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https://www.readbyqxmd.com/read/29342102/development-of-a-high-sensitivity-wireless-accelerometer-for-structural-health-monitoring
#1
Li Zhu, Yuguang Fu, Raymond Chow, Billie F Spencer, Jong Woong Park, Kirill Mechitov
Structural health monitoring (SHM) is playing an increasingly important role in ensuring the safety of structures. A shift of SHM research away from traditional wired methods toward the use of wireless smart sensors (WSS) has been motivated by the attractive features of wireless smart sensor networks (WSSN). The progress achieved in Micro Electro-Mechanical System (MEMS) technologies and wireless data transmission, has extended the effectiveness and range of applicability of WSSNs. One of the most common sensors employed in SHM strategies is the accelerometer; however, most accelerometers in WSS nodes have inadequate resolution for measurement of the typical accelerations found in many SHM applications...
January 17, 2018: Sensors
https://www.readbyqxmd.com/read/29341873/differences-in-heart-rate-reserve-of-similar-physical-activities-during-work-and-in-leisure-time-a-study-among-danish-blue-collar-workers
#2
Pieter Coenen, Mette Korshøj, David M Hallman, Maaike A Huysmans, Allard J van der Beek, Leon M Straker, Andreas Holtermann
Recent studies suggest that while leisure-time physical activity (LTPA) promotes general health, engaging in occupational physical activity (OPA) may have negative health consequences. It has been hypothesized that the different health effects from OPA and LTPA can be explained by differences in physical activity (PA) intensity in these two domains. To assess the intensity of OPA and LTPA, we aimed to study the percentage heart rate reserve (%HRR) during similar types of OPA and LTPA during workdays. Data from the NOMAD study on Danish blue-collar workers (n=124) with objective measurements of PA (using accelerometers) and heart rate (using heart rate monitors) for 4 workdays were analysed...
January 13, 2018: Physiology & Behavior
https://www.readbyqxmd.com/read/29340271/transit-use-and-physical-activity-findings-from-the-houston-travel-related-activity-in-neighborhoods-train-study
#3
Gregory Knell, Casey P Durand, Kerem Shuval, Harold W Kohl Iii, Deborah Salvo, Ipek Sener, Kelley Pettee Gabriel
Transportation-related physical activity can significantly increase daily total physical activity through active transportation or walking/biking to transit stops. The purpose of this study was to assess the relations between transit-use and self-reported and monitor-based physical activity levels in a predominantly minority population from the Houston Travel-Related Activity in Neighborhoods (TRAIN) Study. This was a cross-sectional analysis of 865 adults living in Houston, Texas between 2013 and 2015. The exposure variable was transit-use (non-users, occasional users, and primary users)...
March 2018: Preventive Medicine Reports
https://www.readbyqxmd.com/read/29340251/the-relationships-between-exercise-and-affective-states-a-naturalistic-longitudinal-study-of-recreational-runners
#4
Tim Bonham, Gillian V Pepper, Daniel Nettle
Background: Although people generally feel more positive and more energetic in the aftermath of exercise than before, longitudinal research on how exercise relates to within-person fluctuations in affect over the course of everyday life is still relatively limited. One constraint on doing such research is the need to provide participants with accelerometers to objectively record their exercise, and pagers to capture affective reports. Aims: We aimed to develop a methodology for studying affect and exercise using only technology that participants already possess, namely GPS running watches and smartphones...
2018: PeerJ
https://www.readbyqxmd.com/read/29338123/choroidal-thickness-and-myopia-in-relation-to-physical-activity-the-champs-eye-study
#5
Kristian Lundberg, Anders Højslet Vestergaard, Nina Jacobsen, Anne Suhr Thykjaer, Rasmus Søgaard Hansen, Ernst Goldschmidt, Tunde Peto, Ulrich Halekoh, Niels Wedderkopp, Jakob Grauslund
PURPOSE: To describe the relationship between choroidal thickness (CT) and myopia in relation to physical activity (PA) in a population-based child cohort. METHODS: In a prospective study of 307 children from the CHAMPS Study Denmark, we used objective data from GT3X accelerometer worn at four periods between 2009 and 2015 to determine the amount and intensity of PA. Intensity was estimated as counts/minutes, and cut-off points were defined at four intensity levels...
