• Smart Structures and Systems
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• 제3권3호
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• pp.385-403
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• 2007

The effectiveness of the newly developed smart passive control system employing a magnetorheological (MR) damper and an electromagnetic induction (EMI) part for seismic protection of base isolated structures is numerically investigated. An EMI part in the system consists of a permanent magnet and a coil, which changes the kinetic energy of the deformation of an MR damper into the electric energy (i.e. the induced current) according to the Faraday's law of electromagnetic induction. In the smart passive control system, the damping characteristics of an MR damper are varied with the current input generated from an EMI part. Hence, it does not need any control system consisting of sensors, a controller and an external power source. This makes the system much simpler as well as more economic. To verify the efficacy of the smart passive control system, a series of numerical simulations are carried out by considering the benchmark base isolated structure control problems. The numerical simulation results show that the smart passive control system has the comparable control performance to the conventional MR damper-based semiactive control system. Therefore, the smart passive control system could be considered as one of the promising control devices for seismic protection of seismically excited base isolated structures.

• 환경정책연구
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• 제5권1호
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• pp.71-97
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• 2006

본 연구는 미국 텍사스 주 오스틴 시의 환경정책 형성과정에 대한 역사적 고찰을 통해, 환경운동과 환경정책과의 관계를 파악하고 그 역사적 경험에 대한 이해를 목적으로 한다. 특히 가장 최근의 도시 환경정책으로서 "스마트 성장 정책(Smart Growth Initiative)"에 대한 정책분석을 시도한다. 오스틴은 과거 35년 동안 급속한 인구와 경제발전을 경험하였고, 이러한 과도한 발전에 대한 경험은 오스틴 시민들에게 환경적 인식을 키우는 계기가 되었다. 오스틴 시 정부는 "도시기본계획(Comprehensive Plans)", "분수계 보호 조례(Watershed Protection Ordinance)", 그리고 가장 최근의 "스마트 성장정책(Smart Growth Initiative)"에 이르기까지 다양한 환경정책 등을 통해 이러한 환경적 문제들에 대처하려고 노력하여 왔다. 본 연구의 결론은 다음과 같다. "환경적 이슈 등이 최근 30년간 오스틴 시의 정책적 우선순위가 되어 왔음에도 불구하고 환경정책 노력들이 시의 제도적인 부분으로 완전히 흡수되는 데에는 실패했다" 이러한 결론은 환경운동과 환경정치적 행위자들의 노력이 환경정책 형성에 있어 중요한 동기를 제공함에도 불구하고 진보적인 도시 환경체제(Progressive Environmental Regime)를 유지하는 데에는 충분하지 않음을 보여준다.

• 동아시아경상학회지
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• 제12권1호
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• pp.13-22
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• 2024

Purpose: The purpose of this study is to investigate impact of smart city awareness on citizen satisfaction and to measure various factors influencing smart city competitiveness that were rarely addressed in previous studies. For the impacts on the competitiveness of smart cities, this study explored the effects of data-driven service, economic impact, social trust through sharing, environmental protection, and sustainable growth. Research design, data and methodology: To collect data, this study employed an online survey conducted by a reputable research organization. Data analysis involved the use of factor analysis, ANOVA, and regression analysis. Results: This study identified key aspects important for enhancing citizen satisfaction. Furthermore, this research unveiled the significant impacts of data-driven service, economic impact, social trust through sharing, environmental protection, and sustainable growth on the competitiveness of smart cities. Conclusions: The results yield valuable managerial and policy implications. The study suggests that enhancing citizen satisfaction through improved awareness of the smart city is crucial for effective city marketing management. Additionally, the results highlight special aspects necessary to improve smart city competitiveness, including the implementation of promotional policies supported by the government, promoting global competitiveness for domestic companies, and fostering citizen participation for effective city marketing management.

• 한국지하수토양환경학회지:지하수토양환경
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• 제25권2_spc호
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• pp.70-85
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• 2020

This paper introduces the 'Smart Scoping for Environmental Investigations Technical Guide' issued by the US Environmental Protection Agency in 2018, which describes the use of smart scoping during lifecycle of remedial investigation projects. This paper also briefly summarizes the guidelines of soil and groundwater contamination investigation of South Korea. The smart scoping practices can support the development of a robust and realistic conceptual site model that is very useful for investigations and evaluations of the contaminated site. The application of evaluation tools relevant for the site-specific characteristics is important for the development of a conceptual site model. The smart scoping recommends the use of previous investigation data and implementation of best proven strategies for successful remedial investigation project. The use of smart scoping in contaminated site investigation will provide better management of contaminated sites.

