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- 저자 : 정성훈 ( Sung Hoon Jung ) (검색결과 307 건)
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정성훈,Jung, Sung-Hoon 한국정보처리학회 2010 정보처리학회논문지B Vol.17 No.2
유전자알고리즘의 조숙수렴현상(premature convergence phenomenon)은 유전자알고리즘의 성능을 크게 저하시키기 때문에 이 문제를 해결하는 것이 성능향상에 크게 영향을 준다. 본 논문에서는 유전자알고리즘의 조숙수렴현상을 완화하여 성능을 향상시키기 위한 선택적 돌연변이 방법을 제안한다. 선택적 돌연변이에서는 유전자알고리즘 개체의 등급에 따라서 염색체의 특정영역에 비트를 추가적으로 돌연변이 시킨다. 이렇게 함으로서 등급이 낮은 개체는 표현형 상에서 많은 변화가 일어나고 등급이 높은 개체는 작은 변화가 일어나게 된다. 결국 좋은 개체는 그 주변을 세부적으로 탐색하며 좋지 못한 개체는 새로운 영역을 탐색할 기회가 높아지게 되어 조숙수렴현상을 완화하면서 성능향상을 꾀할 수 있게 된다. 성능향상을 측정하기 위하여 4개의 대표적 함수 최적화 문제에 적용해서 제안한 방법의 성능을 측정하였다. 실험결과 기존의 유전자알고리즘보다 성능이 크게 향상됨을 확인하였다. Since the premature convergence phenomenon of genetic algorithms (GAs) degrades the performances of GAs significantly, solving this problem provides a lot of effects to the performances of GAs. In this paper, we propose a selective mutation method in order to improve the performances of GAs by alleviating this phenomenon. In the selective mutation, individuals are additionally mutated at the specific region according to their ranks. From this selective mutation, individuals with low ranks are changed a lot and those with high ranks are changed small in the phenotype. Finally, some good individuals search around them in detail and the other individuals have more chances to search new areas. This results in enhancing the performances of GAs through alleviating of the premature convergence phenomenon. We measured the performances of our method with four typical function optimization problems. It was found from experiments that our proposed method considerably improved the performances of GAs.
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매립지 온실 가스 배출량 산정을 위한 IPCC 선정방법별 특성 연구
정성훈,황현욱,김명균,엔짜오쩡,느지오카 안토니 무투아,티네가 조셉 냐모코,김영주,Jung, Sung Hoon,Hwang, Hyeon Uk,Kim, Myung Gyun,Yan, Cao Zheng,Nzioka, Antony Mutua,Tinega, Joseph Nyamoko,Kim, Young Ju 한국자원리싸이클링학회 2016 자원리싸이클링 Vol.25 No.5
The purpose of this study was to estimate greenhouse gas emissions using IPCC 1996 Guideline Tier 1, Good Practice Guidance 2000 Tier 2 and IPCC 2006 Guideline First Order Decay methods from landfill disposal facility. In addition, a comparative analysis evaluating the pros and cons of each method based on assumptions and default factors was considered for each method. The greenhouse gas emission computed using IPCC 1996 Guideline Tier 1 method (2,760 ton/yr) was higher than the estimation of GPG 2000 Tier 2 and IPCC 2006 Guideline First Order Decay Model which showed 1500 and 880 ton/yr respectively between 2000 and 2013.
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동측 반맹을 호소하는 후두엽-두정엽 뇌출혈 환자에 대한 복합 한의치험 1례
정성훈,배인후,김근영,조기호,문상관,권승원,이한결,정우상,Seong Hoon, Jeong,In Hu, Bae,Geun Young, Kim,Ki-Ho, Cho,Sang-Kwan, Moon,Seungwon, Kwon,Han-Kyul, Lee,Woo-Sang, Jung 대한중풍순환신경학회 2022 대한중풍.순환신경학회지 Vol.23 No.1
■Background Overall prevalence of visual field loss after stroke was estimated at 31%, ranged from 5.5- 57%. Among them, homonymous hemianopia is the most common symptom of post-stroke visual field loss and leads to a decrease in the quality of life and therapeutic effect. However, standard treatment has not been established. ■Case report A 48-year-old male with right side homonymous hemianopia by a left occipital-parietal lobe hemorrhage was treated with Qu-Ji-Du-Huang-Wan, acupuncture and electroacupuncture for 20 days. We used confrontation visual field exam, automated perimetry and visual analog scale for evaluating symptoms. Following treatment, confrontation visual field exam and the subjective discomfort was improved. ■Conclusions The present case report suggests that combined Korean medicine treatment might be an effective treatment of post-stroke homonymous hemianopia. A number of follow up studies should be conducted to clarify the effectiveness of treatment.
