• 한국멀티미디어학회논문지
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• 제7권7호
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• pp.922-933
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• 2004

최근 분산 시스템이나 협업 시스템을 위한 피어 투 피어(Peer-to-Peer) 네트워크에 대한 연구가 진행되고 있으며 암호학 분야에서는 pairing을 이용한 ID 기반의 공개키 암호 기법에 대한 연구가 활발히 이루어지고 있다. 본 논문에서는 동적 피어 그룹(Dynamic Peer Group, DPG) 멤버간의 안전한 그룹통신을 위한 ID 기반의 그룹키 관리 기법을 제안한다. 각 멤버들은 Private Key Generator(PKG)로부터 자신의 ID에 대한 공개키/개인키쌍을 발급 받으나, 그룹키를 관리하기 위한 중앙 관리개체를 이용하지 않고 멤버들간의 협력(collaboration)을 통해 자발적으로 그룹키를 관리함으로써 중앙 관리개체의 오류에 대한 문제(single-point of failure)를 예방할 수 있다. 그리고 동적 피어 그룹의 성질을 고려하여 멤버의 참여와 탈퇴에 대한 그룹키의 비밀성을 제공한다.

• 한국항해항만학회지
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• 제38권3호
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• pp.193-202
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• 2014

The comprehensive review of the STCW 1978, as amended in 1995 and associated Code was carried out from 2006 to 2010. These amendments will have a certain degree of impact on Maritime Education and Training(MET) institutes in terms of education and training of seafarer worldwide. Particularly, the Far East region countries are effected more than other regions since they covered about 30% of officers and 37% ratings in the world. In view of these facts this dissertation conceived to analyze the problems in the Far East main seafarer supply countries faced the implementation of "STCW Manila Amendments" To analyze these problems, this dissertation carried out questionnaire research to 7 targeted main MET of major Far East seafarer supply countries. After research this dissertation suggests the possible solutions such as, Joint On-Board Training Center; Joint Asia Maritime E-learning Systems; methods to reducing work-load, ship inspection burden and determine mandatory minimum safety manning standards in a safe way; technical cooperation fund to installation of training equipment; and clarify vague terminology of STCW Manila Amendments, to solve problems identified through the questionnaires.

• 한국산학기술학회논문지
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• 제15권3호
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• pp.1489-1495
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• 2014

고령화시대를 맞아서 한국은 2008년부터 노인장기요양보험을 실시하면서 노인부양부담을 가족으로부터 국가의 책임으로 인식하기 시작하였다. 데이케어센터(주간보호센터)는 사회적 보살핌을 제공하는 시설 중의 하나로 입소생활시설과는 다른 주간이용시설인데 설립초기 자원부족 및 서비스 질 향상 등의 문제가 지적되어 왔다. 본 논문에서는 데이케어센터를 지역을 중심으로 접근하면서 그 발전방향을 논의하였다. 또한 전문가심층면접분석을 통해서 데이케어센터의 차후 비전을 제시하였다. 심층분석 결과로는 데이케어센터에서 제공하는 건강케어 프로그램은 지역사회의 문제 및 특성을 반영하여야 하고, 사용자 중심이어야 하며 지역통합적 방식을 취해야 함이 제시되었다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2006년도 춘계학술논문 발표대회 제6권1호
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• pp.119-124
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• 2006

Design-Build, one contractor is responsible for both the design and construction, has become more popular since the government framed the policy on how to activate the design-build projects in 1996. The reality is, however, there are many problems encounted on Contractor Selection Method for Public Design-Build Projects. The purpose of this paper is to improve the problems, no way to meet the goal(value) the owners expect from the design-build projects, for instance, not fully reflecting the characteristics of projects and owners intention, not systematical enough to judge if bidders could carry out the contract. This study will insist we introduce Best Value Procurement, which is being commonly used in some advanced countries recently, so that we would properly select the contractor suitable for Best Value concept which totally depends on the owners, types of work and specified conditions. Furthermore, by passing through the Two-Step Procedures following Pre-qualification in Best Value Procurement, we expect it lighten the bidders' burden for proposal and the owners' complicate bid administration.

• Perspectives in Nursing Science
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• 제6권1호
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• pp.77-83
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• 2009

The number of nurses per bed at acute-stage hospitals is quite low in Korea compared with other OECD countries. In order to prevent the degradation of the quality of inpatient nursing services due to insufficient nurse staffs, the national health insurance introduced the differentiated nursing care fee system. This did not work as a motive for inducing the employment of nursing staff due to insufficient cost compensation. Because of insufficient nursing staff, family members have to stay with the patient or patients have to hire a personal care attendant. This increases the burden and cost to families. For the activation of hospitals without guardians, there should be policies for raising additional nursing staff such as standardizing jobs among nursing staff, particularly between nurses and nursing assistants, setting adequate standards of staffing in nursing according to medical service, substantiating the cost of nursing under the differentiated nursing care fee system, improving the medical fee system of hospitals without guardians including health insurance payment, supplying nursing staff stably through improving their working conditions such as providing child rearing services and salary increase, clarifying the qualification of personal care attendants working at acute.stage hospitals, developing indexes for assessing the quality of nursing care services, and monitoring for the management of uniform quality.

