• 한국태양에너지학회:학술대회논문집
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• 한국태양에너지학회 2008년도 춘계학술발표대회 논문집
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• pp.160-165
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• 2008

The concern in energy reduction in the field of architecture which takes up a big weight in domestic energy consumption is gradually increasing. For this reason, a lot of research work on this matter is being carried out. Particularly, it is generally required that currently used system in a structure for energy reduction should be maximized in its efficiency. In addition, research on several energy reduction typed systems is underway. Such a research work should not only include the one in time of the present but also keep up with the trend for future-oriented research. This research paper forecasted and analyzed the trend for global warming and demand of a structure for energy in the future by applying climate scenarios to cooling degree-day and heating degree-day. Also, this research found out the decrease in heating degree-days and increase in cooling degree-days until this moment due to the progress of global warming. In addition, as for heating degree-days in the future forecasted on the basis of HadCM3, it is estimated that the range of decrease could be ever bigger starting 2040 in case of Seoul and also starting 2010 in case of Ulsan ever after respectively. In case of cooling degree-days, it is estimated that its increase range could be bigger abruptly starting 2050, and after 2080, its increase range would be much bigger.

• 한국기계가공학회지
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• 제2권4호
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• pp.33-39
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• 2003

The stiffness of multi-articulated industrial robots is very weak, because their structure is an articulated type with some links and joints. Thus it is known that cutting processes for metals are not accepted in machine shop well, but they have a lot of merits for cutting processes, for example, drilling, tapping, and engraving etc, because of the characteristics of their high degree of freedom. The temptation of cutting aluminium was carried out to investigate the feasibility and the limitations or constraints for cutting metals on them. First the mode shapes of 6 degree of freedom welding robot were taken and analysed, and next the cutting processes were practically carried out on it. The results of study were found out to show the feasibility of cutting processes at drilling under 6mm of tool diameter, as well as to have some limitations and constraints, for examples, feed rate, depth of cut and cutting force etc.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제6권12호
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• pp.3117-3132
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• 2012

The tree topology in multicast systems has high transmission efficiency, low latency, but poor resilience to node failures. In our work, some nodes are selected as backbone nodes to construct a tree-like core overlay. Backbone nodes are reliable enough and have strong upload capacity as well, which is helpful to overcome the shortcomings of tree topology. The core overlay is organized into a spanning tree while the whole overlay is of mesh-like topology. This paper focuses on improving the performance of the application-layer multicast overlay by optimizing the core overlay which is periodically adjusted with the proposed optimization algorithm. Our approach is to construct the overlay tree based on the out-degree weighted reliability where the reliability of a node is weighted by its upload bandwidth (out-degree). There is no illegal solution during the evolution which ensures the evolution efficiency. Simulation results show that the proposed approach greatly enhances the reliability of the tree-like core overlay systems and achieves shorter delay simultaneously. Its reliability performance is better than the reliability-first algorithm and its delay is very close to that of the degree-first algorithm. The complexity of the proposed algorithm is acceptable for application. Therefore the proposed approach is efficient for the topology optimization of a real multicast overlay.

• Child Health Nursing Research
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• 제7권1호
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• pp.51-61
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• 2001

The purpose of the descriptive correlation study was to examine relations among the hope, the burden and the family function in mothers caring for children with cancer. 145 mothers completed the three questionaires of the study divided into tree sections: a) The Hope Scale, b) The Burden Scale, c) FACES-Ⅲ. The collected data was analysed with t-test, ANOVA, Scheffe test and Pearson correlation coefficients. The results were as follows: 1) The average age of mothers of children with cancer was 35.6 years old and the ages between 30 to 39 were the most abundant. 57.3％ of the mothers had an education level of below high school education and 66.0％ had religion. The average age of the children was 8.6 years old. Ages between 1 to 7 were the most and 60.8％ were diagnosed as leukemia. 2) Regarding the section of degree of burden, mothers of children with cancer marked 2.6 out of 5, and the degree of hope 3.2 out of 4. The result for family function came out to be 3.5 out of 5, an average of family cohesion of 3.9 and family adaptation of 3.1. 3) There were significantly less burden to the mothers who were living together with a spouse compared to the mothers who were not. Also mothers who replied that they preserved good health came out to be exposed to less burden compared to the mothers who did not. In analysing hope according to the general characteristics of mothers of children with cancer, mothers who were employed marked high in the degree of hope compared to unemployed mothers. Furthermore, the degree of family cohesion marked higher with mothers who had higher education of college graduate, mothers with religion and mothers with a monthly family income of over ￦3,000,000, compared to the group of mothers with lower education of high school graduate, non-religious or with a monthly family income of less than ￦1,000,000. 4) Excluding the fact that the group sorted with children diagnosed as leukemia marked a perceivably high score regarding family cohesion, compared to groups with other cancers, the degree of burden, hope and family cohesion did not show any noticeable difference according to characteristics of children with different cancers. 5) In the correlation of the hope, the burden and the family function regarding the mothers of children with cancer, the burden did not have any manifest relationship with hope or family function. However, the degree of hope and family function cohesion had a direct proportional relationship, as family cohesion marked higher when the degree of hope were high.

