A complex brain network, centered on the hippocampus, supports episodic memories throughout their lifetimes. Classically, upon memory encoding during active behavior, hippocampal activity is dominated by theta oscillations (6-10Hz). During inactivity, hippocampal neurons burst synchronously, constituting sharp waves, which can propagate to other structures, theoretically supporting memory consolidation. This 'two-stage' model has been updated by new data from high-density electrophysiological recordings in animals that shed light on how information is encoded and exchanged between hippocampus, neocortex and subcortical structures such as (...) the striatum. Cell assemblies (tightly related groups of cells) discharge together and synchronize across brain structures orchestrated by theta, sharp waves and slow oscillations, to encode information. This evolving dynamical schema is key to extending our understanding of memory processes. (shrink)

As we age, many physical, perceptual and cognitive abilities decline, which can critically impact our day-to-day lives. However, the decline of many abilities is concurrent; thus, it is challenging to disentangle the relative contributions of different abilities in the performance deterioration in realistic tasks, such as road crossing, with age. Research into road crossing has shown that aging and a decline in executive functioning is associated with altered information sampling and less safe crossing decisions compared to younger adults. However, in (...) these studies declines in age and EFs were confounded. Therefore, it is impossible to disentangle whether age-related declines in EFs impact on visual sampling and road-crossing performance, or whether visual exploration, and road-crossing performance, are impacted by aging independently of a decline in EFs. In this study, we recruited older adults with maintained EFs to isolate the impacts of aging independently of a decline EFs on road crossing abilities. We recorded eye movements of younger adults and older adults while they watched videos of road traffic and were asked to decide when they could cross the road. Overall, our results show that older adults with maintained EFs sample visual information and make similar road crossing decisions to younger adults. Our findings also reveal that both environmental constraints and EF abilities interact with aging to influence how the road-crossing task is performed. Our findings suggest that older pedestrians' safety, and independence in day-to-day life, can be improved through a limitation of scene complexity and a preservation of EF abilities. (shrink)

As a result of the publicly funded Human Genome Project (HGP), and an increasing number of private enterprises, a new form of eugenic theory and practice has emerged, differing from previous manifestations. Genetic testing has become a consumer service that may now be purchased at greatly reduced cost. While the old eugenics was pseudoscientific, the new eugenics is firmly based on DNA research. While the old eugenics focused on societal measures against the individual, the new eugenics emphasizes the family as (...) a control agent. Eugenics is now voluntary, with the promise of abortion for those afraid of producing genetically damaged children. The ethical concepts of beneficence, avoidance of maleficence, autonomy, and equity are discussed in terms of aspects of the HGP. One major issue is the need for an ethical system available to health consumers that will empower them and assist in their biogenic decisions. “The concentration on the genes implicated in cancer is only a special case of a general genomania (emphasis added) that surfaces in ... the weekly announcements in The New York Times of the location of yet another gene for another disease. The revealing rhetoric of this publicity is always the same; only the blanks need to be filled in: ‘It was announced today by scientists at [Harvard, Vanderbilt, Stanford] Medical School that a gene responsible for [some, many, a common form of] [schizophrenia, Alzheimer’s, arteriosclerosis, prostate cancer] has been located and its DNA sequence determined. This exciting research, say scientists, is the first step in what may eventually turn out to be a possible cure for this disease.’”. (shrink)

The Human Genome Project has raised many issues regarding the contributions of genetics to a variety of diseases and societal conditions. With genetic testing now easily conducted with lowered costs in nonmedical domains, a variety of privacy issues must be considered. Such testing will result in the loss of significant privacy rights for the individual. Society must now consider such issues as the ownership of genetic data, confidentiality rights to such information, limits placed on genetic screening, and legislation to control (...) genetic testing and its applications. There is often a conflict between individual rights to privacy and the need for societal protection. (shrink)

