54,633 research outputs found
Guilherme Gaelzer Netto (1874-1959): o Kaiser dos trópicos
Get PDFTese (doutorado) - Universidade Federal de Santa Catarina, Centro de Filosofia e Ciências Humanas, Programa de Pós-Graduação em História, Florianópolis, 2015.Esta pesquisa analisa a trajetória biográfica de Guilherme Gaelzer Netto (1874-1959), que foi membro do Partido Republicano Rio-Grandense (PRR), intendente municipal de São Leopoldo (1902-1916) e diretor do Escritório de Propaganda e Expansão Comercial Brasil-Alemanha (1936-1959). A administração de Gaelzer Neto marcou profundamente a região do Vale do Rio dos Sinos. Após abandonar a vida política, Gaelzer Netto dirigiu-se ao Rio de Janeiro, onde ocupou diversos cargos junto ao governo federal e se dedicou às relações internacionais. Elemento destacado junto às elites do grupo étnico alemão, Gaelzer Netto transitou com desenvoltura junto aos círculos do poder nacional e internacional. Políticos, empresários, intelectuais, comerciantes, fizeram parte de sua rede de sociabilidade. Seus contatos pessoais o projetaram internacionalmente levando-o à Europa, em especial à Alemanha, onde estimulou as relações políticas, sociais, econômicas e culturais Brasil-Alemanha. Gaelzer Netto destacou-se no recrutamento de imigrantes alemães e na propaganda de produtos brasileiros durante a República de Weimar, a Alemanha Nazista e o pós-guerra. Além disso, ajudou a construir a imagem do Brasil no exterior. A biografia de Gaelzer Netto analisa os vínculos que as elites imigrantistas no Brasil mantinham com a Alemanha, discute as estratégias utilizadas por Gaelzer Netto para se projetar em nível local, regional, nacional e internacional. A pesquisa explora diversas fontes documentais inéditas disponíveis em arquivos nacionais e no exterior, em especial, nos arquivos do Ministério das Relações Exteriores da Alemanha e do Instituto Ibero-Americano em Berlim. Nesta biografia discutimos a intrigante trajetória deste descendente de imigrantes alemães que se destacou em meio aos diversos segmentos políticos, sociais, econômicos e culturais das sociedades brasileira e alemã para, desta forma, defender os interesses do governo brasileiro e alemão, do grupo étnico alemão e seus interesses privados. Na análise das fontes documentais burocráticas, diplomáticas e pessoais procuramos identificar suas estratégias de atuação, compreender sua identidade de homem público, descrever sua rede de sociabilidade e entender os exercícios de adequação necessários aos diferentes contextos nos quais viveu. A biografia de Gaelzer Netto nos fornece uma visão das relações diplomáticas Brasil-Alemanha, sobretudo no diálogo que mantinha com as autoridades públicas alemãs e brasileiras, bem como nos fornece diferentes perspectivas e interpretações acerca das relações Brasil-Alemanha na primeira metade do séc. XX.Abstract : This research analyzes the life histories of William Gaelzer Netto (1874-1959), who was a member of the Rio Grande-Republican Party (PRR), municipal mayor of São Leopoldo (1902-1916) and director of the Department of Propaganda and Commercial Expansion Brazil-Germany (1936-1959). The Gaelzer Neto administration deeply marked the region of Vale do Rio dos Sinos. After abandoning political life, Gaelzer Netto went to Rio de Janeiro, held several positions with the federal government and devoted himself to international relations. A prominent element with the elite of the German ethnic group, Gaelzer Netto moved with easy from the circles of national and international power. Politicians, businessmen, intellectuals, merchants, were part of his network of sociability. His personal relations provided him international projection, taking him to Europe, especially to Germany, where he stimulated the political, social, economic and cultural Brazil-Germany interchange. Gaelzer Netto stood out in the recruitment of German immigrants and advertising of Brazilian products during the Weimar Republic, Nazi Germany and the post-war. In addition, he helped build the image of Brazil abroad. The biography of Gaelzer Netto analyzes the links that immigrant elites in Brazil had with Germany, discusses the strategies used by Gaelzer Netto to project himself at local, regional, national and international levels. The research explores several unpublished documentary sources available in the National Archives and abroad, especially in the German Ministry of files of Foreign Affairs and the Ibero-American Institute in Berlin. In this biography we discuss the intriguing history of this descendant of German immigrants who stood out among the various political groups, social, economic and cultural rights of Brazilian and German companies to thus defend the interests of the Brazilian and German government, the German ethnic group and their private interests. In the analysis of bureaucratic, diplomatic and personal documentary sources we seek to identify his action strategies, understand his identity as a public man, describe his sociability network and understand the adequacy of exercise necessary for the different contexts in which he lived. The biography of Gaelzer Netto provides us with a vision of diplomatic relations Brazil-Germany, especially in the dialogue he had with the German and Brazilian public authorities and provides us with different perspectives and interpretations of the Brazil-Germany relations in the first half of the XX century
