Based on the Gallahue Conference on Religion and Psychiatry which was held at Princeton Theological Seminary in 1963, and which took as its topic "Will and Willing," this book sets out from the fact that although for a long time unfashionable, questions are now being raised which seem to involve some reconsideration of will and willing within the fields of psychology, psychiatry, and theology. It offers a lively presentation of the issues discussed by the twenty four invited participants in small (...) face to face conferences: Modes of Approach; What does "to will" mean? New Light on Willing from Psychoanalysis? and Does the Will have Power? Opening with a historical survey which argues the necessity of an empirical base, a series of papers by scholars in the fields of psychology, clinical psychiatry, and theology who participated in the conference deal with the problem of will and willing successively within the framework of Heidegger's existentialist philosophy, as handled in traditional and contemporary theology, and as newly approached via the findings of the behavioral sciences; a long and intriguing study of the computer under the title "Willing in Androids" argues that willing and acts of choosing by humans are like the selecting and execution of complicated subroutines in computers; and a final chapter by editor James N. Lapsley of Princeton Theological Seminary, drawing together the threads of discussion in the context of a historical and psychological study of the "self," argues that the whole conception of will and willing is of sufficient scope and significance to warrant renewed consideration.--R. D. (shrink)

Beginning from a psychological point of view, the author moves into a strictly phenomenological study of the organization of perception and of consciousness. His thesis is that every field of consciousness has three domains, viz., a theme, a field or background, and a fringe area, each of which has its own type of organization. The work breaks some new ground in phenomenology and contains a sketch of the ontological implications of the study.--R. D. G.

Offers a comprehensive nonmathematical treatment regarding the design and analysis of experiments, focusing on basic concepts rather than calculation of technical details. Much of the discussion is in terms of examples drawn from numerous fields of applications. Subjects include the justification and practical difficulties of randomization, various factors occurring in factorial experiments, selecting the size of an experiments, different purposes for which observations may be made and much more.

B. R. Frieden uses a single procedure, called extreme physical information, with the aim of deriving 'most known physics, from statistical mechanics and thermodynamics to quantum mechanics, the Einstein field equations and quantum gravity'. His method, which is based on Fisher information, is given a detailed exposition in this book, and we attempt to assess the extent to which he succeeds in his task.

The work of the lay Catholic philosopher Jacques Maritain continues to provoke and inspire readers to engage in a Thomistic approach to many of the questions facing the world today. Maritain’s wide-ranging thought touched on many fields, including aesthetics, anthropology, educational theory, moral philosophy, and ethics, as well as Thomism and its relationship to other philosophical stances._ In _Being in the World: A Quotable Maritain Reader_, Mario O. D’Souza, C.S.B., has selected seven hundred and fifty of the most salient quotations (...) found in the English translations of fifty-four works by Jacques Maritain. Organized into forty thematic chapters, ordered alphabetically, the book serves as an overview of the areas that Maritain's writings addressed. By referring to entries in _Being in the World_, readers can quickly locate key passages in Maritain’s writing on a given topic and then turn elsewhere to the full texts for more in-depth study. Complete with a detailed index of key terms, the _Reader _will be an essential reference tool for the study of Maritain in English. "Fr. Mario O. D'Souza's careful selection from the works of Jacques Maritain provides the reader with an invaluable sampling of Maritain's extensive philosophical work. In it, we find examples of Maritain's almost lyrical gift of expression as well as of his trenchant wit. More than a scholarly contribution, the volume also ably serves as an introduction and entrance into Maritain's corpus." — William Sweet, St. Francis Xavier University, Canada_. (shrink)

A laboratory-testable, solid-state Maxwell demon is proposed that utilizes the electric field energy of an open-gap p-n junction. Numerical results from a commercial semiconductor device simulator (Silvaco International–Atlas) verify primary results from a 1-D analytic model. Present day fabrication techniques appear adequate for laboratory tests of principle.

