Bishop Heber College

Tiruchirappalli, India

Bishop Heber College

Tiruchirappalli, India

Bishop Heber College is a Christian educational institution in Tiruchirappalli, Tamil Nadu, India. It was founded in 1966, although the school has historical roots extending through various earlier local religious schools to about the mid-nineteenth century. Wikipedia.

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Rio R.N.,Bishop Heber College
Advances in Intelligent Systems and Computing | Year: 2017

Mobile Ad-Hoc Networks (MANETs) provides substantial services in the field of network. MANETs is an infrastructure-less network, containing more number of individual wireless mobile nodes (devices) that communicate with one another without any aid of centralized server or base station. Due to dynamic topology, MANETs faces many issues associated with mobile nodes such as link failure, battery power, delay, etc. The main aim of this paper is to reduce data transfer delay by finding optimum path. Ultimately, the outcomes of the proposed work AASOP increase the performance of MANETs by minimizing data transfer delay which in turn increases Packet Delivery Ratio (PDR). © Springer Nature Singapore Pte Ltd. 2017.

Ramkumar K.,Bishop Heber College
Advances in Intelligent Systems and Computing | Year: 2017

Call Admission Control (CAC) in wireless communication plays major role in deciding the admission of real-time and non real-time mobile users. For non real-time, it does not care for the Quality of Service (QoS) performance. But for real-time services, the CAC cares for the QoS by keeping the sufficient bandwidth throughout the transmission. Bandwidth determines the system capacity and speed. In this paper, a new Analytic Hierarchy Process (AHP)-based CAC algorithm is proposed for increasing the number of admission and reducing the admission of less compressed calls. For this task the various codecs such as G.711, G.729, G.723, G.726, AMR, EVRC, and iLBC have been taken. AHP is applied among them to take the right decision and it produces the ranking order. That rank helps to save more bandwidth and increases the throughput (Packets per second). This task is carried out by taking the criteria like bandwidth, packetization delay, and compression ratio of each individual codecs. The ultimate aim of this TACA is to give better QoS performance for real-time services and increase the system throughput for Voice over Internet Protocol. © Springer Nature Singapore Pte Ltd. 2017.

Jasmine R.,Bishop Heber College | Sakthivel H.,Bishop Heber College
International Journal of PharmTech Research | Year: 2015

Cardiovascular diseases are the leading cause of deaths on the globally. Although cardiovascular disease usually affects older adults, the antecedents of cardiovascular disease, notable atherosclerosis, begin in early life, making primary prevention efforts necessary from childhood Dos. This is extremely important considering that 1 in 3 people die from complications attributable to atherosclerosis. Cholesteryl esterase is the key enzyme involved in the hydrolysis of lipids and transport of free cholesterol. The hydrolysis of dietary cholesterol ester into cholesterol by cholesteryl esterase in the intestinal lumen is an essential process for its absorption. The reduction of cholesterol absorption by inhibiting cholesteryl esterase is a new target site of intervention for the treatment of hyperlipidaemia. Elevated levels of lipids such as cholesterol and triglycerides in the blood cause hyperlipidaemia, which is an established risk factor of atherosclerosis and coronary heart disease. Although several drugs are generally well tolerated and effective, they have been found to cause many adverse side effects. It necessitates the need to evolve alternative therapies, such as herbal therapy. The results from the molecular docking of cholestryl esterase with gallic acid and ellagicacid fromTerminalia chebula seeds have provided insight to the use of plants as drugs for the treatment of hypercholesterolemia. As revealed in this study, the compound ellagic acid has the highest potential to regulate the cholesterol level in the blood. © 2015, Sphinx Knowledge House. All Right Reserved.

