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June 23, 2010
Oil Spill Affecting Marine Life, Top to Bottom
From nesting turtles to larval fish, Gulf ecosystem ravaged
by Sharon Young
A large disoriented tiger shark swims near a Florida Beach. Dolphins are photographed swimming in an oil slick. Pelicans flounder in thick oil. We see these ghastly images in the news... | <urn:uuid:a79ee1ac-03a4-42f2-9182-5baf8880a65d> | 3.375 | 834 | Nonfiction Writing | Science & Tech. | 50.229944 |
September 23, 2011
It is a concept that forms a cornerstone of our understanding of the universe and the concept of time – nothing can travel faster than the speed of light.
But now it seems that researchers working in one of the world’s largest physics laboratories, under a mountain in central Italy, have recorded par... | <urn:uuid:1c0c92ec-8eb3-43a9-8b59-ea96faba53e4> | 3.375 | 149 | Truncated | Science & Tech. | 24.547857 |
The first supersolid – a ghostly, quantum form of matter in which a solid flows, frictionless, through itself – was reportedly made in 2004. But a debate has raged ever since over whether the researchers involved had simply misinterpreted their results. Now two new studies suggest that genuine supersolids have been mad... | <urn:uuid:8aaf5ccb-c1c9-4a2a-9b2a-e2869d7744ba> | 4.03125 | 946 | Truncated | Science & Tech. | 33.553333 |
In John D. Pettigrew's lab, there is less to human experience than meets the eyes. Over the past several years, dozens of test subjects have stared through goggles and pressed keys while the neuroscientist squirted ice water into the volunteers' ear canals, fired strong magnetic pulses into their heads or told jokes th... | <urn:uuid:156b570c-4b63-4544-95a0-53df8b0557a9> | 3.1875 | 363 | Truncated | Science & Tech. | 40.357688 |
Click on image for full size
Image from the Hubble Space Telescope, reproduced with permission from AURA/STScI.
What's in a Name: || Arabic for "shoulder of the giant". Also known as the Martial Star. |
|Claim to Fame:|| First star seen as a sphere instead of a point of light by the Hubble Space Telescope on March 3, 1... | <urn:uuid:369e2355-d1b8-42f6-8252-c9a5a3c05139> | 3.125 | 280 | Knowledge Article | Science & Tech. | 61.051136 |
BACKGROUND: Inspired by the Namib Desert beetle that lives in one of the driest regions of the world, researchers at the Massachusetts Institute of Technology, in Cambridge, have developed a new material that can capture and control tiny amounts of water, just like the beetle does. Applications include its use for self... | <urn:uuid:5162eae7-2940-403a-8c58-1269d5fde610> | 4.25 | 460 | Knowledge Article | Science & Tech. | 37.533938 |
Today is a special day. You see, today marks the very first day of the rest of my life. In order to mark this special occasion, I am starting a blog. This blog post will forever be remembered (or forgotten) as the first among many.
I have decided to dive right into things, and begin with one of my favorite mathematical... | <urn:uuid:b9355f28-0de7-4057-9844-272ee6fcb076> | 3.046875 | 589 | Personal Blog | Science & Tech. | 60.799067 |
The following list indicates some of the ways that the mysqld server uses memory. Where applicable, the name of the system variable relevant to the memory use is given:
All threads share the
key buffer; its size is determined by the
Other buffers used by the server are allocated as needed.
See Section 8.11.2, “Tuning S... | <urn:uuid:ce8075cf-5a79-4416-b344-e28dcf725c4b> | 2.953125 | 943 | Documentation | Software Dev. | 48.628755 |
Programmable matter refers to matter which has the ability to change its physical properties (shape, density, moduli, conductivity, optical properties, etc.) in a programmable fashion, based upon user input or autonomous sensing. Programmable matter is thus linked to the concept of a material which inherently has the a... | <urn:uuid:67ffa64c-36b6-4779-a1a9-1b96fa24e9ae> | 3.0625 | 2,557 | Knowledge Article | Science & Tech. | 38.855076 |
The Pace of Evolution
Does evolution occur in rapid bursts or gradually? This question is difficult
to answer because we can’t replay the past with a stopwatch in hand.
However, we can try to figure out what patterns we’d expect to observe
in the fossil record if evolution did happen in bursts, or if evolution
happened... | <urn:uuid:bc846d95-56c6-42cf-a983-b2aa3f5fb4fd> | 3.53125 | 508 | Knowledge Article | Science & Tech. | 39.528724 |
Scientific names for organisms are also known as Latin names. Carl Linnaeus (pictured) started the naming scheme used in biology to today, with a few modifications. At the time, Latin was still a fairly dominant language of scholarship. So Linnaeus gave plants, and later animals, names in Latin. I think names based on ... | <urn:uuid:541e8b30-1b59-4b05-adcf-2d7d33972bfe> | 3.09375 | 620 | Personal Blog | Science & Tech. | 40.127204 |
The mill is silent now, and still. When International Paper succumbed to the slump in logging a few years ago and shut the doors on a plant that had once employed 650 in Gardiner and neighboring Reedsport, commerce in the coastal Oregon communities took a body blow.
The pain of the mill closure was compounded by catche... | <urn:uuid:d7bf56a5-b107-4def-91a5-e7fb3216518d> | 3.25 | 1,796 | Truncated | Science & Tech. | 44.980724 |
The Xconq networking strategy is based on having each connected program maintain a complete and accurate game state, and propagating user commands from one of the programs to all others. Thus all programs are equal; but in order to serialize multiple simultaneous user commands, one of the programs is a "first among equ... | <urn:uuid:89a14def-47eb-40d6-becd-8d28ee06e5ca> | 2.875 | 267 | Documentation | Software Dev. | 37.355177 |
Using ESA's Herschel space observatory, astronomers have discovered vast comet belts surrounding two nearby planetary systems known to host only Earth-to-Neptune-mass worlds. The comet reservoirs could have delivered life-giving oceans to the innermost planets.
