• Journal of Information Technology Applications and Management
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• 제16권4호
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• pp.93-107
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• 2009

This study investigated consumer preferences for Internet medical information service in China using the multi-attribute utility theory. The multi-attribute utility theory is a compositional approach for modeling consumer preferences wherein researchers calculate the overall service utility by summing up the evaluation results for each attribute. We found that Chinese Internet medical information users consider the availability of information and quick response to be the most important attributes. Further, they think that the comment feature is less important as compared to other attributes such as costs and updates. In addition, we found that the Internet users having more Internet experience consider these attributes to be more important as compared to the people who are just beginning to surf the Internet. For any successful Internet business, Internet marketers should assess individual-level preference and accordingly organize a fresh campaign. As of now, Internet marketers need estimation methods to predict the market performance of new services in many different business environments. We believe that the multi-attribute utility theory is a useful approach in this regard.

• Journal of Preventive Medicine and Public Health
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• 제38권3호
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• pp.252-258
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• 2005

Major approaches of Social epidemiology; 1)holistic, ecological approach, 2)population based approach, 3)development and life-course approach, 4)contextual multi-level approach, have stressed the importance of not only social context of health and illness, but also the population based strategy in the health interventions. Ultimately, it provides the conceptual guidelines and methodological tools to lead toward the healthy public policies; integrated efforts to improve condition which people live: secure, safe, adequate, and sustainable livelihoods, lifestyles, and environments, including housing, education, nutrition, information exchange, child care, transportation, and necessary community and personal social and health services.

• Journal of Information Technology Applications and Management
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• 제19권1호
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• pp.37-46
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• 2012

The scheduling problem of large products like ships, airplanes, space shuttles, assembled constructions, and automobiles is very complex in nature. To reduce inherent computational complexity, we often design scheduling systems that the original problem is decomposed into small sub-problems, which are scheduled independently and integrated into the original one. Moreover, the steep growth of communication technology and logistics makes it possible to produce a lot of multi-nation corporation by which products are produced across more than one plant. Therefore vertical and lateral coordination among decomposed scheduling systems is necessary. In this research, we suggest an agent-based coordinating mechanism for multi-level scheduling systems in supply chain. For design of a general coordination mechanism, at first, we propose a grammar to define individual scheduling agents which are responsible to their own plants, and a meta-level coordination agent which is engaged to supervise individual scheduling agents. Second, we suggest scheduling agent communication protocols for each scheduling agent topology which is classified according to the system architecture, existence of coordinator, and direction of coordination. We also suggest a scheduling agent communication language which consists of three layers : Agent Communication Layer, Scheduling Coordination Layer, Industry-specific Layer. Finally, in order to improve the efficiency of communication among scheduling agents we suggest a rough capacity coordination model which supports to monitor participating agents and analyze the status of them. With this coordination mechanism, we can easily model coordination processes of multiple scheduling systems. In the future, we will apply this mechanism to shipbuilding domain and develop a prototype system which consists of a dock-scheduling agent, four assembly-plant-scheduling agents, and a meta-level coordination agent. A series of experiment using the real-world data will be performed to examine this mechanism.

• 문화기술의 융합
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• 제7권4호
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• pp.337-342
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• 2021

본 연구의 목적은 아이코닉스를 중심으로 문화 콘텐츠 기업의 환경 및 전략 행태를 분석하고 지속적인 경쟁우위를 창출하기 위해 아이코닉스가 나아가야 할 전략적 제언을 도출하고자 한다. 분석 결과 아이코닉스는 이미 세계시장을 주도하는 미국, 유럽의 메이저들과 당당하게 경쟁할 수 있는 전천후 엔터테인먼트 콘텐츠 사업자로 발전해나가고자 하는 그들의 미션에 걸맞게 콘텐츠의 기획에서부터 사업에 이르는 수직 계열화된 개발-비즈니스 시스템 구축하고 있으며, 국내 및 해외를 포괄하는 강력한 글로벌 비즈니스 네트워크를 단계적으로 구축해나가며 고도의 글로벌 전략을 취하고 있다. 하지만 뽀로로의 성공에 의존하거나 조직 구조 내의 다양한 문제점으로 인해 한계에 부딪히고 있다. 이에 엔터테인먼트 산업 각 부문별 선도 회사들의 참여와 사업적 연계를 통해 콘텐츠의 부가가치를 극대화할 수 있는 One Source Multi Channel/Multi Use 전략을 기반으로 본 연구에서 제시한 다양한 전략적 제언들을 실행한다면 안정화된 Total Entertainment Contents 산업에서의 선두주자로 자리매김할 것이다.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 추계학술대회논문집A
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• pp.579-583
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• 2001

Cause of noise/vibration for the sheet feeding apparatus of digital MFP is investigated by analyzing the measured sound pressure and the strategy for reducing the noise level is suggested. Factors related to the noise/vibration are found by loading test and the measurement of the noise by assembling the components. By checking the center distance between gears and the boss height, precision of assembly is identified as a main factor of noise. From the result of analysis, it can be concluded that the noise level of sheet feeding apparatus can be reduced by maintaining the distance between gears and the precision of assembly adequately.

