397 research outputs found

    Automation of profile packing

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    Alumeco’s strategy is to be the most effective logistic partner through effective handling and warehousing of aluminium products. In order to achieve this goal, Alumeco has to be working with the newest technology and constantly improve processes and methods. In the central warehouse in Odense the activity is mainly based on two high rack systems. One high rack is for handling aluminium sheets and the other one is for profiles and bars. The weekly activity on the two high racks ismore than 1500 orderliness per week. (500 sheets and 1000 profiles and bars). Therefore, Alumeco wants to investigate the opportunity to automate the process of packing profiles and bars from the existing high rack. Today the handling and packing of profiles is carried out manually by the stock workers. It means that it is a heavy physical process. Summing up, the goal to this project must be: • A packing line that can handle 70% of all orderliness • No handling of material by hand or manual crane Getting these goals Alumeco will save money, they will increase their incomes and they will become the leader in the handling of aluminium profiles and bars because nowadays there are no factories with an automatic method. In this way one of the Alumeco’s strategies we will achieve: to be the most effective logistic partner through effective handling and warehousing of aluminium products

    Ontología y didáctica: Una aproximación híbrida de base prudencial

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    Con el presente trabajo queremos considerar la relación de Ontología y Didáctica desde los presupuestos propios de la Hermenéutica Analógica. Desde ahí nos ocuparemos más concretamente de la ontología didáctica reflexionado, sobre todo, acerca de sus manifestaciones normativa-reguladora, epistemológica-crítica y práctico-metodológica. Para ello prestaremos atención a aquellos espacios donde Hermenéutica Analógica y Didáctica en nuestra propuesta de consideración deben confluir

    Aceite de Borago morisiana rico en ácido gamma linolénico, composición y usos del mismo

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    Publication number: ES2586731 A1 (18.10.2016) Also published as: ES2586731 B2 (24.03.2017) Application number: 201500301 (15.04.2015)La presente invención versa sobre ácido gamma-linolénico (GLA, 18:3n-6), un ácido graso beneficioso para la salud perteneciente la familia omega-6. Se propone y protege el uso del aceite extraído de las semillas de Borago morisiana, perteneciente a la familia Boraginaceae. Este aceite contendría GLA en el intervalo 23,0-27,0 en porcentaje con respecto al total de ácidos grasos en la materia grasa. Se reivindica su uso como suplemento alimenticio humano y animal, como cosmético o en formulaciones farmacéuticas como suplemento nutricional para el tratamiento de enfermedades producidas por deficiencias de ácidos grasos esenciales.Universidad de Almerí

    Asymptotic behaviour of zeros of exceptional Jacobi and Laguerre polynomials

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    The location and asymptotic behaviour for large n of the zeros of exceptional Jacobi and Laguerre polynomials are discussed. The zeros of exceptional polynomials fall into two classes: the regular zeros, which lie in the interval of orthogonality and the exceptional zeros, which lie outside that interval. We show that the regular zeros have two interlacing properties: one is the natural interlacing between consecutive polynomials as a consequence of their Sturm-Liouville character, while the other one shows interlacing between the zeros of exceptional and classical polynomials. A generalization of the classical Heine-Mehler formula is provided for the exceptional polynomials, which allows to derive the asymptotic behaviour of their regular zeros. We also describe the location and the asymptotic behaviour of the exceptional zeros, which converge for large n to fixed values.Comment: 19 pages, 3 figures, typed in AMS-LaTe

    Aprendizaje del sistema nervioso mediante metodologías activas: una propuesta didáctica para anatomía aplicada de 1º de bachillerato

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    El presente trabajo se centra en la unidad didáctica “sistema nervioso” de la asignatura optativa anatomía aplicada (1º de bachillerato), planificada e impartida durante el prácticum II. El desarrollo de la misma se realizó con el único grupo de la asignatura, constituido por tan solo doce alumno/as. Se trata de una clase con estudiantes aplicados y trabajadores pero en la que existe una notable falta de participación activa y cohesión grupal. Por este motivo, se programaron varias actividades llevadas a cabo a través de metodologías activas.<br /

    Retinal and choroidal thickness in myopic young adults

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    The retinal and the choroidal thickness were measured at four locations along the horizontal direction (foveola, one nasal to the fovea and two temporal) in a group of 43 young adults (mean age: 27.1 ± 3.9 years), with ocular refraction ranging from emmetropia to high myopia (0 to −10D). Thickness values were obtained from OCT images centered at the foveal depression. The retinal thickness exhibited a correlation with refraction at all eccentricities but not at the fovea. When different subgroups of refraction were considered, the analysis of such correlations indicated that only the retinal thickness in the group of high myopia (refraction ≤ −6D) was statistically different from the other two groups (emmetropes: [−0.5, 0] D, and myopes: (−6, −0.5) D). No significant differences were found between emmetropic and myopic groups. In contrast to the retina, the choroidal thickness exhibited a significant correlation with refraction at the fovea, although such dependency only stood for high myopes (the choroid of myopes and emmetropes exhibited similar thickness). Correlation with refraction was also found at the nasal location, arising between emmetropic and high myopia groups. Other choroidal locations among groups did not exhibit relationship with the refraction. It is concluded that the differences in the choroid and retina thickness along the horizontal meridian as a function of refraction do not characterize the onset and progression of myopia at early stages, since they only manifest in the group of high myopia

