An equation proposed by Levy, Perdew and Sahni (Phys. Rev. A 30:2745, 1984) is an orbital-free formulation of density functional theory. However, this equation describes a bosonic system. Here, we analyze on a very fundamental level, how this equation could be extended to yield a formulation for a general fermionic distribution of charge and spin. This analysis starts at the level of single electrons and with the question, how spin actually comes into a charge distribution in a non-relativistic model. To (...) this end we present a space-time model of extended electrons, which is formulated in terms of geometric algebra. Wave properties of the electron are referred to mass density oscillations. We provide a comprehensive and non-statistical interpretation of wavefunctions, referring them to mass density components and internal field components. It is shown that these wavefunctions comply with the Schrödinger equation, for the free electron as well as for the electron in electrostatic and vector potentials. Spin-properties of the electron are referred to intrinsic field components and it is established that a measurement of spin in an external field yields exactly two possible results. However, it is also established that the spin of free electrons is isotropic, and that spin-dynamics of single electrons can be described by a modified Landau-Lifshitz equation. The model agrees with the results of standard theory concerning the hydrogen atom. Finally, we analyze many-electron systems and derive a set of coupled equations suitable to characterize the system without any reference to single electron states. The model is expected to have the greatest impact in condensed matter theory, where it allows to describe an N-electron system by a many-electron wavefunction Ψ of four, instead of 3N variables. The many-body aspect of a system is in this case encoded in a bivector potential. (shrink)

Durch Zusammenstellung meiner Erfahrungen mochte ich ver­ suchen, an dem Prozef.\ einer erhohten Verantwortung differentiell mitzuwirken. Das Buch erscheint zum 10jiihrigen Jubiliium der Griin­ dung der Gesellschaft flir Verantwortung in der Wissenschaft (GVW) und nimmt die Erfahrungen dieser 10 Jahre mit auf. Der Mensch scheint zu Extremen zu neigen. Neben den im Prolog angedeuteten Gefahren wird unsere Gesellschaft yom Wege sinnge­ miif.\en Handelns heute auch von der entgegengesetzten Gefahr be­ droht: Aus Unkenntnis und Furcht vor der Undurchschaubarkeit der Naturwissenschaft und (...) Technik beide zu verbannen und das Heil wieder im emotionalen Denken zu suchen. Es erscheint mir daher notwendig, die Probleme auf breiterer Basis zu durchleuchten. 1m ersten Kapitel wird versucht, das Selbstverstiindnis der Wissen­ schaft zu diskutieren. Details mogen einige Leser etwas langweilen. Es wird daher am Ende jedes Kapitels eine Zusammenfassung ge­ geben, die erlauben sollte, jedes weitere Kapitel auch nach tiberschla­ gen eines Kapitels volliesen zu konnen. 1m zweiten Kapitel werden Motivierungen fUr das Studium und fUr die wissenschaftliche Arbeit zusammengestellt. Eine Meinungsum­ frage u~ter 8000 amerikanischen Studenten hat ergeben, daf.\ ca. 80% studieren, urn einen Sinn ihres Lebens zu finden. Diese Umfrage zeigt die Dringlichkeit der im zweiten Kapitel versuchten Diskussion. (shrink)

The Cnidaria represent the most ancient eumetazoan phylum. Members of this group possess typical animal cells and tissues such as sensory cells, nerve cells, muscle cells and epithelia. Due to their unique phylogenetic position, cnidarians have traditionally been used as a reference group in various comparative studies. We propose the colonial marine hydroid, Hydractinia, as a convenient, versatile platform for basic and applied research in developmental biology, reproduction, immunology, environmental studies and more. In addition to being a typical cnidarian representative, (...) Hydractinia offers many practical and theoretical advantages: studies that are feasible in Hydra like regeneration, pattern regulation, and cell renewal from stem cells, can be supplemented by genetic analyses and classical embryology in Hydractinia. Metamorphosis of the planula larva of Hydractinia can be used as a model for cell activation and communication and the presence of a genetically controlled allorecognition system makes it a suitable model for comparative immunology. Most importantly, Hydractinia may be manipulated at most aspects of its (short) life cycle. It has already been the subject of many studies in various disciplines, some of which are discussed in this essay. BioEssays 23:963–971, 2001. © 2001 John Wiley & Sons, Inc. (shrink)

