• Asian Pacific Journal of Cancer Prevention
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• 제16권14호
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• pp.5595-5597
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• 2015

Electrical impedance tomography (EIT) is a new non-invasive, mobile screening method which does not use ionizing radiation to the human breast. It is based on the theory that cancer cells display altered local dielectric properties, thus demonstrating measurably higher conductivity values. This article reviews the utilisation of EIT in breast cancer detection. It could be used as an adjunct to mammography and ultrasonography for breast cancer screening.

• 한국정보과학회논문지:시스템및이론
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• 제36권6호
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• pp.488-501
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• 2009

유비쿼터스 환경에서 모바일 단말기의 제한적인 자원 문제를 해결하기 위해 주변 자원을 실시간으로 공유하는 연구들이 진행되고 있다. 그리고 자원의 공유뿐만 아니라 상황 정보에 기반한 추론을 통해 개인 맞춤형 자원을 추천하는 연구도 활발히 진행되고 있다. 개인 맞춤형 자원 추천을 위하여 사용자의 기본 정보, 자원에 대한 선호도, 공유 대상이 되는 자원의 정보, 단말기의 위치, 시간과 같은 다양한 상황 정보는 효과적으로 공유 및 관리되어야 한다. 또한 신뢰성 있는 자원 추론을 위해 필요한 추론규칙을 검증하는 단계는 매우 중요하다. 이를 위해서 다양한 상황 정보를 구성하여 실제 단말기 상에서 자원 추론규칙이 올바르게 동작하는지 검증해야 하지만 이는 현실적으로 많은 비용과 시간이 필요하다. 따라서 본 논문애서는 이러한 문제점을 해결하기 위하석 추론 검증 도구를 제안한다. 제안하는 추론 검증도구는 편리한 그래픽 사용자 인터페이스를 제공하여 원하는 상황 정보를 쉽게 생성할 수 있고, 실제 단말기를 대신하여 동적인 상황 정보의 변경에 따른 추론을 정확하게 검증한다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제9권10호
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• pp.4177-4190
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• 2015

Current research on Internet of Things (IoT) has primarily addressed the means to enhancing smart resource allocation, automatic network operation, and secure service provisioning. In particular, providing satisfactory security service in IoT systems is indispensable to its mission critical applications. However, limited resources prevent full security coverage at all times. Therefore, these limited resources must be deployed intelligently by considering differences in priorities of targets that require security coverage. In this study, we have developed a new application of Cognitive Radio (CR) technology for IoT systems and provide an appropriate security solution that will enable IoT to be more affordable and applicable than it is currently. To resolve the security-related resource allocation problem, game theory is a suitable and effective tool. Based on the Blotto game model, we propose a new strategic power allocation scheme to ensure secure CR communications. A simulation shows that our proposed scheme can effectively respond to current system conditions and perform more effectively than other existing schemes in dynamically changeable IoT environments.

• 가족자원경영과 정책
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• 제12권2호
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• pp.31-55
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• 2008

Human capital theory and social capital theory provide a framework for analyzing economic well-being. The purpose of this study was to investigate the effects of human capital and social capital on the economic well-being of the elderly. The data from the 1st wave of KLoSA (Korean Longitudinal Study of Aging) were used (n=3,426). The major findings were as follows: First, human capital and social capital are both resources that can contribute to increasing the economic well-being of the elderly. Second, the effects of human capital on the economic well-being of the elderly were relatively higher than the effects of social capital. Third, the relative contributions of human capital and social capital to increasing economic well-being varied by sex, age, and region. Based on the empirical results, the implications for social investment in human capital and social capital were provided.

• 산업공학
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• 제16권spc호
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• pp.93-98
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• 2003

This paper addresses an AGV dispatching problem in semiconductor clean-room bays where AGVs move cassettes of wafers between machines or machines and a central buffer. Since each machine in a bay has a local buffer of limited capacity, material flow should be controlled in a careful way to maintain high system performance. It is regarded that two most important performance measures in a semiconductor bay are throughput rate and lead-time. The throughput rate is determined by a bottleneck resource and the lead-time depends on smooth material flow in the system. This paper presents an AGV dispatching procedure based on the concept of theory of constraints (TOC), by which dispatching decisions are made to utilize the bottleneck resource at the maximum level and to smooth the flow of material. The new dispatching procedure is compared with existing dispatching rules through simulation experiments.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2007년도 하계종합학술대회 논문집
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• pp.195-196
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• 2007

