철근콘크리트 구조물의 보수ㆍ보강 등의 유지관리를 위해서는 내구성과 내하성을 동시에 고려한 건전성평가의 의사결정기준이 절실히 요구된다. 본 논문은 CART-ANFIS을 사용하는 철근콘크리트 구조물에 대하여 효율적인 모델을 나타내었다. 철근콘크리트 구조물의 손상과 진단 등에 활용되어온 분류형 전문가시스템의 일종인 퍼지이론을 이용한 결정목 구조와 기존의 인공신경망을 이용한 결정목 구조의 건전성평가를 비교 분석한다. 손상된 철근콘크리트의 내구성 회복을 위한 보강설계 이론과 내하력 증가를 위한 보장설계 이론을 정립시켜 손상검출의 산정식을 유도하였다. 본 연구의 건전성 평가시스템 모델을 이용함으로서 보다 효율적인 철근콘크리트 유지관리 뿐만 아니라 생애주기비용 예측을 수행 할 수 있다.

Ti-6Al-4V 합금을 타겟트로 사용하여 유리 기판위에 dc reactive magnetron sputtering법으로 N2/(Ar+N2) 비, 기전력 및 시간등의 여러 가지 증착 조건에서 Ti-6Al-4V-N 필름을 증착하였고, 각각의 증착 조건에 따른 결정구조 및 우선방위 거동은 X-선 회절장치를 사용하여 조사하였다. Ti-6Al-4V-N 필름은 본질적으로 fcc 결정구조의 δ-TiN에 Al과 V이 결함으로서 고용된 변형된 형태의 δ-TiN구조이고, TiN의 격자상수(4.240 )보다 작은 값을 나타내었는데, 이는 Ti(1.47 )에 비하여 상대적으로 원자반경이 작은 Al(1.43 )과 V (1.32 )이 Ti의 격자위치에 치환된 결과이다. 그리고 Ti-6Al-4V-N 필름은 N2가스 분압이 감소됨에 따라 (111) 우선방위 성장거동을 하였을 뿐만아니라 증착시간의 증가에 따라 뚜렷한 (111) 우선방위 성장거동을 나타내었다. 그리고 증착속도 및 결정입도의 거동 또한 여러 가지 증착 조건에 크게 의존한다

The purpose of this study was to investigate selected nutrient intakes, dietary atherogenesity, energy balance and activity level of college students. One hundred and thirty one students (61 males and 70 females) made their three-day dietary records and one-day activity records along with one-day dietary records. BMI of the surveyed students was 22.33 for males and 20.28 for females. Average calorie intakes of male and female students was respectively 2166.20㎉ and 1793.60㎉. Females had slightly higher fiber intakes than males in terms of fiber g/1000㎉. Carbohyrate, protein and fat ratios in energy composition of males and females were respectively 56.62 : 15.33 : 24.70 and 57.64 : 16.49 : 25.79. Average cholesterol intakes of male and female students were 295.66㎎ and 259㎎ respectively. The male showed higher saturated fat intake, and had higher atherogenic indices of diets such as cholesterol index(CI) and cholesterol-saturated fat index(CSI) than the female. Males spent an average of 1039.00㎉/day compared to females of 687.93㎉/day for all physical activities. Most students participated in light(100% of males and females) and moderate(33% of males and 3% of females) activities level. Few students spent time at severe and very severe activity level. Seventeen of the 131 students were in positive energy balance whereas 83% were in negative balance. Both genders with positive energy balance tended towards smaller weight and BMI, and larger food intakes than those with negative energy balance. Students with positive energy balance had higher saturated fat intakes and dietary atherogenic scores of CI and CSI than the counterparts with negative energy balance. Males with positive energy balance had decreased physical activity and daily energy expenditure whereas increased food and saturated fat intakes. Females with positive energy balance had significantly increased food, saturated fat and sugar intakes.

본 연구는 총기대비용최소화기법에 의한 실용적이고 현실적인 해석모형을 제시하는데에 그 목적이 있으며, 주요목적중에 하나로서 철근콘크리트교량의 현장시험과 조사결과에 의해 도출된 저항계수(RF)라는 평가항목에 의해 현재 철근콘크리트부재들에 안전한 평가와 내하력을 결정하는데에 있다. 총기대비용최소화기법은 가정된 모델들의 신뢰성해석에 사용되며, 가정한 신뢰성모델과 신뢰성해석방법은 철근콘크리트부재들의 안전한 평가와 시스템계수에 적용되어진다.

