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Martineau, Patrick,Son, Seok-Woo,Taguchi, Masakazu,Butler, Amy H. Copernicus GmbH 2018 Atmospheric Chemistry and Physics Vol.18 No.10
<P>Abstract. The agreement between reanalysis datasets, in terms of the zonal-mean momentum budget, is evaluated during sudden stratospheric warming (SSW) events. It is revealed that there is a good agreement among datasets in the lower stratosphere and troposphere concerning zonal-mean zonal wind, but less so in the upper stratosphere. Forcing terms of the momentum equation are also relatively similar in the lower atmosphere, but their uncertainties are typically larger than uncertainties of the zonal-wind tendency. Similar to zonal-wind tendency, the agreement among forcing terms is degraded in the upper stratosphere. Discrepancies among reanalyses increase during the onset of SSW events, a period characterized by unusually large fluxes of planetary-scale waves from the troposphere to the stratosphere, and decrease substantially after the onset. While the largest uncertainties in the resolved terms of the momentum budget are found in the Coriolis torque, momentum flux convergence also presents a non-negligible spread among the reanalyses. Such a spread is reduced in the latest reanalysis products, decreasing the uncertainty of the momentum budget. It is also found that the uncertainties in the Coriolis torque depend on the strength of SSW events: the SSW events that exhibit the most intense deceleration of zonal-mean zonal wind are subject to larger discrepancies among reanalyses. These uncertainties in stratospheric circulation, however, are not communicated to the troposphere. </P>
Katherine B. Martineau 한국외국어대학교 HK 세미오시스 연구센터 2020 Signs and Society Vol.8 No.1
This is a case study of an official orthographic change in eastern India, which I approach as a debate about semiotic ideologies. In 2012, an Indian constitutional amendment changed the names of one of India’s eastern states, Odisha, and its state language, Odia, in Devanagari and Roman scripts. Building on recent studies of multilingual and multiscriptal orthographies on public signs, I examine official parliamentary and popular media arguments about the orthographic correspondences between Odia, English, and Hindi names for the state and its language. As the debaters propose contrasting models of official naming and justify them, they build on different orientations to the material embodiments of linguistic signs. These different assumptions also support contrasting social imaginaries of Odisha in relationship to the nation. This article proposes that orientations to the body and embodiment can be an important component of the semiotic ideologies of orthography.
J.P. MARTINEAU,A. BRIENT,J.Y. HASCOET 한국트라이볼로지학회 2002 한국트라이볼로지학회 학술대회 Vol.2002 No.10
This paper presents a preliminary study of the influence of roughness due to marine propeller blades machining on their performance. A blade surface finish that has been roughened by corrosion, cavitation and other phenomena, leads to a power penalty. Thus propellers manufacturers tend to propose blades of great surface finish, even mirror-polished. However achieving such surface finish increases manufacturing costs. With modem manufacturing means, propellers can now be machined while preserving a good surface finish. We have studied the influence of manufacturing strategy on an aspect of hydrodynamic performance, cavitation.