The psalmist is deeply convinced that God is a reliable addressee to whom those hurt, traumatised and grieving may turn. Churches, by their mandate to share God's loving-kindness, are obliged to provide opportunities, counselling and pastoral care to those who suffer from violations in their lives. Representatives of the church will do so by proclaiming God's compassion and pitifulness. This obligation is all the more important as it can be observed that Christians, congregations and churches have oftentimes been part and (...) parcel of processes that caused harm, hurt and trauma to their members or other people. (shrink)

The development of genomic technologies has seemed almost magical. Excitement about it, both in medicine and among the public, stems from the belief that genomic techniques will illuminate the causes of health and disease, will lead to effective interventions for both rare and common genetic conditions, and will inform reproductive decision‐making. Novel diagnostic tools, however, are often deployed before targeted therapies are developed, tested, or available and before their psychosocial implications are explored. Newer technologies such as prenatal whole exome screening (...) are seen as offering “decisional autonomy” to expectant parents, although such technologies identify information about genetic sequencing that may not have clear meaning. The “therapeutic gap” between the ability to conduct genetic sequencing and the ability to fully understand what the test results mean, much less what treatments to offer, leaves families with complex and unclear information they cannot act upon with confidence during pregnancy. In this essay, we will consider the psychosocial and ethical implications of such assumptions—and of the uncertain information produced by these technologies—for individuals and families and for societal aspects such as medical service usage and demographic inequities. (shrink)

This study examines the public's and physicians' willingness to support deception of insurance companies in order to obtain necessary healthcare services and how this support varies based on perceptions of physicians' time pressures. Based on surveys of 700 prospective jurors and 1617 physicians, the public was more than twice as likely as physicians to sanction deception (26% versus 11%) and half as likely to believe that physicians have adequate time to appeal coverage decisions (22% versus 59%). The odds of public (...) support for deception compared to that of physicians rose from 2.48 to 4.64 after controlling for differences in time perception. These findings highlight the ethical challenge facing physicians and patients in balancing patient advocacy with honesty in the setting of limited societal resources. (shrink)

This paper aims to implement Bell’s notion of local causality into a framework, called local physical theory, which is general enough to integrate both probabilistic and spatiotemporal concepts and also classical and quantum theories. Bell’s original idea of local causality will then arise as the classical case of our definition. First, we investigate what is needed for a local physical theory to be locally causal. Then we compare local causality with Reichenbach’s common cause principle and relate both to the Bell (...) inequalities. We find a nice parallelism: both local causality and the common cause principle are more general notions than captured by the Bell inequalities. Namely, Bell inequalities cannot be derived neither from local causality nor from a common cause unless the local physical theory is classical or the common cause is commuting, respectively. (shrink)

Financial economics, and the calculations of time and uncertainty derived from it, are playing an increasingly important role in non-finance areas, such as monetary and environmental economics. In this 2001 book, Professors Le Roy and Werner supply a rigorous yet accessible graduate-level introduction to this subfield of microeconomic theory and general equilibrium theory. Since students often find the link between financial economics and equilibrium theory hard to grasp, they devote less attention to purely financial topics such as calculation of (...) derivatives, while aiming to make the connection explicit and clear in each stage of the exposition. Emphasis is placed on detailed study of two-date models, because almost all of the key ideas in financial economics can be developed in the two-date setting. In addition to rigorous analysis, substantial sections of discussion and examples are included to make the ideas readily understandable. (shrink)

We use the U.S. Supreme Court’s decision in Citizens United v. Federal Election Commission to assess the reputational risks created by political investment opportunities that allow managers to spend unlimited and potentially undisclosed firm resources on independent political expenditures. This new opportunity raises important ethical questions, as it is difficult, and perhaps impossible, under current law for shareholders to hold managers accountable for this investment choice and the reputational risks it entails. Using firms’ known political activity as a proxy for (...) managers’ likely future use of independent political expenditures, we examine how market participants reacted to Citizens United, conditional on this prior activity and corporate governance attributes related to the concentration of decision rights in senior management and blockholders. The results of our analyses document that firms with both a high level of known political activity and CEO-chairperson of the board duality experienced negative abnormal returns in reaction to Citizens United. In contrast, firms with concentrated ownership experienced positive abnormal returns; however, as known political activity increased, investors discounted the benefits of concentrated ownership. These findings suggest that investors expect this expansion of firms’ political investment opportunities to amplify principal-agent problems inherent in corporate political activity. Additionally, our findings provide evidence for those deliberating the mandatory disclosure of firms’ investments in politics as a means of increasing managerial accountability to both shareholders and the public. (shrink)

