RESUMO
The main purpose of this study is to review the Schenberg resonant antenna transfer function and to recalculate the antenna design strain sensitivity for gravitational waves. We consider the spherical antenna with six transducers in the semi dodecahedral configuration. When coupled to the antenna, the transducer-sphere system will work as a mass-spring system with three masses. The first one is the antenna effective mass for each quadrupole mode, the second one is the mass of the mechanical structure of the transducer first mechanical mode and the third one is the effective mass of the transducer membrane that makes one of the transducer microwave cavity walls. All the calculations are done for the degenerate (all the sphere quadrupole mode frequencies equal) and non-degenerate sphere cases. We have come to the conclusion that the "ultimate" sensitivity of an advanced version of Schenberg antenna (aSchenberg) is around the standard quantum limit (although the parametric transducers used could, in principle, surpass this limit). However, this sensitivity, in the frequency range where Schenberg operates, has already been achieved by the two aLIGOs in the O3 run, therefore, the only reasonable justification for remounting the Schenberg antenna and trying to place it in the sensitivity of the standard quantum limit would be to detect gravitational waves with another physical principle, different from the one used by laser interferometers. This other physical principle would be the absorption of the gravitational wave energy by a resonant mass like Schenberg.
Assuntos
Humanos , Feminino , Idoso , Densidade Óssea , Osteoporose , Osteoporose Pós-Menopausa , Pós-Menopausa , Saúde da MulherRESUMO
PIP: 27 pregnant patients with IUDs in situ were diagnosed in health care centers in Belo Horizonte, MG, Brazil. The pregnancies were followed up and analyses of the complications were carried out in 2 groups. Group A consisted of 15 (55.6%) patients that did not have the IUD removed, and Group B consisted of 12 (44.5%) patients that had the IUD removed before the 12th week of pregnancy. 85.2% of the patients were using the Lippes Loop IUD, varying from 1 to 41 months. 48.1% of the patients were in age group 25-29, and 59.2% had between 2 and 3 children. In group A, 53.3% of the patients had spontaneous abortions, comparing with 8.3% in Group B, and 91.7% of the patients in that group had uncomplicated term deliveries. The results showed a significantly higher abortion rate in patients that did not have the IUD removed. The IUD should be removed as soon as possible when pregnancy is confirmed. If it is not possible, the patient should have careful follow-up.^ieng
Assuntos
Aborto Induzido , Aborto Espontâneo , Anticoncepção , Doença , Serviços de Planejamento Familiar , Dispositivos Intrauterinos , Complicações na Gravidez , Projetos de Pesquisa , Fatores Etários , América , Brasil , Países Desenvolvidos , Países em Desenvolvimento , América Latina , População , Características da População , Pesquisa , América do SulRESUMO
Sao analisados 500 tracados de cardiotocografia basal realizados no Hospital Mater Dei em 391 pacientes, com uma media de 1,3 exames por paciente.Estas sao provenientes de clinica privada (50,2%) e de servicos diversos (49,8%).Foram considerados no estudo a idade gestacional, paridade e idade das pacientes. Discutem-se a indicacao, os resultados e o tempo decorrido entre o ultimo exame e o parto. Estudou-se tambem retrospectivamente 249 pacientes das quais 213 apresentaram padrao reativo no ultimo exame. Relacionou-se estes tracados reativos com a ocorrencia de natimortalidade, neomortalidade ou recem-nascido com indice de Apgar menor que sete no 5o. minuto, considerando-os falsos-negativos. O indice obtido foi de 1,4%, compativel com dados da literatura