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We present an overview of how circuit models can be used for wave propaga- tion in stratified structures. Homogeneous slabs are modeled as transmission lines, and thin sheets between the slabs are modeled as lumped elements. It is seen that electric material properties contribute as shunt elements, and mag- netic material properties contribute as series elements. When the sheets have periodic patt
Abstract in Danish Sidste år i marts ramte en tredobbelt katastrofe Japan med jordskælv, flodbølge og atomulykke. Det økonomiske efterskælv fortsætter i Japan, og regningen løber op i billion-klassen hinsides milliardernes allerede svimlende nuller. Det kæmper den forgældede japanske stat med, der skylder mere end to gange sit bruttonationalprodukt. Premierminister Noda forsøger at hæve momsen som
SI Engine knock is caused by autoignition in the unburnt part of the mixture (end-gas) ahead of the propagating flame. Autoignition of the end-gas occurs when the temperature and pressure exceeds a critical limit when comparatively slow reactions - releasing moderate amounts of heat - transform into ignition and rapid heat release. In this paper the difference in the heat released in the end-gas
We characterize the expressive power of the modal mu-calculus on monotone neighborhood structures, in the style of the Janin-Walukiewicz theorem for the standard modal mu-calculus. For this purpose we consider a monadic second-order logic for monotone neighborhood structures. Our main result shows that the monotone modal mu-calculus corresponds exactly to the fragment of this second-order language
It is known that the minimum edge length convex partition MWCP of polygons with holes (an example of a PSLG) is NP-hard. Partitioning polygons with holes into the minimum number of convex polygons MNCP is also known to be NP-hard. We show that The MWCP and MNCP problem for general PSLGs where the sum of the hole vertices and re ex vertices inside the convex hull is sub-logarithmic can be solved in
I denna korta artikel reflekterar jag kring rekrytering till forskarutbildning och de faktorer som styr och influerar processen: (i) Det som ska ligga till grund för beredning och beslut enligt Högskoleförordningen och föreskrifter/beslut vid enskilda lärosäten, (ii) Målformuleringar för forskarutbildning enligt Högskolelagen, Högskoleförordningen och föreskrifter/beslut vid enskilda lärosäten, (i
