| 1. |
- Abel, I, et al.
(författare)
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Overview of the JET results with the ITER-like wall
- 2013
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Ingår i: Nuclear Fusion. - : IOP Publishing. - 1741-4326 .- 0029-5515. ; 53:10, s. 104002-
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Tidskriftsartikel (refereegranskat)abstract
- Following the completion in May 2011 of the shutdown for the installation of the beryllium wall and the tungsten divertor, the first set of JET campaigns have addressed the investigation of the retention properties and the development of operational scenarios with the new plasma-facing materials. The large reduction in the carbon content (more than a factor ten) led to a much lower Z(eff) (1.2-1.4) during L- and H-mode plasmas, and radiation during the burn-through phase of the plasma initiation with the consequence that breakdown failures are almost absent. Gas balance experiments have shown that the fuel retention rate with the new wall is substantially reduced with respect to the C wall. The re-establishment of the baseline H-mode and hybrid scenarios compatible with the new wall has required an optimization of the control of metallic impurity sources and heat loads. Stable type-I ELMy H-mode regimes with H-98,H-y2 close to 1 and beta(N) similar to 1.6 have been achieved using gas injection. ELM frequency is a key factor for the control of the metallic impurity accumulation. Pedestal temperatures tend to be lower with the new wall, leading to reduced confinement, but nitrogen seeding restores high pedestal temperatures and confinement. Compared with the carbon wall, major disruptions with the new wall show a lower radiated power and a slower current quench. The higher heat loads on Be wall plasma-facing components due to lower radiation made the routine use of massive gas injection for disruption mitigation essential.
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| 2. |
- Augustine, Lilly, 1979-, et al.
(författare)
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The Role of Disability in the Relationship Between Mental Health and Bullying: A Focused, Systematic Review of Longitudinal Studies
- 2022
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Ingår i: Child Psychiatry & Human Development. - : Springer Science and Business Media LLC. - 0009-398X .- 1573-3327.
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Forskningsöversikt (refereegranskat)abstract
- Having both a disability and being bullied increases the risk of later mental health issues. Children with disabilities are at greater risk of being bullied and therefore at greater risk of adverse mental health outcomes. We conducted a limited systematic review of longitudinal studies focusing on the role of disability in relation to bullying and mental health problems. Twelve studies with an initial measure of mental health or disorder, measured no later than 10 years of age, were found. Ten of these twelve studies suggested that having a disability before victimisation increased the impact of mental health problems measured after bullying experiences. The conclusion is that children with a disability, such as behavioural problems, have an increased risk of later mental health problems through bullying victimization. Children with two risk factors had significantly worse mental health outcomes. These additional mental health problems may be alleviated through reduced bullying victimisation.
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| 3. |
- Barrett, Damon, et al.
(författare)
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Best interests and low thresholds: legal and ethical issues relating to needle and syringe services for under 18s in Sweden
- 2022
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Ingår i: Harm Reduction Journal. - : Springer Science and Business Media LLC. - 1477-7517. ; 19:1
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Tidskriftsartikel (refereegranskat)abstract
- Access for legal minors to needle and syringe programmes raises a number of practical, legal and ethical challenges that traverse clinical practice, child protection and child rights. This article addresses the current legal age restriction on access to needle and syringe programmes (NSPs) in Sweden. Based on legislation and legislative preparatory works, it traces the rationale for retaining an age restriction in the context of a policy priority to improve access for people who inject drugs. Building on threshold theory and child rights literature, the article unpacks the apparent tension between protecting the low threshold nature of service provision, child protection duties of healthcare staff, and the best interests of the child. It explores whether this tension could be alleviated through replacing a legal age restriction for all with best interests assessments for each individual, and discusses the potential ethical and practical challenges involved in such a change.
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| 4. |
- Barrett, Damon, et al.
(författare)
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Child-centred harm reduction
- 2022
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Ingår i: International Journal of Drug Policy. - : Elsevier BV. - 0955-3959 .- 1873-4758. ; 109
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Tidskriftsartikel (refereegranskat)abstract
- Harm reduction has become increasingly influential in drug policy and practice, but has developed primarily around adult drug use. Theoretical, practical, ethical and legal issues pertaining to children and adolescents under the age of majority – both relating to their own use and the effects of drug use among parents or within the family – are less clear. This commentary proposes a sub-field of drug policy at the intersection of harm reduction and childhood which we refer to as ‘child-centred harm reduction’. We provide a definition and conceptual model, as well as illustrative questions that emerge through a child-centred harm reduction lens. Many people in different countries are already working on these kinds of issues, whose work needs greater recognition, analysis and support. In beginning to name and define this sub-field we hope to improve this situation, and inspire further international debate, collaboration, and innovation.
