Notes on Scolytus fagi Walsh, 1867 with the designation of a neotype, distribution notes and a key to Scolytus Geoffroy of America east of the Mississippi River (Coleoptera, Curculionidae, Scolytinae, Scolytini)

The identification of Scolytus fagi Walsh has been difficult because of the lack of diagnostic literature, the occurrence wickelfalzrohre of several morphologically similar sympatric Scolytus species and the loss of the syntypes.In an effort to reduce taxonomic mz7lh3t8hmlt confusion, we designate a neotype for S.fagi, redescribe the male and femal

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Center of Rigidity and Center of Shear in Wall-Frame Systems

In case of torsion in buildings, additional earthquake forces affect the structure and internal forces and displacements increases.For this reason, it is important to place the bearing systems in the plan as much as possible to reduce the torsion effect.To minimize torsion effects, the center of mass and center of rigidity should be as close as pos

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