Portable Lightboard Use in Online Higher Education

The emergency distance education period has led to new instructional experiences and unique practices in higher education. This study focuses on one such practice that included portable lightboards designed as a cost-effective solution to support instructors’ online teaching processes from their homes. Using a case study design, data were collected via using through interviews with eight students and nine instructors who used the lightboard for the first time in order to to explore their perceptions and lived experiences. The findings obtained in this study showed that the instructors could benefit from the writing/drawing feature supported by the dynamic drawing principle of multimedia learning from their homes. Student engagement was enhanced due to offering a sustainable learning environment resembling face-to-face courses with unique limitations. The results offer key aspects of portable lightboards with great potential for future online or blended learning environments

SiC Substrate effects on electron transport in the epitaxial graphene layer

Hall effect measurements on epitaxial graphene (EG) on SiC substrate have been carried out as a function of temperature. The mobility and concentration of electrons within the two-dimensional electron gas (2DEG) at the EG layers and within the underlying SiC substrate are readily separated and characterized by the simple parallel conduction extraction method (SPCEM). Two electron carriers are identified in the EG/SiC sample: one high-mobility carrier (3493 cm(2)/Vs at 300 K) and one low-mobility carrier (1115 cm(2)/Vs at 300 K). The high mobility carrier can be assigned to the graphene layers. The second carrier has been assigned to the SiC substrate