Ni-44 at.% Al and Ni-50 at.% Al single crystals were tested in compression in the hard d 001 ¢ orientation. The dislocation processes and deformation behaviour were studied as a function of temperature, strain and strain rate. A slip transition in NiAl occurs from a d 111 ¢ slip to non- a d 111 ¢ slip at intermediate temperatures. In Ni-50 at.% Al single crystals, only a d 010 ¢ dislocations are observed above the slip transition temperature. In contrast, a (...) d 101 ¢ {101} glide has been observed to control deformation beyond the slip transition temperature in Ni-44 at.% Al. a d 101 ¢ dislocations are observed primarily along both d 111 ¢ directions in the glide plane. High-resolution transmission electron microscopy observations show that the core of the a d 101 ¢ dislocations along these directions is decomposed into two a d 010 ¢ dislocations, separated by a distance of approximately 2 nm. The temperature window of stability for these a d 101 ¢ dislocations depends upon the strain rate. At a strain rate of 1.4 2 10 m 4 s m 1 , a d 101 ¢ dislocations are observed between 800 and 1000 K. Complete decomposition of a d 101 ¢ dislocations into a d 010 ¢ dislocations occurs beyond 1000 K, leading to a d 010 ¢ climb as the deformation mode at higher temperatures. At lower strain rates, decomposition of a d 101 ¢ dislocations has been observed to occur along the edge orientation at temperatures below 1000 K. Embedded-atom method calculations and experimental results indicate that a d 101 ¢ dislocations have a large Peierls stress at low temperatures. Based on the present microstructural observations and a survey of the literature with respect to vacancy content and diffusion in NiAl, a model is proposed for a d 101 ¢ {101} glide in Ni-44 at.% Al, and for the observed yield strength versus temperature behaviour of Ni-Al alloys at intermediate and high temperatures. (shrink)

The familiar crux in line 139, as obelized by Dawe, disappears in the new Oxford Text, whose editors accept the Triclinian reading . Their short critical note touches only on the metrical issue, citing discussions by Stinton and Diggle, in both of which acceptance of here is cautiously linked with recognition of the same responsion at Philoctetes 209/218 and Euripides, Medea 159/183. The note concludes with a reference to p. 75 of an article by K. Itsumi.

Neoplatonic allegorical interpretation expounds how literary texts present philosophical ideas in an enigmatic and coded form, offering an alternative path to the divine truths. The Neoplatonist Porphyry’s _On the Cave of the Nymphs_ is one of the most significant allegorical interpretation handed down to us from Antiquity. This monograph, exclusively dedicated to the analysis of _On the Cave of Nymphs_, demonstrates that Porphyry interprets Homer’s verse from Odyssey 13.102-112 to convey his philosophical thoughts, particularly on the material world, relationship between (...) soul and body and the salvation of the soul through the doctrines of Plato and Plotinus. The Homeric cave of the nymphs with two gates is a station where the souls descend into genesis and ascend to the intelligible realm. Porphyry associates Odysseus’ long wanderings with the journey of the soul and its salvation from the irrational to rational through escape from all toils of the material world. (shrink)

Following the publication of Thomas Kuhn’s Structure of Scientific Revolutions the term paradigm became ubiquitous. It is now commonplace in academic writing across the disciplines. Though much has been written about Kuhn’s use of the term and its impact on other fields, there has not yet been a systematic study of how frequently Kuhn used the term in Structure. My aim in this paper is to provide such an analysis. I aim to answer the following questions: (1) How many times (...) does Kuhn actually use the term in the book?; (2) What is the most number of times that he uses the term on a single page?; and (3) Is the term used evenly throughout the book or is it mentioned more often in some chapters than in others? (shrink)

Open peer commentary on the article “Perception-Action Mutuality Obviates Mental Construction” by Martin Flament Fultot, Lin Nie & Claudia Carello. Upshot: We examine whether there are any irreducible contradictions between ecological psychology and radical enactivism. We concentrate on two points of contention between the two approaches: the relevance of neural structures in understanding perception and the use of semantically loaded concepts in theorizing about perception.

In this article cheating in network and specifically online computer games is looked into as a moral offence. Reasons for the public ignoring the issue are brought forth. We present what could be considered as cheating in generic terms and in context. Different kinds of cheating are delineated, and remedies proposed. We also identify what is not cheating.

Goff argues that Galileo erred in denying that sensory qualities are present in the physical world and that we should correct his error by supposing that all matter has an intrinsic conscious aspect. This paper argues that we should be open to another theoretical option. Galileo's real error, I argue, was not about the location of sensory qualities, but about their very existence. Like most people, Galileo assumed that sensory qualities are instantiated somewhere. I argue that this is a theoretical (...) assumption which can and should be questioned. If we drop it, we can give a natural account of the function of sensory quality talk and explain how our puzzlement about consciousness arises. (shrink)