• KSII Transactions on Internet and Information Systems (TIIS)
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• 제9권3호
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• pp.921-940
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• 2015

In this paper, we investigate the multi-resource allocation problem, a unique feature of which is that the multiple resources can compensate each other while achieving the desired system performance. In particular, power and time allocations are jointly optimized with the target of energy efficiency under the resource-limited constraints. Different from previous studies on the power-time tradeoff, we consider a multi-server case where the concurrent serving users are quantitatively restricted. Therefore user selection is investigated accompanying the resource allocation, making the power-time tradeoff occur not only between the users in the same server but also in different servers. The complex multivariate optimization problem can be modeled as a variant of 2-Dimension Bin Packing Problem (V2D-BPP), which is a joint non-linear and integer programming problem. Though we use state decomposition model to transform it into a convex optimization problem, the variables are still coupled. Therefore, we propose an Iterative Dual Optimization (IDO) algorithm to obtain its optimal solution. Simulations show that the joint multi-resource allocation algorithm outperforms two existing non-joint algorithms from the perspective of energy efficiency.

• 지역사회간호학회지
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• 제21권2호
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• pp.263-272
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• 2010

Purpose: This study was to identify health needs of the elderly at nursing homes by long-term care grade. Methods: The health needs of 116 elders at two nursing homes in Seoul were measured with resident assessment protocols (RAPs), activities of daily living (ADL), and cognitive performance scale (CPS), and pain and depression were measured by resident assessment instrument (RAI). Results: With regard to RAPs, 11 out of 18 items had different distribution in the 3 groups significantly. The 1st-grade elders had a higher percentage of 9 items than the 2nd- and 3rd-grade ones but the 3rd-grade ones had the highest health needs related with activity. The 2nd-grade elders had similar health needs to the 1st-grade ones. In terms of functional level, the 1st-grade elders had the highest percentage of CPS and ADL but the 3rd-grade ones had the highest score of pain and depression out of the 3 groups. The standardized assessment instrument to identify specific health needs by the 3 groups should be developed. Therefore, care plans to meet health needs of the 3 groups will be made. Conclusion: It is suggested that nursing care is required to the elderly of the 1st- and 2nd-grade and safe activity and environment to the 3rd-graded ones.

• 한국HCI학회:학술대회논문집
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• 한국HCI학회 2009년도 학술대회
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• pp.1160-1165
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• 2009

사용자들에게 새로운 경험을 전달해주는 중요한 요소인 게임 인터페이스는 게임 플레이어에게 새로운 경험을 전달해주는 중요한 요소이며, 그 역할이 점점 커지고 있다. 최근에는 게임 플레이어의 움직임을 게임 컨트롤에 직접 반영하는 새로운 게임 인터페이스가 주목받고 있으며, 이렇게 직관성이 강화된 게임 인터페이스를 사용한 체감형 게임은 플레이어에게 컨트롤러를 조작하는 방식의 기존 게임보다 더 나은 몰입감을 제공하고 있다. 게임 플레이어들은 비슷한 형태로 반복되던 기존의 인터페이스에서 얻을 수 없는 새로운 경험을 원하고 있으며, 플레이어에게 다른 사용자 경험을 제공하기 위해서는 직관성이 강화된 새로운 게임 인터페이스와 더불어 그에 적합한 게임 컨텐츠가 필요하다. 본 논문에서는 뇌파를 이용한 Brain Computer Interface를 활용하여 직관적인 게임 인터페이스를 개발하고, 개발된 인터페이스를 통해 플레이어의 경험을 최대한 높일 수 있는 게임 환경 디자인을 제안해 보고자 한다.

• 한국생활과학회지
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• 제18권5호
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• pp.985-994
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• 2009

This research is exploratory in considering the unique socio-cultural context of South Korea, where the present government is responding to the demand for English language training. The study asked the question: What do mothers experience when sending their young children to a private English institute, so called English kindergarten, instead of a regular preschool? A qualitative approach was used to analyze the in-depth interviews with 19 mothers who sent their young child to an English kindergarten. Mothers stated that their young child needs to be a competent English speaker. The mothers expected that an English kindergarten would prepare their child better for the elementary school English curriculum than a regular preschool. The study revealed that English kindergartens symbolized the precedence and the privileges of the elite because of their high tuition fees, native-speaker teachers, and small class sizes. The mothers showed a sense of pride and vicarious satisfaction from sending their child to an English kindergarten. However, the mothers recognized that English kindergartens put more emphasis on cognitive learning instead of the social development of children. It was almost impossible for mothers to communicate with the native-speaker teachers about their child. The mothers seemed to overlook their child's struggle to adapt to an English Kindergarten. The findings of the study raise issues concerning the boom of teaching young children English in Korea.

• 유통과학연구
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• 제16권2호
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• pp.25-33
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• 2018

Purpose - This study focused on the effect of counter-factual thinking on post-purchase behavior producing consumer regret at HMR selection and purchase. We have analyzed the factors that HMR production and distribution businesses should consider because distribution and marketing strategy reflecting consumers' demand. Research design, data, and methodology - For the purpose of carrying out this research, we conducted a direst structured questionnaire to students at 'J' college. A total of 237 valid questionnaires were collected for students and their parents at 'J' university. For the hypothesis test, exploratory factor analysis, t-test, regression and structure equation path analysis were performed. Results - The consumers who often resented HMR purchase did counter-factual thinking on post-purchase behavior were likely to do switching purchases. Counter-factual thinking on post-purchase behavior had a negative influence upon consumer's satisfaction with HMR safety and marketing characteristics. Conclusions - Consumers who had been satisfied to a certain degree might have cognitive dissonance of minor mistakes of HMR product were likely to have downward counter-factual thinking through contrast effects. Therefore, HMR producer and distribution businesses that had production, distribution and marketing strategy to satisfy consumers by raw material, freshness and safety were likely to switch to another product at one time mistake of selection, purchase and use.

