Rafael j fern ndez moctezuma
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Rafael J. Fernández-Moctezuma. 3 rd year Ph.D. Student in Computer Science Areas of Interest Data Stream Management Systems Intelligent Transportation Systems Thesis Topic: Inter-operator feedback, bounded execution guarantees. Data Stream Management Systems.

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Rafael J. Fernández-Moctezuma

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Rafael j fern ndez moctezuma

Rafael J. Fernández-Moctezuma

  • 3rd year Ph.D. Student in Computer Science

  • Areas of Interest

    • Data Stream Management Systems

    • Intelligent Transportation Systems

  • Thesis Topic: Inter-operator feedback, bounded execution guarantees

Rafael J. Fernández-Moctezuma


Data stream management systems

Data Stream Management Systems

  • Deal efficiently with high-volumes of incoming data

  • Traffic Data  CS theory

    • Inter-Operator Feedback

    • Guarantees on Bounded Stream Query Execution

      Work with Prof. Maier, and Prof. Tufte

PACE

IMPUTE

σC

σ¬C

DUPLICATE

Rafael J. Fernández-Moctezuma

(b) Localized Adaptation

(a) Centralized Adaptation


On line imputation strategies

On-Line Imputation Strategies

  • Big picture: Adapt to incoming data characteristics to perform near real-time imputation

  • Looked at diverse strategies, not all amicable for low latency processing

  • Spatial and Temporal models, some heuristic, some statistical.

    Work with Prof. Bertini, Prof. Maier, and Prof. Tufte

Rafael J. Fernández-Moctezuma


Bottleneck identification

Bottleneck Identification

  • Work toward automatic bottleneck detection

  • “Living history” of Portland Bottlenecks

  • Can process one year of data per corridor in one day (commodity PC)

    Work with Prof. Bertini, JerzyWieczorek, Huan Li

Rafael J. Fernández-Moctezuma


Optimal sensor placement

Optimal Sensor Placement

  • Where do we position loop detectors to better operate the freeway infrastructure?

  • Challenges: What’s “better”? Optimal ramp metering? Better travel time estimations? Early bottleneck detection?

  • Recently focused on Linear Programming approach for early bottleneck detection

    Work with Prof. Figliozzi, Prof. Bertini

Rafael J. Fernández-Moctezuma


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