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The joint actions of animals in partnerships or social groups evolve under both natural selection from the wider environment and social selection imposed by other members of the pair or group. We used experimental evolution to investigate how jointly expressed actions evolve upon exposure to a new environmental challenge. Our work focused on the evolution of carrion nest preparation by pairs of bu
Driven by the increasing demands on data rate from applications, the wireless communication standard has for decades been evolving approximately at a pace of one generation per ten years. Following this trend, the ambitious plan to replace the current cellular mobile network standard (4G) with the next generation standard (5G) is going through the standardization phase and is getting close to its
This thesis is an extension to the previous work done at Department of EIT in investigating the complexity reduction of LDPC decoding using the stochastic approximation method to improve the energy efficiency of energy-limited applica- tions, such as in mobile phones. The research carried out in this thesis investigates the complexity and conver- gence results of adaptive performance control algorit
Museum Stobaeanum included a collection of artefacts, originally labeled ”artificialia”. It consisted primarily of ethnographic objects from Asia, North and South America, Russia, Siberia, Greenland and Lapland, but also Classical antiquities, Nordic antiques, curious European works of art, as well as scientific instruments and models. Museum Stobaeanum included a comparatively small collection of
https://www.historiskamuseet.lu.se/stobaeus-project/artefacts - 2026-06-25
We investigate the application of non-convex penalized least squares for parameter estimation in the Volterra model. Sparsity is promoted by introducing a weighted !q penalty on the parameters and efficient batch and time recursive algorithms are devised based on the cyclic coordinate descent approach. Numerical examples illustrate the improved performance of the proposed algorithms as compared th
In this paper, problems related to simulation model documentation and model exchange between users are discussed. Complex simulation models have gained popularity in the environmental field, but require extensive documentation to allow independent implementation. The existence of different simulation platforms puts high demands on the quality of the original documentation. Recent experiences from
Abstract Due to developments in the last decades in the field of protein production, new technologies for bio-separation have evolved. Especially in the field of affinity chromatography, the search for new ligands is of great interest. Besides the antibodies used as affinity ligands, synthetic ligands were introduced. Textile dyes were a first group to be introduced but despite their selectivity a
Popular Abstract in Swedish I takt med att vi översvämmas av kameror och bilder blir också tillämpningarna för automatiserad bildanalys allt större. Det kan handla om avancerade industrirobotar eller mobiltelefoner och syftet är allt från att rädda liv till att få en bra bild på barnbarnen. Den här avhandlingen fokuserar på två centrala problem inom fältet datorseende och bildanalys. Den första dThis thesis focuses on two problems in the field of computer vision and image analysis. The first part of the thesis deals with image localization. The goal is simply to answer the question: Where was this picture taken? To answer this two things are needed: A model of the world, or at least the relevant parts of the world, and a method for relating a new image to the model. The thesis presents ne
This Licentiate dissertation deals with windows and solar shading devices and how they could be designed and used to save energy for heating and cooling in buildings. Parametric studies using the dynamic energy simulation software ParaSol v 2.0 were performed for different windows and solar shading devices. One study showed that both the cooling load and the annual cooling demand could decreased
The computation of the Capon and the amplitude and phase estimation (APES) filters can be very time consuming. The burden lies not only in the inversion of the sample covariance matrix, but also in the matrix multiplications. In this paper, we propose an efficient algorithm for the computation of the above mentioned filters, using Cholesky factorization and fast Fourier transforms. Furthermore, we
Litteraturlista Bedömning och betygssättning Artiklar och böcker Carlgren, Ingrid., Forsberg, Eva., & Lindberg, Viveca. (2009). Perspektiv på den svenska skolans kunskapsdiskussion. (s. 11–39). Stockholms universitetsförlag. https://www.diva- portal.org/smash/get/diva2:371489/FULLTEXT01.pdf [ca 28 s.] Green, Jenny. (2018). Återkoppling för lärande och utveckling av undervisningen. Skolverket. http
BACKGROUND: The escalating global epidemic of obesity is of worldwide concern because of its association with several chronic diseases and premature mortality. Some subgroups seem to be more affected than others. The aim of this study was to examine whether the mean BMI (adjusted for age) and the prevalence of obesity (adjusted for all the explanatory variables) changed between 2000/01 and 2004/05
The characteristic off periods that develop over time in subjects with Parkinson's disease (PD) on chronic levodopa therapy are usually considered to be motor complications but more recently the important contribution of non-motor off and non-motor fluctuations has also been acknowledged. Early-morning off (EMO) periods in PD patients are known to be a cause of significant disability, in addition
