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See detailActivational and organizational disruption of folliculogenesis and estrous cycle caused by exposure to Bisphenol A (BPA) during early postnatal or adult life
Lopez Rodriguez, David ULg; Franssen, Delphine ULg; GERARD, Arlette ULg et al

Conference (2017, May 05)

Our previous studies have shown that an early postnatal exposure to a very low dose of bisphenol A (BPA) disrupts sexual maturation and pubertal timing. However, the long-term effects of such low dose ... [more ▼]

Our previous studies have shown that an early postnatal exposure to a very low dose of bisphenol A (BPA) disrupts sexual maturation and pubertal timing. However, the long-term effects of such low dose exposure as well as the effects of adult exposure have not been studied. One day-old and 90 day-old female rats received daily subcutaneous injections of corn oil (vehicle) or BPA (25ng/kg/d or 5mg/kg/d) for 15 days. The early postnatal exposure to both BPA doses significantly decreased the percentage of females with a regular cycle (BPA-25ng: 51±15%; BPA-5mg: 7±7%; OIL: 86±2%). The estrus cycle alterations were characterized by a decrease in time spent in proestrus (BPA-25ng: 13±3%; BPA-5mg: 12±3%; OIL: 18±3%). During adult exposure, both doses caused a disruption of the estrous cycle characterized by a significant decrease in the average time spent in proestrus (BPA-25ng: 19±2%; BPA-5mg: 17±1%; OIL: 23±1%). This effect was transient as the exposed females showed a regular cycle one month after the last dose of BPA. After adult exposure, we also observed a disruption of folliculogenesis characterized by a significant decrease of antral follicles (BPA-25ng: 21±2%; BPA-5mg: 21±2%; OIL: 36±2%) and increase of atretic follicles (BPA-25ng: 24±4%; BPA-5mg: 26±6%; OIL: 15±1%). GnRH secretion measured ex vivo 24h after adult exposure was moderately affected by BPA. Indeed, GnRH interpulse interval was significantly different when comparing animals exposed to the high or low dose of BPA but not when comparingexposed animals to the control group (BPA-25ng: 42.6±0.5; BPA-5mg: 40.2±0.6%; OIL: 41.1±0,2minutes±SEM). In conclusion, while exposure to BPA produces persistent alterations of the estrous cycle after early postnatal exposure, exposure during adulthood appears to cause activational non-persistent alternations of both the estrous cycle and folliculogenesis. [less ▲]

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See detailObjets directs en kirundi
Tuyubahe, Pascal ULg

Conference (2017, May 05)

Detailed reference viewed: 16 (4 ULg)
See detailThe use of stable isotopes in marine animal trophic ecology
Sturaro, Nicolas ULg; Lepoint, Gilles ULg; Frederich, Bruno ULg et al

Conference (2017, May 05)

Stable isotope analysis has been recognised as a useful tool for studying animal diet, identifying trophic relationships, and delineating food web structures as well as their alteration by human ... [more ▼]

Stable isotope analysis has been recognised as a useful tool for studying animal diet, identifying trophic relationships, and delineating food web structures as well as their alteration by human activities. Over the past decade, the number of studies using stable isotopes of carbon and nitrogen in marine trophic ecology has increased rapidly as technological advancements greatly facilitate their use. This tool is now among the most popular in ecology and several fields of investigations have developed, including the extension of analyses to more ‘difficult’ stable isotope ratio measurements such as sulfur, the use of isotope mixing models, and the creation of compound-specific stable isotope analysis. Here, we present three case studies taken from our own investigations and previously published literature. The first investigates seagrass detritus ecosystem in which the coexistence of a rich number of species of crustacean raises the question of whether trophic diversity exist among these species. The second examines the feeding habits of coral reef fish and explores whether habitat choice on the reef and their behaviour emerges as good predictors of diet. The third presents the potential use of stable isotope analysis in studying the nutrition of scleractinian corals, which are complex symbiotic organisms that usually present both autotrophic and heterotrophic pathways. This tool has enhanced our understanding of coral species biology, yet it remains underused. Overall, we aim to provide initial insights into stable isotope analysis for illustrating their utility and potential applications to better understand food web structures and species diet in the waters around Taiwan. [less ▲]

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See detailTo be plastic is fantastic: delineate coral species niches for assessing their tolerance to changes
Denis, Vianney; Sturaro, Nicolas ULg; Yang, Shan-Hua et al

Conference (2017, May 05)

Climatic and anthropogenic disturbances alter coral reefs by reconfiguring existing coral assemblages. Surviving species are selected by the new environment based on particular traits that they may ... [more ▼]

Climatic and anthropogenic disturbances alter coral reefs by reconfiguring existing coral assemblages. Surviving species are selected by the new environment based on particular traits that they may exhibit, with the plasticity in traits defining ecological strategies associated with contrasting degrees of tolerance to changes. In this process, specialists are expected to tolerate few changes to the environmental conditions and are restricted to specific habitat, while generalists can cope with a wider range of environmental conditions by readjusting traits according to the habitat’s features. Ecological strategies in corals have been exclusively defined according to species’ trait averages, irrespective of individual variations. Challenges representing the acquisition and use of energy have also tended to be oversimplified, specifically by the choice of easy traits in the absence of strong scientific evidence. In this study, we propose a re-examination of strategies in scleractinian corals by focusing on the intraspecific variation of traits. We will investigate how the characteristics of a given species niche can help coral species to tolerate changes. Our multidisciplinary approach will focus on three major characteristics of the coral holobiont (its physiology, trophic ecology, and associated microbiome) which together can define the ecological plasticity of species. This work is of tremendous importance for enhancing the understanding of coral response to environmental changes and for ensuring functions as well as the services of this ecosystem to future generations. [less ▲]

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See detailHow microbes network (and are networked) in geological disposal research: a sociological perspective
Van Oudheusden, Michiel ULg; Schröder, Jantine; Turcanu, Catrinel

Conference (2017, May 05)

In MIND subtask 3.2, we ascertain whether and how microbes, microbiologists, and microbiology are enrolled into research on the geological disposal of radioactive waste. We adopt a social studies of ... [more ▼]

In MIND subtask 3.2, we ascertain whether and how microbes, microbiologists, and microbiology are enrolled into research on the geological disposal of radioactive waste. We adopt a social studies of science (actor-network theory) perspective that observes how actors within MIND (e.g. MIND researchers, members of the MIND Implementer Review Board) and outside the project (e.g. geologists, waste management regulators, policy makers) process data and generate insights on the role of microbes in waste disposal, and how these processes elicit challenges and opportunities for enrolment. Examples of the latter include mixed appreciations of the impact of microbial activity on artificial barriers (e.g. negligible vs. substantial), the scope for, and appeal of, institutional uptake of microbiology research (e.g. through the coupling of microbiology research to “the safety case”), and the (re)drawing of disciplinary boundaries (e.g. between microbiology and geology). Drawing on these and related examples, we explore how through projects like MIND, microbes network, and are networked, differently for the joint purpose of radioactive waste disposal. [less ▲]

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See detailFunctional emulsion-templated macroporous polymers via controlled radical polymerization
Mathieu, Kevin ULg; Jérôme, Christine ULg; Debuigne, Antoine ULg

Conference (2017, May 05)

Macroporous polymer monoliths with interconnected structures have attracted considerable interest in the fields of supported catalysis, chromatography, water purification, etc. A popular and ... [more ▼]

Macroporous polymer monoliths with interconnected structures have attracted considerable interest in the fields of supported catalysis, chromatography, water purification, etc. A popular and straightforward synthesis approach for such open-cell polymers is based on the emulsion-templated polymerization. In this strategy, a major phase is dispersed in a minor continuous phase containing monomers, cross-linker, initiator and surfactant. The curing of the continuous phase followed by the removal of the dispersed phase leads to a monolith with voids interconnected by pores. Size and number of the latters are influenced by several parameters and especially by the nature of the surfactant. Consequently, we prepared by controlled radical polymerization a series of well-defined amphiphilic copolymers having different hydrophilic-lipophilic balance (HLB) and chain-ends, used it as stabilizers for the emulsion-templated polymerizations and demonstrated the crucial effect of the macromolecular features as well as the concentration on the foam morphology. Secondly, the physical and the chemical anchoring of the macromolecular surfactants at the surface of the pores were also considered for tuning the surface properties of the porous monoliths in one step. This strategy was also implemented with alkyne-terminated copolymers in order to decorate the surface of the cavities with “clickable” moieties which broadens the scope of functional macroporous polymers. [less ▲]

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See detailControlled synthesis of α-olefins-based copolymers by organocobalt(III) complexes
Demarteau, Jérémy ULg; Debuigne, Antoine ULg; Detrembleur, Christophe ULg

Conference (2017, May 04)

Polyolefins, and ethylene-vinyl acetate (EVA) copolymers in particular, are highly attractive materials that are industrially synthesized by a free radical process for large range of applications from ... [more ▼]

Polyolefins, and ethylene-vinyl acetate (EVA) copolymers in particular, are highly attractive materials that are industrially synthesized by a free radical process for large range of applications from food packaging to coatings. Their production requires drastic synthesis conditions (high pressure and high temperature) and the resulting polymers are generally ill-defined. Controlling the polymerization of these unconjugated monomers remains however extremely difficult because of the lack of stabilizing group on their double bond. Moreover, the preparation of chain-end functionalized polyolefins is actually impossible under these conditions. This communication aims at reporting an efficient platform for the precision design of alpha-olefin-based copolymers through a controlled radical polymerization technique called Cobalt-Mediated Radical Polymerization (CMRP). The latter is based on the reversible deactivation of the radical chains by a cobalt complex bearing acetylacetonate (acac) ligands, which is very efficient under mild experimental conditions. The presentation will focus on three main axes: (i) the synthesis of a novel organocobalt(III) complex useful for the functionalization of the polymer chains, (ii) the preparation of various EVA architectures, (iii) the controlled copolymerization of vinyl acetate with a perfluorinated alkene, i.e. perfluorohexylethylene. The hydrolysis of the pendent esters moieties of these fluorinated copolymers paved the way to their polyvinylalcohol counterparts with a marked amphiphilicity. [less ▲]

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See detailEnsuring consistency of tools dedicated to biodiversity and ecosystem services : case studies
Pécheur, Emilie ULg; Maebe, Laura ULg; Piqueray, Julien

Conference (2017, May 04)

Public awareness regarding key issues of biodiversity and ecosystem services gave rise to several policies aiming at their consideration in human activities. These policies led to a bunch of legal ... [more ▼]

Public awareness regarding key issues of biodiversity and ecosystem services gave rise to several policies aiming at their consideration in human activities. These policies led to a bunch of legal constraints and incentives that are as many tools to preserve and restore both biodiversity and ecosystem services. However, these tools are often activated in a punctual way, following private initiatives or opportunities and without much reflection about the stakes beyond the actors’ own interests. This results in scattered actions, a lack of cohesion in land planning and sometimes conflicts between stakeholders. Yet biodiversity and ecosystem services need a collaborative management, beyond the individualist approach, to ensure the success and continuity of launched projects. Two case studies illustrate the collaborative and structured application of diverse tools by and for a variety of stakeholders willing to respond to specific needs. The first case is biodiversity-oriented, as it concerns the conservation of Bromus grossus, a plant species listed in Annex II of the Natura 2000 “Habitat” directive, which only grows in agroecosystems. The second case study worked on land multi-functionality in three Walloon municipalities, using ecosystem services as a tool for a land consolidation plan. These two examples highlight: 1° the key actors for the launching and cohesion of the projects, 2° the strengthening steps for short and mid-term success and 3° some conflicting elements interfering with coherent development plans. [less ▲]

