4,043 research outputs found
Grotta del Cavallo (scavi Sarti). Tradizione e innovazione nella sequenza musteriana sulla base dell’indicatore litico
No full textGli Autori illustrano una sintesi dei risultati dello studio sui complessi litici musteriani relativi ad alcuni step della sequenza stratigrafica (strati M, L, F). Sono evidenziati gli elementi tecno-tipologici che connotano i tre macro-orizzonti cronoculturali, gli elementi che indicano una tradizione lungo la sequenza medesima e i caratteri innovativi che segnano l'inizio di nuove tendenze comportamentali
The Bell Beaker Tumulus on Via Bruschi in Sesto Fiorentino: new researches
No full textThe archaeological area of Via Bruschi, already noted for some twenty years as a centre of ritual (Sarti et al. 1987-1988), is among the settlement evidence for Developed Bell Beaker Step 3 (Leonini, Sarti 2008). The study of Bell Beaker settlements in the Florentine area has been carried out through analysis of their relationship to the landscape of the past, by attempting to reconstruct its settings and its sequence of changes identified at a local level. The analysis of the spatial, chronological and functional relationships of the settlement and ritual findings (rendered interactive and dynamic by use of GIS) must, in fact, include the evaluation of the presumed relationships and contacts between the excavated structures. These relationships are not identifiable, at the present time, in a direct way because of the limitations of field research. For this reason, a hypothesis already proposed earlier (Sarti, Martini 2001) has been confirmed for two Bell Beaker areas. Furthermore, it is valid in general on a territorial scale (Pizziolo, Sarti 2006) or where it is possible to apply the concept of “Settlement Unit” (Pizziolo, Sarti 2008). This concept refers to a large context, within which different structural finds can be recognized, belonging to different phases during which the same space was in use. It includes large settlement nuclei (Settlement Units), with functional structures and substructures, all of long duration with the re-use of areas in the close vicinity; Via Bruschi is related to a group of two large settlement areas, Sassaiola and Frilli, referred to as Developed Bell Beaker
Superrigidity of maximal measurable cocycles of complex hyperbolic lattices
No full textLet Γ be a torsion-free lattice of PU(p, 1) with p≥ 2 and let (X, μX) be an ergodic standard Borel probability Γ -space. We prove that any maximal Zariski dense measurable cocycle σ: Γ × X⟶ SU(m, n) is cohomologous to a cocycle associated to a representation of PU(p, 1) into SU(m, n) , with 1 ≤ m≤ n. The proof follows the line of Zimmer’ Superrigidity Theorem and requires the existence of a boundary map, that we prove in a much more general setting. As a consequence of our result, there cannot exist maximal measurable cocycles with the above properties when 1 < m< n
Lo sfruttamento lavorativo delle donne ex art. 603-bis nella giurisprudenza più recente: i perduranti limiti dell’approccio penalistico
No full textQualità della carne e del grasso di agnelli Appenninici, Comisani e loro meticci in funzione della dieta post-svezzamento e dell’età di macellazione
No full textWhy do people use instant messaging and social networking apps? An investigation from Italian mobile app users
No full textI carotaggi MAPPA: un’integrazione interdisciplinare/MAPPA cores: an interdisciplinary approach
No full textUna consistente campagna di acquisizione di dati di sottosuolo (18 carotaggi con profondità da 7 a 15 m) condotta con approccio interdisciplinare, finalizzato a una rappresentazione integrata del log stratigrafico, ha permesso di incrementare in modo significativo le conoscenze del contesto paleoambientale ed insediativo
della zona urbana e suburbana della città di Pisa durante gli ultimi 6000 anni circa e di valutare il reciproco condizionamento fra l’ambiente naturale e le caratteristiche dell’insediamento umano/In the urban and periurban area of Pisa, 18 cores ranging in depth between 7 and 15 m were performed and analysed through an interdisciplinary approach, which led to an improved stratigraphic log representation. In the urban and periurban area of Pisa, 18 cores ranging in depth between 7 and 15 m were performed and analysed through an interdisciplinary approach, which led to an improved stratigraphic log representation
Multiexciton complex from extrinsic centers in AlGaAs epilayers on Ge and Si substrates
