Jean Cheng

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Wavelets on the closed interval are constructed step by step from the Daubechies' wavelets with compact supports. We follow mostly the guidelines by Andersson, Hall, Jawerth and Peters, with modiications on the construction of \edge" wavelets. Then we construct the lter operators discussed by Cohen, Daubechies and Vial. A ltering process is suggested for(More)
A bezoar is a mass found trapped in the gastrointestinal system. The condition may be associated with pica, especially in developmentally retarded children. Clinical manifestations are usually nonspecific. Endoscopic diagnosis and removal of the foreign materials is often indicated. Occasionally, severe complications may occur. We report two cases to(More)
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