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Journal Cover Research & Reviews : Journal of Physics
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   ISSN (Print) 2278-2265 - ISSN (Online) 2278-2265
   Published by STM Journals Homepage  [67 journals]
  • Investigation of the Pulse Shape and Amplitude of 4He Gas Scintillations
           Produced by a 5.5 MeV Alpha Particle Source
    • Authors: A. Bala
      Abstract: Scintillation light is normally produced when ionizing particles such as alpha particles deposit their energy as they travel through a scintillating material, which can be solid, liquid or gaseous (e.g. 4He). In this project we compared scintillations produced in 4He gas by alpha particles (from the decay of 241Am) to those produced in plastic scintillator by cosmic-ray muons. The properties of photomultiplier and Si photomultipliers as sensors of scintillation light were also compared. A Geant 4 simulation was done to measure the amount of energy deposited in the gas cell and a plastic scintillator. The mean energy deposited in the gas cell was found to be 4.3 MeV and that in the plastic scintillator produced by cosmic muons was found to be 4.76 MeV. The mean amplitude was 5 mV and 8 mV at a bias voltage of 73.5 V for both the gas cell and plastic scintillator, respectively. Keywords: scintillation, photomultiplier tube, noble gas, cosmic muons, 4He Cite this Article Bala A. Investigation of the pulse shape and amplitude of 4He gas scintillations produced by a 5.5 MeV alpha particle source. Research & Reviews: Journal of Physics. 2016; 5(1): 18–29p. 
      PubDate: 2016-04-20
      Issue No: Vol. 5 (2016)
  • Review of Reliability and Availability Evaluation of MPPGCL Sirmour
           Hydropower Station using Markov Modelling
    • Authors: Ankit Singh, B. K. Tiwari
      Abstract: Water is one of the best renewable energy sources available, as we are almost totally dependent on the availability of depleting fossil fuels. Being more reliable and cost effective, hydel energy is attracting more investors and entrepreneurs for investing and establishing hydro power plant. Since maintenance and operation of a power plant is very challenging and complicated process, calculating and analyzing its compatibility and reliability is very important. This paper introduces Markov reliability model for MPPGCL Sirmour, India by studying the operational data and analysis of all parts of generating unit of the power plant for period of 2010–2015. The availability and reliability of individual unit of power plant is evaluated by taking into account different indices, namely failure rate (λ), repair rate (µ), MTTR, MTTF, MTBF through data collection and tabulating all types of failures for separate analysis. By these evaluations and analyses we can improve reliability of all the components of each unit of power plant. The error of a single sub-unit can affect the annual performance and efficiency of power generation. Thus Markov modelling technique will help to decrease repair cost and identify sensitive equipments to be replaced. And probably errors can be removed that make more power available at low cost as per given input, and allow a fair step towards energy independence of local community. Keywords: Hydro power plant, performance, failure and repair rate, Markov modelling, renewable energyCite this Article Ankit Singh, Tiwari BK. Review of Reliability and Availability Evaluation of MPPGCL Sirmour Hydropower Station using Markov Modelling. Research and Reviews: Journal of Physics. 2016; 5(1): 30–37p. 
      PubDate: 2016-04-20
      Issue No: Vol. 5 (2016)
  • Structural and Electrical Characterization of Mn-Zn Substituted Casr2:
           W-Type Hexaferrite
    • Authors: A.K. Akant, C.L. Khobaragade
      Abstract: In the present investigation the samples with chemical composition CaSr2 (Mn-Zn)x/2Fe16- xO27 (x= 0.2, 0.4, 0.6, 0.8, 1.0) have been synthesized by using chemical co-precipitation method. X-ray diffraction (XRD) and transmission electron microscopy (TEM) were used to study structure, lattice constants, crystallites size, x-ray density, bulk density, porosity and shape of ferrite powders. The prepared samples were found to have W-type hexagonal structure with the lattice parameters a= (5.77 Å–5.82 Å) and c= (33.08–33.47 Å). The average crystallites size calculated from XRD analysis is found to be 27.9 nm. The dependence of conductivity, dielectric constant and dielectric loss tangent on both the frequency and temperature was studied by using impedance analyzer. The increase in conductivity with an increase in temperature shows a semiconducting behavior of the compound. The room temperature (RT) resistivity varies from 5.38x105Ω-cm to 1.43x108Ω-cm with the doping concentration. Keywords: XRD, VSM, electrical properties, hysteresisCite this Article Akant and Khobaragade. Structural and Electrical Characterization of Mn-Zn Substituted Casr2: W-Type Hexaferrite. Research & Reviews: Journal of Physics. 2016; 5(1): 11–17p.

