© 2017. The American Astronomical Society. All rights reserved.We present new observations of the low-mass companion to HD 984 taken with the Gemini Planet Imager as a part of the GPI Exoplanet Survey campaign. Images of HD 984 B were obtained in the J and H bands. Combined with archival epochs from 2012 and 2014, we fit the first orbit to the companion to find an 18 au orbit with a 68% confidence interval between 14 and 28 au, an eccentricity (...) of 0.18 with a 68% confidence interval between 0.05 and 0.47, and an inclination of 119°with a 68% confidence interval between 114°and 125°. To address the considerable spectral covariance in both spectra, we present a method of splitting the spectra into low and high frequencies to analyze the spectral structure at different spatial frequencies with the proper spectral noise correlation. Using the split spectra, we compare them to known spectral types using field brown dwarf and low-mass star spectra and find a best-fit match of a field gravity M6.5 ±1.5 spectral type with a corresponding temperature of K. Photometry of the companion yields a luminosity of log=2.88 ± 0.07 dex with DUSTY models. Mass estimates, again from DUSTY models, find an age-dependent mass of 34 ±1 to 95 ±4 M Jup. These results are consistent with previous measurements of the object. (shrink)

Human activity is permeated by norms of all sorts: moral norms provide the 'code' for what we ought to do, norms of logic regulate how we ought to reason, scientific norms set the standards for what counts as knowledge, legal norms determine what is lawfully permitted and what isn't, aesthetic norms establish canons of beauty and shape artistic trends and practices, and socio-cultural norms provide criteria for what counts as tolerable, just, praiseworthy, or unacceptable in a community or milieu. Given (...) the diversity of norm-governed phenomena prevailing in our everyday experience, it is not surprising that the question of normativity has recently generated important debates in philosophy. However, the more specific question concerning the nature and function of 'norms in perceptual experience' has received comparatively little attention. This volume brings together scholars from philosophy of mind, philosophy of perception, and phenomenology to explore this question. (shrink)

The main theme of Steve Crowell’s excellent Normativity and Phenomenology in Husserl and Heidegger is ‘the connection between normativity and meaning’ (p. 1), a central issue in both Husserl’s and...

Le présent essai porte sur la question de la place de la critique des religions en philosophie et dans l'espace public. C'est une discussion franche avec des philosophes québécois qui défendent la liberté de religion comme si cette liberté était la forme exemplaire des libertés fondamentales d'une société démocratique. Les croyances religieuses échappent-elles à la science? Est-il vraiment rationnel de croire que la nature est l'œuvre d'une intelligence surnaturelle? Pourquoi la croyance religieuse est-elle érigée en norme? Quelle est la place (...) de la religion à l'école? Peut-on dissocier la morale de la religion? Sans aller jusqu'à conclure que les religions doivent être éliminées ou que la science détient le monopole de la vérité, il ressort de cette analyse rigoureuse que l'attitude de traitement préférentiel des religions est injuste envers les non-croyants et qu'elle est en bonne partie la cause de la querelle sur la laïcité. " La position que défend ici Doyon est somme toute pérenne : sans aller jusqu'à remonter à Lucrèce et à quelques autres auteurs de l'Antiquité, elle est nettement celle qui se déploie à partir du Siècle des Lumières, et que diversement et de manière complémentaire formulent en France des gens comme Condorcet, D'Holbach, Buisson et d'autres. L'incontournable question que nous laisse ce bel ouvrage est dès lors de savoir s'il faut modifier cette position canonique ou si ce n'est pas plutôt pour s'en être éloigné que nous faisons aujourd'hui face aux difficultés qui sont les nôtres." – Normand Baillargeon, extrait de la préface. (shrink)

This study examined the hypothesis that conditional reasoning involves visual short-term memory resources (Johnson-Laird, 1985). A total of 147 university students were given measures of verbal and visual short-term memory capacity and a series of concrete and abstract conditional reasoning problems. Results indicate that there is a positive correlation between verbal working memory capacity and reasoning with both concrete and abstract premises. A positive correlation was also obtained between visual working memory capacity and reasoning with concrete premises.

