We study the optimal temperature to obtain YBa2Cu3O7-δ epitaxial films grown onto SrTiO3 substrates by direct solution deposition. The samples received heat treatment at 820, 840 and 860 °C, then ...characterized by XRD, observing the (00l) profiles; and magnetic susceptibility measurements. The TC-onset for all the samples was 90 K. In addition, the current – voltage (I-V) measurements shows typical tunneling signals corresponding to normal metal-superconducting junctions indicating the films are promising for potential electrical applications.
This article reviews the treatment of chronic sinusitis with macrolides. Chronic sinusitis is often the result of bacterial infections that lead to chronic inflammation with thickening of the sinus ...mucosa and hypersecretion of mucus. In addition to their anti-infective properties, some macrolides possess immunomodulatory effects. These macrolides have been used successfully to treat diffuse panbronchiolitis, a progressive inflammatory lung disease, and may be useful for treatment of asthma, chronic bronchitis, chronic sinusitis, cystic fibrosis, and bronchiectasis. The clinical benefits of macrolides in patients with chronic sinusitis include decreased nasal secretions and postnasal drip, with improvement in nasal obstruction. In vivo and in vitro studies show that some macrolides affect neutrophil chemotaxis and infiltration, inflammatory cytokine production, mucus production, and the transportability of airway secretions. These findings indicate that macrolides are promising agents for treating chronic inflammation of the airways.
To achieve higher performance in spark-ignition engines, the intake and exhaust valves must be controlled in a stepless manner according to the engine speed. Our research group has been continuously ...studying the electromagnetic drive valve system using a linear actuator. We designed a linear actuator with a dual Halbach array of permanent magnets in the stator to increase the thrust of the linear actuator. The thrust characteristics of the proposed model were investigated using electromagnetic field analysis based on the finite element method. The analysis confirmed that the Halbach array concentrates the magnetic flux on the coil side, which generates Lorentz force. From the analysis results, the proposed liner actuator can generate thrust for driving the engine valve, and optimal permanent magnets in stator can be obtained to generate higher thrust.
To achieve higher performance in spark-ignition engines, the intake and exhaust valves must be controlled in a stepless manner according to the engine speed. Our research group has been ...continuously studying the electromagnetic drive valve system using a linear actuator. We designed a linear actuator with a dual Halbach array of permanent magnets in the stator to increase the thrust of the linear actuator. The thrust characteristics of the proposed model were investigated using electromagnetic field analysis based on the finite element method. The analysis confirmed that the Halbach array concentrates the magnetic flux on the coil side, which generates Lorentz force. From the analysis results, the proposed liner actuator can generate thrust for driving the engine valve, and optimal permanent magnets in stator can be obtained to generate higher thrust.
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