1,720,988 research outputs found
PIXE ANALYSIS TO STUDY METAL DIFFUSION AND SEDIMENTATION PHENOMENA IN VENICE LAGOON
No full textA chemical procedure to prepare thin targets from surface water, pore water and leached sediment samples for PIXE analysis is performed and applied to Venice lagoon system study
PIXE ANALYSIS OF WATERS IN CHECKING POLLUTANT TRANSFER IN SHALLOW WATERS
No full textHeavy metal concentration, mesured by means of PIXE technique in sea water samples, are used as a "tracer" for a transefr modelling
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
PALUDE DI CONA: CIRCOLAZIONE IDRICA E TRASPORTO DEI METALLI PESANTI
No full textViene presentata una sintesi dei principali risultati ottenuti nello studio della circolazione idrica e del comportamento dei metalli pesanti nella palude di Cona (Laguna di Venezia)
A filtration system for the size separation of fresh water samples
No full textA system to filter freshwater samples in situ in the field is described, using polycarbonate membranes. It was developed and tested with respect to the conventional filtration method, both for its efficiency and for the effect on for its efficiency and for the effect on heavy metal concentrations in the filtrates. A marked reduction of filtration time is obtained and the possibility to carry out one stage filtrations that otherwise would need the filter to be changed. PIXE analysis generally shows an increase of heavy metal concentrations in the filtrates; this is accompanied by a smaller data spread in sub-samples obtained by repeated filtrations, indicating a higher capability in maintaining the nominal membrane pore size during operations, which produces a better dimensional selection. The system is suitable to perform immediate filtration of numerous fresh water samples to be treated in heavy metal pollution assessments
INVESTIGATION ON DISSOLVED AND SUSPENDED HEAVY METALS OF THE DESE RIVER (VENICE LAGOON)
No full textTHE INVESTIGATION ON DISSOLVED AND SUSPENDED HEAVY METALS OF THE DESE RIVER (VENICE LAGOON) DEREMINED BY PIXE IS DESCRIBE
Useful tracer parameters to investigate the environmental conditions in areas of the Venice Lagoon
No full textINDAGINE PRELIMINARE SULLA DISTRIBUZIONE DEI METALLI PESANTI NELL'ACQUA INTERSTIZIALE DEI SEDIMENTI DELLA PALUDE DI CONA (LAGUNA DI VENEZIA)
No full textIL LAVORO DESCRIVE L'INDAGINE PRELIMINARE SVOLTA CON LA TECNICA PIXE SULLA DISTRIBUZIONE DEI METALLI PESANTI NELL'ACQUA INTERSTIZIALE DEI SEDIMENTI DELLA PALUDE DI CONA (LAGUNA DI VENEZIA
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
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