In memoriam Yurii Fedorovich Smirnov: Some personal reminiscences on a great physicistYurii Fedorovich Smirnov (1935-2008) was a famous theoretical physicist. He achieved his career mainly at the Institute of Nuclear Physics of Moscow. These notes describe some particular facets of…Maurice Robert Kibler·Jul 21, 2009SaveLearn
On Kant's first insight into the problem of space dimensionality and its physical foundationsIn this article it is shown that a careful analysis of Kant's "Thoughts on the True Estimation of Living Forces" leads to a conclusion that does not match the usually accepted interpretation of…Francisco Caruso, Roberto Moreira Xavier·Jul 21, 2009SaveLearn
The History of the Guralnik, Hagen and Kibble development of the Theory of Spontaneous Symmetry Breaking and Gauge ParticlesI discuss historical material about the beginning of the ideas of spontaneous symmetry breaking and particularly the role of the Guralnik, Hagen Kibble paper in this development. I do so adding a…Gerald S. Guralnik·Jul 20, 2009SaveLearn
Physics and Five Problems in the Philosophy of MindSince Descartes' dualism, with his res extensa and res cogitans, six fundamental problems in the philosophy and natural history of mind are these: 1. how does mind act on matter? 2. If mind does…Stuart Kauffman·Jul 15, 2009SaveLearn
Yuval Ne'eman and How He Influenced My Life and CareerAn early phase of theoretical high energy physics in Israel specifically that connected with Yuval Ne'eman and a small group of my classmates, myself, and several others who worked around him…Shmuel Nussinov·Jul 14, 2009SaveLearn
Homi Jehangir Bhabha : Architect of Modern Science and Technology in IndiaAfter describing Bhabha's early life at Bombay, now Mumbai, we discuss his research career at Cambridge, where he made many distinguished contributions to positron physics, cosmic rays and the meson…Virendra Singh·Jun 18, 2009SaveLearn
SWU for You and MeThe subject of uranium isotope separation by the use of gas cenrifuges is a very active one. I present the physics of this process and some of its history.Jeremy Bernstein·Jun 13, 2009SaveLearn
Astronomy and astronomers in Jules Verne's novelsAlmost all the "Voyages Extraordinaires" written by Jules Verne refer to astronomy. In some of them, astronomy is even the leading theme. However, Jules Verne was basically not learned in…Jacques Crovisier·Jun 5, 2009SaveLearn
More is the Same; Phase Transitions and Mean Field TheoriesThis paper looks at the early theory of phase transitions. It considers a group of related concepts derived from condensed matter and statistical physics. The key technical ideas here go under the…Leo P. Kadanoff·Jun 3, 2009SaveLearn
Had the planet mars not existed: Kepler's equant model and its physical consequencesWe examine the equant model for the motion of planets, which has been the starting point of Kepler's investigations before he modified it because of Mars observations. We show that, up to first…Christian Bracco, Jean-Pierre Provost·Jun 2, 2009SaveLearn
The Astronomy of Aboriginal AustraliaThe traditional cultures of Aboriginal Australians include a significant astronomical component, which is usually reported in terms of songs or stories associated with stars and constellations. Here…Ray P. Norris, Duane W. Hamacher·May 31, 2009SaveLearn
Solar physics at the Kodaikanal Observatory: A Historical PerspectiveThis article traces the birth and growth of solar physics at the Kodaikanal Observatory of the Indian Institute of Astrophysics, Bangalore, India. A major discovery took place here in 1909 by John…S. S. Hasan, D. C. V. Mallik, S. P. Bagare et al.·May 31, 2009SaveLearn
The question "Are We Alone?" in different culturesA survey of the worldwide litterature reveals that the question "Are We Alone in the Universe?" has been formulated only in the western litterature. Here I try to understand why it is so. To…Jean Schneider·May 26, 2009SaveLearn
The Order of Sir BondiThe direct and indirect relationship between the British physicist originally from Austria, Sir Hermann Bondi, and Venezuelan physics are presented. Special emphasis is made of his more remarkable…W. Barreto·May 20, 2009SaveLearn
Bhabha's Contributions to Elementary Particle Physics and Cosmic Rays ResearchBhabha's scientific research contributions are descibed in the context of his life and contemporary science. During the Cambridge period(1927-1939),he worked in Positron theory(Bhabha…Virendra Singh·May 14, 2009SaveLearn
Orientations of the Giant's Churches in Ostrobothnia, FinlandThe orientations of 23 Giant's Churches, dating from 2500-2000 BCE, located in Ostrobothnia, Finland, have been measured. Many of them are found to have orientations to the risings and settings…Marianna Ridderstad, Jari Okkonen·May 13, 2009SaveLearn
Critical phenomena: 150 years since Cagniard de la TourCritical phenomena were discovered by Cagniard de la Tour in 1822, who died 150 years ago. In order to mark this anniversary, the context and the early history of his discovery is reviewed. We then…Bertrand Berche, Malte Henkel, Ralph Kenna·May 12, 2009SaveLearn
On Facts in Superstring Theory. A Case Study: The AdS/CFT CorrespondenceDespite the lack of experimental confirmation and of unambiguous theoretical proof, superstring theory has long been considered by many the only consistent quantized theory of gravity and the unique…Oswaldo Zapata·May 9, 2009SaveLearn
Indeterminism and Randomness Through PhysicsDespite provable unknowables in recursion theory, indeterminism and randomness in physics is confined to conventions, subjective beliefs and preliminary evidence. The history of the issue is very…Karl Svozil·May 6, 2009SaveLearn
Misleading signposts along the de Broglie-Bohm road to quantum mechanicsEighty years after de Broglie's, and a little more than half a century after Bohm's seminal papers, the de Broglie--Bohm theory (a.k.a. Bohmian mechanics), which is presumably the simplest…Michael K. -H. Kiessling·May 5, 2009SaveLearn
Copenhagen Interpretation of Quantum Theory and the Measurement ProblemThe Copenhagen interpretation of quantum theory is investigated from a philosophical point of view. It is justified the opinion that the philosophical attitude the Copenhagen interpretation is based…Martin Kober·May 4, 2009SaveLearn
Atomism versus Holism in Science and PhilosophyThe pros and cons of various forms of atomism and holism that are applicable both in physical science and today's philosophy of nature are evaluated. To this end, Lewis' thesis of Humean…Vassilios Karakostas·May 1, 2009SaveLearn
At the other end of the sun's path. A new interpretation of Machu PicchuThe Inca citadel of Machu Picchu is usually interpreted as a "royal estate" of the Inca ruler Pachacuti. This idea is challenged here by a critical reappraisal of existing sources and a…Giulio Magli·Apr 30, 2009SaveLearn
Leon Rosenfeld and the challenge of the vanishing momentum in quantum electrodynamicsLeon Rosenfeld published in 1930 the first systematic Hamiltonian approach to Lagrangian models that possess a local gauge symmetry. The application of this formalism to theories with local internal…Donald Salisbury·Apr 25, 2009SaveLearn
Realism vs. Constructivism in Contemporary Physics: The Impact of the Debate on the Understanding of Quantum Theory and its Instructional ProcessIn the present study we attempt to incorporate the philosophical dialogue about physical reality into the instructional process of quantum mechanics. Taking into account that both scientific realism…Vassilios Karakostas, Pandora Hadzidaki·Apr 18, 2009SaveLearn