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See detailImprovement of oxygen transfert during Penicillium canescens cultivation in agitated fermenter.
Gaspar, A.; Strodiot, L.; Jacques, Ph. et al

Poster (1997, April)

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Peer Reviewed
See detailImprovement of parathyroid lesion visualization in primary hyperparathyroidism with 99mTc-MIBI pinhole SPECT: comparison with conventional SPECT and planar scintigraphy.
Ansquer, C.; Mirallié, E.; Oudoux, A. et al

in European Journal of Nuclear Medicine and Molecular Imaging (2006), 33(S2), 100

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See detailImprovement of Physicians’ Patient-Centeredness: An Empirical Evidence of the Benefits of a Communication Skills Training Program
Jonius, Bénédicte ULg

Poster (2010, May 27)

Objectives. No study has yet assessed the benefits of a communication skills training program on patient-centeredness. The purpose of this study is to assess the association between ... [more ▼]

Objectives. No study has yet assessed the benefits of a communication skills training program on patient-centeredness. The purpose of this study is to assess the association between patients’characteristics and physicians’ communication skills before and after a communication skills training program. Methods. Correlations between physicians’ communication skills and patients’ characteristics were categorized as absent or present: the number of present correlations indicates the level of patientcenteredness. Communication skills were assessed during a consultation before and after a communication skills training program. Consultations were audio-recorded and transcripted. Communication skills were rated according to the Cancer Research Campaign Workshop Evaluation Manual. Patients’ characteristics (sociodemographic, physical and psychological) were measured before and after the training program. Results. Sixty-three physicians were included. Before training, physicians’ communication skills were associated with one patients’ sociodemographic characteristic and with one psychological characteristic. After training, physicians’ communication skills were associated with none of the patients’ sociodemographic characteristics and with four psychological characteristics. Conclusions. This study highlights that physicians’ patient-centeredness may be improved through a communication skills training program. After training, physicians are more centered on patients’ psychological characteristics and not on patients’ sociodemographic characteristics anymore. This study underlines the need to design communication skills training which may further improve patient-centeredness. [less ▲]

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See detailImprovement of pretreatments and technologies for enzymatic hydrolysis of cellulose from industrial and agricultural refuse and comparison with acidic hydrolysis.
Paquot, Michel ULg; Thonart, Philippe ULg; Foucart, M. et al

Scientific journal (1984)

Chemical and enzymatic hydrolysis of cellulose are compared. Basic research on paper mill celluloses shows that it is mainly the endo- and exocellulase activities which are absorbed on the substrate. In ... [more ▼]

Chemical and enzymatic hydrolysis of cellulose are compared. Basic research on paper mill celluloses shows that it is mainly the endo- and exocellulase activities which are absorbed on the substrate. In the case of the Trichoderma reesei complex with Aspergillus niger beta-glucosidase, the exocellulase activity has proved to be the limiting factor in the design of a reactor which recycles the enzyme complex. Tests were carried out on various pretreatments for substrates of more complex chemical composition, such as straw, maize stalks, beet pulp. The rate and overall degree of hydrolysis, especially for straw, were improved by chemical treatments in combination with mechanical processes. A first pilot plant for straw hydrolysis was set up with the aim of attaining high sugar concn in the fermenter. [less ▲]

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See detailImprovement of Pull-in Voltage of Electromechanical Microbeams Using Topology Optimization
Lemaire, Etienne ULg; Duysinx, Pierre ULg; Rochus, Véronique ULg et al

in 3rd European Conference on Computational Mechanics (ECCM) (2006)

The present work is dedicated to the application of topology optimization in the coupled simulation of multiphysic field problems as in MEMS. Precisely, it describes how it is possible to maximize pull-in ... [more ▼]

The present work is dedicated to the application of topology optimization in the coupled simulation of multiphysic field problems as in MEMS. Precisely, it describes how it is possible to maximize pull-in voltage of an electromechanical microsystem for which the optimization domain is insulated from the electric field. The electromechanical coupling is modeled by the use of a monolithic analysis. The monolithic modeling combined with a Riks-Crisfield algorithm allows computing accurately the pull-in conditions. The optimization task is completed with the help of a sequential convex linear approximation schemes (CONLIN). [less ▲]

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See detailImprovement of pulmonary function in COPD horses due to environmental management
Vandenput, Sandrina ULg; Votion, Dominique ULg; Duvivier, D. H. et al

in Pflügers Archiv : European Journal of Physiology (1996), 432(4), 143

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See detailImprovement of randomized ensembles of trees for supervised learning in very high dimension
Joly, Arnaud ULg

Master's dissertation (2011)

Tree-based ensemble methods, such as random forests and extremely randomized trees, are methods of choice for handling high dimensional problems. One important drawback of these methods however is the ... [more ▼]

