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Popular Abstract in Swedish Fjärrvärme är en väletablerad teknik som främst används för uppvärmning av byggnader och varmvatten. I Sverige värms över 80% av flerbostadshusen med fjärrvärme, vilket innebär att de flesta svenskar faktiskt bor i ett fjärrvärmeuppvärmt hus. Fjärrvärme är inte enbart en svensk teknik, utan används över hela värden där behov av uppvärmning finns. Länderna i Norden och ÖThe 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

In a society increasingly characterized by cultural heterogeneity and where trust issues are becoming ever more important, new demands and dilemmas arise related to organizations’ strategic communication. This study investigates the struggles of contemporary organizations to achieve credibility and strengthen their social legitimacy as actors in Sweden’s multicultural society. The empirical case c

The neutral vacancy in Ge has been studied using a Green function method which is particularly well suited to point defects with highly localised bound-state wavefunctions.(16 refs)

The wireless propagation channel significantly influences the received signal, so that it needs to be modeled effectively. Extensive measurements and analysis are required for investigating the validity of theoretical models and postulating new models based on measurements. Such measurements, analysis, and modeling are the topic of this thesis. The focus of the included contributions are Multiple-

The operative treatment of mallet fractures of more than one third of the articular surface is controversial. The purpose of this study was to evaluate the complications and functional outcome of extension block pinning technique. Thirty-six consecutive patients with mallet fractures that involved more than one third of the joint surface were treated by extension block pinning a median of 3 days a

To address a diversified student complement in academic studies is becoming more and more frequent in maritime education and training. Diversity challenges are also the reality onboard ships that muster a multicultural crew complement. This thesis aims at creating awareness on dilemmas and challenges that students and faculty meet when working in a multicultural environment. In order not to have

Nissen fundoplication is an effective treatment for gastroesophageal reflux disease (GERD) but can cause adverse effects like flatulence and dysphagia. The aim was to compare laparoscopic anterior 120° fundoplication (APF) to total fundoplication (Nissen) concerning flatulence and other adverse effects, in a randomized blinded study.

We construct finite-dimensional representations of the quantum affine algebra associated to the simple finite-dimensional Lie algebra sl(n+1). The module structure is defined on the vector space tensor product of the fundamental representations of the quantum affine algebra. To do this, we find a particular basis of every fundamental representation, consisting of eigenvectors for some of the Drinf

The study aims to establish the effectiveness of the Danish destination certification scheme – Destination 21. In order to accomplish this, an analytical framework, based upon current tourism and development theory, was constructed against which the scheme was tested. The analytical framework consists from three analyses examining the schemes framework, substance and applicability. It was found th

Fire models are used increasingly for fire safety assessment in nuclear power plants. Examples of these fire models are CFD models and zone models. When using these models it is important that they are sufficiently verified and validated. In Sweden the majority of fire safety consultants are using FDS, developed by NIST. The verification and validation of this package is intensively done for a num