939 research outputs found

    Valoración del profesorado a un plan de intervención psicoeducativa en la educación de adultos

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    La Tesis Doctoral, tiene como objetivo conocer la valoración realizada por el profesorado de Centros de Educación de Adulto de la Comunidad Autónoma Canaria, acerca de la intervención desarrollada a través de cuatro programas instruccinales para el desarrollo y mejora de habilidades intelectivas relacionales y emancipatorias en las personas adultas que acuden a estos centros educativos. En el marco teórico estructurado en tres bloques, se hace un recorrido histórico de la Educación de Adultos, se indaga sobre las características psicoeducativas de la persona adulta, su aprendizaje y enseñanza, para terminar con aspectos relacionados con la intervención psicoeducativa con personas adultas. La muestra está formada por 58 profesores de 26 de los 32 centros de Educación de Personas Adultas de Canarias. El estudio empírico consta de dos investigaciones estructuradas en cuatro estudios a través de los que se obtienen los siguientes resultados: el profesorado valora de forma positiva los programas aplicados fundamentalmente por su claridad, estructuración, metodología y contenidos a los que consideran útiles para los agentes escolares al proporcionar mejoras tanto en las habilidades cognitivas como relacionales de los alumnos, así como en las competencias personales y profesionales de los docentes

    Análise Ontossemiótica de processos de instrução matemática - um exemplo no Ensino Básico

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    A descrição e a análise do tipo de conhecimento matemático presente num processo de estudo e das suas formas de exploração em aula constitui uma ferramenta indispensável a uma reflexão criteriosa sobre práticas educativas. Neste texto apresentamos resultados da aplicação do Modelo Ontossemiótico do Conhecimento e Instrução Matemática à análise de processos de instrução matemática. A partir de uma aula de Matemática do 1º Ciclo do Ensino Básico, propomo-nos exemplificar algumas das potencialidades oferecidas por este modelo à compreensão de processos instrucionais e, portanto, à melhoria tanto de processos de ensino dos professores como das aprendizagens dos alunos

    3D morphological features and antibiotic resistance in L. monocytogenes - Pseudomonas sp. biofilms

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    1 poster presented at Biofilms 7, Porto, 26-28 June 2016This research was financially supported by the Spanish Research Council (Project ref.201670 E008)N

    Validity of water industry wastes in cement industry

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    This paper examines the validity of several water industry wastes to be reused in different stages of cement production. The wastes considered are: a drinking water treatment plant sludge (DWTP), a sewage sludge (SS) and a spent activated carbon. Different procedures of drying of wastes using a novel dry spray system or subjected to thermal drying or stabilization and dried with lime are analysed. The spray drying process was successfully used with the DWTP sludge (but not with SS). The material was not found to be suitable as a supplementary material in blended cements. Despite this, the spray dried sludge did show good potential as partial or full substitute for clay as a raw material in cement clinker manufacture. A novel thermally drying process (Turbo-drying RINA-JET) was applied to produce dried sewage sludge. The dry sludge consisted of 56 % organic matter and has a high calorific value (8291 J / g), making it valid as an alternative fuel. The ash (35% of dry SS) contains Ca, Fe, P, Si and Al as main inorganic elements which are incorporated into the clinker phases. The burnability of the raw mixture containing this SS sludge was better than in the control raw mix. Furthermore, the paper describes an industrial process for stabilising sewage sludge (SS) with lime and evaluates the viability of the stabilised product, referred to as “Neutral”, as a raw material in the production of Portland cement clinker for the cement industry. The proposed process for sewage sludge treatment has a number of advantages over traditional treatments. In the Basic plant design, the chemical energy in the reagents generates sufficient thermal energy for the moisture to evaporate. This makes the process more energy-efficient than others. The validity of the “Neutral” product as a starting material in raw mixes for the production of cement clinker by substitution of limestone is demonstrated. Regarding the validity of spent activated carbon as an alternative to pet coke as fuel in Portland cement kilns, the carbon differed substantially from the coke, having lower calorific value (18 % less). However, the qualities of the spent coke were still sufficient for the intended use. The ash fraction of the spent activated carbon was mainly composed of anhydrite and quartz (SO3 = 14.1 %) and it is included into the clinker phases during the burning. The SO3 from the ashes promotes a very large growth in alite crystals in the clinker

    The Side Effect of Political Standing: Corporate Activism and Its Impact on Stock Returns

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    [EN]: Taking sides on controversial political issues such as gun control, abortion, immigration, or diversity is increasingly common among large companies. What remains unclear, however, is whether this type of strategy—known as “corporate activism”—has positive or negative effects on these companies. The use of the concept of corporate activism on different variables affecting the companies is relatively recent. This article analyses the effect of corporate activism on the stock market performance of US companies through the analysis of the sample collected. Although there are some recent articles published on this topic, none of them measures the risk associated with the use of this type of strategy. For the development of the research, the well‐known Fama–French modelling framework is applied to estimate the differences between companies that participate in corporate activism initiatives versus those that remain outside this strategy. The findings complement previous research showing that companies that use corporate activism have lower market risk than companies that do not engage in this type of strategy. These results can be useful in identifying the advantages and disadvantages of corporate activism initiatives and, in addition, they can also help companies to evaluate the use of corporate activism as a strategic tool and as a driver of social change.SIThis work has been partially supported by the Government of Madrid (Comunidad de Madrid, Spain) under the multiannual agreement with Universidad Complutense de Madrid, in the line Excellence Programme for University Teaching Staff, in the context of the V PRICIT (Regional Programme for Research and Technological Innovation)

