1,360,117 research outputs found
Agriculture Sustainability in mountain areas: a Willingness To Pay (WTP) approach
No full textThe agricultural crisis forces the researchers and the world of science to address problems related to the primary sector through new theoretical and methodological approaches. Although the trend is the same worldwide, the phenomenon is more noticeable in disadvantageous areas, as the mountains. Some traits of mountain agriculture as remoteness, low productivity due to the poor quality land, extreme weather and small farm size, can limit the adaptation and competitiveness of this branch (Mazzocchi and Sali, 2016). The pastures, which are key elements of the mountain livestock, are undergoing for several decades a gradual process of abandonment (Giannini and Gabbrielli, 2013). Moreover they are important to the permanence of the typical alpine landscape mosaic and constitute a touristic attraction (Gios et al., 2006). However, the economic revitalization of agriculture in the mountains require substantial innovation: what could be the drivers for the innovation of alpine farms economy? Talking about multifunctional agriculture as the means to preserve agricultural landscape, to sustain rural development and to preserve the cultural heritage values, is possible to focus some basic elements that must be included in a process of innovation of the concept of mountain agriculture. The paper proposes a Choice Model analysis in order to evaluate the alpine pasture system in an area of the Orobie Bergamasche Park, in the Northern of Italy
Change detection mechanism in feedback implosion suppression algorithm for reliable transmission of multicast data over geostationary satellite network
No full textIn this paper, we propose a channel change detection mechanism implemented at UE to support feedback implosion suppression algorithm for reliable transmission of multicast data over GEO satellite networks. In this framework, reliability is guaranteed via MFTP that retransmits lost segments to the multicast group. A channel-aware scheduling mechanism is used at the Gateway that behaves like a switch to allow downlink transmissions of MFTP packets. The scheduler uses CSI values collected from group members through the CSI collection policy before making a decision as to whether or not to transmit a multicast packet in the forward link. As such, the scheduling algorithm aims at avoiding unfavorable channel conditions to reduce the forward link resources that would be wasted for retransmissions and to allow downlink transmissions only when users are in good channel condition, in the face of L-band mobile satellite channel conditions. The integration of channel-aware scheduling algorithm and CSI collection policy aims to reduce session duration and traffic volume in the return link by updating only relevant information back to Gateway. In order to achieve this objective, change detection mechanism is proposed. The performance parameters such as change detection rate and downlink resource utilization are analyzed. Two change detection algorithms are compared; it is shown that there is a trade-off in performance, in particular between uplink signalling load and downlink resource utilization. The work presented in this paper is executed within IST SatNEx II (EU IST FP6 - Contract No. 027393), JA2330 "Radio Resource Allocation and Adaptation" activity. Copyright © 2008 by Aduwati Sali
The cultural determinants of mountain products purchasing choices: a Partial Least Squares regression approach
No full textCertification marks can help consumers in food purchases, and can sustain the typical food products diffusion in the market. This is even more true in disadvantaged areas, where the market of typical food products can strongly support the local agriculture (Mazzocchi and Sali, 2018). European Union introduced the optional "mountain product" quality label with EU regulations 665/2014 and EU 1151/2012 to foster the mountain economic systems sustainable development. Food choices are also guided by ethical, environmental and cultural motivations, functioning as drivers of food purchasing. In qualitative surveys participants often have to indicate their attitudes towards the research issues, by using attitudes scale. Several researches have recently employed these models in assessing food purchasing drivers, for example investigating local products purchase motivations (Demartini et al., 2018), assessing personality traits influence in food purchasing (Bazzani et al., 2018), estimating environmental-friendly motivations in food choices (Haws et al., 2014). This research aims at assessing the cultural determinants of mountain food product label purchasing choices, by using a two-step approach. In the first step a Choice Experiment (CE) model has been used to estimate the consumers’ WTP for a mountain cheese, labelled with “mountain product” logo. Second step employed three attitudinal scales to assess their influence in the consumers’ behavior in choosing mountain labelled products
Le politiche agricole strutturali
No full textGli interventi strutturali in agricoltura presentano una struttura complessa che deriva principalmente dalle molteplici interrelazioni che stanno alla base dello sviluppo del settore agricolo e delle economie rurali. Alla complessità di impostazione deriva anche la complessità del momento della valutazione che, a seconda degli aspetti che si intendono indagare o delle relazioni che occorre far emergere, può richiedere una particolare impostazione metodologica. Fornire alle amministrazioni sempre migliori strumenti per il processo di policy making mediante l’approfondimento delle relazioni tra problemi-attori-risorse-azioni-prodotti-risultati-impatti appare quindi la premessa per rendere veramente produttivo il processo di apprendimento dalle esperienze acquisite, facendo emergere tutti gli elementi che consentono di rendere più efficace ed efficiente l’uso delle risorse pubbliche
Sali Minerali e Acqua.