In a previous Herschel study, scientists found that the du... | <urn:uuid:9f7a877d-9f29-47c2-bd9b-6ce84c9b7aff> | 3.875 | 484 | Personal Blog | Science & Tech. | 43.417131 |
Primary colors: primary only for us
Q: Why are red, green, and blue the primary colors?
A: What we call "primary colors" has nothing to do with the nature
of light. It depends rather on how we humans detect light.
"Color really refers to a sensation that a particular wavelength of light
[produces]," says Brian DeBroff,... | <urn:uuid:d53c762e-eb3a-46d7-abda-f8700d9a549e> | 4.0625 | 404 | Q&A Forum | Science & Tech. | 50.423409 |
Diversity of Foliar Endophytes in Wild and Cultured Metrosideros Polymorpa Inferred from Environmental PCR and ITS Sequence Data
Above me, the forest was alive. Tree fern fronds brushed against each other, honeycreepers piped melodies as they flitted between towering branches, and the trees stood anchored strongly in t... | <urn:uuid:7acb3a9e-393d-46a1-a12b-df7dee87a6d0> | 3.390625 | 3,645 | Academic Writing | Science & Tech. | 33.324037 |
the Great Comet of 1997,
became much brighter than any surrounding stars.
It was seen even over bright city lights.
Away from city lights, however, it put on quite a
Here Comet Hale-Bopp was photographed above
Val Parola Pass in the
blue ion tail, consisting of
ions from the
is pushed out by the solar wind.
dust tail i... | <urn:uuid:b06ce62b-4430-456b-8352-b43bd2558b1a> | 3.703125 | 168 | Knowledge Article | Science & Tech. | 60.858115 |
Arctic ice melt could see rise of "Grolar bear"
LONDON: Scientists have suggested that
due to the adverse effects of Arctic ice melting, the hybrid of a polar bear and
grizzly bear - dubbed the 'grolar bear', might rise in numbers.
According to a report in
, the effects of climate change means that the hybrid bears cou... | <urn:uuid:eeca1e64-0d1e-4e9a-b5e9-6ab9f25bf541> | 3.25 | 202 | Truncated | Science & Tech. | 41.411294 |
A translation or slide involves moving a figure in a specific direction for a specific distance. Vectors are often used to denote translation, because the vector communicates both a distance (its length) and a direction (the way it is pointing).
The vector shows both the length and direction of the translation.
A glide... | <urn:uuid:7cc3c020-316e-40a5-b6db-3fb7e26885ae> | 3.75 | 180 | Tutorial | Science & Tech. | 40.214827 |
Joined: 16 Mar 2004
|Posted: Fri May 15, 2009 2:29 pm Post subject: Researchers Develop Novel Renewable Energy Materials
|University of Queensland researchers have made a ground-breaking discovery that produces highly efficient miniature crystals which could revolutionise the way we harvest and use solar energy.
Profes... | <urn:uuid:9c83b2dc-d8e6-4400-947f-fc05114d89de> | 3.265625 | 672 | Comment Section | Science & Tech. | 24.722064 |
Mars Rover Cammand and Control
Name: David E.
Date: February 2004
How does NASA send an instruction to one of the Mars Rover crafts? How does this
command travel to the Rover and how long before the instruction is received?
Very thought provoking question.
Using the speed of light as the speed of the radio transmission... | <urn:uuid:2566ac4f-5b79-42fc-84ff-a7b5171c40a4> | 3.484375 | 427 | Q&A Forum | Science & Tech. | 77.00576 |
by Stefan Rahmstorf, Michael Mann, Rasmus Benestad, Gavin Schmidt, and William Connolley
On Monday August 29, Hurricane Katrina ravaged New Orleans, Louisiana and Missisippi, leaving a trail of destruction in her wake. It will be some time until the full toll of this hurricane can be assessed, but the devastating human... | <urn:uuid:5b19dee7-09c1-492a-95bf-7422217a4f1c> | 3.328125 | 2,428 | Academic Writing | Science & Tech. | 40.46227 |
Nov. 9, 2010 Carotenoid pigments are the source of many of the animal kingdom's most vivid colours; flamingos' pink feathers come from eating carotenoid-containing shrimps and algae, and carotenoid colours can be seen among garden birds in blackbirds' orange beaks and blue tits' yellow breast feathers.
These pigments p... | <urn:uuid:8af6f8c8-0283-41f7-b090-2466dbe334aa> | 3.734375 | 686 | Knowledge Article | Science & Tech. | 40.353045 |
Oct. 11, 2012 Returning briefly to the surface for great lungfuls of air, the underwater lifestyles of whales had been a complete mystery until a small group of pioneers from various global institutions – including Malene Simon, Mark Johnson and Peter Madsen – began attaching data-logging tags to these enigmatic creatu... | <urn:uuid:56a5d74b-43b1-4728-90bb-de02d272671d> | 3.796875 | 812 | Truncated | Science & Tech. | 42.026824 |
Web edition: November 28, 2012
To catch a skittish lunch, blue whales roll their massive bulk over and do a belly-up lunge if that’s what it takes.