    Assessment of tolerance development in L. monocytogenes – E. coli dual – species biofilms to Pronase and Benzalkonium chloride treatments

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    1 poster presented at VI International Conference on Environmental, Industrial and Applied Microbiology, Barcelona, 28-30 October 2015This research was financially supported by the Spanish Ministerio de Economía y Competitividad (ENZYMONO, AGL2010-22212-C02-02). P. Rodríguez-López acknowledges the financial support from the FPI-MICINN programme (Grant number: BES-2011-050544).N

    An assessment of the recent evolution of the streamflow in a near-natural system: a case study in the headwaters of the Mero basin (Galicia, Spain)

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    Producción CientíficaObservational trend analysis is fundamental for documenting changes in river flows and placing extreme events in their longer-term historical context. Observations from near-natural catchments, i.e., with little or no alteration by humans, are of great importance in detecting and attributing streamflow trends. The purpose of this study is to analyze the annual and seasonal trends of stream discharge (mean, low and high flows) in a headwater catchment in NW Spain, i.e., in the wettest corner of the Iberian Peninsula. The results showed no significant decrease in the mean annual stream discharge. However, significantly lower summer and autumn mean stream discharge and an increase in low flow period were detected, in addition to lesser autumn high flow. The rainfall pattern followed an upward trend, but was not significant. This different pattern shown by rainfall and discharge indicates that is not sufficient to explain the observed trend in stream discharge. Air temperature, most notably by enhancing evapotranspiration, may explain the altered patterns of stream discharge.Xunta de Galicia (Proyecto CGL2014-56907-R)Ministerio de Economía, Industria y Competitividad (Proyecto CGL2014-56907-R

    Aproximación ontosemiótica de prácticas de aula sobre la medida en educación primaria

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    En este trabajo se presenta un estudio exploratorio sobre prácticas de aula, relacionadas con las magnitudes longitud, tiempo y masa, llevadas a cabo en Educación Primaria en Portugal. El estudio fijó como objetivos determinar qué objetos y procesos matemáticos están implicados en esas prácticas y qué funciones ejecutan profesor y alumnos durante la realización de las mismas. Los resultados han evidenciado el predominio del conocimiento procedimental y algorítmico y el uso de situaciones extramatemáticas o de la vida cotidiana. El profesor es el gestor sistemático del trabajo de los alumnos así como de los tiempos, espacios y materiales disponibles en el aula

    Captura, transporte y almacenamiento del CO2 antropogénico (CCS) para la reducción de gases de efecto invernadero: efecto de las impurezas H2S y O2

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    La tecnología CCS (Carbon Capture and Storage) consiste en la captura, transporte (normalmente por tubería) e inyección y almacenamiento en reservorios geológicos (pozos de petróleo agotados, etc.) del CO2 producido en las actividades industriales. Es una de las opciones más importantes para reducir las emisiones de CO2 a la atmósfera y luchar contra el cambio climático: para 2050, está previsto almacenar más de 5 gigatoneladas por año a nivel global. El CO2 que se maneja no es CO2 puro, sino que contiene distintos tipos y cantidades de impurezas en función del proceso industrial del que procede y de los mecanismos de captura y purificación posterior. Las impurezas afectan de forma importante a las propiedades del fluido, propiedades que es necesario conocer para diseñar y operar las instalaciones CCS de forma idónea. Se utilizarán Ecuaciones de Estado (EoS) para calcular propiedades químico-físicas del CO2 puro y de un sistema CO2 + H2S + O2 con composición de interés para la tecnología CCS. Este cálculo se realizará en intervalos de presión y temperatura que incluyen los de las etapas de transporte, inyección y almacenamiento de la tecnología CCS (T = 263-373 K; p = 0,02-30 MPa).A partir de los valores obtenidos, se calcularán diferentes parámetros técnicos y se determinará cómo influye la presencia conjunta y por separado de O2 y H2S en las etapas de transporte, inyección y almacenamiento del proceso CCS: diseño del ceoducto (presión mínima de operación, caídas de presión y densidad y diámetro de tubería), proceso de inyección (flujo de permeación) y comportamiento del fluido en el reservorio de almacenamiento (capacidad de almacenamiento y velocidad ascensional de la pluma). No se han tenido en cuenta las diferencias de reactividad en el fluido por la presencia de las impurezas estudiadas.<br /

    Sea-level change and human occupation over 6000 years on Areoso Island (Ría de Arousa, NW Iberian Peninsula)

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    Coastal areas are extremely sensitive to variations in environmental conditions. The interaction of marine and continental processes causes a high degree of dynamism, generating depositional formations of great value for palaeoenvironmental reconstruction. This paper focuses on two pedostratigraphic deposits located under the current beach, in close proximity to archaeological tumuli located on Areoso Island (Ría de Arousa, NW Iberian Peninsula). Employing a geoarchaeological approach, sea-level rise, environmental conditions and human occupation over a 6000-year period are interpreted. The results of granulometric and mineralogical data, elemental composition and stratigraphic features, help to identify three successive environments: continental (rock weathering, soil formation and erosion); a transition to a coastal environment; and the establishment of full coastal conditions. The geomorphological evolution of the last 6.0 kyr BP has been controlled by climate, sea-level rise and human activity. The continental facies shows evidence of low sea-level up to 4.8 kyr BP and the first evidence of coastal processes after 3.2 kyr BP. These pedostratigraphic deposits located in an open coastal system improve the Holocene sea-level rise curve in the NW Iberian Peninsula and help to understand the context in which the most important archaeological structures on the island (the tumuli) began to be erodedOpen Access funding provided thanks to the CRUE-CSIC agreement with Springer NatureS
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