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We investigate the magnetic instabilities of the nondegenerate (s-band) and a degenerate (d-band) Hubbard model in two dimensions using many-body effects due to particle-particle diagrams and Hund’s rule local correlations. The density of states and the position of the Van Hove singularity change depending on the value of next-nearest-neighbor hopping t′. The Stoner parameter is strongly reduced i
These days more and more software is produced as product families. Products that have a lot in common, but all the same vary slightly in one or more aspects. Developing and maintaining these product families is a complex task. Software configuration management (SCM) can, in general, support the development and evolution of one single software product and to some degree also supports the concept of
Whatever their size and the ecosystem they live in, all organisms may disperse at some stage of their life cycle. Dispersal dynamics are to a varying extent dependent on organismal size, life history, ecological niche, survival capacities and phylogeny. Moves towards a synthesis in dispersal ecology have focused primarily on vertebrates and higher plants, yet recent studies suggest that the disper
This paper addresses the problem of distributed Kalman filtering, with focus on limiting the required communication bandwidth. By distributed we refer to a scenario when all nodes in the network desire an estimate of the full state of the observed system and there is no centralized computation center. Communication only takes place between neighbors and only a fixed number of times each sample. To
I have documented creativity workshops and collected ethnographic data for evaluation purpose through a method I call participatory scriptwriting. The main purpose with the method has been to reach an understanding of how the participants perceive their reality through synthesizing their impressions of the workshops in a short manuscript. When the workshop has ended they have acted according to th
This paper presents a joint clustering-and-tracking framework to identify time-variant cluster parametersfor geometry-based stochastic MIMO channel models.The method uses a Kalman filter for tracking and predicting cluster positions, a novel consistentinitial guess procedure that accounts for predicted cluster centroids, and the well-known KPower-Means algorithm for cluster identification.We teste
Artikeln bygger på en jämförande analys av Hemingways Och solen har sin gång och Mihël R Roskams film Bullhead. Enligt argumentationen använder båda dessa verk nötkreaturet - tjuren - för att problematisera manlig sexualitet, men också för att utvinna mänsklig dramatik genom att visa upp djurs lidande och död. Djuren blir på detta sätt medel för att tala om mänskliga problem, medan narrativet lämn
