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See detailIn-orbit vibration testing of spacecraft structures
Poncelet, Fabien ULg; Kerschen, Gaëtan ULg; Golinval, Jean-Claude ULg

in International Conference on Noise and Vibration Engineering, Leuven, 2008 (2008)

In-orbit modal testing can be an interesting tool for the monitoring of spacecraft structures. In these applications, it is impossible to measure or to control the excitation resulting, for instance, from ... [more ▼]

In-orbit modal testing can be an interesting tool for the monitoring of spacecraft structures. In these applications, it is impossible to measure or to control the excitation resulting, for instance, from an impact with a small asteroid or from the working engines. Consequently the only realistic methodology must be an outputonly modal analysis, also called Operational Modal Analysis (OMA). This paper proposes another way of doing OMA where the post-processing (i.e. the physical modal parameter extraction) is simplified and automated. The methodology uses the Blind Source Separation (BSS) techniques which attempt to recover the source signals only from their observed mixtures. In case of structural dynamic responses, the source signals and the mixing matrix are equivalent to the modal coordinates and the mode matrix, respectively. The paper describes the complete methodology including the post-processing, and its feasibility is demonstrated using a numerical application modeling a truss satellite with the FE method. [less ▲]

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See detailIn-plane and out-of-plane holographic interferometry with multibeam photorefractive recordings in sillenite photorefractive crystals
Thizy, Cédric ULg; Georges, Marc ULg; Scauflaire, V. et al

in Delaye, Ph; Denz, C.; Mager, L. (Eds.) Photorefractive Effects, Materials, and Devices (2003, June)

In this paper we present results of the multiple beams recording in photorefractive crystals for multidirectional measurement of object displacement by holographic interferometry. Taking advantage of the ... [more ▼]

In this paper we present results of the multiple beams recording in photorefractive crystals for multidirectional measurement of object displacement by holographic interferometry. Taking advantage of the possibility to record several holograms in the photorefractive crystal without noticeable cross-talk and loss of signal-to-noise ratio, we demonstrate the applicability of this technique to high resolution metrology and nondestructive testing. A first part of the paper is devoted to metrological certification of the process. On the basis of known "in-plane" and "out-of plane" movements, we certify the measurement deconvolution algorithm and error. A second part will concern the measurement of thermo-mechanical composite material properties (Poisson coefficient, ...) with a compact transportable head using double recording illumination [less ▲]

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See detailIn-plane anisotropic vortex motion induced by a square array of antidots
Silhanek, Alejandro ULg; Van Look, L.; Raedts, S. et al

in Physica C: Superconductivity (2004), 404(1-4), 340-344

We report on electro-transport measurements on a Pb thin film with a square array of antidots, for the whole angular range of in-plane current orientations. We demonstrate that the interaction of a moving ... [more ▼]

We report on electro-transport measurements on a Pb thin film with a square array of antidots, for the whole angular range of in-plane current orientations. We demonstrate that the interaction of a moving flux line lattice with a periodic pinning potential, breaks the rotational symmetry and induces a guided vortex motion along the principal symmetry orientations of the pinning array. As a consequence, we found that for orientations different than the symmetry directions, the vortex velocity is not aligned with the Lorentz force. We show that this anisotropic vortex motion is temperature dependent and progressively fades out when approaching the normal state. (C) 2004 Elsevier B.V. All rights reserved. [less ▲]

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See detailIn-Shoe Foot Force Sensor to Assess Hoof Balance Determined by Radiographic Method in Ponies Trotting on a Treadmill
Caudron, I.; Grulke, Sigrid ULg; Farnir, Frédéric ULg et al

in Veterinary Quarterly (1998), 20(4), 131-5

Adaptation of an in-foot shoe force sensor and the gait analysis system 'Fscan' makes it possible to monitor the distribution of the vertical forces under the equine foot in motion. The aim of this study ... [more ▼]

Adaptation of an in-foot shoe force sensor and the gait analysis system 'Fscan' makes it possible to monitor the distribution of the vertical forces under the equine foot in motion. The aim of this study is to investigate the effects of two different trimmings on forces under the foot during the trot. The first one increased the height of the lateral hoof wall and the second one restored the mediolateral balance of the foot. These two trimmings were examined by using a radiographical method that quantifies the interphalangeal articular asymmetries due to asymmetrical bearing. The location of the centre of force of the weight-bearing foot and the distribution of the forces applied to the lateral and medial solar surfaces during a stride were analyzed. After optimal trimming, the centre of force of the weight-bearing foot tended to approach the centre of the palmar figure, perpendicular to the distal interphalangeal joint centre. The sum of the forces recorded under the lateral and medial parts respectively of the foot during one stride tended to balance out after corrective trimming. [less ▲]

