4 documents found, page 1 of 1
Motion in rotating Earth: exact solutions and second-order effects of noninerti...
Diniz,Eduardo MoraesThe motion of a particle evaluated from the noninertial frame of the rotating Earth with constant angular velocity ω is solved analytically without carrying out a priori approximations, that is, considering both the Coriolis and the centrifugal terms. Position vector solutions written in terms of generic initial conditions were obtained from a decoupled sixth-order equation of motion, obtained using a fully vec...
Delay in death reporting affects timely monitoring and modeling of the COVID-19...
Carvalho,Carolina Abreu de; Carvalho,Vitória Abreu de; Campos,Marcos Adriano Garcia; Oliveira,Bruno Luciano Carneiro Alves de; Diniz,Eduardo MoraesThis study describes the COVID-19 death reporting delay in the city of São Luís, Maranhão State, Brazil, and shows its impact on timely monitoring and modeling of the COVID-19 pandemic, while seeking to ascertain how nowcasting can improve death reporting delay. We analyzed COVID-19 death data reported daily in the Epidemiological Bulletin of the State Health Secretariat of Maranhão and calculated the reporting...
Excess deaths from all causes and by COVID-19 in Brazil in 2020
Santos,Alcione Miranda dos; Souza,Bruno Feres de; Carvalho,Carolina Abreu de; Campos,Marcos Adriano Garcia; Oliveira,Bruno Luciano Carneiro Alves deABSTRACT OBJECTIVE To estimate the 2020 all-cause and COVID-19 excess mortality according to sex, age, race/color, and state, and to compare mortality rates by selected causes with that of the five previous years in Brazil. METHODS Data from the Mortality Information System were used. Expected deaths for 2020 were estimated from 2015 to 2019 data using a negative binomial log-linear model. RESULTS Excess deaths...
O oscilador linearmente amortecido revisitado
Diniz,Eduardo MoraesResumo O oscilador harmônico amortecido por atrito de contato superficial é revisitado com uma descrição física e matemática mais robustas e abrangentes. Várias propriedades do sistema são apresentadas e discutidas, como a solução para o caso geral de condições iniciais, envoltórias do movimento, número exato de oscilações, dissipação instantânea e média de energia, fator de mérito, diagrama de fase dentre outr...