      PubDate: 2016-04-14
      Issue No: Vol. 5 (2016)
  • Pressure-Dependent Structural and Optical Properties of CdSe
    • Authors: A. Asad, A. Afaq
      Abstract: The structural and optical properties of Cadmium Selenide compound is investigated in Zinc blende phases under 0-30 GPa pressure using Density Functional Theory (DFT) with generalized gradient approximation (GGA) functional embodied in wien2k code. At zero pressure lattice constant and bulk modulus, are found to be in good agreement with experimental and other theoretical works. Other than zero pressure, there is reduction in volume of unit cell according to Murnaghan equation of state. The Results of dielectric constant, refractive index, absorption coefficient and reflectivity versus energy plots showed that peak values increase as well as shift towards higher energies as we increase pressure. This increase or shift of peak values indicates the enhancement of direct band gap in CdSe. Keywords: Density Functional Theory, Pressure dependent optical properties, GGACite this Article Asad A, Afaq A. Pressure-Dependent Structural and Optical Properties of CdSe. Research & Reviews: Journal of Physics. 2016; 5(1): 1–5p.

      PubDate: 2016-04-12
      Issue No: Vol. 5 (2016)
  • Structural and Optical Properties of ZnSe under Pressure
    • Authors: A. Asad, A. Afaq
      Abstract: The structural and optical properties of zinc selenide compound is investigated in zinc blende phases under 0-30 GPa pressure using density functional theory (DFT) calculations with generalized gradient approximation (GGA) embodied in Wien2k code. At zero pressure, lattice constant and bulk modulus are found to be in good agreement with experimental and other theoretical works. Other than zero pressure, there is a reduction in volume of the unit cell according to murnaghan equation of state. The results of dielectric constant, refractive index, absorption coefficient and reflectivity versus (vs.) energy plots showed that the peak value increases as well as shift towards higher energies as we increase pressure. This increase or shift of peak values indicates the enhancement of direct band gap in ZnSe. Keywords: GGA, density functional theory, pressure dependent optical properties Cite this Article Asad and Afaq. Structural and Optical Properties of ZnSe under Pressure. Research & Reviews: Journal of Physics. 2016; 5(1): 6–10p. 
      PubDate: 2016-03-27
      Issue No: Vol. 5 (2016)
  • Quantum Computation in the Brain and Emergence of Unperturbed Mind Due to
           Inductive BIS Load
    • Authors: Sobinder Singh, Madan Mohan Bajaj
      Abstract: “Solitons”, are comprised of a loosely coupled coherent system of subquantum entities. This coherent solitonic system of loosely coupled entities can be viewed as a partial description of consciousness. BIS stands for breakdown of integrated system. It is of three kinds: resistive, capacitative and inductive. In our present paper we will study the behavior of unperturbed mind due to strong inductive BIS processes.Keywords: BIS effect, quantum computation, microtubules, quantum zeno effect, solitonsCite this Article Sobinder Singh, Madan Mohan Bajaj. Quantum computation in the brain and emergence of unperturbed mind due to inductive BIS load. Research & Reviews: Journal of Physics. 2015; 4(3): 27–31p.

