통근비용절감을 통한 서울근교도시 거주자의 주택구입능력 개선효과

최정우,백성준,이종훈,Choi, Jung-Woo,Baek, Sung-Joon,Lee, Jong-Hoon 한국주거학회 2012 한국주거학회 논문집 Vol.23 No.5

This study has analyzed the effect of the housing affordability improvement of the residents in the metropolitan areas, applying Transit Supportive Home Loan (TSHL) which extends the loan amount according to the transportation cost saving based on Location Efficiency Mortgage (LEM) System in the USA. The previous studies focused on introducing LEM system to Korea, whereas this study has analyzed TSHL effect for the first time, taking into account the situation in Korea. For analysis, The Transportation Savings (TS) is calculated and Housing Affordability Index (HAI) is drawn by applying increased TS and DTI (Debt to Income), so the improvements of housing purchasing ability is examined by HAI's improvement. As a result, transit commute 1 (having own car) and transit commute 2 (without having own cars) respectively produce the TS of monthly average 36 thousand won and 110 thousand won in comparison with car using commute. Each additional loan (TSHL) amounts to 16.57 million won and 54.07 million won. As the distance is farther and the house price cheaper, the improvement of HAI is more outstanding. City hall area showed the highest improvements of HAI by 9.3% (transit commute 1) and 21.9% (transit commute 2) increase, in comparison with car using commute.

탄산칼슘 분말을 충진시킨 열가소성 탄성체 복합재의 제조 및 차음 특성

최정우,황연,Choi, Jung-Woo,Hwang, Yeon 한국재료학회 2010 한국재료학회지 Vol.20 No.9

Composites of ceramic powders and an elastomer-based matrix were prepared by mixing $CaCO_3$ powders with polyethylene and polypropylene elastomers, and their mechanical and sound insulation properties were measured. $CaCO_3$ powders with 0.7 ${\mu}m$ and 35 ${\mu}m$ particle size were added to elastomers up to 80 wt%. Scanning electron microscopy photographs showed uniform distribution of the $CaCO_3$ powders in the matrix. While density and surface hardness increased, melt index, tensile strength and elongation of the composites decreased as the amount of added $CaCO_3$ powders increased. As more $CaCO_3$ powders were added sound transmission loss of the composites increased owing to the increase of density. Addition of 0.7 ${\mu}m$ sized $CaCO_3$ powders resulted in a slightly higher transmission loss than the addition of 35 ${\mu}m$ sized powders because of the increased interface area between the elastomer matrix and the $CaCO_3$ powders. Composites with a polyethylene matrix showed higher transmission loss than those with a polypropylene matrix because the tensile strength and hardness of the polyethylene-based composites were low and their elongation was high.

뇌졸중 후 양안의 동측 상방 수평반맹을 호소하는 환자 한의 치험 1례

최정우,김서영,김하리,신희연,양승보,조승연,박성욱,고창남,박정미,Choi, Jeong-Woo,Kim, Seo-Young,Kim, Ha-Ri,Shin, Hee-Yeon,Yang, Seung-Bo,Cho, Seung-Yeon,Park, Seong-Uk,Ko, Chang-Nam,Park, Jung-Mi 대한중풍순환신경학회 2019 대한중풍.순환신경학회지 Vol.20 No.1

■ Objectives The purpose is to report the case of Korean medicine in the treatment of bilateral superior altitudinal hemianopia after a stroke. ■ Methods The patient was treated with acupuncture, electroacupuncture, bee venom, and herbal medicine. The visual field defect was assessed using humphrey visual field analyzer and confrontation visual field test. ■ Results After treatment, humphrey visual field analyzer and confrontation visual field test showed improvement in field of vision ■ Conclusion This study suggested that Korean medical treatment could be an effective option for treating visual field defect after stroke.

보행장애를 호소하는 초기 다계통 위축증(MSA-C) 환자 한의 치험 1례

최정우,김서영,김하리,전규리,조승연,박성욱,박정미,고창남,Choi, Jeong-Woo,Kim, Seo-Young,Kim, Ha-Ri,Jeon, Gyu-Ri,Cho, Seung-Yeon,Park, Seong-Uk,Park, Jung-Mi,Ko, Chang-Nam 대한중풍순환신경학회 2020 대한중풍.순환신경학회지 Vol.21 No.1

■ Objectives The purpose of this case is to report the effectiveness of Korean medicine in the treatment of early stage multiple system atrophy-cerebellar ataxia(MSA-C) ■ Methods The patient was treated with acupuncture, bee venom, and herbal medicine. The clinical symptoms was assessed using unified multiple system atrophy rating scale(UMSARS) and 20M gait time and steps. ■ Results After treatment, UMSARS score and 20M gait time and steps showed improvement. ■ Conclusion This study suggested that Korean medical treatment could be an effective option for treating early stage MSA-C.

