About
329
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Introduction
Professor Ioannis Psarras is the Director of the Decision Support Systems Laboratory (DSSlab) of the School of Electrical and Computer Engineering of the National Technical University of Athens and Director of the University Research Institute of Communication and Computer Systems. He teaches 8 undergraduate and 9 postgraduate courses, while under his supervision 22 PhD theses and numerous diploma theses have been successfully completed.
Additional affiliations
June 2022 - present
January 2009 - June 2022
Education
March 1987 - October 1989
September 1979 - October 1982
Publications
Publications (329)
Social media platforms, including X, Facebook, and Instagram, host millions of daily users, giving rise to bots automated programs disseminating misinformation and ideologies with tangible real-world consequences. While bot detection in platform X has been the area of many deep learning models with adequate results, most approaches neglect the grap...
Social media platforms, including X, Facebook, and Instagram, host millions of daily users, giving rise to bots-automated programs disseminating misinformation and ideologies with tangible real-world consequences. While bot detection in platform X has been the area of many deep learning models with adequate results, most approaches neglect the grap...
Recognising the urgency of addressing climate change and the imperative to mitigate its effects, the European Union (EU) has embarked on a transformative journey to reshape its energy landscape, with a pronounced emphasis on harnessing renewable energy sources (RESs) and augmenting their contribution to electricity generation. To propel Europe towa...
Regional energy planning is crucial for supporting national and EU climate goals, given the escalating climate change impacts and the need for a sustainable energy transition. The EU policy framework considers energy efficiency as one of the key pillars to meet the EU's climate objectives, whilst more recently the revised Energy Efficiency Directiv...
Since its conceptualization in 2008, blockchain technology has advanced rapidly and been applied in multiple domains. In higher education, blockchain can be applied to develop ICT systems that can revolutionize student accreditation through certificate verification and micro-accreditations, which represent skills and other learning outcomes, in the...
Artificial intelligence (AI) can significantly enhance the decision-making processes in a plethora of key energy-related challenges such as energy supply and demand prediction, grid flexibility, asset maintenance and operation, and load forecasting. As such, it is expected to play a crucial role in the digitalisation and sustainability of the energ...
Short-term load forecasting (STLF) is crucial for the daily operation of power grids. However, the non-linearity, non-stationarity, and randomness characterizing electricity demand time series renders STLF a challenging task. Various forecasting approaches have been proposed for improving STLF, including neural network (NN) models which are trained...
Clean energy technological innovations are widely acknowledged as a prerequisite to achieving ambitious long-term energy and climate targets. However, the optimal speed of their adoption has been parsimoniously studied in the literature. This study seeks to identify the optimal intensity of moving to a green hydrogen electricity sector in Greece, u...
Nowadays, boosting the implementation of energy efficiency measures in buildings and subsequently, mainstreaming energy efficiency financing is of paramount importance for the European Union towards achieving its goal of carbon-neutrality by 2050. Unfortunately, statistics have shown that a lot of effort is needed to achieve the Europe’s targets, s...
Standard population projections show that virtually all global growth will be in urban areas over the next thirty years. At the same time, the last decades of constant economic and population growth, the modern lifestyle of developed countries and the creation of new needs have led to an increase in energy use per capita and at an overall level res...
Energy efficiency (EE) is an integral part of global energy policy, since it helps in tackling climate change and ensures long term security of energy supply. EE investments have a direct effect on reducing energy consumption towards achieving the Europe energy and climate objectives, while driving economic growth. However, it remains a challenge h...
In power grids, short-term load forecasting (STLF) is crucial as it contributes to the optimization of their reliability, emissions, and costs, while it enables the participation of energy companies in the energy market. STLF is a challenging task, due to the complex demand of active and reactive power from multiple types of electrical loads and th...
Clean energy technological innovations are widely acknowledged as a prerequisite to achieving ambitious long-term energy and climate targets. However, the optimal speed of their adoption has been parsimoniously studied in the literature. This study seeks to identify the optimal intensity of moving to a green hydrogen electricity sector in Greece, u...
The electric vehicle (EV) industry has made significant progress but, in many markets, there are still barriers holding back its advancement. A key issue is the anxiety caused to the drivers by the limited range of current EV models and the inadequate access to charging stations in long-distance trips, as is the case on highways. We propose an intu...
Alzheimer's disease (AD) is a progressive neurological disorder, meaning that the symptoms develop gradually throughout the years. It is also the main cause of dementia, which affects memory, thinking skills, and mental abilities. Nowadays, researchers have moved their interest towards AD detection from spontaneous speech, since it constitutes a ti...
Epilepsy constitutes a chronic noncommunicable disease of the brain affecting approximately 50 million people around the world. Most of the existing research initiatives propose methods for detecting and predicting epilepsy, which rely on the extraction of handcrafted features and the train of traditional machine learning classifiers. In this paper...
The energy demand of modern communities contributes significantly to climate change, increasing the release of greenhouse gases into the atmosphere. Energy efficiency is recognised as the key pathway to reducing energy usage while sustaining an equivalent, contemporary economic activity. In other words, to avoid climate change, mainstreaming energy...
