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See detailReal-time capture of the folding-unfolding transitions in a single oligorotaxane foldamer
Sluysmans, Damien ULg; Hubert, Sandrine ULg; Bruns, Carson et al

Poster (2016, October 13)

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See detailNovel promising way to synthesize non-isocyanate polyurethanes (NIPUs) for innovative coating applications against corrosion protection of metal surfaces
Panchireddy, Satyannarayana ULg; Grignard, Bruno ULg; Thomassin, Jean-Michel ULg et al

Poster (2016, October 13)

Polyurethanes (PUs) are one of the most widely used polymeric materials with applications in automotive, as sealants, adhesives, decorative, aircraft topcoats, for coatings or as foams for thermal and/or ... [more ▼]

Polyurethanes (PUs) are one of the most widely used polymeric materials with applications in automotive, as sealants, adhesives, decorative, aircraft topcoats, for coatings or as foams for thermal and/or acoustic insulation. Industrially, PUs are produced by copolymerization between polyols and polyisocyanates. Because of the toxicity issues related to the use of isocyanates, there is a need to develop greener and safer route to produce such polymers. This study reports on the synthesis of new sustainable isocyanates-free PU (NIPU) coatings for aluminium anticorrosion. In a first step, bio- and CO2-sourced cyclic carbonates monomers were synthesized by coupling of epoxydized vegetable oils with CO2 using a new efficient bicomponent organocatalyst. In second step formulations including cyclic carbonates/amines/additives were optimized to produce highly adhesive cross-linked NIPU coatings that show good resistance against solvents and long-term barriers preventing the corrosion of the aluminiumsubstrate [less ▲]

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See detailSynthesis and characterization of non-isocyanate polyurethane (NIPU) hydrogels
Gennen, Sandro ULg; Grignard, Bruno ULg; Thomassin, Jean-Michel ULg et al

Poster (2016, October 13)

Due to its good biocompatibility, biodegradation and excellent mechanical properties, polyurethane (PU) is a material of choice for biomedical applications (gloves, tubing, artificial membranes…) and, as ... [more ▼]

Due to its good biocompatibility, biodegradation and excellent mechanical properties, polyurethane (PU) is a material of choice for biomedical applications (gloves, tubing, artificial membranes…) and, as hydrogels, it was used as wound dressing, soft contact lenses, drug delivery systems and scaffolds for tissue engineering. Classically, PU are synthesized by a step-growth polymerization between poly (di-)ols and poly (di-) isocyanates. Due to the toxicity of isocyanates, REACH regulations have changed and, today, there is a need to develop greener and safer route to produce isocyanate-free PUs. This contribution focus on the synthesis of NIPU hydrogels by copolymerizing a bifunctional CO2-sourced hydrophilic PEG bi-cyclic carbonate with diamines in presence of a cross- linker. The PEG bi-cyclic carbonates was prepared via a CO2/epoxide coupling reactions using a new efficient organocatalytic system based on the use of an ammonium salt (TBAI) in combination with a fluorinated alcohol. [less ▲]

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See detailCurating Canons of Comics: Daniel Clowes and Art Spiegelman's 'Private' Museums
Crucifix, Benoît ULg

Conference (2016, October 13)

As guest of honor at the 2012 International Comics Festival in Angoulême, Art Spiegelman did not only have a retrospective exhibition devoted to his work, but was also invited to act as the curator of the ... [more ▼]

As guest of honor at the 2012 International Comics Festival in Angoulême, Art Spiegelman did not only have a retrospective exhibition devoted to his work, but was also invited to act as the curator of the CIBDI museum’s archive, producing his own ‘private’ museum, as suggested by the exhibition title Le Musée privée d’Art Spiegelman. Similarly, for Daniel Clowes’s retrospective exhibit in Columbus, the Wexner Center of the Arts hosted Eye of the Cartoonist: Daniel Clowes’s Selections from Comics History, based on Clowes’s curatorial choices from the Billy Ireland Cartoon Library and Museum. In each case, the cartoonist literally frames the history of comics and exhibits his personal canon of comics. As Spiegelman put it: “I have been allowed to highjack the Centre of Bande dessinée Museum to replace what is primarily the Francophone patrimony of comics with my own perverse and private map of what comics are.” This quote clearly embodies the dual facet of such exhibitions – collective and singular, shared and idiosyncratic – foregrounding the anchorage of individual graphic novelists within traditions of comics. Articulated around personal canons, these two exhibitions offer fresh perspectives to think about canonization in the comics world. Albeit focused on two 'canonized' graphic novelists, this case study nuances the auteurism of comics scholarship: not only are these exhibitions the result of collaborative work, they also recast the author in the role of curator. The key aspect of these exhibitions lies in a canonizing act of selection that circulates in varied material forms showcasing the authors’ influences. Mapping out how Clowes and Spiegelman frame their entanglement with the past of comics within the contexts of institutions that store its archive, I will examine the specificities of these exhibitions in relation to a body and style of historiography I call ‘authors’ histories of the comics.’ [less ▲]

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See detailMigration in Extreme Climate Change Scenarios
Gemenne, François ULg; Blocher, Julia; de Longueville, Florence et al

Conference (2016, October 12)

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See detailWalking droplets in confined geometries
Filoux, Boris ULg; Hubert, Maxime ULg; Schlagheck, Peter ULg et al

Poster (2016, October 12)

When gently placing a droplet onto a vertically vibrated bath, under specific conditions, coalescence may be avoided. The drop bounces permanently. Upon increasing the forcing acceleration, the drop ... [more ▼]

When gently placing a droplet onto a vertically vibrated bath, under specific conditions, coalescence may be avoided. The drop bounces permanently. Upon increasing the forcing acceleration, the drop interacts with the wave it generates, and becomes a walker [1,2]. Recently, some 2D confining systems for walking droplets have been developed: cylindrical cavity, harmonic potential or the use of Coriolis force [3,4]. In addition, the interactions between two identical walkers have been studied in a 2D case [5]. Nevertheless, no study focuses on 1D dynamics and their properties. In this work, we show it is possible to confine a walker in a quasi mono-dimensional geometry by using a submerged annular cavity. We focus on the interactions between droplets, and show the interdistance quantization. Then, we study the speed of pairs of walkers and show that the distance between the drops affects the group speed: the closer the drops are, the faster they move. We also propose a numerical model to characterize the distance quantization, and the evolution of the speed of a string of droplets. Finally, we investigate the case of a string of droplets. We discuss the influence of the number of droplets and the distance between droplets on the string speed. 1. Y. Couder, S. Protière, E. Fort, and A. Boudaoud, Nature 437, 208 (2005).
 2. S. Protière, A. Boudaoud, and Y. Couder, J. Fluid Mech. 554, 85 (2006).
 3. S. Perrard, M. Labousse, M. Miskin, E. Fort, and Y. Couder, Nat. Commun. 5, 3219 (2014).
 4. M. Labousse and S. Perrard, Phys. Rev. E 90, 022913 (2014).
 5. C. Borghesi, J. Moukhtar, M. Labousse, A. Eddi, E. Fort, and Y. Couder, Phys. Rev. E 90, 063017 (2014). [less ▲]

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See detailRibbons of superparamagnetic colloids
Darras, Alexis ULg; Fiscina, Jorge; Pakpour, Maryam et al

Poster (2016, October 12)

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See detailSemiochemicals to control wireworms
Verheggen, François ULg

Conference (2016, October 12)

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See detailLiège Game Lab Showcase
Dozo, Björn-Olav ULg

Conference (2016, October 11)

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See detailStudy of the volatile organic compounds in the interaction between banana plants and the fungal disease Fusarium oxysporum f.sp. cubense Tropical Race 4 (FocTR4)
Berhal, Chadi ULg; De Clerck, Caroline ULg; LEVICEK, CAROLINA et al

Conference (2016, October 11)

Banana fruit (Musa sp.) ranks fourth in term of worldwide production, and has economical and nutritional key values. Cavendish is the popular and most dominant variety of the dessert banana group ... [more ▼]

Banana fruit (Musa sp.) ranks fourth in term of worldwide production, and has economical and nutritional key values. Cavendish is the popular and most dominant variety of the dessert banana group. Nowadays, it is endangered by the emergent race of the Panama disease, caused by Fusarium oxysporum f.sp. cubense TR4 (Foc TR4). Despite the importance of the Volatile Organic Compounds (VOCs), which are secondary metabolites with a high vapour pressure, and their role in plant protection, they have never been documented as a way to manage this disease on Cavendish. Thus, the aim of this PhD thesis is to study the VOCs in the specific interaction Cavendish/Foc TR4, as a way to manage this threat. Based on the work previously done with other plants at Gembloux Agro-Bio Tech, a protocol was optimized for the extraction of the banana plant’s VOCs. In parallel, models of in-vitro and in-vivo inoculations are under development to distinguish the VOCs emitted by the root zone and those emitted by the aerial part of the plant. The results of the first analysis showed that the majority of the Cavendish VOCs belongs to the terpenes group, as well as ketones and an organic ester. The VOCs specifically emitted during the plant-pathogen interaction will be studied more in depth by evaluating their effect on the plant and the pathogen. At long term, and depending on the results, agro-ecological applications of this knowledge could include breeding for new variety or combining banana with other plants expressing VOCs against Foc TR4, applying VOCs on field to stimulate plant defences or to contain the pathogen. [less ▲]

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See detailRelative positioning with Galileo E5 AltBOC code measurements
Deprez, Cécile ULg; Warnant, René ULg

Conference (2016, October 11)

For over a decade, Europe has started to develop its own Global Navigation Satellite System (GNSS). Initiated in 1999, the Galileo project finally materialized a few years ago, recently experiencing a ... [more ▼]

For over a decade, Europe has started to develop its own Global Navigation Satellite System (GNSS). Initiated in 1999, the Galileo project finally materialized a few years ago, recently experiencing a prompt expansion with the launch, in 2015 and 2016, of 8 satellites belonging to the Full Operational Capability (FOC) generation. Broadcasting new signals, with new modulations, the first studies addressing this system reveal promising level of precisions on both code and carrier phase observables. Still in test phase but already available for measurements, this recent system can be used to estimate positions. Among the new signals developed by the Galileo program, the Galileo E5 AltBOC, also known as Galileo E5a+b or Galileo E5, reveals great characteristics. Thanks to its particular AltBOC modulation, it allows more precise code and phase observations besides being less affected by multipath. These innovative performances should lead to more precise position estimations than with any other signal presently in use. In this master thesis, we compared the positions estimated with GPS and Galileo on their different frequencies (L1, L2, L5 for GPS and E1, E5a, E5b and E5 AltBOC for Galileo). We combined the observations made by the receivers belonging to the University of Liège (2 Trimble NetR9 receivers, 1 Septentrio PolaRxS receiver and one Septentrio PolaRx4 receiver) in double differences (DD) combinations using various configurations (zero baseline (ZB), short baseline (SB) and medium baseline (MB)). It turns out that Galileo E5 AltBOC outperforms all other signal in terms of observation precision (estimated in a DD SB configuration in order to remove atmospheric and clock error sources affecting the signal). Regarding the precision obtained on the computed positions, we could reach a few decimetres with Galileo E5 code pseudoranges on baselines up to 25 kilometres. [less ▲]

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See detailTo Speak, or Not to Speak: That Is the Question. Contrapuntal Shakespearean Intertextuality in Gail Jones's Sorry
Belleflamme, Valérie-Anne ULg

Conference (2016, October 10)

In Alev Adil’s words, Australian novelist and essayist Gail Jones has chosen “to speak of silence, not of the silenced. [Her novel Sorry (2007)] is careful not to ventriloquize Aboriginal histories. The ... [more ▼]

In Alev Adil’s words, Australian novelist and essayist Gail Jones has chosen “to speak of silence, not of the silenced. [Her novel Sorry (2007)] is careful not to ventriloquize Aboriginal histories. The elegiac and occluded nature of [its] narrative is an ethical as much as aesthetic choice” (qtd. in Herrero 2011, 287). Ironically perhaps, the novel starts by immediately inviting the reader to be silent and to perk up his or her ears in order to listen to this story “that can only be told in a whisper” (3). This, I argue, functions as a kind of warning for readers, that throughout their reading they need to be attentive to, and perhaps search for, the hushed tone which this story demands and which suggests the existence of some deeper, underlying truth. In an article tackling the issue of writing and justice in the Australian context, Jones vindicates this form of obliquity, confessing that Sorry has “a political-allegorical aspect – as one would expect, claiming such a title”, yet that “it is not centrally concerned with representing the Stolen Generations. As a white Australian, it would be presumptuous to do so and it would risk appropriation of others’ painful experience” (2008, 84). She also contends that non-Indigenous writers who wish “to engage with ‘stolen’ matters must write from another perspective and perhaps use forms of indirection that will signal a refusal to ‘claim’ the experience of others” (79). Interacting with Russell West-Pavlov’s view of the Shakespearean intertext in Sorry as a “self-critical element of White usurping culture but also, possibly, as a collaborator in a coalition against the ongoing oppression of the Indigenous population which characterizes contemporary Australia” (2015, 391), my paper will examine how Jones exploits defamiliarizing techniques in order to undermine the dominant European discourse (as encoded in the Shakespearean text) without assuming an Aboriginal perspective. Her aim is to facilitate the emergence of an incipient, tentatively-defined counter-discourse sufficiently attuned to the specific realities of Australia. The paper argues that by adopting an Australian cultural perspective designed to decentre Shakespeare Jones hopes to reconcile history and writing, but also the divided aspects of White Australia’s twofold identity at a time of profound national changes. Works Cited Belleflamme, Valérie-Anne. 2015. “‘Shakespeare was wrong’: counter-discursive intertextuality in Gail Jones’s Sorry.” Journal of Postcolonial Writing 51 (6): 661-671. Herrero, Dolores. 2011. “The Australian Apology and Postcolonial Defamiliarization: Gail Jones’s Sorry.” Journal of Postcolonial Writing 47 (3): 283-295. Jones, Gail. 2007. Sorry. London: Harvill Secker. Jones, Gail. 2008. “Speaking Shadows: Justice and the Poetic.” In Just Words?: Australian Authors Writing for Justice, edited by Bernadette Brennan, 76-86. St Lucia: University of Queensland Press. West-Pavlov, Russell. 2015. “Shakekspeare Among the Nyoongar: Post-Colonial Texts, Colonial Intertexts and their Imbrications – Macbeth in Gail Jones’s Sorry.” Zeitschrift fur Anglistik und Amerikanistik 63 (4): 391-410. [less ▲]

