In Science of the Soul in Ibn Sina's Pointers and Reminders, Michael A. Rapoport provides a philological and interpretive guide for critically reading and interpreting Ibn Sina's (Avicenna, d. 1037) most challenging and influential text. Rapoport argues that chapters VII-X of the Pointers present scientific explanations for phenomena related to the human soul - from intellection to divination, magic, and marvels - within the framework of Ibn Sina's Metaphysics of the Rational Soul. This book dispels widespread notions that (...) the Pointers represents Ibn Sina's mystical or Sufi philosophy and therefore stands apart from the rest of his corpus. (shrink)

Nazariyat, Journal for the History of Islamic Philosophy and Sciences, issued twice a year in English and Turkish (Nazariyat İslam Felsefe ve Bilim Tarihi Araştırmaları Dergisi), is a refereed international journal. It publishes original studies, critical editions of classical texts and book reviews on Islamic philosophy, kalām, theoretical aspects of Sufism and the history of sciences. The goal of Nazariyat is to contribute to the discovery, examination and reinterpretation of the theoretical traditions in the history of Islamic thought, by giving (...) special attention to the post-classical period of it. **ISSN: 2148-8088 E-ISBN: 2547-9415**. (shrink)

We study the performance of heuristics relative to the performance of optimal solutions in the rich domain of sequential search, where the decision to stop the search depends only on the applicant’s relative rank. Considering multiple variants of the secretary problem, that vary from one another in their formulation and method of solution, we find that descriptive heuristics perform well only when the optimal solution prescribes a single threshold value. We show that a computational heuristic originally proposed as an approximate (...) solution to a single variant of the secretary problem performs equally well in many other variants where the optimal solution prescribes multiple threshold values that gradually relax the criterion for stopping the search. Finally, we propose a new heuristic with near optimal performance in a competitive or strategic variant of the secretary problem with multiple employers competing with one another to hire job applicants. Both heuristics share a simple computational component: the ratio of the number of interviewed applicants to the number of those remaining to be searched. We present the subgame-perfect Nash equilibrium for this competitive variant and an algorithm for its computation. (shrink)

Within the last decade, there has been a dramatic bloom in ridesharing businesses along with the emergence of new enabling technologies. A central issue in ridesharing, which is also important in the general domain of cost-sharing in economics and computer science, is that the sharing of cost implies positive externalities and hence coordination problems for the network users. We investigate these problems experimentally in the present study. In particular, we focus on how sequential observability of transportation mode choices can be (...) a powerful facilitator of coordination in ridesharing. Our study abstracts the essential issues of coordination in ridesharing into a directed network game with experimentally testable predictions. In line with the theoretical analysis, our experimental evidence shows that even a limited extent of sequential choice observability might lead to efficient coordination. However, convergence to efficiency is slower with more limited observability, resulting in a significant increase in travel cost. (shrink)

It remains to summarize the contributions which each of the three disciplines discussed here is making toward the development of a science of man. "Significs" makes a study of the effects on human behavior of the linguistic aspects of the evaluative process, the most distinctly human aspect of the behavior of the human organism. "Mathematical Biophysics" seeks to describe the events associated with evaluative processes in physico-mathematical terms. "Cybernetics" is discovering important invariants common to these processes and others, particularly those (...) observed in man-made machines and in situations which lend themselves to description in thermo-dynamic or statistical terms. (shrink)

We consider a class of dynamic tournaments in which two contestants are faced with a choice between two courses of action. The first is a riskless option (“hold”) of maintaining the resources the contestant already has accumulated in her turn and ceding the initiative to her rival. The second is the bolder option (“roll”) of taking the initiative of accumulating additional resources, and thereby moving ahead of her rival, while at the same time sustaining a risk of temporary setback. We (...) study this tournament in the context of a jeopardy race game (JRG), extend the JRG to $N > 2$ contestants, and construct its equilibrium solution. Compared to the equilibrium solution, the results of three experiments reveal a dysfunctional bias in favor of the riskless option. This bias is substantially mitigated when the contestants are required to commit in advance how long to pursue the risky course of action. (shrink)

The Braess Paradox (BP) is a counterintuitive finding that degrading a network that is susceptible to congestion may decrease the equilibrium travel cost for each of its users. We illustrate this paradox with two networks: a basic network with four alternative routes from a single origin to a single destination, and an augmented network with six alternative routes. We construct the equilibrium solutions to these two networks, which jointly give rise to the paradox, and subject them to experimental testing. Our (...) purpose is to test the generality of the BP when the network is enriched as well as the effects of the information provided to the network users when they conclude their travel. To this end, we compare experimentally two information conditions when each of the two networks is iterated in time. Under public monitoring each user is accurately informed of the route choices and payoffs of all the users, whereas under private monitoring she is only informed of her own payoff. Under both information conditions, over iterations of the basic and augmented games, aggregate route choices converge to equilibrium. (shrink)

