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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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See detailA behavioural analysis of the conditioned drug effects and the context-specific sensitization produced by a low and a high dose of cocaine
Michel, Anne; Tirelli, Ezio ULg

in International Journal of Neuropsychopharmacology (2000), 3(Supplement), 130

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See detailBehavioural and physiological effects of testosterone propionate and cyproterone acetate in immature male domestic ducks, Anas platyrhynchos.
Balthazart, Jacques ULg

in Zeitschrift für Tierpsychologie (1978), 47(4), 410-21

The behavioural and morphological effects of testosterone propionate and of the antiandrogen cyproterone acetate were studied in male domestic ducks. Testosterone was also measured by radioimmunoassay in ... [more ▼]

The behavioural and morphological effects of testosterone propionate and of the antiandrogen cyproterone acetate were studied in male domestic ducks. Testosterone was also measured by radioimmunoassay in the plasma of these birds to relate the behaviour to the actual circulating levels of hormone. Testosterone stimulates sexual behaviour but has few effects on social displays. There is no correlation between the individual variations of plasma testosterone and sexual behaviour. [less ▲]

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See detailBehavioural and physiological responses of Gammarus fossarum (Crustacea Amphipoda) exposed to silver
Arce Funck, Julio; Danger, Michael; Gismondi, Eric ULg et al

in Aquatic Toxicology (2013), 142-143

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See detailBehavioural Ecology of Bonobos (Pan paniscus) in the Forest-Savannah Mosaics of Western Democratic Republic of Congo
Vimond, Marie; Serckx, Adeline ULg; Beudels-Jamar, Roseline et al

in Folia Primatologica : International Journal of Primatology = Internationale Zeitschrift für Primatologie = Journal international de Primatologie (2013)

The long-term survival of the Endangered bonobo (IUCN, 2012) will depend on well thought out conservation programmes that need to be built both upon the species’ ecological requirements and local socio ... [more ▼]

The long-term survival of the Endangered bonobo (IUCN, 2012) will depend on well thought out conservation programmes that need to be built both upon the species’ ecological requirements and local socio-economics realities. Yet there is still a lot to find out, including information on the species geographical distribution. In 2005, the presence of a western population was confirmed in the forest-savannah mosaic in the south-western part of the Lake Tumba Landscape. With the exception of an early study carried out in Lukuru, the species is mainly known from lowland rainforest research sites in the Cuvette Centrale. The western forest-savannah mosaic is an ecotone with a marked seasonal pattern, a high variability of habitats and monthly variations in fruit production. All this leads to spatio-temporal variation of food availability. In order to increase studies and monitoring of this unique population, WWF initiated a habituation process of two groups of bonobos 6 years ago. The groups are now semi-habituated, making the collection of direct daily observations possible. Our objective is to describe the behavioural strategies developed by this population in order to cope with spatio-temporal variations of food availability. This will be approached by identifying daily activity, ranging and grouping patterns, in order to understand how they affect social structure. It should also allow us to define the use of savannahs. Our findings will help determine specific conservations measures for this endangered species. [less ▲]

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