2,026 results on '"Bhardwaj, Sudhir"'
Search Results
2. Variation of elliptic flow with linear momentum for Au+Au at energy 200 GeV/A
- Author
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Bhardwaj Sudhir, Agnihotri Ashish, Keswani Bright, and Somani Ajit Kumar
- Subjects
Nuclear physics ,Physics ,Elliptic flow ,Observable ,Plasma ,Center of mass ,Nuclear Experiment ,Variation (astronomy) ,Collision ,Energy (signal processing) ,Gluon - Abstract
The ultra-relativistic heavy ion collision has been suggested as a unique way to create and study hot and dense matter at high temperature and density. Elliptic flow coefficient is important observable in search of such a hot and dense matter, known asQuark Gluon Plasma. The variation of elliptic flow coefficient with linear momentum were studied using events generated by AMPT for Au+Aucollisions at center of mass energy of 200 GeV/A. We compared the simulated data results with RHIC-PHENIX experimental results.
- Published
- 2018
3. Parameterization and study of elliptic flow coefficient for Au+Au and Cu+Cu collisions at RHIC energy 200 GeV/A
- Author
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Somani Ajit Kumar, Bhardwaj Sudhir, Keswani Bright, and Agnihotri Ashish
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Nuclear physics ,Physics ,Quantitative Biology::Neurons and Cognition ,Simulated data ,Quark–gluon plasma ,Elliptic flow ,Observable ,Center of mass ,Expected value ,Nuclear Experiment ,Energy (signal processing) - Abstract
Elliptic flow coefficient is important observable in search of Quark Gluon Plasma. The variation of elliptic flow coefficient with centrality were studied using events generated by AMPT (Default) for Au+Au and Cu+Cu collisions at center of mass energy of 200 GeV/A. We compared the simulated data results with RHIC-PHENIX experimental results and found close agreement between them. The study of the variation of the v2 for Au+Au and Cu+Cu was parameterized by fitting. We proposed a new formula to predict the expected value of v2 at particular centrality for Au+Au or Cu+Cu at 200 GeV/A.
- Published
- 2018
4. From fluid dynamics to microscopic transport approach
- Author
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Saini, Abhilasha, primary, Bhardwaj, Sudhir, additional, and Keswani, Bright, additional
- Published
- 2018
- Full Text
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5. The QCD matter; perturbation and lattice gauge theory
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Saini, Abhilasha, primary, Bhardwaj, Sudhir, additional, and Keswani, Bright, additional
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- 2018
- Full Text
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6. Elliptic flow due to charged hadrons for Au+Au collisions at RHIC energy 62.4 GeV
- Author
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Bhardwaj Sudhir, Agnihotri Ashish, and Somani Ajit Kumar
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Nuclear physics ,Physics ,Range (particle radiation) ,Particle physics ,Pseudorapidity ,Quark–gluon plasma ,Hadron ,Elliptic flow ,High Energy Physics::Experiment ,Center of mass ,Nuclear Experiment ,Nucleon ,Event generator - Abstract
Elliptic flow is an important observable in search of Quark Gluon Plasma. The elliptic flow parameter dependence on centrality due to charged hadrons were studied using events generated by event generator AMPT at center of mass energy of 62.4 GeV per nucleon pair for Au+Au collisions. This study performed for pseudorapidity range from −0.35 to 0.35 and transverse momentum bins pt = 0.2 to 1 GeV/c and 1 to 2 GeV/c. We compared the results obtained from simulated data and RHIC-PHENIX data.
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- 2016
7. The QCD matter; perturbation and lattice gauge theory.
- Author
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Saini, Abhilasha, Bhardwaj, Sudhir, Keswani, Bright, Shekhawat, Manoj Singh, and Suthar, Bhuvneshwer
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LATTICE theory , *QUARK matter , *PHASE transitions , *HADRONS , *GAUGE field theory , *QUARK-gluon plasma - Abstract
In this review we are watching towards the probes of quark gluon plasma which provides the unique option to create such nuclear stuff at controlled laboratory conditions. The observables from hadronic and leptonic residues provide the required information. The other tool is the detailed rapidity and momentum spectra of hadrons. Here the information regarding the de-confined phase transition and chiral symmetry restoration is mentioned; also the perturbation and lattice gauge theory is described in short. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
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8. Board Committee: 2nd International Conference on Condensed Matter & Applied Physics (ICC-2017).
- Author
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Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
- Subjects
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CONDENSED matter physics , *CONFERENCES & conventions , *LOW density polyethylene , *DIELECTRIC materials , *DIPOLE moments - Published
- 2018
- Full Text
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9. Dispersion equation for electrostatic ion cyclotron instability under the effect of ionization in a dusty plasma.
- Author
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Singh, Sukhmander, Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
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DUSTY plasmas ,PLASMA diffusion ,CYCLOTRONS ,DISPERSION (Chemistry) ,PLASMA instabilities ,IONS ,ELECTRON plasma - Abstract
In the present paper we derive the plasma dispersion equation under the effect of ionization rate in a dust plasma to investigate the electrostatic ion cyclotron instability, where dust charge fluctuation is absent. It has one of the lowest threshold drift velocities among all the current-driven instabilities in isothermal plasma. The Electrostatic ion cyclotron instability in a dusty plasma containing electrons, light ions, and massive negatively charged dust grains which can be investigated both experimentally and theoretically. [ABSTRACT FROM AUTHOR]
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- 2018
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10. Thermal radiation influence on MHD flow of a rotating fluid with heat transfer through EFGM solutions.
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Prasad, D. V. V. Krishna, Chaitanya, G. S. Krishna, Raju, R. Srinivasa, Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
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ROTATING fluid ,HEAT transfer fluids ,HEAT radiation & absorption ,FLUID flow ,MAGNETOHYDRODYNAMICS ,FLOW velocity ,NATURAL heat convection - Abstract
The aim of this research work is to find the EFGM solutions of the unsteady magnetohydromagnetic natural convection heat transfer flow of a rotating, incompressible, viscous, Boussinesq fluid is presented in this study in the presence of radiative heat transfer. The Rosseland approximation for an optically thick fluid is invoked to describe the radiative flux. Numerical results obtained show that a decrease in the temperature boundary layer occurs when the Prandtl number and the radiation parameter are increased and the flow velocity approaches steady state as the time parameter
t is increased. These findings are in quantitative agreement with earlier reported studies. [ABSTRACT FROM AUTHOR]- Published
- 2018
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11. MHD free convection heat transfer couette flow in rotating system.
