Search results for "mittaus"
showing 10 items of 266 documents
Automaattisen vedenlaadun seurantajärjestelmän luotettavuus ja toimivuus Kyrönjoella
2009
A Novel Instrument to Measure the Multidimensional Structure of Professional Agency
2018
This study aimed to construct and validate a quantitative measurement instrument to determine the structure of professional agency in working life. Empirical data (N = 589) were collected via a web-based, theoretically informed questionnaire, within the professional domains of education, healthcare, rescue services, and information technology. The questionnaire items incorporated theoretically based dimensions of professional agency. The structure of professional agency was initially analysed via exploratory factor analysis. Thereafter, using exploratory structural equation modelling, the structure of professional agency was investigated with a view to confirmation and validation. The resul…
Lasten ja nuorten kestävyyskunto
2018
Kestävyyskunto on yksi tutkituimmista terveyteen ja suorituskykyyn yhdistetyistä fyysisen kunnon osa-alueista lapsilla ja nuorilla. Kestävyyskunnon mittaamiseen, sitä koskevien mittaustulosten tulkintaan, kestävyyskunnon harjoitettavuuteen sekä kestävyyskunnon terveysvaikutusten tutkimiseen lapsilla ja nuorilla liittyy yhä haasteita. nonPeerReviewed
Three different approaches to cognitive fatigue in patients with a mild form of multiple sclerosis : objective cognitive, subjective cognitive and ne…
2017
Tämän tutkimuksen tarkoitus oli arvioida kognitiivista uupumusta lievää multippeli skleroosin (MS) muotoa sairastavilla potilailla kolmea eri lähestymistapaa käyttäen: objektiivista kognitiivista, subjektiivista kognitiivista ja neurofysiologista. Objektiivista kognitiivista uupumusta arvioitiin tarkkaavuuden ylläpitoa, reaktionopeutta ja työmuistia mittaavilla tehtävillä. Subjektiivista kognitiivista uupumusta sekä elämänlaatua arvioitiin itsearvioilla. Neurofysiologiset mittaukset käsittivät aivojen sähköiin herätevasteisiin perustuvia observaatioita. Mittareina olivat kontingentti negatiivinen variaatio (CNV) ja P3. Tutkimukseen osallistui 20 MS-tautia sairastavaa ja 20 verrallistettua t…
Startup Metrics That Tech Entrepreneurs Need to Know
2020
Metrics can be used by firms to make more objective decisions based on data. Software startups in particular are characterized by the uncertain or even chaotic nature of the contexts in which they operate. Using data in the form of metrics can help software startups to make the right decisions amid uncertainty and limited resources. However, whereas conventional business metrics and software metrics have been studied in the past, metrics in the specific context of software startups have not been studied. In this chapter, we present the results of a multivocal literature review to offer you 118 metrics practitioner experts think software startups should measure. These metrics can give you id…
Dog behaviour classification with movement sensors placed on the harness and the collar
2021
Dog owners’ understanding of the daily behaviour of their dogs may be enhanced by movement measurements that can detect repeatable dog behaviour, such as levels of daily activity and rest as well as their changes. The aim of this study was to evaluate the performance of supervised machine learning methods utilising accelerometer and gyroscope data provided by wearable movement sensors in classification of seven typical dog activities in a semi-controlled test situation. Forty-five middle to large sized dogs participated in the study. Two sensor devices were attached to each dog, one on the back of the dog in a harness and one on the neck collar. Altogether 54 features were extracted from th…
Development of accelerometer-based light to vigorous physical activity in fitness profiles of school-aged children.
2021
This study examined the developmental trajectories of light (LPA) and moderate-to-vigorous physical activity (MVPA) in fitness profiles derived from motor competence, perceived motor competence, health-related fitness, and MVPA behaviour. Locomotor, stability, and object-control skills, muscular and cardiovascular fitness, and physical activity were assessed in 510 (girls 285, boys 225) Finnish school-aged children (Mage = 11.26 ± .33 years) over three years. Physical activity was measured using hip-mounted accelerometers. Fitness profiles were identified using latent profile analysis and the development of physical activity levels across four assessments was analysed with latent growth cur…
Physiological loading during normal daily life and exercise assessed with electromyography
2014
Comparison of acceleration and EMG signals in quantifying physical activity
2012
Fyysisen aktiivisuuden puute on muodostumassa kasvavaksi ongelmaksi maailmanlaajuisesti. WHO:n mukaan yli 15 vuotiaista noin 31% eivät liikkuneet terveytensä kannalta tarpeeksi vuonna 2008. Liikkumattomuus on luokiteltu neljänneksi suurimmaksi riskitekijäksi yleiseen kuolleisuuteen maailman laajuisesti. Näin ollen uudenlaista teknologiaa kehitetään fyysisen aktiivisuuden mittaamiseen, jotta ennaltaehkäisevää työtä voidaan tehdä. Tutkimuksen tarkoituksena oli verrata älyvaatteella mitatun EMG signaalin piirteitä kolmiulotteiseen kiihtyvyyssignaaliin. Älyvaate mittaa quadriceps femoriksen ja hamstring lihasten EMG aktiivisuuta. 12 koehenkilön kahdestakymmenestä mittauksesta koostuva aineisto …
Responsiveness of Electromyographically Assessed Skeletal Muscle Inactivity – methodological exploration and implications for health benefits
2022
Abstract Prolonged sedentary behaviour is detrimental to health due to low contractile activity in large lower extremity muscle groups. This muscle inactivity can be measured with electromyography (EMG), but it is unknown how methodological factors affect responsiveness longitudinally. This study aimed to rank 16 different EMG inactivity thresholds based on their responsiveness (absolute and standardized effect size, responsiveness) using data from a randomized controlled trial targeted at reducing and breaking up sedentary time (InPact, ISRCTN28668090). EMG inactivity duration and usual EMG inactivity bout duration (weighted median of bout lengths) were measured from large lower extremity …