1,101 research outputs found
Large-signal device simulation in time- and frequency-domain: a comparison
No full textThe aim of this paper is to compare the most common time- and frequency-domain numerical techniques for the determination of the steady-state solution in the physics-based simulation of a semiconductor device driven by a time-periodic generator. The shooting and harmonic balance (HB) techniques are applied to the solution of the discretized drift-diffusion device model coupled to the external circuit embedding the semiconductor device, thus providing a fully nonlinear mixed mode simulation. The comparison highlights the strong and weak points of the two approaches, basically showing that the time-domain solution is more robust with respect to the initial condition, while the HB solution provides a more rapid convergence once the initial datum is close enough to the solution itsel
Formalization and solution of an optimal control problem for air quality planning
No full text© IFAC.In order to define efficient air quality plans, Regional Authorities need suitable tools to evaluate both the impact of emission reduction strategies on pollution indexes and the costs of such emission reductions. Due to difficulty to cope with the complexity of environmental models, decision support systems are essential tools to help Environmental Authorities to plan air quality policies that fulfill EU Directive 2008/50 requirements in a cost-efficient way. Thus, the main concern is to search for policies capable of taking into account both the environmental and the economical problems. This work presents a new formalization and the first results of an optimal control problem, addressing the selection of efficient control policies over a certain time horizon to reduce air quality pollution. Dynamic programming offers a powerful tool that allows an iterative formalization of the environmental problem as a constrained optimal control problem. An objective function has to be minimized along a given finite time horizon. A set of dynamic varying constraints on the applicability thresholds of emission reduction technologies (control variables) is considered. When minimizing the objective function, the nondecreasing property of each technology application level and the maximum feasible reduction levels have been constrained. This approach has been tested over the Lombardia region in northern Italy
On The Possible (Re-) Negotiation of BITs by the European Union and its Potential Impact on Latin America
No full textIn the last decade, global markets expanded significantly via trade agreements, regional and bilateral investment treaties. This trend will not stop, even with the global economic turmoil. Thus, the IMF has estimated that, over the next ten years, 90% of the world demand will be generated outside the EU.\ud
On 9 January 2013, Regulation (EU) No 1219/2012 of the European Parliament and of the Council of 12 December 2012 entered into force. The EU adopted this regulation in order to ensure a smooth transition towards a new EU investment policy and to clarify the legal status of EU Member States’ BITs under EU law. The same EU Regulation establishes transitional arrangements for bilateral investment agreements between Member States and third Countries. In particular, the Regulation clarifies how Member States and the EU will apply existing extra-EU BITs and negotiate new extra-EU BITs. All that in view of the negotiation by the European Commission of future bilateral investment treaties that will replace existing bilateral investment treaties concluded by member States with third Countries. The Regulation is a welcome development of the EU’s investment policy as far as it confirms the validity of existing bilateral investment treaties concluded by Member States with Latin American countries until the EU decides to replace them. \ud
In the second part of this chapter, the analysis will be focused on the status of the BITs in force – or at least signed - between EU Member States and Latin American Countries - on the one hand, and of the EU Free Trade Agreements (FTAs) signed or in force between EU and Latin American Countries, on the other hand. As for the former, an overview of the existing treaties will be provided, along with the presentation of the outcomes of the first notification procedure established by the EU regulation no. 1219/2013. Turning to the FTAs, a particular clause inserted in the mixed agreements concluded in 2012 with Peru and Colombia, and with Central American Countries, will deserve much of the attention. The FTA between EU and Central America contains for example an obligation of States parties to review the investment legal framework, the investment environment, and the flow of investment between the parties no later than three years after the entry into force of the agreement. This investment review clause may be defined as a “rendez-vous” clause which implies an obligation to negotiate future agreements or future amendments to the present ones. The treaties, which belong to a “new generation” of FTAs inaugurated by the European Commission in 2006, will be also highlighted with reference to the recent on-going negotiations of EU free trade and investment agreements with third Countries. Even though it is difficult to speculate on the outcome of the ongoing negotiations on investments, in particular on the level of protection granted to investors and on the settlement of State-investor disputes, we will conclude that (at the minimum) the level of protection for investors achieved at the EU level and the respect for principles such as the precautionary principle shall improve
A note on the author citation and typification of Cineraria aurantiaca Hoppe (Tephroseris integrifolia subsp. aurantiaca; Asteraceae)
No full textBartolucci, Fabrizio, Villani, Mariacristina, Galasso, Gabriele (2021): A note on the author citation and typification of Cineraria aurantiaca Hoppe (Tephroseris integrifolia subsp. aurantiaca; Asteraceae). Phytotaxa 512 (4): 297-299, DOI: 10.11646/phytotaxa.512.4.6, URL: http://dx.doi.org/10.11646/phytotaxa.512.4.
