A novel recursive algorithm for the calculation of the detailed identity coefficients

International audienceAbstractBackgroundA recursive algorithm to calculate the fifteen detailed coefficients of identity is introduced. Previous recursive procedures based on the generalized coefficients of kinship provided the detailed coefficients of identity under the assumption that the two individuals were not an ancestor of each other.FindingsBy using gametic relationships to include three, four or two pairs of gametes, we can obtain these coefficients for any pair of individuals. We have developed a novel linear transformation that allows for the calculation of pairwise detailed identity coefficients for any pedigree given the gametic relationships. We illustrate the procedure using the well-known pedigree of Julio and Mencha, which contains 20 Jicaque Indians of Honduras, to calculate their detailed coefficients.ConclusionsThe proposed algorithm can be used to calculate the detailed identity coefficients of two or more individuals with any pedigree relationship

Pruebas de selección como predictores del rendimiento académico de estudiantes de Medicina

ResumenIntroducciónPartiendo de la complejidad de los programas educativos de Medicina y de los estudios sobre la deserción de sus estudiantes, se estableció la necesidad de conocer la validez predictiva de los mecanismos que integran el proceso de selección de la Escuela de Medicina de la Universidad Anáhuac-Mayab, como mecanismo de mejora del proceso educativo.ObjetivoIdentificar el grado de predicción del rendimiento académico de los estudiantes, con base en los instrumentos de admisión considerados en la institución.MétodoSe trató de un estudio correlacional con enfoque cuantitativo realizado a través de un procedimiento de regresión lineal. Para su realización se reconocieron como variables independientes, los resultados obtenidos por los alumnos de la cohorte 2012 y 2013, en el proceso de admisión a la carrera, para cada uno de los instrumentos utilizados y como variable dependiente, el rendimiento académico, basado en los promedios de notas de los estudiantes, obtenidos en los semestres cursados hasta el momento de la realización del estudio, realizándose un análisis estadístico con la obtención de frecuencias, porcentajes, medias y valores mínimos y máximos, para posteriormente contrastar los valores en un procedimiento de regresión lineal.ResultadosCon base en el comportamiento de los datos analizados para ambas cohortes, se pudo observar que la prueba de selección que más correlaciona con el rendimiento académico es el promedio que obtienen los alumnos en los cursos propedéuticos, teniéndose una r de 0.603 y 0.629 para las cohortes 2012 y 2013, respectivamente, y una R2 de 0.364 y 0.396 en el mismo sentido.ConclusionesMás allá de la importancia de ampliar el estudio a otras generaciones, se observó la necesidad de evaluar la administración de los instrumentos utilizados hasta el momento, a partir de su valor de correlación y predicción, sin menoscabo de la posibilidad de perfeccionar la implementación del curso propedéutico.AbstractIntroductionBased on the complexity of medical education programs and studies on student dropout, the need to know the predictive validity of the mechanisms involved in the process of selection of the School of Medicine at Anahuac-Mayab University was established as a mechanism for improving the educational process.ObjectiveTo identify the degree of prediction of academic performance of students based on the tools used for considering admission into the institution.MethodThis was a correlational study with quantitative approach carried out using a linear regression procedure. To conduct the study, the variables used were, the results obtained by students in the cohort 2012 and 2013, in the process of admission to the course, for each of the tools used, and academic performance as the dependent variable, based on the average student grades obtained in the courses in semesters completed until the study. A statistical analysis was performed to obtain the frequencies, percentages, means and minimum and maximum values, later to contrast the values in a linear regression procedure.ResultsBased on the behaviour of the analysed data for both cohorts, it was observed that the screening test most correlated with academic achievement is the average obtained by students in the preparatory courses, taking an r of 0.603 and 0.629 for cohorts 2012 and 2013, respectively, and an R2 of 0.364 and 0.396 in the same direction.ConclusionsApart from the importance of extending the study to other generations, the need to evaluate the management of the tools used to date was observed, from the value of correlation and prediction, without prejudice to the possibility of improving the implementation of the preparatory course

Multiple Order Dual-Band Active Ring Filters with Composite Right/Left Handed Cells