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See detailIn-silico models of trabecular bone: a sensitivity analysis perspective
Mengoni, Marlène ULg; Sikora, Sebastien N.F.; d'Otreppe, Vinciane et al

in Geris, Liesbet; Gomez-Cabrero, David (Eds.) Uncertainty in Biology: a computational modeling approach (2014)

Detailed reference viewed: 96 (10 ULg)
See detailIn-situ & remote sensing studies of outer planet aurora
Badman, S.V.; Baines, K.H.; Bonfond, Bertrand ULg et al

Conference (2015)

The combination of in situ and remote sensing measurements of auroral processes has yielded a wealth of information about solar wind-magnetosphere-ionosphere coupling at the giant planets. Results from ... [more ▼]

The combination of in situ and remote sensing measurements of auroral processes has yielded a wealth of information about solar wind-magnetosphere-ionosphere coupling at the giant planets. Results from the 2014 joint HST-Cassini Saturn auroral campaign are highlighted to demonstrate some of the interesting features observed in situ and their auroral counterparts, including: (1) perturbations on tens of minutes timescales in the high latitude ion fluxes, magnetic field, broadband plasma waves, and auroral intensity; (2) corotating auroral intensifications and their correspondence with models of the planetary period oscillations based on magnetic field perturbations; and (3) sub-corotating auroral features and their relationship to ring current enhancements observed in Energetic Neutral Atom (ENA) observations [less ▲]

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See detailIn-Situ Nitroxide-Mediated Radical Polymerization (Nmp) Processes: Their Understanding and Optimization
Sciannamea, Valérie; Jérôme, Robert ULg; Detrembleur, Christophe ULg

in Chemical Reviews (2008), 108(3), 1104-26

Detailed reference viewed: 55 (3 ULg)
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See detailAn in-situ NMR analysis of the formation of P- and SiO2-doped TiO2 xerogels
Bodson, Céline ULg; Lambert, Stéphanie ULg; Cattoën, Xavier et al

Poster (2010, July)

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See detailIn-situ polymerization of monoethylenically unsaturated monomers with oligomeric or polymeric secondary amines
Detrembleur, Christophe ULg; Rüdiger, Claus; Meyer, Rolf-Volker

Patent (2004)

PROBLEM TO BE SOLVED: To provide a process for preparing a (co)oligomer or a (co)polymer. ; SOLUTION: The process for preparing a (co)oligomer or (co)polymer comprises forming a mixture containing a ... [more ▼]

PROBLEM TO BE SOLVED: To provide a process for preparing a (co)oligomer or a (co)polymer. ; SOLUTION: The process for preparing a (co)oligomer or (co)polymer comprises forming a mixture containing a monoethylencally unsaturated monomer of formula (M): HR<SP>1</SP>C=CR<SP>2</SP>R<SP>3</SP>, an oxidizing agent, at least one polymer or oligomer of formula (I), and an optional radical initiator and heating the mixture at 0-220[deg.]C. [less ▲]

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See detailThe in-situ polymerization of monoethylenically unsaturated monomers with oligomeric or polymeric secondary amines
Detrembleur, Christophe ULg; Rüdiger, Claus; Meyer, Rolf-Volker

Patent (2004)

The present invention relates to a new process for the preparation of well-defined random and block polymers or copolymers using hindered secondary amine-oligomers or polymers.

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See detailIn-situ polymerization of monoethylenically unsaturated monomers with secondary amines
Detrembleur, Christophe ULg; Gross, Thomas; Meyer, Rolf-Volker

Patent (2004)

PROBLEM TO BE SOLVED: To provide a novel process for producing a homopolymer, a random copolymer, or a block copolymer having a controlled molecular weight, a narrow molecular weight distribution, a high ... [more ▼]

PROBLEM TO BE SOLVED: To provide a novel process for producing a homopolymer, a random copolymer, or a block copolymer having a controlled molecular weight, a narrow molecular weight distribution, a high monomer conversion ratio, and a controlled structure. ; SOLUTION: The polymer having a controlled molecular weight, a narrow polydispersibility, a high monomer conversion ratio, and a controlled structure is produced by polymerizing a vinyl monomer during the formation of a mixture of a hindered secondary amine and an oxidizing agent at a relatively low temperature in a short reaction time. It is unnecessary to add a free radical initiator before polymerization. Further, it is unnecessary to preliminarily react the secondary amine with the oxidizing agent before adding the monomer. [less ▲]

