Search results for "luotettavuus"

On stochastic modelling and reliability of systems with moving cracked material

2015

In many industrial processes, such as printing paper, a material travels through a series of rollers unsupported and under longitudinal tension. The value of the tension has an important role in the system behaviour, such as fracture and me- chanical stability. This thesis develops stochastic models for a system in which an elastic, isotropic cracked material travels through a series of spans and studies the probabilities of fracture and instability of the material. The models focus on describing tension variations and initial cracks in the material. Time-dependent tension fluctuations are modelled by the stationary Ornstein-Uhlenbeck process, and the occurrence and lengths of the cracks are…

Promoting sixth graders’ credibility evaluation of Web pages: An intervention study

2020

Abstract This study investigated whether a teacher-led intervention program on online inquiry improved sixth graders' performance in a credibility evaluation task. Students (N = 342) were divided into two conditions, an intervention group (190 students) and a control group (152 students). The intervention program (21 × 45 min lessons) was implemented during a six-week course as a part of normal schoolwork. The program included explicit teaching of online inquiry skills: searching for information (3 lessons), evaluating credibility of information (3 lessons), and synthesizing information (3 lessons). In addition, the skills taught were applied in two online inquiry projects comprising 12 les…

Sourcing practices in online journalism : an ethnographic study of the formation of trust in and the use of journalistic sources

2017

Arguably one of the most important factors of journalistic quality is careful source selection. Studies on online journalism have revealed working conditions which may lead to poor sourcing practices. This article seeks to answer the following questions: What sources do online journalists use, and how do they rationalize their sourcing practices? A total of 17 Finnish online journalists in 7 newsrooms were observed and interviewed over their practices of source searching, evaluation, and use. The study revealed five distinctive rationales of source use, which I call trust discourses: the ideological, the pragmatic, the cynically pragmatic, the consensual, and the contextual trust. Different…

Validity and Reliability of the Finnish Version of the Locomotor Capabilities Index-5 in Patients Fitted with a Prosthesis after Major Lower Extremit…

2019

Subjective Well-Being in Sports Coaches

2022

<p>The purpose of the study is to analyze the structure of the psychological determinants of subjective well-being and identify the most significant set of determinants that form the resources of the psychological well-being in sports coaches. This parameter is important due to objective conditions, which significantly increases stress and reduces the quality of life of subjects of professional sport. The participants were 200 professional sports coaches (89 women, 111 men), M<sub>age</sub>=39 years, M<sub>exprience</sub>=12 years. The psychological determinants were measured with the Brief Differential Perfectionism Inventory (Zolotareva et al, 2021), the Gene…

Kevyen harjoittelun vaikuttavuustutkimuksen mittausmenetelmien luotettavuus

2000

Hyvinvoinnin mittaaminen edellyttää valintoja : näkökulmana julkishallinnollinen tiedon tarve

2021

Dependability aspects in the development and provision of location-based services

2006

Mobiiliverkkokaupalle on ennustettu suurta tulevaisuutta. Paikkaperusteisia palveluja pidetään yhtenä mobiiliverkkokaupan lupaavimpana alueena. Kyseessä ovat sellaiset lisäarvopalvelut matkapuhelinten käyttäjille, jotka hyödyntävät tietoa siitä, missä käyttäjä tällä hetkellä on. Palvelusta voi saada tiedon esimerkiksi lähimmästä ravintolasta, hotellista, apteekista tai huoltamosta ja sen sijainnista, tai esimerkiksi kartan puhelimeensa.Vuonna 2001 tehtyjen ennusteiden mukaan vuoden 2004 lopussa paikkaperusteisilla palveluilla piti olla jo 300 miljoonaa käyttäjää koko maailmassa. Tällaisiin lukuihin ei ole päästy edes nyt, vuonna 2006. Odotuksien ja todellisuuden välinen ero on suuri. Suomes…

DEPS-testin luotettavuus ja pätevyys aikuisilla selkäpotilailla

2017

The Depression Scale (DEPS) is a patient-reported outcome instrument developed to recognize depressive symptoms. This study measured the psychometric properties of the DEPS among patients with degenerative spinal disease. Altogether 637 patients were included in the analysis. Main research question was whether the DEPS would meet pertinent psychometric criteria for reliability and validity. The results of analyses supported the DEPS instrument as a reliable and valid test to measure depressive symptoms among adult patients with spinal disease fulfilling the psychometric criteria. nonPeerReviewed

Reliability and Sensitivity of Nocturnal Heart Rate and Heart-Rate Variability in Monitoring Individual Responses to Training Load

2022

Purpose: To assess the reliability of nocturnal heart rate (HR) and HR variability (HRV) and to analyze the sensitivity of these markers to maximal endurance exercise. Methods: Recreational runners recorded nocturnal HR and HRV on nights after 2 identical low-intensity training sessions (n = 15) and on nights before and after a 3000-m running test (n = 23). Average HR, the natural logarithm of the root mean square of successive differences (LnRMSSD), and the natural logarithm of the high-frequency power (LnHF) were analyzed from a full night (FULL), a 4-hour (4H) segment starting 30 minutes after going to sleep, and morning value (MOR) based on the endpoint of the linear fit through all 5-m…