We show that in a dilute gas the wave function’s spreading is limited by scattering off other particles. This shows that quantum mechanics can be consistent with the kinetic theory of gases.

Stephen Law’s evil-god challenge is the argument that since an evil god is just as likely as the God of theism, there is no reason to believe that theism is true over believing there is a god who is omnipotent, omniscient, and omnimalevolent. There have been several attempts to answer the challenge, but recently John Collins has defended the evil-god challenge and also extended the argument past Law’s original formulation. In this article, I defend the classical theism of Thomas Aquinas (...) against the evil-god challenge. In particular, I explain how Aquinas’s theodicy involving God’s goodness and Aquinas’s privation view of evil avoid the challenge. (shrink)

Chaos theory is a rapidly growing field. As a technical term, chaos refers to deterministic but unpredictable processes being sensitively dependent upon initial conditions. Neurobiological models and experimental results are very complicated and some research groups have tried to pursue the neuronal chaos. Babloyantz's group has studied the fractal dimension (d) of electroencephalograms (EEG) in various physiological and pathological states. From deep sleep (d=4) to full awakening (d>8), a hierarchy of strange attractors paralles the hierarchy of states of consciousness. In (...) epilepsy (petit mal), despite the turbulent aspect of a seizure, the attractor dimension was near to 2. In Creutzfeld-Jacob disease, the regular EEG activity corresponded to an attractor dimension less than the one measured in deep sleep. Is it healthy to be chaotic? An active desynchronisation could be favourable to a physiological system. Rapp's group reported variations of fractal dimension according to particular tasks. During a mental arithmetic task, this dimension increased. In another task, a P300 fractal index decreased when a target was identified. It is clear that the EEG is not representing noise. Its underlying dynamics depends on only a few degrees of freedom despite yet it is difficult to compute accurately the relevant parameters.What is the cognitive role of such a chaotic dynamics? Freeman has studied the olfactory bulb in rabbits and rats for 15 years. Multi-electrode recordings of a few mm2 showed a chaotic hierarchy from deep anaesthesia to alert state. When an animal identified a previously learned odour, the fractal dimension of the dynamics dropped off (near limit cycles). The chaotic activity corresponding to an alert-and-waiting state seems to be a field of all possibilities and a focused activity corresponds to a reduction of the attractor in state space. For a couple of years, Freeman has developed a model of the olfactory bulb-cortex system. The behaviour of the simple model without learning was quite similar to the real behaviour and a model with learning is developed. (shrink)

Background In Canadian jurisdictions without specific legislation pertaining to research consent, the onus is placed on researchers to determine whether a child is capable of independently consenting to participate in a research study. Little, however, is known about how child health researchers are approaching consent and capacity assessment in practice. The aim of this study was to explore and describe researchers' current practices. Methods The study used a qualitative descriptive design consisting of 14 face-to-face interviews with child health researchers and (...) research assistants in Southern Ontario. Transcribed interviews were analysed for common themes. Results Procedures for assessing capacity varied considerably from the use of age cutoffs to in-depth engagement with each child. Three key issues emerged from the accounts: (1) requirements that consent be provided by a single person thwarted researchers' abilities to support family decision-making; (2) little practical distinction was made between assessing if a child was capable, versus determining if study information had been adequately explained by the researcher; and (3) participants' perceived that review boards' requirements may conflict with what they considered ethical consent practices. Conclusion The results suggest that researchers' consent and capacity knowledge and skills vary considerably. Perceived discrepancies between ethical practice and ethics boards' requirements suggest the need for dialogue, education and possibly ethics board reforms. Furthermore we propose, where appropriate, a ‘family decision-making’ model that allows parents and their children to consent together, thereby shifting the focus from separate assent and consent procedures to approaches that appropriately engage the child and family. (shrink)

Norman Daniels's new book, Just Health, brings together his decades of work on the problem of justice and health. It improves on earlier writings by discussing how we can meet health needs fairly when we cannot meet them all and by attending to the implications of the socioeconomic determinants of health. In this article I return to the core idea around which the entire theory is built: that the principle of equality of opportunity grounds a societal obligation to meet health (...) needs. I point, first, that nowhere does Daniels say just what version of that principle he accepts. I then proceed to construct a principle on his behalf, based on a faithful reading of Just Health. Once we actually nail down the principle, I argue, we will find that there are two problems: it is implausible in itself, and it fails to ground a societal obligation to meet health needs. (shrink)

Frank Wilderson: I introduce a semiotic configuration. The point is, at important levels of abstraction, people who are positioned as Black—which is very different from saying people who think of themselves as Black. One of the basic premises of Afropessimism, which makes it resonate with psychoanalysis or Marxism, is that where one is positioned in a paradigm might not be where one thinks one is or where one desires to be. When I teach undergraduates, I say: “Look, I used to (...) study neorealism. In these neorealist films, we have these people who are bona fide fascists, and then you have those people in the Communist Party, so they could not agree on much. They don’t see themselves as having much of a connection. But in a Gramscian sense, they are both positioned as the host of capitalist parasites. Both groups rely on the wage. So, they are both workers.” One of the big points with respect to the narratological question is that I, as a Black person, trained at Columbia University in creative writing, trained at UC Berkeley in critical theory, love narrative, but narrative does not love me. In other words, it is impossible for me to be “emplotted” as a speaking subject. I can only be “emplotted” as an object of narrative. But I am always struggling to attain that love of humanity; and if I were to attain it, the Human would not have a foil against which to know itself. So, what I am saying is that in a book like Red, White & Black, I am just being very categorically clear about the divisions. In Afropessimism, I am actually talking about the desire of a sentient being who cannot be allowed into an arena where people are recognized and incorporated, in Lacanian terms, as “contemporaries” of human beings. So, there is all this back and forth. I don’t think this speaking subject in Afropessimism ever achieves anything in particular. It is always struggling toward being a subject that can actually travel on a narrative arc and yet ultimately is an object that can never travel from dispossession to redemptive recovery. (shrink)

The purpose of this article is to discuss at greater length two problems raised by Mr. D. J. Mosley towards the end of his discussion of the Athenian Embassy to Sparta in 371 published in Proceedings of the Cambridge Philological Society N.s. viii, 41 ff. The first of these problems concerns the policy pursued by Callistratus at this peace-conference, the second the effect on their audience of the divergent speeches of three of the Athenian ambassadors, Callias, Autocles, and Callistratus, which (...) Xenophon reports. (shrink)