COVID-19 History of engineering & technology 14 Technology: general issues 14 pandemic 5 artificial intelligence 4 machine learning 4 COVID-19 Pandemic, 2020- 3 Environmental science, engineering & technology 3 convolutional neural networks 3 prediction 3 random forest 3 sustainability 3 uncertainty 3 CO2 2 COVID-19 pandemic 2 GRU 2 Industry 4.0 2 Influence 2 Internet of Things (IoT) 2 Pandemic 2 Social conditions 2 accessibility 2 ageing 2 balance 2 benchmarking 2 biomass 2 blockchain 2 climate change 2 computer vision 2 deep learning 2