Experiencia en el desarrollo de asignaturas de ingeniería en inglés enmarcadas en el Espacio Europeo de Educación Superior (EEES)

Con la llegada de los grados en ingeniería enmarcados dentro de los plan de educación superior (EEES), se pretende aumentadar de forma notable la oferta de asignaturas en lengua inglesa, hasta alcanzar al menos un 30% de las asignaturas ofertadas. Sin embargo, importantes retos emergen con este cambio educativo por parte de las universidades, tales como la formación del profesorado en dicho idioma y el estimular a los estudiante para asumir ese esfuerzo adicional, todo ello considerando el nivel de lenguas extranjeras existente en nuestro país. En este sentido, varias estrategias han de ser planteadas para abordar dicho reto, entre las que se encuentran el potenciar la utilización de medios audiovisuales en el aula, valorar el grado en el que se van a impartir las clases presenciales en dicho idioma, la realización de trabajos, lecturas con terminología específica en el campo de la ingeniería, etc. En la Universidad Politécnica de Cartagena hemos estado involucrados en el desarrollo de nuevas técnicas metodológicas mediante el trabajo cooperativo de diferentes profesores, para evaluar el grado de respuesta y motivación por parte de los estudiantes al convivir en el aula con el inglés, hasta ahora un desconocido por buena parte del alumnado más allá de las asignaturas obligatorias en su periodo de formación en secundaria. En este sentido, en la presente comunicación presentaremos algunos de los resultados obtenidos en los trabajo preliminares llevados a cabo en este proceso de inserción de una lengua extranjera en el aula .Campus Mare Nostrum, Universidad Politécnica de Cartagena, Universidad de Murcia, Región de Murci

Optimal integration modeling of Co–Electrolysis in a power-to-liquid industrial process

High temperature co-electrolysis using solid-oxide electrolysis cells is a highly efficient pathway for green syngas production owing to the possibility of heat integration with other processes. Therefore, this study described and evaluates a flexible and efficient configuration for producing sustainable synthetic fuels using electricity from renewables and captured CO2 by integrating co-electrolysis in a power-to-liquid industrial plant. Thereafter, novel and efficient technologies were implemented for green syngas production and its subsequent purification, increasing the overall process efficiency and achieving a significant reduction in the carbon footprint compared to mature synthetic crude production processes. Catalytic partial oxidation and dual pressure swing adsorption were integrated with co-electrolysis and Fischer–Tropsch synthesis in a scaled industrial plant, using residual streams from the complex or those of renewable origin as feed, which allowed the continuous operation of the process independent of renewable power generation. The mass and energy balance, performance, and efficiency estimations were also included in this study. A solid-oxide electrolytic cell (SOEC) plant using renewable electricity and heat input from thermal integration with the outlet syngas stream of the catalytic partial oxidation reactor was selected as a case study. Both the performance and efficiency analyses of the co-electrolysis unit demonstrated the benefits of such thermal integration in comparison with current solutions. In this study, both the thermal integration of the process streams, as well as the energy and heat consumed by the syngas purification process were considered.The authors acknowledge the project funded by the Comunidad Autónoma de la Región de Murcia, Consejería de Desarrollo Económico, Turismo y Empleo (Región de Murcia, Spain), and the European Union through the program RIS3MUR (Ref:2I20SAE00079)

Estudio por dinámica molecular de la localización de la benzocaína dentro de una membrana celular

El mecanismo por el cual las moléculas con propiedades anestésicas interactúan con la membrana celular permanece aún bajo discusión. En este sentido, se ha realizado un estudio, mediante dinámica molecular con el objetivo de determinar la variación de la energía libre de una molécula anestésica (benzocaína) tras su paso a través de un modelo de membrana biológica. Con tal fin, se ha considerado un modelo de bicapa lipídicaformado por DPPC con DPPS, donde el DPPS ha sido distribuido asimétricamente entre ambas capas de la bicapa lipídica. A partir del perfil de energía libre obtenido, ha sido posible determinar que la benzocaína, se localiza principalmente en la región de la cadena carbonada de los fosfolípidos, o en una zona más cercana al final de la región de las cabezas lipídicas en el interior de la membrana, en función de la presencia o no de DPPS.Asociación de Jóvenes Investigadores de Cartagena, (AJICT). Universidad Politécnica de Cartagena. Escuela Técnica Superior de Ingeniería Industrial UPCT, (ETSII). Escuela Técnica Superior de Ingeniería Agronómica, (ETSIA), Escuela Técnica Superior de Ingeniería de Telecomunicación (ETSIT). Escuela de Ingeniería de Caminos, Canales, y Puertos y de Ingeniería de Minas, (EICM). Fundación Séneca, Agencia Regional de Ciencia y Tecnología. Parque Tecnológico de Fuente Álamo. Grupo Aquilin

Production of gas diffusion layers with cotton fibers for their use in fuel cells

