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Your search keyword '"Mohammed, Laheeb A."' showing total 10 results
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10 results on '"Mohammed, Laheeb A."'

1. Determination of continuous electrical conductivity parameters and their influence on Partial Replacement Of Antimony With Sn In The Ge20Te72In8 Chalcogenide Glass.

Author

Mohammed, Laheeb A., Neamah, Zainab J., Watan, Anaam W., Jasim, Kareem Ali, and Shaban, Auday H.

Subjects
*ELECTRICAL conductivity measurement, *ENERGY levels (Quantum mechanics), *ELECTRIC conductivity, *TERNARY alloys, *LIQUID alloys
Abstract

In the present work, the changes in electrical conductivity upon partial replacement of antimony by Tin (Sn) in the ternary alloy prepared by the molten cooling method were synthesized and studied. The electrical measurements were performed on Ge20Te72In8- xSnx Chalcogenide glass alloy with x = 0, 2, 4, and 6. The dark conductivity (σd) increases with the increase in temperature in all the samples under the experiment. Observations of data were made at low (300 - 335K), medium (335 - 365K), and high temperatures (365 - 400K) across three distinct regions regarding electrical conductivity. For each of the three conduction regions, the factor that precedes the exponent and the effective energies were calculated using electrical conductivity measurements as a function of temperature. It was found that all of them were affected by an increase in the value of Sn. A numerical analysis of the conductivity equation was also carried out for the densities of the energy for the extended states, localized states, and at the Fermi level. It has been observed that all of them change with the change in the value of Sn. [ABSTRACT FROM AUTHOR]

Published
2024
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5. Full Automation in Driverless Trains: A Microcontroller-Based Prototype

Author

Mohammed Ahmed Akaak, Thabit Sultan Mohammed, Mohammed Laheeb Suroor, and Wiisam Fahmii All--Azzo

Subjects
Microcontroller, Software, business.industry, Computer science, Automatic train operation, Control system, Train, PIC microcontroller, business, Telecommunications, Automation, Computer hardware, PATH (variable)
Abstract

Driverless trains are equipped with a control system, which is programmed to make them following a specific path. Stations on such a path, timings of the train and distances between stations are all predefined. Messages and warnings are automatically generated and announced to the passengers. This paper presents the development process of a prototype for a driverless train implemented using a PIC microcontroller. Simulation for the system's circuits is done with the aid of Proteus software. The hardware circuits, which are built on printed circuit boards (PCB) are interfaced with actuators and sensors for automation purposes. The hardware is assembled in a toy-like prototype train. The C programming language is used for programming the microcontroller.

Published
2014
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8. The influence of partial substation of antimony & lanthanum oxides on electrical and structural properties for the superconductor compound Bi2-xSbxBa2Ca2-yLayCu3O10+δ.

Author

Mohammed, Laheeb A., Hussein, Haider S., Haider, Haider M. J., Jasim, Kareem A., Shaban, Auday H., Askar, Samir G. M., and Ali, Fouad W.

Subjects
*ZINTL compounds, *LANTHANUM oxide, *ALKALINE earth metals, *BISMUTH, *SUPERCONDUCTORS, *ANTIMONY, *CRITICAL temperature, *LATTICE constants
Abstract

In this research the Bi2-xSbxBa2Ca2-yLayCu3O10+δ compound was prepared and studied the influence of partial substation of Sb2O3 and La2O3 on the electrical and structural properties Samples synthesis by solid state reaction method. The examination of XRD diffraction shown that all samples have bulk polycrystalline with orthorhombic structure. The results shows that the increasing of the c-axis lattice constant for the samples substation with Sb2O3 and La2O3 as compared with those have no content, It was found that changing in lattice parameters (a,b), ratio c/a, mass density and volume fraction Vphases with increases of (Sb2O3,La2O3) concentration. All samples have highest phase 2223 major relative to the other phases. The electrical properties tested by using four probes technique to calculation critical temperatures, it was found the sample Bi1.6Sb0.4Ba2Ca1.8La0.2Cu3O10+δ has a highest critical temperatures Tc=122.5K. [ABSTRACT FROM AUTHOR]

Published
2019
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9. The influence of partial substation of antimony & lanthanum oxides on electrical and structural properties for the superconductor compound Bi2-xSbxBa2Ca2-yLayCu3O10+δ.

Author

Mohammed, Laheeb A., Hussein, Haider S., Haider, Haider M. J., Jasim, Kareem A., Shaban, Auday H., Askar, Samir G. M., and Ali, Fouad W.

Subjects
ZINTL compounds, LANTHANUM oxide, ALKALINE earth metals, BISMUTH, SUPERCONDUCTORS, ANTIMONY, CRITICAL temperature, LATTICE constants
Abstract

In this research the Bi2-xSbxBa2Ca2-yLayCu3O10+δ compound was prepared and studied the influence of partial substation of Sb2O3 and La2O3 on the electrical and structural properties Samples synthesis by solid state reaction method. The examination of XRD diffraction shown that all samples have bulk polycrystalline with orthorhombic structure. The results shows that the increasing of the c-axis lattice constant for the samples substation with Sb2O3 and La2O3 as compared with those have no content, It was found that changing in lattice parameters (a,b), ratio c/a, mass density and volume fraction Vphases with increases of (Sb2O3,La2O3) concentration. All samples have highest phase 2223 major relative to the other phases. The electrical properties tested by using four probes technique to calculation critical temperatures, it was found the sample Bi1.6Sb0.4Ba2Ca1.8La0.2Cu3O10+δ has a highest critical temperatures Tc=122.5K. [ABSTRACT FROM AUTHOR]

Published
2019
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