A Family of Exact, Analytic Time Dependent Wave Packet Solutions to a Nonlinear Schroedinger Equation

We obtain time dependent $q$-Gaussian wave-packet solutions to a non linear Schr\"odinger equation recently advanced by Nobre, Rego-Montero and Tsallis (NRT) [Phys. Rev. Lett. 106 (2011) 10601]. The NRT non-linear equation admits plane wave-like solutions ($q$-plane waves) compatible with the celebrated de Broglie relations connecting wave number and frequency, respectively, with energy and momentum. The NRT equation, inspired in the $q$-generalized thermostatistical formalism, is characterized by a parameter $q$, and in the limit $q \to 1$ reduces to the standard, linear Schr\"odinger equation. The $q$-Gaussian solutions to the NRT equation investigated here admit as a particular instance the previously known $q$-plane wave solutions. The present work thus extends the range of possible processes yielded by the NRT dynamics that admit an analytical, exact treatment. In the $q \to 1$ limit the $q$-Gaussian solutions correspond to the Gaussian wave packet solutions to the free particle linear Schr\"odinger equation. In the present work we also show that there are other families of nonlinear Schr\"odinger-like equations, besides the NRT one, exhibiting a dynamics compatible with the de Broglie relations. Remarkably, however, the existence of time dependent Gaussian-like wave packet solutions is a unique feature of the NRT equation not shared by the aforementioned, more general, families of nonlinear evolution equations

Bem-estar e vulnerabilidade ao stresse em estudantes do ensino superior.

A entrada no ensino superior é habitualmente vista como uma etapa da vida que envolve novas oportunidades para os estudantes. Essa nova etapa está repleta de novos desafios e representa uma mudança, por vezes significativa, nos estilos de vida de cada estudante, bem como nas suas rotinas, exigindo que haja assim uma adaptação a estes novos ambientes. Num curto espaço de tempo, os estudantes vêem-se em situações desafiadoras e muito diferentes das que tinham enfrentado até então. Muitos são forçados a sair de casa e de perto das pessoas com quem sempre lidaram para irem para a universidade. São forçados a lidar com novos desafios, que podem constituir-se como ameaças ao seu bem-estar e novas fontes de stresse, para os quais nem sempre se consideram preparados. Entre os desafios mais comummente apontados têm sido referidos, p. exemplo, orientarem-se numa nova cidade, partilhar a habitação com colegas desconhecidos, perda da privacidade, gestão do dinheiro, gestão do tempo (Canha, 2009). Muitos são também confrontados com o facto de terem a liberdade e a autonomia que antes não tinham que lhes exige um reforçado sentido de responsabilidade, uma vez que, para a maioria dos estudantes, já não têm por perto um adulto que supervisione e regule as ameaças ao seu bem-estar. Assim sendo, neste capítulo propomos a caracterização do bem-estar e da vulnerabilidade ao stresse em alunos universitários, a frequentar a licenciatura, de forma a compreender quais os fatores que podem ameaçar o seu bem-estar e que podem despoletar o stresse e perceber o que, em contrapartida, os faz sentir bem consigo mesmos.FCT e três projetos ENABLIN+ (Leonardo Da Vinci), Cognition & Inclusion (ERASMUS+) e LLL-HUB (Lifelong Learning Programm) e da I Conferência Europeia em Life Long Learning (realizada na Universidade de Évora com os apoios do Departamento de Psicologia e da Escola de Ciências Sociais), e da Associação Portuguesa de Gestão de Pessoas (APG) e a Associação Nacional para a Qualificação e Ensino Profissiona

Effects of dual blockade in heart failure and renal dysfunction: Systematic review and meta-analysis

OBJECTIVE: The effect of dual renin-angiotensin system (RAS) inhibition in heart failure (HF) is still controversial. Systematic reviews have shown that dual RAS blockade may reduce mortality and hospitalizations, yet it has been associated with the increased risk of renal dysfunction (RD). Surprisingly, although RD in patients with HF is frequent, the effect of combining RAS inhibitors in HF patients with RD has never been studied in a meta-analysis. METHODS: A systematic review and meta-analysis of randomized clinical trials involving HF patients with RD who received dual blockade analyzing death, cardiovascular (CV) death or HF hospitalization, and adverse events. RESULTS: Out of 2258 screened articles, 12 studies were included (34,131 patients). Compared with monotherapy, dual RAS inhibition reduced hazard ratio of death to 0.94 (p=0.07) and significantly reduced CV death or HF hospitalization to 0.89 (p=0.0006) in all individuals, and to 0.86 (p=0.005) in patients with RD and to 0.91 (p=0.04) without RD. Nevertheless, dual RAS blockade significantly increased the risk of renal impairment (40%), hyperkalemia (44%), and hypotension (42%), although discontinuation of treatment occurs only in 3.68% versus 2.19% (p=0.00001). CONCLUSIONS: Dual RAS inhibition therapy reduces the risk of CV death or HF hospitalization. However, cautions monitoring for specific adverse events may be warranted

Reproduction of the blue jack mackerel, Trachurus picturatus, in western Portugal: microscopic gonad analysis reveals indeterminate fecundity and skipped spawning patterns

Blue jack mackerel, Trachurus picturatus, is the fifth most landed fish species in mainland Portugal, but information on its reproductive biology is scarce. From September 2018 to August 2019, 626 specimens were collected from commercial vessels to clarify the reproductive strategy of the T. picturatus population off the west coast of Portugal. The proportion and length range of males and females were similar. Only three of the specimens collected were categorized as immature, indicating that the fish caught in the fishery are primarily mature. The spawning season lasted from late January until the end of March, with gonadosomatic indices being similar for males and females. Fecundity was indeterminate, and estimated batch fecundity ranged between 6,798 (at 25.4 cm TL) and 302,358 oocytes (at 33.8 cm TL). The low number of females showing direct evidence of imminent or recent spawning suggests a low number of spawning events. In addition, 12.7% of females were considered non-reproductive due to ovary abnormalities including parasitic infection by Kudoa species, atretic structures and skipped spawning events. This study highlights the importance of accounting for skipped spawning events and ovary abnormalities in the management of species fisheries.info:eu-repo/semantics/publishedVersio

Nature of b-1,3-Glucan-Exposing Features on Candida albicans Cell Wall and Their Modulation

Funding Information: This work was supported by a programme grant from the UK Medical Research Council (MR/M026663/1; MR/M026663/2) and by the Medical Research Council Centre for Medical Mycology (MR/N006364/1; MR/N006364/2). NARG acknowledges Wellcome support for a Senior Investigator (101873/Z/13/Z), Collaborative (200208/A/15/Z; 215599/Z/19/Z) and Strategic Awards (097377/Z11/Z). MGN was supported by an ERC Advanced Grant (833247) and a Spinoza Grant of the Netherlands Organization for Scientific Research.Peer reviewedPublisher PD