Search results for "REPRESENTATION"
showing 10 items of 1710 documents
Poisson Geometry in Mathematics and Physics
2008
We realize quantized anti de Sitter space black holes, building Connes spectral triples, similar to those used for quantized spheres but based on Universal Deformation Quantization Formulas (UDF) obtained from an oscillatory integral kernel on an appropriate symplectic symmetric space. More precisely we first obtain a UDF for Lie subgroups acting on a symplectic symmetric space M in a locally simply transitive manner. Then, observing that a curvature contraction canonically relates anti de Sitter geometry to the geometry of symplectic symmetric spaces, we use that UDF to define what we call Dirac-isospectral noncommutative deformations of the spectral triples of locally anti de Sitter black…
Topological Hopf Algebras, Quantum Groups and Deformation Quantization
2019
After a presentation of the context and a brief reminder of deformation quantization, we indicate how the introduction of natural topological vector space topologi es on Hopf algebras associated with Poisson Lie groups, Lie bialgebras and their doubles explains their dualities a nd provides a comprehensive framework. Relations with deformation quantization and applications to the deformation quantization of symmetric spaces are described.
Femininity and the Salon
2020
This chapter concerns Salon Culture and its role as a distributor of philosophy at the beginning of the nineteenth century, marking the importance of the mostly unacknowledged contribution by female thinkers. The salon presents the space between private and profession in which the participants could try out new roles and change old ones. Thus, the establishment of sentimental circles such as the Tugendbund around Henriette Herz, the extensive net of communication and representation established by Rahel Varnhagen, the opportunity to publish under either pseudonyms or hidden behind a male editorship used by writers such as Dorothea Schlegel may all count as first attempts to form a role as sa…
Social representations of latin american immigrants about immigration, care and elderly caregivers
2013
Ageing in Spain has increased considerably and elderly people often find themselves in a situation of great dependence. Facing this situation, many have had the support of immigrant caregivers from Latin America. This research had the purpose to know the social representations (SR) of these caregivers, living in Valencia (Spain), about immigration, care and elderly care. It involved the participation of 35 immigrants who responded the Word Association Test and a socio-demographic questionnaire. The results revealed that the SR on immigration reflect "nostalgia", care was represented by "help", and care for the elderly by "respect". It is concluded that the SR allow understanding the symboli…
Balancing Roles of Representation in the European Commission
2008
Representation is one essential dimension of executive governance. This article has a dual ambition: The first is to outline an institutional perspective on representation that may explore and explain the everyday balancing act of representation among government officials. The second ambition is to empirically illuminate dynamics of representation among crucial test-bed inside the European Commission, that of temporary officials. Temporary Commission officials offer a valuable laboratory for exploring the fine balancing act of representation. Based on survey and interview data on temporary Commission officials, this study supports an institutional perspective on representation in two ways. …
Parliamentary Actors as Politicians
2018
The chapter discusses the horizon of chances of elected parliamentarians as politicians. Parliamentary representation is based on the freedom from dependence with its four classical faces: free speech, free mandate, freedom from arrest as well as free and fair elections. Special attention is given to the dualism between the partisan commitment as the basis of electing members and the freedom from dependence as the basic of parliamentary operations of members. The professionalisation of parliamentarians provides a condition to master the rules of procedure and rhetoric of debate in order to control government and bureaucracy.
Representative bureaucracy and seconded national government officials in the European Commission
2015
The bureaucratic arms of modern international organizations increasingly consist of staff with ambiguous organizational affiliations. This article analyses the implications of this trend from the perspective of representative bureaucracy – using seconded national experts (SNEs) in the European Commission (Commission) as the empirical laboratory. Using a variety of datasets, we unveil Commission SNEs' profiles (to assess their passive representativeness) and link these profiles to their role perceptions (to evaluate their potential for active representation). This illustrates that Commission SNEs' background characteristics do not match those of their constituent population (i.e. the EU27 po…
On the Non-uniform Redundancy of Representations for Grammatical Evolution: The Influence of Grammars
2018
The representation used in grammatical evolution (GE) is non-uniformly redundant as some phenotypes are represented by more genotypes than others. This article studies how the non-uniform redundancy of the GE representation depends on various types of grammars. When constructing the phenotype tree from a genotype, the used grammar determines Bavg, the average branching factor. Bavg measures the expected number of non-terminals chosen when mapping one genotype codon to a phenotype tree node. First, the paper illustrates that the GE representation induces a bias towards small trees. This bias gets stronger with lower Bavg. For example, when using a grammar with Bavg = 0.5, 75% of all genotype…
Variable selection in mixed models: a graphical approach
2014
Model selection can be defined as the task of estimating the performance of dif- ferent models in order to choose the (approximate) best one. The purpose of this article is to introduce an extension of the graphical representation of deviance proposed in the framework of classical and generalized linear models to the wider class of mixed models. The proposed plot is useful in determining which are the important explanatory variables conditioning on the random effects part. The applicability and the easy interpretation of the graph are illus- trated with a real data examples.
The sensorimotor and cognitive integration of gravity.
1998
In order to demonstrate that gravity is not only a load acting locally and continuously on the body limbs, but is also used by higher levels of the nervous system as a dynamic orienting reference for the elaboration of the motor act, a review of several experiments conducted both in 1 g and 0 g are presented. During various locomotor tasks, the strategy that consists of stabilizing the head with respect to gravity illustrates one of the solutions used by the CNS to optimize the control of dynamic equilibrium. A question which remains to be solved when considering experimental results obtained in weightlessness concerns, however, the maintenance of motor schema that has evolved under normal …