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Rocky Mountain Research Station Publications
RMRS Online Publication - Journal
Articles, External Publications, and Special Reports
Rill erosion in natural and disturbed forests: 1. Measurements
Robichaud, P. R.; Wagenbrenner, J. W.; Brown, R. E. 2010. Rill erosion in natural and disturbed forests: 1. Measurements. Wat... | <urn:uuid:0ee88a00-4fa0-425a-b414-c7ec3f61a132> | 2.8125 | 318 | Content Listing | Science & Tech. | 55.395 |
By ripcord on Friday, January 16, 2009 - 11:37 pm: Edit Post
John, can you provide a simple, understandable explanation as to how & why, and under what conditions, it's 'sometimes' possible for hot water to freeze faster than cold water?
I know it's possible to test this theory and come up with results both ways, but I... | <urn:uuid:212224f3-e4d3-42c6-a831-f9df41dda97b> | 3.21875 | 2,023 | Comment Section | Science & Tech. | 61.634375 |
STL for C++ Programmers
Author: Leen Ammeraal
Publisher: John Wiley
Reviewer: Bob Adkins
Good news—STL, Standard Template Library, is alive and well on Linux. Leen Ammeraal demonstrates this as well as his considerable skills as a master teacher in STL for C++ Programmers. Although the primary focus is not Linux, his m... | <urn:uuid:9702c015-a0a4-4668-bab7-03c3d6824b11> | 2.984375 | 1,348 | Knowledge Article | Software Dev. | 41.96728 |
or episodically changes the ground surface and complicates flood hazard mapping, especially along the Atlantic coast, which has dunes that are reshaped by storms, and, to a lesser degree, the Gulf coast.
Storm surge, tides, and waves are the greatest contributors to coastal flooding. Storm surge is the pulse of water t... | <urn:uuid:622efeec-a968-4d08-810d-c939831f37ed> | 4.15625 | 399 | Knowledge Article | Science & Tech. | 24.852858 |
Biological agent type
Plant species attacked
Click on image to view larger photo.
Egg and larval track
Images by Eric Coombs, Oregon Department of Agriculture.
Collecting adults on beating sheets
If images are downloaded and used from the ODA web site please be sure to credit the photographer.
Impact on target plant
Th... | <urn:uuid:2b85a363-8856-47fa-bd26-5a228f684959> | 3.5625 | 356 | Knowledge Article | Science & Tech. | 50.622972 |
Colour-magnitude diagrams - in which the absolute magnitude (Mv) of a selection of stars is plotted against their colour (B-V) - are frequently used in determining fundamental properties of the stars, and are commonly used as a teaching tool for explaining stellar evolution.
In this latter context, Andrew Gould has cre... | <urn:uuid:17bc47d5-5c87-44c0-8de5-eaee84489538> | 4.09375 | 277 | Knowledge Article | Science & Tech. | 27.017554 |
- Describe what you know about tsunamis.
- Explain why the force of even a small wave is enough to knock you over at the beach. (Hint: Think about the mass of water. One liter of water has a mass of one kilogram.)
- What do waves carry?
- Explain the link between earthquakes and tsunamis.
- What happens to a tsunami as... | <urn:uuid:93d00618-50b7-4b20-aa47-696cb70eb99f> | 3.640625 | 312 | Tutorial | Science & Tech. | 65.068312 |
The recent hurricanes and skyrocketing oil and gasoline prices helped to prove the existence of a new element. In early October 2005, a major research institution announced the discovery of the heaviest element yet known to science. The new element has been named "Governmentium."
Governmentium (Gv) has one neutron, 25 ... | <urn:uuid:aa161387-4c94-4856-b733-2b89a0e136c6> | 3.3125 | 335 | Knowledge Article | Science & Tech. | 37.923748 |
From Traffic jams without bottlenecks—experimental evidence for the physical mechanism of the formation of a jam by Yuki Sugiyama et al., New J. Phys. 10 (2008) 033001 (including movies).
If ever you have been driving on a crowded highway, chances are high that you have taken part in a similar "experiment", just that n... | <urn:uuid:f206132b-5292-472a-8c42-cb0ca5fe8b68> | 2.6875 | 846 | Personal Blog | Science & Tech. | 62.105252 |
John Newlands had published his Law of Octaves in 1865. The Law of Octaves had two elements in one box and did not allow space for undiscovered elements, so it was criticized and did not gain recognition.
A year earlier (1864) Lothar Meyer published a periodic table which described the placement of 28 elements. Meyer's... | <urn:uuid:5d6c6781-29b5-4410-aadc-c1aeef91b968> | 4.125 | 342 | Knowledge Article | Science & Tech. | 33.416357 |
We use polyurethane to make just about everything—garden hoses, furniture, the entirety of my local 99-cent store. It's easy to produce, durable, and dirt cheap. What it isn't is recyclable—there isn't a single natural process that breaks it down. That is until a newly-discovered Amazonian fungus takes a bite.
Pestalot... | <urn:uuid:8204dc26-b522-4f46-beba-105c9bb01bf1> | 3.453125 | 218 | Truncated | Science & Tech. | 25.64707 |
There is a vulnerability in Microsoft Windows caused by incorrect processing of malformed Embedded Open Type (EOT) fonts. This vulnerability can be used to achieve remote code execution if a user views a web page containing a reference to a specially crafted font file.
From Microsoft: Embedded OpenType (EOT) fonts are ... | <urn:uuid:ad86a302-c09f-44f2-a8bb-ec1bc70c6968> | 2.890625 | 368 | Knowledge Article | Software Dev. | 38.2096 |
Rare earth magnets are special kinds of magnets, and they behave in a very strange way when exposed to metals — especially copper. The faster they go, the more they slow down. Find out why, and take a look at people trying to force a slow-motion magnet to go fast.
