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Simulation and experimental investigation of an energy harvester utilizing flow-induced vibration
Mostafa G. Abd El-Mageed, Mustafa Arafa, and Mohamed Elaraby
[abstract not available]
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Development of a hybrid solar power management unit for mobile platforms
Ahmed A. Abdelmoaty, Amr Helmy, and Yehea Ismail
A hybrid power management unit was developed to interface photovoltaic energy to loads, and meeting its challenges such as variation of power, unregulated voltage and limited power, the unit implements a Maximum Power Point Tracking (MPPT) to maximize the output power under environmental variations. The power management system proposed applies photovoltaic harvested energy effectively to mobile devices. It mainly consists of an MPPT block and a Power Distribution Control Unit (PDCU). Different cases of operation exist depending on the availability of power, load needs, and battery state of charge. Analysis and simulation results are provided to demonstrate system functionality and sensitivity.
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A programmable receiver front-end architecture supporting LTE
Hoda Abdelsalam, Emad Hegazi, Hassan Mostafa, and Yehea Ismail
[abstract not available]
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TMR sensors for reliable S2A architectures
Shereen S. Abouelazayem, Ahmed A. Ibrahim, Mennatallah A. Morsi, Merna N.Abou Eita, and Mostafa W. Hussein
[abstract not available]
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CFD analysis of suction and pressure side film cooling influence on vane aero performance in a transonic annular cascade
Ahmad Alameldin, Lamyaa A. El-Gabry, Jens Fridh, and Ranjan Saha
[abstract not available]
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Social pervasive systems: The harmonization between social networking and pervasive systems
Soumaia Ahmed Al Ayyat
The recent advancement in mobile device sensor technology, coupled with the wealth of structured accessible data of social networks, form a very data-wealthy ecosystem. Such an ecosystem is rich in bi-directional context that can flow between the mobile and social worlds enabling the creation of an elitist breed of pervasive services and applications. We label the breed resulting from the merger as Social Pervasive Systems (SPS). © 2014 IEEE.
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PIPeR: Impact of power-awareness on social-based opportunistic advertising
Soumaia Al Ayyat, Sherif G. Aly, and Khaled A. Harras
[abstract not available]
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A probabilistic MAC for cognitive radio systems with energy harvesting nodes
Ramy E. Ali, Fadel F. Digham, Karim G. Seddik, Mohammed Nafie, and Amr El-Keyi
[abstract not available]
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A pricing-based cooperative spectrum sharing stackelberg game
Ramy E. Ali, Karim G. Seddik, Mohammed Nafie, and Fadel F. Digham
In this paper, we study the problem of cooperative spectrum sharing among a primary user (PU) and multiple secondary users (SUs) under quality of service (QoS) constraints. The SUs network is controlled by the PU through a relay which gets a revenue for amplifying and forwarding the SUs' signals to their respective destinations. The relay charges each SU a different price depending on its received signal-to-interference-and-noise ratio (SINR). The primary relay controls the SUs network and maximize any desired PU utility function. The PU utility function represents its QoS, which is affected by the SUs access, and its gained revenue to allow the access of the SUs. The problem of maximizing the primary utility is formulated as a Stackelberg game and solved through three different approaches, namely, the optimal, the heuristic and the suboptimal algorithms. © 2014 IFIP.
