Search results for "53"

Multiwavelength monitoring of BD+53°2790 , the optical counterpart to 4U 2206+54

2005

We present the results of our long-term monitoring of BD+53 2790, the optical counterpart to the X-ray source 4U~2206+54. Unlike previous studies that classify the source as a Be/X-ray binary, we find that its optical and infrared properties differ from those of typical Be stars: the variability of the V/R ratio is not cyclical; there are variations in the shape and strength of the H$\alpha$ emission line on timescales less than 1 day; and no correlation between the EW and the IR magnitudes or colors is seen. Our observations suggest that BD+53 2790 is very likely a peculiar O9.5V star. In spite of exhaustive searches we cannot find any significant modulation in any emission line parameter …

Perception of university students on active teaching-learning strategies.

2018

El objetivo del estudio es analizar la percepción del alumnado sobre estrategias de enseñanza-aprendizaje activas. Participaron 96 estudiantes del grado de Enfermería de la Universidad Católica de Valencia, quienes recibieron parte del temario siguiendo las diferentes estrategias activas analizadas. Tras la aplicación de cada estrategia se administró un cuestionario para conocer la valoración que los alumnos hacían de cada una de ellas y si éstas habían ayudado a entender la materia. Los resultados señalan que el aprendizaje basado en problemas y el aprendizaje entre iguales son las mejores valoradas por el alumnado. Se pone de manifiesto que la introducción de estrategias didácticas activa…

Slow and fast methyl group rotations in fragile glass-formers studied by NMR

2000

Abstract The spin-lattice relaxation times of the selectively ring deuterated, fragile glass-formers propylene carbonate and toluene were compared with those measured for species which were specifically labeled at the methyl groups. It was found that the dynamics of the CD 3 group is strongly decoupled from that associated with the primary response of toluene, while for propylene carbonate the degree of decoupling is relatively weak. The experimental results could be described successfully using a model which takes into account the ring dynamics as well as those of the methyl group.

Wannier90 as a community code: new features and applications

2019

Wannier90 is an open-source computer program for calculating maximally-localised Wannier functions (MLWFs) from a set of Bloch states. It is interfaced to many widely used electronic-structure codes thanks to its independence from the basis sets representing these Bloch states. In the past few years the development of Wannier90 has transitioned to a community-driven model; this has resulted in a number of new developments that have been recently released in Wannier90 v3.0. In this article we describe these new functionalities, that include the implementation of new features for wannierisation and disentanglement (symmetry-adapted Wannier functions, selectively-localised Wannier functions, s…

Update of the Binoth Les Houches Accord for a standard interface between Monte Carlo tools and one-loop programs

2014

We present an update of the Binoth Les Houches Accord (BLHA) to standardise the interface between Monte Carlo programs and codes providing one-loop matrix elements.

The periodic reporting procedure of the United Nations System and the human right to water: opportunities and challenges

2020

A água é fundamental para a vida. Contudo, foi apenas nos anos 70 que o acesso a este bem começou a ser discutido, a nível internacional, como um direito humano. Antes disso, algumas Convenções e Tratados das Nações Unidas reconheciam, de alguma forma, o direito à água, mas tal direito tinha que ser inferido de outros direitos ou estava limitado à uma determinada categoria de pessoas. Independentemente das suas limitações, estes textos podem reforçar a aplicação do direito humano à água, especialmente através dos seus mecanismos de monitoramento: os relatórios periódicos e os casos litigiosos. Assim, o objetivo deste artigo é analisar em que medida o mecanismo de relatórios periódicos pode …

Asylum Seekers Crisis in Europe 2015: Debating Spaces of Fear and Security in Latvia

2015

Abstract In this paper we analyse emerging discourses of fear on the one hand and safety and security on the other. In the context of rupture - sudden, unprecedented asylum flows as well as the historical context of the fear and experience of losing the state’s freedom, we pose the following research question: Where do insecurities and fear come from and how are spaces of security and safety carved out through public discourses? We argue that, instead of singling out political discourses in Eastern European as filled with hatred towards other ethnicities and races or an inability to show solidarity with human suffering, we have to open up a far more deep reaching debate on the interplay of …

José Capuz Mamano (1884-1964), maestro de Helena Sorolla García (1895-1975)

2014

L'impacte d'una pandèmia. La pesta i el treball domèstic femení a la València de 1647-1648

2021

Novel isatin-derived molecules activate p53 via interference with Mdm2 to promote apoptosis

2018

International audience; The p53 protein is a key tumor suppressor in mammals. In response to various forms of genotoxic stress p53 stimulates expression of genes whose products induce cell cycle arrest and/or apoptosis. An E3-ubiquitin ligase, Mdm2 (mouse-double-minute 2) and its human ortholog Hdm2, physically interact with the amino-terminus of p53 to mediate its ubiquitin-mediated degradation via the proteasome. Thus, pharmacological inhibition of the p53-Mdm2 interaction leads to overall stabilization of p53 and stimulation of its anti-tumorigenic activity. In this study we characterize the biological effects of a novel class of non-genotoxic isatin Schiff and Mannich base derivatives (…