• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 2001.11a
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• pp.396-400
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• 2001

본 논문은 현재 안전한 운영체제 개발에 사용되고 있는 강제 접근통제(MAC)와 역할행위 기반 접근통제(RBBAC)의 혼합 기법인 다중 등급 역할 행위 기반 접근통제 (ML/RBBAC)를 제안하고, 접근통제 모델을 기술한다. ML/RBBAC은 안전한 운영체제가 MAC과 RBBAC을 동시 지원하기 위한 최적의 방법이며, 기존 MAC의 단점인 지나치게 엄격한 정보흐름 통제 및 보안 관리 부담의 증대 문제를 해결한다.

• Journal of the Korean Society of Systems Engineering
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• v.1 no.2
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• pp.56-62
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• 2005

In this study, we first define user requirements to fulfill the reconnaissance and the search missions, by analyzing the system characteristics and operation environment. By investigating the design technology level, the development and procurement costs, the strong system design concepts and possible alternatives will be proposed. To analyze the system requirements, the Quality Function Deployment of the systems engineering approach will be implemented. The promising design alternatives that satisfy the user requirements are extracted by constructing the Morphological Matrix, then the best design concept will be obtained using the Pugh Concept Selection Matrix and the TOPSIS(Technique of Order Preference by Similarity to Ideal Solution).

• Journal of Electrical Engineering and information Science
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• v.2 no.6
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• pp.162-166
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• 1997

A message server have two basic functionalities, a server role for processing the processing the user environment as well as an entity role for transferring message to other entity in message system environment. The user who is going to send and receive his important information really wants to keep his own security requests. To satisfy this requirement, message server must be enforced by two seperated security policies- one for message processing security policy under department's computer working environment, the other for send/receive security policy under message system's communication path environment. Proposed access control model gurantees the user's security request by combining constrained server access control and message system access control with multi upper bound properties which come from inheritance attributes of originating user security contexts.

• Journal of Family Resource Management and Policy Review
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• v.13 no.2
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• pp.153-167
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• 2009

This research analyzes factors of family life adjustment in mixed-culture families through a focus group and individual interviews with nine mixed-culture couples eighteen people who live in city C. First, the reason that women of other cultures wants to marry Korean men is because they find it a good opportunity, as they expect that Korean husbands will take responsibility of their family. On the other hand, Korean men also expect that they would have some similarities to each other. Also, in southeastern Asian men have more freedom than women to choose an international marriage in Southeastern Asia. Second, mixed-culture couples in everyday life are affected by communication problems, cultural differences, natural environment, financial situation, male -dominant attitude, self-adjustment pressure, house-work role and financial support from their own country. Third, wives from other cultures ask for social support to adjust in Korea and make a healthy family. These women can be important, as they have their own role in the family even though they may be far from their mother in law's strong expectation in how well she can adopt Korean culture.

• Korean Journal of Child Studies
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• v.31 no.5
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• pp.79-99
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• 2010

This study inquired into the life and experiences of two elder sisters who have different individual and familial risk factors and their younger brothers from the mixed-age preschool class through ethnographic research method using participant observation. The results showed that an elder sister from low-income multi-children family played her role very actively through caring for, learning and playing with younger brother during almost of the play situations. On the other hand, the other elder sister who has experience of depression, showed strong possessiveness and neglect of younger brother. As for psychological aspects of sibling relationship, the elder sisters were suffering psychological stresses resulted from excessive role expectation in family or from self-recognition on elder sister role, respectively.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.6 no.10
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• pp.2473-2492
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• 2012

