Characterizations of bivariate conic, extreme value, and Archimax copulas

Based on a general construction method by means of bivariate ultramodular copulas we construct, for particular settings, special bivariate conic, extreme value, and Archimax copulas. We also show that the sets of copulas obtained in this way are dense in the sets of all conic, extreme value, and Archimax copulas, respectively

Implementación de una evaluación por competencias académicas en el pregrado de Economía de la Universidad del Magdalena, Colombia

RESUMEN: El objetivo de este artículo es presentar los resultados de una evaluación piloto en el enfoque de competencias académicas en el pregrado de Economía de la Universidad del Magdalena, aplicada para los cursos de Macroeconomía I, Estadística II, Finanzas Públicas y Economía Regional en el segundo semestre de 2018. Se muestra que una evaluación de este tipo arroja una medida sobre lo que un estudiante puede hacer con lo que aprendió. Así mismo, la metodología que permite definir las competencias de cada curso se establece en coherencia con el perfil profesional del pregrado. Este artículo contribuye a la literatura sobre la renovación de los métodos de evaluación en la educación superior en Colombia.ABSTARCT: This paper presents the results of an experimental test on proficiency-based assessment in Economics at University of Magdalena (Colombia), in the second half of 2018. The evaluation was carried out for Macroeconomics I, Statistics II and Public Finance and Regional Economics courses. After defining the competencies foreseen for each course based on the undergraduate student’s profile, the paper shows that this type of tests allows determining what a student can do with what they have learned. This paper contributes to the literature regarding the renewal of evaluation methods in higher education in Colombia

Identificación de una población de bien dotados

[Resumen] Este artículo recoge la identificación de sujetos bien dotados en los cursos de Primera (6-12 años) y 10 ciclos de ESO (13-14 años) en cinco centros públicos de la comunidad autónoma de España y para ello se construye una matriz de rasgos característicos de la población de bien dotados, que se les ha pasado a expertos de educación para preseleccionar a la muestra del estudio. Posteriorlnente se les aplicará los Test de Matrices Progresivas de Raven y el de AMPE.[Abstract] In this article we have pretended to identificate gifted children in the courses of Prünary (6-12 years old) and 10 cicle of secundary (13-14 years old) in five public centers of the Autonomy Comunity of Spain and for that we have elaborated a matrix to detected caracterist lines in the population of gifteg children. Fot that we have copilated the dates and give them to the exports of Education with the idea of preselection a sampling of our study. Tem we will apply severd tests like Progressive Matrix ofRaven and the AMPE (Secadas, 1961

Síndrome de Rett: identificación de una patología en nuestras aulas

[Resumen] Todavía no se ha establecido una adecuada orientación en el potencial de aprendizaje de los niños con Síndrome de Rett. (A.V.S.R.,1995). Por ello, pretendeInos exponer en este trabajo un enfoque dedicado a las estrategias de intervención u orientación, que ya han sido utilizadas con algunas niñas de forIna experimental en otros paises con relativo éxito. SabeInos que este síndrome afecta a las niñas, esta ligado al cromosoma X, que su reconocimiento y tratamiento como patología data de la década de los 60 cuando el profesor neuropsiquiatra Rett descubrió que en la sala de su consulta había dos niñas, que estaban haciendo el mismo movimiento estereotipado y decidió prestar atención a lo que les sucedía, dándole posteriormente, su nombre al síndrome que estudió tan detenidamente

Plant quality index of caracolillo (Ormosia macrocalyx Ducke), in nursery stage with controlled release fertilizers

Objective: To evaluate, in a nursery, the effect of two controlled release fertilizers in three concentrations on the growth components and quality index in caracolillo seedlings. Design/methodology/approach: A factorial arrangement (2 x 3) housed in a completely randomized design was used, with seven treatments and twelve repetitions. For three months the growth of caracolillo plants maintained in 310 cm3 polyethylene tubes, with a substrate of peat moss, vermiculite, agrolite and soil (2:1:1:1), plus controlled release fertilizer (FLC) Basacote® 9M (16-8-12) and Multicote® 12M (18-6-12), in three doses each: 10 (low), 20 (medium) and 30 kg m-3 (high), in addition to a control without conventional  fertilization (CF) Triple 17 (17N-17P-17K) in doses of 10 kg m-3. The variables height, diameter, leaf number, robustness index (IR), aerial/root dry biomass ratio (R BSA/BSR) and Dickson's quality index (ICD) were measured. The means were compared by Tukey's test at a 5% confidence level.  Results: Basacote® and Multicote® fertilizers in low doses allowed an adequate growth and development in caracolillo plants, which was reflected in the variables height, diameter and number of leaves. The IR and ICD indices presented values within the normal ranges, while those of R BSA/BSR were rather low, but in the three cases there were no statistical differences. Study limitations/implications: Based on the results obtained, it is recommended to continue monitoring the studied plants in the field, which would allow adjustments in the initial fertilization doses. Findings/conclusions: The low doses (10 kg m-3) of the controlled release fertilizers Basacote® and Multicote® showed the best results in the growth and development of the snail in the nursery stage, but the IR, R BSA / BSR and ICD indices did not present statistical differences.Objective: To evaluate, in a nursery, the effect of two controlled release fertilizers in three concentrations on the growth components and quality index in caracolillo seedlings. Design/Methodology/Approach: A factorial arrangement (2 x 3) housed in a completely randomized design was used, with seven treatments and twelve repetitions. For three months, the growth of caracolillo plants maintained in 310 cm3 polyethylene tubes, with a substrate of peat moss, vermiculite, agrolite and soil (2:1:1:1), plus controlled release fertilizer (CRF) Basacote® 9M (16-8-12) and Multicote® 12M (18-6-12), in three doses each: 10 (low), 20 (medium) and 30 kg m-3 (high), in addition to a control without conventional fertilization (CF) 17N-17P-17K in doses of 10 kg m-3. The variables height, diameter, leaf number, robustness index (RI), aerial/root dry biomass ratio (ADB/RDB R) and Dickson’s quality index (DQI) were measured. The means were compared by Tukey’s test at a 5% confidence level.  Results: Basacote® and Multicote® fertilizers in low doses allowed an adequate growth and development in caracolillo plants, which was reflected in the variables height, diameter and number of leaves. The RI and DQI indices presented values within the normal ranges, while those of ADB/RDB R were rather low, but in the three cases there were no statistical differences. Study Limitations/Implications: Based on the results obtained, it is recommended to continue monitoring the studied plants in the field, which would allow adjustments in the initial fertilization doses. Findings/Conclusions: The low doses (10 kg m-3) of the controlled release fertilizers Basacote® and Multicote® showed the best results in the growth and development of caracolillo in the nursery stage, but the RI, ADB/RDB R and DQI indices did not present statistical differences