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See detailUnusually high sea ice cover influences resource use by benthic invertebrates in coastal Antarctica
Michel, Loïc ULg; Dubois, Philippe; Eleaume, Marc et al

Conference (2017, May 04)

Antarctica currently undergoes strong and contrasted impacts linked with climate change. While the West Antarctic Peninsula is one of the most rapidly warming regions in the world, resulting in sea ice ... [more ▼]

Antarctica currently undergoes strong and contrasted impacts linked with climate change. While the West Antarctic Peninsula is one of the most rapidly warming regions in the world, resulting in sea ice cover decrease, the sea ice cover of East Antarctica unexpectedly tends to increase, possibly in relation with changes in atmospheric circulation. Changes in sea ice cover are likely to influence benthic food web structure through modifications of benthic-pelagic coupling, disruption of benthic production and/or modifications of benthic community structure (i.e. resource availability for benthic consumers). Here, we studied shallow (0-20 m) benthic food web structure on the coasts of Petrels Island (Adélie Land, East Antarctica) during an event of unusually high spatial and temporal (two successive austral summers without seasonal break-up) sea ice cover. Using stable isotope ratios of C and N and the SIAR mixing model, we examined importance of 4 organic matter sources (benthic macroalgae, benthic biofilm, sympagic algae, suspended particulate organic matter) for nutrition of dominant primary consumers and omnivores. 14 invertebrate taxa including sessile and mobile polychaetes, gastropods, bivalves, sea stars, sea urchins and sea cucumbers were studied. Our results indicate that most benthic invertebrates predominantly relied on sympagic algae. Despite its very high abundance, trophic role of benthic biofilm seemed limited. However, interpretation of data was complicated by the peculiar ecophysiological features of Antarctic invertebrates, whose very low metabolic rates could be associated to low isotopic turnover and long time to reach isotopic equilibrium with their food items. Resource use by consumers from Adélie Land markedly differed from literature data about invertebrate diet in coastal Antarctica, suggesting 1) important influence of increased sea ice cover on benthic food web structure and 2) high spatial and/or temporal variation in the feeding habits of studied organisms, likely linked with a high degree of trophic plasticity. Our results provide insights about how Antarctic benthic consumers, which have evolved in an extremely stable environment, might adapt their feeding habits in response to sudden man-driven changes in environmental conditions and trophic resource availability. [less ▲]

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See detailVrai, faux, non-fictif : l’essai comme saisie des mondes contemporains
Claisse, Frédéric ULg

Conference (2017, May 04)

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See detailMontenegrin ponds and lakes under threat: multiple stressors caused large-scale amphibian decline
Denoël, Mathieu ULg; Kalezić, Miloš; Džukić, Georg et al

Conference (2017, May 03)

Detailed reference viewed: 24 (1 ULg)
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See detailPenser l’anticipation par le discours social. Variations sur le radium
Stienon, Valérie ULg

Conference (2017, May 03)

Une véritable fureur du radium s’empare du premier tiers du XXe siècle, sur une période allant de la découverte des rayons X par Röntgen en 1895, de la radioactivité par Becquerel en 1896 puis du radium ... [more ▼]

Une véritable fureur du radium s’empare du premier tiers du XXe siècle, sur une période allant de la découverte des rayons X par Röntgen en 1895, de la radioactivité par Becquerel en 1896 puis du radium par le couple Curie en 1898, jusqu’à la mort de Marie Curie en 1934. Le radium constitue un cas intéressant pour interroger les possibles de la science, l’extension de l’imaginaire social par ses applications au quotidien et ses modalités de mise en récit entre réalité, croyance et fiction. À travers un large corpus d'articles de presse (articles scientifiques, romans-feuilletons, publicités, petites annonces, blagues illustrées) et de romans (aventure, fantastique, espionnage), la communication propose une approche contextuelle et médiatique du récit d'anticipation. La réflexion doit permettre de réévaluer des cadres de réception de l'anticipation souvent limités à l’alternative entre prophétisme du texte supposé visionnaire et obsolescence de la thématique non advenue ou passée de mode. [less ▲]

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See detailOPTIBRI Opening and Project Overview
Habraken, Anne ULg; Duchene, Laurent ULg; Bouffioux, Chantal ULg et al

Conference (2017, May 03)

presentation of genesis of the project, his goal and objectives, the partnership, the task flowchart and main achievements

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See detailCharacterization of Fatigue Behaviour, from Material Science to Civil Engineering Applications
Bouffioux, Chantal ULg; Habraken, Anne ULg; Duchene, Laurent ULg et al

Conference (2017, May 03)

Method used to characterise and numerically study the fatigue behaviour of HSS welded plates

Detailed reference viewed: 23 (3 ULg)
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See detailChallenges of CO2 capture as an application of fluid separation techniques
Léonard, Grégoire ULg

Conference (2017, May)

The presentation offers a review of CO2 capture technologies presented as an application of fluid separation. CO2 capture processes (Post-combustion, pre-combustion, oxyfuel combustion and industrial ... [more ▼]

The presentation offers a review of CO2 capture technologies presented as an application of fluid separation. CO2 capture processes (Post-combustion, pre-combustion, oxyfuel combustion and industrial processes) and CO2 capture methods (absorption, adsorption, membranes...) are described, and illustrated by industrial examples of these technologies. Techno-economic challenges faced by these technologies are also mentionned, and perspectives for future developments are discussed. [less ▲]

Detailed reference viewed: 31 (1 ULg)
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See detailWork environment and work-to-family conflict: Mediating role of work investment.
Babic, Audrey ULg; Stinglhamber, Florence; Barbier, Marie ULg et al

Conference (2017, May)

Detailed reference viewed: 21 (4 ULg)
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See detailEvaluation of the implementation of integrated care for people with chronic conditions
Van Durme, Thérèse; Anthierens, Sibyl; Van Hecke, Ann et al

Conference (2017, May)

Detailed reference viewed: 24 (5 ULg)
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See detailNon-Invasive Analysis of Mural Painting from a Late-Republican House (1st century B.C.) in Ostia
Strivay, David ULg; Herens, Elodie ULg; Morard, Thomas ULg et al

Conference (2017, May)

This paper is a comprehensive analytical study of the murals belonging to an ancient Roman house through the characterization of materials. The project focuses on the wall paintings of the Domus dei ... [more ▼]

This paper is a comprehensive analytical study of the murals belonging to an ancient Roman house through the characterization of materials. The project focuses on the wall paintings of the Domus dei bucranes, a house of the end of the Republican era discovered on the site of the Schola of Trajan in Ostia. This Domus has undergone several phases of development in the 1st century BC before being destroyed around 20 BC. A new house was immediately rebuilt after a major change from the ground, which allowed exceptional preservation of the decoration system. The results complement our knowledge of Roman painting techniques during the 1st century BC and also provide a comprehensive multidisciplinary approach to the problem of conservation of wall paintings. These two related objectives have been studied using non-destructive testing methods (MA-XRF, FTIR and Raman spectroscopy). The analyzes have been performed in situ using our mobile systems. The different set-ups had to be modified in order to be able to work on horizontal surfaces, specially our XRF scanner. The study of the pictorial layers address various issues in the field of archaeology: what technique has been implemented? Does the same technique was used in both phases of the development of Domus? Do they correspond to the techniques described by ancient writers? These responses are compared to those observed in other sets of murals dating from the 1st century BC. [less ▲]

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See detailIsomeric species detection of base oil hydrocarbons by photo ionization GC×GC-HRTOF-MS
Giri, Anupam ULg; Courtiade, M; Racaud, A et al

Conference (2017, May)

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See detailIdentifying novel biomarkers for the rapid diagnosis of invasive aspergillosis using GC×GC-TOFMS
Stefanuto, Pierre-Hugues ULg; Rees, Christiaan A.; Beattie, Sarah R. et al

Conference (2017, May)

Aspergillus fumigatus is a filamentous fungus responsible for the life-threatening infection, invasive aspergillosis (IA), in immunocompromised individuals. Currently, IA diagnostic methods take days to ... [more ▼]

Aspergillus fumigatus is a filamentous fungus responsible for the life-threatening infection, invasive aspergillosis (IA), in immunocompromised individuals. Currently, IA diagnostic methods take days to produce a result and methods to obtain samples are invasive. One approach to improve the time-to-diagnosis is based on utilizing our knowledge of fungal metabolism during pathogenesis. Recent studies have demonstrated the importance of oxygen availability during IA, which presents a potential diagnostic opportunity. In this study, we analyzed the early (1 hr) and late (8 hr) volatile profile of A. fumigatus strain CEA1o under oxygen replete (~20% O2) and deplete (0.2% O2) conditions. In order to comprehensively screen the headspace of these cultures, we applied headspace solid phase microextraction (HS-SPME) associated with comprehensive two-dimensional gas chromatography coupled to time of flight mass spectrometry (GC×GC-TOFMS). Comparing the headspace of the four culture conditions, we were able to identify specific volatile biomarkers of low oxygen fungal growth: ethanol, acetaldehyde, 2-propanol, 2,3-butanedione, and 3-hydroxy-2-butanone. Based on the putative identifications of these compounds, we identified potential metabolic pathways that are responsible for their production. The two first compounds are known to be produced during hypoxia metabolism of glucose, however, the three others suggest that previously uncharacterized metabolic pathways may be utilized by A. fumigatus in low oxygen conditions. Validation of these biomarker identities and translation into patients may generate metabolic insight into these organisms during IA pathogenesis. [less ▲]

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See detailPerceived management commitment to safety and safety behaviors: the moderating role of trust and support
Laurent, Julie ULg; Chmiel, Nik; Hansez, Isabelle ULg

Conference (2017, May)

Instrumental processes, based on the idea that individual perceptions of safety climate inform behavior outcomes expectancies (Zohar, 2008), and reciprocation processes, based on social exchange theory ... [more ▼]

Instrumental processes, based on the idea that individual perceptions of safety climate inform behavior outcomes expectancies (Zohar, 2008), and reciprocation processes, based on social exchange theory (Blau, 1964), have been identified as important processes to take into account in order to understand safety behaviors (Chmiel & Hansez, 2016). The main aim of this study is to go further in the explanation of the processes linking perceived management commitment to safety (PMCS) to safety behaviors, by testing the moderating role of two variables reflecting the way workers perceive their supervisor: safety specific trust in the supervisor, illustrating instrumental processes and perceived supervisor support (PSS), illustrating reciprocation processes. In two samples, a survey methodology and Latent Moderated Structural (LMS) equation modelling were used to test our hypotheses. Overall, and although results were mixed and discussed, high PMCS, when combined with high trust or high PSS, resulted in safer behaviors. We did not find such significant effects as explaining routine violations. The patterns of results were similar in the two samples. The main limitations are the use of single-source and self-reported data may lead to common-method variance bias and the cross-sectional nature of the study. Future longitudinal research is needed to test causality. An important implication for companies is to be aware of the powerful role played by management: building trusting relationship (by behaving consistently regarding safety) and encouraging managers to show support to their employees in a context where safety is considered as important are keys to potentially achieve safe behaviors. [less ▲]

Detailed reference viewed: 55 (6 ULg)
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See detailCaryl Phillips's Crossing the River and the Chorus of Archival Memory
Ledent, Bénédicte ULg

Conference (2017, May)

Caryl Phillips’s Crossing the River (1993) has been extensively analysed by critics. While the novel has given rise to a number of readings, a constant in the various existing interpretations is that it ... [more ▼]