In this paper, a novel dual-band active filter topology is presented. The non-linear phase response of a composite right/left-handed cell is used to achieve the desired dual-band performance. Additionally, the proposed structure based on coupled ring resonators yields a very compact solution in which high-order implementations can be easily obtained by cascading multiple rings. The theoretical principles of this type of filters are analyzed in detail. Finally, three prototypes based on first-, second- and third-order structures validate the feasibility of this type of filters. Good agreement between simulations and measurements has been achieved

Nuevas métricas de audiencia al servicio del Inbound Marketing

En el presente artículo se aborda la utilidad de las herramientas y métricas de audiencia surgidas en el entorno digital para desarrollar prácticas comunicativas de Inbound Marketing. Los objetivos que se persiguen son reconocer qué nuevos indicadores están utilizando las métricas de audiencia; identificar los datos que aportan para prácticas de inbound marketing y apreciar en qué permiten testar los contenidos y planificarlos. Para ello se identifican las principales herramientas de medición y los servicios que ofrecen, así como las métricas que permiten detectar los comportamientos y emociones de los usuarios frente a los mensajes, posibilitando testar los mismos y planificarlos para atraer la atención del público, retenerlo y fidelizarlo. Las conclusiones permiten ver cómo las nuevas métricas están reconfigurando la manera en la que se producen y distribuyen los contenidos, hasta llegar a convertirse en herramientas indispensables, que permiten identificar la capacidad de atracción, retención, fidelización y satisfacción de los usuarios frente a dichos contenidos. La analítica de datos ha pasado a ser una herramienta en la que los aspectos pragmáticos interseccionan con aspectos emocionales, permitiendo cuantificar la experiencia y la emoción más allá del hábito y posibilitando planificar los contenidos para adaptarlos a los requerimientos de los usuarios

DISEÑO E IMPLEMENTACIÓN DE UN COMPENDIO DE MÉTODOS DE PRUEBA APLICADOS AL CONTROL DE CALIDAD EN LA MANUFACTURA DE PERFILES DE ALUMINIO PARA EL LABORATORIO DE ANÁLISIS INDUSTRIALES E INVESTIGACIÓN DEL PROGRAMA EDUCATIVO DE INGENIERÍA INDUSTRIAL DEL CENTRO UNIVERSITARIO UAEM VALLE DE MÉXICO

DISEÑO E IMPLEMENTACIÓN DE UN COMPENDIO DE MÉTODOS DE PRUEBA APLICADOS AL CONTROL DE CALIDAD EN LA MANUFACTURA DE PERFILES DE ALUMINIO PARA EL LABORATORIO DE ANÁLISIS INDUSTRIALES E INVESTIGACIÓN DEL PROGRAMA EDUCATIVO DE INGENIERÍA INDUSTRIAL DEL CENTRO UNIVERSITARIO UAEM VALLE DE MÉXICOEl presente proyecto registra un contenido completo sobre los requerimientos del diseño e implementación de un compendio de métodos de prueba aplicados al control de calidad en la manufactura de perfiles de aluminio para el laboratorio de análisis industriales e investigación del programa educativo de ingeniería industrial del centro universitario UAEM valle de México. Para poder ejemplificar y dar a conocer estos métodos, la información se basa en las actividades realizadas dentro de la empresa Cuprum S.A. de C.V., lo cual ayuda a otorgar las tareas que hoy en día se llevan a cabo en este sector de la industria. En el capítulo 1 se da a conocer los pasos base del proceso de extrusión del aluminio de cómo se va formando hasta su figura final y traslado. En el capítulo 2 se aborda sobre los procesos de acabado y mecanizado de los perfiles de aluminio, lo cual da una mayor visión de las condiciones en las que los perfiles de aluminio son ocupados en sus múltiples usos y ocupaciones. En el capítulo 3 se detallan los elementos esenciales para que un perfil de aluminio tenga la condición de uso propicia para su usó ya que esto lo determina la aleación, el temple y las propiedades químicas y mecánicas que cada perfil requiera. En el capítulo 4 y 5 se aborda el tema de calidad y las normas que rigen nacional e internacionalmente la fabricación de perfiles de aluminio y de cuáles son las características que cada perfil debe cumplir para poder ser usado. En el capítulo 6 se dan a conocer los usos y aplicaciones más comunes en los que son usados los perfiles de aluminio. En el capítulo 7 se enuncian las soluciones propuestas a implementar en el laboratorio de Ingeniería, así como las evaluaciones de las mismas. Por último, se muestran como anexos las prácticas de liberación de los perfiles de aluminio con acabado anodizado, lo cual ayuda a los alumnos a conocer la importancia de los requisitos que debe cumplir cada perfil de aluminio y poder ser usado en el mercado

