Caracterització de Caves mitjançant cromatografia de líquids

Treballs Finals de Grau de Química, Facultat de Química, Universitat de Barcelona, Any: 2018, Tutor: Xavier Saurina PurroyCava is an exceptional kind of sparkling wine with a protected designation of origin (PDO) status from Spain. This beverage is made by the Champanoise method, which requires a secondary fermentation in the bottle. Polyphenols are one of the principal components of Cava. These substances not only are responsible for some of the unique properties of Cava but, also, can be used as chemical descriptors to discriminate among samples of different varieties and compositions. In the present project, 10 types of Cavas from different varieties of grapes were characterized according to their polyphenolic profile, which was obtained by high performance liquid chromatography with UV-visible detection at different wavelengths (250, 280, 310, 370 nm). A total of 18 polyphenols were studied. Two different approaches (chromatograms and integrated peak areas, also referred to as fingerprinting and profiling approaches, respectively) were used to build principal component analysis (PCA) models focused on the differentiation among the samples. Both models presented an excellent discriminant ability. Besides, with the profiling model the most characteristic polyphenolic compounds of each kind of Cava were identified. Finally, the chromatograms registered at 310 nm were used to build partial least squares discriminant analysis (PLS-DA) models which allowed the classification of the Cava samples according to their type, and “unknown” samples belonging to a new test set were correctly assigned to their corresponding classe

Medición de signos vitales mediante técnicas de visión artificial

En esta tesis, se presenta el desarrollo de un sistema de medición de signos vitales, mediante la aplicación de técnicas de visión artificial. Para lo cual, se detalla una revisión sistemática sobre la supervisión de signos vitales. Se analizan los aspectos y conceptos relevantes para la medición de signos vitales a través de técnicas de visión artificial. Además, se identifica los puntos débiles que existen en los sistemas de medición actuales basados en técnicas de visión artificial. En función de esto, se desarrollan mejoras y posibles soluciones para optimizar las mediciones. Finalmente, se detalla un sistema que permite medir mediante técnicas de visión artificial y sin contacto: la frecuencia cardíaca, la frecuencia respiratoria, la saturación de oxígeno y la temperatura corporal. El mismo, es evaluado frente a sistemas clásicos de medición y a sistemas existentes de medición que funcionan por imagen fotopletismografía. Finalmente, se implementa el sistema dentro del framework conocido como ROS, lo que le permite funcionar en robots.In this thesis, we describe the development of a vital sign measurement system through the application of artificial vision techniques. As a first step, a systematic review of the vital signs supervision is detailed. The relevant aspects and concepts for the measurement of vital signs through artificial vision techniques are analyzed as well. In addition, the weak points of current measurement systems based on techniques of artificial vision are identified. Based on these, we developed some solutions and improvements to optimize the measurements. Finally, the thesis presents the description of the proposed system that allows to measure by means of techniques of computer vision and without contact: the heart rate, the respiratory rate, the saturation of oxygen and the corporal temperature. This system is evaluated against classical measurement systems and existing measuring systems that work by photoplethysmography. Finally, the system is implemented within the framework known as ROS which allows it to work in robots.Programa Oficial de Doctorado en Ingeniería Eléctrica, Electrónica y AutomáticaPresidente: José María Sebastián y Zúñiga.- Secretario: Fares Jawad Abu-Dakka.- Vocal: Pedro Guerra Lópe

Traction Modeling and Control of a Differential Drive Mobile Robot to Avoid Wheel Slip

The motion of a differential drive mobile robot with consideration of slip at contact between the wheels and the ground is studied in this work. Traction forces between the wheel and the ground are derived by considering a rigid wheel, rigid ground interaction model and a caster wheel which provides support to the mobile robot during motion. The motion governing equations are determined by incorporating the traction forces. Numerical simulations are conducted to learn the motion behavior of the robot with wheel slip for a range of wheel input torques. Based on the traction force model and observations from numerical simulations, a slip avoidance controller that limits the input torques is developed. Experiments are conducted to verify the characteristics of the dynamic model with slip and the control strategy used to avoid slip. Models that describe the dynamics of a differential drive mobile robot with and without slip are presented and discussed. A traction force model is developed by considering a simple Coulomb friction model. The caster wheel plays an important role in determining the traction forces. The longitudinal and lateral velocities of the wheel are used to compute the longitudinal and lateral forces. Wheel slip occurs if the reaction force exerted by the applied torque is greater than the static frictional force, which is calculated by the proposed model and this limit is used to implement a slip avoidance controller. Numerical simulations and experiments of the system using the proposed traction model reveal that the angular velocity of the wheels is greater than the corresponding linear velocity when slip occurs. The proposed torque limiting controller to avoid slip is also implemented in numerical simulations and experiments. Experimental results show a good correlation with the numerical simulations, thus verifying the approach and the developed dynamic model with wheel slip.Mechanical Engineerin

