177,883 research outputs found
Estensioni Supersimmetriche del Modello Standard e Meccanismo di Stuckelberg
No full textTesi di Laurea quadriennale di S. Morelli.
Relatore C. Coriano
An upgraded version of the Eta Model applied to Antarctic case studies
No full textUpgrades have been implemented over a number of years in an open source version of the Eta Model, posted at its CPTEC web site (http://etamodel.cptec.inpe.br/). They were summarized in Mesinger et al. (2011) and examined in detail in Mesinger et al.( 2012). In short: within dynamics, two major upgrades are the introduction of "sloping steps" and the use of the piecewise-linear vertical advection of dynamic variables. Several refinements on the calculation of exchange coefficients, conservation in the vertical diffusion, and diagnostic calculation of 10-m winds have been made. Vapor and hydrometeor loading in the hydrostatic equation were included. Within physics, efforts in refining the two Eta convection schemes received most attention. This recent version of the Eta Model has been applied to polynya events, accompanied by katabatic wind, at Terra Nova Bay (TNB), Antarctica. The TNB polynya is an area of coupling between the components of the sea ice-ocean-atmosphere system. Locally enhanced surface exchange processes are considered to have important consequences for the atmosphere (Morelli, 2011) and ocean processes, as well as for ice formation and the associated brine release. Adjustments of the Eta pre-processor have been made to allow for the distinctive polar conditions and for the use of ECMWF data as initial and boundary conditions. It is also being developed a thermodynamic model of sea ice interaction for a more realistic treatment of the sea ice-atmosphere. The numerical simulations have a horizontal resolution of about 8 Km. The results will be compared with observational data at the surface, with soundings and satellite images. The observations, used for the comparison, are available by Antarctic Meteorological Research Center, Space Science and Engineering Center, University of Wisconsin-Madison and the Programma Nazionale di Ricerche in Antartide (P.N.R.A.), Osservatorio Meteo-Climatologico.F Mesinger, Chou S C, Gomes J, Jovic D, Lazic L, Lyra A, Bustamante J, Bastos P, Morelli S, Ristic I (2011) An upgraded Version of the Eta Model. Geophysical Research Abstracts Vol. 13, EGU2011-3753-1.F Mesinger, Chou S C, Gomes J, Jovic D, Lazic L, Lyra A, Bustamante J, Bastos P, Morelli S, Ristic I (2012) An upgraded Version of the Eta Model.. Accepted for publication in Meteorol. Atmos Phys.S Morelli (2011) A modeling study of an Antarctica polynya event Meteorol Atmos Phys, 114:67-81 DOI 10.1007/s00703-011-0157-
Invenustus amator: una analisi di Catull. 69 e 71.
No full textUna analisi dei carmi 69 e 71 di Catullo, sotto il profilo testuale, linguistico e storico-letterario. Il personaggio dell’‘amante sgraziato’ viene caratterizzato in modo un po’ differente nei due carmi, ricorrendo in entrambi i casi al motivo scommatico dei fetori corporei, di cui si ricostruiscono i presupposti nella poesia greco-latina, da Ipponatte (fr. 116, 8 W. = 196, 8 Degani) alla commedia greca (Aristoph. Pax 810-813; Ach. 848-853), all’epigramma greco (Lucill. AP 11, 239-240), fino ai poeti latini (Plaut. Most. 38-41; Pseud. 737-738; Lucil. 1067 M. etc.). Gli effetti caratterizzanti del tema della gotta, nel c. 71, rimandano a un quadro di dissolutezza e di deboscia, di cui la podagra è effetto diretto (cfr. nell’epigramma greco già Edilo, AP 11, 414, e poi Nicarch. AP 5, 39 e Strato AP 12, 243), sicché sembra farsi più caustica e mordace, probabilmente rispetto allo stesso bersaglio (il Rufus del c. 69) la satira dei vizi morali
A new and efficient route to the synthesis of pyrazole and pyrimidine C-nucleoside derivatives
No full textA new route to the synthesis of pyrazole and pyrimidine C-nucleosides, involving as the key step a metal catalysed reaction of beta-D-ribofuranosyl ketoesters with alkyl cyanoformates, is described. 2,3,5-Tri-O-benzoyl-beta-D-ribofuranosyl cyanide (1) reacts with alpha-bromoesters, in the presence of zinc dust, to give beta-D-ribofuranosyl-enaminoesters 2 which are easily hydrolised to beta-ketoesters 3. The reactions of compounds 3 with alkyl cyanoformates, in the presence of catalytic amounts of [Cu(acac)(2)], afford C-glycosyl enaminoketosters 4. These compounds react with benzylhydrazine and acetamidine to give pyrazole and pyrimidine C-nucleosides 5 and 6 respectively. (C) 1998 Elsevier Science Ltd. All rights reserved
Synthesis of pyrazole C-nucleosides via Tin(IV) chloride-promoted reactions of beta-D-ribofuranosyl cyanide with beta-dicarbonyl compounds
No full text2,3,5-Tri-O-benzoyl-beta-D-ribofuranosyl cyanide reacts with methyl acetoacetate and diethyl malonate in the presence of stoichiometric amounts of SnCl4 to give a beta-D-ribofuranosyl-enaminoketoester and a beta-D-ribofuranosyl-enaminodiester, respectively. The beta-D-ribofuranosyl-enaminoketoester was debenzoylated, treated with 2,2-dimethoxypropane and tert-butyl-dimethylsilyl chloride to give the methyl 3-amino-3-(5'-O-tert-butyldimethylsilyl-2',3'-O-isopropylidene-beta-D-ribofuranosyl)-2-acetyl propanoate obtained in good yield together with small amounts of its alpha-anomer. The reactions of the beta-anomer with hydrazine, methyl- and phenylhydrazine carried out under controlled experimental conditions, afforded the pyrazole C-nucleosides in good yields as beta-anomers. (C) 2002 Elsevier Science Ltd. All rights reserved
Della dazione in pagamento - vol. 1
No full textPadova : Drucker & Senigaglia ; Verona : Carlo Drucker, 1888
Dedica ms dell'A ad Alberto Morelli sulla c. di guardia ant. Timbro: avv. Alberto Morelli in cop.
http://catalogo.unipd.it/F?func=find-c&ccl_term=IDN=MIL0442413&local_base=SBP0
Della dazione in pagamento - vol. 1
No full textPadova : Drucker & Senigaglia ; Verona : Carlo Drucker, 1888
Dedica ms dell'A ad Alberto Morelli sulla c. di guardia ant. Timbro: avv. Alberto Morelli in cop.
http://catalogo.unipd.it/F?func=find-c&ccl_term=IDN=MIL0442413&local_base=SBP0
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