• 제어로봇시스템학회논문지
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• 제11권4호
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• pp.322-329
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• 2005

This paper considers the application of mobile robot to the herding problem. The herding problem involves a ‘pursuer’ trying to herd a moving ‘evader’ to a predefined location. In this paper, two mobile robots act as pursuer and evader in the fenced area, where the pursuer robot uses a fuzzy cooperative decision strategy (FCDS) in the herding algorithm. To herd evader robot to a predefined position, the pursuer robot calculates strategic herding point and then navigates to that point using FCDS. FCDS consists of a two-level hierarchy: low level motion descriptors and a high level coordinator. In order to optimize the FCDS, we use the multi­thread evolutionary programming algorithm. The proposed algorithm is implemented in the real mobile robot system and its performance is demonstrated using experimental results.

• 수산경영론집
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• 제45권1호
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• pp.109-119
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• 2014

This study aimed to examine the applicability of a portfolio approach to the ecosystem-based fisheries management targeting the large purse seine fishery. Most fisheries are targeting multispecies and species are biologically and technically interacted each other. It enables a portfolio approach to be applied to find optimal production of each species through expected returns and risk analyses. Under specific assumptions on the harvest quota by species, efficient risk-return frontiers were generated and they showed a combination of optimal production level. Comparisons between portfolio and actual production provided a useful information for targeting strategy and management. Results also showed the possibility of effective multispecies fisheries management by imposing constraints on each species such as total allowable catch quotas.

• Nuclear Engineering and Technology
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• 제56권7호
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• pp.2595-2609
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• 2024

This paper introduces a base isolation system-tuned mass damper inerter (BIS-TMDI) hybrid system to the AP1000 nuclear power plant (NPP), which reduces seismic damage potential of the NPP structure. The effects of fluid-structure interaction (FSI) caused by the passive containment cooling system water storage tank (PCCWST) on NPP's seismic performance are investigated. The FSI of water tank theoretical model is considered based on the Housner's model, and a series of time history analyses are performed to prove the rationality of the proposed model. Three single-objective optimization strategies are employed to minimize the relative displacement variance and absolute acceleration variance of the upper structure, as well as the filtered energy index (FEI). Furthermore, a multi-objective optimization strategy considering all these three indexes is proposed to obtain optimal parameters of vibration control. The influence of vibration control strategies on the relative deformation and acceleration of the upper structure is explored with various water level ratios. The analytical results indicate that the proposed BIS-TMDI strategy has significantly reduced the NPP structure's seismic response. The effectiveness of the vibration control strategy is influenced by the water level ratio, emphasizing the significance of designing an appropriate water level ratio to reduce NPP structure's seismic response.

• 한국정보과학회논문지:소프트웨어및응용
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• 제30권12호
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• pp.1208-1219
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• 2003

인터넷은 이미 우리 생활의 한 부분이 되었으며, 많은 생활 환경들이 인터넷을 중심으로 변화되고 있으며 그 중 가장 두드러진 분야가 전자상거래 이다. 그러나 현재의 전자상거래는 판매자가 일방적으로 제시하는 조건에 구매자는 단순히 거래를 하거나, 제시된 조건을 비교하여 보다 더 좋은 조건을 찾는 수준에 머물러 있다. 향후 전자상거래는 어느 한쪽의 일방적인 제시가 아닌 서로의 이익을 최대화 할 수 있는 방안 중의 하나인 협상(negotiation)이 필수적이며, 또한 전자상거래가 전통적인 상거래 행위를 대신 할 수 있도록 하기 위해 하나의 속성이 아닌 더 많은 협상 대상을 요구하게 된다. 본 논문의 목적은 다중 속성을 이용한 협상을 통해 두 에이전트 사이의 균형 있는 이익과, 높은 협상 성사율을 이룰 수 있는 시간제약 환경에서의 협상 모델을 제안한다. 협상 모델은 두 에이전트가 각각의 협상 시간을 가지고 다중 속성에 대해 두가지 속성 값 변경 전략(교차적, 동시 전략)과 서로의 제안 값 선택 전략을 제시하고, 제안된 동일한 형태의 협상 메커니즘별로 두 에이전트간의 협상 모델을 평가한다. 또한 제안된 협상 모델의 비교를 위하여 또 다른 협상 모델을 구현하여 비교 하였다. 제안된 협상 모델에서 동적인 conceder 협상 방법과 선형적 협상 방법이 두 에이전트간의 균형 있는 이익과 높은 협상 성사율을 보여 주었고, 전체적으로 교차적 속성 값 변경 전략을 사용 하였을 때 두 에이전트의 유틸리티 값의 합이 높은 것으로 나타났다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제17권10호
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• pp.2658-2681
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• 2023

In edge computing scenarios, IoT end devices play a crucial role in relaying and forwarding data to significantly improve IoT network performance. However, traditional routing mechanisms are not applicable to this scenario due to differences in network size and environment. Therefore, it becomes crucial to establish an effective and reliable data transmission path to ensure secure communication between devices. In this paper, we propose a trusted path selection strategy that comprehensively considers multiple attributes, such as link stability and edge cooperation, and selects a stable and secure data transmission path based on the link life cycle, energy level, trust level, and authentication status. In addition, we propose the Stability-based On-demand Multipath Distance Vector (STAOMDV) protocol based on the Ad hoc AOMDV protocol. The STAOMDV protocol implements the collection and updating of link stability attributes during the route discovery and maintenance process. By integrating the STAOMDV protocol with the proposed path selection strategy, a dependable and efficient routing mechanism is established for IoT networks in edge computing scenarios. Simulation results validate that the proposed STAOMDV model achieves a balance in network energy consumption and extends the overall network lifespan.