259 research outputs found
The study of multifragmentation around transition energy in intermediate energy heavy-ion collisions
Fragmentation of light charged particles is studied for various systems at
different incident energies between 50 and 1000 MeV/nucleon. We analyze
fragment production at incident energies above, below and at transition
energies using the isospin dependent quantum molecular dynamics(IQMD) model.
The trends observed for the fragment production and rapidity distributions
depend upon the incident energy, size of the fragments, composite mass of the
reacting system as well as on the impact parameter of the reaction. The free
nucleons and light charged particles show continous homogeneous changes
irrespective of the transition energies indicating that there is no relation
between the transition energy and production of the free as well as light
charged particles
Influence of density dependent symmetry energy on Elliptical flow
The effect of density dependent symmetry energy on elliptical flow is studied
using isospin-dependent quantum molecular dynamics model(IQMD). We have used
the reduced isospin- dependent cross-section with hard(H) equation of state to
study the sensitivity of elliptical flow towards symmetry energy in the energy
range of 50 - 1000 MeV/nucleon. The elliptical flow becomes zero at a
particular energy termed as transition energy. A systematic effort has been
made to pin down the transition energy for the density dependent symmetry
energy
Investigation of current-voltage characteristics of Ni/GaN Schottky barrier diodes for potential hemt applications
In the present work, the I-V characteristics of Ni/GaN Schottky diodes have been studied. The Schottky diodes, having different sizes using Ni/Au and ohmic contacts using Ti/Al/Ni/Au were made on n-GaN. The GaN was epitaxially grown on c-plane
sapphire by metal organic chemical vapor deposition (MOCVD) technique and had a thickness of about 3.7 μm. The calculated ideality factor and barrier height from current-voltage (I-V) characteristics (at 300 K) for two GaN Schottky diodes were
close to ~1.3 and ~ 0.8 eV respectively. A high reverse leakage current in the order of 10 – 4A/cm2 (at – 1 V) was observed in both diodes. A careful analysis of forward bias I-V characteristics showed very high series resistance and calculation for ideality factor indicated presence of other current transport mechanism apart from thermionic
model at room temperature.
When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/2202
Effect of electrode location and thickness ratio of flange and web on I cross section piezoelectric cantilever beam for its actuation capability
Present work deals with the numerical investigation of a cantilever beam having I cross section made up of piezoelectric material for its actuation capability. The beam is modeled under the assumption of Euler’s Bernoulli equation. Eight cases are considered for different electrode locations. The beam was subjected to voltage loads at different locations. It was noticed that tip deflection increases with increasing applied voltage across the electrodes. Maximum tip deflection was achieved with the increase in voltage with particular electrode arrangement. In this report we have also demonstrated that for downward tip deflection, there are two values of thickness ratio of flange and web for a given tip deflection at a given applied voltage
A Trio-Method for Retinal Vessel Segmentation using Image Processing
Inner Retinal neurons are a most essential part of the retina and they are
supplied with blood via retinal vessels. This paper primarily focuses on the
segmentation of retinal vessels using a triple preprocessing approach. DRIVE
database was taken into consideration and preprocessed by Gabor Filtering,
Gaussian Blur, and Edge Detection by Sobel and Pruning. Segmentation was driven
out by 2 proposed U-Net architectures. Both the architectures were compared in
terms of all the standard performance metrics. Preprocessing generated varied
interesting results which impacted the results shown by the UNet architectures
for segmentation. This real-time deployment can help in the efficient
pre-processing of images with better segmentation and detection.Comment: Accepted at 26th UK Conference on Medical Image Understanding and
Analysis (MIUA-2022) (Abstract short paper
Numerical analysis of temperature distribution in sliding contacts of pin on disc model
Pin on disc is a tribosystem confirming to ASTM G99, is employed in this work. It consists of deformable cylindrical disc and rigid pin with friction. Coating of Inconel 712 is added on stainless steel disc and pin is made of SiC3. The FEM software ANSYS R19.1 is employed for simulation of temperature distribution produced due to friction between pin on disc. Stress distribution is calculated from result produced between pin and disc interface due to applied contact load on pin. The governing equation is mentioned in introduction section. Result showing as contact load on pin increases maximum principle stress is increases. Temperature rises in direct proportion with sliding distance and time. Simulation result validates and confirmed with experimental results
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