• Smart Structures and Systems
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• 제14권2호
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• pp.85-104
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• 2014

Damage detection is a challenging, complex, and at the same time very important research topic in civil engineering. Identifying the location and severity of damage in a structure, as well as the global effects of local damage on the performance of the structure are fundamental elements of damage detection algorithms. Local damage detection is essential for structural health monitoring since local damages can propagate and become detrimental to the functionality of the entire structure. Existing studies present several methods which utilize sensor data, and track global changes in the structure. The challenging issue for these methods is to be sensitive enough in identifYing local damage. Autoregressive models with exogenous terms (ARX) are a popular class of modeling approaches which are the basis for a large group of local damage detection algorithms. This study presents an algorithm, called Influence-based Damage Detection Algorithm (IDDA), which is developed for identification of local damage based on regression of the vibration responses. The formulation of the algorithm and the post-processing statistical framework is presented and its performance is validated through implementation on an experimental beam-column connection which is instrumented by dense-clustered wired and wireless sensor networks. While implementing the algorithm, two different sensor networks with different sensing qualities are utilized and the results are compared. Based on the comparison of the results, the effect of sensor noise on the performance of the proposed algorithm is observed and discussed in this paper.

• Steel and Composite Structures
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• 제23권5호
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• pp.571-583
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• 2017

A kind of accordion-web RBS connection, "Tubular Web RBS (TW-RBS)" connection is proposed in this research. TW-RBS is made by replacing a part of web with a tube at the desirable location of the beam plastic hinge. This paper presents first a numerical study under cyclic load using ABAQUS finite element software. A test specimen is used for calibration and comparison of numerical results. Obtained results indicated that TW-RBS would reduce contribution of the beam web to the whole moment strength and creates a ductile fuse far from components of the beam-to-column connection. Besides, TW-RBS connection can increase story drift capacity up to 9% in the case of shallow beams which is much more than those stipulated by the current seismic codes. Furthermore, the tubular web like corrugated sheet can improve both the out-of-plane stiffness of the beam longitudinal axis and the flange stability condition due to the smaller width to thickness ratio of the beam flange in the plastic hinge region. Thus, the tubular web in the plastic hinge region improves lateral-torsional buckling stability of the beam as just local buckling of the beam flange at the center of the reduced section was observed during the tests. Also change of direction of strain in arc shape of the tubular web section is smaller than the accordion webs with sharp corners therefore the tubular web provides a better condition in terms of low-cycle fatigue than other accordion web with sharp corners.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2006년도 추계학술발표대회 논문집
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• pp.260-266
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• 2006

The construction of settlement house in a permanent rental housing development area started between 1989 and 1992, planning of supplying two hundred fifty thousand residences, settlement house became compulsory as a welfare facilities. As a part of Welfare program for low income families, number of settlement housing increased dramatically, also domiciliary welfare center was beginning to set up as a branch of settlement housing to strengthen its service towards families and local communities, thus numerous social welfare organizations play a crucial part in resolving a welfare problem for low income families while satisfying local community's needs. However, despite of these efforts, the number if institutions cannot handle demand of local community's needs and number of welfare institution programs. as a solution, the alternation of space is being used, however, it did not solve basic problem, even worsen in terms of space efficiency.

• 경영과정보연구
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• 제13권
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• pp.99-125
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• 2003

The purpose of this study is to improve local government accounting system for value creation. In order to achieve this object: First, improvement of public finance policy can be obtained through connection of policy and estimate, and evaluation of soundness and rationality of tax system. Second, innovation of appropriation is achieved through effective division of cost, efficient division of budgetary resources and perfect accrual accounting. Third, a performance report must include accurate performance measures and performance indicators, for its effect is linked to public finance policy. Fourth, general principles of local government accounting must include significance, reliability, consistency with user concepts, relevance, understandability and comparability for financial reports.

