A Conceptual Framework for Heritage Impact Assessment: A Review and Perspective

Heritage Impact Assessment (HIA) has recently emerged as a conflict-solving tool to improve World Heritage (WH) conservation in line with sustainable development policies. The increasing number of requested HIAs for affected WH properties over the last years reveals that more attention is being paid to HIA as a practical tool to adequately support the protection and management of historic monuments and sites against new constructions and development. However, the application of integrated and systematic impact assessment methods within HIA still remains a key challenge in different HIA projects. Therefore, this paper contributes to the further development of a transparent and systematic procedure of HIA in accordance with Environmental Impact Assessment (EIA). It also explores different standard methods of impact assessment in EIA and discusses their applicability to cultural World Heritage properties. Finally, the paper emphasizes a need for developing integrated impact assessment methods to address the multiple impacts of development projects. Such methodological enhancement can further contribute to mitigation strategies and decision-making to protect World Heritage properties within the context of sustainable development.

COVID-19 Pandemic Effect on Energy Consumption in State Universities: Michoacan, Mexico Case Study

The COVID-19 pandemic has generated multiple impacts. In particular, in the educational sector, the virtual class modality generated changes in the patterns of energy consumption at the institutional level; the identification of this consumption will allow us to reflect on new energy saving and efficient use strategies. In this research, we present a case study of the effects of the COVID-19 pandemic on electricity consumption in 13 state universities in Michoacán, Mexico. Electric energy consumption has been evaluated before and during the presence of the COVID-19 between 2019 and 2020. The comparative analysis estimated the reduction in energy consumption and its economic and environmental impact. The results show a considerable decrease in electricity consumption, generating an average saving of 76.24 MWh/month, which translates into an annual emission reduction from 2019 to 2020 of approximately 497 TnCO2e, and in economic terms of $ 8,882.25 USD each month. In general, it was identified that consumption patterns in the use of machinery and computer equipment for administrative activities were drastically reduced. If education continues in virtual or hybrid modes, energy consumption schemes will continue to decline and institutions could move towards resilient, affordable, and sustainable models of energy production and consumption.

The Multiple Impacts of the COVID-19 Pandemic on China’s Oil Security and the Rising Green Opportunities

The COVID-19 pandemic has seriously challenged the global oil market, and coronavirus-induced oil prices crash, oil demand decline and global economic recession affect China’s oil supply as well. China has high oil vulnerability due to its rising oil import dependency which aggravates Beijing’s concerns about oil security, despite at a time of the pandemic-induced oil oversupply. This study uses the SWOT analytical model to identify the strengths, weaknesses, opportunities and threats in China’s oil sector, and the changes in opportunities and threats caused by the COVID-19 pandemic. The pandemic has brought multiple impacts to China’s oil security. Results from the analysis show that the existing opportunities such as oil investments in the Belt and Road Initiative (BRI) and domestic upstream opening-up have been weakened; new threats that the uncertainty over global oil demand-supply and decrease in global upstream investments have emerged; opportunities that an increase in domestic strategic petroleum reserve (SPR) and low-carbon development are rising amid the pandemic. Notably, the COVID-19 pandemic has demonstrated the vulnerability of the global oil market to systemic risks and accelerated the transition to renewable energy.

The Multiple Impacts of the COVID-19 Pandemic on China’s Oil Security and the Rising Green Opportunities

The COVID-19 pandemic has seriously challenged the global oil market, and coronavirus-induced oil prices crash, oil demand decline and global economic recession affect China’s oil supply as well. China has high oil vulnerability due to its rising oil import dependency which aggravates Beijing’s concerns about oil security, despite at a time of the pandemic-induced oil oversupply. This study uses the SWOT analytical model to identify the strengths, weaknesses, opportunities and threats in China’s oil sector, and the changes in opportunities and threats caused by the COVID-19 pandemic. The pandemic has brought multiple impacts to China’s oil security. Results from the analysis show that the existing opportunities such as oil investments in the Belt and Road Initiative (BRI) and domestic upstream opening-up have been weakened; new threats that the uncertainty over global oil demand-supply and decrease in global upstream investments have emerged; opportunities that an increase in domestic strategic petroleum reserve (SPR) and low-carbon development are rising amid the pandemic. Notably, the COVID-19 pandemic has demonstrated the vulnerability of the global oil market to systemic risks and accelerated the transition to renewable energy.

Time-Domain Analysis of Tamper Displacement during Dynamic Compaction Based on Automatic Control

Crater depth is a vital issue in dynamic compaction (DC) because it is a controlling parameter in DC and a characterization index of soil properties. A continuous mathematical model capturing the time-domain process of tamper displacement is presented in this paper. The model is simple and the parameters involved are easy to obtain. It was found that the accumulated crater depth increases but its increment in the crater depth decreases with multiple impacts. Three groups of large-scale DC tests with 10,000 kN∙m were conducted to evaluate the performance of the proposed model. The results showed that the proposed model captures the typical trends in the tamper displacement of single and multiple impacts. In addition, a concept of the crater depth ratio is proposed based on the proposed model, and the concept is used to evaluate the efficiency of DC and to predict the optimum tamping number of DCs.

Evaluation of damage within sandwich honeycomb panels subjected to impact fatigue loading

This work was aimed at investigating damage evolution within sandwich panels consisting of aluminum skins and Nomex™ honeycomb core, with three different values of the core densities, subjected to multiple impacts. Repeated impacts at low energy were conducted using an impact fatigue machine. Bending tests were conducted to determine the residual stiffness after impacts in order to analyze the evolution of a damage parameter D. A model was therefore proposed for describing the changes in this parameter as a function of impact cycles N. After repeated impacts, the D(N) curves are characterized by an S-shaped curve. A good agreement is observed between model and experimental results, the maximum standard deviation being less than 7% for different densities. Microscopic observations of the impacted specimens were conducted in order to evaluate the crater growth (associated with permanent indentation). The influence of the number of impacts on the dimensions of the impact zone has also been evaluated. For all the core densities, the permanent indentation gradually increases as a function of impact cycles.