• 응용통계연구
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• 제30권3호
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• pp.453-462
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• 2017

성향점수 매칭은 관찰연구에서 처리효과 추정 시 혼란변수에 의한 편의를 줄이기 위해 자주 사용되는 방법이다. 매칭을 위해 처리군에 대응되는 대조군 선정 시 처리군의 일부가 탈락되는 경우가 발생할 수 있는데, 이로 인해 편의가 발생할 수 있다. 최근, Austin (2017)의 연구에서 이중 성향점수 보정(double propensity score adjustment)방법을 사용하는 것이 이에 대한 해결책이 될 수 있음을 제시하였다. 하지만, 처리효과 추정치의 표준오차는 이론적 추정치가 제시되지 않아 추정에 어려움이 있다. 본 연구에서는 이중 성향점수 보정 방법을 이용한 처리효과 추정치의 표준오차 추정을 위하여 두 가지 붓스트랩 방법을 제안한다. 첫 번째는 원 자료에서 성향점수 매칭 후 매칭 된 표본에서 붓스트랩 표본을 얻는 방법(simple 붓스트랩)이고, 두 번째는 원 자료에서 붓스트랩을 먼저 시행하고 각 붓 스트랩 표본에서 성향점수 매칭을 하는 방법(complex 붓스트랩)이다. 두 방법의 성능을 비교하기 위하여 다양한 상황을 가정하여 모의실험을 시행한 결과 complex 붓스트랩 방법이 경험적 표준오차와 더 가까운 값으로 추정함을 알 수 있었다. 95% 신뢰구간의 포함확률도 complex 방법을 사용했을 때 0.95에 훨씬 가까웠다. 실제 자료에 적용하였을 때에도 simple 방법은 complex 방법에 비해 표준오차를 작게 추정하였다.

• 한국과학교육학회지
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• 제37권4호
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• pp.719-730
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• 2017

본 연구는 공학 설계에 기반을 둔 연구 프로그램, 팀 프로젝트 활동 등의 통합적 STEM 연구 활동이 영재 학생들의 창의적 공학문제해결 성향과 공학에 대한 태도에 미치는 효과를 알아본 것이다. 이를 위해 Kang & Nam (2016)이 개발한 창의적 공학문제해결 성향 검사 도구와 Moon (2009)이 사용한 공학에 대한 태도 검사 도구를 본 연구 상황에 맞게 수정하여 통합적 STEM 활동의 사전과 사후에 측정 하였고, 연구 결과는 다음과 같다. 첫째, 영재 학생들의 공학 설계에 기반한 통합적 STEM 연구 활동은 창의적 공학문제해결 성향 변화과 공학에 대한 태도 변화에 긍정적 효과를 나타냈다. 창의적 공학문제해결 성향 검사지는 동기, 공학 설계, 공학적 사고 습관, 공학과 공학자, 소통 및 협업 능력 5요인으로 구성되어 있는데 모든 요인에서 유의미한 결과가 나타났다(p<.05). 창의적 공학문제해결 성향은 대부분의 요인에서 진로 희망 직업 계열과 성별 차이에 따른 유의미한 차이가 없었다. 하지만 '공학 설계' 요인에서는 남학생보다 여학생에게 효과가 있음을 알 수 있었다. 공학에 대한 태도 검사지는 공학에 대한 흥미, 공학의 난이도, 공학의 영향, 공학과 관련된 학교 교육과정, 공학과 직업에 대한 인식을 알아보는 문항으로 구성되어 있는데 모든 요인에서 유의미한 결과가 나타났지만(p<.05), 진로 희망 직업 계열과 성별 차이에 따른 유의미한 차이는 없었다.

