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Cognitive radio is an enabling technology for efficient utilization of radio spectrum. In this paper, an orthogonal frequency division multiple access (OFDMA) based cognitive (opportunistic) network is considered, which co-exists with a macrocell network through utilizing its unused subcarriers. We particularly consider the uplink opportunity detection problem by the opportunistic network, where accurate...
Finite element method and peridynamic theory are coupled via submodeling approach to investigate the dynamic response and damage in an electronic package subjected to impact loading arising from drop-shock. The global modeling is performed using the finite element method while the peridynamic theory is employed for the submodeling and failure prediction. The analysis yielded the outermost solder joint...
In this study, the loading-unloading data obtained from the nono-indentation tests in combination with the peridynamic simulations are used to determine the elastic modulus and yield stress of the material. A simple search algorithm minimizing the difference between the predicted force- indentation depth and experiments leads to the determination of the material properties. Nano-indentation experiments...
This study presents an application of the peridynamic theory to investigate failure propagation in a multi-layer thin- film structure of electronic packages. A brief description of this non-local theory is presented prior to the statement of the problem. The mathematical description of the theory and its validation by considering a well-known dynamic fracture problem are discussed subsequently. Finally,...
In this study, peridynamic theory is used to investigate dynamic response of electronic packages subjected to impact loading arising from drop-shock. First, the theory is briefly described, followed by validation against a fundamental dynamic fracture problem. Finally, peridynamic theory was demonstrated by considering a drop test experiment.
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