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See detailForeign Policy & International Development
Carlsen, Henrik; Pearson, Nakia ULg

in High-end Climate Change Policy Booklet (2017)

The conceptual framework for the chapter is based on the notion of “transnational climate impacts” (Benzie et al, 2016). By this we mean impacts that will require adaptation in the EU as a result of ... [more ▼]

The conceptual framework for the chapter is based on the notion of “transnational climate impacts” (Benzie et al, 2016). By this we mean impacts that will require adaptation in the EU as a result of climate change in other countries. [less ▲]

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See detailProfiling inferior left dorsal premotor cortex: when Area 55b meets Premotor Eye-Field
Genon, Sarah ULg; Reid, Andrew; Langner, Robert et al

Poster (2017, June)

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See detailRegistered partnerships
Wautelet, Patrick ULg

in Basedow, Jürgen; Ferrari, Franco; de Miguel Asensio, Pedro (Eds.) et al EUROPEAN ENCYCLOPEDIA OF PRIVATE INTERNATIONAL LAW (2017)

This entry in the European Encyclopedia of Private International Law attempts to present the current state of the law in relation to registered partnerships. After an overview of the relevant sources ... [more ▼]

This entry in the European Encyclopedia of Private International Law attempts to present the current state of the law in relation to registered partnerships. After an overview of the relevant sources, attention is paid to the issue of characterization. The law applicable to the access to partnerships and effects of such partnerships is also covered. [less ▲]

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See detailA decision support tool for transient stability preventive control
Pertl, Michael; Weckesser, Johannes ULg; Rezkalla, Michel et al

in Electric Power Systems Research (2017), 147

The paper presents a decision support tool for transient stability preventive control contributing to increased situation awareness of control room operators by providing additional information about the ... [more ▼]

The paper presents a decision support tool for transient stability preventive control contributing to increased situation awareness of control room operators by providing additional information about the state of the power system in terms of transient stability. A time-domain approach is used to assess the transient stability for potentially critical faults. Potential critical fault locations are identified by a critical bus screening through analysis of pre-disturbance steady-state conditions. The identified buses are subject to a fast critical contingency screening determining the actual critical contingencies/buses. These two screenings aim at reducing the computational burden of the assessment, since only contingencies considered as critical are taken into account. The critical clearing times for the critical contingencies are determined. A preventive re-dispatch of generators to ensure a predefined minimum critical clearing time for faults at all buses is proposed, while costs are minimized. The results of the assessment are presented to the control room operator, who decides to accept the suggested dispatch or to repeat the assessment considering additional user-specific constraints. The effectiveness of the proposed method is demonstrated on a standard nine-bus and the New England test system. [less ▲]

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See detailNumerical modelling of micro-plasto-hydrodynamic lubrication in plane strip drawing
Carretta, Yves ULg; Bech, Jakob; Legrand, Nicolas et al

in Tribology International (2017), 110

This paper presents a new finite element model capable of predicting the onset of micro-plasto-hydrodynamic (MPH) lubrication and the amount of lubricant escaping from surface pockets in metal forming ... [more ▼]

This paper presents a new finite element model capable of predicting the onset of micro-plasto-hydrodynamic (MPH) lubrication and the amount of lubricant escaping from surface pockets in metal forming. The present approach is divided in two steps. First, a simulation at the macroscopic level is conducted. Then, a second simulation highlighting microscopic liquid lubrication mechanisms is achieved using boundary conditions provided by the first model. These fluid-structure interaction computations are made possible through the use of the Arbitrary Lagrangian Eulerian (ALE) formalism. The developed methodology is validated by comparison to experimental measurements conducted in plane strip drawing. The effect of physical parameters like the drawing speed, the die angle and the strip thickness reduction is investigated. The numerical results show good agreement with experiments. [less ▲]

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See detailNew data on the Mesozoic radiation of chelonioids
Scavezzoni, Isaure ULg; Fischer, Valentin ULg

Poster (2017, June)

"Turtles" (Testudines) form a successful group of reptiles with several terrestrial, marine and fresh-water species. Their peculiar and somewhat constrained morphology (i. e. : carapace incorporating ribs ... [more ▼]

