• 실천공학교육논문지
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• 제15권3호
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• pp.671-679
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• 2023

본 연구는 일학습병행 학습기업 평가지표 개발의 후속연구로 평가지표를 정량화하여 평가모형을 정립하는데 그 목적이 있다. 선행연구에서 도출된 최상위 레벨의 구성요소인 학습기업의 정량적요인, 정성적요인, 전담인력역량요인, 그리고 학 습근로자 역량 요인을 주축으로 2레벨 구성요소를 검증하여 평가모델을 구축하였다. 학습기업의 평가를 위해 해당기업을 담당하고있는 전문 가들과 AHP 설문을 수행하여 기업현장 교육훈련의 질을 결정하는 중요요인을 도출하고 평가항목간의 가중치산정을 통하여 학습기업의 평가모형을 완성하고 등급별 그룹핑을 진행하였다. 일 학습병행은 산업현장과 학교교육의 미스매치를 해소하고 능력중심 사회를 구현하기 위한 핵심적인 정책으로 추진되어 2022년 12월 기준으로 16,664개 기업이 훈련에 참여하였다. 학습기업은 현장훈련을 실시하는 교육훈련 공급기관으로써 매우 중요한 역할을 수행하고 있다. 본 연구에서 제시된 평가모형에 따른 학습기업 등급별 지원 및 컨설팅방안이 일학습병행의 내실화와 질적수준을 향상하는 기초자료로 활용될 것을 기대한다.

• 한국수소및신에너지학회논문집
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• 제22권6호
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• pp.868-877
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• 2011

This paper presents a parallel computing methodology for polymer electrolyte fuel cells (PEFCs) and detailed simulation contours of a real-scale fuel cell. In this work, a three-dimensional two-phase PEFC model is applied to a large-scale 200 $cm^2$ fuel cell geometry that requires roughly 13.5 million grid points based on grid-independence study. For parallel computing, the large-scale computational domain is decomposed into 12 sub-domains and parallel simulations are carried out using 12 processors of 2.53 GHz Intel core i7 and 48GB RECC DDR3-1333. The work represents the first attempt to parallelize a two-phase PEFC code and illustrate two-phase contours in a representative industrial cell.

• 제어로봇시스템학회논문지
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• 제12권10호
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• pp.1035-1043
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• 2006

In this study, a translational 3-DOF parallel mechanism formed by constraining the Stewart Platform Mechanism is investigated. The translational 3-DOF parallel mechanism has three struts(3-UPS type serial subchains) and in addition, has a PPP type serial subchain in the middle of the mechanism. Firstly, the closed-form forward and reverse position solutions are derived for this mechanism. And analysis on kinematic characteristics using isotropic index of the Jacobian is conducted to examine effects of design parameters for the mechanism. Lastly, a prototype mechanism is implemented and the kinematic performance of the translational 3-DOF parallel mechanism was verified through experimental work.

• Journal of Information Processing Systems
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• 제13권1호
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• pp.104-113
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• 2017

In this paper, we present an approach to transmit data from the source to the destination through a minimal path (least-cost path) in a computer network of n nodes. The motivation behind our approach is to address the problem of finding a minimal path between the source and destination. From the work we have studied, we found that a Steiner tree with bounded Steiner vertices offers a good solution. A novel algorithm to construct a Steiner tree with vertices and bounded Steiner vertices is proposed in this paper. The algorithm finds a path from each source to each destination at a minimum cost and minimum number of Steiner vertices. We propose both the sequential and parallel versions. We also conducted a comparative study of sequential and parallel versions based on time complexity, which proved that parallel implementation is more efficient than sequential.

• 반도체디스플레이기술학회지
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• 제15권2호
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• pp.20-25
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• 2016

The parallel computer cluster system has been known as the powerful tool to solve a complex physical phenomenon numerically. The numerical analysis of large size of Li-ion battery pack, which has a complex physical phenomenon, requires a large amount of computing time. In this study, the numerical analyses were conducted for comparing the computing efficiency between the single workstation and the parallel cluster system both with multicore CPUs'. The result shows that the parallel cluster system took the time 80 times faster than the single work station for the same battery pack model. The performance of cluster system was increased linearly with more CPU cores being increased.

