Vertex Operator Representation of the Soliton Tau Functions in the An(1)A_n^{(1)} Toda Models by Dressing Transformations

We study the relation between the group-algebraic approach and the dressing symmetry one to the soliton solutions of the $A_n^{(1)}$ Toda field theory in 1+1 dimensions. Originally solitons in the affine Toda models has been found by Olive, Turok and Underwood. Single solitons are created by exponentials of elements which ad-diagonalize the principal Heisenberg subalgebra. Alternatively Babelon and Bernard exploited the dressing symmetry to reproduce the known expressions for the fundamental tau functions in the sine-Gordon model. In this paper we show the equivalence between these two methods to construct solitons in the $A_n^{(n)}$ Toda models.Comment: 35 pages, LaTe

Early indication of decompensated heart failure in patients on home-telemonitoring: a comparison of prediction algorithms based on daily weight and noninvasive transthoracic bio-impedance

Background: Heart Failure (HF) is a common reason for hospitalization. Admissions might be prevented by early detection of and intervention for decompensation. Conventionally, changes in weight, a possible measure of fluid accumulation, have been used to detect deterioration. Transthoracic impedance may be a more sensitive and accurate measure of fluid accumulation. Objective: In this study, we review previously proposed predictive algorithms using body weight and noninvasive transthoracic bio-impedance (NITTI) to predict HF decompensations. Methods: We monitored 91 patients with chronic HF for an average of 10 months using a weight scale and a wearable bio-impedance vest. Three algorithms were tested using either simple rule-of-thumb differences (RoT), moving averages (MACD), or cumulative sums (CUSUM). Results: Algorithms using NITTI in the 2 weeks preceding decompensation predicted events (P<.001); however, using weight alone did not. Cross-validation showed that NITTI improved sensitivity of all algorithms tested and that trend algorithms provided the best performance for either measurement (Weight-MACD: 33%, NITTI-CUSUM: 60%) in contrast to the simpler rules-of-thumb (Weight-RoT: 20%, NITTI-RoT: 33%) as proposed in HF guidelines. Conclusions: NITTI measurements decrease before decompensations, and combined with trend algorithms, improve the detection of HF decompensation over current guideline rules; however, many alerts are not associated with clinically overt decompensation

Human mucocutaneous leishmaniasis in Três Braços, Bahia - Brazil : an area of Leishmania braziliensis braziliensis transmission. I. laboratory diagnosis

Foram analisados os dados clínicos de 182 pacientes com leishmaniose cutânea, provavelmente causada por Leishmania braziliensis braziliensis. Sessenta e oito por cento apresentavam uma única lesão, usualmente uma úlcera, na terça parte inferior anterior da tíbia. Todos os grupos etários estavam representados e muitos apresentaram histórico de um a dois meses. Treze por cento apresentavam lesões fechadas de natureza verrucosa ou em placa. Após tratamento, a evolução destas lesões foi relacionada à regularidade da terapia por antimônio. Embora a cura usualmente ocorresse em três meses, o tempo de cicatrização, após o início de tratamento, foi variável e relativo ao tamanho da lesão (p < 0.01). Em geral a lesão fechava quando era dado suficiente antimônio como tratamento. Sete entre dez pacientes que apresentavam teste cutâneo negativo para leishmania tomavam positivos após o tratamento. Observou-se por fluorescência indireta, um declínio significante nos títulos de anticorpos em pacientes acompanhados durante e após a terapia. _______________________________________________________________________________ ABSTRACTThe clinical records of 182 patients with cutaneous leishmaniasis probably due to Leishmania braziliensis braziliensis are analysed. 68% had a single lesion which was usually an ulceron the lower anterior tibial third. Many had short histories of one to two months and all age groups were represented 13% had closed lesions of a verrucose or plaque like nature. Evolution of these skin lesions after treatment was related to the regularity of antimony therapy. Although healing usually occurred in three months, the time to scarring after commencing treatment was variable and related to the size ofthe lesion (p < 0.01). Usually if sufficient antimony treatment was given the lesion closed. Seven of the ten patients with initially negative leishmanin skin tests converted to positive after treatment. A significant decline of indirect fluorescent antibody titres occurred in patients followed, during and after therapy

A AMIZADE POLÍTICA DE IDOSOS VOLUNTÁRIOS

Resumo O objetivo deste artigo é discutir a relevância da amizade política para idosos colaboradores, apesar da valorização do individualismo na era moderna. A dimensão política da amizade foi encontrada na pesquisa que realizei , fundamentada na teoria política de Hannah Arendt. A amizade política constitui uma possibilidade para manter o idoso atualizado e interessado nos problemas sociais. Nesse sentido, pode se associar a outros idosos e outras gerações para lutarem pela realização dos seus direitos

