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In 1905, Einstein published four revolutionary papers in the journal Annalen der Physik, including papers explaining the photoelectric effect and the fundamentals of his special theory of relativity. His work laid the foundation for the field of quantum physics, though he himself had some concerns about the conceptual ... | <urn:uuid:92074c1b-4aa3-4d58-b69b-9da90caee06b> | 3.640625 | 415 | Knowledge Article | Science & Tech. | 36.222543 |
Tom Wessels, MA
Department of Environmental Studies
Protecting biodiversity at a local level is integral to protecting global biodiversity. An inventory of plant communities for one town gives a representation of the spectrum of plant species which a region might support. This paper surveys the plant communities of Can... | <urn:uuid:3efa55d4-1ae6-4b73-877f-00750823230b> | 2.6875 | 119 | Academic Writing | Science & Tech. | 22.995366 |
A variety of human activities pose serious threats to life in the Mojave Desert. Use of desert lands for livestock grazing can strip land of most of its vegetation. Farming and urbanization both result in increased use of groundwater that can leave desert plants and animals without the water they need to survive. The g... | <urn:uuid:0a733281-eb6c-4ff3-95cf-a78e9e84be53> | 4.03125 | 1,446 | Tutorial | Science & Tech. | 54.361283 |
Halupka, L., Dyrcz, A. and Borowiec, M. 2008. Climate change affects breeding of reed warblers Acrocephalus scirpaceus. Journal of Avian Biology 39: 95-100.
What was done
The authors documented various breeding parameters of reed warblers -- long-lived passerine birds that spend their winters in Africa but breed in ree... | <urn:uuid:c1999679-be64-41bb-a620-b8f703e4ca5e> | 3.40625 | 492 | Knowledge Article | Science & Tech. | 57.586866 |
You may never be able to escape the effects of gravity (in its entirety), but you can reduce it, freeing yourself from the stress of lifting objects of greater density than yourself.
One of the best places to do this is by launching yourself beyond the sky in order to get a glimpse of the heavens above. But staying the... | <urn:uuid:d261cfdb-a4e9-422e-8b85-593af50964a2> | 3.109375 | 548 | Personal Blog | Science & Tech. | 33.677241 |
Meteor impact that gouged 30-mile crater on Mars reveals traces of ancient reservoir
- Crater reveals layers thought to have been carved by groundwater reservoir
- Lends weight to idea that Mars was once very different
- Mars has 'undergone radical climate change'
By Rob Waugh
Two side-by-side meteor craters on Mars ha... | <urn:uuid:09f50e68-1c0e-48d0-945c-782b43818fce> | 3.09375 | 567 | Truncated | Science & Tech. | 31.061 |
A smooth, sleek reptile with scales and no legs. No, it’s not the Slytherin house’s mascot from Harry Potter – snake. It is a legless lizard! It is one of the 14 newly discovered species in central Brazil’s Cerrado, the sixth largest ecoregion in the world. More than half of its original area has been lost to agricultu... | <urn:uuid:ae7e6351-5de3-4ca5-8186-3d5a07ea4137> | 3.515625 | 812 | Content Listing | Science & Tech. | 44.401257 |
- Infowars - http://www.infowars.com -
‘Perfect’ Invisibility Cloak Uses Metamaterials To Bend Light
November 12, 2012
The days when invisibility cloaks were confined to the world of “Harry Potter” may soon be over. Physicists at Duke University announced Monday that they had successfully cloaked an object with “perfec... | <urn:uuid:087143ec-8366-4e93-8bc1-dc94bdae37c1> | 2.78125 | 273 | Truncated | Science & Tech. | 31.469859 |
The Scripter’s Journey Series
3. Controlling the FlowTable of Contents
I. The Importance of Program Flow!
II. Conditional Operators!
III. Logical Operators!
IV. Relational Operators!
V. All about Looping!
VI. ConclusionThe Importance of Program Flow!
Program flow is essential. What is program flow you ask? Well, progra... | <urn:uuid:1a923f51-af52-4c6c-b82e-c0df9085e4f4> | 3.953125 | 4,035 | Comment Section | Software Dev. | 60.99064 |
The Latin prefix "infra" means "below" or "beneath." Thus "infrared" refers to the region beyond or beneath the red end of the visible color spectrum. The infrared region is located between the visible and microwave regions of the electromagnetic spectrum. Because heated objects radiate energy in the infrared, it is of... | <urn:uuid:419a23ca-cd84-459f-9163-fced83b11afd> | 3.921875 | 391 | Knowledge Article | Science & Tech. | 53.160421 |
The countries affected by the 2004 Asian tsunami contain the most diverse and extensive coral reefs and mangroves of the Indian Ocean, and some of the richest in the world. Not only are these ecosystems among the most threatened in the world, they also provide numerous essential ecosystem services.
It is thus not surpr... | <urn:uuid:a2f61387-7763-4a36-9dbd-12a83ad6e3e5> | 4 | 1,123 | Content Listing | Science & Tech. | 28.501277 |
We can also compile each C file separately using the cc -c option. This produces an object file with the same name, but ending in .o. After this, the object files are linked using the linker. This would require the four following commands for our current example.
cc -c prog.c cc -c func1.c cc -c func2.c ld prog.o func1... | <urn:uuid:6755327b-07aa-4abc-9e6f-6ec915211efc> | 2.9375 | 210 | Tutorial | Software Dev. | 61.401856 |
Cells and Organelles
There are two main types or categories of cells: prokaryotic cells and eukaryotic cells. Both of these types of cells have several things in common. All cells are surrounded by a plasma membrane, which is made of a double layer (a bilayer) of phospholipids. Within this membrane, is the cytoplasm wh... | <urn:uuid:91ca7c29-06da-42d4-ac66-42ef580fd200> | 4.375 | 1,518 | Knowledge Article | Science & Tech. | 36.764297 |
Take a virtual tour through 400,000 charted galaxies.
