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The direct scattering problem for an inhomogeneous lossy medium is examined for the one-dimensional case in which the phase velocity profile is discontinuous at the boundaries of the medium. Scattering operators (or impulse responses) and propagation operators are defined and equations that govern their behavior are developed. Knowledge of the scattering kernels for one round trip in the medium im
Background. Sampling of submucosal lesions in the gastrointestinal tract through a flexible endoscope is a well-recognized clinical problem. One technique often used is endoscopic ultrasound-guided fine-needle aspiration, but it does not provide solid tissue biopsies with preserved architecture for histopathological evaluation. To obtain solid tissue biopsies from submucosal lesions, we have const
Cloud computing technology provides the means to share physical resources among multiple users and data center tenants by exposing them as virtual resources. There is a strong industrial drive to use similar technology and concepts to provide timing sensitive services. One such domain is a chain of connected virtual network functions. This allows the capacity of each function to be scaled up and d
Massive MIMO has been shown, both in theory and through experiments, to offer very promising properties. These include the possibility to decrease output power by at least an order of magnitude while still achieving large gains in spectral efficiency, as compared to today’s access schemes. To efficiently design communication algorithms and evaluate massive MIMO schemes, channel models that capture
The aim of this study was to analyze the long-term effect of the two health-promoting and disease-preventive interventions, preventive home visits and senior meetings, with respect to morbidity, symptoms, self-rated health and satisfaction with health. The study was a three-armed randomized, single-blind, and controlled trial, with follow-ups at one and two years after interventions. A total of 45
The present invention provides a method for optimizing elastic flows in a multi-path network for a traffic demand by jointly determining a bandwidth for each flow in a set of flows that realize the traffic demand and an optimized path for the traffic demand by maximizing a fairness utility. The present invention can be implemented as a computer program embodied on a computer readable medium in whi
Calls for more robust societal emergency management capacities have grown shriller as the range of societal vulnerabilities widens. The development of workable plans is recognised as one means to increase capacity. However, scepticism persists that plans serve any significant function in guiding organisational emergency management. Plans nevertheless remain a de facto requirement for most organisa
In this article, John Locke's accounts of political liberty and legitimate government are read as expressions of a normative demand for non-arbitrariness. I argue that Locke locates infringements of political liberty in dependence on the arbitrary will of another, whether or not interference or restraint actually takes place. This way Locke is tentatively placed in that tradition of republican tho
I denna studie insisterar vi över en ny experimentell innovativ idé, nämligen ”live interaktion” via webbkamera. Vi ger, därmed, vår lösning till en bättre och tätare feedback med en hög grad av flexibilitet. Vi jämför våra resultat med campusutbildning.
Intestinal spirochetes (Brachyspira spp.) are causative agents of intestinal disorders in animals and humans. Phylogenetic analysis of cloned 16S rRNA genes from biopsies of the intestinal mucosa of the colon from two Swedish 60-years old adults without clinical symptoms revealed the presence of intestinal spirochetes. Seventeen clones from two individuals and 11 reference strains were analyzed an
The effects of self-consistency in the GW-approximation are studied. The $GWA$ is known to describe the electronic properties of a wide range of materials very well. However, the calculations made so far have not taken into account the issue of self-consistency, which is implied in the original formulation of the $GWA$. The role of self-consistency is investigated by calculating the electronic sel
