Alexandros Zenonos, Ph.D.

Alexandros Zenonos, Ph.D.

London, England, United Kingdom
12K followers 500+ connections

About

I am an AI researcher and Senior Data Scientist, interested in solving real-world…

Articles by Alexandros

  • Building a (statistical) time machine

    Building a (statistical) time machine

    By Alexandros Zenonos and Josh Spear, KPMG Data Scientists Imagine this: you’re a C-suite executive at a well-known…

    8 Comments

Contributions

Activity

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Experience

  • Roche Graphic

    Roche

    Welwyn Garden City, England, United Kingdom

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    London, England, United Kingdom

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    London, United Kingdom

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    London, United Kingdom

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    London, United Kingdom

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    United Kingdom

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    Southampton, United Kingdom

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    Bristol, United Kingdom

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    UCL-Malet Place

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    Cyprus

Education

  • Imperial College London Graphic

    Imperial College London

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    • Modules: Machine Learning, Machine Learning and Neural Computation, Intelligent Data and Probabilistic Inference, Computational Neurodynamics, Computer Vision, Multi-agent Systems, Knowledge Representation, Distributed Algorithms, Software Engineering for Industries
    • Summer Project: Unsupervised Learning Approaches to Intention Recognition (Grade: 78%)

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    Research Topic: Coordinating measurements for environmental monitoring in uncertain participatory sensing settings
    Research Group: Agents, Interaction and Complexity (Agents Research Group)
    Supervisors: Prof. Nicholas R. Jennings (h-index:134) and Dr. Sebastian Stein
    Project Name: ORCHID

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    Activities and Societies: 2010-2011 UCLU Cypriot Society Sports Officer

    • Final Year Modules: Operating Systems, Computational Complexity, Networked Systems, Database and Information Management Systems, Technology Management and Professional Issues
    • Final Year Individual Project: Hack into smokers’ behaviour: An investigation of smoking behaviour and promotion of behaviour change (Grade: 74%)
    • Final Year Group Project: SocialSTREAM (Grade: 75%)

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Licenses & Certifications

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Publications

  • Coordinating Measurements in Uncertain Participatory Sensing Settings

    Journal of Artificial Intelligence Research (JAIR)

    Environmental monitoring allows authorities to understand the impact of potentially harmful phenomena, such as air pollution, excessive noise, and radiation. Recently, there has been considerable interest in participatory sensing as a paradigm for such large-scale data collection because it is cost-effective and able to capture more fine-grained data than traditional approaches that use stationary sensors scattered in cities. In this approach, ordinary citizens (non-expert contributors) collect…

    Environmental monitoring allows authorities to understand the impact of potentially harmful phenomena, such as air pollution, excessive noise, and radiation. Recently, there has been considerable interest in participatory sensing as a paradigm for such large-scale data collection because it is cost-effective and able to capture more fine-grained data than traditional approaches that use stationary sensors scattered in cities. In this approach, ordinary citizens (non-expert contributors) collect environmental data using low-cost mobile devices. However, these participants are generally self-interested actors that have their own goals and make local decisions about when and where to take measurements. This can lead to highly inefficient outcomes, where observations are either taken redundantly or do not provide sufficient information about key areas of interest. To address these challenges, it is necessary to guide and to coordinate participants, so they take measurements when it is most informative. To this end, we develop a computationally-efficient coordination algorithm (adaptive Best-Match) that suggests to users when and where to take measurements. Our algorithm exploits probabilistic knowledge of human mobility patterns, but explicitly considers the uncertainty of these patterns and the potential unwillingness of people to take measurements when requested to do so. In particular, our algorithm uses a local search technique, clustering and random simulations to map participants to measurements that need to be taken in space and time. We empirically evaluate our algorithm on a real-world human mobility and air quality dataset and show that it outperforms the current state of the art by up to 24% in terms of utility gained.

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  • A trust-based coordination system for participatory sensing applications

    At 5th AAAI Conference on Human Computation and Crowdsourcing (HCOMP17)

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  • HealthyOffice: Mood Recognition At Work Using Smartphones and Wearable Sensors.

    In Pervasive Computing and Communications Workshops (PERCOM Workshops), 2016 IEEE International Conference on, March 2016

    We explore the possibility of using wearable devices for mood recognition in work environments. We propose a novel mood recognition framework that is able to identify five intensity levels for eight different types of moods. We evaluate our system in a small-scale user study where wearable sensing data is collected in an office environment.

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  • An Algorithm to Coordinate Measurements using Stochastic Human Mobility Patterns in Large-Scale Participatory Sensing Settings.

    Thirtieth AAAI Conference on Artificial Intelligence (AAAI-16)

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  • Coordinating Measurements for Air Pollution Monitoring in Participatory Sensing Settings.

    In, 14th Int. Conference on Autonomous Agents and Multi-Agent Systems, Istanbul, TR, 04 - 08 May 2015.

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Courses

  • Computational Neurodynamics

    421

  • Computer Vision

    418

  • Distributed Algorithms

    437

  • Intelligent Data and Probabilistic Inference

    493

  • Knowledge Representation

    491

  • Machine Learning

    395

  • Machine Learning and Neural Computation

    424

  • Multi-agent Systems

    474

  • Software Engineering for Industries

    475

Languages

  • Greek

    Native or bilingual proficiency

  • English

    Full professional proficiency

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