Search results for "mittaus"

Monitoring peatland water table depth with optical and radar satellite imagery

2022

Peatland water table depth (WTD) and wetness have widely been monitored with optical and synthetic aperture radar (SAR) remote sensing but there is a lack of studies that have used multi-sensor data, i.e., combination of optical and SAR data. We assessed how well WTD can be monitored with remote sensing data, whether multi-sensor approach boosts explanatory capacity and whether there are differences in regression performance between data and peatland types. Our data consisted of continuous multiannual WTD data from altogether 50 restored and undrained Finnish peatlands, and optical (Landsat 5–8, Sentinel-2) and Sentinel-1 C-band SAR data processed in Google Earth Engine. We calculated rando…

Item response theory and differential test functioning analysis of the HBSC-Symptom-Checklist across 46 countries

2022

Abstract Background The Symptom Checklist (SCL) developed by the Health Behaviour in School-aged Children (HBSC) study is a non-clinical measure of psychosomatic complaints (e.g., headache and feeling low) that has been used in numerous studies. Several studies have investigated the psychometric characteristics of this scale; however, some psychometric properties remain unclear, among them especially a) dimensionality, b) adequacy of the Graded Response Model (GRM), and c) measurement invariance across countries. Methods Data from 229,906 adolescents aged 11, 13 and 15 from 46 countries that participated in the 2018 HBSC survey were analyzed. Adolescents were selected using representative s…

Cross‐national validation of the Social Media Disorder‐scale : Findings from adolescents from 44 countries

2022

Background and aims There is currently no cross-national validation of a scale that measures problematic social media use (SMU). The present study investigated and compared the psychometric properties of the Social Media Disorder (SMD)-scale among young adolescents from different countries. Design Validation study. Setting and participants Data came from 222,532 adolescents from 44 countries participating in the Health Behaviour in School-aged Children (HBSC) survey (2017/2018). The HBSC survey was conducted in the European region and Canada. Participants were on average 13.5 years old (SD = 1.6) and 51.2% were girls. Measurement Problematic SMU was measured using the 9-item SMD-scale with …

Liikkujien määrän mittaamisessa tarvitaan monia menetelmiä

2023

Liikuntatieteen ja maantieteen osaamista yhdistäneestä Yhdenvertainen liikunnallinen lähiö (YLLI) -hankkeessa kertyi tietoa Helsingin Kontulan ja Jyväskylän Huhtasuon liikuntapaikkojen käytöstä ja käyttäjistä. Samalla karttui kokemuksia eri mittausmenetelmistä. Käyttöä on niin laskureille, havainnoinnille, somedatalle kuin kyselyille. nonPeerReviewed

Kehollisuuden merkitys suomalaisjuoksijoiden teknologian ei-käytölle

2022

Meter for the Quantitative Analysis of Newspaper Sport Material

2016

This article presents a meter for the quantitative analysis of newspaper sport material. The meter makes it possible to measure and classify newspaper sport material in detail. The meter has three levels. The selected level depends on the research purpose and desired measurement accuracy. Measurement can focus on a certain level, or all levels can be used together. Individual variables can also be utilized at a certain level. The three levels with respective level units of observation are: 1) articles, photos, and graphics; 2) sets of articles; and 3) sets of data materials. The use of each level is presented in the article. The article also contains a summary of the newspaper sport materia…

A New Fitness Test of Estimating VO2max in Well-Trained Rowing Athletes

2021

BackgroundThis study was designed to investigate the validity of maximal oxygen consumption (VO2max) estimation through the Firstbeat fitness test (FFT) method when using submaximal rowing and running programs for well-trained athletes.MethodsWell-trained flatwater rowers (n = 45, 19.8 ± 3.0 years, 184 ± 8.7 cm, 76 ± 12.9 kg, and 58.7 ± 6.0 mL⋅kg–1⋅min–1) and paddlers (n = 45, 19.0 ± 2.5 years, 180 ± 7.7 cm, 74 ± 9.4 kg, and 59.9 ± 4.8 mL⋅kg–1⋅min–1) completed the FFT and maximal graded exercise test (GXT) programs of rowing and running, respectively. The estimated VO2max was calculated using the FFT system, and the measured VO2max was obtained from the GXT programs. Differences between the…

Mikrokokoistetut leviämisvastus- ja nelipisteanturimittaukset puolijohderakenteen varauksenkuljettajien syvyysjakaumien määrittämisessä

2013

Entistä pienemmät puolijohderakenteet vaativat analyysityökaluilta erittäin hyvää herkkyyttä, jonka on myös kehityttävä rakenteiden vaatimusten mukaisesti -- muussa tapauksessa kehitys voi hidastua hyvin paljon ilman kunnollista tietoa valmistusmenetelmien tuloksista. Yksi oleellinen osa rakenteiden analysoimisessa on tieto seostusatomien ja varauksenkuljettajien pitoisuuksista rakenteen syvyyssuunnassa, eli syvyysjakauma. Vuosikymmeniä syvyysjakauman mittaukseen on käytetty leviämisvastusmittausta (SRP, engl. Spreading Resistance Profiling), ja nelipisteanturimittausta (4PP, engl. Four Point Probe) on käytetty kuvaamaan koko syvyysjakauman vaikutusta sähköisessä kontaktissa. Molempien tekn…

Validity of Hip-worn Inertial Measurement Unit Compared to Jump Mat for Jump Height Measurement in Adolescents

2018

Jump tests assess lower body power production capacity, and can be used to evaluate athletic ability and development during growth. Wearable inertial measurement units (IMU) seem to offer a feasible alternative to laboratory-based equipment for jump height assessments. Concurrent validity of these devices for jump height assessments has only been established in adults. Therefore, the purpose of this study was to evaluate the concurrent validity of IMU-based jump height estimate compared to contact mat-based jump height estimate in adolescents. Ninety-five adolescents (10-13 years-of-age; girls N = 41, height = 154 (SD 9) cm, weight = 44 (11) kg; boys N = 54, height = 156 (10) cm, weight = 4…

School-Age Children's Actual Motor Competence and Perceived Physical Competence: A 3-Yr Follow-up.

2022

Purpose This study examined school-aged children’s actual motor competence (MC) and perceived physical competence (PC) over three years along with the covariate effects of gender and body mass index (BMI). Methods Participants were 1 121 (girls 573, boys 548) children (Mage 11.26 ± .32) from 35 randomly selected public schools across Finland. MC was assessed using three movement tests targeting locomotor, stability, and object control skills, and PC was assessed using the sport competence subscale of the Physical Self-Perception Profile via four-phase monitoring. Results MC and PC remained stable over time. Of the three variables, locomotor skills showed the strongest association with PC. L…