Conferences and visits to labs lead Dr. Staforelli by Europe

Dr. Juan Pablo Staforelli will travel by European labs, in two collaboration activities in France, Turkey and Portugal, from July 4 to 29.

The journey will start with a two week visits in the Institut Femto-ST, Besançon, France, part of “Modeling and stabilization of distributed port Hamiltonian systems: Application to macro and micro systems with irreversible thermodynamic phenomena”, a collaboration project directed by Dr. Daniel Sbárbaro Hofer, from Electrical Engineering Department of the Universidad de Concepción. The project is funded by the ECOS/CONICYT program, an instrument aimed to stimulate the relationships among national researchers and their French colleges, which also includes reciprocal visits, and the exchange of students in internships of one month.

“Control process is applied in every system involving automation and efficiency. We are interested on the understanding of energy distribution in very small thermodynamic systems, likeif they were very small engines. Control process could be applied also in mechanical systems such in lasers. The mirrors of a laser require very accurate adjustment, to response to several kind of distortion. This disturbance transfers noise to the experiment, thus, affecting the measurements”, Dr. Staforelli explains, and continues: “If the control is not integrated in the original design of an apparatus, we can implement it and improve the quality and sensitivity of the instruments. Our idea is to know the fundaments of control theory, in order to make it simpler and implementable, for instance, in optical tweezers experiments and in other systems”.

The next stop will be Lyon, to participate at the IFAC Workshop on Thermidynamic Foundations of Mathematics Systems Theory, prepared by the Laboratory of Automatic Control and Chemical Engineering (LAGEP), in the Université de Lyon. Staforelli explains that practical problem is the high cost of equipment for the research: “We could save a lot if we learn how to build this equipment, or at least, make them more stable; that means a more efficient budget”.

The last week of July, Dr. Juan Pablo will present in RIAO/OPTILAS 2013 an approach of his research, named “Spatial measurement of spurious forces with optical tweezers”. The meeting will receive the most important researchers all over the world, andwill be held at the Faculty of Sciences of the University of Porto, July 22 to 26. His talk is a resume of the collaboration with Ignacio Bordeau, student of the master program at the Universidad de Chile, and Dr. Giovanni Volpe, from Physics Department of Bilkent University, Ankara, Turkey. Due to the above, Dr. Staforelli will pass a couple of days in the labs of his colleagues in the city of Ankara.

“This is our first work together. It concerns a fundamental phenomenon; we are trying to understand the physics behind diffusion process, between very few particles”. Here, the objective is to analyze the transport conditions in system where deterministic forces are absent; however there is interaction due to hydrodynamic effects, as concentration gradients. “These processes are fundamental because they are everywhere, like in the inner cells. Furthermore, it is not mediated by electric charges or other forces; diffusion is only conditioned by the geometry of wall channels.To describe the relation between these forms and the diffusion in these systems it what we are interested in”. Staforelli hopes that the meeting with his colleagues in Turkey and his presentation in Portugal helps to advance to the final paper, at the end of this year.



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