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1.
Sarwar Sohail Qayyum Zia Ul García-Castro Raúl Safyan Muhammad Munir Rana Faisal 《Multimedia Tools and Applications》2019,78(24):34745-34771
Multimedia Tools and Applications - Enhancing the degree of learner productivity, one of the major challenges in E-Learning systems, may be catered through effective personalization, adaptivity and... 相似文献
2.
Khan Athar Ali Ul Hassan Muneeb Rehmani Mubashir Husain Yang Xiaodong 《Wireless Networks》2020,26(1):145-164
Wireless Networks - Communication systems play an important role in smart grid (SG). Advanced Metering Infrastructure (AMI) is hybrid architecture in smart grid comprising of smart meters and... 相似文献
3.
The finite difference time domain modeling technique is used to model the near end and far end crosstalk on coupled microstrip structures used in multichip modules. The lines are terminated in lumped resistors which closely, but not exactly, match the lines. One line is excited by a Gaussian voltage pulse produced by a Thévenin equivalent voltage source. It is shown that adding dielectric strips in the substrate below the conducting lines will reduce the peak crosstalk by as much as 80%. Eight different configurations are modeled consisting of dielectric strips with different dielectric constant combinations. All configurations are modeled with and without a metal case in order to make sure that the crosstalk reduction persists when the structure is enclosed in a metallic enclosure (this would be the case for multichip modules). The results show that using dielectric strips with the smallest possible dielectric constant reduces crosstalk the most. © 1996 John Wiley & Sons, Inc. 相似文献
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Shakir Ullah A. Qayyum 《Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms》2009,267(18):3059-3062
Here we describe a recently developed direct Monte Carlo program to study kinetic electron emission from SiO2 target. The program includes excitation of the target electrons (by projectile ions, recoiling target atoms and fast primary electrons), subsequent transport and escape of these electrons from the target surface. The program can be used to calculate the electron yields, distribution of electron excitation points in the target and other physical parameters of the emitted electrons. In order to demonstrate the capabilities of this program, we report a study on the kinetic electron emission from SiO2 induced by fast (1-10 keV) rare gas ions. The calculated kinetic electron yield for various ion energies and masses is in good agreement with the predictions of most frequently applied theoretical model. In addition, the effects of projectile energy, mass and impact angle on the depth distribution of electron excitation points and average escape depth of the outgoing electrons were investigated. It is important to mention that the existing experimental techniques are not capable to measure these parameters. 相似文献
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Thin films of ZnS were deposited on soda lime glass substrates by a modified close-space sublimation technique. The change
in optical and structural properties of the films deposited at various substrate temperatures (150–450°C) was investigated.
X-ray diffraction spectra showed that films were polycrystalline in nature having cubic structure oriented only along (111)
plan. The crystallinity of films increased with the substrate temperature up to 250°C. However, crystallinity decreased with
further increase of substrate temperature and films became amorphous at 450°C. The atomic force microscopy data revealed that
the films become more uniform and dense with the increase of substrate temperature. Optical properties of the films were determined
from the transmittance data using Swanepoel model. It was observed that the energy band gap is increased from 3.52 to 3.65
eV and refractive index of the films are decreased with the increase of substrate temperature. Moreover, considerable improvement
in blue response of the films was noticed with increasing substrate temperature. 相似文献
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Qayoom Mubashir Shah Khurshed Ahmad Pandit Altaf Hussain Firdous Arfat Dar Ghulam Nabi 《Journal of Electroceramics》2020,45(1):7-14
Journal of Electroceramics - Hematite (α-Fe2O3) nanoparticles were synthesized by modified solution combustion method using a mixture of hexamethylenetetramine (HMTA) and glycine fuels at fuel... 相似文献