• 한국대기환경학회지
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• 제29권4호
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• pp.378-389
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• 2013

In Korea, studies on the indoor air quality have been conducted since mid of 1980s. The turning point occurred in 2003 by establishing the act of the indoor air quality management for public facilities. According to the law, the basic plan for indoor air quality management is prepared by government every five years, affecting greatly governmental policy and related academia and industries. Indoor air quality survey was mostly carried out among indoor air quality researches. After then, assessment of health effect and air cleaning technology were studied. Although various control technologies for particle, bioaerosol, odor, and hazardous chemicals have been applied to indoor environments, breakthrough technologies are needed to solve real problems facing at the applied environments. In the future, issue of indoor air quality is more interested and both management policy and control technology are key factors in order to realize comfort and healthy indoor environments.

• 품질경영학회지
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• 제45권4호
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• pp.933-942
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• 2017

Purpose: The purpose of this paper is to evaluate the performance quality of the open source DBMSs. Performance quality is defined as processing time for Join queries. Query processing time is measured and compared in the most widely used open source DBMSs and commercial DBMS. Methods: By varying the number of tuples of two relations to be joined, the average processing time(seconds) of a Join query in each DBMS was obtained experimentally. ANOVA and Tukey HSD test were used in order to compare the performance quality of DBMSs. Results: There was a significant difference between the performance qualities of the three DBMSs at all experimental levels where the number of tuples was 100, 1,000, 2,000, 10,000, and 50,000. As a result of the Tukey HSD test, two open source DBMSs (MariaDB, MySQL) were classified in the same group only at the tuple level of 100. The commercial DBMS (MS-SQL Server) belonged to another group. At level of more than 1,000 tuples, all three DBMSs belonged to different groups. Conclusion: Within the open source DBMS group, MariaDB showed the better performance quality except for a small number of tuples. Thus the results show that MariaDB can be the alternative to MySQL which is currently most widely used. Between open source DBMS and commercial DBMS groups, MS-SQL Server always shows the best performance quality, but the less number of tuples, the less the difference.

• 환경영향평가
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• 제20권5호
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• pp.765-777
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• 2011

According to the total pollution load management system, exact prediction and analysis of water quality and discharge has been required in order to allocate the amount of pollution load to each local government. In this study, QUAL2E model was used for comparison with other water quality models and improve the inadequate to forecast future water quality. And Various calibration and verification methods were applied to deal with existing uncertainties of parameter during modeling water quality. For user convenience, A GUI(Graphical User Interface) system named "QL2-XP" model is developed by object-oriented language for the user convenience and practical usage. Suggested GUI system consist of hydraulic analysis, water quality analysis, optimized model calibration processes, and postprocessing the simulation results. Therefore this model will be effectively utilized to manage practical and efficient water quality.

• 보건의료산업학회지
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• 제7권4호
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• pp.167-178
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• 2013

The purpose of this study was to investigate the characteristics of health-related quality of life among the aged who have been living in one urban community. The number of participants was 167 of people who were 60 and over. health-related quality of life was measured by EQ-5D in Korean Version. The order of frequency of 5 domain in EQ-5D were pain/discomfort, mobility, anxiety/depression, usual activity, self care. 32 of profiles were found from the study participants, and '11111' among them was 28.7%. Mean of EQ-5D index was $0.82{\pm}0.14$. Multiple Regression analysis of health-related quality of life explained 31% of variance of health-related quality of life using EQ-5D. In this analysis, age, regular exercise, spouse were found to be predictors to health-related quality of life measured by EQ-5D. The finding of this study will be the basis of well organized model of health-related quality of life for the aged.

• 한국소음진동공학회논문집
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• 제16권5호
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• pp.457-469
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• 2006

In automotive engineering, the brand sound is one of the important advantage strategies in a car company. For the design of brand sound, the selection of descriptive word for a car sound is one of major works in automotive sound quality research. In this paper, booming and rumbling sound, which are professional words used by sound and vibration engineers are used for the design of brand sound. We employed sound quality metrics, which are used in the psychoacoustics. By most research results, the relationship between subjective evaluations and sound quality metrics has nonlinear characteristics. In order to correlate these subjective evaluations with sound quality metrics, the artificial neural network technology has been applied to two-dimensional sound quality index for a passenger car. These indexes are used for 46 passenger cars, which are samples of the famous cars around the world. Also a preference evaluation for car sound was carried out by sound and vibration engineers. We coupled this preference with booming and rumbling sounds by using artificial neural network. In future, the two dimensional sound and preference index will be very useful to develop brand sound in passenger cars.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2009년도 추계학술대회
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• pp.251-268
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• 2009

This study aimed at working out a practical plan in order that National Quality Award may be helpful to develop enterprises. In line with this aim, this study investigated the cases of foreign countries that evaluate the quality managements of enterprises on the basis of the standard model, and the aftereffect of winning the award, and its influence on management performance. Investigation was focused on the companies that won Quality National Award as a result of quality innovation activities and met with good results since then and finally won Korea Quality Grand Prix 3 years after winning the award, and questionnaire was performed to the directors of the competent authorities. The questionnaire was sent by e-mail, and its questions were made with a help from the advisers of National Quality Award. Questions were mostly focused on four parts, the general states of enterprises, the operation system of National Quality Award, the after effect of winning the award, and management performance shown after winning the award.

