Evaluación del conocimiento sobre esperanza matemática y juegos equitativos en estudiantes de bachillerato

Este trabajo presenta un estudio exploratorio de evaluación de los conocimientos de estudiantes de Bachillerato sobre la esperanza matemática, que es considerada por Heitele más intuitiva que la de variable aleatoria e incluso que la de probabilidad. En el contexto de juegos equitativos analizamos las respuestas de una muestra de 63 estudiantes de Bachillerato a dos tareas con dos apartados, informando de la corrección de las respuestas y errores mostrados y comparándolos con los resultados obtenidos por otros autores

Significado personal del enfoque frecuencial de la probabilidad en profesores en formación

En el marco de una investigación sobre evaluación del conocimiento probabilístico de los profesores en formación, en este trabajo presentamos un análisis detallado de las respuestas a dos problemas, sobre concepción frecuencial de la probabilidad, tomados de Green (1983), en una muestra de 167 profesores en formación de educación primaria de la Universidad de Granada, que comparamos con los resultados obtenidos por los alumnos de 10-14 años, participantes en la investigación de Cañizares (1997). Este estudio ha permitido poner de manifiesto la gran variedad de significados personales (Godino, Batanero & Font, 2007) y mostrar que existen importantes dificultades relacionadas con la comprensión del concepto

An integrated approach for designing in-time and economically sustainable emergency care networks: A case study in the public sector