Video cameras and high-tech tags stuck to whales’ backs revealed the underwater acrobatics that let the world’s largest living predators survive on some of the tiniest prey... | <urn:uuid:32e920db-d7c8-48f1-a8dc-fcc5845b3474> | 3.25 | 361 | Truncated | Science & Tech. | 68.975193 |
Oracle Certification - SQL Fundamentals I - Ampersand Substitution
Single Ampersand Substitution
When Oracle finds a variable starting with an ampersand (&) character it attempts to resolve it by first checking to see if the variable has been defined using the DEFINE command, otherwise the user is prompted for the valu... | <urn:uuid:a9c82d6e-3afe-47a2-8d75-4441fda34658> | 3.3125 | 307 | Documentation | Software Dev. | 30.466895 |
Learn something new every day More Info... by email
A wheel spider is an amazingly unique creature found in the Namib Desert in southern Africa. Also called a golden wheel spider or a dancing white lady spider, the wheel spider evades predators by burrowing into the sand or by rolling itself into a ball and cartwheelin... | <urn:uuid:8cb82b33-38e3-4840-928c-db6205c4bc7b> | 3 | 531 | Knowledge Article | Science & Tech. | 57.049392 |
Learning OOP in PHP ASAP!
PHP is so much more than a scripting language. It’s a full-fledged language capable of building very complex applications. By harnessing the full power of Object Oriented Programming, you can reduce the amount of time you spend coding and use it to build better websites. This tutorial will sho... | <urn:uuid:64498b2e-bba0-440f-909b-53e110484586> | 3.0625 | 140 | Truncated | Software Dev. | 55.993081 |
Many of you have probably heard about asteroid 2005 YU55, the massive rocky body that tomorrow night will
collide with Earth in a ball of flames pass the planet safely, albeit closer than any asteroid in the last 35 years.
And while astronomers are certain we'll be spared this time, the brush with such a massive rock r... | <urn:uuid:65162c43-0d15-4c54-9566-16d814ee7f10> | 3.828125 | 2,145 | Listicle | Science & Tech. | 54.048114 |
Photo by Barbara Albrecht
azteca is a 1/8- to 1/4-inch-long crustacean commonly
found in lakes, ponds, and streams throughout North America. They are
an important link in the aquatic food chain and a food source for several
predators, including fish and various invertebrates.
Pesticides such as pyrethroids from residen... | <urn:uuid:f4b8ef86-c4fe-49c2-85ff-9f865fcef847> | 3.4375 | 119 | Knowledge Article | Science & Tech. | 34.576769 |
A controversial idea to brake global warming, first floated by the father of the hydrogen bomb, is affordable and technically feasible, but its environmental impact remains unknown, a trio of US scientists say.
Sowing the stratosphere with particles to reflect the Sun and cool the planet is possible with current techno... | <urn:uuid:98375d80-65dc-47f8-9cc7-160631860948> | 3.140625 | 264 | Truncated | Science & Tech. | 32.624049 |
8th July 2009 - 01:13 PM
I am currently working on a uni project which involves getting material properties of different materials (steel, rubber, foam, etc.).
Now I have always thought that getting Young's modulus was simply from doing a tensile test, getting the stress-strain graph from stress = P/A and strain = delt... | <urn:uuid:11fb8676-2cfe-4b09-bf88-cc89258d2e1e> | 2.765625 | 718 | Comment Section | Science & Tech. | 80.825919 |
Ivars Peterson's MathTrek
Suppose there is a finite number of primes, Euclid argued. This means there's also a largest prime, n. Multiply all the primes together, then add 1: (2 x 3 x . . . x n) + 1. The new number is certainly bigger than the largest prime.
If the initial assumption is correct, the new number can't be... | <urn:uuid:f4a08676-27e2-4369-9e03-f55b0e723683> | 3.390625 | 1,069 | Knowledge Article | Science & Tech. | 67.35517 |
[Python-3000] [ANN] Python 3 Symbol Glossary
tjreedy at udel.edu
Sun Nov 2 02:52:43 CET 2008
Over the years, people have complained about the difficulty of finding
the meaning of symbols used in Python syntax. So ... I wrote a
Python 3 Symbol Glossary
There are .txt and .odt versions. The first is usable, the second is... | <urn:uuid:a1f3b9f8-e805-4b52-ba4d-aa8a0e947345> | 2.75 | 506 | Comment Section | Software Dev. | 51.710172 |
The exception that is thrown when a non-fatal application error occurs.
For a list of all members of this type, see ApplicationException Members.
[Visual Basic] <Serializable> Public Class ApplicationException Inherits Exception [C#] [Serializable] public class ApplicationException : Exception [C++] [Serializable] publ... | <urn:uuid:e9cd6963-c595-4682-b46b-13950d6d6583> | 2.828125 | 344 | Documentation | Software Dev. | 20.512903 |
September 17, 2012
The accidental introduction of the brown tree snake on Guam has resulted in a loss of birds and a subsequent explosion of spiders. Photo by: Isaac Chellman.
"You can't walk through the jungles on Guam without a stick in your hand to knock down the spiderwebs," says lead author Haldre Rogers, a Huxley... | <urn:uuid:db04f1e5-4e9b-4a03-a72d-591bfcf43732> | 3.234375 | 1,875 | Content Listing | Science & Tech. | 52.529234 |
What is the smallest number with exactly 14 divisors?
Many numbers can be expressed as the sum of two or more consecutive integers. For example, 15=7+8 and 10=1+2+3+4. Can you say which numbers can be expressed in this way?
If it takes four men one day to build a wall, how long does it take
60,000 men to build a simila... | <urn:uuid:8597d65c-153b-4eb4-a810-ca9e004a7923> | 2.875 | 496 | Knowledge Article | Science & Tech. | 92.568618 |
Image by Getty Images via @daylifeI'm sure like many of you, I have been watching the news coverage of the crisis in Japan. Perhaps because I am a math teacher, I have been more aware of the amount of numbers in the reports. From earthquake scales to radiation values, we seem to need numerical values to understand or q... | <urn:uuid:e8f086d1-8a4b-4d44-bc7a-16006bbb8d07> | 3.734375 | 262 | Personal Blog | Science & Tech. | 62.009457 |
In the blizzard of climate prevarication we've had to endure this winter, because, you know, it still gets cold in January, some important points get lost. It's not just about temperature! That stuff we spew into the atmosphere does damage in many ways.
