국부적 향상을 이용한 복합 유전자 알고리즘 : GA + 셀룰러 학습 GA + Cellular Learning

고명숙,김주연 부천대학 2001 論文集 Vol.22 No.-

진화 이론에 의하면 진화 과정 중 모집단에 속하는 가장 적합한 개체들만이 그 다음 세대에도 생존할 수 있으며 각 개체는 생명 주기 동안에 적응 능력을 학습하며 그 유전적 형질들이 다음 세대에도 보존됨을 알 수 있다. 또한 생명 주기동안에 학습된 특질들은 그 다음 세대에서 다시 학습할 필요가 없다. 이러한 경험 획득 과정을 학습(learning)이라 부르며 일반적으로 유전자 알고리즘에서는 국부 탐색(local search)을 통하여 학습이 이루어진다. 유전자 알고리즘은 복잡한 상태 공간상에서 최적의 해를 찾기 위해 유향성 임의 탐색을 행하는 전통적인 최적화 알고리즘이다. 이 논문에서는 함수 최적화를 위해 학습 속도를 개선한 셀롤러 학습을 기반으로 하는 유전자 알고리즘을 제안한다. 복합 유전자 알고리즘은 기존의 유전자 알고리즘과 국부 탐색 기법을 혼합시킴으로써 최적해로의 수렴률을 향상시킨 방법이다. 제안하는 셀롤러 학습 전략은 셀롤러 오토마타의 주기성과 수렴성을 기반으로 한다. 유기체가 그 개체의 생명 주기의 한 세대에서 얻게되는 지식과 경험들을 자손에게 전달한다는 이론을 바탕으로 한다. 분석적인 실험을 통하여 제한한 학습 전략이 기존의 방법보다 더 빨리 전역 최적 해를 찾을 수 있음을 증명하였다. 셀롤러 학습을 이용한 복합 유전자 알고리즘은 전역 최적해로의 수렴 속도를 향상시킨 최적화 알고리즘이다. According to evolutionary theories, only the most suited individuals in a population are likely to survive and individuals learn to adapt significantly during their lifetime, and thus transmitting their biologocal heredity to new generations. Genetic Algorithms are traditional optimization techniques using directed random searches to locate optimal solutions in complex landscapes. This paper proposes a genetic algorithm based Cellular Learning with accelerated learning capability for function optimization. A Hybrid genetic algorithm combines local search with a more traditional genetic algorithm and it can be improved in convergent to optimum. Proposed Cellular Learning strategy is based on periodic and convergent behaviors in cellular automata, and on the theory of transmitting to offspring the knowledge and experience that organisms acquire in their lifetime. We demonstrated through analytical experiments that the proposed cellular learning strategy could find the global opyimum faster than conventional learning strategies. The hybrid genetic algorithm based on cellular learning is an optimization algorithm that is capable of accelerating convergence speed to global optimum.

국부적 향상을 이용한 적응적 교차 연산자

고명숙 부천대학 2004 論文集 Vol.25 No.-

유전자 알고리즘은 전역 해를 찾기 위해 전체 상태 공간을 탐색해 나가는 최적화 알고리즘이다. 본 논문에서는 유전자 알고리즘에서 국부적 향상을 이용하는 적응적 교차 연산자를 제안한다. 제안하는 적응적 교차 연산자는 bias_value라는 변수를 이용하여 실제 유전 연산에서 교차 연산이 적용될 범위를 결정하도록 한다. 국부적 탐색을 전통적인 유전자 알고리즘에 결합시킴으로써 전역해로의 수렴 속도를 향상시킬 수 있으며, 세대 진행에 따라 모집단 내의 개체들의 다양성을 유지 시켜 줌으로써 성급한 수렴 현상을 막아준다. 전통적인 유전자 알고리즘과의 비교를 통하여 제안한 방법의 탐색 효율을 평가하였다. 여러 가지 함수에 대한 최적화 실험을 통하여 기존 방법보다 적응적 교차 연산을 사용하는 유전 연산이 더 빨리 전역 해에 도달함을 증명하였다. Genetic Algorithm is an optimization algorithm, which searches the entire search space to find out the global optimum. In this paper, we propose a new crossover operator using Local Improvement in genetic algorithm. Proposed adaptive crossover operator restricts the crossover range by using bias_value. By Combining local search with a traditional genetic algorithm it can accelerate convergence speed to global optimum and prevent premature convergence through the maintenance of its diversity within the population in progressing of generations. We compared the search efficiency of proposed method with those of traditional genetic algorithms. We demonstrated that the proposed operator could find the global optimum faster than conventional method in optimizing several functions.

