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Det pågår diskussioner huruvida aktivt förvaltade fonder lyckas generera en bättre avkastning än marknaden. Ett argument för att investera i en aktivt förvaltad fond är att fondförvaltaren aktivt handlar värdepapper i syfte att uppnå hög avkastning. De här fonderna har ofta en högre avgift vilket används som motargument för att investera i den typen av fonder. Kritiker anser att en indexfond ger investerare en högre nytta eftersom de har lägre avgifter och att aktiv handel inte leder till större avkastning.  Många studier har gjorts på ämnet och den allmänna uppfattningen är att aktivt förvaltade fonder kan ge bättre avkastning än index över tid. Få studier kan dock bekräfta att det är fondförvaltarens bedrift. Fondprestation mäts enligt prestationsmåtten, Jensens Alfa, Sharpekvot och Treynorkvot. Slutsatsen liknar majoriteten av studier. Det är svårt att bekräfta hypotesen att det är fondförvaltarens skicklighet som ligger till grund till en bra fondprestation. Troligtvis beror större delen av en fonds prestation på makroekonomiska faktorer och börspsykologi. / Discussions are ongoing as to whether actively managed funds succeed in generating a better return than the market. One argument for investing in an actively managed fund is that the fund manager actively trades securities in order to achieve a high return. These funds often have a higher fee, which is used as a counter-argument to invest in this type of fund. Critics believe that an index fund provides investors with a higher benefit because they have lower fees and that active trading does not lead to greater returns.  Many studies have been done on the subject and the general perception is that actively managed funds can provide better returns than indices over time. Few studies can, however, confirm that this is the fund manager's achievement. Fund performance is measured according to performance measures such as Jensen's Alpha, Sharpe ratio and Treynor ratio. The conclusion of the study is similar to the majority of studies. It is difficult to confirm the hypothesis that it is the fund manager's skill that is the basis for a good fund performance. Most of a fund's performance probably depends on macroeconomic factors and stock market psychology.

Tato diplomová práce se zabývá návrhem a implementací rozšíření pro UnifiedPush Server, které serveru umožní přistupovat k nerelační databázi MongoDB a využívá potenciál horiznotální škálovatelnosti neralačních databází. Součástí práce je i návrh výkonnostních testů a porovnání výkonu při behu na jednom a vícero uzlích, návrh migračního scénáře z MySQL na MongoDB, identifikace úzkých míst. Aplikace je implementována v jazyce Java a využívá Java Persistence API pro přístup k databázím. Pro přístup k nerelačním databázím používá implementaci standardu JPA Hibernate OGM.

Dans un contexte où des quantités toujours plus colossales de données sont disponibles,extraire des informations significatives et non triviales devient toujours plus difficile. Afin d’améliorer la classification, régression, ou encore l’analyse exploratoire de données, l’approche fournie par l’analyse topologique de données (TDA) est de rechercher la présence de formes dans le jeu de données.Dans cette thèse nous étudions les propriétés des modules de persistance multidimensionnelle dans le but d’obtenir une meilleure compréhension des sommandes et décompositions de ces derniers. Nous introduisons un foncteur qui plonge la catégorie des représentations de carquois dont le graphe est un arbre enraciné dans la catégorie des modules de persistance indexé sur ℝ². Nous enrichissons la structure de module de persistance provenant de l’application du foncteur cohomologie à une filtration en une structure d’algèbre de persistance.Enfin, nous généralisons l’approche de Crawley Beovey à la multipersistance et identifions une classe de modules de persistance indexé sur ℝ² qui possède des descripteurs simples et analogues au théorème de décomposition existant en persistance1-dimensionnelle. / In a context where huge amounts of data are available, extracting meaningful and non trivial information is getting harder. In order to improve the tasks of classification, regression, or exploratory analysis, the approach provided by topological data analysisis to look for the presence of shapes in data set.In this thesis, we investigate the properties of multidimensional persistence modules in order to obtain a better understanding of the summands and decompositions of such modules. We introduce a functor that embeds the representations category of any quiver whose graph is a rooted tree into the category of ℝ²-indexed persistence modules. We also enrich the structure of persistence module arising from the cohomology of a filtration to a structure of persistence algebra.Finally, we generalize the approach of Crawley Beovey to multipersistence and identify a class of persistencemodules indexed on ℝ² which have simple descriptor and an analog of the decomposition theorem available in one dimensional persistence.

abstract: Concert band classes have been part of the schooling landscape in Canada and the United States since the early 1900’s. Nevertheless, the context in which concert band classes have been offered recently has undergone a dramatic change. Typically, concert band classes have been offered as an elective course in schools, but more recently, concert band classes in some school settings have been required, especially at the beginning level. Because of the required band class context, it can no longer be assumed students in such band classes have the same music making goals exhibited by earlier generations of students. Persistence, resilience, engagement and musical self-efficacy have been affected when choice was no longer afforded. This study was conducted to examine how goal setting strategies influenced student persistence, resilience, engagement, and musical self-efficacy within a required beginning concert band class. Framed by Bandura’s Self-Efficacy Theory, Bronfenbrenner’s Ecological Systems Theory, and Tinto’s research on persistence, a goal setting intervention was devised and offered to students taking a required grade 6 beginning band classes at an independent school in Ontario. Using a concurrent mixed method framework, quantitative and qualitative data were collected. Results from the quantitative data indicated no changes in the outcome measures. By comparison, qualitative data indicated persistence, resilience, engagement, and musical self-efficacy were influenced when using the goal setting tools. From students’ perspectives, musical self-efficacy and personal self-efficacy were realized through grade attainment, music notation fluency, rhythmic accuracy goals established on students’ weekly goal charts, and goal setting mind maps. Persistence and resilience were influenced as students overcame physical challenges through scaffolding their practice efforts by creating individualized practice regimens. Engagement was influenced through the goal setting intervention as students set goals such as performing for others—be it peers, family, or their teachers. In terms of future research and practice, cycles of action research would include expanding the goal setting intervention to include creating differentiated music making experiences alongside the traditional concert band genre, based upon principles drawn from a community music making contexts—specifically those involving collaborative music making like those experienced in Samba band ensembles. Recommendations for such experiences were shared. / Dissertation/Thesis / Doctoral Dissertation Leadership and Innovation 2019

