Interconexiones eléctricas y su enfoque regulatorio analizados desde el derecho comparado

Artículo de reflexiónEste artículo aborda la regulación sobre interconexiones eléctricas que se ha dado en materia regional, analizando detalladamente las características que han implementado los diversos mercados regionales para llevar a cabo de manera efectiva intercambios de electricidad, de igual manera plantea unas alternativas regulatorias que podrían ser tenidas en cuenta en el desarrollo del proyecto SINEA que actualmente desarrolla el marco regulatorio para interconexiones eléctricas entre los países miembros CAN.INTRODUCCIÓN 1. CONSIDERACIONES PREVIAS 2. ORIGEN DE LA ENERGIA Y EL MERCADO 3. TRANSACCIONES INTERNACIONALES DE ELECTRICIDAD 4. CARACTERIZACION DE LAS INTERCONEXIONES ELECTRICAS 5. PRACTICAS COLOMBIANAS EN CUANTO A INTERCONEXION ELECTRICA CONCLUSIONES BIBLIOGRAFIAPregradoAbogad

Poder de mercado en mercados spot de generación eléctrica: metodología para su análisis

Después de analizar las experiencias internacionales relacionadas con el monitoreo y control de poder de mercado, se establece una metodología acorde a las características del pool eléctrico en Colombia, la cual permite hacer seguimiento sobre comportamientos estratégicos respecto al precio en bolsa en este mercado. Se propone un modelo exponencial para la función de oferta en el pool basado en un modelo de precios spot, explicado por los costos, las condiciones climáticas, las intervenciones de la Comisión de Regulación de Energía y Gas, la demanda diaria, las cantidades generadas y el precio histórico. Por medio de una convolución (técnica similar a la de un Filtro de Kalman) sobre los precios históricos se estiman los parámetros y elasticidades dinámicas asociadas a las cantidades que determinan el comportamiento del precio en bolsa. A su vez, estas estimaciones son utilizadas en la estructura de beneficios en un modelo de Cournot, de competencia en cantidades, que evidencia el efecto positivo, vía disminución del precio de bolsa, de mayores niveles de contratos a futuros en el pool eléctrico colombiano

Mass & secondary structure propensity of amino acids explain their mutability and evolutionary replacements

Why is an amino acid replacement in a protein accepted during evolution? The answer given by bioinformatics relies on the frequency of change of each amino acid by another one and the propensity of each to remain unchanged. We propose that these replacement rules are recoverable from the secondary structural trends of amino acids. A distance measure between high-resolution Ramachandran distributions reveals that structurally similar residues coincide with those found in substitution matrices such as BLOSUM: Asn Asp, Phe Tyr, Lys Arg, Gln Glu, Ile Val, Met → Leu; with Ala, Cys, His, Gly, Ser, Pro, and Thr, as structurally idiosyncratic residues. We also found a high average correlation (\overline{R} R = 0.85) between thirty amino acid mutability scales and the mutational inertia (I X ), which measures the energetic cost weighted by the number of observations at the most probable amino acid conformation. These results indicate that amino acid substitutions follow two optimally-efficient principles: (a) amino acids interchangeability privileges their secondary structural similarity, and (b) the amino acid mutability depends directly on its biosynthetic energy cost, and inversely with its frequency. These two principles are the underlying rules governing the observed amino acid substitutions. © 2017 The Author(s)

Autoestima como variable psicosocial predictora de la actividad física en personas mayores

Suplemento de artículos seleccionados con revisión del Congreso Andaluz de Psicología de la Actividad Física y el Deporte (13 : 2011 : Sevilla). Editores : José Carlos Caracuel ; Rocío Bohórquez.The purpose of this study was to investigate the relationship between self-esteem expressed by people over 65 years of age and taking part in physical activity. Self-concept and self-esteem are psychologically fundamental components of quality of life in adulthood and well-being. Selfesteem has been proposed as an area of intervention to improve the quality of life in the senior population. The sample was composed of more than 184 people, 92 of whom took part in physical activity on a regular basis and another 92, who developed sedentary lifestyles. The results of the Rosenberg Self-Esteem Questionnaire applied to the sample showed different levels of self-esteem between seniors who are physically active and those who are not, with self-esteem being significantly higher in active seniors. Studies with similar objectives demonstrate and support the verification of the hypothesis that establishes a positive relationship between self-esteem and participation in physical activity

