Spontaneous emission of an atom (molecule) placed near a nanocylin-der of elliptical cross-section of an arbitrary composition is studied. The analytical expressions have been obtained for the radiative and nonradia-tive channels of spontaneous decay and investigated in details.

The study of sound attenuation in an elliptical chamber involves the solution of the Helmholtz equation in elliptic coordinate systems. The Eigen solutions for such problems involve the Mathieu and the modified Mathieu functions. The computation of such functions poses considerable challenge. An alternative method to solve such problems had been proposed in this paper. The elliptical cross-sect...

Undulators as the sources of high-brilliance synchrotron radiation are widespread interest in new generations light and free-electron lasers. Microwave propagation a plasma-filled elliptical waveguide can be studied standard short-period undulator. This structure lucrative insertion device installed storage ring third- fourth-generation to produce high-energy radiation. In this article, transve...

0017-9310/$ see front matter 2011 Elsevier Ltd. A doi:10.1016/j.ijheatmasstransfer.2011.04.028 ⇑ Corresponding author. E-mail addresses: [email protected], maa59@ URL: http://www.mohsenakbari.com (M. Akbari). This paper outlines a novel approximate model for determining the pressure drop of laminar, singlephase flow in slowly-varying microchannels of arbitrary cross-section based on the solu...

The article is devoted to the determination of thermal stresses in a flat plate solar collector and calculation its optimal size. solution found when moving an elliptical coordinate system. obtained result useful because by varying geometric shape cross-section, it possible reduce level that occur, and, consequently, increase reliability durability design.