The Effect of the National Basic Livelihood Security System Reform on Labor Supply and Income Growth

( Bongha Shin ) 한국보건사회연구원 2018 한국복지패널 학술대회 논문집 Vol.11 No.-

This project studies the labor supply and income growth effects of the National Basic Livelihood Security System reform in South Korea. In 2015, Korean government redesigned the major social security system to alleviate the problem of potential dependence on welfare and limited coverage by diversifying the type of allowance (from the integrate allowance to the customized allowances) and selection criteria. Using Korean Welfare Panel Survey for 2010-2016, I investigate the impact of the reform on labor supply and income growth by employing difference-in-differences estimation. The evidence suggests that the reform has significantly decreased labor supply by 6.9 percentage points, for the old group aged 41-65, whereas the result is not significant for the young group aged 19-40. However, the reform positively affects the income growth of the low-income individuals, although the result is significant only for the younger group. This finding provides an important policy implication for the direction of effective social security reform, which needs to be customized further to reflect heterogeneous characteristics of the potential and incumbent beneficiaries and facilitate work incentives based on such consideration.

냉각 공기 유동 최적화를 통한 공력 성능 향상에 관한 수치적 연구

송봉하(Bongha Song),이규익(Kyuik Lee),하종백(Jongpaek Ha) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11

These days, the fuel economy of road vehicles is getting important all over the world due to the several reasons such as the depletion of fossil fuel, high fuel cost, and stringent regulation of toxic exhaust gas from conventional internal engine combustion. Therefore, all auto makers have been requested to develop a vehicle with high fuel efficiency as a demand of times. In this view point, aerodynamics is well known as a big potential which can contribute considerably to solve these demands from customers. Total drag of road vehicle is mainly composed of three parts, exterior skin effect from upper body, underbody effect, and engine room’s flow recirculation effect driven by engine cooling air flow. Especially, drag increment from engine cooling air flow needs to be minimized for better aerodynamic performance through the optimization of front-end styling. However, P/T cooling performance has also to be considered carefully because there is a trade-off relationship between aerodynamics and engine cooling performance. In this research, the drag impact on cooling air flow was studied using CFD analysis. Aerodynamics friendly cooling air flow system is completed by the optimization of front grille inlet opening, cooling air outlet, and CRFM sealing, which is represented by baffle and gap seal. The analysis results showed that grille inlet opening could be closed by reducing the leakage of cooling air flow from grille inlet to heat exchanger. Finally, the closing of noneffective grille inlet opening driven by the optimization of CRFM sealing using baffle and gap seal gave us dramatic aerodynamic saving effect, and therefore it will help the fuel economy. The size of cooling air outlet also showed that the bigger the size, the better the aerodynamic performance.

Engine cooling airflow의 공기 저항에 관한 수치적 연구

송봉하(Bongha Song),이규익(Kyuik Lee),하종백(Jonpaek Ha) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5

These days, the fuel economy of road vehicles is getting important all over the world due to the several reasons such as the depletion of fossil fuel, high fuel cost, and stringent regulation of toxic exhaust gas from conventional internal engine combustion. Therefore, all auto makers are requested to develop a vehicle with high fuel efficiency as a demand of times. In this view point, aerodynamics can contribute considerably to solve these demands from customers. Total drag of road vehicle is mainly composed of three parts, exterior skin effect from upper body, underbody effect, and cooling drag. Especially, drag increment from engine cooling airflow need to be minimized for better aerodynamic and powertrain cooling performances through the optimization of front-end styling. Aerodynamics friendly front-end styling is completed by the grille inlet opening and CRFM sealing which are represented by baffle and gap seal. In this research, the drag impact on cooling airflow is studied using CFD analysis. The analysis results showed that grille inlet opening can be closed by reducing the cooling air leakage from grille inlet airflow to heat exchanger. Finally, the closing of non-effective opening are through the optimization of CRFM sealing using baffle and gap seal gave us dramatic aerodynamic saving effect, and therefore it helps the fuel economy.

Barrier effect of dendrons on TiO₂ particles in dye sensitized solar cells

Shin, Bongha,Won, Jongok,Son, Taewook,Kang, Yong Soo,Kim, Chan Kyung Royal Society of Chemistry 2011 Chemical communications Vol.47 No.6

<P>The short circuit current of dye sensitised solar cells increased significantly by the simple addition of polyester hydroxyl acetylene bis(hydroxymethyl)propanoic acid dendrons on TiO<SUB>2</SUB> nanoparticles, resulting in a very high overall energy conversion efficiency.</P> <P>Graphic Abstract</P><P>The short circuit current of DSSCs increased significantly by the simple addition of dendrons on TiO<SUB>2</SUB> nanoparticles, resulting in a very high overall energy conversion efficiency. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c0cc03851b'> </P>

신재생에너지 기술수준 분석 및 국제협력 추진전략

최봉하(Choi, Bongha),이성곤(Lee, Seonggon),홍성준(Hong, Seongjun),구기관(Koo, Kikwan),이덕기(Lee, Deokki),박수억(Park, Su-Uk) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.06

