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One's own soundtrack: Affective music synthesis
Computer music usually sounds mechanical; hence, if musicality and music expression of virtual actors could be enhanced according to the user's mood, the quality of experience would be amplified. We present a solution that is based on improvisation using cognitive models, case based reasoning (CBR) and fuzzy values acting on close-to-affect-target musical notes as retrieved from CBR per context. It modifies music pieces according to the interpretation of the user's emotive state as computed by the emotive input acquisition componential of the CALLAS framework. The CALLAS framework incorporates the Pleasure-Arousal- Dominance (PAD) model that reflects emotive state of the user and represents the criteria for the music affectivisation process. Using combinations of positive and negative states for affective dynamics, the octants of temperament space as specified by this model are stored as base reference emotive states in the case repository, each case including a configurable mapping of affectivisation parameters. Suitable previous cases are selected and retrieved by the CBR subsystem to compute solutions for new cases, affect values from which control the music synthesis process allowing for a level of interactivity that makes way for an interesting environment to experiment and learn about expression in music
Theoretical analysis of the atmospheres of CP stars. Effects of the individual abundance patterns
Context. See abstract in the paper.
Aims. See abstract in the paper.
Methods. See abstract in the paper.
Results. We present a homogeneous study of model atmosphere temperature
structure, energy distribution, photometric indices in the uvbybeta and Delta_a
systems, hydrogen line profiles, and the abundance determination procedure as
it applies to CP stars. In particular, we found that Si, Cr and Fe are the main
elements to influence model atmospheres of CP stars, and thus to be considered
in order to assess the adequacy of model atmospheres with scaled solar
abundances in application to CP stars. We provide a theoretical explanation of
the robust property of the Delta_a photometric system to recognize CP stars
with peculiar Fe content. Also, the results of our numerical tests using model
atmospheres with one or several elements overabundant (Si and Fe by +1 dex, Cr
by +2 dex) suggest that the uncertainty of abundance analysis in the
atmospheres of CP stars using models with scaled abundances is less than
plus/minus 0.25 dex. If the same homogeneous models are used for the abundance
stratification analysis then we find that the uncertainty of the value of the
vertical abundance gradient is within an 0.4 dex error bar.
Conclusions. Model atmospheres with individual abundance patterns should be
used in order to match the actual anomalies of CP stars and minimize analysis
errors.Comment: 18 pages, 9 figure
Playing Games with Quantum Mechanics
We present a perspective on quantum games that focuses on the physical
aspects of the quantities that are used to implement a game. If a game is to be
played, it has to be played with objects and actions that have some physical
existence. We call such games playable. By focusing on the notion of
playability for games we can more clearly see the distinction between classical
and quantum games and tackle the thorny issue of what it means to quantize a
game. The approach we take can more properly be thought of as gaming the
quantum rather than quantizing a game and we find that in this perspective we
can think of a complete quantum game, for a given set of preferences, as
representing a single family of quantum games with many different playable
versions. The versions of Quantum Prisoners Dilemma presented in the literature
can therefore be thought of specific instances of the single family of Quantum
Prisoner's Dilemma with respect to a particular measurement. The conditions for
equilibrium are given for playable quantum games both in terms of expected
outcomes and a geometric approach. We discuss how any quantum game can be
simulated with a classical game played with classical coins as far as the
strategy selections and expected outcomes are concerned.Comment: 3 Figure
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