[EN] Emergency Care Networks (ECNs) were created as a response to the increased demand for emergency services and the ever-increasing waiting times experienced by patients in emergency rooms. In this sense, ECNs are called to provide a rapid diagnosis and early intervention so that poor patient outcomes, patient dissatisfaction, and cost overruns can be avoided. Nevertheless, ECNs, as nodal systems, are often inefficient due to the lack of coordination between emergency departments (EDs) and the presence of non-value added activities within each ED. This situation is even more complex in the public healthcare sector of low-income countries where emergency care is provided under constraint resources and limited innovation. Notwithstanding the tremendous efforts made by healthcare clusters and government agencies to tackle this problem, most of ECNs do not yet provide nimble and efficient care to patients. Additionally, little progress has been evidenced regarding the creation of methodological approaches that assist policymakers in solving this problem. In an attempt to address these shortcomings, this paper presents a three-phase methodology based on Discrete-event simulation, payment collateral models, and lean six sigma to support the design of in-time and economically sustainable ECNs. The proposed approach is validated in a public ECN consisting of 2 hospitals and 8 POCs (Point of Care). The results of this study evidenced that the average waiting time in an ECN can be substantially diminished by optimizing the cooperation flows between EDs.The authors would like to express his gratitude to Giselle Polifroni Avendaño for supporting this research.Ortiz-Barrios, MA.; Alfaro Saiz, JJ. (2020). An integrated approach for designing in-time and economically sustainable emergency care networks: A case study in the public sector. 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PLOS ONE, 13(8), e0203316. doi:10.1371/journal.pone.0203316Turner, J., Coster, J., Chambers, D., Cantrell, A., Phung, V.-H., Knowles, E., … Goyder, E. (2015). What evidence is there on the effectiveness of different models of delivering urgent care? A rapid review. Health Services and Delivery Research, 3(43), 1-134. doi:10.3310/hsdr03430Porter, M. E., & Kramer, M. R. (2018). Creating Shared Value. Managing Sustainable Business, 323-346. doi:10.1007/978-94-024-1144-7_16Wilson, K. J. (2013). Pay-for-Performance in Health Care. Quality Management in Health Care, 22(1), 2-15. doi:10.1097/qmh.0b013e31827dea50Ortiz Barrios, M. A., Escorcia Caballero, J., & Sánchez Sánchez, F. (2015). A Methodology for the Creation of Integrated Service Networks in Outpatient Internal Medicine. Ambient Intelligence for Health, 247-257. doi:10.1007/978-3-319-26508-7_24Glickman, S. W., Kit Delgado, M., Hirshon, J. M., Hollander, J. E., Iwashyna, T. J., Jacobs, A. K., … Branas, C. C. (2010). Defining and Measuring Successful Emergency Care Networks: A Research Agenda. Academic Emergency Medicine, 17(12), 1297-1305. doi:10.1111/j.1553-2712.2010.00930.xCalvello, E. J. B., Broccoli, M., Risko, N., Theodosis, C., Totten, V. Y., Radeos, M. S., … Wallis, L. (2013). Emergency Care and Health Systems: Consensus-based Recommendations and Future Research Priorities. Academic Emergency Medicine, 20(12), 1278-1288. doi:10.1111/acem.12266Stoner, M. J., Mahajan, P., Bressan, S., Lam, S. H. F., Chumpitazi, C. E., Kornblith, A. E., … Kuppermann, N. (2018). Pediatric Emergency Care Research Networks: A Research Agenda. Academic Emergency Medicine, 25(12), 1336-1344. doi:10.1111/acem.13656Navein, J. (2003). The Surrey Emergency Care System: a countywide initiative for change. Emergency Medicine Journal, 20(2), 192-195. doi:10.1136/emj.20.2.192Martinez, R. (2010). Keynote Address-Redefining Regionalization: Merging Systems to Create Networks. Academic Emergency Medicine, 17(12), 1346-1348. doi:10.1111/j.1553-2712.2010.00945.xA discrete event simulation model of an emergency department network for earthquake conditions. 