© 2016 Regents of the University of California.The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 3,062 new measurements from 721 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, leptons, quarks, mesons, and baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. All the particle properties and search limits are listed in Summary Tables. We also give numerous (...) tables, figures, formulae, and reviews of topics such as Higgs Boson Physics, Supersymmetry, Grand Unified Theories, Neutrino Mixing, Dark Energy, Dark Matter, Cosmology, Particle Detectors, Colliders, Probability and Statistics. Among the 117 reviews are many that are new or heavily revised, including those on Pentaquarks and Inflation. The complete Review is published online in a journal and on the website of the Particle Data Group. The printed PDG Book contains the Summary Tables and all review articles but no longer includes the detailed tables from the Particle Listings. A Booklet with the Summary Tables and abbreviated versions of some of the review articles is also available. (shrink)

This volume is a collection of original essays by eminent philosophers written for R. B. Braithwaite's eightieth birthday to celebrate his work and teaching. In one way or another, all the essays reflect his central concern with the impact of science on our beliefs about the world and the responses appropriate to that. Together they testify to the signal importance of his contributions in areas of philosophy bearing on this concern: the philosophy of science, especially of the statistical sciences, theories (...) of belief and of probability, decision theory and games theory. This book, which includes a full bibliography of Professor Braithwaite's work, will interest advanced students and professionals in the fields of philosophy and psychology. (shrink)

SummaryEarly geological investigations in the St David's area (Pembrokeshire) are described, particularly the work of Murchison. In a reconnaissance survey in 1835, he regarded a ridge of rocks at St David's as intrusive in unfossiliferous Cambrian; and the early Survey mapping (chiefly the work of Aveline and Ramsay) was conducted on that assumption, leading to the publication of maps in 1845 and 1857. The latter represented the margins of the St David's ridge as ‘Altered Cambrian’. So the supposedly intrusive ‘syenite’ (...) was regarded as younger, and there was no Precambrian. These views were challenged by a local doctor, Henry Hicks, who developed an idea of the ex-Survey palaeontologist John Salter that the rocks of the ridge were stratified and had formed a Precambrian island, round which Cambrian sediments (now confirmed by fossil discoveries) had been deposited. Hicks subsequently proposed subdivision of his Precambrian into ‘Dimetian’, ‘Pebidian’, and (later) ‘Arvonian’, and he attempted correlations with rocks in Shropshire, North Wales, and even North America, seeking to develop the neo-Neptunist ideas of Sterry Hunt. The challenge to the Survey's work was countered in the 1880s by the Director General, Geikie, who showed that Hicks's idea of stratification in the Dimetian was mistaken. A heated controversy developed, several amateur geologists, supported by a group of Cambridge Sedgwickians, forming a coalition of ‘Archaeans’ against the Survey. Geikie was supported by Lloyd Morgan. Attention focused particularly on Ogof Lle-sugn Cave and St Non's Arch, with theory/controversy-ladenness of observations evident on both sides. Evidence from an eyewitness student record of a Geological Society meeting reveals the ‘sanit`ized’ nature of the official summary of the debate in QJGS. Field mapping early in the twentieth century by J. F. N. Green allowed a compromise consensus to be achieved, but Green's evidence for unconformity between the Cambrian and the Dimetian, obtained by excavation, can no longer be verified, and his consensual history of the area may need revision. Unconformity between the Cambrian and the Pebidian tuffs is not in doubt, however, and Precambrian at St David's is accepted. The study exhibits features of geological controversy and the British geological community in the nineteenth century. It also furnishes a further instance of the great influence of Murchison in nineteenth-century British geology and the side-effects of his controversy with Sedgwick. (shrink)

Understanding terrestrial carbon metabolism is critical because terrestrial ecosystems play a major role in the global carbon cycle. Furthermore, humans have severely disrupted the carbon cycle in ways that will alter the climate system and directly affect terrestrial metabolism. Changes in terrestrial metabolism may well be as important an indicator of global change as the changing temperature signal. Improving our understanding of the carbon cycle at various spatial and temporal scales will require the integration of multiple, complementary and independent methods (...) that are used by different research communities. Tools such as air sampling networks, inverse numerical methods, and satellite data allow us to study the strength and location of the global- and continental-scale carbon sources and sinks. Bottom-up studies provide estimates of carbon fluxes at finer spatial scales and examine the mechanisms that control fluxes at the ecosystem, landscape, and regional scales. Bottom-up approaches include comparative and process studies that provide the necessary mechanistic information to develop and validate terrestrial biospheric models. An iteration and reiteration of top-down and bottom-up approaches will be necessary to help constrain measurements at various scales. We propose a major international effort to coordinate and lead research programs of global scope of the carbon cycle. (shrink)

