Atmospheric deterioration of Qin brick in an environmental chamber at Emperor Qin's Terracotta Museum, China

Potential mechanisms for the changing appearance of Qin terracotta was evaluated on simulated bricks with, SO₂, NH₃, O₃, and a NH₃/O₃ mixture for total dosages of 2.2–5.4 ppm-years. Changes in the surface composition and appearance were evaluated with scanning electron microscopy/energy dispersive X-ray analysis (SEM–EDX) and X-ray photoelectron spectroscopy (XPS). No observable changes with O₃ exposure were found. Sulfate as sulfur and ammonium as nitrogen increased by 1.2 at% and 0.8 at% of the surface deposit as determined by XPS. O₃ did not have a detectable effect by itself, but when combined with NH₃, NO₃ as nitrogen increased by 1.5 at%, indicating a strong oxidation of NH₃ to nitric acid. The combination of outdoor O₃ infiltration with indoor NH₃, presumably from the visitors, appears to have a greater potential for damage than either pollutant by itself. SEM–EDX mapping of the surface showed sulfur associated with calcium and magnesium compounds after SO₂ exposure, but not before. More detailed microscopic examination showed this primarily in the form of gypsum, especially near cracks and pits in the surface. Both of these mechanisms are probably among the causes of changes in terracotta appearances since they were unearthed in 1974.     

A Model for Measuring the Sustainability Level of Historic Urban Quarters

The main aim of this paper is to propose a model for measuring the sustainability level of historic urban quarters and to indicate an appropriate strategy for their revitalization. Based on this aim, this study first presents the theoretical review on the concept of “revitalization”, and its relationship with sustainability; next, it introduces the characteristics, role, selection process and scaling method of sustainability indicators, which are essential for measuring the level of sustainability. The paper then, as the main contribution of this paper, proposes the model for measuring the level of sustainability in historic urban quarters and determines some proposals to achieve revitalized and sustainable historic urban quarters. Depending on the proposed model, there is a direct relationship between type and the level of obsolescence (revitalization) and the level of sustainability in the physical, economic and social structures of a particular area. Therefore, when the level of sustainability is high in any one of these three structures, it means that the level of obsolescence is low in the same structures of an historic urban quarter. The result of this paper leads us to say that, the level of sustainability is a new (additional) input in the strategic planning process of revitalization and sustainable urban revitalization of historic urban quarters. Finally, the paper concludes with a brief summary on the general arguments of the paper.     

Using Optical Coherence Tomography to Examine Additives in Chinese Song Jun Glaze

We use optical coherence tomography (OCT) to acquire microstructure images of Chinese Song Jun glaze to reveal the copper and quartz additives used and, in two typical samples, we show that the amount added is considerable. Focusing on these two additives, including the species, amount and granule (particle) size added in the glaze, the objective of the present study is to explore how they functioned in relation to the Jun glaze's visual characteristics, opalescence and sky‐blue colour, attributed to the unique liquid–liquid phase separation that occurs in Jun glaze.     

The Role of Pattern‐Welding in Historical Swords—Mechanical Testing of Materials Used in Their Manufacture

Pattern‐welding is a well‐known technique that was widely employed in the manufacture of swords. While the decorative effect of genuine pattern‐welding (employing phosphoric iron) is indisputable, to date its reinforcing effect is rather unclear. In order to understand this issue better, wrought iron, phosphoric iron, steel and various pattern‐welded samples were prepared and mechanically tested, and the results obtained are discussed in detail. Both the mechanical testing and the long‐term metallographic investigation of medieval swords suggest that pattern‐welding does not have any significant positive effect on the mechanical properties of swords and we should consider it a primarily decorative technique.     

Stealing the Water of Life: The Historicity of Contemporary Social Relationships

Pacific anthropology has predominantly concentrated on documenting the pre‐contact past or an acculturated present. This article explores an alternative focus on contemporary relationships, seen as both exhibiting historicity and agentive power. The control over scarce but vitally important resources, such as land and water, is the responsibility of the village leadership in the Tokelau atolls. The regulation of social behaviour establishes fecundity and agency in a manner that lends order to the universe. However, the achievement of a position of command, in particular over rights to land, is dependent upon knowledge of the past and of genealogical connections in the present. Claims to positions are commonly challenged, and this dynamic of contested ascendancy means that the past is always significantly present, although in different shapes.     

Rising Sino-Japanese competition: perspectives from South-East Asian elites

One of the biggest challenges for the East Asian region today is the Sino-Japanese relationship. Starting with the fishing trawler incident in September 2010, followed by Japan's nationalisation of the Senkaku/Diaoyu Islands, this relationship is experiencing an escalation of tensions in most, if not all, areas of the bilateral relationship. In response to the intensifying competition, China and Japan have elevated the importance of South-East Asia and the Association of Southeast Asian Nations (ASEAN) in their foreign policy strategies. Focusing on how elites from five South-East Asian states—Indonesia, Malaysia, the Philippines, Singapore and Vietnam—perceive the engagement of China and Japan with the region, this article poses two questions: (1) How do South-East Asian elites view the Sino-Japanese competition? and (2) How do South-East Asian elites view the role of ASEAN in managing the competition? The analysis here concludes that while some South-East Asian elites see opportunities in the Sino-Japanese competition, they nevertheless do not perceive it as an issue of critical significance. Instead, the concern lies generally with major-power dynamics, and particularly with Sino-US relations. ASEAN is viewed to lack the ability to manage the negative consequences of the Sino-Japanese competition, although its external balancing function has perceptibly helped to restrain any escalation of major-power tensions.