고등학교의 남녀공학 여부가 대입수능에 미치는 영향

김범수,김가영,Kim, Beomsoo,Kim, Ga-young 한국개발연구원 2015 KDI Journal of Economic Policy (KDI JEP) Vol.37 No.-

Park et al.(2012)은 서울의 학군 내 고등학교 무작위 배정정책을 이용하여 특정 학생이 남녀공학에 배정될지 남(여)학교에 배정되는지에 따라 대학수학능력시험에서 학생들의 성적이 어떠한 영향을 받는지를 확인하고자 하였다. 하지만 이 논문은 학군 내 무작위 배정이 아닌 대중교통을 이용하여 30분 이내 학교들 중에서만 무작위 배정이 이루어졌다는 중요한 현실을 고려하고 있지 않으므로 본 논문에서는 각각의 남녀공학과 가장 가까운 남(여)학교 두 곳을 찾아서 이 학교들과의 성적의 차이만을 찾음으로써 보다 정확한 남녀공학과 비교한 남(여)학교의 효과를 측정하고자 하였다. 또한 Park et al.(2012)에서는 한 해 연도의 자료만을 사용하였지만 본 논문에서는 다년도의 자료를 이용하여 결과가 안정적인지도 확인하였다. 이러한 보다 정확한 분석의 결과, 남녀 모두 단성학교가 공학에 비해 통계적으로 유의하게 성적이 향상되는 결과를 보이고 있다. 이 결과를 Park et al.(2012)과 비교하면 여학생의 경우에는 단성학교의 효과가 Park et al.(2012)보다 작고, 남학생의 경우에는 Park et al.(2012)보다 큰 것으로 확인되었다. Park et al. (2012) examined the impacts of coeducation in high school on the college scholastic ability test using random assignment in Seoul high schools. However, the student random assignment in Seoul within a school district was performed only within 30 min commutable areas using public transportation and Park et al. (2012) did not aware of this rule. This paper reexamines the question by matching nearest two single sex schools with a coeducation school within a school district. We found single sex school students achieve higher test score than that of coeducation school for both male and female. The magnitude of test score improvement for female is smaller than that of Park et al. (2012). However, the magnitude for male is bigger than that of Park et al. (2012).

금연법 강화가 흡연에 미치는 영향

김범수,김아람,Kim, Beomsoo,Kim, Ahram 한국개발연구원 2009 韓國 開發 硏究 Vol.31 No.2

국내외적으로 간접흡연이나 환경 속 담배연기가 미칠 수 있는 해악에 대한 관심이 고조되고 있으며, 그 결과 작업공간 내 금연정책이 점차 늘어나고 있다. 한국에서도 작업공간 내 금연정책이 2003년 국민건강증진법 개정으로 훨씬 강화되었다. 본 논문에서는 2001년과 2005년에 이루어진 국민건강영양조사를 이용하여 강화된 금연정책이 흡연율과 일평균 흡연 개비 수에 미친 영향을 분석하고자 한다. 금연법강화가 실내 작업공간 위주로 이루어진 점에 착안하여 법 개정의 영향을 많이 받은 실내근무자 직업군과 영향을 비교적 덜 받는 실외근무자 직업군을 비교하였다. 추정 결과, 금연법 강화로 95% 수준에서 유의하게 흡연율은 4.1%p 감소하였고, 흡연자 중 일평균 흡연 개비는 2.5개비 줄어든 것으로 나타났다. There is a growing concern about potential harmful effect of second-hand or environmental tobacco smoking. As a result, smoking bans in workplace become more prevalent worldwide. In Korea, workplace smoking ban policy become more restrictive in 2003 when National health enhancing law was amended. The new law requires all office buildings larger than 3,000 square meters (multi-purpose buildings larger than 2,000 square meters) should be smoke free. Therefore, a lot of indoor office became non smoking area. Previous studies in other counties often found contradicting answers for the effects of workplace smoking ban on smoking behavior. In addition, there was no study in Korea yet that examines the causal impacts of smoking ban on smoking behavior. The situation in Korea might be different from other countries. Using 2001 and 2005 Korea National Health and Nutrition surveys which are representative for population in Korea we try to examine the impacts of law change on current smoker and cigarettes smoked per day. The amended law impacted the whole country at the same time and there was a declining trend in smoking rate even before the legislation update. So, the challenge here is to tease out the true impact only. We compare indoor working occupations which are constrained by the law change with outdoor working occupations which are less impacted. Since the data has been collected before (2001) and after (2005) the law change for treated (indoor working occupations) and control (outdoor working occupations) groups we will use difference in difference method. We restrict our sample to working age (between 20 and 65) since these are the relevant population by the workplace smoking ban policy. We also restrict the sample to indoor occupations (executive or administrative and administrative support) and outdoor occupations (sales and low skilled worker) after dropping unemployed and someone working for military since it is not clear whether these occupations are treated group or control group. This classification was supported when we examined the answers for workplace smoking ban policy existing only in 2005 survey. Sixty eight percent of indoor occupations reported having an office smoking ban policy compared to forty percent of outdoor occupation answering workplace smoking ban policy. The estimated impacts on current smoker are 4.1 percentage point decline and cigarettes per day show statistically significant decline of 2.5 cigarettes per day. Taking into account consumption of average sixteen cigarettes per day among smokers it is sixteen percent decline in smoking rate which is substantial. We tested robustness using the same sample across two surveys and also using tobit model. Our results are robust against both concerns. It is possible that our measure of treated and control group have measurement error which will lead to attenuation bias. However, we are finding statistically significant impacts which might be a lower bound of the true estimates. The magnitude of our finding is not much different from previous finding of significant impacts. For cigarettes per day previous estimates varied from 1.37 to 3.9 and for current smoker it showed between 1%p and 7.8%p.

