In the last decade a high amount of photovoltaic and wind power generators have been connected to the electric grid, introducing operational problems for transmission and distribution system operators due to the variability and the non-programmability of solar radiation and wind. The paper concerns an analysis on the benefits in adopting storage systems to reduce the imbalance costs associated to renewable energy sources. An analysis on a photovoltaic system has been performed considering different battery technologies. Discrete-time Markov chains have been used to generate a 20 years' time series of irradiance, that has been used to calculate the PV power production. Markov simulation parameters have been deeply studied in order to optimize them and obtain reliable synthetic data of ground irradiance. This data was then used as input of a hybrid PV and storage model allowing to obtain realistic economic and technical results, improving thus the results respect to the methods based on probabilistic weather simulations. An imbalance tariff has been assumed and its cost has been analysed in relation to the storage system costs. An optimal size for the different battery technology has been investigated considering the reduction of variability of the photovoltaic production and the economic convenience of\ud the hybrid system. The use of Markov chains for the optimization of the battery size can be considered as the major novelty of the proposed approach

The study investigated whether the application of the Diagnostic and Statistical Manual of Mental Disorders , fifth edition ( DSM-5 ) diagnostic criteria for autism spectrum disorder results in different diagnostic outcomes compared with the DSM , fourth edition, text revision ( DSM-IV-TR ) in a cohort of Italian children with autism. To do so, both DSM-IV-TR and DSM-5 diagnostic criteria were applied to children believed to have autism. In comparison with the DSM-IV-TR criteria, DSM-5 criteria resulted in a lower proportion of children being diagnosed with autism. This difference in diagnostic outcome has implications about the access of children with autism to health care services as well as for their families being able to receive adequate support. We suggest that some DSM-5 diagnostic criteria for a diagnosis of autism should be revisited. [ Psychiatr Ann . 2020;51(1):38–46.]

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