• 한국컴퓨터정보학회논문지
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• 제26권4호
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• pp.113-118
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• 2021

본 논문은 케미컬 탱커시장의 운임예측에 관하여 인공신경망을 적용하였으며 전통적인 시계열 모델인 ARIMA모형과 비교하였다. 케미컬 시장의 경우 상대적으로 소규모이나 범용성이 높은 선박을 이용한 시장으로 수급모델을 활용하여 운임시장을 분석하기 어려우며, 운임의 변동성이 크기 때문에 선형모형을 활용하는데는 한계가 있다. 본 연구는 케미컬 시장의 특성을 고려하여 비선형 모델인 인공신경망을 이용하여 ARIMA와 비교한 결과 RMSE와 Correlation 측면에서 예측성능이 우수함을 보였으며, 케미컬 탱커의 운임예측에 더 적합함을 보였다. 본 연구는 운임거래에 있어 과학적 모델을 제시함으로써 의사결정의 질을 제고하는데 기여할 뿐만 아니라 학문적으로 소외되어온 케미컬 시장 연구에 도움이 될 것으로 기대된다.

• Journal of Information Science Theory and Practice
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• 제10권spc호
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• pp.39-45
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• 2022

For national industrial development in the Fourth Industrial Revolution, it is necessary to provide researchers with appropriate job information. This can be achieved by interconnecting the National Science and Technology Standard Classification System used for management of research activity with the Korean Employment Classification of Occupations used for job information management. In the present study, an automatic linkage model of classification systems is introduced based on a pre-trained language model for interconnecting science and technology information with job information. We propose for the first time an automatic model for linkage of classification systems. Our model effectively maps similar classes between the National Science & Technology Standard Classification System and Korean Employment Classification of Occupations. Moreover, the model increases interconnection performance by considering hierarchical features of classification systems. Experimental results show that precision and recall of the proposed model are about 0.82 and 0.84, respectively.

• 한국컴퓨터정보학회논문지
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• 제19권2호
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• pp.39-48
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• 2014

본 논문에서는 아무런 불편함이 없이 사람이 하루 중 가장 많은 시간을 보내는 침대에서 사람 동작의 관찰을 가능하게 하는 비침습식 센서 시스템을 제안한다. 제안된 센서 시스템은 얇고 넓은 필름 형태의 압전센서, 신호처리 보드, 그리고 데이터 수집 프로그램으로 구성된다. 사람 동작에 따라 힘이 가해진 압전 센서는 전압 신호를 생성하게 되고, 이 신호는 제안 시스템에 의해 수집, 전처리, 변환된다. 최종 단계에서 FFT 결과는 k-NN 분류기에 의해 식별된다. 침대에서 10,000개 사람 동작을 식별하는 실험을 수행하였고, 약 89.4%의 정인식률을 달성하였다. 실험 결과는 제안된 시스템이 침대를 사용하는 사람이 정상인인지 중풍환자인지 식별할 능력이 있음을 시사한다. 본 논문의 성과는 침대 사용자의 동작을 지속적으로 관찰 가능하게 한다는 점이다. 이러한 지속적인 관찰은 동작 또는 수면 패턴에서 건강상 이상 징후를 탐지하는데 매우 유용하게 활용될 것이다.

• 대한인간공학회지
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• 제29권5호
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• pp.751-762
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• 2010

