There was an attempt to find an analytic expression3, however that paper contains an error in the application of the boundary conditions. More recently, Gelmont and Shur4, found an analytic expression for very thin substrates and presented the result of a more general numerical solution. They showed that the formula above was inaccurate for the range of the ratio of substrate thickness to conta...

In order to analyze the temperature distribution of circuit breaker tulip contact, a thermal field simulation model for contact is built combined with electromagnetic-stress-thermal coupled finite element and virtual material method which models resistance characteristics contact. The rise characteristic contacts under rated current conditions short-circuit analyzed model. Results show that can...

background: the rationale was to develop an ablation approach to destroy regions of tumor resistant to radiation and thus reduce the time required for whole tumor ablation, while improving overall tumor control after radiotherapy. materials and methods: the system is composed of a micro positron emission tomography (mpet), 7t magnetic resonance imaging (mri), and a customized mri-compatible foc...

This paper reports on a comparison of gold and gold–nickel alloys as contact materials for microelectromechanical systems (MEMS) switches. Pure gold is commonly used as the contact material in low-force metal-contact MEMS switches. The top two failure mechanisms of these switches are wear and stiction, which may be related to the material softness and the relatively high surface adhesion, respe...

Breaking electric contact has been made for closing the circuits, respectively for taking over the temporary current conduction or for the long time conduction also for re-opening the closed electric circuit, putting out the current in this way. Although the contacts are the small parts of equipment volume in which they were mounted, there are complex exigencies and obviously different from cas...

One of the great enemies of rubber compounds is heat. Heat will cause chemical and physical degradation of vulcanized rubber as well as a considerable loss in its strength. A major source of heat generation in a tire is due to internal friction resulting from the viscoelastic deformation of the tire as it rolls along the road. Another source of heat generation in a tire is due to its contact fr...

One of the great enemies of rubber compounds is heat. Heat will cause chemical and physical degradation of vulcanized rubber as well as a considerable loss in its strength. A major source of heat generation in a tire is due to internal friction resulting from the viscoelastic deformation of the tire as it rolls along the road. Another source of heat generation in a tire is due to its contact fr...

Single-walled carbon nanotubes (CNTs) printed into thin films have been shown to yield high mobility, thermal conductivity, mechanical flexibility, and chemical stability as semiconducting channels in field-effect, thin-film transistors (TFTs). Printed CNT-TFTs of many varieties have been studied; however, there has been limited effort toward improving overall CNT-TFT performance. In particular...

CuO nanowires (NWs) were grown by the thermal oxidation of Cu foil at 400 ◦C and gas sensors were fabricated by the deposition of a solution containing the CuO NWs. At 300–370 ◦C, the sensor resistance increased upon exposure to 30–100ppm CO. This has been explained by the gas sensing characteristics of the p-type oxide semiconductor. In contrast, the sensor showed two opposite NO2 sensing beha...