We construct a recursive ultrapower F/U such that F/U is a tame 1-model in the sense of [6, §3] and FU is existentially incomplete in the models of II2 arithmetic. This enables us to answer in the negative a question about closure with respect to recursive fibers of certain special semirings Γ of isols termed tame models by Barback. Erik Ellentuck had conjuctured that all such semirings enjoy the closure property in question. Our result is that while many do, some (...) do not. (shrink)

Given a Δ1 ultrapower ℱ/[MATHEMATICAL SCRIPT CAPITAL U], let ℒU denote the set of all Π2-correct substructures of ℱ/[MATHEMATICAL SCRIPT CAPITAL U]; i.e., ℒU is the collection of all those subsets of |ℱ/[MATHEMATICAL SCRIPT CAPITAL U]| that are closed under computable functions. Defining in the obvious way the lattice ℒ) with domain ℒU, we obtain some preliminary results about lattice embeddings into – or realization as – an ℒ. The basis for these results, as far as we take the matter, (...) consists of the well-known class of minimal ℱ/[MATHEMATICAL SCRIPT CAPITAL U]'s, which function as atoms, and the class of minimalfree ℱ/[MATHEMATICAL SCRIPT CAPITAL U]'s, to whose nonemptiness a substantial section of the paper is devoted. It is shown that an infinite, convergent monotone sequence together with its limit point is embeddable in an ℒ, and that the initial segment lattices {0, 1,…, n } are not just embeddable in , but in fact realizable as, lattices ℒ. Finally, the diamond is embeddable; and if it is not realizable, then either the 1 - 3 - 1 lattice or the pentagon is at least embeddable. (shrink)

In his long and illuminating paper [1] Joe Barback defined and showed to be non-vacuous a class of infinite regressive isols he has termed “complete y torre” isols. These particular isols a enjoy a property that Barback has since labelled combinatoriality. In [2], he provides a list of properties characterizing the combinatoria isols. In Section 2 of our paper, we extend this list of characterizations to include the fact that an infinite regressive isol X is combinatorial if and only if (...) its associated Dekker semiring D satisfies all those Π2 sentences of the anguage LN for isol theory that are true in the set ω of natural numbers. of the various function and relation symbols of LN via the “lifting ” to D of their Σ1 definitions in ω coincide with their interpretations via isolic extension.) We also note in Section 2 that Π2-correctness, for semirings D, cannot be improved to Π 3-correctness, no matter how many additional properties we succeed in attaching to a combinatoria isol; there is a fixed equation image sentence that blocks such extension. In Section 3, we provide a proof of the existence of combinatorial isols that does not involve verification of the extremely strong properties that characterize Barback's CT isols. (shrink)

Let Λ denote the semiring of isols. We characterize existential completeness for Nerode subsemirings of Λ, by means of a purely isol-theoretic “Σ1 separation property”. Our characterization is purely isol-theoretic in that it is formulated entirely in terms of the extensions to Λ of the Σ1 subsets of the natural numbers. Advantage is taken of a special kind of isol first conjectured to exist by Ellentuck and first proven to exist by Barback . In addition, we strengthen the negative part (...) of [13] by showing that existential completeness is not secured, for a given Nerode semiring, by either a certain “functional closure” property for the extensions of partial recursive functions or the property of “pulling in” some portion of each partial recursive fiber; these latter results are perhaps a little surprising. (shrink)

I : PETRARCH'S BRITAIN 1: Piero Boitani: Petrarch and the barbari Britanni II: PETRARCH AND THE SELF 2: Jennifer Petrie: Petrarch solitarius 3: Zygmunt G. Baranski: The Ethics of Ignorance: Petrarch's Epicurus and Averroes and the Structures of the De Sui Ipsius et Aliorum Ignorantia 4: Jonathan Usher: Petrarch's Second Death III: PETRARCH IN DIALOGUE 5: Francesca Galligan: Poets and Heroes in Petrarch's Africa: Classical and Medieval Sources 6: Enrico Santangelo: Petrarch reading Dante: the Ascent of Mont Ventoux 7: John (...) Took: Petrarch and Cino da Pistoia: A Moment in the Pre-history of the Canzoniere IV: PETRARCHISM AND ANTIPETRARCHISM IN ITALY 8: Abigail Brundin: Petrarch and the Italian Reformation 9: Hilary Gatti: Petrarch, Sidney, Bruno 10: Diego Zancani: Renaissance Misogyny and the Rejection of Petrarch 11: Letizia Panizza: Impersonations of Laura in Sixteenth and Seventeenth Century Italy V: PETRARCHISM: ENGLISH AND SCOTTISH CONNECTIONS 12: Michael Wyatt: Other Petrarchs in Early Modern England 13: Stephen Clucas: Thomas Watson's Hekatompathia and European Petrarchism 14: John Roe: The Comedy of Astrophil: Petrarchan Motifs in Sidney's Astrophil and Stella 15: Syrithe Pugh: Sidney, Spenser and Political Petrarchism 16: R. D. S. Jack: Petrarch and the Scottish Renaissance Sonnet VI: PETRARCH AND THE MODERNS: ITALY AND BRITAIN 17: Pamela Williams: Leopardi and Petrarch 18: Ela Tandello: Between Tradition and Transgression: Amelia Rosselli's Petrarch 19: Martin McLaughlin: Nineteenth-century British Biographies of Petrarch 20: Peter Hainsworth: Translating Petrarch. (shrink)

Research Articles Thomas G. West, Social Philosophy and Policy, FirstView Article.

