N = 2 SUSY Abelian Higgs model with hidden sector and BPS equations

In this paper we study a system inspired on certain SUSY breaking models and on more recent Dark Matter scenarios. In our set-up, two Abelian gauge fields interact via an operator that mixes their kinetic terms. We find the extended Supersymmetric version of this system, that also generates a Higgs portal type of interaction. We obtain and study both analytically and numerically, the equations defining topologically stable string-like objects. We check our results using two different approaches.Facultad de Ciencias ExactasInstituto de Física La Plat

N = 2 SUSY Abelian Higgs model with hidden sector and BPS equations

In this paper we study a system inspired on certain SUSY breaking models and on more recent Dark Matter scenarios. In our set-up, two Abelian gauge fields interact via an operator that mixes their kinetic terms. We find the extended Supersymmetric version of this system, that also generates a Higgs portal type of interaction. We obtain and study both analytically and numerically, the equations defining topologically stable string-like objects. We check our results using two different approaches.Facultad de Ciencias ExactasInstituto de Física La Plat

Meningoencefalítis por Angiostrongylus cantonensís Informe de un caso atípico

Human infection due to Angiostrongylus cantonensis is well-known throughout the world as being one of the main causes of eosinophilic meningoencephalitis. The present report corresponds to a clinical and anatomopathological study of a patient from the General Calixto García Hospital in Havana, who died from a neurological infection with torpid evolution. Autopsy revealed the presence of this parasite in the brain and lungs. Clinical laboratory tests did not show an eosinophile increase in blood or cerebrospinal fluid. The low frequency of this human parasitic disease in Cuba, as well as its unusual clinical presentation, prompted us to present this atypical report.La infección humana por Angiostrongylus cantonensis es conocida mundialmente como una de las principales causas de meningoencefalitis eosinofílica. Este informe corresponde al estudio clinico y anatomopatológico de un paciente fallecido en el Hospital General Calixto García de La Habana, con un cuadro de infección neurológica de evolución tórpida y en el que la autopsia demostró la presencia de este parásito en cerebro y pulmón. Los análisis de laboratorio clínico no revelaron aumento de los eosinófilos en la sangre ni en el líquido cefalorraquídeo. La escasa frecuencia, en nuestro medio, de este parasitismo en el hombre y, sobre todo, su presentación clínica atípica motivaron su información

Loop Corrections and Bosonization Formulae

We study the functional integrals that appear in a path integral bosonization procedure for more than two spacetime dimensions. Since they are not in general exactly solvable, their evaluation by a suitable loop expansion would be a natural procedure, even if the exact fermionic determinant were known. The outcome of our study is that we can consistently ignore loop corrections in the functional integral defining the bosonized action, if the same is done for the functional integral corresponding to the bosonic representation of the generating functional. If contributions up to some orderlin the number of loops are included in both integrals, all but the lowest terms cancel out in the final result for the generating functional.Facultad de Ciencias Exacta

Esquema de ordenamiento de desarrollo urbano para el municipio de Telpaneca, departamento de Madriz, 2015-2030

El estudio presenta un esquema de ordenamiento de desarrollo urbano para el municipio de Telpaneca, departamento de Madriz, 2015-2030. Contempla una perspectiva de desarrollo para el municipio, al definir las premisas de gestión para potenciar el uso racional de los recursos naturales, físicos, humanos, financieros y técnicos, además de ser un instrumento de apoyo enfocado en una visión de utilidad para las instituciones u organizaciones con interés en el tema

Uniqueness of Bogomol'nyi equations and Born-Infeld like supersymmetric theories

We discuss Bogomol’nyi equations for general gauge theories (depending on the two Maxwell invariants FµνFµν and F˜µνFµν) coupled to Higgs scalars. By analysing their supersymmetric extension, we explicitly show why the resulting BPS structure is insensitive to the particular form of the gauge Lagrangian: Maxwell, Born-Infeld or more complicated non-polynomial Lagrangians all satisfy the same Bogomol’nyi equations and bounds which are dictated by the underlying supersymmetry algebra.Facultad de Ciencias Exacta

