Molecular Antennas and Photoactive Nanomaterials based on Energy Transfer Processes

110 p.

LC-MS based methods for phytosterols determination in oenological matrices. Targeted metabolomic study of Rioja grape varieties

221 p.+ anexos

A Real-Time Sliding Mode Control for a Wind Energy System Based on a Doubly Fed Induction Generator

In this paper, a real time sliding mode control scheme for a variable speed wind turbine that incorporates a doubly feed induction generator is described. In this design, the so-called vector control theory is applied, in order to simplify the system electrical equations. The proposed control scheme involves a low computational cost and therefore can be implemented in real-time applications using a low cost Digital Signal Processor (DSP). The stability analysis of the proposed sliding mode controller under disturbances and parameter uncertainties is provided using the Lyapunov stability theory. A new experimental platform has been designed and constructed in order to analyze the real-time performance of the proposed controller in a real system. Finally, the experimental validation carried out in the experimental platform shows; on the one hand that the proposed controller provides high-performance dynamic characteristics, and on the other hand that this scheme is robust with respect to the uncertainties that usually appear in the real systems.

A Data Dropout Compensation Algorithm Based on the Iterative Learning Control Methodology for Discrete-Time Systems

This paper deals with the convergence of a remote iterative learning control system subject to data dropouts. The system is composed by a set of discrete-time multiple input-multiple output linear models, each one with its corresponding actuator device and its sensor. Each actuator applies the input signals vector to its corresponding model at the sampling instants and the sensor measures the output signals vector. The iterative learning law is processed in a controller located far away of the models so the control signals vector has to be transmitted from the controller to the actuators through transmission channels. Such a law uses the measurements of each model to generate the input vector to be applied to its subsequent model so the measurements of the models have to be transmitted from the sensors to the controller. All transmissions are subject to failures which are described as a binary sequence taking value 1 or 0. A compensation dropout technique is used to replace the lost data in the transmission processes. The convergence to zero of the errors between the output signals vector and a reference one is achieved as the number of models tends to infinity.

Efficacy of a cognitive and behavioural psychotherapy applied by primary care psychologists in patients with mixed anxiety-depressive disorder: a research protocol

Background: In contrast with the recommendations of clinical practice guidelines, the most common treatment for anxiety and depressive disorders in primary care is pharmacological. The aim of this study is to assess the efficacy of a cognitive-behavioural psychological intervention, delivered by primary care psychologists in patients with mixed anxiety-depressive disorder compared to usual care. Methods/Design: This is an open-label, multicentre, randomized, and controlled study with two parallel groups. A random sample of 246 patients will be recruited with mild-to-moderate mixed anxiety-depressive disorder, from the target population on the lists of 41 primary care doctors. Patients will be randomly assigned to the intervention group, who will receive standardised cognitive-behavioural therapy delivered by psychologists together with usual care, or to a control group, who will receive usual care alone. The cognitive-behavioural therapy intervention is composed of eight individual 60-minute face-to face sessions conducted in eight consecutive weeks. A follow-up session will be conducted over the telephone, for reinforcement or referral as appropriate, 6 months after the intervention, as required. The primary outcome variable will be the change in scores on the Short Form-36 General Health Survey. We will also measure the change in the frequency and intensity of anxiety symptoms (State-Trait Anxiety Inventory) and depression (Beck Depression Inventory) at baseline, and 3, 6 and 12 months later. Additionally, we will collect information on the use of drugs and health care services. Discussion: The aim of this study is to assess the efficacy of a primary care-based cognitive-behavioural psychological intervention in patients with mixed anxiety-depressive disorder. The international scientific evidence has demonstrated the need for psychologists in primary care. However, given the differences between health policies and health services, it is important to test the effect of these psychological interventions in our geographical setting.

Luminescence and Magnetic Properties of Two Three -Dimensional Terbium and Dysprosium MOFs Based on Azobenzene-4,4 '-Dicarboxylic Linker

We report the in situ formation of two novel metal-organic frameworks based on terbium and dysprosium ions using azobenzene-4,4-dicarboxylic acid (H(2)abd) as ligand, synthesized by soft hydrothermal routes. Both materials show isostructural three-dimensional networks with channels along a axis and display intense photoluminescence properties in the solid state at room temperature. Textural properties of the metal-organic frameworks (MOFs) have been fully characterized although no appreciable porosity was obtained. Magnetic properties of these materials were studied, highlighting the dysprosium material displays slightly frequency-dependent out of phase signals when measured under zero external field and under an applied field of 1000 Oe.

Agentes Comunitários de Saúde, formação e perfil profissional: o caso de Duque de Caxias, RJ

Este estudo teve como objetivo analisar o perfil de trabalho e descrever a formação profissional dos Agentes Comunitários de Saúde (ACS) no Município de Duque de Caxias. Trata-se de um estudo descritivo e de abordagem quantitativa e qualitativa, com base em uma perspectiva de triangulação de métodos. A pesquisa foi dividida em dois momentos distintos durante a coleta de dados. No primeiro, reuniram-se informações que configurassem todo o histórico de implementação do trabalho dos ACS, desde o surgimento das primeiras equipes. No segundo momento, aplicou-se um questionário aos 51 ACS que compõem o quadro funcional, sendo 23 de unidades da Estratégia Saúde da Família (ESF) e 28 da Equipe de Agentes Comunitários de Saúde (EACS). Foram também realizadas entrevistas individuais com oito participantes. Na análise dos dados, foi possível: a) construir a trajetória histórica dos ACS no Município, incluindo seu perfil sociodemográfico; b) mapear e descrever o perfil e condições de trabalho, a formação dos ACS, o interesse e as motivações quanto à profissão, as atividades de educação em saúde realizadas e o vínculo do ACS com o enfermeiro. O campo de pesquisa foi o município de Duque de Caxias, situado na Baixada Fluminense, no Estado do Rio de Janeiro. Os resultados mostram que a maioria dos participantes é do sexo feminino (94,1%), se encontrava na faixa etária entre 40-49 anos (43%), possui o segundo grau completo (72,5%); por outro lado, apenas 29,4% participam de alguma associação ou sindicato que represente a categoria, 84,3%, atuam em média há mais de sete anos, 84,3 % consideram o seu serviço gerador de estresse, 62,7% não tiveram acesso a algum curso/capacitação antes de serem inseridos na prática. Entre os motivos para atuar como um ACS, citam-se: ajudar a comunidade, estar perto dos filhos e trabalhar perto de casa; já entre as desvantagens do trabalho estão condições precárias de trabalho e baixo salário/vinculo trabalhista precário. Entre as atividades educativas mais realiza, as orientações individuais sobre doenças predominou com 94,1%. Entre os ACS que atuam na ESF, o enfermeiro se destacam, por serem os profissionais que mais o acompanham na prática da educação em saúde (33,3%), seguido pelo dentista (29,2%). Conclui-se que os agentes apresentam fragilidades em reconhecer as suas atribuições no desempenho de suas atividades. A formação recebida se apresenta fora da proposta de mudança de modelo. Uma formação ampliada que permita uma maior compreensão de sua inserção profissional dentro da sociedade e especificamente no campo da saúde poderia mediar o reconhecimento e identidade profissional dos ACS que participaram deste estudo. Esta pesquisa está vinculada ao Grupo de Pesquisa Configurações do Trabalho, Saúde dos Trabalhadores e Enfermagem e à Pesquisa O trabalho dos Agentes Comunitários de saúde do Estado do Rio de Janeiro: análise comparativa entre municípios e regiões.