Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 5 of 5 for “"lifetime testing"”.
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Lifetime Testing of Wire-Grid Polarizers with Selected Over-Coatings
… Over-coating a WGP has been found to increase lifetime and durability. This research provides lifetime data on coated and uncoated WGPs. WGPs over-coated with 100nm of SiO2, 300nm of MgF2, and with no over-coating were heated to temperatures of 450 ºC, 500 ºC, and 550 ºC and timed until they …
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Modeling of Hall thruster lifetime and erosion mechanisms
… transfers. However, uncertainty about thruster lifetime has impeded the device's widespread integration as mission designers want a propulsion system guaranteed to last the entire mission duration. Furthermore, recent interest in applying the technology to more complex propulsion tasks has …
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Design and effects on handrim kinetics of an automatic gear-shifting wheel for manual wheelchairs
… design included sensor calibrations, benchtop testing and a full system test of the automatic transmission electronics. Speed and torque calibrations agreed qualitatively with, yet deviated quantitatively from theoretical and modeled conversions. Shift reliability testing showed that the …
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HIV & STD testing among heterosexual African American men
… reduce the risk of disease transmission. Regular testing also provides an opportunity for early diagnosis of infection and links those who are diagnosed with an infection to the appropriate medical care and services. The Centers for Disease Control and Prevention’s (CDC) recommendations for …
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Mechanics and multi-physics deformation behavior of polymer electrolyte membranes
… and mechanical degradation over the target lifetime of the fuel cell. Membrane mechanical integrity is thus a critical concern for commercial distribution of PEMFC technology. This thesis has two primary focus areas: (1) characterization and modeling of Nafion, the benchmark PEM, in order to …