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See detailBehaviour of an engineered clay barrier for A nuclear waste isolation system
François, Bertrand ULg; Laloui, Lyesse

in Computational Methods for Coupled Problems in Science and Engineering, Coupled Problems’09 (2009)

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See detailBehaviour of an engineered clay barrier involved in a prospective nuclear waste isolation system
François, Bertrand ULg; Laloui, Lyesse

in 1st International Symposium on Computational Geomechanics (ComGeo I) (2009)

In a few years, safe and definitive solutions should be ready to manage large quantities of high-level radioactive waste. Deep geological repository involving a multibarrier system constitutes one of the ... [more ▼]

In a few years, safe and definitive solutions should be ready to manage large quantities of high-level radioactive waste. Deep geological repository involving a multibarrier system constitutes one of the most promising options to isolate such waste from the human environment. In order to provide reasonable assurance of the waste isolation efficiency, it is essential to understand the behaviour of the confining geomaterials under a variety of environmental conditions. In particular, variations in temperature and humidity are two main critical aspects in the short and medium term (i.e. several thousands of years). To this end, results from a near-to-real scale experiment were studied by means of a thermo-hydro-mechanical (THM) finite element approach including a consistent thermo-plastic constitutive model for unsaturated soils. This enabled a comprehensive understanding of the behaviour of the buffer material (bentonite). [less ▲]

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See detailBehaviour of bolted flange joints in tubular structures under monotonic, repeated and fatigue loadings I: Experimental tests
Hoang, Van Long ULg; Jaspart, Jean-Pierre ULg; Demonceau, Jean-François ULg

in Journal of Constructional Steel Research (2013), 85

This paper presents a test program on bolted flange plate connections used in circular tubular structures. In the tested joints, the connected tubular elements are made of high strength steel (TS590 ... [more ▼]

This paper presents a test program on bolted flange plate connections used in circular tubular structures. In the tested joints, the connected tubular elements are made of high strength steel (TS590) whilst normal steel grade (S355) is used for the flanges. The tests were performed under monotonic loadings to obtain the mechanical properties of the connections and under cyclic loadings to characterise the behaviour of these connections for low cycle and high cycle fatigue. The test results are first presented herein, including a critical analysis of the latter; then, designmethods available in literature are applied for the tested configurations with the objective to investigate the accuracy of these methods through comparisons with the experimental results. [less ▲]

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See detailThe behaviour of coatings on concrete supports in relation with different forms of water attack
Courard, Luc ULg; Degeimbre, Robert ULg; Wiertz, Jean

in Concrete under severe conditions 2 (1998)

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See detailThe behaviour of cow blastocyst in vitro: cinematographic and morphometric analysis.
Massip, A.; Mulnard, J.; Vanderzwalmen, P. et al

in Journal of Anatomy (1982), 134(Pt 2), 399-405

The behaviour of the cow blastocyst in vitro was studied by time-lapse cinematography and analysed by morphometry. Three types of behaviour were observed: continuous expansion followed by hatching ... [more ▼]

The behaviour of the cow blastocyst in vitro was studied by time-lapse cinematography and analysed by morphometry. Three types of behaviour were observed: continuous expansion followed by hatching; discontinuous expansion interrupted by few contractions and followed by hatching; discontinuous expansion interrupted by several rapid contractions without hatching. This demonstrated that the pulsatile activity of the blastocyst is not a necessary condition of hatching but also that only a moderate pulsatile activity is compatible with normal hatching. The time of hatching in vitro corresponded approximately with the time of zona loss in vivo (9-10 days). Rupture of the zona occurred at any point of the trophoblast layer. Hatching by herniation through a reduced opening of the zona was occasionally observed. The behavior of the embryos from a particular animal was very similar but differences were noted between embryos from different animals. [less ▲]

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See detailBehaviour of Crohn's Disease According to the Vienna Classification: Changing Pattern over the Course of the Disease
Louis, Edouard ULg; Mathieu, Anne ULg; Oger, A. F. et al

in Gut (2001), 49(6), 777-82

BACKGROUND: Crohn's disease is a heterogeneous disorder with both a genetic and environmental aetiology. Clinical classifications of the disease, such as the newly proposed Vienna classification, may help ... [more ▼]

