Results 101 to 110 of about 278,740 (250)

Damping Torsional Oscillations Using Thyristor Controlled Braking Resistors

Journal of King Saud University: Engineering Sciences, 2001
This paper presents a new method for controlling a dynamic braking resistor in power system. It allows a Thyristor Controlled Braking Resistor (TCBR) to effectively damp inertial and torsional oscillations in a large turbo-generator.
R.M. Hamouda
doaj   +1 more source

Real‐World Patterns of Botulinum Toxin Treatment in Hyperkinetic Movement Disorders: A 9‐Year Nationwide Analysis in France

Movement Disorders Clinical Practice, EarlyView.
Abstract Background Hyperkinetic movement disorders, including dystonia, tremor, and myoclonus, are disabling conditions often managed with botulinum toxin type A (BoNT‐A). Real‐world evidence on treatment patterns remains limited. Objective This nationwide, population‐based study aimed to evaluate trends in BoNT‐A use in France between 2015 and 2023 ...
Marion Simonetta‐Moreau, Pierre Karam, Anne Forestier, Bertrand Degos   +3 more
wiley   +1 more source

Driving Cerebellar Theta Oscillations Interferes With Voluntary Neck Movements in Cervical Dystonia

Movement Disorders, EarlyView.
Abstract Background Cervical dystonia (CD) is a movement disorder with a complex pathophysiology, including cerebellar abnormalities. Transcranial alternating current stimulation (tACS), a noninvasive neuromodulation technique capable of entraining brain oscillations, can transiently modulate neuronal activity and enhance resonant rhythms.
Davide Costa, Andrea Guerra, Daniele Birreci, Massimiliano Passaretti, Martina De Riggi, Anna Sofia Grandolfo, Valentina D'Onofrio, Luca Angelini, Giulia Paparella, Matteo Bologna   +9 more
wiley   +1 more source

Constraining the Nuclear Equation of State of a Neutron Star via High-frequency Quasi-periodic Oscillation in Short Gamma-Ray Bursts

The Astrophysical Journal
The determination of the equation of state (EOS) of a neutron star (NS) and its maximum mass is very important for understanding the formation and properties of NSs under extreme conditions, but they remain open questions. Short-duration gamma-ray bursts
Jun-Xiang Huang, Hou-Jun Lü, En-Wei Liang   +2 more
doaj   +1 more source

Analysis of Mechanical‐Electrical‐Hydraulic Coupled Vibration Response Characteristics of Thermal Control Circulating Pumps Supported by Water‐Lubricated Bearings

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT The operational reliability of thermal control circulation pumps is significantly restricted by the multi‐physics coupled environment. To reveal the vibration transmission mechanisms and dynamic response characteristics under multi‐field coupled excitations, a multi‐DOF coupled dynamic representation of the overall system, incorporating the ...
Jianfeng Luo, Liukai Hou, Yutao Zou, Kaiyuan Hao, Guangwu Zhou   +4 more
wiley   +1 more source

Analysis of helicopter rotor blade torsional oscillations due to stall [PDF]

, 1975
An analysis of stall-induced helicopter rotor blade torsional oscillations was carried out, the primary objectives being to predict the onset and severity of the oscillations and their relationship to aircraft and blade parameters.
Crimi, P.
core  

An Approach for Computationally Efficient Yet Accurate Modeling of Vibrating Machines With Neidhart Springs

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT Accurate modeling of vibrating machines equipped with Neidhart springs is challenging due to the strong nonlinearities introduced by the elastomer–metal torsional elements and the constraints imposed by their kinematic arrangement. Multibody modeling methodologies for such vibrating machines are often computationally demanding, thus limiting ...
Davide Galli, Veit Gufler, Andrea Giusti, Renato Vidoni   +3 more
wiley   +1 more source

Comparative Analysis of Post‐Buckling Torsional Response in Carbon/Aramid Hybrid and Carbon Fiber Composites: Experimental Evaluation of Synergistic Effects Beyond Macro‐Scale Modeling Limits

Polymer Composites, EarlyView.
Post‐buckling torsional response of carbon fiber (a) and intraply carbon/aramid hybrid (b) composites, revealing yarn‐level interaction beyond macro‐scale modeling limits. ABSTRACT This study investigates the buckling and post‐buckling performance of Carbon Fiber Reinforced Epoxy (CFRE) and intraply Carbon/Aramid Fabric Reinforced Epoxy (C/AFRE ...
G. E. Guloglu, B. Akış
wiley   +1 more source

Optimizing drilling efficiency: Comparative study of stick-slip vibration of steel and aluminum drill strings

Petroleum
This study investigates the torsional stick-slip behavior of steel and aluminum drill strings under varying levels of aggressiveness, which refers to the intensity with which the drill bit interacts with the rock formation.
Chinedu Ejike, Khizar Abid, Chinedu J. Okere, Catalin Teodoriu   +3 more
doaj   +1 more source

Oxidative Stability and Rheological Features in Recycled Composites Based on Postconsumer Polypropylene and Antioxidant‐Loaded Silicas

Polymer Engineering &Science, EarlyView.
Role of antioxidant supported on MCM‐41 and nano‐silica in enhancing oxidation induction time (OIT) and nucleation performance. ABSTRACT Plastic recycling efforts are hindered by the reduction of material properties in recyclates stemming from oxidative degradation of their polymeric chains.
Enrique Blázquez‐Blázquez, Kalman B. Migler, Tamara Díez‐Rodríguez, María L. Cerrada, Ernesto Pérez   +4 more
wiley   +1 more source