The fractal geometry of ancient Maya settlement

Ancient Maya settlement patterns exhibit fractal geometry both within communities and across regions. Fractals are self-similar sets of fractional dimension. In this paper, we show how Maya settlement patterns are logically and statistically self-similar. We demonstrate how to measure the fractal dimensions (or Hausdorff–Besicovitch dimensions) of several data sets. We describe nonlinear dynamical processes, such as chaotic and self-organized critical systems, that generate fractal patterns. As an illustration, we show that the fractal dimensions calculated for some Maya settlement patterns are similar to those produced by warfare, supporting recent claims that warfare is a significant factor in Maya settlement patterning.     

Do municipal unions improve cost efficiency for the social function? A quasi-experimental endogenous stochastic frontier approach

Homogeneous national policies can generate heterogeneous effects on the territory. This paper aims to verify the impact of the entry of single Italian municipalities into an inter-municipal association on the unitary costs of the social services supplied to the local communities. Panel cost stochastic frontier model in the presence of endogeneity has been introduced based on two pillars: a counterfactual setting to verify the aggregation effects concerning a set of similar municipalities and the use of a cost efficiency estimation methodology which considers the endogeneity of output with respect to cost. The results of our analysis show that the effects of adopting associated forms of service delivery can be very multifaceted and diversified according to the typology and the degree of implementation of the Municipal Union itself. The analysis sheds light on the effects of municipalities' organisational choices, addressing the consolidation of small municipalities not in binary terms but also—and above all—suggesting that it is the type of union that impacts the possibility of convergence towards greater cost efficiency.     

Molecular and morphological analyses of avian eggshell excavated from a late thirteenth century earth oven

Using ancient DNA (aDNA) extracted from eggshell of the extinct moa (Aves: Dinornithiformes) we determined the species composition and number of eggs found in a late thirteenth century earth oven feature at Wairau Bar (South Island, New Zealand) – one of New Zealand’s most significant archaeological sites. Mitochondrial and nuclear DNA signatures confirmed this oven feature contained fragments of at least 31 moa eggs, representing three moa genera: Emeus; Euryapteryx; Dinornis. We demonstrate through the genetic identification of 127 moa eggshell fragments that thickness is an unreliable character for species assignment. We also present a protocol for assessing the preservation likelihood of DNA in burnt eggshell. This is useful because eggshell fragments found in archaeological contexts have often been thermally modified, and heat significantly increases DNA fragmentation. Eggshell is widely used in radiocarbon dating and stable isotope research, this study showcases how aDNA can also add to our knowledge of eggshell in both archaeological and palaeoecological contexts.     

Numerical Fragility Analysis of Vertical-Pile-Supported Wharves in the Western United States

This study develops seismic fragility curves for vertical-pile-supported wharves commonly found in the western United States. Nonlinear time-history analyses of a two-dimensional numerical model under two ground motion suites are performed. The results show that the jumbo container cranes increase by 10.8% in the wharf deck drift. By using the experiment-based limit states, the proposed fragility curves demonstrate that, at a PGA of 0.50 g, the probabilities of exceeding slight, moderate, extensive, and complete limit states are approximately 23.0%, 7.0%, 4.0%, and 3.0%, respectively, while at a PGA of 1.00 g, the exceeding probabilities increase to 44.0%, 19.0%, 14.0%, and 11.0%, respectively.     

The union Européenne des fédéralistes and its ‘third force’ programme

Environmental Education (EE) is broadly discussed in the Federal Republic of Germany. The different conceptions may be classified as the cognitive, the emotive, the cognitive-experiential and the system-critical model. In the article, the role of institutions in the educational system, dealing with EE, is described. Current activities in empirical research work and some findings on EE in German schools are reported.     

From aisling to chora: female allegories of the nation in contemporary Irish women's poetry

Contemporary Irish women poets use female tropes of Irish nationalism as a potent site for revising traditional conceptions of femininity, maternity, and cultural identity. Arguably, female tropes of aisling poetry inhabit the same cultural location that anchors the societal role of motherhood as theorised by Julia Kristeva. Kristeva's work highlights mothers' important function in regulating the drives and preparing children for entrance into the symbolic order of society, in relation to which mothers remain structurally liminal. The Platonic chora, an amorphous receptacle from which forms emerge, symbolises this position at the threshold. This essay shows that Irish women poets revise female allegories of the nation either by aligning them with women's lived experience, as Eavan Boland has done, or by re-evaluating them from within their liminality, through stylistic experimentation or irony, which the analysis of poems by Eiléan Ní Chuilleanáin, Medbh McGuckian, Nuala Ní Dhomhnaill and Rita Ann Higgins demonstrates.