BACKGROUND: Crohn's disease is a heterogeneous disorder with both a genetic and environmental aetiology. Clinical classifications of the disease, such as the newly proposed Vienna classification, may help to define subgroups of patients suitable for studying the influence of specific genetic or environmental factors. AIM: To assess the stability over the course of the disease of its location and behaviour, as determined according to the Vienna classification. PATIENTS AND METHODS: The notes of 297 Crohn's disease patients regularly followed up at our institution were carefully reviewed retrospectively. The behaviour and location of the disease according to the Vienna classification were determined at diagnosis and after 1, 3, 5, 10, 15, 20, and 25 years of follow up. The proportions of the different behaviours and locations of the disease were calculated at these time points. A statistical analysis of the evolution of these characteristics over 10 years was performed on a subgroup of 125 patients with at least 10 years of follow up. The influence of age at diagnosis on location and behaviour of the disease was assessed as well as the influence of location on the behaviour of the disease. RESULTS: The location of the disease remained relatively stable over the course of the disease. Although the proportion of patients who had a change in disease location became statistically significant after five years (p=0.01), over 10 years only 15.9% of patients had a change in location (p<0.001). We observed a more rapid and prominent change in disease behaviour, which was already statistically significant after one year (p=0.04). Over 10 years, 45.9% of patients had a change in disease behaviour (p<0.0001). The most prominent change was from non-stricturing non-penetrating disease to either stricturing (27.1%; p<0.0001) or penetrating (29.4%; p<0.0001) disease. Age at diagnosis had no influence on either location or behaviour of disease. Ileal Crohn's disease was more often stricturing, and colonic or ileocolonic Crohn's disease was more often penetrating: this was already the case at diagnosis and became more prominent after 10 years (p<0.05). CONCLUSIONS: Location of Crohn's disease, as defined by the Vienna classification, is a relatively stable phenotype which seems suitable for phenotype-genotype analyses. Behaviour of Crohn's disease according to the Vienna classification varies dramatically over the course of the disease and cannot be used in phenotype-genotype analyses. The potential influence of genes on the behaviour of Crohn's disease should be studied in subgroups of patients defined by their disease behaviour after a fixed duration of disease. [less ▲]

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See detailBehaviour of Deep Reinforced Concrete Beams under Monotonic and Reversed Cyclic Loading
Mihaylov, Boyan ULg; Bentz, Evan; Collins, Michael

Conference (2009, May 22)

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See detailBehaviour of EMP under shear loadings
Phung Ngoc, Dung ULg; Degée, Hervé ULg; Plumier, André ULg

in Behaviour of EMP under shear loadings- SDSS 2010 (2010)

Experimental and theoretical study of expanded metal panels (EMP) has shown that they are useful for seismically retrofitting reinforced concrete moment resisting frames (RC-MRF). Although this product ... [more ▼]

Experimental and theoretical study of expanded metal panels (EMP) has shown that they are useful for seismically retrofitting reinforced concrete moment resisting frames (RC-MRF). Although this product has merit of strength and ductility, it is at present only used for non-structural applications. There is no guidance existing to help the engineers determine the mechanical properties or to indicate in which field of the structures this product can be used. With the aims at providing quantitative data for these purposes and at introducing a simplified model of EMP working in shear, description and comparison of the results of 22 monotonic and cyclic experiments of 4 profiles of EMP in small and large scale is presented. Numerical approach with FINELG, a nonlinear finite element code developed at University of Liege, is used to calibrate and simulate the tests. A good correlation between tests and numerical simulations is observed. [less ▲]

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See detailBehaviour of Grade 8.8 bolts under natural fire conditions - Tests and model
Hanus, François; Zilli, Guiliana; Franssen, Jean-Marc ULg

in Journal of Constructional Steel Research (2011), 67

Recent full-scale experimental tests perfomed on steel andcomposite structures have demonstrated that the presence of tensile forces in axially-restrained beams during the cooling phase of a fire could ... [more ▼]

