1,720,993 research outputs found
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
Navigating on the past, as a bird flight, at the territorial scale of historical topographic maps. WMS on the “Corografie delle Province del Regno Lombardo-Veneto”, for accessing cadastral map catalogue
No full textThe research presented here has developed within the project "Atl@s of historical cadastral and topographic maps of Lombardy (2009-2011)" funded by 'Fondazione Cariplo', involving 'Politecnico di Milano - BEST Dept.' (project leader), 'Archivio di Stato di Milano', 'Agenzia del Territorio', 'Centro Studi PIM', 'Regione Lombardia', 'Comune di Gorgonzola' (partners). The first release of the geo-portal (www.atlantestoricolombardia.it), has been presented to the public on 19th January 2010 after a year's work. Conceived in the form of a modern Atl@s, it has been designed with a double level access to the historical cadastral series available by ASMi ('Catasto Teresiano', 'Lombardo Veneto', 'Cessato Catasto'), together with samples of 'Impianto in conservazione' by AdT (Italian Cadastral Administration): besides a catalogue approach level based on classical research keys (the application, Divenire©, has been inherited by ASMi from the Archive of Venice), an open geographic level has been implemented by the research group of Politecnico, with ongoing functionalities, based on a territorial regional basis, obtained experimenting and georeferencing small scale topographic maps, principally here focused on the historical chorographic maps. The methodologies, the reliability and feasibility of the georeferenced output, and the overall potentiality to use them as a gate to access the local scale represented by the spread diffusion of the cadastral series, are the topics discussed. Due to the high number of historical cadastral sheets, the generation of a systematic GeoDB on the local cadastral series - with a rigorous georeferencing method, already documented within the research - shall be faced by government policies and by algorithm automation, to become sustainable in the next years, in terms of time and costs. Thus, in the meantime, few functionalities are being tested to allow an agile user access, based on a geographic approach to the non georeferenced sheets, straightening the immediate content of the geographic language to a large public demand, respect to the simple key queries, through Web Mapping Services (WMS) developed on the small scale map: ASMi is going to share - over this project through the portal - more than 28.000 sheet units, that can find a challenge in the geographic fruition. Flying the territory of the past with the small scale synthesis, its political assets and physical elements, such as the hydrographic network, can offer interesting thematic cultural opportunities to knowledge dissemination of 'our territory' and its preservation
Definition of the 3D content and geometric level of congruence of numeric cartography
No full textLectur Notes in Geoinformation and Cartograph
L'introduzione della variabile tempo nei modelli dati/metadati per applicazioni di protezione civile
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
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
Semi-Automatic Objects Recognition in Urban Areas Based on Fuzzy Logic
No full text3D Urban current representation contains many data lack in correspondence of complex features. The integration of qualitative and quantitative data within a cognitive process is here exprerimented within urban district scale.
An important issue is to apply the typical human process which allows to recognize objects in a range image in a fuzzy reasoning process. The investigations presented here have given a first demonstration of the capability of this approach.
Three dimensional object extraction and recognition (OER) from geographic data has been definitely one of more important topic in photogrammetry for quite a long time. Today, the capability of rapid generating high-density DSM increases the supply of geographic information but the discrete nature of the measuring makes more difficult to recognize correctly and to extract 3D objects from these surface. The proposed methodology wants to semi-automate some geographic objects clustering operations, in order to perform the recognition process. The clustering is a subjective process; the same set of data items often needs to be partitioned differently based on the application. Fuzzy logic gives the possibility to use in a mathematical process the uncertain information typical of human reasoning. The concept at the base of our proposal is to use the information contained in Image Matching or LiDAR DSM, and typically understood by the human operator, in a fuzzy recognition process able to combine the different input in order to perform the classification. So the object recognition approach proposed in our workflow integrates 3D structural descriptive components of objects, extracted from DSM, into a fuzzy reasoning process in order to exploit more fully all available in-formation, which can contribute to the extraction and recognition process and, to handling the object’s vagueness. The recognition algorithm has been tested with to different data set and different objectives
- …
