• International Journal of Fuzzy Logic and Intelligent Systems
• /
• 제7권1호
• /
• pp.77-84
• /
• 2007

In this paper, Takagi-Sugeno (TS) fuzzy integral control is investigated to regulate the output voltage of an asymmetric half-bridge (AHB) DC/DC converter; First, we model the dynamic characteristics of the AHB DC/DC converter with state-space averaging method and small perturbation at an operating point. After introducing an additional integral state of the output regulation error, we obtain the $5^{th}$-order TS fuzzy model of the AHB DC/DC converter. Second, the concept of the parallel distributed compensation is applied to design the fuzzy integral controller, in which the state feedback gains are obtained by solving the linear matrix inequalities (LMIs). Finally, simulation results are presented to show the performance of the considered design method as the output voltage regulator and compared to the results for which the conventional loop gain method is used.

• 한국자동차공학회논문집
• /
• 제21권5호
• /
• pp.162-168
• /
• 2013

Recently, there have been efforts in many countries to reduce social expenses and casualties resulting due to car accidents. As such, ASS (active safety systems) are being researched and developed to prevent accidents and target mitigation. Among many useful active safety systems, it has been reported that commercial AEBS (Advanced Emergency Braking System) effectively prevents accidents and reduces casualties simultaneously. Accordingly, it is necessary to set Korean AEBS standards, and this research analyzes international AEBS standards for this necessity. In addition to the evaluation methodology of AEBS ECE Regulation, this study suggests traffic scenarios that occur frequently in domestic road environments, and provides an evaluation system for AEBS of the scenarios. Finally, the performance and safety of AEBS are evaluated through field test.

• International Journal of Automotive Technology
• /
• 제7권6호
• /
• pp.659-666
• /
• 2006

EGR(Exhaust Gas Recirculation) systems are extensively used to reduce NOx emissions in light duty diesel engine but its application to heavy duty diesel engines is yet to be widely implemented. In this study, the simulation model for a EURO 3 engine was developed using WAVE and then its performance and emission levels were verified with experimental results. The possibility of operating a EURO 3 engine with LPL EGR system to satisfy the EURO 4 regulation was investigated. Each component of the engine was modeled using CATIA and WaveMesher. The engine test mode was ESC 13, and the injection timing and fuel quantity were changed to compensate for the reduction of engine power caused by applying EGR. As a result of the simulation, it was found that EURO 4 NOx regulation could be satisfied by applying an LPL EGR system to the current EURO 3 engine.

• 한국정보통신학회:학술대회논문집
• /
• 한국정보통신학회 2016년도 춘계학술대회
• /
• pp.621-624
• /
• 2016

분계점은 전기통신설비에 대해 사업자와 이용자 간의 설비영역을 구분하여 분쟁을 예방하고 유지의 효율성을 제고하기 위한 규정이다. 현행 분계점 기준은 전화통신망을 중심으로 규정되어 있어 새로운 서비스와 설비의 도입에 따른 다양한 접속 방식에 대해 적용성의 검토가 필요하다. 본 논문에서는 분계점에 대한 국내외 규정을 분석하고 고려되어야 할 사항에 대해 고찰하기로 한다.

• 한국병원경영학회지
• /
• 제8권2호
• /
• pp.111-129
• /
• 2003

This study discusses the direction of legislation to strengthen the legal protection of medical records privacy in information age. The legislation trends on privacy protection of medical records in European Union and United States are analysed and the current law and regulation of Korea on medical records are compared. The issues discussed include the ownership of medical records, the patient's right of access to medical records, medical information publication for other than treatment or insurance processing use, confidentiality responsibility of provider organizations, medical information management in provider organizations, penalty for the unlawful use of patient information. This study concludes that the patients' right on medical record and provider organization's responsibility in processing patient information should be strengthened in order to protect patients' privacy and to conform to the international standard on medical record protection in the information age.

• 국제학술발표논문집
• /
• The 5th International Conference on Construction Engineering and Project Management
• /
• pp.42-46
• /
• 2013

California's heartland, the Great Central Valley, is one of the most productive agricultural regions in the world. However for many years the valley has been struggling with a broad range of social, economic, and environmental challenges. Some significant concerns include water resources, air pollution, poverty rates, housing issues, etc. Another strike against the valley is the relative reluctance to embrace widespread sustainable building practices. This paper discusses the long-term and profound impact of the built environment has on the aforementioned socioeconomic and environmental issues facing the valley. It reviews exemplary practices in other states and regions regarding policy-making and regulation in the building industry as well as sustainable community development. The paper further explores viable options specifically for the Fresno metropolitan area (the largest in the Central Valley) to combat its unique multifaceted challenges.

