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

Farmers are widely applying chemical pesticides to the agricultural lands to kill weeds to reduce crop losses and to prevent diseases created by insects. By applying pesticides to the lands, typically have greater agricultural yield. As pesticides have toxic ingredients, they can create so many health problems to humans and will degrade the environment gradually. Since each pesticide is linked to some health hazards when the composition of the pesticides exceeds its limits, uncertainty arises in determining the human health hazards. Hence, fuzzy logic-based decision-making model is designed to diagnose the human health hazards. In the model, the linguistic terms are used to represent the association between pesticides and human health hazards with the aid of chemists and physicians. Fuzzy numbers are used to represent the values for the linguistic terms. Therefore, the intent of the paper is to analyze the human health hazards induced by applying different pesticides in the agricultural lands through the proposed fuzzy decision-making system. Copyright © 2020 IGI Global.

World University root node

Mathematics

School of Advanced Sciences

Chennai Campus

Physics

International Journal of Fuzzy System Applications

A fuzzy decision-making system for the impact of pesticides applied in agricultural fields on human health

The Sn-doped silver oxide (Ag 2 O) thin film deposited on well-cleaned microscopic glass plates by Jet Nebulizer Technique was reported in this work. The coated thin film was annealed at 200 and 400 °C temperatures, respectively. The XRD investigation on the thin film at three different temperatures have been carried out and their results showed that, the maximum peak intensity of (200) plane was observed at 400 °C than rest of the two samples. In addition to that, it was also found that, the annealing process has certainly improved the crystallization of the film particularly at 400 °C. The SEM and TEM results confirmed that the particle size in the range of 30–50 nm. The peaks corresponding to the Ag and O in EDAX spectrum ensure the film is purely made up of nano-Ag 2 O and the presence of Sn was also confirmed by its respective peak. Additionally, vibrational analysis and Raman spectroscopy was carried out in this work to confirm the modes of vibration of the NPs. Sensitivity analyses was carried out to test the sensing capacity of the powder. © 2017, Shiraz University.

Iranian Journal of Science and Technology, Transaction A: Science

Investigations of Doping of Sn with Ag 2 O as a Thin Film on Glass Plate for Morphological Studies

Fuzzy numbers play a vital role in all the decision making problems as it represents the value to the linguistic terms which is the input for all the decision making techniques. In the last decade, most of the researchers have used triangular and trapezoidal fuzzy numbers to represent linguistic terms for solving the problem in the uncertain environment. But it is inadequate of dealing a problem when fuzziness arises in seven different points. Therefore, this paper™s intent is to propose the linear and non-linear heptagonal fuzzy number under uncertain environments. This paper derives the Haar ranking method for the heptagonal fuzzy number. Furthermore, Algorithm for the fuzzy assignment problem with Haar ranking is proposed. To check the soundness of the proposed ranking method, Fuzzy assignment problem in agriculture has been taken to determine the minimum cost for organic fertilizers applied in the field. Â© BEIESP.

International Journal of Innovative Technology and Exploring Engineering

Haar ranking of linear and non-linear heptagonal fuzzy number and its application

In this paper, a novel attempt is made to formulate a hybrid system by combining the Fuzzy Cognitive Map (FCM), the Delphi Method, and the VIKOR method through the Haar ranking of Hexagonal Fuzzy Number. To illustrate this technique, the solid waste management is taken. Solid Waste arises from human and animal activities can generate adverse effect on human health and affect the living environment drastically when proper solid waste management is not done efficiently. The proper disposal of solid waste management aids to diminish the horrible impacts on both human health and environment to sustain economic growth and better quality of life. Therefore, this present study analyses the Solid Waste Management through the novel Haar Hexagonal VIKOR with FCM techniques. © BEIESP.

