| 1. |
- Wetterlund, Elisabeth, 1978-
(författare)
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System studies of forest-based biomass gasification
- 2012
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Bioenergy will play an important role in reaching the EU targets for renewable energy. Sweden, with abundant forest resources and a well-established forest industry, has a key position regarding modern biomass use. Biomass gasification (BMG) offers several advantages compared to biomass combustion-based processes, the most prominent being the possibility for downstream conversion to motor fuels (biofuels), and the potential for higher electrical efficiency if used for electricity generation in a biomass integrated gasification combined cycle (BIGCC). BMG-based processes in general have a considerable surplus of heat, which facilitates integration with district heating or industrial processes.In this thesis integration of large-scale BMG, for biofuel or electricity production, with other parts of the energy system is analysed. Focus is on forest-based biomass, with the analysis including techno-economic aspects as well as considerations regarding effects on global fossil CO2 emissions. The analysis has been done using two approaches – bottom-up with detailed case studies of BMG integrated with local systems, and top-down with BMG studied on a European scale.The results show that BMG-based biofuel or electricity production can constitute economically interesting alternatives for integration with district heating or pulp and paper production. However, due to uncertainties concerning future energy market conditions and due to the large capital commitment of investment in BMG technology, forceful economic support policies will be needed if BMG is a desired route for the future energy system, unless oil and electricity prices are high enough to provide sufficient incentives for BMG-based biofuel or electricity production. While BMG-based biofuel production could make integration with either district heating or pulp and paper production economically attractive, BIGCC shows considerably more promise if integrated with pulp and paper production than with district heating.Bioenergy use is often considered CO2-neutral, because uptake in growing plants is assumed to fully balance the CO2 released when the biomass is combusted. As one of the alternatives in this thesis, biomass is viewed as limited. This means that increased use of bioenergy in one part of the energy system limits the amount of biomass available for other applications, thus increasing the CO2 emissions for those applications. The results show that when such marginal effects of increased biomass use are acknowledged, the CO2 mitigation potential for BMG-based biofuel production becomes highly uncertain. In fact, most of the BMG-based biofuel cases studied in this thesis would lead to an increase rather than the desired decrease of global CO2 emissions, when considering biomass as limited.
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| 2. |
- Bergman, Frida, 1984-
(författare)
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Active workstations : a NEAT way to prevent and treat overweight and obesity?
- 2018
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Background: Modern society is triggering sedentary behaviours in different domains. Different strategies can be used to reduce the time spent sitting and increase physical activity in the office environment, which is one domain where sedentary time is often high. One such strategy could be to install treadmill workstations. With these, the office workers can walk on a treadmill while performing their usual work tasks at the computer. However, the long-term effects of these workstations are not known. Aim: The overall aim of this thesis was to investigate the long-term effects on sedentary behaviour, physical activity and associated health factors of installing treadmill workstations in offices compared to regular office work.Method: In this randomized controlled trial, 80 sedentary, middle-aged, healthy office workers with overweight or obesity were individually randomized into either an intervention or a control group. Those in the intervention group had a treadmill workstation installed at their sit-stand desk, to use for at least one hour per day for 13 months. They further received boosting e-mails at four time-points during the study. Participants in the control group continued to work as normal at their sit-stand office desk. All participants also received a health consultation at the beginning of the study, where they got to discuss physical activity and diet recommendations. Measurements reported include physical activity and sedentary behaviour, anthropometric measurements, body composition, metabolic outcomes, stress, depression and anxiety, cognitive function, structural brain images and interview data. Linear mixed models were used for the main statistical analyses of the quantitative data. An exploratory approach was also undertaken, using orthogonal partial least squares regression on the baseline data. Finally, interview data from participants in the intervention group were analysed using a modified Grounded Theory approach.Results: The intervention group increased their daily walking time and their number of steps at all follow-ups compared to the control group. Concomitantly, a decrease in moderate-to-vigorous intensity physical activity (MVPA) was observed within both groups, mainly during weekends. No intervention effects were observed on any of the body, cognitive or brain volume measurements. Our exploratory analyses revealed a significant association between smaller hippocampal volume and percentage sitting time among participants over 51 years of age. From the interview data, we discovered a core category, “The Capacity to Benefit”. The categories were described as the ideal types the Convinced, the Competitive, the Responsible and the Vacillating, based on the principal characteristics of the participants representing their different motivational status and strategies to reach the goal of benefitting from the intervention. Conclusion: It is possible to increase daily physical activity in office environments by introducing treadmill workstations. Future interventions should adapt strategies for the individuals based on their motivational level, but should also workwith the social and physical environment and with factors within the organization to gain the best effects of these interventions.
