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This page contains information related to my work throughout since 2004. In particular, I try to provide details regarding my involvement in various R&D projects and efforts. Each project is briefly presented and then I try to swiftly present my involvement through videos, papers and presentations where possible. This section is divided into two parts, namely Industry and EU R&D projects


Industry

The last couple of years I am working as a Senior Data Scientist in Intracom Telecom S.A. During the same period I have collaborated in parallel as an External Advisor with promising start-ups as well as my former employer, the University of Athens. Here, I will attempt to provide a short overview of the results of these collaborations.

Collaborating with University of Athens and Huawei Technologies Co. Ltd.

For two years I participated in a research effort performed in the context of a private research contract between Huawei Technologies Co., Ltd and the University of Athens. My work focused on the design, implementation and experimental assessment of a knowledge discovery framework for future 5G mobile communication systems. In particular, I designed a recommendation engine facilitating network selection based on user habits and network conditions. The engine facilitated optimal network selection based on user historic information as well as the extraction of a rules set catering for network resource usage optimization. Finally, a feedback mechanism focusing on the periodic evaluation of the rules set and the derived user classes was also designed.

More details can be found in the following paper:

Collaborating with Intelen Inc

While collaborating with Intelen Inc I focused on the design, implementation and experimental assessment of novel methods for knowledge discovery from energy consumption data. In particular, my work evolved around three axes; specifically:

  • Data preprocessing by means of dimensionality reduction in order to manage inherent problems associated with observations that are described by a large number of features.
  • Unsupervised methods for user and building profiling in order to facilitate the reduction of energy consumption by end-use customers.
  • Optimization of the context monitoring process in order to dynamically and autonomously adapt the sampling rate of the monitoring procedure user habits.
More details can be found in the following two articles:

Collaborating with Trebbble Co

In Trebbble I delivered a series of seminar courses on the field of Data Mining, Machine Learning and its application on the mobile ecosystem. The course was divided into three parts, namely introductory, predictive modelling and applied experimentation. Particular focus was given on the management of voluminous, high dimensional datasets. Text mining was used as a motivating example showcasing the mapping of input data to high dimensional vector spaces and the subsequent application of feature selection and feature extraction methods in order to minimize noise in the dataset and unveil latent information patterns. Finally, trainees applied the knowledge they gained on simple realistic scenarios using open-source software.


R&D Projects

From 2004 until 2013 I worked as a Research Associate in the SCAN research group of the University of Athens in the context of several, highly impacting, European research projects (FP6 and FP7) undertaking technical as well as managerial duties. In the following I provide details regarding my work in their context. You can use the following links in order to navigate:

Live Video-to-Video Supporting Interactive City Infrastructure

LiveCity (Live Video-to-Video Supporting Interactive City Infrastructure) was a CIP-Pilot Action of the European Commission. LiveCity addresses a number of communities where the citizen of a city have specific challenges which can derive benefits from the use of live interactive high definition video-to-video. These communities include emergency ambulances; hospitals, doctors, museum curators, city administrations and schools. Today live interactive high definition video-to-video is becoming possible with a range of devices and applications. These are well supported in private networks owned by enterprises where quality of service is available. For a mass market in the cities quality of services is missing in the public internet. LiveCity implements a range of pilots for city communities across the public internet. We build a wireline and 4G wireless network of 4 cities and include a right of way without interference from unwanted traffic so that each user in can experience live interactive high definition video-to-video. UoA is involved in the implementation of a telemonitoring use case with the ofthalmological clinic of the Attikon hospital. Also, UoA has the management and technical overview of the WP2 which implements the LiveCity concepts in the health sector and in particular in emergency situations (ambulances and ER units).

A video showcasing the LiveCity concepts can be found here. During the FIA 2014 conference LiveCity was awarded the Best Demonstration Award (in Greek)

Main duties and responsibilities

  • WP2 Management
  • Technical Overview of the implementation of the Telemonitoring Use Case

SmartAgri Food

The SmartAgriFood project is part of the Future Internet Public-Private Partnership (FI-PPP) program and addresses farming, agri-logistics and food awareness as a use case for this. The intelligence, efficiency, sustainability and performance of the agri-food sector can be radically enhanced by using information & decision support systems that are tightly integrated with advanced internet-based networks & services. Concurrently, the sector provides use cases for Future Internet des gn from physical layer all the way up to the service layer.

Main duties and responsibilities

  • Technical overview of the Greenhouse pilot implementation
  • Design, implementation and integration of excerpts of the Greenhouse Pilot

COoperative aNd Self growing Energy awaRe Networks

CONSERN (COoperative aNd Self growing Energy awaRe Networks) is a Specifc Targeted Research Project (STREP) of the 7th Framework Programme (FP7) of the European Commission, addressing (i) the Wireless Sensor Networks and Cooperating Objects and (ii) the Control of large-scale systems pillars of the Strategic Objective ICT-2009.3.5 "Engineering of Networked Monitoring and Control systems.

