Masonry Italian Code-Conforming Buildings. Part 2: Nonlinear Modelling and Time-History Analysis

ABSTRACT

The unreinforced masonry (URM) buildings designed to be conforming with the Italian building code, as illustrated in the companion paper, were analyzed by performing time-history analyses on models realized using an equivalent frame approach and by adopting two different constitutive laws. Both the effect of record-to-record variability and of epistemic and aleatory uncertainties in modelling were explored. The achieved results constitute the basis for the evaluation of the risk level implicit in Italian code-conforming buildings. Two main performance conditions are considered, namely usability-preventing damage and global collapse limit states.     

Elite migrations in modern Italy: patterns of settlement,integration and identity negotiation

Abstract

Francesco Crispi has often appeared a paradoxical figure. In the earlier part of his life he was a revolutionary republican and a friend of Mazzini. After 1860 he accepted the monarchy, but remained very much a man of the Left and in many ways a quintessential democrat. Yet he ended his career as an authoritarian Prime Minister, a vigorous opponent of the Far Left, and an imperialist, who prorogued parliament and contemplated dispensing with representative government altogether. This article contends that Crispi's career has more coherence than is commonly suggested; it focuses on an important but hitherto neglected aspect of his thinking, namely the problem of how to achieve a sense of national consciousness in Italy through ‘political education’. The article traces the development of the idea of national political education throughout Crispi's career and argues that his two terms as Prime Minister in 1887–91 and 1893–6 can only be fully understood in the context of his long‐standing concern with this problem.     

The International Monetary Fund and its New Economics

This article focuses on a key element of the IMF's agenda for change: the repackaging of its economics of crisis around inflation targeting. It examines how this new policy regime redefines the political economy of the IMF's policy advice, and contextualizes it by focusing on Eastern Europe, the region worst affected by the global financial crisis which began in 2007. The article compares the conditionalities designed under the new and old policy regimes and argues that the mainstreaming of inflation targeting reproduces the IMF's function within a neoliberal political economy. It shows how, depending on the role of the IMF in the policy process, the models that inform policy are employed differently. During ‘normal’ times, models engender a contractionary bias that favours speculative capital. When acting as ‘lender of last resort’, the IMF retains the traditional emphasis on fiscal contractions, paying only lip service to its new economics of crisis while further ignoring crucial questions of macroeconomic policy coordination or the destabilizing potential of short‐term capital inflows.     

A parasitological paradox: Why is ascarid infection so rare in the prehistoric Americas?

Ascaris lumbricoides (giant roundworm) and Trichuris trichiura (whipworm) are the most common intestinal parasites found in humans worldwide today and they almost always co-occur. However, we find two distinct patterns in archaeological material. In historical North American and Old World contexts, the association of A. lumbricoides and T. trichiura is similar to the modern epidemiological picture. In contrast, the co-occurrence of A. lumbricoides and T. trichiura eggs in prehistoric South America is rare. For prehistoric contexts, T. trichiura is the most common parasite found in archaeological material. Recently molecular biology techniques pointed to a subdiagnosis of roundworm infection in pre-Columbian South American populations. This is contrary to the modern epidemiological picture in which A. lumbricoides infection is predominant. This is a paradox, especially when one considers the number of eggs laid by female daily, 200,000 and 20,000 thousand per day, for A. lumbricoides and T. trichiura respectively. By reviewing the records of these parasites, this paradox is presented and explanations for the paradox are explored. Taphonomy, prehistoric behavior patterns and medicinal plant use seem to be most relevant to the explanation of the paradox. Nematophagous fungi is a less likely factor creating the near absence of A. lumbricoides eggs in the prehistoric New World.     

Designs for Detecting Spatial Dependence

The aim of this article is to find optimal or nearly optimal designs for experiments to detect spatial dependence that might be in the data. The questions to be answered are: how to optimally select predictor values to detect the spatial structure (if it is existent) and how to avoid to spuriously detect spatial dependence if there is no such structure. The starting point of this analysis involves two different linear regression models: (1) an ordinary linear regression model with i.i.d. error terms—the nonspatial case and (2) a regression model with a spatially autocorrelated error term, a so-called simultaneous spatial autoregressive error model. The procedure can be divided into two main parts: The first is use of an exchange algorithm to find the optimal design for the respective data collection process; for its evaluation an artificial data set was generated and used. The second is estimation of the parameters of the regression model and calculation of Moran's I , which is used as an indicator for spatial dependence in the data set. The method is illustrated by applying it to a well-known case study in spatial analysis.