• 산업경영시스템학회지
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• 제36권1호
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• pp.64-69
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• 2013

In ubiquitous computing, shared environments adjust themselves so that all users in the environments are satisfied as possible. Inevitably, some of users sacrifice their satisfactions while the shared environments maximize the sum of all users' satisfactions. In our previous work, we have proposed social welfare functions to avoid a situation which some users in the system face the worst setting of environments. In this work, we consider a more direct approach which is a preference based clustering to handle this issue. In this approach, first, we categorize all users into several subgroups in which users have similar tastes to environmental parameters based on their preference information. Second, we assign the subgroups into different time or space of the shared environments. Finally, each shared environments can be adjusted to maximize satisfactions of each subgroup and consequently the optimal of overall system can be achieved. We demonstrate the effectiveness of our approach with a numerical analysis.

• 전자공학회논문지
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• 제50권4호
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• pp.108-116
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• 2013

최근 GPU 시스템과 같은 수백 개의 프로세서로 구성된 대규모 병렬 시스템을 이용하여 성능을 향상시키는 방법들이 많이 개발 되었다. 대표적으로 GPU에서 캐싱(Caching)과 유사한 개념으로 공유 메모리가 사용되었다. 출력 값을 얻기 위해서 이웃 값을 참조하는 이미지 필터와 같은 알고리즘들의 경우 이웃 값의 참조가 빈번하게 발생되므로 공유 메모리를 사용할 경우 성능이 향상되었다. 그러나 공유 메모리를 사용하기 위해서는 기존 코드를 재 구현해야만 하고 이는 코드의 복잡도를 증가시키는 원인이 된다. 최근 GPU 시스템에서는 공유 메모리 뿐 아니라 L1과 L2 캐시 메모리를 지원하도록 하였다. L1 캐시 메모리는 공유 메모리와 동일한 하드웨어에 위치하여 캐시의 사용이 성능향상을 도와줄 것으로 예측된다. 따라서 본 논문에서는 캐시 메모리와 공유 메모리의 성능을 비교하였다. 연구결과 성능 면에서 캐시 메모리를 사용한 알고리즘과 공유메모리를 사용한 알고리즘은 유사하였다. 특히 캐시 메모리를 사용하는 경우 공유메모리 사용 프로그래밍에서 나타나는 코드 복잡도의 증가 문제도 동시에 해결할 수 있었다.

• 지식경영연구
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• 제14권3호
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• pp.55-85
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• 2013

The present study examines the effects of transformational leadership exercised by team leader and transformational leadership shared by team members on team creativity and team performance at the team level. A growing body on leadership research highlights the role of team leadership in work organizations. In team settings, studies have focused exclusively on individual leaders who occupy formal leadership positions and exercise vertical influence over team members. In contrast to this traditional approach, shared leadership highlights a horizontal influence process where leadership is collectively carried out by team members. In this shared form of leadership, members actively participate in the leadership process and horizontally influence other team members. This mutual influence among team members constitutes a critical condition for the success of team-based organizations. The ability of team members to work together as a team is the key to the overall functioning of the team organization. To verify the effect of two leadership styles, we analyze the effect of a leader's transformational leadership and members' shared transformational leadership on team creativity and team performance for the same team. This study also predicts that the transformational leadership shared by members will moderate the effects of leader transformational leadership on team performance and creativity. Our findings show that both leaderships have a positive effect on team performance. However, the main effect of a leader's transformational leadership on team creativity is not significant when members' transformational leadership is employed into the model. With the effect of leader transformational leadership controlled for, the main effects of the transformational leadership shared by members on team creativity and performance are significant. In addition, we also found the significant moderation effects of member transformational leadership by leader transformational leadership on team creativity. Based on these findings, we strongly recommend that team based organizations shift the leadership focus from the leader focused leadership model to the shared leadership model. We also discuss managerial implications of our findings in details.

• 한국콘텐츠학회논문지
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• 제18권6호
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• pp.574-599
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• 2018

본 연구는 기업에 근무하는 구성원을 대상으로 리더의 공유리더십과 조직구성원의 혁신행동에 대한 인식에서 학습지향성과 폐기학습이 미치는 영향을 분석함으로써 리더의 공유리더십의 중요성에 대한 시사점을 제시하는데 그 목적이 있다. 본 연구의 설문조사는 국내 중소기업에서 지식근로자로 근무하고 있는 조직구성원을 대상으로 실시하였고, 회수된 설문지중 총 387개를 SPSS 24.0 통계패키지를 사용하여 통계분석 방법을 실시하였다. 연구결과, 리더의 공유리더십과 혁신행동, 공유리더십과 학습지향성 그리고 학습지향성과 혁신행동에 정(+)의 영향을 미쳤다. 또한 학습지향성은 공유리더십과 혁신행동의 관계에서 매개역할을 하였으며, 폐기학습은 공유리더십과 학습지향성의 관계를 강화하였다. 본 연구결과가 함의하는 바는 조직구성원의 혁신행동을 향상시키기 위해서는 조직구성원 스스로가 적극적인 폐기학습과 학습지향성 향상을 위한 지속적인 강화 활동이 필요하다. 또한, 조직구성원과 조직에 대한 리더의 공유리더십이 더욱 중요하다는 결과를 보이고 있다.

