) from a person's body can be modeled by
Where v is the wind speed (in meters per second)
a.) Find and interpret it's meaning in this situation
b.) Find the rates of ... | <urn:uuid:605ebc0a-82e0-4b42-9155-1b6676f93897> | 2.90625 | 102 | Q&A Forum | Science & Tech. | 89.814458 |
Serpentine Seamounts in the Mariana Forearc: Shallow Material Releases from Downgoing Plates
This activity was selected for the On the Cutting Edge Reviewed Teaching Collection
This activity has received positive reviews in a peer review process involving five review categories. The five categories included in the proc... | <urn:uuid:9b90787d-00ce-418c-8329-773489f0fb56> | 2.765625 | 754 | Knowledge Article | Science & Tech. | 40.3384 |
In chemistry and manufacturing, electrolysis is a method of using a direct electric current (DC) to drive an otherwise non-spontaneous chemical reaction. Electrolysis is commercially highly important as a stage in the separation of elements from naturally occurring sources such as ores using an electrolytic cell.
- 178... | <urn:uuid:2d36866e-5914-4c54-b0e3-09bbbe1aef8a> | 3.6875 | 3,740 | Knowledge Article | Science & Tech. | 34.173056 |
Examples of Convergent Series
Today I want to give two examples of convergent series that turn out to be extremely useful for comparisons.
First we have the geometric series whose terms are the sequence for some constant ratio . The sequence of partial sums is
If we can multiply this sum by to find
Then as goes to infi... | <urn:uuid:aa068680-1dfe-4517-85d0-e67267d71f93> | 2.84375 | 431 | Personal Blog | Science & Tech. | 58.274542 |
Hubbert's Peak Mathematics
by Luís de Sousa
M. King Hubbert's early work was founded on somewhat
complex differential equations. That earned him some criticism; the method
was as impenetrable as a monolith, which only those with profound mathematical
knowledge could understand.
Based on population work from the 1960s d... | <urn:uuid:a8b8c121-1db2-4b5b-bc42-7da476e1d7bb> | 3.9375 | 1,658 | Nonfiction Writing | Science & Tech. | 64.268434 |
Science Fair Project Encyclopedia
Types of triangles
Triangles can be classified according to the relative lengths of their sides:
- In an equilateral triangle all sides are of equal length. An equilateral triangle is also equiangular, i.e. all its internal angles are equal—namely, 60°.
- In an isosceles triangle two s... | <urn:uuid:8f32418c-1ae0-4bef-89b8-d0ae1306c0bf> | 4.4375 | 2,372 | Knowledge Article | Science & Tech. | 50.990021 |
An important service provided by invertebrates is waste recycling - making minerals and organic material available again to plants and other animals. In the soil earthworms and other invertebrates play crucial roles in the decomposition of organic matter. Their activities improve the drainage, aeration and composition ... | <urn:uuid:f474be67-3b56-46a4-940e-1862406aebcc> | 3.859375 | 844 | Knowledge Article | Science & Tech. | 24.522548 |
This graphic shows an exotic object in our galaxy called SGR 0418+5729 (SGR 0418 for short). As described in our press release, SGR 0418 is a magnetar, a type of neutron star that has a relatively slow spin rate and generates occasional large blasts of X-rays.
The only plausible source for the energy emitted in these o... | <urn:uuid:d4fb7368-c240-408e-8f81-f81a98fbc324> | 3.484375 | 1,127 | Personal Blog | Science & Tech. | 44.361117 |
Climate Change Reducing Ocean's Carbon Dioxide Uptake, New Analysis Shows
ScienceDaily (July 11, 2011) — How deep is the ocean's capacity to buffer against climate change?
As one of the planet's largest single carbon absorbers, the ocean takes up roughly one-third of all human carbon emissions, reducing atmospheric car... | <urn:uuid:579fe3d7-10c3-43ff-b125-a99dc6d3fd46> | 3.359375 | 491 | Truncated | Science & Tech. | 21.615527 |
dielectric (dĪˌĭlĕkˈtrĭk) [key], material that does not conduct electricity readily, i.e., an insulator (see insulation). A good dielectric should also have other properties: It must resist breakdown under high voltages; it should not itself draw appreciable power from the circuit; it must have reasonable physical stab... | <urn:uuid:859c3845-d708-4d1b-8e94-4a3020684952> | 3.921875 | 267 | Knowledge Article | Science & Tech. | 24.612019 |
The Chesapeake Bay and its tidal tributaries are home to dozens of species of algae. Along with certain bacteria, they release oxygen and, as primary producers, form the foundation of the Bay’s food web.
