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Digitale Medien

New observations on midline defects: Coincidence of anophthalmos, microphthalmos and cryptophthalmos with hypothalamic disorders (1991)

Bierich, J. R. ; Christie, M. ; Heinrich, J. J. ; [weitere]

Springer

European journal of pediatrics 150 (1991), S. 246-249

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ISSN: 1432-1076

Schlagwort(e): Midline defects ; Anophthalmos ; Microphthalmos ; Cryptophtalmos ; Hypothalamic defects

Quelle: Springer Online Journal Archives 1860-2000

Thema: Medizin

Notizen: Abstract Four children with severe congenital eye anomalies are described of which three had related symptoms. Two had bilateral anophthalmia, the optic nerves not detectable by computed cranial tomography and magnetic resonance imaging, and the third child had bilateral microphthalmia and coloboma iridis. The fourth patient had bilateral cryptophthalmia as part of Fraser syndrome. All four patients were of small stature. In three of them growth hormone deficiency was demonstrated which was of hypothalamic origin as shown by growth hormone releasing hormone tests. In the fourth child hypogonadotropic hypogonadism and tertiary thyroid deficiency were diagnosed which responded well to thyroxine treatment. Pathogenetically the described disorders are due to congenital defects of midline structures as a common “developmental field”.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01955522

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Digitale Medien

Phase diagram of the one-state potts model on the Cayley tree (1990)

Aguiar, F. S. ; Bosco, F. A. ; Martinez, A. S. ; [weitere]

Springer

Journal of statistical physics 58 (1990), S. 1231-1238

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ISSN: 1572-9613

Schlagwort(e): Bethe-Peierls map ; Möbius transformation ; logistic map ; mean-field percolation ; McKay-Berker-Kirkpatrick spin-glass

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The phase diagram of the one-state Potts model on the closed asymmetric Cayley tree with branching ratior=2 is obtained from the Bethe-Peierls map. The route to chaos, via the period doubling cascade, is obtained by considering the antiferromagnetic coupling limit. The connection of the Potts model with the percolation problem is shown by calculating the order parameter, its susceptibility, the internal energy, and the specific heat as well as their asymptotic behavior at the paramagnetic-ferromagnetic critical point. Due to the type of the lattice and to the polynomial character of the map, this is the simplest known example of a McKay-Berker-Kirkpatrick spin-glass.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01026573

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