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See detailCelestina, del personaje reubicado al mito
Francois, Jeromine ULg

Conference (2016, October 10)

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See detailMOSSBAUER SPECTROSCOPY AS A COMPLEMENTARY TECHNIQUE OF X-RAY DIFFRACTION TO INVESTIGATE ELECTRODE MATERIALS FOR ALKALI-ION BATTERIES
Mahmoud, Abdelfattah ULg; sougrati, Moulay Tahar; karegeya, claude et al

Poster (2016, October 09)

Lithium-ion batteries (LIBs) have been widely applied as a power source for portable electronics, stationary energy storage systems, and electric vehicles. Nevertheless, as lithium resources continue to ... [more ▼]

Lithium-ion batteries (LIBs) have been widely applied as a power source for portable electronics, stationary energy storage systems, and electric vehicles. Nevertheless, as lithium resources continue to decline worldwide and Li in the Earth’s crust is unevenly distributed as minor-metal. Na-ion batteries are considered to be an alternative to Li-ion batteries owing to the natural abundance of sodium. Indeed, Sodium-ion (Na-ion) batteries are expected to become part of the mix of technologies that will meet the challenges of energy storage. Electrode materials are the most important components in the operation and the performances of Alkali-ion batteries. New electrode materials are required to increase the energy density of Li/Na-ion batteries [1]. Fe based negative electrode materials for Li-ion batteries have been previously investigated to evaluate the electrochemical performances and elucidate the electrochemical reaction mechanisms. Mössbauer spectroscopy has been applied to a variety of fields including chemistry, physics, geology, biology…. In the domain of energy storage, Mössbauer spectroscopy has been used as a powerful tool to investigate the local electronic and structural properties of electrode materials and to determine their reaction mechanisms during charge and discharge of Li/Na-ion batteries [2]. In this poster, we will show from some selected examples how Mössbauer spectroscopy when used with X-ray diffraction can help to improve the performances of electrode materials for Alkali-ion batteries. References 1. Sougrati MT, Darwiche A, Liu X, Mahmoud A, Hermann RP, Jouen S, Monconduit L, Dronskowski R, Stievano L: Transition-metal carbodiimides as molecular negative electrode materials for lithium- and sodium-ion batteries with excellent cycling properties. Angew Chem Int Ed., 2016, 55: 5090-5095. 2. Brisbois, M., Caes, S., Sougrati, M. T., Vertruyen, B., Schrijnemakers, A., Cloots, R., Eshraghi, N., Hermann, R. P., Mahmoud, A., Boschini, F. Na2FePO4F/Multi-Walled Carbon Nanotubes for Lithium-Ion Batteries_ Operando Mössbauer Study of Spray- Dried Composites. Solar Energy Materials and Solar Cells 2016, 148, 67–72. Acknowledgment A. Mahmoud and F. Boschini would like to kindly thank Wallonie regions for the financial support. [less ▲]

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See detailPARTNERSHIP with a glass wool producer for accurate LCA
Gerbinet, Saïcha ULg; Briard, Vincent; Pigeolet, Jean-Pierre et al

Conference (2016, October 08)

This presentation aims to illustrate how a partnership with the private sector can progressively become a win-win collaboration. Taking into account the environmental aspects in the building sector has ... [more ▼]

This presentation aims to illustrate how a partnership with the private sector can progressively become a win-win collaboration. Taking into account the environmental aspects in the building sector has become unavoidable. Knauf Insulation, a glass wool producer, has started to evaluate the environmental impacts of it manufacturing processes for drafting Environmental Product Declarations (EPD). This first objective was mainly intended to respond to a market demand for EPDs of their products. Our first contact with Knauf Insulation was for drawing up EPDs of 10 of their products. This first work has shown the need for a more flexible tool to allow rapid life cycle analyze of a product and publication of an EPD, and thus respond quickly to market demands. The need of a better understanding of the environmental impact of the process is also underline to allow to follow the evolution of the impact and to reduce it. All the glass wool products are manufactured in a similar way, only a few parameters, such as density or thickness, are modified in the process to produce a given product. We have therefore chosen to develop a generic model that can be used for all glass wool products produced by Knauf Insulation, in any of their plants. The LCA model was developed in GaBi, and thanks to a positive collaboration with Thinkstep, the software editor, and Knauf Insulation, the model is finetuned for the production plants. Knauf Insulation can use this model for EPDs as well as for Ecoconception. The model is built to be user-friendly: the user sets the product characteristics and dimensions, and in which plant (or combination of plants) it is produced. The data collection is performed by Knauf Insulation with our support. When new data are available, the model is easily updated. Therefore the model is easy to use, easy to update and accurate. Thanks to this positive experience the collaboration is ongoing. The same modelling aspects have been adapted to another insulation product from Knauf Insulation, stone wool. Furthermore, Knauf Insulation has developed a new binder for its products called ECOSE and produced from renewable materials (biomass), and is formaldehyde-free. The previous LCA underline the need of a better characterization of ECOSE in a LCA perspective. Therefore, a PhD is underway to evaluate the impacts of this binder and its applications (glass wool products) as well as its future applications. This story underlines how the partnership between the university and private sector is a win-win situation, staring from EPD and leading to much needed fundamental research, more accurate EPDs and better awareness of the environmental impacts in general, when the private sector is convinced with the interest of the demarche. [less ▲]

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See detailAnorexie et régulation émotionnelle
Englebert, Jérôme ULg

Conference (2016, October 08)

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See detailImplication of Importin-8 in mouse brain development
Nganou, Gerry ULg; Denijs, Laurence; Lakaye, Bernard ULg et al

Poster (2016, October 08)

Regulation of nucleocytoplasmic transport of proteins by the karyopherin superfamily is critical for cell physiology as it controls mainy fundamental processes such as division, differenciation, migration ... [more ▼]

Regulation of nucleocytoplasmic transport of proteins by the karyopherin superfamily is critical for cell physiology as it controls mainy fundamental processes such as division, differenciation, migration, adaptation to external environment etc. Beside this fundamental role, ß1 and ß2 members of this superfamily are also implicated in mitosis and ciliary entry respectively. Importin-8 (IPO8), a member of the β-karyopherin family, is reported to control the transport Ago-2, c-Jun and Smad-4 for example, three proteins important for brain development. First, we have verify the subcellular localisation of IPO8 in HEK and hTert cells. No colocalisation with either the mitotic spindle or the primary cilia could be observed. So it seems IPO8 only plays a role in nuclear transport of proteins. Then we have assessed the expression of IPO8 in mouse brain by In Situ Hybridization at various embryonic (E12, E14, E18) and post natal age (P5, P60). A strong expression was observed during embryonic stages, and especially in the ventricular zone and the cortical plate of the cerebral cortex and the ganglionic eminences both at E14. Therefore, the implication of IPO8 in the radial migration has been assessed by in utero electroporation of shRNA at E14. Three days after IUE, we observed that neuroblast accumulates in the Intermediate zone (IZ) and do not reach the cortical plate (CP) in constrast to the control condition. This effect can be corrected by coexpressing a form of IPO8 that is not targeted by the shRNA, demonstrating the specificity of the effect. In conclusion, regarding its role in transport, IPO8 could modulate neurons migration in the developing brain and could be also at the origin of some diseases associated with neurons migration defects. [less ▲]

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See detailOccurence of the new variant of rabbit haemorrhagic disease virus (RHDV2) in wild populations of rabbits in Southern Belgium
Volpe, Rosario ULg; Lesenfants, Christophe ULg; Paternostre, Julien ULg et al

Poster (2016, October 07)

Rabbit haemorrhagic disease (RHD) is a highly infectious and fatal disease of the European rabbit (Oryctolagus cuniculus), responsible for important economic losses in the rabbit industry. The ... [more ▼]

Rabbit haemorrhagic disease (RHD) is a highly infectious and fatal disease of the European rabbit (Oryctolagus cuniculus), responsible for important economic losses in the rabbit industry. The aetiological agent of the disease is a RNA virus (RHDV, Lagovirus, Caliciviridae) first detected in China in 1984. Currently RHDV is endemic in most parts of Europe, Asia and North Africa. Phylogenetic analyses of RHDV strains have identified 3 distinct groups : the classic RHDV, the variant RHDVa and RHDV2. This latter has been detected in France for the first time in 2010 in domestic and wild rabbits (Le Gall-Reculé G et al., 2013) and since then has spread throughout Europe, replacing the circulating RHDV/RHDVa strains in most european countries. RHDV2 has already been detected in Belgium in rabbitries (Marlier D et al., 2014). Here, we report for the first time the presence of RHDV2 in wild rabbits in Southern Belgium. In november 2015, the Surveillance Network of Wildlife Diseases received seven dead wild rabbits for necropsy. The discovery of 7 fresh carcasses found at the same time in a same area (Hainaut province) emphasised the infectious or intoxication hypothesis as cause of death. Postmortem examinations were performed at the Faculty of Veterinary Medicine (FVM) of the University of Liege according to a systematic protocol based on gross lesions, histopathological and targeted microbiological analysis. For necropsy, each rabbit (1) was weighted and age was determined by the presence/absence of the distal ulna protuberance, (2) stomach was investigated to exclude poison, (3) spleen was systematically driven into Yersinia CIN culture media for detection of Yersinia pseudotuberculosis, (4) lungs and livers were systematically (a) packaged into 10% formaldehyde solution for histopathology analysis (Service of Pathology, FVM) and (b) frozen at -20°C for RHDV analysis (Scanelis Laboratory,Toulouse, France) and finally (6) feces were gathered for parasitology (Service of Parasitology, FVM). At necropsy, animals (5 adults: 3 males/2 females and 2 juveniles: 1 male/1 female) were in good condition. No hematomas or broken bones were detected, only one displayed clues of diarrhoea. Examinations of the carcasses showed congestion of lungs/kidneys and livers were macroscopically normal. No foreign body or suspicious particles was seen in the stomachs, only one rabbit was hardly infested by tapeworms in the gut. Histopathological examination revealed haemorragic lung lesions in one animal while 5 of them presented severe necrotic hepatitis, sometimes associated with peri-angiocholitis. Only one animal presented an abnormal high rate of coccidia in feces. Samples of livers were sent to Scanelis Laboratory for RHDV RT-qPCR diagnostic. The results were positive for the new variant RHDV2 in 5 out of the 7 rabbit livers. All the samples were negative for the classic RHDV. To determine if RHDV2 was already present before 2015 in wild rabbits in the region, we tested a series of livers that had been collected in 2013 and 2014 for a retrospective study. Among the 25 rabbit livers checked, 12 presented necrotic hepatitis and were sent for analysis. Ten were confirmed positive by RT-qPCR for RHDV2. [less ▲]

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See detailThe reinforcement opportunitie of a cross-border train connection: the example of the railway between Liège (Belgium) and Maastricht (Netherlands)
Wilmotte, Pierre-François ULg; Lambotte, Jean-Marc ULg; Cools, Mario ULg et al

Conference (2016, October 07)

The research topic was to understand why it is so difficult to increase the train frequency on Liège - Maastricht line. The outline of our presentation was structured in 4 parts : the (current, potential ... [more ▼]

The research topic was to understand why it is so difficult to increase the train frequency on Liège - Maastricht line. The outline of our presentation was structured in 4 parts : the (current, potential and future) supply, the (current, potential and future) demand, some options to solve the deadlock between the Belgian's and the Dutch's outlooks and the conclusions. [less ▲]

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See detailIntroduction
Masson, Christophe ULg

Conference (2016, October 07)

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See detailIrrigated food systems in Maradi Republic of Niger: A comparison between operating accounts
Andres, Ludovic ULg; Dambo, Lawali; Bode, Sambo et al

Conference (2016, October 07)

In Niger, most food systems are based on pluvial crops (millet, sorghum and cowpea). However, during the last decade, agricultural policy and technical and financial partners focused on increasing the ... [more ▼]

In Niger, most food systems are based on pluvial crops (millet, sorghum and cowpea). However, during the last decade, agricultural policy and technical and financial partners focused on increasing the productivity of irrigated food products. The region of Maradi, located in the Central-South of Niger, is an area traditionally dedicated to agriculture. Some parts of this region are particularly adapted for irrigation, especially the Goulbi of Kaba and the Goulbi of Maradi valleys. The goal of this study is to establish the socio-economic situation of the main irrigated food productions, based on the following indicators: (i) the crop management technics used; (ii) the results of the operating account; and (iii) the comparison between the village and the adoption of new technic (farmer field school). This paper is based on direct surveys conducted in three areas of the Maradi’s region: Soumarana (commune of Safo, department of Madarounfa); N’Yelwa (commune of Madarounfa, department of Madarounfa); Madarounfa (commune of Madarounfa, department of Guidan Roumdji). The software used is Minitab and Excel. The results highlight a good perspective for the irrigation system but this food system is conditioned by the petroleum price and some other input (fertilizer and seed). The operating accounts show that irrigation is a non-negligible income source, which increases the resilience of the farmers. [less ▲]

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See detailShaping (im)mobility: borders, camps, and non-state actors
Da Silva, Amanda Carolina ULg

Conference (2016, October 07)

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See detailQuelques réflexions méthodologiques sur les abandons de sanctuaires en Grèce antique
Palamidis, Alaya ULg

Conference (2016, October 07)

The archeological identification of the abandonment of cults faces two main difficulties. First, the absence of material posterior to a certain date in an excavated sanctuary does not necessarily mean ... [more ▼]

The archeological identification of the abandonment of cults faces two main difficulties. First, the absence of material posterior to a certain date in an excavated sanctuary does not necessarily mean that the sanctuary was abandoned. Secondly, the abandonment of a sanctuary does not necessarily mean the abandonment of the cult, since the cult may have been transferred to another sanctuary. [less ▲]

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See detailHTA du patient transplanté : quelles données pour adapter le traitement?
Krzesinski, Jean-Marie ULg

Conference (2016, October 06)

Hypertension en Transplantation Rénale: conclusions •L’HTA est fréquente , souvent multifactorielle et sa prise en charge est importante pour le pronostic. •Le recours aux techniques de mesure de la PA en ... [more ▼]