January 16, 2018: Acta Ophthalmologica
https://www.readbyqxmd.com/read/29337903/use-of-accelerometer-activity-monitors-to-detect-changes-in-pruritic-behaviors-interim-clinical-data-on-6-dogs
#6
Susan M Wernimont, Robin J Thompson, Scott L Mickelsen, Spencer C Smith, Isabella C Alvarenga, Kathy L Gross
Veterinarians and pet owners have limited ability to assess pruritic behaviors in dogs. This pilot study assessed the capacity of the Vetrax® triaxial accelerometer to measure these behaviors in six dogs with pruritus likely due to environmental allergens. Dogs wore the activity monitor for two weeks while consuming their usual pet food (baseline), then for eight weeks while consuming a veterinary-exclusive pet food for dogs with suspected non-food-related skin conditions (Hill's Prescription Diet® Derm DefenseTM Canine dry food)...
January 16, 2018: Sensors
https://www.readbyqxmd.com/read/29337874/angular-molecular-electronic-sensor-with-negative-magnetohydrodynamic-feedback
#7
Egor Egorov, Vadim Agafonov, Svetlana Avdyukhina, Sergey Borisov
A high-precision angular accelerometer based on molecular-electronic transfer (MET) technology with a high dynamic range and a low level of self-noise has been developed. Its difference from the analogues is in the use of liquid (electrolyte) as the inertial mass and the use of negative feedback based on the magnetohydrodynamic effect. This article reports on the development of the angular molecular-electronic accelerometer with a magnetohydrodynamic cell for the creation of negative feedback, and the optimization of electronics for the creation of a feedback signal...
January 16, 2018: Sensors
https://www.readbyqxmd.com/read/29334992/the-efficacy-of-a-multimodal-physical-activity-intervention-with-supervised-exercises-health-coaching-and-an-activity-monitor-on-physical-activity-levels-of-patients-with-chronic-nonspecific-low-back-pain-physical-activity-for-back-pain-payback-trial-study
#8
Crystian B Oliveira, Márcia R Franco, Chris G Maher, Anne Tiedemann, Fernanda G Silva, Tatiana M Damato, Michael K Nicholas, Diego G D Christofaro, Rafael Z Pinto
BACKGROUND: Physical activity plays an important role in the management of chronic low back pain (LBP). Engaging in an active lifestyle is associated with a better prognosis. Nevertheless, there is evidence to suggest that patients with chronic LBP are less likely to meet recommended physical activity levels. Furthermore, while exercise therapy has been endorsed by recent clinical practice guidelines, evidence from systematic reviews suggests that its effect on pain and disability are at best moderate and not sustained over time...
January 15, 2018: Trials
https://www.readbyqxmd.com/read/29333996/energy-expenditure-and-intensity-of-active-video-games-in-children-and-adolescents
#9
Karina L R Canabrava, Fernanda R Faria, Jorge R P de Lima, Dartagnan P Guedes, Paulo R S Amorim
PURPOSE: This study aimed to compare the energy expenditure and intensity of active video games to that of treadmill walking in children and adolescents. METHOD: Seventy-two boys and girls (aged 8-13 years) were recruited from local public schools. Energy expenditure and heart rate were measured during rest, during 3-km/hr, 4-km/hr, and 5-km/hr walks, and during active games (Adventure, Boxing I, Boxing II, and Dance). During walking and active games, we also assessed physical activity using an accelerometer...
January 15, 2018: Research Quarterly for Exercise and Sport
https://www.readbyqxmd.com/read/29333530/transparent-flexible-active-faraday-cage-enables-in-vivo-capacitance-measurement-in-assembled-microsensor
#10
Mahdi Ahmadi, Rajesh Rajamani, Serdar Sezen
Capacitive micro-sensors such as accelerometers, gyroscopes and pressure sensors are increasingly used in the modern electronic world. However, the in vivo use of capacitive sensing for measurement of pressure or other variables inside a human body suffers from significant errors due to stray capacitance. This paper proposes a solution consisting of a transparent thin flexible Faraday cage that surrounds the sensor. By supplying the active sensing voltage simultaneously to the deformable electrode of the capacitive sensor and to the Faraday cage, the stray capacitance during in vivo measurements can be largely eliminated...
