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The climate system can be regarded as a dynamic nonlinear system. Thus, traditional linear statistical methods fail to model the nonlinearities of such a system. These nonlinea-rities render it necessary to find alternative statistical techniques. Since artificial neural network models (NNM) represent such a nonlinear statistical method their use in(More)
The Pebble Bed Modular Reactor (PBMR) plant is a promising concept for inherently safe nuclear power generation. This paper presents two dynamic models for the core of a High Temperature Reactor (HTR) power plant with a helium gas turbine. Both the PBMR and its power conversion unit (PCU) based on a three-shaft, closed cycle, recuperative, inter-cooled(More)
Classification of substances as teratogenic is based on the observation of external, visceral and skeletal anomalies. Characterization of anomalies as variation or malformation is contingent upon their postnatal persistence and adversity to health. Lack of information thereof may result in inconsistent or incorrect classification. The aim of this work is(More)
The present work analyses and investigates the behaviour of a High Temperature Reactor (HTR) with a Pebble Bed core connected to a Brayton cycle Power Conversion Unit (PCU) during operational and accident conditions. The modelling of a complete circuit including both the PCU and the Pebble Bed Reactor has been performed with the commercial thermal-fluid(More)
BACKGROUND In clinical practice, several techniques for the evaluation of colour vision deficiencies are well established. Most of them are designed for the detection of congenital or pathological changes. Due to the narrow-banded light sources, used in monitors or anomaloscopes, the human gamut can be addressed only in part. With these set-ups, the impact(More)
BACKGROUND Glaucoma is associated with a progressive loss of retinal ganglion cell axons and the evaluation of the thickness of the retinal nerve fibre layer (RNFL) is important for early diagnosis and follow-up. Results of RNFL thickness measurements may vary according to the devices used. Therefore, the present study has analysed and compared the(More)
The authors present a form of heredodegenerative spinocerebellar ataxia with concomitant involvement of ectodermal structures, different from other variants. The disease was characterized by spinocerebellar ataxia (the complete form); curly, thin, short and dense hair, mikroskopically monilethrix; a characteristic face (hypertelorism, flattened and wide(More)
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