John Psarras

John Psarras
National Technical University of Athens | NTUA · Laboratory of Decision Support Systems

Professor

About

297
Publications
40,759
Reads
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6,572
Citations
Additional affiliations
September 2007 - present
National Technical University of Athens
Position
  • Managing Director

Publications

Publications (297)
Article
Full-text available
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...
Preprint
Full-text available
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...
Article
Full-text available
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...
Article
Full-text available
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...
Chapter
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...
Chapter
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...
Conference Paper
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...
Conference Paper
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...
Conference Paper
Full-text available
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...
Conference Paper
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...
Article
Full-text available
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...
Article
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...
Article
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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...
Article
Full-text available
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,...
Conference Paper
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...
Chapter
Full-text available
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...
Article
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...
Chapter
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...
Article
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...
Article
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...
Article
Full-text available
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...
Article
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...
Article
Full-text available
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...
Article
Full-text available
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...
Article
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...
Article
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...
Article
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...
Conference Paper
Full-text available
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...
Conference Paper
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...
Chapter
Full-text available
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...
Article
Full-text available
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...
Article
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...
Chapter
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...
Conference Paper
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...
Article
Full-text available
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...
Article
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...
Conference Paper
Full-text available
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...
Conference Paper
In recent years, the European Union (EU) has developed a shared European vision of sustainable urban development. Towards this direction, holistic solutions and advanced energy management services are necessary, addressed to any local authority that has as purpose to implement sustainable energy action plans. In this context, the aim of this paper...
Conference Paper
Nowadays, digital enterprises are confronted with disruptive technological advancements in their constant quest for innovation and creativity. In order to evolve towards new forms of enterprises, driven by constant business model transformation, a number of challenges need to be addressed from a research and practice perspective. In this paper, a g...
Conference Paper
Full-text available
Prosperity indicators, following the view that " Indicators and performance measures have become an important element in policy initiatives relating to sustainability and to the re-invention of government " 1 , are nowadays considered one of the main instruments towards measuring and assessing the actual impact that policies and policy measures hav...
Article
Full-text available
The local authorities demonstrate their willingness to implement sound local sustainable energy policies, especially through their participation in the Covenant of Mayors (CoM). However, in rural environments, namely areas outside of large cities and towns, fulfilling their CoM commitments, especially as regards the local energy planning at the med...
Article
Nowadays, the European natural gas production has declined having, as a consequence, increased import dependence, which is estimated to reach 85% by 2030. Therefore, the implementation of a European energy policy, towards the viability, competitiveness and security of energy supply, is more than essential. Necessary parameter for the elaboration of...
Article
In most multi-objective optimization problems we aim at selecting the most preferred among the generated Pareto optimal solutions (a subjective selection among objectively determined solutions). In this paper we consider the robustness of the selected Pareto optimal solution in relation to perturbations within weights of the objective functions. Fo...
Article
Although the Covenant of Mayors (CoM) initiative embraces all regions and is not intended solely for large cities, fewer regions with rural characteristics have adhered to this initiative. In this respect, particular emphasis has to be laid on them towards 'greening' rural communities economies. The main aim of this paper is to present an interacti...
Article
The circumstances for shifting to new kinds of economies and to new ways of doing business are compelling, with the concept of the sharing and circular economies opening up novel ways to reconcile the quest for growth and business value with the environmental prudence perspective: "doing more with less". The evolution of Sensing Enterprises is expe...
Chapter
In recent years,many new initiatives have been taken at the European Union (EU) level to address specific elementsof sustainable development. A new impetus for commitment was also put in place by local and regional authorities through the Covenant of Mayors (CoM) initiative. According to the comes guidelines, two different approaches have been prop...
Chapter
This paper introduces an innovative approach for more factual, evidence-based and accountable policy analysis and evaluation, based on open public data, prosperity indicators, fuzzy cognitive maps and argumentation technology. The approach is inspired by the Policy Compass FP7 project and assumes to make better use of Europe’s open public data reso...
Conference Paper
Full-text available
Cities are characterized by a concentration of people, communities, activities, flows and impacts leading to severe sustainability challenges. Energy is an essential component of life in cities, as it supports the whole spectrum of their economic activities, and secures a certain level of quality of life to residents. Nowadays cities tend to become...
Conference Paper
Full-text available
Nowadays, decision support system (DSS) analysts use in an increasingly frequent basis, non-homogeneous variables for solving decision making problems. This is particularly true for energy policy related local planning. It is indeed crucial for the city authorities to know how optimal their use of energy is, by collecting and analyzing multidiscipl...
Article
This paper introduces an innovative approach for more factual, evidence-based and accountable policy analysis and evaluation, based on open public data, prosperity indicators, fuzzy cognitive maps and argumentation technology. The approach is inspired by the Policy Compass FP7 project and assumes to make better use of Europe's open public data reso...
Conference Paper
Full-text available
Energy is an essential component of life in cities, since it supports the whole spectrum of economic activities and provides high living standards to residents. Nowadays, cities tend to become “smarter”, usually disregarding the issues of energy efficiency and sustainability. This study provides City Authorities with a holistic approach, based on a...
Article
Buildings' thermal insulation has received a lot of attention these past years, in an effort to reduce the sector's high energy consumptions. A number of non-destructive methods have been used in order to evaluate in situ the building envelope's effective thermal transmittance, characterised, however, by long-lasting measurement periods. This paper...
Article
Open Government Data initiatives and particularly Open Government Data portals have proliferated since the late 2000's. A comprehensive analysis of the capabilities and potential of these initiatives is currently missing from the recent research literature. In order to address this gap, the paper at hand aims towards analyzing the landscape of Open...
Article
Robust strategic planning is considered crucial for the sustainability of the Greek energy sector, especially within the current highly volatile international environment. The application of multi-stakeholder foresight approaches facilitates the familiarization of key energy market players with the energy policy decision-making process. In this res...
Article
Nowadays, it is imperative need for the State to support Small Medium Enterprises (SMEs) operation in this difficult business environment through the development and adoption of appropriate policies, fostering green entrepreneurship and green energy growth. This paper aims to present a coherent and transparent methodological multi-criteria framewor...