Imran Akhtar

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Numerical simulations have been used to analyze the effect that vortices, shed from one flapping foil, have on the thrust of another flapping foil placed directly downstream. The simulations attempt to model the dorsal–tail fin interaction observed in a swimming bluegill sunfish. The simulations have been carried out using a Cartesian grid method that(More)
Numerical simulations have been used to examine the performance of flapping foils. It is envisioned that these flapping foils will be employed as pectoral fins in a bio-robotic AUV (BAUV) and a detailed parametrization of the hydrodynamic performance of these foils will allow for the development of a high-fidelity dynamical model of the BAUV. In the long(More)
Commercial buildings are the largest single consumer of energy in the United States. Energy efficient buildings will have a significant impact on overall energy consumption and greenhouse gas emissions. Buildings being multi-scale, multi-physics, highly uncertain dynamic systems, its energy efficiency is directly linked with the design and control of(More)
-This paper investigates the problem of speaker identification and verification in noisy conditions, assuming that speech signals are corrupted by noise. This paper describes a method that combines multi-condition model training and missing-feature theory to model noise with unknown temporal-spectral characteristics. Introduction of such technique is very(More)
Reduced-order models have a number of practical engineering applications for unsteady flows that require either low-dimensional approximations for analysis and control or repeated simulation over a range of parameter values. The standard method for building reduced-order models uses the proper orthogonal decomposition POD and Galerkin projection. However,(More)
1:30 Inexact Solves in Interpolatory Model Reduction, SERKAN GUGERCIN, CHRISTOPHER BEATTIE, AND SARAH WYATT (Department of Mathematics). We expand upon the work of Beattie and Gugercin, who examined the role of inexact solves in the interpolation-based model reduction setting. We show the effect of inexact solves in one-sided and two-sided(More)
Polymerase Chain Reaction (PCR) is a biomedical technique for forensic laboratory sciences in which small amount of DNA is amplified through repeated thermal cycles. It has become a powerful technique for clinical, biological, medical, forensic and genetic analysis and other areas of life science. This process actively increases the quantity of DNA by(More)
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