Expanding graphs, Ramanujan graphs, and 1-factor perturbations

We construct (k+-1)-regular graphs which provide sequences of expanders by adding or substracting appropriate 1-factors from given sequences of k-regular graphs. We compute numerical examples in a few cases for which the given sequences are from the work of Lubotzky, Phillips, and Sarnak (with k-1 the order of a finite field). If k+1 = 7, our construction results in a sequence of 7-regular expanders with all spectral gaps at least about 1.52

Multigap RPC time resolution to 511 keV annihilation photons

The time resolution of Multigap Resistive Plate Counters (MRPCs) to $511$ keV gamma rays has been investigated using a $^{22}$Na source and four detectors. The MRPCs time resolution has been derived from the Time-of-Flight information, measured from pairs of space correlated triggered events. A GEANT4 simulation has been performed to analyze possible setup contributions and to support experimental results. A time resolution (FWHM) of $376$ ps and $312$ ps has been measured for a single MRPC with four $250$ $\mu$m gas gaps by considering respectively one and two independent pairs of detectors.Comment: 25 pages, 14 figure

Competitive ratio of List Scheduling on uniform machines andrandomized heuristics

We study online scheduling on m uniform machines, where m−1 of them have a reference speed 1 and the last one a speed s with 0≤s≤1. The competitive ratio of the well-known List Scheduling (LS) algorithm is determined. For some values of s and m=3, LS is proven to be the best deterministic algorithm. We describe a randomized heuristic for m machines. Finally, for the case m=3, we develop and analyze the competitive ratio of a randomized algorithm which outperforms LS for any

Recognition of generalized network matrices

In this PhD thesis, we deal with binet matrices, an extension of network matrices. The main result of this thesis is the following. A rational matrix A of size n times m can be tested for being binet in time O(n^6 m). If A is binet, our algorithm outputs a nonsingular matrix B and a matrix N such that [B N] is the node-edge incidence matrix of a bidirected graph (of full row rank) and A=B^{-1} N. Furthermore, we provide some results about Camion bases. For a matrix M of size n times m', we present a new characterization of Camion bases of M, whenever M is the node-edge incidence matrix of a connected digraph (with one row removed). Then, a general characterization of Camion bases as well as a recognition procedure which runs in O(n^2m') are given. An algorithm which finds a Camion basis is also presented. For totally unimodular matrices, it is proven to run in time O((nm)^2) where m=m'-n. The last result concerns specific network matrices. We give a characterization of nonnegative {r,s}-noncorelated network matrices, where r and s are two given row indexes. It also results a polynomial recognition algorithm for these matrices.Comment: 183 page

Creating the cultures of the future: cultural strategy, policy and institutions in Gramsci. Part three: Is there a theory of cultural policy in Gramsci’s prison notebooks?

In this article, I argue that Gramsci’s prison notes on questions of cultural strategy, policy and institutions, which have so far been largely overlooked by scholars, provide further analytical insights to those offered by his more general concepts. Together they enrich the theoretical underpinnings for critical frameworks of analysis as well as for radical practices of cultural strategy, cultural policy-making and cultural organisation. On the basis of a detailed analysis of these notes, I then answer the question of whether they amount to a theory of cultural policy

