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See detailThe Potential of Digital Tools and Technologies in Architectural Heritage Research for an Inclusive Approach to Built Heritage
Eisazadeh, Negin ULg; Houbart, Claudine ULg; Hallot, Pierre ULg et al

Conference (in press)

In recent years, inclusive design (a.k.a. universal design or design for all) is one of the developed approaches which aim to consider the diverse human abilities and conditions in the design process. As ... [more ▼]

In recent years, inclusive design (a.k.a. universal design or design for all) is one of the developed approaches which aim to consider the diverse human abilities and conditions in the design process. As defined by the European Institute for Design and Disability (EIDD) ‘design for all’ is designing for diversity, social inclusion and equality. Considering the social and demographic changes in the 21st century, which include an international movement towards social inclusion and more specifically the rights of disabled people, an inclusive approach is turning into a necessity for today’s diverse and ageing society. In the case of architectural and urban heritage, the disabled people or in better words those with diverse sensory, mental or mobility abilities who differ from the general public, have the right to experience, interact with, and engage with heritage and its values. As part of an extensive interdisciplinary research on inclusive approaches to built heritage values, which connects the fields of architecture, history, conservation, inclusive design, and digital humanities, this paper investigates the potentials of incorporating digital tools and techniques in the different aspects of this research. The extensive study involves communication between researchers, relevant professional experts, and the historic built environment with the target community of disabled people and in this paper, the digital means to facilitate these interactions have been studied. As a step towards answering the question ‘what are suitable methods and tools for facilitating and acquiring insight into diversely abled people’s engagement with and understanding of architectural heritage and its values?’, it more specifically focuses on the interaction of the disabled people with the historic architecture and urban spaces. Additionally, in a more general approach, by linking the fields of digital humanities and architectural research, the existing tools for the different stages of research ranging from data collection and storage, data analysis, and dissemination are explored. By conducting and elaborating relevant research examples, this study shows how incorporating digital tools and techniques derived from Digital Humanities - such as retrieving data through APIs, textual analysis, creating and querying databases, and data visualization - can facilitate research in the field of architecture and built heritage. Moreover, in studying the relation between disability and the historic built environment, it indicates that acquiring knowledge on the potentials in practical digital tools for disabled people’s interaction with the built heritage, can have a significant impact on the research approach and findings. As for an inclusive approach to built heritage, the disabled people can be taken into account with their prospective extended digital abilities. Hence in today’s digital world, integrating the digital tools and technologies in architectural heritage research is not only a necessary practical mean for conducting research, but can also impact the theoretical approach, allowing to carry out extensive and innovative research in an efficient manner. [less ▲]

Detailed reference viewed: 39 (16 ULg)
See detailFleurs d’orange et encens pour la gloire du roi dans les fêtes françaises de 1622
De Marco, Rosa ULg

Conference (in press)

Orange Flowers and Incense to the Glory of the King in the French Festivals of 1622 The communication explores the way in which the festival apparatus establishes a sacred dimension in the ordinary space ... [more ▼]

Orange Flowers and Incense to the Glory of the King in the French Festivals of 1622 The communication explores the way in which the festival apparatus establishes a sacred dimension in the ordinary space and time of the city. We consider the immaterial devices of the spectacular apparatus: light, sound, with special attention to the smell, its iconic power and liturgical significance. The study is conducted on the iconographic and textual descriptions of two kind of celebrations which took place during the summer and autumn of 1622 in France: Louis’s triumphal entries following his victories against the Protestant rebels, and the solemnities for canonization of Jesuits Ignatius of Loyola and Francis Xavier, miles of catholic faith between Europe and Asia. In this historical perspective where sacred/secular points converge, these festivals contribute to shape the imago gloriae on the urban space through the ephemeral language of festival and its indelible poli-sensory effect on audience’s memory. [less ▲]

Detailed reference viewed: 17 (0 ULg)
See detailLe corps, le territoire et le temps du sujet borderline
Englebert, Jérôme ULg

Conference (2017, November 09)

Detailed reference viewed: 46 (2 ULg)
Peer Reviewed
See detailPoésie et cosmologie
Delville, Michel ULg; Bertrand, Jean-Pierre ULg

Conference (2017, October 25)

Detailed reference viewed: 28 (4 ULg)
See detailSelf et perspective en première personne
Englebert, Jérôme ULg; Monville, François

Conference (2017, October 06)

Detailed reference viewed: 19 (1 ULg)
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See detailA mathematical model of respiration under protective ventilation and extracorporeal CO2 removal therapy
Habran, Simon ULg; Desaive, Thomas ULg; MORIMONT, Philippe ULg et al

Conference (2017, September 27)

The aim of the present study is to build a mathematical model of the respiratory system connected to an extracorporeal CO2 removal device (ECCO2RD) to optimize the gas exchanges efficiency. The model must ... [more ▼]

The aim of the present study is to build a mathematical model of the respiratory system connected to an extracorporeal CO2 removal device (ECCO2RD) to optimize the gas exchanges efficiency. The model must be simple enough to provide rapid solutions and to estimate specific parameters from available clinical data. But it also must be complex enough to be able to simulate the respiratory system when protective ventilation is used and when this system is assisted by an ECCO2RD. [less ▲]

Detailed reference viewed: 43 (4 ULg)
See detailConférence d'ouverture : Sartre, la Conférence de Rome, 1964
Cormann, Grégory ULg; Bourgault, Jean

Conference (2017, September 22)

Detailed reference viewed: 14 (1 ULg)
Peer Reviewed
See detailLocals in the Wasteland: The Non-Intended Side Effects of (In)Sensible Local Participatory Technology Development.
Parotte, Céline ULg

Conference (2017, September)

Implementing high-level radioactive wastes programs on a territory remain a sensitive step for nuclear waste management organizations. At this stage, the preferred solution of radioactive wastes programs ... [more ▼]

Implementing high-level radioactive wastes programs on a territory remain a sensitive step for nuclear waste management organizations. At this stage, the preferred solution of radioactive wastes programs (geological disposal) and their technological developments become highly visible and this is why the new instruments and strategies such as participatory technology development (PDT) have been adopted to tackle the territorial development of geological disposal technology. Considering the coproduction between territory and program (Jasanoff 2004), this presentation focuses on two siting processes of radioactive wastes programs, in France and in Canada to analyze the influence of in(sensible) local participatory technology development strategy and the influence of invited critics (Wynne 2007) on the industrial project. Our results show that frameworks of the participatory technology development have been designed very differently (with or without publics). Consequently, two undesirable, mostly non-intended side effects of information local committees (non) integration have appeared. In France, a closed PDT transformed invited critics as non-invited one. In Canada, a weak engagement of publics has occurred with an opened PDT. In both case, new socio-technical adjustments have occurred in those programs. [less ▲]

Detailed reference viewed: 5 (0 ULg)
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See detailLandscape and hydrological controls on the downstream transport of dissolved organic matter in the Congo and Zambezi rivers
Lambert, T; Bouillon, S; Teodoru, CR et al

Conference (2017, August 20)

Detailed reference viewed: 18 (2 ULg)
See detailConstruction of high-resolution trace element time-series in Belgian speleothems by LA-ICP-MS
Allan, Mohammed ULg; verheyden, sophie; crucifix, michel et al

Conference (2017, August 17)

Speleothems, presented in Belgium, are now regarded as valuable archive of paelenvirenmental variations on the continents, offering a number of advantages relative to other continental climate proxy ... [more ▼]

Speleothems, presented in Belgium, are now regarded as valuable archive of paelenvirenmental variations on the continents, offering a number of advantages relative to other continental climate proxy recorders such as lake sediments. They are reliable continental archives of high interest due to their dating possibilities and their possibility to preserve multi-proxy records of environmental and climatic dynamics. Establishing high-resolution trace element time series in speleothems requires analytical techniques capable of representative sampling at sub-annual spatial resolution (on order of 22 µm in this study). In the Belgian Pere Noel cave (PN), high spatial resolution measurements of trace elements (e.g., Mg, Sr, Ba) were realized by using LA-ICP-MS and compared with results from lower resolution techniques (ICP-MS). The results from both techniques have been analysed in order to assess the capability of each technique to reconstruct climate changes at high resolution from PN stalagmite. Results showed that LA-ICP-MS technique allows a rapid analysis of multiple elemental concentrations, and uses minimal sample volume allowing for replicate sampling and availability of almost the entire original sample for other analyses. [less ▲]

Detailed reference viewed: 51 (0 ULg)
Peer Reviewed
See detailVoice use among music theory teachers
Schiller, Isabel ULg; Morsomme, Dominique ULg; Sfez, Lou et al

Conference (2017, August)

In Belgium, there is a particular group of music teachers referred to as music theory teachers. Working at music schools, they convey theoretical knowledge and practical musical skills to groups of ... [more ▼]

In Belgium, there is a particular group of music teachers referred to as music theory teachers. Working at music schools, they convey theoretical knowledge and practical musical skills to groups of individuals who learn music during their free-time. Even though music theory teachers use both speaking and singing voice intensively at work, little is known about their voice use profiles. This study investigated the vocal loading among French-speaking music theory teachers. Objectives were (1) to describe their professional and extra-professional vocal loading, (2) to determine the relationship between vocal loading and background noise level and (3) to investigate whether objectively measured vocal loading is reflected in music theory teachers’ auto-evaluation of their voice. Using voice dosimetry, 13 music theory teachers were monitored for one workweek. Parameters analysed were F0, voice sound pressure level (SPL), phonation time, vocal loading index (VLI) and background noise SPL. At the end of each monitoring day, subjects self-assessed their voice use by means of visual analogue scales. Results revealed (1) significantly higher vocal loading in the professional context than in the extra-professional context, (2) significant positive correlations between background noise level and the parameters F0, voice SPL and phonation time and (3) significant correlations between the VLI and auto-evaluation data (e.g. voice quality and vocal fatigue). These results highlight that teaching music theory is a profession with high vocal demands. At work, music theory teachers are exposed to high background noise, which seems to influence their voice use and may potentially contribute to the development of voice problems among this population. Visual analogue scales provide a promising tool to subjectively investigate vocal loading among music theory teachers. [less ▲]

Detailed reference viewed: 17 (1 ULg)
Peer Reviewed
See detailGiving an account of fictional discourse. Meinongian logics versus modal logics
Leclercq, Bruno ULg

Conference (2017, August)

Detailed reference viewed: 14 (1 ULg)
Peer Reviewed
See detailmstR: An R package to generate multistage testing designs
Magis, David ULg; Yan, Duanli; von Davier, Alina

Conference (2017, July 18)

Multistage testing (MST; Yan, von Davier & Lewis, 2014) has become an important framework of tailored testing. Similarly to computerized adaptive testing (CAT) it proposes an optimal routing of the ... [more ▼]

Multistage testing (MST; Yan, von Davier & Lewis, 2014) has become an important framework of tailored testing. Similarly to computerized adaptive testing (CAT) it proposes an optimal routing of the administered items according to the previous test taker’s responses. However, items are not selected and administered as single units but as modules (subsets). The main goal of MST consists in selecting the optimal path of modules across the successive stages of the test. Unfortunately, if various operational testing programs are nowadays considering MST for practical administrations, there is still very limited access to accurate software that can either treat or generate MST scenarios for research purposes. In this talk we succinctly present a new package from the R software, called mstR (Magis, Yan & von Davier, 2017). Built in the same spirit of the package catR for CAT designs, it permits to generate repeated response patterns under a predefined MST scenario by providing the set of modules and related item parameters, the number of stages and the connections between modules from successive stages. Several rules for optimal module selection and ability estimation (under IRT framework or based on test scores) are also available. This talk will mostly focus on the (non-technical) description of package mstR and its main features. An example will also be described as an illustration of this framework. [less ▲]

Detailed reference viewed: 32 (1 ULg)
Peer Reviewed
See detailUndoing Art
Delville, Michel ULg

Conference (2017, July 13)

Detailed reference viewed: 22 (1 ULg)
Peer Reviewed
See detailDimensions adaptatives des fonctionnements pervers et psychopathiques : une approche étho-phénoménologique
Englebert, Jérôme ULg

Conference (2017, July 10)

Notre objectif est de discuter des diagnostics du fonctionnement psychologique pervers et de la personnalité psychopathique. Si les versions récentes du DSM (IV et 5) ignorent ces diagnostics, la pratique ... [more ▼]

Notre objectif est de discuter des diagnostics du fonctionnement psychologique pervers et de la personnalité psychopathique. Si les versions récentes du DSM (IV et 5) ignorent ces diagnostics, la pratique clinique suggère de conserver ces deux entités présentant une finesse psychopathologique plus grande et un pouvoir discriminatif plus important que la personnalité antisociale. Nous souhaitons interroger les dimensions intrinsèquement adaptatives de ces deux entités, mais aussi relever leurs différences sur le continuum de l’adaptation. Nous chercherons, en effet, à démontrer que le principe d'adaptation est une dimension centrale et commune aux deux entités, mais qui « se joue » de façons différentes pour chacune. Le pervers est hyper-adapté à son interlocuteur tout en présentant des moments paradoxaux d'inadaptation. Le psychopathe, avec sa faculté de chosification de l'alter ego et ses compétences émotionnelles paradoxales, présente une adaptation plus solitaire. Dans une perspective inspirée des paradigmes éthologique et phénoménologique, nous tenterons de cerner les différences essentielles entre ces deux modes d’être-au-monde. [less ▲]

Detailed reference viewed: 80 (4 ULg)
Peer Reviewed
See detailOptimising workforce and energy costs by exploiting production flexibility
Cuvelier, Thibaut ULg; Louveaux, Quentin ULg

Conference (2017, July)

In a world where the electricity prices become more and more volatile, notably due to renewable energies, the industry is suffering from cost variations never seen before, especially when electro ... [more ▼]

