An Analysis of Actual and Potential Clustering Structures,Stakeholder Governance Activities and Cross-locality Linkages in the Welsh Aerospace Industry

Commercial aerospace is a key sector in the Welsh economy, engaged in complex overlapping activities from aircraft manufacture (AM), through maintenance, repair and overhaul (MRO), to research, development and training (RDT). Defining and operationalizing a framework for analysis using both qualitative and quantitative data, this paper examines the actual and potential roles of the relationships in Wales between commercial aerospace firms, industry, government and institutional stakeholders, at both local and non-local levels. Concentrations of manufacturing in North Wales, and MRO in South Wales along with RDT operate as distinct constituent parts of aerospace clusters in neighbouring regions of England and beyond. The results, however, highlight links between the location of AM, MRO and RDT in Wales, emphasizing their (partially) geographically symbiotic relationships. Moreover, there are key inter-linkages that need consideration if the long-term health of Welsh aerospace is to be secured. Simultaneously, all three sub-sectors in Wales exhibit weaknesses which could render them vulnerable to greater external competition, particularly from developing countries. This emphasizes a need to alter the current governance arrangements and utilize different clustering characteristics that currently exist, with government, as a major sponsor of the industry, having a strong (but changing) role to play in encouraging these more balanced industry structures and decision-making processes.     

Thermoluminescence as a technique for determining the nature and history of small solar system particles

The thermoluminescence phenomenon has been used for pottery dating and radiation dosimetry for sixty years and for forty years has been applied to the study of meteorites, being successful in quantifying metamorphic histories and providing new insights into terrestrial age and orbits. Here we review some of the fundamental properties of thermoluminescence with particular focus on the study of small extraterrestrial particles. We suggest that natural TL data can be used to identify the burial and release history of cometary particles and that induced TL measurements can provide in-sights into the mineralogy of particles (even when largely amorphous) and the metamorphic history of those particles. We illustrate the use of TL to study small particles by describing recent studies on micrometeorites and 10–100 μm fragments taken from the matrix of a meteorite Semarkona which is type 3.0 ordinary chondrite.     

Prehistoric iron production technologies in the Upper Thai-Malay Peninsula: metallography and slag inclusion analyses of iron artefacts from Khao Sam Kaeo and Phu Khao Thong

This article presents a preliminary attempt to characterise Upper Thai-Malay Peninsula prehistoric iron technologies based on assemblages from two recently excavated coastal sites: Khao Sam Kaeo and Phu Khao Thong. These are the earliest known sites involved in the early trans-Asian exchange that connected the eastern Indian Ocean to the South China Sea from the mid-first millennium bc. It is from this period that iron assemblages start appearing at both continental and insular Southeast Asian sites. Three models have been offered confronting an indigenous vs. Chinese or South Asian impetus for the introduction of iron metallurgy in Southeast Asia. These models are discussed in the light of the metallographic and compositional analyses of iron and slag assemblages from these two sites using optical microscopy, scanning electron microscopy with energy dispersive spectrometry, energy dispersive X-ray fluorescence and slag inclusion analysis techniques, together with other production materials from these and other contemporaneous Southeast Asian sites.     

The Figure of Yan Zhuoju 顏涿聚 in Ancient Chinese Literature

Contributing to the surging interest in rhetorical uses of anecdotal narratives in ancient China, the present article investigates sources about a purported follower of Confucius going by the name of Yan Zhuoju, or variants thereof. The main advantage of focusing on such an obscure figure is that extant sources can be exhaustively analysed – an approach intractable for more fully documented personalities – in order to gauge the mechanisms which created the textual record historians utilise to reconstruct events of the ancient past. The article demonstrates how the same figure can be appropriated across different discourses, to wit, in attacks on Confucius's alleged improprieties; in attempts to counter such attacks; and in arguments for the increasingly meritocratic social order of the Warring States period. Rarely adding up to a complete story, such appropriations are constituted by fragmentary narratives, summary statements, and intertextual references.