Soaking up sunlight and taking in nutrients from the water, algae comprise the broadest base of Chesapeake Bay’s foo... | <urn:uuid:c60232ba-00e9-4390-9cd4-383ed9d6edfc> | 4.15625 | 485 | Knowledge Article | Science & Tech. | 31.098449 |
Barbary macaques, Macaca sylvanus, are large Old World monkeys found in mountainous regions of Algeria and Morocco and on Gibraltar.
The population of Barbary macaques is declining and they are becoming a threatened species. Numbers are falling because the Barbary macaques are losing their habitat to human activity suc... | <urn:uuid:b6455220-8704-4bce-b45d-64c543dbf346> | 3.9375 | 384 | Knowledge Article | Science & Tech. | 22.333333 |
It's a theoretical concept. I haven't seen an actual MAV example that demonstrates this but I'm woefully lacking in following MAV development
so take my comment with a grain of salt.
Conceptually a fixed wing MAV will have a harder time maneuvering in confined indoors spaces because of the airspeed or wing span & surfa... | <urn:uuid:534b552f-8b0f-45e2-940f-10a987b5744a> | 2.75 | 382 | Comment Section | Science & Tech. | 57.475019 |
Applying physics to put out a fire, as opposed to chemistry, is an idea DARPA has been eyeing for a while, and it might lead to military devices that can better snuff out fires in enclosed places. Now they have demonstrated a new device in action.
In the video, two speakers are placed on either side of a fuel source. T... | <urn:uuid:b825374a-36d7-43b9-b330-694d2a00dd1a> | 3.109375 | 238 | Truncated | Science & Tech. | 54.712455 |
Site for the Platte River Program in Nebraska an area that is a critical staging area for migratory waterbirds of the Central Flyway. Includes links to color-infrared aerial photos, 1938 historic aerial photos, and Cottonwood Ranch research site.
The Raptor Information System (RIS) collection and bibliographic database... | <urn:uuid:ecd93e3b-4eba-462c-8f25-4742c35a39c2> | 2.921875 | 443 | Content Listing | Science & Tech. | 28.527968 |
Tiny soot particles given off in the smoke from fires can be lofted high into the atmosphere. These soot, or "black carbon", particles influence Earth's climate. They absorb incoming sunlight high in the atmosphere, heating the atmosphere while also cooling Earth's surface beneath because of the decrease in solar energ... | <urn:uuid:66261374-9acf-4a96-8ac4-135ada4bc63f> | 3.921875 | 189 | Knowledge Article | Science & Tech. | 39.961154 |
In 1960, the Pasadena, California-based Jet Propulsion Laboratory (JPL), a spaceflight engineering laboratory managed by California Institute of Technology on contract to NASA, commenced study of Voyager, a robotic spacecraft program for exploring Mars and Venus in the late 1960s and 1970s. NASA Headquarters formally a... | <urn:uuid:06107655-822a-4807-8dc4-dfaaa044f3a6> | 3.4375 | 405 | Truncated | Science & Tech. | 49.779989 |
Updating Magic Universe
Debris traces the solar magnetic field
What started as a bonanza for comet spotters becomes a new tool for exploring levels in the Sun’s atmosphere that have been hard to see up to now. The SOHO spacecraft (Solar and Heliospheric Observatory) has identified more than 1400 small “sungrazing” come... | <urn:uuid:ea220d77-1a19-4de4-9a75-93257874dd1b> | 2.984375 | 984 | Personal Blog | Science & Tech. | 43.629591 |
Ammonite identification is, by all accounts, a tricky beast. Donovan et al. (1980) admitted that "Students tell us in their essays that one of the desirable attributes of a zonal fossil is that it should be easily recognizable. Most ammonites are not". Ammonites as a whole are readily distinguished from other shelled c... | <urn:uuid:c61384b2-34f4-47e1-a6d2-2dfeac05741e> | 3.78125 | 893 | Academic Writing | Science & Tech. | 26.325593 |
First, we need to establish some terminology.
