The Effectiveness of Web-Based Assessment on Student’s Understanding of Concepts on Equilibrium and Rotation Dynamics

This study aims to determine the effectiveness of using a web-based assessment on students’ conceptual understanding of equilibrium and rotation dynamics. The method of collecting data using a quasi-experimental design with an experimental procedure is One-Group-Pretest-Posttest Design. The data analysis technique used descriptive statistical calculations in pretest, posttest, and N-gain scores. Besides, using different test paired sample t-test, effect size, and g-factor. The results other the pair results ed-sample t test showed-test the use of web-based assessment had a very large effect on students’ mastery of concepts as indicated by the difference in the pretest and posttest scores. With the g-factor, there is the effectiveness of learning using a web-based assessment, and there is an increase in scores due to treatment, and students’ initial ability does not influence it. With a correlation test for pretest and N-gain scores and a correlation test for pretest and posttest scores, web-based assessment effectively facilitates all students.

An Online Trajectory Generator on SE(3) for Human–Robot Collaboration

SummaryWith the increasing demand for humans and robots to collaborate in a joint workspace, it is essential that robots react and adapt instantaneously to unforeseen events to ensure safety. Constraining robot dynamics directly on SE(3), that is, the group of 3D translation and rotation, is essential to comply with the emerging Human–Robot Collaboration (HRC) safety standard ISO/TS 15066. We argue that limiting coordinate-independent magnitudes of physical dynamic quantities at the same time allows more intuitive constraint definitions. We present the first real-time capable online trajectory generator that constrains translational and rotational magnitude values of 3D translation and 3D rotation dynamics in a singularity-free formulation. Simulations as well as experiments on a hardware platform show the utility in HRC contexts.