References of "2012"
     in
Bookmark and Share    
Full Text
See detailLa dynamique du karst dans le synclinal de Sprimont de 1898 à 2012
Peeters, Alexandre ULg; Ek, Camille ULg; Labarbe, Philippe et al

Conference given outside the academic context (2012)

Detailed reference viewed: 34 (9 ULg)
Full Text
See detailPlaidoyer universitaire pour le rail
Arnsperger, Christian; Cassiers, Isabelle; Crutzen, Nathalie ULg et al

Article for general public (2012)

[Chapeau] Le réseau ferré en Wallonie s’apparentera bientôt à un train touristique reliant deux gares Calatrava plutôt que d’assurer à chacun le droit à sa mobilité.

Detailed reference viewed: 53 (12 ULg)
Full Text
See detailS’engager dans un atelier-théâtre : vers une recomposition du sens de l’expérience
Brahy, Rachel ULg

Doctoral thesis (2012)

Dans cette thèse, nous traitons des animations théâtrales mises en place par les compagnies de théâtre-action situées en Communauté française de Belgique. La question centrale qui nous guide est celle des ... [more ▼]

Dans cette thèse, nous traitons des animations théâtrales mises en place par les compagnies de théâtre-action situées en Communauté française de Belgique. La question centrale qui nous guide est celle des formes concrètes que revêtent les pratiques contemporaines d’animation. Par ailleurs, nous nous intéressons également aux changements survenus dans l’exercice de l’activité. En effet, les premières compagnies à se revendiquer du « théâtre-action » naissent autour des mouvements de 1968. D’abord perçues comme expérimentales, ces pratiques pourraient bien, aujourd’hui, être considérées comme désuètes, à tout le moins, déconnectées des problématiques contemporaines. Notre enquête s’ouvre à partir de cette idée et nous montrons ensuite comment s’est acheminée une progressive reconversion des pratiques. En privilégiant le cadre théorique de la sociologie pragmatique française (et plus exactement, celui des « régimes d’engagement » établi par Laurent Thévenot) nous détaillons les modalités d’engagement dans un « atelier-théâtre ». Alors qu’originellement, le dispositif théâtral privilégiait les formats de la revendication « critique » et mobilisait prioritairement des personnes issues du monde ouvrier, on constate aujourd’hui une relation forte entre les compagnies de théâtre-action et le monde de l’accompagnement social. Cette proximité produit inévitablement un déplacement signifiant qui, pourtant, ne s’apparente pas à une totale superposition des secteurs. L’analyse de notre matériel empirique (composé d’entretiens et d’observation ethnographiques) témoigne d’une irréductible spécificité inhérente à l’engagement dans le monde du théâtre et de la fiction. Ainsi, les manières de prendre part à un monde commun et de s’engager en public sont repensées. En définitive, nous dégageons l’existence d’un « espace public esthétique » et précisons les voies par lesquelles un « engagement en présence » permettrait d’y accéder. [less ▲]

Detailed reference viewed: 250 (47 ULg)
Full Text
See detailDynamique du Karst dans le synclinal de Sprimont de 1898 à 2012
Peeters, Alexandre ULg; Ek, Camille ULg; Labarbe, Philippe et al

Conference (2012, December 08)

1. Une prospection dans le synclinal de Sprimont en 1898 C’est dans un synclinal calcaire de 12 km de long et 1,2 km de large que se situe Sprimont. Le synclinal, qui s’allonge d’est en ouest, est coupé ... [more ▼]

