• Korean Journal of Construction Engineering and Management
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• v.9 no.4
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• pp.84-91
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• 2008

"Eco-friendly construction" is an emerging issue in the building industry. Main purpose of the eco-friendly construction is to sustain the health and environment of building residents and to minimize the harmful effect on their environment. Apartment residents have great concern on eco-product, since many cases are reported that Sick Building Syndrome is caused by toxic substance from building materials. Environmental performance is to meet through using the highest grade eco-friendly materials. However, generally eco-friendly materials are more expensive than normal materials, Therefore, using eco-friendly materials at public housing project is limited to economical aspect. The purpose of this paper is development of eco-friendly material selection model considered cost efficiency. The selection of Eco-friendly finishing materials and their methods are constructed to consider environmental performance level and cost index compositively. Development of eco-friendly material selection method is economic and reasonable one when public housing is constructed.

• Journal of Digital Convergence
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• v.13 no.8
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• pp.357-368
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• 2015

This cross-sectional study was performed to offer radiographer who registered to the Korean Association of Radiographers as a basic material promote job satisfaction and lower job stress. A total of 213 radiographer were surveyed using a self-administered questionnaire. The 105 questionnaires consist of general characteristics, job characteristics, job stress, and job satisfaction. The job satisfaction was categorized into 3 sub-scales; psychological variables, environmental variables, and structural variables. The job stress insufficient job control, interpersonal conflict, job insecurity, organizational system, lack of reward, and occupational climate. Job satisfaction in psychological variables of radiographer was higher in the radiographers who have a high level of education, work in seoul,have a high sense of mission, don't have job leaving attitude, have a lower job insecurity. Job satisfaction in environmental variables of radiographer was higher in the radiographers who get lower salary. Job satisfaction in structural variables of radiographer was higher in the radiographers who have a high sense of mission, don't have job leaving attitude, have a lower organizational system, lack of reward, and occupational climate. Job satisfaction of radiographer was higher in th radiographers who don't have job leaving attitude, have a high sense of mission, have a lower lack of reward, and occupational climate.

• Journal of Korea Society of Industrial Information Systems
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• v.27 no.5
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• pp.73-82
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• 2022

Chronic diseases such as hypertension require a differentiated approach according to age and life cycle. Chronic diseases such as hypertension require differentiated management according to the life cycle. It is also known that the cause of hypertension is a combination of various factors. This study uses machine learning prediction techniques to analyze various factors affecting hypertension by life cycle. To this end, a total of 35 variables were used through preprocessing and variable selection processes for the National Health and Nutrition Survey data of the Korea Centers for Disease Control and Prevention. As a result of the study, among the tree-based machine learning models, XGBoost was found to have high predictive performance in both middle and old age. Looking at the risk factors for hypertension by life cycle, individual characteristic factors, genetic factors, and nutritional intake factors were found to be risk factors for hypertension in the middle age, and nutritional intake factors, dietary factors, and lifestyle factors were derived as risk factors for hypertension. The results of this study are expected to be used as basic data useful for hypertension management by life cycle.

• Proceedings of the Korean Vacuum Society Conference
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• 2016.02a
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• pp.327.2-327.2
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• 2016

