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Basics of Spectrophotometry
Many compounds absorb light, but not all absorb the same amount, or the same colors (wavelength). Some absorb mainly in the visible spectrum (see below) while others absorb mainly in the ultraviolet or infrared range. Here we are mainly interested in measuring absorbance in the visible range... | <urn:uuid:ccc47f3b-e67e-43e8-823e-67f2be0c81ef> | 4.1875 | 529 | Tutorial | Science & Tech. | 42.011992 |
Node:Number Syntax, Next:Integer Operations, Previous:Exactness, Up:Numbers
The read syntax for integers is a string of digits, optionally preceded by a minus or plus character, a code indicating the base in which the integer is encoded, and a code indicating whether the number is exact or inexact. The supported base c... | <urn:uuid:a0c910df-47e7-4179-812f-02170b62b340> | 3.875 | 332 | Documentation | Software Dev. | 37.512011 |
© Kamioka Observatory, ICRR (Institute for Cosmic Ray Research), The University of Tokyo.
This photograph shows the almost full water tank at the Super-Kamiokande nucleon decay experiment. The experiment, buried deep underground, seeks evidence of proton decay. A decaying proton will emit one or more charged particles,... | <urn:uuid:e9082641-38de-4976-ae5e-2b21e5761db5> | 3.921875 | 148 | Knowledge Article | Science & Tech. | 23.030692 |
Wild Side : Soltice — the invisible annual pivot point
Photo by Susan Safford
This winter solstice, the official start of winter, was emphatically punctuated by a total eclipse of the moon early Tuesday morning (the actual solstice occurred Tuesday evening).
When this column was filed Monday morning, the prospect of go... | <urn:uuid:693bc737-c300-4559-8700-edf286c7cf69> | 3.265625 | 1,019 | Truncated | Science & Tech. | 42.753345 |
The watch list however, is different from the emerging contaminants action list. The watch list includes those materials that DoD believes have a "probable mission or budge impact." DoD then monitors events surrounding the listed material while conducting "rough impact analysis." Other materials found on the watch list... | <urn:uuid:d54d9892-b016-430a-b63e-55ff5f372982> | 2.84375 | 479 | Knowledge Article | Science & Tech. | 24.076276 |
Researchers around the world are opening their minds to the possibility that the phenomenon of anti-gravity is not just science fiction.
Most respected physicists still scoff at the idea that experimental equipment can reduce gravity, but several groups have been working on it independently and are coming to the same c... | <urn:uuid:02910fb1-b743-4022-a7e6-e9276ba52c43> | 3.28125 | 1,356 | Comment Section | Science & Tech. | 43.435024 |
BIRDS appear to be social climbers. Our feathered friends have expensive tastes when it comes to deciding where to hang out, preferring parks in more upmarket neighbourhoods over the poorer parts of town.
The British government already uses local bird life as one of 15 indicators of the quality of life - the others are... | <urn:uuid:7ed36544-542f-4ded-a112-9f289cd16584> | 3.125 | 202 | Truncated | Science & Tech. | 45.366452 |
Many species undergo extensive diel vertical migration, feeding in the surface waters and moving down during the day, reducing predation. In this way, surface production is cascaded through progressively deeper layers. Of relatively minor productive importance is organic material from large carcasses sinking to the sea... | <urn:uuid:23c6c7bf-263c-4a8a-8bfd-4d08647112ba> | 4.375 | 1,664 | Knowledge Article | Science & Tech. | 25.912833 |
In most cases it's simpler to perform date calculations using epoch time (the numbers of seconds that have elapsed since a given date, in Unix is January 1, 1970).
If you have a date and want to convert it to epoch time, use the functions timelocal and timegm availabe in the module Time::Local.
These functions take as ... | <urn:uuid:3c384e4d-2eaa-48a3-8301-f31c04c863dc> | 2.875 | 653 | Tutorial | Software Dev. | 52.637154 |
The waves so far discussed can be:
(a) Transverse waves
(b) Longitudinal waves.
(a) Transverse waves:
The waves in which each particle of the medium executes vibrations about its mean position and is perpendicular to the direction of the waves are called transverse waves. For example, the waves generated in a pond when... | <urn:uuid:f952c2f3-3cf7-4926-b816-0038f15512fe> | 4.34375 | 283 | Knowledge Article | Science & Tech. | 31.915469 |
A worldwide effort is underway to perform a census of the world's oceans, pulling information about species from around the world into one location. The project, known as the Census of Marine Life, now has 122,500 different species on its tally -- after cleaning up over 56,000 scientific names that were in actuality ju... | <urn:uuid:22e16b87-e8db-4ad0-b310-7b654054a9c2> | 3.71875 | 211 | Truncated | Science & Tech. | 32.10373 |
The term, 12th Planet, is not scientifically exact but relates to the historical and widely read book that Sitchen wrote, titled The 12th Planet. In this book he explains that the ancient visitors from this traveling comet considered the Moon to be a planet, and counted the Sun as the first. The periodic Earth cataclys... | <urn:uuid:700c40e0-ac87-4e3b-971e-6eaf70376f89> | 3.84375 | 469 | Nonfiction Writing | Science & Tech. | 58.06146 |
This activity was selected for the On the Cutting Edge Reviewed Teaching Collection
This activity has received positive reviews in a peer review process involving five review categories. The five categories included in the process are
- Scientific Accuracy
- Alignment of Learning Goals, Activities, and Assessments
- Pe... | <urn:uuid:20d078a0-47a3-413c-adbb-d96ba299ddd2> | 3.5625 | 915 | Knowledge Article | Science & Tech. | 30.245258 |
Nanotechnology: Cleaning up our Water
Reported April 2008
HOUSTON, Texas (Ivanhoe Newswire) -- He's just 37 years old, but he's already making a difference in the world! Now, Ivanhoe introduces a young engineer who's creating small solutions to big problems.