- Author
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Reddy, G. Jithender, Manideep, P., Raju, R. Srinivasa, Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
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ROTATIONAL motion ,NATURAL heat convection ,HEAT convection ,COUETTE flow ,HEAT transfer ,FREE convection - Abstract
The unsteady hydromagnetic free convection heat transfer couette flow, viscous incompressible electrically conducting fluid in a rotating system has been considered. A Finite Element Method (FEM) employed to find the numerical solutions of the dimentionless governing copuled PDEs with suitable boundary conditions. The primary, secodary velocity and temperature have been obtained. These are shown graphical form. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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12. Structural, dielectric and ferroelectric studies of BZT doped Mg0.2Cu0.3Zn0.5Fe2O4 magnetoelectric composites.
- Author
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Khader, S. Abdul, Parveez, Asiya, Giridharan, N. V., Sankarappa, T., Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
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LEAD titanate ,FIELD emission electron microscopes ,ZIRCONIUM compounds ,DIELECTRICS ,DIELECTRIC properties ,FERRITES ,HYSTERESIS loop ,SURFACE morphology - Abstract
The composites of ferrite-ferroelectric system (x) Mg
0.2 Cu0.3 Zn0.5 Fe2 O4 + (1-x) Ba0.8 Zr0.2 TiO3 (x=15%, 30%, 45%) were synthesized by sintering mixtures of ferroelectric Ba0.8 Zr0.2 TiO3 (BZT) and ferrite component Mg0.2 Cu0.3 Zn0.5 Fe2 O4 (MCZF). The presences of two phases in magneto-electric composites were probed by X-ray diffraction (XRD) studies. The peaks observed in the XRD spectrum indicated spinel cubic structure for MCZF ferrite and tetragonal perovskite structure for BZT and, both spinel and pervoskite structures for synthesized composites. Surface morphology of the samples has been investigated using Field Emission Scanning Electron Microscope (FESEM). Frequency dependent dielectric properties of synthesized composites were measured from 100 Hz to 1 MHz at RT using HIOKI LCR HI-TESTER. The dielectric dispersion is observed at lower frequencies for the synthesized ME composites. The ferroelectric properties of synthesized composites were analyzed using a Precision ferroelectric tester. It is observed that the composites exhibited ferroelectric hysteresis with wide loops indicating lossy nature of composites. [ABSTRACT FROM AUTHOR]- Published
- 2018
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13. Charge transport through DNA based electronic barriers.
- Author
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Patil, Sunil R., Chawda, Vivek, Qi, Jianqing, Anantram, M. P., Sinha, Niraj, Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
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BASE pairs ,DENSITY functional theory ,IONIZATION energy ,ELECTRONIC structure ,NUCLEOTIDE sequence - Abstract
We report charge transport in electronic ’barriers’ constructed by sequence engineering in DNA. Considering the ionization potentials of Thymine-Adenine (AT) and Guanine-Cytosine (GC) base pairs, we treat AT as ’barriers’. The effect of DNA conformation (A and B form) on charge transport is also investigated. Particularly, the effect of width of ’barriers’ on hole transport is investigated. Density functional theory (DFT) calculations are performed on energy minimized DNA structures to obtain the electronic Hamiltonian. The quantum transport calculations are performed using the Landauer-Buttiker framework. Our main findings are contrary to previous studies. We find that a longer A-DNA with more AT base pairs can conduct better than shorter A-DNA with a smaller number of AT base pairs. We also find that some sequences of A-DNA can conduct better than a corresponding B-DNA with the same sequence. The counterions mediated charge transport and long range interactions are speculated to be responsible for counter-intuitive length and AT content dependence of conductance of A-DNA. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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14. First principle investigation of structural and optical properties of cubic titanium dioxide.
- Author
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Dash, Debashish, Chaudhury, Saurabh, Tripathy, Susanta K., Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
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TITANIUM dioxide ,OPTICAL properties ,ATOMIC orbitals ,LATTICE constants ,DENSITY functional theory - Abstract
This paper presents an analysis of structural and optical properties of cubic titanium dioxide (TiO
2 ) using Orthogonalzed Linear Combinations of Atomic Orbitals (OLCAO) basis set under the framework of Density Functional Theory (DFT). The structural property, specially the lattice constant ‘a’ and the optical properties such as refractive index, extinction coefficient, and reflectivity are investigated and discussed in the energy range of 0-16eV . Further, the results have compared with previous theoretical as well as with experimental results. It was found that DFT based simulation results are approximation to experimental results. [ABSTRACT FROM AUTHOR]- Published
- 2018
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15. Temperature analysis of laser ignited metalized material using spectroscopic technique.
- Author
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Bassi, Ishaan, Sharma, Pallavi, Daipuriya, Ritu, Singh, Manpreet, Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
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IGNITION temperature ,LASERS ,LASER spectroscopy ,TEMPERATURE measurements ,LASER measurement ,MATERIALS ,TEMPERATURE - Abstract
The temperature measurement of the laser ignited aluminized Nano energetic mixture using spectroscopy has a great scope in in analysing the material characteristic and combustion analysis. The spectroscopic analysis helps to do in depth study of combustion of materials which is difficult to do using standard pyrometric methods. Laser ignition was used because it consumes less energy as compared to electric ignition but ignited material dissipate the same energy as dissipated by electric ignition and also with the same impact. Here, the presented research is primarily focused on the temperature analysis of energetic material which comprises of explosive material mixed with nano-material and is ignited with the help of laser. Spectroscopy technique is used here to estimate the temperature during the ignition process. The Nano energetic mixture used in the research does not comprise of any material that is sensitive to high impact. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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16. Electron transport in ethanol & methanol absorbed defected graphene.
