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Träfflista för sökning "WFRF:(Jonsson Anders) ;pers:(Jonsson Ulf);spr:eng"

Sökning: WFRF:(Jonsson Anders) > Jonsson Ulf > Engelska

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1.
  • Jonsson, Ulf, et al. (författare)
  • Intimate relationships and childbearing after adolescent depression : a population-based 15 year follow-up study
  • 2011
  • Ingår i: Social Psychiatry and Psychiatric Epidemiology. - 0933-7954. ; 46:8, s. 711-721
  • Tidskriftsartikel (refereegranskat)abstract
    • Purpose: Adolescent depression is associated with a range of interpersonal adversities. We hypothesized that depressed adolescents are at subsequent increased risk of problems related to intimate relationships and childbearing in adulthood, and used longitudinal data to examine this.Method: A population-based investigation of depression in 16 to 17 year olds was followed up after 15 years, at around the age of 30 years. Comparisons were made between adolescents with depression (n = 361, 78% females) and non-depressed peers (n = 248, 77% females). Data from both national registers and personal interviews were used.Results: At follow-up, the former depressed and non-depressed adolescents had become parents to a similar extent. The former depressed females were more likely than the non-depressed females to report abortion, miscarriage, intimate partner violence and sexually transmitted disease. They also reported a higher number of intimate relationships and were more likely to have divorced and to be registered as single mothers. Depressed females with a comorbid disruptive disorder had a particularly poor outcome. In the depressed females without a disruptive disorder, only those who subsequently had recurrent depressions in adulthood were at increased risk of poor outcome. There was no indication that the formerly depressed males were at increased risk of subsequent problems related to intimate relationships.Conclusion: Females with adolescent depression subsequently have problems related to intimate relationships and childbearing. Disruptive disorders and recurrence of depression appear to be instrumental in this association. Attention should be given to intimate relationship problems and sexual and reproductive health issues in young women with depression.
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2.
  • Jonsson, Ulf, et al. (författare)
  • Subsequent higher education after adolescent depression : A 15-year follow-up register study
  • 2010
  • Ingår i: European psychiatry. - 0924-9338. ; 25:7, s. 396-401
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Adolescent depression has been shown to have a range of adverse outcomes. We used longitudinal data to investigate subsequent higher education in former depressed adolescents. Method: A Swedish population-based investigation of depression in 16-17-year-olds was followed up in national registers 15 years later. Adolescents with depression (n=361, 78% females) were compared to a group of non-depressed peers of the same age (n=248, 77% females). The main outcome was graduation from higher education by age 30. Results: The adolescent with depression were less likely than their non-depressed peers to have graduated from higher education by age 30, both regarding females (27.7% vs. 36.4%, p<05) and males (12.7% vs. 28.6%, p<05). After adjustment for early school performance, socioeconomic status and maternal education, the decreased likelihood of subsequent graduation from higher education remained for depressed males (OR, 0.27; 95% CI, 0.08-0.93) but not for depressed females (OR, 0.93; 95% CI, 0.58-1.49). Conclusion: Contrary to what previous research has suggested, adolescent depression and its consequences might be particularly destructive to subsequent higher education in males.
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3.
  • Mariethoz, Sebastien, et al. (författare)
  • Comparison of Hybrid Control Techniques for Buck and Boost DC-DC Converters
  • 2010
  • Ingår i: IEEE Transactions on Control Systems Technology. - IEEE. - 1063-6536. ; 18:5, s. 1126-1145
  • Tidskriftsartikel (refereegranskat)abstract
    • Five recent techniques from hybrid and optimal control are evaluated on two power electronics benchmark problems. The benchmarks involve a number of practically interesting operating scenarios for fixed-frequency synchronous dc-dc converters. The specifications are defined such that good performance can only be obtained if the switched and nonlinear nature of the problem is accounted for during the design phase. A nonlinear action is featured in all methods either intrinsically or as external logic. The designs are evaluated and compared on the same experimental platform. Experiments show that the proposed methods display high performances, while respecting circuit constraints, thus protecting the semiconductor devices. Moreover, the complexity of the controllers is compatible with the high-frequency requirements of the considered application.
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