When we humans burn fossil fuels, we pump carbon dioxide into the ... | <urn:uuid:1880afaa-7347-4726-baa6-3a115ede2fda> | 3.6875 | 532 | Personal Blog | Science & Tech. | 54.229224 |
0.5" (13mm). Overall reddish-brown with spines on thorax; often seen
carrying leaves and other plant material.
NATURAL HISTORY: Feed on fungus that they raise underground. Workers snip
off leaves and other plant parts and carry them back to the nest, sometimes
in long lines. The leaves and plant parts are "chewed" and ... | <urn:uuid:65a35131-9d72-4e51-82b2-330b7a308568> | 2.90625 | 179 | Knowledge Article | Science & Tech. | 67.979494 |
Swing a ringing phone inside a long sturdy sock and you will hear the strangely familiar Doppler effect.
Sprinkle some iron filings on an old swipe card and pretty magnetic patterns appear right before your eyes.
Can you unmix a mixed-up liquid?
Master this impossible looking trick and you'll feel like a ninja Jedi mas... | <urn:uuid:99e28d82-816e-4223-af00-8da50a76fd5c> | 2.828125 | 662 | Content Listing | Science & Tech. | 60.513689 |
Humans have altered almost every thing about the Mekong River ecosystem. They have altered the water quality from fertilizer, pesticide, and urban waste pollution. They have affected the biodiversity by over fishing and fishing by explosives. In addition, humans have affected biodiversity because they have destroyed ha... | <urn:uuid:df3817ec-5f01-4046-afc0-c1d25251a1a7> | 3.390625 | 1,320 | Comment Section | Science & Tech. | 47.324892 |
Titan's Lapping Oil Waves
When the European Huygens probe on the Cassini space mission parachutes down through the opaque smoggy atmosphere of Saturn's moon Titan early next year, it may find itself splashing into a sea of liquid hydrocarbons.
In what is probably the first piece of "extraterrestrial oceanography" ever ... | <urn:uuid:f12350f1-b2ed-4c24-ae76-6deb55cea313> | 3.75 | 1,177 | Knowledge Article | Science & Tech. | 39.342221 |
A chord is a line segment whose endpoints are on a circle. A diameter is a chord that passes through the center of a circle. Another one of the parts of a circle is a radius, which is a line segment with one endpoint at the center and one endpoint on the circle. Congruent circles have congruent radii (the plural of rad... | <urn:uuid:438164ca-98ec-4e5a-81d6-459bbc4e67df> | 4.3125 | 340 | Tutorial | Science & Tech. | 58.383067 |
Physics: Understanding Newton's First Law of Motion
Drum roll, please. Newton's laws explain what happens with forces and motion, and his first law states: "An object continues in a state of rest, or in a state of motion at a constant speed along a straight line, unless compelled to change that state by a net force." W... | <urn:uuid:6e80c619-d7df-4407-9e1b-5473e14a6db6> | 4.25 | 884 | Tutorial | Science & Tech. | 64.787623 |
2012 - 2014
Center for Climate System Modeling
Global climate change represents one of the grand challenges facing humanity. Although there are major efforts underway to develop and implement international agreements to limit further growth of the underlying drivers, i.e., primarily the emission of greenhouse gases, su... | <urn:uuid:2b30f550-c7e2-492f-8543-d6460e17c6e1> | 3.046875 | 597 | Knowledge Article | Science & Tech. | 25.550975 |
Get flash to fully experience Pearltrees
Regular expressions can be scary…really scary. Fortunately, once you memorize what each symbol represents, the fear quickly subsides. If you fit the title of this article, there’s much to learn! Let’s get started. Section 1: Learning the Basics
Mark-Jason Dominus Copyright © 199... | <urn:uuid:dd37e59a-37ee-41e4-9fee-8f4f809624ee> | 2.984375 | 256 | Truncated | Software Dev. | 51.788931 |
Web edition: November 16, 2012
Print edition: December 1, 2012; Vol.182 #11 (p. 4)
NEW DATING METHOD FOR MILLION-YEAR-OLD FOSSILS — A new radioactive dating method promises to close one of the major remaining gaps in methods of fixing dates on the geological and archaeological time scales. The new procedure, based on r... | <urn:uuid:cbb986bb-c52f-4960-a083-6e41d3634d1c> | 3.609375 | 193 | Knowledge Article | Science & Tech. | 48.091294 |
Editor's note: This story will appear in our January issue but is being posted early because of a publication in today's Nature.
