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Publications

Publications by Rui Moreira

2014

A graph-based approach for interference free integration of commercial off-the-shelf elements in pervasive computing systems

Authors
Soares, C; Moreira, RS; Morla, R; Torres, J; Sobral, P;

Publication
FUTURE GENERATION COMPUTER SYSTEMS-THE INTERNATIONAL JOURNAL OF GRID COMPUTING AND ESCIENCE

Abstract
Commercial off-the-shelf devices and applications are expected to be pivotal in the coming massive deployment of pervasive computing technology in home settings. The integration of these devices and applications in the same household may result in unplanned interactions involving users and entertainment, communication, and health-related devices and applications. These unplanned interactions are a serious concern when, for example, communication or entertainment applications interfere with the behavior of health-related devices. This paper presents a novel graph-based approach for representing the expected behavior of commercial off-the-shelf devices and applications, their interactions, and for detecting interference in pervasive computing systems. A set of home care scenarios is used to assess the applicability of this approach. We then provide two setups where this approach can be applied: (i) in a pre-deployment setup, where simulation is used to detect possible instances of interference, and (ii) at run-time, collecting observations from devices and applications and detecting interference as it occurs. For pre-deployment and simulation we use Opensim to recreate a home household. For run-time, we use Simple Network Management Protocol for systems state introspection and a sliding window mechanism to process the collected data-stream. Crown Copyright

2016

A behavioral reflective architecture for managing the integration of personal ubicomp systems: automatic SNMP-based discovery and management of behavior context in smart-spaces

Authors
Moreira, RS; Morla, RS; Moreira, LPC; Soares, C;

Publication
PERSONAL AND UBIQUITOUS COMPUTING

Abstract
Context-aware ubiquitous computing systems should be able to introspect the surrounding environment and adapt their behavior according to other existing systems and context changes. Although numerous ubiquitous computing systems have been developed that are aware of different types of context such as location, social situation, and available computational resources, few are aware of their computational behavior. Computational behavior introspection is common in reflective systems and can be used to improve the awareness and autonomy of ubicomp systems. In this paper, we propose a decentralized approach based on Simple Network Management Protocol (SNMP) and Universal Plug and Play (UPnP), and on state transition models to model and expose computational behavior. Typically, SNMP and UPnP are targeted to retrieve raw operational variables from managed network devices and consumer electronic devices, e.g., checking network interface bandwidth and automating device discovery and plug and play operations. We extend the use of these protocols by exposing the state of different ubicomp systems and associated state transitions statistics. This computational behavior may be collected locally or remotely from ubicomp systems that share a physical environment, and sent to a coordinator node or simply shared among ubicomp systems. We describe the implementation of this behavior awareness approach in a home health-care environment equipped with a VoIP Phone and a drug dispenser. We provide the means for exposing and using the behavior context in managing a simple home health-care setting. Our approach relies on a system state specification being provided by manufacturers. In the case where the specification is not provided, we show how it can be automatically discovered. We propose two machine learning approaches for automatic behavior discovery and evaluate them by determining the expected state graphs of our two systems (a VoIP Phone and a drug dispenser). These two approaches are also evaluated regarding the effectiveness of generated behavior graphs.

2013

LoCoBoard: Low-Cost Interactive Whiteboard Using Computer Vision Algorithms

Authors
Soares, C; Moreira, RS; Torres, JM; Sobral, P;

Publication
ISRN Machine Vision

Abstract

2011

A Reflective Framework for Adapting Video-on-Demand over Distributed Environments

Authors
Daniel Oancea; Rui Moreira; João Correia Lopes

Publication
NIME 2011 - 11th International Conference on New Interfaces for Musical Expression, Oslo, Norway

Abstract

2012

Graph-based Approach for Interference Free Integration of Pervasive Applications

Authors
Christophe Soares; Rui Moreira; Ricardo Morla; José Manuel Torres; Pedro Sobral

Publication
ISWPC 2012 - 7th International Symposium on Wireless Pervasive Computing, Dalian, China

Abstract

2011

A 3D Simulation Framework for Safe Ambient-Assisted Home Care

Authors
Carlos Velasquez; Christophe Soares; Ricardo Morla; Rui Moreira; José Manuel Torres; Pedro Sobral

Publication
UBICOMM 2011 - The Fifth International Conference on Mobile Ubiquitous Computing, Systems, Services and Technologies, Lisboa, Portugal

Abstract

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