High-spin states have been studied in Pr-135(59), populated through the Cd-116(Na-23,4n) reaction at 115 MeV, using the Gammasphere gamma-ray spectrometer. The negative-parity yrast band has been significantly extended to spin similar to 45 (h) over bar and excitation energy 21.5 MeV, showing evidence for several rotational alignments. The positive-parity yrast band of Ce-135(58), populated through the p4n channel of this reaction, was also populated to spin similar to 38 (h) over bar and excitation energy 18 MeV. Cranking calculations indicate that (...) these nuclei are soft with respect to the triaxiality parameter gamma and that several competing nuclear shapes occur at high spin. (shrink)
Medium- and high-spin states of Pr-134 were populated using the Cd-116(Na-23, 5n) reaction and studied with the GAMMASPHERE spectrometer. Several new bands have been found in this nucleus, one of them being linked to the previously observed chiral-candidate twin-band structure. The ground state of Pr-134 could be determined through establishing a level structure that connects the two previously known long-lived isomeric states. Unambiguous spin-parity assignments for the excited states could be performed based on the known 2(-) spin-parity of the ground (...) state combined with the present experimental data. Intrinsic single-particle configurations have been assigned to the newly observed bands on the basis of the measured B(M1)/B(E2) ratios, alignments, band-crossing frequencies, bandhead spins, the observed single-particle configurations in the neighboring nuclei, and taking into account the predictions of total Routhian surface and tilted-axis cranking calculations. (shrink)
The paper describes metallographic observations of the development of fatigue cracks in copper. The specimens (polycrystal and single crystals) were tested in push-pull at 1000 c.p.s. It was shown that the fatigue crack started in a slip band inside a single grain. An electropolishing technique showed changes in the character of the slip band after 5% of the life had expired. Cracks more than one grain long were present when half the life had expired. It was confirmed that the fatigue (...) life could be increased by preventing access of oxygen to the surface. The bearing of these observations on the problem of the origin of a fatigue crack is discussed. (shrink)
Using nanoindentation, we examine the fundamental nature of plasticity in a bulk amorphous metal. We find that the mechanics of plasticity depend strongly on the indentation loading rate, with low rates promoting discretization of plasticity into rapid bursts. For sufficiently slow indentations, we find that plastic deformation becomes completely discretized in a series of isolated yielding events. As the loading rate is increased, a transition from discrete to continuous yielding is observed. These results are fundamentally different from the classical expectations (...) for metallic glasses, in which the transition from discrete to continuous yielding occurs upon a decrease in deformation rate. The present experimental results are analysed with reference to the theoretical ideal-plastic strain field beneath an indenter and rationalized on the basis of mechanistic models of glass plasticity. (shrink)
Polycrystalline specimens of copper, aluminium and gold were fatigued in, reversed bend in various pressures of air and in water vapour and inert gases. The ratio of life in atmosphere of air 60 that. in vacuum (? 10?6 mm Hg) at lives of about 106 cycles was 1:20 for copper, 1:5 for aluminium and about 1:1 for gold. Some specimens were examined at intervals during the test. Small cracks a few microns deep formed in the first few hundredths of the (...) life in air and after the same number of cycles in vacuum. The effect of air was to speed the propagation of cracks in copper and aluminium but not gold. Electron micrographs showed that extrusions and intrusions can occur close to each other in the same slip band. (shrink)
This essay examines the songwriting art of Bob Dylan as a vehicle for exploring and clarifying elements in Bernard Lonergan’s analysis of art. The elements focused upon include Lonergan’s treatment of symbols and symbolic meaning as the communicative medium of art, and, at greater length, Lonergan’s account of art’s capacity for what he calls “ulterior significance,” its ability to suggest depths of meaning—including divine or ultimate meaning—that we surmise to lie beyond our comprehension. Examining songs from the full range of (...) Dylan’s fifty-year career, the essay shows that from his early songwriting in the “folk” tradition and his breakthrough achievements of the mid-1960s, Dylan’s best art has been characterized by an unusual concision and power in its use of symbolic imagery, as well as by a recurrent ability to evoke, with artistic originality and effectiveness, mysteries of “ulterior significance.” These analyses are then brought together in a discussion of the religious, often eschatological, character of some of Dylan’s most significant work. (shrink)
[Michael Potter] If arithmetic is not analytic in Kant's sense, what is its subject matter? Answers to this question can be classified into four sorts according as they posit logic, experience, thought or the world as the source, but in each case we need to appeal to some further process if we are to generate a structure rich enough to represent arithmetic as standardly practised. I speculate that this further process is our reflection on the subject matter already obtained. This (...) suggestion seems problematic, however, since it seems to rest on a confusion between the empirical and the metaphysical self. /// [Bob Hale] Michael Potter considers several versions of the view that the truths of arithmetic are analytic and finds difficulties with all of them. There is, I think, no gainsaying his claim that arithmetic cannot be analytic in Kant's sense. However, his pessimistic assessment of the view that what is now widely called Hume's principle can serve as an analytic foundation for arithmetic seems to me unjustified. I consider and offer some answers to the objections he brings against it. (shrink)
This essay—originally a conference response to Glenn Hughes’ essay—explores how themes and notions in Lonergan’s philosophy of art extend in surprising and often unnoticed ways into the larger whole of Lonergan’s thought. By the same token, the broader framework of Lonergan’s philosophy sheds a great deal of interesting light on his philosophy of art. The essay explores this mutual illumination in the context of Hughes’ reflections on “ulterior significance.” For example, it relates Lonergan’s notion of art to his heuristic of (...) human development as an intertwining or interlocking of the organic, psychic, intellectual, and religious levels in human development. It also relates Lonergan’s notion of art, together with his recognition of the centrality of the symbolic in human living, to his treatment of the permanent human needs for liberation from “the ready-made world,” for the sense of the unknown, and for orientation into mystery—even for orientation into ultimate mystery. (shrink)
As we begin our exploration of our relationship with animals, we come face to face with Peter Singer and his insistence that speciesism is a vice. It is important to come to know what he means by speciesism, why he regards it as a moral mistake.
