The Q-matrix serves as a bridge that links items and attributes, and its accuracy affects the results of cognitive diagnosis. Inaccuracy of the Q-matrix are a common issue frequently encountered in ...

Abstract: We propose a systematic and efficient extension of the multimodal transfer-matrix method to obtain the dispersion diagram of structures with 2-D periodicity specifically targeted to ...

Structural equation modeling (SEM) is a widely used statistical method in social science. However, many published articles employing SEM appear to contradict its underlying principles and assumptions, ...

This organization contains the source files for the submodule on the Matrix Method for Statics, part of Unit 2 of CIEM5000 Course base Structural Engineering at Delft University of Technology for the ...

Creative Commons (CC): This is a Creative Commons license. Attribution (BY): Credit must be given to the creator. In the development of 2D metal–organic frameworks (MOFs) and 2D covalent organic ...

Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States Department of Micro, Nano and Bioprocess Engineering, Faculty of Chemistry, Wroclaw ...

An illustration of a magnifying glass. An illustration of a magnifying glass.

Scientists have unearthed logs in Africa that are nearly a half-million years old, the remnants of large wooden structures crafted by our early ancestors. By Carl Zimmer Nearly half a million years ...