a r t i c l e i n f o This paper investigates image processing and pattern recognition techniques to estimate atmospheric visibility based on the visual content of images from off-the-shelf cameras. We propose a prediction model that first relates image contrast measured through standard image processing techniques to atmospheric transmission. This is then related to the most common measure of ...

BACKGROUND There is a growing body of epidemiologic literature reporting associations between atmospheric pollutants and reproductive outcomes, particularly birth weight and gestational duration. OBJECTIVES The objectives of our international workshop were to discuss the current evidence, to identify the strengths and weaknesses of published epidemiologic studies, and to suggest future direct...

Five-year data of SO2, PM10, NO, NO2, O3 and CO levels recorded at two air pollution monitoring stations in the city of Salamanca were analysed using a HJ-Biplot Simultaneous Representation analysis method in order to determine the possible relationships among the different pollutants and to gain insight into the temporal evolution of pollution in this city. Use of this statistical method prove...

Daily and seasonal fluctuations in mortality have been positively and significantly associated with ambient concentrations of atmospheric pollution and meteorological variables such as temperature and barometric pressure. However, much less is known about the health risk from atmospheric pollutants in the context of frequently occurring weather patterns. The objective of this study is to assess...

In December 1968, during its annual meeting, the American Association for the Advancement of Science convened a symposium on the Global Effects of Environmental Pollution. In the words of the organizer of this symposium, Mr. S. Fred Singer, the purposes "were to discuss the worldwide effects which may arise from local pollution and to try to uncover, if possible, hitherto unsuspected effects wh...

In December 1968, during its annual meeting, the American Association for the Advancement of Science convened a symposium on the Global Effects of Environmental Pollution. In the words of the organizer of this symposium, Mr. S. Fred Singer, the purposes "were to discuss the worldwide effects which may arise from local pollution and to try to uncover, if possible, hitherto unsuspected effects wh...

Road traffic is a serious problem in the Chamonix Valley, France: traffic, noise and above all air pollution worry the inhabitants. The big fire in the Mont-Blanc tunnel made it possible, in the framework of the POVA project (POllution in Alpine Valleys), to undertake measurement campaigns with and without heavy-vehicle traffic through the Chamonix and Maurienne valleys, towards Italy (before a...