A 2 h periodic variation in the low-mass X-ray binary Ser X-1
No full textSpectroscopy of the low-mass X-ray binary Ser X-1 using the Gran Telescopio Canarias have revealed a ?2 h periodic variability that is present in the three strongest emission lines. We tentatively interpret this variability as due to orbital motion, making it the first indication of the orbital period of Ser X-1. Together with the fact that the emission lines are remarkably narrow, but still resolved, we show that a main-sequence K dwarf together with a canonical 1.4 M? neutron star gives a good description of the system. In this scenario, the most likely place for the emission lines to arise is the accretion disc, instead of a localized region in the binary (such as the irradiated surface or the stream-impact point), and their narrowness is due instead to the low inclination (?10°) of Ser X-1
Development of a brain computer interface based on steady-state visual evoked potential with multiple intermittent photo stimulation
No full textBackground: Brain–computer interfaces (BCIs) are systems able to convert the brain activity into electrical signals, which may be used to take decisions and/or control an artificial device. They may be classified as either passive or active. In this latter kind of BCI, changes in the electroencephalogram (EEG) in response to an external stimulus are used to decode a command or an order to an external device. New method: This project aims at developing a stable and active BCI based on steady-state visual evoked potential (SSVEP) by intermittent photic stimulation using different LEDs with high stimulation frequencies to improve visual comfort. Spatial filters, calculated automatically during a training phase, are used in pre-processing to enhance the EEG signals and their desired features. Hence, we present an approach to automatically calculate the optimum spatial filters to detect the SSVEP at each stimulation frequency used. Results: Experiments with 10 subjects allowed determining which detection method, based on either the instantaneous power or the magnitude-squared coherence, is more suitable for decoding the commands the BCI has to give out. Comparison with existing methods: Differently to other methods, this one chooses automatically the best spatial filter during the training phase and uses multiple stimulation frequencies with high frequencies to avoid annoyance and preventing risks related to photo-epilepsy. Conclusions: A stable and active BCI was designed with a correct detection rate within 74–76%, ITR value between 19 and 26 [bit/min] and response delay for the detection between two consecutive stimulation frequencies within 2–2.5 s
The long-wavelength view of GG Tau A: rocks in the ring world
No full textWe present the first detection of GG Tau A at centimetre wavelengths, made with the Arcminute Microkelvin Imager Large Array at a frequency of 16 GHz (λ = 1.8 cm). The source is detected at >6 σrms with an integrated flux density of S16GHz = 249 ± 45 µJy. We use these new centimetre-wave data, in conjunction with additional measurements compiled from the literature, to investigate the long-wavelength tail of the dust emission from this unusual protoplanetary system. We use an MCMC-based method to determine maximum likelihood parameters for a simple parametric spectral model and consider the opacity and mass of the dust contributing to the microwave emission. We derive a dust mass of Md ~ 0.1 Msun, constrain the dimensions of the emitting region and find that the opacity index at λ > 7 mm is less than unity, implying a contribution to the dust population from grains exceeding ~4 cm in size. We suggest that this indicates coagulation within the GG Tau A system has proceeded to the point where dust grains have grown to the size of small rocks with dimensions of a few centimetres. Considering the relatively young age of the GG Tau association in combination with the low derived disc mass, we suggest that this system may provide a useful test case for rapid core accretion planet formation models
Comportamento de variedades de milheto (Pennisetum glaucum (L.) R. Br.) para produção de massa.
