The themoelastic properties of Mg2SiO4 ringwoodite at mantle pressure and temperature conditions are reported based on ab nitio molecular dynamic simulations. A third-order Birch–Murnaghan equation at a reference temperature of 2000 K is defined by 0 = 138 GPa, K′ 0 = 5.2, and V0(2000 K) = 560.3 Å3. The Grűneisen parameter is determined to be γ(V) = γ0(V/V0(298 K))q with 3 δT 0 = 1.22 and q= 1....

In this work we analyze a solution that mimics the Bardeen with cosmological constant surrounded by quintessence. We show can be obtained Einstein equations coupled nonlinear electrodynamics. also is not always regular and what conditions for regularity are. thermodynamics associated type of establishing form Smarr formula first law thermodynamics. obtain some thermodynamic quantities such as p...

We have studied numerically the so-called Bondi-Hoyle (wind) accretion on to a rotating (Kerr) black hole in general relativity. We have used the Kerr-Schild form of the Kerr metric, free of coordinate singularities at the black hole horizon. The ‘test-fluid’ approximation has been adopted, assuming no dynamical evolution of the gravitational field. We have used a recent formulation of the gene...

the bottom trawl selectivity parameters (22mm cod-end mesh size) were determined for saurida undosquamis , mullus barbatus , upeneus pori , and pagellus erythrinus along karatas coasts of turkey in northeastern mediterranean waters during fishing season for the year 2002-2003. the lengths at first capture (l 50 ) values for s. undosquamis , m. barbatus , u. pori and p. erythrinus were 12.57, 9....

Abstract As a production method of low wells and remote oil wells, bailing recovery is particularly important for its reasonable working system. The dimensionless bottom hole flowing pressure solved by establishing the seepage mechanics equation infinite homogeneous formation, productivity bailed well predicted using direct relationship between unit flow rate. On this basis, mathematical model ...