• Earthquakes and Structures
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• 제18권1호
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• pp.129-145
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• 2020

Seismic resilience is a key feature for buildings that play a strategic role within the community. In this framework, not only the structural and non-structural elements damage but also the protracted structural dysfunction can contribute significantly to overall seismic damage and post-seismic crisis situations. Reduction of the residual and peak displacements and energy dissipation by replaceable elements are some effective aspects to pursue in order to enhance the resilience. Control systems able to adapt their response based on the nature of events, such as active or semi-active, can achieve the best results, but also require higher costs and their complexity jeopardizes their reliability; on the other hand, a passive control system is not able to adapt but its functioning is more reliable and characterized by lower costs. In this study it is proposed a strategy for the optimization of the dissipative capacity of a seismic resistant system obtained placing in parallel two different groups dissipative Re-Centering Devices, specifically designed to enhance the energy dissipation, one for the low and the other for the high intensity earthquakes. In this way the efficiency of the system in dissipating the seismic energy is kept less sensitive to the seismic intensity compared to the case of only one group of dissipative devices.

• 한국멀티미디어학회논문지
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• 제11권9호
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• pp.1238-1244
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• 2008

현재의 계층 간 네트워크 구조에서 각 레이어는 서로 독립적으로 작동하도록 설계되어 있다. 하지만 가변하는 통신 환경에 적응하기 위해 서로 다른 레이어 간에 통합 적응하는 크로스레이어를 디자인해야 할 필요성이 대두되고 있다. 본 논문에서는 크로스레이어 기반의 스케줄링 기법에 대해 다룬다. 기존의 스케줄링 기법들을 살펴보고 향후 무선통신환경에서 적용될 멀티미디어 서비스에 따른 스케줄링 기법을 제시한다. 이 기법은 멀티미디어 서비스의 다양성을 반영하여 좀더 효율적으로 무선자원을 관리한다. 그리고 무선 적응성을 향상시키기 위해 AMC를 적용하여 스케줄링 기법의 성능을 향상시켰다. 이렇게 제시된 기법은 다양한 환경을 적용하여 시뮬레이션을 통해 그 성능을 검증하였다.

• ETRI Journal
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• 제33권4호
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• pp.589-599
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• 2011

This paper presents an image description and matching scheme using synthetic features for a recommendation service. The recommendation service is an example of smart search because it offers something before a user's request. In the proposed extraction scheme, an image is described by synthesized spatial and statistical features. The spatial feature is designed to increase the discriminability by reflecting delicate variations. The statistical feature is designed to increase the robustness by absorbing small variations. For extracting spatial features, we partition the image into concentric circles and extract four characteristics using a spatial relation. To extract statistical features, we adapt three transforms into the image and compose a 3D histogram as the final statistical feature. The matching schemes are designed hierarchically using the proposed spatial and statistical features. The result shows that each feature is better than the compared algorithms that use spatial or statistical features. Additionally, if we adapt the proposed whole extraction and matching scheme, the overall performance will become 98.44% in terms of the correct search ratio.

• 대한가정학회지
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• 제41권3호
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• pp.131-146
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• 2003

The purpose of this study is to explore what makes the elderly women resilient in old age and how they reconstruct their later lives. This study used life histories extracted from tape-recorded interviews of 13 elderly women and analyzed key issues focused on how to adapt in old age. Main results are following: First, emerging themes to maintain life satisfaction in old age are related to both informants' inner and outer life worlds; subjective reinterpretation of life, feeling rich, family, social activities, overcoming social stigma. With supporting and supplementing one another, these five dimensions are important contributors to better later life. Second, where my informants search for meaning of life in old age is the critical clue of understanding the later life styles. Some of them are still searching meaning of life in roles as a ‘mother’, while others are finding their sense of worth outside the family or in themselves. These results show that the elderly are interacting with themselves and their surroundings in adapting to old age and different tie styles according to different sources of life satisfaction manifest the changes among the elderly and Korean society.

• 정보처리학회논문지A
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• 제12A권6호
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• pp.477-484
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• 2005

유비쿼터스 환경에서의 응용은 사용자의 요구사항 변경과 사용자의 서비스 환경 변화를 적응시킴으로써 사용자에게 최선의 서비스를 제공할 수 있어야 하며 상황 변화에 따른 하부 플랫폼의 동작에 서비스의 동작을 적응시킬 수 있어야 한다. 본 논문에서는 유비쿼터스 컴퓨팅 환경에서 사용자의 요구사항을 능동적으로 반영하고 사용자에게 유연한 서비스를 제공하기 위하여 상황 변화에 대한 동적인 응용 적응성을 지원하는 2-레벨 상황 적응 기법을 제안한다. 상황 적응성을 지원하기 위하여 상황의 범위를 사용자 요구사항으로 확대하여 응용 서비스 제공에 있어서 사용자의 선호도를 반영할 수 있도록 하였으며. 응용의 적응성은 적응 정책을 사용하여 발생할 수 있는 특정 상황에 대한 적응 방법을 명시적으로 요구함으로써 실제 상황이 발생했을 때 응용이 능동적으로 대처할 수 있도록 하였다.

