Image based visual servoing with kinematic singularity avoidance for mobile manipulator.

This article presents an implementation of visual servoing (VS) for a redundant mobile manipulator in an eye-in-hand configuration. We used the image based visual servoing (IBVS) scheme, which means the pose control of the robot is based on the error features in the image of a camera. Conventional eye-in-hand VS requires the inversion of a Jacobian matrix, which can become rank deficient, provoking kinematic singularities.

Visual Servoing for an Autonomous Hexarotor Using a Neural Network Based PID Controller.

In recent years, unmanned aerial vehicles (UAVs) have gained significant attention. However, we face two major drawbacks when working with UAVs: high nonlinearities and unknown position in 3D space since it is not provided with on-board sensors that can measure its position with respect to a global coordinate system. In this paper, we present a real-time implementation of a servo control, integrating vision sensors, with a neural proportional integral derivative (PID), in order to develop an hexarotor image based visual servo control (IBVS) that knows the position of the robot by using a velocity vector as a reference to control the hexarotor position.

[Platelets-rich plasma: a versatile tool for regenerative medicine?].

Platelet-rich plasma is a blood product concentrate obtained by centrifugation of whole blood that is characterized by a high concentration of platelets (4 to 6 times their normal values). The high concentration of trophic factors contained in the granules of platelets, have led to suggest that the application of platelet-rich plasma can help to stimulate or accelerate the repair or regeneration of a number of tissues. Since their first application in the treatment of skin ulcers in 1980, a considerable number of novel applications in different fields of medicine have emerged (Ophthalmology, Otorhinolaryngology, Maxillofacial Surgery surgical wounds, musculoskeletal disorders, burns, Esthetic Surgery, repair of peripheral nerves, etc.