We make a brief review of the Kramers escape rate theory for the probabilistic motion of a particle in a potential well U(x), and under the influence of classical fluctuation forces. The Kramers theory is extended in order to take into account the action of the thermal and zero-point random electromagnetic fields on a charged particle. The result is physically relevant because we get a non-null escape rate over the potential barrier at low temperatures (T → 0). It is found (...) that, even if the mean energy is much smaller than the barrier height, the classical particle can escape from the potential well due to the action of the zero-point fluctuating fields. These stochastic effects can be used to give a classical interpretation to some quantum tunneling phenomena. Relevant experimental data are used to illustrate the theoretical results. (shrink)

We consider the simple case of a nonrelativistic charged harmonic oscillator in one dimension, to investigate how to take into account the radiation reaction and vacuum fluctuation forces within the Schrödinger equation. The effects of both zero-point and thermal classical electromagnetic vacuum fields, characteristic of stochastic electrodynamics, are separately considered. Our study confirms that the zero-point electromagnetic fluctuations are dynamically related to the momentum operator p=−i ℏ ∂/∂ x used in the Schrödinger equation.

‘Mysticism means to isolate the eternal from the originated.’ This is not my definition of the word ‘mysticism’ but that of the founder of the ‘orthodox’ school of Muslim mysticism, Al-Junayd of Baghdad who flourished in the ninth century a.d . In actual fact it is not a definition of mysticism at all but of the Arabic word tawḥīd which means primarily ‘the affirmation of unity’; and that surely is an essential ingredient of any form of mysticism: it is the (...) affirmation through personal experience of unity either absolutely or in some qualified sense. (shrink)

As everyone knows, since the end of the Second World War there has been a sensational revival of interest in the non-Christian religions particularly in the United States and in this country. The revival has taken two forms, the one popular, the other academic. The first of these has turned almost exclusively to Hindu and Buddhist mysticism and can be seen as an energetic reaction against the dogmatic and until very recently rigid structure of institutionalised Christianity and a search for (...) a lived experience of the freedom of the spirit which is held to be the true content of mysticism, obscured in Christianity by the basic dogma of a transcendent God, the ‘wholly Other’ of Rudolf Otto and his numerous followers, but wholly untrammelled by any such concept in the higher reaches of Vedanta and Buddhism, particularly in its Zen manifestation. On the academic side the picture is less clear. There is, of course, the claim that the study of religion, like any other academic study, must be subjected to and controlled by the same principles of ‘scientific’ objectivity to which the other ‘arts’ subjects have been subjected, to their own undoing. But even here there would seem to be a bias in favour of the religions of India and the Far East as against Islam, largely, one supposes, in response to popular demand. (shrink)

The goal of this study was to determine whether it is possible to teach children with serious decoding problems four text comprehension strategies in listening contexts. The subjects were 9-11 year old students from special schools for children with learning disabilities. All the students were very poor at decoding; half of the group were also poor listeners, whereas the other half consisted of normal listeners. The experimental children were trained in strategies of clarifying, questioning, summarising and predicting through a combination (...) of reciprocal teaching and direct instruction. The results indicated significant programme effects on a strategic listening comprehension test. A transfer effect on general listening comprehension and general reading comprehension tests was not found. The poor listeners within the experimental group did not perform better than the normal listeners. (shrink)

R. S. Peters, C. A. Mace; VII—Emotions and the Category of Passivity, Proceedings of the Aristotelian Society, Volume 62, Issue 1, 1 June 1962, Pages 117–142, h.

The problem that confronts us when we try to compare the structure of discourse and explanation in different domains of knowledge is that no one is an insider in more than one field, and insider information is essential. An observer who is not immersed in the practice of a particular scholarship and who wants to understand it is at the mercy of the practitioners. Yet those practitioners are themselves mystified by a largely unexamined communal myth of how scholarship is carried (...) on. R. G. Collingwood, although primarily a philosopher, was immersed in the community of historians and understood how history is done, so that he has had an immense influence on our ideas about historiography. Every historian knows The Idea of History.1 He was also a metaphysician, yet his influence on scientists’ understanding of nature, and of science, has been nil, and it is a rare scientist indeed who has ever heard of Collingwood or read The Idea of Nature.2 Collingwood’s views of the structure of science had to be constructed in large part from the elaborate fictions created by scientists and by an earlier generation of philosophers and historians of science who participated in the Baconian myth of the hypothetical-deductive scheme. 1. See R. G. Collingwood, The Idea of History .2. See Collingwood, The Idea of Nature . R. C. Lewontin is Alexander Agassiz Professor at Harvard University. He is an experimental and theoretical evolutionary geneticist who has also worked extensively on epistemological issues in biology. He is the author of The Genetic Basis of Evolutionary Change and, with Richard Levins, of The Dialectical Biologist . His current research concerns the nature of genetic variation among individuals within species. (shrink)

R. S. Peters, C. A. Mace; VII—Emotions and the Category of Passivity, Proceedings of the Aristotelian Society, Volume 62, Issue 1, 1 June 1962, Pages 117–142, h.

