One of main methods for protecting nature is to use nature as an inspiration source for Designing new products for human being's needs. Movement and maneuver in fluids is an important issue in human activity. In this work, by inspiration from knife fish, an undulating fin for producing propulsion force are Designed and implemented. This undulating fin is a segmental anal fin, and produce sinusoidal waves which are needed for producing propulsion force. Then, parameters of this sinusoidal wave are discussed.In the fish robot, with using a special mechanical system, the direction of propulsive force is adjustable for controlling of direction and depth of swimming. Then, details of wireless control system for maneuvering and controlling of robot's speed are presented. Finally, the results of fish robot's movement is discussed experimentally.

The Design of experiment (DOE) has been used optimize the film thickness to improve corrosion property of metal parts. The DOE approach is applied to chromating process to improve the thickness of Zinc formed on the surface of low carbon steel. As it is the first time that such an Experiments study has been carried out in Iran. The result of DOE can be applied in metal coating industries successfully.

Due to the expansion of educational methods for all study sciences in the present century, the need to instruction through practice and experimentation is felt more than ever in the educational process. Experiments in the field of experimental sciences bring a wide range of thought and clear understanding to thinkers and students in this field. Practical action and experimental experimentation is a clear and tangible step in solving the challenges and abstract problems of teaching and understanding chemistry, and a visual and convincing solution that offers beyond human imagination in an understandable and observable context. During this research in the form of teacher experiences, we will review, brows and offer educational Experiments that are prepared based on practical measures, and the implementation approach for chemistry education is approved. The purpose of this study is to make some academic tests suitable for students and to provide some examples of tests along with chapters of textbooks in which it is more appropriate to present the tests. Also, descriptions of laboratory activities are provided separately. In conclusion, the use of Designed Experiments will be more useful for school students and more fruitful for college students. There are also some practical recommendations at the end of the research.