Estradiol에 의한 흰쥐-자궁의 수축 기능과 Polyamine 대사의 변동에 관한 연구

이명아,고재홍,이영재,신경호,전보권,천연숙 고려대학교 의과대학 1995 고려대 의대 잡지 Vol.32 No.3

The polyamines have been postulated to be essential in most processes associated with both hypertrophy and hyperplasia. The effects of estrogen on uterine contractility vary with animal species, and most reports have shown that in vitro contractility of rat uterus is decreased after estrogen treatment, but estrogen increases polyamine contents in castrated rat uterus. This study was carried out to investigate whether the regulation of polyamine metabolism may be instrumental in the contractile response of castrated nonpregnant uterus of female SD rats to electrical field stimulation (40 V, 100 μsec : EFS). Estradiol (E2) increased uterine contents of putrescine (PT), spermidine (SPD), and spermine (SPM). These E2 effects were inhibited by tamoxifen or DFMO, but E2-incuced increase of uterine SPM content was enhanced by aminoguanidine. E2 decreased the amplitude of force developed in the rhythmic spontaneous contraction of rat uterus, but it exaggerated the increase of uterine contraction force in response to EFS. The E2-dependent exaggeration was inhibited by tamoxifen, DFMO, or indomethacin, but was significantly enhanced by aminoguanidine. The synergism between E2 and aminoguanidine on uterine contractility was little affected by indomethacin. These results suggest that E2-dependent increase of uterine contractility may be ascribed partly to increase of uterus polyamines.

용어 중요도를 이용한 질의 수정

김주연,고명숙 부천대학 2002 論文集 Vol.23 No.-

본 논문에서는 사용자가 명백하게 피드백한 적합 문서들과 암시적으로 피드백한 비적합 문서에서의 용어 발생 빈도수를 이용하여 용어의 중요도를 산정하는 방법에 대하여 제안한다. 사용자에 의해 피드백된 적합 문서들에서 발생하는 용어들을 질의로 확장될 수 있는 후보용어로 선택하고, 적합, 비적합 문서들에서 후보용어와 초기 질의의 발생 빈도수(TF)를 이용하여 후보용어의 중요도를 산정하며, 피드백 문서내에서 후보용어의 가중치와 중요도를 결합하여 확장될 후보용어의 가중치를 산정 하였다. 본 논문에서는 성능을 평가하기 위하여 KT95와 KRIST 테스트콜렉션을 사용하였으며, 제안방법의 상대적인 성능을 평가하기 위하여 적합 피드백 분야에서 많이 사용되는 Dec-Hi 방법과 정확율-재현율 곡선을 이용하여 성능을 평가하였다. We propose, in this paper, a new query expansion technique with term reweighting. All terms in the relevant documents feedbacked from a user explicitly, excluding stopwords, are selected as candidate terms for query expansion and reweighted by the term significancy between a candidate term and each term in initial query. The term significancy of two terms is a measure on how similar their occurrence in relevant and nonrelevant documents which are feedbacked relevant explicitly or nonrelevant implicitly from a user. The terms to be actually expanded are selected using the term significancy and combined with initial query to construct an expanded query. We use KT95 and KRIST test collection to evaluate performance and compare our method with Dec-Hi method which is similar to our method, based on a curve of recall and precision.

Effects of a Group Exercise Program for the Upper Extremities on Sensory and Motor Function and Activities of Daily Living in Chronic Stroke Patients: A Case Series

( Myung Sook Ko ),( Yong Jin Jeon ) 한국전문물리치료학회 2015 한국전문물리치료학회지 Vol.22 No.2

The purpose of this study was to identify the effects of an upper extremities group exercise program based on motor learning in chronic stroke patients and to assess improvements in upper sensory motor function and activities of daily living (ADL). Five chronic stroke patients participated for the duration of 25 weeks. On the assessment of motor and process skills, there was a statistically significant improvement in motor area functioning in 4 of the subjects. In process area functioning, there was a statistically significant change in 3 of the subjects. Therefore, further studies are needed to assess sensorimotor area and ADL changes in chronic stroke patients to reduce medical cost and assess for positive psychological changes.