Energy conservation is a vital issue in wireless sensor networks. Recently, employing mobile sinks for data gathering become a pervasive trend to deal with this problem. The sink can follow stochastic or pre-defined paths; however the controlled mobility pattern nowadays is taken more into consideration. In this method, the sink moves across the network autonomously and changes its position based on the energy factors. Although the sink mobility would reduce nodes' energy consumption and enhance the network lifetime, the overhead caused by topological changes could waste unnecessary power through the sensor field. In this paper, we proposed EEDARS, an energy-efficient dual-sink algorithm with role switching mechanism which utilizes both static and mobile sinks. The static sink is engaged to avoid any periodic flooding for sink localization, while the mobile sink adaptively moves towards the event region for data collection. Furthermore, a role switching mechanism is applied to the protocol in order to send the nearest sink to the recent event area, hence shorten the path. This algorithm could be employed in event-driven and multi-hop scenarios. Analytical model and extensive simulation results for EEDARS demonstrate a significant improvement on the network metrics especially the lifetime, the load and the end-to-end delay.

• Environmental Engineering Research
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• v.15 no.2
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• pp.99-103
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• 2010

Integrated management systems (IMS) that control entire sewerage facilities in the upper reaches of multi-purpose dams are being constructed for their efficient operation and management. However, because the IMS installed in a watershed belong to several local government bodies, significant conflict would be expected between stakeholders in the process of deciding who should control the IMS after completion of the construction that was initially implemented under the support of central government. The objective of this study was to suggest a decision making to determine who should control the IMS for sewerage facilities in the upper reaches of multipurpose dams in Korea, using the analytic hierarchy process (AHP). Three alternatives were selected to determine who should control the IMS for sewerage facilities: commissioning to public corporations, commissioning to private corporations, and a role-sharing partnership. In using the AHP technique, the emphasis was on comparing public interests, economics, efficiency, sustainability, specialty, grievance mediation and receptiveness. As a result, building a role-sharing partnership received the highest score. Commissioning to a special institute was also suggested as an alternative as this showed a score similar to that of building a role-sharing partnership.

• Korean Journal of Construction Engineering and Management
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• v.14 no.2
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• pp.35-44
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• 2013

Multi-trade Contract Method was introduced as a means of cutting down construction cost of public housing for low income people. Before a specific project delivery method is applied to large public construction project, it is necessary to discuss all the issues raised up from all the parties in construction industry and all the issues which can impact project performance. Thus the interviews were conducted with industrial professionals from diverse organizations and previous studies were investigated to figure out how this newly introduced project delivery method may impact owner's role and responsibility and project performance in terms of cost, schedule, quality and risk. Under the Multi-trade Contract Method, project owner's management tasks will be highly increased, so it should be checked out if the owner can do its role and responsibility. Public owner's organization also needs to be changed and proper project management procedure and system need to be established. In addition, for efficient application of Multi-trade Contract Method, public owner should consider diverse management approach to deliver the project, and how to select and maintain qualified specialty trades.

• 시스템엔지니어링워크숍
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• s.4
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• pp.113-118
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• 2004

• Journal of Families and Better Life
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• v.28 no.4
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• pp.89-101
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• 2010

Increased multi-cultural families over the recent decade have led to more studies on the current situations and problems they face. Fathers in multi-cultural families are supporters who can help their migrant wives adapt their new surroundings; however, it is difficult to find studies on them as their roles as fathers in multi-cultural families have been overlooked. This study develops educational programs for fathers in multi-cultural families and analyzes the effect of the educational programs. The educational program development for fathers in multi-cultural families was based on consideration of related articles, studies, and reports. The effect analysis for the educational program for fathers in multi-cultural families was performed through the investigation of 'self-esteem' and 'parent self-confidence' about educated fathers in multi-cultural families. The educational program for fathers in multi-cultural families was composed of 5 themes which can improve their self-esteem, understand the father's role and function, learn the skills of playing and conversation with their children and express the father's thoughts for his own family using positive methods. We educated 12 fathers in multi-cultural families through the development of the program over 5 weeks to verify the effect of educational programs for fathers in multi-cultural families. The results showed the following : The level of father's self-esteem in multi-cultural family increased 124% and the level of parent self-confidence increased 141%. In conclusion, the educational effect for fathers in multi-cultural family exists and their desire for a successful multi-cultural family increased through the educational programs.