5,205 research outputs found
Memoria sui Nostoc e sui Collemi / Elisabetta Fiorini Mazzanti
No full textMemoria della contessa Elisabetta Fiorini Mazzanti del 5 settembre 1852.
Segnatura dell’unità documentale: Archivio storico dell’Accademia dei Georgofili, Letture, memorie, rapporti e discussioni pubbliche, Busta 81, 1378.
Natura: manoscritto.
Consistenza: cc. 6Digitalizzato come parte della Mostra virtuale: Riconoscere il merito, superare i pregiudizi: scienziate ai Georgofili (1753-1911). https://www.georgofili.it/contenuti/riconoscere-il-merito-superare-i-pregiudizi-scienziate-ai-georgofili-1753-1911-mostra-in-rete/1136
Annuncio morte della contessa Elisabetta Fiorini, vedova Mazzanti (23 aprile 1879)
No full textAnnuncio morte di Elisabetta Fiorini Mazzanti del 23 aprile 1879.
Segnatura dell’unità documentale: Archivio storico dell’Accademia dei Georgofili, Carteggio, Busta 37, 5149.
Natura: a stampa.
Consistenza: [1] cartaDigitalizzato come parte della Mostra virtuale: Riconoscere il merito, superare i pregiudizi: scienziate ai Georgofili (1753-1911). https://www.georgofili.it/contenuti/riconoscere-il-merito-superare-i-pregiudizi-scienziate-ai-georgofili-1753-1911-mostra-in-rete/1136
New precise measurements of the ratio of leptonic decays of K+ and K- mesons
No full textThe present PhD thesis concludes an experimental work of three years in the field of particle physics under the supervision of Prof. I. Mannelli.
This work has been developed within the NA48/2 international collaboration
and is part of the research of the collaboration, which, recently, terminated its
second year of data taking at the SPS CERN site. The plan of the paper is the
following:
In the first Chapter an introduction to the relevant topics will be presented;
in the second Chapter the theoretical motivation and the presently published
experimental results will be briefly exposed; Chapter 3 will present the NA48/2
experimental apparatus, while Chapter 4 will focus on the methods employed in
order to achieve the goals of the measurement; starting from Chapter 5 the details
of the analysis will be presented. The final Chapter will conclude the thesis
comparing the results obtained by the candidate with the theoretical predictions
and the experimental results presently available
An assessment of the impact of possible CAP reform scenarios on Romanian agriculture
No full textUsing a simplified model, with key-variable the prices of two different possible scenarios of CAP reform after 2013 (moderate and radical), this paper present a comparison between the price effects of implementation of each reform scenario at 2015 horizon on Romanian agriculture. This short analysis shows that, under the presented hypotheses, the net welfare effect, due to the price changes, for the selected products, is positive in both reform scenarios, yet greater in the case of the radical reform. Integrated in the large context of Romanian development, it seems that the influence of CAP reform upon agriculture and rural areas will be most likely a gradual one: an interpenetration between the two scenarios is foreseeable, starting with the moderate reform that will dominate the period around 2013, the reform measures acquiring a more radical character afterwards.CAP reform, Romania, welfare effects, Agricultural and Food Policy,
Amplifier and radiation detector
No full textSi tratta di una soluzione per ridurre la capacità d'ingresso di un circuito elettronico pre-amplificatore di segnale di un rivelatore di radiazione ionizzante.
Tale riduzione è ottenuta sfruttando parte o tutta la capacità parassita d'ingresso del circuito per realizzare la capacità di retroazione del pre-amplificatore di carica.
La conseguente riduzione della capacità consente di ridurre il rumore elettronico del sistema rivelatore più pre-amplificatore
Rich, Sturmian, and trapezoidal words
No full textIn this paper we explore various interconnections between rich words, Sturmian words, and trapezoidal words. Rich words, first introduced by the second and third authors together with J. Justin and S. Widmer, constitute a new class of finite and infinite words characterized by having the maximal number of palindromic factors. Every finite Sturmian word is rich, but not conversely. Trapezoidal words were first introduced by the first author in studying the behavior of the subword complexity of finite Sturmian words. Unfortunately this property does not characterize finite Sturmian words. In this note we show that the only trapezoidal palindromes are Sturmian. More generally we show that Sturmian palindromes can be characterized either in terms of their subword complexity (the trapezoidal property) or in terms of their palindromic complexity. We also obtain a similar characterization of rich palindromes in terms of a relation between palindromic complexity and subword complexity
Robust Force Control of Series Elastic Actuators
No full textForce-controlled series elastic actuators (SEA) are widely used in novel human-robot interaction (HRI) applications, such as assistive and rehabilitation robotics. These systems are characterized by the presence of the “human in the loop”, so that control response and stability depend on uncertain human dynamics, including reflexes and voluntary forces. This paper proposes a force control approach that guarantees the stability and robustness of the coupled human-robot system, based on sliding-mode control (SMC), considering the human dynamics as a disturbance to reject. We propose a chattering free solution that employs simple task models to obtain high performance, comparable with second order solutions. Theoretical stability is proven within the sliding mode framework, and predictability is reached by avoiding the reaching phase by design. Furthermore, safety is introduced by a proper design of the sliding surface. The practical feasibility of the approach is shown using an SEA prototype coupled with a human impedance in severe stress tests. To show the quality of the approach, we report a comparison with state-of-the-art second order SMC, passivity-based control and adaptive control solutions
Interactive Constrained Dynamics for Rigid and Deformable Objects
No full textFollowing the continuous increase in computational power of consumer hardware, interactive virtual environments have been recently enriched with more and more complex deformable objects. However, many physics engines are still very limited in the way they handle interacting rigid and deformable objects. This paper proposes a constraint-based approach to real-time simulation of coupled rigid and deformable objects capable of providing two-way interactions. Similar techniques have seen widespread usage for either rigid or deformable objects, but not for the simultaneous simulation of both. By extending such approaches, we show not only how interaction is possible but also how it can be performed at real-time rates. We address contact response and also show how to implement typical constraints to enforce limitations in the degrees of freedom and to enhance the dynamical properties of deformable objects. The method is easily integrated into existing physics engines that use similar constraint solvers and is independent on the kind of deformable object paradigm chosen. The provided simulation results show that the method is fast and effective in handling contacts between rigid and deformable objects and in simulating friction and other kinds of constraints
Magneto-optical measurements in thin film of frequency dependence of hysteresis loops from 10 mHz to 10 kHz
No full text- …
