Men will stretch out their eyes: Or, What happened to Christopher Wren's inauguralA discussion of Christopher Wren's inaugural address of 1657, and how it came to be widely misquoted so as to appear to be referring to the future discovery of exoplanets instead of contemporary…Robert I McLachlan·Sep 5, 2019SaveLearn
Oral History Interview with Marcello CrestiMarcello Cresti graduated in Physics in 1950 at the University of Pisa by attending the Scuola Normale Superiore; he became professor of Experimental Physics in Padua in 1965, and then Rector of the…Marcello Cresti, Alessandro De Angelis·Sep 2, 2019SaveLearn
Defining of three-dimensional acceleration and inertial mass leading to the simple form F=MA of relativistic motion equationNewton second law of dynamics is a law of motion but also a useful definition of force (F=MA) or inertial mass (M=F/A), assuming a definition of acceleration and parallelism of force and…Grzegorz M. Koczan·Aug 30, 2019SaveLearn
Straddling between determinism and randomness: Chaos theory vis-a-vis LeibnizThe problematic relationship between science and philosophy has, since the beginning of modernity, divided the world into two separate domains: nature and human. Some of today's schools of philosophy…Vedad Famourzadeh, Maysam Sefidkhosh·Aug 30, 2019SaveLearn
The ontological identity of empirical indiscernibles: Leibniz's methodological principle and its significance in the work of EinsteinThis article explores the following methodological principle for theory construction in physics: if an ontological theory predicts two scenarios that are ontologically distinct but empirically…Robert W. Spekkens·Aug 29, 2019SaveLearn
Why Halley did not discover proper motion and why Cassini didIn 1717 Halley compared contemporaneous measurements of the latitudes of four stars with earlier measurements by ancient Greek astronomers and by Brahe, and from the differences concluded that these…Frank Verbunt, Marc van der Sluys·Aug 29, 2019SaveLearn
Strong emergence in condensed matter physicsThis paper argues that the physics of condensed matter cannot be fully reduced to the supposedly fundamental quantum mechanical theory for all the atoms of which the system consists. In fact, there…Barbara Drossel·Aug 28, 2019SaveLearn
Nonconservation of Energy and Loss of Determinism II: Colliding with an Open SetAn actual infinity of colliding balls can be in a configuration in which the laws of mechanics lead to logical inconsistency. It is argued that one should therefore limit the domain of these laws to…David Atkinson, Porter Johnson·Aug 26, 2019SaveLearn
Paisaje celeste y arqueoastronom\'ia: las iglesias hist\'oricas como indicadores de la planimetr\'ia de una ciudad idealAccording to popular tradition, the Canarian city of San Cristobal de La Laguna, a World Heritage Site by UNESCO since 1999, emerged in the early sixteenth century with a novel organization, in line…Alejandro Gangui·Aug 26, 2019SaveLearn
Nonconservation of Energy and Loss of Determinism I. Infinitely Many BallsAn infinite number of elastically colliding balls is considered in a classical, and then in a relativistic setting. Energy and momentum are not necessarily conserved globally, even though each…David Atkinson, Porter Johnson·Aug 26, 2019SaveLearn
Stern-Gerlach: conceptually clean or acceptably vague?This paper develops a number of quantum mechanical characterisations of Stern-Gerlach. It discusses areas of vagueness in their formulation. Philosophers criticise quantum mechanics for unacceptable…Robert Shaw·Aug 22, 2019SaveLearn
Challenges for the periodic systems of elements: chemical, historical and mathematical perspectivesUnveiling numerical trends among either atomic or equivalent weights that somehow preserved resemblances among elements was frequent in the 1860s. Standing out from the crowd, Meyer and Mendeleev…Restrepo Guillermo·Aug 20, 2019SaveLearn
General Relativity, Mental Causation, and Energy ConservationThe conservation of energy and momentum have been viewed as undermining Cartesian mental causation since the 1690s. Modern discussions of the topic tend to use mid-19th century physics, neglecting…J. Brian Pitts·Aug 20, 2019SaveLearn
En busca de los efectos gravitacionales de Birkhoff: la ultracentrfuga transelasticaThis work reviews the origin, development, completion, and outcome of a trans-elastic ultracentrifuge project of Mexico's Nuclear Center through 1971 to 1986. The project had its origin in the search…S. Galindo, C. Cabrera, Jorge L. Cervantes-Cota·Aug 12, 2019SaveLearn
Leibniz Equivalence, Newton Equivalence, and SubstantivalismActive diffeomorphisms map a differentiable manifold to itself. They transform manifold points and objects without changing the system of local coordinates used to represent those objects. What has…Oliver Davis Johns·Aug 12, 2019SaveLearn
Luis Santal\'o and classical field theoryConsidered one of the founding fathers of integral geometry, Luis Santal\'o has contributed to various areas of mathematics. His work has applications in number theory, in the theory of differential…Mariano Galvagno, Gaston Giribet·Aug 8, 2019SaveLearn
"Sufficiently Advanced Technology" for Gravitational Wave DetectionThe science fiction writer Arthur C. Clarke wrote, "Any sufficiently advanced technology is indistinguishable from magic." While not magical by any means, the technology used to detect gravitational…Peter R. Saulson·Aug 7, 2019SaveLearn
An "anti-system" ontology of quantum physics, as derived from two Einstein's conceptions of physical theories. Quantum physics as a theory of general relativity of experimental contextIn glaring contrast to its indisputable century-old experimental success, the ultimate objects and meaning of quantum physics remain a matter of vigorous debate among physicists and philosophers of…Thierry Batard·Jul 31, 2019SaveLearn
Randomness? What randomness?This is a review of the issue of randomness in quantum mechanics, with special emphasis on its ambiguity; for example, randomness has different antipodal relationships to determinism, computability,…Klaas Landsman·Jul 30, 2019SaveLearn
Eddington, Lemaitre and the hypothesis of cosmic expansionArthur Stanley Eddington was one of the leading astronomers and theorists of his generation and a prominent proponent of the general theory of relativity. Yet when his former assistant Georges…Cormac O'Raifeartaigh·Jul 29, 2019SaveLearn
The Culture of Exploratory Experimentation at CERN and the Future CollidersWe have become witnesses, as of late, to the development of an expansive and fertile debate regarding the implementation of future colliders, both within the confines of the scientific community, as…Grigoris Panoutsopoulos·Jul 27, 2019SaveLearn
Sudarshan Memorial LectureIn this invited talk, I discuss four important contributions of E.C.G. Sudarshan, among many. They are the V-A theory of weak interaction, Sudarshan - Glauber representation, tachyons and the quantum…R Parthasarathy·Jul 26, 2019SaveLearn
The Einstein-Bohr debate: finding a common ground of understanding ?After reminding the main issues at stake in the famous Einstein-Bohr debate initiated in 1935, we tentatively propose a way to get them closer, thus shedding a new light on this historical discussion.Nayla Farouki, Philippe Grangier·Jul 25, 2019SaveLearn
100 years of the first experimental test of General RelativityEinsteins general theory of relativity is one of the most important accomplishments in the history of science. Its experimental verification a century ago is therefore an essential milestone that is…Luís C. B. Crispino, Daniel Kennefick·Jul 24, 2019SaveLearn
Neutrino Physics in Historical ContextThis contribution aims to give an overview of the historical context of neutrino physics. I will present the strong social trends that shaped physics and the way physicists worked, along the 20th…Quentin Rodriguez·Jul 24, 2019SaveLearn