Dynamical Assessment of the Work Conditions of Reinforcement Tie-Rods in Historical Masonry Structures

Tie-rods are essential structural elements, which have been employed for centuries in masonry historical buildings, either during the construction or in successive strengthening interventions, with the aim of containing dangerous horizontal actions. The actual work conditions of these tie-rods, which are strongly influenced by their load history, are difficult to be quantified theoretically, and an effective method for their measure is of great importance in order to ensure the efficiency of these elements during the time and the stability of the entire building. Common measurements are often carried out adopting models based upon significant simplifications, like, for example, hinges at the extremities. These assumptions, rarely represent the real work conditions for anchorages. In this work, a non-destructive testing method is presented, based upon sophisticated dynamical models that can take into consideration many of the circumstances neglected by the simplified models. Four case studies are extensively described, trying to embrace the most common situations in term of peculiar features of the building, structural configuration, and load history. The discussion of the results yields the safety margin of the rod with respect to the material failure and provides important indications about the overall stability of the whole building.     

Women helping women? Chain of command and gender discrimination at the workplace

ABSTRACT

We analyse the gender composition of the highest hierarchical levels within large Italian firms and we investigate whether it correlates to the working career of women in lower ranks of the same firm. We observe a disproportionate share of men hired and promoted, regardless of the top ranks’ gender composition. However, we detect a mitigating effect when the presence of women in higher managerial ranks increases promotions of women in lower ranks. This is consistent with the “women helping women hypothesis”. However, this mitigating effect is far from rebalancing career chances by gender. No significant differences emerge between firms in innovative and traditional sectors, despite the quite different narrative put in place by HR managers.     

Distinguishing between calcites formed by different mechanisms using infrared spectrometry: archaeological applications

Infrared spectrometry is a well-established method for the identification of minerals. Due to its simplicity and the short time required to obtain a result, it can be practiced on-site during excavation using portable infrared spectrometers. However, the identification of a mineral may not be sufficient. For example, a lime plaster floor and a crushed chalk surface have a similar appearance and are composed of the same mineral – calcite. Here we exploit differences in the infrared spectra of geogenic, biogenic and pyrogenic calcites for the identification of each calcite type. The infrared calcite spectrum has three characteristic peaks in the region of 400–4000 cm⁻¹, designated ν₂, ν₃, and ν₄. When a calcite sample is ground, as part of the measurement preparation procedure, some grinding dependent changes will be revealed in the infrared spectrum. With additional grinding, the ν₃ peak narrows and the heights of the ν₂ and ν₄ peaks decrease, when both are normalized to the ν₃ height. By plotting the normalized heights of the ν₂versus the ν₄ of several grindings of the same sample, a characteristic trend line is formed for each calcite type. The trend lines of geogenic calcites have the shallowest slopes and highest ν₄ values when compared to pyrogenic calcites, which can be further divided to ash and plaster/mortar samples. This method can assist in distinguishing between the various calcites, and provide insights into homogeneity and preservation state of the calcitic materials in question.     

Regional perspectives on Wari state influence in Cusco,Peru (c. AD 600–1000)

The archaeological reconstruction of ancient states requires consistent regional measures of state-directed power and influence. This paper presents data from a series of systematic archaeological surveys in the Cusco region of highland Peru to evaluate patterns of influence by the Wari state during a period of colonization from ca. AD 600–1000. We discuss interpretive debates over the nature and intensity of Wari social power, suggesting that site-based studies can be contextualized meaningfully using our large-scale dataset, which offers settlement patterns at varying distances (0–70 km) from Pikillacta, a Wari administrative center. We discuss local settlement patterns before and during Wari colonization, as well as the distribution of Wari pottery and local Wari-influenced wares. We then use a geographic information systems analysis of travel time from key sites to evaluate the broad regional distribution patterns of local and Wari ceramic styles. Although the regional survey data do not inform us reliably about all kinds of social power, we conclude that the Wari cultural, economic, and political influence over the Cusco region was limited and discontinuous—an example of colonization that resembles the practices of other early states.     

The fallen hero: masculinity,shame and farmer suicide in Australia

The drought-stricken Australian rural landscape, cultures of farming masculinity and an economy of value, moral worth and pride form a complex matrix of discourses that shape subjective dynamics that render suicide a possibility for distressed farmers. However, the centrality of a ‘mental health’ perspective and reified notions of ‘stoicism’ within this discursive field operate to exclude consideration of the ways in which cultural identity is linked to emotions. To illuminate and explore complex connections between subjectivity, moral worth and affect in relation to understanding farmer suicide, this article draws on theory and literature on agrarian discourses of masculine subjectivity and shame to analyze empirical data from interviews with farmers during times of environmental, social and economic crisis. The idealized notion of the farming man as ‘Aussie battler’ emerges from romantic agrarian mythology in which pride and self-worth are vested in traditional values of hard work, struggle and self-sacrifice. However, the structural context of agriculture, as it is shaped by the political economy of neoliberalism, threatens farm economic viability and is eroding the pride, self-worth and masculine identity of farmers. The article suggests that the notion of the ‘fallen hero’ captures a discursive shift of a masculinity ‘undone’, a regress from the powerful position of masculine subjectivity imbued with pride to one of shame that is of central importance to understanding how suicide emerges as a possibility for farmers.     

The genetic signature of a shrunken head

The making of ritual shrunken heads, or tsantsas, was a common practice among the Jivaro-Shuar tribes of Ecuador and Peru during the post-Columbian period. The raising interest in the tsantsas in the late nineteenth through the twentieth century caused an increase in manufacturing of forged shrunken heads for profit. In the current study, we examined the authenticity and possible cultural provenance of the shrunken head displayed at the “Eretz Israel Museum, Tel Aviv” using macro- and microscopic criteria together with DNA analyses. DNA analyses have revealed that the shrunken head represents a human male individual with a genetic profile compatible with an African ancestry and resembling that of modern South American populations.     

It all used to be better? Different generations on continuity and change in urban children's daily use of space

There is much speculation about children's changing space–time behaviour, yet little is actually known about it. The study reported on here, which was based on oral histories, statistical and archive research, and observations in Amsterdam, compared children's use of space during the 1950s and early 1960s with that of today. The public space of the street used to be a child space, but in two of the three streets studied it has been transformed into an adult space. Conversely, private home space—traditionally the domain of adults—has become a child space. Over time, children's geographies have become more diverse. In addition to the traditional childhood of outdoor children, we distinguish indoor children and children of the backseat generation. These two new types are characterized by a decrease in playing outdoors and an increase in adult supervision. Although this may be regarded as a loss, new children's activities have emerged, outdoors as well as indoors. Contemporary cities can be exciting places for children, but it is clear that inequality by class has become more manifest. Both new geographical childhoods have resulted in a decrease in children's agency, which may have a negative impact on segregation patterns.     

Middle-class childhood and parenting culture in high-rise Hong Kong: on scheduled lives,the school trap and a new urban idyll

This exploratory study seeks to understand childhood in Hong Kong in relation to the high-rise living environment and dominant parenting culture among middle-class professionals. The empirical results suggest that it is parenting culture rather than the built environment that creates children's busy, scheduled lives, high levels of adult supervision and limited outdoor play. Building on a strong portfolio is considered to be both necessary to enter the popular British educational system and to counterbalance a curriculum that is supposed to offer less structured learning compared to the local Cantonese schools. It is argued that this paradoxical situation must be understood in the context of parents' personal childhood histories and the highly competitive global labour market in Hong Kong. The paper ends with a reflection on new discourses of childhood that creates cities and its many consumption spaces as urban idylls for raising children.