Odour profiling of apple cultivars and correlation with volatile compounds

We are using a trained sensory panel to define the sensory attributes profile of a wide number of apple commercial cultivars and new selections under evaluation at FEM (Fondazione Edmund Mach). The same fruit are evaluated through instrumental determinations as well. Here we present the correlations found between perceived odours (by trained panel) and volatile compounds (by SPME‐GC‐MS) in 18 apple cultivars. It is known that perceived odours are mainly the result of mixture of odorants (more than 300 compounds that can contribute to apple odour and flavour have been identified) and the single components of a mixture may lose their individual identity and a new mixture with a specific odour quality could emerge. Thus the correlations between odours and volatile compounds in apples were investigated by a multivariate approach. Regression models allowed the identification of compounds highly contributing to the odours arising from the complex mixture of volatile compounds released by apples. For example acetate esters strongly contribute to different fruity attributes and the results suggest that perceived odours are due to the relative proportions among esters rather than their presence/absence. In conclusion, sensory and instrumental profiling in combination with appropriate chemometric analyses can help to elucidate the relationships between the perceived odours in real food and the complex mixture of released volatile compounds

Energy Level Quasi-Crossings: Accidental Degeneracies or Signature of Quantum Chaos?

In the field of quantum chaos, the study of energy levels plays an important role. The aim of this review paper is to critically discuss some of the main contributions regarding the connection between classical dynamics, semi-classical quantization and spectral statistics of energy levels. In particular, we analyze in detail degeneracies and quasi-crossings in the eigenvalues of quantum Hamiltonians which are classically non-integrable. Summary: 1. Introduction; 2. Quasi-Crossing and Chaos; 3. Molecular Spectroscopy; 4. Nuclear Models; 4.1 Zirnbauer-Verbaashot-Weidenmuller Model; 4.2 Lipkin-Meshow-Glick Model; 5. Particle Physics and Field Theory; 6. Conclusions.Comment: 26 pages, Latex, 9 figures, to be published in International Journal of Modern Physics

Violence in Mathematics Teaching. Reflections Inspired by Levinas’ Totality and Infinity

In mathematics class, violence is carried out in some usually not recognized situations. In this article, I share some reflections on the topic inspired by some passages of Totality and Infinity, work of the French-Lithuanian philosopher Emmanuel Levinas (1906-1995). I find violence by the teacher in not promoting students’ understanding of mathematics, in a distorted use of rhetoric, and in interrupting an ethical relation. This article analyses situations taken from class activities, focusing on the teacher’s presentation of mathematical content and students’ interventions. I also propose that the improvement of interventions in mathematics education is possible and suggest theoretical ideas for acting on situations of violence

On a kinetic equation describing the behavior of a gas interacting mainly with radiation

In this article we study a kinetic model which describes the interaction between a gas and radiation. Specifically, we consider a scaling limit in which the interaction between the gas and the photons takes place much faster than the collisions between the gas molecules themselves. We prove in the homogeneous case that the solutions of the limit problem solve a kinetic equation for which a well-posedness theory is considered. The proof of the convergence to a new kinetic equation is obtained analyzing the dynamics of the gas-photon system near the slow manifold of steady states.Comment: 43 page

On the diffusion approximation of the stationary radiative transfer equation with absorption and emission

We study the situation in which the distribution of temperature a body is due to its interaction with radiation. We consider the boundary value problem for the stationary radiative transfer equation under the assumption of the local thermodynamic equilibrium. We study the diffusion equilibrium approximation in the absence of scattering. We consider absorption coefficient independent of the frequency $\nu$ (the so-called Grey approximation) and the limit when the photons' mean free path tends to zero, i.e. the absorption coefficient tends to infinity. We show that the densitive of radiative energy $u$, which is proportional to the fourth power of the temperature due to the Stefan-Boltzmann law, solves in the limit an elliptic equation where the boundary value can be determined uniquely in terms of the original boundary condition. We derive formally with the method of matched asymptotic expansions the boundary condition for the limit problem and we prove rigorously the convergence to the solution of the limit problem with a careful analysis of some non-local integral operators. The method developed here allows to prove all the results using only maximum principle arguments.Comment: 62 pages, 9 Figure

La comedia Amadís y Niquea de Francisco de Leiva en el teatro caballeresco del siglo XVII