In a world where the electricity prices become more and more volatile, notably due to renewable energies, the industry is suffering from cost variations never seen before, especially when electro-intensive. Nevertheless, the plants can significantly reduce this impact: some electro-intensive factories could shift their production to time periods where the electricity is cheaper, resulting in large savings. At the same time, the grid operator can remunerate this consumption adaptation as a flexibility service. Our research goal is to optimise the operations of a factory around this flexibility. We compute a production plan that adapts to price forecasts, but also flexibility levers that adjust this plan to react to unexpected price changes. We propose the unifying concept of reservoir to provide sufficiently good models for the plant's processes. Nevertheless, this methodology implies to have frequent production plan changes, which directly impacts the workers, as they may be asked to follow barely predictable schedules. This has a significant detrimental effect on their quality of life. As a consequence, the human aspect of flexibility must also be considered: we seek for production plans that consider both workforce and energy costs, and we then assign workers to work shifts while ensuring their well-being. This HR orientation is the most innovative contribution of this research project. [less ▲]

Detailed reference viewed: 52 (12 ULg)
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See detailThe grammaticalization of Russian taxonomic nouns
Kolyaseva, Alena ULg

Conference (2017, July)

Detailed reference viewed: 7 (0 ULg)
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See detailWEATHERING ON THE DEVONIAN SLATES AND CHARACTERIZATION OF A BENTONITE LAYER IN THE WESTERWALD (GERMANY)
Fontaine, François ULg; Hamaekers, Helen; Hoffmann, Andreas et al

Conference (2017, July)

The Westerwald region is one of the largest and oldest clay mining areas of Germany. Those deposits were formed during the Eocene and Oligocene as a result of the weathering, erosion and redeposition of ... [more ▼]

The Westerwald region is one of the largest and oldest clay mining areas of Germany. Those deposits were formed during the Eocene and Oligocene as a result of the weathering, erosion and redeposition of Devonian rocks. During the Miocene, intense volcanic activities led to a large basalt cover, protecting the clays from the erosion. The two main goals of this study are first to improve the knowledge on the weathering processes of the Devonian slates that led to the current setting of those clay deposits by studying the mineralogical and chemical composition of the clays with depth. The second goal is to characterize a bentonite layer underneath the Miocene basalt cover using quantitative X-ray diffraction, chemical analysis, BET, cation exchange capacity and scanning electron microscope. A 20 meter deep quarry mining the Devonian bedrock in southern Westerwald has been sampled on its entire depth. The XRD results show no significant variations of the mineralogy with depth, except for the phyllosilicates. The minerals of the < 2 μm fraction are illite, kaolinite, smectite and mixed-layers minerals (vermiculite-chlorite and illite-chlorite). The proportions of the minerals in the mixed-layers chlorite-vermiculite vary with depth. At the bottom of the quarry, the proportion of vermiculite is very low while in the top, the proportion of vermiculite is higher. This is explained by the degree of the weathering, logically more intense at the top of the quarry. Trace elements compositions are currently being investigated. A 3 meter thick greenish to brownish bentonite layer has been found in the eastern part of the Westerwald region. The XRD performed on different samples of this bentonite shows a relatively heterogeneous composition: montmorillonite (60-80%), kaolinite (5-12%), illite (0-7%), goethite (2-15%), talc (0-10%), K-feldspars (0-7%), plagioclase (0-4%) and traces of amphibole and pyroxene. This bentonite is probably the result of the weathering of volcanic ashes. Since there are not many outcrops of this bentonite layer, its spatial distribution is studied by drilling. [less ▲]

Detailed reference viewed: 23 (2 ULg)
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See detailThe role of Gender, Race, and Class in Transnational Political Movements: Mexican and Colombian Women Engaging in Homeland Politics from Europe’s Capital
Lara-Guerrero, Larisa; Vivas Romero, Maria ULg

Conference (2017, June 30)

Drug trafficking is a mounting security problem in Latin America, specifically for the primary producers of narcotics in the region: Mexico and Colombia. The security concern from both countries has ... [more ▼]

Drug trafficking is a mounting security problem in Latin America, specifically for the primary producers of narcotics in the region: Mexico and Colombia. The security concern from both countries has triggered the political and social mobilization of Mexican and Colombian migrants from abroad many of them from the Global City of Brussels. This paper unpacks the motivations and dynamics behind transnational political activism organized by Mexican and Colombian women living in Brussels. By integrating and revising insights from social movements theories, political transnationalism from migration studies and intersectionality studies, this paper elaborates on the role of migrant women organizing and sustaining transnational political movements to change the political conditions of their countries of origin. The ethnographic evidence presented in this paper reveals the importance to recognize the individual level in the analysis of transnational movements. Women are cognitive actors with political ideals and emotions whose political activism is highly influenced by social categorizations such as gender, race, class, and generation. [less ▲]

Detailed reference viewed: 16 (2 ULg)
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See detailThe art to talk on immigration: a state of emergency
Da Silva, Amanda Carolina ULg

Conference (2017, June 29)

This paper intend to present the results of the state of emergency project. The project started in 2014 with a simple question: how researchers that work in immigration can communicate with civil society ... [more ▼]

This paper intend to present the results of the state of emergency project. The project started in 2014 with a simple question: how researchers that work in immigration can communicate with civil society outside the traditional academic channels? It is not only a matter of popularization of academic research, but mainly brings researchers into society, far from the academic walls. The answer to this question was the art and the spaces of culture. Art, and also cultural spaces have enormous potential, its could bring together different social groups and help researchers to be in society, and making their research accessible. In the society, debates on immigration are mostly dominated by media and political representations, what is also polarizing societies between solidarity and anti-immigration movement's. Therefore, the presence of researchers to discuss the immigration issue in society has become urgent. The state of emergency project had as a bases my research, “The borders of Nord-Pas-deCalais” (2014), and brought together two dancers, two acrobats, a scene director and a plastic artist. The project started from the assumption that art is a collective production, but artistic intention started with the individual consciousness on the issue the artist is focusing. It was adopted the artistic improvisation method to develop a spectacle and other tolls. In order to incorporate research on immigration into artistic production it was necessary to present and to appropriate the artists of basic concepts, but also carry out a fieldwork, that was developed during a month at the French border (Calais city). The methodology adopted by the artists consisted in a fieldwork. The project took two years to be concluded. The result was a dance spectacle, “Dites a ma mère que je suis la”, and a hybrid form of workshop that mixes the artistic and the methods of immigration research. I contrast, I developed during the project a multi-sited ethnography whit the artists. Where the main objective was to understand which impact the scientific knowledge on the issue could produce in artist's way to see immigration, and how this new approach could change the researcher and artist productions. [less ▲]

Detailed reference viewed: 15 (0 ULg)
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See detailCo-producing sociotechnical solutions in difficult times: the art of governing nuclear wastes in France
Parotte, Céline ULg; Delvenne, Pierre ULg

Conference (2017, June 29)

Radioactive wastes and their management are posing pressing political and epistemic issues to modern societies such as, for instance, how shall we design sociotechnical solutions to deal with an object ... [more ▼]

Radioactive wastes and their management are posing pressing political and epistemic issues to modern societies such as, for instance, how shall we design sociotechnical solutions to deal with an object with a half-life of more than 100.000 years? This paper’s starting point is the so-called “participatory turn” in the nuclear waste management (NWM) in France, when tensions appeared concerning claims of epistemic authority of national nuclear agencies. In 1990, in the aftermath of violent contestations and citizen mobilization in four Departments, the then Prime Minister of France, Michel Rocard, decided to impose a one-year moratorium on the research conducted by the national nuclear waste management organization (ANDRA). A not so well-known parliamentary technology assessment (PTA) institution, OPECST (the French Office Parlementaire d’Evaluation des Choix Scientifiques et Technologiques), was called to the rescue to clear up a difficult situation and to restore trust between state and scientific agencies and a critical population. We find that OPECST played a surprisingly central role in defining the French NWM program. [less ▲]

Detailed reference viewed: 15 (2 ULg)
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See detail"Exploring Experiences of Inequality in European Urban Centers: Towards an Intersectional and Transnational Approach."
Vivas Romero, Maria ULg; Ramos, Cristina

Conference (2017, June 28)

What strategies do migrants living in European cities use to challenge inequalities in access to healthcare, participation in the labor market and the creation of social support networks? The papers in ... [more ▼]

What strategies do migrants living in European cities use to challenge inequalities in access to healthcare, participation in the labor market and the creation of social support networks? The papers in this panel aim to respond to this question by drawing from transnational and intersectional approaches conceptualizing inequalities as sets of relationships between people and broader structures in which interactions generate better opportunity for some more than for others (Tilly, 2000). Panel participants consider that these interactions and the benefits that can be obtained through migration are affected by various social categories such as gender, class, sexual identity, transnational connections, and citizenship. Intersectional approaches allow to examine how these axes of inequality (Crenshaw, 1989; Anthias, 2001) simultaneously affect migration outcomes and also how they operate differently according to the geographical space in which they develop: origin and host societies as well as transnationally. Nonetheless, the papers presented in this panel will also emphasize migrants’ agency to resist or conform to the inequalities they face. Overall, this panel aims to contribute to the study of migration and inequality at the conceptual and methodological levels. At the theoretical level, the panel will build on new debates on the reproduction of intersectional inequalities in transnational settings (Faist, 2016, Amelina, 2017). At the methodological level, all paper presenters have use multi-sited ethnographic methods (working in cities such as Madrid, London, Milan, Brussels and Frankfurt) and will therefore use the panel as an opportunity to discuss the strengths and weaknesses of such method. [less ▲]

Detailed reference viewed: 42 (2 ULg)
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See detailLe contrôle du respect des droits fondamentaux de ses condamnés par la Cour pénale internationale : théorie et pratique naissante
Deprez, Christophe ULg

Conference (2017, June 23)

Cette présentation PowerPoint a servi de support à une communication orale dans le cadre de l'édition 2017 de la Conférence des Assistants en droit de Belgique (ACCA), organisée le 23 juin 2017 par l ... [more ▼]

Cette présentation PowerPoint a servi de support à une communication orale dans le cadre de l'édition 2017 de la Conférence des Assistants en droit de Belgique (ACCA), organisée le 23 juin 2017 par l'Université de Liège. [less ▲]

Peer Reviewed
See detailUHPLC-ESI-MS/MS quantitation of natural estrogens in aqueous matrices as pyridine-3-sulfonyl derivatives
Glineur, Alex ULg; Ronkart, Sébastien; Nott, Kathérine et al

Conference (2017, June 22)

Natural estrogens (estrone: E1, 17-β-estradiol : E2, estriol : E3) and synthetic estrogen (17-α-ethinylestradiol: EE2) are powerful endocrine disruptors. They may have deleterious effects on aquatic ... [more ▼]

Natural estrogens (estrone: E1, 17-β-estradiol : E2, estriol : E3) and synthetic estrogen (17-α-ethinylestradiol: EE2) are powerful endocrine disruptors. They may have deleterious effects on aquatic wildlife and also humans even at extremely low concentrations. For this reason, these molecules have been included in a watch list from the European Commission regarding emerging aquatic pollutants. The maximum detection limits are set at 0.035 and 0.40 ng/L for EE2 and E1, E2 respectively. Reaching such low levels of concentration of estrogenic compounds is a challenge, even using state-of-the-art analytical methods. In this study, we developed a UHPLC-ESI-MS/MS method allowing the quantification of E1, E2, E3 and EE2 residues in aqueous matrices. Studies commonly used ESI in negative mode albeit the poor ionization efficiency of native estrogenic compounds in this mode. In this study, the molecules were derivatised using a sulfonyl chloride reagent (pyridine-3-sulfonyl, P-3-S). The resulting response in the positive mode was significantly enhanced. Similarly to other dansyl derivatives, the product ion spectra of the P-3-S derivatives indicate ions originating from the derivatization reagent moiety. Moreover, several other ions were included in the product ion spectra of the P-3-S derivatives. Their specificity was assessed by a qualitative approach implying the analysis of different types of water samples (groundwater, surface water). Some product ions were found to be noticeably better for quantification and confirmation of the analytes. The developed analytical method was validated according to the NF T90-210 norm which is suitable to assess the performances of a method in the water quality field. The limits of quantification were 0.04, 0.05, 0.10 and 0.02 ng/L in groundwater and 0.89, 0.79,4.42 and 0.29 ng/L in surface water for E1, E2, E3 and EE2 respectively. [less ▲]

Detailed reference viewed: 34 (9 ULg)
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See detailLa comparaison en Belgique
Delville, Michel ULg

Conference (2017, June 22)

Detailed reference viewed: 18 (0 ULg)
See detailSeasonal Transport in Mars’ Mesosphere revealed by Nitric Oxide Nightglow
Stiepen, Arnaud ULg

Conference (2017, June 21)

We analyze the ultraviolet nightglow in the atmosphere of Mars through Nitric Oxide (NO) δ and γ bands emissions. On the dayside thermosphere of Mars, solar extreme ultraviolet radiation partly ... [more ▼]

