1,721,219 research outputs found
Digital aerophotogrammetric techniques for vehicle counting in urban areas
No full textSummary form only given, as follows. Urban traffic numeric simulations are currently performed on the base of a relatively little knowledge, since field vehicle data collection is expensive and limited in both space and time. On the other hand, aerial stereoscopic photography allows detection of vehicles simultaneously and over large areas. However, extracting vehicle information from pictures in an urban context, while filtering-out undesirable features at the ground, is a difficult task: in this work we propose and implement an innovative processing method for vehicle identification and counting. So aerial pictures could be used to effectively improve mathematical traffic model output. The methodology can be easily applied over the whole road-network at a relatively low cost and fast data collection time. © 2001 IEEE
Image convolutions by quadrics Q1
No full textAimed to evaluate the image processing capabilities of the massively parallel computer Quadrics Q1, a convolution algorithm have been implemented that is described in this report. At first the discrete convolution mathematical definition is recalled together with the main Q1 h/w and s/w features. Then the different codification forms of the algorithm are described and the Q1 performances are compared with those obtained by different computers. Finally, the conclusions report on main results and suggest © Springer-Verlag Berlin Heidelberg 1996
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
Porta, L. & Martínez, C. Pasiones; Roberto Kuri. Mar del Plata: EUDEM, 2014
No full textReseña de: Porta, L. & Martínez, C. Pasiones; Roberto Kuri. Mar del Plata: EUDEM, 201
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
A geospatial decision support tool for seismic risk management: Florence (Italy) case study
No full textSeismic risk assessment, which attempts to predict earthquake-induced physical impacts on structures and infrastructures, casualties and losses can be a powerful tool to support emergency response planning as well as the development of effective mitigation strategies. The Civil Protection (CP) Department of Florence Municipality commissioned this study as historical earthquakes showed an appreciable seismic risk for the city that needed careful civil protection planning. A Decision Support System DSS (CIPCast-ES) developed by ENEA, APIC Lab, in the framework of the EU-funded project CIPRNet, was used to simulate the seismic and impact scenarios for two major historical earthquakes felt in Florence, to assess the earthquake-induced damage at single building level, and the relative expected consequences on population. The possibility to account for the seismic microzonation (i.e. the possible amplification of the seismic hazard and therefore of the expected impacts due to soil conditions) was also included within DSS. The results of the scenario analysis, presented in the paper in tabular format, were provided to the CP of Florence Municipality as queryable, interactive and end-user friendly web-version maps. © Springer International Publishing AG 2017
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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