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See detailLe Tarier pâtre pour comparer des habitats. Quelle qualité pour les plantations de sapins de Noël.
Gailly, Robin ULg

Conference given outside the academic context (2017)

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

Conference (2017, June 12)

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

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

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See detailActualités fiscales européennes: impacts sur les impôts directs en Belgique
Richelle, Isabelle ULg

Scientific conference (2017, June 12)

Actualités en matière de fiscalité européenne - 2016/2017 - Conférence donnée avec Prof. E. Traversa et M. Giffoni

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See detailLuteinizing Hormone Deficiency: Historical Views and Perspectives
VALDES SOCIN, Hernan Gonzalo ULg; Daly, Adrian ULg; BECKERS, Albert ULg

in Austin Andrology (2017), 2(1), 1-2

Fertility in men requires normal testicular development, which is controlled by chorionic gonadotropin (hCG) in utero and thereafter by luteinizing hormone (LH) and follicle-stimulating hormone (FSH ... [more ▼]

Fertility in men requires normal testicular development, which is controlled by chorionic gonadotropin (hCG) in utero and thereafter by luteinizing hormone (LH) and follicle-stimulating hormone (FSH). Some rare observations, such as, mutations in the luteinizing hormone subunit beta gene [2] have contributed substantially to our understanding of reproductive development and male infertility. In this editorial we summaryze current knowledge about beta LH mutations and polymorphism in men and discuss fertility issues. [less ▲]

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

Conference (2017, June 12)

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

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

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

Conference (2017, June 12)

Detailed reference viewed: 53 (6 ULg)
See detailEtat de la question : mnémotechnique et aristotélisme
De Marco, Rosa ULg

Speech/Talk (2017)

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See detailImpact of formulation and process parameters on near-infrared spectra: Application for water determination in biopharmaceuticals
Clavaud, Matthieu ULg; Roggo, Yves; Allmendinger, Andrea et al

Poster (2017, June 11)

Traditionally, the water content of freeze-dried biopharmaceuticals is determined by time-consuming methods such as Karl Fischer titration. As a fast and non-destructive method, many studies demonstrated ... [more ▼]

Traditionally, the water content of freeze-dried biopharmaceuticals is determined by time-consuming methods such as Karl Fischer titration. As a fast and non-destructive method, many studies demonstrated the efficiency of Near-Infrared (NIR) spectroscopy for that purpose [1]. In this study, NIR was applied to different freeze-dried monoclonal antibody. The aim was to evaluate the robustness of a NIR model depending on formulation composition and process parameters of the lyophilization parameters, and the benefits of NIR when developing a freeze-drying cycle for a new pharmaceutical product. A full Design of experiments (DoE) was established in order to produce materials with various formulations and various process parameters. As a first step, a calibration model was created and validated. The model creation was based on 4 target lyophilized cycles which were manufactured to obtain samples with different water content concentration. Then, 20 lyophilized cycles were produced according to the DoE. Two levels of protein and sucrose concentration, and two levels of pressure / primary drying temperature and process time were investigated. Furthermore, several samples of each experiment stored at different temperature and relative humidity conditions were evaluated. Chemometrics using Principal Component Analysis (PCA) and Partial Least Squares (PLS) were used to evaluate the process variations and to determine the water content, respectively. NIR is capable to differentiate between different lyophilization process conditions, based on chemometrics. Robust calibration NIR model for water determination was generated against KF independent on lyophilization process parameters and formulation composition. NIR is suitable and robust method for drug product development of freeze-dried formulation. [less ▲]

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

Conference (2017, June 10)

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

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

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

Conference (2017, June 10)

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

Conference (2017, June 09)

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See detailHeavy or not ? Analysing drum placements in hard rock music
Pirenne, Christophe ULg

Conference (2017, June 09)

The aim of this study is to verify—thanks to computer musical analysis—if downbeats and backbeats placements are different when a drummer plays in a hard rock or in a funk style. In other words, does beat ... [more ▼]

The aim of this study is to verify—thanks to computer musical analysis—if downbeats and backbeats placements are different when a drummer plays in a hard rock or in a funk style. In other words, does beat placements contribute to the heaviness of hard rock? In the field of popular music, many authors admit that there are three ways of placing the bass drum and snare drum beats with respect to metronomic time: either an anticipation, a perfect coincidence, or a slight delay. While the repertoires where the notes coincide with the metronomic time are often described as mechanical and a little cold, the anticipated notes would have a more propitious character to the dance and the delayed notes, would produce a music with a heavy character. These impressions were very often mentioned by those working on heavy metal (Waltzer, Brennan), but they have not been scientifically proven to the extent that these variations are counted in milliseconds. Two new IRCAM software, Audiosculpt and OpenMusic, now make it possible to measure very precisely these smallest variations. Thanks to this software, I will analyze the snare and bass drum hits in a few funk and hard rock songs released in 1970: James Brown's Get Up (I Feel Like Being A) Sex Machine and Super Bad (with "Jabo" Starks on drums) (which were already analyzed in Danielsen’s Presence and Pleasure, 2006). These songs will be compared with Black Night by Deep Purple (Ian Paice on drums), Uriah Heep's Gypsy (Alex Napier on drums) and Led Zepplin's Immigrant Song (John Bonham on drums). With this small sample, I will of course not be able to draw conclusions for hard rock as a whole, but if differences appear, it will be necessary to work on metadata to know if delaying the beats is a representative practice or simply a clean playing style for some drummers. [less ▲]

