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See detailElucidation of non-parallel EIA curves
François-Gérard, C.; Gérard, Paul ULg; Rentier, Bernard ULg

in Journal of Immunological Methods (1988), 111(1), 59-65

Quantitative determinations by EIA can be only obtained by reverse regression when linear portions of sample and standard curves are parallel. However, analysis of complex biological fluids often yields ... [more ▼]

Quantitative determinations by EIA can be only obtained by reverse regression when linear portions of sample and standard curves are parallel. However, analysis of complex biological fluids often yields sigmoid curves displaying lower slopes, thus invalidating any quantitative interpretation. We hypothesized that this phenomenon was due to a competition effect between the target (for example an antigen) and related molecules for the binding sites (for example a capture antibody) immobilized onto the solid phase. This has been confirmed experimentally using various target-to-competitor ratios and formulated as a mathematical model. The slope decrease in target detection was related to the proportion of competitor, not in a linear, but in an exponential manner. This mathematical model has been computerized and can be used to correct aberrant sample curves provided the relevant parameters have been previously determined in the same systems. A competition effect should be suspected whenever non-parallel EIA sigmoid slopes are obtained. [less ▲]

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See detailElucidation of the gas vesicle gene clusters in cyanobacteria of the genus Arthrospira (Oscillatoriales, Cyanophyta) and correlation with ITS phylogeny
Miklaszewska, Magdalena; Waleron, Malgorzata; Morin, Nicolas et al

in European Journal of Phycology (2012), 47

The genus Arthrospira comprises filamentous cyanobacteria in which the trichomes form an open helix and contain gas vacuoles. The gas vesicle gene cluster of five Arthrospira strains was amplified by PCR ... [more ▼]

The genus Arthrospira comprises filamentous cyanobacteria in which the trichomes form an open helix and contain gas vacuoles. The gas vesicle gene cluster of five Arthrospira strains was amplified by PCR and sequenced. The genes are organized in one operon, in the order gvpA1–gvpC1–gvpA2–gvpC2–gvpA3–gvpC3–gvpN. In Arthrospira sp. strain PCC 8005, the genes gvpJ, gvpK, gvpV and gvpW were also identified. Each of the three copies of gvpA encodes a protein of 71 amino acids. In the case of gvpC, there are two different length variants. Each of the two shorter genes, gvpC1 and gvpC2, encodes a putative protein of 151 amino acids, while the longer one, gvpC3, codes for a putative protein of 284 residues. The amino acid sequences of GvpC1 and GvpC2 are identical to the N-terminal part of GvpC3. In spite of the presence of stop codons downstream of gvpC1 and gvpC2, the deduced amino acid sequences in these regions are highly similar to the C-terminal part of GvpC3 (residues 160 to 229). The GvpC1, GvpC2 and GvpC3 proteins contain contiguous repeats of 33 amino acids as previously reported for other cyanobacteria. The sequences of the gvpA1, gvpC1, gvpA2 and gvpC2 genes were not found in the genome data of Arthrospira sp. PCC 8005, A. maxima CS-328, and A. platensis NIES-39 as a result of incomplete assembly. The genes gvpN and gvpJ located downstream of gvpC3, encode putative proteins of 394 and 127 amino acids, respectively. The deduced amino acid sequences of gvpK, gvpV and gvpW contain 151, 112 and 227 residues, respectively. The analysis of gvp sequences of five strains of Arthrospira revealed the presence of polymorphic positions, which distinguished the strains in agreement with their previous assignments to ITS clusters I and II. This is the first report of gvp genes in members of the genus Arthrospira. [less ▲]

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See detailLes élus d'origine étrangère à Bruxelles: une nouvelle étape de la participation politique des populations d'origine immigrée
Martiniello, Marco ULg

in Revue Européenne des Migrations Internationales (1998), 14(2), 123-149

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See detailElusive Poets, Fugitive Texts. The Impact of the London Shelley Society in the Low Countries
Steyaert, Kris ULg

in Toremans, Tom; Verschueren, Walter (Eds.) Crossing Cultures. Nineteenth-Century Anglophone Literature in the Low Countries (2009)

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See detailElusiveness of evidence for multifragmentation in 1-GeV proton-nucleus reactions
Mancusi, D.; Boudard, A.; Cugnon, Joseph ULg et al

in Physical Review. C : Nuclear Physics (2011), 84(6),

We use the tools of hybrid intranuclear-cascade/nuclear-deexcitation models to evaluate the sensitivity of several physical observables to the inclusion of a multifragmentation stage in the deexcitation ... [more ▼]