    La Hermenéutica Analógica aplicada a la Didáctica: Algunas consideraciones preliminares

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    La intención de este artículo es la de establecer las bases de la ciencia didáctica. Esta perspectiva parte de la concepción de la didáctica como una ciencia hermenéutica. Pero no sólo eso. Didáctica es ciencia y arte. Una disciplina híbrida que necesita de esta intermediación epistémica. De aquí que la didáctica que se propone es fuertemente analógica

    Agent Programming in Ciao Prolog

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    The agent programming landscape has been revealed as a natural framework for developing “intelligence” in AI. This can be seen from the extensive use of the agent concept in presenting (and developing) AI systems, the proliferation of agent theories, and the evolution of concepts such as agent societies (social intelligence) and coordination

    Effects of lindane on the photosynthetic apparatus of the cyanobacterium anabaena

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    Intention, Goal, Scope, Background: Cyanobacteria have the natural ability to degrade moderate amounts of organic pollutants. However, when pollutant concentration exceeds the level of tolerance, bleaching of the cells and death occur within 24 hours. Under stress conditions, cyanobacterial response includes the short-term adaptation of the photosynthetic apparatus to light quality, named state transitions. Moreover, prolonged stresses produce changes in the functional organization of phycobilisomes and in the core-complexes of both photosystems, which can result in large changes in the PS II fluorescence yield. The localization of ferredoxin-NADP+ reductase (FNR) at the ends of some peripheral rods of the cyanobacterial phycobilisomes, makes this protein a useful marker to check phycobilisome integrity. Objective: The goal of this work is to improve the knowledge of the mechanism of action of a very potent pesticide, lindane (γ-hexaclorociclohexane), in the cyanobacteriumAnabaena sp., which can be considered a potential candidate for bioremediation of pesticides. We have studied the effect of lindane on the photosynthetic apparatus ofAnabaena using fluorescence induction studies. As ferredoxin-NADP+ reductase plays a key role in the response to oxidative stress in several systems, changes in synthesis, degradation and activity of FNR were analyzed. Immunolocalization of this enzyme was used as a marker of phycobilisome integrity. The knowledge of the changes caused by lindane in the photosynthetic apparatus is essential for rational further design of genetically-modified cyanobacteria with improved biorremediation abilities. Methods: Polyphasic chlorophylla fluorescence rise measurements (OJIP) have been used to evaluate the vitality and stress adaptation of the nitrogen-fixing cyanobacteriumAnabaena PCC 7119 in the presence of increasing concentrations of lindane. Effects of the pesticide on the ultrastructure have been investigated by electron microscopy, and FNR has been used as a marker of phycobilisome integrity. Results and Discussion: Cultures ofAnabaena sp. treated with moderate amounts of lindane showed a decrease in growth rate followed by a recovery after 72 hours of pesticide treatment. Concentrations of lindane below 5 ppm increased the photosynthetic performance and activity of the cells. Higher amounts of pesticide caused a decrease in these activities which seems to be due to a non-competitive inhibition of PS II. Active PS II units are converted into non-QA reducing, so called heat sink centers. Specific activity and amount of FNR in lindane-treated cells were similar to the values measured in control cultures. Release of FNR from the thylakoid after 48 hours of exposure to 5 ppm of lindane towards the cytoplasm was detected by immunogold labeling and electron microscopy. Conclusions: From these results, we conclude that the photosynthetic performance and activity of the cells are slightly increased in the presence of lindane up to 5 ppm. Moreover, in those conditions, iindane did not produce significant changes in the synthesis, degradation or activity of FNR. The high capability ofAnabaena to tolerate lindane makes this cyanobacterium a good candidate for phytoremediation of polluted areas. Recommendation and Outlook: The results of this study show that cultures ofAnabaena PCC 7119 tolerate lindane up to 5 ppm, without significant changes in the photosynthetic vitality index of the cells. However, a slight increase in phycobiliprotein synthesis is observed, which is related to total protein content. This change might be due to degradation of proteins less stable than phycobiliproteins. An identification of the proteins with altered expression pattern in the presence of the pesticide remains the subject of further work and will provide valuable information for the preparation of strains which are highly tolerant to lindan
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