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This work introduces LibreDTE, an initiative providing software tools and support for electronic invoicing in Chile. LibreDTE is mainly built upon libredte-lib, a free software library that directly connects with the Chilean Internal Revenue Service, thus enabling automatic emissions of official e-invoices and other electronic tax documents. LibreDTE is either: (1) the first (and so far, the only one) Chilean framework for free-software-driven e-invoicing, and (2) an official software solution with featured e-business capabilities. In this paper, we describe both, the community (or free software) version, and the official (or commercial) version of LibreDTE. We focus on their primary building blocks and major technical differences, and we show, in a tutorial way, some of the key design considerations behind their common e-invoice generation. We also discuss some lessonslearned from earlier implementations, as well as the latest (and promising) features incorporated within the official version.This paper was partially supported by National Funds through FCT/MCTES (Portuguese Foundation for Science and Technology), within the CISTER Research Unit (UIDP/UIDB/04234/2020) and by FCT through the European Social Fund (ESF) and the Regional Operational Programme (ROP) Norte 2020, under grant 2020.06685.BDinfo:eu-repo/semantics/publishedVersio

Tablets y aplicaciones para la enseñanza del Inglés en Educación Primaria

Este Trabajo Fin de Grado tiene la intención de aportar información actualizada sobre la incorporación de las Tecnologías de la Información y la Comunicación a las aulas, con la utilización de las tabletas o tablets, pequeños ordenadores móviles y ligeros, táctiles y atractivos, a las que dedicaremos este trabajo. Intentaremos aportar luz sobre las posibilidades que ofrece el mercado, susceptibles de ser utilizadas durante la etapa de Primaria y aportar nuestro punto de vista sobre ventajas e inconvenientes que ofrecen las tablets en la clase de inglés. Somos conscientes del peligro que corremos en cuanto a lo reciente de estos recursos tecnológicos, la escasez de documentación histórica y la rapidez con que se suceden los acontecimientos en temas tecnológicos. Por ese motivo, aunque analicemos aplicaciones y recursos específicos, lo haremos intentando ver la universalidad de tales asuntos. Basado en una experiencia real, comentaremos una configuración concreta a nivel de hardware y software, consistente en un carro de tablets, mostrando que es sencillo y económico disponer de herramientas TIC en el aula de Primaria en la actualidad.Grado en Educación Primari

Seven challenges for RESTful transaction models

The REpresentational State Transfer (REST) architectural style describes the design principles that made the World Wide Web scalable and the same principles can be applied in enterprise context to do loosely coupled and scalable application integration. In recent years, RESTful services are gaining traction in the industry and are commonly used as a simpler alternative to SOAP Web Services. However, one of the main drawbacks of RESTful services is the lack of standard mechanisms to support advanced quality-ofservice requirements that are common to enterprises. Transaction processing is one of the essential features of enterprise information systems and several transaction models have been proposed in the past years to fulfill the gap of transaction processing in RESTful services. The goal of this paper is to analyze the state-of-the-art RESTful transaction models and identify the current challenges

A Linked Data Platform adapter for the Bugzilla issue tracker

The W3C Linked Data Platform (LDP) specification defines a standard HTTP-based protocol for read/write Linked Data and pro- vides the basis for application integration using Linked Data. This paper presents an LDP adapter for the Bugzilla issue tracker and demonstrates how to use the LDP protocol to expose a traditional application as a read/write Linked Data application. This approach provides a exible LDP adoption strategy with minimal changes to existing applications

morph-LDP: an R2RML-based Linked Data Platform implementation

The W3C Linked Data Platform (LDP) candidate recom- mendation defines a standard HTTP-based protocol for read/write Linked Data. The W3C R2RML recommendation defines a language to map re- lational databases (RDBs) and RDF. This paper presents morph-LDP, a novel system that combines these two W3C standardization initiatives to expose relational data as read/write Linked Data for LDP-aware ap- plications, whilst allowing legacy applications to continue using their relational databases

Desarrollo sostenible en las cuencas hidrográficas de los ríos Campoalegre, La Esmeralda y La Vieja, a partir del sistema de pagos por servicios ambientales : caso caficultura en Belén de Umbría

CD-T 333.72 A94; 171 pEl presente trabajo de investigación permite conocer sobre la relación entre el sistema de Pagos por Servicios Ambientales (PSA) con el cultivo de café presentes en el municipio de Belén de Umbría en Risaralda, cuyos desechos tienen influencia sobre la cuenca de La Esmeralda. Para ello se realizaron encuestas a caficultores de dicha región, donde se rigen pagos por servicios ambientales del banco Kreditanstalt für Wiederaufbau (KFW) a través de la Federación Nacional de Caficultores. Con lo anterior se identifica la medida de Pagos por Servicios Ambientales ha impulsado el Desarrollo Sostenible de la comunidad de Belén de Umbría. Debido a los problemas medioambientales que han surgido durante los últimos años en el mundo, del mismo modo surgen posibilidades para disminuir dichos daños, se da inicio a esta investigación permitiendo conocer la importancia del uso de incentivos como la asistencia técnica y el Pagos por Servicios Ambientales PSA como estrategia para hacer menos nociva la actividad cafetera en el municipio de Belén de Umbría.Universidad Libre Seccional Pereir

