• 한국멀티미디어학회논문지
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• 제25권8호
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• pp.1109-1121
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• 2022

As the demand for quality sleep increases in modern society, the importance of sleep technology has increased. Recently, development of sleep environment improvement products and research on the user's sleep improvement have been activated. Representatively, user sleep pattern analysis research is being conducted through the existing polysomnography, but it is difficult to use it in the sleep environment of daily life. Therefore, in this paper, we propose a system design that can provide a customized deep sleep service to users by detecting sleep disturbance factors in a motion bed environment. In order to improve the user's sleep satisfaction, a logistic regression-based sleep pattern analysis model is proposed and accuracy and significance are verified through experiments. And to improve user's sleep satisfaction, we propose a logistic regression-based sleep pattern analysis model and verify accuracy and significance through experiments. The proposed system is expected to improve the user's sleep quality and effectively prevent and manage sleep disorders.

• 대한교통학회지
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• 제24권7호
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• pp.53-62
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• 2006

본 연구는 대구시 대중교통체계 개편 후 이용자 의식조사를 토대로 대중교통체계 개편 전후의 이용자 통행패턴의 변화 및 환승통행, 서비스 만족도에 대한 분석을 실시하였다. 그 결과 대중교통체계 개편으로 환승통행 수요가 증가하였으며, 특히 버스를 이용한 통행패턴에서 버스와 지하철간의 환승을 통한 통행패턴으로의 변화가 높은 것으로 나타났다. 이는 환승요금 무료할인제 실시로 환승에 대한 경제적 부담감의 감소와 버스노선체계 개편으로 대중교통이용자의 통행패턴이 다양화되었기 때문이다 환승에 대해서는 전반적으로 개선된 것으로 나타났지만, 무환승 희망비율이 높게 나타난 환승에 대해서는 여전히 많은 부담을 느끼는 것으로 나타났다

• 한국통신학회논문지
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• 제30권1A호
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• pp.46-54
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• 2005

본 논문은 사용자의 이동 패턴에 기반한 효율적인 이동 멀티캐스트 기법을 제안한다. 본 논문은 멀티캐스트 서비스를 받기 위해 소요되는 전체 지연 시간을 줄이기 위한 방법으로 이동 노드의 반복적인 이동 성향을 정의한다. 정의된 이동 성향을 바탕으로 지역의 범위에 속하는 외부 에이전트들은 멀티캐스트 라우팅 트리를 활성화된 상태로 유지함으로 이동 노드가 재방문 했을 경우 지연 없이 멀티캐스트 서비스를 즉시 받을 수 있다. 수학적 분석모델을 이용하여 제안된 방안의 성능을 증명하며, 분석 결과는 제안된 방식이 기존의 연동방식 보다 전체 처리 비용과 서비스 지연 시간 측면에서 우수하다는 것을 보여준다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1998년도 추계학술대회 논문집
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• pp.17-20
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• 1998

Thermal behavior of Flow Pattern Defect (FPD) and Large Pit (LP) in Czochralski Silicon crystals was investigated by applying high temperature ($\geq$1100$^{\circ}C$) annealing and non-agitation Secco etching. For evaluation of the effect of LP upon device performance / yield, DRAM and ASIC devices were fabricated. The results indicate that high temperature annealing generates LPs whereas it decreases FPD density drastically, and LP does not have detrimental effects on the performance /

• 디지털콘텐츠학회 논문지
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• 제15권6호
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• pp.711-719
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• 2014

유비쿼터스 컴퓨팅 환경하에서 전자상거래 대규모가 대형화되고 취급되는 항목제품들도 다종 다양해지고 있는 것이 현실이다. 이러한 유비쿼터스 상거래 시스템은 편리하고 신속하게 제공되어야 하고 다이나믹한 환경에서 실시간성과 민첩성이 요구되고 있다. 데이터마이닝에서 추출한 지식을 적극적으로 활용하는 기법들이 전자상거래에서 구매 촉진을 증진시키는 마케팅 전략으로 활용되고 있다. 본 연구에서는 유비쿼터스 컴퓨팅 환경 하에 지능형 모바일 단말기를 이용한 추천을 위한 가중치기반 순차패턴 탐사를 이용한 추천서비스f를 제안하였다. 본 연구에서는 추천의 정확성을 향상시키고 구매력이 높은 항목제품 및 서비스를 추천하기 위해서 FRAT 세분화 기법을 이용한 가중치기반 순차패턴 탐사를 이용한 추천서비스를 제안하였다. 성능평가를 위해 현업에서 사용하는 인터넷 화장품 쇼핑몰의 데이터를 기반으로 데이터 셋을 구성하여 기존의 방법과 비교 실험을 통해 성능을 평가하여 효용성과 타당성을 입증하였다. 유비쿼터스 상거래에서 시간과 장소에 제약을 받지 않는 모바일 웹앱을 이용한 추천서비스를 위해서 이전방법보다 개선된 방법으로 추천서비스를 구현하였다.

