• 한국수학교육학회지시리즈A:수학교육
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• 제43권2호
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• pp.115-137
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• 2004

In this paper, we verified the effect and appropriateness of the scheme to cure the math. disliking disposition which is the cause of underachievement in learning. We choose 3 middle schools as the subject of experiment for this research. Each experiment class consists of 27∼30 students(underachievers) whose final test results of 1st school year in the middle school are 30∼60 points. In this case, we also select some middle level students whose test results are more than 60 points for the normal experimental condition. For this research, we developed the suitable test materials to cure the mathematics disliking disposition of underachievers. We applied those test materials to the experiment schools during 2.5 months and we analysed the variation of disliking disposition, the variation of math. dislike students' number and the cure rate of the math. disliking disposition. From the results of this experimental study, we find that the factors of teacher and math recognition environment have only the significant difference of math. disliking disposition between experiment class and comparison class under the 5% significance level in one middle school. We understand that this results caused by teachers' careful advice and guidance in that middle school. We also find that the number of student who dislike mathematics decreased in two middle schools. Furthermore 50% of math. disliking dispositions are cured for 9 disliking factors in the lower grade group(the group of underachievers) and as a whole, we can see that 50% of cure rate for the 7 factors of math. disliking in two middle schools. So we can understand that the experiment of our research was performed successfully in two middle schools. In this research, we find out that the scheme to cure the disliking dispositions for the factors of math. disliking depends on the factors of teacher who take charge of cure. So teachers must take interest in and must have careful concern to students and their math. disliking.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2007년도 정기학술발표대회 논문집
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• pp.337-340
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• 2007

건설교통부에서는 건설부문의 정보화를 선도하고자 건설CALS를 시작하였다. 건설CALS는 공공건설부문을 정보화하고 건설인의 정보화마인드 정착에 기여하였으며 투자대비 비용절감 효과도 큰 반면, 시스템의 노후와와 개발한 시스템의 확산전략 미수립 등의 이유로 효과가 반감되고 있다. 현 시점에서 건설CALS의 현주소를 정확히 파악하여 향후 나아갈 바를 정립하고 도입효과를 극대화시킬 필요가 있다. 이에 본 연구에서는 전략을 수립하는데 효과가 있는 SWOT분석 기법을 이용하여 건설CALS가 지향해야 할 핵심성공요인을 제시하였다. 이를 위해 문헌조사를 통해 건설CALS를 둘러싼 내${\cdot}$외부환경을 고찰하여 25개의 강점, 약점, 기회 및 위협요인을 도출하였으며 SO, ST, WO, WT 기본전략을 수립하였다. 최종적으로 전략을 달성하기 위한 14개의 핵심성공요인을 제시하였으며, 제시한 요인의 타당성 확보를 위해 건설 각 분야의 전문가에게 검증하는 절차를 거쳤다. 이 연구에서 제시한 결과들은 향후 건설CALS가 나아갈 이정표를 제시하는데 의의가 있다. 성공요인 달성을 위한 중점 추진분야 선정, 세부연구과제 도출 등의 후속연구가 지속적으로 수행되어야 한다.

• 한국조경학회지
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• 제32권2호
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• pp.36-54
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• 2004

The disposition of public parks pursue proper distribution and hierarchy formations on the basis of the neighborhood units theory. However, problems like price of land has brought about a large gap between theories and real conditions. This paper examines the problems of the practical disposition and disposition standards of public parks to solve these contradictions with reference to examples in Japan metro-cities. Study results are as follows; 1) The existing disposition theories are based on the district-boundary of men’s acting and settling down. Therefore, the disposition standards of large-scale parks or special parks beyond the humane scale have not been explained exactly. 2) As city sizes have expanded, these large-scale parks have developed greatly, however, they are located out of urban areas on the ground of nature’s geographical features. As a result, many small parks developed in urban areas. This extreme phenomenon of location would break up proper distribution and hierarchy. 3) Large parks over 4 ha not only take an important role in forming greenbelts but their location is also mainly based on their natural geographical features so that they are absorbed into the network -structure of greenbelts. 4) It is suggested that in planning parks, location and size of large parks over 4 ha should be selected and decided in the relation not with parks but with greenbelts. Parks of 4 ha or below are properly disposed. Also, these parks take a great role in forming the district boundary for settling down. Accordingly, proper distribution and hierarchy formation needs to be based on established neighborhood as they were previously.