Noise Figure Measurement of Differential Amplifiers Using non-Ideal Baluns

This paper analyzes the noise and gain measurement of microwave differential amplifiers using two passive baluns. A general model of the baluns is considered, including potential losses and phase/amplitude unbalances. This analysis allows de-embedding the actual gain and noise performance of the isolated amplifier by using single-ended measurements of the cascaded system and baluns. Finally, measured results from two amplifier prototypes are used to validate the theoretical principles

Estimating radial railway network improvement with a CAS

The Spanish railway network is very complex, with two different track gauges: the broad classic Iberian track gauge and the so called international gauge, the latter used in the extensive high speed network. All new lines have been built with double track and top technologies. But there are controversial opinions among experts regarding how the network should grow. We had developed what we called isochrone circle graphs and a geometric index for radial railway networks improvement estimation, that can be very useful for decision taking regarding the improvement of railway lines. The corresponding paper was illustrated with a sketch constructed with a Dynamic Geometry System that used sliders to change the input parameters (timing to each peripheral destination and population of these destinations). Although very comfortable to use, altering the number of peripheral destinations considered required to construct a complete new sketch. To avoid this problem and in order to be able to perform symbolic computations and solve equations with the data obtained, we have begun from scratch and have designed and implemented a complete new package in the computer algebra system CAS Maple that takes as input the lists of destinations, timings and populations and builds the corresponding isochrone circle graphs and performs all the corresponding calculations. An important advantage of working in symbolic mode (i.e., of introducing parameters in the computations) is the possibility to work with unknowns (that represent network improvement goals) and consequently obtain the time improvement required in a line in order to ful ll a network speci c improvement goal

Audience Attention and Emotion in News Filmed with Drones: A Neuromarketing Research

Emotional journalism is being driven by audiovisual technology such as drones, also known as unmanned aerial vehicles, which have demonstrated their usefulness in transforming objective news into news stories from a new visual perspective, facilitating access to dangerous or difficult places. They also allow for greater immersion by an audience that has become an active participant in the news, and they contribute to the storytelling of communication despite the risk to privacy and security that their misuse might entail. The aim of this research is to determine the differences in attention and intensity of the emotions experienced when viewing two pieces of audiovisual news: One was filmed with the technological support of a drone, and the other was produced in the conventional way. The techniques of eye tracking and galvanic skin response were used in 30 Spanish university students. The results suggest that attention was focused on the most spectacular visual elements, although the images filmed with a drone received a higher concentration of attention from the subjects, and this attention was spread throughout the entire image, which demonstrates that drones enhance the effectiveness of panoramic images with natural landscapes. The greatest emotion generated by viewing the images recorded with drones was statistically significant, but it was limited exclusively to these particular scenes, and not to the entire recording of the news

Knit product of finite groups and sampling

A finite sampling theory associated with a unitary representation of a finite non-abelian group G on a Hilbert space is established. The non-abelian group G is a knit product N⋈H of two finite subgroups N and H where at least N or H is abelian. Sampling formulas where the samples are indexed by either N or H are obtained. Using suitable expressions for the involved samples, the problem is reduced to obtain dual frames in the Hilbert space ℓ2(G) having a unitary invariance property; this is done by using matrix analysis techniques. An example involving dihedral groups illustrates the obtained sampling results

Modeling Sampling in Tensor Products of Unitary Invariant Subspaces

The use of unitary invariant subspaces of a Hilbert space H is nowadays a recognized fact in the treatment of sampling problems. Indeed, shift-invariant subspaces of L-2( R) and also periodic extensions of finite signals are remarkable examples where this occurs. As a consequence, the availability of an abstract unitary sampling theory becomes a useful tool to handle these problems. In this paper we derive a sampling theory for tensor products of unitary invariant subspaces. This allows merging the cases of finitely/infinitely generated unitary invariant subspaces formerly studied in the mathematical literature; it also allows introducing the several variables case. As the involved samples are identified as frame coefficients in suitable tensor product spaces, the relevant mathematical technique is that of frame theory, involving both finite/infinite dimensional cases.This work has been supported by the Grant MTM2014-54692-P from the Spanish Ministerio de Economía y Competitividad (MINECO)