86,638 research outputs found
Modelling and simulation of EV high-power recharging pools with stationary storage
No full textHigh-power recharging pools are going to be widely deployed on the highways to guarantee a fast recharge for electric vehicles. These infrastructures may ask the grid for significant levels of power, which the grid may not be always capable to provide. In this context, stationary storage can provide peak power during the charging session, limiting the maximum power request to the grid and avoiding the need for an upgrade to the grid connection. This paper carries out the modelling and simulation of a high-power recharging pool connected to the LV distribution network and coupled with a stationary storage system. A technical-economic analysis is conducted for two different storage configurations: high-capacity storage and peak-shaving storage. Results show that the peak-shaving solution, at present, is the most convenient. In addition, it is observed that a reduced size could still support the EV recharge, with a reasonable additional waiting time, while improving the return of the investment
Reaction of Alkynes with Iodine Monochloride Revisited
No full text6-Exo-dig and/or 7-endo-dig iodocyclization reactions
of functionalized acetylenic derivatives with ICl are
disfavored in comparison with the corresponding electrophilic
addition reactions providing regioselectively (E)-1-
chloro-2-iodoethene derivatives. On the contrary, 6-endo-dig
and 5-exo-dig iodocyclizations of methyl ynoates with ICl
seem to be favored in comparison with the corresponding
electrophilic addition reactions
Technical and economic analysis of EV high-power recharging pools equipped with storage
No full textA comprehensive network of high-power recharging points will be fundamental to enable long-distance travel for electric vehicles. However, the distribution grid may not be always capable to provide such high levels of power in every area. From this prospect, recharging pools equipped with battery storage system provide the opportunity to limit the maximum power request to the grid, avoiding the need for an upgrade to the grid connection. This solution can be implemented by means of various configuration depending on the storage system size and the relative energy management, leading to different costs. This paper carries out a technical and economic analysis of a high-power recharging pool connected to the low voltage distribution network and equipped with a stationary storage system. A simulation model developed in Modelica language is used to compare three different storage configurations. Results indicate that a peak shaving BESS is the most feasible solution. It is also observed that a reduced size would improve the profitability of the investment, supporting the EV recharge with a reasonable additional waiting time
Assessment of the Potential Shore to Ship Load Demand: The Italian Scenario
No full textIn this paper an investigation and a technical-economical assessment on the application of the port electrification in Italy is presented. The recent opening of the electricity regulations to energy community may represent a possible business case to create an economical solution for cold ironing in Italy. In order to assess this possibility, a methodology to estimate load demand, emissions and economic aspects of the ship's hotelling period in ports, is proposed. Specifically, the analysis is derived from data of Italian's maritime traffic recorded over one year. The estimations consider also fuel quality and ship category (RO-RO, Tanker, Bulk etc.). Based on the results, a first estimation of the potential impact of the operation of cold ironing in Italy is reported
Nitrogen fractionation in high-mass star-forming cores across the Galaxy
No full textThe fractionation of nitrogen (N) in star-forming regions is a poorly understood process. To put more stringent observational constraints on the N-fractionation, we have observed with the IRAM-30-m telescope a large sample of 66 cores in massive star-forming regions. We targeted the (1-0) rotational transition of HN13C, HC15N, H13CN and HC15N, and derived the 14N/15N ratio for both HCN and HNC. We have completed this sample with that already observed by Colzi et al., and thus analysed a total sample of 87 sources. The 14N/15N ratios are distributed around the Proto-Solar Nebula value with a lower limit near the TA value (∼272). We have also derived the 14N/15N ratio as a function of the Galactocentric distance and deduced a linear trend based on unprecedented statistics. The Galactocentric dependences that we have found are consistent, in the slope, with past works but we have found a new local 14N/15N value of ∼400, i.e. closer to the Prosolar Nebula value. A second analysis was done, and a parabolic Galactocentric trend was found. Comparison with Galactic chemical evolution models shows that the slope until 8 kpc is consistent with the linear analysis, while the flattening trend above 8 kpc is well reproduced by the parabolic analysis
DC3N observations towards high-mass star-forming regions
No full textWe present the study of deuteration of cyanoacetylene (HC3N) towards a sample of 28 high-mass star-forming cores divided into different evolutionary stages, from starless to evolved protostellar cores. We report for the first time the detection of DC3N towards 15 high-mass cores. The abundance ratios of DC3N with respect HC3N range in the interval 0.003-0.022, lower than those found in low-mas protostars and dark clouds. No significant trend with the evolutionary stage, or with the kinetic temperature of the region, has been found. We compare the level of deuteration of HC3N with those of other molecules towards the same sample, finding weak correlation with species formed only or predominantly in gas phase (N2H+ and HNC, respectively), and no correlation with species formed only or predominantly on dust grains (CH3OH and NH3, respectively). We also present a single-dish map of DC3N towards the protocluster IRAS 05358+3543, which shows that DC3N traces an extended envelope (similar to 0.37 pc) and peaks towards two cold condensations separated from the positions of the protostars and the dust continuum. The observations presented in this work suggest that deuteration of HC3N is produced in the gas of the cold outer parts of massive star-forming clumps, giving us an estimate of the deuteration factor prior to the formation of denser gas
Colzi, F. 2019. "Gli utilizzi dei proventi del gioco del lotto pontificio nel XVIII secolo". Open Journal of Humanities 2: 117-138.
No full textThe purpose of the contribution is to analyze the game of lotto in the Papal States between the eighteenth and nineteenth centuries, with particular attention to the economic aspect. The lotto represented a formidable means of collecting money that the pontiffs were able to use profitably by accumulating substantial monetary funds without relying on the tax burden and public debt and producing remarkable effects in the economic system. Not only the proceeds of the game filled the budget deficits, but they went on to finance two important sectors for the life of the Church State: assistance and public works
Variations on the Author
No full text“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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