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Mohamed Niyas R.,HIGH-TECH | Prabhakaran N.,HIGH-TECH | Sathya N.,Vel Technology Owned By RS Trust | Vaishnavi P.,HIGH-TECH | Madhusudhana Reddy B.,HIGH-TECH
Journal of Theoretical and Applied Information Technology

Many multimedia and digital signal processing systems are desirable to maintain a fixed format and to allow little accuracy loss to output data. The objective of this paper is to design a fixed width modified booth multiplier with high error performance. And the need to derive an effective error compensation function that makes the error distribution more symmetric and centralized in the error equalized to zero. The compensation circuit is mainly composed of simplified sorting network and this can achieve a tiny mean and mean square error as compared to the other circuits. The odd even sorting networks used for error compensation are composed of appropriately connected comparators. The simplified form of sorting network consist of neither NAND, NOR, AND-OR INVERTER (AOI) and OR-AND-INVERTER (OAI). In fixed width modified Booth multiplication, to reduce the number of partial products by a factor of two, modified booth encoding is used. The software used for the simulation of this circuit is Altera-Quartus II. The RTL code is generated using the above software. The implementation of the circuit is done using DE1 board. © 2005 - 2014 JATIT & LLS. All rights reserved. Source

Ravisankar R.,Government of Tamilnadu | Naseerutheen A.,C Abdul Hakeem College | Chandrasekaran A.,Vel Technology Owned By RS Trust | Rajan K.,Pondicherry University

This paper is focused on a spectroscopic study of some ancient pottery shreds from an archaeological site Manaveli village, Puducherry, India. Analytical characterization using Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and differential scanning colorimetric coupled with thermo gravimetric analysis were carried out on red and black ware and red ware recently excavated from the above site. The experimental results of FT-IR and XRD are similar and allowed us to identify the mineralogical composition of pottery samples. In addition, TGA was applied in order to study the dehydration of hydroscopic water and decomposition of carboxyl group in the powdered pottery samples during heating. Moreover, this paper proves that all the above spectroscopic techniques are very useful analytical tool for the examination of ancient pottery, which is also suitable for the identification of its firing temperature and firing atmosphere. © 2014 Elsevier GmbH. Source

Muthu S.,Coimbatore Institute of Technology | Devadasan S.R.,P.A. College | Sugumaran C.,Vel Technology Owned By RS Trust
Procedia Engineering

This research portrays the pilot implementation of Six Sigma DMAIC (Define-Measure-Analyze-Improve-Control) phases to improve the effectiveness of shell and tube heat exchanger in a small sized furnace manufacturing company. Shell and tube heat exchanger is one of the critical components of the furnace. The imperative objective is to improve the quality of the furnace through DMAIC phases. In define phase, the critical to quality (CTQ) parameter was identified as effectiveness in shell and tube heat exchanger through the voice of the customer (VOC) and Pareto Chart. In measure phase, the present effectiveness was measured as 0.61. In analysis phase, the reason for the reduction of effectiveness was identified as less heat transfer area through cause and effect diagram. In improve phase, the existing design was modified through various alternative solutions by conducting brainstorming sessions. In this phase, the solution was identified with the introduction of circular fins over the bare tubes to improve the effectiveness in the shell and tube heat exchanger. Consequently, the effectiveness has been enhanced from 0.61 to 0.664. In control phase, the control strategies were recommended to sustain the improvements in shell and tube heat exchanger. In the end, the annual monetary savings of Rs.0.34 million were achieved through the implementation of DMAIC phases in the furnace manufacturing company. © 2014 The Authors. Source

Ravisankar R.,Government Arts College | Chandrasekaran A.,Vellore Institute of Technology | Vijayagopal P.,Indira Gandhi Center for Atomic Research | Venkatraman B.,Indira Gandhi Center for Atomic Research | And 3 more authors.
Radiation Physics and Chemistry

The natural radioactivity of soils at Yelagiri hills has been studied in this paper. The radioactivities of 25 samples have been measured with a NaI(Tl) detector. The radioactivity concentrations of 238U, 232Th and 40K ranged from ≤2.17 to 53.23, 13.54 to 89.89 and from 625.09 to 2207.3Bqkg -1, respectively. The measured activity concentrations for these radionuclides were compared with world average activity of soil. The average activity concentration of 232Th in the present study is 1.19 times higher than world median value while the activity of 238U and 40K is found to be lower. In order to evaluate the radiological hazard of the natural radioactivity, the radium equivalent activity Ra eq, the absorbed dose rate D R, the annual effective dose rate and the external hazard index (H ex) have been calculated and compared with the internationally approved values. The study provides background radioactivity concentrations in Yelagiri hills. © 2012 Elsevier Ltd. Source

Chandrasekaran A.,Vel Technology Owned By RS Trust | Ravisankar R.,Government Arts College | Rajalakshmi A.,SSN College of Engineering | Vijayagopal P.,Indira Gandhi Center for Atomic Research | Venkatraman B.,Indira Gandhi Center for Atomic Research
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy

Gamma Ray and Fourier Transform Infrared (FTIR) spectroscopic techniques were used to evaluate the natural radioactivity due to natural radionuclides and mineralogical characterization in soils of Yelagiri hills, Tamilnadu, India. Various radiological parameters were calculated to assess the radiation hazards associated with the soil. The distribution pattern of activity due to natural radionuclides is explained by Kriging method of mapping. Using FTIR spectroscopic technique the minerals such as quartz, microcline feldspar, orthoclase feldspar, kaolinite, montmorillonite, illite, and organic carbon were identified and characterized. The extinction coefficient values were calculated to know the relative distribution of major minerals such as quartz, microcline feldspar, orthoclase feldspar and kaolinite. The calculated values indicate that the amount of quartz is higher than orthoclase feldspar, microcline feldspar and much higher than kaolinite. Crystallinity index was calculated to know the crystalline nature of quartz. The result indicates that the presence of disordered crystalline quartz in soils. The relation between minerals and radioactivity was assessed by multivariate statistical analysis (Pearson's correlation and cluster analysis). The statistical analysis confirms that the clay mineral kaolinite and non-clay mineral quartz is the major factor than other major minerals to induce the important radioactivity variables and concentrations of uranium and thorium. © 2014 Elsevier B.V. Source

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