Author: Prof.Mahmood Jawad Abu-Al-Shaeer

This study secures dark optical solitons to Lakshmanan-Porsezian-Daniel model which governs the dynamics of pulse propagation through long-haul optical fibers. The tanh method is utilized to retrieve solutions of this equation. There are three types of nonlinear fibers analyzed in this paper. They are with Kerr law, quadratic law and cubic-quintic law. DOI : https://www.sciencedirect.com/science/article/abs/pii/S0030402618301402

This work secures optical soliton solution to the nonlinear Schrodinger’s equation that appears with parabolic law nonlinearity and a couple of Hamiltonian type perturbation terms that are strong. Three integration schemes retrieve soliton solutions to the model. They are csch-function method, tanh-coth algorithm and modified simple equation technique. DOI : https://www.sciencedirect.com/science/article/abs/pii/S0030402618301232

Recent major advancements in drone charging station design are related to the differences in coil design between the material (copper or aluminum) and inner thickness (diameter design) to address power transfer optimization and increased efficiency. The designs are normally challenged with reduced weight on the drone’s side, which can lead to reduced payload or misalignment position issues between receiver and transmitter, limiting the performance of wireless charging. In this work, the coil combination was tested in vertical alignment from 2 cm to 50 cm, and in lateral misalignment positions that were stretched across 2, 5, 8, 10, and 15 cm ranges. Simulated and experimental results demonstrated improved transfer distances when the drone battery load was 100 Ω. With the proposed design, the vertical transfer power that was achieved was 21.12 W, 0.460 A, with 81.5% transfer efficiency, while the maximum lateral misalignment air gap that was achieved was 2 cm with 19.22 W and 74.15% efficiency. This study provides evidence that the developed circuit that is based on magnetic resonant coupling (MRC) is an effective technique towards improving power transfer efficiency across different remote and unmanned Internet of Things (IoT) applications, including drones for radiation monitoring and smart agriculture. DOI : https://www.mdpi.com/1996-1073/15/4/1298

This study secures singular and dark optical soliton solutions to the perturbed nonlinear Schrodinger’s equation that is studied with five different forms of nonlinearity. Two integration schemes are employed to retrieve these soliton solutions. They are csch method and the tanh method that successfully obtains the soliton solutions. DOI : https://www.sciencedirect.com/science/article/abs/pii/S0030402617318284

An intercomparison of daily minimum and maximum surface air temperatures between two years (2000 and 2015) over Baghdad city suggests that the rate of urbanization is fairly reflected in the rate of the change in the thermal climate about the city. Since 2003, Baghdad has experienced a very rapid urbanization process leading to a negative effects on its local climate, investigated in terms of daily data of minimum and maximum temperatures at 2 m. The average monthly minimum temperature has warmed by 3 °C, while the average monthly maximum temperature increased by 2 °C during 2000 and 2015. Finally, diurnal temperature range clearly increased during the second half of the year 2015. DOI : https://openurl.ebsco.com/EPDB%3Agcd%3A6%3A19541590/detailv2?sid=ebsco%3Aplink%3Ascholar&id=ebsco%3Agcd%3A148758081&crl=c

This study extracts bright and singular optical solitons to the governing nonlinear Schrödinger’s equation along with it’s perturbation terms having eleven different nonlinear forms. The sech function and csch function approaches recover these soliton solutions as well as other solutions. These existence criteria for such solitons are also presented. DOI : https://www.sciencedirect.com/science/article/abs/pii/S0030402620311657