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Search Results: 1 - 10 of 327 matches for " Daria Lazarescu "
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Pulmonary Fibrosis Due to Nitrofurantoin Therapy: A Case Report  [PDF]
Leonidas Grigorakos, Garyphallia Poulakou, Daria Lazarescu, Pavlos Myrianthefs, Nikolaos Markou, Maria Bikou, Adamantia Petineli, Konstantinos Kokkinis
Open Journal of Respiratory Diseases (OJRD) , 2017, DOI: 10.4236/ojrd.2017.73012
Abstract: We report the case of a patient with pulmonary fibrosis, developed as an adverse reaction to nitrofurantoin therapy received for totally 6 months for the prevention of recurrent urinary tract infections. Chest X-ray and CT scan revealed extensive elements of interstitial pulmonary fibrosis. After diagnosis, administration of nitrofurantoin was immediately stopped; and specific prolonged therapy with low-dose corticosteroids per os and inhaled steroids were administered. The patient responded successfully both clinically and biochemically and possible digestive system side effects were prevented through the administration of gastroprotection medication. For the prevention of urinary tract infection, the patient received well tolerated therapy with fosfomycin which was further continued as a prophylactic agent.
Matrix Ansatz for the Fluctuations of the Current in the ASEP with Open Boundaries
Alexandre Lazarescu
Physics , 2012, DOI: 10.1088/1751-8113/46/14/145003
Abstract: The Asymmetric Simple Exclusion Process is one of the most extensively studied models in non-equilibrium statistical mechanics. The macroscopic particle current produced in its steady state is directly related to the breaking of detailed balance, and is therefore a physical quantity of particular interest. In this paper, we build a matrix product Ansatz which allows to access the exact statistics of the fluctuations of that current for finite sizes, as well as the probabilities of configurations conditioned on the mean current. We also show how this Ansatz can be used for the periodic ASEP, and how it translates in the language of the XXZ spin chain.
Exact Large Deviations of the Current in the Asymmetric Simple Exclusion Process with Open Boundaries
Alexandre Lazarescu
Physics , 2013,
Abstract: In this thesis, we consider one of the most popular models of non-equilibrium statistical physics: the Asymmetric Simple Exclusion Process, in which particles jump stochastically on a one-dimensional lattice, between two reservoirs at fixed densities, with the constraint that each site can hold at most one particle at a given time. This model has the mathematical property of being integrable, which makes it a good candidate for exact calculations. What interests us in particular is the current of particles that flows through the system (which is a sign of it being out of equilibrium), and how it fluctuates with time. We present a method, based on the "matrix Ansatz" devised by Derrida, Evans, Hakim and Pasquier, that allows to access the exact cumulants of that current, for any finite size of the system and any value of its parameters. We also analyse the large size asymptotics of our result, and make a conjecture for the phase diagram of the system in the so-called "s-ensemble". Finally, we show how our method relates to the algebraic Bethe Ansatz, which was thought not to be applicable to this situation.
The Physicist's Companion to Current Fluctuations: One-Dimensional Bulk-Driven Lattice Gases
Alexandre Lazarescu
Physics , 2015, DOI: 10.1088/1751-8113/48/50/503001
Abstract: One of the main features of statistical systems out of equilibrium is the currents they exhibit in their stationary state: microscopic currents of probability between configurations, which translate into macroscopic currents of mass, charge, etc. Understanding the general behaviour of these currents is an important step towards building a universal framework for non-equilibrium steady states akin to the Gibbs-Boltzmann distribution for equilibrium systems. In this review, we consider one-dimensional bulk-driven particle gases, and in particular the asymmetric simple exclusion process (ASEP) with open boundaries, which is one of the most popular models of one-dimensional transport. We focus, in particular, on the current of particles flowing through the system in its steady state, and on its fluctuations. We show how one can obtain the complete statistics of that current, through its large deviation function, by combining results from various methods: exact calculation of the cumulants of the current, using the integrability of the model ; direct diagonalisation of a biased process in the limits of very high or low current ; hydrodynamic description of the model in the continuous limit using the macroscopic fluctuation theory (MFT). We give a pedagogical account of these techniques, starting with a quick introduction to the necessary mathematical tools, as well as a short overview of the existing works relating to the ASEP. We conclude by drawing the complete dynamical phase diagram of the current. We also remark on a few possible generalisations of these results.
METHODS TO INCREASE THE COMPETITIVENESS IN INDUSTRY
Ion STANCU,Adriana LAZARESCU
Management & Marketing , 2006,
Abstract: Industrial firms are different between them for their economicalcharacteristics, competitive situations and their prospects. Industry andcompetitive analysis use a lot of concepts and methods for obtaining a clearimage concerning the variable conditions from industry and competitivestrong forces. Economical characteristics of industry are important for theirstrategic implications.
Bethe Ansatz and Q-operator for the open ASEP
Alexandre Lazarescu,Vincent Pasquier
Physics , 2014, DOI: 10.1088/1751-8113/47/29/295202
Abstract: In this paper, we look at the asymmetric simple exclusion process with open boundaries with a current-counting deformation. We construct a two-parameter family of transfer matrices which commute with the deformed Markov matrix of the system. We show that these transfer matrices can be factorised into two commuting matrices with one parameter each, which can be identified with Baxter's Q-operator, and that for certain values of the product of those parameters, they decompose into a sum of two commuting matrices, one of which is the Bethe transfer matrix for a given dimension of the auxiliary space. Using this, we find the T-Q equation for the open ASEP, and, through functional Bethe Ansatz techniques, we obtain an exact expression for the dominant eigenvalue of the deformed Markov matrix.
