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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Authors
Fuad Gasi Silvio Simon Naris Pojskic Mirsad Kurtovic Ivan Pejic Mekjell Meland Clive KaiserAbstract
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Bark beetles cause widespread damages in the coniferous-dominated forests of central Europe and North America. In the future, areas affected by bark beetles may further increase due to climate change. However, the early detection of the bark beetle green attack can guide management decisions to prevent larger damages. For this reason, a field-based bark beetle monitoring program is currently implemented in Germany. The combination of remote sensing and field data may help minimizing the reaction time and reducing costs of monitoring programs covering large forested areas. In this case study, RapidEye and TerraSAR-X data were analyzed separately and in combination to detect bark beetle green attack. The remote sensing data were acquired in May 2009 for a study site in south-west Germany. In order to distinguish healthy areas and areas affected by bark beetle green attack, three statistical approaches were compared: generalized linear models (GLM), maximum entropy (ME) and random forest (RF). The spatial scale (minimum mapping unit) was 78.5 m2. TerraSAR-X data resulted in fair classification accuracy with a cross-validated Cohen’s Kappa Coefficient (kappa) of 0.23. RapidEye data resulted in moderate classification accuracy with a kappa of 0.51. The highest classification accuracy was obtained by combining the TerraSAR-X and RapidEye data, resulting in a kappa of 0.74. The accuracy of ME models was considerably higher than the accuracy of GLM and RF models.
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Randi Seljåsen Kjell gjermund Vogt Elisabeth Olsen Per Lea Lars Arne Høgetveit Torgeir Taje Richard Meadow Gunnar BengtssonAbstract
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Authors
Simon Ballance Stefan Sahlstrøm Per Lea Nina Elisabeth Nagy Petter V. Andersen Tzvetelin Dessev Sarah Hull Maria Vardakou Richard FaulksAbstract
This is a post-peer-review, pre-copyedit version of an article published in [European Journal of Nutrition]. The final authenticated version is available online at: https://doi.org/10.1007/s00394-012-0386-5
Authors
Lampros LamprinakisAbstract
Valio, a well-established "national institution" in Finland, had a rich background based on cooperative tradition and extensive regional spread. In the late 1980s and early 1990s, the company had to undergo a process of change and re-organization in order to address the challenges arising from the EU accession. After years of restructuring and changing in its business model, Valio remains a major player in Finland and one of the most well-known brands in the region. The purpose of this case study is to stimulate a critical evaluation of the processes Valio undertook in order to address the coming challenges. The case is especially suited as a starting point for a broader discussion on organizational change and adaptation. Teaching notes are provided with proposals and questions.
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Authors
Ole Petter Laksforsmo Vindstad Tino Schott Snorre Hagen Jane Uhd Jepsen Lauri Teemu Kapari Rolf Anker ImsAbstract
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