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See detailIn-situ polymerization of monoethylenically unsaturated monomers with secondary amines
Detrembleur, Christophe ULg; Gross, Thomas; Meyer, Rolf-Volker

Patent (2004)

A process for the preparation of any of well-defined homopolymers, random and block copolymers is disclosed. The process that entails forming a mixture of monomers, a hindered secondary amine and an ... [more ▼]

A process for the preparation of any of well-defined homopolymers, random and block copolymers is disclosed. The process that entails forming a mixture of monomers, a hindered secondary amine and an oxidizing agent is characterized in the absence of any additional free-radical initiator. [less ▲]

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See detailIn-situ polymerization of monoethylenically unsaturated monomers with secondary amines
Detrembleur, Christophe ULg; Gross, Thomas; Meyer, Rolf-Volker

Patent (2004)

A process for the preparation of any of well-defined homopolymers, random and block copolymers is disclosed. The process that entails forming a mixture of monomers, a hindered secondary amine and an ... [more ▼]

A process for the preparation of any of well-defined homopolymers, random and block copolymers is disclosed. The process that entails forming a mixture of monomers, a hindered secondary amine and an oxidizing agent is characterized in the absence of any additional free-radical initiator. [less ▲]

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See detailIn-situ polymerization of monoethylenically unsaturated monomers with secondary amines
Detrembleur, Christophe ULg; Gross, Thomas; Meyer, Rolf-Volker

Patent (2004)

The present invention relates to a new process for the preparation of well-defined homopolymers, random and block copolymers using a mixture of a hindered secondary amine and an oxidizing agent, without ... [more ▼]

The present invention relates to a new process for the preparation of well-defined homopolymers, random and block copolymers using a mixture of a hindered secondary amine and an oxidizing agent, without any additional free-radical initiator. [less ▲]

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See detailIn-situ polymerization of monoethylenically unsaturated monomers with secondary amines
Meyer, Rolf-Volker; Gross, Thomas; Detrembleur, Christophe ULg

Patent (2004)

The present invention relates to a new process for the preparation of well-defined homopolymers, random and block copolymers using a mixture of a hindered secondary amine and an oxidizing agent, without ... [more ▼]

The present invention relates to a new process for the preparation of well-defined homopolymers, random and block copolymers using a mixture of a hindered secondary amine and an oxidizing agent, without any additional free-radical initiator. [less ▲]

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See detailIn-situ SAXS of resorcinol-formaldehyde gel formation: either colloid aggregation or microphase separation
Gommes, Cédric ULg; Roberts, Anthony; Goderis, Bart

Poster (2008, October)

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See detailIn-Source Decay during Matrix-Assisted Laser Desorption/Ionization Combined with the Collisional Process in an FTICR Mass Spectrometer
Asakawa, Daiki; Calligaris, David; Zimmerman, Tyler et al

in Analytical Chemistry (2013), 85

The type of ions detected after in-source decay (ISD) in a MALDI source differs according to the ion source pressure and on the mass analyzer used. We present the mechanism leading to the final ISD ions ... [more ▼]

The type of ions detected after in-source decay (ISD) in a MALDI source differs according to the ion source pressure and on the mass analyzer used. We present the mechanism leading to the final ISD ions for a Fourier transform-ion cyclotron resonance mass spectrometer (FTICR MS). The MALDI ion source was operated at intermediate pressure to cool the resulting ions and increase their lifetime during the long residence times in the FTICR ion optics. This condition produces not only c′, z′, and w fragments, but also a, y′, and d fragments. In particular, d ions help to identify isobaric amino acid residues present near the Nterminal amino acid. Desorbed ions collide with background gas during desorption, leading to proton mobilization from Arg residues to a less favored protonation site. As a result, in the case of ISD with MALDI FTICR, the influence of the Arg residue in ISD fragmentation is less straightforward than for TOF MS and the sequence coverage is thus improved. MALDI-ISD combined with FTICR MS appears to be a useful method for sequencing of peptides and proteins including discrimination of isobaric amino acid residues and site determination of phosphorylation. Additionally we also used new software for in silico elimination of MALDI matrix peaks from MALDI-ISD FTICR mass spectra. The combination of high resolving power of an FTICR analyzer and matrix subtraction software helps to interpret the low m/z region of MALDI-ISD spectra. Finally, several of these developed methods are applied in unison toward a MALDI ISD FTICR imaging experiment on mouse brain to achieve better results. [less ▲]

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See detailIn-tune versus out-of-tune: On the perception of pitch accuracy
Larrouy, Pauline ULg

Speech/Talk (2016)

Detailed reference viewed: 16 (1 ULg)