It looks like the information you provided is related to citation metrics for a researcher or academic. The numbers represent citation counts, h-index, and i10-index, and there are two sets of values: one for all time and another since 2019.
- Citations:
- All time: 1521
- Since 2019: 742
- h-index:
- All time: 19
- Since 2019: 14
- i10-index:
- All time: 26
- Since 2019: 18
These metrics are commonly used to measure the impact and productivity of a researcher’s work. The h-index is a measure of both the productivity and citation impact of a researcher’s publications, while the i10-index is the number of publications with at least 10 citations.
The numbers since 2019 give a more recent snapshot of the researcher’s impact, possibly indicating their recent contributions and influence in their field.