On the breaking and restoration of symmetries within the nuclear energy density functional formalism

We review the notion of symmetry breaking and restoration within the frame of nuclear energy density functional methods. We focus on key differences between wave-function- and energy-functional-based methods. In particular, we point to difficulties encountered within the energy functional framework and discuss new potential constraints on the underlying energy density functional that could make the restoration of broken symmetries better formulated within such a formalism. We refer to Ref.~\cite{duguet10a} for details.Comment: 5 pages, presented at the 17th nuclear physics conference "Marie and Pierre Curie", September 2010, Kazimierz Dolny, Polan

Defying grand narratives of ‘being an international student’: finding ‘home’ in the Other

The PhD students in this study create a sense of being at home as part of their own way of being themselves. Their programme requires and allows considerable autonomy in how they choose to be with the people around them. Different to common expectations of the ‘international student’, their nationality and its ‘culture’ being apart from the ‘culture’ they find is not the major factor. Instead they draw resources from their personal cultural trajectories within which their lives in Britain form another stage in a lifelong journey of identity construction. They do not ‘assimilate’ in the expected sense. Their friends are not mainly ‘British’. Their brought multilingualism is characteristic of a natural hybridity that prepares them to be different selves in diverse social locations and with people of diverse origin on and off campus through an ongoing negotiation process of small culture formation on the go

Skyrme functional from a three-body pseudo-potential of second-order in gradients. Formalism for central terms

In one way or the other, all modern parametrizations of the nuclear energy density functional (EDF) do not respect the exchange symmetry associated with Pauli's principle. It has been recently shown that this practice jeopardizes multi-reference (MR) EDF calculations by contaminating the energy with spurious self-interactions that, for example, lead to finite steps or even divergences when plotting it as a function of collective coordinates. As of today, the only viable option to bypass these pathologies is to rely on EDF kernels that enforce Pauli's principle from the outset by strictly and exactly deriving from a genuine, i.e. density-independent, Hamilton operator. We wish to develop the most general Skyrme-like EDF parametrization containing linear, bilinear and trilinear terms in the density matrices with up to two gradients, under the key constraint that it derives strictly from an effective Hamilton operator. The most general three-body Skyrme-like pseudo-potential containing up to two gradient operators is constructed to generate the trilinear part. The present study is limited to central terms. Spin-orbit and tensor will be addressed in a forthcoming paper. (See paper for full abstract)Comment: 38 pages revtex, no figur

Defying grand narratives of ‘being an international student’: finding ‘home’ in the Other

The PhD students in this study create a sense of being at home as part of their own way of being themselves. Their programme requires and allows considerable autonomy in how they choose to be with the people around them. Different to common expectations of the ‘international student’, their nationality and its ‘culture’ being apart from the ‘culture’ they find is not the major factor. Instead they draw resources from their personal cultural trajectories within which their lives in Britain form another stage in a lifelong journey of identity construction. They do not ‘assimilate’ in the expected sense. Their friends are not mainly ‘British’. Their brought multilingualism is characteristic of a natural hybridity that prepares them to be different selves in diverse social locations and with people of diverse origin on and off campus through an ongoing negotiation process of small culture formation on the go

Breaking and restoring symmetries within the nuclear energy density functional method

We review the notion of symmetry breaking and restoration within the frame of nuclear energy density functional methods. We focus on key differences between wave-function- and energy-functional-based methods. In particular, we point to difficulties to formulate the restoration of symmetries within the energy functional framework. The problems tackled recently in connection with particle-number restoration serve as a baseline to the present discussion. Reaching out to angular-momentum restoration, we identify an exact mathematical property of the energy density $E^{LM}(\vec{R})$ that could be used to constrain energy density functional kernels. Consequently, we suggest possible routes towards a better formulation of symmetry restorations within energy density functional methods.Comment: 16 pages, 3 figures, contribution to the "Focus issue on Open Problems in Nuclear Structure", Journal of Physics

