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The typical efficiency of TEGs is around 5–8%, although it can be higher. Older devices used bimetallic junctions and were bulky. More recent devices use highly doped semiconductors made from bismuth telluride (Bi 2 Te 3), lead telluride (PbTe), [10] calcium manganese oxide (Ca 2 Mn 3 O 8), [11] [12] or combinations thereof, [13] depending on application temperature.
A "Hello, World!"program is generally a simple computer program that emits (or displays) to the screen (often the console) a message similar to "Hello, World!".A small piece of code in most general-purpose programming languages, this program is used to illustrate a language's basic syntax.
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The Geek Code was invented by Robert A. Hayden in 1993 and was defined at geekcode.com. [3] It was inspired by a similar code for the bear subculture - which in turn was inspired by the Yerkes spectral classification system for describing stars. [4] [5] [6] After a number of updates, the last revision of the code was v3.12, in 1996. [7]
The meta element has two uses: either to emulate the use of an HTTP response header field, or to embed additional metadata within the HTML document. With HTML up to and including HTML 4.01 and XHTML, there were four valid attributes: content, http-equiv, name and scheme. Under HTML 5, charset has been added and scheme has been removed.
The apps could be customized using HTML, CSS, JavaScript, JQuery and Google's own material design visual framework. [4] [5] [6] PC Magazine rated Google App Maker 3.5/5. [7] Following Google's acquisition of AppSheet, the App Maker editor and user apps was shut down on January 19, 2021. New app creation was disabled on April 15, 2020.
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The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. [5] [6] [7] The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; [8] the pattern of position detection was found and determined by applying the least-used ratio (1:1:3 ...