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Search Results: 1 - 10 of 231840 matches for " Pérez 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
 [PDF]

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

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
Abstract:

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.

Trade Liberalization and Gender Wage Gap in Mexico  [PDF]
Reyna Elizabeth Rodríguez Pérez, David Castro Lugo
Modern Economy (ME) , 2017, DOI: 10.4236/me.2017.810081
Abstract: The objective of the paper is to analyze the effect of trade liberalization on the wage gap by gender and its components in Mexico. For this, the behavior of the wage gap is analyzed for different regions of the country, classified according to the degree of exposure to trade liberalization. Using the quantitative methodology of Melly (2005) the breakdown of the salary gap by quantile used the micro data of the National Survey of Occupation and Employment (ENOE) for the years 2005 and 2016. The results reveal the existence of wage gap by gender in the different regions, that its magnitude differs regionally throughout distribution and that the wage gap has declined over time in all regions of Mexico, but the wage disadvantage still persists against women and this is higher in the lower deciles. Most of the differences are not explained by productive characteristics, although the proportion of inequality associated with discrimination factors declined in 2016 in relation to the previous reference year.
Valoración integral de los adultos mayores
Rodríguez Pérez,Josefa;
Revista Cubana de Enfermer?-a , 2001,
Abstract: a comprehensive prospective assessment of the149 older adults living in "pedro luis almaguer" home for the aged in banes municipality was carried out from january to february 1999. the essence of this research work was explained to the elderly who gave their consent to participate in it. data were obtained from the medical histories of the older adults. of the cases studied, 34.2% were females and 65.8% were males. when analyzing their affections, we found that 15.3% suffered from blood hypertension. as to their mental status, we observed that 26.8% had senile dementia; the analysis of their physical condition showed as the most significant figure that 6.7% of them was blind. 94.60% of the studied elderly had an acceptable relationship, 18.1% needs the assistance of a therapist and the nursing staff to do exercises. the assessment of the nutritional state of the elderly of our institution showed that 84.5% were normoweighted.
Análisis práctico del Plan General de Contabilidad, 2007. Las inversiones financieras
Rodríguez Pérez, Alicia
Pecunia : Revista de la Facultad de Ciencias Económicas y Empresariales , 2009,
Abstract:
Valoración integral de los adultos mayores
Josefa Rodríguez Pérez
Revista Cubana de Enfermer?-a , 2001,
Abstract: Se realizó una valoración integral prospectiva de los 149 adultos mayores residentes en el Hogar de Ancianos "Pedro Luis Almaguer" del municipio Banes, en los meses correspondientes a enero y febrero de 1999. Se realizó un conversatorio explicándoles en qué consistía la investigación, y se obtuvo el consentimiento de dichos gerontes objeto de estudio. Los datos se sacaron de las historias clínicas de los adultos mayores residentes en la institución. De los casos estudiados el 34,2 % corresponde al sexo femenino y el 65,8 % al masculino; al valorar las afecciones encontramos como cifra representativa que el 15,3 % padece de hipertensión arterial. Al estudiar el estado mental podemos observar que el 26,8 % padece de demencia senil; al analizar el estado físico, aparece como cifra representativa que el 6,7 % de los adultos mayores en nuestra investigación son ciegos, de los gerontes estudiados el 94,60 % posee una relación aceptable, el 18,1 % de los adultos mayores de nuestra institución necesitan de la ayuda de la fisioterapeuta y el personal de Enfermería para la realización de los ejercicios físicos. Al realizar la valoración del estado nutricional en nuestros gerontes institucionalizados tuvimos como cifra relevante que el 84,5 % son normopesos. A comprehensive prospective assessment of the149 older adults living in "Pedro Luis Almaguer" Home for the Aged in Banes municipality was carried out from January to February 1999. The essence of this research work was explained to the elderly who gave their consent to participate in it. Data were obtained from the medical histories of the older adults. Of the cases studied, 34.2% were females and 65.8% were males. When analyzing their affections, we found that 15.3% suffered from blood hypertension. As to their mental status, we observed that 26.8% had senile dementia; the analysis of their physical condition showed as the most significant figure that 6.7% of them was blind. 