About
273
Publications
78,087
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
1,678
Citations
Introduction
I am a physicist working mainly with gravitation (Relational Mechanics, Mach's principle and the origin of inertia), electromagnetism (Weber's Electrodynamics, Ampere's force between current elements, electric field outside resistive wires carrying steady currents, propagation of electromagnetic signals), cosmology (Hubble's law of redshifts, cosmic background radiation, tired light, infinite universe in space and time) and history of science. Website: http://www.ifi.unicamp.br/~assis
Publications
Publications (273)
This is the fifth of 5 volumes of the book "Wilhelm Weber’s Main Works on Electrodynamics Translated into English". It contains the following translations: (a) The introduction of Gauss’ 1840 paper on the general propositions relating to attractive and repulsive forces acting in the inverse ratio of the square of the distance. (b) Weber’s two paper...
This book contains complete and commented translations of the main works of Charles-Augustin de Coulomb (1736-1806) on torsion, electricity, and magnetism. They include the 1777 prize winning work on the best method of making magnetic needles, the 1784 paper with the law of torsion of metal wires and his 7 major Memoirs on electricity and magnetism...
This book contains complete translations, from French to Portuguese, of the main works of Charles-Augustin de Coulomb (1736-1806) related to electricity and magnetism, with commentary. Esse livro contém traduções do francês para o português, completas e comentadas, das principais obras de Charles-Augustin de Coulomb (1736-1806) sobre eletricidade e...
This is the third of 5 volumes of the book “Wilhelm Weber’s Main Works on Electrodynamics Translated into English”. This third Volume contains Weber's main works related to diamagnetism, including his Third major Memoir on Electrodynamic Measurements (1852). These works are followed by three papers published by Weber and Rudolf Kohlraush in 1855-18...
This is the fourth of 5 volumes of the book “Wilhelm Weber’s Main Works on Electrodynamics Translated into English”. This fourth Volume begins with the English translation of Gauss' posthumous paper published in 1867. He arrived at a force law depending on the positions and velocities of the interacting electrified particles from which he could ded...
This is the second of 5 volumes of the book “Wilhelm Weber’s Main Works on Electrodynamics Translated into English”. This second Volume begins with the text of the Gauss-Weber correspondence of 1845. It is related to Ampère's force between current elements and Weber's ideas about the unification of the electrostatic and electrodynamic laws. It is f...
This is the first of 5 volumes of the book “Wilhelm Weber’s Main Works on Electrodynamics Translated into English”. It begins with Gauss' work on the absolute measure of the Earth's magnetic force. In this work Gauss introduced the absolute system of units in which electromagnetic magnitudes were measured based on the dimensions of length, mass and...
Presentation: http://www.ijhsci.info/hsci2021/hsci2021-presentations/20210627144058_Electricity-Assis_pq.mp4
Slides: http://www.ifi.unicamp.br/~assis/Electricity-20-07-2021.pdf
Resenha:
Este livro originou-se de
um projeto internacional denominado Ciência e Democracia:
<http://www.dmi.unipg.it/mamon
e/sci-dem/>. Este projeto tem sido
coordenado desde a sua criação
por Marco Mamone Capria, o
editor deste livro. Ele é professor
do Departamento de Matemática
da Universidade de Perugia na
Itália. Pesquisa e ensina sobre
geome...
A origem do desvio para o vermelho das fontes estelares, galáxias e
quasares tem sido discutida há muito tempo. A maioria dos trabalhos neste
tema interpretou o fenômeno do desvio para o vermelho como sendo um
efeito Doppler associado com a recessão das fontes (principalmente galáxias). Esta interpretação leva diretamente à ideia do estrondão (big...
This is the first complete English translation of W. Weber’s paper of 1846 entitled: Elektrodynamische Maassbestimmungen: Ueber ein allgemeines Grundgesetz der elektrischen Wirkung. This work was originally published at the Abhandlungen bei Begründung der Königl. Sächs. Gesellschaft der Wissenschaften am Tage der zweihundertjährigen Geburtstagfeier...
