• 품질경영학회지
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• 제45권3호
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• pp.365-377
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• 2017

Purpose: In the A rotorcraft, the division of a long yaw control rod was studied to improve the heat treatment capability. The purpose of this study was to analyze whether division of yaw control rod affects quality reliability in the A rotorcraft and analyze whether it secured flight safety. Methods: The structural static test and the vibration durability test on the split shape of yaw control rod were carried out in order to examine and verify the existing structural analysis results. Results: Structural static test results showed that there were no cracks and vibration durability test results showed that there was no damage or breakage on the split yaw control rod. Conclusion: This study showed that the quality reliability was confirmed and thus the flight safety of the A rotorcraft was secured. And it is expected that the split technique of the yaw control rod will contribute to the development of the rotorcraft industry in the future.

• 한국관개배수논문집
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• 제19권1호
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• pp.19-29
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• 2012

The data of the agricultural water quality survey network was analyzed between from 1990 to 2010 in order to propose effective plans for water quality management by analyzing the characteristics of agricultural lakes and the change of water quality. The result of the analysis shows that there is a correlation between water quality and items that can be a function of water depth such as dam height, dam length, dam height/dam length ratio and active storage/surface area of lake ratio. This means that, Korean agricultural lakes, there is a correlation between water quality and water depth. Water quality of the lakes that have lower than 5m of active storage/surface area of lake ratio (effective water depth) especially tends to get worse rapidly. The Chl-a and COD concentration of Korean agricultural lakes have a tendency to increase between June and September. Therefore, we recommend first taking a water quality improvement project for the lakes preformed watershed management project, and taking a preventive short-term water quality improvement project for the unperformed lakes before June among lakes that have lower than 5m of effective water depth.

• International Journal of Quality Innovation
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• 제6권2호
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• pp.147-166
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• 2005

The purpose of this study is to analyze the causal relationship, in the perspective of Total Quality Management, among the education quality factors, which were suggested in the previous researches. Lee et al. [16] had tried to analyze the relationship among education factors, but they did not estimate the education factor using latent variable concept, which is very reasonable and efficient to represent the constructed concepts. So this study attempts to analyze the causal relationship among education quality factors, represented as latent variables used in structural equation modeling (SEM), and compared with each other. In this study, education quality factors were measured by several measures, constructed as several latent variables, and then processed with AMOS, the most efficient statistical package in the SEM area. In order to analyze the causal relationship among the education quality factors constructed as latent variables, this study designed the structural equation model with suggested factors and established several research hypotheses. This study discovered a prominent causality among the education quality factors, such as education leadership, student scholastic performance and satisfaction of education quality, which is similar to that of previous research. This outcome is really a unique Korean syndrome manifest within our educational career orientation.

• 대한영양사협회학술지
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• 제16권3호
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• pp.208-225
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• 2010

Our research consisted of a qualitative study investigating the quality attributes of university foodservices through focus group interviews and a quantitative study evaluating service quality of university foodservices through a survey. Sixteen quality attributes were derived and customer satisfaction questionnaires included these 16 quality attributes with a five-point Likert scale. An Importance-Performance Analysis (IPA) model was applied in order to identify operational strategies necessary to improve service quality. The survey questionnaires were distributed to 600 university students enrolled in a university located in Kwangju and statistical analysis was performed on 555 surveys using an SPSS package. Overall customer satisfaction with the quality of university foodservices was relatively low (under 3.0) while the expectation was inclined to be high (over 4.0). The main reasons for using the university foodservice were given as inexpensive price (67.6%) and time saving (22.9%). A factor analysis of 16 quality attributes revealed two separate factors: food quality (Cronbach's alpha=0.911) and service quality (Cronbach's alpha=0.934). Variety of menu, convenient location, and sanitation of utensils and facilities were identified by an IPA model as factors needing improvement in operational strategies.

• 한국직업건강간호학회지
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• 제23권4호
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• pp.235-244
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• 2014

Purpose: The purpose of this study was to identify quality of sleep and its influencing factor among middle-aged male workers. Methods: The subjects of this study were 411 middle-aged male workers living in Seoul and Gyeonggi-do. The data were based from self-reported using structured questionnaires asking about low urinary tract symptoms, circadian rhythm, quality of life and sleep quality including general characteristics. The data were collected from September 11 to October 31, 2013 and analyzed by t-test, one-way ANOVA, Pearson correlation coefficient and hierarchical regression. Results: Mean score of the sleep quality was $5.03{\pm}2.57$ (range: 0~21) and reported as bad sleep quality in 55.7%. Low urinary tract symptoms (${\beta}$=.30, p<.001), circadian rhythm (${\beta}$=-.17, p<.001), quality of life (${\beta}$=-.14, p<.001) were shown as significant association of sleep quality. Conclusion: Strategies to improve sleep quality in middle-aged male workers are necessary and nursing intervention should be developed to improve education program for prevention and management of low urinary tract symptoms. It is also necessary to legalize the institutional devices to upgrade work environment and to place regulations on overtime at work places in order for these workers to obtain sufficient sleep time for recovery of biological rhythms and improving sleep quality.

