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Diode-end-pumped continuous-wave and acousto-optics Q-switched Tm:LiLuF(4) slab lasers were demonstrated. The a-cut Tm:LiLuF(4) slab with doping concentrations of 2 at.% was pumped by fast-axis collimated laser diodes at room temperature. The maximum continuous-wave output power of 10.4 W was obtained while the absorbed pump power was 31.6 W and the cavity length was 30 mm. For Q-switched operation, we got the maximum pulse energy of 8 mJ with pulse width of 315.2 ns at 1 KHz pulse repetition frequency.
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http://dx.doi.org/10.1364/oe.17.014895 | DOI Listing |
Magn Reson Med
September 2025
Centre for Integrative Neuroimaging, FMRIB Division, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK.
Purpose: To develop a deep learning-based reconstruction method for highly accelerated 3D time-of-flight MRA (TOF-MRA) that achieves high-quality reconstruction with robust generalization using extremely limited acquired raw data, addressing the challenge of time-consuming acquisition of high-resolution, whole-head angiograms.
Methods: A novel few-shot learning-based reconstruction framework is proposed, featuring a 3D variational network specifically designed for 3D TOF-MRA that is pre-trained on simulated complex-valued, multi-coil raw k-space datasets synthesized from diverse open-source magnitude images and fine-tuned using only two single-slab experimentally acquired datasets. The proposed approach was evaluated against existing methods on acquired retrospectively undersampled in vivo k-space data from five healthy volunteers and on prospectively undersampled data from two additional subjects.
J Chem Theory Comput
September 2025
Materials DX Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 2, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan.
The quantum mechanics/molecular mechanics (QM/MM) method is a powerful approach for investigating solid surfaces in contact with various types of media, since it allows for flexible modeling of complex interfaces while maintaining an all-atom representation. The mean-field QM/MM method is an average reaction field model within the QM/MM framework. The method addresses the challenges associated with the statistical sampling of interfacial atomic configurations of a medium and enables efficient calculation of free energies.
View Article and Find Full Text PDFSci Adv
September 2025
Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Mexico City, Mexico.
Based on measurements of near-trench deformations of the oceanic and overriding plates, in this investigation, we elucidate the tectonic and mechanical processes leading to the 7.0 (moment magnitude of 7.0) Acapulco, Mexico, earthquake in 2021.
View Article and Find Full Text PDFChemosphere
September 2025
UMR Epoc 5805, Bordeaux-INP. 1 Allée Daguin, 33607, Pessac cedex, France. Electronic address:
In order to validate some assumptions and calculations of Johnson and Ettinger's model, a mapping of measured VOC fluxes in a heavily contaminated building was undertaken. To this end, both advective and diffusive flux measurements were carried out under real conditions. Diffusive fluxes were measured with flux chambers recording the initial concentration rise during the first minutes.
View Article and Find Full Text PDFJ Radiol Prot
September 2025
Radiological Physics & Advisory Division, Bhabha Atomic Research Centre, Mumbai, Maharashtra, INDIA.
Purpose This foundational study aims to support the development of regional Diagnostic Reference Levels (DRLs) for mammography screening in India by estimating Mean Glandular Dose (MGD) using appropriate breast-equivalent phantoms across Computed Mammography (CR), Digital Mammography (DR), and Digital Breast Tomosynthesis (DBT) systems. Additionally, system-displayed MGD values were compared with calculated MGDs to evaluate their accuracy for routine clinical use. Methods A total of 5,000 mammographic views were collected across CR, DR, and DBT units.
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