References of "Scientific congresses and symposiums"
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See detailL’idéologie « modernisatrice » et la profession d’avocat : vers plus d’efficience pour la Justice belge ?
Dubois, Christophe ULiege; Mansvelt, Valérie ULiege

Conference (2018, June)

Alors que de nombreux auteurs soulignent la crise actuelle de la profession d’avocat et la nécessité concomitante qu’elle rencontre de se redéfinir (Karpik, 2003 ; Wickers & Jamin, 2010 ; Susskind, 2017 ... [more ▼]

Alors que de nombreux auteurs soulignent la crise actuelle de la profession d’avocat et la nécessité concomitante qu’elle rencontre de se redéfinir (Karpik, 2003 ; Wickers & Jamin, 2010 ; Susskind, 2017), cette communication vise d’abord à rendre compte de la contribution des avocats au processus de « modernisation » de la Justice en situant leurs initiatives dans un paysage plus large de réformes politiques du monde judiciaire belge et européen. Il s’agira ensuite d’appréhender les controverses soulevées par ce processus de « modernisation » de la Justice, de la profession d’avocat et du marché des services juridiques, ainsi que de l’idéologie qui la sous-tend. [less ▲]

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See detailLa « rue romaine » en Italie : un espace construit et aménagé pour répondre aux besoins économiques des cités ?
Mainet, Grégory ULiege

Conference (2018, May 25)

The imperial streets of Ostia and Rome - as they appear on the severian Forma Urbis Romae - were edged by many shops, which shaped the streetscape of these cities. This situation is common in modern ... [more ▼]

The imperial streets of Ostia and Rome - as they appear on the severian Forma Urbis Romae - were edged by many shops, which shaped the streetscape of these cities. This situation is common in modern downtown, but it was not in Antiquity. In greek cities such as Priene or Olynthus, the space of the street is so different : since there is few doorways in the buildings façades, the frontages are more simple and the buildings more segregated from the thoroughfares. We observe the same characteristics in some italian cities, like Norba, destroyed at the begining of the 1st century BC. Indeed, the streetscape seems to change from the Late-Republic in Italy : at Ostia for instance, we observe late-republican tabernae along the Decumanus, under the Horrea of Hortensius. The progressive development of shops along urban thoroughfares shows evidence of the economic facilities offered by the space of the street, made up of building façades, roadway and street furnitures. This built framework hosts shopkeepers and their commercial activities, because it gave some market opportunities to them, just as a macellum, but far and wide throughout the city. So far, this architectural environment has been neglected in favor of the street network and the traffic. This paper would consider the evolution of the architecture of the streets in Italy, between the Mid-Republican time and the Severian period, and highlight the role played by the "street-as-market" in the organisation of urban economy. [less ▲]

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See detailJoyce/Svevo
Delville, Michel ULiege

Conference (2018, May 02)

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See detailHellenistic cultic foundations for the dead: Civic, royal, individual, and groups' initiatives in interaction
Caneva, Stefano ULiege

Conference (2018, May)

The paper explores the interaction between different kinds of social agents in the funding and management of cult foundations for the dead in the late-classical and Hellenistic period. Textual and ... [more ▼]

The paper explores the interaction between different kinds of social agents in the funding and management of cult foundations for the dead in the late-classical and Hellenistic period. Textual and archaeological dossiers will be discussed in order to 1) investigate the occupation of sacred space in existing sanctuaries and other public spaces as well as the creation of new sacred places, specifically meant to host ritual practice for dead individuals or groups; 2) provide a comparative analysis of the patterns of establishment, funding and management of cult foundations pertaining to civic, royal, individual or groups' initiatives; 3) explore the forms of interaction between various agents involved, e.g. between civic and private initiative in funding and management. When possible, these considerations will also be integrated with an evaluation of the religious status attributed to the honoured persons, with particular attention to the semantic fields of heroization and deification. Thus an attempt will be made at tracking down possible general trends of religious administration beyond local particularities, and at schematizing these configurations in a model taking into account four factors: the social status of ritual agents and recipients; the religious status acknowledged to cult recipients; the methods of funding and management; the degree of monumentalization and social impact of the cult foundations. [less ▲]

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See detail“Death is the only real utopia”: Adorno and Kluge on television
Cormann, Grégory ULiege

Conference (2018, May)

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See detailL’École des Annales et ses ‘marges’
Genin, Vincent ULiege; Dosse, François

Conference (2018, April 25)

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See detailLa liberté des pathologies (ou les pathologies de la liberté)
Englebert, Jérôme ULiege

Conference (2018, April 24)

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See detailBehavior of steel frame structures under natural fire and collapse mechanisms during cooling
Gernay, Thomas ULiege; Gamba, Antonio; Elhami Khorasani, Negar

Conference (2018, April 20)

Structural fire engineering has long relied on a prescriptive approach based on isolated member behavior under continuously heating standard fire. By definition, this approach does not allow comprehending ... [more ▼]

Structural fire engineering has long relied on a prescriptive approach based on isolated member behavior under continuously heating standard fire. By definition, this approach does not allow comprehending the effects of interaction between members of a complete structure nor the effects of real fire exposure. Yet, such effects can have a significant influence on the response of real buildings to fire. Notably, when a structure has survived a fully developed fire, the cooling phase that inevitably follows generates effects that may endanger the structure stability. This has been attested by real structural collapses and poses a specific threat to firefighters. However, the behavior of structures under natural fire and the causes of failure during cooling are still not well understood. This research investigates the response of steel-framed structures to natural fires with the aim to analyze the possible collapse mechanisms during cooling. Numerical simulations by nonlinear finite element method are conducted for different fire scenarios and structural designs. The simulations model the thermo-mechanical behavior of the frames accounting for the interaction between members during the entire fire duration until burnout. Different collapse mechanisms during cooling are highlighted and discussed, including connection failure and progressive collapse under localized fire. In the latter case, collapse of members not directly affected by the fire occurs during the cooling phase. These mechanisms result from a complex combination of several factors, such as the recovery of thermal elongation, the recovery of stiffness, and the prior development of permanent strains in the heated members. The results show that steel-framed structures are subject to collapse during the cooling phase of natural fires. Therefore, natural fires with heating-cooling sequences represent a loading case that should be considered in structural fire analyses and could lead to specific design provisions to prevent the occurrence of collapse during cooling. [less ▲]

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See detailDéfaire l’art : gommages et coupes sombres
Delville, Michel ULiege

Conference (2018, April 19)

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See detailAvowal and recognition in psychopathology: philosophical issues about anosognosia
Englebert, Jérôme ULiege

Conference (2018, April 18)

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See detailRhinologic Emergencies: a Prospective Audit in a University Teaching Hospital
ROGISTER, Florence ULiege; ATTA, Lucas; Delrez, Sophie ULiege et al

Conference (2018, April)

Aims: Increasing pressure to reduce healthcare cost threatens the provision of acute ENT coverage round the clock. Our goal was to audit our emergency rhinologic activity over a one-month period. Methods ... [more ▼]

Aims: Increasing pressure to reduce healthcare cost threatens the provision of acute ENT coverage round the clock. Our goal was to audit our emergency rhinologic activity over a one-month period. Methods: A prospective audit for all emergency ENT referrals was carried out from May 1st to May 31th 2017. Descriptive statistics were produced for age, sex, origin, time of arrival, diagnosis and outcome. A specific subgroup analysis was performed for rhinologic emergencies. A basic cost analysis was ran. Results: Over the study period, 190 patients were referred to the ENT emergency service. Twenty percent patients presented with nose or sinus complaint (36.8% with otological or neuro-vestibular primary complaint, 43.2% with laryngeal or neck complaint). Nose and throat complaints were more likely to present at night or on weekends. Ear complaints were more likely to present during business hours. Rhinologic complaint was more likely to require technical or surgical management than ear or throat complaint. Patients with nose complaint required minor procedure in 43.2% cases (35.6% of the total minor procedures), and required surgical procedure in 13.5% cases. Among the total ENT emergency surgical procedures, 62.5% were rhinologic ones, involving the nose (50%) or the sinus (12.5%). Ear or throat initial complaint were more likely to require no treatment or ambulatory management. Conclusion: The emergency rhinologic activity is justified in our hospital. An initial rhinological complaint was more likely to require specific ENT management than other complaints. ENT cover is an efficient service provision, especially for rhinologic emergencies. [less ▲]

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See detailHolocene paleoclimate reconstructions from Belgian continental archives (HOPES)
Allan, Mohammed ULiege; lenoir, guillaume; Verheyden, sophie et al

Conference (2018, April)

Comparing climate reconstructions based on proxy data approach with climate modelling enables to test both assumptions underlying the interpretation of climate reconstructions and to refine predictive ... [more ▼]

Comparing climate reconstructions based on proxy data approach with climate modelling enables to test both assumptions underlying the interpretation of climate reconstructions and to refine predictive models. Among geological archives, speleothems (secondary carbonate deposits in caves) and peatbogs are now regarded as important archives of past climatic and environmental conditions on the continents, offering a number of advantages relative to other continental archives (such as lake sediments, tree rings, ice cores). Both archives, presented in Belgium, are reliable continental environmental archives of high interest due to their dating possibilities and their possibility to preserve multi-proxy records of environmental and climatic dynamics. Combining studies on speleothems and peatbogs from the same area was provided an age-constrained reconstruction of climatic variability at decennial resolution for key intervals of the Holocene (6.5 to 5.5 ka, 5.2 to 4.2 ka and 3.2 to 2.2 ka). The reconstructed precipitation and temperature curves in NW European settings, as proposed in HOPES, are essential to better constrain the Northern Hemisphere climatic record and to test climate models. Our strategy was derived from a comparative study of two continental archives: speleothems and peatbogs. Time series of elemental and stable isotope geochemistry were established for the 2 archives. Precipitation and humidity conditions over Belgium was reconstructed by integration of results derived from the two continental archives. Such comparison allows to reduce the bias related to the specific sensitivity to climate changes of each archive. Time-series was first screened using classical time-series analysis techniques in order to detect potential quasi-periodic patterns in the paleoclimate records. As a second step, statistical modeling will be developed to associate peatbog and speleothem data in a single, consistent framework at the Belgian scale, and then to associate these data into larger data network. Our data will thus complement the information on rapid climate change and regional variability across Europe gained through research programs funded by the European Science Fundation and the European commission like Holivar (www.esf.org), ACCROTELM (www2.glos.ac.uk/accrotelm/) or Past4Future (www.past4future.eu). [less ▲]