No, that isn’t a field of stars. It’s a field of galaxies containing trillions of stars.
The stargazers at the Harvard-Smithsonian Center for Astrophysics have released a huge three-dimensional map of outer space, a core part of its six-year survey of the skies. Enc... | <urn:uuid:3c7f159c-be88-493b-8e03-ed0e371c8529> | 3.421875 | 165 | Personal Blog | Science & Tech. | 57.85622 |
file-position stream => position
file-position stream position-spec => success-p
Arguments and Values:
position-spec---a file position designator.
position---a file position or nil.
success-p---a generalized boolean.
Returns or changes the current position within a stream.
When position-spec is not supplied, file-posit... | <urn:uuid:70cbe893-a3e3-422b-853a-1c8c48573df5> | 2.859375 | 731 | Documentation | Software Dev. | 41.601019 |
Flow Boiling in a Micro-Channel Coated With Carbon Nanotubes
Date of this Version9-2009
This document has been peer-reviewed.
This study examines the heat transfer enhancement attributes of carbon nanotubes (CNTs) applied to the bottom wall of a shallow rectangular micro-channel. Using deionized water as working fluid,... | <urn:uuid:20efa600-af4d-4f98-ad8a-fe3bd76528c2> | 2.796875 | 361 | Academic Writing | Science & Tech. | 29.005163 |
The dictionary effectively defines four tables, the spaces, vendors,
attributes/fields and values tables.
Each table entry contains a number, a name, and a few variables that
define the entry's properties, except for those in the vendors and
values tables, which are simple name/number mappings, nothing more.
A space is... | <urn:uuid:19fc7d91-6567-43b0-ade5-b2b7ca645b55> | 2.96875 | 749 | Documentation | Software Dev. | 33.983392 |
To solve this problem...
Find the missing angle "?":
The angle measure of all the angles of a triangle add up to 180
. See the
angle rule notes
for an explanation of the sum of the angles of a triangle.
Enter your answer:
Your answer may be in any of the following forms:
Decimal (must be accurate to 4 places)
Fraction ... | <urn:uuid:292bc98f-7f59-431f-8ed5-add9bd32db30> | 3.34375 | 140 | Tutorial | Science & Tech. | 86.62451 |
Archive for the ‘xhtml’ tag
Programmers are often required to write HTML code. Recently, on reviewing such code, I found some glaring mistakes. Based on this experience, I have assembled some points which programmers should note when developing HTML.
Version of HTML
Before writing HTML, decide upon version compliance. ... | <urn:uuid:aa61c305-8279-4c34-b082-7b610f823e49> | 2.765625 | 522 | Personal Blog | Software Dev. | 70.391587 |
See also the
Dr. Math FAQ:
Browse High School Puzzles
Stars indicate particularly interesting answers or
good places to begin browsing.
Selected answers to frequently posed puzzles:
Getting across the river.
How many handshakes?
Last one at the table.
Monkeys dividing coconuts.
Squares in a checkerboard.
Weighing a cou... | <urn:uuid:a0032252-c541-427c-8580-08d7fa55cb4a> | 2.90625 | 1,992 | Q&A Forum | Science & Tech. | 73.982928 |
Relativity and Density
Name: Richard S.
If relativity predicts mass increases with velocity and
length decreases in the direction of motion, if you moved an object to a
high enough velocity would its density reached a point at which it would
collapse upon itself and become a black hole?
A person observing it fly by mig... | <urn:uuid:92dbaedc-b06f-480f-997e-25afd0d1cbdb> | 3.375 | 159 | Knowledge Article | Science & Tech. | 43.62641 |
After launch from Kourou, SMART-1 was placed in its initial Earth orbit. This was followed by the commissioning of the spacecraft, including the ion engine. With the engine fully prepared for nominal operations, SMART-1's orbit was boosted by firings of the engine during the thrust arcs.
SMART-1 Earth Bound
Over the ne... | <urn:uuid:6a67b4d5-db6e-45c8-960b-7332fcc817c9> | 3.125 | 566 | Knowledge Article | Science & Tech. | 54.899735 |
Infinite sets [change]
Cardinality is also used for determining the "size" of infinite sets. Although one might first think that all infinite sets are equally large, this is not always true. Infinite sets can be broken down into two types, countable and uncountable.
An infinite set is considered countable if they can b... | <urn:uuid:17745540-1a73-435a-b528-3faaa45de76b> | 3.65625 | 156 | Knowledge Article | Science & Tech. | 44.831251 |
|YPM ICH 8902|
And here is a photo of a bioluminescent midshipman fish specimen:
|Photo taken from this website|
|YPM ICH 8902|
|Image from NOAA|
Another hypothesis is that the photophores function in something known as "counterillumination." This is a form of bioluminescent defense against predators that is used in ma... | <urn:uuid:307e9239-92df-492b-939e-ee0ae708ca4d> | 3.4375 | 833 | Personal Blog | Science & Tech. | 46.335443 |
From issue 2671 of New Scientist magazine
27 August 2008, page 31-33
Find out what the LHC could discover
To get the particles traveling at such energies in a ring requires steering so precise that it can only be provided by intense magnetic fields created by superconducting magnets. These operate without loss of power... | <urn:uuid:c7181306-0e16-4dee-a6b4-b8ebfbe71fb5> | 3.828125 | 916 | Truncated | Science & Tech. | 57.490205 |
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.
