Context. The identification of the sources that reionized the Universe and their specific contribution to this process are key missing pieces of our knowledge of the early Universe. Faint star-forming galaxies may be the main contributors to the ionizing photon budget during the epoch of reionization, but their escaping photons cannot be detected directly due to inter-galactic medium opacity. Hence, it is essential to characterize the properties of faint galaxies with significant Lyman continuum photon leakage up to z 4 to (...) define indirect indicators allowing analogues to be found at the highest redshift. Aims. Long gamma-ray bursts explode typically in star-forming regions of faint, star-forming galaxies. Through LGRB afterglow spectroscopy it is possible to detect directly LyC photons. Our aim is to use LGRBs as tools to study LyC leakage from faint, star-forming galaxies at high redshift. Methods. Here we present the observations of LyC emission in the afterglow spectra of GRB 191004B at z = 3:5055, together with those of the other two previously known LyC-emitting LGRB, to determine their LyC escape fraction and compare their properties. Results. From the afterglow spectrum of GRB 191004B we determine a neutral hydrogen column density at the LGRB redshift of og =17:2 0:15, and negligible extinction. The only metal absorption lines detected are C iv and Si iv. In contrast to GRB 050908 and GRB 060607A, the host galaxy of GRB 191004B displays significant Ly emission. From its Ly emission and the non-detection of Balmer emission lines we constrain its star-formation rate to 1 SFR 4:7 M yr. 1. We fit the Ly emission with a shell model and find parameters values consistent with the observed ones. The absolute LyC escape fractions we find for GRB 191004B, GRB 050908 and GRB 060607A are of 0:35+0:10.0:11, 0:08+0:05.0:04 and :20+0:05.0:05, respectively. We compare the LyC escape fraction of LGRBs to the values of other LyC emitters found from the literature, showing that LGRB afterglows can be powerful tools to study LyC escape for faint high-redshift star-forming galaxies. Indeed we could push LyC leakage studies to much higher absolute magnitudes. The host galaxies of the three LGRB presented here have all M1600 >.19:5 mag, with the GRB 060607A host at M1600 >.16 mag. LGRB hosts may therefore be particularly suitable for exploring the ionizing escape fraction in galaxies that are too faint or distant for conventional techniques. Furthermore the time investment is very small compared to galaxy studies. (shrink)

Features include a comprehensive review of existing material, combined with new perspectives to equip students for the challenges in the work environment; chapter overviews and student learning objectives offer a solid and useful framework in which to organise study; diagrams and charts present overviews and contexts for the subject to act as useful revision aids; effective pedagogy including a review of the arguments considered, a menu of seminar topics, and questions in every chapter, serving as an ideal basis for seminar (...) study; and additional open-ended simulations to allow students to work through unfolding scenarios. (shrink)

Education is so strongly emphasized in the Chinese culture that academic success is widely regarded as the only indicator of success, while too much physical activity is often discouraged because it drains energy and affects academic concentration. This study investigated the relations among academic achievement, self?esteem, school conduct and physical activity level. The participants were 333 Chinese pre?adolescents (aged 8?12) in Hong Kong. Examination results and conduct grades were obtained from the school records. Global self?esteem was measured with the Physical (...) self?description questionnaire (PSDQ), while physical activity patterns of the children were assessed with the Physical activity questionnaire for children (PAQ?C). Results showed that high academic achievers consistently attained better school conduct marks. However, physical activity level was quite an independent entity that was related neither to academic achievement nor school conduct. Furthermore, regression analyses showed that only academically high?achieving boys and physically active boys had higher self?esteem. (shrink)

An adequate theory of rights ought to forbid the harming of animals to promote trivial interests of humans, as is often done in the animal-user industries. But what should the rights view say about situations in which harming some animals is necessary to prevent intolerable injustices to other animals? I develop an account of respectful treatment on which, under certain conditions, it’s justified to intentionally harm some individuals to prevent serious harm to others. This can be compatible with recognizing the (...) inherent value of the ones who are harmed. My theory has important implications for contemporary moral issues in nonhuman animal ethics, such as the development of cultured meat and animal research. (shrink)

How best to avoid the Levinas Effect, as it has been called, the tendency to make Emmanuel Levinas everything to everyone? One way is to demonstrate that Levinas's thinking does not fit into any of the categories by which we ordinarily approach political theory. If one were forced to categorize Levinas's political theory, the term "inverted liberalism " would come closest to the mark. As long, that is, as one emphasizes the term "inverted" over "liberalism." Levinas's defense of liberalism is (...) likely the strangest defense the reader has encountered. We should, argues Levinas, foster and protect the individual because only the individual can see the tears of the other, the tears that even the just regime cannot see. The individual is to be fostered and protected for the sake of the other individual. Whether this has anything to do with "real" liberalism, and whether it should, is the topic of this essay. (shrink)

Corporate governance is increasingly becoming an issue of global concern, not least because we are more and more living in a corporate world that transcends international boundaries. The main purpose and motivation of this study is to determine how the international community should motivate businesses in fostering exemplary corporate governance, therefore eliminating obstacles to ethically exemplary behavior. The empirical approach utilized here has been applied to 161 businesses, both listed and over-the-counter (OTC) companies, with the results indicating that ethical considerations, (...) corporate governance and organizational performance are inextricably linked and, to an extent, demonstrably proportional. This study also indicates a major finding that family management is a significant mediating variable of the ethical considerations of corporate governance and organizational performance. Finally, this study has developed an operational model of ethical considerations of corporate governance as a consultancy aid for businesses that wish to implement and/or boost their performance in respect to corporate governance. (shrink)