• 한국의류학회지
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• 제26권5호
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• pp.606-617
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• 2002

The purpose of this study is to develop a decision model that helps manufacturers and retailers determine the optimal timing of markdown in order to maximize their profit. An optimal timing decision model was developed based on three steps; conjoint measurement, scenario analysis and simulation. Data were collected from the sample of 149 out of 170 undergraduate and graduate students in Seoul in 1997. From the Jeans market, 8 brands; Levi's, lee, Guess, Calvin Klein, Pintos, Get used, MFG, and Basic, were selected as competitors for this study. In the conjoint measurement, respondents estimated the level of preference, from 1 to 100, for each item in which brand, price, style, and colors were used to explain product characteristics. Then, in order to reflect competitive situation in Jeans market, four types of scenarios were developed. In each scenario, simulations were applied to decide optimal timing of markdowns that leads to maximal profitability and sales volume. The profit was calculated based on the equation; Profit = Jean's market volume x market share of each brand - cost, where market volume was obtained by integral calculus for market utility function, and market share by logit value of part-worth from the conjoint analysis. For the purpose of the parsimony of the research, costs and the level of markdown were fixed to 30% of the regular price. In results, the optimal timing decision model identified 3 different types of brands. The brands that do not need to take markdown were Ievi's, MFG, and Basic Jeans characterized by the highest brand power and the highest price zone. The brands that needed to take early markdowns were Guess, Lee, Calvin Klein, and Get Used with the intermediate level of brand power and price. The brand that need late markdown was Pintos with the weakest brand power among the competitors and the lowest price. The optimal range of markdown remains for further research.

• 대한기계학회논문집A
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• 제38권2호
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• pp.137-148
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• 2014

멀티로터는 여러 개의 로터로 이루어진 무인 비행로봇으로써, 로터의 개수에 따라서 트라이로터, 쿼드로터, 헥사로터, 옥토로터 등으로 나누어 진다. 멀티로터는 수직이착륙(VTOL) 및 높은 기동성으로 인하여 다른 무인 비행로봇에 비하여 건물이 밀집되어 있는 도심과 같은 지역의 정찰 및 감시 등 여러 응용분야에 적합하게 활용될 수 있다. 본 논문에서는 멀티로터란 이름으로 연구되고 있는 트라이로터, 쿼드로터, 헥사로터 및 옥토로터 비행로봇에 대한 통합된 동역학적 모델링에 관한 수식을 도출 및 비교 분석을 수행하고, 획득된 수식을 이용하여 각각의 멀티로터 동작원리 및 제어기법에 대한 연구를 수행하였다. 유도된 멀티로터의 동역학 모델링을 이용하여 각각의 멀티로터 형태에 따른 구동원리와 그에 따라 작용하는 힘과 모멘트에 대한 관계식을 유도하였으며, 연속루프닫음기법 기반자세 및 고도제어기를 적용하여 각각의 멀티로터 비행로봇의 구동 및 제어 성능을 시뮬레이션을 통해 검증하였다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제5권9호
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• pp.1544-1572
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• 2011

Task placement and scheduling are traditionally studied in following aspects: resource utilization, application throughput, application execution latency and starvation, and recently, the studies are more on application scalability and application performance. A methodology for task placement and scheduling centered on tasks based on virtual machines is studied in this paper to improve the performances of systems and dynamic adaptability in applications development and deployment oriented parallel computing. For parallel applications with no real-time constraints, we describe a thought of feature model and make a formal description for four layers of task placement and scheduling. To place the tasks to different layers of virtual computing systems, we take the performances of four layers as the goal function in the model of task placement and scheduling. Furthermore, we take the personal preference, the application scalability for a designer in his (her) development and deployment, as the constraint of this model. The workflow of task placement and scheduling based on virtual machines has been discussed. Then, an algorithm TPVM is designed to work out the optimal scheme of the model, and an algorithm TEVM completes the execution of tasks in four layers. The experiments have been performed to validate the effectiveness of time estimated method and the feasibility and rationality of algorithms. It is seen from the experiments that our algorithms are better than other four algorithms in performance. The results show that the methodology presented in this paper has guiding significance to improve the efficiency of virtual computing systems.

