Talha Jamal Ahmad

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This paper describes design principles to design and develop a transcutaneous link for medical implants using inductively coupled coils. Parameters which optimize link efficiency have been discussed in the light of previous studies and a simple design methodology to find optimized parameters for Class E amplifier and inductive coils is outlined. Paper also(More)
Design of an optimized RF transcutaneous link through inductive coils is an arduous design process which involves complex mathematical modeling to search for optimized design parameters. This paper presents a generalized model which encompasses all possible voltage driven circuit realizations of an inductive link and presents a comparison on the bases of(More)
Glucocorticoids are often recommended along with oral antifungals in the treatment of kerion celsi. In this randomized study, the efficacy of combination therapy with oral griseofulvin and oral prednisolone (n =17) was compared to oral griseofulvin alone (n=13) in the treatment of kerion celsi. Both groups were treated with oral griseofulvin for 8 weeks(More)
A simple yet flexible research module for laboratory experiments in evaluating performance of different speech processing strategies of Cochlear Implant is developed. It enables algorithm development and evaluation through a series of three sub-modules. Software Evaluation Module provides a graphical environment to the researchers to develop new strategies(More)
Continuous Interleaved Sampling (CIS) is one of the most useful and famous speech processing strategies used in Cochlear Implant speech processors. However, algorithm realization in hardware is a laborious task due to high computation cost of the algorithm. Real-time issues and low-power design demands an optimized realization of algorithm. This paper(More)
This paper presents design overview of a low cost prototype of Cochlear Implant developed from commercial off-the-shelf components. Design scope includes speech processing module implemented on a commercial digital signal processor, transcutaneous data and power transceiver developed from a single pair of inductive coils and finally a stimulator circuitry(More)
This paper proposes a novel approach for the classification of phonocardiograms based on statistical properties of the PCG signal energy envelograms using fuzzy inference system. Fuzzification of features is done to remove absolute boundaries and assign a degree of association to every segment of the signal with the corresponding heart sound. Since heart(More)
This paper discusses the effect of atrioventricular conduction time (AVCT) on the short-term Heart Rate Variability (HRV) by computing HRV parameters using intervals between the onsets of successive P waves (PP time series) for three groups: normal, arrhythmia and sudden cardiac death (SCD) patients. A very precise wavelet transform based ECG delineator was(More)
Various segmentation algorithms have been proposed for better classification of the highly nonstationary heart sounds. This paper proposes an improved segmentation technique based on Shannon Energy calculation of the phonocardiogram using adaptive windows. The major focus of the research has been on a simple yet comprehensive signal representation as well(More)
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