MGS / Institute for Gender and Youth Studies / ‘Gonyalelwa lapa’ is a form of a marriage whereby a family marries a woman to a deceased son who passed on without having biological children, for the purpose of restoring or reviving the deceased’s name. The woman is married with her existing children, or to bear children who will take the surname of the deceased man. Women find it difficult to leave such marriages for the fear of losing their children whom they signed off by accepting to be married under this type of marriage. This study employs the feminist standpoint methodological approach in order to explore experiences of women who are married for ‘lapa’. The study purposefully selected a sample of 8 women who are married under ‘Gonyalelwa lapa’ as well as 4 key informants. Findings demonstrate that women marry for ‘lapa’ mainly for economic reasons, to escape stigmatization, for the acquisition of the marital surname, which is tied to being acknowledged, respected and recognized by the community. Nevertheless, these women face multidimensional challenges within their in-laws’ households: they receive no support from the inlaws; their girl-children suffer discrimination based on ‘sex-preference’, boys are given more value on the basis that a boy will be able to perpetuate a deceased man’s name. Most women married under this type of marriage suffer from emotional and economic abuse at the hands of their in-laws. The study reveals that these challenges are attributed to lack of physical presence of the husband in the family. The study recommends that a large scale study be conducted on this or related topic, to build knowledge and create an awareness of such a marriage as to facilitate its inclusion in Customary Marriage Act.

Title: Linear semiflexible polyelectrolytes in solutions Author: Petra Bačová Department: Faculty of Science, Charles University in Prague Supervisor: Doc. Ing. Zuzana Limpouchová, CSc. Supervisor's e-mail address: zl@vivien.natur.cuni.cz Consultant: Mgr. Peter Košovan, PhD. Abstract: In this thesis I used the Molecular dynamics simulations for study of charged polymers (polyelectrolytes) and their behaviour in solutions. Wide range of polyelectrolytes are se- miflexible and in contrast to neutral polymers it is possible to influence their stiffness by changing the properties of solution as for example ionic strength. The chain flexibility may be characterized by the persistence length. Thesis explains how to express the persistence length from orientational correlation function which shows the double exponential decay. Two contributions to chain stiffness are discussed and the interest is concentrated around electrostatic persistence length which seems to be scale dependent. An effect of added salt on the chain conformation is studied. Salt is treated implicitly within the Debye-Hückel approximation. The results are confronted with OSF theory and the conclusions of vari- ational calculations of Maghi and Netz. The presented thesis describes the conformational behaviour of polyelectrolytes in salty solutions,...

Staphylococcus aureus is a opportunistic pathogen that can cause severe and chronic infections. The reason of the infections relapse is often the persistence. It is about adapting to stressful conditions by inducing a dormant state, which would allow bacteria to survive exposure to antibiotics and grow again after their elimination. Bacteria that persist in the patient acquire various adaptive mutations, which are transmited creating subpopulations that have a better ability to persist. The aim of this diploma thesis was to compare individual methods of persistent study that could be used in clinical practice in the future, and at the same time to try a closer molecular characterization of the persistent state with using methods for calculating gene expression. I had chronological isolates of Staphylococcus aureus at my disposal, the initial one being the primoisolate, an isolate taken at the diagnostics of cystic fibrosis before the start of antibiotic treatment. Another was taken at a distance of three-quarters of a year and the last with a half-year interval from the previous one. Following whole genome sequencing, genes in which adaptive mutations occurred were identified. The first method determines the degree of persistence by calculating CFU (Colony Forming Units) after antibiotic treatment....

Background. Research suggests that low-grade psychotic experiences in the general population are a common but transitory developmental phenomenon. Using two independent general population samples, the hypothesis was examined that common, non-clinical developmental expression of psychosis may become abnormally persistent when synergistically combined with developmental exposures that may impact on behavioural and neurotransmitter sensitization such as cannabis, trauma and urbanicity. Method. The amount of synergism was estimated from the additive statistical interaction between baseline cannabis use, childhood trauma and urbanicity on the one hand, and baseline psychotic experiences on the other, in predicting 3-year follow-up psychotic experiences, using data from two large, longitudinal, random population samples from the Netherlands [The Netherlands Mental Health Survey and Incidence Study (NEMESIS)] and Germany [The Early Developmental Stages of Psychopathology (EDSP) study]. Results. The 3-year persistence rates of psychotic experiences were low at 26% in NEMESIS and 31% in EDSP. However, persistence rates were progressively higher with greater baseline number of environmental exposures in predicting follow-up psychotic experiences (χ2=6·9, df=1, p=0·009 in NEMESIS and χ2=4·2, df=1, p=0·04 in EDSP). Between 21% and 83% (NEMESIS) and 29% and 51% (EDSP) of the subjects exposed to both environmental exposures and psychotic experiences at baseline had persistence of psychotic experiences at follow-up because of the synergistic action of the two factors. Conclusion. The findings suggest that environmental risks for psychosis act additively, and that the level of environmental risk combines synergistically with non-clinical developmental expression of psychosis to cause abnormal persistence and, eventually, need for care.