Absolute or Relative Motion? A Study from the Machian Point of View of the Discovery and the Structure of Dynamical Theories. Volume 1, The Discovery of Dynamics

1991 ◽  
Vol 59 (8) ◽  
pp. 765-767
Author(s):  
Julian B. Barbour ◽  
Robert DiSalle
Keyword(s):  
Relative Motion ◽  
Point Of View

The Problem of Relativity in reference to several bodies

1926 ◽  
Vol 23 (3) ◽  
pp. 191-197
Author(s):  
R. Hargreaves
Keyword(s):  
Relative Motion ◽  
Point Of View ◽  
Image Position ◽  
Primary Form

§ 1. If the kinetic potential for the relative motion of two masses is written with an added constant asa close connexion with the relativity quadratic appears. The latter is in factwhere a modification of the primary formwhich shows an unaltered determinant. The condition in respect to the determinant, suggested, I believe, by Schwarzschild, is one which to me appears to give the most significant form to the results. From the dynamical standpoint we may regard it as imposing a counterpoise in the inertia coefficients to the modification introduced by the potential; or from a geometrical point of view we may regard it as minimizing the departure from the normal use of coordinates. An illuminating example of the loss of meaning that accompanies transformation in which this condition is disregarded is furnished by the isotropic form which is sometimes given to Einstein's quadratic.

Formulas for Entraining Velocity in Lubricated Line Contacts

2002 ◽  
Vol 124 (4) ◽  
pp. 856-858
Author(s):  
Enrico Ciulli
Keyword(s):  
Relative Motion ◽  
Physical Meaning ◽  
Point Of View ◽  
Lubricated Contacts ◽  
Line Contacts ◽  
Two Bodies

The knowledge of the entraining velocity is necessary for the investigation of lubricated contacts. The entraining velocity is the average of the surface velocities of the two bodies in contact relative to the contact itself; its estimation can be actually not always immediate. In this work the general case of two pairing cylindrical surfaces in planar relative motion is analyzed from a kinematical point of view. Formulas for the evaluation of the entraining velocity are presented that are directly applicable to any case of connected members of a mechanism. The physical meaning of the terms of the proposed formulas is also briefly investigated from a lubrication point of view.

The Contribution of Tribology to the Development and Operation of Railways

1973 ◽  
Vol 187 (1) ◽  
pp. 1-16
Author(s):  
F. T. Barwell
Keyword(s):  
Recent Work ◽  
Relative Motion ◽  
Point Of View ◽  
Design Considerations ◽  
Electrified Railway

The contribution of the railway pioneers to the development and practice of tribology is reviewed, and it is contended that the engineers who had learned their craft on the steam locomotive were well equipped to tackle the sometimes more exacting tribological requirements occasioned by railway modernization. Steam cylinder lubrication is instanced as an example of the importance of ‘off design’ considerations and of the contribution, either helpful or unhelpful, made by those responsible for the operation of equipment. The numerous locations within a modern electrified railway wherein surfaces interact in relative motion are listed and discussed from the point of view of reduction in maintenance and enhancement of reliability. In particular, recent work on adhesion between wheel and rail is reviewed.

scholarly journals Dynamically and thermally nonequilibrium fluctuation-electromagnetic interactions: Recent results and trends

2020 ◽  
Vol 35 (03) ◽  
pp. 2040013
Author(s):  
George Dedkov ◽  
Arthur Kyasov
Keyword(s):  
Relative Motion ◽  
Small Particle ◽  
Thick Plate ◽  
Point Of View ◽  
Thick Plates ◽  
Physical Systems ◽  
Electromagnetic Interactions ◽  
Different Temperatures ◽  
Nonequilibrium Fluctuation ◽  
Theoretical Developments

Our recent theoretical developments related to the nonrelativistic and relativistic fluctuation-electromagnetic interactions of bodies with different temperatures moving translationally and (or) rotationally relative to each other are briefly summarized. Three basic geometrical configurations and physical systems are discussed: “a small particle and a thick plate” (i); “a small particle in a radiative vacuum background” (ii) and “two thick plates in relative motion” (iii) — classical Casimir-Lifshitz configuration with allowance for relative motion and different temperatures of plates. For configuration 3, it is shown that the theory of friction and heat exchange by Levin-Polevoi-Rytov proves to be quite adequate contrary to the settled point of view of many authors.

The Contribution of Tribology to the Development and Operation of Railways

1973 ◽  
Vol 187 (1) ◽  
pp. 1-16
Author(s):  
F. T. Barwell
Keyword(s):  
Recent Work ◽  
Relative Motion ◽  
Point Of View ◽  
Design Considerations ◽  
Electrified Railway

The contribution of the railway pioneers to the development and practice of tribology is reviewed, and it is contended that the engineers who had learned their craft on the steam locomotive were well equipped to tackle the sometimes more exacting tribological requirements occasioned by railway modernization. Steam cylinder lubrication is instanced as an example of the importance of ‘off design’ considerations and of the contribution, either helpful or unhelpful, made by those responsible for the operation of equipment. The numerous locations within a modern electrified railway wherein surfaces interact in relative motion are listed and discussed from the point of view of reduction in maintenance and enhancement of reliability. In particular, recent work on adhesion between wheel and rail is reviewed.

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