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This thesis was constructed between January 8:th and May 30:th in the year 2009 at Lund institute of technology. This will be the master’s thesis of the Master of Science programme in mechanical engineering at Lund institute of technology. Light weight designs are becoming more and more important in the world today. As composite materials are being improved via research, it is possible to repl
We discuss some of the problems involved in homogenization of a composite material built from ferromagnetic inclusions in a nonmagnetic background material. The small signal permeability for a ferromagnetic spherical particle is combined with a homogenization formula to give an effective permeability for the composite material. The composite material inherits the gyrotropic structure and resonant
This report presents theories and measurements of the mechanisms af heat transfer in fibrous materials (e.g. insulation of mineral wool type), and measurements of these mechanisms. The present work is part af a larger research program at the Division of Building Technology, Lund Institute of Technology, for investigating the behaviour of fibrous material as thermal insulation. A preliminary versio
In many applications, such as remote sensing or wave slamming on ships and offshore structures, it is important to have a good model for wave slope. Today, most models are based on the assumption that the sea surface is well described by a Gaussian random field. However, since the Gaussian model does not capture several important features of real ocean waves, e.g. the asymmetry of crests and troug
This project aims to determine the characteristics of a wireless communication channel in city-street-canyon scenarios. The channel of a typical city intersection is modeled with a ray tracer and measured with a channel sounder. Then, the results of both tools are compared in terms of the local scattering function. The channel sounder utilized for the project was initially developed by Rui Wang et
A study on guided waves in a. layered half-space with large velocity contrasts and a decreasing velocity with depth is presented. Multiple mode dispersion curves are calculated in the complex wave number domain, taking into consideration the attenuation caused by leakage into the underlying half-space. The excitability of the modes by a vertical point force on the surface is also calculated. Resul
In this paper we treat the solvability of a general problem of linear electromagnetics. More precisely, we study the propagation (in the time domain) of electromagnetic fields in a bianisotropic medium, which presents dispersion. This is modeled by linear constitutive relations containing convolution terms. So the problem is represented by an integrodifferential equation in some appropriate Hilber
High throughput in particle and molecular sorting schemes is an important performance indicator and can be realized through increased volumetric processing rates or increased concentrations. Here we investigate the effect of increased concentration of high-molecular weight DNA in micropillar arrays for deterministic lateral displacement (DLD). We find that the array imposes regular fluctuations in
This thesis aims to examine how university-educated members of Generation Z in Sweden explain their decision to delay parenthood. As declining fertility rates across the globe risk to strain the global economy, this topic has never been more relevant. Sweden and the Noridcs have served as examples on which other nations have based their fertility strategies, but as the region has seen a sudden, an
Flooding of coastal infrastructure due to rising sea levels and storm surges can be mitigated by coastal protection. The design of such infrastructure depends not only on the storm surge still-water level but also strongly on storm-wave characteristics. Therefore, numerical wave modelling is essential in the absence of wave observations. Fetch-limited seas with low moderate wave-energy climates ar
Denna studie genomfördes i Sverige med syftet att erbjuda ett nytt perspektiv på ämnet turnover och hur olika faktorer påverkar beslutet att säga upp sig från jobbet eller stanna kvar. Med detta syfte undersökte studien de sex faktorerna lön och förmåner, miljö, karriärmöjligheter, kollegiala aspekter, meningsfullhet och balans mellan arbete och privatliv, som har ansetts vara några av de mest infThis study was conducted in Sweden with the motivation to provide a new perspective on the topic of turnover, specifically how different factors may affect turnover decision making. With this aim, the study examined the six factors salary and benefits, environment, career opportunities, collegial aspects, meaningfulness, and work/life balance, that have been regarded as some of the most influentia
- A PhD Interview with Ervin Ascic How can cancer cells be turned against themselves? Ervin Ascic, a Ph.D. student at Lund University’s Lund Stem Cell Center, has spent his doctoral studies exploring the answer to this question. On September 3 at 15:00, he will publicly defend his thesis, which investigates a new approach to cancer immunotherapy: using gene therapy to reprogram tumor cells into im
https://www.stemcellcenter.lu.se/research-school-stem-cell-biology/phd-interview-ervin-ascic - 2026-07-19
We report a search for first generation scalar leptoquarks using 1.03 fb(-1) of proton-proton collisions data produced by the Large Hadron Collider at root s = 7 TeV and recorded by the ATLAS experiment. Leptoquarks are sought via their decay into an electron or neutrino and a quark, producing events with two oppositely charged electrons and at least two jets, or events with an electron, missing t
The results of a search for the production of second generation scalar leptoquarks are presented for final states consisting of either two muons and at least two jets or a muon plus missing transverse momentum and at least two jets. A total of 1.03 fb(-1) integrated luminosity of proton-proton collision data produced by the Large Hadron Collider at root s = 7 TeV and recorded by the ATLAS detector
A search for pair-produced third generation scalar leptoquarks is presented, using proton-proton collisions at root s = 7 TeV at the LHC. The data were recorded with the ATLAS detector and correspond to an integrated luminosity of 4.7 fb(-1). Each leptoquark is assumed to decay to a tau lepton and a b-quark with a branching fraction equal to 100%. No statistically significant excess above the Stan