We've seen it in the movies -- polluted drinking water is a h... | <urn:uuid:4b935059-83cf-4ae9-b0a7-01c10d20d567> | 2.9375 | 1,087 | Truncated | Science & Tech. | 63.529994 |
The simplest explanation is to consider a tray with a bunch of small depressions in it and a bunch of marbles on it. When the tray is stationary, the marbles fall in to the depressions and stay there. When you shake the tray very slowly, the marbles stay in their depressions. But if you shake the tray vigorously, the m... | <urn:uuid:855a7cf5-2fee-4a4d-8d11-d272b90c91ee> | 2.875 | 706 | Q&A Forum | Science & Tech. | 40.776222 |
The size and number of marine dead zones—areas where the deep water is so low in dissolved oxygen that sea creatures can’t survive—have grown explosively in the past half-century. Red circles on this map show the location and size of many of our planet’s dead zones. Black dots show where dead zones have been observed, ... | <urn:uuid:71de7202-1891-4a5a-bd5c-f404128fefc1> | 4 | 321 | Knowledge Article | Science & Tech. | 37.045344 |
You're hot or you're not
Hot and cold are two of the most basic things we come across in life - but only one of them actually exists.
You don't have to live in Australia to know that heat is real. It's pure energy, and when you heat things up, you're just adding energy to them.
But there's no such thing as cold: cold i... | <urn:uuid:833e2bc5-2838-4f49-95a0-0baf7403a28b> | 2.9375 | 1,193 | Truncated | Science & Tech. | 59.467819 |
Posts Tagged «solar power»
Stanford creates flexible, high-efficiency peel-and-stick solar cells December 24, 2012 at 8:48 am
Researchers at Stanford University have created the first peel-and-stick solar cells. These cells are flexible, can be attached to a variety of surfaces (windows, business cards, clothing), and ... | <urn:uuid:4ceade83-5fc9-4937-82ce-1b0bff67f47d> | 2.90625 | 832 | Content Listing | Science & Tech. | 36.5548 |
The Extensible Provisioning Protocol (EPP) is a flexible protocol designed for allocating objects within registries over the Internet. The motivation for the creation of EPP was to create a robust and flexible protocol that could provide communication between domain name registries and domain name registrars.
These tra... | <urn:uuid:14f29fc3-a4db-4066-9f10-9d8667112d7e> | 2.984375 | 199 | Personal Blog | Software Dev. | 22.491055 |
With the invention of the iPad and driverless cars, technology has begun mimicking the images of old “futuristic” sci-fi films. Now our future may hold some inventions influenced by “magical” films, such as the Harry Potter series. BBC News reports:
Scientists in the UK have demonstrated a flexible film that represents... | <urn:uuid:39f692cd-86d2-4d63-a92a-08cc0fe402c7> | 3.375 | 266 | Truncated | Science & Tech. | 40.372564 |
When an error occurs, the interpreter prints an error message and a stack trace. In interactive mode, it then returns to the primary prompt; when input came from a file, it exits with a nonzero exit status after printing the stack trace. (Exceptions handled by an except clause in a try statement are not errors in this ... | <urn:uuid:90940c7a-8327-4ef1-92a5-1d7655a4ef69> | 3.21875 | 180 | Documentation | Software Dev. | 39.766941 |
These days anyone can contribute to a great scientific endeavour, whether it’s astronomy, molecular biology or sleep research. Clare Freeman investigates the growing importance of citizen scientists and crowdsourced research.
In this week’s show we delve into the world of crowdsourced science to find out why scientists... | <urn:uuid:59206f63-27c4-4030-af67-4606d3612991> | 2.890625 | 278 | Content Listing | Science & Tech. | 36.624715 |
- Oil Pollution Facts
- Marine Debris Facts
Photo Credit: US Department of Justice
Source: American Academy of Sciences,
Oil in the Sea III, 2003
According to the National Academy of Sciences the majority of the oil in the ocean, about fifty-two percent, is the direct result of human activity. The remaining forty-eight... | <urn:uuid:9813e9a5-a4cb-4f67-879d-a7dd10723dba> | 3.78125 | 459 | Knowledge Article | Science & Tech. | 41.454241 |
Can you see why 2 by 2 could be 5? Can you predict what 2 by 10
Imagine a pyramid which is built in square layers of small cubes.
If we number the cubes from the top, starting with 1, can you
picture which cubes are directly below this first cube?
Place the numbers from 1 to 9 in the squares below so that the differenc... | <urn:uuid:b5714c61-888f-4bce-83ed-8153787e2040> | 3.9375 | 1,547 | Content Listing | Science & Tech. | 77.667143 |
The water column is the basic habitat and the medium through which all other fish habitats are connected.
The water column provides the basic physical and chemical requirements for aquatic life and links all habitats.
