Characterization of a Historical Cannonball from the Fortress of San Juan De Ulúa Exposed to a Marine Environment

Metallurgical analyses and chemical characterizations were carried out on historical cannonballs from the Fortress of San Juan de Ulúa, Veracruz, México. Cannonballs dating from the 18th and 19th centuries share metallurgical characteristics similar to those of material coming from a shipment of ammunition found in the wreck of a sunken French ship from the battle of Trafalgar. The analyses show that the base material is grey cast iron with a carbon equivalent of 4.94 and a ferritic–perlitic matrix, in which the high phosphorus content has led to the formation of iron phosphide compounds in conjunction with a homogeneous distribution of carbon graphite flakes of Type C. In addition, corrosion products from samples revealed the presence of various crystalline iron compounds (X‐ray diffraction), mostly highly chlorinated iron compounds identified as akaganeite. X‐ray fluorescence identified various characteristics of the corrosion products as a function of the sampling depth. FT–IR spectroscopy revealed that the main difference between the corrosion products (internal and external) is determined by the number of organic species. Differential scanning calorimetry corroborated that these corrosion products are thermally stable compounds at elevated temperatures.     

A Box Containing Carpenter's Accessories from The Akko 1 Shipwreck,Israel: Archaeometallurgical Analysis of Surviving Ironwork

The Akko 1 shipwreck was an Egyptian armed vessel, built at the beginning of the 19th century. A wooden saw handle and a box containing iron nails and two split pins were discovered towards the stern. Given their function, location and context, these were part of the ship's carpenter's tools and accessories. A methodology was developed for conducting systematic metallurgical analysis in order to understand the manufacturing process of the surviving ironwork items, as well as to enlarge our knowledge regarding ironworking technologies during the early 19th century. Such methodology may assist in the future understanding of the technological evolution of similar wrought‐iron objects. The results demonstrated that the artefacts have a wrought‐iron heterogeneous microstructure and were manufactured by hot‐working prior to surface hardening by pack carburization.     

Whatever Happened to the Mother? A New Look at the Old Problem of the Mother's Brother in Three New Guinea Societies: Gimi,Daribi, and Iatmul

Kinship systems cannot be analysed as straightforward translations of the ‘facts of nature’ when those facts are limited to the production of a child by a heterosexual couple. Based upon analyses of three New Guinea societies (Gimi, Daribi, and Iatmul), I suggest that kinship systems take account – often by denying – certain ‘facts’ of human reproduction when those facts are extended beyond coitus and parturition to include both the very long period of infantile dependence upon one significant caregiver (always the mother in the societies in question and nearly universally) and the subsequent requirement for the child to be extracted from a dyadic maternal universe. Separation from mother is as critical to the survival and development of the individual as is the original prolonged and intense attachment to her. The question, then, is not whether indigenous peoples accurately understand coitus and conception – they do – but rather the ways in which they manipulate that knowledge in rules and rites of kinship in order to manage the growth and development of a child long after parturition. Rules of kinship and social relations neither ignore nor exist apart from theories of procreation as many anthropologists now claim. Rather, it is precisely because theories of procreation indicate and idealise the flow of bodily substance during coitus and pregnancy that they serve as organisational premises for social relations. The fact that kinship is a symbolic construction does not mean that it is wholly ideological nor, like a language, free to vary in ways that are arbitrary and unconnected to the ‘facts of life’ as Westerners understand them. Even when interlocutors openly deny such understanding and knowledge, especially of the male role in coitus and conception, evidence to the contrary is abundantly provided in myth, ritual, and indigenous theories of procreation. What kinship systems often do show, however, is a strategic denial of the role of the mother who, upon deeper understanding of indigenous concepts of procreation, turns out to be a ‘sterile vessel’ or without substantial contribution to her child. I illustrate this premise by extending earlier analyses of Gimi kinship and reexamining certain materials on neighbouring Daribi provided by Roy Wagner and on Iatmul peoples of the Sepik River as originally described in Naven by Gregory Bateson eighty years ago.     

LOCALIZATION AND INDUSTRY CLUSTERING ECONOMETRICS: AN ASSESSMENT OF GIBBS MODELS FOR SPATIAL POINT PROCESSES

The objective of this paper is to assess an approach to statistical modeling of point referenced establishment data that permit inclusion of “environmental” or establishment‐specific covariates and specific forms of interestablishment interaction. Gibbs models are used to decompose the conditional intensity of the spatial point process into trend and interaction components. The trend is composed of access measures (primarily different classes of roads) and three different interaction processes are tested: Geyer, area interaction, and Strauss hard core. While the models used have proved to be useful in ecology, we are unaware of any applications to establishment or firm data. In empirical application, the models yield intuitively appealing results for the trend component, and the ability to specify the interaction component gives deeper insights into interestablishment spatial dynamics than any previously published methods.     

COMMUTING TIME AND HOUSEHOLD RESPONSIBILITIES: EVIDENCE USING PROPENSITY SCORE MATCHING

We examine the relationship between individual commuting behavior and household responsibilities, with a focus on gender differences in that relationship. Using the Dutch Time Use Survey for the years 2000 and 2005, we analyze the relationship between commuting time, home production, and childcare. To deal with reverse causality, we use Propenstity Score Matching techniques to obtain imputed data for individuals. We find that the effect of home production on commuting time for women is more than double that for men, while childcare time has an effect on women's commuting behavior only. Our results shedding light on the Household Responsibility Hypothesis.     

A geography of residents' worry about the disruptive effects of contaminated sites

While the links between contaminated sites and adverse effects on human health and well‐being are being increasingly recognised, some argue that the magnitude of the health problem is inadequately addressed because it is largely invisible. Health geographies literature has sought to highlight this invisibility by focusing on the link between contaminated sites and health. This study adds to health geographies by presenting unique insights into the geography of residents' worry about the disruptive effect of environmental contamination on health and well‐being. It analyses a sample of residents (n = 485) living near 13 contaminated sites across Australia. Ordinal logistic regression analysis of closed‐format survey questions was combined with coding of open‐ended survey questions to reveal the geography of residents' worry about contamination from nearby sites. First, the study explores some of the main relationships between residents, their environs, and contaminants from nearby source sites, which determines their levels of worry: residents' demographics, residents' proximity to sites, contaminant boundaries and borders, and type of contaminant. Second, the study investigates how worry affects residents' health and well‐being, ranging from effects on their personal functioning through to their sense of ontological security, which depends in part upon their perceptions of contaminants' impacts. Despite having identified a range of diverse and negative effects of worry about contamination on residents, we found that worry for contamination can also prompt coping strategies and problem‐solving, reinforcing the need for more research on this subject.