Direct Observation of Incoherent Cherenkov Diffraction Radiation in the Visible Range.

We report on the observation of incoherent Cherenkov radiation emitted by a 5.3 GeV positron beam circulating in the Cornell electron-positron storage ring as the beam passes in the close vicinity of the surface of a fused silica radiator (i.e.

Comparison of caregiver forces required for sliding a patient up in bed using an array of slide sheets.

This study investigated the forces required while performing the common patient handling task of moving a patient up in bed using traditional cotton sheets or friction-reducing slide sheets. Twenty-nine healthy adult participants 18 to 36 years of age were recruited as "patients." Hand forces and lumbar compression and shear forces were calculated on the "caregiver" when performing the repositioning task.