• 실천공학교육논문지
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• 제11권1호
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• pp.51-59
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• 2019

대학연계형 일학습병행제를 운영하는 계약학과 입장에서 NCS기반자격과 과정평가형 자격 모두를 수용할 수 있는 교과 편성이 가능한가에 대한 연구로 두 자격 간 주요내용과 차이점을 비교 분석한다. 기계설계 직무중에서 과정평가형 자격으로 공고된 기계설계기사 사례 분석을 통하여 양측 자격의 편성 기준에 부합하는 교과과정을 개발하였고 향후 운영상의 문제점을 예측하고 극복방안을 제시한다. 또한 일학습병행제와 과정평가형을 연계하여 운영하는 전문 교육기관으로 공급자 중심의 교육훈련과 수요자 중심 기술 자격의 격차를 최소화하고 학습근로자의 학업 성과를 극대화 하기 위한 현장주도 교육과정 편성이 용이하도록 몇가지 방안을 제안한다.

• 한국정밀공학회지
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• 제20권7호
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• pp.70-77
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• 2003

The centerless through-feed grinding is performed by passing the workpiece between the grinding wheel and the regulating wheel. So, the amount of removed material around the leading end, of the workpiece is always more than that around the trailing end until the leading end leaves the grinding wheel. Because of this, there are differences in diameters along the workpiece axis during grinding, and workpiece axis is not parallel to the grinding wheel axis and the contact lines between the workpiece and wheels. Thus the ground workpiece shows tapering error inherently. To eliminate this error, the workpiece axis must be kept to be parallel to the grinding wheel axis. And, the direction of the workpiece axis can be controlled by the work-rest blade. Therefore, the effects of work-rest blade inclination angle on the through-feed centerless ground part are investigated in this study. As a result, it is found that there is a positive inclination angle of the work-rest blade for minimizing the tapering error of a ground workpiece.

• 한국정보시스템학회지:정보시스템연구
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• 제31권2호
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• pp.19-43
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• 2022

Purpose Due to the COVID-19 pandemic, many companies are building virtual workplaces based on virtual reality technology. Through this study, we intend to identify the trend of convergence and convergence research between virtual reality technology and work space, and suggest future promising fields based on this. Design/methodology/approach For this purpose, 12,250 bibliographic data of research papers related to Virtual Reality (VR) and Workplace were collected from Scopus from 1982 to 2021. The bibliographic data of the collected papers were analyzed using Text Mining and Pathfinder Network, Parallel Neighbor Clustering, Nearest Neighbor Centrality, and Triangle Betweenness Centrality. Through this, the relationship between keywords by period was identified, and network analysis and visualization work were performed for virtual reality-based workplace research. Findings Through this study, it is expected that the main keyword knowledge structure flow of virtual reality-based workplace convergence research can be identified, and the relationship between keywords can be identified to provide a major measure for designing directions in subsequent studies.

• 한국가시화정보학회:학술대회논문집
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• 한국가시화정보학회 2004년도 추계학술대회 논문집
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• pp.72-75
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• 2004

The present study describes a computational work to investigate detailed behaviors of the twin shock waves discharged from the exits of two-parallel ducts. In computations, the Yee-Roe-Davis's TVD scheme was used to solve the unsteady, three-dimensional, inviscid, compressible, Euler equations. The distance between two ducts is varied and the Mach number of the incident shock wave is changed below 2.0. The results obtained show that on the symmetric axis between two-parallel ducts, the maximum pressure achieved by the merge of twin shock waves and its location strongly depend upon the distance between two-parallel ducts and the Mach number of the incident shock wave. It is also found that the twin shock waves discharged from the exits of two-parallel ducts leads to the complicated flow fields, such as Mach stem, spherical waves, and vertical structures.

• 실천공학교육논문지
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• 제11권2호
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• pp.181-193
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• 2019

기업현장교사는 회사 내 일학습병행에 참여하고 있는 도제 및 고숙련 학습근로자에게 고도화된 훈련 지도 및 평가자로서의 역할을 수행하므로 심화된 이론과 기술, 풍부한 경험과 문제해결 능력이 요구된다. 본 연구는 양질의 기업현장교사 양성을 위한 한국의 학위연계형 고숙련마이스터 과정을 소개하고, 최적화된 표준 교과 모델을 제시하였다. 이는 고숙련마이스터 양성과 관련된 최초의 실증적 연구로서, 일학습병행제 고숙련마이스터 양성에 기여함은 물론 안정적인 고숙련마이스터 과정의 제도적 정착 및 활성화에 크게 기여할 것으로 사료된다.