Objectives: This study compares the linear dimensional accuracy between one step and two-step impression techniques using polyvinyl siloxane material. Methodology: The Randomized controlled trial was done in Department of Prosthodontics, FMH College Medicine Dentistry Lahore Pakistan Council for Science Industrial Research Lahore. All samples which fall under inclusion criteria were included. S...

The backward differentiation formula (BDF) is a useful family of implicit methods for the numerical integration stiff differential equations. It well noticed that stability and convergence $A$-stable BDF1 BDF2 schemes parabolic equations can be directly established by using standard discrete energy analysis. However, such classical analysis technique seems not applicable to BDF-$\mathbf{k}$ $3\...

The paper provides a literature review of the STEPNC compliant research around the world. The first part of this paper focuses on projects based on STEP compliance followed by research and development in this area based on machining operations. Review the literature relating to relevant STEP standards and application in the area of turning centers. This research will review the various research...