Georgia State University College of Law Professor Emerita Charity Scott quoted these words from Albert Einstein in June of 2022 as she concluded a tribute to Professor Joseph (Jay) M. Healey, one of the founding lights of health law and health law teaching. She chose the quote because she thought the words and sentiment would resonate with Jay. I repeat it because Dr. Einstein’s words capture the essence and heart of Charity’s approach to teaching, pedagogy, and life. Charity modeled, urged, (...) nudged, and taught the community of health law professors to embrace imagination and creativity. Charity’s vision has helped us be more creative and reflective teachers.2. (shrink)

Recent events demonstrated to the world a growing sense of interconnection and interdependence that will call for universal values and ethical behaviors on the part of journalists. In this article I look at journalism, likening this profession of inquiry to that of scientists, and I look at journalism ethics as a body of knowledge before identifying universal characteristics and suggesting that because of the many universal values that bond humans at whatever location, journalists should be able to agree on common (...) ethical principles. (shrink)

ABSTRACT: I argue that Socrates employs both elenchus and the method of hypothesis in the examination of the slave. I show that the elenchus is a necessary step of the inquiry. Being reduced to ignorance, Socrates tacitly uses the method of hypothesis to move the slave from ignorance to correct opinion. I tease this out from the questions Socrates asks. Although the method of hypothesis begins from a question distinct from elenchus, the solution to the problem leads the slave to (...) answer the original question. The examination shows that the two methods can be employed in a sustained inquiry. (shrink)

This is the corner into which I beheld a capitalist driven. I say capitalist. But the man was only a day-laborer, and had found it difficult to keep a small family in ordinary comfort. “Nobody is to blame but myself that I am not rich,” he said, “I have neglected to pursue the proper course. But that course was open to me, as it is to everybody in this country. The way is before every man’s eyes; it needs but the (...) will and—the brains!” So, I said, he was a capitalist. If he lay in the gutter and drank swill, he would still be a capitalist. For “out of the abundance of the heart the mouth speaketh,” even with more oracular power than out of the abundance of gold. (shrink)

The nature and aim of science, by E. Nagel.--Truth and provability, by L. Henkin.--Completeness, by L. Henkin.--Computability, by S. C. Kleene.--Necessary truth, by W. V. Quine.--What is a scientific theory? By P. Suppes.--Science and simplicity, by N. Goodman.--Scientific explanation, by C. G. Hempel.--Observation and interpretation, by N. R. Hanson.--Probability and confirmation, by H. Putnam.--Utility and acceptance of hypotheses, by I. Levi.--Space and time, by A. Grünbaum.--Problems of microphysics, by P. Feyerabend.--Aspects of explanation in biological theory, by M. Beckner.--Psychologism and methodological (...) individualism, by S. Morgenbesser.--Science, fact, and value, by M. Scriven.--The justification of induction, by M. Black. (shrink)

According to Kant, there are limits to possible hope. For example, hope for a contradiction is obviously not a logically possible hope. However, Kant goes much further and restricts possible hope to what can be possibly experienced. The line between what can and cannot be constructed as an image in space and time limits what can be thought rather than what can be merely mentioned. The apparently modern distinction between use and mention (generally attributed to Frege) is used by Kant (...) to distinguish phenomena and noumena as well as real and fictitious concepts. I propose a definition of hope that is consistent with Kant’s concept of reasonable and unreasonable hopes. I then consider some applications of this definition to Kant’s view of world peace, grace, and miracles. Despite notions of secondorder hope and transcendental hope, all possible hope lies within the limits of possible experience. (shrink)