"Turtles" (Testudines) form a successful group of reptiles with several terrestrial, marine and fresh-water species. Their peculiar and somewhat constrained morphology (i. e. : carapace incorporating ribs, curved limbs, anapsid skull exempt of temporal fenestrae) and ecology has often obscured their relationships and, hence, their evolutionary history, notably in marine turtles (chelonioids). Modern chelonioids are divided in two clades (i. e. : shoft-shelled turtles and hard-shelled turtles) supported by distinct morphological and embryological characters. Their origin is traced back up to the Cretaceous, along with a series of extinct forms, many of which being collectively known as Protostegidae. Fossil evidence show that at least five clades of marine turtles were roaming the seas at the end of the Cretaceous. In fact, chelonioids appeared during the first stages of the Early Cretaceous and quickly exploded to reach a high level of disparity at the lowermost part of the late Cretaceous. Therefore, the Mesozoic radiation of chelonioids must have happened during the "middle" Cretaceous (especially the Aptian-Albian interval). However this radiation is poorly understood as the phylogenetic relationships of marine turtles are not resolved yet. Bringing new data may help resolve these issues, and it is the exact reason why the genus Rhinochelys is being investigated. [less ▲]

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See detailHic Sunt NATs: Uncovering Address Translation with a Smart Traceroute
Zullo, Raffaele; Pescapé, Antonio; Edeline, Korian ULg et al

in IEEE/IFIP Workshop on Mobile Network Measurement (MNM) (2017, June)

Middleboxes are pervasive in today's Internet as they are deployed for an increasing number of reasons. An example is the network address translation (NAT), one of the first task to be performed to cope ... [more ▼]

Middleboxes are pervasive in today's Internet as they are deployed for an increasing number of reasons. An example is the network address translation (NAT), one of the first task to be performed to cope with the lack of IPv4 addresses. Recently the landscape for NATs has become even more crowded, especially in mobile networks, mainly due to the impossibility of IPv6 to be a large-scale solution to addressing issues. In this paper, we present a novel methodology for detecting NATs embodied in Mobile Tracebox, a measurement tool for Android smart devices that detects a wide range of middleboxes. It analyzes ICMP time-exceeded messages received during \traceroute and points at IP and transport checksum inconsistencies in the embedded packets to uncover address translation along a path. We deployed Mobile Tracebox through a crowdsourcing approach and used the collected dataset to validate our methodology. Results showed that, in absence of middleboxes breaking \traceroute, it can help to detect and locate NATs in the majority of the cases. [less ▲]

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See detailTowards a Renewed Alias Resolution with Space Search Reduction and IP Fingerprinting
Grailet, Jean-François ULg; Donnet, Benoît ULg

in Network Traffic Measurement and Analysis Conference (TMA) (2017, June)

Since the early 2000's, the Internet Topology has been frequently described and modeled from the perspective of routers. To this end, alias resolution mechanisms have been developed in order to aggregate ... [more ▼]

Since the early 2000's, the Internet Topology has been frequently described and modeled from the perspective of routers. To this end, alias resolution mechanisms have been developed in order to aggregate all IP interfaces of a router, collected with traceroute, into a single identifier. So far, many active measurement techniques have been considered, often taking advantage of specific features from network protocols. However, a lot of these methods have seen their efficiency decrease over time due to security reinforcements across the Internet. In this paper, we introduce a generic methodology to conduct efficient and scalable alias resolution. It combines the space search reduction of TreeNET (a tool for efficiently discovering subnets) with a fingerprinting process used to assess the feasibility of several state-of-the-art alias resolution methods, using a small, fixed amount of probes. We validate our method along MIDAR on an academic groundtruth and demonstrate that our methodology can achieve similar accuracy while using less probes and discovering subnets in the process. We further evaluate our method with measurements made on PlanetLab towards several distinct ASes of varying sizes and roles in the Internet. The collected data shows that some properties of our fingerprints correlate with each other, hinting some observed profiles could be linked with equipment vendors. Both TreeNET (which implements our methodology) and our dataset are freely available. [less ▲]

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

Conference (2017, June)

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

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

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See detailMapping Soil Organic Carbon stocks and estimating uncertainties at the regional scale following a legacy sampling strategy (Southern Belgium, Wallonia)
Chartin, Caroline; Stevens, Antoine; Goidts, Esther et al

in Geoderma Regional (2017), 9

The quantification and the spatialisation of reliable SOC stocks (Mg C ha− 1) and total stock (Tg C) baselines and associated uncertainties are fundamental to detect the gains or losses in SOC, and to ... [more ▼]

