Lepton Number Violating Radiative WW Decay in Models with R-parity Violation

Models with explicit R-parity violation can induce new rare radiative decay modes of the $W$ boson into single supersymmetric particles which also violate lepton number. We examine the rate and signature for one such decay, $W\rightarrow \tilde l\gamma$, and find that such a mode will be very difficult to observe, due its small branching fraction, even if the lepton number violating coupling in the superpotential is comparable in strength to electromagnetism. This parallels a similar result obtained earlier by Hewett in the case of radiative $Z$ decays.Comment: 10 pages, 2 figures(available on request), LaTex, ANL-HEP-PR-92-8

Natural language processing for mimicking clinical trial recruitment in critical care: a semi-automated simulation based on the LeoPARDS trial

Clinical trials often fail to recruit an adequate number of appropriate patients. Identifying eligible trial participants is resource-intensive when relying on manual review of clinical notes, particularly in critical care settings where the time window is short. Automated review of electronic health records (EHR) may help, but much of the information is in free text rather than a computable form. We applied natural language processing (NLP) to free text EHR data using the CogStack platform to simulate recruitment into the LeoPARDS study, a clinical trial aiming to reduce organ dysfunction in septic shock. We applied an algorithm to identify eligible patients using a moving 1-hour time window, and compared patients identified by our approach with those actually screened and recruited for the trial, for the time period that data were available. We manually reviewed records of a random sample of patients identified by the algorithm but not screened in the original trial. Our method identified 376 patients, including 34 patients with EHR data available who were actually recruited to LeoPARDS in our centre. The sensitivity of CogStack for identifying patients screened was 90% (95% CI 85%, 93%). Of the 203 patients identified by both manual screening and CogStack, the index date matched in 95 (47%) and CogStack was earlier in 94 (47%). In conclusion, analysis of EHR data using NLP could effectively replicate recruitment in a critical care trial, and identify some eligible patients at an earlier stage, potentially improving trial recruitment if implemented in real time

Caracterização dos agroecossistemas e manejo de germoplasma de Citrullus em três regiões do Nordeste brasileiro.

Sendo assim, este trabalho teve como objetivos caracterizar, estudar e descrever os agroecossistemas nordestinos representados pelos distritos de Jamarí-MA, Massaroca-BA e Urimamã-PE

Estudo da dispersao da variabilidade fenotipica em populacoes de melancia (Citrullus lanatus) provenientes de tres regioes do NE do Brasil.

Ha pouca informacao basica sobre a melancia tradicionalmente cultivada no NE. Isto dificulta o estabelecimento de uma estrategia racional de coleta e manejo desses recursos geneticos. Objetivando avaliar a variabilidade fenotipica em melancia existente entre 39 populacoes e dentro de tres regioes (Medio Sertao Maranhense, Depressao Sertaneja, Regiao Central da Bahia) no Nordeste brasileiro e comparar o padrao de dispersao das populacoes destas regioes foi realizado ensaio de caracterizacao utilizando uma lista de 17 descritores. As analises de variancia foram realizadas de acordo com o delineamento experimental de blocos ao acaso com quatro repeticoes, sendo 39 trat, 13 por regiao. para comparar as populacoes com base em todas as variaveis quantitativas avaliadas, foi usada a analise canonica discriminante e classificaram-se as populacoes por regioes. Por outro lado, ha uma diferenciada distribuicao da variabilidade entre as regioes qeu estao relacionadas a padroes de natureza historica e biologica. Desse modo a coleta de germoplasma deve ter como criterio basico a regiao geografica.Suplemento. Edição dos Resumos do 42. Congresso Nacional de Genética, Caxambu, MG, set. 1996

The dilaton-dominated supersymmetry breaking scenario in the context of the non-minimal supersymmetric model

The phenomenological consequences of the dilaton-type soft supersymmetry breaking terms in the context of the next to minimal supersymmetric standard model are investigated. We always find a very low top quark mass. As a consequence such string vacua are excluded by recent experimental results. The viability of the solution of the $\mu$ term through the introduction of a gauge singlet field is also briefly discussed.Comment: 10 pages,LATE

