Search results for "modeling"
showing 10 items of 4489 documents
Ecologists overestimate the importance of predictor variables in model averaging: a plea for cautious interpretations.
2014
Abstract: Information-theory procedures are powerful tools for multimodel inference and are now standard methods in ecology. When performing model averaging on a given set of models, the importance of a predictor variable is commonly estimated by summing the weights of models where the variable appears, the so-called sum of weights (SW). However, SWs have received little methodological attention and are frequently misinterpreted. We assessed the reliability of SW by performing model selection and averaging on simulated data sets including variables strongly and weakly correlated to the response variable and a variable unrelated to the response. Our aim was to investigate how useful SWs are …
Modeling the Sustainable Educational Process for Pupils from Vulnerable Groups in Critical Situations: COVID-19 Context in Lithuania, Latvia, and Est…
2022
The critical situation in education caused by COVID-19 has significantly reduced the involvement of pupils from vulnerable groups, particularly those with low learning achievements. The aim of this study is to reveal the modeling of the sustainable educational process and the factors that ensure optimal learning achievements of pupils from vulnerable groups in general education schools in critical educational transformation situations. To reveal the factors ensuring the sustainability of educational processes, this study was conducted in three Baltic countries (Lithuania, Latvia, and Estonia) involving 1432 subject teachers from public education schools. The results of the study highlight t…
Primārās un sekundārās modelēšanas sistēmas dzejas tekstos: Mihaila Lotmana teorētiskās pieejas piemērošana
2016
Saskaņā ar Tartu-Maskavas semiotikas skolas idejām, dabiskā valoda veido primāro modelēšanas sistēmu, uz kuras pamata tiek konstruētas augstāka līmeņa kultūras sistēmas (sekundārās modelēšanas sistēmas). Mihails Lotmans ir pārskatījis klasisko modelēšanas teoriju, un saskaņā ar viņa piedāvāto teoriju primārās un sekundārās modelēšanas sistēmas ir relatīvas viena pret otru, un tajās jēdziens „valoda” tiek šķirts no jēdziena „semiotikas sistēma”. Esošā pētījuma mērķis ir piemērot semiotikas metodes, balstītas uz Mihaila Lotmana izveidotās struktūras, Eiropas un Āfrikas mītiski reliģiskajām modelēšanas sistēmām Nigērijas dzejnieka Kristofera Okigbo darbos. Pētījuma rezultāti rāda, ka šī strukt…
Fuel cell analytical modeling: Solving the trade-off between accuracy and complexity
2013
In this paper, a 5.5 kW Proton Exchange Membrane fuel cell is modeled. The proposed analytical model is described and the parameters identification procedure is further discussed. Simulation results of all three sub-models are compared to test the accuracy of each one. A comparison between simulation and experimental results is provided as well validating the modeling approach.
Evaluation of greenhouse gas emissions from membrane bioreactors: development of a new mathematical model
2013
Properties-morphology-processing relationships in polymer based clay nanocomposites
2009
Modelling of proffesional competences in health care units – preliminary assumptions
2023
Purpose: The aim of the article is to present the theoretical assumptions of the model of professional competencies in health care units. It was assumed that competences are a multidimensional concept and require an integrated approach that allows for the construction of a competency model that reflects their real complexity. A list of professional competencies will be presented, which will be subject to empirical verification in the course of future research by the authors in order to identify key competencies. Design/methodology/approach: The proposed lists of professional competencies (six domains) was created and are based on the analysis of healthcare competencies models - the study of…
Modelización de riesgos climáticos y sistemas de vigilancia y alerta en la Comunitat Valenciana
2013
El primer objetivo de esta Tesis está relacionado con el desarrollo e implementación de diferentes sistemas de vigilancia y alerta para el territorio de la Comunitat Valenciana: un sistema de predicción meteorológica en tiempo real basado en el modelo atmosférico de mesoescala Regional Atmospheric Modeling System (RAMS) y un sistema de previsión del Índice UV (UVI), basado en el modelo Santa Barbara DISORT Atmospheric Radiative Transfer (SBDART). Además, se propone una metodología que proporciona un entorno computacional adecuado para la administración y coordinación de los diferentes procesos implicados en ambos sistemas de vigilancia. La principal mejora de la predicción UVI es la utiliza…
Micromechanical Modeling of Aortic Pathologies
2021
Towards a General Definition of Modeling
2010
What is a model? Surprisingly, in philosophical texts, this question is asked (sometimes), but almost never – answered. Instead of a general answer, usually, some classification of models is considered. The broadest possible definition of modeling could sound as follows: a model is anything that is (or could be) used, for some purpose, in place of something else. If the purpose is “answering questions”, then one has a cognitive model. Could such a broad definition be useful? Isn't it empty? Can one derive useful consequences from it? I'm trying to show that there is a lot of them.