Filtyp
In this study the effect of the dispersed state of soy phosphatidylcholine on emulsification is investigated. The emulsifier is either dispersed in the aqueous phase (coarsely, as small vesicles, as large vesicles), or it is dispersed in the oil phase. Oil-in-water emulsions are prepared with the emulsifier present in the different dispersed states. High-pressure homogenization is used for the emu
This thesis describes the physical chemistry of softwood kraft lignin in aqueous alkaline solutions. Both fundamental and applicational aspects are discussed. Kraft lignin originates either from pulp fibres or from black liquor produced by kraft cooking. In wood, the lignin is an anionic macromolecular colloid of relatively high molecular mass that is gradually depolymerised under the kraft cook.
Large eddy simulations are performed to study the effects of wind-wave direction misalignment of the neutral marine atmospheric boundary layer over a wavy wall. The results show that the wind-wave misalignment has a significant effect on the velocity profiles and the pressure fluctuation over the wave surface. These effects are not confined to the near wave surface region but extend over the whole
Popular Abstract in Swedish Diskret händelsebaserad simulering av tillverkningssystem är sällan använd i utvecklingsprocessen av tillverkningssystem. Många gånger dras slutsatsen att analyser som involverar simulering i sig själv ger ökade kostnader. Detta synsätt är inte korrekt eftersom analyser måste göras ändå. I denna avhandling visas på metoder att utnyttja simuleringstekniken genom tillverkDES is seldom used in the manufacturing system development process, instead it is usually used to cure problems in existent systems. This has the effect that the simulation study alone is considered being the cost driver for the analysis of the manufacturing system. It is argued that this is not a entirely correct view since the analysis has to be performed anyway, and the cost directly related to
The inability of organisations to develop successfully and their lack of a holistic view and of relevant quantitative facts are factors that played a major role in my choice of a research area for this and my licentiate thesis (Ljungberg, 1994). These two theses together represent the work conducted for the PhD degree. There is a strong need in this research area for increased insight into the de
The influence of extensive sedum-moss vegetated roofs on runoff water pollution loads was studied for four full scale installations located in southern Sweden. The aim of the study was to ascertain whether the vegetated roof behaves as a sink or a source of pollutants on annual basis. The pollution loads from vegetated roofs was also compared with the pollution loads from two non-vegetated roofs l
Previous studies have shown that female ECAs are more likely to be abused than male agents, which may cement gender stereotypes. In the study reported in this paper a visually androgynous ECA in the form of a teachable agent in an educational math game was compared with a female and male agent. The re-sults confirm that female agents are more prone to be verbally abused than male agents, but also
Abstract is not available
The cubic phase of monoolein (MO) has successfully been used for crystallization of membrane proteins. It is likely that the transition to a lamellar phase upon dehydration is important for the crystallization process, and that the internal dimensions of the lipid phases (i.e., water pore diameter) are crucial for the inclusion and the diffusion of membrane proteins. In the present study, we inves
A brief introduction to convolutional coding is given. The active distances are reviewed and shown to be an important tool for analyzing the error correcting capability of maximum-likelihood (ML) decoding of convolutional codes when communicating over a binary symmetric channel (BSC). Due to memory and delay constraints in practical coding schemes, convolutional codes often are either terminated o
Dewatering properties and sludge structure of anaerobically digested sludge were studied in relation to an increasing operational temperature. Sludge samples were taken from 5 pilot-scale CSTR reactors treating municipal sewage sludge with working volume of 20 L and operating at 33, 35, 37, 39 and 55 degrees C, respectively. The main parameters of interest were capillary suction time (CST), concen
Popular Abstract in Swedish Avhandlingen behandlar användandet av faltnings koder och Turbo koder för felkorrigering i radio system. Design av koder, avkodare samt metoder för återtransmission behandlas, i syfte att förbättra trafikkapaciteten i digitala radionätverk. Mer specifikt diskuteras design av låg-takts Turbo koder för spritt-spektrum fleranvändarsystem, list sekvens avkodning av länkade New wireless services such as mobile Internet, multimedia streaming and high speed packet data access are making their way to the market. Availability of low-cost equipment providing high transmission quality and efficient spectrum utilization is crucial to the success of these services. This thesis is a collection of papers that address an important step in this direction: efficient error control
