Browsing by Author "Kwong, Brian"
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Item ADVANCED SHADOW MOIRE WITH NON-CONVENTIONAL IMAGING ANGLES(2012) Kwong, Brian; Han, Professor Bongtae; Mechanical Engineering; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)With the increasingly smaller electronic package size, warpage of electronic packages becomes an important measurement related to the reliability of the products. Higher sensitivity out-of-plane deformation techniques are required to capture the smaller deformations of tiny packages for enhanced design analysis and model verification. The higher sensitivity is realized using non-zero viewing angles with the conventional shadow moiré technique. Advanced configurations to accommodate the non-zero viewing angles are developed to cope with direct reflection encountered on the conventional setup. An expanded governing equation for the configuration is derived and verified experimentally. Then the proposed configuration was implemented in the testing of an actual package to demonstrate the advantages that accrue from the higher sensitivity.Item Real-time decision aid display(2011) Au, Jennifer; Bonomo, Anthony; Freyman, Laura; Kwong, Brian; Li, Benjamin; Lieberman, Jessica; Mkrtchyan, Levon; Price, Michael; Skoda, Andrew; Tellers, Mary; Tomaschko, Andrew; Wu, Johnny; Mowrer, Frederick W.Fire sensor systems effectively monitor the state of the building, detect fire, and alert occupants in the event of an emergency. However, fire sensor technology is limited in its ability to convey information to firefighters. Even though all of the necessary information can be obtained through Fire Annunciator Control Panels (FACPs), it is difficult to use them to track the progression of fire. We designed and prototyped a decision aid system to illustrate our approach to this problem. Our goal was to create a tactical decision aid display that can present building information through an intuitive interface in real time. We used previous research on the information needs of firefighters in designing the interface. Our key insight was to use a floor plan with a sensor information overlay to organize information. We implemented a prototype that interfaces with FACPs using existing facilities systems management communication protocols.