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We first revisit the mathematical modeling of the flexoelectric effect in the context of continuum mechanics at infinitesimal deformations. We establish and clarify the relation between the different formulations, point out theoretical and numerical issues related to the resulting boundary value problems, and present the natural extension to finite deformations. We then present a simple B-spline based computational technique to numerically solve the associated boundary value problems, which can be extended to handle unfitted meshes, hence allowing for arbitrarily-shaped geometries. Several numerical examples illustrate the flexoelectric effect in simple benchmark setups, as well as in new flexoelectric devices and metamaterials engineered for sensing or actuation. [ABSTRACT FROM AUTHOR]

Introduction: "Cluster suicides," also known as "suicide clusters," refer to a phenomenon in which a series of suicides occur within a specific community, group, or geographic area within a relatively short period of time. These suicides often appear to be interconnected, either through imitation or contagion, and may involve individuals who have some form of social or emotional connection to each other. Objectives: - Understanding the definition and characteristics of cluster suicides. - Analyzing common risk factors and triggers in cluster suicide cases. - Evaluating prevention and support strategies for affected individuals and communities. Methods: We conduct an analysis of this concept based on a sample of suicides that occurred in a Spanish region over an 8-year period (2015-2022). We will Analyzethe following aspects: - Definition and characteristics of cluster suicides. - Risk factors contributing to the occurrence of cluster suicides. - Examples of real cases or case studies illustrating this phenomenon. - The role of imitation and contagion in cluster suicides. - Prevention and support strategies, including education on warning signs and access to mental health services. - The impact of media coverage and how it can amplify the contagion effect. - Measures to reduce access to lethal means of suicide. Results: We will discuss about the results found: - Definition and characteristics of cluster suicides. - Risk factors contributing to the occurrence of cluster suicides. - Examples of real cases or case studies illustrating this phenomenon. - The role of imitation and contagion in cluster suicides. - Prevention and support strategies, including education on warning signs and access to mental health services. - The impact of media coverage and how it can amplify the contagion effect. - Measures to reduce access to lethal means of suicide. Conclusions: The main conclusions of our presentation are : - The importance of recognizing cluster suicides as a real and concerning phenomenon. - The need to address specific risk factors and triggers in affected communities. - The effectiveness of prevention and support strategies in reducing cluster suicide cases. - The importance of promoting media responsibility in suicide coverage. BIBLIOGRAPHY 1. Cluster Suicides: A Critical Review and Theoretical Framework" (2019) - Este estudio proporciona una revisión crítica de la literatura sobre cluster suicides y presenta un marco teórico para comprender mejor este fenómeno 2. "Clusters of Suicides and Suicide Attempts: Identification, Prediction, and Prevention" (2016) - Aunque este estudio no se centra exclusivamente en España, ofrece información sobre la identificación y prevención de clusters de suicidio que puede ser relevante. 3. "Epidemiology of Suicide in Spain, 1981–2008" (2012) - Proporciona una visión general de la epidemiología del suicidio en España, lo que podría ayudar a contextualizar los estudios específicos sobre clusters. Disclosure of Interest: None Declared [ABSTRACT FROM AUTHOR]

Introduction: Crisis resolution teams (CRTs) are a crucial component of mental health care, providing timely support to individuals experiencing acute mental health crises. This abstract delves into the concept of crisis and seeks to identify the patients who stand to benefit from these specialized services. Objectives: Defining crisis within the context of CRTs can be complex. It encompasses not only immediate emergencies but also broader mental health distress. Research suggests that suitable candidates for CRT interventions are those facing acute mental health crises : This includes individuals experiencing suicidal ideation, severe agitation, or severe emotional distress. La "Escala de Evaluación de Resolución de Crisis" (Crisis Resolution Team Assessment Tool, CRTAT) de Sonia Johnson es una herramienta diseñada para para medir la efectividad de los CRT y la duración de la intervención en crisis. Establece un límite de seis semanas como el período máximo durante el cual se debe ofrecer la atención en crisis. Existen otras escalas de evaluación para medir la eficacia de la resolución de crisis: 1. Escala de Intensidad de Crisis (CIS): se utiliza para medir la gravedad de la crisis y la necesidad de intervención inmediata. 2. Escala de Evaluación de Crisis de Brage Hansen (BCES): se enfoca en la evaluación de crisis suicidas y evalúa la intensidad de la ideación suicida y la urgencia de la intervención. 3. Escala de Evaluación de Crisis de Eriksson (ECAS): Diseñada para evaluar la intensidad de la crisis en pacientes psiquiátricos, la ECAS se centra en la agitación, la ansiedad y la angustia emocional. Methods: - Studies have explored the effectiveness of CRTs and the perspectives of service users. Understanding how patients perceive crisis and CRT services is crucial for tailoring interventions effectively. Results: Conclusions: - CRTs play a vital role in mental health care, offering timely support to individuals experiencing crises. While defining crisis is complex, suitable candidates often include those in acute distress requiring immediate intervention. Understanding the perspectives of service users and the diverse nature of crisis experiences informs effective crisis resolution strategies. Disclosure of Interest: None Declared [ABSTRACT FROM AUTHOR]

In this work, we present the application of ultrashort and intense laser pulses (110 fs @ 1 kHz; up to 1.1 mJ/pulse) to the micromachining of ceramics, specifically RubalitTM708S, a material based on alumina and widely used as a substrate in microelectronics. The mechanism for removing material is the so called direct ablation. It differs from thermal ablation of conventional lasers in the practically total absence of thermal effects which produces a remarkable increase of quality and precision of the machining. By means of an optical diffraction-based technique we find out the energy density threshold to work in the direct ablation regime. Adjusting the energy per pulse as well as the number of pulses, we are able to drill holes of the desired diameter and depth. In addition, processing is developed in air. We also demonstrate that high quality fs-laser micromachining is suitable for every ceramic, whatever the mechanical properties, with similar working parameters. In order to show this point, we have also processed sintered SiN, a material of wide-ranging interest in industry.En este trabajo presentamos la aplicación de pulsos láser ultracortos (110 fs @ 1 kHz; hasta 1.1 mJ/pulso) al micromecanizado de materiales cerámicos, en concreto RubalitTM708S, un material compuesto principalmente de alúmina y empleado en la industria microelectrónica. El mecanismo de eliminación de material es la ablación directa, que difiere de la ablación térmica empleada por los láseres convencionales en la prácticamente total ausencia de efectos térmicos, lo que redunda en un aumento significativo de la precisión y calidad del mecanizado. Mediante técnicas basadas en la difracción óptica determinamos el umbral de energía necesario para que tenga lugar el proceso de ablación directa. Con ese dato y regulando la energía por pulso y el número de pulsos somos capaces de producir mecanizados del diámetro y profundidad deseados. Además, el procesado se realiza en aire. Demostramos que es posible ejecutar micromecanizado de calidad mediante este procedimiento en cualquier material cerámico, independientemente de sus propiedades mecánicas, variando ligeramente los parámetros del proceso. En este caso, además de la alúmina hemos procesado SiN sinterizado, un material de uso extendido en la industria.

Nonlinear chirped pulse compression can be theoretically achieved to any order by using a nonplane grating with adequate groove spacing. We evaluate the holographic recording of a grating that compensates to the quadratic chirp. A suitable design is found, and the building tolerances are analyzed.