Results 1 to 10 of about 45,007 (189)
No evidence of reactivity in accelerometry-based measurement of physical activity and sleep. [PDF]
Br J Health PsycholAbstract Objective Accelerometry provides more objective estimates of physical activity and sleep parameters than self‐report data. However, the use of accelerometry may suffer from reactivity to measurement, that is, changes in behaviour under study due to the awareness of being observed.
Häusser JA +3 more
europepmc +2 more sources
Membrane-Based Optomechanical Accelerometry
Physical Review Applied, 2023 Optomechanical accelerometers promise quantum-limited readout, high detection bandwidth, self-calibration, and radiation pressure stabilization. We present a simple, scalable platform that enables these benefits with nano-$g$ sensitivity at acoustic frequencies, based on a pair of vertically integrated Si$_3$N$_4$ membranes with different stiffnesses ...
Mitul Dey Chowdhury +2 more
openaire +2 more sources
Demonstration of the Effect of Centre of Mass Height on Postural Sway Using Accelerometry for Balance Analysis [PDF]
, 2020 The effect of center of mass (COM) height on stand-still postural sway analysis was studied. For this purpose, a measurement apparatus was set up that included an accelerometry unit attached to a rod: three plumb lines, positioned at 50 cm, 75 cm, and ...
Ojie, Oseikhuemen Osemekhian Davis +2 more
core +1 more source
Multicolor particle shadow accelerometry [PDF]
Measurement Science and Technology, 2015 This paper describes the extension of multicolor particle shadow velocimetry (CPSV) to the measurement of local acceleration in an Eulerian frame of reference. A validation experiment was conducted on a pendulous disk undergoing unsteady rigid body rotation.
M J, McPhail +4 more
openaire +2 more sources
Journal of Human Sport and Exercise, 2016 The possibilities to analyse various sports movements and activities, their techniques and dynamics are deepening and enhancing with the rapid development of modern technologies. It subsequently enables to improve and enhance sports techniques, performances and efficiency, to prevent possible injuries, to enhance training methods, and to reach sports ...
Lukášek, Miloš, Vychodilová, Renáta
openaire +2 more sources
Temporal Alignment of Dual Monitor Accelerometry Recordings [PDF]
Sensors, 2021 Combining accelerometry from multiple independent activity monitors worn by the same subject have gained widespread interest with the assessment of physical activity behavior. However, a difference in the real time clock accuracy of the activity monitor introduces a substantial temporal misalignment with long duration recordings which is commonly not ...
Jan Christian Brønd +3 more
openaire +5 more sources
Milky Way Accelerometry via Millisecond Pulsar Timing [PDF]
Physical Review Letters, 2021 The temporal stability of millisecond pulsars is remarkable, rivaling even some terrestrial atomic clocks at long timescales. Using this property, we show that millisecond pulsars distributed in the galactic neighborhood form an ensemble of accelerometers from which we can directly extract the local galactic acceleration.
David F. Phillips +3 more
openaire +3 more sources
Social, environmental and psychological factors associated with objective physical activity levels in the over 65s [PDF]
, 2012 Objective: To assess physical activity levels objectively using accelerometers in community dwelling over 65 s and to examine associations with health, social, environmental and psychological factors. Design: Cross sectional survey.
Crombie, Iain K +7 more
core +9 more sources
Cervical accelerometry in preterm infants [PDF]
Developmental Medicine & Child Neurology, 2002 The objective of this study was to develop a method to use digital signal processing (DSP) technology to describe quantitatively and statistically swallow‐associated sounds in preterm infants and to use this method to analyze changes as infants mature. Twelve recordings of accelerometric and physiological data on bottle‐feeding preterm infants between ...
Eric W, Reynolds +3 more
openaire +2 more sources
Association of Accelerometry-Measured Physical Activity and Cardiovascular Events in Mobility-Limited Older Adults: The LIFE (Lifestyle Interventions and Independence for Elders) Study. [PDF]
, 2017 BACKGROUND:Data are sparse regarding the value of physical activity (PA) surveillance among older adults-particularly among those with mobility limitations. The objective of this study was to examine longitudinal associations between objectively measured
Abbie Wrights +124 more
core +2 more sources