• 한국융합학회논문지
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• 제12권1호
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• pp.77-87
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• 2021

도시생활에서 환경은 매우 중요한 요소이다. 환경요소는 스마트 도시 계획에서 꼭 다루어야 하는 주제이나, 도시 환경의 정보화 및 데이터 공유 부분은 현재 미흡한 상태여서 이를 개선할 필요가 있다. 본 연구는 난징시의 스마트화의 일환으로 친환경 정보화 건설 및 서비스 수요에 대한 심층조사를 진행하였고, 난징시의 스마트 도시 계획에 부합하면서, 환경의 품질을 개선하고 환경정보 서비스를 제공하는 지능형 친환경 정보 플랫폼의 디자인 연구와 그 구축에 대한 연구를 수행하였다. 또한 정보를 시각화 하는 부분에 대한 연구도 진행을 하였다. 이 결과는 난징 시 스마트 도시 구축에 중요한 모듈이다.

• Smart Structures and Systems
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• 제24권1호
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• pp.37-52
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• 2019

Despite its success and wide application, base isolation system has been challenged for its passive nature, i.e., incapable of working with versatile external loadings. This is particularly exaggerated during near-source earthquakes and earthquakes with dominate low-frequency components. To address this issue, many efforts have been explored, including active base isolation system and hybrid base isolation system (with added controllable damping). Active base isolation system requires extra energy input which is not economical and the power supply may not be available during earthquakes. Although with tunable energy dissipation ability, hybrid base isolation systems are not able to alter its fundamental natural frequency to cope with varying external loadings. This paper reports an overview of new adventure with aim to develop adaptive base isolation system with controllable stiffness (thus adaptive natural frequency). With assistance of the feedback control system and the use of smart material technology, the proposed smart base isolation system is able to realize real-time decoupling of external loading and hence provides effective seismic protection against different types of earthquakes.

• International Journal of Advanced Culture Technology
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• 제9권4호
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• pp.355-362
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• 2021

Through the Korean version of the New Deal 2.0, manufacturing-oriented SMEs are facing a new environmental change called smart factory construction. In addition, SMEs are facing new security threats along with a contactless environment due to COVID-19. However, it is practically impossible to apply the previously researched and developed security management system to protect the core technology of manufacturing-oriented SMEs due to the lack of economic capacity of SMEs. Therefore, through research on security management systems suitable for SMEs, it is necessary to strengthen their business competitiveness and ensure sustainability through proactive responses to security threats faced by SMEs. The security management system presented in this study is a security management system to prevent technology leakage applicable to SMEs by deriving and reflecting the minimum security requirements in consideration of technology protection point of view, smart factory, and remote access in a non-contact environment. It is also designed in a modular form. The proposed security management system is standardized and can be selectively used by SMEs.

• 한국위성정보통신학회논문지
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• 제7권2호
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• pp.1-7
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• 2012

최근들어, 에너지 자원과 환경보호의 중요성이 증가하면서, 친환경적인 소비패턴이 급격하게 증가하고 있다. 이에 따라 효율적인 에너지 소비기술이 여러 산업분야에서 주목받고 있다. 스마트그리드는 IT기술을 이용하여 에너지 효율을 상승시키는 기술로써, 이 중에서도 수요반응(Demand Response)기술은 스마트 그리드 안에서서 중요한 부분을 담당하는 기술이다. 본 논문은 과도한 전력 소모시대에 맞춰 효율적인 전력 소모를 위해 대두되고 있는 스마트그리드에 관한 전반적인 내용과 수요반응에 대한 개념, 그리고 이에 응용되는 수요반응 기술들과 그 예에 대하여 제시하고자 한다.

• 대한조선학회논문집
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• 제60권1호
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• pp.48-56
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• 2023

This paper implements many-to-many communication between users and develops a multi-functional smart helmet for worker protection and environmental safety in the shipbuilding and shipping industry. First, the communication situation is recorded in the field to perform signal processing for noise that interferes with communication. Then, it deals with the contents of developing smart helmets, data acquisition, algorithms, and simulations. The simulation results analyzed by applying the adaptive algorithm are shown, and their usefulness is confirmed. In conclusion, looking at the optimization process for the convergence factor of the Least Mean Square and Filtered-x Least Mean Square Adaptation Algorithm was possible. It is thought that it has laid the foundation for implementing many-to-many communication, the function of smart helmets that reduces or removes various noises at the shipyard in the future.

• 경영과학
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• 제33권1호
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• pp.49-58
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• 2016

Focusing on the drastic increase of smart devices, machine generated data expansion is a general phenomenon in network services and IoT (Internet of Things). Especially, built-in multi sensors in a smart device are used for collection of user status and moving data. Combining the internal sensor data and environmental information, we can determine landmarks that decide a pedestrian's locations. We use an ANOVA method to analyze data acquired from multi sensors and propose a landmark classification algorithm. We expect that the proposed algorithm can achieve higher accuracy of indoor-outdoor positioning system for pedestrians.