Beating the Air. Phenomenological remarks on the semiotics of conducting.

The subject of the article is conducting as typically known from the classical symphonic practice. The question to be discussed is: In what respect is the conductor’s beat properly to be understood as ”signing” within the frames of a sign language, and as such a proper object of semiotic analysis. My approach to the topic is primarily phenomenological. It makes analytical comments on the task of the conductor; to the very nature of the cooperative and communicative framework embedding the conductor and the musicians; and hence to the constitutional conditions for conducting. The conclusion is that in many important respects conducting is not a matter of signing and there is no such thing as a conductor’s sign language. It will be outlined how the connection between music, musicians and conductor is based on analogies between music, corporeality and onto-temporalit

The Negativity of Negative Propositions

The problem of truthmakers for negative propositions was introduced by Bertrand Russell in 1918. Since then the debate has mostly been concerned with whether to accept or reject their existence, and little has been said about what it is that makes a negative proposition negative. This is a problem as it is obvious that you cannot just read it off from the grammar of a sentence. The aim of this paper is to demonstrate that propositions may be negative or positive in many ways: it offers a typology, and shows how the question of the existence of negative facts will receive a different answer depending on its relationship to that typology

Handling Concept Drift for Predictions in Business Process Mining

Predictive services nowadays play an important role across all business sectors. However, deployed machine learning models are challenged by changing data streams over time which is described as concept drift. Prediction quality of models can be largely influenced by this phenomenon. Therefore, concept drift is usually handled by retraining of the model. However, current research lacks a recommendation which data should be selected for the retraining of the machine learning model. Therefore, we systematically analyze different data selection strategies in this work. Subsequently, we instantiate our findings on a use case in process mining which is strongly affected by concept drift. We can show that we can improve accuracy from 0.5400 to 0.7010 with concept drift handling. Furthermore, we depict the effects of the different data selection strategies

Global Integration of Central and Eastern European Financial Markets: The Role of Economic Sentiments

This paper examines the importance of different economic sentiments, e.g. consumer moods, for the Central and Eastern European countries (CEECs) during the transition process. We first analyze the importance of economic confidence with respect to the CEEC's financial markets. Since the integration of formerly strongly regulated markets into global markets can also lead to an increase of the dependence of the CEECs' domestic market performance from global sentiments, we also investigate the relationship between global economic sentiments and domestic income and share prices. Finally, we test whether the impact of global sentiments and stock prices on domestic variables increases proportionally with the degree of integration. For these purposes, we apply a structural cointegrating VAR (CVAR) framework based upon a restricted autoregressive model which allows us to distinguish between the long-run and the short-run dynamics. For the long run we find evidence supporting relationships between sentiments, income and share prices in case of the Czech Republic. Our results for the short run suggest that economic sentiments in general are strongly influenced by share prices and income but also offer some predictive power with respect to the latter. What is more, global sentiments play an important role in particular for the CEECs' share prices and income. The significance of this link increases with economic integration.Cointegration, European integration, financial markets, restricted autoregressive model, sentiments

Global Integration of Central and Eastern European Financial Markets – The Role of Economic Sentiments

This paper examines the importance of diff erent economic sentiments, e.g. consumer moods, for the Central and Eastern European countries (CEECs) during the transition process. We fi rst analyze the importance of economic confi dence with respect to the CEECs’ fi nancial markets. Since the integration of formerly strongly-regulated markets into global markets can also lead to an increase in the dependence of the CEECs’ domestic market performance on global sentiments, we also investigate the relationship between global economic sentiments and domestic income and share prices. Finally, we test whether the impact of global sentiments and stock prices on domestic variables increases proportionally with the degree of integration. We also account for eff ects stemming from global income. For these purposes, we apply a restricted cointegrating VAR (CVAR) framework based upon a restricted autoregressive model which allows us to distinguish between the long-run and the short-run dynamics. For the long run we fi nd evidence supporting relationships between sentiments, income and share prices in the case of the Czech Republic. Our results for the short run suggest that economic sentiments in general are infl uenced by share prices but also off er some predictive power with respect to the latter. What is more, European sentiments play an important role in particular for the CEECs’ share prices and income. The signifi cance of this link increases with economic integration.Cointegration; European integration; fi nancial markets; restricted autoregressive model; sentiments

Cu,Zn,Al layered double hydroxides as precursors for copper catalysts in methanol steam reforming – pH-controlled synthesis by microemulsion technique

By co-precipitation inside microemulsion droplets a Cu-based catalyst precursor was prepared with a Cu:Zn:Al ratio of 50:17:33. A pH-controlled synthesis was applied by simultaneous dosing of metal solution and precipitation agent. This technique allows for continuous operation of the synthesis and enables easy and feasible up-scaling. For comparison conventional co-precipitation was applied with the same composition. Both techniques resulted in phase pure layered double hydroxide precursors and finally (after calcination and reduction) in small Cu nanoparticles (8 nm) and ZnAl2O4. By applying the microemulsion technique smaller Cu/ZnAl2O4 aggregates with less embedded Cu particles were obtained. The microemulsion product exhibited a higher BET and specific Cu surface area and also a higher absolute catalytic activity in methanol steam reforming. However, the Cu surface area-normalized, intrinsic activity was lower. This observation was related to differences in interactions of Cu metal and oxide phase

Correlated EoM and Distributions for A=6 Nuclei

Energy spectra and electromagnetic transitions of nuclei are strongly depending from the correlations of the bound nucleons. Two particle correlations are responsible for the scattering of model particles either to low momentum- or to high momentum-states. The low momentum states form the model space while the high momentum states are used to calculate the G-matrix. The three and higher order particle correlations do not play a role in the latter calculation especially if the correlations induced by the scattering operator are of sufficient short range. They modify however, via the long tail of the nuclear potential, the Slater determinant of the A particles by generating excited Slater's determinants. In this work the influence of the correlations on the level structure and ground state distributions of even open shell nuclei is analyzed via the boson dynamic correlation model BDCM. The model is based on the unitary operator $e^S$ ({\it S} is the correlation operator) formalism which in this paper is presented within a non perturbative approximation. The low lying spectrum calculated for $^6$Li reproduce very well the experimental spectrum while for $^6$He a charge radius slightly larger than that obtained within the isotopic-shift (IS) theory has been calculated. Good agreement between theoretical and experimental results has been obtained without the introduction of a genuine three body force.Comment: 25 pages 4 figures. To be published in the Progress Theoretical Physic