유전자알고리즘의 성능향상을 위한 선택적 돌연변이

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.

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 資源 리싸이클링 Vol.25 No.5

본 연구에서는 매립 처리시설를 대상으로 1996 IPCC G/L에 제시된 Tier 1 방법과 GPG 2000의 Tier 2 방법, 2006 IPCC G/L의 Tier 2 방법을 이용하여 매립시설에서 발생되는 온실가스 배출량을 산정하였으며 각 방법론 별로 적용상의 장단점 및 배출결과에 영향을 주는 요인과 산정된 배출량의 특성을 고찰하였다. 온실가스 배출량을 산정한 결과 1996 IPCC G/L Tier 1의 배출량은 2000 ~ 2013년 기간 동안 평균 약 2,760 ton/yr로 산정되었고, GPG 2000 Tier 2의 배출량은 평균 약 1,500 ton/yr, 2006 IPCC G/L Tier 2의 배출량은 평균 약 880ton/yr로 가장 낮게 산정되었다. 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.

잣나무 인공림의 흉고직경 등급별 생장변화에 관한 연구

정성훈,서영완,이대성,최정기,Jung, Sunghoon,Seo, Yeongwan,Lee, Daesung,Choi, Jungkee 한국산림과학회 2022 한국산림과학회지 Vol.111 No.1

본 연구는 장기 모니터링 자료를 이용하여 우리나라 잣나무 인공림의 흉고직경, 수고, 흉고단면적, 재적, 바이오매스 생장변화를 파악하기 위해 수행되었다. 또한, 인자별 입목의 상대적 크기에 따른 생장을 비교하여 향후 인공림의 경급별 생산·수확을 위한 기초자료를 제공하고자 하였다. 이를 위해 흉고직경 기준 20%씩 총 5개의 등급인 I등급(1~20%, 상위 20%), II등급(21~40%), III등급(41~60%), IV등급(61~80%), V등급(81~100%, 하위 20%) 및 전체등급(0~100%)으로 구분하여 등급별 생장특성을 비교분석하였다. 본 연구에서는 39년간 9회 조사된 자료를 이용하여 총생장과 연평균생장량이 산출되었으며, 입목평균을 이용한 개체목 특성과 단위면적 ha당 산출값을 이용한 임분 특성이 분석되었다. 인자별 총생장 분석 결과, 흉고직경, 흉고단면적, 재적, 바이오매스는 시간이 경과할수록 등급 간 총생장의 차이가 증가하였으나, 수고생장의 차이는 지속적으로 증가하지 않았다. 연평균생장량 분석결과, 평균흉고직경의 I등급 최대값은 23년생 때 0.92 cm·yr^-1로 관측되었으며, 전체등급의 최대값은 17년생 때 0.69 cm·yr^-1로 파악되었다. 평균수고의 I등급 연평균생장량은 23년생 때 0.52 m·yr^-1로 최대였으며, 전체등급의 최대값은 20년생 때 0.49 m·yr^-1로 파악되었다. 개체목 및 임분 단위의 흉고단면적, 재적, 바이오매스의 경우, 본 조사기간인 46년생까지 I등급과 전체등급의 연평균생장량 최대값은 관측되지 않았다. 따라서 해당 인자들의 연평균생장량 최대값을 파악하기 위해서는 보다 장기간의 모니터링이 요구된다. In this study, growth changes of the diameter at breast height (DBH), height, basal area, volume, and biomass of Korean white pine (Pinus koraiensis Siebold & Zucc.) on a plantation were examined via long-term monitoring. In addition, this study was performed to provide the basic data for timber production in line with DBH class by comparing the growth of the relative DBH size. Growth characteristics according to DBH class were analyzed by categorizing trees into five classes based on sorted DBH rankings: class I (1%-20%; upper 20%), class II (21%-40%), class III (41%-60%), class IV (61%-80%), class V (81%-100%; lower 20%). A total class (0%-100%) was also used. Total increment and mean annual increment (MAI) were calculated using data from nine measurements taken over 39 years. Tree characteristics based on average values and stand characteristics based on unit area per hectare were examined. According to the total increments of variables, the differences in DBH, basal area, volume, and biomass among classes I-V increased over time, whereas the height difference did not continually increase. According to MAI, the maximum DBH value was 0.92 cm·yr^-1 at age 23 in class I, whereas the maximum value in all trees was 0.69 cm·yr^-1 at age 17. The maximum value of height MAI for class I was 0.52 m·yr^-1 at age 23, whereas that for all trees was 0.49 m·yr^-1 at age 20. In terms of basal area, volume, and biomass growth at tree-and stand-level, the maximum MAI of class I and all trees was not observed during the measurement period. Therefore, additional long-term monitoring data are required to determine the maximum MAI of the variables.

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.

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.