Sakkaravarthi K.,Bishop Heber College | Kanna T.,Bishop Heber College
European Physical Journal: Special Topics | Year: 2013

In this paper, we construct the bright-soliton bound states of an integrable (2 + 1)-dimensional multicomponent long wave-short wave resonance interaction (LSRI) system by using the exact bright-soliton solutions obtained in Ref. [24] and analyze their interesting collision dynamics. We show that the beating and breathing oscillations of the bound solitons can be controlled by tuning the polarization parameters. Also, we explore the interaction between the bound-soliton and a standard soliton. We also point out that the two bound-soliton state seems to be robust against collision with a standard soliton and remain to be bounded even after collision. © 2013 EDP Sciences and Springer.

John Robinson P.,Bishop Heber College
International Journal of Fuzzy System Applications | Year: 2016

Solving Multiple Attribute Group Decision Making (MAGDM) problems has become one of the most important researches in recent days. In situations where the information or the data is of the form of an Intuitionistic Triangular Fuzzy Number (ITrFN) or Intuitionistic Trapezoidal Fuzzy Number (ITzFN), a new distance function is defined for ranking the alternatives in the decision making process. After processing the decision information through a sequence of arithmetic aggregation operators, namely, the Intuitionistic Triangular Fuzzy Weighted Arithmetic Averaging (ITrFWAA), Intuitionistic Triangular Fuzzy Ordered Weighted Averaging (ITrFOWA) operator and the Intuitionistic Triangular Fuzzy Hybrid Aggregation (ITrFHA) operator, the proposed distance function is utilized to rank the best alternative. A model is proposed to solve MAGDM problems using the developed distance formula defined for ITrFNs. Numerical illustration is provided and comparisons are made with some of the existing MAGDM models and ranking procedures. © 2016, IGI Global.

Vijayalakshmi K.,Bishop Heber College | David Jereil S.,Bishop Heber College
Ceramics International | Year: 2015

TiO2 and Fe-doped TiO2 nanowires were synthesized by spray pyrolysis technique to study their gas sensing properties towards ethanol. Charge transfer from metal dopant to TiO2, and modification of TiO2 with Fe doping was investigated for their ability to enhance gas sensing activity. The X-ray diffraction results indicate that the Fe dopant was substitutionally incorporated by replacing Ti4+ cations. Fourier transform infrared spectral analysis confirmed the presence of brookite TiO2. The UV-visible spectra showed the increase in absorption with Fe doping when compared with undoped TiO2 film, and optical band gap decreased slightly with Fe doping. SEM images revealed the presence of one dimensional structure of straight nanowires for undoped TiO2 and curved nanowires for Fe doped TiO2 films. To understand the enhancement of sensing performance of TiO2 film with Fe doping, the gas sensing mechanism of the film towards Ethanol at room temperature was studied and discussed. © 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

Vijayalakshmi K.,Bishop Heber College | Karthick K.,Bishop Heber College
Journal of Materials Science: Materials in Electronics | Year: 2013

In this paper, we report the synthesis of nano-structured Zinc Oxide (ZnO) and Magnesium doped Zinc Oxide (ZnO:Mg) using air stable and inexpensive chemicals, by microwave assisted processing. The as-synthesized ZnO and ZnO:Mg nanopowders were annealed at 800 C for 1 h. The samples were further characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy (SEM) and room temperature photoluminescence (PL) spectra. The crystallite size of ZnO decreased from 24 to 16 nm, and the intensity of most prominent vibration band of ZnO becomes weak when Mg dopant is added. SEM images of Mg doped ZnO showed clearly distinct hexagonal shaped nanoparticles with good crystalline quality and size contrast to ZnO. The PL result indicate that the ZnO exhibit strong and sharp UV emission peak at 380 nm. Our result showed that, by doping magnesium into ZnO, the UV emission peak shift towards the lower wavelength at ∼370 nm with increasing intensity, which may be attributed to the size confinement. From this study, the microwave processing method has been proved to be successful for preparing other metal oxide nanopowders with good crystal quality. © 2013 Springer Science+Business Media New York.

