• 한국산학기술학회:학술대회논문집
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• 한국산학기술학회 2009년도 춘계학술발표논문집
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• pp.458-460
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• 2009

The parameters of PID controller should be readjusted whenever system character change. In spite of a rapid development of control theory, this work needs much time and effort of expert. In this paper, to resolve this defect, after the sample of parameters in the changeable limits of system character is obtained, these parametrs are used as desired values of back propagation learning algorithm, also neural network auto tuner for PID controller is proposed by determing the optimum structure of neural network. Simulation results demonstrate that auto-tuning proper to system character can work well.

• The Journal of Asian Finance, Economics and Business
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• 제8권12호
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• pp.541-551
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• 2021

One of the most important aspects of any firm is to motivate its employees to go the extra mile. In order to do work properly, people must be motivated. The total effectiveness and efficiency of workers, as well as a company's performance, is directly related to the degree of motivation of those who work there. On the other hand, demotivated personnel do not put much effort and, when they get a better opportunity, leave their places of employment. For Survey, this study used online Google forms to collect data from September 2021 to October 2021. The target demographic for the research was those who worked for Lebanon's private businesses. The poll was conducted in English, the second language of Lebanon. Furthermore, 179 workers (N = 179) were utilized for this research. The research suggests that fun events and support for fun managers enable workers to connect informally and help people know each other better, creating an environment that promotes friendship building. Based on these connected reasons, fun activities and the support of managers for fun are considerably linked to turnover.

• 동서간호학연구지
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• 제28권1호
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• pp.1-9
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• 2022

Purpose: This descriptive research was conducted to identify the effects of work complexity, role conflict, knowledge of traditional Korean (Hanbang) nursing, and grit on the job satisfaction among traditional Korean nurses. Methods: The survey was conducted from September 7, 2020 to February 10, 2021 on 155 Hanbang nurses. Data were analyzed by t-test, one way ANOVA, Pearson's correlation coefficient, and multiple linear regression with the SPSS statistics 26.0 program. Result: The factors affecting job satisfaction of Hanbang nurses were work complexity, knowledge of Hanbang nursing, age, and experience in traditional Korean medicine hospitals. Conclusions: It is necessary to promote Hanbang nursing related education in regular and clinical area in order to improve the job satisfaction of Hanbang nurses. In addition, an organizational effort is required to increase long-term job satisfaction.

• 치위생과학회지
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• 제20권3호
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• pp.163-170
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• 2020

Background: Job satisfaction of dental hygienists has been discussed continuously in dental hygiene research. It has been the most representative performance variable in dental and human resource management. However, in quantitative research, most of the studies have analyzed the causal relationship with variables related to dental hygienists' job satisfaction. The existing qualitative research contains only the studies that targeted dental hygienists with an experience of more than 10 years. The present study aimed to understand and to characterize the job satisfaction of dental hygienists with an experience of 2 to 10 years and to compare it with the qualitative research on dental hygienists with an experience of 10 or more years. Methods: An in-depth interview of dental hygienists with 2 to 10 years of experience working in 10 dental clinics was conducted. For data analysis, Giorgi's analysis method was used. Results: After analyzing the meaning of job satisfaction of dental hygienists, 180 semantic words and 19 subcategories were derived. The results of the interview were categorized into for central meanings: recognition and rewards, work experience and ability improvement, occupational characteristics, and work characteristics. Recognition and rewards included workplace recognition, patient recognition, self-effort and recognition, and the feeling of being rewarded. Work experience and ability improvement included various work experiences and factors relates to improving the work ability. Occupational characteristics included professional job, interest and persistence, job extensibility, and no burden of employment. Work characteristics included working conditions and separation of work and private life. Conclusion: The development of tools to measure the level of dental hygienists' job satisfaction after long-term service and to conduct follow-up research regarding ways and effects to improve job satisfaction is needed.

