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See detailAppui Institutionnel Université du Rwanda
Marini Djang'Eing'A, Roland ULg

Report (2014)

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See detailImproving halva quality with dietary fibres of sesame seed coats and date pulp, enriched with emulsifier
Elleuch, Mohamed; Bedigian, Dorothea; Maazoun, Bouthaina et al

in Food Chemistry (2014), 145

Supplementation of halva with waste products of manufacturing, for example defatted sesame seed coats (testae) and date fibre concentrate, can improve its nutritional and organoleptic qualities. These ... [more ▼]

Supplementation of halva with waste products of manufacturing, for example defatted sesame seed coats (testae) and date fibre concentrate, can improve its nutritional and organoleptic qualities. These constituents provide high fibre content and technological potential for retaining water and fat. Standard halva supplemented with date fibre concentrate, defatted sesame testae and emulsifier was evaluated for oil separation, texture and colour changes, sensory qualities and acceptability to a aste panel. Addition of both fibres with an emulsifier, improved emulsion stability and increased the hardness of halva significantly. The functional properties of sesame testae and date fibres promote nutrition and health, supplying polyphenol antioxidants and laxative benefits. [less ▲]

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See detailSemiparametric Bayesian frailty model for clustered interval-censored data
Cetinyürek, Aysun ULg; Lambert, Philippe ULg

Report (2014)

The shared frailty model is one of the popular tool to analyze correlated right-censored time-to-event data. In the shared frailty model, the latent frailty is assumed to be shared by the members of a ... [more ▼]

The shared frailty model is one of the popular tool to analyze correlated right-censored time-to-event data. In the shared frailty model, the latent frailty is assumed to be shared by the members of a cluster and is assigned a parametric distribution, typically, a gamma distribution due to its conjugacy. However, in case of interval-censored time-to-event data, the inclusion of gamma frailties results in complicated intractable likelihoods, where the conjugacy property does not hold anymore. Here, we propose a semiparametric Bayesian frailty model for analyzing such data. We discuss three parametric specifications for frailty distribution in the analysis of interval-censored data. Afterwards we call particular attention to nonparametric specification of the frailty distribution. The results of the simulation study suggest that the proposed approach is robust to misspecification of the frailty distribution. Moreover, the performance of the proposed methodology is quite good in practical situations where the frailty distribution is multimodal or skewed. The approach is applied to dental data arising from the Signal Tandmobiel Study. [less ▲]

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See detailAdaptation ou trahison ? Réflexion sur le cinéma d'A. Kechiche
Hagelstein, Maud ULg

Conference given outside the academic context (2014)

Lors du déjeuner littéraire, nous discuterons de l'adaptation au cinéma de la bande dessinée de Julie Maroh, "Le bleu est une couleur chaude", publiée par Glénat en mars 2010. On pourra partir de ce qui ... [more ▼]

Lors du déjeuner littéraire, nous discuterons de l'adaptation au cinéma de la bande dessinée de Julie Maroh, "Le bleu est une couleur chaude", publiée par Glénat en mars 2010. On pourra partir de ce qui fait le propre des médias concernés - la bande dessinée et le cinéma - pour aborder leur rapport respectif à la temporalité et au récit. Dans ce cas précis, l'exercice d'adaptation est avant tout un effort de transcription entre des domaines d'expression aux moyens très différents. On abordera en priorité le rapport fiction/réalité, en décrivant les nombreux effets de décalage et de détournement : une histoire véritablement vécue est transformée en semi-fiction par le dessin, reprise ensuite par le réalisateur A. Kechiche. Celui-ci rend à l'histoire fictive un nouveau degré de réalité en provoquant une expérience cinématographique à la fois jouée et vécue par les actrices de son film. Entre le récit et la réalité, on a donc un système de renvois incessants, que l'on essaiera de décrypter pour montrer comment ce récit de passion gagne en intensité. [less ▲]

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See detailWood charcoal analysis: a relatively new tool for palaeoecology in tropical Africa
Morin-Rivat, Julie ULg; Biwole, Achille ULg; Bourland, Nils ULg et al

Scientific conference (2014, February 14)

This is an introduction about wood charcoal properties, collection and taxonomical identification in the framework of palaeoecological studies in Central Africa through examples of possible applications.

