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The objective of this report was to investigate different types of glass when exposed to heat radiation from a typical fire in a dangerous goods carrier. The purpose was to evaluate if tempered glass could be used in facades instead of the more expensive fire resistant glass. Experiments were made in a cone calorimeter where different thicknesses of laminated, tempered and fire resistant glass wer
Huge amounts of greenhouse gases continuously released into the atmosphere is of large global concern. Carbon dioxide makes up a large part of released greenhouse gases. Especially the aircraft industry, which is experiencing a steady annual increase as air travel grows in popularity. This business sees 72% of all its combustion products in aircraft exhausts to be carbon dioxide. Swedavia, a compa
One of most ancient food preservation methods is freezing because there are not caused significant changes the sensory characteristics and nutritional value of foods. Last decade, have been made great steps for the optimization of freezing tolerance of fresh vegetables, fruits and species. Cold injury occurs when the cells are exposed to temperatures lower than 0oC. Cold injury is a consequence of
Inom socialtjänsten råder idag en hög personalomsättning bland socialarbetare, mer specifikt bland socialsekreterare. Tidigare forskning gjord bland socialsekreterare syftar främst till att undersöka orsaken till detta genom att hitta en förklaring till varför de väljer att lämna sin arbetsplats. Syftet med denna studie däremot var att undersöka vad som gör att socialsekreterarna, mer specifikt er
Interactive web-GIS tools play an important role in determining disaster risk assessment which ultimately result in reduction of unexpected damages, cost and saves millions of lives. Disaster management practitioners largely benefited information at their disposal about location where possible incidents are eminent, anticipate the impact and project possible outcomes to help mitigate and organize
The study circle is a cultural and educational phenomenon that has fundamentally affected Sweden and continues to do so even today. The present study investigates the Swedish study circle as a medium. This is done by looking at the notions about what the study circle would be during its early years (1902-1922), through the Swedish Good Templars and Oscar Olsson, also known as “the father of the st
Hafnium dioxide (HfO_2) based thin films doped with various dopants (Si, Ge, Al, Gd, Sr, Zr) have been found to exhibit ferroelectricity. These dopants were found to stabilize the III orthorhombic phase in the hafnium oxide based thin films. This characteristic enables and allows various applications ranging from Non-volatile memory, Ferroelectric Field-Effect-Transistors, to Negative Capacitance
Examensarbetet har utvecklat en metod för att estimera den fraktala dimensionen från Transmissions Elektron Mikroskop (TEM) bilder av sot aggregat som skapats med hjälp av en mini-CAST sotgenerator. Det är ett underbestämt problem att estimera den fraktala dimensionen, en 3D egenskap, från 2D bilder. Lösningen är syntetiserade TEM bilder som baserats på projektioner av numeriskt simulerade aggregaIn this master’s thesis a method for estimating the fractal dimension from Transmission Electron Microscope (TEM) images of soot aggregates has been developed, and also applied to TEM images of soot sampled from a mini-CAST soot generator. The problem to estimate the fractal dimension, a 3D property, from a 2D image is undetermined. To solve this, TEM images were synthesised based on projections o
Anxiety disorders and obsessive-compulsive disorder among women in the postpartum period are understudied and their impact upon maternal functioning is poorly understood. There is evidence that individuals with greater levels of psychological flexibility (the ability to persist in valued domains of living despite the presence of negative emotions/thoughts/sensations) and higher levels of social su
Abstract Sedan 70- och 80-talet har det forskats kring manligt och kvinnligt språk, främst genom samtal. Forskare har kommit fram till att män och kvinnor har olika samtalsstilar och att olika stereotyper finns rådande manligt och kvinnligt språk. Syftena med den här studien är att undersöka podcastlyssnares attityder till språket i podcaster i allmänhet och i synnerhet manligt och kvinnligt språk
This work presents the notion of free groups and the definition of a group using generators and relations. We use the Todd-Coxeter Algorithm in order to solve the coset enumeration problem for the finitely presented groups: $D_4,\, A_4,\, A_5,\, S_3,\, S_4,\, S_5,\, PSL_2(7),\, PSL_2(9)$. Then we use these presentations in order to prove the exceptional isomorphisms $A_5\cong PSL_2(5) \cong SL_2(4
Ungdomsspråk har studerats sedan senare 1900-tal. Ulla-Britt Kotsinas (1984) och Lars Gunnar Andersson (1985) finns bland de forskare som beskriver vilka funktioner som ungdomsspråket har bland ungdomar, bland annat skriver de om hur slang och svordomar kan användas som grupptillhörigehetsmarkörer. Slang, svordomar och ungdomsspråket generellt har en tendens att förändras och förnyas vilket gör de
In last decade, the lighting industry significantly changed with the development of light emitting diodes (LEDs) and their corresponding penetration of the market. The new technology increases energy efficiency and longevity compared to other types of lamps. As a result, LEDs can improve the sustainability performance of cities and towns, contributing to the mitigation of climate change and cuttin
Vad tänker du på när du hör ordet solprognos? För vissa är det viktigt i planeringen av semestern, andra kanske för att skydda sig mot farlig UV-strålning. Vad många inte vet är att solprognoser är en viktig komponent i vårt energisamhälle där förnyelsebara energikällor som solkraft och vindkraft ökar kraftigt runt om i världen. Att göra träffsäkra prognoser för inkommande solstrålning har dock viSolar radiation is affected in a variety of different ways through the atmosphere and on its way down to the Earth’s surface. Clouds are the main factor in this attenuation of solar radiation, but aerosols, ozone and other different gases have a significant impact too. Understanding these processes is fundamental to solar forecasting. However, the atmosphere is constantly changing, which makes for
This master thesis contributed to a project financed by the Swedish Energy Agency and managed by the housing company Eksta AB in collaboration with the consulting Company WSP. The main aim of this master thesis was to perform a theoretical optimization on the usage of own used solar electricity by transferring the surplus PV between buildings in a demonstration area in a DC-microgrid. To achieve th
Delay discounting and time perspective, two similar but not identical constructs, are associated with consequential choices in the financial and health domain. Six gaps in the literature comparing the predictive validity of delay discounting and time perspective are identified and their importance for longitudinal studies is discussed. The most extensive comparison of consequential choices in the
Landscape fragmentation and decreasing habitat areas poses a threat to biodiversity worldwide. Green infrastructure has developed as a conservation approach promoting habitat connectivity on a landscape scale. However, green infrastructure is much more than a network of natural structures and elements enabling species movement. It represents a new mode in environmental protection policy, addressin
Samarbete i grupp påverkas av kompositionen av medlemmarnas personlighetsdrag. Syftet med denna studie var således att undersöka hur skillnad av personlighetsdrag inom Big Five-teorin korrelerade med uppgiftskonflikt, gruppsammanhållning och kommunikation. Vidare undersökte studien hur skillnaden påverkade uppsatsgruppers prestation. De personlighetsdrag som undersöktes var öppenhet, vänlighet och
Deep reinforcement learning has been shown to be able to solve tasks without prior knowledge of thedynamics of the problems. In this thesis the applicability of reinforcement learning on the problem ofproduction planing is evaluated. Experiments are performed in order to reveal strengths and weak-nesses of the theory currently available. Reinforcement learning shows great potential but currentlyon
