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Colonization consists of two parts, a dispersal phase followed by establishment and reproduction at a new site. Dispersal behaviour influences survival and the access to resources and mates of individuals and is thus closely linked to an organism's fitness. The dispersal ability of two collembolan species, Protaphorura armata and Folsomia fimentaria, was determined in a laboratory experiment. The

Success of design projects depends on their quality from a technical and economic point of view and on the quality of their implementation and use. This paper discusses a computer aided planning (CAP) technique and its applicability and quality in both these respects. One version of the CAP-technique is developed for planning of industrial working environments and another version for planning of r

This thesis is based on three different projects: 1) the epitaxial growth of nanowires using chemical beam epitaxy, 2) the study of electron transport through quantum dots and multiple quantum dots in nanowires at low temperature, and 3) the development of wrap gated nanowire field effect transistors. In the first part, a method of studying the diffusion of the source material on the substrate su

Popular Abstract in Swedish Avhandlingen bygger på närläsningar av två av John Cowper Powys främsta romaner, A Glastonbury Romance (1932) och Porius (1951). Ett av dess mål är att påvisa hur en dialogisk läsning av Powys - dvs. en förståelse av samspelet och växlingarna mellan olika röster, tonfall, stilarter och genrer, faktorer som tillsammans bygger upp romanens språk - kan bidragThis study is based on dialogic readings of two of John Cowper Powys´s major novels, A Glastonbury Romance and Porius. The aim of this thesis is to demonstrate the interrelationship in the examined texts between the chain of narrative displacements and the frequent changes of voice and genre. Powys´s cornucopian writing with its wide employment of characteristics from various genres

Responses are typically faster and more accurate when both auditory and visual modalities are stimulated than when only one is. This bimodal advantage is generally attributed to a speeding of responding on bimodal trials, relative to unimodal trials. It remains possible that this effect might be due to a performance decrement on unimodal ones. To investigate this, two levels of auditory and visual

Popular Abstract in Swedish Studier av enstaka makromolekyler gör det möjligt att få insikt i och karakterisera viktiga biologiska processer. DNA, livets molekyl, är av särskilt intresse här. I denna avhandling användar vi metoder från statistisk fysik för att studera olika aspekter av DNA i nanokanaler och dess smältegenskaper. DNA-smältning är inte bara relevant för förståelsen av denna molekylsInvestigation of single macromolecules makes it possible to gain insight into and characterize important biological processes. DNA as the molecule of life is of special interest here. In this thesis tools from statistical physics are used to study different aspects of DNA confined to nanochannels, with particular regard to its denaturation properties. The study of DNA melting from the theoretical

This thesis presents new cryptanalysis results for several different stream cipher constructions. In addition, it also presents two new stream ciphers, both based on the same design principle. The first attack is a general attack targeting a nonlinear combiner. A new class of weak feedback polynomials for linear feedback shift registers is identified. By taking samples corresponding to the linear

Popular Abstract in Swedish Min forskning handlar om hur nedbrytningen av fett i fettceller regleras genom att fosfat tas av och sätts fast på olika proteiner inuti fettcellerna. För att man skall förstå hur fettnedbrytning hänger ihop med att fosfat reagerar med proteiner är det bra att veta något om hur fettcellernas ämnesomsättning regleras. Energilagring och fettomsättning Människokroppen laAdipose tissue is the main site of energy storage of the body and an important endocrine organ. Knowledge of the regulation of fat metabolism and the endocrine factors secreted by the adipocyte is crucial for the understanding of diseases such as obesity and diabetes. Insulin is the main antilipolytic hormone. Protein kinase B (PKB) and phosphodiesterase 3B (PDE3B) are both phosphorylated and acti

Liquid solubility measurements were performed by immersion of poly(octyl)methylsiloxane (POMS) in dilute aqueous solutions of homologous series of aliphatic esters and alcohols with compound specific concentrations of 20, 40, 80 and 120 ppm. Measurements were performed at 20 °C with both single- and multi-compound mixtures and linear sorption isotherms were obtained. By fitting experimentally dete

The stochastic behavior of FM-clicks in an unmodulated carrier plus noise is studied in terms of the conditional behavior of stationary Gaussian processes after level crossings. By a systematic use of thc Slepian model processes it is shown that the normalized shape of a positive FM-click approaches a certain rational function with simple random coefficients as the carrier-to-noise ratio tends to

Nuclear knockout reactions at relativistic energies provide a sensitive tool to determine the ground state properties of nuclei close to the drip line. Studies with kinematically complete measurements reveal the initial correlations in the reacting systems and yield spectroscopic information on the continuum states populated in the decay channel. The coincident data of charged fragments and neutro

Parkinson's disease is a devastating neurological condition that affects at least four million people. A striking feature of this disorder is the preferential loss of dopamine-producing neurons in the midbrain. Several aetiological triggers have been linked to Parkinson's disease, including genetic mutations and environmental toxins, but the pathway that leads to cell death is unknown. Recent deve

Some raw material characteristics were evaluated in three apple varieties cultivated in Southern Sweden, namely Kim, Mutsu and Jonagold. The study was undertaken to collect information in order to identify the effects of initial tissue properties on mass transport phenomena in general, and osmotic processing responses in particular. The texture profile analysis revealed cortex anisotropy of the th