| 1. |
- Argentzell, Elisabeth, et al.
(författare)
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Exploring mediators of the recovery process over time among mental health service users, using a mixed model regression analysis based on cluster RCT data
- 2020
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Ingår i: BMC Psychiatry. - : Springer Science and Business Media LLC. - 1471-244X. ; 20:1
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Tidskriftsartikel (refereegranskat)abstract
- Background: Personal recovery is associated with many significant health-related factors, but studies exploring associations between activity factors and personal recovery among service users are scarce. The aims of this study were hence to; 1) investigate if various aspects of activity may mediate change in recovery while also acknowledging clinical, sociodemographic and well-being factors; 2) explore the effects of two activity-based interventions, Balancing Everyday Life (BEL) or standard occupational therapy (SOT), on personal recovery among service users. Methods: Two-hundred-and-twenty-six service users were included in a cluster RCT, 133 from BEL units and 93 from SOT units. Participants commonly had a diagnosis of mood disorder and the mean age was 40. Instruments used targeted activity, mastery and functioning. A mixed-model regression analysis was employed. Results: The model tested was whether selected variables could be used to mediate the change in recovery from the start to a six-month follow-up after intervention. Participants’ personal recovery increased after treatment and increased further at the follow-up. The general level of recovery was negatively related to a diagnosis of depression/anxiety, both before and after treatment, but depressed/anxious service users still increased their recovery. There were no significant relations between recovery and sex or age. The interactions between change in recovery and changes in depression/anxiety, satisfaction with activities, sex, and age were all non-significant. All possible treatment mediators included were related to change in recovery, the strongest being occupational engagement and mastery, followed by activity satisfaction and symptoms. Mediation was shown by the decrease in the effect of the time factor (from intervention start to completion) when the covariates were introduced. In all cases the time variable was still significant. When testing a model with all variables simultaneously as covariates, occupational engagement and mastery were strongly significant. There was no difference between interventions regarding recovery improvement. Conclusion: The treatments were equally beneficial and were effective regardless of gender, age and diagnosis. Those who gained most from the treatment also gained in feelings of mastery and activity engagement. Activity engagement also moderated the level of recovery. To enhance recovery, interventions should facilitate meaningful activities and gaining control in life. Trial registration: The study was registered with ClinicalTrials.gov. Reg. No. NCT02619318. Retrospectively registered: December 2, 2015.
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| 2. |
- Carleo, Ilaria, et al.
(författare)
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The Multiplanet System TOI-421*
- 2020
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Ingår i: Astronomical Journal. - : American Astronomical Society. - 1538-3881 .- 0004-6256. ; 160:3
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Tidskriftsartikel (refereegranskat)abstract
- We report the discovery of a warm Neptune and a hot sub-Neptune transiting TOI-421 (BD-14 1137, TIC 94986319), a bright (V = 9.9) G9 dwarf star in a visual binary system observed by the Transiting Exoplanet Survey Satellite (TESS) space mission in Sectors 5 and 6. We performed ground-based follow-up observations-comprised of Las Cumbres Observatory Global Telescope transit photometry, NIRC2 adaptive optics imaging, and FIbre-fed Echelle Spectrograph, CORALIE, High Accuracy Radial velocity Planet Searcher, High Resolution echelle Spectrometer, and Planet Finder Spectrograph high-precision Doppler measurements-and confirmed the planetary nature of the 16 day transiting candidate announced by the TESS team. We discovered an additional radial velocity signal with a period of five days induced by the presence of a second planet in the system, which we also found to transit its host star. We found that the inner mini-Neptune, TOI-421 b, has an orbital period of P-b = 5.19672 +/- 0.00049 days, a mass of M-b = 7.17 +/- 0.66 M-circle plus, and a radius of R-b = R-circle plus, whereas the outer warm Neptune, TOI-421 c, has a period of P-c = 16.06819 +/- 0.00035 days, a mass of M-c = 16.42(-1.04)(+1.06)M(circle plus), a radius of R-c = 5.09(-0.15)(+0.16)R(circle plus), and a density of rho(c) = 0.685(-0.072)(+0.080) cm(-3). With its characteristics, the outer planet (rho(c) = 0.685(-0.0072)(+0.080) cm(-3)) is placed in the intriguing class of the super-puffy mini-Neptunes. TOI-421 b and TOI-421 c are found to be well-suited for atmospheric characterization. Our atmospheric simulations predict significant Ly alpha transit absorption, due to strong hydrogen escape in both planets, as well as the presence of detectable CH4 in the atmosphere of TOI-421 c if equilibrium chemistry is assumed.
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| 3. |
- Córdova-Palomera, Aldo, et al.