Polystyrene/sepiolites nanocomposite foams: Relationship between composition, particle dispersion, extensional rheology, and cellular structure

Producción CientíficaThe main objective of this work is to analyze how the cellular structure of foamed polystyrene based (PS) nanocomposites, produced by gas dissolution foaming, is affected by the extensional rheological behavior of the polymer matrix and by the dispersion degree of the particles. These composites have been produced with different types of natural and organomodified sepiolites and with different contents of these particles. The extensional behavior and the dispersion degree were characterized by extensional and shear dynamic rheology, respectively. The results obtained indicate that the extensional rheological behavior controls the foam degeneration mechanisms; meanwhile, the way in which the particles are dispersed in the PS matrix controls the nucleation mechanisms. Results also indicate that, in these systems, the characteristics of the cellular structure are mainly defined by the way in which nucleation occurs. Therefore, improving the dispersion degree is a key approach to reduce the cell size by 90%, with respect to the pure polymer.Junta de Castilla y León (project VA202P20)Ministerio de Ciencia, Innovación y Universidades (project RTI2018-098749-B-I00

Implementation of Computation Methodologies through Python Programming Language for Subjects Taught in the School of Naval Engineering of the UPM

[EN] The global target of this project is to improve the e ficiency of the students learning results by incorporating active learning methodologies such as the Python programming language which will improve theinterdisciplinarity and both horizontal and vertical academic coordination. We are also developing a complete repository, educational resources, and online videos in order to make the interaction and self-learning easier[ES] El objetivo de este proyecto es mejorar la eficiencia en los resultados de aprendizaje de los estudiantes, incorporando metodologías activas de aprendizaje como es la programación en el lenguaje Python. Este tipo de iniciativas se espera que favorezcan la interdisciplinariedad y la coordinación curricular de tipo horizontal y vertical. También buscamos desarrollar un repositorio de notebooks, recursos docentes, y videos online, que faciliten la experimentación así como el aprendizaje autónomoGonzález Gutiérrez, LM.; Cercós Pita, JL.; Esteban Burgos, D. (2016). Implantación de metodologías de cálculo a través del lenguaje Python para asignaturas impartidas en las titulaciones de la ETSIN. Modelling in Science Education and Learning. 9(1):151-160. doi:10.4995/msel.2016.4597.SWORD1511609

Synergistic enhancement of electrochemiluminescence through hybridization of α-Ge nanolayers and gold nanoparticles for highly sensitive detection of tyramine

This work presents a novel approach for detecting biogenic amine tyramine using a sensitive and disposable electrochemiluminescent sensor. The sensor is fabricated by modifying a screen-printed carbon electrode surface with two nanomaterials, α-Ge nanolayers and AuNP, which synergistically enhance the electrochemiluminescence response. The sensor was characterized using various techniques such as SEM-EDX, EIS, Raman, and AFM. The principle of the biosensor relays on the fact that tyramine molecule acts as an analyte and co-reactant, which interacts with the luminophore [Ru(bpy)3] 2+ on the sensor surface. The proposed sensor shows a linear response to tyramine concentration, with a detection limit of 2.28 µM. The sensor successfully detected tyramine in avocado samples, demonstrating its potential for practical applicationsThis work has been supported the Comunidad Autonoma ´ de Madrid (2021-5A/BIO-20943 Talent Attraction Project, SI3/PJI/2021-00341 and S2018/NMT-4349 TRANSNANOAVANSENS-CM Program) and by the Spanish Ministerio de Ciencia e Innovacion ´ (PID2020-116728RBI00, PDC2021-120782-C21, PID2019-106268GB-C32 and TED2021- 129738B-I00). This work has also been supported by the Spanish MINECO (PID2019-106268GB-C32, CEX2018-000805-M and PDC2021- 120782-C21). We acknowledge the support from the “(MAD2D-CM)- UAM” project funded by Comunidad de Madrid, by the Recovery, Transformation and Resilience Plan, and by NextGenerationEU from the European Unio

Sensopíldora chicles Orbit : uso de sensores para promover prácticas científicas de indagación con modelos

Presentamos una secuencia de actividades para la formación permanente de docentes sobre el uso de sensores en el aula con la reflexión sobre cómo usarlos para promover prácticas científicas de indagación basada en modelos. La secuencia elegida utiliza los ácido-base como contexto, en concreto la variación del pH de la boca al masticar chicles Orbit. Esta secuencia diseñada para estudiantes de 16 años, ha sido vivenciada por docentes en activo en varios cursos de formación docente del proyecto Sensociencia destacándose la facilidad de los docentes para plantear nuevos contextos y sus dificultades para utilizar modelos que sean explicativos o predictivos con su alumnado