• 정보교육학회논문지
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• 제16권1호
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• pp.21-31
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• 2012

최근 프로그래밍 학습 과정에서 학습자가 느끼는 인지적인 부담을 감소시키기 위한 방법으로 성찰에 대한 연구가 이루어지고 있다. 이에 본 연구에서는 프로그래밍 학습에서 활동지를 사용한 성찰 활동을 통해 학습자의 프로젝트 수행이 어떻게 달라지는지를 알아보기 위하여 초등학생을 대상으로 수업을 진행하였다. 연구 결과, 프로그래밍 학습에서 성찰의 시간이 많은 학습자는 다양하고 창의적으로 프로젝트를 수행하는 모습을 확인할 수 있었다. 본 연구는 초등학생의 프로그래밍 학습에서 시행착오를 통해 구현하기보다 스스로 생각하는 성찰을 통해 프로그래밍 학습을 할 수 있는 기회를 제공해주었다 데에 의의가 있다.

• 경영과정보연구
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• 제25권
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• pp.223-242
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• 2008

Today, businesses are under rapidly changing environments that are characterized as stopless competition and uncertainty. Under this circumstance, workers are exposed to much stress that is induced by factors such as lots of job burden, responsibility, role conflicts, role ambiguity, interpersonal conflicts, pressure related to job performance and lots of job-related requests. Unlike workers of other industries, those of distribution business may be more exposed to stress because they serve in unique work conditions. Therefore, distribution workers have an accumulate fatigue of their own, suffering from health problems that are stress-induced. Distribution businesses should positively try to identify factors that fall their workers into stress, making those workers less stressful and preventing their negative job performance. Efforts to reduce workers' stress can not only improve their physical and mental health, but also raise business competitiveness. Thus the purpose of this study is to investigate how much distribution workers' job role, interpersonal relations and job environment are influential to their job stress and thereon determine relations between job stress and job performance.

• 대한안전경영과학회지
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• 제4권4호
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• pp.1-14
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• 2002

As domestic buildings have been large-scaled, diversified and high-rise, there have been a consistent demand for design, development of construction technology and accident prevention activity as well as quality enhancement. In spite of governmental and related institutions' efforts for reducing national losses which come from numerous accidents, there have been endless small and large accidents on the construction site and thus, it is urgent to conduct empirical researches in this area. Currently safety supervision system in construction industry has enforced harm and danger prevention planning system, however it merely stick to other existing materials. In addition, it is difficult to put it into practice in that it requires bearing too much burden to draw out the planning itself in a case of large construction work. Consequently in this paper we select evaluation criteria by construction progress, classify into several categories, and regard potential danger which often occurs, as a evaluation criterion. Further step is to allow workers or collaborated companies to express their expert opinions or experiences and to encourage quality and process control and autonomous safety control by applying PSM method. The reason why PSM method should be quantitative and substantial progress is because it contributes Korean constructing companies to enhancing their safety control ability and to taking an equal stance just like developed countries,' thereby strengthening there competitive edges. Boost of safety control system by PSM method will make an enormous contribution to preventing construction accidents on the site by establishing and securing an autonomous safety control system.

• 대한핵의학회지
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• 제37권4호
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• pp.207-218
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• 2003

Myocardial perfusion imaging has been increasingly used to provide prognostic data and guidance on the choice of appropriate management of patients with known or suspected coronary artery disease. The electrocardiogram gated myocardial SPECT program is corning into wide use with an advent of $^{99m}Tc-labeled$ tracers and an improvement of SPECT machines. The gated technique permits measurement of important cardiac prognostic indicators without any further discomforts or radiation burden in patients underwent standard myocardial perfusion SPECT. In addition, gated study significantly improves diagnostic yield by reducing the number of borderline interpretations and could find myocardial stunning and viable myocardium. Gated single photon emission computed tomography (SPECT) imaging allows the automated calculation of end-diastolic volume, end-systolic volume, ejection fraction, myocardial mass and the assessment of regional wall motion and thickening, and it have dramatically improved assessment of coronary artery disease in routine nuclear practice. This allows the simultaneous assessment of both perfusion and function within the same acquisition, and serves as a cost-effective technique for providing more diagnostic data with fewer diagnostic tests. Because the diagnostic and prognostic power derived from knowledge of left ventricular function can be added to that provided by assessing myocardial perfusion, gated SPECT imaging has rapidly gained widespread acceptance and is now used on a routine clinical basis in a growing number of laboratories, including South Korea. The gated SPECT technique for measurement of left ventricular parameters has been validated against a variety of well established techniques. In this work, overview of gated myocardial perfusion SPECT focus on functional parameters is presented.

• Journal of Information Processing Systems
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• 제14권4호
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• pp.1010-1032
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• 2018

Recent advances in medical science have made people live longer, which has affected many aspects of life, such as caregiver burden, increasing cost of healthcare, increasing number of disabled and depressive disorder persons, and so on. Researchers are now focused on elderly living assistance services in smart home environments. In recent years, assisted living technologies have rapidly grown due to a faster growing aging society. Many smart devices are now interconnected within the home network environment and such a home setup supports collaborations between those devices based on the Internet of Things (IoT). One of the major challenges in providing elderly living assistance services is to consider each individual's requirements of different needs. In order to solve this, the virtualization of physical things, as well as the collaboration and composition of services provided by these physical things should be considered. In order to meet these challenges, Web of Objects (WoO) focuses on the implementation aspects of IoT to bring the assorted real world objects with the web applications. We proposed a semantic modelling technique for manual and semi-automated service composition. The aim of this work is to propose a framework to enable RESTful web services composition using semantic ontology for elderly living assistance services creation in WoO based smart home environment.