1,720,981 research outputs found
Irrigated agricultural systems in Italy: Demand and supply of water management instruments
No full textIn the agricultural sector, the demand for water can be affected by reductions in the availability of water for crops, forcing farmers to revise their addresses in some cases cultivation. In fact, adaptation measures to climate change may require the use of less water demanding crops. Recently, a combination of the above mentioned factors have contributed to the development of irrigation advisory services (IASs) at farm level, often of high technological value, for the rational use of water for irrigation. Tools such as high-tech irrigation systems will play a key role in the future for the challenges that climate change will impose. The objective of this paper has been define, irrigated agricultural systems in Italy trought of analysis of demand and supply of water management instruments. The analysis has been conducted of IASs. Main results of the conducted analysis has shown that many areas of the country do not adopt this services
Il suolo ci regala tanto. Non calpestiamolo
Get PDFLIFE + SAM4CP "Soil Administration Model 4 Community Profit" (www.sam4cp.com), aims to demonstrate that the planning and regulation of land use require the integration of policies for the protection of soil resources and evaluation the economic implications, in terms of cost/benefit, their impact on the ecosystemic functions of the resource itself. With effects on the production capacity, availability of raw materials, biodiversity, carbon cycle, water cycle, landscape heritage and environmental functions of rural areas and the hydrogeological hazards. The project aims to propose simulation models on the impacts of soil sealing both the consequences, regarding ecosystem and economic, for the community, to be used in the context of urban planning and policies of government land
Willingness to pay for Irrigation Advisory Services: Based on Integrated Use Of Earth Observation Data And Information Technologies
Get PDFThe present research by the use of discrete choice model (CM) has analysed the willingness to pay for satellite based of irrigation advisory services in an area of Italy characterized of intensive use of water for irrigation. One original aspect of this study concerns the case study where our work has been implemented. In fact, several studies that used CM have been implemented in agricultural areas and considered water resources management, but we do not fund studies concerning the irrigation advisory service (IAS), specially characterized by a i) highly innovative and technological value offering by the use of Earth Observation (EO) techniques for water saving. The innovative approach of this work was to understand and learn about the different expectations of farmers than consulting services to irrigation in an area of Italy where such services have achieved levels of excellence.
The study was carried out in the Campania region in area of Italy covered by IAS called IRRISAT.
In 2013, the service has provided support for three Irrigation and Land Reclamation Consortia (ILRC), with 669 farmers and extension of 55.03,57 hectares. Based on these considerations, the specific aims of this work has been i) to analyse the importance of technological innovation in the agricultural water management ii) to define throughout the use of choice experiment (CE) the preferences of the farmers regarding the main characteristic, attributes, of the IRRISAT, iii) to analyse marginal willingness to pay for this service.
The main results of the research have confirmed that water is a primary asset for farms and the most important factor for agricultural production. Therefore, there is a clear need for greater use of tools and methodologies to account for water use in irrigation practice. The results have shown the general appreciation for IRRISAT and their willingness to pay for this service
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
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
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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