유기물/무기물 나노 복합체를 이용한 전자 소자는 간단한 공정과 고집적 및 플렉시블 응용 가능성으로 차세대 전자 소자로서 응용 연구가 많이 시도되고 있다. 무기물의 경우 전하 전송 메커니즘과 전기적 특성에 영향을 미치는 다양한 요인들에 대한 연구가 많이 진행되었지만 유기물의 경우 소자의 특성에 집적적으로 영향을 미치는 요인들에 대한 이론적 연구가 미흡하다. 본 연구에서는 금속/유기물 경계면의 전하전송, 트랩밀도 및 전하 이동도가 소자의 전기적 특성에 어떠한 영향을 미치는지 분석하였다. 유기 메모리 소자의 전하 전송 메커니즘을 분석하기 위해 PMMA에 나노 입자를 분산시킨 유기-나노 복합층을 사용하여 유기 메모리 소자를 제작하였고 SCLC 이론을 이용하여 전기적 특성을 분석하였다. 또한 전극과 유기-나노 복합층 사이에 C60 층을 삽입하여 트랩밀도와 전하이동도가 유기물 전자 소자에 어떻게 영향을 미치는지에 대한 이론적인 연구를 하였다. SCLC 이론을 이용하여 계산한 current density -voltage (J-V) 특성 이론값과 실험값의 비교 분석으로 유기물전자 소자의 전기적 동작 특성에 대한 메커니즘을 규명하였으며, 유기물 메모리 소자에서 트랩밀도와 분포가 전기적 특성에 미치는 영향에 대하여 연구하였다.

• Journal of Digital Convergence
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• v.13 no.5
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• pp.297-307
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• 2015

This study reviews equipped with enhanced capability of medical care, quality service, accessibility, and consumer awareness to be a competitive and representative local healthcare service provider with improved administrative efficiency. The method of analysis are ANOVA and Structural Equation Modeling. The results which revealed the significant difference among demographic factors in determining the preference or degree of satisfaction at medical service to select local healthcare institutions suggest that the close review on the needs of groups of major customers of local healthcare institutions are necessary when preparing the strategy of specialized medical service of local healthcare institutions. this suggests that both images would be important factors to secure the competitive advantage of local healthcare institution and therefore the strategy maximized the enhancement of medical service with embossed image of hospital to attract customers of medical service is needed.

• Proceedings of the Korea Water Resources Association Conference
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• 2023.05a
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• pp.260-260
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• 2023

일반적으로 수위·유량 거동은 시간에 따른 수위·유량의 변화량으로 분석이 가능하며, 이를 토대로 연간, 특정 기간의 수위·유량을 분석 및 예측하여 수자원을 효율적으로 활용하고, 재해 예방에 활용할 수 있다. 이러한 수위·유량의 거동에는 다양한 요인들이 영향을 미치며, 대부분의 경우 해당 요인들이 복합적으로 산재하여 각 요인의 영향이 중첩되어 수위 거동을 이해하기에 어려움이 존재한다. 그에 따라 본 연구에서는 웅천천 보령시(노천교) 지점을 대상으로 강우, 유출, 유입에 따른 수위·유량의 거동분석을 실시하였다. 보령시(노천교) 지점은 다양한 외부 요인들이 존재하며, 각 요인이 비교적 독립적으로 작용한다는 가정을 하여 지점의 수위·유량의 요인별 거동 양상을 분석하고자 한다. 우선 금강홍수통제소에서 제공되는 보령시(노천교) 10분 수위 자료와 일 강수량을 비교하여 강우에 따른 수위 패턴을 분석하였다. 이후 보령시(노천교) 10분 수위 자료를 한국수자원조사기술원에서 개발한 수위-유량관계곡선식을 이용해 10분 단위 유량으로 환산하고, 이를 한국수자원공사에서 제공하는 보령댐 10분 단위 총방류량 자료 중 하천 방류량(소수력, 관개(몽리), 하천유지, 등)에 해당하는 내용들을 추출해 비교하였다. 그 결과, 하천의 기저유량은 방류량에서 결정되는 것으로 확인되었으며, 강우량에 따른 수위상승은 비교적 직접적인 요인으로 일어났다. 1순위 수위(2.52m)는 강우에 의해 영향을 받고, 2순위 수위(2.24m)는 방류량에 영향을 받은 것으로 분석되었다. 또한 4~5월 기간에는 기저수위 이하로 떨어지는데, 이는 농업용수 취수의 영향으로 기저수위 이하의 수위거동을 보인 것으로 분석되었다 이를 통해 하천수위 거동을 요인별로 분석할 수 있었으며, 향후 물수지적 관점으로의 추가분석이나 강우에 따른 댐 방류량 조절을 수위로 치환해 더욱 세밀하게 조절할 수 있을 것으로 예상된다.

