• Korean Journal of Microbiology
• /
• v.30 no.2
• /
• pp.83-87
• /
• 1992

When the transposon is used as a selectable marker. the cotransduction frequency depends on the selection order of the markers. In this study. we adopted a mathematical approach to explain this phenomenon. At first, the formation of transducing particles were considered in five different configurations. Then the probability functions indicating the possibilities for a marker to be fixed were mathematically formulated on the basis of probability density concept. After actual values and useful assumptions were integrated into the Formula. resulting frequencies from theoretical calculations were compared with actual data. Such analysis let us conclude that the asymmetry in the frequency arose from the lack of homology required for homologous recombination due to the transposon insertion and from the suppression of recombination around the region where the transposon is inserted.

• Economic and Environmental Geology
• /
• v.50 no.3
• /
• pp.195-214
• /
• 2017

Statistical landslide susceptibility analysis, which is widely used among various landslide susceptibility analysis approaches, predicts the unstable area by analyzing statistical relationship between landslide occurrence locations and landslide controlling factors. However, uncertainties are involved in the procedures of the susceptibility analysis and therefore, fuzzy approach has been used to deal properly with uncertainties. The fuzzy approach used fuzzy set theory and fuzzy membership function to quantify uncertainties involved in landslide controlling factors. Various fuzzy approaches were suggested in the procedure of the membership value determination and fuzzy operation in the previous researches. However, few studies were carried out to compare the analysis results obtained from various approaches for membership function determination and fuzzy operation. Therefore, in this study, the authors selected Jinbu area, which a large number of landslides were occurred at in 2006, to apply two most commonly used methods, the frequency ratio and the cosine amplitude method to derive membership values for each controlling factor. In addition, the integration of different thematic layers to produce landslide susceptibility map was performed by several fuzzy operators such as AND, OR, algebraic product, algebraic sum and Gamma operator. The results of the landslide susceptibility analysis using two different methods for the determination of fuzzy membership values and various fuzzy operators were compared on the basis of ROC graph to check the feasibility of the fuzzy based landslide susceptibility analysis.

• Journal of Agricultural Extension & Community Development
• /
• v.17 no.2
• /
• pp.279-304
• /
• 2010

한국의 농촌개발정책은 지난 50년에 걸쳐서 많은 변화를 겪어왔다. 농촌개발정책은 국내외의 정책 환경인자와 관련성을 맺는 가운데, 농업 농촌이 처한 시대별 과제를 해결해나가는 과정의 결과라고 여겨진다. 농촌개발정책은 1960년 이후 현재까지의 기간 동안에 4단계의 시기별, 정책구성요소별로 의미 있는 변화가 일어나고 있다. 2000년을 전후하여 국가발전을 위한 행정이념이 효율성에서 형평성으로 전환됨에 따라 농촌개발정책은 전반적이고 근본적인 변화에 직면하고 있다. 농촌지역은 국가발전을 위한 새로운 가치와 자원을 가지고 있는 공간으로 재인식되고 있다. 농촌은 곧 마을이라는 으로 변화되고, 농촌의 소도읍이 새로운 농촌지역의 삶의 미시적인 관점에서 접근되던 정책이 인근의 도시와 연계를 맺는 방향 공간으로 접근되고 있다. 농촌개발정책은 농업을 중심으로 하는 정책에서 비농업부문의 개발을 중시하는 방향으로, 지역농업과 공간정책을 통합하여 개발하는 방향으로 나아가고 있다. 이 과정에서 농촌개발과 관련이 있는 중앙정부 부처의 수가 증가하는 가운데, 지방정부와 지역주민의 역할이 강조되면서, 수직적 수평적인 분권화와 협치 체제의 구축이 중요해지고 있다. 또한 지역의 고유성과 지역단위사업의 연계성에 대한 강조는 자연히 지역단위 계획제도의 정착과 이를 현실적으로 뒷받침할 수 있는 예산제도의 변화를 가져오고 있다.

• Journal of the Korean Association of Geographic Information Studies
• /
• v.6 no.1
• /
• pp.59-77
• /
• 2003

This study is to validate the use of macro language for the land suitability analysis aiming to help to resolve land use conflicts. The silver-town suitability analysis is conducted on the Geejang Gun, Busan Metropolitan city. Such digital maps as terrain, road, facility, and water body were created for various cartographic models. A cartographic model identified the best suitable areas for silver-town development based on the such site selection variables as a distance to facility and road, slope and aspect of terrain, land use etc. Then, the other cartographic model identified the most favorable site among the candidate sites based on the comparison of the aspect of proximity, usage and environmental quality. Macro language was used for these modeling process and was used for the manipulation of all these spatial variables used in the models to resolve land use conflicts relating to the decision making process of the final site selection. This study will improve the effectiveness and rationality of the traditional site suitability analysis.

