Archaeogenetic study of prehistoric rice remains from Thailand and India: evidence of early <Emphasis Type="Italic">japonica</Emphasis> in South and Southeast Asia

We report a successful extraction and sequencing of ancient DNA from carbonized rice grains (Oryza sativa) from six archaeological sites, including two from India and four from Thailand, ranging in age from ca. 2500 to 1500 BP. In total, 221 archaeological grains were processed by PCR amplification and primary-targeted fragments were sequenced for comparison with modern sequences generated from 112 modern rice populations, including crop and wild varieties. Our results include the genetic sequences from both the chloroplast and the nuclear genomes, based on four markers from the chloroplast and six from the nuclear genome. These markers allow differentiation of indica rice from japonica rice, the two major subspecies of Asian rice (O. sativa) considered to have separate geographical origins. One nuclear marker differentiates tropical and temperate forms of subspecies japonica. Other markers relate to phenotypic variation selected for under domestication, such as non-shattering, grain stickiness (waxy starch) and pericarp colour. Recovery and identification of sequences from nuclear markers was generally poor, whereas recovery of chloroplast sequences was successful, with at least one of four markers recovered in 61 % of archaeological grains. This allowed for successful differentiation of indica or japonica subspecies variety, with japonica identified in all the Thai material and a mixture of indica and japonica chloroplasts in the two Indian assemblages. Rice subspecies was also assessed through conventional archaeobotanical methods relying on grain metrics, based on measurements from 13 modern populations and 499 archaeological grains. Grain metrics also suggest a predominance of japonica-type grains in the Southeast Asian sites and a mixture of japonica and indica in the Indian sites with indica in the minority. The similar results of grain metrics and ancient DNA (aDNA) affirm that grain measurements have some degree of reliability in rice subspecies identification. The study also highlights the great potential of ancient DNA recovery from archaeological rice. The data generated in the present study adds support to the model of rice evolution that includes hybridization between japonica and proto-indica.     

Effect of stereotomy on the lower bound value of minimum thickness of semi-circular masonry arches

Constructing structural systems with the minimal required cross section of its members was a strong motivation for progress whole along the history of building. This article investigates the effect of stereotomy on the minimum thickness value of a semi-circular arch made of masonry: a material with negligible tensile strength. The arch is modeled with its center line to which the loading is assigned according to arch length. Here, instead of some scalar parameters such as the rupture angle and the location of the middle hinge on the intrados, the geometry of the stereotomy is associated with a continuous function. Stereotomy-related constraints are introduced to keep the results feasible from an engineering point of view, and it is also demonstrated that they are essential for a well-posed constrained optimization problem. The necessary condition for a non-vanishing lower bound of minimum thickness values is derived analytically considering the assumptions of limit state analysis, infinite friction, and a no-tension material model. The lower bound thickness to radius ratio (t/R) is found to be t/R = 0.0819. A numerical method is introduced to demonstrate the existence of a valid stereotomy at the lower bound. Multiple admissible stereotomy patterns are presented at various minimum thickness values (higher than the lower bound) to demonstrate that suitable stereotomy for a fixed (t/R) ratio is far not unique—in general even the location of the middle hinge and the rupture angle might vary.     

Diet in transitory society: isotopic analysis of medieval population of Central Europe (ninth–eleventh century AD,Czech Republic)

Dietary behavior in the context of the formation of state structure, Christianization, and significant urbanization was studied, using the Great Moravian Empire (ninth–tenth century AD, Czech Republic) as a representative example. We also analyzed the impact of the disruption of social structure at the beginning of the tenth century and subsequent recovery of society during the eleventh century. Carbon and nitrogen isotopic values were measured in 189 adults (both sexes) and 74 animals representing different socioeconomic contexts (power centers/hinterlands) and chronology (Great Moravian/Late Hillfort period). Statistically significant differences in animal protein consumption were observed between centers and hinterlands. For centers, significant relationship was found between nitrogen isotopic values and socioeconomic status in males but not for females. Diachronic diet changes were observed, with the eleventh century diet characterized by higher millet consumption in both sexes and lower consumption of animal protein in males. These results confirm that Great Moravia represented a highly stratified society socioeconomically. Social status appears to determine the consumption of animal protein much more in males than in females. The diet of females also proved to be more uniform in the diachronic frame. The diachronic change in dietary behavior suggests that through the apparent recovery in the eleventh century, Moravian society did not reach its original level of welfare at least in terms of the quality of diet.     