• 한국노년학
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• v.37 no.4
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• pp.893-907
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• 2017

This study aimed to investigate factors affecting frailty by urinary incontinence groups among the vulnerable elderly woman in Korea. In this secondary analysis, data were collected from records for 3,251 elders registered in the Visiting Health Management program of Public Health Centers in 2012. body mass index, waist circumference, timed up & go, depression, self rated helath, walking exercise, flexibility exercise, strengh exercise and frailty were assessed. Data were analyzed using $x^2$-test, t-test, ANOVA, Pearson's correlation and stepwise regression to determine the associated factors of frailty by urinary incontinence. Depression, walking exercise, timed up & go and age were found to be factors significantly associated with frailty among the elders with incontinence(F=38.321, p<.001). Age, depression, walking exercise, self rated health and tined up & go were found to be factors associated with frailty in the elders without incontinence(F=265.666 p<.001). The findings show that frailty of elders and associated factors were different by urinary incontinence, and common factors affecting frailty were depression, walking exercise, timed up & go, age. Thus, these factors should be considered in the development of intervention program for care and prevention of frailty and program should be modified according to urinary incontinence.

• Journal of Digital Convergence
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• v.16 no.1
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• pp.371-379
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• 2018

The purpose of this study was to investigate the effects of maladaptive perfectionism and stress coping on chronic fatigue of adolescent athletes. In order to achieve these purposes, a questionnaire survey was conducted with 254 adolescent athletes. The following conclusions were obtained. 1. In the stress coping and chronic fatigue level by maladaptive perfectionism level, the higher the level of maladaptive perfectionism showed a high level of emotional mitigation coping, wishful thinking seeking and chronic fatigue. 2. The correlation between maladaptive perfectionism, stress coping and chronic fatigue showed a significant level between each sub-factor. 3. The influence that maladaptive perfectionism and stress coping have on chronic fatigue are "anxiety about a mistake", "a doubt about the performance", "emotional mitigation coping" and "wishful thinking seeking". This result suggest importance of dealing with maladaptive perfectionism and stress coping in reduce the chronic fatigue.

• Journal of Digital Convergence
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• v.14 no.9
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• pp.579-588
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• 2016

This study is to identify the relationship between cultural physical education class of enjoyment factor, class satisfaction, and exercise continuation behavior. For this purpose, 275 out of 300 copies of survey aimed at students in four universities located in Gyeong-gi province were used. PAWS 18.0 program was used for analysis to present descriptive statistics. Principal component analysis and rotation of Max Berry were used among exploratory factor analysis to check factor extraction and internal consistency. Cronbach's alpha was used for checking reliability. Multiple regression analysis was used to clarify the relationship between enjoyment factor, class satisfaction, and exercise continuation behavior of cultural physical education. These are the following conclusions. First, instructional behavior, grade in physical education, environment, and exercise ability among the enjoyment factors in cultural physical education class have a significant effect on persistence of exercise. Second, instructional behavior and grade in physical education are the factors of class satisfaction and the have a significant effect on persistence of exercise.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.35 no.2
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• pp.427-436
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• 2015

This study analyzes the factors effecting on pedestrian crossing behavior in the unsignalized intersection. Pedestrian crossing behavior is the results of mental stress defined as a combination of environment perception, avoiding accidents, halting collision, and instant crossing decision. It is necessary to make walkable intersection in cities through relieving this stress influenced by personality, traffic condition, and roadway environment. The purpose of study is empirically to examine the crossing behavior such as crossing satisfaction, crossing trial frequency and waiting time based on various factors effecting on crossing intersection by video and questionnaire survey. The $x^2$-test is applied to analyze the characteristics of crossing trial frequency according to each factor. Also, the hazard rate model is established to find the factors effecting on waiting time for crossing. Finally, the direct and indirect effects on the pedestrian crossing satisfaction are presented as the results of LISREL.