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Censimento degli Ardeidi in Val Polcevera (Genova).
No full textA census was carried out along the Polcevera and Verde Streams from
December 2006 to December 2007 in order to examine the abundance of
Ardeidae. Seven species have been observed: Grey Heron (Ardea cinerea),
Little Egret (Egretta garzetta), Great White Egret (Casmerodius albus), Night
Heron (Nycticorax nycticorax), Squacco Heron (Ardeola ralloides), Cattle
Egret (Bubulcus ibis), Purple Heron (Ardea purpurea). The Grey Heron is
constantly present in the area and it is the most abundant species; moreover it is
the only one breeding in the area. The Little Egret is constantly present too,
resulting rather frequent during the migrations, but less abundant in winter and
summer. The Great White Egret is much less abundant and, differently from the
previous species, it has been observed in the examined area only during the
wintering period and sporadically during the spring migration. The other
species of Ardeidae have been seldom observed, generally during the prenuptial
migration. In addition to the census along the streams, the main Herons’
roosting site in the Polcevera Valley has been monitored from December 2007
to May 2008. The data collected by this last method resulted useful since they
have proved the effectiveness of the census along the streams for the Little
Egret and the Great White Egret and they allow to assess the real abundance of
the Cattle Egret, which can’t be correctly counted by means of the census along
the streams, because of the eco-ethology of this species
3D REPRESENTATION OF BIOSTRUCTURES IMAGED WITH AN OPTICAL MICROSCOPE .A. DIGITAL OPTICAL SECTIONING .B. 3D GRAPHIC REPRESENTATION
No full textA method for acquiring and processing 3D information from biological specimens imaged with an optical microscope is presented. It is physically based on optical sectioning microscopy, and utilizes a set of digital filters implemented for deblurring optical section images. Rather than the provision of an exact solution for the problem, we have found of more practical use a new approximate method that significantly improves the situation, within reasonable cost parameters
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
IMAGO: a complete system for acquisition, processing, two/three-dimensional and temporal display of microscopic bio-images.
No full textThis work describes IMAGO, an integrated bio-imaging system developed in our laboratory. The whole system consists of a personal computer, a commercially available frame grabber directly plugged into a personal computer, video input/output modules, specific hardware for z-axis movement and light shuttering, and a software package. IMAGO is user-friendly, menu driven and enables one to perform image acquisition with different methods: optical sectioning, flashing epifluorescence, transmitted and phase contrast microscopy. It makes various functions possible, including: image transfer, gray scale processing, conventional and advanced filtering, logical operations, look-up table management, three-dimensional (3D) editing, 3D representation and auto-correlation techniques. More than 100 image processing functions have been implemented and can be easily managed through IMAGO. Examples are given in the area of biophysical research, like 3D representation of nuclei and of electron microscopic images, in situ microscopy of living cells. IMAGO processes information in an x, y, z, t space
Idiopatic macular hole: Correlation between optical coherence tomography findings and scanning laser ophthalmoscope mircoperimery data
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