No abstract

With the rapid development of web techniques, information and communication technology is being increasingly used in curricula, and learning portfolios can be automatically retrieved and maintained as learners interact through e-learning platforms.Further, massive open online courses (MOOCs), which apply such technology to provide open access to hundreds and thousands of learners, have recently gained popularity in higher education. Learning styles refer to an individual's approach to learning based on their preferences, strengths and weaknesses. It was speculated that different learning styles could affect a learner's preference for MOOCs. Therefore, in this study, we investigated the influence of learning styles on the learners' intentions to use MOOCs. The participants comprised 184 undergraduate students, who were surveyed regarding their learning experiences, motivation and intentions to use MOOCs. The results showed that learners with a high-reflective learning style tended to have less experience in using MOOCs. Using the K-means algorithm, we also clustered the multiple learning styles and found a 90% probability that the type of learning styles does influence learner intentions. Finally, we explored the reasons why learners used MOOCs, analyzed the learning approaches that could assist learning in MOOCs and examined the correlation between learning styles and user intention.

NSI events tend to occur in dental personnel (interns) with lesser clinical skill and experience, in the period (from July to September) when new interns and residents join the clinic, on the working days in the middle (Wednesday) and end (Friday) of the week, and at the hours close to lunch break (11:00 to 14:00) and getting off duty (after 16:00). In addition, establishment of standard operating procedure for injection needle removal is necessary, because one-third of NSI are needle-related.

A new and general approach to achieving efficient electrically driven light emission from a Si-based nano p-n junction array is introduced. A wafer-scale array of p-type silicon nanotips were formed by a single-step self-masked dry etching process, which is compatible with current semiconductor technologies. On top of the silicon nanotip array, a layer of n-type ZnO film was grown by pulsed laser deposition. Both the narrow line width of 10 nm in cathodoluminescence spectra and the appearance of multiphonon Raman spectra up to the fourth order indicate the excellent quality of the ZnO film. The turn-on voltage of our ZnO/Si nanotip array is found to be approximately 2.4 V, which is 2 times smaller than its thin film counterpart. Moreover, electroluminescence (EL) from our ZnO/Si nanotips array light-emitting diode (LED) has been demonstrated. Our results could open up new possibilities to integrate silicon-based optoelectronic devices, such as highly efficient LEDs, with standard Si ultralarge-scale integrated technology.