The purpose of this study was to analyze the effects of partial solar eclipse on 21 May 2012 in Korea on meteorological variables in Busan. 0800 LST(Local Standard Time) solar radiation was similar or lower than 0700 LST solar radiation, and sunshine duration decreased by 0.2∼0.5 hours in Busan and great cities under the influence of the partial solar eclipse. Temperature drop due to the partial solar eclipse was 0.2∼2.0℃, time taken to arrive at maximum temperature after onset of eclipse was 8∼62 minutes, and time taken to arrive at minimum temperature after maximum eclipse was -9∼17 minutes in Busan. Change of wind speed was negligible as partial solar eclipse occurred in the morning. Soil temperature of 5 ㎝was minute as well, the increase of soil temperature due to sunset was delayed by more than 1 hour.

본 연구의 목적은 교과교실 운영의 핵심요소를 밝혀내고, 이를 기초로 교과교실의 양적 확대와 질적 심화를 통해 단계적으로 확산하는데 필요한 정보를 생산·제공하는데 있다. 이를 위해 첫째, 2011년 현재 선진형 교과교실제를 운영하는 106개교의 실태를 종합적으로 살펴보고, 둘째, 2011년 교과교실제 우수 운영 학교를 방문하였으며, 마지막으로 106개교 교과교실제 담당교사를 대상으로 반구조화된 질문지를 마련하여 면담을 통해 교과교실제와 관련된 시설 운영 측면과 수업 운영 측면에 대한 조사를 실시하고 이를 종합하였다. 이를 바탕으로 연구진은 10여 차례의 집중작업과 전문가협의회를 통해 교과교실 운영의 핵심요소로 공간 특성(수업용, 교사용, 학생용)과 교과교실에서 이루어지는 수업 특성(블럭타임, 수준별 이동수업, 집중이수)의 총 6가지를 추출하였다. 또한 교과교실 운영 유형은 학교의 기본 시설을 중심으로 구분할 수 있다고 보아, ‘수업공간강화형, 교사공간강화형, 학생공간강화형’으로 대별하였다. 후자로 갈수록 시설을 더 충실히 갖추는 것으로 보았을 때, 이것은 학교 현장에서 교과교실을 도입․정착․발전시켜가는 순서이기도 하다. 이를 바탕으로, 각 학교는 주어진 여건을 종합적으로 고려하여 최적의 유형을 도입․발전시켜 나아가야 함을 제안하였다.

The main purpose of this study is to identify the connection between urban characteristics and food wastes production. As a fundamental work for ‘Resource Recirculation’ in the metropolis, urban indicators is classified into traits of population, land use, residential construction, traffics, industries and economies in detail and then the extracted particular variables illustrate the relation of urban features and organic wastes by classifying urban indicators into traits of population, land use, residential construction, traffics, industries and economies. The scope of research is conducted in seventy-four district (Gu in Korea) in seven metropolises including Seoul to manifest the interrelationship of cities and wastes by correlation and multiple correlation analysis. According to this research, it concludes that the most influential variables for the existing food wastes treatment facility's location is the economic variables, property taxes than the population traits such as the number of population and employees. Particularly, the a noteworthy part is that the household is more critical element of wastes generation than the total population in population features.

This paper presents analytical studies on the cyclic behavior of column-tree steel moment connections by FEA. The column-tree moment connections are composed shop welded beam-to-column connection and field bolted beam-to-beam splice. Two analytical model of column-tree moment connections were designed with beam splice lengths of 900mm and 1,100mm, which are roughly 1/6 and 1/7 of the span length of 7,500mm. In order to verify the FEA reliability, the analytical results was compared with experimental results. Meanwhile, the experimental results were understood better through analysis procedure.

For coupled shear walls, coupling beams are the first line of dissipation under earthquakes. So coupling beams are important energy dissipation component. When coupling beams have little depth-to-span ratio, routine coupling beams have less capacity of energy dissipation.There are less design methods for coupling beams with depth-to-span less than 2. In this paper a specimen with steel plate reinforcement coupling beam was designed and analyzed by means of FEM software ABAQUS.

