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Blue German Shepherds German Shepherds are known for their intelligence and training ability. To remain healthy and happy, they need to be involved in their daily exercise routine and receive mental stimulation. Blue shepherds are a unique breed of German Shepherds that have a double dose of the dilution gene making their black fur appear blue. This genetic variation is a natural occurrence. Health Blue German Shepherds may be healthy dogs, but are susceptible to health issues such

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This paper discusses an in-depth experimental study on the fretting wear behavior of PVDF (polyvinylidene fluoride) piezoelectric thin film against a Si3N4 ceramic sphere under air conditions. A fretting wear device with a ball-on-plate contact configuration was applied. The changes of displacement amplitude, normal force, and applied voltage were taken into account. The friction logs were used to determine the contact state of the PVDF thin film during the fretting test. The 3D topography instrument and scanning electron microscope (SEM)