- Author
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Dandeliya, Sushmita, Srivastava, Anurag, Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
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ELECTRON transport ,METHANOL ,ETHANOL ,GRAPHENE ,DENSITY functional theory ,METHANOL as fuel - Abstract
In the present paper, the sensitivity of ethanol and methanol molecules on surface of single vacancy defected graphene has been investigated using density functional theory (DFT). The changes in structural and electronic properties before and after adsorption of ethanol and methanol were analyzed and the obtained results show high adsorption energy and charge transfer. High adsorption happens at the active site with monovacancy defect on graphene surface. Present work confirms that the defected graphene increases the surface reactivity towards ethanol and methanol molecules. The presence of molecules near the active site affects the electronic and transport properties of defected graphene which makes it a promising choice for designing methanol and ethanol sensor. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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17. Study of electrostatic electron cyclotron parallel flow velocity shear instability in the magnetosphere of Saturn.
- Author
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Kandpal, Praveen, Pandey, R. S., Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
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FRICTION velocity ,SHEAR flow ,FLOW velocity ,MAGNETOSPHERE ,DISPERSION relations ,ELECTRON cyclotron resonance sources ,CYCLOTRONS ,ELECTRON density - Abstract
In the present paper, the study of electrostatic electron cyclotron parallel flow velocity shear instability in presence of perpendicular inhomogeneous DC electric field has been carried out in the magnetosphere of Saturn. Dimensionless growth rate variation of electron cyclotron waves has been observed with respect to
k ⊥ ρ for various plasma parameters. Effect of velocity shear scale length (e A ), inhomogeneity (P/a), the ratio of ion to electron temperature (e T ) and density gradient (i /Te ε ) on the growth of electron cyclotron waves in the inner magnetosphere of Saturn has been studied and analyzed. The mathematical formulation and computation of dispersion relation and growth rate have been done by using the method of characteristic solution and kinetic approach. This theoretical analysis has been done taking the relevant data from the Cassini spacecraft in the inner magnetosphere of Saturn. We have considered ambient magnetic field data and other relevant data for this study at the radial distance of ∼4.82-5.00 Rs. In our study velocity shear and ion to electron temperature ratio have been observed to be the major sources of free energy for the electron cyclotron instability. The inhomogeneity of electric field caused a small noticeable impact on the growth rate of electrostatic electron cyclotron instability. Density gradient has been observed playing stabilizing effect on electron cyclotron instability. [ABSTRACT FROM AUTHOR]n ρe - Published
- 2018
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18. Oblique propagating electromagnetic ion – Cyclotron instability with A.C. field in outer magnetosphere.
- Author
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Pandey, R. S., Singh, Vikrant, Rani, Anju, Varughese, George, Singh, K. M., Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
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MAGNETOSPHERE ,PARTICLE tracks (Nuclear physics) ,CYCLOTRONS ,ELECTROMAGNETIC waves ,RADIATION belts ,PARTICLE interactions ,ELECTROMAGNETIC pulses - Abstract
In the present paper Oblique propagating electromagnetic ion-cyclotron wave has been analyzed for anisotropic multi ion plasma (H
+ , He+ , O+ ions) in earth magnetosphere for the Dione shell of L=7 i.e., the outer radiation belt of the magnetosphere for Loss-cone distribution function with a spectral index j in the presence of A.C. electric field. Detail for particle trajectories and dispersion relation has been derived by using the method of characteristic solution on the basis of wave particle interaction and transformation of energy. Results for the growth rate have been calculated numerically for various parameters and have been compared for different ions present in magnetosphere. It has been found that for studying the wave over wider spectrum, anisotropy for different values of j should be taken. The effect of frequency of A.C. electric field and angle which propagation vector make with magnetic field, on growth rate has been explained. [ABSTRACT FROM AUTHOR]- Published
- 2018
- Full Text
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19. Study of electron beam on electron cyclotron waves with AC field in the magnetosphere of Uranus.
- Author
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Kaur, Rajbir, Kumari, Jyoti, Pandey, R. S., Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
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MAGNETOSPHERE ,MAXWELL-Boltzmann distribution law ,CYCLOTRONS ,ELECTRON beams ,DISPERSION relations ,SPACE plasmas - Abstract
In this paper, we deal with the oblique electromagnetic electron cyclotron (EMEC) waves in the Uranus magnetosphere. The expression of the dispersion relation is plotted by using the method of the feature solution. After the kinetic method, the growth rate and the actual frequency of the EMEC wave are studied theoretically in the Uranian system. NASA, Voyager 2, the observed results of the space detectors show that the spin axes of the planets are abnormally oriented and that there are more particles in the high energy tail of the Uranian magnetospheric plasma. Therefore, this paper uses the Kappa distribution instead of the usual Maxwell distribution. The study extends to the tilt propagation of EMEC waves, which has a change in temperature anisotropy and propagation angle with respect to the direction of the magnetic field. These parameters were found to support the growth rate of EMEC waves. However, the response of the actual frequency of these waves is not the same as the rate of growth in all cases. These results apply to the detailed comparison of planetary studies of the space plasma environment and the magnetosphere system. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
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20. Mulliken’s populations and electron momentum densities of transition metal tungstates using LCAO scheme.
- Author
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Meena, B. S., Heda, N. L., Ahuja, B. L., Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
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ELECTRON density ,TRANSITION metals ,DENSITY functional theory ,TUNGSTATES ,CHARGE transfer - Abstract
We have computed the Mulliken’s populations (MP) and electron momentum densities (EMDs) for TMWO
4 (TM=Co, Ni, Cu and Zn) using linear combination of atomic orbitals (LCAO) scheme. The latest hybridization of Hartree-Fock (HF) and density functional theory (DFT) under the framework of LCAO approximations (so called WC1LYP and B1WC) have been employed. The theoretical EMDs have been compared with the available experimental data which show that WC1LYP scheme gives slightly better agreement with the experimental data for all the reported tungstates. Such trend shows the applicability of Lee-Yang-Parr (LYP) correlation energies within hybrid approximations in predicting the electronic properties of these compounds. Further, the MP data show the charge transfer from Co/Ni/Cu/Zn and W to O atoms. In addition, we have plotted the total EMDs at the same normalized area which show almost similar type of localization of 3d electrons (in real space) of Cu and Zn, which is lower than that of Ni and Co atoms in their tungstates environment. [ABSTRACT FROM AUTHOR]- Published
- 2018
- Full Text
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21. Structural and electronic properties of rectangular CdTe nanowire: A DST study.