1. Une prospection dans le synclinal de Sprimont en 1898 C’est dans un synclinal calcaire de 12 km de long et 1,2 km de large que se situe Sprimont. Le synclinal, qui s’allonge d’est en ouest, est coupé en deux par la vallée de l’Ourthe. Le présent travail concerne la partie orientale de ce pli. Vers 1898, E. Van den Broeck, E. Martel et E. Rahir parcouraient ce synclinal et cartographiaient ses phénomènes karstiques (Van den Broeck, Martel & Rahir, 1910, vol. ll). 2. Révisions de la cartographie de 1971 à 2000 Raymond Michel entreprit en 1970-71 une révision de la cartographie et constata que beaucoup de pertes s’étaient déplacées, presque toutes vers l’amont, et sur une distance moyenne de 270 m ! Des levés ultérieurs par divers géographes confirmèrent l’extrème mobilité des pertes du vallon et furent consignées dans des cartographies de la CWEPSS et de la DGATLP. À ces mises à jour participèrent notamment D. Closson, A. Jaspar, V. Mousny, M. Salmon, J.-C. Schyns et A. Peeters. 3. Un nouveau levé en 2012 Une nouvelle révision fut entreprise en 2012 par deux équipes qui passèrent chacune trois journées pleines sur le terrain. La prospection s’appuya sur des photos aériennes et les phénomènes furent « géolocalisés » à l’aide d’un petit GPS de terrain (précision env. 10 m). Les pertes karstiques se déplacent au fil du temps, et avec parfois une spectaculaire rapidité. Par exemple, la perte du champ de maïs, au bord de la route N 678 (de Sprimont à Chanxhe) a été localisée en 1995 à 300 m en amont de sa localisation en 1971 ; en 1971, elle était déjà à 350 m en amont de sa situation en 1898. Et en 1999, un autre déplacement de la même perte avait provoqué un effondrement de la route N 678. 4. Conclusions Les phénomènes karstiques du synclinal de Sprimont présentent une dynamique fort active et, dans certains cas, dangereuse pour les travaux des hommes. Les déplacements des points d'enfouissement peuvent poser des problèmes de stabilité des bâtiments et des routes, canalisations, etc., mais aussi des problèmes de pollution. C'est pourquoi il est important de suivre attentivement l'évolution de l'hydrologie karstique. Ceci explique les décisions du Service public de Wallonie de mettre périodiquement à jour la cartographie des phénomènes, et de réglementer les implantations de constructions dans les zones karstiques. [less ▲]

Detailed reference viewed: 25 (6 ULg)
Full Text
See detailArthrose et hernie discale lombaire : bilan neurophysiologique
WANG, François-Charles ULg

Conference (2012, December 08)

Detailed reference viewed: 95 (9 ULg)
Full Text
See detailArsinoé II, déesse gréco-égyptienne à travers quelques petites stèles prolémaiques
Caneva, Stefano ULg

Scientific conference (2012, December 07)

Detailed reference viewed: 31 (0 ULg)
Full Text
Peer Reviewed
See detailDiscriminant BOLD Activation Patterns during Mental Imagery in Parkinson’s Disease
Schrouff, Jessica ULg; Cremers, Julien ULg; D'Ostilio, Kevin ULg et al

in Proceedings of MLINI 2012 (2012, December 07)

Using machine learning based models in clinical applications has become current practice and can prove useful to provide information at the subject’s level, such as predicting an (early) diagnosis or ... [more ▼]

Using machine learning based models in clinical applications has become current practice and can prove useful to provide information at the subject’s level, such as predicting an (early) diagnosis or monitoring the evolution of a disease. However, the performance of these models depends on the choice of a biomarker to detect the presence or absence of a disease. Choosing a biomarker is not straightforward, especially in the case of Parkinson’s disease when compared to healthy subjects. In the present work, we investigated the mental imagery of gait as a biomarker of Parkinson’s disease and showed that the signal in the mesencephalic locomotor region during the mental imagery of gait at a comfortable pace can discriminate significantly between idiopathic Parkinson’s disease patients and healthy subjects. Although there is room for improvement, the results of this preliminary study are promising. [less ▲]

Detailed reference viewed: 204 (34 ULg)
Full Text
Peer Reviewed
See detailCalitatea lucernei sub influenţa fertilizării în condiţiile din silvostepa Moldovei
Stavarache, Mihai; Vîntu, Vasile; Samuil, Costel et al

in Ţenu, Ioan; Vîntu, Vasile; Jităreanu, Gerard (Eds.) Durable Agriculture and Food Security – Priority objectives in research activity of the Ph.D. students from the UASVM Iasi (2012, December 07)

