The modern transmission and distribution network relies on SF6 technology because of its remarkable arc quenching properties and dielectric insulation (approximately 3 times greater than air). However, even if SF6 Switchgears are safe for the environment, the SF6 insulating gas has potential significant environmental impacts if it leaks into the atmosphere. Indeed SF6 is one of the six gases li...

IN 1946 von Euler and Liljestranld' demonstrated that the pulmonary artery pressure in the eat was increased when the animal breathed a gas mixture of low oxygen content. Comparable results have been demonstrated in other species, including man.2 4 In spite of a degree of variability in the results of experiments designed to elucidate the mechanism of this response, most studies suggest that hy...

compressibility factor and viscosity of natural gasses are of great importance in petroleum and chemical engineering. to calculate the natural gas properties in the pipelines, storage systems and reservoirs, the exact values of gas compressibility factor and viscosity are required. a new method that allows accurate determination of compressibility factor and gas viscosity for all types of: swee...

IN 1946 von Euler and Liljestranld' demonstrated that the pulmonary artery pressure in the eat was increased when the animal breathed a gas mixture of low oxygen content. Comparable results have been demonstrated in other species, including man.2 4 In spite of a degree of variability in the results of experiments designed to elucidate the mechanism of this response, most studies suggest that hy...

The influence of nitrous oxide (N2O) narcosis on the response to exercise and inspiratory resistive loading was studied in thirteen male US Navy divers. Each diver performed an incremental bicycle exercise test at 1 ATA to volitional exhaustion while breathing a 23% N2O gas mixture and a nonnarcotic gas of the same PO2, density and viscosity. The same gas mixtures were used during four subseque...

In the most application of nozzle with gas-liquid two-phase flow, the quality of mixture in exhaust of nozzle is the most important parameter as well as the flow velocity. On the other hand, in some industrial application, such as water injection in forced induction (turbocharged or supercharged) internal combustion engine the spray quality is the main goal of designing. In this case and for im...

In this study, a new silica gel based adsorbent was fabricated and its ability in separation and quantification of alkanes mixture was investigated. Silica gel (SiO2) is a polar absorbent which is mainly used to separate polar compounds. Also, the carbon materials such as activated carbon and recently carbon nanotube (CNTs), have been widely used for separation of nonpolar materials. Carbon nan...

Tungsten oxide (WOx) thin film, which is well known as an electrochromic display, was deposited on the ITO film coated flexible substrates using the RF magnetron sputtering method. Phenomena of processing plasmas, the film quality and the electrochromic properties of deposited WO3 thin film have been studied as parameters of a gas pressure and gas mixture. Experimental results suggest that depo...

In this paper we compare the accuracy of a range of advanced density models for gas identification from sensor array signals. Density estimation is applied in the construction of classifiers through the use of Bayes rule. Experiments on real sensors data proved the effectiveness of the approach with an excellent classification performance. We compare the classification accuracy of four density ...