(författare)
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Genetic control of variability in subcortical and intracranial volumes
- 2021
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Ingår i: Molecular Psychiatry. - : Nature Publishing Group. - 1359-4184 .- 1476-5578. ; 26:8, s. 3876-3883
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Tidskriftsartikel (refereegranskat)abstract
- Sensitivity to external demands is essential for adaptation to dynamic environments, but comes at the cost of increased risk of adverse outcomes when facing poor environmental conditions. Here, we apply a novel methodology to perform genome-wide association analysis of mean and variance in ten key brain features (accumbens, amygdala, caudate, hippocampus, pallidum, putamen, thalamus, intracranial volume, cortical surface area, and cortical thickness), integrating genetic and neuroanatomical data from a large lifespan sample (n = 25,575 individuals; 8-89 years, mean age 51.9 years). We identify genetic loci associated with phenotypic variability in thalamus volume and cortical thickness. The variance-controlling loci involved genes with a documented role in brain and mental health and were not associated with the mean anatomical volumes. This proof-of-principle of the hypothesis of a genetic regulation of brain volume variability contributes to establishing the genetic basis of phenotypic variance (i.e., heritability), allows identifying different degrees of brain robustness across individuals, and opens new research avenues in the search for mechanisms controlling brain and mental health.
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| 4. |
- Egeland, Jens, et al.
(författare)
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Effects of auditory white noise stimulation on sustained attention and response time variability
- 2023
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Ingår i: Frontiers in Psychology. - 1664-1078. ; 14
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Tidskriftsartikel (refereegranskat)abstract
- Introduction: “The moderate brain arousal model” claims that white noise improves attention by optimizing brain arousal. We analyze Conners’ Continuous Performance Test-3 (CCPT-3) performance, expecting to find reduced reaction time variability with noise mediated by decrease under long event-rates and in later parts of the test, indicating that noise reverse fall in phasic and tonic arousal. Methods: Sixty-five children with high or lower ADHD-symptoms from a child psychiatric unit, succeeded to complete the CCPT-3 with and without white noise. Results: Noise reduced overall variability, improved performance in later parts of the test, and reduced response variability under the longest event rate particularly in the high symptoms group. No overall change in omissions and commissions, but the high symptoms group made fewer omissions during noise compared the low symptom group. Discussion: The study indicates an arousal effect of noise but should be replicated with other noise variants and amplitudes to improve effect and compliance.
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| 5. |
- Eklund, Mona, et al.
(författare)
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The impact of the BEL intervention on levels of motivation, engagement and recovery in people who attend community mental health services
- 2023
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Ingår i: Scandinavian Journal of Occupational Therapy. - : Informa UK Limited. - 1103-8128 .- 1651-2014. ; 30:6, s. 862-872
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Tidskriftsartikel (refereegranskat)abstract
- Background: Community-based day centres (DC) in Sweden provide support to people with severe mental health problems. The role of DC motivation for outcomes in terms of occupational engagement and personal recovery is yet unknown. Aims: To compare two groups who received DC services, one of which also received the 16-week Balancing Everyday Life (BEL) intervention. The focus was motivation for DC services at baseline and after 16 weeks of services, while also investigating the importance of DC motivation for the selected outcomes and service satisfaction. Material and Methods: Sixty-five DC attendees were randomised to BEL (n = 27) or standard support (n = 38) and responded to questionnaires about motivation, the selected outcomes and satisfaction with DC services. Results: The groups did not differ on any measured aspects of motivation; nor were changes seen over time. The BEL group, but not those receiving standard support, improved from baseline to 16 weeks on occupational engagement and recovery. Motivation for attending the DC was related to service satisfaction. Conclusion: The BEL program could be a viable enrichment tool in the DC context and boost occupational engagement and personal recovery among the attendees. Significance: The study provided knowledge of importance when developing community-based services while enhancing motivation.
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| 6. |
- Hultqvist, Jenny, et al.
(författare)
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Predictors of clinically important improvements in occupational and quality of life outcomes among mental health service users after completion and follow-up of a lifestyle intervention : multiple regression modelling based on longitudinal data
- 2019
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Ingår i: BMC psychology. - : Springer Science and Business Media LLC. - 2050-7283. ; 7:1
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Balancing Everyday Life (BEL) is a new activity-based lifestyle intervention for mental health service users. An earlier study found BEL to be effective in increasing occupational engagement, occupational balance, activity level, and quality of life scores when compared with a care-as-usual group. However, it is unclear whether care context and socio-demographic, clinical and self-related factors at baseline also influence the results. Thus, the aim of the current study was to explore whether such factors could predict clinically important improvements in occupational and quality of life aspects. METHODS: Participants were interviewed and filled out self-report questionnaires before starting the 16-week intervention (n = 133), upon completion (n = 100), and 6 months following (n = 89). Bi-variate and multi-variate statistical analyses were performed. RESULTS: Several baseline factors were associated with clinically important improvements, but few predictors were found in the multivariate analyses. Having children was found to be a predictor of improvement in occupational engagement at BEL completion, but reduced the chance of belonging to the group with clinically important improvement in activity level at follow-up. Regarding occupational balance, having a close friend predicted belonging to the group with clinically important improvement in the leisure domain. At BEL completion, other predictors for improvements were female gender for the self-care domain, and self-esteem for the home chores domain. At follow-up, psychosocial functioning and lower education level predicted general balance. None of the factors explored in this study were found to be predictors for improvements in quality of life. CONCLUSIONS: Few of the studied care context, socio-demographic, clinical and self-related factors were found to predict clinically important improvements in occupational engagement, activity level, occupational balance, or QOL. This study, together with previous studies showing positive results, suggests that BEL can be an appropriate intervention in both community and clinical settings, and can support improvement in occupational aspects and QOL for participants with diverse socio-demographic, clinical, and self-related characteristics. TRIAL REGISTRATION: This study is part of a larger research project that is registered at ClinicalTrials.gov. Reg. No. NCT02619318.
