A game-based approach to the teaching of object-oriented programming languages

Students often have difficulties when trying to understand the concepts of object-oriented programming (OOP). This paper presents a contribution to the teaching of OOP languages through a game-oriented approach based on the interaction with tangible user interfaces (TUIs). The use of a specific type of commercial distributed TUI (Sifteo cubes), in which several small physical devices have sensing, wireless communication and user-directed output capabilities, is applied to the teaching of the C# programming language, since the operation of these devices can be controlled by user programs written in C#. For our experiment, we selected a sample of students with a sufficient knowledge about procedural programming, which was divided into two groups: The first one had a standard introductory C# course, whereas the second one had an experimental C# course that included, in addition to the contents of the previous one, two demonstration programs that illustrated some OOP basic concepts using the TUI features. Finally, both groups completed two tests: a multiple-choice exam for evaluating the acquisition of basic OOP concepts and a C# programming exercise. The analysis of the results from the tests indicates that the group of students that attended the course including the TUI demos showed a higher interest level (i.e. they felt more motivated) during the course exposition than the one that attended the standard introductory C# course. Furthermore, the students from the experimental group achieved an overall better mark. Therefore, we can conclude that the technological contribution of Sifteo cubes – used as a distributed TUI by which OOP basic concepts are represented in a tangible and a visible way – to the teaching of the C# language has a positive influence on the learning of this language and such basic concepts

El gobierno de Sancho : (estudio filosófico-crítico)

Precede al tít.: III centenario de la aparición del QuijoteCopia digital. Valladolid : Junta de Castilla y León. Consejería de Cultura y Turismo, 2009-201

Desenvolvemento do modelo analítico para a avaliación dos KPI dunha software factory

[Resumo] Nos últimos anos, a implementación de Business Intelligence pasou de ser un ‘luxo’ de organizacións que podían permitirse destinar partidas de presupostos para tal efecto, a convertirse nunha necesidade en grandes e medianas empresas debido ao gran volume de datos que é preciso estruturar e analizar. A principal motivación para a realización do presente Traballo de Fin de Grao é a necesidade de obter información de maneira visual e dende calquera dispositivo sobre todos os proxectos que se están a desenvolver na organización. Para a visualización, os usuarios empregan a ferramenta de Microsoft Power BI. Os datos, previamente foron integrados nun modelo tabular creado en Analisys Services cuxa orixe é a ferramenta de xestión de proxectos na nube Azure Devops. Para a obtención dunha parte dos datos foi preciso crear un servizo implementado en C# que obtén periódicamente os datos mediante API Rest de Azure Devops e os almacena nun ficheiro plano. O resto dos datos foi obtido directamente dende SSAS co protocolo oData.[Abstract] Over the last few years, the companies conception about Business Intelligence has changed a lot. From being an extra section, financed with leftover budget, to be something completely necessary, in part, because the big amount of data who need to be managed. Considering this, companies have need for obtaining the data from all internally developed projects, and they need them structured, and accessible from any device; that’s the main motivation of this Bachelor’s Degree Dissertation. In order to visualize this information, the employees use the tool Microsoft Power BI. The way followed to make these data available is divided into the next two steps. In a first step, data are obtained from the tool Azure Devops for project management and, in a second step, it is integrated in a tabular model that is created in Analisys Services. It was necessary to create a service to obtain part of the data periodically, which, finally, are stored in a plain file. This service, developed in C#, uses an Azure Devops Rest API. The remaining data were obtained from SSAS, using oData protocol.Traballo fin de grao (UDC.FIC). Enxeñaría informática. Curso 2018/201

Effects of commercial enrichment diets on the nutritional value of the rotifer (Brachionus plicatilis)

12 páginas, 4 tablasThe rotifer, Brachionusplicatifis, pre-fed on baker’s yeast, was enriched for 6 h with three commercial products from Artemia Systems S.A., namely Protein Selco (microcapsules), Dry Selco (microparticles) and Super Selco (an emulsion containing high levels of n-3 HUFA). The biochemical composition (protein, carbohydrate, total lipid, lipid classes and fatty acids) and dry weight ofthe rotifers before and after the enrichment experiments were studied. Two of the enrichers, Dry Selco and Super Selco, are rich in lipid but poor in protein and carbohydrate. Protein Selco contains lipid as well as protein and carbohydrate. The biochemical composition and the dry weight of the rotifers were changed after 6 h of enrichment. The percentage of protein and lipid increased with all of the three enrichers and the percentage of carbohydrate decreased slightly. Rotifer dry weight increased in rotifers enriched on Protein Selco. Phospholipids, sterol esters+ waxes, triacylglycerols and free fatty acids increased after the enrichment with the three enrichers while sterols slightly decreased when the rotifers were fed on Protein Selco. The fatty acid content of the rotifers increased after the enrichment with all ofthe enrichers and this increase was particularly apparent in the case of n-3 HUFAs (20: Sn-3 and 22 : 6n-3).This work was supported by the contract-project “ Larval Nutrition of Turbot” with the fish farm Cultivo de Peces S.A. (CULTIPECSA).Peer reviewe

