• IE interfaces
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• v.11 no.1
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• pp.155-163
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• 1998

In multiparty multimedia communication, each participant not only receives information from other participants but also generates real-time data streams to distribute to others and therefore the difference between source and destination is not clear in terms of data transmission. During a teleconference session, many sub-multicast trees may be generated to exchange information to specific members within the multicast group and if those sub-multicast trees use the same fixed multicast tree, the blocking probability will be high and it is hard to provide QoS for each sub-multicast group. Also, even though there exits some shortcuts between each sub-multicast group, fixed multicast tree does not allow to use those shortcuts. Thus to overcome these problems. We propose a network resource reservation protocol and show that its effectiveness in terms of blocking probability and network resources usage.

• Journal of Korean Physical Therapy Science
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• v.21 no.1
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• pp.59-63
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• 2014

Purpose : To determined the effect of self-stretching and manual therapy on ankle joint about ROM and persisting effect. Method : Twenty participants(6 male, 14 female) ramdomly divided into self-stretching and manual therapy group. Each participant started with lunge test then self-stretching and manual therapy intervention was performed. After intervention lunge test was performed again. Last lunge test was performed after 30 minute break. Result : Result of lunge test showed both self-stretching and manual therapy group have significant difference in immediate increase of ROM and persistence effect(p<0.05). However, persistence effect of each group did not show significant difference(p>0.05). Conclusion : Manual therapy and well-designed self-stretching by therapist showed the effect in increase ROM.

• Korean Journal of Computational Design and Engineering
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• v.22 no.1
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• pp.80-88
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• 2017

Product data analytics (PDA) is a data-driven analysis method that uses product data management (PDM) databases as its operational data. It aims to understand and evaluate product development processes indirectly through the analysis of product data from the PDM databases. To educate and train PDA efficiently, this study proposed an approach that employs courses for both product development and PDA in a class. The participant group for product development provides a PDM database as a result of their product development activities, and the other group for PDA analyses the PDM database and provides analysis result to the product development group who can explain causes of the result. The collaboration between the two groups can enhance the efficiency of the education and training course on PDA. This study also includes an application example of the approach to a graduate class on PDA and discussion of its result.

• Journal of Korean Academy of Nursing
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• v.45 no.3
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• pp.459-468
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• 2015

Purpose: The purpose of this study was to investigate the effects of Wheel of Wellness counseling on wellness lifestyle, depression, and health-related quality of life in community dwelling elderly people. Methods: A parallel, randomized controlled, open label, trial was conducted. Ninety-three elderly people in a senior welfare center were randomly assigned to two groups: 1) A Wheel of Wellness counseling intervention group (n=49) and 2) a no-treatment control group (n=44). Wheel of Wellness counseling consisted of structured, individual counseling based on the Wheel of Wellness model and provided once a week for four weeks. Wellness lifestyle, depression, and health-related quality of life were assessed pre-and post-test in both groups. Results: Data from 89 participants were analyzed. For participants in the experimental group, there was a significant improvement on all of the wellness-lifestyle subtasks except realistic beliefs. Perceived wellness and depression significantly improved after the in the experimental group (n=43) compared to the control group (n=46) from pre- to post-test in the areas of sense of control (p =.033), nutrition (p =.017), exercise (p =.039), self-care (p <.001), stress management (p =.017), work (p =.011), perceived wellness (p =.019), and depression (p =.031). One participant in the intervention group discontinued the intervention due to hospitalization and three in the control group discontinued the sessions. Conclusions: Wheel of Wellness counseling was beneficial in enhancing wellness for the community-dwelling elderly people. Research into long-term effects of the intervention and health outcomes is recommended.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2000.04a
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• pp.389-393
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• 2000

Ethnography, a major research method in Anthropology, has been recently applied in human-centered design research. Since ethnography has empirical, naturalistic, holistic and eclectic characteristics, it is needed a guideline to apply ethnography into design research in accordance with a characteristic of project. Design project in which ethnography is applied can be categorized by two criteria; degree of newness of project goal(existing user-potential user) and limitedness of worksite(site-oriented-work-oriented). Among work-site activities, technology in use, and user group culture, it should be decided which content to content to focus more than others and thus what kinds of research techniques to apply in the ethnographic research.Case study was to design an interior of a Korean express train. This project is site-oriented and has an existing-potential users. Therefore, video ethnography was effectively applied to obtain chronological data of activity potential users. Therefore, video ethnography was effectively applied to obtain chronological data of activity flow, and participant observation was applied to obtain statistical data of synchronous activities. Case study shows a concrete process example of how to apply ethnography into design research.