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See detailFormer une communauté discursive de la blague. Les conditions médiatiques du rire charivarique
Stienon, Valérie ULg

Scientific conference (2014, February 14)

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See detailScale-down effect on the extracellular proteome of Escherichia coli: correlation with membrane permeability and modulation according substrate heterogeneities
Brognaux, Alison ULg; Francis, Frédéric ULg; Twizere, Jean-Claude ULg et al

in Bioprocess and Biosystems Engineering (2014)

Protein leakage is induced in well-mixed fed-batch bioreactor by comparison with cultures carried out in scale-down conditions. This effect is attributed to a progressive increase of cell membrane ... [more ▼]

Protein leakage is induced in well-mixed fed-batch bioreactor by comparison with cultures carried out in scale-down conditions. This effect is attributed to a progressive increase of cell membrane permeability and the synthesis of several outer-membrane components allowing to cope with substrate limitation commonly found in high-cell density culture. A comparative analysis of protein leakage has thus been performed in well-mixed bioreactors and in scale-down devices. The extracellular proteome of E.coli has been investigated by 2D-gel electrophoresis and identified by subsequent MALDI-TOF analysis. On 110 picked spots, 67 proteins have been identified and the sub-localisation and the molecular function of these proteins have been determined. A majority of the extracellular proteome was composed of outer-membrane and periplasmic proteins (64%) confirming the fact that leakage is involved in high-cell density cultures. About 50% of this extracellular proteome was composed of transport and binding proteins. Furthermore, the more abundant spots on the gel corresponded to porin proteins and periplasmic transporters. In particular, the OmpC porin was found to be very abundant. Moreover, the scale-down effect on this extracellular proteome has been investigated by 2D-DIGE analysis (2-Dimensional Differential in-Gel Electrophoresis) and significant differences have been observed by comparison with culture carried out in well-mixed systems. Indeed, since substrate limitation signal is alleviated in this kind of apparatus, cell permeability was lowered as shown by flow cytometry. In scale-down conditions, protein leakage was thus less abundant. [less ▲]

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See detailRecent advances and improvements in computerized adaptive testing with the R package catR
Magis, David ULg; Barrada, Juan

Conference (2014, February 14)

The purpose of this talk is to present recent advances and developments of the R package catR. This package allows for random generation of response patterns under computerized adaptive testing (CAT) and ... [more ▼]

The purpose of this talk is to present recent advances and developments of the R package catR. This package allows for random generation of response patterns under computerized adaptive testing (CAT) and holds various options to select the first items, estimate ability, select the next item, stop the test and return final results. Two main improvements were realized. First, several rules for next item selection were added, among others, Kullback- Leibler, progressive and proportional methods. Second, catR was limited to dichotomous IRT models so far. The most recent update allows now for several polytomous IRT models, such as partial and generalized partial credit model, graded and modified graded response models, rating scale model, and nominal response model. All improvements will be shortly presented, both from a theoretical point of view and in terms of practical implementation in catR. If possible, several illustrative examples will be displayed in a short live demonstration of catR. [less ▲]

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See detailA short insight into the ecology of Pericopsis elata (Harms) Meeuwen (Fabaceae) in southeastern Cameroon
Bourland, Nils ULg; Doucet, Jean-Louis ULg

Scientific conference (2014, February 14)

Some key points of the autecology of Pericopsis elata in Southeastern Cameroon. Implications are given for the sustainable forest management of the species in the context of selective logging.

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See detailLes creux de l'historiographie rwandaise
Singiza, Dantès ULg

Scientific conference (2014, February 14)

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See detailLa discipline scolaire "français" : du questionnement identitaire à la conscience disciplinaire. Panorama sur les zones avancées de la francophonie et gros plan sur le cas particulier de l'enseignement du français au secondaire supérieur en Fédération Wallonie-Bruxelles
Van Beveren, Julien ULg

Doctoral thesis (2014)

Après avoir envisagé l'introduction de l'approche par compétences et l'élargissement du corpus des supports d'apprentissage du cours de français comme deux des causes possibles de la crise identitaire que ... [more ▼]

Après avoir envisagé l'introduction de l'approche par compétences et l'élargissement du corpus des supports d'apprentissage du cours de français comme deux des causes possibles de la crise identitaire que nous semble traverser cette discipline scolaire, nous nous sommes livré à l'analyse d'un grand nombre de livraisons de la revue de l'Association internationale des chercheurs en didactique du français, afin de nous interroger sur la rareté des publications ayant trait à la discipline scolaire "français" dans son ensemble. Dans la troisième partie de notre thèse, nous nous sommes penché sur la notion de discipline scolaire et sur quelques syntagmes qui y sont liés, avant de nous focaliser sur l'enseignement-apprentissage du français, au secondaire supérieur, en Fédération Wallonie-Bruxelles. Ajoutons que c'est surtout selon la perspective du didacticien-formateur que nous avons analysé cet enseignement-apprentissage. [less ▲]

