Experimental studies of personal ornaments from the Iron Gates Mesolithic

Personal ornaments, especially those made from the shells of marine mollusks and animal teeth, have been recovered from many Mesolithic sites across Europe. This paper reviews the evidence of personal ornaments from the Mesolithic of the Iron Gates, where such finds were identified in five sites on the Romanian bank: the cave and rock shelter sites of Climente II and Cuina Turcului, and three open-air sites—Icoana, Ostrovul Banului, and Schela Cladovei. The ornaments from these sites were made from the shells of several gastropod taxa and at least one species of dentaliid scaphopod, as well as the pharyngeal teeth of cyprinids, the teeth of several species of terrestrial mammal, fish vertebrae, and pieces of antler and bone. Particular attention is given to taxonomic identification and questions of taphonomy, provenance, selection, manufacture, and use. Experiments were conducted in which several types of ornament were replicated. Archeological and experimental pieces (at various stages of production) were examined under a microscope, to establish the durability of the beads and estimate the length of time over which they were worn. Our results show that shells of Lithoglyphus and Theodoxus sp. were simply perforated and fixed in composed adornments, as were shells of Tritia neritea in the early part of the time range. In the later Mesolithic, T. neritea shells were processed in a different way and fixed to clothing in the manner of appliqués. No technological modification of the cyprinid teeth was observed; these were sewn individually onto clothing by means of a thread coated with an adhesive substance. The other categories of personal ornament were used mainly as pendants. Experimental use-wear analysis suggests that many ornaments were used over long periods, with broken or missing pieces replaced when necessary.     

Chemical U-Th-Pb geochronology: A precise explicit approximation of the age equation and associated errors

In a single decaying system, the age determined from the exponential decay law is directly related to its linear Maclaurin approximation. This relationship can be additively extended to several decaying systems resulting in the same daughter element, by using proportionality functions, thus allowing an explicit formulation of the age as a function of element concentrations. The values of the binary proportionality function for the ²³⁸U-²³⁵U-Pb system and the ternary proportionality function for the ²³²Th-²³⁸U-²³⁵U-Pb system were determined by iterations of the exponential decay formula up to 4 Ga, with a step of 10 Ma, for a set of 24 different U/Th ratios. From the iteration data, the expressions of the two functions and the associated coefficients were determined by polynomial regression and mathematical programing on conveniently separated time and compositional intervals. Additional time- and composition-dependent age corrections optimized by mathematical programming of the residuals lead to an accuracy of 0.005 Ma of the resulting age. The error propagation can be traced through all the operations defined by explicit formulas according to simple error propagation rules, finally allowing the calculation of the standard error of the result. The formulas and parameters derived can be used in a calculation spreadsheet.     

The Effect of Accelerated Alteration on the Discrimination between Baltic and Romanian Amber

Ten geological samples (five from each source—Romanian amber and Baltic amber) in duplicate for five different media (air, water, saline, acid and basic) were subjected to thermal alteration at 80 ± 2°C for 12 weeks, in the dark. The samples were analysed before and after the accelerated alteration experiment by Fourier transform infrared spectroscopy, both in transmittance and reflectance mode, and the acquired spectra were statistically processed by multivariate data analysis, mainly using principal component analysis. The results of the experiment are useful in giving a better picture of how to discriminate between archaeological amber artefacts.     

Remembering Ancestors: Commemorative Rituals and the Foundation of Historicity

One of the most elaborated responses to the human perception of being‐in‐time (as the essence of historicity) has been the cult of the ancestors. Consequently, the ancestor cult may be considered foundational for historicity. This is the core idea of this article. It is illustrated with Romanian ethnographic data and elaborated with cross‐cultural examples. A few objects used in commemorative rituals—coliva (a special dish), trees and pots—are interpreted according to their symbolic force of enabling people to live temporality not only fragmentarily (past?+?present?+?future), but as a transcendental unity of the temporal continuum. Finally, the functions of history are specified—namely, identity defining, the critical function, and especially (as revealed by the ancestor cult) the function of memorialization.     

Towards a history of the geometric foundations of mathematics

Many XIX^th century «geometers»—such as Bernhard Riemann, Hermann von Helmholtz, Felix Klein, Riccardo De Paolis, Mario Pieri, Henri Poincaré, Federigo Enriques, and others—played an important role in the discussion about the foundations of mathematics. But in contrast to Euclid's ideas, they did not simply identify “physical space» with the «space of the senses». On the basis of our experience in space, they intended to determine the main properties of space and put them at the very foundation of geometry. The axioms of geometry were hence based on active knowledge of space and were not aa priori, as in the case according to kantian philosophy. Moreover, in the last decade of the century some Italian mathematicians—De Paolis, Gino Fano, Pieri, and others—founded the concept of number itself on geometry, by using results of projective geometry. Arithmetic, was then founded on geometry and not reversely, as David Hilbert tried—without success—to do some years later.     

A Moldovan ‘sheep'? – framing Moldovan passivity

This article offers a different perspective for understanding Moldovan discourses of passivity by turning its attention to representations of national identity. Its main focus is a Moldovan ballad, Miori?a, and the way in which it discursively both frames and legitimises inaction. It builds on the idea that Miori?a is a central part of the way in which Moldovans represent their identity with respect to the writings of Ion Dru??, its main promoter in Moldovan society. More importantly, the ballad is conceptually linked to national characteristics such as lamentation and kindness, characteristics that can be summed up under the headline of ‘passivity’. Thus, drawing from constructivist and post‐structuralist approaches, the article stresses how these elements inform the Moldovan view of the self, its identity and even its representations of foreign affairs, framing the Moldovan lack of agency on a discursive level.