Zobrazeno 1 - 10
of 178
pro vyhledávání: '"A M, Weng"'
Publikováno v:
Matter and Radiation at Extremes, Vol 9, Iss 3, Pp 037201-037201-8 (2024)
The generation of ultrashort high-power light sources in the mid-infrared (mid-IR) to terahertz (THz) range is of interest for applications in a number of fields, from fundamental research to biology and medicine. Besides conventional laser technolog
Externí odkaz:
https://doaj.org/article/315c2a6c07be4048afdf4e596e6203f2
Publikováno v:
Physical Review Accelerators and Beams, Vol 27, Iss 8, p 081301 (2024)
A terahertz radiation enhancing scheme, in which a linearly polarized weakly relativistic laser pulse irradiates a target consisting of two parallel thin-solid layers with a certain gap, is proposed and studied by using two-dimensional particle-in-ce
Externí odkaz:
https://doaj.org/article/6c46958fb66741bc84ea4eebdccf86b7
Publikováno v:
High Power Laser Science and Engineering, Vol 12 (2024)
Polarized electron beam production via laser wakefield acceleration in pre-polarized plasma is investigated by particle-in-cell simulations. The evolution of the electron beam polarization is studied based on the Thomas–Bargmann–Michel–Telegdi
Externí odkaz:
https://doaj.org/article/6761667b0b8146dd898d195358c3fcbe
Autor:
X. F. Li, S. M. Weng, P. Gibbon, H. H. Ma, S. H. Yew, Z. Liu, Y. Zhao, M. Chen, Z. M. Sheng, J. Zhang
Publikováno v:
Matter and Radiation at Extremes, Vol 8, Iss 6, Pp 065601-065601-11 (2023)
Broadband lasers have been proposed as future drivers of inertial confined fusion (ICF) to enhance the laser–target coupling efficiency via the mitigation of various parametric instabilities. The physical mechanisms involved have been explored rece
Externí odkaz:
https://doaj.org/article/0324ffaf73f744a18ace01b01f226da7
Autor:
Y. X. Wang, S. M. Weng, P. Li, Z. C. Shen, X. Y. Jiang, J. Huang, X. L. Zhu, H. H. Ma, X. B. Zhang, X. F. Li, Z. M. Sheng, J. Zhang
Publikováno v:
High Power Laser Science and Engineering, Vol 11 (2023)
As a typical plasma-based optical element that can sustain ultra-high light intensity, plasma density gratings driven by intense laser pulses have been extensively studied for wide applications. Here, we show that the plasma density grating driven by
Externí odkaz:
https://doaj.org/article/d11f1a223957479ab2bc32dad4de8397
Autor:
Andreas M. Weng, Julius F. Heidenreich, Corona Metz, Simon Veldhoen, Thorsten A. Bley, Tobias Wech
Publikováno v:
BMC Medical Imaging, Vol 21, Iss 1, Pp 1-11 (2021)
Abstract Background Functional lung MRI techniques are usually associated with time-consuming post-processing, where manual lung segmentation represents the most cumbersome part. The aim of this study was to investigate whether deep learning-based se
Externí odkaz:
https://doaj.org/article/2efb463fc97d4d4292416e1be37dbd78
Publikováno v:
BMC Cardiovascular Disorders, Vol 21, Iss 1, Pp 1-7 (2021)
Abstract Background The effect of smoking on coronary vasomotion has been investigated in the past with various imaging techniques in both short- and long-term smokers. Additionally, coronary vasomotion has been shown to be normalized in long-term sm
Externí odkaz:
https://doaj.org/article/3e89b039940c42b4af71183d7221dfb7
Autor:
Stefan Herz, Maria R Stefanescu, David Lohr, Patrick Vogel, Aleksander Kosmala, Maxim Terekhov, Andreas M Weng, Jan-Peter Grunz, Thorsten A Bley, Laura M Schreiber
Publikováno v:
PLoS ONE, Vol 17, Iss 6, p e0270689 (2022)
BackgroundTo investigate the effects of B1-shimming and radiofrequency (RF) parallel transmission (pTX) on the visualization and quantification of the degree of stenosis in a coronary artery phantom using 7 Tesla (7 T) magnetic resonance imaging (MRI
Externí odkaz:
https://doaj.org/article/5544386ee28c43e09f1aec32e1c7c01f
Publikováno v:
Matter and Radiation at Extremes, Vol 6, Iss 5, Pp 055902-055902-8 (2021)
Sunlight-like lasers that have a continuous broad frequency spectrum, random phase spectrum, and random polarization are formulated theoretically. With a sunlight-like laser beam consisting of a sequence of temporal speckles, the resonant three-wave
Externí odkaz:
https://doaj.org/article/20a8271b8df842edb10d489e46907f48
Autor:
Julius F. Heidenreich, Andreas M. Weng, Julian Donhauser, Andreas Greiser, Kelvin Chow, Peter Nordbeck, Thorsten A. Bley, Herbert Köstler
Publikováno v:
BMC Medical Imaging, Vol 19, Iss 1, Pp 1-9 (2019)
Abstract Background T1 mapping sequences such as MOLLI, ShMOLLI and SASHA make use of different technical approaches, bearing strengths and weaknesses. It is well known that obtained T1 relaxation times differ between the sequence techniques as well
Externí odkaz:
https://doaj.org/article/360beeab147d46f2b8f3a7315ee0edba