In 16th century Spanish chivalry theatre, the plays that rewrote episodes from Feliciano de Silva’s novels had considerable importance. Francisco Leiva, a playwright from Malaga, was among the authors that staged those adventures. This article aims to stress the importance of one of his 13 plays: Amadís y Niquea. The last play of the genre of chivalry theatre, it includes a high variety of staging problems and moreover a very unusual role of the first actress. En el teatro caballeresco español del s. XVII las piezas que reescriben episodios extraídos de las obras de Feliciano de Silva destacan por su abundancia. Entre los autores que llevan a las escenas estas aventuras se halla Francisco Leiva, dramaturgo ligado a la ciudad de Málaga. El presente estudio intenta subrayar la originalidad de una de las trece comedias escritas por este autor, el Amadís y Niquea. Última pieza del género caballeresco, la comedia se analiza tanto en relación con los problemas que plantea su puesta en escena como atendiendo al papel sobresaliente de la actriz principal.En el teatro caballeresco español del s. XVII las piezas que reescriben episodios extraídos de las obras de Feliciano de Silva destacan por su abundancia. Entre los autores que llevan a las escenas estas aventuras se halla Francisco Leiva, dramaturgo ligado a la ciudad de Málaga. El presente estudio intenta subrayar la originalidad de una de las trece comedias escritas por este autor, el Amadís y Niquea. Última pieza del género caballeresco, la comedia se analiza tanto en relación con los problemas que plantea su puesta en escena como atendiendo al papel sobresaliente de la actriz principal.   In 16th century Spanish chivalry theatre, the plays that rewrote episodes from Feliciano de Silva’s novels had considerable importance. Francisco Leiva, a playwright from Malaga, was among the authors that staged those adventures. This article aims to stress the importance of one of his 13 plays: Amadís y Niquea. The last play of the genre of chivalry theatre, it includes a high variety of staging problems and moreover a very unusual role of the first actress

El teatro caballeresco del siglo XVII: "Amadís y Niquea", de Francisco de Leiva

El éxito de los libros de caballerías durante el siglo XVI no terminó con la publicación del Quijote sino que siguió durante todo el Siglo de Oro gracias al fenómeno de la reescritura teatral de las más conocidas aventuras caballerescas. Dramaturgos como Lope de Vega, Calderón y Juan Pérez de Montalbán eligieron los episodios caballerescos más espectaculares para llevarlos a las escenas: de esta manera Amadís de Gaula, Florisel y la hermosa Niquea, para nombrar tan solo a algunos de los valientes caballeros y princesas hermosas, protagonizaron unas piezas que conseguían disfrutar de una materia conocida para el entretenimiento del público. El corpus que se ha identificado y que analizo durante la conferencia se compone de unas treinta obras y perdura hasta finales del XVII cuando tenemos uno de los últimos pero quizás más interesantes ejemplos del teatro caballeresco, la pieza "Amadís y Niquea", del dramaturgo malagueño Francisco de Leiva.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

«Aspirare ad essere poeti di Lope»: las misceláneas in mortem como retrato del Madrid literario entre 1630 y 1640

El artículo analiza el fenómeno literario de los repertorios de funera dedicados a literatos españoles entre Italia y España, en particular la Fama póstuma a la vida y muerte del doctor frey Lope Félix de Vega Carpio (1636); las Essequie poetiche ovvero lamento delle muse italiane in morte del signor Lope de Vega publicadas en Venecia en 1636; y las Lágrimas panegíricas a la temprana muerte del gran poeta y teólogo insigne doctor Juan Pérez de Montalbán, clérigo presbítero y Notario de la Santa Inquisición, natural de la imperial villa de Madrid, lloradas y vertidas por los más ilustres ingenio de España (1639). El estudio subraya la participación tanto de famosos literatos como de jóvenes y ambiciosos poetas en estas misceláneas in mortem, además de sus relaciones con los mecenas del tiempo y con los libreros, en concreto con Alonso Pérez, en el contexto del Madrid entre 1630 y 1640

Imperial trophy or island relict? A new extinction paradigm for Père David's deer: a Chinese conservation icon

The file attached is the Published/publisher’s pdf version of the article

Compactness and existence theory for a general class of stationary radiative transfer equations

In this paper, we study the steady-states of a large class of stationary radiative transfer equations in a $C^1$ convex bounded domain. Namely, we consider the case in which both absorption-emission and scattering coefficients depend on the local temperature $T$ and the radiation frequency $\nu.$ The radiative transfer equation determines the temperature of the material at each point. The main difficulty in proving existence of solutions is to obtain compactness of the sequence of integrals along lines that appear in several exponential terms. We prove a new compactness result suitable to deal with such a non-local operator containing integrals on a line segment. On the other hand, to obtain the existence theory of the full equation with both absorption and scattering terms we combine the compactness result with the construction of suitable Green functions for a class of non-local equations