Energy efficiency and integration of urban electrical transport systems: EVS and metro-trains of two real European lines

Transport is a main source of pollutants in cities, where air quality is a major concern. New transport technologies, such as electric vehicles, and public transport modalities, such as urban railways, have arisen as solutions to this important problem. One of the main difficulties for the adoption of electric vehicles by consumers is the scarcity of a suitable charging infrastructure. The use of the railway power supplies to charge electric vehicle batteries could facilitate the deployment of charging infrastructure in cities. It would reduce the cost because of the use of an existing installation. Furthermore, electric vehicles can use braking energy from trains that was previously wasted in rheostats. This paper presents the results of a collaboration between research teams from University of Rome Sapienza and Comillas Pontifical University. In this work, two real European cases are studied: an Italian metro line and a Spanish metro line. The energy performance of these metro lines and their capacity to charge electric vehicles have been studied by means of detailed simulation tools. Their results have shown that the use of regenerated energy is 98% for short interval of trains in both cases. However, the use of regenerated energy decreases as the train intervals grow. In a daily operation, an important amount of regenerated energy is wasted in the Italian and Spanish case. Using this energy, a significant number of electric vehicles could be charged every day

SIVIM – das Online-Datenbank-System zur Vegetation der iberischen Halbinsel und der Makaronesischen Inseln

SIVIM (Sistema de Información de la Vegetación Ibérica y Macaronésica) is an information system designed for capturing, hosting, editing, analyzing and outputting georeferenced plot data of Iberian and Macaronesian vegetation. It currently hosts 86,000 relevés, mainly from the northern half of the Iberian Peninsula and the Balearic Islands, and will grow to 100,000 relevés in the near future. SIVIM has been conceived to offer direct and free on-line access to relevés, tables, as well as to floristic, syntaxonomical and bibliographical records. The system also offers on-line software for edition and analysis of vegetation data. The main characteristics of SIVIM are presented, and its particular technical solutions to typical data banking problems as well as its future objectives are briefly commented.SIVIM ist ein Informationssystem, mit welchem georeferenzierte Daten zur iberischen und makaronesischen Vegetation erfasst, gehostet, editiert, analysiert und ausgegeben werden können. Momentan umfasst das System 86.000 Aufnahmen. In naher Zukunft soll die Anzahl der Aufnahmen auf 100.000 steigen, hauptsächlich durch Daten aus dem Norden der Iberischen Halbinsel und von den Balearen. SIVIM wurde initiiert, um einen direkten, freien Online-Zugang zu Vegetationsaufnahmen, Vegetationstabellen, sowie zu floristischen, syntaxonomischen und bibliographischen Daten anzubieten. Außerdem bietet es Online-Software, um Vegetationsdaten zu editieren und zu analysieren. Dieser Beitrag gibt eine Übersicht über die wesentlichen Eigenschaften von SIVIM und erläutert die implementierten technischen Lösungen typischer Datenbankprobleme sowie die zukünftigen Ziele

Use of water soluble extracts from ulva sp. by probiotics and fish bacterial pathogens

BACKGROUNDS The potential of seaweeds as dietary components is considered for a wide range of cultured fish species. In this context, Ulva is investigated as a good source of protein, minerals and vitamins. In addition, of probiotics are used to improve fish growth and modulate immune system and intestinal microbiota. To promote probiotics colonization and maintenance in the intestine, prebiotics are included in fish diets. Prebiotics are indigestible substrates used as energy sources for gastrointestinal microbiota, with a positive effect on the nutrition and health status of the host. In the present work, ability of selected probiotic and fish pathogen strains to use water soluble extracts from Ulva as nutrient source has been evaluated. MATERIALS AND METHODS Water-soluble extracts from Ulva sp. prepared by sonication of dehydrated samples were used to supplement minimum medium (M9). Probiotics and pathogens growth was evaluated based on the optical densities measured with a microplate reader. RESULTS AND CONCLUSIONS Probiotics were able to grow in minimum medium using water soluble extracts as nutrient source. On the other hand, P. damselae subsp. piscicida and V. harveyistrains were also able to grow with Ulvaextracts as nutrient source. However, incubation time to reach maximum growth was longer. Although Ulva extract may support growth of both probiotics and pathogen bacteria, faster growth of probiotics may help for the establishment of probiotic populations in the intestinal environment. In addition, beneficial effects on growth performance, gut microbiota, immunity and disease resistance of Ulva for Solea senegalensisare being studied. This work was funded by INIA, Ministerio de Economía y Competitividad and FEDER (RTA201400023 C0202).This work was funded by INIA, Ministerio de Economía y Competitividad and FEDER (RTA201400023 C0202).Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Conhecimento pedagógico do conteúdo de uma professora de química do ensino médio sobre Lei de Hess

