1,720,980 research outputs found
Banca Dati e SIT dei rilievi geomatici eseguiti nelle zone di Sarno. 98
No full textIn aree colpite da eventi catastrofici sono generalmente richiesti interventi di tipo geomatico per fornire informazioni sullo stato di fatto, sui rischi residui, sulla viabilità, sulla localizzazione dei danni.
In emergenza tali interventi possono essere eseguiti da operatori appartenenti a Strutture differenti, in condizioni di estrema urgenza e cercando di raggiungere il prima possibile i risultati più importanti che consentano una immediata analisi del fenomeno e di programmare al meglio possibile gli interventi da intraprendere. Il rischio è che i dati acquisiti non vengano raccolti ordinatamente in un unico centro e che quindi le elaborazioni vadano disperse tra i diversi soggetti intervenuti durante e dopo l’emergenza.
Per questo motivo, in relazione alla emergenza verificatasi a Sarno e in comuni limitrofi, è stata realizzata a cura del DISTART dell’Università di Bologna una Banca Dati che consenta la catalogazione dei principali interventi di tipo geomatico effettuati sull’area a seguito della catastrofe del 1998. Tali interventi sono stati di vario tipo: una rete di inquadramento nel Sistema Nazionale; rilievi di dettaglio (con strumenti integrati, stazioni motorizzate a risposta diretta, GPS statico e cinematico); vettorializzazione della cartografia tecnica esistente; prese fotogrammetriche; successivamente rilievi con Laser Scanner aviotrasportato (ed elaborazione di immagini digitali acquisite contemporaneamente al volo); immagini satellitari ad alta risoluzione.
Particolarmente faticosa è stata la fase di recupero e di archiviazione delle misure e dei dati , come pure la necessaria completa omogeneizzazione dei dati per ricondurli allo stesso sistema di riferimento.
Per poter permettere l’accesso alle informazioni in modo rapido e semplice da parte dei potenziali interessati al recupero dei dati, è stata realizzata una prima versione di un SIT utilizzando software di larga diffusione come ArcView GIS 3.2 e Access 2000.
È stato implementato un primo insieme di strumenti per l’accesso, la selezione e la visualizzazione dei dati suddivisi in viste distinte secondo la tecnica di rilievo utilizzata e l’area interessata (area frane e area alveo). E’ stato inoltre considerata una estensione verso la eventuale gestione di dati quali quelli derivanti da rilievo LIDAR di aste fluviali
An enriched ePub eBook for screen reader users
No full textOur study aims at obtaining ePub accessibility for all, including screen reader users. Since an ePub document is made up of several (X)HTML files, we analysed and worked with those (X)HTML tags that affect the blind user's experience in the reading. As a case study we developed an "enriched" ePub book which applies technical solutions (i.e. tags and attributes) with the purpose to overcome the accessibility and usability issues observed when interacting via screen reader. In this work we present the results collected through an online survey conducted with 25 users to evaluate the "enriched" ePub compared with the original PDF format in terms of accessibility and usability. Positive responses about the proposed solutions emerged from the survey: the easy access to the table of content, to the images, to the text and also the ease of navigation. In short, 88 % of the users preferred the ePub format instead of the PDF. This confirms that quite simple technical solutions can really improve the reading experience for not only visually impaired people. The results from the survey also showed accessibility issues and limitations of the screen readers and eBook reader software which still exist
Esperienze Laser Scanner terrestre nell’ambito della conservazione dei beni culturali e archeologici.
No full text
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
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
Investigating an accessible and usable epub book via VoiceOver: a case study
No full textIn this paper we investigate the opportunities and limitations for blind and visually impaired people when reading an ePub document via Voice-Over for mobile devices. The ePub format is based on an (x)html structure; organizing and handling its source code is therefore very important in order to guarantee satisfactory interaction with the eBook. In this work we analyze the main accessibility and usability issues when interacting with an ePub document via VoiceOver, in order to evaluate possible solutions to source code difficulties. We have considered several accessibility requirements for the use of eBooks in order to focus on the potential technical solutions which were evaluated. From this perspective, we considered two eBooks in order to apply our methodology. Comments and suggestions were provided by eight blind users who evaluated the eBooks via iPhone and iPad devices
Regional disparities in the sensitivity of well-being to poverty measures
No full textConsumption, poverty and happiness represent fundamental aspects in the analysis of household living conditions. Empirical evidence proposed in literature suggests a strong relationship between poverty and subjective wellbeing, usually mediated by contextual and regional characteristics. Despite this awareness a full understanding of the mechanism of affection of the context to the relationship is still lacking. In this study, we provide a deep analysis of the regional disparities influencing the poverty-subjective wellbeing nexus using Italian household matched data for 2016. In particular, we suggest estimating poverty-SWB models at the macro-area level to account for heterogeneity in the populations, not fully controlled by territorial macro variables. We also improve previous literature by exploiting the multidimensionality in the concept of SWB and poverty, by using economic and social measures of SWB and differ poverty indicators. Findings depict significant differences in the SWB-poverty nexus, especially when the economic life satisfaction is considered
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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