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János Bolyai
Biographie des ungarischen Mathematikers János Bolyai (1802-1860), der etwa gleichzeitig mit dem russischen Mathematiker Nikolai Lobatschewski und unabhängig von ihm die nichteuklidische Revolution eingeleitet hat. Diese erbrachte den Nachweis, dass die euklidische Geometrie keine Denknotwendigkeit ist, wie Kant irrtümlicherweise annahm. Das Verständnis für die kühnen Gedankengänge verbreitete sich allerdings erst in der zweiten Hälfte des 19. Jahrhunderts durch die Arbeiten von Riemann, Beltrami, Klein und Poincaré. Die nichteuklidische Revolution war eine der Grundlagen für die Entwicklung der Physik im 20. Jahrhundert und für Einsteins Erkenntnis, dass der uns umgebende reale Raum gekrümmt ist. Tibor Weszely schildert das wechselvolle Leben des Offiziers der K.u.K.-Armee, der krank und vereinsamt starb. Bolyai hat sich auch intensiv mit den komplexen Zahlen und mit Zahlentheorie befasst, ebenso auch mit philosophischen und sozialen Fragen („Allheillehre“) sowie mit Logik und Grammatik.
A - Günther
Staatsbibliothek zu Berlin - Preußischer Kulturbesitz, ; Walravens, Hartmut; Olejniczak, Ursula; Schmiedecke, Käthe: Internationale Bibliographie der Bibliographien 1959-1988 (IBB). Personennamenregister / A - Günther.
The Archaeology and Material Culture of Queenship in Medieval Hungary, 1000–1395
This book explores an alternate history of the power and agency of 30 Hungarian queens over 400 years by a rigorous examination of the material culture connected with their lives. By researching the objects, images, and spaces, it demonstrates how these women expressed and displayed their power. Queens used material culture and space not only to demonstrate their own power to a wide, international audience, but also to consolidate their own position when it was weakened by external circumstances. Both the public and private image of the queen factors significantly in understanding in her own role at the strongly centralized Hungarian court, and, moreover, how her position and person strengthened and complemented that of the king.
The Swimmer
Hungary, 1956. Without a word, Katalin leaves her family and sets out for the West. Her husband, Kalman, abandons the family farm and begins a long and circuitous journey through Hungary with his two young children, Kata and Isti. Staying briefly with distant relatives in unfamiliar cities and villages, Kalman keeps his family on the move and shuns anything resembling a home or a steady life. As their father sinks into depression, Kata and her brother create their own imaginary universe: Kata invents relationships with the people they meet during their long journey while Isti converses with the world around him-houses, stones, snow, skies. It is only in rare moments, on riverbanks and lakeshores where Kata and Isti swim with their father, that they experience a semblance of calm and happiness. Moments that feel as if life is just beginning for them . . .
Oxford Exam Excellence
All key exam topics and vocabulary covered. Practice of all main test task types in Reading, Listening, Use of English, Writing, and Speaking. Exam techniques, preparation strategies, and useful study tips. Multi-ROM containing recorded material for the Listening tasks and tapescripts. Word Bank with key vocabulary, Speaking Bank with useful communicative phrases, and Writing Bank with model texts and advice. Smart answer key that explains why an answer is correct.
More Gray, More Volatile? Aging and (Optimal) Monetary Policy
The evidence on the inflation impact of aging is mixed, and there is no evidence regarding the volatility of inflation. Based on advanced economies’ data and a DSGE-OLG model, we find that aging leads to downward pressure on inflation and higher inflation volatility. Our paper is also the first, using this framework, to discuss how aging affects the transmission channels of monetary policy. We are also the first to examine aging and optimal central bank policies. As aging redistributes wealth among generations and the labor force becomes more scarce, our model suggests that aging makes monetary policy less effective and in more gray societies central banks should react more strongly to nominal variables.
Encoding Visual Features by Parallel Ganglion Cell Initiated Pathways in the Healthy, Diseased and Artificial Retina
Photons are sensed by retinal photoreceptors whose matrix-like distribution underlies the transformation of illumination patterns of the visual scene into photoreceptor activity patterns in a visuotopic fashion. Activity of neighboring photoreceptors then are compared by secondary bipolar cells to decipher information regarding luminosity- and color-contrast. Bipolar cells achieve this by comparing signals received directly from their center receptive field with those come from spatially offset surrounding receptive field areas mediated by inhibitory, sign-inverting horizontal cells. This information is ultimately sent to retinal ganglion cells, the output neurons of the retina. In addition ...
Hungary
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