The Higgs decay rate to two photons in a model with two fermiophobic-Higgs doublets

We consider a three Higgs doublet model with an $S_3$ symmetry in which beside the SM-like doublet there are two fermiophobic doublets. Due to the new charged scalars there is an enhancement in the two-photon decay while the other channels have the same decay widths that the SM neutral Higgs. The fermiophobic scalars are mass degenerated unless soft terms breaking the $S_3$ symmetry are added.Comment: typos were corrected, the figures have been modified and the conclusions were increased. Still contains 15 pages, 2 figure

Current Algebra in the Path Integral framework

In this letter we describe an approach to the current algebra based in the Path Integral formalism. We use this method for abelian and non-abelian quantum field theories in 1+1 and 2+1 dimensions and the correct expressions are obtained. Our results show the independence of the regularization of the current algebras.Comment: 8 pages, Revtex. One reference added. To appear in Mod. Phys. Lett. A, Vol. 13, No. 27 (1998

On the Orbital Period of the Intermediate Polar 1WGA J1958.2+3232

Recently, Norton et al. 2002, on the basis of multiwavelength photometry of 1WGA J1958.2+3232, argued that the -1 day alias of the strongest peak in the power spectrum is the true orbital period of the system, casting doubts on the period estimated by Zharikov et al. 2001. We re-analyzed this system using our photometric and spectroscopic data along with the data kindly provided by Andy Norton and confirm our previous finding. After refining our analysis we find that the true orbital period of this binary system is 4.35h.Comment: 4 pages, 5 figures, Accepted for publication in A&A Letter

Resonance enhancement of particle production during reheating

We found a consistent equation of reheating after inflation, which shows that for small quantum fluctuations the frequencies of resonance are slighted different from the standard ones. Quantum interference is taken into account and we found that at large fluctuations the process mimics very well the usual parametric resonance but proceed in a different dynamical way. The analysis is made in a toy quantum mechanical model and we discuss further its extension to quantum field theory.Comment: 4 pages, 4 figures(eps), using RevTe

La informalidad empresarial y sus consecuencias: ¿Son los CAE una solución?

Este documento estudia las consecuencias de la informalidad tanto sobre las empresas informales como sobre las formales y analiza el impacto de los Centros de Atención Empresarial (CAE) sobre la creación de empresas en las seis ciudades principales de Colombia. El análisis se desarrolla con base en datos de la Encuesta 123 realizada en el año 2001, el Censo Empresarial de Cali y Yumbo de 2005, la Encuesta de Clima de Inversión realizada en el 2007 por el Banco Mundial, y las series de matrículas mercantiles. Los resultados permiten ver que las empresas informales tienen en promedio menor acceso al crédito y a programas de capacitación, mayores problemas con el servicio técnico y menores utilidades por trabajador que las empresas formales con características similares. Asimismo, se encuentra que la introducción de los CAE incrementó el registro de empresas formales en 5,2%. Abstract: This document studies the consequences of informality over informal and formal firms as well as the impact of the new program for firms´ registration -CAEs- created recently in the six principal cities of Colombia. The analysis uses data from the 2001 Encuesta 123, the 2005 Enterprise Census of Cali and Yumbo, the 2007 Investment Climate Survey and firms´ registration data from the Chambers of Commerce (matrículas mercantiles"). Estimations show that informal firms face on average loweraccess to credit and training programs, higher problems with technical service and lower profits per worker than formal firms. In addition, formal registration of new firms increased by 5.2 percent after the introduction of CAE."Informalidad, informalidad empresarial, Colombia.Informality, firms´ informality, Colombia.

A review of international pharmacy-based minor ailment services and proposed service design model

© 2018 Elsevier Inc. Background: The need to consider sustainable healthcare solutions is essential. An innovative strategy used to promote minor ailment care is the utilisation of community pharmacists to deliver minor ailment services (MASs). Promoting higher levels of self-care can potentially reduce the strain on existing resources. Aim: To explore the features of international MASs, including their similarities and differences, and consider the essential elements to design a MAS model. Methods: A grey literature search strategy was completed in June 2017 to comply with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses standard. This included (1) Google/Yahoo! search engines, (2) targeted websites, and (3) contact with commissioning organisations. Executive summaries, table of contents and title pages of documents were reviewed. Key characteristics of MASs were extracted and a MAS model was developed. Results: A total of 147 publications were included in the review. Key service elements identified included eligibility, accessibility, staff involvement, reimbursement systems. Several factors need to be considered when designing a MAS model; including contextualisation of MAS to the market. Stakeholder engagement, service planning, governance, implementation and review have emerged as key aspects involved with a design model. Conclusion: MASs differ in their structural parameters. Consideration of these parameters is necessary when devising MAS aims and assessing outcomes to promote sustainability and success of the service

Dimensionality reduction via an orthogonal autoencoder approach for hyperspectral image classification

Nowadays, the increasing amount of information provided by hyperspectral sensors requires optimal solutions to ease the subsequent analysis of the produced data. A common issue in this matter relates to the hyperspectral data representation for classification tasks. Existing approaches address the data representation problem by performing a dimensionality reduction over the original data. However, mining complementary features that reduce the redundancy from the multiple levels of hyperspectral images remains challenging. Thus, exploiting the representation power of neural networks based techniques becomes an attractive alternative in this matter. In this work, we propose a novel dimensionality reduction implementation for hyperspectral imaging based on autoencoders, ensuring the orthogonality among features to reduce the redundancy in hyperspectral data. The experiments conducted on the Pavia University, the Kennedy Space Center, and Botswana hyperspectral datasets evidence such representation power of our approach, leading to better classification performances compared to traditional hyperspectral dimensionality reduction algorithms