In diffusion creep, the contribution of grain-boundary sliding to the overall strain o s can be evaluated in arbitrary polycrystals, if the angular distribution of grain boundaries is known. A o s value of 0.5 is obtained for two-dimensional equiaxed microstructures consisting of regular hexagonal grains, equiaxed grains grown from a Voronoi structure or grains having a circular distribution of grain-boundary angles. The o s value is also evaluated for uniaxially deformed 2D microstructures, both diffusionally and uniformly deformed. For the (...) former, the deformed microstructure is obtained by the simulation of microstructural evolution in polycrystals with straight grain boundaries. The o s value increases gradually with increasing or decreasing strain and is larger in the diffusionally deformed microstructures than in the uniformly deformed microstructures for a given grain aspect ratio. The o s value for three-dimensional polycrystalline microstructures is also obtained from an ellipsoidal distribution of grain-boundary angles. The resultant o s value is 0.60 for 3D equiaxed polycrystals and increases gradually with increasing strain. (shrink)

There has been a long debate on whether demonstratives are directly referential as Kaplan originally argued, or indirectly referential like a definite description. I propose a new analysis of demonstratives that combines intuitions from both direct and indirect approaches. The demonstrative is analyzed as an indirectly referential expression with a binary maximality operator that takes two arguments, where the second argument can be a deictic pointing, an anaphoric index, or a relative clause. Direct reference is encoded not in the meaning (...) of the demonstrative but in the meaning contributed by the pointing gesture, thus capturing both direct and indirect uses. I further propose that some pronouns in English function as demonstratives, realizing the binary structure and competing with the demonstrative. The main advantages of this proposal include (a) deriving the distribution of pronominal and adnominal demonstratives systematically; (b) capturing the unique interaction that demonstratives have with a pointing gesture; and (c) locating English demonstratives against a larger, cross-linguistic picture. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Creating the Conditions for Intergenerational Justice: Social Capital and ComplianceAdelin-Costin DumitruIntroductionSuppose philosophers succeeded in putting forward two equally desirable theories of intergenerational justice. Both of them fare extremely well in regard to either a case-implication critique or a prior-principle strategy of argumentation (with the former requiring us to check the implications of a principle in counterfactual cases, and the latter testing the compatibility of a principle with certain more (...) fundamental values, according to Sen [197]). How are we to decide between them? To the extent that we believe that one of the purposes of political philosophy is to issue achievable and desirable recommendations (Stemplowska 319) or to be action-guiding (Swift 363), we might compare the two by applying a feasibility criterion. Such a criterion indicates that a state of affairs could be realized “if we were to summon sufficient practical will and direct our (individual or collective) efforts in the right direction” (Gheaus 450). In our case, the decision is a relatively easy one: both theories pass a threshold of acceptability and thus we would be morally justified in attempting to bring them about. Furthermore, by stipulation, world A in which theory x were implemented would be equally desirable as world B, in which theory y were implemented. The only distinction would be one concerning their feasibility.Nonetheless, this scenario is usually not one that is available to us. If theories differ based on their desirability as well as their feasibility, how are we to choose? One option would be to choose that moral theory which best satisfies the criteria mentioned by Buchanan, of moral accessibility, feasibility, and accessibility (Justice, Legitimacy). However, feasibility entails not only a static conception of duties, but a dynamic one, in which we postulate that agents have “duties that do not focus merely on what can be done in given [End Page 20] circumstances, but also on how to change circumstances so that new things can be done” (Gilabert and Lawford-Smith 812). In the present article, I argue that taking the idea of dynamic duties seriously requires that we redirect our efforts and resources toward those actions that would maximize the probability of achieving a successful transition from a non-ideal to an ideal state of the world. The argument is that, in the specific context of intergenerational justice, we ought to pay more attention to the matter of social capital extant in a society, if we want to achieve the ends of an intergenerational theory of justice. The concept of social capital puts under the same umbrella distinct features of social life such as networks and civic engagement, the role of reciprocity and trust in building institutions, and the effects that informal rules and institutions have on formal ones (Ostrom and Ahn, “Social Science Perspective” 4). Intuitively, these aspects are relevant for an account of intergenerational justice. The particular way in which they are relevant will be detailed later in this article.The claim that I defend is that the higher the level of social capital in a community, the more probable it will be that individuals are willing to redistribute resources to future generations. The underlying assumption that holds throughout the article is that public justification is important in construing a defense of a conception of justice. I proceed as follows. In the first section, I present an account of social capital. In the second section, I present the literature connecting social capital to political philosophy. In the third section, I argue why developing social capital is a worthwhile goal to pursue if we want to achieve intergenerational justice. The fourth section presents a series of measures that can increase the level of social capital. The fifth section responds to a series of potential objections that could be raised and concludes the paper.The Many Faces of Social CapitalMuch of the intellectual history of the twentieth century was dedicated to institutions and their function in shaping the social, economic, cultural, and political order. In a comprehensive definition put forward by March and Olsen, institutions represent “routines, procedures, conventions, roles, strategies, organizational forms, technologies..., beliefs, paradigms, codes, cultures and knowledge that surround, support, elaborate, and... (shrink)