a search using Compendex and National Technical Information Service (NTIS) databases. The information contained in Figure 5-1 shows trends in technology interests by country and geographical region. The identification is by the institutional affiliations of the authors. By comparing the number of publications that have emerged from various countries over the last 30 years, one can see acceleration in research reporting by most of the countries shown in Figure 5-1. While the United States maintained dominance, the contributions from the People’s Republic of China more than doubled during the last decade, to about 12 percent of the total.
The Web of Science has a different list of open-source publications from which to draw. Web of Science is a citation database with multidisciplinary coverage of more than 10,000 high-impact journals in the sciences, social sciences, and arts and humanities, as well as coverage of international proceedings for more than 120,000 conferences. Figures 5.2 through 5.5 reflect the countries whose papers are drawn from this database. The figures comprise both a 30-year and a 10-year look back and were generated using the search criteria “infrared + detect*.” Figure 5-2 is the 30-year compilation. Figures 5-3 through 5-5 are broken down in 10-year periods to show evolving trends.