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| 7. |
- Kaufmann, Tobias, et al.
(författare)
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Common brain disorders are associated with heritable patterns of apparent aging of the brain
- 2019
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Ingår i: Nature Neuroscience. - : Nature Publishing Group. - 1097-6256 .- 1546-1726. ; 22:10, s. 1617-
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Tidskriftsartikel (refereegranskat)abstract
- Common risk factors for psychiatric and other brain disorders are likely to converge on biological pathways influencing the development and maintenance of brain structure and function across life. Using structural MRI data from 45,615 individuals aged 3-96 years, we demonstrate distinct patterns of apparent brain aging in several brain disorders and reveal genetic pleiotropy between apparent brain aging in healthy individuals and common brain disorders.
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| 8. |
- Lam, Kristine W. F., et al.
(författare)
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It Takes Two Planets in Resonance to Tango around K2-146
- 2020
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Ingår i: Astronomical Journal. - : American Astronomical Society. - 1538-3881 .- 0004-6256. ; 159:3
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Tidskriftsartikel (refereegranskat)abstract
- K2-146 is a cool, 0.358M dwarf that was found to host a mini-Neptune with a 2.67 day period. The planet exhibited strong transit timing variations (TTVs) of greater than 30 minutes, indicative of the presence of an additional object in the system. Here we report the discovery of the previously undetected outer planet in the system, K2-146 c, using additional photometric data. K2-146 c was found to have a grazing transit geometry and a 3.97 day period. The outer planet was only significantly detected in the latter K2 campaigns presumably because of precession of its orbital plane. The TTVs of K2-146 b and c were measured using observations spanning a baseline of almost 1200 days. We found strong anti -correlation in the TTVs, suggesting the two planets are gravitationally interacting. Our TTV and transit model analyses revealed that K2-146 b has a radius of 2.25 0.10 Re and a mass of 5.6 0.7 Me, whereas K2-146 c has a radius of 2.591 Re and a mass of 7.1 0.9 Me. The inner and outer planets likely have moderate eccentricities of e = 0.14 0.07 and 0.16 0.07, respectively. Long-term numerical integrations of the two -planet orbital solution show that it can be dynamically stable for at least 2 Myr. We show that the resonance angles of the planet pair are librating, which may be an indication that K2-146 b and c are in a 3:2 mean motion resonance. The orbital architecture of the system points to a possible convergent migration origin.
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| 9. |
- Lund Bjørnås, Kristine, 1991-, et al.
(författare)
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Modeling Atlantic salmon (Salmo salar) and brown trout (S. trutta) population responses and interactions under increased minimum flow in a regulated river
- 2021
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Ingår i: Ecological Engineering. - : Elsevier. - 0925-8574 .- 1872-6992. ; 162
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Tidskriftsartikel (refereegranskat)abstract
- Describing and understanding the relationship between streamflow and ecological processes is a classic problem in stream ecology and river management. We applied the individual-based model inSTREAM to describe the relationship between the dynamic river habitat and emergent population responses in sympatric landlocked Atlantic salmon (Salmo salar) and lake-migrating brown trout (Salmo trutta). This application explicitly describes the environmental conditions in the Gullspang Rapids, a residual flow stretch in the hydropower-regulated Gullspang River, Sweden (Svenskt elfiskeregister - SERS, 2019) etween September 2008 and September 2018. We simulated three static minimum flow scenarios and three variable natural flow regimes, contrasting highly artificial conditions with more natural dynamics. Our main response variable was the number of large (>= 12 cm) out-migrants of salmon and trout, a proxy for successful population recruitment. The baseline model predicted an average production of 455 salmon and 532 trout out-migrants per year during 2008-2018 in this 11,700 m(2) spawning and rearing area. The only alternative scenario producing more out-migrants was when the minimum flow was raised by a factor of three, as this led to a modest increase in trout out-migrants. Interestingly, none of the flow alternatives produced more salmon out-migrants than the baseline model, suggesting a competitive disadvantage originating from spawning later than trout. Density-dependent population regulation, a well-known phenomenon in salmonids, was reproduced by the model. Both intra- and interspecific competition was evident. While the number of out-migrants varied with flow regime, sensitivity analyses showed that other model input, specifically velocity shelter availability and stream temperature, were just as important. Increased availability of velocity shelters (in-stream structures that reduces the swimming speed of drift-feeding fish) was the only environmental factor that increased production of both salmon and trout in silico. We conclude that in this system, flow restoration based on simplistic flow scenarios will have limited effect, unless complemented by an increase of instream structural complexity.