Get PDF- NETTO, D.A.M
Lashed by the wind : short-term Middle Palaeolithic occupations within the loess-palaeosoil sequence at Monte Netto (Northern Italy)
No full textThe final Middle Palaeolithic of northern Italy is almost exclusively known based on pluristratified sites in caves or rock shelter, which attest a certain technological variability within the Mousterian through the adoption of different knapping methods focused on the production of flakes or blades. The almost total lack of specialized
and/or short-term open-air sites framed at this stage contributes to create a fragmentary and incomplete picture with regard to the last Neanderthal occupation of the area. For this reason, the Monte Netto site, an isolated hill at the northern margin of the Po Plain and at the foot of the Prealps, represents a key deposit to investigate this phase. Along the loess-palaeosoil sequence, investigated from a geochronological and pedological point of view, frequentations by Mousterian Neanderthal groups are attested at two different times, of which the most consistent is: associated to sediments dated to 44,400 ± 5.4 ky BP. The findings confirm the sporadic frequentation of marginal open areas during the cold, arid and highly fluctuating climate of the MIS 3, providing a more complete picture of the human occupation along the Po Plain Loess Basin (PPLB). An interregional comparison points out the clear intention, by the last Neanderthal groups of the Po Plain, of producing elongated supports by applying different methods, within a varied and organized system of resources exploitation evidenced by the selection of raw materials coming from more than 60 km
Measurement of the D+/- production asymmetry in 7 TeV pp collisions
Get PDFThe asymmetry in the production cross-section \sigma of D+/- mesons, A_P = (\sigma(D+) - \sigma(D-))/(\sigma(D+) + \sigma(D-)), is measured in bins of pseudorapidity \eta and transverse momentum p_T within the acceptance of the LHCb detector. The result is obtained with a sample of D+ -> K_S pi+ decays corresponding to an integrated luminosity of 1.0 fb^-1, collected in pp collisions at a centre of mass energy of 7 TeV at the Large Hadron Collider. When integrated over the kinematic range 2.0 K_S pi+ decay is negligible. No significant dependence on \eta or p_T is observed
Biosystematic studies of selected Texas species of Dichanthelium (Poaceae)
No full textVita.A taxonomic study was made of two genera, Dichanthelium and Panicum, in order to justify the elevation of Dichanthelium to generic rank. A comparison of all published characters, all new character differences found by the author, and ecological (including phenological) differences support the rank of genus for Dichanthelium. Dichanthelium and Panicum have as many, if not more, differences than do other closely related genera, i.e., Brachiaria, Paspalum, Eriochloa, and Leptoloma. Although closely related, Dichanthelium and Panicum are distinct genera. Diagnostic characters of selected Texas species of Dichanthelium compared include ligules, leaf blade epidermis, lemma and palea apices, leaf and culm anatomy, and cytology. The selected species include Dichanthelium dichotomum (L.) Gould, D. lindheimeri (Nash) Gould, D. angustifolium (E ll.) Gould, D. lanuginosum (E ll.) Gould, D. oligosanthes (Schult.) Gould, and D. sphaerocarpon (E ll.) Gould. These species were chosen because they are apparently closely related and representative of their respective groups. All are in the subgenus Dichanthelium, but all are in different groups (Brown & Smith, 1975): Dichanthelium dichotomum in group Dichotoma, D. lindheimeri in Spreta, D. angustifolium in Angustifolia, D. lanuginosum in Lanuginosa, D. oligosanthes in Oligosanthia, and D. sphaerocarpon in Sphaerocarpa.
Evidence for the decay B0→J/ψω and measurement of the relative branching fractions of meson decays to J/ψη and J/ψη′
Get PDFFirst evidence of the B 0 → J / ψ ω decay is found and the B s 0 → J / ψ η and B s 0 → J / ψ η ′ decays are studied using a dataset corresponding to an integrated luminosity of 1.0 fb -1 collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of sqrt(s) = 7 TeV. The branching fractions of these decays are measured relative to that of the B 0 → J / ψ ρ 0 decay:frac(B (B 0 → J / ψ ω), B (B 0 → J / ψ ρ 0)) = 0.89 ± 0.19 (stat) - 0.13 + 0.07 (syst),frac(B (B s 0 → J / ψ η), B (B 0 → J / ψ ρ 0)) = 14.0 ± 1.2 (stat) - 1.5 + 1.1 (syst) - 1.0 + 1.1 (frac(f d, f s)),frac(B (B s 0 → J / ψ η ′), B (B 0 → J / ψ ρ 0)) = 12.7 ± 1.1 (stat) - 1.3 + 0.5 (syst) - 0.9 + 1.0 (frac(f d, f s)), where the last uncertainty is due to the knowledge of f d / f s, the ratio of b-quark hadronization factors that accounts for the different production rate of B 0 and B s 0 mesons. The ratio of the branching fractions of B s 0 → J / ψ η ′ and B s 0 → J / ψ η decays is measured to befrac(B (B s 0 → J / ψ η ′), B (B s 0 → J / ψ η)) = 0.90 ± 0.09 (stat) - 0.02 + 0.06 (syst)
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