1. Department of Electrical Engineering, University of Arkansas, Fayetteville, Arkansas 72701, USA
2. Department of Chemistry and Physics, University of Arkansas at Pine Bluff, Pine Bluff, Arkansas 71601, USA
3. Department of Physics, Wasit University, Kut 52001, Iraq
4. ASM, 3440 East University Drive, Phoenix, Arizona 85034, USA
5. Department of Engineering, University of Massachusetts Boston, Boston, Massachusetts 02125, USA
6. Arktonics, LLC, 1339 South Pinnacle Drive, Fayetteville, Arkansas 72701, USA