Tetyana Vdovina

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Modeling of wave propagation in a heterogeneous medium requires input data that varies on many different spatial and temporal scales. Operator-based upscaling allows us to capture the effect of the fine scales on a coarser domain without solving the full fine-scale problem. The method applied to the constant density, variable sound velocity acoustic wave(More)
In many earth science problems, the scales of interest range from centimeters to kilometers. Computer power and time limitations prevent inclusion of all the fine-scale features in most models. However, upscaling methods allow creation of physically realistic and computationally feasible models. Instead of solving the problem completely on the fine scale,(More)
Operator-based upscaling is a two-scale algorithm that speeds up the solution of the wave equation by producing a coarse grid solution which incorporates much of the local fine-scale solution information. We present the first implementation of operator upscaling for the elastic wave equation. By using the velocity-displacement formulation of the(More)
SUMMARY Phase I of the SEAM Project will produce a variable-density acoustic synthetic survey over a 3D geological model simulating a deepwater subsalt exploration target. Due to the intended use of the data, the project places a premium on accuracy. Commercially produced Phase I synthetics will be spot-checked against benchmark simulations to assure(More)
AIM To characterize clinical and immune disorders in patients with ischemic heart disease (IHD), postinfarction left ventricular remodeling (PLVR), clinical manifestations of chronic cardiac failure (CCF). MATERIAL AND METHODS A comparative clinical controlled trial of immune system was made. The immune system was assessed by diagnostic and prognostic(More)
The well-known radiation solution of the acoustic wave equation may also be viewed as the pressure field in the solution of the first-order system of linear acoustics, in two different ways. The first version casts in the source term as a defect in the acoustic constitutive law, the second presents it as an equivalent body source. The second form requires(More)
AIM To evaluate effects of 6-month therapy with losartan in combination with indapamide on a clinical course, immunological, metabolic parameters, left ventricular function, exercise tolerance and quality of life in patients with coronary heart disease (CHD) associated with metabolic syndrome (MS). MATERIAL AND METHODS Forty six CHD patients with(More)
AIM To evaluate clinico-immunological disorders in patients with ischemic heart disease (IHD) and metabolic syndrome (MS), to study an immunocorrective action of nebivolol during 6-month treatment. MATERIAL AND METHODS A total of 54 patients with postinfarction left ventricular dysfunction and chronic cardiac failure of NYHA functional class II-III were(More)
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