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Sökning: WFRF:(Schneider T.)

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991.
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992.
  • Martin, P., et al. (författare)
  • Overview of the RFX fusion science program
  • 2011
  • Ingår i: Nuclear Fusion. - : IOP Publishing. - 0029-5515 .- 1741-4326. ; 51:9, s. 094023-
  • Tidskriftsartikel (refereegranskat)abstract
    • This paper summarizes the main achievements of the RFX fusion science program in the period between the 2008 and 2010 IAEA Fusion Energy Conferences. RFX-mod is the largest reversed field pinch in the world, equipped with a system of 192 coils for active control of MHD stability. The discovery and understanding of helical states with electron internal transport barriers and core electron temperature >1.5 keV significantly advances the perspectives of the configuration. Optimized experiments with plasma current up to 1.8 MA have been realized, confirming positive scaling. The first evidence of edge transport barriers is presented. Progress has been made also in the control of first-wall properties and of density profiles, with initial first-wall lithization experiments. Micro-turbulence mechanisms such as ion temperature gradient and micro-tearing are discussed in the framework of understanding gradient-driven transport in low magnetic chaos helical regimes. Both tearing mode and resistive wall mode active control have been optimized and experimental data have been used to benchmark numerical codes. The RFX programme also provides important results for the fusion community and in particular for tokamaks and stellarators on feedback control of MHD stability and on three-dimensional physics. On the latter topic, the result of the application of stellarator codes to describe three-dimensional reversed field pinch physics will be presented.
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993.
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994.
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995.
  • Mitchell, R F, et al. (författare)
  • The diversity and evolution of odorant receptors in beetles (Coleoptera)
  • 2020
  • Ingår i: Insect Molecular Biology. - : Wiley. - 1365-2583 .- 0962-1075. ; 29:1, s. 77-91
  • Tidskriftsartikel (refereegranskat)abstract
    • The insect odorant receptors (ORs) are amongst thelargest gene families in insect genomes and the primarymeans by which insects recognize volatile compounds.The evolution of ORs is thus instrumental inexplaining the chemical ecology of insects and as amodel of evolutionary biology. However, althoughORs have been described from numerous insect species,their analysis within and amongst the insectorders has been hindered by a combination of limitedgenomic information and a tendency of the OR familytoward rapid divergence, gain, and loss. We addressedthese issues in the insect order Coleoptera through atargeted genomic annotation effort that included 1181ORs from one species of the sister order Strepsipteraand 10 species representing the four coleopteran suborders.The numbers of ORs in each species variedfrom hundreds to fewer than 10, but coleopteran ORscould nevertheless be represented within a schemeof nine monophyletic subfamilies. We observed manyradiations and losses of genes amongst OR subfamilies,and the diversity of ORs appeared to parallel thehost breadth of the study species. However, somesmall lineages of ORs persisted amongst many coleopteranfamilies, suggesting receptors of key functionthat underlie the olfactory ecology of beetles.
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996.
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999.
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1000.
  • Motapon, O., et al. (författare)
  • Advances in the MQDT approach of electron/molecular cation reactive collisions : High precision extensive calculations for applications
  • 2015
  • Ingår i: DR2013. - : EDP Sciences.
  • Konferensbidrag (refereegranskat)abstract
    • Recent advances in the stepwise multichannel quantum defect theory approach of electron/molecular cation reactive collisions have been applied to perform computations of cross sections and rate coefficients for dissociative recombination and electron-impact rovibrational transitions of H-2(+), BeH+ and their deuterated isotopomers. At very low energy, rovibronic interactions play a significant role in the dynamics, whereas at high energy, the dissociative excitation strongly competes with all other reactive processes.
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