This paper explores an emerging sub-field of both empirical bioethics and experimental philosophy, which has been called “experimental philosophical bioethics” (bioxphi). As an empirical discipline, bioxphi adopts the methods of experimental moral psychology and cognitive science; it does so to make sense of the eliciting factors and underlying cognitive processes that shape people’s moral judgments, particularly about real-world matters of bioethical concern. Yet, as a normative discipline situated within the broader field of bioethics, it also aims to contribute (...) to substantive ethical questions about what should be done in a given context. What are some of the ways in which this aim has been pursued? In this paper, we employ a case study approach to examine and critically evaluate four strategies from the recent literature by which scholars in bioxphi have leveraged empirical data in the service of normative arguments. (shrink)

An account is given of early geological researches in the Malverns, the Church Stretton area, and the Wrekin. The reconnaissance work of Murchison suggested that each of these areas had Silurian sediments, intruded by igneous rocks . The early Survey maps were compiled on this theoretical basis, with the result that the Silurian sediments were regarded as the oldest rocks in Shropshire and the Malverns. Local geologists, working in the three areas, and with sufficient time to study the exposures in (...) detail, began to develop the idea of ‘islands’ of Precambrian rock , having younger sediments deposited thereon. This Archaean model was taken up and actively developed, and the stratigraphical details worked out, with the island model being gradually modified. Debates were stronger between members of the ‘Archaean’ fraternity than with the Survey. Traces of trilobite remains were found by Callaway at Comley, near Caer Caradoc, and were identified by Lapworth as Olenellus, enabling the underlying Wrekin Quartzite to be established as the base of the Cambrian, in agreement with ideas developed in North America and Scandinavia. Arguments are detailed concerning the relative ages of the ‘Uriconian’ and ‘Longmyndian’ rocks, and their constituent units. Both were agreed to be Precambrian, but the evidence in terms of field mapping, in relation to the Wrekin Quartzite, is not complete. The problems of stratigraphical work in unfossiliferous rocks are displayed, and also the efforts to achieve correlations with areas such as Pembrokeshire and Anglesey are described. Though consensus has been reached on the Precambrian status of the Malvernian, Uriconian and Longmyndian rocks, radiometric age determinations and other evidence throw doubt on some aspects of the consensus, and research continues. (shrink)

R. Renehan's ingenious solutions to the problems of Symphosius 42. 1 and Anth. Lat. 207 in this journal , 471 f.) are much to be welcomed. On the other hand, I do not think that his defence of the manuscript reading in Anth. Lat. 24. 3 marcent post rorem violae, rosa perdit odorem holds water. Taking rorem as = rorem marinum he explains that ‘the poet is not presenting us with a piece of botanical information about the relative seasons of (...) the violet and rosemary; he means rather that all flowers wither and fade’. Actually, however, the poet on this showing does present information; and whether the information is botanically correct or not , that is an odd way to make his point. Stranger still is his choice of rosemary out of all the fading flowers of field and garden. It was bound to be I misunderstood. As Renehan indicates, ros = ros marinus is supported only by Virg. Georg. 2. 212–13, where the identity has been doubted, and Plin. HN 24. 100, where ex rore supra dicto refers back to ros marinum in 99. Renehan may well be the first reader not to take rorem as dew. And an evergeen shrub makes a singularly unfortunate illustration of floral decay, even though the shrub does produce a flower. Pliny classes it with herbs. (shrink)

R. Renehan's ingenious solutions to the problems of Symphosius 42. 1 and Anth. Lat. 207 in this journal, 471 f.) are much to be welcomed. On the other hand, I do not think that his defence of the manuscript reading in Anth. Lat. 24. 3 marcent post rorem violae, rosa perdit odorem holds water. Taking rorem as = rorem marinum he explains that ‘the poet is not presenting us with a piece of botanical information about the relative seasons of the (...) violet and rosemary; he means rather that all flowers wither and fade’. Actually, however, the poet on this showing does present information; and whether the information is botanically correct or not, that is an odd way to make his point. Stranger still is his choice of rosemary out of all the fading flowers of field and garden. It was bound to be I misunderstood. As Renehan indicates, ros = ros marinus is supported only by Virg. Georg. 2. 212–13, where the identity has been doubted, and Plin. HN 24. 100, where ex rore supra dicto refers back to ros marinum in 99. Renehan may well be the first reader not to take rorem as dew. And an evergeen shrub makes a singularly unfortunate illustration of floral decay, even though the shrub does produce a flower. Pliny classes it with herbs. (shrink)