약물 중단에도 지속되는 약인성 파킨슨증후군 환자의 한의 치험 1례

최정우,김서영,전규리,황예채,조승연,박정미,고창남,박성욱,Choi, Jeong-woo,Kim, Seo-young,Jun, Gyu-ri,Hwang, Ye-chae,Cho, Seung-yeon,Park, Jung-mi,Ko, Chang-nam,Park, Seong-uk 대한한방내과학회 2021 大韓韓方內科學會誌 Vol.42 No.6

This study examined the effectiveness of Korean medical treatment in a patient with persistent drug-induced parkinsonism after drug discontinuation. The changes in symptoms were assessed using the unified parkinson's disease rating scale (UPDRS), postural instability-gait disturbance (PIGD) score, and the 20 m gait time and steps. After 22 days of hospitalization, the UPDRS, PIGD score, and 20 m gait time and steps showed clinically significant improvement. The improvement persisted after discharge. This study indicated that Korean medical treatment could be an effective alternative therapy for treating persistent drug-induced parkinsonism after drug discontinuation.

음향 대조 및 밝기 제어

최정우(Jung-Woo Choi),김양한(Yang-Hann Kim) 한국소음진동공학회 2012 한국소음진동공학회 학술대회논문집 Vol.2012 No.4

본 논문에서는 공간상의 서로 다른 영역에 소리를 집중하거나 파면의 전파 형상을 제어 가능케 하는 음향 밝기 및 대조 제어의 기초 이론을 서로 다른 제한 조건의 관점에서 살펴보았다. 밝기 및 대조 제어는 소형 모바일 기기에서 DTV, 항공기 실내 등 다양한 분야에서 활발히 연구되고 있으며, 향후 홈 환경과 같이 음향반사가 심한 공간에서도 사적이고 쾌적한 음향청취 공간을 제공하는데 활용될 수 있다. Acoustic brightness and contrast control are promising techniques for manipulating acoustic energy over selected zones of interest using loudspeaker arrays. In this paper, the fundamental theory and concept of the brightness and contrast control is reviewed. The similarity and difference of two different strategies are explained in terms of the constraint required to determine a unique solution among many possible candidates. The application examples and recent progresses of the brightness and contrast control are presented.

정치적 영향력이 특별교부세 배분에 미치는 영향에 관한 연구: 국회 안전행정위원회와 지방자치단체장 특성을 중심으로

최정우 ( Jung-woo Choi ),강국진 ( Kuk-jin Kang ),배수호 ( Suho Bae ) 서울대학교 한국행정연구소 2016 行政論叢 Vol.54 No.4

특별교부세 배분과정에서의 정치적 영향력에 대한 선행연구는 제한된 자료 활용과 분석방법의 한계가 존재한다. 특히 2009년부터 특별교부세의 투명성과 절차적 합리성이 강화되면서 특별교부세 배분과정에서 나타나는 정치적 영향력을 재검토할 필요성이 높아지게 되었다. 이 연구는 2007년부터 2013년까지 특별교부세 배분 내역을 대상으로 특별교부세 배분에서 가장 중요한 요인으로 평가받는 국회 안전행정위원회 소속 여부와 지방자치단체장의 여당 소속 여부를 중심으로 정치적 영향력을 검증하였다. 분석결과에 따르면, 지역구 국회의원의 안전행정위원회 소속 여부와 자치단체장의 여당 소속 여부만으로는 특별교부세 배분에 유의미한 증액이 나타나지 않았다. 이러한 결과는 특별교부세 배분에 대한 정치적 영향력이 기존 연구에 비해 낮아졌고, 보다 합리적인 배분이 이루어지고 있음을 의미할 수 있다. The influence of political power on the allocation of Special Revenue Sharing (SRS) has been analyzed by previous studies over years but some limitations still exist for generalizing those findings. Thus, further research needs to be conducted for better understanding of the effects of political factors on SRS allocation, because Korean government has strengthened procedural rationality and transparency in SRS allocation since 2009. This paper examines the effects of political power on the allocation of SRS, using the panel data covering 2007 to 2013. Especially, it pays more attentions to the characteristics of mayors in local jurisdictions and the Security & Public Administration Committee in National Assembly, which have been recognized as crucial factors in previous research. According to empirical results, the political power of the committee and mayors does not statistically affect SRS allocation among local jurisdictions. Consequently, our findings imply that SRS might be distributed on more rational basis than on political basis.

