Search results for "tavu"
showing 10 items of 710 documents
Comparison of machine learning and logistic regression as predictive models for adverse maternal and neonatal outcomes of preeclampsia: A retrospecti…
2022
IntroductionPreeclampsia, one of the leading causes of maternal and fetal morbidity and mortality, demands accurate predictive models for the lack of effective treatment. Predictive models based on machine learning algorithms demonstrate promising potential, while there is a controversial discussion about whether machine learning methods should be recommended preferably, compared to traditional statistical models.MethodsWe employed both logistic regression and six machine learning methods as binary predictive models for a dataset containing 733 women diagnosed with preeclampsia. Participants were grouped by four different pregnancy outcomes. After the imputation of missing values, statistic…
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…
Työpaikkaliikunnan muutos ja kehittäminen : Maavoimien Materiaalilaitoksen Esikunta
2009
Adolescents with poorly controlled type 1 diabetes : psychological flexibility is associated with the glycemic control, quality of life and depressiv…
2021
This study investigates the role of psychological flexibility in relation to glycaemic control (HbA1c) and quality of life among adolescents with poorly-controlled diabetes. Adolescents (n = 65, aged 12–16 years) completed the Children and Adolescents Mindfulness Measure (CAMM), the Diabetes Acceptance and Action Scale for Children and Adolescents (DAAS), the Depression Scale (RBDI), and the Health-Related Quality of Life Scale (KINDL-R). HbA1c values were collected from medical records. A higher level of psychological flexibility was associated with better glycaemic control, better quality of life, and lower levels of depressive and anxiety symptoms. Mediation analysis showed that diabetes…
Liikunta voi toimia hoitona lievissä ja keskivaikeissa masennusoireissa
2022
ACTing for depressive symptoms : a longitudinal study of a brief 4-session acceptance- and value-based intervention for symptoms of depression
2018
The main objective of this study was to investigate a brief 4-session intervention based on a theoretical framework of acceptance and commitment therapy (ACT), and to explore its short- and long-term effectiveness among individuals reporting depressive symptoms. Additionally, the research aimed at further exploring the elements of psychological flexibility and mindfulness associated with improvements in depressive symptoms. The dissertation comprises three studies. Study I investigated the effectiveness of the brief intervention compared to a waiting-list control group. In total, 57 participants were randomized into either the ACT intervention (n = 28) or the waiting-list control (WLC; n = …
Temperament and symptoms of stress and depression among adolescents: The mediating role of psychological flexibility
2023
Abstract Background Early appearing temperamental differences and the psychological flexibility skills of individuals are proposed factors influencing stress and depression among adolescents. We test the theoretical assumption that temperament may form a basis for facing the outer world, while the development of psychological flexibility being another such basis and a mediator in well-being outcomes. Methods Using data on 740 adolescents (Mage = 15.7 years, 57% female) assessed at the beginning and end of the final grade of basic education, structural equation modeling (SEM) with mediation analysis was conducted to examine the associations between the key temperament dimensions, changes in …
Masennuksen pariterapian vaikuttavuuden erot tutkimusyksiköiden välillä ja niitä välittävät tekijät
2013
Tutkimuksen tarkoituksena oli selvittää masennuksen pariterapian vaikuttavuuden eroja tutkimusyksiköiden välillä ja niitä välittäviä tekijöitä. Näitä tavoitteita varten tutkittiin myös, onko pariterapia vaikuttavaa masennuksen hoidossa. Tutkimusyksiköiden välisiä eroja pariterapian tuloksellisuudessa on tutkittu vain vähän. Lisäksi tekijöitä, jotka välittävät tutkimusyksiköiden välisiä eroja masennuksen pariterapian tuloksellisuudessa ei ole ilmeisesti tutkittu. Kuitenkin masennuksen pariterapian tuloksellisuutta on tutkittu ja sen on todettu olevan tuloksellista (Kung, 2000). Tässä tutkimuksessa tarkasteltiin Länsi-Pohjan ja Pohjois-Savon tutkimusyksiköiden välisiä eroja masennuksen hoidon…
Preconcentration and speciation analysis of mercury : 3D printed metal scavenger-based solid-phase extraction followed by analysis with inductively c…
2021
A selective method for preconcentration and determination of methylmercury (MeHg) and inorganic mercury (iHg) in natural water samples at the ng L−1 level has been developed. The method involves adsorption of Hg species into a 3D printed metal scavenger and sequential elution with acidic thiourea solutions before ICP-MS determination. Experimental parameters affecting the preconcentration of MeHg and iHg such as the sample matrix, effect of the flow rate on adsorption, eluent composition, and elution mode have been studied in detail. The obtained method detection limits, considering the preconcentration factors of 42 and 93, were found to be 0.05 ng L−1 and 0.08 ng L−1 for MeHg and iHg, res…
Enablers and Constraints of STEM Programme Implementation: an External Change Agent Perspective from a National STEM Programme in Finland
2021
AbstractAn international need exists for effective programmes that will enhance learners’ interest in studies and careers related to science, technology, engineering and mathematics, i.e. STEM. When considering the impact of STEM programmes, it is important to identify what can enable or constrain effective programme implementation. As such, enablers can be systematically supported and constraints tackled to maximise a programme’s impact. This study considers a nationwide STEM programme in Finland that involved 450 teachers and their learning communities. The study followed an interpretative paradigm, collecting data through semi-structured interviews and analysed with data-driven thematic …