Diseño de metodologías ágiles, Lean y Kanban para el mejoramiento y optimización de procesos de la empresa Vestimentum Diseño y Moda

Este trabajo propone una mejora en el diseño y optimización de procesos mediante la aplicación de herramientas de Lean Manufacturing para la empresa Vestimentum Diseño y moda. La empresa Vestimentum diseño y moda se dedica a la fabricación y comercialización de prendas de vestir. La propuesta pretende cumplir con los plazos de entrega de los pedidos a los clientes, la estandarización de tiempos de ejecución, la reducción de riesgos, la eliminación de reprocesos y la reducción de inventarios. El estudio se divide en etapas. Se lleva a cabo el levantamiento de procesos de Vestimentum con el fin de conocer la situación actual, y se concluye que al ser una pequeña empresa aplican muchos conceptos de Lean Manufacturing pero los mismos no se encuentran estandarizados. Finalmente, se diseñó una propuesta amigable, clara y concisa sobre una aplicación de las herramientas, donde se estandarizan sus procesos y principios con el objetivo de mejorar como empresa y eliminar desperdicios dentro del proceso productivo. Para este trabajo de diseño de metodologías ágiles, lean y kanban para el mejoramiento y optimización de procesos de la empresa Vestimentum diseño y moda se separó en diferentes etapas que ayudaron a desarrollar la factibilidad del mismo. 1. Marco teórico, introducción a la filosofía Lean Manufacturing, definiciones, estructura, principios y sus herramientas. 2. Análisis situacional, interno y externo de la industria, aspectos relevantes de la organización. 3. Levantamiento de información de la organización, cadena de valor, mapa de procesos y flujogramas de las áreas que intervienen en el proceso productivo, a fin de entender el estado actual de la empresa frente al conjunto de herramientas que propone Lean Manufacturing. 4. Diseño de propuesta de mejora con la aplicación de Lean Manufacturing para la solución de problemas diagnosticados, selección de las herramientas, diseño de aplicación y ventajas. 5. Conclusiones y recomendaciones

Composición de ácidos grasos de la carne de capones de raza Mos y estirpes comerciales sacrificados a diferentes edades

Se ha estudiado la influencia de la raza [Mos (raza española autóctona), Sasso T-44 y X-44 (estirpes comerciales)] y la edad (5, 6, 7 y 8 meses) de los capones (gallos castrados) en la composición de ácidos grasos de la carne de la pechuga y del muslo. La carne de los capones de raza Mos presentó menor concentración de ácidos grasos monoinsaturados y mayor de poliinsaturados que la carne de las otras razas. Además, dichos capones mostraron mayor contenido de los ácidos margárico (C17:0) y esteárico (C18:0) que las estirpes comerciales; sin embargo, no hubo diferencias significativas entre las distintas razas en el total de ácidos grasos saturados. La carne de los animales más jóvenes mostró menor concentración de ácidos grasos monoinsaturados y mayor de poliinsaturados que la de los animales de mayor edad. Sin embargo, la edad influyó menos que la razaThe influence of the breed [Mos (Spanish indigenous breed), Sasso T-44 and X-44 (commercial strains)] and the age (5, 6, 7 and 8 months) of capons (castrated male cockerels) on the fatty acid compositions of breast and drumstick meat were studied. The meat of the Mos capons showed lower contents of monounsaturated fatty acids and higher concentrations of polyunsaturated fatty acids than those of the other breeds. In addition, the Mos breed showed higher contents of margaric acid (C17:0) and stearic acid (C18:0) as compared to the commercial strains; however, no significant effects of breed were observed in the total contents of saturated fatty acids in the meat. The meat of the youngest animals showed lower contents of monounsaturated fatty acids and higher concentrations of polyunsaturated fatty acids than that of the older ones. Nevertheless, the effect of age was less important than the effect of breedThis study was financially supported by project PGIDIT04RAG012E [Consellería de Innovación, Industria e Comercio da Xunta de Galicia and Asociación de Criadores de Capón de Vilalba]S

Composition and Physico-Chemical Properties of Meat from Capons Fed Cereals

Chemical composition, physico-chemical properties and fatty acid composition of breast and drumstick meat from capons (castrated male cockerels) fed cereals were studied. Three groups of capons were reared. One group was fed ad libitum the same commercial diet until the 4th mon of life. The last month of its life, the capons of this group were fed corn. The second and third group of capons were fed the same diet from caponization. The second group was fed mixture of corn (50%) and wheat (50%). The third group of capons was fed 2/3 corn and 1/3 mixture of corn (50%) and barley (50%). Capons were reared under free-range conditions and slaughtered at 150 d of age. Caponization was performed at 48 d. No significant effects of feeding in chemical composition, pH, water holding capacity, drip and cooking losses and texture of the meat were observed. The meat of the third group (capons fed 83% corn) was more yellow and showed higher content of C18:2 than that of the other caponsThis study was financially supported by project PGIDIT04RAG012E (Consellería de Innovación, Industria e Comercio da Xunta de Galicia and Asociación de Criadores de Capón de Vilalba, Spain)S

