65 research outputs found

    The identification of problems in the rubber compound production process using selected methods and quality management tools

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    The paper presents theoretical basis for problem identification related to the production of rubber mixture in which they were characterized methods and tools for quality management. The main aim of the paper is use of selected methods and tools to identify problems during the production of rubber mixture in the enterprise. Based on information and observation were identified problems occurring in individual stages the actual production process of rubber compound. The aim were gathered information the process, have been applied tools in the form of a control sheet and block diagram. To illustrate and present particular causes and effects of defects it was made Ishikawa diagram, which it was the starting point for the analysis FMEA to determine the level of risk and to develop preventive actions. Based on the collected data, identification of the most common problems using the Pareto-Lorenzo diagram has been made

    Adult Toxocara canis encephalitis.

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    A 48-year-old patient with Toxocara canis infection developed severe ataxia, rigor and neuropsychological disturbances. An aetiology was proven by an indirect immunofluorescence test. CT and MRI revealed both diffuse and circumscribed white matter lesions. Angiography showed multiple occlusion of branches of the middle cerebral artery. Anthelminthic treatment was beneficial in the initial stage of the disease, but had no effect on progression of CNS symptoms. Immunosuppressive therapy with prednisolone and azathioprine yielded partial recovery and stabilisation of the patient

    EEG-VerÀnderungen bei HIV-Infektionen

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    Benzotrithiophene Copolymers: Influence of Molecular Packing and Energy Levels on Charge Carrier Mobility

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    The planar benzotrithiophene unit (<b>BTT</b>) was incorporated into four different donor polymers, and by systematically changing the nature and positioning of the solubilizing alkyl side chains along the conjugated backbone, the polymers’ frontier energy levels and optoelectronic properties were controlled. Reducing the steric hindrance along the polymer backbone lead to strong interchain aggregation and highly ordered thin films, achieving hole mobilities of 0.04 cm<sup>2</sup>/(V s) in organic thin film transistors. In an attempt to increase the polymer’s processability and reduce chain aggregation, steric hindrance between alkyl side chains was exploited. As a result of the increased solubility, the film forming properties of the polymer could be improved, but at the cost of reduced hole mobilities in OFET devices, due to the lack of long-range order in the polymer films
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