;rhe di~cove!y of antibiotics having an highly effective and specific action on th~ rickettsial diseases has greatly' deprived of importance the formerly outstanding prevention of these diseases. however, the prevention of typhus: fever, the single rickettsiosis to be purely human and the nly. one to: be epidemic, remains an important problem. the methods of. prevention.m the mveterate foci 'ca...

a theoretical solution is presented for the forced convection heat transfer of a viscoelastic fluid obeying the giesekus constitutive equation in a concentric annulus under steady state, laminar, and purely tangential flow. a relative rotational motion exists between the inner and the outer cylinders, which induces the flow. a constant temperature was set in both cylinders, in this study. the f...