DA. Ciencias Sociales
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- PublicaciónRestringidoAnálisis y Simulación de Modelos Económicos Complejos mediante el Enfoque de Dinámica de Sistemas(2018-03) Orlandoni Merli, Giampaolo; Ramoni Perazzi, JosefaLos fenómenos socio-económicos se han ido conformando cada vez más en fenómenos altamente complejos, cuyo análisis y solución requiere de metodologías y herramientas también más complejas e innovadoras. Basándose en el modelo de caos de Lorenz, este trabajo estudia modelos económicos que generan comportamientos caóticos, utilizando como metodología de análisis la dinámica de sistemas, enfoque que permite representar, analizar y resolver las ecuaciones diferenciales no lineales que definen dichos modelos. Del mismo modo, se simulan diferentes trayectorias para las ecuaciones planteadas, haciendo cambios en las condiciones iniciales de las variables de estado, y se hace análisis de sensibilidad sobre los parámetros relevantes de los sistemas definidos. Además, este trabajo presenta una breve sinopsis de la metodología de dinámica de sistemas y simula este tipo de modelos complejos caóticos; para ello se construyen modelos de simulación que pueden generar trayectorias dinámicas para las variables de estado consideradas, usando software apropiado para tal fin, como Madonna y Powersim,
- PublicaciónRestringidoEffects of climate change on the resources of the rural ecosystem, a view from farmer perspectives(IOP Conf. Series: Journal of Physics: Conf. Series 1386 (2019) 012147, 2019-10-24) Núñez Rodríguez, José-de-JesúsThis paper presents the results obtained from the categorization of the social representations of farmer groups on the effects of climate change on the biodiversity of their farms, developed in a rural area of the Colombian Andes. A mixed methodology was used throughout the analysis of the behavior of rainfall and temperature between the years 2010-2017 and the implementation of an open survey on 144 farmers, of which its data was analyzed using descriptive and inferential statistics through descriptive estimators and an analysis of variance and multiple comparison mean tests, respectively. Furthermore, a qualitative analysis, supported by Corbin and Strauss' Grounded Theory, was carried out on 18 farmer families using semi-structured interviews. The hypothesis testing determined the existence of significant differences between the mean temperatures of the years observed when obtaining a value of Fc = 3.50, highly significant at 1%, and a value of Fc = 2.79, significant at 5%, P<0.05, for the mean rainfall. In the descriptive analysis, farmers' perception of the negative effects of climate change was evident in the decrease in the availability of water from natural sources (80.6%), deterioration in water quality (50.0%), variations in rainfall intensity (82.0%) and in local bimodal rainfall patterns (79.0%). The inferential analysis determined that the proportion of farmers reporting a disappearance of species due to intense heat or rainfall differs significantly from the level of p<0.05, over those who reported that these conditions have not caused variations in flora and fauna. The qualitative analysis verified the effects of climate change on rural biodiversity resources, which were expressed in 4 emerging categories: 1) Biodiversity resources in the process of extinction, 2) resilient resources, 3) emerging biodiversity, and 4) new agricultural business opportunities. The findings reveal that from a farmers' perspective climatic variations are affecting species of fauna and flora in rural communities.
- PublicaciónRestringidoLearning styles for algebra concepts: The case of engineering students at the Universidad de Santander (Valledupar, Colombia)(London : IntechOpen, 2019., 2019-12-15) Vidal-Tovar, C. R.; Valle-Fuentes, H; Rios-Dominguez, I. C.; Castro-Alfaro, A. F.The objective of this research was to evaluate the learning styles for algebra concepts of the students of the industrial engineering program of the University of Santander, Valledupar, Cesar, Colombia. A descriptive study was developed, consisting of 40 algebra students and 6 mathematics teachers, the questionnaire is self-administered elaborated with a dichotomous scale for the student and for interpretation of the means, a scale was designed based on a scale between zero and five that reveals the score obtained in said test, the styles studied were active, reflective, theoretical and pragmatic. Concluding that the predominant style is the pragmatic and theoretical, which allowed to select and apply strategies aimed at generating interactivity between students and teachers around the knowledge of algebra.
