H.L.A. Hart’s "The concept of law" and the moderate indeterminacy thesis reconsidered

In this article the author, in the context of the fiftieth anniversary of H.L.A. Hart’s “The Concept of Law”, reconsiders the moderate indeterminacy of law thesis, which derives from the open texture of language. For that purpose, he intends: first, to analyze Hart’s moderate indeterminacy thesis, i.e. determinacy in “easy cases” and indeterminacy in “hard cases”, which resembles Aristotle’s "doctrine of the mean"; second, to criticize his moderate indeterminacy thesis as failing to embody the virtues of a center in between the vices of the extremes, by insisting that the exercise of discretion required constitutes an “interstitial” legislation; and, third, to reorganize an argument for a truly “mean” position, which requires a form of weak interpretative discretion, instead of a strong legislative discretion

Strengthening and Preserving Family is Essential to America\u27s Future

This editorial provides an overview of how the articles in this issue contextualize the wide-range of perceptions and practices that support (and sometimes undermine) family strengths. Data on the challenges facing today’s families are presented

Ecological Finitude as Ontological Finitude: Radical Hope in the Anthropocene

The proposal that the earth has entered a new epoch called “the Anthropocene” has touched a nerve . One unsettling part of having our ecological finitude thrust upon us with the term “Anthropocene” is that, as Nietzsche said of the death of God, we ourselves are supposed to be the collective doer responsible here, yet this is a deed which no one individual meant to do and whose implications no one fully comprehends. For the pessimists about humanity, the implications seem rather straightforward: humanity will die. Yet, as we will explore in this paper, the death that we may be facing cannot be assumed to be simply biological death or extinction. Indeed, even if we are not running headlong into a mass extinction and biological demise, we do seem to be facing an ontological death. Our ecological finitude is the harbinger of our ontological finitude. The vulnerability we confront in the Anthropocene is what Jonathan Lear, in a different context, called ontological vulnerability. Worlds die too; the ways of life they sustain can become impossible, ceasing to make sense and matter. The constitutive susceptibility of all human worlds to their eventual collapse is what we mean by ontological finitude. This is what we face as presumed denizens in a dawning Anthropocene

Computability of the causal boundary by using isocausality

Recently, a new viewpoint on the classical c-boundary in Mathematical Relativity has been developed, the relations of this boundary with the conformal one and other classical boundaries have been analyzed, and its computation in some classes of spacetimes, as the standard stationary ones, has been carried out. In the present paper, we consider the notion of isocausality given by Garc\'ia-Parrado and Senovilla, and introduce a framework to carry out isocausal comparisons with standard stationary spacetimes. As a consequence, the qualitative behavior of the c-boundary (at the three levels: point set, chronology and topology) of a wide class of spacetimes, is obtained.Comment: 44 pages, 5 Figures, latex. Version with minor changes and the inclusion of Figure

Non-radial Oscillation Modes of Compact Stars with a Crust

Oscillation modes of isolated compact stars can, in principle, be a fingerprint of the equation of state (EoS) of dense matter. We study the non-radial high-frequency l=2 spheroidal modes of neutron stars and strange quark stars, adopting a two-component model (core and crust) for these two types of stars. Using perturbed fluid equations in the relativistic Cowling approximation, we explore the effect of a strangelet or hadronic crust on the oscillation modes of strange stars. The results differ from the case of neutron stars with a crust. In comparison to fluid-only configurations, we find that a solid crust on top of a neutron star increases the p-mode frequency slightly with little effect on the f-mode frequency, whereas for strange stars, a strangelet crust on top of a quark core significantly increases the f-mode frequency with little effect on the p-mode frequency.Comment: 10 pages, 6 figure

Spin-other-orbit matrix elements for f sup 4 configurations

Data for spin orbit matrix elements for f to 4th power configuratio