Many people have played around with a magnet, but it's ... | <urn:uuid:7d35deaa-c8c4-4e5f-8a78-18e9d2dd98ec> | 3.40625 | 515 | Nonfiction Writing | Science & Tech. | 64.242446 |
According to the general theory of relativity, space itself is affected by the movement of massive objects. Like a ripple in a lake caused by a fallen rock, gravitational waves ripple out from the source of the motion and radiate through space, possibly affecting other objects.
Gravitational waves distort an object's g... | <urn:uuid:0c443744-48f8-4537-9125-c76440b408ea> | 4.625 | 355 | Knowledge Article | Science & Tech. | 34.820982 |
Caribbean Monk Seals, Monachus tropicalis
Taxonomy Animalia Chordata Mammalia Carnivora Phocidae Monachus tropicalis
Description & Behavior
Caribbean monk seals, Monachus tropicalis (Gray, 1850), (also formerly known as West Indian monk seals and West Indian seals) are now extinct. Adults of this species were grayish-b... | <urn:uuid:941ad125-1ed4-4094-a568-e3146f3c67da> | 3.453125 | 780 | Knowledge Article | Science & Tech. | 30.330247 |
Return to Mathematics Index
Elizabeth Kelly Pilsen Community Academy
1420 W. 17th Street
Chicago IL 60607
Students will reinforce their measurement skills. Students will manipulate
a launcher to create specific angles. Students will be introduced to the
concept of tangents. This is for the 7th and 8th grades.
Each grou... | <urn:uuid:00389363-ee9a-44d8-96cf-3dcb00ae9f81> | 3.96875 | 401 | Tutorial | Science & Tech. | 61.541804 |
January 16, 2013
The face of the blue bottle fly (Calliphora vomitoria). New research shows how this carrion-eater carries the mammals of the forest in his stomach. Photo by: J.J. Harrison.
Led by Sebastien Calvignac-Spencer with the Robert Koch Institute, a team of scientists have analyzed the DNA found in the stomach... | <urn:uuid:2135b1dd-b083-44c1-8398-2605aff3a6cd> | 3.40625 | 2,006 | Content Listing | Science & Tech. | 38.475511 |
These last two bases – called 5-formylcytosine and 5 carboxylcytosine – are actually versions of cytosine that have been modified by Tet proteins, molecular entities thought to play a role in DNA demethylation and stem cell reprogramming.
The discovery could advance stem cell research by giving a glimpse into the DNA c... | <urn:uuid:28e3c1f7-f505-4376-9564-d8e1fd3b581b> | 3.078125 | 799 | Truncated | Science & Tech. | 36.427438 |
While most constants are only defined in one namespace, the case-insensitive true, false, and null constants are defined in ALL namespaces. So, this is not valid:
<?php namespace false;
const ENT_QUOTES = 'My value';
echo ENT_QUOTES;//Outputs as expected: 'My value'
const FALSE = 'Odd, eh?';//FATAL ERROR! ?>
Fatal erro... | <urn:uuid:93cf676d-108b-4593-836a-726be5fab669> | 2.765625 | 784 | Documentation | Software Dev. | 51.617649 |
First glimpses inside an anti-atom
Oct 30, 2002
Physicists working on the Antiproton Decelerator at CERN have studied the internal states of anti-hydrogen atoms for the first time. The ATRAP team found that the antiprotons and positrons in their experiment combine to form anti-hydrogen atoms in highly excited states. I... | <urn:uuid:065dc173-cf95-4429-98cd-df1aff65cb22> | 3.484375 | 766 | Truncated | Science & Tech. | 30.651304 |
You know you blog about diverse topics when searches for "creamed spinach" and "mashed turnips" bracket things like "torture prisoners" and "why are echinoderms important". No good invertebrate-focused biologist could ever leave that last question unanswered, so here goes:
- They have a very cool water vascular system.... | <urn:uuid:7e03231e-bea7-4b46-9c08-169897ea0341> | 3.015625 | 166 | Personal Blog | Science & Tech. | 28.293295 |
A tour to a century old underground mine provides much more than expected.
Tags: experiments, mines, Minnesota, MINOS, neutrinos, Physics, science, Soudan, tours
On March 10, 2010 at 10:57 pm
Very well done, Katie. Both informative and leaving one wanting to know more. I was aware of this project but not with details s... | <urn:uuid:5c9a4619-87b0-4c0c-bb34-fb9549e99fda> | 3.109375 | 483 | Comment Section | Science & Tech. | 73.406061 |
Keep Watching the Ice
Meet the satellites bringing data to the discussion of global warming
- By Ben Iannotta
- Air & Space magazine, September 2006
IN EARLY MAY, WHEN MOST PEOPLE in the United States enjoy the warm days of spring, veteran NASA glaciologist Jay Zwally instead heads north to the ice-bound edge of wester... | <urn:uuid:a770e595-f9da-48bf-b0fc-3bf5679251fa> | 3.375 | 724 | Truncated | Science & Tech. | 44.646048 |
"It's like finding Moby Dick in Lake Ontario," says Tullis Onstott of the nematode worms his Princeton University team discovered living far beneath the Earth's surface in South Africa.
The tiny worms – just 500 micrometres long – were found at depths ranging from 900 metres to 3.6 kilometres, in three gold mines in th... | <urn:uuid:47360cee-9491-4562-8fd8-586a7f82df5d> | 3.59375 | 182 | Truncated | Science & Tech. | 54.762937 |
Stories in the Ice
by Peter Tyson
Online Producer, NOVA
Nature's Time Machine
How would you like to have a time machine that could take you back anywhere over the past 300,000 years? You could see what the world was like when ice sheets a thousand feet thick blanketed Canada and northern Europe, or when the Indonesian ... | <urn:uuid:37d1f1d1-13e0-4b7f-baee-846e697efdbd> | 3.6875 | 388 | Truncated | Science & Tech. | 31.535992 |
|Jul13-10, 02:47 AM||#1|
Qualitatively define entropy
I want to know a concrete qualitative definition of entropy.
