We report on an unpublished and previously unknown manuscript of John von Neumann and contextualize it within the development of the theory of shock waves and detonations during the nineteenth and twentieth centuries. Von Neumann studies bombs comprising a primary explosive charge along with explosive booster material. His goal is to calculate the minimal amount of booster needed to create a sustainable detonation, presumably because booster material is often more expensive and more volatile. In service of this goal, he formulates (...) and analyzes a partial differential equation-based model describing a moving shock wave at the interface of detonated and undetonated material. We provide a complete transcription of von Neumann’s work and give our own accompanying explanations and analyses, including the correction of two small errors in his calculations. Today, detonations are typically modeled using a combination of experimental results and numerical simulations particular to the shape and materials of the explosive, as the complex three dimensional dynamics of detonations are analytically intractable. Although von Neumann’s manuscript will not revolutionize our modern understanding of detonations, the document is a valuable historical record of the state of hydrodynamics research during and after World War II. (shrink)

Verzameling filosofische verhandelingen over tijd onder de titel Kairos = de juiste tijd of het juiste moment in het Grieks.

Isaac Newton's Scientific Method examines Newton's argument for universal gravity and his application of it to resolve the problem of deciding between geocentric and heliocentric world systems by measuring masses of the sun and planets. William L. Harper suggests that Newton's inferences from phenomena realize an ideal of empirical success that is richer than prediction. Any theory that can achieve this rich sort of empirical success must not only be able to predict the phenomena it purports to explain, but (...) also have those phenomena accurately measure the parameters which explain them. Harper explores the ways in which Newton's method aims to turn theoretical questions into ones which can be answered empirically, by measurement from phenomena, and to establish that propositions inferred from phenomena are provisionally accepted as guides to further research. This methodology, guided by its rich ideal of empirical success, supports a conception of scientific progress that does not require construing it as progress toward Laplace's ideal limit of a final theory of everything, and is not threatened by the classic argument against convergent realism. Newton's method endorses the radical theoretical transformation from his theory to Einstein's. Harper argues that it is strikingly realized in the development and application of testing frameworks for relativistic theories of gravity, and very much at work in cosmology today. (shrink)

Designing an integrative research program requires that research leaders negotiate a balance between the scientific interest of research and the practical interests of non-scientific partners. This paper examines the ways integrated research is formally categorised, and analyses the tangible expressions of the practical politics involved in reconciling scientific and practical interests. Drawing on a comparative study of two Australian Cooperative Research Centres, I argue that categories used by the research leaders to describe the research programs embody three different strategies for (...) structuring the relationships between researchers and their partners. These include matching research program categories to partners' implementation program categories, reproducing existing integrative partnership models, and filling gaps in understanding with new technical approaches. These strategies offer different advantages and disadvantages. The cases suggest that the integrative approach favoured by each Centre depended on issues such as the geographic scope of policy arenas, sources of scientific credibility, and the political risks facing partners. The practical politics of research organisation offers a new lens for understanding both the practice and theory of integrated research. (shrink)

We make decisions every day. Yet we are sometimes perplexed by these decisions and the decisions of others. To complicate things further, we live in an age where there are more things to choose from than ever before – the Internet is transforming our choices and making us more accountable for them: what we choose is recorded, modelled and used to predict our future behaviour. So are we in a position to make better choices today than we were a decade (...) ago? Certainly there are some who believe so. Psychologists claim we are subject to hidden mental processes that lead us to one thing rather than another; economists offer predictions about what people will buy; and some philosophers claim that our choices echo our evolutionary past. Are these claims merited? Do they reflect the beginnings of a new science of choice? This book offers a critical overview of these and other claims, showing where they are justified and where they are exaggerated. It will be an essential reference for anyone interested in whether science can help us to understand both the ways people make choices in their everyday lives and how these may be changing. (shrink)