      PubDate: 2015-12-28
      Issue No: Vol. 4 (2015)
  • Galactic Cosmic Rays Modulation Due to Solar-Interplanetary Activity
    • Authors: BK Tiwari, BR Ghormare
      Abstract: The Sun displays a multiple magnetic activities collectivity referred as solar activity. Galactic cosmic rays are subjected to heliospheric modulation under the influence of solar outputs and their variability. We observed relation between selected solar activity parameters and GCR variation. The observation based on data of Omniweb data centre for solar- interplanetary  activity  and monthly mean count rate of cosmic ray intensity from neutron monitor Oulu ( cutoff rigidity Rc=0.80 GV) during the period of 23/24 solar cycle .We observed a record high value of galactic cosmic ray intensity with low values of solar - interplanetary activity parameters during this minimum period of solar activity and also  correlate count rate of cosmic ray intensity with solar activity parameters  i.e. better anti-correlated. Keywords: Cosmic ray intensity (CRI), Magnetic clouds (MCs), Coronal mass ejections (CMEs), Heliospheric magnetic field (HMF)Cite this Article B.K. Tiwari, B.R. Ghormare. Galactic cosmic rays modulation due to solar-interplanetary activity. Research & Reviews: Journal of Physics. 2015; 4(3): 23–26p.

      PubDate: 2015-12-18
      Issue No: Vol. 4 (2015)
    • Authors: Joshua Esangbedo, Justice Efam Adagbon
      Abstract: 2-Dimensional Geoelectrical Resistivity Imaging Survey was carried out to locate water bearing formation at Ozolua road (line 12) and Lonestar area (line 19) in Ologbo, Ikpoba-Okha Local Government area of Edo State, Nigeria. Wenner – Schlumberger Array was carried out to map the electrical properties as an aid to characterizing the subsurface conditions using Petrozenith Earth Resistivity Meter. A total of seventy-eight soundings were obtained in each of the areas and the field data was processed and inverted using zondres2d software to obtain 2-dimensional true resistivity of the subsurface. In the first profile, the resistivity range lies between 350 to about 10000Ωm, indicating variation in soil matrix, grain size distribution and water saturation. The decrease in resistivity at a depth below the top soil along the bottom right of the profile indicates the presence of saturated soil. In the second profile, the study reveals the range of spatial distribution of sand deposits with large quantity of gravel indicated by high resistivity of about 10000Ωm.The resistivity of the study areas suggest that the near surface materials comprises of coarse sand and gravel while the underlying deeper materials also has high resistivity values. The resistivity values of the models probably indicates presence of water bearing formation in the survey area at greater depth of penetration. It is suggested that more research should be carried out so as to probe deeper into the formation in other to get to the aquifer table.
      PubDate: 2015-12-16
      Issue No: Vol. 4 (2015)
  • An Overview on Powder X-Ray Diffraction and Its Current Applications
    • Authors: Gunashekar GS, Krishna M
      Abstract: Industries and research centres are continuously developing novel materials with light weight, higher strength and which can retain their properties at environmental temperatures. The cited properties mainly depend upon micro-structure and chemical composition of materials. Many research works focused to characterize the materials by different experiment techniques. Among them powder x-ray diffraction (XRD) is a most prominent, non-destructive technique used for investigation, characterization, and quality control of crystalline materials. Numerous fundamental XRD techniques and software packages are available for analyzing the crystal structure, crystallite size, degrees of crystallinity and other structural parameters of materials. In this work the brief description of XRD techniques employed in quantitative analysis and its current applications have been discussed. Keywords: XRD, crystal structures, crystallite size, degrees of crystallinity, quantitative analysisCite this Article Gunashekar GS, Krishna M. An Overview on Powder X-Ray Diffraction and Its Current Applications. Research & Reviews: Journal of Physics. 2015; 4(3): 6–10p.