No full textThe multiexciton properties of extrinsic centers from AlGaAs layers on Ge and Si substrates are addressed. The two photon cascade is found both in steady state and in time resolved experiments. Polarization analysis of the photoluminescence provides clearcut attribution to neutral biexciton complexes. Our findings demonstrate the prospect of exploiting extrinsic centers for generating entangled photon pairs on a Si based device.Sarti, F.; Muñoz Matutano, G.; Bauer, D.; Dotti, N.; Bietti, S.; Isella, G.; Vinattieri, A.... (2013). Multiexciton complex from extrinsic centers in AlGaAs epilayers on Ge and Si substrates. Journal of Applied Physics. 114(22):2243141-2243143. doi:10.1063/1.4844375S2243141224314311422Kimble, H. J. (2008). The quantum internet. Nature, 453(7198), 1023-1030. doi:10.1038/nature07127Bouwmeester, D., Pan, J.-W., Mattle, K., Eibl, M., Weinfurter, H., & Zeilinger, A. (1997). Experimental quantum teleportation. Nature, 390(6660), 575-579. doi:10.1038/37539Shields, A. J. (2007). Semiconductor quantum light sources. Nature Photonics, 1(4), 215-223. doi:10.1038/nphoton.2007.46Akopian, N., Lindner, N. H., Poem, E., Berlatzky, Y., Avron, J., Gershoni, D., … Petroff, P. M. (2006). Entangled Photon Pairs from Semiconductor Quantum Dots. Physical Review Letters, 96(13). doi:10.1103/physrevlett.96.130501Dousse, A., Suffczyński, J., Beveratos, A., Krebs, O., Lemaître, A., Sagnes, I., … Senellart, P. (2010). Ultrabright source of entangled photon pairs. Nature, 466(7303), 217-220. doi:10.1038/nature09148Cavigli, L., Bietti, S., Accanto, N., Minari, S., Abbarchi, M., Isella, G., … Sanguinetti, S. (2012). High temperature single photon emitter monolithically integrated on silicon. Applied Physics Letters, 100(23), 231112. doi:10.1063/1.4726189Accanto, N., Minari, S., Cavigli, L., Bietti, S., Isella, G., Vinattieri, A., … Gurioli, M. (2013). Kinetics of multiexciton complex in GaAs quantum dots on Si. Applied Physics Letters, 102(5), 053109. doi:10.1063/1.4790148Kurtsiefer, C., Mayer, S., Zarda, P., & Weinfurter, H. (2000). Stable Solid-State Source of Single Photons. Physical Review Letters, 85(2), 290-293. doi:10.1103/physrevlett.85.290Brouri, R., Beveratos, A., Poizat, J.-P., & Grangier, P. (2000). Photon antibunching in the fluorescence of individual color centers in diamond. Optics Letters, 25(17), 1294. doi:10.1364/ol.25.001294Strauf, S., Michler, P., Klude, M., Hommel, D., Bacher, G., & Forchel, A. (2002). Quantum Optical Studies on Individual Acceptor Bound Excitons in a Semiconductor. Physical Review Letters, 89(17). doi:10.1103/physrevlett.89.177403Muller, A., Bianucci, P., Piermarocchi, C., Fornari, M., Robin, I. C., André, R., & Shih, C. K. (2006). Time-resolved photoluminescence spectroscopy of individual Te impurity centers inZnSe. Physical Review B, 73(8). doi:10.1103/physrevb.73.081306Sanaka, K., Pawlis, A., Ladd, T. D., Sleiter, D. J., Lischka, K., & Yamamoto, Y. (2012). Entangling Single Photons from Independently Tuned Semiconductor Nanoemitters. Nano Letters, 12(9), 4611-4616. doi:10.1021/nl301911tIkezawa, M., Sakuma, Y., Zhang, L., Sone, Y., Mori, T., Hamano, T., … Masumoto, Y. (2012). Single-photon generation from a nitrogen impurity center in GaAs. Applied Physics Letters, 100(4), 042106. doi:10.1063/1.3679181Minari, S., Cavigli, L., Sarti, F., Abbarchi, M., Accanto, N., Muñoz Matutano, G., … Gurioli, M. (2012). Single photon emission from impurity centers in AlGaAs epilayers on Ge and Si substrates. Applied Physics Letters, 101(17), 172105. doi:10.1063/1.4761939Marcet, S., Ouellet-Plamondon, C., Éthier-Majcher, G., Saint-Jean, P., André, R., Klem, J. F., & Francoeur, S. (2010). Charged excitons and biexcitons bound to isoelectronic centers. Physical Review B, 82(23). doi:10.1103/physrevb.82.235311Jo, M., Mano, T., Kuroda, T., Sakuma, Y., & Sakoda, K. (2013). Visible single-photon emission from a nitrogen impurity center in AlAs. Applied Physics Letters, 102(6), 062107. doi:10.1063/1.4792315Abbarchi, M., Mastrandrea, C., Kuroda, T., Mano, T., Vinattieri, A., Sakoda, K., & Gurioli, M. (2009). Poissonian statistics of excitonic complexes in quantum dots. Journal of Applied Physics, 106(5), 053504. doi:10.1063/1.3197848Kuroda, T., Sanguinetti, S., Gurioli, M., Watanabe, K., Minami, F., & Koguchi, N. (2002). Picosecond nonlinear relaxation of photoinjected carriers in a singleGaAs/Al0.3Ga0.7Asquantum dot. Physical Review B, 66(12). doi:10.1103/physrevb.66.121302Gammon, D., Snow, E. S., Shanabrook, B. V., Katzer, D. S., & Park, D. (1996). Fine Structure Splitting in the Optical Spectra of Single GaAs Quantum Dots. Physical Review Letters, 76(16), 3005-3008. doi:10.1103/physrevlett.76.3005Abbarchi, M., Mastrandrea, C. A., Kuroda, T., Mano, T., Sakoda, K., Koguchi, N., … Gurioli, M. (2008). Exciton fine structure in strain-freeGaAs/Al0.3Ga0.7Asquantum dots: Extrinsic effects. Physical Review B, 78(12). doi:10.1103/physrevb.78.125321Heiss, M., Fontana, Y., Gustafsson, A., Wüst, G., Magen, C., O’Regan, D. D., … Fontcuberta i Morral, A. (2013). Self-assembled quantum dots in a nanowire system for quantum photonics. Nature Materials, 12(5), 439-444. doi:10.1038/nmat355
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