Mathematical Modeling: The Formosan Landlocked Salmon

Written by Laurie Battle, Professor of mathematics, Montana Tech Saturday, 28 February 2015 11:21
     In recent decades, dam removal has become a frequently-used strategy for restoring natural stream habitats because dams deteriorate river channels and often lead to decreased diversity of species. Taiwan has many short and steep rivers in the high mountains, where strong rainfall creates high water velocity. As a result, the government constructed many check dams to prevent the collapse of riverbanks and to lessen sediment transport to lower elevations. As of 1999, Taiwan had over 3,000 check dams.        The Chichiawan Stream and its tributaries in central Taiwan are the last refuge of the Formosan salmon. Dam…

Smart Sensors for Safer Bridges: An International Collaborative Effort

Written by Kenneth Loh 羅健晃 Tuesday, 24 February 2015 19:52
  Bridge Scour      The erosion of soil, sand, and riverbed materials near bridge foundations due to flowing water (or wind in some cases) is a phenomenon known as bridge scour. Despite our awareness of its occurrence, bridge scour remains one of the deadliest causes of overwater bridge failures worldwide, particularly in the United States and in Taiwan.         For instance, a notable scour-induced bridge collapse in the United States was the Schoharie Creek Interstate Highway Bridge incident in Mohawk River, New York, which happened in April 1987. The 32-year-old bridge collapsed due to extensive flood-induced scouring…
    Introduction   Gastric cancer is the fourth most-common cancer worldwide and is also the second-largest cause of cancer death. Early detection and prompt treatment remain the best measure to improve patient survival rates. Recent advances in endoscopy technologies, including magnification and narrow-band imaging (NBI), provide clinical doctors with new tools for the early detection of abnormal lesions in the stomach by demonstrating abnormal mucosal surface morphologies. However, the current practice of endoscopy magnification and NBI rely heavily on clinical doctors’ own experiences. Moreover, the meticulous examination of each frame of magnified images in the whole stomach can be…
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