Recent evidence shows that dynamic instability is the dominant mechanism for the assembly of pure tubulin in vitro and for the great majority of microtubules in the mitotic spindle and the interphase cytoplasmic microtubule complex. The basic concepts of this model provide a framework for future characterization of the molecular basis of spatial and temporal regulation of microtubule dynamics in the cell and the function of microtubule dynamics in motile processes such as chromosome movement.

Corporate social responsibility (CSR) has emerged as an effective way for firms to create favorable attitudes among consumers. Although prior research has addressed the direct influence of proactive and reactive CSR on consumer responses, this research hypothesized that consumers’ perceived organizational motives (i.e., attributions) will mediate this relationship. It was also hypothesized that the source of information and location of CSR initiative will affect the motives consumers assign to a firms’ engagement in the initiative. Two experiments were conducted to test (...) these hypotheses. The results of Study 1 indicate that the nature of a CSR initiative influences consumer attribution effects and that these attributions act as mediators in helping to explain consumers’ responses to CSR. Study 2 suggests that the source of the CSR message moderates the effect of CSR on consumer attributions. The mediating influence of the attributions as well as the importance of information source suggests that proper communication of CSR can be a viable way to inculcate positive corporate associations and purchase intentions. (shrink)

Aristotle’s views on the choiceworthiness of friends might seem both internally inconsistent and objectionably instrumentalizing. On the one hand, Aristotle maintains that perfect friends or virtue friends are choiceworthy and lovable for their own sake, and not merely for the sake of further ends. On the other hand, in Nicomachean Ethics IX.9, Aristotle appears somehow to account for the choiceworthiness of such friends by reference to their utility as sources of a virtuous agent’s robust self-awareness. I examine Aristotle’s views on (...) the utility and choiceworthiness of friends, and offer a novel reading of Nicomachean Ethics IX.9. On this reading, Aristotle accepts a version of instrumental conditionalism about final value, that is, the thesis that goods (including friends) can be choiceworthy for their own sake (i.e., possess final or end value) at least partly on account of their instrumental properties. In articulating what sort of instrumental conditionalism it is reasonable to attribute to Aristotle, I argue that Aristotle appeals to the utility of perfect friends as part of a broadly material causal account of why such friends are choiceworthy for their own sake. On this reading, perfect friends are not choiceworthy for the sake of their utility in eliciting self-awareness; rather, their choiceworthiness for their own sake is (at least partly) realized in, or constituted by, their conduciveness to the virtuous agent’s self-awareness. This reading, I argue, frees Aristotle from the charge of inconsistency: Aristotle can appeal to the conduciveness of perfect friends to the virtuous agent’s self-awareness as a way of explaining why such friends are choiceworthy for their own sake. (shrink)

How do people come to opposite causal judgments about societal problems, such as whether a public health policy reduced COVID‐19 cases? The current research tests an understudied cognitive mechanism in which people may agree about what actually happened (e.g., that a public health policy was implemented and COVID‐19 cases declined), but can be made to disagree about the counterfactual, or what would have happened otherwise (e.g., whether COVID‐19 cases would have declined naturally without intervention) via comparison cases. Across two preregistered (...) studies (total N = 480), participants reasoned about the implementation of a public policy that was followed by an immediate decline in novel virus cases. Study 1 shows that people's judgments about the causal impact of the policy could be pushed in opposite directions by emphasizing comparison cases that imply different counterfactual outcomes. Study 2 finds that people recognize they can use such information to influence others. Specifically, in service of persuading others to support or reject a public health policy, people systematically showed comparison cases implying the counterfactual outcome that aligned with their position. These findings were robust across samples of U.S. college students and politically and socioeconomically diverse U.S. adults. Together, these studies suggest that implied counterfactuals are a powerful tool that individuals can use to manufacture others’ causal judgments and warrant further investigation as a mechanism contributing to belief polarization. (shrink)

Proofs of Prophecy and the Refutation of the Ismāʿīliyya: The Kitāb Ithbāt nubuwwat al-nabī by the Zaydī al-Muʾayyad bi-llāh al-Hārūnī. By Eva-Maria Lika. Worlds of Islam, vol. 9. Berlin: de Gruyter, 2018. Pp. vii + 177, 152. $149.99, €129.95, £106.99.

The notion of a Sasaki projectionon an orthomodular lattice is generalized to a mapping Φ: E × E → E, where E is an effect algebra. If E is lattice ordered and Φ is symmetric, then E is called a Φ-symmetric effect algebra.This paper launches a study of such effect algebras. In particular, it is shown that every interval effect algebra with a lattice-ordered ambient group is Φ-symmetric, and its group is the one constructed by Ravindran in his proof that (...) every effect algebra that has the Riesz decomposition property is an interval algebra. It is shown that the doubling construction introduced in the paper is connected to the conditional event algebrasof Goodman, Nguyen, and Walker. (shrink)