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| 10. |
- Lund Bjørnås, Kristine, 1991-
(författare)
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Modeling Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) responses to river habitat alteration
- 2020
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Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Half the world’s river volume is affected by flow alterations and/or fragmentation, a figure that is likely to increase with the current global surge in hydropower development. At the same time, freshwater biodiversity is in rapid decline. In fluvial ecosystems, streamflow is a master variable, shaping riverine species’ habitat over space and time. Atlantic salmon (Salmo salar) and brown trout (S. trutta) are examples of species that need fluvial habitats for reproduction and juvenile rearing, and whose flow needs can come in conflict with hydropower production objectives. This necessitates tools for predicting the effect of fluvial habitat alteration on fish production.In this thesis, I applied the individual-based model inSTREAM to simulate salmon and trout in the Gullspång Rapids, a residual flow stretch of the Gullspång River, Sweden, over a ten-year period. InSTREAM uses sub-daily time steps to simulate individual fish interacting with their biotic and physical environment, and tracks the fitness consequences of their main actions: habitat and activity selection. For inSTREAM input, I had to describe key habitat features, create a 2D hydraulic model of the rapids, model river temperature, and gather data on salmon and trout eco-physiology and life history characteristics in the Gullspång River. I ran simulation experiments varying either flow input, the number of spawners, spawning gravel, shelter and boulder availability, or temperature. Flow alterations had limited benefit. Only the scenario where the current minimum flow was set three times higher yielded increased production, and only for trout. Trout dominated salmon in competition, and production was density dependent. The model predicted that the only way to increase production of both species at current spawner numbers was to add instream structures offering more energetically profitable feeding positions.
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| 11. |
- Lund Bjørnås, Kristine, 1991-, et al.
(författare)
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Modifying and parameterizing the individual-based model inSTREAM for Atlantic salmon and brown trout in the regulated Gullspång River, Sweden
- 2023
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Ingår i: MethodsX. - : Elsevier. - 1258-780X .- 2215-0161.
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Tidskriftsartikel (refereegranskat)abstract
- We modified, parameterized, and applied the individual-based model inSTREAM version 6.1 for lake-migrating populations of landlocked Atlantic salmon (Salmo salar) and brown trout (S. trutta) in a residual flow stretch of the hydropower-regulated Gullspång River, Sweden. This model description is structured according to the TRACE model description framework. Our aim was to model responses in salmonid recruitment to alternative scenarios of flow release and other environmental alterations. The main response variable was the number of large out-migrating juvenile fish per year, with the assumption that individuals are more inclined to out-migrate the larger they get, and that migration is an obligatory strategy. Population and species-specific parameters were set based on local electrofishing surveys, redd surveys, physical habitat surveys, broodstock data as well as scientific literature. • Simulations were set to run over 10 years, with sub-daily time steps, in this spatially and temporally explicit model. • Model calibration and validation of fish growth was done using data on juvenile fish from electrofishing. • The results were found to be sensitive to parameter values for aggregated fish, i.e., “superindividuals” and for the high temperature limit to spawning.
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| 12. |
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| 13. |
- Lund, Kristine
(författare)
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Balancing Everyday Life. Exploring change following an activity-based lifestyle intervention for mental health service users.
