Because of their inherent low ductility, TiAl-based materials are difficult to fabricate, especially thin gage titanium gamma aluminide (TiAl) sheet and foil. In this paper, an innovative powder metallurgy approach for producing cost-effective thin gage TiAl sheets (with 356 mm long and 235 mm wide, and a thickness of 0.74, 1.09, 1.55, and 2.34 mm, respectively) is presented. The microstructure...

The use of catheter ablation to treat AF is increasing rapidly, but there is presently an incomplete understanding of its cost-effectiveness. AF ablation procedures involve significant up-front expenditures, but multiple randomized trials have demonstrated that ablation is more effective than antiarrhythmic drugs at maintaining sinus rhythm in a second-line and possibly first-line rhythm contro...

R. helvetica (5), R. slovaca (6), and R. felis (7). The serologic findings indicated antibodies at a higher level to R. aeschlimannii than to other tested species. R. aeschlimannii is phylogenetically distant from R. conorii but is closely related to R. rhipicephali and R. montanensis, which have never been described as human pathogens. This patient appeared to have a typical case of R. conorii...