Sökresultat

European Americans are often treated as a homogeneous group, but in fact form a structured population due to historical immigration of diverse source populations. Discerning the ancestry of European Americans genotyped in association studies is important in order to prevent false-positive or false-negative associations due to population stratification and to identify genetic variants whose contrib

We have investigated the oxidation/reduction behaviour of dome-shaped three-dimensional islands of Ge on Si(001) grown by UHV-CVD at 620°C. The oxidation was done by exposing the surfaces to a steam of H₂O in N₂. The reduction was done in H₂, which at T<800 °C selectively reduces GeO₂ only. The results of the oxidation/reduction processes under varying c

In this paper, we present a statistical evaluation of an outdoor-to-indoor multiple-input multiple-output (MIMO) measurement campaign performed at 5.2 GHz. 159 measurement locations in an office building are analyzed. Our analysis pays special attention to two key assumptions that are widely used in stochastic channel models. An assumption that is used in practically every channel model is that th

TINA is an open, object oriented, distributed telecom architecture, with many concepts taken directly from the latest computer research. In TINA, instances of the same object type can be placed on different physical nodes. Therefore, the network performance can be improved by introducing load balancing algorithms. These algorithms should distribute the traffic between the object instances in such

In this paper, we give an overview of the background for, the ideas behind, and the challenges to be addressed in the project "Spatio-Temporal Filtering Methods for Enhancement and Separation of Speech Signals," which is funded by the Villum Foundation. The project aims at addressing the problem of enhancing and separating speech signals from noisy mixtures, a problem also known as the cocktail pa

The performance of an iris recognition system depends greatly on how well the iris segmentation part of the system performs its task. The performance of an iris segmenta- tion algorithm can be evaluated using different criteria and methods. Some of the methods evaluate the performance of the segmentation algorithm based on the performance of the whole iris recognition system. Other methods evaluat

Labeled analogs to an antiproliferative naphthoxyloside have been synthesized and evaluated. Our investigations have shown that the fluorescently labeled analogs are poor structural analogs, and the physical and biological properties are altered to a large extent. Instead, a radioactively labeled compound was synthesized, which made it possible to follow the pathway in the cell. The results showed

A new chemical reactor, the Open Plate Reactor, is being developed by Alfa Laval AB. It combines good mixing with high heat transfer capacity. With the new concept, highly exothermic reactions can be produced using more concentrated reactants. In the paper, the reactor type is presented and a process control system is developed.A utility system to provide the reactor with cooling water is designed

Heavy metals in cells are typically regulated by PIB-type ATPases. The first structure of the class, a Cu(+)-ATPase from Legionella pneumophila (LpCopA), outlined a copper transport pathway across the membrane, which was inferred to be occluded. Here we show by molecular dynamics simulations that extracellular water solvated the transmembrane (TM) domain, results indicative of a Cu(+)-release path

Over the last couple of decades an increasing use of temporary organizations has been observed in public administration, a development sometimes referred to as projectification. This article explores the political-administrative rationality of pro- jectification by studying the initiation and implementation of a project funding system regarding social investments in a Swedish municipality. In the Over the last couple of decades an increasing use of temporary organizations has been observed in public administration, a development sometimes referred to as projectification. This article explores the political-administrative rationality of pro- jectification by studying the initiation and implementation of a project funding system regarding social investments in a Swedish municipality. In the

This study investigates how accessing user-generated content in online user innovation communities (OUICs) may influence employee creativity. By analyzing a longitudinal dataset obtained from the IdeaExchange community of Salesforce.com, we find that employees who frequently access diverse and well-codified idea content contributed by external product users are likely to generate more ideas than t

The possibility that stem cells might be used to regenerate tissue is now being investigated for a variety of organs, but these investigations are still essentially exploratory and have few predictive tools available to guide experimentation. We propose, in this study, that the field of lung tissue regeneration might be better served by predictive tools that treat stem cells as agents that obey ce

This study analyses cross-border capital flows in order to verify the existence and direction of the effect of the soft regulation promoted by international organizations against banking secrecy which characterized the so called tax and financial heavens. This effect is called in the literature Stigma Effect, but both the existence and the direction of the stigma effect are far from being obvious.

In psychology as elsewhere, the main statistical inference strategy to establish empirical effects is null-hypothesis significance testing (NHST). The recent failure to replicate allegedly well-established NHST-results, however, implies that such results lack sufficient statistical power, and thus feature unacceptably high error-rates. Using data-simulation to estimate the error-rates of NHST-resu