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Portfolio selection involves a trade-off between maximizing expected return and minimizing risk. In practice, useful formulations also include various costs and constraints that regularize the problem and reduce the risk due to estimation errors, resulting in solutions that depend on a number of hyperparameters. As the number of hyperparameters grows, selecting their value becomes increasingly imp
The statistical relation between ocean wave geometry and water particle movements can be formulated in the stochastic Gauss-Lagrange model. In this paper we use Slepian models to obtain detailed information of the sea surface elevation in the neighbourhood of local maxima in a Gaussian wave model and of the movements of the top particle of the waves. We present full conditional distributions of th
Popular Abstract in Swedish Stora framsteg har gjort det möjligt att, med dagens teknik, inte bara visualisera enskilda atomer, utan även utföra olika typer av operationer och manipulationer på atomskalan med stor precision rent experimentellt. Detta har möjliggjort tillverkning av komplexa nanostrukturer genom montering av komponenter av nanostorlek till större sammansatta system, vilket i sin tuNanowires constitute one of the fundamental building blocks in assembled nanodevices. Due to the high surface to volume ratio, the fraction of surface atoms is not negligible for nanosized elements. Because of the reduced coordination of surface atoms, the physical properties deviate from those of the bulk, which influences the overall physical properties of nanostructures. Consequently, this prov
Sociologiska inst i tut ionen Prefekt 2026-03-01 P 2026/P Diarienummer: P 2026/1626 Checklista för värdar för gästforskare och gästdoktorander Vi är glada för att ta emot gästforskare hos oss. För att det ska fungera bra både för gäster och oss på institutionen, har vi har tagit fram denna checklista för värdar. För dig som ska vara värd för en gästforskare gäller följande: Mellan 7 månader och 2
Online engagement with criminal cases is often interpreted in either punitive or crowdsourcing terms, but interactionist and ethnomethodological analyses can disclose other and more fundamental aspects. This chapter looks closely at a particular practice among posters on the Swedish platform Flashback: that of summing up the discussion ‘so far’. To sum up is a delicate and vulnerable act of rhetor
