An online context-aware mechanism for computation offloading in ubiquitous and mobile cloud environments

The Journal of Supercomputing - In ubiquitous environments today, there are numerous sensors that generate a large amount of data. The results of processing this massive data can be applied through...     

Oxidative and non-oxidative degradation pathways of L-ascorbic acid

L-Ascorbic acid (AA) is an essential component for organisms and is responsible for various functions in the human body. Its structure is in a way that suffering significant structural changes during storage. Herein, the stability of L-ascorbic acid aqueous solution at various thermal (25 and 90 °C ± 2) and atmospheric oxygen or argon was monitored by optical rotation changes as a function of time intervals. Under oxygen, specific optical rotation [α] of the solution was decreased from + 22.0 to + 2.0 after 32 days and under argon + 11.5 after 9 months at 25 °C. The loss of [α] increased at 90 °C under both oxygen and argon atmospheres. Subsequently, the obtained reaction mixtures were evaporated to dryness and analysed by FT-IR, ¹H-NMR and GC-MS techniques. Results of these analyses indicate that AA was decomposed to a complex mixture of reaction products.     

Analysis of Side Information Impact on the Coverage Region of Wireless Wiretap Channel

Wireless Personal Communications - Analyzing wireless communication performances by using information-theoretic results is of practical importance. In this paper, first, an achievable secrecy rate...     

Implementation of IEEE 802.16e Standard on Xilinx ZC706: A C-RAN Prototype

Wireless Personal Communications - In this paper, we propose an architecture to implement IEEE 802.16e transmitter and receiver physical (PHY) layer on field programmable gate arrays. Several...     

A generic construction to build simple oblivious transfer protocols from homomorphic encryption schemes

The Journal of Supercomputing - Oblivious transfer is a fundamental problem in cryptography where it is required that a sender transfers one of potentially many pieces of information to a receiver...     

A 3D analytical modeling of tri-gate tunneling field-effect transistors

In this paper, a three-dimensional (3D) analytical solution of the electrostatic potential is derived for the tri-gate tunneling field-effect transistors (TG TFETs) based on the perimeter-weighted-sum approach. The model is derived by separating the device into a symmetric and an asymmetric double-gate (DG) TFETs and then solving the 2D Poisson’s equation for these structures. The subthreshold tunneling current expression is extracted by numerical integrating the band-to-band tunneling generation rate over the volume of the device. It is shown that the potential distributions, the electric field profile, and the tunneling current predicted by the analytical model are in close agreement with the 3D device simulation results without the need of fitting parameters. Additionally, the dependence of the tunneling current on the device parameters in terms of the gate oxide thickness, gate dielectric constant, channel length, and applied drain bias is investigated and also demonstrated its agreement with the device simulations.     

Poly (α-methylstyrene-styrene-acrylonitrile) as a heat deflection additive for PVC: Physical and rheological properties

Poly(α-methylstyrene-styrene-acrylonitrile) (AMSAN) is an additive used to improve the heat deflection temperature of PVC. The effect of its addition on the HDT of a typical injection molding formulation is studied. Other physical properties like impact strength, yield strength, modulus of elasticity, and viscosity are also reported. It is shown that HDT and impact strength are decoupleable based on the amount of AMSAN and impact modifier in the formulation. Calculation of the required percentage of heat distortion additive and impact modifier for a typical injection molding application are demonstrated.