TR-55


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TR-55

(TRansistor-1955) Sony's first transistorized radio. Introduced in 1955, the TR-55 and all the other small, portable radios that followed helped rock and roll to flourish, because teenagers could listen to their favorite music wherever they congregated.
References in periodicals archive ?
HydroCAD Software Solutions LLC -develops Hydrology & Hydraulics software for use by Civil Engineers, including the HydroCAD Stormwater Modeling System, which provides easy TR-20, TR-55, SBUH, and Rational hydrology, plus TC calculations, pond storage, and pond and reach routing, in an interactive graphical environment.
TR-55 is widely used for calculating runoff and peak discharge in small urban watersheds and is specified in many municipal design codes as the preferred, or one of the acceptable, methods of estimating peak flows.
In addition, hydraulics can be determined with the SCS modified rational method, TR-55.
Don Woodward, national hydraulic engineer at the Natural Resources Conservation Service, is one of the authors of TR-55, the stormwater model embedded in CITYgreen.
Hydrology models in common use, such as TR-55, provide satisfactory estimates of runoff in most geologic regions and within the parameters of the models.