Angular Motions
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Controle de movimentos coordenados de robôs móveis quando os robôs assumem a liderança de maneira aleatória / Control of coordinated movements of mobile robots when the robots take the lead in a random
This dissertation proposes a study on the automatic control of dynamic systems to the problem of coordination of mobile robots. The coordinated motions are performed with the robots following a leader, and any robot of the formation can assume the leadership randomly. The robots exchange informations according to a pre-specified communication directed graph
Publicado em: 2009
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2. DEVELOPING A VERSATILE MONOCHROMATIZATION SYSTEM FOR X-RAYS / DESENVOLVIMENTO DE UM SISTEMA DE MONOCROMATIZAÇÃO VERSÁTIL PARA RAIOS-X
The investigation of the dynamics of the interaction of high-energy X-rays and molecules of biological interest requires the energy of the X-rays to be well defined, so that one can establish the dependence of the molecular ionization and fragmentation patterns as functions of the incident beam energy. For this purpose, a versatile system for the monochromat
Publicado em: 2009
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3. Synergistic control of forearm based on accelerometer data and artificial neural networks
In the present study, we modeled a reaching task as a two-link mechanism. The upper arm and forearm motion trajectories during vertical arm movements were estimated from the measured angular accelerations with dual-axis accelerometers. A data set of reaching synergies from able-bodied individuals was used to train a radial basis function artificial neural ne
Brazilian Journal of Medical and Biological Research. Publicado em: 30/04/2008
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4. Identificação de matrizes de função de resposta em freqüência multidirecionais em estruturas complexas / Multidirectional frequency response functions matrices assessment in complex structures
Este trabalho apresenta o desenvolvimento de uma metodologia para a estimativa de funções de resposta em freqüência angulares (FRFAs). Trata-se de uma técnica que utiliza transdutores piezelétricos (PZT) do tipo bimorph para a medição da curvatura local da estrutura através do potencial elétrico induzido pela extensão e compressão do sensor. A pa
Publicado em: 2008
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5. Movimentos sob atração focal em campos vetoriais planares / Motions under focal attraction in planar vector fields
Neste trabalho, desenvolvemos o artigo On the motion under focal attraction in a rotating mediumde J. Sotomayor [9] que trata de um sistema de equações diferenciais bidimensional que modela o seguinte problema na Biologia: num recipiente raso de seção circular, com líquido, girando a uma velocidade angular ω, existem platelmintos, organismos vermif
Publicado em: 2008
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6. Movimentos sob atração focal em campos vetoriais planares / Motions under focal attraction in planar vector fields
In this work, we develop the article On the motion under focal attraction in a rotating medium, of J. Sotomayor, which deals with a bidimensional differential system that model the following Biological problem: in a shallow recipient with circular section, with liquid in, spinning with angular speed ω, there are platyhelminthes, flatworms organisms, the
Publicado em: 2008
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7. LINEAR ULTRASONIC MOTOR WITH TUBULAR GEOMETRY / MOTOR ULTRA-SÔNICO LINEAR COM GEOMETRIA TUBULAR
This work presents the study on a linear ultrasonic motor with tubular geometry for linear displacements. Similar topologies, reported elsewhere, are conceived for producing rotary motions. Due to some particular characteristics of this geometry, not explored yet, a new study on interaction between resonance modes in a hollow cylinder for linear movement gen
Publicado em: 2008
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8. Subnanosecond motions of tryptophan residues in proteins
The dynamics of protein molecules in the subnanosecond and nanosecond time range were investigated by time-resolved fluorescence polarization spectroscopy. Synchrotron radiation from a storage ring was used as a pulsed light source to excite the single tryptophan residue in a series of proteins. The full width at half maximum of the detected light pulse was
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9. ATP-driven stepwise rotation of FoF1-ATP synthase
FoF1-ATP synthase (FoF1) is a motor enzyme that couples ATP synthesis/hydrolysis with a transmembrane proton translocation. F1, a water-soluble ATPase portion of FoF1, rotates by repeating ATP-waiting dwell, 80° substep rotation, catalytic dwell, and 40°-substep rotation. Compared with F1, rotation of FoF1 has yet been poorly understood, and, here, we anal
National Academy of Sciences.
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10. Magnetic Resonance Studies on Membrane and Model Membrane Systems: Proton Magnetic Relaxation Rates in Sonicated Lecithin Dispersions*
We have used Fourier transform nuclear magnetic resonance methods to measure the spin-lattice and transverse relaxation times at 220 MHz of the choline N-methyl and the fatty-acid α-carbonyl, allyl, vinyl, methylene, and methyl protons of sonicated egg-yolk lecithin. Over the temperature range investigated the T1 values were, in general, similar to, but dif
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11. DNA sequence-dependent deformability deduced from protein–DNA crystal complexes
The deformability of double helical DNA is critical for its packaging in the cell, recognition by other molecules, and transient opening during biochemically important processes. Here, a complete set of sequence-dependent empirical energy functions suitable for describing such behavior is extracted from the fluctuations and correlations of structural paramet
The National Academy of Sciences.
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12. Oligosaccharide motion in erythrocyte membranes investigated by picosecond fluorescence polarization and microsecond dichroism of an optical probe.
Oligosaccharide chains on the surfce of human erythrocytes were labeled with the probe eosin 5-thiosemicarbazide. The probe was conjugated to aldehydes produced by oxidation of sialic acid and galactose residues. The probe is associated mostly with glycophorin A after sialic acid labeling, whereas multiple components, including band 3 and lipids, are labeled