Efficient dielectric matrix calculations using the Lanczos algorithm for fast many-body G0W0G_0W_0 implementations

We present a $G_0W_0$ implementation that assesses the two major bottlenecks of traditional plane-waves implementations, the summations over conduction states and the inversion of the dielectric matrix, without introducing new approximations in the formalism. The first bottleneck is circumvented by converting the summations into Sternheimer equations. Then, the novel avenue of expressing the dielectric matrix in a Lanczos basis is developed, which reduces the matrix size by orders of magnitude while being computationally efficient. We also develop a model dielectric operator that allows us to further reduce the size of the dielectric matrix without accuracy loss. Furthermore, we develop a scheme that reduces the numerical cost of the contour deformation technique to the level of the lightest plasmon pole model. Finally, the use of the simplified quasi-minimal residual scheme in replacement of the conjugate gradients algorithm allows a direct evaluation of the $G_0W_0$ corrections at the desired real frequencies, without need for analytical continuation. The performance of the resulting $G_0W_0$ implementation is demonstrated by comparison with a traditional plane-waves implementation, which reveals a 500-fold speedup for the silane molecule. Finally, the accuracy of our $G_0W_0$ implementation is demonstrated by comparison with other $G_0W_0$ calculations and experimental results.Comment: 19 pages, 2 figure

Caregiver Support within the Dementia Context: Best Practices in Responding to Ambiguous Loss

The purpose of this study was to use the concept of ambiguous loss as a lens to explore common challenges that family caregivers experience when caring for a loved one with dementia. This study attempted to collect qualitative data from licensed social workers who have experience working with family members and their diagnosed loved ones. Key findings made in this study include the different forms in which ambiguous loss may cause distress on behalf of caregivers: A physical presence yet psychological absence (an example of boundary ambiguity) on behalf of the diagnosed individual, the loss of future potential on behalf of spousal-caregivers, and role changes within the family system. Other findings include the tendency for caregivers to isolate themselves from outside support due to the private nature of caregiving and a possible stigma against support group attendance. Research recommendations as well as recommendations to social workers within the dementia context are also discussed. Given the relative infancy of the current research base regarding ambitious loss within the dementia context, it is important that future studies continue to examine the nuanced form of grief that individuals face when caring for a loved one with a neurodegenerative disease

Caregiver Support within the Dementia Context: Best Practices in Responding to Ambiguous Loss

The purpose of this study was to use the concept of ambiguous loss as a lens to explore common challenges that family caregivers experience when caring for a loved one with dementia. This study attempted to collect qualitative data from licensed social workers who have experience working with family members and their diagnosed loved ones. Key findings made in this study include the different forms in which ambiguous loss may cause distress on behalf of caregivers: A physical presence yet psychological absence (an example of boundary ambiguity) on behalf of the diagnosed individual, the loss of future potential on behalf of spousal-caregivers, and role changes within the family system. Other findings include the tendency for caregivers to isolate themselves from outside support due to the private nature of caregiving and a possible stigma against support group attendance. Research recommendations as well as recommendations to social workers within the dementia context are also discussed. Given the relative infancy of the current research base regarding ambitious loss within the dementia context, it is important that future studies continue to examine the nuanced form of grief that individuals face when caring for a loved one with a neurodegenerative disease

Le point de vue des aidants familiaux sur les services en santé mentale offerts à leurs proches