Kant believed all and only the guilty should be punished. Other retributivists believed that only guilt should bring punishment down on a person. In neither way is the retributive theory sufficiently distinguished from utilitarianism for, on contingent grounds, the utilitarian may agree with either of these theses. The advantage of PRJ is that it brings out the difference between retributivism and utilitarianism more sharply while at the same time it manages to be a less stern and unyielding view than traditional (...) retributivism. The retributivist need not deny the core of good sense in utilitarianism, and he certainly need not deny the connection between morality and happiness. His view is that punishment does not have to produce good consequences in order to be justified. It suffices that it be deserved and that it not produce a set of clearly bad consequences. If it is true that punishment generally does have bad consequences which more than outweigh its good consequences then retributivists and utilitarians should join hands in their condemnation of punishment. The heart of the difference between the retributivist and the utilitarian is that the latter counts punishment itself as an evil but believes that, generally speaking, it is an evil which is instrumental in the production of enough good to out-weigh its intrinsic demerit. The retributivist does not regard punishment as an evil. The pain of punishment is not by itself a reason for not punishing (so long as it is not excessive). Insofar as utilitarianism is the view that no considerations but those of utility should justify punishment, it is only one side of that counterfeit coin the other side of which is Kant's dictum: “...Woe to him who creeps through the serpent-windings of Utilitarianism to discover some advantage that may discharge him from the Justice of Punishment, or even from the due measure of it....” It is irrational for Kant to rule out concern for utility but it is also irrational for the utilitarian to rule out concern for retribution.I have tried to show in this paper that the two main aspects of a plausible theory of retribution - PRJ and that the punishment should fit the crime - can be vindicated in terms of acceptable beliefs one of which is incompatible with utilitarianism (PRJ), and one of which does not derive the respect we accord it from any connection with utilitarianism. I emphasize, however, what I previously stated, that the retributivist does not have to believe that retributive justice must prevail at all costs. What is asked for is the recognition that one purpose of punishment (and not the one purpose) can justifiably have nothing to do with utility. The sensible retributivist will concede, and gladly, that there are more things in heaven and earth than retribution. (shrink)

This new edition of Soft Subversions expands, reorganizes, and develops the original 1996 publication, offering a carefully organized arrangement of essays, interviews, and short texts that present a fuller scope to Guattari's thinking from 1977 to 1985. This period encompasses what Guattari himself called the "Winter Years" of the early 1980s--the ascent of the Right, the spread of environmental catastrophe, the rise of a disillusioned youth with diminished prospects for career and future, and the establishment of a postmodernist ideology that (...) offered solutions toward adaptation rather than change--a period with discernible echoes twenty years later. Following Semiotext's release last season of the new, expanded edition of Chaosophy: Texts and Interviews 1972--1977, this book makes Guattari's central ideas and concepts fully available in the format that had been best suited to Guattari's temperament: the guerrilla-styled intervention of the short essay and interactive dialogue. This edition includes such previously unpublished, substantive texts as "Institutional Intervention" and "About Schools," along with new translations of "War, Crisis, or Life" and "The Nuclear State," interviews and essays on a range of topics including adolescence and Italy, dream analysis and schizo-analysis, Marcel Proust and Jimmy Carter, as well as invaluable autobiographical documents such as "I Am an Idea-Thief" and "So What.". (shrink)

Academic freedom re-visited, by T. V. Smith.--Human rights under the United Nations Charter, by B. V. Cohen.--The absolute, the experimental method, and Horace Kallen, by P. H. Douglas.--Some tame reflections on some wild facts, by J. Frank.--Some central themes in Horace Kallen's philosophy, by S. Ratner.--Cultural relativism and standards, by G. Boas.--The philosophy of democracy as a philosophy of history, by S. Hook.--The rational imperatives, by C. I. Lewis.--From Poe to Valéry, by T. S. Eliot.--Events and the future, by J. (...) Dewey.--Teleological explanation and teleological systems, by E. Nagel.--Chʻan (Zen) Buddhism in China: its history and method, by H. Shih.--Reconsideration of the origin and nature of perception, by A. Ames.--Horace M. Kallen: A bibliography (p. 275-277). (shrink)

First published in 2002. Routledge is an imprint of Taylor & Francis, an informa company.

