1996년 여름 제주도 서쪽 해안에서 전에 볼 수 없을 정도로 유용 대형저서동물이 대량으로 죽어, 전복, 오분자기, 소라, 해삼, 말똥성게에 큰 피해를 주었다. 제주도 해안에서 식물플랑크톤 대발생은 없었고, 대량폐사가 일어나기 전에 해안에서 표층 저염수가 나타났기 때문에 저염분 스트레스가 대량폐사에 결정적인 영향을 미쳤을 것으로 여겨진다. 같은 기간 관측된 강수량이 적어, 강수량으로 저염화를 설명하지 못한다. 국립수산진흥원(1997)이 관측한 자료는 1

We are observing the cracking condition of HPC pavement. We used ultrasonic equipment and 3D GPR equipment to inspect cracks. The depth and the deterioration of cracks were good during observation. We are going to observe the crack with caution.

We know that the failure of high performance concrete pavement occurs in the aspects of its structure, environment, material, and construction. We have been able to identify the reason why no construction should be permitted when average daily temperature is below 4 degree celsius. We must pay careful attention to the curing management and comply with the standards of concrete production and construction.

A fatigue crack occurred in the vicinity of the center-stay area is generated. Therefore, the stress and caused of occurrence of each member are analyzed by measurement. When similar cases occur in the future, they shall be utilized as basic data such as research methods and establishment of mesures for maintenance.

When estimate Short Lenth External Tendon's tension by Vibration Measurement Method, We Consider Tendon's Boundary. This paper is a case about estimation of short lenth tendon's tension by using practical formula estimation and stiff string with clamped-clamped boundary conditions.

Space took place between two superstructures of which two bridges are adjacent each other. The cause of space between superstructures turn out to be due to several reason such as stratum composition by various ground condition, ground stability after completion of structure, ground stress bulb double, etc.

전국적으로 의복을 제외한 섬유제품 제조업체 현황은 2012년 기준으로 7,155개에 이르며, 여기에서 발생되는 폐섬유 발생은 총 69,000톤/年으로 많은 폐기물이 발생하는 것으로 나타났다. 최근 재활용에 대한 인식이 높아지면서 폐섬유의 재활용 비율이 60% 정도로 나타나고 있으나, 생활용 섬유 자재에 경우는 재활용 비율이 극히 미약한 것으로 나타나고 있으며, 공정상에 발생하는 부산물 및 폐기물은 대부분 전량 폐기하거나 소각하는 것으로 조사되었다. 본 기술개발의 배경은 생활용 및 산업용 섬유 자재를 제조하는 공정에서 발생하는 공정 부산물 및 복합 섬유 폐기물을 재활용(Recycle)하는 기술로써, 구체적으로는 그물형태의 폴리에스테르 수세미, 마이크로 패브릭, 복합 스펀지형 수세미 등의 공정에서 발생하는 Loss 및 폐기물을 채취하여 보다 간소한 공정과 저렴한 비용으로 재활용(Recycle)하여 가정용 및 산업용에 다양하게 적용할 수 있는 Wiping 제품을 개발하여 상품화를 전개하는 기술이다. 폐기물 시트의 입자간 결합을 위한 Binding 및 Cross Linking 기술을 적용하여 재활용 와이핑 제품의 내구성 및 용도에 적합한 강도를 유지하기 위한 결속을 하고, 와이핑 용도 및 형태 안정화를 위한 후 가공을 통한 와이핑의 형태 안정화와 완성 폼을 형성하기 위한 Pressing이다. 상기의 기술개발을 통하여 생활용 섬유제품 제조현장에서 발생하는 폐기물을 저감시키고, 이 폐기물을 재활용(Recycle)을 위하여 고효율 및 생산성이 확보된 설비 제작 및 기술개발을 통해 새로운 부가가치 제품개발 및 원가경쟁력을 확보하고자 한다.

Vibration measurement analysis and In-depth inspection were carried out to understand the cause of defects occurred on joint of bridge. A cause of defects, such as metallic sounds, water leak&corrosion and rubber seal rupture turn out to be due to deterioration and vibrating impact by period so that the bridge is in need of repair and effective maintenance.

