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사회연결망에서의 링크 예측 정확도 향상을 위한 전처리 기법
손승범 ( Seungbeom Son ),최연석 ( Yeonsuk Choi ),강윤석 ( Yoonsuk Kang ),김상욱 ( Sang-wook Kim ) 한국정보처리학회 2020 한국정보처리학회 학술대회논문집 Vol.27 No.2
링크 예측은 주어진 그래프에서 가까운 미래에 발생할 가능성이 높은 새로운 링크를 예측하는 문제이다. 본 논문에서는 유사도 기반 링크 예측의 정확도를 향상시키는 전처리 기법을 제안한다. 제안하는 기법은 유사도 기반으로 예측한 링크들을 그래프에 추가하고, 이 추가된 링크들을 포함하는 그래프를 기반으로 다시 새로운 링크들을 예측하여 추가하는 점진적 추가 방식을 채택한다. 실세계 데이터를 이용한 실험을 통하여, 제안하는 전처리 기법이 기존 링크 예측의 정확도를 향상시킬 수 있는 것을 확인하였다.
미국 공공주택의 진화: 초이스 네이버후드 계획의 생활지원서비스를 중심으로
강승범,Kang, Seungbeom 한국토지주택공사 토지주택연구원 2018 LHI journal of land, housing, and urban affairs Vol.9 No.2
The purpose of this study is to introduce the design and early implementation results of Choice Neighborhoods(Choice) initiative, which is the most recent version of public housing policies in the United States designed and implemented under the Obama administration. The Choice initiative aims to support a wide range of strategies locally driven to address problems in disadvantaged neighborhoods with an emphasis on a comprehensive approach to transforming those neighborhoods. In this study, first, I briefly review the history of public housing policies since 1937, particularly focusing on limitations of HOPE VI(Housing Opportunity for People Everywhere) projects to understand the context behind the advent of the program. Second, I introduce the overall design of the Choice program and point out how this programs' design differs from previous public housing programs by reviewing the literature on federal guidelines for the Choice program. This study particularly focuses on introducing social services given to existing residents in public housing and their neighborhoods in redevelopment processes. These social services are intended to address poverty-related problems that public housing residents often confront, to help them break out of the cycle of poverty, and to minimize the negative impacts of relocation triggered by redevelopment. Third, to examine how this program has been implemented and has revealed limitations so far, I review an interim evaluation report based on five cities. This study ends with discussing policy implications for public housing providers and housing policy-makers in South Korea.
Chanoh Jeon,Soowon Kang,Seungbeom Park,Kyungtaek Lim,Kwang Woo Hwang,Hyeyoung Min 고려인삼학회 2011 Journal of Ginseng Research Vol.35 No.4
Myeloid-derived suppressor cells (MDSCs) actively suppress immune cells and have been considered as an impediment to successful cancer immunotherapy. Many approaches have been made to overcome such immunosuppressive factors and to exert effective anti-tumor effects, but the possibility of using medicinal plants for this purpose has been overlooked. Korean red ginseng (KRG) is widely known to possess a variety of pharmacological properties, including immunoboosting and anti-tumor activities. However, Little has been done to assess the anti-tumor activity of KRG on MDSCs. Therefore, we examined the effects of KRG on MDSCs in tumor-bearing mice and evaluated immunostimulatory and anti-tumor activities of KRG through MDSC modulation. The data show that intraperitoneal administration of KRG compromises MDSC function and induces T cell proliferation and the secretion ofIL-2 and IFN-y, while it does not exhibit direct cytotoxicity on tumor cells and reduced MDSC accumulation. MDSCs isolated from KRG-treated mice also express significantly lower levels of inducible nitric oxide synthase and IL-I 0 accompanied by a decrease in nitric oxide production compared with control. Taken together, the present study demonstrates that KRG enhances T cell function by inhibiting the immunosuppressive activity of MDSCs and suggests that although KRG alone does not exhibit direct anti-tumor effects, the use of KRG together with conventional chemo- or immunotherapy may provide better outcomes to cancer patients through MDSC modulation.
Yoon, Sung-Guk,Kang, Seok-Gu,Jeong, Seungbeom,Nam, Changwon IEEE 2018 IEEE transactions on smart grid Vol.9 No.6
<P>Power line communication (PLC) has been selected by ISO/IEC 15118 as standard technology for vehicle-to-grid communication. Communication traffic to charge an electric vehicle should have a higher priority than normal traffic in order to improve the reliability and delay performance. To this end, HomePlug Green PHY, which is a standard PLC defined in ISO/IEC 15118, provides such a priority resolution scheme. However, when there is a hidden station with respect to the high-priority station, the priority resolution scheme does not operate properly, resulting in a higher delay or losses of high-priority traffic. This paper briefly analyzes the priority inversion probability under the hidden station problem and proposes a priority inversion prevention scheme. The adverse effect of the priority inversion problem is demonstrated through a numerical analysis and extensive simulations. We also show that our proposed scheme not only solves the problem but also improves the performance of the other stations.</P>