El interés del artículo es doble: la poética de Hölderlin, particularmente su teoría de la tragedia, y una reflexión filosófica del autor, de corte kairológico, en un esfuerzo por apartarse de la filosofía de la historia. La concepción trágica del mundo es investigada en las versiones de Hölderlin sobre Hiperión y Empédocles; la dimensión histórica del trabajo poético es estudiada en sus traducciones del Edipo y la Antígona de Sófocles; la concepción trágica de la historia aparece en la interpretación del (...) poema Patmos. El autor centra su interés en la cuestión del tiempo, pero no en su generalidad conceptual, sino en su comprensión de acontecimiento como "tiempo justo". (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Philosophy, Psychiatry, & Psychology 11.1 (2004) 55-64 [Access article in PDF] Delusions and Discourse:Moving beyond the Constraints of the Modernist Paradigm David J. Harper This special issue provides a good opportunity to reflect on the range of views about delusions,1 and it is good to see all the authors taking the issue of how to approach this topic seriously. Here I wish to argue that the traditional psychiatric (...) view of delusions is problematic. In the first half of this article I will group my comments on the issues raised by the papers by Klee and Bayne and Pacherie together as I think that, for their differences, they share modernist philosophical assumptions. I will argue that the modernist paradigm runs into considerable problems in considering beliefs felt by some to be unusual and I will go on to argue that we need to move beyond this paradigm and embrace different approaches, of which the work by Georgaca is an exemplar. The Trouble with (traditional Views of) Delusions The traditional psychiatric view of delusion has come under increasing attack over recent years. As Georgaca has noted, a number of problems with the assumptions in definitions of delusion can be identified when they are viewed from a social constructionist perspective (Georgaca 2000, 2004; Harper 1992, 1996; Heise 1988). For convenience I will group these under four main headings. They Are Based on a Naively Realist View of the World The criterion of inaccuracy or falsity implies that deciding on the veracity of a belief is a relatively unproblematic matter. However, the reality of claims does not always seem so important in judgments about whether a belief is delusional or not. For example, there is little evidence that mental health professionals systematically investigate the basis for people's beliefs; rather, they decide whether a belief is plausible. Thus Maher has argued that the assessment of the plausibility of beliefs is "typically made by a clinician on the basis of "common sense," and not on the basis of a systematic evaluation of empirical data" (1992, 261). He notes that it is not "customary to present counterevidence to the patient; it is not even common to present vigorous counterargument" (1992, 261) and there appears to be some empirical evidence of this (McCabe et al. 2002). Here then, we begin to see [End Page 55] how psychiatry, while claiming to have the power to judge the truth of beliefs on the basis of its status as an empirical scientific discipline, can be seen to make judgments on the basis of common sense and taken-for-granted social and cultural assumptions.Some commentators have suggested that delusions should be identified less by whether they seem to accord with reality but more by whether a person gives evidence for their belief (Gillett 1995; Spitzer 1990). However, this seems to be based on an idealized view of how people manage their beliefs in everyday life. For example, I would question how many of us have evidence for many of the beliefs (e.g., political, ethical, religious, etc.) we hold dear; indeed it would be hard to think of what evidence we could have for some of them (e.g., religious and ethical beliefs). Some recent work has suggested that the diagnosis of delusion is made on the basis of how people with delusions talk and interact; for example, some have argued that they do not appear to appreciate the hearer's point of view (Palmer 2000). However, here and in previous work, Georgaca (2000, 2004) has shown that people with delusions are able to talk about and negotiate disagreements about their beliefs and that many disputes of fact cannot be settled in conversation. People Said to Have Delusions Are Seen to Vary in the Conviction With Which Those Beliefs Are Held There is evidence that people considered to be deluded vary in the conviction with which they hold beliefs (Garety 1985) and can also be persuaded to modify their beliefs if this is conducted in a sensitive and collaborative manner (e.g., Chadwick, Birchwood, and Trower 1996). This... (shrink)

The recent decrease in public confidence in the measles, mumps and rubella vaccine has important implications for individuals and public health. This article presents moral arguments relating to conflicts between individual autonomy and collective responsibilities in vaccination decisions with a view to informing and advising health professionals and improving the effectiveness of education policies in avoiding resurgence of endemic measles. Lower population immunity, due to falling uptake, is hastening the need for greater public awareness of the consequences for the population. (...) Vaccination refusals go hand in hand with responsibilities owed to future generations and society in not knowingly contributing to preventable harms. Issues such as parents’ rights are considered and balanced against: collective responsibilities for public health; permissibility of ‘free-riding’; conflicting duties of health professionals; and possible enforcement of vaccination. It is suggested that the arguments may form a persuasive tool for the practice of health professionals involved in informing and supporting parents’ vaccination decisions. (shrink)