Electrically charged vortex solution in Born-Infeld theory

We obtain electrically charged vortex solutions for the Born-Infeld Higgs system with a Chern Simons term. We analyse numerically these solutions, comparing their properties with those of “normal” Nielsen-Olesen vortices and also show that no charged vortex solutions exist in BornInfeld theory when the Chern Simons term is absent.Facultad de Ciencias Exacta

La insuficiencia de conocimientos para el diagnóstico microscópico de la malaria en técnicos de la red de laboratorios de Luanda, Angola

Introduction: Malaria is still one of the most important public health problems worldwide. The diagnosis of this disease is still mainly based on thick blood films. Objective: To evaluate the knowledge about malaria diagnosis of the technicians of the public health network in Luanda, Angola, by means of a survey. Materials and methods: This survey was carried out in three phases. In the first one, open interviews were done to technicians related with the different procedures for malaria diagnosis. In the second one, a preliminary questionnaire was prepared and evaluated. In the third phase, a definitive questionnaire was applied to 120 technicians from Luanda between April and July, 2013. The proportions of correct and incorrect answers were compared for every question of the survey. Results: Significantly higher proportions of incorrect answers (p<0.05) were found in the questions related to clinical manifestations, 68/52 (p<0.05), species of Plasmodium according to geographical areas, 76/44 (p<0.05), the type of granulations according to species, 96/24 (p<0.01), the class of microscope magnifying glasses used to observe the thick smear, 105/15 (p<0.01), the thick smear report, 76/44 (p<0.01), the time and preparation of different stain solutions, 81/39 (p<0.01), and the number of parasites counted per 200 leukocytes, 96/24 (p<0.01). Conclusions: Various failures for the microscopic diagnosis of malaria were observed amongst the evaluated technicians. These results will be useful as a baseline study before applying an educational intervention aimed to improve the quality of malaria diagnosis in Luanda’s laboratory network.Introducción. La malaria, o paludismo, continúa siendo uno de los más importantes problemas de salud pública a nivel mundial. La gota gruesa sigue siendo la técnica de referencia para su diagnóstico.Objetivo. Evaluar los conocimientos para el diagnóstico de la malaria de técnicos del sector de la salud en Luanda, Angola, mediante una encuesta.Materiales y métodos. La preparación de la encuesta transcurrió en tres etapas: primero, se hicieron entrevistas abiertas a los técnicos en torno a los diferentes procedimientos para el diagnóstico microscópico de la malaria; en una segunda etapa, se preparó el cuestionario preliminar, y en la tercera, se elaboró el cuestionario definitivo. La encuesta se hizo en un grupo de 120 técnicos de la red nacional de salud entre los meses de abril y julio de 2013. Se comparó la proporción de respuestas correctas e incorrectas considerando como significativo un valor de p<0,05.Resultados. Las respuestas incorrectas predominaron sobre las correctas, de forma estadísticamente significativa (p<0,05), en las preguntas sobre: las manifestaciones clínicas (68 Vs. 52); las especies de Plasmodium según zonas geográficas (76 Vs. 44); el tipo de granulaciones según la especie parasitaria (96 Vs. 24); el tipo de lente para visualizar la gota gruesa (105 Vs. 15); la forma de hacer un informe del resultado de la microscopía (76 Vs. 44); el tiempo y la concentración de las diferentes soluciones que se utilizan (81 Vs. 39), y el número de parásitos por 200 leucocitos (96 Vs. 24).Conclusiones. Se demostró la insuficiencia de conocimientos para el diagnóstico microscópico de la malaria. Estos resultados servirán de base para el desarrollo de las herramientas de una intervención educativa orientada a mejorar la calidad del diagnóstico de la malaria en la red de laboratorios de Luanda