• Ecology and Resilient Infrastructure
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• 제5권2호
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• pp.88-93
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• 2018

In-situ water quality sampling is used for accurate water quality assessment. However, in-situ water quality sampling offers limited samples and requires much time and intensive labors. Remote sensing approach has recently applied for water quality assessment. It has shown the advantage of offering a synoptic view but also more efficient and economical. In this study, we utilized Landsat Imagery to estimate the water quality of the Tamsui River basin, considered as one of the most important rivers located in the north of Taiwan. In order to monitor water quality of Tamsui River basin, a linear regression relation between the value of spectral radiance and four water quality parameters are investigated with 38 water sampling stations. Through the regression model, we could estimate river pollution index (RPI) from the predicted value of four water quality parameters. By using RPI, we can examine the pollution level of Tamsui River. The accuracy of RPI conversion of this study ranged from 32.2% to 68.2%.

• 한국경영정보학회:학술대회논문집
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• 한국경영정보학회 2007년도 International Conference
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• pp.885-890
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• 2007

This study is to investigate factors that affect usage change in mobile data service (MDS). In the first, an exploratory study based on 378 survey responses was conducted to learn about important decision factors of MDS usage. It revealed discrepancy between the influencing forces of usage increase and those of usage decrease. Based on the findings from the exploratory study and the two-factor theory, we postulated information quality as the motivator and system quality as the de-motivator (or hygiene) of MDS. Then, a confirmative study was undertaken on their respective role in encouraging and discouraging the usage of mobile data service. A research model was proposed and subsequent hypotheses were empirically tested with partial least square (PLS) based on 478 responses from the users of mobile data service. It was learned that information quality (as a motivator) was positively associated with usage increase in mobile data service, but system quality (as a de-motivator) was not. Also, system quality was negatively associated with usage decrease, but information quality was not. Lastly, their association strength was partially moderated by the type of motivation for using MDS.

• 근관절건강학회지
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• 제19권3호
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• pp.329-339
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• 2012

Purpose: This study was to examine the effect of perceived health status, sleep and depression on quality of life of older people in the elderly school. Methods: A cross-sectional descriptive study was conducted with a survey of 155 older persons in person 2 elderly school at J City. The data were analyzed with t-test, ANOVA, Pearson's correlation coefficients, and multiple regression using SPSS WIN 18.0 program. Results: The mean score of the quality of life was 8.10 (SD=8.79). Quality of life was significantly different by educational levels (F=4.711, p=.001). The result of the regression indicated that perceived health status, sleep, and depression explained 18.5% of variance in quality of life. Conclusion: Perceived health status, sleep and depression were associated with quality of life in the elderly. It is necessary to develop nursing strategies for the improvement of quality of life, considering health status, sleep, and depression in the elderly.

• 한국지역사회생활과학회지
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• 제20권3호
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• pp.397-411
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• 2009

The use of local product foods and fresh-cut products, the dietitian's recognition, the required items and the quality for school foodservice was investigated to increase the consumption of high-quality agricultural products. Data from 578 elementary schools, 228 middle schools and 116 high schools were collected by school foodservice personnels in each regional Education Administration in Gyeong-gi province. The first criteria of buying food materials was reliability/safety for all school foodservice. The second criteria were the origin of the product and freshness/ripeness for elementary and middle schools and high school, respectively. The most important consideration for selecting a supplier was the quality of the material. The appearance/status of the food was the first factor for buying food materials. The origin and the seasonality were very important for buying farm products. Dietitians in Gyeong-gi province recognized the local products, and used them weekly. The advantages of using local products were the quick supply, freshness and safety. On the other hand, the disadvantages were the lack of information and the uncertainty of supply. Sixty eight percent of the subjects had experienced the high-quality agricultural products in school meals, but the frequency was low. The main reasons for not servicing high-quality agricultural products were the high cost and the lack of trust on the quality. Among fresh-cut products, seasonings and root vegetables were purchased most frequently, but leaf vegetables was 5.7% only. The purchase of fresh-cut products was not frequent, but usually satisfied. The advantages of fresh-cut products were the reduced workload and waste, but the reason for not using them were poor hygiene and the high price. The diverse supply system and the promotion of the local product foods would be necessary since the most food materials were purchased through suppliers. In addition, the problems related to the high cost and distrust should be resolved to expand the consumption of the high-quality agricultural products and the fresh-cut vegetables. The institutions for certifying the quality should be needed to increase the confidence of these products.

• 한국의료질향상학회지
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• 제19권2호
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• pp.14-34
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• 2013

Objectives: The purpose of this study is to provide comprehensive information of qualification systems of developed countries needed to establish our national system for QI(Quality improvement) specialists. Methods: All articles related to any applicable domestic or foreign countries' laws, operational status, and detailed programs for professional qualification system of QI were reviewed. Result: In the United States, a non-profit organization, Healthcare Quality Certification Commission (HQCC) has set the policies, procedures and standards in the field of health care quality. And qualification system of CPHQ (certified professional in healthcare quality) has been operated in order to authenticate the qualifications in the field of quality management. IBQH(international Board for quality in healthcare), a qualification system of experts in the United Kingdom, was designed to assist the qualification of professionals to improve the quality of healthcare. In addition, Health Research Center of Feinberg School of Medicine in Northwestern University has been operating Master's and doctoral degree programs in the field of the quality of care and patient safety and IHI (institute for healthcare improvement) open school was operating a professional training course related to the quality of care and patient safety. Conclusion: Quantity and complexity of information of the quality of care and patient safety have been increased. For reform of the health care system, a special training course of the expertise and leadership are needed. So far, there is no national professional certification courses in our nation. Therefore essential job skill should be acquired individually. For systematic and effective quality improvement activities, the educational and certification system with professional development model are needed.

