This paper investigates how typical frequency domain concepts such as circular polarization and axial ratio can be given a useful meaning in the time domain. The relationship between the linear polarizations of a circularly polarized time dependent signal is shown to be the Hilbert transform, and the instantaneous axial ratio can be computed from envelope functions, obtained from corresponding ana

It is commonly assumed that speech production is initiated and guided by clear pre-verbal intentions. These intentions are moreover supposed to function as a standard of accuracy against which actual performance can be measured. Alternative positions to such a centrally governed process have been offered, but very few empirical attempts have been made to explore the issue. We aimed to remedy this

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Popular Abstract in Swedish Mörkerseendet är en mycket känslig nervfunktion och mycket känsligare för låg syrgastillförsel än högre mentala funktioner. Mörkerseendet är kraftigt reducerat hos patienter med två kliniskt sett så olika tillstånd som förträngd halspulsåder (carotisstenos) och "trögflytande blod" (polycytämi). Gemensamt för båda patientgrupperna är en under lång tid störd blodcirculatiPurpose: To study dark adaptation in patients with symptomatic carotid artery disease or polycythemia before and after treatment. This necessitated determinations of pupillary changes as such may influence the findings. To determine whether changes in the retinal blood flow in light and darkness occur in healthy humans. Methods: Repeated automatic dark adaptometry was recorded monocularly in 21 c

Shear and compaction bands represent two fundamental failure modes in sandstones. The identification of these features in both the natural outcrops and the laboratory scale yields useful insights into the mechanisms of localised deformation. Several conventional and advanced experimental full-field methods have been developed in order to shed light into the processes involved, as well as qualify a

The aim of this study was to investigate the correlations between epidemiological indices (objective) and self-perceived oral health (subjective) in adolescents at school level, and to study gender differences in epidemiological indices and in self-perceived oral health. The study comprised two sets of data from Skaraborg County, Sweden: 1. Self-reported questionnaires answered by adolescents at a

Stream ciphers like Snow 2.0 are very promising techniques for encryption in trusted hardware, but demand specialized IP cores to enhance conventional architectures. The paper describes the design of such a core that can be adapted to the system needs according to a ratio of throughput and effective slice usage of 3.2 to 3.5. The footprint is comparable with a commercial floating-point unit.

Phosphor thermometry is applied for the first time in a large-bore two-stroke diesel engine. The work proves the practicality of phosphor thermometry in large-bore engines. The experiments were conducted on the MAN 4T50ME-X marine research engine equipped with an optical cylinder head. By employing a thin surface coating of CdWO4 phosphor, cycle resolved temperature measurements of the cylinder wa

Ethanol can be produced from lignocellulose by first hydrolysing the material to sugars, and then fermenting the hydrolysate with the yeast Saccharomyces cerevisiae. Hydrolysis using dilute sulphuric acid has advantages over other methods, however, compounds which inhibit fermentation are generated during this kind of hydrolysis. The inhibitory effect of aliphatic acids, furans, and phenolic compo

Mångkulturalism är en svårgripbar term som figurerar som etikett på idéer som sinsemellan kan vara ganska olika. Jag ska försöka bringa lite ordning i diskussionen om mångkulturalism, specifikt i relation till mänskliga rättigheter, genom att göra en – alls inte uttömmande – inventering av hur begreppet mångkulturalism används i debatten, framför allt inom politisk teori. Personer som alla försvar

The Aids pandemic and structural adjustment policies (SAP) have had effects on lower income households in Zimbabwe which have been devastating and people have been required to adapt their livelihood strategies. Small towns meahnwhile are growing rapidly in Zimbabwe and mobility towards these towns may be connected with the changes being forged by SAP on the economic landscape. This study seeks to