1,720,958 research outputs found
Mapping different forms of mobility in the Milan urban region
No full textThe increase in urban mobility is one of the key issues of contemporary cities. The need for new types of data and representations useful to describe the new forms of daily urban mobility is widely known. The wider urban scale – named urban region – is the scale at which most of the urban and socio-economical phenomena are visible. Urban growth patterns, settlements and activities distribution, demographics and economics dynamics can be fully understood and interpreted at this macro scale, which is not recognizable on the administrative boundaries. The aim of this paper is to present three approaches to mobility mapping based on different data sources, both traditional and innovative, for the Milan urban region (Northern Italy). Traditional sources for the analysis of daily mobility are Census data or surveys based on interviews to mobile populations. They provide a very partial picture of the mobility practices in urban areas, because they collect only flows for job and study purposes. Innovative sources of data are mobile phone activity data that have been used for building a sequence of mobility maps in a typical working day. The Main Map is therefore composed of two parts: a representation of systematic and non-systematic mobility in the Milan urban region; and a sequence of maps created by using telephone traffic data showing daily mobility patterns. These maps can provide useful information for understanding the recent changes that had occurred in the Milan urban region, but they can also offer a methodological reference for the analysis of mobility in general
Informazioni geografiche per il governo del territorio. L’uso di software open source per la gestione della cartografia comunale: l’esperienza dei comuni della provincia di Lecco.
No full textIl presente articolo intende documentare un’esperienza di collaborazione tra il Politecnico di Milano (Dipartimento di Architettura e Pianificazione – Laboratorio di Analisi Dati e Cartografia), la Provincia di Lecco (Settore Territorio) e i comuni della provincia di Lecco nella gestione di cartografia digitale multiscala del territorio attraverso l’uso del Database Topografico (DBT) e di software GIS open source (QGis e gvSIG). La formazione e sensibilizzazione all’uso del DBT, si è resa necessaria poiché la nuova cartografia richiedeva conoscenze specifiche che, mediamente, non erano disponibili presso gli Enti locali coinvolti nel progetto. Si sono pertanto organizzati due corsi di formazione sull’utilizzo del DBT. Le attuali risorse degli enti locali e la volontà di sperimentare le potenzialità delle tecnologie Open Source per la gestione di dati complessi, sono i principali fattori che hanno condotto a tale scelta. Queste attività di formazione sono integrate con la realizzazione di un manuale operativo specifico all’uso del DBT con il software gvSIG
Preliminary findings on application of mobile phone data analysis to urban studies
No full textIn recent years, a new approach for estimating people's movement in cities through mobile
phone traffic analysis has been developed. Compared to the traditional methods of urban
surveys, the use of aggregated and anonymous cellular network log files appears to be a
promising tool for large-scale studies with notably smaller efforts and costs
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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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