Caryl Phillips’s Crossing the River (1993) has been extensively analysed by critics. While the novel has given rise to a number of readings, a constant in the various existing interpretations is that it invites the reader to listen to unheard voices from the past, that of the African father who sold his offspring into slavery and those of his children who are now spread over time and space. However, if one consults Caryl Phillips’s archives, which are housed by the Beinecke Library at Yale University, one becomes aware of another “chorus of a common memory,” made up of voices that did not make it into the book, but which are nonetheless important pieces in the writer’s diasporic puzzle. What I would like to do in this paper is retrieve these lost voices by looking at Phillips’s archives, notably at an early unpublished radio play entitled “Crossing the River” and at the early drafts of the third section of the eponymous novel, and see how these documents relate to the novel’s final published version. Such a reading will enable to trace the literary genesis of one of Phillips’s most popular texts while also allowing us to imagine what the book would have been like if Phillips had made different choices. [less ▲]

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See detailX-ray tomography : a tool for revealing local distribution of liquid in structured packed columns
Toye, Dominique ULg

Conference (2017, May)

Presentation of the x-ray tomography setup and of the experimental results relative to the fluid distribution and to the flow morphology in a column packed with high performance packing (Mellapak 752Y ... [more ▼]

Presentation of the x-ray tomography setup and of the experimental results relative to the fluid distribution and to the flow morphology in a column packed with high performance packing (Mellapak 752Y). The influence of liquid flowrate and of liquid viscosity is addressed. Results are used to get information required to model the mass-transfer performance in the column. [less ▲]

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See detailPreserving the Story of Heritage in Ruins Using Online Digital Repositories; The Case of Urbex
Eisazadeh, Negin ULg; Bordalejo, Barbara

Conference (2017, May)

Urban explorers have for some time been producing informal iconographic and textual records of manmade structures which because of being abandoned or inaccessible for the general public, are not usually ... [more ▼]

Urban explorers have for some time been producing informal iconographic and textual records of manmade structures which because of being abandoned or inaccessible for the general public, are not usually in the public eye and are often in a state of deterioration and in danger of being destroyed. This interdisciplinary research which connects the fields of architecture, history, conservation, and digital humanities, looks into the materials recorded by the urban exploration (urbex) community and investigates their potential for the protection and documentation of decaying or demolished abandoned architectural heritage sites. For the management and dissemination of heritage information for the abandoned sites, more specifically, the recently demolished Château de Noisy, a famous urbex destination in Belgium, this study explores and builds upon the existing digital resources and looks into various tools and techniques to compile, curate and present this data to narrate the story of abandoned heritage sites. Additionally, through visualisation of data collected, cleaned, and compiled using the Flickr application programming interface (Flickr API) and Python, the changes in the urbex community’s activity since their debut on Flickr are observed. This research shows the value of the existing urbex digital data for documentation and potential conservation of abandoned heritage sites and demonstrates how a mindful digital narration of even a demolished heritage site can create an engaging and immersive experience which records and preserves the heritage and its story. Additionally, it can raise public awareness which in the case of deteriorating abandoned sites can lead to their potential revival. [less ▲]

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See detailLe Service de l’Évaluation Spéciale de la coopération belge au développement : un acteur singulier – retours de terrain.
Contor, Justine ULg

Conference (2017, May)

Cette communication propose de revenir sur nos résultats de terrain s’intéressant à l’évolution d’un acteur singulier de la politique de coopération belge au développement : le Service de l’Évaluation ... [more ▼]

Cette communication propose de revenir sur nos résultats de terrain s’intéressant à l’évolution d’un acteur singulier de la politique de coopération belge au développement : le Service de l’Évaluation Spéciale (SES). Il s’agit d’un service d’évaluation de la politique fédérale de coopération belge au développement, créé à la suite d’une crise politique majeure à la fin des année 1990 en Belgique. À sa création en 2003, le SES est chargé d’évaluer toutes les activités relatives aux politiques de coopération au développement, et de rendre compte au Parlement fédéral belge à propos des conclusions et recommandations issues des évaluations. Mais, le Service a rencontré de nombreuses difficultés opérationnelles, budgétaires, internes et externes, voyant sa légitimité remise en cause. En 2013, l’ancien chef de service voit la fin de son mandat arriver et avec elle la fin (presque) certaine du SES. En 2014, une nouvelle alliance politique est au pouvoir en Belgique et un nouveau ministre est en charge de la coopération au développement. Il entreprend une réforme et le SES se voit attribuer de nouvelles compétences, davantage stratégiques. Il est désormais chargé, en plus de ces missions passées, de conseiller l’administration et le ministre ; de certifier, d’évaluer et d’harmoniser les systèmes de suivi et d’évaluation de l’ensemble des acteurs de la coopération belge. Un nouveau chef de service a été nommé et le SES doit faire face à de nouveaux défis : méthodologique, thématiques, opérationnels, en termes de vision, ou encore en ce qui concerne sa communication interne et externe. [less ▲]

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See detailUltrasonic spray coating of electrochromic nanomaterials
Maho, Anthony ULg; Manceriu, Laura ULg; Colson, Pierre ULg et al

Conference (2017, May)

Detailed reference viewed: 24 (3 ULg)
See detailL'intrapreneuriat, vecteur de nouvelles formes de collaborations ?
Lisein, Olivier ULg

Conference (2017, May)

Intervention sur les enjeux, les challenges et les bénéfices potentiels de l'intrapreneuriat comme vecteur d'innovations et de collaborations pour et au sein des entreprises. Intervention réalisée lors de ... [more ▼]

Intervention sur les enjeux, les challenges et les bénéfices potentiels de l'intrapreneuriat comme vecteur d'innovations et de collaborations pour et au sein des entreprises. Intervention réalisée lors de la table ronde "Interview d’experts: Les nouvelles pratiques de management dans l’entreprise collaborative" dont le fil conducteur est résumé comme suit : "Face à un marché en pleine mutation, nous verrons lors de cette table ronde quelles actions de management les entreprises mettent en place pour valoriser les individus et développer leurs compétences, mais aussi pérenniser une relation empreinte d’autonomie". [less ▲]

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See detailDes friches minières comme capital rural ?
Schmitz, Serge ULg

Conference (2017, May)

La communication a pour but de proposer un typologie théorique des friches minières et d'interroger leur potentiel de développement.

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See detailProcess intensification of the synthesis of glycerol carbonate under microwave irradiation or continuous-flow conditions
Estager, Julien; Pleck, Julie; Gerardy, Romaric ULg et al

Conference (2017, May)

Despite low crude oil prices and the increasing access to shale gas, the establishment of a biobased economy remains a worldwide priority. An integrated biobased economy would not only consider renewable ... [more ▼]

Despite low crude oil prices and the increasing access to shale gas, the establishment of a biobased economy remains a worldwide priority. An integrated biobased economy would not only consider renewable biobased resources to provide industrially relevant chemicals, but would also redefine chemical processing by using greener, safer and more selective process technologies. The last few decades have witnessed the emergence of promising alternative energy sources such as microwave irradiation and alternative process technology such as continuous-flow reactors. Even if biobased chemicals are still marginal on the marklet compared to petrochemicals, many biorefineries are now able to convert biomass into biobased chemical building blocks of good purity on large scales. Amongst these products, glycerol – a side product of the biodiesel industry – is a particularly appealing chemical platform thanks to its high functionality and its wide availability. Various high-value added chemicals can be obtained from glycerol, among which glycerol carbonate retained our attention. Glycerol carbonate is an attractive glycerol derivative that can be used in many applications ranging from low-VOC solvent to polymer synthesis. Many publications describe its synthesis using different catalysts or alternative activation methods such as microwave. Our research effort in process intensification for the industrial valorization of biomass led us to develop an intensified carbonation process of glycerol under microwave irradiation, affording an unprecedented reactivity with short reaction times and high selectivity towards glycerol carbonate. Based on this preliminary study, and using the microwave-to-flow paradigm, continuous-flow processes using mesofluidic reactors have been developed to obtain glycerol carbonate in good yield and high purity. [less ▲]

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See detailAmbulatory System for Gait Analysis
Boutaayamou, Mohamed ULg; Bruls, Olivier ULg; Croisier, Jean-Louis ULg et al

Conference (2017, April 29)

We describe the principle and use of a wireless, 3-axis accelerometer-based ambulatory system that records acceleration signals and automatically analyses them to characterize normal and pathological gait ... [more ▼]

We describe the principle and use of a wireless, 3-axis accelerometer-based ambulatory system that records acceleration signals and automatically analyses them to characterize normal and pathological gait. The associated algorithm is versatile enough to detect, on a stride-by-stride basis, refined gait parameters that quantify subtle gait disturbances in, e.g., in Parkinson’s disease in a rater-independent way. The experimental results show the potential of the developed accelerometer-based technique to be used in neurology (e.g., characterization of Parkinsonian gait: slowness, shuffling, short steps, freezing of gait, asymmetries in gait), rehabilitation, geriatrics (ex. monitoring activity parameters in the elderly), orthopedics and sport. [less ▲]

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See detailMotion analysis: a prevention tool
Schwartz, Cédric ULg; CROISIER, Jean-Louis ULg; Forthomme, Bénédicte ULg et al

Conference (2017, April 28)

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See detailLe marché du livre à Bruxelles au XVIe siècle
Adam, Renaud ULg

Conference (2017, April 28)

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Peer Reviewed
See detailPathological hip fractures
KURTH, William ULg

Conference (2017, April 28)

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Peer Reviewed
See detailPosterior approach in total hip arthroplasty
KURTH, William ULg

Conference (2017, April 28)

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See detailThe role of coordinators in the internment public policy translation
Darcis, Coralie ULg

Conference (2017, April 28)

With this presentation, we would like to focus on the particular role of “coordinators” within a context of policy implementation process (Multiannual plans and Masterplan). We will show that the TSI ... [more ▼]

With this presentation, we would like to focus on the particular role of “coordinators” within a context of policy implementation process (Multiannual plans and Masterplan). We will show that the TSI Coordinators endorsed a role of “Translators” [Latour and Callon] since they are at the heart of this implementation process. We therefore argue that those Health Coordinators circulate knowledge between policy-makers and field professionals, between justice and health professionals and between other health coordinators and themselves. This circulation of knowledge can be observed in meetings organised at both the local and federal levels, as well as through more informal meetings and participation in working groups. Coordinators are also inscribing knowledge by writing documents, mails and minutes of meetings. Finally, we would like to argue that this circulation and inscription of knowledge allow the policy implementation process by reinforcing the articulation [Strauss] both between local and policy levels and between justice and health sectors. [less ▲]

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See detailImplémentation du programme Lidcombe dans la prise en charge du bégaiement en clinique francophone
Leclercq, Anne-Lise ULg

Conference (2017, April 28)

This talk presents preliminary results of the Lidcombe program on French stuttering preschool children. The purpose is to discuss its effectiveness in regular clinical context, and with various profiles ... [more ▼]

This talk presents preliminary results of the Lidcombe program on French stuttering preschool children. The purpose is to discuss its effectiveness in regular clinical context, and with various profiles of children. [less ▲]

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See detailThe Prediction-Focused Approach: An opportunity for hydrogeophysical data integration and interpretation
Hermans, Thomas ULg; Nguyen, Frédéric ULg; Klepikova, Maria et al

Conference (2017, April 28)

Hydrogeophysics is an interdisciplinary field of sciences aiming at a better understanding of subsurface hydrological processes. If geophysical surveys have been successfully used to qualitatively ... [more ▼]