• 동아시아경상학회지
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• 제3권3호
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• pp.27-34
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• 2015

The authors consider, that the effectiveness of the government's activity, the improvement of decisions' quality depends on implementation of modern innovative technologies through activation the direct and feedback connection between public authority system and the business -community, through increasing the level of their collaboration by participating in solving main social problems and discu ssing innovative projects (initiative) according questions about socio-economic development of the country, improving the system of the state and local government in the Republic of Kazakhstan.

• 생물환경조절학회지
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• 제29권4호
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• pp.473-479
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• 2020

본 연구는 단조가력 하중을 받는 실물크기 비닐온실의 기둥-서까래-도리 접합부의 역학적거동을 알아보기 위해 현장에서 시공되고 있는 두 가지 형식의 실험체로 구조실험을 수행하였다. 실험결과를 바탕으로 두 가지 형식의 접합부에 대해서 휨성능을 분석하고 접합부 분류를 시도하였다. Type B는 Type A에 비해 휨 성능이 77% 수준으로 나타났으며 두 형식 모두 강성 및 휨내력이 강접합 수준에 미치지 못하는 것으로 나타났다. 기둥-서까래-도리 접합부의 거동은 용접부 및 체결구 변형에 의한 국부좌굴이 지배적이었다. AISC 기준에 의한 접합부 분류 결과, Type A와 B 접합부 모두 설계 시 가정하는 강접합 성능에 미치지 못하는 결과를 보였으며 단순 접합으로 분류되는 것으로 나타났다. 따라서 접합부 성능평가 및 분류 결과, 접합부 성능을 고려한 온실 설계가 이루어져야 하며 신뢰성 높은 온실 구조설계를 위해서 온실 접합부에 대한 명확한 설계기준 정립 연구가 필요할 것으로 판단된다.

• 한국농촌건축학회논문집
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• 제22권4호
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• pp.51-62
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• 2020

Article 6 of the Landscape Act stipulates that "the Minister of Land, Infrastructure and Transport establishes a basic landscape policy plan every five years in order to create a beautiful and pleasant landscape, discover and support excellent landscapes." This is a comprehensive plan for landscape policy, a national plan that presents basic directions and strategies for the formation and continuous management of excellent national landscape. The basic landscape policy plan is a plan established every five years. It is an action plan that establishes a medium-term strategy for landscape policy and proposes specific implementation plans. Landscape-related policies are established in various fields, such as the central and local governments, and the private sector, and are based on mutual cooperation. Local cities voluntarily establish basic landscape plans, but in terms of integration, there are few cases in connection with urban regeneration. However, when the existing city establishes the basic landscape plan, the effect will be doubled if a new city is comprehensively constructed in relation to urban regeneration from the overall aspect of the city. Therefore, this study aims to provide data so that a master landscape plan can be established by analyzing and synthesizing the problems of the existing city centering on Jeonju, a representative local city.

• 한국멀티미디어학회논문지
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• 제10권10호
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• pp.1295-1309
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• 2007

