• Communications for Statistical Applications and Methods
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• v.17 no.6
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• pp.909-916
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• 2010

A trend in software reliability engineering is to take into account the coverage growth behavior during testing. A coverage growth function that represents the coverage growth behavior is an essential factor in software reliability models. When multiple competitive coverage growth functions are available, there is a need for a criterion to select the best coverage growth functions. This paper proposes a selection criterion based on the prediction error. The conditional coverage growth function is introduced for predicting future coverage growth. Then the sum of the squares of the prediction error is defined and used for selecting the best coverage growth function.

• Analyses & Alternatives
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• v.4 no.1
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• pp.105-123
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• 2020

This study analyzes the risk selection behavior of Japanese households. The study approaches the view of 'the hyperbolic discount' which is used in behavioral economics based on the rise in mortgage lending by low-income households in the late 2000s. The study focuses on how households risk preferences vary by income levels. The study analyzes the relationship of attitude of household interest rate risk using Binomial Logistic and Heckman two-step estimation method assuming that there are only two types of Adjustable-Rate Mortgage and Fixed-Rate Mortgage. As a result of the empirical analysis, low-income households annual income tend to have a higher proportion of housing debt as same as higher interest rate risk preferences households in proportion to income growth and interest rate risk preferences. Those results indicate that there is possibility of a hyperbolic discount on low-income households in Japan, and support the hypothesis that low-income households are relatively higher household debt ratio because of high utility due to home purchase in the near future (short-term).

• 제어로봇시스템학회:학술대회논문집
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• 1997.10a
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• pp.124-127
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• 1997

In this paper, we propose a method of cooperative control based on immune system in distributed autonomous robotic system(DARS). Immune system is living body's self-protection and self-maintenance system. Thus these features can be applied to decision making of optimal swarm behavior in dynamically changing environment. For the purpose of applying immune system to DARS, a robot is regarded as a B lymphocyte(B cell), each environmental condition as an antigen, and a behavior strategy as an antibody respectively. The executing process of proposed method is as follows. When the environmental condition changes, a robot selects an appropriate behavior strategy. And its behavior strategy is simulated and suppressed by other robot using communication. Finally much simulated strategy is adopted as a swarm behavior strategy. This control scheme is based on clonal selection and idiotopic network hypothesis. And it is used for decision making of optimal swarm strategy.

• Proceedings of the KIEE Conference
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• 1997.07c
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• pp.883-885
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• 1997

High impedance fault(HIF) is random in its behavior even in a similar environment. The detection of Ire HIF has focused on the development of algorithms based on harmonic, parameters of the arc currents. However, a fact that proper selection of the harmonic parameters, rather than algorithm selection, is more important is shown in this paper by applying three different performance evaluation methods on two HIF detection algorithms using eight harmonic parameters.

• Korean Journal of School Psychology
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• v.17 no.1
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• pp.1-16
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• 2020

This study aims to investigate peer socialization processes on early adolescents' prosocial behaviors in friendship networks. A longitudinal social network model (SIENA) was used to disentangle socialization process in prosocial behavior. Participants were fourth and fifth graders in South Korea from 39 elementary school classrooms (N=1,040, 48% girls). According to results, students select friends based on similarity in prosocial behavior (peer selection) was found in both prosocial behaviors. Peer influence effects were also observed in prosocial behaviors. Also, moderating effect of social relatedness was significant. In classes with high social relatedness, influence effect of prosocial behavior was significant. As a contrast, prosocial behavior was not socialized in classes with the low social relatedness. Results suggest that peernetwork play a critical role in the co-evolution of friendships, and prosocial behaviors. Findings yielded the importance of the socialization process and promoting healthy peer socialization environment.

• Journal of the Korean Home Economics Association
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• v.33 no.4
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• pp.279-288
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• 1995

The purpose of this study was to compare clothing attitude and clothing purchase behavior of two age groups of adult men,- college students and middle aged. Four aspects of clothing attitude (fashion interest, status symbol, conformity, practicality/comfort) were assessed with 20 Likert type questionnaires adapted from the previous researches. Four aspects of purchase behavior(information sources used, store patronage, importance of store attributes, clothing selection creteria for occasions) were measured with forced choice questionnaire developed or adapted from previous researches. The questionnaire were administrated to 512 male college students and middle aged men. The data were analysed using frequency, percentage, and t-test. The major findings drawn from this study were as follows : 1. Clothing comfort among four aspects of clothing attitude according to the age group was that middle-aged men showed higher conformity than college students. 2. For the information source for apparel purchase, college students used consumer dominated information source while middle-aged men used market dominated information source. 3. For apparel purchase, students preferred brand franchise store, and factory outlet/off-price store, while middle-aged preferred department store and custom-made. Among six store attributes, convenience and price were the most important attributes to the students, while convenience and high quality to the middle aged. 4. The most important clothing selection creteria for formal occasion (job interview, wedding ceremony) was dignity. Comfort/practicality were important creteria for both of leisure occasion and daily attendance (office, school).

