The Critical Model Parameter

2013 ◽  
pp. 91-108
Author(s):  
Elisa Alghisi Manganello ◽  
Valentina Leucari

Author(s):  
Vijay Iyer

Improvisation has been construed as Western art music’s Other. This chapter urges music theorists to take the consequences of this configuration seriously. The decision to exclude improvisation as inherently unstable is not neutral, but is bound up with the endemic racism that has characterized social relations in the West and that is being brought to the fore in Black Lives Matter and other recent social and political movements. Traditional music theory is not immune from such institutional racism—its insistence on normative musical behaviors is founded on the (white) phallogocentrism of Western thought. Does the resurgent academic interest in improvisation offer a way out? No, at least not as it is currently studied. Even an apparently impartial approach such as cognitive science is not neutral; perception is colored by race. To get anywhere, this chapter argues, improvisation studies must take difference seriously. Important impetus for a more inclusive critical model comes from such fields as Black studies, Women’s studies, subaltern studies, queer studies, and disability studies.


2018 ◽  
Vol 867 (1) ◽  
pp. 46 ◽  
Author(s):  
Ryohei Itoh ◽  
Masami Ouchi ◽  
Haibin Zhang ◽  
Akio K. Inoue ◽  
Ken Mawatari ◽  
...  

2020 ◽  
Vol 500 (2) ◽  
pp. 2532-2542
Author(s):  
Linda Blot ◽  
Pier-Stefano Corasaniti ◽  
Yann Rasera ◽  
Shankar Agarwal

ABSTRACT Future galaxy surveys will provide accurate measurements of the matter power spectrum across an unprecedented range of scales and redshifts. The analysis of these data will require one to accurately model the imprint of non-linearities of the matter density field. In particular, these induce a non-Gaussian contribution to the data covariance that needs to be properly taken into account to realize unbiased cosmological parameter inference analyses. Here, we study the cosmological dependence of the matter power spectrum covariance using a dedicated suite of N-body simulations, the Dark Energy Universe Simulation–Parallel Universe Runs (DEUS-PUR) Cosmo. These consist of 512 realizations for 10 different cosmologies where we vary the matter density Ωm, the amplitude of density fluctuations σ8, the reduced Hubble parameter h, and a constant dark energy equation of state w by approximately $10{{\ \rm per\ cent}}$. We use these data to evaluate the first and second derivatives of the power spectrum covariance with respect to a fiducial Λ-cold dark matter cosmology. We find that the variations can be as large as $150{{\ \rm per\ cent}}$ depending on the scale, redshift, and model parameter considered. By performing a Fisher matrix analysis we explore the impact of different choices in modelling the cosmological dependence of the covariance. Our results suggest that fixing the covariance to a fiducial cosmology can significantly affect the recovered parameter errors and that modelling the cosmological dependence of the variance while keeping the correlation coefficient fixed can alleviate the impact of this effect.


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