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| 3. |
- Erlandsson, Sara, 1979-
(författare)
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Hjälp för att bevara eller förändra? : Åldersrelaterade diskurser om omsorg, stöd och service
- 2014
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This thesis analyses the categorisation of adult persons who need help to cope in everyday life as either older persons or persons with a disability. Despite the development of social services in the Scandinavian countries being guided by the principles of universalism and equality, adults in need of care have different rights to support depending on their current age and at which age disability occurs. This thesis aims to explore how age-based differences in access to care, support and service are legitimised. In the thesis, the concept of help is used to refer to care, support and service.Using a discourse analytic approach, Swedish elderly and disability policies and websites through which providers of help market their services were examined. The analysis, inspired by the theoretical framework of governmentality, draws attention to how users of help and helpers are constituted in two age-related discourses on help. The first discourse, help to maintain, is used mainly in relation to older persons. In this discourse older persons are constituted as subjects in need of safety, comfort and company while the helpers are represented as caring and knowing. The second discourse, help to change, constitutes younger persons with a disability as citizens in becoming. Help aims to improve the situation for younger help users in varying ways: the opportunity to fully determine the tasks performed by helpers is essential to users of personal assistance whereas personal development as regards both practical and social skills is the key to change for persons with an intellectual or mental disability. While help for younger persons is represented as a means to enhance the individual’s self-determination and ability to participate in society, help for older persons is represented as aiming to maintain past patterns of life, not aspiring towards change or improvement. It is argued that these representations support a lower ambition for eldercare than for disability services.
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| 4. |
- Johansson, Karna, 1982-
(författare)
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Altered body composition in adults with complex congenital heart disease
- 2021
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Introduction: Thanks to achievements in paediatric heart surgery and medicine, the population of adults with surgically repaired or palliated congenital heart defects is growing. Many of these adults have reduced exercise capacity, weaker muscular strength and shorter height, all of which suggest an altered body composition.The overall aim of this thesis was to evaluate the body composition, in terms of bone, muscle and fat mass, in adults with complex congenital heart disease (CHD). Changes as such may be of prognostic importance and thus suggest future therapeutic targets outside the traditional hunting grounds of the cardiologist.Material and methods: The overall material consisted of two cohorts. The first cohort, recruited in a Swedish multicentre study, comprised 73 adult patients with complex CHD and 73 controls, matched for age and sex. Participants were examined with full body dual-energy x-ray absorptiometry (DXA), providing muscle, bone and fat mass for arms, legs and trunk respectively (papers I and II).The second cohort, recruited within a single centre study, comprised 49 adult patients with complex CHD and 49 age and sex matched controls. Participants were examined with peripheral quantitative computed tomography (pQCT), providing slices of forearm and calf, describing muscle, bone and fat area and corresponding density (papers III and IV). Muscular strength in selected muscle groups was also evaluated in both cohorts.Results: More than half of the adults with complex CHD had a pathologically low skeletal muscle mass and strength compared to controls, a trait referred to as sarcopenia. There was a strong association between forearm muscle mass and grip strength.Bone mass was lower in adults with complex CHD, according to both DXA and pQCT analyses, also when adjusting for shorter height. Patients also had lower full body bone mineral density (BMD) as measured with DXA. However, analysis of BMD in limbs with pQCT showed no such reduction. Despite this latter finding, the strength-strain index (a surrogate marker for bone strength provided by pQCT in the lower limbs) was still lower in patients compared to controls.Female patients had a higher amount of fat, both in terms of fat mass and proportion of fat, in comparison to controls. The fat mass was predominantly distributed around the internal organs, known as visceral adipose tissue. Male patients showed no such difference regarding fat mass compared to controls.Conclusion: Consequences of living with complex CHD go far beyond the heart; this young population presents a reduced skeletal muscle mass as well as reduced bone strength – both premature traits of frailty, prone to increase with further ageing. Also, women with complex CHD have an increased amount of visceral adipose tissue, which may elevate the risk of acquired heart disease.The extent of future complications remains to be seen. However, the standard treatments for both sarcopenia and osteoporosis include optimal nutritional intake and increased physical exercise. These measures should start sooner rather than later, preferably evaluated through existing quality registers and interventional trials.
