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The topic of fires in corners and along walls has been studied previously, however, two different studies conducted in 1987 and 2018 respectively, produced conflicting results regarding plume temperature for fires along walls, as well as hot gas layer temperature for both fires in corners and along walls. This thesis seeks to add data and clarification about fires in corners and along walls. T
Bumblebees, a pollinator, are haplodiploid with single-locus complementary sex determination (sl-CSD) and as a consequence can give rise to diploid males. Diploid males have previously been found to be associated with high costs and multiple severe effects. Mostly studied on Bombus terrestris, a common species, the frequency of diploid males have been suggested as a measure of inbreeding and there
The circulating fluidised bed boiler (CFB) consists of developing the combustion of a mass of fuel, in this case biomass, within a bed of particles in suspension, which have been fluidised by an ascending air current. Combustion occurs in a controlled manner throughout the entire furnace at temperatures around 850 ºC, which is lower than in conventional boilers, reducing NOx emissions. However, NO
Nowadays, due to the global climate change, it is extremely important to find alternative fuels to reduce the utilization of fossil fuels and the emission of air pollutants such as carbon dioxide (CO2), hydrocarbon pollutants, and soot. Ammonia (NH3) is a promising carbon free fuel candidate that can store and transport renewable hydrogen (H2) energy. Ammonia has several advantages over hydrogen i
There is still little consensus on whether trade promotes peace or not This thesis aims at investigating the relationship between economic interdependence and conflicts in post-Soviet countries, contributing to the empirical literature on the regional level. Using dyadic measures of trade and conflict, I investigate the relationship between interdependence and onset conflict, ongoing conflict, and
The objective of the degree project was to assess the average thermal transmittance and the climate impact of the façade. The studied prefabricated façade panels were the aluminium frame one, the insulated concrete sandwich and the wooden frame panel. The research approach consisted of five steps: the physical and thermal requirement of the panel was established; then the initial U-Value of each p
This paper explores how barriers and risks are perceived by different actors involved in Northvolt's establishment in Skellefteå, Sweden, through the Multi-Level Perspective (MLP) and risk perspective. The study employs a qualitative research design and utilizes document analysis and semi-structured interviews to collect data. The findings contribute to the existing risk framework by introduci
Diffuse large B cell lymphoma (DLBCL) and mantle cell lymphoma (MCL) are aggressive non-Hodgkin lymphomas often diagnosed at advanced stages in elderly patients. Current tools for patient stratification do not sufficiently identify patient groups resistant to treatment. The presence of CD11c+ cells has previously been associated with pro-inflammatory tumour-immune microenvironment (TIME), while CD
α-Galactosidases from Aspergillus nidulans (AglC) and Penicillium subrubescens (PsGal36-2527) are exo-acting enzymes that can be found in the Glycoside Hydrolase (GH) 36 phylogenetic cluster with eukaryotic α-galactosidases. In utilizing enzymes for industrial applications, finding enzymes with a broad range of substrate specificities and high catalytic efficiencies is quite challenging. It has be
This report details the development and evaluation of fibre-based primary packaging concepts for the growing ready-meals category, focusing on a concept packaging design project for Micvac AB. The research methodology employed the Double Diamond of Design Thinking as an innovation model. The project encompassed an assessment of the desirability, feasibility, and viability of fiber-based packaging.
The recent 2019 COVID pandemic elucidated the tremendous effects a viral outbreak can have on the societies of the world with almost 7 million cumulative deaths worldwide. It is therefore of high importance to prepare preventative measures to aid the handling of emerging viral threats before a new pandemic is realized. One of the more prevalent and rapidly spreading viruses today are the Dengue vi
The jet breakup and the potential occurrence of satellite droplets play a crucial role in the print quality of drop-on-demand (DOD) systems. This thesis focuses on developing a numerical model to simulate droplet formation utilizing the volume-of-fluid (VOF) method. A particular focus is on the occurrence of satellite droplets and how different fluid properties influence the jetting behaviour. The
The malaria parasite causes the deadly malaria disease that claims thousands of lives every year. While antimalarial drugs such as chloroquine and artemisinin exist, there is a continuous race to overcome the resistance developed by malaria parasites against drugs. Four new chromium complexes have been synthesized and characterized. The complexes contain quinoline structures with four different su
Recently, several academic studies have proposed a theoretical ‘producerist framework’ to address the lack of research and conceptual clarity on the economic dimension of national populism. Essentially, this framework refers to a narrative that pits the producers, understood as citizens that contribute to the nation’s economic wealth, against parasitic takers, who threaten the producers’ well-bein
The main purpose of this project has been to model one steam heated cylinder, which was taken as part of a drying section, moreover the design and structure of an existing process has been taken in consideration.
To develop this work ModelicaTM software has been used. Particular attention has been paid to reproduce the two time constants behavior of the dynamics in the pressure
Interlinked control loops with asynchronous sampling can give rise to a time varying time delay which varies irregularly. Here we examine ways to model these effects for an arbitary number of control loops, and to build up a probability density function, and current delay, before implementing a controller.
Modelling of an industrial control loop for concentration control using Omola, an object-oriented modelling language, is described. The major modelling effort has been made to make a complete nonlinear model of the pneumatic positioner-actuator of the control valve in the loop. A library of several friction models has also been developed. These models have been used to describe friction in the con
Sandvik Coromant is the market leader of producing tools for advanced metal cutting. The tools are produced in cemented carbide, however Sandvik Coromant does not produce tools for machining cemented carbide. The aim of the thesis was to perform cutting tests in cemented carbide with diamond tools to investigate if the binder content affected the machinability of the process. The wear tests were
High-throughput screening is one of the most extensively used methods for the identification of molecules of interest during early stages of drug development projects. It is however subject to many artifacts due to various mechanisms. Aggregation and redox cycling are examples of mechanisms of unspecific inhibition that make a large number of compounds appear as active in several high throughput s