Suspension effect in tip-over stability and steerability of robots moving on terrain discontinuities

[ES] En este artículo se estudia el efecto que produce el sistema de suspensión sobre la estabilidad al vuelco y la capacidad de direccionamiento en un robot móvil Skid Steer, cuando este se enfrenta a distintas discontinuidades del terreno: descenso (frontal y lateral) y ascenso sobre escalones, además del desplazamiento sobre zanjas. Específicamente, se estudió el instante cuando se generan cargas de impacto producto del movimiento del robot sobre la irregularidad del terreno. En cada caso se hizo un análisis correlacional del efecto sobre la estabilidad al vuelco y el direccionamiento (cuantificadas con métricas fundamentadas en las fuerzas de reacción de las ruedas con el suelo), al variar cuatro parámetros que definen el sistema de suspensión: constante de rigidez en los resortes, constante de amortiguamiento en los amortiguadores y las constantes de rigidez y amortiguamiento en las ruedas. Por último se estimó para cada caso, qué magnitudes deberían adquirir estos parámetros para garantizar una mejor estabilidad y direccionamiento del robot.[EN] This article studies the effect produced by the suspension system in tip-over stability and steerability of a Skid Steer mobile robot, when it faces different terrain discontinuities: descent (front and side) and ascent on steps, plus displacement over ditches. Specifically, the moment was studied when impact loads producted by the robot's movement on the irregularity of the terrain are generated. In each case, a correlational analysis was made about the effect in tip-over stability and steerability (quantified with metrics based on the reaction forces of the wheels with the ground), by varying four parameters that define the suspension system: stiffness constant in the springs, damping constant in the dampers and the stiffness and damping constants in the wheels. Finally, it was estimated for each case, what magnitudes these parameters should acquire to ensure better stability and steerability of robot.Este trabajo ha sido realizado parcialmente gracias al apoyo del Decanato de Investigación de la Universidad Nacional Experimental del Táchira bajo los proyectos 01-025-2016 y 01-008-2018.García, JM.; Valero, A.; Bohórquez, A. (2020). Efecto de la suspensión en la estabilidad al vuelco y direccionamiento de robots moviéndose sobre discontinuidades de terreno. Revista Iberoamericana de Automática e Informática industrial. 17(2):202-214. https://doi.org/10.4995/riai.2020.12308OJS202214172Abo-Shanab, R., & Sepehri, N., 2005. Tip-over stability of manipulator-like mobile hydraulic machines. Journal of Dynamic Systems, Measurement and Control , 127 (2), 295-301. https://doi.org/10.1115/1.1898239Bluethmann, B., Herrera, E., Hulse, A., Figuered, J., Junkin, L., Markee, M., y otros., 2010. An active suspension system for lunar crew mobility. IEEE Aerospace Conference, (págs. 1-9). Big Sky. https://doi.org/10.1109/AERO.2010.5446895Bruzzone, L., Fanghella, P., & Quaglia, G., 2017. Experimental performance assessment of mantis 2, hybrid leg-wheel mobile robot. International Journal of Automation Technology , 11 (3), 396-403. https://doi.org/10.20965/ijat.2017.p0396Chen, S., Li, X., Zhou, J., Wu, W., Yuan, S., & Liu, S., 2017. Modelling the vertical dynamics of unmanned ground vehicle with rocker suspension. Proceedings of IEEE International Conference on Mechatronics and