416 research outputs found
The Energy Resolution and Window Area Capabilities of the Gas Proportional Scintillation Counter
The behaviour of xenon and argon-xenon gas proportional scintillation counters is con sidered. For X-rays, ranges of window area are defined showing competition with semiconductor detectors. Data for primary scintillation of X-rays and alpha particles are included. Relative efficiencies of tetraphenylbutadiene, p-terphenyl, diphenyl-stilbene, sodium salicylate and p-quaterphenyl were measure
Measurement of Ï c1 and Ï c2 production with sâ = 7 TeV pp collisions at ATLAS
The prompt and non-prompt production cross-sections for the Ï c1 and Ï c2 charmonium states are measured in pp collisions at sâ = 7 TeV with the ATLAS detector at the LHC using 4.5 fbâ1 of integrated luminosity. The Ï c states are reconstructed through the radiative decay Ï c â J/ÏÎł (with J/Ï â ÎŒ + ÎŒ â) where photons are reconstructed from Îł â e + e â conversions. The production rate of the Ï c2 state relative to the Ï c1 state is measured for prompt and non-prompt Ï c as a function of J/Ï transverse momentum. The prompt Ï c cross-sections are combined with existing measurements of prompt J/Ï production to derive the fraction of prompt J/Ï produced in feed-down from Ï c decays. The fractions of Ï c1 and Ï c2 produced in b-hadron decays are also measured
Uso de nanobast?es de ouro para o desenvolvimento de aulas pr?ticas de nanotecnologia.
Use of gold
nanoparticles functionalization experiment was conducted in a biotechnology summer course at UFOP as a model for the introduction
of the laboratory practice in nanotechnology for postgraduate courses in the areas of chemistry and biotechnology. The gold
nanorods were synthesized by the seed method and then, functionalized with anti-IL-6 antibodies using the reagents EDAC/NHS
and polyethyleneimine (PEI). This nanocompound was tested against the binding with the specific antigen (IL-6) and changes in the
longitudinal plasmon absorption spectrum showed the coupling efficiency, which was also verified by the decrease in zeta potential.
The experiment was satisfactory, with a positive feedback from participants, and could be implemented in nanotechnology practical
classes from postgraduate courses, as a way for improve education in the emergent area of nanobiotechnology
Construction and validation of indicators and respective definitions for the nursing outcome Swallowing Status
;;OBJETIVO:;; construir e validar por especialistas e clinicamente os indicadores para o resultado de enfermagem Estado da deglutição e suas definiçÔes conceituais e operacionais em pacientes apĂłs acidente vascular cerebral.;;;;MĂTODO:;; estudo metodolĂłgico, com anĂĄlise de conceito e validaçÔes de conteĂșdo e clĂnica. Verificou-se o Ăndice de Validade de ConteĂșdo para as notas atribuĂdas por 11 especialistas aos indicadores revisados. Na validação clĂnica, examinaram-se 81 pacientes por duas duplas de enfermeiros, uma usando instrumento com as definiçÔes construĂdas e outra com instrumento sem definiçÔes. As avaliaçÔes foram comparadas pelo Coeficiente de Correlação Intraclasse, teste de Friedman e Diferença MĂnima Significante.;;;;RESULTADOS:;; exceto o indicador Captura do alimento, todos apresentaram Ăndice de Validade de ConteĂșdo superior a 0,80. A dupla de enfermeiros com instrumento contendo as definiçÔes construĂdas apresentou Coeficiente de Correlação Intraclasse superior a 0,80 para todos os indicadores e pelo cĂĄlculo da Diferença MĂnima Significante houve similaridade entre todas as avaliaçÔes. Na dupla que estava sem as definiçÔes elaboradas, o coeficiente foi baixo (Ï;;;;CONCLUSĂO:;; os dados evidenciaram aumento na uniformidade e acurĂĄcia entre as avaliaçÔes dos enfermeiros ao utilizar as definiçÔes conceituais e operacionais para os indicadores do resultado de enfermagem Estado da deglutição.;;;;OBJECTIVE:;; to develop indicators for the nursing outcome Swallowing Status and the respective conceptual and operational definitions validated by experts and in a clinical setting among patients after having experienced a stroke.;;;;METHOD:;; methodological study with concept analysis and content and clinical validations. The Content Validation Index was verified for the scores assigned by 11 experts to