Samhällets ökade miljömedvetenhet kopplas ofta i byggbranschen till energieffektivitet. För en större skillnad i energianvändning kopplade till bostäder behöver mer fokus ligga på de redan existerade bostäderna och inte bara nyproduktion. En byggnads energianvändning innefattar bland annat brukarvanor. Det saknas objektiva mätningar gällande brukares vädringsvanor och hur de påverkar energianvändnSociety's increased environmental awareness is often linked in the construction industry to energy efficiency. A building's energy use includes, among other things, user habits. There’s a lack of objective measurement regarding users' ventilation habits and how they affect energy use. The purpose of this report is to find out how users in exhaust-ventilated apartment building from the

The combination of item non response and cluster analysis is a field which has not been explored to its full extent. This study aims to investigate which consequences a data set with missing values has on the algorithm of cluster analysis and which model for imputation should be suggested in order to minimize standard error and the optimal number of clusters. Basing our research on principal compo

The aim of the thesis is to evaluate solutions to the class imbalance problem using real world data sets with varying degrees of class imbalance. The analysis is limited to binary classification. Three large data sets relating to credit card fraud, vehicle insurance and heart disease are used for the analysis. Several methods are compared and evaluated. Logistic regression, SVC and decision trees

Cobalt-containing nanoparticles have been prepared via thermal decomposition of cobalt acetate on the surface of poly(tetrafluoroethylene) (PTFE) microgranules forming a fluidized bed over the surface of hot mineral oil. Using transmission electron microscopy, the average size of the cobalt-containing nanoparticles has been determined to be 3.6 nm. The composition and structure of the nanoparticle

We utilize data from the Survey of Health, Ageing and Retirement in Europe (SHARE) 1 to investigate the impact of retirement on mental health in a multi-country setting. To deal with endogeneity in retirement behaviour, we employ an individual-fixed effects IV strategy where pension eligibility thresholds at which financial incentives to retire are exploited to predict retirement behaviour. The co

Due to the rise in the demand for semi-dairy beverages (vegetable fat in a de-fatted dairy matrix) as well as for fully plant-based formulations, there is a growing interest in better understanding how emulsification processes are influenced by raw material choices. Semi-dairy beverages, for example, utilize a wide variety of vegetable oils in their formulation. This contribution combines traditio

Mechanical behavior of meniscus can be modeled using constitutive material models of varying complexity, such as isotropic elastic or fibril reinforced poroelastic (FRPE). However, the FRPE material is complex to implement, computationally demanding in 3D geometries, and simulation is time-consuming. Hence, we aimed to quantify the most suitable and efficient constitutive model of meniscus for sim

System level synthesis is a promising approach that formulates structured optimal controller synthesis problems as convex problems. This work solves the distributed linear-quadratic regulator problem under communication constraints directly in infinite-dimensional space, without the finite-impulse response relaxation common in related work. Our method can also be used to construct optimal distribu

Peak to average power (PAPR) reduction of OFDM signals is critical in order to improve power amplifier (PA) efficiency in base stations. For massive MIMO, the complexity of these methods can become a real bottleneck in implementing low power digital signal processing chains. In this work, we consider an antenna reservation technique, which uses a low complexity clipping method to reduce signal pea

We developed a process for enzyme-linked immunosorbent assay on a glass microchip via the use of a thin-layered microfluidic channel. This channel possesses a high aspect ratio (width/depth ∼200) and has an antibody layer immobilized directly on the channel surface. A depth of several microns and an excessive width and length (mm scale) of the channel provide a large-volume capacity (102 nL) and m

TOI-216 hosts a pair of warm, large exoplanets discovered by the TESS mission. These planets were found to be in or near the 2:1 resonance, and both of them exhibit transit timing variations (TTVs). Precise characterization of the planets’ masses and radii, orbital properties, and resonant behavior can test theories for the origins of planets orbiting close to their stars. Previous characterizatio