Results 1 to 10 of about 141,792 (282)

Closed-loop MOEMS accelerometer

Optics Express, 2022
In this paper, a closed-loop micro-opto-electro-mechanical system (MOEMS) accelerometer based on the Fabry-Pérot (FP) interferometer is presented. The FP cavity is formed between the end of a cleaved single-mode optical fiber and the cross-section of a proof mass (PM) which is suspended by four U-shaped springs.
Majid Taghavi, Abolfazl Abedi, Gholam-Mohammad Parsanasab, Mojtaba Rahimi, Mohammad Noori, Hamzeh Nourolahi, Hamid Latifi   +6 more
openaire   +3 more sources

Cardiorespiratory fitness, but not physical activity, is associated with academic achievement in children and adolescents

Annals of Human Biology, 2017
Background: Cardiorespiratory fitness (CRF) and physical activity (PA) seem to have positive effects on academic achievement (AA), although in most studies, objective methods of assessment have not been used.
Tânia Oliveira, Andreia Pizarro, Manuela Costa, Luís Fernandes, Gustavo Silva, Jorge Mota, José Carlos Ribeiro   +6 more
doaj   +1 more source

Identification of the Rumination in Cattle Using Support Vector Machines with Motion-Sensitive Bolus Sensors

Sensors, 2019
The reticuloruminal function is central to the digestive efficiency in ruminants. For cattle, collar- and ear tag-based accelerometer monitors have been developed to assess the time spent ruminating on an individual animal.
Andrew W. Hamilton, Chris Davison, Christos Tachtatzis, Ivan Andonovic, Craig Michie, Holly J. Ferguson, Laura Somerville, Nicholas N. Jonsson   +7 more
doaj   +1 more source

An Integrated Testing Solution for Piezoelectric Sensors and Energy Harvesting Devices

Measurement Science Review, 2022
With the fast growth of wireless communications between nodes and sensor units and the increase of devices installed in remote places, and the development of IIoT applications, new requirements for power energy supply are needed to assure device ...
Pereira José Dias, Alves Mário
doaj   +1 more source

Inertial Sensors—Applications and Challenges in a Nutshell

Sensors, 2020
This editorial provides a concise introduction to the methods and applications of inertial sensors. We briefly describe the main characteristics of inertial sensors and highlight the broad range of applications as well as the methodological challenges ...
Thomas Seel, Manon Kok, Ryan S. McGinnis
doaj   +1 more source

Evaluation of the Continuous Wavelet Transform for Detection of Single-Point Rub in Aeroderivative Gas Turbines with Accelerometers

Sensors, 2018
A common fault in turbomachinery is rotor–casing rub. Shaft vibration, measured with proximity probes, is the most powerful indicator of rotor–stator rub.
Alejandro Silva, Alejandro Zarzo, Juan M. Munoz-Guijosa, Francesco Miniello   +3 more
doaj   +1 more source

Simple Calibration of Three-Axis Accelerometers with Freely Rotating Vertical Bench

Sensors
This article presents a dynamic calibration procedure for triaxial accelerometers characterized by a very simple and low-cost setup, where the calibration bench consists of a vertically, freely rotating wheel. To keep the setup as simple as possible, the
Federico Pedersini
doaj   +1 more source

Accelerometers in Monitoring Systems for Rail Vehicle Applications: A Literature Review

Applied System Innovation
This document comprehensively analyses the literature on accelerometers used in monitoring systems designed for rail vehicle applications. It reviews the current research on this topic and highlights key findings, methodologies, and trends in the field ...
Emil Tudor, Ionuț Vasile, Daniel Lipcinski, Constantin Dumitru, Nicolae Tănase, Florian Drăghici, Gabriel Popa   +6 more
doaj   +1 more source

Hyperactivity and motoric activity in ADHD: Characterization, assessment, and intervention

Frontiers in Psychiatry, 2014
The aim of the present literature review is threefold. (1) We will review theories, models, and studies on symptomatic hyperactivity and motoric activity in ADHD.
Caterina eGawrilow, Caterina eGawrilow, Jan eKuehnhausen, Johanna eSchmid, Gertraud eStadler   +4 more
doaj   +1 more source

GMAC—A Simple Measure to Quantify Upper Limb Use From Wrist-Worn Accelerometers

IEEE Transactions on Neural Systems and Rehabilitation Engineering
Various measures have been proposed to quantify upper-limb use through wrist-worn inertial measurement units. The two most popular traditional measures of upper-limb use – thresholded activity counts (TAC) and the gross movement (GM) score suffer ...
Sivakumar Balasubramanian
doaj   +1 more source