http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Song,Moon-Tae,Lee,Jeom-Ho,Lee,Sang-Bok,Cho,Youn-Sang,Ku,Ja-hwan,Seo,Kyoung-In,Choi,Seong-ho,Hwang,Heung-Goo 한국자원식물학회 2003 Plant Resources Vol.6 No.1
Molecular markers are useful tools for evaluating genetic diversity and determining cultivar identity. Present study was conducted to evaluate the genetic diversity within a diverse collection of rice accessions used for Korean breeding programs. Two hundred eighty-seven rice cultivars, composed of temperate japonica, tropical japonica, indica, and Tongil-type of Korean crossing parents were evaluated by means of 15 simple sequence repeat (SSR) markers. A total of 99 alleles were detected, and the number of alleles per marker ranged from 4 to 11, with an average of 6.6 per locus. Polymorphism information content (PIC) for each of the SSR markers ranged from 0.2924 to 0.8102 with an average of 0.5785. These results, with the result that use of only 15 SSR markers made all rice cultivars examined could be uniquely distinguished, imply the efficiency of SSR markers for analysis of genetic diversity in rice. Cluster analysis was performed on similar coefficient matrics calculated from SSR markers to generate a dendogram in which two major groups corresponding to japonica (Group I) and indica and Tongil type rice (group II) with additional subclasses within both major groups. The narrowness of the Korean breeding germplasm was revealed by the fact that most of the Korean-bred and Japan-bred temperate japonica cultivars were concentrated into only 2 of the sub-group I-1 (143 cultivars) and I-2 (58 cultivars) among six sub-groups in major group of japonica. This is because of the japonica accessions used in this study was a very closely related ones because of frequent sharing of the crossing parents with similar genetic background with synergy effect of the inherited genetic difference between indica and japonica. A rice breeding strategy with the use of molecular markers was discussed for overcoming of genetic vulnerability owing to this genetic narrowness.
회전기계 계통을 가동시키는 직류전동기의 데드비트제어시스템 연구
송자윤 한국정보전략학회 1999 추계공동학술대회 논문집 Vol.- No.01
이 연구는 인쇄기제어와 같은 기어를 포함한 직류전동기로 가동되는 회전계통 플랜트의 제어에 관해서 적분제어기와 전차수 상태관측기 및 영차홀드로 구성되는 데드비트제어시스템을 제안하고 있다. 샘플링된 연속데이터시스템의 응답은 샘플링사이에 리플이 발생치 않도록 보장할 수 없지만, 제안된 데드비트제어시스템의 응답은 MATLAB시뮬레이션을 통한 사례연구의 결과, 상태귀환형 최적제어나 출력귀환형 제어시스템응답 등에 비하여 정정시간이 훨씬 빠르고, 주어진 샘플링주기 후에 리플없는 출력응답을 얻을 수 있음을 보여준다 This paper presents a design of deadbeat control system for DC motor driving such a rotational mechanical system with gear as printing machine. The deadbeat response design developed for control system of a sampled continuous-data process does not guarantee zero intersampling ripples, but the proposed deadbeat control system that consists of the integral controller and the full-order state observer, has many advantages such as an output response without the ripples, and settling time than the optimal control system in the same sampling period. The results of case study through MATLAB simulation are shown that the efficiency of the proposed controller for DC motor driving a rotational system with gear is verified by comparing with optimal controller etc..
발기부전 검사에서 천연색 복합초음파촬영술과 야간음경발기검사의 일치도
송윤섭,구자현,김민의,이혜경,김두상,박영호,이남규 순천향의학연구소 1999 Journal of Soonchunhyang Medical Science Vol.5 No.1
We intended to know that the result of color duplex ultrasonography corresponded to that nocturnal penile tumescence rigidity in the diagnosis of erctile dysfunction. We performed both color duplex ultrasonography and nocturnal penile tumescence rigidity in 15 erectile dysfunction men. Colr duplex ultrasonography was done with a 7 MHz. color Doppler unit after intracorporeal pharmacological injection and measured maximal arterail diameter, peak systolic velocity, end-diastolic velocity and the results were compared with rigidity and tumescence in nocturnal penile tumescence rigidity using RigiScan. The positive predictive value, negative predictive value, sensitivity, specificity, overall accuracy of color duplex ultrasonography was reasonable when the result of color duplex ultrasonography was compared with the that of nocturnal penile tumescence rigidity. According to this results, color duplex ultrasonography could not only predict but also correspond to nocturnal penile tumescence. Therefore, we suggest that color duplex ultrasonography can relpace nocturnal penile tumescence rigidity if psychogenic and neurogenic erectile dysfunction are distinguished by history and neurologic examination.
