Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2013
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Ievina SturiteAbstract
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Ievina SturiteAbstract
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Nils Egil SøvdeAbstract
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Abstract
When calculating the Bandt and Pompe ordinal pattern distribution from given time series at depth D, some of the D! patterns might not appear. This could be a pure finite size effect (missing patterns) or due to dynamical properties of the observed system (forbidden patterns). For pure noise, no forbidden patterns occur, contrary to deterministic chaotic maps. We investigate long time series of river runoff for missing patterns and calculate two global properties of their pattern distributions: the Permutation Entropy and the Permutation Statistical Complexity. This is compared to purely stochastic but long-range correlated processes, the k-noise (noise with power spectrum f−k), where k is a parameter determining the strength of the correlations. Although these processes closely resemble runoff series in their correlation behavior, the ordinal pattern statistics reveals qualitative differences, which can be phrased in terms of missing patterns behavior or the temporal asymmetry of the observed series. For the latter, an index is developed in the paper, which may be used to quantify the asymmetry of natural processes as opposed to artificially generated data.
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Liv SolemdalAbstract
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Martha EbbesvikAbstract
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Grete Lene Serikstad Anne-Kristin Løes Emma Brunberg Lise Grøva Håvard Steinshamn Kristin SørheimAbstract
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Lampros LamprinakisAbstract
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Lampros LamprinakisAbstract
Changes in the institutional and market environments can present new challenges for organizations. The ability to properly and adequately change and adapt to these new conditions can be crucial for organizations’ competitiveness and their long-term survival. The article offers a qualitative case study analysis on the transformation process of the biggest Finnish dairy organization, Valio, in the light of the country’s accession to the EU. The analysis is based on thirteen personal in-depth semi-structured interviews with management employees, executives, past directors and industry insiders. The examination covers several aspects of the organization’s efforts to adapt with a particular focus on processes, strategies, and transition stages, and thus provides invaluable insight that allows the better understanding of a successful transformation.