The quantification and the spatialisation of reliable SOC stocks (Mg C ha− 1) and total stock (Tg C) baselines and associated uncertainties are fundamental to detect the gains or losses in SOC, and to locate sensitive areas with low SOC levels. Here, we aim to both quantify and spatialize SOC stocks at regional scale (southern Belgium) based on data from one non-design-based or model-based sampling scheme. To this end, we developed a computation procedure based on Digital Soil Mapping techniques and stochastic simulations (Monte-Carlo) allowing the estimation of multiple (here, 10,000) independent spatialized datasets. The computation of the prediction uncertainty accounts for the errors associated to both the estimations of i) SOC stocks and ii) parameters of the spatial model. Based on these 10,000 individuals, median SOC stocks and 90% prediction intervals were computed for each pixel, as well as total SOC stocks and their 90% prediction intervals for selected sub-areas and for the entire study area. Hence, a Generalised Additive Model (GAM) explaining 69.3% of the SOC stock variance was calibrated and then validated (R2 = 0.64). The model overestimated low SOC stock (below 50 Mg C ha− 1) and underestimated high SOC stock (especially those above 100 Mg C kg− 1). A positive gradient of SOC stock occurred from the northwest to the center of Wallonia with a slight decrease on the southernmost part, correlating to the evolution of precipitation and temperature (along with elevation) and dominant land use. At the catchment scale higher SOC stocks were predicted on valley bottoms, especially for poorly drained soils under grassland. Mean predicted SOC stocks for cropland and grassland in Wallonia were of 26.58 Tg C (SD 1.52) and 43.30 Tg C (2.93), respectively. The procedure developed here allowed to predict realistic spatial patterns of SOC stocks all over agricultural lands of southern Belgium and to produce reliable statistics of total SOC stocks for each of the 20 combinations of land use/agricultural regions of Wallonia. This procedure appears useful to produce soil maps as policy tools in conducting sustainable management at regional and national scales, and to compute statistics which comply with specific requirements of reporting activities. [less ▲]

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See detailDecoding the disciplines – A pilot study at the University of Liège (Belgium)
Verpoorten, Dominique ULg; Devyver, Julie ULg; Duchâteau, Dominique ULg et al

in Andersson, Roy (Ed.) Proceedings of the 2nd EuroSoTL Conference (2017, June)

This paper reports on a first attempt to apply the two first stages of the “Decoding the disciplines” framework (Pace, 2017) at the University of Liège (Belgium). In this context, 7 professors volunteered ... [more ▼]

This paper reports on a first attempt to apply the two first stages of the “Decoding the disciplines” framework (Pace, 2017) at the University of Liège (Belgium). In this context, 7 professors volunteered to reflect, through a structured process, upon “bottlenecks” in their courses, with the help of IFRES’ (Institute for Training and Research in Higher Education) pedagogical advisers. This pilot delivered contrasted observations: while participants granted value to their exposure to this approach, especially in terms of enhanced awareness of possible discrepancies between what experts and newcomers in the field might consider as obvious, none of them activated the possibility offered to tackle the identified bottlenecks, according to the systematic approach (stages 3-7) suggested by the framework. The paper presents the pedagogical setting, analyses the interviews of participants and the outcomes of the project, outlines explanations for its results, and shares some lessons learnt. [less ▲]

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See detailSartre, hériter de Heidegger ? Quelques remarques à propos du circuit de l'ipséité dans "L'Être et le Néant" [titre provisoire]
Recchia, Fabio ULg

in Revista Ética e Filosofia Política (2017), 1

Il n’est en philosophie d’héritage que gagné. Et en m’installant dans cette ambigüité propre au savoir philosophique, j’examine, dans ce texte, un développement peu étudié de la pensée sartrienne : sa ... [more ▼]

Il n’est en philosophie d’héritage que gagné. Et en m’installant dans cette ambigüité propre au savoir philosophique, j’examine, dans ce texte, un développement peu étudié de la pensée sartrienne : sa théorie du « circuit de l’ipséité » de la conscience. Quant à mon objectif, il s’agira de faire le point sur le processus de maturation intellectuelle à l’issue duquel Sartre conçut l’ipséité comme un circuit. Ainsi je mets en évidence que certaines des réflexions de Heidegger, Bergson et Mauss, sur la notion d’identité personnelle ont constitué les héritages philosophiques mobilisés et transformés par la théorie sartrienne de l’ipséité. [less ▲]