An Exact Formula for the Statistics of the Current in the TASEP with Open Boundaries
Alexandre Lazarescu,Kirone Mallick
Physics , 2011, DOI: 10.1088/1751-8113/44/31/315001
Abstract: We study the totally asymmetric exclusion process (TASEP) on a finite one-dimensional lattice with open boundaries, i.e., in contact with two reservoirs at different potentials. The total (time-integrated) current through the system is a random variable that scales linearly with time in the long time limit. We give a parametric representation for the generating function of the cumulants of the current, which is related to the large deviation function by Laplace transform. This formula is valid for all system sizes and for all values of the boundary coupling parameters.
Simulation of Thermal Explosion of Catalytic Granule in Fluctuating Temperature Field  [PDF]
Igor Derevich, Daria Galdina
Journal of Applied Mathematics and Physics (JAMP) , 2013, DOI: 10.4236/jamp.2013.15001
Abstract:

Method for numerical simulation of the temperature of granule with internal heat release in a medium with random temperature fluctuations is proposed. The method utilized the solution of a system of ordinary stochastic differential equations describing temperature fluctuations of the surrounding and granule. Autocorrelation function of temperature fluctuations has a finite decay time. The suggested method is verified by the comparison with exact analytical results. Random temperature behavior of granule with internal heat release qualitatively differs from the results obtained in the deterministic approach. Mean first passage time of granules temperature intersecting critical temperature is estimated at different regime parameters.

Service Quality Experience and Customers’ Behavioural Intentions in Active Sport Tourism  [PDF]
Anna Romiti, Daria Sarti
Modern Economy (ME) , 2016, DOI: 10.4236/me.2016.712127
Abstract: This paper analyzes the role played by experience in the loyalty and intent to return of sports tourists to a running race. The data for this study were collected through an online questionnaire filled in by 984 participants of one of the most important international running races in Italy. A regression analysis was conducted to evaluate the data. The results showed that aesthetic dimensions (the valence and the venue) were the principal determinant of loyalty for active sports tourists. The principal determinants of the intent to return were the venue and the technical quality (the value and the challenge). This study provides suggestions for future research and gives useful insights into managerial implications for sports tourism management.
Unaccustomed Earth: The West and India in Jhumpa Lahiri’s Narrative Unaccustomed Earth: l’Occidente e l’India nella narrativa di Jhumpa Lahiri
Daria Parisi
Between , 2011,
Abstract: This article focuses on the representations of the West and of India in Jhumpa Lahiri’s fiction through the analysis of one of her more significant short stories, “Mrs. Sen’s”, appearing in her collection, Interpreter of Maladies (1999; Pulitzer Prize, 2000). In this short story, Lahiri uses most of the recurrent discursive strategies, themes, and motifs of her fiction, such as the use of the point of view of children, the female identity and loneliness, strangeness as a means to represent the human condition, and colours and food as cultural difference. “Mrs. Sen’s” is the story of the meeting of two kinds of loneliness and two cultures, that of an American boy, Eliot and that of his Bengali babysitter, Mrs Sen. The analysis of the short story is inducive, in that it focuses on the images of the text as they gradually come to the reader’s imagination. It emerges that the representations of India and the West, i.e. United States in this short story, are antithetically built through the opposition of colour/non-colour, noise/silence, full/empty, hot/cold, covered/naked, and smell/odourlessness. Through Eliot’s unmasking point of view, these antitheses will prove the “accustomed earth”, the United States, to be as strange to him as to Mrs Sen; while Mrs Sen’s India will appear a warmer and more comfortable place, although far beyond their reach. Nell’articolo le rappresentazioni dell’India e dell’Occidente sono illustrate attraverso l’analisi di uno dei racconti più significativi della produzione narrativa di Jhumpa Lahiri, Da Mrs Sen, contenuto nella prima raccolta di racconti dell’autrice, L’interprete dei malanni (1999; vincitrice del Premio Pulitzer nel 2000). In questo racconto sono utilizzati procedimenti, motivi e temi tipici della narrativa della Lahiri, quali il punto di vista dei bambini, la solitudine e l’identità femminile, l’estraneità quale essenza della condizione umana, il cibo e i colori come segni della diversità culturale. Da Mrs Sen rappresenta l’incontro di due culture e due solitudini, quelle di Eliot, un ragazzino americqno, e quelle della sua baby sitter bengalese, Mrs Sen. L’analisi del racconto procede per via induttiva, focalizzando sulle immagini del testo così come esse si presentano all’immaginazione del lettore. Ne risulta che le rappresentazioni dell’India e dell’Occidente sono costruite anteticamente attraverso le opposizioni colore/non colore, pieno/vuoto, caldo/freddo, coperto/nudo, odoroso/inodore: attraverso il punto di vista smascheratorio di Eliot queste antitesi sveleranno che quello che costituiva la sua “accustome
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