• 한국항공운항학회지
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• 제11권1호
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• pp.27-40
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• 2003

For the flight education, it needs a lot of money. Most of people become airline transportation pilots after completing a course. Therefore it is important to select superior students who adapt themselves to flight for flying education. At present, students who have a good high school record and SAT(Scholastic Aptitude Test) are chosen, and educated at Hankuk aviation university, department of aeronautical science and flight operation. This research studies the professor's recognition of the relationship between practical flight skills and high school record, university grades, and SAT grades.. On this analysis result, there are significant differences between belonging education, completion and work experience.

• 대한전기학회논문지:시스템및제어부문D
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• 제52권9호
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• pp.533-539
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• 2003

Reinforcement learning (RL) has been widely used as a learning mechanism of an artificial life system. However, RL usually suffers from slow convergence to the optimum state-action sequence or a sequence of stimulus-response (SR) behaviors, and may not correctly work in non-Markov processes. In this paper, first, to cope with slow-convergence problem, if some state-action pairs are considered as disturbance for optimum sequence, then they no to be eliminated in long-term memory (LTM), where such disturbances are found by a shortest path-finding algorithm. This process is shown to let the system get an enhanced learning speed. Second, to partly solve a non-Markov problem, if a stimulus is frequently met in a searching-process, then the stimulus will be classified as a sequential percept for a non-Markov hidden state. And thus, a correct behavior for a non-Markov hidden state can be learned as in a Markov environment. To show the validity of our proposed learning technologies, several simulation result j will be illustrated.

• 산업공학
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• 제22권1호
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• pp.10-16
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• 2009

In this paper, we propose an efficient search algorithm for finding an optimal schedule to minimize makespan, while avoiding deadlock situation in Flexible Manufacturing Systems (FMS) with finite capacity, in which each job needs to be processed in several job stages for completion. The proposed algorithm uses a modeling and control method based on Petri-net. Especially, we improve the efficiency of the search algorithm by using a priority rule and an efficient bounding function during the search procedure. The performance of the proposed algorithm is evaluated through a numerical experiment, showing that it holds considerable promise for providing an optimal solution efficiently comparing to past work.

• 산업공학
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• 제12권1호
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• pp.121-131
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• 1999

In this article, a simulation model of a microwave oven assembly line is developed to identify system parameters to improve the system performances such as work-in-process inventories, production lead time, mean earliness, mean tardiness and in-time completion rate. System parameters investigated include dispatching rules, lot sizing, setup time reduction, demand increase, productivity improvement, production scheduling, hardware characteristics, etc. The model has been developed using SIMAN simulation language which has been demonstrated to be a powerful tool to simulate complex manufacturing systems. We have suggested the results obtained to improve the system performances of an existing production line.

• 경영과학
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• 제25권3호
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• pp.45-57
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• 2008

This paper considers a genetic algorithm for sequencing activities and allocating resources to reduce the over all completion time of workflow in the presence resource constraints. The algorithm provides an integrated solution for two sub-problems. The first is to decide the priority for the activities which require the same resource. The other problem is to select one among available resources for each activity by considering the incurred setup time and the performance factor of each resource. We evaluate the algorithm performance for three different kinds of workflows including parallel structures. Computational results show that the proposed algorithm is more effective than a previous work.

• 한국전자거래학회:학술대회논문집
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• 한국전자거래학회 2003년도 종합학술대회 논문집
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• pp.84-89
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• 2003

For running various construction processing information and technological information, it is supplied by Construction CALS/EC systems properly during whole facilities life cycle. So it is urgently necessary to change Regional Construction 8t Management Office (RCMO) equipment construction administration business to electron processing system (CALS/EC). From construction work plan to completion, a present storage documents system is unsystematic. Therefore, it needs management system to store documents and to read in turn documents properly. This research suggest that it is to connect with various information systems and Construction CALS/EC for RCMO which is running public construction field. So it can be driven systematic and effective administration system about public construction business by Web-based present construction situation information system.

• 한국인터넷방송통신학회논문지
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• 제20권6호
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• pp.93-99
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• 2020

건설공사에 있어 가설공사는 그 중요성에 비해 전체공사에 차지하는 공사 금액이 낮고 공사 완료 후에는 철거되므로 다른 공종에 비해 상대적으로 비중이 작게 취급 되는 공종이다. 실제 현장에 근무한 건설기술자들은 공사의 품질과 공사의 안전을 확보하기 위해 여러 공정중 가장 중요한 공종으로 가설공사의 안전을 이야기 한다. 하지만, 가설공사는 공사 진행에 따라 공사현장 여러곳에서 동시에 여러 종류의 가설재가 설치되고, 그것을 사용하여 본 공사가 진행되기 때문에 안전관리가 어려운 것도 사실이다. 건설공사의 안전사고는 거의 가설공사에서 이루어진다고 해도 크게 틀리지는 않는다. 최근 들어 건축물이 대형화, 다양한 복합용도, 대규모 지하공간의 굴착. 초고층으로 바뀌어가는 건설 추세로 보아 가설공사의 중요성과 안전성은 절대 소홀히 할 수 없다. 본 연구의 목적은 IT 기술을 이용하여 건설공사에서 사용되는 가설자재중 동바리의 안전 확보를 연구목적으로 하며 가설공사의 안전사고를 방지하는 안전관리를 제안 하고자 한다.