• 한국의료질향상학회지
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• 제5권1호
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• pp.76-91
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• 1998

Background : The purpose of this study was to understand general attitudes of physicians toward hospital quality improvement activities who have been members of QA committee in 32 Korean university hospitals. Methods : A postal survey about opinions of hospital quality improvement activities and desirable policy directions was sent to 328 QA committee member physicians. The questionnaires were composed of 48 items. In total 152 physicians responded to this survey(response rate: 49.3%). This study was carried out from January to February 1996. Results : Most physicians(97.5%) recognized the necessity of hospital QA activities. The most dominant supporting reason for quality activities was to improve clinical outcome. Two thirds of physicians regarded their own hospital activities for quality improvement as inactive. They considered that the obstacles were too little concern(33.6%), unclear objectives(28.9%), lack of human resources(14.3%), and insufficient education and training for quality improvement(10.1%). The most favoring policy among respondents was to give health care providers economic incentives. Provision of education and training for implementing quality improvement was the next to it. Physicians revealed their preferences for professional society, government, health insurance societies, consumer groups, hospital labor unions, and mass media in sequence as sponsoring agencies for hospital accreditation program. Conclusion : These study suggested that the concrete means for motivating physicians and promoting constructive partnership among related parties should be developed in order to activate current hospital quality activities in Korea.

• Industrial Engineering and Management Systems
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• 제13권2호
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• pp.231-249
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• 2014

This paper discusses a green supply chain with a manufacturer and a collection trader, and it proposes an optimal production planning for remanufacturing of parts in used products with quality classification errors made by the collection trader. When a manufacturer accepts an order for parts from a retailer and procures used products from a collection trader, the collection trader might have some quality classification errors due to the lack of equipment or expert knowledge regarding quality classification. After procurement of used products, the manufacturer inspects if there are any classification errors. If errors are detected, the manufacturer reclassifies the misclassified (overestimated) used products at a cost. Accordingly, the manufacturer decides to remanufacture from the higher-quality used products based on a remanufacturing ratio or produce parts from new materials. This paper develops a mathematical model to find how quality classification errors affect the optimal decisions for a lower limit of procurement quality of used products and a remanufacturing ratio under the lower limit and the expected profit of the manufacturer. Numerical analysis investigates how quality of used products, the reclassification cost and the remanufacturing cost of used products affect the optimal production planning and the expected profit of a manufacturer.

• 한국지능정보시스템학회:학술대회논문집
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• 한국지능정보시스템학회 2001년도 The Pacific Aisan Confrence On Intelligent Systems 2001
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• pp.352-357
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• 2001

This study presents an analysis of healthcare quality indicators using data mining for developing quality improvement strategies. Specifically, important factors influencing the inpatient mortality were identified using a decision tree method for data mining based on 8,405 patients who were discharged from the study hospital during the period of December 1, 2000 and January 31, 2001. Important factors for the inpatient mortality were length of stay, disease classes, discharge departments, and age groups. The optimum range of target group in inpatient healthcare quality indicators were identified from the gains chart. In addition, a decision support system was developed to analyze and monitor trends of quality indicators using Visual Basic 6.0. Guidelines and tutorial for quality improvement activities were also included in the system. In the future, other quality indicators should be analyze to effectively support a hospital-wide continuous quality improvement (CQI) activity and the decision support system should be well integrated with the hospital OCS (Order Communication System) to support concurrent review.

• 동서간호학연구지
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• 제29권1호
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• pp.15-23
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• 2023

Purpose: The purpose of this study was to identify the effect of sleep quality, rehabilitation motivation, depression, and anxiety on quality of life in occupational accident patients. Methods: The participants were 138 patients who in and outpatient treatment at a hospital affiliated with the Korea Workers' Compensation and Welfare-service Hospital located in Daegu and Daejeon. Data were analyzed by independent t-test, ANOVA, Scheffé test, Pearson's correlation coefficients, and hierarchical multiple regression analysis using SPSS/WIN 25.0 program. Results: Quality of life had a significant negative correlation with sleep quality, depression, and anxiety, respectively, but had a significant positive correlation with rehabilitation motivation. Hierarchical multiple regression analysis showed that anxiety was a major factor affecting the quality of life of occupational accident patients. Anxiety showed 42.7% of explanatory power for the quality of life of occupational accident patients. Conclusion: Based on the results of this study, in order to improve the quality of life of patients with occupational accidents, psychological interventions for anxiety should be provided first in the early stage of treatment.

• 한국건축시공학회지
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• 제5권3호
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• pp.117-124
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• 2005

Quality management in construction industry becomes more significant under the existing conditions such as, increasing higher demand caused by the high value of real estate and extension of the warranty period. Therefore, this study presents the alternative idea related to the current quality management conditions of small and medium construction companies, including the difficulties and problems in qualify management, in order to develop the systematical method for the quality management in small and medium construction company.