This paper presents the data gathering of Matthew Fontine Maury at the U.S. Naval Observatory as pushing an epistemic boundary outside traditional laboratory walls. Maury's use and control of civilian navigators explicates the development of an astronomic epistemology deeply embedded in nineteenth century American society. In conclusion, following the movement of epistemic boundaries is offered as a guide to crucial moments in the development of a multifaceted modernity.

Given santayana's educational background in the united states, he could hardly fail to have been influenced by the pragmatic attitude, despite his protestations to the contrary. after a discussion of some of the main tenets of pragmatism, i show that they are present in the ontology of the realms of matter, truth, and spirit. while i do not make santayana into a pragmatist i do indicate the importance of pragmatism for his thought.

‘I am not yet so lost in lexicography as to forget that words are the daughters of earth, and that things are the sons of heaven. Language is only the instrument of science, and words are but the signs of ideas.’Samuel Johnson, A Dictionary of the English Language.When asked to write for a special issue of Diogenes to be entitled ‘Anthropology: The Reluctant science?’ I was reminded of a remark made to me over dinner by my friend of more than (...) fifty years, the late Eric Wolf. It was the last time I saw him: the meeting of the American Anthropological Association in Philadelphia, in November 1998. (shrink)

Not long after the completion of Michael Mann’s “quadrilogy” on The Sources of Social Power (1986–2012), social scientists began to interrogate the meaning of his concepts of “despotic” and “infrastructural” power. While we know that the former is the most evident sign of danger in times of war, less well understood is the role of infrastructural power in state/civil society relations. Most important is the ambiguous relationship between the two types of power and the possibility that—especially in times of war—infrastructural (...) power can become the vehicle for despotic ends. But infrastructural power is also reciprocal, offering firms and civil society groups channels with which to contest the state’s projects. In this article, I first explicate the different meanings that Mann gave to his concept of infrastructural power. In the second section, I turn to how the concept has been “received” in political science and historical sociology. In the third part, I argue that the main danger to American democracy in wartime lies not in its becoming a despotic state, but in the use of the state’s infrastructural channels for the exercise of despotic ends. The fourth part illustrates the complexities of infrastructural power in business/government/civil society relations in cybersecurity, which Mann—for understandable reasons—did not examine in his encompassing work. (shrink)

This book addresses the most important questions asked about higher education: What should its content be? What should we educate for, and why? What constitutes a meaningful liberal education, as distinct from mere training for a vocation? These and many other questions are addressed by Reuben Abel, M.H. Abrams, Robert L. Bartley, Ronald Berman, Also S. Bernardo, Wm. Theodore deBary, Gray Dorsey, Joseph Dunner, Nathan Glazer, Feliks Gross, Gertrude Himmelfarb, Gerald Holton, Sidney Hook, Charles Issawi, Montimer R. Kadish, Paul (...) Oscar Krissteller, paul Kurtz, Herbert I. London, Ernest Nagel, Henry R. Novotny, Frederick A. Olafson, Michael Rabin, Howard B. Radest, Joseph J. Schwab, Robert F. Sexton, Thomas Sowell, John B. Stephenson, and Miro M. Todorovich. (shrink)

This paper has had the following theses:One can't be moral without choosing a particular moral style.A style is a specific balance of Type I and Type II risks of error.There are just four alternative moral patterns, defined in terms of beneficiaries.Sacrifice is the basic moral relation.A moral style is a balance of risks of error in choosing beneficiaries.The categorical imperative limits the range of styles that can be accepted as moral.One's moral style is not chosen by logic but by feelings, (...) just as one chooses art. (shrink)