Hypertension en Transplantation Rénale: conclusions •L’HTA est fréquente , souvent multifactorielle et sa prise en charge est importante pour le pronostic. •Le recours aux techniques de mesure de la PA en dehors de la consultation est nécessaire. •La cible de la PA est d’autant plus basse que l’on s’éloigne de la date de la Transplantation (cible de la PA proposée <130/80 mmHg après le 1ier trimestre). •Rôle de l’alimentation dans l’approche thérapeutique et des AC DHP et Bêtabloquant. Changer l’IS peut être bénéfique. •Si résistance au traitement, rechercher une cause secondaire, une mauvaise adhérence à la diététique et aux médicaments. [less ▲]

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See detailGastronomy, a cultural heritage for our present and future time. An important protection for our territory, our agriculture and our welfare
Aresu, Anna Rosa ULg

Conference (2016, October 06)

The environment, the beautiful landscapes, the good air, the agriculture with its local products are the most important assets we have in our countries. They have great potential economically, but are not ... [more ▼]

The environment, the beautiful landscapes, the good air, the agriculture with its local products are the most important assets we have in our countries. They have great potential economically, but are not well exploited in some regions. In recent years the agri-food sector is the focus of interest of the development of these places, and we could start from this cultural heritage to develop our territory. The smaller agricultural realities, which cannot compete on price, must rely on the quality of their products with local, traditional and cultural characteristics (product placement techniques and production techniques), as a differentiating factor and position in market niches that reward their typicality and originality. Today the rediscovery of food as a journey, a path, a reference point for a culture of high-level, comprehensive, preserves the most important values for humans. Agricultural products, recipes, methods of preparation have been passed down for centuries, rediscovered and represented with great joy by those who are aware that good food should not be used exclusively to satisfy the palate and stomach.The products of our land are very important in building our ethnic identity, both individual and collective. For these reasons, they have an ethical, social, religious, and existential symbolism that goes beyond the economic sphere. And then we can write: gastronomy is culture. Today it is a desired and loved culture that moves the economy. Gastronomy is rich in history, tradition, customs, "know-how" that occurred across generations: how small producers live and grow, their work, mastery of men and women, respect for the land and for their territory. It’s intimately linked with our earth. [less ▲]

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See detailLes nouvelles recommandations 2016 dans l’insuffisance cardiaque & Présentation d'une étude de Télémédecine
Troisfontaines, Pierre; D'ORIO, Virginie ULg; Melissopoulou, Maria et al

Conference (2016, October 06)

Epidémiologie, diagnostic et Approche médicamenteuse. Dr M. Melissopoulou (CHR de liège) • Approche non médicamenteuse & comorbidités. Dr Troisfontaines (CHR de Liège) • Insuffisance cardiaque aigue ... [more ▼]

Epidémiologie, diagnostic et Approche médicamenteuse. Dr M. Melissopoulou (CHR de liège) • Approche non médicamenteuse & comorbidités. Dr Troisfontaines (CHR de Liège) • Insuffisance cardiaque aigue & Insuffisance cardiaque terminale. Dr V. D’Orio (CHU de Liège) • Présentation de l’étude Télémédecine Dr A. Ancion (CHU de Liège) [less ▲]

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See detailPhenotypic plasticity in a fossorial toad from a Pacific xeric forest (Ecuador)
Székely, Diana ULg; Szekely, Paul; Denoël, Mathieu ULg et al

Poster (2016, October 06)

For amphibians, optimal size at metamorphosis is determined by a trade-off between opportunities for growth and risks of mortality in aquatic and terrestrial habitats, and many species show a high degree ... [more ▼]

For amphibians, optimal size at metamorphosis is determined by a trade-off between opportunities for growth and risks of mortality in aquatic and terrestrial habitats, and many species show a high degree of plasticity in time and size at metamorphosis that allow them to adapt to unpredictable environments. We used as model a neotropical anuran species, the Pacific horned frog, Ceratophrys stolzmanni, that inhabits the Tumbesian dry forests of southwestern Ecuador, and lays its eggs in lentic habitats of variable size and unpredictable duration. We investigated (i) how tadpoles time their metamorphosis in order to escape a rapidly drying aquatic habitat, and (ii) the consequences of metamorphosis plasticity on the immediate and mid-term fitness of individuals. We conducted two experiments; in the first one we exposed 36 tadpoles to one of three water levels treatments: constant high, decreasing and constant low. Tadpoles that were raised in decreasing or low water level metamorphosed on average 13% and 10% faster than the ones from constant high water level, but at a lower body size and mass. Growth rates were among the highest recorded for tadpoles and individuals from the constant high water level treatment grew at a much faster rate than the others. In a second experiment, we sampled 72 freshly metamorphosed (Gosner stage 45) C. stolzmanni individuals of assorted sizes (SVL between 23.8 and 47.9 mm, body weight between 1.2 and 11.9 g). From this spectrum of sizes, we selected the 21 largest and 22 smallest individuals and evaluated the effects of body size at metamorphosis on trophic and locomotory performance parameters. We determined their growth rate and survival over the course of an activity season (i.e., two months). Our results show that bigger size at metamorphosis is correlated with better survival chances and performance. Larger individuals were more mobile, had bigger gape width and better survival rates (95% compared to 64% for small individuals). Growth rates were not correlated with initial size, and small individuals were capable of increasing their size at a higher rate. This indicates that, although size at metamorphosis has an immediate impact on fitness, smaller individuals are able to compensate with an increased growth rate. [less ▲]

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See detail“Avoiding disease has never favoured health”: Governance of plant health and management of crop diversity -the case of bean health management among members of the association Croqueurs de Carottes
Klaedtke, Stephanie ULg; Chable, Véronique; Stassart, Pierre M ULg

Conference (2016, October 06)

In 2010, a hot debate on bean seed quality in the framework of a European Research project led a French-speaking association of artisan seed companies to challenge EU "quarantine" measures on the ... [more ▼]

In 2010, a hot debate on bean seed quality in the framework of a European Research project led a French-speaking association of artisan seed companies to challenge EU "quarantine" measures on the bacterial agents of Common Bacterial Blight (CBB), a seedborne disease of common bean. The artisan seed companies (artisans semenciers) forming the association Croqueurs de Carottes are small enterprises producing and marketing seed of open-pollinated vegetable varieties from the public domain, based on networks of organic seed growing farmers. In doing so, the artisan seed companies contribute to the dynamic conservation of crop diversity and to making this diversity accessible to home and market gardeners. For the Croqueurs as member of the French Réseau Semences Paysannes (peasant seed network), this commercial activity also forms part of a wider movement of seed re-appropriation. The research presented here departs from the hypothesis that the dispute on the CBB "quarantine" measures reveals a more general discrepancy: The rationale behind the plant health management practices of the seed artisans differs from the rationale behind the quarantine measures which they face in the form of phytosanitary inspections. In the aim of specifying the plant health management practices of the artisan seed companies, these practices and the rationale behind it will be unfolded as an actor-network. In terms of actor network theory (ANT), the contestation of quarantine measures on common bean by the Croqueurs in France reveals the actor-network behind their bean health management. Disturbed by the quarantine measures, the network becomes apparent in a process of reassemblage. The network behind this particular plant health management will be unfolded by taking controversial elements of the implementation of quarantine measures as a starting point, such as the official protocol for the detection of bacterial pathogens on seeds and the competences of inspectors in charge of phytosanitary seed inspections. The description of the plant health management by artisanal seed companies will be based on the practices of the Croqueurs in France and Belgium, but also on the practices of two artisanal seed companies in Germany. By contrast, discrepancies with the dominant plant health management rationale will appear. Whereas the "quarantine" measures aim at eradicating CBB in the EU by admitting only CBB-free bean seed on the seed market, the artisan seed companies rather seek to live with plant diseases and integrate plant pathogens in their production systems. For the latter, managing crop and seed health also goes through managing sound environments. In the framework of evolving EU plant regulations and a reorganisation of phytosanitary seed inspections in France, the debates on plant health management in artisanal seed companies persist. Although much has been written and publically debated by non-profit organizations, small-scale seed companies and researchers concerning EU seed legislations, but the role of phytosanitary regulations in the dynamic conservation of crop biodiversity has received little attention. The research presented here represents a first step in addressing this question in the scientific arena. [less ▲]

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See detailIntroduction au Colloque "Du vivant au social: les semences en question"
Hecquet, Corentin ULg; Hermesse, Julie

Conference (2016, October 06)

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See detailAgeism among medical students
Corvol, Aline; Missotten, Pierre ULg; Gentric, Armelle et al

Poster (2016, October 06)

Introduction Negative stereotypes concerning elderly persons are widespread in general population. When they are adopted by health care professionals, it can decrease the quality of care or even induce ... [more ▼]

Introduction Negative stereotypes concerning elderly persons are widespread in general population. When they are adopted by health care professionals, it can decrease the quality of care or even induce disability. That’s why medical curriculum should take the question of ageism in consideration. Though, little is known about ageism among medical students and its determinants. Method We conducted a study on Rennes University (France) medical students (year 2 to year 6) using on line questionnaire. Validated tools, such as Fraboni Scale of Ageism, and innovating ones, such as verbal fluency task about aging and youth, have been proposed. Results have been compared with those obtained in Liège, Belgium, and analyzed according to age, gender, year of study, and geriatric training. Results Response rate was above 90%, leading to 814 replies. Replies, especially at the verbal fluency task, demonstrate the strength of negative stereotypes, with similar results in Rennes and Liège. No effect of courses or internship in geriatrics has been identified. Negative stereotypes seem lower in female students, and in those who have regular contact with elderly persons, especially if these contacts are good. Key conclusion Ageism is widespread in French medical students, whatever the year of study. Enhancing positive contacts between elderly persons and medical students may be an effective way to prevent it, but may be challenging to implement. Further studies could focus on implicit stereotypes to underplay the social desirability bias. [less ▲]

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See detailDevelopment of polymer-based systems for healthcare applications
Grandfils, Christian ULg

Conference (2016, October 06)

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See detailThe project PhytoKat in Lubumbashi, D.R. Congo: conditions for the integration of traditional medicine in modern healthcare
Bakari, A.; Meerts, P.; Vandenput, Sandrina ULg et al

Conference (2016, October 06)

The D.R. Congo still faces multiple health problems. Notably the access to conventional medicine is limited; as in most Sub-Saharan countries, traditional medicine is the primary, and often the only ... [more ▼]

The D.R. Congo still faces multiple health problems. Notably the access to conventional medicine is limited; as in most Sub-Saharan countries, traditional medicine is the primary, and often the only, source of care for a majority of the population and the WHO advocates its recognition and modernization for primary health care. This pilot project aims to establish the necessary foundation for progress in this direction in Katanga: • The conditions for the introduction of traditional practices in modern medicine will be evaluated (quality of the practitioners and diagnostics; quality, efficiency, safety of treatments); • Many plants used in traditional medicine have already been documented in Katanga; certain traditional practices have been validated by the identification of active compounds. The project proposes to deepen the botanical, pharmacological, chemical and agronomic study of these interesting species; • In the context of regional erosion of plant diversity, excessive harvesting of some vulnerable medicinal species could represent a serious threat; developing a conservation strategy is urgent and requires an inventory of their current distribution. Through 5 doctoral theses in pharmacognosy, biomedical and agronomic sciences, the project will aim at correcting the weaknesses identified by the recent Joint Context Analysis, performed in R.D. Congo at DGD initiative, for the domain environment/natural resources: "Lack of information, knowledge and awareness among decision makers and local communities on the benefits of biodiversity-related development". [less ▲]

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See detailMusic(ality) in Phillips’s Fiction
Mascoli, Giulia ULg

Conference (2016, October 06)

Caryl Phillips is a contemporary Anglo-Caribbean author. Phillips’s radio play on Marvin Gaye entitled “A Long Way From Home”, the television documentary “Darker than Blue” that he made about Curtis ... [more ▼]

Caryl Phillips is a contemporary Anglo-Caribbean author. Phillips’s radio play on Marvin Gaye entitled “A Long Way From Home”, the television documentary “Darker than Blue” that he made about Curtis Mayfield, and his novel Dancing in the Dark, which is entirely devoted to Bert Williams, a famous vaudeville entertainer, are just a few examples testifying to his interest in popular music. Surprisingly, although the musicality of Phillips’s writing has been mentioned in passing (Ledent & Tunca xiv) and the author himself has declared that his only model, if any, was music (Clingman 108), a detailed study of what exactly characterizes this musicality or what purposes it serves has yet to be undertaken. What I would like to do in this presentation is not only to conduct an in-depth examination of this pervasive musicality but, more importantly, to attempt to define what musicality is in the first place. [less ▲]

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See detailEmergence d'une catégorie de "non ayant droit". La Belgique et la réforme de l'assurance-chômage
Remy, Céline ULg; Senhadji, Khadija

Conference (2016, October 06)

Les récentes évolutions de l’assurance-chômage en Belgique font apparaître des vagues d’exclusions ‘automatiques’ de chômeurs allocataires d’insertion, ce qui étend par conséquent la catégorie de « non ... [more ▼]

Les récentes évolutions de l’assurance-chômage en Belgique font apparaître des vagues d’exclusions ‘automatiques’ de chômeurs allocataires d’insertion, ce qui étend par conséquent la catégorie de « non ayant-droit ». Cette dernière constitue un réel défi pour les institutions publiques car ces personnes disparaissent des radars institutionnels. Nous nous intéressons plus particulièrement au cas bruxellois où dès 2004, deux outils d’accompagnement ont été mis en place tout spécialement pour encadrer les jeunes chercheurs d’emploi. Une analyse chiffrée de la situation de ce public-cible encadré par les services publics bruxellois permettra de mettre en évidence le processus de (dé)régulation du marché de l’emploi. [less ▲]

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See detailTowards a data model for (inter)textual relationships. Connecting Ancient Egyptian texts and understanding scribal practices
Polis, Stéphane ULg; Razanajao, Vincent ULg; Sojic, Nathalie ULg

Conference (2016, October 05)

The goal of this lecture is theory-oriented: we propose a conceptual data model that allows us to deal with complex textual relationships. It is empirically grounded in our experience of digital ... [more ▼]

