City regions and polycentricity: the East Midlands urban network

The aims of this paper were to clarify the meaning of the terms city region and polycentricy and to then examine evidence on urban centres in the East Midlands to see how far these terms describe the present configuration of the region

The reality paradox: Authenticity, fidelity, and the real in Battlefield 4

This article examines how the ‘Battlefield’ (EA Games) series of games generates authenticity in its soundtrack both through a meticulous approach to modelling the physical world and through the appropriation of audio characteristics from our, typically mediated, experience of conflict. It goes on to examine how we might reconcile such ‘authentic’ audio with the more ludic features of the soundtrack, required to support gameplay, that are typically presented as inauthentic. The absence of these sounds during narrative-based sequences and the acceptance of them without negative impact on immersion during gameplay implies that these inauthentic sounds appear not to disrupt the immersive qualities of the ‘authentic’ but only when clearly positioned as ego-ludic (heard only by the player, non-spatialized and synthetic in quality) and only within the context of challenge-based sequences of the game

Constant amplitude and post-overload fatigue crack growth behavior in PM aluminum alloy AA 8009

A recently developed, rapidly solidified, powder metallurgy, dispersion strengthened aluminum alloy, AA 8009, was fatigue tested at room temperature in lab air. Constant amplitude/constant delta kappa and single spike overload conditions were examined. High fatigue crack growth rates and low crack closure levels compared to typical ingot metallurgy aluminum alloys were observed. It was proposed that minimal crack roughness, crack path deflection, and limited slip reversibility, resulting from ultra-fine microstructure, were responsible for the relatively poor da/dN-delta kappa performance of AA 8009 as compared to that of typical IM aluminum alloys

Problem formulation in the environmental risk assessment for genetically modified plants

Problem formulation is the first step in environmental risk assessment (ERA) where policy goals, scope, assessment endpoints, and methodology are distilled to an explicitly stated problem and approach for analysis. The consistency and utility of ERAs for genetically modified (GM) plants can be improved through rigorous problem formulation (PF), producing an analysis plan that describes relevant exposure scenarios and the potential consequences of these scenarios. A properly executed PF assures the relevance of ERA outcomes for decision-making. Adopting a harmonized approach to problem formulation should bring about greater uniformity in the ERA process for GM plants among regulatory regimes globally. This paper is the product of an international expert group convened by the International Life Sciences Institute (ILSI) Research Foundation

Are You Seeing What I'm Seeing? An Eye-Tracking Evaluation of Dynamic Scenes

Based on the data from the 2006/7 multimedia exhibition, RePossessed, during which over 400 members of the public watched scenes from Hitchcock's Vertigo, this paper describes the basis of an approach to the use of eye-tracking techniques, visualisations, and metrics to measure the influence of directorial techniques on film viewers' experience. Used as part of a repertoire of tools, the visualisation and quantitative evaluation of eye movement data can provide an intuitive and accessible approach to the evaluation of moving image based media and allow the conventions, assumptions and intuitive practices of film-making to be examined

Assessing the ecological risks from the persistence and spread of feral populations of insect-resistant transgenic maize

One source of potential harm from the cultivation of transgenic crops is their dispersal, persistence and spread in non-agricultural land. Ecological damage may result from such spread if the abundance of valued species is reduced. The ability of a plant to spread in non-agricultural habitats is called its invasiveness potential. The risks posed by the invasiveness potential of transgenic crops are assessed by comparing in agronomic field trials the phenotypes of the crops with the phenotypes of genetically similar non-transgenic crops known to have low invasiveness potential. If the transgenic and non-transgenic crops are similar in traits believed to control invasiveness potential, it may be concluded that the transgenic crop has low invasiveness potential and poses negligible ecological risk via persistence and spread in non-agricultural habitats. If the phenotype of the transgenic crop is outside the range of the non-transgenic comparators for the traits controlling invasiveness potential, or if the comparative approach is regarded as inadequate for reasons of risk perception or risk communication, experiments that simulate the dispersal of the crop into non-agricultural habitats may be necessary. We describe such an experiment for several commercial insect-resistant transgenic maize events in conditions similar to those found in maize-growing regions of Mexico. As expected from comparative risk assessments, the transgenic maize was found to behave similarly to non-transgenic maize and to be non-invasive. The value of this experiment in assessing and communicating the negligible ecological risk posed by the low invasiveness potential of insect-resistant transgenic maize in Mexico is discussed