• Nuclear Engineering and Technology
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• 제50권4호
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• pp.613-618
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• 2018

We are developing a shared remote control mobile robot for aerial work in nuclear power plants (NPPs); a robot consists of a mobile platform, a telescopic mast, and a dual-arm slave with a working tool. It is used at a high location operating the manual operation mechanism of a fuel changer of a heavy water NPP. The robot system can cut/weld a pipe remotely in the case of an emergency or during the dismantling of the NPP. Owing to the challenging control mission considering limited human operator cognitive capability, some remote tasks require a shared control scheme, which demands systematic software design and integration. Therefore, we designed the architecture of the software systematically.

• 국제학술발표논문집
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• The 5th International Conference on Construction Engineering and Project Management
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• pp.359-366
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• 2013

Although many research efforts have been conducted to address the effect of crew members' work skills (e.g., technical and planning skills) on work performance (e.g., work duration and quality) in construction projects, the relationship between skill and performance has generated a great deal of controversy in the field of management (Inkpen and Crossan 1995). This controversy can lead to under- or over-estimations of the overall project schedule, and can make it difficult for project managers to implement appropriate managerial policies for enhancing project performance. To address this issue, the following aspects need to be considered: (a) work performances are determined not only by individual-level work skill but also by the group-level work skill affected by work team members, each member's role, and any working behavior pattern; (b) work planning has significant effects on to what extent work skill enhances performance; and (c) different types of activities in construction require different types of work, skill, and team composition. This research, therefore, develops a system dynamics (SD) model to analyze the effects of both individual-and group-level (i.e., multi-level) skill on performances by utilizing the advantages of SD in capturing a feedback process and state changes, especially in human factors (e.g., attitude, ability, and behavior). The model incorporates: (a) a multi-level skill evolution and relevant behavior development mechanism within a work group; (b) the interaction among work planning, a crew's skill-learning, skill manifestation, and performances; and (c) the different work characteristics of each activity. This model can be utilized to implement appropriate work planning (e.g., work scope and work schedule) and crew management policies (e.g., work team composition and decision of each worker's role) with an awareness of crew's skill and work performance. Understanding the different characteristics of each activity can also support project managers in applying strategic work planning and crew management for a corresponding activity, which may enhance each activity's performance, as well as the overall project performance.

• 문화기술의 융합
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• 제6권4호
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• pp.411-417
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• 2020

본 연구는 대학생이 지각하는 팀 프로젝트 기반 학습법에 대한 유용성과 학습만족도 간의 관계를 규명하고 지각된 자율성, 협력적 효능감, 인지된 상호작용성이 지각된 유용성에 미치는 효과를 탐색하였다. 이를 위해 경기도 소재 대학생 55명이 한 학기 동안 팀 프로젝트 기반 학습을 완료 후 설문조사에 참여하였다. 본 연구의 결과는 다음과 같다. 첫째, 팀 프로젝트 기반 학습법에 대해 지각된 유용성이 높을수록 학습만족도가 높게 나타났다. 둘째, 지각된 자율성과 협력적 효능감을 높게 인식할 때 학습법에 대한 지각된 유용성을 높게 인식하였다. 이와 같은 연구결과는 대학의 팀 프로젝트 기반 학습법 설계 시 학습자가 학습법이 효율적이고 유용하다고 느끼게 하는 것이 중요하며 이를 위해 자율성을 지지하는 환경조성과 학습자가 협력하여 공동의 목표를 성취할 수 있는 능력을 충분히 갖췄다고 느낄 수 있는 전략이 필요함을 시사한다.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2005년도 학술발표회(1)
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• pp.390-391
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• 2005

• 한국콘텐츠학회논문지
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• 제9권7호
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• pp.352-360
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• 2009

본 연구는 셀프리더십이 팀웍과 직무만족, 조직몰입에 미치는 영향을 밝히는 것이다. 조사 및 분석을 위하여 2008년 10월 1일부터 25일까지 서울에 위치한 특급 호텔의 wine & dining에 근무하고 있는 직원들을 대상으로 420부의 설문을 배포하였으며 그 중 356부를 분석에 사용하였다. 연구 결과 셀프리더십의 행위중심적 전략과 자연보상 전략은 팀웍에 유의한 영향을 미쳤고, 팀웍은 직무만족과 조직몰입에 유의한 영향을 미쳤다. 반면에 건설적 사고 패턴 전략은 팀원에 어떠한 영향도 미치지 않았다. 본 연구의 시사점은 특급호텔 wine & dining에 근무하고 있는 직원들에게 셀프리더십에 대한 교육을 진행한다면 직원들의 셀프리더십이 증진되며, 직원만족과 조직몰입에 긍정적 효과를 미칠 수 있다는 것이다. 또한 이는 궁극적으로 고객만족에 긍정적 영향을 미친다고 할 수 있다.