The goal of this lecture is theory-oriented: we propose a conceptual data model that allows us to deal with complex textual relationships. It is empirically grounded in our experience of digital annotation of Ancient Egyptian texts. This paper is initially born out of the practical need of annotating and linking together hundreds of textual witnesses in the framework of the Ramses project (Polis et al. 2013; Polis & Winand 2013), the aim of which is to build and publish online (http://ramses.ulg.ac.be) the first richly annotated corpus of Late Egyptian texts (c. 1350-900 BCE). [less ▲]

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See detailTowards a normalised 3D Geovisualisation : the viewpoint management
Neuville, Romain ULg; Poux, Florent ULg; Hallot, Pierre ULg et al

in ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences (2016, October 05), IV-2(W1), 179-186

This paper deals with the viewpoint management in 3D environments considering an allocentric environment. The recent advances in computer sciences and the growing number of affordable remote sensors lead ... [more ▼]

This paper deals with the viewpoint management in 3D environments considering an allocentric environment. The recent advances in computer sciences and the growing number of affordable remote sensors lead to impressive improvements in the 3D visualisation. Despite some research relating to the analysis of visual variables used in 3D environments, we notice that it lacks a real standardisation of 3D representation rules. In this paper we study the “viewpoint” as being the first considered parameter for a normalised visualisation of 3D data. Unlike in a 2D environment, the viewing direction is not only fixed in a top down direction in 3D. A non-optimal camera location means a poor 3D representation in terms of relayed information. Based on this statement we propose a model based on the analysis of the computational display pixels that determines a viewpoint maximising the relayed information according to one kind of query. We developed an OpenGL prototype working on screen pixels that allows to determine the optimal camera location based on a screen pixels colour algorithm. The viewpoint management constitutes a first step towards a normalised 3D geovisualisation. [less ▲]

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See detailQuelle(s) langue(s) pour l'enseignement supérieur ?
Winand, Jean ULg

Conference (2016, October 05)

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See detailSMART POINT CLOUD: DEFINITION AND REMAINING CHALLENGES
Poux, Florent ULg; Neuville, Romain ULg; Hallot, Pierre ULg et al

in ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences (2016, October 05), IV-2(W1), 119-127

Dealing with coloured point cloud acquired from terrestrial laser scanner, this paper identifies remaining challenges for a new data structure: the smart point cloud. This concept arises with the ... [more ▼]

Dealing with coloured point cloud acquired from terrestrial laser scanner, this paper identifies remaining challenges for a new data structure: the smart point cloud. This concept arises with the statement that massive and discretized spatial information from active remote sensing technology is often underused due to data mining limitations. The generalisation of point cloud data associated with the heterogeneity and temporality of such datasets is the main issue regarding structure, segmentation, classification, and interaction for an immediate understanding. We propose to use both point cloud properties and human knowledge through machine learning to rapidly extract pertinent information, using user-centered information (smart data) rather than raw data. A review of feature detection, machine learning frameworks and database systems indexed both for mining queries and data visualisation is studied. Based on existing approaches, we propose a new 3-block flexible framework around device expertise, analytic expertise and domain base reflexion. This contribution serves as the first step for the realisation of a comprehensive smart point cloud data structure [less ▲]

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See detailMise en place de pratiques agricoles de conservation: quel impact sur la vie du sol
Degrune, Florine ULg; Boeraeve, Fanny ULg; Vandenbol, Micheline ULg et al

Poster (2016, October 04)

Le projet Farm4Future a été lancé en 2015 et consiste en un suivi intégré d’un réseau d’exploitations agricoles belges en cours de transition vers des pratiques dites « de conservation ». Les ... [more ▼]

Le projet Farm4Future a été lancé en 2015 et consiste en un suivi intégré d’un réseau d’exploitations agricoles belges en cours de transition vers des pratiques dites « de conservation ». Les exploitations étudiées dans le cadre de ce projet sont caractérisées par des changements de gestion incluant notamment : (1) des associations de culture, (2) des couverts permanents, (3) une réduction du travail du sol et (4) l’introduction de structures vertes telles que les haies ou les bandes fleuries. Afin d’évaluer le potentiel agronomique et écologique de ces systèmes agricoles, une série de mesures ont été effectuées dans deux types de sol aux propriétés texturales contrastées : sable limoneux et un limon sableux. Afin d’obtenir un point de comparaison, les mêmes mesures ont été effectuées sur les parcelles des agriculteurs voisins restés en intensif et conventionnel. Parmi ces mesures, nous étudions la réponse de plusieurs indicateurs biologiques de qualité des sols telle que la diversité microbienne. L’étude a démontré un effet du type de pratiques agricoles sur la diversité microbienne en fonction du type de sol. Nous avons également identifié les microorganismes sensibles au type de pratiques agricoles. Cependant, l’étude nous amène à démontrer une grande hétérogénéité de réponses au sein de chacun de ces groupes. En effet, même si certains grands groupes sont globalement plus abondants sous pratiques de conservation (ou conventionnel), la réponse des microorganismes au sein de ces groupes à des niveaux taxonomiques plus fins (genre ou espèce) n’est pas uniforme. Aujourd’hui, même si les outils moléculaires de séquençage à haut débit ont permis de mettre en lumière l’incroyable diversité microbienne des sols, les services écosystémiques rendus par ces microorganismes sont encore très peu connus car moins de 1% des organismes est cultivable en laboratoire. [less ▲]

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See detailExpanding the scope of cobalt-mediated radical polymerization towards the synthesis of novel poly(vinyl acetate-alt-tert-butyl-2-trifluoromethacrylate) alternating fluorocopolymers
Banerjee; Ladmiral, Vincent; Debuigne, Antoine ULg et al

Conference (2016, October 04)

Cobalt mediated radical polymerization (CMRP) is a nice technique to control the radical polymerization of vinyl acetate, VAc, but has never been reported on fluoromonomers. This presentation aims at ... [more ▼]

Cobalt mediated radical polymerization (CMRP) is a nice technique to control the radical polymerization of vinyl acetate, VAc, but has never been reported on fluoromonomers. This presentation aims at showing recent works on the use of CRMP to prepare well-defined unprecedented 1:1 alternating fluorocopolymers with narrow dispersity (≤1.3) comprised of a polar monomer (VAc) and a non-homopolymerizable fluoromonomer (tert-butyl-2-trifluoromethacrylate, MAF-TBE), under mild conditions.[1] The resulting poly(VAc-alt-MAF-TBE) copolymers have a precise 1:1 alternating structure over a wide range of the comonomer feed compositions in CMRP conditions as well as under free radical polymerization conditions,[2] as confirmed by NMR spectroscopies. Kinetics of radical copolymerization led to their reactivity ratios: rVAc = 0.014; rMAF-TBE = 0 at 40 °C). Simple adjustments of the monomer feed ratio and of the polymerization time, allow the synthesis of well-defined alternating copolymer or of novel poly(VAc- alt- MAF-TBE)-b-PVAc block copolymer composed of an alternating block and of a PVAc block. The block copolymer exhibited two glass transition temperatures (Tg) at 43 and 67 °C, which correspond to those of PVAc segment and poly(VAc-alt-MAF-TBE) alternating sequences, respectively. In contrast, the poly(VAc-alt-MAF-TBE) alternating copolymer displayed only one Tg at 40 °C. For the first time, CMRP of fluorinated monomer was achieved and this fluorine-containing alternating monomer system provides access to a wide range of new polymer materials, under progress. [less ▲]

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See detailThe functional-biogeography of the reef fishes in the Gulf of California: over-importance of a handful of sites
Olivier, Damien ULg; Reyes Bonilla, Hector

Poster (2016, October 03)

Functional biogeography is a new discipline allowing to link biogeographical patterns of trait and species diversity. This new area of research has a role in conservation policy because it permits to ... [more ▼]

Functional biogeography is a new discipline allowing to link biogeographical patterns of trait and species diversity. This new area of research has a role in conservation policy because it permits to create functional maps to highlight hotspots of biodiversity. In this study, we evaluate the taxonomic and functional diversity of the reef-fishes in 30 “archipelagoes” widespread along the Gulf of California (GOC). The question before us is to highlight areas requiring a particular intention in conservation policy because they represent a large part of the legacy of reef-fish diversity in the GOC. To do so, we used a recently developed method to classify the reef-fishes species of the GOC in functional entities (FEs). The FEs are based on unique combinations of six categorical traits known to influence the functional role of fishes (e.g. size, diet…) and their number represent the level of functional diversity of the community. The results showed that the Baja California Sur has the most diversified reef-fishes community, both taxonomically and functionally (more than 90% of the species and of the functional diversity are represented). This result is mainly due to four archipelagoes that present a dazzling diversity, i.e. Carmen, San José, Espiritu Santo and Cerralvo. Each of these islands includes 60% or more of the taxonomic and functional diversity of the GOC. Two of these archipelagoes benefit of a protection level through the National Parks of Loreto and Espiritu Santo. However, the former is poorly functioning and the latter is under evaluation. The outcomes of the present study provide a global map of the reef-fishes diversity through the GOC, in term of species number and functional diversity. These results allow the identification of four major hotspots of diversity that should require a particular attention to preserve the legacy of reef-fishes diversity in the GOC. [less ▲]

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See detailH Escape Rates Inferred from MAVEN/IUVS Observations of the Mars Hydrogen Corona
Chaffin, Michael S.; Chaufray, Jean-Yves; Deighan, Justin et al

in AAS/Division for Planetary Sciences Meeting Abstracts (2016, October 01)

H escape oxidizes and dessicates the Mars atmosphere and surface, providing a key control on the present-day chemistry and long-term evolution of the planet. Recently, large variations in the escape rate ... [more ▼]

H escape oxidizes and dessicates the Mars atmosphere and surface, providing a key control on the present-day chemistry and long-term evolution of the planet. Recently, large variations in the escape rate of H as a function of season have been reported by several studies, making continued observation of the variation a high priority. We present escape rates derived from Mars Atmosphere and Volatile EvolutioN (MAVEN) mission Imaging UltraViolet Spectrograph (IUVS) observations of the extended atmosphere of Mars at H Lyman alpha (121.6 nm), which must be interpreted with a coupled density/radiative transfer model owing to the optically thick nature of the emission and the small fraction of H present in the corona on escaping trajectories. We recover densities, temperatures, and escape rates under the assumption of spherical symmetry for multiple periods across MAVEN's mission so far, beginning in December 2014 (escape rates ~4e8/cm2/s). We describe the observed variation and compare it with previously observed seasonal variation in retrieved H escape rates, providing a necessary input for future photochemical modeling studies and estimates of water loss from Mars over its history. [less ▲]

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See detailLimb Observations of Solar Scattered Light by the Imaging Ultraviolet Spectrograph on MAVEN: New Constraints on Martian Mesospheric Cloud Variability
Stevens, Michael H.; Siskind, David E.; Evans, Scott et al

in AAS/Division for Planetary Sciences Meeting Abstracts (2016, October 01)

The Imaging Ultraviolet Spectrograph (IUVS) on NASA's Mars Atmosphere and Volatile Evolution (MAVEN) mission observed the Martian upper atmosphere in late 2015 (Ls ~ 70) and early 2016 (Ls ~ 150 ... [more ▼]

The Imaging Ultraviolet Spectrograph (IUVS) on NASA's Mars Atmosphere and Volatile Evolution (MAVEN) mission observed the Martian upper atmosphere in late 2015 (Ls ~ 70) and early 2016 (Ls ~ 150). Although designed to measure the dayglow between 90-200 km IUVS also scans the limb down to 60 km, where solar scattered light dominates the mid-ultraviolet (MUV) signal. Occasionally, this MUV light shows enhanced scattering between 60-90 km indicating the presence of aerosols in the mesosphere. We quantify the solar scattering for each daylight scan obtained between October and December, 2015 and between April and June, 2016. We then identify over 100 scans of enhanced scattering between 60-90 km and assemble them both geographically and diurnally. The geographical distribution of the enhancements in 2015 is preferentially located near the equator, consistent with previous observations of mesospheric clouds for this part of the season. A wave three pattern in equatorial cloud occurrence suggests forcing from a non-migrating tide, possibly linked to the longitudinal variation of Mars surface topography. At the same time, there are indications of a diurnal variation such that the clouds seen in 2015 and 2016 are preferentially observed in the early morning, between 0600-0900 local solar time. This suggests an important role for a migrating temperature tide controlling the formation of Martian mesospheric clouds. [less ▲]

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See detailMartian upper atmosphere response to solar EUV flux and soft X-ray flares
Jain, Sonal; Stewart, Ian; Schneider, Nicholas M. et al

in AAS/Division for Planetary Sciences Meeting Abstracts (2016, October 01)

Planetary upper atmosphere energetics is mainly governed by absorption of solar extreme ultraviolet (EUV) radiation. Understanding the response of planetary upper atmosphere to the daily, long and short ... [more ▼]

Planetary upper atmosphere energetics is mainly governed by absorption of solar extreme ultraviolet (EUV) radiation. Understanding the response of planetary upper atmosphere to the daily, long and short term variation in solar flux is very important to quantify energy budget of upper atmosphere. We report a comprehensive study of Mars dayglow observations made by the IUVS instrument aboard the MAVEN spacecraft, focusing on upper atmospheric response to solar EUV flux. Our analysis shows both short and long term effect of solar EUV flux on Martian thermospheric temperature. We find a significant drop (> 100 K) in thermospheric temperature between Ls = 218° and Ls = 140°, attributed primarily to the decrease in solar activity and increase in heliocentric distance. IUVS has observed response of Martian thermosphere to the 27-day solar flux variation due to solar rotation.We also report effect of two solar flare events (19 Oct. 2014 and 24 March 2015) on Martian dayglow observations. IUVS observed about ~25% increase in observed brightness of major ultraviolet dayglow emissions below 120 km, where most of the high energy photons (< 10 nm) deposit their energy. The results presented in this talk will help us better understand the role of EUV flux in total heat budget of Martian thermosphere. [less ▲]

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See detailScience highlights from MAVEN/IUVS after two years in Mars orbit
Schneider, Nicholas M.; Deighan, Justin; Stiepen, Arnaud ULg et al

in AAS/Division for Planetary Sciences Meeting Abstracts (2016, October 01)

The broad capabilities of the Imaging UltraViolet Spectrograph on the MAVEN mission are enabling new science ranging from Mars' lower atmosphere up though the escaping corona. After two years in Mars ... [more ▼]