We present the unification of Riemann–Cartan–Weyl (RCW) space-time geometries and random generalized Brownian motions. These are metric compatible connections (albeit the metric can be trivially euclidean) which have a propagating trace-torsion 1-form, whose metric conjugate describes the average motion interaction term. Thus, the universality of torsion fields is proved through the universality of Brownian motions. We extend this approach to give a random symplectic theory on phase-space. We present as a case study of this approach, the invariant Navier–Stokes equations for (...) viscous fluids, and the kinematic dynamo equation of magnetohydrodynamics. We give analytical random representations for these equations. We discuss briefly the relation between them and the Reynolds approach to turbulence. We discuss the role of the Cartan classical development method and the random extension of it as the method to generate these generalized Brownian motions, as well as the key to construct finite-dimensional almost everywhere smooth approximations of the random representations of these equations, the random symplectic theory, and the random Poincaré–Cartan invariants associated to it. We discuss the role of autoparallels of the RCW connections as providing polygonal smooth almost everywhere realizations of the random representations. (shrink)

The appearance of nuclear weapons suddenly made the extinction of humanity a distinct possibility. In view of this obverse side of scientific progress, attitudes toward science in the general population became ambivalent, at times bordering on hostility. It is argued that to a great extent the scientists themselves are responsible for the tarnished image of science. Accordingly they should restore science to its role of furthering human welfare and, above all, as a source of enlightenment. In our age enlightenment entails (...) emancipating humanity from superstitions generated by the cooptation of science in the service of power. (shrink)

We review the relation between spacetime geometries with trace-torsion fields, the so-called Riemann–Cartan–Weyl (RCW) geometries, and their associated Brownian motions. In this setting, the drift vector field is the metric conjugate of the trace-torsion one-form, and the laplacian defined by the RCW connection is the differential generator of the Brownian motions. We extend this to the state-space of non-relativistic quantum mechanics and discuss the relation between a non-canonical quantum RCW geometry in state-space associated with the gradient of the quantum-mechanical expectation (...) value of a self-adjoint operator given by the generalized laplacian operator defined by a RCW geometry. We discuss the reduction of the wave function in terms of a RCW quantum geometry in state-space. We characterize the Schroedinger equation in terms of the RCW geometries and Brownian motions. Thus, in this work, the Schroedinger field is a torsion generating field, both for the linear and non-linear cases. We discuss the problem of the many times variables and the relation with dissipative processes, and the role of time as an active field, following Kozyrev and a recent experiment in non-relativistic quantum systems. We associate the Hodge dual of the drift vector field with a possible angular-momentum source for the phenomenae observed by Kozyrev. (shrink)

The sources to which one has to turn for information about the lives of Hasidic masters belong to the hagiographical tradition. During its first stage of compilation in the early nineteenth century, this tradition preserved much authentic historical and biographical material, in spite of the explicit disavowal of any historiographical intent by its editors. They were apologetic about the publication of "mere tales and histories" whose value lay not in the preservation of historical records but rather in their capacity for (...) moral and religious edification. Up until then, this material had been circulating orally but, in contrast to speculative-homiletical works, was not recognized as a legitimate and useful tool for the propagation of Hasidism. However, from the second half of the nineteenth century, in response to the challenges of Jewish Enlightenment, secularization, and most directly in response to the scornful critique of Hasidism and its hagiography which was emanating from the new school of modern Jewish historiography, Hasidic authors, like the exponents of other nineteenth-century ideologies, were beginning to appeal to history for validation. They were adopting the scholarly mannerisms if not quite the historical methodology of their critics. Since the hagiographical tales, and the chain of oral transmission which had traditionally preserved and authenticated them, were both losing their credibility in the new atmosphere of rationalistic skepticism and scientific rigor, Hasidic hagiographers were now eager to present their morally edifying oral traditions as reliable historical records by anchoring them in concrete documentary evidence. The forgeries of the Kherson Genizah supplied what appeared to be incontestable "archival" verification of the tales. The Admor Joseph Isaac Schneersohn exploited the Kherson "documents" in his extensive histories of early Hasidism which reveal his anachronistic, typological thinking and are often incompatible with the facts. As a leader of HaBaD Hasidism at a time of crisis, he saw it as his duty to harness the powerful historiographical idiom to the tasks of rehabilitating the HaBaD movement and of campaigning for the preservation of Orthodox Jewish life in conditions of unprecedented adversity. (shrink)