International Journal of Recent Technology and Engineering

Fuzzy haar hexagonal VIKOR with FCM techniques to analyze the solid waste management

The ZnO, TiO2, and ZnO-10 wt% of TiO2 and TiO2-10 wt% ZnO nanoparticles are synthesized by solution combustion synthesis at 200 C. The crystal structure of the four samples are analyzed by X-ray diffractometer (XRD). XRD results suggest that the crystal properties of the doped samples improved without any effect on the parent lattice. The morphological and optical properties of the TiO2-doped ZnO sample are characterized by scanning electron microscopy and UV-Vis spectroscopy. The IR and Raman laser observations indicate that the compounds consist of Ti- O and Zn-O bonds, suggesting that the prepared compounds are indeed pure. An upward shift, which is most likely due to the doping material, is observed in the absorption studies. This article discusses the structural, optical, and morphological properties that are changed with the doping concentrations. © 2018 American Scientific Publishers

Journal of Bionanoscience

Comparative Study of ZnO, TiO2, ZnO-Doped TiO2 and TiO2-Doped ZnO Nanocomposites and Their Biological Applications

The objective of this article is to deal with the application of nanoparticles synthesized using Ag 2 O and Cu 2 O were doped with TiO 2 . The nanoparticles were synthesized using Avocado fruit extract and their applications were evaluated for antimicrobial with cytotoxic properties. The TiO 2 doped with Ag 2 O and Cu 2 O nanoparticles were characterized using UV-Vis spectrum, Transmission Electron Microscopy (TEM), Fourier Transform Infrared Spectroscopy (FTIR), Elemental X-ray Analysis (EDAX) and X-ray Diffractometer (XRD) patterns respectively. The both Ag 2 O and Cu 2 O were doped with TiO 2 nanoparticles were in spherical having size ranging from 45-50 nm, and crystalline in nature. Interestingly, the synthesized material exhibited promising activity against the bacterial pathogens such as Escherichia coli, Pseudomonas aeroginosa, Staphylococcus aureus and Salmonella typhi respectively. In addition, the LC50 value (3.929 mg/ml; with 3.102-5.789 as upper and lower limits respectively) against the cell lines were its advantages. Over all, it is concluded that the synthesized material can be used for better biological applications. © 2018 American Scientific Publishers All rights reserved.

Feasibility Studies on Avocado as Reducing Agent in TiO2 Doped with Ag2O and Cu2O Nanoparticles for Biological Applications

NiO/CuO/ZnO combined semiconductor metal oxide structures based ternary nanocomposites were synthesized in 2:1:1,1:2:1 and 1:1:2 molar ratios using a simple and combined co-precipitation - hydrothermal method without utilizing any fuels, capping agents or surfactants. The structural, bonding, band gaps and morphological behaviour of the synthesized ternary nanocomposites were investigated using x-ray diffraction, Fourier transform infrared spectroscopy, UV-Diffuse reflectance spectroscopy and atomic force microscopic measurements. The dielectric properties recorded for these combined semiconductor metal oxide structures are valid with Maxwell-Wagner (M-W) model which is based on the dielectric nature in conducting grains layered with poorly conducting grain boundaries. The higher values of dielectric constant were observed for the ternary nanocomposite ratio 1:2:1 and the reduction in the values of dielectric constant of other ternary nanocomposite ratios (1:1:2 and 2:1:1) at lower frequencies is due to the fact the grain boundaries are preferably occupied by more Cu2+ ions than N i 2 + and Zn2+ ions. This kind of attempt in investigating the physical insights of combined semiconductor metal oxide structures is needed for the development of novel semiconducting devices. © 2018IOP Publishing Ltd.

Materials Research Express

Structural, morphological and dielectric investigations on NiO/CuO/ZnO combined semiconductor metal oxide structures based ternary nanocomposites