There are a few methods that employ foams to achieve separations. In these, the principle of separation is adsorption on gas bubbles or at the gas... | <urn:uuid:ca953c10-6054-4cec-aa08-a3c23307a63c> | 3.921875 | 141 | Knowledge Article | Science & Tech. | 53.061813 |
The Wide-field Infrared Survey Explorer (WISE) is a NASA-funded Explorer mission that will provide a vast storehouse of knowledge about the solar system, the Milky Way, and the Universe. Among the objects WISE will study are asteroids, the coolest and dimmest stars, and the most luminous galaxies.
WISE is an unmanned s... | <urn:uuid:71966554-ccf2-4b4c-83e8-11db1c8561ac> | 4.0625 | 1,071 | Knowledge Article | Science & Tech. | 33.774288 |
Static-cast TypecastStatic casts are only available in C++. Static casts can be used to convert one type into another, but should not be used for to cast away const-ness or to cast between non-pointer and pointer types. Static casts are prefered over C-style casts when they are available because they are both more rest... | <urn:uuid:9adb8181-6f81-467e-b216-998b544cde93> | 3.46875 | 146 | Documentation | Software Dev. | 33.857939 |
long duration balloon in flight
shortly after launch. Click to enlarge.
half of what you see.
by Paul Doherty
December 21, 2001 a long duration balloon was launched near
McMurdo station in Antarctica. A balloon launch is different
from a rocket launch. When the balloon is released it departs
in complete silence. After ... | <urn:uuid:4ee10a5c-b305-4bd8-83ca-6449b422c94d> | 3.59375 | 758 | Nonfiction Writing | Science & Tech. | 66.632584 |
Thinking about Weight and Gravity
The pull of the Earth's gravity keeps us on the ground. The Earth is
massive, so the pull of its gravity is strong.
The Moon is much smaller than the Earth.
Show a friend: What would it be like to move around, if the Earth's gravity
were twice as strong?
The pull of the Earth's gravity... | <urn:uuid:c8bb89f2-4ba4-4347-b73d-78ea91032eee> | 3.296875 | 141 | Tutorial | Science & Tech. | 76.781824 |
Rocky Mountain Research Station Home >
Science Program Areas
> Air, Water and Aquatics >
Stream Temperature Modeling and Monitoring > Spatial Statistical Stream Temperature Model
> Study Overview
Spatial Statistical Stream Temperature Model
Spatial Statistical Stream
Many natural resource agencies routinely collect dig... | <urn:uuid:103f8afa-84be-409f-90af-15fe1f02215a> | 2.859375 | 458 | Knowledge Article | Science & Tech. | 20.885436 |
Algae (singular alga), a name derived from the Latin word for seaweed, are a large and diverse group of photosynthetic, eukaryotic, plant-like organisms that use chlorophyll in capturing light energy, but lack characteristic plant structures such as leaves, roots, flowers, vascular tissue, and seeds. Although they have... | <urn:uuid:aee79017-ad04-4384-bfdf-0e5096b581e1> | 4.15625 | 2,412 | Knowledge Article | Science & Tech. | 31.884286 |
|The Open Door Web Site|
Work, Energy and Power
When a force moves in the direction along which it acts, work is done.
Work is the process of converting energy.
Energy is the ability to do work.
To calculate the work done by a moving force:
the unit of work or energy is the Newton meter or Joule
If the direction of the... | <urn:uuid:098baf24-c7fe-4167-830e-0e24407fe8ae> | 3.828125 | 227 | Tutorial | Science & Tech. | 40.767695 |
Courtesy alvherre at FlickrAcclaimed astrophysicist and author, Stephen Hawking, the former Lucasian Professor of Mathematics at the University of Cambridge - a position once held by Sir Isaac Newton - turns 70 years old today. Stricken with Amyotrophic lateral sclerosis (aka ALS or Lou Gehrig's disease), Hawking has d... | <urn:uuid:46263ed7-c862-4e2b-a567-42f5885412d0> | 2.796875 | 2,285 | Content Listing | Science & Tech. | 41.772343 |
All right. If you’ve understood all the previous Chapter 1 stuff, you are ready to dip your toe into the ocean of glory that is Calculus.
First, let’s go over what you’ve learned:
The essence of this chapter is that there are many types of functions with many different qualities. That’s a little vague, I know, but it’s... | <urn:uuid:ce284544-b920-449c-be4a-425f62015b86> | 2.890625 | 656 | Personal Blog | Science & Tech. | 63.113006 |
The following uses for uranium are gathered from a number of sources as well as from anecdotal comments. I'd be delighted to receive corrections as well as additional referenced uses (please use the feedback mechanism to add uses).
