Finite-Elemente-Analyse einer Transversalflussmaschine

An efficient and resource saving method to generate the different angular rotor positions of a transverse flux machine with a 3D finite element model is presented. The calculations are performed with the superelement analysis of the EMAS solver. From the magnetostatic results the torque-position relationships and the stray field energy in the rotor shaft are evaluated in the steady state condition for different values of the excitation current.     

Buchbesprechungen

Ohne Zusammenfassung     

Informationstagung Mikroelektronik 1999

Ohne Zusammenfassung     

Hydroxyl radical-induced hydrogen/deuterium exchange in amino acid carbon-hydrogen bonds

BB rats are used as models of autoimmune human IDDM. Genetic control of IDDM in both species is complex, including both major histocompatibility complex (MHC)-linked and non-MHC-linked genes. DP-BB rats develop IDDM spontaneously. Expression of disease in these animals requires homozygosity at the lyp locus, which causes lymphopenia. All genetic analyses of BB rat diabetes to date have backcrossed to the DP-BB strain or used (DP-BB x non-BB)F2 animals to ensure that a fraction of progeny are homozygous for lyp. Here we report the analysis of a backcross of the DP-BB rat to the histocompatible WF rat. Neither WF nor (WF x DP-BB)F1 animals develop spontaneous IDDM. However, 95% of (WF x DP-BB)F1 rats and a fraction of (WF x DP-BB) x WF backcross animals readily develop IDDM after treatment with polyinosinic:polycytidylic acid and a cytotoxic anti-RT6.1 monoclonal antibody. Using simple sequence length polymorphism analysis, we have mapped loci on chromosomes 4 and 13 that show significant linkage to IDDM expression and insulitis. The susceptibility locus on chromosome 4 is linked to, but not identical to, lyp. We propose a disease model for the BB rat that requires 1) the RT1u MHC haplotype for disease susceptibility, 2) a new locus on chromosome 4 for disease initiation (as measured by insulitis), 3) a new locus on chromosome 13 for disease progression in response to environmental perturbation, and 4) lyp for spontaneous expression of disease.     

Ein schnell messendes Laser-Speckle-Extensometer zur Bestimmung von statischen und dynamischen Materialparametern

In order to increase the measurement rate of so far in use laser straining sensors an absolutely new type of sensors has been developed. These sensors are based on Fourier optical data pre-processing. In this paper advantages and disadvantages of these Fourier optical sensors are discussed.