Dear colleagues,

We are pleased to announce the winners of the Machines 2021 Outstanding Reviewer Award. The Machines Editorial Board and Editorial Team would like to gratefully acknowledge the time and energy dedicated by reviewers in checking manuscripts submitted to Machines. It is due to their efforts that the high quality of the journal and quick turnaround are maintained.

Prof. Dr. Piotr Gierlak
Department of Applied Mechanics and Robotics, Rzeszow University of Technology, Poland
Research Interests: robot modeling and control; artificial intelligence in robotics; VR in robotics; mechanical vibration and vibrodiagnostics

Dr. Sebastian A. Nugroho
Department of Electrical Engineering and Computer Science, University of Michigan, USA
Research Interests: control theory; optimization; state estimation; power systems; transportation systems

Dr. Viorel Paleu
Gheorghe Asachi Technical University of Iasi, Romania Mechanical Engineering Faculty Mechanical Engineering, Mechatronics and Robotics Department, Romania
Research Interests: tribology; friction; wear; machine parts; signal processing; data acquisition; automotive; mechanical transmissions; mechanical engineering; lubrication; lubricants; coatings; materials; rolling bearings; diagnosis

Each of the winners will receive the following:
– 100 Swiss francs;
– 50% discount on the APC for their next publication in Machines;
– A certificate of appreciation.