• International Journal of Industrial Entomology and Biomaterials
• /
• 제47권2호
• /
• pp.134-139
• /
• 2023

SIRT5 and PRDx1 play crucial roles in cancer and are involved in the basic mechanisms of reactive oxygen species detoxification. In our previous studies, we showed that hemolymph extracts of immune-challenged Bombyx mori have antioxidant properties. Following H₂O₂ stimulation, immune-challenged B. mori hemolymph extracts elicited SIRT5 downregulation activity, reaching effective activity at the highest concentration of 100 ppm. Additionally, cells treated with immune-challenged B. mori hemolymph extracts demonstrated increased PRDx1 mRNA expression compared to that of PBS-treated cells. Therefore, immune-challenged B. mori hemolymph extracts offer a potential auxiliary means of treating drug-resistant tumors through downregulation of SIRT5 and upregulation of PRDx1 expression. Nevertheless, further studies on the effects of B. mori hemolymph on SIRT5 and PRDx1 regulation are pertinent for using it as a food or pharmaceutical material and understanding its therapeutic effect on tumors, including those that are drug-resistant.

• International Journal of Stem Cells
• /
• 제17권1호
• /
• pp.51-58
• /
• 2024

With the activity of intestinal stem cells and continuous turnover, the gut epithelium is one of the most dynamic tissues in animals. Due to its simple yet conserved tissue structure and enteric cell composition as well as advanced genetic and histologic techniques, Drosophila serves as a valuable model system for investigating the regulation of intestinal stem cells. The Drosophila gut epithelium is in constant contact with indigenous microbiota and encounters externally introduced "non-self" substances, including foodborne pathogens. Therefore, in addition to its role in digestion and nutrient absorption, another essential function of the gut epithelium is to control the expansion of microbes while maintaining its structural integrity, necessitating a tissue turnover process involving intestinal stem cell activity. As a result, the microbiome and pathogens serve as important factors in regulating intestinal tissue turnover. In this manuscript, I discuss crucial discoveries revealing the interaction between gut microbes and the host's innate immune system, closely associated with the regulation of intestinal stem cell proliferation and differentiation, ultimately contributing to epithelial homeostasis.

• 한국산학기술학회논문지
• /
• 제16권10호
• /
• pp.6905-6916
• /
• 2015

본 연구는 20세기 이후 급속한 과학기술의 발달로 산업의 공업화 및 인구의 도시화 등으로 인류의 생활터전인 환경이 위협받는 현 시점에, 이슈가 되고 있는 환경문제의 해결방안인 환경규제를 복잡계적 사고로 해석을 한 것이다. 산업혁명이후 출현한 산업의 고도화 과정에서 발생하고 있는 다양한 문제점들을 해결하기 위하여 오래전부터 많은 노력들이 시도되었다. 하지만 이러한 현상을 이해하기 위해서는 단순한 무역수준이나 경제 기술적 수준에서 해석할 수 없는 문제가 제기 되고 있다. 이러한 이슈들에 대해 복잡계적 사고를 통해 기술의 진화에 대한 우발성이 아니라 그들이 만들어낸 차이를 인식하고 혼돈의 가장자리에서 새로운 질서를 창발하는 현상에서 복잡계 시스템을 이해하고 선제적 대응 및 관리에 대한 기술적 혁신을 예측할 수 있는 기반을 제공하고자 한다. 복잡계적 사고로 분석해보면 지구가 처한 환경문제는 혼돈의 가장자리에 자리잡고 있다. 이러한 부분은 공공적인 부분에서 주도를 하고 있지만 이들만의 노력만으로는 해결이 되지 않는 다양한 구성요소들 간의 상호작용을 통한 인과관계를 형성하고 있다. 본 연구는 이러한 상호작용으로 환경규제에 대한 새로운 질서의 창발현상을 설명하고 있으며 환경규제를 공공적인 부분만의 질서가 아니라 민간 혹은 기업에서의 의지와 행동이 임계점에 도달하여 새로운 질서를 창발하는 노력이 필요함을 제시하고자 한다. 따라서 불확실성에 대한 환경규제의 새로운 질서를 이해하려는 기반을 제공하고자 한다.

• 해양환경안전학회지
• /
• 제22권1호
• /
• pp.108-117
• /
• 2016

본 논문에서는 MRV 규제 대응을 위해 선박 운항효율데이터 수집 및 검증 시스템을 구축하고 이를 활용하여 해운선사 업무지원과 국가 온실가스 인벤토리 산정이 가능한 국제해운 에너지효율 포탈 시스템을 설계하였다. 시스템 요구조건을 도출하기 위하여 EU MRV 법안과 IMO MRV 논의사항, 해운선사의 선박에너지효율과 온실가스규제 대응 및 국제해운 온실가스 통계 현황에 대하여 분석하고 선박 에너지효율과 온실가스 배출량 데이터 수집을 위하여 선내 장비, 에너지효율 측정 장비, 운항보고서를 활용한 데이터 수집 모듈과 선박에서 수집된 데이터를 육상으로 전송하기 위해 관리가 용이하고 사용량이 최소화된 데이터베이스기반 전송 모듈을 설계하였다. 수집된 데이터의 표준보고양식 변환, 모니터링, 통계 및 분석, 검증, 보고서 자동생성과 국가 온실가스 인벤토리 지원이 가능한 국제해운 에너지 포탈시스템을 설계하였다.