22 research outputs found
Recommended from our members
Response of the northern stratospheric polar vortex to the seasonal alignment of QBO phase transitions
This study considers the strength of the Northern
Hemisphere Holton-Tan effect (HTE) in terms of the phase
alignment of the quasi-biennial oscillation (QBO) with
respect to the annual cycle. Using the ERA-40 Reanalysis, it
is found that the early winter (Nov–Dec) and late winter
(Feb–Mar) relation between QBO phase and the strength of
the stratospheric polar vortex is optimized for subsets of the
44-year record that are chosen on the basis of the
seasonality of QBO phase transitions at the 30 hPa level.
The timing of phase transitions serves as a proxy for
changes in the vertical structure of the QBO over the whole
depth of the tropical stratosphere. The statistical
significance of the Nov–Dec (Feb–Mar) HTE is greatest
when 30 hPa QBO phase transitions occur 9–14 (4–9)
months prior to the January of the NH winter in question.
This suggests that there exists for both early and late winter
a vertical structure of tropical stratospheric winds that is
most effective at influencing the interannual variability of
the polar vortex, and that an early (late) winter HTE is
associated with an early (late) progression of QBO phase
towards that structure. It is also shown that the seasonality
of QBO phase transitions at 30 hPa varies on a decadal
timescale, with transitions during the first half of the
calendar year being relatively more common during the first
half of the tropical radiosonde wind record. Combining
these two results suggests that decadal changes in HTE
strength could result from the changing seasonality of QBO
phase transitions. Citation: Anstey, J. A., and T. G. Shepherd
(2008), Response of the northern stratospheric polar vortex to the
seasonal alignment of QBO phase transitions, Geophys. Res. Lett.,
35, L22810, doi:10.1029/2008GL035721
Response of the Quasi‐Biennial Oscillation to a warming climate in global climate models
Influence of quasi‐biennial oscillation on the boreal winter extratropical stratosphere in QBOi experiments
Malaria parasite clearance: what are we really measuring?
Antimalarial drugs are vital for treating malaria and controlling transmission. Measuring drug efficacy in the field requires large clinical trials and thus we have identified proxy measures of drug efficacy such as the parasite clearance curve. This is often assumed to measure the rate of drug activity against parasites and is used to predict optimal treatment regimens required to completely clear a blood-stage infection. We discuss evidence that the clearance curve is not measuring the rate of drug killing. This has major implications for how we assess optimal treatment regimens, as well as how we prioritise new drugs in the drug development pipeline.David S.Khoury, Sophie G.Zaloumis, Matthew J.Grigg, Ashraful Haque, Miles P.Davenport, The Interdisciplinary Approaches to Malaria Consortiu
Signatures of naturally induced variability in the atmosphere using multiple reanalysis datasets
Análise dos discursos acadêmicos da/sobre a voz cantada no processo de ensino-aprendizagem.
Submitted by Biblioteca Central ([email protected]) on 2019-11-06T18:18:13Z
No. of bitstreams: 2
jose_reginaldo_gomes_santana.pdf: 1808815 bytes, checksum: e1e495362eb33dc7e29e80224be6ef05 (MD5)
license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)Made available in DSpace on 2019-11-06T18:18:13Z (GMT). No. of bitstreams: 2
jose_reginaldo_gomes_santana.pdf: 1808815 bytes, checksum: e1e495362eb33dc7e29e80224be6ef05 (MD5)
license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)
Previous issue date: 2019-10-22Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESThis research has as general objective to analyze the academic discourses on / onf
the production of the sung voice in the teaching-learning process. The specific
objectives are: To identify the speeches about the singing voice that circulate in the
academic environment of courses of Licenciatura in Music; To identify, in academic
discourses, identity affirmations and ideological interpellations that position the subject
in front of the established ways of singing in the teaching-learning process; to analyze
the functioning of the materiality of the voice sung in the teaching-learning process.
This research is of a qualitative nature and developed through theoreticalmethodological
procedures of French Discourse Analysis, affiliated with the thought of
Michel Pêcheux and with theoretical and methodological developments in Brazil from
Eni Orlandi's studies. Among the theoretical-methodological framework of Discourse
Analysis, the concepts of discursive formations, identification, counter-identification,
delimitation, discursive memory, vocal sounds and discursivity of the body will be
mobilized. The research was carried out with students and teachers in Licentiate
degree courses in Music with qualification in popular singing and courses with curricula
that prioritize the erudite music. The selection of participants for this study is related to
subjects who experience the construction of knowledge in the subjects of popular
singing and vocal technique. The corpus came from semi-structured interviews and
singing auditions. As for discursive functioning, it has been identified that the
imbrication of what is discursive, of what is signified in history, with what is individual,
unique, timbristic produces discourses and / or imagistic illusions of identification with
the voice of the other, identification and counter-identification of the subject with the
discursive formations of the vocal technique.Esta pesquisa tem como objetivo geral analisar os discursos acadêmicos da/sobre a produção da voz cantada no processo de ensino-aprendizagem. Os objetivos específicos são: Identificar os discursos sobre a voz cantada que circulam no ambiente acadêmico de cursos de Licenciatura em Música; Identificar, nos discursos acadêmicos, afirmações identitárias e interpelações ideológicas que posicionam o
sujeito frente aos modos estabelecidos de cantar vigentes no processo de ensinoaprendizagem;
analisar o funcionamento da materialidade da voz cantada no processo de ensino-aprendizagem. Esta pesquisa é de natureza qualitativa e desenvolvida por meio de procedimentos teórico-metodológicos da Análise de Discurso de linha francesa, filiada ao pensamento de Michel Pêcheux e com desdobramentos teóricos e metodológicos no Brasil a partir de estudos de Eni Orlandi. Dentre o arcabouço teórico-metodológico da Análise do Discurso, serão mobilizados, principalmente, os conceitos de formações discursivas, identificação, contraidentificação, desindentificação, memória discursiva, sonoridades vocais e
discursividade do corpo. A pesquisa foi realizada com discentes e docentes em cursos de Licenciatura em Música com habilitação em canto popular e cursos com currículos que priorizam a música erudita. A escolha dos participantes deste estudo está relacionada a sujeitos que vivenciam a construção de conhecimentos nas disciplinas de Canto popular e de Técnica vocal. O corpus adveio de entrevistas semiestruturadas
e de audições de canto. Quanto ao funcionamento discursivo, identificou-se que o imbricamento do que é discursivo, do que é significado na história, com o que é individual, único, timbrístico produz discursos e/ou ilusões imagéticas de identificação com a voz do outro, identificação e contraidentificação do sujeito com as formações discursivas da técnica vocal
Disinfectant tolerance and antibiotic resistance in psychrotrophic Gram-negative bacteria isolated from vegetables
Psychological profile of subjects facilitating responsible preventive behavior
Preventive behavior, Psychological profile,