진동계측자료 기반 안전성평가 시스템을 활용한 건축물의 비틀림 분석 방법 개발

정성훈,장원석,이정한,박병철,Jeong, Seong-Hoon,Jang, Won-Seok,Lee, Jung-Han,Park, Byung-Cheol 한국지진공학회 2021 한국지진공학회논문집 Vol.25 No.6

In this study, algorithms for analyzing the torsion of buildings under earthquake excitation are developed. The algorithm and formulations to account for the torsional angle are verified by analyzing the seismic acceleration time history data. The method was applied to the reference buildings to examine their operation and usability. The reference application demonstrated that the noise-canceling scheme successfully overcame various obstacles in the field measurements. The developed method is expected to be used as a tool to support a loss assessment system for determining the direction and priority of disaster response in the event of an earthquake.

스타트업의 디자인 개발을 위한 패스트 피드백 프로토타이핑 방법연구

정성훈 ( Jung Sung-hoon ),윤진영 ( Yoon Jin-young ),이윤숙 ( Lee Youn-suk ),조성은 ( Cho Seong-eun ),류창완 ( Ryoo Chang-wan ) 커뮤니케이션디자인학회 2017 커뮤니케이션 디자인학연구 Vol.58 No.-

근래 한국경제의 최우선 과제인 스타트업 활성화는 창업 초기의 실패확률을 줄이고 기창업 성공률을 높이는 것이 무엇보다 중요하다. 이를 위해서는 스타트업들이 참고할 수 있는 방법과 가이드라인이 요구되어지며, 그것의 한 방편으로 `스타트업을 위한 디자인 개발 방법`에 대한 체계적인 연구가 필요하다. 이에 본 연구에서는 스타트업에 최적화된 프로토타이핑 방법론이 무엇이고, 이를 어떻게 활용할 수 있는지 가이드라인을 제시하였으며, 그 과정에서 고려해야 할 상황과 발생할 수 있는 문제점 등을 자세히 살펴보고자 하였다. 본 연구는 초기 창업기업의 제품개발에 적용 가능한 실행 전략뿐만 아니라 스타트업 과정의 이론과 실습을 가르치는 교육자, 그리고 스타트업에 멘토링을 제공하는 전문가들에게 효과적인 프레임웍이 될 수 있는 방법과 적용 프로세스의 기초연구로써 그 의의를 가진다. Recent top priority of Korean economy, Reducing Failure probability and increasing the success rate of activation of startup is more important than any others in activation of business startup. To do this, procedures and guide lines are required for Startups, in one way or another, systematic Study for Design development method is needed. In this study, we suggest the methodology of prototyping to optimized to Starup and considerations and possible issues during the process. This study is intended to provide a framework that can be an effective to educators who teach the theory and practice of start-up process and experts who provide mentoring for start-up, as well as implementation strategies applicable to product development of early start-up companies. And it has a significance as a basic study of applicable process.

항공 통신 기술 분야 : 해상환경에서 IEEE 802.16e의 RSSI 및 CINR 측정 분석

정성훈 ( Sung Hun Jung ),김병찬 ( Byung Chan Kim ),양규식 ( Gyu Sik Yang ) 韓國航行學會 2009 韓國航行學會論文誌 Vol.13 No.6

지역 산업클러스터 형성을 위한 제도적 역량 구축의 가능성과 한계: 춘천시 IT산업을 사례로

정성훈 ( Sung Hoon Jung ),황인균 ( In Kyun Hwang ) 한국경제지리학회 2010 한국경제지리학회지 Vol.13 No.4

The aim of this paper is to explore opportunities and limitations of the top-down approach to build institutional performance by analyzing the process of local government-led cluster`s initiatives. In doing so, this paper investigates processes of the design and implementation of cluster`s policy as well as firms` innovative capacities. As the result, it reveals the fallacy of the local government`s policy in planning industrial clusters, the inconsistence of cluster initiatives due to changes of regional vision providers, weakness of innovative performance of IT firms supported by the local government in the region. It should be concluded that Chun-cheon City did not succeed in accumulating institutional capabilities which were crucial to implement a cluster initiative.

산학연관 협력네트워크를 활용한 강원도의 POSCO 유치 전략

정성훈 ( Sung Hoon Jung ),김석중 ( Seok Jung Kim ),김인중 ( In Chung Kim ),김경환 ( Kyuong Hwan Kim ) 한국경제지리학회 2010 한국경제지리학회지 Vol.13 No.4

The main aim of this paper is to explore a strategy for the attraction of POSCO into Gangwon province through the collaborative network of industry-University institute-government. Although Gangwon province has abundant resources, the industrial development is stagnant owing to unfavorable conditions of industrial location. However, while attracting an magnesium smelting factory of POSCO into Gangneung city, the industrial development in the province faces a new phase for the industrialization in the region. Successful factors of the attraction are as follows; firstly, mutual collaborations of local government, research institutes, region-based firms; secondly, trust throughout rational proposals which are focused upon mutual regard of local government, POSCO and research institutes; thirdly, stategies for the attraction of POSCO which are based upon thorough analysis on such firm; finally, securing the demand market of forward industries.