Optical spectroscopy as a rapid and low-cost tool for the first-line analysis of glass artefacts: a step-by-step plan for Roman green glass

Archaeometric research on glass artefacts is continuously evolving and is converging towards a multidisciplinary research domain where different types of techniques are applied depending on the questions asked and the circumstances involved. The technique described in this work is optical spectroscopy. The benefit of this technique being the possibility of building up a knowledge database for a large amount of material in a relatively short period of time and with a relatively limited budget. This is of particular interest for the investigation of extensive and/or unexplored glass collections where a first-line analysis of artefacts could facilitate the selection of material needing further and more detailed examination.     

Public parks in Ghent's City life: From expression to emancipation?

With three empirically based and theoretically framed case studies, this paper contributes to the understanding of how public spaces, more specifically urban parks, can mediate between different subgroups of society, such as women, seniors, gays and skaters, and how gender related connotations play an important role in these respects. This study draws upon a comparative analysis of three parks in Ghent, Belgium. The elements of analysis are the physical morphology, history, signification and the use by different kinds of park visitors. The article shows a new approach to design of public spaces.     

Behind the Ties that Bind: Diaspora-making and Nation-building in China and India in Historical Perspective, 1850s-2010s

Whereas the rare existing comparative studies of Chinese and Indian diaspora policies have focused on recent periods following economic restructuring in both countries, this article, using a historical perspective, looks at diaspora policies in both countries from the angle of conceptions of the nation. Comparing three specific periods – the early twentieth century, the period between the 1950s and the 1970s, and the period since the 1970s – the article argues that there was a similarity between China and India in terms of how conceptions of the nation expanded and contracted together with both domestic and international changes during these periods, in spite of differences in nationality laws. As such, it demonstrates that countries with nationality laws based on jus sanguinis are not necessarily always more inclusive towards diaspora populations than those with nationality laws based on jus soli. In both cases, there is a tension at work between a state-led paradigm that is territorial in nature and ethnic and cultural notions of nationhood.     

On Microlithic Quartz Industries at the End of the Pleistocene in Central Africa: The Evidence from Shum Laka (NW Cameroon)

The rock shelter of Shum Laka, situated in the Grassfields of northwestern Cameroon, was occupied during the later Pleistocene and Holocene. Plant remains reveal that there were no drastic changes in the immediate environment of the shelter between 30,000 and 10,000 bp. The industry is microlithic during this entire period. Quartz was deliberately chosen as the preferred raw material and there were no changes in technology or raw material usage over time. A comparison with similar sites in the northeastern Democratic Republic of Congo reveals that the microlithic quartz tradition was apparently appropriate for the exploitation of a wide variety of environmental settings. This flexibility may represent an adequate technological response to the environmental changes in Central Africa at the end of the Pleistocene.L'abri sous roche de Shum Laka, situé dans les Grassfields au nord-ouest du Cameroun, a été occupé depuis la fin du Pléistocène. Les restes de plantes montrent qu'il n'y a pas eu de changements importants dans l'environnement immédiat de l'abri entre 30,000 et 10,000 bp. L'industrie est microlithique pendant toute cette période. Le choix du quartz comme matière première préferentielle était délibéré par ailleurs, ni la technologie, ni l'utilisation des matières premières n'ont subi de modifications conséquentes au cours de cette période. Une comparaison avec des sites similaires du nord-est de la République Démocratique du Congo nous montre que la tradition microlithique sur quartz aurait été appropriée dans l'exploitation d'une grande variété d'écosystèmes. Cette flexibilité pourrait traduire une réponse technologique adéquate face aux changements environnementaux qui ont eu lieu en Afrique Centrale à la fin du Pléistocène.     

Human Responses to Changing Environments in Central Africa Between 40,000 and 12,000 B.P.