Tree-based ensemble methods, such as random forests and extremely randomized trees, are methods of choice for handling high dimensional problems. One important drawback of these methods however is the complexity of the models (i.e. the large number and size of trees) they produce to achieve good performances. In this work, several research directions are identified to address this problem. Among those, we have developed the following one. From a tree ensemble, one can extract a set of binary features, each one associated to a leaf or a node of a tree and being true for a given object only if it reaches the corresponding leaf or node when propagated in this tree. Given this representation, the prediction of an ensemble can be simply retrieved by linearly combining these characteristic features with appropriate weights. We apply a linear feature selection method, namely the monotone LASSO, on these features, in order to simplify the tree ensemble. A subtree will then be pruned as soon as the characteristic features corresponding to its constituting nodes are not selected in the linear model. Empirical experiments show that the combination of the monotone LASSO with features extracted from tree ensembles leads at the same time to a drastic reduction of the number of features and can improve the accuracy with respect to unpruned ensembles of trees. [less ▲]

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See detailImprovement Of Spray Deposit Homogeneity Using A Pwm Spray Controller To Compensate Horizontal Boom Speed Variations
Lebeau, Frédéric ULg; El Bahir, L.; Destain, Marie-France ULg et al

in Computers and Electronics In Agriculture (2004), 43(2),

Longitudinal spray distribution is mainly affected by the horizontal speed variations of the nozzles. Manufacturers classically try to reduce unwanted nozzles movements using horizontal boom suspension ... [more ▼]

Longitudinal spray distribution is mainly affected by the horizontal speed variations of the nozzles. Manufacturers classically try to reduce unwanted nozzles movements using horizontal boom suspension but these methods have performance and price limitations. This paper describes a spray controller aiming to compensate the effect of the horizontal boom movements on the spray deposits homogeneity. The controller is based on three main components: a control law describing the relationship between nozzle speed, nozzle flow and spray deposit; a real time measurement of the boom horizontal speed variations using micro-machined capacitive accelerometers, and pulse width modulation (PWM) nozzle flow actuators. To assess the feasibility of such a controller, a single nozzle prototype was developed and tested in the laboratory, using a nigrosine solution. Spray coverage was measured using image analysis for field representative nozzle speed variations. The spray coverage uniformity using the controller showed about 51% compensation of the variations observed without it. [less ▲]

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See detailImprovement of spray retention on barley leaves by adjuvants
Boukhalfa, Hassina dite Hafida ULg; Massinon, Mathieu ULg; Lebeau, Frédéric ULg

Poster (2013, April 18)

Adjuvants contribute to change the types of impact and thus the amount of spray retained by the leaves of the treated plant. We have performed tests of retention on barley plants on BBCH 12 stage and ... [more ▼]

Adjuvants contribute to change the types of impact and thus the amount of spray retained by the leaves of the treated plant. We have performed tests of retention on barley plants on BBCH 12 stage and small pieces of barley leaves at the same stage of growth. Spraying was done in three ways: water without adjuvant, water with Break-Thru® S240 and water with Li700®. The three slurries of fluorescein contained in an amount of 0.2 g / l. Fluorescein retained by the leaves in both cases is then measured by a spectrofluoremeter. The retention tests on whole plants show that it is tripled by the first adjuvant and doubled by the second. On the other side, on small pieces of barley leaves, the amount was increased by the use of surfactants but not to the same extend. This study concluded that the use of adjuvants in spray pesticides increases the amount of retention as a function of leaf area and the type of adjuvant. [less ▲]

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See detailImprovement of students’ motivation in a pe class. An action-research project
Cloes, Marc ULg; Viseur, C.; Motter, Pascale

in Klissouras, V.; Kellis, S.; Mouratidis, I. (Eds.) Proceedings of the 2004 Pre-Olympic Congress. Sport Science through the Ages. (2004, August)

Adolescents' motivation is a major concern of PE teachers. Many students, especially girls, are characterized by unmotivated behaviours in the gym. For two decades, quantitative research has been ... [more ▼]

Adolescents' motivation is a major concern of PE teachers. Many students, especially girls, are characterized by unmotivated behaviours in the gym. For two decades, quantitative research has been conducted to better understand the problem. More recently, some qualitative studies have been proposed. ... [less ▲]

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See detailImprovement of the barrier properties of Nafion® by fluoro-modified montmorillonite
Thomassin, Jean-Michel ULg; Pagnoulle, Christophe; Bizzari, Didier et al

in Solid State Ionics (2006), 177(13-14), 1137-1144

Montmorillonite (MMT) was modified by two types of cationic fluorosurfactants in order to improve compatibility with and dispersion within Nafion® membranes. Perfluoropolyether-containing cationic ... [more ▼]

Montmorillonite (MMT) was modified by two types of cationic fluorosurfactants in order to improve compatibility with and dispersion within Nafion® membranes. Perfluoropolyether-containing cationic surfactant improved efficiency, by improving the barrier properties of Nafion® towards methanol. Moreover, the fluoro-modified MMT had no deleterious impact on the ionic conductivity of the membranes in contrast to conventional organo-modified MMT. The performances of a small size fuel cell were accordingly improved. [less ▲]