This is the first complete English translation of W. Weber’s posthumous paper entitled: Elektrodynamische Maassbestimmungen insbesondere über den Zusammenhang des elektrischen Grundgesetzes mit dem Gravitationsgesetze. This work was originally published in W. Weber’s Werke, Vol. IV: Galvanismus und Elektrodynamik, Part 2, edited by H. Weber (Berlin...
Editor's Note: English translation of Wilhelm Weber's 1852 paper ``Elektrodynamische Maassbestimmungen insbesondere Widerstandsmessungen''. This paper, [Web52], is the second of Weber's eight major Memoirs on ``Elektrodynamische Maassbestimmungen'', Determinations of Electrodynamic Units. One of the important aspects of this work is Weber's pioneer...
Charles Édouard Guillaume (1861–1938) was a Swiss physicist who received the 1920 Nobel Prize in physics for his precision measurements and discovery of anomalies in nickel steel alloys. In this work, we present a complete and commented translation of his remarkable article of 1896 on the temperature of interstellar space. The importance of this wo...
An English translation of Wilhelm Weber's 1878 paper "Ueber die Energie der Wechselwirkung", [Web78b]. This work is an excerpt from Weber's seventh major Memoir on Electrodynamic Measurements, "Elektrodynamische Maassbestimmungen", [Web78a] with English translation in [Web20].
English translation of Wilhelm Weber's 1864 paper "Elektrodynamische Maassbestimmungen, insbesondere über elektrische Schwingungen", [Web64]. This work is the fifth of Weber's eight major Memoirs with the general title of Electrodynamic Measurements, "Elektrodynamische Maassbestimmungen".
English translation of Wilhelm Weber's 1841 paper "Messung starker galvanischer Ströme bei geringem Widerstande nach absolutem Maasse", [Web41a].
English translation of Friedrich Wöhler and Wilhelm Weber's 1841 paper "Zusammensetzung galvanischer Säulen", [WW41c].
English translation of Carl Neumann's 1868 paper "Die Principien der Elektrodynamik", [Neu68a].
we analyzed hte history of modern cosmology based on the redshift phenomenon and on the cosmic background radiation (CBR).
Marco Mamone Capria (editor)
Editora Lulu Press, Raleigh, US, 2013, 1a
edição, 450 p
ISBN: 9781291446838
Palavras-chave: Ciência. Democracia. Controvérsias.
Keywords: Science. Democracy.
Controversies.
Este livro originou-se de
um projeto internacional denominado Ciência e Democracia:
<http://www.dmi.unipg.it/mamon
e/sci-dem/>. Este projeto tem sid...
Ensaio "Arp's Indomitable Universe", do livro THE GALILEO OF PALOMAR, em homenagem a Halton Arp.
Neste capítulo discutimos ideias apresentadas em alguns trabalhos recentes Reber (1986), Arp (1987) e Assis (1992) que mostram uma interpretação alternativa que também é consistente com os dados observacionais.
Apresentamos, além disso, uma análise histórica do tema, citando vozes discordantes em relação a este paradigma do estrondão.
English translation of Wilhelm Weber’s 1878 paper “Elektrodynamische Maassbestimmungen
insbesondere über die Energie der Wechselwirkung”, [Web78]. This work is the seventh of Weber’s eight major Memoirs on “Elektrodynamische Maassbestimmungen”, Electrodynamic
Measurements.
We consider a resistive solenoid around a type-I superconductor which is free to turn around its axis. When a variable current flows through the solenoid, a current is induced in the superconductor. The free electrons of the superconductor begin to rotate in one direction, while the positive lattice of the superconductor rotates in the opposite dir...
English translation of Wilhelm Weber's 1841 paper "Ueber das elektrochemische Aequivalent des Wassers", [Web41b] and [Web42].
English translation of Wilhelm Weber's 1863 paper "Ueber die Abhandlung Elektrodynamische Maassbestimmungen, insbesondere über elektrische Schwingungen", [Web63] related to [Web64]. This work is the Foreword to Weber's fifth major Memoir on "Elektrodynamische Maassbestimmungen", Electrodynamic Measurements.
