A questionnaire relating to smoking habits, respiratory symptoms, and health attitude was administered to schoolchildren aged between 11 and 17 throughout a defined geographical area in both 1975 and 1979, with a valid response from 10498 and 12002 young people respectively. Each cohort was almost entirely different. The results suggest that although the prevalence of regular smoking has decrea...

IN THIS note we extend to the 3-dimensional case the results of M. Kreck on bordism of diffeomorphisms [3]. Some of this work is from the author’s doctoral dissertation [S]. It is a pleasure to acknowledge my indebtedness to Robion Kirby for his insight and encouragement. We also thank the referee for a careful reading and many useful suggestions. First recall the bordism relation for ditfeomor...

During the past decade the application of light pulses in the picosecond time domain has received increasing attention. In these investigations it is of primary interest to know the duration of the ultrashort light pulses. Two methods to measure the pulse duration have found frequent application: The two-photon fluorescence technique, TPF [I] and the streak camera [2]. The autocorrelation patte...

Introduction. Th e growing incidence of oropharyngeal cancer is driven by an increase in frequency HPV-associated cancer. morbidity pattern area-specific. Aim. To analyze the diagnosis and treatment Republic Bashkortostan for 2020. Materials methods. authors carried out a 2020 retrospective analysis results patients with 79 were identified this diagnosis. 84.8% (67/79) among them males 15.2% fe...