      PubDate: 2015-12-14
      Issue No: Vol. 4 (2015)
  • Response of Magnetic Field by Conduction Electrons at Low Temperature in
    • Authors: I Naik
      Abstract: Here, we have presented the magneto-resistance (MR) on polycrystalline and single crystal of 2H-NbSe2. The obtained MR on single crystal shows anisotropic nature associated with small longitudinal MR i.e.  in which  direction of current flow compared to transverse MR i.e.  in which ^ direction of current flow. This anisotropy behaviour is associated with the complex Fermi surface found from the analysis of two-band model and Kohler’s rule. Keywords: Transition metal compound, magneto-resistance, two-band model, Kohler’s ruleCite this Article I. Naik. Response of Magnetic Field by Conduction Electrons at Low Temperature in 2H-NbSe2. Research & Reviews: Journal of Physics. 2015; 4(3): 1–5p.

      PubDate: 2015-10-26
      Issue No: Vol. 4 (2015)
  • Potential Energy Surface for 190-198Hg Isotopes
    • Authors: Kahtan A. Hussain, Musa K. Mohsin, Fadhil I. Sharrad
      Abstract: The 190-198Hg isotopes with proton number Z=80 and neutron numbers (n) between 110 and 118 in O(6) region were investigated. The potential energy surface has been calculated within the framework using interacting boson model (IBM-1). The contour plot of the potential energy surfaces shows that the interested nuclei are deformed and have γ-unstable-like characters. Keywords: IBM-1, O(6), Hg isotopes, Potential energy surfaceCite this Article Kahtan A. Hussain. Musa K. Mohsin,  Fadhil I. Sharrad, Potential Energy surface for 190-198Hg Isotopes. Research & Reviews: Journal of Physics (RRJoPHY) 2015; 4(2): 14–18p.

      PubDate: 2015-07-29
      Issue No: Vol. 4 (2015)
  • A Review of the Use of Super Kamiokande to Determine Atmospheric Neutrino
    • Authors: A. Bala
      Abstract: Super Kamiokande is a large water Cherenkov detectors situated at kamioka town in Japan. It was commissioned in 1996 and data taken began since then. The sole aim of this detector is to study atmospheric neutrinos, solar neutrinos, sterile neutrinos search for proton decays and other astrophysical sources. Lots of significant progress has been made during recent years in understanding of neutrino oscillation. This paper reports some findings of atmospheric neutrino oscillation using data taken from super kamiokande and other detectors of similar purpose. It also highlights some of the future projects based on this research area. Keywords: Kamiokande, neutrino, atmospheric, oscillationCite this Article Bala A, A Review of the Use of Super Kamiokande to Determine Atmospheric Neutrino Oscillations, Research & Reviews: Journal of Physics (RRJoPHY) 2015; 4(2): 19–24p.

      PubDate: 2015-07-29
      Issue No: Vol. 4 (2015)
  • Kinetics of Non-isothermal Crystallization of Ge-Se-Sn Chalcogenide
    • Authors: Anusaiya Kaswan, Vandana Kumari, D. Patidar, N. S. Saxena, Kananbala Sharma
      Abstract: The calorimetric measurements of as-prepared Ge30-xSe70Snx (8≤x≤20) chalcogenide glasses have been performed using differential scanning calorimetery (DSC) at five different heating rates (10, 15, 20, 25 and 30 Kmin-1) under non-isothermal conditions. These non-isothermal calorimetric measurements have been analyzed in terms of activation energy (Ec), Avrami exponent, dimensionality of growth, frequency factor, Ko(sec-1), half time of crystallization,t1/2(min) and crystallization rate parameter. These kinetic parameters have been evaluated using different theoretical approaches such as; Kissinger model, Ozawa model, Augis-Bennett, Matusita model, Gao-Wang model, Avrami model and Mo׳s approach. It has been observed that the activation energy of crystallization Ec (KJmole-1) is composition dependent. The activation energy decreases with increasing Sn content due to the decreasing rate of crystallization. It has also been observed that the half-time of crystallization decreases with increasing heating rate because when heating rate increases crystallization rate become faster. Keywords: Avrami exponent, Half-time of crystallization, Frequency factorCite this Article Anusaiya Kaswan, Vandana Kumari, Patidar D et al. Kinetics of non-isothermal crystallization of Ge-Se-Sn Chalcogenide Glasses, Research & Reviews: Journal of Physics (RRJoPHY) 2015; 4(2): 25–34p.