- 2019
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- There is limited research that evaluates occupational therapy and lifestyle interventions,especially for mental health service users. This thesis provides increased knowledge and understanding of the processes and factors that led to betterquality of everyday life, engagement in meaningful activities, and balance forparticipants who took part in the Balancing Everyday Life (BEL) intervention.BEL was implemented in 2012-2015 as part of a larger research project, of whichthis dissertation is part. BEL is a group-based occupational therapyintervention that aims to support overall well-being and recovery throughfinding a personalized balance of meaningful activities and relationships.Study I investigated whether socio-demographic, care context, clinical and self-related factors could predict clinically important improvements in the outcomes mentioned above. Data collection took place with 133 participants at baseline, and thenagain at BEL end and six months following. Bi-variate analyses and thenmultivariate regression analyses were performed. Though many associations werefound, few factors were identified as predictors in the regression analyses.The strongest predictors of belonging to the improved groups for occupationalbalance included having a friend for the leisure domain of occupational balanceand female gender for the self-care domain. Having children was found to be apredictor for improved occupational engagement.Studies II-IV used aqualitative Grounded Theory approach. Nineteen participants were interviewedafter BEL, and some were interviewed mid-intervention and 1.5-2 years afterBEL. Study II focused on the meaning of the group for the BEL participants, anda process of meaning-making through group participation was constructed ofthree categories: Joining with others, Sense of belonging, and Re-valuing Self.Those who experienced the most meaning reported feeling less lonely, moreconnected, as well as respected and worthy.Study III focused onthe processes at work that supported making lifestyle changes. A process ofmaking changes was constructed, consisting of five categories: Going at itgently: change is an on-going process; Support for progress, permission tofail; Prioritizing and setting boundaries; Adjusting for a sustainable balance;and Caring for a valued Self. Each category included a strategy for change aswell as a related inner change. A more self-compassionate approach seemed to bea key for caring for Self and making sustainable changes.Study IV focused onperceptions of the BEL format and content and included focus group and/orindividual interviews with 12 group leaders and 19 participants. Both partiesfelt that they had benefited from BEL’s structure and manual, yet flexibilitywas desired. BEL appeared to create bridges - to other people, to society atlarge, and to a future version of everyday life. BEL’s occupation- andperson-focused approach was appreciated. Group leaders experienced BEL as easyto implement and some felt it strengthened their professional role.Participants appreciated feeling respected and listened to by the groupleaders, and appreciated them maintaining structure in the group. Regardinghindering factors, group leaders mentioned mainly material obstacles, such asthe lack of suitable group rooms or projector. Participants felt that toodifferent functional levels between the group participants could be anobstacle.As similar researchand interventions are lacking, this dissertation provides an importantcontribution to the knowledge base for occupational therapeutic interventionsin the psychiatric field.
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| 14. |
- Lund, Kristine, et al.
(författare)
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Breaking a cycle of perceived failure : The process of making changes toward a more balanced lifestyle
- 2019
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Ingår i: Australian Occupational Therapy Journal. - : Wiley. - 0045-0766 .- 1440-1630. ; 66:5, s. 627-636
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Tidskriftsartikel (refereegranskat)abstract
- Introduction: Balancing Everyday Life (BEL) is a new lifestyle intervention for mental health services users, developed to support meaningful engagement in daily activities and a balanced lifestyle. This study aimed at exploring the BEL participants’ process of making lifestyle changes. Methods: This constructivist grounded theory study took place in Sweden from 2013–2017 and explored the processes of 19 BEL participants when making lifestyle changes. Data were collected through 29 interviews. Results: A process of breaking a cycle of perceived failure and making changes toward a more balanced lifestyle was constructed, consisting of five categories: Going at it gently: change is an on-going process; Support for progress, permission to fail; Prioritising and setting boundaries; Adjusting for a sustainable balance; and Caring for a valued self. Each category included a strategy for change as well as a related inner change. Strategies involved learning and trying techniques for making changes toward a more balanced lifestyle, whereas the personal changes often involved a more self-compassionate approach and allowing oneself to utilise these techniques. Conclusion: The results contribute to knowledge in the process of making lifestyle changes, specifically, how strategies for change and inner changes interact and can support personal recovery toward mental health. This knowledge could help to support clients in making personally meaningful changes toward a more balanced lifestyle as well as inform future research in the process of making change.
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| 15. |
- Lund, Kristine, et al.
(författare)
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Group leader and participant perceptions of Balancing Everyday Life, a group-based lifestyle intervention for mental health service users
- 2020
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Ingår i: Scandinavian Journal of Occupational Therapy. - : Informa UK Limited. - 1103-8128 .- 1651-2014. ; 27:6, s. 462-473
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Tidskriftsartikel (refereegranskat)abstract
- Background: There exist few recovery and occupation-based interventions for mental health service users. Balancing Everyday Life (BEL) is a new occupation-based lifestyle intervention that was created to fill this need. Aim: To gain group leaders’ and participants’ perspectives of the BEL intervention content and format, including factors that helped, hindered, and could be improved. Methods: A constructivist grounded theory method guided data collection and analysis. Interviews took place with 12 BEL group leaders and 19 BEL participants from out-patient psychiatry settings and community-based day centers in Sweden. Results: BEL’s structure and content were appreciated, yet flexibility was desired to adapt to participant needs. BEL could act as a bridge, helping participants connect with others, and to a more engaged and balanced everyday life. Facilitating factors included a person-focused (versus illness-focused) approach, physical and emotional environments, and connection. Barriers included room resources. More sessions were desired for the intervention. Conclusion: Group leaders and participants experienced BEL as a useful tool to instigate meaningful change and connection in the participants’ lives. The combination of a positive person-focused approach and group support was appreciated. These results could inform future research, evaluation, and development of occupation-focused lifestyle interventions for mental health service users.
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| 16. |
- Lund, Kristine, et al.