Thousands of years after the last woolly mammoth lumbered across the tundra, scientists have sequenced a whopping 50 percent of the beast’s nuclear genome, they report in a new study. Earlier... | <urn:uuid:de9c378b-a9b8-4e76-9763-ab98727a79be> | 4.09375 | 665 | Truncated | Science & Tech. | 42.312813 |
Captive Breeding and Conservation
When effective alternatives are unavailable or unsuccessful, captive-breeding can play a crucial role in the recovery of critically endangered species. The popularity of incorporating captive-breeding programs in species recovery plans has increased over the years. With constantly impr... | <urn:uuid:61ec1c2e-ebf5-43ac-8095-737c49808e69> | 3.828125 | 374 | Knowledge Article | Science & Tech. | 21.853 |
Clear and Bright
With a Chance of Sunspots and Magnetic Storms
Because of our increasing reliance on satellite-driven technology and far-flung power grids, the Sun and its magnetism can wreak havoc on society in a matter of hours. New computer models and observing tools developed at NCAR are sharpening scientists’ view... | <urn:uuid:36dd219e-65b9-4ed4-9e55-c3cfb2958275> | 3.96875 | 2,947 | Knowledge Article | Science & Tech. | 40.611135 |
Elysia is an “opisthobranch” sea slug famous on the internet for its remarkable ability to photosynthesise, giving it the nickname of “solar-powered sea slug”. It does this by kleptoplasty – stealing plastids from its algal food. If you note the greenish colour in E. asbecki above (Wägele et al., 2010), the green comes... | <urn:uuid:ace4e8ad-ff2a-4f8e-ba69-7386f927ed12> | 3.203125 | 2,973 | Personal Blog | Science & Tech. | 48.924907 |
Scientists have taken to egg swapping in the hopes of reinvigorating the ailing population of streaked horned larks in Washington state.
The streaked horned lark is a small bird native to both western Washington and Oregon currently on the candidate list of endangered specied according to the U.S. Fish and Wildlife Ser... | <urn:uuid:a9324028-87c6-40f4-84f8-33938778e70e> | 3.21875 | 194 | Personal Blog | Science & Tech. | 47.892361 |
What’s the News: While the Kepler spacecraft is busy finding solar system-loads of new planets, other astronomers are expanding our idea where planets could potentially be found. One astronomer wants to look for habitable planets around white dwarfs, arguing that any water-bearing exoplanets orbiting these tiny, dim st... | <urn:uuid:da245efa-412f-42d5-8666-50fa88f7bbfa> | 3.671875 | 2,880 | Content Listing | Science & Tech. | 44.360883 |
Many mathematical surveys indicate that the "Proof of the Riemann Hypothesis" is the most important open question in mathematics. The rapid pace of mathematics, along with computer-assisted mathematical proofs and visualizations, leads me to believe that this question will be resolved in my lifetime. Math aficionado Jo... | <urn:uuid:3292f0ca-6493-4563-83da-6e3f9d25201a> | 2.859375 | 826 | Knowledge Article | Science & Tech. | 39.37682 |
HPF adds directives to Fortran to allow the user to advise the compiler on the allocation of data objects to processor memories. The model is that there is a two-level mapping of data objects to memory regions, referred to as ``abstract processors.'' Data objects (typically array elements) are first aligned relative to... | <urn:uuid:ea875d22-5935-4825-8487-fcea5c27cb1c> | 3.328125 | 1,341 | Documentation | Software Dev. | 23.990842 |
I occasionally come across a new piece of notation so good that it makes life easier by giving a better way to look at something. Some examples:
Iverson introduced the notation [X] to mean 1 if X is true and 0 otherwise; so for example Σ1≤n<x [n prime] is the number of primes less than x, and the unmemorable and confus... | <urn:uuid:2bd619dc-d0a3-442a-8cd8-2e1bd7a036ea> | 3.109375 | 303 | Q&A Forum | Science & Tech. | 60.381029 |
I agree with Michael that the question is probably expecting you to estimate the answers from the graph. However, this is what I would do if these were experimental results I was analysing.
Let's assume that the blue line is a straight line $f(x)$ and the curve is a quadratic $g(x)$. A straight line has the form $y = a... | <urn:uuid:88486348-20ab-404c-9f99-7ca91aec9dbc> | 3.125 | 626 | Q&A Forum | Science & Tech. | 107.225003 |
The important factor is not the absolute speed of the atoms but the speed relative to each other. I would guess the article on the rubidium atoms is related to making a Bose-Einstein condensate, and slow relative speed is needed otherwise your cloud of atoms just disperses instead of making a condensate.
Increasing the... | <urn:uuid:0fc1880d-c508-4739-af88-47a9244a0cdb> | 3.484375 | 317 | Q&A Forum | Science & Tech. | 43.300519 |
26 posts tagged NASA
When ships cross bodies of water, they leave behind visible “tracks” of pollution. NASA has been using satellite imagery to collect data on ship tracks, and the results are mildly disturbing.
The image above shows only nitrogen dioxide (NO2) emissions, and is a composite of data collected by the Oz... | <urn:uuid:bc28b9e7-b81d-4497-bd81-a1fd986706ef> | 2.84375 | 2,055 | Content Listing | Science & Tech. | 37.506162 |
II.A.1 Part Two-Compiling and Graphing the Data
During this portion of the activity, you and your class will compile all the ant lion
data and plot the results on a graph.
Each student will need:
- Ant Lion Class Data Worksheet
- One piece of graph paper
|Instructions for the teacher:
- Copy the Class Data Worksheet on... | <urn:uuid:2b322655-426e-418f-a8c7-b1392e5d4457> | 4.09375 | 936 | Tutorial | Science & Tech. | 70.189087 |
July 2012: To pronounce all the objects and terms in our hobby, we need to be multilingual.