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See detailBaseline SNOT-22 as Outcome Predictor: a Powerful Tool just at Hand
ROGISTER, Florence ULiege; DE DORLODOT, Clotilde; ANSARI, Edward et al

Conference (2018, April)

Aims: SNOT-22 was initially designed for rhinosinusitis, but was recenty validated in various nose conditions. Nose or sinus complaint is a common cause of consultation in primary care or ENT clinic ... [more ▼]

Aims: SNOT-22 was initially designed for rhinosinusitis, but was recenty validated in various nose conditions. Nose or sinus complaint is a common cause of consultation in primary care or ENT clinic. Therefore we sought to optimize the simple and versatile instrument SNOT-22. Our aim was to determine the outcome of patients and healthy volunteers solely based on the pattern of the baseline SNOT-22 in a multi-centre study. Methods: Sixty-six healthy volunteers and 383 patients presenting to the rhinology clinic of the ENT academic departments of Godinne, Liege and Brussels participated in this study. SNOT-22 from all participants were collected blindly prior to diagnosis. Participants were then categorized in 5 groups according to their outcome: control, medical rhinologic condition, sinus surgery, functional nose surgery. SNOT-22 items relevant to each group were determined by multinomial logistic regression. Results: Control subjects showed the lowest SNOT-22 scores for all items. Medical rhinologic patients had lower scores than surgical patients. Patients requiring sinus surgery and those listed for nose surgery exhibited a specific pattern of SNOT-22 score. Most relevant items were #1 need to blow nose, #5 post-nasal discharge, #6 thick nasal discharge, #10 facial pain and #21 sense of smell. Conclusions: Distinct SNOT-22 patterns were correlated to subjects outcome. SNOT-22 was able to differentiate patients from controls, to score severity, and could further provide an accurate description of pathology. Baseline SNOT-22 could localize pathology in the sinus or in the nose and predict the need for surgical treatment. [less ▲]

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See detailThe Mesoproterozoic Sveconorwegian orogeny: orogen scale interpretation of metamorphic and magmatic patterns supports an ultra-hot collision model
Bingen, Bernard; Viola, Giulio; Möller, Charlotte et al

in Geophysical Research Abstracts (2018, April)

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See detailBayesian Inference on Uncertain Kinetic Parameters for the Pyrolysis of Composite Ablators
Coheur, Joffrey ULiege; Magin, Thierry; Chatelain, Philippe et al

Conference (2018, April)

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See detailGHRH-deleted Mice Are Severely Deficient in Vaccine And Immunological Responses Against Streptococcus Pneumoniae
Farhat, Khalil ULiege; Bodart, Gwennaëlle ULiege; Desmet, Christophe ULiege et al

Conference (2018, March 20)

Background and objective of the work. Ghrh-/- mice with a severe deficiency of their somatotrope GHRH/GH/IGF1 axis (1) are resistant to experimental allergic encephalomyelitis (2). In basal conditions ... [more ▼]

Background and objective of the work. Ghrh-/- mice with a severe deficiency of their somatotrope GHRH/GH/IGF1 axis (1) are resistant to experimental allergic encephalomyelitis (2). In basal conditions, thymus and T-cell development are not severely affected but a marked spleen atrophy and B-cell lymphopenia were constantly observed (3). Therefore, we investigated vaccinal and anti-infectious responses of Ghrh-/- mice against S.pneumoniae, a T-independent pathogen. Results. Transgenic mice were unable to trigger production of specific IgM after vaccination with either native pneumococcal polysaccharides (PPS, Pnx23) or protein-PPS conjugate (Prev13). GH treatment of Ghrh-/- mice restored IgM response to Pnx23 vaccine but not to Prev13 suggesting that GH exerts a significant impact on the spleen marginal zone that is strongly implicated in T-independent immunological response to pneumococcal polysaccharides. After intranasal instillation of a non-lethal dose of S.pneumoniae, Ghrh-/- mice exhibited a dramatic susceptibility with a time-dependent increase in lung bacterial load, a bacteremia already after 24h, and a survival limit of 48-72h. In marked contrast, WT and heterozygote mice completely cleared S.pneumoniae infection after 24h. Lungs of infected Ghrh-/- mice were massively infiltrated by inflammatory macrophages, while lung B cells were markedly decreased. Transcription of Ifng, Il10, Cd40, and Cxcl9 was highly increased in the lungs of infected Ghrh-/- mice, whereas Tgfb and Iggj transcripts were unchanged. Resistance of Ghrh-/- mice to infection by influenzavirus H1N1 (a T-dependent antigen) was normal or slightly decreased. Conclusion. This animal model shows that the somatotrope GHRH/GH/IGF1 axis plays a vital and unsuspected role in the vaccine and immunological defense against S.pneumoniae. [less ▲]

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See detailA Prospective Audit of Acute ENT Activity in a Teaching Hospital.
Goffinet, Maxime ULiege; ATTA, Lucas; Delrez, Sophie ULiege et al

in B-ENT (2018, March 03)

Introduction and aim: Acute ENT coverage is available out-of-hours in most hospitals. However, increasing pressure to reduce healthcare cost threatens this service provision round the clock. Our goal was ... [more ▼]

Introduction and aim: Acute ENT coverage is available out-of-hours in most hospitals. However, increasing pressure to reduce healthcare cost threatens this service provision round the clock. Our goal was to audit the emergency ENT activity in our institution over a one-month period Material and methods: a prospective audit for all ENT referrals from the emergency department was carried out from May 1st to May 31th 2017. Descriptive statistics were produced for age, sex, origin, time of arrival, diagnosis and patient outcome. Results: a total of 190 patients (109 men and 81 women) were referred to the ENT emergency service over the study period (mean 6.1 case per day). Mean age was 47.9 (±23.6)year (range 1-95). Most patients were ambulatory (75.8%) and came from the area. Most admissions occurred during normal working hours (76.4%) and 62.0% patients came by self reference. The mean complaint duration before admission was 7.6 (±13.7) days (range 0-92 days). One third (33.2% patients) required ambulatory treatment. A quarter (24.7% patients) underwent a minor ENT procedure. Eighteen (9.5%) patients required admission to the ward (mostly for intravenous antibiotic). Eight patients (4.2%) required surgical treatment. There was no difference in the severity of diagnosis or management between patients referred by a physician (GP of specialist) and patients presenting spontaneously. At 30 days, 3 (1.6%) patients died (one of ENT cancer, two of unrelated cause), 106 (55.8%) benefited from an ENT follow’up, 65 (34.2%) were referred to another physician (GP or specialist), 16 (8.4%) were lost to follow’up. Conclusions: The workload suggests that emergency ENT activity is justified in our hospital. Restricting emergency ENT cover to patients referred by a GP or another physician would not allow for a better patient selection. [less ▲]

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See detailPost-irradiated Carotid Blowout Syndrome in patients with Nasopharyngeal Tumor: about 3 cases
DETROUX, Valentine ULiege; GOFFART, Yves; COLLIGNON, Laurent et al

in B-ENT (2018, March)

Introduction Rupture of the internal carotid artery (Carotid blowout syndrome) is a rare complication of irradiated nasopharyngeal tumor. We report three cases nasopharyngeal tumors treated with ... [more ▼]

Introduction Rupture of the internal carotid artery (Carotid blowout syndrome) is a rare complication of irradiated nasopharyngeal tumor. We report three cases nasopharyngeal tumors treated with radiotherapy complicated with bleeding of the internal carotid artery presenting as a massive epistaxis. Case Series The first case presented a few episodes of small nose bleeding before a massive one. Internal carotid embolisation was performed to stop the bleeding. Unfortunately, few month later, he presented a meningitis related to skull base osteoradionecrosis and died from sceptic shock. The second case was transferred to our hospital with severe repetitive epistaxis that had been occurring for hours. No endovascular treatment was possible in his case and he died in intensive care unitthe dayof his admission. The thrid case presented one massive epistaxis which stopped without any treatment or compression. A spontaneous occlusion of his internal carotid artery occured without any neurological defects. He recently benefited from a nasopharyngeal muscle flap for the coverage of the carotid artery. These three patients all presented with a history of nasopharyngeal tumor handled by radiotherapy. Pathogenesis, treatment, and outcome are discussed on the light of a comprehensive literature review. Conclusions Carotid blowout syndrome secondary to radiation therapy is rare but life-threatening. Re-irradiation and skull base osteoradionecrosis are strong predisposing factors. [less ▲]

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See detailConservation Ethics in the 21th Century: Towards an Extended Toolkit
Houbart, Claudine ULiege; Dawans, Stéphane ULiege

Conference (2018, March)

In his now classic essay on the « Régimes d’historicité », the French historian François Hartog (2003) has very well described the effect of globalisation, democratisation and mass consumerism on our ... [more ▼]

