Measurements of sound output as a function of blowing pressure are reported for a group of experienced trumpet players. The study identifies several common features, namely (1) a threshold blowing pressure approximately proportional to the frequency of the note being played, (2) an extended region in which the sound output rises by about 15 dB for each doubling of blowing pressure, and (3) a sa...

Purpose: To document the development of central retinal vein occlusion secondary to orbital emphysema following nose blowing. Methods: A 55-year-old male developed central retinal vein occlusion secondary to orbital emphysema following nose blowing in the absence of trauma. Results: With conservative management his central retinal vein occlusion resolved over nine weeks period. Conclusion: The ...

A jet with a width of 2.5% the chord length is placed on a NACA0012 airfoil’s upper surface simulating the blowing and suction control under Re = 5 × 105 and angle-of-attack 18-deg conditions. Nearly 300 numerical simulations are conducted over a range of parameters (jet location, amplitude, and angle). The physical mechanisms that govern suction and blowing flow control are determined and anal...

Aluminum metal foam has become an advanced popular material because it excellent mechanical and electrical properties is lightweight. The present work developed the Aluminium specimen using wax powder as a blowing agent through metallurgy method. effect of process parameters such size, stirring speed, sintering temperature, foaming content on behavior specimens been studied experimentally. In d...

We define the concept of blowing up map in rigid analytic geometry and show that such maps exist in full generality by giving an explicit construction. We then derive some elementary properties of blowing up maps, similar to those in the classical case. 0 Introduction and preliminaries 0.

Closed-cell aluminium foams with different compositions have been manufactured starting from powders and also characterized a morphological point of view by means compressive tests in order to determine mechanical properties. Circularity, equivalent diameter, average porosity area such calculated the analysis cross-sections as well specific energy absorption compression tests. Samples higher am...

We consider radial solutions blowing up in infinite time to a parabolicelliptic system in N -dimensional Euclidean space. The system was introduced to describe the gravitational interaction of particles. In the case where N ≥ 2, we can find positive and radial solutions blowing up in finite time. In the present paper, in the case where N ≥ 11, we find positive and radial solutions blowing up in...

Hydrofluorocarbons (HFCs), Perfluorocarbons (PFCs), and Sulphur hexafluoride (SF6) are emitted from a number of end use sectors in which they substitute for ozone-depleting substances. These include refrigeration, air conditioning, aerosol applications, fire suppression, foam blowing, sterilants, and solvents. Emissions of these gases may occur within a year of sale or gradually over several ye...