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This paper presents the editorial for the Renewable and Sustainable Energy Reviews joint special issue devoted to the research work discussed and presented at the 11th Conference on Sustainable Development of Energy, Water and Environment Systems (SDEWES), held from the 4th September to the 9th September 2016 in Lisbon, Portugal and the 2nd South East European (SEE) SDEWES Conference held from June 15th to June 18th, 2016 in Piran, Slovenia. This special issue is in line with the journal's aim of publishing research from across the ever-broadening field of renewable and sustainable energy with a strong review element. Previous SDEWES conference special issues have gathered a significant knowledge base in the field of sustainable development that reflects the continuous research efforts of the SDEWES research community. Therefore, this editorial provides not only an overview of the papers published in this particular special issue, but also a wider overview of the current trends in the domain of sustainable and renewable energy. This year's special issue focuses particularly on the benefits of the bio-based economy, energy security issues, fossil fuel thermal plant alternatives and environmental constraints, district heating and cooling together with cross sector energy efficiency and energy conservation issues. Sustainable transport systems, the issue of fuel poverty in urban neighbourhoods and renewable energy to support development of peripheral rural areas, optimising passive building design for hot climates and solar-powered heating and cooling are further topics featured in this special issue. In the process of selecting papers for this special issue, the guest editors invited in total 23 extended manuscripts for consideration for publication. After a rigorous review process by expert reviewers overseen by the guest editors a total of 16 articles were accepted for publication. [ABSTRACT FROM AUTHOR]

With nearly 70% of the world population expected to live in cities by 2050, assessing the sustainability of urban systems, both existing and future ones, is becoming increasingly relevant. Making cities more sustainable is a global priority, which is highlighted by 'Sustainable Cities and Communities' being listed as one of the Sustainable Development Goals (SDG) adopted by United Nations Member States in 2015. This Virtual Special Issue (VSI) explores the implementation and assessment of policies and technologies that contribute to the transition to a sustainable, energy efficient and regenerative society. We organized the issue according to four main research themes: 1) Renewable Energy Systems (i.e., different types of systems, qualitative assessments and public acceptance); 2) Sustainable Built Environment (which includes construction, operation and refurbishment); 3) Multi-Scale Models (considering urban sustainability transition from building to districts, or cities and regions to multi-country comparisons and their scaling across different countries); and 4) Governance and Policy (climate change mitigation and adaptation plans/policies that are reported across countries, urban services and infrastructures). This paper serves two purposes. The first is to provide an analysis about patterns, correlations and synergies found across the different topics that have been addressed over the last 20 years in the literature about cities' sustainability paths. A bibliometric analysis and a contingency matrix show the degree of correlation between scientific journals and main topics addressed by published articles. Secondly, the paper acts as an Editorial to the VSI, introducing the wealth of research articles and topics included in it. Both the bibliometric analysis and the papers published in this VSI demonstrate the interconnectedness of energy consumption, pollutant emissions and the competition for finite resources. The aim is to present advances and challenges of this exciting and ever-evolving research field to inform and guide future studies of urban sustainability. • We carried out a bibliometric analysis of the literature using the Cortext Manager platform· Using network analysis of a corpus of paper spanning 20 years we identified 8 major clusters. • The paper serves also as editorial for a virtual special issue dealing with urban sustainability pathways. • The virtual special issue is organised in four main themes, which touch upon different Sustainable Development Goals. [ABSTRACT FROM AUTHOR]

This editorial in Renewable and Sustainable Energy Reviews (RSER) is a virtual special issue (VSI) dedicated to the three conferences on Sustainable Development of Energy, Water and Environment Systems (SDEWES) held in 2018. These included the 13th SDEWES Conference (30 September to the 4 October in Palermo, Italy), the 3rd South East European SDEWES Conference (30 June to 4 July in Novi Sad, Serbia and the 1st Latin American SDEWES Conference (28–31 January in Rio de Janeiro, Brazil). In line with the RSER's policy, this VSI published two types of articles, either high quality review papers or original research papers with a strong review component. The guest editors invited 55 extended articles presented at the 2018 SDEWES conferences. These articles went through rigorous peer review process, and a total of 17 articles were finally accepted and published in this VSI. This editorial overviews these articles and examines their contribution to the field. In addition this editorial also provides an overview of the SDEWES 2018 conference series in order to reflect the continuous research efforts of the SDEWES research community and knowledge body on topics such as sustainable mobility, energy storage systems, various sustainability assessments, renewable energy source (RES) potential and biorefineries. [ABSTRACT FROM AUTHOR]

Abstract: Urbanization, sustainability, energy efficiency, information and communication technology (ICT) and nanotechnology are emerging at the beginning of the 21st century. They are seeking to improve environmental effectiveness in the context of connected communities, global competitiveness, economic development, climate change, and demographic shifts. Virtually all proposed solutions to energy consumption and climate change acknowledge the role ICT plays as a key enabler of environmental effectiveness. One of the major challenges that the ICT sector faces today is that hardware is being pushed to its physical limits. The traditional means to reduce product size, increase functionality and enhance computing capabilities are becoming difficult and expensive every passing day. On the other hand, the industry is benefiting from nanotechnology advances with numerous applications including those in smarter sensors, logic elements, computer chips, memory storage devices, optoelectronics, quantum computing, etc. This paper presents an overview of the ICT benefiting from development in nanotechnology with respect to sustainability and energy efficiency. [Copyright &y& Elsevier]