In this study, two layers: i-ZnO nanorods and p-Cu2O were fabricated by electrochemical deposition. The fabricating process was the initial formation of ZnO nanorods layer on the n-IGZO thin film which was prepared by sputtering method, then a p-Cu2O layer was deposited on top of rods to form the p-Cu2O/i-ZnO nanorods/n-ZnO heterojunction. The XRD, SEM, UV–VIS, I–V characteristics methods were used to define structure, optical and electrical properties of these heterojunction layers. The fabricating conditions and thickness of the Cu2O layers significantly affected to the formation, microstructure, electrical and optical properties of the junction. The length of i-ZnO nanorods layer in the structure of the heterojunction has strongly affected to the carriers transport mechanism and performance of this heterojunction.
The use of mobile learning, or M-learning, has been increasingly appreciated by educators due to its sustainability potential in different facets such as finance (i.e., affordable cost) and flexibility (i.e., time and pace of learning). However, it may not be effective in all situations. This study explored the feasibility of using M-learning for students’ self-study of mathematics in the context of Vietnamese high schools. Using 542 student and 40 teacher responses to two surveys, the study showed that the use of M-learning might not be feasible for students’ self-study of mathematics due to difficulties related to accessing mathematics websites, the quality of mathematics website content, students’ low level of self-learning ability and learning disengagement. This study suggests that the use of M-learning may contribute to the sustainability of education; adopting it should be based on a critical examination of contextual factors, especially students’ self-learning ability and engagement. M-learning can be promising and beneficial to students due to its capability to equip students to prepare for the fast-changing and technological-driven world. Educators have increasingly appreciated the use of M-learning, because it becomes more affordable and flexible. Nonetheless, there is still a question about near-future adoptions of M-learning due to unavailability of and inaccessibility to quality contents from trusted maths websites. The propensity of student engagements in M-learning is also an important issue for future research.
<p class="0abstract">With the availability of mobile devices capable of accessing the Internet in the Industry 4.0 era, M-learning methodology has been established. Based on the Technology Acceptance Model on technology adoption, this article analyses factors affecting the decision to use M-learning in Vietnam. The study used survey questionnaires with 238 students. The analysis shows to encourage students to choose to use M-learning is that educators need to pay attention to the design of appropriate courses to save time, improve learning efficiency, increase the mobility of learners and necessary introduce the convenience of courses to learners through many different channels.</p>
The use of mobile learning, or M-learning, has been increasingly appreciated by educators due to its sustainability potential in different facets such as finance (i.e., affordable cost) and flexibility (i.e., time and pace of learning). However, it may not be effective in all situations. This study explored the feasibility of using M-learning for students’ self-study of mathematics in the context of Vietnamese high schools. Using 542 student and 40 teacher responses to two surveys, the study showed that the use of M-learning might not be feasible for students’ self-study of mathematics due to difficulties related to accessing mathematics websites, the quality of mathematics website content, students’ low level of self-learning ability and learning disengagement. This study suggests that the use of M-learning may contribute to the sustainability of education; adopting it should be based on a critical examination of contextual factors, especially students’ self-learning ability and engagement. M-learning can be promising and beneficial to students due to its capability to equip students to prepare for the fast-changing and technological-driven world. Educators have increasingly appreciated the use of M-learning, because it becomes more affordable and flexible. Nonetheless, there is still a question about near-future adoptions of M-learning due to unavailability of and inaccessibility to quality contents from trusted maths websites. The propensity of student engagements in M-learning is also an important issue for future research.
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