The broad capabilities of the Imaging UltraViolet Spectrograph on the MAVEN mission are enabling new science ranging from Mars' lower atmosphere up though the escaping corona. After two years in Mars orbit, the instrument has yielded insights on the Mars dayglow, season cycles, nightglow, aurora, meteor showers, clouds, solar-planetary interactions and atmospheric escape. In this presentation we will highlight several new discoveries. First, IUVS has observed a third type of aurora not previously seen at Mars, indicative of a new kind of solar-planet interaction for non-magnetized planets. Second, spatial mapping of nitric oxide nightglow reveals regions of atmospheric downwelling necessitating substantial changes to global atmospheric circulation models. Finally, a new high-spatial-resolution UV imaging mode allows unprecedented determinations of Mars' low-altitude ozone, as well as detection of clouds from nadir to limb. [less ▲]

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See detailVLT/SPHERE observations and shape reconstruction of asteroid (6) Hebe
Marsset, Michael; Carry, Benoit; Dumas, Christophe et al

in AAS/Division for Planetary Sciences Meeting Abstracts (2016, October 01)

(6) Hebe is a large main-belt asteroid, accounting for about half a percent of the mass of the asteroid belt. Its spectral characteristics and close proximity to dynamical resonances within the main-belt ... [more ▼]

(6) Hebe is a large main-belt asteroid, accounting for about half a percent of the mass of the asteroid belt. Its spectral characteristics and close proximity to dynamical resonances within the main-belt (the 3:1 Kirkwood gap and the nu6 resonance) make it a probable parent body of the H-chondrites and IIE iron meteorites found on Earth.We present new AO images of Hebe obtained with the high-contrast imager SPHERE (Beuzit et al. 2008) as part of the science verification of the instrument. Hebe was observed close to its opposition date and throughout its rotation in order to derive its 3-D shape, and to allow a study of its surface craters. Our observations reveal impact zones that witness a severe collisional disruption for this asteroid. When combined to previous AO images and available lightcurves (both from the literature and from recent optical observations by our team), these new observations allow us to derive a reliable shape model using our KOALA algorithm (Carry et al. 2010). We further derive an estimate of Hebe's density based on its known astrometric mass. [less ▲]

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See detailCharacterization of the high-albedo NEA 3691 Bede
Wooden, Diane H.; Lederer, Susan M.; Jehin, Emmanuel ULg et al

in AAS/Division for Planetary Sciences Meeting Abstracts (2016, October 01)

Characterization of NEAs provides important inputs to models for atmospheric entry, risk assessment and mitigation. Diameter is a key parameter because diameter translates to kinetic energy in atmospheric ... [more ▼]

Characterization of NEAs provides important inputs to models for atmospheric entry, risk assessment and mitigation. Diameter is a key parameter because diameter translates to kinetic energy in atmospheric entry. Diameters can be derived from the absolute magnitude, H(PA=0deg), and from thermal modeling of observed IR fluxes. For both methods, the albedo (pv) is important - high pv surfaces have cooler temperatures, larger diameters for a given Hmag, and shallower phase curves (larger slope parameter G). Thermal model parameters are coupled, however, so that a higher thermal inertia also results in a cooler surface temperature. Multiple parameters contribute to constraining the diameter.Observations made at multiple observing geometries can contribute to understanding the relationships between and potentially breaking some of the degeneracies between parameters. We present data and analyses on NEA 3691 Bede with the aim of best constraining the diameter and pv from a combination of thermal modeling and light curve analyses. We employ our UKIRT+Michelle mid-IR photometric observations of 3691 Bede's thermal emission at 2 phase angles (27&43 deg 2015-03-19 & 04-13), in addition to WISE data (33deg 2010-05-27, Mainzer+2011).Observing geometries differ by solar phase angles and by moderate changes in heliocentric distance (e.g., further distances produce somewhat cooler surface temperatures). With the NEATM model and for a constant IR beaming parameter (eta=constant), there is a family of solutions for (diameter, pv, G, eta) where G is the slope parameter from the H-G Relation. NEATM models employing Pravec+2012's choice of G=0.43, produce D=1.8 km and pv≈0.4, given that G=0.43 is assumed from studies of main belt asteroids (Warner+2009). We present an analysis of the light curve of 3691 Bede to constrain G from observations. We also investigate fitting thermophysical models (TPM, Rozitis+11) to constrain the coupled parameters of thermal inertia (Gamma) and surface roughness, which in turn affect diameter and pv. Surface composition can be related to pv. This study focuses on understanding and characterizing the dependency of parameters with the aim of constraining diameter, pv and thermal inertia for 3691 Bede. [less ▲]

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See detail2003 AZ84: Size, shape, albedo and first detection of topographic features
Dias-Oliveira, Alex; Sicardy, Bruno; Ortiz, Jose-Luis et al

in AAS/Division for Planetary Sciences Meeting Abstracts (2016, October 01)

We analyze two multi-chord stellar occultations by the Trans-Neptunian Object (TNO) 2003 AZ84 observed on February 3, 2012 and November 15, 2014.They provide different elliptical limb fits that are ... [more ▼]

We analyze two multi-chord stellar occultations by the Trans-Neptunian Object (TNO) 2003 AZ84 observed on February 3, 2012 and November 15, 2014.They provide different elliptical limb fits that are consistent to within their respective error bars, but could also suggest a possible precession of the object (assumed here to be a Maclaurin spheroid). The derived equatorial radius and oblateness are R[SUB]e[/SUB] = 393 ± 7 km and ɛ = 0.057 in 2014 and R[SUB]e[/SUB] = 414 ± 13 km and ɛ = 0.165 in 2012, respectively. Those results are consistent with single-chord events observed in January 2011 and December 2013. The figures above provide geometric visual albedos of p[SUB]V(2014)[/SUB] = 0.112 ± 0.008 and p[SUB]V(2012)[/SUB] = 0.114 ± 0.020. Using the Maclaurin assumption, combined with possible rotational periods of 6.67 h and 10.56 h, we estimate density upper limits of 1.89 ± 0.16g/cm[SUP]3[/SUP] and 0.77 ± 0.07g/cm[SUP]3[/SUP] for the two dates, respectively.The 2014 event provides (for the first time during a TNO occultation) a grazing chord with a gradual disappearance of the star behind 2003[SUB]AZ[/SUB]84's limb that lasts for more than 10 seconds. We rule out the possibility of a localized dust concentration as it would imply very high optical depth for that cloud. We favor a local topographic feature (chasm) with minimum width and depth of 22 ± 2.5 km and 7 ± 2.0 km, respectively. Features with similar depths are in fact observed on Pluto's main satellite, Charon, which has a radius of about 605 km, comparable to that of 2003[SUB]AZ[/SUB]84. [less ▲]

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See detailMeasurements of D and H in the Upper Atmosphere of Mars with the MAVEN IUVS Echelle Channel
Clarke, John T.; Mayyasi, Majd A.; Bhattacharyya, Dolon et al

in AAS/Division for Planetary Sciences Meeting Abstracts (2016, October 01)

The enhanced ratio of D/H in the martian atmosphere has long been interpreted to provide evidence for the historic loss rate of water into space, with the enhancement resulting from the mass ratio of the ... [more ▼]

The enhanced ratio of D/H in the martian atmosphere has long been interpreted to provide evidence for the historic loss rate of water into space, with the enhancement resulting from the mass ratio of the species. Understanding the dependence of the enrichment of D on the loss rate of water requires that one understand the controlling factors, including all sources of exospheric hydrogen and the present-day transport of D and H into the upper atmosphere. Toward this end the MAVEN mission has included an echelle channel in the IUVS instrument that resolves the D and H Lyman alpha emissions produced by resonant scattering of bright solar emission. In this mode it has now been possible to measure the upper atmospheric D and H abundances over most of a martian year. The results are surprising, with larger than expected changes in the D and H abundances and a changing ratio of D/H with a strong seasonal dependence. This talk will present the D and H data to date (Mars will be near perihelion by the time of the DPS meeting) and discuss the interpretation of the large changes that have been observed. [less ▲]

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See detailThe Eating Context Drawing Test : clinical implications: a case study of an adolescent obese girl
Lepot, Aurélie ULg; D'Amore, Salvatore; Onnis, Luigi

Conference (2016, October 01)

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See detailThe OD/OH Isotope Ratio in Comets 8P/Tuttle and C/2012 F6 (Lemmon)
Rousselot, Philippe; Jehin, Emmanuel ULg; Hutsemekers, Damien ULg et al

in Bulletin of the American Astronomical Society (2016, October 01), 48

The determination of isotopic ratios in solar system objects is an important source of information about their origin, especially for comets. Among these ratios the D/H is of particular importance because ... [more ▼]

The determination of isotopic ratios in solar system objects is an important source of information about their origin, especially for comets. Among these ratios the D/H is of particular importance because of its sensitivity to fractionation processes and physical environment, and the abundance of hydrogen in the solar system. The main molecule used to derive this ratio in comets is water. So far, apart water, only HCN has permitted to derive D/H ratio and not only upper limits.Most of the existing determinations of D/H in water molecules have been obtained by spectroscopic observations of water lines in the sub-mm or near infrared range [1,2]. So far only one measurement has been based on OD/OH emission lines radicals in the near-UV [3] and another one on the Lyman-alpha D emission [4]. In situ measurements have also been obtained in comets 1P/Halley and 67P/Churyumov-Gerasimenko using mass spectrometer [5,6,7,8].In this work we have used the OH and OD ultraviolet bands at 310 nm observed with the ESO 8-m Very Large Telescope feeding the Ultraviolet-Visual Echelle Spectrograph (UVES) for measuring the D/H ratio in comets 8P/Tuttle and C/2012 F6 (Lemmon). The OH and OD being the photodissociation products of H[SUB]2[/SUB]O and HDO such observations allow to derive D/H ratio for water molecules. This work constitutes an independant determination of the D/H ratios already published for these comets and based on observations performed in the sub-mm and near infrared range of H[SUB]2[/SUB]O and HDO lines. We present our modeling, data analysis and numerical values obtained for this ratio.[1] D. Bockelée-Morvan et al., 2015, SSR 197, 47-83 [2] N. Biver et al., 2016, A&A 589, id A78, 11p [3] D. Hutsemékers et al., 2008, A&A 490, L31 [4] H.A. Weaver et al., 2008, LPI Contributions 1405, 8216 [5] H. Balsiger, K. Altwegg, J. Geiss, 1995, JGR 100, 5827 [6] P. Eberhardt et al., 1995, A&A 302, 301 [7] R.H. Brown et al., 2012, PSS 60, 166 [8] K. Alwegg et al., 2015, Science 347, article id. 1261952 [less ▲]

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See detailDiscovery of temperate Earth-sized planets transiting a nearby ultracool dwarf star
Jehin, Emmanuel ULg; Gillon, Michaël ULg; Lederer, Susan M. et al

in AAS/Division for Planetary Sciences Meeting Abstracts (2016, October 01)

We report the discovery of three short-period Earth-sized planets transiting a nearby ultracool dwarf star using data collected by the Liège TRAPPIST telescope, located in la Silla (Chile). TRAPPIST-1 is ... [more ▼]

We report the discovery of three short-period Earth-sized planets transiting a nearby ultracool dwarf star using data collected by the Liège TRAPPIST telescope, located in la Silla (Chile). TRAPPIST-1 is an isolated M8.0±0.5-type dwarf star at a distance of 12.0±0.4 parsecs as measured by its trigonometric parallax, with an age constrained to be > 500 Myr, and with a luminosity, mass, and radius of 0.05%, 8% and 11.5% those of the Sun, respectively. The small size of the host star, only slightly larger than Jupiter, translates into Earth-like radii for the three discovered planets, as deduced from their transit depths. The inner two planets receive four and two times the irradiation of Earth, respectively, placing them close to the inner edge of the habitable zone of the star. Several orbits remain possible for the third planet based on our current data. The infrared brightness of the host star combined with its Jupiter-like size offer the possibility of thoroughly characterizing the components of this nearby planetary system. [less ▲]

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See detailSurvey for Ortho-to-Para Abundance Ratios (OPRs) of NH2 in Comets: Revisit to the Meaning of OPRs of Cometary Volatiles
Kawakita, Hideyo; Shinnaka, Yoshiharu; Jehin, Emmanuel ULg et al

in Bulletin of the American Astronomical Society (2016, October 01), 48

Since molecules having identical protons can be classified into nuclear-spin isomers (e.g., ortho-H[SUB]2[/SUB]O and para-H[SUB]2[/SUB]O for water) and their inter-conversions by radiative and non ... [more ▼]

Since molecules having identical protons can be classified into nuclear-spin isomers (e.g., ortho-H[SUB]2[/SUB]O and para-H[SUB]2[/SUB]O for water) and their inter-conversions by radiative and non-destructive collisional processes are believed to be very slow, the ortho-to-para abundance ratios (OPRs) of cometary volatiles such as H[SUB]2[/SUB]O, NH[SUB]3[/SUB] and CH[SUB]4[/SUB] in coma have been considered as primordial characters of cometary molecules [1]. Those ratios are usually interpreted as nuclear-spin temperatures although the real meaning of OPRs is in strong debate. Recent progress in laboratory studies about nuclear-spin conversion in gas- and solid-phases [2,3] revealed short-time nuclear-spin conversions for water, and we have to reconsider the interpretation for observed OPRs of cometary volatiles. We have already performed the survey for OPRs of NH[SUB]2[/SUB] in more than 20 comets by large aperture telescopes with high-resolution spectrographs (UVES/VLT, HDS/Subaru, etc.) in the optical wavelength region [4]. The observed OPRs of ammonia estimated from OPRs of NH[SUB]2[/SUB], cluster around ~1.1 (cf. 1.0 as a high-temperature limit), indicative of ~30 K as nuclear-spin temperatures. We present our latest results for OPRs of cometary NH[SUB]2[/SUB] and discuss about the real meaning of OPRs of cometary ammonia, in relation to OPRs of water in cometary coma. Chemical processes in the inner coma may play an important role to achieve un-equilibrated OPRs of cometary volatiles in coma.This work was financially supported by MEXT Supported Program for the Strategic Research Foundation at Private Universities, 2014–2018 (No. S1411028) (HK) and by Graint-in-Aid for JSPS Fellows, 15J10864 (YS).References:[1] Mumma & Charnley, 2011, Annu. Rev. Astro. Astrophys. 49, 471.[2] Hama & Watanabe, 2013, Chem. Rev. 113, 8783.[3] Hama et al., 2008, Science 351, 6268.[4] Shinnaka et al., 2011, ApJ 729, 81. [less ▲]

