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Sökning: WFRF:(Tomasi Chiara)

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1.
  • Aloisio, Angelo, et al. (författare)
  • Vibration issues in timber structures : A state-of-the-art review
  • 2023
  • Ingår i: Journal of Building Engineering. - 2352-7102. ; 76
  • Forskningsöversikt (refereegranskat)abstract
    • The increasing use of timber structures worldwide has brought attention to the challenges posed by their lightweight nature, making them more prone to vibrations than more massive structures. Consequently, significant research efforts have been dedicated to understanding and mitigating vibrations in timber structures, while scientific committees strive to establish suitable design regulations. This study aims to classify and identify the main research themes related to timber structure vibrations and highlight future research needs and directions. A bibliometric-based selection process briefly introduces each research topic, presenting the latest findings and proposals for vibration design in timber structures. The paper emphasizes the key outcomes and significant contributions to understanding and addressing vibration issues in timber structures. These findings serve as valuable guidance for researchers, designers, and regulatory bodies involved in designing and assessing timber structures subjected to vibrations.
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2.
  • Pertl, Leonhard, et al. (författare)
  • Exports and Productivity : Comparable Evidence for 14 Countries
  • 2007
  • Ingår i: Policy Research Working Papers. - New York : World Bank. - 1813-9450.
  • Rapport (refereegranskat)abstract
    • The authors use comparable micro level panel data for 14 countries and a set of identically specified empirical models to investigate the relationship between exports and productivity. The overall results are in line with the big picture that is by now familiar from the literature: Exporters are more productive than non-exporters when observed and unobserved heterogeneity are controlled for, and these exporter productivity premia tend to increase with the share of exports in total sales; there is strong evidence in favour of self-selection of more productive firms into export markets, but nearly no evidence in favour of the learning-by-exporting hypothesis. The authors document that the exporter premia differ considerably across countries in identically specified empirical models. In a meta-analysis of their results the authors find that countries that are more open and have more effective government report higher productivity premia. However, the level of development per se does not appear to be an explanation for the observed cross-country differences.
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