1,721,319 research outputs found
Commento agli artt. 1117-quater, 1129, 1130, 1130-bis, 1131, 1132, 1133, 1134 c.c. e agli artt. 63, 64, 65, 70, 71, 71-bis, 71-ter disp. att. c.c.
No full textI commenti presentano una lettura ragionata e critica della disciplina del condominio, come modificata dalla Riforma del 2012, e degli orientamenti dottrinali e giurisprudenziali di cui i singoli contributi propongono una ricca e aggiornata rassegna
Numerical simulation of dense gas flows on unstructured grids with an implicit high resolution upwind Euler solver
No full textThe study of the dense gas flows which occur in many technological applications demands for fluid dynamic simulation tools incorporating complex thermodynamic models that are not usually available in commercial software. Moreover, the software mentioned can be used to study very interesting phenomena that usually go under the name of ‘non-classical gasdynamics’, which are theoretically predicted for high molecular weight fluids in the superheated region, close to saturation. This paper presents the
numerical methods and models implemented in a computer code named zFlow which is capable of simulating inviscid dense gas flows in complex geometries. A detailed description of the space discretization method used to approximate the Euler equations on unstructured grids and for general equations of state, and a summary of the thermodynamic functions required by the mentioned formulation are also given. The performance of the code is demonstrated by presenting two applications, the calculation
of the transonic flow around an airfoil computed with both the ideal gas and a complex equation of state and the simulation of the non-classical phenomena occurring in a supersonic flow between two
staggered sinusoidal blades. Non-classical effects are simulated in a supersonic flow of a siloxane using a Peng–Robinson-type equation of state. Siloxanes are a class of substances used as working fluids in
organic Rankine cycles turbines
Analisi dei fattori che influenzano la resistenza residua delle argille.
No full textUniversità degli Studi di Padova, Facoltà di Ingegneria, Memorie e Studi dell'Istituto di Costruzioni Marittime e di Geotecnica, Giugno 199
L'interpretazione delle prove di carico statiche sui pali strumentati.
No full textUniversità degli Studi di Padova, Facoltà di Ingegneria, Memorie e Studi dell'Istituto di Costruzioni Marittime e di Geotecnica, Febbraio 1994
Monotonic fast residual strength of clay soils.
No full textA laboratory study on the fast residual strength of clay soils is present in this paper. Laboratory tests were carried out
at the Imperial College of London with the IC/NGI ring shear apparatus, modified by Parathiras to reduce soil loss during
the very large displacements achieved under fast sliding.
The tests were carried out for two different natural plastic soils, the less plastic Cowden till and the more plastic London
clay, by using the two shearing velocities of 100 mm/min and of 1000 mm/min, in both cases. Depending on soil type, confining
stress and rate of displacement, three possible rate effects might occur during fast shearing: positive, negative and
neutral, which mean a steady state fast residual strength above, below or equal to the slow value, the latter evaluated at a
rate of displacement not exceeding 0.05-0.01 mm/min.
Initially, all samples showed a growth in strength; therefore, as displacements increased, fast residual strength might either
stabilise or decrease to a minimum. In the more plastic London clay, fast residual strength never dropped below the slow
residual value. Otherwise, depending on the applied normal stress, fast residual strength of the less plastic Cowden till
might drop well below the slow residual, so giving rise to a negative effect of fast shearing. Due to the lack of pore pressure
data within the sliding surface, test results were analysed in terms of total stress, to highlight any rate effect upon the fast
residual strength when compared to the slow residual value. The different features in the steady state fast residual strength
were also explained by soil fabric modifications nearby the sliding surface during fast sliding
Mobilità e infrastrutture di trasporto: verso uno sviluppo come promozione delle opportunità
No full textL’analisi e la pianificazione tradizionali delle reti di trasporto si basano su due
assunti, oggi contestati sia a livello teorico, sia a livello pratico: che la mobilità
sia esclusivamente un bisogno derivato, e che sviluppo e crescita economica
siano la stessa cosa.
Da un lato l’esame approfondito del concetto e dei dati sul Travel Time Budget
sembrano indicare l’esistenza di un tempo medio di viaggio giornaliero
desiderato, al quale corrisponde un’utilità. Dall’altro, il premio Nobel per
l’economia Amartya Sen ha dimostrato che l’utilità per una persona è data
dall’insieme del benessere e della libertà di agire, e che entrambi questi beni
devono essere valutati in termini di risultati e di opportunità; in tale ottica,
sviluppo significa promozione delle opportunità.
Il testo si compone di quattro paragrafi più le conclusioni. Nel primo paragrafo si
espone il legame originale che esiste tra l’infrastruttura di trasporto e la natura
umana; nel secondo e nel terzo si riassumono le conoscenze e le
interpretazioni riguardo l’esigenza di mobilità e lo sviluppo; il quarto è dedicato
alle prospettive che le nuove idee dischiudono alla pianificazione dei trasporti.
Le conclusioni costituiscono una sintesi propositiva di quanto esposto nel
lavor
Effetto delle alte velocità di scorrimento sulla resistenza residua di due terreni coesivi.
No full textCompensation effect between deaths from Covid-19 and crashes: The Italian case
Full text linkEmergencies such as the Covid-19 pandemic pose several decision-making issues, while clear evidence of successful strategies are still unavailable, different policies may be identified. However, in such emergencies, the preservation of public health, by firstly reducing human loss of life may be prioritized and then restrictive measures are implemented. The trade-off between damage due to the threat and the decrease in damage due to the lockdown is largely unexplored. Here we show that there is a degree of compensation between damage from epidemic deaths and from traffic deaths, especially in the case of immediate restrictive measures imposed by governments. Based on the Italian case, we found that damage from loss of human Capital and health care costs could have been fully compensated if the lockdown had been imposed ten days earlier. Considering only one Italian region (Puglia), where the epidemic was delayed and then restrictions were timely, damage due to loss of human Capital was largely compensated in the real scenario. However, damage due to loss of welfare could not have been fully compensated for, since Covid-19 deaths largely outnumber traffic deaths in the simulated epidemic period and loss of welfare damage is scarcely dependent on the age-at-death. From a broader perspective, societies seem to react to external threats as a whole organism, thus tending to restore the original equilibrium. Governmental decisions could accelerate this process. However, in the case of similar threats, some wounds cannot be compensated for, such as the incalculable damage due to loss of welfare
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