No full textNell'ambito degli alimenti, i sali minerali sono le sostanze di origine inorganica che costituiscono le ceneri ottenute dopo incenerimento degli alimenti di origine animale o vegetale. Gli organismi viventi non sono in grado di sintetizzare i sali minerali, li eliminano attraverso i processi fisiologici di escrezione, per cui essendo elementi essenziali, devono essere assunti in modo continuativo con la dieta. I sali minerali sono introdotti nell'organismo con l'acqua e gli alimenti o sotto forma di condimenti che vengono aggiunti al cibo principalmente per aumentarne la sapidità.
L'acqua è una risorsa indispensabile per gli esseri umani, essa rende possibile la sopravvivenza e tutte le attività antropiche fondamentali, dalla cura dell'igiene personale, alla salute, allo sviluppo economico, sociale e culturale. Sulla superficie terrestre la risorsa idrica non è però distribuita equamente e tale situazione comporta il verificarsi di problematiche relative alla sua gestione, difficili da risolvere è accentuate dalla tendenza, sempre crescente assunta dalla domanda di acqua. La produzione è stato oggetto di numerose Direttive Europee
Baba Sali rabbinic court notebook
No full textA handwritten manuscript from the rabbinic court of Yisrael Abuhatzeira in Morocco. This manuscript contains 88 entries or rabbinic rulings - numbers on side margins of pages refer to entry numbers rather than page numbers (there are some page numbers in upper corner, but most are unnumbered). Author Yisrael Abuhatzeira was known as Baba Sali both within and beyond Morroco's Jewish community. His funeral, in 1984, was attended by an estimated 100,000 people and his tomb has become a pilgrimage site to Moroccan Jews.64 unnumbered pagesDiaries, Journals, Notebooks, and other Handwritten Manuscript
Monitoring morphological evolution of Perd'e Sali beach, Italy
No full textThe paper reports on the evolution of an eroding beach on the southern coast of Sardinia, Italy (Perd'e Sali Beach). An account is given first of the historic development of the beach as related to the action of man, including uncontrolled urban development and empirical protection practices, as well as rational structural measures, by comparison with results of monitoring surveys. An attempt will then be made of explaining the development of the beach after each of the major changes it underwent, through numerical simulation of near-shore hydrodynamics
Integrating remote sensing and census information for land securing in North, DRC
No full textLa competizione per l’uso della risorsa territoriale è considerata motivo scatenante e fattore perpetuante dei conflitti nella parte orientale della Repubblica Democratica del Congo (RDC). La letteratura esistente dimostra che il telerilevamento (RS) è uno strumento utile per monitorare sistematicamente le dinamiche spazio-temporali di uso e copertura del suolo in molte regioni del mondo. Per tale ragione in questo studio proponiamo una metodologia per l’integrazione di informazioni provenienti da diverse fonti, in particolare il telerilevamento e le interviste condotte in campo, volta alla messa a punto di un sistema spaziale di supporto alle decisioni finalizzato alla valutazione multicriteriale di potenziali siti pilota per lo sviluppo agricolo e il re-insediamento di rifugiati congolesi.Land disputes are considered both key sources and perpetuating factors of conflict in the eastern Democratic Republic of the Congo (DRC). Existing literature demonstrates that remote sensing (RS) is a useful tool for systematically monitor the spatial-temporal land use/land cover dynamics in many regions of the world. For this reason, in this paper we propose a methodology for the integration of different sources of information, namely satellite imagery and census information, in order to set up a Spatial Decision Support System aimed at Multi-Criteria Evaluation of potential pilot sites for agricultural development and refugees resettlement
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