1,720,987 research outputs found
Analisi dei dati ASTER per la mappatura dei suoli e della temperatura superificiale nella Provincia di Taranto
No full textNella presente nota si descrive lo studio, in atto, su immagini satellitari ad alta risoluzione del sensore ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer).La ricerca si basa su analisi di carattere ambientale mediante l’interpretazione di dati digitali satellitari, per la stesura di mappe tematiche relative alla distribuzione della LST (Land Surface Temperature), ovvero delle anomalie termiche, nonché all’uso del suolo, alle dinamiche di trasformazione del suolo, ecc.
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
Applications of Terra MODIS data for Iraq marshland monitoring
No full textSince the 1970s, the Iraq Marshlands have been damaged significantly, but recently (May 2003-March 2004), more than 20% of the original marshland area has been re-flooded.The goal of the work is to observe the evolution of the marshes in terms of extension and to evaluate the success of wetland restoration on the base of multispectral and multitemporal MODIS images collected in 2007-2008.MODIS (MODerate resolution Imaging Spectroradiometer) has a viewing swath width of 2,330 km and views the entire surface of the Earth every one to two days. Its detectors measure 36 spectral bands between 0.405 and 14.385 μm, and it acquires data at three spatial resolutions -- 250m, 500m, and 1,000m.These data with their low spatial resolution but high time frequency are suitable for regional-scale time-series studies.The satellite data have been corrected for atmospheric effects using an IDL (Interactive Data Language) procedure based on MODTRAN and 6S radiative transfer codes. These radiative transfer codes require, in input, atmospheric vertical profiles, aerosol optical thickness(AOT) and columnar water vapour content (WV). Vertical profiles are obtained from the nearest meteorological station or by climatological data set. AOT and WV are retrieved either from the MODIS MODATML2 atmospheric product, or from the AERONET (Aerosol robotic network).Then different classifications (Pixel- and Object-Oriented) have been tested, compared and discussed to evaluate the best approach to apply on regional-scale time-series studie
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
Limiti all’esercizio del potere di autotutela sul consenso prestato in sede di conferenza di servizi
No full textIn face of a request submitted by a Public Authority who partecipated to the conference and who intends to withdraw too late the consent that it previously gave, the competent Authority has the obligation to take all appropriated measure to eliminate the reason of European Community irregularity of a measure, that was adopted in the absence of EIA. However, when the act is illegitimate because in conflict with a rule of law, the review obligation flows from the principle of loyal cooperation ex article 97 of Constitution
Sand Liquefaction Phenomena Induced by the 2012 Pianura Padana Emiliana Earthquake: Geomorphological Features of and Relation with Building Stability
No full textIn May 2012, a large area of the Po river plain between the provinces of Ferrara and Modena was affected by a strong seismic event with magnitude greater than 5 (6.1 peak). This portion of the alluvial plain hosts many urban centres and industrial production activities, workshops and intensive farming. This paper describes these phenomena and their relationship with the stability of buildings. In the urban and suburban centres as well as in rural areas, the earthquake caused the collapse of buildings and surface fracturing with sand liquefaction; this phenomenon occurs when a saturated soil devoid of cohesion passes rapidly from solid to liquid state, in conjunction with a strong earthquake. The sand bodies leaked from underground as large flows affecting the agricultural areas and urban centres located on top of old bumps that are found in ancient riverbeds. The seismic events occurred in rural areas have often used the wells and the irrigation network as a way of escape, whilst when on the inside of a building, the sand is likely to have followed escape routes created by human interventio
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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