• Proceedings of the Korean Operations and Management Science Society Conference
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• 2005.05a
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• pp.629-638
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• 2005

In this paper, we consider two issues in collaborative filtering, which are closely related with the number of ratings of a user. First issue is the relationship between the number of ratings of a user and the performance of collaborative filtering. The relationship is investigated with two datasets, EachMovie and Movielens datasets. The number of ratings of a user is critical when the number of ratings is small, but after the number is over a certain threshold, its influence on recommendation performance becomes smaller. We also provide an explanation on the relationship between the number of ratings of a user and the performance in terms of neighborhood formations in collaborative filtering. The second issue is how to select an initial product list for new users for gaining user responses. We suggest and analyze 14 selection strategies which include popularity, favorite, clustering, genre, and entropy methods. Popularity methods are adequate for getting higher number of ratings from users, and favorite methods are good for higher average preference ratings of users.

• Korean Journal of Human Ecology
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• v.15 no.6
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• pp.1063-1071
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• 2006

Fetishism, which has been a taboo for a long time, is stimulating the modem people's emotions by being reborn as a fashion trend by a number of designers like Jean Paul Gaultier, Vivienne Westwood and Claud Montana. Especially, Jean Paul Gaultier, called the bad boy of the fashion industry, is leading the Paris fashion world by expressing his unique fetish elements with his fantastic and uncommon ideas-males' wearing of skirts, wearing underwear like outer garments. Therefore, this study is aimed at investigating how his fetishism is shown in his works, understanding his fetish fashion world in the modem fashion and offering a new stepping-stone for fashion designers to actively participate in new fashion areas. Its results are as follows. First, it was found that the sensual designer Jean Paul Gaultier has been expressing his unique fetish elements in his collections like the following three styles of fetishism-fetishism by physical emphases, fetishism by items, fetishism by material. Second, the symbols of voluptuous beauty reflecting his own fetishism could be found in his movie costumes, license areas and given plots. Third, the work describing Jean Paul Gaultier's fetishism as a fetish image with the concept of Fantasy of Missing was evaluated as a successful work to express an internal sexual desire.

• Korean Institute of Interior Design Journal
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• v.22 no.3
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• pp.81-90
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• 2013

There has been current trend running through each generation. All the leading areas in the fashion, art, architect industries etc. are absorbing the needs of the mass users and getting popular and high attentions from the society. One of recent trends are the interior design utilizing the aged style of materials such as bricks, antique and vintage objets. It is applied not only for the cafeteria, movie theater, museum but the cultural space. It reflects the brand-new and Utopian interpretation of design longings for the nostalgia and the old ages. This goes back to the picturesque aesthetics in the 1980s. The term "picturesque" means "picture-like". And it originated from the Utopian vision taken from the landscape paintings of English aristocrat's trip to Europe. it mainly reflects people's longing for the nostalgia and their the happy days in the past. In recent days of bad economies, it has been found in various areas from people's desire for the prosperity in the last days. The objective of this study is to examine the up-current trend of picturesque aesthetics and see its characteristics and how it can be applied to the interior design. And the feasibility study for the necessity of the picturesque aesthetics, any spatioperceptual elements and capable space for human beings to be made for an eclectic space in the desolate modern day life.

• Korean Management Science Review
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• v.25 no.1
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• pp.123-138
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• 2008

Recently, DMB service markets experience a rapid change with terrestrial DMB test-broadcasting for the nation-wide coverage and paid interactive data broadcasting being offered utilizing TPEG and BIFS technologies. This warrants a reexamination of a consumers' adoption intentions for DMB service. This paper uses a survey data set to analyze DMB adoption intentions and the choice between terrestrial DMB and satellite DMB services according to preferred contents and other media usage characteristics. Empirical results show that consumer who prefer TV, music, and movie contents are more likely to adopt DMB service, whereas consumers with high intentions for HSDPA subscription are less likely to adopt DMB service. This implies that continuing development of killer application and the analysis of substitutes or complements of other media are crucial for the increase of DMB adoption intentions. It is found that the more consumers prefer sports, movies and entertainment/game and put higher values in the quality of the contents, the more likely they adopt satellite DMB service. Meanwhile, the more consumers prefer TV, drama and news contents, and are sensitive to the subscription fees, they are more likely to adopt terrestrial DMB service. Therefore, it seem that consumers' DMB adoption between terrestrial and satellite services is crucially related with types and characteristics of contents offered.

• Korean Institute of Interior Design Journal
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• v.14 no.1
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• pp.81-90
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• 2005

This study was intended to suggest the design guidelines of digital home on the basis of digital-related human behavior. In order to achieve this, what and how often internet was used in the home, how living pattern and space usage was changing according to digitalization were examined and lastly, the design guidelines of digital home based on these findings were suggested. The subjects were 400 housewives who lived In 85m'-sized housing unit of the new apartment complex in Busan. They were average age of 38 and their eldest children were in the stage of elementary schooling or preschooling. Many of them had relatively high educational level and middle income level. The results of the study were as follows; 1) The respondents used internet more frequently for information searching, children's education, and Internet shopping. Therefore, it would be desirable to divide zoning of housing unit into space for routine activities, space for working, and for cultural activities. 2) Digitalization changed human living pattern like follows; it reduced time of shopping, information searching, banking, and going out. Also, it increased time of spending alone, watching movie, and playing game. Therefore, digital home should be designed to facilitate social Interaction between family members, cultural and recreational activities, and indoor or outdoor exercise within each housing unit or in apartment complex.

