• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.308-313
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• 2005

For a real-time quadruped robot running control, there are many important objectives to consider. In this paper, the running control architecture based on global states, which describe the cyclic target motion, and central pattern is proposed. The main goal of the controller is how the robot can have robustness to an unpredictable environment with reducing calculation burden to generate control inputs. Additional goal is construction of a single framework controller to avoid discontinuities during transition between multi-framework controllers and of a training-free controller. The global state dependent neuron network induces adaptation ability to an environment and makes the training-free controller. The central pattern based approach makes the controller have a single framework, and calculation burden is resolved by extracting dynamic equations from the control loop. In our approach, the model of the quadruped robot is designed using anatomical information of a cat, and simulated in 3D dynamic environment. The simulation results show the proposed single framework controller is robustly performed in an unpredictable sloped terrain without training.

• 한국전자거래학회지
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• 제13권4호
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• pp.17-32
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• 2008

비즈니스 서비스 상호운용성을 지원하기 위해 W3C의 웹 서비스 명세인 WSDL을 확장한 비즈니스 서비스 문서(BSD, Business Service Document)를 설계하였다. WSDL이 소프트 웨어 컴포넌트의 상호운용성에 대한 포괄적인 표준을 제시하고, 용도와 목적에 따른 확장은 개별 사안으로 위임하고 있다. 이에 본 연구는 기존의 WSDL 대신 확장된 BSD를 활용하는 프레임워크를 비즈니스 웹 서비스 프레임워크(BWSF, Business Web Service Framework) 라 명명하고, BWSF의 핵심인 정확하고 유효하며 잘 짜여진 BSD 문서를 생성할 수 있는 BSD 생성기(BSD Creator)를 구축, 제시하였다. 본 논문의 결과물은 향후 산업별, 그룹별로 비즈니스 서비스 상호운용 체제를 구축하는데 기초가 될 것이며, 이를 활성화하는데 기여할 것으로 기대된다.

• 한국해양공학회:학술대회논문집
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• 한국해양공학회 2006년 창립20주년기념 정기학술대회 및 국제워크샵
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• pp.277-280
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• 2006

Most real world design evaluation and risk-based decision support combine quantitative and qualitative (linguistic) variables. Decision-making based on conventional mathematics that combines qualitative and quantitative concepts always exhibit difficulty in modelling actual problems. The successful selection process for choosing a design/procurement proposal is based on a high degree of technical integrity, safety levels and low costs in construction, corrective measures, maintenance, operation, inspection and preventive measures. However, the objectives of maximising the degree of technical performance, maximising the safety levels and minimising the costs incurred are usually in conflict, and the evaluation of the technical performance, safety and costs is always associated with uncertainties, especially for a novel system at the initial concept design stage. In this paper, a design-decision support framework using a composite structure methodology grounded in approximate reasoning approach and evidential reasoning method is suggested for design evaluation of machinery space of a ship engine room at the initial stages. It is a Multiple Attribute Decision-Making (MADM) or Multiple Criteria Decision Making (MCDM) framework, which provides a juxtaposition of cost, safety and technical performance of a system during evaluation to assist decision makers in selecting the winning design/procurement proposal that best satisfies the requirement in hand. An illustrative example is used to demonstrate the application of the proposed framework.

• 한국에너지공학회:학술대회논문집
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• 한국에너지공학회 1998년도 추계 학술발표회 논문집
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• pp.3-8
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• 1998

