Questing one Brazilian query: reporting 16 cases of Q fever from Minas Gerais, Brazil

Q fever has been considered non-existing in Brazil where reports of clinical cases still cannot be found. This case-series of 16 patients is a result of a systematic search for such illness by means of clinical and serologic criteria. Serologic testing was performed by the indirect microimmunofluorescence technique using phase I/II C. burnetii antigens. Influenza-like syndrome was the most frequent clinical form (eight cases - 50%), followed by pneumonia, FUO (fever of unknown origin), mono-like syndrome (two cases - 12.5% each), lymphadenitis (one case - 6.3%) and spondylodiscitis associated with osteomyelitis (one case - 6.3%). The ages varied from four to 67 years old with a median of 43.5. All but one patient had positive serologic tests for phase II IgG whether or not associated with IgM positivity compatible with acute infection. One patient had both phase I and phase II IgG antibodies compatible with chronic Q fever. Seroconvertion was detected in 10 patients. Despite the known limitations of serologic diagnosis, the cases here reported should encourage Brazilian doctors to include Q fever as an indigenous cause of febrile illness.

Strange Dynamics in a Fractional Derivative of Complex-Order Network of Chaotic Oscillators

We study the peculiar dynamical features of a fractional derivative of complex-order network. The network is composed of two unidirectional rings of cells, coupled through a "buffer" cell. The network has a Z3 × Z5 cyclic symmetry group. The complex derivative Dα±jβ, with α, β ∈ R+ is a generalization of the concept of integer order derivative, where α = 1, β = 0. Each cell is modeled by the Chen oscillator. Numerical simulations of the coupled cell system associated with the network expose patterns such as equilibria, periodic orbits, relaxation oscillations, quasiperiodic motion, and chaos, in one or in two rings of cells. In addition, fixing β = 0.8, we perceive differences in the qualitative behavior of the system, as the parameter c ∈ [13, 24] of the Chen oscillator and/or the real part of the fractional derivative, α ∈ {0.5, 0.6, 0.7, 0.8, 0.9, 1.0}, are varied. Some patterns produced by the coupled system are constrained by the network architecture, but other features are only understood in the light of the internal dynamics of each cell, in this case, the Chen oscillator. What is more important, architecture and/or internal dynamics?

Analysis of Natural and Artificial Phenomena Using Signal Processing and Fractional Calculus

In this paper we study several natural and man-made complex phenomena in the perspective of dynamical systems. For each class of phenomena, the system outputs are time-series records obtained in identical conditions. The time-series are viewed as manifestations of the system behavior and are processed for analyzing the system dynamics. First, we use the Fourier transform to process the data and we approximate the amplitude spectra by means of power law functions. We interpret the power law parameters as a phenomenological signature of the system dynamics. Second, we adopt the techniques of non-hierarchical clustering and multidimensional scaling to visualize hidden relationships between the complex phenomena. Third, we propose a vector field based analogy to interpret the patterns unveiled by the PL parameters.

Matrix fractional systems

This paper addresses the matrix representation of dynamical systems in the perspective of fractional calculus. Fractional elements and fractional systems are interpreted under the light of the classical Cole–Cole, Davidson–Cole, and Havriliak–Negami heuristic models. Numerical simulations for an electrical circuit enlighten the results for matrix based models and high fractional orders. The conclusions clarify the distinction between fractional elements and fractional systems.

Fractional State Space Analysis of Temperature Time Series

Atmospheric temperatures characterize Earth as a slow dynamics spatiotemporal system, revealing long-memory and complex behavior. Temperature time series of 54 worldwide geographic locations are considered as representative of the Earth weather dynamics. These data are then interpreted as the time evolution of a set of state space variables describing a complex system. The data are analyzed by means of multidimensional scaling (MDS), and the fractional state space portrait (fSSP). A centennial perspective covering the period from 1910 to 2012 allows MDS to identify similarities among different Earth’s locations. The multivariate mutual information is proposed to determine the “optimal” order of the time derivative for the fSSP representation. The fSSP emerges as a valuable alternative for visualizing system dynamics.

Visualizing control systems performance: A fractional perspective

This article presents a novel method for visualizing the control systems behavior. The proposed scheme uses the tools of fractional calculus and computes the signals propagating within the system structure as a time/frequency-space wave. Linear and nonlinear closed-loop control systems are analyzed, for both the time and frequency responses, under the action of a reference step input signal. Several nonlinearities, namely, Coulomb friction and backlash, are also tested. The numerical experiments demonstrate the feasibility of the proposed methodology as a visualization tool and motivate its extension for other systems and classes of nonlinearities.

Audição harmónica: importância e estratégias para um desenvolvimento auditivo integral

O presente relatório insere-se no âmbito da unidade curricular de Prática de Ensino Supervisionada. É um trabalho individual de síntese e de reflexão fundamentada sobre o percurso realizado no estágio, e de investigação com vista à resolução de problemas e conhecimento da realidade das práticas educativas do sistema de ensino especializado de música. Deste modo, é definido o quadro contextual sobre a evolução deste sistema de ensino e as complexidades que o têm caraterizado, o desenvolvimento curricular, particularmente o lugar que a disciplina de Formação Musical ocupa no currículo, e o Conservatório de Música de Paredes. Sobre o percurso formativo desempenhado nesta instituição educativa e sobre os dados recolhidos da observação naturalista não participante das aulas de duas turmas do ensino articulado, é elaborada uma reflexão crítica fundamentada, relativamente a todos os processos didáticos e pedagógicos. Complementarmente é apresentado um projeto de investigação qualitativa realizado no âmbito da unidade curricular de Seminário de Investigação em ensino de Música, tendo em vista a contribuição para uma prática pedagógica mais enriquecida, informada e fundamentada. O objeto de estudo está relacionado com a área disciplinar de Formação Musical, sob o tema Audição Harmónica: importância e estratégias para um desenvolvimento auditivo integral. Os objetivos do projeto visam verificar: i) quais os recursos utilizados e as estratégias e metodologias de ensino praticadas nas aulas de Formação Musical para o desenvolvimento da audição harmónica; ii) quais os objetivos e conteúdos contemplados nos programas da mesma disciplina; iii) que atividades são sugeridas em alguns manuais de Formação Musical. Os dados obtidos permitiram verificar que, apesar da importância atribuída à audição harmónica na formação de músicos, esta competência representa uma das maiores dificuldades dos alunos e, no âmbito da Formação Musical, há pouca diversidade de vivências, experiências musicais e outras atividades contextualizadas musicalmente.

