Results 61 to 70 of about 624,709 (272)

Laminar Free Convection In Horizontal Annulus Filled With Glass Beads And With Annular Fins On The Inner Cylinder

open access: yesJournal of Engineering, 2023
An experimental and numerical study has been carried out to investigate the heat transfer by natural convection and radiation in a two dimensional annulus enclosure filled with porous media (glass beads) between two horizontal concentric cylinders.
Manal Hadi Saleh, Ahmed Mohsen Katea
doaj   +1 more source

Value of MRI Outcomes for Preventive and Early‐Stage Trials in Spinocerebellar Ataxias 1 and 3

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To examine the value of MRI outcomes as endpoints for preventive and early‐stage trials of two polyglutamine spinocerebellar ataxias (SCAs). Methods A cohort of 100 participants (23 SCA1, 63 SCA3, median Scale for the Assessment and Rating of Ataxia (SARA) score = 5, 42% preataxic, and 14 gene‐negative controls) was scanned at 3T up ...
Thiago J. R. Rezende   +26 more
wiley   +1 more source

Analytical solution and numerical simulation of the liquid nitrogen freezing-temperature field of a single pipe

open access: yesAIP Advances, 2018
Artificial liquid nitrogen freezing technology is widely used in urban underground engineering due to its technical advantages, such as simple freezing system, high freezing speed, low freezing temperature, high strength of frozen soil, and absence of ...
Haibing Cai   +3 more
doaj   +1 more source

Study on the Instability Mechanism and Grouting Reinforcement Repair of Large-Scale Underground Stopes

open access: yesAdvances in Civil Engineering, 2020
The environmental conditions due to unreasonable mining in underground stopes, the slurry diffusion mechanism in the grouting reinforcement of a stope within its influence, the causes of large-scale instability collapse, and the catastrophic stope ...
Chengyu Xie, Nan Jia, Liwen He
doaj   +1 more source

Dark matter density profiles from the Jeans equation [PDF]

open access: yes, 2004
We make a simple analytical study of radial profiles of dark matter structures, with special attention to the question of the central radial density profile.
Arad   +30 more
core   +1 more source

Baseline Regional Cholinergic Denervation Predicts Cognitive Trajectories in Moderate Parkinson Disease

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Cognitive decline is a disabling and variable feature of Parkinson disease (PD). While cholinergic system degeneration is linked to cognitive impairments in PD, most prior research reported cross‐sectional associations. We aimed to fill this gap by investigating whether baseline regional cerebral vesicular acetylcholine transporter ...
Taylor Brown   +6 more
wiley   +1 more source

Free Vibration of Partially Supported Cylindrical Shells

open access: yesShock and Vibration, 1995
The effects of detached base length on the natural frequencies and modal shapes of cylindrical shell structures were investigated in this work. Some of the important applications for this type of problem can be found in the cracked fan and rotor blades ...
S. Mirza, Y. Alizadeh
doaj   +1 more source

Some counterexamples related to sectorial matrices and matrix phases

open access: yesExamples and Counterexamples, 2021
A sectorial matrix is an n×nmatrix whose numerical range is contained in an open half-plane, and such matrices have many nice properties. In particular, the subset of strictly accretive matrices is a convex cone in the space of n×nmatrices, and results ...
Xin Mao, Li Qiu, Axel Ringh, Dan Wang
doaj   +1 more source

Neurovascular Contacts in the Pathophysiology of Neuralgic Amyotrophy: An Observational Study

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Neuralgic amyotrophy (NA) is a prevalent, monophasic, multifocal immune‐mediated neuropathy. A distinctive characteristic of the disease is the occurrence of nerve or fascicle constrictions and torsions (NA‐associated focal nerve lesions, NAFL). The pathophysiology underlying this phenomenon remains to be fully elucidated.
Johannes Fabian Holle   +4 more
wiley   +1 more source

Improved quark mass density- dependent model with quark and non-linear scalar field coupling

open access: yes, 2005
The improved quark mass density- dependent model which includes the coupling between the quarks and a non-linear scalar field is presented. Numerical analysis of solutions of the model is performed over a wide range of parameters.
Benreuuto O G   +11 more
core   +1 more source

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