pulse delay interval
51Outline of television — The following outline is provided as an overview of and topical guide to television: Television (TV) – telecommunication medium for transmitting and receiving moving images that can be monochromatic (shades of grey) or multicolored. Images are… …
52Bat — For other uses, see Bat (disambiguation). Bats Temporal range: 52–0 Ma …
53Timeline of binary prefixes — This article presents a terminology timeline of binary prefixes.1940s; 1943 1944:*J.W. Tukey coins the word bit as an abbreviation of binary digit . [http://catb.org/ esr/jargon/html/B/bit.html The Jargon File (version 4.4.7)] ] ; 1948:*… …
54quantum mechanics — quantum mechanical, adj. Physics. a theory of the mechanics of atoms, molecules, and other physical systems that are subject to the uncertainty principle. Abbr.: QM Cf. nonrelativistic quantum mechanics, relativistic quantum mechanics. [1920 25]… …
55photography, technology of — Introduction equipment, techniques, and processes used in the production of photographs. The most widely used photographic process is the black and white negative–positive system (Figure 1 >). In the camera the lens projects an image of… …
56Lightning — This article is about the atmospheric electrical phenomenon. For other uses, see Lightning (disambiguation). See also: Lightning strike Lightning striking Atlanta, United States Lightning is an atmospheric electrostatic discharge (spar …
57Artificial pacemaker — Cardiac resynchronization therapy and CRT (Cardiac Resynchronization Therapy) redirect here. For the device termed a CRT D, see Implanted cardiac resynchronization device. For other uses, see Pacemaker (disambiguation). A pacemaker, scale in… …
58Global navigation satellite system — (GNSS) is the standard generic term for satellite navigation systems that provide autonomous geo spatial positioning with global coverage. A GNSS allows small electronic receivers to determine their location (longitude, latitude, and altitude) to …
59Menarche — (  /mɨˈn …
60Subarachnoid hemorrhage — ICD9|852.0 ICD9|852.1 ICDO = OMIM = 105800 MedlinePlus = 000701 eMedicineSubj = med eMedicineTopic = 2883 eMedicine mult = eMedicine2|neuro|357 eMedicine2|emerg|559 MeshID = D013345 Subarachnoid hemorrhage (SAH, pron en|ˌsʌbəˈræknɔɪd ˈhɛm(ə)rɪdʒ) …
