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Peer Reviewed
See detailOn-line combination of dialysis and liquid chromatography for the automated determination of oxprenolol in human plasma
Toussaint, B.; Ceccato, Attilio ULg; Chiap, Patrice ULg et al

in Journal de Pharmacie de Belgique (1995), 50

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See detailOn-line Cough Recognizer System
Van Hirtum, Annemie; Aerts, Jean-Marie; Berckmans, Daniel et al

in Journal of the Acoustical Society of America (1999), 106(4:2), 2191

Until now the intelligent, controlled, and automated use of acoustic bio-responses in cattle houses as indicators of animal condition has been limited to human perception. Although the appearance of ... [more ▼]

Until now the intelligent, controlled, and automated use of acoustic bio-responses in cattle houses as indicators of animal condition has been limited to human perception. Although the appearance of coughing, sneezing, etc., may point to an environmental deficiency in the animal habitat or the presence of diseases amoung the cattle, in order to use this kind of acoustic information as a bio-response signal in practice it is necessary to develop a simple on-line algorithm. In this paper an on-line registration technique for pig coughing is presented. The application of a distance function to a spectral sound analysis allows us to distinguish coughing from other animal and environmental sounds like metal clanging, grunting, noise, etc. The sound database was collected on a group of six healthy animals [less ▲]

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See detailOn-line coupling of cyclodextrin mediated nonaqueous capillary electrophoresis to mass spectrometry for the determination of salbutamol enantiomers in urine
Servais, Anne-Catherine ULg; Fillet, Marianne ULg; Mol, Roelof et al

in Journal of Pharmaceutical & Biomedical Analysis (2006), 40(3), 752-757

The usefulness of the on-line coupling of nonaqueous capillary electrophoresis (NACE) with electrospray ionization (ESI) mass spectrometry (MS) using heptakis(2,3-di-O-acetyl-6-O-sulfo)-beta-cyclodextrin ... [more ▼]

The usefulness of the on-line coupling of nonaqueous capillary electrophoresis (NACE) with electrospray ionization (ESI) mass spectrometry (MS) using heptakis(2,3-di-O-acetyl-6-O-sulfo)-beta-cyclodextrin (HDAS-beta-CD) was demonstrated for the enantioselective determination of low concentrations of salbutamol in human urine. After optimization of several parameters, such as sheath-liquid composition and flow rate, nebulizing gas pressure, CE counter-pressure and position of the CE capillary outlet, a limit of quantification of 18 and 20 ng/ml was obtained for salbutamol enantiomers. Moreover, the relative standard deviation values for repeatability at a concentration of 30 ng/ml were below 7% for both enantiomers. Typical regression lines obtained after application of a simple linear regression model revealed a pod relationship between peak area and analyte concentration (with 0.9988 and 0.9966 as coefficients of determination). This paper proposes an easy to use and sensitive NACE-MS method to determine enantiomers of a basic chiral drug in biological fluids preceded by solid-phase extraction as sample cleanup. (c) 2005 Elsevier B.V. All rights reserved. [less ▲]

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See detailOn-Line Coupling of Partial Filling-Capillary Zone Electrophoresis with Mass Spectrometry for the Separation of Clenbuterol Enantiomers
Toussaint, B.; Palmer, M.; Chiap, Patrice ULg et al

in Electrophoresis (2001), 22(7), 1363-72

The on-line coupling of capillary zone electrophoresis with mass spectrometry (CZE-MS) for the separation of enantiomers is hampered by the presence of nonvolatile chiral selectors such as cyclodextrins ... [more ▼]

The on-line coupling of capillary zone electrophoresis with mass spectrometry (CZE-MS) for the separation of enantiomers is hampered by the presence of nonvolatile chiral selectors such as cyclodextrins in the separation buffer. This problem can be overcome by use of the partial filling technique where only a part of the capillary is filled with the separation buffer containing chiral selectors. Since the electroosmotic flow is almost completely suppressed at acidic pH, that dimethyl-beta-cyclodextrin is neutral, no free cyclodextrin would reach the MS detector when using a partially filled capillary. By this method, clenbuterol enantiomers were successfully resolved and separated from salbutamol (internal standard) in aqueous solution and in plasma samples. A solid-phase extraction (SPE) was used for the preparation of plasma samples before analysis. [less ▲]