In his now classic essay on the « Régimes d’historicité », the French historian François Hartog (2003) has very well described the effect of globalisation, democratisation and mass consumerism on our relation with the past and thus, with heritage. In the course of the 1970’s, at a time when the ink of the Venice Charter was barely dry, postmodernity triggered a loss of collective anchoring and memory, paradoxically accompanied by an amplification of the thirst for commemorations, in the name of identity or heritage. Pierre Nora’s great endeavour « Les lieux de mémoire », fully corresponds to this « presentism » era, including aside from monuments, museum and archives, intellectual constructions such as the Larousse encyclopaedia (Nora 1989). It very well illustrates the « extension of the heritage domain » as defined by the sociologist Nathalie Heinich (2009). In our « post-monumental » era, anything can possibly become heritage, regardless of scale, of artistic qualities, of age or ontological degree – from tangible to intangible. This is a sign of times. Following the example of Nelson Goodman replacing the essentialist definitions of art with the question « When is there art ? » (Goodman 1976), we should consider focusing on a dynamic and operational definition of heritage. The question « When is there heritage ?» better correspond to contemporary cultural studies and our attempt to understand « heritagization »; it contains the idea of a performative action, implying new actors, new dynamics, new process, new research questions, new difficulties and new opportunities. And by necessity new concepts. We are far from rejecting theories from the past which provided us with effective and stimulating tools. But who could still imagine today, in the situation we described, that any system could fully encompass the heritage reality as the grand theories – Brandi, Riegl,… – succeeded to do? The repeated attempts to get the Venice charter revised from the 1970’s on (Houbart 2014), and the multiplication of thematic documents and charters are the best illustration of this impossibility. But while postmodern thinkers made us suspicious towards large systems, they also made us more modest and above all, more inclined to respect « bricolage », as a most helpful attitude after a shipwreck. We believe that the current return to a case by case approach – as promoted from the interwar period by theoreticians such as Ambrogio Annoni (1946) – often mostly relying on practical constraints such as reuse and technical performances, combined with the use of decontextualised concepts – separated articles from the Venice Charter, for example – and practices – using the Ise shrine periodical rebuilding to advocate any reconstruction project – doesn’t mean to accept a cynical relativism in answer to the cause of a capital-intensive machine. But in practice, we cannot deny that it has sometimes been the case: the clearest examples are the debates addressing the reconstruction of monuments all over Europe, based on a jumble of arguments confusing the pure mercantilism of the tourism industry or unconfessed political reasons with post-conflict identity issues or religious traditions (Monumental 2010). Reflecting on such reconstruction projects, raising questions of identity, has convinced us of the incompleteness of the toolkit we inherited from 20th century theoreticians. Though still perfectly relevant to address the issues that were already present at the time when they were elaborated, they might prove inappropriate to address new types of heritage, new concerns, new issues such as cultural tourism, inclusive approaches, modern heritage or the digital turn. In this context, we have been drawn to look at texts outside the conservation sphere, starting from ontology of art and analytical philosophy. We discovered that taking a step to the side could provide a stimulating insight on heritage conservation problems. In fact, it is not surprising that, facing what many have called a heritage inflation, some new actors could help us. Now that heritage has quitted the monuments sphere to encompass any material or immaterial reality worthy of conservation and that the expert point of view is challenged by the ones of a broad range of stakeholders, from the user to the investor, it becomes interesting to look at this reality from different points of view borrowed to a wide range of human sciences such as law, communication, aesthetics, semiotics, anthropology or philosophy, to name a few. Together with our colleague Muriel Verbeeck, we are currently gathering texts in order to propose an anthology that could complement the existing ones in helping to fill conceptual gaps and throw a reinvigorating light on new problems raising old questions. The originality of the project is to chose most texts outside the conservation world, and to address movable and immovable heritage at the same time. During our presentation, we will provide some examples of the usefulness of these new concepts, some already known by a number of conservators – such as the distinction proposed by Nelson Goodman between allography and autography (Goodman 1976) –, some not – the impact of intention on identity, based on texts by Theodore Scaltsas (1981), for example –, and will encourage the members of the committee who might be interested in this approach to contribute to the project. [less ▲]

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See detailOpal-like photoanodes with photonic effects in macroporous perovskite solar cells
Dewalque, Jennifer ULiege; Baron, Damien ULiege; Spronck, Gilles ULiege et al

Poster (2018, February 28)

Organic-inorganic metal halide perovskite compounds, used either in mesoscopic or planar solar cells architectures, have allowed preparing highly efficient solid-state devices (>20%). In mesoscopic solar ... [more ▼]

Organic-inorganic metal halide perovskite compounds, used either in mesoscopic or planar solar cells architectures, have allowed preparing highly efficient solid-state devices (>20%). In mesoscopic solar cells, a mesoporous TiO2 scaffold is incorporated into the cells. However, because of the small pore size compared to the wavelengths of visible light, the scaffold barely scatters light. In this work, we propose to design periodically structured TiO2 scaffold from colloidal crystal templating fabrication method. Polystyrene beads with diameters comparable to visible light wavelengths are used as structuring agent. The resulting opal-like photonic structure will strongly interact with light and increase light harvesting. The photoanode microstructure is characterized by scanning electron microscopy (SEM) and X-Ray diffraction (XRD). In parallel, light interaction is modeled in order to find the best compromise in terms of photonic architecture. Sunlight absorption by the solar cells is presented and discussed with dependency of pore sizes and number of opal-like layers. [less ▲]

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See detailComment prévenir le risque biologique en laboratoire ou animalerie de recherche ?
Grignet, Christine ULiege

Conference (2018, February 22)

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See detailRetour d’expérience sur Julia pour la recherche et l’enseignement en recherche opérationnelle
Cuvelier, Thibaut ULiege

Conference (2018, February 21)

The Julia programming language has a well-developed community, especially in operational research, including mathematical optimisation. Nevertheless, it already has many practical advantages, both for ... [more ▼]

The Julia programming language has a well-developed community, especially in operational research, including mathematical optimisation. Nevertheless, it already has many practical advantages, both for research and teaching. This talk offers some feedback based on several years of Julia usage. [less ▲]

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See detailBooster l’activité physique, le bien‐être et la santé à l’école dans le cadre du Pacte pour un Enseignement d’Excellence : Mission impossible ?
Bonni, Jérémy ULiege; Cloes, Marc ULiege

Conference (2018, February 21)

In the French speaking region of Belgium, an important reform of the educational system is in progress. Among the projects that are in preparation, one is focused on the promotion of physical activity ... [more ▼]

In the French speaking region of Belgium, an important reform of the educational system is in progress. Among the projects that are in preparation, one is focused on the promotion of physical activity, wellness and health at school. A working group is in charge of identifying and testing teaching tools that could be used by the practitioners in elementary education. The presentation describe the process that has been implemented in such a way and provide some examples of the current developments in order to inform physical educators about the evolution of their missions. [less ▲]

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See detailSynthesis of bimetallic catalysts supported on alumina by an aqueous sol-gel process
Lambert, Stéphanie ULiege

Conference (2018, February 20)

The thermochemical method called “biomass gasification” is generating emphatic interest for the production of bio-Syngas (CO+H2) since this process presents the advantage of being renewable without ... [more ▼]

The thermochemical method called “biomass gasification” is generating emphatic interest for the production of bio-Syngas (CO+H2) since this process presents the advantage of being renewable without emitting CO2. However, in practical applications, there are still some technical problems due to high concentration of tars in the outlet gas, which can condensate and clog the pipes. Previous studies have highlighted the fact that the tar elimination via catalytic reforming seem to be the more practical and economical solution. Catalysts were synthesized by an aqueous sol-gel process to develop γ-Al2O3 doped with 10 wt.% of nickel and 2 wt.% of a second dopant (Co, Cu, Fe, Mn, Mo). Before their adding in AlOOH sol, metallic dopants were complexed with (OCH3)3-Si-(CH2)3-NH-(CH2)2-NH2 (EDAS) to increase their dispersion by cogelation between EDAS and AlOOH clusters. All the samples were tested for toluene reforming at 650°C for 300 min. No previous reduction step has been realized. Each 15 min, injection was sent to a GC Compac for analysis. For samples Al2O3-10Ni-2Mn and Al2O3-10Ni-2Mo, the addition of Mn or Mo allows increasing the toluene conversion up to 100%, whereas all other samples present lower toluene conversion (around 30%). Taking into account the benzene selectivity, it is observed that Mn and Mo are both elements that favor the degradation of aromatic groups. In term of carbon deposit during catalytic test, sample Al2O3-10Ni-2Mn is the most interesting doping since only 0.04 gcarbon gcata-1 is depicted by TG-DSC measurement after catalytic test. [less ▲]

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See detailGames and multidimensional shape-symmetric morphisms
Rigo, Michel ULiege

Conference (2018, February 19)

The general motivation behind this talk is to present some interplay between combinatorial game theory and combinatorics on multidimensional words. We do not assume that the participants have any prior ... [more ▼]

The general motivation behind this talk is to present some interplay between combinatorial game theory and combinatorics on multidimensional words. We do not assume that the participants have any prior knowledge in CGT. Thus, we will present some basic concepts from combinatorial game theory (positions of a game, Nim-sum, Sprague-Grundy function, Wythoff’s game, ...). We will see that games provide examples of k-automatic, morphic or k-regular sequences (in the sense of Allouche and Shallit). Subtraction games played on several piles of token naturally give rise to a multidimensional setting. Thus, we consider k-automatic and k-regular sequences in this extended framework. In particular, determining the structure of the bidimensional array encoding the (loosing) P-positions of the Wythoff’s game is a long-standing and challenging problem in CGT. Wythoff’s game is linked to non-standard numeration system: P-positions can be determined by writing those in the Fibonacci system. The main part of this talk is to discuss the concept of shape-symmetric morphism introduced by Maes: instead of iterating a morphism where images of letters are (hyper-)cubes of a fixed length k, one can generalize the procedure to images of various shape. We will present several decision problems which are decidable thanks to automata. [less ▲]

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See detailConstructing futurity: a contrastive approach to L1 and L2 Dutch and French
Sambre, Paul; Perrez, Julien ULiege; Van Keirsbilck, Pascale et al

