Erika Karlsson

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Three studies that examined the links between affective personality, as constructed from responses to the Positive Affect (PA) and Negative Affect (NA) Scale (PANAS), and individuals' self-report of self-esteem, intrinsic motivation and Beck's Depression Inventory (BDI) depression in high school students and persons in working occupations are described.(More)
The authors examined the relation between dimensions of attachment and internalizing and externalizing problems in 15- to 16-year-old adolescents (n = 62) who completed the Attachment Style Questionnaire (ASQ; J. Feeney, P. Noller, & M. Hanrahan, 1994) and the Youth Self-Report (YSR; T. M. Achenbach, 1991). In total, the ASQ dimensions accounted for 48% of(More)
  • Mattias Bjj, Kenneth Holmstrr, Sven G Hamp, Andras Ballagi-Pordany, Erika Karlsson
  • 1998
This paper studies the problem of mathematical modeling of the stability of a plasmid in a microorganism. We consider a model based on a two-dimensional ordinary diierential equation. This equation has an analytical solution, which is a nonlinear function in two parameters. These parameters, the rate of which plasmid-free cells are generated from(More)
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