Four classical kinds of information sources that are consulted in formal language learning processes as studied in the area of Grammatical Inference are the following: Membership queries, equivalence queries, finite subsets of the target language (positive samples), and finite subsets of its complement (negative samples). One of the language classes that have been studied most thoroughly so far...

Data has appeared to be a new kind of commodity with distinctive characteristics, which make it fundamentally different from physical goods as well as traditional digital goods. Therefore, new trading mechanisms for data need to be designed. In this paper, we model the data market as an auction with negative externalities, and design practical mechanisms for data trading. Specifically, we propo...

A recent study designed to investigate a possible psychological mechanism behind the widespread indifference or opposition towards immortalism is presented. In the wider context of a psychological experiment, which is not reported in detail here, the study tested different ways to advertise immortalism, but failed to identify a superior strategy. The theory behind the study, possible explanatio...

The paper introduces the concept of a negative database, in which a set of records DB is represented by its complement set. That is, all the records not in DB are represented, and DB itself is not explicitly stored. After introducing the concept, several results are given regarding the feasibility of such a scheme and its potential for enhancing privacy. It is shown that a database consisting o...

<p style='text-indent:20px;'>The conventional data envelopment analysis (DEA) models presume that the values of input-output variables decision-making units (DMUs) are precisely known. However, some real-life situations can authoritatively mandate to vary in concrete fine-tuned ranges, which include negative and measures allowed take integer only. Our study proposes an integrated dynamic ...