Search results for "Fab"
showing 10 items of 1201 documents
High-frequency filtering for low-temperature thermal transport studies in nanostructures
2012
Filtering of external unwanted RF-noise and thermal noise generated at the high-temperature parts of the measuring circuit is essential for successful measurements of thermal transport of nanostructures at low temperatures. This is because of thermal decoupling of the systems, i.e. the extreme weakness of thermal conduction at sub-Kelvin temperatures, leading easily to overheating even with excess power in sub pW range. We have started to improve the noise filtering in our cryogenic dilution refrigerators, which can reach a base temperature of ~ 50 mK. The miniature low-pass filters were made from special RF sealing compound Eccosorb CR124, stainless steel powder of grain size 50 micrometer…
City-forming Rome: mappe di una città da ri-colonizzare
2017
L’unità di ricerca di Palermo è stata partecipe dell’iniziativa “ROMA 20-25. Nuovi cicli di vita per la Metropoli”, che ha chiamato ventiquattro scuole di architettura, università italiane e internazionali, a interpretare il presente urbano di Roma e immaginarne il futuro attraverso un workshop internazionale di progettazione e una mostra. Il progetto “ROMA 20-25 Nuovi cicli di vita per la Metropoli” è stato promosso dall’Assessorato alla Trasformazione Urbana del Comune di Roma e dal MAXXI, Museo Nazionale delle Arti del XXI secolo. L’area di progetto che è stata affidata all’UdR di Palermo è quella del quadrante n.12, caratterizzata dall’essere attraversata da est a ovest dal fiume Tevere…
Le Confabulationes di Poggio e il «palcoscenico» della Curia
2014
Il saggio prende in esame la struttura e l’organizzazione retorica del Liber facetiarum di Poggio Bracciolini, avanzando alcune ipotesi sul progetto narrativo dell’autore alla luce delle modifiche apportate nelle diverse fasi redazionali del libro. L’accento viene posto sulla costruzione di una cornice dialogica, che coordina le singole pièce narrative e riconduce l’atto del narrare alle conversazioni del circolo umanistico della Curia pontificia. Da un lato, Poggio recupera il modello della «lieta brigata» del Decameron, adattandolo al nuovo contesto della "confabulatio" umanistica; dall’altro, approfondisce la dimensione comica e scenica dello scambio verbale, istituendo uno stretto rappo…
Miniature MOEMS hyperspectral imager with versatile analysis tools
2019
The Fabry-Perot interferometers (FPI) are essential components of many hyperspectral imagers (HSI). While the Piezo-FPI (PFPI) are still very relevant in low volume, high performance applications, the tunable MOEMS FPI (MFPI) technology enables volume-scalable manufacturing, thus having potential to be a major game changer with the advantages of low costs and miniaturization. However, before a FPI can be utilized, it must be integrated with matching optical assembly, driving electronics and imaging sensor. Most importantly, the whole HSI system must be calibrated to account for wide variety of unwanted physical and environmental effects, that significantly influence quality of hyperspectral…
Discovering knowledge in various applications with a novel hyperspectral imager
2013
Productions en série vers 1500 avant notre ère. Des règles de fabrication au Bronze moyen entre la Manche et les Alpes à la lumière d’une étude morph…
2013
Some European Bronze Age objects were produced by what has been described as serial metalworking. One particularexample is the Middle Bronze Age palstave, massively produced and used in Western Europe during the mid-second millennium BC.These artefacts were often voluntarily buried together in hoards, meaning they were removed from the production network, thus avoidingany recycling. They are found intact, either as rough castings or ready for use. These homogeneous objects are grouped in sets of severalitems, or in tens, or even in hundreds. Such discoveries have immediately led to numerous questions as to the possible interpretation ofthis behaviour. It is clear that prehistoric craftsmen …
Graphitically encapsulated cobalt nanocrystal assemblies
2010
Graphitically encapsulated cobalt nanocrystal assemblies are chemically prepared by one-pot reaction at380 degrees C followed by a reversed etching process to produce porous graphitic structure for revealing their self-assembling nature.
Insect oviposition induces volatile emission in herbaceous plants that attracts egg parasitoid
2003
SUMMARYThe egg parasitoid Trissolcus basalis (Wollaston) (Hymenoptera:Scelionidae) responded to synomones emitted by leguminous plants induced by feeding and oviposition activity of the bug Nezara viridula (L.)(Heteroptera: Pentatomidae). This was shown by laboratory bioassays using a Y-tube olfactometer. Broad bean leaves (Vicia faba L.) damaged by feeding activity of N. viridula and on which host egg mass had been laid produced synomones that attracted T. basalis. By contrast,undamaged leaves or feeding-damaged leaves without eggs did not attract wasp females. French bean plants (Phaseolus vulgaris L.) also emitted attractive synomones when they were damaged by host feeding and carrying e…