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IMPROVED SUPPLY OF DISTRICT HEAT TO HYDRONIC SPACE HEATING SYSTEMS

The studies presented in this thesis concern hydronic space heating systems connected via heat exchangers to a district heating network: referred to as an indirect connection. The objective has been to improve the reliability of district heat supplies and to lower the return temperature from consumer substations. Two of the disadvantages of an indirect connection have been addressed: the thermodyn

Gamow -Teller Beta Decay in Drip Line Nuclei

Before radioactive ion beams became available, the Gamow-Teller (GT) giant resonance was studied using charge-exchange reactions such as (p,n) and (He,t). In beta-stable nuclei, which can be used as targets, the GT giant resonance lies above the ground state of the mother nucleus. In this thesis the GT strength distribution is studied for deformed proton drip line nuclei with 28 < Z < 72. For thes

Dysfunction between policy and industry

There are many market and organisational barriers to the breakthrough of a new industrial field such as bioenergy. For many observers, recent high prices of oil and the significant policy support measures throughout Europe, would appear to have created economic conditions that should be sufficient for the industry to prosper. However, a significant number of policies supposed to expand bioenergy (

The Dispersion of Eye Movements During Visual Imagery is Related to Individual Differences in Spatial Imagery Ability

This study explored individual differences in eye movements during visual imagery. Eye movements were recorded for participants who recalled a picture from memory while looking at a blank screen. All participants were tested for working memory capacity and the OSIVQ (Blazhenkova & Kozhevnikov, 2009) was used as an assessment for individual differences in object imagery, spatial imagery and ver

Null referential subjects in Oevdalian

In this article, Oevdalian referential null subjects are introduced and analysed. A general background to Oevdalian is provided, whereupon the syntactic restrictions of the possible null subjects (wįð ('we') and ið ('you')) are presented. Interestingly, these null subjects do not appear in the same syntactic positions; whereas null ið seems to be unrestricted, null wįð may only appear in positions

The American Way? Swedish-American returnees in local Swedish politics during the 1920s

Swedish emigration to America is a topic that does not hold a major position in Swedish historical research anymore. At one time, during the 1960s and 1970s, there were a major research project, Sweden and America after 1860, that focused primarily on the reasons of the migration, the demographics of the migration and to some extent what happened to the emigrants in America. The research project d

The Jitter Margin and Its Application in the Design of Real-Time Control Systems

Based on recent advances in control theory, we propose the notion of jitter margin for periodic control tasks. The jitter margin isdefined as a function of the amount of constant delay in the controlloop, and it describes how much additional time-varying delay can betolerated before the loop goes unstable. Combined with schedulingtheory, the jitter margin can be used to guarantee the stability and