4 research outputs found

    Maintainer perspectives on data-driven transport asset management and the future role of the Internet-of-Things

    Get PDF
    In this paper we present fieldwork findings from engagements with a cooperative group of strategic and operations transport maintainers, responsible for the maintenance of drainage infrastructure to mitigate the risk and impact of flooding on the network. Through transport maintainer perspectives from rail and highways sectors, we focus on developing an understanding of work-practices in the context of transport surface-water management, and how the recent acceleration towards ā€˜data-drivenā€™ technologies in support of maintenance intervention decision-making (i.e. the work of coordinating the cleaning of drainage) is integrated and impacting on current work-practice. Furthermore, we document and consider how maintainers perceive the potential role of the Internet-of-Things (IoT) and highlight emerging opportunities and tensions that may arise ahead of its future design and implementation

    Grafo de relaƧƵes : uma metodologia para coordenar dependencias entre atividades em ambientes computacionais

    Get PDF
    Orientadores: Leo Pini MagalhĆ£es, Alberto Barbosa RaposoTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de ComputaĆ§Ć£oResumo: Um dos desafios relacionados Ć  coordenaĆ§Ć£o em ambientes computacionais Ć© a geraĆ§Ć£o de estruturas para equacionar possĆ­veis conflitos decorrentes de relacionamentos de dependĆŖncias entre as atividades deste ambiente. Este trabalho apresenta uma metodologia para automatizar a geraĆ§Ć£o de mecanismos de coordenaĆ§Ć£o em ambientes computacionais. Estes mecanismos sĆ£o gerados a partir dos comportamentos temporais especificados para as atividades executadas no ambiente. Permite-se especificar comportamentos temporais alternativos e atividades alternativas, os quais podem ser selecionados em tempo de processamento mudando assim as relaƧƵes temporais entre as atividades e/ou as atividades que participam destes comportamentos. O algoritmo proposto para este fim implementa uma polĆ­tica de coordenaĆ§Ć£o global permitindo-se que a execuĆ§Ć£o de uma atividade aconteƧa somente quando nĆ£o violar qualquer restriĆ§Ć£o temporal do ambiente. A identificaĆ§Ć£o e modelagem das restriƧƵes temporais que cada atividade deve atender resultam no mecanismo de coordenaĆ§Ć£o, obtido em tempo linear no nĆŗmero de atividades. Exploram-se as capacidades de encapsulamento e compactaĆ§Ć£o das redes de Petri coloridas na modelagem dos mecanismos de coordenaĆ§Ć£o sem vincular o uso da metodologia a um conhecimento prĆ©vio deste sistema formal (redes de Petri coloridas)Abstract: One of the challenges related to the coordination of computational environments is the generation of structures to address possible conflicts related to dependences among the activities of these environments. This work presents a methodology to automate the generation of coordination mechanisms for computational environments. These mechanisms are generated from the temporal behaviors specified for the activities executed in the environment. It is possible to specify alternative temporal behaviors and alternative activities, which can be selected in processing time changing temporal relationships among the activities and/or the activities that participate in these behaviors. The algorithm proposed for this implements a global coordination policy, allowing that the execution of an activity only occurs when this doesn't violate any temporal restriction of the environment. The identification and modeling of the temporal restrictions that each activity should satisfy result in the coordination mechanism, obtained in linear time in the number of activities. The modular and compacting capacities of colored Petri nets are explored in the modeling of the coordination mechanisms without connecting the use of the methodology to a previous knowledge of this formal system (colored Petri nets)DoutoradoEngenharia de ComputaĆ§Ć£oDoutor em Engenharia ElĆ©tric

    Taking the Distributed Nature of Cooperative Work Seriously

    No full text
    and evolve through a process of local adaptations. The challenge is thus to provide a CSCW environment which supports the construction and use of computational coordination mechanisms which are robust in view of the distributed nature of cooperative work
    corecore