CONSERN is introducing a novel paradigm for dedicated, purpose-driven small scale wireless networks characterized by a service-centric evolutionary approach, referred here as an energy-aware self-growing network and system. In the context of CONSERN, the Self-Growing network paradigm considers (i) mechanisms for energy efficient interaction of the wireless network elements and (ii) mechanisms for the reliable and efficient evolvement towards later lifecycle phases. A Self-Growing network is set up on-demand and is initially dedicated to a single purpose such monitoring and/or control. Self-growing can be applied on large scale, distributed and cooperative systems, including, for example, construction sites, and delivering wireless services within a complex home/office environment requiring network parameter negotiation with a multitude of neighbouring networks, etc. In the course of its lifecycle, it may coexist and cooperate with other wireless networks of distinct owners and interest groups evolving in the deployment area using or augmenting existing capacity in order to either serve additional purposes (e.g. in case of an emergency) or optimising under a specific purpose. CONSERN facilitates the emergence of mechanisms achieving energy efficient, robust, predictable and self-adaptive operation for future networked systems by considering mechanisms and methods for autonomic (design- and run-time) energy optimisations as well as cooperative energy aware behaviour of the distributed system nodes.

Main duties and responsibilities

  • Project Technical Overview
  • Analysis, design, implementation and experimental assessment of novel algorithms energy aware, self growing networks
  • Participation in the design and implementation of excerpt of the CONSERN prototyping environment. A short demo is provided here: 

Self- Management of Cognitive Future Internet

Self-NET (Self-Management of Cognitive Future InterNET Elements - ICT-224344 ) aims to design, develop and validate an innovative paradigm for cognitive self-managed elements of the Future Internet. Self-NET shall engineer the Future Internet based on cognitive behaviour with a high degree of autonomy, by proposing the operation of self-managed Future Internet elements around a novel feedback-control cycle. Self-NET shall embed new management capabilities into network elements in order to take advantage of the increasing knowledge that characterises the daily operation of mobile Future Internet users. The consortium shall develop innovative cross-layer design optimisation approaches that alleviate the shortcomings and duplication of functionalities in different protocol layers of the present IP stack. Furthermore, Self-NET shall provide a peer-to-peer style distribution of responsibilities among self-governed elements of the Future Internet, therefore overcoming the barrier of current client-server and proxy-based models in the operation of mobility management, broadcast/multicast, and quality of service mechanisms.

Main duties and responsibilities

  • Analysis, design, implementation and experimental assessment of novel algorithms for the self-management of wireless network nodes
    • The results of this effort is depicted in the following publications -1,2
  • Design and implementation of the SelfNET prototyping environment. A short demo is provided here: 

End to End Efficiency

End-to-End Efficiency (E3 - ICT-216248) is aiming at integrating cognitive wireless systems in the Beyond 3G (B3G) world, evolving current and future heterogeneous wireless system infrastructures into an integrated, scalble and efficiently managed B3G cognitive system framework from a technical, regulatory, standardisation and business perspective. The key objective of the E3 project is to design, develop, prototype and showcase solutions for optimised usage of existing and future radio access resources. In particular, more flexible use of frequency spectrum, terminals, base stations and networks is addressed.

Main duties and responsibilities

  • Analysis and design of the E3 architecture
    • The results of this cross consortium effort are depicted in three papers -1,2,3 
  • Analysis, design, implementation and experimental assessment of novel architectures for cognitive radio systems
    • A standalone prototype designed and implemented by UoA -1
    • The integrated prototype available in the end of the project -2
  • Leader of sub-workpackage 6.1, "Interfaces, Integration and Validation of Cognitive Systems"

End to End Reconfigurability - Phase 2

Building on the successful developments of the first phase, End-to-End Reconfigurability Phase II (E2R II - IST-2005-027714) will demonstrate and validate technologies that enable a true seamless experience based on reconfigurable heterogeneous systems. The project will pursue research into the most promising directions towards removing walls (current technical and regulatory limitations) and building bridges (technical) in order to facilitate the vision of true end-to-end connectivity. E2R is seen by many actors of the wireless industry as a core technology to enable the full potential of Beyond 3G systems. It has the potential to revolutionize wireless communications just as the PC revolutionized computing.

Main duties and responsibilities

  • Analysis and design of the E2R II architecture
    • A paper depicting the actual proof of concept implementation of the architecture -1   
  • Analysis, design, implementation and experimental assessment of novel architectures for reconfigurable networks
    • A presentation outlining UoA standalone prototype in the end of the project (presented in the context of E3)  - 1   
    • An implementation of reconfigurable protocols based on the concept of software components - 2
    • First year audit demonstration, lead by UoA - 3
Other excerpts of my work conducted in the context of the project can be found here, here, here and here

End to End Reconfigurability

The End-to-End Reconfigurability (E2R - IST-2003-507995) project aims at bringing full benefits of the valuable diversity within the Radio Eco-Space, composed of wide range of systems such as Cellular, Wireless Local Area and Broadcast. The key objective of the E2R project is to devise, develop and trial architectural design of reconfigurable devices and supporting system functions to offer an expanded set of operational choices to the users, applications and service providers, operators, regulators in the context of heterogeneous mobile radio systems.

Main duties and responsibilities

  • Analysis, design, implementation and experimental assessment of novel architectures for reconfigurable networks
    • The Reconfiguration Control and Service Provisioning Manager (RCSPM) platform, designed and implemented by UoA -1
    • A UoA lead integrated prototyping effort, available at the end of the project

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    • The final audit demonstrations, with UoA participating in all 3 of them, and leading the last one  -2
    • Component based, application layer reconfiguration, part of UoA prototype
    • Component based, application layer reconfiguration, part of UoA prototype (longer version - no comments)

 

 
 

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