1,721,058 research outputs found
Applicazione dei laser scanner terrestri in campo agro-forestale e ambientale
Full text linkLe tecniche di laser scanning terrestre suscitano un interesse sempre più crescente sia in campo ambientale sia in campo agro-forestale in quanto consentono un’acquisizione rapida e affidabile di nuvole di punti 3D in grado di rappresentare tridimensionalmente gli oggetti rilevati. In un lasso di tempo relativamente breve, tali tecniche hanno aperto la strada ad un ampio spettro di applicazioni in pieno campo. Al di là della misura interattiva di nuvole georeferenziate di punti, le tecniche per il rilevamento automatizzato di oggetti, la determinazione delle loro caratteristiche geometriche e l’analisi della risposta del segnale laser rappresentano temi di ricerca prioritari. L’elevata qualità delle nuvole di punti 3D generate dai sistemi di laser scanning insieme alla possibilità di automatizzare le successive post-elaborazioni dei dati hanno esteso il potenziale applicativo dei laser scanner terrestri anche ai settori ambientali e agro-forestali. Questo contributo illustra innanzitutto lo stato dell’arte dei sistemi laser scanner terrestri dal punto di vista tecnologico e discute le diverse soluzioni tecnologiche e i diversi parametri di sistema in relazione alle possibili applicazioni in campo ambientale e forestale. Nella seconda parte saranno invece presentati alcuni casi di studio esplicativi delle potenzialità e delle limitazioni operative della tecnica di laser scanning terrestre in campo ambientale e agro-forestale.Terrestrial laser scanning techniques find rapidly growing interest in both environmental and agro-forestry fields as efficient tools for fast and reliable 3D point data acquisition and 3D representation of the object viewed by the scanners. They have opened a wide range of application fields within a rather short period of time. Beyond interactive measurement in 3D point clouds, techniques for the automatic detection of objects, the determination of geometric parameters, and the analysis of the reflectance signal form high priority research issues. The high quality of 3D point clouds generated by laser scanners and the data process automation potential make terrestrial laser scanning also an interesting tool for environmental and agro-forestry applications. The paper will first review current laser scanner systems from a technological point of view and discuss different scanner technologies and system parameters regarding their suitability for environmental and agro-forestry applications. In the second part of the paper, results of case studies on potentials and limitations of terrestrial laser scanners in environmental and agro-forestry fields will be presented
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
GHG emissions inventory at urban scale: the Sassari case study
Full text linkWithin current initiatives dedicated to provide information on the status of greenhouse gases emissions, the town of Sassari represents a pilot site for estimating the net exchange of carbon dioxide (emissions and sinks) at municipal level in Sardinia (Italy). A spatial and temporal high resolution greenhouse gas emissions inventory for the urban area of Sassari is currently under construction in line with European and international standard protocols to establish a baseline for tracking emission trends. This paper presents the preliminary results of the development of a simplified local emissions inventory where estimates of the atmospheric emissions are collected and cataloged by type of greenhouse gases, productive activity and emissive source on annual basis
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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