1,721,042 research outputs found
L'arte conquistata. Spoliazioni napoleoniche dalle chiese della legazione di Urbino e Pesaro
No full textArte a Fano al tempo dei "piattelletti"
Full text linkIllustrazione della situazione figurativa di Fano nei primi anni del Cinquecento con l'influsso esercitato dalle opere di Giovanni Santi e Pietro Perugino nella cultura locale
Sulle tracce di collezioni e quadrerie a Fano nel Settecento
No full textIl contributo, inserito all'interno del catalogo di una mostra dedicata alle opere settecentesche conservate nella Pinacoteca Civica di Fano e ai pittori legati a questa città, indaga le collezioni appartenute ad alcune famiglie nobili del luogo. Attraverso lo spoglio dei documenti emerge un panorama collezionistico ricco e vivace e al contempo si coglie la spiccata sensibilità da parte dei committenti nei confronti della promozione degli artisti, che la nobiltà fanese sostiene con elargizioni volte alla formazione dei più giovani
Tool Wear in Cutting Operations: Experimental Analysis and Analytical Models
No full textThe possibility of predicting the amount of the tool wear in machining processes is an interesting topic for industries, since tool wear affects surface integrity of the final parts and tool life is strictly connected with substitution policy and production costs. The definition of models able to correctly forecast the tool wear development is an important topic in the research field. For this reason in the present work, a comparison between response surface methodology (RSM) and artificial neural networks (ANNs) fitting techniques in tool wear forecasting was performed. For developing these predictive models, experimental values of tool wear, obtained by longitudinal turning operations with variable cutting parameters, were collected. Once selected, the best configuration of the two previously mentioned techniques, the resultant errors with respect to experimental data were estimated and then compared. The results showed that the developed models are able to predict the amount of wear. The comparison demonstrated that ANNs give better approximation than RSM in the prediction of the amount of the flank wear (VB) and of the crater wear (KT) depth. The obtained results are interesting not only from a scientific point of view but also for industries. In fact, it should be possible to implement the best model into a production manager software in order to correctly define the tool change during the lot production
3. Pietro Vannucci, detto Perugino e collaboratori (Città della Pieve, 1450 circa - Fontignano di Perugia, 1523), Predella con storie della vita della Vergine
No full textIl contributo del mercato artistico marchigiano alla formazione della collezione bolognese di Filippo di Marcantonio Hercolani
No full textL’arte rubata: furti e vendite illecite nella provincia di Pesaro e Urbino tra 19. e 20. secolo
No full textAnalisi di alcuni casi di furti connessi al fenomeno della vendita illecita di opere d'arte nella Provincia di Pesaro e Urbino, tra XIX e XX secolo: un reliquiario d'argento smaltato e cesellato dalla chiesa di San Francesco a Mercatello sul Metauro, il tentato furto della Predella con Storie della Vergine della Pala di Fano del Perugino nel momento di dibattito critico sulla sua attribuzione al giovane Raffaello, il distacco di un affresco attribuito a Giovanni Santi da una privata abitazione di Cagli ed il furto di un polittico d'età laurenziana dalla chiesa di Santa Susanna in Villagrande di Mombaroccio
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Influence of Material Microstructures in Micromilling of Ti6Al4V Alloy
No full textIn the most recent decades the introduction of unconventional machining processes allowed the development of micromachining techniques. In this work, the influence of material microstructures on the micromilling process was investigated. Ti6Al4V alloy was selected as workpiece material since it is a very common material for micro applications and because its duplex microstructure can be easily changed by proper thermal treatments. Four different microstructures (namely bimodal, fully equiaxed, fully lamellar and mill annealed) were obtained through recrystallization annealing treatments carried out at different times and temperatures. The mechanical properties of the samples were assessed by microhardness measurements. Nano-indentations were also performed on single grains to understand how the different hardness of phases and structures present in the Ti6Al4V alloy can affect the micromilling process. Microchannels using two flute flat end mills with a diameter equal to 200 ??m were realized on the treated samples. Two different feed-per-tooth values were used during the tests. Cutting force, channel shape and burr dimension were investigated. Morphological and energy dispersive spectroscopy (EDS) analyses were performed on tools by means of a scanning electron microscope (SEM): in this way the phenomena mainly influencing the tool status were also identified. Lower cutting forces and reduced tool wear were observed when working fully lamellar microstructures compared to the other ones
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