Concepto y comparativa de las "Lean Learning Factories" del Mundo

El objetivo de este proyecto es conocer el concepto “Factorías de Aprendizaje Lean” y realizar una comparativa de las diferentes escuelas que existen en el mundo. Para ello, el proyecto se divide en un primera parte donde se describe la metodología de “aprender haciendo” mediante aportaciones teóricas, seguido de la historia y antecedentes que dieron origen al concepto “Factoría de Aprendizaje”. Posteriormente, una ilustración del panorama actual y varios ejemplos de fábricas de formación, junto a una descripción de la filosofía Lean con sus técnicas y herramientas necesarias, da lugar al concepto que conocemos de “Factorías de Aprendizaje Lean”. La principal finalidad de este trabajo es sentar las bases para una futura línea de investigación, en la que pueda conocerse mejor el panorama actual y evolucione hacia otros enfoques.Departamento de Organización de Empresas y Comercialización e Investigación de MercadosMáster en Logístic

Vibrational and thermal characterization of seeds, pulp, leaves and seed oil of Rosa rubiginosa

Rosa rubiginosa L. seed oil has been studied for its application in skin care products, but the chemical nature of seeds, pulp and even leaves, apart from that of oil, is also relevant with a view to the application of this weed for biodiesel production. All these vegetal materials were studied by infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC) for characterisation purposes. FTIR bands at 3005, 2924, 1740, 1654 and 1456 cm-1 were used to estimate the iodine index, suitable for biofuels, and the oxidation stability degree. From the viewpoint of the thermal stability, both the seed oil (for which pyrolysis occurs at 462°C), the raw seeds and the rosehip pulp (with decomposition temperatures of 373°C and 333°C, respectively) showed potential as a biomass feedstock for conversion into biofuels. Caracterización térmica y vibracional de las semillas, pulpa, hojas y aceite de semillas de Rosa rubiginosa. El aceite de semillas de R. rubiginosa L. ha sido estudiado para su aplicación en productos para el cuidado de la piel, pero la naturaleza química de las semillas, pulpa y hojas, además de la del aceite, también es importante con miras a la aplicación de esta mala hierba para la producción de biodiesel. Los materiales vegetales mencionados se han estudiado mediante espectroscopía infrarroja (FTIR) y calorimetría diferencial de barrido (DSC) con fines de caracterización. Las bandas del espectro infrarrojo en 3005, 2924, 1740, 1654 y 1456 cm-1 han sido utilizadas para estimar el índice de yodo, adecuado para los biocombustibles, y el grado de estabilidad a la oxidación. Desde el punto de vista de la estabilidad térmica, tanto el aceite de semillas (para el que la pirólisis se produce a 462ºC) como las semillas crudas y la pulpa (con temperaturas de descomposición de 373°C y 333°C, respectivamente) mostraron potencial como materia prima de biomasa para su conversión en biocombustibles

Effect of Dried Pig Manure Fertilization on Barley Macronutrients and Sodium in a Nitrate Vulnerable Zone

Dried pig manure (DPM) may be valorized as a fertilizer suitable for barley crop in nitrate vulnerable zones (NVZs). The aim of this study was determine the macronutrients and sodium contents in barley (Hordeum vulgare L.) resulting from its application in a NVZ in Fompedraza (Valladolid, Spain). DPM was applied at three rates (85, 133, and 170 kg N ha-1 year-1); the mineral fertilizer with a nitrification inhibitor was applied at two rates (90 and 108 kg N ha-1 year-1), and these were compared with the control treatment (without fertilization) in a randomized complete block design. Nutrients were monitored in four different plant growth stages and in grain over a 3-year period. DMP-based fertilization increased P and Na contents in plant and decreased those of Ca and Mg. These changes were only translated into a P increase in grain. The Na content in plant should not affect the final crop yield, making this waste management strategy viable even in NVZs. However, N content in plant in tillering and stem elongation stages was lower for DPM-based fertilization than for mineral fertilization, and so was the C content, both in plant and in grain. Since N content is a limiting factor for crop development, supplementary mineral fertilization would be advised to compensate for N immobilization if this organic waste material is to be valorized as a fertilizer

