• 대한전기학회논문지
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• 제32권2호
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• pp.43-49
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• 1983

In this study, model simplification problem using singular perturbation technique is considered. The correctness and errors of simplified model which is obtained by the use of this technique, depends upon the order and the time scaling factor of the simplified model But, unfortunately, there is no explicit criteria for selections of these parameters. In this paper, error equations are derived and expanded by using the useful properties of $L_2$-norm. Then, new criteria for selecting the order of the simplified model and time scaling factor with respect to error bound are suggested. Since these criteria, newly proposed in this study, have strong concern about error bound, it can be used to choose the minimum order of the simplified model and time scaling factor with respect to given error bound. Conversely, if the order of the simplified model and time scaling factor are given, the error induced by the simplification can also be computed easily.

• 한국의류산업학회지
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• 제2권3호
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• pp.246-252
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• 2000

The purpose of this study was to analyze the characteristics of the factor structure in Clothing Silhouette Image and the differences of Image Evaluation related to Grouping of Line and Grouping of Body Emphasis using Silhouette Image Factor and Life Space as variables. Clothing Silhouette Image was estimated by the photographs of 9 Life Spaces ${\times}$ 23 Clothing Silhouettes with 15 semantic differentiated by-polar scales. The major finding were : The factor structure of Clothing Silhouette Image were found to include 4 factor dimensions-Capability Evaluation, Function, Activity. It was clear that Silhouette Image were affected by Life Spaces. There were the differences of Image Evaluation related to Grouping of Line and Grouping of Body Emphasis. There were the differences of Life Space Evaluation related to Grouping of Line and Grouping of Body Emphasis. Therefore it is important to considerate Life Space for selecting Clothing Silhouette.

• 한국버섯학회지
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• 제3권4호
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• pp.145-153
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• 2005

미생물을 이용한 중금속 오염지의 생물적 개량연구를 위하여 구리, 납 등 중금속 오염지인 은성 폐광과 도곡 폐광지역에서 야생버섯을 수집 동정하고 중금속 함량을 분석한 결과 Laccaria laccata가 가장 높게 나타났으며 토양 내 중금속함량이 높을수록 버섯 내 중금속 농도도 높았다. 그러나, 전이계수를 이용하여 버섯 자실체의 중금속 이행률을 알아본 결과, Amanita volvata가 카드뮴과 비소의 이행률이 가장 높았으며, 구리의 이행률은 Agaricus praesquamosus가 다른 버섯에 비해 월등히 높은 수치를 나타냈다. 납은 Mycena pura, 아연은 Marasmius pulcherripes, 니켈은 Laccaria laccata, 크롬은 Collybia confluens로 나타났다. 중금속 오염지와 비오염지인 치악산 지역에서의 담자균의 발생 분포를 비교한 결과, Russula와 Collybia 속은 비오염지와 오염지역 모두에서 발생되었으며 Leucocoprinus, Coprinus, Suillus, Lepiost, Gyroporus. Lepista, Microstoma, Stropharia, Agrocybe 속은 오염지에서만 발생되었다. 이상의 결과, Laccaria laccata 등 일부 담자균은 중금속 오염지 저감에 이용할 가능성이 있으며 이를 위한 많은 연구가 기대된다.

• 한국교육학연구
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• 제23권4호
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• pp.79-99
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• 2017

본 연구는 대학생의 수강신청 기준을 탐색하고 교양과목과 전공과목에 따른 수강신청 기준을 살펴보는 것에 목적이 있다. 이를 위해 문헌조사 및 대학생 10명을 대상으로 사전 인터뷰를 실시하여 본 연구를 위한 설문지를 개발하였다. 최종 개발된 설문지를 활용하여 대학생 301명을 대상으로 2016년 11월 1일부터 12월 5일까지 온 오프라인 설문조사를 실시하였으며, 도출된 결과는 다음과 같다. 첫째, 선행연구, 사전 인터뷰 및 전문가 검토를 통해 확정된 대학생의 수강신청 기준은 상세한 강의계획서, 강의명, 과목 커리큘럼, 국어/영어 강의, 팀 프로젝트 여부 등 총 29개였으며, 다양한 수강신청 기준 요인의 구조를 파악하고자 탐색적 요인분석(EFA)을 실시하였다. 연구자가 설정한 대학생의 수강신청 기준은 '학습 편의성', '교수자 특성', '강의 실용성', '학습 기대 및 관심', '강의 외적 요소' 등의 5개 요인으로 구성되었다. 둘째, 대학생들은 교양과목 강의를 선택 시 '학습 편의성'이 가장 중요한 요인으로 작용하고 있었으며, '학습 기대 및 관심', '강의 외적 요소', '교수자 특성', '강의 실용성' 순이었던 반면, 전공과목의 경우 '교수자 특성', '학습 편의성', '학습 기대 및 관심', '강의 외적 요소', '강의 실용성' 순으로 중요하게 인식되고 있었다. 본 연구는 대학생의 수강신청 기준을 살펴보고 이를 교양과목과 전공과목으로 나누어 심도 있게 분석하였다는 데 의의가 있으며, 추후 본 연구를 토대로 대학생의 강의 및 교육 만족도와 연계된 수강동기 및 수강신청 기준에 관한 연구의 필요성을 제언하였다.