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See detailImprovement of the cellulose hydrolysis yields and hydrolysate concentration by management of enzymes and substrate input
Jacquet, Nicolas ULg; Vanderghem, Caroline ULg; Blecker, Christophe ULg et al

in Cerevisia : Belgian Journal of Brewing and Biotechnology (2012), 37

In order to improve the hydrolysis of cellulose fiber and to obtain highly concentrated hydrolysate, two methods based on successive addition of enzyme and substrate were assessed. The first method, which ... [more ▼]

In order to improve the hydrolysis of cellulose fiber and to obtain highly concentrated hydrolysate, two methods based on successive addition of enzyme and substrate were assessed. The first method, which required only substrate addition, allowed to increase by 50% the hydrolysate concentration and to decrease by 30% enzyme units needed. The second method highlighted the ability to reach very high concentrated hydrolysate (up to 170 g/l) by simultaneous addition of enzyme and substrate. In parallel, relationships between some limiting factors and the yields of hydrolysis were investigated. In conclusion, viscosity evolution of cellulose suspension during hydrolysis step was investigated with an aim to improve the management of enzyme and substrate addition. [less ▲]

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See detailImprovement of the Composition of Tunisian Myrtle Berries (Myrtus 2 communis L.) Alcohol Extracts
Snoussi, A.; Ben haj Koubaier, H.; Essaidi, Ismahen et al

in Journal of Agricultural and Food Chemistry (2011), 3b2(9),

Detailed reference viewed: 17 (5 ULg)
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See detailImprovement of the current Version of the EC3 fot the lateral torsional buckling of unrestrained steel beams under fire condition
Vila Real, P. M. M.; Lopes, N.; Simoes da Silva, L. et al

in Franssen, Jean-Marc; Benichou; Kodur (Eds.) et al Proceedings of SiF'04: Third International Structures in Fire workshop (2004)

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See detailImprovement of the decision efficiency of the accuracy profile by means of a desirability function for analytical methods validation - Application to a diacetyl-monoxime colorimetric assay used for the determination of urea in transdermal iontophoretic extracts
Rozet, Eric ULg; Wascotte, Valentine; Lecouturier, Nathalie et al

in Analytica Chimica Acta (2007), 591(2), 239-247

Validation of analytical methods is a widely used and regulated step for each analytical method. However, the classical approaches to demonstrate the ability to quantify of a method do not necessarily ... [more ▼]

Validation of analytical methods is a widely used and regulated step for each analytical method. However, the classical approaches to demonstrate the ability to quantify of a method do not necessarily fulfill this objective. For this reason an innovative methodology was recently introduced by using the tolerance interval and accuracy profile, which guarantee that a pre-defined proportion of future measurements obtained with the method will be included within the acceptance limits. Accuracy profile is an effective decision tool to assess the validity of analytical methods. The methodology to build such a profile is detailed here. However, as for any visual tool it has a part of subjectivity. It was then necessary to make the decision process objective in order to quantify the degree of adequacy of an accuracy profile and to allow a thorough comparison between such profiles. To achieve this, we developed a global desirability index based on the three most important validation criteria: the trueness, the precision and the range. The global index allows the classification of the different accuracy profiles obtained according to their respective response functions. A diacetyl-monoxime colorimetric assay for the determination of urea in transdermal iontophoretic extracts was used to illustrate these improvements. [less ▲]

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See detailImprovement of the Detection of Neurodegenerative Alzheimer's Disease through a Specific Surface Chemistry Applied onto the Inner Surface of the Titration Well.
Mille, Caroline; Debarnot, Dominique; Zorzi, Willy ULg et al

in Journal of Biomaterials Science. Polymer Edition (2011)

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See detailImprovement of the interaction formulae for beam columns in Eurocode 3
Boissonnade, N.; Jaspart, Jean-Pierre ULg; Muzeau, J. P. et al

in Computers & Structures (2002), 80(27-30), 2375-2385

This paper presents a new proposal for beam-column interaction formulae initially based on second-order in-plane elastic theory, as an alternative to those proposed in the Eurocode 3 pre-standard [1]. It ... [more ▼]

This paper presents a new proposal for beam-column interaction formulae initially based on second-order in-plane elastic theory, as an alternative to those proposed in the Eurocode 3 pre-standard [1]. It has been derived according to the following requirements: theoretical background, clear physical meaning, consistency with the other related formulae of Eurocode 3 and accuracy. Besides that, the suggested formulae cover all required continuities: between the cross-section classes, from plasticity to elasticity as slenderness and axial force increase, and continuity between all the individual stability member checks and cross-section verifications. Further to the presentation of the formulae and their background, the good agreement of the proposal is shown through an extensive comparison with more than 15,000 results of finite element numerical simulations. (C) 2002 Civil-Comp Ltd. and Elsevier Science Ltd. All rights reserved. [less ▲]

Detailed reference viewed: 73 (4 ULg)