The symmetry of a physical system strongly impacts on its properties. In toroidal plasmas, the symmetry along a magnetic field line usually constrains the radial flux of parallel momentum to zero in the absence of background flows. By breaking the up-down symmetry of the toroidal currents, this constraint can be relaxed. The parallel asymmetry in the magnetic configuration then leads to an incomplete cancellation of the turbulent momentum flux across a flux surface. The magnitude of the subsequent toroidal rotation increases with the up-down asymmetry and its sign depends on the direction of the toroidal magnetic field and plasma current. Such a mechanism offers new insights in the interpretation and control of the intrinsic toroidal rotation in present day experiments.
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http://dx.doi.org/10.1103/PhysRevLett.102.125001 | DOI Listing |
Heliyon
January 2025
Department of Mechanical Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran.
Background: The development of heat transfer devices used for heat conversion and recovery in several industrial and residential applications has long focused on improving heat transfer between two parallel plates. Numerous articles have examined the relevance of enhancing thermal performance for the system's performance and economics. Heat transport is improved by increasing the Reynolds number as the turbulent effects grow.
View Article and Find Full Text PDFHealth Promot Pract
January 2025
The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
As calls for improved menstrual health management have gained momentum in sociopolitical contexts, period poverty and menstrual equity have gradually been established and recognized in the discipline of public health. These conversations typically take place in the context of low- and middle-income countries (LMICs) where donor-sponsored projects are already underway. Nevertheless, research on period poverty in high-income countries (HICs) is seldom performed.
View Article and Find Full Text PDFFront Plant Sci
December 2024
Jiangxi Branch of China National Tobacco Corporation, Nanchang, China.
Due to the constraints of the tobacco leaf curing environment and computational resources, current image classification models struggle to balance recognition accuracy and computational efficiency, making practical deployment challenging. To address this issue, this study proposes the development of a lightweight classification network model for recognizing tobacco leaf curing stages (TCSRNet). Firstly, the model utilizes an Inception structure with parallel convolutional branches to capture features at different receptive fields, thereby better adapting to the appearance variations of tobacco leaves at different curing stages.
View Article and Find Full Text PDFContemp Nurse
December 2024
Department of Rehabilitation Science, Clinic for Rehabilitation Muenster, Groeben 700, Muenster 6232, Austria.
Background: The number of patients with neurological disorders and severe disability is increasing globally. These patients often need help with positioning and the amount of support varies with their level of impairment. High rates of work-related musculoskeletal disorders are observed among healthcare professionals (HCP) with patient contact due to injuries during manual handling.
View Article and Find Full Text PDFJ Chem Phys
December 2024
Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM, Toluca de Lerdo 50200, Mexico.
In this article, we provide details of the suite DensToolKit-v2, which consists of a set of cross-platform, optionally parallelized programs for analyzing the molecular electron density (ρ), as well as different fields and chemical indices derived from it. Notably, with this version, the user can compute the Non-Covalent Interaction index, the Density Overlap Regions Index, and fields related to single-spin-type molecular orbitals, such as the spin density. In addition, DensToolKit-v2 includes several programs for analyzing other less-known fields, such as the Density Matrix of order 1, the two-electron pair density function, and the Fourier transforms of these fields, that is, functionals in momentum space.
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