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Dr. David F. Roscoe
local time: 2021-09-27 13:17 (+00:00 )
Dr. David F. Roscoe (Abstracts)
Titles Abstracts Details
  • Gravitation as a Self-Movement of Matter Due to the Exchange of Gravitons (2009) [Updated 4 years ago]

    This paper presents a theory on the mechanics behind the locomotive force of gravitation, attributing it to a well-established attribute common to all matter: the radiant emission of energy. The relationship between the gravitational force and its particulate carrier is established and a self-consistent description is provided to explain how these particles result in apparent attraction. These mechanics also reveal a causal explanation for inertia and the apparent equivalence of gravitational and inertial mass. Finally, it is shown that both the classical and quantum behaviors of gravitation can be described by these mechanics, without modification. Recent experimental results published by the ARCS group led by Dr. M. Tajmar [M. Tajmar, F. Plesescu, B. Seifert, and K. Marhold, arXiv:gr-qc/0610015v3] defy explanation within general relativity, but find possible explanation within this paper. If these results are confirmed, Dr. Tajmar's results lend experimental support to this hypothesis.


  • Maxwell's Equations: New Light on Old Problems (2006) [Updated 1 decade ago]
    by David F. Roscoe   read the paper:

    Maxwell's equations possess a certain generic structural property which is well-known, but rarely discussed. By considering this property as primary, we are able to derive the complete mathematical structure of Maxwell's equations described in terms of the orthogonality properties defined between certain spaces of linear operators. But, we find that the classical theory, whilst recovered intact here, is incomplete in the sense that the recovered Maxwell field is irreducibly associated with an additional massive vector field. In the overall context, this massive vector field can only be interpreted as a manifestation of a classical massive photon. One immediate consequence is that the Lorentz force law must be generalized and can be trivially made perfectly Newtonian once the massive vector field is accounted for.


  • A Perspective on Mach's Principle and the Consequent Discovery of Major New Phenomenology in Spiral Discs (2005) [Updated 4 years ago]

    Chapter 7 of Immediate Distant Action, this essay discusses Mach-Principle as it relates to rotating systems.

    Sections:

    1. Intorduction 169
    2. General overview 171
    3. The starting point 173
    4. The end point 174
    5. A quasi-fractal mass distribution law, M ~ R2: the evidence 174
    6. Gravitating systems 176
    7. Spiral galaxies 176
    8. The discreet states phenomenolgy: hypothesis 178
    9. The discreet states phenomenolgy: results 179
    10. Comments 182
    11. What does it mean? 182
    12. Conclusions 183

  • A Perspective on Mach's Principle and the Consequent Discovery of Major New Phenomenology in Spiral Discs (2002) [Updated 1 decade ago]

  • An Experimental Confirmation of Longitudinal Electrodynamic Forces (2001) [Updated 1 decade ago]

  • An Analysis of 900 Rotation Curves of Southern Sky Spiral Galaxies: Are the Dynamics Constrained to Discrete States? (1997) [Updated 1 decade ago]

    One of the largest rotation curve data bases of spiral galaxies currently available is that provided by Persic and Salucci (1995; hereafter, PS) which has been derived by them from unreduced rotation curve data of which has been derived by them from unreduced rotation curve data of which has been derived by them from unreduced rotation curve data of 965 southern sky spirals obtained by Mathewson, Ford and Buchhorn (1992; hereafter, MFB). Of the original sample of 965 galaxies, the observations on 900 were considered by PS to be good enough for rotation curve studies, and the present analysis concerns itself with these 900 rotation curves.

    The analysis is performed within the context of the hypothesis that velocity fields within spiral discs can be described by generalized power-laws. Rotation curve data is found to impose an extremely strong and detailed correlation between the free parameters of the power-law model, and this correlation accounts for virtually all the variation in the pivotal diagram. In the process, the analysis reveals completely unexpected structure which indicates that galactic dynamics are constrained to discrete states.