If the octopus were conscious, what would its consciousness be like? This paper investigates the structure octopus consciousness, if existent, is likely to exhibit. Presupposing that the configuration of an organism’s consciousness is correlated with that of its nervous system, it is unlikely that the structure of the sort of conscious experience that would arise from the highly decentralized octopus nervous system would bear much resemblance to those of vertebrates. In particular, octopus consciousness may not exhibit unity, which has long (...) been assumed to be the normal or default structure of consciousness. The octopus nervous system is characterized by the following features: its three anatomically distinct components have extensive functional autonomy and little intercommunication; much of the sensory processing and motor control routines—that in vertebrates are localized in the brain—take place within the peripheral arm nervous system; and proprioception and somatotopic representation are significantly downplayed. In this paper, I present the octopus as a highly successful biological organism in which it is plausible that the unified model of consciousness does not hold. (shrink)

In 1889, the German philologist Friedrich Blass isolated a section of Chapter 20 from Iamblichus’ Exhortation to Philosophy (mid- or late 3rd Century CE) as an extract from a lost sophistic or philosophical treatise from the late 5th Century BCE. In this article, I introduce the text, which is now known as 'Anonymus Iamblichi' (or 'the anonymous work preserved in Iamblichus') by appeal to its two main contexts (source preservation and original historical composition), translate and discuss all eight surviving fragments (...) in their entirety, and provide some closing remarks about its importance to this history of democratic thought. The text itself presents a series of very carefully interwoven arguments concerning the three “parts” of excellence (ἀρετή) – wisdom, courage, and eloquence – and their successful application in society. In the course of presenting this case, Anonymus Iamblichi comments on the conditions under which one should learn to be excellent (Fragments 1-2) and the ends to which one should direct one’s excellence (Fragments 3-4); he provides an anthropological discussion of the weaknesses of human psychology and its effects on the good man (Fragments 5-6) and an hypothetical thought experiment concerning the “Superman” (which naturally solicits comparison with Nietzsche’s übermensch) and his inability to overcome the multitude in a lawless state (Fragments 6 and 8); and a positive defense of law and justice, reflecting a pro-democratic philosophical perspective (Fragments 7-8) – a rara avis indeed in ancient philosophy. (shrink)

When did kosmos come to mean *the* kosmos, in the sense of ‘world-order’? I venture a new answer by examining later evidence often underutilised or dismissed by scholars. Two late doxographical accounts in which Pythagoras is said to be first to call the heavens kosmos (in the anonymous Life of Pythagoras and the fragments of Favorinus) exhibit heurematographical tendencies that place their claims in a dialectic with the early Peripatetics about the first discoverers of the mathematical structure of the universe. (...) Likewise, Xenophon and Plato refer to ‘wise men’ who nominate kosmos as the object of scientific inquiry into nature as a whole and the cosmic ‘communion’ (koinônia) between all living beings, respectively. Again, later testimonies help in identifying the anonymous ‘wise men’ by associating them with the Pythagoreans and, especially, Empedocles. As Horky argues, not only is Empedocles the earliest surviving source to use kosmos to refer to a harmonic ‘world-order’ and to illustrate cosmic ‘communities’ between oppositional pairs, but also his cosmology realises the mutual correspondence of these aspects in the cycle of love and strife. Thus, if later figures posited Pythagoras as the first to refer to the universal ‘world-order’ as the kosmos, they did so because they believed Empedocles to have been a Pythagorean natural scientist, whose combined focus on cosmology and ethics exemplified a distinctively Pythagorean approach to philosophy. (shrink)

Wayfinding is generally understood as the process of purposefully navigating to distant and non-visible destinations. Within this broad framework, uninformed searching entails finding one’s way to a target destination, in an unfamiliar environment, with no knowledge of its location. Although a variety of search strategies have been previously reported, this research was largely conducted in the laboratory or virtual environments using simplistic and often non-realistic situations, raising questions about its ecological validity. In this study, we explored how extant findings on (...) searching translate to a real-world environment, using a phenomenologically informed experiment. Our findings demonstrate a previously undescribed complex and dynamic interplay of different search strategies. Importantly, our results reveal that: (i) the presence of other people is importantly entangled with the process of searching; and (ii) people frequently probe and switch between search strategies based on local environmental characteristics. Together, our results reveal that search behaviour is critically dependent on environmental features and that searching in complex real-world settings should not be conceptualised as depending on a simple singular strategy. This raises questions about the dominance of laboratory-based experiments and their narrow cognitivist framework, highlighting the value of studying wayfinding in the real world. (shrink)

