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Search Results: 1 - 10 of 23988 matches for " RODRíGUEZ "
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Methodology and Equations of Mineral Production Forecast
—Part I. Crude Oil in the UK and Gold in Nevada, USA. Prediction of Late Stages of Production

Sergio Pérez Rodríguez
Open Journal of Geology (OJG) , 2013, DOI: 10.4236/ojg.2013.35040

The equations of mineral production forecast link the change in time of mineral reserves with the production and the ratio of reserves to production. These equations allow us to model the development of the mineral resources evaluated at any scale. Probabilistic bidimensional charts made from montecarlo simulations provide intervals of confidence for the forecasts. The set of equations is devised and presented for a variety of applications to the oil and gas industry, as well to the production of any other mineral resource, either metals or non metals, whose ore deposit volumes and production might be quantified. The cases studied in the UK and USA are at late stages of production, periods for what the equations are most suitable to be applied without further adjustments. Experimental design allows the diagnosis of the likely values of the variables pertaining to the equations, in order to achieve the results provided by conventional production forecasts or to explore other scenarios of investigation. The method can be practical to evaluate commitments of production of mineral resources with time, to support strategic plans for companies, corporations, countries or regions based on those evaluations, for the screening and ranking of mineral assets based on their production potential and many other tasks where the prediction of future volumes of mineral production is required.

Methodology and Equations of Mineral Production Forecast. Part II. The Fundamental Equation. Crude Oil Production in USA  [PDF]
Sergio Pérez Rodríguez
Open Journal of Geology (OJG) , 2013, DOI: 10.4236/ojg.2013.36044

The fundamental equation of mineral production allows to model and design the dynamics of mineral production, however complex they are or could be. It considers not only the case of a constant production to reserves ratio for given intervals of time, but with a piecewise approach, it is also enabled to account the variation on time of this ratio. With a constant production to reserves ratio, the limit expression of the fundamental equation takes the form of an Erlang distribution with a fixed shape parameter. The rate parameter equals the scale factor. The discrete piecewise version, instead of considering the reserves and the production to reserves ratio being constant through certain intervals of time, updates both variables by units of time. This version, using either lineal or non lineal functions for the variables involved, let to model known production profiles or to forecast them by experimental design. The Hubbert’s linearization updated with recent data and the p-box method applied to determine ultimate recovery of U.S. crude oil reserves indicate official accounts underestimate them. The analysis of the ideal model of production based on Hubbert’s linearization and curve, can be made by decomposing it in the distribution with time of the reserves and of the production to reserves ratio. The distribution of reserves with time is synchronized for both the ideal Hubbert’s curve and real profiles, disregarding whether they match or not. The departure of real profiles from the ideal Hubbert’s curve lies on the differences or correspondences of the distribution with time of the production to reserves ratio. The MonteCarlo simulation applied to forecast US crude oil production for the next five years points to a slow decline, with average annual yields presenting a difference lower than 10% between the start and the end of the simulation.