6th International Conference on Modeling, Simulation, and Applied Optimization, ICMSAO 2015—Dedicated to the Memory of Late Ibrahim El-Sadek; 2015.Preparedness of an emergency department network for a major earthquake: A discrete event simulation-based design of experiments study. Uncertainty Modelling in Knowledge Engineering and Decision Making—Proceedings of the 12th International FLINS Conference, FLINS 2016; 2016.Salisbury, C., & Bell, D. (2010). Access to urgent health care. Emergency Medicine Journal, 27(3), 186-188. doi:10.1136/emj.2009.073056Mousavi Isfahani, H., Tourani, S., & Seyedin, H. (2019). Lean management approach in hospitals: a systematic review. International Journal of Lean Six Sigma, 10(1), 161-188. doi:10.1108/ijlss-05-2017-0051Ahmed, S., Manaf, N. H. A., & Islam, R. (2013). Effects of Lean Six Sigma application in healthcare services: a literature review. Reviews on Environmental Health, 28(4). doi:10.1515/reveh-2013-0015Furterer, S. L. (2018). Applying Lean Six Sigma methods to reduce length of stay in a hospital’s emergency department. Quality Engineering, 30(3), 389-404. doi:10.1080/08982112.2018.1464657Romero-Conrado, A. R., Castro-Bolaño, L. J., Montoya-Torres, J. R., & Jiménez Barros, M. Á. (2017). Operations research as a decision-making tool in the health sector: A state of the art. DYNA, 84(201), 129. doi:10.15446/dyna.v84n201.57504Modeling the Healthcare Services in Hilla Emergency Department. ICOASE 2018—International Conference on Advanced Science and Engineering; 2018.Ibrahim, I. M., Liong, C.-Y., Bakar, S. A., Ahmad, N., & Najmuddin, A. F. (2018). Estimating optimal resource capacities in emergency department. Indian Journal of Public Health Research & Development, 9(11), 1558. doi:10.5958/0976-5506.2018.01670.4Bedoya-Valencia, L., & Kirac, E. (2016). Evaluating alternative resource allocation in an emergency department using discrete event simulation. SIMULATION, 92(12), 1041-1051. doi:10.1177/0037549716673150Baril, C., Gascon, V., & Vadeboncoeur, D. (2019). Discrete-event simulation and design of experiments to study ambulatory patient waiting time in an emergency department. Journal of the Operational Research Society, 70(12), 2019-2038. doi:10.1080/01605682.2018.1510805Combined forecasting of patient arrivals and doctor rostering simulation modelling for hospital emergency department. IEEE International Conference on Industrial Engineering and Engineering Management; 2018.Hussein, N. A., Abdelmaguid, T. F., Tawfik, B. S., & Ahmed, N. G. S. (2017). Mitigating overcrowding in emergency departments using Six Sigma and simulation: A case study in Egypt. Operations Research for Health Care, 15, 1-12. doi:10.1016/j.orhc.2017.06.003Integrated simulation and data envelopment analysis models in emergency department. AIP Conference Proceedings; 2016.Ortiz Barrios, M., Felizzola Jiménez, H., & Nieto Isaza, S. (2014). Comparative Analysis between ANP and ANP- DEMATEL for Six Sigma Project Selection Process in a Healthcare Provider. Lecture Notes in Computer Science, 413-416. doi:10.1007/978-3-319-13105-4_62Ortiz Barrios, M. A., & Felizzola Jiménez, H. (2016). Use of Six Sigma Methodology to Reduce Appointment Lead-Time in Obstetrics Outpatient Department. Journal of Medical Systems, 40(10). doi:10.1007/s10916-016-0577-3Ortiz-Barrios, M. A., Herrera-Fontalvo, Z., Rúa-Muñoz, J., Ojeda-Gutiérrez, S., De Felice, F., & Petrillo, A. (2018). An integrated approach to evaluate the risk of adverse events in hospital sector. Management Decision, 56(10), 2187-2224. doi:10.1108/md-09-2017-0917Karnon, J., Stahl, J., Brennan, A., Caro, J. J., Mar, J., & Möller, J. (2012). Modeling using Discrete Event Simulation: A Report of the ISPOR-SMDM Modeling Good Research Practices Task Force-4. Value in Health, 15(6), 821-827. doi:10.1016/j.jval.2012.04.013Gillespie, J., McClean, S., Garg, L., Barton, M., Scotney, B., & Fullerton, K. (2016). A multi-phase DES modelling framework for patient-centred care. Journal of the Operational Research Society, 67(10), 1239-1249. doi:10.1057/jors.2015.114Becker, J. B., Lopes, M. C. B. T., Pinto, M. F., Campanharo, C. R. V., Barbosa, D. A., & Batista, R. E. A. (2015). Triage at the Emergency Department: association between triage levels and patient outcome. Revista da Escola de Enfermagem da USP, 49(5), 783-789. doi:10.1590/s0080-623420150000500011Kaushal, A., Zhao, Y., Peng, Q., Strome, T., Weldon, E., Zhang, M., & Chochinov, A. (2015). Evaluation of fast track strategies using agent-based simulation modeling to reduce waiting time in a hospital emergency department. Socio-Economic Planning Sciences, 50, 18-31. doi:10.1016/j.seps.2015.02.002Kuo, Y.-H., Rado, O., Lupia, B., Leung, J. M. Y., & Graham, C. A. (2014). Improving the efficiency of a hospital emergency department: a simulation study with indirectly imputed service-time distributions. Flexible Services and Manufacturing Journal, 28(1-2), 120-147. doi:10.1007/s10696-014-9198-7Ortíz-Barrios, M. A., & Alfaro-Saíz, J.-J. (2020). Methodological Approaches to Support Process Improvement in Emergency Departments: A Systematic Review. International Journal of Environmental Research and Public Health, 17(8), 2664. doi:10.3390/ijerph1708266