Automation, (págs. 370-375). Takamatsu. https://doi.org/10.1109/ICMA.2017.8015845Chokor, A., Talj, R., Charara, A., Shraim, H., & Francis, C., 2016. Active suspension control to improve passengers comfort and vehicle's stability. IEEE 19th International Conference on Intelligent Transportation Systems (ITSC), (págs. 296-301). Rio de Janeiro. https://doi.org/10.1109/ITSC.2016.7795570Cordes, F., Kirchner, F., & Babu, A., 2018. Design and field testing of a rover with an actively articulated suspension system in a Mars analog terrain. Journal of Field Robotics , 35 (7), 1149-1181. https://doi.org/10.1002/rob.21808Cordos, N., & Todorut, A., 2019. Influences of the suspensions characteristics on the vehicle stability. En N. Burnete, & B. Varga (Ed.), Proceedings of the 4th International Congress of Automotive and Transport Engineering (AMMA 2018) (págs. 808-813). Cham: Springer. https://doi.org/10.1007/978-3-319-94409-8_94Deremetz, M., Lenain, R., & Thuilot, B., 2017. tiffness and damping real-time control algorithms for adjustable suspensions : A strategy to reduce dynamical effects on vehicles in off-road conditions. IFAC-PapersOnLine , 50 (1), 1958-1964. https://doi.org/10.1016/j.ifacol.2017.08.1565Ellery, A., 2016. Rover mobility and locomotion. En Planetary Rovers, Springer Praxis Books (págs. 71-132). Berlin: Springer, Heidelberg. https://doi.org/10.1007/978-3-642-03259-2_4Funde, J., Wani, K., Dhote, N., & Patil, S., 2019. Performance analysis of semi-active suspension system based on suspension working space and dynamic tire deflection. En U. Chandrasekhar, L. Yang, & S. Gowthaman (Ed.). (págs. 1-15). Singapure: Springer. https://doi.org/10.1007/978-981-13-2697-4_1García, J. M., Gil, A., & Sánchez, E. (2018). Desarrollo de una arquitectura de software para el robot móvil Lázaro. Ingeniare , 26 (3), 376-390. https://doi.org/10.4067/S0718-33052018000300376García, J. M., Martínez, J. L., Mandow, A., & García-Cerezo, A., 2017b. Caster-leg aided maneuver for negotiating surface discontinuities with a wheeled skid-steer mobile robot. Robotics and Autonomous Systems , 91, 25-37. https://doi.org/10.1016/j.robot.2016.12.007García, J. M., Martínez, J. L., Mandow, A., & García-Cerezo, A., 2015b. Steerability analysis on slopes of a mobile robot with a ground contact arm. Proc. 23rd Mediterranean Conference on Control and Automation, (págs. 267-272). Torremolinos, Spain. https://doi.org/10.1109/MED.2015.7158761García, J. M., Medina, I., Cerezo, A. G., & Linares, A., 2015a. Improving the static stability of a mobile manipulator using its end effector in contact with the ground. IEEE Latin American Transactions , 13 (10), 3228-3234. https://doi.org/10.1109/TLA.2015.7387226García, J., Medina, I., Martínez, J., García-Cerezo, A., Linares, A., & Porras, C., 2017a. Lázaro: robot móvil dotado de brazo para contacto con el suelo. Revista Iberoamericana de Automática e Informática industrial , 14 (1), 174-183. https://doi.org/10.1016/j.riai.2016.09.012Goga, V., & Kl'úcik, M., 2012. Optimization of vehicle suspension parameters with use of evolutionary computation. Procedia Engineering , 48, 174-179. https://doi.org/10.1016/j.proeng.2012.09.502Hurel, J., Mandow, A., & García-Cerezo, A., 2013. Los sistemas de suspensión activa y semiactiva: una revisión. Revista iberoamericana de automática e informática , 10 (2), 121-132. https://doi.org/10.1016/j.riai.2013.03.002Kang, S., Lee, W., Kim, M., & Shin, K., 2005. Robhaz-rescue: Rough-terrain