The research conducted during 2011-2012, on the Ezăreni farm, has sought influence of fertilization on the leaves/stems ratio, crude protein content (CP), neutral detergent fiber content (NDF), acid ... [more ▼]

The research conducted during 2011-2012, on the Ezăreni farm, has sought influence of fertilization on the leaves/stems ratio, crude protein content (CP), neutral detergent fiber content (NDF), acid detergent fiber content (ADF) and relative feed value (RFV), of alfalfa (Medicago sativa L.) in the second and third year of vegetation, at the first cut. The studied experimental plots were v1- unfertilized (control plot), v2-N50P50, v3-N75P50 and v4-30 t/ha manure). The results showed that the fertilization negatively affected crude protein content of plants. Although the protein content of leaves was higher and that of strains was less affected, the leaves/stems ratio decided this indicator for plant production. Organic fertilization showed a highly significant positive effect on the content of plant leaves and stems in NDF and ADF. [less ▲]

Detailed reference viewed: 60 (1 ULg)
Full Text
See detailDynamics of Elasto-Inertial Turbulence in Flows with Polymer Additives
Terrapon, Vincent ULg; Dubief, Yves; Soria, Julio

Scientific conference (2012, December 07)

Elasto-inertial turbulence is a new state of turbulence that may occur in certain viscoelastic flows, in particular flows with polymer additives. The dynamics of elasto-inertial turbulence is here ... [more ▼]

Elasto-inertial turbulence is a new state of turbulence that may occur in certain viscoelastic flows, in particular flows with polymer additives. The dynamics of elasto-inertial turbulence is here investigated numerically from the perspective of the coupling between polymer dynamics and flow structures. The resulting mechanism helps resolve a long standing controversy in the understanding of polymer drag reduction and explains the phenomenon of early turbulence, or onset of turbulence at lower Reynolds numbers than for Newtonian flows, previously observed in polymeric flows. In particular, we show that the introduction of small perturbations into the polymeric flow excites the unstable nature of the nonlinear advection term, resulting in the formation of sheets or cliffs of polymer stretch. These sheets of high polymer stretch, hosting a significant increase in extensional viscosity, create a strong local anisotropy, with a formation of local low-speed jet-like flow. The response of the flow is through pressure, whose role is to redistribute energy across components of momentum, resulting in the formation of waves, or trains of alternating rotational and straining motions. The mechanism shares some similarity with the Kelvin-Helmholtz instability, except that the thickness of these sheets is too close to the Kolmogorov scale for vortices to be created. Once triggered, EIT is self-sustained since the elastic instability creates the very velocity fluctuations it feeds upon. [less ▲]

Detailed reference viewed: 53 (17 ULg)
Full Text
See detailMens immobilis. Recherches sur le corpus latin des actes et passions d'Afrique romaine (IIe-VIe siècles)
Fialon, Sabine ULg

Doctoral thesis (2012)

This thesis focuses on a corpus of thirty hagiographical texts from Roman North Africa, dated from the second to the sixth century. None synthesis on this corpus had been made since P. Monceaux’s work in ... [more ▼]

This thesis focuses on a corpus of thirty hagiographical texts from Roman North Africa, dated from the second to the sixth century. None synthesis on this corpus had been made since P. Monceaux’s work in the early twentieth century. In the first part, all the latin texts were collected, together with a translation and an exhaustive research of the sources : for many of them I gave a new critical edition, and a new text, the long recension of the Passion of Marciana, has been discovered. This corpus is then studied from an historical point of view. The first two sections examine these texts as evidence of the christianization of Africa, through the study of the complex phenomenon of persecutions and martyrdom. The third part illustrates the multiple potentialities of hagiographic discourse, which tends to make a new Christian hero, combination of pagan hero and of the theme of Judeo-Hellenistic Just suffering. The latter addresses the corpus as evidence of the literary culture of African elites and contributes to the cultural history of North Africa and of the circulation of ideas and works. It also discusses the question of the africitas, according to the methods of the LASLA of the University of Liège, methods applied to three passions of Caesarean Mauretania. [less ▲]

Detailed reference viewed: 53 (8 ULg)
Full Text
See detailNorovirus: "new" enteropathogen agents
HUYNEN, Pascale ULg

