204,391 research outputs found
Angela Donati, Ricerche su M. Gavio Massimo ; Angela Donati, Tecnica e cultura dell' officina epigrafica brundisina
No full textDevijver Hubert. Angela Donati, Ricerche su M. Gavio Massimo ; Angela Donati, Tecnica e cultura dell' officina epigrafica brundisina. In: L'antiquité classique, Tome 40, fasc. 1, 1971. pp. 335-336
Angela Donati, Ricerche su M. Gavio Massimo ; Angela Donati, Tecnica e cultura dell' officina epigrafica brundisina
No full textDevijver Hubert. Angela Donati, Ricerche su M. Gavio Massimo ; Angela Donati, Tecnica e cultura dell' officina epigrafica brundisina. In: L'antiquité classique, Tome 40, fasc. 1, 1971. pp. 335-336
Riforma Cartabia. Le modifiche al sistema penale. Nuove dinamiche del procedimento penale
No full textIl volume affronta analiticamente e in chiave sistematica le numerose novità della riforma Cartabia che interessano il procedimento penale, a partire da quelle relative alle indagini preliminari, ai riti alternativi e al giudizio di prime cure sino alle impugnazioni. L’approccio metodologico prescelto consente al lettore di inquadrare le singole norme nel contesto del disegno complessivo di una riforma che ruota sul virtuoso binomio composto, da un lato, dal principio di buon andamento della macchina giudiziaria e, dall’altro, dall’imperativo di intangibilità dei diritti fondamentali dell’accusato
Vitaliano Donati, in Venezia e l’Egitto. Catalogo della mostra, a cura di E. M. Dal Pozzolo, R. Dorigo e M. P. Pedani, Skira, Milano, 2011, p. 329
No full textSi ricostruisce la vicenda intellettuale di Vitaliano Donati naturalista e scienziato attivo fra Padova e Torino a metà settecento e iniziatore delle collezioni egittologiche torinesi
Physics-based large-signal sensitivity analysis of microwave circuits using technological parametric sensitivity from multidimensional semiconductor device models
No full textThe authors present an efficient approach to evaluate the large-signal (LS) parametric sensitivity of active semiconductor devices under quasi-periodic operation through accurate, multidimensional physics-based models. The proposed technique exploits efficient intermediate mathematical models to perform the link between physics-based analysis and circuit-oriented simulations, and only requires the evaluation of dc and ac small-signal (dc charge) sensitivities under general quasi-static conditions. To illustrate the technique, the authors discuss examples of sensitivity evaluation, statistical analysis, and doping profile optimization of an implanted MESFET to minimize intermodulation which makes use of LS parametric sensitivities under two-tone excitatio
Compact conversion and cyclostationary noise modelling of pn junction diodes in low-injection - Part I: Model derivation
No full textStarting from the well known low-injection approximation, a closed form, analytical compact model is derived for the small-signal (SS) and forced quasi-periodic operation of junction diodes. The model determines the small-signal and conversion admittance matrix of the device as a function of the applied (dc or periodic-time varying) bias. Noise characteristics, in both the stationary (SS) and cyclostationary cases, are also evaluated by means of a Green's function approach
Effects of M dwarf magnetic fields on potentially habitable planets
No full textA.A.V. acknowledges support from the Royal Astronomical Society through a post-doctoral fellowship. J.M. acknowledges support from a fellowship of the Alexander von Humboldt foundation. P.L. acknowledges funding from a STFC scholarship. AJBR is a Research Fellow of the Royal Commission for the Exhibition of 1851.We investigate the effect of the magnetic fields of M dwarf (dM) stars on potentially habitable Earth-like planets. These fields can reduce the size of planetary magnetospheres to such an extent that a significant fraction of the planet’s atmosphere may be exposed to erosion by the stellar wind. We used a sample of 15 active dM stars, for which surface magnetic-field maps were reconstructed, to determine the magnetic pressure at the planet orbit and hence the largest size of its magnetosphere, which would only be decreased by considering the stellar wind. Our method provides a fast means to assess which planets are most affected by the stellar magnetic field, which can be used as a first study to be followed by more sophisticated models. We show that hypothetical Earth-like planets with similar terrestrial magnetisation (~1 G) orbiting at the inner (outer) edge of the habitable zone of these stars would present magnetospheres that extend at most up to 6 (11.7) planetary radii. To be able to sustain an Earth-sized magnetosphere, with the exception of only a few cases, the terrestrial planet would either (1) need to orbit significantly farther out than the traditional limits of the habitable zone; or else, (2) if it were orbiting within the habitable zone, it would require at least a magnetic field ranging from a few G to up to a few thousand G. By assuming a magnetospheric size that is more appropriate for the young-Earth (3.4 Gyr ago), the required planetary magnetic fields are one order of magnitude weaker. However, in this case, the polar-cap area of the planet, which is unprotected from transport of particles to/from interplanetary space, is twice as large. At present, we do not know how small the smallest area of the planetary surface is that could be exposed and would still not affect the potential for formation and development of life in a planet. As the star becomes older and, therefore, its rotation rate and magnetic field reduce, the interplanetary magnetic pressure decreases and the magnetosphere of planets probably expands. Using an empirically derived rotation-activity/magnetism relation, we provide an analytical expression for estimating the shortest stellar rotation period for which an Earth-analogue in the habitable zone could sustain an Earth-sized magnetosphere. We find that the required rotation rate of the early- and mid-dM stars (with periods ≳37–202 days) is slower than the solar one, and even slower for the late-dM stars (≳63–263 days). Planets orbiting in the habitable zone of dM stars that rotate faster than this have smaller magnetospheric sizes than that of the Earth magnetosphere. Because many late-dM stars are fast rotators, conditions for terrestrial planets to harbour Earth-sized magnetospheres are more easily achieved for planets orbiting slowly rotating early- and mid-dM stars.Peer reviewe
Microstructure analysis of aluminum extrusion: Prediction of microstructure on AA6060 alloy
No full textAn experimental–numerical procedure for predicting the recrystallized structure in aluminumextrusion
is presented here, altogether with its validation. The whole plan is carried
out in three steps: in the first step, the evolution of microstructure of an AA6060 alloy during
deformationwas studied by means of small-scale laboratory test, the processing parameters
being chosen in order to reproduce the typical industrial conditions. In the second step, the
analysis of microstructure evolution after the heat treatment (550 ◦C for 30 min and 180 ◦C
for 10 h)was analyzed, the obtained informations being used in order to fit a recrystallization
model to be implemented inside the Deform FEM code environment. Finally, in the third step,
the obtained informations are applied to extrusion tests presented in another papers by the
authors (Schikorra, M., Donati, L., Tomesani, L., Tekkaya, A.E. 2007a. Microstructure analysis
of aluminum extrusion: grain size distribution in AA6060, AA6082 and AA7075 alloys, J.
Mech. Sci. Technol. 21, 1445–1451); the simulation results are compared and discussed with
the experimental grain size distribution analyzed on the extruded rest
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