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Florianópolis, Brazil

Bitencourt D.P.,Fundacentro | Manoel G.,National Institute for Space Research | Acevedo O.C.,Federal University of Santa Maria | Fuentes M.V.,University of Sao Paulo | And 3 more authors.
Meteorological Applications | Year: 2011

Intense wind events at the southern Brazilian coast cause severe socio-economic losses. Generally, such events have been associated with extratropical cyclones over the Southwest Atlantic Ocean. The purpose of this study is to identify favoured locations and the processes through which the winds are associated with the extratropical cyclones. Using a statistical analysis, the wind speed observed at nine meteorological stations was compared with cyclone depth and offshore distance. Both cyclone depth and location were obtained through an objective procedure of identifying and tracking. Generally, the winds are well associated with the extratropical cyclones only south of 28°S. Altitude also plays an important role in this relationship. Furthermore, the cyclones influence the observed wind field up to 1200 km inland at higher latitude locations. For stations near 28°S, cyclones further from the coast have an influence, but with smaller statistical significance. © 2010 Royal Meteorological Society. Source

Pinto T.N.O.,Fundacentro | Pinto T.N.O.,Brazilian Nuclear Energy Research Institute (IPEN) | Caldas L.V.E.,Brazilian Nuclear Energy Research Institute (IPEN)
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | Year: 2010

In recent years, the optically stimulated luminescence (OSL) technique has been used in personal dosimetry, and aluminum oxide (Al2O 3:C) has become a very useful material for this technique. The objective of this work was the determination of the transmission factors for beta radiation using Al2O3:C commercial dosimeters and the OSL method. The obtained results were similar to the transmission factors reported in the beta source calibration certificates. © 2009 Elsevier B.V. Source

Garrigou A.,University of Bordeaux 1 | Garrigou A.,University of Bordeaux Segalen | Baldi I.,University of Bordeaux Segalen | Jackson M.,Fundacentro
Work | Year: 2012

The use of pesticides is one of the techniques employed in modern agriculture and in particular in intensive agriculture. The risks for the environment and for worker health have been debated in western countries for about ten years. Recent developments in epidemiology, toxicology and ergotoxicology have clearly revealed that pesticides could harm the health of farmers (cancers, neurological diseases and reproductive disorders). Failures and shortcomings in the risk prevention systems have also come to light. This paper aims to address the risks associated to the use of pesticides in French vineyards. The chosen approach draws from an anthropological approach as well as from developments in ergotoxicology applied to the French vineyard work. We shall discuss the use of pesticides from the point of view of the transfer of technology. Our recent research has shown that this technology transfer was not completely controlled by the different stakeholders. © 2012 - IOS Press and the authors. All rights reserved. Source

Antonio P.L.,Brazilian Nuclear Energy Research Institute (IPEN) | Gronchi C.C.,Fundacentro | Oliveira R.A.P.,Federal University of Vale do Sao Francisco | Khoury H.J.,Federal University of Pernambuco | Caldas L.V.E.,Brazilian Nuclear Energy Research Institute (IPEN)
Radiation Measurements | Year: 2015

In this work, the response of the natural material Opal was studied in relation to its thermoluminescence (TL) and optically stimulated luminescence (OSL), after exposure to the gamma radiation of a 60Co source. The structure of the powdered Opal was verified using the X-ray diffraction, scanning electronic microscopy and energy-dispersive X-ray spectroscopy techniques. The material, in its stone form, was turned into powder and mixed to Teflon (also in powder) in three different concentrations, and then pellets were manufactured. The aim of this work was to evaluate the response of these pellets in high-doses of gamma radiation beams, and to observe their possible application as dosimeters, using the TL and OSL techniques. The dosimetric properties of the samples were analyzed by means of different tests, as: TL emission curves and OSL signal decay curves, reproducibility of TL and OSL response, minimum detectable dose, TL and OSL dose-response curves (5 Gy-10 kGy), and fading. The results obtained in this work, for the TL and OSL phenomena, demonstrated that the pellets of Opal + Teflon present an adequate performance e possibility of use as dosimeters in beams of high-dose gamma radiation. © 2015 Elsevier Ltd. Source

Querol M.P.,University of Helsinki | Seppanen L.,Finnish Institute of Occupational Health | Filho J.M.J.,Fundacentro
Producao | Year: 2015

Despite the importance of the expectations and visions of the actors involved in sustainable innovations, only the societal, motivational perspective is usually considered. The fact that local actors may have different multi-motivations is typically overlooked. The aim of this study is to examine and understand the multi-motivational perspectives in a sustainable production project. First, we introduce the concept of the object and analyze the case of a biogas production project as a mediating activity for making swine production more sustainable. We argue that the object of the activity, as manifested in motivational perspectives, shapes the way in which biogas production (BP) systems are implemented. The article concludes by discussing how the concept of object can be used to explore the actual and future possibilities of using artifacts for increasing the sustainability of production. Source

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