Chisang You

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Human enamel and dentin were prepared with an air abrasion unit (KCP-2000), using two particle sizes (27 micrometers and 50 micrometers) of aluminum oxide. In vitro tensile bond strengths of a composite resin were determined after three enamel and three dentin surface treatments. Enamel treatments were: air abraded only, E-1; air abraded + adhesive, E-2;(More)
The study evaluated the tensile bond strength between human enamel and seven compomer restorative systems under different bonding conditions. Seven compomers were bonded to human tooth structure with and without phosphoric acid etching of the bonding surface, with and without the use of their recommended combined primer and bonding agent and with both moist(More)
PURPOSE To determine the in vitro bond strengths of seven compomer/bonding agent restorative systems to human dentin. MATERIALS AND METHODS Seven compomer/bonding agents were bonded to human dentin, stored in water at 37 degrees C for 24 hours, and debonded in tension. Bonding conditions were with and without phosphoric acid etching, with and without the(More)
In the recent years, the need for improved structural efficiency and mechanical/electrical performance for the antennas, especially for aircraft applications, has led to their embedding of the functions and components in load-bearing structural surfaces for aircraft applications [1-3]. The use of a composite roof structure in military vehicles with multiple(More)
The effect of multilayer geometry on microstrip antennas is investigated for the design of antenna-integrated mechanical structure. Changes in the gain of antenna due to the geometry have been determined using a transmission line analogy. Design of high-gain antenna in bandwidth is proposed away from structural resonance. Experiments are done on microstrip(More)
The successful use of a Design of Experiments (DOE) and Response Surface Methods (RSM) approaches in a simultaneous electrical and mechanical optimization study for a load-bearing antenna structure is presented. The benchmarking geometry is a stacked patch antenna integrated in a sandwich structure made of composite laminates and Nomex honeycomb. The(More)
In this paper, one structurally integrated composite antenna array conformed around cylindrical structures has been designed and fabricated. The experimental results show that the radiation pattern is strongly dependent on the cylinder curvature, while the array also exhibits high side-lobes and wider beamwidth. The results of impact test indicate that the(More)
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