- Mexico, Mexico
rosa espinola
IPN - CIC, Ciencias de la Computación, Faculty Member
Research Interests:
Research Interests:
Research Interests: Engineering, Economics, Statistical Analysis, Neural Networks, Neural Network, and 25 moreEconomic Forecasting, Electricity Market, Feature Selection, Power Generation, Wavelet Transform, Wavelet Transforms, Goodness of Fit, Global Optimization, Profitability, Electricity prices, Cross Validation, Predictive models, Electricity Markets, Multilayer Perceptron, Robustness, ARIMA Models, Applied Energy, Backpropagation, Standard Error, Electric Power, Filtering, Artificial Neural Network, Electrical And Electronic Engineering, Time Series Model, and Arima Model
Research Interests:
A significant correlation between autoimmune diseases and premature or accelerated coronary atherosclerosis has been found. The objectives of the study were: (a) to evaluate myocardial perfusion defects in patients with autoimmune... more
A significant correlation between autoimmune diseases and premature or accelerated coronary atherosclerosis has been found. The objectives of the study were: (a) to evaluate myocardial perfusion defects in patients with autoimmune diseases by contrast echocardiography and nuclear imaging; and (b) to evaluate the prevalence of alterations in subclinical myocardial perfusion defects in autoimmune diseases. Myocardial perfusion in 37 patients was evaluated by contrast echocardiography at rest and with dobutamine and with nuclear imaging. The agreement between the two diagnostic tests at rest was 0.72 (P < 0.0001) and with dobutamine was 0.65 (P < 0.0001). The prevalence of abnormalities in myocardial perfusion in autoimmune diseases by contrast echocardiography and nuclear imaging was 27% and in patients with primary antiphospholipid syndrome was 30%. We concluded that there is a high level of agreement between contrast ecocardiography and nuclear imaging for assessment of myocardial perfusion defects in patients with autoimmune diseases, and their prevalence is similar to that reported in the literature.
Research Interests: Adolescent, Prospective studies, Humans, Autoimmune Disease, Autoimmune diseases, and 15 moreFemale, Male, Follow-up studies, Differential Diagnosis, Risk factors, Clinical Sciences, Middle Aged, Single Photon Emission Computed Tomography, Adult, Prognosis, Risk Factors, Diagnostic Test, Coronary Artery Disease, Lupus, and Prospective Study
Spatial patterns in an image that shows a visual perception of roughness or softness of the surface is known as the texture of the image. Most of the analysis and description of texture found in the literature is based on statistical or... more
Spatial patterns in an image that shows a visual perception of roughness or softness of the surface is known as the texture of the image. Most of the analysis and description of texture found in the literature is based on statistical or structural properties of this attribute [2]. The field of cellular automata (CA), which has been developed mainly to model the dynamical behavior of systems, is based on the behavior or arrangements of pixel values and their neighborhood which, according to some rules behaves in different manners [2, 8]. In this paper, within the frame of structural approach, a novel method based on the properties of linear cellular automata is proposed to characterize different sort of textures. To this purpose, it is assumed that a binary version of the image under study was generated by a cellular automata technique. By using this model a number of textural primitives are found which allows the production of a characterizing image. In order to verify the feasibility of the proposed method, texture images generated by CA techniques as well as natural images has been used.
Research Interests:
Research Interests:
Research Interests: Time series analysis, Exponential Smoothing, Electric Power Systems, Electricity Market, Seasonality, and 11 moreNonlinear Regression, Artificial Intelligent, Electricity prices, Electricity Markets, Lancet, Regression Model, Function approximation, Load Forecasting, Electrical And Electronic Engineering, Prediction Accuracy, and Feed Forward Neural Network
In order to analyze the repercussion of experimental isolated selected right atrial ischemia on the hemodynamics of both ventricles, we investigated the response of atrial myocardium with administration of dobutamine and evaluated the... more
In order to analyze the repercussion of experimental isolated selected right atrial ischemia on the hemodynamics of both ventricles, we investigated the response of atrial myocardium with administration of dobutamine and evaluated the utility of transesophageal echocardiography (TEE) with Doppler in the examination of alterations produced by atrial ischemia. Ten dogs were studied with normal, diminished, and increased cardiac output with ligation of the visible atrial branches of the right coronary artery. Right atrial wall movement and peak A wave velocity of tricuspid flow registered by TEE decreased (P < 0.05). The amplitude of the right atrial A wave decreased in hemodynamic recordings (P < 0.05). No significant modifications occurred in right ventricular wall movement nor in pressures registered in right or left ventricles or cardiac output. Seventy-five minutes after atrial ischemia was induced dobutamine was administered. In dogs with incomplete ligations of atrial circulation, right atrial wall movement improved (P < 0.001), and the amplitude of the peak A wave velocity of tricuspid flow increased. In dogs with complete coronary ligation, administration of the medication produced no improvement of these variables. The findings indicate that it is possible to produce selective right atrial ischemia manifested by diminished wall movement, a diminished atrial component of tricuspid flow in TEE, and decreased amplitude of the A wave in atrial pressure recordings. The localized hemodynamic changes produced by right atrial ischemia are not related to variations in venous return when right ventricular function is normal. Apparently isolated right atrial damage from ischemia does not affect ventricular function if these remain healthy. The recuperation of atrial contractility can be demonstrated with dobutamine. Transesophageal echocardiography is a very useful technique for studying right atrial ischemia and infarction.
Research Interests:
Nowadays, remote sensing is used in many environmental applications, helping to solve and improve the social problems derived from them. Examples of remotely sensed applications include soil quality studies, water resources searching,... more
Nowadays, remote sensing is used in many environmental applications, helping to solve and improve the social problems derived from them. Examples of remotely sensed applications include soil quality studies, water resources searching, environmental protection or meteorology simulations. The classification algorithms are one of the most important techniques used in remote sensing that help developers to interpret the information contained in the satellite images. At present, there are several classification processes, i.e., maximum likelihood, paralelepiped or minimum distance classifier. In this paper we investigate a new satellite image classification Algorithm based on Cellular Automata (ACA), a technique usually used by researchers on complex systems. There are not previous works related to satellite image classification with cellular automata. This new kind of satellite image classifier, that improves the results obtained by classical algorithms in several aspects, has been validated and experimented in the SOLERES framework.