indicators. Two pairs of nurses assessed 81 patients during the clinical validation: one pair used an instrument with definitions and the other used an instrument without definitions. The resulting assessments were compared using Intraclass Correlation Coefficient, Friedman's test, and Minimal Important Difference calculation.;;;;RESULTS:;; All the indicators, with the exception of the indicator Ability to bring food to mouth, presented Content Validation Index above 0.80. The pair using the instrument with definitions presented an Intraclass Correlation Coefficient above 0.80 for all the indicators and similarity was found in all the assessments, according to the Minimal Important Difference calculation. The pair using the instrument without definitions presented a low coefficient (Ï;;OBJETIVO:;; construir y validar por especialistas y clĂnicamente los indicadores para el resultado de enfermerĂa Estado de la degluciĂłn y sus definiciones conceptuales y operacionales en pacientes despuĂ©s de accidente vascular cerebral.;;;;MĂTODO:;; estudio metodolĂłgico, con anĂĄlisis de concepto y validaciones de contenido y clĂnicas. Se verificĂł el Ăndice de Validez de Contenido para las notas atribuidas por 11 especialistas a los indicadores revisados. En la validaciĂłn clĂnica, fueron examinados 81 pacientes por dos parejas de enfermeros, una usando instrumento con las definiciones construidas y la otra con instrumento sin definiciones. Las evaluaciones fueron comparadas por el Coeficiente de CorrelaciĂłn Intraclase, test de Friedman y Diferencia MĂnima Significativa.;;;;RESULTADOS:;; exceptuando el indicador Captura del alimento, todos presentaron Ăndice de Validez de Contenido superior a 0,80. La pareja de enfermeros con instrumento conteniendo las definiciones construidas presentĂł Coeficiente de CorrelaciĂłn Intraclase superior a 0,80 para todos los indicadores y por el cĂĄlculo de la Diferencia MĂnima Significativa hubo semejanza entre todas las evaluaciones. En la pareja que estaba sin las definiciones elaboradas, el coeficiente fue bajo (
Measurement of the inclusive jet cross-section in proton-proton collisions at âs=7 TeV using 4.5 fbâ1 of data with the ATLAS detector
The inclusive jet cross-section is measured in proton-proton collisions at a centre-of-mass energy of 7 TeV using a data set corresponding to an integrated luminosity of 4.5 fbâ1 collected with the ATLAS detector at the Large Hadron Collider in 2011. Jets are identified using the anti-kt algorithm with radius parameter values of 0.4 and 0.6. The double-differential cross-sections are presented as a function of the jet transverse momentum and the jet rapidity, covering jet transverse momenta from 100 GeV to 2 TeV. Next-to-leading-order QCD calculations corrected for non-perturbative effects and electroweak effects, as well as Monte Carlo simulations with next-to-leading-order matrix elements interfaced to parton showering, are compared to the measured cross-sections. A quantitative comparison of the measured cross-sections to the QCD calculations using several sets of parton distribution functions is performed
Photography-based taxonomy is inadequate, unnecessary, and potentially harmful for biological sciences
The question whether taxonomic descriptions naming new animal species without type specimen(s) deposited in collections should be accepted for publication by scientific journals and allowed by the Code has already been discussed in Zootaxa (Dubois & NemĂ©sio 2007; Donegan 2008, 2009; NemĂ©sio 2009aâb; Dubois 2009; Gentile & Snell 2009; Minelli 2009; Cianferoni & Bartolozzi 2016; Amorim et al. 2016). This question was again raised in a letter supported
by 35 signatories published in the journal Nature (Pape et al. 2016) on 15 September 2016. On 25 September 2016, the following rebuttal (strictly limited to 300 words as per the editorial rules of Nature) was submitted to Nature, which on
18 October 2016 refused to publish it. As we think this problem is a very important one for zoological taxonomy, this text is published here exactly as submitted to Nature, followed by the list of the 493 taxonomists and collection-based
researchers who signed it in the short time span from 20 September to 6 October 2016
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