Micro-concentrators for a microsystems-enabled photovoltaic system.

A 100X magnification, ± 2.5° field of view micro-concentrating optical system has been developed for a microsystems-enabled photovoltaic (MEPV) prototype module using 250 µm diameter multi-junction "stacked" PV cells.

Aortic valve replacement and coronary artery bypass grafting in a rare case of congenital hypofibrinogenemia.

Congenital hypofibrinogenemia is a rare condition. We believe that cardiac surgery using cardiopulmonary bypass in a patient with congenital hypofibrinogenemia has not been reported before. We discuss the management in a patient with this condition who successfully underwent an aortic valve replacement and coronary artery bypass grafting.