The nature of gas flow in pipes and ducts changes with the gas pressure and its description is generally divided into three parts or regimes. The flow dynamics are characterized by A, the molecular mean free path, in relation to some characteristic dimension such as the diameter of a pipe. The flow regime cannot be determined from the mean free path alone but only from the relation of this para...

We have investigated by first principles the compressional behavior of low-pressure (LP) and highpressure (HP) MgSiO3 clinoenstatite. We have carefully examined unit-cell shapes, chain angles, and polyhedral volume responses, such as angle variances and quasi-elongations, under pressure at room temperature. We have observed opposite behavior of the tetrahedra in the S-rotated and O-rotated chai...

We combine density-functional theory with the string method to calculate the minimum free energy path of bubble nucleation in two polymer–CO2 mixture systems, poly(methyl methacrylate) (PMMA)–CO2 and polystyrene (PS)–CO2. Nucleation is initiated by saturating the polymer liquid with high pressure CO2 and subsequently reducing the pressure to ambient condition. Below a critical temperature (Tc),...

conclusions by preventing unnecessary termination of pregnancy and keeping fit, the chances of lbw can be reduced. background lbw rate is one of the most important health indices in every society. it reveals mothers and their new-born infants' health. objectives our aim, in the present paper, was to present a new statistical framework for analysis based on path analysis techniques. patients and...

let g be a (p, q) graph. let k be an integer with 2 ≤ k ≤ p and f from v (g) to the set {1, 2, . . . , k} be a map. for each edge uv, assign the label |f(u) − f(v)|. the function f is called a k-difference cordial labeling of g if |νf (i) − vf (j)| ≤ 1 and |ef (0) − ef (1)| ≤ 1 where vf (x) denotes the number of vertices labelled with x (x ∈ {1, 2 . . . , k}), ef (1) and ef (0) respectively den...

Since the collisional mean free path of charged particles in hot accretion flows can be significantly larger than typical length-scale flows, gas pressure is anisotropic to magnetic field lines. For such a large path, resistive dissipation also play key role flows. In this paper, we study dynamics presence pressure. We present set self-similar solutions where flow variables are assumed function...

Abstract We report experimental speeds of sound in methanol. Measurements were conducted at temperatures from 233 to 353 K with pressures up 20 MPa using the double-path length pulse-echo technique. The relative expanded combined uncertainty ( k = 2) measurement was estimated vary 0.012 0.014%, considering contributions temperature, pressure, path calibration, pulse timing, and purity sample. E...

We report on the development and application of a broadband absorption spectrometer utilizing a pulsed supercontinuum laser light source and dispersion compensating fiber with a single-pass absorption path to obtain absolute methane mole fractions in a laminar nonpremixed CH(4)/air flame supported on a Wolfhard-Parker burner. The basic principle of supercontinuum broadband absorption spectrosco...

Persistent pain, disability, and depression are hallmarks for chronic pain. While disparities based upon race, gender, and class are documented, little is known about pain disparities in minority men. This investigation examines black (6.2%) and white (93.8%) men (N = 1650) presenting for initial assessment at a tertiary care pain center. Racial comparisons utilized analysis of variance; all va...