This document aims to analyze co-citations with computational tools to identify the research perspectives related to COVID-19 in the areas of business, management, and economy. In addition, a bibliometric analysis is carried out that includes annual productivity, the most relevant authors, countries and institutions, the most cited documents, collaboration networks, and coauthorship. Information obtained from the Web of Science database found 4,347 documents published between the years 2020 and 2021 that were scientifically mapped in this field. An analysis of the research perspectives was carried out. The perspectives were determined through an analysis of co-citations from the application of a clustering algorithm using Gephi. In addition, tools such as Bibliometrix and VOSviewer were used for the development of bibliometric analysis. Through open-access tools, five perspectives related to the impact of COVID-19 on business, management, and economics were found. The first analyzes the effects on financial markets; the second presents the effects on tourism and consumer behavior; the third indicates the socioeconomic effects of applying policies; the fourth presents the environmental and public health impacts; and the fifth shows the impacts on gender.
Thanks to the efforts of different public and private entities, recent years have seen a growing interest in protecting the environment and in the use of non-renewable natural resources such as tires. One of the most widely accepted ways of using non-perishable materials has been their application in the construction of civil works. This paper focuses on the assessment of test tubes made up with mixtures of fi ne-grained Volcanic Ash Soil and Shredded Tires (VAS-TDA) to be applied as an alternative material for low cost lightweight fi lls, that allow the use of the greatest quantity possible of tires. The physical and mechanical properties of specimens made with mixtures of soil and shredded tires were examined, varying the location of the site of soil extraction and tire size (Gravel Size-Sand and Gravel Size). It was determined that test tubes made up of 40% medium-sized shredded tires and 60% soil, reached low dry density values, and that increasing the content of shredded tires leads to greater plasticity and less compressibility. Similarly, resistance diminishes but only up to Californian Bearing Ratio (CBR) values appropriate for use in the nucleus and foundation of an embankment. For test tubes with a maximum content of 15% of type 2 shredded tires, there appeared to be little reduction in the resistance to the mixture, as long as a compaction energy of 2700 kN-m/m 3 is applied.
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