"La filosofía en Puerto Rico: los transterrados reúne varios estudios sobre filófofos extranjeros que en algún momento decidieron compartir su vida, su enseñanza y sus trabajos académicos con los habitantes de esta bella y hospitalaria Isla de Puerto Rico. La presente es una obra en la cual han colaborado varios autores: Manfre Kerkhoff, Antonio Mansilla Triviño, Juan José Sánchez, Luis Ramírez, José Rivera y Carlos Rojas Osorio, quien estuvo a cargo la iniciativa, el plan de la obra y la (...) edición."--Cubierta. (shrink)

This paper depicts a case study of an organizational strategy for the promotion of ethical practice when introducing a new, high-risk, ethically-charged medical practice like Medical Assistance in Dying (MAiD). We describe the development of an interprofessional program that enables the delivery of high-quality, whole-person MAiD care that is values-based and sustainable. A “care ecology” strategy recognizes the interconnected web of relationships and structures necessary to support a quality experience of MAiD for patients, families, and clinicians. This program exemplifies a (...) care ecology approach that addresses common barriers to entry to MAiD practice, and also meets the needs of a variety of stakeholders through the creation of patient and family resources, team supports, standards of practice, professional development opportunities, organizational infrastructure, and community partnerships. We also describe how a thriving care ecology evolves to remain resilient, and to enable integration as the needs of the organization, team and program change over time. The design and development of this program may be adapted to other jurisdictions and organizations where MAiD is introduced, or where new patient populations become eligible for MAiD. This care ecology model may also be applicable to the creation of sustainable programs that provide other morally controversial or novel clinical services. (shrink)

The Akaike Information Criterion can be a valuable tool of scientific inference. This statistic, or any other statistical method for that matter, cannot, however, be the whole of scientific methodology. In this paper some of the limitations of Akaikean statistical methods are discussed. It is argued that the full import of empirical evidence is realized only by adopting a richer ideal of empirical success than predictive accuracy, and that the ability of a theory to turn phenomena into accurate, agreeing measurements (...) of causally relevant parameters contributes to the evidential support of the theory. This is illustrated by Newton's argument from orbital phenomena to the inverse-square law of gravitation. (shrink)

This essay extends Robin DiAngelo’s concept of white fragility in two directions. First, we outline an additional cause of white fragility. The lack of proper terminology available to discuss race-based situations creates a semantic false dichotomy, which often results in an inability to discuss issues of racism in a way that is likely to have positive consequences, either for interpersonal relationships or for social and political change. Second, we argue that white fragility, with its semantic foundations, has serious consequences for (...) racial justice. It perpetuates the mass incarceration of black Americans, and undergirds the knowledge gap and subsequent wealth gap. The result of these racial injustices, which are maintained partially through white fragility, is that black Americans do not live in a democracy; they neither occupy positions of social and political power, nor have the ability to obtain power or directly impact who does obtain power. (shrink)

In May of 1973 we organized an international research colloquium on foundations of probability, statistics, and statistical theories of science at the University of Western Ontario. During the past four decades there have been striking formal advances in our understanding of logic, semantics and algebraic structure in probabilistic and statistical theories. These advances, which include the development of the relations between semantics and metamathematics, between logics and algebras and the algebraic-geometrical foundations of statistical theories (especially in the sciences), have led (...) to striking new insights into the formal and conceptual structure of probability and statistical theory and their scientific applications in the form of scientific theory. The foundations of statistics are in a state of profound conflict. Fisher's objections to some aspects of Neyman-Pearson statistics have long been well known. More recently the emergence of Baysian statistics as a radical alternative to standard views has made the conflict especially acute. In recent years the response of many practising statisticians to the conflict has been an eclectic approach to statistical inference. Many good statisticians have developed a kind of wisdom which enables them to know which problems are most appropriately handled by each of the methods available. The search for principles which would explain why each of the methods works where it does and fails where it does offers a fruitful approach to the controversy over foundations. (shrink)

