number of exposures
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Number needed to harm — The number needed to harm (NNH) is an epidemiological measure that indicates how many patients need to be exposed to a risk factor over a specific period to cause harm in one patient that would not otherwise have been harmed.[1] It is defined as… … Wikipedia
DX number — DX I2/5 barcode on a 135 film cartridge The DX number is assigned by the International Imaging Industry Association (I3A). It uniquely identifies the type and manufacturer (sensitizer) of a film emulsion. A proprietary list of DX numbers for APS… … Wikipedia
Common Vulnerabilities and Exposures — The Common Vulnerabilities and Exposures or CVE system provides a reference method for publicly known information security vulnerabilities and exposures. MITRE Corporation maintains the system, with funding from the National Cyber Security… … Wikipedia
photography, 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… … Universalium
DX encoding — 135 Film Cartridge with DX barcode (top) and DX CAS code DX (Digital indeX) encoding is an ANSI and I3A standard, originally introduced by Kodak in March 1983, for marking 135 and APS photographic film and film cartridges. It has several parts, a … Wikipedia
Press camera — A press camera is a medium or large format camera suitable for use by press photographers.Press cameras were widely used from the 1900s through the early 1960s and commonly had the following features: * collapsible into strong, compact boxes *… … Wikipedia
Toxicity — This article is about the scientific term. For other uses of toxicity and toxic, see Toxicity (disambiguation). The skull and crossbones is a common symbol for toxicity. Toxicity is the degree to which a substance can damage a living or non… … Wikipedia
History of the camera — The first permanent photograph was made in 1826 or 1827 by Joseph Nicéphore Niépce using a sliding wooden box camera made by Charles and Vincent Chevalier in Paris. Niépce built on a discovery by Johann Heinrich Schultz (1724): a silver and chalk … Wikipedia
Advertising media selection — is the process of choosing the most cost effective media for advertising, to achieve the required coverage and number of exposures in a target audience. Contents 1 Performance 1.1 Frequency 1.2 Spread … Wikipedia
Supermarine Spitfire (early Merlin powered variants) — Infobox Aircraft name =Spitfire type =Fighter manufacturer =Supermarine caption =Spitfire Vc launching from USS Wasp designer =R. J. Mitchell first flight =5 March 1936 introduction =1938 retired =1955, RAF status = primary user =Royal Air Force… … Wikipedia
gross impressions — The total number of exposures to a marketer’s message. One person seeing an advertisement four times counts as four exposures … American business jargon