O intuito do presente trabalho foi o de investigar o Conhecimento Pedagógico do Conteúdo (PCK, da sigla em inglês) de uma professora de química quando esta desenvolveu o tópico Lei de Hess em uma turma de 2º ano do Ensino Médio de uma escola da rede pública. Nossos dados foram baseados no registro audiovisual das aulas e no preenchimento da ferramenta CoRe - Representação de Conteúdo. Os registros foram transcritos e, juntamente com as respostas do CoRe, efetuou-se a análise de conteúdo, agrupando-se as ideias centrais em categorias a partir do modelo de PCK proposto por Rollnick et al. (2008). Os resultados indicam que a professora, possui um PCK deficiente, sobretudo no domínio «conhecimento de conteúdo específico»

INSIDE US

[ES] Estudio de las formas y ras gos faciales, a través, del dibujo y la línea sensible. A través de las calidades gráficas que nos permite n obtener las herramientas tradicionales. Se llevarán a cabo una serie de retratos, en los que se podrán observar las variantes morfológicas de cada u no de los distintos rostros. Se pretende representar, la gestualidad - o los gestos - y los movimientos faciales que permiten expresar y sacar a la luz sentimientos y sensaciones, sin necesidad de comunicarlos verbalmente . Estas leves expresiones del rostro se reflejan inconscientemente permitiendo los más remotos y sinceros pensamientos de cada individuo[EN] Study of facial forms and features thought s cience of drawing an d sensitive line. Adapting traditional graphic qualities which allows us useless drawing material. To run this project, we should make a serial portrait where we will see a rigorous morphological analysis of our faces. It expects to portray ourself face - l anguage and typical movements which we have unconsciously, when we try to show our feelings or sensations, without oral skills. By means of this gestuality and gestures, adapted in our society and life - style, anyone can be reflected. Their secretest and tr ustest thinkings can be showed with naturality.Fernández Barber, MDC. (2016). INSIDE US. http://hdl.handle.net/10251/75068.TFG

Electrochemical impedance spectroscropy study on the behavior of reinforced concrete elements under loading

Concrete is a material of porous nature that, when humidified, becomes an ionic conductor whose apparent conductivity depends on the ionic load (typically based on OH−, Ca2+, Na+, and K+) and the amount of available free water. Under conditions of partial pore-saturation, the amount of free water can be modulated by an external load, which leads to observable changes in electrical properties such as conductivity and capacitance. Moreover, metallic reinforcements, either as bars or fibers, represent an additional parallel conduction path but of an electronic nature in this case. The free water develops a double-layer capacitance structure at the metallic interfaces, with associated charge-transfer resistance, representing an additional contribution to the capacitive behavior that can be modulated with an external load. The dependence that the electrical and/or ionic conducting properties of concrete and reinforced concrete elements have on the available free water makes them suitable for transductors in various sensing and self-sensing applications discussed in the text.Xunta de Galicia | Ref. ED431B2021/1

Simulation of a biorefinery process as learning tool in chemical engineering degree

Currently, the search for alternative biomass to be used as renewable sources for energy production is one of the most important challenges to achieve a sustainable growth based on a bioeconomy strategy (Mendes et al., 2009). In this context, lignocellulosic waste are a renewable, clean, inexpensive and with high availability for the manufacture of biofuels. In this sense, the main objective of this study was the simulation and design of engineering processes that allows the valorization of lignocellulosic waste and the obtaining of biofuels as alternative to fossil fuels. This goal implies the practical application of the theoretical knowledge acquired by the student during the chemical engineering degree. Specifically, the students designed and simulated a biorefinery process that consisted of a Kraft pulping process as starting point of two main lines of production: (1) Process I: production of bioethanol and (2) Process II: direct and indirect production of dimethylether (DME), both from lignocellulosic biomass (Fig.1). Two commercial simulation packages, ASPEN HYSYS® and UNISIM were used to simulate the production of dimethylether and bioethanol, respectively. The first step was determining a strategic situation for the installation of the biorefinery. The central area of Andalusia (between the municipalities of Lucena and Antequera) was considered the most adequate area to develop the installation of the biorefinery plant after evaluating the biomass available inside of 100 kms of distance around this place. Specifically, different biomass mixtures were considered in order to ensure the viability of a constant inlet flow of biomass in the biorefinery. In function of this inlet flow of biomass, the installations were designed and dimensioned in each stage of the process. The student carried out a wide revision of state of the art to decide the most adequate processes among different alternatives to obtain dimethylether and bioethanol. The different stages selected as the most adequate in each line of the process can be observed in Fig.1. Moreover, the students evaluated the different alternatives for the valorisation and optimization of the by-products generated in each stage of the process in order to minimize the consuming of chemical compounds and energy requirements. Therefore, the students learnt to develop a real engineering process more sustainable and friendly with the environment. To sum up, the used of programs to simulate the transformation of lignocellulosic biomass in biofuels, such as, bioethanol or dimethylether, which is a process with several social, environmental and economic advantages, was an interesting learning tool for students of chemical engineering degree. Keywords Bioethanol, design, dimethylether, Kraft pulping process, simulations. References Mendes, C.V.T., Carvalho, M.G.V.S., Baptista, C.M.S.G., Rocha, J.M.S., Soares, B.I.G., Sousa, G.D.A., 2009. Valorisation of hardwood hemicelluloses in the kraft pulping process by using an integrated biorefinery concept. Food Bioproduct Process 87:197–207.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech MINECO: Proyecto CTQ2015-68654-

