Introduction
Dr. Loghman Ghahramany was born in 1970 at the city of Boukan, West Azarbaijan province, Iran. He received his BSc degree in forestry in 1993, MSc in forestry in 1995, both from the University of Tehran, Iran and his Ph.D degree in forest biometry in 2005 from the Moscow State Forest University, Russia. Dr. Loghman Ghahramany is currently an associate professor of forest biometry at the University of Kurdistan, Sanandaj, Iran. He has taught forest measurements, statistics and probability, forest biometry, and advanced statistical methods courses at Department of Forestry, University of Kurdistan, Sanandaj, Iran since 1995.