A Mathematical Framework for Agent Based Models of Complex Biological Networks

Agent-based modeling and simulation is a useful method to study biological phenomena in a wide range of fields, from molecular biology to ecology. Since there is currently no agreed-upon standard way to specify such models it is not always easy to use published models. Also, since model descriptions are not usually given in mathematical terms, it is difficult to bring mathematical analysis tools to bear, so that models are typically studied through simulation. In order to address this issue, Grimm et al. proposed a protocol for model specification, the so-called ODD protocol, which provides a standard way to describe models. This paper proposes an addition to the ODD protocol which allows the description of an agent-based model as a dynamical system, which provides access to computational and theoretical tools for its analysis. The mathematical framework is that of algebraic models, that is, time-discrete dynamical systems with algebraic structure. It is shown by way of several examples how this mathematical specification can help with model analysis.Comment: To appear in Bulletin of Mathematical Biolog

Ciencia de datos aplicada al estudio la fauna íctica en la zona del Río Paraná

El constante crecimiento del volumen de información es transversal a todos los ámbitos de nuestra vida cotidiana y hacen necesaria la utilización de nuevos métodos y enfoques analíticos que nos permitan navegar entre el volumen de información que se genera día a día y nos brinde la posibilidad de extraer conocimiento útil u oculto en esa gran cantidad de datos. La ciencia de datos, minería de datos o descubrimiento de conocimiento, son términos que tienen una amplia trayectoria y una gran cantidad de estudios realizados. En contraparte, en el ámbito biológico, existe una gran cantidad de estudios sobre la comunidad y dinámica de la fauna íctica; pero no se ha localizado ningún estudio específico que unifique las dos áreas. El presente trabajo propone la aplicación de técnicas de Ciencia de Datos a un set de información que describe el monitoreo de la fauna íctica en un tramo del Río Paraná. El objetivo es poder determinar y entender las relaciones entre variables biológicas y ambientales e intentar descubrir comportamientos no apreciables a simple vista. El resultado de este trabajo será un aporte al Proyecto de Biología Pesquera Regional y a través de ellos, a las entidades que toman decisiones y gestionan los recursos para la conservación y preservación de la fauna íctica en el río Paraná.Eje: Bases de Datos y Minería de Datos.Red de Universidades con Carreras en Informátic

Epidemiological investigation of an acute case of Chagas disease in an area of active transmission in Peruvian Amazon region

The study objective was to investigate an acute case of Chagas disease in the San Pedro de Shishita community, Pebas District, in the Peruvian Amazon basin, a non-endemic area. Both parents of the index case (acute case) were thoroughly interviewed, a seroepidemiological survey was carried out in the community, parasitological exams were carried out only in relatives of the index case, and triatomine bugs were searched for inside houses, peridomiciliary, and in wild environments. Seroprevalence for IgG anti-T. cruzi antibodies was 1/104 (0.96%), using an ELISA test and an indirect immunofluorescence assay. Panstrongylus geniculatus and Rhodnius pictipes adults were found. The index case is autochthonous from San Pedro de Shishita, but the source of transmission is unknown.O objetivo deste trabalho foi estudar caso da doença de Chagas aguda na comunidade indígena de San Pedro de Shishita, sem conhecimento da origem da transmissão. San Pedro de Shishita, distrito Pebas, região da Amazônia peruana é uma área não endêmica. Foram entrevistados os pais do paciente e feito inquérito soroepidemiológico dos participantes e estudos parasitológicos da família e procurou-se também triatomíneos no ambiente doméstico, peridomiciliar e silvestre. A soroprevalência de anticorpos IgG anti-T. cruzi foi 1/ 104 (0,96%) por ELISA e imunofluorescência indireta. Foram encontrados adultos de Panstrongylus geniculatus e Rhodnius pictipe

Charged Higgs in 3-3-1 Model Through e−e+e^-e^+ Collisions

In this work we present an analysis of production and signature of charged Higgs bosons $H_2^{\pm}$ in the version of the 3-3-1 model containing heavy leptons at the CLIC (Cern Linear Collider). The production rate is found to be significant for the direct production of $e^{-} e^{+} \rightarrow H_{2}^{+} H_{2}^{-}$. We also studied the possibility to identify it using their respective branching ratios.Comment: 16 pages, 9 Figures. arXiv admin note: substantial text overlap with arXiv:1408.5944; text overlap with arXiv:1311.0845, arXiv:1205.404