The present work proposes the potential fuzzy framework, based on fuzzy set theory, for supporting decision-making problems, especially, selection problems of a best design in the area of nuclear energy system. The framework proposed is composed of the hierarchical structure module, the assignment module, the fuzzification module, and the defuzzification module. In the structure module, the relationship among decision objectives, decision criteria, decision sub-criteria, and decision alternatives is hierarchically structured. In the assignment module, linguistic or rank scoring approach can be used to assign subjective and/or vague values to the decision analyst's judgment on decision variables. In the fuzzification module, fuzzy numbers are assigned to these values of decision variables. Using fuzzy arithmetic operations, for each alternative, fuzzy preference index as a fuzzy synthesis measure is obtained. In the defuzzification module, using one of methods ranking fuzzy numbers, these indices are defuzzified to overall utility values as a cardinality measure determining final scores. According these values, alternatives of interest are ranked and an optimal alternative is chosen. To illustrate the applicability of the framework proposed to selection problem, as a case example, the best option choice of four design options under five decision criteria for primary containment wall thickening around large penetrations in an advanced nuclear energy system is studied.

• 상하수도학회지
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• 제27권5호
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• pp.649-659
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• 2013

Real time control (RTC) can be broadly defined as a system that dynamically adjusts the operation of facilities in response to online measurements in the field to maintain and meet the operational objectives, both during dry and wet weather conditions. RTC adds a dynamic component that is actively adjusted in real time based on system conditions. In terms of reducing or eliminating sewer flooding, CSOs and/or managing flows, implementation of RTC has various benefits to sewer system operation. It has been emerging as an attractive approach, but related elements (such as framework for the application, its components and equipments, aspects to be considered) towards its application on sewer systems have not been throughly introduced so far. The main goal of this study is to review several applications of RTC and firm guidelines published abroad, and finally to provide a framework for the proper application of RTC on sewer systems.

• Smart Structures and Systems
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• 제16권1호
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• pp.1-26
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• 2015

Minimizing construction cost and reducing seismic damage are two conflicting objectives in the design of any new structure. In the present work, we try to develop a framework in order to solve the optimum performance-based design problem considering the construction cost and the seismic damage of steel moment-frame structures. The Park-Ang damage index is selected as the seismic damage measure because it is one of the most realistic measures of structural damage. The non-dominated sorting genetic algorithm (NSGA-II) is employed as the optimization algorithm to search the Pareto optimal solutions. To improve the time efficiency of the proposed framework, three simplifying strategies are adopted: first, simplified nonlinear modeling investigating minimum level of structural modeling sophistication; second, fitness approximation decreasing the number of fitness function evaluations; third, wavelet decomposition of earthquake record decreasing the number of acceleration points involved in time-history loading. The constraints of the optimization problem are considered in accordance with Federal Emergency Management Agency's (FEMA) recommended seismic design specifications. The results from numerical application of the proposed framework demonstrate the efficiency of the framework in solving the present multi-objective optimization problem.

• Wind and Structures
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• 제32권4호
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• pp.283-292
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• 2021

Performance-based seismic design (PBSD) is currently used for retrofitting of older buildings and the design of new buildings. Whereas, application of performance-based design for wind load is still under development. The tendency has been in the codes to increase wind hazard based on recent recorded events. Since tall buildings are highly susceptible to wind load, necessity for developing a framework for performance-based wind design (PBWD) has intensified. Only a few guidelines such as ASCE (2019) provide information on using PBWD as an alternative for code prescriptive wind design. Though wind hazards, performance objectives, analysis techniques, and acceptance criteria are explained, no recommendations are provided for several aspects like how to select a proper level of wind hazard for each target performance criterion. This paper is an attempt to explain current design philosophy for wind and seismic loads and inherent connection between the components of PBSD for development of a framework for PBWD of tall buildings. Recognizing this connection, a framework for PBWD based on limits set for serviceability and strength is also proposed. Also, the potential for carrying out PBWD in line with ASCE 7-16 is investigated and proposed in this paper.