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Pseudo MOSFET 기술에 의한 양성자 조사 SOl 웨이퍼의 캐리어 수명 분석
정성훈,이용현,이재성,권영규,배영호,Jung, Sung-Hoon,Lee, Yong-Hyun,Lee, Jae-Sung,Kwon, Young-Kyu,Bae, Young-Ho 한국전기전자재료학회 2009 전기전자재료학회논문지 Vol.22 No.9
Protons are irradiated into SOl wafers under total dose of 100 krad, 500 krad, 1 Mrad and 2 Mrad to analyze the irradiation effect. The electrical properties are analyzed by pseudo MOSFET technology after proton irradiation. The wafers are annealed to stabilize generated defects in a nitrogen atmosphere at $300^{\circ}C$ for 1 hour because proton irradiation induces a lot of unstable defects in the surface silicon film. Both negative and positive turn-on voltages are shifted to negative direction after the irradiation. The more proton total dose, the more turn on voltage shifts. It means that positive oxide trap charge is generated in the buried oxide(BOX). The minority carrier lifetime which is analyzed by the drain current transient characteristics decreases with the increase of proton total dose. The proton irradiation makes crystal defects in the silicon film, and consequently, the crystal defects reduce the carrier lifetime and mobility. As these results, it can be concluded that pseudo MOSFET is a useful technology for the analysis of irradiated SOI wafer.
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거리경제의 경제지리 -서울시 강남터미널 지하상가를 사례로-
정성훈 ( Jung¸ Sung-hoon ) 한국사진지리학회 2021 한국사진지리학회지 Vol.31 No.3
The aim of this article is to explore some issues on the change of the economy of a street in the context of economic geography by taking a case study of the underground shopping center in Kangnam terminal. Since 2000 such center has experienced various changes with respect to the governance of the management, the competition with large-scaled department stores, rebuilding or remodelling the exist facility, to name but a few. Economic geographical characteristics of the center are deeply related to the locational inertia. It is deeply related to cognitive thickness by consumers throughout the place image of the center, the convention for the sustainable coherence of the stores’ community, and the wide hinterland at the national and regional level.
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정성훈(Sung Hoon Jung) 경인교육대학교 기전문화연구소 2024 기전문화연구 Vol.45 No.1
이 글은 생활도시의 마을자치라는 관점에서 인천의 마을공동체 사례를 다룬다. 생활도시의 관점이란 신뢰의 공동체와 확신의 행정을 뚜렷이 구별하는것이며, 마을자치의 관점이란 제도화된 단체자치와 주민자치보다 실질적인마을공동체의 자치가 중요하다고 보는 것이다. 이 글은 인천의 마을공동체중에서도 특히 높은 자립성을 달성하고 주민자치회에도 적극 참여하고 있는부평구 삼산동의 영성마을 사례를 집중적으로 다룬다. 그리고 영성마을 공동체가 성장하는 데 인천마을공동체만들기지원센터가 기여한 지점도 살펴본다. 필자는 이러한 사례 연구를 기초로 생활도시의 마을자치에 대한 응원 방향으로 다음과 같은 네 가지를 제안한다. 첫째, 행정의 성과나 효율보다 신뢰의공동체 형성을 우선시하는 응원의 관점을 취해야 한다. 둘째, 공모사업 방식의 일회적 사업비 지원보다 정기적인 혹은 일시적 거액의 마을기금을 지원하는 것이 좋다. 셋째, 행정 혹은 중간지원조직의 핵심적인 과제는 교육과 네트워크 형성을 통해 마을 자치의 역량을 키우는 것이다. 넷째, 제도적 주민자치는 신뢰에 기초한 자발적 결사체인 마을공동체의 자치로 대체되어야 한다. This article discusses the case of Incheon communities from the perspective of life city that distinguishes between the community of trust and the administration of confidence, and reveals the importance of practical community’s autonomy. In particular, I focus on the case of Yeongsung Community in Bupyeong-gu, which is self-reliant and actively participates in the residents’ autonomy. As a rusult, I propose four directions for supporting community’s autonomy in life city. (1) The formation of a community of trust should be prioritized over administrative performance and efficiency. (2) It is better to support regular or temporary large-scale community funds rather than one-time project expenses in the form of a public project. (3) A key task for administrative or support centers is to build the capacity of community’s self-governance through training and networking. (4) Institutional residents’ autonomy should be replaced by a voluntary association based on trust.
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