A Virtual Lab to run educational computer simulations of a vibrating membrane has been created. This educational virtual lab may be used to support some courses in the vibration engineering career. The module solves the 2D wave equation for a rectangular membrane which is shown on computer-screen vibrating according to data supplied by the user. The Virtual Lab makes the computations and renders on screen a 3D view of the vibrating membrane, which displays the normal modes of oscillation. A short theory is shown on screen while the simulation takes place, in this way the learning is fostered because the user verifies the theory with the simulation. Details on how to develop the simulation program are included, so that interested readers may create their own simulators. Some comments about the advantages of using computer simulation in education are included.

A Virtual Lab to run educational computer simulations of a vibrating membrane has been created. This educational virtual lab may be used to support some courses in the vibration engineering career. The module solves the 2D wave equation for a rectangular membrane which is shown on computer-screen vibrating according to data supplied by the user. The Virtual Lab makes the computations and renders on screen a 3D view of the vibrating membrane, which displays the normal modes of oscillation. A short theory is shown on screen while the simulation takes place, in this way the learning is fostered because the user verifies the theory with the simulation. Details on how to develop the simulation program are included, so that interested readers may create their own simulators. Some comments about the advantages of using computer simulation in education are included.

This article analyses how the concept of citizenship is addressed in 15 Peruvian cybermedia platforms and how Internet users use this term on the basis of the information published, in order to know the semantic coincidences and differences in media and public agendas. This research was carried out using a mixed method which combines the classical analysis of news’ content, computer analysis of users’ comments and interviews. Among findings validated by media journalists, the little attention paid by platforms to citizens is highlighted, as well as the divergence between the approaches of the senders and users. Some solutions to the abovementioned misunderstanding in this field of unquestionable public interest that affects both public debate and the development of citizens who are aware of their roles in society are proposed.

This article analyses how the concept of citizenship is addressed in 15 Peruvian cybermedia platforms and how Internet users use this term on the basis of the information published, in order to know the semantic coincidences and differences in media and public agendas. This research was carried out using a mixed method which combines the classical analysis of news’ content, computer analysis of users’ comments and interviews. Among findings validated by media journalists, the little attention paid by platforms to citizens is highlighted, as well as the divergence between the approaches of the senders and users. Some solutions to the abovementioned misunderstanding in this field of unquestionable public interest that affects both public debate and the development of citizens who are aware of their roles in society are proposed.