Fish use of water column habitat
- Water circulation transports eggs, larvae, food, and oxygen to nurs... | <urn:uuid:1a9c71c9-a110-446b-882c-669a0ea8b963> | 3.796875 | 390 | Knowledge Article | Science & Tech. | 49.377747 |
Around the world, the oceans are in trouble, with declining fish stocks, disappearing coral reefs, and changing water chemistry. This week, researchers published a new map highlighting the human impact on oceans worldwide from 17 different activities, such as fishing, climate change, and pollution. âOur results show th... | <urn:uuid:ef8c82c6-8ceb-4cf4-a0fc-e1c7576fb862> | 2.828125 | 271 | Truncated | Science & Tech. | 45.752387 |
|Family:||Pleuronectidae (righteye flounders)|
American plaice (Hippoglossoides platessoides) are salt water fish that live in the northwest Atlantic Ocean. Like most flatfish, they live on the bottom of the continental shelf, up to 700 metres deep, but spend most of the time at 90 to 200 meters. Their geographical ran... | <urn:uuid:5cd77cc4-0ce8-473e-9d3a-de1a286ed142> | 3.140625 | 237 | Knowledge Article | Science & Tech. | 32.955244 |
In mathematics and in most programming languages, + and - denote addition and subtraction; but what should their types be? Of course, we want to be able to add both integers and floating-point numbers, but these two functions correspond to completely different machine operations; we may also want to define arithmetic o... | <urn:uuid:6d247a8e-fc7f-4fbf-a434-e9ee14a887bb> | 3.46875 | 1,289 | Documentation | Software Dev. | 42.457997 |
Measuring only 5 microns (millionths of a meter) in diameter and 300 nanometers (billionths of a meter) in thickness, has been made by scientists at the University of Melbourne. The ring is a component in a device for producing and detecting single photons. A picture of the ring (see image at http://www.aip.org/png/200... | <urn:uuid:04b90ff4-7066-4cfa-87d2-fbdd03f8ea6b> | 3.375 | 1,142 | Knowledge Article | Science & Tech. | 42.833624 |
So far, transgenic forest trees have only been marketed in China, but over 250 experimental releases of GE forest trees have been conducted worldwide. Canada has been field-testing GE trees since 1997. The research is driven primarily by private businesses from developed nations, including some of the world’s largest p... | <urn:uuid:d26415d1-558c-496c-8382-412dd6b4d3c9> | 3.640625 | 835 | Knowledge Article | Science & Tech. | 22.376429 |
A sled starts from rest at the top of a hill and slides down with a constant...
...acceleration. At some later....? A sled starts from rest at the top of a hill and slides down with a constant acceleration. At some later....?
...time it is 14.4 m from the top; 2.00 s after that it is 25.6 m from the top, 2.00 s later 4... | <urn:uuid:b8a89ea7-91a0-4f0f-97c6-43e183de82b1> | 3.203125 | 273 | Comment Section | Science & Tech. | 110.07773 |
To help with scientific research you don't have to work in a lab. Just visit your garden, local wood or the seashore and you can take part in a national survey, like the Museum’s bluebell survey or the Big Seaweed Search.
Your results will help scientists to find out more about UK species and their distribution, so the... | <urn:uuid:49550999-c3de-41c8-ac5d-dd9ad669bc37> | 3.25 | 288 | Content Listing | Science & Tech. | 52.694923 |
A major volcanic eruption on the island of Hawaii in December 1959 devastated an existing montane rain- and seasonal-forest covering an area of about 500 hectares (ha). The eruption resulted in a massive pahoehoe lava substrate on the crater floor of Kilauea Iki, in a new cinder cone, in an area covered with spatter an... | <urn:uuid:e009bf70-327f-4a88-a202-fd8f21f4e9bd> | 3.390625 | 766 | Knowledge Article | Science & Tech. | 27.018055 |
X-treme Microbes — Text-only | Flash Special Report
Extremophiles are organisms capable of living in conditions that would kill other life-forms, including intense cold, heat, pressure, dehydration, acidity/alkalinity and other chemical and physical extremes. A few animals, such as frogs that freeze solid in winter, ca... | <urn:uuid:5c61e91a-7912-4ba3-b84b-6ca0533d5b1d> | 4.09375 | 1,040 | Knowledge Article | Science & Tech. | 38.597511 |
Owning Class: support
Requires: MathScript RT Module
n = length(a)
Computes the length of a numeric object or string. The length of a matrix is the number of rows or columns in the matrix, depending on which is larger. The length of a string is the number of characters in the string.
|a||Specifies a scalar, vector, or ... | <urn:uuid:e056b6a4-1996-437d-aa88-f6df042ac303> | 2.859375 | 192 | Documentation | Software Dev. | 74.284089 |
The best source of energy for eukaryotic organisms are fats. Glucose offers a ratio 6.3 moles of ATP per carbon while saturated fatty acids offer 8.1 ATP per carbon. Also the complete oxidation of fats yields enormous amounts of water for those organisms that don't have adequate access to drinkable water. Camels and ki... | <urn:uuid:fd18958d-85a2-43c0-84e3-adf84af1381d> | 3.640625 | 406 | Knowledge Article | Science & Tech. | 35.339261 |
Drought 2009 (updated October 1, 2009)
Minnesota's present drought conditions are the result of two spells of dry weather.
2009 growing season dry spell:
With a very few exceptions, 2009 growing season precipitation has been well short of historical averages across Minnesota. As a result, many Minnesota counties are ca... | <urn:uuid:2ec1043f-8246-4ef4-987a-521b28c828ca> | 3.15625 | 665 | Knowledge Article | Science & Tech. | 34.884345 |
Expressions are used in a variety of contexts within SQL statements, particularly in search condition predicates and the SET clause in UPDATE statements respectively. An expression always evaluates to a single value.