Investing in energy efficiency (EE) could play a crucial role in transitioning to a future economy, where sustainable growth will be the centre of attention. To reach such EE investments, a mobilisation of capital through the targeted use of funds, innovative schemes and standardisation tools for the respective key actors is required. The European...
Alzheimer's disease (AD) constitutes a neurodegenerative disease with serious consequences to peoples' everyday lives, if it is not diagnosed early since there is no available cure. Because of the cost of examinations for diagnosing dementia, i.e., Magnetic Resonance Imaging (MRI), electroencephalogram (EEG) signals etc., current work has been focu...
Citizen sensing applications need to have a number of users defined that ensures their effectiveness. This is not a straightforward task because neither the relationship between the size of the userbase or its effectiveness is easily quantified, nor is it clear which threshold for the number of users would make the application ‘effective’. This pap...
In alignment with the European Union’s legislation, Greece submitted its final 10-year National Energy and Climate Plan (NECP) in December 2019, setting more ambitious energy and climate targets than those originally proposed in the draft version of the document. Apart from higher penetration of renewable energy sources (RES), the final NECP projec...
Traditional investment institutions face a lack of understanding regarding the technical aspects of energy efficiency investments. Indeed, due to the heterogeneity of such investments and to the immaturity of the market the entry into this business is unattractive for many financial institutions, although energy efficiency projects can often presen...
Traditional investment institutions face a lack of understanding regarding the technical aspects of energy efficiency investments. Indeed, due to the heterogeneity of such investments and due to the immaturity of the market, the entry into this business is unattractive for many financial institutions, although energy efficiency projects can often p...
Energy efficiency finance is considered of outmost importance for the achievement of the European Union’s (EU) energy and climate objectives for 2030 and beyond. However, it remains a challenge how to identify which investments could foster sustainable growth, while also having the capacity to meet their commitments from the first stages of investm...
Nowadays, European Union (EU) considers Energy Efficiency (ΕE) as one of its main pillars in order to reduce pollution and energy imports. The recently released Technical Expert Group (TEG) report on EU Taxonomy is a guide to green development, in continuance to EU’s focus on reducing carbon emissions, scale down energy consumption and secure Europ...
The plight of missing children is particularly strenuous and sensitive for society at local, national and European levels, cutting across class, race, and age. A quarter million cases of missing children is reported in the EU annually, which are either parental abductions, stranger abductions, runaways, missing unaccompanied migrant minors, and gen...
Energy Efficiency (EE) has been identified as one of the most cost-effective means aiming at reducing energy consumption while maintaining an equivalent level of economic activity. Mainstreaming EE financing is considered a key priority to avert climate change. The lack of evidence on the performance, commonly agreed procedures and standards for EE...
This study introduces a framework for assessing the resilience of different European countries against the problem of energy poverty. The proposed framework is established upon two major implementation pillars: capturing stakeholder knowledge and employing a multi-criteria analysis framework in order to provide valuable insights and objective resul...
Lignite has long dominated Greece’s electricity system, boosting economic growth and energy security, given the abundant domestic resources. In line with its national and international commitments to climate action and sustainable development, the country is currently facing the urgent need to transform its energy system, overcome its technological...
This study introduces a framework that assists utilities effectively identify energy poor households among their clients. The framework is established upon an enhanced version of the well-known 10% measurement index, being adjusted by a set of weather-driven, income-oriented, and energy-oriented variables so that more accurate, indicative, and obje...
The European Union (EU) aims to prepare its strategy and infrastructure for further decarbonisation of its energy system in the longer term towards 2050. Recent political discussions and research interest focus on ways to accelerate the development and deployment of low-carbon technologies with respect to the targets set for 2030 and 2050. However,...
The general idea of the AMBER/Child Alert System is that by broadcasting and distributing information about a missing child to the community, the public’s involvement can trigger critical feedback that would have otherwise been ignored. This feedback, in several cases, can be proved decisive in finding the missing child. Despite the efforts at coun...
Although 99% of toy manufacturing companies are SMEs, the toy market is dominated by a limited number of massive global brands. Therefore, SMEs should enhance their current business model in a way that would give them a competitive advantage. This paper presents work from the European-funded research project ToyLabs that aims to build on this ident...
Electricity demand forecasting is an essential process in the operation and planning procedures of power systems that considerably influences the decisions of utility providers. Main aim of this paper is, first, to examine the relationship between a time series and influential multiple criteria, and, second, to provide long-term electricity demand...
Energy policy making is a complex, multidisciplinary process that usually requires the assessment of a large number of factors. Consequently, Multiple Criteria Decision Making, which is a sub-discipline of Operational Research, has long been employed as an approach to addressing problems of this domain. This paper aims to explore how the preference...
Decision making in the maritime environment is a complex and difficult task. The stochastic nature of maritime operations, in combination with the complicated and often hostile sea setting, composes a scene where obvious solutions are not always the best choice. The assessment and evaluation of risks often lays on the exploitation of the experts’ k...