Objective To review the way consciousness is operationalised in contemporary research, discuss strengths and weaknesses of current approaches and propose new measures. Method We first reviewed the literature pertaining to the phenomenal character of visual and self-consciousness as well as awareness of visual stimuli. We also reviewed more problematic cases of dreams and animal consciousness, specifically that of octopuses. Results Despite controversies, work in visual and self consciousness is highly developed and there are notable successes. Cases where experiences are not (...) induced, such as dreams, and where no verbal report is possible, such as when we study purported experiences of octopuses, are more challenging. It is difficult to be confident about the reliability and validity of operationalisations of dreams. Although this is a general concern about the measuring consciousness, it is not a sufficiently severe concern to completely undermine the work reviewed on vision and self-consciousness. It is more difficult to see how the good work on human psychology can be applied to non-human animals, especially those with radically different nervous systems, such as octopuses. Given the limitations of report-based operationalisations of consciousness, it is desirable to develop non-report-based measures, particularly for phenomenal qualities. We examine a number of possibilities and offer two possible approaches of varying degrees of practicality, the first based on combining quality space descriptions of phenomenal qualities and the notion of a “neural activation space” inherited from connectionist A.I., the second being a novel match to target approach Conclusion Consciousness is a multifacted phenomenon and requires a variety of operationalisations to be studied. (shrink)

