Zobrazeno 1 - 10
of 250
pro vyhledávání: '"Emad M Ahmed"'
Publikováno v:
Materials Research Express, Vol 9, Iss 1, p 016301 (2022)
The paper addresses a novel approach concerning the appearance of negative series resistance (R _s ) at high frequencies for both temperatures and voltages. Most of the previous studies have focused on the relationship between voltage and current (I
Externí odkaz:
https://doaj.org/article/83cdb0d9651e4c90a0b39ed4aafad74f
Autor:
Emad M Ahmed, Ali A Alkathiri
Publikováno v:
Materials Research Express, Vol 9, Iss 5, p 055305 (2022)
Cerium oxide nanoparticles (CeO _2 NPs) of different ratios ( x = 5, 10, 15, and 20 in wt %) are successfully incorporated into chitosan (CS) to synthesize CeO _2 NPs/CS nanocomposites by solution cast method. FTIR and XRD analysis confirmed the effe
Externí odkaz:
https://doaj.org/article/4557a8547fe146cbabcc8462b44c6620
Publikováno v:
Materials Research Express, Vol 8, Iss 7, p 075003 (2021)
The paper presents a new approach based on the appearance of negative capacitance (NC) at high and low frequencies; previously, researchers agreed that NC only occurred at high or low frequencies. For the first time, we synthesized Au/polypyrrole/MWC
Externí odkaz:
https://doaj.org/article/6413da2af01941a595eac4d3de9917f5
Autor:
Hafiz T Ali, Abdulaziz H Alghtani, Bassem F Felemban, Kh Abd El-Aziz, D Saber, Emad M Ahmed, M Megahed, Mohamad Fotouhi
Publikováno v:
Materials Research Express, Vol 8, Iss 9, p 095504 (2021)
There is a rising demand for advanced new materials in food packaging to meet the growing economic and sustainability requirements. Natural fibers have excellent mechanical and thermal isolation properties and lower production costs than synthetic fi
Externí odkaz:
https://doaj.org/article/f4061c2891cf46a1ba6e3d4f796b48c0
Autor:
Emad M Ahmed, D Saber, Kh Abd ElAziz, Abdulaziz H Alghtani, Bassem F Felemban, Hafiz T Ali, M Megahed
Publikováno v:
Materials Research Express, Vol 8, Iss 2, p 025017 (2021)
In the present work, Cerium (IV)-Zirconium (IV) oxide nanoparticles (CeO _4 ZrNPs) was successfully dispersed into Chitosan/15Gelatin nanocomposites with different quantities. The obtained chitosan-based nanocomposites represented remarkable improvem
Externí odkaz:
https://doaj.org/article/56d09cfeaea74e48899b1a1e4494f39c
Publikováno v:
Results in Engineering, Vol 23, Iss , Pp 102811- (2024)
The triple active bridge (TAB) converter has been proposed to improve power density and availability in more electric aircraft applications. However, the conventional proportional-integral (PI) controller used for TAB voltage control often exhibits s
Externí odkaz:
https://doaj.org/article/d6d05e87be8d489982004669582f7548
Autor:
Altaf Hussain Rajpar, Mohamed Bashir Ali Bashir, Ethar Yahya Salih, Emad M. Ahmed, A.M. Soliman
Publikováno v:
Results in Engineering, Vol 24, Iss , Pp 102907- (2024)
Exploring substantial solar irradiation and recuperating excess heat generated during photovoltaic energy conversion is a critical issue. The efficiency of photovoltaic systems (PV) is significantly depend on the increased operating temperatures enco
Externí odkaz:
https://doaj.org/article/0769bd98e34747188481b75cbd46ca02
Autor:
Ahmed Hamed Ahmed Adam, Jiawei Chen, Minghan Xu, Salah Kamel, Ghazally I. Y. Mustafa, Zaki A. Zaki, Emad M. Ahmed
Publikováno v:
IEEE Access, Vol 12, Pp 140310-140328 (2024)
DC microgrids, which use various energy sources, require an energy storage system (ESS) to stabilize the grid systems. Multiport active bridge (MAB) bidirectional DC-DC converters offer several advantages over other converters, including higher power
Externí odkaz:
https://doaj.org/article/623f1161fc074f27bb9cc27b5c30de3e
Publikováno v:
IEEE Access, Vol 12, Pp 109832-109846 (2024)
Single-stage differential mode inverters (DMI) have been extensively utilized in three-phase grid-connected systems due to several advantages, such as few semiconductor devices resulting from their simple and modular configuration. Nevertheless, the
Externí odkaz:
https://doaj.org/article/cbc5759e575c4094a88eea20947e890d
Autor:
Mohamed Abdelkader, Emad M. Ahmed, Emad A. Mohamed, Mokhtar Aly, Ahmed Alshahir, Yousef S. Alrahili, Salah Kamel, Francisco Jurado, Loai Nasrat
Publikováno v:
World Electric Vehicle Journal, Vol 15, Iss 8, p 346 (2024)
Microgrid systems face challenges in preserving frequency stability due to the fluctuating nature of renewable energy sources (RESs), underscoring the importance of advanced frequency stabilization strategies. To ensure power system stability in situ
Externí odkaz:
https://doaj.org/article/93b8d1d0f74545cbb5992b98be381085