Detection of deception and confirmation of truth telling with conventional polygraphy raised a host of technical and ethical issues. Recently, newer methods of recording electromagnetic signals from the brain show promise in permitting the detection of deception or truth telling. Some are even being promoted as more accurate than conventional polygraphy. While the new technologies raise issues of personal privacy, acceptable forensic application, and other social issues, the focus of this paper is the technical limitations of the developing technology. Those (...) limitations include the measurement validity of the new technologies, which remains largely unknown. Another set of questions pertains to the psychological paradigms used to model or constrain the target behavior. Finally, there is little standardization in the field, and the vulnerability of the techniques to countermeasures is unknown. Premature application of these technologies outside of research settings should be resisted, and the social conversation about the appropriate parameters of its civil, forensic, and security use should begin. (shrink)

Journal of the History of Biology provides a fifty-year long record for examining the evolution of the history of biology as a scholarly discipline. In this paper, we present a new dataset and preliminary quantitative analysis of the thematic content of JHB from the perspectives of geography, organisms, and thematic fields. The geographic diversity of authors whose work appears in JHB has increased steadily since 1968, but the geographic coverage of the content of JHB articles remains strongly lopsided toward the (...) United States, United Kingdom, and western Europe and has diversified much less dramatically over time. The taxonomic diversity of organisms discussed in JHB increased steadily between 1968 and the late 1990s but declined in later years, mirroring broader patterns of diversification previously reported in the biomedical research literature. Finally, we used a combination of topic modeling and nonlinear dimensionality reduction techniques to develop a model of multi-article fields within JHB. We found evidence for directional changes in the representation of fields on multiple scales. The diversity of JHB with regard to the representation of thematic fields has increased overall, with most of that diversification occurring in recent years. Drawing on the dataset generated in the course of this analysis, as well as web services in the emerging digital history and philosophy of science ecosystem, we have developed an interactive web platform for exploring the content of JHB, and we provide a brief overview of the platform in this article. As a whole, the data and analyses presented here provide a starting-place for further critical reflection on the evolution of the history of biology over the past half-century. (shrink)

Consists of two papers, Jung's "Synchronicity: An Acausal Connecting Principle," and Pauli's "The Influence of Archetypal Ideas on the Scientific Theories of Kepler." The latter is of interest as an application of Jungian psychology. The idea of synchronicity in Jung's paper is defined as "the simultaneous occurrence of a certain psychic state with one or more external events which appear as meaningful parallels to the momentary subjective state," and as "acausal orderedness.". This principle is put forth as a necessary supplement (...) to the causality principle, to which it can in no way be reduced. The evidence for this view is drawn from fields as diverse as microphysics and astrology, and is supported by many references to the history of thought. Jung perhaps fails to be fully convincing, but he has succeeded in illuminating an important yet hitherto highly obscure field of inquiry.--D. R. (shrink)

The present study explores the Bianchi type I universe in the frame work of f theory of gravity by considering strange quark matter attached to string cloud and domain walls in the presence and absence of magnetism. Field equations are solved by choosing a constant curvature method. It is found that obtained cosmological models are relevant to the early era of evolution of the universe. The strange quark matter may be a source of string cloud and domain walls.

A common account sees the human genome sequencing project of the 1990s as a “natural outgrowth” of the deciphering of the double helical structure of DNA in the 1950s. The essay aims to complicate this neat narrative by putting the spotlight on the field of human chromosome research that flourished at the same time as molecular biology. It suggests that we need to consider both endeavors – the human cytogeneticists who collected samples and looked down the microscope and the (...) molecular biologists who probed the molecular mechanisms of gene function – to understand the rise of the human genome sequencing project and the current genomic practices. In particular, it proposes that what has often been described as the “molecularization” of cytogenetics could equally well be viewed as the turn of molecular biologists to human and medical genetics – a field long occupied by cytogeneticists. These considerations also have implications for the archives that are constructed for future historians and policy makers. (shrink)

