1,720,981 research outputs found
Filiera delle produzioni forestali non legnose: produzione e raccolta tra sostenibilità e tracciabilità
No full textLa valorizzazione dei prodotti non legnosi trova nella certificazione un punto di forza, spendibile solo se esiste la possibilità di tracciare la filiera del prodotto all’interno di una “Catena di Custodia”. La gestione sostenibile delle sugherete può essere certificata da FSC, PEFC, CIPS e SFI, il processo di trasformazione industriale da Systecode (il più diffuso), FSC, PEFC, Reg CEE 1863/93 e ISO 14000/96. Al momento la gestione forestale è certificata quasi esclusivamente da FSC, con 30.000 ettari distribuiti tra Portogallo, Spagna e Italia (1,1% della superficie mondiale) e 50.000 ettari in fase avanzata di certificazione. Nel mercato globale del vino pochi produttori utilizzano tappi certificati, e nessuno di essi opera in Italia. Un accorta gestione multifunzionale sottende la possibilità di trarre reddito in modo sostenibile dai prodotti non legnosi del bosco. Per la pineta da pinoli sono possibili modelli colturali molto diversi. Per la raccolta di funghi commestibili rimane da chiarire se e come le pratiche selvicolturali possano favorire una maggiore produzione di carpofori. Lo studio di filiera, intesa come acquisizione di tutti gli elementi di conoscenza relativi all’insieme dei procedimenti e delle lavorazioni che si svolgono all’interno dei comparti produttivi interessati, diventa indispensabile in ogni processo di valorizzazione dei prodotti. Il processo di valorizzazione deve, inoltre, essere accompagnato dalla verifica della convenienza economica dell’investimento all’interno del quale va compreso anche l’impatto complessivo sull’intero sistema economico-ambientaleNon-timber forest products can strengthen and develop their markets through the use of a certification mark which guarantees the sustainable management of the forest and the traceability of the certified products during the processing (Chain of Custody). For cork oak forest management the main certification schemes are FSC, PEFC, CIPS and SFI, while for cork industry Systecode (the most common certification) FSC, PEFC, Reg CEE 1863/93 and ISO 14000/96. Currently, forest management is marked mostly by FSC: 30,000 hectares from Portugal , Spain and Italy (1.1% of the world surface). Other 50,000 hectares are under FSC certification process, but only few wine producers have certified their chain of custody with FSC scheme. In Italy no wine industry has the process certified nor does use certified cork top. Silviculture is an effective tool for certificated forest management which follow ecosystem approach to yield revenue in a sustainable way from non timber products. The case of umbrella pine fruits, edible mushrooms and truffles are briefly discussed. The analysis of the chain, to be meant as the acquisition of knowledge regarding the entire number of methods and processing that take place inside the involved productive sectors, becomes essential for the valorisation process of the products. Moreover, the process of valorisation has to go with the verification of the economic convenience of the investment inside which it has to be considered also the overall impact on the whole economic-environmental system
Raccordo tra pianificazione forestale e pianificazione antincendi boschivi.
No full textIl lavoro esamina le relazioni tra pianificazione forestale a livello regionale e locale(PFR e piani di assestamento forestale) e la relativa pianificazione antincendio. in particolare si evidenzia l'importanza della relazione con il livello locale nella programmazione di azioni selvicolturali volte a diminuire il livello di rischio e gestire il combustibile, nella possibilità di aumentare la resilienza dei sistemi
Strumenti operativi per la gestione sostenibile: la carta tipologica forestale dell’Abruzzo
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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
Does soil carbon stock change affecting soil microbial diversity under different beech stand structures?
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