• Journal of information and communication convergence engineering
• /
• v.12 no.2
• /
• pp.116-121
• /
• 2014

This paper discusses computer-generated heuristics for motion planning. Planning with many degrees of freedom is a challenging task, because the complexity of most planning algorithms grows exponentially with the number of dimensions of the problem. A well-designed heuristic may greatly improve the performance of a planning algorithm in terms of the computation time. However, in recent years, with increasingly challenging high-dimensional planning problems, the design of good heuristics has itself become a complicated task. In this paper, we present an approach to algorithmically develop a heuristic for motion planning, which increases the efficiency of a planner in similar environments. To implement the idea, we generalize modern motion planning algorithms to an extent, where a heuristic is represented as a set of random variables. Distributions of the variables are then analyzed with computer learning methods. The analysis results are then utilized to generate a heuristic. During the experiments, the proposed approach is applied to several planning tasks with different algorithms and is shown to improve performance.

• Journal of the Korean Home Economics Association
• /
• v.40 no.1
• /
• pp.99-112
• /
• 2002

The purpose of this study was to examine characteristics of online consumer groups by information seeking type and to identify the variables influencing consumers'purchase intention of internet fashion product shopping by consumer groups. A questionnaire was administered to 456 adults who had purchasing experience at fashion outline shopping mall. SPSS 9.0 package was used for data analysis. Factor analysis, ${\chi}^2$-test, t-test, frequency, percentage, one-way ANOVA and stepwise regression analysis were utilized. The online store attribute dimensions of fashion online shopping main were tangibility, variety, marketing promotion, responsiveness, reputation, price and convenience. The online store attributes had directly different influences in the purchase intention of Internet fashion product shopping by online consumer groups. Outline information seeking type who had higher variety and reputation perceptions had more positively affected on the purchase intention of internet fashion product shopping. Offline information seeking type who had higher tangibility and variety perceptions had significantly positive influence on the purchase intention of it. Combination(online+offline) information seeking type who had higher price and responsiveness perceptions had positive impact on purchase intention of it.

• Journal of the Korean Society for Precision Engineering
• /
• v.12 no.1
• /
• pp.87-96
• /
• 1995

A new fungivle material named Epoxy-Granite composite is applied to the column structure of drilling center in order to investigate the advanced dynamic charateristics comparing with a conventional cast iron material. The dimensions of new column structure are adjusted to keep the same stiffness (EI value) and the manufacturing conditions are formulated based on the preceeding research experience about the development of Epoxy-Granite structural material. The two kinds of experiments are set up, one of which is for the measurement of natural mode and frequency using experimental modal analysis, and the other one is for the measurement of vibration amplitude during idling operation of a machine tool. The comparison of maximum accelerance values at each natural frequency of bending mode shows a Epoxy-Granite column have larger modal damping ratios(over 2times) than a cast iron column. The vibration amplitude of Epoxy-Granite column measrued on the bed, motor base, and top of column are also much smaller (up to 12%) than the case of cast iron column. It is therefore confirmed that a Epoxy-Granite material exhibits a good anti- vibrational propderty even if it is used under the actual operational environments of machine tool as a practical structural element.

• The Mathematical Education
• /
• v.55 no.4
• /
• pp.397-416
• /
• 2016

This study analyzed the quality of mathematics classes with observations using the instrument, MQI(Mathematical Quality of Instruction). Class recordings and interviews were conducted on 2 pre-service teachers and 4 in-service teachers. This study recorded and analyzed 3 or 4 classes for each mathematics teacher by using revised MQI. There were a total of 8 raters: 2 or 3 raters analyzed each class. MQI has four dimensions: Richness of the Mathematics, Working with Students and Mathematic, Errors and Imprecision, Student Participation in Meaning-Making and Reasoning. In the dimension of 'Richness of Mathematics', all teachers had good scores of 'explanations of teacher' but had lower scores of 'linking and connections', 'multiple procedures or solution methods' and 'developing mathematical generalizations.' In the dimension of 'Working with Students and Mathematics', two in-service teachers who have worked and having more experience had higher scores than others. In the dimension of 'Errors and Imprecision', all teachers had high scores. In the dimension of 'Student Participation in Meaning-Making and Reasoning', two pre-service teachers had contrast and also two in-service teachers who hadn't worked not long had contrast. Implications were deducted from finding to improving quality of mathematics classes.

• Proceedings of the Korean Society for Quality Management Conference
• /
• 2010.04a
• /
• pp.218-225
• /
• 2010

Learning Organization is a learning based community to make the most important value in the era of Knowledge Economy, Creation. That's why people share, facilitate personal, individual's knowledge & experience systems each other and make good thoughts & ideas in the organization. This study measures the building practices having conducted the F team in Samsung electronics using DLOQ that indicates the activate degree of Learning Organization and the quantitative degrees of Learning Organization through comparing the cross-evaluation between the already measured companies in addition to analyzing the F team's success factors. Learning Organization requires sustainable and continuous activity, nor completes by changing many factors with human resources. The study will have the achievement if we measure the successful activity through global companies built a Learning Organization and facilitate the improvement activity sustainably.

