Solar radiation causes acute foveal injury resulting Snow Boots in outer retinal defects.Symptoms often follow an event of unprotected gazing at a solar eclipse or directly viewing the sun.We encountered a series of cases during winter among habitants of high altitudes who complained of visual field scotomas.All of them had a typical history of pro
The considerable increase of wind turbine rotor size and weight in the last years has made impossible to control as they were controlled 20 years ago.The cost of energy is an essential role to maintain this type of energy as a viable alternative in economic terms with traditional or other renewable energies.Through the last decades many different f
Aiming at the problems that the large thrust of erecting mechanism and the high demand on carrying capacity of cylinder,the virtual Intermediate prototype model is established by using the ADAMS software,the method of setting the size of the contact force to detect motion interference is proposed.Using the method,that joints pivot is parameterized,