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See detailThe roles of competition law in a regulated digital market environment: lessons (not) to learn from related fields of EU regulation
Van Cleynenbreugel, Pieter ULg

Scientific conference (2017, June 09)

Within the framework of its Digital Single Market (DSM) agenda, the European Union proposes the adoption of new legislative proposals aimed at removing remaining obstacles to digital transactions ... [more ▼]

Within the framework of its Digital Single Market (DSM) agenda, the European Union proposes the adoption of new legislative proposals aimed at removing remaining obstacles to digital transactions. Proposals relate to the abolition of geo-blocking as well as data and copyright portability. Complementing competition law provisions, those initiatives would seek to create the conditions for a competitive e-commerce environment within the EU internal market. In doing so, the Commission implicitly but clearly seeks to replicate a regulatory and policy approach it had taken already from the 1990s onwards when liberalising the energy and electronic communication sectors. It can be submitted that the European Commission, in proposing its DSM regulation strategy and in setting the terms of its e-commerce sector inquiry, has paid insufficient attention so far to the various and complementary roles competition law can play in a more strictly regulated market environment. In an attempt to clarify the scope and role of EU competition law and its enforcement in a digital single market environment and to guarantee its coherent application with the proposed DSM regulations, this paper will reflect on the roles competition law can our should still play in this context. Proceeding in three parts, the first part of the paper will chart the interaction between competition law and market regulation proposals in the EU’s DSM context. Using examples from the geo-blocking, data portability and copyright proposals made, this part highlights how the EU institutions perceive the interaction between competition law provisions and market regulation in this context. On the basis of that analysis, the second part will frame the interaction between competition law and market regulation as perceived in the DSM strategy, by comparing it with earlier examples in the realm of energy and electronic communications. In doing so, this part will identify two important similarities (breaking up barriers to trade and facilitating cross-border competition) as well as two fundamental differences (absence of natural monopolies and of intensely state regulated sectors). Acknowledging those similarities and differences, it will be submitted, allows better to conceptualise the role of competition law in the particular DSM context. To that extent, the third part will present and analyse the tenability of three possible roles competition law can still play against this background. Assessing the advantages and limits of each approach, that part will invite the Commission to take a clearer stance regarding the choice of one of them. [less ▲]

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See detailBio- and CO2-sourced polyhydroxyurethanes for hydrogels coatings, foams and high performance adhesives
Gennen, Sandro ULg; Panchireddy, Satyannarayana ULg; Grignard, Bruno ULg et al

Poster (2017, June 09)

Due to concerns about global warming combined with the decrease of fossil resources, the chemical transformation of carbon dioxide (CO2) into added-value products has gained interest in both academic and ... [more ▼]

Due to concerns about global warming combined with the decrease of fossil resources, the chemical transformation of carbon dioxide (CO2) into added-value products has gained interest in both academic and industrial fields. Indeed, CO2 can be viewed as a cheap, non-toxic and renewable C1 building block precursor of sophisticated organic molecules and polymers. One representative example of CO2 transformation includes the synthesis of various (bis)cyclic carbonates via CO2/epoxide coupling.1-3 Bis-cyclic carbonates were then valorized as monomers for the synthesis of series of novel low carbon footprint poly(hydroxyurethane)s (PHUs). These polymers are now exploited to produce sustainable materials including foams for thermal insulation,4 hydrogels (for potential biomedical use)5 and high performance adhesives and glues (for metal, glass and wood). [less ▲]

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See detailDevelopment of an HPTLC method for determination of hypoglycin A in aqueous extracts of seedlings and samaras of Acer species.
Habyarimana, Jean Belt Adélite ULg; Baise, Etienne; Douny, Caroline ULg et al

E-print/Working paper (2017)

Hypoglycin A (HGA) is a toxin contained in seeds of the sycamore maple tree (Acer pseudoplatanus). Ingestion of this amino acid causes equine atypical myopathy (AM) in Europe. Another variety, A. negundo ... [more ▼]

