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공간 내 부유한 바이러스에 대한 광촉매 TiO<sub>2</sub>가 코팅된 에어 필터의 항바이러스 효율 평가
박근영,박성재,구현본,김성준,황정호,Park, Geunyoung,Park, Sungjae,Koo, Hyun-Bon,Kim, Seongjun,Hwang, Jungho 한국입자에어로졸학회 2019 Particle and Aerosol Research Vol.15 No.4
Since airborne viruses have been known to aggravate indoor air quality, studies on the development of anti-viral air filter increase recently. In this study, the pressure drop and anti-viral efficiency of TiO<sub>2</sub> coated ceramic ball filter were evaluated. After the filter being inserted into a commercial room air cleaner, chamber test with aerosolized bacteriophage MS2 was performed. The porosity of TiO<sub>2</sub> coated ceramic ball filter was 0.85, and pressure drop was about 13 Pa for 1 m/s of air velocity. The anti-viral efficiency was about 93% when the reaction time was 25 minutes in a 1 ㎥ chamber.
박근영 ( Park Geunyoung ) 아시아문화학술원 2018 인문사회 21 Vol.9 No.2
지방공기업의 규모와 역할의 확대에도 불구하고 부채비율은 계속 증가하고 있어 국가 재정에 부담으로 작용하고 있다. 그동안 지방공기업 성과향상을 위해 지방공기업의 제도 연구, 경영평가지표 개발, 리더십, 조직문화, 임파워먼트 등 성과향상 요인에 대한 연구가 진행되었지만, 괄목할만한 성과향상으로 이어지지 못했다. 이에 본 연구는 실재적인 지방공기업의 성과향상을 위해서는 기존지방공기업의 내부에서 성과를 이끄는 내부조직원들을 대상으로 한 성과요인에 대한 분석과 검토가 필요하다고 보고 선행연구를 중심으로 성과요인을 분석하였다. 해당 연구를 통해 지방공기업의 성과향상을 위해서는 리더십과 조직문화, 임파워먼트 등 내부 조직원들의 행태변화를 이끄는 통합된 성과모형을 제시함으로써 실질적인 성과향상에 기여할 것으로 기대한다. Despite the expansion of the size and role of local public enterprises, the debt ratio continues to increase, which is a burden on national finances. In order to improve the performance of local public corporations, researches on performance improvement factors such as system research of local public enterprises, development of management evaluation index, leadership, organizational culture, and empowerment have been conducted, but this has not led to remarkable improvement of performance. In order to improve the performance of actual local public enterprises, this study analyzed the performance factors of the former local public corporations based on the precedent researches. It is expected that this study will contribute to the substantial improvement of performance by suggesting the integrated performance model that leads to changes in the behavior of the internal organizers such as leadership, organizational culture and empowerment.
[미발표] 장대터널 굴착시 지하수 영향검토를 통한 환경피해 방지 연구
박근영(Geunyoung Park),정철상(Cheulsang Joung),구기욱(Giwuk Koo),임춘대(Choondae Lim) 한국철도학회 2012 한국철도학회 학술발표대회논문집 Vol.2012 No.10
터널굴착공사가 진행되면서 발생하는 지표수량의 감소, 지하수계의 변화에 기인하여 생활용수 및 농업용수의 부족이 발생되는 경우가 많고, 그 원인에 대한 논쟁으로 공사지연이나, 보상 등의 문제점이 자주 발생한다. 본 연구의 목적은 산악터널의 굴착에 기인된 지하수 유동의 영향이 경작이나 생활용수의 부족에 대한 민원을 방지하기 위한 대책방안을 마련하는데 있다. 연구대상 구조물은 태백준령 하부를 통과하는 연장 21.755km의 초장대 철도터널이다. 연구방법으로는 기존문헌자료, 지표지질조사, 시추조사 및 각종 현장시험을 이용한 유선망분석과 기상자료, 정천현황자료 등을 이용한 지하수 유동모델링을 통하여 터널굴착에 따른 지표수 및 지하수계의 영향범위를 예측하고 주변 관정 등에 영향을 미칠 경우 대체 관정 등 민원방지를 위한 시설을 계획하였다. There is a many case that it is occurred the lack of water for living and agricultural use due to reduce in the quantity of surface water and due to changes in the groundwater system by the excavation of the tunnel. Because of the debate about its causes, it is frequently occurred the construction delays or compensation problems. The purpose of this study is to come up with measures to avoid the civil petition which is caused by lack of water for living and agricultural use, the lack of water result from the influence of groundwater flow by excavation of mountain tunnel. Study structures is a super long railway tunnel that passes through the lower of the Taebaek junryeong and 21.755km of extending. The method of study are a flow net analysis and a groundwater flow modeling analysis, the former use the existing documentary data, surface geological survey, drilling surveys and various field test and the latter use the Meteorological data, the list of well and springwater. We have predict the scope of influence of surface water and groundwater system by the tunnel construction, if it has an effect on the surrounding wells, we have planned out facilities (ex. development of replace wells) for avoiding the civil petition.