Uranium gives interesting yellow and green colours and fluorescence effects when include... | <urn:uuid:e9997aca-a500-4c9a-a9b3-e4c26cf42ce4> | 2.734375 | 203 | Knowledge Article | Science & Tech. | 31.360201 |
This module defines one class called Popen:
|args, bufsize=0, executable=None, stdin=None, stdout=None, stderr=None, preexec_fn=None, close_fds=False, shell=False, cwd=None, env=None, universal_newlines=False, startupinfo=None, creationflags=0)|
args should be a string, or a sequence of program arguments. The program t... | <urn:uuid:cce85cd7-4f7e-407d-8ce7-f6d5f90e31c2> | 3.421875 | 940 | Documentation | Software Dev. | 43.697099 |
Science Fair Project Encyclopedia
14 in two suborders, see text. The octopus is a cephalopod of the order Octopoda that inhabits many diverse regions of the ocean, especially coral reefs. The term may also refer to only those creatures in the genus Octopus . In the larger sense, there are 289 different octopus species,... | <urn:uuid:0cbceaac-aa1b-492c-89db-a6615a553de2> | 4.21875 | 2,109 | Knowledge Article | Science & Tech. | 33.782776 |
Desolvation, in biochemistry, is the process where in an aqueous solution containing an enzyme and a substrate, water that is surrounding the substrate is replaced by the enzyme. In other words, water molecules that were once in between the substrate and the enzyme are displaced to allow the interaction of the substrat... | <urn:uuid:deb15a0e-e34e-46af-a708-38611b4d6ca9> | 3.671875 | 163 | Knowledge Article | Science & Tech. | 22.038846 |
In fluid mechanics, displacement occurs when an object is immersed in a fluid, pushing it out of the way and taking its place. The volume of the fluid displaced can then be measured, and from this the volume of the immersed object can be deduced (the volume of the immersed object will be exactly equal to the volume of ... | <urn:uuid:cb704912-c5cd-4470-893f-c3500d1df910> | 4.28125 | 469 | Knowledge Article | Science & Tech. | 54.045302 |
Stomolophus meleagris Agssiz, 1862
Dome-shaped bell can be up to 25 cm (10 inches) in diameter.
Ecology and Distribution
'Stomolophus is usually described as the most abundant scyphozoan in the Gulf, particularly in the late summer and fall when it 'swarms' around inlet passes.' (Rountree 1983)
'The scyphozoan Stomolop... | <urn:uuid:0a7dd8e5-8d8d-478e-bb96-27b4ce5692a9> | 3.25 | 528 | Knowledge Article | Science & Tech. | 38.89945 |
ADO Fundamentals, and the HelloData example in particular, introduced the four primary operations involved in creating an ADO application: getting data, examining data, editing data, and updating data. This section discusses getting data in more detail.
On a basic level, several ADO objects contribute to the operations... | <urn:uuid:4872f26f-875a-4a80-be75-61abe324d39a> | 3.03125 | 120 | Documentation | Software Dev. | 25.969355 |
4.4. X-rays from AGN
One June 18, 1962, an Aerobee sounding rockets blasted skyward from White Sands proving ground in New Mexico. It carried a Geiger counter designed to detect astronomical sources of X-rays. The experiment, carried out by Giacconi et al. (1962), discovered an X-ray background and a "large peak" in a ... | <urn:uuid:c1f6423b-7a22-44a0-b5b0-3ae1f45258a5> | 3.5625 | 1,039 | Academic Writing | Science & Tech. | 66.374537 |
I always see pictures of the solar system where our sun is in the middle and the planets surround the sun. All these planets move on orbits on the same layer. Why?
We haven't ironed out all the details about how planets form, but they almost certainly form from a disk of material around a young star. Because the disk l... | <urn:uuid:a69ff38b-3300-4399-996b-f7995a04be43> | 3.5 | 221 | Q&A Forum | Science & Tech. | 69.455 |
It is well known that if you blow horizontally on a bottle top it creates a sound. Pouring water to the bottle changes the pitch. I have been doing experiments on the relation between the sound's ...
I play the flute as a hobby, and I've noticed that when playing middle D or E flat, one can interrupt the air column by ... | <urn:uuid:d3e3e27b-19dc-46eb-9ffe-17d7ad8839df> | 3.3125 | 196 | Q&A Forum | Science & Tech. | 73.521053 |
Emperor Has No Clothes Pt. 2
Newport Beach at Sunset in 2007, the day someone argued to the National Research Council that "dark energy" would be very bad for science. Along with a changing speed of light, another prediction has come true.
The term "dark energy" has started to slowly fade. Yesterday August 13 a decadal... | <urn:uuid:09758bcf-0006-41d1-9f46-95eb1dda0f5f> | 2.6875 | 605 | Personal Blog | Science & Tech. | 61.423006 |
First Look at HadCRUT4
Posted on 18 April 2012 by dana1981
Morice et al. (2012) explains the changes in HadCRUT4, which incorporates land temperatures from CRUTEM4 (as described by Jones et al. 2012) and sea surface temperatures (SSTs) from HadSST3 (as described by Kennedy et al. 2011 Part 1 and Part 2).
CRUTEM4 has be... | <urn:uuid:29040e95-4bf0-4162-8267-f88fcb87bc90> | 3.046875 | 942 | Personal Blog | Science & Tech. | 57.705201 |
open(), lseek() to the end of file, getting the size of file using tell(), and then allocating memory accordingly would work well as suggested above.
Unless there is specific reason to do it, fopen(), fseek(), ftell() is a better idea (portable staying within the C standard library).
This certainly assumes that the fil... | <urn:uuid:36ab3a53-9019-42fd-8803-3a5ca3d82fab> | 2.78125 | 223 | Q&A Forum | Software Dev. | 48.911451 |
Evolution in a nutshell
By AMY ADAMS
The HMS Beagle launched on its second survey expedition from England’s Devenport Harbor on Dec. 27, 1831, with a crew of 73. Charles Darwin, a 22-year-old gentleman with a penchant for collecting beetles, was aboard to serve as naturalist. Though the trip was planned to last two yea... | <urn:uuid:d92e6ba8-ef4f-4b11-a109-90f42daf9f36> | 3.984375 | 1,022 | Nonfiction Writing | Science & Tech. | 38.043825 |
When Louis de Broglie proposed in 1924 that the wave-particle duality applies not only to photons but also to electrons, he forged a metaphoric link that has had profound effects on the way we understand the physical world. De Broglie's insight, which suggested that electrons might be better understood if they were tre... | <urn:uuid:c05eb18a-6eb0-498e-9a1f-88b6c349ebe6> | 3.625 | 1,367 | Knowledge Article | Science & Tech. | 28.893656 |
|Horseshoe Crab Home | Education Home | Fisheries Home | DNR Home|
SPECIES OF LIMULUS|
At one time, there were many species of horseshoe crabs, however, only four have survived. Three of these can be found along the shores of Southeast Asia and nearby islands. The fourth species, Limulus polyphemus, is found in the wat... | <urn:uuid:11b62d2d-989b-4cb9-b5e6-fd49869bc221> | 3.71875 | 417 | Knowledge Article | Science & Tech. | 21.525286 |
toadstool: see mushroom.
