Is Electromagnetic Field Momentum Due to the Flow of Field Energy?Conservation laws that are based on the divergence of a second-rank four-tensor are fundamentally different from conservation laws based on the divergence of a four-vector. This article investigates…Oliver Davis Johns·May 11, 2021SaveLearn
A translation of the paper: On the question of avoiding the infinite "self-reaction" of the electron, by V. Ambarzumian and D. Ivanenko (1930)An attempt is made to avoid the difficulty of the infinite reaction of the electron on itself, which occurs in quantum electrodynamics, by introducing difference equations instead of differential…Pascal Marquet·May 10, 2021SaveLearn
A translation of L. Euler's "On the motion of comets in parabolic orbits, having the Sun in the focus"This is a translation from Latin of E840 'De motu cometarum in orbitis parabolicis, solem in foco habentibus', in which Euler addresses six problems related to comets in heliocentric parabolic…Sylvio R Bistafa·May 7, 2021SaveLearn
Karl Schwarzschild, Annie J. Cannon, and Cornelis Easton: PhDs honoris causa of Jacobus C. KapteynHonorary degrees and particularly doctorates are important instruments to enhance the standing of universities and professors, in addition to receiving these as a measure of a scientist's…Pieter C. van der Kruit·May 4, 2021SaveLearn
Dark matter in Actor-Network Theory context (La materia oscura en el contexto de la teor\'ia del actor-red)The aim of this work is to use some categories of Actor-Network Theory (ANT) developed by Bruno Latour in the book Reassembling the Social -- An Introduction to Actor-Network Theory to analyze a…Facundo Rodriguez·Apr 28, 2021SaveLearn
A translation of L. Euler's "An easy method for calculating the motion of celestial bodies perturbed in any manner avoiding astronomical computations"This is a translation from Latin of E348 'Methodus facilis motus corporum coelestium utcunque perturbatos ad rationem calculi astronomici revocandi', in which Euler develops a method to alleviate the…Sylvio R Bistafa·Apr 28, 2021SaveLearn
A translation of G.W. Krafft's "On a new class of oscillations"This is a translation from Latin of 'De novo oscillationum genere', which was motivated by Krafft's accidental observation of a suspended clock setting itself in constant motion as a pendulum. This…Sylvio R Bistafa·Apr 28, 2021SaveLearn
A translation of L. Euler's "On a new class of oscillations"This is an annotated translation of E126 'De novo genere oscillationum', in which Euler derived for the first time, the differential equation of the (undamped) simple harmonic oscillator under…Sylvio R Bistafa·Apr 28, 2021SaveLearn
Translation of Newton's Principia into Arabic Under the Aegis of the East India Company: A Rumour Turning into a Myth?Tafazzul Husain Khan (1727?--1800?), who began his career in the court of Awadh, spent the last two decades of his life as a trusted ally of the East India Company. What set him apart from other…K. Razi Naqvi·Apr 27, 2021SaveLearn
A translation of L. Euler's "On the rectilinear motion of three bodies mutually attracting each other"This is an annotated translation from Latin of E327 'De motu rectilineo trium corporum se mutuo attrahentium'. In this publication, Euler considers three bodies lying on a straight line, which are…Sylvio R Bistafa·Apr 26, 2021SaveLearn
A translation of L. Euler's "Considerations on the motion of celestial bodies"Euler wrote several papers on Astronomy, most of them in Latin. This is a commented translation of E304 'Considerationes de motu corporum coelestium' (Considerations on the motion of celestial…Sylvio R Bistafa·Apr 24, 2021SaveLearn
A translation of L. Euler's "Simple determination of the orbit of a comet, when it is possible to observe its passage across the ecliptic twice"This is the translation from Latin of E547 'Determinatio facilis orbitae cometae, cuius transitum per eclipticam bis observare licuit', in which Euler addresses the determination of a comet's…Sylvio R Bistafa·Apr 24, 2021SaveLearn
