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Peer Reviewed
See detailDesign and modeling of new PAF antagonists - 1,4-bis-(3',4',5'-trimethoxybenzoyl)-2-substituted carbonyloxymethyl piperazines
Heymans, Françoise; Lamouri, Aazdine; Batt, Jean-Pierre et al

in Journal of Lipid Mediators and Cell Signalling (1994), 10(1-2), 153-154

Detailed reference viewed: 9 (1 ULg)
Peer Reviewed
See detailDesign and modeling of new platelet-activating factor antagonists.2. Synthesis and biological activity of 1,4-bis-(3',4',5'-trimethoxybenzoyl)-2-alkyl and 2-alkoxymethylpiperazines
Tavet, Fabrice; Lamouri, Aazdine; Heymans, Françoise et al

in Journal of Lipid Mediators and Cell Signalling (1996), 15

Detailed reference viewed: 36 (1 ULg)
Peer Reviewed
See detailDesign and modeling of new platelet-activating factor antagonists.3. Relative importance of hydrophobicity and electronic distribution in piperazinic series
Heymans, Françoise; Dive, Georges ULg; Lamouri, Aazdine et al

in Journal of Lipid Mediators and Cell Signalling (1996), 15(2), 161-173

Detailed reference viewed: 11 (1 ULg)
Peer Reviewed
See detailDesign and modeling of new platelet-activating-factor antagonists.1. Synthesis and biological activity of 1,4-bis(3',4',5'-trimethoxybenzoyl)-2-[[(substituted carbonyl and carbamoyl)oxy]methyl]piperazines
Lamouri, Aazdine; Heymans, Françoise; Tavet, Fabrice et al

in Journal of Medicinal Chemistry (1993), 36(8), 990-1000

Detailed reference viewed: 14 (1 ULg)
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See detailDesign and modelisation of a straylight facility for space optical instrument
Mazy, Emmanuel ULg; Stockman, Yvan ULg; Hellin, Marie-Laure ULg

in SPIE (Ed.) 2012 Optical system Design (2012)

In the framework of instrument calibration, straylight issues are a critical aspect that can deteriorate the optical performances of instrument. To cope with this, a new facility is designed dedicated for ... [more ▼]

In the framework of instrument calibration, straylight issues are a critical aspect that can deteriorate the optical performances of instrument. To cope with this, a new facility is designed dedicated for in-field and far field straylight characterization: up to 10-8 for in-field and up to 10-10 for far field straylight in the visible to NIR spectral ranges. Moreover, from previous straylight test performed at CSL, vacuum conditions are needed for reaching the 10-10 rejection requirement mainly to avoid air/dust diffusion. The major constrains are to design a straylight facility either for in-field and out-field straylight measurements. That requires high dynamic range at source level and a high radiance point source allowing small diverging collimated beam. Moreover, the straylight facility has to be implemented into a limited envelope and has to be built with vacuum compatible materials and black coating. As checking the facility performance requires an instrument better than the facility itself, that is no easy to find, so that the performances have been estimated through a modelisation into a non sequential optical software. This modelisation is based on CAD importation of mechanical design, on BRDF characteristics of black coating and on statistical averaging of ray tracing at instrument entrance. [less ▲]

Detailed reference viewed: 152 (43 ULg)
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See detailDesign and modelisation of ASPIICS optics
Galy, Camille ULg; Fineschi, S.; Galano, D. et al

in Proc. SPIE Volume 9604 Solar Physics and Space Weather Instrumentation VI (2015, September 21)

In the framework of development of ASPIICS (Association of Spacecraft for Polarimetric and Imaging Investigation of the Corona of the Sun), the Centre Spatial de Liege is responsible of the optical design ... [more ▼]

In the framework of development of ASPIICS (Association of Spacecraft for Polarimetric and Imaging Investigation of the Corona of the Sun), the Centre Spatial de Liege is responsible of the optical design of the coronagraph and the optics will be manufactured by TOPTEC. The particularity of this coronagraph is to have an external occulter located 150 m ahead of the first imaging lens. This external occulter is re-imaged on an internal occulter which function is - as in a classical externally occulted Lyot coronagraph - to block the sun light diffracted by the external occulter and to reduce the straylight on the detector. The selection of this configuration is driven by the requirement to observe the corona as close as possible to the solar limb (i.e. 1 RSun) without imaging the limb itself. A requirement of 1.08 RSun is specified at optical design level to grant 1.2 Rsun at instrument level. The coronograph instrument is designed to have a field of view of 1.6° x 1.6° with a resolution of less than 6 arcsec. Its performances are limited by diffraction in a 530 – 590 nm wavelength range. This paper presents the optical design and demonstrates that by design the requirements are fulfilled within the misalignment, manufacturing and thermo-elastic error contributions. [less ▲]

