Results 21 to 30 of about 215,914 (279)

Electrical and Ca2+ signaling in dendritic spines of substantia nigra dopaminergic neurons

open access: yeseLife, 2016
Little is known about the density and function of dendritic spines on midbrain dopamine neurons, or the relative contribution of spine and shaft synapses to excitability.
Travis A Hage, Yujie Sun, Zayd M Khaliq
doaj   +1 more source

Nonlinear dynamics of a rotating shaft with a breathing crack [PDF]

open access: yes, 2011
In this paper, the effects of a breathing crack on the vibratory characteris- tics of a rotating shaft are investigated. A new, simple and robust model composed of two rigid bars connected with a nonlinear flexural spring is proposed.
Saber El Arem   +3 more
core   +1 more source

Investigation on Centrifugal Pump Shaft: A Comparison Study of the SME and the Imported Product [PDF]

open access: yes, 2012
The implementation of the ASEAN-China Free Trade Agreement (ACFTA) forces the small and medium enterprises to have a high competition between the manufacturer from China and the ASEAN member countries.
S, Sugiyanto   +3 more
core   +1 more source

A 3D Reduced Common Mode Voltage PWM Algorithm for a Five-Phase Six-Leg Inverter

open access: yesMachines, 2023
Neutral point voltage control converters (NPVCC) are being considered for AC drive applications, where their additional degree of freedom can be used for different purposes, such as fault tolerance or common mode voltage (CMV) reduction.
Markel Fernandez   +5 more
doaj   +1 more source

Bearing current and shaft voltage measurement in electrical motors

open access: yes, 2017
Due to the fast-rising voltage pulses of pulse width modulated drives, the generated shaft voltage of electrical motors causes electrical discharge currents in bearings. These discharges can cause bearing failure leading to costly maintenance and unexpected production stops.
Kolic, Edo
core   +3 more sources

Advanced Diagnostic Techniques for Earthing Brush Faults Detection in Large Turbine Generators

open access: yesEnergies
Large steam turbine generators are increasingly vulnerable to damage from shaft voltages and bearing currents due to the widespread adoption of modern power electronic excitation systems and more flexible operating regimes.
Katudi Oupa Mailula, Akshay Kumar Saha
doaj   +1 more source

Brainless Walking: Animal Gaits Emerge From an Actuator Characteristic

open access: yesFrontiers in Robotics and AI, 2021
In this study, we discovered a phenomenon in which a quadruped robot without any sensors or microprocessor can autonomously generate the various gait patterns of animals using actuator characteristics and select the gaits according to the speed.
Yoichi Masuda   +3 more
doaj   +1 more source

Research on the Accumulative Damage of Flywheels Due to In-Space Charging Effects

open access: yesAerospace
High-speed rotating flywheel bearings, designed for space applications, generate a high-resistance hydrodynamic lubrication film, which isolates the rotor, transforming it into a conductor. This phenomenon introduces a novel failure mode—flywheel bearing
Dong Tian   +6 more
doaj   +1 more source

Sensorless MRAS control of emerging doubly‐fed reluctance wind generators

open access: yesIET Renewable Power Generation, 2021
A new model reference adaptive system based estimation technique for vector control of real and reactive power of a brushless doubly fed reluctance generator without a shaft position sensor is proposed.
Mohammad‐Reza Agha‐Kashkooli   +1 more
doaj   +1 more source

Untitled Speech by Harold Shaft, Winter Commencement: January 26, 1963 [PDF]

open access: yes, 1963
Text of speech delivered by Harold Shaft at the UND Winter Commencement on January 26, 1963. This commencement address was Shaft\u27s second time speaking at a UND Commencement; previously, he spoke at the UND Summer Commencement on August 5 ...
Shaft, Harold
core   +1 more source

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