1,720,979 research outputs found
Effect on intestinal transit of neurotensin administered intracerebroventricularly to rats.
No full text
Cerebral sites of central action of dermorphin on intestinal motility in the rat.Peptides. 1985;6 Suppl 3:149-53
No full textAttività di maschi di volpe Vulpes vulpes (L.) in relazione alle risorse alimentari in un’area costiera mediterranea
No full textGoing 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
Rock composition and water quality of San Pedro Sula area (Honduras).
No full textA multidisciplinary study was carried out, within the "Estudio
Para La Proteccion Ambiental Del Acuifero Del Valle De Sula Y De
Las Fuentes De Agua De La Reserva Forestal Del Merendon'' plan,
focused on the appraisal and management of the water resources in
San Pedro Sula area (Honduras).
This paper deals with the hydrochemical study which is of great
significance for the comprehension of the hydrogeological system.
The aim is to highlight the relationship between the rock composition
of the ground water recharge basin and the quality of the alluvial terrain
aquifer.
The aquifer is contained between alluvial sediments of the San
Pedro Sula plain; these sediments, in the areas in contact with the
Merendon mountain chain, comprise mainly alluvial fans generated
by material transported by the rivers; the apical area of these fans is
characterised by high permeability and is the site of a free monostrate
aquifer. Moving towards the more distal fan areas, depressed areas of
fine sedimentation (silt and clay) appear; the permeability of the sediments
is very low and the aquifer divides into a more superficial one
and a deeper one; the latter was found to be under slight pressure.
Regarding the ground water recharge basin, represented by the
Merendon mountain chain, this includes rocks in various degrees of
metamorphism, intrusive rocks, anatectic products and hydrothermal
products characterised by permeability through fracturing.
The rocks of the ground water recharge basin and the scour of the
pedogenetic layer have determined the present water quality and the
soils and palaeosoils composition of the later alluvial sediment deposition.
Bicarbonate-alkaline waters characterised by a specific electric
conductivity <100 μS cm-1 are linked to intrusive rocks and anatectic
products of the Zapot al river. These waters have a short underground
watercourse. Calcium bicarbonate waters with specific electric
conductivity >1000 μS cm-1, observed in Aldea El Carmen area,
are connected to the dissolution of secondary calcite. This calcite is
considered being the product of precipitation from carbonatic schists
involved in granitic pluton intrusions. Deep alkaline-bicarbonate
waters, warm in some cases, have a pH of 10. Sulphate-chlorinealkaline
waters with pH around 4, occurs in the Manchaguala river
basin, and are linked to sulphates produced by oxidation of metallic intrusulphurs formed at the margin of the pluton by hydrothermal processes
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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