If we define it to be a measure of randomness (disorder) in a system then as per intuition it would mean that a system with less probability in a given microstate will have greater entropy. But as per stat... | <urn:uuid:665b43cb-2865-4e8f-a32e-3a27409116e0> | 3.046875 | 788 | Comment Section | Science & Tech. | 55.347926 |
Oracle Database is the first database designed for enterprise grid computing, the most flexible and cost effective way to manage information and applications.
An Oracle database is a collection of data treated as a unit. The purpose of a database is to store and retrieve related information. A database server is the ke... | <urn:uuid:6b507915-24c5-4ebd-8160-17f26d99bafa> | 3.34375 | 273 | Knowledge Article | Software Dev. | 31.528292 |
Because these processes happen beneath the Sun's visible surface -- the photosphere -- they can't be seen from Earth, and it's very difficult to conduct experiments. Computer simulations provide a way to see what's otherwise unseeable. The difficulty has to do with the complexity of the flow. Along with general feature... | <urn:uuid:a8c73cc3-03d4-4566-8890-2b17906294c4> | 3.96875 | 790 | Academic Writing | Science & Tech. | 39.983227 |
California Beetle Project > Species Pages > Narpus angustus
Scientific name: Narpus angustus Casey
Images (click to enlarge)
What it looks like:
3-4 mm in length. Its body is dark brown with striae, or shallow punctures, running the length of its elytra. The rows of striae alternate with rows of light brown, short hair... | <urn:uuid:79a26480-91c6-47d7-9559-f94d2d24b990> | 3.375 | 156 | Knowledge Article | Science & Tech. | 55.525 |
Here is an attempt at explaining why. Magnetic fields are additive, and by this fact, one would expect that putting two equal magnets together would double the field strength. However, magnetic field strength drops off exponentially as you move away, so the pull is at its strongest right at the surface, but significant... | <urn:uuid:aad2db3c-f1a6-41ff-bb61-226d63d856f2> | 2.921875 | 274 | Comment Section | Science & Tech. | 64.363517 |
Asteroids are massive lumps of rock that orbit the Sun. They can be anything up to 1000 kilometers wide and are sometimes described as minor planets.
Most asteroids in the Solar System lie in a belt - the Asteroid Belt - orbiting the Sun between Mars and Jupiter, but some are orbiting relatively nearby. These nearby as... | <urn:uuid:e706a4a4-fbaf-4393-82d3-f30e3ba872ef> | 3.5 | 499 | Truncated | Science & Tech. | 54.663929 |
How to tell a butterfly from a moth
Butterflies and moths are in the same order (Lepidoptera, which comes from the Greek words lepidos for scale and pteron for wings). Many people have trouble telling them apart, but once you know what to look for, itıs easy to tell which is which.
Butterflies have skinny antennae with... | <urn:uuid:0957e373-5662-4b49-9e27-eea9eeb2ee3e> | 3.484375 | 218 | Knowledge Article | Science & Tech. | 66.646684 |
In this compiler step, the default modifiers for classes, methods, properties, and fields are added where appropriate.
Classes and other types are by default public, properties, methods, and events are made public by default, and fields are by default protected.
A constructor is added to a class definition if it does n... | <urn:uuid:d260f580-29da-4ca4-9673-ee28bc6f7419> | 2.890625 | 129 | Documentation | Software Dev. | 50.90875 |
Monday, July 16, 2012 at 10:42 AM
Webmaster level: All
In web development context, semantics refers to semantic markup, which means markup used according to its meaning and purpose.
Markup used according to its purpose means using heading elements (for instance,
h6) to mark up headings, paragraph elements (
p) for para... | <urn:uuid:1d850790-2f7c-4007-83c1-2c780881f222> | 3.546875 | 1,100 | Personal Blog | Software Dev. | 41.334074 |
Credit: MIT and the HETE-2 Team
Renee, Stargazer and HETE-2
HETE-2, the High Energy
Transient Explorer, is a space observatory designed to scan the sky to
look for strange explosions in space called Gamma Ray Bursts. HETE-2 will
find these bursts and let astronomers know about them within minutes for
followup studies. ... | <urn:uuid:4408ce32-cd9b-40ff-882f-971203bcfc13> | 2.90625 | 350 | Knowledge Article | Science & Tech. | 51.46076 |
Daily Tech: Sun Makes History: First Spotless Month in a Century.
The event is significant as many climatologists now believe solar magnetic activity – which determines the number of sunspots -- is an influencing factor for climate on earth.
Delta Farm Press: Global cooling gains momentum among scientists.
“Carbon diox... | <urn:uuid:d875e843-4a5b-4fa1-a5c7-fe34cf954a57> | 3.078125 | 682 | Personal Blog | Science & Tech. | 52.814161 |
Order By Clause (Visual Basic)
Specifies the sort order for a query result.
You can use the Order By clause to sort the results of a query. The Order By clause can only sort a result based on the range variable for the current scope. For example, the Select clause introduces a new scope in a query expression with new i... | <urn:uuid:bcdf3b45-2bff-4fc7-b3d4-304d886a402a> | 2.78125 | 385 | Documentation | Software Dev. | 47.283627 |
Barn Pole Paradox
Date: Winter 2011-2012
I do not see how this relativity problem is explained. Its a variation of the barn pole paradox. Can you offer insights?