• International Journal of Internet, Broadcasting and Communication
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• 제16권1호
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• pp.321-329
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• 2024

This study attempted to obtain implications for digital education policy by reviewing the Framework Acts and Enforcement Decrees related to digital education. To this end, the following were explored. First, the concept and components of digital competency were reviewed. Second, the Framework Acts and Enforcement Decrees related to digital education policy were reviewed using the above concepts. Third, the characteristics and implications of the Framework Acts and Enforcement Decrees for digital education were explored. The results are as follows: Korea's digital education policy tried to reflect the categories that digital competency must cover, even its function and dysfunction role. However, to achieve their purpose, it is necessary to maintain consistency with related laws or policies. We identified that amendments to the Basic Act and related articles are essential to effectively enforce the Digital-Based Distance Education Activation Basic Act. A reevaluation of the correlation between Article 10, emphasizing digital media literacy education, and Article 5 of the enforcement decree is necessary. Revision of the enforcement decree to align with Article 10's objectives is vital to ensure proactive measures for promoting digital literacy and competence as mandated by the Basic Act.

• 국제학술발표논문집
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• The 10th International Conference on Construction Engineering and Project Management
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• pp.1145-1152
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• 2024

Digital transformation has become a pivotal focus in the Architecture, Engineering, and Construction (AEC) industry, driven by an urgent need to enhance productivity and optimize resource management. This transformation plays an essential role throughout the entire project lifecycle, from the early stages of conception to the final phases of completion. The paper underscores the critical importance of aligning digital transformation initiatives with the broader business strategies of AEC organizations. This alignment is key to gaining a competitive edge and fostering sustainable growth within the industry. The paper introduces a comprehensive and adaptable strategic framework for digital transformation. This framework is designed to be flexible, allowing AEC organizations to tailor digital transformation strategies to meet their specific needs and objectives. The framework not only addresses the technological aspects but also considers the cultural and operational shifts required for successful implementation. Moreover, the paper delves into various aspects of digital transformation, such as data management, workflow automation, and the integration of emerging technologies like AI and IoT in AEC processes. It discusses the potential barriers to digital adoption and offers strategies to overcome these challenges. This paper serves as an in-depth guide for AEC organizations looking to seamlessly integrate digital technologies into their business models. It provides valuable insights and methodologies that are crucial for any entity in the AEC industry striving to thrive in an increasingly digitalized world, making it a must-read for leaders and decision-makers within the industry.

• 디지털융복합연구
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• 제17권8호
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• pp.89-94
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• 2019

퍼블릭 블록체인과 프라이빗 블록체인의 한계로 인해 여러 조직들이 컨소시엄 블록체인 시스템을 구현하고 있다. 조직이 블록체인을 활용하여 비즈니스를 수행하기 위해서는 조직의 전략과 목표에 따라 블록체인 온체인과 오프체인 상의 의사결정권, 책임성, 보상체계와 같은 '블록체인 거버넌스' 요소들을 고려해야 한다. 조직이 블록체인 거버넌스가 부재한 상태로 비즈니스를 수행하면 조직의 전략과 목표를 체계적이면서 효과적이고 효율적으로 달성할 수 없고, 조직의 이해관계자들의 기대 및 법규 등의 내 외부 요구사항들을 준수할 수 없다. 하지만 컨소시엄 블록체인을 기반으로 한 비즈니스가 확대됨에 따라 컨소시엄 블록체인 거버넌스가 필요로 한 상황임에도 불구하고 이에 대한 연구는 전무한 상황이다. 따라서 본 연구에서는 조직이 컨소시엄 블록체인을 활용한 비즈니스를 효과적이고 효율적으로 수행하도록 기능 및 역할과 책임을 포함한 컨소시엄 블록체인 거버넌스 프레임워크를 개발하였다. 또한 개발된 컨소시엄 블록체인 거버넌스 프레임워크의 타당성을 검토하기 위해, 두 차례에 걸쳐 블록체인과 거버넌스 관련 전문가들로 구성된 자문위원회를 통해 프레임워크를 검토하였다. 검토 결과 기능, 역할과 책임을 포함한 컨소시엄 블록체인 거버넌스 프레임워크의 구성 요소들이 완전하고 타당한 것으로 검토되었다.