Einstein s Theory of Unified Fields

Author: Marie Antoinette Tonnelat
Publisher: Routledge
ISBN: 1317698797
Format: PDF, Docs
Download Now
First published in1966, here is presented a comprehensive overview of one of the most elusive scientific speculations by the pre-eminent genius of the 20th century. The theory is viewed by some scientists with deep suspicion, by others with optimism, but all agree that it represents an extreme challenge. As the author herself affirms, this work is not intended to be a complete treatise or ‘didactic exposition’ of the theory of unified fields, but rather a tool for further study, both by students and professional physicists. Dealing with all the major areas of research which together comprise the development of a working model, the author ranges over conservation equations, variational principles, solutions of spherical symmetry, and treats a wide selection of Einstein’s own equations. The final chapter indicates problems associated with the unified field theory, in particular the energy-momentum tensor and geodesics.

Biographical Dictionary of Twentieth century Philosophers

Author: Stuart Brown
Publisher: Taylor & Francis
ISBN: 9780415286053
Format: PDF, Mobi
Download Now
The biographical dictionary also includes a number of general entries dealing with important schools of philosophy, such as the Vienna Circle, or currents of thought, such as vitalism. These allow the reader to set the individual biographies in the context of the philosophical history of the period. The structure of the book is alphabetical by philosopher. Each entry is identically structured for ease of access and covers: nationality; dates and place of birth and death; philosophical style or school; areas of interest; higher education; significant influences; main appointments; main publications; secondary literature; account of intellectual development and main ideas; and critical reception and impact. At the end of the book a glossary gives accounts of the schools, movements and traditions to which these philosophers belonged, and thorough indexes enable the reader to access the information in several ways: by nationality; by major areas of contribution to philosophy e.g. aesthetics; by major influences on the thinker concerned e.g. Plato, Kant, Wittgenstein.

Einstein

Author: Thomas Ryckman
Publisher: Routledge
ISBN: 1351707892
Format: PDF, ePub, Docs
Download Now
Albert Einstein (1879–1955) was the most influential physicist of the 20th century. Less well known is that fundamental philosophical problems, such as concept formation, the role of epistemology in developing and explaining the character of physical theories, and the debate between positivism and realism, played a central role in his thought as a whole. Thomas Ryckman shows that already at the beginning of his career - at a time when the twin pillars of classical physics, Newtonian mechanics and Maxwell’s electromagnetism were known to have but limited validity - Einstein sought to advance physical theory by positing certain physical principles as secure footholds. That philosophy produced his greatest triumph, the general theory of relativity, and his greatest failure, an unwillingness to accept quantum mechanics. This book shows that Einstein’s philosophy grew from a lifelong aspiration for a unified theoretical representation encompassing all physical phenomena. It also considers how Einstein’s theories of relativity and criticisms of quantum theory shaped the course of 20th-century philosophy of science. Including a chronology, glossary, chapter summaries, and suggestions for further reading, Einstein is an ideal introduction to this iconic figure in 20th-century science and philosophy. It is essential reading for students of philosophy of science, and is also suitable for those working in related areas such as physics, history of science, or intellectual history.

Eine kurze Geschichte der Menschheit

Author: Yuval Noah Harari
Publisher: DVA
ISBN: 364110498X
Format: PDF, Mobi
Download Now
Krone der Schöpfung? Vor 100 000 Jahren war der Homo sapiens noch ein unbedeutendes Tier, das unauffällig in einem abgelegenen Winkel des afrikanischen Kontinents lebte. Unsere Vorfahren teilten sich den Planeten mit mindestens fünf weiteren menschlichen Spezies, und die Rolle, die sie im Ökosystem spielten, war nicht größer als die von Gorillas, Libellen oder Quallen. Vor 70 000 Jahren dann vollzog sich ein mysteriöser und rascher Wandel mit dem Homo sapiens, und es war vor allem die Beschaffenheit seines Gehirns, die ihn zum Herren des Planeten und zum Schrecken des Ökosystems werden ließ. Bis heute hat sich diese Vorherrschaft stetig zugespitzt: Der Mensch hat die Fähigkeit zu schöpferischem und zu zerstörerischem Handeln wie kein anderes Lebewesen. Anschaulich, unterhaltsam und stellenweise hochkomisch zeichnet Yuval Harari die Geschichte des Menschen nach und zeigt alle großen, aber auch alle ambivalenten Momente unserer Menschwerdung.