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- Lindquist, T., et al.
(författare)
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A novel modular and dispatchable CSP Stirling system : Design, validation, and demonstration plans
- 2019
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Ingår i: AIP Conference Proceedings. - : American Institute of Physics (AIP).
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Konferensbidrag (refereegranskat)abstract
- This paper summarizes the preliminary results from the on-going development of a novel modular dispatchable solar power plant concept. The work encompasses techno-economic feasibility assessment, concept design, full scale sub-system tests and validation work, and ultimately plans for a fully integrated demonstration of the system. The proposed solar power plant concept consists of a heliostat field that powers a latent heat thermal energy storage (TES), fitted on a small tower. The solar receiver located underneath the TES tank, is an optical cavity with a small aperture that enables the concentrated sunlight to be emitted directly on the solar absorber surface while ensuring low convective and radiative losses. The stored thermal energy is provided to the engine, in proximity to the latent heat storage, with a pumped heat transfer fluid (HTF). The Stirling engine with a rated power of 13 kW has been modified and optimised for the operational conditions that the eutectic aluminum-silicon latent heat storage provides. For example, a new engine tubular gas heater has been developed for the HTF (i.e. sodium) and the expansion cylinder has been enlarged to improve both efficiency and power output as the temperature of the working gas is somewhat lower than in previous dish Stirling application. The choice of eutectic aluminum-silicon as TES media resulted from a thorough assessment of several phase change materials throughout the design phase of the project. Indeed, such a TES media selected would benefit from a suitable melting temperature of around 580°C, high energy density, high thermal conductivity, and low cost.
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- Bowers, Robert M., et al.
(författare)
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Minimum information about a single amplified genome (MISAG) and a metagenome-assembled genome (MIMAG) of bacteria and archaea
- 2017
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Ingår i: Nature Biotechnology. - : NATURE PUBLISHING GROUP. - 1087-0156 .- 1546-1696. ; 35:8, s. 725-731
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Tidskriftsartikel (refereegranskat)abstract
- We present two standards developed by the Genomic Standards Consortium (GSC) for reporting bacterial and archaeal genome sequences. Both are extensions of the Minimum Information about Any (x) Sequence (MIxS). The standards are the Minimum Information about a Single Amplified Genome (MISAG) and the Minimum Information about a Metagenome-Assembled Genome (MIMAG), including, but not limited to, assembly quality, and estimates of genome completeness and contamination. These standards can be used in combination with other GSC checklists, including the Minimum Information about a Genome Sequence (MIGS), Minimum Information about a Metagenomic Sequence (MIMS), and Minimum Information about a Marker Gene Sequence (MIMARKS). Community-wide adoption of MISAG and MIMAG will facilitate more robust comparative genomic analyses of bacterial and archaeal diversity.
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- Hedlund, M., et al.
(författare)
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The disciplining of self-help : Doing self-help the Norwegian way
- 2019
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Ingår i: Social Science and Medicine. - : Elsevier BV. - 0277-9536 .- 1873-5347. ; 225, s. 34-41
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Tidskriftsartikel (refereegranskat)abstract
- We explore how Norwegian self-help groups are defined and managed to create a particular form of health system governmentality. Self-help groups are typically framed as therapeutic communities where participants define the agenda creating a space where open and equal interaction can produce individual learning and personal growth. In Norway, however, self-help groups are managed in a way that integrates them in to the health system but insulates them from clinical medicine; an approach that disciplines participants to act in a particular way in relation to the health system. We draw on the analysis of 1456 pages of public documents and websites from the National Nodal Point for Self-Help (NPSH), the organisation that manages self-help groups, and central government including individual testimonies from participants published between 2006 and 2014. We argue, drawing on Foucault, that self-help premised on lay-leadership and self-determination is at odds with the centrally defined regulation apparent in the model adopted in Norway and an example of disciplining that reinforces health system governmentality and serves the interests of the medical profession and the state. Further we propose that this illustrates the contestation between the pastoral power of medics, the National Nodal Point for Self-Help and the Ministry of Health. Our analysis of Norwegian self-help as a mechanism to create a particular form of health system governmentality helps explain the expansion of self-help and self-management within developed health systems and provides an explanation for why self-help within health systems, is typically situated adjacent to, rather than integrated into, clinical medicine.
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