In an oil field that has reached its maximum gas handling capacity, and where wells are producing under gas coning conditions such that the gas-oil ratio (GOR) depends on the wells production rate, oil production is maximized if the marginal GOR (mGOR) is equal for all wells. The GOR and the mGOR are not readily available measurements, but they can be predicted using detailed reservoir models. ...

We perform a feasibility study on the likelihood of seismically detecting and interpreting the time-varying changes in a North Sea reservoir during solution-gas-drive oil production from a horizontal well. This study integrates reservoir engineering fluid-flow simulations, rock physics measurements and transformations, and prestack seismic modeling and migration on a real but anonymous North Se...

Two children presented with a first episode of diabetic ketoacidosis. Initially both patients made a good clinical and biochemical recovery, but suddenly developed neurological signs consistent with a diagnosis of tentorial herniation. Cranial computed tomography showed signs of cerebral oedema in both cases with evidence of uncal and tentorial herniation in 1 patient, which resolved after the ...

A basic problem in flight dynamics is the mathematical formulation of the aerodynamic model for aircraft. This study is part of an ongoing effort at NASA Langley to develop a more general formulation of the aerodynamic model for aircraft that includes nonlinear unsteady aerodynamics and to develop appropriate test techniques that facilitate identification of these models. A methodology for mode...

Lipschitz k-connectivity, Euclidean isoperimetric inequalities, and coning inequalities all measure the difficulty of filling a k-dimensional cycle in space by (k+1)-dimensional object. In many cases, such as Banach spaces CAT(0) spaces, it is easy to prove connectivity or inequality, but harder obtain inequality. We show that finite Nagata dimension, connectedness implies imply inequalities. t...

Micro-Doppler is regarded as a unique signature of target with micro-motions. The sophisticated recognition the cone-shaped targets can be realized through micro-Doppler effect. However, it difficult to extract micro-motion features perpendicular radar line sight (LOS) effectively. In this paper, parameters extraction method put forward based on rotating antenna. First, new configuration propos...

Effects of static attitude and three different motions on vortex behavior and its breakdown over delta wings have been investigated. These motions include 1) harmonic oscillation or ramp-and-hold motion in roll at constant resultant angle of attack, 2) harmonic oscillation or ramp-and-hold in pitch and 3) coning at constant resultant angle of attack A basic 65° delta wing configuration was test...