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Timing the appearance of photosynthetic microorganisms is crucial to understanding the evolution of life on Earth. The ability of the biosphere to use sunlight as a source of energy (photoautotrophy) would have been essential for increasing biomass and for ...
Context For evidence-based practice to embed culturally in the workplace, teaching of evidence-based medicine(EBM) should be clinically integrated. In low-middle-in come countries (LMICs) there is a scarcity of EBM-trained clinical tutors, lack of protecte ...
We present a systematic comparison of tropospheric NO2 from 17 global atmospheric chemistry models with three state-of-the-art retrievals from the Global Ozone Monitoring Experiment (GOME) for the year 2000. The models used constant anthropogenic emissions ...
Over the last two decades, globalisation has accelerated international migration flows, particularly of skilled labour. Yet, increasing migration by skilled workers from developing countries (“brain drain”) has raised serious concerns internationally about ...
The Southern African Development Community (SADC) has evolved in 1992 from the former Southern African Development Coordination Conference (SADCC) existing since 1980. The SADC aims at regional integration, sustainable growth and alleviation of poverty in ...
Precipitation is an important component of the Earth' water cycle and needs to be carefully monitored. Its large variability over a wide range of spatial and temporal scales must be taken into account. For example, hydrological models require accurate rain ...
Over the last two decades, globalisation has accelerated international migration flows, particularly of skilled labour. Yet increasing migration by skilled workers from developing countries («brain drain») has raised serious concerns internationally about ...
We describe the predictions of an analytically tractable stochastic model for cholera epidemics following a single initial outbreak. The exact model relies on a set of assumptions that may restrict the generality of the approach and yet provides a realm of ...
Version-4 of the Goddard Earth Observing System (GEOS-4) General Circulation Model (GCM) was employed to assess the influence of potential changes in aerosols on the regional circulation, ambient temperatures, and precipitation in four selected regions: In ...
Aujourd'hui, l'Afrique du Sud est à un tournant de son histoire car si la politique de ségrégation de l'espace a enfanté un urbanisme planifié, la réalité des quartiers informels qui prolifèrent en périphérie ( et désormais à l'intérieur même de la ville) ...