Conference (2012, December 07)

Detailed reference viewed: 7 (1 ULg)
Full Text
Peer Reviewed
See detailHorizon Partitioning of soil CO2 sources and their Isotopic Composition (13C) in a Pinus Sylvestris
Goffin, Stéphanie ULg; Parent, Florian; Plain, Caroline et al

Poster (2012, December 07)

The overall aim of this study is to contribute to a better understanding of mechanisms behind soil CO2 efflux using carbon stable isotopes. Given (i) the interest of conducting in situ studies with soil ... [more ▼]

The overall aim of this study is to contribute to a better understanding of mechanisms behind soil CO2 efflux using carbon stable isotopes. Given (i) the interest of conducting in situ studies with soil multilayer analysis and (ii) the benefits of isotopic tool to improve mechanistic understanding, these two approaches are combined. Quantifying the origin and the determinism of 13CO2 and 12CO2 production processes in the different soil layers using the gradient-efflux approach is the main goal of this work. To meet this one, the work includes an experimental setup and a modeling approach. The experimental set up (see also communication of Parent et al., session B008) comprised a combination of different systems, which were installed in a Scot Pine temperate forest at the Hartheim site (Southwestern Germany). Measurements include (i) half hourly vertical profiles of soil CO2 concentration (using soil CO2 probes), soil water content and temperature; (ii) half hourly soil surface CO2 effluxes (automatic chambers); (iii) half hourly isotopic composition of surface CO2 efflux and soil CO2 concentration profile and (iv) estimation of soil diffusivity through laboratory measurements conducted on soil samples taken at several depths. Using the data collected in the experimental part, we developed and used a diffusive transport model to simulate CO2 (13CO2 and 12CO2) flows inside and out of the soil based on Fick’s law. Given the horizontal homogeneity of soil physical parameters in Hartheim, we treated the soil as a structure consisting of distinctive layers of 5 cm thick and expressed the fick’s first law in a discrete formalism. The diffusion coefficient used in each layer was derived from (i) horizon specific relationships, obtained from laboratory measurements, between soil relative diffusivity and its water content and (ii) the soil water content values measured in situ. The concentration profile was obtained from in situ measurements. So, the main model inputs are the profiles of (i) CO2 (13CO2 and 12CO2) concentration, (ii) soil diffusion coefficient and (iii) soil water content. Once the diffusive fluxes deduced at each layer interface, the CO2 (13CO2 and 12CO2) production profile was calculated using the (discretized) mass balance equation in each layer. The results of the Hartheim measurement campaign will be presented. The CO2 source vertical profile and its link with the root and the Carbon organic content distribution will be showed. The dynamic of CO2 sources and their isotopic signature will be linked to climatic variables such soil temperature and soil water content. For example, we will show that the dynamics of CO2 sources was mainly related to temperature while changing of isotopic signature was more correlated to soil moisture. [less ▲]

Detailed reference viewed: 78 (4 ULg)
Full Text
Peer Reviewed
See detailInfluenţa fertilizării minerale asupra producţiei la amestecul de lucernă şi golomăţ în anul III de vegetaţie
Muntianu, Iulian Constantin; Stavarache, Mihai; Ciobanu, Ciprian et al

in Ţenu, Ioan; Vîntu, Vasile; Jităreanu, Gerard (Eds.) Durable Agriculture and Food Security – Priority objectives in research activity of the Ph.D. students from the UASVM Iasi (2012, December 07)

This study was conducted during three production cycles of the third year of vegetation. The main objective was to determine the production of dry matter (DM) and crude protein (CP) made under the ... [more ▼]

