1,417 research outputs found

    The interaction between institutional and stakeholder pressures: Advancing a framework for categorising carbon disclosure strategies

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    Multiple institutional and stakeholder demands have led to different strategies in the measurement and disclosure of Carbon-related information. Although scholars acknowledge the prevalence of competing institutional logics as being a driver of different outcomes, existing research offers conflicting views on their implications, thus lacking clarity. In response, this paper proposes two frameworks (a) to clarify the institutional and stakeholder influences on carbon disclosure and (b) to depict four different types of carbon disclosure strategies to assess a company's "true" carbon position. We identify various concepts of institutional fields, organisations, and stakeholders that influence disclosure and combine the two critical concepts of logic centrality and stakeholder salience to categorise the multiple institutional and stakeholder pressures on carbon disclosure. Whereas the first framework proposes that institutional theory and stakeholder theory both provide, on different levels, a theoretical foundation to examine the influences on carbon disclosure, the second model categorises carbon disclosure outcomes in terms of logic centrality and stakeholder salience. Both frameworks advance the understanding of the interaction between firm-level agency and field-level pressures and synthesise the current literature to offer conceptual clarity regarding the varied implications and outcomes linked to carbon disclosure practices and strategies

    Silicon Drift Detector Readout Electronics for a Compton Camera

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    A prototype detector for Compton camera imaging is under development. A monolithic array of 19 channel Silicon drift detector with on-chip electronics is going to be used as a scatter detector for the prototype system. Custom designed analog and digital readout electronics for this detector was first tested by using a single cell Silicon drift detector. This paper describes the readout architecture and presents the results of the measurement.Comment: 10 pages, 9 figures, submitted to Nucl. Instr. Meth.

    I'd hide you: performing live broadcasting in public

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    We present a study of a mixed reality game called 'I'd Hide You' that involves live video streaming from the city streets. We chart the significant challenges facing performers on the streets who must simultaneously engage in the game, stream compelling video footage featuring themselves, and interact with a remote online audience. We reveal how these street performers manage four key tensions: between their body and camera; between the demands of online audiences and what takes place on-the-street; between what appears 'frontstage' on camera versus what happens 'backstage'; and balancing being a player of the game with being a performer. By reflecting on how they achieve this, we are able to draw out wider lessons for future interfaces aimed at supporting people broadcasting video of themselves to online audiences while engaged in games, sports and other demanding real-world activities

    Bathymetric Artifacts in Sea Beam Data: How to Recognize Them and What Causes Them

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    Sea Beam multibeam bathymetric data have greatly advanced understanding of the deep seafloor. However, several types of bathymetric artifacts have been identified in Sea Beam\u27s contoured output. Surveys with many overlapping swaths and digital recording on magnetic tape of Sea Beam\u27s 16 acoustic returns made it possible to evaluate actual system performance. The artifacts are not due to the contouring algorithm used. Rather, they result from errors in echo detection and processing. These errors are due to internal factors such as side lobe interference, bottom-tracking gate malfunctions, or external interference from other sound sources (e.g., 3.5 kHz echo sounders or seismic sound sources). Although many artifacts are obviously spurious and would be disregarded, some (particularly the omega effects described in this paper) are more subtle and could mislead the unwary observer. Artifacts observed could be mistaken for volcanic constructs, abyssal hill trends, hydrothermal mounds, slump blocks, or channels and could seriously affect volcanic, tectonic, or sedimentological interpretations. Misinterpretation of these artifacts may result in positioning errors when seafloor bathymetry is used to navigate the ship. Considering these possible geological misinterpretations, a clear understanding of the Sea Beam system\u27s capabilities and limitations is deemed essential

    Methods for improving the accuracy of automated NDE systems

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    Automated inspection systems using twin six-axis industrial robots have been available for a number of years, including the IntACom system at TWI Wales. Utilising phased array ultrasonic probes to quickly inspect complex geometries, the IntACom system is now routinely used in various inspections of composite components. In the present work we introduce a number of methods for improving and quantifying the accuracy of an automated inspection system. The key challenges are identified and addressed through a number of methods including calibration procedures and interfacing multiple sensors with industrial robots for Non Destructive Evaluation (NDE) purposes. The authors also introduce a novel method for improving the Tool Centre Point (TCP) calibration of an industrial robot when the tool is an ultrasonic phased array probe. Experimental trials show that the average positioning error is less than 0.5mm using this new method

    The error of our ways: the experience of self-reported position in a location-based game

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    We present a study of people’s use of positional information as part of a collaborative location-based game. The game exploits self-reported positioning in which mobile players manually reveal their positions to remote players by manipulating electronic maps. Analysis of players’ movements, position reports and communications, drawing on video data, system logs and player feedback, highlights some of the ways in which humans generate, communicate and interpret position reports. It appears that remote participants are largely untroubled by the relatively high positional error associated with self reports. Our analysis suggests that this may because mobile players declare themselves to be in plausible locations such as at common landmarks, ahead of themselves on their current trajectory (stating their intent) or behind themselves (confirming previously visited locations). These observations raise new requirements for the future development of automated positioning systems and also suggest that selfreported positioning may be a useful fallback when automated systems are unavailable or too unreliable
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