Hydrogeophysics is an interdisciplinary field of sciences aiming at a better understanding of subsurface hydrological processes. If geophysical surveys have been successfully used to qualitatively characterize the subsurface, two important challenges remain for a better quantification of hydrological processes: (1) the inversion of geophysical data and (2) their integration in hydrological subsurface models. The classical inversion approach using regularization suffers from spatially and temporally varying resolution and yields geologically unrealistic solutions without uncertainty quantification, making their utilization for hydrogeological calibration less consistent. More advanced techniques such as coupled inversion allow for a direct use of geophysical data for conditioning groundwater and solute transport model calibration. However, the technique is difficult to apply in complex cases and remains computationally demanding to estimate uncertainty. In a recent study, we investigate a prediction-focused approach (PFA) to directly estimate subsurface physical properties from geophysical data, circumventing the need for classic inversions. In PFA, we seek a direct relationship between the data and the subsurface variables we want to predict (the forecast). This relationship is obtained through a prior set of subsurface models for which both data and forecast are computed. A direct relationship can often be derived through dimension reduction techniques. PFA offers a framework for both hydrogeophysical “inversion” and hydrogeophysical data integration. For hydrogeophysical “inversion”, the considered forecast variable is the subsurface variable, such as the salinity. An ensemble of possible solutions is generated, allowing uncertainty quantification. For hydrogeophysical data integration, the forecast variable becomes the prediction we want to make with our subsurface models, such as the concentration of contaminant in a drinking water production well. Geophysical and hydrological data are combined to derive a direct relationship between data and forecast. We illustrate the process for the design of an aquifer thermal energy storage (ATES) system. An ATES system can theoretically recover in winter the heat stored in the aquifer during summer. In practice, the energy efficiency is often lower than expected due to spatial heterogeneity of hydraulic properties combined to a non-favorable hydrogeological gradient. A proper design of ATES systems should consider the uncertainty of the prediction related to those parameters. With a global sensitivity analysis, we identify sensitive parameters for heat storage prediction and validate the use of a short term heat tracing experiment monitored with geophysics to generate informative data. First, we illustrate how PFA can be used to successfully derive the distribution of temperature in the aquifer from ERT during the heat tracing experiment. Then, we successfully integrate the geophysical data to predict medium-term heat storage in the aquifer using PFA. The result is a full quantification of the posterior distribution of the prediction conditioned to observed data in a relatively limited time budget. [less ▲]

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See detailOccurrence of greenhouse gases (CO2, N2O and CH4) in groundwater of the Walloon Region (Belgium).
Jurado Elices, Anna ULg; Borges, Alberto ULg; Pujades, Estanislao ULg et al

Conference (2017, April 28)

Greenhouse gases (GHGs) are an environmental problem because their concentrations in the atmosphere have continuously risen since the industrial revolution. They can be indirectly transferred to the ... [more ▼]

Greenhouse gases (GHGs) are an environmental problem because their concentrations in the atmosphere have continuously risen since the industrial revolution. They can be indirectly transferred to the atmosphere through groundwater discharge into surface water bodies such as rivers. However, their occurrence is poorly evaluated in groundwater. The aim of this work is to identify the hydrogeological contexts (e.g., chalk and limestone aquifers) and the most conductive conditions for the generation of GHGs in groundwater at a regional scale. To this end, carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) concentrations, major and minor elements and environmental isotopes were monitored in several groundwater bodies of the Walloon Region (Belgium) from September 2014 to June 2016. The concentrations of GHGs in groundwater ranged from 1769 to 100519 ppm for the partial pressure of CO2 and from 0 to 1064 nmol/L and 1 to 37062 nmol/L for CH4 and N2O respectively. Over- all, groundwater was supersaturated in GHGs with respect to atmospheric equilibrium, suggesting that groundwater contribute to the atmospheric GHGs budget. Prior inspection of the data suggested that N2O in groundwater can be produced by denitrification and nitrification. The most suitable conditions for the accumulation of N2O are promoted by intermediate dissolved oxygen concentrations (2.5-3 mg L−1) and the availability of nitrate (NO3 ). These observations will be compared with the isotopes of NO3 . CH4 was less detected and at lower concentration than N2O, suggesting that groundwater redox conditions are not reducing enough to promoted the production of CH4. The results will be presented and discussed in detail in the presentation. [less ▲]

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See detailDeveloping suitable methods for effective characterization of electrical properties of root segments
Ehosioke, Solomon ULg; Phalempin, Maxime; Garré, Sarah ULg et al

Conference (2017, April 28)

Developing suitable methods for effective characterization of electrical properties of root segments Solomon Ehosioke (1), Maxime Phalempin (2), Sarah Garré (3), Andreas Kemna (4), Sander Huisman (5 ... [more ▼]

Developing suitable methods for effective characterization of electrical properties of root segments Solomon Ehosioke (1), Maxime Phalempin (2), Sarah Garré (3), Andreas Kemna (4), Sander Huisman (5), Mathieu Javaux (2), and Frédéric Nguyen (1) (1) Department of Architecture, Geology, Environment & Constructions, university of Liege, Liège, Belgium, (2) Earth and Life Institute, Environmental Science, Université catholique de Louvain, Louvain-la-Neuve, Belgium, (3) Biosystems Engineering Department, Gembloux Agro-Bio Tech, University of Liege, Gembloux, Belgium, (4) Department of Geophysics, Steinmann Institute, University of Bonn, Germany, (5) Agrosphere (IBG3), Forschungszentrum Ju¨lich GmbH, Ju¨lich, Germany The root system represents the hidden half of the plant which plays a key role in food production and therefore needs to be well understood. Root system characterization has been a great challenge because the roots are buried in the soil. This coupled with the subsurface heterogeneity and the transient nature of the biogeochemical processes that occur in the root zone makes it difficult to access and monitor the root system over time. The traditional method of point sampling (root excavation, monoliths, minirhizotron etc.) for root investigation does not account for the transient nature and spatial variability of the root zone, and it often disturbs the natural system under investigation. The quest to overcome these challenges has led to an increase in the application of geophysical methods. Recent studies have shown a correlation between bulk electrical resistivity and root mass density, but an understanding of the contribution of the individual segments of the root system to that bulk signal is still missing. This study is an attempt to understand the electrical properties of roots at the segment scale (1-5cm) for more effective characterization of electrical signal of the full root architecture. The target plants were grown in three different media (pot soil, hydroponics and a mixture of sand, perlite and vermiculite). Resistance measurements were carried out on a single segment of each study plant using a voltmeter while the diameter was measured using a digital calliper. The axial resistance was calculated using the measured resistance and the geometric parameters. This procedure was repeated for each plant replica over a period of 75 days which enabled us to study the effects of age, growth media, diameter and length on the electrical response of the root segments of the selected plants. The growth medium was found to have a significant effect on the root electrical response, while the effect of root diameter on their electrical response was found to vary among the plants. More work is still required to further validate these results and also to develop better systems to study the electrical behaviour of root segments. Findings from our review entitled “an overview of the geophysical approach to root investigation”, suggest that SIP and EIT geophysical methods could be very useful for root investigations, thus more work is in progress to develop these systems for assessing the root electrical response at various scales. [less ▲]

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See detailA landslide susceptibility map of Africa
Broeckx, Jente; Vanmaercke, Matthias ULg; Duchateau, Rica et al

Conference (2017, April 28)

Studies on landslide risks and fatalities indicate that landslides are a global threat to humans, infrastructure and the environment, certainly in Africa. Nonetheless our understanding of the spatial ... [more ▼]

Studies on landslide risks and fatalities indicate that landslides are a global threat to humans, infrastructure and the environment, certainly in Africa. Nonetheless our understanding of the spatial patterns of landslides and rockfalls on this continent is very limited. Also in global landslide susceptibility maps, Africa is mostly underrepresented in the inventories used to construct these maps. As a result, predicted landslide susceptibilities remain subject to very large uncertainties. This research aims to produce a first continent-wide landslide susceptibility map for Africa, calibrated with a well-distributed landslide dataset. As a first step, we compiled all available landslide inventories for Africa. This data was supplemented by additional landslide mapping with Google Earth in underrepresented regions. This way, we compiled 60 landslide inventories from the literature (ca. 11000 landslides) and an additional 6500 landslides through mapping in Google Earth (including 1500 rockfalls). Various environmental variables such as slope, lithology, soil characteristics, land use, precipitation and seismic activity, were investigated for their significance in explaining the observed spatial patterns of landslides. To account for potential mapping biases in our dataset, we used Monte Carlo simulations that selected different subsets of mapped landslides, tested the significance of the considered environmental variables and evaluated the performance of the fitted multiple logistic regression model against another subset of mapped landslides. Based on these analyses, we constructed two landslide susceptibility maps for Africa: one for all landslide types and one excluding rockfalls. In both maps, topography, lithology and seismic activity were the most significant variables. The latter factor may be surprising, given the overall limited degree of seismicity in Africa. However, its significance indicates that frequent seismic events may serve as in important preparatory factor for landslides. This finding concurs with several other recent studies. Rainfall explains a significant, but limited part of the observed landslide pattern and becomes insignificant when also rockfalls are considered. This may be explained by the fact that a significant fraction of the mapped rockfalls occurred in the Sahara desert. Overall, both maps perform well in predicting intra-continental patterns of mass movements in Africa and explain about 80% of the observed variance in landslide occurrence. As a result, these maps may be a valuable tool for planning and risk reduction strategies. [less ▲]

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See detailGlobally significant greenhouse-gas emissions from African inland waters
Borges, Alberto ULg; Bouilon, S

Conference (2017, April 28)

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See detailAgroforestry in temperate regions: where does the water go?   A case study with ERT in a corn field bordered by poplar trees.
MALOTEAU, Sophie ULg; Coussement, Tom; Pardon, Paul et al

Conference (2017, April 28)

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See detailMeeting Fronstage, Deciding Backstage
Slomian, Cynthia ULg

Conference (2017, April 27)

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See detailTowards standardisation of practitioners' knowledge: the case of private intermediaries of the labour market
Gérard, Julie ULg

Conference (2017, April 27)

This contribution analyses the stakes of activation policies in the French-speaking part of Belgium. It focuses on the private intermediaries of the labour market in "public-private partnership" with ... [more ▼]

This contribution analyses the stakes of activation policies in the French-speaking part of Belgium. It focuses on the private intermediaries of the labour market in "public-private partnership" with Belgian public employment services. It examines intermediaries‘work in devising and implementing employment policies and more precisely a particular activation measure called the job seeker’s support. This measure intends to improve job seekers’ socio-professional reinsertion by reducing exclusion and encouraging the return to employment. The sociological analysis of this activation measure relies on in-depth analyses of four categories of private intermediaries mandated by Belgian public employment services to support job seekers towards employment. The analyses are based on a qualitative and empirical research combining direct observations (N=254), semi-structured interviews and documentary analyses (N=29). Theoretically, they rely on the sociology of public action. This contribution demonstrates that, despite organisational contingencies and the discretionary power of the involved actors in implementing employment policies, the work of the private intermediaries of the labour market participates in increasing the standardisation of public action. This standardisation represents the transformation of knowledge that is enacted through interaction between job seekers’ and practitioners, private intermediaries of the labour market. This one inscribes and standardises knowledge into norms, figures and instruments (such as reporting, dashboards). This process, from enacted to inscribed knowledge, embodies institutional pressures in supporting job seekers and relies on new modes of delivery and implementation employment policies. [less ▲]

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See detailWater chemical evolution in Underground Pumped Storage Hydropower plants and induced consequences.
Pujades, Estanislao ULg; Orban, Philippe ULg; Jurado Elices, Anna ULg et al

