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Numerical Based Approach for Predicting the Response of Flexible Risers Under Oscillatory Flows at Low Re and KC Numbers
Get PDFFlexible riser response prediction relies on semi-empirical models hindered by limitations due experimental data scarcity for particular modelling considerations. This paper presents a numerical-based approach for predicting the flexible riser response under oscillatory flows. A single freedom degree spring-mass-damper system is employed with the mass allowed to move in cross-flow direction. To discretize the Navier-Stokes equations the Finite Volume Method is used. To analyse the flow patterns in each regime the cylinder oscillating period is executed for long time. A bi-dimensional model is setting up using OpenFOAM simulations. Flow behavior, hydrodynamic forces and frequencies were analyzed for Reynolds values between 40-1000 using a KC number 7,9. For Reynolds less than 300 the behavior is in agreement with the literature. For Reynolds 300 or higher, some discrepancies appear in the system dynamics. The numerical results obtained from the numerical approach shows good agreement with experimental data collected from a flexible riser model
Configuración multicriterio de células de fabricación considerando efecto sobre planes de producción
Get PDFIn competitive markets, flexibility is a key requirement to compete, group technology allows you to obtain this flexibility at a low cost, because it combines the advantages of mass production with the advantages of production by workshops Objective. Create a methodology that integrates the plans of: plant configuration, capacity and production, evaluating multiple criteria to select the grouping alternatives with better results. Materials and methods, five stages are articulated to achieve the objective: a. Creation of product families, b. Configuration of plant, capacity and production, c. Estimation of performance measures and d. Process of hierarchical analysis. Results: A consistent methodology is achieved regarding the sensitivity of the AHP evaluation of the performance measures, the individual variations in the criteria of the candidate configurations do not modify the decision found (configuration to be selected). Conclusion. It is possible to address the problem of cell formation considering an approach in which the problem is broken down into less complex sub-problems and thus include multiple grouping criteria at the time oriented to the environment where the methodology is appliedIn competitive markets, flexibility is a key requirement to compete, group technology allows you to obtain this flexibility at a low cost, because it combines the advantages of mass production with the advantages of production by workshops Objective. Create a methodology that integrates the plans of: plant configuration, capacity and production, evaluating multiple criteria to select the grouping alternatives with better results. Materials and methods, five stages are articulated to achieve the objective: a. Creation of product families, b. Configuration of plant, capacity and production, c. Estimation of performance measures and d. Process of hierarchical analysis. Results: A consistent methodology is achieved regarding the sensitivity of the AHP evaluation of the performance measures, the individual variations in the criteria of the candidate configurations do not modify the decision found (configuration to be selected). Conclusion. It is possible to address the problem of cell formation considering an approach in which the problem is broken down into less complex sub-problems and thus include multiple grouping criteria at the time oriented to the environment where the methodology is applied
Comparison between some techniques of interpolators: An application in engineering
Get PDFAbstract. This paper contains a detailed comparison between the Lagrange and Hermite polynomial interpolation when approximating a function. Initially the theoretical part about each interpolation procedure is exposed, followed by the exposure of the conditions of the comparative analysis between approximations, explaining the tests and calculating the error to be mad
Consumo de café en el Paisaje Cultural Cafetero de Colombia (PCCC): el "mal consumidor" y el auge de los cafés especiales
Get PDFDrawing from the results of a three months anthropological fieldwork research in the area of the eje cafetero, this article aims to dive into the question of local coffee consumption patterns in the Coffee Cultural Landscape of Colombia. The main object is to reflect on strategies of consumption in a patrimonial context by examining different discourses, ranging from the average “bad coffee consumer” to the slow rise of the chain of cafés especiales. Furthermore, the present article aims to offer a comprehensive analysis on how the structure of the coffee chain impacts consumption patterns, including a reflection on the benefits and limits of the development of specialty coffee.
Basado en los resultados de un trabajo antropológico de investigación de campo de tres meses en la zona del Eje Cafetero, este artículo tiene como fin profundizar en las prácticas de consumo de café en el Paisaje Cultural Cafetero de Colombia. El objetivo principal es presentar una reflexión sobre las estrategias de consumo en un contexto patrimonial, examinando diferentes discursos, desde la imagen del “mal consumidor” hasta el desarrollo de la cadena de los cafés especiales. El enfoque del presente artículo ofrece un análisis comprensivo sobre cómo las estructuras de la caficultura impactan en las prácticas de consumo, incluyendo una reflexión sobre los beneficios y los límites del desarrollo de los cafés especiales
The transnational feminist movement in the Americas in the 1930s
Get PDFThis paper aims to study how a transnational feminist movement emerged in the Americas and had a significant period of activity in the 1930s. It examines its goals and political strategies, as well as the impact of collective mobilization. Mobilizing collectively at the transnational and international level allowed feminists from the American continent to gain some victories as well as political legitimacy.We will see how mobilizing collectively at the continental level served them as a strategy of struggle to acquire symbolic or material resources. At times, it increased the legitimacy of feminism that feminists were unable to obtain in their countries. The detour by the international was therefore extremely useful to them to put pressure on their governments. Besides, they did not conceive of their struggles in isolation. They believed that in order to obtain civil and political rights, but also the maintenance of peace on the continent, they had to build a collective struggle that transcended their borders
Las dos Ansermas. Seguimiento documental al traslado de una población
Get PDFJorge Robledo funda la ciudad de Santana (San Juan) y la iglesia Mayor Santa María de los Caballeros en cierta sabana en una Provincia que los indios llaman Guarma. Con el aditamento de poderla trasladar si se encontraba un mejor lugar, lo cual sucede casi de manera inmediata, pues la primera fundación la hace más para hacerse a la tierra por la presión de los conquistadores que venían de Cartagena tras Juan Vadillo. La primera ubicación se cree que es un sitio cercano a Belén de Umbría y la segunda en el Cerro de Anserma.
