1,721,230 research outputs found
Una possibile interpretazione del processo di convergenza agricola tra le regioni italiane con la banca dati Agrefit
No full textLa revisione di Medio Termine della Politica agricola comunitaria (PAC) e la recente riforma della
politica di sviluppo rurale per il 2007-13 hanno ribadito la centralità del processo di convergenza
delle economie agricole e il suo importante contributo alla coesione economica europea.
In letteratura, le analisi sulla tendenza di lungo periodo alla riduzione delle disparità regionali della
produttività del lavoro agricolo hanno da sempre ricevuto una particolare attenzione nell'ambito
della comprensione delle grandi tendenze dell'economia moderna. Questi studi, tuttavia, risentono
di diversi limiti tra i quali, di particolare rilevanza, è la disponibilità di serie storiche sufficientemente
estese per affrontare un fenomeno, che per sua natura è strutturale. Rispetto all'Italia, ad esempio, i
dati di fonte ufficiale non consentono di andare oltre l'intervallo temporale 1980-2002.
In tal senso, la banca dati Agrefit (1) (si veda la scheda inserita in questo numero) relativa ai ricavi,
costi e produttività dei fattori nell'agricoltura delle regioni italiane tra il 1951 e il 2002 si pone come
una importante base statistica per le analisi quantitative nel lungo periodo
L’analisi dei differenziali di sviluppo delle province italiane in una nuova prospettiva metodologica
No full text
Digital pulse shape analysis in nuclear physics experiments with intermediate energy heavy ions
No full textThis thesis work concerns the developments in the field of pulse shape analysis of detector signals to perform particle identification in nuclear physics experiments. Using Sampling ADC it is possible to collect pulse shapes and extract the physic related information using algorithms devoted to pulse shape analysis. A Data Acquisition System based on digital pulse shape acquisition and the analysis algorithms devoted to particle discrimination was designed and developed to study and test with ad hoc software the digital particle identification methods. The possibility to sample the pulse shape of signals from detectors offers additional and more detailed information on particle interactions. In this way it is possible: to extracts the Fast and the Slow components of the CsI(Tl) and BaF2 scintillation light; to obtain good timing performances from different detectors; to measure the Silicon rise time to be used for pulse shape discrimination and to study timing and particle identification in the new LaBr3 detectors. The time measurements using silicon detectors, and scintillators were widely investigate, in particular it was studied an exhaustive study of the digital timing performances of scintillators by varying the sampling frequency was made for BaF2 and LaBr3 detectors. This work shows that using digital pulse shape acquisition and analysis it is possible to obtain good results in particle discrimination usually better than using traditional methods
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
Economia Agroalimentare: mercati e politiche
No full textIl volume offre una presentazione introduttiva e allo stesso tempo rigorosa di alcuni strumenti di analisi necessari allo studio del settore agroalimentare tenuto conto dei cambiamenti intervenuti nell’economia, in particolare agraria, e nella società reale. Esso approfondisce tre ambiti principali di studio dell’economia agraria, vale a dire l’analisi della struttura dei mercati agroalimentari, dell’organizzazione e delle strategie all’interno del canale distributivo agroalimentare, e delle politiche per il settore agroalimentare. Il volume è stato concepito per fini didattici e nasce dall’esperienza pluriennale degli autori nell’insegnamento dell’economia agroalimentare, ma ben si adatta anche a diventare base culturale e di lavoro per gli operatori del settore agroalimentare
Decoupling and rural development policy: possibile implications on agricultural production in old and new member states
No full textVariations 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
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