It remains to summarize the contributions which each of the three disciplines discussed here is making toward the development of a science of man. "Significs" makes a study of the effects on human behavior of the linguistic aspects of the evaluative process, the most distinctly human aspect of the behavior of the human organism. "Mathematical Biophysics" seeks to describe the events associated with evaluative processes in physico-mathematical terms. "Cybernetics" is discovering important invariants common to these processes and others, particularly those (...) observed in man-made machines and in situations which lend themselves to description in thermo-dynamic or statistical (order -- chaos) terms. (shrink)

The authors suggest that social movements research should recognize more the potential of the protesting body as an agent of social and political change. This contention is based on studying the relations among the body, gender, and knowledge in social protest by comparing two Israeli-Jewish leftist protest movements, a woman-only movement and a mixed-gender one, which protested against the Israeli Occupation in the early 1990s. The comparison reveals reversed patterns of body/knowledge relations, each connoting a different meaning and outcome of (...) the social protest. In the mixed movement, the body served as an instrument in carrying out the political knowledge and thus was left unmarked. In Women in Black, on the other hand, the body was the message, as it produced and articulated political ideology, simultaneously challenging the national security legacy and the gender order in Israel. (shrink)

In relating the problem of comparison to that of conceptualization, Dr. Sjoberg brings into focus a central methodological problem of social science. For to compare is to discover unity in diversity and differences among similarities, that is, to uncover structure. The first act in this process is to name the parts and the relations among them, and naming, of course, both stems from and induces conceptualizations.

Let us begin by proposing a sort of common denominator of the various conceptions of rationality, some feature that underlies practically all its definitions.

Almost anyone seriously interested in decision theory will name John von Neumann's (1928) Minimax Theorem as its foundation, whereas Utility and Rationality are imagined to be the twin towers on which the theory rests. Yet, experimental results and real-life observations seldom support that expectation. Over two centuries ago, Hume (1739–40/1978) put his finger on the discrepancy. “Reason,” he wrote “is, and ought to be the slave of passions, and can never pretend to any other office than to serve and obey (...) them.” In other words, effective means to reach specific goals can be prescribed, but not the goals. A wide range of experimental results and daily life behavior support this dictum. (shrink)

The writings of the medieval Islamic scholar Taqi al-Din Ibn Taymiyya are used today by radical groups, such as al-Qaeda, to justify acts of terrorism. In order to explain this modern influence, this volume offers a fresh perspective on Ibn Taymiyya's life, thought and legacy. Contrary to his current image as an anti-rationalist puritan, it argues that Ibn Taymiyya is one of the most intellectually complex, rigorous and interesting figures in Islamic intellectual history.

Taqi al-Din Ibn Taymiyya is one of the most controversial thinkers in Islamic history. Today he is revered by what is called the Wahhabi movement and championed by Salafi groups who demand a return to the pristine golden age of the Prophet.

This article explores the ethical challenges of providing Medical Assistance in Dying (MAID) in a paediatric setting. More specifically, we focus on the theoretical questions that came to light when we were asked to develop a policy for responding to MAID requests at our tertiary paediatric institution. We illuminate a central point of conceptual confusion about the nature of MAID that emerges at the level of practice, and explore the various entailments for clinicians and patients that would flow from different (...) understandings. Finally, we consider the ethical challenges of building policy on what is still an extremely controversial social practice. While MAID is currently available to capable patients in Canada who are 18 years or older—a small but important subsection of the population our hospital serves—we write our policy with an eye to the near future when capable young people may gain access to MAID. We propose that an opportunity exists for MAID-providing institutions to reduce social stigma surrounding this practice, but not without potentially serious consequences for practitioners and institutions themselves. Thus, this paper is intended as a road map through the still-emerging legal and ethical landscape of paediatric MAID. We offer a view of the roads taken and considered along the way, and our justifications for travelling the paths we chose. By providing a record of our in-progress thinking, we hope to stimulate wider discussion about the issues and questions encountered in this work. (shrink)

