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  • Artikel  (2)
  • Key words: Bone mineral density — Bone mineral content — Childhood growth — Dual X-ray absorptiometry — Muscle strength.  (1)
  • Observation cost  (1)
  • Springer  (2)
  • American Association for the Advancement of Science
  • Oxford University Press
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  • Artikel  (2)
Verlag/Herausgeber
  • Springer  (2)
  • American Association for the Advancement of Science
  • Oxford University Press
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  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Calcified tissue international 60 (1997), S. 405 -409 
    ISSN: 1432-0827
    Schlagwort(e): Key words: Bone mineral density — Bone mineral content — Childhood growth — Dual X-ray absorptiometry — Muscle strength.
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin , Physik
    Notizen: Abstract. In this population-based study, the relationship between childhood weight and height, and adolescent bone mass and muscle strength have been studied in 39 girls and 48 boys. Total body and femoral neck bone mass measurements (bone mineral content, BMC and bone mineral density, BMD) were made by dual X-ray absorptiometry. Quadriceps muscle strength was measured. Mean age at the time of measurement was 15.1 years for girls and boys. Results were individually linked to data on childhood (birth to 6 years of age) weight and height, taken from community health records. Childhood weight was found to be predictive of adolescent total body BMC (TBMC). However, this was not the case when correlating childhood weight and total body BMD (TBMD), suggesting that growth determines the size of the skeleton, whereas the density within that bone envelope is to a greater extent governed by other factors. Further, in a multiple regression model we found that the combined effect of childhood weight and height was significantly correlated with adolescent quadriceps muscle strength.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Journal of optimization theory and applications 39 (1983), S. 47-58 
    ISSN: 1573-2878
    Schlagwort(e): Observation cost ; quadratic cost ; LQG problems ; optimal observation times
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik
    Notizen: Abstract Feedback control is sometimes applied to a dynamic system operating in a stochastic environment under circumstances where only a limited number of observations can be made. The optimal positioning of ana priori fixed number of observations is considered. A direct approach to this problem yields a dynamic programming functional equation, while a second approach involving an ancillary observation cost leads to a rapid and practical numerical solution.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
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