  • A Fractal Universe with Discrete Spatial Scales: In Memory of Toivo Jaakkola (1996) [Updated 4 years ago]
    by David F. Roscoe   read the paper:

    The work of this paper is based on work which has been described in a preliminary form elsewhere (Roscoe 1995), and it applies the formalism developed there to the problem of deriving the cosmology for a universe which is in a state of gravitational equilibrium. It predicts that, in such a universe, material is distributed in a fractal fashion with fractal dimension whilst redshifts necessarily occur in integer multiples of a basic unit and, given a certain model for light propagation, the measured magnitudes of peculiar velocities will increase in direct proportion to cosmological redshift.

    The first of these predictions is strongly supported by the results of the most modern pencil-beam and wide-angle surveys, whilst the second conforms with the results of very recent rigorous analyses of accurately measured redshifts of nearby spiral galaxies and the third is in qualitative agreement with the very limited data available. The observational support for these predictions is described in detail in the text.


  • Galilean Metric Gravity (1995) [Updated 1 decade ago]
    by David F. Roscoe   read the paper:

    The pressure of empirical circumstance has led to the consensus that theories of gravitation must almost certainly be metric theories if they are to be successful, and the modern perception is that such metric theories can only have meaning within the general context of space-time physics with its associated concepts of curved space-time manifolds. However, this latter perception, where it exists, is rooted in the historical development of the subject and is not informed by any empirical circumstance. Correspondingly, the immediate purpose of the presented paper is to show that metric gravity, as a general concept, is implicitly contained in the idea of the momentum-conserving interaction and is independent of all additional concepts; this, of course, implies that concepts of curved space-time manifolds are strictly superfluous to the function of describing gravitational physics. The basic idea is realizable within the context of either Newtonian mechanics in Galilean space and time or Einstein's relativistic mechanics in Lorentzian space-time, and is illustrated here for the physics of Galileo and Newton; in particular, it is shown how Newton's universal theory of gravitation arises as a special case of this analysis.


  • Gravity is the Simplest Thing! (1994) [Updated 1 decade ago]

    The General Theory of Relativity (GR) is one of the best tested of modern physical theories, and has proved its superiority over rival theories many times during the past seventy years in the arena of the critical observation; in particular, the binary pulsar observations have recently proved decisive in this context, leaving GR as almost the only credible theory available. See Will1 for a comprehensive discussion. As a consequence of these circumstances, it is easy to understand why, within the narrow context of purely gravitational phenomena, GR is considered to be securely founded. The only obvious problem facing the theory is the apparent difficulty of reconciling the gravitational force (as understood within the context of GR) with the three other forces of nature, as these are understood within their respective theoretical contexts; as a measure of this difficulty, we can reflect that, although a huge effort has been expended in the attempt to effect such a reconciliation - particularly over the past fifteen or twenty years - it is still not clear that it is possible even in principle. In view of this uncertainty, it would seem prudent to invest a modest effort towards a continued questioning of the theoretical basis of gravitation theory, and this paper is intended to represent such an effort.


  • A Formulation of Galilean Gravitation on a Maniford (1993) [Updated 1 decade ago]

    This paper, which follows [1], presents the formal structure of a Galilean theory of gravitation which is "maximally simple," in the sense of it being impossible to formulate a Galilean invariant theory making fewer a priori statements about the world; specifically, the conservation of linear momentum is assumed, and gravitational trajectories are assumed to be those trajectories which are independent of measured mass properties. 


  • Galilean Gravitation: Solar System Orbits (1993) [Updated 1 decade ago]

    The formalism obtained in [2] was defined up to a scalar field. This paper indicates how to fix this field in an approximate manner and apply the resulting approximately defined formalism to calculate orbital periods of solar system planets.


