## 3 Augmented Reality in Industry
### AR in the Chemical Industry  
Based on the provided data on augmented reality bibliometrics in the chemical industry, we can observe the distribution of publications across different years. Figure 8 illustrates the number of articles published yearly in this specific field. The data indicate a fluctuating trend in publications over the years. There was publication activity in 2013, 2014, 2016, 2017, and 2018, with one article published each year. In 2020, the number increased to two publications, indicating a slight growth in research interest. In 2015 and 2019, there was a declining number of publications, with zero articles published. However, in 2021 the number increased to seven publications, showing growth in this research field. This publication activity fluctuation suggests varying research focus and engagement in augmented reality within the chemical industry. It is worth noting that the lower number of publications in specific years does not necessarily indicate a lack of interest in the topic but could be attributed to factors such as particular research projects, funding availability, or other external influences. Figure 7: Augmented reality in the secondary industry. Regarding the number of publications in the chemical industry related to augmented reality, no specific journals or conference proceedings stood out, as all publications were associated with a single journal or conference. The distribution of scientific production by country reveals that Germany has the highest number of publications, totaling 18 articles. Following Germany, the United States has 12 publications, the United Kingdom has 7, and Italy and Poland have 6 publications each (Figure 9). The remaining countries, including Australia, Turkey, Belgium, China, Cyprus, the Czech Republic, and India, contributed with fewer publications, ranging from one to three article each. It is important to note that these findings suggest Germany's prominence in terms of scientific output in augmented reality research within the chemical industry. The United States, the United Kingdom, Italy, and Poland also demonstrate substantial contributions to the field. However, the other countries mentioned have a relatively lower number of publications in this area. The word cloud presents the recurrence of \"keywords plus\", which are words or phrases that frequently appear in the articles, references, or titles in the sample, and not necessarily in the titles of the articles in the sample. Regarding the researched sample, 40 recurrent \"keywords plus\" were listed. The 10 principal terms can be systematically ranked by frequency to underscore the most prominent keywords within the dataset. \"Generation\" emerges as the most frequently occurring term, with a frequency count of four, indicating its heightened relevance. Closely following are \"augmented reality\" and \"safety\", each with a frequency of three, jointly occupying the second rank. The remaining  
Figure 8: AR publications in the chemical industry over the years. Figure 9: Countries’ scientific production. terms--\"challenges\", \"cyber-physical systems\", \"design\", \"framework\", \"knowledge\", \"smart\", and \"virtual reality\"--each have a frequency of two, collectively constituting the third rank. This frequency-based ranking reveals that \"generation\", \"augmented reality\", and \"safety\" are the most salient terms, suggesting their critical role within the dataset (Figure 10). Making a qualitative analysis of the applications in the published articles, it is possible to observe the different uses intended for the chemical industry and augmented reality (Table 1) over time.