North Korea Nuclear Scenarios and a Road Map for the Non-nuclear Peace Regime on the Korean Peninsula

( Jun¸ Bong-geun ) 국립외교원 외교안보연구소 2017 IFANS FOCUS (영문) Vol.2017 No.76

Optimized Image Downscaler Using Non-Linear Digital Filter

Bonggeun Lee(이봉근),Honam Lee(이호남),Youngho LEE(이영호),Bongsoon Kang(강봉순) 대한전자공학회 2000 대한전자공학회 학술대회 Vol.2000 No.6

Road Terrain Server를 이용한 제동시스템 시뮬레이션 환경 구축

조봉근(Bonggeun Cho),천세영(Seyoung Cheon),김수상(Soosang Kim),허재웅(Jae Woong Hur) 한국자동차공학회 2019 한국자동차공학회 학술대회 및 전시회 Vol.2019 No.11

Contribution of Greening and High-Albedo Coatings to Improvements in the Thermal Environment in Complex Urban Areas

Song, Bonggeun,Park, Kyunghun Hindawi Limited 2015 Advances in meteorology Vol.2015 No.-

<P>The aim was to identify microclimate characteristics in relation to ground cover in green areas and the reflectivity of building coating materials. Furthermore, microclimate modeling of temperatures was conducted using ENVI-met, to analyze the effects of improved thermal environments based on increased green areas and increased reflectivity of exterior coatings. The accuracy of ENVI-met was validated through comparisons with field temperature measurements. The RMSE deviation of the predicted and actual field temperature values was 3–6°C; however, the explanatory power was as high as 60%. ENVI-met was performed for commercial and single residential areas that have high densities of artificial cover materials, before and after changes related to development of green areas and to increase in the reflectivity of coating materials. The results indicated that both areas exhibited distinct temperature reductions due to the creation of green spaces. When the reflectivity of the coating material was increased, a temperature increase was observed in all land-use types. Therefore, in order to improve the thermal environment of complex urban areas, it is necessary to improve green-area development and to use high-reflectivity ground and building cover materials, while taking into account the spatial characteristics of land-use types and their surrounding areas.</P>

소득분위별 생계비지수와 실질소득분배 추세

김봉근 ( Bonggeun Kim ),정철 ( Chul Chung ),이준원 ( Joun Won Lee ) 한국국제경제학회 2015 국제경제연구 Vol.21 No.1

본 연구는 개방과 무역자유화가 빠르게 진행된 1990년대 이후 우리나라 소득불평등도의 추세를 소득분위별 생계비지수를 고려한 실질소득으로 분석한다. 소득분위별 소비구조 차이를 직접적으로 고려해 소득분위별 수입물가지수 및 소비자물가지수를 도출하였고, 소비자물가 지수 등 통상적인 생계비지수를 보완하는 엥겔곡선에 근거한 소득분위별 생계비지수를 개발하였다. 또한 이들 지수 각각의 소득분위별 물가변화에 근거한 실질소득불평등도의 추세를 비교분석하였다. 진정한 생계비 측정지표로서 여러 한계를 가진 수입물가지수나 소비자물가 지수의 대체변수인 엥겔곡선 생계비지수를 사용하여 분석한 결과, 모든 소득계층에 대해 소비자물가지수의 과도편의가 존재하며 특히 하위 소득계층 지수의 과도편의가 커서 이 계층의 생계비가 상대적으로 덜 증가했음을 발견하였다. 보완된 소득분위별 생계비를 적용한 소득불평등도는 모든 소득계층에 동일하게 적용되는 통상적인 단일 소비자물가지수를 적용한 불평등도보다 다소 낮게 증가했음을 보이고 있다. This study examines the trend of real income inequality in Korea since the 1990s during which trade liberalization has accelerated. We first derive consumer price indices and import price indices that reflect the difference in consumption structure for different income classes. Despite taking costs of living for different income classes into account, real income inequality measured by conventional price indices has worsened during the period. Because of the well-known CPI bias, however, conventional price indices have the problem of overestimation, which might have distorted the income inequality measure. In order to address this bias, we employ the Engel curve methodology to measure the price index more accurately for different income classes in relation to trade liberalization. Results show that real income inequality has exacerbated to a lesser degree compared to the trend using conventional price indices.

