Utilização de fontes alternativas de dados de atividade urbana para apoio à gestão sustentável de tráfego

No âmbito do desenvolvimento de uma plataforma integrada de gestão de tráfego cooperativa, o presente trabalho explora o potencial de fontes alternativas de dados de atividade urbana, para prever condições de tráfego e auxiliar a estimativa dos impactes decorrentes do tráfego rodoviário. Para dois casos de estudo, em Aveiro e Badajoz, os sistemas de informação cooperativa mostraram ser ferramentas eficazes para a estimativa custos de ambientais relacionados com ruído, gases com efeito de estufa (CO2) e poluentes atmosféricos (NOX, HC, PM). Tendo em consideração os fatores de custo sugeridos na literatura e adaptados ao contexto geográfico do caso de estudo português, os impactos de emissões de CO2 tendem a assumir uma relevância significativa, seguidos da matéria particulada e ruído

Absolute ozone densities in a radio-frequency driven atmospheric pressure plasma using two-beam UV-LED absorption spectroscopy and numerical simulations

International audienceThe efficient generation of reactive oxygen species (ROS) in cold atmospheric pressure plasma jets (APPJs) is an increasingly important topic, e.g. for the treatment of temperature sensitive biological samples in the field of plasma medicine. A 13.56 MHz radio-frequency (rf) driven APPJ device operated with helium feed gas and small admixtures of oxygen (up to 1%), generating a homogeneous glow-mode plasma at low gas temperatures, was investigated. Absolute densities of ozone, one of the most prominent ROS, were measured across the 11 mm wide discharge channel by means of broadband absorption spectroscopy using the Hartley band centred at lambda = 255 nm. A two-beam setup with a reference beam in Mach--Zehnder configuration is employed for improved signal-to-noise ratio allowing high-sensitivity measurements in the investigated single-pass weak-absorbance regime. The results are correlated to gas temperature measurements, deduced from the rotational temperature of the N2 (C 3 {{{\Pi }}}u \to B 3 {{{\Pi }}}g , upsilo = 0 \to 2) optical emission from introduced air impurities. The observed opposing trends of both quantities as a function of rf power input and oxygen admixture are analysed and explained in terms of a zero-dimensional plasma-chemical kinetics simulation. It is found that the gas temperature as well as the densities of O and O2(b{}1{{{Sigma }}}g ) influence the absolute O3 densities when the rf power is varied

Dissertatio De Exuperantia Obsequii

DISSERTATIO DE EXUPERANTIA OBSEQUII Dissertatio De Exuperantia Obsequii ([1]r) Titelseite ([1]r) Cap. I. Generalia De Exuperantia Obseqvii. ([1]) Cap. II. Exuperantia Obseqvii Conjugalis. (7) Cap. III. De Exuperantia Obseqvii Filialis. (21) Corollaria ( - ) Beiträge ([2]r