background pertussis is a respiratory and contagious disease which is mostly caused by bordetella pertussis and b. parapertussis. it usually spreads from person to personduring the incubation or catarrhal phase of the disease. despite of large-scale vaccination, whooping cough is still an endemic disease with several outbreaks. objectives the aim of this study was to determine the prevalence of...

into play the two elements of the CKM matrix which are non real at lowest order: Vub, involved in decays proceeding via a b to u transtion, whose phase is −γ, and Vtd, involved in B B̄ mixing, whose phase is −β. So α = π− β− γ can be measured from CP violating asymmetries in the interference between mixing and decay in charmless decays of the neutral B mesons, such as B → ππ, B → ρρ, B → πππ, an...

objective: children with autism have sitting and on-task behavior problems in class. therefore, the effects of three alternative classroom-seating devices such as regular classroom chairs, therapy balls, and air cushions were examined on students’ classroom behavior. material and method: fifteen autistic students participated in this a-b-a-c multiple treatments, semi-experimental study. student...