Simple analytical method for determining electrical resistivity and sheet resistance using the van der Pauw procedure.

This work reports an analytical method for determining electrical resistivity (ρ) and sheet resistance (RS) of isotropic conductors. The method is compared with previous numerical solutions and available experimental data showing a universal behavior for isotropic conductors. An approximated solution is also reported allowing one to easily determine ρ and RS for samples either with regular or arbitrary shapes.

[Prevalence study of hypertension among students at the Medical Science Department of the University of Taubaté]. / Estudo da prevalência de hipertensão arterial em acadêmicos do Departamento de Ciências Médicas da Universidade de Taubaté.

PURPOSE: To study the prevalence of hypertension related on the exposition to the main risk factors. METHODS: We studied 153 students of the Medical Science Department of Taubaté University, aged between 17 to 35 years. The chosen method was the stratified simple aleatory sample. RESULTS: The prevalence of hypertension was 5.88% where all of them had one or more risk factor. A significant systolic blood pressure increase in male was found by comparing to the female. CONCLUSION: The risk factors considered alone, did not change the mean value of the hypertension, while the obesity when associated with one or more risk factors showed a considerable increase on the averages of diastolic blood pressure.

[Dilantin gingival hyperplasia: patient evaluation in relation to anticonvulsant dosage, degree of oral hygiene and extension of lesion]. / Hiperplasia gengival dilantínica: avaliação do paciente com relação à dosagem de anticonvulsivante, grau de higiene bucal e extensão da lesão.

The authors examined 42 exceptional children interned in an especialized school viewing to determine the degree of gingival hyperplasia and it relation to the degree of oral hygiene, the lesion extension and the drug taken. All children were examined without verifying if they were taking any type of medicine. In the comparison of clinical exames of children taking anticonvulsants, the conclusion was that the gingival hyperplasia was present in 46.8% of the cases, as well as the extension of it being larger when the drug had been administrated for a long period and/or when oral hygiene was inadequate.