negotiable teleoperated mobile robot for rescue mission. IEEE International Workshop on Safety, Security and Rescue Robotics, (págs. 105-110). Kobe.Lei, X., Zhang, G., Li, S., Qian, H., & Xu, Y., 2017. Dual-spring AGV shock absorption system design: Dynamic analysis and simulations. IEEE International Conference on Robotics and Biomimetics (ROBIO), (págs. 1-7). Macau. https://doi.org/10.1109/ROBIO.2017.8324559Li, B., Ma, S., Liu, J., Wang, M., Liu, T., & Wang, Y., 2009. Amoeba-I: a shape-shifting modular robot for urban search and rescue. Advanced Robotics , 23 (9), 1057-1083. https://doi.org/10.1163/156855309X452485Liu, Y., Meng, X., & Zhang, M., 2008. Research on mobile manipulator tip-over stability and compensation. 8th WSEAS International Conference on Robotics, control and Manufacturing Technology, (págs. 114-120). Hangzhou.Luo, Z., Shang, J., Wei, G., & Ren, L., 2018. Module-based structure design of wheeled mobile robot. Mechanical Sciences , 9 (1), 103-121. https://doi.org/10.5194/ms-9-103-2018Mihon, L., & Lontiș, N., 2019. Modeling and analysis of a vehicle suspension. En N. Burnete, & B. Varga (Ed.), Proceedings of the 4th International Congress of Automotive and Transport Engineering (AMMA 2018), (págs. 113-121). https://doi.org/10.1007/978-3-319-94409-8_14Moosavian, A., Alipour, K., & Bahramzadeh, Y., 2007. Dynamics modeling and tip-over stability of suspended wheeled mobile robots with multiple arms. IEEE/RSJ International Conference on Intelligent Robots and Systems, (págs. 1210-1215). San Diego. https://doi.org/10.1109/IROS.2007.4398999Reid, W., Pérez-Grau, F., Göktogan, A., & Sukkarieh, S., 2016. Actively articulated suspension for a wheel-on-leg rover operating on a martian analog surface. IEEE International Conference on Robotics and Automation (ICRA), (págs. 5596-5602). Stockholm. https://doi.org/10.1109/ICRA.2016.7487777Sert, E., & Boyraz, P., 2017. Optimization of suspension system and sensitivity analysis for improvement of stability in a midsize heavy vehicle. Engineering Science and Technology, an International Journal , 20, 997-1012. https://doi.org/10.1016/j.jestch.2017.03.007Suresh, A., Ajithkumar, N., Kalathil, S., Simon, A., Unnikrishnan, V., Mathew, D., y otros., 2017. An advanced spider-like rocker-bogie suspension system for mars exploration rovers. En J. Kim, F. Karray, P. Sincak, & G. Myung (Ed.), Robot Intelligence Technology and Applications 4. Advances in Intelligent Systems and Computing. 447, págs. 423-447. Springer. https://doi.org/10.1007/978-3-319-31293-4_34Yang, L., Cai, B., Zhang, R., Li, K., & Wang, R., 2018. A new type design of lunar rover suspension structure and its neural network control system. Journal of Intelligent & Fuzzy Systems , 35 (1), 269-281. https://doi.org/10.3233/JIFS-169586Zhang, J., Jia, X., Zhao, Z., & Gao, R., 2015. Optimization of Positioning Parameters for McPherson Front Suspension based on ADAMS/Car. International Conference on Computer Science and Mechanical Automation (CSMA), (págs. 297-301). Hangzhou. https://doi.org/10.1109/CSMA.2015.66Zhang, S., Zhao, X., Su, W., Wu, H., Dai, Z., & Chen, Z., 2019. The design of suspension mechanism and analysis of obstacle ability to rescue robots. En K. Deng, Z. Yu, S. Patnaik, & J. Wang (Ed.), Recent Developments in Mechatronics and Intelligent Robotics. ICMIR 2018. Advances in Intelligent Systems and Computing. 856, págs. 677-685. Cham: Springer. https://doi.org/10.1007/978-3-030-00214-5_8

