11,864,661 research outputs found
Non-solvability for a class of left-invariant second-order differential operators on the Heisenberg group
No full textWe study the question of local solvability for second-order, left-invariant differential operators on the Heisenberg group , of the form
where is a complex matrix. Such operators never satisfy a cone condition in the sense of Sjöstrand and Hörmander. We may assume that cannot be viewed as a differential operator on a lower-dimensional Heisenberg group. Under the mild condition that and their commutator are linearly independent, we show that is not locally solvable, even in the presence of lower-order terms, provided that . In the case we show that there are some operators of the form described above that are locally solvable. This result extends to the Heisenberg group a phenomenon first observed by Karadzhov and Müller in the case of It is interesting to notice that the analysis of the exceptional operators for the case turns out to be more elementary than in the case When the analysis of these operators seems to become quite complex, from a technical point of view, and it remains open at this time
Heiner Müller: oltre le idee
No full textIl saggio propone un ritratto complessivo dell’opera di Müller, nelle sue varie fasi, ricostruendo criticamente il complesso di immagini e di idee che la alimentano, la sua estetica teatrale e la sua poetica post-brechtiana, il modo singolarissimo in cui esse combinano una dimensione tardomarxista
La produzione: Uno sguardo dietro le quinte - Conversazione tra Heiner Müller, Jan Hoet e Adolf Stock.
No full text“Uno sguardo dietro le quinte della produzione” è una conversazione tra Heiner Müller, Jan Hoet e Adolf Stock, svoltasi in occasione della rassegna d’arte contemporanea Documenta IX, di cui fu curatore Jan Hoet. La conversazione ruota intorno alla riflessione sulla frase: “L'arte è menzogna” e le sue implicazioni per il fare teatro da parte di Müller
Il poeta come "centrifuga di metafore". Heiner Müller sul declino dell'Impero.
No full text"Il poeta come ‘centrifuga di metafore’” fa parte della famosa serie di interviste di Alexander Kluge a Heiner Müller. Si tratta di una vera e propria messa in scena di un dialogo in cui Müller riflette su ciò che viene dimenticato dalla storia e sulle possibilità di rappresentarlo a teatro.
La messa in scena è visibile anche nella forma stessa dell’intervista, che è tutta intessuta di didascalie che descrivono la scena in cui si svolge il dialogo
“Sopravvivere prima di tutto.” Lo scrittore Heiner Müller riflette sull’opportunismo e sullo spirito di lotta dopo la fine della DDR.
No full text“Sopravvivere prima di tutto” è un’intervista con la critica e pubblicista Sigrid Löffler per la rivista austriaca Profil in occasione dell’uscita dell’autobiografia di Müller "Krieg ohne Schlacht". Müller inizialmente parla del suo incarico presso il Berliner Ensemble e ricorda il suo - difficile - rapporto con Bert Brecht. Seguono alcune riflessioni sulla sua situazione come autore della Repubblica Democratica Tedesca (DDR)
Müller Deutschland 1979-1989. L'istituzione Heiner Müller nella Repubblica Federale Tedesca attraverso l'esempio di Berlino Ovest
No full textObject of this essay is role of the GDR author and dramatist Heiner Müller in West Berlin between 1979 and 1989, contextualizing him in the specific and peculiar artistic and intellectual scenario of the so called "two hearted city"
Vitreous from idiopathic epiretinal membrane patients induces glial-to-mesenchymal transition in Müller cells
No full textIdiopathic epiretinal membranes (ERMs) are fibrocellular membranes containing extracellular matrix proteins and epiretinal cells of retinal and extraretinal origin. iERMs lead to decreased visual acuity and their pathogenesis has not been completely defined. Macroglial Müller cells appear to play a pivotal role in the pathogenesis of iERM where they may undergo glial-to-mesenchymal transition (GMT), a transdifferentiation process characterized by the downregulation of Müller cell markers, paralleled by the upregulation of pro-fibrotic myofibroblast markers. Previous observations from our laboratory allowed the molecular identification of two major clusters of iERM patients (named iERM-A and iERM-B), iERM-A patients being characterized by less severe clinical features and a more “quiescent” iERM gene expression profile when compared to iERM-B patients. In the present work, Müller MIO-M1 cells were exposed to vitreous samples obtained before