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See detailOPTIMIZATION OF A FULLY AUTOMATED ELECTROPHORETICALLY MEDIATED MICROANALYSIS SYSTEM FOR CYP1A1 ACTIVITY MONITORING
Farcas, Elena ULg; Servais, Anne-Catherine ULg; Lamalle, Caroline et al

Conference (2016, October 01)

Objective of the study Since CYP1A1, a member of cytochrome P450 superfamily, has been described to be over expressed in various types of cancer, our study was focused on the optimization of a fully ... [more ▼]

Objective of the study Since CYP1A1, a member of cytochrome P450 superfamily, has been described to be over expressed in various types of cancer, our study was focused on the optimization of a fully automated system for the monitoring of this particularly interesting enzyme. Moreover, the potentiality of this approach to screen CYP1A1 inhibitors was investigated. Materials and methods The experiments were carried out on a HP3DCE system using an on-column DAD. The EMMA procedure was performed by injecting a plug containing the co-factor(NADPH) and the substrate(7-ethoxycoumarin) between two plugs of CYP1A1 supersomes. The reaction was triggered by the application of a voltage switch. The voltage was then turned off to allow the metabolic reaction to occur. The separation of the components was then performed. Results Satisfying results were obtained using CYP1A1 at a concentration of 200 pmol/mL, while the incubation time was settled to 15 min. A DoE was performed to find the best mixing conditions. The amount of metabolite obtained was comparable to the one detected after conventional off-line metabolization. The ability of our system to monitor CYP1A1 inhibition was then proven with apigenin, a well-known CYP1A1 inhibitor. Conclusions The present study describes the development of a fully automatized in-capillary method for CYP1A1 activity monitoring and proves the potentialy of our system to be used for the screening of CYP1A1 inhibitors. The advantages of performing inline metabolization assays are mainly the miniaturization and the automatization of the process. Besides, the reagents consumption is drastically reduced due to the injection of few tens of nanoliters. [less ▲]

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Peer Reviewed
See detailLa communauté germanophone et la frontière orientale de Belgique : géohistoire et enjeux
Robelin, Cyril ULg; Brassart, Dorothée

Conference (2016, October 01)

Face aux querelles linguistiques entre Francophones et Néerlandophones qui paralysent le pays, la communauté germanophone de Belgique tente de trouver sa place dans un état multilingue. Pays de marche ... [more ▼]

Face aux querelles linguistiques entre Francophones et Néerlandophones qui paralysent le pays, la communauté germanophone de Belgique tente de trouver sa place dans un état multilingue. Pays de marche fondé lors de la Révolution de 1830, la Belgique a eu du mal à définir ses limites. Si la frontière méridionale avec la France n'est jamais vraiment remise en cause, celles du Nord et de l'Est sont davantage problématiques. La limite septentrionale fut fixée en 1839, lors du traité des XXIV articles de Londres, même si elle a eu du mal à renoncer aux bouches du Rhin ou au Limbourg. La frontière de l'Est reste épineuse. Le Grand Duché de Luxembourg demeure jusqu'à la Deuxième Guerre mondiale une revendication vive du Royaume. Celles de l'Allemagne sont également très critiquées. Pendant tout le XIXe siècle elle fut dans une large mesure largement fantasmée. Elle fut d'abord le cadre d'une expérience politique inédite, le Territoire neutre de Moresnet. Né d'un contentieux du traité de Vienne (1815), ce village et son gisement de cuivre furent coadministrés par le Royaume des Pays-Bas (puis la Belgique à partir de 1830) et la Prusse (devenue Allemagne en 1870). Pendant un siècle, ce territoire neutre réinvente totalement la notion de frontière. En effet, ici il s'agit non pas d'une ligne, mais d'une surface. Entité sans loi bien définie, elle devient un lieu totalement imaginé. Elle fut alors le havre supposé de toutes les canailles de l'Occident (« Far West » européen). Un des premiers casinos à voulu s'y installer. On a même voulu faire de Moresnet le premier territoire espérantiste du monde afin de dépasser les questions linguistiques. Les représentations de la frontière belgo-germanique sont polyformes tout au long du XIXe siècle. On la définit comme une zone de transition avec ses nombreux contrebandiers, une zone interlope (entre deux états, voire entre deux mondes comme en témoigne la présence de vampires), mais aussi une zone de fermeture avec l'avénement de l'Etat-nation et du nationalisme. A partir de 1914, elle devient un enjeu de géopolitique européenne. Il s'agit de la première frontière violée par l'Allemagne en août. Dès la fin du conflit, la Belgique souhaite annexer les districts de Moresnet, d'Eupen et de Malmedy avançant l'argument historique (ils faisaient partie des Pays-Bas espagnols) ou linguistique (Malmedy est largement francophone). A Versailles, la Belgique essaie de se faire entendre en s'appuyant avant tout sur le concours de Georges Clémenceau. Même si la délégation allemande tente de repousser cette annexion, le traité final attribue tous ces districts à la Belgique. Pour la première fois de son histoire le territoire de la Belgique s'étend. Un plébiscite est tout de même organisé en 1920, mais à main levée. L'écrasante majorité des électeurs se prononce pour un rattachement au royaume. Ils deviennent citoyens belges en 1925. Toutefois, la réorientation de cette périphérie vers Bruxelles n'est pas sans poser des problèmes techniques. Pendant les années 20 et 30, cet espace frontalier favorise l'irredentisme allemand, à tel point qu'on le nomme parfois « l'Alsace-Lorraine » belge. Ils sont même intégrés au Reich en 1940. A la fin de la Deuxième Guerre mondiale, ils font définitivement leur retour au territoire belge. L'état fait tout pour intégrer pleinement ces marges et cette communauté pleinement au sein de la société. Dans le cadre des querelles linguistiques et de la question du fédéralisme qui déchirent le royaume, les Germanophones restent discrets. Néanmoins, dans le cadre des lois linguistiques de 1963, une région de langue allemande est créée et reconnue : la Belgique reconnaît trois communautés linguistiques. Pourtant, part entière de la province de Liège, elle s'individualise au sein de la communauté culturelle germanophone de Belgique à partir des années 70 et 80, avec ses propres compétences, son gouvernement, son parlement, ses medias, sa police etc. Souvent loin du centre Bruxellois et de ses problèmes, elle semble davantage se tourner vers l'acteur européen, notamment par l'intermédiaire de l'eurorégion Rhin-Meuse. Ainsi, cette géohistoire de la frontière de l'Est et de la communauté germanophone de Belgique permet une réflexion intéressante sur les limites politiques mais aussi linguistiques à la fois à l'extérieur comme à l'intérieur du pays. Périphérie de la Belgique, elle n'en demeure pas moins un arbitre qui veut jouer pleinement son rôle au sein du Royaume et de l'Europe de demain. [less ▲]

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See detailTwilight Limb Observations of the Martian North Polar Hood by MAVEN IUVS
Lo, Daniel; Yelle, Roger; Schneider, Nicholas M. et al

in AAS/Division for Planetary Sciences Meeting Abstracts (2016, October 01)

In northern winter, a broad distribution of ice aerosols appears in the north polar atmosphere of Mars, commonly referred to as the North Polar Hood (NPH). The NPH is thought to be formed as a result of ... [more ▼]

In northern winter, a broad distribution of ice aerosols appears in the north polar atmosphere of Mars, commonly referred to as the North Polar Hood (NPH). The NPH is thought to be formed as a result of condensation from lowered temperatures associated with both seasonal and diurnal variations in solar heating. The spatial extent and density of the NPH is highly variable, with a maximum latitudinal extent spanning 30-80°N, and a maximum density at 10-30 km altitude.The NPH has been extensively observed by both ground-based telescopes and instruments in orbit around Mars. However, the majority of these observations are nadir-pointing. This observation geometry has two significant limitations. Firstly, they poorly probe the vertical structure of the NPH. Secondly, column densities are determined by monitoring the intensity of various spectral features associated with the ice composing the NPH, against a strong background with similar features from the frost that has condensed on the surface in the winter season, resulting in low sensitivities. Limb observations removes both limitations, allowing us to study the vertical distribution of the aerosols that make up the NPH at high sensitivities.We present new limb observations of the NPH by IUVS (Imaging Ultraviolet Spectrograph) on the MAVEN (Mars Atmospheric and Volatile Evolution) spacecraft. These observations represent the first ultraviolet limb observations of the NPH, opening a new window for understanding the structure and composition of the NPH. The observations are also of the twilight limb, with sunlight being scattered from the dayside into the nightside over large solar zenith angles. This illumination geometry allows us to avoid the high dayside intensities that would drown out the signal from the thinner sections of the NPH. We determine the latitudinal extent of the NPH to be 30-60°N. We also find that an exponential altitude distribution of aerosols is able to reproduce the observed intensities, with a scale height similar to the atmospheric scale height. Finally, we observe an almost mutual exclusion of the NPH and nitric oxide nightglow emissions, an effect of the global circulation that drive both phenomena. [less ▲]

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See detailA study of ion emissions in MAVEN/IUVS data
Connour, Kyle; Schneider, Nicholas M.; Deighan, Justin et al

in AAS/Division for Planetary Sciences Meeting Abstracts (2016, October 01)

The Imaging Ultraviolet Spectrograph (IUVS) instrument on the Mars Atmosphere and Volatile EvolutionN (MAVEN) mission is designed to measure radiances of several of the most abundant species present in ... [more ▼]

The Imaging Ultraviolet Spectrograph (IUVS) instrument on the Mars Atmosphere and Volatile EvolutionN (MAVEN) mission is designed to measure radiances of several of the most abundant species present in Mars' atmosphere. Many spectral features are associated with ions; one of the most prominent spectral features in the mid-ultraviolet region is the CO[SUB]2[/SUB][SUP]+[/SUP] Ultraviolet Doublet (UVD) at 289 nm. However this emission, and many others, results from several radiative processes, some of which originate from the ionization process and is therefore not diagnostic of the ion densities. Several other emissions are diagnostic of ion densities, especially at high altitudes, and therefore lend themselves to density retrievals based on inclusion of all radiative processes. The most promising of these is the Fox-Duffendack-Barker (FDB) (3,0) band at 314 nm, near the long-wavelength limit of the IUVS instrument. We report on a new process for performing density retrievals of CO[SUB]2[/SUB][SUP]+[/SUP] with particular attention to the credibility of high-altitude signal in the FDB bands as well as the associated uncertainties. We also investigate the feasibility of C[SUP]+[/SUP] and other ion density retrievals. [less ▲]

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See detailLRP4 mutations in bilateral renal agenesis with severe limb deficiencies
JACQUINET, Adeline ULg; LEE, Anna F.; SWENERTON, Anna et al

Poster (2016, October)

Introduction : Severe limb deficiencies have been reported in association with bilateral renal agenesis in several syndromes. Recently, truncating mutations in LRP4 have been associated with a lethal ... [more ▼]

Introduction : Severe limb deficiencies have been reported in association with bilateral renal agenesis in several syndromes. Recently, truncating mutations in LRP4 have been associated with a lethal autosomal recessive form of Cenani-Lenz syndrome (CLS). The objectives of our study was to delineate the phenotype of the third fetus, and through a search of syndromes, identify a group of disorders with overlapping phenotypes that may be allelic with CLS or due to mutations in the same pathway. Results : A male fetus at 22 weeks’ gestation was found to have bilateral renal agenesis by ultrasound. The pregnancy was interrupted and autopsy and skeletal survey revealed shortening of forearms and legs below the knees, radioulnar synostosis, foreshortened triangular shaped tibia and fibula, and oligosyndactyly with disorganized metacarpals, metatarsals and phalanges. Bilateral renal agenesis, absent ureters and small bladder were confirmed. Additional features included downslanting palpebral fissures, high-arched palate, small mouth, low-set and posteriorly rotated ears, nuchal oedema, pulmonary hypoplasia, hypospadias and absent olfactory nerves. An autosomal recessive disorder was suspected, given a prior obstetric history of termination at 18 weeks for unilateral limb anomalies and cleft lip. Based on the aforementioned renal and limb anomalies, the lethal form of CLS was considered. Sequencing of LRP4 identified a paternally inherited variant (c.919+3G del) and a maternally inherited variant (c.4808T>A ;p.Ile1603Val). Both variants were rare in the general population and bioinformatically predicted to be damaging. We compared the phenotype with the two previously reported fetuses as well as with syndromes and disorders that may present prenatally with genitourinary anomalies plus acromesomelia of upper and lower limbs. We found significant overlap with a subset of cases of acro-renal-uterine-mandibular syndrome presenting with high-arched palate plus or minus micrognathia and microglossia, severe limb anomalies affecting the middle and distal segments, oligosyndactyly, renal agenesis, uterine anomalies and absence of olfactory nerves. Conclusion : Based on the clinical features seen in three lethal cases of CLS, we propose that acro-renal-uterine-mandibular syndrome may be allelic with CLS or due to mutations in the molecular pathway involving LRP4. [less ▲]

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See detailComportement clinique des couronnes monolithiques en zircone
KOENIG, Vinciane ULg; Wulfman, Claudine; MAINJOT, Amélie ULg

in Les entretiens d'Odontologie-Stomatologie 2016 (2016, October)

Les études cliniques sur les couronnes et les bridges en zircone Y-TZP ont indiqué des taux d'échecs élevés liés aux fractures cohésives de la céramique d’émaillage (chipping). Pour remédier à ce problème ... [more ▼]