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.
More on toadstool from Fact Monster:
- mushroom - mushroom mushroom, type of basidium fungus characterized by spore-bearing gills on the underside of ...
- FUNGI - Neither plants nor ... | <urn:uuid:38ecc236-19ed-4dff-b97d-f11a017d1f77> | 3.234375 | 206 | Knowledge Article | Science & Tech. | 39.851857 |
It’s like the northern lights – just 100 times more awesome…
Also called ‘zodiacal light’, what causes this glow that can light up the night sky?
Watch the first rocket-powered flight of Virgin Galactic’s SpaceShipTwo
Take a look at the spacecraft that carried the first person into space
The remnants of stars have core... | <urn:uuid:866226b4-1c1e-47d6-808c-b78e6136f598> | 3.28125 | 344 | Content Listing | Science & Tech. | 49.846522 |
Today Second Life took us all the way to London to learn about how the Sun affects the Earth. We talked to Dr. Joanna Haigh, a scientist who studies how changes in the sun may affect Earth’s climate. The Sun even appeared in the auditorium during the talk!
The Sun takes part in Dr. Joanna Haigh’s talk in Second Life
No... | <urn:uuid:f5c8cf83-3eba-48ae-bf01-0b1763b7bd1d> | 3.125 | 1,458 | Personal Blog | Science & Tech. | 51.514545 |
DEQ has identified stream temperature as one of the water quality standards that is not being met for streams in both eastern and western Oregon. Furthermore, the Oregon Plan identifies the need for action plans that will support recovery of water quality. This Best Management Practices (BMP) monitoring project support... | <urn:uuid:fc186f1a-0c5b-415f-8d70-8208e9c426b9> | 3.03125 | 206 | Knowledge Article | Science & Tech. | 34.28431 |
More Than Meets the Eye: Invisible propane gas flows, unlit, from a torch. On hitting the rhodium-studded ceramic honeycomb from a catalytic converter, it burns without flame, heating the ceramic red-hot. Mike Walker
To a chemist, burning means the rapid combination of a fuel with oxygen, called oxidation. You might sa... | <urn:uuid:add16809-6008-4332-8450-8306196c934f> | 3.046875 | 131 | Content Listing | Science & Tech. | 47.370351 |
As milestones go, this could be seen as a small one. After all, China merely performed a feat that Americans achieved more than 45 years earlier (and its space station is about the size of the Salyut 1 Russia flew about 40 years ago). There was a key difference, though: While the first American docking was with a manne... | <urn:uuid:b4c00285-56ff-4f5e-bdd0-59c3306cc29b> | 3.375 | 1,213 | Nonfiction Writing | Science & Tech. | 44.148502 |
By February 3, Orbiter had broken the flight duration record of 146 hours and 44 minutes set by Fossett during his first around-the world attempt from St. Louis in January 1997, which ended in Pakistan--although not his distance record of 10,360 miles. But the remainder of the flight was in question. China had refused ... | <urn:uuid:5474e043-80ca-465f-8ef8-3fe9e206fe51> | 3.78125 | 782 | Knowledge Article | Science & Tech. | 47.398134 |
|Fracking can cause earthquakes, but oil and gas extraction may cause more||
Furthermore, the greatest risk of earthquakes due to fracking does not come from drilling into deep shale or cracking it with pressurized water and chemicals.
Rather, it comes from pumping the wastewater from those operations back down into de... | <urn:uuid:dbdcf276-6563-4e0a-9177-2ebeac393cc7> | 3.375 | 676 | Truncated | Science & Tech. | 27.399326 |
Write comments between coding
It is very important comments writing in html coding to read and understand coding. because, if page need changes, It can help to edit coding next time.
Keep good coding structure
Write code with good structure as shown below, It can also understandable to read coding. if it does not appea... | <urn:uuid:4ea330ba-7a0a-4e88-a025-cb1eef5fc424> | 3.3125 | 276 | Tutorial | Software Dev. | 57.393684 |
Al Gore says global warming is a planetary emergency. It is difficult to see how this can be so when record low temperatures are being set all over the world. In 2007, hundreds of people died, not from global warming, but from cold weather hazards.
Since the mid-19th century, the mean global temperature has increased b... | <urn:uuid:62b24326-c067-493b-8705-742bbaaf3ac9> | 3.375 | 1,023 | Nonfiction Writing | Science & Tech. | 51.957645 |
As you go higher in the mesosphere, the air gets colder.
Click on image for full size
Original artwork by Windows to the Universe staff (Randy Russell).