We use the tools of hybrid intranuclear-cascade/nuclear-deexcitation models to evaluate the sensitivity of several physical observables to the inclusion of a multifragmentation stage in the deexcitation chain and assess the need for a multifragmentation model in the quantitative description of p + 56Fe and p + 136Xe reactions at 1-GeV incident energy. We seek clear signatures of multifragmentation by comparing different state-of-the-art deexcitation models coupled with intranuclear-cascade models and by focusing on discriminating observables such as correlations and fragment longitudinal-velocity distributions. None of the considered observables can be unambiguously interpreted as a multifragmentation footprint. The experimental data are best described as originating from sequential binary decays. However, no deexcitation model can reproduce the experimental longitudinal-velocity distributions from 1-GeV p + 136Xe. © 2011 American Physical Society. [less ▲]

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See detailThe elusiveness of multifragmentation footprints in 1-GeV proton-nucleus reactions
Mancusi, D; Boudard, A; Cugnon, Joseph ULg et al

in EPJ Web of Conferences (2012), 31

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See detailL'émancipation du Conseil de la Concurrence? Note sous la décision du Conseil de la concurrence du 26 mai 2009 dans l'affaire Base/BMB
Petit, Nicolas ULg; Provost, Elise ULg

in Tijdschrift voor Belgische Mededinging [=TBM] = Revue de la Concurrence Belge [=RCB] (2010), (2), 89-101

Enième avatar de la bataille juridique opposant les opérateurs alternatifs de communications électroniques à l’ancien monopole public Belgacom1, la décision commentée constitue une première pour Conseil ... [more ▼]

Enième avatar de la bataille juridique opposant les opérateurs alternatifs de communications électroniques à l’ancien monopole public Belgacom1, la décision commentée constitue une première pour Conseil de la concurrence (« le Conseil ») à plus d’un titre : première condamnation de l’opérateur historique, première caractérisation d’un ciseau tarifaire abusif, première décision infligeant une amende aussi élevée en Belgique. Après des années de carence dans l’application des règles de concurrence au secteur des communications électroniques le Conseil parait vouloir renverser la vapeur. Sonne peut-être – comme nous l’avons écrit précédemment – la « fin de la récréation pour l’opérateur historique ». Il faut sans doute s’en féliciter, la Belgique figurant depuis longtemps parmi les mauvais élèves de l’ouverture à la concurrence des industries de réseaux. [less ▲]

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See detailÉmancipation et diffusion du français (16e s.)
Boutier, Marie-Guy ULg; Mazziotta, Nicolas ULg

Learning material (2005)

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See detailThe Emancipation of Women in Ancient Rome
Gerkens, Jean-François ULg; Vigneron, Roger

in Revue Internationale des Droits de l'Antiquité [= RIDA] (2000), 47

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See detailL'emballement Internet
Durand, Pascal ULg

Scientific conference (1995, October 23)

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See detailL'embauche et le licenciement confrontés à la vie personnelle du salarié en droit belge
Kefer, Fabienne ULg

in Prof. Dr. Ali Güzel'e Armagan (2010)

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See detailEmbedding Generalization in the Framework of a Large Scale Map Database
Genin, Bernard; Hubert, Alain; Donnay, Jean-Paul ULg

in Proceedings of the Second Joint European Conference & Exhibition on Geographic Information (1996)

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See detailEmbedding Monte Carlo search of features in tree-based ensemble methods
Maes, Francis ULg; Geurts, Pierre ULg; Wehenkel, Louis ULg

in Flach, Peter; De Bie, Tijl; Cristianini, Nello (Eds.) Machine Learning and Knowledge Discovery in Data Bases (2012, September)

Feature generation is the problem of automatically constructing good features for a given target learning problem. While most feature generation algorithms belong either to the filter or to the wrapper ... [more ▼]

Feature generation is the problem of automatically constructing good features for a given target learning problem. While most feature generation algorithms belong either to the filter or to the wrapper approach, this paper focuses on embedded feature generation. We propose a general scheme to embed feature generation in a wide range of tree-based learning algorithms, including single decision trees, random forests and tree boosting. It is based on the formalization of feature construction as a sequential decision making problem addressed by a tractable Monte Carlo search algorithm coupled with node splitting. This leads to fast algorithms that are applicable to large-scale problems. We empirically analyze the performances of these tree-based learners combined or not with the feature generation capability on several standard datasets. [less ▲]

