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A model of an industrial through-dryer for production of tissue paper was developed. The model can be used to predict the performance of a dryer section of an industrial through-drying machine consisting of one or more through-drying rolls separated by free draw sections. Roll diameters, wrap angles, machine speed, basis weight, initial paper moisture ratio, operating pressure differentials, dryin
Popular Abstract in Swedish Avhandlingens syfte är att söka kunskap om vilka faktorer som bidrar till uppfostringsanstaltens framgång som social institution och dess ständiga misslyckande som behandlingsorganisation. Jag försöker förstå varför organisationer som §12-hem och särskilda ungdomshem finns och vilken betydelse de har i vårt samhälle. Svaret på den frågan söker jag på tre sätt: genom attThe aim of the present study is to find the factors and conditions that generate the success of the reformatory as a social institution and, at the same time, its well-known failure as a treatment organization. I try to understand why organizations like the reformatory exist and what meaning they have in our society. I seek answers by exploring the birth of the reformatory in a historical perspect
This thesis consists of six parts in which methods for image analysis and processing are studied. Two-dimensional medical images, image sequences, and three-dimensional image volumes are considered. In the first part, the concept of optical flows (OF) is employed for restoring the contracting/expanding ventricle motion in ultrasonic echocardiograms. Radial velocities obtained by a scalar approach
Electrical machines, chokes and induction heaters are found in most homes,offices and factories all over the world. They are used to create movement, filtrate the power or to generate heat. A typical unit consist of a coil and a flux conductor material. Some of the materials have been established for over 100 years, while others are only a couple of decades old.A new flux conductor material has be
This essay reflects on the ”-ology of technology”, pace Brian Arthur (2009), as conveyed in theformal (i.e. mathematical) treatment of technology and innovation in economic theory. In thedecades from the 1970s economists of the evolutionary strand have levied criticism on the way inwhich technology is handled in mainstream economics. Some of this criticism has concerned theassumptions made in part
Denna avhandling fokuserar på svensk extraktivism i Sápmi/Norrbotten genom att studera den planerade järnmalmsgruvan i Gállok/Kallak och den gröna omställningen inom stålproduktionen. Huvudsyftet är att förstå tilltron till resursutvinning som ett sätt att nå en lycklig, grön, och god framtid. Med utgångspunkt i psykoanalys läser jag resursutvinning som ett begärsobjekt som människor söker sig tilThis dissertation deals with Swedish extractivism in Sápmi through the examples of a planned iron ore mine in Gállok/Kallak and the hydrogen-based steel transition. The main aim is to understand the trust that is placed in extraction as a means to arrive at a happy, prosperous, green future. Drawing on Lacanian psychoanalysis and Sara Ahmed’s notion of the promise of happiness, I suggest that extr
Photoredox properties of several earth-abundant light-harvesting transition metal complexes in combination with cobalt-based proton reduction catalysts have been investigated computationally to assess the fundamental viability of different photocatalytic systems of current experimental interest. Density functional theory (DFT) and time-dependent DFT (TD-DFT) calculations using several GGA (BP86, B
Background: Anastomotic leak affects 8 per cent of patients after right colectomy with a 10-fold increased risk of postoperative death. The EAGLE study aimed to develop and test whether an international, standardized quality improvement intervention could reduce anastomotic leaks.Methods: The internationally intended protocol, iteratively co-developed by a multistage Delphi process, comprised an o
Most large tidewater glaciers in Svalbard are known to have surged at least once in the last few hundred years. However, very little information exists on the frequency, timing or magnitude of surges prior to the Little Ice Age (LIA) maximum in ∼1900. We investigate the sediment-landform assemblages produced by multiple advances of the Nathorstbreen glacier system (NGS) in order to reconstruct its
A methodology for estimating the carbon balance across Scandinavian forests using remote sensing is presented. By estimating the gross primary production (GPP) and the ecosystem respiration (ER), and thereby, the net ecosystem exchange (NEE), using parameters that are routinely retrieved from satellite, it is possible to implement an operational model for obtaining large scale NEE. GPP is successf
The welding of dissimilar alloys is seen increasingly as a way forward to improve efficiencies in modern aeroengines, because it allows one to tailor varying material property demands across a component. Dissimilar inertia friction welding (IFW) of two high-strength steels, Aermet 100 and S/CMV, has been identified as a possible joint for rotating gas turbine components and the resulting welds are
In this thesis focus is on two aims: 1) to investigate the emergence and establishment of medieval rural archaeology as an archaeological field of study, from the 1930’s up until today and 2) based on the results made in this study, to discuss generally how new subject areas are incorporated and maintained within the humanities. Thus, the scope of the thesis does not lie on the medieval period wit
How does the brain transform the 2-D light arrays in our eyes into a meaningful 3-D description of surfaces around us? What assumptions does the visual system make about the world when information is incomplete? And how are these assumptions computationally expressed in this perceptual reconstruction process? These questions, and other aspects of binocular depth perception are analysed from a theo
This paper addresses the question of why metal- deficient barium stars are not yellow symbiotic stars ( YSyS). Samples of ( suspected) metal-deficient barium ( mdBa) stars and YSyS have been collected from the literature, and their properties reviewed. It appears in particular that the barium nature of the suspected mdBa stars needs to be ascertained by detailed abundance analyses. Abundances are
The objective of this work was to design and evaluate an experimental setup to be used for field studies of particle formation in biomass gasification processes. The setup includes a high-temperature dilution probe and a denuder to separate solid particles from condensable volatile material. The efficiency of the setup to remove volatile material from the sampled stream and the influence from cond
Popular Abstract in Swedish Den globala landbaserade kolcykeln reglerar mängden växthusgaser i atmosfären. För närvarande tas varje år 25-30% av våra utsläpp upp av de landbaserade ekosystemen vilket är en viktig ekosystemtjänst som kanske inte kommer att bestå i längden. Upptagskapaciteten av både hav och landbaserade ekosystem tenderar att försvagas av global uppvärmning. Detta leder till att enThe global terrestrial carbon cycle plays a pivotal role in regulating the atmospheric composition of greenhouse gases. Currently it is responsible for removing 25-30% of our emissions every year, an important ecosystem service that may not persist in the long term. Global warming tends to decrease the CO2 sink capacity of the world’s oceans and ecosystems leading to a larger fraction of our emiss
Popular Abstract in Swedish Då en struktur utsätts för varierande belastning kan brott uppstå vid väsentligt lägre last än vad som hade orsakat brott vid konstant lastnivå. Fenomenet kallas utmattning och berör många traditionella ämnen. För att kunna göra relevanta bedömningar av livslängden vid utmattningsbelastning krävs kunskap om materialets egenskaper, både mikroskopiskt och makroskopiskt, t
Why is waste such an important topic for understanding the management of overflow? First, because waste is a classic symbol of overflow: to be flooded with too much stuff that demands handling, sorting, and decision-making is a feeling well known in consumer society. Facts and figures speak of the same overflow. Waste disposal is a growing problem. The downside of consumption is a growing mountain