October 2017: IEEE Sensors Letters
https://www.readbyqxmd.com/read/29332686/no-evidence-for-an-epidemiological-transition-in-sleep-patterns-among-children-a-12-country-study
#11
Taru Manyanga, Joel D Barnes, Mark S Tremblay, Peter T Katzmarzyk, Stephanie T Broyles, Tiago V Barreira, Mikael Fogelholm, Gang Hu, Carol Maher, Jose Maia, Timothy Olds, Olga L Sarmiento, Martyn Standage, Catrine Tudor-Locke, Jean-Philippe Chaput
OBJECTIVE: To examine the relationships between socioeconomic status (SES; household income and parental education) and objectively measured sleep patterns (sleep duration, sleep efficiency, and bedtime) among children from around the world and explore how the relationships differ across country levels of human development. DESIGN: Multinational, cross-sectional study from sites in Australia, Brazil, Canada, China, Colombia, Finland, India, Kenya, Portugal, South Africa, the United Kingdom, and the United States...
February 2018: Sleep Health
https://www.readbyqxmd.com/read/29332685/sleep-patterns-in-children-differ-by-ethnicity-cross-sectional-and-longitudinal-analyses-using-actigraphy
#12
Tevita F W Vaipuna, Sheila M Williams, Victoria L Farmer, Kim A Meredith-Jones, Rosalina Richards, Barbara C Galland, Lisa Te Morenga, Rachael W Taylor
OBJECTIVES: To determine whether sleep patterns (duration, timing, efficiency) differ by ethnicity. DESIGN: Longitudinal study. SETTING: Dunedin, New Zealand. PARTICIPANTS: A total of 939 children (48% male) aged 4-12 years (572 European, 181 Māori, 111 Pacific, 75 Asian). MEASUREMENTS: All measurements were obtained at months 0, 12, and 24. Anthropometry was obtained using standard techniques, and parents completed questionnaires assessing demographics, dietary intake, and television habits of children...
February 2018: Sleep Health
https://www.readbyqxmd.com/read/29332671/estimating-sleep-efficiency-in-10-to-13-year-olds-using-a-waist-worn-accelerometer
#13
M M Borghese, Y Lin, J P Chaput, I Janssen
OBJECTIVE: In field settings, wrist- and waist-worn accelerometers are typically used to assess sleep characteristics and movement behaviors, respectively. There has been a shift in movement behavior studies to wear accelerometers 24 h/d. Sleep characteristics could be assessed in these studies if sleep algorithms were available for waist-worn accelerometers. The objective of this study was to develop and provide validity data for an algorithm/sleep likelihood score cut-off to estimate sleep efficiency in children using the waist-worn Actical accelerometer...
February 2018: Sleep Health
https://www.readbyqxmd.com/read/29327424/the-choreography-of-group-affiliation
#14
Jorina von Zimmermann, Staci Vicary, Matthias Sperling, Guido Orgs, Daniel C Richardson
When two people move in synchrony, they become more social. Yet it is not clear how this effect scales up to larger numbers of people. Does a group need to move in unison to affiliate, in what we term unitary synchrony; or does affiliation arise from distributed coordination, patterns of coupled movements between individual members of a group? We developed choreographic tasks that manipulated movement synchrony without explicitly instructing groups to move in unison. Wrist accelerometers measured group movement dynamics and we applied cross-recurrence analysis to distinguish the temporal features of emergent unitary synchrony (simultaneous movement) and distributed coordination (coupled movement)...
January 12, 2018: Topics in Cognitive Science
https://www.readbyqxmd.com/read/29325794/association-of-posture-and-ambulation-with-function-at-30-days-post-hospital-discharge-in-older-adults-with-heart-failure
#15
Theresa A Floegel, Jared M Dickinson, Cheryl DerAnanian, Marianne McCarthy, Steven P Hooker, Matthew P Buman
PURPOSE: To investigate the predictive value of in-hospital posture and ambulatory activity for 30-d following discharge on functional status in older patients with heart failure. METHODS: Prospective observational pilot study of 27 patients (78 ± 9.8yrs; 51.8% female) admitted with heart failure. Participants wore two inclinometric accelerometers to record posture in-hospital, and an ankle accelerometer to record ambulatory activity in-hospital and 30 days after discharge...
