Electronics

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

The theory of Rough set is a new mathematical tool to deal with intelligent data mining proposed by Z Pawlak. This paper implements the concept of tolerance relation on incomplete information system using variable precision rough set(VPRS) with flexible classification, which is an extension to the classical rough set theory. Here we have analyzed a cancer data set provided by national cancer institute from (1975- 2008) and estimated the value of tolerance factor for each country people based on their age, using VPRS with flexible classification model. Copyright © 2012 ACM.

Department of Software Systems

School of Computer Science and Engineering

Vellore Campus

VIT Unitversity

School of Electronics Engineering

Chennai Campus

Proceedings of the Second International Conference on Computational Science, Engineering and Information Technology - CCSEIT '12

Cancer data investigation using variable precision Rough set with flexible classification

An effective technique for three dimensional reconstruction of craniofacial structure from the contours of CT slices is presented. Preprocessing is done to suppress the noise and distortion introduced during image acquisition. Discrete Curvelet transform is applied to extract the contours of individual slices. The edge points are stacked to obtain the 3D point cloud and it is Delaunay triangulated for reconstruction. The edge detection performance is compared with Laplacian, Sobel and Canny edge detectors. The final reconstructed 3D structure is compared with those edge-detector-based reconstruction (with the same set of 2D slices) on the basis of number of triangular indices and time complexity. Copyright © 2012 Inderscience Enterprises Ltd.

World University root node

International Journal of Biomedical Engineering and Technology

Tomographic 3D cranio-facial reconstruction using curvelet transform

This paper presents an efficient method to detect multiple objects in multiple views by part based approach in computer vision. The part based method is adapted to detect and classify the multiple parts of objects as car/person in order to overcome the occlusion. For detecting the multiple instances of object, the cascaded structure is considered, with each node as joint boosting classifier with shared features. Features extracted are Haar-rectangular features, as it efficiently captures the structural property of the object. With joint boosting algorithm, the features are shared among different classes, thus in turn reducing the computational complexity and detection time. The classifier efficiency is analysed by two parameters namely precision and recall. Although the proposed scheme is validated for car and pedestrian classes, the training and detection techniques used in this scheme can be generalized for any object class. © 2012 IEEE.

International Conference on Recent Trends in Information Technology, ICRTIT 2012

Multi-class object detection by part based approach

Wollastonite is one of the most widely used bioceramic due to its biocompatibility and bioactivity. Wollastonite (CaSiO3) was synthesized by sol-gel combustion process using citric acid as a fuel/reductant and nitrate as an oxidant. Calcium nitrate was taken as a source of calcium and tetraethyl orthosilicate was taken as the source of silicate. The obtained product was characterized by powder X-ray diffraction, Fourier - Transform Infrared spectroscopy and Scanning electron microscopy. The XRD pattern shows that the product formed is a pure and single phasic wollastonite. The FT-IR spectra revealed that there is no secondary phase present in the product. The SEM image shows that the product is highly porous. The particle size calculated using Scheerer’s formula shows that the particles are in a nano regime.

Department of Chemistry

School of Advanced Sciences

Advanced Materials Research

Synthesis, Characterization and Bioactivity Studies of Calcium Silicate Bioceramics

A Vehicular Ad-Hoc Network or VANET is a technology for implementing Vehicle-to-Vehicle (V2V) and Vehicle-to-Infrastructure (V2I) communications. The present Vehicular mobility framework is not considering realtime constraints such as vehicle' priority, lane-changes, speed-limit etc. The proposed Multi-Constraint Realtime Vehicular (MCRV) mobility framework is equipped with important criterion like collision avoidance between vehicles and traffic reports. Also certain vehicles such as ambulance, fire service vans, police patrols need to be given a high priority in our envisioned network architecture, as their requirements are crucial during emergency situations. Hence, enabling QoS for differentiating the services according to vehicular priorities and providing group communications, alongside vehicular collision avoidance, will be implemented using NS3 and SUMO.

Lecture Notes in Engineering and Computer Science

A multi-constraint real-time vehicular (MCRV) mobility framework for 4G heterogeneous Vehicular Ad-Hoc Networks

The Next generation mobile communication system called as 4G is expected to include heterogeneous wireless networks that will offer high data rate multimedia services to end users. In present wireless systems the capability of broader coverage is available but has the limitation of bandwidth and network cost. The proposed Seamless Media Independent Resilience Triggering (SMIRT) framework will provide decision based on soft-handover for Heterogeneous Networks like Wi-Fi, WiMAX and LTE. It will provide seamless roaming across the heterogeneous networks through the media independent handover framework without user intervention. This framework will be simulated by using NS3 and evaluate the increased performances like throughput, QoS, coverage and decreased performances like packet loss and delay.

SMIRT with call admission control (CAC) based vertical handover decision for seamless mobility in multi-access 4G heterogeneous wireless overlav networks

An investigation of magnetic current distribution of CPW fed arrow shaped UWB antenna is reported. This enables the precise prediction of working principle of UWB antenna, since the traditional UWB antenna simulations ignore important details. The computation was performed numerically for an arrow shaped antenna at different resonant frequencies at various input current phase changes and was found that the traveling wave characteristic of the antenna exhibits the UWB property. The computed result is compared with different geometries, such as circular disc monopole and eared antenna. © 2005 - 2012 JATIT & LLS. All rights reserved.

Journal of Theoretical and Applied Information Technology

Magnetic current distribution analysis of CPW fed arrow shaped UWB antenna

This Letter presents simulation, fabrication and testing of a high-performance quad-beam silicon piezoresistive accelerometer with very low cross-axis sensitivity. Cross-axis sensitivity in piezoresistive accelerometers is an important issue particularly for high-performance applications. In the present Letter, low cross-axis sensitivity is achieved by improving the device stability by placing four flexures in line with the proof mass edges. The accelerometer device is realised in a single-step double-sided bulk micromachining technique using a 5 dual-doped tetra methyl ammonium hydroxide solution as an anisotropic etchant. Test results of four fabricated devices show an average prime-axis sensitivity of 559.5μV/g/5V, a maximum cross-axis sensitivity of 0.62 full scale (FS acceleration=13g) of the prime-axis sensitivity and nonlinearity at a level of 0.5 of FS which are comparatively better than already reported devices and commercially available piezoresistive sensors. © 2012 The Institution of Engineering and Technology.

Micro & Nano Letters

Realisation of silicon piezoresistive accelerometer with proof mass-edge-aligned-flexures using wet anisotropic etching

This paper introduces a new approach for me- chanical design of planar six-bar linkages with rotary joints which produce two dwells in each cycle of the input crank. The approach builds on the concept of function generation in a simple manner. The synthesis problem is posed as a single- objective constrained optimisation problem. A genetic algorithm-based optimisation scheme, namely the Non-dominated Sorting Genetic Algorithm-II (NSGA-II) has been used for solving the optimisation problem. The proposed method has been illustrated by means of an example problem from a recent contribution to literature. It is seen that the results compare favourably with the existing work. © (2012) Trans Tech Publications, Switzerland.

Applied Mechanics and Materials

Optimisation design of six-bar double dwell mechanisms: A new approach

In this paper, two mixer designs based on conventional independent double gate FET and junctionless independent double gate FET are compared using TCAD simulation. It has been observed that the performance of junctionless double gate device based mixer is on par with the conventional double gate FET based mixer except a small reduction in the amplitude of the final extracted signal. © 2012 IEEE.