1. Department of Mechanical Engineering, University of Portland, Shiley School of Engineering, 5000 N Willamette Blvd, Portland, OR 97203, USA
2. Department of Civil Engineering, University of Portland, Shiley School of Engineering, 5000 N Willamette Blvd, Portland, OR 97203, USA
3. Department of Biology, University of Portland, 5000 N Willamette Blvd, Portland, OR 97203, USA