335 research outputs found
TOP QUARK PHYSICS AT THE TEVATRON
No full textThe heaviest known elementary particle, the top quark, was discovered in 1995 by the CDF and D0 collaborations at the Tevatron proton-antiproton collider at Fermilab. Since its discovery, a large program was set in motion by the CDF and D0 collaborations to characterize the production and decay properties of top quarks, and investigate their potential for searches of new phenomena beyond the standard model. During the past 20 years, new methods were developed and implemented to improve the measurements and searches for new physics in the top quark sector. This paper reviews the achievements and results obtained through studies of the top quark at the Tevatron.Helmholtz Associatio
Pierrick Sorin. Comedy in Video Art
No full textThe article reveals the genre-stylistic specificity of artworks of the French video artist Pierrick Sorin, created between the 1980s and the 2020s. It studies the methods and techniques characteristic of P. Sorin’s work, particular attention being paid to his use of comic techniques. The novelty of the research lies in the consideration of P. Sorin’s creative work as an integral artistic system in its development. The relevance of the present study is determined by the need to expand ideas about the principles of shaping and the features of drama in the genres of contemporary art.
The article shows that P. Sorin developed the techniques and methods of video art in an original and spectacular way. Out of the creative methods used by the artist, the author of the article focuses on the following ones: the attraction of expressive means of other arts (cinema, circus, music hall, variety theatre, etc.) and the combination of modern technical and technological solutions with the style of comedy films, buffoonery, and clowning, which is manifested in the plots, expressive means, the specifics of the characters. The classification of P. Sorin’s works proposed by the author includes video art, optical theatres (miniature installations), stage performances and scenographic works.
The author comes to the following conclusions: the plot structure of P. Sorin’s works, depending on the genre, includes miniature scenes-sketches, parody films that repeat scenario designs of the originals, and series of sketches combined in a holistic performance by means of recapitulation. In his scenographic works, P. Sorin creates a comic discourse, a play with the viewer based on technical attractions. The comic techniques characteristic of P. Sorin’s work are: comic absurdity, illogical or impossible combination of elements, the method of inconsistency, the method of unexpected, repetition, and the use of taboo topics
Potere e immaginario politico in Europa. Radici storiche, modelli antropologici, rappresentazioni letterarie [= Transylvanian Review, vol. XXIV, Supplement no. 2, 2015]
No full textIl volume è dedicato ad una ricognizione ad ampio raggio sul tema del Potere all’interno dello spazio culturale europeo, studiato nelle sue differenti dimensioni e forme storiche e attraverso le sue rappresentazioni politiche, simboliche, antropologiche, letterarie. Gli interventi raccolti si dispongono lungo differenti percorsi di ricerca. Due studi si occupano delle straordinarie testimonianze della poesia popolare romena, indagando
l’immaginario della morte ‘speciale’ nella Mioriþa-colind (Giorgia Bernardele) e la rappresentazione del martirio e della santità nel cântec bãtrânesc su Constantin Brâncoveanu (Dan Cepraga). Alla letteratura francese medievale sono dedicati gli interventi di Alvaro Barbieri e Zeno Verlato, che presentano, rispettivamente, un’indagine sulle radici antropologiche della violenza all’interno dell’efferato romanzo cavalleresco del Perlesvaus e un’esegesi degli elementi scritturali rintracciabili in alcune scene di uno dei grandi libri del Medioevo europeo, il Tristan di Béroul. Il Medioevo romeno ed est-europeo è rappresentato da alcuni interventi puntuali, come l’approfondita disamina procurata da Ioan-Aurel Pop su alcuni documenti diffamatori riguardanti Mattia Corvino e l’analisi di Sorin Sipos di alcuni aspetti ideologici della sovranità nelle epistole del voivoda Stefano il Grande. Un excursus sulle fasi più antiche della politica degli Ungheresi al momento del loro insediamento in Europa centrale si trova invece nell’articolo di Florin Sfrengeu. Un gruppo di autori tratta, da diverse angolazioni, delle declinazioni storiche dei rapporti tra Religione e Potere: Ion Gumenâi ci parla dell’immagine imperiale presente all’interno delle comunità russe di Vecchi credenti, Teodor Candu della organizzazione del potere territoriale nelle diocesi ortodosse moldave, mentre Serban Turcus affronta un interessante caso di compromesso con il Potere comunista della Chiesa ortodossa romena. Due interventi, quello di Ioan Ciorba e quello di Bodo Edith, analizzano le dinamiche storiche e simboliche che hanno costruito l’immagine del ‘Buon principe’ nella Transilvania asburgica, mentre Aurel Chiriac ci offre un excursus di storia sociale dell’arte religiosa, indagando i rapporti tra artisti e committenti nel Bihor dei secoli XVIII e XIX. La serrata lettura di Teodor Mateoc di alcuni testi di William Faulkner ci porta all’interno delle politiche razziali del Sud degli Stati Uniti, mentre l’analisi di un documento diplomatico italiano del 1934 sulla festa nazionale romena celebrata a Cluj, permette a Veronica Turcus alcune interessanti considerazioni sulle percezioni simboliche nelle relazioni fra Italia e Romania nel periodo interbellico. Sempre del periodo interbellico si occupa Laura Ardelean, studiando i rapporti di forza (e di amicizia) all’interno del mondo accademico romeno. Menzioniamo, infine, due incursioni negli abusi del Potere durante il Comunismo: Corina e Gabriel Moisa ci parlano dell’uso repressivo della violenza durante le rivolte contadine nel