Einstein’s special relativity theories apply to constant VELOCITY situations. This means no change of speed or direction. An observer on the ring is constantl... | <urn:uuid:f0dfbd2f-5454-4bfa-8654-b5b5188e5e06> | 2.984375 | 199 | Q&A Forum | Science & Tech. | 48.406367 |
The James Webb Space Telescope (JWST) will be the premiere observatory of the next decade, serving thousands of astronomers worldwide. It will study every phase in the history of our Universe, ranging from the first luminous glows after the Big Bang, to the formation of solar systems capable of supporting life on plane... | <urn:uuid:a809cd21-4131-4190-991e-f98515ca04eb> | 3 | 284 | Content Listing | Science & Tech. | 42.514392 |
Cascading Style Sheets
Cascading Style Sheets are a big breakthrough in Web design because they allow developers to control the style and layout of multiple Web pages all at once. Before Cascading Style Sheets, changing an element that appeared on many pages required changing it on each individual page. Cascading Style... | <urn:uuid:6925b78c-ca22-4174-bcee-9ba804e3fc1b> | 2.828125 | 192 | Knowledge Article | Software Dev. | 46.80375 |
Mystery of the Megavolcano
A remote lake in Southeast Asia conceals evidence of Earth's greatest volcanic cataclysm of the last 100,000 years. Miles beneath its placid surface lies a magma chamber that exploded so violently during the Ice Age that gases and ash may have encircled the globe and blotted out the sun for y... | <urn:uuid:62783aee-6902-49ee-835a-2bf4df98af34> | 3.234375 | 131 | Truncated | Science & Tech. | 27.760642 |
Introductionmetal, chemical element displaying certain properties by which it is normally distinguished from a nonmetal, notably its metallic luster, the capacity to lose electrons and form a positive ion, and the ability to conduct heat and electricity. The metals comprise about two thirds of the known elements (see p... | <urn:uuid:fc33d595-a2d6-4c76-a43b-63e82368cd1a> | 3.625 | 126 | Knowledge Article | Science & Tech. | 20.833333 |
|Nathalie Baumann, MSc / Biogeograph, Research Associate at ZHAW - the Zurich University of Applied Sciences - Institute of Environment and Nature Ressources, Centre of nature management-Urban Greening,Competence Centre Green Roofs, is researching several greenroofs in peri-urban areas in Switzerland. The driver for th... | <urn:uuid:28c3fa7f-2b23-4ebb-9e8d-50a033eb8ae4> | 3.03125 | 565 | Knowledge Article | Science & Tech. | 38.556954 |
The aim of this task is to give you some (additional) experience at jQuery and Ajax programming.
Study the HTML and jQuery code in this example to see how class attributes and event handlers can dynamically be added to a "clean" HTML document when the document is loaded.
Now consider the simplified user registration do... | <urn:uuid:ce0be049-3462-4168-92d5-e39a8c008fe0> | 2.75 | 332 | Tutorial | Software Dev. | 46.844318 |
Binnig, Gerd (gĕrt bĭnˈĭkh) [key], 1947–, German physicist, Ph.D. Univ. of Frankfurt, 1978. At the IBM Research Laboratory in Zürich, Binnig and fellow researcher Heinrich Rohrer built the first scanning tunneling microscope, an instrument so sensitive that it can distinguish individual atoms. For their innovation they... | <urn:uuid:3421a6df-5f8a-4da8-864a-f77090c62794> | 2.8125 | 176 | Knowledge Article | Science & Tech. | 38.563095 |
Properties of Ice
|Crystalline Structure of Ice.
Ice can assume a large number of different
crystalline structures, more than any other known material. At ordinary pressures
the stable phase of ice is called ice I, and the various high-pressure phases of ice
number up to ice XIV so far. (Ice IX received some degree of ... | <urn:uuid:ae9be8d7-e17b-4ec2-8215-edf33cb3ef53> | 3.75 | 914 | Knowledge Article | Science & Tech. | 49.25524 |
JPL's Atmospheric Infrared Sounder Experiment captured this infrared view of Hurricane Ivan in September 2004. The instrument, which flies aboard NASA's Aqua satellite, measures the temperature of cloud tops. The lowest temperatures (seen in purple) are associated with high, cold cloud tops that make up the top of the ... | <urn:uuid:769638fe-a823-4078-8d6c-610e41b00797> | 3.234375 | 83 | Truncated | Science & Tech. | 40.114773 |
Basic concepts of classical physics.
Some people doubt the correctness of certain physical principles. Some are inventing modifications of physics. It's good to know excatly which principles they do accept as correct, to see whether there is any common ground for discussion. Which of these do you accept as correct?
- N... | <urn:uuid:36b81a86-c2fd-4df3-9efd-da2d3a25851d> | 3.546875 | 653 | Knowledge Article | Science & Tech. | 50.733218 |
About this Image
Dubai undertook a massive engineering project to create hundreds of artificial islands along its Persian Gulf coastline. Built from sand dredged from the seafloor and protected from erosion by rock breakwaters, the islands were shaped into recognizable forms, including a map of the world (shown here). ... | <urn:uuid:3b8bcc62-c826-4358-974b-01e0fdb7d6af> | 3.375 | 117 | Knowledge Article | Science & Tech. | 35.510714 |
Name: Ross J.
What exactly makes fruit rot?