The Hypothesis of Hyperia from the Perspective of Neuronal Plasticity  [PDF]
Javier álvarez-Rodríguez
Open Journal of Medical Psychology (OJMP) , 2016, DOI: 10.4236/ojmp.2016.51003
Abstract: We analyze certain mental automatisms appearing in the consciousness with phenomenological features of simple partial seizures (SPSs). We propose to include all these phenomena into a cognitive function to which we term hyperia. In this paper, we analyze the similarities between the nature of this cognitive function and the mechanisms used by our brain to elicit neuronal plasticity.
Anthropometric specimens and picturesque curiosities: the photographic orchestration of the “black” body (Brazil, circa 1865)
Rodríguez BE
Revista Ciencias de la Salud , 2012,
Abstract: In Against Race Paul Gilroy writes that the “race producing” activity unleashed in the eighteenth and nineteenth-centuries “required a synthesis of logos with icon, of formal scientific rationality with something else, something visual and aesthetic” (1). During this period, scientific discourses that elaborate the concept of race adopt new technologies, especially photography. In this article, I am particularly interested in analyzing how the “black” body is arranged photographically. I probe some examples taken from the archives collected by the Swiss scientist Louis Agassiz and the photographer Christiano Júnior in mid-19th century Rio de Janeiro. Objective: to question how these visual artifacts contributed to the re-assemblage of racial discourses precisely at the moment when the black body was invested with legal subjectivity
Efecto de la cobertura del suelo con cascarilla de arroz en el crecimiento y rendimiento del tomate de ramillete
Rodríguez Rodríguez,Gisela;
Ciencia e investigación agraria , 2007, DOI: 10.4067/S0718-16202007000300006
Abstract: from the spring to fall of 2005, in northern kanto, located in central japan, an open field was prepared for cultivating cherry tomatoes (lycopersicon esculentum var. cerasiforme) with three types of mulch: 1. rice straw with rice bran, 2. rice straw alone, and 3. polyethylene film covering. the fruits were harvested from june to the end of september. there were significant differences between the treatments in both the total yield of fruit (p = 0.0379) as well as in the yield of normal fruit (p = 0.0458). the highest total fruit production (3.4 kgplant') was obtained with the rice straw and bran treatment, followed by the other two treatments, with about 2.5 kg-plant'. other factors, such as total fruit number and the weight of damaged fruit, were not significantly different. forty days after planting in the field, plant height and other vegetative characteristics were measured; no statistically significant differences between the studied soil treatments were observed. these results indicate that the application of rice bran on a field surface previously covered with rice straw contributed to an increase in the yields of the tomato plants. the application of rice bran also facilitated weed control management
La atención integral centrada en las personas. Principios y criterios que fundamentan un modelo de intervención de discapacidad
Pilar Rodríguez Rodríguez
Palabras Mayores , 2011,
Abstract: Reflexiones sobre el modelo clásico de atención a personas mayores y personas con discapacidad, frente a lo cual se propone y grafica un modelo de atención integral centrado en la persona, en el marco de los cambios sociales, el avance en políticas sociales y en los derechos. http://www.imsersomayores.csic.es/documentos/documentos/pilar-atencion-01.pdf
Ciudad educadora. Una perspectiva politica desde la complejidad
Jahir Rodríguez Rodríguez
Urbano , 2007,
Abstract: El Proyecto Ciudad Educadora, tiene como finalidad primordial- la construcción de una ciudadanía organizada, autónoma y solidaria, capaz de convivir en la diferencia y de solucionar pacíficamente sus conflictos. Ciudad educadora es un proyecto que reivindica lo colectivo y lo público, lo político y lo ético y busca ingresar a la modernidad haciendo uso de la educación como fenómeno eminentemente comunicativo cuyo desarrollo potenciará la capacidad de incidencia de la sociedad sobre sus propios destinos, estableciendo cambios en la conducta y los comportamientos de los ciudadanos, buscando la construcción de la democracia y la ciudadanía como proyecto colectivo.
Psychocardiology, discipline is essential in these times La Psicocardiología, disciplina indispensable de estos tiempos
Teresa Rodríguez Rodríguez
MediSur , 2010,
Abstract: The paper addresses the need to consider Psychocardiology indispensable in modern times, taking into account the continuous increase of cardiovascular disease, implying the existence of genetic markers, as well as psychological and social factors. Emphasis is on considering the psychological intervention on prevention and rehabilitation for these conditions, the psychological aspects associated with invasive procedures in patients with coronary artery disease, the changes arising from acute illness and the critical condition of the patient also changes cognitive order result of changes in the microcirculation and cardiac ischemia. It emphasizes the importance of giving the study and psychological interventions in heart disease and a gender focus to include the study of the family as the cradle of learning styles of life, social support agent, as well as subjects that involved directly in the complex network of heart disease by genetic markers. It appeals to the need to sensitize medical professionals and doctors in the multifactorial approach of these diseases, as the only way to reduce morbidity and mortality from this cause and raise the quality of life of coronary patients. En el trabajo se aborda la necesidad de considerar la Psicocardiología como indispensable en los tiempos actuales, teniendo en cuenta el continuo incremento de las enfermedades cardiovasculares, al implicar la existencia de marcadores genéticos, además de factores psicológicos y sociales. Se enfatiza en considerar la intervención psicológica en la prevención y rehabilitación de tales padecimientos, en los aspectos psicológicos asociados a procedimientos invasivos en pacientes con afecciones coronarias, a las alteraciones que se derivan del padecimiento agudo y el estado crítico del enfermo, además, las alteraciones de orden cognitivo consecuencia de modificaciones en la microcirculación e isquemia cardiaca. Se insiste en la importancia de otorgarle al estudio e intervencionismo psicológico de las enfermedades coronarias un enfoque de género y en incluir el estudio de la familia por ser la cuna de aprendizaje de estilos de vida, agente de apoyo social, y también como sujetos que se involucran de manera directa en el complejo entramado de las enfermedades cardiacas por marcadores genéticos. Se apela a la necesidad de sensibilizar a profesionales médicos y no médicos en el enfoque multifactorial de estas enfermedades, como única vía de disminuir la morbimortalidad por esta causa y elevar la calidad de vida de los enfermos coronarios.
Ciudad Educadora: una perspectiva política desde la complejidad.
Jahir Rodríguez Rodríguez.
Revista de Estudios Sociales , 2001,
Abstract: City is not only an urbanistic phenomenon; it is formed by the sinergies betwen their institutions and the cultural spaces that give us the posibility to learn in the city; betwen the production of messages and the meanings that let us, at the some time to learn of the city and also, betwen its past and its present, unknow many times, that invite us to learn of the city educated city has as finality mainly the construction of an organized autonomous and solidary city capable to live together in the difference and to solve pacifically the problems.In this continuos and dynamic process of learning construction and criticism, in wich human beings invent and enjoy the culture , that produce and reproduce them the collective memory will have to recover historically functions, its knowledges and its types of organizations if the wish is to privilege the solidarity. Reflexioned and mude since the complex thougth.The educated city is a project that replevy the collective and the ethics and look for to return to the education as communicative entity and the development will be possible the capacity of incidence of the society on own destinys, establishing changes in the behaviours of the citizens, looking for the construction of the democracy and the citizenshir as a collective project.
La miticultura gallega desde la perspectiva de la economía social
Gonzalo Rodríguez Rodríguez
Revista Galega de Economía , 2003,
Abstract: El presente artículo tiene por objeto analizar el empleo que la miticultura gallega realiza de la fuerza de trabajo, considerando tanto aspectos productivos como socioeconómi-cos.Tal propósito requiere la comprensión tanto de aspectos materiales, tales como el volumen de ocupación en las diversas categorías del empleo, como inmateriales, constituidos por una cultura productiva específica mediante la que esta actividad afronta los retos de la superviven-cia y de la competencia. En particular, el cultivo de mejillón ha optado por un modelo intensivo en mano de obra, característica, en general, propia de las empresas de economía social, en las que la relación entre eficiencia y redistribución rara vez se resuelve con un equilibrio perfecto, tendiendo a predominar la función redistributiva. Tal elección ha permitido la supervivencia de esta activi-dad. En la actualidad, y dentro de la continua búsqueda de ese equilibrio, esta actividad tiene un importante reto de mejora de la eficiencia; cuestión que, como veremos, puede resolverse no sólo respetando la noción de economía social, sino profundizando aún más en ella.
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