TWENTY YEARS AFTER “ABSOLUTE CHRONOLOGY: ARCHAEOLOGICAL EUROPE 2500‐500 BC” NEW DATA ON ITALIAN PROTOHISTORY

The article is a tribute to the pioneering role of Klavs Randsborg in the early Nineties in search for a new comprehensive chronology for Italian and European prehistory based on a combination of dendrodates with C14 dates. The debate of the last 25 years on this matter is presented, demonstrating a scholarly split, in particular in Italy. At the same time, an Italian peculiarity, the presence of layers of volcanic eruptions mixed with archaeological deposits is proposed as a sort of meeting ground for opponents and proponents of absolute chronology and a way to pair it with known cultural phenomena.     

Effectiveness of FRCM Reinforcement Applied to Masonry Walls Subject to Axial Force and Out-Of-Plane Loads Evaluated by Experimental and Numerical Studies

ABSTRACT

An experimental campaign and a numerical analysis devoted to the investigation of the out-of-plane behavior of masonry walls reinforced with Fiber Reinforced Cementitious Matrix (FRCM) are presented here. The main goal of this study is to analyze and evaluate the effectiveness of the strengthening system, by discussing failure modes and capacity of strengthened masonry walls, in order to assess their behavior under out-of-plane horizontal actions, such as, for example, seismic actions. A purposely designed experimental set-up, able to separately and independently apply an axial force and out-of-plane horizontal actions on masonry walls, was used. Experimental results are discussed and compared with the outcomes of nonlinear analyses performed on simplified finite element models of the walls. A proper evaluation of the flexural capacity of FRCM strengthened walls is the first step of the ongoing process of drawing reliable code guidelines leading to a safe design of strengthened masonry structures.     

The dejuvenation of the Italian population

Abstract

In recent decades, a process of structural reduction of the weight of new generations in overall population (dejuvenation) has been observed. In Italy, this process started in the 1970s and accelerated in the 1990s. We present here its main consequences for Italian society and economy. The number of Italian young people (aged 0–29) was reduced from 24.5 million in 1951 (51.6% of the population) to 17.5 million in 2016 (28.8%). What is more, many young Italians are becoming a wasted resource and a social cost, facing high rates of unemployment, long economic dependence on the family of origin, renunciation of full achievement of their life plans, distrust of institutions, low social and political participation, and increasing emigration flow. We analyze, using multivariate models, the data of the Rapporto Giovani survey held by the Toniolo Institute in 2015. Our main finding is that generational disadvantages not only hamper economic growth but, in a familistic context, also exacerbate social inequalities.     

Experimental Identification of the Dynamic Characteristics of a Flexible Rocking Structure

This article presents the results of free vibration and earthquake excitation tests to investigate the dynamic behavior of freely rocking flexible structures with different geometric and vibration characteristics. The primary objective of these tests was to identify the complex interaction of elasticity and rocking and discuss its salient effects on the rocking and vibration mode frequencies, shapes and excitation mechanisms. The variability of response is discussed, including critical investigation of the repeatability of the tests. It was found that the variability in energy dissipation and energy transfer to vibrations at impact may lead to significantly different responses to almost identical excitations.     

The Museum for the History of the University of Pavia and the Birth of Histology

A brief overview is provided on the development of histology as an independent discipline at the University of Pavia, through documents and preparations preserved in the Museum for the History of the University. Studies on the organization of tissues and cells started blooming in the mid-1850s, when morphological observations were supported by significant technical advancements in microscopy and tissue preparation. The role of Albert Koelliker, the great father of European Histology in the second half of 19 th century, is also discussed. Koelliker had several contacts with Camillo Golgi and promoted the diffusion of Golgi's discoveries. The authors also underline the innovative role of Camillo Golgi in the histological approach to research and in the foundation of modern histology.     

Medieval phases of settlement at Benabbio castle,Apennine mountains,Italy: evidence from Ground Penetrating Radar survey

The lack of written sources for many of the medieval castles in the northern Apennines (Italy) makes it difficult to completely establish the most ancient historical phases of these settlements. The church of San Michele belongs to an abandoned fortified settlement of the Castle of Benabbio, in the mountains surrounding Lucca. Thanks to an epigraph still visible on the façade, the church foundation is dated back to AD 1218. However, several archaeological findings at the settlement seem to suggest stages of encastlement that are older than the church foundation.     

The Effect of Stiffened Floor and Roof Diaphragms on the Experimental Seismic Response of a Full-Scale Unreinforced Stone Masonry Building

An extensive experimental program was carried out at EUCENTRE, within a research project on the evaluation and reduction of the seismic vulnerability of stone masonry structures. The main part of the experimental program has been devoted to the shaking table tests on three full-scale, two-story, single-room prototype buildings made of undressed double-leaf stone masonry. The first building tested was representative of existing unreinforced stone masonry structures with flexible wooden diaphragms, without any specific anti-seismic design nor detailing. In the second and third buildings, strengthening interventions were simulated on structures theoretically identical to the first one, improving wall-to-floor and wall-to-roof connections and increasing diaphragm stiffness. In particular, in the third specimen, steel and r.c. ring beams were used to improve the diaphragm connection to the walls and collaborating r.c. slab and multi-layer plywood panels were used to stiffen floor and roof diaphragms, respectively. This article describes the strengthening interventions applied to the third building prototype and presents the experimental results obtained during the shaking table tests. The results obtained permitted the calibration of a macroelement model representative of the nonlinear behavior of the structure.     

Giuseppe Levi: mentor of three Nobel laureates

Giuseppe Levi (1872-1965), Professor of Anatomy at the University of Turin, had broad research interests and was a pioneer of in vitro studies on cultured cells. He provided a number of contributions on the nervous system, especially on the plasticity of sensory ganglion cells. An influential and magnetic teacher and mentor, he gathered around him a large group of brilliant students. He has the peculiar primate to count among his students three Nobel laureates in Physiology or Medicine: Salvador Luria, Renato Dulbecco, and Rita Levi-Montalcini. For all three of them, the internship in Levi's laboratory provided an exceptional initial stimulus. They remained in close contact with each other and with Levi even after the 1940s when they migrated to the United States for political and racial reasons, engaging in different fields of research. Rita Levi-Montalcini, who was awarded the Nobel Prize (1986) for the discovery of Nerve Growth Factor, was stimulated and assisted in her work by Giuseppe Levi during the difficult years of World War II. With Giuseppe Levi, she pursued early studies on the relationships between neural centers and their peripheral target of innervation, and she has witnessed in her writings the enthusiasm of her mentor.