After the onset of the recent COVID-19 pandemic, a number of studies reported on possible changes in electricity consumption trends. The overall theme of these reports was that "electricity use has decreased during the pandemic, but the power grid is still reliable"-mostly due to reduced economic activity. In this paper, we analyze electricity data until the end of May 2020, examining both electricity demand and variables that can indicate stress on the power grid. We limit this study to three states in the USA: California, Florida and New York. The results indicate that the effect of the pandemic on electricity demand is not a simple reduction, and there are noticeable differences among regions analyzed. The variables that can indicate stress on the grid (e.g., daily peak and trough of the hourly demand, demand ramp rate, demand forecast error, and net electricity interchange) also conveyed mixed messages: some indicate an increase in stress, some indicate a decrease, and some do not indicate any clear difference. A positive message is that some of the changes that were observed around the time stay-at-home orders were issued appeared to revert back by May 2020. A key challenge in ascribing any observed change to the pandemic is correcting for weather as it can be challenging to accurately define it for large geographic regions. We provide a weather-correction method, apply it to a small city-wide area in North Central Florida, and discuss the implications of the estimated changes in demand. The results indicate that a 10% (95% CI=2%-16%) increase in electricity demand is likely to have occurred due to COVID-19 for the city analyzed.
Construction industry activities, from material extraction to the end of the structure life, affect the environment negatively. For a sustainable construction process, economically, environmentally, and socially friendly practices are essential, and reverse logistics is one solution that can provide such an approach. In reverse logistics, obsolete products are reused in a new production, while reducing negative effects to the environment. In this study, we assess the current state of research on reverse logistics practices in the construction industry. The study presents a comparative data mining analysis, followed by a content analysis. The results show that the construction industry literature ignores the impact of reverse logistics practices on upstream construction activities. We argue that industry practitioners must take reverse logistics decisions in the early phases of the construction process by considering both upstream and end-of-life construction activities, and we recommend a reverse logistics decision framework for successful reverse logistics implementation. The findings of this research are significant for decision-makers in the industry. We urge that sustainable practices be employed in the industry. Furthermore, a quantitative analysis is suggested to strengthen the arguments made in this article.
Managing supply chain performance is essential for value generation to stakeholders. Nonetheless, this process has become overly complicated due to environmental concerns that lead to policy changes, customer preferences, and business activities. Reverse logistics is an environmentally friendly practice that can be critical in improving the environmental performance of construction operations. This paper examines the perceived role of reverse logistics practices on supply chain performance criteria—for example, cost, quality, time, flexibility, and environment. Semistructured in‐depth interviews were conducted with 15 senior industry experts from South East Queensland, Australia. Interview transcripts were analyzed by coding, categorizing, and identifying the interconnected relationships among concepts. In general, the experts perceive that reverse logistics practices significantly reduce the sourcing cost of materials compared with new materials. When used materials meet industry specifications, they are expected to have a similar performance without affecting the construction time or the overall quality of the project while protecting the environment. Nevertheless, the flexibility is found to be somewhat difficult. It is likely that reverse logistics can be instrumental in construction should the industry uptake be substantial with an emphasis on used material quality and acceptance criteria. Hence, a quantitative analysis is encouraged for future research.
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