The chiral ligand precursor systems [l-C pM -R '-2-R 2-2-Cp2]ethane 5 a -d bearing two dif­ ferent cyclopentadienyl fragments (C p1, Cp2 = Cp, Ind, Flu) and a variable bridge substitu­ tion pattern (R 1, R2 = H, Ph, cyclopentyl, cyclohexyl) were prepared starting from the corre­ sponding epoxides. The solid state structures o f six organic intermediates are reported in order to prove the stereo...

Thanks to the cantilever launching technique, arch bridge building has once again become popular throughout world. Today, these structures are one of three main types long-span bridges, along with suspension and cable-stayed bridges. Arch have a complex behavior during powerful earthquakes because rib is an element that primarily susceptible large axial compression force brought on by dead load...

seismic base isolation are devices that used to limit the human and material damage caused by an earthquake. this devices diffuse the energy induced at the time of the earthquake before being transferred to the structure.the base isolated structures when subjected to the near-fault eathquakes which contain long-period velocity pulses that may coincide with the period of base isolated structures...

The simulation analysis numerically investigates the thermoelastic lubricated interfacial Textured Micro-Element (TME) load-bearing contact, a theoretical model is proposed, and effective friction reduction Anti-Thermoelastic Scuffing Load bearing (ATSLB) capacity between random rough Meshing Teeth Surfaces (MTS) are presented, mechanism linking lubrication, TME meshing ATSLB revealed. real con...

The ballastless plate girder bridge, classified as a structure type that requires an emergent replacement among domestic railway bridges, generally tends to upgrade ballasted track along with continuous welded rail (CWR). axial forces of the CWR due temperature change need be distributed bridge foundations. Because most existing bridges over 50 years age do not provide any design information, s...

OBJECTIVES This is a prospective study of the clinical efficacy of the V.A.C. Granufoam Bridge Dressing for the treatment of diabetic foot ulcers. MATERIALS AND METHODS Five consecutive patients with diabetic foot ulcers were treated with V.A.C. Granufoam Bridge Dressings and studied over a period of 22-48 days. The indications for treatment included diabetic patients with open ray amputation...

This paper explores the effectiveness of shape memory alloy (SMA)/rubber-based isolation systems for seismic protection of bridges against near-field earthquakes by performing a sensitivity analysis. The isolation system considered in this study consists of a laminated rubber bearing, which provides lateral flexibility while supplying high vertical load-carrying capacity and an auxiliary device...