A DSP-based measurement system dedicated to the vibration analysis on rotating machines was designed and realized. Vibration signals are on-line acquired and processed to obtain a continuos monitoring of the machine status. In case of fault, the system is capable of isolating the fault with a high reliability. The paper describes in detail the approach followed to built up fault and unfault mod...

We study Markovian continuos-time random walk models for Lévy flights and we show an example in which the convergence to stable densities is not guaranteed when jumps follow a bi-modal power-law distribution that equal zero zero. The significance of this result two-fold: i) with regard probabilistic derivation fractional diffusion equation also ii) concept site fidelity framework Lévy-like moti...

In this article is proposed AMIR-ST (Aproximación Metodológica para la Ingeniería de Requisitos de Sistemas Telemáticos) like an assembly articulated and well balanced of methods for the Requirements Engineering work flow that they are a process of develop based in continuos interaction with the users, to get Business Model, the developent of scenes and use to UML; this respect that in combined...

In this paper we propose panel cointegration tests allowing for breaks and cross-section dependence based on the Continuos-Path Block bootstrap. Simulation evidence shows that the proposed panel tests have satisfactory size and power properties, hence improving considerably on asymptotic tests applied to individual series. As an empirical illustration we examined investment and saving for a pan...

In this paper we present an analytical model for charge injection in MOS switches that is valid for all regions of operation. The model is general and can be applied for different load conditions. We analyze and develop two separate charge injection models for the different operating conditions. A simple continuos model that is valid for all conditions is then stitched together using appropriat...

Purpose Ventricular fibrillation (VF) and ventricular tachycardia (VT) are the major underlying rhythm during in-hospital cardiac arrest. For a patient in VF/VT the probability of successful defibrillation and subsequent survival to hospital discharge is directly and negatively related to the time interval between onset of the arrhythmia and delivery of the first shock. The data about this inte...

The main idea behind graph-based semi–supervised learning is to use pair–wise similarities between data instances to enhance classification accuracy (see (Zhu, 2005) for a survey of existing approaches). Many graph–based techniques use certain type of regularization that often involve a graph Laplacian operator (e.g., see (Belkin et al., 2006)). Intuitively, this corresponds to a diffusion proc...

We study grand–canonical and canonical properties of the model of branched polymers proposed in [1]. We show that the model has a fourth order phase transition and calculate critical exponents. At the transition the exponent γ of the grand-canonical ensemble, analogous to the string susceptibility exponent of surface models, γ ∼ 0.3237525... is the first known example of positive γ which is not...