We analyze the ultraviolet nightglow in the atmosphere of Mars through Nitric Oxide (NO) δ and γ bands emissions. On the dayside thermosphere of Mars, solar extreme ultraviolet radiation partly dissociates CO2 and N2 molecules. O(3P) and N(4S) atoms are carried by the day-to-night hemispheric transport. They preferentially descend in the nightside mesosphere in the winter hemisphere, where they can radiatively recombine to form NO(C2Π). The excited molecules promptly relax by emitting photons in the UV δ bands and in the γ bands through cascades via the A2Σ, v’ = 0 state. These emissions are thus indicators of the N and O atom fluxes transported from the dayside to Mars’ nightside and the winter descending circulation pattern from the nightside thermosphere to the mesosphere (e.g. Bertaux et al., 2005 ; Bougher et al., 1990 ; Cox et al., 2008 ; Gagné et al., 2013 ; Gérard et al., 2008 ; Stiepen et al., 2015, 2017). Observations of these emissions have been accumulated on a large dataset of nightside disk images and vertical profiles obtained at the limb by the Imaging Ultraviolet Spectrograph (IUVS, McClintock et al., 2015) instrument when the Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft is at its apoapsis and its periapsis phases along its orbit, respectively. We present discussion on the variability in the brightness and altitude and of the emission with season, geographical position and local time and possible interpretation for local and global changes in the mesosphere dynamics. IUVS images and limb scans reveal unexpected complex structure of the emission. The brightest emission is observed close to the winter pole. The emission is also surprisingly more intense in some longitude, revealing possible impact of tides and waves in Mars’ nightside mesosphere. Observations also reveal spots and streaks, indicating irregularities in the wind circulation pattern. The disk images and limb profiles are compared to the LMD-MGCM model (Gonzàlez-Galindo et al., 2009 ; Lopez-Valverde et al., 2011) to focus on the seasonal, local time and geographical influences on the NO Nightglow emission. We will also provide a statistical study of the regions of enhanced brightness (i.e. splotches and streaks) and discuss possible interpretation from the comparison to the GCM. [less ▲]

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See detailDiametral dimension(s) and prominent bounded sets
Demeulenaere, Loïc ULg

Conference (2017, June 20)

The classical diametral dimension (Bessaga, Mityagin, Pelczynski, Rolewicz), denoted by "Delta", is a topological invariant which can be used to characterize Schwartz and nuclear locally convex spaces ... [more ▼]

The classical diametral dimension (Bessaga, Mityagin, Pelczynski, Rolewicz), denoted by "Delta", is a topological invariant which can be used to characterize Schwartz and nuclear locally convex spaces. Mityagin also introduced a variant of this diametral dimension, denoted by "Delta_b", using bounded sets in its definition, contrary to "Delta". In this talk, we present some conditions assuring the equality of these two diametral dimensions for Fréchet spaces. Among these conditions, there is the notion of existence of prominent bounded sets, due to Terzioglu. In fact, it appears that the existence of prominent sets is implied by the property "Omega Bar" of Vogt and Wagner. Finally, we describe a construction which gives Schwartz and nuclear non-Fréchet spaces E verifying "Delta_b(E) = \Delta(E)". [less ▲]

Detailed reference viewed: 17 (1 ULg)
Peer Reviewed
See detailChromatographic analysis of alkaloids in Aconitum pollen : towards new insights in plant protection mechanisms
Vanderplanck, Maryse ULg; Glauser, Gaëtan; Tyteca, Eva ULg et al

Conference (2017, June 19)

Alkaloids are a class of naturally occurring organic nitrogen-containing bases that are found primarily in plants. They display a huge diversity with more than 3,000 different types already identified ... [more ▼]

Alkaloids are a class of naturally occurring organic nitrogen-containing bases that are found primarily in plants. They display a huge diversity with more than 3,000 different types already identified. Next to their different pharmacological and therapeutic effects, alkaloids can have a deleterious impact on organisms as they are known to be neurotoxic and cardiotoxic for mammals and insects. In the current context of worldwide bee decline, occurrence of such compounds in floral production, i.e. nectar and pollen, raises major concerns. They could be beneficial to bees by protecting them against disease and pathogens but they could also cause toxicity. Until now alkaloids, and their effect on human health, are mainly studied in vegetative parts of plants. More recently the natural occurrence of alkaloids in nectar was also studied to investigate their effect on bee health. Whereas nectar chemicals can relatively easily and quickly be analyzed by chromatography, extracting chemicals from low pollen amount remains a challenge because of pollen structure and complexity. However, characterization of pollen chemicals can lead to valuable insight in their impact on pollinators allowing the development of mitigation strategies. In this study, we used a UHPLC-(ESI)-Q-ToF/MS method allowing the identification and quantification of alkaloids in pollen matrices from four Aconitum species; A. lycoctonum, A. napellus compactum, A. napellus neomontanum and A. variegatum. Alkaloid extraction was performed using bead-beating disruption of the pollen sample and chromatographic analysis was carried out on an Acquity UPLC system interfaced with a Synapt G2 QTOF. The separation was achieved in gradient mode on an Acquity UPLC BEH C18 column and detection was performed in electrospray positive ionization mode (ES+). Alkaloid concentrations were measured as aconitine equivalents by using a pure aconitine standard as reference compound. The total amount of alkaloids in Aconitum pollen ranged from 0.75 to 1.20 mg/g with 859 different compounds detected, some of them being pollen-specific. Statistical analyses were conducted on the global dataset to assess both quantitative and qualitative interspecific differences. One-way analysis of variance was performed on the total alkaloid content while a permutational test of multivatiate analysis of variance was used to compare the alkaloid profiles among the four Aconitum species. Results are briefly discussed in an ecological context. [less ▲]

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See detailGeneralized Pascal triangles for binomial coefficients of finite words
Stipulanti, Manon ULg

Conference (2017, June 19)

We introduce a generalization of Pascal triangle based on binomial coefficients of finite words. These coefficients count the number of times a finite word appears as a subsequence of another finite word ... [more ▼]

We introduce a generalization of Pascal triangle based on binomial coefficients of finite words. These coefficients count the number of times a finite word appears as a subsequence of another finite word. Similarly to the Sierpiński gasket that can be built as the limit set, for the Hausdorff distance, of a convergent sequence of normalized compact blocks extracted from Pascal triangle modulo 2, we describe and study the first properties of the subset of [0, 1] × [0, 1] associated with this extended Pascal triangle modulo a prime p. Then we create a new sequence from this extended Pascal triangle that counts, on each row of this triangle, the number of positive binomial coefficients. We show that this sequence is 2-regular. To extend our work, we construct a Pascal triangle using the Fibonacci representations of all the nonnegative integers and we define the corresponding sequence of which we study the regularity. This regularity is an extension of the classical k-regularity of sequences. [less ▲]

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See detailRelevance of early stretching in overhead athletes
Schwartz, Cédric ULg; Tubez, François ULg; Croisier, Jean-Louis ULg et al

Conference (2017, June 16)

Overhead athletes often develop, over time, a tightness of the posterior structures of the shoulder, which may be associated with injuries. Ten symptomatic (with pain) and ten asymptomatic players with a ... [more ▼]

Overhead athletes often develop, over time, a tightness of the posterior structures of the shoulder, which may be associated with injuries. Ten symptomatic (with pain) and ten asymptomatic players with a tight shoulder were compared and the effect of a self-applied stretching program was evaluated. Before and after the stretching program, pain and stiffness of the shoulder were evaluated. Our results demonstrate that risk factors for shoulder pain such as glenohumeral internal rotation deficit and total range of motion deficit may only be limited in symptomatic athletes. The mobility of the shoulder was significantly improved after the stretching program for both groups. Pain was reduced when present. Because of the limited differences between the symptomatic and asymptomatic athletes, clinicians may find it advantageous to initiate early prevention or rehabilitation programs. [less ▲]

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See detailGeneralized Pascal triangles for binomial coefficients of finite words
Stipulanti, Manon ULg

Conference (2017, June 16)

We introduce a generalization of Pascal triangle based on binomial coefficients of finite words. These coefficients count the number of times a finite word appears as a subsequence of another finite word ... [more ▼]

We introduce a generalization of Pascal triangle based on binomial coefficients of finite words. These coefficients count the number of times a finite word appears as a subsequence of another finite word. Similarly to the Sierpiński gasket that can be built as the limit set, for the Hausdorff distance, of a convergent sequence of normalized compact blocks extracted from Pascal triangle modulo 2, we describe and study the first properties of the subset of [0, 1] × [0, 1] associated with this extended Pascal triangle modulo a prime p. Then we create a new sequence from this extended Pascal triangle that counts, on each row of this triangle, the number of positive binomial coefficients. We show that this sequence is 2-regular. To extend our work, we construct a Pascal triangle using the Fibonacci representations of all the nonnegative integers and we define the corresponding sequence of which we study the regularity. This regularity is an extension of the classical k-regularity of sequences. [less ▲]

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See detailFrammenti d’intonaci di I stile a Ostia Antica. Un lotto inedito proveniente dagli strati preparatori di un mosaico tardo-repubblicano (Domus dei Bucrani - Camera dei Nani)
Morard, Thomas ULg; Motta, Lucie ULg

Conference (2017, June 16)

Les fouilles entreprises durant les années 2002-2010 sur le site de la Schola del Traiano (IV, IV, 15) à Ostia Antica ont révélé l’existence d’une domus tardo-républicaine - la Domus aux Bucranes (60-20 ... [more ▼]

Les fouilles entreprises durant les années 2002-2010 sur le site de la Schola del Traiano (IV, IV, 15) à Ostia Antica ont révélé l’existence d’une domus tardo-républicaine - la Domus aux Bucranes (60-20 av. J.-C.) - dont le système décoratif de IIe style (pavements, enduits peints et reliefs de stuc, plafonds) est apparu exceptionnellement bien conservé dans les couches les plus profondes de la parcelle urbaine concernée. Ce système décoratif - actuellement en cours de publication - a déjà été présenté à la communauté scientifique lors de différents colloques et journées d’études internationales. Il n’est pas question d’y revenir dans le cadre de la prochaine rencontre de l’AIRPA. En revanche, nous souhaiterions y présenter un lot d’enduits peints de Ier style jetés pêle-mêle dans les couches de préparation du tapis de mosaïque de la Chambre des Nains - un oecus aménagé durant les années 40-30 au sein de cette même domus tardo-républicaine. Restés inédits jusqu’à ce jour, ces fragments comptent parmi les plus anciens jamais découverts à Ostia Antica et leur position stratigraphique - scellée entre deux pavements bien datés - offre à n’en pas douter matière à réflexion. L’ensemble de ces fragments a fait l’objet d’une documentation systématique et des analyses archéométriques ont été portées sur les mortiers et les pigments des éléments les plus significatifs. Ce sont les résultats de cette entreprise scientifique que nous souhaiterions présenter lors du colloque de l'Aquileia afin de pouvoir intégrer cet ensemble décoratif de Ier style dans un corpus plus large - une mise en relation étroite avec le matériel contemporain découvert dans le Latium. [less ▲]

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See detailImpact of 3’-sialyllactose and Bifidobacterium crudilactis on infant feces microbial composition and virulence modulation of Escherichia coli O157:H7, using the SHIME® gastrointestinal model
Bondue, Pauline ULg

Conference (2017, June 15)

Bifidobacterium crudilactis, a bacterial species from bovine origin, growths on bovine milk oligosaccharides (BMO). Cell free spent media (CFSM) from B. crudilactis and 3’-sialyllactose (3’SL), a major ... [more ▼]

Bifidobacterium crudilactis, a bacterial species from bovine origin, growths on bovine milk oligosaccharides (BMO). Cell free spent media (CFSM) from B. crudilactis and 3’-sialyllactose (3’SL), a major BMO, modulated Escherichia coli O157:H7 virulence gene expressiona. In this study, the SHIME® gastrointestinal model was inoculated with 4 different treatments: 3’SL (ttm1), B. crudilactis (ttm2), 3’SL and B. crudilactis (ttm3) and CFSM from 3’SL and B. crudilactis culture (ttm4). In each section of the colon, samples were collected and analysed for short chain fatty acid (SCFA) concentration using HPLC, microbial populations using 16S rDNA metagenetic analysis and correlated with E. coli O157:H7 virulence gene expression. The results showed that SCFA levels were stable during the experiments. Metagenetic analysis showed a microbial diversity in transverse (TC) and descending colon (DC) close to feces, dominated by Bacteroides, Prevotella and Fusobacterium, while the ascending colon (AC) showed a different microbial diversity dominated by Veillonella. Ttm4 and ttm2 induced mainly a down-regulation of virulence genes: fliC in DC with ttm4, and luxS, stx1, qseA in AC, DC or TC with ttm2. Ttm1 also showed a down-regulation of fliC in DC, similar to the one observed with ttm4, but this was associated with an up-regulation of fliC and stx1 in AC or TC. Finally, ttm3 showed slight upregulation of ler, fliC and qseA in AC. These results show that ttm4 and ttm2 might have a positive effect against virulence expression of E. coli O157:H7. However, this trend has to be validated with the further replicates on the SHIME® system. [less ▲]

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See detailAcute renal failure: definition and detection
DELANAYE, Pierre ULg

Conference (2017, June 13)

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See detailGFR and drug dosage adaptation: are we still in the mist?
DELANAYE, Pierre ULg

Conference (2017, June 13)

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See detailLa révolution du roman-feuilleton
Durand, Pascal ULg

Conference (2017, June 13)

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See detailLegal rare books @ the Graulich Library, University of Liège
Desseilles, François ULg

Conference (2017, June 12)

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See detailRemittances: a Loan Funds for Rural Economy? Illustration from the Kayes Area (Western Mali)
Yao Namé, Juste Michel ULg; Lebailly, Philippe ULg

Conference (2017, June 12)

In addition to have a direct and positive impact on reducing of food insecurity and poverty gaps in more vulnerable countries to shocks on the rainfall, the remittances received by the migrants families ... [more ▼]

In addition to have a direct and positive impact on reducing of food insecurity and poverty gaps in more vulnerable countries to shocks on the rainfall, the remittances received by the migrants families also allow them to have saving. This is what reveals the self-managed village banks of Kayes’ region, the most important emigration basin of Mali and located in strong climate variations area. However, this saving contributes less at agricultural sector finance. [less ▲]

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See detailTowards Mixed-Type Modelling of Structures with Slender and Deep Beam Elements
Liu, Jian ULg; Mihaylov, Boyan ULg

Conference (2017, June 12)

