O'Hare, G. M. P. (Greg M. P.)
O'Hare, G. M. P. (Greg M. P.)
O'Hare, G. M. P. (Greg M. P.)
Now showing 1 - 10 of 180
- PublicationIntegrated modelling of urban, rural and coastal domains for bathing water quality prediction – Smart Coasts and Acclimatize ProjectsThis paper presents the results of the Interreg funded SMARTCOASTS project in which an integrated catchment (MIKE11) and coastal (MIKE21 and MIKE3) modelling tool was developed for predicting the bathing water quality, at Bray, Co. Wicklow, on the east coast of Ireland. The Bray bathing waters had historically been prone to episodic short-term pollution, caused primarily by rainfall related catchment run-off. Accounting fully for the complexity of the pollution inputs for water quality prediction in the system required an integrated modelling approach. The approach for integrating the individual component models (NAM, MIKE 11, and MIKE 3 FM) was simple but efficient. The component models, interfaced to the core of the forecasting system, were run sequentially, i.e. in the form of a cascade with the forcing of each downstream model being the result of the model upstream of it. Rainfall (both forecasted and measured) drives the hydrological processes in the NAM model, which produces runoff that generates sub-catchment inflows into the river network. The output from NAM serves as the input to the MIKE 11 model which routes the flow and water quality variables in the river network and transports them to the coastal waters. Finally, the MIKE 3 FM coastal model uses flow and water quality outputs from MIKE 11, together with tidal and meteorological data, to simulate the current flow, transport and fate of water quality variables in the marine environment. Models were calibrated using measured data. Adjustment of the tidal constituents of the MIKE global model resulted in a markedly improved fit to measured water levels at five reference tidal gauges, used for calibration. Bottom friction was calibrated to produce good correlations of measured and simulated current speed and direction. When applied to water quality prediction, results of the transport model showed that the model adequately replicated measurements of E.coli and Intestinal Enterococci within the coastal domain. Computational simulations of bathing water quality are not without difficulty and a significant challenge in this work involved incorporating real-time meteorological data from a sensor network within the catchment into the model predictions. The work of Smart Coasts is currently being built on in the Interreg funded Acclimatize project. Acclimatize is focussing on the bathing waters of Dublin Bay and involves the development of a modelling platform that will facilitate a longer-term assessment of the likely pressures on bathing water quality in the context of a changed climate.
- PublicationMobile BDI AgentsMuch work has been done in the area of Mobile Agents. However, the majority of this research has emphasized "mobile" and largely ignored "agent". This paper attempts to rectify this through the presentation of research that combines the areas of Intentional Agents and Mobility, namely the construction of Mobile BDI Agents.
- PublicationImplicit interaction : a prerequisite for practical AmIIntelligent User Interfaces represent one of the three distinguishing characteristics of AmI environments. Such interfaces are envisaged as mediating between the services available in an arbitrary physical environment and its inhabitants. To be effective, such interfaces must operate in both proactive and passive contexts, implicitly and explicitly anticipating and responding to user requests. In either case, an awareness of the prevailing situation is essential – a process that demands a judicious combination of data and decision fusion, as well as collaborative and centralized decision making. Given the constraints of AmI environments realizing a distributed lightweight computational infrastructure augmented with a need to address user needs in a timely manner poses significant challenges. In this paper, various issues essential to enabling seamless, intuitive and instinctive interaction in AmI environments are explored.
- PublicationFeline : A Case Study in the Design and Implementation of a Co-operating Expert SystemThere has recently been considerable international interest in the possibility of building second generation expert systems as groups of co-operating problem solvers. In this paper we relate our experiences with such a system. FELINE is a co-operating expert system composed of five autonomous intelligent agents. These agents co-operate through communication to identify the causes of anaemia in cats. The paper addresses three key issues: development methodologies for building co-operating expert systems, making expert systems co-operative, and inter-agent problem solving techniques. We propose a tentative development methodology for co-operating expert systems and describe how it was applied in FELINE. We also present a detailed, domain independent account of the inter-agent problem solving paradigm devised for use in FELINE. We conclude with a brief critical assessment of our work.
- PublicationDecision-making of BDI agents, a fuzzy approachThis paper introduces and proposes agent fuzzy decision-making (AFDM), as an extension to the classical belief-desire-intention (BDI) model. AFDM addresses the limitations of present formalisms within BDI models by making decisions based on quantified fuzzy judgment. The AFDM matrix model enables quantitative calculation and thus, provides a more practical solution to BDI models. In addition, more flexible and controllable solutions to BDI persistence can be expected with the introduction of AFDM.
- PublicationGarment-based body sensing using foam sensorsWearable technology is omnipresent to the user. Thus, it has the potential to be significantly disruptive to the user’s daily life. Context awareness and intuitive device interfaces can help to minimize this disruption, but only when the sensing technology itself is not physically intrusive: i.e., when the interface preserves the user’s homeostatic comfort. This work evaluates a novel foambased sensor for use in body-monitoring for contextaware and gestural interfaces. The sensor is particularly attractive for wearable interfaces due to its positive wearability characteristics (softness, pliability, washability), but less precise than other similar sensors. The sensor is applied in the garment-based monitoring of breathing, shoulder lift (shrug), and directional arm movement, and its accuracy is evaluated in each application. We find the foam technology most successful in detecting the presence of movement events using a single sensor, and less successful in measuring precise, relative movements from the coordinated responses of multiple sensors. The implications of these results are considered from a wearable computing perspective.
- PublicationExercise in the smart workplaceEmployees that engage in even moderate amounts of exercise during their working day suffer less from stress and are more tolerant in the various irritations that accompany normal working life. Though it cannot be said with certainty that such workers are more productive, tentative evidence suggest that this may well be the case. A useful service of a smart office or work environment is to contribute to the health and well-being of those that inhabit such spaces. One practical approach to this is to monitor the exercise that employees engage in during the day, and using this as a basis, motivate them to engage in further physical activity. In this paper, issues relating to monitoring employee physical activity are explored.
- PublicationSensor fusion for social roboticsThis paper advocates the application of sensor fusion for the visualisation of social robotic behaviour. Experiments with the Virtual Reality Workbench integrate the key elements of Virtual Reality and robotics in a coherent and systematic manner. The deliberative focusing of attention and sensor fusion between vision systems and sonar sensors is implemented on autonomous mobile robots functioning in standard office environments
- PublicationWhat is a social robot?This paper discusses the concept of a social robot. Developing from recent work on physical embodiment, the necessity for a socially embodied robot is presented. Current work via the Social Robot Architecture seeks to develop and demonstrate these concepts.
- PublicationThe social robot architecture: towards sociality in a real world domainThis paper advocates the application of multi-agent techniques in the realisation of social robotic behaviour. We present an architecture which commissions agent-based deliberation without sacrificing the reactive qualities necessary in a real world domain, and which is situated within a social landscape through the use of an Agent Communication Language.