1,721,025 research outputs found
La trasformazione del territorio rurale : evoluzione dell’uso del suolo agricolo nel Sud-Milano
No full textA partire dal secondo dopoguerra si è registrata in Italia una continua espansione delle aree urbanizzate, a scapito delle superfici destinate all’agricoltura. Questo fenomeno è risultato spesso molto accentuato nei pressi delle grandi aree urbane. Ciò ha posto l’esigenza di mettere in atto iniziative di pianificazione in grado di riequilibrare il processo di crescita urbana.
Tra le soluzioni adottate al fine di limitare lo sviluppo delle grandi città (e la conseguente sottrazione di suolo agricolo) occupa una posizione di spicco l’esperienza delle green belts, istituite in diverse città del Regno Unito e del nord Europa nel secondo dopoguerra.
Anche per la città di Milano, a partire dagli anni ’60, è maturata l’idea di realizzare uno spazio verde intorno alla città, che ha portato, nel 1990, all’istituzione del Parco Regionale di Cintura Metropolitana “Parco Agricolo Sud Milano”. In tale ambito territoriale è stato sviluppato uno studio con l’obiettivo di analizzare l’evoluzione dell’uso del suolo negli ultimi 50 anni e valutare l’efficacia della funzione di limitazione all’espansione urbana svolta da tale parco di cintura metropolitana.
La metodologia utilizzata per il raggiungimento degli obiettivi è quella del confronto temporale di dati territoriali (cartografia, dati telerilevati e statistici), elaborati tramite GIS (Geographical Information System), riferiti a periodi diversi e in grado di evidenziare una sorta di evoluzione storica della tematica oggetto dello studio.
Sono state derivate informazioni relative ai trend di espansione delle aree urbanizzate attraverso l’elaborazione di alcuni indicatori, disaggregati anche a livello comunale. I risultati hanno permesso di formulare un giudizio sull’efficacia della cintura verde relativamente alla funzione di controllo e limitazione dell’espansione urbana
Il contributo dei Sistemi Informativi Geografici nella gestione delle problematiche agricole e ambientali
No full textL'articolo analizza il contributo dei Sistemi Informativi Geografici nella gestione delle problematiche agricole ed ambiental
Simultaneous determination of nimesulide and hydroxynimesulide in rat plasma, cerebrospinal fluid and brain by liquid chromatography using solid-phase extraction
No full textA liquid chromatographic method with UV detection for the quantification of nimesulide (N) and hydroxynimesulide (M1) in rat plasma, cerebrospinal fluid (CSF) and brain tissue is reported. Plasma samples (250 μl) and brain homogenates added with the right amount of the internal standard (I.S., 2′-(cyclohexyloxy)-4′-nitrophenyl methanesulphonanilide, NS398) are extracted on C18 disposable cartridges by solid-phase extraction (SPE), while CSF samples are analyzed without any extraction. The separation is performed at room temperature on a Waters Symmetry C18 3.5 μm (150×4.6 mm I.D.) column with acetonitrile-sodium citrate buffer pH 3.00 (53:47, v/v) as mobile phase, at a flow-rate of 1.1 ml/min and detection at 240 nm. The retention times are 3.3, 6.0 and 9.9 min for M1, N and I.S., respectively. The lower limits of quantitation for either nimesulide and M1 are 25 ng/ml for plasma, 20 ng/ml for CSF and 25 ng/g for brain tissue. The calibration curves are linear up to 10 000 ng/ml for plasma, 5000 ng/ml for CSF and 5000 ng/g for brain tissue. This new assay can be applied to the study of the role of nimesulide in the modulation of neuroinflammatory processes
Le acque
No full textLa risorsa acqua ha da sempre rappresentato un elemento centrale all'interno del Parco di Monza. Il contributo analizza dal punto di vista storico le caratteristiche del sistema idrografico e irriguo del Parco di Monza con particolare riferimento alla documentazione cartografica disponibile all'interno del "Fondo disegni delle residenze Reali Lombarde
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
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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