Auditoría energética de un edificio docente

[Resumen]: Se realiza un informe de auditoría energética del edificio Campus Puerta de Toledo perteneciente a la Universidad Carlos III de Madrid. Primero se presenta una descripción del centro, seguido del análisis de sus consumos energéticos, en el cual se estudian las facturas de electricidad, agua y gas, además de hacer un balance energético. Posteriormente, se describen todas las instalaciones de consumo energético existentes en el centro. En función de dichas instalaciones, se comienzan a proponer las medidas de ahorro energético, en las que se describe el comportamiento de la mejora respecto al sistema actual, y los beneficios económicos y energéticos. Por otro lado, se presentan unas medidas de ahorro recomendadas, que se diferencian de las anteriores en que su beneficio no es tan importante. Estas medidas tratan de la sustitución de la iluminación, la optimización de facturas o el control de consumo eléctrico, entre otros. Finalmente, se establece una tabla con el resumen de las medidas más importantes, la conclusión del presente informe y se agregan los inventarios y catálogos, usados para el cálculo de las mejoras, como anexos.[Resumo]: Realízase un informe de auditoría enerxética do edificio Campus Puerta de Toledo pertencente á Universidade Carlos III de Madrid. Primeiro preséntase unha descrición do centro, seguido da análise dos seus consumos enerxéticos, no cal estúdanse as facturas de electricidade, auga e gas, ademais de facer un balance enerxético. Posteriormente, descríbense todas as instalacións de consumo enerxético existentes no centro. En función de ditas instalacións, comézanse a propoñer as medidas de aforro enerxético, nas que se describe o comportamento da mellora respecto ó sistema actual, e os beneficios económicos e enerxéticos. Por outro lado, preséntanse unhas medidas de aforro recomendadas, que se diferencian das anteriores en que o seu beneficio non é tan importante. Estas medidas tratan da substitución da iluminación, a optimización de facturas ou o control do consumo eléctrico, entre outros. Finalmente, establécese unha táboa co resumen das medidas máis importantes, a conclusión do presente informe e agréganse os inventarios e catálogos, usados para o cálculo das melloras, como anexos.[Abstract]: An energetic audit report is made of the Campus Puerta de Toledo building belonging to the Carlos III University of Madrid. First, there is a description of the centre, followed by the analysis of its energy consumption, in which electricity, water and gas bills are studied, as well as an energy balance is done. Subsequently, all the systems of energy consumption existent in the centre are described. Based on these systems, energy saving measures are proposed, which describe the performance of the improvement over the current system, and the economic and energy benefits. On the other hand, recommended savings measures are presented, which differ from the previous ones in that their benefit is not so important. These measures deal with the replacement of lighting, the optimization of bills or the control of electricity consumption, among others. Finally, a table with the summary of the most important measures is established, the conclusion of the present report and the inventories and catalogues, used for the calculation of the improvements, as annexes.Traballo fin de mestrado (UDC.EPS). Enxeñaría industrial. Curso 2016/201

Heterogeneous catalytic ozonation of aniline-contaminated waters: A three-phase modelling approach using TiO2/GAC

This work aims to study the sustainable catalytic ozonation of aniline promoted by granular active carbon (GAC) doped with TiO2. Aniline was selected as a model compound for the Accelerator manufacturing industries used in the manufacture of rubber due to its environmental impact, low biodegradability, and harmful genotoxic effects on human health. Based on the evolution of total organic carbon (TOC), aniline concentration measured using high performance liquid chromatography (HPLC), pH and ozone concentration in liquid and gas phase, and catalyst loading, a three-phase reaction system has been modelled. The proposed three-phase model related the ozone transfer parameters and the pseudo-first order kinetic constants through three coefficients that involve the adsorption process, oxidation in the liquid, and the solid catalyst. The interpretation of the kinetic constants of the process allowed the predominance of the mechanism of Langmuir–Hinshelwood or modified Eley–Rideal to be elucidated. Seven intermediate aromatic reaction products, representative of the direct action of ozone and the radical pathway, were identified and quantified, as well as precursors of the appearance of turbidity, with which two possible routes of degradation of aniline being proposed.The authors are grateful to the University of the Basque Country for their financial support of this study through the PPGA19/63 project and C. Ferreiro’s predoctoral PIF grant (PIF16/367)

Esquemas numéricos bidimensionales de alto orden para resolución numérica del sistema de aguas someras con transporte inerte de un contaminante

En este trabajo se aplican esquemas numéricos bidimensionales de alto orden (ver [5] A.M. Ferreiro Ferreiro. Desarrollo de técnicas de post-proceso de flujos hidrodinámicos, modelización de problemas de transporte de sedimentos y simulación numérica mediante técnicas de volúmenes finitos. Tesis Doctoral. Universidad de Sevilla. 2006) empleando el método de volúmenes finitos, para la modelización del transporte inerte de una sustancia en un fluido, como por ejemplo, el vertido de contaminantes. El modelo matemático consiste en un sistema acoplado de aguas someras y una ecuación que modela de transporte inerte de una sustancia. Dicho acoplamiento introduce un nuevo campo linealmente degenerado en el sistema. Además, si el vertido ocupa sólo una porción de fluido, la frontera del mismo se propaga como una discontinuidad de contacto (ver [11] E. F. Toro. Shock-capturing methods for free-surface shallow flows. Wiley, 2001). En consecuencia, para aproximar con precisión la evolución de un vertido es necesario desarrollar métodos numéricos que capturen adecuadamente las discontinuidades de contacto. En este trabajo presentamos un método de volúmenes finitos de alto orden bidimensional basado en técnicas de reconstrucciones de estados. Concretamente hemos empleado una técnica de tipo MUSCL discontinua que garantiza orden 2. Finalmente, se presentan algunos tests numéricos

