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Recent Projects

SIMBAD: Combining Simulation Models and Big Data Analytics for ATM Performance Analysis

The overall goal of SIMBAD is to advance the state-of-the-art in ATM performance modelling through the combination of model-based approaches and data-driven methods, taking advantage of the opportunities opened by recent advances in big data technologies and data science.

The approach proposed by SIMBAD relies on three main pillars:

1. the estimation of hidden variables in aircraft trajectory models,
2. the development of new traffic pattern clustering and classification techniques, and
3. the application of active learning meta-modelling to large-scale traffic simulations.

Duration: 
2020 - 2022
Objectives: 

The specific objectives of the project are the following:

1. Explore the use of machine learning techniques for the modelling of trajectories and estimation of hidden variables from historical air traffic data.

2. Develop new machine learning algorithms for traffic pattern classification.

3. Investigate the use of active learning metamodelling to enable a more efficient exploration of the input‑output space of complex ATM simulation models.

4. Demonstrate and evaluate the newly developed techniques in order to assess their maturity, derive recommendations on how to apply them to ATM performance assessment, and propose a roadmap for the transition of the project results to the next stages of the R&D cycle.

Funding Body: 

SESAR JU - H2020

Research topic: 

Machine Learning, Reinforcement Learning

TAPAS: Towards an Automated and exPlainable ATM System

TAPAS (Towards an Automated and exPlainable ATM System) addresses explicitly the effectiveness
of introducing AI/ML solutions in order to increase the levels of automation in ATM, considering the need of the operator to trust the system (taken as the ability to understand and explain its behaviour and outcomes).
TAPAS will address the AI/ML models’ transparency challenge, as it is considered to be the highest

Duration: 
June 2020 - November 2022
Objectives: 

The objective for the project is the exploration of highly automated XAI scenarios through validation
activities and Visual Analytics (VA), in order to identify needs and strategies to address transparency and explainability in the operational cases considered, paving the way for the application of these AI/ML technologies in ATM environments.
The proposed research will advance the state-of-the-art in two main areas:
1. Identification of principles and criteria for AI/ML transparency/explainability1 in ATM domain
scenarios, based on the two operational cases considered and with the target to identify transparency
requirements for AI/ML methods in general, limiting domain-specific results.
2. Selection and development of suitable and explainable AI/ML methods in the operational cases
identified, to fit the needs of transparency as expressed in the explainability criteria developed for each
automation level and according to actors’ needs.

Funding Body: 

SESAR JU

Research topic: 

Ai, Reinforcement Learning, Explainable AI/ML

Trajectory Planning for Conflict-free Trajectories: A Multi Agent Reinforcement Learning Approach

While data-driven methods aim to build models for trajectory planning and conflicts resolution, incorporating stakeholders’ interests and preferences, the multi-agent reinforcement learning (MARL) approach aims to address complexity phenomena due to traffic and resolve conflicts between multiple trajectories, simultaneously. Towards that goal we aim to formulate the problem as a Markov Decision Making Process, i.e. MDP, and apply multi-agent reinforcement learning (MARL) methods to resolve it.

Contributions expected:

Duration: 
2019-2022
Objectives: 

Objective: The objective of this PhD is to explore and present novel algorithms towards planning conflict-free trajectories at the pre-tactical phase of operations in computationally efficient ways, for large number of trajectories in airspaces comprising multiple FIRs, following a methodology combining data-driven and agent-based approaches.

Challenges:
1. Addressing conflict-free trajectory planning among multiple flights, simultaneously, while considering complex ATM phenomena and operational constraints.
2. Addressing optimization in trajectory planning taking into account multiple objectives concerning airspace use, cost indicators, preferences and constraints of stakeholders involved.
3. Follow a data-driven approach to reveal stakeholders’ preferences on trajectories followed and on resolving conflicts.
4. Addressing complex air traffic management phenomena due to traffic.
5. Addressing scalability: Coordinating between different FIRs for large number of flights.

Funding Body: 

ENGAGE KTN

Data-Driven Trajectory Imitation with Reinforcement Learning.

Reinforcement Learning, and particularly Q-learning has been studied in the context of predicting trajectories, exploiting historical data about trajectories, enhanced with aircraft intent information . This is a recently-proposed approach whose potential and limitations have been explored by the DART project .

Duration: 
2019-2020
Objectives: 

The objective of this project is to present algorithms for data-driven imitation of trajectories planned or flown, following deep reinforcement learning techniques towards enhancing our trajectory planning abilities.

Challenges:
1. Imitating experts on planning trajectories following a data-driven approach.
2. Learning airspace users’ rewards on planning trajectories.
3. Identifying the features that drive planning operations.
4. Produce optimal plans for trajectories.

Funding Body: 

ENGAGE KTN

Research topic: 

Imitation Learning, Planning Trajectories, Aviation Traffic Management

DART – Data-Driven Aircraft Trajectory Prediction Research

DART (Data-driven AiRcraft Trajectory prediction research) addresses the topic “ER-02-2015 - Data Science in ATM” exploring the applicability of data science and complexity science techniques to the ATM domain. DART delivers an understanding on the suitability of applying big data and agent –based modelling techniques for predicting aircraft trajectories based on data-driven models and accounting for ATM network complexity effects, considering multiple correlated trajectories.

Duration: 
2016-2018
Objectives: 

· Definition of requirements for the input datasets needed. The requirements will consider the trajectory prediction accuracy expected.
· Study of the application of big-data techniques to trajectory related data gathering, filtering, storing, prioritization, indexing or segmentation to support the generation of reliable and homogenous input datasets.
· Study of different data-driven learning techniques to describe how a reliable trajectory prediction model will leverage them.
· Formal description of the complexity network to support correlated multiple trajectory predictions .
· Study of the application of agent-based models to the prediction of multiple correlated trajectory predictions considering complexity network.
· Description of visualization techniques to enhance trajectory data management capabilities.
· Exploration of advanced visualization processes for data-driven model algorithms formulation, tuning and validation, in the context of 4D trajectories.

