Electromagnetic Disturbances
Mostrando 13-16 de 16 artigos, teses e dissertações.
-
13. Estudo experimental de distorcoes geradas por linhas ferreas eletrificadas em sondagens magnetoteluricas / Disturbances on magnetotelluric data due to electrified railway
Foram realizadas sondagens magnetoteluricas (MT)em perfis ortogonais a Estrada de Ferro Campos do Jordao (EFCJ)na faixa de periodos de 20 a 6000 s. Os perfis situam-se nos estados de Sao Paulo e Minas Gerais, em duas regioes de condutividade contrastantes: a Bacia de Taubate, regiao sedimentar, e a Serra da Mantiqueira, regiao cristalina. A EFCJ opera com co
Publicado em: 2000
-
14. Ordem e caos em plasmas magnetizados
The objective of this thesis is to present a clear understanding of some important nonlinear phenomena that are common in space and laboratory plasmas. Specifically,the present analytical and numerical studies have focused on the properties of electromagnetic turbulence as well as associated coherent structures and chaotic behaviors in a multi-component magn
Publicado em: 1999
-
15. Motor evoked potentials in the preoperative and postoperative assessment of normal pressure hydrocephalus.
Motor evoked potentials and central motor conduction time (CMCT) were examined from both upper and lower limbs in patients with normal pressure hydrocephalus to find a predictor for the success of shunting procedures. The hypotheses that walking disturbances are due to pyramidal tract compression as well as the possibility that the upper limbs are affected s
-
16. Embryological changes induced by weak, extremely low frequency electromagnetic fields.
Fertilized chicken eggs were incubated for 48 hours while exposed to extremely low frequency magnetic fields (ELMF) of 10 Hz, 100 Hz and 1000 Hz with intensities of 0.12, 1.2 and 12 micro T. Gross morphological and histological analysis of the exposed embryos revealed the following effects: (1) ELMF of 100 Hz/1.2 micro T had the most consistent and powerful