Concrete frame structures often include both slender and deep beams. Deep beams possess a large shear capacity, and thus are typically used as transfer girders to carry heavy loads over large spans. The ... [more ▼]

Concrete frame structures often include both slender and deep beams. Deep beams possess a large shear capacity, and thus are typically used as transfer girders to carry heavy loads over large spans. The overloading of such members due to extreme events such as earthquakes may result in the collapse of the entire structure. To evaluate the resilience of large frame structures under extreme loading, it is necessary to model the interaction between the deep girders and the rest of the structure in an accurate and computationally effective manner. To address this issue, this paper proposes a mixed-type modelling framework by formulating an innovative 1D macro deep-beam element and coupling it with 1D slender elements. The new macro element aims to combine the accuracy of 2D micro finite elements with the simplicity of 1D macro elements. The paper summarizes the formulations of this element, based on the three-parameter kinematic theory, and integrates it into an existing global nonlinear analysis procedure to create a mixed-type modeling framework. The verification study, including a frame structure with a deep transfer girder, has shown that this approach captures the response of the frame with an accuracy similar to that of 2D micro finite elements, while requiring approx. 20% of the analysis time. [less ▲]

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See detailDe Rome à la Grèce et retour : langue, pouvoir et identité sous l'Empire romain
Rochette, Bruno ULg

Conference (2017, June 10)

Une des conséquences majeures de la conquête romaine fut la diffusion du latin et de la culture romaine dans les pays soumis. Plusieurs textes de l’époque impériale pourraient faire croire que le latin ... [more ▼]

Une des conséquences majeures de la conquête romaine fut la diffusion du latin et de la culture romaine dans les pays soumis. Plusieurs textes de l’époque impériale pourraient faire croire que le latin est devenu une langue universelle utilisée à travers tout l’Empire romain : Pline l’Ancien, Plutarque, Pline le Jeune, Martial, saint Augustin. Qu’en est-il en réalité ? Rome n’a pas développé de politique linguistique. Son attitude à l’égard des problèmes sociolinguistiques fut souple et adaptée aux exigences réelles de chaque situation. Sous la République, on constate en effet une grande souplesse dans l’utilisation des langues par les magistrats romains lorsqu’ils sont en contact avec la Grèce. Même si le bilinguisme est fréquent chez les Romains de la République, dans la sphère publique, le latin conserve un rôle de langue de prestige, langue de la domination de Rome. Malgré cette souplesse, une concurrence naturelle s’est instaurée entre la langue des dominants et celle des dominés. En Occident, le latin devint l’unique langue de communication, orale comme écrite, tandis qu’en Orient, on assiste à une situation paradoxale : l’hellénisation des Romains, due au statut culturellement élevé du grec. Cette situation dichotomique n’implique toutefois pas un fractionnement en deux camps imperméables aux influences linguistiques et culturelles réciproques : ni l’Orient ni l’Occident ne sont deux domaines complètement fermés. [less ▲]

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See detailBone Markers and Vascular Calcification in CKD-MBD
DELANAYE, Pierre ULg

Conference (2017, June 10)

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See detailLa place de l’éthique dans la clinique du lien social
Englebert, Jérôme ULg; Gesché, Michèle; Kalonji, Johan

Conference (2017, June 09)

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See detailLa caricature par la manière : la technique des images selon les Goncourt
Stienon, Valérie ULg

Conference (2017, June 09)

Retraçant le parcours de Gavarni, évoquant leur amitié avec Rops, commentant les gravures destinées à illustrer leurs propres ouvrages, les Goncourt ne tiennent pas seulement un discours sur l’esthétique ... [more ▼]

Retraçant le parcours de Gavarni, évoquant leur amitié avec Rops, commentant les gravures destinées à illustrer leurs propres ouvrages, les Goncourt ne tiennent pas seulement un discours sur l’esthétique de l’image, ils disent aussi la médiation technique qui est à son origine. Gravure, lithographie, eau-forte ont leur place dans ce discours certes discret, mais précis et récurrent, qui conduit à s’interroger sur un savoir technique de la caricature propre aux Goncourt. La communication vise d’abord à mettre en évidence la nature et la portée de leurs propos sur les étapes matérielles intervenant dans la fabrique des images caricaturales, que ce savoir émane des sociabilités artistiques et culturelles (société des aquafortistes à laquelle est lié Rops, notamment) ou d’une expérience de participation à la presse. Il s’agit ensuite de déceler, dans l’essai, la fiction romanesque et le journal, les prises de positions manifestées à travers les valeurs, les avantages et les critiques que les Goncourt attribuent à ces techniques, à une époque où la caricature oscille entre les possibles de la gravure sur bois et les visées industrielles de la lithographie. [less ▲]

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See detailDiametral dimension and property Omega Bar far spaces Snu
Demeulenaere, Loïc ULg

Conference (2017, June 08)

Spaces Snu are metrizable sequence spaces defined by Jaffard in the context of multifractal analysis and signal treatment. From a functional analysis point of view, the study of these spaces points out ... [more ▼]

Spaces Snu are metrizable sequence spaces defined by Jaffard in the context of multifractal analysis and signal treatment. From a functional analysis point of view, the study of these spaces points out some topological properties, such as the facts they are locally pseudoconvex in general and locally p-convex in certain cases, Schwartz, and non-nuclear. In this talk, we focus on two topological invariants, namely the diametral dimension (Bessaga, Mityagin, Pelczynski, Rolewicz) and the property "Omega Bar" (Vogt, Wagner). Firstly, we revisit a result of Aubry and Bastin giving the diametral dimension of locally p-convex spaces Snu and extend it to some non-locally p-convex spaces Snu. Secondly, we explain how these developments can be used to prove that a subclass of spaces Snu (among which the locally p-convex ones) verifes the condition Omega Bar. [less ▲]

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See detailStochastic multiscale method applied to thermo-elasticity of polycrystalline micro-structures
Wu, Ling ULg; Lucas, Vincent; Golinval, Jean-Claude ULg et al

Conference (2017, June 05)

A stochastic 3-scale approach is developed in order to predict the probabilistic behavior of micro-resonators made of polycrystalline materials. In this method, stochastic volume elements (SVEs) [1] are ... [more ▼]

A stochastic 3-scale approach is developed in order to predict the probabilistic behavior of micro-resonators made of polycrystalline materials. In this method, stochastic volume elements (SVEs) [1] are defined from Voronoï tessellations using experimental measurements of the grain size, orientation, and surface roughness [2]. For each SVE realization, the mesoscopic apparent thermo-elastic properties such as elasticity tensor, thermal conductivity tensor, and thermal dilatation tensor are extracted using a coupled homogenization theory [3, 4]. A stochastic model is then built from the homogenized properties extracted from Voronoï tessellations using a moving window technique in order to generate spatially correlated meso-scale random fields. These random fields are then used as input for stochastic finite element simulations. As a result, the probabilistic distribution of micro-resonator properties can be extracted. The applications are two-fold: either a stochastic thermo-elastic homogenization is coupled to thermo-elastic 3D models of the micro-resonator in order to extract the probabilistic distribution of the Quality factor of the micro-resonators [5], or a stochastic second-order mechanical homogenization is coupled to a plate model of the micro-resonator in order to extract the effect of the uncertainties related to the surface roughness of the polycrystalline structures [1]. References [1] Lucas, V., Golinval, J.-C., Voicu, R., Danila, M., Gravila, R., Muller, R., Dinescu, A., Noels, L., & Wu, L. (in press). Propagation of material and surface profile uncertainties on MEMS micro-resonators using a stochastic second-order computational multi-scale approach. International Journal for Numerical Methods in Engineering. [2] Ostoja-Starzewski, M., Wang, X. (1999) Stochastic finite elements as a bridge between random material microstructure and global response, Computer Methods in Applied Mechanics and Engineering, 168, 35-49, 1999 [3] Temizer, I., Wriggers, P. (2011) Homogenization in finite thermoelasticity, Journal of the Mechanics and Physics of Solids 59 (2), 344-372 [4] Nguyen, V. D., Wu, L., Noels, L. (in press). Unified treatment of boundary conditions and efficient algorithms for estimating tangent operators of the homogenized behavior in the computational homogenization method. Computational Mechanics. [5] Wu, L., Lucas, V., Nguyen, V. D., Golinval, J.-C., Paquay, S., & Noels, L. (2016) A Stochastic Multi-Scale Approach for the Modeling of Thermo-Elastic Damping in Micro-Resonators. Computer Methods in Applied Mechanics & Engineering, 310, 802-839. [less ▲]

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See detailIncremental-secant mean-field-homogenization method for elasto-visco-plastic materials systems
Wu, Ling ULg; Bidaine, Benoît; Adam, Laurent et al

Conference (2017, June 05)

With the increasing use of engineered and/or heterogeneous materials, there is a need to develop multi-scale methods in order to predict with accuracy structural behaviors. One computationally efficient ... [more ▼]

With the increasing use of engineered and/or heterogeneous materials, there is a need to develop multi-scale methods in order to predict with accuracy structural behaviors. One computationally efficient multi-scale method is the mean-field homogenization (MFH) one, which considers as homogenized strain and stress fields the volume average of their respective counterparts in the different composite material phases. Although originally developed for elastic materials, MFH methods have been extended to non-linear behaviors by considering a linear comparison composite (LCC). To define this LCC, the authors have developed an incremental-secant mean-field homogenization formulation, for which the residual stress and strain states reached in the phases upon a fictitious elastic unloading are considered as starting point to apply the secant method [1, 2]. The mean stress fields in the phases are then computed using isotropic secant tensors, which are naturally used to define the LCC. The incremental-secant formulation has several advantages: it can handle non-radial loading conditions, it avoids the isotropisation step required by other incremental methods, and it can handle softening behaviors in an accurate way. In this work, we present an extension of the incremental-secant mean-field homogenization to elasto-visco-plastic composite materials. The formulation can account for both first and second statistical moment estimates during the evaluation of the visco-plastic flow. The method predictions are compared to finite element (FE), to Fast-Fourier-Transform (FFT), and to experimental results, to demonstrate the accuracy of the method. References [1] Wu, L., Noels, L., Adam, L., & Doghri, I. (2013). A combined incremental-secant mean-field homogenization scheme with per-phase residual strains for elasto-plastic composites. International Journal of Plasticity, 51, 80-102 [2] Wu, L., Noels, L., Adam, L., & Doghri, I. (2013). An implicit-gradient-enhanced incremental-secant mean- field homogenization scheme for elasto-plastic composites with damage. International Journal of Solids and Structures, 50(24), 3843–3860 [less ▲]

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See detailTransitive structures with generic/indefinite O-arguments in English: An emergent antipassive construction?
Lambert, Céline ULg; Plumat, Coraline ULg; Van linden, An ULg

Conference (2017, June 03)

This corpus study focuses on transitive structures that contain generic/indefinite O-arguments in Present-day English, cf. (1) featuring things and (2) featuring folks, and investigates to what extent ... [more ▼]

This corpus study focuses on transitive structures that contain generic/indefinite O-arguments in Present-day English, cf. (1) featuring things and (2) featuring folks, and investigates to what extent these show reduced transitivity and backgrounded discourse status in the sense of Hopper and Thompson (1980). As can be observed in (1) and (2), the constructions studied show a high degree of transitivity on most of the transitivity parameters proposed in Hopper and Thompson (1980), apart from the individuation of the O-argument. For example, (1) and (2), score high in terms of kinesis, volitionality, agency and affirmation, but their O-arguments have generic reference. In addition, the constructions examined generally form part of backgrounded discourse. In (1) and (2), rather than pushing the story-line further, the structures render descriptions of a person’s character and behaviour that make them eligible for a specific task or job. (1) Iyad Allawi is strong and tough with a hard edge. He’ll make things better. (USnews) (2) The fact that he cut such a handsome figure tended to make folks forget that he didn’t know it all. He looked and acted like a man destined for great things, and most people tend to be swayed by a man’s opinion of himself. (USbooks) More generally, the data suggest that in the constructions studied, the noun phrases coding O-participants merely function as filler elements, used to satisfy the argument-structure requirements imposed by the verb. In view of them realizing non-individuated O-arguments in backgrounded stretches of discourse, we propose that the structures focused on could be analysed as emergent (Hopper 1991) antipassive constructions, which won’t necessarily develop into canonical antipassive constructions over time. In fact, there is a good chance that they will never shed overt expression of the (original) O-argument. In addition to things and folks, this study examines the nouns people, stuff and shit(s) in the role of O-participant, thus factoring in an animacy variable (animate people, folks versus inanimate things, stuff and shit(s)), as well as a register variable (neutral people, things versus informal to slang folks, stuff, and shit(s)). Specifically, the queries used allowed for up to two intervening words between any verb form and the noun studied; for each noun 250 relevant examples were analysed, drawn from random samples from the US subcorpora of WordBanksOnline. References Hopper, P. 1991. On some principles of grammaticization. In Traugott & Heine (eds), Approaches to Grammaticalization, vol. 1: Focus on Theoretical and Methodological Issues, 17-35. Amsterdam: John Benjamins. Hopper, P. & S.A. Thompson. 1980. Transitivity in grammar and discourse. Language 56 (2): 251-299. [less ▲]

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See detailSexting ; pratiques adolescentaires à risque de violences ?
Glowacz, Fabienne ULg

Conference (2017, June 02)

La violence cybernétique dans les couples d’adolescents est une forme de violence recourant aux nouvelles technologies pouvant comprendre deux versants, l’un d’agression (impliquant par exemple des ... [more ▼]

