Gas hydrates on the front burner

WHO puts healthy ageing on the front burner.

“You old people get out and do something!” The advice comes from Felimina Rotundo, who runs a laundry shop in Buff alo, NY, USA. She turned a hundred on Oct 20, 2015, and has been “doing something”—working 11 hours a day, 6 days a week, from dawn to dusk—for the past 85 years. “I talk to people all day”, she tells the journalists gathered in the doorway of her shop. “I get up in the morning and...

Fixpoint Computation: Leaking Gas Burner

Real-time distributed system speciication and veriication in asynchronous propositional temporal logic. Let A be the integrator system deened in Figure 5. We use the xpoint computation procedure to prove that the formula y 60 ! 20t y is an invariant of A. It follows that the gas burner leaks at most one twentieth of the time in any interval of at least 60 seconds. Let R i = hpc = 1 ^ t = 0 ^ x ...

7 Natural Gas Hydrates

Natural Gas Hydrates

Sir Humphry Davy witnessed the first chlorine hydrate crystallizing in 1811. Couple of century later his discovery, natural gas hydrates has begun to play an important role in energy business. From being a mere chemical curiosity, they have proven to be a nuisance for the natural gas industry. The problem of hydrate induced blockage in “wet gas” flow systems has been widely reported and became ...

High-pressure gas hydrates.

It has long been known that crystalline hydrates are formed by many simple gases that do not interact strongly with water, and in most cases the gas molecules or atoms occupy 'cages' formed by a framework of water molecules. The majority of these gas hydrates adopt one of two cubic cage structures and are called clathrate hydrates. Notable exceptions are hydrogen and helium which form 'exotic' ...