The tragedies of the past decade have led to an identity crisis among humanitarians. Respecting traditional principles of neutrality and impartiality and operating procedures based on consent has created as many problems as it has solved.

We show that certain classes of modules have universal models with respect to pure embeddings: Let R be a ring, T a first‐order theory with an infinite model extending the theory of R‐modules and (where ⩽pp stands for “pure submodule”). Assume has the joint embedding and amalgamation properties. If or, then has a universal model of cardinality λ. As a special case, we get a recent result of Shelah [28, 1.2] concerning the existence of universal reduced torsion‐free abelian groups with (...) respect to pure embeddings.We begin the study of limit models for classes of R‐modules with joint embedding and amalgamation. We show that limit models with chains of long cofinality are pure‐injective and we characterize limit models with chains of countable cofinality. This can be used to answer [18, Question 4.25].As this paper is aimed at model theorists and algebraists an effort was made to provide the background for both. (shrink)

A literal translation, allowing the simplicity and vigor of the Greek diction to shine through.

If the Libyan intervention goes well, it will put teeth in the fledgling RtoP doctrine. Yet, if it goes badly, critics will redouble their opposition, and future decisions will be made more difficult. Libya suggests that we can say no more Holocausts, Cambodias, and Rwandas--and occasionally mean it.

Quine takes physics to be the ultimate arbiter of what there is. [AL 1/29/2004].

Why and how have supply chain codes of conduct diffused among lead firms around the globe? Prior research has drawn on both institutional and stakeholder theories to explain the adoption of codes, but no study has modeled adoption as a temporally dynamic process of diffusion. We propose that the drivers of adoption shift over time, from exclusively nonmarket to eventually market-based mechanisms as well. In an analysis of an original data set of more than 1,800 firms between the years 2006 (...) and 2015, we find that strong nonmarket labor institutions in a firm’s home country are critical to initiating and sustaining the diffusion process. Market mechanisms, such as investor scrutiny and brand risk, emerge as important later. Contrary to prior research, we did not find a significant effect from nongovernmental organization (NGO) pressure. We conclude that markets for corporate social responsibility can and do arise, but only after they are effectuated by nonmarket institutions. (shrink)

Global Governance Futures addresses the crucial importance of thinking through the future of global governance arrangements. It considers the prospects for the governance of world order approaching the middle of the twenty-first century by exploring today's most pressing and enduring health, social, ecological, economic, and political challenges. Each of the expert contributors considers the drivers of continuity and change within systems of governance and how actors, agents, mechanisms, and resources are and could be mobilized. The aim is not merely to (...) understand state, intergovernmental, and non-state actors. It is also to draw attention to those underappreciated aspects of global governance that push understanding beyond strictures of traditional conceptualizations, and that offer better insights into the future of world order. Three sections enable readers to appreciate better the sum of forces likely to shape world order in the near and not-so-near future: "Planetary," changes wrought by continuing human domination of the Earth and by war; current and future geopolitical, civilizational, and regional contestations; and life in and between urban and non-urban environments. "Divides," including threats to human rights gains; the plight of migrants; those who have and those who do not; persistent racial, gender, religious, and sexual-orientation-based discrimination; and those who govern and those who are governed. "Challenges," of food and health insecurities; ongoing environmental degradation and species loss; the current and future politics of international assistance and data; and the wrong turns taken in the control of illicit drugs and crime. Designed to engage advanced undergraduate and graduate students in international relations, organization, law, and political economy as well as the general reader, this book invites readers to adopt both a backward- and forward-looking view of global governance. It will spark discussion and debate as to how dystopic futures might be avoided and change agents mobilized. (shrink)

The authors argue that, while all historical situations are in some sense unique, Sudan is not so idiosyncratic that the lessons and the precedents cannot be replicated elsewhere to protect civilians caught between warring sides in civil wars.

Weiss examines the moral choices that accompanied the military, humanitarian, and diplomatic dilemmas of the conflict in the former Yugoslavia and offers prescriptions for reconciling moral imperatives with political and operational constraints.

Among the national scientific groups, it was the Prague Linguistic Circle that had the most decisive affinity to the work of the Moscow-Tartu school. This paper examines the work of one of the most tireless contemporary Czech interpreters of the Lutman school, Vladimir Macura (1945-1999), whose work on Czech literary and historical texts are outstanding examples of the reverberation of Lotmanian semiotics of culture in the Czech Republic. This is particularly the case in Macura's reevaluations of the texts of the (...) Czech National Revival of the late eighteenth and early nineteenth centuries, especially in two books, Znamení zrodu (Signs of Birth) (1995) and Český sen (The Czech Dream) (1998). In these works Macura looked at this critical period in Czech national history as a multi-layered semiotic text in both the verbal and visual spheres. The present paper is an attempt at an exploration of Macura's treatment in this manner of the following: the Czech language, the city of Prague, the question of Czech national self-identification in general and as part of a larger category, the world of the Slavs. An important aspect of this project is an examination of Macura's exploration of the value functions of symbolic animals and plants in Czech Revival culture, and its relation to the axiology of Czech (Slavic) cultural identity. The paper is dedicated to Macura's memory. (shrink)