시간영역에서는 경계요소법을 이용하여 실제점탄성체에 대한 응력 및 변위 해석과정을 논의하였다. 기본해와 응력커널들은 탄성-점탄성 대응원리를 사용하여 구하였다. 이완함수는 지수함수들의 합으로 전개되고, 변형된 기본해와 응력커널들은 실제시간 공간으로 수치적인 방법에 의해 전환된다. 제안된 과정정은 수치해석을 수행하는데 큰 노력을 요하지 않으며, 실제점탄성체 해석에 응용될 수 있다. 예저의 결과들은 제시된 방법의 효율성과 응용 가능성을 보여준다.

본 연구에서는 보울트-너트 체결기구의 체결장력 설계(Pre-Load Design)시 중요한 인자의 하나인 체결체의 강성(Stiffness)을 유한요소법을 이용하여 해석하였다. 비선형 간극요소(Non-linear Gap Element)와 최적화 기법(Optimization Technique)을 도입하여 유한요소해석 과정에서 요구되는 경계조건(Boundary Condition)의 설정과정을 일반화하였으며, 체결체간의 기밀성 상실 현상을 입증하였다. 변형량과 응력분포로부터 체결체의 강성을 해석하고, 기존의 경험식의 적용범위를 검토하였다.

Current Bridge foundation design is based on Working Stress Design(WSD), but Load Factor Based on Optimum Reliability(LFBOR) design method is more rational than the WSD. For this reason, this study proposes a reliability based design criteria for the bridge foundation, which is most common type of bridge foundation(Shallow, Pile and Caission), and also proposes the theoretical basis of nominal safety factors of stability analysis by introducing the reliability theory. The limit state equations of stability analysis of bridge foundation and the uncertainty measuring algorithms of each equation are also derived by Cornell's MFOSM(Mean First Order 2nd Moment Methods)using the stability analysis fourmula Highway Bridge Design Codes.

A series of experiments were carried out for two successive years to investigate the productivity of forage turnip in mid-northern area of Korea. Fresh matter and dry matter yields of 6 foreign cultivars (Purple Top Strap Leaved, Purple Top White Globed,

본 연구는 대덕산･금대봉 생태계보전지역 내 분포하는 관속 식물상을 파악하여 식물분포를 밝히고, 향후 대덕산-금대봉 생태계보전지역의 주요 식물에 대한 효율적인 관리와 보전을 위해 수행하였다. 2017년 4월부터 2019년 10월까지 총 14회에 걸쳐 현지조사를 실시하였다. 대덕산-금대봉 생태계보전지역에 자생하는 관속식물상은 83과 245속 372종 4아종 45변종 8품종으로 총 428분류군이 조사되었다(Appendix 1). 이 중 한국특산 식물은 키버들, 참개별꽃, 진범, 갈퀴현호색 등 19분류군이며, 환경부지정 희귀 및 멸종위기 식물은 개병풍, 가시오갈피, 대성 쓴풀, 복주머니란으로 총 4분류군이 조사되었고, 산림청 지정 희귀식물은 19과 34속 34종 2변종 총 36분류군이 나타났다. 침입외래식물은 토끼풀, 달맞이꽃, 지느러미엉겅퀴 등 4과 8속 8종 총 8분류군으로 조사되었으며. 도시화지수(UI)는 2.5%, 귀화율(NI)은 1.9%로 나타났다. 본 조사지역의 양치식물은 7과 9속 7종 2변종으로 총 9분류군이 나타났고, 양치식물계수는 0.52로 나타났다. 대한약전 기준 약용자원식물은 16과 24속 24 종 2변종 1품종 27분류군이 확인되었다. 민속식물은 772과 175 속 216종 28변종 3품종 4아종 251분류군이 확인되었으며, 대덕산‧금대봉에서 출현한 428분류군 중 58.6%가 민속식물로 나타났다. 민속식물을 분류 별로 보면 가장 많은 213분류군이 식용 식물로 분류되었다. 약용식물은 161분류군이었으며, 향신용식물은 11분류군으로 나타났다. 환경부에서 멸종위기 식물로 지정된 대성쓴풀과 복주머니란 등의 희귀식물은 시급히 보호 및 보전에 필요한 대책을 마련해야 할 것으로 판단되며, 나도범의 귀는 북방계식물로 남한 내 자생지가 검룡소 1곳이 보고되고 있어 자생지보호의 필요성이 있을 것으로 판단된다.