• 한국식품조리과학회지
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• 제32권3호
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• pp.333-341
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• 2016

Purpose: In this study, we comparatively investigated the nutrition knowledge, dietary attitude, and dietary behavior related to salt according to the types of dietary life style for differences between the groups. Methods: The survey was conducted between May 1 to July 31, 2014 among 500 adults aged >19 years in Seoul, Gyeonggi-do and Chungcheong-do areas. Results: Factor analysis of the dietary life style, indicated 4 factors including food convenience factor, food information emphasis factor, behavior factor of pursing food taste, and food purchase standard factor, which were classified into 3 groups according to differentiated dietary life style types; group 1 emphasized convenience and diversity of food, and price sensitiveness. and included subjects who had low interest in health and nutrition and were less likely to take care of their health through regular exercise,; group 2 emphasized food ingredients, food additives, usage and food purchase standards. and included subjects who were more likely to take care of their health through exercise and showed lower intake of fast food and less cases of eating out.; and group 3 showed relatively higher tendency toward dietary life style factors than the other two groups. The level of nutrition knowledge in sodium intake differed according to dietary life styles, and showed a significant difference in the dietary practice of sodium intake. Conclusion: Nutrition education on the healthy dietary habit of reducing sodium intake be based on ge and gender. In addition, an effort is required to improve behavior, interest, and attitude according to the important tendencies of the dietary life style.

• 실천공학교육논문지
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• 제9권2호
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• pp.175-182
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• 2017

학교상담은 우리나라 상담의 모태라고 할 수 있다. 우리나라에서 처음 상담이 시작된 곳은 학교 장면이다. 학교에 재학하고 있는 청소년들은 미래를 준비하면서 현재를 살아가는 사람들이다. 이들이 미래에 제대로 기능하도록 준비시키기 위해서는 학교상담전문가들의 역할이 매우 중요하다. 학교상담전문가들은 청소년들이 그들 삶을 잘 준비하도록 조력하는 일도 맡고 있다. 이러한 일을 잘 수행하기 위해서는 미래의 변화를 조망하고 변화된 미래에 잘 적응하는 데 필요한 역량이 무엇인가를 알고 이에 맞게 대처해 나가야 한다고 본다. 본 논문에서는 변화해 가는 환경에서 학교상담은 어떻게 대처해야 하는지에 대해 살펴볼 것이다. 우선 미래사회의 변화 전망, 미래 직업 세계의 변화 전망, 미래사회의 인재상에 대해 논의하고, 이러한 준비를 조력하기 위하여 학교상담은 어떻게 이루어져야 하고 학교상담전문가들은 어떤 역할을 해야 하는지 알아보고자 한다.

• 복식문화연구
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• 제29권5호
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• pp.679-693
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• 2021

The aim of this study was first to expand participation types in the field of beauty design by examining activities in the field, and second, to seek practical methods for addressing the important issue of social responsibility amid the current pandemic situation. Accordingly, social responsibility in design was examined through a review of previous studies. The features of practice domains and design performance fields were examined comparatively. As a result, it was found that social practices take place in various sectors, with sensibility toward the environment being escalated to a new level in the cosmetics industry. In terms of cosmetics enterprise practices, collecting, recycling, manufacturing, and retail networking has been established to reuse up to 95% of waste resources. Furthermore, ethical responsibility and participation concerning product and service waste resources are recommended, resulting in the supply of eco-friendly products in a virtuous cycle. In terms of systematic policy, even component transformation (such as organic certification and excluding toxic substances) is being carried out. However, it was difficult to identify such responsible activities in Korea; thus, systematic practice is needed. Designers take part in talent donation activities, and it was the sector they prefer the most. However, it is necessary to conduct studies on limitations such as venues equipped with cosmetics procedure equipment and public cosmetics sanitation and make systematic improvement, such that activities can be led with initiative from passive participation.

• 한국항공우주학회지
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• 제50권5호
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• pp.325-332
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• 2022

우주탐사 임무를 수행하기 위해서는 탐사선에 수직이착륙 기능이 필수적으로 탑재되어야 한다. 수직이착륙을 위해서는 탐사선의 엔진이 적절한 추력제어 정확도와 짧은 응답시간을 가져야 한다. 하이브리드 로켓은 이러한 조건을 만족할 수 있는 높은 수준의 추력제어 능력을 갖고 있다. 이 연구는 개발한 하이브리드 로켓 엔진의 추력제어 성능이 수직이착륙에 적절한지 검증하는 것을 목적으로 하고 있다. 이를 위해 가압장치 없이 공급압력이 감소하는 산화제 공급시스템을 적용한 엔진을 사용하여 약 10초 내외의 임무를 수행하고자 하였고, 공급압력 감소가 추력제어 정확도와 응답시간에 미치는 영향을 확인하였다. 실험결과에 의하면 적절한 감소율과 초기 압력 수준이 추력제어 정확도와 응답시간에 중요한 영향을 미치는 인자로 확인되었으며 고도제어 시뮬레이션을 통해 추력제어 성능을 검증했다.