In this transdisciplinary article which stems from philosophical considerations (that depart from phenomenology—after Merleau-Ponty, Heidegger and Rosen—and Hegelian dialectics), we develop a conception based on topological (the Moebius surface and the Klein bottle) and geometrical considerations (based on torsion and non-orientability of manifolds), and multivalued logics which we develop into a unified world conception that surmounts the Cartesian cut and Aristotelian logic. The role of torsion appears in a self-referential construction of space and time, which will be further related to (...) the commutator of the True and False operators of matrix logic, still with a quantum superposed state related to a Moebius surface, and as the physical field at the basis of Spencer-Brown’s primitive distinction in the protologic of the calculus of distinction. In this setting, paradox, self-reference, depth, time and space, higher-order non-dual logic, perception, spin and a time operator, the Klein bottle, hypernumbers due to Musès which include non-trivial square roots of ±1 and in particular non-trivial nilpotents, quantum field operators, the transformation of cognition to spin for two-state quantum systems, are found to be keenly interwoven in a world conception compatible with the philosophical approach taken for basis of this article. The Klein bottle is found not only to be the topological in-formation for self-reference and paradox whose logical counterpart in the calculus of indications are the paradoxical imaginary time waves, but also a classical-quantum transformer (Hadamard’s gate in quantum computation) which is indispensable to be able to obtain a complete multivalued logical system, and still to generate the matrix extension of classical connective Boolean logic. We further find that the multivalued logic that stems from considering the paradoxical equation in the calculus of distinctions, and in particular, the imaginary solutions to this equation, generates the matrix logic which supersedes the classical logic of connectives and which has for particular subtheories fuzzy and quantum logics. Thus, from a primitive distinction in the vacuum plane and the axioms of the calculus of distinction, we can derive by incorporating paradox, the world conception succinctly described above. (shrink)

Mariage et séparation à Damas au moyen âge: Un corpus de 62 documents juridiques inédits entre 337/948 et 698/1299. Edited by Jean-Michel Mouton, Domi nique Sourdel, and Janine Sourdel-Thomine. Documents relatifs à l’histoire des Croisades, vol. 21. Paris: L’Académie des Inscriptions et Belles- Lettres, 2013. Pp. 327, illus. €40.

The Criminal Underworld in a Medieval Islamic Society: Narratives from Cairo and Damascus under the Mamluks. By Carl F. Petry. Chicago Studies on the Middle East, vol. 9. Chicago: Middle East Documentation Center, 2012. Pp. viii + 365. $70.

New, “smart,” automated technologies for the home are playing a growing role in the construction and refurbishment of many new middle and upper class homes and assisted living facilities in the developed world, promising the improved performance of domestic tasks, as well as enhanced safety, convenience, and efficiency. Expanding the growing automatization of many activities in daily life, automated technologies in the home are interactive, ubiquitous, and often invisible. Their installation, in what is understood to be the locus of personal (...) autonomy and identity, promotes a rethinking on the notion of the self as it is shaped and reshaped within the home. Because these technologies are user-centric, they bring to mind questions as to how their users are envisioned. The current study will focus on human physicality and on the materiality of the body as it is envisaged in the technologies themselves through the study of three automated domestic systems. It will ask if and how our understanding of being a body—or, perhaps, of having one—is redefined as these new technologies assume a growing role in the living of everyday domestic life. (shrink)

We present the Dirac and Laplacian operators on Clifford bundles over space–time, associated to metric compatible linear connections of Cartan–Weyl, with trace-torsion, Q. In the case of nondegenerate metrics, we obtain a theory of generalized Brownian motions whose drift is the metric conjugate of Q. We give the constitutive equations for Q. We find that it contains Maxwell’s equations, characterized by two potentials, an harmonic one which has a zero field (Bohm-Aharonov potential) and a coexact term that generalizes the Hertz (...) potential of Maxwell’s equations in Minkowski space.We develop the theory of the Hertz potential for a general Riemannian manifold. We study the invariant state for the theory, and determine the decomposition of Q in this state which has an invariant Born measure. In addition to the logarithmic potential derivative term, we have the previous Maxwellian potentials normalized by the invariant density. We characterize the time-evolution irreversibility of the Brownian motions generated by the Cartan–Weyl laplacians, in terms of these normalized Maxwell’s potentials. We prove the equivalence of the sourceless Maxwell equation on Minkowski space, and the Dirac-Hestenes equation for a Dirac-Hestenes spinor field written on Minkowski space provided with a Cartan–Weyl connection. If Q is characterized by the invariant state of the diffusion process generated on Euclidean space, then the Maxwell’s potentials appearing in Q can be seen alternatively as derived from the internal rotational degrees of freedom of the Dirac-Hestenes spinor field, yet the equivalence between Maxwell’s equation and Dirac-Hestenes equations is valid if we have that these potentials have only two components corresponding to the spin-plane. We present Lorentz-invariant diffusion representations for the Cartan–Weyl connections that sustain the equivalence of these equations, and furthermore, the diffusion of differential forms along these Brownian motions. We prove that the construction of the relativistic Brownian motion theory for the flat Minkowski metric, follows from the choices of the degenerate Clifford structure and the Oron and Horwitz relativistic Gaussian, instead of the Euclidean structure and the orthogonal invariant Gaussian. We further indicate the random Poincaré–Cartan invariants of phase-space provided with the canonical symplectic structure. We introduce the energy-form of the exact terms of Q and derive the relativistic quantum potential from the groundstate representation. We derive the field equations corresponding to these exact terms from an average on the invariant state Cartan scalar curvature, and find that the quantum potential can be identified with 1 / 12R(g), where R(g) is the metric scalar curvature. We establish a link between an anisotropic noise tensor and the genesis of a gravitational field in terms of the generalized Brownian motions. Thus, when we have a nontrivial curvature, we can identify the quantum nonlocal correlations with the gravitational field. We discuss the relations of this work with the heat kernel approach in quantum gravity. We finally present for the case of Q restricted to this exact term a supersymmetric system, in the classical sense due to E.Witten, and discuss the possible extensions to include the electromagnetic potential terms of Q. (shrink)

