Bacterial populations are heterogeneous, which in many cases can provide a selective advantage during changes in environmental conditions. In some instances, heterogeneity exists at the genetic level, in which significant allelic variation occurs within a population seeded by a single cell. In other cases, heterogeneity exists due to phenotypic differences within a clonal, genetically identical population. A variety of mechanisms can drive this latter strategy. Stochastic fluctuations can drive differential gene expression, but heterogeneity in gene expression can also be driven (...) by environmental changes sensed by individual cells residing in distinct locales. Utilizing multiple single cell approaches, workers have started to uncover the extent of heterogeneity within bacterial populations. This review will first describe several examples of phenotypic and genetic heterogeneity, and then discuss many single cell approaches that have recently been applied to define heterogeneity within bacterial populations. (shrink)

Most approaches to animal ethics ground the moral standing of nonhumans in some appeal to their capacities for intelligent autonomy or mental sentience. _Corporal Compassion _emphasizes the phenomenal and somatic commonality of living beings; a philosophy of body that seeks to displace any notion of anthropomorphic empathy in viewing the moral experiences of nonhuman living beings. Ralph R. Acampora employs phenomenology, hermeneutics, existentialism and deconstruction to connect and contest analytic treatments of animal rights and liberation theory. In doing so, (...) he focuses on issues of being and value, and posits a felt nexus of bodily being, termed symphysis, to devise an interspecies ethos. Acampora uses this broad-based bioethic to engage in dialogue with other strains of environmental ethics and ecophilosophy. _Corporal Compassion_ examines the practical applications of the somatic ethos in contexts such as laboratory experimentation and zoological exhibition, and challenges practitioners to go beyond recent reforms and look to a future beyond exploitation or total noninterference--a posthumanist culture that advocates caring in a participatory approach. (shrink)

Max Hallman has put forward an interpretation of Nietzsche’s philosophy according to which Nietzsche is a prototypical deep ecologist. In reply, I dispute Hallman’s main interpretive claim as well as its ethical and exegetical corollaries. I hold that Nietzsche is not a “biospheric egalitarian,” but rather an aristocratically individualistic “high humanist.” A consistently naturalistic transcendentalist, Nietzsche does submit a critique of modernity’s Christian-inflected anthropocentrism (pace Hallman), and yet—in his later work—he endorses exploitation in the quest for nobility (contra Hallman). I (...) conclude thatecophilosophers need to exercise hermeneutical caution in any attempt to appropriate Nietzsche for environmentally ethical designs, lest they illegitimately ventriloquize their own moral voices into an authoritative but alien mouthpiece. (shrink)

We emphasize the feature of Webb's presentation that bears most directly on contemporary research with real animals. Many neuroscience modelers erroneously conclude that a model that performs like an animal must have achieved this goal through processes analogous with those used by the animal. A simulation failure justifies rejecting a model, but success does not justify acceptance. However, an important benefit of models, successful or otherwise, is to stimulate new research.

Ralph R. Acampora - Anthropocentrism and Its Discontents: The Moral Status of Animals in the History of Western Philosophy - Journal of the History of Philosophy 44:3 Journal of the History of Philosophy 44.3 480-481 Gary Steiner. Anthropocentrism and Its Discontents: The Moral Status of Animals in the History of Western Philosophy. Pittsburgh: University of Pittsburgh Press, 2005. Pp. ix + 332. Cloth, $37.50. In this text Steiner surveys the history of doctrines, attitudes, and beliefs about the ethical standing (...) of animals. Unsurprisingly, he finds that the mainstream of thought in this area manifests "an underlying logic: that all and only human beings are worthy of moral consideration, because all and only human beings are rational and endowed with language" . This neatly expresses the anthropocentrism identified in the.. (shrink)

This dissertation is an attempt to show that, and how, an inter-species morality of compassion may be grounded reasonably in a phenomenology of body. It provides a literature survey of relevant works and authors, largely drawn from the modern European traditions of philosophic existentialism, phenomenology, and hermeneutics . The ontology and axiology presupposed by a somatically based bioethic are outlined in advance of the latter's presentation . Relevance of the embodied bioethic to actual affairs is demonstrated through exercises in practical (...) philosophy . An extended summary, as well as comparisons with other positions or outlooks and suggestions for further reflection or research, are also supplied . Appropriate propaedeutics, furnishing preliminary context for the project, can be found in the introduction. (shrink)

Rachlin's substantive points about the relationship between altruism and self-control are obscured by simplistic and outdated portrayals of evolutionary psychology in relation to learning theory.