Extraction of Anthocyanins and Total Phenolic Compounds from Açai (Euterpe oleracea Mart.) Using an Experimental Design Methodology. Part 3: Microwave-Assisted Extraction

In this work, two methods based on microwave-assisted extraction techniques for the extraction of both anthocyanins and total phenolic compounds from acai have been developed. For that, a full factorial design (Box-Behnken design) has been used to optimize the following four variables: solvent composition (25-75% methanol in water), temperature (50-100 degrees C), pH (2-7), and sample/solvent ratio (0.5 g: 10 mL-0.5 g: 20 mL). The anthocyanins and total phenolic compounds content have been determined by ultra high-pressure liquid chromatography and Folin-Ciocalteu method, respectively. The optimum conditions for the extraction of anthocyanins were 38% MeOH in water, 99.63 degrees C, pH 3.00, at 0.5 g: 10 mL of ratio, while for the extraction of total phenolic compounds they were 74.16% MeOH in water, 99.14 degrees C, pH 5.46, at 0.5 g: 20 mL of ratio. Both methods have shown a high repeatability and intermediate precision with a relative standard deviation lower than 5%. Furthermore, an extraction kinetics study was carried out using extraction periods ranging from 2 min until 25 min. The optimized methods have been applied to acai-containing real samples. The results with such real samples have confirmed that both methods are suitable for a rapid and reliable extraction of anthocyanins and total phenolic compounds

Extraction of anthocyanins and total phenolic compounds from açai (euterpe oleracea mart.) using an experimental design methodology. part 1: Pressurized liquid extraction

Currently, açai is one of the most important fruits present in the world. Several studies have demonstrated its high content in phenolic compounds and anthocyanins. Both of them are responsible of interesting properties of the fruit such as anti-inflammatory, antioxidant or anticancer. In the present study, two optimized pressurized liquid extraction (PLE) methods have been developed for the extraction of anthocyanins and total phenolic compounds from açai. A full factorial design (Box-Behnken design) with six variables (solvent composition (25%-75% methanol-in-water), temperature (50-100°C), pressure (100-200 atm), purge time (30-90 s), pH (2-7) and flushing (50%-150%)) were employed. The percentage of methanol in the extraction solvent was proven to be the most significant variable for the extraction of anthocyanins. In the case of total phenolic compounds, the extraction temperature was the most influential variable. The developed methods showed high precision, with relative standard deviations (RSD) of less than 5%. The applicability of the methods was successfully evaluated in real samples. In conclusion, two rapid and reliable PLE extraction methods to be used for laboratories and industries to determine anthocyanins and total phenolic compounds in açai and its derived products were developed in this work

Machine learning approaches over ion mobility spectra for the discrimination of ignitable liquids residues from interfering substrates

In arson fires, ignitable liquids (ILs) are frequently used to start combustion. For this reason, detecting IL residues (ILRs) at the fire scene is a key factor in fire investigation to determine whether a crime has been committed as well as to establish the modus operandi of the perpetrator. In the present study, the application of headspace-gas chromatography-ion mobility spectrometry (HS-GC-IMS) for the detection of ILRs in fire debris from complex matrices in combination with machine learning (ML) tools is proposed as an alternative to the traditional method, based on gas chromatography–mass spectrometry (GC-MS), described by the ASTM E1618 standard method. For this purpose, petroleum-derived substrates (vinyl, nylon, and polyester) and natural substrates (cotton, cork and linoleum) burned alone and with different ILs (gasoline, diesel, ethanol and charcoal starter with kerosene) were used. In addition, samples were taken at different times (0, 1, 6, 12, 24 and 48 h) after the fire was finished. The ion mobility sum spectrum (IMSS) of each sample was obtained and different ML algorithms were applied. The first derivative was performed at the IMSS, as well as a Savitzky-Golay filter. Hierarchical cluster analysis (HCA) revealed a clustering trend as a function of substrate and ILs used, where the studied sampling times did not affect the resulting clusters. The classification models for the detection of the presence of ILRs have high performance with an accuracy of 100% for support vector machines (SVM) and random forest model (RF), followed by linear discriminant analysis (LDA) with an accuracy of 86.67%. When discriminating the type of ILs used, the RF model obtained an accuracy of 100%, followed by the LDA with 97.22% and finally the SVM model with an accuracy of 93.06%. In addition, a simple web application has been developed where the trained models can be used, so any researcher can apply the method to detect ILRs in fire debris