In this study, we typified the project for revitalizing the rural area through text analysis using news data, and analyzed the main direction and characteristics of the project. In order to examine the factors emphasized among the issues related to the revitalization of rural areas, we used news data related to 'tourism' and 'livelihood', which are the main keyword of the project to promote rural areas. In the analysis, text mining techniques were used. Topic modeling was conducted on LDA techniques for major projects in 'tourism' and 'livelihood' keyword. Based on this, this study typified the projects that are carried out for the activation of rural areas by topic. As a result of the analysis, it was fount that the topics included in the project were distributed in 11 sub-types(Tourism Promotion, Regional Specialization, Local Festival, Development of Regional Scale, Urban and Rural Exchange, Agricultural Support, Community Forest Management, Improve the Settlement Environment, General Welfare Service, Low Class Support, Others). The characteristics of the rural revitalization projects were examined, and it was confirmed that domestic projects were carried out by tourism-oriented projects. To summarize, the government is making projects to revitalize rural areas through related ministries. Within the structure where the project is spreading to the region, a lot of projects are being carried out. It is understood that the tourism and welfare oriented projects are being carried out in the revitalization project of the domestic rural area. Therefore, in order to achieve the goal of rural revitalization, it is believed that it will be effective to carry out a balanced project to improve the settlement environment of the residents.

This study was designed to understand the change of rural landscape and to consider problems followed by development restrictions lifted for Neobiul Village in Ansan City, Korea. Physical landscape changes were comprehended by a field study and interview with local residents, and the residents’ perception regarding the landscape changes were analyzed with the REP investigation method. The results can be summarized into the following three points: First, due to the lift of development restrictions and the deregulation of land use, the number of factories and warehouses for rent increased, which became a new source of income for the village. Second, the residents’ complaints increased due to the increased traffic volume and waste from a sudden influx of factories and warehouses, which could not be handled by a small farming village. Third, a mix of landscape combining both city and farming village was formed due to the influx of external capital and the need of rental income, although the residents rather wanted Neobiul Village to become a residential village than a factory location. Furthermore, even in the farmlands near the village where development restrictions have not been lifted, the level of dependence on the farming industry has decreased as a consequence of the increase in farmland rent and weekend farms. This paper confirmed that the change of rural landscape followed by lifted development restrictions affects the everyday life of residents living in Neobiul Village. This study has significant implications in that it suggests a case showing the effects of national policies such as lifting development restrictions for rural villages in suburban areas.

The purpose of this study is to assess residents' perception of the revitalization projects of the rural center and to evaluate their views of the projects' importance and their levels of satisfaction with how they have been carried out. In this study, we measured the residents' perceptions and preferences regarding these projects by using Importance-Performance Analysis (IPA). Results showed that residents' perceptions and satisfaction were the highest for the projects providing welfare facilities, even though this project has little relevance to the overall project goal. Residents were dissatisfied with construction projects such as the building of cultural facilities and urban parks, even while recognizing their importance. It is necessary to establish what problem the people perceive and to manage them appropriately. Next, the residents did not appreciate the community empowerment projects, nor did they evaluate the contents of the program positively. It can therefore be seen that the community empowerment projects have not been carried out well. Finally, the street landscape improvement project was not successfully implemented compared to other projects. The residents have negatively perceived the installation of facilities that they do not want, rarely use, or are poorly operated. this shows that the evaluation of residents is significant. They become the users of the revitalization project for the rural center. It is necessary to overcome problems such as project items chosen by professionals without local consultation and obvious design in the revitalization project of the local center. There is a need to ascertain the residents' opinion of each project and to encourage them to participate directly in the management operation.

This study started with drawing problems of early implementation and suggesting improvement plans in order to lead a rural convergence industrialization district system to early settlement and management for its policy goals. The study aimed at 13 districts that were designated from 2014 to 2016 for analyzing an actual condition of promoting early implementation, and went ahead with it combining literature research, interview survey and specialist opinion investigation. The study examined and organized an outline, policy goal, and actual condition of rural convergence industrialization district. Furthermore, it analyzed an actual condition of promoting at each stage such as designating processes of rural convergence industrialization districts, operating body and system, regulation improvement, district supporting projects and relating projects, drew problems and finally suggested improvement plans. This study could be meaningful because it is the first study to grasp an actual condition of promoting early implementation and to remedy problems in order to manage rural convergence industrialization district system which was newly promoted since 2014 for its policy goal. In addition, it suggests that the further study of the result after managing district system for a certain period of time should be needed.