Spaceflight radiation carcinogenesis gamma rays that produce the same biological effect are called relative biological effectiveness (RBE) factors. The types of tumors in humans who are exposed to space radiation will be different from those who are exposed to low-LET radiation. This is evidenced by a study that observed mice with neutrons and have RBEs that vary with the tissue type and strain. The various approaches to setting acceptable levels of radiation risk are summarized below: NCRP Report No. 153 provides a more recent review of cancer and other radiation risks. This report also identifies and describes the information needed to make radiation
Levitin effect Levitin effect The Levitin effect refers to the phenomenon, first documented by Dr. Daniel J. Levitin in 1994, that people – even those without musical training – tend to remember songs in the correct key. The finding stood in contrast to the large body of laboratory literature suggesting that such details of perceptual experience are lost during the process of memory encoding. In other words, laboratory experiments supported the idea that most people are incapable of any sort of absolute pitch, and thus would remember melodies with relative pitch. Despite its status as a classic result in cognitive psychology, the