In his previous book, La philosophie et les experiences naturelles, A. De Waelhens claims that great philosophers in the past have not only been in dialogue with their predecessors but also that each great philosopher benefited from a confrontation with a non-philosophical experience. This previous book forms the theoretical justification for the present one. Here the author studies the problem of psychosis, with the hope and the intention of contributing to the further development of philosophy. Insofar as philosophy is fascinated (...) with the obligation "Learn to know yourself" or the search for an answer for the question "Who am I," insofar so claims the author, contemporary philosophy cannot afford to bypass psychoanalysis. The book has six chapters and a conclusion, but could easily be divided in three parts. The first part is a survey of the general approach to psychosis and schizophrenia by a selected group of European psychiatrists. The author indicates the crucial shortcomings of each approach and shows how there is among them a gradual turning away from a physiological interpretation of schizophrenia and psychosis towards a psychological one. In Part II, the author uses mainly the theory of Lacan and his disciples to present a coherent theory of psychosis. The crucial concepts are 1) the Oedipus-complex, 2) the mirror stage, 3) the foreclosure of a reference to the father. The Oedipus-complex is well known from Freud’s works although it receives here a more structural interpretation. The mirror stage refers to the events around 6-8 months when the child has to appropriate himself as a unified body, not just a collection of partial elements. This task can be noticed easily when one observes the attitude of the child towards the mirror. Hence the name. In order to perform this task successfully the child needs the support of the mother. The function of the mother is still more important for the third problem: a reference to the father. A healthy development of the child requires that the mother is capable of recognizing and of acknowledging the part played by the father in the creation of the child. This is done in our culture by giving the child the name of the father. Mothers of psychotics often are emotionally unable to tolerate that. They want to situate their child exclusively in relation to themselves: they foreclose any reference to the father. Psychosis is therefore related to the foreclosure of the name-of-the-father. These three crucial concepts allow the author to explain the crucial symptoms of schizophrenia, and to compare it with paranoia and paraphrenia. The third part of the book is a philosophical discussion of the problem of psychosis. The author offers the continental philosophical tradition as a better intellectual framework to study psychosis than the physical framework that Freud used in his Project for a Scientific Psychology and that he never completely abandoned. In the conclusion A. De Waelhens summarizes the direct philosophical consequences of the study of psychosis, the most fascinating being that one has to recognize the priority of language in the constitution of the subject, and that there is a meaningful relation between the way I relate to myself, the things and other people. Two improvements could be made in the book. The first is pedagogical: i.e., a critical bibliography of the crucial works of Lacan and his school and of the phenomenological tradition would have been very helpful for any reader not familiar with one of the two streams of thought. A second improvement would be the inclusion in Chapter One of a discussion of the development which has taken place in the U.S.A. in the explanation of schizophrenia. It is parallel with the development in Europe. A useful reference is E. G. Mishler and N. E. Walker: "Family Interaction Processes and Schizophrenia: A Review of Current Theories," in International Journal of Psychiatry, July 1966, Vol. 2, Number 4. Although the book is difficult, it is very insightful and provocative and it certainly merits translation.—W. V. E. (shrink)

Friedmann–Robertson–Walker (FRW) space–time with bulk viscosity in the context of f(R) gravity is considered. The field equations are solved for the Power and Exponential volumetric expansion. Two types of functional relationship i.e. f(R) = R + bRm and f(R)=R-λ4R\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\,f(R) = R - \frac{{\lambda^{4} }}{R}$$\end{document} are investigated. The Phantom, Chaplygin gas and Tachyon fields are discussed. It is observed that the universe is open and inflationary.

The exact sectarian affiliation of Shahrastānī has long been a matter of serious debate. Was he possibly an adherent of the Ismaili cause? Considerable recent scholarship purports to establish a connection. The evidence consists of some off-handed remarks by his own contemporaries; what he himself has to say about the Ismailis in his Kitāb al-Milal wa-l-niḥal; and finally, a set of doctrines or analytical categories he uses in his later writings that were later adopted by Nizari Ismailis. However, an impartial (...) look at the evidence does not support the claim that Shahrastānī was himself in any significant way an Ismaili. (shrink)

Evidence‐based interventions have been developed and used to prevent HIV infections among black men who have sex with men (MSM) in Canada and the United States; however, the degree to which interventions address racism and other interlocking oppressions that influence HIV vulnerability is not well known. We utilize integrative antiracism to guide a review of HIV prevention intervention studies with black MSM and to determine how racism and religious oppression are addressed in the current intervention evidence base. We searched CINAHL, (...) PsychInfo, MEDLINE and the CDC compendium of evidence‐based HIV prevention interventions and identified seventeen interventions. Three interventions targeted black MSM, yet only one intervention addressed racism, religious oppression, cultural assets and religious assets. Most interventions' samples included low numbers of black MSM. More research is needed on interventions that address racism and religious oppression on HIV vulnerability among black MSM. Future research should focus on explicating mechanisms by which multiple oppressions impact HIV vulnerability. We recommend the development and integration of social justice tools for nursing practice that aid in addressing the impacts of racism and other oppressions on HIV vulnerability of black MSM. (shrink)

The human genome is not a uniform structure but, instead, is a mosaic of bands. Some of these bands can be seen by the eye. Stained with Giemsa and viewed under the microscope each human chromosome has a prototypical pattern of light and dark bands (G and R bands respectively). Other bands are not so easily viewed. The human genome is, for example, a mosaic of isochores, blocks of DNA within which the proportion of the bases G and C at (...) silent sites (introns, third positions in codons, intergene spacer) is fairly uniform. Recent work by Matassi and colleagues(1) has revealed what might be a new and unexpected banding pattern. They have found that the genes which are close together on the chromosome have similar rates of evolution. BioEssays 22:105–107, 2000. ©2000 John Wiley & Sons, Inc. (shrink)

Editors and commentators ancient and modern have not responded very well to the challenge of the two riddles which round off the contest between Damoetas and Menalcas at the end of Eclogue 3 . The first is generally regarded as impossibly difficult; the second as impossibly easy. Critics take refuge in quoting Servius' despairing statement: sciendum aenigmata haec sicuti pleraque carere aperta solutione. Yet it is most unlikely that Virgil would introduce insoluble or meaningless riddles into the Bucolica. If there (...) is no solution the lines become pointless, even tasteless; and these are not epithets to be applied lightly to Virgil's poetry. (shrink)