The purpose of this study is to evaluate the seismic performance of unreinforced masonry(URM) building more accurately. For that, the nonlinear hysteresis models of preceding research did not validate for dynamic analysis. Therefore, in this study, we compared the results of the shaking table test and dynamic analysis. As a result, nonlinear hysteresis models are expected to be applicable.

광역보정시스템은 GPS와 같은 위성항법을 이용하는 사용자의 정확성, 무결성을 개선시키기 위하여 고안된 시스템이다. 본 논문에서 는 개발된 의사위성 기반의 광역보정시스템의 전체 구조에 대하여 설명하고, 후처리 기반으로 상용 수신기에 대하여 성능 테스트를 수행하는 실험 방법 및 결과에 대하여 설명한다. 보정정보 생성을 위하여 총 5개의 NDGPS 기준국에서 수집되는 데이터가 활용되었으며 이를 광역기준 국, 중앙처리국 소프트웨어에서 처리하였다. 생성된 보정정보는 SP3, IONEX 데이터와 비교하여 정확도를 테스트하였다. 상용 수신기 실험에서 는 사용자의 RF 신호를 수집, 보정정보를 생성하였으며, 이후에 RF신호와 보정정보가 실린 의사위성 신호를 동시에 방송하여 테스트를 수행하 였다. 테스트는 3대의 상용수신기를 활용하여 수행되었으며 MSAS, GPS 단독 측위 수신기와 비교하여 성능을 검증하였다. 각 수신기의 위치 해 출력 결과로부터 위치오차를 비교하였으며 보정정보를 적용함으로써 향상된 위치해가 출력됨을 확인하였다.

I think the spirit of the introduction of the testimony system of investigators, is in order to prevent, it is possible, among other things, what happens to overturn sentence unfair of witness or defendant, the absurd result, to deal effectively with this. If you look at the relevant case law of the testimony system after the introduction of the investigators, the main material used to determine the presence or absence of special guarantees of trustworthiness associated with the testimony of investigators. If there is participants at the time, it is possible to mention his statement, a description of statement was created in the course of the investigation. Therefore, in order to be recognized innocuously the special guarantees of trustworthiness from the perspective of law enforcement, it or enlist a person or trusted counsel in the course of the investigation, to record the all process of investigation is most preferred and counsel or if the video recording research and participation of people with a trust relationship has not been made, and that along with the testimony itself of investigators, will be discussed in a comprehensive manner, such as the description of the written statement and assertion of the accused, the presence or absence of special guarantees of trustworthiness, it is necessary to judge. And, by notifying explicitly whether the certification of special guarantees of trustworthiness associated with the testimony of the investigator in the course of the trial, so as to additional proof activities for inspection, by this, the court, a sufficient psychological it is necessary while securing the article must determine the adoption of evidence.

최근 도시화 및 기후변화에 의한 홍수피해의 증가로 인하여 이에 대응하는 방안으로 저영향개발(LID) 요소기술에 관하여 다양하게 개발이 되고 있다. 하지만 이러한 요소기술에 대한 효율을 검증할 수 있는 표준화된 검증방법 및 기기는 부재한 실정이다. 본 연구에서는 LID 기법에 대한 물순환의 효율성 검증이 가능한 강우-유출 모의장치를 개발하였다. 소유역 내 강우가 균등하게 분사될 수 있도록 강우공간분포실험 및 유입유량-유효우량 관계 실험을 통하여 강우를 검증하고 유입되는 강우와 이로 인해 발생되는 침투 및 지표유출 관계 실험을 실시하였다. 그 결과 노즐의 종류에 따른 적정유량범위와 RPM의 관계를 정리하였으며 강우-유출 모의장치를 이용한 실험을 통해 투수면과 불투수면에서의 강우 시의 수문학적 물순환(지표유출, 중간유출, 침투량)의 관계를 정량적으로 검증하였다.

For the water content measurement in thr unapproachable site, moisture content monitering sensor was developed. It was compared with another conventional sensor and verified according to the standard procedures proposed in this study. The proposed standard procedures was also modified using data analysis through laboratory test.

