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박용성(Yongsung Park),김배수(Baesoo Kim),이정기(Jungki Lee),정혁(Jung Hyuk),권해붕(Haeboong Kwon) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
Research of passenger vehicles are recently progressing about emission factor domestically. However, Medium&Heavy duty vehicles research pertaining to GHG emission factor are not vulnerable. So An objective of this study is to give practical information that could be used for calculating medium&heavy duty vehicles" GHG Emission factors. Development targets of this study are medium&heavy duty vehicles and buses. Also, Emission factors are separated between diesel and CNG. Thus, each six vehicles, totally 12 vehicles are tested. All vehicle emissions are measured with chassis dynamometer and exhaust gas emission analyzer. The emission factor results are elicited from each GHG. NIER modes are used in this test.
우레아 분사량 맵핑을 통한 SCR System의 NOx 저감에 관한 연구
박용성(Yongsung Park),최동석(Dong-Seok Choi),김남용(Namyong Kim),최영태(Youngtae Choi),김용우(Yongwoo Kim),정홍석(HOng-Seok Jung),김성환(Sung-Hwan Kim),조연근(Yunguen Cho),이성호(Seongho Lee) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The characterization of urea-SCR system was performed to develop NOx reduction after-treatment system. Three candidate injectors for injecting urea were tested in terms of the injection rate and NOx reduction rate. The performance of SCR catalytic converter on temperature were investigated. The performance of urea-SCR system was estimated in the NEDC test cycle with and without EGR. It was found that nozzle type injector had high NOx conversion rate. SCR catalytic converter had the highest efficiency at the temperature of 350℃. EGR+urea-SCR system achieved NOx reduction efficiency of 73% through the NEDC test cycle.
도로별 자동차 운행패턴분석을 통한 온실가스 배출계수 검증 연구
박용성(Yongsung Park),최승환(Seunghwan Choi),김배수(Baesoo kim),정애라(Era Jeong),권해붕(Haeboong Kyun) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
Greenhouse Gases and Air pollutions Emission Factor is function of Vehicle Driving speed. This study analyzes the driving pattern of Urban, Rural, Highway road. and compares CO₂ value from field test with CO₂ Emission Factor. The CO₂ Emissions from field test vehicles coincide Emission Factor from Chassis dynamometer Test cell. but according to the effects of driving conditions, air - condition, vehicle weight. the CO₂ Emissions can not coincide Emission Factor.
박용성(Park, Yongsung) 한국동북아학회 2021 한국동북아논총 Vol.26 No.4
본 논문은 종교인과세 정책과정을 사회적 구성주의의 관점에서 분석하였다. 특히, Ingram & Schneider의 사회적 구성에 따른 정책대상 유형을 기반으로 종교인 과세정책이 법률로서 제정·시행되기까지의 정책변동에 미치는 요인들을 살펴보았다. 본 연구를 통해서 정책대상에 대한 사회적 구성은 유동적이며 정책대상의 사회적 인식과 정치적 권력수준에 따라서 정책컨텐츠가 달라지고, 정책의제 설정에 영향을 미치고 있음을 확인하였다. 종교인, 종교단체에 대한 사회적 인식이 긍정적이고 정치적 힘이 클 때는 종교인과세가 정책대상으로서 부정적으로 인식되어 정책의제로 진입에 실패했지만, 정책대상집단에 대한 사회적 인식이 수혜적 정책대상에서 도전적 정책대상으로 전환되는 시기에는 종교인과세가 정책대상으로 긍정적으로 인식되면서 정책의제로 설정되었고 법제화에 성공하였음을 확인하였다. 본 연구는 Ingram & Schneider가 제시한 대상집단을 정책대상으로 확대하여 대상집단 및 정책대상의 사회적 구성의 변화가 정책컨텐츠의 변화를 초래한 것을 확인하였다는 점에서 의의가 있다. This research analyzes the clergy’s income taxation policy process from the point of view of social constructivism. Based on the policy target types according to the social composition of Ingram & Schneider, we examines the factors affecting the policy change until the religious taxation policy was enacted. We find that the social composition of the policy target is flexible, and the policy contents change according to the social perception and political power level of the policy target, and that it affects the setting of the political agenda. When the social awareness of religious people and religious organizations is positive and political power is high, the taxation of religious people is perceived negatively as a policy target. We expanded the target population suggested by Ingram & Schneider to the policy target and confirmed that the change in the social composition of the target group and policy target caused the change in policy content.