Despite a large and multifaceted effort to understand the vast landscape of phenotypic data, their current form inhibits productive data analysis. The lack of a community-wide, consensus-based, human- and machine-interpretable language for describing phenotypes and their genomic and environmental contexts is perhaps the most pressing scientific bottleneck to integration across many key fields in biology, including genomics, systems biology, development, medicine, evolution, ecology, and systematics. Here we survey the current phenomics landscape, including data resources and handling, and the progress that (...) has been made to accurately capture relevant data descriptions for phenotypes. We present an example of the kind of integration across domains that computable phenotypes would enable, and we call upon the broader biology community, publishers, and relevant funding agencies to support efforts to surmount today's data barriers and facilitate analytical reproducibility. (shrink)

This article synthesizes the results of several interviews with argumentation scholars from across the American continents to address three questions regarding the connections in argumentation studies between North and South/Central America: “What motivated the study of argumentation in the Americas?” “What commonalities, if any, exist in argumentation studies across the Americas?” and “What should the future of argumentation studies in the Americas look like?” Using these interviews in combination with existing textual sources, the article also provides motivated suggestions for directions (...) for the future of the community in the field. (shrink)

Communication Theories for Everyday Life introduces readers to the complexities of theories in communication studies, mass communication, and public relations, emphasizing their connection to everyday life. Instead of utilizing a "theory-a-day" approach, this text cuts across content areas and clusters related theories, making them easier for readers to process and apply to real-life situations. Communication Theories for Everyday Life also addresses theories in emerging areas and growing fields, such as media research, organizational communication, and computer-mediated communication, while still featuring the (...) traditional theories that always have defined the field. Features: Contextualizes theory with an introductory chapter in each of the main content areas that introduces the theories and research in the field, showing students how the theories developed. Features new theories and subject areas not present in most traditional communication theory textbooks, including new interactive technologies, feminist scholarship, British cultural studies, semiotics, postmodernism, and critical race theory. Emphasizes the application of some theories across many subject areas through headings in the form of questions that encourage students to process material and explore for themselves how theories and content apply to their lives. Uses case-study chapters that demonstrate to students how each subject area would use theory to solve or understand issues in everyday life. Reviews theories for the three main genres of communication - communication studies, mass communication, and public relations - with balanced coverage, examining the unique contributions each area has made to the field of communication as a whole. Page 1 of 1. (shrink)

Existential analysis, according to Binswanger, is not a psychopathology, and is not necessarily therapeutic; it is not founded upon the medical standards of "sick" and "healthy." The eight writers in this volume illustrate that the suspension of such norms widens and deepens the field of philosophical anthropology, and hold that we may talk meaningfully about the "human condition." Taking "alienation" as an aspect of that condition, four of the authors explore some of its manifestations and its place in the (...) totality of experience. As a whole, the volume is bold and engaging, and balances scholarly rigor with adventurous speculation.--R. C. D. (shrink)

With his usual conciseness and lucidity, Körner attempts to show what philosophy is by looking at what it does, i.e., by investigating its problems, its branches and its history. Körner begins by setting out classic problems ranging from the problem of class-existence to the problem of freedom, and follows this by an investigation of various methodologies. After this introductory material the bulk of the book ranges over the central problems of most branches of philosophy and concludes with a brief sketch (...) of the history of philosophy. Of special note is Körner's treatment of metaphysics to which he gives an entire section of almost seventy pages. Those familiar with Körner's other work will find it a concise summary of his notion of metaphysics as exhibition and/or replacement-analysis of categorial frameworks. Also of note is his refreshing treatment of philosophy of mind. He sees the problem of intentionality as the chief consideration for that branch of philosophy. Although he makes mention of the linguistic approach to philosophy of mind his main thrust is to set the problems in Brentano's terms and show how the mind-body problem and theories of truth are handled from that framework. There are some drawbacks in the book. First: given the length of his treatment of metaphysics one could wish that somewhere Körner in his explication of metaphysics had given some recognition to the realistic alternatives to his transcendental metaphysics. Second: one must wonder to whom the book is addressed. The conciseness of Körner's style allows him to range over an unbelievably large area, but in such a pithy manner that it seems almost unimaginable that the educated layman will be able to follow the presentations and arguments, particularly those interspersed with logical notation. For example, how much value is there in condensing the logic of truth-functions, quantification and axiomatization into less than ten pages? For those in the field it is repetitive, for those not, it must be nearly unintelligible. One feels Körner really wanted to write a defense of metaphysics. This may have been a more efficacious project eliminating the need to write first for one audience then for another. The book is concise, lucid, and illuminating.--R. F. D. (shrink)