La violence cybernétique dans les couples d’adolescents est une forme de violence recourant aux nouvelles technologies pouvant comprendre deux versants, l’un d’agression (impliquant par exemple des insultes, humiliations et menaces en ligne vis-à-vis du partenaire) et l’autre de contrôle (impliquant la surveillance en ligne des activités en ligne et hors-ligne du partenaire). Dans le cadre de cette communication, c’est la pratique de sexting, les dynamiques relationnelles et les risques s’y rapportant qui seront abordés à partir d’une part des données d’une enquête menée auprès d’une population d’adolescents et d’autre part, de présentations de vignettes cliniques. La pratique de sexting lors de l’adolescence et le début de l’âge adulte jouerait un rôle dans l’expression de la sexualité et le recours aux textos et sextos serait relativement répandu tant chez les garçons que chez les filles. Il peut dès lors s’inscrire en tant que modalités d’interactions relationnelles et sexuelles négociées passant par la voie de l’image mettant en lumière l’ambiguité de « la proximité et de l’intimité à distance ». Il a cependant été montré que le sexting peut être associé à des pratiques sexuelles et des conduites à risques et de harcèlement sexuel. Au terme de la présentation, nous envisagerons comment construire la prévention et les interventions par rapport à ces nouvelles formes de dynamiques relationnelles et de violences sexuelles. [less ▲]

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See detailWhat do Comics do to Graphic Novels? Remediating Old Comics
Crucifix, Benoît ULg

Conference (2017, June 02)

A widely debated object, the graphic novel has catalyzed anxieties about changes within the comics world, postulating something of a radical break with its past. Albeit with great nuance, Jan Baetens and ... [more ▼]

A widely debated object, the graphic novel has catalyzed anxieties about changes within the comics world, postulating something of a radical break with its past. Albeit with great nuance, Jan Baetens and Hugo Frey put forward the bold argument that graphic novels constitute not only a “special type of comics” or a genre, but perhaps even a new medium. At the same time, they also repeatedly hint at how graphic novels are traversed by references to the past of comics, at times lapsing into a constraining retromania. This talk seeks out to dig into these questions by focusing on the remediation of the comic strip within two recent American graphic novels: Daniel Clowes’s "Ice Haven" and Cole Closser’s "Little Tommy Lost". Both works recuperate the medial body of the comic strip within their structure, demonstrating a self-reflexive historical awareness that redraws ‘old’ comics into its cultural make-up. Considering the remediation of the comic strip within the graphic novel, this talk analyzes how remediation might work ‘within’ a medium, reinvigorating the concept in a historical but medium-specific perspective that accounts for the dynamically changing identities of a medium. [less ▲]

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See detailThéories implicites de personnalité et mécanismes de désengagement moral : Analyse différentielle des cognitions d’auteurs présumés selon la culpabilité auto-révélée et la qualification judiciaire des faits d’infractions sexuelles sur mineurs
Garcet, Serge ULg

Conference (2017, June 02)

Les unités cognitivo-affectives qui sous-tendent l’adaptation à l’environnement, et particulièrement les mécanismes d’évaluation, de réflexion et de régulation des comportements et de leurs conséquences ... [more ▼]

Les unités cognitivo-affectives qui sous-tendent l’adaptation à l’environnement, et particulièrement les mécanismes d’évaluation, de réflexion et de régulation des comportements et de leurs conséquences, sont des variables à prendre en compte lorsque l’on aborde le passage à l’acte et la réitération des comportements d’agression sexuelle. Une meilleure compréhension de ces processus et de leurs contenus (catégorisations, théories implicites de personnalité, scripts, schémas) affine l’approche des comportements d’agression sexuelle. Elle améliore également l’intervention judiciaire, par une meilleure prise en compte des risques potentiels, et l’action thérapeutique par l’identification de leviers susceptibles d’initier le changement. Parmi ces mécanismes autorégulateurs, les processus de justification et de reconstruction cognitive qui inhibent les comportements perçus comme immoraux (Sykes et Matza ; Bandura & al. ; Barriga et Gibbs ), et regroupés sous le label de « mécanismes de neutralisation morale » sont particulièrement intéressants puisqu’ils ont pour fonction d’atténuer la dissonance cognitive chez l’auteur et rendre acceptable voire légitimer les comportements d’agressions sexuelles. Ces mécanismes de désengagement peuvent être identifiés au travers des théories implicites de personnalité (TIP) observables dans les discours des auteurs à l’égard de leurs victimes. La présente étude a consisté à analyser un ensemble de 470 corpus de justifications recueillis lors des premières auditions policières de 60 auteurs présumés d’infractions à caractère sexuel sur mineurs, en aveu ou non, afin d’identifier les différentes représentations (TIP) auxquelles ils ont eu recours dans le but d’envisager comment ces représentations implicites alimentent par leurs contenus les processus cognitifs de désengagement moral. La qualification présumée des faits et le moment judiciaire (information ou instruction) durant lequel se déroule l’audition ont aussi été pris en compte afin de mesurer l’éventuelle incidence de ces variables sur les modes préférentiels de justification et de neutralisation. Chacune des auditions a été analysée au moyen d’une grille d’interprétation construite sur la base des théories implicites de la personnalité consacrées aux agresseurs sexuels de Ward & Keenan (1999). 470 corpus ont été identifiés et regroupés selon les différentes théories implicites de personnalité du modèle de Ward & Keenan. Les différents corpus ont également été croisés avec les échelles des cognitions d’Abel & al. (1989) et les formes du déni (Facets of Sexual Offender Denial - FoSOD) de Schneider et Wright (2001). Dans un second temps, les différents contenus implicites associés aux corpus ont été mis en perspective avec les mécanismes de neutralisation morale mais aussi avec la nature des faits reprochés, le moment judiciaire et la présence d’aveu ou non afin de dégager d’éventuels modes préférentiels de désengagement. Les résultats obtenus mettent en évidence l’existence de différents processus de justification qui sont autant d’illustration des processus de désengagement moral des auteurs d’infraction à caractère sexuel que ce soit dans une perspective d’atténuation de la culpabilité face au système judiciaire ou de réduction de la dissonance cognitive. Il existe également des profils différentiels de théories implicites de personnalité et de processus de neutralisation morale entre les sujets selon qu’ils soient en aveux ou non et selon la qualification des faits incriminés. Le moment de la procédure durant lequel le sujet a été auditionné n’a par contre pas d’impact. L’étude contribue ainsi au développement d’outils psychométriques susceptibles de rendre compte de la façon dont les auteurs d’infractions sexuelles se représentent et justifient leurs comportements à l’égard des victimes mais elle ouvre également des perspectives par rapport à l’analyse que nous pouvons faire du discours de l’auteur, de son éventuelle crédibilité par la prise en compte des mécanismes préférentiels de désengagement de sa responsabilité. [less ▲]

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See detailCellwise robust regularized discriminant analysis
Aerts, Stéphanie ULg; Wilms, Ines

Conference (2017, June 02)

Quadratic and Linear Discriminant Analysis (QDA/LDA) are the most often applied classification rules under normality. In QDA, a separate covariance matrix is estimated for each group. If there are more ... [more ▼]

Quadratic and Linear Discriminant Analysis (QDA/LDA) are the most often applied classification rules under normality. In QDA, a separate covariance matrix is estimated for each group. If there are more variables than observations in the groups, the usual estimates are singular and cannot be used anymore. Assuming homoscedasticity, as in LDA, reduces the number of parameters to estimate. This rather strong assumption is however rarely verified in practice. Regularized discriminant techniques that are computable in high-dimension and cover the path between the two extremes QDA and LDA have been proposed in the literature. However, these procedures rely on sample covariance matrices. As such, they become inappropriate in presence of cellwise outliers, a type of outliers that is very likely to occur in high-dimensional datasets. We propose cellwise robust counterparts of these regularized discriminant techniques by inserting cellwise robust covariancematrices. Ourmethodologyresultsinafamilyofdiscriminantmethods that are robust against outlying cells, cover the gap between LDA and QDA and are computable in high-dimension. [less ▲]

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See detailPRP & arthrose
Kaux, Jean-François ULg

Conference (2017, June 02)

Les injections de Plasma Riche en Plaquettes (PRP) dans le traitement de diverses pathologies arthrosiques semblent se développer comme un nouveau traitement de pointe. Sur base de ce constat, nous avons ... [more ▼]

Les injections de Plasma Riche en Plaquettes (PRP) dans le traitement de diverses pathologies arthrosiques semblent se développer comme un nouveau traitement de pointe. Sur base de ce constat, nous avons relevé dans la littérature, les conditions de protocoles d’optimisation du traitement du PRP dans les lésions cartilagineuses. [less ▲]

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See detailThe diachrony of polysemy networks. Cognitive and cultural motivations for the semantic extension of time-related lexemes in Ancient Greek and Ancient Egyptian – Coptic
Georgakopoulos, Athanasios ULg; Polis, Stéphane ULg

Conference (2017, June 02)

This paper aims at contrasting the semantic extension of time-related lexemes in Ancient Greek and Ancient Egyptian – Coptic in order to identify shared cognitive motivations and to assess the potential ... [more ▼]

This paper aims at contrasting the semantic extension of time-related lexemes in Ancient Greek and Ancient Egyptian – Coptic in order to identify shared cognitive motivations and to assess the potential impact of cultural factors on the evolution of this lexical field in both languages. In doing so we first take as a point of departure semantic networks inferred from synchronic polysemy data in large language samples, such as Youn et al. (2016) and CLICS (List et al., 2014). In a second step, we identify the lexemes that lexicalize meanings associated with DAY/DAYTIME/TIME in Ancient Greek (8th – 1st c. BC) and Ancient Egyptian (26th c. BC – 10th c. AD), two languages with significant diachronic material. The data are extracted from dictionaries, grammars, and from the Perseus digital library (http://www.perseus.tufts.edu/hopper/) for Ancient Greek, and from the Thesaurus Linguae Aegyptiae (http://aaew.bbaw.de/tla/), the Ramses corpus (http://ramses.ulg.ac.be), and Coptic etymological dictionaries for Ancient Egyptian. Based on this diachronic material we describe the semantic extensions of time-related lexemes and map them onto the synchronic polysemy networks. In a final step, our results are checked against The Catalogue of Semantic Shifts in the Languages of the World (http://semshifts.iling-ran.ru/). Fig. 1 exemplifies how meaning extension may be added to polysemy networks. A diachronic analysis reveals that, for the Ancient Greek lexical unit hṓra, the meaning ‘time’ is historically prior to the meaning ‘hour.’ Accordingly, we may add a directed arrow representing the directionality of change from ‘time’ to ‘hour.’ Similarly, Ancient Egyptian data points to an extension of the polysemy network of the lexical unit tr – originally meaning ‘time,’ ‘moment in time’ – to ‘season’ (cf. Coptic ⲧⲏ tê ‘time, season’). One can then describe the cognitive motivations (e.g., metaphor, metonymy, etc.) for meaning extensions and analyze the cultural factors underlying the observed evolutions. In the case of the Greek word hṓra, for instance, a metonymic motivation between TIME and HOUR could be established. Finally, the analysis can be refined by searching in the corpus bridging contexts that allow such extensions of the polysemy networks of content items. The approach adopted here is closely connected to the semantic map method, which has recently shifted its focus from the study of the polysemic patterns of grammatical morphemes (in this respect, see, e.g., Haspelmath, 2003) to the study of lexical items (e.g., François, 2008, Perrin, 2010, Wälchli and Cysouw 2012, and Georgakopoulos et al., 2016). As such, our paper has also a methodological bearing on the semantic map model, both because of its focus on content words and on diachrony (see van der Auwera, 2008; Narrog, 2010; Luraghi, 2014; Juvonen and Koptjevskaja-Tamm, 2016). All things considered, this diachronic take on the polysemic networks of lexemes belonging to a particular semantic domain offers a new perspective on dealing with the question of the directionality of meaning change. [less ▲]

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See detailIntérêt de la cryothérapie chez le sportif
Kaux, Jean-François ULg

Conference (2017, June 02)

La thérapie par le froid est couramment utilisée comme une procédure pour soulager les symptômes douloureux, particulièrement dans les maladies inflammatoires. La cryothérapie corps entier consiste en une ... [more ▼]

La thérapie par le froid est couramment utilisée comme une procédure pour soulager les symptômes douloureux, particulièrement dans les maladies inflammatoires. La cryothérapie corps entier consiste en une exposition à l’air très froid (maintenue entre -110 °C et -140 °C) en cryochambre spéciale, généralement pendant 2 minutes. En médecine sportive, la cryothérapie corps entier a gagné en popularité comme méthode améliorant la récupération ou accélérant la guérison des blessures. Malheureusement, il n’y a peu de documents relatifs à l’application de ce traitement chez les athlètes. [less ▲]

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See detailAccessibilité/disposition au traitement et processus de désistance : articulation des principes théoriques du Good Lives Model à la réalité clinique
Devillers, Bérengère ULg; Henrard, Noémie ULg; Corneille, Serge ULg

Conference (2017, June 02)

Le Good Lives Model (GLM) s’attèle au développement et à l’amélioration du bien-être et d’une identité personnelle positive en tenant compte des caractéristiques de l’environne- ment. Il s’agit notamment ... [more ▼]

Le Good Lives Model (GLM) s’attèle au développement et à l’amélioration du bien-être et d’une identité personnelle positive en tenant compte des caractéristiques de l’environne- ment. Il s’agit notamment de guider l'individu dans l’élaboration d’un plan de vie en prenant en compte ses besoins humains fondamentaux ainsi que les ressources et compétences nécessaires pour y arriver. Le G.L.M. va donc inciter l’acquisition de ressources et la réduc- tion de la récidive, en tant que celle-ci constitue un obstacle au bien-être et à l’accomplisse- ment personnel. Plus spécifiquement, le G.L.M. est efficace pour surmonter certaines limites inhé- rentes aux approches traditionnelles grâce, notamment, au soutien du processus de désis- tance, fruit d’interactions complexes entre des facteurs subjectifs, environnementaux et sociaux, et à l’amélioration de la disposition/accessibilité au traitement qui renvoie à la présence de caractéristiques (états et dispositions) dans le chef de l’usager, mais aussi de la situation thérapeutique. Il est donc de la responsabilité des intervenants d’adapter leurs traitements aux besoins des usagers plutôt que d’exiger des usagers qu’ils adaptent leurs besoins aux compétences limitées des intervenants. Lors de cette communication, nous souhaitons, d’une part, articuler ces différents repères théoriques à un suivi thérapeutique, d’un auteur d’infractions à caractère sexuel, réalisé en milieu pénitentiaire et, d’autre part, interroger et souligner les effets potentiels de la posture professionnelle sur les facteurs subjectifs impliqués dans la désistance. [less ▲]

