1. THERMAL RADIATION EFFECT ON FULLY DEVELOPED FREE CONVECTION IN A VERTICAL RECTANGULAR DUCT. Authors: T. GROŞAN, T. MAHMOOD, I. POP.2. TRANSIENT LAMINAR FREE CONVECTION FROM A VERTICAL CONE WITH NON-UNIFORM SURFACE HEAT FLUX. Authors: BAPUJI PULLEPUL, J. EKAMBAVANAN, I. POP.3. RADIATION AND VARIABLE VISCOSITY EFFECTS IN FORCED CONVECTION FROM A HORIZONTAL PLATE EMBEDDED IN A POROUS MEDIUM. Authors: I. POP, S.R. POP, T. GROŞAN.4. STRUCTURAL AND ELECTRIC PROPERTIES OF Bi:2212 THIN FILMS OBTAINED BY THE OPTIMIZATION OF D. C. SPUTTERING PARAMETERS AND SUBSTRATE TEMPERATURE. Authors: A.V. POP, I. POP, S. MANOLACHE.