1,007 research outputs found
Dissertatio pneumatica de anima separata
No full textquam ... sub praesidio ... dn. Iohannis Lavateri ... examini subiicit Iohannes Henricus Ruegius, phil. cand. author & respondens ...Dedikation an Joh. Conrad Grebel, Joh. Heinrich Hirzel, Caspar Escher, Joh. Heinrich Rahn, Joh. Ulrich Escher, Joh. Heinrich Heidegger (2), Joh. Heinrich Zeller und Joh. Wilhelm Simler auf dem Titelbl. verso. Gedichte von Humbertus a Stavia und Andreas Rauch auf Bl. A4v.Diss. Hohe Schule Zürich, 166
Gödel, Escher, Bach : Les brins d'une guirlande éternelle
No full textInternational audienceQuel rapport y a-t-il entre la musique de Jean-Sébastien Bach, les dessins du graveur néerlandais Maurits Escher, et le célèbre théorème du logicien autrichien Kurt Gödel ? Du premier, on connaît des pièces lisibles indifféremment dans les deux sens, ou répétant le même motif sous des formes toujours nouvelles ; Escher, lui, nous a laissé des images paradoxales de fontaines s'alimentant elles-mêmes, de bandes de Möbius infinies ou de mains s'autodessinant. De Gödel enfin, vient cet étrange théorème posant une limite à la capacité des mathématiques à démontrer leurs propres théorèmes. "Autoréférence" est ainsi le maître mot d'un récit fleuve, devenu livre-culte, d'une totale liberté d'écriture et de ton. De dialogues en chansons, de Lewis Carroll à Magritte, et de la biologie moléculaire à l'intelligence artificielle, l'auteur démonte les rouages logiques sur lesquels reposent toutes les sciences actuelles
Visual art made musical: issues of shape, proportion and large-scale form in Escher sketches
No full textThis dissertation examines the relationship between the orchestral work, Escher Sketches, and the two graphic prints by M.C. Escher on which its music is based, Regular Division of the Plane I and Regular Division of the Plane VI. Chapter 1 provides background information on the two visual works and, generally, on Escher's work with the "regular division of the plane." Chapter 2 discusses how Escher Sketches, a 12-tone piece, utilizes a regular division of the octave in the construction of the prime row forms behind its two movements. Chapter 3 and Chapter 4 explain how Movement I, "Birds and Fish," and Movement II, "Lizards," share structural similarities with Escher's prints at the background, middleground and foreground levels of the music.Ph.D.Includes bibliographical references (p. 105)
Poor prognosis in familial acute myeloid leukaemia with combined biallelic CEBPA mutations and downstream events affecting the ATM, FLT3 and CDX2 genes
No full textCatherine L. Carmichael, Ella J. Wilkins, Henrik Bengtsson, Marshall S. Horwitz, Terence P. Speed, Paul C. Vincent, Graham Young, Christopher N. Hahn, Robert Escher, Hamish S. Scot
Role of CYP27A1 in progesterone metabolism in vitro and in vivo
No full textIn the kidney, progesterone is inactivated to 20alpha-dihydro-progesterone (20alpha-DH-progesterone) to protect the mineralocorticoid receptor from progesterone excess. In an attempt to clone the enzyme with 20alpha-hydroxysteroid activity using expression cloning in CHOP cells and a human kidney expression library, serendipitously cDNA encoding CYP27A1 was isolated. Overexpression of CYP27A1 in CHOP cells decreased progesterone conversion to 20alpha-DH-progesterone in a dose-dependent manner, an effect enhanced by cotransfection with adrenodoxin and adrenodoxin reductase. Incubation of CHOP cells with 27-hydroxycholesterol, a product of CYP27A1, increased the ratio of progesterone/20alpha-DH-progesterone in a concentration-dependent manner, indicating that the effect of CYP27A1 overexpression was mediated by 27-hydroxycholesterol. In order to analyze whether these observations are relevant in vivo, progesterone and 20alpha-DH-progesterone were measured by GC-MS in 24-h urine of CYP27A1 gene knock out (ko) mice and their control wild type (wt) and heterozygote (hz) littermates. In CYP27A1 ko mice, urinary progesterone concentrations were decreased, 20alpha-DH-progesterone increased and the progesterone/20alpha-DH-progesterone ratio decreased threefold (p<0.001). Thus, CYP27A1 modulates progesterone concentrations. The underlying mechanism is inhibition of 20alpha-hydroxysteroid dehydrogenase by 27-hydroxycholesterol. Key words: Progesterone, sterol 27-hydroxylase, 27-hydroxycholesterol, 20a-steroid dehydrogenase, 20a-DH-progesterone
Almost isotropy-maximal manifolds of non-negative curvature
No full textWe extend the equivariant classification results of Escher and Searle for closed, simply connected, Riemannian n-manifolds with non-negative sectional curvature admitting isometric isotropy-maximal torus actions to the class of such manifolds admitting isometric strictly almost isotropy-maximal torus actions. In particular, we prove that any such manifold is equivariantly diffeomorphic to the free, linear quotient by a torus of a product of spheres of dimensions greater than or equal to three. © 2024 American Mathematical Society.Max-Planck-Institut für Mathematik in den Naturwissenschaften; National Science Foundation; Simons Foundation; National Security AgencyThe second author was partially supported by the Simons Foundation (#585481, C. Escher). The third was partially supported by grants from the National Science Foundation (#DMS-1611780, #DMS-1906404, and #DMS-2204324), as well as by the Simons Foundation (#355508, C. Searle). This material is based upon work supported by the National Security Agency under Grant No. H98230-18-1-0144 while the second and third authors were both in residence at the Mathematical Sciences Research Institute in Berkeley, California, during the summer of 2018. A portion of this work draws from the PhD thesis of the first author. The authors would like to thank Fred Wilhelm for helpful comments and suggestions. They also thank the referees for their careful reading of the paper and their suggestions for improvement. Finally, the authors would like to thank both the Fields Institute and the Max Planck Institute for Mathematics for their support during the final revisions of this paper.The second author was partially supported by the Simons Foundation (#585481, C. Escher). The third was partially supported by grants from the National Science Foundation (#DMS-1611780, #DMS-1906404, and #DMS-2204324), as well as by the Simons Foundation (#355508, C. Searle). This material is based upon work supported by the National Security Agency under Grant No. H98230-18-1-0144 while the second and third authors were both in residence at the Mathematical Sciences Research Institute in Berkeley, California, during the summer of 2018
Study on Engineering Foreign Language in Shibako Mizuhane by de Rijke and Sakaiko-Shuchiku-kengi by Escher
No full textShibako Mizuhane and "Sakaiko-Shuchiku-Kengi" are Japanese translations, first one was written by Johannes de Rijke, another was George Arnold Escher, who were employed Holland engineers. These books are preserved in the Mikuni Museum, "Ryu-Sho-Kan". These books consist difficult style concerning words. So they have not been opened to the public. The author already translated them to living, languages. In this study, the author especially investigates in the translation of living words from difficult foreign engineering words.departmental bulletin pape
Extensive venous thrombosis following administration of high-dose glucocorticosteroids and tranexamic acid in relapsed Evans syndrome
No full textMETA-RULES
No full textMeta-rules, or rules for making rules, determine the costs of innovation and thus the pace of economic growth. Adapting rules to a changing economic environment through explicit, well-designed meta- rules makes economic growth quicker, less painful, and more certain than adapting rules through chance-based evolution.Research and Development/Tech Change/Emerging Technologies,
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