      PubDate: 2015-07-29
      Issue No: Vol. 4 (2015)
  • Structural Properties of Spin Coated Multilayered Cupric Oxide Thin Films
    • Authors: P. Samarasekara, N. G. K. V. M. Premasiri
      Abstract: CuO thin films were spin-coated at 1500, 2200 and 2400 rpm for 30 sec, and subsequently annealed at 150–550°C for 1 h. Multi-layered CuO thin films were prepared including three and five layers. These thin films were characterized using XRD, Fourier-Transform Infrared Spectroscopy (FTIR) and polarizing light microscopy. The XRD and FTIR analysis confirmed the crystallization of CuO phase in thin films annealed above 350°C, and corresponding crystallite sizes were observed to be increasing with the annealing temperature. The Scherrer formula was applied for (111) and peaks of XRD patterns of CuO thin films. According to the data of peak, average crystallite size increased from 0.801 to 55.20A as annealing temperature was increased from 350 to 500°C. In FTIR spectrum, peak corresponding to Cu-O bond appeared at wavelength of 532.4 cm-1above annealing temperature of 350°C. Keywords: Spin coating, CuO, XRD, FTIR, StructureCite this Article Samarasekara P, Premasiri NGKVM. Structural Properties of Spin Coated Multilayered Cupric Oxide Thin Films. Research & Reviews: Journal of Physics (RRJoPHY). 2015; 4(2): 8–13p.
      PubDate: 2015-06-22
      Issue No: Vol. 4 (2015)
  • Quantitative Study of Deformations using Electronic Speckle Pattern
           Interferometer (ESPI)
    • Authors: P. P. Padghan, K. M. Alti
      Abstract: This paper discusses a research proposal to use temporal phase shifting technique of Electronic Speckle Pattern Interferometer (ESPI) for qualitative and quantitative study of deformations of various kinds. Proposed method for quantitative study is a five step phase shifting algorithm for extraction of phase information from the deformed object. Mechanical and thermal deformations in metallic thin films, metal plates and acoustic deformations are been planned for the study. Keywords: Temporal phase shifting Electronic Speckle Pattern Interferometer (ESPI), five step phase shifting algorithm, mechanical and thermal deformations Cite this Article P. P. Padghan & K. M. Alti. Quantitative Study of Deformations using Electronic Speckle Pattern Interferometer (ESPI). Research & Reviews: Journal of Physics (RRJoPHY). 2015; 4(2): 1-7p 
      PubDate: 2015-06-10
      Issue No: Vol. 4 (2015)
  • Fabrication and parametric analysis of Thermal Sensing Dielectric PZT
           thick film nano ceramic Device developed by SOL GEL technique
    • Authors: Kushal Roy
      Abstract: Abstract Extensive investigation carried out during earlier half of twentieth century, prominently established that the ionic radius of an atom gets reduced to significant levels with decrease in coordination number. The findings of Goldsmith and Pauling [1] showed that ionic radii contracts by 4%,6% and 12% when coordination number is reduced from 12 to 8, 6 and 4 respectively[2]. It is obvious that coordination number reduction takes place at the surface partly owing to surface tension phenomena [3]. Recent past has seen extensive study in this field as it is realized that it plays a vital role in oxygen chemisorption [4], hence affecting various material properties when nano scaled particle size is considered. Pb[Zrx,Ti(1-x)]O3, popularly known as PZT has remained a point of attraction for the scientists and researchers in the field of synthetically developed Engineering Material since its discovery by Jaffe et. al. Last few decades have seen various devices like miniature relays[4], smart structures[5], memories[5]etc all utilizing, to a major extent the well known piezoelectric and pyroelectric properties found in PZT. After being reported about various parametric changes in piezoelectric coefficient, polarization and dielectric constant K by addition of some foreign ions lead to the further classification of PZTs as hard and soft PZTs. As reported by various authors, soft PZTs have highly enhanced piezoelectric properties which makes them highly suitable for fabrication of various electrical and electronic devices owing to high gain and better response, but on the other hand hard PZTs are reported to have highly decreased dielectric constants and piezoelectric coefficients leading their incapability to serve as a affective material for fabrication of actuators [6]. However a considerable linearity in the variation of K is reported in these hard doped materials [7], which can indirectly be utilized for other low gain and low response systems. It is also been reported that when miniaturizing a device, the grain size plays a important role in governing various parameters like dielectric constant, curie temperature, polarization etc of the composite material. Due to the complexity and various independent constraints involved, the origin of grain size effect is yet to be understood well [8]. In the presented work, the author investigates the nature of variation in curie temperature, dielectric constant, and polarization of the composite material Pb[Zrx,Ti(1-x)]O3, for x = 0.6, 0.7 and 0.8 and the effect of hard dopant Mg+2, with a objective to develop a composite solid solution of hard doped PZT which can be used as a temperature sensing element, when incorporated in a capacitive arrangement using simple electronic circuitry. Some interesting results are hereby obtained when the variation of polarization, dielectric constant and curie temperature is studied in detail with the variation in grain size.   Key Words: PZT thermal sensors, XRD, hard doping, SOL-GEL fabrication technique.
      PubDate: 2015-04-10
      Issue No: Vol. 4 (2015)
  • Photo-degradation in Nanocrystalline Porous Silicon
    • Authors: S.C. Agarwal
      Abstract: We study the metastabilities created by light soaking (LS) in nanocrystalline porous silicon (nc-PSi), prepared by the electrochemical anodization technique. At first sight, these appear similar to the effects of LS observed in hydrogenated amorphous silicon (a-Si:H) prepared by PECVD (Plasma-enhanced chemical vapor deposition) method. In nc-PSi, the ESR (Electron Spin Resonance) and Raman results indicate the presence of a-Si:H. This suggests a-Si:H as a possible cause of photo-degradation in nc-PSi. A careful look, however, reveals the differences. Amongst these is the finding that a polymer coating on nc-PSi is found to stabilize it against LS, but does so only partially for a-Si:H. This and several other experiments seem to indicate that the LS in nc-PSi affects the surface, whereas it is generally regarded to be a bulk effect in a-Si:H. We discuss these and related puzzles and suggest their possible explanations.Keywords: Light induced degradation, amorphous silicon, nanocrystalline silicon, porous silicon, Staebler Wronski effect, photodegradationCite this Article: Agarwal SC. Photo-degradation in Nanocrystalline Porous Silicon. Research & Reviews: Journal of Physics. 2015; 4(1): 22–30p.
      PubDate: 2015-04-07
      Issue No: Vol. 4 (2015)
  • Studies on Effect of Varying Geometric Parameters of Solar Receiver Tube
           on Thermal Loss Suffered By It
    • Authors: Arun Madival, Jai Kumar S., Sudeshkumar C.A., Vishalreddy ., M.R. Srinivas, M.S. Krupashankara
      Abstract: The radiative and convective heat losses from a solar receiver tube at a given operating temperature are a function of temperature of the outer glass envelope and outer surface area of the glass envelope. But the temperature of the outer glass envelope and its outer surface area are themselves a function of outer diameter of the heat pipe enclosed within the glass envelope and the annular gap between the outer surface of the heat pipe and the inner surface of the glass envelope. Hence the thermal losses associated with the receiver tube are a function of the size (outer diameter) of the heat pipe, annular gap between the glass envelope and the heat pipe, the operating temperature of the receiver tube. Theoretical thermal model is developed that describes various heat transfer phenomenon taking place in the solar receiver tube, under valid physical assumptions. Theoretical heat loss investigation is conducted by varying the values of outer diameter of the heat pipe (25–75 mm) and annular gap (25–75 mm) at three different operating temperatures of the receiver tube: 150, 300 and 450°C respectively, employing the thermal model developed. The radiative, convective and hence total losses associated with a solar receiver tube are quantified. The effect of varying the geometric parameters of the receiver tube on the heat loss suffered by it is studied.Keywords: Solar receiver tube, operating temperature, thermal losses, annular gapCite this Article: Arun Madival, Jai Kumar S, Sudeshkumar CA, Vishalreddy, Srinivas MR, Krupashankara MS. Studies on Effect of Varying Geometric Parameters of Solar Receiver Tube on Thermal Loss Suffered By It. Research & Reviews: Journal of Physics. 2015; 4(1): 10–21p.