• 한국사회복지학
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• 제67권4호
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• pp.227-249
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• 2015

본 연구의 목적은 미국에 거주하고 있는 정신장애를 가진 아시아계 미국인과 미국계 백인의 직업의 의미와 중요성, 직장에서 받는 메시지 및 차별에 대한 차이를 알아보는 것을 목적으로 한다. 고용은 단기적으로나 장기적으로 정신장애인의 회복에 긍정적인 영향을 미친다. 비록 정신장애인의 회복과 고용관련 서비스와 직업의 의미에 대한 연구가 진행 되고 있지만 다른 인종에 비해 서비스의 참여율이 낮고 중도포기율이 높은 정신장애를 가진 아시아계 미국인을 대상으로 시행된 연구는 전무하다. 그렇기 때문에 정신장애를 가진 아시아계 미국인이 생각하는 직업의 의미와 사회나 직장에서 경험하는 차별에 대한 연구가 필요하다. 본 연구는 양적 연구와 질적 연구를 혼합하는 방식을 적용하였다. 설문지 개발을 위해 Millner(2015)가 실시한 정신장애인의 직업과 장애에 대한 연구결과와 9명의 정신장애인들이 인지인터뷰와 파일럿 테스트에 참여하여 개방형/폐쇄형 질문을 포함한 설문지가 개발되었다. 설문은 5월부터 8월까지 실시되어 총 91명의 정신장애인이 성공적으로 설문을 완료하였다. 양적 분석을 위해 t-test가 사용되었으며 개방형 질문은 연구자가 함께 분석하였다. 정신장애를 가진 아시아계 미국인은 미국계 백인보다 직업에 대한 높은 열망을 가지고 있으며 직장 내에서 소수인종과 정신장애라는 이중장벽을 경험하는 것으로 나타났다. 가족 혹은 서비스 제공자에게 고용과 관련하여 인종과 장애로 인한 사회적 차별을 경험하고 부정적인 메시지를 받은 것으로 나타났다. 직업 서비스 제공자들은 다문화 정신장애인의 특성과 직업의 의미, 이들이 실제로 경험하고 있는 이중장벽과 사회적 차별을 이해하고 이를 줄이기 위해 노력해야 할 것이다.

• 패션비즈니스
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• 제2권4호
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• pp.102-111
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• 1998

The purpose of this study is to present the basic material for the competitive, high-quality products by analyzing employees' attitude toward their job and some factors which influence the enhancement of productivity, education of workers, and facilities. This project was mainly conducted the conditions of women's wear manufacturing industries in Taegu by interviewing 143 employees in the sewing department. The result of this dissertation can be summarized as follows; 1. When it comes to the division of task in the sewing department, one team is composed of chairpersons (33.5%), assistant members (27.4%) and sub-assistant members (26.6%). The inspection of commodities as well as the enhancement of work on ironing for elaboration was divided as completion (12.6%) and finally the forms of task were made up of design sampling team (49%) and contracting team (51%). 2. Among the needle workers, as many as 60% employees had received technical education, which was by means of being passed down from the predecessors (81.6%). In terms of the period of education, from 2 to 5 years topped the list. The contents of education comprise patterning, sewing (65.2%) and ironing (20.3%). 3. The department of design takes charge of the report on working directions up to 88.2% and the working directions were used by 69.9 % of technicians. The directors of working conditions and methods were chiefs of designing department (37.7%) and those of sewing department (30.8%). The factors of defective goods were low-quality materials (50.0%), the deficiency in skills of workers. In terms of methods for preventing defects, technical education of workers, standardization of task and investment for factory automation were suggested. 4. As for their perception of present work, most of employees (80%) look upon it as a way of earning a living and 11% of them wanted to derive many things from their work. 59.2% of workers were satisfied with the product. When it comes to the incentive system provided by company, 67.0% responsed that it was not bad, and 23.9% evaluated it as 'satisfactory'.

• 대한두경부종양학회지
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• 제27권1호
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• pp.38-41
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• 2011

Background and Objectives : Although it is well established that patients with papillary thyroid microcarcinoma (PTMC) have a highly favorable prognosis, the extent of thyroid surgery for PTMC remains unclear. According to the 2011 revised Korean Thyroid Association guideline, the choice of surgical strategy(total thyroidectomy versus lobectomy) for PTMC depends on solely preoperative diagnostic scrutinies-ultrasonography and fine needle aspiration cytology. We want to know how accurately these preoperative diagnostic scrutinies define the choice of surgical strategy for PTMC. Materials and Methods : For 119 patients who underwent total thyroidectomy with central neck dissection for PTMC, retrospectively, we compared the choice of surgery according to preoperative work up and postoperative pathologic findings. Results : Overall accuracy of the choice of surgery by preoperative work up was 61%. Among patients recommended lobectomy on preoperative work up, completion thyroidectomy on postoperative pathology might be necessary for 60% of patients and hidden central node metastasis was revealed in 31% of patients. Conclusions : The results of this study compel us to reinvestigate the current treatment guideline for PTMC. On current guideline according to the sonography and fine needle aspiration cytology, it might be thought to be better to choose more aggressive surgical strategy.