Somnology Somnology Somnology is the scientific study of sleep. It includes clinical study and treatment of sleep disorders and irregularities. Sleep medicine is a subset of somnology. After the invention of the EEG, the stages of sleep were determined in 1936 by Harvey and Loomis, the first descriptions of delta and theta waves were made by Walter and Dovey, and REM sleep was discovered in 1953. Sleep apnea was identified in 1965. In 1970, the first clinical sleep laboratory was developed at Stanford. The first actigraphy device was made in 1978 by Krupke, and continuous positive airway pressure therapy and uvulopalatopharyngoplasty
Society for the study of the native land (Chuvashia) Society for the study of the native land (Chuvashia) Society for the study of the native land (SSNL) is an association of ethnographers of Chuvashia to study the local region. The Company distributes scientific data on native land, introduces the population of the republic with the life and culture of the peoples of the country. In the society functioned sections: natural-historical, historical, archaeological, ethnographic, socio-political, artistic and literature, scientific and educational, organizational and instructors, information, since 1925 – a constitutional section. In the first year in the community was 51 members., In 1924 – 90, in 1926 – 155, including