1,721,015 research outputs found
Entrevista com as professoras Maria Cecília de Magalhães Mollica e Maria da Conceição Auxiliadora Paiva
Full text linkThis interview is a celebration to our dearest Cecília Mollica and Conceição Paiva, to sociolinguistic studies in Brazil and to PPGLIN/UFRJ, which has the privilege of having these professors as part of its teaching staff.Esta entrevista é uma celebração às nossas queridas Cecília Mollica e Conceição Paiva, aos estudos de sociolinguística no Brasil e ao PPGLIN/UFRJ, que tem o privilégio de contar com essas professoras como parte de seu corpo docente
First report of Leiochrides australis Augener, 1914 (Polychaeta, Capitellida) from the Mediterranean Sea and notes on the genus Leiochrides
No full textNUMERICAL STUDY OF HYDROGEN MILD COMBUSTION
No full textIn this article a combustor burning hydrogen and air in mild regime is numerically studied by means of computational fluid dynamic simulations. All the numerical results show a good agreement with experimental data. It is seen that the flow configuration is characterized by strong exhaust gas recirculation with high air preheating temperature. As a consequence, the reaction zone is found to be characteristically broad and the temperature and concentrations fields are sufficiently homogeneous and uniform, leading to a strong abatement of nitric oxide emissions. It is also observed that the reduction of thermal gradients is achieved mainly through the extension of combustion in the whole volume of the combustion chamber, so that a flame front no longer exists ("flameless oxidation"). The effect of preheating, further dilution provided by inner recirculation and of radiation model for the present hydrogen/air mild burner are analyzed
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
Notes on the reproduction of the cardinalfish Apogon imberbis from lachea Island, Central mediterranean, Sicily, Italy
No full textThe cardinal fish Apogon imberbis (Linnaeus, 1758) is a common species in the
Mediterranean sea but its reproductive biology is poorly known. Here we present information
on the duration of the breeding season, the daily activity pattern and the mating behaviour of
A . i m b e r b i s in the field, recorded in an Italian Marine Protected Area (Catania, Sicily). Mouthbrooding
males were observed from July to September. Courtship behaviour was recorded
throughout the day, however its highest frequency, as well as spawning, occurred at sunset. T h e
abundance of cardinal fish varied during the study period, reaching a peak during the breeding
season, when individuals exhibit site fidelity. Observations of mouthbrooding males and collection
of egg masses allowed to estimate that parental cares last for 5 to 7 days, and brood size is
around 4000-6000 eggs
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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