%0 Journal Article %T Low-Head Energy Conversion: A Conceptual Design and Laboratory Investigation of a Microtubular Hydro Propeller %A Helena M. Ramos %A Mariana Simã %A o %A Kaloyan N. Kenov %J ISRN Mechanical Engineering %D 2012 %I Hindawi Publishing Corporation %R 10.5402/2012/846206 %U http://dx.doi.org/10.5402/2012/846206