Publications related to Discrete geometry

Chiral kagome lattice from simple ditopic molecular bricks

Klaus Kern, Harald Brune, Uta Schlickum, Régis Decker

Self-assembly techniques allow for the fabrication of highly organized architectures with atomic-level precision. Here, we report on molecular-level scanning tunneling microscopy observations demonstrating the supramolecular engineering of complex, regular ...

American Chemical Society2008

Pedestrian detection by range imaging

Heinz Hügli

Remote detection by camera offers a versatile means for recording people activities. Relying principally on changes in video images, the method tends to fail in presence of shadows and illumination changes. This paper explores a possible remedy to these pr ...

2007

Finite-element analysis and comparison of the AC loss performance of BSCCO and YBCO conductors

Francesco Grilli, Bertrand Dutoit

The AC loss performance of two BSCCO and two YBCO conductors of different geometry, characterized by the same self-field critical current of 150 A, is analysed and compared quantitatively. The comparison is made using the finite-element method with a non-l ...

2006

Compositional model for predicting multilayer reflectances and transmittances in color reproduction

Mathieu Hébert

The color of materials such as paints, prints and glass may be characterized by a reflectance or a transmittance spectrum. Modeling their reflectance and their transmittance requires describing the interaction of light, from the light source to the observe ...

EPFL2006

The conformal alpha shape filtration

Mark Pauly

Conformal alpha shapes are a new filtration of the Delaunay triangulation of a finite set of points in &Rdbl;d. In contrast to (ordinary) alpha shapes the new filtration is parameterized by a local scale parameter instead of the global scale par ...

2006

Conformal alpha shapes

Mark Pauly

We define a new filtration of the Delaunay triangulation of a finite set of points in &Rdbl;d, similar to the alpha shape filtration. The new filtration is parameterized by a local scale parameter instead of the global scale parameter in alpha s ...

2005

Laplacian Operator, Diffusion Flow and Active Contour on non-Euclidean Images

Jean-Philippe Thiran, Pierre Vandergheynst, Xavier Bresson, Iva Bogdanova Vandergheynst

We propose here some basic approaches to direct processing of the

360^o

-images as we take into consideration the geometry of each one. Obviously, the geometry of each of these images is a consequence of the geometry of the sensor's mirror used. This tech ...

2005

Nanostenciling: a Versatile Approach for Surfaces Patterning

Jürgen Brugger, Marc Antonius Friedrich van den Boogaart

A versatile method for parallel nanoscale structures fabrication and patterning, using a combination of stencil-mask and pulsed-laser deposition (PLD) techniques is presented. A miniature shadow-mask with nano-apertures in a very thin microfabricated membr ...

2004

Complex Oxide Nanostructures by Pulsed Laser Deposition through Nanostencils

Jürgen Brugger, Marc Antonius Friedrich van den Boogaart

A flexible method for simultaneous nanoscale structures fabrication and patterning is described, using a combination of stencil mask and pulsed-laser deposition (PLD) techniques. A miniature shadow-mask with nano-apertures in a very thin microfabricated me ...

2004

Thermal optimization of micro-hotplates that have a silicon island

Nico de Rooij, Danick Briand

We have performed thermal measurements and electrothermal simulations (finite element modelling) with the aim of optimizing the power consumption and the temperature distribution of micro-hotplates for gas-sensing applications. A silicon island was added u ...

2002

Discrete geometry

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Chiral kagome lattice from simple ditopic molecular bricks

Pedestrian detection by range imaging

Finite-element analysis and comparison of the AC loss performance of BSCCO and YBCO conductors

Compositional model for predicting multilayer reflectances and transmittances in color reproduction

The conformal alpha shape filtration

Conformal alpha shapes

Laplacian Operator, Diffusion Flow and Active Contour on non-Euclidean Images

Nanostenciling: a Versatile Approach for Surfaces Patterning

Complex Oxide Nanostructures by Pulsed Laser Deposition through Nanostencils

Thermal optimization of micro-hotplates that have a silicon island

Chiral kagome lattice from simple ditopic molecular bricks

Pedestrian detection by range imaging

Finite-element analysis and comparison of the AC loss performance of BSCCO and YBCO conductors

The conformal alpha shape filtration

Laplacian Operator, Diffusion Flow and Active Contour on non-Euclidean Images

Conformal alpha shapes

Complex Oxide Nanostructures by Pulsed Laser Deposition through Nanostencils

Nanostenciling: a Versatile Approach for Surfaces Patterning

Compositional model for predicting multilayer reflectances and transmittances in color reproduction

Thermal optimization of micro-hotplates that have a silicon island