January 8, 2018: Journal of Cardiac Failure
https://www.readbyqxmd.com/read/29325578/effects-of-a-peer-led-walking-in-schools-intervention-the-wish-study-on-physical-activity-levels-of-adolescent-girls-a-cluster-randomised-pilot-study
#16
Angela Carlin, Marie H Murphy, Alan Nevill, Alison M Gallagher
BACKGROUND: School-based interventions may be effective at increasing levels of physical activity (PA) among adolescents; however, there is a paucity of evidence on whether walking can be successfully promoted to increase PA in this age group. This pilot study aimed to assess the effects of a 12-week school-based peer-led brisk walking programme on levels of school-time PA post intervention. METHODS: Female participants, aged 11-13 years, were recruited from six post-primary schools in Northern Ireland...
January 11, 2018: Trials
https://www.readbyqxmd.com/read/29324700/predicting-lameness-in-sheep-activity-using-tri-axial-acceleration-signals
#17
Jamie Barwick, David Lamb, Robin Dobos, Derek Schneider, Mitchell Welch, Mark Trotter
Lameness is a clinical symptom associated with a number of sheep diseases around the world, having adverse effects on weight gain, fertility, and lamb birth weight, and increasing the risk of secondary diseases. Current methods to identify lame animals rely on labour intensive visual inspection. The aim of this current study was to determine the ability of a collar, leg, and ear attached tri-axial accelerometer to discriminate between sound and lame gait movement in sheep. Data were separated into 10 s mutually exclusive behaviour epochs and subjected to Quadratic Discriminant Analysis (QDA)...
January 11, 2018: Animals: An Open Access Journal From MDPI
https://www.readbyqxmd.com/read/29324571/physical-activity-patterns-and-sedentary-behavior-in-older-women-with-urinary-incontinence-an-accelerometer-based-study
#18
Christine M Chu, Kavita D Khanijow, Kathryn H Schmitz, Diane K Newman, Lily A Arya, Heidi S Harvie
PURPOSE: Objective physical activity data for women with urinary incontinence are lacking. We investigated the relationship between physical activity, sedentary behavior, and the severity of urinary symptoms in older community-dwelling women with urinary incontinence using accelerometers. MATERIALS AND METHODS: This is a secondary analysis of a study that measured physical activity (step count, moderate-to-vigorous physical activity time) and sedentary behavior (percentage of sedentary time, number of sedentary bouts per day) using a triaxial accelerometer in older community-dwelling adult women not actively seeking treatment of their urinary symptoms...
January 10, 2018: Female Pelvic Medicine & Reconstructive Surgery
https://www.readbyqxmd.com/read/29324298/calibration-of-raw-accelerometer-data-to-measure-physical-activity-a-systematic-review
#19
REVIEW
Márcio de Almeida Mendes, Inácio C M da Silva, Virgílio V Ramires, Felipe F Reichert, Rafaela C Martins, Elaine Tomasi
Most of calibration studies based on accelerometry were developed using count-based analyses. In contrast, calibration studies based on raw acceleration signals are relatively recent and their evidences are incipient. The aim of the current study was to systematically review the literature in order to summarize methodological characteristics and results from raw data calibration studies. The review was conducted up to May 2017 using four databases: PubMed, Scopus, SPORTDiscus and Web of Science. Methodological quality of the included studies was evaluated using the Landis and Koch's guidelines...
December 30, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29320919/does-school-physical-education-really-contribute-to-accelerometer-measured-daily-physical-activity-and-non-sedentary-behaviour-in-high-school-students
#20
Daniel Mayorga-Vega, Alejandro Martínez-Baena, Jesús Viciana
Physical education has been highlighted as an important environment for physical activity promotion, however, to our knowledge there are no previous studies examining the contribution of physical education to daily accelerometer-measured physical activity and non sedentary behaviour. The purpose was to compare the accelerometer-measured physical activity and sedentary behaviour between physical education, non-physical education and weekend days in adolescents. Of the 394 students from a Spanish high school that were invited to participate, 158 students (83 boys and 75 girls) aged 13-16 years were analyzed (wear time ≥ 600 min)...
January 11, 2018: Journal of Sports Sciences
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