Science and Mathematics Education Commons^™

Sym Bowl Update: Encouraging And Recognizing Student Proficiency In System Dynamics Modeling, Wayne W. Wakeland

Systems Science Faculty Publications and Presentations

The judging criteria and modeling process guidelines for the SyM Bowl modeling competition are briefly reviewed. Prize-winning student models from previous SyM Bowls are then discussed in order to show how the students and their teachers appear to have interpreted the criteria and process guidelines. The strengths and limitations of the selected student models, especially the basic model structure & logic, and the process they used to build the model, as evidenced in the reports they submitted, are then presented.

The paper then considers how the criteria and process guidelines may or may not have influenced the students, followed by …

Comment On "Dynamically Maintained Steady-State Pressure Gradients", Todd L. Duncan

Center for Science Education Publications and Presentations

Sheehan [Phys. Rev. E 57, 6660 (1998)] recently discussed the possibility of establishing a dynamically maintained, steady-state pressure gradient in a gas filling a cavity. In this Comment it is pointed out that the pressure gradients in such a system, if attainable in the laboratory, could be used to violate the second law of thermodynamics.