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A method to compute antenna Q using an electromagnetic simulation at a single frequency is described. This method can easily be integrated into global optimization algorithms. In this way the optimization time of some antenna parameters, e.g., bandwidth, may be significantly reduced. The method is validated by direct comparison with the physical bound of the analyzed structure. Numerical examples
Analys av hur den franska revolutionens ursprung skildras hos olika författare
Forskningsrapporten är en studie av den förhandlande subnationella regionen med Skåne som empirisk fallstudie. Den utforskar betydelsen av förhandlingsmakt i regionaliseringsprocessen genom att göra tre antaganden: 1) Förhandlingar utgör ett centralt inslag i västeuropeisk regionalisering. 2) Förhållandet mellan stat och region kan beskrivas som ett asymmetriskt beroende, liknande det mellan stark
Shape models and the automatic building of such models have proven over the last decades to be powerful tools in image segmentation and analysis. This thesis makes contributions to this field. The segmentation algorithm typically uses an objective function summing up contributions from each sample point. In this thesis this is replaced by the approximation of a surface integral which improves the
Here we present results from a field experiment in a sub-arctic wetland near Abisko, northern Sweden, where the permafrost is currently disintegrating with significant vegetation changes as a result. During one growing season we investigated the fluxes of CO2 and CH4 and how they were affected by ecosystem properties, i.e., composition of species that are currently expanding in the area (Carex rot
The effective refractive-index as a function of vacuum wavelength is approximated by Lagrange interpolation polynomials. The root-mean-square value of the chromatic dispersion is then calculated analytically. It is demonstrated that use of fourth degree polynomials is far more efficient than use of second degree polynomials. The rms-value of the chromatic dispersion over the wavelength range [1.25
Background: Presumed effects of global warming on occupational heat stress aggravate conditions in many parts of the world, in particular in developing countries. In order to assess and evaluate conditions, heat stress must be described correctly and measured correctly. Objective: Assessment of heat stress using internationally recognized methods. Design: Two such methods are wet bulb globe temper
Både högern och vänstern har fallit offer för USA:s skickliga propagandakrig för att rättfärdiga en militär insats mot Libyen. Medan Vita Husets hemsida skriver i ett uttalande daterat 24 mars att USA ”förkastar våld under alla omständigheter” bara en vecka efter amerikanska drönare dödade 41 civila i Pakistan. Ändå lyckades USA, UK och Frankrike övertyga omvärlden att en militärinsats i Libyen sk
Assistive products may elicit unpleasant feelings within both the actual user and persons around. By analysing two complementary studies, this paper tries to illuminate which unpleasant feelings may be elicited. In study A industrial design students evaluated assistive products. In study B young persons with disabilities were interviewed about their everyday experiences. Negative statements by par