• Journal of the Ergonomics Society of Korea
• /
• v.31 no.6
• /
• pp.715-723
• /
• 2012

Objective: The aim of this study is to investigate haptic perception related researches into three perspectives: cutaneous & proprioceptive sensations, active & passive touch, and cognition & emotion, then to identify issues for implementing haptic interactions. Background: Although haptic technologies had improved and become practical, more research on the method of application is still needed to actualize the multimodal interaction technology. Systematical approached to explore haptic perception is required to understand emotional experience and social message, as well as tactile feedback. Method: Content analysis were conducted to analyze trend in haptic related research. Changes in issues and topics were investigated using sensational dimensions and the different contents delivered via tactile perception. Result: The found research opportunities were haptic perception in various body segments and emotion related proprioceptive sensation. Conclusion: Once the mechanism of how users perceives haptic stimuli would help to develop effective haptic interactrion and this study provide insights of what to focus for the future of haptic interaction. Application: This research is expected to provide presence, and emotional response applied by haptic perception to fields such as human-robot, human-device, and telecommunication interaction.

• Journal of the Korean Society of Clothing and Textiles
• /
• v.26 no.9
• /
• pp.1378-1389
• /
• 2002

This study was to identify dimensions of subjective knowledge and to test the structural model of the effect of subjective knowledge on information search and evaluation rules for apparel products. A questionnaire was administered to 668 females living in Seoul, Taejon, and Cheongju, and the data were analysed by using LISREL 8. The results of this study were as follows: First, consumers' subjective knowledge regarding apparel products consisted of five factors; Style knowledge, Fashion Knowledge, Store Knowledge, Fabric/Management Knowledge, and Brand knowledge. Those factors were influenced by the experience related with apparel products. Second, the subjective knowledge influenced information searches. That is, internal search was significantly influenced by fashion knowledge and store knowledge, while external search was significantly influenced by fashion knowledge and fabric/management knowledge. Third, the subjective knowledge had indirect effects on evaluation rules via search activities (e.g., internal and external), suggesting that the internal search was mediated in relationship between subjective knowledge and compensatory rule, while the urtemal search was mediated in the relationship between subjective knowledge and noncompensatory rule. Therefore, this study implies that subjective knowledge plays an important role to explain consumers' decision making processes such as information search and evaluation.

• Journal of the Korean Society of Clothing and Textiles
• /
• v.27 no.11
• /
• pp.1179-1189
• /
• 2003

This study had a focus on service quality, customer satisfaction and relationship orientation. The subjects of this study were: 1) to examine the conceptual structure of service quality perceived by males consumers of character clothing brands, 2) to examine of the service quality on customer satisfaction, and 3)to examine relationship between customer satisfaction and relationship orientation. The questionnaire was collected between October, 28 and November, 8 in 2002. Samples of 271 respondents were obtained. The sample consisted of males in their twenties and thirties who had a experience on buying character clothing brands in Seoul. To analyze the data, reliability analysis, percentage, frequency analysis, factor analysis, correlation analysis, and regression analysis were applied. The results were as followings: 1) As a result of factor analysis, the service quality were identified by four dimensions: environmental service, personal service, products service, and promotion service. 2) As a result of correlation analysis and regression analysis, the service quality had a positive influence on customer satisfaction. Especially products service was the most important factor for customer satisfaction, followed by environmental service. 3) As a result of correlation analysis, customer satisfaction had a positive influence on relationship orientation.

• Journal of the Korean Home Economics Association
• /
• v.43 no.7 s.209
• /
• pp.79-91
• /
• 2005

The purpose of the study was to examine the current status of financial management behaviors of college students and to determine the affecting factors. The data were collected from 481 college students in Busan and Kyungnam areas by a self-administered questionnaire. Frequencies, Cronbach's alpha, factor analysis Pearson's correlation analysis and regression analyses were conducted by SPSS WINDOWS. The results from this study were as follows. first, the mean of preparation for the future was the highest among 5 dimensions of money attitudes, whereas the mean of the ostentatious means was the lowest. In addition, the college students showed good practices in drawing up shopping lists, budgeting, and keeping receipts, but bad practices in short-term and long-term planning. Second, many factors such as gender, grade, mother's education, fathers' occupation, and mothers' occupation were significant in the regression analyses for the financial management behaviors. Especially, money attitudes and experience of consumer education were significant in many categories of financial management behaviors. In combination, these results suggest that financial management education for college students should be conducted, and that contents related to value should be included in the education program.

• Fashion & Textile Research Journal
• /
• v.18 no.6
• /
• pp.825-832
• /
• 2016

The purposes of this study was to investigate effects of fashion brand apps on smartphones flow and consumer satisfaction in mobile shopping. These findings provide new information to marketers for the marketing strategy for dealing with mobile shopping mall. A total of 233 usable questionnaires were obtained from men and women ages 20-30 who have mobile shopping purchasing experience. Data were analyzed by frequency analysis, factor analysis using SPSS for Window 22.0 and confirmatory factor analysis and structural equation model analysis by AMOS 22.0. The results were as follows. First, the analysis of fashion brand apps factors showed that it consist of 2 kinds of dimensions of basic information type and additional information type. Second, basic information type of fashion brand apps have had a direct impact on consumer satisfaction and did not affect the smartphones flow. Additional information type influence consumer satisfaction through a smartphones flow. Basic information type of fashion brand apps showed a greater impact on consumer satisfaction than a smartphone flow. A managerial implication was discussed for fashion brand marketers to develop strategies on fashion brand apps that could stimulate and increase the consumer flow and satisfaction.