The next generation small satellite-1 (NEXTSat-1) program has been kicked off in 2012, and it will be launched in 2016 for the science missions and the verification of space core technologies. The payloads for these science missions are the Instrument for the Study of Space Storms (ISSS) and NIR Imaging Spectrometer for Star formation history (NISS). The ISSS and the NISS have been developed by Korea Advanced Institute of Science and Technology (KAIST) and Korea Astronomy and Space science Institute (KASI) respectively. The ISSS detects plasma densities and particle fluxes of 10 MeV energy range near the Earth and the NISS uses spectrometer. In order to verify the spacecraft core technologies in the space, the total of 7 space core technologies (SCT) will be applied to the NEXTSat-1 for space verification and those are under development. Thus, the operation modes for the ISSS and the NISS for space science missions and 7 SCTs for technology missions are analyzed for the required operation time during the NEXTSat-1’s mission life time of 2 years. In this paper, the operational concept of the NEXTSat-1’s science missions as well as the verification of space core technologies are presented considering constraints of volume, mass, and power after launch.

FDS(Fire Dynamics Simulation)은 미국의 NIST가 연소 및 건축불의 화재를 수치해석적으로 해석하기 위해 1980년대부터 개발을 시작해 현재까지 version 6 까지 발표하면서 성능과 기능을 개선해 오고 있는 공개용 코드이다. 하지만 version 5 까지 FDS 코드가 사용한 LES난류모델은 가장 고전적인 형태의 LES모델을 사용하였기 때문에 대형 건축물의 화재해석에 많은 오차가 발생하고 있음이 꾸준히 지적되어왔다. 이로 인해 최근에 발표된 version 6에는 기존의 LES모델을 포함하여 3개의 LES모델이 추가되어 정량적 신뢰성을 강화한 것으로 평가되고 있다. 본 연구에서는 FDS에서 제공하고 있는 4개의 LES 난류모델에 대하여 평판유동 및 평판위의 입방체 주위의 압력분포를 분석하고 비교하여 각 난류모델의 특성과 신뢰성을 검증하고자 하였다.

건물의 풍진동을 모니터링 하기 위해, 두 개 (이동국과 기준국)의 global positioning system (GPS)에 기반한 종래의 real-time kinematic (RTK) 기법이 널리 적용되고 있다. 그러나 이는 기준국을 위한 공간을 확보하거나 유지 관리하는데 어려움을 겪을 수 있다. 한편, 최근에 하나의 이동국 만을 이용하여 구조물의 움직임을 계측할 수 있는 새로운 virtual reference station (VRS)-RTK 기법이 개발되었으며, 측량 분야에서 널리 사용되고 있다. 본 연구에서는 골조 구조물의 횡방향 구조 응답을 모니터링하기 위한 VRS-RTK 기법의 적용성을 평가하기 위해 단층 골조 모형 (1차 고유진동수 : 1 Hz)과 3층 골조 모형 (1차 고유진동수 : 0.85 Hz)의 자유진동 실험을 수행하였다.GPS에 의해 계측된 변위 및 가속도 응답의 신뢰성을 평가하기 위해, 레이져 변위계와 가속도계가 설치되었으며, 이들로부터 얻은 계측값을 GPS의 계측값과 비교하였다. 또한, 건물의 지속적인 모니터링을 위한 적절한 계측 샘플링 수를 파악하기 위해, 변위 응답에서의 오차가각기 다른 GPS 샘플링 수 (5, 10, 20 Hz)에서 평가되었다. 실험 결과, GPS으로부터 얻은 변위 및 가속도 응답은 레이져 변위계와 가속계로부터 얻은 응답과 좋은 유사 관계를 가지는 것을 확인하였다. 그리고, GPS 샘플링 수가 증가할수록 변위 오차는 감소하였으며, 3층 실험체에 대해서는 20 Hz의 GPS 샘플링 수로 구조물의 전 모드 성분 (1, 2, 3차 모드)을 검출할 수 있었다.

