The integration of learning models and software is a trend in mathematics courses. However, no existing model for geometry courses involves the students making tool or media project. researchers noticed potential project-based (PjBL) GeoGebra analytical This study revealed differences influence Geo-PjBL PjBL on students’ achievement. subjects consisted 137 prospective teachers. Basic Geometry I...

Abstract Brittle materials are widely used for producing important components in the industry of optics, optoelectronics, and semiconductors. Ultraprecision machining brittle with high surface quality integrity helps improve functional performance lifespan components. According to their hardness, can be roughly divided into hard-brittle soft-brittle. Although there have been some literature rev...

The aim of the article is to find a correlation between change in properties cooling agent and geometry chipformer, as both are reflected service life tool after deep drilling. reason for carrying out research requirement practice obtain economic efficiency production such demanding process When applying latest designs gun drills, it very important correctly set technological parameters maintai...