Portable X-ray Fluorescence analysis of Levantine and Schematic art pigments from the River Vero Shelters (Huesca, NE Spain)

The River Vero canyon (Huesca, Spain) contains an exceptional archaeological legacy with more than sixty rock shelters with cave paintings and forms part of the World Heritage ‘Rock Art of the Mediterranean Basin on the Iberian Peninsula’. This study presents the results of the in situ and non-destructive multi-elemental composition analysis of the pigments used in eight of the main shelters through portable X-ray fluorescence spectroscopy (pXRF). Specifically, the cave paintings of the rock shelters of Chimiachas, Muriecho, and Arpán (Levantine Art); and Mallata, Barfaluy, Quizans, Lecina Superior, and Forau del Cocho (Schematic Art) were investigated. The red pigments, based on iron minerals, were the most abundant in all the River Vero rock shelters, with Fe contents in the 0.51–3.06% range. The iron contents of the paintings of Mallata B1 and I, Muriecho, and Forau del Cocho were higher than those of Arpán, Barfaluy, Lecina, and Chimiachas rock-shelters; and, in turn, these were higher than those of Quizans, pointing to noticeable differences in the degree of conservation. Black pigments, in the absence of manganese, were associated with bone char or carbon black. Through the phosphorus content, evidence is provided of the use of bone phosphates as a component of the paints, either as a filler or as a binder. Geological studies indicate that the detected gypsum is of external origin, probably associated with gypsum-rich atmospheric dust. The reported pXRF analysis of this large set of paintings may serve as a basis for future characterization studies involving other portable chemical analysis techniques

Una investigación del efecto moderador del sexo

Las tecnologías de la información y la comunicación (TIC) así como el aprendizaje basado en Internet han adquirido en los últimos años una importancia creciente en el campo de la educación superior, ofreciendo nuevas ventajas competitivas que confluyen en mejores resultados (Kekkonen-Moneta y Moneta, 2002). Con más centros de educación asumiendo los retos de la enseñanza a distancia por los profesores así como el uso de las TIC en el aprendizaje por los estudiantes en sus diferentes niveles educativos, debemos considerar las implicaciones del diseño e implantación de las mismas desde una perspectiva basada en las diferencias individuales (Acker y Oakley, 1993; Bryson y de Castell, 1999; Durndell y Lightbody, 1993; Gargallo et al., 2006; Shashaani, 1993; Tejedor-Tejedor y García-Valcárcel, 2006; Whitley, 1997). No obstante, si bien los diversos estudios publicados evidencian que las difrencias individuales, concretamente el sexo, desempeñan un papel esencial en cómo son aceptadas y usadas las TIC, la importancia del sexo del usuario en el Modelo de Aceptación de la Tecnología (TAM; Technology Acceptance Model) modelo ampliamente utilizado sobre el comportamiento del usuario en Internet es un objetivo reciente de investigación; de hecho, cuando se presenta el modelo TAM a mediados de los años ochenta (Davis, 1986, 1989), no se mencionan las diferencias entre varones y mujeres, y es escasa también la aportación bibliográfica que analiza la influencia del sexo en la aceptación y uso de las TIC por el profesorado. Como Gefen y Straub (1997) denuncian en su trabajo, el sexo ha sido tradicionalmente evitado por la investigación centrada en la aceptación y uso de las TIC pese a que podría ayudar a explicar cómo los varones y las mujeres las aceptan y usan (Venkatesh y Morris, 2000). Por ejemplo, se afirma que cada sexo emplea la tecnología de modo diferente; por ejemplo, la investigación muestra que los varones usan Internet y, concretamente, la Web para buscar información (Gefen y Straub, 1997); mientras que las mujeres hacen un mayor uso de la Web para comunicarse (Jackson etal., 2001; Van Slambrouch, 2000; Wilson, 2000)

Synthesis and exploration of the lubricating behavior of nanoparticulated Mo15S19 in linseed oil