In their summary and critique, Gamble, Gamble, and Pruski mischaracterise both the central arguments and the primary objectives of our original paper. Our paper does not provide an ethical justification for paediatric Medical Assistance in Dying by comparing it with other end of life care options. In fact, it does not offer arguments about the permissibility of MAID for capable young people at all. Instead, our paper focuses on the ethical questions that emerged as we worked to develop a policy (...) for responding to MAID requests at our tertiary paediatric institution. Following the Supreme Court of Canada’s recent decriminalisation of MAID, our hospital needed to answer immediate on-the-ground questions such as: ‘What are we going to do if an 18-year-old patient in our care requested MAID today, as is now their legal right? How should we protect their privacy? What is the best way to ensure patients are informed when making these decisions?’ On these important questions, Gamble, Gamble, and Pruskiare silent. (shrink)

The Villages of the Fayyum: A Thirteenth-Century Register of Rural, Islamic Egypt. Edited and translated by Yossef Rapoport and Ido Shahar. The Medieval Countryside, vol. 18. Turnhout: Brepols, 2018. Pp. viii + 260. €90. Rural Economy and Tribal Society in Islamic Egypt: A Study of al-Nābulsī’s Villages of the Fayyum. By Yossef Rapoport. The Medieval Countryside, vol. 19. Turnhout: Brepols, 2018. Pp. xxix + 285. €110.

In developing their policy on paediatric medical assistance in dying (MAID), DeMichelis, Shaul and Rapoport decide to treat euthanasia and physician-assisted suicide as ethically and practically equivalent to other end-of-life interventions, particularly palliative sedation and withdrawal of care (WOC). We highlight several flaws in the authors’ reasoning. Their argument depends on too cursory a dismissal of intention, which remains fundamental to medical ethics and law. Furthermore, they have not fairly presented the ethical analyses justifying other end-of-life decisions, analyses and (...) decisions that were generally accepted long before MAID was legal or considered ethical. Forgetting or misunderstanding the analyses would naturally lead one to think MAID and other end-of-life decisions are morally equivalent. Yet as we recall these well-developed analyses, it becomes clear that approving of some forms of sedation and WOC does not commit one to MAID. Paediatric patients and their families can rationally and coherently reject MAID while choosing palliative care and WOC. Finally, the authors do not substantiate their claim that MAID is like palliative care in that it alleviates suffering. It is thus unreasonable to use this supposition as a warrant for their proposed policy. (shrink)

This paper explores the use of chemical symbolism in works by the new media artist Sonya Rapoport, with a focus on the pivotal Cobalt series from the late 1970s. These works, drawings on computer printouts generated by research at the Lawrence Berkeley Laboratory, respond to experiments in nuclear chemistry. They mark the beginning of three productive decades in which Rapoport produced a variety of images related to chemistry in her work. She states, “I looked for authentic research projects (...) that were interesting to me, preferably with captivating pictorial subject matter. Then came the creative chaotic process of resolving a cohesive product that combined scientific research with art concept.” Rapoport had an unusual degree of access to scientific materials through her husband, organic chemist Henry Rapoport, a faculty member at the University of California, Berkeley. At the time of production, these works were outside mainstream art world interests and they have received little critical attention. This paper examines the development of Rapoport’s images and places her use of chemical references in context in her lifetime of work. (shrink)