The notions of perceptual normativity and optimality have generated much discussion in the last decade or so in the literature on Merleau-Ponty. Husserl’s position on the topic has been far less extensively investigated. Surprisingly, however, Husserl wrote a great deal about the question of perceptual optimality. Not only are there a considerable number of important passages scattered throughout the manuscripts, the archive also contains a few important full texts on precisely this issue. Given the role of fulfillment for Husserl’s concept (...) of intentionality, this should not really come as a surprise, since the teleological nature of the fulfillment structure terminates in an experience of the optimum. Hence, however marginal this topic might seem at first glance, reflecting on it rapidly leads us to the heart of Husserl’s project and sheds further light on his conception of intentional experience. (shrink)

Huit mois après le dépôt du rapport de la Commission Charbonneau, nous avons souhaité explorer les défis liés à la mise en place des recommandations. Avec un regard constructif, nous nous questionnons sur le fait de savoir à qui incombe le suivi d’un rapport de cette envergure ainsi que les obligations légales liées à cette question et nous nous permettons d’émettre certaines idées liées à une vision globale en matière de reddition de comptes. Tout en partageant nos réflexions inspirées des (...) bonnes pratiques en matière de gestion du risque de fraude, nous présentons la complexité de la mise en place d’une recommandation tels le soutien et la protection des lanceurs d’alerte. (shrink)

"Williams's masterful translation satisfies (at last!) a long-standing need. There are lots of good translations of Augustine's great work, but until now we have been forced to choose between those that strive to replicate in English something of the majesty and beauty of Augustine's Latin style and those that opt instead to convey the careful precision of his philosophical terminology and argumentation. Finally, Williams has succeeded in capturing both sides of Augustine's mind in a richly evocative, impeccably reliable, elegantly readable (...) presentation of one of the most impressive achievements in Western thought--Augustine's Confessions." --Scott MacDonald, Professor of Philosophy and Norma K. Regan Professor in Christian Studies, Cornell University. (shrink)

Most twentieth‐century European philosophers have attempted to think anew the Kantian question about the necessary conditions of experience. A rapid survey of last century's European philosophy would easily show that in spite of the various criticisms formulated against the very project of transcendental foundationalism, the vast majority of the philosophers in the so‐called Continental tradition have not abandoned the project of formulating transcendental arguments altogether. These transcendental inquiries into the conditions of possibility of all these phenomena are certainly more immediately (...) visible in the early works, especially those on Husserl, but a patient reading would show that they are still very much present in the later writings as well. The overcoming of classical transcendentalism at work in deconstruction is indeed the outcome of an ultra‐transcendental strategy. In Of Grammatology, Derrida exposes this ultra‐transcendental logic for the first time when he famously claims that a “pathway” through the transcendental is necessary. (shrink)

In his collection of essays Having the World in View (2009), John McDowell draws a distinction between empirical experience (conceived as the conceptual activity relevant to judgment) and empirical judgment (i.e., the full-fledged assertoric content itself ). McDowell’s latest proposal is that the form of empirical experience is transferable into judgment, but it is not itself a judgment. Taking back the view he advanced in Mind and World, McDowell now believes that perception does not have propositional content as such, but (...) the content of perception can, however, always be actualized in a judgment. There is, in other words, a strict parallelism between the deliverances of sensibility and potential future judgments of experience. The early Husserl disagrees with this and recognizesexplicitly the existence of coherent forms of perceptual engagement with the world that is independent of the mastery of language and the use of concepts.Perception constitutes—together with certain other embodied practices—our primary mode of access to the world, and this occurs before and independently ofour thinking activity. However, the realization of the centrality of time for intentionality will lead Husserl after 1905 to recognize a kind of lawfulness internal tothe sensuous materials themselves, prior to any egoical achievement. The most immediate consequence of this paradigm change is that the very idea of non-conceptual content now seems unwarranted. Indeed, if time is that which keeps the process of sense formation unified even at the lowest levels of constitution, then the world-disclosing activity of the ego cannot be discontinuous with the conceptual realm. Against this background, it will be argued that the dialectic between the conceptual and non-conceptual ultimately makes no sense on a phenomenological basis. Once temporality has entered the scene, the only meaningful opposition that stands is that between the conceptual and pre-conceptual spheres. (shrink)

The paper is organized around two ideas that come out in Steve Crowell’s Normativity and Phenomenology in Husserl and Heidegger and that I discuss critically in turn. The first concerns the reach of Crowell’s claim according to which the connection between intentionality, meaning and normativity is necessary in all forms of intentional experience. I make my point by considering the case of imagining experiences, which are—I argue—meaningful, intentional, but not necessarily normative in any relevant sense. The second question is about (...) Crowell’s criticism of the role of bodily self-awareness in Husserl’s phenomenology of perception. While Crowell is right to maintain that the norm of proper functioning relevant to bodily skills can’t be understood as arising from a system of kinaesthetic sensations alone, I argue that bodily self-awareness still has a normative role to play in perception inasmuch as it allows me to cast my own experience in evaluative terms. (shrink)

