118,830 research outputs found
Detailed characterization of the early x-ray emission of a plasma produced by point-like laser irradiation of solid Al targets
No full textA study of the dynamics of the x-ray emission from a point-like Al plasma produced by tight-focusing laser irradiation of a thick target is reported. Two-dimensional maps of the x-ray emission calculated at selected wavelengths show that, due to the rapid expansion cooling, x-ray emission mostly originates from a thin spatial layer. These properties enabled the results of the simulations to be compared with time-resolved x-ray spectra obtained under well-controlled experimental conditions. The outcome of this comparison is discussed in details, in view of the results reported in a recently published Letter [L. A. Gizzi, C. A. Cecchetti, M. Galimberti, A. Giulietti, D. Giulietti, L. Labate, S. Laville, and B. Tomassini, Phys. Plasmas 10, 4601 (2003)]. Moreover, the x-ray-reabsorption issues and the role of the Doppler decoupling mechanism in the presence of the strong velocity gradient typical of our experimental condition are discussed, also in view of a possible dedicated experiment. (c) 2005 American Institute of Physics
A Measure of Core Inflation in the UK
No full textWe develop a measure of core inflation in the UK over the period January1987 - December 1998, following the work of Bryan and Cecchetti (1996),Bryan, Cecchetti and Wiggins (1997) and Roger (1997). Disaggregation is into85 price categories. Given the high kurtosis of the price change distribution over this period, a trimmed mean is a more robust estimator of core inflation than other published measures such as the RPIX widely used in the UK, in particular by the Bank of England when targeting inflation. We discuss the relative advantages of our measure of core inflation, with emphasis on the determination of an optimal trimming point and on the analysis of the products whose price changes are excluded from our measure in each time period. The resulting measure appears well behaved, but differs noticeably from a number of published measures.
The ECJ’s Approach to Dual Preliminarity 5 Years after the ITCC’s Judgment no 269/2017
No full textThis article examines the European Court of Justice (ECJ)’s perspective on dual preliminarity (doppia pregiudizialità) five years after the notorious obiter dictum of the Italian Constitutional Court (ItCC) in its judgment No. 269/2017. More precisely, the article aims at unravelling the essential requirements that any such “triangular” relation (between ordinary national courts, national Constitutional Courts, and the Kirchberg Court) shall satisfy to comply with European Union (EU) law. This analysis builds both on the “classics” and on the recent cases involving (blatant or disguised) restrictions on Hungarian and Romanian judges to refer to the ECJ or apply EU law. Against this backdrop, the compatibility of the current configuration of dual preliminarity in Italy with EU law will be assessed. Although a specific assessment in this regard has not been carried out by the ECJ (yet?), we contend that the refinements and adjustments in the more recent ItCC’s case-law have remedied the main issues envisaged in the obiter dictum. Therefore, the current configuration seems to pose no serious threats to the EU systemic principles involved nor to EU law’s uniformity, coherence, and effectiveness. Indeed, provided that national judges continue to enjoy the actual power to refer freely to the ECJ and immediately set aside national law provisions incompatible with EU law rules, the ECJ has adopted a “secularist” approach and respects the Member States’ constitutional models. This article also argues that the early-stage involvement of ItCC’s (“first word”) in the dialogue with the ECJ may well serve the interests of a composite and pluralist system of fundamental rights protection in the EU. We will offer as an example the recent case on the Italian rules on childbirth and maternity allowances, which marks a step down the path of a “cooperative” dialogue between the two courts and shows the potentialities (and the little drawbacks) of such an early involvement
Money, Banking, and Financial Markets -5/E.
No full textCecchetti & Schoenholtz\u27s Money, Banking, and Financial Markets stays relevant and interesting through the text\u27s unique emphasis on the Five Core Principles, the early introduction of risk, an integrated global perspective, and the integration of FRED data in the text and problem material. By focusing on the big picture via core principles, Cecchetti & Schoenholtz teaches students the rationale for financial rules and institutional structure so that even when the financial system evolves, students\u27 knowledge will not be out of date. Be sure to visit the author blog at www.moneyandbanking.com for short, informed discussions on issues in the news, as well as technical points relevant for instructors and students alike.
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The master of the Russian ballet (the memoirs of Cav. Enrico Cecchetti)
No full textThe master of the Russian ballet (the memoirs of Cav. Enrico Cecchetti) by Olga Racster. With an introduction by Anna Pavlova. With eight illustrations on art paper.
xiii p., 1 l., 301, [3] p. incl. front. (port.) plates. 24 cm
Improving the QoS of IEEE 802.11e networks through imprecise computation
No full textIEEE 802.11e HCCA reference scheduler is based on fixed value parameters that do not adapt to traffic changes, thus quality of service (QoS) for multimedia applications is a challenge, especially in the case of variable bit rate (VBR) streams, that requires dynamic resource assignment. This paper is focused on immediate dynamic TXOP HCCA (IDTH) scheduling algorithm and its new evolution immediate dynamic TXOP HCCA plus (IDTH+). Their reclaiming mechanisms, refined by the monitoring of transmission duration, aim at overcoming the limits of fixed preallocation of resources by varying the stations transmission time and avoiding waste of resources. Simulations and theoretical analysis based on the imprecise computation model show that the integration of IDTH and IDTH+ can achieve improved network performance in terms of transmission queues length, mean access delay and packets drop rate, and to efficiently manage bursty traffic. Moreover, the performance improvements of IDTH+ with respect to IDTH are highlighted
Commento agli articoli 62 e 63 del d.lgs. 11 maggio 1999, n. 152, modificato e integrato dal d.lgs. 18 agosto 2000, n. 258
No full textRotons and roton wave packets in superfluid He-4
No full textWe give new information on the excitations in superfluid He-4. By a variational computation we obtain a very accurate description of the excitations; the energy spectrum has deviation from experiment at the level of 5%. The first microscopic study of roton wave packets is presented. R(+) and R(-) rotons cannot be described as single particle excitations due to interference effects between neighboring atoms. The roton minimum corresponds to the special wave vector where this interference disappears and the local density and momentum essentially coincide with those of a single particle excitation
2nd International Workshop on Smart Agriculture for the environmental emergency (SmartAgr) Welcome message from Workshop Chairs
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