- PublicaciónRestringidoObtaining a sugar syrup from the use of the extract of the guácimo fruit (Guazuma ulmifolia lam)(IOP Conf. Series: Materials Science and Engineering 844 (2020) 012004, 2019-12-15) Vidal Tovar, Carlos Ramón; Cadavid Osorio, C. A.; Angulo Blanquicett, Giovanna-Elvira; Severiche-Sierra, C. A.The main objective of this work was to elaborate a sugary syrup from the use of Guácimo fruit extract (Guazuma Ulmifolia Lam) using the leaching method (solid - liquid), which can be used as a partial or total substitute for sugar. The experimental design that was applied for the extraction process was a factorial design 23; the data obtained were evaluated with the software Statgraphics. Once the extracts were obtained, physico-chemical tests were carried out and reductive sugars and dextrose equivalent were determined in each one. To obtain the syrup, the four extracts having the highest% ED were concentrated at constant temperature and time (50 ° C and 4 hours); The determination of the presence of reducing sugars was done using the techniques of colorimetric analysis (miller’s method) and chromatography (HPLC). The products that were obtained during the process were extreme conversion syrups with a range of dextrose equivalents of 90.13% - 98.27%. The syrup that obtained the highest percentage of equivalent dextrose (J3) was subjected to a sensory hedonic test, which consisted of 3 samples of sweetened coffee at different concentrations of sweet sugar syrup and sugar (sucrose), where M1 contained 80% sugar syrup of guácimo and 20% of table sugar. M2 contained 50% guácimo sugar syrup and 50% table sugar. M3 contained 100% sugar guacimo syrup and 0% table sugar. The results showed that the mixture that obtained the highest organoleptic acceptance was M2, followed by M3, which states that the syrup can substitute partially the common sugar. The above data allow the guácimo fruit to be taken into account as an alternative raw material for the production of sugar syrups and other products aimed at human consumption.
- PublicaciónRestringidoScientific reasoning skills and patterns of use of Information and Communication Technologies. the case of the students of the Universidad de Santander (Valledupar, Colombia)(IOP Conf. Series: Materials Science and Engineering 844 (2020) 012007, 2019-12-15) Angulo Blanquicett, Giovanna-Elvira; Vidal-Tovar, C. R.; Rios-Dominguez, I. C.This research establishes the relationship that has had the development of the skills of scientific reasoning and the patterns of use of tools and resources of information and communication technology (ICT). For that, it is necessary to use Lawson Test and to have into account ICT National Standards for students that USA International Society for Technology in Education (ISTE) suggest. Also, this paper is tackled from a nonexperimental design featuring a correlational – transectional range. The population consists of 2035 students from a higher education institution of the Colombian Caribbean coast. Besides, stratified random sampling is used defining, defining strata and a representative sample for academic programs. Personal survey was used to collect information. The existence of relationship between scientific reasoning skills and patterns of use of information and communication technology was confirmed.
- PublicaciónRestringidoStyles of reasoning according to the taxonomy structure of observed learning outcome of John Biggs in the students of geometry of the specialty of mathematics(IOP Conf. Series: Journal of Physics: Conf. Series 1329 (2019) 012005, 2019-10-01) Fernández, E.; Nieto Sánchez, Zulmary-Carolina.; Mendoza, L.Abstract. The objective of this investigation was to determine the styles of reasoning according to the taxonomy structured of observed learning objectives of John Biggs in the students of geometry of the specialty of mathematics of the “Universidad Pedagógica Experimental Libertador”, Venezuela. The stated problem is that teachers of mathematics must know the problems of teaching mathematics; besides, they should know how their students learn, since according to the reasoning styles of John Biggs, one can determine how and with what depth a person learns. The methodology is quantitative, not experimental, and descriptive at the field level, where specialized literature was reviewed, and the results obtained from the application of the test with the super-item, as a data collection instrument, were analyzed by objectives based on the construction of the database in statistical package for the social sciences, the statistical analysis and the detailed interpretation of the procedure performed for each item, which allowed the analysis and interpretation of the results. These results reach the uni-structural level catalogued by Biggs as inferior or superficial. Therefore, recommendations are offered to improve the learning level of the students in question.