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See detailViolences sexuelles dans les relations amoureuses des adolescents : quelles perspectives de prévention et d’intervention ?
Courtain, Audrey ULg; Glowacz, Fabienne ULg

Conference (2017, June 02)

La présente communication a pour objectif de faire un état des lieux des violences sexuelles (VS) que les adolescents et jeunes adultes peuvent agir ou subir dans leurs relations amoureuses, de mettre ... [more ▼]

La présente communication a pour objectif de faire un état des lieux des violences sexuelles (VS) que les adolescents et jeunes adultes peuvent agir ou subir dans leurs relations amoureuses, de mettre cette VS en perspective avec les attitudes que les jeunes ont vis-à-vis de celle-ci, et de questionner les manifestations traumatiques. Un questionnaire a été administré en passation groupale à des étudiants (N>1000, 15-25 ans) en Belgique francophone reprenant trois outils : le CADRI (Conflict in Adolescent Dating Relationships Inventory ; Wolfe et al., 2001), l’ATDVS (Attitudes Toward Dating Violence Scale ; Price & Byers, 1999) et l’échelle d’Horowitz sur l’impact des événements traumatisants (Horowitz et al, 1979 ; Brunet et al., 2003). Après un descriptif des prévalences de VS agies et subies, ainsi que des attitudes des participants, et des manifestations traumatiques, nous traiterons des liens entre les VS et les attitudes afférentes, en termes de perpétration et de victimisation. Aussi, nous questionnons les liens entre les attitudes relatives aux VS et les manifestations traumatiques. Tout au long de nos analyses, les différences de genre seront considérées. Les résultats permettront d’envisager de nouvelles perspectives préventives et cliniques ajoutant à l’approche des violences psychologiques et physiques celle des violences sexuelles dans les relations amoureuses des adolescentes analysées sous le prisme des attitudes et du trauma [less ▲]

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See detailSuperconducting weak links created by electromigration
Silhanek, Alejandro ULg

Conference (2017, June 01)

In this presentation, we explore in-situ controlled electromigration to fabricate superconducting weak links. We show evidence that in Al a transition from thermally assisted phase slips (TAPS) to quantum ... [more ▼]

In this presentation, we explore in-situ controlled electromigration to fabricate superconducting weak links. We show evidence that in Al a transition from thermally assisted phase slips (TAPS) to quantum phase slips may takes place when the effective cross section becomes smaller than ~150 nm^2. In the regime dominated by quantum phase slips the nanowire loses completely its capacity to carry current without dissipation, even at the lowest possible temperature. We also discuss the origin of negative magnetoresistance at low magnetic fields in the bow-tie shaped constrictions. Strikingly, the detrimental effect caused by the repeated electromigration can be healed by simply inverting the current direction. These findings reveal perspectives of the proposed fabrication method for exploring various fascinating superconducting phenomena in atomic size constrictions. [less ▲]

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See detailLa reconnaissance de la maladie mentale en psychopathologie légale
Englebert, Jérôme ULg

Conference (2017, June 01)

De nombreux programmes thérapeutiques recommandent d’orienter la thérapie sur la reconnaissance du trouble ou de la maladie. Nous évoquerons cette problématique dans le cadre de la psychiatrie légale ... [more ▼]

De nombreux programmes thérapeutiques recommandent d’orienter la thérapie sur la reconnaissance du trouble ou de la maladie. Nous évoquerons cette problématique dans le cadre de la psychiatrie légale (particulièrement avec des patients présentant un diagnostic de schizophrénie et ayant commis des faits de délinquance sexuelle). Avoir pour objectif de réduire l’anosognosie pose la question des représentations du trouble et de la connaissance de ces phénomènes complexes. La distinction des perspectives en première et troisième personnes est un apport récent et décisif de la phénoménologie à la psychologie clinique et à la psychopathologie (Parnas, Sass & Zahavi, 2012). La perspective en troisième personne consiste en l’attribution, depuis une position externe, de signes cliniques repérés indépendamment du ressenti exprimé par le patient. L’exemple typique de ces signes est le délire et l’hallucination du schizophrène. Ces symptômes cristallisent précisément les difficultés qu’éprouve le sujet à se reconnaitre affecté du trouble. La perspective en première personne concentre, quant à elle, son attention sur l’expérience subjective exprimée par le patient. Si l’on reprend le cas de la schizophrénie, ce sont la « perte de l’évidence naturelle » des choses ou un « sentiment de diminution du soi » qui sont verbalisés. Ce pas de côté de la vision omnisciente du médical, assumant une remise en cause du pouvoir de domination qu’entraine la perspective en troisième personne, se révèle être un outil psychothérapeutique pertinent. Il désacralise le problème de l’anosognosie et ouvre la voie à une perspective intersubjective, à une « co-reconnaissance ». [less ▲]

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See detailQuand l'enfant révèle un abus sexuel : le vécu du couple, ses fonctions et conséquences
Gallo, Alicia ULg; Wertz, Céline ULg; Blavier, Adelaïde ULg

Conference (2017, June 01)

Cet exposé relate les difficultés du couple à l’annonce d’un abus sexuel d’un enfant. Ce vécu mérite d’être investigué car nous savons combien la souffrance des parents influence celle des enfants et peut ... [more ▼]

Cet exposé relate les difficultés du couple à l’annonce d’un abus sexuel d’un enfant. Ce vécu mérite d’être investigué car nous savons combien la souffrance des parents influence celle des enfants et peut alimenter voire maintenir leurs symptômes. Notre échantillon comprend 6 couples dont l’enfant a été victime. Nous avons réalisé un entretien semi-structuré récoltant les informations sur les circonstances de l’abus. De plus, nous avons administré 5 questionnaires évaluant une dimension spécifique du couple. Les résultats obtenus soulignent une détresse chez chaque couple. Cependant, celle-ci s’exprime différemment, aussi bien entre les couples qu’entre les partenaires conjugaux. Néanmoins, pour chacun d’eux, la dimension de la parentalité semble être une ressource permettant un investissement auprès de leur enfant par une focalisation ayant pour conséquence l’effacement du couple conjugal. Si certains couples manifestent néanmoins un rapprochement, celui-ci se fait autour de l’enfant et du problème. Cette capacité à faire équipe nous laisse penser que ces couples disposent de ressources pour faire face à l’abus. L’intérêt porté à la détresse conjugale et parentale semble primordial car si les parents tentent dans un premier temps de mettre en place des mécanismes assurant l’homéostasie et la sécurité, ceux-ci ne sont pas toujours adaptatifs à long terme (secret de famille, surprotection, étiolement du couple). Ainsi, il nous semble impératif de soutenir et contenir la conjugalité. D’autres études sont nécessaires pour approfondir les difficultés vécues par ces couples. [less ▲]

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See detailA novel approach towards manipulation of vortex matter in a superconductor with micromagnetic structures
Shaw, Gorky ULg

Conference (2017, June 01)

Though Superconductor/Ferromagnet hybrids is a widely studied system, application of hard magnetic materials as sources of vortex pinning remains relatively unexplored. They offer a number of advantages ... [more ▼]

Though Superconductor/Ferromagnet hybrids is a widely studied system, application of hard magnetic materials as sources of vortex pinning remains relatively unexplored. They offer a number of advantages over softer magnetic materials, like greater stability and larger magnetic field amplitudes. Recently, a promising technique, thermomagnetic patterning (TMP), has been developed to prepare micromagnets, which serve as micro flux sources to produce magnetic fields spatially modulated at the micron scale. Permanent magnetic structures prepared using TMP present an interesting and so far unexplored option for controlled artificial pinning. We have investigated the vortex matter in superconductor/TMP micromagnet heterostructures (Nb-NdFeB) using quantitative Magneto-Optical Imaging (MOI). Comprehensive protocols have been developed for calibrating and converting Faraday rotation data acquired by MOI to magnetic field maps. These protocols reveal the comparatively weaker magnetic response of the superconductor from the background of larger fields associated with the magnetic layer in its vicinity. Further, TMP micromagnet structures have been imprinted in a permalloy (Py) layer following a protocol reported earlier to obtain flexible magnetic landscapes for flux guidance in a Nb layer below it. Both smooth flux penetration and vortex avalanches in Nb are observed to be strongly influenced by the micromagnetic patterns. Our study offers new insights into the peculiarities of the vortex state in these superconductor-micromagnet heterostructures. [less ▲]

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See detailShallow water model with anisotropic porosity for flood modelling on Cartesian grids
Bruwier, Martin ULg; Archambeau, Pierre ULg; Erpicum, Sébastien ULg et al

Conference (2017, June)

Detailed topographic data have become widely available for inundation mapping. While the use of such high-resolution data enables the computation of flow variables at a fine scale, the computation time ... [more ▼]

Detailed topographic data have become widely available for inundation mapping. While the use of such high-resolution data enables the computation of flow variables at a fine scale, the computation time remains too high for many practical applications. In contrast, models solving the shallow-water equations with porosity provide a useful tool to improve the computational efficiency, while preserving to some extent the detailed topographic information through porosity parameters. In this study, we present a new model solving the fully dynamic shallow water equations with anisotropic porosity based on Cartesian grids. Using a Cartesian grid leads to specific challenges, particularly as regards the definition of the conveyance porosities at the cell edges. Moreover, the presented model is further improved by a merging method so as to increase the computational efficiency without affecting the overall accuracy. The performance of the model has been evaluated based on a wide range of test cases, which confirm the validity of the model and the benefits of such a modelling framework. [less ▲]

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See detailGelfand duality for compact pospaces
De Rudder, Laurent ULg

Conference (2017, June)

It is well known that the category of compact Hausdorff spaces is dually equivalent to the category of commutative C^\star-algebras. More generally, this duality can be seen as a part of a square of ... [more ▼]

It is well known that the category of compact Hausdorff spaces is dually equivalent to the category of commutative C^\star-algebras. More generally, this duality can be seen as a part of a square of dualities between compact Hausdorff spaces, C^\star-algebras, compact regular frames and de Vries algebras. Three of these dualities have been extended to dualities between compact pospaces, stably compact frames and proximity frames, the fourth part of the square being lacking. We propose the category of bounded Archimedean l-semi-algebra to complete what will be the outside square of dualities and to extend to category of C^\star-algebras. [less ▲]

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See detailIntermodal transport: does a wider definition improve its competitiveness?
Mostert, Martine ULg; Limbourg, Sabine ULg; Caris, An

Conference (2017, June)

With the opening of borders and always greater decentralization of production, freight transport increased a lot in the last decades. Road remains the most used mode in Europe (Eurostat, 2016). Even if it ... [more ▼]

With the opening of borders and always greater decentralization of production, freight transport increased a lot in the last decades. Road remains the most used mode in Europe (Eurostat, 2016). Even if it is appreciated for its responsiveness, flexibility, and quickness, road transport is however responsible for negative impacts on its environment like air pollution or climate change. Intermodal freight transport i.e. the transportation of goods using two or more modes of transport, in the same loading unit, without handling of the goods themselves (United Nations, 2001) is identified by the European Commission (2011) as an interesting solution for limiting the negative impacts of transport. In the classical conception of intermodal transport, pre- and post-haulage travels are supposed to be short, and to be performed by road transport, whereas the long-haul travel is done using rail or IWW. The combination of these modes allows reducing the negative externalities of the whole travel, i.e. the negative impacts that are generated by transport operators, but which are not directly supported by them. These externalities in particular consist in air pollution and climate change, provoked by the release of emissions which lead to air pollution and human health problems. The objective of this study is to determine the impact on intermodal attractiveness of allowing other combinations of modes than the classical road-rail/IWW-road combination, during an intermodal travel. The research is based on tools of the operations research domain and proposes the development of an allocation model for freight transport at the strategic level of decision. The goal is to determine the flow distribution of goods between direct transportation by road, rail or inland waterways, and any combination of these modes using intermodal transport. The novelty consists in taking into account three modes of transport in a mixed integer programming model, and to allow the transfer from any mode to any other at intermodal terminals where these modes coexist. [less ▲]

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See detailCoulombic driven multi-conformational aspects of oligorotaxane switches studied by ion mobility mass spectrometry and molecular dynamics
Hanozin, Emeline ULg; Mignolet, Benoît ULg; Morsa, Denis ULg et al

Conference (2017, June)

Introduction Artificial Molecular Machines (AMMs), such as Mechanically Interlocked Molecules (MIMs) and foldamers, have recently raised tremendous interest due to their unique properties. Under the ... [more ▼]