• International Journal of Contents
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• v.9 no.1
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• pp.71-80
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• 2013

The golf industry has become the center of attention for recreational activities in the participant sport market; however, there has been little effort made to understand golf consumer and their consumption behavior using the concept of 'recreational specialization' which segments the golfers based on level of specialization in golf. The purpose of this study was to explore the differences in the relationships among perceived service quality, price of playing golf, overall customer satisfaction with the course, and a player's intention to revisit the same golf course based on the magnitude of recreation specialization in golf. Four public and two private golf courses from the southeastern state of the United States were randomly chosen from a list in a golf magazine. The 365 surveys among 417 participants were ultimately analyzed. Multiple group analysis was conducted in order to investigate differences in relationships among service quality, price, customer satisfaction, and revisit intentions between groups based on the level of recreation specialization. The key findings were 1) for more specialized golfers, satisfaction with price did not affect overall customer satisfaction or revisit intention, however, service quality significantly influenced both overall customer satisfaction and revisit intention, 2) for less specialized golfers, satisfaction with price significantly influenced overall customer satisfaction but did not affect revisit intention. Knowledge about which the determinants of satisfaction are different between more and less specialized golfers could provide a better understanding of how different marketing strategies should be implemented for different specialized levels of golfers.

• The KIPS Transactions:PartC
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• v.11C no.5
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• pp.585-594
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• 2004

When several service providers want to work together with only one master key, they need to properly distribute the key to participants who come in for the co-work business and then securely manage the distributed keys. This paper describes the system that can efficiently and securely manage the master key on the basis of the secret sharing scheme that can reconstruct original secret information as the necessity of reconstructing original secret arises. The proposed system can distribute secret information to several groups and also redistribute the secret to subgroup in proportion to the participant's security level using smart card-based (t, t)-(k, n)-threshold secret scheme for securely keeping secret information and authentication of participant's identification.

• Journal of Korean Academy of Nursing
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• v.37 no.7
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• pp.1131-1138
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• 2007

Purpose: The purpose of this study was to investigate the relationships among depression, somatic symptoms, and activities of daily living of elderly women in urban areas. Method: After obtaining participant's consent forms, a one-time, face-to-face, and private interview was conducted with each participant from Sep, 2006 to Jan, 2007 by trained graduate-level students. The questionnaire consisted of K-GDS, PHQ-15, Barthel Index, and Instrumental Activity of Daily Living. The collected data was analyzed with the SPSS/PC 12.0 program, which was used for frequency, percentage, mean, standard deviation, Pearson correlation coefficients, and multiple regression. Results: The major findings of this study were as follows 1) 34.1% of participants belonged to the depression group. 2) There were significant relationships between depression and monthly income, somatic symptoms, ADL, IADL, and number of chronic disease. 3) Significant factors influencing depression were somatic symptoms, ADL, and monthly income. Conclusion: The results of this study give useful information for designing interventions and program development for appropriate depression management and care for elderly women.

• Korean Journal of Child Studies
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• v.32 no.1
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• pp.103-123
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• 2011

The purpose of this study was to investigate infants' individual attempts at interaction with their teachers in the two-year-old class curriculum of a child care center. To achieve this aim, this study analyzed both the types of interactions that infants attempted with their teachers, as well as the underlying message contained in infants' attempts at of interacting. This study used the complete participation observation methodology following an ethnographic approach, a research method which can help us see the whole picture by tracing the main causes and connections. The participants in this study were 13 infants and their teachers in 2 two-year-old classes (Hope and Love) of the Vision Child Care Center located in G city. The researcher, who was also a Hope-class teacher, ad as an observer, and the Love-class teacher acted as an assistant observer. Participant observation was made everyday except the days when field trips and group activities wewe planned, from october 2009 to January 2010. A variety of methods were used to collect materials, such as participant observation, in-depth interviews and collection of documents.

• Journal of the Korean Society of Food Culture
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• v.34 no.5
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• pp.577-586
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• 2019

The Ministry of Agriculture, Food and Rural Affairs has conducted the Dietary Education Projects at Childcare Centers since 2015. This study provides preliminary data for early childhood dietary education programs, by evaluating the outcomes of the projects. This survey enrolled 212 participants whose children had participated in the projects, and 142 non-participants. Comparing the perception of importance towards each educational program of the projects, dietary education program gained significantly higher importance than other subjects included, and was significantly higher in the participants than in non-participants. In the preference for food group survey for children, vegetable and seaweed preferences were higher among participants than non-participants, indicating that participation in the dietary education projects contribute towards increase in preferences for vegetables and seaweed, which children generally dislike. No significant differences were observed in children's dietary habits between participant and non-participant groups, thereby suggesting that the education projects were insufficient for inducing dietary habit changes. In order to accomplish effective improvement of dietary habits, the education projects need further improvements to achieve systematic and long-term plans.