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Portfolio optimization involves a tradeoff between maximizing expected returnand 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 imPortfolio 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 aim of this article is to study how selected variables influence delays in train traffic. Data has been collected on train movements, timetables, weather and capacity utilization on a highly utilized single-track railway line in southern Sweden during 2014. Based on this dataset, we have analysed how different factors affect delays in passenger traffic. We measure delays in a novel way, as dev

https://biologi.blogg.lu.se/agenda-for-the-fun-meeting-19-3-26/ - 2026-07-16

Platelets express Toll-like receptor 4 (TLR4), and this has been shown to be responsible for the thrombocytopenia induced by lipopolysaccharide (LPS) administration in vivo. We studied the role of LPS in mediating platelet phagocytosis by THP-1 cells in vitro by flow cytometry. Opsonization of platelets with an IgG monoclonal (W6/32) antibody or with IgG autoantibody-positive sera from patients wi

This article compares and contrasts male immigrant labor market experiences in Sweden and Denmark during the period 1985-1995. Using register-based panel data sets from Sweden and Denmark, a picture of the employment assimilation process of immigrants from Norway, Poland, and Turkey is presented. The comparative approach shows that immigrants in Sweden and Denmark experienced similar declines in e

The aim with this study was to investigate the senses of the lexemes /assassinated/, /killed/, and /murdered/ in 21st century American and British newspaper discourse, which was done with the method of corpus-driven Cognitive Linguistics. The main research questions dealt with how the combination of grammatical and contextual features of the articles frame patients and agents of the verbs. A focus

Until recently studies regarding the pathological aspects of refugee experiences have led the psychology field of forced migration, giving little space to positive factors like the resilience and well-being of individuals faced with these adversities. This doctoral thesis emphasizes good health rather than disease and aims at deepening the understanding of resilience and health as opposed to the d