33rd Conference of the Venezuelan Mathematical Association. Title: “Estimation of aloin concentration in Aloe vera L. (Aloe barbadensis Mill.) by mathematical modeling.” Virtual. The Central University of Venezuela (UCV), Caracas, Venezuela, 2024.
5th Annual Loma Linda Workshop on Algorithms for Particle Imaging and Radiation Treatment Planning. “Core-annular flow modeling.” Loma Linda University Health, Loma Linda, CA, 2019. (http://ionimaging.org/llu2019-attendees/)
15th International Congress of Scientific Research. “Mathematical modeling of core-annular film flows with Re of Order 1 and insoluble surfactants at the interface.” MESCyT, Sheraton Hotel, Santo Domingo, Dominican Republic, 2019.
15th International Congress of Scientific Research. “Experiments with two-phase rods.” MESCyT, Sheraton Hotel, Santo Domingo, Dominican Republic, 2019.
3rd International Research Congress of the Inter-American Division. Talk title: “The origin of life by means of random mechanisms in the primeval soup and its relation to probabilities.” Northern Caribbean University, Jamaica, 2019.
3rd International Research Congress of the Inter-American Division. “A preliminary mathematical model for church growth.” Northern Caribbean University, Jamaica, 2019.
3rd International Research Congress of the Inter-American Division. “Integrating faith in a math class.” Northern Caribbean University, Jamaica, 2019.
14th International Congress of Scientific Research. “Mathematical modelling of the influence of electrical fields in the interior and the walls of the respiratory airways.” MESCyT, Sheraton Hotel, Santo Domingo, Dominican Republic, 2018.
4th Scientific Congress of the Dominican Adventist University (UNAD). “Some science problems that require mathematical modelling.” Dominican Adventist University (UNAD), Bonao, Provincia Monseñor Nouel, Dominican Republic, 2018.
1st International Science Symposium of FACIE and 4th Scientific Conference. Faculty of Science. “Mathematical modelling and theory of rigins.” Dominican Adventist University (UNAD), Bonao, Dominican Republic, 2018.
52nd Anniversary of the Math Department. “Derivation of mathematical models for biomedicine.” School of Sciences, University of Orient (UDO), Cumaná, Sucre, Venezuela, 2016.
13th Frontiers in Applied and Computational Mathematics (FACM-2016). “Non-linear stability of core-annular flows in pulmonary airways with an electrical field.” New Jersey Institute of Technology (NJIT), Newark, New Jersey, 2016.
29th Conference of the Venezuelan Mathematical Association. “The problem of two bubbles in a slow viscous flow.” The University of Zulia, Maracaibo, Venezuela, 2016.
28th Conference of the Venezuelan Mathematical Association. “Use of the asymptotic analysis for the derivation or creation of mathematical models that involve differential equations.” Central University of Venezuela, Caracas, Distrito Capital, Venezuela, 2015.
1st Congress for Investigation and Innovation. “Technological innovation through mathematical modeling and numerical simulation for oil and energy.” Territorial Polytechnic University of the West of Sucre (Universidad Politécnica Territorial del Occidente de Sucre UPTOS) Clodosbaldo Russián, Cumaná, Sucre, Venezuela, 2015.
10th Scientific Congress of UDO. “New frontiers in medicine arising from mathematics.” Universidad de Oriente, Bolívar Campus, Ciudad Bolívar, Venezuela, 2014.
27th Conference of the Venezuelan Mathematical Association. "Mathematical model for core-annular flow with the central fluid moving fast and surfactants at the interface."Midwestern University Lisandro Alvarado (UCOLA), Barquisimeto, (Lara), Venezuela, 2014.
1st Seminar in the Area of Petroleum and Energy. "Mathematical modeling and computational numerical simulation applied to oil and energy." ADP Talent and Attitude/Advisers for Professional and Personal Development, Maturin, Monagas, Venezuela, 2014.
Conference of Integration: Mathematical and Physical-Chemical Processes. “Applied and computational mathematics integrated to physics and chemistry processes.” Experimental National University of Guayana (UNEG), Puerto Ordaz, Bolívar, Venezuela, 2014.
2nd Conference on Mathematical Research and Education on Mathematics. “Mathematical methods for simulation.” Universidad Nacional Experimental de Guayana (UNEG), Puerto Ordaz, Venezuela, 2008.