The goal of a fruit is to spread its seed, so it needs to rot in order to get
the seeds out of the fruit. There are actually hormones, especially ethylene
oxide that promote fruit ripening. If you want to get a piece of fruit to
ripen, put it in a bag with an apple which gene... | <urn:uuid:de66df51-4cc9-4eaf-b9f6-c4522536cf57> | 3.578125 | 334 | Q&A Forum | Science & Tech. | 56.658173 |
Forecasters and scientists are predicting an El Nino year. Antonio Neves reports on the climate patterns and chain of events that occur around the world.
the.Sci covers STEM topics such as science, technology, engineering, and mathematics and puts them in context with current events. These stories explain how things wo... | <urn:uuid:0a68c3b5-e6d5-4143-8719-c0dc3547dd8a> | 3.015625 | 210 | Content Listing | Science & Tech. | 30.629318 |
Search our database of handpicked sites
Looking for a great physics site? We've tracked down the very best and checked them for accuracy. Just fill out the fields below and we'll do the rest.
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95 are Websites,
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and 0... | <urn:uuid:8942070c-3b00-4911-a819-b9d27cf19e37> | 2.734375 | 348 | Content Listing | Science & Tech. | 49.393406 |
Gravity is a very important force. Every object in space exerts a gravitational pull on every other, and so gravity influences the paths taken by everything traveling through space. It is the glue that holds together entire galaxies. It keeps planets in orbit. It makes it possible to use human-made satellites and to go... | <urn:uuid:f98fef74-a136-4196-95d6-e8292b2fe24e> | 3.953125 | 167 | Knowledge Article | Science & Tech. | 54.337356 |
Among presentations at the National Climate Change Adaptation Forum April 2-4, 2013 were case studies of projects in different ecosystems that are addressing the effects of climate change. Short videos tell stories unfolding in three locations.
Sunrise at Black Creek Preserve.
Photo: R Rodriguez, Jr., www.scenichudson.... | <urn:uuid:5d7c5736-8f10-4926-82cc-700ec8faf4cc> | 3.109375 | 438 | Content Listing | Science & Tech. | 20.944666 |
This thing. Please tell me if if my facts are right, since none of my material really covers it and I have had to piece this together from practice problems.
1. This is formed when 2 sound waves encounter each other
2. The distance between the two purple dots is the wavelength of the beat
3. The distance between the gr... | <urn:uuid:765a4606-23fb-41d7-b47f-eab33e865c2e> | 2.703125 | 115 | Comment Section | Science & Tech. | 68.656193 |
Broadening of Spectral Lines
In the study of transitions in atomic spectra, and indeed in any type of spectroscopy, one must be aware that those transitions are not precisely "sharp". There is always a finite width to the observed spectral lines.
One source of broadening is the "natural line width" which arises from th... | <urn:uuid:72b481a2-46ea-4b98-a296-dacb56aad052> | 3.265625 | 405 | Knowledge Article | Science & Tech. | 29.304399 |
For detailed information on Oklahoma earthquakes, or to report an earthquake, go to http://www.okgeosurvey1.gov/
For more information on world-wide earthquakes go to:
A brief update on the 2009 Oklahoma earthquakes northeast of Oklahoma City:
On average there are about 50 measurable earthquakes each year in Oklahoma wi... | <urn:uuid:4b3d689e-2682-4e3d-aabd-437c40d1907e> | 3.21875 | 270 | Knowledge Article | Science & Tech. | 41.15471 |
|» Metadata||» Status|
Sqlite is a lightweight embedded database library. It is a small C library that implements a self-contained, embeddable, zero-configuration SQL database engine and is included by default with PHP 5.
Sqlite_Tools is an object oriented interface to effectively manage and backup Sqlite databases.
Wh... | <urn:uuid:9018f29c-03cf-4af4-8874-7d3dd3994fa2> | 2.859375 | 360 | Documentation | Software Dev. | 24.002473 |
Yes Scott that is a very good point the universe could indeed extend way beyond the horizon of our visible universe, in just the same way as the horizon on Earth limits our view of the surface. However current thinking suggests otherwise.
I think we are at crossed purposes Doonhamer?
Yes I accept that I may very well b... | <urn:uuid:3b5b44f3-46f5-419c-b4ce-9c76793dfd60> | 2.890625 | 721 | Comment Section | Science & Tech. | 60.914553 |
ESA Scientists Capture the Lion's Offspring Down Under
28 Nov 2001
(Source: European Space Agency)
ESA Science News
Dr. Detlef Koschny
ESTEC, Noordwijk, Netherlands
After an eventful trip to the other side of the world, ESA's intrepid scientists have returned with a treasure trove of data about the 2001 Leonid meteor s... | <urn:uuid:fa25ed0a-d36e-48b9-aaa4-24553f54779a> | 2.75 | 1,385 | Audio Transcript | Science & Tech. | 51.044739 |
The First 360 view of the Full Sun
From NASA Heliophysics. Seeing the whole sun front and back simultaneously will enable significant advances in space weather forecasting for Earth, and improve planning for future robotic or crewed spacecraft missions throughout the solar system.
These views are the result of observat... | <urn:uuid:5c06fb1a-9ea5-4ec3-818f-ec3e25f0f804> | 3.84375 | 203 | Knowledge Article | Science & Tech. | 45.998333 |
How does mathematics research affect approaches to everyday problems? What is the “Netflix problem” and what does it have to do with math?
