Search results for "ongelma"
showing 10 items of 549 documents
Inverse problems for $p$-Laplace type equations under monotonicity assumptions
2016
We consider inverse problems for $p$-Laplace type equations under monotonicity assumptions. In two dimensions, we show that any two conductivities satisfying $\sigma_1 \geq \sigma_2$ and having the same nonlinear Dirichlet-to-Neumann map must be identical. The proof is based on a monotonicity inequality and the unique continuation principle for $p$-Laplace type equations. In higher dimensions, where unique continuation is not known, we obtain a similar result for conductivities close to constant.
DESDEO : An Open Framework for Interactive Multiobjective Optimization
2018
We introduce a framework for interactive multiobjective optimization methods called DESDEO released under an open source license. With the framework, we want to make interactive methods easily accessible to be applied in solving real-world problems. The framework follows an object-oriented software design paradigm, where functionalities have been divided to modular, self-contained components. The framework contains implementations of some interactive methods, but also components which can be utilized to implement more interactive methods and, thus, increase the applicability of the framework. To demonstrate how the framework can be used, we consider an example problem where the pollution of…
Constructing Nonagency at the Beginning of Psychotherapy : The 10DT model
2018
This study examined how nine clients discursively constructed non-agency in their first session of individual psychotherapy. With open reading and linguistic analysis of the transcribed first sessions, combined with theory-based considerations, we created a model of discursive means for ascribing agentic and non-agentic positions, the 10 Discursive Tools model (10DT). There was large variability in how the tools functioned to create the impression of problematic agency, and the clients could not be classified according to their tool use patterns. The study shows the potential of the 10DT model for the detailed examination of presentations of “not-being-able” produced by psychotherapy client…
Kokkeja, kajuuttavahteja ja oppilaita : miehistön nuorimmat jäsenet oululaisilla ja raahelaisilla purjealuksilla 1850 - 1860 -luvuilla
2012
Pro gradun tarkoituksena on selvittää oululaisten ja raahelaisten kauppa-alusten miehistön nuorimpien jäsenten merille lähtöä ja urakehitystä ensimmäisen viiden vuoden aikana. Työn tavoitteena on selvittää, minkä ikäisiä olivat nuoret merimiehet, millaiset sosiaaliset lähtökohdat heillä oli, miksi he pestautuivat, millaista elämä oli laivalla ja miten heidän uransa kehittyi jatkossa. Tarkastelu kohdistuu viiden vuoden jaksolle vuosina 1858-1863 ja mahdollisuuksien mukaan joidenkin miesten uraa on seurattu pidemmälti. Tutkimus edustaa kollektiivibiografista ja mikrohistoriallista tutkimusotetta. Tutkittavasta joukosta, 75 nuoresta miehestä, on luotu tietokantoja, joiden avulla selvitetään, m…
Mental Health Status of Healthcare Workers During the COVID-19 Outbreak
2021
Background: The COVID-19 pandemic is a massive health crisis that has exerted enormous physical and psychological pressure. Mental healthcare for healthcare workers (HCWs) should receive serious consideration. This study served to determine the mental-health outcomes of 1,556 HCWs from 45 countries who participated in the COVID-19 IMPACT project, and to examine the predictors of the outcomes during the first pandemic wave. Methods: Outcomes assessed were self-reported perceived stress, depression symptom, and sleep changes. The predictors examined included sociodemographic factors and perceived social support. Results: The results demonstrated that half of the HCWs had moderate levels of pe…
Gambling and gaming during COVID-19 : The role of mental health and social motives in gambling and gaming problems
2022
Background: The uncertain and stressful global situation caused by the COVID-19 pandemic has the potential to cause anxiety and impact people's mental health. Simultaneously, social distancing policies have isolated people from their normal social interactions. These societal changes have inevitably influenced gambling and gaming practices, and many people may have turned to betting or gaming as a means of social exchange. This study examined the influence of COVID-19 anxiety on increased mental health problems and their relationship to gambling and gaming problems. The mediating role of social motives for gambling and gaming was also investigated. Material and methods: Finnish adults (N = …
Problematic Social Media Use and Health among Adolescents
2021
1) Background: The use of social media has become an integral part of adolescents’ daily lives. However, the intensive use of social media can develop into a health-threatening addiction, but unfavourable health consequences can occur even with less use. Social media user groups categorized as no-risk, moderate risk (of developing problematic behaviour), and problematic use were examined with reference to their prevalence, their associations with individual determinants and health, and the increased health risk between groups. (2) Methods: The Finnish nationally representative HBSC data (persons aged 11, 13, and 15, n = 3408) and descriptive and binary logistic regression analysis were appl…
Follow-Up Data Improve the Estimation of the Prevalence of Heavy Alcohol Consumption.
2018
Aims. We aim to adjust for potential non-participation bias in the prevalence of heavy alcohol consumption. Methods. Population survey data from Finnish health examination surveys conducted in 1987–2007 were linked to the administrative registers for mortality and morbidity follow-up until end of 2014. Utilising these data, available for both participants and non-participants, we model the association between heavy alcohol consumption and alcohol-related disease diagnoses. Results. Our results show that the estimated prevalence of heavy alcohol consumption is on average of 1.5 times higher for men and 1.8 times higher for women than what was obtained from participants only (complete case an…
The associations of indoor environment and psychosocial factors on the subjective evaluation of Indoor Air Quality among lower secondary school stude…
2017
Subjective evaluation of Indoor Air Quality (subjective IAQ) reflects both building-related and psychosocial factors, but their associations have rarely been studied other than on the individual level in occupational settings and their interactions have not been assessed. Therefore, we studied whether schools' observed indoor air problems and psychosocial factors are associated with subjective IAQ and their potential interactions. The analysis was performed with a nationwide sample (N = 195 schools/26946 students) using multilevel modeling. Two datasets were merged: (i) survey data from students, including information on schools' psychosocial environment and subjective IAQ, and (ii) data fr…
Relationship Between Accelerometer-Based Physical Activity, Sedentary Behavior, and Mental Health in Young Finnish Men
2022
Healthy lifestyle behaviors including physical activity (PA) have been recognized to contribute positively to mental health. Most of the evidence on relationship between PA and mental health relies on self-reported PA results. Device-based measures on PA or sedentary behavior (SB) are less frequently used in mental health research. The present study aimed at examining the relationship between mental health and PA/SB measured by accelerometers in young Finnish men. The sample consisted of 409 men (mean age 28 ± 7 years), who participated in the military refresher training in Finland. Self-rated mental health was measured with Mental Health Inventory (MHI-5) and short Warwick-Edinburgh Mental…