The Zanclean megaflood of the Mediterranean – Searching for independent evidence

About six million years ago, the Mediterranean Sea underwent a period of isolation from the ocean and widespread salt deposition known as the Messinian Salinity Crisis (MSC), allegedly leading to a kilometer-scale level drawdown by evaporation. One of the competing scenarios proposed for the termination of this environmental crisis 5.3 million years ago consists of a megaflooding event refilling the Mediterranean Sea through the Strait of Gibraltar: the Zanclean flood. The main evidence supporting this hypothesis is a nearly 390 km long and several hundred meters deep erosion channel extending from the Gulf of Cádiz (Atlantic Ocean) to the Algerian Basin (Western Mediterranean), implying the excavation of ca. 1000 km3 of Miocene sediment and bedrock. Based on the understanding obtained from Pleistocene onshore megaflooding events and using ad-hoc hydrodynamic modeling, here we explore two predictions of the Zanclean outburst flood hypothesis: 1) The formation of similar erosion features at sills communicating sub-basins within the Mediterranean Sea, specifically at the Sicily Sill; and 2) the accumulation of the eroded materials as megaflood deposits in areas of low flow energy. Recent data show a 6-km-wide amphitheater-shaped canyon preserved at the Malta Escarpment that may represent the erosional expression of the Zanclean flood after filling the western Mediterranean and spilling into the Eastern Basin. Next to that canyon, a ~1600 km3 accumulation of chaotic, seismically transparent sediment has been found in the Ionian Sea, compatible in age and facies with megaflood deposits. Another candidate megaflood deposit has been identified in the Alborán Sea in the form of elongated sedimentary bodies that parallel the flooding channel and are seismically characterized by chaotic and discontinuous stratified reflections, that we interpret as equivalent to gravel and boulder megabars described in terrestrial megaflood settings. Numerical model predictions show that sand deposits found at the Miocene/Pliocene (M/P) boundary in ODP sites 974 and 975 (South Balearic and Tyrrhenian seas) are consistent with suspension transport from the Strait of Gibraltar during a flooding event at a peak water discharge of ~108 m3 s−1