The recently legislated European Union (EU) Directive 2009/28/EC entitles Member States (MSs) to implement Cooperation Mechanisms, in order to promote the use of energy from renewable sources (RES) and enables them to achieve their binding national targets for 2020. The RES Directive introduces, inter alia, the implementation of joint RES projects...
Significant renewable energy (RE) investments have to be implemented in order to achieve the ambitious RE targets set in the EU for 2020 and beyond. Moreover, a great amount of capital has to be leveraged, as these projects are followed by high investment and financing costs. Main aim of this paper is the provision of a comprehensive assessment of...
Linked Data has become the current W3C recommended approach for publishing data on the World Wide Web as it is sharable, extensible, and easily re-usable. An ecosystem of linked data hubs in the Public Sector has the potential to offer significant benefits to its consumers (other public offices and ministries, as well as researchers, citizens and S...
Cities are becoming more and more of a focal point for our economies and societies, particularly because of the on-going urbanization, and the trend towards increasingly knowledge intensive economies as well as their growing share of resource consumption and emissions. Energy is an essential component of life in the cities, as it supports the whole...
Cities are becoming more and more of a focal point for our economies and societies, particularly because of the on-going urbanization, and the trend towards increasingly knowledge intensive economies as well as their growing share of resource consumption and emissions. Energy is an essential component of life in the cities, as it supports the whole...
Surveys have revealed that the cost to the economy caused by the occurrence of power interruptions is significant. Distribution transformers constitute the most important technical component of an electrical distribution network. The purpose of this paper is to assess the cost to the Greek economy, deriving from failures of distribution transformer...
A key factor hampering the delivery of high energy performance renovations in buildings is the under-qualification of the construction sector's workforce with regard to energy efficiency and renewable energy sources systems. Towards this direction, this paper proposes an integrated methodological framework, determining measures for the case of Gree...
Weak macroeconomic conditions mean admittedly that government spending on Information and Communication Technologies (ICTs) is reduced and consequently that ICT-related policies are scrutinized for their necessity, efficiency and impact on growth. At the same time, such conditions bring into the spotlight and set priority to measures targeting the...
Purpose
This paper aims to explore Turkey’s current energy status with a on renewable energy sources (RES) cooperation mechanisms, within the framework of RES Directive 2009/28/EC. The study uses the SWOT (strengths, weaknesses, opportunities, threats) analysis for drawing results about perspectives of RES cooperation between Turkey and European Un...
Making Smart Energy Cities (SEC) a reality requires an intelligent and integrated assessment and consideration of various data sets, as well as relevant intelligent systems in a transparent and accessible manner. The scope of this paper is to present an innovative package of decision support tools (entitled " OPTIMUS ") for energy managers and ener...
Among the most important, and certainly most promising, trends of the last decade is this of digitization. Organizations, and mainly businesses, of various profiles invest lots of money and effort in order to digitize processes, products and offerings. The paper at hand aims to investigate whether the same applies to the public sector as well. A pa...
A Smart City Energy Assessment Framework (SCEAF) is introduced to evaluate the performance and behavior of a city towards energy optimization, taking into consideration multiple characteristics. The SCEAF aims to provide to city authorities a systematic and independent evaluation means of the actions taken towards energy efficiency in parallel with...
The national binding targets, set for renewable energy deployment at European Union (EU), call for extended clean energy investments. Renewable energy projects require high up-front expenditures including, in many cases, considerable financing costs. The main objective of this paper is to elaborate and apply a methodology that allows assessing the...
This paper assesses twenty-seven alternative natural gas supply corridors for the case of Greece, according to a multicriteria analysis approach based on three main pillars: (1) economics of supply, (2) security of supply, and (3) cooperation between countries. The alternatives include onshore and offshore pipeline corridors and LNG shipping, deter...
Climate change mitigation is high on political agenda, while efforts are currently intensified at an international level. The concern is short-term and long-term climate goals to be reached successfully and cost effectively. Renewable energy deployment is the key to contribute to the implementation of international (regional and/or country) climate...
Quantifying the actual impact of the proposed and implemented policies, with particular focus on citizens' prosperity, constitutes an important step towards holding policy makers and politicians in general accountable. However, concerns on the legitimacy of prosperity indicators that constitute the main tool towards quantifying and measuring prospe...
Nowadays cities tend to become “Smarter”, usually disregarding the issues of energy efficiency and sustainability. Therefore, optimizing energy use in a city remains a challenge and respective decision support systems are important to guide local authorities toward that direction. This paper provides a holistic approach presenting a Smart City Ener...
During the last years, the manufacturing industry is experiencing an increasing trend in the utilization of mixed-model assembly lines (MMALs). These lines, often adhering to the Just-In-Time production system, produce diversified products efficiently, maintaining least possible inventories. In this paper, the sequencing of an already balanced larg...
Nowadays, cities are key to meet sustainability objectives in the European Union. Almost 75% of European habitants live in cities and the majority of cities authorities have committed to increase energy efficiency by improving buildings, equipment and facilities' performance. Actually, about 35% of the EU's buildings are over 50 years old and by im...