PISA 2012 결과에 나타난 성별에 따른 학업성취 영향요인 비교
송미영,임현정,임해미,박혜영,구자옥 이화여자대학교 교육과학연구소 2015 교육과학연구 Vol.46 No.4
The existence of gender gaps in the Programme for International Student Assessment (PISA) scores has been documented in the literature. In particular, it was revealed that on average Korean female students underperform/outperform their male counterparts in mathematics/reading scores for PISA 2012. This study was conducted to examine crucial determinants in understanding gender differences. We examined whether or not the influence of educational contextual variables on mathematics, reading and science achievement differs by gender using multilevel model with each group of male and female students. As a result, there were variables that had more influence on male or female students, though there were some differences by subject. It can be concluded that females have been affected more by teachers than by parents, while males have been affected more by parents. Also, creative extracurricular activities had much more of an effect male students than females. In addition, participation in math-related activities only influenced females, and academic and vocational expectation in math and class management of math teachers only influenced male students. Based on the results, we proposed an educational and political plan that may bridge disparity gaps in academic achievement by gender.
송자영,최병석 동국대학교 산업기술연구원 2009 산업기술논문집 Vol.18 No.2
RED(Random Early Detection)는 그 구현의 단순함으로 인하여 매우 널리 사용되고 있으나 다양한 작업부하를 가지는 환경들에 적응하기에는 많은 부족한 점 역시 존재하여 다양한 변형이 이루어 졌다. 대표적인 것으로 고정된 매개변수로 인하여 환경에 대한 반응성이 떨어지는 RED의 단점을 개선하기 위해 작업부하의 번동에 대한 반응성을 추가한 ARED(Adaptive-RED)가 있다. 그러나 ARED 또한 α, β 값을 수동으로 설정해야 하는 문제가 존재한다. 본 논문에서는 멀티코어 마이크로프로세서 하에서 인공지능의 유전 알고리즘을 이용하여, 자동적으로 α, β 값을 찾는 기법인 AI ARED를 제안한다. 실험을 통하여 AI ARED가 찾아낸 매개변수는 혼잡 하에서 수동적인 ARED 매개변수보다 환경에 더욱 잘 적응하는 효율적인 서비스를 제공하여 준다는 것을 확인 할 수 있다. RED(Random Early Detection) is used widely because of the simplification of realization. However, it has the disadvantage that it is difficult to adjust to the environment having a variety of workloads. Therefore, it cause a variety of modification. As the typical example, there is ARED(Adaptive-RED) to add the reactivity to the variation of workload to improve the shortcoming of RED which is short of the reactivity to the environment by the fixed parameter. But ARED also has a problem manually to configure α, β. In this paper, we propose AI ARED, which automatically search α, β using Genetic Algorithm of Artificial Intelligence in Multi-core Micro-processor. As a result, ARED parameter that AI ARED searches through simulations in congestion is more adaptive to environment than manual ARED parameter, providing the effective service.
宋省憲,구자용 弘益大學校 科學技術硏究所 1995 科學技術硏究論文集 Vol.6 No.-
The purpose of the paper is to suggest a decision supporting method applicable to the real world for determining the locations of logistics centers and their service areas. It doesn't simply suggest the unique optimal locations minimizing the related logistics costs. In stead, it computes the logistics costs and the service level for each logistics network alternative. For the given network the optimal flow quantities from suppliers to logistics centers and from logistics centers to customers can be obtained by solving the minimum cost allocation model. By adding the transportation costs obtained from the minimum cost allocation model and other fixed and variable operating costs of location centers the total related logistics costs can be calculated. It allows the decision maker to consider both of the aspects of quantity and quality.