Concentric cavity

The cavity concentration, C, is then calculated as a fraction of the plume content using the following empirical formula ... 

Tires were mounted and inflated to the maximum pressure listed on the sidewall prior to oven aging using either air or a 50/50 blend of N2/O2. In the case of tires inflated with the 50/50 blend of N2/O2, the atmospheric air present was not purged the blend was added on top of it yielding a tire cavity concentration of approximately 41%-44% O2. Two of the tires in this study (SUV/Minivan-A and SUV/Minivan-C) were aged at 50°C, 60°C, and 70°C for up to eight weeks, while the tires and... 

Steady state acoustic response of the unit cell occurred for the composites considered after the passage of some five acoustic oscillations. Patterns of direct stress, and shear stress as shown in Figures 2 and 3 were obtained. As expected, the corners of the cavities concentrated the stresses. Viscoelastic energy loss calculations, not discussed here, also show that the corners of the cavities are concentrations of energy losses. 

Deformation Process. The function of the rubber in PA-rubber blends is to create stable cavities upon loading. Because of cavitation, the von Mises effective stress in the matrix strongly increases and plastic deformation is possible (I, 20). The von Mises stress in a cavitated system is a function of cavity concentration. The cavity size does not play a role in this mechanism. 

Paul J B, Collier C P, Saykally R J, Scherer J J and O Keefe A 1997 Direct measurement of water cluster concentrations by infrared cavity ringdown laser absorption spectroscopy J. Phys. Chem. A 101 5211-14... 

As a result of the concentration of acidic species, such as chloride and sulfate, material scraped from the inside of tubercles is virtually always acidic when mixed with water. Acidity varies not only from tubercle to tubercle but also from place to place in a given tubercle. Acidity is greatest near the corroded metal surface. The size of the fluid-filled cavity can indicate acidity. The larger the cavity, the more acidic the internal environment. 

For u, a value of one-half the stack height critical wind speed is used, but not greater than 10 m/s and not less than 1 m/s. Thus, the calculation of Xc is linked to the determination of a critical wind speed. The concentration, Xc is assumed to be uniform within the cavity. 

The carbon-arc plasma of extremely high temperatures and the presence of an electric field near the electrodes play important roles in the formation of nanotubes[ 1,2] and nanoparticles[3]. A nanoparticle is made up of concentric layers of closed graphitic sheets, leaving a nanoscale cavity in its center. Nanoparticles are also called nanopolyhedra because of their polyhedral shape, and are sometimes dubbed as nanoballs because of their hollow structure. 

The interpretation of these remarkable properties has excited considerable interest whilst there is still some uncertainty as to detail, it is now generally agreed that in dilute solution the alkali metals ionize to give a cation M+ and a quasi-free electron which is distributed over a cavity in the solvent of radius 300-340 pm formed by displacement of 2-3 NH3 molecules. This species has a broad absorption band extending into the infrared with a maximum at 1500nm and it is the short wavelength tail of this band which gives rise to the deep-blue colour of the solutions. The cavity model also interprets the fact that dissolution occurs with considerable expansion of volume so that the solutions have densities that are appreciably lower than that of liquid ammonia itself. The variation of properties with concentration can best be explained in terms of three equilibria between five solute species M, M2, M+, M and e ... 

More recently, activity in the held of the preparation of phthalocyanine-like compounds useful in material science concentrated on compounds containing only one triazole subunit (triazolophthalocyanines) 89 [94JCS(CC)1525 95ICA(230)153].These aromatic compounds (without or with metals in the cavity) present a problem of annular tautomerism of triazoles, but as yet it is known only that the NH is outside the cavity. 

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