Modelling and Seismic Response Analysis of Italian Code-Conforming Base-Isolated Buildings

ABSTRACT

This paper reports on results of nonlinear analyses performed within the RINTC project on an RC building isolated with different systems (High Damping Rubber Bearings, High Damping Rubber Bearings and Flat Sliding Bearings, Friction Pendulum System) and designed according to the Italian design code. The seismic response has been evaluated under different seismic input levels of two sites with different hazard and by considering two Limit States: Global Collapse and Usability-Preventing Damage. The influence of seismic stoppers and modelling uncertainties is also evaluated. Results permit to compute the implicit collapse risk and to identify critical aspects of current design procedures.     

Eavesdropper on the Past: John W. Burrow (1935–2009), Intellectual History and Its Future

Summary

Focused on the much-debated historiographical and academic status of intellectual history, this article addresses for the first time and in detail the methodological views of the British historian John Wyon Burrow (1935–2009). Making use both of his published works and of unpublished material left to the University of Sussex Library (including lectures, letters, academic projects and biographical sketches), its goal is to provide a thorough account of an original and eclectic intellectual historian and, at the same time, cast new light on the role of the discipline in the scholarly context of the last few decades in Europe and the US. More specifically, the following pages will illustrate Burrow's work and career, with particular attention being paid to his insistence on narrative, imagination, irony and style; present his writings as an original instance of the anti-methodological practice of intellectual history; and study his opinions of what it means to carry out the métier d'historien. Finally, by examining Burrow's idea of the intellectual historian as a creative ‘eavesdropper’ on the ‘conversations of the past’ and as a ‘translator’ of past dialogues, this article will both pose some central questions and advance some proposals concerning the future of intellectual history.     

ELEMENTS OF SKILL: TRAITS,INTELLIGENCES, EDUCATION,AND AGGLOMERATION*

ABSTRACT There are many fundamental issues in regional and urban economics that hinge on worker skills. This paper builds on psychological approaches to learning to characterize the role of education and agglomeration in the skill development process. While the standard approach of equating skill to worker education can be useful, there are important aspects of skill that are missed. Using a measure of skill derived from hedonic attribution, the paper explores the geographic distribution of worker traits, intelligences, and skills and considers the roles of urbanization and education in the skill development process.     

Paleodiet in northern Chile through the Holocene: extremely heavy δN values in dental calculus suggest a guano-derived signature?

Dental calculus extracted from the teeth of 28 prehistoric human skeletons from coastal and valley archaeological sites in northern Chile that date from the Archaic period (∼2300 BC) to the Late Intermediate period (AD 1476) was analyzed for stable isotope (δ¹⁵N, δ¹³C) compositions. δ¹⁵N compositions were extremely heavy (+17.8 to +33.1‰), but comparable to some studies using conventional human biomaterials (hair, nail, muscle) at other prehistoric sites in northern Chile. There was a negative correlation between δ¹⁵N and δ¹³C for coastal sites, but a positive correlation for valley sites. Results for the valley sites point to a diet that was influenced by marine resources throughout all time periods. The unusually heavy δ¹⁵N values for the coastal sites require a dietary component with a δ¹⁵N composition significantly heavier than that of marine resources. The hyper-aridity at the study area (mean annual rainfall of 0.5–0.6 mm/year) is a likely contributing factor to the production of heavy δ¹⁵N values, but is unlikely to account for the heaviest δ¹⁵N values (>+30‰). One possible explanation for the heaviest δ¹⁵N values is that dietary components were impacted by isotopically-heavy guano, which is abundant in the region. Guano may have been used as a fertilizer during crop cultivation at the onset of the Formative period, continuing through the Historic period after Spanish contact. The indirect impact of guano from abundant bird habitats in the region may have influenced wild foodstuffs harvested throughout the pre-agricultural period. Results provide support for the utility of dental calculus as a proxy for obtaining stable carbon and nitrogen isotope signatures for use in paleodietary studies.     

Identification of psychoactive alkaloids in ancient Andean human hair by gas chromatography/mass spectrometry

Various ethnographic sources have demonstrated the symbolic and ritualistic importance of psychoactive plants in Native American societies. The social milieu of these mind- altering plants appears to be ancient. Archaeological evidence during the Tiwanaku empire expansion along the Atacama Desert of Chile, circa 500–1000 A.D., shows the presence of highly decorated snuffing tablets and tubes as grave goods. The preservation of mummified human bodies in the Azapa Valley, northern Chile, provided an opportunity to test the exact nature of the psychoactive plants used in this region. Using gas chromatography/mass spectrometry (GC–MS), here we show that ancient Andean populations from northern Chile consumed Banisteriopsis, a vine that contains harmine. This is the first direct archaeological evidence of hallucinogenic and medicinal ethnographic practices. Interestingly enough, this rainforest plant does not grow along the Atacama coast, thus our findings suggest extensive plant trade networks in antiquity as far as the Amazon.     