Producción CientíficaMolybdenum chalcogenides present interesting properties beyond their superconducting critical temperatures and upper critical magnetic fields, making them suitable for potential applications in tribology, batteries, catalysis, or thermopower. In this study, Mo15S19 nanoparticles with an average diameter of 10 nm were synthesized via the reaction of ammonium molybdate with hydrochloric acid and elemental sulfur as reducers at 245 °C. The oxidation to MoO3 in air was efficiently avoided by using linseed oil as a reaction medium and dispersant. Scanning electron microscopy (SEM) micrographs of the as-prepared samples revealed the presence of few-micron-size aggregates, while transmission electron microscopy (TEM) characterization evidenced that the samples were polynanocrystalline with a high degree of homogeneity in size (standard deviation of 2.7 nm). The absence of the first-order (00l) reflection in the X-ray diffraction pattern was also indicative of the absence of Mo3S4 stacking, suggesting that it was a non-layered material. A dispersion of the nanoparticles in linseed oil has been studied as a lubricant of steel–steel sliding contacts, showing the formation of a surface layer that reduces wear and mean friction coefficients with respect to the base oil.QREN-Mais Centro (project ICT-2009-02-012-1980

Profesoras y profesores. Un análisis entre sexos de la aceptación y uso de la web

Una propuesta basada en el modelo de aceptación de la tecnología (TAM) se diseña para describir la utilidad y la facilidad de uso y sus influencias en la aceptación y uso de la Web entre profesores y profesoras universitarios. Concretamente, nuestro principal objetivo se resume en analizar teórica y empíricamente, por medio de un análisis de la literatura, las cuestiones relacionadas con el papel moderador del sexo en la aceptación y uso de la Web por los profesores de Administración y Dirección de Empresas de la Universidad española. Entre los principales resultados citamos que el sexo influye significativamente en la actitud e intención de uso de la Web y modera también las relaciones claves del modelo examinado; los profesores y las profesoras no valoran de igual modo los motivos: utilidad y facilidad de uso percibidas

De Novo Sporophyte Transcriptome Assembly and Functional Annotation in the Endangered Fern Species Vandenboschia speciosa (Willd.) G. Kunkel

We sequenced the sporophyte transcriptome of Killarney fern (Vandenboschia speciosa (Willd.) G. Kunkel). In addition to being a rare endangered Macaronesian-European endemism, this species has a huge genome (10.52 Gb) as well as particular biological features and extreme ecological requirements. These characteristics, together with the systematic position of ferns among vascular plants, make it of high interest for evolutionary, conservation and functional genomics studies. The transcriptome was constructed de novo and contained 36,430 transcripts, of which 17,706 had valid BLAST hits. A total of 19,539 transcripts showed at least one of the 7362 GO terms assigned to the transcriptome, whereas 6547 transcripts showed at least one of the 1359 KEGG assigned terms. A prospective analysis of functional annotation results provided relevant insights on genes involved in important functions such as growth and development as well as physiological adaptations. In this context, a catalogue of genes involved in the genetic control of plant development, during the vegetative to reproductive transition, in stress response as well as genes coding for transcription factors is given. Altogether, this study provides a first step towards understanding the gene expression of a significant fern species and the in silico functional and comparative analyses reported here provide important data and insights for further comparative evolutionary studies in ferns and land plants in general.Spanish Ministerio de Economía y Competitividad and FEDER founds, grant: CGL2010-14856 (subprograma BOS)

Social integration and post-adoption usage of Social Network Sites An analysis of effects on learning performance

This study calls for an expansion of the scope of educational research from superficial commitment and usage behaviour to more sophisticated levels of Social Network Sites by undergraduate students, and their influences on learning performance. The research model is validated empirically using data from a field survey of the most popular Social Network Site, Facebook. Partial Least Square (PLS) is proposed to assess the relationships between the constructs together with the predictive power of the research model. Overall, our results conclude that mutual exchange and social integration are conceived as appropriate drivers of students’ post-adoption usage and, subsequently, learning performance