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☑ Homotopy Perturbation for Excited Nonlinear Equations

Yusry O.El-Dib

Department of Mathematics, Faculty of Education, Ain Shams University, Roxy, Egypt

  • subtitlesABSTRACT

    The purpose of this paper is to apply a version of homotopy technique to excited nonlinear problems. A modulation for the homotopy perturbation is introduced in order to be successfully for nonlinear equations having periodic coefficients. The nonlinear damping Mathieu equation has been studied as a simplest example. The analysis proceeds without assuming weakly nonlinearity and without presence of small factor for the periodic term. In this analysis, two nonlinear solvability conditions are imposed. One of them imposed in the first-order homotopy perturbation and used to study the stability behavior at resonance and non-resonance cases. The second level of the perturbation produces another solvability condition and used to determine the unknowns appear in solution for the first-order solvability condition. The method can be, also, used for excited linear equation. Stability conditions, and also the transition curves, are formulated independent of the small parameter i.e. in the unperturbed form as an alternative to classical methods.

  • gamesKEYWORDS

    Homotopy perturbation method, nonlinear Mathieu equation, modulation method, parametric resonance.

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☑ Design of Micro Domain Composites Structure for Advance Optical Application

Sudhanshu Singh1 , Umesh Kumar Dwivedi2

1Amity School of Engineering and Technology, Amity University Rajasthan Jaipur 303002

2Assistant Professor, Amity School of Engineering & Technology, Amity University Rajasthan Jaipur 303002

  • subtitlesABSTRACT

    The experimental work focus on the electronics based on micron level devices. A lot of research work has been done on micron level electronics application, but the main untouched thing is the sandwiched concept of micro level fabrication with optics. We have been inclined towards green chemical and mathematical approach due to sustainability of research work. There is a tremendous opportunity and growth in the connection of micro devices used for optical applications such as use of CdSe (Cadmium Selenide), CdS (Cadmium Sulfide), AuNPs (Gold Nano Particles), AgNPs (Silver Nano Particles) etc. Experimental results may be compared with simulated results, from Virtual Nano Lab (VNL) etc in future work. This may also be follow up by optimizations.

  • gamesKEYWORDS

    Micro Devices, Optical Devices

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☑ Compatibility Studies of Polyacrylamide/Nanoclay/Copper oxide Nanocomposites on the Fluidic Physical Properties for Improvement of Inkjet Printability

Neetika Singh, Hari Madhav, Paramjit Singh, and Gautam Jaiswar

Department of Chemistry, Dr. B. R. Ambedkar University, Agra- 282 002, India

  • subtitlesABSTRACT

    Water-borne ink, an industrially important ink based on the polyacrylates, in that polyacrylamides imparts specific properties to the inks. Some properties of inks such as glossy or hardness is also adjust by varying the polymers, so in the present studies, nanocomposites of Polyacrylamide /Nanoclay/copper oxide nanoparticles were synthesized. The Nanoclay and Nanoparticles was varied to 0.5, 1 and 2% with respect to monomer of acrylamide and the effect of physical properties of ink such as, density, viscosity, surface tension, drying and smudging were performed to see the performance of it on polymer nanocomposites mixed in ink. The final product were characterized by UV-Vis and FTIR were used to see the presence of individual component of nanocomposites. It was found that the solution with polymer nanocomposites shows, improved in the physical properties with variation of 2% with respect to ink solution. Finally the biological activities were performed to see the effect of it on the ink solution.

  • gamesKEYWORDS

    Copper oxide nanoparticles, Inkjet Ink, Nanoclay, Polyacrylamide, Survismeter.

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☑ Sensing of Picric acid through fluorescence studies of PANI-IPN film

Tayyab ali2, J. Venkata viswanath1,4, N.V. Srinivasa Rao4, A. Venkataraman1,3*

1Materials Chemistry Laboratory, Department of Materials Science, Gulbarga University, Kalaburagi-585106 Karnataka, India

2Walchand Centre for research in nontechnology & Bionanotechnology (wcRnb), Solapur, Maharashtra, India.

3Department of Chemistry, Gulbarga University, Kalaburagi-585106 Karnataka, India.

4GUK R & D Centre, Premier Explosive limited, Peddakandukur, Nalgonda. Telengana, India.

  • subtitlesABSTRACT

    An interpenetrating polymer network (IPN) film for sensing of Picric acid (PA) is prepared by chemical assembly of polyaniline-polyvinyl alcohol (PANI-PVA) film by casting on a glass substrate. The prepared IPN film and is employed for the detection of a representative nitroaromatic compound (NAC), in the present case, (PA), for both in solution and in vapor phase of the analyte. This molecular design combines the advantages of IPN film based on single layer chemistry and the signal amplifications as effective way to create novel sensing film for the detection of NACs and other high energy materials (HEMs). Significant static fluorescence quenching was observed for the IPN films within a few seconds of treating with PA solutions. The vapour phase detection of PA was observed on IPN films with good response times. Almost linear increase in the sensitivity calculation obtained through the electrical resistivity measurements within 30.0 min is observed. The structural study of the IPN films before and after treatment with PA is studied employing FTIR spectrometer and stereozoom microscope. Fluorescence quenching Experiments on the IPN films showed that these films can be efficiently reused for two successive cycles. The electrical resistivity studies showed the film to sustain the vapour phase detection for a single measurement. The fluorescence studies and the electrical resistivity studies showed that the films are potential candidates for detection of PA vapours.

  • gamesKEYWORDS

    PANI-IPN film, Fluorescence, FTIR, Morphology, Sensing behavior.

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☑ Fabrication of Indium Oxide thin films sensor for H2S

H. N. Kapse1 ,B. H. Lashkari2, K. K. Makhija3

1Instrumentation & Control Department - Institute of Science & Technology for Advanced Studies & Research (ISTAR), Vallabh Vidyanagar - 388120, Gujarat, India

2Electronics Department - V. P. & R. P. T. P. Science College, Vallabh Vidyanagar - 388120, Gujarat, India

3Retired Reader in Electronics, Guest Editor-Sensors &Transducers, A/5 Kalikundnagar Society, Bakrol, Dist: Anand – 388315, Gujarat, India

  • subtitlesABSTRACT

    The present work is based on fabrication of Indium oxide with Tellurium dispersed thin film sensor for H2S gas application. The study reveals capability of Indium Oxide (IO) thin films as selective H2S gas sensor when Tellurium (Te) layer was dispersed. The inbuilt heater was fabricated from Indium Tin Oxide (ITO) thin films. Sensor showed promising results as the study of sensitivity was carried out for different concentrations of H2S gas. The ratio of electrical conductance when, the sensor is operating at a higher temperature and to that at lower temperature is unaffected by water vapour but is sensitive to H2S species. Hence the detrimental effects of humidity on the sensing properties of the IO thin film gas sensors are almost negligible on H2S . The gas sensor was operated at concentrations of 40, 100, 200 & 400 ppm of H2S gas at room temperature and was found to have good sensitivity and fast response.

  • gamesKEYWORDS

    H2S Gas Sensor, Indium Oxide, Thin films.

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