SummaryIn June 1913 the 18-year-old Norbert Wiener presented to Harvard University a doctoral thesis comparing the logical systems of Schröder and Russell, with special reference to their treatment of relations. Shortly afterwards he visited Russell in Cambridge (England) and showed him a copy of the thesis. Russell wrote out some comments, to which Wiener replied.None of these documents has been published. In this paper I summarise the contents of Wiener's thesis, and describe and quote from the subsequent (...) discussion with Russell. I preface the account with some remarks on the personal relationship of Wiener and Russell, and conclude it with the description of the location of the various documents cited. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Reviewed by:The Texts of Early Greek Philosophy: The Complete Fragments and Selected Testimonies of the Major Presocratics ed. by Daniel W. GrahamPhillip Sidney HorkyDaniel W. Graham, ed. and trans. The Texts of Early Greek Philosophy: The Complete Fragments and Selected Testimonies of the Major Presocratics. Parts 1 and 2. Cambridge: Cambridge University Press, 2010. xvii + 1020 pp. Cloth, $180; paper, $99.It has been nearly 30 years since (...) Malcolm Schofield revised and updated the first edition of the venerable translation of fragments of the Presocratic philosophers by J. E. Raven and G. S. Kirk, originally compiled in 1957 in the wake of the sixth and final edition of Diels-Kranz’s (DK) Die Fragmente der Vorsokratiker (Berlin 1951–52). And in the time since Kirk-Raven-Schofield’s second edition of The Presocratic Philosophers (KRS), in 1983, several translations of selected portions of the collected fragments of early Greek philosophy into English have appeared: Jonathan Barnes’ Early Greek Philosophy (London 1987), drawn from his revised edition of The Presocratic Philosophers (London 1982), Robin Waterfield’s The First Philosophers (Oxford 2000), and Richard McKirahan’s Philosophy Before Socrates (Indianapolis, Ind. 2011). Students of Presocratic philosophy and the early intellectual history of Greece have profited immensely from the contributions made by KRS, Barnes, Waterfield, and McKirahan. Yet none of these volumes, despite their intellectual courage, philosophical acumen, and deep learning, could provide what Diels and Kranz had given German audiences in the middle of the twentieth century: a bilingual translation of the complete fragments of and selected testimonia concerning those important intellectual antecedents of Plato (including the Sophists).On the eve of Professor Schofield’s retirement, then, Daniel W. Graham has produced a two-volume translation and commentary on the complete fragments and selected testimonies of the “major Presocratics.” It should be mentioned that this is not an easy or even enviable project. Presocratic studies has undergone a renaissance of sorts since the last edition of KRS in 1983, and new critical editions and translations into English of individual figures (J. Lesher’s Xenophanes of Colophon [Toronto 1992]; C. A. Huffman’s editions of Philolaus of Croton [Cambridge 1993] and Archytas of Tarentum [Cambridge 2005]; the editions of Anaxagoras by P. Curd [Toronto 2007] and D. Sider [Sankt Augustin 2005]; C. C. W. Taylor’s The Atomists: Leucippus and Democritus [Toronto 1999]; G. J. Pendrick’s Antiphon the Sophist [Cambridge 2002]); new editions of papyrus discoveries (A. Martin and O. Primavesi’s L’Empédocle de Strasbourg [Berlin 1999], incorporated into B. Inwood’s The Poem of Empedocles [Toronto 2001] and the long-awaited “official” text of The Derveni Papyrus by T. Kouremenos, G. Parássoglou, and K. Tsantsanoglou [Firenze 2006]); and major critical studies [End Page 149] of Presocratic philosophers and/or philosophy (too numerous to name here) have significantly modified the landscape of the study of early Greek philosophy. In the midst of this renaissance, one has seen the critical approaches used to evaluate Presocratic thought develop into a perfect storm, with a barrage of new approaches concerning historiography, interpretation, reception, and contextualization, now considered legitimate in the assessment and evaluation of those thorny and often obscure fragments of the early Greek speculators. Presocratic studies has become contested ground, and the idea of producing a two-volume set that might update, stabilize, and make DK accessible for an English-reading audience, despite the protestations of the few (xiii), must be considered nothing less than wholly welcome. Given his demonstrated comprehension of the field of Presocratic studies at large—he has produced two broad-ranging monographs, edited several general volumes, and offered many article-length contributions on early Greek philosophy—Graham would seem to be the perfect choice for the job.What remains to be seen, then, is whether the volumes as we have them rise to the challenge of the project. The results, I think, are mixed. I will first discuss those aspects of The Texts of Early Greek Philosophy that seem more successful and testify to the value that such a collection offers to educators and students alike. Then I will examine some areas where the volumes do not quite reach the heights promised by the... (shrink)

We hypothesize that effective collaboration is facilitated when individuals and environmental components form a synergy where they work together and regulate one another to produce stable patterns of behavior, or regularity, as well as adaptively reorganize to form new behaviors, or irregularity. We tested this hypothesis in a study with 32 triads who collaboratively solved a challenging visual computer programming task for 20 min following an introductory warm‐up phase. Multidimensional recurrence quantification analysis was used to examine fine‐grained (i.e., every 10 (...) s) collective patterns of regularity across team members' speech rate, body movement, and team interaction with the shared user interface. We found that teams exhibited significant patterns of regularity as compared to shuffled baselines, but there were no systematic trends in regularity across time. We also found that periods of regularity were associated with a reduction in overall behavior. Notably, the production of irregular behavior predicted expert‐coded metrics of collaborative activity, such as teams' ability to construct shared knowledge and effectively negotiate and coordinate execution of solutions, net of overall behavioral production and behavioral self‐similarity. Our findings support the theory that groups can interact to form interpersonal synergies and indicate that information about system‐level dynamics is a viable way to understand and predict effective collaborative processes. (shrink)

