Preterm births occur in 9.7% of all US singleton births. The rate for blacks is double that of whites and the rate is 25% higher for Hispanics than for whites. While a number of individual correlates with preterm birth have been identified, race and ethnic differences have not been fully explained. Influenced by a growing body of literature documenting a relationship among health, individual in...

Compared to traditional one-sun solar cells, multijunction concentrator cells operating under concentrated radiation are advantageous because of their high output and low cooling costs. Such a PV requires technique maintain its performance efficiency. The multi-junction photovoltaic cell efficiency around 33%, (160–250 sun), has been tested. Heat pipes were used in this study as fast efficient ...