전국 다중이용시설의 실내공기 부유 곰팡이의 현황 및 특성 분석
박용성(Yongsung Park),권순현(Soonhyun Kwon),박송이(Song-Yi Park),기선호(Sun-Ho Kee),윤원석(Wonsuck Yoon) 한국환경보건학회 2022 한국환경보건학회지 Vol.48 No.5
Background: Airborne fungi are ubiquitous in the air and exposure to an airborne fungus can be a significant risk factor. The composition of fungi has been potentially important for human health, especially for respiratory diseases like asthma and atopic dermatitis. Therefore, we attempted to ascertain what kind of airborne fungi affect human health at a nationwide level. Objectives: This study was carried out to provide information on indoor fungi distribution at multi-use facilities throughout South Korea. Methods: We classified our data by region and public facility after collection, cultivation, and identification via the sequencing of the ITS (internal transcribed spacer) region. We investigated whether or not the proliferation of HaCaT cells was affected by the identified airborne fungi. Results: In our data, the most isolated airborne fungi by region were Penicillium spp (Seoul, Daegu), Periconia sp (Gyeonggi-do), Iprex sp (Gangwon-do), Phanerochaete sp (Busan), Bjerkandera sp (Gwangju), and Aspergillus sp (Jeju-do). In the public facilities, the most detected fungi were Cladosporium sp (public transport), Penicillium sp (apartment house, retail market, financial institution, karaoke room), Bjerokandera sp (underground parking lot, public toilet, medical institution), Periconia sp (retail store), and Fusarium sp (general restaurant). Next, we selected twenty airborne fungi to examine their cytotoxicity and proliferation of human skin cells. In this experiment, the proliferation of the cells was influenced by most of the identified fungi. In case of the cytotoxicity test, most genera except for Rhodotorula sp and Moesziomyces sp showed cytotoxicity in HaCaT cells. Conclusions: The distribution of mold in the indoor air in multi-use facilities in South Korea differs from region to region, and this is an indicator that should be considered in future health impact studies. In addition, as a result of culturing about 20 types of bacteria dominant in indoor air, it was found that most (90%) inhibit the growth of skin cells, which can be harmful to health. An in-depth study of the health effects of floating fungi is needed.
박용성(Yongsung Park),김남용(Namyong Kim),최동석(Dong-Seok Choi),곽민환(Minhwan Kark),용부중(Boojoong Yong) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This study shows the emission of the CRDI Diesel engine. NOx reduction efficiency of the EGR system is over 30~40% for NEDC test area. CO and HC conversion efficiency is over 98% and 81% by Diesel Oxidation Catalysts(CCC & UCC)
Urea-SCR System의 SV에 다른 NOx 저감에 관한 실험적 연구
박용성(Yongsung Park),김남용(Namyong Kim),최동석(Dong-Seok Choi),정혁(Hyuk Jung),김용우(Yongwoo Kim),정홍석(Hong-Seok Jung),김성환(Sung-Hwan Kim),조연근(Yunguen Cho),이성호(Seongho Lee) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The Effect of Space Velocity(SV) on NOx conversion rate was performed to develop NOx reduction after treatment system. Space Velocity is calculated from engine exhaust gas volume and SCR Catalyst volume. Found the Urea injection Duty of maximum efficiency for NOx conversion If increase Space Velocity, NOx Conversion rate is down. Especially, When space velocity is more than 140,000h?¹, NOx conversion rate decrease suddenly. Same case, If Space velocity is lower than 30,000h?¹ NOx conversion rate is down.