Validation of ASTER Surface Temperature Data with<i>In Situ</i>Measurements to Evaluate Heat Islands in Complex Urban Areas

Song, Bonggeun,Park, Kyunghun Hindawi Limited 2014 Advances in meteorology Vol.2014 No.-

<P>This study compared Advanced Spaceborne Thermal Emission Reflection Radiometer (ASTER) surface temperature data with<I>in situ</I>measurements to validate the use of ASTER data for studying heat islands in urban settings with complex spatial characteristics. Eight sites in Changwon, Korea, were selected for analyses. Surface temperature data were extracted from the thermal infrared (TIR) band of ASTER on four dates during the summer and fall of 2012, and corresponding<I>in situ</I>measurements of temperature were also collected. Comparisons showed that ASTER derived temperatures were generally 4.27°C lower than temperatures collected by<I>in situ</I>measurements during the daytime, except on cloudy days. However, ASTER temperatures were higher by 2.23–2.69°C on two dates during the nighttime. Temperature differences between a city park and a paved area were insignificant. Differences between ASTER derived temperatures and onsite measurements are caused by a variety of factors including the application of emissivity values that do not consider the complex spatial characteristics of urban areas. Therefore, to improve the accuracy of surface temperatures extracted from infrared satellite imagery, we propose a revised model whereby temperature data is obtained from ASTER and emissivity values for various land covers are extracted based on<I>in situ</I>measurements.</P>

『營造法式』 축성도구 연구

김봉근(Bonggeun Kim) 한국고고학회 2024 한국고고학보 Vol.- No.130

국내에서 판축용 도구는 『영조법식(營造法式)』의 기록에 근거하여 판축용 목주는 ‘영정주(永定柱)’, 판축용 목판은 ‘박연(膊椽)’, 판축용 목주를 지지·고정하는 횡목은 임목(絍木)으로 여겨져 왔다. 그러나 기존 선행연구의 견해는 축성도구의 용어나 용도, 기능 등 여러 문제점이 확인됨에도 불구하고 어떠한 검토 없이 추정·사용되고 있는 실정이다. 따라서 본고에서는 영정주를 비롯한 『영조법식』에 기록된 축성도구에 대한 기존 해석의 문제점과 재해석을 통해 그 용도와 기능에 대해 살펴보았으며, 나아가 축성도구의 변천 양상에 대한 검토를 진행하였다. 본 연구를 통해 『영조법식』의 축성도구는 기존의 견해와는 달리 각 도구의 명칭은 물론 용도와 기능에 있어서 판축용 도구와의 차이점을 명확히 구분할 수 있었다. 이에 용도와 기능을 명확히 나타내는 용어를 사용하여 『영조법식』의 축성도구와 판축용 도구를 구분하자고 제안하였다. 또한 고고학적 자료와 문헌기록을 통해 『영조법식』의 축성도구는 토축성벽의 안정성과 견고성을 증가시키기 위하여 축성 과정에서 성벽 내부에 목조구조물을 구성하는 고대 축성기술의 하나로 추정하였다. 이러한 『영조법식』에 기록된 축성기술은 고대 축성사에 있어 중국 신석기시대 후기에 이미 태동하였고, 이후 발전을 거듭하였다. 북송(北宋)시대에 이르러 『영조법식』에 기록되면서 공식적으로 제도화되었고, 후대에도 지속적으로 사용되었던 축성기술로 이해된다. The term ‘Yeongjung Pillar (永定柱)’ is used in Korean archaeology to refer to the wooden pillar used to fix wooden blocks when applying the board frame construction method. This use begun in the mid-80s based on the record of Yingzao Fashi (營造法式). However, the record does not correspond with archaeological data in the sense that the wooden pillar used during board frame construction is not equivalent to the Yeongjung Pillar. This paper therefore analyzes the wooden pillar, the ‘Yeongjung Pillar’ of Yingzao Fashi, and other construction materials. In the case of the wooden pillar, the names that were used to refer to it from ancient times, as well as its different forms, were analyzed, in association with construction method and function. To highlight the mistaken interpretation of Yingzao Fashi, the function of the Yeongjung Pillar and other construction materials were examined. These materials were then classified according to various factors. The results of the analysis demonstrate that there are common elements shared between the wooden pillar and the Yeongjung Pillar of the board frame construction method, but differences could also be observed in terms of in size, position during construction, structure, construction or disassembling method, function, and textual records. These results go against the conception that the wooden pillar of the board frame construction method equals the Yeongjung Pillar; the two are clearly different. Finally, the wooden pillar has sometimes been found in the wall, as it was not disassembled after the board frame construction process. In this case, it functioned as the center of the wall or as a Yeongjung Pillar. The functional similarity of the two may be related to the mid-wall column of the wall of dwellings or structures that emerged in the Neolithic Age. The wooden pillar of the board frame construction method may have been derived from the mid-wall column technique. After the Neolithic Age, the wooden pillar that combined the function of the Yeongjung Pillar disappeared, and the two were separated from each other. The Yeongjung Pillar continually developed after its emergence from the midwall column, and it was expansively applied to wall construction. It became institutionalized as the essential civil engineering technology in castle construction with the compilation of the architecture book Yingzao Fashi of the North Song Dynasty.