Bihor del 1949, mentre Roxana Ivasca apre il dossier della violenza politica esercitata dalla Securitate nei confronti della grande scrittrice, premio Nobel, Herta Müller
<i>Entrenchment, wealth, power, and the constitution of democratic societies</i> by Paul Starr
No full textEntrenchment, Wealth, Power, and the Constitution of Democratic Societies, by Paul Starr, New Haven, CT: Yale University Press. 2019. 280 pages, hardcover.Why should we, as Management scholars and educators, care about a book on political diagnosis? The answer is twofold. First, the calibre of the author (Paul Starr), an awardee of both Bancroft and Pulitzer Prizes, a former policy advisor to the Clinton administration, and the author of The Transformation of American Medicine (1982), a book with a profound impact on American policy circles. Second, the core concept (entrenchment) of the book, and its potential to advance the process of institutional development, and the ways in which we can reform and change our institutions to better meet the current and pressing needs of the many, rather than preserve the unequal privileges of a few. In light of the geopolitical, social, and environmental pressures we see currently rising across the world (George, Howard-Grenville, Joshi & Tihanyi, 2016; Howard-Grenville, Buckle, Hoskins & George, 2014) there is no better time to examine whether and how we can address some of these grand challenges by reforming and improving our institutions
A benchmark study of the multiscale and homogenization methods for fully implicit multiphase flow simulations
No full textAccurate simulation of multiphase flow in subsurface formations is challenging, as the formations span large length scales (km) with high-resolution heterogeneous properties. To deal with this challenge, different multiscale methods have been developed. Such methods construct coarse-scale systems, based on a given high-resolution fine-scale system. Furthermore, they are amenable to parallel computing and allow for a-posteriori error control. The multiscale methods differ from each other in the way the transition between the different scales is made. Multiscale (finite element and finite volume) methods compute local basis functions to map the solutions (e.g. pressure) between coarse and fine scales. Instead, homogenization methods solve local periodic problems to determine effective models and parameters (e.g. permeability) at a coarser scale. It is yet unknown how these two methods compare with each other, especially when applied to complex geological formations, with no clear scale separation in the property fields. This paper develops the first comparison benchmark study of these two methods and extends their applicability to fully implicit simulations using the algebraic dynamic multilevel (ADM) method. At each time step, on the given fine-scale mesh and based on an error analysis, the fully implicit system is solved on a dynamic multilevel grid. The entries of this system are obtained by using multiscale local basis functions (ADM-MS), and, respectively, by homogenization over local domains (ADM-HO). Both sets of local basis functions (ADM-MS) and local effective parameters (ADM-HO) are computed at the beginning of the simulation, with no further updates during the multiphase flow simulation. The two methods are extended and implemented in the same open-source DARSim2 simulator (https://gitlab.com/darsim2simulator), to provide fair quality comparisons. The results reveal insightful understanding of the two approaches, and qualitatively benchmark their performance. It is re-emphasized that the test cases considered here include permeability fields with no clear scale separation. The development of this paper sheds new lights on advanced multiscale methods for simulation of coupled processes in porous media.Reservoir EngineeringNumerical Analysi
Calabi–Yau threefolds and moduli of abelian surfaces I
No full textWe describe birational models and decide the rationality/unirationality of moduli spaces d (and levd) of (1, d)-polarized Abelian surfaces (with canonical level structure, respectively) for small values of d. The projective lines identified in the rational/unirational moduli spaces correspond to pencils of Abelian surfaces traced on nodal threefolds living naturally in the corresponding ambient projective spaces, and whose small resolutions are new Calabi–Yau threefolds with Euler characteristic zero
Nostalgia originii la Andreï Makine, Testamentul francez și Sorin Titel, Țara îndepărtată / The nostalgia of the place of birth in Andrei Makine's French Will and in Sorin Titel's The Aloof Country
No full textIn the Middle Ages, exile meant expatriation, the prolonged absence from the native lands, one can say that a person is in exile when it is not possible to return back home. Exile involves unsettlement; the expatriated suffers from nostalgia and tries to recover his origin, the center, his home. Thinking about the past involves an idealized representation of lived history, which may have the effect of a mythical evocation of the past.
