Screening length and the direction of plasma winds

We study the screening length of a heavy quark-antiquark pair in strongly coupled gauge theory plasmas flowing at velocity v following a proposal by Liu, Rajagopal, and Wiedemann. We analyze the screening length as the direction of the plasma winds vary. To leading order in v, this angle-dependence can be studied analytically for many theories by extending our previous formalism. We show that the screening length is locally a minimum (maximum) when the pair is perpendicular (parallel) to the plasma winds, which has been observed for the N=4 plasma. Also, we compare AdS/CFT results with weak coupling ones, and we discuss the subleading dependence on v for the Dp-brane.Comment: 20 pages, 4 figures, JHEP3; v2: discussion added and modifie

Analyzing First-Person Stories Based on Socializing, Eating and Sedentary Patterns

First-person stories can be analyzed by means of egocentric pictures acquired throughout the whole active day with wearable cameras. This manuscript presents an egocentric dataset with more than 45,000 pictures from four people in different environments such as working or studying. All the images were manually labeled to identify three patterns of interest regarding people's lifestyle: socializing, eating and sedentary. Additionally, two different approaches are proposed to classify egocentric images into one of the 12 target categories defined to characterize these three patterns. The approaches are based on machine learning and deep learning techniques, including traditional classifiers and state-of-art convolutional neural networks. The experimental results obtained when applying these methods to the egocentric dataset demonstrated their adequacy for the problem at hand.Comment: Accepted at First International Workshop on Social Signal Processing and Beyond, 19th International Conference on Image Analysis and Processing (ICIAP), September 201

Emerging Regulatory Experiments in Permit Process Coordination for Endangered Species and Aquatic Resources in California

The interconnected relationship between California’s wetlands and endangered species has spurred recent efforts to coordinate endangered species permitting under federal and state endangered species laws with freshwater aquatic resource permits under the federal Clean Water Act and analogous state laws. The University of California, Irvine School of Law Center for Land, Environment, and Natural Resources surveyed these emerging permit coordination efforts among several proposed and existing California Habitat Conservation Plans/Natural Community Conservation Plans. This Article explores these nascent initiatives, including the coordinating tools they have tested, the anticipated benefits, and the already observed challenges. Preliminary evidence suggests that clearer guidance from federal agency headquarters, building on recent Presidential interagency initiatives in infrastructure permitting, would likely provide the best opportunity to promote beneficial permit coordination while minimizing potential drawbacks

A silence black hole: Hawking radiation at the Hagedorn temperature

We compute semi-classically the Hawking emission for different types of black hole in type II string theory. In particular we analyze the thermal transition between NS5 branes and Little String Theory, finding compelling evidence for information recovering. We find that once the near horizon limit is taken the emission of a full family of models is exactly thermal even if back-reaction is taken into account. Consequently these theories are non-unitary and can not convey any information about the black hole internal states. It is argue that this behaviour matches the string theory expectations. We suggest a plausible reason for the vanishing of the jet-quenching parameter in such theories.Comment: 18 pages, harvma

Drag force in a string model dual to large-N QCD

We compute the drag force exerted on a quark and a di-quark systems in a background dual to large-N QCD at finite temperature. We find that appears a drag force in the former setup with flow of energy proportional to the mass of the quark while in the latter there is no dragging as in other studies. We also review the screening length.Comment: 15 pages, typos removed, error corrected, refs adde

Amortiguación de la fluorescencia del carbazol por alcaloides tropánicos (I)

La desactivación de la fluorescencia del carbazol por alcaloides tropánicos en ciclohexano ha sido estudiada en estado estacionario. Los resultados obtenidos indican la formación de un complejo por enlace de hidrógeno tanto en el estado fundamental como en el excitado. Los valores de las constantes de equilibrio son Kg = 18.0 M-1 y 158 < Ke < 430 M-1 para el estado fundamental y el excitado respectivamente.The fluorescence quenching of carbazole by tropanic alkaloids in ciclohexane has been studied in the steady-state. The results obtained supports hydrogen-bond formation both in the ground and excited states. The values of the equilibrium constants are Kg = 18.0 M-1 y 158 < Ke < 430 M-1 both for the ground and excited states respectively

Amortiguación de la fluorescencia del carbazol por alcaloides tropánicos (I)

The fluorescence quenching of carbazole by tropanic alkaloids in ciclohexane has been studied in the steady-state. The results obtained supports hydrogen-bond formation both in the ground and excited states. The values of the equilibrium constants are Kg 18.0 M-1 Y 158 &lt; Ke &lt; 430 M-1 both for the ground and excited states respectively.La desactivación de la fluorescencia del carbazol por alcaloides tropánicos en ciclohexano ha sido estudiada en estado estacionario. Los resultados obtenidos indican la formación de un complejo por enlace de hidrógeno tanto en el estado fundamental como en el excitado. Los valores de las constantes de equilibrio son Kg = 18.0 M-1 y 158 &lt; Ke &lt; 430 M-1 para el estado fundamental y el excitado respectivamente