Agricultura migratória na Amazônia: um sistema de produção viável?

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Dendê: oferta e demanda no mercado internacional - perspectivas.

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Castanhais nativos de Marabá - PA: fatores de depredação e bases para a sua preservação.

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Cubeharmonic: A New Interface From A Magnetic 3D Motion Tracking System To Music Performance

We developed a new musical interface, CubeHarmonic, with the magnetic 3D motion tracking system IM3D. This system precisely tracks positions of tiny, wireless, battery-less, and identifiable markers (LC coils) in real time. The CubeHarmonic is a musical application of the Rubik’s cube, with notes on each little piece. Scrambling the cube, we get different chords and chord sequences. Positions of the pieces which contain LC coils are detected through IM3D, and transmitted to the computer to recognize the status of the Rubik’s cube, that plays sounds. The central position of the cube is also measured by the LC coils located into the corners of Rubik’s cube, and, depending on the position, we can manipulate overall loudness and pitch changes, as in theremin playing. This new instrument, whose first idea comes from mathematical theory of music, can be used as a teaching tool both for math (group theory) and music (music theory, mathematical music theory), as well as a composition device, a new instrument for avant-garde performances, and a recreational tool

High Angular Resolution, Sensitive CS J=2-1 and J=3-2 Imaging of the Protostar L1551 NE: Evidence for Outflow-Triggered Star Formation ?

High angular resolution and sensitive aperture synthesis observations of CS ($J=2-1$) and CS ($J=3-2$) emissions toward L1551 NE, the second brightest protostar in the Taurus Molecular Cloud, made with the Nobeyama Millimeter Array are presented. L1551 NE is categorized as a class 0 object deeply embedded in the red-shifted outflow lobe of L1551 IRS 5. Previous studies of the L1551 NE region in CS emission revealed the presence of shell-like components open toward L1551 IRS 5, which seem to trace low-velocity shocks in the swept-up shell driven by the outflow from L1551 IRS 5. In this study, significant CS emission around L1551 NE was detected at the eastern tip of the swept-up shell from $V_{\rm{lsr}}$ = 5.3 km s$^{-1}$ to 10.1 km s$^{-1}$, and the total mass of the dense gas is estimated to be 0.18 $\pm$ 0.02 $M_\odot$. Additionally, the following new structures were successfully revealed: a compact disklike component with a size of $\approx$ 1000 AU just at L1551 NE, an arc-shaped structure around L1551 NE, open toward L1551 NE, with a size of $\sim 5000$ AU, i.e., a bow shock, and a distinct velocity gradient of the dense gas, i.e., deceleration along the outflow axis of L1551 IRS 5. These features suggest that the CS emission traces the post-shocked region where the dense gas associated with L1551 NE and the swept-up shell of the outflow from L1551 IRS 5 interact. Since the age of L1551 NE is comparable to the timescale of the interaction, it is plausible that the formation of L1551 NE was induced by the outflow impact. The compact structure of L1551 NE with a tiny envelope was also revealed, suggesting that the outer envelope of L1551 NE has been blown off by the outflow from L1551 IRS 5.Comment: 29 pages, 12 figures, Accepted for Publication in the Astrophysical Journa

Avaliação de impacto ambiental da inovação tecnológica agropecuária: AMBITEC-AGRO.

O sistema de avaliação de impacto ambiental da inovação tecnológica agropecuária (AMBITEC-AGRO) apresentado neste trabalho compõe-se de quatro aspectos de caracterização do impacto ambiental, expressos por oito indicadores e trinta e seis componentes, todos integrados em matrizes de ponderação formuladas em planilhas eletrônicas automatizadas. Cada componente é avaliado a campo em uma entrevista/vistoria aplicada pelo usuário do sistema a um conjunto de produtores/responsáveis pela atividade à qual aplica-se a inovação tecnológica. O produtor expressa seu conhecimento sobre o coeficiente de alteração do componente devido à influência da tecnologia avaliada sobre a atividade. Este coeficiente de alteração é então ponderado segundo a escala da ocorrência e o peso do componente para formação do indicador de impacto ambiental e os resultados das avaliações dos indicadores são expressos graficamente nas planilhas. Finalmente, os resultados dos indicadores são ponderados pelo peso dos indicadores para composição do índice de impacto ambiental (Índice I.A.) da inovação tecnológica agropecuária.bitstream/CNPMA/5806/1/documentos_34.pd

An environmental impact assessment system for agricultural R&D.

A strategic planning process has been implemented at the Brazilian Agricultural Research Agency (Embrapa) to introduce sustainable agriculture concepts in all steps of Research and Development (R&D). An essential part of the devised mission statement called for the impact assessment of all technology innovation resulting from R&D, under field conditions (ex-post). However, methods for impact assessment of technology innovations at the farmstead level appropriate for the institutional context were lacking. The environmental impact assessment (EIA) system (AMBITEC-AGRO) developed to attend that demand is composed by a set of weighing matrices constructed in an electronic spreadsheet. Impact indicators are evaluated in the field in an interview/survey, and weighed according to their spatial scale and importance toward effecting environmental impacts. The results of these weighing procedures are expressed graphically in the assessment spreadsheets. Finally, the indicator evaluations are composed into an Environmental Impact Index for the agricultural technology innovation

Efeitos de diferentes sistemas de cultivo nas propriedades físicas e produtividade do solo.

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