Showing papers by "Hyun-Chul Kim published in 1987"
TL;DR: In this paper, the friction characteristics between an abrasive belt and a driver and driven pulley were studied and the normal and tangential forces were measured by separate force transducers.
31 citations
TL;DR: It is shown that livers of vitamin A-deficient rats had a 2-4-fold increase in the level of fibronectin mRNA and also a higher transcription rate, which represents the first reported observation of an action ofitamin A at the genomic level on the synthesis of a specific protein in liver.
24 citations
TL;DR: In this paper, the effect of belt velocity on normal and tangential belt forces and centrifugal forces on belt tension was investigated theoretically to determine the effect on belt drive behavior, and it was found that the belt force increased with belt velocity for positive λ and decreased with negative λ. The active angles and distribution of normal pressure forces change to balance the applied torque load.
7 citations
Patent•
19 Jun 1987
TL;DR: In this paper, a machine is presented for measuring normal and tangential belt forces versus angular position for a flat belt drive using a normal force transducer and a tangential force transducers.
Abstract: A machine is presented for measuring normal and tangential belt forces versus angular position for a flat belt drive. A normal force transducer which is designed like a curved beam and the tangential force transducer which is designed like a cantilever with head are used as contact pulleys. The transducer pulley is used as either a driving pulley or a driven pulley. Each pulley is mounted on a carriage plate which slides with linear bearings. Means are provided for applying a predetermined belt initial tension through the sliding carriage plate and means are also provided for applying torque load through a torque disk.
5 citations
Patent•
31 Aug 1987
TL;DR: In this article, a machine is presented for measuring normal and tangential belt forces as well as the grinding friction force all versus the angular position for abrasive belt grinding, where a cylindrical workpiece is driven by a variable speed A.C. motor through a torque sensor.
Abstract: A machine is presented for measuring normal and tangential belt forces as well as the grinding friction force all versus the angular position for abrasive belt grinding. Normal and tangential force transducers, having the same surface shape and surface finish as the contact pulley, are assembled in the contact pulley. The instrumented contact pulley is used as a driving or driven pulley. A variable speed D.C. motor rotates the driving pulley. A cylindrical workpiece is driven by a variable speed A.C. motor through a torque sensor. The torque sensor determines the grinding friction force between the workpiece and the belt. The A.C. motor-torque sensor assembly is mounted on a carriage plate which slides on two rails with linear bearings. Means are provided for applying a predetermined belt tension and means are also provided for applying a workpiece grinding normal force.
4 citations
TL;DR: The distribution of the total energy and multiplicity of gamma rays feeding the yrast transitions has been measured for /sup 158,159/Er, /sup 130/Ce, and /sup 116,117/Te, which are produced in several heavy-ion fusion reactions.
Abstract: The distribution of the total energy and multiplicity of gamma rays feeding the yrast transitions has been measured for /sup 158,159/Er, /sup 130/Ce, and /sup 116,117/Te, which are produced in several heavy-ion fusion reactions. The observed shape of the distribution feeding discrete yrast states varies with the spin of the yrast transition. However, the differences are small, especially for heavier-ion induced reactions.
1 citations