• Archives of design research
• /
• v.13
• /
• pp.45-53
• /
• 1996

After the callapse of the 80's bubble economy. consumers tend to consider the fundamental values of a product such as price, usage, and quality more significantly than ever before. Due to this change in attitude. the most important factor in a consumer's decision for choosing a product becomes the quality of a product that safisfies consumer's practical values whith convincing features and logical differentiations devoted to fundamental values. Under the circumstances. Factor Oriented Process and Multi-Sequential Process are proposede not just as merely defining concept through study of consumers' needs. but as methods of gaining competitive edge and eatablishing corporate identity in market, competition by bringing out consumers' various wants and needs to lead them to a specific product. Factor Oriented Process emphasizes the analysis of factors within the process itself, especially the synthesis of factors which would bring about new solutions as its special feature and acts as a logical element for further design development. Thus, the synthesis process consists of re-organizing analyzed factors, andduring this process, analyzing correlation between the restrictions of factors would lead to discovery of 'dominant factors'. Afterward, design basis may be formed with design concepts proposed by several concept codes made up of one dominant factor and other associate factors. Multi-Sequential Process is an extensive approach to discover differentiated design proposals through careful examination of dominant factors within the product, and furthermor, to discount 'anterior factor' (directional factors that decide design directions based on multi-value criteria) for self-determined decision of design directions.

• Journal of Korean Society of Transportation
• /
• v.28 no.6
• /
• pp.55-62
• /
• 2010

The purpose of this research is to provide an a basic data for setting design standards and proposing improvement for public open space by analysis one which is the factor that quite influences public open space by factor analysis. First, Extract main design factors by survey and field investigation of the Public Open Space of Centum and Seomyeon in Pusan. After the extraction, Control and simulation of main design factors which selected by survey for making better improved public open space and resolving problems of it. Based on simulation data, the five-factors drawed by psychological estimation and factor analysis are Accessibility, Intimacy, Openness, Amenity, Convenience. By use of a result, Multiple Regression Analysis is implemented for correlation analysis between five-factors and user's satisfaction in the public open space. Therefore the it which influenced user's satisfaction in the public open space most was Accessibility. So, the public open space must be designed to improve Accessibility and Intimacy, Openness, Amenity, Convenience which influenced user's satisfaction were reviewed primary.

• Proceedings of the Korean Information Science Society Conference
• /
• 2003.04c
• /
• pp.67-69
• /
• 2003

소프트웨어 시스템을 집적하는데 있어서 컴퍼넌트 중심의 소프트웨어 개발 접근 방법이 큰 경향이다. 집적 소프트웨어 시스템의 전체 신뢰도를 확보하기 위해 소프트웨어 컴퍼넌트의 테스트 및 자원의 유한성 내에서 소프트웨어가요하는 조건을 만족해야만 한다. 기지의 비용, 신뢰도, 테스트 노력, 시스템 컴퍼넌트의 기타 다른 공헌 인자를 가지고 순열조합의 최적화 문제로서 시스템 테스트의 최적화 문제 효율을 공식화할 수 있다. 본 연구에서는 그 각각이 사전에 명세화한 신뢰도 요건을 가진 단일 또는 다중 실용화 시스템에 대한“소프트웨어 컴퍼넌트 테스트 자원 할당”을 고려한다. 이것은 내고장(fault-tolerant) 시스템에도 확장해서 실용화할 수 있다. 테스트 자원 할당문제에 체계적으로 접근하는 절차를 논하고자 한다.

• Proceedings of the Computational Structural Engineering Institute Conference
• /
• 2011.04a
• /
• pp.489-492
• /
• 2011

장대레일 궤도의 부동구간에서 발생되는 과도한 축력은 혹서기 궤도의 좌굴을 유발시켜 주행하는 열차의 안정성을 위협할 수 있다. 궤도 제원을 제외한 압축응력과 관련된 레일온도 인자, 궤도 강성과 관련된 도상저항력, 궤도의 초기결함인 궤도틀림과 같은 인자들은 기후조건, 궤도 운영조건, 유지관리조건 등에 의해 임의적으로 변동되는 불확실성이 높은 궤도 매개변수이다. 그러므로 장대레일 궤도의 좌굴은 불확실성이 높은 현상임을 알 수 있다. 따라서 궤도 매개변수들의 불확실성 및 임의성을 합리적으로 고려하기 위해서는 확률론적 접근방법의 적용이 필수적이라 할 수 있다. 본 논문에서는 기존 본 연구진에 의해 개발된 장대레일 궤도의 좌굴확률 평가시스템을 이용하여 장대레일 축력을 산정하기 위한 필수요소인 중립온도의 확률분포 특성에 따른 좌굴 안정성을 분석하였다.

• Journal of the Korean Society for Aeronautical & Space Sciences
• /
• v.39 no.12
• /
• pp.1107-1114
• /
• 2011

In this paper, the fatigue life of a laser peened structure was predicted. In order to calculate residual stress induced by laser peening finite element simulation was carried out. Modified Goodman equation was used to consider the effect of compressive residual stress induced by laser peening in fatigue analysis. In addition, additive adjustment factor approach was applied to consider S-N curve model uncertainty. Consequently, the reliable bounds of the predicted fatigue life of the laser peened structure was determined.

• Korean Journal of Environment and Ecology
• /
• v.9 no.2
• /
• pp.232-249
• /
• 1996

The purpose of this is to suggest objective basic data for the use development and conservation management of the national park through the quantitative analysis of the visual quality included in the physical environment of the Odaesan National Park, for this, spatial images structure of physical elements have been analyzed by factor analysis algorithm and degree of visual quality have been measured mainly by questionnaries. Result of this thesis can be summarized as follows. Factors covering the spatial image of the Odaesan National Park landscape have been found to be the pverall synthetic evaluation, physical, spatial, natural quality and, appeal factors such as the overall the synthetic evaluation, spatial and appeal yield high factor scores. As for the factors determining the degree of visual quality of clear of valley, peculiarity of configuration, natural of trail, harmony of suitable artificaial planting and temple.