According to the test result with a non-seismic reinforced concrete specimen with one span and one story, it was considered that the method of simply measuring a story drift ratio using a sinker was comparatively effective for comparatively damaged members when evaluating the post-earthquake safety of buildings.

In this study, after performing a full-scale dynamic testing of unreinforced masonry buildings, the experimental results and developed seismic performance evaluation program of existing unreinforced masonry buildings were verified by comparing the results of the program.

The objective of this research is to verify the code–specified girder distribution factors (GDF) for continuous steel girder bridges by field testing. it is found that the analysis results are not conservative, and in some instance, the analytical results underestimate the actual GDF’s, which can lead to a groundless notion of safety. As a result, it is found that GDF’s specified in AASHTO LRFD should be used with careful reservation.

A method to measure rheological properties of cementitious materials through mini slump test has been previously suggested. In this study, experiments were performed to verify that method. As the mini slump test proceeds, the spreading diameter of the material were measured by using a digital image processing technique. From the measured spreading diameter versus time curve, the rheological properties were estimated and compared to the properties measured from the viscometer.

The main purpose of this study is to develop the advanced structural health monitoring techniques of cable-supported bridges. The research and development about two main topics has been performed as follows: The vision-based cable monitoring technology using cable moving robot and The long-term displacement monitoring technology of bridge structures using Global Navigation Satellite System (GNSS). Therefore, the 100-m-length cable vibration test facility, was selected as the test bed.

In this study, the 3D-analysis of multi-functional fishway with square form of underground passage and circle type of underground passage are carried out by SAP2000 soft ware. In case of width 2m, 1m of vertical cross-section structure, the width 300mm× length 300mm and the width 1,000mm× length 400mm of square type were experimental parameters. The structural analysis results show stress of square form passage for water pressure alleviation by % compared to that of a square form passage. The stability of square type of concrete is more beneficial than that of circle type of concrete.

For the study of population genetic structure with mtDNA, it is essential to measure genetic diversity at each mtDNA regions. Also, to evaluate the variation according to the each region should follow as well as to see if there are differences. In this study, we delved into the variations and dendrogram among samples of seven mtDNA regions (NDⅡ, NDⅤ, NDⅣ, NDⅣL, NDⅥ, NDⅠ, 12SrRNA) from wild Pacific abalone, Haliotis discus hannai collected in Yeosu, Korea. The region with the highest genetic variation was NDⅣ region (Haplotype diversity = 1.0000, Nucleotide diversity = 0.010823) with two to five times higher variation than the others. Furthermore, the study to see if there is a difference between the regions of samples showed that similar aspects of dendrogram in NDⅡ and NDⅠ(divergence of 90% and 87%), which forms a group with hd4, 7, 8 and 10 at bootstrap support, based on 1000 replications. Also, pair-wise FST between clusters within the regions showed high values; 0.4061 (P=0.0000), 0.4805 (P=0.0000) respectively. Therefore we can infer that it is the most efficient and accurate way to analyze the region of NDⅣ with the highest variation in addition to the regions of NDⅡ and NDⅠ, which formed clusters with high bootstrap value, for study of population genetic structure in this species.

In case of reinforced concrete based structures, deterioration is mainly due to corrosion of steel rebar. So, the advanced construction rebar materials which have high resistance to corrosion should be developed with the application techniques. In Korea Institute of Construction Technology, the research project on hybrid reinforcing bars have performed since 2013 during 5 years. In this paper, the verification methodologies on corrosion and durability which will be applied to developed hybrid reinforcing bars are suggested

The purpose of this study is to verify a RCS strengthening method for Medium & Low-rise R/C buildings using the nonlinear analysis. In this study, a three-story R/C building that represents a typical Korean school constructed in the 1980s was selected. Seismic capacities of the building before and after RCS strengthening are evaluated based on the nonlinear static and dynamic analyses.

The double frame system is composed of existing structure, external retrofit frame and hysteretic steel dampers installed between former two components. The DFS retrofit system dissipates the energy by plastic deformation of steel damper caused by relative displacement due to the differences in stiffness, weight, and eigenperiod of each components. The dynamic test with shaking table was performed to verify the seismic performance of the proposed DFS system