Nanomaterials of CeO2 with A. vera were synthesized by using simple chemical method. Grapes drops are used as an oxidizing agent. Structural and morphological studies of nanomaterials of cerium oxide (CeO2), were studied for combustion method of preparation. The precursor solution was initialized by a hydrothermal reaction. Cerium hydroxyl carbonate precursors which involves cerium (III) nitrate Ce(NO3)3. 6 H2O with (1.0 M) of seashell powder, 3% A. vera, extracts, grapes and pomegranate drops and this complex solution was used to produce the CeO2 powder particles. We have prepared another sample with 5% of Aloe vera extract and found that 3% Aloe vera extract has lesser grain size and enhanced band gap values, so the article explained the sample analysis of combination with 3% extract of Aloe vera. The product has the rod pattern which was the unusual features appear to originate from the unique crystal chemistry aspects. From the optical absorption spectrum, it has been shown that the CeO2 rods have 3.847 eV of direct band gap energy. The minimum inhibitory concentration (MIC) values of the synthesized compounds exhibited activity towards various microbial pathogens such as B. subtilis (15 μg/mL), S. aureus (50 μg/mL), S. epidermidis (20 μg/mL), E. faecalis (25 μg/mL) and towards E. coli (100 μg/mL), K. pneumoniae (50 μg/mL) and P. aeruginosa (75 μg/mL) respectively. The tests on bacterial activities confirmed that the CeO2 rods are suitable hand for the biological applications. The seashell structure and the phytochemical contents of A. vera might enhance its bacterial activities. © 2017 Elsevier B.V.

Mechanical

School of Mechanical Engineering

Journal of Photochemistry and Photobiology B: Biology

Green chemical approach towards the synthesis of CeO 2 doped with seashell and its bacterial applications intermediated with fruit extracts

Abstract: Porous carbons prepared by carbonization of solid leather wastes were employed for supercapacitor applications using KOH electrolyte. Advanced instrumentation techniques were used to determine the physicochemical properties of the porous carbon samples. Three-electrode configuration was used to investigate the electrochemical properties of porous carbon electrodes through cyclic voltammetry studies, galvanostatic charge–discharge tests, electrochemical impedance spectroscopy (EIS) techniques in 1 M KOH electrolyte. Porous carbons exhibit high specific surface areas in a range of 613–716 m2 g−1, as well as superior energy storage capacity as electrodes for supercapacitors. Porous carbon electrodes activated at 900 °C exhibited specific capacitance up to 1800 F/g in alkali medium. All the solid leather waste carbons established stable cycle performance over 5000 cycles. These desirable capacitive performances enable solid leather waste-derived carbons as a source of new materials for low-cost energy storage devices as well as supercapacitors. This paper put forwards a new concept of ‘waste to value-added products’ that can be a helping hand for leather industries and its solid waste management disposal problems. The highlights of this research work suggest that leather industries could implement and make it feasible for commercialization. Graphical Abstract: [Figure not available: see fulltext.] © 2016, Springer-Verlag Berlin Heidelberg.

VIT Unitversity

Clean Technologies and Environmental Policy

A new approach to solid waste management: fabrication of supercapacitor electrodes from solid leather wastes using aqueous KOH electrolyte

Fulltext

Journal of Powder Metallurgy & Mining

Review on a Nanomaterials Mechanisms-Induced Oxidative Stress and Toxicity

Fluid Mechanics: Open Access

Cadmium Doped with Selenides and Telluride for Photovoltaic Applications: A Review

A high quality reflective vertical surface is required for various optical micro electro mechanical system (MEMS) devices. In this paper, we discuss an extensive investigation of TiAu sputtering, with respect to temperature, pressure, and electric power input, followed by rapid thermal annealing (RTA) to improve the adhesion and reflection characteristics of a vertical micromirror. The vertical surface was fabricated by means of the deep reactive ion etching (DRIE) process of a silicon-on-insulator (SOI) wafer, with an 80-μm -thick layer of Si. Then, 20-nm -thick Ti and 200-nm -thick Au films were deposited on the vertical surface as adhesion and reflective layers, respectively, using rf/dc magnetron sputtering. The Au films were deposited at room temperature (20 °C) and annealed at 380 °C for 30 s in a RTA chamber. While taking into consideration the conformability and the reflectance of the Au vertical mirror, the process conditions were optimized at an argon pressure of 10 mTorr and an electric power input of 300 W. The best surface roughness obtained was 7 nm (rms) for a useful upper sidewall with a reflectance of 97.5% in the IR (Infrared) range (1500 nm-1600 nm). © 2005 American Vacuum Society.