Sinkhole Stability in Elliptical Cavity under Collapse and Blowout Conditions

Material-Point Simulation to Cavity Collapse Under Shock

The collapse of cavities under shock is a key problem in various fields ranging from erosion of material, ignition of explosive, to sonoluminescence, etc. We study such processes using the material-point-method developed recently in the field of solid physics. The main points of the research include the relations between symmetry of collapsing and the strength of shock, other coexisting interfa...

assessing political stability and instability in central asia and caucasus; case study, azerbaijan and kyrgyzstan

منطقه ی آسیای مرکزی وقفقاز به عنوان منطقه ای تاریخی و به دلیل دارا بودن ذخایر عظیم هیدرو کربنی از اهمیت ویژه ای برخوردار است. کشورهای این منطقه از عوامل عمده ی بی ثباتی نظیر عوامل جغرافیایی، اقتصادی، امنیتی، اجتماعی و سیاسی رنج می برند. پس از فروپاشی اتحاد جماهیر شوروی کشورهای منطقه از نعمت استقلال ناخواسته ای برخوردار شدند که مشکلات فوق را برای آن ها چندین برابر می کرد. در این روند برخی از این...

Rock Stability under Different Fluid Flow Conditions

Stability of Plasma Polymers Under Various Conditions

In the first part of this paper, stability in the open air and ageing of plasma polymer films is concisely reviewed. Nanocomposite films metal/plasma polymer are shortly discussed. Their ageing is considered. Future work on more complex composites such as Sn or SnO2 /plasma polymer films is outlined.

Cavity modes and their excitations in elliptical plasmonic patch nanoantennas.

We present experimental and theoretical studies of two dimensional periodic arrays of elliptical plasmonic patch nanoantennas. Experimental and simulation results demonstrate that the azimuthal symmetry breaking of the metal patches leads to the occurrence of even and odd resonant cavity modes and the excitation geometries dependent on their modal symmetries. We show that the cavity modes can b...