Conference (2018, February 16)

Context - Traditional grammar (Fleishman 1982) and constructional analyses of the future in other languages, largely concentrate on verbal predications (Berghs 2010, Hilpert 2008) as locus of futurity ... [more ▼]

Context - Traditional grammar (Fleishman 1982) and constructional analyses of the future in other languages, largely concentrate on verbal predications (Berghs 2010, Hilpert 2008) as locus of futurity. Furthermore, previous research in L1 (Dabrowska 2012) and L2 (Deknop et al. fc./2016) has shown individual productive variance in constructional profiles and lexical knowledge in adult speakers. Objective -This talk proposes a contrastive approach to describing constructional profiles and a conceptual network for futurity in L1 and advanced learners L2 Dutch and French (B1-C1 in CEFR). Corpus and procedure - The corpus is composed of elicited spoken Dutch and French, based on a questionnaire imposed on 20 L1/L2 speakers, who are asked questions about their future professional future in their mothertongue and thereafter in L2 Dutch or French (40 interactions). The questions combine different verb and nominal constructions for future time reference and are based on a usage-based construction network of futurity (AUTHOR 2009, 2012) inspired by Langacker's (2008) extended epistemic model. This conceptual CxG network future time includes variation in tense and epistemic modality. (Expected) results - We describe and measure the constructional L1 and L2 profiles, comparing/correlating them as to their productivity for futurity in L1/L2. There are two important extensions of previous studies on future constructions. (1) The future is conceived at the interface between different predication types. (2) Future talk is taken at the level of larger-than-clause interaction (Nikiforidou 2011; Östman 2004). (3) Non-epistemic modality and complex clauses encode future time. (4) The descriptive approach leads to guidelines for teaching more authentic L2 constructions for futurity based on L1 constructions beyond the traditional scope of verbs and/or modes in a coherent conceptual framework. [less ▲]

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See detailLe Contre de Lisle
Durand, Pascal ULiege

Conference (2018, February 09)

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See detailLos aztecas en Europa: genericidad de la ucronía hispanoamericana contemporánea
Francois, Jeromine ULiege

Conference (2018, February 09)

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See detailThe Translator's Visibility: from the Archives to the Internet
Letawe, Céline ULiege

Conference (2018, February 09)

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See detailMise en place d’un protocole de mesure de force musculaire des membres inférieurs à l’aide d’un pèse-personne
LIEGOIS, Kenny; Tubez, François ULiege

in Kinésithérapie, la Revue (2018, February 08), 18(194), 42-43

Objectif L’objectif de cette étude est de proposer le pèse-personne (Fig. 1) comme une alternative d’évaluation de la force musculaire des membres inférieurs. Pour ce faire, nous tentons de démontrer la ... [more ▼]

Objectif L’objectif de cette étude est de proposer le pèse-personne (Fig. 1) comme une alternative d’évaluation de la force musculaire des membres inférieurs. Pour ce faire, nous tentons de démontrer la répétabilité du protocole. Méthodologie L’étude porte sur vingt-neuf sujets âgés de 18 à 26 ans et étudiants en kinésithérapie. Les mesures ont été réalisées grâce à un pèse-personne digital placé sur un support attaché sur un espalier. Les positions d’évaluation sont au nombre de quatre, deux pour chaque groupe musculaire ; une en course interne et l’autre en course externe. La répétabilité de l’outil est évaluée et analysée grâce à un test Anova pour la comparaison des essais à un même temps, et pour la comparaison des valeurs à J0 et J7, nous avons utilisé le test de Pearson. Résultats Les 29 sujets ont terminé l’étude. La répétabilité de l’outil et du protocole mis en place a montré une forte corrélation ; avec un coefficient de corrélation intraclasse entre 0,90-0,98 (P-value < 0,05). Ensuite, les données ont été triées par groupe musculaire et course articulaire en regroupant tous les essais, ce qui a permis de réaliser un test Anova prouvant alors la répétabilité du procédé par une différence non significative. Conclusion Cette étude permet d’élargir les perspectives d’évaluation de la force musculaire. En comparaison aux autres méthodes quantitatives, le pèse-personne est peu co-teux et de surcroît, déjà intégré dans l’environnement du kinésithérapeute. [less ▲]

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See detailTocopherol content of almond oils produced in eastern Morocco
Melhaoui, R.; Fauconnier, Marie-Laure ULiege; Sindic, Marianne ULiege et al

Conference (2018, February 08)

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See detailWhat is the landscape of artisanal cheese production in Belgium?
Gerard, Amaury ULiege; Daube, Georges ULiege; Sindic, Marianne ULiege

Conference (2018, February 08)

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See detailTocopherol analysis of almond oils produced in eastern Morocco
Melhaoui, R.; Fauconnier, Marie-Laure ULiege; Sindic, Marianne ULiege et al

Poster (2018, February 08)

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See detailLa modélisation 3D comme outil de convergence des données au service du projet patrimonial
Hallot, Pierre ULiege; Houbart, Claudine ULiege

Conference (2018, February 08)

L’une des difficultés rencontrées par les étudiants en architecture confrontés au patrimoine classé (ou non) est la prise en compte des données multiples issues de l’étude interdisciplinaire du bien ... [more ▼]

L’une des difficultés rencontrées par les étudiants en architecture confrontés au patrimoine classé (ou non) est la prise en compte des données multiples issues de l’étude interdisciplinaire du bien concerné, qu’ils en soient ou non les auteurs. Données historiques et archéologiques, identification des matériaux et pathologies, étude de la structure, potentiel et limites d’usage, sont autant de paramètres qui doivent guider les options de restauration ou de reconversion, mais qui sont trop souvent mis de côté, voire oubliés, au moment de passer au stade du projet. Dans ce contexte, nous sommes convaincus que la modélisation 3D du patrimoine, peut, en plus de fournir les données dimensionnelles indispensables au projet, servir de support virtuel à la représentation des données collectées. La convergence des savoirs dans une structure intégrée peut constituer un outil au service de l’évaluation patrimoniale et de l’établissement d’un projet en pleine connaissance de cause. La modélisation 3D dans un environnement virtuel permet de confronter plus aisément les différentes sources relatives à l’édifice, notamment au travers de la composante spatiale permettant la localisation de chaque donnée collectée. La participation des étudiants à la réalisation et l’alimentation du modèle « intelligent » tout au long du processus les engage activement dans l’approche interdisciplinaire en les amenant à collecter et croiser les données issues des diverses études (en général dispersées au sein de plusieurs rapports, mobilisant diverses techniques, confrontant plusieurs approches du métier), à en comprendre la complémentarité et à en faire un véritable ressort du projet. Finalement, le contexte virtuel 3D développé dans l’approche permet d’analyser aisément les premières les hypothèses du projet au travers de son environnement et de l’ensemble des informations collectées. [less ▲]

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See detailWhat is the landscape of artisanal cheese production in Belgium?
Gerard, Amaury ULiege; Daube, Georges ULiege; Sindic, Marianne ULiege

Poster (2018, February 08)

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See detailNotebooks, reproducibility and other topics in ocean sciences
Troupin, Charles ULiege

Conference (2018, February 08)

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See detailEffect of cooking methodes on omega-6/omega-3 and hypo/hypercholesterolemic ratios of Bebni-Guil lamb meat from eastern Morocco
Belhaj, K.; Mansouri, F.; Sindic, Marianne ULiege et al

Conference (2018, February 08)

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See detailHolomorphic cohomological convolution and Hadamard product
Dubussy, Christophe ULiege

Conference (2018, February 06)

In his thesis, T. Pohlen succeeded in defining a Hadamard product between holo- morphic functions defined on star eligible open sets of the Riemann Sphere. We show how this theory is actually a particular ... [more ▼]

In his thesis, T. Pohlen succeeded in defining a Hadamard product between holo- morphic functions defined on star eligible open sets of the Riemann Sphere. We show how this theory is actually a particular case of the holomorphic cohomological convolution, defined in a general way thanks to the integration map on a complex Lie group. [less ▲]

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See detailIntegrated continuous flow photoreactors: Photooxidation of (L)-methionine with singlet oxygen
Emmanuel, Noémie ULiege; Mendoza Gallego, Carlos ULiege; Winter, Marc et al

Poster (2018, February 06)

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See detailTowards Understanding the Mechanical Properties of Protein Secondary Structures: A Single-Molecule Force Spectroscopy Study of Synthetic Helical Foldamers
Devaux, Floriane ULiege; Li, Xuesong; Huc, Ivan et al

Conference (2018, February 05)

For thousands of years, nature has selected and perfected the conformation foldings of its molecular machines. They are set out to fulfill the most diverse chemical or mechanical functions in nature. In ... [more ▼]

For thousands of years, nature has selected and perfected the conformation foldings of its molecular machines. They are set out to fulfill the most diverse chemical or mechanical functions in nature. In order to understand reaction pathways of such bio-molecular machines and to mimic nature’s creations using chemical syntheses, it is essential to understand the origins of molecular foldings and their influence on the mechanical properties of these machines. We specifically designed synthetic molecular models of secondary helical structures to allow us to simplify the many parameters occurring simultaneously in nature. The aim of our study is two-fold: identify the relationships between the chemical sequence of the foldamers and their (un)folding forces and mechanisms and expand the limits of Single-Molecule Force Spectroscopy (SMFS) as our model systems are much smaller than natural (bio)polymers. Here, we study the mechanochemical properties of our folded aromatic oligoamides [Huc, 2014] at the monomolecular level using SMFS with an Atomic Force Microscope. We investigated several different sizes of foldamers in solution. Each of the foldamers yielded reproducible and specific force-extension curves, showing a characteristic unfolding pattern with multiple features. The unfolding pattern was consistent with a sequential opening of entities with identical interactions. While the measured pattern lengths were directly proportional to the foldamer sizes, the average unfolding forces showed a non-linear dependence on the foldamer size. This could be retraced to cooperative effects in the foldamer sequence. Finally, compared to natural biopolymers [Ritort, 2016;, Seitz, 2001], our foldamers exhibited increased stabilities when submitted to external loads. The interactions at the origin of this observation were selectively investigated by performing a solvent study. [less ▲]

