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사회계정행렬 분석을 통한 도시재생사업의 사회경제적 파급효과 추정
이영성,이중근,박희태,김현수 대한국토·도시계획학회 2019 國土計劃 Vol.54 No.6
This study applied the methodology of SAM model to estimate the impacts of urban regeneration projects. It was shown that the scale of support fund injected into urban regeneration projects and socioeconomic impacts by the projects were not in a proportional relationship. Furthermore, each of the particular projects’ impacts on the industry sectors showed almost no difference among them, but showed differences in their impacts among the age groups of residents. Some of the particular projects’ effects did not only occur in the targeted age groups, but in other age groups as well. For example, the anti-gentrification efforts not only influenced the targeted age group but also all the other age groups except for the teenager group. If urban regeneration projects can be planned considering the estimated indirect influences and benefits altogether, we can expect the maximization of positive effects of those projects.
WLAN 시스템 적용 가능한 무선 USB 동글용 변형된 모노폴 안테나의 설계 및 제작
이영성,문승민,김기래,윤중한,Lee, Yeong-Seong,Mun, Seung-Min,Kim, Gi-Rae,Yoon, Joong-Han 한국정보통신학회 2015 한국정보통신학회논문지 Vol.19 No.10
본 논문에서는 기존의 평면형 모노폴 안테나에서 변형된 구조를 갖는 무선 USB 동글용 내장형 안테나를 제안한다. 제안된 안테나는 기존의 모노폴 구조에 'n' 구조를 결합 한 후 Strip1, Strip2, Strip3를 삽입하여 이중 광대역 특성을 구현하였고, 50-Ω 동축케이블을 이용하여 급전하였다. 안테나는 유전율 4.4인 FR-4 기판 위에 설계되었고 전체 크기는 10 mm(W) × 50 mm(L) × 1mm(t) 이다. 반사손실 측정 결과 -10dB를 기준으로 740 MHz (2.26 ~ 3.0 GHz), 1,200 MHz (5.16 ~ 6.36 GHz)의 이중 공진 특성을 확인하였다. 또한 동작 주파수 대역에서 전방향의 방사패턴을 얻었으며, 2.4 GHz대역에서 최대이득 2.26∼3.81 dBi 그리고 5.5 GHz대역에서 최대이득 2.21∼5.79 dBi의 값을 얻었다. In this paper, we propose a built-in antenna for wireless USB dongle which has a modified structure from the existing planar monopole antenna. The proposed antenna implemented a dual-band characteristic by inserting Strip1, Strip2, Strip3 into the monopole structure combined with 'n' shape and feeded 50-Ω using coaxial cable. The antenna is designed on an FR-4 substrate of which the dielectric constant is 4.6, and its overall size is 10 mm × 50 mm × 1mm. Based on the measurement results of the return loss, it was confirmed to satisfy the dual band resonance characteristics of 740 MHz (2.3 ~ 2.7 GHz) and 1,200 MHz (5.15 ~ 5.825 GHz) by -10 dB. In addition, we obtain the omni-directional radiation pattern measurements in the operating frequency bands, and the maximum gain of the proposed antenna has 2.26~3.81 dBi in the 2.4 GHz band and 2.21~5.79 dBi. in the 5.5 GHz band, respectively.
Does SOC Help Economic Development of Metropolitan Cities and Provinces in South Korea?
이영성,김용욱,김승현 한국지역학회 2014 지역연구 Vol.30 No.3
This study analyzed the causal relationship in South Korea between SOC(Social Overhead Capital) and three economic variables; the gross regional domestic product, private capital and efficiency of private capital, using the time series data of 18 years, from 1994 to 2011. In most metropolitan cities and provinces, the variables were found unstationary implying that there may be a high possibility of spurious regression in the previous literature. Moreover, Granger causality could not be found among the variables in majority of the metropolitan cities and provinces. If the outcome of this study is correct, after the mid 1990s, it seems that demand for SOC was not reflected properly on SOC investment in South Korea. It is also difficult to say that SOC investment contributed to regional economy. Nonetheless, SOC stock increased much faster than other economic variables during the analysis period, which implies SOC in South Korea may be oversupplied.