The paper presents a solar radiation monitoring system, using two scientificpyranometers and an on-line computer home-made data acquisition system. The firstpyranometer measures the global solar… (More)

People are interested in the composition of honeybee pollen due to its nutritional value and therapeutic benefits. Its palynological composition depends on the local flora surrounding the beehive,… (More)

The paper presents relevant information about the working principle of the geothermal heat pumps and a study, based on an original computer simulation, analysing the influences of the working… (More)

The paper is presenting a solar radiation monitoring system, based on two scientific pyranometers and an on-line computer data acquisition system. The values of total and diffuse solar radiation are… (More)

The paper presents the monitoring system of a small reversible air conditioning and heat pump device via the Internet. Presented are the construction of the equipment, the structure of the data… (More)

The two theories we will describe in these lectures have many things in common. They both associate algebraic invariants to some geometric objects. The meaning of ”invariant” is that the algebraic… (More)

We give topological obstructions to the existence of a closed exact Lagrangian submanifold L →֒ T M , where M is the total space of a fibration over the circle. For instance, we show that π1(L)… (More)

Let G be an infinite group which is finitely presented. Let X be a finite CW−complex of dimension q whose fundamental group is Z × G. We prove that for some i ≤ q the homotopy group πi(X) is not… (More)

We give topological obstructions to the existence of a closed exact Lagrangian submanifold L →֒ T M , where M is the total space of a fibration over the circle. For instance, we show that π1(L)… (More)