Temperature in the Mesosphere
The top of the mesosphere is the coldest part of the atmosphere. It can get down to -90° C (-130° F) there! As you go higher in the mesos... | <urn:uuid:d2e5ca01-585c-49d4-a5ee-e87a266e3a56> | 3.96875 | 538 | Content Listing | Science & Tech. | 55.405959 |
How Sodium Polyacrylate Absorbs
Superabsorbent polymers are partially neutralized polyacrylate, with incomplete cross-linking between units. Only 50–70% of the COOH acid groups have been converted to their sodium salts. The final chemical has very long carbon chains bonded with sodium atoms in the center of the molecul... | <urn:uuid:58af78fc-4ffc-45d2-87f7-014ee4cb5ddb> | 3.453125 | 324 | Knowledge Article | Science & Tech. | 36.822143 |
DistributionRead full entry
Range DescriptionThe Hog Deer historically occurred from Pakistan, throughout northern and northeastern India, including the Himalayan foothill zone, east across non-Sundaic Southeast Asia and, marginally, southern China (southern Yunnan province), but is now reduced to isolated populations ... | <urn:uuid:4b820538-9467-43d9-bd0f-ca24c9fa9965> | 2.953125 | 337 | Knowledge Article | Science & Tech. | 59.777625 |
A centroid of a triangle is the point where the three medians of the triangle meet. A median of a triangle is a line segment from one vertex to the mid point on the opposite side of the triangle.
The centroid is also called the center of gravity of the triangle. If you have a triangle plate, try to balance the plate on... | <urn:uuid:1b43acab-1594-4a83-a0de-fcf88d1a1c1e> | 4.125 | 756 | Academic Writing | Science & Tech. | 72.933919 |
Single neurons can detect sequences?
ScienceDaily tells us that
If this holds up, it might help explain how some people (not all, of course) have come back from serious brain injuries, even at an advanced age, when neuron production may be low.
Single Neurons Can Detect Sequences
ScienceDaily (Aug. 13, 2010) — Single n... | <urn:uuid:17a4df07-4ced-4668-84af-178aea6dbbbd> | 2.953125 | 203 | Personal Blog | Science & Tech. | 25.374444 |
This Topic deals with the occurrence of marine invertebrates in Nova Scotia waters, The marine environment includes the diverse intertidal habitats (H2.1 - H2.5), the ocean bottom (H1.2) and water of the open sea (H1.1). Common species are included in the habitat descriptions.
The Canadian Atlantic marine fauna is gene... | <urn:uuid:0fc50830-9ec1-4826-8ec2-50aef8dab870> | 3.203125 | 312 | Truncated | Science & Tech. | 38.136228 |
HTML Tag: Symbols used to define the structure and formatting of an HTML document. This includes the structure of the document with <head> and <body> tags, layout of the document with tags like <table> or <div> and formatting of text with tags like <b> for bold and <i> for italic. Tags have a starting form like <this> ... | <urn:uuid:0164e078-2d15-4ae7-82a2-23744e73f5c8> | 3.8125 | 159 | Knowledge Article | Software Dev. | 52.225719 |
Feb. 20, 2009
NASA's Fermi Gamma-ray Space Telescope has detected a record-setting gamma-ray burst with the greatest total energy and fastest motions ever seen.
Feb. 20, 2009
Are there other worlds like ours? Are we alone? NASA's Kepler spacecraft is about to begin an unprecedented journey that could answer these ancie... | <urn:uuid:6d08dca5-2743-486b-b73f-e996155b74e2> | 2.921875 | 477 | Content Listing | Science & Tech. | 62.656616 |
by G Lyon
Name_______________________ Date___________ Per.______
This is a laboratory that simulates a population census technique commonly used by
wildlife biologists in the field. The first step is to trap a random sample of animals
of the desired species. These animals are then ear-tagged or marked in some other
man... | <urn:uuid:8dc5f43b-d6c4-45bf-abf2-0987221f9dde> | 3.609375 | 428 | Tutorial | Science & Tech. | 61.956227 |
Kempner has established the existence of a basis for residual polynomials in one variable with respect to a composite modulus. A residual polynomial modulo m is by definition a polynomial f(x) with integer coefficients which is divisible by m for every integral value of x, and a residual congruence is written f(x) = 0 ... | <urn:uuid:e5760ebe-416c-4e68-b998-9017b42962fa> | 2.796875 | 750 | Academic Writing | Science & Tech. | 77.518011 |
Ground States Of A Collection Of N Point-Like Particles
Ground states of a collection of N point-like particles constrained to lie on the surface of a torus and interacting via a cubic potential. The lattices are labeled by (r,N), where r is the ratio between the largest and smallest radius of the torus. The figure sho... | <urn:uuid:7cafbd7f-f4a1-4d64-9225-00680a1b9ced> | 2.875 | 230 | Knowledge Article | Science & Tech. | 61.4 |
What is it?
It was found at the bottom of the sea aboard an ancient Greek ship.
Its seeming complexity has prompted decades of study,
although some of its functions remained unknown.
X-ray images of the device have confirmed the nature of the
and discovered several surprising functions.
The Antikythera mechanism has be... | <urn:uuid:2fbd0c5e-8696-47ae-8258-86b101f5035a> | 3.90625 | 164 | Knowledge Article | Science & Tech. | 41.464219 |
|What happens when a star runs out of
For stars about the mass of our Sun, the center condenses into a
while the outer atmospheric layers are
expelled into space and appear as a
pictured above and designated
Shapley 1 after the famous astronomer
Harlow Shapley, has a very apparent annular ring like structure.
