Faeces deposition on Amazonian Anthrosols as assessed from 5β-stanols

In the Amazon Basin, within a landscape of infertile soils, fertile Anthrosols of pre-Columbian origin occur (Amazonian Dark Earths or terra preta de Índio). These soils are characterized by high amounts of charred organic matter (black carbon, biochar) and high nutrient stocks. Frequently, they were considered as sign for intensive landscape domestication by way of sedentary agriculture and as sign for large settlements in pre-Columbian Amazonia. Beyond the archaeological interest in Amazonian Dark Earths, they increasingly receive attention because it is assumed that they could serve as a model for sustainable agriculture in the humid tropics (terra preta nova). Both questions lack information about the pre-Columbian practices which were responsible for the genesis of Amazonian Dark Earths. It has often been hypothesized that deposition of faeces could have contributed to the high nutrient stocks in these soils, but no study has focussed on this question yet. We analyzed the biomarkers for faeces 5β-stanols as well as their precursors and their 5α-isomers in Amazonian Dark Earths and reference soils to investigate the input of faeces into Amazonian Dark Earths. Using Amazonian Dark Earths as example, we discuss the application of threshold values for specific stanols to evaluate faeces deposition in archaeological soils and demonstrate an alternative approach which is based on a comparison of the concentration patterns of 5β-stanols with the concentration patterns of their precursors and their 5α-isomers as well as with local backgrounds. The concentration patterns of sterols show that faeces were deposited on Amazonian Dark Earths.     

(Re)defining the Euroregion Concept

The INTERREG-A, the largest of the Community Initiatives, has been supporting the cross-border cooperation (CBC) in European Union (EU) territory, over the past 19 years, thus contributing to redraw a new political map of Europe, by reducing the barrier effect and reinforcing common development strategies. During this period, several new partnerships and institutions have been established, creating networks that connect a wider range of local and regional actors into the CBC process, on both sides of the borders. Some of these entities have gradually started to call themselves Euroregions, based on non-rigid criteria, even though, in some cases, they lack legal personality and operate on an informal basis. Moreover, it was recently approved by the European Commission the possibility to establish European Groupings of Territorial Cooperation, with legal personality, in border areas, to overcome the obstacles to the CBC process. Therefore, in this article, we propose a new CBC typology which looks at the concept of Euroregion in a geographical perspective, supported on different criteria and adapted to the present-day reality of the European border territories.     

Seismic Vulnerability of Building Contents for a Given Occupancy Due to Multiple Failure Modes

A methodology is presented for assessing the seismic vulnerability of inventories of contents to multiple failure modes. An ordering method to find out probabilities of failure of a conditional mode upon the survival of the other modes is applied. The procedure considers the statistical correlation of failure modes due to the dynamic response, such as sliding and/or overturning, of contents and also to non structural components. This methodology was applied to inventories of four types of occupancy (house, school, office, and hospital) located in Mexico City, considering that all contents are situated at ground level. Expected damage functions for these inventories show large differences between them, the house and school inventories being the least vulnerable, and the hospital inventory, the most vulnerable, even for low intensities.     

Re-evaluation of the fossil penguin Palaeeudyptes gunnari from the Eocene Leticia Formation,Argentina: additional material,systematics and palaeobiology

Acosta Hospitaleche, C. & Olivero, E., April 2016. Re-evaluation of the fossil penguin Palaeeudyptes gunnari from the Eocene Leticia Formation, Argentina: additional material, systematics and palaeobiology. Alcheringa 40, xx–xx. ISSN 0311-5518

Eocene penguins are known mostly from Antarctic specimens. A previously documented partial skeleton consisting of a pelvis, femur, tibiotarsus and fibula, from the middle Eocene Leticia Formation, Tierra del Fuego Province, Argentina, has been prepared and re-described. Re-analysis favours assignment to Palaeeudyptes gunnari, a species widely recorded in the Eocene of Antarctica. A new isolated coracoid belonging to an indeterminate species reveals new information about diving kinematics and swimming abilities. Palaeobiological attributes and morphology of the fossils indicate that both specimens belonged to large penguins with poor diving capability and wing propulsion systems similar to those of extant taxa. These penguin remains are the only vertebrate fossils thus far recorded from the Leticia Formation, and provide important insights into the relationships of South American and Antarctic penguins during the Paleogene. The presence of Palaeeudyptes in Argentina supports an Eocene connection between the South American and Antarctic penguin faunas.

Carolina Acosta Hospitaleche [acostacaro@fcnym.unlp.edu.ar], CONICET. División Paleontología Vertebrados, Museo de La Plata Paseo del Bosque s/n, 1900 La Plata, Facultad de Ciencias Naturales y Museo, UNLP, Argentina; Eduardo Olivero [emolivero@gmail.com], CONICET. Centro Austral de Investigaciones Científicas (CADIC-CONICET), B. Houssay 200, 9410 Ushuaia, Tierra del Fuego, Argentina.     

