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정용호(Yong-Ho Jung),안병욱(Byung-Wook Ahn) 한국생활환경학회 2003 한국생활환경학회지 Vol.10 No.1
Air conditioning systems are indispensable in modem buildings. Therefore air conditioning systems play a main role in improving indoor air quality. However, there is not enough information about air duct contamination and any official maintenance standards or guidelines, for air duct maintenance does not exist in Korea. In this study, dust concentration and microorganisms between the upstream and the downstream of air filters and air duct were measured with particle counter and blood agar plates. Before and after duct cleaning out and after 45 days above items were measured at 4 points in each floor of building under actual operating conditions. As for the results, air duct contamination strongly influence on the indoor air quality. So proper maintenance of air duct should be carried out in the building. The aims of this study are proposal for air filter maintenance methods after installation and basic data about air duct maintenance guidelines or standards for operator.
정용호(Yong-Ho Chung) 호서대학교 공업기술연구소 2020 공업기술연구 논문집 Vol.39 No.2
바이오센서 분야는 생체물질의 신호를 금속 전극을 통해 측정하여, 질병 마커의 검출이나, 환경 신호의 측정, 신호의 전자소자에의 응용 등을 주로 다루고 있다. 생체신호는 신호의 강도가 낮고, 외부 환경 변화에 따른 신호 편차로 인해 정밀한 측정이 어려워, 이를 개선하기 위해 다양한 연구들이 진행되고 있다. 구조적으로 불안정하고, 나노 수준의 크기를 갖는 생체물질의 신호를 측정하기 위해 금속 전극을 나노 수준으로 가공한 나노 구조체를 제작 및 활용하려는 다양한 연구가 있었으며, 본 연구에서는 특히 나노패터닝 기술을 활용한 전극 제작과 관련한 다양한 기술 및 연구결과를 소개하고, 향후 연구 방향에 대한 전망을 제시하고자 한다. The field of biosensors have mainly focused on the detection of disease markers, measurement of environmental signals, and application of signals to electronic devices by measuring signals of biological materials through metal electrodes. Bio-signals have low signal strength and, are difficult to accurately measure due to signal deviations according to the changes in external environments so that various studies have been conducted to improve them. There have been various studies to fabricate and utilize nanostructures processed with nano-level metal electrodes to measure signals of biological materials that are structurally unstable and have nano-level sizes. In this study, in particular, various technologies and research results related to electrode fabrication using nanopatterning technology are introduced, and prospects for future research directions are presented.
합성환경 표현의 효율성을 고려한 SEDRIS 기하 모델 단순화 연구
정용호(Yong H. Chung),함원경(Won K. Hwam),안의국(Eui K. An),박상철(Sang C. Park),권용진(Yongjin(James) Kwon) (사)한국CDE학회 2012 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2012 No.2
본 논문에서는 SEDRIS 데이터를 이용한 분산 합성 환경 표현의 효율성을 높이기 위하여 SEDRIS 내의 기하 모델을 단순화하는 프로세스를 제안하였다. 불필요한 메모리 사용을 줄임으로써 더욱 효율적으로 합성 환경을 표현할 수 있다. 제안하는 프로세스는 다음과 같다 : 1) SEDRIS 내의 기하 모델로부터 폴리곤에 대한 정보를 불러온다. 폴리곤이 삼각형이면 점 데이터를 그대로 가져오고, 점이 4 개 이상의 다각형이라면 삼각화 과정을 거친 후 점 데이터를 가져온다. 2) 폴리곤들의 점 데이터를 기반으로 위상 관계를 가지는 삼각망을 생성한다. 3) 그 후 QEM 을 적용하여 단순화를 실시한다. 본 논문의 한계점은 EDCS 에 대한 매핑 작업은 고려되지 않았다는 점이다. 다음 단계의 연구에서는 STF 내에 담긴 EDCS 에 대한 정보를 단순화 과정을 거친 STF 에 적용하는 연구를 진행할 것이다. As battlefields are expanded and complex, military has researched research related with interoperation between independent systems. There is HLA/RTI(High Level Architecture/Run-Time Infrastructure), which is typical technique. By using HLA/RTI specification, each system can easily interoperate with other HLA-compliant systems. But, there is the exchange problem of synthetic environment data. SEDRIS, which is a synthetic environment data representation and interchange specification, is developed to solve this problem. To represent large scale synthetic environment, geometry models in SEDRIS can be used in many times. Therefore geometry model have to be simplified to reduce computational cost. This paper propose process to simplify the geometry model in SEDRIS to reduce computational cost.
정용호 ( Yong Ho Chung ) 대한내과학회 1969 대한내과학회지 Vol.12 No.4
From January, 1965 to June, 1968, clinical observation was done for 129 cases of bronchiectasis, visited our department and pediatrics of Chonnam University Hospital. 1. The male-female ratio was 2: 1, and 2nd decade age group showed the highest incidence
정용호(Yong-Ho Jung),박성룡(Seong-Ryong Park) 대한설비공학회 2015 설비공학 논문집 Vol.27 No.12
The summer climate is very hot and humid in Korea. Humidity is an important factor in determining thermal comfort. Recently, research on dehumidification device development has been attempted to save the energy required for operating the dehumidifier. Existing dehumidification systems have disadvantages such as wasting energy to drive the compressor. Meanwhile, dehumidification systems with membranes can dehumidify humid air without increasing the dry bulb temperature. Therefore. they don’t have to consume cooling energy. In this paper, the installation conditions for a membrane system were analyzed to improve the shape and optimum performance of the system. The results showed that the distance between elements was the critical system design factor, and that a distance of 20 mm was the optimal condition for the pressure drop and flow characteristics of the internal air flow.