Detailed reference viewed: 55 (31 ULg)
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Peer Reviewed
See detailDesign and Modelization of a convex grating for the hyperspectral imager Chandrayaan 2: spectral optimization based on free form profile
Sabushimike, Bernard ULg

in International Journal of Latest Research in Science and Technology (2016, April 20), 5(2), 69-74

For hyperspectral imaging, diffraction gratings based spectrometers exhibit high spectral resolution and optical performance. Among those spectrometers, the Offner type (which consists of an entrance slit ... [more ▼]

For hyperspectral imaging, diffraction gratings based spectrometers exhibit high spectral resolution and optical performance. Among those spectrometers, the Offner type (which consists of an entrance slit, two concave mirrors and convex grating) offers a lot of advantages. In this paper, we propose the design and modelization of a convex grating which covers a spectral band ranging from 0.7 μm to 5 μm with a minimum diffraction efficiency of 20% at 8 00 nm, 50% at 3000 nm and 25% at 5000 nm. For a so wide band, a grating with a single blaze cannot satisfy these requirements. Wewill therefore propose an approach of multi-blaze grating which is subdivided intodifferent sections each with its own blaze angle. Meanwhile, we perform the diffraction efficiency prediction using the scalar and rigorous theories to prove the compliance of this design with the technical specifications. The rigorous theory will also allow us to study the polarization sensitivity of this grating and the calculation of the diffraction efficiency of a grating with a profile degraded by manufacturing errors to assess the impact on the diffraction efficiency and the sensitivity to polarization. [less ▲]

Detailed reference viewed: 22 (12 ULg)
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Peer Reviewed
See detailDESIGN AND MODELIZATION OF ACONVEX GRATING FOR AN HYPERSPECTRAL IMAGER OF THE CHANDRAYAAN 2 INSTRUMENT FOR THE MOON PROBE IN THE INFRARED
Sabushimike, Bernard ULg; Horugavye, Georges ULg; Piron, Pierre ULg et al

in International Journal of Latest Research in Science and Technology (2016), 5(2), 69-74

For hyperspectral imaging, diffraction gratings based spectrometers exhibit high spectral resolution and optical performance. Among those spectrometers, the Offner type (which consists of an entrance slit ... [more ▼]

For hyperspectral imaging, diffraction gratings based spectrometers exhibit high spectral resolution and optical performance. Among those spectrometers, the Offner type (which consists of an entrance slit, two concave mirrors and convex grating) offers a lot of advantages. In this paper, we propose the design and modelization of a convex grating which covers a spectral band ranging from 0.7 μm to 5 μm with a minimum diffraction efficiency of 20% at 800 nm, 50% at 3000 nm and 25% at 5000 nm. For a so wide band, a grating with a single blaze cannot satisfy these requirements. We will therefore propose an approach of multi-blaze grating which is subdivided into different sections each with its own blaze angle. Meanwhile, we perform the diffraction efficiency prediction using the scalar and rigorous theories to prove the compliance of this design with the technical specifications. The rigorous theory will also allow us to study the polarization sensitivity of this grating and the calculation of the diffraction efficiency of a grating with a profile degraded by manufacturing errors to assess the impact on the diffraction efficiency and the sensitivity to polarization [less ▲]

Detailed reference viewed: 65 (24 ULg)
Peer Reviewed
See detailDesign and modelling of SOI-Based solar thermoelectric generators
de Leon, MT; Kraft, Michael ULg

in Proc. Eurosensors XXVI Conference (2013, September)

Detailed reference viewed: 13 (2 ULg)
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See detailDesign and performances of the heliospheric imager for the STEREO mission
Mazy, Emmanuel ULg; Halain, Jean-Philippe ULg; Defise, Jean-Marc ULg et al

in Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series (2005)

The Heliospheric Imager (HI) is part of the SECCHI suite of instruments on-board the two STEREO spacecrafts to be launched in 2006. Located on two different orbits, the two HI instruments will provide ... [more ▼]

