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Classifiers for Accelerometer-Measured Behaviors in Older Women
MACHINE LEARNING OLDER ADULTS SITTING WALKING PHYSICAL ACTIVITY SEDENTARY TIME
2018/4/24
Purpose Machine learning methods could better improve the detection of specific types of physical activities and sedentary behaviors from accelerometer data. No studies in older populations have devel...
An Evaluation of Accelerometer-derived Metrics to Assess Daily Behavioral Patterns
PHYSICAL ACTIVITY EPIDEMIOLOGY MEASUREMENT ASSESSMENT SEDENTARY BEHAVIOR
2018/4/24
Introduction The way physical activity (PA) and sedentary behavior (SB) are accumulated throughout the day (i.e., patterns) may be important for health, but identifying measurable and meaningful metri...
Accelerometer-measured dose-response for physical activity, sedentary time, and mortality in US adults
sedentary behavior physical activity mortality accelerometer light-intensity activity moderate-to-vigorous intensity activity
2018/12/18
Background: Moderate-to-vigorous–intensity physical activity is recommended to maintain and improve health, but the mortality benefits of light activity and risk for sedentary time remain uncertain.
Use of a triaxial accelerometer to validate reported food intakes
elderly underreporting underrecording
2016/6/12
An easy and cheap method for validating reported
energy intake (EI) is needed.
Sedentary Sphere: Wrist-Worn Accelerometer-Brand Independent Posture Classification
GENEACTIV ACTIGRAPH ACTIVPAL SITTING TRIAXIAL
2017/4/13
Introduction: Access to raw acceleration data should facilitate comparisons between accelerometer outputs regardless of monitor brand.
Purpose: To evaluate the accuracy of posture classification usin...
Tri-Axial Accelerometer-Determined Daily Physical Activity and Sedentary Behavior of Suburban Community-Dwelling Older Japanese Adults
Tri-axial accelerometer physical activity sedentary behavior community-based study older adults
2016/1/11
Knowledge regarding accelerometer-derived physical activity (PA) and sedentary behavior (SED) levels is scarce for Japanese older adults. The aims of this study were therefore to 1) describe levels of...
A sapphire monolithic differential accelerometer as core sensor for gravity gradiometric geophysical instrumentation
gradiometric gravimeter accelerometer Whispering gallery cavity
2015/9/8
Gradiometric gravimetry is a survey technique widely used in geological structure investigation. This work demonstrates the feasibility of a new class of low frequency accelerometers for geodynamics s...
Basic Study On The Real-time Three-dimensional Position Measurement of Ground Moving Objects Using An Accelerometer and Gyros
Surveying Development Measurement
2015/7/15
In recent years, electronics and computer technology have been applied to the development of survey instruments, and
the methods of measurement have widely changed. We make use of sophisticated syste...
Towards Uniform Accelerometry Analysis: A Standardization Methodology to Minimize Measurement Bias Due to Systematic Accelerometer Wear-Time Variation
Accelerometry wear-time variation data standardization
2015/5/22
Accelerometers are predominantly used to objectively measure the entire range of activity intensities – sedentary behaviour (SED), light physical activity (LPA) and moderate to vigorous physical activ...
Relationships Between Accelerometer-Assessed Physical Activity and Health in Children: Impact of the Activity-Intensity Classification Method
ActiGraph activity guidelines MVPA thresholds
2015/4/21
It is unknown whether relationships detected between physical activity intensity and health differ according to accelerometer thresholds used [sample-specific thresholds (SSTs), published thresholds (...
Using GPS, GIS, and Accelerometer Data to Predict Transportation Modes
PHYSICAL ACTIVITY ACTIVE TRANSPORT PASSIVE DATA COLLECTION MACHINE LEARNING RECORD COHORT STUDY FRANCE
2017/4/20
Introduction: Active transportation is a substantial source of physical activity, which has a positive influence on many health outcomes. A survey of transportation modes for each trip is challenging,...
Visual Inspection for Determining Days When Accelerometer Is Worn: Is This Valid?
PHYSICAL ACTIVITY EPIDEMIOLOGY WEAR TIME OLDER ADULTS
2017/4/20
Logs have been traditionally used for ascertaining accelerometer wear days in mail study designs, but not all participants complete logs. Visual inspection of accelerometer output may supplement missi...
Energy Expenditure Prediction Using Raw Accelerometer Data in Simulated Free Living
ACCELEROMETRY MACHINE LEARNING ARTIFICIAL NEURAL NETWORK PHYSICAL ACTIVITY
2017/4/19
Purpose: The purpose of this study was to develop, validate, and compare energy expenditure (EE) prediction models for accelerometers placed on the hip, thigh, and wrists using simple accelerometer fe...
Obtaining Accelerometer Data in a National Cohort of Black and White Adults
PHYSICAL ACTIVITY ADULTS PARTICIPATION LONGITUDINAL STUDIES MEASUREMENT
2017/4/19
Purpose: The objective of this study is to report methodological details and feasibility of conducting an accelerometer ancillary study in a large US cohort being followed for stroke and cognitive dec...
Accelerometer Validation of Questionnaires Used in Clinical Settings to Assess MVPA
PHYSICAL ACTIVITY ACCELEROMETRY PHYSICAL ACTIVITY QUESTIONNAIRE SENSITIVITY SPECIFICITY VALIDITY
2017/4/19
Introduction: The exercise vital sign (EVS) and General Practice Physical Activity Questionnaire (GPPAQ) are questionnaires designed for clinical settings to identify individuals who are not meeting p...