membrane peeling from the same cohort of iERM-A and iERM-B patients. The results demonstrate that iERM vitreous induces proliferation, migration, and GMT in MIO-M1 cells, a phenotype consistent with Müller cell behavior during iERM progression. However, even though the vitreous samples obtained from iERM-A patients were able to induce a complete GMT in MIO-M1 cells, iERM-B samples caused only a partial GMT, characterized by the downregulation of Müller cell markers in the absence of upregulation of pro-fibrotic myofibroblast markers. Together, the results indicate that a relationship may exist among the ability of iERM vitreous to modulate GMT in Müller cells, the molecular profile of the corresponding iERMs, and the clinical features of iERM patients
Einleitung
No full textWas spielen Theater eigentlich, wenn sie übersetzte Texte auf die Bühne bringen? Jede Inszenierung auf einer Bühne ist bereits ein Adaptions- und Übersetzungsprozess. Was also passiert, wenn der zugrunde liegende Text seinerseits eine Übersetzung ist? Was macht die Spielbarkeit eines übersetzten Bühnentexts aus? Nach welchen Kriterien werden Übersetzungen ausgewählt? Welche Instanzen spielen eine Rolle beim Transfer eines Bühnentexts von einem Sprach- und Kulturraum in einen anderen? Was passiert, wenn Dramenklassiker in einem fremden Kontext adaptiert werden?
Der vorliegende Band geht diesen Fragen am Beispiel der deutsch-italienischen Theaterbeziehungen vom 18. Jahrhundert bis zur Gegenwart nach und nimmt dafür die Übersetzungs- und Aufführungsgeschichte von Goldoni, Pirandello oder Pasolini in Deutschland und von Goethe, Kleist oder Brecht in Italien unter Berücksichtigung von Theaterakteuren und Vermittlerfiguren wie Giorgio Strehler, Luca Ronconi, Heinz Riedt oder Edoardo Sanguineti und der Rolle von Theaterverlagen und -zeitschriften umfassend in den Blick
A Mosaic of Words and Images. Translation and Commentary of Herta Müller's "Der Beamte sagte".
No full textreservedDie vorliegende Arbeit bietet einen Übersetzungsvorschlag vom Deutschen ins Italienische des Buchs Der Beamte sagte der rumäniendeutschen Schriftstellerin Herta Müller. Hauptziel dieser Arbeit ist es, bestimmte Übersetzungsschwierigkeiten hervorzuheben und über die entsprechenden Lösungen zu überlegen. Insbesondere werden die Übersetzungsentscheidungen von für den Text prägenden Stilelementen, beispielweise Metaphern, gründlich untersucht. Die Übersetzung des Textes und ihren Kommentar zeigen also die Komplexität von Müllers hochpoetischer Sprache und die Herausforderungen, die sie an den Übersetzer stellt.The following is a translation draft from German into Italian of the book Der Beamte sagte by the Romanian-German author Herta Müller. The main aim of this work is to highlight some problems of translation and focus on any possible solutions. Particularly, translation choices of certain stylistic elements characterizing the book of Müller, such as metaphors, are shown. The translation of the text and its commentary thus reveal the complexity of Müller’s highly poetic language and the challenges for the translator
Müller glial cell reactivation in Xenopus models of retinal degeneration
No full textA striking aspect of tissue regeneration is its uneven distribution among different animal classes, both in terms of modalities and efficiency. The retina does not escape the rule, exhibiting extraordinary self-repair properties in anamniote species but extremely limited ones in mammals. Among cellular sources prone to contribute to retinal regeneration are Müller glial cells, which in teleosts have been known for a decade to re-acquire a stem/progenitor state and regenerate retinal neurons following injury. As their regenerative potential was hitherto unexplored in amphibians, we tackled this issue using two Xenopus retinal injury paradigms we implemented: a mechanical needle poke injury and a transgenic model allowing for conditional photoreceptor cell ablation. These models revealed that Müller cells are indeed able to proliferate and replace lost cells following damage/degeneration in the retina. Interestingly, the extent of cell cycle re-entry appears dependent on the age of the animal, with a refractory period in early tadpole stages. Our findings pave the way for future studies aimed at identifying the molecular cues that either sustain or constrain the recruitment of Müller glia, an issue of utmost importance to set up therapeutic strategies for eye regenerative medicine
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