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438.453  Articles
1 of 43.846 pages  |  10  records  |  more records»
The aim of this study was to characterize electron contamination of a flattened (FF) and an unflattened (FFF) Varian Clinac iX 6X and 15X photon beams using Monte Carlo (MC) simulation. EGSnrc MC technique was used to model the flattened and unflattened h... see more

This paper presents results of punching tests carried out in four reinforced concrete flat slabs, one of them without shear reinforcement and others strengthened with CFRP dowels. Slabs were 1000 mm square meters and 60 mm thick and were subjected to mid ... see more

 This paper is on multi-carrier wireless communication system, focusing on the physical layer in such modulation system. Multi-Carrier MC system has received much attention in modern communication technology and is finding attractive applications. Th... see more

Water structure and dynamics are affected by the presence of a nearby interface. Here, first we review recent results by molecular dynamics simulations about the effect of different carbon-based materials, including armchair carbon nanotubes and a variety... see more

Diagnóstico prenatal ecográfico del Síndrome Klippel-Trenaunay-Weber: a propósito de un caso / Prenatal sonographic diagnosis of Klippel-Trenaunay-Weber syndrome: a case reportDiagnóstico prenatal ecográfico del Síndrome Klippel-Trenaunay-Weber: a propósito de un caso / Prenatal sonographic diagnosis of Klippel-Trenaunay-Weber syndrome: a case reportEl estudio del feto utilizando ultrasonido en tiempo real es uno de los avances tecnológicos más importantes de los últimos tiempos, permitiendo obtener información acerca de su integridad anatómica y funcional, así como establecer el diagnóstico de defectos congénitos en las etapas tempranas del embarazo. El Síndrome Klippel-Trenaunay-Weber fue originalmente reportado por Maurice Klippel y P. Trenaunay en 1900, el hallazgo clínico más frecuente es el angioma plano o nevus flammeus. Se presenta un caso de una gestante de 18 años, primigesta, con antecedente de salud previo, que acude a la consulta por presentar Hb AS. El estudio ecográfico realizado a las 22 semanas de gestación reveló marcada hipertrofia del miembro inferior izquierdo fetal asociado a hemangioma cavernoso gigante que afectaba pelvis, nalgas y genitales. Tales hallazgos guiaron al diagnóstico de Síndrome Klippel-Trenaunay-Weber. Esta entidad clínica es considerada una rareza, siendo su diagnóstico prenatal ecográfico poco conocido por lo que se presenta el caso.Palabras clave: Síndrome de Klippel-Trenaunay-Weber, ULTRASONOGRAFÍA PRENATAL.ABSTRACTThe study of the fetus using the ultrasound in real time is one of the most important technological advances of recent days; which allow collecting information about anatomic and functional integrity as well as establishing the diagnosis of congenital malformations in early stages of pregnancy. Klippel-Trenaunay-Weber syndrome was first reported by Maurice Klippel and P. Trenaunay in 1900, the most frequent clinical finding is the flat angioma or flammeus nevus. An 18 years old primigravida having health records attended to the office presenting HbAS. The sonographic study carried out at 22 weeks of pregnancy revealed a marked hypertrophy of the lower fetal limb associated with giant cavernous angioma affecting the pelvis, buttocks and genitals. Such findings guided to the diagnosis of Klippel-Trenaunay-Weber syndrome. This is a rare clinical entity and its antenatal diagnosis is little- known, thus the case is presented.Key words: Klippel-Trenaunay-Weber syndrome, PRENATAL ULTRASONOGRAPHY.

ABSTRACTThe study of the fetus using the ultrasound in real time is one of the most important technological advances of recent days; which allow collecting information about anatomic and functional integrity as well as establishing the diagnosis of congen... see more

Las salinas conforman territorios de características singulares y paisajes de especial encanto. Su estudio implica efectuar una doble aproximación: desde un punto de vista objetivo, que considera los elementos y fenómenos que tienen lugar en un determinad... see more

The article presents a mechanism to prolong service life of flat cars (including the unique transporter flat cars) using the simulation – expertise – statistic method of managing the individual life cycle. Recommendations to decrease the utilization rate ... see more

Introduction: This study investigates basic dosimetric properties of unflattened 6 MV photon beam shaped by multileaf collimator and compares them with those of flattened beams.Materials and Methods: Monte Carlo simulation model using BEAM code was develo... see more

En el presente artículo se integra el uso de un software de diseño mecánico y un algoritmo de simulación de la operación de un colector solar de placa plana, con el objetivo de simplificar el proceso de diseño y manufactura de este último. Se exponen los ... see more

1 of 43.846 pages  |  10  records  |  more records»