Recent full-scale experimental tests perfomed on steel andcomposite structures have demonstrated that the presence of tensile forces in axially-restrained beams during the cooling phase of a fire could lead to bolt failures. In order to understand this observation and design structures that are not prone to such a failure mode, it is essential to have a deep knowledge of the material behaviour of all the components, including bolts, during both the heating and the cooling phase. In the present article, the test set-ups and the results of the tensile and shear tests performed at the CSM (Italy) on Grade 8.8 bolts under heating-cooling cycles are described. Then, material laws are defined for characterising the mechanical behaviour of Grade 8.8 bolts under heating and cooling phases. these laws account for the non-reversibility of the mechanical properties of Grade 8.8 bolts [less ▲]

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See detailThe behaviour of H.V. strained cables due to short-circuit currents
Lilien, Jean-Louis ULg; Pirotte, Pol

in Proceedings of the first symposium on electric power systems in fast developing countries. (1987, March 21)

Th epaper proposes a calculation method for flexible busbars in substation, cable of overhead lines during a short-circuit. It helps to define loads on structures for their design.

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See detailBehaviour of minor-axis joints and 3D joints
Gomes, F.; Jaspart, Jean-Pierre ULg; Maquoi, René ULg

in Proceedings of the Second State of the Art COST C1 Workshop (1994)

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See detailBehaviour of nucleolus during mitosis. A comparative ultrastructural study of various cancerous cell lines using the Ag-NOR staining procedure.
Ploton, D.; Thiry, Marc ULg; Menager, M. et al

in Chromosoma (1987), 95(2), 95-107

The aim of the present work was to study the distribution and the behaviour of the silver-staining nucleolar organizer region (Ag-NOR) proteins at the ultrastructural level during interphase and mitosis ... [more ▼]

The aim of the present work was to study the distribution and the behaviour of the silver-staining nucleolar organizer region (Ag-NOR) proteins at the ultrastructural level during interphase and mitosis in five human and murine cancerous cell lines each characterized by a typical nucleolar morphology. During interphase the Ag-NOR proteins are restricted to the fibrillar centres (F.C.) and/or to the dense fibrillar component (D.F.C.). During prophase the silver-staining components come into close contact with some chromosomes and are arranged with a typical polarity: chromosome, F.C. and D.F.C. Then F.C. and D.F.C. together form roundish silver-stained structures and integrate in part within indentations at the periphery of the metaphase chromosomes. During anaphase and telophase large and small spherical silver-staining structures may be seen. They correspond respectively to the metaphase NORs and to numerous structures which appear de novo within ribonucleoprotein (RNP) material localized between the chromosomes. During late telophase the number of the small silver-staining structures decreases whereas the size of the larger ones increases. Then the interphase nucleoli recover their typical shape. These results suggest that when rRNA synthesis is impaired during mitosis the inactive NORs assume a structure and a localization which are not typical of the cell line. In contrast the F.C. and D.F.C. are probably two aspects of the NORs whose typical distribution, relative to the other nucleolar components, gives the interphasic nucleolus its characteristic morphology. [less ▲]

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See detailBehaviour of seismic resistant braced frames with innovative dissipative (INERD) connections
Vayas, I.; Thanopoulos, P.; Castiglioni, C. et al

in Proceedings of the EUROSTEEL Conference 2005 (2005)

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See detailBehaviour of single sided composite joints at room temperature and in case of fire after an earthquake
Demonceau, Jean-François ULg; Hanus, François ULg; Jaspart, Jean-Pierre ULg et al

in International Journal of Steel Structures (2009), 9(4), 329-342

In 2003, a European research program entitled “PRECIOUS - Prefabricated composite beam-to-concrete filled tube or partially reinforced-concrete-encased column connections for severe seismic and fire ... [more ▼]

In 2003, a European research program entitled “PRECIOUS - Prefabricated composite beam-to-concrete filled tube or partially reinforced-concrete-encased column connections for severe seismic and fire loadings” and funded by the Research Fund for Coal and Steel (RFCS) was initiated for three years (Bursi et al, 2008). The objective of this project was to develop fundamental data, design guidelines and prequalification tools for two types of composite beam-to-column joints able to ensure a suitable behaviour during an earthquake and its eventual subsequent fire. At the University of Liege, as part of this project, analytical and numerical investigations were conducted mainly on single-sided beam-to-column composite joints at room and at elevated temperatures. The present paper summarizes the activities developed within this project and presents the main achievements. [less ▲]