The selection of efficient air quality control strategies: A dynamic programming approach
No full textAssessing the economic and environmental sustainability of a regional air quality plan
No full textAir quality plans must be demonstrated to be economically sustainable and environmentally
effective. This paper presents a full cost–benefit and environmental analysis of a large regional air
quality plan involving several different actions covering a large spectrum of fields, from domestic
heating to passenger and freight transport, from electricity generation to agriculture. The impact of
each action is analyzed looking at the possible energy savings, greenhouse gases (GHG) emission
reductions, the improvement in air quality, and the consequent decrease in external costs, namely
the reduced impact on population health. The analysis is performed by applying a flexible and fast
computer tool (RIAT+) that allows for a rapid simulation of different pollutant emission scenario,
to assess different air quality indices (AQIs) over a regional scale domain. The results show that,
in most cases, the economic savings exceed the implementation costs and thus that these actions
can be introduced in air quality plans for the domain under study. The reduced health and climate
costs, though relevant in absolute terms, are, in general, only a fraction of the economic benefits of
energy savings. This is not true for the measures acting on improvements in electricity generation,
since a reduction in power plant emissions (generally with high stacks, far from populated areas)
does not significantly impact the air quality inside the region. A shift in energy production to
renewable sources can instead provide noticeable effects on GHG emissions. This research raises
some interesting and general questions about the adequacy of the methodologies applied to attribute
costs (and benefits) to actions, improving a variety of sectors that are different from the one in which
the measures are applied here
Riscrivere La buona novella di Fabrizio De André in siciliano:
No full textDuring 2021 the indipendent label Musica del Sud released the sicilian adaptation of Fabrizio De André's La buona Novella, which was first published in 1970. The article therefore presents an interview with Francesco Giunta, author of the project and the translation, and makes use of the valuable conversation with Ignazio Macchiarella, in order to explore the depth of the work in its musical, literary and linguistic nuances.
Nel 2021 l'etichetta indipendente Musica del Sud ha pubblicato il riadattamento in siciliano de La buona Novella di Fabrizio De André, uscito per la prima volta nel 1970.
L'articolo presenta dunque l'intervista a Francesco Giunta, l'autore del progetto e della traduzione, e si avvale del prezioso dialogo con Ignazio Macchiarella, condotto allo scopo di indagare la profondità dell'opera nelle sue sfaccettature musicali, letterarie e linguistiche. 
A new study on the Newell-Whitehead-Segel equation with Caputo-Fabrizio fractional derivative
No full textIn this research, we propose a new numerical method that combines with the Caputo-Fabrizio Elzaki transform and the q-homotopy analysis transform method. This work aims to analyze the Caputo-Fabrizio fractional Newell-Whitehead-Segel (NWS) equation utilizing the Caputo-Fabrizio q-Elzaki homotopy analysis transform method. The Newell-Whitehead-Segel equation is a partial differential equation employed for modeling the dynamics of reaction-diffusion systems, specifically in the realm of pattern generation in biological and chemical systems. A convergence analysis of the proposed method was performed. Two-dimensional and three-dimensional graphs of the solutions have been drawn with the Maple software. It is seen that the resulting proposed method is more powerful and effective than the Aboodh transform homotopy perturbation method and conformable Laplace decomposition method in the results. © 2024 the Author(s), licensee AIMS Press
Fabrizio De André e altri cantautori: Italia-Brasile in musica
No full textThe Author wants to compare and find convergence points between Brazilian and Italian music. For Italy a more detailed look will be directed to the production of Fabrizio De André and particularly to the song Princesa, a sad story of marginalization, poverty and violence, in which a part quite considerable is written in portuguese. In De André lyrics there are often rhythms and references to latin-americans musical sounds.La Autora quiere comparar y encontrar puntos de convergencia entre la música brasileña y la italiana. Para Italia un análisis más detallado tendrá como objetivo la producción de Fabrizio De André y en particular la canción Princesa, triste historia de marginación, pobreza, violencia, en la que una parte bastante considerable está escrita en portugués. En los textos de De André a menudo hay rirmos y referências en sonidos musicales latinoamericanos.L’Autrice mette a confronto e cerca di trovare punti di convergenza tra la musica brasiliana e quella italiana. Per l’Italia uno sguardo più dettagliato è rivolto alla produzione di Fabrizio De André e in particolare alla canzone Princesa, triste storia di emarginazione, povertà, violenza, nella quale una parte abbastanza considerevole è scritta in portoghese. Nei suoi testi ci sono spesso ritmi e riferimenti alle sonorità musicali latinoamericane
Ossidi misti con struttura di tpo rutilo, catalizzatori per l’ammonossidazione di n-esano in fase gas a dinitrili C6 insaturi
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