May 29, 2012
|A middle school science class is learning about the solar system. “The seventh planet from the Sun,” the teacher states, “is Yur-AIN-is.” Jimmy, the class clown, seizes the opportunity and asks, “Have you ever seen... | <urn:uuid:0efe669a-2ce8-4b7d-a243-820120ad129f> | 2.75 | 474 | Truncated | Science & Tech. | 53.964381 |
|Origin and Evolution of Flight||Theory (Origin and Evolution Continued)||Relationship Between Insect Flight and Thermoregulation||Body Size, Metabolism, Wing Length, Body Temperature||Co-Adaptation||Thermoregulation in various Insects||Sources||HOME|
|Co-Adaptation and Survival|
|Access to nutritional resources, appro... | <urn:uuid:38904048-8eda-4347-8ed2-9b220757f39c> | 4.28125 | 386 | Academic Writing | Science & Tech. | 21.262857 |
Current Biology, Volume 15, Issue 6, 29 March 2005, Pages 549-554
Cynthia E. Kicklighter, Shkelzen Shabani, Paul M. Johnson and Charles D. Derby
Numerous studies have demonstrated that chemical defenses protect prey from predation [1,2,3,4,5,6,7] and have often assumed that these defenses function by repelling predator... | <urn:uuid:1133df47-bbc9-46a0-94ab-61fcfa4907dd> | 2.703125 | 712 | Academic Writing | Science & Tech. | 29.546556 |
Contact: Jason Bardi
American Institute of Physics
Caption: Pressure contours show the effect of a front-facing blast at various times after detonating 1.5 kg of C4 explosives from a distance of three meters. Black represents 1.0 atmosphere of pressure, and red indicates pressures over 3.5 atmospheres.
Credit: NRL's La... | <urn:uuid:0476f402-b24e-4e08-9b44-31869036a594> | 2.765625 | 99 | Truncated | Science & Tech. | 37.881753 |
ANSI Common Lisp 21 Streams 21.2 Dictionary of Streams
&optional input-stream eof-error-p eof-value recursive-p
- Arguments and Values:
input-stream - an input stream designator.
The default is standard input.
eof-error-p - a generalized boolean.
The default is true.
eof-value - an object.
The default is nil.
recursive... | <urn:uuid:057a4f4e-0004-40d9-b2a5-7c151be8f618> | 3.34375 | 435 | Documentation | Software Dev. | 57.628188 |
They're all estimations, there's obviously no way to know exactly how many stars there are in the entire Universe as its dimension still remains unknown.http://www.huffingto...e_n_790563.html
When scientists previously estimated the total number of stars, they assumed that all galaxies had the same ratio of dwarf stars... | <urn:uuid:dcb05742-1145-4e25-811b-4c17be85b8c4> | 3.5625 | 419 | Comment Section | Science & Tech. | 49.006217 |
MODERN agriculture is set to become as bad for the planet's health as global warming, a team of leading environmental scientists has warned. They list rainforest destruction, nitrogen pollution and the spread of diseases such as foot and mouth and BSE among the growing threats from agriculture.
"The environmental effec... | <urn:uuid:3a7726a2-5fd2-4127-98d2-d47216fe8e3c> | 2.953125 | 206 | Truncated | Science & Tech. | 33.618947 |
Discovery of New Mineral, Krotite, in a CAI
The first natural occurrence of a low-pressure CaAl2
mineral has been found in a refractory inclusion
in a carbonaceous chondrite
meteorite, as reported in the May/June 2011 issue of American Mineralogist
. The discovery was led by Harold C. Connolly, Jr. of Kingsborough Comm... | <urn:uuid:8b8bb034-ef8c-4da9-bde7-c2bfcea5eba5> | 2.90625 | 912 | Knowledge Article | Science & Tech. | 49.878389 |
Now, let's consider what happens when we are given one of the two outcomes
of each event (a,b) from
consistently, and we want to deduce the other. To be specific, let the
be generated N times, and let the value of B be seen each
time. What is the asymptotic average log number of ways to see A
given that B is seen each ... | <urn:uuid:45ec52a1-0d43-4875-a99a-ea709e96d206> | 3.765625 | 728 | Academic Writing | Science & Tech. | 51.238479 |
In fact, of course, the photon number does not increase without limit as atoms keep crossing the resonator. Because the walls are not perfect reflectors, the more photons there are, the greater becomes the chance that one of them will be absorbed. Eventually this loss catches up to the gain caused by atomic injection.
... | <urn:uuid:cef78f4a-6379-4f3c-a648-4b9c98b049f5> | 3.9375 | 790 | Academic Writing | Science & Tech. | 34.959013 |
Observing the Sun
- Our nearest Star
Sitting a modest 93
million miles from us, and with light taking only minutes to reach
us, our Sun gives us a great opportunity to see how a star really
behaves. To most people looking out on a warm summer's day the
sun seems a stable and calm globe. When we start to look in a
littl... | <urn:uuid:84b6a656-4fef-479e-8dfc-9dd675d1c68e> | 2.75 | 636 | Personal Blog | Science & Tech. | 57.855401 |
All the astronomy sites are buzzing over this amazing image of a sunspot:
|Click to embiggen.|
I don’t blame them… it’s gorgeous! And it’s not even real! It’s a computer-generated model of the magnetic field in a sunspot; near the center the field lines are mostly vertical and around the edges they are mostly horizonta... | <urn:uuid:9db9d2a8-e00f-4659-9ed4-2dd6f0717741> | 3.6875 | 780 | Personal Blog | Science & Tech. | 56.552022 |
July 3, 2012
Last week, paleontologists at the Argentine Museum of Natural Science in Buenos Aires literally unveiled a new dinosaur. Named Bicentenaria argentina to celebrate the museum’s 200th anniversary and just over two centuries of Argentine independence, the dinosaur was presented in a dramatic mount in which tw... | <urn:uuid:34a5a9eb-0916-4c91-b0e4-351a79b57c42> | 3.703125 | 3,623 | Content Listing | Science & Tech. | 38.51349 |
EWWNP means Exploring Wild and Wonderful Number Patterns Created by Yourself! Investigate what happens if we create number patterns using some simple rules.
What happens when you add the digits of a number then multiply the
result by 2 and you keep doing this? You could try for different
numbers and different rules.