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| 5. |
- Bjereld, Ylva, 1984, et al.
(författare)
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The association between self-reported psychosomatic complaints and bullying victimisation and disability among adolescents in Finland and Sweden
- 2023
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Ingår i: Scandinavian Journal of Public Health. - : SAGE Publications. - 1403-4948 .- 1651-1905. ; 51:8, s. 1136-1143
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Tidskriftsartikel (refereegranskat)abstract
- Aim: To analyse the associations between bullying victimisation, disability, and self-reported psychosomatic complaints in adolescents, and to investigate the role of support from parents and teachers in such associations. Methods: The study was based on Finnish and Swedish data from two waves (2013/2014 and 2017/2018) of the Health Behaviour in School-aged Children survey (n=16,057). Descriptive statistics were produced for four groups of adolescents: (a) bullied with disabilities; (b) not bullied with disabilities; (c) bullied without disabilities; and (d) not bullied without disabilities (reference group). Two multilevel multinomial logistic regression models were performed for the Finnish and Swedish samples separately. The first model analysed associations between psychosomatic complaints and bullying victimisation, controlling for a range of confounders. The second model analysed associations between psychosomatic complaints and social support from parents and teachers. Results: Across both countries, bullied adolescents with disabilities were more likely to self-report psychosomatic complaints than the reference group, even after adjusting for other potential confounders. Teacher support was identified as a potential protective factor as the odds ratio for psychosomatic complaints decreased when including teacher support as a factor in the model. The association with parent support showed mixed findings in Finland and Sweden. Conclusions: Disability in combination with bullying victimisation generated the highest levels of self-reported psychosomatic complaints compared to adolescents that were not bullied nor had disabilities. High teacher support may be a protective factor against psychosomatic complaints for bullied and/or disabled adolescents.
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| 6. |
- Forkby, Torbjörn, 1965, et al.
(författare)
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Cannabisanvändning bland ungdomar
- 2013
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Rapporten sammanfattar kunskapsläget inom cannabisområdet från publikationer inom MOB-projektet, olika myndigheter samt en forskningsöversikt kring preventiva insatser för ungdomar.
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| 7. |
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| 9. |
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| 10. |
- Romanelli, F, et al.
(författare)
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Overview of the JET results
- 2011
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Ingår i: Nuclear Fusion. - : IOP Publishing. - 1741-4326 .- 0029-5515. ; 51:9
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Tidskriftsartikel (refereegranskat)abstract
- Since the last IAEA Conference JET has been in operation for one year with a programmatic focus on the qualification of ITER operating scenarios, the consolidation of ITER design choices and preparation for plasma operation with the ITER-like wall presently being installed in JET. Good progress has been achieved, including stationary ELMy H-mode operation at 4.5 MA. The high confinement hybrid scenario has been extended to high triangularity, lower ρ*and to pulse lengths comparable to the resistive time. The steady-state scenario has also been extended to lower ρ*and ν*and optimized to simultaneously achieve, under stationary conditions, ITER-like values of all other relevant normalized parameters. A dedicated helium campaign has allowed key aspects of plasma control and H-mode operation for the ITER non-activated phase to be evaluated. Effective sawtooth control by fast ions has been demonstrated with3He minority ICRH, a scenario with negligible minority current drive. Edge localized mode (ELM) control studies using external n = 1 and n = 2 perturbation fields have found a resonance effect in ELM frequency for specific q95values. Complete ELM suppression has, however, not been observed, even with an edge Chirikov parameter larger than 1. Pellet ELM pacing has been demonstrated and the minimum pellet size needed to trigger an ELM has been estimated. For both natural and mitigated ELMs a broadening of the divertor ELM-wetted area with increasing ELM size has been found. In disruption studies with massive gas injection up to 50% of the thermal energy could be radiated before, and 20% during, the thermal quench. Halo currents could be reduced by 60% and, using argon/deuterium and neon/deuterium gas mixtures, runaway electron generation could be avoided. Most objectives of the ITER-like ICRH antenna have been demonstrated; matching with closely packed straps, ELM resilience, scattering matrix arc detection and operation at high power density (6.2 MW m-2) and antenna strap voltages (42 kV). Coupling measurements are in very good agreement with TOPICA modelling. © 2011 IAEA, Vienna.
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