is a mechanical device which can be used to obtain the continual integration of the input variable value. This paper explains the operational principles and discloses the simulation and motion study results of the mechanical integrator 3D model assembly. Specifically, 3D models of the input function generator, the ball and disc integrator and the output x-y plotter are created and their operations are simulated. This work is significant mainly for education in the fields of solid modelling, mechanism synthesis and scientific visualization of the mechanism motion and operation. In particular, the motion analysis presented in this paper visualizes and discloses the mutual relationship between the integration calculus as the mathematical operation and the geometrical and kinematical characteristics of one special type of mechanical computing device.

This paper gives an insight into the design of concentrating solar power (CSP) systems. The basic design of several types of CSP system is presented alongside their advantages and disadvantages. These advantages and disadvantages are based on their application and construction details and the paper shows how to select the most convenient CSP system. After presenting these types of CSP systems, an example of a new type of design is explained that presents a combination of several other solar concentrators.