• 한국건설관리학회논문집
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• 제6권6호
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• pp.181-192
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• 2005

건설 프로젝트의 단위작업을 기반으로 발생되는 노무자의 작업시간은 진행된 실적물량 정보와 연계되어 생산성 정보로 가공되고 이는 다시 해당 단위작업의 공정관리와 연계됨으로써 프로젝트의 계획 대비 실적을 비교 및 분석할 수 있는 근거자료로 활용 될 수 있다. 또한 이러한 작업정보(노무자의 작업시간 및 실적물량 정보)는 잔여 작업 일정에 대한 예측 및 작업조 운영계획 조정 등 공정관리와 관련된 다양한 원천데이터로 제공될 수 있으며, 실적자료로 축적되어 향후 유사 프로젝트의 공사계획 수립에 유용하게 재활용될 수 있다. 본 연구의 목적은 PDA, 바코드, 웹 기술 등을 활용하여 단위작업을 기반으로 발생되는 작업정보를 효과적으로 수집하고 이를 생산성 정보로 가공하여 공정 및 공사관리 업무를 지원하는 전산화 시스템을 개발하는 것이다. 개발 시스템을 통해 분석 및 축적된 생산성 정보는 단위작업의 공정과 연계되어 잔여작업 일정 예측 및 작업조 조정 등 다양한 공정 지원데이터를 제공할 수 있으며 지식관리 차원에서 향후 유사 프로젝트의 공정계획 수립시 매우 유용한 참고자료로 활용될 수 있을 것으로 기대된다.

• 한국산업보건학회지
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• 제5권1호
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• pp.87-103
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• 1995

Since being granted permission for self-assessment of the work environment by the Department of Labor in 1992, POSCO's Industrial Hygiene Laboratory has participated in domestic and Foreign Quality Control Programs 8 times and has obtained remarkable results. It has made a lot of effort to be a proficient laboratory with the ability to observe and analyse environmental monitoring data. The summary of results is as follows: 1. POSCO's Industrial Hygiene Laboratory has received a "P(Proficient)" grade from the round 115 to round 119 of AIHA/NIOSH PAT Program for analysis of such metals as lead, cadmium, zinc, and chromium, and also has received a "P(Proficient)" grade from its round 119 of for organic solvent analysis, i,e,. Trichloroethylene(TCE), Carbon Tetr-achloride(CTC), 1,2-Dichloroethane(DCE), 1,1,1-Trichloroethane(MCM), Tetrachloroethylene (PCE), Chloroform(CFM), Benzene(BNZ), toluene(TOL), and O-xylene(OXY). 2. In the Quality Control Evaluation Program performed by the Industrial Health Research Institute,Korea Industrial Safety Corporation, POSCO has passed impressively in the3-metal analysis test for lead, cadmium, cupper, and in the 6 organic solvent analysis test for Benzene(BNZ), toluene(TOL), O-xylene(OXY), Trichloroethylene(TCE) and Methyl isobutyl keton(MIBK), n-Hexane with 2 standard deviations. These analytic techniques should be practically applied to various fields, and reliable results of environmental monitoring should be considered to improve the work environment and to keep workers from occupation related diseases.

• Annals of Occupational and Environmental Medicine
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• 제34권
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• pp.36.1-36.12
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• 2022

Background: Many studies have been conducted to investigate the harmful effect of shift work on physical and mental health. Although, by definition, "working evening shift" is included in the scope of shift work, most related studies conducted thus far have focused on working night shifts, overtime work, or different types of shift work, with little research effort dedicated to "working evening shifts." Therefore, to fill this research gap, we investigated the effect of working evening shifts on workers' mental health. Methods: The participants of this study were 16,692 employees of the 50,205 that participated in the 5th wave of the Korean Working Conditions Survey. We performed χ² test and logistic regression analysis to analyze the effects of independent variables on health problems and calculated odds ratios and 95% confidence intervals (CIs). Results: In the logistic regression analysis adjusted for sociodemographic characteristics, health-related factors, and work-related characteristics, employees who worked evening shifts showed higher levels of depression and anxiety compared to those that did not. In particular, the adjusted odds ratios of the group working evening shifts between one and nine times a month were the highest with 2.723 (95% CI: 2.014-3.682) for depression, 3.294 (95% CI: 2.547-4.259) for anxiety. Conclusions: The results of our study suggest that working evening shifts has a negative effect on employees' mental health. This trend decreased with an increase in the monthly frequency of evening work.

