• Journal of Korean Society of Occupational and Environmental Hygiene
• /
• v.33 no.3
• /
• pp.375-383
• /
• 2023

Objectives: Coal-fired power plants feature diverse working conditions, including multi-layered employment structures and irregular work cycles due to outsourcing and non-standardized tasks. The current uniform occupational environment measurement systems have limitations in accurately assessing and evaluating these varied conditions. This study aims to propose alternative measurement and assessment strategies to supplement existing methods. Methods: Major domestic coal-fired power plants were selected as the study targets. To prepare for the study and establish strategies, work processes were identified and existing occupational environment measurement results were compared and analyzed. The study proceeded by employing three strategies: specific exposure groups (SEGs) measurement, continuous monitoring, and supplementary measurements, which were then compared and discussed. Results: Previous exposure index evaluations (5,268 cases) indicated that crystalline silica, a type of respirable particulate matter, had detection limits below the threshold (non-detectable) in 82.6% (4,349 cases) of instances. Exposures below 10% of the exposure limit were observed at a very low concentration of 96.1%. Similar exposure group measurements yielded results where detection limits were below the threshold in 38.2% of cases, and exposures below 10% of the limit were observed in 70.6%. Continuous monitoring indicated detection limits below the threshold in 12.6% of cases, and exposures below 10% of the limit were observed in 75.6%. Instances requiring active workplace management accounted for more than 30% of cases, with SEGs at 11.8% (four cases), showing a higher proportion compared to 3.0% (four cases) in continuous monitoring. For coal dust, exposures below 10% of the limit were highest in legal measurements at 90.2% (113 cases), followed by 74.0% (91 cases) in continuous monitoring, and 47.0% (16 cases) in SEGs. Instances exceeding 30% were most prevalent in SEGs at 14.7% (five cases), followed by legal measurements at 5.0% (eight cases), and continuous monitoring at 2.4% (three cases). When examining exposure levels through arithmetic means, crystalline silica was found to be 104.7% higher in SEGs at 0.0088 mg/m³ compared to 0.0043 mg/m³ in continuous monitoring. Coal dust measurements were highest in SEGs at 0.1247 mg/m³, followed by 0.1224 mg/m³ in legal measurements, and 0.0935 mg/m³ in continuous monitoring. Conclusions: Strategies involving SEGs measurement and continuous monitoring can enhance measurement reliability in environments with irregular work processes and frequent fluctuations in working conditions, as observed in coal-fired power plants. These strategies reduce the likelihood of omitting or underestimating processes and enhance measurement accuracy. In particular, a significant reduction in detection limits below the threshold for crystalline silica was observed. Supplementary measurements can identify worker exposure characteristics, uncover potential risks in blind spots of management, and provide a complementary method for legal measurements.

• The Journal of Society for e-Business Studies
• /
• v.6 no.3
• /
• pp.149-161
• /
• 2001

Construction and engineering is one of the world largest industry. Yet, it Is one of the most inefficiently operated industry. Since buildings are not constructed by mass production, construction projects usually require intense communication and collaboration between participants, who are usually widely dispersed. That is the main reason for the inefficiency. eWorks21 that we developed in this research, is a project management system that can improve communication and collaboration among project participants using the Internet. eWorks21 can reduce project life-cycle, costs, and increase revenue, resource utilization, controls, transparency, and competitiveness, which will eventually provide infrastructure for knowledge management of construction projects. In this research, we classified currently available project collaboration systems, and analyzed the benefits gained by using project collaboration systems. Then we describe the implementation of eWorks21, and discuss employment and utilization strategies of project collaboration systems.

• Korean Journal of Child Studies
• /
• v.30 no.2
• /
• pp.57-69
• /
• 2009

Instruments used in this study were the Peer Competence Scale(Park & Rhee, 2001), Infant Temperament Questionnaire(Chun, 1993), Emotional Intelligence Quotient Scale(Kim & Kim, 1998), Maternal Parenting Scale(Park & Lee, 1990) Parental Involvement Checklist(Cohen, 1989), and Student-Teacher Relationship Scale(Pianta, 1991). Subjects were 400 preschoolers and their mothers in Seoul. Data were analyzed by descriptive statistics, Pearson's correlation, and multiple regression analysis. Results indicated that (a) children of employed mothers had higher peer competence than children of unemployed mothers. (b) Closeness in teacher-child relationship was the strongest predictor for peer competence of children of employed mothers; maternal strategies promoting peer relationships was the strongest predictor for peer competence of children of unemployed mothers.