The gas diffusion layer (GDL) is one of the most important parts of a proton exchange membrane fuel cell, that plays a key role transporting the current to the collector plates, distributing the reactant gases to the catalyst surface, and evacuating heat and water that is generated during the redox reactions inside the fuel cell. Speaking in terms of production cost, the GDL represents up to 45% of the total cost of the membrane electrode assembling (MEA). However, and despite its crucial role in a fuel cell, until recent years, the GDLs have not been studied with the same intensity as other MEA components, such as the catalyst or the proton exchange membrane. In this work, we present the production process, at laboratory scale, of a low cost GDL, using a non-woven paper-making process. A relevant aspect of this GDL is that up to 40% of their composition is natural cotton, despite which they present good electrical and thermal conductivity, high porosity, good pore morphology, high hydrophobicity as well as gas permeability. Furthermore, when the GDL with its optimum cotton content was tested in a single open cathode fuel cell, a good performance was obtained, which makes this GDL a promising candidate for its use in fuel cells.The authors acknowledge the foresight to the Universidad Politécnica de Cartagena for providing a new laboratory for hydrogen research. AJN thanks the Universidad Politécnica de Cartagena for awarding a grant of Iniciación a la Investigación financed by the Santander Bank. AJN and MAG are actually working on this project with a contract funded by the Comunidad Autónoma de la Región de Murcia, Consejeria de Desarrollo Económico, Turismo y Empleo, and the European Union, through the program RIS3MUR with Ref: 2I20SAE00079. Authors wish to thank to Prof. Dr. José Antonio Mompean González of the Department of English of the University of Murcia, for the revision of this manuscript

An Energetic Model for Detonation of Granulated Solid Propellants

Unexpected detonation of granular solid energetic materials is a key safety issue in the propellants manufacturing industry. In this work, a model developed for the characterization of the early stages of the detonation process of granular solid energetic materials is presented. The model relies on a two-phase approach which considers the conservation equations of mass, momentum, and energy and constitutive relations for mass generation, gas-solid particle interaction, interphase heat transfer, and particle-particle stress. The work considers an extension of approximated Riemann solvers and Total Variation Diminishing (TVD) schemes to the solid phase for the numerical integration of the problem. The results obtained with this model show a good agreement with data available in the literature and confirm the potential of the numerical schemes applied to this type of model. The results also permit to assess the effectiveness of different numerical schemes to predict the early stages of this transient combustion process.The research was performed thanks to the financial support of the Spanish Ministry of Economy and Competitiveness and the European Regional Development Fund throughout project RTC-2016-5194-8

Evaluation of physichochemical parameters influencing bulking episodes in a municipal wastewater treatment plant

A study of physicochemical parameters in a municipal wastewater treatment plant was undertaken to consider the presence of bulking phenomena by means of statistical and logistic regression analyses. There appears to be an important effect on activated sludge settleability that can be related to the temperature of wastewater. Besides, there were significant differences between the percentage of nitrogen removal from the secondary treatment with the season. The SVI increased with conductivity, meanwhile BOD5 removal decreased with this parameter. The development of logistic regression models identified two statistically significant variables that appeared to be important to the contribution of a higher SVI: season and pH

Electrodes based on nafion and epoxy-graphene composites for improving the performance and durability of open cathode fuel cells, prepared by electrospray deposition

Fabrication of electrodes for polymer electrolyte fuel cells is a intriguing process in which a balance between gas transport, electrical conductivity, proton transport and water managing must be optimized. In this work four different electrodes prepared by electrospray deposition have been studied using different catalytic inks, in which Nafion and epoxy doped with Graphene-Nanoplatelets were used as binders. After studying the behavior of those electrodes in a single open cathode fuel cell proton electrolyte membrane, it is clear that the addition of epoxy as binder doped with graphene, improves the performance of the fuel cell and increase the mechanical stability of the electrode avoiding the loose of catalyst during the electrode manipulation in the fuel cell assembly process and the durability of the fuel cell. To explain this behavior, an ex-situ study was carried out, in which properties such as its surface morphology, hydrophobicity and electrical and thermal conductivity of those electrodes were studied. From the results of this study, such improvement in the performance of the fuel cell was justified on the basis of the increase in the electrical conductivity, a diminution in its thermal conductivity and an enhancement of hydrophobicity (surface morphology) of the deposited catalyst layer, when an optimum quantity of epoxy is added to the catalytic ink that makes to improve the mechanical properties of those electrodesAJN and MAG are actually working on this project with a contract funded by the Comunidad Atonoma de la Región de Murcia, Conserjería de Desarrollo Económico, Turismo y Empleo, and the European Union, through the program RIS3- MUR, grant number 2I20SAE00079. This work has also been funded by the Spanish Ministry of Science and Innovation (AEI, Spain,PID2020-112744GB-I00/AEI/10.13039/501100011033 and RTI2018-095844-B-I00), Fundacion Seneca (Región de Murcia, Spain), grant number: 20985/PI/18 and Agencia estatal española de Investigación, grant number PID2019-104272RBC55/AEI/10.13039/501100011033. The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper

体育学科学习和信息通信技术的通用设计：干预方案的设计和验证

This work is proposed with the objective of designing and validating an intervention program for the Physical Education area applying Information and Communication Technologies and Universal Design for Learning, to favor the inclusion of students with intellectual functional diversity of fourth year of Primary Education, through an evaluative research design. For the validation of the program mentioned through expert judgment, an ad hoc instrument is designed. In the statistical treatment, the Kendall concordance index shows the existence of concordance between the evaluators, which allows to favorably validating the proposed intervention. The conclusions reflect on the need to design programs on this subject, which allow guaranteeing the participation of all students in educational processes.Este trabajo se plantea con el objetivo de diseñar y validar un programa de intervención para la asignatura de Educación Física, aplicando las Tecnologías de la Información y la Comunicación y el Diseño Universal para el Aprendizaje, para favorecer la inclusión de los alumnos con diversidad funcional intelectual de cuarto curso de Educación Primaria, a través de un diseño de investigación evaluativa. Para la validación de dicho programa a través del juicio de expertos, se construye un instrumento ad hoc. En el tratamiento estadístico, el índice de concordancia de Kendall, muestra la existencia de concordancia entre los evaluadores, lo cual permite validar favorablemente la propuesta de intervención planteada. Las conclusiones reflexionan sobre la necesidad de diseñar programas en esta temática, que permitan garantizar la participación de la totalidad del alumnado en los procesos educativos.Целью данной работы является разработка и проверка программы обучения по предмету «Физическая культура» с использованием информационно-коммуникационных технологий и универсального дизайна обучения для содействия включению учащихся с функциональным интеллектуальным разнообразием в четвертый год обучения в начальной школе с помощью оценочного метода исследования. Для валидации этой программы с помощью экспертной оценки был разработан специальный опросник. При статистической обработке индекс конкордации Кендалла показывает наличие согласованности между оценщиками, что позволяет положительно оценить предлагаемое вмешательство. Сделанные выводы свидетельствуют о необходимости разработки программ в этой области, гарантирующих участие всех студентов в образовательном процессе.本研究的目的是应用信息和通信技术以及通用学习设计，设计和验证一项体育学科的干预计划，通过评估性研究设计，促进对小学四年级具有智力功能多样性的学生的包容性。为了通过专家判断验证所述程序，我们设计了一个临时工具。在处理统计数据过程中，Kendall一致性指数显示评估者之间存在一致性，这使得所提出的干预措施得到了有利的验证。结论反映了设计该主题项目的必要性，以保证所有学生参与教育过程

Penetratin and Derivatives Acting as Antibacterial Agents

The synthesis, in vitro evaluation and conformational study of penetratin and structurally related derivatives acting as antibacterial agents are reported. Among the compounds evaluated here, two methionine sulphoxide derivatives (RQIKIWFQNRRM[O]KWKK-NH2 and RQIKIFFQNRRM[O]KFKK-NH2) exhibited the strongest antibacterial effect in this series. In order to better understand the antimicrobial activity obtained for these peptides, we performed an exhaustive conformational analysis using different approaches. Molecular dynamics simulations were performed using two different media (water and trifluoroethanol/water). The results of these theoretical calculations were corroborated using experimental CD measurements. The electronic study for these peptides was carried out using molecular electrostatic potentials obtained from RHF/6-31G(d) calculations. In addition, the non-apeptide RQIRRWWQR-NH2 showed strong inhibitory action against the Gram-negative and Gram-positive bacteria tested in this study

Modelado de problemas de combustión de propulsantes

[ESP] Se presenta una revisión del estado del arte en el que se identifican modelos bifásicos para analizar problemas que implican la combustión de propulsantes. En estos problemas coexisten una fase sólida, pólvora o propulsante, y una fase gaseosa que corresponde a los gases que resultan de la combustión de la primera. En este estudio se detallan aquellos modelos en los cuales el sistema de ecuaciones se completa con las ecuaciones de cierre necesarias para caracterizar físicamente el problema. [ENG] A review of the state-of-the-art two-phase models for solid propellants combustion is presented. A solid phase, solid propellant, and a gas phase, as a result of propellant combustion, coexist in these problems. In this study the models detailed are those in which the governing equations system is completed by the necessary constitutive relations to solve the problem.Escuela Técnica Superior de Ingeniería de Telecomunicación (ETSIT), Escuela Técnica Superior de Ingeniería Agronómica (ETSIA), Escuela Técnica Superior de Ingeniería Industrial (ETSII), Escuela Técnica Superior de Arquitectura y Edificación (ETSAE), Escuela Técnica Superior de Ingeniería de Caminos, Canales y Puertos y de Ingeniería de Minas (ETSICCPIM), Facultad de Ciencias de la Empresa (FCCE), Parque Tecnológico de Fuente Álamo (PTFA), Vicerrectorado de Estudiantes y Extensión de la UPCT, Vicerrectorado de Investigación e Innovación de la UPCT, y Vicerrectorado de Internacionalización y Cooperación al Desarrollo de la UPCT