• Korean Institute of Interior Design Journal
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• v.18 no.2
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• pp.71-79
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• 2009

It is the youth period that the personality is shaping gradually. The residential environments have influence on the young ego. Especially residential design should include more youth friendly design elements than any other facilities. The purpose of this study was to provide the youth friendly design elements about the space design of apartment through analysis of youth's needs. This study was progressed to the survey method about five districts of apartment design competitions in 2007. The collected cases are analyzed by using statistics software SPSS for windows release 11.0. The result of the study was as below. First, the youth satisfaction of current residential space got more satisfied as floor space got larger. Second, most of youth uses them own room that is satisfied with their floor space for sleeping, inviting friends, studying, playing activities. Third, generally youth preferred to place their own room not far from the restroom, but the result of distance between master room and entrance was classified depend on sex, personal inclination, and residence environment, also generally satisfied with volume of their room. Fourth, for the restroom, although it is too small that satisfied with bath facilities relatively. And cast, youth's preferred room for extra was 'movie/music room', 'game room' and 'dress room' which is higher preference than 'study room'.

• Journal of Korean Institute of Industrial Engineers
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• v.22 no.2
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• pp.265-276
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• 1996

Multimedia systems present information by various media, for example, video, sound, music, animation, movie, etc., in addition to the text which has long been used for conveying the information. Among many multimedia applications, the multimedia information retrieval systems commercialized in the forms of multimedia encyclopedia CD-ROMs, benefited from various media for their ability to present information in an efficient and complete way. But using several media, on the other hand, may cause end users' confusion and furthermore, poorly designed user interface often exacerbates the situation. In this study, the multimedia systems were studied from the standpoint of usability. The conceptual framework of the user interface of the multimedia system was newly defined. And 100 initial variables for user interface design of general multimedia systems were suggested through literature survey and expert opinions based upon the framework developed. Among various application areas, the multimedia information retrieval systems were chosen for investigation, and 36 variables particularly relevant to user interface of the multimedia information retrieval systems were selected. According to the sequential research strategy, the variables that were considered to be most important were finally selected through a screening stage. A part of selected variables were verified through a human factors experiment as the first step of sequential research. Based upon the result of the experiment, guidelines for user interface design were provided. For future study, the variables remained will be Investigated and the study will expand to another application areas.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.66 no.8
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• pp.1257-1264
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• 2017

In video content watching service, when a user requests video content, the content server has to transmit the entire video to the client for watching. This transmission delay increases as the size of video content increases. In order to solve the transmission delay problem, a prefetching technique can be used in which a video content to be watched by a user is predicted and transmitted to a client before the user requests it. In this paper, we propose a prefetching system considering multiple indices for video content. In the proposed method, video content to be prefetched is selected by comprehensively analyzing the order relation index indicating the order of viewing the videos of the users, the similarity index between the video contents, and the popularity index reflecting the viewing frequency of the video content. Experimental results show that the maximum accuracy is achieved when prefetching uses only the order relation index for movie contents.

• Journal of Korean Physical Therapy Science
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• v.25 no.2
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• pp.62-72
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• 2018

Background: The purpose of this study was to investigate a study about undergraduate students' participation in general sports. Method: A questionnaire survey was conducted on 200 students attending physical therapy at Gimcheon university students. four items of general characteristics, 2 conditions of sports for all, 2 activities of current sports for all, and 1 thing of sports for all, were extracted from the questionnaires of total 40 items. Result: In the present study, it was found that through the cross-sectional analysis of various variables related to life sports activities according to grade, sex, age and living cost level, students participated in less sports activities than other college students. And they participated in non-living sports activities such as appreciation and movie appreciation. In addition, it was found that factors such as watching sports games mainly affect the lives of women, especially with less sports activities, and men are more active at 20 to 28 years of age than those aged 20. Conclusion: These findings suggest that it is necessary to provide various opportunities to encourage the physical activities of female students and young students of the university and actively participate in sports for all.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.41 no.7
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• pp.768-774
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• 2016

This paper deals with a method to recommend the combination of items as a group according to similarity to handle application area such as fashion and cooking, while the previous methods recommend single item such as a book, music or movie. Collaborative filtering is a method to recommend an item selected by users with similar tendency based on similarity between users. In this paper, the proposed method generates a set of frequent items based on collaborative filtering and association rules and recommends a group by similarity between groups. To show the validity of the proposed method, experiments are performed with purchase data collected from e-commerce for four months.