The Heliospheric Imager (HI) is part of the SECCHI suite of instruments on-board the two STEREO spacecrafts to be launched in 2006. Located on two different orbits, the two HI instruments will provide stereographic images of solar coronal plasma and coronal mass ejections (CME) over a wide field of view (~90°), ranging from 13 to 330 solar radii (R[SUB]0[/SUB]). These observations complete the 15 R[SUB]0[/SUB] field of view of the solar corona obtained with the other SECCHI instruments (2 coronagraphs and an EUV imager). The HI instrument is a combination of 2 refractive optical systems with 2 different multi-vanes baffle system. The key challenge of the instrument design is the rejection of the solar disk light, with total straylight attenuation of the order of 10[SUP]-13[/SUP] to 10[SUP]-15[/SUP]. The optics and baffles have been specifically designed to reach the required rejection. This paper presents the SECCHI/HI opto-mechanical design, with the achieved performances. A test program has been run on one flight unit, including vacuum straylight verification test, thermo-optical performance test and co-alignment test. The results are presented and compared with the initial specifications. [less ▲]

Detailed reference viewed: 13 (1 ULg)
See detailDesign and perspectives of the permanent GPS network in Belgium
Brondeel, Marijke; Bruyninx, Carine; Sleewaegen, Jean-Marie et al

in Reports On Geodesy (1997), 7(27), 199-209

Detailed reference viewed: 22 (1 ULg)
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Peer Reviewed
See detailDesign and pharmacological evaluation of recently developed 6-substituted 3-bromophenyl 2-oxo-2H-1-benzopyran 3-carboxylate derivatives as putative inhibitors of cell invasion
Kempen, I.; Frankenne, F.; Telliez, A. et al

in Fundamental & Clinical Pharmacology (2004)

Detailed reference viewed: 10 (0 ULg)
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Peer Reviewed
See detailDesign and production of bone scaffolds with selective laser melting
Van Bael, Simon; Vandenbroucke, Ben; Kerckhofs, Greet ULg et al

in TMS 2009 138TH ANNUAL MEETING & EXHIBITION - SUPPLEMENTAL PROCEEDINGS, VOL 1: MATERIALS PROCESSING AND PROPERTIES (2009)

The use of bone scaffolds for treatment of large bone defects could be a solution for many disadvantages which are present with traditional care methods. The success of these scaffolds depends on its ... [more ▼]

The use of bone scaffolds for treatment of large bone defects could be a solution for many disadvantages which are present with traditional care methods. The success of these scaffolds depends on its internal structure and mechanical properties. To be able to conduct a reliable investigation on the effect of these parameters, an efficient production method is required which can produce controlled internal structures. The presented work examines the ability to produce Ti6Al4V bone scaffolds with selective laser melting. The bone scaffolds were produced with a pore size range of 400-900 mu m and beam size 200 mu m. To check the repeatability mechanical and geometrical tests were performed. [less ▲]

Detailed reference viewed: 87 (4 ULg)
Peer Reviewed
See detailDesign and production of Ti6Al4V bone scaffolds by selective laser melting
Van Bael, Simon; Kerckhofs, Greet ULg; Moesen, Maarten et al

Conference (2010)

Detailed reference viewed: 40 (4 ULg)
Peer Reviewed
See detailDesign and proof of communicating sequential processes
Gribomont, Pascal ULg

in PARLE Parallel Architectures and Languages Europe (1987)

Detailed reference viewed: 13 (0 ULg)
Peer Reviewed
See detailDesign and Representation of Suboptimum Methods for Radar Space-Time Adaptive Processing Techniques Using a Canonical Framework
De Grève, Sébastien; Lapierre, Fabian D.; Verly, Jacques ULg

Conference (2005)

Detailed reference viewed: 11 (0 ULg)
Peer Reviewed
See detailDesign and simulation of a Mechanical Amplifier for Inertial Sensing Applications
Kham, MN; Houlihan, R; Kraft, Michael ULg

in Proc. 6th Conf. on Modeling and Simulation of Microsystems (2004)

Detailed reference viewed: 33 (1 ULg)
Peer Reviewed
See detailDesign and simulation of a micromachined electrostatically suspended gyroscope
Damrongsak, Badin; Kraft, Michaël ULg

in The IET Seminar on MEMS Sensors and Actuators (2006, May)

Detailed reference viewed: 4 (0 ULg)