- Author
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Khan, Md. Shahzad, Bhatia, Manjeet, Srivastava, Anurag, Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
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NANOWIRES ,SEMICONDUCTOR nanowires ,NANOWIRE devices ,DENSITY functional theory - Abstract
CdTe rectangular nanowire of different diameter in zinc-blende phase is investigated using density functional theory. Enhancement of diameter increased stability and improved electronic qualities suitable for device purpose applications. Cohesive energy per atom enhanced on enlarging diameter advocating the stability. Large diameter nanowire (22.62Å) exhibits bandgap of 1.21eV and electronic effective mass is observed to be 0.51m
e . The bonding between Cd-Te atoms are predominantly observed as covalent assuring its inertness towards moisture. [ABSTRACT FROM AUTHOR]- Published
- 2018
- Full Text
- View/download PDF
22. Determination of effective atomic number of biomedical samples using Gamma ray back-scattering.
- Author
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Singh, Inderjeet, Singh, Bhajan, Sandhu, B. S., Sabharwal, Arvind D., Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
- Subjects
MONTE Carlo method ,GAMMA rays ,SCINTILLATION counters ,ATOMIC number ,GAMMA ray spectrometry - Abstract
The study of effective atomic number of biomedical sample has been carried out by using a non-destructive multiple back-scattering technique. Also radiation characterization method is used to compare the tissue equivalent material as human tissue. Response function of 3
″ × 3″ NaI(Tl) scintillation detector is implemented on recorded pulse-height distribution to boost the counts under the photo-peak and help to reduce the uncertainty in the experimental result. Monte Carlo calculation for multiple back-scattered events supports the reported experimental work. [ABSTRACT FROM AUTHOR]- Published
- 2018
- Full Text
- View/download PDF
23. Effect of geomagnetic storms of different solar origin on the ionospheric TEC.
- Author
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Mansoori, Azad A., Khan, Parvaiz A., Purohit, P. K., Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
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MAGNETIC storms ,IONOSPHERE ,CORONAL mass ejections ,SOLAR cycle - Abstract
We have studied the behaviour of ionospheric Total Electron Content (TEC) at a mid latitude station Usuda (36.13
0 N, 138.360 E), Japan during intense geomagnetic storms which were observed during 23 solar cycle (1998-2006). For the present study we have selected 47 intense geomagnetic storms (Dst≤-100nT), for the given period, which were then categorised into four categories depending upon their solar and interplanetary sources like Magnetic Cloud (MC), Co-rotating Interaction Region (CIR), Sheath driven Interplanetary Coronal Mass Ejection (SH+ICME) and Sheath driven Magnetic cloud (SH+MC). From our study we found that the geomagnetic storms significantly affect the ionosphere having any of the solar origin. However the geomagnetic storms which are either caused by SH+MC or SH+ICME produced maximum effect in TEC. [ABSTRACT FROM AUTHOR]- Published
- 2018
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24. Electronic and optical properties of double perovskite Ba2VMoO6: FP-LAPW study.
- Author
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Hnamte, Lalhriatpuia, Sandeep, Joshi, Himanshu, Thapa, R. K., Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
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DIELECTRIC function ,OPTICAL conductivity ,REFRACTIVE index ,OPTICAL properties ,SEMIMETALS - Abstract
The calculation is carried out using the FPLAPW method in the DFT framework within mBJ and LDA using the WIEN2k code. The investigation of electronic properties showed Ba
2 VMo O6 to be semi-metal in spin-up and insulation in spin down. In both spin up and spin down channel, direct band gap along with indirect band gap in ΓX direction was observed. For investigation of the optical transitions in this compound, the real and imaginary parts of the dielectric function, reflectivity, refractive index and optical conductivity of real and imaginary parts are calculated and analysed. [ABSTRACT FROM AUTHOR]- Published
- 2018
- Full Text
- View/download PDF
25. Oxidative stress detection by MEMS cantilever sensor array based electronic nose.
- Author
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Gupta, Anurag, Singh, T. Sonamani, Singh, Priyanka, Yadava, R. D. S., Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
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ELECTRONIC noses ,SENSOR arrays ,OXIDATIVE stress ,MEMS resonators ,MICROELECTROMECHANICAL systems ,CANTILEVERS ,CHEMICAL detectors - Abstract
This paper is concerned with analyzing the role of polymer swelling induced surface stress in MEMS chemical sensors. The objective is to determine the impact of surface stress on the chemical discrimination ability of MEMS resonator sensors. We considered a case study of hypoxia detection by MEMS sensor array and performed several types of simulation experiments for detection of oxidative stress volatile organic markers in human breath. Both types of sensor response models that account for the surface stress effect and that did not were considered for the analyses in comparison. It is found that the surface stress (hence the polymer swelling) provides better chemical discrimination ability to polymer coated MEMS sensors. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
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26. Energy levels and life times calculations of Mo XXXI.