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See detailUntargeted serum metabolite profiling of colorectal cancer using GC-Orbitrap technology
Di Giovanni, Nicolas ULg; Cojocariu, C; Silcock, P et al

Poster (2017, June)

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See detailDocumenting the parameters of effective SoTL counselling
Jérôme, Françoise ULg; Verpoorten, Dominique ULg; Detroz, Pascal ULg

in Andersson, Roy (Ed.) Proceedings of the 2nd EuroSoTL Conference (2017, June)

The Specialized Master in Higher Education Pedagogy (Formasup) organized at the University of Liège (Belgium) aims at the professional development of teachers involved in Higher Education. The training ... [more ▼]

The Specialized Master in Higher Education Pedagogy (Formasup) organized at the University of Liège (Belgium) aims at the professional development of teachers involved in Higher Education. The training programme gives participants the opportunity to make a full-scale SoTL study (from the implementation of a well-circumscribed course regulation to the assessment of its pedagogical effectiveness by means of the analysis of collected data) of one prominent aspect of their teaching practice. The process of trying out some new pedagogical approach and of discussing its effects on student learning has also to be reported in the form of a scientific paper (including a short review of the relevant pedagogical literature) and presented to a small audience of teacher colleagues. In order to meet the many requirements of such a complex task, each participant benefits from individualized pedagogical counselling. Besides a brief description of the Formasup context, the present contribution proposes brief case studies of three SoTL projects carried out in 2016. The case studies focus mainly on the dynamics of the interaction between teacher and pedagogical counsellor at each constitutive step of the SoTL project with the intention of making out the specificities of counselling applied to first time SoTL experience (time dedicated to and types of counselling activities in relation to the particularities of individual projects). The case studies are then integrated into a bigger picture drawing upon a larger number of counselling experiences over the last four years (from 2013 to 2016). On the basis of the main characteristics of 21 counselling experiences we propose a typology of teacher profiles according to their strategic approach to SoTL and the corresponding input of counselling. [less ▲]

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See detailLes limites de l’administration de la PCL - R à une population de sujets schizophrènes dans le contexte médico-légal
Englebert, Jérôme ULg; Matteucci, Marie; De Page, Louis et al

Poster (2017, May 31)

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See detailMulti-instrument study of the hourly pulsations in Saturn's magnetophere
Palmaerts, Benjamin ULg

Doctoral thesis (2017)

The exploration of the magnetospheres of Jupiter and Saturn has revealed various periodic processes. Some periodicities are related to the planetary rotation while some others are characterized by a short ... [more ▼]

The exploration of the magnetospheres of Jupiter and Saturn has revealed various periodic processes. Some periodicities are related to the planetary rotation while some others are characterized by a short period. In Saturn's magnetosphere, periodicities of about one hour have been reported in the measurements of charged particle fluxes, plasma wave emissions, magnetic field strength and auroral emission brightness. The frequency, the spatial distribution and the magnetospheric process generating these hourly periodicities are still unknown. Similar short-period pulsations have been also observed in Jupiter's magnetosphere, suggesting that these 1-hour periodicities are the signature of a fundamental process in the magnetospheres of these two giant planets. In this thesis, I performed a thorough analysis of these hourly periodicities at Saturn using the data sets of several instruments on board the Cassini spacecraft in orbit around the giant planet since 2004. First I made a survey of the quasi-periodic 1-hour energetic electron pulsations observed in Saturn's magnetosphere between 2004 and 2014 by the Cassini particle instrumentation. These pulsations appear in the electron fluxes at energies between a hundred keV up to several MeV. The survey includes 720 pulsed electron events observed in the outer magnetosphere over a wide range of latitudes and local times, revealing that this phenomenon is common and frequent in Saturn's magnetosphere. A statistical analysis on the morphological properties of the pulsed events suggests a high-latitude source for the pulsed energetic electrons. I also investigated the simultaneous signatures of the electron pulsations in the radio emissions and the magnetic field measured by Cassini. The results of the multi-instrument study support the scenario of a high-latitude electron source and suggest a possible relation with the auroral processes. Images of Saturn's auroral emissions, which display the ionospheric response to magnetospheric dynamics, have been investigated to highlight any hourly pulsations. A high-latitude auroral spot exhibits quasi-periodic brightening with a periodicity of around 60 minutes. This auroral spot is associated with the magnetospheric cusp and high-latitude magnetopause reconnection in the lobes. Pulsed dayside magnetopause reconnection is likely a common triggering process for the cusp auroral brightening and for the high-latitude energetic electron pulsations. Finally, analysis of the plasma environment with low-energy electron measurements provided evidence of the presence of energetic electron pulsed events in the close vicinity of the magnetopause. Therefore it is suggested that processes at the magnetopause, most likely magnetic reconnection induced by instabilities, generate the hourly electron pulsations located at low latitude. The multi-instrument study achieved in my thesis sets constraints on the origin of the pulsed electron events and bring forward our current understanding on the hourly pulsations in Saturn's magnetosphere. [less ▲]