English translation of Wilhelm Weber's 1852 paper "Electrodynamische Maassbestimmungen insbesondere über Diamagnetismus", [Web52a]. This work is the third of Weber's eight major Memoirs on "Elektrodynamische Maassbestimmungen", Electrodynamic Measurements. Paper translated by U. Frauenfelder. Edited by U. Frauenfelder and A. K. T. Assis. Posted in...
English translation of Wilhelm Weber's 1855 paper "Vorwort bei der Übergabe der Abhandlung: Elektrodynamische Maassbestimmungen, insbesondere Zurückführung der Stromintensitäts-Messungen auf mechanisches Maass", [Web55] related to [KW57]. Translated by D. H. Delphenich and edited by A. K. T. Assis. Posted in November 2019 at https://www.ifi.unicamp...
English translation of Wilhelm Weber's 1876 paper ``Bermerkungen zu Edlund's Erwiderung auf zwei gegen die unitarische Theorie der Elektricität gemachte Einwürfe'', [Web76], related to [Edl75]. Translated by Laurence Hecht and edited by A. K. T. Assis. Posted in October 2019 at https://www.ifi.unicamp.br/~assis
English translation of Carl Neumann's 1869 paper "Notizen zu einer kürzlich erschienenen Scrift über die Principien der Elektrodynamik", [Neu69]. Translated by Laurence Hecht and edited by A. K. T. Assis. Posted in October 2019 at https://www.ifi.unicamp.br/~assis
English translation of Wilhelm Weber's 1849 paper "Bermerkungen zu Neumann's Theorie inducirter Ströme", [Web49]. Translated by Elisabeth Becker-Schmollmann and edited by A. K. T. Assis. Posted in October 2019 at https://www.ifi.unicamp.br/~assis
English translation of J. C. Poggendorff’s 1857 paper "Bemerkung zu dem Aufsatz des Herrn Prof. Kirchhoff", [Pog57]. This paper is related to Kirchhoff’s 1857 paper "On the motion of electricity in wires", [Kir57b] and [Kir57a], and to Weber’s 1864 paper "Electrodynamic measurements particularly with regard to electric oscillations", [Web64]. Kirch...
English translation of Rudolph Kohlrausch and Wilhelm Weber's 1857 paper "Elektrodynamische Maassbestimmungen insbesondere Zurückführung der Stromintensitäts-Messungen auf mechanisches Maass". This paper is the fourth of Weber's eight major Memoirs on Electrodynamic Measurements (Elektrodynamische Maassbestimmungen). Paper translated by D. H. Delph...
Esta é uma tradução ampliada, atualizada e com novas referências do artigo "Arguments in favour of action at a distance" publicado em "Instantaneous Action at a Distance in Modern Physics - 'Pro' and 'Contra'," editado por A. E. Chubykalo, V. Pope e R. Smirnov-Rueda (Nova Science Publishers, Commack, 1999), págs. 45-56, [Ass99]. São apresentados vá...
Russian translation by Arthur Baraov of Volume 2 of the book The Experimental and Historical Foundations of Electricity. This work deals with the most fundamental aspects of physics. The book describes the main experiments and discoveries in the history of electricity. It deals with attractions and repulsions, positive and negative charges, conduct...
Em 1906 Johan Ludvig Heiberg (1854-1928), filólogo e historiador da ciência dinamarquês,
descobriu um texto até então desconhecido de Arquimedes (287-212 a.C.).
Era uma carta endereçada a Eratóstenes (285-194 a.C.), o famoso cientista grego responsável pela grande
Biblioteca de Alexandria e pela medida mais famosa e precisa da antiguidade do rai...
Der vorliegende Text ist eine Übersetzung von Kapitel 1, Seiten 17-101, des Buches Weber’s Planetary Model of the Atom (Hamburg: Tredition Science, 2011), see also O Modelo Planetário de Weber para o Átomo. [Translation in Portuguese] (Montreal: Apeiron Press, 2014). In diesem Buch wird das von Wilhelm Weber (1804-1891) in der zweiten Hälfte des 19...
