A radial roller bearing comprises a smooth cylindrical outer ring inserted in a housing with a roller race arranged in the outer ring. Upon execution of a subtest in the testflow, a database of test numbers is indexed using index information comprising 1) an identifier of the subtest, and 2) the current testflow context information. According to another aspect of the present invention, a nitride semiconductor light emitting device includes a light emitting layer having a quantum well structure with quantum well layers and barrier layers laminated alternately. The phase change material includes a polymer component, such as an elastomer, and a melting point component, which adjusts the softening temperature of the phase change material to the operating temperature of the heat source. Other extended package lead features can have a reduced leadframe thickness.