Zobrazeno 1 - 10
of 687
pro vyhledávání: '"Ahmed Marwan"'
Publikováno v:
Arab Universities Journal of Agricultural Sciences, Vol 31, Iss 1, Pp 81-87 (2023)
This study aimed to evaluate the influence of choline chloride supplementation on the growth performance of feedlot calves. Thirty-two crossbred calves with a mean initial body weight of 305.71±4.09 Kg were divided into three groups of 10, 11 and 11
Externí odkaz:
https://doaj.org/article/9e02ef8762cd49df9f83cfde707c2e58
Publikováno v:
EPJ Web of Conferences, Vol 307, p 04028 (2024)
We present the first thin-disk laser operation of alexandrite with an average power over 15 W in continuous-wave multimode operation at a wavelength of 750 nm. Additionally, single- mode operation with up to 2.6 W was achieved.
Externí odkaz:
https://doaj.org/article/1d943f487add42daa8746fe559f61edf
Publikováno v:
EPJ Web of Conferences, Vol 307, p 02036 (2024)
We present in this contribution a single large-mode area inhibited-coupling hollow-core fiber for guiding laser beam at a wavelength of 1030 nm and its second harmonic at 515 nm with confinement losses below 30 dB/km.
Externí odkaz:
https://doaj.org/article/53f64f31b3b04337a8ed591d658dae03
Autor:
Leyzner Maxim, Gierss Peter, Ćutuk Ana, Currle Kai, Rühle Rebecca, Jetter Michael, Michler Peter, Graf Thomas, Ahmed Marwan Abdou
Publikováno v:
EPJ Web of Conferences, Vol 307, p 02035 (2024)
We propose a grating waveguide structure with embedded quantum wells that shows potential for improving the cooling scheme for red-emitting VECSELs. The reflectivity map, the internal field distribution and the transmission spectra of our recently fa
Externí odkaz:
https://doaj.org/article/aba7049608704239a2e5666cee698f80
Autor:
Boubekraoui Ayoub, Tomilov Sergei, Redkin Mykyta, Bashir Danish, Mourkioti Georgia, Mackenzie Jacob, Saraceno Clara J., Graf Thomas, Ahmed Marwan Abdou
Publikováno v:
EPJ Web of Conferences, Vol 307, p 02024 (2024)
We present resonant waveguide-grating (RWG) tailored for lasers operating at the 2-µm wavelength range. Utilizing the RWG as a cavity mirror, generation of tunable narrow-bandwidth and linearly-polarized radiation from a Ho:YAG thin-disk laser was d
Externí odkaz:
https://doaj.org/article/9a8221ab78574948983b9945c980a561
Autor:
Ye Hanyu, Pontagnier Lilia, Bendahmane Abdelkrim, Guandalini Annalisa, Kemnitzer Matthias, Gorjan Martin, Au Jürg Aus der, Loescher Andre, Bienert Florian, Ahmed Marwan Abdou, Santarelli Giorgio, Cormier Eric
Publikováno v:
EPJ Web of Conferences, Vol 307, p 02029 (2024)
We report on a laser producing bursts of GHz picosecond pulses with pulse repetition rate between 1 and 7.5 GHz, tens to thousands pulses per burst, 1 kW average power and inJ energy per burst. © 2024 The Author(s).
Externí odkaz:
https://doaj.org/article/a515aa1f983941e181e7fbfefb8ca0ea
Autor:
Ahmed Abdallah Salman, Mohamed Abdalla Salman, Mostafa Said, Mohammad El Sherbiny, Hesham Elkassar, Mohamed Badr Hassan, Ahmed Marwan, Mohamed Abdelkader Morad, Omar Ashoush, Safa Labib, Mohamed H. Aon, Abeer Awad, Mohamed Sayed, Ahmed E. Taha, Ahmed Moustafa, Hossam El-Din Shaaban, Amir Khater, Ahmed Elewa, Adel M. Khalaf, Ahmed A. Mostafa, Mohamed Matter, Ahmed Youssef
Publikováno v:
Frontiers in Medicine, Vol 9 (2022)
PurposeObesity is associated with fat accumulation in ectopic sites such as the pancreas, the so-called pancreatic steatosis (PS). Bariatric surgery has been shown to be associated with reducing pancreatic fat. This study investigated the effect of l
Externí odkaz:
https://doaj.org/article/41020d6446664b1998e81ad95d6ba583
Autor:
Alkhatatba Mohammad, Anaqreh Yazan, Essa Suhaib Bani, Alma’aiteh Ala’a, Ziad Audat Hamzeh, Obeidat Naser, Ahmed Marwan
Publikováno v:
SICOT-J, Vol 9, p 31 (2023)
Bilateral spontaneous quadriceps tendon rupture is a rare condition characterized by the simultaneous tear of the fibrous tissue connecting the quadriceps muscle to the patella bone. Prompt diagnosis is crucial for appropriate treatment and optimal o
Externí odkaz:
https://doaj.org/article/55ddad537320437d8c8d504a3e210c08
Publikováno v:
Underground Space, Vol 3, Iss 1, Pp 45-60 (2018)
Design methods for segmental tunnel linings used in mechanized tunnel constructions typically employ numerical bedded beam models and/or classical analytical solutions for the determination of structural forces (i.e. moments and shear and axial force
Externí odkaz:
https://doaj.org/article/999968c35014436590496677bf0e66e7
Autor:
Zeyen, Manuel, Affolter, Lukas, Ahmed, Marwan Abdou, Graf, Thomas, Kara, Oguzhan, Kirch, Klaus, Marszalek, Miroslaw, Nez, François, Ouf, Ahmed, Pohl, Randolf, Rajamohanan, Siddharth, Yzombard, Pauline, Schuhmann, Karsten, Antognini, Aldo
We report on an Yb:YAG thin-disk multipass amplifier delivering 50 ns long pulses at a central wavelength of 1030 nm with an energy of 330 mJ at a repetition rate of 100 Hz. The beam quality factor at the maximum energy was measured to be $\text{M}^2
Externí odkaz:
http://arxiv.org/abs/2309.13726