The purpose of this study was to investigate the job stress factors of aircraft composite material part manufacturing workers using survey based on 'Job stress factors evaluation tool for Koreans' that was developed by KOSHA in 2003. Two hundred and fifty workers participated in this study, and among them 204 responses were analyzed for this study due to the unreliability and insincerity of responses. The eight job stress factors which are physical environment, job autonomy, job insecurity, organizational system, workplace culture, unfair compensation, relationship conflict, and job requirement were analyzed. The results showed that the stress level of the six job stress factors which are physical environment, job autonomy, job insecurity, organizational system, workplace culture, unfair compensation was relatively higher than that of other industry workers. Generally, all eight job stress factors showed higher stress with temporary workers than with permanent workers, and especially job autonomy, job insecurity, organizational system, and unfair compensation factors showed statistically significant differences (p<0.05). Since the temporary workers are insecure with their job, weak position in organization, having little self-control for the job and lower pay level than that of permanent workers though the job is as same as permanent workers', the stress level of above job stress factors would be much higher than that of the other factors. The group of unsatisfactory with workplace showed higher job stress than group of satisfactory with workplace in all job stress factors, as expected, at the statistically significance level (p<0.05). From the results of this study, the work loss due to the job stress could be prevented, and accurate stress factors could be removed at the workplace. Also the job stress management program can be implemented to improve the work efficiency and the workers' quality of life.

• 한국생활과학회지
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• 제20권3호
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• pp.651-663
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• 2011

The purpose of this study was to provide basic data and information for the improvement of school foodservice and efficient management of cooks by surveying the working conditions and the job satisfaction of cooks at schools located in Chungbuk province. The questionnaires of 311 cooks were available for this study. 26.3% of respondents worked at elementary schools, 34.2% of respondents worked at middle schools, and 39.5% of respondents worked at high schools. 72.3% of them were in their forties, 24.4% worked during five to seven years, and 63.0% had qualification certificates. Their job satisfaction was examined from ten dimensions. Respondents were not satisfied with the wage system and working environment which scored 2 points out of 5 points(not satisfied). They gave 1 point out of 5 points to the promotion dimension(not satisfied at all) while organizational committment area received relatively high points. The overall job satisfaction level was 3.06 points. The evaluation of the factors that made their job unsatisfactory were evaluated and the bonus system, treatment system and the wage system were 3.80 points, 3.69 points, and 3.62 points, respectively. In order to improve the job satisfaction of school foodservice employees, a change of the wage system and welfare system are needed.

• 지능정보연구
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• 제10권3호
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• pp.115-132
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• 2004

최근 기업들이 고객관계관리의 중요성을 인식함에 따라 고객에 대한 이해의 필요성이 증대되고 있다. 고객의 직업은 고객을 이해하는데 있어서 매우 중요한 정보이다. 하지만 대부분의 고객들이 자신의 직업을 노출하는 것을 꺼리기 때문에 기업에게 그들의 직업을 알려주지 않는 것이 다반사이고, 심지어는 잘못된 직업을 알려주기도 한다. 본 연구의 대상은 이동통신서비스 업체이다. 본 연구에서 우리는 통화상세이력 데이터를 이용하여 고객의 직업을 판정하는 모델을 구축하였다. 인공신경망을 이용해서 우리는 두 단계로 이루어진 직업판정 모델을 구축하였다. 첫번째 단계에서는 먼저 4개의 직업군을 판정하였고, 두 번째 단계에서 이 4개의 직업군을 세분하여 총 7개의 직업을 판정하였다. 이러한 방식으로 7개의 직업을 판정한 모델의 최종적중률은 $71.9\%$이었다.

• 산업경영시스템학회지
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• 제29권4호
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• pp.107-112
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• 2006

This study presents the new dispatching rules for improving performance measures of job shop scheduling related to completion time and due dates. The proposed dispatching rule considers information, which includes the comparison value of job workload, work remaining, operation time, and operation due dates. Through computer experiments, the performance of the new dispatching rules is compared and analyzed with the existing rules. The results provide a guidance for the researchers to develop new dispatching rules and for practitioners to choose rules of job shop scheduling.