• 디지털산업정보학회논문지
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• 제9권4호
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• pp.251-265
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• 2013

The emergence of social network services, is changing the foundation of human relationship formation and method of communication of individuals through sharing of free information. Social network service is a service to support or facilitate an on-line extension of off-line network among people by helping them to share personal profile. History of social network services very short. But users of the various layers is increasing rapidly and ripple effect social as a result is very large. The focus of existing research was mainly devoted to motivation of use and acceptance of social network services. Currently the use of SNS was maturing. Thus, in-depth research on the use pattern of SNS users is needed. The purpose of this study is that, for Facebook in social network services, to analyze the changes in the initial stage of use, medium-term, usage patterns at the current time. Results of the study by analyzing the characteristics of the change in the pattern of usage of user of Facebook, it can be used as basic materials for SNS researchers and service provider.

• 한국농촌건축학회논문집
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• 제11권1호
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• pp.75-82
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• 2009

The goal of this study is to find a design pattern of platform of chapel according to acceptance of community's social activities and classify a forms of platform design between urban and rural community church. It was surveyed by 18 community churches including of 8 rural churches. And it was comprised in main contents that this study surveyed about social functions of church and composition of room, a transformation of worship and platform, and furniture of platform. As a results of this study, I could suggest a conclusions as follows; firstly, community churches are trying hard to make their social functions wide and deep. Secondly it was necessary for them to prepare a spaces and rooms for service of community people like a social welfare and christian cultural activities. Thirdly, the form of platform and style of worship were serviced by transformation for the acceptance of community requirements. Finally, the service style of chapel and platform have been transformed in a view point of accommodation of community since early 2000.

• 한국산학기술학회논문지
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• 제9권5호
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• pp.1304-1310
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• 2008

본 연구의 목적은 거주자의 명령 없이도 스스로 거주자의 행위를 배워서 다가올 상황을 예측하고 이에 맞춰진 개인화 된 서비스를 제공할 수 있는 지능형 유비쿼터스 주택의 시스템구조를 제안하는 것이다. 이러한 시스템 구조가 갖춰야 할 전제조건으로 거주자의 행위패턴, 공간이동패턴, 서비스패턴을 조합한 맞춤형 서비스개념 도입이 필수적임을 도출했고, 이를 구현할 수 있는 4가지 구성요소로 Agent, Database, Working Memory, Log Data가 필요함을 확인하였다. 특히 이들 4가지 구성요소를 갖는 지능형 유비쿼터스 주택의 시스템 구조는 처음에는 거주자 행위의 사례나 패턴이 저장되어 있지 않지만 시간이 지남에 따라 각 거주자에 대한 정보가 누적되고 거주자의 라이프스타일을 인식하게 되면서 거주자별 맞춤형 서비스를 제공할 수 있는 기반이 될 것이다.

• 기술혁신연구
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• 제8권1호
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• pp.73-94
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• 2000

The main objective of this research is to examine the spillover effects of technological knowledge from IT industry to other industrial sectors and, based on empirical findings, to draw policy implications and suggest policy directions. To this end, we divide IT industry into IT equipment and IT service, assuming that these two sub-sectors are considerably different each other in terms of technology knowledge flow. Other industries are classified into 17 different sectors based on the KSIC of 1990. As the proxy measure of technological knowledge, the notion of R&D stock is employed. The Input/output(I/O) Table is used to define the inter-industrial flow pattern and to draw the knowledge flow matrix. As the research methodology, cost function model is employed to gauge the spillover effects of technological knowledge of IT industry. Based on the results of analysis, it is found that the economic impact of technology diffusion also exhibits a different pattern between IT equipment and IT service. The diffusion of IT equipment tends to show labor-substitution effect whereas IT service displays labor-creation effect. This fact should be considered in devising industry, education, and labor policy. The expectations from this research are as follows. First, the sectoral pattern, difference between IT equipment and service in particular, identified from this research may shed light on the sector-specific policy direction. It is emphasized that a sector-specific approach, rather than an aggregate approach, is relevant for formulating IT policy. Second, it is expected that the importance of technology diffusion programs and policy measures are recognized among policy makers in IT industry.

• 품질경영학회지
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• 제33권4호
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• pp.21-41
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• 2005

This study analyzes the Internet utilization pattern of customer by comprehensively investigating the previous studies on the behavior pattern of customer in terms of Internet business. Based on the analysis, this study develops research framework that supports strategic decision-making for resource allocation in Internet business. Such research framework would be helpful for providing the typology of Internet business model that can be specialized by each industry. As a result of the simulation analysis, it was found that the optimal resource allocation portfolio providing maximum profits to the Internet bookstore involves large-scale investment on delivery service and customer support service which are the key factors for post-purchase customer satisfaction, regardless of the growth pattern or size of Internet bookstore market. Consequently, from the above analysis, the investment ratio of resources for the profit maximization of Internet bookstore was drawn. Conclusively, based on the comprehensive examination of the results, this study provided a framework for dynamic resource allocation decision-making, and proposed a management strategy which allows consumers to shop under more favorable environment, and simultaneously enables the Internet bookstore to accomplish management objectives such as continuous growth and profit maximization.