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The glass negatives are stored in acid-free sleeves in baked-enamel cabinets ( wood or painted-metal cabinets are not recommended ) , and require cardboard spacers every 10 sleeves to support the plates and keep them vertical ( currently , spacers are absent and some parts of the collection remain in wooden drawers ) . A procedure currently approved for use in osteoarthritis in which viscous fluid is injected into a joint ( currently the knee joint ) , which results in decreased pain and increased mobility . First , it is multivariate in the sense that the model parameters ( currently temperature , salinity and horizontal currents ) used to set the " analyzed " initial conditions of the control vector are all adjusted simultaneously when assimilating data . The Graduate School requires that all non-native speakers of English who have not earned their undergraduate degree at a United States college or university be tested early in the fall term for an acceptable level of oral proficiency ( currently a 50 on the Speaking Proficiency English Assessment Kit [ SPEAK test ] ) .