Search

During the last three years, numerous research papers have been reported which use social media data to explore several issues related to the COVID-19 pandemic. Bibliometric methods in this work are used to analyze 1427 peer-reviewed documents from the last three years extracted from the Web of Science database. The results of this study show that there was high growth in publications in open access journals with an annual rate reaching 19.3% and they also identify the top cited journals and research papers. The thematic analysis of papers shows that research topics related to social media for surveillance and monitoring of public attitudes and perceptions, mental health, misinformation, and fake news are important and well-developed, whereas topics related to distance-learning education with social media are emerging. The results also show that the USA, China, and the UK have published many papers and received a high number of citations because of their strong international collaboration. [ABSTRACT FROM AUTHOR]

Electrical impedance tomography (EIT) applications have been progressed in technology and applications, and EIT began to be used in multiple clinical and experimental scenarios including pulmonary, brain,tissues monitoring etc. This study explores the emerging trends and hot topics concerning applications on EIT in extrapulmonary applications by bibliometrics analysis. 443 research articles, reviews, letters, and proceeding papers etc. published from 1987 to 2021 in English were analyzed from a global perspective, covering global publications, cooperation between countries, and clustering of keywords. The global annual publications on extrapulmonary applications gradually increased slowly in the last 30 years, and USA, UK and China ranked as the top three prolific contributors in keywords of EIT extrapulmonary applications. "cutaneous melanoma","breast cancer detection","brain" were research hotspots. Overall, EIT extrapulmonary applications bibliometrics analysis gives us a unique insight to identify scientific advances, hot spots, research trends, and provide future directions of EIT in extrapulmonary applications. [ABSTRACT FROM AUTHOR]

This article has reviewed the international research from the 20th century to the first half of 2019 on the terms "efficiency" and "local government". For this purpose, a bibliometric and a cluster analysis by fractional accounting have been carried out using two of the most important databases: Web of Science (WoS) and Scopus. The research found and studied 1222 documents from the WoS Core Collection and 2264 from Scopus. The results show a continuous increase in the number of published articles and citations during the whole period. It also found that the U.S., U.K, and China are the most productive countries with a predominance of North American and Asian organizations supporting and fostering researches. The principal contribution of this article is the analysis of keywords from 2011 to the first half of 2019. The trend shows a convergence on the concepts of efficiency and local government over the last few years, which are related to sustainability and natural environment. Future research in this field should address the relationship between efficiency in the allocation of local resources and the environmental sustainability of municipalities. • A bibliometric review of local government efficiency was conducted. • The paper identifies publications that serve as a guide to the local policymakers. • A recent worldwide trend in this field is based on environment. • A pending subject of local government efficiency is a geopolitical analysis. [ABSTRACT FROM AUTHOR]