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Optimal power flow (OPF) plays a crucial role in addressing asymmetric operational problems of bipolar direct current distribution networks (DCDNs). However, the effectiveness of existing OPF models applied to bipolar DCDNs exhibits sensitivity to the problem type, underlying assumptions, and choice of objective functions. Hence, this paper proposes a dynamic decoupling-based convex-concave programming (CCP) framework to formulate an OPF model, aiming for a more rational impact across diverse applications in asymmetric operational bipolar DCDNs. More specifically, the coupled power between poles and ports of bipolar DCDNs is analyzed in detail, leading to the derivation of decoupled pole-to-ground equivalent circuits without relying on any preliminary assumption. Subsequently, the OPF problem of the equivalent circuits is formulated via CCP, involving the introduction of a cutting plane through difference-of-convex inequalities to limit the feasible region of the traditional OPF based on second-order cone programming, thereby diminishing dependence on exact relaxation conditions. Finally, a solution method is proposed to dynamically correct both the decoupled equivalent circuits and the cutting plane. The numerical results indicate that this method effectively addresses power optimization problems with a non-strictly monotonic objective function. Furthermore, it exhibits scalability, showcasing its applicability to large-scale radial bipolar DCDNs.

ABSTRACTMedia coverage is a key factor in increasing the flow and accessibility of information among the firm's stakeholders. Drawing on the socioemotional wealth (SEW) perspective, we investigate the antecedents of the level of media coverage of family firms' activism in sustainability. Using hand‐collected data from a sample of public Italian family firms, we provide several novel contributions to the academic debate. First, we find that family involvement on the board of directors is negatively associated with the level of media coverage of the family firm's engagement in sustainability. Conversely, we find that later generational stages of the family business are positively associated with the level of corporate media coverage on sustainability. Our study advances the literature on both corporate sustainability issues and media coverage in the context of family businesses.

This study aims to review the literature on environmental disclosure and firm performance in order to show current trends, challenges, and adventures for future research. We attempted a systematic and structured literature review of 67 studies published in 2001-2023 using the accounting journal in the Chartered Accounting Business School (CABS) ranking. The analysis revealed three main research streams: 1) firm performance, CSR and sustainability; 2) accounting and environmental disclosure; 3) board of directors and decision-making process in the field environment and firm performance. The relevance of this literature review is due to understanding the state of the art between environmental disclosure and firm performance. Through our work, we highlight the current and future issues in the firm performance and environmental disclosure. This paper supports future research and it is directed to academics, practitioners, policy makers and decision makers.

In floating photovoltaics (FPV), modules are installed on bodies of water to alleviate the land competition arising from the growing deployment of photovoltaics (PV). However, the installation of artificial structures on water basins can affect the landscape and raise concerns even among those in favor of renewables. This work specifically investigates the public acceptance of FPV among renewable energy supporters to identify its main drivers and barriers. The investigation was conducted through a public survey, which counted more than 300 respondents favorable to renewable energies. The findings reveal that, while public acceptance of FPV remains positive, it is lower than that experienced by renewable energy systems in general. This disparity is mainly due to concerns surrounding the landscape and fauna impacts of this novel technology. In particular, an inverse relationship between FPV acceptance and its perceived alteration of the landscape beauty is found. Notably, respondents expressing a negative opinion on FPV are also those most concerned by the landscape impact of traditional PV. The investigation also proposes some preliminary solutions for enhancing FPV's social acceptance. The effectiveness of these potential measures is evaluated, providing valuable insights for stakeholders and policymakers in the renewable energy sector.

Not only advances but also old addictions, setbacks, obstructions and delays are observed during COP16 (on biodiversity), COP29 (on climate change) and G20 in a year full of tragedies resulting from climate change; we need to look in the rearview mirror and plan new paths to be presented and discussed at COP30, in 2025, in the Brazilian Amazon. Worldwide temperature records show that 2023 and 2024 were the warmest in at least the last 2000 years (Esper, Torbenson, and Büntgen 2024). About 90% of the excess heat trapped by greenhouse gases and 30% of human emissions of carbon dioxide are stored in the ocean, shielding the planet from even more rapid changes in the biosphere. The recent acceleration in climate change is a threat not only to terrestrial systems but also to largely neglected marine ecosystems and their socio-biodiversity. Considering the relationship between global warming and biological extinctions (Malanoski et al. 2024), as well as the high vulnerability of marine biodiversity to these global threats (Pinsky et al. 2019), we call for the urgent need to create global and multilateral policies that are based on climate-smart ocean planning and carbon neutrality, focused on climate adaptation and mitigation strategies to protect, restore and foster sustainable management of marine socio-ecological systems (Frazão Santos et al. 2024).

This vision article accompanies a Special Issue of Applied Thermal Engineering dedicated to the 14th International Conference on Boiler Technology (ICBT 2022) on ‘Transition technologies towards carbon neutrality and reduced environmental impacts’. The aim of the conference was to discuss recent progress, achievements and new solutions in the field of thermal power production, covering scientific research from a wide range of universities and research centres on topics relating to the design and operation of boilers and auxiliary devices for thermal power generation. This article discusses a selection of papers presented at this conference and selected for publication in Applied Thermal Engineering.

The aviation industry is a “hard to electrify” sector with limited possibilities for alternative fuels such as green hydrogen. Therefore, there is a call for sustainable fuel alternatives which is driving intensive research into bio-jet fuels (BJF) that could be used in aviation, without revamping the aircraft fleets and the aviation infrastructures. This review evaluates the potential of photosynthetic microorganisms, focusing on the most challenging downstream processes, i.e. bio-oil production and its catalytic upgrade. The main bottlenecks of such processes are identified, and the most recent solutions, offered to overcome them, are critically reviewed. Finally, a statistical analysis of the key characteristics of current BJF derived from microalgae and cyanobacteria is presented, along with a discussion on their suitability for the aviation industry and the primary areas for improvement.

The zonal market (ZM) adopted in Europe, in contrast to the nodal market (NM), reconciles the inconsistency between physical networks and administrative management. However, the growing integration of renewable energy sources (RESs) has introduced zonal supply-demand imbalances that exacerbate congestion and the need to re-dispatch. Furthermore, different clearing mechanisms between the day-ahead and real-time markets provide further opportunities for collusive bidding, decreasing total social welfare (TSW). Thus, this paper is the first to propose a long-term congestion management (CM) framework through a market zone (MZ) configuration approach with CM assessment considering collusive bidding in the joint spot markets. More specifically, a topology-based location division (TLD) method is proposed to partition optimal MZs, ensuring the minimum number of MZs based on critical branches. Then, a bi-level evolutionary model is developed to analyze the collusive bidding of producers in the day-ahead and ancillary service markets. Finally, the established framework is applied to a 20-bus test and simplified European systems. Our simulation on the 20-bus system shows that compared with the initial ZM and NM, the congestion cost of the optimized ZM decreased by 90% and 33%, respectively, while the TSW increased by around 13% and 1%, respectively.