Effects of Anisotropy in QED3 from Dyson-Schwinger equations in a box

We investigate the effect of anisotropies in the fermion velocities of 2+1 dimensional QED on the critical number N_f^c of fermions for dynamical mass generation. Our framework are the Dyson-Schwinger equations for the gauge boson and fermion propagators formulated in a finite volume. In contrast to previous Dyson-Schwinger studies we do not rely on an expansion in small anisotropies but keep the full velocity dependence of fermion equations intact. As result we find sizable variations of N_f^c away from the isotropic point in agreement with other approaches. We discuss the relevance of our findings for models of high-T_c superconductors.Comment: 9 pages, 7 figures, v2: minor changes, typos corrected, version accepted by PR

Le jeu comme « leurre » et le démenti

International audienceIn the cure, according to our hypothesis, the games played by children obey different unconscious logics, which reveals the importance of envisioning the reception of different types of play in the cure. We propose a Freudian-inflected " structural classification of play, " drawing upon similar attempts made by Piaget for developmental psychology, and Caillois for sociology. We will consider that certain play follows a logic of negation (Verneinung) Ŕ play that we call " trompe-l'oeil " games; or a logic of disavowal (Verleugnung) Ŕ " decoy " games; or a logic of foreclusion (Verwerfung) Ŕ " suppléance " games. This article develops the type of play associated with the mechanism of disavowal: the game as decoy. We draw upon and analyse an example from the literature Ŕ that of Arpad, the " little chanticleer " received by S. Ferenczi in 1913. The examination of this case allows us to clarify the reasons for which such games can be an obstacle to the cure, as well as to the establishment and development of the transference. We will be led to cast doubt upon the possibility of considering such play to be " therapeutic " in the sense of winnicottian playing. Following the hypothesis that such play does not favour subjective change, we will propose a comparison with " trompe-l'oeil " and " suppléance " games.Les jeux, dans la cure des enfants, obéissent, selon notre hypothèse, à des logiques inconscientes différentes, ce qui se révèle, selon nous, d'une importance décisive pour envisager leur accueil dans la cure. Aussi proposons-nous une classification structurale des jeux qui épouse le champ freudien, de même que Piaget l'avait tenté pour la psychologie développementale et Caillois pour la sociologie. Nous considérons ainsi que certains jeux obéissent à une logique de dénégation (Verneinung), jeux que nous baptisons jeux « trompe-l'oeil », d'autres à une logique de démenti (Verleugnung), jeux que nous baptisons jeux « leurres » et d'autres à une logique de forclusion (Verwerfung), jeux que nous proposons de nommer jeux « suppléances ». Cet article développe le type de jeux associé au mécanisme du démenti : le jeu comme leurre. Un exemple de la littérature est, à cet effet, convoqué et analysé, celui d'Arpad, le « petit homme-coq » reçu en 1913 par S.Ferenczi. L'approfondissement de ce cas ainsi que l'analyse de la physionomie des jeux « leurres » nous permettent de dégager les raisons pour lesquelles de tels jeux peuvent faire obstacle à la cure ainsi qu'à l'instauration, au développement et à l'analyse du transfert. Sera, de ce fait, mise en doute la possibilité de considérer de tels jeux comme « thérapeutiques » au sens où Winnicott l'affirme du playing. Faisant l'hypothèse que de tels jeux ne sont pas propices à une mutation subjective, nous serons amenés à opposer ceux-ci aux jeux « trompe-l'oeil » et aux jeux « suppléance »

Territorial divisions in Europe

The study of territorial divisions is expected to fall within the remit of political geography, as it implies an analysis of relations between power and territories as political constructs. However, given the multi-faceted nature of the « territorial paradigm », we should also look at other approaches to territoriality (M. Vanier, 2010). The articles compiled in this issue tackle territorial divisions from two angles, drawing comparisons between Western and Eastern European states, including..