Genèses littéraires dans la correspondance de Pietro et Alessandro Verri

La correspondance des frères Verri permet de suivre pendant trente ans (1766-1797) l’élaboration des principales œuvres économiques et philosophiques de Pietro et le mûrissement des goûts littéraires d’Alessandro au gré de multiples expérimentations de styles et de genres. Le premier vit à Milan, le second réside à Rome : tous deux développent, à travers leur correspondance hebdomadaire, une pratique collaborative de l’écriture. Brouillons et manuscrits transitent par voie postale pour être discutés et annotés, le texte prenant forme au fil de ces échanges. Mais l’écriture épistolaire des frères Verri n’a pas, en matière de genèse littéraire, qu’une fonction productrice : les jugements exprimés ne témoignent pas toujours d’une capacité de l’interlocuteur à saisir et déchiffrer l’œuvre et ses enjeux. Avec le temps, s’usent l’amitié fraternelle et ses promesses initiales (stimuler l’autre, être son censeur impartial), à mesure que deux styles s’affirment et que se creuse le clivage idéologique dans les années de la Révolution.The correspondence of the Verri brothers makes it possible to follow the evolution, throughout thirty years (1766-1797), of the development of the most important economic and political works of Pietro, together with the development of Alessandro’s literary taste through many experimentations with styles and genres. The first lived in Milan; the second in Rome: by their weekly correspondence, they developed a collaborative writing. Drafts and manuscripts are sent by post and are discussed and annotated, the text being shaped throughout these exchanges. But the correspondence of the Verri brothers does not only have, with regards to literary genetics, a productive function: the expressed opinions do not always reveal the counterpart’s ability to understand the work and its issues. Over time, brotherly friendship vanishes and so does the initial commitment (to encourage the other, to be an unbiased censor), as two different styles are developed, and the ideological gap becomes wider in the years of Revolution.Die Korrespondenz der Brüder Verri ermöglicht es, dreißig Jahre lang (1766-1797) die Ausarbeitung der wichtigsten ökonomischen und philosophischen Werke Pietros zu verfolgen, ebenso kann man die Reifung des literarischen Geschmacks von Alessandro, der mit verschiedenen Stilen und Genres experimentierte, beobachten. Der eine Bruder lebt in Mailand, der andere residiert in Rom: Durch ihre wöchentliche Korrespondenz entwickeln sie eine kollaborative Schreibpraxis. Entwürfe und Manuskripte werden zur Erörterung und Kommentierung per Post versandt, wobei der Text im Laufe dieses Austauschs Gestalt annimmt. Das Briefeschreiben der Brüder Verri hat jedoch nicht nur eine produktive Funktion mit Blick auf die literarischen Textgenese: Die getroffenen Urteile zeugen nicht immer von der Fähigkeit des Gesprächspartners, das Werk zu erfassen und seine Themen zu entschlüsseln. Mit der Zeit verbraucht sich die brüderliche Freundschaft mit ihren anfänglichen Versprechungen (den Anderen zu motivieren, ein unparteiischer Zensor zu sein), da sich zwei Stile entwickeln und sich die ideologische Spaltung in den Jahren der Revolution erweitert.La correspondencia de los hermanos Verri permite seguir durante treinta años (1766-1797) la elaboración de las principales obras económicas y filosóficas de Pietro y la maduración de los gustos literarios de Alessandro a través de sus múltiples experimentaciones de estilos y géneros. El primero vive en Milán, el segundo reside en Roma; los dos desarrollan, mediante su correspondencia semanal, una práctica colaborativa de la escritura. Borradores y manuscritos transitan por vía postal para ser discutidos y anotados, y el texto toma forma a lo largo de estos intercambios. Sin embargo, la escritura epistolar de los hermanos Verri no cumple, en materia de génesis literaria, solo una función productora: los juicios expresados no siempre dan cuenta de la capacidad del interlocutor para comprender y descifrar la obra y sus desafíos. Con el tiempo, la amistad fraterna y sus promesas iniciales (estimular al otro, ser su censor imparcial) se deterioran a medida que los dos estilos se afirman y que se profundiza la brecha ideológica en los años de la Revolución.A correspondência dos irmãos Verri nos permite acompanhar, durante 30 anos (1766-1797), a elaboração das principais obras econômicas e filosóficas de Pietro e o amadurecimento dos gostos literários de Alessandro a partir de diversas experimentações de estilos e de gêneros. O Pietro vive em Milão, Alessandro, em Roma : ambos desenvolvem através das suas correspondências semanais, uma prática de escrita colaborativa. Rascunhos e manuscritos transitam por via postal para serem discutidos e anotados, enquanto o texto vai ganhando forma ao longo dessas trocas. Mas a escrita epistolar dos irmãos Verri não tem, em matéria de gênese literária, apenas uma função produtora : os julgamentos expressos nem sempre testemunham, da parte do interlocutor , uma capacidade de compreender e de decifrar a obra e seus desafios. Com o tempo, a amizade fraterna se deteriora e suas promessas iniciais (estimular o outro, ser o seu censor imparcial) se perdem, na medida em que dois estilos distintos se afirmam e que se aprofunda a clivagem ideológica nos anos da Revolução.La corrispondenza tra i fratelli Verri permette di seguire, nell’arco di trent’anni (1766-1797), l’elaborazione delle principali opere economiche e filosofiche di Pietro e la maturazione dei gusti letterari di Alessandro attraverso varie sperimentazioni di stili e di generi. Il primo vive a Milano, il secondo a Roma: entrambi sviluppano, tramite la corrispondenza settimanale, una pratica collaborativa della scrittura. Abbozzi e manoscritti circolano a mezzo posta per essere discussi e annotati, e il testo prende progressivamente forma attraverso questi scambi. Ma, dal punto di vista della genesi letteraria, la scrittura epistolare dei fratelli Verri non ha soltanto una funzione produttiva: i giudizi espressi non sempre testimoniano della capacità, da parte dell’interlocutore, di comprendere l’opera e di coglierne la posta in gioco. Con il passare del tempo l’amicizia fraterna si affievolisce e le sue iniziali promesse (stimolare l’altro, essere il suo censore imparziale) vengono meno, via via che due stili distinti si affermano e che si approfondisce il divario ideologico negli anni della Rivoluzione

