Results 31 to 40 of about 235,893 (331)

Data Quality Assessment of Gravity Recovery and Climate Experiment Follow-On Accelerometer

open access: yesSensors
Accelerometers are mainly used to measure the non-conservative forces at the center of mass of gravity satellites and are the core payloads of gravity satellites.
Zongpeng Pan, Yun Xiao
doaj   +1 more source

The validity of the Youth Physical Activity Questionnaire in 12-13 year old Scottish adolescents [PDF]

open access: yes, 2017
Background: The development of accurate methods to measure health-behaviours forms an integral component in behavioural epidemiology. Population surveillance of physical activity often relies on self/proxy reported questionnaires due to cost and relative
Ellaway, Anne   +2 more
core   +1 more source

Study protocol of the self‐monitoring activity program: Effects of activity on incident dementia

open access: yesAlzheimer’s & Dementia: Translational Research & Clinical Interventions, 2019
Introduction Numerous studies have focused on nonpharmacological interventions on cognitive function and the effects of cognitive function on daily living.
Hiroyuki Shimada   +6 more
doaj   +1 more source

Using open source accelerometer analysis to assess physical activity and sedentary behaviour in overweight and obese adults

open access: yesBMC Public Health, 2018
Background Physical activity and sedentary behaviour are difficult to assess in overweight and obese adults. However, the use of open-source, raw accelerometer data analysis could overcome this.
Paul Innerd, Rory Harrison, Morc Coulson
doaj   +1 more source

On the design of a triaxial accelerometer [PDF]

open access: yes, 1994
Up to now, mainly uniaxial accelerometers are described in most publications concerning this subject. However, triaxial accelerometers are needed in the biomedical field.
Bergveld, Piet   +4 more
core   +3 more sources

Impact of Positive Lifestyle Behaviors on Direct Health Care Cost Savings for Low Back Pain

open access: yesArthritis Care &Research, EarlyView.
Objective This study aimed to investigate the relationship between a previously purpose‐developed lifestyle behavior scale and health care cost savings related to low back pain (LBP). Methods This longitudinal study used data from the Australian Twin Back (AUTBACK) study. LBP and lifestyle behavior measures were collected at baseline. Physical activity
Ye Tian   +8 more
wiley   +1 more source

Resonance Effect Decrease and Accuracy Increase of Piezoelectric Accelerometer Measurement by Appropriate Choice of Frequency Range

open access: yesShock and Vibration, 2018
A suitable piezoelectric accelerometer mathematical model is proposed to extract a relationship of motion relative frequency as a function of natural frequency.
Zine Ghemari   +2 more
doaj   +1 more source

A New Z-axis Resonant Micro-Accelerometer Based on Electrostatic Stiffness

open access: yesSensors, 2015
Presented in the paper is the design, the simulation, the fabrication and the experiment of a new z-axis resonant accelerometer based on the electrostatic stiffness. The new z-axis resonant micro-accelerometer, which consists of a torsional accelerometer
Bo Yang   +3 more
doaj   +1 more source

Pengembangan Mekanisme Change Detection Untuk Efisiensi Energi Pada Wifi-Based Indoor Positioning System

open access: yesJurnal ELTIKOM: Jurnal Teknik Elektro, Teknologi Informasi dan Komputer, 2020
Pengembangan mekanisme change detection mempunyai peranan penting terhadap Indoor Positioning System (IPS). Namun permasalahan yang masih umum dijumpai adalah konsumsi energi yang tinggi, karena proses WiFi scanning berjalan secara terus menerus.
Ade Hendi   +2 more
doaj   +1 more source

Active nutation controller [PDF]

open access: yes, 1980
An apparatus is described for controlling nutation motion in a spinning body, comprised of an angular accelerometer with its input axis perpendicular to the spin axis of the body, a flywheel with an axis of rotation perpendicular to the axis of the ...
Donohue, J. H., Hoffman, H. C.
core   +1 more source

Home - About - Disclaimer - Privacy