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단부효과에 의한 PMLSM의 디텐트력 저감을 위한 보조코어 최적설계
장기봉(Jang Ki-Bong),안호진(An Ho-Jin),김규탁(Kim Gyu-Tak) 대한전기학회 2010 전기학회논문지 Vol.59 No.3
There are produced the detent force caused by slot-teeth structures, end-effect and parallel magnetization of permanent magnet in permanent magnet linear synchronous motor. In this paper, we proposed to establish the auxiliary core for reducing detent force which is generated the discontinuity of magnetic circuits by end effect. The optimal design of the auxiliary core used a finite element analysis and design of experiment. To demonstrate the validity of the paper, the experiment results are compared with analysis ones.
장기성(Ki Sung Jang) 언어과학회 2010 언어과학연구 Vol.55 No.-
This study aims to analyze word order constraints for German binomial idioms with a focus on phonetico-phonological constraints according to the principle of Cooper/Ross. Using the results, the investigator was able to set the degree among the overall principles that rule word orders for German binomial idioms. In addition, a comparison between German and English in terms of constraints shed light onto commonalities and differences in quantitative and qualitative constraints between the two languages. The cross-linguistics results between them also showed an overall similar distribution in constraints, which primarily proves that the principle of Cooper/Ross universality. In short, the percentage degrees of the individual principles in German according to the principle of Cooper/ Ross were as follows: A phonetico-phonological analysis is focused on the degree of constraints and hierarchies exercised upon the word order of binomial idioms by such principles as, P, C1, V, F, C2, C3, Cp. In β>a, P(94.7%), C1(86.8), V(73.7%), F(65.8%), C2(71.4%), C3 (72.9%), Cp(86.8%). In β>a, P(37.6%), C1(18.4), V(45.5%), F(36.8%), C2(36.8%), C3(39.l%), Cp(27.8%). The word order constraints of German and English were close to each other within 10% across all the principles except for Cp in case of β>a and V in case of β>a, which proves that the two languages share a very similar mechanism of word order constraints. Those results indicate that phonetico-phonological principle of Cooper/ Ross has significance as a principle and can be regarded as a linguistically universal principle. (Catholic University of Daegu)
Myrinet 대역폭 향상을 위한 채널 본딩 기반 VI-GM 통신 모듈 개발
장기성 ( Gi-sung Jang ),김상형 ( Sang-hyong Kim ),최현호 ( Hyun-ho Choi ),유원경 ( Weon-kyung Yoo ),유관종 ( Kwan-jong Yoo ) 한국정보처리학회 2007 한국정보처리학회 학술대회논문집 Vol.14 No.1
클러스터 파일 시스템의 성능은 노드 내부 연산의 성능 뿐만 아니라 노드간의 통신 성능이 전체 시스템의 성능에 큰 영향을 미친다. 최근의 클러스터 파일 시스템에는 Myrinet, ServerNet, QNet, SCI(Scalable Coherent Interface) 등의 고속 인터페이스를 통해 연결하는 것이 일반화되어 있다 본 논문에서는 노드간의 통신 성능을 높이기 위해서 Myrinet 환경에서 제공해 주는 사용자 수준의 통신 프로토콜인 VI-GM(Virtual Interface Architecture over GM)을 사용하여 2개 이상의 네트워크 장치를 하나처럼 보이게 해서 Redundancy와 대역폭을 증가시키는 채널 본딩 기법을 기반으로 통신 모듈을 개발하였다. 그리고 성능 실험을 통해 제안된 모듈의 우수함을 보였다.