Mise en groupe, psychose et porosité des enveloppes psychiques

International audienceNous proposons d’étudier les processus psychiques du thérapeute durant la période de mise en groupe dans le cadre d’un groupe psychanalytique de paroles mené dans un service d’ergo-sociothérapie avec des patients psychotiques adultes. Le but est de montrer que les premiers temps d’un groupe thérapeutique ont pour effet de modifier la texture des enveloppes psychiques du clinicien, qui vont tendre vers une plus grande porosité. Après avoir défini ce que nous entendons par « porosité des enveloppes psychiques », nous présenterons la façon dont nous envisageons la position psychique du thérapeute en situation de groupe, puis nous reviendrons sur les deux premières séances du groupe psychanalytique de paroles. Les résultats de notre recherche nous permettront d’aller plus loin dans la définition du positionnement psychique du thérapeute en situation de groupe, de son cadre interne et de sa position dite « méta »

The Notion of the “Matrix”: New Perspectives in Group Psychotherapy for Psychotic Patients

International audienceFollowing on from the work of Foulkes (1964), we propose in thisarticle to take up the concept of ‘group matrix’. We set out to providenew clinical–theoretical perspectives via the notion of group as‘envelope’ elaborated by Anzieu (1975). This formulation will provideus with a canvas within which to apprehend the organizational andstructural evolution of a therapeutic group for chronic psychoticpatients. We will suggest models of the networks forming the matrixand the texture of the psychic envelope of the group. The aim is tobring out the peculiarities of the matrix in this type of group as wellas its impact on the psychic positioning of the therapist and on his/her therapeutic work within the group

The psychotic transference in groups

International audienceWe wish to present a study of psychotic transference in groups, following on from the work of W.R. Bion and Foulkes. We put forward the hypothesis that in the early stages of such a therapeutic group, group psychotic transference oscillates between expansive movements and restrictive movements. This will be expressed by a tendency of the patients to withdraw, either exclude himself, or engage in an undifferentiated way. To illustrate our premise, we will rely on the analysis of the early stages of a psychoanalytic psychodrama session conducted in a hospital unit. The results will enable us to rethink the therapeutic stakes for this type of treatment

IoT device management framework for smart home scenarios

The paradigm of the Internet of Things (IoT) requires pervasive connectivity to billions of heterogeneous devices. In recent time, rapid growth of IoT devices in smart home environment envisioned a wide range of novel services and applications. However, due to the inherent heterogeneity, home environment is becoming complex making device management extremely difficult. This paper proposes a lightweight IoT device management framework for smart home services. The framework can be deployed at home gateways and consumer smart devices. A prototype implementation and performance evaluation results are also presented

El ojo de la cámara y la retórica de la imágen

The article is based on an analytic clinical of adolescents mobilizing in film sessions. Next, the themes of memory and recollection in their Freudian aspects are classically considered; as well as the links and distances between Freud, cinema and psychoanalysis. The rhetoric (in the sense of Yates and Arasse) is articulated with the figuration to propose a classical connection in the structuralist field (Barthes, Foucault) between speech and cinema. The author proposes a specific articulation between rhetoric, aesthetics and political engagement in the cinema. The resources of the structural analysis of the narratives lead to propose a model of the narrative formulas of the theme of the struggles. Finally a singular opening is proposed by mobilizing the expression of the eye to the camera and linking it to the concept of film analysis of the look at the camera (Vernet) to propose the design of the look by the camera. This one would be an original modality, specific of the adolescent processes, as the adolescent exposes himself to the image which “looks at him” and especially the article indicates that: This look by the camera is tied to the transfer.El artículo se basa en una clínica analítica con adolescentes que traen películas a las sesiones. Luego, se toman los temas de la memoria y del recuerdo en sus aspectos freudianos clásicos; tanto como los lazos y las distancias que existen entre Freud, el cine y el psicoanálisis. La retórica (en el sentido de Yates y de Arasse) está articulada con la figuración para proponer así una aproximación clásica en el campo estructuralista (Barthes, Foucault) entre discurso y cine. El autor propone entonces una articulación específica entre retórica, estética y compromiso político en el cine. Los recursos del análisis estructural de los relatos conducen a proponer un modelo de las fórmulas narrativas del tema de las luchas. Finalmente, se propone una apertura al evocar la expresión de ojo de la cámara y ligándola al concepto de análisis fílmico de la mirada a la cámara (Vernet) para proponer en fin la concepción de mirada a través de la cámara. Esta sería una modalidad original, específica de los procesos adolescentes, dado que el adolescente se expone a la imagen que “lo mira” y, fundamentalmente, el artículo indica que: Esta mirada a través de la cámara está anudada a la transferencia

Riemannian geometry applied to BCI classification

ISBN 978-3-642-15994-7, SoftcoverInternational audienceIn brain-computer interfaces based on motor imagery, covariance matrices are widely used through spatial filters computation and other signal processing methods. Covariance matrices lie in the space of Symmetric Positives-Definite (SPD) matrices and therefore, fall within the Riemannian geometry domain. Using a differential geometry framework, we propose different algorithms in order to classify covariance matrices in their native space