Filtyp
Most conventional ECG interpretation programs use decision tree logic for interpretation of the ECG. The performance is generally good but can be improved. Artificial neural networks represent a new computer method, which has proved to be of value in pattern recognition and classification tasks. The purpose of the studies in this thesis was to improve the analysis/interpretation of the 12-lead EC
This thesis focuses on electrical transport in semiconductor InAs nanowires grown by chemical beam epitaxy. Initially, transport length scales of homogeneous InAs n-type nanowires are characterized by low-temperature magnetoconductance measurements. The measurements show phase-coherent conductivity corrections. By fitting the data, we find the nanowire mean-free path to be 50 nm and the phase-cohe
As quality and performance demands on today’s products increases, more and more advanced materials are being used during modern production. The problem is however that this in turn place new demands on the machining processes utilized. Even though a significant amount of research has been published on the machining of these materials knowledge is still limited in several crucial areas. A problem w
We are interested in the effect of harvesting on population fluctuations and for that purpose we develop and analyze an age-structured model where recruitment is a stochastic process and the adult segment of the population is harvested. When a constant annual harvest is taken the coefficient of variation of the adult population increases for most parameter values due to the age truncation effect,
Starches and celluloses can be chemically modified in order to affect their physiochemical properties. Modification of these carbohydrate polymers entails derivatising their free hydroxyl groups with functional groups. Which properties are obtained depends on the nature of the functional groups as well as on how they are distributed throughout the polymeric structure of the carbohydrate. Unfortuna
In this thesis I present studies concerning genomic diversity and genetic heterogeneity as well as the evolution and maintenance of genetic variation at a specific immune defence gene in Atlantic salmon (Salmo salar, L.). I here present data on nucleotide diversity showing that human activities as well as different post-glacial colonisation events have had considerable effects on the genomic diver
Title. Contested streets. Political marches in Stockholm, 1887–1920.Abstract. Repertoires of contention change. It is clear that during the 19th and early 20th century, swedes learned to stage marches to make political claims, something that was virtually unknown in Sweden before the mid-19th century. At first, the oligarchy that held power in Sweden mostly accepted political marching in the stree
Abdominal aortic aneurysm (AAA) develops in 3-6% of the population over 65 years and affects mainly men. AAA has a complex etiology involving inflammation, proteolysis, fibrinolysis and coagulation. The general aim of the present thesis was to study the associations between markers of inflammation, proteolysis, fibrinolysis and coagulation with aneurysm size and growth. In paper I associations bet
NADH:quinone oxidoreductase, or complex I, is a large, complex and poorly understood bioenergetic enzyme in the respiratory chain of living organisms. The enzyme has a conserved core structure, comprising fourteen protein subunits: Seven subunits protrude from the membrane and contain a flavin prosthetic group and eight iron-sulfur clusters that guide electrons from the oxidation of NADH towards t
Continuum based elasto-plastic-damage models for paperboard have been established in this work. The thesis begins with an introductory section that describes the mechanical properties of paperboard and some of the converting processes during forming of a package. A short review of modeling concepts that have been applied to paperboard is presented and then some key aspects and assumptions develope
It is commonly argued that the private sector needs to become actively involved for society to stand a chance of solving the most pressing global problems. This thesis, consisting of five articles previously published in refereed journals and an introductory essay, studies one case of private actor participation in global environmental governance: the Kyoto Protocol’s Clean Development Mechanism (
This thesis deals with signal processing algorithms for analysis of the electrocardiogram (ECG) during atrial fibrillation (AF). Such analysis can be used for diagnosing patients, and for monitoring and predicting their response to various treatment. The thesis comprises an introduction and five papers describing methods for ECG-based modeling and characterization of AF. Paper I--IV deal with meth
This thesis makes a contribution to strategy-proof social choice theory, in which one investigates the conditions under which it is possible to construct social choice functions (i.e., voting procedures) that can never be manipulated in the sense that some voter, by misrepresentation of his true preferences, can change the outcome of a voting and obtain an alternative he prefers to the one that ho
The objective of this thesis is to contribute to improved performance of district heating systems by focusing on three items. Item 1: Study of three methods for improving the performance of sub-systems within buildings connected to the distribution network. The methods can be considered as more or less innovative. Results from two of these measures are quantified in terms of so-called Primary Ener
It it of great importance to increase the knowledge of various cell cycle kinetic parameters and the objective of this thesis is to use stochastic models to interpret Bromodeoxyuridine (BrdUrd) DNA Flow Cytometry (FCM) derived data in order to estimate such parameters. The cell cycle is the process of growth and division that is essential for an organism to increase in size. The cell cycle consist
During the last decades, coherent anti-Stokes Raman spectroscopy (CARS) has been an important tool in combustion research. The focus of this thesis is the improvement of the capability of the pure rotational CARS (RCARS) technique for this type of applications. The technique is used to measure temperatures and relative species concentrations in the gas phase and thermometry is performed by fitting
Emissions from anthropogenic combustion sources, such as light duty vehicles and small scale biomass combustion, contribute significantly to ambient aerosol particle concentrations both on local and global scales. These emissions have controlling impacts on public health and global climate. The overall aim of this thesis was to investigate how atmospheric transformation and combustion conditions a
The aim of this study is to examine the development of linguistic proficiency in written production of second-language French. In a longitudinal study of 30 months, we follow the written production of 5 guided learners of French as a second language. In order to apprehend proficiency we use the conventional parameters fluency, complexity and accuracy. The fluency and complexity are apprehended by
he hematopoietic development is a highly dynamic but tightly regulated process. The flexibility to produce blood cells through more than one route will allow the blood system to respond rapidly in stress situations such as infections. On the other hand, regulation of the blood system is required to prevent blood cells from uncontrolled proliferation that could result in leukemia or bone marrow fai