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See detailOn-line Damage Assessment Using Operating Deflection Shapes
Pascual, Rodrigo; Golinval, Jean-Claude ULg; RAZETO, Mario

Conference given outside the academic context (1999)

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See detailOn-line flow cytometry profiling of Escherichia coli stress response
Brognaux, Alison ULg; Han, Shanshan; Sorensen, Soren et al

Conference (2013, February 08)

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See detailOn-line fruit grading according to external quality using machine vision.
Leemans, Vincent ULg; Magein, Hugo ULg; Destain, Marie-France ULg

in AgEng Warwick 2000 - Abstract part 1 - Agricultural engineering into the third millennium (2000, July)

This paper presents apple grading into four classes according to European standards. Two varieties were tested, the Golden delicious and the Jonagold. The image database included more than thousand images ... [more ▼]

This paper presents apple grading into four classes according to European standards. Two varieties were tested, the Golden delicious and the Jonagold. The image database included more than thousand images of fruits (528 Golden, 642 Jonagold) belonging to three categories Extra, I, II and to reject. The image grading was achieved in six steps : the image acquisition, the ground colour classification, the defect segmentation, the calyx and stem recognition, the defects characterisation and finally the fruit classification in quality classes. The proposed method for apple external quality grading showed correct classification rates of 78 and 72% respectively for Golden delicious and for Jonagold apples. Taking into account that the healthy fruits were far better graded and considering that this class was under represented, the results of the proposed method (an error rate reaching respectively 5 and 10%) are compatible with the requirements of the European standards. [less ▲]

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See detailOn-line fruit grading according to their external quality using machine vision
Leemans, Vincent ULg; Magein, Hugo ULg; Destain, Marie-France ULg

in Biosystems Engineering (2002), 83(4), 397-404

This paper presents apple grading into four classes according to European standards. Two varieties were tested: Golden Delicious and Jonagold. The image database included more than a 1000 images of fruits ... [more ▼]

This paper presents apple grading into four classes according to European standards. Two varieties were tested: Golden Delicious and Jonagold. The image database included more than a 1000 images of fruits (528 Golden Delicious, 642 Jonagold) belonging to the three acceptable categories-Extra, I and II-and the reject (each class represents, respectively, about 60, 10 and 20% of the sample size). The image grading was achieved in six steps: image acquisition; ground colour classification; defect segmentation; calyx and stem recognition; defects characterisation and finally the fruit classification into quality classes. The proposed method for apple external quality grading showed correct classification rates of 78 and 72%, for Golden Delicious and Jonagold apples, respectively. Taking into account that the healthy fruit were far better graded and considering that this class was under represented in the sample compared with the fruit population, the results of the proposed method (an error rate which drops to 5 and 10%, respectively) are compatible with the requirements of European standards. (C) 2002 Silsoe Research Institute. Published by Elsevier Science Ltd. All rights reserved. [less ▲]

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See detailAn On-line Glossary as a way to foster the construction of a common culture among urban experts, stakeholders and decision-makers
Teller, Jacques ULg

in Construction Innovation (2001), 1/4

Negotiation and public participation are a key aspect of present urban development projects. Argumentation support tools, based on the Toulmin logic, have often been presented as a way to increase the ... [more ▼]

Negotiation and public participation are a key aspect of present urban development projects. Argumentation support tools, based on the Toulmin logic, have often been presented as a way to increase the accountability of the debates between the different urban actors. It should still be assumed that any collaborative decision making requires some common culture to make the dialogue possible and constructive. Such a common understanding of basic terms, references and methods is often missing in present-day urban disputes, especially when complex issues like cultural heritage are at stake. The present paper discusses the relevancy of Web Glossaries as a way to build up such a common culture among urban experts, stakeholders and decision-makers. [less ▲]

