A5075894117- Advanced Statistical Process Monitoring
- Business, Innovation, and Economy
- Forecasting Techniques and Applications
- Advanced Statistical Methods and Models
- Statistical Methods and Inference
- Genetic Associations and Epidemiology
- Health and Lifestyle Studies
- Statistical Methods and Applications
- Statistical Distribution Estimation and Applications
- Business, Education, Mathematics Research
- Agricultural and Food Production Studies
- Urbanism, Landscape, and Tourism Studies
- Statistical Methods and Bayesian Inference
- Organizational Management and Innovation
- Statistical Methods in Clinical Trials
- Scientific Measurement and Uncertainty Evaluation
- Sports Performance and Training
- Sports and Physical Education Studies
- Bayesian Methods and Mixture Models
- Sports injuries and prevention
- Sensory Analysis and Statistical Methods
- Archaeological and Historical Studies
- Bioinformatics and Genomic Networks
- Regional Development and Innovation
- Housing Market and Economics
Universidad Nacional de Colombia
2015-2024
Colegio de Estudios Superiores de Administración
2022-2023
University of Cartagena
2020
Consejo Nacional de Investigaciones Científicas y Técnicas
2017
Departamento de Educación
2016
Universidad de Medellín
1995-2015
National University of San Juan
1995-2015
Ansys (Canada)
2015
UCLouvain Saint-Louis Brussels
2014
Saint Louis University Hospital
2014
The hedonic price regressions have mainly been used for inference. In contrast, machine learning employed on big data has a great potential prediction. To contribute to the integration of these two strategies, this article proposes approach regression analysis data, viz. real estate prices, both inferential and predictive purposes. methodology incorporates new procedure selecting variables, called 'incremental sample with resampling' (MINREM). is tested cases. first from web advertisements...
Vasicek (1976) proposed an estimator of entropy based on spacings. A new is proposed. This local linear regression. Comparisons between this and Vasicek's are made. The mean square error (MSE) the consistently smaller than MSE estimator.
We propose a new methodology to estimate λ, the parameter of Box-Cox transformation, as well an alternative method determine plausible values for it. The former is accomplished by defining grid λ and further perform normality test on -transformed data. optimum value say * , such that p-value from highest. set determined using inverse probability after plotting p-values against grid. Our illustrated with two real-world data sets. Furthermore, simulation study suggests our improves symmetry,...
The literature on GWAS (genome-wide association studies) data suggests that very large sample sizes (for example, 50,000 cases and controls) may be required to detect significant associations of genomic regions for complex disorders such as Alzheimer's disease (AD). Because the challenges obtaining cohorts, we describe here a novel sequential strategy combines pooling DNA bootstrapping (pbGWAS) in order significantly increase statistical power exponentially reduce expenses. We applied this...
Se sabe que sus momentos caracterizan a una distribución. Usando densidades generadas por la distribución se estudia, podemos analizar partes de original estén sombreadas aquellas con altas densidades.
Abstract Algorithms, data, and AI (ADA) technologies permeate most societies worldwide because of their proven benefits in different areas life. Governments are the entities charge harnessing ADA above beyond providing government services digitally. have potential to transform way governments develop deliver citizens, citizens engage with governments. Conventional public engagement strategies employed by limited both quality diversity deliberation between citizen governments, for be improve...
Se describe una nuevo metodo para la deteccion de valores p significativos. Este metodo, basado en el m-esimo estadistico orden distribucion U(0; 1), es adecuado casos los que se realizan m ! 1 pruebas hipotesis independientes y interes determinar aquellas son significativas, controlando falsos positivos, probabilidad error tipo I predeterminada. Adicionalmente, realiza comparacion con algunas clasicas grafica del prueba diferentes m. Finalmente ilustra uso metodologia dos conjuntos datos...
Combined natural convection and radiation in a two-dimensional horizontal annulus filled with radiatively participating gray medium is studied numerically by using control-volume-based finite difference method spectral collocation coupled an influence matrix technique. The mathematical model includes the continuity equation, incompressible Navier-Stokes equations, energy radiative transfer equation (RTE), which modeled P1 differential approximation. Computed results for two Rayleigh numbers,...
In this paper a weather system developed for crop protection in rural areas is presented. The consists of mini stations that are commanded by central station which processes the data collected and based on these, it generates alarms, either falling frost or appearance Zonda winds. system, addition to occurrence winds can predict with several hours advance possible formation, giving farmer very useful tool when having deal such events.
The median, one of the most popular measures central tendency widely-used in statistical practice, is often described as numerical value separating higher half sample from lower half. Despite its popularity and applications, many people are not aware existence several formulas to estimate this parameter. We present results a simulation study comparing classic Harrell & Davis (1982) estimators median for seven continuous distributions. It shown that, relatively latter, estimator...
Objetivo Elaborar curvas que relacionen el peso al nacer y edad gestacional, sirvan de estándar para la población recién nacidos en Colombia. Métodos Las fueron elaboradas utilizando los pesos producto embarazos finalizaron entre las semanas 22 44. Se elaboraron tres tablas con sus respectivas figuras, regresiones monótonas ajustadas sobre percentiles muestrales calculados diferentes estratos definidos por covariables sexo número semanas. Resultados construyeron porcentuales neonatos a...
We argue that depending on p-values to reject null hypotheses, including a recent call for changing the canonical alpha level statistical significance from .05 .005, is deleterious finding of new discoveries and progress science. Given blanket variable criterion levels both are problematic, it sensible dispense with testing altogether. There alternatives address study design determining sample sizes much more directly than does; but none tools should replace as magic method giving clear-cut...
This work aims to propose and argue a new antecedent (critical thinking: CT) of the hard soft dimensions continuous improvement (CI) using text mining perspective. The study employs proposed methodological framework for scientific (nine steps). sample consists 2,213 abstracts articles that address interest constructs in this from title. Three types variables are used: investigation, reference, control. article presents theoretical empirical evidence an original model conformed by six...
Elicitation methods aim to build participants' distributions about a parameter of interest. In most elicitation studies this is rarely known in advance and hinders an objective comparison between methods. two experiments, participants were first presented with fixed random sequence images numbers subsequently their subjective percentages one those was elicited. Importantly, the true percentage set advance. The experiment tested whether receiving instructions as method would assist estimating...
Proper inventory planning should incorporate factors changing over time, since static are not robust to this apparent variability. In models of inventories is necessary recognize the great demand uncertainty. This paper reviews state art most significant developments related models, especially those who consider dynamic demands in time. addition, forecasting and some techniques for optimizing analyzed, considering costs service levels, among others. literature review, gaps have been...
La complejidad de las cadenas suministro exige mejores métodos para programar los inventarios una empresa. En este trabajo se presenta comparación entre modelos pronósticos demanda múltiples productos, eligiendo el mejor entre: ARIMA, Suavización exponencial, Regresión Lineal Bayesiana y un Modelo Dinámico Bayesiano. Para ello, primero realiza simulación casos donde no hay Distribución Normal en series tiempo, segundo, estiman predicciones ventas tres productos estación servicios gasolina...
We argue that making accept/reject decisions on scientific hypotheses, including a recent call for changing the canonical alpha level from p = .05 to .005, is deleterious finding of new discoveries and progress science. Given blanket variable levels both are problematic, it sensible dispense with significance testing altogether. There alternatives address study design sample size much more directly than does; but none statistical tools should be taken as magic method giving clear-cut...