• Journal of the Korean Society of Safety
• /
• v.13 no.2
• /
• pp.145-150
• /
• 1998

The production activity by human is accompanied by various accidents which resulted in human and property loss. If information on these industrial accidents could be collected and analyzed for the purpose of preventing industrial accidents, we would be able to get rid of industrial accidents. The accidents which involved absence from work at least 4 days in small manufacturing factories were considered in this study. 84 accidents which occurred in 1995 were investigated. These accidents were analyzed in terms of employment sector, work period, cause of accident and form of accident. The accidents of small manufacturing factories are numerous and are often serious and worthy of greater attention than they have received. Successful strategies for accident prevention depend on effective analysis.

• Journal of the Korean BIBLIA Society for library and Information Science
• /
• v.10 no.1
• /
• pp.137-161
• /
• 1999

Business information system should utilize the provided various information services from information resources： namely, the improvement of business information can be achieved by the establishment of an business information center and by the employment of qualified librarians. Therefore. employers may get effective management and operation on theirs business when their adoption of innovative technologies, management strategies and information services are combined together. Especially, the information services they can get through Internet. prompt decision making adoption of new policies, flexible organization of business management and innovation of technology will be the core factors.

• Proceedings of the ESK Conference
• /
• 1997.10a
• /
• pp.205-213
• /
• 1997

The production activity by human is accompanied by various accidents which resulted in human and property loss. If information on these industrial accidents can be collected and analyzed for the purpose of preventing industrial accidents, we sill be able to get ride of inductrial accidents. The accidents which involved absence from work at least 4 days in small manufacturing factories were considered in this study. 84 accidents which occurred in 1996 were investigated. These accidents were analyzed in terms of employment sector, work period, cause of accident and form of acciednt. The accidents of small manufacturing factories are numerous and are often serious and worthy of greater attention than they have received. Successful strategies for accident prevention depend on effective analysis.

• Korea Journal of Hospital Management
• /
• v.16 no.1
• /
• pp.10-26
• /
• 2011

This study attempted to develop the directions for developing customized health tourism programs of Gangwon province. The data was collected by telephone surveys for 500 citizens in a metropolitan and regional cities in Korea in 2009. In conclusion, the province has many advantages to develop health tourism industries because the image of Gangwon health tour was represented to be generally positive and more than 65% of respondents were interested in participating health tourism of the province. The respondents also considered that the purpose of the tour is for relaxation rather than medical treatments. However, it requires flexible seasonal employment, scientific investigations of the natural environmental treatments and connectionwithleisureactivities, also need to collaborated with health and hospital services.

• Journal of Korean Society for Quality Management
• /
• v.39 no.2
• /
• pp.188-198
• /
• 2011

The purpose of this research is to identify the effect of quality circles activities upon quality circles performance and business performance. Empirical results indicate that quality circle activities influence on quality circles performance in both individual and enterprise level, Quality circles performance influences on not employment satisfaction but customer satisfaction, business performance (profitability and market values) of companies with quality circles is higher than that of companies without quality circles. In conclusion, quality circle activities influence on quality circles performance that effect on business performance.

• Journal of the Korean Ceramic Society
• /
• v.56 no.1
• /
• pp.1-23
• /
• 2019

Dielectric materials with inherently high power densities and fast discharge rates are particularly suitable for pulsed power capacitors. The ongoing multifaceted efforts on developing these capacitors are focused on improving their energy density and storage efficiency, as well as ensuring their reliable operation over long periods, including under harsh environments. This review article summarizes the studies that have been conducted to date on the development of high-performance dielectric ceramics for employment in pulsed power capacitors. The energy storage characteristics of various lead-based and lead-free ceramics belonging to linear and nonlinear dielectrics are discussed. Various strategies such as mechanical confinement, self-confinement, core-shell structuring, glass incorporation, chemical modifications, and special sintering routes have been adopted to tailor the electrical properties and energy storage performances of dielectric ceramics. In addition, this review article highlights the challenges and opportunities associated with the development of pulsed power capacitors.

• 중국학논총
• /
• no.67
• /
• pp.157-177
• /
• 2020

The rapid change in the university environment due to the decrease in the school-age population calls for enhancing the competitiveness of China-related departments. In this paper, the university's competitiveness and dropout rate were studied in combination with various factors such as geographical location of Chinese-related departments set up at national universities, convergence with other departments, competition rate for entrance exams, scholarships, and employment rate that have a comprehensive impact on student satisfaction. In particular, the dropout rate presented research results that could help universities strengthen their competitiveness in China-related departments, such as by differentiating customized academic strategies according to the atmosphere of elimination through multiple regression analysis and quantile analysis. We hope this thesis will be the basis for policymaking and judgment in China-related departments.