Introduction Artificial Molecular Machines (AMMs), such as Mechanically Interlocked Molecules (MIMs) and foldamers, have recently raised tremendous interest due to their unique properties. Under the influence of an appropriate stimuli (pH, redox potential, light…), such molecules are able to reversibly switch between distinct conformational states. Scientists may capitalize on such exclusive properties to get a better understanding of the biomacromolecular level or to design innovative “smart” materials. At the interface between foldamers and MIMs, oligorotaxanes exhibit a spring-like folded secondary structure with remarkable mechanical and physicochemical properties. In the present study, we use ion mobility coupled with mass spectrometry (IM-MS) to probe the conformational states of differentially charged oligorotaxanes in the gas phase. Method Oligorotaxanes are donor-acceptor polymers composed of a π electron-donating dumbbell over which a discrete number of π electron-accepting tetracationic cyclophanes are threaded. The numerous intra-molecular interactions provide them a highly-stabilized rigid rod-like structure in solution. We use IM-MS as implemented in the Synapt G2 HDMS (Waters, Manchester, UK) to investigate the structure of the ionized oligorotaxanes. Our purposes are to probe (i) the different populations of stable conformers generated according to the charge state z and (ii) the reversibility of an electron-driven or thermal-driven conformational change in the gas phase implemented via an electron transfer or collisional activation process prior to the mobility separation. Our experimental observations are supported by electronic structure optimizations at the PM6 and DFT levels coupled with Born-Oppenheimer Molecular Dynamics simulations. Preliminary data Our results highlight a progressive elongation of the oligorotaxane structure with increasing charge numbers until it reaches a maximum extension state. Matching the experimental data with theoretical simulations, we find that the oligorotaxanes adopt an entropically-favored globular shape at low z. As z increases, coulombic repulsions occurring between the cyclophanes gradually outweigh the stabilizing π-stacking interactions and force the structure to elongate. This process occurs in a multistep fashion, each corresponding to a distinct group of helical-shaped conformers, before it eventually results in a fully stretched structure. On the other hand, our results also highlight that a charge reduction driven by a non-dissociative electron transfer process leads to a refolding of the structure so that it adopts a size similar to its electrospray-generated counterpart when the appropriate number of electrons is added. This observation may be imparted to the gradual decrease of the Coulomb repulsions between the cyclophanes mediated through increasing numbers of transferred electrons. These results suggests that the transition from one conformer to another is reversible so that the electrostatic balance between the cyclophanes may be used to further tune the structural state adopted by this artificial molecular switch. The second stimulus relied on collisional activation whose inelastic component provides a way to build up energy into the accessible vibrational degrees of freedom. The conformational landscapes of such-activated oligorotaxanes ions were found unchanged in term of collision cross section position but the repartition of population was altered with a promotion of the most elongated conformer, provided the absence of selective fragmentation. Altogether, these results highlight the feasibility of handling the elongation state of oligorotaxanes in the gas phase through appropriate inputs and underline its conformational reversibility properties. Novel aspect Stimuli-induced reversible conformational rearrangements of innovative AMMs studied by IM-MS and molecular dynamics in the gas phase. [less ▲]

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See detailThe Delivery of Bad News to Customers in Service Encounters: An Employee Perspective
Delcourt, Cécile ULg; Gremler, Dwayne; Greer, Dominique

Conference (2017, June)

During service encounters, customer contact employees often need to deliver bad news: unexpected information contrary to the customer’s wellbeing. For example, technicians regularly tell customers that ... [more ▼]

During service encounters, customer contact employees often need to deliver bad news: unexpected information contrary to the customer’s wellbeing. For example, technicians regularly tell customers that none of the data on their computer hard drive can be retrieved, veterinarians often inform owners that a beloved pet has cancer and cannot be cured, and airline staff regularly tell travelers that their flights have been cancelled due to bad weather. For some customer-contact employees, delivering bad news is an unavoidable, delicate, and emotionally-charged task that occurs regularly. Disclosing bad news can be highly stressful and perhaps detrimental for (1) customers, (2) customer- contact employees, and (3) service firms in general. Accordingly, it is crucial for service organizations to better understand bad news encounters (i.e., situations during which customer contact employees must deliver negative information) to better equip their managers and employees to deliver such news to customers. The topic of how to best deliver bad news has been broached in various disciplines, including the medical literature (e.g., Baile et al. 2000, 2002; Rosenbaum et al. 2004), the management literature (e.g., Bies 2013; Kothari, Shu, and Wysocki 2009), and the sociology literature (e.g., Clark and LaBeff 1986). These literatures have (1) examined the attitudes and emotions of the discloser of extreme bad news in very specific contexts, (2) identified the tactics used by disclosers, and (3) developed protocols for delivering extremely negative information. Surprisingly, studies of bad news delivered by contact employees are scarce in service research. Service failure and service recovery have received much attention, but this literature has two major gaps when it comes to understanding the delivery of negative information. First, service recovery research generally skips over the initial part of the process where employees first communicate bad news to customers, and instead focuses primarily on the process involved to resolve the situation. Second, there are many situations in which employees must deliver negative information to customers where it is clear that a service failure has not occurred (e.g., informing a customer that his 30-year old dishwasher is beyond repair). We use the critical incident technique (CIT) (Flanagan 1954; Gremler 2004) to analyze 200 incidents where service employees from a wide range of service sectors had to deliver bad news to a customer. [less ▲]

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See detailLong-term monitoring of European eels in the Belgian Meuse River basin. From the historical drastic decline to recent outcomes of restocking practices.
Nzau Matondo, Billy ULg; Dierckx, Arnaud ULg; Benitez, Jean-Philippe ULg et al

Conference (2017, June)

Long-term monitoring of yellow- and glass eel stages were performed in upland areas (>300km from sea) in order (i) to quantify the decline of wild yellow eels entering in the Belgian Meuse from the ... [more ▼]

Long-term monitoring of yellow- and glass eel stages were performed in upland areas (>300km from sea) in order (i) to quantify the decline of wild yellow eels entering in the Belgian Meuse from the Netherlands; (ii) to follow their upstream individual colonization; and (iii) to analyze the adaptation of young eels stocked as glass eels imported from UK. By monitoring a fish pass from 1992 to 2016, we quantified that the number of ascending eels has declined from n=5613 in 1992 to n=21 in 2016 (3.99%/year) and the mean length of eels has increased (4.1mm/year). During 6-years, upstream individual colonization of eels (2010-2015, n=1371) was followed using fixed RFIDtracking system. Few eels continued to migrate 4 years after tagging (<0.3%) and at >20km upstream (3.7%); and velocity of eels varied between individuals (0.012- 3.1km/day). In a 4-year (2013-2016) monitoring study of restocked glass eels using electrofishing and mobile RFID-tracking campaigns, we observed that eels grew rapidly in upland small brooks and recruitment was better in rivers with high carrying capacity (>15.8%, 2years post-stocking). Restocked eels dispersed in up- and downstream directions with behaviors including sedentary, nomadic and intermediate lifestyles. This suggests stocking as potential management measure to enhance local eel stocks. [less ▲]

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See detailNumerical simulations of a non-charring ablator in high enthalpy flows by means of a unified flow-material solver
Schrooyen, Pierre; Coheur, Joffrey ULg; Turchi, Alessandro et al

Conference (2017, June)

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See detailDevelopment of a unified model for flow-material interaction applied to porous charring ablators
Coheur, Joffrey ULg; Schrooyen, Pierre; Turchi, Alessandro et al

Conference (2017, June)

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See detailVariable selection in proportional hazards cure model with time-varying covariates, application to bank failures
Beretta, Alessandro ULg; Heuchenne, Cédric ULg

Conference (2017, June)

In the last three decades, as a consequence of failures and corporate actions, the number of commercial banks in the United States has shrunk by two thirds. Empirical evidence in the analysis of bank ... [more ▼]

In the last three decades, as a consequence of failures and corporate actions, the number of commercial banks in the United States has shrunk by two thirds. Empirical evidence in the analysis of bank failures suggests the existence of banks which are not susceptible to default. For this reason, we use a semi-parametric proportional hazards cure model with time-varying covariates to study their effects either on the probability that a bank is susceptible to default and on the survival time of failed institutions. We propose a penalized maximum likelihood method for the selection of the most significant variables, using a Smoothly Clipped Absolute Deviation (SCAD) penalty. A simulation study shows that this procedure performs reasonably well. We apply this methodology to a quite large sample of United States commercial banks insured by the Federal Deposit Insurance Corporation (FDIC) and with more than 50 million dollars of total assets during the last quarter of 2002. More in detail, we use bank-specific covariates observed on a quarterly basis until the end of 2015, that we use as proxies for capital adequacy, asset quality, earnings, management efficiency, liquidity, cost structure and size. [less ▲]

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See detailDo nonbelieved memories typically refer to childhood memories?
Vanootighem, Valentine ULg; Brédart, Serge ULg

Conference (2017, May 31)

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See detailNON-PATHOLOGICAL AGING OF THE EXECUTIVE FUNCTIONS: INFLUENCE OF THE VAL108/158MET NUCLEOTIDE POLYMORPHISM OF THE COMT GENE
Gilsoul, Jessica ULg; Manard, Marine ULg; Collette, Fabienne ULg

Conference (2017, May 31)

Introduction. According to the Dual-State Theory of prefrontal cortex dopamine, Val/Val polymorphism of the COMT gene would favor better flexibility abilities, whereas Met/Met carriers would favor better ... [more ▼]

Introduction. According to the Dual-State Theory of prefrontal cortex dopamine, Val/Val polymorphism of the COMT gene would favor better flexibility abilities, whereas Met/Met carriers would favor better stability abilities. These genotypic effects should be magnified in older people, as a decrease in cognitive resources increases the influence of individual genetic differences on cognitive performance. Therefore, the aim of the study is to investigate the influence of the COMT Val108/158Met nucleotide polymorphism on executive functions in normal aging. Method. We assessed the executive processes of inhibition, shifting, and updating thanks to many different tasks in groups of young (n = 55) and aged participants (n = 45) carrying one of the three polymorphisms of the COMT gene (Val/Val, Val/Met, Met/Met). T-tests between our two groups (Young versus Aged) but also a 6 (Group: Young-Met/Met, Young-Val/Met, Young-Val/Val, Old-Met/Met, Old-Val/Met, and Old-Val/Val) X 3 (Executive functioning: Inhibition, Shifting, and Updating) repeated measure ANOVA with Executive functioning as within-subject factor (p < .05) were carried out. Results. Young and old participants significantly differed on the three executive functions. The comparison of genotypic groups showed no significant differences in young or older participants respectively. Interestingly, the Old-Val/Val group showed a lower performance than the young one on inhibition tasks. Discussion. As expected, we found an age effect on all the executive functions. The significant difference between the Young-Val/Val and the Old-Val/Val groups on inhibition suggests an age-related decrease in abilities requiring a stability component in individuals possessing a less favoring genotype for this component. [less ▲]

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See detailNarration et argumentation. Retour sur l’analyse du discours en sciences sociales
Lttr13; Badir, Sémir ULg; Polis, Stéphane ULg et al

Conference (2017, May 31)

En 1979 a paru un ouvrage dirigé par A.J. Greimas et É. Landowski, intitulé « Introduction à l’analyse du discours en sciences sociales ». L’ouvrage n’a pas connu le succès de son contemporain, publié la ... [more ▼]

En 1979 a paru un ouvrage dirigé par A.J. Greimas et É. Landowski, intitulé « Introduction à l’analyse du discours en sciences sociales ». L’ouvrage n’a pas connu le succès de son contemporain, publié la même année, le célèbre « Sémiotique. Dictionnaire de la théorie du langage ». On souhaite dans cette communication proposer un bilan critique, en comparant les postulats de la méthode sémiotique avec ceux d’autres modèles d’analyse, et soulever quelques questions théoriques relatives aux types de discours. L’ouvrage de Greimas et Landowski s’inscrit dans le projet général d’extension du modèle narratif d’analyse textuelle. Selon ce projet, le modèle initialement développé en vue de l’analyse des contes et des mythes peut être appliqué à différents types de discours en envisageant dans leur variété, suivant « un degré croissant de complexité et d’abstraction », les « formes de production sociale du sens » (Greimas & Landowski, p. 5, passim). Le modèle étend ainsi la notion de récit à tout type de discours, à toute forme textuelle, ainsi que le confirme le « Dictionnaire ». Cette extension généralisée prend appui sur une typologie des discours qu’illustrent des analyses particulières publiés dans les années 1980 (Bastide 1981 ; Bastide & Fabbri éds 1985 ; Landowski 1986). Déjà en 1966, dans « Sémantique structurale », Greimas prévoyait une typologie de quatre types de « micro-univers sémantiques » (p. 128) où s’opposent, en fonction de deux critères, les univers dits « idéologiques » (dont ressortit le conte populaire) et les univers « scientifiques ». On peut considérer que la proposition de recherche qu’ont dirigée Greimas et Landowski est ainsi située au point le plus éloigné d’élaboration et d’application initiale du modèle suivi et qu’elle constitue par conséquent une expérience-limite pour le modèle narratif. Ce faisant, l’approche sémiotique prenait le risque d’être confrontée à d’autres modèles d’analyse, tels qu’ils se sont élaborés dans des cadres théoriques issus de la rhétorique (réactualisée dans les années 1950 par Chaïm Perelman et son école), de la pragmatique (cf. Parret 1983 & 1987), de la sociologie de la connaissance (à partir de l’ouvrage fondateur de Berger & Luckmann 1966) ou comme ils relèvent d’autres courants théoriques en sciences du langage (notamment, en France, l’analyse du discours d’inspiration althussérienne). Pour l’analyse des discours en sciences sociales, ces modèles offrent deux avantages sur celui de la sémiotique : d’une part, il semble que les postulats théoriques sur lesquels ils sont construits s’accordent plus directement au type que ces discours constituent ; d’autre part, ils peuvent désormais compter sur une solide tradition d’études permettant de pérenniser les résultats. La congruence apparente entre modèles d’analyse et types de discours, malgré l’extension d’applicabilité à laquelle ces modèles peuvent prétendre, soulève des questions relatives à la légitimité d’une typologie des discours. Celle-ci peut-elle se mettre au-dessus des postulats théoriques qui forgent les appariements entre modèle d’analyse et type de discours ? Si ce n’est le cas, quels enjeux la question typologique permet-elle de soulever ? Outre celle de Greimas évoquée plus haut, les tentatives qui ont été proposées à ce sujet (notamment van Dijk 1972 & 1975 ; Adam 1999 & 2011 ; Bronckart 1997 ; Maingueneau 2007), nous permettront d’en donner au moins une idée. [less ▲]