Conference (2017, April 27)

Underground Pumped Storage Hydropower (UPSH) using abandoned mines is an alternative to manage the elec- tricity production in flat regions. UPSH plants consist of two reservoirs; the upper reservoir is ... [more ▼]

Underground Pumped Storage Hydropower (UPSH) using abandoned mines is an alternative to manage the elec- tricity production in flat regions. UPSH plants consist of two reservoirs; the upper reservoir is located at the surface or at shallow depth, while the lower reservoir is underground. These plants have potentially less constraints that the classical Pumped Storage Hydropower plants because more sites are available and impacts on landscape, land use, environment and society seem lower. Still, it is needed to consider the consequences of the groundwater exchanges occurring between the underground reservoir and surrounding porous media. Previous studies have been focused on the influence of these groundwater exchanges on the efficiency and on groundwater flow impacts. However, hydrochemical variations induced by the surface exposure of pumped water and their consequences have not been yet addressed. The objective of this work is to evaluate the hydrochemical evolution of the water in UPSH plants and its effects on the environment and on the UPSH efficiency. The problem is studied numerically by means of reactive transport modelling. Different scenarios are considered varying the chemical properties of the surrounding porous medium and groundwater. Results show that the dissolution and/or precipitation of some compounds may affect (1) the groundwater quality, and (2) the efficiency and the useful life of the used pumps and turbines of the UPSH system. [less ▲]

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See detailA Belgian reform towards an integrated care system for chronic patients: the ubiquity of knowledge
De Winter, Mélanie ULg

Conference (2017, April 27)

Countries all over Europe are currently facing budgetary pressures regarding their health care systems due to scientific progress, population ageing and a sharp rise in chronic diseases. In the European ... [more ▼]

Countries all over Europe are currently facing budgetary pressures regarding their health care systems due to scientific progress, population ageing and a sharp rise in chronic diseases. In the European Union, chronic diseases are now the leading cause of death and the most important item of health expenditures (Schokkaert &Van de Voorde, 2011). In 2015, the Belgian Health Ministers launched a joint public health plan called “Integrated Care for Better Health” (2015) to bring about a transition from an institutional system to an integrated care system for patients with chronic diseases. The authorities are nevertheless uncertain of the solutions to adopt in the Belgian context. Consequently, they have chosen to turn this plan into practice through 4-year pilot projects as part of an iterative and incremental implementation strategy. These iterative and incremental aspects entail a constant production and circulation of knowledge by and between actors involved in the co-construction process, between policy-makers and field actors responsible for policy implementation. As a result, this presentation focuses on concrete practices (preparatory meetings, plenary sessions, recourse to websites and forums, writing documents, etc.) that enact and stabilize knowledge that is produced, transformed and circulated between the different actors of the care production chain. These practices will be identified thanks to the methodological triangulation approach (policy documentary analysis, direct observation, semi-structured interviews). [less ▲]

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See detailLorrAgri: methodology and experience of a territorial transition lab
Feyereisen, Marlène ULg

Conference (2017, April 27)

Many scholars have underlined the potential of spatialized (or territorialized) approaches to analyse and guide the transition of the agrifood system. For example, scale reductions often associated with ... [more ▼]

Many scholars have underlined the potential of spatialized (or territorialized) approaches to analyse and guide the transition of the agrifood system. For example, scale reductions often associated with territorialisation offers the opportunity to modify power relations between actors and permits to improve their ability to act – or empower. While territorialized approaches to transition management are promising, to date only few studies have considered these aspects in unison. This study presents the methodology used to design and guide a transition management experience. We describe the tools used, issues raised, and potential benefits of the experience for transition, as well as challenges and limitations. Furthermore, we investigate how tools from transition theories were able to support the experience (multi-level perspective, transition management and strategic niche management). LorrAgri is a “territorial transition lab” organised from early 2016 until present day, and aims to develop the local agrifood system (in particular vegetables) in the rural area of Belgian Lorraine in the South of Belgium. This area has relatively well-developed non-conventional agriculture compared to the rest of Belgium, and recently developed market gardening. The present work is based on extensive data selection, including semi-structured interviews and participant observations. Strategic analysis sociology was used to identify possible strategies and challenges between actors of the agrifood system in the selected territory. From these diagnostics of the territory and its actors, the LorrAgri group was created in January 2016, initially with market gardeners. Over time, organisations joined also (both from the regime and niches) which work on local agrifood development, culminating today in the active support and involvement of local politics. Analyses were conducted at several of these stages, and fed by inputs from transition theories. Our study shows that the territorialized approach can enable cooperation between actors which oppose each other, in terms of norms and values. Therefore, LorrAgri is an interesting case study to analyse modes of cooperation between actors e.g. from the regime and the niches, and how norms and values from different levels can influence each other (transition in-the-making). This study also details how participants found a common objective for developing the local agrifood system, namely to supply local products to collective catering, e.g. school canteens and restaurants. [less ▲]

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See detailProfil d'acides gras et stabilité oxydative d'huiles de brisures d'amandons et d'écarts de tri des amandes
Houmy, Nadia ULg; Melhaoui, R; Sindic, Marianne ULg et al

Conference (2017, April 27)

Dans la région orientale du Maroc, en outre du projet *PROFAO, la filière Amandier bénéficie d'une attention particulière. Cependant, les opérations de concassage et de triage des amandes se font encore ... [more ▼]

Dans la région orientale du Maroc, en outre du projet *PROFAO, la filière Amandier bénéficie d'une attention particulière. Cependant, les opérations de concassage et de triage des amandes se font encore de façon artisanale. Dans un but de valorisation après le décorticage/concassage, les brisures et les écarts de tri des amandes, ayant une faible valeur marchande, servent à l'extraction d'huile pour usage alimentaire et cosmétique. Ce travail porte sur l'analyse chimique d'huiles de brisures d'amandes (HbA) et la détermination de leur stabilité oxydative. Ainsi sur trois compagnes agricoles consécutives 2014, 2015, 2016, des analyses par CPG FID des profils d'acides gras (AG) des HbA des variétés Marcona Ferragnes-Ferraduel, ont été effectuées. L'acide Oléique (C18:1) et l'acide Linoléique (C18:2) sont les deux AG majoritaires qui caractérisent les profils d'AG des HbA. Selon l'année de récolte, ces HbA ont montré des variations inter variétale, les différences observées sont significatives et sont de l'ordre de 15 % pour C18:1 et de 13 % pour C18:2. Ainsi la teneur des HbA analysées en C18:1 varie entre un taux-max de 72 % enregistré en 2013/2014 pour Ferrangnes-Ferraduel et un taux-minima de 57 % observé en 2015/2016 pour Marcona. La même remarque pour le C18:2 avec une teneur minimum de 17 % enregistré en 2013/2014 pour Ferragnes-Ferraduel et une teneur maximum de 30 % observé en 2015/2016 pour Marcona. Pour le rapport O/L la plus grande différence a été observée en 2013/2014, avec un ratio O/L de 4,1 pour l'HbA Ferragnes-Ferraduel et de 1,95 pour Marcona. Les résultats observés pour la stabilité oxydative des Hba estimée par des tests Rancimat montrent des valeurs qui varient entre un minimum de 20h pour l'HbA Marcona en 2013/2014 et un maximum de 29h pour l'HbA Ferragnes Ferraduel en 2015/2016. On note une corrélation positive entre la stabilité oxydative et la teneur des HbA en C18:1 ainsi qu'avec le ratio O/L. La suite logique de ce travail est la recherche d'une correlation entre la stabilité oxydative et les composants mineurs de l'huile notamment ceux à activité antioxydante tel les tocophérols. [less ▲]

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See detail“New Ways of Working” and their managerial myths: the resurgence of liberation and distributed surveillance?
Jemine, Grégory ULg

Conference (2017, April 27)

Through this contribution we aim to explore how two well-known bodies of knowledge, namely the panopticism as developed by Foucault (2012) and the works from the Human Relations movement (Mayo, 1949) are ... [more ▼]

Through this contribution we aim to explore how two well-known bodies of knowledge, namely the panopticism as developed by Foucault (2012) and the works from the Human Relations movement (Mayo, 1949) are being reprocessed and reinjected by managerial actors in organisational projects of “modernisation” such as “New Ways of Working”. Nowadays, in open and flexible workspaces, visual and acoustic privacy at work tend to disappear (Van der Voort, 2004) which leaves room for a constant monitoring of employees’ behaviours, mainly performed by the peers (Sewell & Taskin, 2015). The old managerial myth of distributed surveillance resurfaces as everyone is in a position to monitor his colleagues, generating a global feeling of unease. Simultaneously several managerial discourses advocate for abolishing direct supervision and liberating the employees of the bureaucratic factors through self-managed teams and empowerment. The defenders of “freedom” in companies build their argumentation on former findings from the Human Relations movement such as the improved efficiency of small groups and the benefits of removing rules. In an historical perspective, we wonder why and how such elements of knowledge produced several decades ago now become performative in several Belgian companies. [less ▲]

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See detailSedimentation influx and volcanic interactions in the Fuji Five Lakes: implications for paleoseismological records
Lamair, Laura ULg; Hubert, Aurelia ULg; Yamamoto, Shinya et al

Conference (2017, April 27)

The Fuji Fives Lakes are located at the foot of Mount Fuji volcano close to the triple junction, where the North American Plate, the Eurasian plate and the Philippine Sea Plate meet. These lakes are ... [more ▼]

The Fuji Fives Lakes are located at the foot of Mount Fuji volcano close to the triple junction, where the North American Plate, the Eurasian plate and the Philippine Sea Plate meet. These lakes are ideally situated to study Mount Fuji volcanism and the interaction between volcanism, changes in lake sedimentation rates and the ability of lakes to record paleoearthquakes. Here, we present newly acquired geological data of Lake Yamanaka and Lake Motosu, including seismic reflection profiles, gravity and piston cores. These two lakes and their respective watersheds were affected by several eruptions of Mount Fuji. Lake Yamanaka, a very shallow lake (max. depth 14 m), was heavily impacted by the scoria fall-out of the A.D. 1707 Hoei eruption of Mount Fuji. A detailed investigation of the effect of the Hoei eruption was conducted on short gravity cores, using high resolution XRD, C/N and 210Pb/137Cs analyses. The preliminary results suggest that the sedimentation rate of Lake Yamanaka drastically reduced after the Hoei eruption, followed by an increase until the present day. Similarly, lacustrine sedimentation in Lake Motosu (max. depth 122 m) was disturbed by Mount Fuji volcanism at a larger scale. The watershed of Lake Motosu was impacted by several lava flows and scoria cones. For example, the Omuro scoria cone reduced the catchment size of Lake Motosu and modified its physiography. The related scoria fall out covered an extensive part of the lake catchment and reduced terrigenous sedimentary influx to Lake Motosu. Within the deep basin of Lake Motosu, seismic reflection data shows two different periods that are distinguished by a major change in the dominant sedimentary processes. During the first period, sublacustrine landslides and turbidity currents were the dominant sedimentation processes. During the second one, the seismic stratigraphy evidences only deposition of numerous turbidites interrupting the hemipelagic sedimentation. Changes in sedimentary processes can be linked to the modification of the lake watershed by Mount Fuji volcanism, leading to a decrease in the sediment volume that can be remobilized, and therefore disappearance of large sublacustrine landslides. Turbidites are deposited due to surficial remobilization of lake slope sediments most probably as a result of earthquake shaking. When studying sedimentological records of lakes to define the paleoearthquake record, eruptions of nearby volcanoes should be taken into account. This study suggests that a large magnitude earthquake occurring few decades after a volcanic eruption (with large scale scoria fall-out), might not be recorded in a lake, or would only be fingerprinted in the sedimentary record by small turbiditic flows. References: Miyaji N., Kan'no A., Kanamaru T., Mannen K. 2011. High-resolution reconstruction of the Hoei eruption (AD 1707) of Fuji volcano, Japan. Journal of Volcanology and Geothermal Research 207, 113–129. [less ▲]