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| 5. |
- Kilger, Magnus, 1974-
(författare)
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Talking talent : Narratives of youth sports selection
- 2017
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- In sports, there seems to be an eternal interest in discovering young talents and refining them into elite adult athletes. The dilemma of selecting talent, while at the same time ensuring every child´s right to participate, needs to be addressed and have consequences in social practice. This dissertation elucidates the discourse of selection and the process of selecting young sporting talents during final selection camps for youth national teams in football, hockey and floorball in Sweden. More specifically, the aim is to analyze how talent selection is organizationally legitimized, how “selectability” is produced in interaction and how specific narratives are used in success-stories. The empirical material includes research interviews, performance appraisal interviews (between district or national team coaches and the player) and field studies during ongoing final selection camp. Drawing on a discursive-narrative approach, the aim is to investigate how selection is discursively legitimized and, by using narrative analysis, how positioning in talk-in-interaction functions.The first article investigates the construction of legitimate selection within the Swedish Sports Confederation by analyzing their organizational documents, sport journals and literature for coach education. The findings show how a specific set of narratives are used to legitimize selection and how legitimacy works both individually to those within the selection system and on a wider arena of welfare politics. The second article investigates the co-construction of selectability in small story-interaction during interviews between the coach and a player in the final selection camp. The analyses highlight how this narrative genre produces certain stories and preferred positions. The third article analyzes how the young participants, in research interviews during final selection camp, uses discursively shared narratives to produce personal stories of success. The findings illustrate how the personal stories of success are balancing the dilemmatic space, positioning yourself as outstanding and at the same time appear a humble team player.The principal contribution of this dissertation is to show how talent is organizationally legitimized and how selectability is produced in interaction, as well as illustrate how specific stories are used in stories of success. This work investigates the discursive framework for selection and how rationalities for talent selection are produced (and reproduced) and co-constructed in narrative interaction. In this apparatus of selection it takes more than physical talent to be chosen; it takes talking talent.
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| 6. |
- Lindholm, Johanna, 1977-
(författare)
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Sexually exploited youths in the Swedish legal system : Conditions of victimhood
- 2015
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This thesis explores how the Swedish legal system, specifically the police and district courts, understand and construct cases of human trafficking for sexual purposes and procuring with under-age victims. It draws on police investigative interviews and court decisions in 22 pronounced district court sentences, involving 36 female youths. Theoretically the thesis primarily builds on social constructionism and the sociology of childhood. Methodologically it builds on coding of forensic interviews, narrative analysis and discourse analysis.Study I explores the informativeness of 24 of the 36 adolescents when interviewed by the police. It shows that the adolescents were informative yet evasive, specifically when asked open questions. Experiences of violence and force as well as interviews conducted soon after the police intervention further contributed to evasiveness. Also evasiveness seemed intimately connected to circumstances in each unique case.Study II scrutinises the image of the ideal trafficking victim by asking how the issue of responsibility is handled when police interviews turn to prostitution. It also analyses which interactive and narrative conditions, related to agency and stake, apply for talk in this specific institutional setting. The findings suggest that in order to sort out the ‘real’ victims, the interrogator needs to pull apart the two categories ‘victim’ and ‘prostitute’ even if there may be problems with this clear-cut distinction since the categories tend to blend together. Further, in this institutional setting to talk about sex can be problematic as it may undermine the victim narrative instead creating a subject with interests.Study III explores how Swedish district courts assess the credibility of alleged victims of human trafficking for sexual purposes and the reliability of their testimonies. The findings indicate that the judges base their assessments on the Swedish Supreme Courts’ criteria of how to understand reliability and credibility but they seemed also to be influenced by extra-legal factors relating to victims’ behaviour. Further, the findings imply that the judges used the Supreme Court’s criteria to argue both for and against credibility. By so doing, their arguments supported the decision reached irrespective of how the adolescents reported or what impression they made.In brief this thesis can be said to point to a legal dilemma when law on paper is applied in practice as each unique adolescent must be recognized by the authorities as fitting the administrative category ‘victim’. When put into practice, categories are rarely neat and clear hence such categorizing becomes a phenomenon negotiated in interaction. Also, this legal context sets up limits and possibilities for the adolescents’ agency and this too can be said to have a bearing on if she is, or is not, constructed as a victim. In short, this thesis shows certain conditions of victimhood.
