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A Genetic Algorithm and Discrete-Event Simulation Approach to the Dynamic Scheduling
윤상한(Sanghan Yoon),이종환(Jonghwan Lee),정관영(Gwan-Young Jung),이현수(Hyunsoo Lee),위도영(Doyeong Wie),정지용(Jiyong Jeong),서영복(Yeongbok Seo) 한국산업경영시스템학회 2013 한국산업경영시스템학회지 Vol.36 No.4
This study develops a dynamic scheduling model for parallel machine scheduling problem based on genetic algorithm (GA). GA combined with discrete event simulation to minimize the makespan and verifies the effectiveness of the developed model. This research consists of two stages. In the first stage, work sequence will be generated using GA, and the second stage developed work schedule applied to a real work area to verify that it could be executed in real work environment and remove the overlapping work, which causes bottleneck and long lead time. If not, go back to the first stage and develop another schedule until satisfied. Small size problem was experimented and suggested a reasonable schedule within limited resources. As a result of this research, work efficiency is increased, cycle time is decreased, and due date is satisfied within existed resources.
Yoon, Sejun,Seo, Yu-Seong,Lee, Seokbae,Weiss, Jeremy D,Jiang, Jianyi,Oh, MyeongJun,Lee, Jongmin,Seo, Sehun,Jo, Youn Jung,Hellstrom, Eric E,Hwang, Jungseek,Lee, Sanghan IOP 2017 Superconductor science & technology Vol.30 No.3
<P>We investigated the superconducting transition temperature (<I>T</I> <SUB>c</SUB>), critical current density (<I>J</I> <SUB>c</SUB>) and optical properties of optimally doped Ba(Fe<SUB>0.95</SUB>Ni<SUB>0.05</SUB>)<SUB>2</SUB>As<SUB>2</SUB> (Ni-Ba122) single-crystalline epitaxial thin films grown by pulsed laser deposition for the first time. The <I>T</I> <SUB>c</SUB> at zero resistivity was about 20.5 K and the <I>J</I> <SUB>c</SUB> at self-field and 4.2 K was 2.8 MA cm<SUP>−2</SUP> calculated by the Bean model. The superconducting properties such as <I>T</I> <SUB>c</SUB> and <I>J</I> <SUB>c</SUB> of thin films are comparable to those of bulk single-crystal samples. The superfluid plasma frequency (<I>λ</I> <SUB>p,S</SUB>) of Ni-Ba122 thin film is ∼7033 cm<SUP>−1</SUP> obtained by optical spectroscopic technique. Based on this plasma frequency, we obtained the London penetration depth (<I>λ</I> <SUB>L</SUB>), ∼226 nm at 8 K, which is comparable to those of optimally Co- and K-doped BaFe<SUB>2</SUB>As<SUB>2</SUB> single crystals.</P>
우선부품목록 선정방안 제시 및 공용화 검색 시스템 구축
윤재복 ( Yoon¸ Jaebok ),김시옥 ( Kim¸ Siok ),문진규 ( Moon¸ Jinkyu ),홍성민 ( Hong¸ Sungmin ),임호정 ( Lim Hojung ),김상한 ( Kim¸ Sanghan ) 한국품질경영학회 2020 품질경영학회지 Vol.48 No.4
Purpose: The purpose of this study is to present a preferred parts list, establish a search tool for common parts, and propose a development plan for parts management. Methods: When selecting the preferred parts list, the weight of the selection of the military parts and the online site of the civilian parts were taken into account. By establishing a database of selected preferred parts list, we have established a system for searching common parts. Results: The results of this study are as follows; In order to establish parts management work in Korea's defense, it is necessary to improve the Defense Acquisition Program Act, Enforcement Decree (Rules), and the Regulations for Defense Acquisition Program Administration. Development of performance indicators for parts management is required, and establishment of procedures and standards for selection of preferred parts lists is required. Considerations for the selection of preferred parts list include whether they are used a lot in civilian products, whether they are used a lot, whether they are certified suppliers, whether they are national and industrial standard products, whether they perform well considering reliability, durability, and quality, and whether they can be supplied continuously. Conclusion: It is necessary to establish policies and systems related to parts management and to establish criteria for selecting preferred parts list for the development of domestic parts management tasks.
Jonghwan Lee,Sanghan Yoon,Jung-ho Lee,Sang-Jung Kim,Min-Suk Byon,Moon-Soo Kwon,Se-in Jang 한국산업경영시스템학회 2014 한국산업경영시스템학회 학술대회 Vol.2014 No.춘계
본 연구는 대구경북의 중소기업을 대상으로 전략유형과 성과관리시스템이 경영성과에 미치는 영향에 대한 연구를 통해 중소기업에 적합한 전략유형을 알아보고 그에 맞는 성과관리시스템의 설계를 통해 기업의 경영성과를 개선하고자 하였다. 연구결과 전략유형 중에서 기술혁신형과 생산중점형은 경영성과에 유의적인 영향을 미치는 것으로 나타났으며, 성과관리시스템은 재무적성과와 비재무적성과에 부분적으로 영향을 미치는 것으로 나타났다. 또한 전략유형과 성과관리시스템의 상호작용은 기술혁신형 기업의 경영성과에 유의적인 영향을 미치는 것으로 나타났다. 이러한 결과는 중소기업들이 전략유형에 맞는 성과관리시스템의 구축을 통해 경영성과를 향상 시킬 수 있음을 지지하고, 이를 통해 기업들은 자원의 제약과 무한 경쟁을 이겨내고 지속적인 성장을 할 수 있을 것으로 보인다. The purpose of this study is to whether management strategy types are archived improving the organizational performance and strategic performance management system are makes a significant influence on the organizational performance. Another objective is to identify whether the interaction between management strategy types and strategic performance management system makes a significant influence on the organizational performance. The results of this study indicate that diversity performance measures(strategy types) are effect partially presented on the firm's performances. And, firms which have the higher using diversity performance measures(strategy types) are achieve the higher firm's performances than lower using firm's(strategy types). And, the interaction of Management strategy types and diversity performance measures are effect partially presented on the firm's performances.