Four-Dimensional Twisted Group Lattices

Four-dimensional twisted group lattices are used as models for space-time structure. Compared to other attempts at space-time deformation, they have two main advantages: They have a physical interpretation and there is no difficulty in putting field theories on these structures. We present and discuss ordinary and gauge theories on twisted group lattices. We solve the free field theory case by finding all the irreducible representations. The non-abelian gauge theory on the two-dimensional twisted group lattice is also solved. On twisted group lattices, continuous space-time translational and rotational symmetries are replaced by discrete counterparts. We discuss these symmetries in detail. Four-dimensional twisted group lattices can also be used as models for non-trivial discrete compactifactions of certain ten-dimensional spaces.Comment: 31 pages (no figures) in Late

Analysis of Injectivity Decline in some Deepwater Water Injectors

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A Semantic Model for Federated Queries Over a Normalized Corpus

We present here a model implemented in OWL which improves information retrieval and data integration of the corpus. The model is populated with entities from CALBC and some simple queries over it are presented.
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The Kuhnian mode of HPS

In this article I argue that a methodological challenge to an integrated history and philosophy of science approach put forth by Ron Giere almost forty years ago can be met by what I call the Kuhnian mode of History and Philosophy of Science (HPS). Although in the Kuhnian mode of HPS norms about science are motivated by historical facts about scientific practice, the justifiers of the constructed norms are not historical facts. The Kuhnian mode of HPS therefore evades the naturalistic fallacy which Giere’s challenge is a version of. Against the backdrop of a discussion of Laudan’s normative naturalism I argue that the Kuhnian mode of HPS is a superior form of naturalism which establishes contact to the practice of science without making itself dependent on its contingencies

Rational Internalism

I describe and motivate Rational Internalism, a principle concerning the relationship between motivating reasons (which explain actions) and normative reasons (which justify actions). I use this principle to construct a novel argument against Objectivist theories of normative reasons, which hold that facts about normative reasons can be analyzed in terms of an independently specified class of normative or evaluative facts. I then argue for an alternative theory of normative reasons, the Reasoning View, which is consistent with both Rational Internalism and one standard motivation for Objectivism

Legislative Alert: Nomination of Goodwin Liu

[Excerpt] I am writing on behalf of the AFL-CIO in support of the nomination of Professor Goodwin Liu to the U.S. Court of Appeals for the Ninth Circuit. Professor Liu is extraordinarily well-qualified and I urge you to vote for cloture, and to vote for his confirmation