Figure 8
The horizontal axis has three markings: 2019 (far left), 2021 (center), and 2023 (far right). The vertical axis is labeled “Term” and shows different topics arranged from top to bottom as follows: “digital technologies,” “digital transformation,” “circular economy,” “industry 4.0,” “industry 4,” “0,” “iot,” “circular business model,” “sharing economy,” “industrialization,” and “eco-design.” The chart uses bubbles positioned along each term’s horizontal line, with lines extending from the start year to the end year for each topic. The size of each bubble corresponds to the term frequency, as indicated by the legend on the right side of the chart. The legend shows that bubble sizes represent frequencies of 100, 200, and 300. The data from the bubbles are as follows: Digital technologies: Year range: 2023 to 2024, Term frequency: 100 in 2024. Digital transformation: Year range: 2023 to 2024, Term frequency: 100 in 2024. Circular economy: Year range: 2021 to 2024, Term frequency: 300 in 2023. Industry 4.0: Year range: 2021 to 2024, Term frequency: 200 in 2023. Industry 4: Year range: 2022 to 2023, Term frequency: 200 in 2022. 0: Year range: 2022 to 2023, Term frequency: 200 in 2022. IoT: Year range: 2020 to 2021, Term frequency: 100 in 2021. Circular business model: Year range: 2021 to 2023, Term frequency: 100 in 2021. Sharing economy: Year range: 2020 to 2022, Term frequency: 100 in 2020. Industrialization: Year range: 2020 to 2022, Term frequency: 100 in 2020. Eco-design: Year range: 2019 to 2020, Term frequency: 100 in 2019. A logo is shown at the bottom right of the chart.Trend topic analysis- Industry 4.0 and circular economy. Source: Constructed based on Biblioshiny software