The metaphorical nature of biological language is examined and the use of metaphors for providing the linguistic context in which similarities and differences are made is described. Certain pervasive metaphors which are characterised by systemic properties are noted, and in order to provide some focus to the study, systemic metaphors associated with machine, text and organism are discussed. Other systemic metaphors such as society and circuit are also reported. Some details concerning interrelations between automaton and organism are presented in the (...) light of the previous discussion.An approach towards the analysis of biosystem metaphors is outlined which relates part-whole, organisational level and systemic metaphors in a single model. Examples are provided throughout the discussion and mainly come from computing. The potential for metaphorical transfers between these domains is considered. (shrink)

Hawthorne and Magidor's criticisms of the model of presupposition and assertion that I have used and defended are all based on a rejection of some transparency or introspection of assumptions about speaker presupposition. This response to those criticisms aims first to clarify, and then to defend, the required transparency assumptions. It is argued, first, that if the assumptions are properly understood, some prima facie problems for them do not apply, second, that rejecting the assumptions has intuitively implausible consequences, and third, (...) that the 'margin of error' argument against the principle of positive introspection has a false premiss. The paper concludes with a response to a criticism of what Hawthorne and Magidor call 'the uniformity principle' that is used in the model to explain some pragmatic phenomena. (shrink)

We present a comprehensive study of the axiom schemas IΣ - n , BΣ - n (induction and collection schemas for parameter free Σ n formulas) and some closely related schemas.

Objective—To report the ethical development of medical students across four years of education at one medical school.Design and setting—A questionnaire was distributed to all four classes at the Wake Forest University School of Medicine during the Spring of 1996. Participants—Three hundred and three students provided demographic information as well as information concerning their ethical development both as current medical students and future interns. Main measurements—Results were analyzed using cross-tabulations, correlations, and analysis of variance.Results—Results suggested that the observation of and participation (...) in unethical conduct1 may have disparaging effects on medical students' codes of ethics with 35% of the total sample (24% of first years rising to 55% of fourth years) stating that derogatory comments made by residents/attendings, either in the patient's presence or absence, were “sometimes” or “often” appropriate. However, approximately 70% of the sample contended that their personal code of ethics had not changed since beginning medical school and would not change as a resident. Conclusions—Results may represent an internal struggle that detracts from the medical school experience, both as a person and as a doctor. Our goal as educators is to alter the educational environment so that acceptance of such behaviour is not considered part of becoming a physician. (shrink)

A robust result in research on the production of grammatical agreement is that speakers are more likely to produce an erroneous verb with phrases such as the key to the cabinets, with a singular noun followed by a plural one, than with phrases such as the keys to the cabinet, where a plural noun is followed by a singular. These asymmetries are thought to reflect core language production processes. Previous accounts have attributed error patterns to a syntactic number feature present (...) on plurals but not singulars. An alternative approach is presented in which a process similar to structural priming contributes to the error asymmetry via speakers' past experiences with related agreement constructions. A corpus analysis and two agreement production studies test this account. The results suggest that agreement production is shaped by statistical learning from past language experience. Implications for accounts of agreement are discussed. (shrink)

R. C. Cross; XIII—Category Differences, Proceedings of the Aristotelian Society, Volume 59, Issue 1, 1 June 1959, Pages 255–270, https://doi.org/10.1093/aristot.

R. C. Cross; XIII—Category Differences, Proceedings of the Aristotelian Society, Volume 59, Issue 1, 1 June 1959, Pages 255–270, https://doi.org/10.1093/aristot.

Book reviewed in this article: Not In Our Genes: Biology, Ideology, and Human Nature. By R. C. Lewontin, Steven Rose, and Leon J. Kamin.

This invaluable resource is the first one-volume, in-depth, comprehensive history of modern science ever published.

Chalmers (2018) maintains that even if we understood every physical process in the brain we could still wonder why these processes give rise to conscious experience. The meta-problem is the challenge of explaining why we think this 'hard problem' exists. This response to the target paper endorses illusionist accounts of three 'problem intuitions' about consciousness: duality, presentation, and revelation. Subject–object duality is explained in terms of a clash between two compelling but contradictory convictions about consciousness. Phenomenal presence is understood in (...) relation to the configurational features of sensory experiences. And intuitions of revelation are explained as due to an unfounded belief in introspective ontological access. These illusionist analyses are used to bolster the case for physicalist realism rather than to support 'strong' illusionism. In addition to addressing the meta-problem they suggest a promising approach to the hard problem as wel. (shrink)