The Moral Nexus develops and defends a new interpretation of morality—namely, as a set of requirements that connect agents normatively to other persons in a nexus of moral relations. According to this relational interpretation, moral demands are directed to other individuals, who have claims that the agent comply with these demands. Interpersonal morality, so conceived, is the domain of what we owe to each other, insofar as we are each persons with equal moral standing. The book offers an interpretative argument (...) for the relational approach. Specifically, it highlights neglected advantages of this way of understanding the moral domain; explores important theoretical and practical presuppositions of relational moral duties; and considers the normative implications of understanding morality in relational terms. The book features a novel defense of the relational approach to morality, which emphasizes the special significance that moral requirements have, both for agents who are deliberating about what to do and for those who stand to be affected by their actions. The book argues that relational moral requirements can be understood to link us to all individuals whose interests render them vulnerable to our agency, regardless of whether they stand in any prior relationship to us. It also offers fresh accounts of some of the moral phenomena that have seemed to resist treatment in relational terms, showing that the relational interpretation is a viable framework for understanding our specific moral obligations to other people. (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)

The paper is organized around two ideas that come out in Steve Crowell’s Normativity and Phenomenology in Husserl and Heidegger and that I discuss critically in turn. The first concerns the reach of Crowell’s claim according to which the connection between intentionality, meaning and normativity is necessary in all forms of intentional experience. I make my point by considering the case of imagining experiences, which are—I argue—meaningful, intentional, but not necessarily normative in any relevant sense. The second question is about (...) Crowell’s criticism of the role of bodily self-awareness in Husserl’s phenomenology of perception. While Crowell is right to maintain that the norm of proper functioning relevant to bodily skills can’t be understood as arising from a system of kinaesthetic sensations alone, I argue that bodily self-awareness still has a normative role to play in perception inasmuch as it allows me to cast my own experience in evaluative terms. (shrink)

Issus de deux journées d’étude organisées en 2008 et 2010 dans le cadre du programme de recherche « Modèles familiaux et cultures politiques » (École française de Rome), les neuf articles de ce volume examinent la construction des liens familiaux à l’époque moderne dans des territoires (Italie, France, espace germanique, péninsule Ibérique et son empire) et des configurations politiques, juridiques, sociales et économiques variées. La première partie s’attache à la formation du lien matrimon...

Contesting Antiquity in Egypt: Archaeologies, Museums and the Struggle for Identities from World War I to Nasser. By Donald Malcolm Reid. Cairo: The American University in Cairo Press, 2015. Pp. xxii + 491, illus. $59.95.

Du renforcement de la « monarchie paternelle » à l’existence d’un « empire des mères », la confrontation des sources du droit civil et des archives criminelles du Châtelet, au premier XVIIIe siècle, donne une vision complexe des rapports noués entre l’expérience de la maternité et l’exercice de l’autorité. Statutairement, les mères légitimes sont associées, sur un mode mineur ou de plein droit dans le cas du veuvage et de l’institution tutélaire, à l’exercice de l’autorité paternelle. Mais en débordant ces (...) catégories juridiques admises, en les utilisant à leur avantage ou en les contournant, les mères de la société parisienne se révèlent plus autoritaires que tendres, usant des prérogatives du patriarche, tout en revendiquant l’existence d’une sphère d’autorité purement féminine, dont elles assurent d’ailleurs, avec leurs filles, la reproduction. Par le biais des statuts octroyés ou des rôles assumés, les mères jouissent ainsi de pouvoirs, qui participent de l’institution paternelle et de la culture féminine. (shrink)

The dynamical behaviour of a very general model of neural networks with random asymmetric synaptic weights is investigated in the presence of random thresholds. Using mean-field equations, the bifurcations of the fixed points and the change of regime when varying control parameters are established. Different areas with various regimes are defined in the parameter space. Chaos arises generically by a quasi-periodicity route.

Following Karni's seminal work, Walker and other researchers have recently provided gradually convincing evidence that sleep is critical for the consolidation-based enhancement (CBE) of motor sequence learning. Studies in our laboratory using a motor adaptation paradigm, however, show that CBE can also occur after the simple passage of time, suggesting that sleep effects on memory consolidation are task-related, and possibly dependent on anatomically dissociable circuits.

Chaos in nervous system is a fascinating but controversial field of investigation. To approach the role of chaos in the real brain, we theoretically and numerically investigate the occurrence of chaos inartificial neural networks. Most of the time, recurrent networks (with feedbacks) are fully connected. This architecture being not biologically plausible, the occurrence of chaos is studied here for a randomly diluted architecture. By normalizing the variance of synaptic weights, we produce a bifurcation parameter, dependent on this variance and on (...) the slope of the transfer function, that allows a sustained activity and the occurrence of chaos when reaching a critical value. Even for weak connectivity and small size, we find numerical results in accordance with the theoretical ones previously established for fully connected infinite sized networks. The route towards chaos is numerically checked to be a quasi-periodic one, whatever the type of the first bifurcation is. Our results suggest that such high-dimensional networks behave like low-dimensional dynamical systems. (shrink)