Les études cliniques sur les couronnes et les bridges en zircone Y-TZP ont indiqué des taux d'échecs élevés liés aux fractures cohésives de la céramique d’émaillage (chipping). Pour remédier à ce problème, les fabricants commercialisent des couronnes monolithiques, entièrement en zircone, qui sont simplement maquillées en surface. Cependant, ces restaurations sont suspectées d’être plus sensibles à la fatigue hydrique de la zircone, problème qui aboutit à une baisse des propriétés mécaniques et qui fut à l’origine de nombreux échecs avec les prothèses de hanche. En effet, l’absence de céramique d’émaillage sur les couronnes monolithiques les rend plus vulnérables vis à vis du milieu oral ; de plus, certaines zircones de haute translucidité, spécifiquement développées pour cette indication, sont réputées plus sensibles en raison d’une plus grande métastabilité. Enfin, le recul clinique sur ces restaurations est très faible et leur comportement général, notamment en terme d’usure des dents antagonistes, a besoin d’être étudié. Une étude clinique est actuellement menée à l’Université de Liège, en collaboration avec l’Université Paris Descartes, afin d’évaluer le comportement clinique de la zircone non émaillée en milieu buccal, et particulièrement la fatigue hydrique, sur une période de 5 ans. Les résultats à très court terme (6 mois) mettent en évidence le bon comportement clinique des restaurations monolithiques en zircone, avec cependant une usure rapide de la glaçure, ce qui pourrait promouvoir la fatigue hydrique. Les zones de transformation cristalline détectées soulignent la nécessité d’une cuisson de régénération de la zircone suite aux ajustements occlusaux par fraisage. [less ▲]

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See detailCation-doped Cu2O as a transparent p-type semiconducting oxide with enhanced performances: A comparison between strontium and magnesium incorporation
Avelas Resende, João ULg; Brochen, Stéphane; Bergerot, Laurent et al

Conference (2016, October)

In the group of semiconducting metallic oxides, cuprous oxide (Cu2O) presents promising electrical and manufacturing features for a variety of applications as p-type transparent material suitable in the ... [more ▼]

In the group of semiconducting metallic oxides, cuprous oxide (Cu2O) presents promising electrical and manufacturing features for a variety of applications as p-type transparent material suitable in the domains of transparent electronics and photovoltaic cells. However Cu2O suffers from optical and electrical limitations, due to a relatively small bandgap of 2.17 eV and a fairly high resistivity (> 102 Ω.cm) in intrinsic thin films at room temperature. In this work, we successfully doped Cu2O thin films with different divalent cations, namely Sr and Mg, by metal-organic chemical vapour deposition. We compared the effects of each element on crystallographic structure, films morphology, electronic transport and optical transmittance. In both cases, the presence of the cation contributed to a higher stability of the Cu2O phase, reducing the appearance of CuO parasitic phase. Nevertheless, a SrCO3 phase was detected in the Sr doped system. In terms of electrical properties, the incorporation of Sr, up to 16%, reduced the resistivity down to 1Ω.cm, with a mobility of 16 cm2.V-1.s-1. Moreover, the incorporation of strontium also leads to the emergence of a with a deep acceptor level located around EA = 278 ± 21 meV above the top of the valence band. The concentration of this deep acceptor level, attributed to simple copper vacancies, drastically increases with the strontium content, due to a decrease of its formation energy. The effect on optical transmittance could not be detected. The Mg-doped Cu2O thin films were monophasic and showed a higher resistivity of 6.6 Ω.cm at an Mg concentration of 17%, due to the lower mobility, 1 cm2.V-1.s-1. Although, the presence of this dopant contributes for the highest charge-carrier density observed in this work, up to 8x1017 cm-3. As in the Sr case, this can be explained by a simple copper vacancy doping mechanism assisted by cation incorporation. Additionally, a slight increase of transparency is observed when compared to intrinsic Cu2O. The control of carrier concentration and mobility values by dopant concentration, as well as the improvements in phase stability and transparency are key factors for the application of this versatile p-type oxide in transparent electronics and solar cells applications. [less ▲]

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See detailHistorical Mortars in Wallonia (Belgium): A New Archaeological Approach. The Case of the Mediaeval Fortress of Pont-de-Bonne (Belgium, Province of Liège)
Demelenne, Marie; Bossiroy, Dominique; Dagrain, Fabrice et al

in Papayianni, Ioanna; Stefanidou, Maria; Pachta, Vasiliki (Eds.) 4th Historic Mortars Conference HMC2016 (2016, October)

This paper deals with an innovative methodology dedicated to the study of historical mortars. Gathering macroscopic observation, petrography in thin sections, chemical analyses as well as physical and ... [more ▼]

This paper deals with an innovative methodology dedicated to the study of historical mortars. Gathering macroscopic observation, petrography in thin sections, chemical analyses as well as physical and mechanical data namely obtained with non destructive technologies developed for the petroleum industry, it allows cross-interpretation that can effectively contribute to archaeological research through correlations with the age, the function, the technology and the provenance of each mortar sample collected on a studied site. Following a synthetic description of the proposed approach, a practical application is illustrated on the site of a mediaeval fortress located in Belgium. [less ▲]

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See detailClassification criteria for neurogenic claudication caused by lumbar spinal stenosis
Genevay, Stéphane; Courvoisier, Delphine; Konstantinou, Kika et al

in 9th Interdisciplinary World Congress on Low Back And Pelvic Girdle Pain (2016, October)

BACKGROUND Classification criteria are recommended for diseases that lack highly specific biomarkers in order to improve homogeneity in clinical research. Since imaging evidence of lumbar spinal stenosis ... [more ▼]

BACKGROUND Classification criteria are recommended for diseases that lack highly specific biomarkers in order to improve homogeneity in clinical research. Since imaging evidence of lumbar spinal stenosis (LSS) or lumbar disc herniations (LDH) may not be associated with symptoms, clinical classification criteria based upon patient symptoms and physical examination findings are required. This study sought to develop a set of criteria identifying patients with neurogenic claudication (NC) caused by LSS and patient with radicular pain (RP) caused by LDH. This abstract reports the results concerning NC caused by LSS. METHODS Phase 1: Nineteen spine specialists (clinicians and researchers) from 8 countries participated in a Delphi process, using an internet program, to rank symptoms and signs which suggest LSS as the cause of NC or DH as the cause of RP. Phase 2: Nineteen different spine specialists (surgeons and non-surgeons) from 5 countries recruited patients during office visits and classify them with a high degree of confidence as having with either: 1) NC caused by LSS 2) RP caused by LDH or 3) non-specific low back pain (NSLBP) with non-specific leg pain radiation. Patients completed survey items and specialists documented examination signs. Signs and symptoms present in ≥ 10 patients were analyzed by using Generalized Estimating Equations (GEE). Patients with NC caused by LSS or NSLBP served as controls. Items with p<0.1 in univariate analysis were entered in the multivariate analysis. A score to predict NC caused by LSS was developed based on the coefficient of the GEE, and used to obtain a ROC curve and the associated area under the curve (AUC). RESULTS A list of 46 clinical signs and 28 patient-reported symptoms were selected by the group of spine specialists during the 1st phase. For the 2nd phase, 209 patients with high confidence in the diagnosis were included 63 NC caused by LSS, 89 RP caused by DH, and 57 NSLBP with non-specific leg pain radiation. Items which predicted NC with a p-value <0.1 included age >60, bilateral leg pain, leg pain relieved by sitting, leg pain decreased by leaning or flexing, positive30 seconds extension test, negative straight leg raise test. The score had an AUC of 0.91, and the cutoff to obtain a specificity of 92.1% resulted in a sensitivity of 80.0%. CONCLUSION An international collaboration of surgeon and non-surgeon spine specialists produced a set of diagnostic criteria with high specificity and sensitivity for identifying patients with NC caused by LSS. Using this set could improve the quality of basic science and clinical research in this field by improving homogeneity within groups of patients. [less ▲]

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See detailGestion du stress professionnel : sensibilisation aux processus psychologiques et outils de gestion dérivés
Brouette, Béatrice ULg; Stassart, Céline ULg; Dethier, Marie ULg et al

in Etienne, Anne-Marie; Bragard, Isabelle (Eds.) Evolutions sociales, Innovations et Politiques: nouvelles questions et nouveaux enjeux pour la psychologie de la santé. (2016, October)

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See detailUnexpected high levels of Cobalamin (Vitamin B12): Numerous interferences are decreased by PEG treatment.
LADANG, Aurélie ULg; VRANKEN, Laura ULg; CAVALIER, Etienne ULg

Poster (2016, October)

Cobalamin (Vitamin B12) deficiency is a common cause of anemia. High levels of serum cobalamin is mainly due to cobalamin supplementation. It has also been associated with hematological malignancies ... [more ▼]

Cobalamin (Vitamin B12) deficiency is a common cause of anemia. High levels of serum cobalamin is mainly due to cobalamin supplementation. It has also been associated with hematological malignancies, liver or renal diseases. Cobalamin is sometimes found elevated in autoimmune disorders and infectious diseases but concerns are raised on the fact that those serum increases might be due to interference with immunoassays. Those data’s shed the lights on the high prevalence of interference in patients with unexpected high cobalamin level. Precipitation with PEG appears to be an easy and costless method to increase the reliability of cobalamin dosage. In accordance with our results, we recommand to treat systematically every serum with a cobalamin >1500 ng/L. [less ▲]

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See detailAgent-based analysis of dynamic access ranges to the distribution network
Mathieu, Sébastien ULg; Ernst, Damien ULg; Cornélusse, Bertrand ULg

in Proceedings of the 6th European Innovative Smart Grid Technologies (ISGT) (2016, October)

There is a need to clearly state an interaction model that formalizes interactions between actors of the distribution system exchanging flexibility. In previous works we quantitatively evaluated the ... [more ▼]

There is a need to clearly state an interaction model that formalizes interactions between actors of the distribution system exchanging flexibility. In previous works we quantitatively evaluated the performance of five interaction models devised with industrial partners using the agent-based testbed DSIMA. Simulation results showed that these interaction models relying on active network management suffer from a lack of coordination between the distribution and the transmission system operator, activating flexibility simultaneously in opposite directions. This paper introduces a new interaction model fixing this issue based on dynamic access bounds to the network changing throughout the day and preventing the activation of flexibility leading to congestions. This new interaction model is implemented in DSIMA and compared to a model restricting the grid users to a very restrictive but safe access range. Results show that this new model allows to safely increase by 55% the amount of distributed generation in the network. [less ▲]

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See detailThe peroxisome proliferator-activated receptor Alpha (PPARA) is expressed in non-somatotroph pituitary adenomas : a potential therapeutic target ?
Rotondi, S; Polidoro, MA; Morace, R et al

Poster (2016, October)

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See detailUtilisation de la cabergoline dans le traitement palliatif de la maladie de Cushing : l'étude Frenchcab
Ferriere, A; Cortet, C; Chanson, P et al

in Annales d'Endocrinologie : 33ème congrès de la Société Française d'Endocrinologie (2016, October)

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See detailUsing PCB signatures and enantiomer fractions for source identification and to age date exposure
Megson, D; Focant, Jean-François ULg; Patterson, D et al

Conference (2016, October)

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See detailHypogonadism due to a novel inactivating mutation of the luteinizing hormone beta subunit (LHB) gene leading to impaired protein trafficking
Potorac, Iulia ULg; Rivero-muller, a; Trehan, A et al

in 26nd meeting of the Belgian Endocrine Society - Abstract book (2016, October)

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See detailStudy of the effect of thin ALD oxide coatings on the stability of silver nanowire based transparent electrodes
Aghazadehchors, Sara; Nguyen, Viet; Lagrange, Mélanie et al

Poster (2016, October)

Current research on new Transparent Conductive Materials focuses on emerging materials such as carbon-based materials, graphene or metallic nanowire networks. The latter concern mainly silver nanowires ... [more ▼]

Current research on new Transparent Conductive Materials focuses on emerging materials such as carbon-based materials, graphene or metallic nanowire networks. The latter concern mainly silver nanowires (AgNW). Although AgNW networks seem to approach ITO values in terms of optical transparency and electrical sheet resistance, (90% and 10 Ω/sq respectively) [1], overcoming a rather poor thermal and electrical stability still remains a challenge. While most device fabrication processes require thermal annealing steps to optimize their electrical properties, heating can modify AgNW network morphology. Moreover, when used as transparent heaters, an electrical current induces specimen heating (due to Joule effect) and then imposing AgNW network to be resistant to heat. One way to improve thermal stability of AgNW networks is to use a thin layer of a passivating metal oxide (such as ZnO or TiO2) which induces stability improvements [2]. So far, our group has studied the effect of a thin layer of TiO2 deposited by ALD on the thermal and electrical stability of AgNWs networks. Our studies show that even a TiO2 layer as thin as 5 nm can lead to an extension of thermal stability from 270 °C to 420 °C. The oxide coating also increases the value of the electrical failure voltage. This stability enhancement comes with nearly no change in optical transparency (less than 1%). Currently we are replacing the ALD deposition method with a new approach called Spatial ALD (SALD). This technique does not require vacuum, it is much faster than conventional ALD and is easily scalable [3]. Here we will present a comprehensive study of the effect of deposition parameters, passivation film thickness on the electrical and optical properties of AgNWs based transparent electrodes. Optimized parameters will allow the integration in devices such as transparent heaters. We will demonstrate that adding a passivation layer increases the breakdown voltage, making the devices stable at higher voltage or temperature. References: [1] Lagrange, M., Langley, D. P., Giusti, G., Jiménez, C., Bréchet, Y., & Bellet, D. (2015). Optimization of silver nanowire-based transparent electrodes: effects of density, size and thermal annealing. Nanoscale, 7(41), 17410- 17423. [2] Kim, A., Won, Y., Woo, K., Kim, C. H., & Moon, J. (2013). Highly transparent low resistance ZnO/Ag nanowire/ZnO composite electrode for thin film solar cells. ACS nano, 7(2), 1081-1091. [3] Muñoz-Rojas, D., & MacManus-Driscoll, J. (2014). Spatial atmospheric atomic layer deposition: a new [less ▲]

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See detailMaladie de Cushing et kyste de la poche de Rathke : un défi diagnostique
VROONEN, Laurent ULg; KREUTZ, Julie ULg; Potorac, Iulia ULg et al

in Annales d'Endocrinologie : 33ème congrès de la Société Française d'Endocrinologie (2016, October)

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See detailRegulation of breast carcinoma cell proliferation and apoptosis by type I collagen aging and 3D confinement involves differential activation of DDR1
Saby, Charles; Rammal, Hassan; Magnien, Kevin et al

Poster (2016, October)

During breast carcinoma development, cells are confronted to a type I collagen-rich environment which induces anti-proliferative and pro-apoptotic effects (Maquoi et al., Oncogene, 2012). These effects ... [more ▼]