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See detailRégulation de voies de signalisation par deux acteurs de la voie Nonsense-mediated Decay, Dhx34 et Nbas: la cas particulier de l'adénohypophyse.
Windhausen, Thomas ULg

Doctoral thesis (2017)

In eukaryotes, biosynthesis of functional mRNAs is the core process of genetic expression and is monitored by highly conserved pathways that prevent appearance of aberrant mRNAs. Amongst them the Nonsense ... [more ▼]

In eukaryotes, biosynthesis of functional mRNAs is the core process of genetic expression and is monitored by highly conserved pathways that prevent appearance of aberrant mRNAs. Amongst them the Nonsense-Mediated Decay (NMD) pathway is the surveillance mechanism that detects and degrades mRNAs containing premature termination codons (PTCs). The translation of transcripts containing such nonsense codon within the coding sequence would leads to the production of C-terminally truncated proteins that could exhibit dominant negative or gain-of-function activities. The NMD is thus a key determinant of the phenotypic outcome of numerous diseases involving PTCs such as the β-thalassemia, the Duchenne muscular dystrophy or even some cancers. In addition to its quality control function degrading aberrant mRNA, the NMD is also involved in the abundance regulation of several physiological transcripts. For example the NMD is involved in the regulation of the concentration of splicing factors in a process called AS-NMD (Alternative splicing- Nonsense-mediated Decay), establish a threshold for some stress responses such as the UPR pathway (Unfolded Protein Response) and constitute a defence mechanism against ARN(+) viruses. Despite tremendous studies, the study of the developmental and physiological impact of the NMD pathway is restrained due to the early lethality of the mammals embryos that underwent knock-out of one of the NMD actor. As an alternative model we propose Danio rerio which as a vertebrate with external development and a large panel of genetic inactivation methods is a wonderful model for developmental studies and represent a excellent tool to study the NMD pathway. Initial studies in zebrafish conducted by morpholino knock-down, showed that depletion of upf1, upf2, smg5, smg6, dhx34 or nbas leads to the NMD blockage and induce similar developmental defects mainly in brain, eyes and somites. Moreover, it’s has been showed that as in mammals the NMD in fish also implicated in the regulation of natural transcripts. We present here a functional study of two key actors of the NMD, Dhx34 and Nbas, in the interesting case of the pituitary gland development. In the present study, we shed light on the NMD pathway importance for the developmental process of the pituitary gland. Using in situ hybridization confirmed by RT-qPCR quantification, we observed that the NMD inactivation thought inhibition of two crucial actors of this surveillance pathway, Dhx34 and Nbas, lead to a hypertrophy of the gland coupled with a promotion of the anterior cell fates and a repression of the posterior fates at 2 dpf. We proved that this endocrine deregulation is due to a late general increase of the Sonic Hedgehog and Delta-Notch signalling during AH formation. In addition to previous works, our results show that the NMD pathway is required to control the activity diverse signalling pathways involved in the developmental process. As confirmation, we could observe serious abnormalities in a variety of tissues such as underdeveloped eyes, intestine, liver and skeleton, defects in brain, somites and vascular patterning. [less ▲]

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See detailPhysiopathologie des tendinopathies
Kaux, Jean-François ULg

Conference (2017, May 28)

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

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

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