Communication

PEG1000-Based Dicationic Acidic Ionic Liquid as an Efficient Catalyst for Mannich-Type Reaction in Water
PEG1000-based dicationic acidic ionic liquid (PEG1000-DAIL) was found to be an efficient and recyclable catalyst for Mannich-type reaction of different ketones with various aromatic aldehydes and aromatic amines in water to give various β-arylamino ketones in good yields. The catalytic system could be easily recovered and reused for at least six runs only with slight decrease in its activity....


DNS tunneling detection through statistical fingerprints of protocol messages and machine learning
The use of covert-channel methods to bypass security policies has increased considerably in the recent years. Malicious users neutralize security restriction by encapsulating protocols like peer-to-peer, chat or http proxy into other allowed protocols like Domain Name Server (DNS) or HP. This paper illustrates a machine learning approach to detect one particular covert-channel technique: DNS tu...
Robust coding of wideband speech immittance spectral frequencies
In this paper, we propose a reduced complexity stochastic joint source-channel coding system developed for efficient and robust coding of wideband speech ISF (Immittance Spectral Frequency) parameters. Initially, the aim of this encoding system was to achieve a transparent quantization of ISF parameters for ideal transmissions over a noiseless channels. It was designed based on the switched spl...


RVIP: an indistinguishable approach to scalable network simulation at real time
In the hybrid simulation research, we investigate a new approach to build software virtual networks (SVNs) that are indistinguishable from their equivalent real live networks (LNs). We define the concept of ‘Network's Interactive Turing Test' based on the similar concept used in the artificial intelligence areas. Our goal is to actualize the interactive and indistinguishable real–virtual in...
A node division location detection scheme for chain-type wireless sensor networks
As a special type of wireless sensor network, the chain-type wireless sensor networks can be used to monitor narrow and long regions, such as roads, underground mine tunnels, rivers, and bridges. In this study, a perpendicular bisector division (PB) method was first presented, in which the location may be divided into more location sub-areas by a perpendicular bisector of each of two location n...


Scalable VANET content routing using hierarchical bloom filters
In this paper, we discuss scalable content-oriented routing that enables storing, sharing, and searching data totally within the urban VANET. We introduce a scalable proactive content discovery scheme, hierarchical bloom-filter routing (HBFR), to tackle mobility, large population, and rich content challenges of VANETs. Our simulation results show that HBFR achieves low latency and high content ...
Performance analysis of channel estimation in amplify-and-forward multi-hop direct forwarding wireless networks
In this paper, we study the performance of a training-based least square (LS) and linear minimum mean-square-error (LMMSE) channel estimation for both hop-by-hop and multi-hop direct forwarding wireless sensor networks over frequency-selective fading channels. Specifically, to investigate the properties of the channel estimation, we accomplish a theoretical analysis of MSE in terms of various l...

Prediction-based MAC-layer sensing in cognitive radio networks
We consider a cognitive radio network which coexists with multiple primary users (PUs) and secondary users (SUs) transmit over time-varying channels. In this scenario, one problem of the existing work is the poor performances of throughput and fairness due to variances of SUs' channel conditions and PUs' traffic patterns. To solve this problem, we propose a novel prediction-based MAC-layer sens...
Noise-based spreading in code division multiple access systems for secure communications
Binary spreading sequences or chaotic nonbinary sequences are used in code division multiple access systems. In contrast to those sequences, this paper presents the theory, simulation, and implementation in digital signal processor technology of a code division multiple access system that uses random spreading sequences. The expressions for probability of bit error are derived for the cases whe...

A Molecular Dynamics Simulation Study of the Mechanical Properties of Carbon-Nanotube Reinforced Nylon 6 Composite
In recent years, polymer/carbon nanotube composites have attracted a lot of attention because the polymer properties are significantly improved. In particular, intensive efforts have been directed toward synthesizing, characterizing and understanding polymer/CNT composites. In this paper, as an effort to explore the effective use of carbon nanotubes as a reinforcing material for advanced nanoco...
Finite Element Analysis of Elliptical Chord
The work presents the Finite element study of the effect of elliptical chords on the static and dynamic strength of tubular T-joints using ANSYS. Two different geometry configurations of the T-joints have been used, namely Type-1 and Type-2. An elastic analysis has been considered. The Static loading conditions used are: axial load, compressive load, In-plane bending (IPB) and Out-plane bending...

Effect of TiO2 and ZnS Fillers on the Bending Characteristics of GFRP Composites under Varied Flaw Configurations
In the present work an attempt has been made in order to investigate the bending strength and flextural strength of the TiO2 and ZnS filled Glass Fabric Reinforced Polymer (GFRP) composites. The volume fractions in the matrix were chosen as 1, 2 and 3%. The effect of notch orientation on interlaminar and translaminar bending characteristics has been evaluated and Bending strength has been evalu...
Microlubrication Effects During End Milling AISI 1018 Steel
Flood cooling is primarily used to cool and lubricate the cutting tool and workpiece interface during a machining process. But the adverse health effects caused by the use of flood coolants are drawing manufacturers' attention to develop methods for controlling occupational exposure to cutting fluids. Microlubrication serves as an alternative to flood cooling by reducing the volume of cutting f...
Modeling and Experimental Verification of Nano Positioning System for Nanomanufacturing
Vibration Assisted Nano Impact-machining by Loose Abrasives (VANILA) is a novel nanomachining process that combines the principles of vibration-assisted abrasive machining and tip-based nanomachining has been developed by the authors to perform target specific nano abrasive machining of hard and brittle materials. One of the critical factors in achieving nanoscale precision during the VANILA pr...
Optimized Backhaul Compression for Uplink Cloud Radio Access Network
This paper studies the uplink of a cloud radio access network (C-RAN) where the cell sites are connected to a cloud-computing-based central processor (CP) with noiseless backhaul links with finite capacities. We employ a simple compress-and-forward scheme in which the base stations (BSs) quantize the received signals and send the quantized signals to the CP using either distributed Wyner–...