a chunk of text that a user enters on the command-line, and that the
shell passes to execl() or execv(). In
Python, arguments are elements of
sys.argv is the name of the program
being executed; in the context of parsing arguments, it's not very
important.) Unix shells also ... | <urn:uuid:a03d71d6-1070-4e53-a9c8-b676e99c35bb> | 3.515625 | 895 | Documentation | Software Dev. | 57.350161 |
Today's mad science involves the creation of modified cells. Cells stronger than their original material.
It's a Gothic thing, say the scientists:
Researcher Bryan Kaehr, a Sandia scientist, provided what could be the first ever scientific distinction made between a “mummy” and “zombie” cell.
“King Tut was mummified,” ... | <urn:uuid:21adf34d-3306-4e12-8370-db64be9e2131> | 3.125 | 236 | Personal Blog | Science & Tech. | 50.099485 |
A significant population of Florida’s manatees (Trichechus manatus latirostris) occurs in southwest Florida, including extensive protected areas within the Ten Thousand Islands (TTI) and Everglades National Park (ENP). In this wilderness area, manatees are frequently seen using offshore seagrass beds, estuarine bays, t... | <urn:uuid:941bd290-ae66-45ab-935a-1491f53091bf> | 3.90625 | 2,530 | Academic Writing | Science & Tech. | 38.554649 |
Using Data to Identify Hot Spots and Predict Bleaching Events
Part C: Degree Heating Weeks
Heat stress on corals will accumulate if the SST stays above the bleaching threshold for an extended period of time. So, in addition to measuring how far above the bleaching threshold the SST is, scientists also measure how long ... | <urn:uuid:3d660ebc-778b-489d-9f4a-41f47f3270cb> | 3.53125 | 551 | Tutorial | Science & Tech. | 56.85226 |
Are you an astronaut? Did you pack extra Twinkies for your trip to the International Space Station? If so, NASA might be on to you, my friend.
Kidding aside, it’s critical to keep an accurate tab on the weight of those in space. This is due to the simple fact that muscles have a lovely habit of atrophying when not in u... | <urn:uuid:2ca2591d-24a3-4a3e-9f80-f3366c4c462a> | 3.015625 | 470 | Personal Blog | Science & Tech. | 55.641381 |
June 14, 2013
Why, if Mars is so fascinating, does NASA now have a fixation on the Moon?December 12, 2006, Tuesday
Astronomers have discovered that billions of years before a mysterious antigravity overcame cosmic gravity and sent the galaxies scooting apart, it was already present in space, affecting the evolution of ... | <urn:uuid:1af44fae-6c69-4def-8060-3b9c95b3bbd3> | 2.703125 | 591 | Content Listing | Science & Tech. | 49.887844 |
A wire coil of 25 turns has a cross-sectional area of 14 cm2. The
coil is placed in a uniform field of a large magnet with B = 0.32
T. The coil is suddenly rotated 90 o from an orientation parallel
to the field to one perpendicular to the field. The time to flip
the coil is 0.61 s.
What is the magnitude of the average ... | <urn:uuid:9242e8e9-0652-4f12-9bd3-a162bb0d83af> | 3.09375 | 113 | Q&A Forum | Science & Tech. | 81.869595 |
Bunce, J.A. 2012. Responses of cotton and wheat photosynthesis and growth to cyclic variation in carbon dioxide concentration. Photosynthetica 50: 395-400.