This study was conducted during three production cycles of the third year of vegetation. The main objective was to determine the production of dry matter (DM) and crude protein (CP) made under the influence of mixture and fertilization with nitrogen on P50 agrofond to alfalfa and orchard grass. To achieve these objectives, three variants of mixture were tested between alfalfa and cocksfoot that were applied to four rates of mineral fertilizers. The mixture 75% alfalfa (Medicago sativa L.) and 25% orchard grass (Dactylis glomerata L.) under the effect of dosing with N100P50achieved the highest production increase of DM on cycle I, 108% (5.24 Mg haDM) compared to the control, unfertilized alfalfa in pure culture (4.85 Mg ha DM). The highest increase forthe CP yield was obtained on cycle I from the 100% alfalfa fertilized with doses of N-1-1100P50, 122% (1230 kg haCP) from 100% alfalfa unfertilized (1009 kg ha CP). Alfalfa fertilized with N-1-1100P50 rate had the highest increases on total DM yield (106%, 10.64 Mg haDM) and on total quantity of CP(124%, 2304 kg ha CP). [less ▲]

Detailed reference viewed: 67 (1 ULg)
Peer Reviewed
See detailPiezocision-assisted orthodontic treatment in adult patient: A case report
CHARAVET, Carole ULg; LAMBERT, France ULg; LECLOUX, Geoffrey ULg et al

Conference (2012, December 07)

The duration of orthodontic treatments in adult patient remains a barrier for some patients. The recent scientific reports describing piezocision technique involving minimally invasive corticotomies, seem ... [more ▼]

The duration of orthodontic treatments in adult patient remains a barrier for some patients. The recent scientific reports describing piezocision technique involving minimally invasive corticotomies, seem to be of interest for these particular cases. The present communication describes the clinical case of a 20-year-old patient presenting a class I bilateral, an overcrowding of front areas with the superior canine in mesio-infraclusion and a deviated lower median line. An excellent multidisciplinary approach is mandatory for the planification of such cases. Under local anesthesia, the surgical technique involves vertical minimal incision around the teeth that need to be moved. Trough the minimal incisions, 5mm vertical alveolar osteotomies are performed using ultrasonic surgical device. No suture is necessary. The orthodontic activation is applied 1 week before the surgical procedure and the patient is recalled every 15 days to activate the orthodontic appliance. In this case self-ligating brackets were used to reduce the friction. Post-operative outcomes were painless for the patient and the complete orthodontic procedure took 7 months. The overall treatment appeared to be faster than a conventional orthodontic treatment. However, even if animal studies seem to confirm the clinical feeling described in this case report, further clinical studies including randomized controlled trials are needed to validate this treatment approach. [less ▲]

Detailed reference viewed: 146 (19 ULg)
Peer Reviewed
See detailNon-destructive measurement of volume magnetic properties of large, bulk superconductors
Vanderbemden, Philippe ULg; Dennis, T.; Shi, Y. H. et al

Conference (2012, December 07)

The development of large, single grain bulk superconductors by melt processing techniques has generated a need to characterize samples magnetically over large dimensions, exceeding typically 20 mm in ... [more ▼]

The development of large, single grain bulk superconductors by melt processing techniques has generated a need to characterize samples magnetically over large dimensions, exceeding typically 20 mm in diameter. The usual magnetic characterization gives relies on miniature Hall probe mapping and gives information about the field distribution above the sample surface. If volume properties are required (e.g. magnetization hysteresis loops), the sample needs to be cut in smaller pieces, since the DC magnetic characterization systems for measurements at cryogenic temperatures generally accommodate samples of relatively small size (typically < 5-10 mm diameter). In this work we describe how the hysteresis B(H) loops of large bulk superconducting samples exceeding 10 mm diameter can be determined using home-made sensing coils, either in liquid nitrogen or within the experimental chamber of a Quantum Design Physical Property Measurement System (PPMS). Magnetic properties are measured and compared to those given by several Hall probes attached to both faces of sample. The system is used successfully to measure the DC hysteresis loops of entire (RE)BCO bulk superconducting domains. A careful data acquisition and numerical integration of pick-up coil voltage enables the sweep rate of the magnetic field to be varied from 0.5 to 10 mT/s while keeping an excellent signal/noise ratio. A simple model based on demagnetizing field approach is used to emphasize how the hysteresis loops determined by this technique differ from “true” magnetization loops derived from classical magnetic moment measurements (e.g. SQUID or VSM). These differences are supported with numerical modelling of the average magnetization of the bulk sample using the Brandt method. [less ▲]

Detailed reference viewed: 105 (28 ULg)