SummaryIntense, sustained nursing lengthens inter-birth intervals and is causally linked with low natural fertility. However, in traditional settings, the effects of such nursing on fertility are difficult to disentangle from those of nutrition. Results from an prospective, direct observational study of reproductive function in well-nourished Amele women who nurse intensively and persistently but who also have high fertility are here presented. Endocrine measures show that ovarian activity resumes by median 11·0 months postpartum. Median duration of postpartum amenorrhoea is 11·3 months, (...) time to next conception is 19·0 months, and the inter-birth interval is 28·0 months. Average life time fertility is 6·8. High fertility in Amele women is due both to refractoriness of reproductive function to suckling stimuli, and to maintenance of equivalent age-specific fertility rates across the reproductive life span. (shrink)

This book updates and adds to the classic Social Movements of the Sixties and Seventies, showing how social movement theory has grown and changed.

This article addresses the ability of Parallel Distributed Processing (PDP) networks to generate stagewise cognitive development in accordance with Piaget's theory of cognitive epigenesis. We carried out a replication study of the simulation experiments by McClelland (1989) and McClelland and Jenkins (1991) in which a PDP network learns to solve balance scale problems. In objective tests motivated from catastrophe theory, a mathematical theory of transitions in epigenetical systems, no evidence for stage transitions in network performance was found. It is (...) concluded that PDP networks lack the ability to recover the positive outcomes of analogous catastrophe analyses of real cognitive developmental data. In an attempt to further characterize the learning behaviour of PDP networks, we carried out a second simulation study using the discrimination‐shift paradigm. The results thus obtained indicate that PDP learning is compatible with the learning of stimulus‐response relationships, not with the acquisition of mediating rules such as conceived in (neo‐)Piagetian theory. In closing, we speculate about the feasibility of simulating stagewise development with alternative network architectures. (shrink)

Si un philosophe a fondé son oeuvre sur la conscience historique, c'est bien Raymond Aron. Le rapprochement entre Aron et la post-modernité pourrait surprendre. Il en va tout autrement si l'on considère la conception historique de la post-modernité : celle-ci suit logiquement les Temps Modernes. Elle comprend alors les deux siècles de tensions idéologiques qui ont suivi 1789, jusqu'à la chute du mur de Berlin. Raymond Aron a commenté et pensé les convulsions apocalyptiques du dernier siècle post-moderne. D'où l'idée de (...) le considérer sous plusieurs angles : face au basculement du monde, la critique des idéologies (D. Steinmetz-Jenkins), la théorie des relations internationales (O. Rosenboim), son jugement sur la "tragédie algérienne" (O. Dard). Mais Aron est aussi sensible aux permanences, à ce qui ne bascule pas : c'est un penseur de la nation et des identités régionales, qui s'interroge sur sa propre judéité (G. De Ligio). La philosophie d'Aron, où l'historien est créateur et incarné, présente une analogie avec la théologie chrétienne : Pierre Manent décrit la relation d'Aron au christianisme. Enfin, Aron reste un intellectuel tout engagé dans la défense de la liberté, ce qu'explorent deux contributions : sur ce qu'il doit au libéralisme d'Edmund Burke (M. Oppermann), et sur sa recherche d'une stratégie modérée chez l'historien Hans Delbrück (J. Mouric). Encadrées par l'introduction de Fabrice Bouthillon et la conclusion de Pascal David, ces études esquissent les traits d'une pensée subtile : sceptique contre le dogmatisme des idéologies totalitaires, mais non relativiste, attachée à l'historicité, sans tomber dans le déterminisme historique. Ce volume est issu de la journée d'études du 18 novembre 2014 à l'Université de Bretagne occidentale à Brest."--Page 4 of cover. (shrink)

Our sense of self includes awareness of our thoughts and movements, and our control over them. This feeling can be altered or lost in neuropsychiatric disorders as well as in phenomena such as “automatic writing” whereby writing is attributed to an external source. Here, we employed suggestion in highly hypnotically suggestible participants to model various experiences of automatic writing during a sentence completion task. Results showed that the induction of hypnosis, without additional suggestion, was associated with a small but significant (...) reduction of control, ownership, and awareness for writing. Targeted suggestions produced a double dissociation between thought and movement components of writing, for both feelings of control and ownership, and additionally, reduced awareness of writing. Overall, suggestion produced selective alterations in the control, ownership, and awareness of thought and motor components of writing, thus enabling key aspects of automatic writing, observed across different clinical and cultural settings, to be modelled. (shrink)

D E Cooper; Is Language Learned?1, Journal of Philosophy of Education, Volume 9, Issue 1, 30 May 2006, Pages 93–104, https://doi.org/10.1111/j.1467-9752.1975.tb.