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See detailPraxis, besoins et impératifs affectifs : Réflexions sur la normativité de la conscience émue.
Recchia, Fabio ULg

Conference (2017, April 26)

L'objectif de cette communication consiste à dégager les caractéristiques normatives de la conscience émue. Nous mobiliserons pour ce faire la thématique des "impératifs affectifs", qui est abondamment ... [more ▼]

L'objectif de cette communication consiste à dégager les caractéristiques normatives de la conscience émue. Nous mobiliserons pour ce faire la thématique des "impératifs affectifs", qui est abondamment discutée par Sartre dans "Les Racines de l'éthique". Sur cette base, nous développerons une réflexion en trois temps. 1° Nous situerons tout d'abord les "Racines de l'éthique" dans la continuité des réflexions de "l'Esquisse d'une théorie des émotions". 2° Nous montrerons ensuite que l'analyse des impératifs affectifs enveloppe une critique du positivisme, qui est une approche massivement adoptée par nombre de philosophie des émotions. 3° Enfin, nous approfondirons la description sartrienne des impératifs affectifs à partir de "L'Émile" de Jean-Jacques Rousseau. L'association de l'un et l'autre texte nous permettra en effet de commenter la "seconde forme d'émotion" qui est très allusivement décrite par les dernières pages de l'Esquisse d'une théorie des émotions. Plus largement, ce détour par la philosophie politique des modernes permettra d'établir un dialogue entre la phénoménologie sartrienne de l'affectivité et l'approche de la normativité qui est proposée par la philosophie française des sciences sociales. [less ▲]

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See detailDiabetes and the kidney disease risk
Krzesinski, Jean-Marie ULg

Conference (2017, April 26)

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See detailConstitutus = καϑεστώς : un hellénisme de la langue juridique ?
Rochette, Bruno ULg

Conference (2017, April 26)

Le participe parfait constitutus (ainsi que positus) a été vu comme une sorte de substitut destiné à pallier l’absence en latin de participe présent du verbe être (*ens, entis). Plusieurs auteurs ont ... [more ▼]

Le participe parfait constitutus (ainsi que positus) a été vu comme une sorte de substitut destiné à pallier l’absence en latin de participe présent du verbe être (*ens, entis). Plusieurs auteurs ont considéré cet emploi comme un hellénisme propre à la langue juridique en soulignant que, dans les Novellae de Justinien, constitutus est une traduction du grec καϑεστώς, qui a un sens actif. On en a déduit qu’il pourrait s’agir d’une particularité de la langue des juristes qui apparaît pour la première fois chez Julianus [4], Scaevola [6], Papinien [5] et Ulpien [8]. Cet emploi, qui ne semble pas antérieur à Sénèque [7], n’est toutefois pas spécifique aux juristes. On le rencontre dans le latin de l’Empire, spécialement chez des auteurs africains chrétiens et païens, comme Apulée [2] et Cyprien de Carthage [3], et surtout dans la langue tardive (Ammien Marcellin [1]). Cet usage pose la question de la spécificité de la langue des juristes et de l’influence éventuelle du grec sur cette langue technique. Une étude plus systématique des prétendus hellénismes chez le juriste Gaius, peut-être d’origine orientale, montre que l’influence du grec sur son latin, si elle a existé, est assez réduite. Un grand nombre de particularités qui ont été considérées comme des hellénismes sont en réalité des spécificités du latin tardif et connaissent des parallèles chez des auteurs comme Apulée, Tertullien, Augustin, Ammien Marcellin. J’étudie ici les emplois de constitutus comme prétendu substitut du participe présent de esse dans un corpus assez large de textes : Arnobe, Firmicus Maternus, Lactance, Hilaire, Lucifer, Ambroise, Jérôme, Sulpice Sévère, Cassien, Orose… jusqu’à Cassiodore. On trouve aussi cette tournure assez souvent dans la Vulgate. Pour expliquer cette spécificité, l’influence du grec n’est pas une donnée nécessaire. Il s’agit essentiellement, comme d’autres phénomènes, d’une évolution du latin, qui a sans doute éprouvé le besoin de combler la lacune de l’absence du participe présent du verbe « être », ce qui arrivera au Moyen Âge avec la création de *ens, entis, déjà proposé par Jules César. Exemples [1] Ammien Marcellin, XX, 3, 12 : eodem adhuc constituto [2] Apulée, Mét., IV, 11 : Tunc nos in ancipiti periculo constituti uel op primendi nostri uel deserendi socii remedium e re nata ualidum eo uolente comminiscimus. [3] Cyprien, Ep., 1, 1 : in clerico ministerio constituti [4] Julianus Dig. 24, 2, 6 : in captiuitate constitutus [5] Papinien Dig. 35, 1, 77, 3 : impubere filia constituta [6] Scaevola Dig. 4, 4, 39, 1 : curatoribus eius idoneis constitutis [7] Sénèque, NQ, III, 10, 3 : natura partes suas velut in ponderribus constitutas exanimat [8] Ulpien Dig. 3, 5, 19 : Ulpianus libro decimo ad edictum. sin autem apud hostes constitutus decessit, et successori et aduersus successorem eius negotiorum gestorum directa et contraria competit. Bibliographie GARCEA A., Caesar’s De analogia. Edition, Translation, and Commentary, Oxford, 2012. KALB W., Das Juristenlatein. Versuch einer Charakteristik auf Grundlage der Digesten, Nürnberg 1888 [Aalen 1961] --, Roms Juristen nach ihrer Sprache dargestellt, Leipzig 1890 [Aalen 1975]. LÖFSTEDT E., Zur Frage der Gräzismen, dans Syntactica. Studien und Beiträge zur historischen Syntax des Lateins II, Lund 1933, 406-457 NELSON H.L.W., Überlieferung, Aufbau und Stil von Gai Institutiones (Studia Gaiana, 6), Leiden 1981, ROSÉN H.-D. SHLEV, QUASI: Its Grecizing [?] syntactic patterns, Colloque de Linguistique latine de Toulouse (sous presse). SCHRIJNEN J.-CHR. MOHRMANN, Studien zur Sprache der Briefe des hl. Cyprian, 2 vol., Nijmegen 1934 [less ▲]

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See detailPopular Candidates and/or Party Soldiers? The Interactive Effect of Candidates’ Vote-Earning Capacity and the Candidate-Party Congruence at the 2014 Belgium Elections
Dodeigne, Jérémy ULg; Meulewaeter, Conrad

Conference (2017, April 25)

Political parties need to act as unitary actors in parliaments to implement their policy goals. The literature has acknowledged that candidate selection process is one of the most powerful tools for a ... [more ▼]

Political parties need to act as unitary actors in parliaments to implement their policy goals. The literature has acknowledged that candidate selection process is one of the most powerful tools for a party to achieve and maintain internal cohesion within the parliamentary group. Political parties that do not win election cannot develop their policy goals though. Candidate selection processes present thus two – potentially conflicting – objectives: vote-seeking strategy (recruiting ‘popular candidates’) and policy-seeking strategy (enlisting ‘party soldiers’). The personalization of politics, where electoral campaigns are increasingly personal while eroding the role of issues and ideology in voting behaviour, enhances the tensions between parties’ vote-seeking and policy-seeking strategies. According to some scholars, the former even prevails over the other which causes critical consequences for the functioning of parties in legislature and the broader democratic political systems. However, in line with more recent development in the literature, we argue that personalization is not necessarily a zero-sum game: political parties can balance tickets using both strategies. In that configuration, one strategy interacts with the other, rather than prevail over the other. Using an innovative and consistent measurement of candidate-party congruence, we test this interaction on the recruitment of candidates at the 2014 Belgian elections. Overall, our results prove that vote-seeking strategy matters but heavily depends on policy-seeking strategy. It demonstrates that parties use both strategies as a trade-off to balance their lists, even though vote-seeking strategy ultimately prevails for a substantial number of candidates studied. The results call for a more positive normative account of the personalization thesis. The later has the potential to keep voters, candidates and parties connected in the representation process. [less ▲]

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See detailMultiple Semantic Priming and Latin Sequential Collocations : when Text Linguistics and Language Learning meet Cognitive Psychology
Lavigne, Frederic; Longrée, Dominique ULg; Mellet, Sylvie

Conference (2017, April 25)

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See detailLa revue L’Ossature métallique et le débat de l’architecture dans l’entre-deux- guerres
Charlier, Sébastien ULg

Conference (2017, April 25)

Publiée à Bruxelles dès 1932, L’Ossature métallique est éditée par le Centre belgo-luxembourgeois d’information de l’acier pour faire face à la crise économique qui frappe durement l’industrie ... [more ▼]

Publiée à Bruxelles dès 1932, L’Ossature métallique est éditée par le Centre belgo-luxembourgeois d’information de l’acier pour faire face à la crise économique qui frappe durement l’industrie sidérurgique belge depuis 1929. Le mensuel traduit la volonté de l’industrie de disposer d’un organe d’information puissant relayant les dernières nouveautés en matière de constructions en acier. La revue se destine d’abord aux ingénieurs et propose de nombreuses études techniques (théories, calculs, essais) et des articles sur le rôle du métal dans le génie civil ou dans les moyens de transports (voitures de chemin de fer, locomotives, bateaux…). Très vite, L’Ossature métallique prend conscience des nouveaux marchés à toucher et prend pied dans le champ de l’architecture en proposant des articles sur des bâtiments à structure métallique. Puisant d’abord ses articles dans la presse internationale, la revue peut bientôt compter sur des articles originaux témoignant d’un réseau d’auteurs étendus et aux profils variés. Après avoir situé l’organe dans le fascinant bouillonnement des revues d’architecture de l’entre-deux-guerres, l’exposé montrera, à travers une sélection d’articles traitant en priorité de réalisations situées en Wallonie, de la variété des sujets traités par L’Ossature métallique. De la petite maison individuelle à l’immeuble à appartements en passant par les infrastructures publiques ou les bâtiments industriels, l’exposé proposera quelques expressions de l’architecture métallique en Belgique. [less ▲]

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See detailOn a conjecture about regularity and l-abelian complexity
Vandomme, Elise ULg

Conference (2017, April 25)

A natural generalization of automatic sequences over an infinite alphabet is given by the notion of k-regular sequences, introduced by Allouche and Shallit in 1992. The k-regularity of a sequence provides ... [more ▼]

A natural generalization of automatic sequences over an infinite alphabet is given by the notion of k-regular sequences, introduced by Allouche and Shallit in 1992. The k-regularity of a sequence provides us with structural information about how the different terms are related to each other. We show that a sequence satisfying a certain symmetry property is 2-regular. We apply this theorem to develop a general approach for studying the l-abelian complexity of 2-automatic sequences. In particular, we prove that the period-doubling word and the Thue–Morse word have 2-abelian complexity sequences that are 2-regular. The computation and arguments leading to these results fit into a quite general scheme that can be used to obtain additional regularity results. This supports the conjecture that the l-abelian complexity of a $k$-automatic sequence is a k-regular sequence. [less ▲]