Subjectification in Times of Indebtedness and Neoliberal/Austerity Urbanism

How can we analyse the (re)emergence of squatting in relation to the current housing crisis in Italy? Centred on the case of Rome, the paper theorizes this return as resulting from processes of subjectification in the housing sector linked to the raising of indebtedness as a main dispositif of capitalism under neoliberal/austerity urbanism agendas. The political economy‐oriented literature on neoliberal/austerity urbanism is bridged with the post‐Marxist approach of Maurizio Lazzarato. Debt is seen as the archetype of social relations, shaping and controlling subjectivities, making the “work on yourself” essential to the reproduction of (indebted) society. However, given the circular nature of power, indebtedness can be generative of new processes of subjectification aimed at subverting the same power relation. In this sense, the paper operationalizes the conceptualization of Foucauldian subjectification recently proposed by Judith Revel, emphasizing how subjectification always results from (1) an action/gesture and (2) a consequent deconstruction of the identity.     

WHAT TYPE OF HISTORIAN? CONCEPTUAL HISTORY AND THE HISTORY OF CONCEPTS: A COMPLEX LEGACY AND A RECENT CONTRIBUTION

Javier Fernández Sebastián's edited collections of essays, Political Concepts and Time, is both a critical homage to the monumental work of Reinhart Koselleck (1923–2006) and an important contribution to the methodology of history‐writing. Centered on the polysemic nature of concepts, which are read as “‘vehicles for thought’” studied in their pragmatic and communicative applications in society, Political Concepts and Time provides a stimulating analysis of the role, weight, and future of conceptual history. Its thirteen essays offer an account of problems, questions, and debates on the interplay of words and concepts, meaning and historical change, context and discourse. They endeavor to clarify the complicated and perennially unresolved relationship between theory and practice. In order to do so, Fernández Sebastián has assembled a scholarly composite and broadly international group of specialists from a variety of disciplines and research fields. With the intellectual legacy of Koselleck's Begriffsgeschichte looming large, this book rethinks the ways in which not just historians but also social scientists and philosophers study the past as the expression of contingent, ever‐changing, and revocable semantic units shaping the culturally plural worlds we inhabit. Informed by the idea that history is porous, Political Concepts and Time also deals with the perhaps obvious but no less challenging issue of our approach to time as everyday experience and through its representation(s). Together with exploring the volume's specific historical topics, this essay will highlight some of its limitations and, above all, will respond to its criticism of intellectual history. The following pages will thus argue the case for the latter methodological perspective by reflecting on the type of historian it delineates. Claiming that in their investigation of past meanings intellectual historians make use of creative imagination, the essay will suggest that this model of history‐writing leads to a better understanding of multiple sources and that it might ultimately help overcome some of the inconsistencies and often simplistic divisions between various branches of the historiographical tree. In particular, a small proposal to reconcile conceptual and intellectual history will be advanced.     

Post-Tensioned Glulam Beam-Column Joints with Advanced Damping Systems: Testing and Numerical Analysis

This article describes tests investigating a feasible source of passive damping for post-tensioned glue-laminated (glulam) timber structures. This innovative structural system adapts precast concrete PRESSS technology [Priestley et al., 1999] to engineered wood products combining the use of post-tensioned tendons with large timber members. Current testing is aimed at further improvement of the system through additional energy dissipation. Testing has favorably compared glue-laminated timber (not previously implemented in this way) with laminated veneer lumber (LVL) used in New Zealand. After initial benchmark testing with post-tensioning only, a simple, minimally invasive and replaceable type of hysteretic damper was added.     

Transjordan During the Nineteenth Century: Reconsidering the Relation Between Arab Tribes and Christian Religious Communities

The article aims to reconsider the history of Ottoman Transjordan during the second half of the nineteenth century. Istanbul's decision to impose its direct control over this province triggered a process of evolution and change within local political spaces. The traditional balance of power was altered and tribes were forced to accept the authority of the Ottoman Empire. States and tribes were not the only political actors. Christian religious institutions also participated in the dynamics of change. The article reconsiders the history of a Christian village of Transjordan, Madaba, to describe the complex relationship between tribes and Christian religious communities during this period of change and evolution. The section Karak highlights the main aspects that characterized the refoundation of Madaba. In the section The Exodus and the Rebirth of Madaba, the exodus of several Christian tribes from Karak to Madaba is analyzed to explain the overlap and intertwinement between the different cultural horizons and sociopolitical logics of the two actors. The section The Village of Madaba analyzes some episodes of daily life in Madaba to detail the consequences of the interaction between tribes and religious communities. Finally, the functioning of the local sociopolitical space on which the Hashemite emirate was later founded is explained. The religious community‐tribe dyad was, in fact, part of the transition from “the tribe to the state.”