We consider the time delay of massive, non-relativistic, one-dimensional particles due to a tunneling potential. In this setting the well-known Hartman effect asserts that often the sub-ensemble of particles going through the tunnel seems to cross the tunnel region instantaneously. An obstacle to the utilization of this effect for getting faster signals is the exponential damping by the tunnel, so there seems to be a trade-off between speedup and intensity. In this paper we prove that this trade-off is never in (...) favor of faster signals: the probability for a signal to reach its destination before some deadline is always reduced by the tunnel, for arbitrary incoming states, arbitrary positive and compactly supported tunnel potentials, and arbitrary detectors. More specifically, we show this for several different ways to define “the same incoming state” and “the same detector” when comparing the settings with and without tunnel potential. The arrival time measurements are expressed in the time-covariant approach, but we also allow the detection to be a localization measurement at a later time. (shrink)

COVID-19 did not disappear in the third year (2022) of the global pandemic. On the contrary, the number of infected people several times exceeded the highs of previous years, but the greater morbidity was not accompanied by a relatively comparable number of deaths. Some studies showed that the SARS-CoV-2 virus impact, e.g. in CEE EU countries, characterizes the seasonal intensity as temperatures fall or rise in relative humidity. All researchers agree that the number of COVID-19-infected people is only an estimate (...) based on the volume of tests performed and that the true numbers are usually much higher. The implementation of spatial interaction modeling could potentially aid in the control of the COVID-19 pandemic due to the inherently spatial nature of its diffusion. The gravity models used in this investigation to simulate the regional spread of the COVID-19 epidemic are based methodologically on previous empirical studies. The proposed methodology uses techniques for modeling spatial interactions due to the epidemics described above, which are a direct result of the number of contacts between individuals. The COVID-19 pandemic can be studied regionally using spatial diffusion methods as well as population potential models (spatial interaction models) and visualized using geographic information system software. Empirical verification and geovisualizations are based on available recent population and pandemic statistics that are possible to acquire from national health services. Methodologically, this type of modeling and simulation aimed at reconstructing a factual situation can be defined as abductive chorological inferring. (shrink)

Peer review is a widely accepted instrument for raising the quality of science. Peer review limits the enormous unstructured influx of information and the sheer amount of dubious data, which in its absence would plunge science into chaos. In particular, peer review offers the benefit of eliminating papers that suffer from poor craftsmanship or methodological shortcomings, especially in the experimental sciences. However, we believe that peer review is not always appropriate for the evaluation of controversial hypothetical science. We argue that (...) the process of peer review can be prone to bias towards ideas that affirm the prior convictions of reviewers and against innovation and radical new ideas. Innovative hypotheses are thus highly vulnerable to being “filtered out” or made to accord with conventional wisdom by the peer review process. Consequently, having introduced peer review, the Elsevier journal Medical Hypotheses may be unable to continue its tradition as a radical journal allowing discussion of improbable or unconventional ideas. Hence we conclude by asking the publisher to consider re-introducing the system of editorial review to Medical Hypotheses. (shrink)

It is shown that, given any finite set of pairs of random events in a Boolean algebra which are correlated with respect to a fixed probability measure on the algebra, the algebra can be extended in such a way that the extension contains events that can be regarded as common causes of the correlations in the sense of Reichenbach's definition of common cause. It is shown, further, that, given any quantum probability space and any set of commuting events in it (...) which are correlated with respect to a fixed quantum state, the quantum probability space can be extended in such a way that the extension contains common causes of all the selected correlations, where common cause is again taken in the sense of Reichenbach's definition. It is argued that these results very strongly restrict the possible ways of disproving Reichenbach's Common Cause Principle. (shrink)

In a recent paper, Cabbolet argues that the PBR theorem is nonreal since in the ensemble interpretation of quantum mechanics the entangled measurement used in the derivation of the PBR theorem is nonexisting. However, Cabbolet (1) does not provide any argument for the nonexistence of entangled measurements beyond the incompatibility of the existence of entangled measurements and the existence of $$\psi$$ -epistemic models which we already know from the PBR theorem; and (2) he does not show why it is more (...) reasonable to abandon entangled measurements instead of $$\psi$$ -epistemic models. Hence, the PBR theorem remains intact. (shrink)

