Archaeomagnetic versus luminescence methods: the case of an Early Byzantine ceramic workshop in Thessaloniki,Greece

In this contribution, we present a combined archaeomagnetic and luminescence study of archaeologically dated structures. The investigated area is a ceramic workshop comprising several Early Byzantine kilns. Based on (a) the archaeological–anthropogenic stratigraphy of the site, (b) the structural characteristics of the kilns and (c) the few ceramic findings revealed within their context, the operation of this brick and tile factory is approximately dated between the middle of the fifth century until the first decades of the sixth century AD. Three of the well-preserved workshop kilns have been studied archaeomagnetically. The full vector of the geomagnetic field, accompanied by rock magnetic analyses of the studied material, has been defined. The archaeomagnetic study revealed similar directions among the three kilns indicating and confirming their contemporary use. Additionally, several luminescence measurements were obtained on material from the same kilns. The dating of the site was performed with both methods. The archaeomagnetic dating is convergent with the archaeological estimation only when its upper limit is considered. Concerning the luminescence dating, the calculated ages (corrected for anomalous fading and for the ⁴⁰K content) with their standard deviations are convergent with the archaeological estimations for the first kiln, while for the other two, the results seem to be incompatible. The possible factors that provoked this divergence are thoroughly discussed.     

Multi-method (TL and OSL), multi-material (quartz and flint) dating of the Mousterian site of Roc de Marsal (Dordogne,France): correlating Neanderthal occupations with the climatic variability of MIS 5–3

Roc de Marsal has yielded numerous remains of Mousterian occupations, including lithics, fauna and combustion features. It was made famous by the discovery of the skeleton of a Neanderthal child. Given the need to date the sequence, TL and OSL were applied on heated flints and quartz, and OSL on unheated quartz. Chronological results combined with palaeoenvironmental data – faunal remains and micromorphological features in the sediments from the cave, pollen proxies and faunal remains from the region – allowed us to place climate variations in southwest France on a numerical time scale. Denticulate Mousterian occupations were dated to the middle of MIS 4 (65–70 ka) and Quina layers either to the very end of MIS 4 or to MIS 3. Interestingly, a faunal pattern showing a mix of red deer, roe deer and reindeer was found to have occurred during MIS 4, which was shown to be consistent with data from other similar sites in southwest France.     

Testing of Superelastic Recentering Pre-Strained Braces for Seismic Resistant Design

Over the past decade, the use of shape memory alloys (SMAs) in passive control devices has been explored. Nevertheless, some aspects in regards to the cyclic behavior of SMAs and the effect of pre-straining need to be clarified. In this study, small-scale shake table tests have been performed to explore the effectiveness of SMA bracing systems as compared to steel bracing systems. The reduced-scale experimental results imply that SMAs used in braces are more effective in controlling the response of a steel frame compared with a traditional bracing system. A finite element model (FEM) of the frame is developed in order to compare the analytical results with the shake table tests. Further, the effect of pre-straining the SMA braces is evaluated through both experimental and analytical studies. The results show that pre-straining improves the performance of the frame compared to the nonpre-strained case. However, as the level of pre-straining increases above approximately 1.0% to 1.5%, the benefits of pre-straining decrease compared with low-to-moderate pre-strain levels.     

Ethnic Performance and the State in Laos: The Boun Greh Annual Festival of the Khmou

Following the 1975 revolution, the Laotian statesmen adopted a modernising discourse that targeted “backward” traditions as undesirable. But since the 1990s, authorities have mitigated this standpoint, distinguishing “good” from “bad” traditions according to their compatibility with the program of national development, and professing their will to (re)instate the former as suitable expressions of culture in a multi-ethnic nation. This is manifest everywhere from the National Constitution to TV shows and ethnic catalogues. This paper analyses the implementation of these principles through the case of the boun greh New Year festival, an invented ethnic tradition of the Khmou, the largest ethnic minority in Laos. The article demonstrates that this implementation has consequentially implied the adoption of a grammar of national ethnicity; that this official framework paradoxically allows the Khmou to articulate demands for better recognition of their group; and that this process does not mute expressions of “cultural intimacy” at variance with this matrix. The official frame of ethnicity has been eventually adopted by the Khmou, but this state effect has multiplied the layers of expressed ethnicity: it cannot be equated with a unilateral regimentation that would deprive the Khmou of their agency.     

The creation of a Ministry of Culture: towards the definition and implementation of a comprehensive cultural policy in Peru

In June 2010, a Ministry of Culture was created in Peru, raising many questions regarding the ability of this new administrative structure to effectively implement a comprehensive cultural policy, which has been lacking so far, for the Peruvian State has based its previous policies almost exclusively on the preservation of cultural heritage. The Ministry inherits the flaws of the National Institute of Culture, and must address various challenges: the improvement of heritage management; the inclusion of indigenous populations in a never established national identity; a renewed scheme of promotion of the arts and incentives to cultural industries. The article discusses possible policy options for the new ministry, evidences the needs for a renovation of bureaucratic culture within the ministry, for clarification in the objectives set to the Ministry and for more comprehensive data about cultural practices in Peru.     

ESR dose response of Al center measured in quartz samples from the Yellow River (China): Implications for the dating of Upper Pleistocene sediment

The ESR dating method requires to describe the evolution of the ESR signal intensities vs. increasing gamma doses, then to extrapolate the equivalent dose of radiation received by the sample since its deposition using mathematical fitting. The function classically used to describe the growth curves of ESR aluminium signal in quartz was recently discussed and challenged for Lower Pleistocene sediments. In the present work, some alluvial sediments sampled in Upper Pleistocene fluvial terraces of the Yellow River system (China) permit us to test the application of another extrapolation function (linear + exponential) recently proposed for Lower Pleistocene sediments. The equivalent doses obtained here for the recent deposits of the Yellow River system and the corresponding ages are promising and indicate the potential of ESR to date quartz deposits from Upper Pleistocene times.