Results 261 to 270 of about 4,307,718 (307)
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Piezoelectric multilayer actuator life test
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2011Potential NASA optical missions such as the Space Interferometer Mission require actuators for precision positioning to accuracies of the order of nanometers. Commercially available multilayer piezoelectric stack actuators are being considered for driving these precision mirror positioning mechanisms. These mechanisms have potential mission operational
Stewart, Sherrit +7 more
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Journal of Petroleum Technology, 2008
Management Well testing provides answers you cannot get any other way. Whether testing is performed during exploration and appraisal, development, or production, it provides the greatest levels of security to support decisionsâdecisions that can affect the reservoir for its active life.
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Management Well testing provides answers you cannot get any other way. Whether testing is performed during exploration and appraisal, development, or production, it provides the greatest levels of security to support decisionsâdecisions that can affect the reservoir for its active life.
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Optimality in Accelerated Life Tests
Mathematics of Operations Research, 1992We formulate a stochastic control problem arising from the optimal design of accelerated life tests. The model is obtained, in a natural way, in the setup of point processes. The cost functional depends on the total number of items under test at time t, the observed number of items failed up to time t, and the stress level applied to the items under ...
Del Grosso, G., Gerardi, A., Koch, G.
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The Life Engagement Test: Assessing Purpose in Life
Journal of Behavioral Medicine, 2006This article describes a 6-item scale, the Life Engagement Test, designed to measure purpose in life, defined in terms of the extent to which a person engages in activities that are personally valued. Psychometric data are presented including information about the scale's factor structure, internal consistency, test-retest reliability, convergent ...
Michael F, Scheier +7 more
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2012
Morbid obesity strongly affects patients' quality of life (QoL). Thus it is mandatory to include evaluation of QoL in the follow-up and outcome assessment after bariatric surgery. There are a number of tests to evaluate healthrelated QoL. Some are generic, like the Medical Outcome Study Short Form 36 (SF-36), others are obesity specific, like the ...
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Morbid obesity strongly affects patients' quality of life (QoL). Thus it is mandatory to include evaluation of QoL in the follow-up and outcome assessment after bariatric surgery. There are a number of tests to evaluate healthrelated QoL. Some are generic, like the Medical Outcome Study Short Form 36 (SF-36), others are obesity specific, like the ...
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Aircraft Engineering and Aerospace Technology, 1986
AT a manufacturing stage or to ensure the continued airworthiness of an aircraft's components, nonâdestructive testing (NDT) occupies an important place in any inspection programme. By means of the methods employed, parts can be inspected and returned to service with confidence in their ability to fulfil a role in a system or structure.
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AT a manufacturing stage or to ensure the continued airworthiness of an aircraft's components, nonâdestructive testing (NDT) occupies an important place in any inspection programme. By means of the methods employed, parts can be inspected and returned to service with confidence in their ability to fulfil a role in a system or structure.
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Optimal Design in Nonparametric Life Testing
Statistical Inference for Stochastic Processes, 2004zbMATH Open Web Interface contents unavailable due to conflicting licenses.
CECI, Claudia, L. MAZLIAK
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2011
Life cycle evaluation of ultracapacitors is the subject of considerable industrial interest, especially in terms of elevated temperature conditions and power cycling. The authors have investigated ultracapacitor parameter changes due to electrical and thermal stress and have explored their aging characteristics.
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Life cycle evaluation of ultracapacitors is the subject of considerable industrial interest, especially in terms of elevated temperature conditions and power cycling. The authors have investigated ultracapacitor parameter changes due to electrical and thermal stress and have explored their aging characteristics.
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Accelerated Life Tests and Information
Radiation Research, 1982BARLOW, R. E. Accelerated Life Tests and Information. Radiat. Res. 90, 90-97 (1982). This is a partly philosophical discussion of the problems of conducting accelerated life test experiments and analyzing data from such experiments. The objective is to predict life at a specified stress level or radiation dose.
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Journal of the American Statistical Association, 1953
Benjamin Epstein, Milton Sobel
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Benjamin Epstein, Milton Sobel
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