The syntax of an expression is as follows:
Note: A user-defined-function is created by using the CREATE... | <urn:uuid:23af80d5-181f-4f00-b75b-d36348f67933> | 2.875 | 93 | Documentation | Software Dev. | 40.037826 |
Date of this Version
Gull numbers roosting at two waterbodies close to a military airfield in central England were monitored at dusk and dawn for four weeks during November 2006. Approximately 25,000 and 8,000 gulls were present at each site respectively. Two LEM 50 laser torches mounted on tripods were then deployed t... | <urn:uuid:8efdbc08-59ac-4365-9bbd-73b09175e015> | 3.171875 | 252 | Knowledge Article | Science & Tech. | 44.28837 |
Date of this Version
Fathead minnows (Pimephales promelas Rafinesque) were continuously exposed to reduced pH levels of 4.5, 5.2, 5.9, 6.6 and 7.5 (control) during a 13-month, one-generation test. Survival was not affected, even at the lowest pH tested. Fish behavior was abnormal, and fish were deformed at pH 4.5 and 5... | <urn:uuid:65f73337-2fb4-4b41-83e8-9feca06aaafe> | 2.6875 | 173 | Academic Writing | Science & Tech. | 72.343713 |
This experiment was performed by the Hydronauts2Fly team within ESA's educational programme: "Fly Your Thesis! - An Astronaut Experience". The Fly Your Thesis! programme gives university students the possibility to fly their scientific experiment in microgravity, as part of their Masters thesis, PhD thesis or research ... | <urn:uuid:56fb3e30-3cfa-4ce7-9176-f603e783e68b> | 2.8125 | 276 | Knowledge Article | Science & Tech. | 35.722209 |
Evolution and Systematics
Members of bryozoan colonies capture tiny plants and animals to feed on by thrusting feathery tentacles into the current.
"The individuals of the bryozoan colony, called zooids, are about one-sixteenth of an inch in length and consist of little more than a digestive system encased within a com... | <urn:uuid:2e39129b-92d2-4b6d-b5d3-81c22b6bcbfb> | 3.75 | 257 | Knowledge Article | Science & Tech. | 48.100015 |
Left: 5-Day composite of the global soil moisture distribution derived from EUMETSAT MetOp-ASCAT data for August 18, 2007. Right: Retrieval noise. Pixels marked in red denote areas with unreliable data due to missing satellite data, mixed pixel effects, or weather and/or vegetation effects. Pixels marked in pink denote... | <urn:uuid:57ef7c82-cdea-4836-bff5-2fc7b75475da> | 2.703125 | 1,054 | Knowledge Article | Science & Tech. | 35.473711 |
Using the scientific notation:
$$3.14 = 0.314 \times 10^1$$
From Tanenbaum's Structured Computer Organization, section B.1:
The range is effectively determined by the number of digits in the exponent and the precision is determined by the number of digits in the fraction.
I know how this notation works but I am asking ... | <urn:uuid:5a31f52f-5382-498b-b3d8-70b6d6014c83> | 3.21875 | 101 | Q&A Forum | Science & Tech. | 68.625 |
On August 23, a magnitude 5.8 earthquake struck the Piedmont region of the U.S. East Coast near Mineral, Virginia. This was an intraplate earthquake – most earthquakes are interplate, meaning that they occur on fault lines that bound tectonic plates. Intraplate earthquakes tend to be much less frequent and much smaller... | <urn:uuid:12486011-013d-4f50-b590-e19316a0d83a> | 4 | 644 | Knowledge Article | Science & Tech. | 40.697047 |
On the question you mentioned, a commentator said, "astrophysicists would be very surprised to find a nonrotating black hole in nature". And the event horizon of a rotating black hole isn't actually going to be spherical.
Anyways, the relaxation to an oblate shape might be quick. Now, this is a messy business. There ha... | <urn:uuid:5f8a98eb-814c-4093-a59c-6cc61163ecc8> | 2.890625 | 431 | Q&A Forum | Science & Tech. | 53.697996 |
For various reasons Eli has been thinking about aerosols and how the mid-century cooling is attributed to them. Now the Bunny has also been consorting with a bunch of acid rain and regional forcasting types and the thought occurred that maybe we have a case here of the urban cooling effect. To make a long story short, ... | <urn:uuid:bb4fed04-3de6-4719-8da8-5cb4afbb1007> | 2.90625 | 249 | Personal Blog | Science & Tech. | 40.924634 |
VBS Home page,VBS
Course Navigator, Basic chemistry,
Hydophilic interactions, Previous
Page, Next Page,top
|Interactions between water and other molecules
such that the other molecules are attracted to water are called hydrophilic
Molecules that have charged parts to them are attracted to the charges within the water m... | <urn:uuid:dfde049b-4973-42ae-a0b7-3dbbed5af910> | 3.546875 | 227 | Knowledge Article | Science & Tech. | 24.665988 |
The calm eye of Typhoon Nabi stands out like a bulls-eye in the center of the concentric circles of color that make up the storm. The colors represent wind speed, with purple and pink showing the highest winds, while tiny barbs show the wind’s direction spinning around the eye of the storm. The white barbs indicate reg... | <urn:uuid:804e6552-507b-4381-b4e4-ee300b827513> | 3.859375 | 446 | Knowledge Article | Science & Tech. | 54.839498 |
In my opinion, this essay is a must read because it clearly illustrates correlation between ocean cycles to; Arctic ice loss and gain, glacier advance and retreat, and land surface temperature rise and fall. As I said graphically in a previous post…
Guest post by Juraj Vanovcan
The following article shows, that decadal... | <urn:uuid:49133bfd-6793-419d-a383-9a5e23cc0260> | 2.96875 | 2,121 | Personal Blog | Science & Tech. | 42.45363 |
The Creation Wiki is now operating on a new and improved server.