• 디지털융복합연구
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• 제15권5호
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• pp.345-351
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• 2017

국어를 공부하는 외국인 학생들이 몇 년간 급격하게 증가하면서 한국어의 국제적인 지위가 올라가고 있다. 하지만 외국인 학생들의 입장에서는 한국어를 배우는 과정에 많은 어려움을 겪는 점이 드러나고 있다. 또한 이에 더해 한국 학생들과 외국인 학생들간의 이해관계가 어려워지는 점을 지적하는 연구가 나오고 있다. 에린 샌더의 디자인 연구 스파이럴을 통해서 이 논문은 한국에 있는 외국인 학생들의 한국어 교육경험을 조사했다. 또한 이 학생들의 한국어 학습에 대한 인식과 효과적인 요인들을 분석하였다. 결론적으로 본 연구는 디자인 연구를 통해 한국어 학습에 중요한 통찰을 결과로 도출했으며, 외국인 학생들이 한국어를 효과적으로 공부하는데 기여할 디자인 기회를 도출한 의의가 있다.

• 패션비즈니스
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• 제5권3호
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• pp.111-128
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• 2001

The purpose of part I of this research was to study the definition of the wearable computer, the influential factors which led to its advent, the history of its progress and to prospect the figure of future research in fashion field of it. A qualitative analysis was applied to fulfill the research purpose, in which academic reports, professional journals, newspapers, magazines, books and sites were reviewed and analyzed in depth. The wearable computer which has been developed as a type of the portable hardware for computing during the first period, 1960s-1980s, has progressed into apparently softer and technologically advanced prototypes during the 2nd period, early-mid 1990s. From the beginning of the 3rd period since late 1990s, 'really wearable' prototypes were developed as the results of efforts to invent the more comfortable and interactive 'wearcomp' Based on the result of the analysis, the meaning of wearable computer in fashion field was interpreted in this study, as a reflection of converged demand and tendency of this era. New issues for future research of the wearable computer were suggested in the viewpoint of fashion design.

• 공학교육연구
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• 제23권3호
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• pp.13-19
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• 2020

The purpose of this study is to develop and apply a make-a-thon program based on engineering problem solving for science high school students and to analyze the changes of participating students. Through the consultation of teachers and experts, a team-based and student-driven engineering problem-solving-oriented make-a-thon program was developed. And, the program operated using KAIST's human and material resources for 51 students. Students composed of 12 teams studied 12 topics through an engineering problem-solving process, and the overall program satisfaction was very high, on average 4.62. Through this program, students' creative leader competency have been positively changed, especially in cognitive characteristics (diffusion thinking, problem solving ability) and social characteristics (pursuit of social values). Attitudes toward engineering also changed positively, especially in terms of difficulty of engineering, interest in engineering, gender role in engineering, and engineering and occupational factors. In conclusion, it was confirmed that this program is very effective for science high school students with high demand for engineering education.

• 대한안전경영과학회지
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• 제11권1호
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• pp.7-14
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• 2009

Protecting an infant from a risk of accident was an absolute responsibility and duty of parents in the past. As increase in the ratio of entering kindergartens, the demand of all day program also increases. In infancy, safety concerns are higher than other periods since infants are curious about objects and environments and that have stronger impulse of the spirit of inquiry. Since baby's functioning is poor, an ability of balance maintenance and an exercise function are not sufficiently developed. Further more, they lack a cognitive power about self-control or situation. According to Korea Consumer Agency, safety accidents in infant institution have increased in 115% as 294 cases compared with 137 cases in 2004. Major causes of infant deaths are street accidents, drowning, and deaths from a fall in order. Considering this situation, we need to prevent and deal with accidents. Therefore this thesis grasp the situation and analyze an actual condition of an safety education about teachers who work in such institutions and infants who are educated in institutions to prevent from accidents and make up pleasant environments. Then, it will suggest all efficient safety education plans for infants to them.

• 대한안전경영과학회지
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• 제16권2호
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• pp.19-29
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• 2014

Korean societal concern for the train accidents is fast and widely increasing with an ever-increasing demand and use for KTX. Most of these train accidents are inclined to be caused by human error. Experts used to attribute the causes of human error to the defects in various aspects such as technology, organizational system, practices, corporate culture, and/or human resource itself. Among the diverse causes of human error, an important one, even though it was rarely focused, may be the issue of impact of rule or procedure change on human error. Giving attention to the implicit importance of this issue, this study intends to highlight the theme of frequent procedure change in railway driving manual as a critical factor of human error. To attain this purpose mentioned above, dual methodologies were adopted. One is to qualitatively analyze the real cases of procedure change in relevant manuals followed by the incident case(passing the station scheduled to stop) happened lately. Another is to quantitatively perform statistical analysis based on questionnaires received from 224 train drivers. Results show that frequent changes in internal affairs procedure is or may be an important factor causing stress and human error from train drivers.