• KSII Transactions on Internet and Information Systems (TIIS)
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• v.6 no.4
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• pp.1090-1105
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• 2012

A multi-modal sensing M2M healthcare monitoring system for the continuous monitoring of patients under their natural physiological states or elderly persons with chronic diseases is summarized. The system is designed for homecare or the monitoring of the elderly who live in country side or small rest home without enough support from caregivers or doctors, instead of patient monitoring in big hospital environment. Further insights into the natural cause and progression of diseases are afforded by context-aware sensing, which includes the use of accelerometers to monitor patient activities, or by location-aware indoor tracking based on ultrasonic and RF sensing. Moreover, indoor location tracking provides information about the location of patients in their physical environment and helps the caregiver in the provision of appropriate support.

• Proceedings of the Korean Society of Computer Information Conference
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• 2014.07a
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• pp.375-378
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• 2014

예전 기업 그룹웨어 환경은 기업 소유의 기기을 활용하는 사내에 출근한 직원들 대상으로만 서비스 하였다. 그러나, 스마트폰 보급이 확대되면서 사외에서 기업내부로 접근하여 그룹웨어 등을 활용할 수 있는 스마트워크 서비스가 발전하였다. 또한 사내로 반입된 개인 소유 단말 기기가 그룹웨어 서비스를 접속할 수 있는 BYOD 도입 기업들이 증가하고 있다. BYOD, 스마트워크 환경에서 기기 접속 위치, 시간 등 다양한 접속 상황을 활용한 보안정책 관리 구조를 연구하였다. 본 논문에서는 서비스 접속 이후 보안에 취약한 서비스 접근 상황정보 중심 보안정책의 한계를 개선하기 위하여 서비스 웹/DB 서비스 이용 상황정보 기반 보안정책 구조를 제안한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2009.04a
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• pp.1527-1530
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• 2009

유비쿼터스 환경의 확산에 따른 다양한 보안문제의 발생은 센서의 정보를 이용한 상황인식 보안 서비스의 필요성을 증대시키고 있다. 본 논문에서는 FCM (Fuzzy C-Means) 클러스터링과 다변량 퍼지 결정트리 (Multivariate Fuzzy Decision Tree)를 이용하여 센서의 정보를 분류함으로써 사용자의 상황을 인식하고, 사용자가 처한 상황에 따라 다양한 수준의 보안기술을 유연하게 적용할 수 있는 상황인식 보안 서비스를 제안한다. 제안 모델은 기존에 많이 연구되어 오던 고정된 규칙을 기반으로 하는 RBAC(Role-Based Access Control)계열의 모델보다 더욱 유연하고 적합한 결과를 보여주고 있다.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.04a
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• pp.960-963
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• 2011

본 논문에서는 유비쿼터스 환경에서의 원격 의료 서비스를 위한 상황 및 프라이버시를 고려한 역할기반 접근제어 모델에서의 위임 모델을 제안한다. 제안 모델은 원격 의료 서비스에서 반드시 필요하고 빈번히 발생할 수 있는 사용자 대 사용자 위임, 역할 대 역할 위임, 다단계 위임, 다중 위임 등의 기능을 제공한다. 따라서 본 논문에서 제안하는 모델을 이용하여 원격의료 서비스를 위한 사용자의 프라이버시 보호와 세밀한 접근제어가 가능하다.

• Journal of Korean Library and Information Science Society
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• v.45 no.3
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• pp.321-348
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• 2014

The purpose of this study is to examine in depth the personal experience of Pre-Service Librarian Teacher during Student Teaching Practice. This helps us understand the overall process and diverse environment of Student Teaching Practice. We conducted in depth interview with participants who had recently experienced. and data analysis was undertaken using the phenomenological method devised by Giorgi. The significance of Pre-service Teacher Librarian experiences during Student Teaching Practice can be summarized in five categories as follows: 'the formation of Pre-service Librarian teacher's awareness about library and librarian through growth process', 'concretization and Strategy Implementation about Career Planning', 'Self-growth Need through experience of student teaching practice', 'Understanding of Organizational Culture Perception of Communication', 'Face reality about library and librarian'. These constituents can be understood in the context of time sequence. The result of this study may contribute for improving the overall environment at Student Teaching Practice.