Esta é uma tradução do artigo “History of the 2.7 K Temperature Prior to Penzias and Wilson” publicado em Apeiron, Volume 2, páginas 79-84 (1995). Apresentamos a história das estimativas da temperatura do espaço intergaláctico. Começamos com os trabalhos de Guillaume e Eddington sobre a temperatura do espaço interestelar devida à luz das estrelas p...
The study of free fall is thoroughly present in physics teaching at all levels. From the point of view of Newtonian dynamics it appears to be extremely simple, as it consists of a two-body problem with a constant force generating a constant acceleration. However, there are several important conceptual subtleties and hidden assumptions involved in t...
Italian translation of the book The Experimental and Historical Foundations of Electricity. Translated by P. Cerreta, A. Cerreta and R. Cerreta. Edited by P. Cerreta, R. Serafini and R. Urigu.
We present some aspects of the work and personality of Halton Christian Arp (1927-2013).
We present some aspects of the work and personality of Halton Christian Arp (1927-2013). We are used to being astonished by beautiful images of galaxies, splen-dorous arrangements of stars, gas and interstellar dust. The Sun and its planetary system are located in one of them, the Milky Way galaxy, a giant spiral galaxy, with the Sun sitting in the...
Weber's electrodynamics is utilized to model superconductivity. We show that it successfully reproduces well known superconducting effects like the London moment, the Meissner effect and the London penetration depth. The calculations presented here have the advantage to include the mass of the free electrons where they belong, namely, in Newton's s...
German translation by Hermann Härtel of the paper “Ampère’s motor: Its history
and the controversies surrounding its working mechanism”, American Journal of Physics, Vol. 80, pp.
990-995 (2012). DOI: 10.1119/1.4736698. Abstract: Im Jahr 1822 erfand Ampère eine neue Art von Motoren, in dem es ihm gelang, einen zylinderförmigen Magneten rotieren zu l...
We consider two models which lead to the prediction of a weight change of gyroscopes depending on the rate of rotation: mass-energy equivalence and Weber's force for gravitation. We calculate the order of magnitude of this effect in both models and show that Weber's model predicts a weight change depending on the spin axis orientation resembling cl...
Italian translation of the book The Illustrated Method of Archimedes: Utilizing the Law of the Lever to Calculate Areas, Volumes and Centers of Gravity (Apeiron, Montreal, 2012).
According to Faraday’s law of induction, when we change the current intensity in a primary electric circuit we can induce a current in a secondary circuit under appropriate conditions. An electric current means charges in motion. Microscopically we can express Faraday’s law by saying that when we accelerate charges in the primary circuit, a force i...
Some experiments have indicated the possible existence of particles with a negative inertial mass. It is shown under which conditions Weber's electrodynamics gives rise to this effect. Some specific experiments related to this aspect of Weber's law are described. Two particles equally
electrified with charges of the same sign would then move toward...
This work contains a complete and commented translation of Ampère's main book (1826): "Théorie des phénomènes électro-dynamiques, uniquement déduite de l'expérience".
Russian translation by Arthur Baraov of the book The Experimental and Historical Foundations of Electricity.
German translation by Manfred Pohl of the paper published in Annales de la Fondation Louis de Broglie, Vol. 29, pp. 149-171 (2004), The principle of the physical proportions. Kurzfassung: Wir postulieren den Grunsatz der physikalischen Grössenverhältnisse, nach dem alle Gesetze der Physik nur vom Verhältnis bekannter Grössen der gleichen Art abhäng...
German translation by Manfred Pohl of the paper published in Journal of Advanced Physics, Vol. 4, pp. 77-82 (2015), Particles with negative mass: production, properties and applications for nuclear fusion and self-acceleration. Kurzfassung: Einige Experimente haben die mögliche Existenz von Partikeln mit einer negativen trägen Masse ergeben. Es ist...
Apresentamos a tradução de um texto de Michael Faraday sobre a indução unipolar.
Apresentamos uma tradução completa para o português, comentada, do artigo de Charles Édouard Guillaume (1861-1928), de 1896, sobre a temperatura do espaço interestelar. O trabalho aqui traduzido é importante por ser a estimativa mais antiga que conhecemos da temperatura adquirida por um corpo que esteja no espaço interestelar distante das outras es...