Infinite time Turing machines with only one tape are in many respects fully as powerful as their multi-tape cousins. In particular, the two models of machine give rise to the same class of decidable sets, the same degree structure and, at least for partial functions f : ℝ → ℕ, the same class of computable functions. Nevertheless, there are infinite time computable functions f : ℝ → ℝ that are not one-tape computable, and so the two models of infinitary computation (...) are not equivalent. Surprisingly, the class of one-tape computable functions is not closed under composition; but closing it under composition yields the full class of all infinite time computable functions. Finally, every ordinal that is clockable by an infinite time Turing machine is clockable by a one-tape machine, except certain isolated ordinals that end gaps in the clockable ordinals. (shrink)

Is God's foreknowledge compatible with human freedom? One of the most attractive attempts to reconcile the two is the Ockhamistic view, which subscribes not only to human freedom and divine omniscience, but retains our most fundamental intuitions concerning God and time: that the past is immutable, that God exists and acts in time, and that there is no backward causation. In order to achieve all that, Ockhamists distinguish ‘hard facts’ about the past which cannot possibly be altered from ‘soft facts’ (...) about the past which are alterable, and argue that God's prior beliefs about human actions are soft facts about the past. (shrink)

Causal theories of content, a popular family of approaches to defining the content of mental states, commonly run afoul of two related and serious problems that prevent them from providing an adequate theory of mental content—the misrepresentation problem and the disjunction problem. In this paper, I present a causal theory of content, built on information theoretic tools, that solves these problems and provides a viable model of mental content. This is the greatest surprise reduction theory of content, which identifies the (...) content of a signal as the event the surprisal of which is most reduced by that signal. Conceptually, this amounts to the claim that the content of a signal is the event the probability of which has increased by the largest proportion, or the event that the signal makes the most less surprising to us. I develop the greatest surprise reduction theory of content in four stages. First, I introduce the general project of causal theories of content, and the challenges presented to this project by the misrepresentation and disjunction problems. Next, I review two recent and prominent causal theories of content and demonstrate the serious challenges faced by these approaches, both clarifying the need for a solution to the misrepresentation and disjunction problems and providing a conceptual background for the greatest surprise reduction theory. Then, I develop the greatest surprise reduction theory of content, demonstrate its ability to resolve the misrepresentation and disjunction problems, and explore some additional applications it may have. Finally, I conclude with a discussion of a particularly difficult challenge that remains to be addressed—the partition problem—and sketch a path to a potential solution. (shrink)

This volume is an entertaining, multi-faceted exploration of what Facebook means for us and for our relationships. Facebook is a social networking service and website that launched in 2004. Users may create a personal profile, add other users as friends,and exchange messages, including automatic notifications when they update their profile. Additionally, users may join common interest user groups, organized by workplace, school or college, or other characteristics. With discussions ranging from the nature of friendship and its relationship to "friending," to (...) the efficacy of "online activism," this book is a systematic attempt to understand Facebook, also offering perspectives on Twitter and Web 2.0. (shrink)

Some of the objections to life-extension stem from a concern with overpopulation. I will show that whether or not the overpopulation threat is realistic, arguments from overpopulation cannot ethically demand halting the quest for, nor access to, life-extension. The reason for this is that we have a right to life, which entitles us not to have meaningful life denied to us against our will and which does not allow discrimination solely on the grounds of age. If the threat of overpopulation (...) creates a rights conflict between the right to come into existence, the right to reproduce, the right to more opportunities and space , and the right to life, the latter ought to be given precedence. (shrink)

Background: Despite the expansion of ethics consultation services, questions remain about the aims of clinical ethics consultation, its methods and the expertise of those who provide such services.Objective: To describe physicians’ expectations regarding the training and skills necessary for ethics consultants to contribute effectively to the care of patients in intensive care unit .Design: Mailed survey.Participants: Physicians responsible for the care of at least 10 patients in ICU over a 6-month period at a 921-bed private teaching hospital with an established (...) ethics consultation service. 69 of 92 eligible physicians responded.Measurements: Importance of specialised knowledge and skills for ethics consultants contributing to the care of patients in ICU; need for advanced disciplinary training; expectations regarding formal-training programmes for ethics consultants.Results: Expertise in ethics was described most often as important for ethics consultants taking part in the care of patients in ICU, compared with expertise in law , religious traditions , medicine and conflict-mediation techniques . When asked about the formal training consultants should possess, however, physicians involved in the care of patients in ICU most often identified advanced medical training as important.Conclusions: Although many physicians caring for patients in ICU believe ethics consultants must possess non-medical expertise in ethics and law if they are to contribute effectively to patient care, these physicians place a very high value on medical training as well, suggesting a “medicine plus one” view of the training of an ideal ethics consultant. As ethics consultation services expand, clear expectations regarding the training of ethics consultants should be established. (shrink)

Antimicrobial resistance is a critical public health challenge, and the contribution of the widespread use of antimicrobials in food animals to bacterial drug resistance and human infection demands greater policymaker attention. Global consumption of antimicrobials in food animal production by 2030 is projected to rise by two-thirds due to increases in both food animal production and demand for animal products. In the United States, the volume of antibiotics sold for use in food-producing animals is at least three times greater than (...) that sold for human use. A One Health approach that emphasizes the connections among the health of humans, animals, and the environment is needed to address antibiotic resistance in an integrated manner. This approach holds the promise of collaboration across multiple disciplines, including doctors, veterinarians, food safety professionals, and environmental health experts. (shrink)