      PubDate: 2015-03-30
      Issue No: Vol. 4 (2015)
  • Design and Control of Conveyors with Buffer System and Integrated Drilling
           using PLC
    • Authors: Raziuddin Annsari K., Prithvi Mahabaleshwara, Kundan Kumar, Jha Dadhichi, Subhadra Binod
      Abstract: Conveyors are one of the most widely used means of moving the product almost everywhere. The result of design and control of conveyor with buffer system and integrated drilling system using PLC helps to solve the problem of overload of conveyor system and packaging unit, never effects the production and avoids the complete shutdown of the entire system. Conveyor system is designed such that the production rate has the maximum efficiency by keeping time constraints in mind. The shutdown problem being hindered due to malfunction of the conveyors is tackled using the buffer system and dual-speed conveyors. If one of the belt suffers from a malfunction the speed of the other belts increases so as to accommodate the extra incoming work pieces. The buffer conveyor belt gets activated when more than one output conveyor belts goes off. The intelligent distributer only distributes to running conveyors. It also provides enough time for the malfunctioned conveyors to get back to working condition without hindering the on-going process. Drilling process indicates one of the various processes that take place in the industry.Keywords: Buffer, production unit, packaging unit, shutdown, distributer, drillingCite this Article: Raziuddin Annsari K, Prithvi Mahabaleshwara, Kundan Kumar, et al. Design and Control of Conveyors with Buffer System and Integrated Drilling Using PLC. Research & Reviews: Journal of Physics. 2015; 4(1): 7–9p.
      PubDate: 2015-03-27
      Issue No: Vol. 4 (2015)
  • Anti-synchronization of Bhalekar–Gejji Chaotic System via Nonlinear
           Active Control
    • Authors: Singh Jay Prakash, Singh Piyush Pratap, Roy B.K.
      Abstract: In this paper, a scheme of global anti-synchronization between two identical newly developed Bhalekar–Gejji chaotic system is proposed. This anti-synchronization scheme is achieved by using nonlinear active control since the parameters of both the systems are known and states are measurable. Lyapunov stability theory is used to ensure stability of error dynamics. Controller is designed by using the sum of relevant variables in master and slave chaotic systems. Simulation results reveal that proposed scheme is working satisfactorily.Keywords: Bhalekar–Gejji chaotic system, synchronization, anti-synchronization, nonlinear active control, lyapunov stabilityCite this Article: Prakash SJ, Pratap SP, Roy B. Anti-synchronization of Bhalekar–Gejji Chaotic System via Nonlinear Active Control. Research & Reviews: Journal of Physics. 2015; 4(1): 1–6p.
      PubDate: 2015-02-28
      Issue No: Vol. 4 (2015)
  • Simulation and Analysis of Static Synchronous Series Compensator
    • Authors: G. D Kamalapur, V. R. Sheelavant, Shobha M.N., Snehal Kanakal, Surekha Dhotre, Swetha B.