(författare)
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Joining, belonging, and re-valuing : a process of meaning-making through group participation in a mental health lifestyle intervention
- 2019
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Ingår i: Scandinavian Journal of Occupational Therapy. - : Informa UK Limited. - 1103-8128 .- 1651-2014. ; 26:1, s. 55-68
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Tidskriftsartikel (refereegranskat)abstract
- Background: Balancing Everyday Life (BEL), a new group-based intervention for mental health service users, was implemented in Sweden. Mental health service users often experience group interventions as meaningful, but knowledge of the process of meaning-making in a group is lacking. Aim: To explore participants’ perceptions of the group in the Balancing Everyday Life (BEL) lifestyle intervention; specifically, personal experiences of what brings meaning when participating in a group. Methods: This qualitative Grounded Theory study included 26 interviews with 19 BEL participants. Results: A process of meaning-making in a group was constructed: Joining with others: from feeling alone to connected, A sense of belonging: mutual support and understanding, and Re-valuing Self: respect and self-worth. No longer feeling alone contributed to meaning. Peers and group leaders were considered important parts of the group, and participants appreciated feeling understood, respected, and helping others. Conclusion: The proposed process of meaning-making, as well as ‘Joining’ as a unique step, seems to be new contributions which could help practitioners when organizing groups. Overcoming fear of joining could break a cycle of isolation and lead to connecting and belonging. The value of participants finding purpose through helping others should be further explored.
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| 17. |
- Nowak, Grzegorz, et al.
(författare)
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K2-280 b - a low density warm sub-Saturn around a mildly evolved star
- 2020
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Ingår i: Monthly Notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 497:4, s. 4423-4435
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Tidskriftsartikel (refereegranskat)abstract
- We present an independent discovery and detailed characterization of K2-280 b, a transiting low density warm sub-Saturn in a 19.9-d moderately eccentric orbit (e = 0.35(-0.04)(+0.05)) from K2 campaign 7. A joint analysis of high precision HARPS, HARPS-N, and FIES radial velocity measurements and K2 photometric data indicates that K2-280 b has a radius of R-b = 7.50 +/- 0.44 R-circle plus and a mass of M-b = 37.1 +/- 5.6 M-circle plus, yielding a mean density of rho(b) = 0.48(-0.10)(+0.13) g cm(-3). The host star is a mildly evolved G7 star with an effective temperature of T-eff = 5500 +/- 100 K, a surface gravity of log g(star) = 4.21 +/- 0.05 (cgs), and an iron abundance of [Fe/H] = 0.33 +/- 0.08 dex, and with an inferred mass of M-star = 1.03 +/- 0.03 M-circle dot and a radius of R-star = 1.28 +/- 0.07 R-circle dot. We discuss the importance of K2-280 b for testing formation scenarios of sub-Saturn planets and the current sample of this intriguing group of planets that are absent in the Solar system.
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| 18. |
- Ostergaard, Mikkel, et al.
(författare)
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Certolizumab pegol, abatacept, tocilizumab or active conventional treatment in early rheumatoid arthritis : 48-week clinical and radiographic results of the investigator-initiated randomised controlled NORD-STAR trial
- 2023
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Ingår i: Annals of the Rheumatic Diseases. - : BMJ PUBLISHING GROUP. - 0003-4967 .- 1468-2060. ; 82:10, s. 1286-1295
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Tidskriftsartikel (refereegranskat)abstract
- Background The optimal first-line treatment in early rheumatoid arthritis (RA) is debated. We compared clinical and radiographic outcomes of active conventional therapy with each of three biological treatments with different modes of action. Methods Investigator-initiated, randomised, blinded-assessor study. Patients with treatment-naive early RA with moderate-severe disease activity were randomised 1:1:1:1 to methotrexate combined with (1) active conventional therapy: oral prednisolone (tapered quickly, discontinued at week 36) or sulfasalazine, hydroxychloroquine and intra-articular glucocorticoid injections in swollen joints; (2) certolizumab pegol; (3) abatacept or (4) tocilizumab. Coprimary endpoints were week 48 Clinical Disease Activity Index (CDAI) remission (CDAI <= 2.8) and change in radiographic van der Heijde-modified Sharp Score, estimated using logistic regression and analysis of covariance, adjusted for sex, anticitrullinated protein antibody status and country. Bonferroni's and Dunnet's procedures adjusted for multiple testing (significance level: 0.025). Results Eight hundred and twelve patients were randomised. Adjusted CDAI remission rates at week 48 were: 59.3% (abatacept), 52.3% (certolizumab), 51.9% (tocilizumab) and 39.2% (active conventional therapy). Compared with active conventional therapy, CDAI remission rates were significantly higher for abatacept (adjusted difference +20.1%, p<0.001) and certolizumab (+13.1%, p=0.021), but not for tocilizumab (+12.7%, p=0.030). Key secondary clinical outcomes were consistently better in biological groups. Radiographic progression was low, without group differences. Conclusions Compared with active conventional therapy, clinical remission rates were superior for abatacept and certolizumab pegol, but not for tocilizumab. Radiographic progression was low and similar between treatments.