• International Commerce and Information Review
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• v.14 no.2
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• pp.497-521
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• 2012

This paper is to conduct comparative analysis of the impact of overall logistics service quality and its different influence across countries in internet shopping mall context. After reviewing the different approaches given by the literature, SEM analysis was used to testify the hypotheses. A questionnaire based on personal survey was conducted from internet shopping mall users in Korea, China, Japan. This paper collected data from 786 respondents in the countries. Structural equation modeling was also applied to these data to test relationships among the variables in the study. The empirical results of this study are summarized as follows. First, overall logistics service quality of internet shopping mall has a positive direct effect on the consumer assurance as well as consumer satisfaction. Second, consumer assurance and consumer satisfaction have mediated effects between overall logistics service quality and post-purchasing behaviors intention. Third, its effect size of the '$GLSQ{\rightarrow}$ consumer assurance' and the '$GLSQ{\rightarrow}$ consumer satisfaction' links are the same in each country. However, that of the consumer assurance and the consumer satisfaction for the organizational performance are different for each country.

• Journal of the Korea Society of Computer and Information
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• v.16 no.6
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• pp.165-178
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• 2011

A gigantic ship is constructed by assembling various types of ship blocks, each block being made by cutting and piecing the steel-plates together. The steel-plate piling process as the initial stage of ship construction sorts and manages the steel-plates according to the ship blocks that the steel-plates are used to make. The steel-plate piling process poses some problems such as process delay due to piling errors, safety vulnerability due to the handling of extra heavy-weight objects, and the uncertainty of work plan due to lack of information management in the pile spaces. We constructed a steel-plate piling process system based on the context-aware computing to resolve such problems. We built simulation system that can simulate the piling process and then established a smart space within the system by using tags, sensors and a real-time location system in order to collect context information. Workers receive an appropriate or intelligent service from the system.

• The Journal of the Korea Contents Association
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• v.11 no.8
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• pp.14-22
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• 2011

It is important for the strategy of service to provide the health information in the environment that the healthcare has been changed focusing on the preventive medicine. Recently, the various applications of u-healthcare have been presented by researchers. In this paper, we proposed the health information monitoring system using the context sensors based band. By wearing the proposed hand, the health status is gathered and vital signals are transmitted to the connected UMPC. It can be easily monitored according to the user locations in real time. To provide the health index according to the temperature, the air conditioning, the illumination, the humidity, and the ultraviolet rays, we use the various XML links extracted from RSS of the Korea Meteorological Administration. The health information is analyzed in terms of factors, such as, the asthma index, the stroke index, the skin disease index, the pulmonary disease index, the pollen concentration index, and the city high temperature index. Ultimately, this paper suggests empirical application to verify the adequacy and the validity with the proposed system. Accordingly, the satisfaction and the quality of services will be improved the healthcare.

• Korean Journal of Social Welfare
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• v.50
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• pp.265-288
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• 2002

The use of alcohol is recognized as having negative consequences on clinical and psychosocial outcomes in service users with major mental illnesses. This necessitates an introduction of intervention measures in domestic mental health service in Korea. Since research basis on which such measures are developed lacks, this paper aims at exploring drinking patterns of Korean service users and suggesting directions and strategies for intervention. The data came from 151 service users recruited at 14 service settings in Seoul Metropolitan area. The quantitative part of the data includes their recent drinking experiences in terms of patterns and severity; the qualitative part includes information on the drinking context. The data were compared among three types of service settings, each of which differs in physical availability of alcohol by their users. Each group revealed distinctive features in drinking patterns, the author thus suggested directions and strategies of intervention specific to type of service setting.

• Journal of Information Technology and Architecture
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• v.9 no.1
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• pp.57-66
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• 2012

Recently, with a rapidly growing of the mobile content market, a variety of mobile-based applications are being launched. But mobile devices, compared to the average computer, take a lot of effort and time to get the final contents you want to use due to the restrictions such as screen size and input methods. To solve this inconvenience, a recommender system is required, which provides customized information that users prefer by filtering and forecasting the information.In this study, an tailored multi-information recommendation system utilizing a Personalized information recommendation system on smartphone is proposed. Filtering of information is to predict and recommend the information the individual would prefer to by using the user-based collaborative filtering. At this time, the degree of similarity used for the user-based collaborative filtering process is Euclidean distance method using the Pearson's correlation coefficient as weight value.As a real applying case to evaluate the performance of the recommender system, the scenarios showing the usefulness of recommendation service for the actual restaurant is shown. Through the comparison experiment the augmented reality based multi-recommendation services to the existing single recommendation service, the usefulness of the recommendation services in this study is verified.