실내 공간에서의 호흡기 감염병 공기전파감염 위험도와 공기정화장치(필터 임배디드 기계식 환기설비 및 공기청정기 등 실내 감염원 저감 장치) 사용에 따른 효율
박성재,박근영,박대훈,구현본,황정호,Park, Sungjae,Park, Geunyoung,Park, Dae Hoon,Koo, Hyunbon,Hwang, Jungho 한국입자에어로졸학회 2020 Particle and Aerosol Research Vol.16 No.4
Particulate infectious sources, including infectious viruses, can float in the air, causing airborne infections. To prevent indoor airborne infection, dilution control by ventilation and indoor air cleaners are frequently used. In this study, the risk of airborne infection by the operation of these two techniques was evaluated. In case of dilution control by ventilation, a high efficiency air filter was embedded at the inlet of supply air. In this study, infectious source reduction devices such as indoor air cleaner include all kinds of mechanical-filters, UV-photo catalysts and air ionizers through which air flow is forced by fans. Two mathematical models for influenza virus were applied in an infant care room where infants and young children are active, and the risk reduction efficiency was compared. As a result, in the case of individually operating the ventilator or the infectious source reduction device, the airborne infection risk reduction efficiencies were 55.2~61.2% and 53.8~59.9%, respectively. When both facilities were operated, it was found that the risk of airborne infection was reduced about 72.2~76.8%. Therefore, simultaneous operation of ventilation equipment and infectious source reduction device is the most effective method for safe environment that minimizes the risk of airborne infection of respiratory infectious diseases. In the case of a space where sufficient ventilation operation is difficult, it was found that the operation of an infectious source reduction device is important to prevent the spread of infectious diseases. This study is meaningful in that it provides an academic basis for strategies for preventing airborne infection of respiratory infectious diseases.
SMPS와 1단 저압 임팩터를 이용한 대기 중 서브 마이크론 에어로졸 유효 밀도 측정
오재호,한장섭,박근영,황정호,Oh, Jaeho,Han, Jangseop,Park, Geunyoung,Hwang, Jungho 한국입자에어로졸학회 2019 Particle and Aerosol Research Vol.15 No.3
In this study, a serial methodology is presented for estimating the effective density of ambient sub-micron aerosol employing lab-made 1 stage low-pressure impactor of Hyun et al. (2015) and SMPS (Scanning Mobility Particle Sizer) together. The effective density from this methodology (Impactor+SMPS) was compared with another methodology (BAM+SMPS) for estimating the effective density employing BAM (Beta-Attenuation Monitor) and SMPS. As a result, the effective density obtained with impactor+SMPS ranged from $0.42g/cm^3$ to $2.36g/cm^3$, while the effective density obtained with BAM+SMPS ranged from $1.01g/cm^3$ to $1.72g/cm^3$. The difference between these results might be caused by the particle loss in the impactor.
그리드컴퓨팅 환경에서 분산 자원 탐색을 위한 Content-Addressable Network
김석현(Seokhyun Kim),박근영(Geunyoung Park),이상호(Sangho Yi),민홍(Hong Min),이재흥(Jaeheung Lee),조유근(Yookun Cho),홍지만(Jiman Hong) 한국정보과학회 2009 한국정보과학회 학술발표논문집 Vol.36 No.1
인터넷에 연결된 다수의 컴퓨터를 기반으로 하는 그리드컴퓨팅에 관한 다양한 연구가 진행되고 있다. 기존 그리드컴퓨팅은 컴퓨팅 자원을 검색하고 작업을 할당하기 위해 서버를 사용하였다. 그러나 인터넷 기반의 다수의 컴퓨터로 그리드컴퓨팅의 영역이 확장되면서 서버만으로는 확장성(scalability)에 한계를 보이게 되었고, 이 문제의 해결을 위해 peer-to-peer 기술을 활용한 다양한 연구가 진행되었다. 본 논문은 CAN(Content-Addressable Network)을 활용하여 그리드컴퓨팅을 위한 분산 자원 검색을 가능하게 하는 기법을 제시한다. 기존의 연구들은 주로 다중 속성에 대한 범위 검색에 초점이 맞추어져 있으나, 본 논문은 이러한 기존의 연구 성과들을 포괄하면서 컴퓨팅 자원의 동적인 특성을 고려한 기법을 제안한다.
윤성이(Seongyi Yun),장우영(Woo-Young Chang),박근영(Geunyoung Park),임유진(Yoojin Lim),민희(Hee Min) 한국지방행정학회 2017 한국지방행정학보 (KLAR) Vol.14 No.1
Along with the progress of post-industrial society, micro-conflicts surrounding interests, culture, and norms are becoming commonplace in everyday life. Conflicts between individuals and groups are gradually increasing over everyday issues such as the environment, education, transportation, food, housing, health care, women, children and the elderly. We explore the social conflicts that occur in everyday life and try to examine how to deal with them. For this purpose, this study classifies the cases of everyday life conflicts that occurred during the last three years according to the subject and character of the conflict. Then we suggest the mechanism of conflict management by type. A total of 122 cases of everyday life conflicts are classified into intra-group conflicts of norm (A type), normative conflicts between groups (B type), intra-group conflicts of interest (C type), and interest conflicts between groups (D type). Based on this, we select the major case of in each type. In short, this study proposes the good scenario of conflict management by type.