  • On the Nature of Newtonian Gravitation (1993) [Updated 1 decade ago]

    This paper is the first of three which, taken together, argue that except for a chance event - the early death of Hertz at the turn of the Century - the development of 20th century physics might have been quite different from its actual development. In particular, it will be suggested that curved spacetime gravitational physics would never have been formulated, being replaced, instead by formalisms describing gravitational action within which, ultimately, a conventional quantization would have been a relatively routine process. This first paper effectively sets the scene for these developments.


  • The Equivalence Principle as a Consequence of the Third Law (1992) [Updated 4 years ago]
    by David F. Roscoe   read the paper:

    One of the enduring mystries of classical and modern physics arises from the fact that the value obtained for the gravitational-mass ratio of two particles compared in a weighing experiment is identical to the value obtained for the inertial-mass ratio of the same two particles compared in a collision experimetn (to within experimental error).  For this reason we speak of the equivalence between inertial and gravitational mass, and tend  to use the concepts interchangeably.  However, whilst practitioners of science and engineering have been content to accept this equivalence as a matter of fact, there has, until recently, been no rational understanding of it.  However, recently, Ghosh, Assis and I have each given the basis for such an understanding.


  • A Geometric Representation of Inertial Process (1991) [Updated 1 decade ago]

    This paper presents a study of "inertia" which is motivated by a simple argument showing that the concept of inertial mass is somehow prior to the concept of gravitational mass so that, ultimately, it might be expected that gravitational proces arises out of inertial process.      The analysis starts with an explicit recognition of the fact that Newton's Third "Law" only has lawlike content when used to describe particle dynamics involving collisions between five or more massive particles, functioning purely as a definition of inertial mass in collisions involving four or less massive particles.      This recognition points the way to a relativistic generalization in which it is found that an appropriate consideration of the relationship between the concept of relativistic inertial mass (rest mass), and the law of four-momentum conservation, leads to a natural twofold partition of the class of all relativistic collision processes into those which are, in our own terminology, inertially-determined processes, and the rest.       It is found that the "inertially-determined process" can be given a geometric representation with a formal structure which suggests that gravitation might be a particular case of such a process and therefore, as argued in the first instance, a phenomenon of inertia.


  • Gravitation as an Inertial Disturbance (1991) [Updated 1 decade ago]

    In [1], the class of all collisions between massive particles was analyzed to show that this class could be partitioned into those collisions involving four particles, or less       the subclass of so-called "inertially determined collisions"       and the rest, and it was subsequently shown that the inertially determined collisions could be given a representation in terms of the geometry on a collision manifold. In the present paper, it is shown that this collision manifold geometry supports inertial processes which cannot be distinguished from gravitational processes, up to and including those associated with the binary pulsar       the most extreme accepted test of a gravitation theory. In effect, the analysis shows that gravitational process can be consistently considered as a special case of inertial process, so that the enduring mystery of the equivalence between gravitational and inertial mass can be finally understood. Significant consequences of gravitation-from-inertial mass can be finally understood. Significant consequences of gravitation-from-inertia (GFI) are: concepts of curved space-times are redundant to gravitational physics; the essential singularities at gravitational origins, which are features of both Newtonian gravitation and GR, do not exist; gravitational process becomes a particle/particle interaction of the conventional kind.


  • Gravitation as an Inertial Process (1988) [Updated 4 years ago]
    by David F. Roscoe   read the paper:

    According to our common experience all our useful concepts of space and time are absolutely correlated with the existence and evolution of matter. This statement represents a qualitative definition of the strong interpretation of Mach's Principle (SIMP), and the primary purpose of the presented paper is to derive a formal quantitative expression of it. This purpose is achieved by a careful consideration of the "inertial" concept, and the resulting formalism is a description of inertial processes given in terms of relations between our concepts of spacetime and our concepts of inertial matter. Thus, for example, the formalism suggests an understanding of the origin of "inertial forces", which is directly analogous to our understanding of the electromagnetic force exerted on charged particles by electromagnetic fields.