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See detailPredicting gully densities at sub-continental scales: a case study for the Horn of Africa
Vanmaercke, Matthias ULg; Pelckmans, Ignace; Poesen, Jean

Conference (2017, April 25)

Gully erosion is a major cause of land degradation in many regions, due to its negative impacts on catchment hydrology, its associated losses of land and damage to infrastructure, as well as its often ... [more ▼]

Gully erosion is a major cause of land degradation in many regions, due to its negative impacts on catchment hydrology, its associated losses of land and damage to infrastructure, as well as its often major contributions to catchment sediment yields. Mitigation and prevention of gully erosion requires a good knowledge of its spatial patterns and controlling factors. However, our ability to simulate or predict this process remains currently very limited. This is especially the case for the regional scale. Whereas detailed case studies have provided important insights into the drivers of gully erosion at local scales, these findings are often difficult to upscale to larger regions. Here we utilized a simple and cheap method to predict patterns of gully density at the sub-continental scale. By means of a random sampling procedure, we mapped gully densities for over sixty study sites across the Horn of Africa, using freely available Google Earth imagery. Next, we statistically analyzed which factors best explained the observed variation in mapped gully density. Based on these findings, we constructed a multiple regression model that simulates gully density, based on topography (average slope), soil characteristics (percentage silt) and land use (NDVI-value). Although our model could benefit from further refinement, it succeeds already fairly well in simulating the patterns of gully density at sub-continental scales. Over 75% of the predicted gully densities differ less than 5% from the observed gully density, while over 90% of the predictions deviate less than 10%. Exploration of our results further showed that this methodology may be highly useful to quantify total gully erosion rates at regional and continental scales as well as the contribution of gully erosion to catchment sediment yields. [less ▲]

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See detailTo be plastic is fantastic: delineate coral species niches for assessing their tolerance to changes
Denis, Vianney; Sturaro, Nicolas ULg; Yang, Shan-Hua et al

Conference (2017, April 24)

Climatic and anthropogenic disturbances alter coral reefs by reconfiguring existing coral assemblages. Surviving species are selected by the new environment based on particular traits that they may ... [more ▼]

Climatic and anthropogenic disturbances alter coral reefs by reconfiguring existing coral assemblages. Surviving species are selected by the new environment based on particular traits that they may exhibit. The plasticity in traits will define ecological strategies associated with contrasted degrees of tolerance to changes. In this process, specialists are expected to tolerate few changes to the environmental conditions and are restricted to specific habitat. To contrast, generalists can cope with a wider range of environmental conditions by readjusting traits according to the habitat’s features. Ecological strategies in corals have been exclusively defined according to species’ trait averages, irrespective of individual variations. Challenges representing the acquisition and use of energy have also tended to be oversimplified, specifically by the choice of easy traits in the absence of strong scientific evidence. Here, we propose a framework to re-examine strategies in scleractinian corals by focusing on the intraspecific variation of traits. We will show how the characteristics of a given species niche can help coral species to tolerate changes, illustrating this approach with examples taken from high-latitude locations and mesophotic coral ecosystems. We will demonstrate that multidisciplinary approach focusing on three major characteristics of the coral holobiont (its physiology, trophic ecology, and associated micriobiome), we can enhance the comprehension of ecological plasticity of coral species and predict future ecosystem reconfiguration. [less ▲]

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See detailDetermining RUSLE P-factors for stonebunds and trenches in rangeland and cropland, Northern Ethiopia
Taye, Gebeyehu; Poesen, Jean; Vanmaercke, Matthias ULg et al

Conference (2017, April 24)

The implementation of soil and water conservation (SWC) measures in the Ethiopian highlands is a top priority to reduce soil erosion rates and to enhance the sustainability of agroecosystem. Nonetheless ... [more ▼]

The implementation of soil and water conservation (SWC) measures in the Ethiopian highlands is a top priority to reduce soil erosion rates and to enhance the sustainability of agroecosystem. Nonetheless, the effectiveness of many of these measures for different hillslope and land use conditions remains currently poorly understood. As a result, the overall effects of these measures at regional or catchment scale remain hard to quantify. This study addresses this knowledge gap by determining the cover-management (C) and support practice (P) factors of the Revised Universal Soil Loss Equation (RUSLE), for commonly used SWC measures in semi-arid environments (i.e. stone bunds, trenches and a combination of both). Calculations were based on soil loss data collected with runoff plots in Tigray, northern Ethiopia (i.e. 21 runoff plots of 600 to 1000 m2 , monitored during 2010, 2011 and 2012). The runoff plots were installed in rangeland and cropland sites corresponding to a gentle (5%), medium (12%) and steep (16%) slope gradients. The C and P factors of the RUSLE were calculated following the recommended standard procedures. Results show that the C-factor for rangeland ranges from 0.31 to 0.98 and from 0.06 to 0.39 for cropland. For rangeland, this large variability is due to variations in vegetation cover caused by grazing. In cropland, C-factors vary with tillage practices and crop types. The calculated P-factors ranged from 0.32 to 0.74 for stone bunds, from 0.07 to 0.65 for trenches and from 0.03 to 0.22 for a combination of both stone bunds and trenches. This variability is partly due to variations in the density of the implemented measures in relation to land use (cropland vs rangeland) and slope angles. However, also annual variations in P factor values are highly significant. Especially trenches showed a very significant decline of effectiveness over time, which is attributable to their reduced static storage capacity as a result of sediment deposition (e.g. for trenches in rangeland: 0.07-0.13 in 2010 to 0.37-0.65 in 2012). Hence, the results of this work may not only help in better modelling and quantifying the average long-term impacts of SWC measures over larger areas, but also show the importance of considering temporal variations of the effectiveness of SWC measures. [less ▲]

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See detailLymphatic vasculature requires estrogen receptor alpha signaling to protect from lymphedema
Morfoisse, Florent ULg

Conference (2017, April 24)

Rationale: Estrogen play a crucial role on the cardiovascular system and, particularly, on the vascular endothelium. However, the effect of estrogen on the lymphatic system has been poorly investigated ... [more ▼]

Rationale: Estrogen play a crucial role on the cardiovascular system and, particularly, on the vascular endothelium. However, the effect of estrogen on the lymphatic system has been poorly investigated. Objective: We aimed to demonstrate the protective effect of the 17 estradiol (E2), the most potent endogenous estrogen in lymphedema, a lymphatic dysfunction, which results in a massive fluid and fat accumulation. Methods and Results: Immunohistochemistry revealed that high doses of E2 modified skin microenvironment and stimulated lymphangiogenesis. E2 activates lymphatic endothelium through a transcriptional activation induced by its receptor ER. Using an original model of secondary lymphedema, we found a protective effect of E2 that prevents limb swelling. Loss of ER function using selective estrogen modulator (SERM) and in Tie2 Cre(+); ER-/- mice lead to a disruption of the lymphatic network promoting lymphedema. This effect was associated with a remodeling of LEC, an inhibition of gene expression, and ERK, but not AKT E2-induced phosphorylation. Conclusion: These findings reveal a new facet of the influence of estrogens in the management of the lymphatic system in pathological condition and provides more evidences that secondary lymphedema is not only a side effect of surgery, but is worsen by hormone therapy. [less ▲]

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See detailGeomorphic and Hydrological challenges in Africa: implications for soil and water conservation
Vanmaercke, Matthias ULg; Poesen, Jean

Conference (2017, April 24)

Expected scenarios of climate change and population growth confront Africa with various important challenges related to food, water and energy security. Many of these challenges are closely linked to the ... [more ▼]

Expected scenarios of climate change and population growth confront Africa with various important challenges related to food, water and energy security. Many of these challenges are closely linked to the impacts of soil erosion and other geomorphic processes, such as reduced crop yields, sedimentation of reservoirs and reduced freshwater quality. Despite the urgency and extent of many of these challenges, the causes and dynamics of these processes and their impacts remain severely understudied. This becomes apparent when the availability of e.g. soil erosion and catchment sediment export measurements for Africa is compared to that of other continents. Nonetheless, a substantial amount of geomorphic research has been conducted in Africa. Many of this work dates back from several decades ago, and were often only reported in ‘gray literature’ (e.g. internal reports). Here we present an overview of our current state of knowledge on soil erosion and its implications in Africa. We discuss which geomorphic process rate measurements are currently available and what can be learned from these with respect to the challenged raised above. We especially focus on our current understanding about the effectiveness of soil and water conservation techniques at various spatial and temporal scales. Based on specific case-studies (e.g. in Ethiopia and Uganda) and a meta-analysis of previous work, we highlight some research gaps, research needs and research opportunities when aiming to use Africa’s soil and water resources sustainably and efficiently [less ▲]

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See detailCancer associated fibroblast-derived integrin α11 regulates PDGFRβ signaling to promote breast cancer progression
Primac, Irina ULg; Blacher, Silvia ULg; cimino, Jonathan et al

Conference (2017, April 24)

CAF-specific proteins can provide important prognostic markers and targets for anticancer drugs. Recently, integrin α11 (ITGA11) emerged as a new biomarker of CAFs. ITGA11 is mainly expressed by ... [more ▼]

CAF-specific proteins can provide important prognostic markers and targets for anticancer drugs. Recently, integrin α11 (ITGA11) emerged as a new biomarker of CAFs. ITGA11 is mainly expressed by mesenchymal cells and is correlated with fibroblast activation and matrix reorganization. While the role of ITGA11 in wound healing has been well described, only a very limited number of reports have assessed its role in the cancer disease. This research project aims to investigate the role of stromal ITGA11 in breast cancer. To analyze the in vivo effects of ITGA11 on tumor insurgence, growth and metastasis, we crossed the oncogenic MMTv-PyMT mice with the ITGA11 KO/WT mice, which develop spontaneously breast tumors. ITGA11 deletion strongly delayed tumor growth and metastasis in PyMT mouse model. ITGA11 was poorly expressed at early stages of the tumor progression and its expression was strongly increased in the late stage invasive carcinomas. Importantly, a reduced angiogenesis and collagen content was observed in tumors lacking of ITGA11. Furthermore, a strong co-localization between ITGA11 and PDGFRb, but not other CAF markers such as alpha smooth actin, was also observed within the tumor stroma, suggesting that ITGA11 defines a subpopulation of CAFs, which is not represented by myofibroblasts, but rather PDGFRb+ CAFs. For mechanistic investigation, CAFs and breast cancer cells were isolated from the PyMT model. ITGA11 co-immunoprecipitated with PDGFRb in the isolated CAFs and regulated its phosphorylation. Interestingly, ITGA11-deficient CAFs failed to promote CAF and cancer cell invasion, in contrast to WT CAFs in a spheroid invasion assay. A high throughput comparative proteomics analysis on CAF spheroids in 3D a system was next performed. Proteomics data identified several proteins with relevance in the cancer disease which were significantly modulated in CAFs through ITGA11 down-regulation. The top-ranking candidates are under validation and molecular pathways, which may link these targets and ITGA11 will be further analyzed in the in vitro models. Overall, these in vivo and in vitro data show that ITGA11 defines a PDGFRβ+ subpopulation of CAFs distinct from α-SMA+ myofibroblasts that promote tumor cell invasion and angiogenesis at late stages of carcinoma evolution. ITGA11 is a promising target within the stroma of breast cancer and further investigations of its molecular signaling pathways will be of great relevance. [less ▲]

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See detailAvatars et actualité de la phénoménotechnique
Pieron, Julien ULg

Conference (2017, April 24)

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See detailCharacterizing root system characteristics with Electrical resistivity Tomography: a virtual rhizotron simulation
Rao, Sathyanarayan; Ehosioke, Solomon ULg; Lesparre, Nolwenn et al