Methodological approaches to support process improvement in emergency departments: a systematic review

The most commonly used techniques for addressing each Emergency Department (ED) problem (overcrowding, prolonged waiting time, extended length of stay, excessive patient flow time, and high left-without-being-seen (LWBS) rates) were specified to provide healthcare managers and researchers with a useful framework for effectively solving these operational deficiencies. Finally, we identified the existing research tendencies and highlighted opportunities for future work. We implemented the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) methodology to undertake a review including scholarly articles published between April 1993 and October 2019. The selected papers were categorized considering the leading ED problems and publication year. Two hundred and three (203) papers distributed in 120 journals were found to meet the inclusion criteria. Furthermore, computer simulation and lean manufacturing were concluded to be the most prominent approaches for addressing the leading operational problems in EDs. In future interventions, ED administrators and researchers are widely advised to combine Operations Research (OR) methods, quality-based techniques, and data-driven approaches for upgrading the performance of EDs. On a different tack, more interventions are required for tackling overcrowding and high left-without-being-seen rate

The mOxy-CaL Process: Integration of Membrane Separation, Partial Oxy-combustion and Calcium Looping for CO2 Capture

CO2 capture and storage (CCS) is considered as a key strategy in the short to medium term to mitigate global warming. The Calcium-Looping process, based on the reversible carbonation/calcination of CaO particles, is a promising technology for post-combustion CO2 capture because of the low cost and non-toxicity of natural CaO precursors and the minor energy penalty on the power plant in comparison with amines capture based technologies (4-9 % compared to 8-12 %). Another interesting process to reduce CO2 emissions in power plants is oxy-combustion, which is based on replacing the air used for combustion by a highly concentrated (~95 % v/v) O2 stream. This work proposes a novel process (mOxy-CaL) for post-combustion CO2 capture based on the integration of membrane separation, partial oxy-combustion and the Calcium-Looping process. An oxygenenriched air stream, which is obtained from air separation by using highly permeable polymeric membranes, is used to carry out partial oxy-combustion. The flue gas exiting partial oxy-combustion shows a CO2 concentration of ~30 % v/v (higher than 15 % v/v typical in coal power plants). After that, the flue gas is passed to the CaL process where the CO2 reacts with CaO solids according to the carbonation reaction. Thermogravimetric analysis show that the multicycle CaO conversion is enhanced as the CO2 concentration in the flue gas stream is increased. Process simulations show that the mOxy-CaL process has a high CO2 capture efficiency (~95%) with lower energy consumption per kg of CO2 avoided than previously proposed post-combustion CO2 capture technologies. Moreover, the overall system size is significantly lower that state-of-the-art CaL systems, which allows for an important reduction in the capital cost of the technology

Spatial location patterns of Spanish manufacturing firms

In this paper, we evaluate the spatial location patterns of Spanish manufacturing firms in each industry. We use a distance-based method, Ripley’s K function, which allows us to treat space as continuous. With ‘complete spatial randomness’ as benchmark, every sector presents significant concentration whatever the distance considered. If we use the locations of all manufacturing firms as benchmark, we find dispersion in some sectors and concentration in others, finding also differences in the spatial scale at which clustering occurs. Finally, the use of cities as benchmark reveals that not only is ‘first nature’ among the location determinants of manufacturing firms but they also include the self-reinforcing advantages of ‘second nature’

El Huila, San Pedro, San Juanero, cultura y tradición

El documental EL HUILA, SAN PEDRO, SANJUANERO, CULTURA Y TRADICIÓN, es un producto audiovisual que mostrará la festividad más representativa del sur colombiano, que por medio de paisajes, desfiles, reinas y folclor promoverá a la población colombiana a visitar este departamento, porque cuando el Huila muestra su folclor, Colombia baila Sanjuanero.Comunicador (a) SocialPregrad

Domestic violence in the Ancient Egypt

Los relatos mitológicos, los textos literarios, los documentos legales y algunos estudios paleopatológicos demuestran que la violencia doméstica fue una constante de la vida en el Egipto antiguo. A pesar de que gozaba de igualdad legal con respecto al hombre y de que en los textos literarios siempre aparece como la generadora de la violencia doméstica, en realidad fue la mujer quien la sufrió con mayor asiduidad, como nos muestra la documentación existente.Mythological narratives, literary texts, legal documents, forensic testimonies and some paleopathological studies prove that gender violence was a constant in ancient Egyptian daily life. However, despite the fact that Egyptian women had legal equality with men and despite evidence in literary texts, where women always appears as the instigators of domestic gender violence, Egyptian women suffered that violence with more regularity than men, as proved by documentary evidence

Paradojas como recurso didáctico en la formación de profesores para enseñar probabilidad

Este trabajo presenta los datos empíricos iniciales, de un intento por llevar los avances teóricos logrados hasta el momento, sobre el fenómeno de reproducibilidad desde un enfoque socioepistemológico, al contexto de las prácticas preprofesionales de estudiantes que se están formando como profesores de matemáticas (EPM); con la intención de reconocer los factores que posibilitan el logro de los propósitos didácticos, entre ellos, las actuaciones de estos estudiantes como elementos de interacción social en calidad promotores de actividades de aprendizaje. Lo anterior apoyado en la reflexión guiada, que tiene doble función: sirve para que los practicantes tengan la oportunidad de establecer las relaciones necesarias entre la teoría y la práctica, y permite ir recogiendo su historia de práctica para el análisis epistemológico, cognitivo, didáctico y sociocultural, correspondiente