| 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. |
- Jones, Daniel O.B., et al.
(författare)
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Environment, ecology, and potential effectiveness of an area protected from deep-sea mining (Clarion Clipperton Zone, abyssal Pacific)
- 2021
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Ingår i: Progress in Oceanography. - : Elsevier BV. - 0079-6611. ; 197:September-October 2021
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Tidskriftsartikel (refereegranskat)abstract
- To protect the range of habitats, species, and ecosystem functions in the Clarion Clipperton Zone (CCZ), a region of interest for deep-sea polymetallic nodule mining in the Pacific, nine Areas of Particular Environmental Interest (APEIs) have been designated by the International Seabed Authority (ISA). The APEIs are remote, rarely visited and poorly understood. Here we present and synthesise all available observations made at APEI-6, the most north eastern APEI in the network, and assess its representativity of mining contract areas in the eastern CCZ. The two studied regions of APEI-6 have a variable morphology, typical of the CCZ, with hills, plains and occasional seamounts. The seafloor is predominantly covered by fine-grained sediments, and includes small but abundant polymetallic nodules, as well as exposed bedrock. The oceanographic parameters investigated appear broadly similar across the region although some differences in deep-water mass separation were evident between APEI-6 and some contract areas. Sediment biogeochemistry is broadly similar across the area in the parameters investigated, except for oxygen penetration depth, which reached >2 m at the study sites within APEI-6, deeper than that found at UK1 and GSR contract areas. The ecology of study sites in APEI-6 differs from that reported from UK1 and TOML-D contract areas, with differences in community composition of microbes, macrofauna, xenophyophores and metazoan megafauna. Some species were shared between areas although connectivity appears limited. We show that, from the available information, APEI-6 is partially representative of the exploration areas to the south yet is distinctly different in several key characteristics. As a result, additional APEIs may be warranted and caution may need to be taken in relying on the APEI network alone for conservation, with other management activities required to help mitigate the impacts of mining in the CCZ.
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| 3. |
- Alonso-Blanco, Carlos, et al.
(författare)
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1,135 Genomes Reveal the Global Pattern of Polymorphism in Arabidopsis thaliana
- 2016
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Ingår i: Cell. - : Elsevier. - 0092-8674 .- 1097-4172. ; 166:2, s. 481-491
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Tidskriftsartikel (refereegranskat)abstract
- Arabidopsis thaliana serves as a model organism for the study of fundamental physiological, cellular, and molecular processes. It has also greatly advanced our understanding of intraspecific genome variation. We present a detailed map of variation in 1,135 high-quality re-sequenced natural inbred lines representing the native Eurasian and North African range and recently colonized North America. We identify relict populations that continue to inhabit ancestral habitats, primarily in the Iberian Peninsula. They have mixed with a lineage that has spread to northern latitudes from an unknown glacial refugium and is now found in a much broader spectrum of habitats. Insights into the history of the species and the fine-scale distribution of genetic diversity provide the basis for full exploitation of A. thaliana natural variation through integration of genomes and epigenomes with molecular and non-molecular phenotypes.
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| 4. |
- Bhutani, Naveen, et al.
(författare)
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Energy assessment of Paper Machines
- 2012
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Ingår i: Energy Procedia. - : Elsevier. - 1876-6102. ; 14, s. 955-963
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Tidskriftsartikel (refereegranskat)abstract
- There is a large value in making Pulp and Paper mills more energy efficient. ABB has developed an energy assessment service where opportunities to save energy in the paper machine are identified. The energy assessment is done by quantifying energy flows, benchmarking energy users, data mining and steam sensitivity analysis and by experiments and additional measurements at the paper machine. Energy quantification helped in identifying main energy consumer, benchmarking was useful to assess the gap between operating performance and best performance whereas data mining and steam sensitivity analysis helped in studying the impact of key operating variables on performance of paper machines. After the assessment an action plan was presented to the mill for energy efficiency improvement together with a return on investment.
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| 5. |
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| 6. |
- Forsberg, Camilla, 1983-, et al.
(författare)
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Fever pitch: spatial, material, and temporal organisational dimensions of gendered peer relations on the school football pitch
- 2023
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Ingår i: Ethnography and Education. - : ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD. - 1745-7823 .- 1745-7831. ; 18:2, s. 183-198
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Tidskriftsartikel (refereegranskat)abstract
- We investigate the importance of spatial, material, and organisational factors to gendered peer relations on the school football pitch. The study is part of an ethnographic research project exploring the relations between school bullying and the institutional context of schooling, focusing on the perspectives of teachers and pupils from preschool class up to grade eight (approximately ages 5-13). The findings in this study are based on participant observations and semi-structured interviews with pupils at three schools in Sweden. Our findings illustrate how social-ecological elements of spatial, material, and organisational factors such as school design, the material construction of the pitches, and the temporal organisation of the space through scheduling promote gendered positioning and fevered interactions which influence peer relations and sometimes contribute to degrading treatment, harassment and bullying. Our study demonstrates how these processes need to be understood as complexly related to social-ecological factors beyond the football pitch setting.
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| 7. |
- Forsberg, Camilla, 1983-, et al.
(författare)
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How school-built factors and organisational dimensions contribute to bodily exposure, degrading treatment and bullying in school changing rooms
- 2024
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Ingår i: Sport, Education and Society. - : ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD. - 1357-3322 .- 1470-1243.
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Tidskriftsartikel (refereegranskat)abstract
- This paper explores how school-built factors and organisational dimensions contribute to bodily exposure, degrading treatment and bullying in school changing rooms. The findings in this study stem from an ethnographic research project exploring the relations between school bullying and the institutional context of schooling. The project focuses on the perspectives of teachers and pupils from pre-school class up to grade eight (i.e. approx. ages 5-15). In this particular study, we focus on participant observations and semi-structured interviews conducted at three elementary schools and one lower secondary school in Sweden.Analysis of the data was guided by constructivist grounded theory (Charmaz, 2014) [Constructing grounded theory (2nd ed.). Sage].Findings reveal how the changing room was a vulnerable and unsafe space associated with an ever-present fear of experiencing bodily exposure, degrading treatment, and bullying. Our findings illuminate how social-ecological elements such as the physical design of the space and organisational factors such as staffing and scheduling can both increase and decrease the risk of experiencing bodily exposure, degrading treatment, and bullying in the changing room. This demonstrates that much more consideration needs to be given to how social interactions and experiences within school changing rooms are influenced by school-built factors and the ways in which they are organised within the different social-ecological systems beyond the microsystem setting.
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