This article considers various approaches used in complementary and alternative medicine research, and discusses the challenges that reviewing such research poses for Human Research Ethics Committees. Drawing on our experience with the University of Technology Sydney HREC, we offer some suggestions about how ethical principles governing conventional medical research can be applied in the context of research in complementary and alternative medicine. We argue that effective HREC review requires members to gain familiarity with such research, which helps ensure that such (...) research is conducted rigorously and ethically. (shrink)

Identity theory The doctrine that mental states are identical with physical states was defended in antiquity by Lucretius and in the early modern era by Hobbes. It achieved considerable prominence in the 1950s as a result of the writings of Herbert Feigl, U. T. Place, and J. J. C. Smart. (See, e.g., Smart (1959). These authors developed reasonably precise formulations of the doctrine, clarified the grounds for embracing it, and responded persuasively to a range of objections. More recently it has (...) been defended systematically by Hill (1991) and Papineau (2002). Other contemporary advocates include Loar (1990), McLaughlin (2004), and Polger (2005). The doctrine also figures explicitly or implicitly in the writings of dualists, who are of course concerned to oppose it. Thus, for example, it plays an important role in Kripke’s influential defense of dualism (Kripke 1980). (shrink)

Galileo's Error (Goff, 2019) leaves important questions unasked and hence unanswered. I focus on two of these: the question of what a theory of consciousness is supposed to accomplish, and the question of what the materialismâ–“dualismâ–“panpsychism debate is actually about.

In lieu of an abstract, here is a brief excerpt of the content: Reviewed by Sextus, Montaigne, Hume: Pyrrhonizers by Brian C. Ribeiro Donald C. Ainslie Brian C. Ribeiro. Sextus, Montaigne, Hume: Pyrrhonizers. Brill: Leiden, 2021. Pp. 165. Hardback, $154.00. Brian C. Ribeiro’s Sextus, Montaigne, Hume: Pyrrhonizers is a charming and quirky investigation of his three titular skeptics. It is perhaps best understood as a skeptical investigation of skepticism. By that I mean that, like a good Pyrrhonist, Ribeiro explains how (...) things appear to him without claiming to lay down a doctrine or dogma. His topic is how and why skepticism still matters (7). And he suggests that those who are moved by skeptical arguments can learn intellectual modesty from them and thereby achieve a degree of philosophical “calmness of soul” (141).Ribeiro approaches his three figures by taking the cogency of their skeptical arguments for granted. There is little investigation of why these philosophers call various beliefs into question, and his concern is rather what remains once the skeptical doubts are taken on board. Because what he calls “Pyrrhonizing” philosophers reveal that large swaths of our beliefs lack epistemic merit, they also show us how we are not fully rational creatures in our everyday lives. In the case of Sextus, Ribeiro’s focus is on the famous question of whether skeptics can live their skepticism once they have actually suspended all belief. With Sextus, as with Montaigne and Hume, Ribeiro opts for the more radical of the interpretive options; he is not persuaded by Michael Frede’s suggestion that Pyrrhonists restrict their suspension only to abstruse matters, not the everyday (51). But even if we follow the “four-fold way” (20–23) that Sextus offers us as guides for life—the directives of nature, feelings, custom, and expertise—Ribeiro still thinks we will inevitably fall back into belief. He concludes that the original Pyrrhonists should be read aspirationally: insofar as we develop our capacities [End Page 517] to argue on both sides of every question and thus are able to suspend judgment, to that extent we will achieve tranquility. In the case of Montaigne, Ribeiro focuses on his Christian fideism. Once he recognizes the incapacity of reason to resolve intellectual problems, he falls back on faith. And Ribeiro argues that the Catholic flavor of this faith is simply a reflection of Montaigne’s surroundings. In a different community, he could just as easily have embraced a different faith. The heart of the book concerns Hume, whom Ribeiro discusses in three chapters, as opposed to the one each devoted to Sextus and Montaigne. In keeping with his interpretive preferences, Ribeiro’s Hume is a radical skeptic, though he acknowledges the significant yet “utterly perplexing” (95n22) naturalist strains that are also present. Ribeiro takes the resulting tension to be insoluble (98), though I was not convinced. Consider that, in both the Treatise and the Enquiry, Hume uses causal reasoning to investigate causal reasoning. He learns that our ideas are caused by prior impressions; that repeated experience of conjoint events causes us to associate our ideas of similar events; and so on. In the Treatise, he concludes the argument that association is at the root of such causal reasoning by presenting a set of rules, a “logic,” for it. The argument is not as such skeptical, though when Hume “recasts” it in the first Enquiry, he does so in terms of “sceptical doubts” and a “sceptical solution.” In the Treatise, “total” and “extravagant” skepticism come into play only as “systems of philosophy” that Hume uses to shed light on his own core commitments. The problem, I think, is that Ribeiro tends to read Hume a little too literally, as if he is himself falling prey to the skeptical upheaval of the conclusion to the first book of the Treatise, or the final section of the first Enquiry. But I would suggest that Hume is rather deploying the rhetoric of skepticism in these discussions, using it for his ultimate philosophical ends (a point that is especially clear in Ribeiro’s favorite of Hume’s works, the Dialogues). He is showing his reader how his naturalistic philosophical project is itself rooted in human nature, and thus does not yield insight into the intrinsic structure of... (shrink)