• 한국임상보건과학회지
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• 제6권2호
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• pp.1126-1135
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• 2018

Purpose. The purpose of this study is to investigate the success model related to the hospital information system accomplishment. It is important to examine the success model of the hospital information system and to analyze the factors affecting the job satisfaction accomplishment. Methods. The method of this study is to 150 copies of the entire survey data were distributed and 135 copies were collected, showing a collection rate of 90%. In order to ensure the reliability of the questionnaire items, Cronbach's Alpha was used to test reliability, and exploratory factor analysis was conducted to determine the convergence of various items. In order to grasp the convergence of various items, exploratory factor analysis was performed. The results of exploratory factor analysis were used to analyze the correlations between variables that were proven to have a single dimensionality before calculating factor loadings and regression analysis by Orthogonal Rotation by Varimax method Results. The results of this study, first, the system quality of the hospital information system has a statistically significant effect on user satisfaction. Second, the information quality of hospital information system is statistically significant for user satisfaction, indicating that information quality improves user satisfaction. Third, service quality of hospital information system was statistically significant in user satisfaction. Finally, the higher the satisfaction of the users who use the hospital information system, the higher the accomplishment of the organization Conclusions. This study is based on the successful model of D & M information system. In addition, the hospital information system, the user satisfaction, and the organizational accomplishment in connection with it can be found significant.

• 한국도서관정보학회지
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• 제10권
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• pp.157-191
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• 1983

The purpose of the study is to build a general cost a counting model for university libraries, to clarify the possible areas of its a n.0, pplication by employing job cost accounting and process cost accounting methods. System analysis is performed as to the fields of acquisition, processing (cataloging & classification), and book shelving system. The existing operation processes and time required for each operation of these three systems are analyzed, from which detailed system flowcharts were drawn and job descriptions and the content of job were identified. The results of the study can be summarized as follows: (1) The processing time of one book in each systems: Oriental books. a. Acquisition system. the time required the time required in case of job cost case of job cost accounting after purchasing, 8 min. 21 sec. the time required in case of process cost accounting 15 min. 7 sec. b. Processing system. the time required for non-duplicate, 34 min. 40 sec. the time required for duplicate, 8 min. 49 sec. the time required for purchasing of more than the time required two copies at a time. 4 min. 44 sec. c. Book shelving system. the time required. 1 min. 43 sec. Western books. a. Acquisition system the required in case of job cost accounting, 9 min. 1 sec. the time required in case of process cost accounting. 15 min. 7 sec. b. Processing system. the time required for non-duplicate, 32 min. 58 sec. the time required for duplicate, 9 min. 26 sec. the time required for purchasing of more than two copies at a time. 5 min. 33 sec. c. Book shelving system. the time required. 1 min. 43 sec. (2) Total sum of processing time and processing cost per book. Oriental books (including material cost) the time required. cost. a. non-duplicate, 51 min. 30 sec. 2, 791 won b. duplicate, 25 min. 39 sec. 1, 580 won c. purchasing of more than two copies as a time, 21 min. 34 sec. 1, 368 won Western books(including material cost) a. non-duplicate, 49 min. 48 sec. 3, 189 won b. duplicate, 26 min. 16 sec. 1, 846 won c. purchasing of more than two copies at a time. 22 min. 23 sec. 1, 388 won

• International Journal of Contents
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• 제13권2호
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• pp.35-43
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• 2017

This study sought to measure the influence of HIMs' work environment changes on job stress, and to explore measures for improving job satisfaction among them. A total of 275 hospital HIMs' were surveyed using a structured questionnaire. Significant job stress impact variables were sorted out using a simple linear regression analysis. Then, through multiple linear regression analysis, multicollinearity was tested. Significant impact factors were identified from among the control variables, and job stress impact was measured. The survey revealed that in public hospitals where the EMR system has been implemented for a longer period, depression scores in HIMs' were increased. HIMs' job stress level was found to be affected by the following factors: computerization of their working environment, experience of depression, unemployment, and manpower reduction, as well as, their lifestyles, including leisure activities. The results of this study suggest that HIMs' job stress can be reduced through work environment improvement and improvement of their personal lifestyle habits.