1,720,966 research outputs found
Analisi micro economica in olivicoltura
No full textThe Italian olive industry is undergoing a
structural crisis, and despite the continuing
increase in world demand, oil prices on
international markets remain at low levels with
often unsatisfactory results for the domestic
producers.
The limited size of olive groves, the location of
many in sloping terrain, the limited renewal of
plants, agronomic management is not always best
represent some of the limiting factors. In the
pursuit of cost effectiveness and aware of the
potential production of many national intensive
olive groves, we should define patterns
productive reference to suggest what is
considered the reference technique, able to
optimize yields and incomes. The estimate of
production costs and income arising from it is a
useful element of judgment for the manufacturer
is in comparison with its cost of production, both
for the analysis of the differences between
technologies be adopted with respect to
production areas
Orticoltura biologica e filiera corta: alcuni casi di studio
Full text linkL'obiettivo generale del lavoro è delineare le principali motivazioni del successo e le problematiche relative alla produzione di ortaggi biologici commercializzati con sistemi a filiera corta. I risultati a cui si perviene potranno essere di supporto ad altre aziende fornendo loro possibili soluzioni organizzative. I dati utilizzati derivano dall'attività di ricerca attuate con il progetto Ort.Bio che ha riguardato le regioni Emilia Romagna, Marche e Abruzzo
Olivicoltura tradizionale fra intensivizzazione e paesaggio: Un modello di programmazione matematica multiobiettivo a numeri interi
No full textFocusing on olive oil sector in central Italy, this paper proposes a decision support system for olive growers in order to: i) identify the optimal crop management in the hypothesis of maximizing gross farm income and maximizing a landscape integrity index; ii) simulate the effects of different policy and market scenarios. Results from multi-objective integer optimization models showed that the solution obtained by maximizing the gross income foresees the intensive crop management and the complete allocation of the farm area to newly planted olive groves. The traditional crop management is chosen when the landscape integrity index is maximized. However, only a 30% increase of the Extra Virgin Olive Oil price from ancient and traditionally managed olive groves could ensure their complete maintenance
Energy analysis of organic horticultural farms in Italy
No full textThe aim of this research is to evaluate energy efficiency of organic horticultural farms in Italy at both surface (GJ/GJ ha-1 year -1) and product (kgMJ-1) level. The methods used is the Output/Input balance at farm level using energy equivalents of the three phases: production, transformation/conservation and marketing. The methodology have been applied to 8 case studies of the organic horticultural Italian sector. The results show that the energy input is low but also the energy efficiency is not high especially if compared to other study of the arable sector. However they show very positive aspects in the commercial phase
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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