1,720,970 research outputs found
La cartografia pedologica nella pianificazione territoriale: l’esempio della provincia dio Napoli.
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
Andosuoli e colate rapide di fango in Campania: valutazioni pedologiche per la mitigazione del rischio
No full textVariations 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
Catalytic combustion of methane and propane in a fluidized-bed reactor
No full textFluidized bed combustion of premixed lean methane- and propane-air mixtures over a copper based catalyst has been studied. Fluidization behaviour of the catalyst particles, 1 mm diameter, is that typical of the B-D group of the Geldart classification of powders. Combustion experiments have been performed in a 0.10 m fluidized bed reactor with unexpanded bed height of 0.10 and 0.20 m. The influence of temperature (in the range 300 to 700°C), of gas superficial velocity, of the catalyst loading on the degree of fuel conversion has been assessed.
A model of the fluidized bed combustor has been developed, based on the two-phase fluidization theory. The model has been particularized to the limiting case of low-temperature kinetic-controlled combustion rate in order to assess parameters of the intrinsic combustion kinetics from experimental data. Good agreement between model computations and experimental results is obtained throughout the range of operating variables investigated. The cooperative role of intrinsic kinetics and of intraparticle and interphase (bubble-to-emulsion phase, emulsion phase-to-catalyst particle) diffusional resistances is adequately taken into account. Model simulations have been further directed to highlight the controlling conversion regimes in the range of operating variables investigated
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
REMOVAL OF ORGANIC POLLUTANTA FROM SOIL: THE OZONATION OF CLOFIBRIC ACID IN AQUEOUS SLURRIES
No full text- …
