17,140 research outputs found
Diffeomorphisms from higher dimensional W-algebras
Classical W-algebras in higher dimensions have been recently constructed. In
this letter we show that there is a finitely generated subalgebra which is
isomorphic to the algebra of local diffeomorphisms in D dimensions. Moreover,
there is a tower of infinitely many fields transforming under this subalgebra
as symmetric tensorial one-densities. We also unravel a structure isomorphic to
the Schouten symmetric bracket, providing a natural generalization of w_\infty
in higher dimensions.Comment: 10 page
Dissipative Dynamics of Highly Anisotropic Systems
In this paper we present a method to improve the description of 0+1
dimensional boost invariant dissipative dynamics in the presence of large
momentum-space anisotropies. We do this by reorganizing the canonical
hydrodynamic expansion of the distribution function around a momentum-space
anisotropic ansatz rather than an isotropic equilibrium one. At leading order
the result obtained is two coupled ordinary differential equations for the
momentum-space anisotropy and typical momentum of the degrees of freedom. We
show that this framework can reproduce both the ideal hydrodynamic and free
streaming limits. Additionally, we demonstrate that when linearized the
differential equations reduce to 2nd order Israel-Stewart viscous
hydrodynamics. Finally, we make quantitative comparisons of the evolution of
the pressure anisotropy within our approach and 2nd order viscous hydrodynamics
in both the strong and weak coupling limits.Comment: 17 pages, 5 figures; Published versio
An analysis of the Lattice QCD spectra for and
In this talk I present the results obtained using effective field theories in
a finite volume from a reanalysis of lattice data on the systems,
where bound states of and are found and associated with the states
and , respectively. We confirm the presence of
such states on the lattice data and determine the weight of the channel in
the wave function of and that of in the wave function
of . Our results indicate a large meson-meson component in both
cases.Comment: Conference Proceedings, Hadron 2017, Salamanca, Spai
Gobierno local abierto: diagnóstico en México y Oaxaca
Con un enfoque centrado en el ciudadano y el uso de las tecnologÃas de la información y la comunicación, la expresión gobierno abierto ha revolucionado la administración pública. Esto ha implicado una alta deliberación, colaboración, participación y publicidad. El objetivo del presente artÃculo es diagnosticar los estados cuyos municipios siguen el proyecto de gobierno abierto, para lo cual se tomó como muestra a los estados de México y Oaxaca, donde se compararon los estratos de desarrollo humano muy alto y bajo. A partir de ello se formuló la hipótesis de que los gobiernos locales en México responden de forma diferente a la expresión gobierno abierto cuando este tiene que ver de manera directa y proporcional con el desarrollo humano. Es decir, los municipios con mayor desarrollo humano tuvieron también mayor nivel de gobierno abierto, mientras que los gobiernos con menor desarrollo humano alcanzaron niveles inferiores de gobierno abierto. Se estudiaron 30 municipios de ambas entidades, con diez variables a analizar mediante contraste estadÃstico de chi cuadrada y coeficiente de correlación r de Pearson. Los resultados demostraron que sà existe una relación entre desarrollo humano y gobierno abierto
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Screening of Commercially Available Chlorine Based Sanitizers and their Efficacy in Reducing Microbial Load Levels of E. coli O157:H7 at High and Low Organic Load Environments
The presence of postharvest sanitizers has shown to be an effective approach to reducing microbial cross contamination in agricultural washing operations. However, choosing an appropriate sanitizer can be challenging due to produce commodity, processing conditions and interference with organic load. Current research shows a wide variety of methods to mimic the organic load of vegetable processing conditions, with paddle mixing and blender as the most commonly used. Controlling and understanding the physiochemical properties of wash water is key in maintaining sanitizer efficacy. The effects of simulated wash water preparation method on the physiochemical properties were tested at 0 and 50 COD(mg/L) and no significant difference was observed. However, at high levels of organic load results showed a significant difference between turbidity values at 1,500 COD. Free residual chlorine titration methods were compared, using DPD-titrimetric and Iodometric method. Results showed a significant difference between titration methods in organic load heavy environments. Commercially available chlorine based sanitizers, Pure Bright™ Germicidal Bleach and Clorox® Germicidal Bleach, were compared to a concentrated solution of sodium hypochlorite. Pure Bright™ Germicidal Bleach showed to perform the best by reducing 7 log CFU/ml of E. coli O157:H7 after 30 seconds in no organic load environments, whereas Clorox Germicidal bleach was able to reduce 7 log CFU/ml of E. coli O157:H7 after 30 minutes. These studies aim to provide best management practices for small in medium growers in the implementation of antimicrobial solutions for the maintenance of water quality in postharvest washing solutions
People Fever, On the Popular Passions of Peter Watkins' La Commune (Paris 1871)
In this essay I argue that the term ‘people’ has aroused inventive passions in the militant image. I focus my analysis on La Commune (Paris, 1871) by Peter Watkins, a television film that has laid claim to a popular pedigree of sorts. This is a copious film that allows the analysis to approach and interrogate the popular passion of the image and some of its variants. I investigate two main aspects of this case. Firstly, I analyze Watkins’s conception of television as a public service, a conception close to the idea of third television, and its troubled practice in the making of La Commune (Paris, 1871) . Secondly, I focus on what I consider to be the most generative element of the film itself, its attempt to present a collective voice, a ‘voice of the people’. I argue, with the help of Félix Guattari’s critique and proposals for a democratic communication system, that the voices of the film are best listened to as part of a media struggle for collective enunciation
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