• Journal of the Korean Society of Clothing and Textiles
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• v.19 no.3
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• pp.416-425
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• 1995

The purposes of this study were to identify buyers' need criteria on product/vendor selection criteria of apparel buyers in department store and to investigate the relatonships among buyers' need criteria, information search behavior, types of buying task and influential factors on buying behavior of buyers(individual characteristics, organizational characteristics, and customer perception characteristics). A questionnaire was developed to measure research subjects based on theoretical study empirically. The questionnaire was administered to 159 apparel buyers of 11 department stores in Seoul. The results of empirical studies were summarized as follows. 1. The need criteria of buyers on product/vendor selection criteria were classified into five types : vendor characteristics; quality characteristics; price characteristics; brand characteristics; product characteristics and the need criteria differed significantly by influencing factors on buying behavior of buyers. 2. There were no relationships between information types and amounts of information search but information types differed significantly by need criteria and individual characteristics 3. Types of buying task were significantly different according to need criteria of buyers and organizational characteristics. 4. Buying policy of department store was significantly different according to organizational characteristics.

• Journal of the Korean Home Economics Association
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• v.39 no.3
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• pp.1-10
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• 2001

The Purpose of this study was to investigate the relationship between materialism and clothing buying behavior (clothing shopping orientation, clothing selection standards, use of information sources, store selection standards, purchase and purchase intention of imported clothing). The data were obtained from questionnaires completed by 400 women in the Taegu area whose age was 20 years and older. The SPSS/PC$^{+}$ package was used for data analysis which included a test of reliability, frequency, percentage, factor analysis, t-test, and x$^2$ test. There were significant differences in clothing buying behavior between groups who had a higher tendency and a lower tendency toward materialism. In other words, those who had a higher tendency toward materialism enjoyed their shopping and pursued the world-known brands, imported brands, the latest fashions, and conspicious consumption more than those who had a lower tendency of materialism. The former put a greater focus on the latest fashion styles, brand image, and design then the latter when the\ulcorner bought clothing. Those who had a higher tendency toward materialism utilized more information sources than those who had a lower tendency. The former made purchases from the stores where they stock famous world-known brands and well-advertised stores, and had a greater purchase intention of imported clothing than the latter. In the purchase of imported clothing there was no significant difference between two groups.s.

• The Journal of Industrial Distribution & Business
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• v.9 no.4
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• pp.7-17
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• 2018

Purpose - This study aims to investigate domestic wine consumption behavior and make future sales strategies and marketing plans. Research design, data, and methodology - To achieve the purpose of the study, the surveys were conducted targeting 350 wine customers in Jeju and Seoul. 331 responses were collected, and out of them, 21 responses were deleted because they lacked the proper information fill in. A descriptive statistical analysis was applied to the remaining 310 responses. The statistical techniques used for carrying out hypothesis-testing are EFA_(exploratory factor analysis), multiple-regression analysis, and moderating effect in SPSS 18.0. Results - The results indicate that fashion oriented, sociality aspiration and rationality seeking lifestyles had significant influence upon internal attributes. However, well-being oriented and having enjoyment oriented lifestyle had no significant influence upon internal attributes. Furthermore, all the types of lifestyles except social aspiration lifestyles had a positive influence upon external attributes, whereas internal or external attributes had positive influence on customer satisfaction. Conclusions - The consumers who experienced wine purchases think wine selection attributes differ before and after experiencing wine drinking, and it shows that the circumstantial variables as purchase situations prove to be important predicted variables in the behavior field of wine consumers. It implies appropriate wine education according to the consuming trend about wine for wine consumers are needed.

• Journal of the Korean Society of Clothing and Textiles
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• v.20 no.5
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• pp.769-782
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• 1996

This study intends to contribute to developing an effective marketing strategy targeting women in their 40's and 50's by classifying them into social classes and analyzing their wearing and purchasing behavior. The subject of this study are 344 women in their 40's and 50's living in Seoul, and the model sampling is done by allotment sampling. Modified survey based on references and former studies is used, and SAS package is used for analysis. The results of data analysis are as follows: 1. Women in their 40's and 50's are classified into 3 social classes, and the most influencial factor in the classification of social class is found to be total monthly income. 2 Clothing image of which each social class wear are proven to be significantly different among 3 classes. However, specific garment styles they wear are proven not to be significantly different. 3. Clothing purchasing behavior factors such as informants, clothing selection standards, store selection standards, place of purchase, shopping time, frequency of purchase, price of purchase, and paying methods are proven to be significantly different among 3 social classes. 4. Marketing strategies for each social class are provided based on these results.