Exponential decay in one-dimensional porous-thermo-elasticity Pablo S. Casas Dept. Matem´ atica Aplicada 1, U.P.C., Diagonal, 647. 08028 Barcelona, Spain e-mail: pablo@casas.upc.es - Web page: http://www-ma1.upc.es/˜casas Ram´ on Quintanilla Dept. Matem´ atica Aplicada 2, U.P.C., Colom, 11. 08222 Terrassa, Barcelona, Spain Acknowledgments This work is supported by the project ”Stability aspects in thermomechanics” (BFM2003- 00309) of the Spanish Ministry of Science and Technology. Keywords: porous-thermo-elasticity, exponential decay. 0