- Author
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Wajid, Abdul, Jabeen, S., Husain, Abid, Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
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QUANTUM electrodynamics - Abstract
Fine-structure energy levels belonging to 2p
6 3s2 , 2p6 3s3 p, 2p6 3p2 and 2p6 3p3d for Mo XXXI have been calculated using the multi-configuration Dirac–Fock method including Quantum electrodynamics (QED) corrections. Most of our calculations of energy levels show good agreement with experimental data available on NIST. Lifetimes for excited levels have also been calculated. [ABSTRACT FROM AUTHOR]- Published
- 2018
- Full Text
- View/download PDF
27. Integrated and differential quantum capacitance of graphene: A DFT study.
- Author
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Bhushan, Boddepalli Santhi, Srivastava, Anurag, Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
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ELECTRIC capacity ,ATOMIC orbitals ,PLANE wavefronts ,DENSITY functional theory - Abstract
We report the comparative analysis of integrated and differential quantum capacitance of grapheme, extracted from Plane Wave (PW) and Linear Combination of Atomic Orbitals (LCAO) based Density Functional Theory (DFT) calculators. A plane wave DFT code Quantum Espresso and LCAO DFT code Atomistix Toolkit have been utilized for the purpose. The results suggest that both the PW and LCAO calculators offer equivalent quantum capacitance for graphene, are in good agreement with other reports. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
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28. Molar extinction coefficient of organic compounds as a function of effective atomic number.
- Author
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Singh, Mohinder, Tondon, Akash, Sandhu, B. S., Singh, Bhajan, Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
- Subjects
ATOMIC number ,SCINTILLATION counters ,ORGANIC compounds ,MOLARS ,BIOLOGICAL extinction ,PHOTONS - Abstract
Molar extinction coefficients and mean free paths were measured for some organic compounds as a function of effective atomic number in a narrow beam geometry using NaI (Tl) scintillation detectors for low and medium energy gamma-ray photons. The values of molar extinction coefficient have been found to change with energy as well as with measured values of effective atomic number. Dosimetric characteristics of these parameters in different solutions have also been explored in this context. Our experimental results are in good agreement with the theoretical results. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
29. Wideband dual frequency modified ellipse shaped patch antenna for WLAN/Wi-MAX/UWB application.
- Author
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Jain, P. K., Jangid, K. G., R. Sharma, B., Saxena, V. K., Bhatnagar, D., Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
- Subjects
IEEE 802.16 (Standard) ,WIRELESS communications ,ANTENNAS (Electronics) ,DIELECTRIC resonator antennas ,MICROSTRIP transmission lines - Abstract
This paper communicates the design and performance of microstrip line fed modified ellipses shaped radiating patch with defected ground structure. Wide impedance bandwidth performance is achieved by applying a pentagonal slot and T slot structure in ground plane. By inserting two semi ellipses shaped ring in ground, we obtained axial ratio bandwidth approx 600 MHz. The proposed antenna is simulated by utilizing CST Microwave Studio simulator 2014. This antenna furnishes wide impedance bandwidth approx. 4.23 GHz, which has spread into two bands 2.45 GHz - 5.73 GHz and 7.22 GHz – 8.17 GHz with nearly flat gain in operating frequency range. This antenna may be proved as a practicable structure for modern wireless communication systems including Wi-MAX, WLAN and lower band of UWB. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
30. CPW fed UWB antenna with enhanced bandwidth & dual band notch characteristics.
- Author
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Jangid, K. G., Jain, P. K., Sharma, B. R., Saxena, V. K., Kulhar, V. S., Bhatnagar, D., Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
- Subjects
ANTENNA feeds ,ULTRA-wideband antennas ,ULTRA-wideband communication ,WIRELESS communications ,BANDWIDTHS ,METAMATERIAL antennas - Abstract
This paper reports the design and performance of CPW fed UWB antenna having two U–shaped slots etched in the radiating structure. UWB performance of proposed structure is obtained through the truncated shape of the patch and L-slits etched in ground plane. By applying two U- shaped slots in a radiating patch, we achieved dual notch band characteristics. The proposed antenna is simulated by applying CST Microwave Studio simulator. This antenna provides wide impedance bandwidth of 12.585 GHz (2.74GHz - 15.325 GHz) with dual notched band characteristics. This antenna may be proved as a useful structure for modern wireless communication systems including UWB band. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
31. Study of MHD over a vertical plate in presence of free convection flow and hall current through EFGM solutions.
- Author
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Rao, J. Anand, Raju, R. Srinivasa, Bucchaiah, C. D., Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
- Subjects
FREE convection ,HEAT radiation & absorption ,UNSTEADY flow ,MASS transfer ,GALERKIN methods ,HEAT transfer - Abstract
In this paper, we have to find the numercial solutions of unsteady magnetohydrodynamic flow of an electrically conducting incompressible viscous dissipative fluid along an infinite vertical porous plate with heat absorption, heat and mass transfer. The problem is solved, numerically by element free galerkin method for velocity, temperature, concentration fields for different pertinent parameters on the flow field are physically interpreted and shown through graphs and tables. Numerical comparison is also presented between the existing published results as a special case of our study. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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32. Gamma rays shielding parameters for white metal alloys.
- Author
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Kaur, Taranjot, Sharma, Jeewan, Singh, Tejbir, Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
- Subjects
GAMMA rays ,BRITANNIA metal ,ALLOYS ,MASS attenuation coefficients ,CHROMIUM-cobalt-nickel-molybdenum alloys ,ELECTRON density - Abstract
In the present study, an attempt has been made to check the feasibility of white metal alloys as gamma rays shielding materials. Different combinations of cadmium, lead, tin and zinc were used to prepare quaternary alloys Pb
60 Sn20 Znx Cd20-x (where x = 5, 10, 15) using melt quench technique. These alloys were also known as white metal alloys because of its shining appearance. The density of prepared alloys has been measured using Archimedes Principle. Gamma rays shielding parameters viz. mass attenuation coefficient (µm ), effective atomic number (Zeff ), electron density (Nel ), Mean free path (mfp), Half value layer (HVL) and Tenth value layer (TVL) has been evaluated for these alloys in the wide energy range from 1 keV to 100 GeV. The WinXCom software has been used for obtaining mass attenuation coefficient values for the prepared alloys in the given energy range. The effective atomic number (Zeff ) has been assigned to prepared alloys using atomic to electronic cross section ratio method. Further, the variation of various shielding parameters with photon energy has been investigated for the prepared white metal alloys. [ABSTRACT FROM AUTHOR]- Published