Conference (2017, April 24)

Electrical Resistivity Tomography (ERT) is more and more used for monitoring soil water content in a cropped soil. Yet, the impact of roots on the signal is often neglected and a topic of controversy. In ... [more ▼]

Electrical Resistivity Tomography (ERT) is more and more used for monitoring soil water content in a cropped soil. Yet, the impact of roots on the signal is often neglected and a topic of controversy. In several studies related to soil-root system, it has been showed that the measured root mass density statistically correlates with the electrical conductivity (EC) data obtained from ERT. In addition, some studies suggest that some roots are more electrically conductive than soil for most water content. Thus, higher EC of roots suggest that it might have a measurable impact on ERT signals. In this work, virtual rhizotrons are simulated using the software package called R-SWMS that solves water and solute transport in plant root-soil system, including root growth. The distribution of water content obtained from R-SWMS simulation is converted into EC data using pedo-physical models. The electrical properties of roots and rhizosphere are explicitly included in the EC data to form a conductivity map (CM) with a very detailed spatial resolution. Forward ERT simulations is then carried out for CM generated for various root architectures and soil conditions to study the impact of roots on ERT forward (current and voltage patterns) and inverse solutions. It is demonstrated that under typical injection schemes with lateral electrodes, root system is hardly measurable. However, it is showed that adding electrodes and constraints on the ERT inversion based on root architecture help quantifying root system mass and extent. [less ▲]

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See detailEpithelial lining fluid penetration of temocillin administered by continuous infusion in critically ill patients with nosocomial pneumonia
VISEE, Clotilde ULg; LAYIOS, Nathalie ULg; MISTRETTA, Virginie ULg et al

Conference (2017, April 23)

The administration of 6g per day of temocillin by continuous infusion in critically patients with severe nosocomial pneumonia allows a penetration ratio, measured by the ELF/plasma ratio of AUCs, of 0.14 ... [more ▼]

The administration of 6g per day of temocillin by continuous infusion in critically patients with severe nosocomial pneumonia allows a penetration ratio, measured by the ELF/plasma ratio of AUCs, of 0.14 and 0.57 and a mean (± SE) ELF concentration , in mg/L, of 9.8 ± 1.3 and 9.8 ± 1.6 for total and free drug, respectively. Standard error of AUCs should be calculated by the Bootstrap method and Monte Carlo simulations should be performed for subsequent PK/PD analysis. [less ▲]

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See detailEtude des traitements numériques de base dans le syndrome 22q11: Impact des troubles visuo-spatiaux
Attout, Lucie ULg; Noël, Marie-Pascale; Vossius, Line ULg et al

Conference (2017, April 22)

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See detail3D investigation into the bust of Akhenaten in the Louvre Museum
Laboury, Dimitri ULg; Mulliez, Maud

Conference (2017, April 22)

Purchased in 1905 by G. Bénédite from the Antiquity market, the unprovenanced limestone bust of Akhenaten now kept in the Louvre Museum (under the inventory number E 11076) is world-famous but, in the end ... [more ▼]

Purchased in 1905 by G. Bénédite from the Antiquity market, the unprovenanced limestone bust of Akhenaten now kept in the Louvre Museum (under the inventory number E 11076) is world-famous but, in the end, rather poorly studied. In the context of an international research project entitled RetroColor 3D (funded by the Région Nouvelle Aquitaine, France, and the University of Bordeaux Montaigne, at Archeovision - UMS 3657 of the CNRS), this exceptional piece of sculpture was investigated anew with the help of 3D reconstruction as a methodological tool. Reporting on this transdisciplinary analysis, the paper will explain how this led to a better understanding of the bust’s original function in the creation of royal portraiture during the so-called Amarna period. [less ▲]

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See detailAnalyse spatiale intrasite basée sur un Système d'Information Géographique et appliquée aux vastes sites de plein air du Paléolithique moyen en France septentrionale. L’Exemple de Caours (Somme, France).
Moreau, Gwénaëlle ULg; Locht, Jean-Luc

Conference (2017, April 21)

Durant le Paléolithique moyen, l’alternance entre les périodes glaciaire et interglaciaire a rendu le peuplement de la France septentrionale discontinu. Cette région bénéficie d’un bon cadre ... [more ▼]

Durant le Paléolithique moyen, l’alternance entre les périodes glaciaire et interglaciaire a rendu le peuplement de la France septentrionale discontinu. Cette région bénéficie d’un bon cadre chronostratigraphique permettant l’étude des peuplements néandertaliens. Cependant certains aspects de leurs comportements restent encore mal caractérisés, particulièrement la fonction des sites reste souvent à préciser. L’étude de l’organisation spatiale intrasite apporte des éléments de réponse à ces questions. La fouille d’un site du Paléolithique moyen ne met pas directement en évidence l’organisation spatiale des lieux de vie, une modélisation est nécessaire pour la déceler. Nous avons donc débuté la construction d’un protocole d’analyse spatiale basé sur un Système d’Information Géographique et appuyé sur les sites de Caours. Ce site possède un rôle majeur de par sa superficie et l’excellente préservation des restes fauniques. Nous montrons ici l’existence d’une organisation spatiale sous forme de zones de concentration de vestiges en corrélant plusieurs méthodes – parmi lesquelles le K-mean Clustering et la Kernel Density Estimation. Nous préciserons ensuite la fonction de ces zones au sein d’un espace de vie et leur interaction entre elles au travers de la distribution spatiale des différents vestiges fauniques ou lithiques. [less ▲]

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See detailDealing with Alexithymia in a Day Psychiatric Hospital - A study identifying significant modulators to promote recovery
Nasello, Julian ULg; Servais, Catherine; Close, Mireille et al

Conference (2017, April 21)

Objective: in this research, we studied changings and modulations of alexithymia [defined by Difficulties in Identifying Feelings (DIF); in Discussing Feelings (DDF) and by an Externally-Oriented Thinking ... [more ▼]

Objective: in this research, we studied changings and modulations of alexithymia [defined by Difficulties in Identifying Feelings (DIF); in Discussing Feelings (DDF) and by an Externally-Oriented Thinking (EOT)]. The purpose was to investigate if Day Psychiatric Hospitalization (DPH) could promote significant improvements on difficulties linked to alexithymia in a population of mood disorders patients (N = 73). Methods & results: a first study showed significant reductions of alexithymia scores. Considered as a personality trait, alexithymia’s changings lead us to promote the relative stability hypothesis, by displaying that moderate to high correlational levels were achieved. A second study revealed the variables impacting significantly on alexithymia. The selected variables were: demographic (i.e. gender; age; number of days of treatment); MMPI-2 variables; and perceived social support (assessed with the MSPSS scale). We found notably a positive effect of perceived social support (PSS) that reduced difficulties associated to alexithymia and other variables that increased alexithymia levels (e.g. antisocial practices, negative attitude to treatment). Conclusion: positive effects of PSS are well known and two main hypotheses were already proposed to explain its effect: PSS acting directly or as a buffer on stressful events. In conclusion, at the one hand, we showed that it is possible to significantly decrease at a certain level a phenomenon such as alexithymia. At the other hand, we enlightened significant modulators of alexithymia that might help therapists to promote or avoid specific aspects for patients involved in a recovery process. [less ▲]

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See detailNon-invasive analysis of mural paintings from a late-Republican house in Ostia
Strivay, David ULg; Morard, Thomas ULg; Herens, Elodie ULg et al

Conference (2017, April 21)

This paper is a comprehensive analytical study of the murals belonging to an ancient Roman house through the characterization of materials. The project focuses on the wall paintings of the Domus dei ... [more ▼]

This paper is a comprehensive analytical study of the murals belonging to an ancient Roman house through the characterization of materials. The project focuses on the wall paintings of the Domus dei Bucrani - a house of the end of the Republican era discovered on the site of the Schola del Traiano in Ostia. This domus has undergone several phases of development in the 1st century BC before being destroyed around 20 BC. A new house was immediately rebuilt after a major change from the ground, which allowed exceptional preservation of the decoration system. The results complement our knowledge of Roman painting techniques during the 1st century BC and also provide a comprehensive multidisciplinary approach to the problem of conservation of wall paintings. These two related objectives have been studied using non-destructive testing methods (MA-XRF, FTIR and Raman spectroscopy). The analyses have been performed in situ using our mobile systems. The different set-ups had to be modified in order to be able to work on horizontal surfaces, specially our XRF scanner. The study of the pictorial layers address various issues in the field of archaeology: what technique has been implemented? Does the same technique was used in both phases of the development of the domus? Do they correspond to the techniques described by ancient writers? These responses are compared to those observed in other sets of murals dating from the 1st century BC. [less ▲]

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See detailPour une psychopathologie éthologique et criminologique : l’apport croisé de Debuyst et Demaret
Englebert, Jérôme ULg; Adam, Christophe

Conference (2017, April 20)

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See detailExpanding chemistry's horizon with continuous-flow reactors - part II
Monbaliu, Jean-Christophe ULg

Conference (2017, April 20)

Continuous-flow micro- and mesofluidic reactors come with inherent properties that can be advantageously utilized for expanding the horizon of synthetic organic chemistry. Accurate control over local ... [more ▼]

Continuous-flow micro- and mesofluidic reactors come with inherent properties that can be advantageously utilized for expanding the horizon of synthetic organic chemistry. Accurate control over local process parameters, even under extreme conditions, inherent safety, production homogeneity and seamless scale-up are amongst the most important assets of continuous-flow chemistry. Besides, flow chemistry enables the design of efficient multistep processes with significantly reduced footprints. In this lecture, we will discuss some of the most fascinating aspects of continuous-flow micro- and mesofluidic reactors in the specific context of preparative organic chemistry. Multiple examples illustrating the development and implementation of continuous-flow multistep strategies for the synthesis of high-value added organic targets will be presented. [less ▲]

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See detailUS (Post-)Pastoral Non-Fiction and the Toxic Sublime
Lombard, David ULg

Conference (2017, April 20)

As Frank O’Hara mentions, “[i]n past times there was nature and there was human nature; because of the ferocity of modern life, man and nature have become one” (1971). However, this statement is wrong as ... [more ▼]

As Frank O’Hara mentions, “[i]n past times there was nature and there was human nature; because of the ferocity of modern life, man and nature have become one” (1971). However, this statement is wrong as nature has, in fact, never been ‘neutral’, independent of human influence but has instead always been depicted and defined by humans. In the age of the Anthropocene, numerous are the ways of reconsidering our relationship with our physical environment and reframing the pastoral mode so that it would best illustrate the interconnectedness between the human and the non-human. For example, Joshua Corey recently proposed an analysis of “postmodern pastoral poetry” in order to “enter this [very] zone of the pastoral”, meaning “the vision of humanity undivided from nature” (2012). Nevertheless, Corey is himself with several other famous literary critics, or more specifically ecocritics, “part of this [ ] movement that seeks to define a pastoral that has avoided the traps of idealisation [or pastoral sentimentalism] in seeking a discourse that can both celebrate and take some responsibility for nature without false consciousness” or, in other words, a more ecocentric repossession of pastoral that Terry Gifford defines as “post-pastoral”. In this paper, my purpose is to analyse US post-pastoral non-fiction, mainly memoirs and essays that include a pastoral retreat in the natural landscape, to demonstrate the importance of relating humans to the natural landscape but also to the technological and toxic landscapes. In order to do so, I intend to use the concept of the toxic sublime and to revalue it as a new perspective in the study of the relationship between American literature and our physical environment. [less ▲]

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