1,763 research outputs found
Lex naturalis, Leges naturae, "Regeln der Moral". Der Begriff des "Naturgesetzes" und die Entstehung der modernen "Wissenschaften vom Menschen" im naturrechtlichen Zeitalter
No full textRe longobardi e vescovi santi, un duca tiranno, l’imperatore franco. I diplomi di Carlo III per la chiesa vescovile di Bergamo fra narrazione agiografica e comunicazione politica
No full textAnthropologien. Genese und Konfiguration einer "Wissenschaft vom Menschen" in der Frühen Neuzeit
No full textEmidio Campi, Simone De Angelis, Anja-Silvia Goeing, Anthony T. Grafton (éd.), Scholarly Knowledge. Textbooks in Early Modern Europe, (Travaux d’Humanisme et Renaissance, 447), Genève, Droz, 2008
No full textNoblesse-Rocher Annie. Emidio Campi, Simone De Angelis, Anja-Silvia Goeing, Anthony T. Grafton (éd.), Scholarly Knowledge. Textbooks in Early Modern Europe, (Travaux d’Humanisme et Renaissance, 447), Genève, Droz, 2008. In: Revue d'histoire et de philosophie religieuses, 91e année n°4, Octobre-Décembre 2011. pp. 581-582
Scholarly Knowledge: Textbooks in Early Modern Europe, Travaux d'Humanisme et Renaissance
No full textEntre le XVe et le XVIIe siècles prennent leur essor les hautes écoles, le gymnase protestant allemand et le collège jésuite, qui participent tous à la formation des élites de l'Europe moderne. Par ailleurs, les programmes universitaires agrègent les méthodes anciennes et nouvelles, humanistes et scolastiques. Il en résulte une explosion des outils de travail dont la production imprimée, et le manuel scolaire en particulier, témoignent par leur profusion et leur diversité. Scholarly Knowledge réunit, sous la direction d’Emidio Campi, Simone De Angelis, Anja-Silvia Goeing et Anthony T. Grafton, des études modèles pour l’histoire du livre académique à l’époque moderne
Hydropower Generation in Renewable Energy Markets: a Singular Stochastic Control Problem
No full textApplication of spectral linear mixing to rock slabs analyses at various scales using Ma_Miss BreadBoard instrument
No full textFocus of this work is the analysis of rock slabs by means of the Ma_Miss BreadBoard instrument. Ma_Miss (Mars Multispectral Imager for Subsurface Studies, Coradini et al., 2001; De Sanctis et al., 2017) is the miniaturized imaging spectrometer onboard the ESA Exomars 2020 mission. Here we report the results of the analysis carried out on rock slabs using the Ma_Miss breadboard (BB) (De Angelis et al., 2014, 2015) and a Spectro-Goniometer (SPG). The samples are three volcanic rocks (from the Aeolian Islands and Montiferru volcanoes, Italy) and two carbonate rocks (from Central Apennines, Italy). Visible and near infrared spectroscopic characterization has been first performed on all the samples with a Spectro-goniometer (SPG). Successively, higher spatial resolution spectra were acquired with the Ma_Miss BB setup in each of the areas analyzed with the SPG. We compared the spectra of the same areas of the slabs, acquired with SPG and Ma_Miss BB. Three different analysis approaches have been performed on the spectra: arithmetical averaging of the spectra, linear mixing of reflectances and linear mixing of Single Scattering Albedoes (using Hapke model). The comparison shows that: (i) Ma_Miss instrument has great capabilities for the investigation of rock surfaces with high detail; a large number of different mineralogical phases can be recognized thanks to Ma_Miss high resolution within each millimeter-sized analyzed area; (ii) the agreement with SPG spectra is excellent especially when linear mixing is applied for the convolution of Ma_Miss BB spectra
Fattori organizzativi e processi psicosociali nei team di governo delle collaborazioni interorganizzative: Uno studio esplorativo
No full textThis paper investigates the association between structural aspects of interorganizational collaborations and psychosocial processes of trust and identification in Inter-organizational Governing Teams (IGT). A first study used secondary data on 240 interfirm networks. Size of the alliance, presence of a network manager and the previous collaboration vs. recent foundation of the collaboration, were used as grouping variables in a cluster analysis. Results show five types of interfirm alliances. In a second study, members of twenty interorganizational governing teams (67 managers/entrepreneurs), answered a questionnaire on psychosocial variables. Results show that IGTs of larger and recently established interfirm networks present lower levels of interorganizational trust and of trust in team, in comparison to IGTs of networks with lower number of partners or with a previous history of collaboration
A singular stochastic control problem for hydropower generation in renewable energy markets
No full textWe consider a singular stochastic control problem for hydroelectric power production in an energy market where the electricity spot market prices dynamics is described by a Vasicek's process, allowing also for negative prices.
We propose a hydroelectric production system that can react in two different modes when it is convenient to produce energy through an instantaneous release of water. We endow the system with the possibility of producing ``less efficiently'' when negative prices appear in the market, but it is still preferable to produce instantaneously rather than waiting for positive prices.
We defined a novel optimization problem whose performance functional exhibits a state-dependent instantaneous marginal revenue whose sign is directly affected by the sign of the prices dynamics.
We aim to maximize such functional among all the admissible control policies into the class of the adapted stochastic processes whose paths are not necessarily absolutely continuous with respect to the Lebesgue's measure but only non-decreasing, left-continuous and with finite right limits (càglàd).
We prove the Verification Theorem, allowing to characterize the value function of our singular stochastic control problem among the solutions of the associated Hamilton-Jacobi-Bellman equation which turns to be a variational inequality with state-dependent gradient constraint. The Verification Theorem sheds light on the structure of the optimal control which turns to be a purely discontinuous process that, at the first time of action, exerts all the available fuel with a single instantaneous jump.
Under some assumptions on the characteristics of our hydropower production model, we identify the value function of the optimal control problem in terms of the optimal reward function of an associated family of optimal stopping problems. We identified a unique positive boundary, separating the action and inaction regions and we showed that the optimal strategy consists in completely discharge the water reservoir as soon as the price dynamics reaches values grater or equal such optimal threshold.
We highlight the difficulties that arise when the aforementioned assumptions are replaced by other alternative hypotheses. In this more challenging context, we provide some intuitions on the tricky structure of the action and inaction regions as well as on the nature of the candidate optimal control policy
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