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- A. S. Conceição, L. P. de Queiroz, Sarah M. Lambert, Alfredo Pereira, Emilinha Borba
- Plant Systematics and Evolution
- 2007

We carried out genetic and morphometric analyses in 33 populations belonging to all nine described and one putative taxa of Chamaecrista subsect. Baseophyllum. Genetic variability was low in all… (More)

- A. S. Conceição, H. P. Oliveira, A. Sousa e Silva, D. Oliveira, A. P. Moreira
- 2007 IEEE International Symposium on Industrial…
- 2007

This paper presents a nonlinear model based predictive controller (NMPC) for trajectory tracking of a mobile robot. Methods of numerical optimization to perform real time nonlinear minimization of… (More)

- A. S. Conceição, J. A. Mir, J. M. Maia, J. M. F. dos Santos
- IEEE Transactions on Nuclear Science
- 2010

The Gas Electron Multiplier with a MIcromegas Gap Amplifying Structure (GEM-MIGAS) is obtained by the coupling of a GEM to a short induction gap, typically 50 μm , where additional charge… (More)

- A. S. Conceição, A. P. Moreira, P. J. Costa
- IEEE/ASME Transactions on Mechatronics
- 2009

This paper presents a nonlinear modeling approach for omnidirectional mobile robots. Three experimental methods of estimation of the parameters related to dynamic equations of the robot's model are… (More)

- J. A. Mir, J. M. Maia, +7 authors J. M. F. dos Santos
- IEEE Transactions on Nuclear Science
- 2008

A gas electron multiplier with a micro-induction gap amplifying structure (GEM-MIGAS) is formed when a conventional GEM is operated with a short induction gap, typically set at 50 mum. Experimental… (More)

- A. S. Conceição, J. A. Mir, Joaquim M. F. dos Santos
- IEEE Transactions on Nuclear Science
- 2011

In this work, the GEM-MIGAS configuration was investigated to evaluate its gain properties at elevated gas pressures using CF<sub>4</sub> and He/CF<sub>4</sub> mixtures. The experimental work… (More)

- A. S. Conceição, J. M. Maia, J. A. Mir, L. M. P. Fernandes, J. M. F. dos Santos
- IEEE Transactions on Nuclear Science
- 2008

A Gas Electron Multiplier with a Micro-Induction Gap Amplifying Structure (GEM-MIGAS) is formed when a conventional GEM is operated with a short induction gap, typically 50 mum. A three-dimensional… (More)

- H.N. da Luz, A. S. Conceição, +4 authors L. F. R. Ferreira
- IEEE Transactions on Nuclear Science
- 2009

Tetrafluoromethane (CF<sub>4</sub>) combined with Helium-3 is widely used as the filling gas for neutron detectors. CF<sub>4</sub> is generally known as an efficient gas for proton and tritium… (More)

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