Digital storage 97 human 79 Humans 52 article 32 Article 30 adult 30 female 30 TK Electrical engineering. Electronics Nuclear engineering 27 male 27 controlled study 24 Information management 21 E-learning 19 Machine learning 19 Deep learning 18 Learning systems 18 machine learning 18 COVID-19 17 Controllers 17 Data acquisition 16 Female 16 digital twin 16 software 16 Blockchain 15 Internet of things 15 Malaysia 15 Performance 15 deep learning 15 procedures 15 Energy efficiency 14 Mapping 14