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Ein aus dem 16. Jahrhundert stammendes, neuentdecktes Herbar des Berner Botanischen Institutes
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Characteristic kernels on Hilbert spaces, Banach spaces, and on sets of measures
No full textWe present new classes of positive definite kernels on non-standard spaces that are integrally strictly positive definite or characteristic. In particular, we discuss radial kernels on separable Hilbert spaces, and introduce broad classes of kernels on Banach spaces and on metric spaces of strong negative type. The general results are used to give explicit classes of kernels on separable Lp spaces and on sets of measures
’Brown and Proud!‘ Die Ästhetik von Chicano Rap im Südwesten der USA.
No full textChicano Rap entstand in den sp ten 1980er und frühen 1990er Jahren in Los Angeles und etablierte sich als musikalische Subkultur im Südwesten der USA – eine Region, die bis 1848 mexikanisches Territorium war und noch heute als „Greater Mexico“ oder „Aztlán“ bezeichnet wird, der mythische Heimatort der Azteken. Chicano Rap greift diese kulturell aufgeladene Symbolkraft auf lyrischer, musikalischer und visueller Ebene auf. Der vorliegende Beitrag stellt diese sthetik in einen regionalen und kulturhistorischen Kontext und geht der Frage nach, wie und warum Chicano Rap zu einem Phenomen des US-Südwestens werden konnte. Mit dem Fokus auf die multimediale Verflechtung von kulturellen Bedeutungsträgern stützt sich die Analyse auf eine kritische Quellenbetrachtung von ausgew hlten Songs, Plattencovern und Musikvideos, und wird mit ethnografischen Interviews mit Künstlern und Zeitzeugen unterfüttert
Short cycles of random permutations with cycle weights: Point processes approach
No full textWe study the asymptotic behavior of short cycles of random permutations with cycle weights. More specifically, on a specially constructed metric space whose elements encode all possible cycles, we consider a point process containing all information on cycles of a given random permutation on 1,…,n. The main result of the paper is the distributional convergence with respect to the vague topology of the above processes towards a Poisson point process as n→∞ for a wide range of cycle weights. As an application, we give several limit theorems for various statistics of cycles
Neglecting biodiversity baselines in longitudinal river connectivity restoration impacts priority setting.
No full textRiver habitats are fragmented by barriers which impede the movement and dispersal of aquatic organisms. Restoring habitat connectivity is a primary objective of nature conservation plans with multiple efforts to strategically restore connectivity at local, regional, and global scales. However, current approaches to prioritize connectivity restoration do not typically consider how barriers spatially fragment species' populations. Additionally, we lack knowledge on biodiversity baselines to predict which species would find suitable habitat after restoring connectivity. In this paper, we asked how neglecting these biodiversity baselines in river barrier removals impacts priority setting for conservation planning. We applied a novel modelling approach combining predictions of species distributions with network connectivity models to prioritize conservation actions in rivers of the Rhine-Aare system in Switzerland. Our results show that the high number and density of barriers has reduced structural and functional connectivity across representative catchments within the system. We show that fragmentation decreases habitat suitability for species and that using expected distributions as biodiversity baselines significantly affects priority settings for connectivity restorations compared to species-agnostic metrics based on river length. This indicates that priorities for barrier removals are ranked higher within the expected distributions of species to maximize functional connectivity while barriers in unsuitable regions are given lower importance scores. Our work highlights that the joint consideration of existing barriers and species past and current distributions are critical for restoration plans to ensure the recovery and persistence of riverine fish diversity
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