Search for dissertations about: "diversity"
Showing result 21 - 25 of 1894 swedish dissertations containing the word diversity.
-
21. Utilizing Diversity and Performance Measures for Ensemble Creation
Abstract : An ensemble is a composite model, aggregating multiple base models into one predictive model. An ensemble prediction, consequently, is a function of all included base models. Both theory and a wealth of empirical studies have established that ensembles are generally more accurate than single predictive models. READ MORE
-
22. Optimization beyond a single submodular function : Submodular optimization for ranking, decision trees and diversity
Abstract : Submodular functions characterize mathematically the ubiquitous ``diminishing-returns'’ property. They are widely used to describe core subjects in numerous applications, including economic utility, redundancy in information, spread of influence in social networks, and more. READ MORE
-
23. Immigration, Social Cohesion, and the Welfare State : Studies on Ethnic Diversity in Germany and Sweden
Abstract : Can social cohesion and solidarity persist in the face of large-scale migration? One particularly contentious hypothesis states that native majorities will be unwilling to support the provision of government-funded welfare to those whom they do not consider to be part of their own sociocultural ingroup, especially when sociocultural or ethnic otherness and socioeconomic disadvantage overlap. Consequently, majorities’ willingness to accept disadvantaged immigrant groups as legitimate and trusted members of the welfare community is central to the social cohesion of societies diversifying through migration. READ MORE
-
24. Phylogeny, diversity and toxin production related to cyanobacterial symbioses
Abstract : Phylogeny and morphology were examined for the cyanobionts from the water fern Azolla and the cyanobacterial genus Nostoc originating from symbioses with different host plants (genera Gunnera, Cycas, Dioon, Encephalarthos, Macrozamia, and Anthoceros), the lichen genus Pannaria, and free-living Nostoc isolates from different habitats. Nostoc isolates of Pannaria formed a closely related group, but, in general, no monophyletic nature was attributed to the genus Nostoc, in contrast to the cyanobionts from Azolla which were contained in a unique monophyletic group. READ MORE
-
25. Determinants of genomic diversity in the collared flycatcher (Ficedula albicollis)
Abstract : Individuals vary from each other in their genetic content. Genetic diversity is at the core of the evolutionary theory. Rooted in a solid theoretical framework developed as early as the 1930s, current empirical observations of genomic diversity became possible due to technological advances. READ MORE