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Sökning: WFRF:(Lohaus D)

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1.
  • Saunders, C. N., et al. (författare)
  • Thermal expansion and phonon anharmonicity of cuprite studied by inelastic neutron scattering and ab initio calculations
  • 2022
  • Ingår i: Physical Review B. - : AMER PHYSICAL SOC. - 2469-9950 .- 2469-9969. ; 105:17
  • Tidskriftsartikel (refereegranskat)abstract
    • Inelastic neutron scattering measurements were performed with a time-of-flight chopper spectrometer to observe phonons in all parts of the Brillouin zone of a single crystal of cuprite Cu2O. We reduced the experimental data to phonon dispersions in the high-symmetry directions, and changes between 10 and 300 K are reported. In this paper, we show ab initio quasiharmonic (QH) and anharmonic (AH) calculations of phonon dispersions. We performed all AH calculations with a temperature-dependent effective potential method. Both QH and AH calculations account for the small negative thermal expansion of cuprite at low temperatures. However, the measured temperature-dependent phonon behavior was predicted more accurately with the AH calculations than the QH ones. Nevertheless, at 300 K, the cubic AH used in this paper did not entirely account for the experimental phonon dispersions in cuprite.
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2.
  • Ruhle, S A, S A, et al. (författare)
  • “To work, or not to work, that is the question” : Recent trends and avenues for research on presenteeism
  • 2020
  • Ingår i: European Journal of Work and Organizational Psychology. - 1359-432X .- 1464-0643. ; 29:3, s. 344-363
  • Tidskriftsartikel (refereegranskat)abstract
    • This position paper brings together recent and emerging developments in the field of presenteeism. A critical synthesis of the evidence is needed due to persisting conceptual and methodological challenges as well as the increased volume of research in the field.This paper integrate semerging evidence and critical thinking into three areas: (1) concept, (2) measurement and methodological issues, and (3) the context of presenteeism. First, due to the variety of existing definitions, competing understandings, as well as the notion of positive presenteeism, it is important to reconsider the notion of presenteeism. Second, it is important to reflect on the measurement of the act of presenteeism and the productivity loss associated with that. Third,following the call to investigate presenteeism in specific contexts,it is important to explain the social, occupational, cross-cultural aspects, as well as the contemporary workplace changes. Based on this critical synthesis, we conclude by identifying recommendations for future research on presenteeism.
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