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Search Results: 1 - 10 of 5229 matches for " Mauro Rajteri "
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Quantum characterization of superconducting photon counters
Giorgio Brida,Luigi Ciavarella,Ivo P. Degiovanni,Marco Genovese,Lapo Lolli,Maria G. Mingolla,Fabrizio Piacentini,Mauro Rajteri,Emanuele Taralli,Matteo G. A. Paris
Physics , 2011, DOI: 10.1088/1367-2630/14/8/085001
Abstract: We address the quantum characterization of photon counters based on transition-edge sensors (TESs) and present the first experimental tomography of the positive operator-valued measure (POVM) of a TES. We provide the reliable tomographic reconstruction of the POVM elements up to 11 detected photons and M=100 incoming photons, demonstrating that it is a linear detector.
High intrinsic energy resolution photon number resolving detectors
L. Lolli,E. Taralli,C. Portesi,E. Monticone,M. Rajteri
Physics , 2013,
Abstract: Transition Edge Sensors (TESs) are characterized by the intrinsic figure of merit to resolve both the energy and the statistical distribution of the incident photons. These properties lead TES devices to become the best single photon detector for quantum technology experiments. For a TES based on titanium and gold has been reached, at telecommunication wavelength, an unprecedented intrinsic energy resolution (0.113 eV). The uncertainties analysis of both energy resolution and photon state assignment has been discussed. The thermal properties of the superconductive device have been studied by fitting the bias curve to evaluate theoretical limit of the energy resolution.
Some Observations on Indian Federalism in Comparative Perspective  [PDF]
Mauro Mazza
Beijing Law Review (BLR) , 2015, DOI: 10.4236/blr.2015.61004
Abstract: The article analyses the form of state of the federal Indian Union, which is rather atypical in the “landscape” of comparative constitutional law. The trend towards centralization of functions and powers, both at federal and state levels, probably constitutes some sort of quasi-federalism, or semi-federalism, or even unionist federalism. Indian pragmatic federalism, which we can mainly characterize as a variant of ethnic federalism, may well lead, in terms of the classification of the forms of state, to consider Indian federalism as unitary federalism, or as the realization of a sui generis unionist state.
The Prospects of Independence for Greenland, between Energy Resources and the Rights of Indigenous Peoples (with Some Comparative Remarks on Nunavut, Canada)  [PDF]
Mauro Mazza
Beijing Law Review (BLR) , 2015, DOI: 10.4236/blr.2015.64028
Abstract: In a comparative view of the Arctic, Greenland is the only autonomous territory that has the possibility of legally reaching the status of full independence. The funding of the increasing autonomy and, ultimately, of the independence of Greenland is acquired largely from the revenues of mining operations and, more generally, from the exploitation of natural energy sources. However, one must consider the special conditions of the indigenous Inuit, torn between the desire to participate in the development of the Arctic regions, with the related socio-economic benefits, and the willingness not to abandon the traditional lifestyles that are the basis of their indigenous culture.
TikTak: A Scalable Simulator of Wireless Sensor Networks Including Hardware/Software Interaction  [PDF]
Francesco Menichelli, Mauro Olivieri
Wireless Sensor Network (WSN) , 2010, DOI: 10.4236/wsn.2010.211098
Abstract: We present a simulation framework for wireless sensor networks developed to allow the design exploration and the complete microprocessor-instruction-level debug of network formation, data congestion, nodes interaction, all in one simulation environment. A specifically innovative feature is the co-emulation of selected nodes at clock-cycle-accurate hardware processing level, allowing code debug and exact execution latency evaluation (considering both protocol stack and application), together with other nodes at abstract protocol level, meeting a designer’s needs of simulation speed, scalability and reliability. The simulator is centered on the Zigbee protocol and can be retargeted for different node micro-architectures.
Optimum Shape of High Speed Impactor for Concrete Targets Using PSOA Heuristic  [PDF]
Francesco Ragnedda, Mauro Serra
Engineering (ENG) , 2010, DOI: 10.4236/eng.2010.24035
Abstract: The present paper deals with the optimum shape design of an absolutely rigid impactor which penetrates into a semi-infinite concrete shield. The objective function to maximize is the depth of penetration (DOP for short) of the impactor; in the case of impactors with axisymmetric shapes DOP is calculated using formulas obtained by Ben-Dor et al. [1-3] with the method of local variations [4] and based on the mechanical model proposed by Forrestal and Tzou [5]. In the present paper we show that using a different class of admissible functions, more general than the axisymmetric one, better results can be obtained. To solve the formulated optimization problem we used a custom version of the particle swarm optimization method (briefly denoted by PSOA), a very recent numerical optimization algorithm of guided random global search. Numerical results show the optimal shape for various types of shields and corresponding DOP; some Ben-Dor et al. [1-3] results are compared to solutions obtained.