Hypoglycin A (HGA) is a toxin contained in seeds of the sycamore maple tree (Acer pseudoplatanus). Ingestion of this amino acid causes equine atypical myopathy (AM) in Europe. Another variety, A. negundo, is claimed to be present where AM cases were reported in the US. For unknown reasons, occurrence of this disease has increased. It is important to define environmental key factors that may influence toxicity of samaras from Acer species. In addition, the content of HGA in seedlings needs to be determined since AM outbreaks, during autumn period when the seeds fall but also during spring when seeds are germinating. The present study aims to validate a reliable method using high performance thin layer chromatography for determination and comparison of HGA in samaras and seedlings. The working range of the method was between 20 μg HGA to 408 μg HGA per ml water, corresponding to 12 - 244 mg/kg fresh weight or 40 - 816 mg/kg dry weight, taking into account of an arbitrary average dry matter content of 30%. Instrumental limit of detection and limit of quantification were of 10 µg HGA/ml and 20 µg HGA/ml water, respectively. Instrumental precision was 4% (RSD on 20 repeated measurements) while instrumental accuracy ranged between 86% and 121% of expected value. The HGA recovery of the analytical method estimated from spiked samaras and seedlings samples ranged between 63 and 103%. The method was applied to 9 samples of samaras from Acer pseudoplatanus, A. platanoides and A. campestre and 5 seedlings samples from A. pseudoplatanus. The results confirm detection of HGA in samaras from A. pseudoplatanus and the absence of detection in samaras of other tested species. They also suggest that detected levels of HGA are highly variable. This confirmed the suitability of the method for HGA detection in samaras or seedling. [less ▲]

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See detailMethodological approach for the implementation of a simulator in augmented reality in a radiation therapy department
Servotte, Jean-Christophe ULg; Guillaume, Michèle ULg; BOGA, Deniz ULg et al

in International Journal of Healthcare Management (2017), 10(3), 154-159

Radiation therapy (RT) is one of the cornerstones for the treatment of cancer. In most countries RT machines are handled by professionals benefitting from an ad hoc training in theoretical knowledge as ... [more ▼]

Radiation therapy (RT) is one of the cornerstones for the treatment of cancer. In most countries RT machines are handled by professionals benefitting from an ad hoc training in theoretical knowledge as well as technical and non-technical skills. In Belgium, RT departments are hiring in nurses for this activity. In countries where there is a specified core curriculum for basic training of radiation technologist, this basic training falls short once in practice and there is an obvious requirement for a continuous updating of skills in order to keep up with the accelerating evolution of technology. Therefore, the decision has been taken to implement a simulator in augmented reality in the RT department in Liège, to face the double challenge i.e. basic professional training as well as continuous education in technical and nontechnical skills and Crew Resource Management. We describe a methodological approach to implement this simulator in augmented reality. [less ▲]

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See detailLe principe non bis in idem et les procédures mixtes : un camouflet infligé à la jurisprudence Zalotoukhine ?
Michiels, Olivier ULg; Falque, Géraldine ULg

in Revue de Jurisprudence de Liège, Mons et Bruxelles (2017), (2017/23), 1069-1078

Pour lutter contre certains comportements socialement inacceptables, les États peuvent concevoir des réponses juridiques complémentaires au moyen de procédures mixtes pour autant que celles-ci forment un ... [more ▼]

Pour lutter contre certains comportements socialement inacceptables, les États peuvent concevoir des réponses juridiques complémentaires au moyen de procédures mixtes pour autant que celles-ci forment un tout cohérent, c’est-à-dire qu’elles soient liées par un lien matériel et temporel suffisamment étroit. Le cumul des sanctions pénales et administratives est autorisé dès lors que les deux procédures poursuivent des buts complémentaires et traitent d’aspects différents de l’acte préjudiciable, que le cumul des sanctions soit prévisible, qu’il n’y ait pas de répétition dans la collecte et dans l’appréciation des preuves et qu’un mécanisme de compensation entre les sanctions soit prévu. [less ▲]

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See detailCoherent backscattering of bosonic matter-wave in the presence of disorder and interaction
Chrétien, Renaud ULg; Dujardin, Julien; Petitjean, Cyril ULg et al

Poster (2017, June 09)

Coherent backscattering, which is an enhancement of the backscattered intensity of a light going through a medium made of point-like scatterers, is known as one of the most robust interference effects. It ... [more ▼]

Coherent backscattering, which is an enhancement of the backscattered intensity of a light going through a medium made of point-like scatterers, is known as one of the most robust interference effects. It has been shown, although it is nowadays not fully understood yet, that in the presence of non-linearities, this enhancement turns to an inhibition. We propose to study that effect by means of a system in which we study the transport of a Bose-Einstein condensate through Aharonov-Bohm rings in the presence of interaction and disorder. We find that our system is indeed a good candidate to observe the coherent peak’s inversion and is also suitable for more feasible theoretical calculations than in the original case. [less ▲]

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