9 documents found, page 1 of 1

Synthesis, photophysical and spectroscopic characterization of amphiphilic D-A-...

Two positively charged amphiphilic benzothiadiazole derivatives with a Donor-Acceptor-π spacer-Acceptor structure (D-A-π-A) were developed, based on a methoxy-phenyl-benzothiadiazole model compound, by adopting methoxy-phenyl as the electron donor and 2,1,3-benzothiadiazole and 2,3-dimethylbenzothiazol-3-ium or 2,3-dimethylnaphtothiazol-3-ium iodide as combined electron acceptors. The aim of the study was to in...

Novel incremental conductance feedback method with integral compensator for max...

Research on renewable energy sources and power electronic converters has been increasing due to environmental concerns. Many countries have established targets to decrease CO2 emissions and boost the proportion of renewable energy, with solar power being a prominent area of investigation in the recent literature. Techniques are being developed to optimize the energy recovered from PV cells and increase system e...

Daily tobacco consumption and associated socioeconomic factors in the Portugues...

Smoking patterns inform tobacco control policies. This study aimed to assess trends in smoking prevalence and associated socioeconomic factors in Portugal between 1987 and 2014. We used data from National Health Interview Surveys (NHIS) conducted in 1987, 1995/96, 1998/99, 2005/06 and 2014/15. For each NHIS, we estimated gender-specific and age-standardized smoking prevalences, stratified by education, occupati...

Avaliação Integrada, Ecológica e Sociocultural do Salgado da Figueira da Foz na...

AD1D-1E23-B6C4 | Zara Fani Gonçalves Teixeira; N/A

Caraterísticas sociodemográficas dos fumadores em Portugal: análise comparativa...

Introdução: O consumo de tabaco é um importante fator de risco para várias doenças. O conhecimento das caraterísticas dos fumadores e sua evolução é essencial para planear e monitorizar as estratégias de prevenção do consumo. O objetivo deste trabalho é caraterizar os principais fatores socioeconómicos associados ao consumo de tabaco e sua tendência temporal. Métodos: Foram analisados os dados dos Inquéritos Na...

Trends in tobacco consumption and associated socioeconomic factors in Portugal

Smoking is a risk factor for several diseases. Knowing smoking patterns in the Portuguese population is important for planning preventative strategies. This study aims to evaluate describe the trends of tobacco consumption and measure the associated socioeconomic factors in Portugal from 1987 to 2014.

Matrix converter as unified power flow controller: design and implementation of...

This paper presents the design and implementation of direct power controllers for three-phase matrix converters (MC) operating as Unified Power Flow Controllers (UPFC). Theoretical principles of the decoupled linear power controllers of the MC-UPFC to minimize the cross-coupling between active and reactive power control are established. From the matrix converter based UPFC model with a modified Venturini high f...

Ossos do ofício : as alterações da entese numa amostra da coleção de esqueletos...

Dissertação de Mestrado em Evolução e Biologia Humanas, apresentada ao Departamento de Ciências da Vida da Faculdade de Ciências e Tecnologia da Universidade de Coimbra.; Os Marcadores de Stresse Músculo-esqueléticos (MSM), referentes às alterações da entese (AE), são usados frequentemente em reconstruções da atividade e da intensidade de trabalho em populações ancestrais (Niinimäki, 2011, 2012). Todavia, a cor...

Santos Rocha, a Arqueologia e a Sociedade do seu Tempo