During breast carcinoma development, cells are confronted to a type I collagen-rich environment which induces anti-proliferative and pro-apoptotic effects (Maquoi et al., Oncogene, 2012). These effects occurred only in 3D cell matrix and involved Discoidin Domain Receptor 1 (DDR1) but not β1 integrin (Assent et al., PlosOne, 2015). During aging, type I collagen undergoes post-translational modifications which have a detrimental effect on type I collagen fibrillar organization (Aït-Belkacem, J Biomed Optics, 2012 ; Guilbert et al., Oncotarget, 2016). This property is well known to be requested to activate DDR1. Here, we address the effect of type I collagen aging on cell proliferation inhibition and apoptosis induction in breast carcinoma cells in 3D cell confinement system. Type I collagen was extracted from tail tendons of 2 months (adult) and 2 years (old) rats, and MCF-7 and ZR-75-1 cells were used as an experimental model. We provide evidence for a decrease in cell proliferation by adult collagen but not by old one. This effect involves a higher phosphorylation of DDR1 by adult collagen when compared to the old one. Inhibition of DDR1 kinase activity by the specific inhibitor DDR1-IN-1 induced an increase in cell proliferation to a level similar to that observed in old collagen. An increase in cell proliferation was also observed using siRNA targeting DDR1 mRNA. At the opposite of old collagen, adult collagen was also able to trigger apoptosis by inducing an increase in expression of the pro-apoptotic protein (BIK). Inhibition of DDR1 kinase activity induced a decrease in BIK expression and apoptosis. Our data support the concept that aging contributes to the loss of the growth suppression and apoptotic effect of collagen on breast carcinoma, but only in 3D cell confinement model, by inactivating the DDR1-BIK signaling axis via a downregulation of DDR1 activation. [less ▲]

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See detailLe syndrome de De Morsier : une cause congénitale méconnue d'hypopituitarisme
VALDES SOCIN, Hernan Gonzalo ULg; VERLOES, Alain ULg; Debray, François-Guillaume ULg et al

in Annales d'Endocrinologie : 33ème congrès de la Société Française d'Endocrinologie (2016, October)

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See detailOceanBrowser: on-line visualization of gridded ocean data and in situ observations
Barth, Alexander ULg; Watelet, Sylvain ULg; Troupin, Charles et al

Conference (2016, October)

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See detailLes dernières évolutions en droit européen en matière d'assurance protection juridique
Wildemeersch, Jonathan ULg

in Wildemeersch, Jonathan (Ed.) L'assurance protection juridique : quid pour demain? (2016, October)

L'assurance protection juridique est régie par une directive européenne. Comment la Cour de justice interprète-t-elle le principe du libre choix de l'avocat imposé par la directive ? Tel est l'objet de ... [more ▼]

L'assurance protection juridique est régie par une directive européenne. Comment la Cour de justice interprète-t-elle le principe du libre choix de l'avocat imposé par la directive ? Tel est l'objet de cette contribution. [less ▲]

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See detailTransparent electrodes based on silver nanowire networks: from fundamental aspects to integration into device
Sannicolo, T.; Lagrange, M.; Xian, S. et al

Conference (2016, October)

The past few years have seen a considerable amount of research devoted to nanostructured transparent conducting materials which play a pivotal role in many modern devices such as: solar cells, flexible ... [more ▼]

The past few years have seen a considerable amount of research devoted to nanostructured transparent conducting materials which play a pivotal role in many modern devices such as: solar cells, flexible light-emitting devices, touch screens and flexible transparent thin film heaters. Metallic nanowire networks have recently been a heavily researched subject. Currently, the most commonly used material for such applications is Tin-doped Indium oxide (ITO). Although ITO exhibits very good physical properties, indium scarcity and brittleness have prompted the search for alternative materials. Among emerging transparent electrodes, silver nanowire (AgNW) networks appear as a promising substitute to ITO since these percolating networks exhibit excellent properties with sheet resistance of a few Ω/sq and optical transparency of 90%, fulfilling the requirements for many applications. It also shows very good electro-mechanical properties. In addition, the fabrication of these electrodes involves low-temperature process steps and upscaling methods, thus making them very appropriate for future use as TE for flexible devices. Our research is focused on the fundamental understanding of the physical phenomena taking place at the scales of both the network (macroscale) and the NW-to-NW junctions (nanoscale), and on the ability of AgNW networks to be integrated as transparent electrodes for different applications. In-situ electrical measurements performed during optimisation process such as thermal annealing provide useful information regarding the activation process of the junctions. This contribution aims at presenting a short overview of the main properties and applications of metallic nanowire networks, as well as the integration in devices. [less ▲]

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See detailFaut-il suivre par IRM hypophysaire les patients porteurs de macroprolactinome dont l'hypersécrétion est contrôlée médicalement ?
Eroukhmanoff, J; Tejedor, I; Potorac, Iulia ULg et al

in Annales d'Endocrinologie : 33ème congrès de la Société Française d'Endocrinologie (2016, October)

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See detailIT Manager Crisis Leadership: Do Prescriptions Given for General Management Apply?
Tapanainen, Tommi ULg; Hosoya, Ryuichi; Kamioka, Taro et al

Conference (2016, October)

Earthquakes are destructive events, but can also give opportunities for learning in crisis management for organizational information technology (IT) functions. In their role as stewards of company data ... [more ▼]

Earthquakes are destructive events, but can also give opportunities for learning in crisis management for organizational information technology (IT) functions. In their role as stewards of company data and IT, it is important that IT managers participate in company crisis management activities. However, the role of IT managers in crisis management is not well understood. This paper addresses IT manager actions during the crisis response effort, when appropriate actions need to be taken at short notice. Recognizing that few guidelines exist for IT manager leadership in these situations, we attempt to fit leadership recommendations intended for the general management to five cases of IT manager crisis response activity during earthquakes. We find that several recommendations from this set were relevant also for IT managers, showing that IT managers can learn from crisis response lessons derived from the general management. [less ▲]

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See detailUsing images to analyze images. Semiotics meets Cultural Analytics
Dondero, Maria Giulia ULg

in Reyes-Garcia, Everardo; Châtel-Innocenti, Pierre; Zreik, Khaldoun (Eds.) Archiving and Questioning Immateriality - Proceedings of the 5th Computer Art Congress (2016, October)

In our text we examine image visualizations generated from big collections of archived images produced by Lev Manovich and his team in the field of Cultural Analytics. Our aim is to examine how these ... [more ▼]

In our text we examine image visualizations generated from big collections of archived images produced by Lev Manovich and his team in the field of Cultural Analytics. Our aim is to examine how these image visualizations function as analysis-images from two correlated perspectives of one semiotic approach: 1. Enunciation. What point of view is conveyed by the image visualizations about the computer-manipulated archive images? 2. Rhetorical/mereological composition: What is the mereological relation between the final visualization and the multitude of images that it contains, filters, or manipulates? [less ▲]

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See detailQuality Control Laboratories involved in the WHO Prequalification
Marini Djang'Eing'A, Roland ULg

Conference (2016, October)

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See detailNovel innovative possibilities for the dairy industry opened by common format of FT-MIR instruments
Grelet, Clément ULg; Fernandez Pierna, Juan Antonio; Dardenne, Pierre et al

Poster (2016, October)

FT-MIR technology is worldwide used for fast and cost effective determination of major milk components. However, due to the different individual response of each instrument the potential of this ... [more ▼]

FT-MIR technology is worldwide used for fast and cost effective determination of major milk components. However, due to the different individual response of each instrument the potential of this technology is currently underexploited as new tools cannot be easily ported to other instruments. Recently a standardization method was developed in order to harmonize the spectral response format between instruments of different brands and models but also across time for each spectrometer. The method matches monthly the infrared response of all spectrometers on the response of a reference instrument, making all machines talking a common language. The objective is to allow the creation and the use of common, new and innovative concepts by pooling resources and sharing data. Using this method, new tools for analysis of milk quality and milk technological properties have been created and shared within the network, as fatty acids and minerals predictions or milk coagulation properties. New concepts requiring a common spectral format have been developed like the untargeted detection of milk contaminant and abnormal milk or the determination of milk geographic origin. Models in relation with the status of the dairy cow were also created and shared as to predict ketosis, negative energy balance or methane emissions. Therefore models can be developed at one place and deployed within the entire network, in which 90 instruments are currently monthly standardized. [less ▲]

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See detailAutologous osteoblastic cells (PREOBy) versus concentrated bone marrow implantation in osteonecrosis of the femoral head: A randomized study
HAUZEUR, Jean-Philippe ULg; Tungouz, Michel; LECHANTEUR, Chantal ULg et al

in Revue de Chirurgie Orthopédique et Traumatologie (2016, October), 102

In non-traumatic osteonecrosis of the femoral head (ONFH), implantation of bone marrow concentrate (BMC) containing mesenchymal stem cells (MSC) could delay ONFH progression and improve symptoms (Hernigou ... [more ▼]

In non-traumatic osteonecrosis of the femoral head (ONFH), implantation of bone marrow concentrate (BMC) containing mesenchymal stem cells (MSC) could delay ONFH progression and improve symptoms (Hernigou 2002, Gangji 2004). The next step was to assess the hypothesis that a population of autologous osteoblastic cells (OB) consisting in a more differentiated cell than MSC, could be more efficacious than BMC in early stages ON. [less ▲]

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See detailHypogonadisme hypogonadotrope anosmique associé à une nouvelle mutation hétérozygote c.937C>T, p.His314Tyr de l'isoforme IIIb du gène FGR1.
VALDES SOCIN, Hernan Gonzalo ULg; CORMAN, Vinciane ULg; LIBIOULLE, Cécile ULg et al

in Annales d'Endocrinologie : 33ème congrès de la Société Française d'Endocrinologie (2016, October)

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See detailA review of Silurian dispersed spore assemblages from the Arabian Plate: biostratigraphy and palaeogeography
Wellman, CH; Steemans, Philippe ULg; Breuer, P et al

Conference (2016, October)

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See detailInvestigating the potential of Cymodocea nodosa (Ucria) Ascherson as a coastal carbon sink coupling marine habitat cartographies and in situ nondestructive sampling
Abadie, Arnaud ULg; Richir, Jonathan ULg; Pieraccini, Riccardo ULg et al

Poster (2016, October)

Seagrass meadows are major carbon sinks, trapping about 10% of the total CO2 sequestrated in the oceans. In the Mediterranean, a major focus has been made on the climax species Posidonia oceanica (L ... [more ▼]

Seagrass meadows are major carbon sinks, trapping about 10% of the total CO2 sequestrated in the oceans. In the Mediterranean, a major focus has been made on the climax species Posidonia oceanica (L.) Delile, while other species remained little studied. In the framework of the STARECAPMED project, we thus chose to study Cymodocea nodosa (Ucria) Ascherson, a pioneer species with a rapid turnover and an expected high stocking capacity. Furthermore, the area covered by that species has been largely underestimated. In order to fill these two knowledge gaps, we first mapped all seagrass habitats within a Mediterranean bay (Calvi, Corsica, France) using side scan images, aerial photographs and ground truths. This cartography was followed by seasonal in situ density measurements and non-destructive shoot sampling (leaf cutting). Samplings were performed at different depths (5 to 23 m depth) in 6 contrasted stations (small patchy meadows to continuous beds) in order to cover all the existing facies of the bay. Elementary contents (carbon, nitrogen and stable isotope ratios) were measured in laboratory. This first work shows that C. nodosa meadows in Calvi Bay cover an area of 0.498 km2. Carbon stocks of the leaves reached 0.25 tons in winter and 2.72 tons in summer. Their nitrogen contents showed a marked seasonality with a maximum value of 0.020 mgN.m-2 in July and a minimum value of 0.005 mgN.m-2 in March. Some modifications in the trophic conditions of the water column at several stations were put in an obvious through the N stable isotopes values, mostly during the summer period. The actual underestimation of the area covered by that species in Calvi Bay has been properly mapped thanks to side scan sonar techniques revealing, together with elementary content analysis, its importance in the carbon balance of coastal areas. [less ▲]

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See detailSmall-angle scattering analysis of empty or loaded hierarchical porous materials
Gommes, Cédric ULg

Conference (2016, October)

Small-angle scattering (SAXS or SANS) is one of the few experimental methods available for the nanometer-scale study of physicochemical phenomena inside porous solids. Its potential, however, is often ... [more ▼]

Small-angle scattering (SAXS or SANS) is one of the few experimental methods available for the nanometer-scale study of physicochemical phenomena inside porous solids. Its potential, however, is often limited by the lack data analysis methods to convert scattering data into real-space structural information. This is notably the case for most porous materials of practical interest, which exhibit a hierarchical structure with micro, meso, and macropores, with often a secondary material confined in the pores, such as in supported catalysts, as well as fuel-cell and battery materials. Here, we discuss a general SAXS data analysis methodology for this type of material. Assuming that each structural level is statistically independent from the others and has a distinct characteristic length scale, compact mathematical expressions are derived for the scattering of the entire hierarchical structure [J.Phys.Chem.C, in press]. The method is illustrated with the SAXS analysis of SBA-15 micro- and meso-porous silica loaded with copper nitrate, as well as to supported catalysts obtained after calcining that material. The SAXS analysis shows that the nitrate permeates both the micro and mesopores, while the metallic copper obtained after calcination is found only in the mesopores. Moreover, the spatial distribution of the metal depends on the specifics of the calcination, as confirmed by electron tomography [Angew.Chem. 54 (2015) 11804]. The general methodology will be of interest to anyone interested in the quantitative analysis of small-angle scattering data from empty or loaded porous solids, and from any type of hierarchical material. [less ▲]

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See detailPotential for Composite Analysis in the Black Sea
Capet, Arthur ULg; Mason, Evan; Troupin, Charles et al

Conference (2016, October)

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See detailMultimodal Connectivity-Based Parcellation of the Brain
Reuter, Niels; Plachti, Anna; Genon, Sarah ULg et al

Poster (2016, October)

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See detailLe droit public et le tiers. Rapport belge
Bouhon, Frédéric ULg

in Les tiers. Journées panaméennes (2016, October)

Le présent rapport envisage le rôle du tiers en droit public belge, en se focalisant sur les trois thématiques retenues par le rapporteur général : le tiers et la norme (I), l’intérêt du tiers (II) et ... [more ▼]

Le présent rapport envisage le rôle du tiers en droit public belge, en se focalisant sur les trois thématiques retenues par le rapporteur général : le tiers et la norme (I), l’intérêt du tiers (II) et l’exécution de tâches publiques et le tiers (III). [less ▲]

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