- 2018
- Full Text
- View/download PDF
33. QPO detection in superluminal black hole GRS 1915+105.
- Author
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Bhulla, Yashpal, Jaaffrey, S. N. A., Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
- Subjects
QUALITY factor ,POWER density ,EDDINGTON mass limit ,POWER spectra ,LIGHT curves ,BLACK holes - Abstract
We report on the first superluminal Black Hole GRS 1915+105 observed by the Rossi X-ray Timing Explorer - Proportion Counter Array (RXTE/PCA). We detect the Quasi Periodic Oscillations (QPOs) in the Power Density Spectrum (PDS) of source which have luminosity very near to Eddington limit and long variability in X-ray light curve. In power density spectrum, we deal with the study of highly variability amplitude, time evolution of the characteristic timescale, Quality Factor and Full Width at Half Maximum (FWHM). We find significant QPOs in 15 different observation IDs with frequency around 67 Hz although quality factor nearly 20 but in two IDs frequency is found just double. Typical fractional rms for GRS 1915+105 is dominating the hard band increasing steeply with energy more than 13% at 20-40 keV band. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
34. Functionalization and migration of bromine adatoms on zigzag graphene nanoribbons: A first-principles study.
- Author
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Jaiswal, Neeraj K., Kumar, Amit, Patel, Chandrabhan, Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
- Subjects
NANORIBBONS ,BROMINE ,ADATOMS ,FERMI level ,DIFFUSION - Abstract
Tailoring the electronic band gap of graphene nanoribbons (GNR) through edge functionalization and understanding the adsorption of guest adatoms on GNR is crucial for realization of upcoming organic devices. In the present work, we have investigated the structural stability and electronic property of bromine (Br) termination at the edges of zigzag GNR (ZGNR). The migration pathways of Br adatom on ZGNR have also been discussed along four different diffusion paths. It is revealed that Br termination induces metallicity in ZGNR and caused upward shifting of Fermi level. Further, the migration is predicted to take place preferable along the ribbon edges whereas across the ribbon width, migration is least probable to take place due to sufficiently higher migration barrier of ∼160 meV. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
35. Elastohydrodynamics of microfilament under distributed body actuation.
- Author
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Singh, T. Sonamani, Yadava, R. D. S., Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
- Subjects
ELASTOHYDRODYNAMICS ,CYTOPLASMIC filaments ,RESISTIVE force ,THRUST ,FIBERS - Abstract
The dynamics of an active filament in low Reynolds (Re) number regime is analyzed under distributed body actuation represented by the sliding filament model. The governing elastohydrodynamic equations are formulated by assuming the resistive force theory (RFT). The effect of geometric nonlinearity in bending stiffness on the propulsive thrust has been analyzed where the former is introduced by cross-sectional tapering. Two types of boundary conditions (clamped-free and hinged-free) are analyzed. A comparison with the uniform filament dynamics reveals that the tapering enhances the thrust under both types of boundary conditions. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
36. Identification of novel targets for HIV-1: Molecular dynamics simulation and binding energy calculations.
- Author
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Pandey, Vishnudatt, Tiwari, Gargi, Mall, Vijaya Shri, Tiwari, Rakesh Kumar, Ojha, R. P., Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
- Subjects
BINDING energy ,VIRAL envelope proteins ,COILS (Magnetism) ,IDENTIFICATION ,MOLECULAR dynamics ,TAILS - Abstract
HIV-1 envelope glycoprotein-mediated fusion is managed by the concerted coalescence of the HIV-1 gp41 N- and C- helical regions, which is a product in the formation of 6-helix bundles. These two regions are considered prime targets for peptides and antibodies that inhibit HIV-1 entry. There are so many rational method aimed to attach a rationally designed artificial tail to the C-terminus of HIV-1 fusion inhibitors to increase their antiviral potency. Here M. D. simulation was performed to go insight for study of C-terminal tail of Ile-Asp-Leu (IDL). [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
37. Formation of (DNA)2-LNA triplet with recombinant base recognition: A quantum mechanical study.
- Author
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Mall, Vijaya Shri, Tiwari, Rakesh Kumar, Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
- Subjects
DNA ,NUCLEIC acids ,MOLECULAR biology - Abstract
The formation of DNA triple helix offers the verity of new possibilities in molecular biology. However its applications are limited to purine and pyrimidine rich sequences recognized by forming Hoogsteen/Reverse Hoogsteen triplets in major groove sites of DNA duplex. To overcome this drawback modification in bases backbone and glucose of nucleotide unit of DNA have been proposed so that the third strand base recognized by both the bases of DNA duplex by forming Recombinant type(R-type) of bonding in mixed sequences. Here we performed Quanrum Mechanical (Hartree-Fock and DFT) methodology on natural DNA and Locked Nucleic Acids(LNA) triplets using 6-31G and some other new advance basis sets. Study suggests energetically stable conformation has been observed for recombinant triplets in order of G-C*G > A-T*A > G-C*C > T-A*T for both type of triplets. Interestingly LNA leads to more stable conformation in all set of triplets, clearly suggests an important biological tool to overcome above mentioned drawbacks. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
38. Shape coexistence and shape transition in light nuclei.
- Author
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Saxena, G., Kumawat, M., Singh, U. K., Kaushik, M., Jain, S. K., Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
- Subjects
BINDING energy ,NUCLEAR shapes ,GEOMETRIC shapes ,DEFORMATION of surfaces - Abstract
A systematic study has been performed to investigate the shape coexistence and shape transition for even-even nuclei between Z = 10-20 by employing Relativistic Mean-Filed plus BCS (RMF+BCS) approach. We calculate ground state properties viz. binding energy, deformation etc. for even-even nuclei to find the shape coexistence and shape transition. These results are found in agreement of recent experiments and consistent with other parameters of RMF and other theories. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