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| 19. |
- Parsonage, Jackie, et al.
(författare)
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An exploration of occupational choices in adolescence : A constructivist grounded theory study
- 2022
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Ingår i: Scandinavian Journal of Occupational Therapy. - : Informa UK Limited. - 1103-8128 .- 1651-2014. ; 29:6, s. 464-481
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Tidskriftsartikel (refereegranskat)abstract
- Background: Adolescence is a critical period within the life course, for developing adult occupational competencies and health behaviours. Few studies have considered how 16–17 year olds choose activities and behaviours from an occupational perspective. Aim and objectives: To explore how adolescents aged 16–17 years old make choices about their daily occupations to inform a theoretical model of occupational choice. Materials and methods: About 27 secondary school students aged 16–17 years attended one of six focus groups. Transcripts were analyzed using constructivist grounded theory, informing the iterative development of a theoretical model of occupational choice. Results: Adolescent occupational choice occurred in response to experiencing needs, and was characterized by ‘weighing up’ and ‘juggling’ the following four key domains: ‘Appraising values and priorities’, ‘Interacting with the situational context’, ‘Exploring skills and occupational repertoire’ and ‘Considering time factors’. A developing sense of responsibility and autonomy for occupational choices was described, leading to the development of the future occupational self. Conclusions and significance: A theory illuminating how adolescents make choices was developed. The theory aligns with existing developmental literature and provides unique insights, from an occupational science perspective, on the conscious process by which adolescents make, develop and adapt choices about the occupations they do considering contextual and individual opportunities and constraints.
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| 20. |
- Persson, Carina, 1964, et al.
(författare)
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Greening of the brown-dwarf desert EPIC 212036875b: a 51 M-J object in a 5-day orbit around an F7V star
- 2019
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Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 628
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Tidskriftsartikel (refereegranskat)abstract
- Context. Although more than 2000 brown dwarfs have been detected to date, mainly from direct imaging, their characterisation is difficult due to their faintness and model-dependent results. In the case of transiting brown dwarfs, however, it is possible to make direct high-precision observations. Aims. Our aim is to investigate the nature and formation of brown dwarfs by adding a new well-characterised object, in terms of its mass, radius and bulk density, to the currently small sample of less than 20 transiting brown dwarfs. Methods. One brown dwarf candidate was found by the KESPRINT consortium when searching for exoplanets in the K2 space mission Campaign 16 field. We combined the K2 photometric data with a series of multicolour photometric observations, imaging, and radial velocity measurements to rule out false positive scenarios and to determine the fundamental properties of the system. Results. We report the discovery and characterisation of a transiting brown dwarf in a 5.17-day eccentric orbit around the slightly evolved F7V star EPIC 212036875. We find a stellar mass of 1.15 +/- 0.08 M-circle dot, a stellar radius of 1.41 +/- 0.05 R-circle dot, and an age of 5.1 +/- 0.9 Gyr. The mass and radius of the companion brown dwarf are 51 +/- 2 M-J and 0.83 +/- 0.03 R-J, respectively, corresponding to a mean density of 108(-13)(+15) g cm(-3). Conclusions. EPIC 212036875 b is a rare object that resides in the brown-dwarf desert. In the mass-density diagram for planets, brown dwarfs, and stars, we find that all giant planets and brown dwarfs follow the same trend from similar to 0.3 M-J to the turn-over to hydrogen burning stars at similar to 73 M-J. EPIC 212036875 b falls close to the theoretical model for mature H/He dominated objects in this diagram as determined by interior structure models. We argue that EPIC 212036875 b formed via gravitational disc instabilities in the outer part of the disc, followed by a quick migration. Orbital tidal circularisation may have started early in its history for a brief period when the brown dwarf's radius was larger. The lack of spin-orbit synchronisation points to a weak stellar dissipation parameter (Q(star)' greater than or similar to 10(8)), which implies a circularisation timescale of greater than or similar to 23 Gyr, or suggests an interaction between the magnetic and tidal forces of the star and the brown dwarf.
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| 21. |
- Subjak, Jan, et al.
