HARRISBURG, Pa., Oct. 1, 2025 /PRNewswire/ -- GetPer4mance.com, the official home of Per4mance Development LLC, has expanded its patented Differential Integration and Reinforcement System (DIRS) ...

Works with stock and most aftermarket exhaust systems, including Borla The two-piece design reinforces the differential case and adds a triangulated integration point to the rear cross-member, ...

https://doi.org/10.2307/1510610 • https://www.jstor.org/stable/1510610 Copy URL The effects of differential reinforcement of other behavior (DRO) and response cost ...

Significant dollars are spent each school year on professional development programs to improve teachers' effectiveness in the classroom. The usefulness of these programs can be measured by the ...