온라인 정치 커뮤니케이션과 플랫폼효과: 부산광역시 홈페이지 사례

김범수 ( Beomsoo Kim ),박근영 ( Keun Young Park ) 서울대학교 한국정치연구소 2016 韓國 政治 硏究 Vol.25 No.1

본 연구는 소통 구조인 플랫폼효과에 주목하여 전자정부 플랫폼과 전자거버넌스 플랫폼에 따른 커뮤니케이션 차이를 분석하였다. 전자정부 플랫폼은 시민이 말하고 정부가 듣는 1:1 소통구조이기 때문에 정부가 소통을 통제하고 시민의 공론적 참여가 제한을 받는다. 반면에 전자거버넌스 플랫폼은 시민 다수가 말하고 듣는 다수:다수 소통구조로서 공론화 가능성이 높다. 이러한 가설을 부산시 홈페이지중 "부산시에 바란다"와 "정책포럼"의 글들을 비교 분석하여 검증하였다. "정책포럼"에 게시된 글들의 공개비율은 68%였고, "부산시에 바란다"의 경우에는 52%였다. 또한, 공론장 수준에서 "정책포럼"에 게시된 글들이 "부산시에 바란다"의 글들보다 글의 논리성, 관계성, 그리고 공론으로서의 수렴 가능성이 높았다. 시민들은 전자거버넌스 플랫폼에서 좀 더 공개적이고 논리적이며, 서로를 존중하며, 공론으로 수렴하는 글들을 더 많이 작성하였다. 이러한 결과는 전자민주주의를 실현하는데 있어서 인터넷 소통구조인 플랫폼이 갖는 중요성을 알려준다. 정부와 시민 사이의 정치 소통은 시민의 행위와 함께 정부가 어떤 플랫폼을 설계하고 운영하는가에 영향을 받는다. The factors that affect the Internet political participation are classified into the two; one related to agency and the other to structure. By comparing the e-government platform and the e-governance platform, this study exclusively focuses on "Platform Effect," one of the structural factors of the Internet political participation, which has long been neglected by many scholars. On E-government platform, because of its unique one to one structure that the government listens to what citizens say, the government tends to control the entire communications and citizens have restrictions in participating in public sphere. On E-governance platform, by contrast, it is more likely that citizens successfully develop the public sphere since multiple numbers of citizens talk to and listen to each other simultaneously. These Platform hypotheses have been applied to two online participation platforms in Busan City Homepage. The results show that the proportion of publicly opened opinion postings on e-governance platform, "Jeong-Chaek Forum" is greater than that on e-government platform, "Busan-si-e-ba-ran-da" by 68% to 52%. As for the degree to which the public sphere has been developed, if evaluated by opinions posted on these two platforms, e-governance platform is higher than e-government platform in dimensions of logic, relationship, and compromise. The results of this study suggest that communicative platform is important in realizing the e-democracy. In particular, the role of e-governance platform is so crucial for e-democracy that it should be considered as important as citizen`s choices. In conclusion, if a government intends to drive citizen` vigorous participation in public sphere, it should design e-governance platform.

자동변속기 기반의 병렬형 하이브리드 시스템의 구조에 따른 연비 및 동력성능 해석

김범수(Beomsoo Kim),오창은(Chang eun Oh),박영일(Youngil Park),차석원(Suk-Won Cha) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

There have been efforts to enhance the efficiency of conventional automatic transmission vehicles. HEV will be able to decrease exhaust gas and the amount used of oil through epochal fuel economy improvement. But, there are yet several problems such as high price, complex structure, difficulty of control. In this research, structures and components are emphasized as factor of influence on performance of HEV. This research is advanced on parallel hybrid electric vehicles. According to the existence of torque converter, performance such as acceleration, fuel economy and dynamic characteristics like transient torque are compared through simulations. Based on the result of research, the more detailed structure and capacity of components will be arranged.

Does Real-Time Navigation Affect Traffic Efficiency?

김범수(Beomsoo Kim) 고려대학교 미래성장연구소 2021 미래성장연구 Vol.7 No.2

A considerable number of people use real-time navigation through smartphone applications. In this study, we analyze the effects of real-time navigation on the speed of vehicles. As data on the number of real-time navigation users on the road is unavailable, we have used the number of smartphone users as a proxy. We focus on two parallel highways built on the north and the south sides of the Han river in Seoul; these highways are connected by some bridges and drivers have an option to switch to another highway with the help of real-time navigation if they can travel faster. We found that an increase in real-time navigation users decreases the speed gap between the two highways. This improvement was more significant during off-peak hours and when a switch option between the highways was available.

