Omran, Hesham; Salama, Khaled N.(2015 IEEE 3rd International Conference on Smart Instrumentation, Measurement and Applications (ICSIMA), Institute of Electrical and Electronics Engineers (IEEE), 2016-09-05)[Conference Paper]
Sapsanis, Christos; Sivashankar, Shilpa; Omran, Hesham; Buttner, Ulrich; Salama, Khaled N.(2015 IEEE 58th International Midwest Symposium on Circuits and Systems (MWSCAS), Institute of Electrical and Electronics Engineers (IEEE), 2015-08-02)[Conference Paper]
We report an agglutination-based immunosensor for the quantification of C-reactive protein (CRP). The developed immunoassay sensor requires approximately 15 minutes of assay time per sample and provides a sensitivity of 0.5 mg/L. We have measured the capacitance of interdigitated electrodes (IDEs) and quantified the concentration of added analyte. The proposed method is a label free detection method and hence provides rapid measurement preferable in diagnostics. We have so far been able to quantify the concentration to as low as 0.5 mg/L and as high as 10 mg/L. By quantifying CRP in serum, we can assess whether patients are prone to cardiac diseases and monitor the risk associated with such diseases. The sensor is a simple low cost structure and it can be a promising device for rapid and sensitive detection of disease markers at the point-of-care stage.
Yang, Yuli; Aïssa, Sonia; Eltawil, Ahmed M.; Salama, Khaled N.(2014 IEEE Global Communications Conference, Institute of Electrical and Electronics Engineers (IEEE), 2014-12)[Conference Paper]
In this paper, a hierarchical cell structure is considered, where public safety broadcasting is fulfilled in a femtocell located within a macrocell. In the femtocell, also known as local cell, an access point broadcasts to each local node (LN) over an orthogonal frequency sub-band independently. Since the local cell shares the spectrum licensed to the macrocell, a given LN is interfered by transmissions of the macrocell user (MU) in the same sub-band. To improve the broadcast performance in the local cell, a novel scheme is proposed to mitigate the interference from the MU to the LN while achieving diversity gain. For the sake of performance evaluation, ergodic capacity of the proposed scheme is quantified and a corresponding closed-form expression is obtained. By comparing with the traditional scheme that suffers from the MU's interference, numerical results substantiate the advantage of the proposed scheme and provide a useful tool for the broadcast design in hierarchical cell systems.
Omran, Hesham; Arsalan, Muhammad; Salama, Khaled N.(Proceedings of the IEEE 2014 Custom Integrated Circuits Conference, Institute of Electrical and Electronics Engineers (IEEE), 2014-09)[Conference Paper]
Zidan, Mohammed A.; Kosel, Jürgen; Salama, Khaled N.(2014 IEEE 57th International Midwest Symposium on Circuits and Systems (MWSCAS), Institute of Electrical and Electronics Engineers (IEEE), 2014-08)[Conference Paper]
In this paper, we present an electrostatic MEMS switch with liquids as dielectric to reduce the actuation voltage. The concept is verified by simulating a lateral dual gate switch, where the required pull-in voltage is reduced by more than 8 times after using water as a dielectric, to become as low as 5.36V. The proposed switch is simulated using COMSOL multiphysics using various liquid volumes to study their effect on the switching performance. Finally, we propose the usage of the lateral switch as a single switch XOR logic gate.
De la Torre, Pedro; Salama, Khaled N.; Berumen, Michael L.(2014 IEEE 57th International Midwest Symposium on Circuits and Systems (MWSCAS), Institute of Electrical and Electronics Engineers (IEEE), 2014-08)[Conference Paper]
A marine acoustic system for underwater target tracking is described. This system is part of the Integrated Satellite and Acoustic Telemetry (iSAT) project to study marine fauna. It is a microcontroller-based underwater projector and receiver. A narrow-band, passive sonar detection architecture is described from signal generation, through transduction, reception, signal processing and up to tone extraction. Its circuit and operation principles are described. Finally, a comparison between the current energy detection method versus an alternative matched filter approach is included.
Ghoneim, Mohamed T.; Zidan, Mohammed A.; Salama, Khaled N.; Hussain, Muhammad Mustafa(2014 14th International Workshop on Cellular Nanoscale Networks and their Applications (CNNA), Institute of Electrical and Electronics Engineers (IEEE), 2014-07)[Conference Paper]
Neuromorphic computer will need folded architectural form factor to match brain cortex's folded pattern for ultra-compact design. In this work, we show a state-of-the-art CMOS compatible pragmatic fabrication approach of building structurally foldable and densely integrated neuromorphic devices for non-volatile memory applications. We report the first ever memristive devices with the size of a motor neuron on bulk mono-crystalline silicon (100) and then with trench-protect-release-recycle process transform the silicon wafer with devices into a flexible and semi-transparent silicon fabric while recycling the remaining wafer for further use. This process unconditionally offers the ultra-large-scale-integration opportunity-increasingly critical for ultra-compact memory.
Naous, Rawan; Zidan, Mohammed A.; Salem, Ahmed Sultan; Salama, Khaled N.(2014 14th International Workshop on Cellular Nanoscale Networks and their Applications (CNNA), Institute of Electrical and Electronics Engineers (IEEE), 2014-07)[Conference Paper]
Gateless Memristor Arrays have the advantage of offering high density systems however; their main limitation is the current leakage or the sneak path. Several techniques have been used to address this problem, mainly concentrating on spatial and temporal solutions in setting a dynamic threshold. In this paper, a novel approach is used in terms of utilizing channel estimation and detection theory, primarily building on OFDM concepts of pilot settings, to actually benefit from prior read values in estimating the noise level and utilizing it to further enhance the reliability and accuracy of the read out process.
Zidan, Mohammed A.; Salem, Ahmed Sultan; Fahmy, Hossam Aly Hassan; Salama, Khaled N.(2014 14th International Workshop on Cellular Nanoscale Networks and their Applications (CNNA), Institute of Electrical and Electronics Engineers (IEEE), 2014-07)[Conference Paper]
Crossbar memristor arrays provide a promising high density alternative for the current memory and storage technologies. These arrays suffer from parasitic current components that significantly increase the power consumption, and could ruin the readout operation. In this work we study the trade-off between the crossbar array density and the power consumption required for its readout. Our analysis is based on simulating full memristor arrays on a SPICE platform.
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