Teaching English in South Korea: mobility norms and higher education outcomes in youth migration

In many Western contexts, travel has a long historical association with youth, young adults and coming of age, an association that often connects temporary mobility with the lives of the educated middle classes and elite. Indeed, from the colonial adventure and the ‘grand tour’, to contemporary ideas of the ‘gap year’ or ‘overseas experience’, the mobility of Western youth and young adults is often considered voluntary and based on a desire to explore places and develop positive personal attributes, marking a stark contrast to depictions of migration from the developing world as directly or indirectly forced and driven primarily by economic considerations. This paper questions this depiction of developed world mobility in the context of the changing economic conditions that face young graduates in many Western countries. Drawing on survey and interview data I focus on the profiles and biographies of young adults from English-speaking countries working as foreign language instructors in South Korea. Although the personal narrative of travel and exploration amongst these individuals remains significant, findings from this research also suggest that many of these young graduates are also driven by economic circumstances: unemployment or underemployment and high levels of debt usually associated with tertiary studies. This tension between the opportunities available to young people and the constraints imposed by their own circumstances raises important questions about the multiple layers of social and economic differentiation operating through higher education and international mobility in the lives of young people.     

What causes failure (overheating) during lithic heat treatment?

Heat treatment of lithic raw material, i.e. the intentional alteration of silica rocks for improving their knapping quality, is a process that may require great care and precisely controlled conditions in order to avoid failure due to overheating. The physical causes of overheating remain poorly understood leading to problems in the interpretation of heat-treated artefacts and/or fire-related taphonomic alteration of different types of silica rocks. This driving force of overheating is investigated by a set of experimental heat treatment sequences with different ramp rates and different volumes of flint with a well-defined mineralogical composition, porosity and water content. The results of this experiment show the main cause of heat-induced fracturing to be the vapour pressure in fluid inclusions within the rocks. Heterogeneous thermal expansion could be discarded. The interdependence between volume and heating rate is also shown. These results have implications for the study of archaeological heat-treated rocks, the understanding of taphonomic heat-induced fracturing of silica rocks and experimental flint knapping.     

Sediment geochronology and spatio-temporal and vertical distributions of radionuclides in the Upper Bonny Estuary (South Nigeria)

Surface deposits and sediment cores were collected from the Upper Bonny Estuary, located in Southwest Nigeria, and analyzed to determine spatio-temporal and vertical distributions of radio-nuclide activities expressed in Bq·kg^?1 dry weight. The results of activities of naturally occurring radionuclides of ²²⁶Ra (15 ± 2–34 ± 3 Bq·kg^?1), ²²⁸Ra (32 ± 5–48 ± 6 Bq·kg^?1), ⁴⁰K (264 ± 29–462 ± 36 Bq·kg^?1) were found to be all within the range of typical values reported for coastal regions. Ratios of ²²⁶Ra to ²²⁸Ra suggested accretion for all samples with low sediment accumulation registered during rainy months. In addition, vertical distributions at the three sampling sites were also studied with the initial aim of establishing chronologies from the decay of excess ²¹⁰Pb. In two cores, excess ²¹⁰Pb, estimated by subtracting ²²⁶Ra from total ²¹⁰Pb on a layer-by-layer basis, exhibit relatively constant activity with discrete minima and maxima. Therefore, these cores were excluded from radiometric dating. Only the third core could be dated by the constant rate of supply model, and ¹³⁷Cs was utilized to validate the ²¹⁰Pb chronology.     

Misunderstanding the Question: ‘What is Enlightenment?’: Venturi, Habermas, and Foucault

In his 1969 Trevelyan Lectures, Franco Venturi argued that Kant's response to the question “What is Enlightenment?” has tended to promote a “philosophical interpretation” of the Enlightenment that leads scholars away from the political questions that were central to its concerns. But while Kant's response is well known, it has been often misunderstood by scholars who see it as offering a definition of an historical period, rather than an attempt at characterizing a process that had a significant implications. This article seeks (1) to clarify, briefly, the particular question that Kant was answering, (2) to examine - using Jürgen Habermas’ work as a case in point - the tension between readings that use Kant's answer as a way of discussing the Enlightenment as a discrete historical period and those readings that see it as offering a broad outline of an “Enlightenment Project” that continues into the present, and (3) to explore how Michel Foucault, in a series of discussions of Kant's response, sketched an approach to Kant's text that offers a way of reframing Venturi's distinction between “philosophical” and “political” interpretations of the Enlightenment.     

Alkali extraction of archaeological and geological charcoal: evidence for diagenetic degradation and formation of humic acids

Charcoal forms a crucial source of archaeological and palaeoenvironmental data, providing a record of cultural activities, past climatic conditions and a means of chronological control via radiocarbon (¹⁴C) dating. Key to this is the perceived resistance of charcoal to post-depositional alteration, however recent research has highlighted the possibility for alteration and degradation of charcoal in the environment. An important aspect of such diagenesis is the potential for addition of exogenous “humic acids’ (HAs), to affect the accuracy of archaeological and palaeoenvironmental reconstructions based upon chemical analyses of HA-containing charcoal. However the release of significant quantities of HA from apparently pristine charcoals raises the question whether some HA could be derived via diagenetic alteration of charcoal itself. Here we address this question through comparison of freshly produced charcoal with samples from archaeological and geological sites exposed to environmental conditions for millennia using elemental (C/H/O) and isotopic (δ¹³C) measurements, Fourier Transform Infrared Spectroscopy (FTIR) and proton Liquid-State Nuclear Magnetic Resonance (¹H NMR). The results of analyses show that the presence of highly carboxylated and aromatic alkali-extractable HA in charcoal from depositional environments can often be attributable to the effects of post-depositional processes, and that these substances can represent the products of post-depositional diagenetic alteration in charcoal.     

Variety and Adventure in the Life of Carl Linden

Abstract

In his long life Carl Linden lived variously and wonderfully. For more than half a century he was a teacher and promoter of Great Books in the classroom and in the neighborhood. Great Books in his hands and mind transformed him into a kind of latter-day Socrates, always questioning, always smiling, sometimes teasingly. As a naturalist he was a hiker/biker on the C&O Canal towpath and promoter of it, as well. His scholarly pursuits took him to Eastern Europe, especially to Russia and Ukraine, about which he wrote and taught for four decades. Finally, he was a bon vivant whose Socratic ways won him laurels in the classroom and friends in the places where good fellows meet.     

The Periphery's Terms of Trade in the Nineteenth Century: A Methodological Problem Revisited

Abstract.

There is a major downward bias in the trend of most existing estimates of the periphery's nineteenth-century terms of trade. By using prices from the North Atlantic core as proxies for prices in the peripheral countries themselves, historians ignore the dramatic price convergence that took place during the nineteenth century. Measured correctly, the periphery's nineteenth-century terms-of-trade boom would appear considerably longer, greater, and more widespread than Jeffrey Williamson (2008 Williamson, J. G. 2008. Globalization and the great divergence: Terms of trade booms, volatility and the poor periphery, 1782–1913. European Review of Economic History 12:355–91. http://dx.doi.org/10.1017/S136149160800230X.[Crossref], [Web of Science ®] , [Google Scholar], 2011 ———. 2011. Trade and poverty: When the Third World fell behind. Cambridge, MA: MIT Press. [Google Scholar]) supposes, greatly reinforcing his grand narrative about the relation between globalization and the “great divergence.” Many of the details of his narrative, however, must be revised. This is illustrated by the case of India.