Assessment of Numerical and Experimental Errors in Hybrid Simulation of Framed Structural Systems through Collapse

Hybrid simulation can provide significant advantages for large-scale experimental investigations of the seismic response of structures through collapse, particularly when considering cost and safety of conventional shake table tests. Hybrid simulation, however, has its own challenges and special attention must be paid to mitigate potential numerical and experimental errors that can propagate throughout the simulation. Several case studies are presented here to gain insight into the factors influencing the accuracy and stability of hybrid simulation from the linear-elastic response range through collapse. The hybrid simulations were conducted on a four-story two-bay moment frame with various substructuring configurations. Importantly, the structural system examined here was previously tested on a shake table with the same loading sequence, allowing for direct evaluation of the hybrid simulation results. The sources of error examined include: (1) computational stability in numerical substructure; (2) setup and installation of the physical specimen representing the experimental substructure; and (3) the accuracy of the selected substructuring technique that handles the boundary conditions and continuous exchange of data between the subassemblies. Recommendations are made regarding the effective mitigation of the various sources of errors. It is shown that by controlling errors, hybrid simulation can provide reliable results for collapse simulation by comparison to shake table testing.     

Assessing Territorial Impacts of the EU Cohesion Policy: The Portuguese Case

This article examines the territorial impacts of the EU Cohesion Policy in Portugal, between 1990 and 2010, at the national level. To reach some conclusions, after a brief overview of the existing literature on territorial impact assessment (TIA) procedures, we present the main features of a proposed TIA technique, which we called TARGET_TIA, and applied to our study case. This analysis permitted us to go beyond the general scope of the EU Cohesion Policy evaluations, which concentrate mainly on the socioeconomic and environmental dimensions, by placing on evidence other key-territorial dimensions, such as Territorial Governance/Cooperation and Polycentricity. Findings indicate that, in general, the EU Cohesion Policy had positive territorial impacts in Portugal, namely by supporting the construction of absent and necessary physical infrastructures. However, the lack of spatial planning and strategic vision limited a more effective and efficient use of Cohesion Funds in Portugal.     

America in Speech and in Deed

The author's primary aim in what follows is to fully articulate Chantal Delsol's critique of late modern universalism as an attempt to depoliticize the individual for the sake of replacing politics with morality. The result of this depoliticization is a quasi-pantheistic cosmopolitanism that not only effectively denies the significance of individuality, despite rhetorically lionizing it, but also undercuts the freedom of individual conscience that makes moral choice possible. Genuine political prudence and moral judgment are subsequently replaced by the rigid exactitude of a technocratic analysis that reintroduces the "clandestine ideology" it was, despite protestations to the contrary, intended to eliminate. The unhappy paradox produced by the attempt to replace the necessary limitations of political judgment with the universality of a priori moral decree is that a new set of culturally and historically idiosyncratic political attachments are surreptitiously introduced beyond the pale of reasonable debate and disagreement. Delsol's measured response is not a precipitous rejection of universalism as such but a rehabilitation of it that recaptures the Christian moral realism at its core.     

A high-resolution electron microscopic and energy-dispersive spectroscopic study on the molecular mechanism underpinning the natural preservation of 2300 Y.O. naturally-mummified human remains and the occurrence of small-sized [Zn][Al]Carbon spheres

In this paper we use Scanning and Transmission Electron Microscopy, and Energy Dispersive Spectroscopy to characterize the surface of the skin of a 2300 YO, naturally-preserved mummy, belonging to a two-year and eight month girl (“Pepita”), found inside a cave located in Altamira, Querétaro, México (21°40′–20°01′; 99°03′–100°36′). The cave was found in Sierra Gorda, an orographic region with a relief of sedimentary origin from the Gulf of Mexico, composed by high mountains with altitude values surpassing 3000 m above sea level, with ample and steep canyons, and a prominent role on the exploitation and distribution of cinnabar (HgS). The skin showed the presence of small-sized spherules, containing Al (≤43%) in the most exposed region (5–10 μm depth). Thin layers and structural microdomains covered small and large spheres. Structures conformed by stacked, nano-sized particles located far-from-the bunches contained C (≤45%), Zn and Si (≤10%), and minor amounts of Ca (≤2.6%). By contrast, regions between spheres contained high amounts of Ca (≤23%) and Al (≤15%), but lacked Zn and Si. Carbon spheres showed two distinctive composition, a signature that their formation might have occurred in a least two different stages via concentric growth mechanisms, with the incorporation of Zn and Al at a later stage. [Zn][Al]Carbon spheres showed morphology and growth patterns that compared to those resulting from the hydrothermal carbonization by Fe²⁺ ions under mild conditions, suggesting a common mechanism of formation. Textural changes of thin films found between [Zn][Al]Carbon spheres were attributed to differences in viscosity, which might have contributed to increases in functionality and specific surface area (by means of decreases in size) and, in turn, facilitating the sequestration of biomolecules. We propose that the presence of [Zn][Al]Carbon spheres provides protection against bacterial and UV attack. The physical properties of these spheres helped entrap biomolecules. Taken together, these factors contributed to the preservation of Pepita.