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Physical bounds on the partial realized gain

An antenna identity, derived from the forward scattering sum rule, shows that the partial realized gain of an antenna is related to the polarizability of the antenna structure. The partial realized gain contains the mismatch, directivity, efficiency, and polarization properties of the antenna. The antenna identity expresses how the performance depends on the electrical size and shape of the antenn

Från alpromantik till hembygdsromantik. Natursynen i Sverige från 1885 till 1915, speglad i Svenska Turistföreningens årsskrifter och Nils Holgerssons underbara resa genom Sverige

The purpose of this dissertation is to analyse the changing views of nature from 1885 to 1915 as Sweden experienced possibly the greatest transformation in its history. An examination of the Swedish Touring Club's Annual Review serves to illustrate these changes. These reviews have under the slogan 'Know Your Country', been published since 1886. A parallel comparison can be traced through interpre

Phase Equilibria and Structures of Oppositely Charged Polymers and Surfactants in Water

Popular Abstract in Swedish Polymerer och tensider är två mycket vanliga molekylslag som vi ofta stöter på i vårt vardagliga liv. Polymerer är extremt långa kedjor sammansatta av tusentals repeterande enheter. De förekommer både som hårda material (t ex plast) och i lösning (t ex målarfärg). Det finns syntetiska polymerer, såsom nylon och polyeten, och det finns biologiska polymerer, t ex cellulosA new approach to the study of aqueous mixtures of oppositely charged polymers and surfactants has been introduced. Pure polyion-surfactant ion complex salts have been synthesized and used as the point of departure. The elimination of the simple ions reduces the number of components in the mixtures, thus greatly simplifying the system. By mixing the complex salt with either the polyelectrolyte or

The Swedish Model of Industrial Relations: Self-Regulation and Combined Centralisation-Decentralisation

The Swedish model of industrial relations is analyzed with respect to some closely related dimensions: collective agreements - legislation, cooperation - confrontation, self-regulation - state regulation and centralisation - decentralisation. Both the historical development and the present state of the model are discussed. In an analytical table the dimension self-regulation - state regulation is

Comparative aerodynamic performance of flapping flight in two bat species using time-resolved wake visualization.

Bats are unique among extant actively flying animals in having very flexible wings, controlled by multi-jointed fingers. This gives the potential for fine-tuned active control to optimize aerodynamic performance throughout the wingbeat and thus a more efficient flight. But how bat wing performance scales with size, morphology and ecology is not yet known. Here, we present time-resolved fluid wake

Marias medlidande: Ett bidrag till studiet av birgittinsk spiritualitet

The compassion felt by Mary for Christ when she was standing at the foot of the Cross is an important motif in late medieval piety. It becomes an object of liturgical celebration in the fifteenth century and sermons are preached on it. This paper treats the motif in some fifteenth century sermons from manuscripts once owned by the Birgittine abbey of Vadstena, Sweden. The treatment of the motif in

On the nature of the qualitative research approach

The qualitative approach to research is seen as a socially constructed heterogeneous tradition of ideas. It is difficult to argue for the existence of some set of features which are common to all qualitative methods but not to other types of research methods. Furthermore, it is unfortunate to see the qualitative approach as inherently in contrast to the quantitative approach. In fact, it may be fr