EFECTO DE LA FRECUENCIA DE RIEGO SOBRE LA EFICIENCIA DEL RIEGO Y LA PRODUCCIÓN DE UN CULTIVO DE FRESA

[EN] The effect on crop yield of several daily drip-irrigation frequencies was investigated for strawberry (Fragaria x anannasa) on sandy soil for one experiment conducted during 2013 to 2014 irrigation season. T1, T2 and T3 treatments were daily irrigated with 5, 10, and 15 minutes irrigation pulses and the same overall irrigation time. Therefore, these treatments received the same amount of irrigation water. T4 was daily irrigated according to the irrigation practices of the farmer. Irrigation frequency had little effect on yield. In all treatments production exceeded 900 g plant-1 , resulting in 3% and 7% reductions of significant yield of T2 and T1 treatments with respect to T3 and T4. No significant differences were detected between T3 and T4 treatments. Probably, the fall of T1 and T2 yields were due to a water stress induced by the distribution uniformity decrease when high irrigation frecuencies were applied. These results suggest that 15 minutes irrigation pulses are adequate for this type of soils. There was no yield benefit for short time irrigation pulses and, therefore, they were not advisable. T3 irrigation efficiency was 79% versus 42% for T4. In all irrigation treatments water use effciciency were around 23 Kg m-3 .[ES] Este experimento ha permitido conocer los efectos del riego por pulsos de diferente duración y frecuencia sobre la eficiencia del riego y la producción de un cultivo de fresa. El trabajo se realizó sobre un suelo arenoso del entorno de Doñana. Se hizo un ensayo con cuatro tratamientos y cuatro repeticiones. Los tres primeros fueron regados diariamente con la misma cantidad de agua, aplicando pulsos de 5 (T1), 10 (T2) y 15 (T3) minutos de duración. El cuarto tratamiento (T4) recibió el riego de la parte comercial de la finca, con pulsos diarios de 15 minutos aproximadamente. En el tratamiento T3 se obtuvieron ahorros de agua del 44% sin pérdida de producción, con respecto a la parte comercial de la finca (T4), y pérdidas de cosecha de tan solo el 3% para el de pulsos de duración intermedia (10 minutos). El tratamiento de pulsos más cortos, T1, experimentó una pérdida de producción del 7%, probablemente como consecuencia de la menor uniformidad de distribución del riego en estas condiciones y, por tanto, un mayor déficit hídrico en algunos puntos del invernadero. Por tanto, podemos concluir que los pulsos de riego entre 10 y 15 minutos serían los más aconsejables en este tipo de suelos. Además, pulsos muy cortos, como los del T1, deberían ser evitados. La eficiencia del riego del tratamiento más productivo (T3) fue del 79%, mientras que la finca tuvo una eficiencia media del 42%. Las producciones superaron los 1,000 g planta-1 en el tratamiento de pulsos “largos” (T3) y en el T4. Además, las eficiencias en el uso del agua obtenidas en los diferentes tratamientos fueron muy similares, situándose alrededor de 23 Kg m-3 .Gavilán, P.; Ruiz, N.; Lozano, D.; Bohórquez, JM.; Molina, F. (2015). EFECTO DE LA FRECUENCIA DE RIEGO SOBRE LA EFICIENCIA DEL RIEGO Y LA PRODUCCIÓN DE UN CULTIVO DE FRESA. En XXXIII CONGRESO NACIONAL DE RIEGOS. Valencia 16-18 junio de 2015. Editorial Universitat Politècnica de València. https://doi.org/10.4995/CNRiegos.2015.1425OC

Corporate Taxes and Firms’ Performance: Evidence from an Emerging Economy

Corporate taxes play an important role in a firm’s decision-making as they are part of the cost of capital. Thus, understanding the effect of taxes on the performance of firms in the context of frequent tax reforms, as is the case of Colombia, is of great relevance. We used the meta-frontier stochastic techniques, which allow us to estimate in two steps the technical efficiency of firms within each economic sector and between economic sectors in relation to the set of firms in the country. Then, using quantile regression analysis, we estimate both the effect of corporate taxation on firm performance as well as the effect of efficiency on firms’ tax payments. Results indicate that firms in some economic sectors could be benefiting from better production conditions, and that the most efficient firms within each sector paid more taxes as a share of assets. However, when compared to the meta-frontier, firms with higher efficiency paid less taxes, suggesting differences in the firms’ tax burden across economic sectors

Technical and clinical evaluation of a closed loop TIVA system with SEDLineTM spectral density monitoring: Multicentric prospective cohort study

Introduction: Closed loop total intravenous anesthesia is a technique in which the patient’s hemodynamic and anesthetic depth variables are monitored, and based on this information, a computer controls the infusion rate of drugs to keep them within pre-established clinical parameters. Objective: To describe the technical and clinical performance of a closed loop system for total intravenous anesthesia with propofol and remifentanil, using the SEDLineTM monitor Design: Multicentric prospective cohort study Setting: Surgery room Patients: ASA I-II undergoing elective surgery Measurements: The authors designed a closed loop system that implements a control algorithm based on anesthetic depth monitoring and the Patient State Index (PSITM) of the SEDLine monitor for propofol, and on hemodynamic variables for remifentanil. The measurement of clinical performance was made based on the percentage of PSITM maintenance time in the range 20–50. Precision analysis was evaluated by measuring median performance error (MDPE) can be defined as the median difference between actual and desired values, which refers to the degree of precision in which the controller is able to maintain the control variable within the objective set by the anesthesiologist; it represents the direction (over-prediction or underprediction) of performance error (PE) rather than size of errors, which is represented by MDAPE, median absolute percentage error, Wobble index, which is used for measuring the intrasubject variability in performance error. Results: Data were obtained from 93 patients in three healthcare centers. The percentage of PSITM maintenance time in the 20–50 range was 92% (80.7–97.0). MDPE was 10.7 (− 11.0–18.0), MDAPE 21.0 (14.2– 26.8) and wobble 10.7 (7.0–16.9). No adverse surgical or anesthetic events were found