From CreationWiki, the encyclopedia of creation science
|Atomic Weight||39.948 g/mol39.948 amu|
|Chemical series||Noble gases|
|Appearance|| Colorless |
|Group, Period, Block||18, 3, p|
|Electron configuration||[Ne] 3s2 3p6|
|Electrons per shell|| 2,8,8 |... | <urn:uuid:78c74965-c299-4d4a-98d6-080f22ba9057> | 3.8125 | 1,177 | Knowledge Article | Science & Tech. | 71.420107 |
Differences between Python 2 and 3 - This articles explains the subtle and not so subtle differences (print ('...'), input(...) and eval(input(..)) instead of raw_input and input in 3, etc)
Python Style Guide - Readability Counts! And hey this document shows a desire for standardization of coding to aid everyone in the... | <urn:uuid:05478550-2840-412a-a90e-686b918d4be6> | 2.953125 | 211 | Comment Section | Software Dev. | 56.32852 |
Newton's First Law of Motion
It's not Halo Wars for X-Box; but you can still have fun with these online, interactive inertia games.Flickr Physics
Visit The Physics Classroom's Flickr Galleries and take a visual overview of Newton's laws of motion.Better than Cool Demo
View a high speed video of the classic demonstratio... | <urn:uuid:e664c54a-8efb-4b62-a41e-35d0bc5e077d> | 4.28125 | 1,282 | Tutorial | Science & Tech. | 58.184738 |
|Jul5-12, 02:20 AM||#1|
Energy lost by charge due to acceleration.
We knew energy is lost when a charge accelerates. What is the form of the energy? Which form of energy of theirs are these charges releasing?
|Jul5-12, 02:54 AM||#2|
The energy is given off in the form of electromagnetic waves. The energy ultimately com... | <urn:uuid:df72181f-6c4a-4293-ad45-bef169136ecf> | 3.140625 | 310 | Comment Section | Science & Tech. | 50.227551 |
In 2008, PISCO researchers documented the rise of anoxic waters caused by upwelling currents. Upwelling currents typically support extremely productive ecosystems (20% of global fishery yield are taken from upwelling areas) because they transport nutrient-rich water from the deep to surface waters where they can be use... | <urn:uuid:9db599ba-9c40-4b44-8c6d-dbaa67bf11e1> | 3.40625 | 238 | Academic Writing | Science & Tech. | 37.79886 |
Radioactive waste is waste type containing radioactive chemical elements that does not have a practical purpose.
It is sometimes the product of a nuclear process, such as nuclear fission.
The majority of radioactive waste is "low-level waste", meaning it has low levels of radioactivity per mass or volume.
This type of ... | <urn:uuid:9a0839fc-4f6c-4e42-bed6-3270a326e6aa> | 4.21875 | 292 | Knowledge Article | Science & Tech. | 28.984495 |
A newly-published review of research in the journal Science this week looks at the effects of climate change on Arctic species. Rapid, widespread changes in the Arctic regions, the authors say, have been especially significant to species that depend on the ice for foraging, reproduction, and predator avoidance, such as... | <urn:uuid:8a05a851-a5d4-4503-9623-bbcb1329729b> | 3.234375 | 153 | Truncated | Science & Tech. | 42.358966 |
Date: Autumn 2012
Creator: Marshall, James L., 1940- & Marshall, Virginia R.
Description: Article describing the discovery of argon, helium, and other inert gases by Lord Rayleigh, Sir William Ramsay, and other collaborators. Ramsay also characterized the noble gases and classified them within the structure of the Peri... | <urn:uuid:9274bd53-02f3-4c26-b7a1-65d74908402c> | 2.9375 | 83 | Content Listing | Science & Tech. | 33.127845 |
Monday , 25 October 2010 is the day that Wi-Fi direct certification was released to the mobile device manufacturer for the first time.
Wi-Fi direct is technology that developed from original Wi-Fi technology (it’s developed by
WiFi Alliance). This technology enable two mobile device to communicate to each other with ea... | <urn:uuid:9bd88f1a-3ab1-4e86-a65d-7efa54ad8f96> | 2.75 | 884 | Personal Blog | Software Dev. | 26.776883 |
|CHOOSE A TOPIC
||A simple equation that will tell how far the planets are away from the Sun.
||Is it possible that we can see only 10% of all the matter in the universe?
||Laws of planetary motion that helped explain planetary orbits.
|Theory of Relativity
||Developed by Einstein, this theory was one of the most revol... | <urn:uuid:98742e7f-ca17-4f5c-9960-aa8c7d4a4bc2> | 3 | 85 | Content Listing | Science & Tech. | 45.099274 |
For the following information (paraphrased from Chapter 1, "A Mathematical and Historical Tour") and much more, see Robert Devaney, A First Course in Chaotic Dynamic Systems.
Chaos occurs in objects like quadratic equations when they are regarded as dynamical systems by treating simple mathematical operations like taki... | <urn:uuid:58a7d2d3-9dba-4d2f-89ce-6e00d6461fb7> | 3.59375 | 423 | Knowledge Article | Science & Tech. | 27.386736 |
News From the Field
Sea Temperatures Less Sensitive to CO2 13 Million Years Ago
June 6, 2012
In the modern global climate, higher levels of carbon dioxide (CO2) in the atmosphere are associated with rising ocean temperatures. But the seas were not always so sensitive to this CO2 "forcing," according to a new report. Ar... | <urn:uuid:8eb8f7ca-d8ad-4a8b-9a4e-37d0f1253bcd> | 2.890625 | 310 | Content Listing | Science & Tech. | 65.185434 |
North Atlantic right whales, which live along North America's east coast from Nova Scotia to Florida, are one of the world's rarest large animals and are on the brink of extinction. Recent estimates put the population of North Atlantic right whales at approximately 350 to 550 animals.