• 정보교육학회논문지
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• 제11권3호
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• pp.379-387
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• 2007

본 연구는 기업 종사자를 위한 e-러닝 학습 환경에서 사회 연결망 지표들이 인지적 및 정의적 등 두 가지 유형의 학습 성과와 어떤 상관관계를 갖고 있는지를 탐색하기 위해 실시되었다. 연구 결과, 외향 중심도와 내향 중심도 등 사회 연결망 지표 두 가지 모두가 인지적 및 정의적 학습 성과와 상관이 있을 것이라는 가설은 부분적으로만 채택되었다. 즉, 인지적 학습 성과는 외향 중심도와 내향 중심도와 공히 상관을 보였으나, 정의적 학습 성과는 어떤 중심도와도 상관되어 있지 않았다. 나아가 다중회귀 분석을 실시한 결과 수업에 참여한 학습자들이 얻은 기말 점수로 측정된 인지적 학습 성과는 내향 중심도(52%), 외향 중심도(8%)에 의해 통계적으로 유의미한 수준에서 예언할 수 있음을 알 수 있었다. 이러한 연구 결과는 온라인 학습 상황에서 개인 학습자의 사회연결망 내에서의 위상이 학습 성과에 영향을 미칠 수 있다는 선행 연구 결과와 일치하고 있다.

• 한국학교ㆍ지역보건교육학회지
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• 제5권
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• pp.43-70
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• 2004

This research was conducted to provide basic document on efficient health promotion behavior program that elementary school students can use from elementary school course to enhance health promotion behavior for healthy life by checking out the degree of the most influential factor for health promotion behavior about elementary school students who establish lifelong health habit, and by checking out the relation between the degree of self-efficacy and health promotion behavior. The number of subjects of this research was 598. They were all elementary school students from the sixth grade students of the 5 cities of the Kyeong Nam province. We conducted questionnaires and did statistical analyses by using 592 papers which were suitable for date analyses with SPSS. The conclusions were as follows; A. The degree of self-efficacy The degree of self-efficacy of elementary school students was more than average. The degree of self-efficacy on physical activity was the highest and the degree of self-efficacy on self-fulfillment was the lowest. The degree of self-efficacy of girl students was comparatively higher than that of boy students. When their parents got higher education, made a lot of money and kept harmony with their children, the degree of self-efficacy became high. Furthermore, when their parents or themselves have a lot of interest in health, they feel that they are healthy, and they feel that they are satisfied with their bodies, the degree of self-efficacy was high too. B. The degree of health promotion behavior Although the degree of health promotion behavior of elementary school students was a bit lower than the degree of self-efficacy, it was higher than average. The degree of health promotion behavior on physical activity was the highest. But the degree of health promotion behavior on health of their own was the lowest. The degree of health promotion behavior between girl students and boy students was the same. When their parents got higher education, made a lot of money and kept harmony with their children, the degree of self-efficacy became high. Furthermore, when their parents or themselves have a lot of interest In health, they feel that they are healthy, and they feel that they are satisfied with their bodies, the degree of self-efficacy was high too. C. The relation between self-efficacy and health promotion behavior When the degree of self-efficacy was high, the degree of health promotion behavior was high too. So there was high positive relationship between self-efficacy and health promotion behavior. Physical activity showed the highest relationship. The order of strong relationship run as follows. Relationship with others, self-fulfillment, management of stress. The higher self-efficacy which was a recognizable factor on health behavior, the higher the degree of health promotion behavior. It is being revealed that many modem chronic diseases are cause by accumulated careless attitude on harmful health habit and lack of self-control. The behavior of keeping healthy and enhancing health is more firm when they have high self-efficacy which is believing their own conviction. So, When we teach elementary school students health promotion education at school, we should try to enhance their own self-efficacy rather than just instill simple information about health. By doing so, we can help them change their attitude on health. Then, they could enjoy life-long healthy life.

