2,459 research outputs found
Thermal stability of 1x1020 cm-3 Al+ implanted 4H-SiC after electrical activation at temperature >= 1850 °C
No full textThe effect of a 1500 °C treatment on 1x1020cm-3 Al+ ion implanted in 4H-SiC samples that have been previously annealed at 1850-1950 °C is studied in this work. Up to 240 min annealing time at 1500 °C, the Al electrical activation reached at 1850-1950 °C is preserved
Il corpo nello schermo. Analisi di "The Quintet of the Astonished" di Bill Viola
No full textNella video installazione di Bill Viola, The Quintet of the Astonished, vediamo in slow motion come gruppo di cinque persone è attraversato da una forte onda emotiva di "shock", che si declina in ognuna in modo diverso. Attraverso un'analisi semiotica dell'opera e una ripresa dei ritratti di gruppo a cui Viola si rifà, comprendiamo come l'autore profonga una riflessione sulla nostra capacità di comprendere le emozioni altrui, sulla comunicazione intercorporea alla quale non possiamo sottrarci.In the video-installation of Bill Viola, called The Quintet of the Astonished, we see in slow-motion how a group of five people experience different types of astonishment, looking to their body reaction to this emotion. In a deep dialogue with different past group portraits, Bill Viola lead us through a profound reflection on how our body is able to communicate by itself, on our collective capacity to understand each others emotions
Spazio, memoria e ideologia. Analisi semiotica del Sacrario Monumentale di Cima Grappa
No full textIl sacrario di Cima Grappa, costruito dal governo fascista nel 1935 per ricordare e seppellire i morti sul Grappa della Prima guerra Mondiale, tocca il cuore dell'identità del potere che lo costruisce parlandoci di come il fascismo abbia guardato al passato per costruire non solo il presente ma soprattutto per preparare un preciso futuro. Tramite la metodologia semiotica si spiega il funzionamento del luogo, quindi come questi blocchi di pietra siano stati creati per trasmettere al visitatore un preciso e inconfondibile messaggio.The Monte Grappa memorial was built by the fascist government in 1935 to remember and bury the soldiers victims of the First World War, fought on the mountain. A semiotic analysis allows us to mark how this place is deeply intertwined with the fascist ideology and to understand which image of the past, the present and the future it sends
I libri di Federico Sozzi, a cura di L. Farinelli, con la collaborazione di C. Farinelli, presentazione di M. Pellegri, Parma, Artegrafica Silva, 2004
No full textIl contributo fornisce una recensione del volume "I libri di Federico Sozzi", a cura di L. Farinelli, con la collaborazione di C. Farinelli, presentazione di M. Pellegri, Parma, Artegrafica Silva, 2004
Ni-Al-Ti ohmic contacts on 1 x1020 cm-3 Al+ ion implanted 4H-SiC
No full textNi/Al/Ti ohmic contacts with preserved form factor during alloying at 1000 °C, almost constant specific resistance value in the low 10-4 Ohmxcm2 decade, and a very weak temperature dependence in the range 25 - 290 °C, have been obtained on 1x 1020 cm-3 Al+implanted p-type 4H-SiC of different resistivity in the range 6 x10-2- 1 Ohmxcm2. A qualitative data analysis for understanding the hole transport mechanism through the formed metal/semiconductor interface is also shown
Formation of c anti-c states from anti-proton proton annihilations in the Fermilab Accumulator (E760)
No full textCaratteristiche e modi di utilizzo della selce del sito preistorico di Isernia La Pineta
No full textPresentazione dello studio dei reperti litici dell'insediamento de La Pinet
Investigating Mesa Structure Impact on C-V Measurements