인프라스트럭처 모드 기반의 무선랜(Wireless Local Area Networks)을 사용하는 무선 홈네트워크에서는 모든 무선 단말간의 통신이 액세스포인트를 통하여 이루어진다. 따라서 무선 단말이 음영 지역(Dead Zone)으로 이동하면 이동한 무선 단말과 액세스포인트간의 통신이 불가능하여 끊김없는 연결(Seamless Connection)을 제공하지 못하는 문제점이 있다. 기존의 무선 홈네트워크 플랫폼에서는 이러한 문제를 해결하기 위하여 애드 혹 모드로 동작하는 무선 홈네트워크 구조에 대하여 연구하고 있지만, 애드 혹 모드 기반의 무선랜은 인프라스트럭처 모드 기반 무선랜에 비하여 네트워크 용량이 제한되는 문제가 있다. 그리고 무선 단말의 이동성을 지원하기 위해서는 애드 혹 라우팅 기법이 필요하다. 그러나 기존의 AODV 및 DSR 라우팅 기법은 무선 채널 정보를 참조하지 않고 네트워크 계층에서 독립적으로 라우팅을 수행하기 때문에 무선 채널의 상황에 빠르게 대처할 수 없어 끊김없는 연결을 제공할 수 없다. 이에 본 논문에서는 종단간 끊김없는 데이터전송을 보장하기 위한 ESCOD(End-to-end Seamless multi-hop COnnection based on Dual network mode) 기반의 무선 홈네트워크 플랫폼과 VLR(Virtual Link Routing) 기법을 제안하였다. 구현된 시스템의 성능을 평가한 결과, VLR을 탑재한 ESCOD 기반의 무선 홈네트워크 플랫폼은 기존의 AODV 및 DSR 라우팅 보다 낮은 패킷 전송의 실패율과 빠른 패킷의 평균 전송시간을 제공함과 동시에 기존 인프라스트럭처 모드만을 제공하는 무선 홈네트워크 플랫폼보다 넓은 통신 범위와 향상된 TCP 성능을 확인하였다.

• 한국정보시스템학회지:정보시스템연구
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• 제33권1호
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• pp.45-68
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• 2024

Purpose This paper examines the role of local market-based communities in driving regional revitalization, using detailed analysis of online networks. We aim to dissect a local community's communication network, highlighting members with high engagement levels and exploring their characteristics. Our goal is to identify the conditions that allow local community networks to grow independently and to demonstrate how the activation of these networks contributes to regional revitalization. Design/methodology/approach We employ a mixed-methods approach, combining social network analysis with statistical techniques to investigate the structure of online communication networks. Specifically, we use ANOVA to determine the statistical significance of our findings, ensuring their reliability. To complement our quantitative data, we include qualitative insights from interviews, adding depth and context to our analysis. Findings Our results show that individuals with high centrality in the online network are crucial for maintaining active local communities. We find that leveraging local resources to create a supportive and adaptable environment is essential for the communities' sustainability and expansion. Importantly, our research draws a direct connection between the vitality of local community networks and the broader process of regional revitalization. We argue that energizing local communities is an effective way to address the risk of regional decline. By integrating quantitative analysis with qualitative feedback, this study contributes to the understanding of local market-based communities as key drivers of regional development. It emphasizes the importance of building vibrant, resourceful community networks to revitalize areas experiencing socio-economic challenges.

• 한국산학기술학회논문지
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• 제17권6호
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• pp.360-371
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• 2016

폴 루돌프의 플로리다 지역 주택은 2차 세계대전 이후 형식적인 근대 건축에서 탈피한 다양한 공간 구성, 지역 재료 및 구법의 사용으로 지역적 특성을 반영한 사례이다. 플로리다 주택 작품은 시대적, 지역적인 특성을 기반으로 하여 공간의 확장 및 연결 그리고 지역 환경을 고려한 재료 및 구법, 구조 시스템을 표현해야 한다는 설계 개념이 반영된 건축이다. 플로리다 주택의 특성은 공간 확장 및 외부 공간 연결 기법으로 목재 구조체를 중심으로 한 공간 확장과 가변적 공간구현 그리고 외부공간의 적극적인 연계성을 유도하기 위하여 다양한 방법(스크린 지붕, 오픈 지붕, 내부 파티오)을 사용하였다. 그리고 지역 재료 사용 그리고 지역 환경에 적합한 디테일 및 구법 사용으로 플로리다 지역의 석회암과 사이프러스 목재를 주된 재료로 사용하고, 고온 다습한 기후에 적합한 디테일과 지역 건설 환경을 고려한 구법을 사용하였다. 폴 루돌프의 플로리다 주택 연구를 통하여 현대 건축의 지역성을 고려한 계획에 구체적으로 적용 가능한 공간적, 기술적 적용 방법에 대한 모범사례로서 제안하는데 그 의미를 찾고자 한다.