• 한국ITS학회 논문지
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• 제20권1호
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• pp.40-53
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• 2021

공유 전동킥보드는 기존 'station 기반의 공유 교통서비스에 비해 편리한 dockless 방식으로 제공되어 이용이 급격하게 증가하고 있다. 이에 따라 교통사고, 보행환경 저해 등 새로운 도시문제가 발생하고 있다. 본 연구에서는 서울시를 대상으로 최근 급격하게 성장하고 있는 공유전동킥보드의 이용 특성을 분석하고, 음이항 회귀모형을 통해 서울시 집계구 단위의 공유 전동킥보드 이용수요에 영향을 미치는 요인에 대하여 규명하였다. 이용특성 분석결과 평균 이용거리는 1.5km, 이용시간은 9.4분, 이동속도는 10.3km/h로 나타났다. 공유 전동킥보드의 이용수요에 대한 영향요인을 살펴보면, 인구지표, 교통시설지표, 토지이용지표, 기상지표가 통계적으로 유의하게 영향을 미치는 것으로 분석되었다. 본 연구의 결과는 향후 공유 전동킥보드의 이용수요가 많은 지역에 대한 효율적인 운영 및 이용 활성화를 위한 교통정책 수립의 기초자료로 활용될 수 있을 것으로 기대된다.

• KIEAE Journal
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• 제15권1호
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• pp.29-43
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• 2015

Shared housing for elderly people, where several elderly people live together, gains attention as a means to prevent the lonely death of elderly people and continuously maintain their social relations. The purpose of this study is to compare the characteristics planned through rural and urban areas-residing elderly people's participation in the shared housing spatial composition by area. This study conducted a small scale workshop panel method that targeted small group, but through which extensive information can be acquired, as a qualitative method. This study targeted 16 elderly people aged 65 and over living in rented apartments in rural and urban areas by dividing them two groups by area, namely into four groups. A total of 12 workshop sessions were held with three sessions at a time through a certain time interval. As a result of the study, the elderly people showed positive responses to the shared housing, irrelevant of area. As time went on, the workshop panel method's effect was revealed through consolidated positive attitude and agreement of different opinions. The shared housing for elderly people is valuable as a residential alternative for elderly people, and differentiated supply of the shared housing for elderly people, according to residential area's characteristics, is suggested.

• Journal of Preventive Medicine and Public Health
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• 제43권1호
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• pp.26-34
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• 2010

Objectives: The purpose of this research is to analyze the impact of shared-decision making on patient satisfaction. The study is significant since it focuses on developing appropriate methodologies and analyzing data to identify patient preferences, with the goals of optimizing treatment selection, and substantiating the relationship between such preferences and their impact on outcomes. Methods: A thorough literature review that developed the framework illustrating key dimensions of shared decision making was followed by a quantitative assessment and regression analysis of patient-perceived satisfaction, and the degree of shared-decision making. Results: A positive association was evident between shared-decision making and patient satisfaction. The impact of shared decision making on patient satisfaction was greater than other variable including gender, education, and number of visits. Conclusions: Patients who participate in care-related decisions and who are given an explanation of their health problems are more likely to be satisfied with their care. It would benefit health care organizations to train their medical professionals in this communication method, and to include it in their practice guidelines.

• 정보관리학회지
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• 제14권1호
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• pp.183-206
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• 1997

본 연구는 정보검색용 표준 프로토콜인 Z39.50을 공동편목에 응용하기 위하여 Z39.50의 발전과정과 제반기능에 대하여 살펴보고, Z39.50의 속성과 데이터베이스 갱신서비스를 토대로 Z39.50 공동편목 게이트웨이 모형을 설계하였다. 이 게이트웨이는 국내교육.연구도서관 서지협력망의 온라인 공동편목시스템을 대상으로 하였다. 본 연구에서 설계된 두가지 측면의 Z39.50공동편목 게이트웨이, 즉 중앙집중형 공동편목 게이트웨이와 분산형 공동편목 게이트웨이 모형은 기본적으로 웹서버에서 동작하며 이용자 접근이 쉬운 웹브라우저를 통하여 접근할 수 있도록 설계하였다.

• KIEAE Journal
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• 제7권4호
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• pp.63-74
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• 2007

While the importance of social integration has been mainly emphasized in the fields of social welfare services for the elderly, disabled and lower income citizens, many types of elderly housing had been developed in a way of segregating the elderly from society rather than integrating. Meanwhile, shared group house may allow older people to 'age in place' within the communities where they used to live by providing them with social, economic and practical benefits. The purpose of this study is to carry out empirical research on responses to elderly shared group house. Interview survey with questionnaire was conducted among 138 elderly people between 60-75 years old, living in Seoul and its metropolitan area. Responses of the elderly included awareness, perception and preference. It was revealed that the respondents had negative perceptions on existing shared group house in Korea. Most of the respondents showed preference to moving into socially-integrated type of shared group houses developed within their communities. This study indicated the potential of such type shared group house to become a favorable housing alternative for elderly people which supports their sustainable independent living within community.

• 가족자원경영과 정책
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• 제18권3호
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• pp.103-116
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• 2014

The purpose of this study is to examine the influence of family mealtime on the childrens' school adaptation. This study uses data from the 2012 Survey on Child Education and School Involvement of Parents by the Center for Family-School Partnership Policy Research at Seoul National University. Survey data was collected from 1500 parents with school-aged children. For the data analysis, Chi sqaure test and hierarchical linear regression analyses were conducted. The results of these analyses showed that the numbers of family meals shared averaged 4.26 times per week for breakfast and 4.33 times per week for dinner. There were significant differences in the number of family meals shared together according to school level, residence area, and parent employment status, and household income. In addition, childrens' school adaptation was significantly different depending on school level, parent gender, parent education, and parent employment status. Finally, according to the hierarchical regression analyses, the number of family meals shared significantly predicted childrens' school adaptation. The greater number of family meals shared, the stronger the childrens' school adaptation. These results indicate that family mealtime has a positive effect on childrens' school adaptation. This study suggests that family mealtime is an indicator of family strength and it needs to guarantee family shared time at least to have a dinner together. This study could provide grounds for making family policy and education policy in order to guarantee family shared time.