Although ... | <urn:uuid:121b62c6-de8a-4dc4-98c6-b32d49992ef1> | 3.4375 | 102 | Content Listing | Science & Tech. | 24.3885 |
Space Environment Center -- The official U.S. government bureau
for real-time monitoring of solar and geophysical events, research
in solar-terrestrial physics, and forecasting solar and geophysical
Optics -- the first place to look for information about sundogs,
pillars, rainbows and related phenomena. See also Snow
S... | <urn:uuid:1f3a42f6-57fc-4b0b-9559-6c58c2d4deb4> | 2.796875 | 516 | Content Listing | Science & Tech. | 32.644623 |
“Researchers at the Scripps Research Institute have made important steps toward understanding how life originated by shedding light on the ‘RNA World’ hypothesis. The ‘RNA World’ refers to the idea that life on Earth went through a stage where RNA was used to store information and act as a catalyst, much like DNA and p... | <urn:uuid:8745cae7-72a0-402d-829c-62a0b1ad401f> | 3.375 | 250 | Personal Blog | Science & Tech. | 52.667725 |
Q&A: Dark Matter
Regarding the Dark Matter Mystery. Did the equation for the mass
of the galaxy include planetary zones for the stars? Just
looking at our own solar system, a large proportion of the mass
seems to be in the planetary zone and made up of elements with
much greater mass than just hydrogen. Also these plan... | <urn:uuid:418efe5c-58b5-4c50-a75e-c9cd29fe2783> | 2.84375 | 159 | Q&A Forum | Science & Tech. | 59.026059 |
Actinopterygii (ray-finned fishes) > Perciformes
(Perch-likes) > Pomacentridae
(Damselfishes) > Pomacentrinae
Etymology: Pomacentrus: Greek, poma, -atos = cover, operculum + Greek, kentron = sting (Ref. 45335). More on author: Jordan, Seale.
Environment / Climate / Range
Marine; reef-associated; non-migratory; depth ra... | <urn:uuid:303f7f5b-d7d0-4126-b917-b5e7bd19c4c0> | 2.734375 | 625 | Knowledge Article | Science & Tech. | 65.635439 |
Scientists at Harvard University have created a cyborg tissue consisting of lab-grown flesh embedded with nano-wires that has the same "sensing" properties as human skin. This is all going to end very poorly. Probably with an army of cyborgs that look human.
'Ultimately, this is about merging tissue with electronics in... | <urn:uuid:a1e3ce23-2c2b-4505-ad1b-e3d817d906f9> | 2.890625 | 279 | Personal Blog | Science & Tech. | 55.411692 |
Video: Volcanic vents
At this depth, the spewing water is hot enough to melt lead, and the pressure it exerts means that every square centimetre has to withstand the weight of five hefty men.
"It was like wandering across the surface of another world," says Bramley Murton, a geologist at the National Oceanographic Cent... | <urn:uuid:c38b2385-898a-4df4-ae23-67e20f78d28b> | 3.3125 | 838 | Truncated | Science & Tech. | 61.70007 |
Determining Distance to Object, Retina Image
Date: Fall 2011
What is the formula for determining the distance away an object is, given the apparent size versus the actual size? For example, an airplane flying overhead. I live near an airport and curiosity got me thinking about this. It might be one inch to my retina ve... | <urn:uuid:cef3216d-7950-4cad-a845-bc20bcf269ec> | 3.859375 | 1,205 | Knowledge Article | Science & Tech. | 70.00861 |
Freezing Water and Life
water is the only compound I know that expands while
freezing. Why is it essential that it does to guarantee our survival?
What are all the reasons why we would perish if this property was
absent of water?
ALL the reasons? You're not paying us enough.
ONE big reason is that if ice sank, the ocea... | <urn:uuid:dc586c2a-eac7-4638-bae6-c7e1ad241cd3> | 2.90625 | 220 | Personal Blog | Science & Tech. | 67.211528 |
A new visual illusion is predicted from the assumption that the perceived distance along any path depends on the discriminability for position along the path. A disk is placed between two dots, so that the straight path between the dots is nearly tangent to the disk. It is predicted that, for the perceived straight pat... | <urn:uuid:55e649a9-b6c6-461a-987f-fc9e2fd3d86f> | 2.890625 | 170 | Academic Writing | Science & Tech. | 58.439419 |
HTTP has a very thorough and well supported caching mechanism, but in this age of the dynamic Web page, it often goes unused when it is needed the most. So what do we, as Web programmers, need to do to make sure our pages are cached correctly? Let's have a look.
What is the point of caching? The idea is that on the Web... | <urn:uuid:65bf77f5-d0e3-4b20-adf1-bcffb9e3e884> | 3.125 | 1,239 | Documentation | Software Dev. | 48.888557 |
Discrete Fourier seriesAssume we are given a periodic discrete-time signal x with period p. Just as with continuous-time signals, this signal can be described as a sum of sinusoids,
x(n) = A0 + ∑(k=1 to (p-1)/2) Ak cos (kω0n + φ k )
for p odd and
x(n) = A0 + ∑(k=1 to p/2) Ak cos (kω0n + φ k )
for p even, where ω0 = 2 π... | <urn:uuid:ac29348e-f774-4d4e-bd01-2d7182512e51> | 3.59375 | 382 | Academic Writing | Science & Tech. | 48.309539 |
what is the difference between enum and final class in java?