우리나라의 신재생에너지 기술개발은 2008년 '저탄소 녹색성장' 국가 비전 선포 이후 국가 에너지 R&D 전략의 중심에 자리 잡고 있다. 이미 우리의 경쟁 대상인 선진국들은 신재생에너지 기술을 중심축으로 녹색산업을 신성장 동력으로 활용하고자 국력을 집중하고 있다. 우리나라는 선진국과 비교할 때 상대적으로 신재생에너지 기술개발 후발자이다. 기술적 핸디캡을 극복하고 대등한 경쟁에 뛰어들기 위해서는 신재생에너지 기술보유 선진국과의 국제협력을 통한 시너지효과 창출이 필요하다. 이는 최고수준의 국가 및 기관들과 협력을 도모함으로써 기술개발 기간 단축은 물론 조기 기술격차 해소가 가능하기 때문이다. 이러한 국가간 상호협력을 위해서는 무엇보다 기술 분야별 선진국 수준과 우리의 수준에 대한 객관적인 분석이 필요하다. 이를 위해 주요 신재생에너지 기술들을 대상으로 심층적인 전문가 조사를 통해 전세계 주요 국가 및 관련 업체들의 기술수준 및 협력 선호 유형을 분석하였다. 이에 더해 관련 기술 시장 상황을 고려하여 기술별 국제 협력 추진 전략을 시장주도형 모델과 공동연구형 모델로 나누어 수립하였다. 수립된 전략을 바탕으로 신재생에너지 기술 국제협력 활성화를 위한 정책 추진 방향을 제시하였다.

전기자동차 냉방 시스템의 운전 조건이 Driving Range에 미치는 영향에 대한 연구

권지원(Jiwon Kwon),송봉하(Bongha Song),김용석(Yongsuk Kim) 한국자동차공학회 2015 한국자동차공학회 부문종합 학술대회 Vol.2015 No.5

연비향상을 위해 최적화된 opening을 이용한 aerodynamic front end styling

이규익(Kyuik Lee),송봉하(Bongha Song),하종백(Jonpaek Ha),이태원(Taewon Lee) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5

As the environmental disruption caused by the vehicle is emerged, new vehicles with high fuel efficiency are needed. To improve fuel efficiency, vehicles have certainly the low aerodynamic drag coefficient. This paper is mainly purposed to reduce aerodynamic drag coefficient using the optimized opening for fuel efficiency front end styling by using CFD analysis. There are two ways to reduce aerodynamic drag coefficient in this paper. First one is to lower air leakage from front opening to CRFM module. Second one is to have the optimized opening. As a result, this paper showed that aerodynamic drag coefficient was reduced by lowering leakage and front opening. Also engine cooling performance was increased with aero-friendly styling.

CFD analysis를 이용한 Fuel filling pipe-line 설계

이규익(Kyuik Lee),송봉하(Bongha Song),하종백(Jonpaek Ha) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11

When filling the gas tank, the gas dispenser is shut off long before the tank is filled. It’s called PSO(Premature Shut-Off). Generally, this problem occurs when the filler pipe from the nozzle to the gas tank fills up with fuel and operates a sensor located on the pump nozzle. A sharp bend in the pipe causes the fuel rushing into the inlet to accumulate at the top of the pipe rather than move directly into the gas tank. When the fuel swirls around in the pipe, it creates a blockage, causing fluid to back up in the filler pipe. The nozzle of the fuel pump has a sensor that turns the pump off as soon as it is surrounded by liquid. This simulations are for the fuel to travel from the fuel inlet to the gas tank while avoiding obstacles along the way. This paper is mainly purposed to avoid this phenomenon through the optimized pipe design by using CFD analysis. As a result, the simulations indicate that CFD can be successfully utilized as a tool to shorten the design, development and cost reduction cycle of a nozzle, filler pipe, canister, and tank system.

香薷散의 效能에 關한 實驗的 硏究

金珍成(Jinseong Kim),柳逢夏(Bongha Ryu),朴東源(Dongwon Park),柳基遠(Kiwon Ryu) 대한한의학회 1994 대한한의학회지 Vol.15 No.1

그린에너지기술 국제협력을 위한 대외협력 맵 구축

구기관(Koo, Kikwan),최봉하(Choi, Bongha),홍성준(Hong, Seongjun),이성곤(Lee, Seongkon),이덕기(Lee, Deokki),박수억(Park, Sueok) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.06

기후변화, 석유자원 고갈 우려 등으로 인하여 그린에너지기술 개발에 대한 중요성은 크게 증가하고 있다. 그 가운데, 글로벌화된 경쟁구도 확대와 급속한 기술개발 속도로 인하여 국가간 또는 기업간 기술 개발 경쟁은 더욱 심해지고 있다. 이러한 상황하에서 그린에너지기술 개발을 위한 국제협력의 중요성은 더욱 증가하고 있다. 이에 각 국은 제도적, 경제적 지원을 통한 그린에너지기술 개발 및 국제협력을 적극 지원하고 있다. 그러나 우리나라의 경우 에너지기술 관련 R&D 예산 중 국제공동연구 비중은 0.6%로 선진국에 비해 지원 규모가 부족한 실정이며, 그린에너지기술 국제협력을 위한 기초 정보 역시 부족한 상황이다. 따라서 본 연구에서는 그린에너지기술 분야의 국외 선도 업체 및 기관을 대상으로 기술수준 및 협력의향을 조사하여 대외협력 맵을 구축하였다. 우선 '그린에너지 전략로드맵'상의 15대 기술 분류에서 상세 분석을 위한 주요 에너지기술을 선정하고 기술별 하위 전략품목별로 현황 조사를 실시하였다. 국내 전문가를 대상으로 1차, 2차 설문을 통하여 국제협력 추천 업체 및 기관, 기술수준을 조사하였으며, 조사된 국외 추천 선도 업체 및 기관을 대상으로 설문을 통하여 협력의향과 협력유형을 조사하였다. 조사된 자료를 통해 기술수준과 협력의향을 기준으로 4가지 유형으로 분류하여 대외협력 맵을 구성하고 구축된 대외협력 맵을 통해 국제협력 추진을 위한 시사점을 도출하였다.