The author interprets those facets of major American thinkers which resemble, lead to, or complement the insights of Zen; and if a pedantic scholar might quarrel with some of his readings, his own intention and insights are refreshing and provocative. Beginning with Jefferson, and passing through Thoreau, James, Peirce, Santayana, Dewey, and others, he traces the Zen-like themes to their most complete expression in G. M. Mead. In - their regard for non-dualism, participation, responsibility, dynamism, openness, concern for the "everyday," (...) compassion, zest, and being-at-one with self, others, and nature, Ames finds that Zen and American thought meet, and suggests that their differences can be mutually fertilizing. This gentle book is a success in a field too often plagued by non-conformist and cultish postures. --R. C. D. (shrink)

Stem cell science is advancing at an unprecedented rate, with thousands of research papers being published every year and many clinical trials for a wide range of conditions underway as registered on ClinicalTrials.gov. This rapidly expanding and alluring field has brought with it ever more complex and multifaceted ethical issues, many of which require new guidelines, consent protocols and even change in legislation, since they do not fit comfortably in the existing bioethical regulations and protocols. Keeping up with the (...) ethical implications of stem cell research is daunting to the expert and non-expert. We review the various types of stem cells and then focus on multipotent and pluripotent cell types, since it is these cell types that bring with them the greatest research and therapeutic potential, while concurrently delivering novel ethical conundrums. Certain key considerations are currently lacking and what is needed is how to obtain permission from individuals who donate their biological material for both scientific inquiry and eventually, for their potential therapeutic utility. (shrink)

We have conducted an experimental study of V-type electromagnetically induced transparency in sodium. Its principles are elucidated by a simple model. Measurements show decreased fluorescence and absorption depending on the detuning of the driving and probe fields, which is in agreement with the results of numerical simulation.

Ed Freeman’s influential ideas on stakeholder theory, business ethics, humanities, and capitalism became foundational in the management field and turned around the mainstream thinking about business. Stakeholder theory developed by Freeman and others posits that business is not as much about profits, but rather about creating value for its stakeholders, including employees, customers, communities, financiers, and suppliers. The relationship between a company and its stakeholders is the essence of business and should be of utmost attention to its managers. Managers (...) should avoid resorting to trade-offs by prioritizing one stakeholder group (e.g., shareholders) over the others and strive to run their companies in the interests of all stakeholders. The idea of pursuing the interests of all stakeholders became revolutionary in management and went far beyond the management field, expanding to Law, Health Care, Education, Public Policy and Administration, and Environmental Policy. This book is a collection of Ed Freeman’s most influential and important works on stakeholder theory as well as business ethics, humanities, and capitalism. (shrink)

Perforation or gap formation in a vegetation is a major process in landscape transformation. The occurrence of gaps profoundly alters the microclimatical conditions in a vegetation. A method is proposed to quantify perforation by using the three main 2-D characteristics of the gaps: area, number and boundary length. New measures are developed by normalizing the observed values to the reference status of minimum and maximum perforation. As minimum perforation status, the presence of one single gap with area equal to the (...) map resolution is assumed. The new measures are combined using a 3-D Euclidean distance to visualize the process and to detect changes. The method is exemplified using a field case of gaps in a tropical terra firme rainforest at Tiputini, Ecuador. (shrink)

Psychophysical studies of change blindness indicate that, at any instant, human observers are aware of detail in few parts of the visual field. Such results suggest, to some theorists, that human vision reconstructs only a few portions of the visual scene and that, to bridge the resulting representational gaps, it often lets physical objects serve as their own short-term memory. We propose that human vision reconstructs no portion of the visual scene, and that it never lets physical objects serve (...) as their own short-term memory. (shrink)