Reconstructions of the Equatorial forest in Central Africa fuel the debate on whether hunter-gatherers at the end of the Pleistocene were capable of living in or off the forest prior to the advent of agriculture. Their traces are rare and often reduced to their stone equipment. In an attempt to see to what extent technology and environmental exploitation are interrelated, all Central African sites dated between 40,000 and 12,000 B.P. are analyzed for their material culture, the environmental setting at the time of the occupation, and the exploitation of that environment. Although the evidence is still circumstantial, two large technological traditions have been recognized in Central Africa at the end of the Pleistocene, the Lupemban and microlithic industries, and both are associated with a variety of environments. This, in combination with a fragmented forest and concomitant increase of ecotone during the Last Glacial Maximum, would have enhanced rather than hampered human occupation in the area. It may be argued that the inherent flexibility and capability of exploiting a variety of environments enabled the hunter-gatherer communities to face and adapt to environmental changes regardless of stone technology.     

Beyond the divide: evaluation in co-evolutionary spatial planning

Spatial developments are becoming increasingly a-linear and dynamic with a wide range of possible actors. The awareness of uncertainty is growing and, therefore, projects need to integrate a high level of flexibility. But simultaneously, there is a growing demand for more informed and well-argued decisions. Predictions from the ‘best estimated model’ are no longer credible nor accepted, being too fragile and uncertain. How can we keep long-lasting, multi-actor projects in permanent transition on track? This expresses an important demand for more integrated evaluation in spatial planning. In this respect, this paper analyses existing theoretical evaluation strategies and how these strategies deal with spatial developments. They are still usually structured along static, generic and circular approaches; in fact, many neglect the dynamic, plural and a-linear realities. Therefore, this paper develops a post-structural evaluation approach for various planning issues and different playing fields of actors, followed by an illustration of the various settings for this approach in a Flemish case. Finally, we discuss how spatial planning and future plans might be evaluated with a dissipative role for evaluation.     

Aristocratic patronage,political networking and the shaping of a private sanctuary: Countess Clemence of Flanders and the early years of Bourbourg Abbey (c.1103–21)

This article discusses the geopolitical manoeuvres of the comital House of Flanders, especially of Countess Clemence of Burgundy, to consolidate comital influence and power in the border region of western Flanders, specifically in the area of Bourbourg. By analysing and mapping the shifting patterns of interaction between alliances of both secular and ecclesiastical stakeholders in the charters issued for the abbey of Bourbourg, a female house, during the first decades of the twelfth century, it argues that the foundation and patronage of Bourbourg were engineered to create a symbolic and geo-strategic key site where the interests of the counts of Flanders and their local representatives, the abbot of Saint-Bertin, and members of the local elite converged, and alliances balanced each other. Moreover, through an anthropological approach in which the charters are also considered within the supra-institutional context of the reform movement, this study offers new insights into the dynamic role of Countess Clemence as a promoter and benefactor of Bourbourg Abbey, and also as a manager of her personal network of allies.     

Numerical Modeling of a Church Nave Wall Subjected to Differential Settlements: Soil-Structure Interaction,Time-Dependence and Sensitivity Analysis

ABSTRACT

Historic masonry structures are particularly sensitive to differential soil settlements. These settlements may be caused by deformable soil, shallow or inadequate foundation, structural additions in the building and changes in the underground water table due to the large-scale land use change in urban areas.

This paper deals with the numerical modeling of a church nave wall subjected to differential settlement caused by a combination of the above factors. The building in question, the church of Saint Jacob in Leuven, has suffered extensive damage caused by centuries-long settlement. A numerical simulation campaign is carried out in order to reproduce and interpret the cracking damage observed in the building.

The numerical analyses are based on material and soil property determination, the monitoring of settlement in the church over an extended period of time and soil-structure interaction. A sensitivity study is carried out, focused on the effect of material parameters on the response in terms of settlement magnitude and crack width and extent. Soil consolidation over time is considered through an analytical approach. The numerical results are compared with the in-situ observed damage and with an analytical damage prediction model.