Bob B. He: Two-dimensional X-ray diffraction Content Type Journal Article Category Book Review Pages 1-2 DOI 10.1007/s10698-011-9135-8 Authors George B. Kauffman, Department of Chemistry, California State University, Fresno, Fresno, CA 93740-8034, USA Journal Foundations of Chemistry Online ISSN 1572-8463 Print ISSN 1386-4238.
This article focuses on Bob Zajonc’s views on unconscious emotion, especially in the context of the debates about the independence of affect and cognition. Historically, Bob was always interested in the “mere”—basic, fundamental processes. His empirical demonstrations of precognitive and preconscious emotional processes, combined with his elegant expositions of them, sharply contrasted with cold and complex cognitive models. Interestingly, Bob tended to believe that whereas the causes of emotion can be unconscious, the emotional state itself tends to be conscious. However, (...) he reconsidered this assumption and in his later work showed that subjects in affective priming experiments do not experience conscious affect, but instead act on basic preferences. Today, Bob’s insights continue to inspire research on “unconscious emotion.”. (shrink)
Bob Solomon used to inveigh against William James’ theory of emotions, but he eventually arrived at a rapprochement with James and James’s recent successors. In particular, James suggested that emotions are initiated by the “automatic, instinctive” appraisals that register important information in the body and are recorded by body-mapping brain areas. In recent work Solomon describes the judgments he thinks constitute emotions as felt bodily appraisals in similar fashion.
(Author’s reply at “Author-Meets-Critics” session (on Paul Redding, Analytic Philosophy and the Return of Hegelian Thought) at the Annual Meeting of the American Philosophical Association, Pacific Division, Vancouver, April 10, 2009. Robert Brandom’s “critic’s” contribution is available as “Hegel and Analytic Philosophy” from his website http://www.pitt.edu/~brandom/.).
The paper considers various ruminations on the aftermath of the death of a close one, and the processes of grieving and mourning. The conceptual examination of how grief impacts on its sufferers, from different cultural perspectives, is followed by an analytical survey of current thinking among psychologists, psychoanalysts and philosophers on the enigma of grief, and on the associated practice of mourning. Robert C. Solomon reflected deeply on the 'extreme emotion' of grief in his extensive theorizing on the emotions, particularly (...) in his essay 'On Grief and Gratitude', commenting that grief is 'often described as a very private, personal emotion, characterized by social withdrawal and shutting oneself off from the world' (2004: 73). While dialoguing with the spirit of Solomon by way also of a tribute to his immense insights, the paper engages in critical reflections on recent thinking in this area elsewhere - notably, in Heidegger, Freud, Nussbaum, Casey, Gustafson, and Kristeva - and offers a refreshing critique toward an alternative to the received wisdom. (shrink)
Conflicting religious experiences in different traditions do not necessarily <span class='Hi'>defeat</span> the rationality of conflicting beliefs sustained by those experiences in those traditions. The circularity that protects religious beliefs from such mutual <span class='Hi'>defeat</span> is not vicious. Moreover, the lack of ‘epistemological humility’ exhibited by such believers poses no threat to world peace. In fact, a campaign for compulsory humility would itself constitute a much greater threat.
With Matthew we have an unusual opportunity. The text is in a sense very welcoming. Even among those who have no experience of it as a liturgical text, names and phrases are familiar; no one stumbles over the pronunciation of “Pharisee,” etc. – at least not with the frequency that “Agamemnon” and “Thucydides” are passed over. Even the parables, which as parables should be mysterious, do not alienate the students: it is already acknowledged that the text is one that demands (...) more than a superficial reading. It demands interpretation. (shrink)
: From its founding in 1847, the AMA divided drugs into "ethical" and "unethical" preparations. Those that were ethical had a known composition and were advertised only to the profession. Others, patent medicines (technically proprietary drugs, whose trademarks were protected by copyright), were sold directly to the public. In spite of the AMA's efforts to ban the advertising and sale of these nostrums, proprietary drugs flourished during the nineteenth century. Starting in 1900, however, three major societal trends combined to bolster (...) the AMA's campaign, and by 1920 almost all advertising was directed to physicians, who would then prescribe medications to their patients. This ban on advertising pharmaceuticals directly to the public remained virtually unchanged until approximately 1980. Since then, it has slowly eroded and, as recently as 1997, the FDA created guidelines for pharmaceutical companies to advertise on television. What does this change say about the profession of medicine, the role of the physician in society, and the doctor-patient relationship? Using a comparative historical approach, this paper examines these issues. (shrink)