1,721,003 research outputs found
Worldwide plant purchase on the internet
No full textGefährliche Pflanzenschädlinge können durch den Internethandel weltweit verbreitet werden. Informieren Sie sich vor dem Kauf von Pflanzen- und Pflanzenteilen von außerhalb der Europäischen Union, was zu beachten ist, um fatale Folgen für die Wirtschaft und unsere Ökosysteme zu vermeiden. Bitte achten Sie auf Pflanzengesundheit.Dangerous plant pests can be spread worldwide through Internet trade. Before buying plants and plant parts from outside the European Union, find out what you need to know to avoid fatal consequences for the economy and our ecosystems. Please pay attention to plant health
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Phytosanitäre Aspekte der anaeroben Behandlung und Verwertung von Bioabfällen und pflanzlichen Biomassen
No full textSoil and biowaste as potential pathways for invasive alien species, and regulatory approaches to minimize the risks
No full textSoil, growing medium and biowaste of plant origin may be a pathway for the introduction and spread of harmful organisms of plants like nematodes, soil-borne pathogens and invasive alien plants. In the European Union (EU) biowaste of plant origin is more and more collected separately from other waste and after a biological treatment (composting and anaerobic digestion) used as organic fertilizer in agriculture and horticulture.
An analysis of the EU Plant Health Directive 2000/29/EC revealed that import prohibitions and specified import requirements for soil and growing medium with their origins in Third Countries (non-EU countries) seem to be effective tools against invasive alien species as well as quarantine pests. In contrast, the spread of harmful species already established in parts of the EU is not prevented on the basis of the present rules. However, in so far as invasive alien species harmful to plants are concerned, the EU plant health regulations provide the basis for future action.
An appropriate measure for minimizing the risks of biowaste would be a sanitization treatment. Harmonized legislation does not exist. Since national regulations on waste as far as they exist differ between the countries a harmonized approach is recommended
EPPO-Ad hoc Panel on the Phytosanitary Risks of Composted Organic Waste, 28./29. November 2000 in Göttingen
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