Algebraic disturbances and their consequences in rotating channel flow transition

It is now established that subcritical mechanisms play a crucial role in the transition to turbulence of non-rotating plane shear flows. The role of these mechanisms in rotating channel flow is examined here in the linear and nonlinear stages. Distinct patterns of behaviour are found: the transient growth leading to nonlinearity at low rotation rates $Ro$, a highly chaotic intermediate $Ro$ regime, a localised weak chaos at higher $Ro$, and complete stabilization of transient disturbances at very high $Ro$. At very low $Ro$, the transient growth amplitudes are close to those for non-rotating flow, but Coriolis forces already assert themselves by producing distinct asymmetry about the channel centreline. Nonlinear processes are then triggered, in a streak-breakdown mode of transition. The high $Ro$ regimes do not show these signatures, here the leading eigenmode emerges as dominant in the early stages. Elongated structures plastered close to one wall are seen at higher rotation rates. Rotation is shown to reduce non-normality in the linear operator, in an indirect manifestation of Taylor--Proudman effects. Although the critical Reynolds for exponential growth of instabilities is known to vary a lot with rotation rate, we show that the energy critical Reynolds number is insensitive to rotation rate. It is hoped that these findings will motivate experimental verification, and examination of other rotating flows in this light

Spain and the populist radical right: Will Vox become a permanent feature of the Spanish party system?

Vox won the third largest share of the vote in Spain’s general election in November. But is the success of the party a temporary phenomenon or a sign that populist radical right parties are destined to become a permanent feature of the Spanish party system? Lisa Zanotti and José Rama write that while political resentment and the Catalan independence issue created fertile ground for Vox, the party may find its future growth limited by the resilience of the left-right political cleavage in Spanish politics

Madrid’s regional election: how we got here, what happened, and why it matters

On 4 May, the Popular Party, led by Isabel Díaz Ayuso, doubled their share of seats in a snap regional election in Madrid. Stuart J. Turnbull-Dugarte and José Rama react to the result, which also prompted the resignation of Pablo Iglesias, the leader of Podemos

Défices neuro-psicológicos nas perturbações internalizantes e externalizantes: Implicações para aumentar a eficácia das intervenções cognitivo-comportamentais em crianças e adolescentes

Over the past three decades, our understanding of the nature, assessment and treatment of childhood mental disorders has increased significantly. Some of the most recent advances come from transdiagnostic and neuropsychological-based approaches. While the relationship of similar neuropsychological deficits with some mental disorders, such as neurodevelopmental and severe mental disorders like schizophrenia or bipolar disorder, is widely established, there is more controversy about their relationship with the so-called internalizing and externalizing disorders. In this article, our goal was to highlight the potential of incorporating cognitive strategies from integrative neuropsychological and transdiagnostic approaches to improve the effectiveness of empirically-supported cognitive-behavioral therapy for internalizing and externalizing mental disorders in childhood and adolescence. The results of the present work indicate that the vast majority of internalizing disorders, including the presence of anxiety, depressive, trauma- and stress-related, and obsessive-compulsive and related disorders, as well as externalizing symptoms (corresponding to conduct disorder and ODD), present neuropsychological deficits and that their consideration may be relevant to improve the effectiveness of psychotherapeutic interventions in children and adolescents by incorporating neuropsychology-based assessment and treatment tools. The inclusion of neuropsychological support strategies in therapy for childhood mental disorders implies an advance and has clear implications for the enhancement of psychological care for childhood mental disorders.Ao longo das últimas três décadas, a nossa compreensão da natureza, avaliação e tratamento das perturbações mentais na infância aumentou significativamente. Alguns dos avanços mais recentes derivam de abordagens transdiagnósticas e neuropsicológicas. Embora a relação de défices neuropsicológicos com algumas perturbações mentais, como as perturbações neurodesenvolvimentais e com perturbações mentais graves, como a esquizofrenia e a perturbação bipolar, seja amplamente reconhecida, existe maior controvérsia acerca da sua relação com as perturbações internalizantes e externalizantes. Este artigo teve como objetivo destacar o potencial de incorporar estratégias cognitivas derivadas de abordagens transdiagnósticas neuropsicológicas integradoras para aumentar a eficácia de tratamentos cognitivo-comportamentais empiricamente validados para perturbações internalizantes e externalizantes na infância e na adolescência. Os resultados do presente trabalho indicam que tanto a vasta maioria de perturbações internalizantes (incluindo perturbações de ansiedade, perturbações depressivas, perturbações relacionadas com trauma e fatores de stress, e perturbações obsessivo-compulsivas e relacionadas) como perturbações externalizantes (como perturbação do comportamento e perturbação desafiante de oposição), apresentam défices neuropsicológicos, e que a consideração destes défices pode ser relevante para melhorar a eficácia de intervenções psicoterapêuticas com crianças e adolescentes, incorporando ferramentas neuropsicológicas de avaliação e tratamento. A inclusão de estratégias neuropsicológicas de suporte na intervenção terapêutica para as perturbações mentais infantis implica um avanço e tem implicações claras na melhoria de cuidados psicológicos a esta população

