Geometrical Properties of Conformal Field Theories Coupled to Two-Dimensional Quantum Gravity

In this work we discuss an approach due to F. David to the geometry of world sheets of non-critical strings in quasiclassical approximation. The gravitational dressed conformal dimension is related to the scaling behavior of the two-point function with respect to a distance variable. We show how this approach reproduces the standard gravitational dressing in the next order of perturbation theory. With the same technique we calculate the intrinsic Hausdorff dimension of a world sheet.Comment: 10 pages, TeX, no figure

The Blazhko behavior of RV UMa

RV UMa is one of the most extensively studied RR Lyrae stars showing Blazhko modulation. Its photometric observations cover more than 90 years. The published photoelectric observations of RV UMa obtained at the Konkoly Observatory (Kanyo, 1976) were re-considered and completed with previously unpublished data. During the time interval of the observations the periods of both the pulsation and the modulation varied within the ranges of 0.000007 and 0.9 days, respectively. We have found a definite but not strict inverse relation between the pulsation and modulation periods of RV UMa.Comment: 4 pages, 5 figures, accepted for publication in A

Formale Erschließung und Formate in Gegenwart und Zukunft – unter besonderer Berücksichtigung des MAB-Formates

In dem Artikel gibt die Autorin einen Überblick über den Stand von Regelwerk und MAB-Format im Jahr 1997 und beschreibt den Einfluss von Online-Kommunikation und Datenbanksystemen auf Regelwerks- und Formatentwicklung

Spatial displays as a means to increase pilot situational awareness

Experiences raise a number of concerns for future spatial-display developers. While the promise of spatial displays is great, the cost of their development will be correspondingly large. The knowledge and skills which must be coordinated to ensure successful results is unprecedent. From the viewpoint of the designer, basic knowledge of how human beings perceive and process complex displays appears fragmented and largely unquantified. Methodologies for display development require prototyping and testing with subject pilots for even small changes. Useful characterizations of the range of differences between individual users is nonexistent or at best poorly understood. The nature, significance, and frequency of interpretation errors associated with complex integrated displays is unexplored and undocumented territory. Graphic displays have intuitive appeal and can achieve face validity much more readily than earlier symbolic displays. The risk of misleading the pilot is correspondingly greater. Thus while some in the research community are developing the tools and techniques necessary for effective spatial-display development, potential users must be educated about the issues so that informed choices can be made. The scope of the task facing all is great. The task is challenging and the potential for meaningful contributions at all levels is high indeed

Which Truth? How to Overcome a Post-Truth Society

In Post-Truth, Scepticism & Power untersucht Stuart Sim, kritischer Theoretiker und überzeugter Anhänger einer liberalen Demokratie, die verschiedenen gesellschaftlichen Bereiche, in denen post-truth vorkommt. Das umfasst die Wahrheitsgeschichte, politische und philosophische Diskussionen und Beispiele, um die Theorien zu untermauern. Sim thematisiert Strategien um post-truth entgegenzutreten. Sim gibt zu, dass ist Wahrheit kein einfaches Konzept ist, aber die Basis für eine Demokratie sein muss.In Post-Truth, Scepticism & Power Stuart Sim, a critical theorist and strong believer in a liberal democracy, examines the many different realms of society in which post-truth plays a role. This spans a historical outline of the history of truth, political and philosophical discussions, and several very fitting examples to underline the theories. Sim thematizes different strategies to counter post-truth. Sim admits that truth is a difficult concept, but it needs to be the basis of democracy