• 열처리공학회지
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• 제18권1호
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• pp.18-23
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• 2005

Effect of cold rolling on microstructural changes has been investigated for a Zn-15%Al alloy to elucidate the reason for its work softening behavior. Fully annealed microstructure of the Zn-15%Al alloy is characterized by ${\eta}$ grains and (${\eta}+{\alpha}$) lamellar colonies, where ${\eta}$ and ${\alpha}$ are Zn-rich HCP and Al-rich FCC phases, respectively. The hardness decreases continuously with increasing cold rolling degree, exhibiting work softening behavior. It is revealed that during the cold rolling, (${\eta}+{\alpha}$) lamellar colonies gradually change into equiaxed ${\eta}$ and ${\alpha}$ grains due to dynamic recrystallization at room temperature, while pre-existing ${\eta}$ grains are only deformed without recrystallization. Furthermore, cold rolling causes the precipitation of dissolved Al solutes in ${\eta}$ grains. In view of these results, change of (${\eta}+{\alpha}$) phases from lamellar to equiaxed morphology, which results in structural softness and increase in equiaxed ${\eta}/{\alpha}$ grain boundaries with higher mobility, and deterioration of solution hardening by precipitation of Al solutes from ${\eta}$ grains, are thought to contribute to the work softening of Zn-15%Al alloy.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2009년도 제7회 압연 심포지엄
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• pp.65-71
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• 2009

The process of cold rolling is becoming more severe with the increase in the production of high tensile steel strip as a result of increased demand. Consequently, there is a need to develop work roll materials with better resistance to wear and roll failure. DOOSAN has developed an improved in-house 5%Cr alloy, New HSR1, with properties superior to the existing in- house 5%Cr alloy, Old HSR1. Test alloys were designed with controlled amounts of Si and Mn based on Old HSR1 and an optimum alloy was chosen based on thermal shock tests. A prototype work roll was manufactured with New HSR1, and properties of test specimens were evaluated. The results indicated that New HSR1 has better properties than Old HSR1. After application of New HSR1 work rolls, productivity increased due to advanced resistance to wear and roll failure.

• Journal of Welding and Joining
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• 제24권5호
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• pp.62-66
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• 2006

Panel line is an important process occupying the largest work amount in shipbuilding. In this research product simulation has been carried out to establish the optimal production scheduling. For this purpose a web-based panel line simulator was developed using an object modeling technology and C# language. The balance of work-load and increase in the productivity by the improvement of production facilities and process are the key factors for a good scheduling. In this study SPRT(Shortest Remaining Process Time) rule was applied for the work-load balancing and a good result achieved. To increase the productivity in the stiffener welding stage which is a bottleneck; process, more welding heads and higher welding speed were tested using the developed simulator. The simulation results showed that either more welding head or higher welding speed decreased the total work time. Use of both, however, deteriorated the productivity because of the bottleneck in the following stage. This result points out that the improvement of production facilities and/or process should be evaluated with their influences on the leading and following processing stage.

• The Journal of Korean Physical Therapy
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• 제12권1호
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• pp.79-86
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• 2000

The purpose of this study was analyse the necessity for the Scam work at home care service. The subjects of the study were 14 home m nurses who work in community and in physical ana 16 physical therapist. The data were collected from Sep. 1 to Dec. 31, 1999. The result were analysed statistically by $X^2$, t-test. The main results of this study were as follows : 1. There were statistical significances of the general characteristics between the physical therapists and the home care nurses, 2. There were statistical significances of currencies of the home us service which the subjects experienced. 3. There were no statistical significances of the necessity of team work and the participation in home care service. 4. Regarding the effects of expectation which consisted 9 items, there were statistical significances in 8 items.

• 한국컴퓨터정보학회논문지
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• 제18권2호
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• pp.141-147
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• 2013

비즈니스 교육 현장에서 학생들의 팀 활동은 매우 흔한 현상이 되었다. 그러나 팀 활동에 대한 학생들의 사회적 태만과 무임승차 현상은 교수자에게 있어서 해결하기 어려운 문제로 남는다. 이에 본 연구는 '넌 해고야' 방식을 우리 대학의 비즈니스 교육 현장에 해당 방식을 적용해보고, 실질적 효과가 있는지 활용가능성을 검증하였다. '넌 해고야' 방식은 2단계를 거쳐 팀 프로젝트 활동을 실시하는 수업에 간단하게 적용할 수 있다. 팀원들은 팀 활동에 참여하지 않는 무임승차자에 대한 구체적 내용을 이메일로 당사자와 교수자에게 동시에 보내 공식적으로 경고하고, 이후에도 팀 참여 활동이 수정되지 않으면 두 번째 이메일로 팀에서 해고시킬 수 있다. 총 257명의 학부 학생을 대상으로 '넌 해고야' 방식의 실질적 효과를 검증한 결과, 무임승차를 방지하고 팀 활동 참여와 학습 동기를 촉진하는 효과적인 기제로 활용될 수 있음이 밝혀졌다.