Este livro apresenta o modelo planetário para o átomo desenvolvido por Wilhelm Weber (1804-1891) na segunda metade do século XIX, antes do modelo de Bohr. Ele é baseado na força eletrodinâmica de Weber de 1846 que depende da distância entre as cargas que estão interagindo, da velocidade relativa entre elas, assim como da aceleração relativa entre e...
Resenha do livro Science and the Citizen: Contemporary Issues and Controversies, M. M. Capria (editor).
German translation by Manfred Pohl of the paper published in Instantanous Action at a Distance in Modern Physics – “Pro” and “Contra”, Edited by A. E. Chubykalo, V. Pope and R. Smirnov-Rueda (Nova Science Publishers, Commak, 1999), pp. 45-56, Arguments in favour of action at a distance. Kurzfassung: Es werden verschiedene Argumente für die unverzög...
Text in memory of Peter Graneau (1921-2014) published in Infinite Energy, Vol. 114, pp. 14-15 (2014).
German translation by H. Härtel of the book The Electric Force of a Current: Weber and the Surface Charges of Resistive Conductors Carrying Steady Currents (Apeiron, Montreal, 2007).
German translation by Manfred Pohl of the paper published in F. Potter (editor), 2nd Crisis in Cosmology Conference, CCC-2 (Astronomical Society of the Pacific, San Francisco, 2009), pp. 255-267. APS Conference Series, Volume 413, ubble’s cosmology: From a finite expanding universe to a static endless universe. Kurzfassung: Wir analysieren die Ansi...
German translation by Manfred Pohl of the paper published in Proceedings of the Natural Philosophy Alliance (Lulu Press, 2011), Volume 8, pp. 36-39 (18th Annual Conference of the NPA, 6-9 July 2011 at the University of Maryland, College Park, USA), Consequences of relational time. Kurzfassung: Es gibt zwei konkurrierende Formulierungen der Zeit in...
German translation by Manfred Pohl of the paper published in Annales de la Fondation Louis de Broglie, Volume 32, pp. 117-120 (2007), Gravitation and cogravitation. Abstract: Buchrezension: "Gravitation and Cogravitation: Developing Newton’s Theory of Gravitation to Its Physical and Mathematical Conclusion," Oleg D. Jefimenko.
German translation by Manfred Pohl of the paper published in Astrophysics and Space Science 227, pp. 13-24, 1995, The redshift revisited. Kurzfassung: Wir analysieren die Geschichte der modernen Kosmologie, basierend auf dem Phänomen der Rotverschiebung und auf der kosmischen Hintergrundstrahlung (CBR). Wir zeigen die Modelle verschiedener Autoren...
German translation by Manfred Pohl of the paper published in Apeiron, Vol. 2, pp. 79-84 (1995), History of the 2.7 K temperature prior to Penzias and Wilson. Kurzfassung: Wir präsentieren die Geschichte der Schätzungen der Temperatur des intergalaktischen Raumes. Wir beginnen mit den Arbeiten von Guillaume und Eddington von der Temperatur des inter...
Ultimamente tem sido publicada uma série de artigos tratando de experiências com ímãs fortemente imantados. Entre eles destaca-se o motor de Ampère, denominado também de motor homopolar ou unipolar. Este motor pode ser facilmente reproduzido em sala de aula. Ele apresenta um fenômeno de rotação contínua intrigante e sua história carrega um debate a...
Tradução do artigo "The redshift revisited," de A. K. T. Assis e M. C. D. Neves, publicado em Astrophysics and Space Science, Volume 227, pp. 13-24 (1995). Este artigo também foi publicado em inglês em Plasma Astrophysics and Cosmology, A. L. Peratt (ed.), (Kluwer Academic Publishers, Dordrecht, 1995), pp. 13-24. Assunto: Analisamos a história da c...
Esta é a tradução da segunda e última parte do texto de Arquimedes sobre os corpos flutuantes. A primeira parte deste texto está publicada na Revista da Sociedade Brasileira de História da Ciência, v. 16, p. 69-80, 1996. Nesta segunda parte, Arquimedes discute as condições de equilíbrio para um paraboloide de revolução flutuando em um líquido.
