MERGING EPISTEMIC AND TEMPORAL MODELS: A HISTORY-FREE APPROACH

There are two approaches to merging temporal and epistemic models. The first one consists in starting with a temporal model and enriching it with epistemic dimension (as tem- poral epistemic logic), while the second one is supposed to start with an epistemic model intro- ducing temporal dimension (dynamic epistemic logic, epistemic temporal logic). The proposed evolutionary epistemic model (EEM) is based on the standard epistemic model with an evolu- tionary relation. EEM captures knowledge changes in terms of the evolution of worlds included in different epistemic contexts. Unlike other temporal-epistemic models, EEM is free from the concept of history and enriched with quantification operators over the worlds’ evolution stages.There are two approaches to merging temporal and epistemic models. The first one consists in starting with a temporal model and enriching it with epistemic dimension (as temporal epistemic logic), while the second one is supposed to start with an epistemic model introducing temporal dimension (dynamic epistemic logic, epistemic temporal logic). The proposed evolutionary epistemic model (EEM) is based on the standard epistemic model with an evolu- tionary relation. EEM captures knowledge changes in terms of the evolution of worlds included in different epistemic contexts. Unlike other temporal-epistemic models, EEM is free from the concept of history and enriched with quantification operators over the worlds’ evolution stages

A shallow layer laboratory model of large-scale atmospheric circulation

A new shallow layer laboratory model of global atmosphere circulation is realized. The shallow rotating cylindrical layer of fluid with the localized heater at the bottom periphery and localized cooler in the central part of the upper boundary is considered. The rim heater imitates the equator heating and disc cooler -- the north pole cooling. The rim heater is intentionally shifted from the sidewall to decrease the influence of the no-slip vertical boundaries and provide anticyclonic-cyclonic motion in the upper layer, imitating the formation of large-scale zonal flows (easterlies and westerlies) in the low latitudes. The low-viscous silicon oil is used instead of water to avoid complex effects provided by the formation of a thin film of a surface-active substance on the open surface. The flow transforms from the Hadley-like regime to the baroclinic wave regime through transitional states. The decrease in the thermal Rossby number for the fixed value of Taylor number results in the regularization of the baroclinic waves. The main difference between presented and classical annulus configurations is the absence of the steady waves. All wave regimes, even with regular wave structures, are characterized by strong non-periodic fluctuations. The observed baroclinic wave structures are a combination of temporarily evolving different baroclinic modes. The presented model provides the formation of atmospheric-like flows, characterized by complex temporal behaviour and can serve as an efficient tool for studying different aspects of global atmospheric circulation

Excitation of magnetic precession in bismuth iron garnet via a polarization-independent impulsive photomagnetic effect

A polarization-independent, nonthermal optical effect on the magnetization in bismuth iron garnet is found, in addition to the circular polarization-dependent inverse Faraday effect and the linear polarization-dependent photoinduced magnetic anisotropy. Its impulsive character is demonstrated by the field dependence of the amplitude of the resulting precession, which cannot be explained by a long-living photo or heat-induced anisotropy.Comment: 12 pages, 3 Figure

Gypsy policy and Roma activism : from the interwar period to current policies and challenges

The editorial introduces the key ideas of this thematic issue, which originated within the European Research Council project ‘RomaInterbellum. Roma Civic Emancipation between the Two World Wars.’ The period between WWI and WWII in the region of Central, Southeastern and Eastern Europe was an era of worldwide significant changes, which marked the birth of the Roma civic emancipation movement and impacted Roma communities’ living strategies and visions about their future, worldwide. The aspiration of this thematic issue is to present the main dimensions of the processes of Roma civic emancipation and to outline the role of the Roma as active participants in the historical processes occurring in the studied region and as the creators of their own history. The editorial offers clarifications on the terminology and methodology employed in the articles included in this issue and their spatial and chronological parameters while also briefly introducing the individual authored studies of this issue.Publisher PDFPeer reviewe

The research works of Coulomb and Amontons and generalized laws of friction

The paper is devoted to the contributions of Coulomb and Amontons to the physics of friction from the viewpoint of current discussions and attempts to formulate generalized laws of friction

Orientalism in Romani studies : the case of Eastern Europe

The article offers an critical analysis of the current state of the academic approaches in the field of Romani studies through prism of Orientalist approach not only toward research subject but also towards Romani scholars from Roma and Non-Roma origin. The article presents different approaches and methodological problems that appear in the study of Roma who live in Eastern Europe, or of Eastern European Origin. Two basic paradigms of Romani studies and in social practice and politics are discussed – their exoticization and their marginalisation, which can take on features of one or both of these two paradigms. On this backdrop the issues of academic ethic in Romani studies is raised. The emergence of NGO-science and native science as specific reflection of the two basic paradigms are discussed as well.Postprin

Rethinking Roma holocaust : victims or/and victors

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