39. Length-dependent structural stability of linear monatomic Cu wires.
- Author
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Singh, Gurvinder, Kumar, Krishan, Singh, Baljinder, Moudgil, R. K., Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
- Subjects
STABILITY (Mechanics) ,WIRE ,DENSITY functional theory ,CLASS A metals ,CHEMICAL bond lengths - Abstract
We present first-principle calculations based on density functional theory for the finite-length monatomic Cu atom linear wires. The structure and its stability with increasing wire length in terms of number of atoms (N) is determined. Interestingly, the bond length is found to exhibit an oscillatory structure (the so-called
magic length phenomenon), with a qualitative change in oscillatory behavior as one moves from even N wire to odd N wire. The even N wires follow simple even-odd oscillations whereas odd N wires show a phase change at the half length of the wires. The stability of the wire structure, determined in terms of the wire formation energy, also contains even-odd oscillation as a function of wire length. However, the oscillations in formation energy reverse its phase after the wire length is increased beyond N=12. Our findings are seen to be qualitatively consistent with recent simulations for a similar class finite-length metal atom wires. [ABSTRACT FROM AUTHOR]- Published
- 2018
- Full Text
- View/download PDF
40. Amplitude and phase fluctuations of Van der Pol oscillator under external random forcing.
- Author
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Singh, Aman K., Yadava, R. D. S., Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
- Subjects
NONLINEAR oscillators ,LIMIT cycles ,WHITE noise ,SPECTRAL energy distribution ,POWER density ,POWER spectra ,MAGNITUDE (Mathematics) - Abstract
The paper presents an analytical study of noise in Van der Pol oscillator output subjected to an external force noise assumed to be characterized by delta function (white noise). The external fluctuations are assumed to be small in comparison to the average response of the noise free system. The autocorrelation function and power spectrum are calculated under the condition of weak nonlinearity. The latter ensures limit cycle oscillations. The total spectral power density is dominated by the contributions from the phase fluctuations. The amplitude fluctuations are at least two orders of magnitude smaller. The analysis is shown to be useful to interpretation microcantilever based biosensing data. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
41. Thermal analysis of friction riveting of dissimilar materials.
- Author
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Vignesh, N. J., Hynes, N. Rajesh Jesudoss, Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
- Subjects
THERMAL analysis ,FRICTION ,HEAT flux ,HEAT transfer - Abstract
Friction riveting is a new technique which finds its applications in a variety of domains, where there is a need to join dissimilar materials for the sake of achieving weight reduction of the components produced especially in the fields of aerospace and automobile. In this present work, a numerical simulation on the heat transfer analysis has been done to predict the variation of temperature on the surface of the components being joined. Owing to the applications, Aluminum rivet is chosen for friction riveting on Poly Methyl Metha Acrylate base material. Abaqus explicit version 6.14 has been used to simulate the results of the process. Heat flux at the joint interface has been computed and thermal distribution at the work material is predicted. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
42. Assessment of IRI-2016 profile parameters over Indian low latitude station.
- Author
-
Patel, Nilesh C., Karia, Sheetal P., Pathak, Kamlesh N., Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
- Subjects
IONOSPHERE ,LATITUDE ,ALTITUDES ,EVALUATION ,GEOMETRIC shapes - Abstract
The present study reports the assessment of the bottom-side profile thickness (B0), shape (B1) and F2-peak height (hmF2) parameters IRI-2016 model over the Indian region by using digisonde observations. The digisonde data from a low latitude station Ahmedabad, (located at the crest of the northern equatorial anomaly) during three months June-2012, July-2012 and December-2012 are considered for this study. Simultaneous comparison is made on the performance of three different options ‘Gul-1987’, ‘Bil-2000’ and the ‘ABT-2009’ for the bottom-side profile, three different options‘AMTB2013 (AMT)’, ‘SHU-2015 (SHU)’, and ‘BSE-1979 (BSE)’ for the hmF2 estimation in the latest available IRI-2016 to that obtained from digisonde measurements. Further, the diurnal characteristics of the B0 and B1 from digisonde measurements are also compared with those from the IRI-2016 model using the three different options. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
43. Variation of GPS-TEC in a low latitude Indian region during the year 2012 and 2013.
- Author
-
Patel, Nilesh C., Karia, Sheetal P., Pathak, Kamlesh N., Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
- Subjects
GLOBAL Positioning System ,IONOSPHERE ,EARTH stations ,SEASONAL temperature variations ,LATITUDE - Abstract
The paper is based on the ionospheric variations in terms of vertical total electron content (VTEC) for the period from January 2012 to December 2013 based on the analysis of dual frequency signals from the Global Positioning System (GPS) satellites recorded at ground stations Surat (21.16°N, 72.78°E Geog.), situated under the northern crest of the equatorial ionization anomaly region (EIA) and other three International GNSS Service (IGS) stations Bangalore (13.02°N, 77.57°E Geog.), Hyderabad (17.25°N, 78.30°E Geog.), and Lucknow (26.91°N, 80.95°E Geog.) in India. We describe the diurnal and seasonal characteristics. It was observed that GPS-TEC reaches its maximum value between 12:00 and 16:00 IST. Further, Seasonal variations of GPS-TEC is categorized into four seasons, i.e., March equinox (February, March, and April), June solstice (May, June, and July), September equinox (August, September, and October) and December solstice (November, December and January). The forenoon rate of production in Lucknow (beyond EIA crest) is faster than Bangalore, Hyderabad and Surat station. It is found that September equinox shows GPS-TEC slightly higher than the March equinox, followed by June solstice and the lowest GPS-TEC are in winter solstice at four stations. The equinoctial asymmetry clearly observed in the current study. Also GPS-TEC shows a semiannual variation. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
44. Study of grid independence of finite element method on MHD free convective casson fluid flow with slip effect.
- Author
-
Raju, R. Srinivasa, Ramesh, K., Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
- Subjects
FREE convection ,FINITE element method ,FLUID flow ,MAGNETOHYDRODYNAMICS ,MAGNETIC field effects ,HEAT radiation & absorption ,CONVECTIVE flow ,POROUS materials - Abstract
The purpose of this work is to study the grid independence of finite element method on MHD Casson fluid flow past a vertically inclined plate filled in a porous medium in presence of chemical reaction, heat absorption, an external magnetic field and slip effect has been investigated. For this study of grid independence, a mathematical model is developed and analyzed by using appropriate mathematical technique, called finite element method. Grid study discussed with the help of numerical values of velocity, temperature and concentration profiles in tabular form. avourable comparisons with previously published work on various special cases of the problem are obtained. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
