In August 2014, a large sinkhole with width of 2.5m, depth 5m, and length 8m was discovered in Seoul followed by an additional 5-8m, 4-5m, 70m the center Seokchon underground driveway

All pedestrian vehicle collision fatalities to children less than five years of age in Washington State were evaluated for a five-year period using State death certificates, coroners' reports, and police records. Although the majority of pedestrian fatalities to older children have been shown to be due to "dart-outs" into traffic with the child being struck by an oncoming car, pedestrian fatali...

In this study, a series of instances of children injured by a motor vehicle set in motion by an unsupervised child are reviewed. During a 24-month period, nine such children were identified through a multihospital and coroner's office monitoring system in a single urban county. Injuries ranged from multiple abrasions and contusions to serious leg and head injuries. Three children died. The typi...

Displays and Real Devices In the earlier versions of the program all the development work was done exclusively on a graphic display, and the "pen" was handled as an abstract, dimensionless entity without real-world constraints upon its movements. Conceptually, however, I always thought of the problem of moving the pen from point A facing direction alpha, to point B facing direction beta, as bei...

In the face of increasing urbanization, there is growing interest in application of microscale hydrologic solutions to minimize storm runoff and conserve water at the source. In this study, a physically based numerical model was developed to understand hydrologic processes better at the urban residential scale and the interaction of these processes among different best management practices (BMP...

This study compared the quality and quantity of stormwater runoff from replicated asphalt, permeable paver, and crushed-stone driveways. Rainfall was measured on-site and runoff was recorded using tipping buckets. Flow-weighted composite runoff samples were analyzed weekly for total suspended solids, total Kjeldahl nitrogen, nitrate-nitrogen, ammonia-nitrogen, total phosphorus (TP), zinc, lead,...