Bayesian Prediction of Pre-Stressed Concrete Bridge Deflection Using Finite Element Analysis.

Vertical deflection has been emphasized as an important safety indicator in the management of railway bridges. Therefore, various standards and studies have suggested physics-based models for predicting the time-dependent deflection of railway bridges. However, these approaches may be limited by model errors caused by uncertainties in various factors, such as material properties, creep coefficient, and temperature.

Long-Term Deflection Prediction from Computer Vision-Measured Data History for High-Speed Railway Bridges.

Management of the vertical long-term deflection of a high-speed railway bridge is a crucial factor to guarantee traffic safety and passenger comfort. Therefore, there have been efforts to predict the vertical deflection of a railway bridge based on physics-based models representing various influential factors to vertical deflection such as concrete creep and shrinkage. However, it is not an easy task because the vertical deflection of a railway bridge generally involves several sources of uncertainty.

Computer Vision-Based Structural Displacement Measurement Robust to Light-Induced Image Degradation for In-Service Bridges.

The displacement responses of a civil engineering structure can provide important information regarding structural behaviors that help in assessing safety and serviceability. A displacement measurement using conventional devices, such as the linear variable differential transformer (LVDT), is challenging owing to issues related to inconvenient sensor installation that often requires additional temporary structures. A promising alternative is offered by computer vision, which typically provides a low-cost and non-contact displacement measurement that converts the movement of an object, mostly an attached marker, in the captured images into structural displacement.

Trends in water- and foodborne disease outbreaks in Korea, 2007-2009.

Objectives: In Korea, every outbreak of acute gastroenteritis in two or more patients who are epidemiologically related is investigated by local public health centres to determine causative agents and control the outbreak with the support of the Korean Centers for Disease Control and Prevention. The findings and conclusions of each outbreak investigation have been summarized annually since 2007 to make reports and statistics of water- and foodborne disease outbreaks.

Methods: All outbreaks reported to Korean Centers for Disease Control and Prevention from 2007 to 2009 were included in the study.

Delayed intra-articular inflammatory reaction due to poly-L-lactide bioabsorbable interference screw used in anterior cruciate ligament reconstruction.

Bioabsorbable interference screws have replaced metal interference screws in anterior cruciate ligament reconstruction surgery because they have several advantages. Poly-L-lactide (PLLA) is one of the commonly used materials for bioabsorbable interference screws. PLLA produces a lower inflammatory reaction than polyglycolide as a result of its slower degradation rate and better biocompatibility.