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In this paper we propose an implicit linear control law for a two degree freedom manipulator whose aim is to stabilize and match a linear model. We show that for any finite initial condition there exists a sufficient small control…

There are different approaches to the temporal study of time evolving systems. This paper reviews previous works related to time series and it evaluates three approaches focused to the comparison of these type of series. Two approaches are based on…

The formulation of the process of analog system design has been done on the basis of the control theory application. This approach produces many different design strategies inside the same optimization procedure and allows determining the problem of the optimal…

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We report the parasitism of an unidentified species of Philornis, extracted from a juvenile Dendroica castanea that was collected from Pipeline Road of the Soberania National Park of Panama. This finding is unusual since Philornis spp. parasitizes nested chicks. On…

The article aims at presenting the modus operandi of Keynes' economic policy -especially fiscal policy, which he reveals as the most important. For that purpose, the article is divided into four sections. First, it starts with a brief introduction. Secondly,…

Independently of capital movements, the so called Thirlwalls's Law (Thirlwall, 1979) is theoretically a robust result in the long run. When the rate of growth of exports is equal or greater than the rate of growth of foreign debt, there…

A new analytical method to calcúlate the characteristic impedance of transmission lines embedded in identical, symmetrical and reciprocal connectors is herein presented. To calcalate the characteristic impedance of transmission lines, the proposed method uses S-parameter measurements performed on two uniform…

In this paper we present a method of reducing speckle noise ¡n applications for ultrasound image processing using low degree unbiased FIR filters. An important feature of the p-lag gain of unbiased FIR filters is that at some cross points…