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See detailThe behaviour of spacerless bundles due to high load current
Adami, H.; Leppers, P. H.; Lilien, Jean-Louis ULg

in Electra (1983), 90

Overhead power lines with bundle conductors may be equipped without spacers. In such case overload may induce kissing phenomena or collapsing inside the bundle. This paper , following the first one ... [more ▼]

Overhead power lines with bundle conductors may be equipped without spacers. In such case overload may induce kissing phenomena or collapsing inside the bundle. This paper , following the first one published also in ELECTRA this year, is describing the final formulation of the kissing current level, validated by scale model and full scale test on unspacered twin bundle line in vertical arrangement. [less ▲]

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See detailThe behaviour of spacerless bundles
Leppers, P. H.; Lilien, Jean-Louis ULg

in Electra (1983), 81

Overhead power lines in bundle conductors are sometimes installed without any spacers, mainly as a prevention against galloping phenomena. But such arrangement may cause some conductor collapse inside the ... [more ▼]

Overhead power lines in bundle conductors are sometimes installed without any spacers, mainly as a prevention against galloping phenomena. But such arrangement may cause some conductor collapse inside the bundle during high load current (so called kissing phenomena). AFter such event, it is difficult to separate the subconductors and dramatic noise is created. The paper analyse the proble and model it to understand all parameters linked with it. [less ▲]

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See detailBehaviour of steel pallet rack structures under exceptional loading conditions - partial report
zaharia, raul; Franssen, Jean-Marc ULg

Report (2000)

In this report, the general context of steel storage rack systems subjected to fire is first introduced. The second section of the report is dedicated to the numerical finite element modelling of the ... [more ▼]

In this report, the general context of steel storage rack systems subjected to fire is first introduced. The second section of the report is dedicated to the numerical finite element modelling of the resistance and stability behaviour of a system in a particular building under static loading at ambient temperature. [less ▲]

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See detailBehaviour of the yeast and mycelial forms of Yarrowia lipolytica during biotransformation of ricinoleic acid
Aguedo, Mario ULg; Waché, Y.; Seguin, M. et al

Poster (1999, September)

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See detailBehavioural adaptations of rheophilic fish radio-tracked in a river highly fragmented by hydroelectric plants. Outcomes of a partial reopening of their migration routes.
Ovidio, Michaël ULg; Dierckx, Arnaud ULg; Benitez, Jean-Philippe ULg et al

in Proceedings of the 9th International Conference on Ecohydraulics (2012, September)

Using water resources for hydroelectricity production influences and limits the quality and quantity of habitat available for use by fishes and influences fish mobility. In the Amblève (River Meuse basin ... [more ▼]

Using water resources for hydroelectricity production influences and limits the quality and quantity of habitat available for use by fishes and influences fish mobility. In the Amblève (River Meuse basin, Belgium), the major part of the river is fragmented by hydroelectric power plants that largely prevent the biological movements of the fish population. In 2007, in the hydroelectric site of Lorcé, a modern pool-type fish pass was constructed, re-establishing the upstream movements of fish after more than 80 years of total obstruction. Sixteen different fish species promptly used the new fish pass and the objective of our study was to analyse their behavioural tactics and spawning activity once released upstream of the dam in a previously inaccessible environment. The study focussed on rheophilic holobiotic species, the nase (Chondrostoma nasus), the barbel (Barbus barbus), the European grayling (Thymallus thymallus) and the brown trout (Salmo trutta), which are highly representative of the fish population of the river. The fish were radio-tagged and intensively located using manual tracking techniques during their circum reproduction periods. The results indicate that most individuals of the different species seem to have found usable spawning areas and exploited a large part of the newly usable river stretch (as well as tributaries) located upstream of the fish pass. However, a major problem was observed during the post-spawning period, when the tracked individuals tried to reach their original departure sites (located downstream of the fish pass). The absence of a downstream migration device combined with the passage of all the water through the turbine severely disrupted their post-reproductive movements. [less ▲]

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