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See detailLe "Good Lives Model", un modèle novateur d'intervention au service des besoins de l'usager: Expérience d'adaptation au sein de l'hôpital psychiatrique sécurisé "Les Marronniers" à Tournai
Henrard, Noémie ULg; Devillers, Bérengère ULg; Oswald, Pierre et al

Conference (2017, May 31)

L’Hôpital Psychiatrique Sécurisé (H.P.S.) « Les Marronniers » de Tournai fut la première équipe francophone, en collaboration avec le Groupe Antigone, à avoir adapté le Good Lives Model (GLM) à une ... [more ▼]

L’Hôpital Psychiatrique Sécurisé (H.P.S.) « Les Marronniers » de Tournai fut la première équipe francophone, en collaboration avec le Groupe Antigone, à avoir adapté le Good Lives Model (GLM) à une population psychiatrique (GLM – FM). Le cadre théorique et méthodologique du G.L.M – FM offre la possibilité de dépasser le paradigme du risque/rechute en proposant des principes et outils qui guident l’intervention tout en tenant compte du rôle des symptômes psychiatriques/infraction et des besoins humains fondamentaux de l’usager. Le G.L.M – FM implique d’élaborer avec l’usager un « Good Live Plan », plan de vie visant à satisfaire les besoins humains fondamentaux et à accéder à une meilleure qualité de vie. Le G.L.M- FM intègre à la fois les risques et les perspectives de réadaptation, et ce, dans une approche globale, intégrée et cohérente. Objectifs : - Présenter les fondements théoriques et les principes cliniques de base qui guident le Good Lives Model - Forensic Mental Health ; - Présenter différents outils cliniques (général et spécifique) permettant l’opérationnalisation du GLM-FM ; - Développer l’expérimentation et l’adaptation du G.L.M. réalisé au sein de l’H.P.S. de Tournai au travers des projets UET et Epicéas. Méthodes d’apprentissage : - Expérimentation par les participants d’un des champs de l’outil de l’Inventaire des Souhaits et Préoccupations Personnels (ISPP) ; - Articulation des principes théoriques et cliniques ; [less ▲]

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See detailLogical tools for descriptive psychology. Set theory and foundational mereology
Leclercq, Bruno ULg

Conference (2017, May 30)

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See detailObservation and simulation of ethane at 22 FTIR sites
Mahieu, Emmanuel ULg; Franco, Bruno ULg; Pozzer, Andrea et al

Conference (2017, May 30)

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See detailPhysiopathologie des tendinopathies
Kaux, Jean-François ULg

Conference (2017, May 28)

Le tendon, tissu conjonctif fibreux, mécaniquement responsable de la transmission de la force des muscles vers les os, constitue une entitédynamique qui, en fonction des contraintes, se restructure en ... [more ▼]

Le tendon, tissu conjonctif fibreux, mécaniquement responsable de la transmission de la force des muscles vers les os, constitue une entitédynamique qui, en fonction des contraintes, se restructure en permanence et, ce, grâce à diverses modifications métaboliques et mécaniques. Cetterevue décrit l’histologie, la vascularisation et l’innervation du tendon sain. De plus, la biomécanique et les réponses physiologiques tendineuses,ainsi que la physiopathologie de la tendinopathie y sont abordées. [less ▲]

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See detailActualités des traitements conservateurs des tendinopathies
Kaux, Jean-François ULg

Conference (2017, May 28)

Les connaissances et la prise en charge des tendinopathies ont beaucoup évolué depuis ces dernières années. En effet, se substituant désormais à l’ancienne appellation « tendinite », les tendinopathies ... [more ▼]

Les connaissances et la prise en charge des tendinopathies ont beaucoup évolué depuis ces dernières années. En effet, se substituant désormais à l’ancienne appellation « tendinite », les tendinopathies sont majoritairement décrites selon le modèle de continuum établi par Cook et Purdam. La compréhension de la physiopathologie de ces lésions a permis l’émergence de nombreux traitements dans le but d’obtenir une récupération optimale et une limitation des récidives. L’objectif de cet article est de faire une revue de l’actualité thérapeutique des tendinopathies. [less ▲]

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See detailMultifunctional poly(ionic liquid)s: from synthesis to applications in energy and environment
Detrembleur, Christophe ULg; Patil, Nagaraj ULg; Debuigne, Antoine ULg et al

Conference (2017, May 24)

Poly(ionic liquid)s (PILs) are a subclass of polyelectrolytes that gained an enabling role in many fields of polymer chemistry and material science. PILs combine the unique properties of ionic liquids ... [more ▼]

Poly(ionic liquid)s (PILs) are a subclass of polyelectrolytes that gained an enabling role in many fields of polymer chemistry and material science. PILs combine the unique properties of ionic liquids with the flexibility and properties of macromolecules, and provide novel attractive functions. Recently, the precision design of novel PILs by controlled/living polymerization (CLP) techniques was intensively searched for developing emerging applications. This talk will first discuss recent routes for the precision synthesis of all vinyl-imidazolium based (co)polymers in water or in organic media under non-demanding experimental conditions. We will then describe the preparation of innovative redox and surface active PILs, and show the potential of these PILs in battery applications and for multifunctional coatings. More specifically, we will show how macromolecular engineering can be exploited for designing innovative polymer cathodes for ultra-high performance Li storage with unprecedented performances (high capacities and ultra-long life-span over more than 3000 cycles at an extreme current-rate). This innovative and effective molecular design for polymer cathodes opens up new horizons in developing an economical and environmentally benign platform for large-scalable fabrication of high performance batteries. [less ▲]

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See detailCe que devait encore révéler le site de la Schola del Traiano à Ostia Antica
Morard, Thomas ULg

Conference (2017, May 24)

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See detailPolyphosphoesters: new trends in synthesis and drug delivery applications
Jérôme, Christine ULg

Conference (2017, May 24)

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See detailTime, preference and intensity: A contrastive study of rather (than) and eerder (dan)
Ghesquière, Lobke; Brems, Lieselotte ULg

Conference (2017, May 24)

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See detailEssential oil of Tunisian plant: biopesticide applied in agricultural system
Ben Kaab, Sofiène ULg; ksouri, riadh; Jijakli, Haissam ULg

Conference (2017, May 23)

The use of plant-derived products in postharvest disease management may be a valid alternative to conventional chemical treatments (Pane et al., 2016). Unfavorable environmental conditions (such as salt ... [more ▼]

The use of plant-derived products in postharvest disease management may be a valid alternative to conventional chemical treatments (Pane et al., 2016). Unfavorable environmental conditions (such as salt and drought) increase production and accumulation of reactive oxygen species (ROS). Consequently, Tunisian plants have developed adaptive responses including the synthesis of specific bioactive molecules used for medical and nutritional purposes (Ksouri et al., 2012). In that context, the main objective of the present study was the identification of essential oils from Tunisian plants against the important plant pathogens, particularly in Europe. The study began with the selection of endemic medicinal plant suspected to present antimicrobial properties. The essential oil was extracted by hydrodistillation using a Clevenger type apparatus (with a yield of 1.2%). The chemical composition of the essential oil obtained by hydro-distillation from the aerial parts was analyzed by GC/MS. Therefore, antifungal activity was evaluated against Fusarium culmorum, Fusarium oxysporum and Penicillium italicum, using ELISA microplates with a blocked randomized design, as described previously (Kouassi et al., 2012). In addition, the essential oil was then tested for their herbicidal activities in pre-emergence and post-emergence assays against three weeds species. The chromatographic analysis showed a complex mixture where twenty compounds were identified accounting for 98.75 % of the total oil. Monoterpenes was represented by 71.73 %. The dominant monoterpenes are α Pinene (7.09%), 1,8-Cineole (54.6%) and Camphor (12.27%). Essential oil reduced significantly spores germination in a dose-dependent manner. Their fungistatic activity reached 100% at 0.6% against Fusarium oxysporum . In the dose response bioassay, the essential oil reduced seed germination rate of Phalaris minor, Sylibum marianum and Trifolium incanatum. Seedling growth was measured by shoot and root lengths at day 7. At 0.5%, essential oil reduced 100% seed germination. Post-emergence bioassays consisted in spraying essential oil at 3 concentrations (0.75, 2 and 3.4 %) at 2 leaves stage of three weeds species. Pelargonic acid was used as commercial positive control at 3.4%. At 0.75% and 2%, the essential oil do not show any sign of injury. However, only at 3.4 %, the spraying of essential oil showed visible injury ranging from wilting (after 1 day) and chlorosis (after 3 day) on Trifolium incanatum and Phalaris minor. After formulation, to enhance the distribution, the coverage and the penetration of the active molecules, the essential oil presented a high herbicidal activity. In conclusion, this work allowed to open new perspectives on the application of Tunisian essential oil as Novel biocontrol strategies against damageable plant pathogens and weeds. [less ▲]

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See detailCorrection de questions à réponses ouvertes: le logiciel SQORE
Crahay, Vinciane ULg; Bonnet, Pierre ULg

Conference (2017, May 23)

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See detailStudy of volatile organic compounds active against barley pathogens
De Clerck, Caroline ULg; Kaddes, Amine ULg; Fiers, Marie et al

Conference (2017, May 23)

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See detailMerging CO2 transformation and utilization with renewable bio-resources: a step forward to a double vision of sustainable chemistry
Grignard, Bruno ULg; Poussard, Loïc; Raquez, Jean-Marie et al

Conference (2017, May 22)

Valorizing waste CO2 as a cheap, inexhaustible and renewable C1 feedstock is an early stage technology with strong innovation potential that imposes itself as a strategic driver for developing future low ... [more ▼]

Valorizing waste CO2 as a cheap, inexhaustible and renewable C1 feedstock is an early stage technology with strong innovation potential that imposes itself as a strategic driver for developing future low carbon footprints materials. Beside its use as raw chemical, the “physical” valorization of CO2 in a series of industrial cost-efficient processes will also accelerate the development of a low carbon economy and support the elaboration of a global low carbon vision scheme. The synergistic and paradigm-transforming holistic project we propose perfectly illustrates these concepts by encompassing a “cradle” to “grave” vision, i.e. from the products conception from CO2 and bio-resources to their production and processing through sustainable processes compatible with existing industrial relevant infrastructures. It focuses on the elaboration of sustainable isocyanate-free polyurethane foams with promising thermal insulation properties. By its objectives, this study also proposes an ideal alternative to the conventional synthesis of PUs and a practical answer to the challenge the PU sector is facing due to changes in the REACH regulations limiting the use of isocyanates. The success of the project relies on 3 key steps involving: i) The synthesis of bio- and CO2-sourced cyclic carbonates monomers: Due to the low reactivity of CO2 versus epoxides, addition of catalysts is necessary. To overcome this limitation, we developed a new highly-efficient bicomponent homogeneous organocatalyst that showed unexpected activity for the fast (within a few minutes) and selective addition of CO2 onto model epoxides and epoxidized vegetable oil under solvent-free and mild experimental conditions at the multiKg scale. The use of this powerful dual organocatalyst was further extended to the first organocatalytic coupling of CO2 with less reactive oxetanes to produce hydroxyl telechelic oligocarbonate entering the synthesis of CO2-sourced conventional PUs. - The synthesis of sustainable bio- and CO2- sourced isocyanates-free polyurethanes (NIPU): Sustainable NIPUs were produced by step-growth polymerization between the so-produced bio- and CO2-sourced cyclic carbonates and biosourced amino-telechelic comonomers derived from linseed fatty acids according to a process compatible with existing industrial infrastructures (extrusion). - The foaming of NIPUs: Sustainable foams with thermal insulation were produced by the supercritical CO2 assisted foaming technology. Due to its solubility in polymers, CO2 can replace conventional flammable VOCs and ozone depletion physical blowing agents as hydro- or fluorocarbons exhibiting long atmospheric life-time and/or mean global warming potential 2800 higher than CO2. By finely choosing the CO2 impregnation and the foaming conditions, low density microcellular NIPU foams with a thermal conductivity as low as 0.050 Wm-1K-1 were produced. Our study shows that CO2 is not only sequestered in the material for long-term application, but is also valorized as a blowing agent in the production of sustainable thermally insulating NIPU foams. Such low carbon footprints materials will contribute to energy conservation and savings by reducing CO2 emissions. [less ▲]

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See detailDEVELOPPEMENT D’UN MODELE DE SYSTEME DE CLIMATISATION AUTOMOBILE MULTI-EVAPORATEURS
Gillet, Thomas ULg; Gendebien, Samuel ULg; Lemort, Vincent ULg et al

Conference (2017, May 22)

La modélisation numérique d’un climatiseur d’automobile multi-évaporateurs, composé de deux évaporateurs et d’un refroidisseur d’eau, a été réalisée à l’aide du logiciel LMS Imagine.Lab Amesim® 1D avec le ... [more ▼]

La modélisation numérique d’un climatiseur d’automobile multi-évaporateurs, composé de deux évaporateurs et d’un refroidisseur d’eau, a été réalisée à l’aide du logiciel LMS Imagine.Lab Amesim® 1D avec le fluide frigorigène R-134a. Un banc d’essai capable de reproduire les conditions extérieures d’un climatiseur automobile a été conçu afin de tester l’architecture de cette machine multi-évaporateurs avec le fluide frigorigène R-1234yf. Les bilans thermiques des premiers résultats expérimentaux sont analysés et présentés. Afin d’illustrer la complexité du contrôle d’une telle architecture en régime dynamique, l’activation d’une vanne électromagnétique dans la boucle batterie du banc d’essais est présentée. Enfin, une perturbation de type échelon a été générée dans le modèle numérique afin de vérifier si les phénomènes transitoires observés expérimentalement sont reproduits. [less ▲]

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