The Akaike Information Criterion can be a valuable tool of scientific inference. This statistic, or any other statistical method for that matter, cannot, however, be the whole of scientific methodology. In this paper some of the limitations of Akaikean statistical methods are discussed. It is argued that the full import of empirical evidence is realized only by adopting a richer ideal of empirical success than predictive accuracy, and that the ability of a theory to turn phenomena into accurate, agreeing measurements (...) of causally relevant parameters contributes to the evidential support of the theory. This is illustrated by Newton's argument from orbital phenomena to the inverse-square law of gravitation. (shrink)

Isaac Newton's Scientific Method examines Newton's argument for universal gravity and his application of it to resolve the problem of deciding between geocentric and heliocentric world systems by measuring masses of the sun and planets. William L. Harper suggests that Newton's inferences from phenomena realize an ideal of empirical success that is richer than prediction. Any theory that can achieve this rich sort of empirical success must not only be able to predict the phenomena it purports to explain, but (...) also have those phenomena accurately measure the parameters which explain them. Harper explores the ways in which Newton's method aims to turn theoretical questions into ones which can be answered empirically by measurement from phenomena, and to establish that propositions inferred from phenomena are provisionally accepted as guides to further research. This methodology, guided by its rich ideal of empirical success, supports a conception of scientific progress that does not require construing it as progress toward Laplace's ideal limit of a final theory of everything, and is not threatened by the classic argument against convergent realism. Newton's method endorses the radical theoretical transformation from his theory to Einstein's. Harper argues that it is strikingly realized in the development and application of testing frameworks for relativistic theories of gravity, and very much at work in cosmology today. (shrink)

The papers collected here are, with three exceptions, those presented at a conference on probability and causation held at the University of California at Irvine on July 15-19, 1985. The exceptions are that David Freedman and Abner Shimony were not able to contribute the papers that they presented to this volume, and that Clark Glymour who was not able to attend the conference did contribute a paper. We would like to thank the National Science Foundation and the School of Humanities (...) of the University of California at Irvine for generous support. WILLIAM HARPER University of Western Ontario BRIAN SKYRMS University of California at Irvine VII INTRODUCTION TO CAUSATION, CHANCE, AND CREDENCE The search for causes is so central to science that it has sometimes been taken as the defining attribute of the scientific enterprise. Yet even after twenty-five centuries of philosophical analysis the meaning of "cause" is still a matter of controversy, among scientists as well as philosophers. Part of the problem is that the servicable concepts of causation built out of Necessity, Sufficiency, Locality, and Temporal Precedence were constructed for a deterministic world-view which has been obsolete since the advent of quantum theory. A physically credible theory of causation must be, at basis, statistical. And statistical analyses of caus­ ation may be of interest even when an underlying deterministic theory is assumed, as in classical statistical mechanics. (shrink)

Over de filosofie van Nietzsche in het kader van drie decennia Nietzsche studies in Puerto Rico.

Gadamer, en Verdad y Método, alude a una llamada "nueva lógica", a propósito del concepto de la ocasionalidad de la obra de arte, desde el punto de vista hermenéutico. El autor se aprovecha de dicho concepto para rastrear en la obra de Lipps el pensamiento de la ocasionalidad y la lógica hermenéutica que le hace justicia, logrando con ello la rehabilitación de un filósofo de interés para el pensamiento kairológico que actualmente representa el autor.

El tema del artículo es la teoría de la tarea del crítico, según un ensayo de W. Benjamin, titulado Dos poemas de Holderlin (1915). Los temas centrales son una fundamentación metafísica de la producción poética y su reproducción crítica. Esta segunda tarea siempre será para el lector crítico un experimento. El autor reconstruye la compleja teoría del cálculo poetológico de W. Benjamin, y pone como ejemplo de la tarea crítica dos versiones de un poema de Hölderlin sobre el tema "la (...) muerte del poeta". (shrink)

In the nearshore waters of Alaska's remote and pristine Aleutian Islands is an astoundingly diverse and beautiful undersea world that is captured here for the first time, through color photographs taken by research divers. The photographs in this book convey the awe-inspiring experience of the divers as they encountered the spectacular beauty of the underwater Aleutians ecosystems. Together with an accompanying text that provides natural history information and an overview of the geography, geology, and oceanography of the 1,200-mile archipelago, the (...) images are a powerful vehicle for science education, making apparent the need to preserve the region's natural splendor. (shrink)