In general, the lateral resistant of bearing in a straight bridge is designed for lateral load such as wind or seismic forces. In this study, however, it is found that the cause of damage of bearings in a straight bridge adjacent to the curved road is the centrifugal force or the breaking force of the vehicle. Also, it is suggested that the repair method for the damaged bearings.

In general, the lateral resistant of bearing in a straight bridge is designed for lateral load such as wind or seismic forces. In this study, however, it is found that the cause of damage of bearings in a straight bridge adjacent to the curved road is the centrifugal force or the breaking force of the vehicle. Also, it is suggested that the repair method for the damaged bearings.

The objective of this study introduce improperly welded Vertical stiffner. Function of vertical stiffner is prevent buckling of web pannel. If Vertical stiffner have some defect, it Should be reviewed structural perspective. And Avoid immediate repair through structural review.

Nonlinear seismic evaluation of RC building usually needs much time and man power, In this study, several computational modules were applied for evaluation of existing RC buildings. To investigate the effect of applied modules on time, seismic performance evaluation of example building was performed and the man power input was compared with conventional process.

Failures of curved bridge have been occurred due to the negative reactions in construction and in survice and this problem has been issued in our society. In this study, the strengthening method of curved bridge which was occured negative reactions was investigated through the structural stability analysis.

The purpose of this study is to measure the abnormal behavior of the bridge with LRB and to analyze the cause. Based on the result of analysis, the abnormal behavior was mainly due to the absence of pre-set process during replacement and the integrated behavior due to constriction of adjacent RAMP.

The present work has been devoted to the catalytic reduction of N2O by H2 with Pt/SiO2 catalysts at very low temperatures, such as 110oC, and their nanoparticle sizes have been determined by using H2-N2O titration, X-ray diffraction(XRD) and high-resolution transmission electron microscopy(HRTEM) measurements. A sample of 1.72% Pt/SiO2, which had been prepared by an ion exchange method, consisted of almost atomic levels of Pt nanoparticles with 1.16 nm that are very consistent with the HRTEM measurements, while a Pt/SiO2 catalyst possessing the same Pt amount via an incipient wetness technique did 13.5 nm particles as determined by the XRD measurements. These two catalysts showed a noticeable difference in the on-stream deN2O activity maintenance profiles at 110℃. This discrepancy was associated with the nanoparticle sizes, i.e., the Pt/SiO2 catalyst with the smaller particle size was much more active for the N2O reduction. When repeated measurements of the N2O reduction with the 1.16 nm Pt catalyst at 110oC were allowed, the catalyst deactivation occurred, depending somewhat on regeneration excursions.

In this paper, we discuss a service to give alarm in the case of emergency for the old and the weak by human behavior recognition in Intelligent Space. Our Intelligent Space consists of mobile robots, sensors and agents. Agent analyzes data acquired from networked devices and determines tasks of robot and space to provide a service for humans. In our emergency alarm service, human behavior recognition service module analyzes accelerometer data obtained from body-attached human behavior sensing platform, and classifies into four basic human behavior such as "walking", "running", "sitting" and "falling-down". For the old and the weak, "falling-down" behavior may bring about dangerous situations. On such an occasion, emergency alarm service is executed automatically and a selected mobile robot approaches fallen person quickly and then send images of the person to guardians. In this paper, we set up a scenario to verify the emergency alarm service in Intelligent Space, and show feasibility of the service from our simulation experiments.

강변여과는 강물을 강변의 충적대수층에 통과시켜 지층의 자체정화능력을 이용하여 오염물질을 상당량 저감시킨 후 양수하는 방식이다. 국내에서는 대부분의 원수를 지표수에서 취수하여 사용하고 있는 실정이나, 오염물질의 증가로 인하여 지표수를 원수로 사용하기가 점점 어려워지고 있다. 강변여과를 이용하여 양질의 원수를 확보하기 위해서는 오염물 이동에 관한 이해가 중요하다. 본 연구에서는 대수층에 용존성 유기물질(DOM)과 박테리아가 동시에 존재할 경우를 대상으로 대