The java.lang.Enum is an abstract class, it is the common base class of all Java language enumeration types. The definition of Enum is:
public abstract class Enum> extends Object implements Comparable, Serializable
All enum types implicitly extend java.lang.E... | <urn:uuid:3ff163e3-320c-48be-9a3c-c4ec2baf0dec> | 3.3125 | 100 | Q&A Forum | Software Dev. | 43.840667 |
Redoubt Volcano erupted for 3 months in 2009, generating spectacular ash clouds and producing a large lava dome that remains in place today. Both this eruption and the last eruption in 1989 were preceded by bursts of earthquake activity -- known as earthquake swarms-- that provided scientists with early warning of the ... | <urn:uuid:acb464c3-afa4-49ac-b9f7-0295409942cc> | 3.890625 | 269 | Knowledge Article | Science & Tech. | 23.657541 |
Galls are something you can be forgiven for overlooking, but they’re an important and surprisingly common feature of the natural world. In fact, gall expert Ron Russo has found as many as 30 species of galls on a single blue oak, and even casual observers may run across giant ones nicknamed “oak apples” that are formed... | <urn:uuid:7ee156b8-3d73-4f3f-9e91-32cb60a0b112> | 3.875 | 702 | Personal Blog | Science & Tech. | 41.663396 |
NGC 281 in 60 Seconds
Narrator (April Hobart, CXC): High-mass stars are important because they are responsible for much of the energy pumped into a galaxy over its lifetime. Unfortunately, these stars aren’t understood very well because they are usually found relatively far away in places where lots of gas and dust can... | <urn:uuid:42882447-cdec-42bf-aa4a-d888696da747> | 3.84375 | 234 | Truncated | Science & Tech. | 58.063588 |
One very important design principle I came across years ago was something called MVC; Model View Controller. Essentially what that entails is instead of bunging all your PHP code (and MVC does not only refer to PHP, its a design concept used in lots of other languages) into one file to represent a page, like database c... | <urn:uuid:5a3e16e3-0f69-4013-81e1-ebc5d161e775> | 2.953125 | 900 | Personal Blog | Software Dev. | 43.193979 |
An estimation of the galaxy's span resulted in a conclusion of 150,000 light years, which is slightly larger than the Milky Way.
The Cartwheel galaxy shows non-thermal radio and optical spokes, but they are not the same spokes.
The galaxy was once a normal spiral galaxy like the Milky Way before it apparently underwent... | <urn:uuid:d1b0d9bd-c9e6-4e70-b7f9-87f1f1e854c8> | 3.734375 | 162 | Truncated | Science & Tech. | 58.044235 |
- FAMILIES OF DECEASED SEAL TEAM 6 MEMBERS ARE MAKING SERIOUS ALLEGATIONS AGAINST THE GOVERNMENTPosted 10 days ago
- European Commission to Criminalize Nearly all Seeds and Plants not Registered with GovernmentPosted 11 days ago
- After the Tragedy in Boston, More Government Surveillance is Not the AnswerPosted 12 days... | <urn:uuid:170f5ab6-6dfe-4ded-b104-c5b8ef4da7bd> | 2.953125 | 750 | Listicle | Science & Tech. | 33.535543 |
Department of Physics and Astronomy
Points of Emphasis
The purpose of this lab is to introduce the students to a number of electric and magnetic phenomena which they will be studying in depth throughout the term. The standard version consists of six lab stations.
Station 1: Electrostatics
This section demonstrates a nu... | <urn:uuid:8d9ab527-370c-42ea-ad9c-3bbbae198bfa> | 3.8125 | 725 | Tutorial | Science & Tech. | 40.787712 |
Scarlet Kingsnakes (milk snakes) can thrive in a variety of habitats. They are usually found around coniferous or deciduous forest edges, but they can also be found in tropical hardwood forests, open woodland, dry or wet prairies, savannahs, rocky hillsides, small streams or marshes, and agricultural or urban areas. Th... | <urn:uuid:8134ef70-1e4e-4adf-9607-b884732a83be> | 3.09375 | 173 | Knowledge Article | Science & Tech. | 46.884231 |
Introduction to Apache Ant
The Apache Ant package is a
Java-based build tool. In theory,
it is kind of like make, but without make's wrinkles. Ant is different. Instead of a model that is
extended with shell-based commands, Ant is extended using Java classes. Instead of writing shell
commands, the configuration files a... | <urn:uuid:3c0f2bf8-24ee-474c-a777-2272980cb93e> | 3.4375 | 647 | Documentation | Software Dev. | 70.751674 |
New research from a global group of scientists and engineers, including from the University of Southampton, supports the use of tidal power, which has the potential to provide more than 20 per cent of the UK's electricity demand.
NASA scientists say 2012 was the ninth warmest of any year since 1880, continuing a long-t... | <urn:uuid:824031f7-aefa-48f3-9fb3-9d6fe891be1c> | 2.921875 | 464 | Content Listing | Science & Tech. | 31.561908 |
How to Find Life: When starlight passes through a planet’s atmosphere, certain elements absorb specific wavelengths of light, and these show up as dips in the spectrum. McKibillo
If aliens are out there, the best shot at finding them—assuming they resemble the life-forms on Earth—is to look for planets like ours. E.T.’... | <urn:uuid:aedd4ac7-1b2d-43bb-9dbd-b6af8e1ee233> | 3.171875 | 127 | Truncated | Science & Tech. | 48.137047 |
Richard F. Holman is a professor of physics at Carnegie Mellon University. He offers this response:
Wormholes are solutions to the Einstein field equations for gravity that act as "tunnels," connecting points in space-time in such a way that the trip between the points through the wormhole could take much less time tha... | <urn:uuid:572c582e-ad57-482d-9ef6-e15877cc37a2> | 3.28125 | 837 | Comment Section | Science & Tech. | 34.257267 |
The Doppler effect (or Doppler shift), named after Austrian physicist Christian Doppler who proposed it in 1842, is the change in frequency of a wave for an observer moving relative to the source of the wave. It is commonly heard when a vehicle sounding a siren or horn approaches, passes, and recedes from an observer. ... | <urn:uuid:1f8e58a0-f975-4fdd-883a-345895336f57> | 4.3125 | 2,923 | Knowledge Article | Science & Tech. | 33.474732 |
Increase In Fresh Water Flowing Into Arctic Ocean Could Threaten Gulf Stream
The effect of the Gulf Steam slowing or stopping on weather across Europe is a familiar theme in talking about the future impact of climate change--the climate there would become decidedly colder if that happened. And it seems that current lev... | <urn:uuid:471b2579-d90f-4616-8cc1-366da8dd3fc0> | 3.265625 | 215 | Truncated | Science & Tech. | 29.923533 |