• 인지과학
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• 제23권1호
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• pp.25-46
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• 2012

우리는 단조로운 과제를 할 때 종종 그만두고 싶은 충동을 느낀다. 이러한 중단 충동은 그 일을 얼마나 오래동안 해 왔는지(시간적 요인) 또는 수행하는 과제의 특정요소(사건 기반 요인)에 따라 달라진다. 이 연구에서는 스트룹 과제와 작업기억과제를 사용하여 시간적 요인(반복)과 사건 기반 요인(인지적 충돌)의 함수로서의 중단 충동의 변화를 살펴보았다. 최소작업의 법칙을 비롯한 최신 이론과 마찬가지로 기억 과제에서 중단 충동은 어려운 시행 다음에 더욱 큰 것으로 나타난 반면, 스트룹 과제에서는 반응이 비효율적인 시기인 수행의 초기(초심자) 단계에서만 일치 시행보다 불일치 시행 다음에 중단 충동이 더 큰 것으로 나타났다. 이는 인지적 갈등에 대한 회피반응임을 입증하는 결과이다. 시간적 측면에서 보면 중단 충동은 초기 단계보다 후기 단계에서 더 컸다. 이러한 연구 결과는 만족 지연에 관여하는 비교적 강렬한 동기적 노력의 본질을 명확하게 설명하고 있다.

• 한국병원경영학회지
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• 제8권4호
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• pp.26-58
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• 2003

This research first finds out the resources, activities, and effectiveness of quality management effort and the resulting customer satisfaction when the total quality management is lacking in most Korean medical agencies today. Then, it analyzes the relationship among the factors mentioned earlier. This paper utilizes actual data and presents a theoretical model which explains that the resources of quality management affect the activities and that the fruit of the quality management effort benefits the customers in the end. In addition, this study conducts a corroborative analysis through executing a survey, getting a descriptive statistical result on the subjects' characteristics and the research variables using SPSS 9.0 WIN PROGRAM, and the model is approved through analyzing its make-up using LISREL 8.12 WIN PROGRAM. The study's finding is the following: First, the management leadership affects the worker's, educational training, the quality of medical service, and the survey of customer satisfaction positively. However, it does not affect the quality of work positively. Second, the internal customer satisfaction affects the worker's participation, educational training, the quality of medical service, and the survey of customer satisfaction positively. Third, the quality of medical service and the survey of customer satisfaction affects the result of quality management positively, but the worker's participation, educational training, and the quality of work do not affect the result of quality management positively. Fourth, the management leadership does not appear to affect the result of quality management positively. Fifth, the internal quality management appears to affect the result of quality management positively. Sixth, the external customer satisfaction appears to affect the result of quality management positively. In conclusion, the findings in this study indicate that medical agencies need to utilize the active variables of quality management in order to successfully establish a total quality management.

• 한국지역사회생활과학회지
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• 제26권4호
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• pp.647-659
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• 2015

This study analyzes current technologies in personal protective equipment (PPE) and mechanisms that can be used in the agricultural field to provide data for research and development on PPE for farmers. There is growing awareness of the importance of PPE as part of efforts to reduce agricultural accidents, but data remain rare for developing PPE tailored to the farm work environment. In this regard, patent data on PPE can provide useful insights for facilitating relevant technologies and research. This study examines patents and utility models classified under the IPC code in Korea and other countries to analyze patented technologies and recent trends for the period from January 2003 to October 2014. Here Korea, the U.S., Japan, and Europe were considered. The results show that the number of patent applications for PPE remained steady without any sharp fluctuations. KIPO applications accounted for 43.5% of all cases, reflecting the highest proportion among the countries considered. Domestic applicants accounted for 94% of all cases. In Korea, patent applications were concentrated in safety gear for the face and eyes, indicating a high level of technology. The highest level of competition was observed for safety goggles in all countries. Some PPE technologies were dominated by a particular manufacturer. The analysis results for farming-related technologies show the current state of technologies and areas lacking technological development. This study analyzes patented technologies for PPE in Korea and other countries and recent research trends as part of the effort to develop PPE for workers in the farming and livestock industry. This study represents an early-stage effort to develop PPE for workers in the farming and livestock industry, and the results are expected to be useful for tailoring PPE to Korea's farming and livestock environment.