Funding Body: 

SESAR JU

Research topic: 

Air Traffic Management, Demand-Capacity Imbalance Resolution, Multiagent Reinforcement Learning, Trajectory Prediction, Congestions Resolution.

datAcron: Big Data Analytics for Time Critical Mobility Forecasting

datAcron project is funded by the European Union’s Horizon 2020 Programme under grant agreement No. 687591.

datAcron is a research and innovation collaborative project targeting at introducing novel methods to detect threats and abnormal activity of very large numbers of moving entities in large geographic areas.

Duration: 
01/01/2016 - 31/12/2018
Objectives: 

datAcron addresses core challenges related to the European Big Data Vision towards increasing our abilities to acquire, integrate, process, analyze and visualize data-in-motion and data-at-rest.

The datAcron core challenges are as follows:

Distributed management and querying of integrated spatiotemporal RDF data-at-rest and data-in-motion in integrated manners.

Detection and prediction of trajectories of moving entities in the Aviation and Maritime Domains

Recognition and Forecasting of Complex Events in the Aviation and Maritime Domains

Visual Analytics in the Aviation and Maritime Domains

Funding Body: 

EU via the H2020 programme.

Research topic: 

Big Data, Very large RDF data management and integration, integration of cross-streaming and archival data, data analytics for the prediction of trajectories and events, visual analytics, datAcron big data architecture

AMINESS: ANALYSIS OF MARINE INFORMATION FOR ENVIRONMENTALLY SAFE SHIPPING

Duration: 
2012-2015
Objectives: 

The goal of the AMINESS project is to contribute in the safety, management and monitoring of the sea environment and the Aegean Sea in particular.
Reducing the possibility of ship accidents in the Aegean Sea is important to all economic, environmental, and cultural sectors of Greece. Oil spill cleanups can cost over 1 billion Euros, whereas accidents involving water soluble cargos would result in irrevocable changes to the Aegean ecosystem. Despite an increase in traffic, there are no national-level monitoring policies and ships formulate routes according to their best judgment. However, to reduce their own financial risk, shipping companies would directly benefit from a system that can reduce the possibility of an accident involving their own ship.
The project objective is the development of a web portal offering access to ship owners, policy makers and the scientific community. The portal will be used to (a) suggest vessel and environmentally optimal safe route planning (b) deliver real-time alerts for ships and (c) support policy recommendations. The portal will be based on historical and real-time maritime data, including real-time information for ship position and speed, weather and sea forecasting and land and sea location. Through this web-portal, the project aims directly to reduce the risk of a ship accident and consequently to contribute in the protection of the Aegean Sea. At the same time, the web-portal aims to bring profit to the enterprise partners of the project, mainly by proposing accident risk reducing services to ship owners. The research partners will be given a unique opportunity to advance their methodologies for handling and analysis of huge quantities of heterogeneous spatiotemporal streaming data to assess risk in real time. Any lessons learned from the analysis of the high risk ship traffic of the Aegean Sea are likely to have direct and immediate relevance to policy makers and stakeholders globally.

Type: 

συνχρηματοδοτούμενο έργο από εθνικούς πόρους

Funding Body: 

General Sectretariat of Research and Technology (GSRT) - Synergasia

Research topic: 

Knowledge Representation, Ontologies, OBDA, semantic integration

SEMAGROW - Data intensive techniques to boost the real-time performance of global agricultural data infrastructures

As the trend to open up data and provide them freely on the Internet intensifies, the opportunities to create added value by combining and cross-indexing heterogeneous data at a large scale increase. To seize these opportunities we need infrastructure that is not only efficient, real-time responsive and scalable but is also flexible and robust enough to welcome data in any schema and form and to transparently relegate and translate queries from a unifying end-point to the multitude of data services that make up the open data cloud.

Duration: 
01/11/2012 - 31/10/2015
Funding Body: 

EC ICT

Research topic: 

- Ontology Alignment
- Ontology Population
- Content Classification

SINTELNET: Network of Excellence for Social Intelligence

Exploring the interplay of Information Technologies, Philosophy, Humanities and the Social Sciences
FP7-ICT-2009-C Project No. 286380
SINTELNET URL: http://www.sintelnet.eu/

Duration: 
2011-2014
Objectives: 

Traditional distinctions between the natural, the social and the artificial are becoming more and more blurred as radically new forms of Information Technology-enabled social environments are formed. These changes create the need to re-explore basic concepts of Philosophy, Humanities and Social Sciences. The aim of the European Network for Social Intelligence is twofold:

To look into those IT-enabled domains as a means for the critical examination of those basic concepts and,
To propose new approaches to understand and develop future IT-enabled social situations, by adapting and applying traditio-nal concepts.

Type: 

EU Funded

Research topic: 

-Action and agency (WG1)
-Communicative interaction (WG2)
-Group attitudes (WG3)
-Socio-technical epistemology (WG4)
-Social coordination (WG5)

NOMAD (Policy Formulation and Validation through non moderated crowdsourcing)

The ability to leverage the vast amount of user-generated content for supporting governments in their political decisions requires new ICT tools that will be able to analyze and classify the opinions expressed on the informal Web, or stimulate responses, as well as to put data from sources as diverse as blogs, online opinion polls and government reports to an effective use.

Duration: 
2011-2014
Funding Body: 

Information and Communication Technologies (Seventh Framework), European Union