In... | <urn:uuid:dff68dab-2343-41db-a456-94bbc36aeba8> | 3.6875 | 203 | Content Listing | Science & Tech. | 71.752667 |
E L N I Ñ O / L A N I Ñ A
The term El Niño (Spanish for "the little boy" or "the Christ Child") was originally used by fishermen along the coasts of Ecuador and Peru to refer to above-normal sea-surface temperatures that typically appear around Christmas time in the eastern Pacific Ocean and last for several months. Bu... | <urn:uuid:74da975d-7efa-4c07-8ec1-f69e849a5217> | 4.15625 | 773 | Knowledge Article | Science & Tech. | 51.239009 |
Sections 27.1 - 27.3
We're now starting to talk about quantum mechanics, the physics of the very small.
At the end of the 19th century one of the most intriguing puzzles in physics involved the spectrum of radiation emitted by a hot object. Specifically, the emitter was assumed to be a blackbody, a perfect radiator. Th... | <urn:uuid:afb64acc-adeb-4fa9-adb5-7765660dd862> | 4.40625 | 879 | Academic Writing | Science & Tech. | 45.434631 |
y hold integer values, you just choose to use
0b binary literals to define them.
If you want to combine the two into
z, you can easily do so using a shifting operation and binary bitwise operations:
>>> x = 0b00010101010
>>> y = 0b1110000
>>> z = (x << 7) | y
Do note that python does not track how many bits 'precision'... | <urn:uuid:12238b65-e880-4323-bb6c-fc9a0e848904> | 2.875 | 380 | Q&A Forum | Software Dev. | 71.584063 |
Posted on Mar 3, 2010 in Astronomy | 1 comment
How does the Milky Way look in the night sky to our inaided eye?
To the unaided eye, on a clean night the Milky Way appears as a band of light that covers nearly the entire sky. With magnification, the sight is quite different. See Milky Way-Wikipedia for some nice photos.... | <urn:uuid:c712e281-d378-40af-b7c2-55be40a56b11> | 3.0625 | 189 | Q&A Forum | Science & Tech. | 86.716361 |
From Uncyclopedia, the content-free encyclopedia
“I hope people remain interested in MY old bones”
Vertebrate palaeontologists are people unnaturally obsessed with old bones. They should not be confused with geologists or archaeologists, and are distinguished by complete lack of knowledge of anything outside their very... | <urn:uuid:7beacb22-88f2-49d1-a5a6-925469933322> | 2.734375 | 747 | Knowledge Article | Science & Tech. | 33.741446 |
United We Orbit
It's a story of spacecraft meets spacecraft.
- By James E. Oberg
- Air & Space magazine, January 1997
(Page 4 of 5)
Before mission STS-71, the astronauts “flew” over 200 approaches in a variety of simulators. Docking with Mir requires a very slow closing speed—barely more than an inch per second during ... | <urn:uuid:118536e6-738b-4c09-a7d2-1fa3474d46c7> | 2.78125 | 935 | Truncated | Science & Tech. | 54.384356 |
HTML Cheat Sheet
HTML Help Forum
Link to us
How to make a basic frame
They key to creating frames, is understanding how they work. Once you have that down, its pretty simple.
A basic framed page is made up of 3 separate web pages:
When you put them all together, you get a framed page, like this:
Lets get started:
Your ... | <urn:uuid:6c36d1c4-96c9-4c4e-86a2-d6dfe5ff8a07> | 3.515625 | 492 | Tutorial | Software Dev. | 82.386398 |
Using Math to Predict Future Extinctions
"Our study provides a theoretical basis for management efforts that would aim to mitigate extinction cascades in food web networks. There is evidence that a significant fraction of all extinctions are caused not by a primary perturbation but instead by the propagation of a casca... | <urn:uuid:1848522a-fab6-45f0-8102-06fd2cfbcbb3> | 3.609375 | 695 | Knowledge Article | Science & Tech. | 25.731176 |
SAVING WOLVES IN THE GREAT LAKES REGION
Once one of the most widely distributed land mammals in North America, the gray wolf has also been one of the most persecuted. State, local and private bounties and a federal extermination program have nearly eliminated the gray wolf from the lower 48. By the 1970s, Great Lakes w... | <urn:uuid:a44b0c91-e080-46c2-943d-116136786658> | 3.359375 | 476 | Knowledge Article | Science & Tech. | 24.852898 |
a class with a default constructor (one that takes no arguments) that prints a
message. Create an object of this class.
an overloaded constructor to Exercise 1 that takes a
argument and prints it along with your message.
an array of object handles of the class you created in Exercise 2, but
don’t actually create object... | <urn:uuid:276ec70e-f8d1-41df-9a52-d3712a191423> | 3.140625 | 161 | Tutorial | Software Dev. | 53.745935 |
The Viability of Frozen Human Embryos: Lessons From Animal Research
In the long debate over the ethical permissibility of destroying embryonic human beings in research, it has sometimes been suggested that frozen embryos are somehow less human, or less alive, than are unfrozen embryos. For instance, in January 2000, Se... | <urn:uuid:5d028ede-1d3f-4acd-a0d8-1a5958bdf1d5> | 2.90625 | 2,560 | Academic Writing | Science & Tech. | 44.396728 |
Here’s something you don’t see every day: a tornado on the surface of the sun. NASA’s Solar Dynamics Observatory posted this stunning video, which shows the sun’s plasma sliding and spinning around in the star’s magnetic fields for 30 hours earlier this month.