Cuando la ortodoxia no es lo m\'as relevante: el paisaje de La Gomera y la orientaci\'on de sus iglesiasWe present a study of the relationship between astronomy and landscape centered on the orientation of Christian churches of the island of La Gomera, located in the Canary Archipelago. The fieldwork…Adrian Di Paolo, Alejandro Gangui, Juan Antonio Belmonte et al.·Apr 22, 2021SaveLearn
The Mereology of Thermodynamic EquilibriumThe special composition question (SCQ), which asks under which conditions objects compose a further object, establishes a central debate in modern metaphysics. Recent successes of inductive…Michael te Vrugt·Apr 22, 2021SaveLearn
Do Robots powered by a Quantum Processor have the Freedom to swerve?Any scientific attempt to explain consciousness is tasked with reconciling the third person objective perspective of science with our first person subjective experience of the world. A good point of…Hartmut Neven, Peter Read, Tobias Rees·Apr 22, 2021SaveLearn
Conflicts Between Science and Religion: Epistemology to the RescueBoth Albert Einstein and Erwin Schr\"odinger have defined what science is. Einstein includes not only physics, but also all natural sciences dealing with both organic and inorganic processes in his…Moorad Alexanian·Apr 21, 2021SaveLearn
History of Prime Movers and Future ImplicationsMotive and electrical energy has played a crucial role in human civilization. Since Ancient times, motive energy played a primary role in agricultural and industrial production as well as…Mikhail Shubov·Apr 19, 2021SaveLearn
Physics as the science of the possible: Discovery in the age of Godel (1.1 Generality of physics)This book represents a continuation, an elaboration, and possibly a clear explanation of the ideas which were expounded in the previous book Time and Methods in Environmental Interfaces Modeling…Dragutin Mihailovic, Darko Kapor, Sinisa Crvenkovic et al.·Apr 17, 2021SaveLearn
The Universal Evolution and the Origin of LIfeThe origin of life occupies a very important place in the study of the evolution. Its liminal location between life and non-life poses special challenges to researchers who study this subject.…Gennady Shkliarevsky·Apr 13, 2021SaveLearn
Localizable Particles in the Classical Limit of Quantum Field TheoryA number of arguments purport to show that quantum field theory cannot be given an interpretation in terms of localizable particles. We show, in light of such arguments, that the classical $…Benjamin H. Feintzeig, Jonah Librande, Rory Soiffer·Apr 13, 2021SaveLearn
The Trouble with "Puddle Thinking": A User's Guide to the Anthropic PrincipleAre some cosmologists trying to return human beings to the centre of the cosmos? In the view of some critics, the so-called "anthropic principle" is a desperate attempt to salvage a scrap of dignity…Geraint F. Lewis, Luke A. Barnes·Apr 7, 2021SaveLearn
Specular Reflection from the Great Pyramid at GizaThe pyramids of ancient Egypt are said to have shone brilliantly in the sun. Surfaces of polished limestone would not only have reflected diffusely in all directions, but would also likely have…Donald E. Jennings·Apr 6, 2021SaveLearn
History of Astronomy in Australia: Big-Impact Astronomy from World War II until the Lunar Landing (1945-1969)Radio astronomy commenced in earnest after World War II, with Australia keenly engaged through the Council for Scientific and Industrial Research. At this juncture, Australia's Commonwealth Solar…Alister W. Graham, Katherine H. Kenyon, Lochlan J. Bull et al.·Apr 2, 2021SaveLearn
Comprendre l atmosphere du Soleil et celles des etoiles variables a la fin du 19e siecle or, Understanding the Sun and variable stars atmospheres at the end of the 19th CenturyGuy Boistel questions the Sun / variable stars analogy at the heart of the work of Dutch astronomer Albert Brester. The problem of interdisciplinarity appears in the objectification of the Sun at the…Guy Boistel·Mar 31, 2021SaveLearn
Noether's Theorems and Energy in General RelativityThis paper has three main aims: first, to give a pedagogical introduction to Noether's two theorems and their implications for energy conservation in general relativity, which was a central point of…Sebastian De Haro·Mar 31, 2021SaveLearn