The author - a research scientist at the Crop Systems and Global Change Laboratory of the U.S. Department of Agriculture - notes that large rapid fluctuations in CO... | <urn:uuid:cbaa7c60-54f4-4a2c-a3f7-806f584d01ed> | 2.859375 | 730 | Knowledge Article | Science & Tech. | 56.58516 |
Chemistry Sponsored by
Proteins consist of amino acids that conform to the following structure: R-CH(NH2)COOH
Amino acids contain an amino group, -NH2, and a carboxyl group, -COOH. Amino acids link to each when the carboxyl group of one molecule reacts with the amino group of another molecule, creating a peptide bond a... | <urn:uuid:21cd095c-16ef-48b4-84ff-dcb093a0f956> | 3.484375 | 110 | Knowledge Article | Science & Tech. | 33.176712 |
Contact: Evan Lerner
University of Pennsylvania
Caption: This is an illustration of a silicon atomic force microscope tip sliding over the surface of a diamond punch. While in contact, silicon atoms from the tip bond with the carbon atoms of the diamond and are left behind as the tip slides on. Penn researchers conduct... | <urn:uuid:ab66e022-f37d-45eb-be73-df1adacd4913> | 3 | 120 | Truncated | Science & Tech. | 25.231559 |
A nanoscale grapevine with hydrogen grapes could someday provide your car's preferred vintage of fuel. Rice Univ. researchers have determined that a lattice of calcium-decorated carbyne has the potential to store hydrogen at levels that easily exceed Department of Energy (DOE) goals for use as a "green" alternative fue... | <urn:uuid:1c22dfcd-ed08-4e20-8cb9-dfd81fa1556d> | 3.375 | 1,080 | Content Listing | Science & Tech. | 24.481757 |
Partial ice-out on Lower Saint Regis Lake , March 22, 2012.
Record-high March temperatures have driven the ice from Lower Saint Regis Lake earlier than usual. Only about half of it remains today (March 25), all rotten and waiting for a final push by the wind to disintegrate completely. Several climatic factors have con... | <urn:uuid:959fea4a-b8f8-4af5-8d82-401997865877> | 3.28125 | 503 | Personal Blog | Science & Tech. | 52.431151 |
Gouldian finches naturally wear different colored caps and usually choose mates with their same cap color. Covering a male’s right eye changes his courtship behavior.
Credit: Sarah R. Pryke/Macquarie Univ.
Even if science can’t make life longer, perhaps a pill can make a long life better
The gene patenting decision fro... | <urn:uuid:3466330b-0707-4594-9533-519c2bf58d0c> | 3.140625 | 157 | Content Listing | Science & Tech. | 37.087415 |
Specifies the font set.
Specifies the number of bytes in the string argument.
Specifies the number of characters in the string argument.
Returns the overall ink v.
Returns the overall logical v.
Specifies the character string.
If the overall_ink_return argument is non-NULL, it is set to the bounding box of the string's... | <urn:uuid:e893ceca-cd6a-484e-aecd-60bb8e334314> | 2.703125 | 354 | Documentation | Software Dev. | 44.305472 |
Continuous research and development of alternative energy could soon lead to a new era in human history in which two renewable sources - solar and wind - will become Earth's dominant contributor of energy, a Nobel laureate said here today at a special symposium at the American Chemical Society's 240th National Meeting.... | <urn:uuid:b7d7b968-8b89-4c60-ac3c-c80fb285e290> | 2.921875 | 190 | Content Listing | Science & Tech. | 24.146596 |
(Editor’s note: there’s been a lot to talk around here regarding the recent earthquake in Chile. Here’s another take on the science of large-scale natural events.)
by Katie Bowell, Curator of Cultural Interpretation
Although none of us will have noticed a difference, scientists at NASA have calculated that the 8.8 magn... | <urn:uuid:fccd0aad-4a38-4091-94ed-523ef4b1cd64> | 4.375 | 426 | Personal Blog | Science & Tech. | 59.742416 |
Click on the picture to get details about Gambas architecture...
A drawing is better than a long speech. And I'm fond of this kind
of diagram that make people think that program design is completly
clean and careful thought ;-).
The Development Environment
hides this machinery behind a pretty graphical interface.
