937 resultados para Ondas oceânicas


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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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In the mid-nineteenth century, in his fruitful years of the perhaps best-known shortest literary career, Álvares de Azevedo wrote this verse “As ondas são anjos que dormem no mar” (“The waves are angels who sleep in the sea”). In the presentation of João Gilberto Noll’s young adult novel Anjo das ondas (Angel of the waves) in 2010, Ivan Marques states that the character in the novel, Gustavo, “with his adolescent passion, and torn spirit with overflowing lyrics, could even be compared to our tropical Byron”. João Gilberto Noll establishes a connection between him and Álvares de Azevedo that invites the reader to go beyond a first reading level of his work, seeking evidence of dialogue ratification between two apparently distant writers. The subtle intertextuality exceeds the initial clue and can be detected on Noll’s theme development from the history of Gustavo, a troubled teenager in search of his identity. Noll’s affinity to Álvares de Azevedo can still be captured in his narrative texture, in voices coming from his text; however, they also reveal to be unique and original features of his literary production. An apparent exercise in style shows that each author fulfills his mission by expressing, in his own way, the feeling of his time. In addition, it shows that through aesthetic emotion, literature allows us to transcend time and space.

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Pós-graduação em Engenharia Mecânica - FEIS

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Pós-graduação em Geologia Regional - IGCE

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Pós-graduação em Medicina Veterinária - FMVZ

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Pós-graduação em Engenharia Mecânica - FEIS

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Pós-graduação em Química - IQ

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The application of ultrasound waves with a conventional dental ultrasonic scaler on glass ionomer cements surface accelerated initial setting reaction and improved the mechanical properties. Objective: This study evaluated the ultimate tensile strength of glass ionomer cements after ultrasonic excitation and different water storage times. Material and method: Twelve specimens of each material (Fuji IX GP, Ketac Molar Easymix and Vitremer) were prepared, and six of each received a 30-second ultrasound application during initial setting of the cements. After storage of the 24 hours or 30 days, the specimens were sectioned into stick to microtensile testing and the mean ultimate tensile strength values were submitted to Welch’s ANOVA and Tamhane’s test. Result: The results showed that the Vitremer presented the highest mean tensile strength. The chemically set Fuji IX GP presented significantly higher mean tensile strength after 30 days than after 24 hours of storage (p < 0.05). At 24 hours, the ultrasonically set Fuji IX GP presented significantly higher mean tensile strength than their counterparts set under standard conditions (p < 0.05). Conclusion: Treatment with ultrasound increased the tensile strength of Fuji IX GP in the early period of maturation.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Diottix(r) was calibrated at 25 Hz to achieve the frequency indicated in literature as being effective to mobilize the airways secretions. However, the amplitude and frequency of the waves generated by the equipment in different regions of the chest still need to be investigated. The objective of this study was to analyze the frequency and amplitude of waves generated by Diottix(r) in chests of healthy subjects. Diottix(r) was used in the anterior and posterior regions of the chest. The mechanical waves were captured using stethoscopes connected to electret microphones, which were connected to a digital oscilloscope. Frequency and amplitude data were recorded by the stethoscope, positioned in six points in the anterior region and six in the posterior region of the chest, following the positions commonly used in pulmonary auscultation. Signals were recorded and transferred to a computer with software for their analysis. The frequency of waves did not present a significant change (from 24.9 to 26.4 Hz). The wave amplitude in the anterior versus the posterior region in each area of the lung, the upper, middle and lower, had differences. Diottix(r) produces frequencies in the chest according to the calibrated; thus, it can be a complementary resource to bronchial hygiene maneuvers. The amplitudes of waves seem to be affected by other structures like bone parts and heart.