Non-linear Quantization of Integrable Classical Systems

It is demonstrated that the so-called "unavoidable quantum anomalies" can be avoided in the farmework of a special non-linear quantization scheme. A simple example is discussed in detail.Comment: LaTeX, 14 p

Discretization of Information Collecting Situations and Continuity of Compensation Rules

A canonical procedure is described, which associates to each infinite information collecting situation a related information collecting situation with finite state and action spaces, in such a way that the two corresponding IC-games are near to each other.Compensations for informants are then also near to each other in the two IC-situations, if they are based on continuous compensation rules.cooperative games;information

Il DM 93/2017 sui controlli degli strumenti di metrologia legale

Questo articolo analizza il recente Decreto Ministeriale che disciplina le verifiche periodiche sugli strumenti di misura impiegati in metrologia legale. Vengono discussi gli aspetti giuridici e metrologici, e si mostra come la palese mancanza di competenze metrologiche con cui sono stati redatti gli allegati tecnici rischi seriamente di compromettere e vanificare tutto ciò che di buono è stato introdotto, dal punto di vista specificatamente giuridico, in questo delicato settore

Assessment of regeneration and transformation in sweet cherry cultivars

The sheer size of the tree is still one of the most relevant cherry-growing related problems. Genetic transformation with phytochrome genes could contribute to the reduction of tree size in cherry. The responses to morphogenesis and genetic transformation were compared in two sweet cherry commercial cultivars and the characterised somaclone HS. Axenic shoot cultures of \u2018Hedelfinger\u2019, \u2018Lapins\u2019 and somaclone HS were grown on BA (6-benzylaminopurine) containing medium. The apical portion of each shoot was cultured in the presence of BA and NAA (naphthalene acetic acid) in the dark. After two weeks the callus formed at the base of each shoot, a 3-4 mm upper stem portion deprived of axillary shoots/buds and intact leaves were subcultured on regeneration medium, in the light. A. tumefaciens (C58C1 pGV3850), carrying the p35SGUSIntron binary vector was used to infect shoots deprived of unfolded leaves and lateral buds by either full immersion or basal dipping in the bacterium suspension. After 21 days under light, all tested explants, except \u2018Lapins\u2019 stems, showed regeneration ability. All reached their maximum regenerative expression within 56 days and \u2018Lapins\u2019 basal callus scored the highest regeneration percentage (50.1%). Basal dipping was chosen as the optimal system to infect the two cultivars and the somaclone which showed a different attitude to produce morphogenic callus. The morphogenic masses kept growing on 50 mg L-1 kanamicine for 40 weeks and the first shoots started to elongate when the BA was reduced by one-fourth. GUS activity was found in the shoot basal cuts and surrounding tissues and this evidence let us deduce that hypothetically transformed cells had chances to take part in either direct or indirect morphogenesis

Measuring the process efficiency of controlled gas metal arc welding processes

The thermal or process efficiency in gas metal arc welding (GMAW) is a crucial input to numerical models of the process and requires the use of an accurate welding calorimeter. In this paper, the authors compare a liquid nitrogen calorimeter with an insulated box calorimeter for measuring the process efficiency of Fronius cold metal transfer, Lincoln surface tension transfer and RapidArc, Kemppi FastRoot and standard pulsed GMAW. All of the controlled dip transfer processes had a process efficiency of ∼85% when measured with the liquid nitrogen calorimeter. This value was slightly higher when welding in a groove and slightly lower for the RapidArc and pulsed GMAW. The efficiency measured with the insulated box calorimeter was slightly lower, but it had the advantage of a much smaller random err

Uncertainty quantification for mineral precipitation and dissolution in fractured porous media

In this work we present an uncertainty quantification analysis to determine the influence and importance of some physical parameters in a reactive transport model in fractured porous media. An accurate description of flow and transport in the fractures is key to obtain reliable simulations, however, fractures geometry and physical characteristics pose several challenges from both the modeling and implementation side. We adopt a mixed-dimensional approximation, where fractures and their intersections are represented as objects of lower dimension. To simplify the presentation, we consider only two chemical species: one solute, transported by water, and one precipitate attached to the solid skeleton. A global sensitivity analysis to uncertain input data is performed exploiting the Polynomial Chaos expansion along with spectral projection methods on sparse grids