Heikki J. Nieminen, PhD is an Adjunct Professor in the Department of Physics at the University of Helsinki. He received a Doctor of Philosophy degree from the University of Helsinki. His research interests are Medical Physics, Articular Cartilage, Osteoarthritis, Cartilage Repair, Laser Ultrasonics, Ultrasonic Therapy, Drug Delivery, Nano Drug Delivery, Acoustic Levitation, Electrospinning.