Skyrme effective pseudopotential up to the next-to-next-to-leading order

The explicit form of the next-to-next-to-leading order ((NLO)-L-2) of the Skyrme effective pseudopotential compatible with all required symmetries and especially with gauge invariance is presented in a Cartesian basis. It is shown in particular that for such a pseudopotential there is no spin-orbit contribution and that the D-wave term suggested in the original Skyrme formulation does not satisfy the invariance properties. The six new (NLO)-L-2 terms contribute to both the equation of state and the Landau parameters. These contributions to symmetric nuclear matter are given explicitly and discussed

TYPOLOGIE DES PHRASEOLOGISMES PRAGMATIQUES DE LA CRISE SANITAIRE COVID-19

Cet article a pour objet la description des énoncés gestes barrières qui ont forgé d’une manière ou d’une autre une certaine éducation sanitaire durant la pandémie de la Covid-19. Voire, dans ses premiers mois où la prévention est l’unique solution pour gérer les situations de détresse, le temps d’identifier le virus, trouver un remède efficace, etc. D’un côté, cet article recense cinquante-trois énoncés tels qu’ils sont portés sur tous les espaces publics et privés, ou tels que dits par les spécialistes ou non de la santé pour d’abord interpeller les consciences, puis sensibiliser les uns les autres des dangers de la Covid-19 et enfin éviter la contamination des masses de personnes à la fois. On retrouve, ainsi, la sagesse et l’intérêt du dicton « Prévenir mieux que guérir ». De l’autre côté, il dégage les caractéristiques de ces énoncés du point de vue morphosyntaxique, pragmatique et il établit une typologie selon le degré de pragmaticité dans le sens de Dostie G. et Sikora D., en phraséologismes pragmatiques faibles et phraséologismes pragmatiques forts

Le partenariat université- environnement économique en Algérie : un peu de réalisme

La mise en oeuvre des réformes économiques en Algérie pose des problématiques nouvelles dans le sens de l’adoption des méthodes et normes modernes à la recherche de la rationalité et de l’efficacité tant nécessaires au système de production libéral, tous les secteurs socio-économiques sans exception se débattant depuis plus d’une décennie, dans la conception et l’application de programmes de restructuration, de réadaptation et de mise à niveau. Ces réformes interviennent dans un contexte de forte interconnexion des économies nationales (mondialisation) régie par la liberté d’entreprise, la réduction croissante de la protection des économies et de l’intervention de l’Etat… d’une part, et surtout dans un contexte où les processus de production, révolutionnés par les NTIC, reposent donc de plus en plus sur l’utilisation et l’application des connaissances scientifiques et techniques, d’autre part.Dans ce sens la question du partenariat entre l’université et son environnement socioéconomique soulevée ici acquiert toute son importance et son actualité et par la présente réflexion nous voudrions mettre en exergue la nécessité de la prise en compte du contexte économique dans lequel elle est posée

0222: The information provided by the monitoring of recovery during a treadmill test

IntroductionThe diagnosis of myocardial ischemia on exercise testing (ET) is typically based on ST segment during exercise and its recovery. However, according to recent studies attention should be paid on exercise capacity but also the heart rate profile, particularly its recovery in the first minute with a diagnostic and especially prognostic value. The importance of these variables is more pronounced in women posing positive diagnostic problem in the ET.MethodsThis study included 350 women with type 2 diabetes (TD2), with mean age of 58.84 years. It consisted of practicing a maximum treadmill test (TT) according to the Bruce protocol.ResultsAfter a positive TT, coronary angiography was proposed to135 cases. The results are in favor of a truly positive TT in 35 patients (25.62%), in 33.51% it is infiltrations and in 40.31% coronaries appear healthy. Univariate analyses according to the variables of the TT, the ones who have a statistically significant positive correlation, are: HRR 1’ (p=0.008), the reservation of HR (HR max – HR rest) (p=0.02), and recovery time of ST depression (p=0.006). Multivariate analysis in confrontation with coronary angiography, those among others predicts significant coronary lesions: -amplitude ST segment (p=107 5) and its recovery time (p=0.08) -the HRC 1 ’(p=0.02), the global recovery time (p=0.02). The prediction performance of coronary anomaly is 87.88%.ConclusionWomen in the interpretation of ST shift can lead to misinterpretation and necessitate the study of parameters which include those in recovery. This work by using exercise testing may therefore allow stratification of coronary risk and especially to avoid the practice of coronary angiography after weakly positive effort