1,720,984 research outputs found
Effects of solar radiation on regeneration patterns in a Nothofagus dombeyi (Mirb.) Oerst. old-growth forest in Chile’s central-southern Andes
No full textBringing ecosystem services into forest planning – Can we optimize the composition of Chilean forests based on expert knowledge?
No full textIn the following paper, we use robust optimization to calculate portfolios of Chilean forest stands which minimize the greatest underperformance among all considered ecosystem services (ES) and biodiversity. Forest experts were asked to score the six most important ES indicators and biodiversity for forest stands with either exotic or native tree species. Average scores and their variation were used to form an optimal forest portfolio (proportions of the five stand types). Quantitative indicators of ES were used to calculate the reference portfolio. Portfolios based on expert opinions (49% Eucalyptus plus Pinus, 51% native Nothofagus and mixed Pseudotsuga) did not differ significantly from portfolios based on quantitative indicators (51% Eucalyptus plus Pinus, 49% Nothofagus, mixed Pseudotsuga and Acacia). Both portfolios offer good protection against low achievement levels and prevent the degradation of important ES and biodiversity, while pure stands showed low achievement levels for specific ES. We conclude that integrating expert knowledge into forest planning may well support considering ES and biodiversity. Forest owners in the Mediterranean region of Chile should be encouraged to integrate native Nothofagus species into their forest portfolios to better provide for multiple ES and the conservation of biodiversity
Elementos de ecología aplicada en el manejo del bosque nativo
Full text linkpáginas 36-40Las consideraciones y proposiciones de este trabajo se refieren al caso del plan de manejo forestal según el Art. 22, letra c, de la nueva Ley de Bosque Nativo, es decir a actividades silviculturales destinadas a manejar y recuperar bosques nativos para fines de producción maderer
Establecimiento supervivencia y crecimiento en un ensayo con tres especies nativas sometidas a diferentes condiciones de luz, en valle nonguen, región del Bio Bío, Chile
No full textx, 53 hojas : ilustraciones, gráficos, diagrama
Bosques Seminaturales: una opción para la rehabilitación de bosques degradados
No full text166 páginas : gráficos, ilustracione
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
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