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| 7. |
- Öhman, Marie, 1958-
(författare)
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Kropp och makt i rörelse
- 2007
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Body and Power in MotionThis dissertation is concerned with body and politics, or, more specifi cally body, power and governance. The central question is how specifi c individuals and bodies are constituted in the teaching of Physical Education (PE) in school. Inspired by Foucault’s work and the research fi eld that emanates from the concept of governmentality, one of the ambitions is to develop a method that facilitates the study of power and governance processes in teachers’ and students’ interactive actions and dealings. With the aid of this approach, 15 video-recorded physical education lessons in 5 Swedish nine-year compulsory schools are analysed in order to demonstrate how governance processes are included in the work and activities in terms of how the processes of governance–self-governance are staged, and the direction this takes. In using the term direction I am here referring to the content the governance is aiming towards, where the question of which subjects and bodies are constituted is of substantial interest. This means that the study not only focuses on what is done, but also on the way in which it is done, i.e. it analyses both process and content.The results show that physical exertion and the desire for physical work is a thread that runs though the analysed material. It is mainly scientifi c knowledge about the body that is referred to in actual teaching practice. This is displayed through the use of a scientifi cally inspired language when talking about the body, where effects on muscles and degrees of oxygen intake are considered in connection with the physical activities. In connection with physical exertion, pupils are encouraged to do their best, try the activities on offer, cooperate with others and face challenges. In line with the governmentality perspective’s problematisation of the process governance–self-governance, the study highlights a governance mentality that is not characterised by coercion, but is rather directed towards different components of willingness where the students are expected to be participatory, take responsibility and govern their own actions in the direction of that which is most desirable and reasonable. The willingness component appears as the actual hub of character-building, were the students ought to be physically active, should want to do their best, be willing to try, should want to show solidarity and should want to defeat the others. The process of governance–self-governance is staged as different ways of appealing to one’s willingness in the activities studied. Specifi c governance techniques are used to support and promote self-governance work, i.e. different forms of encouragement strengthen the correct action, emphasising physical exertion as pleasurable and focuses on the fact that we are all involved in a common project. In the dissertation it is shown how the body is included in a socio-political context. Through the body the individual is turned into a participant of physical projects concerned with becoming a certain kind of social citizen. The body thus symbolises the complex encounter between the individual and society. In this way the study demonstrates and highlights tendencies that are evident in modern society. It is thus a narrative that indicates how we all become part of a discourse system.
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| 8. |
- Bergens, Oscar, 1991-
(författare)
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Chronic Systemic Inflammation, Body Composition and Physical Activity Behaviours in Older Adults
- 2022
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Ageing is associated with a gradual physical decline accompanied by changes in body composition. The occurrence of a low-grade yet chronic state of systemic inflammation has gained interest for its potential consequences in the ageing process. Importantly, a physically active lifestyle may promote the maintenance of muscle mass, reduction in adipose tissue, and alleviate progression of a chronic pro-inflammatory state. The overall aim of this thesis was to explore relationships between biomarkers of systemic inflammation, body composition, and physical activity behaviours in community-dwelling older adults aged 65 to 70 years.A main finding of the thesis is the existence of associations between body composition and systemic inflammation in older adults, where excess adipose tissue is adversely associated with levels of inflammatory biomarkers in older women. Inverse associations were also observed between muscle mass and levels of pro-inflammatory biomarkers in older women. This thesis also highlights sex-specific associations between systemic inflammation and physical activity behaviours. Longer time spent sedentary was also associated with higher levels of proinflammatory biomarkers in older women and lower level of antiinflammatory biomarkers in older men. Reallocating time spent in activities of lower intensities with higher intensities was associated with lower levels of pro-inflammatory biomarkers in older women. Overall, the findings of this thesis support efforts promoting physical activity at the expense of sedentary time in order to combat age-related systemic inflammation and metabolic risk in older adults.
