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Instability of Vertical Throughflows in Bidisperse Porous Media

open access: yesPhysics, 2021
In this paper, the instability of a vertical fluid motion, or throughflow, is investigated in a horizontal bidisperse porous layer that is uniformly heated from below.
Florinda Capone, Roberta De Luca
doaj   +3 more sources

Vertical spinal instability – Advanced neuromuscular therapy protocol

open access: yesInterdisciplinary Neurosurgery, 2021
The term vertical spinal instability (VSI) was popularised by Atul Goel following his extensive research work in the field of spine disorders. Many spinal degenerative disc disease, have been treated by his innovative surgical techniques, based on this ...
K. Ragurajaprakash
doaj   +2 more sources

Management of Rotational Instability After Anterior Cruciate Ligament Reconstruction [PDF]

open access: yesVideo Journal of Sports Medicine
Background: Femoral tunnel malposition is a leading cause of anterior cruciate ligament (ACL) graft failure, accounting for 63% of cases. Accurate tunnel placement and proper alignment of the reconstructed ACL are essential for restoring knee stability ...
Dileepa Banagala MD   +3 more
doaj   +2 more sources

Relationship Between Identification of Functional Ankle Instability (IdFAI) Questionnaire Scores and Vertical Drop-Landing Kinetics in Netball Players: An Exploratory Study [PDF]

open access: yesJournal of Functional Morphology and Kinesiology
Background: The Identification of Functional Ankle Instability (IdFAI) questionnaire is widely used to screen for functional ankle instability (FAI), but its link to objective landing kinetics in multidirectional sports like netball is not well ...
Darren-Lee Percy Kwong   +2 more
doaj   +2 more sources

Adaptive Tikhonov regularization and dynamic control points for accurate shape parameter control of plasmas

open access: yesNuclear Fusion, 2023
Precise control of plasma shape parameters, such as elongation and triangularity is duly needed to achieve high-performance tokamak plasmas, for which we propose adaptive search schemes of (1) optimum regularization parameter for the Tikhonov ...
S. Inoue   +4 more
doaj   +1 more source

Managing the Risk of Wellbore Instability Using Geomechanical Modeling and Wellbore Stability Analysis for Muzhil Shale Formation in Gulf of Suez, Egypt [PDF]

open access: yesJES: Journal of Engineering Sciences, 2023
Wellbore instability constitutes potential risks during wellbore drilling operation; these risks may cause complicated states, and in some cases, can lead to costly operational issues.
Ahmed Mohamed   +3 more
doaj   +1 more source

Removing spurious inertial instability signals from gravity wave temperature perturbations using spectral filtering methods [PDF]

open access: yesAtmospheric Measurement Techniques, 2020
Gravity waves are important drivers of dynamic processes in particular in the middle atmosphere. To analyse atmospheric data for gravity wave signals, it is essential to separate gravity wave perturbations from atmospheric variability due to other ...
C. Strube, M. Ern, P. Preusse, M. Riese
doaj   +1 more source

In-Plane Instability of Parabolic Arches under Uniformly Distributed Vertical Load Coupled with Temperature Gradient Field

open access: yesAdvances in Civil Engineering, 2022
In civil engineering, arches, such as steel arch roofs and arch bridges, are often subjected to linear temperature gradient field. It is known that the in-plane instability of parabolic arches is caused by the significant axial force.
Zhenyu Pan   +6 more
doaj   +1 more source

Numerical Simulation of the Instability of a Non-Isothermal Liquid Film in Film Devices [PDF]

open access: yesMATEC Web of Conferences, 2021
This work presents results of numerical simulation of the instability of vertical liquid film flow at moderate Reynolds numbers in the framework of partial differential equation of the state of the free surface of the liquid film.
Prokudina L.A., Vikhirev M.P.
doaj   +1 more source

Surgical treatment outcome on a national cohort of 176 patients with cervical manifestation of rheumatoid arthritis

open access: yesJournal of Craniovertebral Junction and Spine, 2021
Purpose: Rheumatoid arthritis (RA) affecting the cervical spine results in instability and deformity that can be divided into the subtypes C1–C2 horizontal (atlantoaxial instability), C0–C2 vertical (basilar invagination), subaxial, and combined ...
Anna MacDowall   +2 more
doaj   +1 more source

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