Developing a socially-aware robot assistant for delivery tasks

This is a post-peer-review, pre-copyedit version of an article published in Applied Technologies. The final authenticated version is available online at: http://dx.doi.org/10.1007/978-3-030-42520-3_42This paper discusses about elements to be considered for developing a Service Robot that performs its task in a social environment. Due to the social focus of the service, not only technical considerations are demanded in order to accomplish with the task, but also the acceptance of use for the people, who interact with all of them. As our particular research topic, we establish a taxonomy to determine the framework for the development of socially-aware robot assistants for serving tasks such as deliveries. This is a general approach to be considered for any service robot being implemented in a social context. This article presents several previous cases of the implementation of service mobile robots, their analysis and the motivation of how to solve their acceptance and use by people. Therefore, under this approach it is very important not to generate false expectations about the capabilities of the robot, because as it is explained in the state of the art analysis that very high unsatisfied expectations lead to leaving the robot unused....Peer ReviewedPostprint (published version

The role of Internet in the development of future software projects

Purpose – The Internet has evolved, prompted in part by new Web 2.0 technologies, to become a more widespread platform for interaction, communication, and activism. Virtual communities, or groups of people informally bound together by shared expertise, synthesise this Internet evolution and theWeb 2.0 technology. Users increasingly want to engage online with one another and with organisations of all kinds. These novel Internet-based technologies dominate the new business models of the digital economy giving companies radical new ways to harvest the talents of innovators working outside corporate boundaries. One of the most illustrative examples of this new trend is the Open Source Software (OSS) projects development. This paper aims to analyse the structure and topology of the virtual community supporting one of the most successfully OSS projects, Linux. The objective is to provide conclusions for being successful in the development of future virtual communities. As companies learn to manage these virtual communities, they will develop smarter and faster ways to create value through them. Design/methodology/approach – The interactions of the virtual community members of an ARM-embedded Linux project website is analysed through social network analysis techniques. The participants’ activity is studied and some conclusions about the participation features are obtained using the Gini coefficient. In particular, a participation inequality behaviour or a concentration on a small number of developers is clearly observed. Findings – The paper deals with the guidelines that virtual communities should follow to be successful. Results about the structure of a successful virtual community and its time evolution are provided to determine the mentioned guidelines. Research limitations/implications – The research is limited to a particular virtual community engaged with the development of the ARM-embedded Linux OSS. Other successful virtual communities can be analysed, and the conclusions could be compared. Anyway, the proposed analysis methodology can be extended to other virtual communities. Originality/value – The paper fulfils the development and features of Internet virtual communities to be successful. Results have important implications over the development of new software business models based on virtual communities and open source software. Contributions about the best organisation of virtual communities leading to a successful development of the underlying project are presented.Ministerio de Educación y Ciencia DPI2007- 60128Junta de Andalucía. Consejería de Innovación, Ciencia y Empresa P07-TIC-0262

An empirical study of the driving forces behind online communities

Purpose – A large variety of online communities have emerged during the last years as a result of the challenges faced by both the business and scientific worlds. This trend has also been promoted by the development of internet and new Web 2.0 technologies. In this context, this paper is focused on the determinants of success of online communities. But, as a difference from other studies, these determinants are analyzed from the social network analysis perspective. Several constructs related to the community organization as a social network are proposed and their interrelations are hypothesized in a general research framework. The obtained results test the proposed model providing the most relevant antecedents of the project success. Design/methodology/approach – A case study based on Linux ports to non-conventional processor and environments is used to test the proposed model. Structural equation modeling analysis is used to validate the structural proposed model. Findings – The main antecedents of online communities’ success, quantifying the strength of the relation through the standardized path coefficients. Research limitations/implications – The research is limited to a particular set of online communities engaged with the development of the non-conventional Linux ports. However, they constitute a representative set of communities in the field of the open source projects (OSS) development, which are typically developed using a community of support. Originality/value – This paper fulfils the main antecedents causing the successful development of Internet virtual communities. Instead of using sources of data coming from users’ surveys, this study employs community interactions as a source of data. Results have important implications over the development of online communities, like software business models based on virtual communities and open source softwareMinisterio de Educación y Ciencia DPI2007-60128Junta de Andalucía. Consejería de Innovación, Ciencia y Empresa P07-TIC-0262