• The International Journal of Costume Culture
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• 제7권2호
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• pp.103-111
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• 2004

The shrinkproof-finished wool fibers treated with resin coating and chlorination methods were used to find out an optimal shrinkproof finishing method keeping the quality properties of wool fabric to manufacturers. Shrinkage during repeated washing, electrostatic propensity, thermal resistance and pilling propensity of shrinkproof-finished wool knits, and analysis of finishing methods were measured. Upon the results from the surface examination of shrinkproof-finished wool fibers, the patterns of scale layer and degree of scale removal were subject to change according to the finishing processes. The shrink resistance was significantly enhanced on repeated washing of shrinkproof-finished knits, especially, chlorinated wool. Addition of strong physical force and alkali detergent applied in this washing experiment brought about superior effects with the low shrinkage rate although it was very severe washing conditions for wool fabrics. The results from the washing experiment implies that shrinkproof-finished knitted fabrics can be machine washed at individual households with other ordinary laundry. There was some changes and variation found in thermal resistance, electrostatic propensity, and pilling, however, it seems to be minor within standard limits. Therefore, shrinkproof-finished knitted fabrics did not bring serious changes to other physical properties comparing with original wool, which helps consumers handle wool knitted clothes more conveniently.

• 패션비즈니스
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• 제16권5호
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• pp.130-145
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• 2012

The purpose of this study is to investigate the influence of cause-related marketing on consumer attitude for fashion brand in terms of brand familiarity, consumer's propensity for data processing and types of advertising. The design of this study is comprised of 2(brand familiarity : high vs low)${\times}$ 2(consumer's propensity for data processing : high vs low), designed with three mixed elements. The subjects of this study are 308 male and females in twenties or thirties from the area of Seoul, Kyunggi, Busan and Daegu. Data analysis is carried out through T-test, and ANOVA. The results of this study are as follows. First, when fashion brand pursues cause-related marketing, brand familiarity, consumer's propensity for data processing and types of advertising have statistically interaction effect on consumer's preference. Second, rational appeals in advertising have no significant interaction effect on consumer's preference in terms of brand familiarity. Rational appeals are preferred to Emotional appeals in both familiar and unfamiliar brand. Third, when fashion brand pursue cause-related marketing, brand familiarity, consumer's propensity for data processing, and the types of advertising have no significant interaction effect on consumer's preference.

• 복식
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• 제48권
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• pp.37-52
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• 1999

The purpose of this study was to find out the clothing-consumption propensity(CCP) and to classify consumption types in CCP and to classify consumption types in CCP and to compare the classfied groups on their consumer characteristics among Korean female X-generation. The survey method was conducted for this study. The subjects are 477 Koran femal X-generation whose age ranges from 18 to 29 and who reside in Seoul and its adjoined areas. The span of the survey was February through March in 1998. the results were analyzed by using of SPSS/PC+package. 1. The clothing consumption motives among the female X-generation were the sensuous satisfaction for posession motive the were practical necessity of the purcahse successively in order. The clothing consumption attitude were the practical electicism the effective value the favorable attitude on low price goods toward sale items and the self-control over their consumption. 2. According to the CCP consumers were classified into five groups: electice and practical group ostentatious and extravagant group passive and economical group sensuous and practical group and sale-fond group. The respective group showed significant difference in the nine factors of the CCP. 3. Consumtion type group had significantly difference in lifestyle among consumer factor and materialistic propensity influence of economic recession follow consumption among social influence factors.

• Journal of Information Processing Systems
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• 제9권1호
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• pp.157-172
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• 2013

There are many recommendation systems available to provide users with personalized services. Among them, the most frequently used in electronic commerce is 'collaborative filtering', which is a technique that provides a process of filtering customer information for the preparation of profiles and making recommendations of products that are expected to be preferred by other users, based on such information profiles. Collaborative filtering systems, however, have in their nature both technical issues such as sparsity, scalability, and transparency, as well as security issues in the collection of the information that becomes the basis for preparation of the profiles. In this paper, we suggest a movie recommendation system, based on the selection of optimal personal propensity variables and the utilization of a secure collaborating filtering system, in order to provide a solution to such sparsity and scalability issues. At the same time, we adopt 'push attack' principles to deal with the security vulnerability of collaborative filtering systems. Furthermore, we assess the system's applicability by using the open database MovieLens, and present a personal propensity framework for improvement in the performance of recommender systems. We successfully come up with a movie recommendation system through the selection of optimal personalization factors and the embodiment of a safe collaborative filtering system.

