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51Electronic amplifier — A practical amplifier circuit An electronic amplifier is a device for increasing the power of a signal. It does this by taking energy from a power supply and controlling the output to match the input signal shape but with a larger amplitude. In… …
52History of film — This article is about the history of cinema. For other uses, see History of photography. Years in film 1870s 1880s 1890s …
53Blood transfusion — Intervention Plastic bag containing packed red blood cells in citrate, phosphate, dextrose, and adenine (CPDA) solution …
54Oscilloscope — This article is about current oscilloscopes, providing general information. For history of oscilloscopes, see Oscilloscope history. For detailed information about various types of oscilloscopes, see Oscilloscope types. Illustration showing the… …
55List of films considered the worst — The films listed here have achieved notably negative reception as being called the worst films ever made. The films have been cited by a combination of reputable sources as the worst movies of all time. Examples of such sources include Metacritic …
56Video camera tube — In older video cameras, before the mid to late 1980s, a video camera tube or pickup tube was used instead of a charge coupled device (CCD) for converting an optical image into an electrical signal. Several types were in use from the 1930s to the… …
57History of photography — The first permanent photograph was an image produced in 1826[1] by the French inventor Joseph Nicéphore Niépce.[2] …
58Anamorphic format — is a term that can be used either for the cinematography technique of capturing a widescreen picture on standard 35 mm film, or other visual recording media with a non widescreen native aspect ratio, or a photographic projection format in which… …
59literature — /lit euhr euh cheuhr, choor , li treuh /, n. 1. writings in which expression and form, in connection with ideas of permanent and universal interest, are characteristic or essential features, as poetry, novels, history, biography, and essays. 2.… …
60Molecular graphics — (MG) is the discipline and philosophy of studying molecules and their properties through graphical representation.[1] IUPAC limits the definition to representations on a graphical display device .[2] Ever since Dalton s atoms and Kekulé s benzene …