The nostalgia is one of the central ideas of the novels of the Russian writer Andreï Makine, who has hardly built his identity as a Russian writer of French, his literary beginnings being not simple. The theme of the nostalgia and the parallel between two different worlds are constantly found in Makine's novels, and in The French Will it gets a special note. Andreï Makine says in interviews that he chose to write in French, but his country of origin is always in his soul. Another writer – Romanian this time – in whose novels we find the nostalgia of origins is Sorin Titel, who reveals an unusual world, Banat, where the writer was born. The estrangement from Banat has beneficial consequences in almost all respects. Established in Bucharest, the author has the nostalgia of Banat and transforms it into an epic projection, reinvents Banat. The removal from the places of origin, the distancing, the alienation, are mandatory conditions of the pilgrimage to himself, for only by being far from Banat he could reinvent him, using the memories of his childhood. Even the title of his first book with which he begins the recuperation is enlightening: The Aloof Country, signifying both the Banat, geographically, and the age of childhood, at a symbolic level. This is the case with the two writers, Andreï Makine and Sorin Titel, writers who being far away from their native places, have fictionally translated what they feel for home - Russia and Banat
Images of childhood: perception and practice in early childhood education
No full textWhen we speak of childhood, we are speaking of adults' constructions of a time in life that no longer exists for the adult. Children do not generally have a voice in these strongly contested viewpoints. Historically, children were viewed as either evil (being the product of parents' intimacy), innocent and in need of care and nurturing, or miniature adults, who existed alongside their elder counterparts. Policy and practice in Early Childhood Education leans strongly toward the image of the child as innocent, and in need of adult protection, as adults grapple with decisions involving the child's best interests.
On closer examination, however, there are multiple views of childhood, which are not mutually exclusive. This paper uses a template of ten constructions of childhood (Sorin & Galloway, 2005) presented at the first international conference on Childhood in Oslo in 2005, to explore current perception and practice in early childhood education. It challenges practitioners to apply the template to their own taken-for-granted notions of children and childhood and to reconsider what is possible in early childhood perceptions and practices. As this template is still relatively new and fluid, it invites discussion and feedback to the author. Comments can be sent to: [email protected]
Numerical homogenization of non-linear parabolic problems on adaptive meshes
No full textWe propose an efficient numerical strategy for solving non-linear parabolic problems defined in a heterogeneous porous medium. This scheme is based on the classical homogenization theory and uses a locally mass-conservative formulation at different scales. In addition, we discuss some properties of the proposed non-linear solvers and use an error indicator to perform a local mesh refinement. The main idea is to compute the effective parameters in such a way that the computational complexity is reduced but preserving the accuracy. We illustrate the behavior of the homogenization scheme and of the non-linear solvers by performing two numerical tests. We consider both a quasi-periodic example and a problem involving strong heterogeneities in a non-periodic medium.The authors gratefully acknowledge financial support from the Research Foundation - Flanders (FWO) through the Odysseus programme (Project G0G1316N). In addition, we wish to thank Professor Mary F. Wheeler and Professor Ivan Yotov who made valuable suggestions or who have otherwise contributed to the ideas behind this manuscript. Part of this work was elaborated during the stay of the first author at the University of Bergen, supported by the Research Foundation - Flanders (FWO), through a travel grant for a short stay abroad. We thank the referees for their valuable comments that helped improving this wor
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