La présente étude a été menée auprès de 40 aidants familiaux membres d'associations de soutien aux familles et amis de personnes souffrant de maladie mentale. Ces aidants ont été rencontrés individuellement afin de documenter leur opinion sur les services en santé mentale offerts à leur proche. L'analyse de leurs commentaires témoigne à la fois de l'expression de satisfaction et d'insatisfaction au sujet de l'organisation des services par la quasi-totalité des participants. Toutefois, la question de l'organisation des services, plus spécifiquement en rapport avec leur accessibilité, entraîne le plus grand nombre de commentaires d'insatisfaction.Caregivers: their perspective on mental health services offered to relatives The current study has been conducted with 40 caregivers who are part of family support groups of people suffering of mental disorders. These caregivers have been interviewed individually in order to document their opinion on mental health services offered to their relatives. Analysis of their comments indicate both the expression of satisfaction and lack of it regarding organisation of services by most participants. However, the issue of service organisation, and more specifically in relation with access, entail the greatest number of comments of dissatisfaction.El punto de vista de ayudantes familiares sobre los servicios de salud mental ofertos a sus próximos La investigación presente ha sido realizada con 40 ayudantes familiares miembros de asociaciones de apoyo a las familias y amigos de personas que padecen de enfermedad mental. Los ayudantes han sido encontrados individualmente para documentar su opinoón de los servicios en salud mental ofertos a sus próximos. La análisis de sus comentarios demuestra a la vez una expresión de satisfacción y de insatisfacción de la organisación de los servicios para la quasi totalidad de los participantes. Sin embargo, la cuestión de la organisación de los servicios, más especificamente en relación a su accesibilidad, demuestra un nombre más importante de comentarios de insatisfacción.O ponto de vista dos assistentes familiares sobre os serviços em saúde mental oferecidos a seus parentes O presente estudo foi realizado junto a 40 assistentes familiares, membros de associações de apoio a famílias e amigos de pessoas que sofrem de doenças mentais. Estes assistentes foram consultados individualmente para documentar sua opinião sobre os serviços em saúde mental oferecidos a seus parentes. A análise de seus comentários demonstra a satisfação e, ao mesmo tempo, a insatisfação, com respeito à organização dos serviços, na quase totalidade dos participantes. Entretanto, a questão da organização dos serviços, mais especificamente em relação à sua acessibilidade, recebe o maior número de comentários de insatisfação

log(TG)/HDL-C is related to both residual cardiometabolic risk and β-cell function loss in type 2 diabetes males

<p>Abstract</p> <p>Background</p> <p>T2DM is associated with atherogenic dyslipidemia (AD), defined as decreased HDL-C plus raised triglycerides (TG). AD confers increased risk for CAD, even when LDL-C is at target. AD is rarely assessed due to lack of screening methods consensus.</p> <p>Aim</p> <p>To establish the prevalence and severity of AD from <it>log</it>(TG)/HDL-C in T2DM males, and to determine how it relates to cardiometabolic phenotype, glucose homeostasis, micro- and macrovascular complications, and 10-year <it>UKPDS </it>CV risk.</p> <p>Methods</p> <p>585 T2DM males divided according to quintiles (Q) of <it>log</it>(TG)/HDL-C. AD prevalence defined as HDL-C <40 mg.dL^-1plus TG ≥150 mg.dL^-1. β-cell function assessed with HOMA.</p> <p>Results</p> <p>Mean HDL-C and TG were 44 (13) and 204 (155) mg.dL^-1. AD prevalence was 35%. AD correlated with lower β-cell function, with accelerated loss of insulin secretion, and with poorer HbA_1clevels. AD was related to a high prevalence of CAD, and also to 10-year absolute CAD risk.</p> <p>Conclusions</p> <p><it>log</it>(TG)/HDL-C is a simple means to estimate AD and the residual CV risk it confers in T2DM. AD closely associates with major cardiometabolic and glucose homeostasis determinants and poorer metabolic control. The ratio also relates to macroangiopathy prevalence and ranks future CAD risk, and is well-suited to capture non-LDL-related macrovascular residual risk and major glycemic determinants.</p

Delacroix in Morocco. In front of horse in human culture

La présentation des chevaux dans l’Exposition sur “Delacroix au Maroc”, en 1832, parue ici (1994, p. 405-406), est suivie d’un prolongement culturel. I. Sur les emplois comparés du cheval marocain et des nôtres. II. Sur l’esthétique choisie, surtout dans l’orientalisme. Ainsi deux civilisations se distinguent.The presentation of horses in the exhibition “Delacroix in Morocco”, 1832, published herein (1994, p. 405-406), is suited hy its cultural extension through the two following topics. I) The comparative uses of morocan horses and ours. II) The aesthetic choices, especially in orientalism. So, two civili sations can be distinguished

Les méfaits du Bétail du droit burgonde au Code rural

Rousseau Michel. Les méfaits du Bétail du droit Burgonde au Code rural. In: Bulletin de l'Académie Vétérinaire de France tome 115 n°4, 1962. pp. 147-152