Terry Kucera, a solar physicist with NASA’s Goddard Space F... | <urn:uuid:a3ae770a-8a74-4e44-a00e-889a220f1ab7> | 3.453125 | 212 | Truncated | Science & Tech. | 57.211535 |
Joined: 16 Mar 2004
|Posted: Wed Jan 31, 2007 12:04 pm Post subject: Quantum Dots Aid Cancer Imaging Studies
|Quantum Dots Aid Cancer Imaging Studies
One of the more difficult diagnostic tasks an oncologist faces is determining if cancer has spread to the lymphatic system, particularly when it is necessary to assess ly... | <urn:uuid:3c2a3fa7-2c71-4771-90a8-30e54ad89d83> | 2.6875 | 467 | Comment Section | Science & Tech. | 39.58455 |
Its a simple one this week, we are looking at sinking and floating. My children love playing with water so had a great time testing things today.
What you need:
- a large bowl of water
- Objects to test (anything you like, but good to pick some solid and some hollow)
- Fill the bowl or container about 2/3 full of water... | <urn:uuid:c1313c73-b26d-4ec0-a6b1-da60f9cd2473> | 3.6875 | 216 | Personal Blog | Science & Tech. | 66.837421 |
More In This Article
Editor's Note: This article originally appeared in the October 2005 issue of Scientific American.
In May 1972 a worker at a nuclear fuel–processing plant in France noticed something suspicious. He had been conducting a routine analysis of uranium derived from a seemingly ordinary source of ore. As ... | <urn:uuid:8a5f5a22-b4a3-469a-bb36-6607339f1d7c> | 3.9375 | 755 | Truncated | Science & Tech. | 34.492419 |
The Earth Trials
Can we test our geoengineering schemes before we have to use them?
In their Science article, Alan Robock of Rutgers and colleagues underscore that point. The group has used a NASA computer model to simulate the spraying of a sulfur dose roughly one-seventh as large as Pinatubo, released annually over t... | <urn:uuid:1e51f25c-fbb1-48e5-8a10-990c02e5b3c6> | 3.5625 | 662 | Truncated | Science & Tech. | 41.045412 |
ID selectors are a lot like class selectors. They work in a very similar way, and have a similar syntax. The essential difference is that while class selectors apply to one or more elements on a page, ID selectors apply to exactly one element.
For example, while you can have many lists of ingredients, you might have on... | <urn:uuid:f2829c41-dc87-4733-931f-e81d658f03ff> | 3.046875 | 688 | Tutorial | Software Dev. | 51.687517 |
Cascading Style Sheets (CSS)
- Use style sheets to control layout and presentation
- All pages using CSS must be usable when CSS is disabled or not supported. for example, when an HTML document is rendered without style sheets, it must still be possible to read the document
- Allow users to override the formatting, if ... | <urn:uuid:26691a2e-c714-414f-856e-bbe0abbcdd68> | 3.765625 | 309 | Knowledge Article | Software Dev. | 39.230238 |
¡Viva la Science!
When tiny arms became crooked legs
Big Bird is a terrible example to us all, at least when it comes to bird anatomy. Check out those gams and you’ll see why. Like humans, real birds are bipedal, but their legs aren’t straight up and down. Instead, bird legs zigzag in such a way that birds are essentia... | <urn:uuid:57257f9f-57af-489f-a7e8-60b99fc6103f> | 3.59375 | 319 | Truncated | Science & Tech. | 50.724911 |
The Current Dewpoint image shows the dewpoint
, contoured every 10 degree F, for the most recent hour. The dewpoint
(or dewpoint) is the temperature
to which a given parcel of air must be cooled, at constant barometric pressure, for water vapor
to condense into water. The condensed water is called dew. The dewpoint
is ... | <urn:uuid:9e4e3139-377b-4ecb-a72c-f138a75585c7> | 4.3125 | 280 | Knowledge Article | Science & Tech. | 33.22753 |
Scripting is such a great way to relax. Well, at least in my eyes, that’s a great way to relax. Scripting can be as easy as telling your OS it needs to do something at a specific time or as complicated as synchronizing multiple folders on various servers on various platforms. (Insert example here). I thought it would b... | <urn:uuid:39c641dd-25d2-4522-a3e4-72f54a70df59> | 3.03125 | 626 | Personal Blog | Software Dev. | 52.37299 |
Guile-GSL is a C/Scheme library extension for Guile, the GNU's Ubiquitous Intelligent Language for Extensions. It implements a binding to the GNU Scientific Library (GSL). The purpose is to implement an environment similar to GNU Octave, but using Scheme as a programming language.
Guile-GSL is a part of GEE, a collecti... | <urn:uuid:77f8cfcb-62b1-4f60-8a04-d37ffae12506> | 2.9375 | 2,401 | Documentation | Software Dev. | 94.20755 |
Extinction is when a species dies out completely. It could be argued that it can occur before that, say, if there are only males or females left in a sexually reproducing species, or if the remaining pairs are geographically isolated preventing mating.
Evolutionists believe that over the history of the earth, many more... | <urn:uuid:3d6be173-e326-4599-8522-a0195b264b86> | 3.703125 | 126 | Knowledge Article | Science & Tech. | 29.478642 |
Ball, M. and Pinkerton, Harry (2006) Factors affecting the accuracy of thermal imaging cameras in volcanology. Journal of Geophysical Research - Space Physics, 111. B11203. ISSN 0148-0227Full text not available from this repository.
Volcano observatories and researchers are recognizing the potential usefulness of therm... | <urn:uuid:f2ab65e7-c394-4871-af74-567301682c56> | 2.75 | 702 | Academic Writing | Science & Tech. | 24.749416 |
So... what have X-ray and gamma-ray
done for ME? Very often, technologies developed for one purpose can be re-used
in other ways. NASA has an active program to encourage this for technologies
used in its research and exploration programs, to get the most out of each
taxpayer dollar. It does this by allowing businesses ... | <urn:uuid:2db9ca8b-5ffc-484d-99d8-2088d581cb1a> | 3.078125 | 161 | Knowledge Article | Science & Tech. | 46.822922 |