On the old fashioned, now obsolete red-yellow-blue pigment color wheel (in which red, yellow, and blue were regarded as the primary colors and orange, green, and violet were regarded as the secondary colors), "red-violet" was a tertiary color between red and violet on the red-yellow-blue pigment color wheel and thus was the equivalent of pigment purple. The other tertiary colors on a red-yellow-blue (RYB) color wheel were called blue-violet, blue-green, yellow-green, yellow-orange, and red-orange.
The RYB color wheel is still often used to teach color to children.
It has been reported by ophthalmologists that those who have their lenses removed and replaced with clear plastic intraocular lenses can see partway into the ultraviolet and view electric purple (a tone of red-violet) on the spectrum beyond Violet because it has been shown that the retina has some ultraviolet sensitivity which is normally blocked by the natural lens. Presumably, tetrachromatic animals such as birds can also see this color on the spectrum. These observers able to see partially into the ultraviolet describe the color they can see beyond violet in the ultraviolet as a sort of lilac, that is, a reddish-violet (purple) color that is the color of the lilac flower. (Presumably this color that they see would be electric purple, since electric purple is a pure chroma on the color wheel and would presumably be the color we would see on the spectrum beyond violet if we could see into the ultraviolet.)
Note: The spectrum colors can only be approximated on a computer screen but the colors shown below are a close approximation of the spectral colors red and violet, shown compared to the non-spectral color red-violet (a deep tone of the color magenta tending toward rose).
Philatelic materials
Philatelic materials are postage stamps, se-tenants, souvenir sheets, sheets of stamps, postal stationery, postal markings, and other indicia (markings on a mail piece showing that postage has been paid by the sender) that are objects of stamp collecting.
Postage meter
A postage meter is a mechanical device used to create and apply physical evidence of postage to mailed matter.
Kiloware
Kiloware is a term for packages of postage stamps sold to stamp collectors by weight rather than by quantity, often in kilograms, hence the name. Kiloware usually consists of used stamps and commonly still on paper, although off paper stamps may also be sold as kiloware.
Bent
The term bent may refer to:
Thrush
Thrush may mean:
Candidiasis
Candidiasis, often called yeast infection or thrush, is a type of infectious disease. It is a fungal infection (mycosis). The disease is caused by any of the "Candida" species of yeast. "Candida albicans" is the most common species.
"Candida" yeasts are common in most people. The yeast is usually controlled in the body. When the yeast grows without control, an infection happens.
A weakened, unhealthy, or young immune system may allow candidiasis to develop. HIV/AIDS, cancer treatments, steroids, stress and not enough nutrients may cause candidiasis.
Antibiotic and steroid use are the most common reason for uncontrolled yeast. Antibiotic kills some bacteria, and changes the balance of microorganisms in the body. This may allow the yeast to multiply.
Esophageal candidiasis is an infection of the esophagus by "Candida albicans". The disease happens in unhealthy people. Sometimes people will get the infection when they are treated with chemotherapy. People with AIDS can also get this infection more often.
One sign of esophageal candidiasis is painful swallowing. Weight loss can happen when a person has esophageal candidiasis for a long time.
Oral candidiasis is a yeast infection of the mouth. It is located on the mucous membranes of the mouth. It is caused by "Candida albicans", "Candida glabrata" or "Candida tropicalis".
Candida may appear as thick white or cream-coloured areas on mucosal membranes. The infected mucosa of the mouth may look inflamed. In babies the condition is called thrush. For babies, it is usually painless and causes no pain. Adults may experience discomfort or burning sensation.
In healthy persons, candidiasis is usually a very small infection of the skin or mucous membranes. These areas include:
Candidiasis is a very common cause of vaginal irritation, or vaginitis. It can also occur on the penis or scrotum. In unhealthy patients, the "Candida" infection can affect the esophagus. It could get everywhere in the body. This would cause a much more serious health condition, a state called candidemia.
Graphics processing unit
A graphics processing unit (GPU) is a processor that renders (or creates) images, animations, and graphics and displays them for the computer’s screen. A strong GPU is able to process complex animations and graphics smoothly and efficiently.
There are generally two types of images which GPU has to calculate, which is also called rendering. Most applications like the operating system’s desktop (except e.g. Windows Vista’s Aero Desktop) or office applications, the GPU has to render two dimensional (2D) pictures. Modern GPUs are so powerful that there is no difference in 2D performance between low-cost and expensive GPUs.
Some applications use 3D pictures to simulate three-dimensionality. Examples for such applications are computer and video games or applications for design and technical construction (CAD). The 3D acceleration performance of GPUs differs greatly. Generally, more expensive GPUs can render faster than low-cost ones.
Nvidia, AMD, and Intel are the most common designers of graphics cards. However, many manufacturers work with these three companies to manufacture the actual hardware. These manufacturers include, but are not limited to, Asus, MSI, and EVGA. AMD and Intel sometimes include integrated GPUs embedded in their CPUs but these are not as powerful as a dedicated external GPU that is seperate from the CPU.
The first graphics cards were used in the 1970’s within arcade machines as a cheaper alternative to random access memory (RAM). However, graphics cards were not viable for consumer products until the release of the Large Scale Integration (LSI) circuit chip in the 1980’s. During the early-to-mid 1990’s, graphics cards that were capable of 3D support became more common in arcade, computer, and console games. The first consumer-level GPU meant for personal computers was the Nvidia GeForce 256, which was released in 1999.
GPUs are commonly used in computers and video game systems to render graphics for video games that may not be playable without the proper GPU. However, other devices such as virtual reality headsets and driverless cars also use GPUs. GPU computing, which every tasks that a GPU can do, includes calculations, artificial intelligence programming, photo editing, and other applications.
The term GPU computing combines all tasks a GPU can calculate that go beyond simple calculation and output of pictures. It is also known under the term General Purpose Computation on Graphics Processing Unit. Tasks are calculation of physics, Artificial Intelligence or even acceleration of video and picture editing. One of the first applications to support GPU computing is Adobe’s Photoshop CS4.
nVidia calls their attempt at GPU Computing CUDA. This is nVidia's interface for using their GPUs for general computing tasks. CUDA is based on the C programming language.
ATi is calling their attempt Stream. There were some earlier attempts under a different name prior to Stream’s release with ATi’s graphics driver “Catalyst 8.12” in December 2008.
S3 Graphics showed a first application for video editing which is accelerated by their latest GPUs. Yet, there is no information whether S3 Graphics will continue to increase their efforts in GPU computing.