In this paper, the region in which the structural system is situated is divided into four subregions, namely upper, lower, left and right subregions. The stiffness matrix of the entire system is then formed and using the existing direct symmetry and reverse symmetry, the relationships between the entries of the matrix are established. Examples are included to illustrate the steps of the method.

among the various interpretations of michelangelo’s moses, freud’s is well-known. the founder of psychoanalysis, freud reviews all the critics and interpretations of this masterpiece and then offers his own: this moses is not about to spring up, as claimed by others, but on the contrary, is sitting down, suppressing his “rage”. in the light of recent works of daniel arasse, art critic (study of...

fullerene chemistry is nowadays a well-established field of both theoretical and experimental investigations‎. this study considers the symmetry of small fullerenes cage c24 and c28‎. ‎using pm3 program for c24 and c28 fullerenes, oh and td symmetry were confirmed, respectively‎. ‎ the mentioned algorithm to compute the automorphism group of these fullerenes with connectivity and geometry of th...

The purpose of this research is to provide a deeper understanding of the planar high- symmetry configuration instability. In the ideal case, the distortion corresponds to the movements of nuclei along normal modes that belong to non-totally symmetric irreps of the high symmertry (HS) point group of molecule. The analysis of the structural distortion from the HS nuclear arrangements of the JT ac...

we introduce a new solution for kawahara-kdv equations. the lie group analysis is used to carry out the integration of this equations. the similarity reductions and exact solutions are obtained based on the optimal system method.

introduction: anthropology is the science of body sizes evaluation in living people which is applied in both medical and non-medical professions. the main purpose of the study is the evaluation of foot growth from birth to the age of 10 in folk fars girls of birjand and to make an archive of the data and to study symmetry based on anthropometry and dermatoglyphy. methods: in this study, the foo...

the analysis of the 27al and 35cl quadrupole coupling parameters of aluminum methyl chloride dimers were carried out on the basis of the density functional theory (dft). the available experimental values of quarupole coupling constants were compared with their calculated ones. in this investigation, the correlations were made between calculated 27al and 35cl nuclear quadrupole coupling constant...