고정화된 이온성 액체에 의한 바이오매스의 5-히드록시메틸푸르푸랄로의 효율적인 화학적 변환

최정우 ( Jung Woo Choi ),이윤식 ( Yoon Sik Lee ),조진구 ( Jin Ku Cho ),윤효진 ( Hyo Jin Yoon ) 한국공업화학회 2010 응용화학 Vol.14 No.1

Utilizing renewable biomass is becoming important part of strategy to lower the total emissions of CO2. Abundant biomass resources can be transformed into sustainable valuable chemical intermediates for the production of plastics, fine chemicals, and fuels. 5-hydroxymethylfurfural (5-HMF) has already been considered as one of the valuable platform chemical intermediates. Herein, we prepared various types of ionic liquids (ILs) immobilized polymer catalysts for dehydration of fructose to 5-HMF. Ionic liquids have not only attracted as environment-friendly reaction medium, but also contributed efficient catalytic performance by combination of various anions and cations. Among the ionic liquid catalysts investigated, sulfonate functionalized butylimidazolium immobilized polymer catalyst showed the best catalytic activity and gave good yield of product.

지방자치단체의 R&D 투자 유사･중복이 사업 생산성에 미치는 영향에 대한 연구

최정우(Jung Woo Choi),신유호(Yoo Ho Shin) 한국지방행정학회 2021 한국지방행정학보 (KLAR) Vol.18 No.1

R&D분야에서의 유사･중복은 전반적인 성과를 제거하고 비효율을 야기하는 요인으로 지적받았고 이를 개선하기 위해 많은 정책적 노력을 기울이고 있다. 하지만 가외성에 주목하는 연구들은 일정 조건을 확보하면 사업의 유사･중복성은 사업 추진의 안정성을 확보하고 사업별 리스크를 보완하여 총체적인 효과성을 제고한다고 주장한다. 이에 본 연구는 지방 R&D 투자의 사업집중도를 중심으로 지역별 유사․중복사업의 추진과 사업성과 간 관계를 분석하였다. 2007년부터 2018년까지의 국가연구개발사업을 대상으로 분석한 결과에 따르면 유사･중복수준이 높은 연구분야의 연구성과가 통계적으로 유의한 수준에서 높게 나타났으며, 유사･중복이 낮은 연구영역 대비 생산성 또한 낮지 않은 것으로 나타났다. 따라서 공공부문에서의 복잡성에 따른 가외성이 불가피한 요소라면 이를 최대한 효과적으로 관리하기 위한 다양한 방안들을 강구하여 유사･중복에 따른 비효율을 방지하는 것이 중요하다고 판단된다. Similarity and redundancy in the R&D field have drawn attention as factors getting rid of overall performances and causing inefficiency, and many policy efforts are made to improve this. And yet, studies paying attention to redundancy argues that the similarity and redundancy of business promote the overall effectiveness, securing the stability of business promotion and supplementing risks by the business if certain conditions are secured. Thus, this study analyzed the relationship between the promotion of similar businesses and business performances by region, centering around the business concentration of regional R&D investment. According to the result of an analysis of the national R&D program from 2007 through 2018, research performances were high at a statistically significant level in the research areas with high levels of similarity and redundancy, and productivity was not low compared to research areas with low similarity and redundancy. Thus, if redundancy according to complexity in the public sector is an inevitable element, it is judged that it would be important to prevent inefficiency according to similarity and redundancy, devising various measures for effectively managing that as much as possible.

메시지 트래픽 절감을 위한 HeartBeat 메시지 전송 주기 연구

최정우(Jung Woo Choi),최훈(Hoon Choi) 한국통신학회 2016 한국통신학회 학술대회논문집 Vol.2016 No.6