Zobrazeno 1 - 10
of 82
pro vyhledávání: '"Mahmoud A. Gaafar"'
Autor:
Mahmoud A. Gaafar, Markus Ludwig, Kai Wang, Thibault Wildi, Thibault Voumard, Milan Sinobad, Jan Lorenzen, Henry Francis, Jose Carreira, Shuangyou Zhang, Toby Bi, Pascal Del’Haye, Michael Geiselmann, Neetesh Singh, Franz X. Kärtner, Sonia M. Garcia-Blanco, Tobias Herr
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-8 (2024)
Abstract Femtosecond laser pulses enable the synthesis of light across the electromagnetic spectrum and provide access to ultrafast phenomena in physics, biology, and chemistry. Chip-integration of femtosecond technology could revolutionize applicati
Externí odkaz:
https://doaj.org/article/8e5376f54f2b490e80b367af596f13a9
Autor:
Markus Ludwig, Furkan Ayhan, Tobias M. Schmidt, Thibault Wildi, Thibault Voumard, Roman Blum, Zhichao Ye, Fuchuan Lei, François Wildi, Francesco Pepe, Mahmoud A. Gaafar, Ewelina Obrzud, Davide Grassani, Olivia Hefti, Sylvain Karlen, Steve Lecomte, François Moreau, Bruno Chazelas, Rico Sottile, Victor Torres-Company, Victor Brasch, Luis G. Villanueva, François Bouchy, Tobias Herr
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-11 (2024)
Abstract Astronomical precision spectroscopy underpins searches for life beyond Earth, direct observation of the expanding Universe and constraining the potential variability of physical constants on cosmological scales. Laser frequency combs can pro
Externí odkaz:
https://doaj.org/article/02c8fbd5a5d645ea8e4a621e88b14240
Autor:
Muhenad Bilal, Ranadheer Podishetti, Leonid Koval, Mahmoud A. Gaafar, Daniel Grossmann, Markus Bregulla
Publikováno v:
IEEE Access, Vol 12, Pp 124282-124297 (2024)
Ensuring cutting tools are in optimal condition is essential for achieving peak machining performance, given their direct impact on both workpiece quality and process efficiency. However, accurately assessing wear on end mills, especially those with
Externí odkaz:
https://doaj.org/article/244c9aa0911b420a9f857b3e9777f6b2
Autor:
Mohamed A. Mesbah, Khairy Sayed, Adel Ahmed, Mahmoud Aref, Mahmoud A. Gaafar, Mahmoud A. Mossa, Mishari Metab Almalki, Thamer A. H. Alghamdi
Publikováno v:
IEEE Access, Vol 12, Pp 47483-47493 (2024)
To enhance the stability and reliability of the system, the converters’ parallel operation can be cascaded to address the constraints posed by the substantial integration of renewable resources. Buck-boost DC-DC converters are often controlled via
Externí odkaz:
https://doaj.org/article/f912a2fd972148ba813b684b6ed78e59
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-15 (2023)
Abstract The inverter is considered the core of the PV power plant. The inverter’s failure leads to generation loss and decreases plant availability. So, it is required to investigate a clear Root Cause Analysis (RCA) to deduce the failure causes a
Externí odkaz:
https://doaj.org/article/723ed73a4dfa40fb857a96ca937043bb
Autor:
Mühenad Bilal, Ranadheer Podishetti, Leonid Koval, Mahmoud A. Gaafar, Daniel Grossmann, Markus Bregulla
Publikováno v:
Sensors, Vol 24, Iss 15, p 4777 (2024)
In this work, we investigate the impact of annotation quality and domain expertise on the performance of Convolutional Neural Networks (CNNs) for semantic segmentation of wear on titanium nitride (TiN) and titanium carbonitride (TiCN) coated end mill
Externí odkaz:
https://doaj.org/article/24d9d36b25564a068c5e2a9fd495ec23
Autor:
Nayira M. Elgammal, B. M. Younis, Mahmoud A. Gaafar, M. M. Elkholy, Mohamed Farhat O. Hameed, S. S. A. Obayya
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-12 (2023)
Abstract Reduction of the crosstalk (CT) between contiguous photonic components is still a big challenge in fabricating high packing density photonic integrated circuits (PICs). Few techniques to accomplish that goal have been offered in recent years
Externí odkaz:
https://doaj.org/article/c33427090fd44987a43570ea38b6d614
Autor:
Alaa A. Mahmoud, Ahmed A. Hafez, Ali M. Yousef, Mahmoud A. Gaafar, Mohamed Orabi, Alaa F.M. Ali
Publikováno v:
IET Power Electronics, Vol 16, Iss 1, Pp 11-25 (2023)
Abstract Recently, renewable distributed generation (DG) systems have emerged to improve the power system security and reliability while reducing the environmental incompatibility of fossil fuel power plants. DG could operate either as a standalone a
Externí odkaz:
https://doaj.org/article/f4ad7fc7b1f74976a0011bb8ebf6ceca
Publikováno v:
APL Photonics, Vol 6, Iss 6, Pp 066108-066108-9 (2021)
An optical pulse asymptotically reaching zero group velocity in tapered waveguides can ultimately stop at a certain position in the taper accompanied by a strong spatial compression. This phenomenon can also be observed in spatiotemporal systems wher
Externí odkaz:
https://doaj.org/article/5c8ba5d52678467daf8249ddd3db6e57
Publikováno v:
APL Photonics, Vol 5, Iss 8, Pp 080801-080801-9 (2020)
We discuss how dynamic light stopping and pulse time reversal can be implemented in dispersive waveguides via indirect photonic transitions induced by moving refractive index fronts. The previous concepts of light stopping/time reversal either requir
Externí odkaz:
https://doaj.org/article/cd55e20b6cca4475aaacba74d47753d9