Enzymatic colorimetric method for the determination of inorganic phosphorus in serum and urine.

The performance of an enzymatic colorimetric method for the determination of inorganic phosphorus in serum and urine is described. Phosphate ions react with inosine in the presence of purine nucleoside phosphorylase to form hypoxanthine; this is oxidized by xanthine oxidase to uric acid with production of hydrogen peroxide. The latter is determined with the aid of the chromogen system peroxidase/4-aminophenazone/N-ethyl-N-(3-methylphenyl)-N'-acetyl- ethylenediamine, the coloured product being measured at 555 nm. This series of reactions is completed in 5 min at 37\ub0C. The test is linear up to 240 mg/l. Analytical recovery in serum averaged 101.2 \ub1 1.2% and in urine 101.9 \ub1 3.2%. Within-run and between-run precision studies in serum and urine samples gave CVs 64 4.54% (at 22.0 mg/l). Results obtained by this method agree (r = 65 0.983) with the molybdate UV and molybdenum blue methods. Interference by endogenous substances, including organic phosphate, was negligible

La tradition italienne des manuscrits d’auteur : un patrimoine préservé et une culture littéraire

Une situation d’exception Rien ne justifierait en apparence la parution d’un numéro de Genesis consacré de façon exclusive à une tradition littéraire « nationale », dans la mesure où l’on peut difficilement imaginer qu’un écrivain italien, confronté à une page blanche, soit soumis à des phénomènes cognitifs radicalement différents par rapport à ses collègues français, espagnols, anglais ou allemands. Force est pourtant de constater qu’au-delà même de la spécificité linguistique des dossiers d..

Le regard d’un éditeur, Gianni Francioni

Gianni Francioni est professeur d’Histoire de la philosophie à l’Université de Pavie, actuellement détaché auprès de l’Académie nationale des Lincei, à Rome. Ses travaux portent sur la pensée philosophique et politique du xviiie au xxe siècle. Membre des comités scientifiques de l’Édition nationale des œuvres d’Antonio Gramsci (commencée en 2007) et de Pietro Verri (8 volumes parus entre 2003 et 2014), il a dirigé avec Luigi Firpo l’Édition nationale des œuvres de Cesare Beccaria (16 volumes,..

Prigioniero innocente. Metaprogetto di una struttura ICAM a misura di bambino

LAUREA MAGISTRAL