This article is about structural realism, historical continuity, laws of nature, and \emph{ceteris paribus} clauses. Fresnel's Laws of optics support Structural Realism because they are a scientific structure that has survived theory change. However, the history of Fresnel's Laws which has been depicted in debates over realism since the 1980s is badly distorted. Specifically, claims that J.~C. Maxwell or his followers believed in an ontologically-subsistent electromagnetic field, and gave up the aether, before Einstein's \emph{annus mirabilis} in 1905 are indefensible. Related (...) claims that Maxwell himself did not believe in a luminiferous aether are also indefensible. This paper corrects the record. In order to trace Fresnel's Laws across significant ontological changes, they must be followed past Einstein into modern physics and nonlinear optics. I develop the philosophical implications of a more accurate history, and analyze Fresnel's Laws' historical trajectory in terms of dynamic ceteris paribus clauses. Structuralists have not embraced ceteris paribus laws, but they continue to point to Fresnel's Laws to resist anti-realist arguments from theory change. Fresnel's Laws fit the standard definition of a ceteris paribus law as a law applicable only in particular circumstances. Realists who appeal to the historical continuity of Fresnel's Laws to combat anti-realists must incorporate ceteris paribus laws into their metaphysics. (shrink)

Two articles by Lewis Feuer caught my attention in the '40s when 1 was wondering, asa student physicist, about the relations of physics to philosophy and to the world in turmoil. One was his essay on 'The Development of Logical Empiricism' (1941), and the other his critical review of Philipp Frank's biography of Einstein, 'Philosophy and the Theory of Relativity' (1947). How extraordinary it was to find so intelligent, independent, critical, and humane a mind; and furthermore he went further, as (...) I soon realized when I looked for his name on other publications. I recall arguing with myself over his exploration of 'Indeterminacy and Economic Development' (1948), and even more when I read his 'Dialectical Materialism and Soviet Science' (1949). More papers, and then the fascinating, sometimes irritating, always insightful, books. His monograph on Psychoanalysis and Ethics 1955, the beautiful sociological and humanist study of Spinoza and the Rise of Liberalism (1958), his essays on 'The Social Roots of Einstein's Theory of Relativity' (1971) together with the book on Einstein and the Genera tions of Science (1974), the splendid reader from the works of Marx and Engels, Basic Writings on Politics and Philosophy (1959) which was a major text of the '60s, the stimulating essays on the social formation which seems to have been required for a modern scientific movement to develop, set forth most convincingly in The Scientific Intellectual (1963). (shrink)

The human masticatory system is a complex functional unit characterized by a multitude of skeletal components, muscles, soft tissues, and teeth. Muscle activation dynamics cannot be directly measured on live human subjects due to ethical, safety, and accessibility limitations. Therefore, estimation of muscle activations and their resultant forces is a longstanding and active area of research. Reinforcement learning (RL) is an adaptive learning strategy which is inspired by the behavioral psychology and enables an agent to learn the dynamics of an (...) unknown system via policy-driven explorations. The RL framework is a well-formulated closed-loop system where high capacity neural networks are trained with the feedback mechanism of rewards to learn relatively complex actuation patterns. In this work, we are building on a deep RL algorithm, known as the Soft Actor-Critic, to learn the inverse dynamics of a simulated masticatory system, i.e., learn the activation patterns that drive the jaw to its desired location. The outcome of the proposed training procedure is a parametric neural model which acts as the brain of the biomechanical system. We demonstrate the model’s ability to navigate the feasible three-dimensional (3D) envelope of motion with sub-millimeter accuracies. We also introduce a performance analysis platform consisting of a set of quantitative metrics to assess the functionalities of a given simulated masticatory system. This platform assesses the range of motion, metabolic efficiency, the agility of motion, the symmetry of activations, and the accuracy of reaching the desired target positions. We demonstrate how the model learns more metabolically efficient policies by integrating a force regularization term in the RL reward. We also demonstrate the inverse correlation between the metabolic efficiency of the models and their agility and range of motion. The presented masticatory model and the proposed RL training mechanism are valuable tools for the analysis of mastication and other biomechanical systems. We see this framework’s potential in facilitating the functional analyses aspects of surgical treatment planning and predicting the rehabilitation performance in post-operative subjects. (shrink)