Meteorological conditions, physiochemical properties, thermal-oxygen stratification, water overturn and water balance of Lake Gardno on Wolin Island

Storage The main research problem of the paper is aimed at determining the proper functioning of Lake Gardno within the period 2012-2014 considered as hydrological years in reference to the physiochemical properties of its waters, water balance, thermal regime and water overturn.Lake Gardno is a representative of non-run-off lake geo-eco-systems; i

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Simple approximations for the ruin probability in the risk model with stochastic premiums and a constant dividend strategy

We deal with a generalization of the risk model with stochastic premiums where Braces dividends are paid according to a constant dividend strategy and consider heuristic approximations for the ruin probability.To be more precise, we construct five- and three-moment analogues to the De Vylder approximation.To this end, we obtain an explicit formula

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