The purpose of this study was to evaluate the seismic performance of high-performance steel. For this study, the hysteretic behavior and deformation shape of steel beam-to-column connections with SM570TMC was investigated using non-linear finite element analysis. The non-linear finite element analysis was carried out using ANSYS. The displacement analysis of steel beam-to-column connections was conducted according to the qualifying procedures of current korean building code(KBC2009).

Experimental studies on prestressed steel-concrete composite beams with various types of innovative webs have been conducted to improve prestress efficiency and composite action. These researches observed that the efficiency of prestress introduced into the flanges of composite beams with corrugated webs or discontinuous webs significantly increased due to accordion effect. In this study, nonlinear finite element analysis has been performed to evaluate the local behavior of specimens that are very difficult or sometimes impossible to observe. A suitable modeling method for PS composite beam has been developed, which can consider the loading stages along construction sequences and the interface interaction between different materials such as concrete and steel. The analysis results have been compared to test results for verification.

The purpose of this Study is to find an appropriate cross-section of the block as a drawback of hollow concrete block field work. Formed Concrete Block was evaluated by FEM Method in a variety of stress conditions in order to find the optimum cross-section. As a result, the block has higher vertical resistance than horizontal and the strength of it depends on the thickness of web.

In this study, the unique material characteristics of steel fiber-reinforced concrete were introduced to extend the application of the compression field models to evaluations of shear capacity and behavior of steel fiber-reinforced concrete (SFRC) members. To achieve this purpose, nonlinear finite element program is developed using secant stiffness-based formulations, and the proposed numerical model was verified using basic experimental results of SFRC shear panels.

In recent year, a reduction of the damage to nonstructural components such as piping, ceiling, mechanical and electrical equipments or an improvement on the performance of nonstructural components has emerged as a key area of research. Therefore, the primary objective of this study was to evaluate and understand the seismic performance of the complex piping system such as a T-joint connection. Furthermore, it was targeted on evaluating the Finite Element (FE) Model of the T-joint connection based on moment-rotation relationship of the experimental tests. The results of FE analysis by OpenSees were in a good agreement with the experimental test result till the failure point in both models.

Not long ago, most escavation methods for tunnel or underground structure are selected by NATM method. But these days such as Shield TBM or Semi-shield TBM are applicated for structure length and ground condition. On the other hand almost TBM technology is depend on foreign country, so this technology is much a work in process. In this study, information factors during TBM tunnel construction was suggested by analysis in-situ data

This study presents numerical analysis of elastic waves for detecting damage in epoxy adhesive zone. For the finite element analysis, a finite element program ANSYS LS-Dyna is used. The result signals of finite element analysis were analyzed by using pitch-catch method. It is shown that the received time signals successfully show the existence of defects

Boussinesq 모형인 FUNWAVE를 사용한 수치모의 결과를 바탕으로, 파고, 주기, 파향 및 조위와 같은 파랑특성 변수에 따라 해운대 이안류의 발생가능 정도를 추정하였다. 2011년 6월 12일에 발생한 이안류를 수치모의하여 이안류 발생 가능정도를 확인함으로써 정량화 기법을 제시한다. 이 이안류 발생정도의 정량화 기법은 다음의 절차를 따른다. 첫째로, 광범위하게 파고, 주기, 파향, 조위를 변화시키며 불규칙파를 해운대 수심지형에 적용하여 해운대 연안흐름을 수치모의 하였다. 둘째로, 이 수치모의 결과로부터 연안의 직각방향(cross shore direction)의 2주기 시간평균된 유속성분을 추출하고, 연안영역에 대하여 이 유속값의 심해방향 최대값을 그 영역의 ‘이안류 유속’으로 정의하였다. 셋째로, 전체 수치모의 시간에 대한 ‘이안류 유속’ 시계열이 임의의 위험유속을 초과한 시간의 비를 위험 이안류 발생 가능 정도로 정의하여 정량화하였다. 추정된 이안류 발생정도에 따른 분석으로부터, 파고가 클수록, 주기가 길수록, 조위가 낮을수록 이안류가 더 잘 발생하는 것으로 나타났으며, 파향은 남동쪽보다 남서쪽 파향에서 조금 더 이안류가 잘 발생하는 것으로 나타났다.