93 research outputs found

    Interventional closure of RPA-to-LA communication in an oligosymptomatic neonate

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    Direct communication between the right pulmonary artery (RPA) and the left atrium (LA) is a very rare cardiac malformation. Clinical presentation of RPA-to-LA communication depends on the size of the communication, the amount of right-to-left shunt, the patient’s age, and pulmonary vascular resistance. Patients with small communications usually present oligosymptomatic and are diagnosed at an older age. A delay of diagnosis bears the risk of severe complications and needs to be prevented by proper work-up of oligosymptomatic neonates. Treatment of RPA-to-LA communications used to be performed by surgical closure, and the interventional approach has only been established as a less invasive alternative in recent years. Conclusion: Although patients with small RPA-to-LA communications usually present oligosymptomatic, early diagnosis and treatment is essential to prevent life-threatening complications

    Interventional closure of RPA-to-LA communication in an oligosymptomatic neonate

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    Direct communication between the right pulmonary artery (RPA) and the left atrium (LA) is a very rare cardiac malformation. Clinical presentation of RPA-to-LA communication depends on the size of the communication, the amount of right-to-left shunt, the patient's age, and pulmonary vascular resistance. Patients with small communications usually present oligosymptomatic and are diagnosed at an older age. A delay of diagnosis bears the risk of severe complications and needs to be prevented by proper work-up of oligosymptomatic neonates. Treatment of RPA-to-LA communications used to be performed by surgical closure, and the interventional approach has only been established as a less invasive alternative in recent years. Conclusion: Although patients with small RPA-to-LA communications usually present oligosymptomatic, early diagnosis and treatment is essential to prevent life-threatening complications

    Compression of picosecond pulses from a thin-disk laser to 30fs at 4W average power

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    We investigate two approaches for the spectral broadening and compression of 1-ps long pulses of a thin-disk laser amplifier running at 50 kHz repetition rate at 1030 nm wavelength. We find that with a single, 2.66-m long stretched flexible hollow fiber filled with xenon gas, Fourier transform limited output pulse duration of 66 fs can be directly reached. For larger pulse shortening, we applied a hybrid cascaded approach involving a BBO-based pre-compressor and a long hollow fiber. We could achieve 33-times temporal shortening of 1-ps pulses down to a duration of 30 fs at an overall efficiency of similar to 29% with an output power level of 3.7 W. These results demonstrate the potential of stretched flexible fibers with their free length scalability for shortening laser pulses of moderate peak power

    The giant outburst of 4U 0115+634 in 2011 with Suzaku and RXTE - Minimizing cyclotron line biases

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    We present an analysis of X-ray spectra of the high-mass X-ray binary 4U 0115+634 as observed with Suzaku and RXTE in 2011 July, during the fading phase of a giant X-ray outburst. We used a continuum model consisting of an absorbed cutoff power law and an ad hoc Gaussian emission feature centered around 8.5 keV, which we attribute to cyclotron emission. Our results are consistent with a fundamental cyclotron absorption line centered at ∼10.2 keV for all observed flux ranges. At the same time we rule out significant influence of the 8.5 kev Gaussian on the parameters of the cyclotron resonant scattering feature, which are not consistent with the cyclotron line energies or the depths of previously reported flux-dependent descriptions. We also show that some continuum models can lead to artificial line-like residuals in the analyzed spectra, which are then misinterpreted as unphysically strong cyclotron lines. Specifically, our results do not support the existence of a previously claimed additional cyclotron feature at ∼15 keV. Apart from these features, we find for the first time evidence for a He-like Fe XXV emission line at ∼6.7 keV and weak H-like Fe XXVI emission close to ∼7.0 keV.We acknowledge funding by the European Space Agency under contract number C4000115860/15/NL/IB, by the Bundesministerium für Wirtschaft und Technologie under Deutsches Zentrum für Luft- und Raumfahrt grants 50OR0808, 50OR0905, 50OR1113, and 50OR1207, and by the Deutscher Akademischer Austauschdienst. MTW is supported by the NASA Astrophysical Data Analysis Program and the Chief of Naval Research. VG is supported through the Margarethe von Wrangell fellowship by the ESF and the Ministry of Science, Research and the Arts Baden-Württemberg. SMN and JMT acknowledge Spanish Ministerio de Ciencia, Tecnología e Innovación (MICINN) through the grant ESP2016-76683-C3-1-R and ESP2017-85691-P, respectively

    ASCENT Training Guide. Module 1 : Engineering Trends

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    Ajuts: This document has been produced with the economical support of the European Union (Erasmus + Program), through the project "ASCENT - Competence centres for automotive engineering and sales management to increase the positive impact on regional economic development in Argentina, Brazil and Mexico" (Ref. 585796-EPP-1-2017-1-AT-EPPKA2-CBHE-JP).Module one is dedicated to "Engineering Trends". It will start with a general introduction of most recent trends and will afterwards treat the topics which have been identified as to be most interesting to our partner institutions - the target group of the ASCENT project.El módulo uno está dedicado a las "Tendencias de la ingeniería". Comienza con una introducción general de las tendencias más recientes y luego trata los temas que se han identificado como los más interesantes para nuestras instituciones asociadas - el grupo objetivo del proyecto ASCENT.O módulo um é dedicado às "Tendências na Engenharia". Começará com uma introduçao geral das tendências mais recentes e tratará em seguida dos tópicos que foram identificados como os mais interessantes para nossas instituiçôes parceiras - o grupo-alvo do projeto ASCENT

    Module 1 : Engineering Trends

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    Incorporar aquests documents a la Col·lecció del Centre de Recerca i Estudis pel Desenvolupament Organitzatiu. Considerar que el registre té més d'un arxiu, ja que s'incorpora traduït a diversos idiomes

    Módulo 4. Upgrade de Habilidades Técnicas

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    Incorporar aquests documents a la Col·lecció del Centre de Recerca i Estudis pel Desenvolupament Organitzatiu. Considerar que el registre té més d'un arxiu, ja que s'incorpora traduït a diversos idiomes.Este módulo é dedicado ao reforço de capacidade para obter um "Upgrade de Habilidades Técnicas". O foco principal ser  colocado nas instala  es de teste utilizadas na indústria automotiva. Assim, o treinamento começará  com uma visao global das instalaçoes de teste em geral e em particular com o campo de testes da FH Joanneum e Hochschule, Düsseldorf. A apresentaçao será  continuada respondendo à pergunta sobre como construir uma instalaçao de teste. Sao apresentados exemplos de projetos conduzidos nas instituiçoes de parceiros europeus e exemplos de cursos. Em um workshop, os participantes terao a oportunidade de decidir sobre como poderiam implantar o teste de maneira vantajosa em aula e em pesquisa
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