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Sökning: LAR1:umu > Tidskriftsartikel

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  • Aaghabali, M., et al. (författare)
  • Upper bounds on the number of perfect matchings and directed 2-factors in graphs with given number of vertices and edges
  • 2015
  • Ingår i: European journal of combinatorics (Print). - : Elsevier BV. - 0195-6698 .- 1095-9971. ; 45, s. 132-144
  • Tidskriftsartikel (refereegranskat)abstract
    • We give an upper bound on the number of perfect matchings in simple graphs with a given number of vertices and edges. We apply this result to give an upper bound on the number of 2-factors in a directed complete bipartite balanced graph on 2n vertices. The upper bound is sharp for even n. For odd n we state a conjecture on a sharp upper bound.
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  • Aalto, Sirpa, et al. (författare)
  • The Sami Representations Reflecting the Multi-Ethnic North of the Saga Literature
  • 2017
  • Ingår i: Journal of Northern Studies. - Umeå : Umeå University. - 1654-5915 .- 2004-4658. ; 11:2, s. 7-30
  • Tidskriftsartikel (refereegranskat)abstract
    • This article focuses on contextualizing the Sami (finnar) representations in Old Norse saga literature. The purpose is to show that the Sami representations reflect multi-layered Old Norse textual and oral traditions, and complex interaction between the Sami and the Norwegians in the Middle Ages. The stereotypes of the Sami tell us more about the society that created them than about real, historical events. We can be sure that behind them lie very mundane phenomena such as trade and marriages.The ultimate goal of the article is therefore to reveal the multi-ethnic North that provided the background for the saga sources, a North whose history is not as homogeneous as sources suggest and quite unlike the modified version which found its way into the histories of nation states. The literary conventions of sagas are not just imaginary tales—their use in various contexts can reveal something essential in otherwise schematic images or configurations. Even researchers of the sagas have certain personal conceptions of what the “real” lives of the Sami were like at the time, and how the sagas depict this. In fact, they participate in a continuum of saga literature that generates representations of the Sami in history.
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  • Aarseth, Espen, et al. (författare)
  • Scholars' open debate paper on the World Health Organization ICD-11 Gaming Disorder proposal
  • 2017
  • Ingår i: Journal of Behavioral Addictions. - : AKADEMIAI KIADO RT. - 2062-5871 .- 2063-5303. ; 6:3, s. 267-270
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • Concerns about problematic gaming behaviors deserve our full attention. However, we claim that it is far from clear that these problems can or should be attributed to a new disorder. The empirical basis for a Gaming Disorder proposal, such as in the new ICD-11, suffers from fundamental issues. Our main concerns are the low quality of the research base, the fact that the current operationalization leans too heavily on substance use and gambling criteria, and the lack of consensus on symptomatology and assessment of problematic gaming. The act of formalizing this disorder, even as a proposal, has negative medical, scientific, public-health, societal, and human rights fallout that should be considered. Of particular concern are moral panics around the harm of video gaming. They might result in premature application of diagnosis in the medical community and the treatment of abundant false-positive cases, especially for children and adolescents. Second, research will be locked into a confirmatory approach, rather than an exploration of the boundaries of normal versus pathological. Third, the healthy majority of gamers will be affected negatively. We expect that the premature inclusion of Gaming Disorder as a diagnosis in ICD-11 will cause significant stigma to the millions of children who play video games as a part of a normal, healthy life. At this point, suggesting formal diagnoses and categories is premature: the ICD-11 proposal for Gaming Disorder should be removed to avoid a waste of public health resources as well as to avoid causing harm to healthy video gamers around the world.
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  • Aarts, Clara, et al. (författare)
  • Breastfeeding patterns in relation to thumb sucking and pacifier use.
  • 1999
  • Ingår i: Pediatrics. - 1098-4275. ; 104:4, s. e50-
  • Tidskriftsartikel (refereegranskat)abstract
    • Objective:The primary aim was to assess, the association of the quantity and quality of dietary fat intake from 6 to 12 months of age and serum lipids at 12 months.Subjects/Methods:Three hundred healthy term Swedish infants were recruited in a longitudinal prospective study at the age of 6 months; 276 remained in the study at 12 months. Food records and anthropometric data were collected monthly from 6 to 12 months; serum lipids were analysed at 6 and 12 months.Results:Swedish infants had a total fat intake within the Nordic recommendations, but intake of polyunsaturated fatty acids (PUFA) was low (5.6 percent of total energy (E%)) and intake of saturated fatty acids (SAFA) was high (15.1 E%). Higher PUFA intake was associated with lower total serum cholesterol (TC, B=-0.13, P=0.003), lower low-density-lipoprotein cholesterol (LDL-C, B=-0.12, P=0.004) and apolipoprotein B (B=-0.03) (P=0.034) in girls but not in boys. When data from the present study were compared to data from similar studies in Finland and Iceland, it appears that the quality of the dietary fat has greater impact on serum lipid levels than the quantity of fat in the diet.Conclusions:Higher PUFA and lower SAFA intakes may reduce TC and LDL-C early in life, particularly in girls. Further, with respect to lowering serum lipid concentrations in early childhood it seems appropriate to set focus on fat quality rather than the quantity.Sponsorships:Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning (Formas), Swedish Research Council, Medicine, Stiftelsen Oskar Foundation, Sven Jerring Foundation, Samariten Foundation, Stiftelsen Goljes minne and Semper AB.European Journal of Clinical Nutrition advance online publication, 20 June 2007; doi:10.1038/sj.ejcn.1602824.
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  • Aas, Marit, et al. (författare)
  • Examining Norwegian and Swedish Leadership training programs in light of international research
  • 2016
  • Ingår i: Nordic Studies in Education. - Oslo : Universitetsforlaget. - 1891-5914 .- 1891-5949. ; 36:2, s. 173-187
  • Tidskriftsartikel (refereegranskat)abstract
    • This article examines and compares principal training programs in Sweden and Norway, the two Nordic countries with national leadership programs for already active school leaders. To investigate the knowledge base and design of the programs we draw on two research-derived tools about successful professional learning programs for school leaders. Based on the examinations, we suggest that the programs reflect international research both in terms of content and process factors. In addition, we identify topics and issues, such as balancing democratic participation with managerial decision-making, which can be characterized as making up a Nordic profile.
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