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See detailImproving the bioinformatics analysis of HTS clonality data in virus-induced leukemia
Hahaut, Vincent ULiege; Rosewick, Nicolas; Artesi, Maria ULiege et al

Poster (2018, February 02)

Proviral integration into the host genome is one of the main hallmarks of infection by oncogenic retroviruses. This event creates a life-long signature, each infected cell being characterized by a ... [more ▼]

Proviral integration into the host genome is one of the main hallmarks of infection by oncogenic retroviruses. This event creates a life-long signature, each infected cell being characterized by a specific integration site (IS). Monitoring of the clonal architecture over time (clone: population of cells sharing an identical IS) has significantly contributed to a better understanding of HIV persistence, gene therapy vector mediated treatment and deltaretrovirus-induced leukemia. Our lab recently developed an optimized high-throughput sequencing (HTS) based clonality method. It enables the identification of proviral integration sites genome-wide while simultaneously quantifying the abundance of the corresponding clones. The method is superior to any of the previously available protocols, mainly in terms of sensitivity, cost-effectiveness and hands-on time, making it suitable for routine clinical observation of infected individuals. Using this method, we recently showed that longitudinal monitoring of the dominant leukemic clone in patients infected by Human T-cell Leukemia Virus-1 (HTLV-1) better predicts therapeutic response (Artesi et al, Leukemia, 2017). We applied the method to biological samples isolated from HTLV-1 infected patients and Bovine Leukemia Virus (BLV) infected animals (bovine and sheep). This resulted in the generation of an unprecedented volume of raw sequence data. In this study we developed a novel clonality analysis pipeline that better exploits the potential of the method, improving previously published protocols. [less ▲]

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See detailExperimental investigation of a multi-evaporator refrigerator for both cabin cooling and battery thermal management
Gillet, Thomas; Andres, Emmanuelle; El-Bakkali, Amin et al

Conference (2018, February 01)

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See detailWhen splicing meets environmental challenges
Fanara, Steven ULiege; Hanikenne, Marc ULiege; Motte, Patrick ULiege

Conference (2018, February 01)

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See detailBLUU-Tramp: a new H/D exchange method to identify the protein unfolding landscape
Kay, Jennifer ULiege; Corazza, Alessandra; Dumoulin, Mireille ULiege et al

Poster (2018, February 01)

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See detailPersonal Dose Computation with the Aid of Staff Monitoring system based on 3D Depth Cameras
Abdelrahman, Mahmoud Eid Mahmoud ULiege; Vanhavere, Filip; Struelens, Lara et al

Poster (2018, February 01)

For more than 50 years, passive dosimeters have been used to assess the dose to workers occupationally exposed to ionizing radiation. Such dosimeters are designed to measure the operational quantity Hp(10 ... [more ▼]

For more than 50 years, passive dosimeters have been used to assess the dose to workers occupationally exposed to ionizing radiation. Such dosimeters are designed to measure the operational quantity Hp(10) as an estimate of the effective dose, E, which is a quantitative expression of the “radiation detriment” that cannot be measured directly. With these dosimeters, the results are mostly known only after some time, and wearing a dosimeter is often seen as a burden by some workers. Furthermore, the uncertainties associated with the present dosimeters (within a factor of 1.5 or 2 from the real value) are not negligible. In line with the current move to more real time personal dose monitoring, we are working towards an innovative approach based on computational methods to determine occupational exposures. The aim of this research is to calculate doses to workers instead of measuring them. For this, the spatial radiation field, including energy and angular distribution, needs to be known. The real movement of the persons in a given workplace can be monitored in real-time using Time-of-Flight cameras and flexible computational phantoms representing the workers anatomy can be positioned using the tracking information. Finally, all this input data should be transferred to a tool, using Monte Carlo techniques to calculate the doses to the workers. As a first step, a tool used to track a person in 3D coordinates using Microsoft® Kinect™ was developed. The tool, which is utilizing the skeleton tracking algorithm embedded in the Kinect SDK from Microsoft, is capable of correctly tracking the worker movement in real-time. A series of validation experiments were performed to test the tracking tool and the dose calculation method. An anthropomorphic phantom was positioned on a moveable table in the horizontal irradiator of the Laboratory for Nuclear Calibration (LNK) at SCK•CEN. The phantom was moved to different distances from a Cs-137 source. The position of the phantom was monitored with the Kinect™ and the coordinates recorded. The dose to the phantom was calculated using different methods: 1. Using the reference values from the calibration facility (LNK), 2. Using VISIPLAN-3D: An analytical dose assessment tool developed at SCK•CEN, 3. Using MCNPX Monte-Carlo simulations, and 4. Using InstaDose® dosimeters based on direct ion storage technology. A comparison was made between each method and results showed good agreement between the reference, the measured and the calculated dose. This experiment was repeated with different degrees of complexity of movement of the phantom. This first test proved the validity of the methodology used. [less ▲]

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See detailUnderstanding mesothelioma chemoresistance and implication of ADAM in this process
Bellefroid, Marine ULiege

Poster (2018, February 01)

Mesothelioma is an aggressive cancer that affects mesothelial surfaces. The most recognized risk factor for mesothelioma is asbestos exposure since the fibres can reach the pleura and are not cleared. The ... [more ▼]

Mesothelioma is an aggressive cancer that affects mesothelial surfaces. The most recognized risk factor for mesothelioma is asbestos exposure since the fibres can reach the pleura and are not cleared. The cancerization might arise 30 to 40 years after exposure. The gold standard treatment is a combination of cisplatin and pemetrexed. Unfortunately, the available therapies have a limited impact and cancer cells quickly develop resistance to treatment. Adamalysins constitute a family of zinc dependant proteases. Among them, ADAM (a disintegrin and metalloprotease) display a conserved structure made of various domains playing roles in cell to cell interactions, cell to extracellular matrix interactions as well as the shedding of some membrane proteins. Numerous ADAM are implicated in processes leading to cancer development such as inflammation, invasion, angiogenesis and resistance to chemotherapy. ADAM8 has been described to be implicated in cisplatin resistance in NSCLC and bladder cancers. This project aims at unveiling the mechanisms of treatment resistance induced by ADAM8 and other proteases in mesothelioma. The final goal will be the development of therapeutic strategies based on the inhibition of ADAM proteases. In human mesothelioma samples, ADAM8 mRNA are overexpressed as compared to normal pleura samples. Therefore, we hypothesized that ADAM8 was implicated in cancer development and we started to investigate it in vitro. We transfected AB12 murine mesothelioma cells with shRNA targeting ADAM8. These ADAM8-ShRNA cells treated with cisplatin displayed a decreased survival rate as compared to control-ShRNA treated cells. This indicates that ADAM8 might be implicated in cisplatin resistance. Concurrently, we have generated 2 different mesothelioma cell lines resistant to cisplatin. The first is derived from AB12 cell line and the second derives from a cell line obtained by a primary cancerization mice model (6627). Briefly, the cells have been treated with increasing doses of cisplatin from 0,25 µM to 2 µM, a dose that would kill parental cell lines. The resistance of the treated cells was assessed by a cell proliferation array in presence of cisplatin and we confirm that these cisplatin-treated cell lines display an increased resistance to the drug. In the very next future, we will perform a RNA sequencing experiment in order to compare the cisplatin-resistant cell lines to the matching parental cells in order to determine which pathways are modified and would explain how the cells resist. In conclusion, our results show that ADAM8 might be implicated in cisplatin resistance in mesothelioma. In our future researches, we will aim at discovering the molecular mechanisms of resistance to cisplatin. We hypothesize that our results will shed light on pathways differentially expressed between the parental and the resistant cell lines. By understanding the modified pathways, we hope to be able to prevent chemotherapy-resistant cells to emerge. [less ▲]

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See detailHydro-mechanical study of MAVL nuclear waste repository galleries in Callovo-Oxfordian claystone
Argilaga, Albert ULiege; Charlier, Robert ULiege; Cerfontaine, Benjamin ULiege et al

Conference (2018, February 01)

The disposal of radioactive waste in deep underground repositories has been studied for a long while (OECD/NEA, 1995). Argillaceous rocks have been found to be good candidates to host the repositories ... [more ▼]

The disposal of radioactive waste in deep underground repositories has been studied for a long while (OECD/NEA, 1995). Argillaceous rocks have been found to be good candidates to host the repositories because of their low permeability and the ability to absorb radionuclides. In France, the Callovo-Oxfordian argillite (COX) has been chosen by the national agency ANDRA to be the host rock to store the radioactive waste. During the previous years, the problem of gallery excavations in the COX host rock has been the case of study in Liège University. The problem, involving strain localization, is not well posed when modelled using classical theories; a microstructured model is proposed: local Second Gradient (Collin et al. 2006), this avoids the pathological mesh dependency by introducing an internal length that regularizes the problem. At the present time, the model takes into account several transverse anisotropies, e.g. cohesion (Pietruszczak et al. 2002), a visco-plastic model is retained to model the long term convergence, finally, a permeability evolution model allows to correlate strain localization and permeability increase (Pardoen et al. 2016). The purpose of this work is to model the long term behaviour of the MAVL galleries (100 years) with a special focus on the localisation extent, effect of ventilation, displacements and concrete stress state. Results (Figure 1) show an important effect of the supporting structure on the problem, the compressible wedges determine the localization mode by triggering the shear bands. Results also show a high sensitivity to the viscosity parameters. [less ▲]