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See detailEmbedding ‘‘Science and Society’’ within Nanotechnologies’ Development
Thoreau, François ULg

Conference (2011, March 18)

These slides introduce nanotechnology as a voluntarist public policy. It addresses the societal dimensions of such policies, that is its social, ethical and legal aspects. It then focuses on one ... [more ▼]

These slides introduce nanotechnology as a voluntarist public policy. It addresses the societal dimensions of such policies, that is its social, ethical and legal aspects. It then focuses on one particular research project which aims at integrating such concerns into practices of research and development. Then, it raises issues, questions and ambiguities as for the role of social scientists in such a process. [less ▲]

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See detailEmbodiment effects in memory for facial identity and facial expression
D'Argembeau, Arnaud ULg; Lepper, Miriam; Van der Linden, Martial ULg

in Cognition & Emotion (2008), 22

Research suggests that states of the body, such as postures, facial expressions, and arm movements, play central roles in social information processing. This study investigated the effects of approach ... [more ▼]

Research suggests that states of the body, such as postures, facial expressions, and arm movements, play central roles in social information processing. This study investigated the effects of approach/avoidance movements on memory for facial information. Faces displaying a happy or a sad expression were presented and participants were induced to perform either an approach (arm flexion) or an avoidance (arm extension) movement. States of awareness associated with memory for facial identity and memory for facial expression were then assessed with the Remember/Know/Guess paradigm. The results showed that performing avoidance movements increased Know responses for the identity, and Know/Guess responses for the expression, of valence-compatible stimuli (i.e., sad faces as compared to happy faces), whereas this was not the case for approach movements. Based on these findings, it is suggested that approach/avoidance motor actions influence memory encoding by increasing the ease of processing for valence-compatible information. [less ▲]

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See detailEmbodying the divine: herms in Greek vase-painting
Collard, Hélène ULg

Conference (2014, March)

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See detail"Emboîtements cinématographiques : du prétexte narratif au discours imagé"
Belloi, Livio ULg

Conference (2011, August 25)

Si un récit romanesque peut accueillir en abyme une réplique en miniature (Lucien Dällenbach), si, dans le même esprit, un tableau de peinture peut ouvrir son espace à un autre tableau de peinture (Victor ... [more ▼]

Si un récit romanesque peut accueillir en abyme une réplique en miniature (Lucien Dällenbach), si, dans le même esprit, un tableau de peinture peut ouvrir son espace à un autre tableau de peinture (Victor Stoichita), l’image de cinéma n’est pas en reste à cet égard : très tôt, elle s’est mise au miroir, par le procédé devenu canonique du film dans le film. En pareil cas d’espèce, le film premier convoque un film second, identifiable ou non, qui en constitue la glose ou la mise en ironie, selon des structures de redoublement variables. J'aborde ce phénomène de métadiscursivité au travers de deux sites d’images spécifiques : d’une part, le cinéma des premiers temps ; de l’autre, le cinéma expérimental contemporain. Dans le champ du cinéma des premiers temps, il s’agit d’examiner des occurrences assez précoces de réflexivité, au sein desquelles l’image seconde tient essentiellement lieu d’embrayeur narratif. Ainsi, dans "Erreur tragique" (1912) de Louis Feuillade, le personnage principal, assistant à une projection dans une salle de cinéma, a la surprise de voir apparaître sa propre épouse à l’écran, au bras d’un autre homme – prélude à un intense mélodrame conjugal. S’agissant du cinéma expérimental contemporain, l’image seconde se prête généralement à un enchâssement plus complexe au sein du film qui l’inclut et obéit plutôt à une exigence d’interrogation critique du cinéma par lui-même. Ce cas de figure sera envisagé au travers de "Tails" (1976) de Paul Sharits, œuvre méconnue dans laquelle le cinéaste, prolongeant le geste pionnier de Ken Jacobs ("Tom, Tom, the Piper’s Son", 1969), refilme des fragments de pellicule en mouvement et libère l’image seconde des contraintes imposées par le dispositif de projection, la mettant en situation de discourir muettement sur les propriétés physiques du film qui l’expose. [less ▲]

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See detailL'embolie pulmonaire
D'Orio, Vincenzo ULg; NALDI, Marco ULg

in Revue Médicale de Liège (1989), 24

Detailed reference viewed: 12 (5 ULg)