495 research outputs found
ALBANA DI ROMAGNA:IL PIÙ ROMAGNOLO DEI VITIGNI
No full textL’Albana, anche se con la sua coltura non occupa estese superfici (circa 1500 ettari), è sicuramente il vitigno
più rappresentativo della Romagna. Non a caso, nel 1987, gli fu riconosciuta, primo vino bianco in Italia,
la Docg, menzione che viene attribuita solo in virtù di un profondo legame di un vitigno con il suo areale
di coltivazione, sia in termini di vocazionalità che di tradizione colturale e culturale
Pietra di Langa
No full textCampagna di documentazione fotografica sull'Alta Langa, tra la valle Bomida e Uzzone che è caratterizzato da un paesaggio instabile dovuto alla dimissione del sistema dei terrazzamenti che lo caratterizzano e lo disegnano
The "semi-minimal pruned hedge (SMPH)", a novel grapevine training system, tested on cv. Sangiovese (V. vinifera L.)
No full textIn a previous three-year study on cv. Sangiovese (V. vinifera L.), the degree of adaptation to minimal pruning (MP) compared with conventional spur-pruning (CSP) was investigated in the Central Po Valley in northern Italy (Intrieri et al., 2001). Despite a marked reduction in bud sprouting, shoot fruitfulness and cluster weight, the MP vines, in which more than 600 nodes per m of row were left, showed an alternate bearing pattern coupled with large crop-linked variation of grape quality. However, the clusters of MP vines were distinctly less compact than those produced by CSP and this feature was crucial in preventing massive bunch rot even in wet season. Since all Sangiovese clones are currently characterized by dense or very dense clusters, the MP looks like an effective tool to induce looser clusters, but it was clear that future work will have to assess to counterbalance the drawbacks related to alternate bearing pattern and the delayed or incomplete ripening without loosing the feature of less compact clusters.
According to this principle, a novel grapevine training system featuring a hedge-wall 120 high x 20 cm in depth was tested on cv. Sangiovese. Designed for integral mechanised pruning and harvesting as the classic MP, but also for a more severe winter pruning, the new system was called the ‘semi-minimal pruned hedge’ (SMPH) and was shaped since 1998 starting from a spur-pruned cordon vines, by attaching a few of the preceding year’s canes to the horizontal trellis wires. The hedge shape was maintained over time by pruning the sides and top with mechanical cutter bars. Three years after the first pruning a specific study was performed, in which SMPH was compared against CSP featuring 18 count nodes per vine and per meter of row. Over the period 2000-2002, the nodes left on SMPH were 320 per m of row.
As expected, the hedged vines showed a consistently earlier leaf-area expansion in spring and a larger leaf area per vine at the end of shoot growth. Measurements of single-leaf photosynthetic capacity evinced no significant differences between the two systems, thereby indicating a greater take-up potential of the SMPH vines. Accordingly, the average yield of the SMPH vines was about 30% higher than the CSP’s, but no differences in final ripening were found. These results were confirmed during the 2002 season, in a parallel work (Filippetti et al., 2004), in which photosynthesis and dry matter production of the SMPH and of the CSP were modelled by the software Stella (High Performance System Inc. USA) and showed that SMPH had an higher dry matter accumulation compared to CSP all along the season. Overall, the SMPH clusters appeared smaller over the trial years, with less compact berries and free of botrytis (bunch rot) attacks with respect to CSP’s. In addition, a preliminary experiment on mechanical harvesting of the SMPH with an over-row horizontal shaking unit was successfully performed at the end of 2002 season.
All the above data suggest interesting practical application for the SMPH system, because of its adaptability to full mechanization and for the positive findings in regard to vine physiology and grape yield and quality, as well as to lower susceptibility to bunch rot
Body perception in newborns
No full textBody ownership and awareness has recently become an active topic of research in adults using paradigms such as the “rubber hand illusion” and “enfacement” [1, 2, 3, 4, 5, 6, 7, 8, 9, 10 and 11]. These studies show that visual, tactile, postural, and anatomical information all contribute to the sense of body ownership in adults [12]. While some hypothesize body perception from birth [13], others have speculated on the importance of postnatal experience [14 and 15]. Through studying body perception in newborns, we can directly investigate the factors involved prior to significant postnatal experience. To address this issue, we measured the looking behavior of newborns presented with visual-tactile synchronous and asynchronous cues, under conditions in which the visual information was either an upright (body-related stimulus; experiment 1) or inverted (non-body-related stimulus; experiment 2) infant face. We found that newborns preferred to look at the synchronous condition compared to the asynchronous condition, but only when the visual stimulus was body related. These results are in line with findings from adults and demonstrate that human newborns detect intersensory synchrony when related to their own bodies, consistent with the basic processes underlying body perception being present at birth
Development of expert system knowledge base to on-line diagnosis of rotor electrical faults of induction motors
No full textThe paper concerns the development of the Knowledge Base branch related to rotor electrical faults in squirrel cage machines, to be implemented in an Expert System, utilizing current instantaneous values as input data. The Knowledge Base is organized in two levels: in the first level diagnostic indexes for the orientation of the E.S. inferential engine toward the appropriate branch of the fault tree are utilized. The second level includes the deep knowledge with a data set obtained on the basis of a complete faulty machine model. The diagnostic indexes of the first level concern how to distinguish 'faulty' events from the 'healthy' signals due to the unavoidable manufacturing asymmetries. They are pointed out through a simplified model of faulted rotor that needs few machine parameters. This diagnosis may substitute the second level diagnosis if the machine design data, necessary for the second level diagnosis, are not available or if the extensive work needed for the data base construction would be avoided. Some diagnosis examples are reported to describe the sequence of operations of the diagnostic system
IME: 4-TERM FORMULA METHOD FOR THE SYMBOLIC ANALYSIS OF LINEAR CIRCUITS
No full textThis paper is intended to show a general method (Inhibition Method - IME) that relies on the superposition principle, to nallyze linear electric circuits, based on hierarchical sequences of more simple topologies with some inhibited elements, and on a simple recollecting logic to calculate the final solution from the previous partial and more elementary solutions. The method, formulated symbolically in a complete abstract way, because its intrinsic nature of hierarchical problem decomposer allows to avoid the typical limitations of the symbolic analysis
Electronic Structure Of Defects In Dielectrics With Electronic Correlation
No full textA consistent and accurate calculation of the electronic levels of defects in insulators is still difficult despite all advances in ab initio techniques. Here we report applications of a density-functional-based self-interaction corrected method to defect in oxides exhibiting different degrees of electronic correlation. that Fundamental gaps agreeing well with experiment can be obtained even where conventional techniques give metallic behavior. We analyze the electronic and charging levels of a selection of defects in oxides of technological interest (O vacancy in HfO2, and LaAlO3, Mn in CuO, and O interstitial in YBa2Cu3O6). The calculated properties exhibit an improved consistency, sometimes qualitative, over previous treatments
Valutazione del contenuto in solidi solubili in acini di uva da vino tramite la metodologia non distruttiva NIRS.
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