Higher education institutions face conflicting challenges; they must equip students with up-to-date knowledge in fields in which knowledge is constantly being renewed, while they also need to guide students to examine reality through broad-based observation and consider different scientific disciplines. They operate within different constrictions such as: learning program boundaries, budgetary constrictions, and lack of accessibility to experts in different areas, and the range of courses offered to students is limited. To cope with these constrictions, Ort Braude Academic College of Engineering opened an experimental program. As part of this program, students were allowed to study MOOC courses under the college’s supervision, and were eligible for accreditation if they completed the courses successfully. Only 15 out of the 600 students offered the program, registered for these courses. Only seven were accepted for the program. This paper describes the background for the college’s decision, the registration process and supervision of students, detailing students’ challenges and achievements in the MOOC courses. Students who completed the MOOC courses reported that they enjoyed meaningful learning, requiring serious efforts in comparison to the courses that the MOOC courses replaced. Given this positive feedback by the students, it was decided to continue with the experiment.
This paper is part of an effort to establish design parameters for glucose-fueled room temperature membraneless alkaline fuel cells as possible electricity suppliers for portable devices. We report experimental results for three characteristics of glucose-fueled room temperature membraneless alkaline fuel cells: 1) polarization curve, 2) power density as a function of current density, and 3) internal resistance. The internal resistance of the cell was measured by two independent experimental methods: “Voltage Divider” and “Current Interrupt”. The three characteristics were measured as a function of glucose concentration while maintaining the electrolyte, KOH, constant at 0.35 M. The results were compared with those reported for other room temperature Alkaline Fuel Cells fuelled with glucose and methanol. We found that the maximum power density has a value of 0.36 mW/cm2 at a current density of 1.44 mA/cm2 when glucose concentration is 0.22M. The “Voltage Divider” and “Current Interrupt” methods for measuring the internal resistance produced practically the same results. The resistivity of the electrolyte/fuel solution was estimated from internal resistance measurements. Resistivity was found to be linearly dependent upon glucose concentration; at a constant KOH electrolyte concentration of 0.35 M, the specific resistivity of 1 M glucose is 2.56 Ω·m. The power density obtained with Alkaline Fuel Cells fuelled with glucose is an order of magnitude smaller than that obtained for cells fuelled with methanol. More efforts should be invested in order to develop a practical glucose-fuelled fuel cell.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.