Abstract This study examined the effect of induction heating on microstructure and corrosion characteristics hybrid friction stir welded AISI 410 stainless steel. Five joints have been produced with different welding parameters like speed, spindle plunge depth, power. Their microstructures were evaluated using a scanning electron microscope, chemical composition was energy-dispersive X-ray spec...

this paper presents the results of engineering geological studies of rock blocks along a road tunnel in nw iran. the tunnel is to cross the western alborz mountain range through 530 m in length with 11.2 m span and 8 m height. eocene tuffs and andesites crop out in whole of the tunnel route. numerical analyses are done using, a 3d stability analysis and visualization program, called unwedge tha...

BACKGROUND The purpose of our study was to investigate the impact of distracting noise on the performance on a simulated orthopedic bone drilling skill when that noise blocks routine auditory feedback associated with the sounds of the drill. METHODS Medical students (n=11), intermediate residents (postgraduate years 3-5, n=10) and surgeons (n=8) each drilled 20 bicortical holes in a femur bon...

Dissimilar material joining between magnesium (AZ31B) alloy and dual-phase steel (DP600) was achieved using the friction stir welding (FSW) process. The present work aimed at studying effect of tool rotational speed on microstructure mechanical properties dissimilar joints. joints were fabricated speeds 800 1600 rpm with weld 50, 100, 150 mm/min, respectively. plunge depth 0.2 mm tilt angle 2° ...

This paper focuses on the implementation, validation and exploitation of a vertical dropshaft flow operation using the commercial VOF-based Computational Fluid Dynamics (CFD) code, FLOW-3D ® . Using the experimental data of Chanson (2002), the package was used to simulate the flow patterns in a rectangular dropshaft with plunge-flow pattern. Both k−ε and k−ε RNG turbulence closures were tested ...

BACKGROUND Psychomotor testing has been recently incorporated into residency training programs not only to objectively assess a surgeon's abilities but also to address current patient-safety advocacy and medicolegal trends. The purpose of this study was to develop and test a cost-effective psychomotor training and assessment tool-The Fundamentals of Orthopaedic Surgery (FORS)-for junior-level o...

Conventional wisdom holds that dependence among geological prospects increases exploration risk. However, dependence also creates the option to truncate exploration if early results are discouraging. We show that the value of this option creates incentives for explorationists to plunge into dependence; i.e., to assemble portfolios of highly correlated exploration prospects. Risk-neutral and ris...