      Abstract: With the increasing size and complexity of the transmission networks, the performance of the power systems decreases due to problems related with the load flow, power oscillations and voltage quality. Flexible ac transmission (FACTS) offers effective schemes to meet these demands. FACTS technology increases power grid delivery capability and removes identified network bottlenecks. An attempt is made in this paper to study a FACT scheme static synchronous series compensator (SSSC), modelling with SIMULINK, voltage regulation and reactive power aspects.Keywords: FACTS, SSSC, transmission
      PubDate: 2015-01-09
      Issue No: Vol. 3 (2015)
  • Adaptive Control Scheme for Anti-synchronization of Identical
           Bhalekar-Gejji Chaotic Systems
    • Authors: Singh Piyush Pratap, Singh Jay Prakash, Roy. B K
      Abstract: This paper addresses the anti-synchronization problem of two Bhalekar-Gejji Chaotic systems in the presence of unknown system parameters. Based on Lyapunov stability theory an adaptive control law is devised to make the states of two identical Bhalekar-Gejji chaotic systems with unknown system parameters asymptotically synchronized. Finally, numerical simulations are presented to show the effectiveness of the proposed chaos anti-synchronization scheme and the objective. 
      PubDate: 2015-01-06
      Issue No: Vol. 3 (2015)
  • The Non-Local Aspects of Two Different Quantum Correlations Quantum
           Discord and Measurement Induced Non-locality
    • Authors: Amit Bhar
      Abstract: Quantum discord and measurement induced non-locality (MIN) have a deep impact on the context of quantification of quantumness of correlations in composed quantum systems as well as the non-local aspects of the quantum states. In this paper, we have tried to investigate and visualize the evolution of non-local aspects of these quantumness measurers. The underline motivation is to reestablish quantum discord and MIN as non-local measures.Keywords: LOCC, entanglement, discord, measurement induced non-locality(MIN), quantum channels
      PubDate: 2014-11-14
      Issue No: Vol. 3 (2014)
    • Authors: B Manoj
      Abstract: Large scale production of pure carbon spheres, with diameter from 27 to 108 nm, has been achieved via direct thermal decomposition of kerosene and diesel in the absence of catalyst. Microstructure of carbon black is also investigated for comparison purpose. The resulting material has been characterized using UV-Vis-NIR spectroscopy, FTIR, XRD and SEM-EDS. The UV-Vis-NIR spectrum reveals absorption peaks in the region 900–1500 nm are due to the lowest E11 sub-band absorption; whereas those in the 550–900 nm regions correspond to second E22 sub-band transitions. In the spectra, absorption peaks at 233, 232 and 229 nm are attributed to π-π* transition of the C=C bonding. The samples show two distinct, highly intense peaks at ~24º and a slightly broadened peak around 42º due to (002) and (010) reflections of graphite, respectively. The peaks at 3431 and 1047 cm-1 were assigned to O–H and C–O stretching vibrations, respectively. The band observed at 1619 cm-1 manifest the skeletal vibrations from graphitic domains and hence indicates the presence of crystalline graphitic carbon. The absorption bands at 2920 and 2850 cm-1 are because of the existence of aliphatic groups in the soot sample. The SEM analysis shows that the carbon spheres formed consist of agglomerated spheres.
      Keywords: Carbon spheres, Hydrocarbon soot, Graphene, Carbon, Aromaticity
      PubDate: 2014-11-06
      Issue No: Vol. 3 (2014)
  • Compositional and Optical Properties of Sb Doped ZnO Thin Films
    • Authors: Bhuiyan M. R. A., Begum J., Hoq E.
      Abstract: Sb doped ZnO thin films were deposited onto cleaned glass substrates at different substrate temperature by using thermal evaporation method in vacuum. The atomic compositions of the grown films have been determined by Energy Dispersive Analysis of X-ray (EDAX) method by using an attachment to the Scanning Electron Microscope. The optical properties were measured in the photon wavelength ranging in between 300 and 2500 nm by using a UV-VIS-NIR spectrophotometer. An EDAX spectrum reveals that Sb is doped into the ZnO thin films. The film shows higher transmittance in infrared regions and reflectance in UV regions. The films have high absorption co-efficient (~105 cm1) above the fundamental absorption region that direct allowed transitions band gap. The band gap energy of the films found from 2.409 to 2.929 eV for substrate temperature variation.
      Keywords: Sb doped ZnO, Compositional properties, Optical properties, Band gap energy
      PubDate: 2014-09-11
      Issue No: Vol. 3 (2014)
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