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A fault-tolerant technique to detect and recover from open faults in FPGA interconnects
Gehad I. Alkady, Nahla A. El-Araby, M. B. Abdelhalim, Hassanein Amer, and A. H. Madian
[abstract not available]
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Adaptive low power detection of sparse events in wireless sensor networks
Ahmed S. Alwakeel, Mohamed F. Abdelkader, Karim G. Seddik, and Atef Ghuniem
[abstract not available]
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Exploiting temporal correlation of sparse signals in wireless sensor networks
Ahmed S. Alwakeel, Mohamed F. Abdelkader, Karim G. Seddik, and Atef Ghuniem
[abstract not available]
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Multi-Objective selection of cutting conditions in advanced machining processes via an efficient global optimization approach
Mohamed Aly, Karim Hamza, Mohammed Tauhiduzzaman, Mouhab Meshreki, and Ashraf O. Nassef
[abstract not available]
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How the “Arab Spring†will/can plant the seeds for the Arab community psychologists’ identity
Mona M. Amer
[no abstract provided]
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Testing current mode two-input logic gates
S. H. Amer, A. S. Emara, R. Mohie El-Din, M. M. Fouad, and A. H. Madian
[abstract not available]
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A feedback-soft sensing-based cognitive access scheme with feedback erasures
Ahmed M. Arafa, Karim G. Seddik, Ahmed K. Sultan, Tamer Elbatt, and Amr A. El-Sherif
[abstract not available]
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Optimal power allocation for layered broadcast over amplify-and-forward relay channels
Mohamed Adel Attia, Mohammad Shaqfeh, Karim Seddik, and Hussein Alnuweiri
[abstract not available]
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Submicron-integrated plasmonic power splitter
Marina Ayad and Mohamed A. Swillam
Using plasmonic waveguide for interconnects application is very promising direction to achieve high density integration a good size compatibility with electronic devices. Thus, proposing compact and efficient functional plasmonic devices is or prime essential to achieve the required system functionalities. Power splitters are widely used as one of the important component of the optical interconnects and integrated photonic and plasmonics devices. We propose a simple, ultra compact and wideband balanced power divider. The advantage of this device is compactness and ability to split the power over wideband with negligible imbalance. The device is based on plasmonic slot waveguide configuration and has submicron total foot print. To achieve the proposed optimized design, a simple and novel analytical model is utilized for modelling the behavior or any plasmonic structure using circuit model. © 2014 SPIE.
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Tunable nanoscale-effecient plasmonic demultiplexers
Abdulilah Azzazi and Mohamed A. Swillam
The importance of wavelength division demultiplexers (WDM) reside in its aggressive use in many areas of industry which are based on signal processing, especially in the fields of telecommunications, optical computing, integrated photonics circuits and sensing applications. Plasmonic wavelength division demultiplexers are essential component for on chip nanoscale plasmonic systems. In this work, we present nanoscale plasmonic wavelength-selective demultiplexer based on feedback resonator. The devices are based on a thin layer of silver with waveguides etched onto it having small foorprint. These devices can be easily tuned to any specific wavelength in the IR range. © 2014 SPIE.
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Energy-aware scratch-pad memory partitioning for embedded systems
Florin Balasa, Noha Abuaesh, Cristian V. Gingu, Ilie I. Luican, and Doru V. Nasui
Hierarchical memory organizations are used in embedded systems to reduce energy consumption and improve performance by exploiting the non-uniformity of memory accesses and assigning the frequently-accessed data to the low levels of memory hierarchy. Moreover, within a given level, energy can be further reduced and performance further enhanced by memory partitioning - whose principle is to divide the address space in several smaller blocks and to map these blocks to physical memory banks. Scratch-pad memories (SPMs) offer a good compromise - as on-chip storage in embedded systems - when taking into account performance, energy consumption, and die area. This paper addresses the problem of optimizing the partitioning of SPMs. Different from previous techniques, the cost function takes into account all the three major design objectives - energy consumption, performance, and die area, letting the designers decide on their relative importance for a specific project. The proposed approach proved to be computationally fast and very efficient when tested for several data-intensive applications, whose behavioral specifications contain multidimensional arrays as main data structures. © 2014 IEEE.
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Leakage-aware scratch-pad memory banking for embedded multidimensional signal processing
Florin Balasa, Noha Abuaesh, Cristian V. Gingu, and Doru V. Nasui
Partitioning a memory into multiple banks that can be independently accessed is an approach mainly used for the reduction of the dynamic energy consumption. When leakage energy comes into play as well, the idle memory banks must be put in a low-leakage 'dormant' state to save static energy when not accessed. The energy savings must be large enough to compensate the energy overhead spent by changing the bank status from active to dormant, then back to active again. This paper addresses the problem of energy-aware on-chip memory banking, taking into account - during the exploration of the search space - the idleness time intervals of the data mapped into the memory banks. As on-chip storage, we target scratch-pad memories (SPMs) since they are commonly used in embedded systems as an alternative to caches. The proposed approach proved to be computationally fast and very efficient when tested for several data-intensive applications, whose behavioral specifications contain multidimensional arrays as main data structures. © 2014 IEEE.
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On the stability of random access with energy harvesting and collision resolution
Ahmed M. Bedewy, Karim G. Seddik, and Amr A. El-Sherif
[abstract not available]
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Novel luminal spatiotemporally localized waves
Ioannis M. Besieris and Amr M. Shaarawi
[abstract not available]
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