Results 41 to 50 of about 130,751 (270)
Testing the Sound Quality of Acoustic Vacuum Tube Amplifier
Archives of Acoustics, 2008 The study presents analysis of basic electrical parameters and sound quality of two acoustic amplifiers: an acoustic vacuum tube amplifier and a transistor amplifier. Computer-aided measurement methods have been used through the tests.
Stanisław MALECZEK
doaj
A Wireless Sensor Network for Cold-Chain Monitoring [PDF]
, 2009 This paper deals with a wireless sensor network that was specifically designed to monitor temperature-sensitive products during their distribution with the aim of conforming to the cold-chain assurance requirements.
Parvis, Marco +3 more
core +1 more source
Clustering Algorithm Reveals Dopamine‐Motor Mismatch in Cognitively Preserved Parkinson's Disease
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective To explore the relationship between dopaminergic denervation and motor impairment in two de novo Parkinson's disease (PD) cohorts. Methods n = 249 PD patients from Parkinson's Progression Markers Initiative (PPMI) and n = 84 from an external clinical cohort.
Rachele Malito +14 more
wiley +1 more source
Impulsive noise reduction for transient Earth voltage-based partial discharge using Wavelet-entropy
, 2016 Partial discharge (PD) is caused by the localised electrical field intensification in insulating materials. Early detection and accurate measurement of PD are very important for preventing premature failure of the insulating material. Detection of PDs in
Zhang, D +7 more
core +1 more source
A Vision-Based Technique for Lay Length Measurement of Metallic Wire Ropes [PDF]
, 2009 The lay length of metallic wire ropes is an important dimensional quantity whose analysis is useful to highlight rope deformations due to distributed damages.
Molinari, Filippo, Vallan, Alberto
core +1 more source
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Background Accessing brain magnetic resonance imaging (MRI) can be challenging, especially for underserved patients, which may lead to disparities in neurological diagnosis. Method This mixed‐methods study enrolled adults with one of four neurological disorders: mild cognitive impairment or dementia of the Alzheimer type, multiple sclerosis ...
Maya L. Mastick +19 more
wiley +1 more source
Sensors, 2018 This paper proposes a new yet efficient method allowing a significant improvement in the on-line analysis of biological cell growing and evolution. The procedure is based on an empirical-mathematical approach for calibration and fitting of any cell ...
Juan A. Serrano +7 more
doaj +1 more source
Metrological performances of voltage and current instrument transformers in harmonics measurements
, 2018 In the new electrical system scenario, the increasing presence of non-linear loads and renewable energy sources makes the measurement of harmonics an essential task. The accuracy of harmonic measurement firstly depends on the used instrument transformers
D. Gallo +19 more
core +1 more source
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Background Emerging evidence suggests that low‐frequency neural oscillations are dynamically regulated by consciousness levels, with the recovery of low cortical activity potentially serving as a neurophysiological substrate for conscious emergence. Targeted enhancement of these low‐frequency rhythms in patients with disorders of consciousness
Chuan Xu +10 more
wiley +1 more source
Comprehensive Study on Carbon-Coated Silver for Improved Tribo-Electrical and Wetting Performance
CThe rise in electrification has considerably increased the demand for high-efficiency and durable electrical contact materials. Carbon nanoparticles (CNP) are a promising coating material due to their intrinsic transport properties (thus minimizing the ...
Bruno Alderete +2 more
doaj +1 more source