Domus solaratae: Untersuchungen zu Steinhaus und Stadtentstehung um 1100 in Cluny

Um 1100 entstand erstmals seit der Antike wieder eine Stadtkultur in Europa. Nur wenige Zeitzeugnisse sind bisher greifbar, die zum Verständnis dieses Phänomens beitragen. Die detaillierte Untersuchung dokumentiert und datiert in Cluny, einem Zentrum der mittelalterlichen Welt, die bisher frühesten Stadthäuser des Mittelalters in Frankreich, außerdem bestimmt sie den einzigen weitgehend erhaltenen Großbau der Abtei als Aula von Cluny III und korrigiert den Kontext bekannt geglaubter romanischer Stadthäuser. Ergebnis ist eine für Europa exemplarische, differenzierte Typologie der mittelalterlichen "domus solarata", die enge Parallelen etwa zum hochmittelalterlichen Rom oder auch Freiburg i. Br. aufzeigt. Das verbreitete Stadtentstehungsmodell von Cluny wird vor dem Hintergrund der untersuchten Bauten revidiert, die Schriftüberlieferung teils neu ausgewertet, "villa" und "burgus" werden als präurbane Phasen eingegrenzt. Die verformungsgerechte Gebäudedokumentation erschließt zeitspezifisches Bau– und Planungswissen, das die Raumwahrnehmung und –ordnung des Hochmittelalters erhellt und auf die Tradition des spätantiken "Corpus agrimensorum" verweist

Semi-spectral Chebyshev method in Quantum Mechanics

Traditionally, finite differences and finite element methods have been by many regarded as the basic tools for obtaining numerical solutions in a variety of quantum mechanical problems emerging in atomic, nuclear and particle physics, astrophysics, quantum chemistry, etc. In recent years, however, an alternative technique based on the semi-spectral methods has focused considerable attention. The purpose of this work is first to provide the necessary tools and subsequently examine the efficiency of this method in quantum mechanical applications. Restricting our interest to time independent two-body problems, we obtained the continuous and discrete spectrum solutions of the underlying Schroedinger or Lippmann-Schwinger equations in both, the coordinate and momentum space. In all of the numerically studied examples we had no difficulty in achieving the machine accuracy and the semi-spectral method showed exponential convergence combined with excellent numerical stability.Comment: RevTeX, 12 EPS figure

DNA Torsional Solitons in Presence of localized Inhomogeneities

In the present paper we investigate the influence of inhomogeneities in the dynamics and stability of DNA open states, modeled as propagating solitons in the spirit of a Generalized Yakushevish Model. It is a direct consecuence of our model that there exists a critical distance between the soliton's center of mass and the inhomogeneity at which the interaction between them can change the stability of the open state.Furtherly from this results was derived a renormalized potential funtion.Comment: RevTex, 13 pages, 3 figures, final versio

Barycenter and maximum likelihood

We refine recent existence and uniqueness results, for the barycenter of points at infinity of Hadamard manifolds, to measures on the sphere at infinity of symmetric spaces of non compact type and, more specifically, to measures concentrated on single orbits. The barycenter will be interpreted as the maximum likelihood estimate (MLE) of generalized Cauchy distributions on Furstenberg boundaries. As a spin-off, a new proof of the general Knight–Meyer characterization theorem will be given

Cluny (Saône-et-Loire). Ancienne cour avant de la maison romane initiale (XIe s.), résumé du rapport

Beyer I., Flüge Bernhard. Cluny (Saône-et-Loire). Ancienne cour avant de la maison romane initiale (XIe s.), résumé du rapport. In: Archéologie médiévale, tome 29, 1999. p. 233

Saône-et-Loire. Une maison romane de 1091 à Cluny (20 rue du Merle)

Flüge Bernhard, Garrigou Grandchamp Pierre, Salvèque Jean-Denis. Saône-et-Loire. Une maison romane de 1091 à Cluny (20 rue du Merle). In: Bulletin Monumental, tome 158, n°2, année 2000. pp. 151-155

Protective effect of urodilatin (URO) or ANP against an acetylcholine(ACH)-induced bronchoconstriction in the rat in vivo: Abstract

Inhaled ANP inhibits histamine induced bronchoconstriction in man. We compared the protective effect of equimolar doses of intravenous ANP and URO against a bronchoconstriction induced by ACH-inhalation in 46 anaesthetized intubated spontaneously breathing Wistar-rats. The animals received an intravenous infusion of 0.5 ml ANP, URO or vehicle (NaCl) for 10 min. During the infusion period an ACH-challenge test was started after 5 min. Using whole-bodyplethysmography typical spontaneous respiratory function parameters were recorded under steady state conditions before the infusion and before and at the of the ACH-challenge. Forced parameters (volume-time and flow-volume relation) were measured in hyperventilation-induced apnoe after the ACH-challenge and included e.g. FVC, FEV0.1, FEV0.2, PEF, MMEF, FEF75, FEF50 and FEF25. ACH induced a significant bronchoconstriction without any significant difference between the treatment groups regarding the spontaneous breathing and forced volume-time relation parameters. The more sensitive flow-volume curve, however, showed a significant protective effect of 11.4 and 22.8 pmol/kg/min (40 and 80 ng/kg/min) URO compared to the control group while the infusion of ANP was without any significant influence in all three dose groups. Heart rate was controlled by ECG and did not change significantly during the infusion period before and at the end of the ACH-challenge. It is concluded that intravenous URO but not ANP shows a significant protective effect against ACH-induced bronchoconstriction in rats in vivo