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| 9. |
- Bergström, Göran, 1964, et al.
(författare)
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Prevalence of Subclinical Coronary Artery Atherosclerosis in the General Population
- 2021
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Ingår i: Circulation. - Philadelphia : American Heart Association. - 0009-7322 .- 1524-4539. ; 144:12, s. 916-929
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Tidskriftsartikel (refereegranskat)abstract
- Background: Early detection of coronary atherosclerosis using coronary computed tomography angiography (CCTA), in addition to coronary artery calcification (CAC) scoring, may help inform prevention strategies. We used CCTA to determine the prevalence, severity, and characteristics of coronary atherosclerosis and its association with CAC scores in a general population.Methods: We recruited 30 154 randomly invited individuals age 50 to 64 years to SCAPIS (the Swedish Cardiopulmonary Bioimage Study). The study includes individuals without known coronary heart disease (ie, no previous myocardial infarctions or cardiac procedures) and with high-quality results from CCTA and CAC imaging performed using dedicated dual-source CT scanners. Noncontrast images were scored for CAC. CCTA images were visually read and scored for coronary atherosclerosis per segment (defined as no atherosclerosis, 1% to 49% stenosis, or ≥50% stenosis). External validity of prevalence estimates was evaluated using inverse probability for participation weighting and Swedish register data.Results: In total, 25 182 individuals without known coronary heart disease were included (50.6% women). Any CCTA-detected atherosclerosis was found in 42.1%; any significant stenosis (≥50%) in 5.2%; left main, proximal left anterior descending artery, or 3-vessel disease in 1.9%; and any noncalcified plaques in 8.3% of this population. Onset of atherosclerosis was delayed on average by 10 years in women. Atherosclerosis was more prevalent in older individuals and predominantly found in the proximal left anterior descending artery. Prevalence of CCTA-detected atherosclerosis increased with increasing CAC scores. Among those with a CAC score >400, all had atherosclerosis and 45.7% had significant stenosis. In those with 0 CAC, 5.5% had atherosclerosis and 0.4% had significant stenosis. In participants with 0 CAC and intermediate 10-year risk of atherosclerotic cardiovascular disease according to the pooled cohort equation, 9.2% had CCTA-verified atherosclerosis. Prevalence estimates had excellent external validity and changed marginally when adjusted to the age-matched Swedish background population.Conclusions: Using CCTA in a large, random sample of the general population without established disease, we showed that silent coronary atherosclerosis is common in this population. High CAC scores convey a significant probability of substantial stenosis, and 0 CAC does not exclude atherosclerosis, particularly in those at higher baseline risk.
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| 10. |
- Blomberg, Helena
(författare)
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Mobbning, intriger, offerskap : att tala om sig själv som mobbad i arbetslivet
- 2010
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This thesis is a study of bullying narratives, mainly co-produced in a process of ongoing interaction. The focus is on how narrators rhetorically organize their storytelling and identity work by using discursive resources. The empirical material consists of 12 interviews with, and 12 written stories by people who have been exposed to workplace bullying plus information from three websites about bullying, and previous research. The overarching aim of the study is to identify how a bullying discourse is produced, reproduced, challenged and negotiated in bullied persons’ narratives. Specific aims are to determine how bullying is portrayed publicly, how narrators with experience of being bullied build their stories, how the narratives stand in relation to victimization, what makes it possible to talk about vulnerability and what are its limits, and finally to develop a narrative approach.Theoretically and methodologically, the study has its basis in narrative analysis, discursive psychology, conversation analysis, and metaphor analysis. The study shows how the narrators categorize themselves as active, competent, and consensus seeking. They resist being victimized, but by their use of the interpretative repertoire and a standard story of bullying, they nevertheless become indirectly victimized. What’s at stake, in the narratives, is the question of guilt, which they rhetorically evade by the use of different metaphors. These metaphors depict bullying as a mystery, a lifelong source of suffering, a transformation, a learning experience, a battle, a contagious virus, and a trap. The narrators are constrained by the narrative conditions, the interpretative repertoire, standard story, and narrative form and content – a story of good and evil when creating their own story. The narrative conditions at the same time set the limit for expressing oneself in the identity work. This also means we are part of the production and reproduction of the bullying discourse when I, as a researcher, and the narrators use the repertoire and the standard story in mutual understanding.
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