To find out, WID communications sat down with Ben Recht, assistant professor of computer sciences and researcher in the institute’s Optimization group, who recently received the Lag... | <urn:uuid:0d608fa9-348f-4431-9f9c-bb40c6dde0fd> | 2.953125 | 840 | Audio Transcript | Science & Tech. | 48.357917 |
Ask a question about 'Amaranthus albus'
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Answer questions from other users
is an annual species of flowering plant
The flowering plants , also known as Angiospermae or Magnoliophyta, are the most diverse group of land plants. Angiosperms are seed-producing plants like the ... | <urn:uuid:bcf60c85-cb35-43a6-8017-2c2b636c18bd> | 3.609375 | 341 | Q&A Forum | Science & Tech. | 37.040747 |
Water Droplet Experiencing Leidenfrost Effect
When a drop of liquid lands on a surface much hotter than its boiling point, the bottom layer of the drop vaporizes instantly. The gas pressure from the vapor layer keeps the liquid droplet from touching the hot surface. The vapor layer is too thin to be easily seen but it’... | <urn:uuid:c08c31de-a8fa-4179-b4e5-4942951aadb8> | 3.703125 | 326 | Knowledge Article | Science & Tech. | 35.404412 |
The Lunar Late Heavy Bombardment
- The small craters can be saturated on the oldest surfaces,
but probably not the basins.
- There are more than 40 basins (D>300km) on the Moon.
- They are all older then ~3.8Gyr (Wilhelms 1987).
- Historically, the issue of the nature of the bombardment comes down to the ages of three.... | <urn:uuid:82eb6238-d35f-4e15-9bd4-73e12a78f4e0> | 3.59375 | 357 | Academic Writing | Science & Tech. | 72.936598 |
Calambokidis, J., J. Barlow, J.K.B. Ford, T.E. Chandler, and A.B. Douglas. 2009. Insights into the population structure of blue whales in the eastern North Pacific from recent sightings and photographic identifications. Marine Mammal Science 25:816-832
full PDF. The definitive version is available at Wiley
and some of ... | <urn:uuid:e77ee3c0-6509-4fa1-a0a8-fc51535a1a6d> | 3.375 | 389 | Academic Writing | Science & Tech. | 43.984499 |
Read here and here. Climate "scientists" across the world have been blatantly fabricating temperatures in hopes of convincing the public and politicians that modern global warming is unprecedented and accelerating.
The scientists doing the fabrication are usually employed by the government agencies or universities, whi... | <urn:uuid:ddb7c4c6-f11a-4bf1-8619-aed13834dc50> | 2.734375 | 234 | Personal Blog | Science & Tech. | 39.5775 |
|Figure 1. Printing and Previewing Plain Text: Here's the main form of the TextPrinting Project in Part II of this series, along with the print preview form from the same project.|
art I of this solution series explores VB's basic printing concepts: the Printer object, page geometry, graphics methods, and the Print com... | <urn:uuid:30ff34e8-ccee-4bc0-880a-947c6054066b> | 2.8125 | 635 | Tutorial | Software Dev. | 53.128303 |
Most galaxies in the Local Group are dwarf systems, fainter by factors of 100 to more than 10,000 than giant galaxies. These insignificant objects nonetheless provide a strong constraint on the nature of dark matter.
While most of the stars in the Universe reside in giant galaxies like the Milky Way, numerically the mo... | <urn:uuid:82471459-a2df-416d-8b5b-d3e19936f2c2> | 3.34375 | 2,435 | Academic Writing | Science & Tech. | 55.879826 |
Science Main Index
Almost three-fourths of the world's surface is covered in
water. This water is home to over 20,000 different species of
fish. The earliest fossils of fish date back over 400 million
There are a wide variety of fish from the goby which is less than
one half an inch long, to the whale shark which can b... | <urn:uuid:3f20cde6-5136-4eff-b2fe-6f2678f2b3d7> | 3.40625 | 412 | Knowledge Article | Science & Tech. | 65.397308 |
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Formula for ratio of weights at different latitudes
As you know, the Earth is not a perfect sphere so a person’s weight varies from place on place on the surface of the globe. Assuming that the Earth is an ellipsoid (that is, the intersection of the Earth with a plane passing through the Poles is... | <urn:uuid:6c456316-8ff5-4823-b43b-767f2259b00c> | 3.140625 | 362 | Q&A Forum | Science & Tech. | 64.556848 |
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Any of a subgroup of amphibole minerals that are calcium-iron-magnesium-rich and monoclinic in crystal structure. Hornblende, whose generalized chemical formula is (Ca,Na)(Mg,Fe,Al)(Al,Si)O(OH), occurs widely in metamorphic and igneous rocks. Common hornbl... | <urn:uuid:a216f875-3d79-437b-9ec1-11512b03d2c2> | 2.90625 | 162 | Structured Data | Science & Tech. | 35.255196 |
Look up monthly U.S., Statewide, Divisional, and Regional Temperature, Precipitation, Degree Days, and Palmer (Drought) rankings for 1-12, 18, 24, 36, 48, 60-month, and Year-to-Date time periods. Data and statistics are as of January 1895.
Please note, Degree Days are not available for Agricultural Belts
Contiguous U.S... | <urn:uuid:c0f2997d-ad7e-43d2-a42d-49302509ab04> | 2.75 | 143 | Structured Data | Science & Tech. | 60.488056 |
The world's most ambitious scientific experiment is buried 100 meters underground, straddling Switzerland and France. A billion times every minute, the Large Hadron Collider (LHC) slams together protons, while four giant detectors watch closely.
- So how does the Large Hadron Collider work?
