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Träfflista för sökning "WFRF:(Ahnesjö Jonas) srt2:(2010-2014)"

Sökning: WFRF:(Ahnesjö Jonas) > (2010-2014)

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1.
  • Ahnesjö, Jonas, 1969-, et al. (författare)
  • Recreational fishing in an educational intervention context promotes awareness and knowledge about nature in schoolchildren
  • 2013
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
    • Outdoor activities may be intuitively associated with interest for nature and environmental concern. However, most scientific studies suggest that no such correlation exists. In this quantitative study we have used a questionnaire and explored the hypothesis that a one day educational intervention may be a successful tool in increasing environmental awareness, interest for nature and interest for recreational fishing. We present evidence suggesting that educational interventions in which young people are exposed to natural environments in a recreational fishing context have positive effects on interest for nature and recreational fishing, knowledge about nature and environmental awareness. Our findings also reveal that frequency of nature visits does not correlate with self estimated interest for nature.  We also show that the observed effects of the educational intervention “Klassdraget” appear to be larger for the girls which are, by tradition, less interested in recreational fishing as compared to boys.
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2.
  • Andersson, Jonas, 1975- (författare)
  • Ion recombination in liquid ionization chambers : development of an experimental method to quantify general recombination
  • 2013
  • Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
    • An experimental method (the two-dose-rate method) for the correction of general recombination losses in liquid ionization chambers has been developed and employed in experiments with different liquids and radiation qualities. The method is based on a disassociation of initial and general recombination, since an ionized liquid is simultaneously affected by both of these processes.The two-dose-rate method has been compared to an existing method for general recombination correction for liquid ionization chambers, and has been found to be the most robust method presently available.The soundness of modelling general recombination in liquids on existing theory for gases has been evaluated, and experiments indicate that the process of general recombination is similar in a gas and a liquid. It is thus reasonable to employ theory for gases in the two-dose-rate method to achieve experimental corrections for general recombination in liquids. There are uncertainties in the disassociation of initial and general recombination in the two-dose-rate method for low applied voltages, where initial recombination has been found to cause deviating results for different liquids and radiation qualities.Sensitivity to ambient electric fields has been identified in the microLion liquid ionization chamber (PTW, Germany). Experimental data may thus be perturbed if measurements are conducted in the presence of ambient electric fields, and the sensitivity has been found to increase with an increase in the applied voltage. This can prove to be experimentally limiting since general recombination may be too severe for accurate corrections if the applied voltage is low.
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4.
  • Fröberg, Andreas, 1985, et al. (författare)
  • Awareness of current recommendations and guidlines regarding strength training for youth
  • 2014
  • Ingår i: International Journal of Adolescent Medicine and Health. - : Walter de Gruyter GmbH. - 0334-0139 .- 2191-0278. ; 26:4, s. 517-523
  • Tidskriftsartikel (refereegranskat)abstract
    • Aim: Physical conditioning of youth has always been a controversial topic as it raises ethical, physiological, and medical issues. Current recommendations and guidelines suggest that strength training is a relatively safe and worthwhile method in conditioning youth. This, however, requires well-informed coaches who follow age-appropriate strength training recommendations and guidelines, compiles well-designed strength training programs, and provides qualified supervision and instructions. The purpose of this study was to investigate coaches’ awareness of current recommendations and guidelines regarding strength training for youth.Method: A total of 39 football (US: soccer) coaches (34 males and 5 females) training boys in age groups 8–12 years were included in this study. Data were collected using an attitude statement questionnaire, and the assertions were based upon current recommendations and guidelines.Results: The results revealed significant differences among coaches in terms of knowledge of important aspects of strength training for youth.Conclusions: The results suggested that coaches in the present study were not aware of the latest recommendations and guidelines regarding strength training for youth.
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5.
  • Fröberg, Andreas, 1985, et al. (författare)
  • Ledare tveksamma till styrketräningsråd för barn
  • 2011
  • Ingår i: Svensk Idrottsforskning : Organ för Centrum för Idrottsforskning. - Stockholm : Centrum för idrottsforskning (CIF). - 1103-4629. ; :4, s. 47-50
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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6.
  • Fröberg, Andreas, et al. (författare)
  • Ledare tveksamma tillstyrketräningsråd för barn
  • 2011
  • Ingår i: Svensk Idrottsforskning. - Stockholm : Centrum för idrottsforskning (CIF). - 1103-4629. ; :4, s. 47-50
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • I Sverige har vi haft en försiktig hållning till styrketräning för barn.År 2009 kom Riksidrottsförbundet med rekommendationer som imotsats till tidigare tydligt förespråkar styrketräning. I en pilotstudievisar vi bland annat att fotbollsledare från olika divisioner trots detär oeniga om vad som egentligen är det rätta.
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