정책 모기지 상품의 이용이 가구의 경제활동에 미치는 영향 분석

최봉근(Bonggeun Choi),진창하(Changha Jin) 한국주택학회 2020 주택연구 Vol.28 No.3

정책 모기지 상품은 주거 취약계층의 주거안정을 목적으로 정부가 공급하는 모기지 상품이다. 정책 모기지는 시중 모기지에 비해 낮은 이자율 또는 장기간 고정금리 적용 등의 혜택을 제공한다. 본 연구는 정책 모기지 상품을 이용하는 가구가 시중 모기지 상품을 이용하는 가구에 비해 상대적인 모기지 이자율 감소효과가 있는 점에서 착안하여, 정책 모기지상품의 이용이 가구의 경제활동에 미치는 영향을 저축률, 소비율, 주거소비 등 다양한 경로를 통해 살펴보고자 하였다. 정책 모기지는 이용가구들이 선택할 수 있기 때문에 선택편의문제가 존재할 수 있기에 이를 고려하여 성향점수매칭법(PSM)을 이용한 분석을 진행하였다. 분석결과, 정책 모기지 상품의 이용은 가구의 저축률에 음(-)의 영향을, 소비율에 양(+) 의 영향을, 그리고 주거소비를 보기 위해 설정한 총자산 대비 주택자산의 비율에는 양(+)의영향을 미치는 것으로 나타나며 본 연구의 가설과 부합하였다. 이러한 분석결과는, 정책모기지 상품 이용에 따른 모기지 이자율 감소효과가 소비성향을 증가하는 것을 의미하며, 이는 주택구입에 따른 저축 동기의 감소, 정책 모기지 상품 대상가구의 소득 및 소비 수준등 다양한 요인에서 기인하였을 것으로 예상된다. 또한, 정책 모기지 제도의 공급비용과이에 따른 편익을 비교하는 비용-편익 분석에서, 개별 가구에 대한 지원비용에 비해 가구의 편익 증가가 큰 것으로 판단된다. We examine the effects of public mortgage on the behavior of individual household by analysing the interrelationship among the consumption rate, saving rate, and housing consumption. Adopting the 2017 Korean Housing Survey, we attempt to compare the marginal difference of consumption rate and saving rate of two distinct households; a household with public mortgage and one with private mortgage from private banks. In order to overcome the sample selection bias from the availability of the public mortgage since eligibility of public mortgage is not only based on qualification of mortgage but also the availability of public mortgage, we adopt the propensity score matching method to overcome the selection bias of two groups. We find a statistically significant difference between the household with public mortgage and one with private mortgage, a difference that the household with a public mortgage shows a higher the consumption rate and lower saving rate. We conclude that the overall benefit of supplying public mortgage to individual households such as increase of consumption and amount of housing asset exceeds the cost of supplying public mortgage to individual households by lowering mortgage interest rate.

Fitts' law를 이용한 Knob Pointing task 수행도 예측

이봉근 (Bonggeun Lee),명노해(Rohae Myung) 한국HCI학회 2010 한국HCI학회 학술대회 Vol.2010 No.1

기계학습 기반 문장분석을 통한 악의적인 댓글 선별

최봉근(BongGeun Choi),오민규(Min Kyu Oh),설세형(Sehyung Seol),홍정우(JungWoo Hong),정은성(Eun-Sung Jung) 한국정보과학회 2019 한국정보과학회 학술발표논문집 Vol.2019 No.12