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- Alaie, Iman, et al.
(författare)
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Uppsala Longitudinal Adolescent Depression Study (ULADS)
- 2019
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Ingår i: BMJ Open. - : BMJ Publishing Group Ltd. - 2044-6055. ; 9:3
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Tidskriftsartikel (refereegranskat)abstract
- Purpose: To present the Uppsala Longitudinal Adolescent Depression Study, initiated in Uppsala, Sweden, in the early 1990s. The initial aim of this epidemiological investigation was to study the prevalence, characteristics and correlates of adolescent depression, and has subsequently expanded to include a broad range of social, economic and health-related long-term outcomes and cost-of-illness analyses.Participants: The source population was first-year students (aged 16-17) in upper-secondary schools in Uppsala during 1991-1992, of which 2300 (93%) were screened for depression. Adolescents with positive screening and sex/age-matched peers were invited to a comprehensive assessment. A total of 631 adolescents (78% females) completed this assessment, and 409 subsequently completed a 15year follow-up assessment. At both occasions, extensive information was collected on mental disorders, personality and psychosocial situation. Detailed social, economic and health-related data from 1993 onwards have recently been obtained from the Swedish national registries for 576 of the original participants and an age-matched reference population (N=200 000).Findings to date: The adolescent lifetime prevalence of a major depressive episode was estimated to be 11.4%. Recurrence in young adulthood was reported by the majority, with a particularly poor prognosis for those with a persistent depressive disorder or multiple somatic symptoms. Adolescent depression was also associated with an increased risk of other adversities in adulthood, including additional mental health conditions, low educational attainment and problems related to intimate relationships.Future plans: Longitudinal studies of adolescent depression are rare and must be responsibly managed and utilised. We therefore intend to follow the cohort continuously by means of registries. Currently, the participants are approaching mid-adulthood. At this stage, we are focusing on the overall long-term burden of adolescent depression. For this purpose, the research group has incorporated expertise in health economics. We would also welcome extended collaboration with researchers managing similar datasets.
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| 2. |
- Jonsson Widén, Anna, 1967-
(författare)
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Bildundervisning i möte med samtidskonst : bildlärares professionella utveckling i olika skolformer
- 2016
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The aim of this thesis is to describe and review the visual art teaching profession from a wider cultural perspective. This can lead to a better understanding of how teachers in 2000s Sweden manage change and relate to their task. This is a starting point for the formation of question areas that are of concern: the importance of their own specific interests in various visual art media for the development of their professional knowledge; what conditions different types of schools provide for the development of the subject and the strategies visual art teachers (in the study) use to develop their teaching on the theme of contemporary art. The theoretical framework is based on a socio-cultural perspective. Analysis combine cultural semiotic and frame factor models. Institutional art theory focuses on art’s audience and the art institutions which are central to contemporary art manifestations. The thesis is based on two case studies conducted by three separate teacher-training days at Bildmuseet in Umeå. 14 Visual Art teachers from four different types of schools: compulsory school, years 7-9, upper secondary school, folk high school and volountary art school (Swe. kulturskola) participated in the study. The investigations has generated data produced through interviews, observation, self-reports and images. Contemporary Art is involved in society's constant change and mix of new medias. The changes concernes the visual art educational field. The opportunities different school contexts provides for education, has an impact on how knowledge is transformed. Conformity, solid structures, formes of assessment and low legitimacy shape resistance. Teaching in visual art is highly based on teachers' own choices. A fragmented knowledge-culture with focus on manual or digital mediations leads to different knowledge-selection. This study highlights resistances that affect applying contemporary art on its own terms. Contemporary art’s starting points and new perspectives represent other paradigms than traditional art classifications. This sigifies tension between the artworld and the educational field. To reducie the tension, a dialogue and interaction between the fields on equal terms is recommended. The study identifies a lack of procedures and resources for formal continuing professional development. There is a need of developing the collective body of knowledge, covering both the theoretical and practical knowledge in the visual art teacher culture.
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| 3. |
- Jonsson, Patrik, 1968-
(författare)
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Surface Status Classification, Utilizing Image Sensor Technology and Computer Models
- 2015
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- There is a great need to develop systems that can continuously provide correct information about road surface status depending on the prevailing weather conditions. This will minimize accidents and optimize transportation. In this thesis different methods for the determination of the road surface status have been studied and analyzed, and suggestions of new technology are proposed. Information about the road surface status is obtained traditionally from various sensors mounted directly in the road surface. This information must then be analyzed to create automated warning systems for road users and road maintenance personnel. The purpose of this thesis is to investigate how existing technologies can be used to obtain a more accurate description of the current road conditions. Another purpose is also to investigate how existing technologies can be used to obtain a more accurate description of the current road conditions. Furthermore, the aim is to develop non-contact technologies able to determine and classify road conditions over a larger area, since there is no system available today that can identify differences in road surface status in the wheel tracks and between the wheel tracks.Literature studies have been carried out to find the latest state of the art research and technology, and the research work is mainly based on empirical studies. A large part of the research has involved planning and setting up laboratory experiments to test and verify hypotheses that have emerged from the literature studies. Initially a few traditional road-mounted sensors were analyzed regarding their ability to determine the road conditions and the impact on their measured values when the sensors were exposed to contamination agents such as glycol and oil. Furthermore, non-contact methods for determining the status of the road surface have been studied. Images from cameras working in the visible range, together data from the Swedish Transportation Administration road weather stations, have been used to develop computerized road status classification models that can distinguish between a dry, wet, icy and snowy surface. Field observations have also been performed to get the ground truth for developing these models. In order to improve the ability to accurately distinguish between different surface statuses, measurement systems involving sensors working in the Near-Infrared (NIR) range have been utilized. In this thesis a new imaging method for determining road conditions with NIR camera technology is developed and described. This method was tested in a field study performed during the winter 2013-2014 with successful results.The results show that some traditional sensors could be used even with future user-friendly de-icing chemicals. The findings from using visual camera systems and meteorological parameters to determine the road status showed that they provide previously unknown information about road conditions. It was discovered that certain road conditions such as black ice is not always detectable using this technology. Therefore, research was performed that utilized the NIR region where it proved to be possible to detect and distinguish different road conditions, such as black ice. NIR camera technology was introduced in the research since the aim of the thesis was to find a method that provides information on the status of the road over a larger area. The results show that if several images taken in different spectral bands are analyzed with the support of advanced computer models, it is possible to distinguish between a dry, wet, icy and snowy surface. This resulted in the development of a NIR camera system that can distinguish between different surface statuses. Finally, two of these prototype systems for road condition classification were evaluated. These systems were installed at E14 on both sides of the border between Sweden and Norway. The results of these field tests show that this new road status classification, based on NIR imaging spectral analysis, provides new information about the status of the road surface, compared to what can be obtained from existing measurement systems, particularly for detecting differences in and between the wheel tracks.
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