The geoarchaeology of Mycenaean chamber tombs

This study presents a revised methodology for the excavation and analysis of the stratigraphy in Mycenaean chamber tombs and other multi-use burials. For our excavation of chamber tombs at Ayia Sotira and Barnavos, Nemea, we followed a geoarchaeological approach to provide details about the process of backfilling and re-opening of the tombs and to identify the location, number, and slope of these re-openings.     

FRICTION DAMPED STEEL MOMENT-RESISTING FRAMES SUBJECTED TO LONG-DISTANCE EARTHQUAKES: INFLUENCE OF WELD FRACTURES

It has been generally accepted that steel moment-resisting frames behave in a ductile manner under seismic excitations. However, during the 1994 Northridge earthquake in California, weld fractures at the beam-to-column connections occurred in many steel buildings. Such brittle failures obviously precluded the traditional ductile-behaviour assumption and had a significant effect on the responses of steel moment-resisting frames. In this paper, the performance of a friction damping system for retrofitting steel moment-resisting frames was investigated under long-distance earthquakes. For this purpose, the 1985 Mexico City (SCT), the 1995 Bangkok, or the 1977 Romania ground motions, all scaled to a peak ground acceleration of 0.17 g, were considered in this study. Responses of the building under the 1940 El Centro N-S component were also included for comparison. The results of the study show that a friction damping system can reduce the seismic responses significantly. The devices can also prevent the total collapse and joint failures of the building equipped with friction dampers, while the one without dampers would collapse, even under a peak ground acceleration of only 0.17 g.     

Transforming Unjust Structures: A Philosophical and Theological Perspective

Abstract

This essay explores the difficult task of transforming unjust social structures (USS). It does so by an understanding of the moral features of interactions, drawing from Hannah Arendt's political philosophy and Paul Ricoeur's conception of institutions. Then a definition of what can be considered as USS is given and some of the characteristic features of these social phenomena specified. As a further step, this essay delves into a theological understanding of USS as structures of sin, for no rationale can be given for the most perverse USS (concentration camps/Gulag). Theology, through the notions of evil and sin, possesses some instruments to understand the absurd violence, the indifference and hopelessness of USS. The essay close with some remarks on how to deal with USS.     

The public relevance of the church and Catholicism in Italy

Abstract

This article highlights the particular situation of the Catholic religion in Italy which distinguishes itself for its systematic organization, active association-forming and cultural vitality, unrivalled in any other European country either Protestant or Catholic. On the one hand the church in Italy still disposes of such a wealth of clergy and religious figures, dioceses and parishes, educational and social institutions, ecclesiastical groups and associations, and so on, that it can maintain a diffuse presence scattered over the national territory; it deploys numerous forces and resources which form an integral part of normal social relationships that animate civil society. On the other hand, the church and Italian Catholicism today are particularly active at a cultural level, with their contribution of ideas and experience on vital questions arising in social coexistence (ranging from the family to bioethics, from religious freedom to the secular State, from national identity to the multiethnic presence, and so on).     

The role of the Italian Central Institute of Restoration in the field of underwater archaeology

In 1987, given the importance and complexity of the correct recovery and conservation procedures for underwater archaeological finds, an Underwater Archaeological Operations Unit was set up within the Italian Central Institute for Restoration. This Unit is made up of archaeologists, conservators, biologists and chemists, all of whom are underwater experts. It provides consultancy services and scientific and technical assistance for problems relating to the recovery, conservation, protection, and restoration of underwater archaeological heritage at the request of the Archaeological Superintendents. Great attention is paid to the professional training of underwater conservators. Specialized courses in the conservation of materials of underwater provenance are organized as part of its programme. This paper illustrates some of the main initiatives both in the restoration of archaeological objects and in training, in which the Institute has been involved, since the Underwater Unit was created.     

Functional specialization across space: a case study of the Canadian Electricity Industry, 1971–2001

This article examines the location of functions within the electricity sector in Canada from 1971 to 2001, using a centre‐periphery model. Power generation, distribution and retailing are generally carried out by multiestablishment crown corporations. Location patterns of different functions—management, scientific, production, etc.—are analyzed via the use of occupational groups. The spatial distribution of functions is found to be generally consistent with centre‐periphery relationships, with evidence of a growing functional specialization between large metropolitan and nonmetropolitan locations. However, differences emerge depending on power generation sources: fossil fuels, hydro, nuclear, solar or biomass. The choice of a power generation source has consequences for local economies.     

对推行农业循环经济问题的探讨

农业循环经济的主要内容是发展生态农业。生态农业我国古已有之,如珠江三角洲的“桑基鱼塘”,是农业人工生态系统,在解放前就已出现。实现农业现代化,要把生态农业规模扩大。当前要推行生态农业村、生态农业户,这是切实可行的措施,有现实性和可操作性。     

2. DESPITE SINGULARITY: THE EVENT AND ITS MANIFOLD STRUCTURES OF REPETITION

This article's principle interest is in the “structures of repetition” that characterize supposedly singular events. The starting point for the analysis is Reinhart Koselleck's discussion of the event in “Structures of Repetition in Language and History.” Koselleck perceived events as arising from metahistorical structures that characterize all human histories regardless of the eras in which they took place and are narrated. This article scrutinizes Koselleck's understanding of the event as well as the underlying “structures of repetition” shaping it. In considering the question of the temporality of the event, this article distinguishes three strata of repetitive structures. First, it examines a seemingly trivial historiographical structure of repetition of the event, which is the iterative proclamation of the return of the event. It then analyzes Koselleck's foundational, yet rarely truly appreciated, “Structures of Repetition in Language and History” and maps out the fundamental structures of repetition, which are the conditions of possibility of events. Finally, it hints at a further linguistic stratum of repetitive structures. In light of growing interest in Koselleck's work in both German and Anglophone historiography, this article systematizes the manifold structures of repetition against the backdrop of current explorations of the event's temporality, thus surveying a facet of Koselleck's pioneering work that is too often forgotten.     

Design and Analysis of Cross Vaults Along History

The history of cross vaults began almost 2,000 years ago with a widespread use during the Middle Ages and Renaissance, becoming nowadays one of the most diffused and fascinating structural typologies of the European building cultural heritage. However, conversely to the undeniable excellence achieved by the ancient masons, the structural behavior of these elements is still at the center of the scientific debate. In this regard, with the aim of reviewing the knowledge on this subject as a concise and valuable support for researchers involved in conservation of historical buildings, with a focus on design rules and structural analysis, the present study firstly introduces the cross vaults from a historical perspective, by describing the evolution of the main geometrical shapes together with basic practical rules used to size them. Then, the article deals with the subsequent advancements in structural analysis methods of vaults, until the development of modern limit analysis.     

Rapid Diagnosis of Crack Patterns of Masonry Buildings Subjected to Landslide-Induced Settlements by Using the Load Path Method

One of the main difficulties, when dealing with landslide structural vulnerability, is the diagnosis of the causes of the crack pattern. This is also due to the excessive complexity of models based on classical structural mechanics that makes them inappropriate especially when there is the necessity to perform a rapid vulnerability assessment at the territorial scale. This is why in this article a new approach for the rapid diagnosis of crack patterns of masonry buildings subjected to landslide-induced settlements is proposed. This approach is based on the Load Path Method, recently applied to the interpretation of the behavior of masonry buildings subjected to landslide-induced settlements.