A pro... | <urn:uuid:f49d1735-a238-4705-86e1-ce24b29a21b2> | 3.34375 | 683 | Documentation | Software Dev. | 39.693079 |
Assembly: Microsoft.Xna.Framework (in microsoft.xna.framework.dll)
A texel represents the smallest unit of a texture that can be read from or written to by the GPU. A texel is composed of 1 to 4 components. Specifically, a texel may be any one of the available texture formats represented in the SurfaceFormat enumeratio... | <urn:uuid:44d69438-c7d5-451c-90e3-3ae2f7d331e2> | 2.859375 | 147 | Documentation | Software Dev. | 49.285027 |
Science has shown us that a number of organisms use the stars for navigation: songbirds, harbor seals and, of course, humans. But a new study by a team of Swedish and South African researchers published today in the journal Cell Biology indicates that a rather unexpected creature can be added to this list—the lowly dun... | <urn:uuid:527a1e55-5a18-4a41-8ebd-b326f118885e> | 4 | 280 | Truncated | Science & Tech. | 55.927421 |
The CO2/Temperature correlation over the 20th Century
Posted on 18 June 2009 by John Cook
Previously, we looked at the correlation between CO2 and temperature over the past 40 years. However, as I'm always saying, you need to look at the broader view, not just a single piece of the puzzle. The 40 year period was chosen... | <urn:uuid:5760d445-753d-4e13-bb9c-075774e05e0e> | 2.921875 | 585 | Personal Blog | Science & Tech. | 42.580588 |
What drives the motion of a Spinning Top?
There are many forms and shapes of spinning tops, and they are put into motion
in an interesting variety of ways. Some are spun by snap-twisting a center
stem with your fingers and releasing, while the top remains on the ground.
Others are held by a support at the top while a c... | <urn:uuid:dbafc271-e28d-4933-847e-892f72c71d61> | 4 | 1,135 | Tutorial | Science & Tech. | 52.290986 |
Video - Microbial Bebop - Bloom
This musical composition was created from data of microbes (bacteria, algae and other microorganisms) sampled in the English Channel. Argonne National Laboratory biologist Peter Larsen created the songs as a unique way to present and comprehend large datasets.
This composition highlights... | <urn:uuid:06a359b5-46f5-465f-ab53-dce61ca33ef7> | 2.8125 | 198 | Truncated | Science & Tech. | 23.046897 |
Large Molecules Problem Set
Problem 12: Sequence of a longer polypeptide
Tutorial to help answer the question
A polypeptide 10 amino acids long is split into various smaller fragments, and the amino acid sequences of some of the fragments are determined. The identified fragments include: ala-gly-ser-gln, lys-trp-arg-pr... | <urn:uuid:fa6d9955-85af-4942-be20-3b04497e9c20> | 3.125 | 306 | Tutorial | Science & Tech. | 34.761353 |
Submitted by lorio on Fri, 2009-09-11 07:00
Using state-of-the-art electron microscopy techniques, a team led by researchers from Caltech has for the first time visualized and described the precise arrangement of chemoreceptors—the receptors that sense and respond to chemical stimuli—in bacteria. In addition, they have... | <urn:uuid:e72f5edc-f85e-41fd-8361-041f560e1235> | 3.03125 | 985 | Content Listing | Science & Tech. | 33.077069 |
Looking for Cramster? Cramster is now Chegg Homework Help. Learn More
Magnetic Fields - Help!
A rectangular current loop is loacted near a long, straight
wirethat carries a current of Iw = 15 A (see
the drawing). The curent in the loop isIL = 20
A. Determinethe magnitude of the net magnetic force that acts on
Anonymous... | <urn:uuid:02d2d34e-b94d-4d8b-9947-53af7d44ae43> | 2.859375 | 100 | Q&A Forum | Science & Tech. | 61.656057 |
Microevolution is evolution on a small scale within a single population. That means narrowing our focus to one branch of the tree of life.
If you could zoom in on one branch of the tree of life
scale the insects, for example you
would see another phylogeny relating all the different insect lineages.
If you continue to ... | <urn:uuid:0afcd476-24a6-46aa-92a2-11f2b690b599> | 3.765625 | 240 | Knowledge Article | Science & Tech. | 45.020814 |
Published on April 7th, 2011 by: admin in: C2010/X1Analysis of Elenin alignments and strong earthquakes in the years 2010 and 2011. There seems to be a coincidence between lineups and tectonic movement. I’ve collected some data to show an eventual connection between the two phenomena.