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See detailTargeting a coagulation-EMT axis in early metastasis
Vanwynsberghe, Aline ULiege; Lambert, Justine ULiege; Francart, Marie-Emilie ULiege et al

Poster (2018, February 01)

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See detailThe knotty phenotype of the frd3 Arabidopsis mutant
Scheepers, Maxime ULiege; Spielmann, Julien ULiege; Boulanger, Madeleine ULiege et al

Poster (2018, February 01)

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See detailEarly step of BlaR1 signal transduction revealed by Single-Molecule Force Spectroscopy
Dauvin, Marjorie ULiege

Conference (2018, February 01)

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See detailLa dramaturgie goethéenne, une source théorique du Capital de Marx
Ghanbari Matin, Soheil ULiege

Conference (2018, February)

Pour l’analyse de la forme valeur de la marchandise, Marx se sert de « l’abstraction » semblablement à « des réactifs fournis par la chimie ». Ainsi, l’analyse de la marchandise révèle sa nature ... [more ▼]

Pour l’analyse de la forme valeur de la marchandise, Marx se sert de « l’abstraction » semblablement à « des réactifs fournis par la chimie ». Ainsi, l’analyse de la marchandise révèle sa nature ontologique : la contradiction entre la valeur d’usage et la valeur d’échange lui étant constitutive, la marchandise gagne à être vue comme « corporéité chimique » — extériorisation même de la contradiction d’une activité polarisée qui devient effective dans son interaction avec d’autres marchandises. Or, la transition de la forme valeur générale à la forme argent débouche sur le caractère fétiche de la marchandise et son secret : la relation entre les marchandises se substitue à la richesse des relations sociales. Partant, afin de mieux percer ce secret, le point de vue analytique du mode d’investigation se bascule en mode d’exposition synthétique et la processualité chimique cède le pas au procédé alchimique : c’est que « le capitaliste, en transformant l’argent en marchandises qui servent d’éléments matériels d’un nouveau produit, en leur incorporant (…) la force de travail vivant, transforme la valeur (…) en capital, monstre animé qui se met à travailler comme s’il avait le diable au corps ». Cette discursivité du Capital se déchiffre comme intertexte. La dernière citation emprunt et inverse un vers de Faust : « Que s’il avait l’amour au corps ». L’amour, lien véritable, se renverse en diabolus, ce qui désunit. Ce renversement étant lui-même conforme à cet autre vers exprimant l’idée de la perte du lien processuel dans le passage de l’analyse à la synthèse : « Elle se moque d’elle-même (…), elle a les parties dans sa main, il ne lui manque (…) que le lien spirituel ». En outre, Le Capital suit l’idée générale des Affinités électives, roman dans lequel Goethe analyse les relations sociales suivant un modèle chimique où l’amour et l’amitié se révèlent comme liens véritablement humaines. N’est-ce pas Le Capital qui empruntait à des œuvres théâtrales et littéraires son versant théorique avant même que celles-ci ne le lui empruntent ? [less ▲]

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See detailModel updating of a wing-engine structure with nonlinear connections
Song, Mingming; Renson, Ludovic; Noël, Jean-Philippe ULiege et al

in Proceedings of the International Modal Analysis Conference (IMAC) XXXV (2018, February)

This paper investigates the performance of a Bayesian model updating approach using nonlinear normal modes (NNMs). The proposed approach is applied to a wing-engine structure tested in the laboratory. The ... [more ▼]

This paper investigates the performance of a Bayesian model updating approach using nonlinear normal modes (NNMs). The proposed approach is applied to a wing-engine structure tested in the laboratory. The structure response to a broadband input excitation is measured experimentally. The structure NNMs are then extracted from the measured data by combining a frequency-domain nonlinear subspace identification method with numerical continuation technique. An initial finite element model of the wing-engine structure is built in Matlab and its linear stiffness parameters and the coefficients of the local nonlinearities are selected as the updating parameters. The joint posterior probability distribution of the model parameters is estimated based on their prior distribution and the likelihood function which is defined as a Gaussian distribution of error function. The error function in this study is defined as the difference between model-predicted and identified NNMs at different energy levels. The calibrated model is then used to predict the structure response (NNMs and time history), taking into account model parameters uncertainties and modeling errors. The model predictions are compared with a set of experimental results that were not used in the calibration process and only considered for validation purpose. [less ▲]

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See detailContinuous-flow preparation of γ-butyrolactone scaffolds from renewable fumaric and itaconic acids under photosensitized conditions
Gerardy, Romaric ULiege; Winter, Marc; Horn, Clemens R. et al

Poster (2018, February)

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See detailNonlinearities of an aircraft Piccolo tube: Identification and modeling
Dossogne, Tilàn ULiege; Trillet, Pierre; Schoukens, Maarten et al

in Proceedings of the International Modal Analysis Conference (IMAC) XXXV (2018, February)

Piccolo tubes are parts of aircraft wings anti-icing system and consist of titanium pipes inserted into the internal structure of the slat. Due to differential thermal expansion, clearances between the ... [more ▼]

Piccolo tubes are parts of aircraft wings anti-icing system and consist of titanium pipes inserted into the internal structure of the slat. Due to differential thermal expansion, clearances between the tube and its support are unavoidable and cause the overall system to exhibit highly nonlinear behavior, resulting from impacts and friction. This paper addresses the identi cation and modeling of the nonlinearities present in the slat-Piccolo tube connection. The complete identi cation procedure, from nonlinearity detection and characterization to parameter estimation, is carried out based upon sine-sweep measurements. The use of several techniques, such as the acceleration surface method, enables to understand the complex dynamics of the Piccolo tube and build a reliable model of its nonlinearities. In particular, the parameters of nonsmooth nonlinear stiffness and damping mechanisms are estimated. The nonlinear model is finally validated on standard quali cation tests for airborne equipments. [less ▲]

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See detailSystem identification of jointed structures: Nonlinear modal testing vs. State-space model identification
Scheel, Maren; Kleyman, Gleb; Tatar, Ali et al

in Proceedings of the International Modal Analysis Conference (IMAC) XXXV (2018, February)

Two approaches for experimental identification of the nonlinear dynamical characteristics of jointed structures are investigated, (a) Nonlinear Modal Testing, (b) State-Space Model Identification. Both ... [more ▼]

Two approaches for experimental identification of the nonlinear dynamical characteristics of jointed structures are investigated, (a) Nonlinear Modal Testing, (b) State-Space Model Identification. Both require only minimal a priori knowledge of the specimen. For method (a), the definition of nonlinear modes as periodic motions is used, in its generalized formulation recently proposed for nonconservative systems. The theoretically required negative damping compensating the frictional dissipation is experimentally realized by properly controlled excitation. This permits the extraction of modal frequencies, damping ratios and vibrational deflection shapes as a function of the vibration level. For method (b), a state-space model with multivariate polynomial nonlinear terms is identified from the vibration response to a properly designed excitation signal. Both methods are applied to a structure with bolted joints. The quality of the extracted modal and state-space models, respectively, is assessed by comparing model-based predictions of the forced vibration response to reference measurements. [less ▲]

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See detailDes indices pour la définition de l'état des masses d'eau en milieu marin, mises au point, applications et aide à la gestion
Gobert, Sylvie ULiege; Richir, Jonathan ULiege

in L’eau pour le développement La Gestion Intégrée des Ressources en Eau dans les Pays en développement (2018, February)

Comme les écosystèmes dulçaquicoles, les écosystèmes marins sont soumis à une pression humaine croissante qui altère la qualité de l’eau et les communautés aquatiques. Près de 98 pourcents de l’eau de ... [more ▼]

Comme les écosystèmes dulçaquicoles, les écosystèmes marins sont soumis à une pression humaine croissante qui altère la qualité de l’eau et les communautés aquatiques. Près de 98 pourcents de l’eau de notre planète bleue est contenue dans les océans qui constituent le réceptacle final de tout ce que nous rejetons comme déchets (volontairement ou non). Moins accessible, les océans sont méconnus, souvent oubliés ou négligés et considérés comme une zone inépuisable et où tout se dilue ; actuellement encore 80% des eaux usées sont rejetées en mer sans traitement préalable, à peine 2 % des surfaces marines sont protégées. La Méditerranée est particulière à plus d’un égard, bassin de concentration, de faible surface (1% des océans) abritant pourtant plus de 10% de la biodiversité mondiale. Cette petite mer est un modèle pour les océanographes : en mesurant ce qui s’y passe, nous pouvons prédire ce que se déroulera à court ou moyen terme dans le reste des océans. Le laboratoire d’Océanologie est activement impliqué depuis une quinzaine d’années dans la mise au point d’indice de la qualité des masses d’eau côtières. Ces indices sont construits sur base des connaissances du milieu (variations naturelles), par la mesure des niveaux de contamination et des effets (observation et contamination en mésocosme) de cette pollution sur les communautés. Nous avons développé et validé des indices biologiques (PREI : Posidonia Rapid and Easy Index, ICAR Indice Caulerpa cylindracea ; espèce envahissante), de pollution (TEPI : Trace Element Pollution Index, TESVI : Trace Element Spatial Variation Index), de qualité paysagère (LIMA LIttoral MArin) … Ces indices sont utilisés actuellement dans le cadre de la DCE (Directive Cadre Eau), la DCSMM (Directive Cadre Stratégie pour le Milieu Marin) et dans des réseaux de surveillance en Méditerranée, ils sont un relais et un moyen de communication entre les scientifiques et les politiques, les gestionnaires. L’exportation et l’apprentissage de l’utilisation de ces indices sont un atout pour une gestion globale de l’eau à l’échelle de la Méditerranée. Leurs applications sur l’ensemble de la façade méditerranéenne ont, entre autre, mis en évidence l’impact positif de l’application de directives européennes en matière de gestion des eaux par rapport aux côtes de Nord de l’Afrique. [less ▲]