The purpose of this paper is to analyze the resource allocation problem in a self organizing network from the viewpoint of game theory. The main focus is to suggest the model and analyze a power control algorithm in wireless ad-hoc networks using non cooperative games. Our approach is based on a model for the level of satisfaction and utility a wireless user in a self organizing network derives from using the system. Using this model, we show a distributed power control scheme that maximizes utility of each user in the network. Formulating this as a non-cooperative game we will show the feasibility of such power control as well as existence of the Nash Equilibrium achieved by the non-cooperative game.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제9권10호
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• pp.3771-3788
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• 2015

This paper studies the distributed energy efficient resource management in the Internet of Things (IoT). Wireless communication networks support the IoT without limitation of distance and location, which significantly impels its development. We study the communication channel and energy management in the wireless communication network supported IoT to improve the ability of connection, communication, share and collaboration, by using the game theory and distributed learning algorithm. First, we formulate an energy efficient neighbor collaborative game model and prove that the proposed game is an exact potential game. Second, we design a distributed energy efficient channel selection learning algorithm to obtain the global optimum in a distributed manner. We prove that the proposed algorithm will asymptotically converge to the global optimum with geometric speed. Finally, we make the simulations to verify the theoretic analysis and the performance of proposed algorithm.

• 산경연구논집
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• 제9권9호
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• pp.35-44
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• 2018

Purpose - In endless competition, companies pursue cost reduction and work efficiency. So, entrepreneurs try to increase job intensity, which may lead to job stress and high turnovers because of job burnout. But, Information systems are acknowledged as a work support tool that secures work convenience and the productivity of employees. In this study, we aimed to confirm the effects of information systems in reduing the work overload of employees in a human resource intensive industry. Research design, data and methodology - This is based on the job demands-resources model, conducting an empirical analysis of surveys given to hospital employees working in a human resource intensive industry. Results - The research revealed that information systems reduced the work overload of employees in a human resource intensive industry. Conclusion - This study confirmed the effects of information systems as a job resource based on JD-R theory, and presentation of empirical results indicated that information systems alleviate employee job overload and increases job satisfaction in the medical services industry. In the medical services industry, using electronic health record system decreases in work overload, which results in employees gaining time for self-development and time management, reducing job stress, and leading to job satisfaction.

• The Journal of Asian Finance, Economics and Business
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• 제5권4호
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• pp.135-147
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• 2018

There has been a recent increase in the interest towards founding companies and in line with the South Korean Government's policy on start-up support, discussions are rife about the effect of entrepreneurship on the management and performances of these companies. To enhance the competitiveness of SMEs, it is expedient to acquire and deploy consistent entrepreneurship, differentiate corporate resources, ensure the appropriate utilization of resources and the integration of such factors in response to the changing environment. This research examines relationships among entrepreneurship, three components of corporate capabilities, dynamic capability and technical performance based on resource-based view and the dynamic capability theory. The authors also investigate the moderating role of corporate life cycle. To test the hypothesis, we conducted a survey on 352 technologies -innovative SMEs located in South Korea via professional research institutes. The findings confirm the hypothesis that SMEs' entrepreneurship has a positive effect on three kinds of corporate capabilities (e.g., marketing, R&D, operations capability), and it had a positive effect on dynamic capability, whiles dynamic capability also had an influence on technical performances. The findings also confirmed the hypothesis that corporate life cycle moderates the relationship between dynamic capability and technical performances respectively. The research implications for both practitioners and academicians are discussed.

• 한국사회복지학
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• 제58권4호
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• pp.65-92
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• 2006

본 연구는 사회복지조직 상호간 협력을 도모하면서 자원개발의 지속성을 시도하고 있는 실천경험에 관한 질적연구를 진행한다. 연구목적은 지역사회 관계망을 활용한 자원개발 현상에 관한 포괄적 이해의 기술 그리고 경험의 유형을 발견하는데 있다. 특히, 자원개발 경험에 관한 이해의 도구로 네트워크 관점이 아닌 사회자본 관점을 적용하고자 한다. 연구방법으로는 스트라우스와 코빈(Strauss and Corbin, 1998), 코빈(Corbin, 2004)의 근거이론(Grounded Theory) 방법을 사용하고 연구참여자는 눈덩이표집을 통해 사회복지관(서울시소재)에 종사하는 중간관리자와 최고관리자 중에서 지역사회 관계망을 활용한 자원개발 경험이 3년 이상인 14명으로 하였다. 본 연구결과 지역사회 관계망을 활용한 자원개발 경험은 지역사회 특성에 따라 달랐으며 다음의 네 가지로 유형화되었다. '상부상조의 재생형', '시민역량의 자원화형', '주민조직을 통한 자원동원형', '외부자원망의 활용형' 등이다. 이러한 연구결과는 지역사회특성에 따른 관계망기반의 자원개발에 관한 논의를 확장하는데 기여한 의의를 지닌다.