According to a NOAA-led paper publ... | <urn:uuid:74f8a36e-60ce-424f-bf1b-fb4ef4805ced> | 4.0625 | 450 | Knowledge Article | Science & Tech. | 28.899733 |
Global Warming Natural Cycle
Is global warming a natural cycle? Or is global warming affected by human influence? What does the science say? Both are true. In the natural cycle, the world can warm, and cool, without any human interference. For the past million years this has occurred over and over again at 100,000 year... | <urn:uuid:c36c5223-9eba-48df-b084-d07be3e69fcc> | 3.1875 | 1,681 | Knowledge Article | Science & Tech. | 48.476176 |
The reason why think a large red shift corresponds to large distance is that this is what is predicted by General Relativity.
If you make a few simplifying assumptions about the universe you can solve Einstein's equation for the universe to give a result called the FLRW metric. This predicts the universe is expanding a... | <urn:uuid:19c3f590-2f89-4f0e-b848-b4ae42ee1ebb> | 3.1875 | 195 | Q&A Forum | Science & Tech. | 44.226261 |
If you ask a person on the street, “how do you go about looking for supersymmetry?”, that person will probably cross the street quickly. But if you ask this question on the street at CERN, the laboratory which runs the Large Hadron Collider (LHC), you’ll probably get an answer, of the following form: “Look for a surpri... | <urn:uuid:7242ddf8-d84d-402d-8a70-13b653351c3c> | 3.171875 | 3,724 | Nonfiction Writing | Science & Tech. | 45.652197 |
skade88 writes "Wired has a good article that covers the origins of the white dwarf super nova Johannes Kepler observed in 1604. From the article: 'Up until now, it was unclear what lead to the star's explosion. New Chandra data suggests that, at least in the case of Kepler's remnant, the white dwarf grabbed material f... | <urn:uuid:46799ffb-31bb-4c92-8338-d184cbea4c41> | 3.03125 | 166 | Comment Section | Science & Tech. | 49.463627 |
Scientific Name: Chrysemys picta
Hosta, Curt and Leonardo
Hosta came to Blandford after a dog bite left her with a missing chunk of her shell in 2007. This would make it impossible for her to tuck safely into her shell when in danger. The other two came in with leg injuries due to car accidents or attacks by predators ... | <urn:uuid:0b4f89b8-46fc-4cf8-890d-8aaa9eb5d93b> | 3.53125 | 292 | Knowledge Article | Science & Tech. | 47.699359 |
MessageToEagle.com - Space is a challenging place. We think of it as mostly empty, but that is not completely true.
The vast sea of space in our solar system is filled with powerful radiation and bombarded with high-speed atomic particles.
In addition, the Sun generates a continuous stream of particles that we call the... | <urn:uuid:5d72db4d-661c-4069-a76c-867f7908cf35> | 3.40625 | 2,192 | Content Listing | Science & Tech. | 41.100823 |
Limit to Impact Velocity
Name: Rafael C.
If there is no friction, will the terminal velocity of
a falling object reach a specific limit?
In other words, is there a chance (hypothetically) that a falling
object will never reach a terminal velocity if there is no drag present?
Yes. If there is no drag, the object will ju... | <urn:uuid:5ff4d805-49fd-4d56-a50b-172c4fec0de7> | 3.453125 | 728 | Q&A Forum | Science & Tech. | 58.423808 |
|Dec3-11, 08:22 PM||#1|
Angle between tangent and foci. (Involve vector calculus)
1. The problem statement, all variables and given/known data
See the photo on the left
2. Relevant equations
3. The attempt at a solution
|Dec4-11, 06:20 AM||#2|
You must show some work of your own or this thread will be deleted.
|Dec4-11... | <urn:uuid:7a781374-a74a-4691-957b-e6260ebbeb32> | 2.8125 | 289 | Comment Section | Science & Tech. | 59.422737 |
Three different classes of geoengineering identified by the American Meteorological Society and the Royal Society have very different risks and time scales and would play very different roles in a climate strategy.
Climate Remediation Technologies
Climate remediation is similar in concept to cleaning up contamination i... | <urn:uuid:a38de745-d7b2-45a4-bcda-a95bfff884a1> | 3.578125 | 2,370 | Academic Writing | Science & Tech. | 27.298319 |
Studies in Plant Physiology
Primary plant productivity sustains life on Earth and is a natural process for regulating atmospheric carbon dioxide (CO2) concentration. Many of the main features of plant growth and development can be modeled by treating plants as organisms composed of modular morphological subunits with p... | <urn:uuid:e53f4903-1341-44c2-a206-3811e77f0157> | 3.03125 | 854 | Academic Writing | Science & Tech. | 26.92999 |
"The most beautiful thing we can experience is the mysterious." - Albert Einstein
Posted 04 July 2012 - 08:56 AM
Hadron Collider scientists have confirmed that they have discovered the elusive Higgs Boson particle.
Scientists say it is a 5 sigma result which means they are 99. 999% sure they have found a new particle. ... | <urn:uuid:8214e58e-25fc-4e3e-841f-b7b1684f2f6f> | 2.75 | 471 | Comment Section | Science & Tech. | 65.64343 |
By studying fossilized grains of pollen, researchers have reconstructed the climate history of the Antarctic Peninsula, which gave up its vegetation about 12 million years ago. Scientists are studying the region because it has warmed significantly in recent decades.
