Results 21 to 30 of about 138 (115)

Robust Optimal Tracking Control of a Full-Bridge DC-AC Converter

open access: yesApplied Sciences, 2021
This paper develops a full-bridge DC-AC converter, which uses a robust optimal tracking control strategy to procure a high-quality sine output waveshape even in the presence of unpredictable intermissions.
En-Chih Chang   +2 more
doaj   +1 more source

Investigating volcanic hazard in Cape Verde Islands through geophysical monitoring: network description and first results [PDF]

open access: yesNatural Hazards and Earth System Sciences, 2014
We describe a new geophysical network deployed in the Cape Verde Archipelago for the assessment and monitoring of volcanic hazards as well as the first results from the network. Across the archipelago, the ages of volcanic activity range from ca.
B. Faria, J. F. B. D. Fonseca
doaj   +1 more source

Voice analysis before and after vocal rehabilitation in patients following open surgery on vocal cords [PDF]

open access: yesVojnosanitetski Pregled, 2016
Background/Aim. The major role of larynx in speech, respiration and swallowing makes carcinomas of this region and their treatment very influential for patients’ life quality.
Bunijevac Mila   +3 more
doaj   +1 more source

Tremor Reduction at the Palm of a Parkinson’s Patient Using Dynamic Vibration Absorber

open access: yesBioengineering, 2016
Parkinson’s patients suffer from severe tremor due to an abnormality in their central oscillator. Medications used to decrease involuntary antagonistic muscles contraction can threaten their life. However, mechanical vibration absorbers can be used as an
Sarah Gebai   +3 more
doaj   +1 more source

Acoustic characteristics of voice in examinees with moderately-severe hearing loss [PDF]

open access: yesBiomedicinska istraživanja, 2019
Introduction.Voice is the result of vocal cord vibrations and resonance effects of the vocal tract, therefore, the instrumental monitoring of the vibrations themselves is one of the essential aspects of objective instrumental assessment of voice ...
Sladjana Ćalasan   +3 more
doaj   +1 more source

How a non harmonic-like tremor at a volcanic lake could be caused by sustained wind: A case of study of Taupō volcano

open access: yesVolcanica
Taupō volcano lies underneath the largest lake in New Zealand. It undergoes unrest roughly every ten years, has minor eruptions every few hundred years, and has supereruptions.
Henriette Bakkar Hindeleh   +3 more
doaj   +1 more source

Acoustic and hearing-perceptual voice analysis in individuals with idiopathic Parkinson's disease in "on" and "off" stages Análise acústica e perceptivo-auditiva da voz em indivíduos com doença de Parkinson idiopática nos estágios "on" e "off"

open access: yesArquivos de Neuro-Psiquiatria, 2010
OBJECTIVE: To evaluate the voice quality of patients with idiopathic Parkinson's disease, at the "on" and "off" moments of the disease. METHOD: Five individuals with Parkinson's disease and five of the control group were assessed.
Luiza Lara M Santos   +6 more
doaj   +1 more source

Sertraline Treatment Can Mimic Niemann‐Pick Type C Biomarker Profile: A Diagnostic Pitfall

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background Oxysterols (cholestane‐3β,5α,6β‐triol and 7‐ketocholesterol) and N‐palmitoyl‐O‐phosphocholineserine (PPCS) are sensitive biomarkers for Niemann‐Pick disease type C (NPC) screening. However, false‐positive results occur, with a biomarker profile suggestive of NPC despite the absence of pathogenic variants in genes involved in NPC or ...
Maria Makrygianni   +19 more
wiley   +1 more source

Hydroacoustic, Meteorologic and Seismic Observations of the 2016 Nansen Ice Shelf Calving Event and Iceberg Formation

open access: yesFrontiers in Earth Science, 2019
On April 7, 2016 the Nansen ice shelf (NIS) front calved into two icebergs, the first large-scale calving event in >30 years. Three hydrophone moorings were deployed seaward of the NIS in December 2015 and over the following months recorded hundreds ...
R. P. Dziak   +10 more
doaj   +1 more source

Characterization of Acoustic Infrasound Signals at Volcán de Fuego, Guatemala: A Baseline for Volcano Monitoring

open access: yesFrontiers in Earth Science, 2020
Monitoring volcanic unrest and understanding seismic and acoustic signals associated with eruptive activity is key to mitigate its impacts on population and infrastructure.
A. Diaz-Moreno   +7 more
doaj   +1 more source

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