7,436 research outputs found
Effect of thermally aged oil on space charge dynamics in oil/paper insulation system
No full textThe formation of space charge in oil/paper insulation system can lead to material degradation in the high electrical field region and affect system reliability. Therefore, it is important to understand factors that affect space charge formation in oil/paper insulation system. In the present study the effect of thermally aged oil on space charge dynamics in oil/paper insulation system has been investigated using the pulsed electroacoustic (PEA) technique under different dc electrical fields at room temperature. The condition of oil was characterised. The ultraviolet/visible (UV/Vis) spectrum of oil shifts to visible wavelength and the oil acidity increased as the ageing time increased. It has been found that oil property has a significant effect on the space charge distribution of oil/paper insulation system. The more the deterioration of the oil and the higher the applied voltage, the larger the amount of negative charge injected into the paper near to the cathode and the positive charge accumulated at the paperpaper interface near to the cathode. The maximum electric field strength for oil/paper sample with seriously aged oil under 4kV and 6kV is more than 20% higher than its average electric field strength
Hepatitis C virus NS5A protein down-regulates the expression of spindle gene Aspm through PKR-p38 signaling pathway.
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The psychological approach to the feeding problem of psychomotor retardation child – case report
No full textThe counterbalance between leptin and cortisol may be associated with comorbid depression and anxiety
No full textMedical Care and Rehabilitation Services providing to Children with Cerebral Palsy in Northern Taiwan
No full textPredictors of treatment response and length of stay for inpatients with major depression.
No full textRelationships between mental Health and Job Satisfaction among Employees of a Medical Center Laboratory Medicine Department
No full textPorous orbital implants, wraps, and peg placement in the pediatric population after enucleation.
No full textObsessive-compulsive symptoms as a manifestation of neuropsychiatric systemic lupus erythematosus
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