El aditamento del que se hace mención es un poderoso elemento que luego es utilizado (hipótesis mía) para la traslación en 1717 a un sitio que estaba incluido en los límites de la ciudad y que se llamaba Las Lajas.
La ciudad se funda con el nombre de Santana; luego, se cambia por San Juan y finalmente, Anserma. Último nombre verdaderamente autóctono derivado de Anser, sal para los indios, aunque la provincia en general se llama Humbra
Estrongiloidiasis diseminada en un paciente con neurilemoma maligno
Get PDFLa estrongiloidiasis es una infección parasitaria endémica de áreas tropicales, subtropicales, relacionada a las desventajas de vivir en zonas extremadamente pobres e insalubres. Las tasas de prevalencia varían ampliamente. Los pacientes inmunosuprimidos, pueden desarrollar un síndrome de hiperinfección o enfermedad diseminada debido a la capacidad del parásito de reproducirse den-tro del huésped, como es el caso que se presenta donde los factores de riesgo más comunes para estas complicaciones son la inmunosupresión causada por los corticosteroides y la infección por el virus linfotrópico T humano tipo 1, que conllevan a una mortalidad elevada cercana al 90%
Episiotomía estado del arte. Una muestra conductual en los partos del Hospital Universitario Hernando Moncaleano Perdomo- Agosto a octubre del 2016
No full textEpisiotomy is a common intervention used in maternity ward. It isdefined as a type of surgery in the perineum intended to facilitatethe expulsion of the product extending the birth canal. This hassome indications for its realization. The objetive of our study was toevaluate the episiotomy reasons in HUHMP, analyze whether this isdone by maternal-fetal indications, the assess the implementation ofa selective episiotomy may protect against lacerations and a reviewof the relevant and current literature on this subject. The total was of214 patients in the period of August, September and October 2016.Of which 103 (48.13%) were primigravidae, and non primigravidaewere 111 (51.86%).In the primigravidae group the tearing grade 1 (17.51%), tearing grade2 (21.63%) tearing Grade 3 (0%) and tear Grade 4 (1.03%), withouttearing (39.14%); this group of Patients underwent episiotomy(25.75%). In non primigravidae I was tear grade 1 (32.19%), teargrade 2 (14.43%) tearing Grade 3 (0%) and tear Grade 4 (0%),without tearing (68.82%), this group of Patients Were episiotomyPerformed (7.77%)When episiotomies were performed were taken as indication Shortperineum and poorly compliant con un 19,3%, shortening the periodexpulsive 16%, prevention tear and shortening of Labor 6.4%, 3.2%primiparousAnd in 58% of Patients Who episiotomy was performedin they had no indication describedLa episiotomía es una intervención común usada en las salas de partos. Se define como la realización un tipo de intervención quirúrgica en el periné́ que pretende facilitar la expulsión del producto ampliando el canal blando del parto. Este tiene unas indicaciones para su realización. El objetivo de nuestro estudio fue evaluar las razones para la realización de episiotomía en el HUHMP, analizar si esta se realiza según las indicaciones maternas-fetales, evaluar cuanto la implementación de una episiotomía selectiva puede proteger contra las laceraciones perineales y realizar una revisión de la literatura relevante y actual en este tema. El total de pacientes fue 214 en el periodo de Agosto, Septiembre y Octubre DEL 2016. De las cuales 103 (48.13%) fueron primigestantes, y las no primigestantes fueron 111(51.86%). En cuanto a la presencia de desgarros en las primigestantes se encontró desgarro grado 1 (17.51%), desgarro grado 2 ( 21.63%) desgarro grado 3 (0%) y desgarro grado 4 ( 1.03%), sin desgarro (39.14%),a este grupo de pacientes se les realizo episiotomía a (25.75%). En las no primigestantes fue desgarro grado 1 (32.19%), desgarro grado 2 ( 14.43%) desgarro grado 3 (0%) y desgarro grado 4 ( 0%), sin desgarro (68.82%),a este grupo de pacientes se les realizo episiotomía a (7.77%) Cuando se realizaron episiotomías se tuvieron como indicación periné corto y poca distensibilidad con un 19.3%, acortamiento del periodo expulsivo 16%, prevención de desgarro y acortamiento de trabajo de parto 6.4%, primigestante 3.2% Y en el 58% de las pacientes en quienes se realizó episiotomía no tenían indicación descrita