Aprendendo a e-empreender: valorização da iniciativa empreendedora em futuros professores em e.s.o., bachillerato, f.p. e ensinamentos de línguas

Resumen: Introducción: El presente estudio analiza las diferencias en la intención emprendedora del alumnado de la rama de Educación Física en la primera y última semana de clases del MAES. Objetivos: El objetivo general de este trabajo es analizar la intención de emprendimiento en estudiantes universitarios del Máster Universitario de Profesorado de Educación Secundaria de la Universidad de Sevilla. Métodos: En el estudio participaron 24 alumnos, 5 mujeres y 19 hombres, de entre 22 y 28 años (M= 24,17; DT= 1,97). La intención emprendedora se evaluó a través del Cuestionario de Intención Emprendedora de Jaén y Liñán (2013). Resultados y discusión: Los resultados indicaron que no existen diferencias estadísticamente significativas antes y después de cursar el Máster Universitario en Profesorado en Enseñanza Secundaria Obligatoria y Bachillerato Formación Profesional y Enseñanzas de Idiomas, por lo que parece que este Máster no incide sobre el aspecto emprendedor expuesto en la Competencia General 12 “Fomentar el espíritu crítico, reflexivo y emprendedor”. Conclusiones: El estudio y análisis de las variables socio-demográficas indica que los hombres son algo más emprendedores que las mujeres, aunque no de forma significativa.Abstract: Introduction: The present study analyzes the differences in the entrepreneurial intention of the students of the Physical Education branch in the first and last week of MAES classes Aim: The general objective of this work is to analyze the intention of entrepreneurship in university students of the University Master's Degree in Secondary Education at the University of Seville. Methods: 24 students, 5 women and 19 men, aged between 22 and 28 years (M = 24.17; DT = 1.97) participated in the study. Entrepreneurial intention was evaluated through the Entrepreneurial Intention Questionnaire of Jaén and Liñán (2013). Results & discussion: The results indicated that there are no statistically significant differences before and after completing the University Master's Degree in Teaching in Compulsory Secondary Education and Baccalaureate Vocational Training and Language Teaching, so it seems that this Master does not affect the entrepreneurial aspect exposed in the General Competence 12 "Promote a critical, reflective and entrepreneurial spirit". Conclusions: The study and analysis of socio-demographic variables indicates that men are somewhat more entrepreneurial than women, although not significantly.Resumo: Introdução: Este estudo analisa as diferenças de intenção empreendedora dos alunos do ramo de Educação Física na primeira e na última semana de aulas do MAES. Objectivos: O objetivo geral deste trabalho é analisar a intenção do empreendedorismo em estudantes universitários do Mestrado Universitário em Ensino Secundário da Universidade de Sevilha. Métodos: Participaram do estudo 24 estudantes, 5 mulheres e 19 homens, com idades entre 22 e 28 anos (M = 24,17; TD = 1,97). A intenção empreendedora foi avaliada através do Questionário de Intenção Empreendedora de Jaén e Liñán (2013). Resultados e discussão: Os resultados indicaram que não existem diferenças estatisticamente significantes antes e após a conclusão do Mestrado Universitário em Ensino no Ensino Secundário Obrigatório e Bacharelado em Formação Profissional e Ensino de Idiomas, pelo que parece que este Mestrado não afeta o aspecto empreendedor exposto na Competência Geral 12 "Promover um espírito crítico, reflexivo e empreendedor". Conclusões: O estudo e a análise de variáveis sociodemográficas indicam que os homens são um pouco mais empreendedores do que as mulheres, embora não sejam significativamente