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We present some examples of mechanical systems such that given n constants of motion in involution (where n is the number of degrees of freedom), we can identify a coordinate system in which the Hamilton-Jacobi equation is separable (or R-separable),…

This paper presents the application of trajectory tracking using adaptive neural networks to the double chaotic pendulum. The controller structure proposed is composed by a neural identifier and a PI Control Law. Experimental results with the chaotic pendulum showed the…

A protocol to obtain the matrix product state representation of a class of boson states is introduced. The proposal is presented in the context of linear systems and is tested by performing simulations of a reference model. The method can…

We derive the atomic radiative corrections predicted by QED using an alternative approach that offers the advantage of physical clarity and transparency. The element that gives rise to these corrections is the fluctuating zero-point radiation field (ZPF) of average energy…

The Standard Model (SM), despite of being phenomenologically extremely successful, presents some fundamental questions, like the big differences in the values of the masses of the quarks (hierarchy of masses), and the possible generation of flavour changing neutral currents (inspired…

The determination of the different radiation fields in an electron accelerator requires the use of selected radiation detectors, in this work we describe the experimental considerations on the determination of the intensity of electrons and X-rays generated by bremsstrahlung in…

This paper presents a preliminary analysis of thermal anomalies before the Baja California M7.2 earthquake occurred on April 4, 2010. The results show that surface air temperature of the Mexicali station, which is the closest one to the epicenter, reaches…

Changes in global mean sea surface temperature may have potential negative implications for natural and socioeconomic systems; however, measurements to predict trends in different regions have been limited and sometimes contradictory. In this study, an assessment of sea surface temperature…

(ZnO)X-(CdO)1-X thin films were deposited on glass substrates at 300°C and 400°C by ultrasonic spray pyrolysis with compositions ranging from CdO to ZnO. The electrical properties were obtained by impedance spectroscopy and Hall Effect measurements. Scanning electron microscopy, energy dispersive…