'A Nietzschean Bestiary' gathers essays treating the most vivid & lively animal images in Nietzsche's work, such as the howling beast of prey, Zarathustra's laughing lions, & the notorious blond beast.

Behavioral momentum theory has evolved within the realm of operant conditioning. The thought-provoking momentum metaphor equates the strength of an operant response with its resistance to change and preference (i.e., choice) for that response over other available responses. Whereas baseline response rate (velocity in the metaphor) is assumed to be largely influenced by the response-reinforcer contingency, resistance to change and preference are assumed to reflect an intervening variable called behavioral mass, which is determined primarily by the stimulus-reinforcer relationship. This invites (...) the question of how well the momentum metaphor applies to the stimulus-reinforcer relationships of traditional Pavlovian paradigms. Presumably, a correspondence exists between behavioral mass and the notion of associative strength in the associative learning literature. Although response rate has little meaning in the trialwise structure of classical (i.e., Pavlovian) conditioning, response probability or magnitude might be regarded metaphorically as velocity. Momentum theory suggests that resistance to change (e.g., extinction) is a better indicator of associative strength than is response probability or magnitude. Therefore, variables that strengthen Pavlovian learning should influence resistance to extinction of conditioned responding in a similar manner. Moreover, it is important to assess momentum theory outside of strictly operant paradigms, particularly because in clinical settings many common disorders (e.g., phobias) and their therapies (e.g., cue exposure) are thought to be classically conditioned. (shrink)

Strangers to Nature brings together many of the leading scholars who are working to redefine and expand the discourse on animal ethics. This volume will engage both scholars and lay-people by revealing the breadth of theorizing about the human/non-human animal relationship that is currently taking place.

We argue that the propositional and link-based approaches to human contingency learning represent different levels of analysis because propositional reasoning requires a basis, which is plausibly provided by a link-based architecture. Moreover, in their attempt to compare two general classes of models (link-based and propositional), Mitchell et al. refer to only two generic models and ignore the large variety of different models within each class.

Cooperation can evolve in the context of cognitive activities such as perception, attention, memory, and decision making, in addition to physical activities such as hunting, gathering, warfare, and childcare. The social insects are well known to cooperate on both physical and cognitive tasks, but the idea of cognitive cooperation in humans has not received widespread attention or systematic study. The traditional psychological literature often gives the impression that groups are dysfunctional cognitive units, while evolutionary psychologists have so far studied cognition (...) primarily at the individual level. We present two experiments that demonstrate the superiority of thinking in groups, but only for tasks that are sufficiently challenging to exceed the capacity of individuals. One of the experiments is in a brain-storming format, where advantages of real groups over nominal groups have been notoriously difficult to demonstrate. Cognitive cooperation might often operate beneath conscious awareness and take place without the need for overt training, as evolutionary psychologists have stressed for individual-level cognitive adaptations. In general, cognitive cooperation should be a central subject in human evolutionary psychology, as it already is in the study of the social insects. (shrink)

The statistical properties of a single quantum object and an ensemble of independent such objects are considered in detail for two-level systems. Computer simulations of dynamic zero-point quantum fluctuations for a single quantum object are reported and compared with analytic solutions for the ensemble case.

Studies on why small and medium enterprises engage in pro-environmental behavior suggest that managers’ environmental responsibility plays a relatively greater role than competitiveness and legitimacy-seeking. These categories of drivers are mostly considered independent of each other. Using survey data and comparative case studies of wine firms in South Africa, this study finds that managers’ environmental responsibility is indeed the key driver in a context where state regulation hardly plays any role in regulating dispersed, rural firms. However, especially proactive firms are (...) also characterized by expectations of competitiveness gains. The authors thus emphasize the role of institutional context and potential interaction effects between these drivers in explaining the reasons why SMEs engage in pro-environmental behavior in developing countries. (shrink)

In this paper, we discuss the macroscopic quantum behavior of simple superconducting circuits. Starting from a Lagrangian for electromagnetic field with broken gauge symmetry, we construct a quantum circuit model for a superconducting weak link (SQUID) ring, together with the appropriate canonical commutation relations. We demonstrate that this model can be used to describe macroscopic excitations of the superconducting condensate and the localized charge states found in some ultrasmall-capacitance weak-link devices.