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See detailAs teorias semióticas face à fotografia
Dondero, Maria Giulia ULiege

in Calavari, Suzi; Rodrigues, Angelica; Rocha, Nildicéia (Eds.) Proceedings VI SELIN – NOVAS PRÁTICAS EM PESQUISA SOBRE A LINGUAGEM: ROMPENDO FRONTEIRAS (2018, February)

Dans ce texte, je me propose de revenir sur les travaux en sémiotique qui ont marqué les études du champ interdisciplinaire de la photographie et de les poursuivre; l’objectif principal est de fournir ... [more ▼]

Dans ce texte, je me propose de revenir sur les travaux en sémiotique qui ont marqué les études du champ interdisciplinaire de la photographie et de les poursuivre; l’objectif principal est de fournir quelques pistes pour étudier, d’un point de vue sémiotique, l’image photographique en tant qu’objet pris dans des pratiques d’usage et d’interprétation diversifiées au sein des statuts sociaux de l’art, de la science, de la religion. [less ▲]

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See detailSupporting students' learning through a program focusing on formative feedback
Leduc, Laurent ULiege; Verpoorten, Dominique ULiege

Conference (2018, February)

Designed in order to support learning and success of First-Year students enrolled in the same programs at the University of Liège (Belgium), the « Feedback First-Year Project » has been successively ... [more ▼]

Designed in order to support learning and success of First-Year students enrolled in the same programs at the University of Liège (Belgium), the « Feedback First-Year Project » has been successively implemented in five different Faculties since its creation in 2013. This structured project consists in providing a customized pedagogical support - teams of advisers made of specialists in instructional sciences and content-domain experts - to the professors in charge of First-Year courses in those schools in order to discuss the opportunity to regulate or optimize some aspects of their teaching (collectively or individually), focusing on their formative feedback practices with Freshmen. [less ▲]

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See detailLocating nonlinearity in mechanical systems: A dynamic network perspective
Noël, Jean-Philippe ULiege; Schoukens, Maarten; Van den Hof, Paul

in Proceedings of the International Modal Analysis Conference (IMAC) XXXV (2018, February)

Though it is a crucial step for most identification methods in nonlinear structural dynamics, nonlinearity location is a sparsely addressed topic in the literature. In fact, locating nonlinearities in ... [more ▼]

Though it is a crucial step for most identification methods in nonlinear structural dynamics, nonlinearity location is a sparsely addressed topic in the literature. In fact, locating nonlinearities in mechanical systems turns out to be a challenging problem when treated nonparametrically, that is, without fitting a model. The present contribution takes a new look at this problem by exploiting some recent developments in the identification of dynamic networks, originating from the systems and control community. [less ▲]

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See detailSubspace-based identification of a distributed nonlinearity in time and frequency domains
Anastasio, Dario; Marchesiello, Stefano; Noël, Jean-Philippe ULiege et al

in Proceedings of the International Modal Analysis Conference (IMAC) XXXV (2018, February)

Nonlinear system identification has become of great interest during the last decades. However, a common and shared framework is not present yet, and the identification may be challenging, especially when ... [more ▼]

Nonlinear system identification has become of great interest during the last decades. However, a common and shared framework is not present yet, and the identification may be challenging, especially when real engineering structures are considered with strong nonlinearities. Subspace methods have proved to be effective when dealing with local nonlinearities, both in time domain (TNSI method) and in frequency domain (FNSI method). This study reports an improvement for both methods, as a first attempt to account for distributed nonlinearities, which is still an open question in the research community. A numerical beam under moderately large oscillations that exhibits geometric nonlinearity is considered. The object of the identification process is to exploit its behavior through the correct identification of the parameters that define the nonlinearity. Results show a high level of confidence between the two methods, and suggest that a more complete analysis of distributed nonlinear phenomena can be conducted based on these approaches. [less ▲]

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See detailLes actes notariés liégeois du XVIIe siècle : transition et sauvegarde d’une justice médiévale
Drécourt, Aurore ULiege

Conference (2018, January 31)

La justice médiévale se caractérise par une procédure orale et publique au sein de laquelle les parties sont censées être sur un pied d’égalité. Le juge n’a dès lors qu’un rôle d’arbitre, les différentes ... [more ▼]

La justice médiévale se caractérise par une procédure orale et publique au sein de laquelle les parties sont censées être sur un pied d’égalité. Le juge n’a dès lors qu’un rôle d’arbitre, les différentes preuves étant réunies par les parties en présence. Il s’agit d’une justice négociée, dont le but est de réparer le préjudice subi. Il s’agit moins de « punir » que de rétablir la paix entre les parties. Les transactions, hors de la sphère judiciaire, sont aussi très fréquentes. Progressivement, avec la montée de l’Etat et la monopolisation des pouvoirs par le Prince, la justice va se transformer. Le criminel offense le Prince en contrevenant à ses lois, en perturbant l’ordre public. Dans ce dernier cas, la procédure inquisitoire permet dès lors à un officier de justice de se charger lui-même du rassemblement des preuves et de la poursuite du criminel afin de le condamner, de le punir. Toutefois, malgré cette évolution à l’époque moderne, les transactions entre les parties, héritées de cette tradition médiévale d’une justice négociée, subsistent. Elles peuvent prendre diverses formes selon les lieux et sont préférées à la justice du fait de leur rapidité, de leur faible coût, et surtout, de leur discrétion. Elles permettent aussi de résoudre les conflits au sein d’une petite communauté : à l’échelle familiale ou encore de la paroisse, sans qu’un individu extérieur – comme le juge – ne vienne interférer. Le notaire, tout particulièrement, est l’intermédiaire idéal pour ce genre de transaction : à une époque où l’écrit a de plus en plus de poids, ces actes, à valeur authentique, constituent des preuves légales. Il n’est donc pas rare de se déplacer devant cet officier de l’autorité publique pour des affaires relevant du petit criminel. De plus, des accords pour homicides y sont également établis, malgré la poursuite publique des autorités. Nous proposons ici d’étudier les accommodements notariés liégeois du XVIIe siècle qui assurent le prolongement de cette tradition médiévale d’une justice réparatrice, dont le but est de rétablir la paix entre les parties plutôt que de punir le criminel. [less ▲]

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See detailLe dernier acte de fidelitas d’un familier des Médicis dans la Rome de Paul III : Baldassarre Turini comme superviseur des tombes de Léon X et Clément VII
Trizzullo, Eva ULiege

Conference (2018, January 31)

Alors que les Médicis perdent leur hégémonie sur la ville de Rome après l’élection de Paul III Farnèse le 13 octobre 1534, un chantier intimement lié à la famille florentine est au cœur de toutes les ... [more ▼]

Alors que les Médicis perdent leur hégémonie sur la ville de Rome après l’élection de Paul III Farnèse le 13 octobre 1534, un chantier intimement lié à la famille florentine est au cœur de toutes les attentions : les tombes de Léon X et Clément VII en l’église de Santa Maria sopra Minerva. Cette commande, entamée sous Clément VII et achevée du vivant de Paul III, compte parmi les projets sculptés les plus ambitieux mis en œuvre depuis le sac de la ville en 1527. En plus de transcender les pontificats, le processus de création de cet ensemble est marqué par d’incessantes mutations : le projet est plusieurs fois modifié et les artistes se succèdent jusqu’à la fin du chantier en 1542. Malgré ces vicissitudes, une personnalité incontournable assure la supervision et la cohésion de cette entreprise et, par là même, la continuité avec l’âge d’or médicéen : Baldassarre Turini, dataire apostolique et homme de confiance des pontifes toscans. Cet influent prélat s’est distingué, sa vie durant, par sa fidélité constante envers les Médicis, ceux-ci n’hésitant pas à faire appel à son expertise à l’occasion de grandes commandes artistiques. Mais dans la Rome farnésienne du milieu du XVIe siècle, comment Turini a-t-il mis à profit ses multiples contacts au sein du réseau culturel toscan afin d’accomplir son ultime devoir de mémoire envers ses deux plus illustres protecteurs ? La présente communication aura pour but de comprendre l'importance de ce personnage dans le processus de création des tombes en recourant pour cela aux nombreuses sources épistolaires qui documentent ce chantier. [less ▲]

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See detailLe madrigal des anciens Pays-Bas méridionaux : un laboratoire de la transition entre prima pratica et seconda pratica ?
Degroote, Frédéric ULiege

Conference (2018, January 30)

Dans l’Italie du XVIe siècle, le genre polyphonique profane appelé « madrigal » gagne au fil des décennies une popularité croissante. Dans un premier temps, son succès doit beaucoup aux oltremontani ... [more ▼]

Dans l’Italie du XVIe siècle, le genre polyphonique profane appelé « madrigal » gagne au fil des décennies une popularité croissante. Dans un premier temps, son succès doit beaucoup aux oltremontani émigrés en Italie tels Jacques Arcadelt, Adrian Willaert ou Cipriano De Rore. Le madrigal devient ensuite un véritable laboratoire musical et poétique, essentiellement italien, ouvert aux expérimentations les plus maniéristes auxquelles s’adonnent Luca Marenzio, Carlo Gesualdo et Claudio Monteverdi. A partir des années 1550, un nouveau centre du madrigal prend progressivement place dans le Nord, et plus particulièrement à Anvers où les rééditions de compositeurs italiens côtoient une production plus locale. Les imprimeurs Pierre Phalèse et Jean Bellère remportent en particulier un certain succès en publiant plusieurs anthologies de madrigaux mêlant compositeurs italiens et locaux et dédiant ensuite des publications individuelles à des compositeurs autochtones parmi lesquels figurent Jean de Turnhout, Jean Desquesnes ou Cornelis Verdonck. Pour appréhender le phénomène du déclin de la polyphonie au profit de la monodie - qui gagne nos régions certes moins vite que l’Italie - le madrigal offre quelques clés de compréhension. A travers quelques exemples, il s’agira lors de cette communication d’investiguer le corpus madrigalesque du Nord comme laboratoire de la transition entre la prima pratica et la seconda pratica. A la lumière de cette analyse, il conviendra aussi d’interroger le postulat – encore vivace – hérité d’Alfred Einstein selon lequel la production madrigalesque des musiciens flamands après Cipriano de Rore et Roland de Lassus revêt un caractère archaïsant. Cette communication sera donc l’occasion d’une première réévaluation des transferts et des échanges que le genre a engendré sous la plume des compositeurs issus des anciens Pays-Bas. [less ▲]

