The principal causes of cracking in prestressed concrete sleepers are the dynamic loads induced by track irregularities and imperfections in the wheel-rail contact and the in-phase and out-of-phase track resonances. The most affected points are the mid-span and rail-seat sections of the sleepers. Central and rail-seat crack detection require visual inspections, as legislation establishes, and i...

The TRIUMF ARIEL project plans to build a 50 MeV electron linac at 10 mA to produce radioactive ion beams through photo-fission. Beam dynamics studies of the accelerator are on-going. The TRACK code originally written to simulate proton and heavy ion linacs has been used in e-linac modelling studies. This paper will summarize the TRACK simulation studies and the simulation results will be compa...

Abstract. The tools for interpreting fission-track data are evolving apace, but, even so, the outcomes cannot be better than data. Recent studies showed that track etching and observation affect confined-track length measurements. We investigated effects of grain orientation, polishing, on counts in apatite. Our findings throw light phenomena hence sample ages, whilst raising question: what as ...

The isotopic thermochronological study included the U–Pb (SHRIMP) and fission-track dating of zircon and fission-track and (U–Th)–He dating of apatite from syenite intrusions cropping out in the eastern slope of the Sredinnyi Range of Kamchatka. The emplacement time of the intrusion was determined, and its exhumation velocity was evaluated. According to U–Pb (SHRIMP) zircon dating, the age of s...

Precise registering and transferring of the selected path of insertion and withdrawal of removable, partial dentures is a critical step in designing and fabricating their framework and determining the retention, stability, and support of the completed prosthesis. Many authors have addressed this issue in their studies. In this study we present a new technique for registering and reproducing par...