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Time and Fermions:General Covariance vs.Ockham's Razor for Spinors
spinor fermion general covariance geometric object nonlinear group realization conventionality of simultaneity Schwarzschild solution
2016/6/15
It is a commonplace in the foundations of physics, attributed to Kretschmann, that any local physical theory can be represented using arbitrary coordinates, simply by using tensor calculus. On the oth...
The paper develops a theory of branching spatiotemporal histories that accommodates indeterminism and the insights of general relativity. A model of this theory can be viewed as a collection of overla...
Why Einstein did not believe that General Relativity geometrizes gravity
General Relativity Einstein Geometrization Unification Inertia Gravity Geodesic Equation Meyerson
2016/6/14
I argue that, contrary to folklore, Einstein never really cared for geometrizing the gravitational or (subsequently) the electromagnetic field; indeed, he thought that the very statement that General ...
Geodesic Universality in General Relativity
Geodesic Universality Idealization Relativity Theory Einstein
2016/5/31
According to (Tamir, 2012), the geodesic principle strictly interpreted is compatible with Einstein’s field equations only in pathologically unstable circumstances and, hence, cannot play a fundamenta...
Essay Review of David Malament,Topics in the Foundations of General Relativity and Newtonian Gravitation Theory
general relativity Newtonian gravitation theory
2016/5/30
Essay Review of David Malament,Topics in the Foundations of General Relativity and Newtonian Gravitation Theory.
Similarity Assessments,Spacetime,and the Gravitational Field:What Does the Metric Tensor Represent in General Relativity?
general relativity metric tensor similarity-based reasoning
2016/5/30
In this paper I explore the dialectics underlying the choice between a geometrical and a field interpretation of the metric tensor gab in general relativity. My aim is to examine the role of a specifi...
General Covariance and Background Independence in Quantum Gravity
general covariance background independence quantum gravity string theory loop quantum gravity spin foam models
2016/5/27
The history of general relativity suggests that in absence of experi-mental data, constructing a theory on philosophical first principles can lead to a very useful theory as well as to ground-breaking...
A logic road from special to general relativity
first-order logic axiomatization foundation of relativity theory
2016/5/27
We present a streamlined axiom system of special relativity in first-order logic. From this axiom system we ``derive'' an axiom system of general relativity in two natural steps. We will also see how ...
Leibniz Equivalence. On Leibniz's (Bad) Influence on the Logical Empiricist Interpretation of General Relativity
Gottfried Wilhelm Leibniz Logical Empiricism Philosophical interpretations of General Relativity Point-coincindence argument Hole Argument Indiscernibility arguments Felix Hausdorff Hermann Wey
2011/9/8
Einstein抯 損oint-coincidence argument'?as a response to the 揾ole argument?is usually considered as an expression of 揕eibniz equivalence,?a restatement of indiscernibility in the sense of Leibniz. Throu...
Flavour-Oscillation Clocks and the Geometricity of General Relativity
general relativity geometry clocks
2009/11/20
I look at the ‘flavour-oscillation clocks’ proposed by D.V. Ahluwalia,
and two arguments of his suggesting that such clocks might behave in a way
that threatens the geometricity of general relativit...
General Relativity Needs No Interpretation
general relativity intepretation quantum gravity
2009/6/4
I argue that, contrary to the recent claims of physicists and
philosophers of physics, general relativity requires no
interpretation in any substantive sense of the term. I canvass the
common reaso...
Within the context of general relativity, we consider one definition of a 'time machine' proposed by Earman, Smeenk, and Wuthrich (2009). They conjecture that, under under their definition, the class ...
An eight-year follow-up national study of medical school and general hospital ethics committees in Japan
general hospital ethics committees
2008/11/13
Background
Ethics committees and their system of research protocol peer-review are currently used worldwide. To ensure an international standard for research ethics and safety, however, data is neede...
Survey of the general public's attitudes toward advance directives in Japan: How to respect patients' preferences
patients' preferences Japan
2008/11/12
Background
Japanese people have become increasingly interested in the expression and enhancement of their individual autonomy in medical decisions made regarding medical treatment at and toward the e...
Disclosure of cancer diagnosis and prognosis: a survey of the general public's attitudes toward doctors and family holding discretionary powers
discretionary powers doctors family
2008/11/10
Background
This study aimed to ask a sample of the general population about their preferences regarding doctors holding discretionary powers in relation to disclosing cancer diagnosis and prognosis.
...