BACKGROUND Recently, pattern recognition methods have been deployed in the classification of multiple activation states from mechanomyogram (MMG) signals for the purpose of controlling switching interfaces. Given the propagative properties of MMG signals, it has been suggested that MMG classification should be robust to changes in sensor placement. Nonetheless, this purported robustness remains...

PURPOSE To derive a regression equation that estimates metabolic equivalent (MET) from accelerometer counts, and to define thresholds of accelerometer counts that can be used to delineate sedentary, light, moderate, and vigorous activity in adolescent girls. METHODS Seventy-four healthy 8th grade girls, age 13 - 14 yr, were recruited from urban areas of Baltimore, MD, Minneapolis/St. Paul, MN...

BACKGROUND Differences in the characteristics of respondents and nonrespondents to a survey can be a cause of selection bias. The aim of this study was to determine the sociodemographic and lifestyle characteristics of respondents to a field-based accelerometry survey. METHODS A cross-sectional mail survey was sent to 4000 adults (50% male; age 20 to 69 years) who were randomly selected from ...

The aim of the present study was to examine the ability of a GPS-imbedded accelerometer to assess stride variables and vertical stiffness (K), which are directly related to neuromuscular fatigue during field-based high-intensity runs. The ability to detect stride imbalances was also examined. A team sport player performed a series of 30-s runs on an instrumented treadmill (6 runs at 10, 17 and ...

PURPOSE Imprecise measurement of physical activity variables might attenuate estimates of the beneficial effects of activity on health-related outcomes. We aimed to compare the cardiometabolic risk factor dose-response relationships for physical activity and sedentary behaviour between accelerometer- and questionnaire-based activity measures. METHODS Physical activity and sedentary behaviour ...

,4bswct: Recently. many algorithms have been developed for airbag system to reduce head injury during the crash. Most of these algorithms are based on a single-point electronic accelerometer placed in the passenger compartment. This accelerometer is expected to overcome the limitations of the current distributed mechanical sensors which is costly and ineffective to trigger the airbag on time fo...

OBJECTIVE To investigate characteristics associated with wearing an accelerometer for the required and requested time among 8-year-old to 10-year-old children. DESIGN Cross-sectional. SETTING 60 Bristol and North Somerset primary schools taking part in the 'Active for Life Year 5' randomised controlled trial (RCT) in 2011. PARTICIPANTS 2048 children, aged 8-10 years, invited to wear an ac...

Background Agreement between questionnaires and accelerometers to measure physical activity (PA) differs between studies and might be related to demographic, lifestyle, and health characteristics, including disability and depressive symptoms. Methods We included 1,410 individuals aged 51-94 years from the population-based Rotterdam Study. Participants completed the LASA Physical Activity Ques...

the use of quantitative structure–activity relationships, since its advent, has becomeincreasingly helpful in understanding many aspects of biochemical interactions in drug research.this approach was utilized to explain the relationship of structure with biological activity ofantibacterial. for the development of new fungicides against, the quantitative structural–activityrelationship (qsar) an...

Our goal is to make gesture-based input for smartphones and smartwatches accurate and feasible to use. With a custom Android application to record accelerometer data for 5 gestures, we developed a highly accurate SVM classifier using only 1 training example per class. Our novel Dynamic-Threshold Truncation algorithm during preprocessing improved accuracy on 1 training example per class by 14% a...