Abstract: “Ribbon tranducer with improved excursion and dispersion characteristics” A method of employing one or more flexible suspension elements attached to a ribbon-type electroacoustic transducer diaphragm such that a bend created in the diaphragm by the flexible suspension element(s) allows the transducer to display broader acoustic dispersion in the plane orthagonal to the net diaphragm surface is described. Additionally, a type of material employed for the flexible suspension which offers minimal acoustic interference to sound radiated from the diaphragm.

Abstract: The method of controlling estrus and ovulation in female bovines by the administration of 11-lower alkyl steroids and 11-lower alkyl steroid compositions for use therein.Drug delivery system for the controlled elution of 11-lower alkyl steroids comprising the steroid adsorbed in a copolymer of a monoester of an olefinic acid and a diester of an oelfinic acid. The method of controlling estrus and ovulation in female bovines by the implantation of said drug delivery system in the bovines, followed by removal at a predetermined period, alternatively augmenting the estrus response by administration of an estrogenic compound.