Chinese Immigration and the Chinese Exclusion Acts. In the 1850s, Chinese workers migrated to the United States, first to work in the gold mines, but also to take agricultural jobs, and factory work, especially in the garment industry.
Medical Dosimetry. Medical dosimetry is a part of the field of radiation oncology involving knowledge of advanced mathematics, radiobiology, physics and anatomy. In order to shrink or eliminate tumor growth, some patients receive limited doses of radiation internally or externally.
2. Dosimetry systems. The standards are specific about the requirements to the dosimetry systems that are used in connection with the dose mappings: EN 552 (4.3.1). Measurements of absorbed dose shall be performed using a dosimetric system or systems having a known level of accuracy and precision.