No full textCapacitance-voltage (C-V) measurements play a crucial role in evaluating semiconductor device performance by revealing vital parameters such as doping levels and charge carrier behavior. This study specifically investigates the impact of mesa structures on C-V measurements in 4H-SiC PiN vertical diodes. Our analysis uncovers distinct capacitance values per unit area among diodes with varying diameters within the same diode family. These findings underscore the limitations of conventional capacitance equations formulated for planar devices when extended to mesa-structured devices. To separate the capacitance portion dependent solely on the PN junction's area from the overall depletion capacitance, which is influenced by the device's geometry, we applied a methodology involving multiple C-V measurements across diodes with differing diameters and validated the experimental outcomes through rigorous calculations. This enables the utilization of standard capacitance equations. Neglecting the impact of device geometry has the potential to introduce significant inaccuracies in critical device parameters. The proposed methodology addresses these limitations, offering valuable insights to enhance the accuracy of extracted quantities from C-V measurements. Furthermore, it provides guidance for interpreting experimental data obtained from devices incorporating mesa structures
The trigger and data acquisition system for the NA62 experiment at CERN
No full textThe NA62 experiment at CERN aims at measuring the ultra-rare kaon decay K(+) --> pi(+)nu(nu) over bar with a decay in flight technique. The nature of the experiment puts stringent requirements on the trigger and data acquisition system, which is being developed exploiting in part existing solutions. The design concepts for the system are discussed, the chosen solutions are described, together with some results from the prototype test systems. (C) 2009 Elsevier B.V. All rights reserved
Effectiveness of 1-MCP treatments on ‘Bartlett’ pears as influenced by the cooling method and the bin material
No full textWooden bin-stored ‘Bartlett’ pears (Pyrus communis L.) were hydrocooled (HC) or forced-air cooled (FAC) and immediately treated or not with 1-methylcyclopropene (1-MCP) for 24 h. 1-MCP gas concentrations used were 0, 0.3 or 0.6 μL L−1 (called 0, 0.3 and 0.6, respectively). Fruit were subsequently kept at 20 °C for 20 d or stored at −0.5 °C and 95% RH for 60, 90, 120 or 150 d. After cold storage, fruit were kept at 20 °C for up to 16 d for further ripening. In another experiment, pears stored in wooden bins (W) or plastic bins (P) were all hydrocooled, treated or not with 0.5 μL L−1 1-MCP (called 0.5 and 0, respectively), stored at −0.5 °C and 95% RH for 0, 30, 60, 90 or 120 d, and transferred to 20 °C for further ripening. In FAC pears, increasing 1-MCP concentrations usually resulted in delayed increases in ethylene production and lower ethylene production rates, as well as delayed softening. In contrast, HC-0.3 pear firmness did not differ from that of HC-0 fruit after cold storage. Generally, HC-0.3 pears displayed higher ethylene production and lower firmness values than FAC-0.3 pears after a 7-d exposure to 20 °C, regardless the length of cold storage. FAC-0.6 pears always showed lower ethylene production rates and higher flesh firmness values than HC-0.6 fruit. Soluble solids concentration was not consistently affected by 1-MCP. FAC-0.3 and HC-0.6 fruit showed higher titratable acidity values than HC-0 fruit after 0, 60, 120 and 150 d of cold storage plus 7 d at 20 °C. Effectiveness of 1-MCP treatments on HC pears was influenced by the bin material; P-0.5 pears were firmer than W-0.5 pears after 7 d at 20 °C, regardless the length of the cold storage. HC-0.5 fruit exposed to −0.5 °C for 90 d reached eating quality (firmness ≤23 N) by day 7 if placed in W, and by day 21 when stored in P. Results and previous evidence suggest that wet wooden bin material may represent a major though unpredictable source of 1-MCP sorption that could bind a significant percentage of the 1-MCP applied. When used at relatively low doses 1-MCP partial removal by wet wooden bins can compromise the application effectiveness for controlling ethylene action.EEA Alto ValleFil: Calvo, Gabriela. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Alto Valle; ArgentinaFil: Sozzi, Gabriel Oscar. Universidad de Buenos Aires. Facultad de Agronomía; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); ArgentinaFil: Sozzi, Gabriel Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin
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