• 근관절건강학회지
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• 제9권2호
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• pp.166-176
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• 2002

The purpose of this study was done to identify analysis study quality of life in home stayed arthritis patients. The subject for this study were 56 arthritis patients in K city and boundary area resident, and period of data collection was from July, 2000 to November, 2000. The results are as follows. 1. Mean score of Quality of life was $171.13{\pm}44.08$(range from 66 to 244), Mean score of depression was $36.71{\pm}12.11$(range from 18 to 64), score of social support was $3.96{\pm}5.30$(range from 0 to 19), and score of stress was $322.80{\pm}34.18$(26 to 2316). 2. Main demographic factor influenced upon quality of life was age, sex, educational level and marital status, and main Physical factor influenced upon qualify of life was height, systolic and diastolic blood pressure. 3. Quality of life was correlated negatively with depression, and positively social support. 4. quality of life in home arthritic patient was explained 68% by depression, age and social support. In conclusion, nursing intervention of arthritic patient in home considers age, social support and depression in order to promote quality of life.

• 동서간호학연구지
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• 제19권1호
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• pp.1-6
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• 2013

Purpose: The purpose of this study was to identify factors influencing quality of life of caregivers using day care services. Methods: Data were collected from 14 different day care services in D city, with a total of 146 female caregivers as participants. All participants were at home caregivers whose patients were senior citizens older than 65. Data were collected from September 1 to 30 of 2008 and analyzed by t-test, ANOVA, Pearson's correlation coefficient, and stepwise multiple regression. Results: Quality of life among caregivers of day care services differed significantly according to state of health, other caregivers, job, and family income. Quality of life among caregivers showed correlation with caregiving burden. The significant predictors affecting quality of life were state of health, other caregivers, job, and family income and caregiving burden. A combination of these predictors accounted for 43.5% of the variance in quality of life. Conclusion: These findings show that quality of life of family caregivers using day care services is influenced by caregiving burden. Development of day care service programs is necessary in order to reduce caregiving burden of family caregivers for the elderly.

• 한국항만경제학회지
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• 제21권3호
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• pp.259-270
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• 2005

This study applies the Analytic Hierarchy Process (AHP) to evaluate service quality of Third-Party Logistics (3PL) providers. For this, 3PL service quality is conceptualized and measured using SERVQUAL's five dimensions such as tangibles, reliability, responsiveness, assurance and empathy. Then, the AHP method is applied to determining the relative importance of five service quality dimensions and eventually selecting the best 3PL provider. Finally, this study conducts an empirical case study on four companies providing 3PL services in Korea to demonstrate the basic idea suggested in this paper. The results obtained in the present study indicate that responsiveness to customers is the most important factor perceived by 3PL customers and 3PL C is the best 3PL provider according to the overall service quality scores. In contrast to some previous researches, this study examined issues of service quality from the perspective of 3PL customers as opposed to the perspective of 3PL providers. In order for this study to be more complete, future research is needed in establishing a set of metrics to quantify each dimension of 3PL service quality proposed.

• 아동학회지
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• 제33권1호
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• pp.111-131
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• 2012

This study examined the relationship between parenting, the quality of peer relationships, and loneliness in adolescents. This study also examined the mediating effects of the quality of peer relationships on the relationship between parenting and adolescents' loneliness. A total of 506 1st and 2nd grade middle school students (261 boys and 245 girls) from the Seoul Metropolitan area completed measures of parenting, the quality of their peer relationships, and loneliness. The results indicated that adolescents' perceptions of parenting and the quality of their peer relationships were significantly related to their feelings of loneliness. Specifically, adolescents' perceptions of low levels of parental monitoring and high levels of abusive and neglectful parenting were associated with high levels of loneliness. Adolescents who perceived the quality of their peer relationships to be low reported high levels of loneliness. Further, the quality of peer relationships mediated the relationship between parenting and adolescents' loneliness; however, the pattern of associations differed for boys and girls. These findings suggest that both parent and peer relationship factors should be considered in combination in order to better explain loneliness in adolescents.