OALib Journal
  OALib Journal is an all-in-one open access journal (ISSN Print: 2333-9705, ISSN Online: 2333-9721). It accepts a manuscript for the peer-review processing, typesetting, publication and then allocated to one of the 322 subject areas. The article processing charge for publishing in OALib journal is Only $99. For more details, please contact service@oalib.com. Submit now
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Feb 23, 2021Open    AccessArticle

First Correct Experimental Discovery of the “Weak” Gyrotropy-Phenomenon of “Non-Gyrotropic” Crystals of 3 m, 4 mm, 6 mm Symmetry Classes, Using the LiNbO3 Crystal as an Example

Alexander Kh. Zilbershtein
The purpose of the work was the correct experimental discovery of the effect of “weak” gyrotropy of the “non-gyrotropic” transparent crystals. The original experiment was based on the study of the light transmission (T) of the system: Polarizer—wedge-shaped Crystal’s sample—Analyzer (orthogonal to Polarizer). It was shown that: if the optical axis of the crystal is parallel to the rib of the wedge and to the polarization of the linear-polarized incident light, then the transmission T of the syst...
Open Access Library J. Vol.8, 2021

Jul 14, 2020Open    AccessArticle

Mechanical, Dielectric and Shielding Performance of Rice Husk/Polycaprolactone Composites Enhanced via Rice Husk Particles Inclusion

Abubakar Yakubu, Zulkifly Abbas, Sirajo Abdullahi
Developing new absorbing and shielding materials with a large band of frequency and high performance to allow the coexistence of the electronic components without the damaging electromagnetic interference (EMI) is needed. For this reason, this work is focused on polycaprolactone (PCL) and rice husk particles (RHP) prepared at filler percentage of 0 to 60 wt% leading to the formation of PCL/RHP composites. The RHP was prepared by washing with water, acetone, sun-dried and grinded in a milling mac...
Open Access Library J. Vol.7, 2020

Jun 12, 2020Open    AccessArticle

Numerical Modeling of the Radiative Transfer by the Fractional Step Method

Abdelhamid Belghit, Ibtissam Ouzzine
The main subject of this study is to adapt the fractional step method to the resolution of the radiative heat equation. This interest is justified by the intervention of the flow radiation in the modeling of several physical phenomena. Since this differential equation is actually difficult to solve, a new method has to be used to solve the equations that govern the heat transfer in the porous medium. The results have been limited to the less fine parametric study and have brought us to the concl...
Open Access Library J. Vol.7, 2020

May 26, 2020Open    AccessArticle

Optimization of Process Parameters in Electro-Magnetic Welding of D9 Tube to SS316 L (N) Plug

Satendra Kumar, G. K. Dey, Archana Sharma
In electro-magnetic welding (EMW) process, optimization of process parameters is very important aspect. Optimization process leads to generation of mechanically and metallurgically sound interface weld without overstressing tool coil and electromagnetic welding equipment. This work investigates the effect of four important process parameters (Magnetic field in coil ID, Frequency of current pulse, Taper angle of SS316 L (N) plug and Stand-off distance between D9 tube and SS316 L (N) plug) on weld...
Open Access Library J. Vol.7, 2020

May 26, 2020Open    AccessArticle

New Principle of Busbar Protection Based on Active Power and Extreme Learning Machine

Syed Hassan Lal Gilani, Xingxing Dong, Haiyan Xu
In order to improve the reliability of busbar protection, a new fast busbar protection algorithm based on active power and extreme learning machine is proposed. By performing S-transformation on the fault voltage and current traveling wave, the active power amplitude within 0.1 ms after the fault is obtained. Simulate different fault types in the busbar area and build a bus fault feature vector sample set. The intelligent model of fault learning of extreme learning machine is established, and th...
Open Access Library J. Vol.7, 2020

Apr 29, 2020Open    AccessArticle

A Novel Iterative Method Based on Bernstein-Adomian Polynomials to Solve Non-Linear Differential Equations

Afaf Nasser Yousif, Ahmed Farooq Qasim
In this paper, a new iterative formula for solving ordinary and partial nonlinear differential equations is derived based on the combination between Bernstein’s polynomial and the Adomian decomposition formula. The solution of the differential equations has been transformed into iterative formulas that find the solution directly without the need to convert it into a non-linear system of equations and solving it by other numerical methods that require considerable time and effort. The obtained re...
Open Access Library J. Vol.7, 2020

Nov 07, 2019Open    AccessArticle

A New Approach to Telescope Fourier Optics

Roy Danchick
In this paper we take a new approach to solving the Ray-leigh-Sommerfeld-Smythe equation for a telescope’s optical impulse re-sponse to a monochromatic point source spherical wave radiating outward from the origin in the object plane. Two cases are covered: 1) the point source at the origin in the telescope’s near-field object plane; 2) the point source at the origin in the far-field object plane as is the case wi
Open Access Library J. Vol.6, 2019

Aug 27, 2019Open    AccessArticle

Neutron Pairing Energy of Finite Nuclei

Masinde Wekesa Fred
Neutron pairing energies of some of the finite nuclei have been calculated to understand how the neutron pairing changes as the neutron and proton numbers change from odd to even values in isotopes. How its value changes for even (N) - even (Z), even (N) - odd (Z), odd (N) - even (Z) and odd (N) - odd (Z) nuclei has been brought out. The values of pairing energies have been calculated for ligh
Open Access Library J. Vol.6, 2019

Aug 27, 2019Open    AccessArticle

Role of Holes in Determining Resistivity and Hall Effect in Crystals of YB2Cu3O7-δ and Bi2Sr2CaCu2O8-δ

Fred Wekesa Masinde
Electrical transport properties of superconducting materials are a widely studied area in superconductivity. In this study, the role of holes in determination of resistivity, Hall coefficient and Hall angle has been explored using a two-band model due to co-existence of holes and electrons in high-Tc YB2Cu3O7-δ and Bi2Sr2CaCu2O8-δ. The results obtained from this study show that hole resistivity decreases with increase in the ratio
Open Access Library J. Vol.6, 2019

Aug 26, 2019Open    AccessArticle

Determining the Radius of the Magnetic Vortex Core of YBCO123 and Bi2212

A. Mukubwa, Fred Masinde
A plasma has been defined as a quasi-neutral gas of charged particles showing collective behaviour. Plasmas can support waves depending on the local condi-tions, the presence of external electric and magnetic fields. A characteristic property of plasmas is their ability to transfer momentum and energy via col-lective motion. An example in this case, is the Langmuir waves where plasma electrons oscillate against a st
Open Access Library J. Vol.6, 2019


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