- Why can slamming tiny part... | <urn:uuid:499865e7-6e3a-40d1-9d9f-a59fb976dab3> | 3.6875 | 182 | Truncated | Science & Tech. | 53.878373 |
Al Gore urges everyone to plant trees in An Inconvenient Truth. But where, asks Dickson Despommier, a 67-year-old microbiologist at Columbia University, can we plant them if, as scientists suggest, more and more of the world's forests will soon become farmland to support our explosive population growth? Nearly 41 perce... | <urn:uuid:a5e30293-1b4f-4ebc-8e21-1a461960825d> | 3.046875 | 931 | Audio Transcript | Science & Tech. | 59.81458 |
Want to stay on top of all the space news? Follow @universetoday on Twitter
Object Name: Messier 42
Alternative Designations: M42, NGC 1976, The Great Orion Nebula, Home of the Trapezium
Object Type: Emission and Reflection Nebula with Open Galactic Star Cluster
Right Ascension: 05 : 35.4 (h:m)
Declination: -05 : 27 (d... | <urn:uuid:7aa0f59a-ccc2-42f5-a590-1871b8d1bac1> | 3.484375 | 2,636 | Knowledge Article | Science & Tech. | 50.062629 |
'The Lycaenidae are members
of the Superfamily
Papilionoidea, the true butterflies. Worldwide in distribution, this family
has approximately 4,700 species that are unevenly distributed. Coppers are especially dominant in north temperate regions
, blues are richest
in the Old World tropics and north temperate
zones, and... | <urn:uuid:606b5a01-56a2-4322-9a7c-7fad8ab56d38> | 3.765625 | 1,609 | Knowledge Article | Science & Tech. | 53.972861 |
Some materials have the curious property of being magnetic under normal everyday conditions - for example, they stick to the metallic door of your fridge. Technically speaking, they show a spontaneous magnetisation at room temperature, and are called ferromagnetic, for the Latin name of iron, which is the prototype of ... | <urn:uuid:5f8d3882-1d40-4123-9c83-74562432ca7d> | 3.796875 | 1,280 | Personal Blog | Science & Tech. | 36.799366 |
Posted on April 13th, 2009 No comments
On 13th April 2029, twenty years from today, the asteroid designated Apophis (full designation 99942 Apophis, originally designated 2004 MN4) is going to come very close to the Earth. It originally caused a brief period of concern throughout December 2004 because some initial obse... | <urn:uuid:9ff315b2-3732-42b3-959b-4e21d9ca8afc> | 3.671875 | 343 | Personal Blog | Science & Tech. | 48.20023 |
(Submitted Apil 23, 2007)
How far away is the furthest known galaxy?
The most distant galaxy known today is called IOK-1, with a redshift of
6.964 which puts it about 12.88 billion light years away from earth.
Here is more information:
A galaxy called Abell 1835 IR1916 was found in 2004 and was originally
thought to be... | <urn:uuid:43f13c12-5942-4f5e-9c55-cd75c2a3d56e> | 3.28125 | 151 | Q&A Forum | Science & Tech. | 60.681364 |
Counting Fish from a Submersible
August 30, 2001
Andrew Shepard, Director
National Undersea Research Program University of North Carolina at Wilmington
One objective of our mission is to make a quantitative assessment of the distribution and abundance of fishes living on Oculina Bank. So, how are fish counted in the oc... | <urn:uuid:aa81012d-b4a2-4a77-8853-be4527ecfc87> | 3.75 | 2,729 | Knowledge Article | Science & Tech. | 42.668247 |
Evolution as Reproduction with Variability
Evolution as Reproduction with Variability
Biological evolution is often thought of as a process by which adaptation is generated through selection. While it is recognized that random variation underlies the process, emphasis is usually placed on selection and resulting adapta... | <urn:uuid:078d5f29-1af5-4725-8f51-850f6b6b1fdc> | 3.484375 | 1,265 | Tutorial | Science & Tech. | 29.365802 |
Locking is essential in threaded programs. It restricts code from being executed by more than one thread at the same time. This makes threaded programs reliable. The lock statement uses a special syntax form to restrict concurrent access.
Lock is compiled into a lower-level implementation based on threading primitives.... | <urn:uuid:e135547d-c613-4b35-a5cc-44f0142aadff> | 4.15625 | 776 | Documentation | Software Dev. | 52.640456 |
Have you ever wondered why stars twinkle? It's caused by poor seeing conditions and is the bane of Earthbound astronomers. Some stars twinkle and change color so rapidly that they have been reported as UFOs.
Poor seeing conditions are caused by turbulent mixing in the Earth's atmosphere. Light from stars must go throug... | <urn:uuid:d05ff9a7-c70d-4299-b34c-4090e2ddf7c3> | 3.65625 | 363 | Knowledge Article | Science & Tech. | 45.36549 |
- With an average depth of less than 20 meters (65 feet), Lake
Erie is the shallowest of the Great Lakes. According to the map
labeled Lake Erie Depth, the west basin of
Lake Erie is (deeper) (shallower) than the east basin.
- In general, shallower areas of a lake store less heat, cool
off faster in autumn, and are usu... | <urn:uuid:28c3b88c-0dde-4daf-b42c-007396786110> | 4 | 467 | Knowledge Article | Science & Tech. | 42.844342 |
Category #4 includes all non-harmful mutations that do not fall under categories
#1-#3 above. These organisms greatly outnumber the first three types. By defi-
nition, they do not have any direct bearing on the calculations.
Using the mean estimates of mutation rates and categorizations we’ll now choose
a saturation cy... | <urn:uuid:2755b9f6-61db-4660-be5f-7cb56fc3979b> | 2.859375 | 935 | Documentation | Science & Tech. | 46.979264 |
concatenate result-type &rest sequences => result-sequence
Arguments and Values:
result-type---a sequence type specifier.
result-sequence---a proper sequence of type result-type.
concatenate returns a sequence that contains all the individual elements of all the sequences in the order that they are supplied. The sequen... | <urn:uuid:d6828a64-35ed-4f72-96d1-a4a8956f913b> | 3.34375 | 433 | Documentation | Software Dev. | 37.01072 |
NASA may alter the design of its upcoming Mars Science Laboratory rover so it will not only crush and analyse soil and rocks on the Red Planet, but will also store samples for a future mission to deliver to Earth. The possible change could shorten the wait time for a Mars sample return mission, which a new report ranks... | <urn:uuid:930d3cd2-ef36-4b6f-8194-0902abff7fa1> | 3.421875 | 1,280 | Comment Section | Science & Tech. | 45.130054 |
Zap a metal with light and the electrons on the surface ripple into waves - known as plasmons - which emit light of their own. The frequency of that light reflects the electronic nature of the surface and is highly sensitive to contamination.