• 한국생활과학회지
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• 제22권1호
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• pp.117-129
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• 2013

The purpose of this study is to examine the factors affecting on CRPI (capability of retirement planning and implementing) and to identify the critical point of financial factors to increase CRPI. 908 Korean individuals' data were used for descriptive statistics, t-test, F-test, and Generalized Linear Mixed Model Analysis. As a result, CRPI was influenced by attitude toward retirement planning, gender, income, and propensity to save. Some mid-group did not make a significant difference in CRPI compared to the lower-group. Men were more capable at CRPI than women in terms of sense of independence and getting a consulting service. Most consumers appear to have difficulty in calculating their retirement fund. People who have income over 3,000,000 won have dramatically greater CRPI than people who have income under 3,000,000 won. And people who have saving ratio over 23% have significantly greater CRPI than people who have propensity to save under 23%. The monthly income 3,000,000 won and propensity to save 23% were considered as critical points related to CRPI.

• 사상체질의학회지
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• 제28권1호
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• pp.11-18
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• 2016

Objectives The body shape was a key information for diagnosing the Sasang constitution (SC) in Sasang constitutional medicine. The aim of this study was to compare the body shapes and mainly focusing on the Korean and Chinese-KoreanMethods We calculated the propensity score for each SC type in males and females separately, and compared body shape including 8 circumference and 5 width between Korean and Chinese-Korean according to the sex and SC.Results Koreans have larger trunk and hip area compared to Chinese-Koreans, while Chinese-Koreans have larger abdomen compared with Koreans. Most variables were significantly different among SC types, for both Korean and Chinese-Korean. Especially, the Taeumin (TE) type has the largest body shape compared with the other SC types, it was similar between Korean and Chinese-Korean.Conclusions This study showed that the TE type has the largest body shape, followed by Soyangin (SY) and Soeumin (SE) in order, for both Korean and Chinese-Korean respectively. These results suggests that the body shape of Chinese-Korean is similar with Korean based on SC type.

• 복식문화연구
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• 제12권6호
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• pp.945-952
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• 2004

Shrink-resist effects and properties of the knitted fabrics from wool/acrylic(W/A) fiber blends were determined to find out an optimal blending ratio keeping the quality properties of wool products. The test fabrics were knitted by a weft knitting machine with all needle knitting structure ($0{\times}0$ rib) under the same knitting conditions with five different types of yarns: $W100\%,\;A100\%$, and W/A blended yarns(70/30, 50/50, 30/70). Shrinkage during repeated washing, electrostatic propensity, thermal resistance and pilling propensity of W/A knits. The shrink resistance was significantly enhanced on repeated washing of W/A knits, especially, over $50\%$ acrylic blended knits. Addition of strong physical force and alkali detergent applied in this washing experiment brought about superior effects with the low shrinkage rate although it was very severe washing conditions for wool fabrics. The results from the washing experiment implies that W/A blend knits can be machine washed at individual households with other ordinary laundry. There was some changes and variation found in thermal resistance, electrostatic propensity, and pilling. W/A 50/50 blended knits did not bring serious changes to other physical properties comparing with original wool, which helps consumers care wool knitted clothes more conveniently.

• 가정과삶의질연구
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• 제25권3호
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• pp.137-149
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• 2007

This study explores diverse consumer characteristics pursuant to whether the consumers in question have purchased luxury goods, and it also explores the variables that tend to influence such purchases. Furthermore, the relationship between consumers' purchases of, propensity for and preference toward luxury goods is researched, and an analysis is also conducted on the degrees of influence that consumer purchases of luxury goods have on consumer propensity and preference for luxury goods. The results show that the experience of such purchases determines the diverse characteristics of consumers in such areas as age, expenditures and overseas travel. In addition, the propensity of consumers to buy luxury goods is related to the tendency toward trends, self-planning, rationality and economic efficiency, while the preference of consumers is linked to the tendency toward trends, self-realization and rationality. This study aims to analyze and understand the consumer group of college women in their 20s, and it also seeks to help establish policies that will provide consumer education so badly needed by such women who are or who will be the main players of their respective household economies and rates of consumption.