To compensate for loss of business during the COVID-19 crisis, wineries in the tourism industry had to apply new strategies. In order to collect and compare these newly developed sustainable strategies, a cross-cultural study has been conducted in 2021. This study is based on a qualitative survey using purposeful sampling with key decision-makers of 70 wineries from the U.S., Australia, Germany, Hungary, and Romania covering wine growing countries both from the Old and New World. The aim was to identify new and sustainable initiatives and resilience strategies implemented to deal with the disruption caused by the COVID-19 pandemic, noting any cultural differences in each country’s response and to analyse the perspectives of wine tourism in the future. The findings highlight the wineries’ impressive focus on creativity and flexibility while also bringing attention to cultural differences. The insights form a preliminary suggestion for best practice strategies that businesses within wine tourism may consider helpful in their future business planning.
A linear autonomous differential equation with small delay is considered in this paper. It is shown that under a smallness condition the delay differential equation is asymptotically equivalent to a linear ordinary differential equation with constant coefficients. The coefficient matrix of the ordinary differential equation is a solution of an associated matrix equation and it can be written as a limit of a sequence of matrices obtained by successive approximations. The eigenvalues of the approximating matrices converge exponentially to the dominant characteristic roots of the delay differential equation and an explicit estimate for the approximation error is given.
Abstract:In this work, an explicit Model Predictive Control algorithm is devised and compared to classical control algorithms applied to a series resonant DC/DC converter circuit. In the first part, a model of the converter as a hybrid system is created and studied. In the second part, the predictive algorithm is applied and tested on the model. Finally, the designed control algorithm is compared to classical PI and sliding mode controllers.
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