Kevin Tetz and colleagues in the Ultrafast and Nanoscale Optics Group at the ... | <urn:uuid:0db5963e-8287-456a-9395-0845f1695517> | 3.203125 | 1,019 | Comment Section | Science & Tech. | 48.204561 |
Fluids and Fault Lines
by G. Golitsyn
Why large earthquakes are rather rare.
Carl Friedrich Gauss (part II)
by S. Gindikin
More about this "prince of mathematicians."
The eye and the sky
by V. Surdin
The art of seeing distant objects.
Physics Contest: Tunnel trouble
by Larry D. Kirkpatrick and Arthur Eisenkraft
New twi... | <urn:uuid:25d51988-62e0-47ab-afd4-d58fe26f211a> | 2.75 | 324 | Content Listing | Science & Tech. | 56.392351 |
Steve wants to be a biohacker. He has no access to a wet lab but he has done a few molecular biology classes and is up-to-date on the state of the art. He sends away for a kit and 4 to 8 weeks later receives it in the mail. It includes a biohacker device to be connected to his computer and a number of vials of a specia... | <urn:uuid:98be2a7d-4269-4c55-8684-2e0b8538d61c> | 2.953125 | 743 | Personal Blog | Science & Tech. | 44.480939 |
PHP stands for PHP: Hypertext Preprocessor. The first P is actually recursive. It is created by Rasmus Lerdorf in 1995 and was expanded as Personal Home Page, but was renamed to this form in version 3.0 when released in June 1998. Now PHP is greatly popular.
You might have wondered seeing the number of opportunities fo... | <urn:uuid:da9be74a-0597-48c7-945f-9981ed5b4f3e> | 3.453125 | 1,240 | Documentation | Software Dev. | 48.730908 |
Ever since brown tree snakes were inadvertently brought into Guam from the Solomon Islands after the Second World War, they've been going about their natural business of targeting bats, birds, lizards, and small mammals -- in the course of which they've (also inadvertently) wiped out or significantly reduced a number o... | <urn:uuid:a4475a3f-388d-423e-a6dd-c845a6b1598d> | 3.296875 | 516 | Truncated | Science & Tech. | 43.542503 |
Narrator: This is Science Today. Cosmologists at the University of California, Irvine's Center for Cosmology are trying to tackle some of the oldest and longstanding questions in science ... and humanity.
Bullock: Questions like how old is the universe? How big is the universe? What is it made of? These are really the ... | <urn:uuid:2156f8d2-9b89-4b9f-9343-f84c5eb1c449> | 3.0625 | 249 | Audio Transcript | Science & Tech. | 48.558435 |
My friend Brightblades is right in one thing. It seems your teacher was working off a caricature of what the theory of evolution actually says. First of all, you should read Sklivvz's excellent answer at this question. Now to address the elephant in the room, the accident at Chernobyl only happened in 1986. That was on... | <urn:uuid:b329facc-745c-4d12-afb3-239d0197f39b> | 3.15625 | 1,160 | Q&A Forum | Science & Tech. | 28.944874 |
Mountain Climate Simulator
Entry ID: MTCLIM
Abstract: MT-CLIM is a computer program that uses observations of daily maximum
temperature, minimum temperature, and precipitation from one location (the
"base") to estimate the temperature, precipitation, radiation, and humidity at
another location (the "site"). The base an... | <urn:uuid:67367d95-ab1e-4316-a4ce-1dccc2d464a1> | 3 | 691 | Academic Writing | Science & Tech. | 30.185295 |
A self-perpetuating bamboo disturbance cycle in a neotropical forest
We investigate a hypothesis for explaining maintenance of forest canopy dominance: bamboo (Guadua weberbaueri and Guadua sarcocarpa) loads and crushes trees, resulting in a self-perpetuating disturbance cycle. Forest inventory data revealed a peculiar... | <urn:uuid:52a921a1-8031-4b54-bf4c-10d39f06f59d> | 2.9375 | 347 | Academic Writing | Science & Tech. | 30.345314 |
The fast-track technology, called marker-assisted selection (MAS), or molecular breeding, takes advantage of rapid improvements in genetic sequencing, but avoids all the regulatory and political baggage of genetic engineering. Bill Freese, a science policy analyst with the Center for Food Safety, a nonprofit advocacy g... | <urn:uuid:842f5ae4-eb89-4615-babf-d77f748fbbb8> | 3.40625 | 336 | Nonfiction Writing | Science & Tech. | 23.264887 |
As for the normal distribution, you can characterize it as the unique distribution with the following properties:
Let $X_1, X_2, \cdots X_n$ be independent identically distributed normal random variables. Then the joint distribution of the vector $X=(X_1, X_2, \cdots X_n)$ is the same as that of $AX$ where $A$ is any o... | <urn:uuid:481b9623-d76c-4087-8b0c-fd75ee36fb79> | 2.984375 | 364 | Q&A Forum | Science & Tech. | 42.813776 |
48 is called an abundant number because it is less than the sum of
its factors (without itself). Can you find some more abundant
If the answer's 2010, what could the question be?
There is a clock-face where the numbers have become all mixed up. Can you find out where all the numbers have got to from these ten statement... | <urn:uuid:117b7c27-ed15-40eb-93f8-0db73dca5f3f> | 3.21875 | 1,503 | Content Listing | Science & Tech. | 76.915311 |