• 한국지리정보학회지
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• 제9권4호
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• pp.193-203
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• 2006

이 연구는 GIS를 이용하여 지형의 개석도를 측정하고 그 결과를 지도화 하여, 연구지역의 개석도와 토지이용과의 관계를 분석한 것이다. 지형의 개석도 분석에 GIS의 활용하면 전통적인 수작업에 비하여 시간과 노력이 획기적으로 절약되고 개석도 분석에 적용되는 변수를 다양화 할 수 있으며, 그 결과물을 이용한 2차적인 연구도 가능하다. 이 연구도 이러한 배경에서 출발하여 GIS를 활용한 개석도 분석 방법을 모색하고, 개석도의 분석 결과와 토지이용도를 비교 분석하여, 개석도의 분석 결과에 대한 적극적인 활용을 시도하였다. 연구지역인 강릉 남대천 유역권의 개석도와 농업적 토지이용 사이의 관계 분석 결과, 농업적 토지이용 대부분 지형의 개석이 많이 진행된 지역에 분포한다. 특히, 농업적 토지이용 중 논과 밭으로 이용되는 토지가 개석도와 더 높은 상관도를 보였다. 지역별로 개석도와 농업적 토지이용간의 상관관계를 비교하였을 때 토지이용이 집약적으로 이루어지는 동지역이 읍면지역에 비하여 상관성이 낮게 나타났다.

• 산업기술연구
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• 제41권1호
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• pp.7-13
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• 2021

Fiber-reinforced polymer reinforcement or polyurea reinforcement techniques are applied to strengthen unreinforced masonry walls (UMWs). The out-of-plane reinforcing effect of sprayed glass fiber-reinforced polyurea (GFRPU), which is a composite elastomer made of polyurea and milled glass fibers on UMW, is experimentally verified. The out-of-plane strengths and ductile behaviors based on various coating shapes are compared in this study. An empirical formula to describe the degree of reinforcement on the out-of-plane strength of the UMW is derived based on the experimental results. It is reported that the peak load-carrying capacity, ductility, and energy absorption capacity gradually improve with an increase in the strengthening degree or area. Compared with the existing masonry wall reinforcement method, the GFRPU technique is a construction method that can help improve the safety performance along with ease of construction and economic efficiency.

• 유통과학연구
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• 제18권3호
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• pp.25-36
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• 2020

Purpose: Based on previous researches on social factors of digital item purchase in digital contents distribution platforms such as SNS, we aim to develop the integrated model that accounts for the dynamic and interactive relationship between social structure indicators and digital item purchase. Research design, data and methodology: A PVAR model was used to capture endogenous and dynamic relationships between digital item purchase and network indicators. Results: We find that there exist considerable endogenous and dynamic relationships between digital item purchase and network structure variables. Not only lagged in-degree and out-degree but also in-closeness and out-closeness centrality have significant and positive impacts on digital item purchase. Lagged clustering has a significant and negative effect on digital item purchase. Lagged purchase has a significant and positive impact just on the present in-closeness and out-closeness centrality; but there is no significant effect of lagged purchase on the other two degree variables and clustering coefficient. We also find that both closeness centralities have much higher carryover effect on digital item purchase and that the elasticity of both closeness centralities on the purchase of digital items is even higher than that of other network structure variables. Conclusions: In-closeness and out-closeness are the most influential factors among social structure variables of this study on digital item purchase.

• 패션비즈니스
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• 제8권2호
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• pp.1-14
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• 2004

The purpose of study is to analyze the consumer attitude toward original brand and imitation goods. To carry out this purpose, the study examined consumers' purchase frequency, degree of concern, future purchase, intention, other people's evaluation and self-satisfaction. The results of experiment can be summarized as follows: First, the consumers didn't show high degree of purchase frequency, of concern, of future purchase but they showed positive attitude in other people's evaluation and self-satisfaction. Second, they showed high degree of the purchase of imitation goods but they didn't show high degree of their degree of satisfaction. Third, with regard of their purchase intention, they purchased imitation goods because they were cheap, regardless of image, quality and design which original brand name goods had. Finally, to figure out the correlation between original brand name goods and imitation goods, their purchase intention of original brand name goods was surveyed according to their satisfaction with imitation goods after they purchased them. According to the result, they answered that they would purchase original brand name goods when they satisfied with imitation goods.