Established in , PNGV is a research and development initiative involving seven Federal agencies and the three US automobile manufacturers to strengthen US competitiveness. By , develop and validate fuel cell power system technologies that meet vehicle requirements in terms of: cost--competitive with internal combustion engines; and performance, range, safety and reliability.

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Tufaile, Alberto; Sartorelli, José Carlos An anti-bubble is a striking kind of bubble in liquid that seemingly does not comply the buoyancy, and after few minutes it disappears suddenly inside the liquid. Different from a simple air bubble that rises directly to the liquid surface, an anti-bubble wanders around in the fluid due to its slightly lesser density than the surrounding liquid.

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In spite of this odd behavior, an anti-bubble can be understood as the opposite of a conventional soap bubble in air, which is a shell of liquid surrounding air, and an anti-bubble is a shell of air surrounding a drop of the liquid inside the liquid. Two-phase flow has been a subject of interest due to its relevance to process equipment for contacting gases and liquids applied in industry.

A chain of bubbles rising in a liquid formed from a nozzle is a two-phase flow, and there are certain conditions in which spherical air shells, called anti-bubbles, are produced. The purpose of this work is mainly to note the existence of anti-bubbling regime as a sequel of a bubbling system. We initially have presented the experimental apparatus.

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After this we have described the evolution of the bubbling regimes, and emulated the effect of bubbling coalescence with simple maps. Then is shown the inverted slimming klubid dover as a consequence of the bubble coalescence, and finally the conditions for anti-bubble formation.

Теперь Николь тщательно осмотрела убитую мать. Две раны в животе и правом бедре свидетельствовали, что два больших осколка заставили женщину насмерть истечь кровью. Осматривая рану на бедре, Николь ощутила странную опухоль на правой ягодице женщины. Полюбопытствовав, оторвала тело от земли и провела пальцами по опухоли; похоже было, что под кожей имплантирован какой-то твердый объект. Николь извлекла свою медицинскую сумку и небольшими ножницами сделала надрез с одного края опухоли.