IGS 정밀궤도력을 사용한 GPS 방송궤도력 Fitting 알고리즘 검증

김범수(Beomsoo Kim),박세림(Serim Bak),부성춘(Sung-Chun Bu),이철수(Chul-Soo Lee) 한국항공우주학회 2023 한국항공우주학회 학술발표회 논문집 Vol.2023 No.6

록업 클러치의 완전 직결에 의한 연비 및 동특성 분석

김범수(Beomsoo Kim),정원빈(Wonbin Jung),임원식(Wonsik Lim),차석원(Suk-Won Cha),안성훈(Sung-Hoon Ahn),김현철(Hyun-Chul Kim),장재덕(JaeDuk Jang) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2007 No.11

k-means 클러스터링을 이용한 강판의 부식 이미지 모니터링

김범수(Beomsoo Kim),권재성(Jaesung Kwon),최성웅(Sungwoong Choi),노정필(Jungpil Noh),이경황(Kyunghwang Lee),양정현(Jeonghyeon Yang) 한국표면공학회 2021 한국표면공학회지 Vol.54 No.5

Corrosion of steel plate is common phenomenon which results in the gradual destruction caused by a wide variety of environments. Corrosion monitoring is the tracking of the degradation progress for a long period of time. Corrosion on steel plate appears as a discoloration and any irregularities on the surface. In this study, we developed a quantitative evaluation method of the rust formed on steel plate by using k-means clustering from the corroded area in a given image. The k-means clustering for automated corrosion detection was based on the GrabCut segmentation and Gaussian mixture model(GMM). Image color of the corroded surface at cut-edge area was analyzed quantitatively based on HSV(Hue, Saturation, Value) color space.

네트워크사회의 변동요인과 포스트대의제의 등장

김범수(Beomsoo Kim),조화순(Whasun Jho) 한국사회이론학회 2017 사회이론 Vol.- No.52

본 연구는 전통적인 대의제의 위기와 한계 속에서 네트워크 사회에 조응하는 새로운 정치 제도로 포스트 대의제(postrepresentative system)의 등장 배경과 동인, 그리고 구성방향을 논구한다. 전통적인 대의제는 정치엘리트와 대중사이에 수직적인 정치관계를 근본 원리로 하였다. 네트워크 사회에서는 정보의 디지털화, 세계화 그리고 개인화와 인터넷을 이용한 소셜미디어의 이용으로 정부와 시민의 관계가 더욱 수평적으로 변화하였고, 쌍방향적인 소통으로 시민들은 정책에 관해 토론하고 성찰하는 새로운 대의제 시스템을 필요로 한다. 시민들은 자신의 이해와 요구가 대표자에 의해 대표될 수 있다는 대의제의 기본 가정을 신뢰하지 않으며, 여론형성과정과 정책 결정과정에 직접 참여한다. 시민은 상시적이고 대규모로 정치과정에 직접 참여하는 제도를 기대하며, 바로 여기에서 진정한 민주주의를 원한다. 인터넷 망은 이러한 수평적이고 성찰적인 소통의 비용을 낮추어 새로운 대의제를 실현시키는 기술적 동인이다. 시민의 참여성, 숙의성, 투명성과 책임성이라는 네 가지 제도설계 원리를 내재한 포스트 대의제는 전통적인 대의제의 한계를 극복하는 새로운 정치제도이다. This study researches on the backdrops and directions of the postrepresentative system which corresponds to the rise of a network society. The current traditional representative system, based on the hierarchical relations between political elites and mass, has been showing limitations in may aspects. In the network society, the relationship between the government and the citizen have been changing into a more horizontal form with the advance of digitalization, personalization of information, and the use of social media. Citizens aspire regular and large-scale direct participation in the political process, and want real democracy. The internet and social media is a technological driver that lowers the cost of such horizontal and reflective communication and brings about a new representative structure. The post-representative system, which has four institutional design principles, citizen participation, deliberation, transparency and accountability, may be evolving into one that overcomes the limitations of traditional representations.

영상분할법을 이용한 강판상의 부식 감지

김범수(Beomsoo Kim),김연원(Yeonwon Kim),양정현(Jeonghyeon Yang) 한국표면공학회 2021 한국표면공학회지 Vol.54 No.2

The visual inspection method is widely used for corrosion damage analysis of steel plate due to the cost-efficient, fast and reasonably accurate results. However, visual inspection of corrosion deteriorated degree has a problem that the reliability of results differs depending on the inspector’s individual knowledge and experience. In this study, we evaluated the degree of corrosion from a given image by using image segmentation method based on the grabcut and HSV(Hue, Saturation, Value) color image processing techniques for the development of an automatic inspection tool. The code written in Python based OpenCV-python libraries was used to categorize the images.