The Urban Emergence of a New Information Industry: Sydney's Multimedia Firms

This paper analyses the multimedia industry in Sydney. It seeks to understand whether the emergence of the industry has involved dense horizontal and vertical inter‐firm linkages characteristic of an industrial cluster, or whether the industry has grown because of general urbanisation economies related to such factors as skilled labour supply and market demand. The industry is highly concentrated in and around central Sydney. This provides the best access to firms’ main clients, notably advertising companies and other multimedia firms. It also reflects the centralised location of skilled labour such as web designers. While there is evidence of an emerging inner Sydney multimedia cluster which includes graphic design and advertising and related media, the main driver of the industry's development appears to have been general demand from advertising and related media companies, in association with the pool of computer graphics talent generated by these companies.     

Intra-skeletal variability in trace elemental content of Precolumbian Chupicuaro human bones: the record of post-mortem alteration and a tool for palaeodietary reconstruction

This study applies an intra-skeletal sampling strategy to examine post-mortem alteration of archaeological human bone from west Mexico, and to reconstruct ancient diet. Human bone from the Chupicuaro culture (Mexico, Preclassic period) constitutes an ideal material with which to examine subsistence strategies because the specific hydrothermal environment in which the population lived would have provided certain food components (hydrothermal waters and carbonates) with distinct signature in Ca, Mg, F, Li, Sr, Mn, V and U values. Four to ten samples were taken from the long bones of six skeletons. Bone trace element content (Ca, P, F, Mn, Mg, Na, Li, V, Zn, Rb, Sr, Ba, Y, La, Ce, Nd, Th, U) and bone alteration parameters (crystallinity, organic matter and secondary calcite content) were analysed at the intra-skeletal level. Stable isotopic signatures (bone δ¹³C and δ¹⁸O_carbonate) and histological analyses were also performed on a single bone from each individual. Results indicate that all of the skeletons were affected by post-mortem mineralogical, structural and geochemical transformations. Biological bone δ¹³C values seem preserved for most of the individuals but an increase in crystallinity accompanies depletion in bone δ¹⁸O values. The combination of bone alteration parameters with bone elemental content shows that in this very specific context, a widespread dissolution-recrystallisation is unlikely. Of the hydrothermal tracers, Sr, F and Li were of particular interest because their retention in living tissues is related to the amount ingested. The intra-skeletal Li content does not reveal any pattern but Li depletion is not excluded. In contrast, Sr and F show a progressive intra-skeletal diagenetic enrichment likely due to gradual diffusion–adsorption processes. The bones with the lowest concentrations in these elements are assumed to yield the best representative ante-mortem values. The signal extracted from each skeleton, a very unusually high bone Sr, F and Li content, is interpreted as reflecting the consumption of the local hydrothermal products, which are also enriched in these elements.     

The challenge of proximity: the (un)attractiveness of near-home tourism destinations

ABSTRACT

Imaginaries of touristic otherness have traditionally been closely related to geographical distance and travel far away from the everyday. But in today's context of sustainable tourism, a moral and behavioral shift may be expected, toward traveling near home. Distance may actually become a disadvantage and proximity a new commodity. This implies a need to disentangle subjective understandings of both distance and proximity in relation to perceived attractiveness of and touristic behavior in places near home. Thus, it is aimed to shed light on how ‘proximity tourism’ is constructed, endorsed and appreciated (or not).

An online survey (N = 913) was administered to residents of the Dutch province of Friesland, exploring their attitudes toward their home province as tourism destination and representations of proximity and distance in relation to preferred vacation destinations. We grouped respondents into four categories, reflecting destination preferences: (1) proximate, (2) distant, (3) intermediate and (4) mixed. These groups were differentiated and characterized using quantitative and qualitative analyses. The ‘proximate’ and ‘distant’ preference groups, respectively, were most and least engaged in proximity tourism. However, the perceptions of proximity and distance expressed by the ‘intermediate’ and ‘mixed’ preference groups were associated in a nonlinear way with appreciation of the home region as a tourism destination. Additionally, respondents used proximity and distance in various ways as push, pull, keep and repel factors motivating their destination preferences.

Interpretations of both proximity and distance were thus important in determining engagement in proximity tourism and, in turn, the potential for proximity tourism development in the region. This implies that such development will require a balanced consideration of the relative, temporally sensitive ways that people negotiate distance and proximity in their perceptions of being at home and away. Our results advance the discussion about imaginaries of travel, distance and proximity, and their impact on regional tourism.     

Direct Displacement-Based Seismic Design of Eccentrically Braced Steel Frames

A series of eccentrically braced frames (EBF) are designed and subjected to nonlinear analyses to highlight ambiguities and differences in current seismic design provisions for EBF structures. This provides motivation to implement better guidance for the checking of local displacement demand considerations and move towards a displacement-based design approach. A recently proposed direct displacement-based design (DDBD) procedure for EBFs is then described and further developed in this article through the calibration of a spectral displacement reduction factors that relate the displacement of an inelastically responding structure to that of the equivalent linear representation used in the DDBD of EBFs. Such an expression is calibrated as part of this study using an experimentally validated numerical model also proposed here for the EBF links such that the actual hysteretic behavior of the links is well represented. The DDBD guidelines are applied to EBF systems from 1–15 stories in height and their performance is verified via nonlinear dynamic analyses using two different sets of design spectrum compatible ground motions. The results of the study indicate the robustness of the proposed DDBD method in limiting the interstory drifts to design limits for a variety of EBF systems with short links, thus demonstrating that the proposed DDBD method is an effective tool for seismic design of EBFs.