Technology and education

We present experimentally determined values of dielectric function of GaAs following fs laser excitation. The data at photon energies of 2.2 and 4.4 eV show that the response of the dielectric function to the excitation is dominated by changes in the...

In the kinetic theory of non-equilibrium phenomena in dilute polyatomic gases there is a characteristic difference between the treatment of non- spherical and spherical particles. This difference stems from the fact that in a polyatomic gas, i.e. a gas of...

We discuss student participation in an online social annotation forum over two semesters of a flipped, introductory physics course at Harvard University. We find that students who engage in high-level discussion online, especially by providing answers to...

In this chapter, we introduce a new technology for facilitating and measuring learner engagement. The system creates a learning experience for students based on frequent feedback, which is critical to learning. We open by problematizing traditional...