This paper addresses the existence of Hopf bifurcations in a directed acyclic network of neurons, each of them being modeled by a Hindmarsh–Rose neuronal model. The bifurcation parameter is the small parameter corresponding to the ratio of time scales between the fast and the slow dynamics. We first prove that, under certain hypotheses, the single uncoupled neuron can undergo a Hopf bifurcation. Hopf bifurcation occurrences in a directed acyclic network of HR neurons are then discussed. Numerical simulations are carried out (...) to observe these bifurcations and to illustrate the theoretical results. (shrink)

AsbtractThis article does exactly what the title suggests: It reads Derrida’s idea of close reading into Doug Lemov’s idea of close reading by close reading Lemov’s definition for close reading. Building on work that considers poststructural approaches in reading classrooms, I engage Lemov and Derrida in a conversation about the meaning and uses of reading as a classroom practice. This approach asks questions about who gets to read, where, and in what ways. Within this conversation, I aim to open new (...) considerations of reading in classrooms in public schools in the U.S. The article concludes with some possibilities and risks of pursuing these ideas, focusing on the potential of new inquiries into the ‘right’ to read. (shrink)

Rapidly advancing studies on rhodopsin have focused on new strategies for crystallization of this integral membrane protein for x-ray analysis and on alternative methods for structural determination from nuclear magnetic resonance data. Functional studies of the interactions between the apoprotein and its chromophore have clarified the role of the chromophore in deactivation of opsin and in photoactivation of the pigment.

Исследование посвящено философскому осознанию природы духовности человека. Автор рассматривает духовность внутреннего мира человека как единство высших чувств души и нравственного сознания. Для специалистов в области философии, методологии науки.

In his essay “Goddesses of the Twenty‐first Century,” R. Buckminster Fuller's use of woman and goddess as metaphor suggests a fruitful source of images illuminating synergetic principles. Using five images, clustered as odyvessel‐matrix, the article suggests an epistemology and a heuristic for connecting the personal‐physical and the universal‐metaphysical. These images are (1) the Egyptian goddess Nut, (2) the Greek earth goddesses, (3) Neolithic Maltese goddess temples, (4) the double spiral, and (5) the Apollo Mission's Earth photographs. These images are intended (...) as transformational synergetic/ecofeminist figures to replace images of deprivation, alienation, and destruction with images of abundance, intimacy, and co‐creation. (shrink)

We argue that the appraisal of models in social epistemology requires conceiving of them as argumentative devices, taking into account the argumentative context and adopting a family-of-models perspective. We draw up such an account and show how it makes it easier to see the value and limits of the use of models in social epistemology. To illustrate our points, we document and explicate the argumentative role of epistemic landscape models in social epistemology and highlight their limitations. We also claim that (...) our account could be fruitfully used in appraising other models in philosophy and science. (shrink)

Philosophy Then and Now provides an innovative and engaging blend of introductory text with classic and contemporary readings. Each of the eight parts begins with an introductory section on the major ideas associated with a seminal figure from the history of philosophy. This is followed by key selections from the essential writings of that philosopher, as well as influential selections from contemporary figures. Key figures covered include: Socrates, Aquinas, Locke, Descartes, Mill, Nietzsche, Marx, and Sartre. By focusing on the core (...) themes, issues and problems of philosophy, the volume motivates student interest in the subject, and represents a distinctive text for all introductory courses in philosophy. (shrink)

Tipy mirovozzreniĭ -- Chuvstvennai︠a︡, intellektualʹnai︠a︡ i misticheskai︠a︡ intuit︠s︡ii︠a︡ -- Ideal-realizm.

Exclusionary defeat is Joseph Raz’s proposal for understanding the more complex, layered structure of practical reasoning. Exclusionary reasons are widely appealed to in legal theory and consistently arise in many other areas of philosophy. They have also been subject to a variety of challenges. I propose a new account of exclusionary reasons based on their justificatory role, rejecting Raz’s motivational account and especially contrasting exclusion with undercutting defeat. I explain the appeal and coherence of exclusionary reasons by appeal to commonsense (...) value pluralism and the intermediate space of public policies, social roles, and organizations. We often want our choices to have a certain character or instantiate a certain value and in order to do so, that choice can only be based on a restricted set of reasons. Exclusion explains how pro tanto practical reasons can be disqualified from counting towards a choice of a particular kind without being outweighed or undercut. (shrink)

Standard accounts of civil disobedience include nonviolence as a necessary condition. Here I argue that such accounts are mistaken and that civil disobedience can include violence in many aspects, primarily excepting violence directed at other persons. I base this argument on a novel understanding of civil disobedience: the special character of the practice comes from its combination of condemnation of a political practice with an expressed commitment to the political. The commitment to the political is a commitment to engaging with (...) others as co-members in the on-going political project of living together. I show how such an understanding of civil disobedience is superior to the Rawlsian strain of thought, which focuses on fidelity to law. Rawls was concerned with civil disobedience solely in the context of overriding political obligation. The project of characterizing a contestatory political practice that can be distinguished and used in a wider variety of contexts than Rawls is concerned with, including under illegitimate regimes, beyond the nation-state, or on behalf of anarchism, requires a different understanding of civil disobedience. (shrink)