Leonid Elenin discovers Comet C/20... | <urn:uuid:0f35dd45-d879-4606-817b-5f95acbed7c1> | 2.78125 | 3,102 | Comment Section | Science & Tech. | 67.164527 |
Meteorites that fell to Earth during a meteor shower in July of 2011 have been confirmed to be from Mars.
It doesn’t sound possible, does it? Well the statement that the meteorites came from Mars is a little misleading. The rocks were probably just launched off the surface of the planet when it was impacted by an aster... | <urn:uuid:ef792a41-1673-423d-bc3a-22f95eda6ab2> | 3.234375 | 183 | Knowledge Article | Science & Tech. | 70.67497 |
|Mar25-05, 06:03 AM||#1|
Vapor Density: 1.3
For a solution It says; VAPOR DENSITY: 1.3
Is VAPOR DENSITY the same as Density of that solution? And what is the unit of 1.3?
Hope for inputs.
|Mar26-05, 02:45 AM||#2|
Vapor density of 1.3 means, in my opinion, that this solution has 1.3 times more of that molecule in the ga... | <urn:uuid:18bb10b9-af37-4a1a-8d99-fcbadf14f647> | 2.953125 | 299 | Comment Section | Science & Tech. | 79.297283 |
In many species of squid, sperm is transferred in complex spermatophores that function like harpoons. Exactly how the spermatophores are delivered is a matter of debate: Some biologists think they're contained inside the penis, but others aren't so sure. Squid are notoriously difficult to study in their deep marine hab... | <urn:uuid:02be5b2c-fcbb-4372-bbe4-5a01a8c2c620> | 2.96875 | 114 | Knowledge Article | Science & Tech. | 31.981651 |
Next: Results and discussion
The model operates on a square cell of pixels, typically of edge length equal to 500 pixels, where each pixel is assigned to a single phase, such as pore space or cement. The scale of the model is then approximately one micrometer per pixel length. It should be noted at this point, by way o... | <urn:uuid:a2e56b94-8787-4979-b8ee-e242805f2828> | 3.421875 | 1,641 | Academic Writing | Science & Tech. | 40.292297 |
Einstein protocol is a standard used for precisely measuring the distance between two objects in space. The Einstein protocol of finding the distance between two points is sending light point a to point b and then immediately sending a signal, using light, from point b to point a. The calculations done with this data u... | <urn:uuid:58e438ce-ccbd-434b-97aa-65e6dacf49b1> | 4 | 94 | Knowledge Article | Science & Tech. | 61.167526 |
Sea ice in the Arctic continues its record decline, thanks to unusually cloud-free conditions and above-average temperatures. For August 21, the National Snow and Ice Data Center estimated that fully one third of the Arctic ice cap was missing, compared to the average levels observed on that date from 1979-2000. Sea ic... | <urn:uuid:74841e3e-1208-4052-b619-c66f0a748607> | 3.375 | 721 | Personal Blog | Science & Tech. | 54.80869 |
Pluto is the ninth planet from the sun, but not so long
ago, it was the eighth planet. About every 220 years, Pluto switches places
with Neptune, becoming the 8th planet. This happened from
February 7, 1979 through February 11, 1999 when Pluto took over Neptunes
orbit. The reason this happened was that Plutos orbit was... | <urn:uuid:382c8c3b-c663-4516-82d7-b33363dad470> | 3.875 | 321 | Knowledge Article | Science & Tech. | 63.217059 |
Introduction to HTTP Handlers
An ASP.NET HTTP handler is the process (frequently referred to as the "endpoint") that runs in response to a request made to an ASP.NET Web application. The most common handler is an ASP.NET page handler that processes .aspx files. When users request an .aspx file, the request is processed... | <urn:uuid:c7d6092e-31b3-4dcb-a419-11c0428df55a> | 2.8125 | 1,345 | Documentation | Software Dev. | 56.410261 |
The Flick of a Switch
Rora is a gene that produces a transcription factor -- a type of regulatory protein that binds to DNA and can turn gene expression on or off like the flicking of a switch.