• Journal of Construction Engineering and Project Management
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• 제6권2호
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• pp.16-23
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• 2016

The use of inappropriate procurement methods to deliver construction projects has long been acknowledged as a major source of poor project performance and is particularly problematic for the Libyan Construction Industry. Poor procurement method selection has been recognised as a major contributory factor to frequent time and cost overruns. This paper offers a way of selecting specific procurement methods to maximize successful project performance. The methodology involves an intensive review of relevant literature, followed by a semi-structured questionnaire survey. The key findings of the study reveal that 11 out of its 12 common selection criteria exhibit a significant contribution to one or more project performance criteria (time, cost and quality). Project clients should therefore prioritise these criteria when selecting a design-bid-build method. Knowledge of the criteria that contribute positively to project performance will also enable clients to work out, prior to and during construction, the best measures and provisions for successful project outcomes.

• 한국전자거래학회:학술대회논문집
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• 한국전자거래학회 2002년도 e-Biz World Conference
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• pp.155-174
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• 2002

e-Business가 기업의 경쟁력확보에 필수불가결한 요소로 여겨지면서 많은 기업들이 e-Business 에 대한 투자를 늘리고 있으며, 나름대로 e-Business에 대한 비전을 수립하고 있다. 그러나. 이러한 변화에도 불구하고 e-Business 방향성 제시를 위한 방법론이 개발되어 있지 않아, e-Business 도입을 위한 구체적인 계획의 수립이 어려운 실정이다. 따라서, 본 연구는 e-Business를 도입하고자 하는 기업으로 하여금 e-Business 도입 시 우선적으로 고려해야 하는 e-Business 도입영역을 선정하는 방법을 제시하였다.

• The International Journal of Costume Culture
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• 제9권2호
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• pp.149-159
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• 2006

The purpose of the study is to compare the clothing purchasing behaviors between Korean and American college women and to gather a basic data to establish a clothing marketing strategy and effective world marketing strategy in the fashion marketing. 1,150 questionaries were distributed to 3 universities in Korea and 3 universities America from March, 15 to 30 in 2006 and a total of 800 questionnaires, 466 from Korea and 334 from American, were utilized in the final analysis. The SPSS 12.0 was used to analyze the technical statistics like average and frequency, t-test, X$^2$, factor analysis and multi-variate analysis of variance.

• 대한한의학회지
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• 제29권5호
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• pp.104-110
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• 2008

Objectives : The purpose of this study is to develop the method of selecting representative pulse wave. Methods : The pulse waves were acquired at the right and the left Guan point(關部) with 1420 people who were apparently healthy. The shape agreement of right and left pulse wave and the floating-sinking ratio were compared with three cases, which were the pulse height based method, the pulse area based method, and the pulse time based method. Results : In the point of the shape accordance, the pulse time based method was the best, and the pulse area based method was the worst. In the point of the floating-sinking ratio, the pulse height based method was the worst, and the pulse time based method was the best. Conclusions : So, the pulse time based method was recommended for selecting the representative pulse wave. This study compared the selection methods of representative pulse using the physiological characteristics of pulse wave. Further studies are required, because the representative pulse wave is the main factor of determining the shape and the floating-sinking characteristic of the pulse wave.

• Communications for Statistical Applications and Methods
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• 제11권3호
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• pp.609-617
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• 2004

To present graph of probability densities, many softwares and graphical tools use methods that link points or straight lines. However, the methods can't display exactly and smoothly the graph and are not efficient from the viewpoint of process time. One method to overcome these shortcomings is utilizing interpolation methods. In these methods, selecting the number and location of knots is an important factor. This article proposes an algorithm to select knots for graphically presenting densities and implements graph components based on the algorithm.

• 복식
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• 제55권1호
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• pp.73-85
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• 2005

According to a rise in leisure time thanks to a five-day workweek system, the population of golf tends to rise day by day as exercise not extreme and doing together with nature, and as a sport with high concentration degree, by virtue of people who have an interest in health care and who strive to enjoy a leisure life. This study targeted the whole male and female golfers who reside in the areas of Seoul and Gyeonggi-do and are now playing golf, carried out sampling, and finally used 485 sheets for analyzing data. The study results were as follows; First, as a result of analyzing the whole lifestyle propensity depending on golfers' gender, it was shown that, as a result of making it type by factor, a male golfer was classified into shopping intention, fashion intention, family intention and tradition intention, and a female golfer was divided into shopping intention, fashion intention, family intention and man-and-woman equality intention. Second, as a result of analyzing a characteristic of gender depending on the standard of selecting goods, it showed the difference between genders as for the standard of selecting goods in case of purchasing golfwear, and it showed the difference in style/design, physique fitness, wearing of a famous golfer, convenience of laundry and management, and functionality, and male golfers were shown to select after seeing the clothes which a famous golfer did wear, compared to female golfers. Also, it could be seen that there was difference depending on the standard of selecting goods and the purchasing propensity in case of buying golfwear.