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A brief conceptual tutorial of multilevel analysis in social epidemiology: linking the statistical concept of clustering to the idea of contextual phenomenon.

Study objective: This didactical essay is directed to readers disposed to approach multilevel regression analysis (MLRA) in a more conceptual than mathematical way. However, it specifically develops an epidemiological vision on multilevel analysis with particular emphasis on measures of health variation (for example, intraclass correlation). Such measures have been underused in the literature as c

Towards a Standard Methodology for Greenhouse Gas Balances of Bioenergy System in Comparison with Fossil Fuel System, Biomass and Bioenergy

In this paper, which was prepared as part of IEA Bioenergy Task XV (“Greenhouse Gas Balances of Bioenergy Systems”), we outline a standard methodology for comparing the greenhouse gas balances of bioenergy systems with those of fossil energy systems. Emphasis is on a careful definition of system boundaries. The following issues are dealt with in detail: time interval analysed and changes of carbon

A Model for Integrating Environmental Aspects into Transport Purchasing

In logistics, transport purchasers are increasingly facing environmental challenges. The role of logistics managers is important because their decisions as to how and where resources are used can potentially have major impacts on the environment. The challenge for logistics managers is to determine how to incorporate environmental management principles into their daily decision-making processes. 1

The utility of relative environmental suitability (RES) modelling for predicting distributions of seabirds in the North Atlantic

Understanding spatial and temporal variability in the distribution of seabirds is fundamental for the conservation and management of marine ecosystems. In the absence of large-scale systematic survey data, the application of standard habitat modelling techniques to predict the at-sea distributions of seabirds at large spatial scales has been limited. In this study, we examine the utility of relati

Spatial Structures in Conrad’s Universe : The Tension between Opening and Closing as a Literary Device

Many attempts have been made to catch the essence of Joseph Conrad’s work by examining the contents of his ideas. This thesis argues instead that the important factor is the preferred spatial structures of his world-views and the interplay between them. Above all, Conrad’s work can be seen as a battle-ground between closing and opening structures. The former have a claustrophobic effect on the con

An NADH-Coupled Biosensor for Engineering Redox Metabolism in Saccharomyces cerevisiae

Popular Abstract in English The work described in this thesis is in the field of industrial biotechnology, which can be defined as a branch of biotechnology aimed at sustainable production of chemicals, materials and fuels with the help of microorganisms. Microorganisms are very diverse and possess a wide variety of enzymes allowing them to transform inexpensive molecules into valuable ones, or toBaker’s yeast, Saccharomyces cerevisiae’s potential in industrial biotechnology for producing valuable products e.g. biofuels, bulk chemicals, bio-flavours and pharmaceuticals is established. In order to achieve efficient production, the intracellular balance of the NADH/NAD + redox couple must be monitored and maintained, as this influences the feasibility of over 100 reactions in the cell. My ap

Innovative Bioreactors for the Degradation of Polycyclic Aromatic Hydrocarbons

The development of biological reactors for the treatment of toxic and recalcitrant organic pollutants is a complex task. Firstly, microbial inoculation, acclimation and selection must be optimized to provide the best microflora possible. Secondly, innovative technologies must be developed to overcome the intrinsic low degradation rates of hardly-degradable pollutants in order to allow short treatm