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See detailIntroduction aux rencontres doctorales UR Transitions
Piront, Julie ULiege

Conference (2018, January 30)

Rencontres doctorales de l'UR Transitions, organisées en partenariat avec les laboratoires français TRAME (U. Amiens) et le CESR (U. Tours), sur le thème « Transition(s) : concept, méthodes et études de ... [more ▼]

Rencontres doctorales de l'UR Transitions, organisées en partenariat avec les laboratoires français TRAME (U. Amiens) et le CESR (U. Tours), sur le thème « Transition(s) : concept, méthodes et études de cas (XIVe-XVIIe siècles) ». En manifestant leur volonté de s’interroger sur cette notion, les doctorants et les doctorantes de Transitions souhaitent apporter leur contribution aux questionnements méthodologiques actuels, communs à nos disciplines qui se penchent sur les traces textuelles, iconographiques, musicales et matérielles du passé. Visant à dépasser les clivages hérités de la tradition historiographique, une démarche réflexive sur les outils de lecture et de compréhension du passé est à l’œuvre au sein de nos disciplines. Cette déconstruction des outils invite à en créer d’autres. Ainsi de nouveaux concepts émergent, parmi lesquels celui de « transition » (au singulier comme au pluriel). Pour la période chronologique qui nous occupe (du XIVe au XVIIe siècle), ces questions ont des répercussions évidentes quant à la méthodologie et à l’approche mise en œuvre dans nos travaux. L’équipe organisatrice a voulu réunir autour de ces questions des doctorantes et doctorants, issus de diverses disciplines et d’universités belge et étrangères. Cette approche à la fois interdisciplinaire et internationale a pour objectif de confronter les pratiques de recherche, d’encourager les collaborations inédites et de partager des résultats, trois objectifs poursuivis par notre Unité de recherches. [less ▲]

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See detailCore Content Classification in General Practice/Family Medicine (3CGP). À New indexing system for General Practice Knowledge management
Jamoulle, Marc ULiege; de Oliveira Tavares, Ariana; Medeiros, Suzanna et al

Conference (2018, January 27)

Background : Sharing the results of research with General Practitioners (GPs) is crucial for the survival of the discipline of General Practice / Family Medicine (GP/FM). Usual indexation systems like ... [more ▼]

Background : Sharing the results of research with General Practitioners (GPs) is crucial for the survival of the discipline of General Practice / Family Medicine (GP/FM). Usual indexation systems like MeSH are not multilingual nor adapted to the particular field of GP/FM. Consequently, the GP/FM abstracts are lacking bibliographic control and more than half of the research presented by GPs at congresses is lost. We propose a new multilingual indexing system. The existing International Classification of Primary Care (ICPC) has now been expanded with a taxonomy related to contextual aspects (called Q-Codes) such as education, research, practice organization, ethics or policy in GP/FM, currently not captured. The set is proposed under the name Core Content Classification in General Practice (3CGP). Aim :The aim is to facilitate indexing of GP/FM specific scientific work and to improve performance in information storage and retrieval for research purposes in this field. Research Method/Procedure: Using qualitative analysis, a corpus of 1,702 abstracts from six GP/FM-related European congresses was analyzed to identify main themes discussed by GPs, handled in a domain-specific taxonomy called Q-Codes and translated in 8 languages. In addition, a methodology for building a lightweight ontology (in OWL-2) was applied to Q-Codes, adding object and datatype properties to the hierarchical relations, including mapping to the MeSH thesaurus, Babelnet (www.babelnet.org) and Dbpedia. Finally, the ICPC-2 in 19 languages and Q-Codes in 8 languages have been integrated in a healthcare terminology service (www.hetop.eu/q) with a companion website (http://3cgp.docpatient.net) Anticipated Results of the Research: Through better indexing of the grey literature (congress abstracts, master's and doctoral thesis), we hope to enhance the accessibility of research results of GP/FM domain and promote the emergence of networks of researchers. First result of experimental implementations of the new indexing system will be presented. The Brazilian congress of family and community medicine 2017 has been entirely coded by participants with ICPC and Q-Codes and 1746 accepted and coded abstracts are ready to be analyzed and will be discussed . In Portugal 300 master theses have been coded with Q Codes and the result will be also presented and discussed. [less ▲]

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See detailCirculations et savoirs : une histoire
Henneau, Marie-Elisabeth ULiege; Dana, Madalena; Cabanel, Anna

Conference (2018, January 27)

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See detailRole of ADAM proteases in mesothelioma chemoresistance
Bellefroid, Marine ULiege

Poster (2018, January 27)

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See detailEMT-induced TF as a targetable pathway in early metastasis
Vanwynsberghe, Aline ULiege; Lambert, Justine ULiege; Francart, Marie-Emilie ULiege et al

Conference (2018, January 27)

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See detailLes arts situés. Une alternative à la notion d'artification?
Havelange, Carl ULiege

Conference (2018, January 26)

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See detailPanorama de l'édition juridique en Belgique francophone
Desseilles, François ULiege

Conference (2018, January 26)

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See detailAprès les attentats. Discours de savoir et action citoyenne dans les carnets de recherche en ligne
Mayeur, Ingrid ULiege

Conference (2018, January 26)

La présente proposition souhaite étudier comment certains carnets de recherche en sciences humaines et sociales, hébergés sur la plateforme Hypothèses, peuvent constituer le lieu d’une interrogation ... [more ▼]

La présente proposition souhaite étudier comment certains carnets de recherche en sciences humaines et sociales, hébergés sur la plateforme Hypothèses, peuvent constituer le lieu d’une interrogation citoyenne et d’un dialogue entre les chercheurs et la société civile. Hypothèses, comme médium organisant la communication scientifique, se distingue d’autres modes de diffusion de la recherche (articles en revues, monographies) en ce qu’il favorise une prise de parole régulière et brève, en lien direct avec l’actualité – celle du chercheur, d’un secteur de recherche, d’un média de la recherche, ou encore plus largement d’une actualité sociale. Dispositif de science ouverte, laissant libre accès aux écrits scientifiques, Hypothèses autorise aussi l’élargissement de son lectorat : la présence d’un éventuel public extra-académique est ainsi prise en compte dans les discours d’accompagnement de la plateforme, tout comme au sein de carnets explicitement dédiés à la vulgarisation (on citera, par exemple, le magazine Monde Sociaux). À travers l’analyse comparative de deux carnets au sein desquels des chercheurs, à titre individuel ou collectif, traitent l’après des attentats de Paris survenus en janvier et novembre 2015 , il s’agira de déterminer comment l’actualité est construite comme référent de la recherche, tant d’un point de vue sémiotique (organisation interne du carnet, énonciation éditoriale et visuelle, plurisémioticité etc.) que discursif (ethos, subjectivité, figures, etc.). Plus précisément, je m’attacherai à répondre aux questions suivantes : Comment les chercheurs se présentent-ils au sein de ces carnets, qui s’inscrivent aussi bien dans une démarche de recherche que dans l’éclairage d’une actualité sociale ? Quelle image de l’allocutaire construisent-ils, et comment invitent-ils celui-ci à s’approprier les contenus diffusés ? Enfin, comment qualifier cette entreprise particulière de transmission des connaissances entre les chercheurs et le public profane ? [less ▲]

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See detailUtilisation de l'imagerie hyperspectrale proche infrarouge dans l'étude de systèmes racinaires
Eylenbosch, Damien ULiege; Fernández Pierna, Juan Antonio; Baeten, Vincent et al

Conference (2018, January 25)

Lors d’études de systèmes racinaires sur base de prélèvements de carottes de sol, le tri manuel des racines et des résidus de cultures, récupérés après le lavage des échantillons, afin de les quantifier ... [more ▼]

Lors d’études de systèmes racinaires sur base de prélèvements de carottes de sol, le tri manuel des racines et des résidus de cultures, récupérés après le lavage des échantillons, afin de les quantifier, est une étape fastidieuse. Pour faciliter et accélérer cette étape, nous avons mis au point une méthode de discrimination de ces éléments sur base d’images prises en proche infrarouge. Les échantillons lavés et séchés sont passés sous une caméra qui enregistre, pour chaque pixel de l’image, un spectre en proche infrarouge. Ces spectres sont liés à la nature physico-chimique des éléments présents sur l’image et ils sont analysés à l’aide d’algorithmes d’analyses discriminantes qui permettent de les classer et donc de prédire la nature de chaque pixel de l’image. Sur base du nombre de pixels prédits comme étant des racines ou des résidus de culture, et grâce à des droites de régression reliant le nombre de pixels prédits pour ces éléments à une masse connue, nous pouvons finalement quantifier ces éléments au sein d’échantillons de sol. Cette méthode a été testée avec succès en froment et a permis de mettre très clairement en évidence l’effet du travail du sol sur le développement du système racinaire. Elle a également été utilisée sur des échantillons de sol prélevés sous des cultures associées de froment et de pois afin de distinguer et quantifier les racines des 2 espèces et les nodosités. [less ▲]

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See detailArtification de l'industrie culturelle et culture populaire
Moreau, Timothée ULiege

Conference (2018, January 25)

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