45. Spatial interference patterns in the dynamics of a 2D Bose-Einstein condensate.
- Author
-
Bera, Jayanta, Roy, Utpal, Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
- Subjects
BOSE-Einstein condensation ,CONDENSED matter physics ,FREQUENCIES of oscillating systems ,PHENOMENOLOGICAL theory (Physics) - Abstract
Bose-Einstein condensate has become a highly tunable physical system, which is proven to mimic a number of interesting physical phenomena in condensed matter physics. We study the dynamics of a two-dimensional Bose Einstein condensate (BEC) in the presence of a flat harmonic confinement and time-dependent sharp potential peak. Condensate density can be meticulously controlled with time by tuning the physically relevant parameters: frequency of the harmonic trap, width of the peaks, frequency of their oscillations, initial density etc. By engineering various trap profile, we solve the system, numerically, and explore the resulting spatial interference patters. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
46. Estimation of perceptible water vapor of atmosphere using artificial neural network, support vector machine and multiple linear regression algorithm and their comparative study.
- Author
-
Shastri, Niket, Pathak, Kamlesh, Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
- Subjects
METEOROLOGY ,SUPPORT vector machines ,WATER vapor ,ARTIFICIAL neural networks ,REGRESSION analysis ,STANDARD deviations ,ATMOSPHERE - Abstract
The water vapor content in atmosphere plays very important role in climate. In this paper the application of GPS signal in meteorology is discussed, which is useful technique that is used to estimate the perceptible water vapor of atmosphere. In this paper various algorithms like artificial neural network, support vector machine and multiple linear regression are use to predict perceptible water vapor. The comparative studies in terms of root mean square error and mean absolute errors are also carried out for all the algorithms. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
47. Dynamics of 28,30<italic>S i</italic>* compound nuclei formed at sub-barrier energies.
- Author
-
Kaur, Manpreet, Singh, Bir Bikram, Kaur, Sarbjeet, Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
- Subjects
POTENTIAL energy surfaces ,NUCLEAR structure - Abstract
The decay of
28 S i * and30 S i * compound nuclei (CN) formed at sub-barrier energies, in the reactions induced by stable projectile16 O and exotic projectile18 O , respectively, has been investigated within the quantum mechanical fragmentation theory based dynamical cluster-decay model (DCM). The collective potential energy surface shows that xα -type (x is an integer) clusters are minimized in the decay of28 S i * while in case of30 S i * in addition to xα -type clusters, np-xα (n, p are neutron and proton, respectively) type clusters are also minimized. These minimized fragments have more preformation probabilityP 0 , which is an important factor through which nuclear structure effects of decaying CN are probed, within DCM. The results show that light particles (LPs) are contributing mostly in the fusion cross-section, σ . In case offusion 30 S i *, the contribution of 1n is highest and more compared to4 He in case of28 S i *, which seems to play an important role in fusion enhancement. The DCM calculated σ for both the CN formed with samefusion E . = 7.0 MeV gives more value for σc.m offusion 30 S i *, in agreement with the experimental data. [ABSTRACT FROM AUTHOR]- Published
- 2018
- Full Text
- View/download PDF
48. Simulation of friction stir drilling process.
- Author
-
Vijayabaskar, P., Hynes, N. Rajesh Jesudoss, Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
- Subjects
FRICTION stir processing ,NUMERICAL analysis ,MATHEMATICAL forms ,SHEET metal - Abstract
The project is the study of the thermal drilling process. The process is a hole forming process in the sheet metals using the heat generated by means of friction. The main advantage of the process over the conventional drilling process is that the holes formed using this process does not need any backing arrangements such as weld nuts, rivet nuts etc. Because the extruded bush itself acts as a supporting structure for the fasteners. This eliminates the need for the access to the backside of the work material for fastening operations. The major factors contributing the thermal drilling operation are the spindle speed and the thrust force required for forming a hole. The process of finding out the suitable thrust force and the speed for drilling a particular material with particular thickness is a tedious process. The process can be simplified by forming a mathematical model by combining the empirical formulae from the literature. These formulae were derived in the literature from the experimental trials by following certain assumptions. In this paper a suitable mathematical model is formed by replicating the experiments and tried to be validated by the results from numerical analysis. The numerical analysis of the model is done using the ANSYS software. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
49. Electron impact scattering study of hypohalous acids HOX (X = F, Cl, Br, I).
- Author
-
Yadav, Hitesh, Bhutadia, Harshad, Prajapati, Dinesh, Desai, Hardik, Vinodkumar, Minaxi, Vinodkumar, P. C., Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
- Subjects
ELECTRON scattering ,ELECTRON impact ionization ,ELECTRONIC excitation ,ACIDS ,BROMINE - Abstract
In this article we aim to report total cross sections (TCS)
Q , total elastic cross sections (T Q ), total inelastic cross sections (el Q ) i.e. (total ionizations cross sections (inel Q )+total electronic excitation cross sections (ion Q )) from threshold of the target to 5000 eV energy range. We have used a well-defined theoretical methodology Spherical Complex Optical Potential (SCOP) to computeexc Q ,T Q andel Q and Complex Scattering Potential - ionization contribution (inel CSP - ic ) method to report the (Q ). The cross-sectional data reported here for the Hypohalous Acids is for the first time and the present data can become a guideline for the experimentalist to study these targets. [ABSTRACT FROM AUTHOR]ion - Published
- 2018
- Full Text
- View/download PDF
50. Modelling of nanoscale quantum tunnelling structures using algebraic topology method.
- Author
-
Sankaran, Krishnaswamy, B., Sairam, Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer
- Subjects
ALGEBRAIC topology ,TUNNELS ,ELECTRON tunneling ,ANALYTICAL solutions ,TUNNEL design & construction - Abstract
We have modelled nanoscale quantum tunnelling structures using Algebraic Topology Method (ATM). The accuracy of ATM is compared to the analytical solution derived based on the wave nature of tunnelling electrons. ATM provides a versatile, fast, and simple model to simulate complex structures. We are currently expanding the method for modelling electrodynamic systems. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
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