The rapid decline of glaciers along the peninsula has... | <urn:uuid:14dd02d0-341d-47c8-b7ba-553b9ce6f22b> | 3.921875 | 142 | Truncated | Science & Tech. | 27.108789 |
SUMMARY PARAGRAPH for RPL24A
About yeast ribosomes...
Ribosomes are highly conserved large ribonucleoprotein (RNP) particles, consisting in yeast of a large 60S subunit and a small 40S subunit, that perform protein synthesis. Yeast ribosomes contain one copy each of four ribosomal RNAs (5S, 5.8S, 18S, and 25S; produced... | <urn:uuid:0d312374-8428-41d6-a7d7-003843dd6a46> | 2.921875 | 663 | Academic Writing | Science & Tech. | 46.117459 |
Inelastic X-ray Scattering Reveals Microscopic Transport Properties of Molten Aluminum Oxide
The transport properties of high-temperature oxide melts are of considerable interest for a variety of applications, including modeling the Earth's mantle, optimizing aluminum production, confining nuclear waste, and investigat... | <urn:uuid:8ac9245d-946c-4b3b-a9c4-f0838f2a59ce> | 2.984375 | 1,062 | Academic Writing | Science & Tech. | 48.703665 |
In the constellation Sagittarius
4.1 million times the mass of the Sun
Diameter roughly 15 million miles (24 million km).
The supermassive black hole at the center of our Milky Way galaxy lies behind dense clouds of gas and dust. The center of the galaxy is a little above the "spout" of the teapot-shaped constellation ... | <urn:uuid:9c6fd801-7e3c-4cad-aedf-d3f9c2926fd6> | 3.640625 | 135 | Knowledge Article | Science & Tech. | 56.850882 |
Crab Eating Macaque
Image Source: eol
The crab-eating macaque (Macaca fascicularis), also known as the Java macaque, or long-tailed macaque, is a species of primate located throughout Southeast Asia. The species is sexually dimorphic, so the crab-eating macaque weighs between 4.8 to 7 kg for males and 3 to 4kg for fema... | <urn:uuid:3172f2a5-8536-4713-8099-951bf77fa5d2> | 3.421875 | 585 | Knowledge Article | Science & Tech. | 43.327935 |
SUMMARY: In late January, astronomers celebrated the creation of an artificial star in the nighttime sky. The star was created 90 km up in the atmosphere by a powerful laser projected out of the ESO's fourth 8.2m Unit Telescope of the Very Large Telescope at Cerro Paranal in Chile. This artificial star allows the teles... | <urn:uuid:5a1edf95-e903-46fe-8e87-029f5787fe50> | 3.421875 | 117 | Comment Section | Science & Tech. | 48.232955 |
Quasars or quasi-stellar radio source, from the method by which they where originally discovered : as stellar optical counterparts to small regions of strong radio emission. With increasing spatial resolution of radio telescopes the strong radio emission often seemed to come from a pair of lobes surrounding many of the... | <urn:uuid:6173ec42-f891-4f82-af03-bc01b4ff762b> | 3.46875 | 646 | Knowledge Article | Science & Tech. | 32.290653 |
Turbulence causes large variations in point and line-averaged wind measurements. These variations often dominate the difference between traditional measurements and the VIL observations. Therefore, the point and line-averaged measurements are not referenced when analyzing the accuracy of the wind profiling method. Calc... | <urn:uuid:b3702024-2f77-4d8b-afe3-e67c08a3cfcb> | 2.921875 | 1,160 | Academic Writing | Science & Tech. | 45.443934 |
Since geometry and algebra are often discovered to be two sides to the same phenomena, I suggest that you develop your geometric intuition to understand algebraic phenomena. A typical example here is to use the abstract tensor formalism to understand Hopf algebras. From my personal experience, Hopf algebras did not com... | <urn:uuid:e1318835-017b-4601-9d5b-70a88cb227b2> | 2.796875 | 208 | Comment Section | Science & Tech. | 36.304706 |
Diffusion tensor imaging is used in magnetic resonance imaging to attempt quantify the diffusional direction of water on a voxel-by-voxel basis. The standard method to do this is to apply diffusion encoding gradient along multiple gradient directions during a spin-echo pulse sequence and then calculate the water diffus... | <urn:uuid:d7de4360-50fe-4e29-b558-57b5f1134f0a> | 3.34375 | 447 | Knowledge Article | Science & Tech. | 64.895941 |
W. E. Moeckel
Large downstream movements of transition observed when the leading edge of a hollow cylinder or a flat plate is slightly blunted are explained in terms of the reduction in Reynolds number at the outer edge of the boundary layer due to the detached shock wave. The magnitude of this reduction is computed fo... | <urn:uuid:7a24c619-8cc5-4c22-80a3-9356bf22dc4a> | 2.890625 | 200 | Academic Writing | Science & Tech. | 43.10455 |
Last summer I had the amazing opportunity to be on board the U.S. Coast Guard Icebreaker Healy, in partnership with N.A.S.A.’s ICESCAPE mission to study the effects of ocean acidification on phytoplankton communities in the Arctic Ocean. We collected thousands of water samples and ice cores in the Chukchi and Beaufort ... | <urn:uuid:36c36f1e-d80b-471c-a1c5-807be9bcce28> | 3.28125 | 501 | Personal Blog | Science & Tech. | 45.316849 |
Plants terrestrial. Roots occasionally branching laterally, yellowish to black, 0.5--2 mm diam., smooth or with corky ridges, not proliferous. Stems upright, forming caudex to 5 mm thick; gemmae absent or minute, spheric. Trophophores ascending to perpendicular to stem, sessile or stalked; blades linear, oblong, or del... | <urn:uuid:7151810a-7d1d-4d60-aba5-30edbc3f5a76> | 3.3125 | 426 | Knowledge Article | Science & Tech. | 40.386674 |
The intent of this library is to implement the unordered containers in the draft standard, so the interface was fixed. But there are still some implementation decisions to make. The priorities are conformance to the standard and portability.