Leptonic CP Violation in Supersymmetric Standard Model

We point out the possibility of spontaneous and hard CP-violation in the scalar potential of R-parity broken supersymmetric Standard Model. The existence of spontaneous CP-violation depends crucially on the R-parity breaking terms in the superpotential and, in addition, on the choice of the soft supersymmetry breaking terms. Unlike in theories with R-parity conservation, it is natural, in the context of the present model, for the sneutrinos to acquire (complex) vacuum expectation values. In the context of this model we examine here the global implications, like the strength of the CP-violating interactions and the neutrino masses.Comment: REVTEX, 15 page

Adiabatic limit and the slow motion of vortices in a Chern-Simons-Schr\"odinger system

We study a nonlinear system of partial differential equations in which a complex field (the Higgs field) evolves according to a nonlinear Schroedinger equation, coupled to an electromagnetic field whose time evolution is determined by a Chern-Simons term in the action. In two space dimensions, the Chern-Simons dynamics is a Galileo invariant evolution for A, which is an interesting alternative to the Lorentz invariant Maxwell evolution, and is finding increasing numbers of applications in two dimensional condensed matter field theory. The system we study, introduced by Manton, is a special case (for constant external magnetic field, and a point interaction) of the effective field theory of Zhang, Hansson and Kivelson arising in studies of the fractional quantum Hall effect. From the mathematical perspective the system is a natural gauge invariant generalization of the nonlinear Schroedinger equation, which is also Galileo invariant and admits a self-dual structure with a resulting large space of topological solitons (the moduli space of self-dual Ginzburg-Landau vortices). We prove a theorem describing the adiabatic approximation of this system by a Hamiltonian system on the moduli space. The approximation holds for values of the Higgs self-coupling constant close to the self-dual (Bogomolny) value of 1. The viability of the approximation scheme depends upon the fact that self-dual vortices form a symplectic submanifold of the phase space (modulo gauge invariance). The theorem provides a rigorous description of slow vortex dynamics in the near self-dual limit.Comment: Minor typos corrected, one reference added and DOI give

Coleta de germoplasma de cucurbita mochata e cucurbita maxima em duas regioes do Nordeste brasileiro.

A diversidade edafoclimatica, cultural e socio-economica no Nordeste brasileiro permite a selecao de varios genes uteis em especies vegetais. Contudo, existe alta probabilidade de perda desses genes. Entre as especies cultivadas estao a abobora (C.moschata) e o jerimum (C.maxima). Efetivaram-se duas expedicoes (Irece-Bahia/e Pastos Bons-Maranhao). Os acessos e o manejo das sementes pelos agricultores foram documentados. Coletaram-se 206 acessos de abobora e 60 de jerimum com grande variabilidade de frutos alguns dos quais semelhantes as variedades comerciais. Espera-se ter coletado genes para resistencia a doencas. Os resultados mostram que coletas sistematicas devem continuar

A Supersymmetric Solution to the Solar and Atmospheric Neutrino Problems

The simplest unified extension of the Minimal Supersymmetric Standard Model with bi-linear R--Parity violation provides a predictive scheme for neutrino masses which can account for the observed atmospheric and solar neutrino anomalies in terms of bi-maximal neutrino mixing. The maximality of the atmospheric mixing angle arises dynamically, by minimizing the scalar potential, while the solar neutrino problem can be accounted for either by large or by small mixing oscillations. One neutrino picks up mass by mixing with neutralinos, while the degeneracy and masslessness of the other two is lifted only by loop corrections. Despite the smallness of neutrino masses R-parity violation is observable at present and future high-energy colliders, providing an unambiguous cross-check of the model.Comment: 5 pages, final version published in Phys. Rev. D61, 2000, 071703(R

Fluoranthene Biodegradation by Serratia sp. AC-11 Immobilized into chitosan beads.

Made available in DSpace on 2019-05-17T00:36:14Z (GMT). No. of bitstreams: 1 Garcia2019ArticleFluorantheneBiodegradationBySe.pdf: 1267419 bytes, checksum: 094d19559ecfcf475161e3554b5afecb (MD5) Previous issue date: 2019bitstream/item/197400/1/Garcia2019-Article-FluorantheneBiodegradationBySe.pd