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Data and Telecommunications, terms, concepts and abbreviations.
(19 terms)
DS1
A transmission line with bandwidth sufficient to carry 24 DS0 (64 or 56 Kbps depending on coding) channels. A Full DS0 consumes 1.544Mbps of bandwidth.
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Computer Hardware parts, abbreviations and concepts.
(6 terms)
SDRAM
A generic name for various kinds of dynamic random access memory: DRAM that are synchronized with the clock speed that the microprocessor is optimized for. This tends to increase the number of instructions that the processor can perform in a given time. The speed of SDRAM is rated in MHz rather than in nanoseconds (ns). This makes it easier to compare the bus speed and the RAM chip speed. You can convert the RAM clock speed to nanoseconds by dividing the chip speed into 1 billion ns (which is on...
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Graphic Design & prepress terms from desktop publishing to offset printing.
(14 terms)
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Linux/Unix Terms and Commands.
(9 terms)
ln
ln [options] sourcename [destname]
ln [options] sourcenames destdirectory Create pseudonyms (links) for files, allowing them to be accessed by different names. In the first form, Link sourcename to destname, where destname is usually a new filename, or (by default) the current directory. If destname is an existing file, it is overwritten; if destname is an existing directory, a Link named sourcename is created in that directory. In the second form, create links in destdirectory, each l... |
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Photography terms and concepts, including digital and traditional photographic techniques.
(11 terms)
Aperture
The opening of a lens that admits light. Except in very simple cameras, the Aperture can be varied in size by an adjustable diaphragm, which regulates the amount of light passing through the lens. The relative Aperture is measured as the focal length of the lens divided by the diameter of the Aperture; this is expressed as an f-number: f/3, f/5, and so on.
Aperature has a dramatic effect on the Depth-of-field of the photograph. |
Web design termonology, concepts, and abbreviations.
(46 terms)
JPEG
A compressed graphics format specifically designed for photographs. Itīs name an acronym that stands for Joint Photographic Experts Group. It works by changing the images data from colours to frequencies (that represent detail) using a FFT and then discarding some of the high detail data - the resulting image is slightly blurry but this is barely noticable by the human eye and represents a significant saving of space.
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