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The present invention relates to a membrane pump and an apparatus comprising such a membrane pump. The membrane pump comprises a pumping chamber and a flexible member separating the pumping chamber into a first accumulation container and a second accumulation container. The flexible member is configured to be movable within the pumping chamber so as to vary a volume relationship between the first
Organic material, about half of which is water soluble, constitutes nearly 80% of the wet-season aerosol mass in the Amazon Basin, while soluble inorganic salts (predominantly ammonium bisulfate) represent about 15%. A detailed analysis of number distributions and the size-dependent chemical composition of the aerosol indicates that, in principle, the sulfate fraction could account for most of the
The present paper suggests a method to consider uncertainties in engineering structures in a computational scheme. Latin hypercube sampling is used to prepare input data of probabilistic parameters for subsequent deterministic simulations where the mechanical response is evaluated. The approach is applied on a pallet rack system where damaged columns and connector stiffnesses are considered as pro
Abstract is not available.
Despite the widely recognized importance of replications in software engineering, industrial replications in software engineering are still rarely reported. Although the literature provides some evidence about the issues and challenges related to conducting experiments and replications the practitioner's view of the issues and challenges has not been fully explored. This paper reports an industria
The essay discusses different aspects of the market for fish from the Baltic Sea. The first chapter introduces the subject and discusses why the market for fish is interesting and in particular why analyses of first-hand market prices can give insights into the effects of new regulations or natural variations changing the conditions for fisheries. Prices of different attributes of Baltic cod is
China has since the 1980s emerged as one of the world’s largest economies and the main emitter of carbon dioxide. Any attempt to combat global warming at the global level is therefore dependent on the future trajectory of Chinese emissions. In this paper we consider the effect of firm ownership on provincial emissions. The hypothesis is that private firms are economically more efficient than non-p