QUANTITATIVE REAL-TIME PCR (Q-PCR) FOR SPUTUM SMEAR DIAGNOSIS OF PULMONARY TUBERCULOSIS AMONG PEOPLE WITH HIV/AIDS

Objective: To assess quantitative real-time polymerase chain reaction (q-PCR) for the sputum smear diagnosis of pulmonary tuberculosis (PTB) in patients living with HIV/AIDS with a clinical suspicion of PTB.Method: This is a prospective study to assess the accuracy of a diagnostic test, conducted on 140 sputum specimens from 140 patients living with HIV/AIDS with a clinical suspicion of PTB, attended at two referral hospitals for people living with HIV/AIDS in the city of Recife, Pernambuco, Brazil. A Löwenstein-Jensen medium culture and 7H9 broth were used as gold standard.Results: Of the 140 sputum samples, 47 (33.6%) were positive with the gold standard. q-PCR was positive in 42 (30%) of the 140 patients. Only one (0.71%) did not correspond to the culture. The sensitivity, specificity and accuracy of the q-PCR were 87.2%, 98.9% and 95% respectively. In 39 (93%) of the 42 q-PCR positive cases, the CT (threshold cycle) was equal to or less than 37.Conclusion: q-PCR performed on sputum smears from patients living with HIV/AIDS demonstrated satisfactory sensitivity, specificity and accuracy, and may therefore be recommended as a method for diagnosing PTB.

Infliximab in Recalcitrant Generalized Pustular Arthropatic Psoriasis

Generalized pustular psoriasis is an unstable inflammatory type of psoriasis, with widespread areas of erythema and sterile pustules, associated with fever and systemic symptoms. Infliximab is a monoclonal antibody with anti-TNFalpha activity, approved for use in psoriasis. We describe a male patient with a long history of stable arthropathic psoriasis, hospitalized with a generalized pustular psoriasis and acute exacerbation of articular complaints. The disease was resistant to multiple therapies (acitretin, methotrexate and corticosteroids), so the patient was started on infliximab, with a very rapid response of both cutaneous and articular symptoms. He had complete clearing of lesions at week 12, and marked improvement of the articular symptoms. No recurrence occurred at 8 months of follow-up with infliximab every 8 weeks. Infliximab had an extremely rapid therapeutic action response on a recalcitrant generalized pustular psoriasis. The articular response was also excellent, with significant improvement of quality of life.

Camelid nanobodies raised against an integral membrane enzyme, nitric oxide reductase

Protein Sci. 2009 Mar;18(3):619-28. doi: 10.1002/pro.69.

An RF LC Q-enhanced CMOS iter using integrated inductors with layout optimization

Dissertação apresentada para obtenção do Grau de Mestre em Engenharia Electrotécnica e de Computadores, pela Universidade Nova de Lisboa, Faculdade de Ciências e Tecnologia

Programa ACHEI: Atenção ao Chagásico com Educação Integral no Município de Maringá e Região Noroeste do Paraná, Brasil

Participaram deste trabalho 131 pacientes chagásicos procedentes de diferentes áreas endêmicas atendidos pelo Laboratório de Doença de Chagas da Universidade Estadual de Maringá (UEM). Estes pacientes descobriram que estavam infectados principalmente porque apresentaram sintomatologia (58,1%) ou porque se dispuseram a doar sangue (29,4%). Durante o tratamento etiológico contra o Trypanosoma cruzi,45,2% apresentaram queixas relacionadas a efeitos colaterais do benznidazol. Com base nestes dados foi criado o Programa ACHEI: Atenção ao Chagásico com Educação Integral. Implantado como um projeto de extensão, tem caráter multiprofissional/interdisciplinar. Foi programado com uma reunião mensal composta de uma primeira parte informativa específica, quando é também distribuído um folder explicando transmissão, sintomatologia e tratamento da doença de Chagas. Na segunda parte é trabalhado o apoio psico-social, enfocando auto-estima e cidadania. É um espaço onde pacientes chagásicos podem compartilhar com seus iguais a dúvida sobre a sua qualidade de vida após o diagnóstico, o medo, a ansiedade, o estigma, o diagnóstico positivo e a convivência com a família/grupo social criando a oportunidade e ambiente para que cada paciente reflita sobre sua própria história e ações frente ao processo da doença.

Nota sobre borrifação integral seguida de pesquisa, como estratégia de vigilância epidemiológica da doença de Chagas, em áreas de recrudescência de focos domiciliares de triatomíneos

A localidade de Altolândia, município de Tapiraí, Minas Gerais, reiteradamente apresenta exemplares de Panstrongylus megistus infestando o ambiente domiciliar. Para intensificar as ações de vigilância na área, foi realizada a borrifação integral dos domicílios com piretróide de alto poder desalojante, seguida de imediata pesquisa triatomínica, com as finalidades de detecção e eliminação dos focos crípticos, assim reduzindo-se as chances de novas infestações.