The paper analyzes the influence of material from which ferromagnetic core a transformer is made on characteristics full-bridge converter. Experimental investigations were carried out for three bridge converters containing transformers with ring cores various materials: iron powder, ferrite, and nanocrystalline material. properties aforementioned considered in wide range changes input voltage, ...

SiCp reinforced aluminium matrix composites (AMCs), which are widely used in the aerospace, automotive, and electronic packaging fields along with others, usually prepared by ex situ techniques. However, interfacial contamination poor wettability of techniques make further improvement their comprehensive performance difficult. In this paper, AMCs theoretical volume fractions 15%, 20%, 30% powde...

The present study was designed to determine the physicochemical properties of yam (Dioscorea) solution fermented by L. bulgaricus, the protective effect of fermented Dioscorea opposita Thunb. on stomach lesions, and the possibility of its application to fermented dairy products. When the concentration of yam increased, the pH increased in raw powder samples but not in extracted powder samples. ...

Implanon® consists of a core and a membrane. The core contains 68 mg etonogestrel dispersed in a matrix of ethylenevinylacetate (EVA) co-polymer and the external membrane is made of EVA co-polymer (0.06 mm).2 This differs from the Norplant subdermal contraceptive device in which the levonorgestrel powder is free within the silastic cavity, and if this cavity is broken the powder will be dispers...