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.     

Historical Archaeology of Lavras do Abade: An Environmental Conflict in Nineteenth-Century Brazil

The Lavras do Abade research is a historical archaeological study about a gold mining village in midwestern Brazil that was destroyed by an environmental conflict at the end of the nineteenth century. This article concerns the history and archaeology of Lavras do Abade and consists of a post-disciplinary intersection of documentary and material sources about the site. In addition, only this type of reconstruction of a long-term event permits the scientific analysis of all the possible causes and consequences of this ecological contention. In this way, historical archaeology can be used to transpose a simple narrow view of the reconstruction of the past and offer insights into understanding similar unrest and group conflict today and in the future.     

Focusing on Chinese nationalism: an inherently flawed perspective? A reply to Allen Carlson

My article replies to Allen Carlson's critique of the existing literature on Chinese nationalism (Carlson's article was published in Volume 15, issue 1 of Nations and Nationalism, 2009). I address Carlson's criticisms and proceed to evaluate his proposal to move away from an allegedly unhelpful focus on nationalism towards the allegedly more illuminating framework of national identity construction. My approach to the existing literature on Chinese nationalism acknowledges efforts made within it at grappling with issues of theory and definition and builds on this acknowledgement to operate a selective appraisal of its strengths and weaknesses. I argue that while some of the problems identified by Carlson do indeed plague the literature, his advocacy of abandoning nationalism as a focus of research is unwarranted. There is continuing validity in using nationalism as a lens for understanding how China sees its place in the world.     

Characterization of timber masonry walls with dynamic tests

Timber-framed wall buildings are seen all over Europe, especially in seismic regions, given its adequacy to resist earthquakes. The “Pombalino” buildings, developed after the great 1755 earthquake that destroyed Lisbon, constitute one of the best examples of historic seismic-resistant structures based on timber-framed masonry walls. The research presented in this article aimed at experimentally evaluating the seismic behavior of the “Pombalino” buildings. The experimental program was based on extensive dynamic testing on sub-structures of typical “Frontal” walls (the timber masonry walls), carried out at the LNEC (the Portuguese National Laboratory of Civil Engineering) shaking table. The tests comprised (a) seismic tests, in which the seismic action was applied with increasing amplitude in one direction; and (b) dynamic identification tests, aiming at evaluating the dynamic properties of the sub-structures and their evolution with damage accumulation.     

Biostratigraphic Evidence Relating to the Age‐Old Question of Hannibal's Invasion of Italy,II: Chemical Biomarkers and Microbial Signatures

As discussed in Part I, a large accumulation of mammalian faeces at the mire site in the upper Guil Valley near Mt. Viso, dated to 2168 cal ¹⁴C yr., provides the first evidence of the passage of substantial but indeterminate numbers of mammals within the time frame of the Punic invasion of Italia. Specialized organic biomarkers bound up in a highly convoluted and bioturbated bed constitute an unusual anomaly in a histosol comprised of fibric and hemist horizons that are usually expected to display horizontal bedding. The presence of deoxycholic acid and ethylcoprostanol derived from faecal matter, coupled with high relative numbers of Clostridia 16S rRNA genes, suggests a substantial accumulation of mammalian faeces at the site over 2000 years ago. The results reported here constitute the first chemical and biological evidence of the passage of large numbers of mammals, possibly indicating the route of the Hannibalic army at this time. Combined with the geological analysis reported in Part I, these data provide a background supporting the need for further historical archaeological exploration in this area.