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Lecture 1: Introduction to Epidemiology
Epidemiology is the study of the determinants, distribution, and frequency of disease (who gets the disease and why) I I epidemiologists study sick people I epidemiologists study healthy people I to determine the crucial difference between those who get the disease and those who are spared I
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Lecture 1: Introduction to Epidemiology
www.personal.soton.ac.uksecond example, we have a prevalence of 4 per 10,000 persons. Exercise In a county with 2300 inhabitant there have occurred 2 cases of leukemia. Prevalence? ... deciduous molars were considered. I Potential confounders: sex (female 0 male 1), ethnicity. I Data analysed by Bohning et al. (1999,Journ. Royal Statist. Soc. A ).
Chapter 2 Rutherford Scattering - University of Southampton
www.personal.soton.ac.ukat which point the α-particle would reverse direction, i.e. the scattering angle θwould equal π. On the other hand, if the line of incidence of the α-particle is a distance b, from the nucleus ( bis called the “impact parameter”), then the scattering angle will be smaller. 2.1 Relation between scattering angle and an impact parameter
Chapter 7 Alpha Decay - University of Southampton
www.personal.soton.ac.ukAlpha Decay α- decay is the radioactive emission of an α-particle which is the nucleus of 4 2 He, consisting of two protons and two neutrons. This is a very stable nucleus as it is doubly magic. The daughter nucleus has two protons and four nucleons fewer than the parent nucleus. (A+4) (Z+2) {P} → A Z{D}+ α. 7.1 Kinematics The “Q-value ...
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