Research

Analytical, simulation and stochastic models to study problems in Distributed Systems, Performance Evaluation, Cognitive Systems, AI Planning & Operations Research.

Cognitive/Autonomous Systems

• Cognitive Robotics:
  • Knowledge Based Hierarchical Decomposition of Robotic Action Plans, IEEE IECON, 2018.
  • RoboPlanner: Robotic Action Planning via Knowledge Graph Queries, ACM SAC, 2019.
• Automated Planning:
  • Towards Automated Planning and Adaptation in Intelligent Robotics (under submission).

Industrial Automation

• Industry 4.0 Workflows:
  • Structured Performance Analysis of Industry 4.0 Workflow Resource Paatterns, ACM ICPE, 2019.
  • Workflow Composition and Analysis in Industry 4.0 Automation, IEEE RTSS, 2017.
  • Distributed Optimization in Multi Agent Warehouse Automation, ACM SAC, 2018.
• Fog/Edge Computing:
  • A-Priori Estimation of Computation Times in Fog Networked Robotics, IEEE Edge, 2017.
  • Resource Constrained Offloading in Fog Computing, ACM Middleware, 2016.

Performance Modeling

• Service Demand Modeling:
  • Service demand modeling and performance prediction with single-user tests, Elsevier Performance Evaluation, 2017.
  • Model Driven Software Performance Engineering: Current Challenges and Way Ahead, ACM Sigmetrics, 2016.
  • Performance modeling of multi-tiered web applications with varying service demands, IEEE IPDPS, 2015.

Distributed Systems and Middleware

• Heterogeneous Middleware Interactions:
  • Analysis of timing constraints in heterogeneous middleware interactions, ICSOC, 2015.
  • QoS analysis in heterogeneous choreography interactions, ICSOC, 2013.
• QoS Management of Web Services Orchestrations/Choreographies:
  • QoS-aware management of monotonic service orchestrations, FMSD, 2014.
  • QoS composition and analysis in reconfigurable web services choreographies, IEEE ICWS, 2013.
  • Flexible Quality of Service Management of Web Services Orchestrations, PhD Thesis, Inria, 2012.
  • Optimizing decisions in web services orchestrations, ICSOC, 2011.

Communication Systems

• Cognitive Radio Spectrum Sensing:
  • Data and decision fusion for distributed spectrum sensing in cognitive radio networks, IEEE ICICS, 2007.
• Blind Source Separation for Communication Signals:
  • Blind source separation algorithms for mitigating co-channel interference and noise in wireless communication systems, NTU Thesis, 2009.
  • FebICA: Feedback Independent Component Analysis for Complex Domain Source Separation of Communication Signals, Book Chapter, 2014.
  • High Fidelity Blind Source Separation of Speech Signals, EUSIPCO, 2009.