94.60% of the studied elderly had an acceptable relationship, 18.1% needs the assistance of a therapist and the nursing staff to do exercises. The assessment of the nutritional state of the elderly of our institution showed that 84.5% were normoweighted.
PARTICULARIDADES DE LA GESTIóN DE LA CALIDAD EN EMPRESAS DEL CONOCIMIENTO
Zulem Pérez Rodríguez
Ingeniería Industrial , 2005,
Abstract: En la economía de los a os 90 han aparecido sectores donde existe disponibilidad de los insumos y el conocimiento se manifiesta como el insumo crítico y limitado del crecimiento.1 La industria del software, la microelectrónica, la biotecnología, los nuevos materiales, las telecomunicaciones y la química fina son ejemplos de esto. En estos sectores se ubican las denominadas empresas del conocimiento,2 que tienen las siguientes características: El servicio es un proceso de solución de problemas en el que participan los clientes y un grupo de expertos. Los clientes tienen que ser tratados como individuos. La lógica del negocio se basa en la capacidad de los dirigentes para atraer a su personal y sus clientes, y combinar la capacidad de ambos para resolver problemas.El personal clave en estas empresas suele ser muy competente.Su "producción" es resolver problemas, y el proceso de solución de problemas es difícil de estandarizar. El modelo ISO 9000:2000, que refleja el consenso internacional en materia de gestión de la calidad, establece una serie de requisitos mínimos que hay que cumplir para poder gestionar adecuadamente la calida
Revitalización parcial del Hospital de las Cinco Llagas de Sevilla como sede del Parlamento de Andalucía
Rodríguez Pérez, Pedro
Informes de la Construccion , 1994,
Abstract: The Hospital of the Cinco Llagas of Sevilla was designed by Martín Gaínza in the middle of XVI century. It had patient's rooms disposed in the form of a double cross surrounded by patios with exterior perimetric aisles making up a large rectangular floor. The church, created by Hernán Ruiz el Mozo, is located in the principal patio and, with its height and its grim volume, it dominates the horizontal mass of the whole, representing a magnificent background for the esplanade which separates it from the Almohad city walls. Tills remarkable building which had preserved its medical function until a little longer than a decade ago, has been the seat of the Parliament of Andalucía since 28 February, 1992. This article is a brief summary of the history of the Hospital, its condition at the beginning of the eighties and of the studies, projects and the works carried out on the building in order to restore it and adapt it to the new use. El Hospital de las Cinco Llagas de Sevilla fue trazado por Martín de Gaínza a mediados del siglo XVI, disponiendo las salas de enfermos en doble crucero y rodeándolas por patios cuyas naves perimetrales exteriores completan una gran planta rectangular. La iglesia, creada por Hernán Ruíz el Mozo, se sitúa en el patio principal, dominando con su gran altura y su severo volumen la masa horizontal del conjunto, soberbio telón de fondo de la explanada que lo separa de la muralla almohade de la ciudad. El notable edificio, que ha conservado su función sanitaria hasta hace poco más de una década, es desde el veintiocho de febrero de 1992 la sede del Parlamento de Andalucía. Este artículo es un apretado resumen de la historia del viejo Hospital, de su estado a principio de los a os ochenta y de los estudios, proyectos y obras llevadas a cabo sobre él para restaurarlo y adaptarlo a los nuevos usos.
BOOK REVIEW / RESE A: COTO BAUTISTA, V. y TURZA FERRé, A., Tema a Tema
David Pérez Rodríguez
Ogigia. Revista Electrónica de Estudios Hispánicos , 2011,
Abstract:
BOOK REVIEW / RESE A: áLVAREZ DE CASTRO, Luis, Los inde nidos en espa ol
David Pérez Rodríguez
Ogigia. Revista Electrónica de Estudios Hispánicos , 2012,
Abstract:
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