Anna Guerman

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1 Centre for Aerospace Science and Technologies, Department of Electromechanical Engineering, University of Beira Interior, Calçada Fonte do Lameiro, 6201-001 Covilhã, Portugal 2 Orientation and Motion Control Department, Keldysh Institute of Applied Mathematics, Miusskaya pl. 4, Moscow 125047, Russia 3 Centre of Physics, Department of Mathematics and(More)
Microvascular occlusion in sickle cell disease (SCD) is a multifactorial process. Disordered coagulation may play a role in the pathogenesis of vaso occlusive crisis (VOC). The aim of this study was to evaluate the patients and to investigate their Protein C (PC), Protein S (PS) and AT-III levels during normal and crisis periods. A total of 18 patients with(More)
1 Department of Electromechanical Engineering, Centre for Aerospace Science and Technologies, UBI, University of Beira Interior, Calçada Fonte do Lameiro, 6201-001 Covilhã, Portugal 2 Scientific Area of Mathematics, ESTGV, Polytechnic Institute of Viseu, Campus Politécnico, 3504-510 Viseu, Portugal 3 Department of Mathematics and Applications, School of(More)
The averaging method is one of the most powerful methods used to analyse differential equations appearing in the study of nonlinear problems. The idea behind the averaging method is to replace the original equation by an averaged equation with simple structure and close solutions. A large number of practical problems leads to differential equations with(More)
We study orbital dynamics of a compound solar sail, namely, a Simple Solar Photon Thruster and compare its behavior to that of a common version of sailcraft. To perform this analysis, development of a mathematical model for force created by light reflection on all sailcraft elements is essential. We deduce the equations of sailcraft’s motion and compare(More)
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