Body mass estimation in skeletal samples using the hybrid approach: the effect of population-specific variations and sexual dimorphism

Body mass is estimated from skeletal records with low accuracy, and it is expected that population-specific equations derived by a hybrid approach may help to reduce the error in body mass estimates. We used 204 individuals from five Central European Early Medieval sites to test the effect of population-specific femoral head breadth equations on the accuracy of body mass estimates. The baseline for living body mass was computed using the biiliac breadth and stature. We also analyzed the agreement of five general femoral head techniques that are used in body mass estimation (Elliott et al. (Archaeol Anthropol Sci 1–20, 2015b; Grine et al. (Am J Phys Anthropol 97:151–185, 1995); McHenry (Am J Phys Anthropol 87:407–431, 1992); Ruff et al. (Am J Phys Anthropol 148:601–617, 2012); Ruff et al. (Am J Phys Anthropol 86:397, 1991)). Our results support previous findings showing that body mass is predicted with lower accuracy than stature, even when population-specific equations are derived. However, the population-specific approach increases the agreement with the body mass estimated from the biiliac breadth and stature, particularly when sex-specific equations are used. Thus, our results advocate for the employment of sex-specific equations when possible and show that the possibility of deriving equation for each sex separately is the main advantage of the population-specific approach. The best agreement among the body mass techniques in the Central European Early Medieval samples was observed using the femoral head equations reported by Ruff et al. (Am J Phys Anthropol 148:601–617, 2012) and McHenry (Am J Phys Anthropol 87:407–431, 1992), whereas other studied equations provided lower agreement. The particularly low performance obtained using the technique reported by Elliott et al. (2015b) questioned the use of their equations to estimate body masses.     

HISTORIANS AND THEIR SOURCES

This study analyses the development of the use of unpublished source material in Swedish doctoral theses in history, 1959–2015. The results show that the proportion of theses which rely on such materials has dropped in relation to the level that existed up to and including the year 2007. From having dropped below 90% only twice during the time period 1959–2007, the average for the years 2008–2015 is 77%. There are several explanations as to why this decline in use of unpublished source material has occurred. An initial explanation is that more doctoral theses are now published within the subdiscipline of historical science, in which, for example, history didactics and uses of history are included. History didactics and uses of history have gained more ground within the overall field of historical research during the last 10 years. The next-to-lowest figures are found in the category history of ideas, culture, and opinion history; a category which during the time period 2008–2015 remained at a fairly constant share of the total number of doctoral defences in history in Sweden in relation to the situation at the beginning of the 2000s.     

Facing Oligopoly and Protectionism: the fate of small producers in the inter-war nickel industry

In the inter-war era international cartels and oligopolies dominated several industries. At the same time trade barriers were increasing. This article explores the fate of two small nickel producers, the Canadian company Falconbridge and the Norwegian Raffineringsverket. Falconbridge operated a nickel refinery in Norway from 1929 onwards. The article shows that small firms could act as ‘free riders’ in the nickel market provided that they had sufficient ore resources, were vertically integrated and had low marginal costs. The article also demonstrates that the Great Depression, widespread rise of protectionism and the move towards autarchy had surprisingly limited impact on the international nickel industry. Somewhat similar developments can be found in several industries. The article thus offers some new perspectives on the growth of the Norwegian exports of metallurgical products and thereby on Norwegian economic performance in the 1930s.     

Medical Hermeneutics of Murder. Race,Medicine and Law in a Murder Case from Finnmark, 1911

Abstract

This article seeks to investigate the investigation of a murder case in Finnmark in 1911, where four siblings killed their young brother. In the legal investigations following the misdeed, a number of medical experts played a prominent role. Their role was to assess the mental condition of the defendants, but also to make sense of the murder. A specific interpretational mode was called for: a “medical hermeneutics” of the murder. The murder investigation becomes an occasion for discussing medical and juridical interpretations of human agency at the turn of the century, and especially of the role of the concept of “race” in these interpretations. For at least some of the physicians involved, the racial make-up of the ethnic group to which the actors belonged constituted an inevitable part of the context that made the act intelligible. Although the concept of race, and the conceptual frameworks offered by degenerationism and medical psychology to a certain degree made the act intelligible, these interpretational schemes had little to offer in terms of assessing the legal accountability of the defendants. Hence, the case illustrates the profound epistemological limits of medical interpretation in facing a legal case.