Confinement effects on glass forming liquids probed by DMA

Many molecular glass forming liquids show a shift of the glass transition T-g to lower temperatures when the liquid is confined into mesoporous host matrices. Two contrary explanations for this effect are given in literature: First, confinement induced acceleration of the dynamics of the molecules leads to an effective downshift of T-g increasing with decreasing pore size. Second, due to thermal mismatch between the liquid and the surrounding host matrix, negative pressure develops inside the pores with decreasing temperature, which also shifts T-g to lower temperatures. Here we present dynamic mechanical analysis measurements of the glass forming liquid salol in Vycor and Gelsil with pore sizes of d=2.6, 5.0 and 7.5 nm. The dynamic complex elastic susceptibility data can be consistently described with the assumption of two relaxation processes inside the pores: A surface induced slowed down relaxation due to interaction with rough pore interfaces and a second relaxation within the core of the pores. This core relaxation time is reduced with decreasing pore size d, leading to a downshift of T-g proportional to 1/d in perfect agreement with recent differential scanning calorimetry (DSC) measurements. Thermal expansion measurements of empty and salol filled mesoporous samples revealed that the contribution of negative pressure to the downshift of T-g is small (<30%) and the main effect is due to the suppression of dynamically correlated regions of size xi when the pore size xi approaches

The impacts of foot and mouth disease on a peripheral tourism area: the role and effect of crisis management.

This study reports on the consequences of endemic cattle and sheep disease (2001) on two separate areas on the tourist industry; (a) the Grampian Region of Scotland (indirectly affected) and (b) Cumbria in England (directly affected), and secondly on the effects of various crisis management strategies to alleviate the ensuing problems in both areas. Data were collected by a survey of a sample of 200 tourism orientated SME operators in Grampian and 170 businesses in Cumbria. The results show two forms of impact caused by the disease, direct and those less obvious or tangible. Direct impact was the dramatic loss of trade, most dramatically experienced by the lack of tourists visiting the areas. Indirect effects included loss of supply, change to the product offered and cuts in future investment. In the combination of these impacts, it was clear that the effects would have longevity far beyond the period of the actual crisis. Although the actual presence of the disease was geographically limited in Grampian, the consequences rippled out to affect areas that had no direct connection. In Cumbria, the effects were only slightly more severe but the response more direct and initially effective. Significantly the data also demonstrated a perception of minimal effort by the government to limit the consequences to the farming industry especially in Grampian. We conclude that the tourist industry in peripheral regions is fragile and highly vulnerable to any external shocks. However, we also note the ability of small rural firms to respond to such catastrophes and to avert the worst impacts of crisis

Breaking bad, making good: notes on a televisual tourist industry

This article explores emerging intersections between the consumption of mediated popular culture and the real and imagined topographies within which those representations are framed. Through an examination of the ‘televisual tourism’ centred around the successful TV series Breaking Bad, we scrutinise the multiple modes of sensorial and embodied travel experience enjoyed by fans of the show as they consume their way around the show’s sites, scenes, and tastes in the city of Albuquerque . This exploitation of media textuality through fan tourism is, we suggest, centred upon a carefully managed commodification of crime, criminality and transgression