1,721,064 research outputs found
A preliminary assessment of carbon dioxide emissions from apricot orchard
No full textThis study reports the CO2 soil flux recorded in February and May in an apricot orchard. Emissions were assessed throughout 8 chambers connected to a non-dispersive infra-red CO2 detector (PP System, model SBA-4). The mean daily CO2 fluxes fluctuated from approximately 0.22 (February) to 1.24 g m-2 h-1 (May). The spatial variability of CO2 lost by the “row” and the “inter-row” soil fraction and the influence of air temperature are discussed. This preliminary note highlights that investigations on soil CO2 emissions are urgent in order to construct a realistic carbon budget in such ecosystems
Calcolo del volume di suolo interessato dall'irrigazione e della relativa quantità di acqua immagazzinabile
No full text
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
L’impronta del carbonio nella produzione di vino nel Sud Italia in due tipologie di coltivazione
No full textThe study reports the carbon footprint (CF) of a 0.75 L red wine bottle calculated considering the carbon fluxes at field, winery, packing and distribution stages. Two production systems were compared: sustainable (organic fertilization, no-tillage) and conventional (mineral fertilization, tillage). We assessed a CF equal to 0.03 kg C for each bottle for the sustainable production while it was 1.0 kg C for the conventional.Based on the incidence of each stage on the CF, it emerges that field operations are of great significance in terms of CF
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
- …
