• 한국식품저장유통학회지
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• 제7권1호
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• pp.89-93
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• 2000

The study was conducted to investigate the characteristics of peach vinegar by parallel-complex fermentations. The vinegars prepared by using Changbnag-Chosang and Yumung peach cultivars added with 7, 10, and 13% sugaring concentrations were examined. The rate of increase in alcohol degree and titratable acidity, and that of decrease in soluble solids showed higher at Yumyung peach than at Changbang-chosang. Alcohol and acetic acid fermentation by paralle-complex fermentation were performed better in Yumyung peach than Changbang -chosang. but the fermentation of Yumyung showed active alcohol fermentation in the early stage, and active acetic acetic acid fermentation in the late stage. Quality of the vinegar prepared with Yumyung peach was better than that of Changbang-chosang, which were evaluated by acetic acid contents , peach taste and odor in the vinegar, and overall taste. The fermentation was accelerated with an increase in sugaring , concentrating but overall taste was best in 10 % sugaring.

• 한국통신학회논문지
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• 제13권6호
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• pp.370-479
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• 1988

GRAFCET로 기술된 병렬 시퀀스를 갖는 순서논리 시스템을 실현하는 microprogrammable sequential controller의 실현방법을 제시했다. 제시된 콘트롤러는 처리속도 및 가변성의 향상과 ROM 프로그래밍을 용이하게 할 수 있도록 구성되었다. 또한 병렬 시퀀스를 처리할 수 있으므로 제어시스템의 효율을 향상시킬 수 있다. 따라서 많은 입출력 변수를 갖는 industial process나 빠른 처리속도를 요하는 power electronic converter등의 콘트롤러 실현에 적합하다.

• 한국통신학회논문지
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• 제13권6호
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• pp.470-470
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• 1988

GRAFCET로 기술된 병렬 시퀀스를 갖는 순서논리 시스템을 실현하는 microprogrammable sequential controller의 실현방법을 제시했다. 제시된 콘트롤러는 처리속도 및 가변성의 향상과 ROM 프로그래밍을 용이하게 할 수 있도록 구성되었다. 또한 병렬 시퀀스를 처리할 수 있으므로 제어시스템의 효율을 향상시킬 수 있다. 따라서 많은 입출력 변수를 갖는 industial process나 빠른 처리속도를 요하는 power electronic converter등의 콘트롤러 실현에 적합하다.

• 대한기계학회논문집B
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• 제21권8호
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• pp.1024-1033
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• 1997

The past several years have witnessed an ever-increasing acceptance and adoption of parallel processing, both for high performance scientific computing as well as for more general purpose applications. Furthermore with increasing needs to perform the complex flow calculations in an efficient manner, the use of the message passing model on distributed networks has emerged as an important alternative to the expensive supercomputers. This work attempts to provide a generic framework to enable the parallelization of all CFD-related works using the master-slave model. This framework consists of (1) input geometry, (2) domain decomposition, (3) grid generation, (4) flow computations, (5) flow visualization, and (6) output display as the sequential components, but performs computations for (2) to (5) in parallel on the workstation clustering. The flow computations are parallized by having multiple copies of the flow-code to solve a PDE on different spatial regions on different processors, while their flow data are exchanged across the region boundaries, and the solution is time-stepped. The Parallel Virtual Machine (PVM) is used for distributed communication in this work.