Rora, once it is turned on, activates the transcription of a gene that encodes another transcription activator known as Bmal-1... | <urn:uuid:ab3e25f2-2763-4c2a-90f5-71b1028f7d38> | 3.609375 | 423 | Knowledge Article | Science & Tech. | 46.883269 |
Strength of Yarn by Spinning
Date: Winter 2011-2012
Cotton yarn (thread) is created by spinning multiple cotton fibers. Why does this spinning make the yarn so strong?
The strength of cotton yarn is not a property of cotton per se. Rather it is a property of fibers being in parallel (side-by-side) rather than in series... | <urn:uuid:2b8a11f4-aefa-46ee-83fa-904d67de0db9> | 3.6875 | 934 | Academic Writing | Science & Tech. | 60.629521 |
Stupid Command Line Tricks
The Basics of
perl understands a bunch of command line switches. Some of them, like
-f, you will probably never use. Others, like
-d, you might use all the time. The
-M switch is somewhere in between. You might use it in the most trivial case, but it can probably do a lot more than you know i... | <urn:uuid:0e28d9cb-a3d0-470e-9ce5-754979c63bed> | 2.890625 | 847 | Documentation | Software Dev. | 64.458953 |
The propagation of a laser beam is well described by a wave model and diffraction. A laser beam is the output beam from an optical cavity and, for technically well designed lasers, the beam can be described by the Hermitian Gauss modes for the transverse electro-magnetic field with an amplitude distribution given by th... | <urn:uuid:8afa94d7-efeb-486e-9951-998938bc02a6> | 3.296875 | 609 | Academic Writing | Science & Tech. | 36.710348 |
Cassini sheds light on cosmic particle accelerators 18 February 2013 During an unusually strong blast of solar wind arriving at Saturn, the Cassini spacecraft detected particle acceleration to ultra-high energies, similar to what takes place around supernova explosions. Read more
The Cassini-Huygens mission is a NASA/E... | <urn:uuid:0601e3f6-b0af-470f-a5ff-5cffde71003d> | 2.90625 | 475 | Content Listing | Science & Tech. | 35.213967 |
By Andrew Freedman (Climate Central)
Recently I reported on a study showing links between rapid Arctic climate change and shifts in the jet stream throughout the Northern Hemisphere. The study, led by Jennifer Francis of Rutgers University, suggests that there may be an Arctic connection to some extreme weather events,... | <urn:uuid:fc5c01a6-f137-452c-a6a9-3135f40cb07d> | 3.671875 | 232 | Truncated | Science & Tech. | 38.715179 |
Imagine a New York autumn with almost no red or orange -- just brown, brown, brown. Experts say that could be the scene 50 years from now if people don’t start paying more attention to what’s going on with the shrubs, bushes and saplings in the forest.
The groundhog predicted an early spring this year -- and he isn't t... | <urn:uuid:9cf1f1f6-e7c4-48f5-8439-00df3b7fb033> | 2.875 | 156 | Content Listing | Science & Tech. | 64.355938 |
The bright ringlets seen here are populated with microscopic icy particles and are among the brightest features in the rings at high phase angles.
The twisted core of the F ring, at left, is flanked by three fainter ringlets which are, in fact, part of a separate continuous structure that spirals around the planet. Rig... | <urn:uuid:4888f327-5e21-4496-adaf-e266451aa0c0> | 3.34375 | 290 | Knowledge Article | Science & Tech. | 47.866175 |
(Redirected from Protons)
A proton is made up of two up quarks and one down quark. According to the Standard Model of particle physics, quarks are fundamental particles, meaning that they cannot be split into smaller particles.
- ↑ Serway, Beichner: Physics for Scientists and Engineers, 5th edition
- ↑ Krane: Modern Ph... | <urn:uuid:8833227d-55b9-44c2-aeb4-c3588a6128bb> | 3.375 | 82 | Knowledge Article | Science & Tech. | 34.976029 |
Migration is the seasonal movement of animals from one habitat to another. Animals migrate between their wintering and breeding habitats. Some creatures that you would recognize that migrate are: whales, fish, butterflies, turtles, and of course birds. Some animals travel incredible distances on these annual journeys. ... | <urn:uuid:1931cc5a-df8e-4ed5-ab9c-f6a0ae36a1d3> | 4.125 | 919 | Knowledge Article | Science & Tech. | 42.030925 |