1,004 research outputs found

    Is family farming educational? The Australian experience

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    The Australian rural landscape has been changing throughout history since the first European settlement. The progressive expansion of agriculture in the past centuries is responsible for its modification and diversification. Family farming has a relevant role in the Australian agriculture and food production, however in the last decades it has been facing a consistent decline, primarily because of economic and climatic reasons. This paper aims to retrace the historical development of agriculture in Australia and to analyse the current situation of family farming, by reporting the tendencies and the changed features, the educational and social aspects, and the interaction with the rural landscape. According to our research it emerged that family farming has been one of the major keys of the agricultural sector development in Australia and was deeply affected through history by internal and external factors such as globalization, neoliberalism, immigration and climatic conditions. Nowadays family farming is pivotal in the interface connection between modern societies and rural environment. In fact it is also becoming an important component of national tourism, with the birth and development of agrotourisms and holiday farms which in the past years have accounted for a considerable percentage of visits both from international and national people

    Contesto e concetto. Alcune riflessioni sulla microstoria

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    In questo articolo viene formulato un bilancio provvisorio sulle questioni di metodo legate alla microstoria (una delle correnti maggiori della storia sociale italiana, formatasi a partire dalla seconda metà degli anni ’70 attorno alla rivista Quaderni Storici). Questa pratica storiografica si presenta come una critica radicale del linguaggio storiografico convenzionale – i cui termini e concetti designerebbero realtà omogenee e autoevidenti (Stato, mercato, élite ecc.) – ma il suo contributo epistemico va compreso tendendo conto della revisione delle categorie di «continuità» e «normalità» che essa opera. Della prima si constata il carattere derivato e aposteriori (essenziale è il postulato della discontinuità tra le «scale» di rappresentazione); della seconda viene ugualmente contestato il carattere apriori (ciò che è vissuto come normale da un dato attore diviene visibile per lo storico in virtù della sua eccezionalità, in quanto interrompe o scarta la riproduzione delle norme sociali e riconfigura l’assetto delle fonti). L’articolo conclude che in entrambi i casi la microstoria ha dato un impulso imprescindibile alla razionalità del discorso storiografico, mostrando al contempo i propri limiti immanenti in quanto opzione metodologica che reagisce ad una determinata congiuntura culturale

    Aroma of peaches and nectarines: interaction between maturity at harvest, postharvest conditions and fresh-cut processing

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    Peach is one of the most appreciated temperate fruit worldwide with high potential value on the market. However, consumers are not satisfied with the quality attributes of peach and nectarine at consumption and are not stimulated in repurchasing the fruit. This induced a strong decrease in sales in both local and export markets with the consequent drop of revenues for producers. In addition to fresh consumption, the offer of fresh-cut peaches and nectarines is increasing and represent a valid alternative for stone fruit commercialization to match the increasing demand of ready-to-eat product on the market. The aim of this work was to explore the interaction between the maturity at harvest and the development of the fruit flavour during postharvest, including the volatile organic compounds (VOCs) responsible for the aroma. Different peach and nectarine cultivars were used as well as different technologies such as SPME-GC-MS and PTR-ToF-MS to characterize the aroma profile of the fruit. Diverse cold storage lengths were applied to simulate short and long-distance export in which fruit are generally submitted to fulfil market demands. Furthermore, VOCs were also investigated on different cultivars of nectarines submitted to fresh-cut processing. When fruit were submitted to cold storage the volatile profile of the fruit was generally enhanced, weakening the differences present at harvest between maturity classes. Fresh-cut processing, induced a major variation in the volatile profile of the fruit such as the immediate release of VOCs associated with positive sensations, and the production of off-flavour volatiles over time in cold storage. A quality-oriented storage, processing and packaging should include the aroma volatiles to ensure the success of the peach and nectarine industry

    Grandi eventi e rilancio della città: il caso di torino

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    Urban transformations are always accelerated in the cities, which had hosted a ‘big event’. There are a lot of examples inside and outside Europe: Turin is possibly the most important Italian city regeneration case after a big event. Our text is concerning about the impact of the 2006 Olympic Games on the urban renewal processes in Turin, and analyses how the happening plays, in a time when urban marketing is increasing its importance. The opportunity to distinguish between ‘fleeting’ transformations from structures remaining when the Olympic days will be over is a premise to value the role of the happening in social and economical development of Turin

    Thermal phase shifters for femtosecond laser written photonic integrated circuits

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    Photonic integrated circuits (PICs) are today acknowledged as an effective solution to fulfill the demanding requirements of many practical applications in both classical and quantum optics. Phase shifters integrated in the photonic circuit offer the possibility to dynamically reconfigure its properties in order to fine tune its operation or to produce adaptive circuits, thus greatly extending the quality and the applicability of these devices. In this paper, we provide a thorough discussion of the main problems that one can encounter when using thermal shifters to reconfigure photonic circuits. We then show how all these issues can be solved by a careful design of the thermal shifters and by choosing the most appropriate way to drive them. Such performance improvement is demonstrated by manufacturing thermal phase shifters in femtosecond laser written PICs (FLW-PICs), and by characterizing their operation in detail. The unprecedented results in terms of power dissipation, miniaturization and stability, enable the scalable implementation of reconfigurable FLW-PICs that can be easily calibrated and exploited in the applications

    The Optimal Permeation of Cyclic Boronates to Cross the Outer Membrane via the Porin Pathway

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    We investigated the diffusion of three cyclic boronates formulated as beta-lactamase inhibitors through the porin OmpF to evaluate their potential to cross OM via the porin pathway. The three nonbeta-lactam molecules diffuse through the porin eyelet region with the same mechanism observed for beta-lactam molecules and diazobicyclooctan derivatives, with the electric dipole moment aligned with the transversal electric field. In particular, the BOH group can interact with both the basic ladder and the acidic loop L3, which is characteristic of the size-constricted region of this class of porins. On one hand, we confirm that the transport of small molecules through enterobacter porins has a common general mechanism; on the other, the class of cyclic boronate molecules does not seem to have particular difficulties in diffusing through enterobacter porins, thus representing a good scaffold for new anti-infectives targeting Gram-negative bacteria research
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