• 치위생과학회지
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• 제16권2호
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• pp.157-164
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• 2016

이번 연구는 고등학생의 구강건강 관련 삶의 질을 측정하여 학교생활 만족도와 상관관계를 알아보고, 청소년의 구강건강 관련 삶의 질이 학교생활 만족도에 미치는 영향을 분석하기 위해 실시하였다. 2015년 11월 30일부터 12월 7일까지 대구에 위치한 1개 고등학교 학생을 대상으로 편의표본추출법에 의한 자기기입 방식으로 설문조사를 실시하여 다음과 같은 결과를 얻었다. 고등학생의 구강건강 관련 삶의 질 중 기능적 삶이 3.51로 가장 높았으며, 학교생활 만족도 중에서는 대인관계 만족도가 3.75로 가장 높았다. 그리고 구강건강 관련 삶의 질에 유의한 영향을 주는 일반적 특성은 학업성적, 학업 스트레스(p<0.05)였으며, 학교생활 만족도에 유의한 영향을 주는 일반적 특성은 학업성적(p<0.001)이었다. 구강건강 관련 삶의 질은 학교생활 만족도의 하위요인 중 대인관계, 교육환경, 사회적 지지와 정(+)의 상관관계를 보였으며, 학교생활 만족도에 영향을 주는 요인으로는 학업성적과 구강건강 안녕 삶의 질이 유의한 영향을 나타내었다. 이상의 연구결과를 종합해보면, 고등학생의 구강건강 관련 삶의 질은 청소년의 학교생활 만족도와 관련되는 다양한 요인에 영향을 미치고 있다는 것을 알 수 있다. 따라서 청소년들이 올바른 구강건강 관리습관을 형성할 수 있도록 정기적인 구강보건교육 프로그램을 개발하여 효과적으로 실행할 수 있는 제도를 마련해야 하며, 학생 및 학교, 그리고 관련 부서에서 구강건강의 중요성을 인식하고 예방 및 조기치료, 구강건강 증진을 위해 노력해야 한다.

• Journal of Information Processing Systems
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• 제8권1호
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• pp.1-20
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• 2012

The most important criterion for achieving the maximum performance in a wireless mesh network (WMN) is to limit the interference within the network. For this purpose, especially in a multi-radio network, the best option is to use non-overlapping channels among different radios within the same interference range. Previous works that have considered non-overlapping channels in IEEE 802.11a as the basis for performance optimization, have considered the link quality across all channels to be uniform. In this paper, we present a measurement-based study of link quality across all channels in an IEEE 802.11a-based indoor WMN test bed. Our results show that the generalized assumption of uniform performance across all channels does not hold good in practice for an indoor environment and signal quality depends on the geometry around the mesh routers.

• Journal of Information Processing Systems
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• 제14권4호
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• pp.916-925
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• 2018

The academic research performance is often quantitatively measured by means of using citation frequency. The citation frequency-based indicators, such as h-index and impact factor, are commonly used reflecting the citation quality to some extent. However, these frequency-based indicators are usually carried out based on the assumption that all citations are equal. This may lead to biased evaluations in that, the attributes of the citing objects and cited objects are significant. A high-accuracy evaluation method is needed. In this paper, we review various citation quality-based evaluation indicators, and categorize them considering the algorithms being applied. We discuss the pros and cons of these indicators, and compare them from four dimensions. The outcomes will be useful for our further research on distinguishing citation quality.

• Asia Marketing Journal
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• 제20권1호
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• pp.69-87
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• 2018

This study examines the linkage between Korean wave, corporate image and country image, perceived quality of products made in the country. To close a gap lacking empirical studies on impacts of corporate image to country image and to further understand impacts of Korean wave, this study conducts survey over Chinese consumers to test the effects of corporate image, Korean wave to the country image, and verify on its effects to perceived quality of the products made in the country. The results show that both corporate image and Korean wave influences to form positive country image of Korea, and perceived quality of Korean made products. The size of effects varies upon products type and stimuli. This study could provide policy makers insights how to promote country image as well as support SMEs for developing overseas markets. Also, it could give marketers valuable implications to develop effective global marketing strategies using cultural assets, country image and salient corporate image.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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• pp.1393-1396
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• 2008

Image quality is one of the most important factors affecting the performance of digital displays. This paper introduces various digital image processing techniques commonly applied to digital displays. They include preferred color correction, tone reproduction, and frame rate conversion. Also, issues related to image quality evaluation are addressed.