The wikipedia article on hash tables has a good summary of the implementation ... | <urn:uuid:8773dcfd-3af8-49fa-82cd-20be3d9212e7> | 2.765625 | 411 | Documentation | Software Dev. | 45.198631 |
On the Shipwreck Trail
This Indiana Jones takes students diving at sunken vessels.
What they discover is a real treasure.
The year was 2002 and Bill Jones was standing on the deck
of the Spiegel Grove, a 50-year-old retired navy ship slated
for sinking in the Florida Gulf. The project was 10 years and
a million dollars... | <urn:uuid:f5620411-2cc0-4b6b-92da-d8b6c902ce9d> | 3.015625 | 1,229 | Nonfiction Writing | Science & Tech. | 45.863322 |
Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °
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I haven't touched this math in, well, about 15 yrs And what I learned I forgot, some of it, not all, now I want to get my brain going, I'm going... | <urn:uuid:7acd67e5-70d9-4e29-8d75-d94b738c0573> | 2.734375 | 278 | Comment Section | Science & Tech. | 67.857749 |
Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2012 March 12 The Scale of the Universe - Interactive Flash Animation Credit & Copyright: Cary & Michael Huang
Free Science Curriculum
Home > 404 - ... | <urn:uuid:f2cae51b-c8cf-449e-a8cf-bc64cfaa6c31> | 2.6875 | 583 | Content Listing | Science & Tech. | 57.961928 |
|Oct1-10, 08:59 PM||#1|
1. The problem statement, all variables and given/known data
complete the following decay equations by inserting the missing particle or nuclide information. Identify each type of decay.
see attached screenshot please.
2. Relevant equations
3. The attempt at a solution
I've done all of the decay... | <urn:uuid:7dda5caf-45f6-40a5-a1a4-1fe061cd31a4> | 3.203125 | 273 | Comment Section | Science & Tech. | 61.331263 |
Protein crystal growth on Mir (DCAM)
Last round of DCAM specimens set for launch Space Shuttle-Mir Science Program (STS-89/91)
Jan. 14, 1998: Experiments with the Diffusion-controlled Crystallization Apparatus for Microgravity (DCAM) aboard the Mir space station will conclude with a payload of six trays of cells to be ... | <urn:uuid:610c2ece-773f-4f50-96ef-8f9ce4b831bb> | 3 | 1,787 | Knowledge Article | Science & Tech. | 41.116303 |
Natural phenomena relating to heated water generated by igneous activity.
Geothermal and hydrothermal activity [ More info] Glossary of geothermal and hydrothermal activity terms.
Distribution of high-temperature (>150 °C) geothermal resources in California [ More info] Description and map of geothermal resources in Ca... | <urn:uuid:6a80d22c-0116-421f-a0c5-7524826544d9> | 2.875 | 260 | Content Listing | Science & Tech. | 20.072907 |
int accept(int s, struct sockaddr *addr, int *addrlen);
The argument s is a socket that has been created with socket.3n and bound to an address with bind.3n and that is listening for connections after a call to listen.3n accept() extracts the first connection on the queue of pending connections, creates a new socket wi... | <urn:uuid:87a2915a-05ec-4ea2-b4b1-29282ca191ba> | 3.40625 | 421 | Documentation | Software Dev. | 60.793619 |
Source code: Lib/textwrap.py
The textwrap module provides two convenience functions, wrap() and fill(), as well as TextWrapper, the class that does all the work, and a utility function dedent(). If you’re just wrapping or filling one or two text strings, the convenience functions should be good enough; otherwise, you s... | <urn:uuid:478b9e86-c158-44a9-a808-8a934a8762a3> | 3.203125 | 1,226 | Documentation | Software Dev. | 50.795449 |
Oscillation is the repetitive variation, typically in time, of some measure about a central value (often a point of equilibrium) or between two or more different states. Familiar examples include a swinging pendulum and AC power. The term vibration is sometimes used more narrowly to mean a mechanical oscillation but so... | <urn:uuid:1ccdc184-d3fe-40fe-aebb-a83064b16fd0> | 3.96875 | 913 | Knowledge Article | Science & Tech. | 26.87346 |
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When optical components are reduced to the nanoscale, they exhibit interesting properties that can be harnessed to create new devices. For example, imagine a bl... | <urn:uuid:f3415627-b0eb-4eb5-8063-ec283e2326e8> | 2.890625 | 185 | Content Listing | Science & Tech. | 24.200458 |
May 27, 2010
For researchers the easiest new species to discover were insects: over 48 percent of the new species described in 2008 were insects. Over a third of the new insects were beetles. Mammals were among the most difficult: researchers discovered only 41 new species of mammal in 2008, nearly a third of which wer... | <urn:uuid:4e1724a4-8eb1-416a-ae1c-c62934d4b5f9> | 3.53125 | 696 | Content Listing | Science & Tech. | 51.192431 |
Units Used in Chemical Oceanography
In chemical oceanography most of the numerical results are expressed as concentrations—that is, as the amounts of various constituents in a certain quantity of sea water. Obviously many different combinations
Only two units are to be used for expressing the quantity of sea water: eit... | <urn:uuid:97419252-6940-4a3f-a0a1-8cca176e2ea2> | 3.484375 | 726 | Documentation | Science & Tech. | 28.909548 |