the purpose of this paper is the generalization of structure factor for rods by polygon section in two dimensional phononic crystals. if we use the plane wave expansion method (pwe) for the propagation of acoustic waves in 2d phononic crystals, structure factor will be an important quantity. in order to confirm the obtained relations, we have calculated the band structure for xy and z vibration...

The title compound, C(10)H(12)N(4)O(2), was prepared as an inter-mediate for the synthesis of metamitron. The benzene ring plane forms dihedral angles of 66.0 (1) and 3.5 (5)° with the hydrazine plane and the acetyl-imino plane, respectively. The crystal structure involves inter-molecular N-H⋯O hydrogen bonds.

Changes in facial expressions or differences in individual faces appear not only in distinctive features such as eyes, nose and mouth but also in the bone structure or the movement of facial muscles. We present a new concept that reflects the differences of the bone structure of a face andlor the movement of facial muscles and name this a face plane. The face plane can be described by a few par...

We have developed a novel electromagnetic bandgap (EBG) structure for suppressing power plane noise that enables unit cell size to be miniaturized by using open stubs as shunt circuits. Since stub length determines the center frequencies of stopbands for this structure, reduced implementation area can be anticipated while maintaining stopbands at lower frequencies. Stopband frequencies were est...

Local structure of the Cu02 plane in Bi2Sr2CaCu208+8 (Bi2212) superconductor has been solved by joint Cu K-edge extended X-ray absorption fine structure (EXAFS) and anomalous X-ray diffraction. The Cu-0 pair distribution function (PDF) has been measured by EXAFS and diffraction. The displacement of the Cu ions along the c-axis shows largest amplitude and anharmonic character. The results show f...

We present experimental evidence for a three-dimensional noncollinear antiferromagnetic spin structure in ultrathin single-crystalline fcc Fe50Mn50 layers using magnetic circular dichroism photoelectron emission microscopy and x-ray magnetic linear dichroism. Layer-resolved as-grown domain images of epitaxial trilayers grown on Cu(001) in which FeMn is sandwiched between ferromagnetic layers wi...

plane and mulberry trees play a crucial role in purifying the polluted air in tehran as a majorcity. in this research, 13 main districts of tehran city were chosen as study area. 20 completely healthy planeand mulberry species were selected in similar ecological conditions and age range. the uptake of cd and pbwas determined using spectrophotometry, whereas the chlorophyll content was measured ...