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See detailOn-Line Measurement Validation and Performance Monitoring Using Robust Kalman Filtering Techniques
Dewallef, Pierre ULg; Léonard, Olivier ULg

in 5th European Conference on Turbomachinery - Fluid Dynamics and Thermodynamics - Conference Proceedings (2003, March)

In an on-line engine performance monitoring, two tasks must be simultaneously carried out: an on-line engine health parameter estimation and an on-line engine state variables estimation. Estimation of the ... [more ▼]

In an on-line engine performance monitoring, two tasks must be simultaneously carried out: an on-line engine health parameter estimation and an on-line engine state variables estimation. Estimation of the state variables constitutes a general application of the Extended Kalman Filter theory, while the health parameter estimation is a classical recurrent regression problem. Recent advances show that both problems can be solved by two Kalman filters working jointly. Such filters are usually named Dual Kalman Filters. The present contribution aims at using a modified dual Kalman filter to provide robustness. This procedure should be able to cope with as much as 20 to 30% of faulty data. The resulting on-line validation method has been applied to a turbofan model developed in the frame of the OBIDICOTE 1 project. Several tests have been carried out to check the performance monitoring capability and the robustness that can be achieved [less ▲]

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See detailOn-Line Performance Monitoring and Engine Diagnostic Using Robust Kalman Filtering Techniques
Dewallef, Pierre ULg; Léonard, Olivier ULg

in Proceedings of the ASME Turbo Expo 2003 (2003, June)

In this contribution, an on-line engine performance monitoring is carried out through an engine health parameter estimation based on several gas path measurements. This health parameter estimation makes ... [more ▼]

In this contribution, an on-line engine performance monitoring is carried out through an engine health parameter estimation based on several gas path measurements. This health parameter estimation makes use of the analytical redundancy of an engine model and therefore implies the knowledge of the engine state. As the latter is a priori not known the second task is therefore an engine state variable estimation. State variables here designate working conditions such as inlet temperature, pressure, Mach number, rotational speeds, . . . Estimation of the state variables constitutes a general application of the Extended Kalman Filter theory, while the health parameter estimation is a classical recurrent regression problem. Recent advances in stochastic methods [1] show that both problems can be solved by two Kalman filters working jointly. Such filters are usually named Dual Kalman Filters. The present contribution aims at using a dual Kalman filter modified to provide robustness. This procedure should be able to cope with as much as 20 to 30% of faulty data. The resulting online method is applied to a turbofan model developed in the frame of the OBIDICOTE 1 project. Several tests are carried out to check the performance monitoring capability and the robustness that can be achieved. [less ▲]

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See detailOn-line prediction of technological and organoleptic properties of beef by near infrared spectroscopy
Dotreppe, Olivier ULg; Lambotte, Sébastien; Leroy, Bernadette ULg et al

in Proceedings of the 48th International Congress of Meat Science and Technology (2002)

The aim of this study was to investigate the use of the NIR spectroscopy for on-line prediction of technological and organoleptic properties of beef in slaughterhouse. In this work, two different fibre ... [more ▼]

The aim of this study was to investigate the use of the NIR spectroscopy for on-line prediction of technological and organoleptic properties of beef in slaughterhouse. In this work, two different fibre optic probes - transmission and reflection - were compared. It can be concluded from this experiment when applied on-line that when applied on-line the NIR spectroscopy prediction of several meat quality parameters can be at less equal to those obtained directly on meat samples in the laboratory. Nevertheless, the performances varied according to the acquisition mode: the reflection and the transmission showing potentialities for prediction of colour and drip loss respectively. Before direct application on slaughterline for early meat quality prediction, the technique needs further adaptations in order to reduce the time of spectra acquisition and treatment. [less ▲]

Detailed reference viewed: 33 (2 ULg)