Inaugural Conference at the XXVI Venezuelan School of Mathematics. "Mathematical modeling for core-annular flows." University of Los Andes, Mérida, 2013.
The XXVII Venezuelan School of Mathematics (EVM) and School of Mathematics in Latin America and the Caribbean (EMALCA). "Introduction to fluid mechanics and modeling." Faculty of Science, University of Los Andes, Mérida, Venezuela, 2014.
Seminar for Students of the Master's and Doctorate Degree in Mathematics. "Getting a mathematical model for pipe coating using two layers." Graduate Studies of Mathematics, University of Los Andes (ULA), Mérida, Venezuela, 2013.
Presentation before The Staff of the Mixed Company Petrodelta, Subsidiary of PDVSA. “Modeling in fluid dynamics.” Petrodelta, Maturín, Monagas, Venezuela, 2012.
Seminar of the Department of Mathematics. “Nonlinear stability of stratified fluid flows.” School of Sciences, Universidad de Oriente, Sucre Campus, Venezuela, 2012.
Numerical Analysis Group Seminar of The Department of Mathematics. "Presence of differential equations in science and its impact on the industry.” Faculty of Sciences, University of Los Andes, Mérida, Venezuela, 2009.
Numerical Analysis Group Seminar of the Department of Mathematics. “Nonlinear stability analysis for two immiscible fluids with a core-annular configuration and with insoluble surfactants along the interface." University of Los Andes, Mérida, Venezuela, 2009.
Colloquium of the Department of Mathematics. "Proposed study for the controllability of instabilities present at two fluid flow problems." University of Los Andes, Mérida, Venezuela, 2009.
Department of Basic Studies. "Differential equations and their impact on science and industry." Universidad de Oriente, Guaritos Extension, Maturin, Monagas Campus, Venezuela, 2009.
Applied Mathematics Colloquium IIMAS, Institute of Research in Applied Mathematics and Systems. "Behavior of a core-annular flow in the presence of insoluble surfactants." National Autonomous University of Mexico (UNAM), Mexico, 2008.
Anniversary Week of the Department of Mathematics. "Mathematical models for industry." School of Sciences, Universidad de Oriente, Cumaná, Venezuela, 2008.
Conference on Research and Education in Mathematics. "Applied statistics and computational mathematics for flows of two fluids." 1st Experimental National University of Guayana (UNEG), Puerto Ordaz, Venezuela, 2006.
2nd Forum on Pure and Applied Mathematics. "New frontiers in applied mathematics and computational fluid for two streams." Experimental National University of Guayana (UNEG), Department of Science and Technology, Puerto Ordaz, Venezuela, 2006.
Seminar of the Department of Mathematics. "Simulations using a mathematical model of the behavior of the interface between two fluids." Universidad de Oriente, Cumaná, Venezuela, 2005.
1st Seminary of Mathematics. Division of Research, Extension, Graduate Studies and Production. "Mathematical models involving partial differential equations - industrial applications." University Institute of Technology of Cumaná, Venezuela, 2005.
Seminar of The Department of Mathematics. "A mathematical model for core-annular flows with surfactants." Universidad de Oriente, Sucre Campus, Cumaná, Venezuela, 2004.
Seminar of the Department of Mathematics. "The method of separation of variables." Universidad de Oriente, Sucre Campus, Cumaná, Venezuela, 2003.
IV Mathematical Formation Workshop (TForMa). "Nonlinear stability of core-annular flows with surfactants." Universidad de Oriente, Cumaná, Venezuela, 2003.
Graduate Research Seminar Series of CAMS. "Interfacial hydrodynamics of annular films. 2nd part: Presence of a pressure gradient.” Center for Applied Mathematics and Statistics, New Jersey Institute of Technology (NJIT), Newark, NJ, 2001.
Graduate Research Seminar Series of CAMS. "Interfacial hydrodynamics of annular films. 1st part: Surfactant is incorporated to the problem.” Center for Applied Mathematics and Statistics, New Jersey Institute of Technology (NJIT), Newark, NJ, 2000.
Graduate Research Seminar Series of CAMS. "Interfacial hydrodynamics of annular films: Obtaining the equation of Hammond.” Center for Applied Mathematics and Statistics, New Jersey Institute of Technology (NJIT), Newark, NJ, 1999.
35th Anniversary of the Department of Mathematics of UDO. "Solving differential equations using mathematical programming." Department of Mathematics, Universidad de Oriente, Sucre Campus, Venezuela, 1993.