수정된 건측 상지 운동 제한 치료가 편마비 아동의 손 기능 향상에 미치는 효과

고명숙 ( Myung Sook Ko ),전혜선 ( Hye Seon Jeon ),권오윤 ( Oh Yun Kwon ),유은영 ( Eun Young Yoo ) 한국전문물리치료학회 2005 한국전문물리치료학회지 Vol.12 No.2

국내 간호학술지에 게재된 종양관련 연구 동향분석 : 2003 ∼ 2009년

고은(Ko Eun),소향숙(So Hyang Sook),김영재(Kim Young Jae),김혜영(Kim Hye Young),서남숙(Seo Nam Sook),이명숙(Lee Myung Suk),조인숙(Cho In Sook) 전남대학교 간호과학연구소 2010 Nursing and Health Issues(NHI) Vol.15 No.1

Ⅰ. 서 론 Ⅱ. 연구방법 Ⅲ. 연구결과 Ⅳ. 논 의 Ⅴ. 결론 및 제언

에이전트 기반 무선광 전송 기법

고명숙(Myung-Sook Ko),이태규(Tae-Gyu Lee) 한국조명·전기설비학회 2013 한국조명·전기설비학회 학술대회논문집 Vol.2013 No.11

한글판 아동 균형척도(Pediatric Balance Scale)의 측정기간 신뢰도

고명숙(Myung-sook Ko),이남현(Nam-hyun Lee),이정아(Jung-ah Lee),전혜선(Hye-seon Jeon) 한국전문물리치료학회 2008 한국전문물리치료학회지 Vol.15 No.1

  The Pediatric Balance Scale (PBS) is a modified Berg"s Balance Scale developed as a balance measure for school-aged children with mild to moderate motor impairments. The purpose of this study was to determine the inter-examiner reliability of the Korean version of PBS when applied to children with developmental delays. In this study, PBS was administrated to a total of 79 children with developmental delays (17 with global developmental delay, 31 with cerebral palsy, and 31 with mental retardation) in the Seoul Community Rehabilitation Center. Two pediatric trained physical therapists with longer than 13 years of clinical experience scored the children"s performance blind, while replaying videotaped data. The inter-examiner reliability was statistically determined by intraclass correlation coefficients (ICCs). The results of this study revealed that the Korean version of PBS seems to have high inter-examiner reliability when applied to children with movement disorders such as global developmental delay (ICC=.96) and cerebral palsy (ICC=.97); however, it has relatively lower inter-examiner reliability (ICC=.78) for children with developmental delay secondary to mental retardation. Therefore, the results support that the Korean version of the PBS could be a useful clinical measurement to assess the balance skills for children with developmental delay who have an adequate level of cognition to enable them to follow the verbal instructions to complete the test.

뇌성마비 아동의 소아 균형검사(PBS)와 대동작기능평가(GMFM)와의 상관관계

고명숙 ( Myung Sook Ko ),정재훈 ( Jae Hoon Chung ),전혜선 ( Hye Seon Jeon ) 대한물리의학회 2010 대한물리의학회지 Vol.5 No.2

Purpose:The purpose of this study was to examine the correlation between Pediatric Balance Scale(PBS) and Gross Motor Function Measurement(GMFM) with cerebral palsy(CP) children. Methods:31 ambulatory children with CP were recruited for this study. PBS is a modified version of the Berg`s Balance Scale to access the children with motor impairments. To access the motor functions that directly influence to the functional independence of the ambulatory CP children, total scores of standing category and walking/running/jumping category of GMFM were selectively compared with PBS score by Spearman correlation coefficient analysis. Results:The results revealed high correlation between PBS and GMFM scores both in standing and walking/ running/jumping categories(r=.9). Conclusions:Therefore, this study indicates that PBS can be applied not only as a tool to access balance, but also as a measurement to predict and access the level of standing and ambulatory related functions of children with CP.