Statistical Characterization of Structural Demand under Earthquake Loading. Part 1: Robust Estimation of the Central Value of the Data

This article is the first of two companion articles addressing the statistical characterization of seismic demand. Performance-based earthquake engineering methodologies often require the characterization of central value estimates of structural demand. Since outliers can occur in the data, central value estimates should be determined by robust estimation methods. The performance of 50 robust central value estimators is evaluated, for different sample sizes, using the chord rotation, curvature, shear force, and inter-story drift demands obtained after analyzing five reinforced concrete structures under real earthquake records scaled to several intensities. Based on the results, seven estimators are proposed for different sample sizes.     

On Equality

Locke builds a world that has benefits and costs. While economics has illustrated the benefits, this work illustrates the costs, by contrasting Two Treatises of Civil Government to the work of Aristotle. Generally, the cost one must bear from entering the world that Locke built is a compression of human experience, where qualitative equality of all things is asserted to exist. More importantly, a trivialization of all the outcomes, which emanate from all human decisions, must accompany the equality that Locke asserts. Even though Locke provides the elementary operating system for modern economics, through his proposition of the principle of qualitative equality, this operating system effectively divorces man, not only from nature but also from the very thing with which man has always used to interpret the natural world; works of great literature. While great literature has little patience for the trivial outcomes of human existence, except to highlight the importance of non-trivial outcomes, this work suggests that economics, under the influence of Locke, is permanently incapacitated from ever considering non-trivial outcomes.     

A microarchaeological approach for the study of pits

Abstract

The study of the technology underlying pre-industrial storage structures has an interest from an anthropological and archaeological perspective, in terms of the evolution of key cultural and cognitive capabilities, often related to the transition to food production.

Microarchaeological techniques offer a unique perspective on the study of pre-industrial storing technologies. In this work, examples are presented from two archaeological contexts in different climatic and socio-ecological situations during the Holocene in S Asia and SW Europe. Microarchaeological techniques used in this study include micromorphology, Fourier transform infrared spectroscopy and phytolith analyses. The comparative study of two pits highlights key aspects of the decision-making process involved in technological solutions of storage: ? The choice of a location for the construction of a given storage facility is highly affected by contextual climatic, microclimatic, soil and bioturbative factors

? The time taken to consume stored foodstuffs seems to affect technological investment as much as the intrinsic conservation requirements of the stored taxa

? The use of fire to hygienise pits implies that such structures were not conceived for single use

? Pre-industrial storage systems can be seen as modular structures, which components (e.g. topographical location, sediment type, lining type, hygienisation techniques and cover) can be recombined to improve storage performance for different climatic settings and foodstuffs.

     

Santa Maria di Collemaggio Church (L’Aquila,Italy): Historical Reconstruction by Non-Destructive Testing Techniques

The main goal of this work was the non-destructive testing (NDT) of an ancient fresco (15th century) preserved in the Santa Maria di Collemaggio Church (L’Aquila, Italy) and damaged after the 2009 earthquake. Active infrared thermography (IRT), near-infrared (NIR) reflectography and ultraviolet imaging (UV) were used. In addition, the state of the fresco prior to the earthquake was analyzed by electronic speckle pattern interferometry (ESPI), digital speckle correlation (DSC), raking light, tap, and chemical NDT techniques. The use of these techniques was important for the monitoring of new damages and for a comparison between the results over the years. Square heating thermography (SHT) data were processed using principal component thermography (PCT) and pulsed phase thermography (PPT) algorithms, in order to improve the defects’ signature and to reduce the impact of non-uniform heating and emissivity variations due to the painting’s pigments. A multi-analysis approach, segmentation operators and a specific data correlation method emphasize the overall study of the fresco. Furthermore, the facade and the high altar area were inspected by passive thermography and ground-penetrating radar (GPR), respectively. In the present case, the combined use of NDT techniques was useful to fill in the gaps in the construction history of the building.     

How network position interacts with the relation between creativity and innovation in clustered firms

Several previous studies have investigated different ways to stimulate creativity, since it enhances innovation. However, although creativity can be considered the main input of innovation, it is not enough by itself. In this paper, we study the effects of the cluster on the firm’s levels of creativity and innovation. How does the position of a firm in a cluster affect its outcome of innovation? Is it better to be in a central position or to be isolated? Based on the creativity, innovation and social network analysis literature, a conceptual model has been developed to explain the interaction between creativity and network centrality, and tested in the ceramic industrial cluster in Spain. Empirical findings support interaction effects between creativity and network centrality that moderate the results of innovation. The implication of these results in relation to creativity and innovation theory and practices are discussed.     

INTERNATIONAL AIR TRAVEL AND FDI FLOWS: EVIDENCE FROM BARCELONA

This paper provides a bridge between the literature examining the economic impact of air services and the literature analyzing the determinants of bilateral FDI flows. I estimate a gravity equation for the determinants of bilateral FDI flows between the Spanish region of Catalonia, home to the airport of Barcelona, and countries of all over the world for the period 2002–2015. I find evidence that the reduction in travel time due to the availability of nonstop flights scheduled with sufficient frequency increases the amount of FDI due to the enhanced transmission of information.     

First Evidence of Collective Human Inhumation from the Cardial Neolithic (Cova Bonica,Barcelona, NE Iberian Peninsula)

Excavations at Cova Bonica (Barcelona, Spain) have revealed 98 human remains, grouped into five age clusters and corresponding to a minimum of six non-articulated individuals. The remains are clearly associated with Cardial pottery, lithic artifacts, and ornaments suggesting an Early Neolithic horizon. The radiocarbon dating of three human individuals provides a reliable attribution to this period, with a range between ca. 5470 and 5220 cal b.c., identifying it as one of the few assemblages of human remains directly dated from this period. These remains correspond to a rare collective human inhumation and join a growing body of samples from the Cardial Neolithic, which is providing some of the important sites for the study of population movement and the spread of Neolithization along the western Mediterranean coast.