in this article, modeling and optimization of power consumption of two–stage compressed airsystem has been investigated. to do so, the two – stage compressed air cycle with intercooler offajr petroleum company was considered. this cycle includes two centrifugal compressors, ashell, and a tube intercooler. for modeling of power consumption, actual compressors isentropicefficiencies and intercool...

Breast augmentation surgery has been the most popular cosmetic surgery in the United States since 2006, accounting for 290,000 cases in 2013 [1]. Unfortunately, complications from the procedure can result in a reoperation rate approaching 15.5%. Complications after breast augmentation include capsular contracture, size change, malposition, waviness, deflation, infection, ruptured gel, palpabili...

BACKGROUND AND PURPOSE Adequate depth of cement penetration and cement mantle thickness is important for the durability of cemented cups. A flanged cup, as opposed to unflanged, has been suggested to give a more uniform cement mantle and superior cement pressurization, thus improving the depth of cement penetration. This hypothesis was tested experimentally. MATERIALS AND METHODS The same cup...

Air-conditioning plants With air as working fluid In open cycle have been wtdely employed and they provtde high performances In terms of compactness and low weight. In the on-aboard systems Interesting developments have been obtained as well as In the land applications same good improvements can be expected. As a matter of fact the absolute lack of pollution problems and the compactne:ss can ma...

As any frequent flier is no doubt aware, flight delays and cancellations are a largely inevitable part of commercial air travel. In the past ten years, only twice have more than 80% of commercial flights arrived on-time or ahead of schedule. Punctuality is an issue for all major carriers, with some struggling more than others: through September 2008, American Airlines flights were on time just ...

In increasingly energy-dependent world, there is a question mark over the viability of fossil fuel resources. To tackle this issue, an integrated poly-generation system based on concentrated solar power proposed to feed in city grid and produce hydrogen as clean energy carrier. Concerning COVID-19 outbreak, all countries are dire need oxygen. Therefore, produced oxygen can be considered added v...

The article describes a modified technique of Ribeiro ́s “security flap” described 1973. The existing breast tissue of a mild to moderate ptotic breast is reshaped for restoring upper pole fullness, better projection of the breast mound and improving the nipple-areolar position. Adressing the problem of “bottoming-out” an inferior chest wall based flap is sutured to the pectoralis fascia; after ...