Lactancia materna: Prevención de problemas tempranos en las mamas mediante una técnica de amamantamiento eficaz

Introduction: Currently, most mothers know the importance of breastfeeding for both the mother and the child from the nutritional point of view and emotional development as well as prevention and pathologies, but some mothers know that inadequate breastfeeding technique can cause early problems in the breasts and thus, in many cases, the early abandonment of lactation. Objective: In this study the main puerperal breast abnormalities that may be associated with ineffective breastfeeding technique, due to insufficient maternal education about it are set out. Method: We performed a literature research in the following databases: Medline, Pubmed and the Cochrane Database of Systematic Reviews. Works related to the objective of this text are included. Results: Consulted studies evaluated the association between the onset of breast problems and the use of inappropriate lactation technique and the efficacy of treatments after the onset of the lesions. Conclusions: The association between the occurrences of early problems in the breast associated with breastfeeding technique is evident. We conclude that prevention is the best treatment, where important work develops a healthcare professional.Introducción:Actualmente la mayoría de las madres conocen la importancia de la lactancia materna tanto para la madre como para el hijo desde el punto de vista nutritivo y de desarrollo así como afectivo y de prevención de patologías; pero algunas madres desconocen que una técnica de lactancia inadecuada puede llegar a ocasionar problemas tempranos en las mamas y con ello, en numerosas ocasiones, el abandono temprano del amamantamiento. Objetivos:En este estudio se plantean las principales alteraciones mamarias puerperales que pueden estar asociadas a una técnica de lactancia ineficaz.Metodología: Se ha realizado una búsqueda bibliográfica en las siguientes bases de datos: Medline, Pubmed y The Cochrane Database of Systematic Reviews. Se incluyen los trabajos relacionados con el objetivo del presente texto. Resultados: Los estudios consultados evalúan la asociación entre la aparición de problemas mamarios y la utilización de una técnica de lactancia inadecuada y la eficacia de los tratamientos tras la aparición de las lesiones. Conclusiones:La asociación entre la aparición de problemas tempranos en las mamas asociados a una técnica de lactancia materna inadecuada es evidente. Se concluye que la prevención es el mejor tratamiento, lugar donde desarrolla una importante labor el profesional sanitario

Academic performance of immigrant students and teachers’ expectations

El presente trabajo de investigación se centra en conocer si el pensamiento del docente es un pensamiento profético, es decir, si esas actitudes y acciones docentes penetran en el alumnado y condicionan su desempeño académico. Para ello se analizan las creencias de 167 docentes de Educación Infantil, Educación Primaria y Educación Secundaria de la provincia de Córdoba (España). Se utilizó un cuestionario para conocer la relación entre el alumnado inmigrante y su posible influjo en el logro académico. Los hallazgos evidencian, en primer lugar, la escasa confianza del profesorado en el alumnado no autóctono, fenómeno que es en gran medida inconsciente; en segundo lugar, resultados escolares más bajos en este alumnado con relación al autóctono; y, finalmente, un estilo atribucional externo en los docentes, para quienes las familias y los recursos organizativos de la institución escolar, no ellos, son los factores determinantes del logro escolar.This paper focuses on whether teachers’ thinking is prophetic, that is, whether these attitudes and actions permeate the students and condition their academic performance. To this end, we analyzed the beliefs of 167 teachers of Early Childhood, Elementary and High School Education in the province of Córdoba (Spain). A questionnaire was used to know the relationship between teachers’ beliefs about immigrant students and their possible influence on academic achievements. In the first place, the findings show the teachers’ lack of confidence in non-native students, a phenomenon that is largely unconscious; in the second place, lower school results in these students in relation to natives; and, finally, an external attributional style in teachers, for whom the families and the organizational resources of the school institution, not them, are the determining factors of school achievement.O eixo da presente pesquisa é investigar se o pensamento dos professores é um pensamento profético, ou seja, se suas atitudes e ações penetram nos alunos e condicionam o seu desempenho acadêmico. Para este fim, são analisadas as crenças de 167 professores de Educação Infantil, Educação Básica e Ensino Médio da província de Córdoba (Espanha). Foi utilizado um questionário para saber a relação entre os alunos imigrantes e sua possível influência no desempenho acadêmico. Os resultados mostram, em primeiro lugar, a baixa confiança dos professores nos alunos não nativos, fenômeno em grande parte inconsciente; em segundo lugar, registra-se um desempenho acadêmico mais baixo neste corpo discente em relação aos autóctones e, finalmente, um estilo de atribuição externo aos professores, para os quais as famílias e os recursos organizacionais da instituição escolar, e não eles, são os fatores determinantes do desempenho acadêmico