23,753 research outputs found
J. Rist, Germania anelante la pace, a cura di R. De Pol. traduzione di R. De Pol e M. Gobber
No full textLong-wavelength Pol-InSAR for glacier ice extinction estimation
No full textIn recent years there has been increased interest in using synthetic aperture radar (SAR) to study and monitor glaciers for climate change research. This paper describes the estimation of ice extinctions through modelling of Pol-InSAR (polarimetric interferometric SAR) coherences as a combination of a surface contribution (from the snow-firn interface and wind-induced features) and a volume response. Ground-to-volume scattering ratios derived from a novel polarimetric decomposition are used in conjunction with Pol-InSAR interferometric coherence magnitudes to invert the extinction of the ice layer. The inversion is performed with experimental airborne Pol-InSAR data at L- and P-band collected using DLR's E-SAR system over the Austfonna ice cap in Svalbard, Norway as part of the 2007 ICESAR campaign. Extinction-dependencies on frequency and glacier zone are investigated, and validation is performed comparing P-band sounder data to inverted extinction values
M?dia e desigualdade de g?nero na pol?tica : a invisibilidade feminina na cobertura pol?tica do telejornalismo
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Previous issue date: 2019-02-26Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPESThis paper discusses the relationship between the media and politics, specifically television and the low visibility of women in the coverage of politics. The research aims to analyze the image portrayed by television journalism of women in political positions in Brazil, and in what way the media contributes to giving visibility to these women. With the methodology of content analysis (BARDIN, 1977), a quantitative and qualitative study is proposed in the Jornal da Globo (Rede Globo) and Jornal da Noite (Band) television programs during the months of March and April 2018, in which the space that women in political positions occupy is analyzed, either as a source of information or as the subject of the report. The results are of a political cover that privileges the men, having the women rarely as source. The female presence in the coverage of politics was verified only in reports that dealt with violence and corruption, in the same way that significant absences were identified in reports related directly to women. Finally, there is a need to implement affirmative actions aimed at the greater inclusion of women in politics, as well as to increase their visibility in the media.Este trabalho aborda a rela??o existente entre a m?dia e a pol?tica, mais especificamente a televis?o e a baixa visibilidade da mulher na cobertura de pol?tica. A pesquisa tem como objetivo analisar a imagem retratada pelo telejornalismo das mulheres que ocupam cargos pol?ticos no Brasil, e de que maneira a m?dia contribui para dar visibilidade ou n?o a estas mulheres. Com a metodologia de an?lise de conte?do (BARDIN, 1977), prop?e-se um estudo, quantitativo e qualitativo, nos telejornais Jornal da Globo (Rede Globo) e Jornal da Noite (Band), durante os meses de mar?o e abril de 2018, no qual se analisa o espa?o que as mulheres com cargos pol?ticos ocupam, seja como fonte de informa??o ou sendo o assunto da reportagem. Os resultados s?o de uma cobertura pol?tica que privilegia os homens, tendo as mulheres raramente como fonte. Verificou-se a presen?a feminina na cobertura de pol?tica apenas em reportagens que trataram sobre viol?ncia e corrup??o, da mesma forma que foram identificadas aus?ncias significativas em reportagens relacionadas diretamente ?s mulheres. Aponta-se, por fim, para a necessidade de implementar a??es afirmativas visando ? maior inclus?o das mulheres na pol?tica, bem como para a amplia??o da visibilidade delas na m?dia
Forcing, damping and detuning for single and coupled Van der Pol oscillators
No full textWe use Melnikov function techniques together with geometric methods of bifurcation theory to study the interactions of forcing, damping and detuning on resonant periodic orbits for single and coupled forced Van Der Pol oscillators. For a coupled pair the local bifurcation geometry is almost everywhere described in terms of the singularities of a line congruence in three dimensions
Estimation of glacier ice extinction using long-wavelength airborne Pol-InSAR
No full textIn recent years there has been increased interest in using synthetic aperture radar (SAR) to study and monitor glaciers and ice sheets for glaciological and climate change research. This paper describes the estimation of ice extinctions through modeling of Pol-InSAR (polarimetric interferometric SAR) coherences as a combination of a surface contribution (from the snow-firn interface and wind-induced sastrugi features) and a volume response. Ground-to-volume scattering ratios derived from a novel polarimetric decomposition are used in conjunction with Pol-InSAR coherence magnitudes to invert the extinction of the ice layer. The inversion is performed for experimental airborne Pol-InSAR data at L- and P-band acquired by DLR's E-SAR system over the Austfonna ice cap in Svalbard, Norway as part of the 2007 ICESAR campaign. Extinction-dependencies on frequency and glacier facie
are investigated, and validation is performed comparing ground penetrating radar data to SAR backscatter and extinction values
Extinction estimation over land ice using long-wavelength Pol-InSAR
No full textIn recent years there has been increased interest in using SAR to study and monitor glaciers and ice sheets for glaciological and climate change research. This paper describes for the first time the estimation of ice extinction through the modelling of Pol-InSAR coherences as a combination of a surface contribution from the snow-ice interface and a volume response. Separation of the ground and volume contributions is obtained through decomposition of the polarimetric coherency matrix. Both model-based Freeman 2- and 3-component and eigenvector decompositions are examined. Ground-to-volume scattering ratios derived from polarimetry are used in conjunction with Pol-InSAR interferometric coherences to invert the extinction of the ice layer. Validation is performed with airborne Pol-InSAR data at L- and P-band collected using DLR's E-SAR system over the Austfonna ice cap in Svalbard, Norway as part of the ICESAR campaign
Marino Casali, Terenzio. Padri e Figli. Antologia dalle opere a cura di M. C. Con un saggio di Giuseppe e Augusta Grosso
No full textTordeur Pol. Marino Casali, Terenzio. Padri e Figli. Antologia dalle opere a cura di M. C. Con un saggio di Giuseppe e Augusta Grosso. In: L'antiquité classique, Tome 44, fasc. 1, 1975. p. 264
Marino Casali, Terenzio. Padri e Figli. Antologia dalle opere a cura di M. C. Con un saggio di Giuseppe e Augusta Grosso
No full textTordeur Pol. Marino Casali, Terenzio. Padri e Figli. Antologia dalle opere a cura di M. C. Con un saggio di Giuseppe e Augusta Grosso. In: L'antiquité classique, Tome 44, fasc. 1, 1975. p. 264
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