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173.331  Articles
1 of 17.334 pages  |  10  records  |  more records»
Rotors with high gyroscopic effects and low resonance frequencies caused by the blade wheel (blade frequencies) can lead to stabilization problems in the application field of turbomolecular pumps. If such a rotor is stabilized by active magnetic bearings,... see more

Recently, a number of research groups have paid much attention to the study of Floating Offshore Wind Turbines (FOWTs). Similar to other offshore structures, the FOWTs are subjected to irregular waves and wind loads which cause a dynamic response in the s... see more

On this paper is studied the stability and control of a Rotor Airplane, more specifically a MAV (Micro Air Vehicle) and how works the dynamics of flight of this unusual configuration of aircraft. It’s discussed the impact of the gyroscopic effect on stabi... see more

  Diagnosis based on peripheral blood smear plasmodium finding. All patients positive for Plasmodium were observed for 28 days: 0-3 (D0) to 3th (D3), 7th (D7), 14th (D14), 21th (D21) and 28th day (D28). Therapy of artesdiaquine on D0 to D2, while ... see more

In this article, we describe a method of the roller bearing lubrication regime prediction. It uses a mathematical model of the bearing based on the standard ISO/TS 16281 to obtain the external load distribution over the rolling elements. We consider the e... see more

Ball bearings are commonly used in high speed turbomachinery and have a critical influence on the rotordynamic behavior. Therefore, a simulation model of the bearing to predict the dynamic influence is essential. The presented model is a further step to d... see more

Offshore wind energy capitalizes on the higher and less turbulent wind speeds at sea. To enable deployment of wind turbines in deep-water locations, structures are being explored, where wind turbines are placed on a floating platform. This combined struct... see more

This paper discusses the implementation of national and municipal assessment systems in Brazil, and how it has influenced the educational debate and newly shaped policies. The empirical analyses focus on public municipal schools in Rio de Janeiro and test... see more

In 21st century is known for its rapidly developing technology, knowledge, and skills. In 21st century education demands the creation of quality human resources. The government's effort in handling case 21st used the application of the 2013 curriculum. On... see more

1 of 17.334 pages  |  10  records  |  more records»