Abstract: A method and apparatus for maintaining integrally bladed rotors (IBR) includes using first vibration data from a IBR vibration apparatus of a first IBR to determine a set of values for a corresponding set of inherent vibratory properties based on a reduced order model for an IBR type to which the first IBR belongs. Shape data indicating an initial shape of a surface of a first blade is used, with repair data that indicates a candidate repair to form a restored shape, to determine a change in a value of an inherent blade section vibratory property of the set of inherent vibratory properties. A condition of the first IBR is determined based at least in part on the change in the value of the inherent blade section vibratory property. The first IBR is maintained based on the condition.

Abstract: A method and apparatus for maintaining integrally bladed rotors (IBR) includes using first vibration data from a IBR vibration apparatus of a first IBR to determine a set of values for a corresponding set of inherent vibratory properties based on a reduced order model for an IBR type to which the first IBR belongs. Shape data indicating an initial shape of a surface of a first blade is used, with repair data that indicates a candidate repair to form a restored shape, to determine a change in a value of an inherent blade section vibratory property of the set of inherent vibratory properties. A condition of the first IBR is determined based at least in part on the change in the value of the inherent blade section vibratory property. The first IBR is maintained based on the condition.

Abstract: A method and apparatus for maintaining integrally bladed rotors (IBR) includes using first vibration data from a IBR vibration apparatus of a first IBR to determine a set of values for a corresponding set of inherent vibratory properties based on a reduced order model for an IBR type to which the first IBR belongs. Shape data indicating an initial shape of a surface of a first blade is used, with repair data that indicates a candidate repair to form a restored shape, to determine a change in a value of an inherent blade section vibratory property of the set of inherent vibratory properties. A condition of the first IBR is determined based at least in part on the change in the value of the inherent blade section vibratory property. The first IBR is maintained based on the condition.

Abstract: A system for knowledge assessment and encouraging learning comprises transmitting to the a terminal a plurality of multiple choice questions and two-dimensional answers thereto, the answers including a plurality of full-confidence answers consisting of single-choice answers, a plurality of partial-confidence answers consisting of sets of multiple single-choice answers, and an unsure answer. The system further administers a confidence-based assessment (CBA) test that presents to the test subject the plurality of multiple choice questions directed to categorical topics, and the two-dimensional answers thereto, by which the test subject indicates both their substantive answer and the level of confidence category of their answer. The system compiles a knowledge profile from the scored CBA test, and encourages learning so that the user can address knowledge deficiencies as identified through the CBA test.

Abstract: A system for knowledge assessment and encouraging learning comprises transmitting to the a terminal a plurality of multiple choice questions and two-dimensional answers thereto, the answers including a plurality of full-confidence answers consisting of single-choice answers, a plurality of partial-confidence answers consisting of sets of multiple single-choice answers, and an unsure answer. The system further administers a confidence-based assessment (CBA) test that presents to the test subject the plurality of multiple choice questions directed to categorical topics, and the two-dimensional answers thereto, by which the test subject indicates both their substantive answer and the level of confidence category of their answer. The system compiles a knowledge profile from the scored CBA test, and encourages learning so that the user can address knowledge deficiencies as identified through the CBA test.

Abstract: A system for knowledge assessment and encouraging learning comprises transmitting to the a terminal a plurality of multiple choice questions and two-dimensional answers thereto, the answers including a plurality of full-confidence answers consisting of single-choice answers, a plurality of partial-confidence answers consisting of sets of multiple single-choice answers, and an unsure answer. The system further administers a confidence-based assessment (CBA) test that presents to the test subject the plurality of multiple choice questions directed to categorical topics, and the two-dimensional answers thereto, by which the test subject indicates both their substantive answer and the level of confidence category of their answer. The system compiles a knowledge profile from the scored CBA test, and encourages learning so that the user can address knowledge deficiencies as identified through the CBA test.