My recent research has focused on student understanding on the learning of physics. This is a field classified as Physics Education Research. A Google search will yield many PER groups, notably those at Oregon State University and Montana State University.
Physics Tactile Learning Objects
I am currently developing 3D Printable Tactile Physics Learning Objects including physical objects such as pulleys and levers as well as calculated surfaces such as diffraction patterns and normal distributions. See my 3D printable objects page for a full list.
HTML 5 Physics Applets
Neutron Activation Virtual Laboratory
I recently made available on this Website a converted version of a DVD video and series of laboratory experiments I created to aid in learning of the process of neutron activation of materials. Please see my Neutron Activation Virtual Laboratory page.
Anatomy of a Light Bulb Kit
I created the "Anatomy of a Light Bulb" kit produced by Nasco for students to more easily learn how an incandescent light bulb works.
Teaching at Hebei Normal University in Shijiazhuang, China
For the Spring 2012 semester, I had a one-semester sabbatical as a visiting professor teaching physics at Hebei Normal University in Shijiazhuang, China. During my sabbatical, I taught a course "A Review of Introductory Physics in English" to about 35 graduate students. In addition, I edited about 30 physics papers, abstracts, and letters that were being submitted to journals. This was very interesting experience and I have created a short (7 min) slideshow chronicling my time at in China. See my Projects Page for more slideshows and fun things. During the summer of 2013, I returned for another two month visiting professor position teaching and editing research papers.
My research has also centered around students' use of auditory graphs. I worked with the Science Access Project research group at Oregon State University's Physics Department, and my advisor was Dr. John Gardner. I most recently headed studies to develop information and manuals for the TRIANGLE and Audio Graphing Calculator programs. I have also worked on non-visual methods to represent information contained in graphs and pictures that are used in physics. Specifically, I have developed web based tests to compare visual and auditory (sound) graphs.
Several examples of auditory graphs can be found on the Sonitypes page. For this project I created a data conversion program, called DataReader, which converted X Y data pairs into an SLG sound file format that could then be converted into a MIDI sound file.
The main focus of my Ph.D. research was centered on the Auditory vs. Visual Graph Test that I developed. This test compared subjects' abilities to answer math and physics questions when receiving either visual or auditory graphs. Another study that I developed and conducted used an Auditory Preference Test to compare subjects' preferences for different types of auditory graphs.
The graphs were developed using AudioPlot controls as can be heard from this demonstration page.
In addition, findings from my graph studies helped with the development and audio graphing feature set for the Audio Graphing Calculator produced by ViewPlus Technologies
Additional resources related to Auditory Graphs:Representing Data With Sound
S. C. Sahyun, J. M. Polak, and C. J. Moore. Undergraduate student laboratory experience at the Synchrotron Radiation Center American Journal of Physics, November 2006, Volume 74, Issue 11, pp. 987-991
S. C. Sahyun and P. J. Siemens. CageLab: A low-cost apparatus to demonstrate rotational motion for advanced undergraduates American Journal of Physics, June 2005, Volume 73, Issue 6, pp. 566-570
S. Sahyun A Comparison of Auditory and Visual Graphs for Use in Physics and Mathematics Ph.D. Thesis, Oregon State University, Corvallis, OR. 1999.
S. Sahyun. Mode Transitions of an External Cavity Diode Laser. (1992) M.S. Thesis, Montana State University, Bozeman, MT.
R.Penland, R. Cormakc, J. Carsten, S. Sahyun, and K. M. Johnson. (1990)
Holographic Sundial, Optics Letters 15 (17) pp.
For a list of Talks and Posters presented, please see my Conferences page.