• 정보처리학회논문지:소프트웨어 및 데이터공학
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• 제9권1호
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• pp.1-10
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• 2020

유동적으로 변화하는 환경에서 사용자의 요구에 따라 서비스를 제공하는 서비스 로봇은 클라우드 서비스와 같은 외부 서비스를 이용할 수 있어야 한다. 그러나 클라우드 서비스는 지속해서 변화하고 확장되므로 서비스의 기능 및 데이터 변경에 적응할 수 있는 일반적이고 유연한 인터페이스가 필요하다. 이를 위해 다양한 클라우드 서비스에 대한 모델 기반의 일반적인 인터페이스를 활용하여야 한다. 이러한 접근 방법을 통해 변경된 서비스에 접근할 수 있는 표준 서비스 프로파일을 정의함으로써 일반적이고 확장 가능한 인터페이스를 구현하였다. 또한, 지능형 서비스 로봇을 활용한 실험을 통해 새로운, 혹은 변경된 외부 서비스에 대해 유연하게 적응하는 결과를 검증하였다.

• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 2006년도 추계학술대회 학술발표 논문집 제16권 제2호
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• pp.39-44
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• 2006

Ship's collision avoidance is a skill that masters of merchant marine vessels have acquired through years of experience and that makes them feel at ease to guide their ship out from danger quickly compared to inexperienced officers. Case based reasoning(CBR) uses the same technique in solving tasks that needs reference from variety of situations. CBR can render decision-making easier by retrieving past solutions from situations that are similar to the one at hand and make necessary adjustments in order to adapt them. In this paper, we propose to utilize the advantages of CBR in a support system for ship's collision avoidance while using fuzzy algorithm for its retrieval of similar navigational situations, stored in the casebase, thus avoiding the cumbersome tasks of creating a new solution each time a new situation is encountered. There will be two levels within the Fuzzy-CBR. The first level will identify the dangerous ships and index the new case. The second level will retrieve cases from casebase and adapt the solution to solve for the output. While CBR's accuracy depends on the efficient retrieval of possible solutions to be adapted from stored cases, fuzzy algorithm will improve the effectiveness of solving the similarity to a new case at hand.

• 한국기후변화학회지
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• 제7권1호
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• pp.69-75
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• 2016

Recently, many countries all over the world have been suffered from disaster caused by climate change. Especially in case of developed countries, the disaster is concentrated in the industry sector. In this research, we analyzed industrial vulnerable homogeneous hotspot for the climate change using spatial autocorrelation analysis on the south Korea. Homogeneous hot spot areas through autocorrelation analysis indicate the spatial pattern of areas interacted each other. Industry sector have responsibility of green house gas emissions, and should adapt to the climate change caused by greenhouse gas already released. So, we integrated the areas sensitive to mitigation option with the areas hardly adapt to climate change because of vulnerable infrastructure. We expected that the result of this research could contribute to the decision-making system of climate change polices.

• 한국산업융합학회 논문집
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• 제22권3호
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• pp.337-351
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• 2019

We Proposed a new technology to develop vertical type multi-joint robot system enable to adapt in high temperature environment. The main contents is a new approach to design a vertical type articulated robot with prismatic joint and analysis of thermal for process automation of casting and forging. The proposed robot is suitable to use handling working parts of casting and forging. for the manufacturing process of forging and casting. The reliability is illustrated that the proposed technique is more stable and robust than the conventional system. This study is concerned with an analytical methodology of kinematic computation for 7 DOF manipulators for optimization of forging manufacturing process.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권1호
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• pp.172-185
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• 2019

In this paper, we investigate the performance of the diffusion adaptation strategies for parameter estimation in wireless adaptive networks, where the nodes exchange information over noisy and fading wireless channels. This paper shows the differences between the effect of Rayleigh and Rician fading over wireless adaptive networks and proves that the Rician fading is a more practical model in such kinds of networks. Simulation results imply that the effect of Rayleigh fading is more degrading for the estimation process than Rician fading. Also, the simulation results show the performance of adapt then combine (ATC) diffusion algorithm is better than the combine then adapt (CTA) algorithm by merely considering noise in wireless channels. While the performance of CTA prevails ATC over the wireless adaptive network in the presence of noise plus channel fading.