The analysis of the Helmholtz equation is shown to lead to an exact Hamiltonian system describing in terms of ray trajectories, for a stationary refractive medium, a very wide family of wave-like phenomena (including diffraction and interference) going much beyond the limits of the geometrical optics (“eikonal”) approximation, which is contained as a simple limiting case. Due to the fact, moreover, that the time independent Schrödinger equation is itself a Helmholtz-like equation, the same mathematics holding for a classical optical beam (...) turns out to apply to a quantum particle beam moving in a stationary force field, and leads to a system of Hamiltonian equations providing exact and deterministic particle trajectories and dynamical laws, and containing the laws of Classical Mechanics in the eikonal limit. (shrink)

The problem of knowledge evolution has received considerable attention over the years. Mainly, the study of the dynamics of knowledge has been addressed in the area of Belief Revision, a field emerging as the convergence of the efforts in Philosophy, Logic, and more recently Computer Science, where research efforts usually involve “flat” knowledge bases where there is no additional information about the formulas stored in it. Even when this may be a good fit for particular applications, in many real-world (...) scenarios different information items may be attached to formulas. For instance, when the reliability of the source of the piece of information is attached to it as a measure of some quality (e.g., strength) of the piece of information itself, or when some characteristic informs us on the desirability of the item (e.g., the potential benefit that could be obtained from it). If this type of information is available, we can use it to guide how the belief base is to be modified when new information arrives. In this work, we present a novel approach to the contraction of knowledge bases where formulas have values attached that measure some quality linked to those formulas, exploiting it to define their desirability, and uses such desirability to define which formulas need to be removed to solve conflicts. In this context, we introduce a set of properties for contraction operators by extending classic approaches. We also show how the local treatment of minimal conflicts can induce some counter-intuitive contractions, and we present a way to avoid them by considering optimal resolutions of conflicts using the additional information encoded. We show how the proposed formalization captures any contraction that is optimal under a set of features. Finally, we present a refinement based on the identification of related minimal conflicts that performs contraction in optimal ways without looking into the entire knowledge base. The approach is based on the use of the accrual of beliefs where several formulas collaboratively use their respective values to prevail in the resolution of conflicts. (shrink)

In many simple integral domains, such as Z or Z[i], there is a straightforward procedure to determine if an element is prime by simply reducing to a direct check of finitely many potential divisors. Despite the fact that such a naive approach does not immediately translate to integral domains like Z[x] or the ring of integers in an algebraic number field, there still exist computational procedures that work to determine the prime elements in these cases. In contrast, we will (...) show how to computably extend Z in such a way that we can control the ordinary integer primes in any Π20 way, all while maintaining unique factorization. As a corollary, we establish the existence of a computable unique factorization domain such that the set of primes is Π20-complete in every computable presentation. (shrink)

Detection of deception and confirmation of truth telling with conventional polygraphy raised a host of technical and ethical issues. Recently, newer methods of recording electromagnetic signals from the brain show promise in permitting the detection of deception or truth telling. Some are even being promoted as more accurate than conventional polygraphy. While the new technologies raise issues of personal privacy, acceptable forensic application, and other social issues, the focus of this paper is the technical limitations of the developing technology. Those (...) limitations include the measurement validity of the new technologies, which remains largely unknown. Another set of questions pertains to the psychological paradigms used to model or constrain the target behavior. Finally, there is little standardization in the field, and the vulnerability of the techniques to countermeasures is unknown. Premature application of these technologies outside of research settings should be resisted, and the social conversation about the appropriate parameters of its civil, forensic, and security use should begin. (shrink)

Public health ethics, like the field of public health it addresses, traditionally has focused more on practice and particular cases than on theory, with the result that some concepts, methods, and boundaries remain largely undefined. This paper attempts to provide a rough conceptual map of the terrain of public health ethics. We begin by briefly defining public health and identifying general features of the field that are particularly relevant for a discussion of public health ethics.Public health is primarily (...) concerned with the health of the entire population, rather than the health of individuals. Its features include an emphasis on the promotion of health and the prevention of disease and disability; the collection and use of epidemiological data, population surveillance, and other forms of empirical quantitative assessment; a recognition of the multidimensional nature of the determinants of health; and a focus on the complex interactions of many factors—biological, behavioral, social, and environmental—in developing effective interventions. (shrink)