(författare)
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TOI-503: The First Known Brown-dwarf Am-star Binary from the TESS Mission
- 2020
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Ingår i: Astronomical Journal. - : American Astronomical Society. - 1538-3881 .- 0004-6256. ; 159:4
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Tidskriftsartikel (refereegranskat)abstract
- We report the discovery of an intermediate-mass transiting brown dwarf (BD), TOI-503b, from the TESS mission. TOI-503b is the first BD discovered by TESS, and it has circular orbit around a metallic-line A-type star with a period of P.=.3.6772.+/-.0.0001 days. The light curve from TESS indicates that TOI-503b transits its host star in a grazing manner, which limits the precision with which we measure the BD's radius ( = R 1.34+ R b 0.150.26 J). We obtained highresolution spectroscopic observations with the FIES, Ondr.ejov, PARAS, Tautenburg, and TRES spectrographs, and measured the mass of TOI-503b to be Mb.=.53.7.+/-.1.2 MJ. The host star has a mass of Ma.=.1.80.+/-.0.06Me, a radius of Ra.=.1.70.+/-.0.05Re, an effective temperature of Teff.=.7650.+/-.160 K, and a relatively high metallicity of 0.61.+/-.0.07 dex. We used stellar isochrones to derive the age of the system to be 180 Myr, which places its age between that of RIK 72b (a 10 Myr old BD in the Upper Scorpius stellar association) and AD 3116b (a 600 Myr old BD in the Praesepe cluster). Given the difficulty in measuring the tidal interactions between BDs and their host stars, we cannot precisely say whether this BD formed in situ or has had its orbit circularized by its host star over the relatively short age of the system. Instead, we offer an examination of plausible values for the tidal quality factor for the star and BD. TOI-503b joins a growing number of known short-period, intermediate-mass BDs orbiting mainsequence stars, and is the second such BD known to transit an A star, after HATS-70b. With the growth in the population in this regime, the driest region in the BD desert (35-55MJ sin i) is reforesting.
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| 22. |
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| 23. |
- Watz, Johan, 1977-, et al.
(författare)
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Atlantic salmon in regulated rivers: Understanding river management through the ecosystem services lens
- 2022
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Ingår i: Fish and Fisheries. - : John Wiley & Sons. - 1467-2960 .- 1467-2979. ; 23:2, s. 478-491
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Tidskriftsartikel (refereegranskat)abstract
- Known as the “king of fishes”, the Atlantic salmon (Salmo salar, Salmonidae) is an iconic freshwater species whose contribution to human wellbeing has long been recognized, as have widespread declines in its abundance, partly due to river regulation. To understand how salmon conservation has been addressed within the ecosystem services (ES) framework, we synthesized the peer-reviewed literature on ES provided by salmon in regulated rivers. We developed a search string to capture allusions to provisioning, regulating, supporting and cultural ES and assessed the results to identify knowledge gaps. The effects of hydropower on fisheries catches and on modelled populations were shown is several publications. Overall, few studies focused explicitly on ES from salmon and hydropower; this is surprising given the considerable body of literature on salmon in regulated rivers. Wild salmon as a food source and other provisioning services are less important today than historically. Because predators such as salmon are important for facilitating biodiversity by cycling nutrients and controlling food webs, there is a scope of work for future assessments of these regulating and supporting services. Few papers explicitly addressed cultural ES, despite the salmon’s longstanding iconic status; this is a knowledge gap for future ES assessments in relation to hydropower. The influence of ES assessments for policy makers is growing through the Intergovernmental Panel for Biodiversity and Ecosystem Services (IPBES) and the post-2020 biodiversity strategy. Explicitly addressing ES poses an opportunity for river managers to raise awareness of aquatic conservation efforts and well-informed decision-making for sustaining ES.
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| 24. |
- Watz, Johan, 1977-, et al.
(författare)
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Social behaviour of European grayling before and after flow peaks in restored and unrestored habitats
- 2020
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Ingår i: Rivers Research and Applications. - : John Wiley & Sons. - 1535-1459 .- 1535-1467. ; 36:8, s. 1646-1655-
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Tidskriftsartikel (refereegranskat)abstract
- Cost‐effective implementation of fish‐friendly hydropower flow operation and habitat restoration measures require an understanding of their effects on fitness‐related behaviours of stream fish. Here, we investigated how changes in flow and bottom structure influence the social behaviour of European grayling, using large experimental flumes (700 L s−1), with and without added boulders (i.e., restored and unrestored habitat). Grayling increased their distance to nearest neighbour at the start of flow ramping up and after a flow peak compared to stable base flow. At the start of ramping up the flow, grayling made less position changes (movements >1 m) than at stable base flow and after a flow peak. In the unrestored habitat, the proportion of time grayling spent actively swimming was lower before a flow peak than it was both at the start of ramping up the flow and after the peak, an effect not found in the restored habitat. In addition, we compared two static flows, and habitat restoration mediated their effect on distance to nearest neighbour. Grayling in the restored habitat were positioned closer to each other in the low (~10 cm s−1) than in the intermediate static flow (~40 cm s−1), whereas in the unrestored habitat, grayling showed the opposite pattern. Moreover, grayling reduced their number of position changes in the intermediate static flow, which was reflected by a reduction in active swimming. Stomach analysis after the trials revealed that foraging success was higher in variable than in the stable flow treatment. These results show that flow magnitude, flow changes and instream structure play important roles in the behaviour of stream fishes.
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| 25. |
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