In 1822 Ampère created a new kind of motor when he succeeded in
spinning a cylindrical magnet around its axis by connecting it to a
battery generating a steady current. Nowadays, it is easy to present
such a motor in the classroom utilizing a neodymium magnet, a D battery,
a steel nail, and a short piece of copper wire. Although it is very
simple t...
Archimedes calculated the centre of gravity of the cone but the proof of this theorem is not extant in his works. Knorr made a reconstruction of this proof utilizing geometrical arguments. This paper proves this theorem by means of a physical demonstration utilizing the law of the lever, and by adapting from Archimedes the method of mechanical theo...
We present the main aspects of Weber’s electrodynamics and of Maxwell’s equations. We discuss Maxwell’s point of view related to Weber’s electrodynamics. We compare Weber’s force with Lorentz’s force. We analyse the relation between Weber’s law and Maxwell’s equations. Finally, we discuss some experiments performed and proposed with which we can di...
Livro disponível gratuitamente em formato PDF em (book freely available in PDF format at): http://www.culturaacademica.com.br/catalogo-detalhe.asp?ctl_id=354
Assis, Andre Koch Torres; Wiederkehr, Karl Heinrich
and Gudrun Wolfschmidt:
Weber's Planetary Model of the Atom.
Ed. by Gudrun Wolfschmidt.
Hamburg: tredition science (Nuncius Hamburgensis -
Beiträge zur Geschichte der Naturwissenschaften; Band 19) 2011.
(ISBN 978-3-8424-0241-6) (184 Seiten, 11 Farbseiten).
Weber's Planetary Model of the Atom_Assis+Wolfschmidt+Wiederkehr-2011_Nuncius-19
Short Abstract (< 60 words): We analyze Hubble's approach to cos-mology. In 1929 he accepted a finite expanding universe in order to explain the redshifts of distant galaxies. Later on he turned to an infinite stationary universe due to observational constraints. We show, by quoting his works, that he remained cautiously against the big bang until...
We demonstrate the equivalence for the self-inductance of closed circuits, with the formulas of Neumann, Weber, Maxwell, and Graneau.
This book presents the planetary model of the atom developed by Wilhelm Weber (1804-1891) in the second half of the XIXth century, before Bohr's model. It is based on Weber's electrodynamic force of 1846, which depends on the distance between the interacting charges, their relative velocity and their relative acceleration. Weber showed that two int...
We consider one aspect of Isaac Newton’s thinking as regards science. He always considered the inverse aspects of any problem. We illustrate his approach in many areas of knowledge. In philosophy of science with the roles of analysis and synthesis. In mechanics with the law gravitation. In optics with the decomposition of while light and its compos...
This book contains a complete and commented Portuguese translation of Ampère's main work on electrodynamics (1826): Théorie des phénomènes électro-dynamiques, uniquement déduite de l'expérience.
There are two competing formulations of time in physics. Newton defended in the Principia the utilization of absolute time which, according to him "flows equably without relation to anything external." Leibniz, on the other hand, was against this concept and proposed relative time to replace it: “As for my opinion, I have said more than once, that...
We present a list of the works and letters of Wilhelm E. Weber (1804-1891) which have been translated into English.
Two theoretical explanations are given about the working system
of Roberval’s balance and also of an interesting variation of it.
We analyze the views of Edwin Hubble (1889-1953) as regards the large scale structure of the universe. In 1929 he initially accepted a finite expanding universe in order to explain the redshifts of distant galaxies. Later on he turned to an infinite stationary universe and a new principle of nature in order to explain the same phenomena. Initially,...
Apresentamos a tradução comentada da segunda parte da primeira obra de A. M. Ampère sobre os fenômenos eletrodinâmicos. Nesse artigo Ampère descreve suas observações da ação entre correntes elétricas e suas conseqüências qualitativas.
We discuss the controversy about the demonstration of the law of the lever as given by Archimedes. One aspect of the discussion concentrates on the meaning of the postulates which he utilized. We analyze what consequences would arise if nature behaved in such a way that the lever followed a generalized power law. In particular, we consider the case...
