Sparse and Cosparse Audio Dequantization Using Convex Optimization

The paper shows the potential of sparsity-based methods in restoring quantized signals. Following up on the study of Brauer et al. (IEEE ICASSP 2016), we significantly extend the range of the evaluation scenarios: we introduce the analysis (cosparse) model, we use more effective algorithms, we experiment with another time-frequency transform. The paper shows that the analysis-based model performs comparably to the synthesis-model, but the Gabor transform produces better results than the originally used cosine transform. Last but not least, we provide codes and data in a reproducible way

Bakhtin and theatre?

Review of Dick McCaw. Bakhtin and Theatre: Dialogues with Stanislavsky, Meyerhold and Grotowski. London and New York: Routledge, 2016. 247pp

Rough sets theory and uncertainty into information system

This article is focused on rough sets approach to expression of uncertainty into information system. We assume that the data are presented in the decision table and that some attribute values are lost. At first the theoretical background is described and after that, computations on real-life data are presented. In computation we wok with uncertainty coming from missing attribute values

Why a World State is Unavoidable in Planetary Defense: On Loopholes in the Vision of a Cosmopolitan Governance

The main claim of this chapter is that planetary defense against asteroids cannot be implemented under a decentralized model of democratic global governance, as espoused elsewhere in this book. All relevant indices point to the necessity of establishing a centralized global political authority with legitimate coercive powers. It remains to be seen, however, whether such a political system can be in any recognizable sense democratic. It seems unconvincing that planetary-wide physical-threat, all-comprehensive macrosecuritization, coupled with deep transformations of international law, global centralization of core decision-making powers, de-stigmatization of nuclear weapons and the like can proceed, succeed, and be implemented in a non-hierarchical international system where planetary defense constitutes only one regime among many, and where states basically remain the decisive actors. Although rationally and scientifically robust, the project suffers from oversimplification, as well as naivety with respect to how both international and domestic politics works. Among other topics, this chapter discusses problems associated with the rule of law and constituent powers, political representation and sources of legitimacy, conditions of multilevel collective action, or limits of theoretical idealization. The general message is that the planetary defense community needs to be more aware of the social and political context of its own enterprise