Neoliberalism has come to be understood not only as an economic system, but as a mode of existence that understands the self as primarily the bearer of human capital. This paper contrasts the neoliberal ideal of selfhood with Kierkegaard’s notion of the self as developed in The Sickness unto Death. Using Kierkegaard’s typology of despair as an analytical framework, I argue that the neoliberal subject displays an impoverished grasp of the various elements that, for Kierkegaard, are constitutive of the self, (...) and shows serious deficiencies in its understanding of what it means to live a meaningful life. (shrink)

This Festschrift in honour of Werner G. Jeanrond, currently Master of St Benet's Hall, University of Oxford, UK, investigates the challenge of alterity for Christianity, exploring and elaborating on this core concern in Jeanrond's hermeneutical theology. Blurring disciplinary boundaries, more than thirty of Jeanrond's colleagues and companions from ten countries track the dynamics of difference driven by the encounter with the self as other, the other as other, and God as the radical other. Who is my other? What do (...) I encounter when I encounter my other? And what responses and responsibilities does the encounter with my other evoke? Grappling with questions like these, the contributions to this compilation analyse alterity in the Bible, alterity in philosophy, alterity in theology, alterity in interreligious dialogues, and the radical alterity of God. Tying in with Jeanrond's explorations of the many faces and facets of the other, this Festschrift ultimately aims to advocate openness to the other as a necessity for both religion and reflections on religion. (shrink)

A partition $\{C_i\}_{i\in I}$ of a Boolean algebra Ω in a probability measure space (Ω, p) is called a Reichenbachian common cause system for the correlation between a pair A,B of events in Ω if any two elements in the partition behave like a Reichenbachian common cause and its complement; the cardinality of the index set I is called the size of the common cause system. It is shown that given any non-strict correlation in (Ω, p), and given any finite (...) natural number n > 2, the probability space (Ω,p) can be embedded into a larger probability space in such a manner that the larger space contains a Reichenbachian common cause system of size n for the correlation. (shrink)

Reality is hierarchically structured, or so proponents of the metaphysical posit of grounding argue. The less fundamental facts obtain in virtue of, or are grounded in, the more fundamental facts. But what exactly is it for one fact to be more fundamental than another? The aim of this paper is to provide a measure of relative fundamentality. I develop and defend an account of the metaphysical hierarchy that assigns to each fact a set of ordinals representing the levels on which (...) it occurs. The account allows one to compare any two facts with respect to their fundamentality and it uses immediate grounding as its sole primitive. In the first section, I will set the stage and point to some shortcomings of a rival account proposed by Karen Bennett. The second section will present my own proposal and the third section will discuss how it can be extended to non-foundationalist settings. The fourth section discusses potential objections. (shrink)

This book collects research papers on the philosophical foundations of probability, causality, spacetime and quantum theory. The papers are related to talks presented in six subsequent workshops organized by The Budapest-Kraków Research Group on Probability, Causality and Determinism. Coverage consists of three parts. Part I focuses on the notion of probability from a general philosophical and formal epistemological perspective. Part II applies probabilistic considerations to address causal questions in the foundations of quantum mechanics. Part III investigates the question of indeterminism (...) in spacetime theories. It also explores some related questions, such as decidability and observation. The contributing authors are all philosophers of science with a strong background in mathematics or physics. They believe that paying attention to the finer formal details often helps avoiding pitfalls that exacerbate the philosophical problems that are in the center of focus of contemporary research. The papers presented here help make explicit the mathematical-structural assumptions that underlie key philosophical argumentations. This formally rigorous and conceptually precise approach will appeal to researchers and philosophers as well as mathematicians and statisticians. (shrink)

The aim of this paper is to give a sharp definition of Bell's notion of local causality. To this end, first we unfold a framework, called local physical theory, integrating probabilistic and spatiotemporal concepts. Formulating local causality within this framework and classifying local physical theories by whether they obey local primitive causality---a property rendering the dynamics of the theory causal, we then investigate what is needed for a local physical theory, with or without local primitive causality, to be locally causal. (...) Finally, comparing Bell's local causality with the Common Cause Principles and relating both to the Bell inequalities we find a nice parallelism: Bell inequalities cannot be derived neither from local causality nor from a common cause unless the local physical theory is classical or the common cause is commuting, respectively. (shrink)

