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%ما هو (من)٪ 1 - تعريف
PERIOD BEFORE A CLINICAL TRIAL IS COMMENCED WHEN NO TREATMENT IS GIVEN
Washout period
Washout (erosion)
SUDDEN EROSION (USUALLY BY WATER) OF EITHER NATURAL TERRAIN OR MAN-MADE OBJECTS (SUCH AS ROADS AND RAILROADS)
Wshout; Track washout
A washout is the sudden erosion of soft soil or other support surfaces by a gush of water, usually occurring during a heavy downpour of rain (a flash flood) or other stream flooding. These downpours may occur locally in a thunderstorm or over a large area, such as following the landfall of a tropical cyclone.
Washout (aeronautics)
![CF-18 Hornet.]] Note the angle of the Sidewinder missile on the wingtip rail as compared to the angle of attack of the fuselage. The Hornet has approximately 4 degrees of washout.](https://commons.wikimedia.org/wiki/Special:FilePath/Canadian CF-18.jpg?width=200 "CF-18 Hornet.]] Note the angle of the Sidewinder missile on the wingtip rail as compared to the angle of attack of the fuselage. The Hornet has approximately 4 degrees of washout.")
CHARACTERISTIC OF AIRCRAFT DESIGN
Washout (aviation); Washin; Wash-in
Washout is a characteristic of aircraft wing design which deliberately reduces the lift distribution across the span of an aircraft’s wing. The wing is designed so that the angle of incidence is greater at the wing roots and decreases across the span, becoming lowest at the wing tip.
Run-in period
Run-in period is a period between the recruitment and randomization phases of a clinical trial, when all participants receive the same treatment, which may be active treatment, a placebo or no treatment at all. The clinical data from this stage of a trial are only occasionally of value but can serve a valuable role in screening out ineligible or non-compliant participants, in ensuring that participants are in a stable condition, and in providing baseline observations.
ويكيبيديا
Run-in period
Run-in period is a period between the recruitment and randomization phases of a clinical trial, when all participants receive the same treatment, which may be active treatment, a placebo or no treatment at all. The clinical data from this stage of a trial are only occasionally of value but can serve a valuable role in screening out ineligible or non-compliant participants, in ensuring that participants are in a stable condition, and in providing baseline observations. A run-in period is sometimes called a washout period if treatments that participants were using before entering the clinical trial are discontinued.
