Ebrahim Ghafar-Zadeh

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This paper describes a new technique to measure urine volume in patients with urinary bladder dysfunction. Polypyrrole - an electronically conducting polymer - is chemically deposited on a highly elastic fabric. This fabric, when placed around a phantom bladder, produced a reproducible change in electrical resistance on stretching. The resistance response(More)
The paper presents the design and implementation of a complementary metal-oxide semiconductor (CMOS) based integrated sensor system employing bacteriophage or phage organisms as recognition elements to detect deadly bacteria such as E-Coli and Salmonella. The system works on the basis of monitoring the changes in capacitance signals caused when the target(More)
Micro- and nanoscale engineering approaches in medicine have the potential to recreate physiologically relevant stem cell microenvironments to enhance our understanding of stem cell behaviour and bring stem cell therapy closer to fruition. The realization of such advancements will impact a number of therapeutic applications, the most immediate of which may(More)
This article presents an image processing approach dedicated for a blind mobility aid facilitated through visual intracortical electrical stimulation. The method examines a display framework based on the distances related to a scene. The distances of objects to the walker are measured using a size perspective method which uses only one camera without any(More)
A hybrid microfluidic/IC capacitive sensor is presented in this paper for highly integrated lab-on-chips (LoCs). We put forward the design and implementation of a charge based capacitive sensor array in 0.18-mum CMOS process. This sensor chip is incorporated with a microfluidic channel using direct-write microfluidic fabrication process (DWFP). The design,(More)
In this paper, we present a bacteria growth monitoring technique using a complementary metal-oxide semiconductor capacitive sensor. The proposed platform features a differential capacitive readout architecture with two interdigitized reference and sensing electrodes. These electrodes are exposed to pure Luria-Bertani (LB) medium and Escherichia Coli (E.(More)
This paper considers the potential of CMOS-based nanopore measurement systems for high-speed molecular recording and DNA sequencing in particular. As such it approximates the signal fidelity limitations of a CMOS-based nanopore readout channel and discusses the means by which throughput could be increased through the use of a parallel CMOS readout system.
An improved-accuracy algorithm for real-time nanopore-based signal detection (e.g. base calling) is introduced. The approach is based on the cumulative sum technique but employs a decision-directed policy coupled with a post-decision correction mechanism. These additions allow the improved detector to achieve at least a 10× accuracy improvement over(More)