John Sallis of Duquesne University has edited this fine collection of essays on Heidegger as a tribute to the latter on the occasion of his eightieth birthday. Some of the contributions are papers that were read at a Heidegger Symposium at Duquesne in October, 1966. There is a brief letter by Heidegger addressed to Arthur Schrynemakers, chairman of the Symposium, in which Heidegger submits a set of questions for the consideration of the Symposium participants. Sallis contributes an article which responds (...) to these questions. Zygmunt Adamczewski's contribution is a commentary and elaboration of some issues, e.g., the translation of Wesen, which he discussed personally with Heidegger in 1968. Edward Ballard gives a very clear-headed account of Heidegger's critique of science. There is an excellent account of the "Ereignis" by Theodore Kisiel and of "Time and Being" by André Schuwer. Other contributors include C. D. Keyes, Thomas Langan, Ralph Powell, Anna-Teresa Tymieniecka and John Wild. The volume is lacking in two respects. Except for a brief piece by Langan and for certain implications of Powell's study, there is no really sustained and well-developed critique of Heidegger either internal or external, sympathetic or unsympathetic, a failure not uncommon among Heideggerians. Moreover, there is no index of any kind--of topics, of names, or of texts of Heidegger--which impairs the book's usefulness. --J. D. C. (shrink)
Progress in understanding mineral evolution, Earth’s changing near-surface mineralogy through time, depends on the availability of detailed information on mineral localities of known ages and geologic settings. A comprehensive database including this information, employing the mindat.org web site as a platform, is now being implemented. This resource will incorporate software to correlate a range of mineral occurrences and properties vs. time, and it will thus facilitate studies of the chang- ing diversity, distribution, associations, and characteristics of individual minerals as well (...) as mineral groups. The Mineral Evolution Database thus holds the prospect of revealing mineralogical records of important geophysical, geochemical, and biological events in Earth history. (shrink)
In this paper, we discuss the macroscopic quantum behavior of simple superconducting circuits. Starting from a Lagrangian for electromagnetic field with broken gauge symmetry, we construct a quantum circuit model for a superconducting weak link (SQUID) ring, together with the appropriate canonical commutation relations. We demonstrate that this model can be used to describe macroscopic excitations of the superconducting condensate and the localized charge states found in some ultrasmall-capacitance weak-link devices.
The statistical properties of a single quantum object and an ensemble of independent such objects are considered in detail for two-level systems. Computer simulations of dynamic zero-point quantum fluctuations for a single quantum object are reported and compared with analytic solutions for the ensemble case.
In what follows, I analyze Ralph Strode's treatise on obligations. I have used a hitherto unpublished edition of the text (based on 14 manuscripts) made by Prof. E.J. Ashworth. I first give a brief description of Strode's text, which is all the more necessary given that it is not available to the average reader; I also offer a reconstruction of the rules proposed by Strode, following the style of reconstruction used in my analysis of Burley's and Swyneshed's rules elsewhere—that (...) is, essentially based on the idea that obligationes can be viewed as logical games. In the second part, I address Strode's explicit arguments contra Swyneshed. In the third part, I discuss Strode's epistemic and pragmatic approach to obligationes. (shrink)