Vox, Covid-19, and populist discourses in Spain

The radical right party Vox has been a harsh critic of the Spanish government’s handling of the Covid-19 pandemic. José Javier Olivas Osuna and José Rama present findings from an analysis of the speeches made by the party’s leader, Santiago Abascal, during the first wave of the crisis. They write that Abascal’s interventions became increasingly populist as the pandemic progressed. There is also evidence of a ‘spillover’ effect, with the level of populism displayed by other parties also increasing

Who are Vox, and who are their voters?

The populist radical right party Vox has emerged as a major force in Spanish politics, but what characterises the party and its voters? Drawing on a new study, José Rama, Stuart J. Turnbull-Dugarte and Andrés Santana present a comprehensive assessment of the party’s ideological makeup and the key features of its electoral base

Effects of equatorially-confined shear flow on MRG and Rossby waves

Linear modal stability analysis of a mean zonal shear flow is carried out in the framework of rotating shallow water equations (RSWE), both under the $\beta$-plane approximation and in the full spherical coordinate system. Two base flows -- equatorial easterly (EE) and westerly (EW) -- with Gaussian profiles highly confined to small latitudes are analyzed. At low Froude number, mixed Rossby-gravity (MRG) and Rossby waves are found to be particularly affected by shear, with prominent changes at higher wavenumbers. These waves become practically non-dispersive at large wavenumbers in EE. The perturbations are found to be more confined equatorially in EE than in EW with the degree of confinement being more pronounced in the $\beta$-plane system compared to the full spherical system. At high Froude number, the phase speeds are significantly larger in the $\beta$-plane system for all families of waves. Under the $\beta$-plane approximation, exponentially unstable modes can be excited, having negative (positive) phase speed in EE (EW). Strikingly, this flow is always neutrally stable with the full spherical system. This speaks for the importance of studying the whole spherical system even for equatorially confined shear

Caracterización de un modelo de sistema de información interorganizacional para el sector de la edificación domótica

El sector de la edificación es uno de los principales sectores económicos con grandes repercusiones en el conjunto de la sociedad y en los valores culturales que entraña el patrimonio arquitectónico y, sin embargo, carece de una regulación acorde. La imparable evolución de las TIC y la cultura de la competencia han provocado la aparición de nuevos servicios y operadores. Por ello, el presente estudio, basado en un trabajo de investigación empírico, propone la caracterización de un sistema de información interorganizacional (SIIO) entre los diversos agentes que configuran la cadena de valor del sector de la edificación. El objetivo es la mejora de gestión en las interrelaciones entre los diferentes agentes de cara a abordar proyectos de edificación más complejos, contribuyendo, en particular, a la mejora de la calidad de la vivienda y, por tanto, a la calidad de vida de la sociedad en general

Inter-organizational information systems adoption for service innovation in building sector

The building sector has experienced a significant decline in recent years in Spain and Europe as a result of the financial crisis that began in 2007. This drop accompanies a low penetration of information and communication technologies in inter-organizational oriented business processes. The market decrease is causing a slowdown in the building sector, where only flexible small and medium enterprises (SMEs) survive thanks to specialization and innovation in services, which allow them to face new market demands. Inter-organizational information systems (IOISs) support innovation in services, and are thus a strategic tool for SMEs to obtain competitive advantage. Because of the inherent complexity of IOIS adoption, this research extends Kurnia and Johnston's (2000) theoretical model of IOIS adoption with an empirical model of IOIS characterization. The resultant model identifies the factors influencing IOIS adoption in SMEs in the building sector, to promote further service innovation for competitive and collaborative advantages. An empirical longitudinal study over six consecutive years using data from Spanish SMEs in the building sector validates the model, using the partial least squares technique and analyzing temporal stability. The main findings of this research are the four ways an IOIS might contribute to service innovation in the building sector. Namely: a) improving client interfaces and the link between service providers and end users; b) defining a specific market where SMEs can develop new service concepts; c) enhancing the service delivery system in traditional customer?supplier relationships; and d) introducing information and communication technologies and tools to improve information management