Tourism in Perú has become very important, since there is a growing number of tourists arriving each year. This paper focus in understand what do speakingenglish tourists have in consideration when they visit Perú. We obtained all the tweets published in english during the year 2016, filtered by touristic places visited. In total, more than 192 thousand tweets were collected. We performed diffe...

Hedonic valuation of quality attributes can be misleading when the assumption that these attributes are exogenous to sample selection is violated. This paper considers the simultaneity between hedonic valuation and sample selection in the context of a model of producer behavior and investigates empirically the case where land is demanded for use as an input either in agricultural production or ...

ASTI is an Arabic-speaking spoken language understanding (SLU) system which carries out two kinds of analysis which are relatively opposed. It is designed for touristic field to tell trippers about something that interests them. Based on a dual approach, the system adapts the idea of stochastic approach to the probabilistic context free grammar (PCFG) (approach based on rules). This paper provi...

additional members of the examination board. I would like to thank my " co-advisor " Berthold Vöcking for a very valuable collaboration. It was a lot of fun to master several problems in theoretical computer science and other major spheres of life with Berthold, such as solving a traveling salesperson problem given by the touristic highlights in California and changing several car tires with un...