Vijayalakshmi K.,Bishop Heber College | Karthick K.,Bishop Heber College
Philosophical Magazine Letters | Year: 2012

Zinc oxide (ZnO) nanoparticles have been synthesized by a microwave heating method. The resulting powders were annealed at temperatures from 400°C to 800°C for 4h. The annealed powders were characterized in terms of their structural, morphological, and optical properties by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and room-temperature photoluminescence (PL) spectroscopy, respectively. The XRD patterns of the samples revealed the formation of phase-pure ZnO, apparently without any impurities. However, FT-IR spectra revealed the presence of carboxylate impurities, the signals of which disappear as the annealing temperatures are increased from 400°C to 800°C. SEM pictures showed increasing size ZnO nanoparticles with increase in annealing temperature. The powder annealed at 800°C is identified as hexagonal wurzite ZnO. The improved PL spectral performance of the ZnO powder correlates well with the improved crystalline quality of the nanoparticles, as revealed by the XRD and PL. Sharp ultraviolet (UV) band edge luminescence has been observed at 375nm, which is suitable for application in UV light emitting devices. The results also showed that the excitation wavelength dependence of the luminescence arises from quantum confinement effects. © 2012 Taylor & Francis.

Vijayalakshmi K.,Bishop Heber College | Karthick K.,Bishop Heber College | Gopalakrishna D.,Bishop Heber College
Ceramics International | Year: 2013

Nanostructured zinc oxide (ZnO) thin film sensors were prepared by spray pyrolysis, and their structural, optical, photoluminescence and morphological properties were investigated by X-ray diffractometer, UV-vis spectrometer, photoluminescence spectrometer, and scanning electron microscope (SEM), respectively. The post-annealing of ZnO film in air at 400 °C was found to be effective for the distribution of grains and their sizes, which favors the c-axis orientation of the film. This enhancement is accompanied by an increase in the optical band gap from 3.4 eV to 3.53 eV, which confirms the uniformity of ZnO film prepared by using a specially designed spray nozzle. SEM micrograph after heat treatment revealed uniform distribution of particles with well grown grains of ZnO. Hydrogen sensing measurement indicated the annealed ZnO film to show much higher response than the as deposited film. To understand the enhancement of the sensing performance of the annealed ZnO film, the gas sensing mechanism of the film was proposed and discussed. The magnitudes of the sensor response as well as its dependence on annealing differ significantly depending on the crystallite size of the film. © 2012 Elsevier Ltd and Techna Group S.r.l.

Kanna T.,Bishop Heber College | Sakkaravarthi K.,Bishop Heber College
Journal of Physics A: Mathematical and Theoretical | Year: 2011

We consider the integrable multicomponent coherently coupled nonlinear Schrödinger (CCNLS) equations describing simultaneous propagation of multiple fields in Kerr-type nonlinear media. The correct bilinear equations of m-CCNLS equations are obtained using a non-standard type of Hirota's bilinearization method, and the more general bright one solitons with single-hump and double-hump profiles including special flat-top profiles are obtained. The solitons are classified as coherently coupled solitons and incoherently coupled solitons depending upon the presence and absence of coherent nonlinearity arising due to the existence of the co-propagating modes/components. Further, the more general two-soliton solutions are obtained using this non-standard bilinearization approach, and various fascinating collision dynamics are pointed out. Particularly, we demonstrate that the collision between coherently coupled solitons and incoherently coupled solitons displays a non-trivial behaviour in which the former always undergoes energy switching accompanied by an amplitude-dependent phase-shift and change in the relative separation distance, leaving the latter unaltered. But the collision between coherently coupled solitons alone is found to be a standard elastic collision. Our study also reveals the important fact that the collision between incoherently coupled solitons arising in the m-CCNLS system with m = 2 is always elastic, whereas for m > 2 the collision becomes intricate, and for this case the m-CCNLS system exhibits interesting energy-sharing collision of solitons characterized by intensity redistribution, amplitude-dependent phase-shift and change in relative separation distance, which is similar to that of the multicomponent Manakov soliton collisions. This suggests that the m-CCNLS system can also be a suitable candidate for soliton collision-based optical computing in addition to the Manakov system. © 2011 IOP Publishing Ltd.

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