It is widely acknowledged that some truths or facts don’t have a minimal full ground [see e.g. Fine ]. Every full ground of them contains a smaller full ground. In this paper I’ll propose a minimality constraint on immediate grounding and I’ll show that it doesn’t fall prey to the arguments that tell against an unqualified minimality constraint. Furthermore, the assumption that all cases of grounding can be understood in terms of immediate grounding will be defended. This assumption guarantees that (...) the proposed minimality constraint is significant for all cases of grounding. With its help one can get a clear grip on the relevance of grounding, a feature that will be put to use in the penultimate section. (shrink)

Re-Engineering Philosophy for Limited Beings is about new approaches to many of the big topics in philosophy of science today, but with a very different take. To begin with, we are urged to reject the received Cartesian-Laplacean myths: Descartes’ certainty and Laplace’s computational omniscience. Instead, Wimsatt re-engineers a philosophy for human beings with all their cognitive limitations. His approaches find their starting point in the actual practices of scientists themselves, which he strongly identifies with engineering practices as the source of (...) researchers’ solutions for dealing with a complex world. He aims to construct an understanding of scientific methodology around the central role of reduction. But he dismisses eliminative reductionism in favor of a heuristic-based realist view. Wimsatt’s world is a complex one, and this means that science needs to do away with all the absolute and simple answers, because they do not reflect the world we are living in. A complex world requires the mindset and tinkering of an engineer to uncover its reality. The appropriate response must be heuristics all the way down as we constantly seek out reliable inferences on often shifting ground. To this end, we aim for models and theories that are robust, just as engineers aim to build robust machines. And although errors occur and approaches are fallible, they allow us to continually adapt the heuristics applied and sharpen our perceptions so as to develop more refined tools for investigating and understanding the world. (shrink)

All of metaethical positions today can be replaced by a universal architecture of moral philosophy, all but one: moral realism. Here, I use the term “metaethics” to refer to any theory of ethics concerning the groundwork of ethics, on the one hand, and the inquiry of the use of philosophical words, concepts or methods on the other. In this article, I will present my hypothesis that in moral philosophy, we do not need any specialized metaethics at all. Metaethics as a (...) discipline of philosophy is only required by the work of moral realists, who try to show us a realm of values and norms that exist (per se) naturally, non-naturally or supernaturally. How can they know? The effort of metaethical realists cannot be proven either in ontology or in the philosophy of language or in cognitive science or in any meta-science that works en plus to ethics, because even in every additional discipline, we have to accept the presupposition of a validity of judgments. So, let us try it the other way around; we have to find a way to found ethics by following its structures, and that means, based on David Velleman’s concepts: a) We have to search for a ubiquitous point of ethical theory in its foundation – here, no kind of value or norm can be found that is not based on a universal formal structure of normativity. b) We have to start an empirical inquiry to collect norms and values in actual use. MFT, moral psychology and moral sociology are in charge here. The combination of such an abstract groundwork with mere empirical study has to be legitimized again. Hence, I am going to try to sum up the main ideas of such a project to show the relevance of a new architecture of moral philosophy today. There is a line of reasoning that addresses the possibility of a transcendental critique in practical philosophy; therefore, it has to look into the different notions of “intuition” in moral methods like it was used by Sidgwick (Rashdall, Green, Ross, Brentano, McTaggart) and Moore on the one hand and Brentano and Bergson on the other. In my view, there is a way to combine these perspectives using the two-level-model of Hare, Singer, Greene, where “intuition” is used to categorize habits and customs of the common sense morality in general while a critical reflection uses act-utilitarian calculus to provide a universal decision – in the sense of “concrete reason” – for any possible actor in a singular situation (Hegel, Peirce, Bloch etc.). The change between these levels may be explained by means of a pragmatistic kind of continuum of research with an ideal summum bonum in the long run and a concept of common sense morality as can be found in every group or society. (shrink)

The common cause principle says that every correlation is either due to a direct causal effect linking the correlated entities or is brought about by a third factor, a so-called common cause. The principle is of central importance in the philosophy of science, especially in causal explanation, causal modeling and in the foundations of quantum physics. Written for philosophers of science, physicists and statisticians, this book contributes to the debate over the validity of the common cause principle, by proving results (...) that bring to the surface the nature of explanation by common causes. It provides a technical and mathematically rigorous examination of the notion of common cause, providing an analysis not only in terms of classical probability measure spaces, which is typical in the available literature, but in quantum probability theory as well. The authors provide numerous open problems to further the debate and encourage future research in this field. (shrink)