Search results

Det finns ett växande behov av miljövänliga sätt att transportera sig och därför har elcykeln slagit stort i Sverige. Elcykeln används ofta som transportmedel till och från jobbet men har potential att användas i andra sammanhang också. Miljöpåverkan orsakad av transport under semesterresor har uppmärksammats på senare tid. Samtidigt ökar efterfrågan på soft adventures, bekväma och tillrättalagda There is a growing demand for environmentally friendly ways of transportation, and therefore the electric bicycle has been booming in Sweden. The electric bicycle is often used as means of transportation to and from work, but has potential to be used in other situations as well. The environmental impact caused by transportation during holidays has recently gained attention. At the same time the de

Due to its high vulnerability, permafrost is one of the key features studied in the field of climate change impacts. Permafrost is widespread in the Arctic region. The majority of the area underlain by permafrost is however difficult to access for in-situ monitoring and it is difficult to get an overview of the current state of permafrost in many areas. Permafrost modeling provides a solution whi

This thesis covers established procedures for the successful and attempted immobilization of lipases and phospholipases to various hydrophobic support materials, utilizing a rotating bed reactor, magnetic stirrer and tube-rotator. The design of a robust platform was established with great instrumental knowledge and proper conditioning for the creation of efficient immobilizations and activity assa

Highly glazed spaces are continuously increasing in popularity due to architectural attractiveness. However, increased use of glass often jeopardizes thermal comfort in several ways and problem of overheating is one of them. A way to face this problem is to appropriately use solar control mechanisms. However, a proper selection of solar control mechanisms from an early design stage is a complex ta

The main objective of this thesis is to present the article "An estimate of the condition number of a matrix", written by Cline et.al., which describes an algorithm for obtaining a reliable order of magnitude estimate of the condition number of a matrix in O(n^2) operations. In addition, the thesis introduces an iterative process for estimating the condition number in the 2-norm with arb

This study focuses on the human factors associated with elevator use during evacuation in residential buildings. An online survey is conducted to explore seven factors that may influence people’s choice of elevators in China and the United Kingdom, including floor height, waiting time for elevators, crowd density in front of elevators, mobility limitations, instructions, fire location concerning p

A thermochromic ink is defined as an ink that exhibits colour changes depending on temperature. Thermochromic inks used in printing generally consist of an encapsulated three part system which includes a dye that changes colour, a compound that acts as a colour developer and a solvent. Due to the properties of the dye, the inks are always colourless above a certain temperature and coloured below a

Wildfires pose a serious threat to communities in different parts of the world, mostly in regions with a warmer climate. Due to the increased urbanization next to the forest and climate change, they are currently an issue to be addressed also in other parts of the world. The purpose of this thesis is to provide a first step in the direction of creating a holistic Vulnerability Assessment Method (V

BvHb1.2 is a sugar beet haemoglobin (Hb) and a good candidate to be used as an artificial oxygen carrier (AOC). 19 mutants of BvHb1.2 were produced with random mutagenesis and expressed in BL-21 E. coli. The Hb content in whole cells was determined by using a refraction index modifier by mixing cell suspensions with 35% BSA. The two mutants (4 and 15) with the highest Hb production were purified u

Changes in the agricultural landscape have caused declines in bumblebee species richness and abundance. Semi-natural grasslands are key habitats for bumblebees in agricultural landscapes, and therefore it is important to understand which habitat characteristics promote species-rich bumblebee assemblages in these habitats. In this study, I investigate the importance of trees within semi-natural gra

In this master thesis we consider some phenomenological aspects of two-Higgs-doublet models, both elementary and composite ones. The emphasis is on calculating and understanding first order phase transitions in such models, constrained to be in agreement with existing collider data on the Higgs sector. We also consider the contribution to the gravitational wave background of the universe that woul

LDMX is a fixed target experiment designed to search for light dark matter. The experiment will search for dark matter signatures using missing momentum and energy in events with electrons scattering in the target. Part of the experimental setup in this search is a high granularity electromagnetic calorimeter to accurately measure the energies of recoil electrons. In this thesis artificial neura

The routing of a delivery fleet is a classical optimization problem, known as the vehicle routing problem (VRP), which can heavily impact the quality of a logistic distribution process. Historically, the VRP formulation has mainly included internal combustion engine vehicles (ICEVs). However, due to their reduced environmental impact, the inclusion of electric vehicles (EVs) has become more popula

Procedural generation as a concept is as old as computer graphics. It is usually defined as a method for creating data algorithmically as opposed to manually. Work in this area often revolves around noise functions and large degrees of randomness, which works well for chaotic structures and for generating natural environments, but it does not always suit more sophisticated and coherent environment

Existing models which describe crowd movement are running out of time and are failing to take the change of people’s characteristics into account. The purpose of this study is to determine the “state-of- the-art” regarding the research within the field of crowd movement and identify parameters that influence crowd movement. To do this, a scoping review was conducted and the articles that were foun

In this work, we intend to employ nanowires for the realisation of an artificial neuron which can be used to design a neural network that will guide the new generation of non-von Neumann architectures such as Neuromorphic Computing. Possible applications are strongly related to Neuromorphic architectures and artificial intelligence, such as high-performance computers, robotics hardware and autonom

The aim of this project is to design a solution to a payment system for people that have a diagnosis of intellectual disorder. This target group has problems with today’s payment system because it becomes successively more digital. With the digital solutions will the target group be excluded. I have been thinking of the question “What would happen if cash was removed as a payment system?”. I have

This thesis focuses on the techniques involved in analysing the substructure of products resulting from the decay of new particles. These particles are postulated to exist in models used to describe undetectable matter whose influence can be observed within the cosmos. The models are termed 'Dark Sector models' and they attempt to describe Dark Matter; theorised to exist and account for ab