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Investigation of Water Mobility using Diffusion-Sensitive MRI: The Role of q-Space Imaging, High b-Values and Diffusion Time

Nuclear magnetic resonance (NMR) diffusometry provides important information about molecular motion on a microscopic scale. The advantage of NMR diffusometry is its ability to characterise microstructures non-invasively. This has made the method important not only in chemistry, biochemistry and materials science, but also in medicine. Diffusion-weighted magnetic resonance imaging (DW-MRI) has been

SIMULTANEOUS MAPPING OF DROPLETS SIZE AND CONCENTRATION IN SPRAYS USING STRUCTURED LASER ILLUMINATION PLANAR IMAGING

Structured Laser Illumination Planar Imaging (SLIPI) is used in combination with LIF/Mie ratio and two-side Mie imaging (dual-SLIPI) for a two-dimensional mapping of both the droplet Sauter Mean Diameter (SMD) and the extinction coefficient ( ). By means of combining the two techniques simultaneously, the local distribution of droplet concentration as well as the liquid volume fraction can also be

Stochastic Modelling of Image Acquisition, Interpolation and Scale-space smoothing

In this study, the problem of feature extraction by scale-space methods is addressed. The modeling of image acquisition, image interporation and scale-space smoothing is discussed, with particular emphasis on the influence of random errors and the interplay between the discrete and continuous representations. In doing so, new results are given on the stochastic properties of discrete and continuou

Study on the Level of Confidence for Roll-back Recovery with Checkpointing

Increasing soft error rates for semiconductor devices manufactured in later technologies enforces the use of fault tolerant techniques such as Roll-back Recovery with Checkpointing (RRC). However, RRC introduces time overhead that increases the completion (execution) time. For non-real-time systems, research have focused on optimizing RRC and shown that it is possible to find the optimal number of

Metabolic Control Points in Ethanolic Fermentation of Xylose by Saccharomyces cerevisiae

Popular Abstract in Swedish Vanlig bagerijäst, Saccharomyces cerevisiae, används i storskalig etanol framställning från majs och sockerrör. Användandet av dessa råvaror för etanolproduktion konkurerar dock med framställning av spannmål för föda och djurhushållning. Den här avhandlingen har syftat till att få bagerijäst att använda sockerarten xylos, som finns i stora halter i restprodukter från skBaker’s yeast, Saccharomyces cerevisae, has been engineered to utilize the pentose sugar xylose present in lignocellulose biomass for the production of ethanol. Currently ethanol production from xylose is slow which limits the implementation of said strains in industrial production. This thesis describes the investigation of several metabolic aspects that control the rate of xylose utilization by