The Pursuit of Quality: Assessing Democracies… to Save Democracy?  [PDF]
Mauro Tebaldi, Marco Calaresu
Open Journal of Political Science (OJPS) , 2016, DOI: 10.4236/ojps.2016.61001
Abstract: For over a decade, there has been the widespread awareness that western democracies need to be reformed if they want to successfully cope with the crisis that they are experiencing; also, ultimately, if they want to be able to increase their own level of quality. The aim of this article is to illustrate why and how the quality of a democracy can (and indeed, must) be assessed with the purpose of improving it. Passing through a reflection on the state of the art of a major sector of studies in the international scientific scenario, and by presenting an original typological proposal to classify these same studies, we maintain that the crisis of democracy may be overcome, first of all, by improving the assessment skills of scholars and, secondly, by transforming the knowledge on democratic quality into useful knowledge for citizens.
Gesture as a Cognitive Support to Solve Mathematical Problems  [PDF]
Mauro Francaviglia, Rocco Servidio
Psychology (PSYCH) , 2011, DOI: 10.4236/psych.2011.22015
Abstract: The aim of this study was to investigate the relationships between gestures and mathematical problem solving. It concentrates on the idea that gestures can improve the student’s mathematical conceptual abilities. The educational aim of the current study was to understand whether Penelope sewing the cloth every day will be eventually able to finish it in 50 days, before Ulysses returns in his home-town. To analyse children’s gestures we applied the McNeill classification. The participants were five children aged between 9 and 10 years, attending the fifth-grade class of a primary school in Turin, Italy. We used the observational method to analyse the children’s gestures behaviour. At the end of the analysis, we collected a corpus of 538 gestures. Results show that children use different gesture patterns to communicate their own mathematical ideas. Overall, these findings suggest that gestures facilitate children’ learning of mathematical concepts and improve their cognitive strategies to the problem solution.
Self consistent, absolute calibration technique for photon number resolving detectors
A. Avella,G. Brida,I. P. Degiovanni,M. Genovese,M. Gramegna,L. Lolli,E. Monticone,C. Portesi,M. Rajteri,M. L. Rastello,E. Taralli,P. Traina,M. White
Physics , 2011, DOI: 10.1364/OE.19.023249
Abstract: Well characterized photon number resolving detectors are a requirement for many applications ranging from quantum information and quantum metrology to the foundations of quantum mechanics. This prompts the necessity for reliable calibration techniques at the single photon level. In this paper we propose an innovative absolute calibration technique for photon number resolving detectors, using a pulsed heralded photon source based on parametric down conversion. The technique, being absolute, does not require reference standards and is independent upon the performances of the heralding detector. The method provides the results of quantum efficiency for the heralded detector as a function of detected photon numbers. Furthermore, we prove its validity by performing the calibration of a Transition Edge Sensor based detector, a real photon number resolving detector that has recently demonstrated its effectiveness in various quantum information protocols.
Decision Making Styles and Adaptive Algorithms for Human Action  [PDF]
Mauro Maldonato, Silvia Dell’ Orco
Psychology (PSYCH) , 2011, DOI: 10.4236/psych.2011.28124
Abstract: Without human beings’ ability to choose – and in such a way give order to a universe which, in the beginning, must have presented itself as a chaotic mass of data without clear structures and regularity – evolution would have been unthinkable, even more inconceivable if one considers the fact that the adaptation to that universe must have taken place on the basis of incomplete, fragmentary information and above all starting from limited cognitive capacities and restricted time limits. In order to respond to the challenges of the environment, an individual had to first of all be quick: quick in the reaction to the attack of a predator and in the gaining of an escape route, in deciding how to pursue pray, in obtaining gains from territory that others were using at that same moment, in the selection of a partner and of a place in which to take refuge and so forth. Therefore, if it is true that evolutionary pressure urged the human mind to accumulate information by means of a significant quota of rational decisions, the vast majority of human choices have been favoured by ecological decision making strategies.
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