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See detailCombining PET images and neuropsychological test data for automatic diagnosis of Alzheimer’s disease
Segovia-Román, Fermín ULg; Bastin, Christine ULg; Salmon, Eric ULg et al

in PLoS ONE (2014), 9(2),

In recent years, several approaches to develop computer aided diagnosis (CAD) systems for dementia have been proposed. Some of these systems analyze neurological brain images by means of machine learning ... [more ▼]

In recent years, several approaches to develop computer aided diagnosis (CAD) systems for dementia have been proposed. Some of these systems analyze neurological brain images by means of machine learning algorithms in order to find the patterns that characterize the disorder, and a few combine several imaging modalities to improve the diagnostic accuracy. However, they usually do not use neuropsychological testing data in that analysis. The purpose of this work is to measure the advantages of using not only neuroimages as data source in CAD systems for dementia but also neuropsychological scores. To this aim, we compared the accuracy rates achieved by systems that use neuropsychological scores beside the imaging data in the classification step and systems that use only one of these data sources. In order to address the small sample size problem and facilitate the data combination, a dimensionality reduction step (implemented using three different algorithms) was also applied on the imaging data. After each image is summarized in a reduced set of image features, the data sources were combined and classified using three different data combination approaches and a Support Vector Machine classifier. That way, by testing different dimensionality reduction methods and several data combination approaches, we aim not only highlighting the advantages of using neuropsychological scores in the classification, but also implementing the most accurate computer system for early dementia detention. The accuracy of the CAD systems were estimated using a database with records from 46 subjects, diagnosed with MCI or AD. A peak accuracy rate of 89% was obtained. In all cases the accuracy achieved using both, neuropsychological scores and imaging data, was substantially higher than the one obtained using only the imaging data. [less ▲]

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See detailQuelle plus-value retirer du système de prévention et protection au travail ?
Mairiaux, Philippe ULg

Conference given outside the academic context (2014)

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See detailDevelopment of educational info capsules proposing instructional strategies aiming to deal with overweight and obese students
Cloes, Marc ULg; LEBRETHON, Marie-Christine ULg; Feron, Isaline

Conference (2014, February 13)

Irwin et al. (2003) pointed out the principles that quality PE teachers should incorporate into their pedagogical practice in order to take into account the increasing number of overweight and obese ... [more ▼]

Irwin et al. (2003) pointed out the principles that quality PE teachers should incorporate into their pedagogical practice in order to take into account the increasing number of overweight and obese students in their classes. Fighting against obesity is so complex that no simple solution can be proposed. It means that the development of specific tools providing PE teachers with new instructional strategies inspired from public health is needed (Prusak et al., 2011). Inclusion of overweight students into PE can be linked with a social ecological model (Li & Rukavina, 2012). Even if PE teachers are able to develop and implement specific instructional strategies, it seems that they need support from health experts (Cloes et al., 2013). Internet, continuing professional development activities, and educational info capsules were identified as the preferred supports to be used by the practitioners (Cloes et al., 2014). The aims of this study were to produce and validate three pedagogical capsules focusing on specific concerns of PE teachers as well as to analyze the procedure of validation. Using an extensive analysis of the literature, the researchers first identified theoretical and practical resources to be mobilized in the understanding and development of solutions for the selected problems: (1) Students’ lack of awareness about the risks of overweight and obesity; (2) Constraints associated with the motor/physical disabling; (3) Parents’ lack of awareness about PA impact on health. The capsules were then submitted to 11 experts (health specialists, health educators, psychologists, PE teachers) who had to analyze the documents. They acknowledged the content and form of the capsules. Minor changes were requested in order to finalize them. The proposed evaluation sheet was also validated but face-to-face assessment was recommended. Dissemination of the existing capsules as well as development of additional ones should be the next steps of this project. [less ▲]

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See detailLes hiéroglyphes à l'heure de l'informatique
Winand, Jean ULg

Scientific conference (2014, February 13)

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See detailL'architecture Art nouveau à Liège (1895-1914)
Charlier, Sébastien ULg

Conference (2014, February 13)

Detailed reference viewed: 38 (1 ULg)