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See detailA one phase thermomechanical model for the numerical simulation of semi-solid material behavior. Application to thixoforming
Koeune, Roxane; Ponthot, Jean-Philippe ULg

in International Journal of Plasticity (2014), 58

This work deals with the development of an appropriate constitutive model for semi-solid thixoforming processes of metallic alloys. These processes rely on a very specific material behavior called ... [more ▼]

This work deals with the development of an appropriate constitutive model for semi-solid thixoforming processes of metallic alloys. These processes rely on a very specific material behavior called thixotropy that can be displayed by some metallic alloys heated up to their semi-solid state. It is a particular evolutionary behavior which is characterized by a solidlike behavior at rest and a liquid flow during shearing, thus by a decrease of the viscosity and of the resistance to deformation while sheared. An original one-phase thermo-elasto-viscoplastic constitutive model has been developed. The basic idea is to extend the classical isotropic hardening and viscosity models beyond the solid state by considering two more non-dimensional internal scalar parameters. The semi-solid state is treated as a particular case, and one of the main features of the proposed constitutive model is that it remains valid over a wide range of temperatures, starting from room temperature to above the liquidus in a continuous manner, thus allowing a continuous transition between classical solid and fluid behavior. Another feature is that, after the forming step, it is possible to simulate the cooling down of the component back to room temperature using the elastic–viscoplastic model. So it is possible to estimate residual stresses, something that is definitely impossible while using a fluid-like model or a rigid viscoplastic approach. The presented model is illustrated and validated by means of representative numerical applications, as two different extrusion tests are carried out and the computed predictions are compared to experimental results. [less ▲]

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See detailOne session assessment of pulmonary arteries and peripheral veins by spiral CT angiography in acute pulmonary embolism
GHAYE, B; SZAPIRO, D; WILLEMS, V et al

in Resuscitation (2000), 45

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See detailOne step closer to a cook book method for dioxin analysis part 1: The procedure
Focant, Jean-François ULg; Shirkhan, H.; Patterson, Donald G.

in Organohalogen Compounds (2009), 71

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See detailOne step closer to a cook book method for dioxin analysis part 2: Analysis of food samples
Focant, Jean-François ULg; Shirkhan, H.; Patterson, Donald G. et al

in Organohalogen Compounds (2009), 71

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See detailOne step enzymatic process for producing alkyl furanosides
Daniellou, Richard; Nugier-Chauvin, Caroline; Ferrieres, Vincent et al

Patent (2013)

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See detailOne step purification of mouse monoclonal antibodies from ascitic fluid by DEAE affigel blue chromatography.
Bruck, Claudine; Portetelle, Daniel ULg; Glineur, C. et al

in Journal of Immunological Methods (1982), 53

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See detail"One to rule them all"? The standardisation of nanotechnologies
Thoreau, François ULg

in European Journal of Risk Regulation (2011), 3

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See detailOne year experience of the Belgian Liver Intestine Comittee (BLIC) intranet database
Lerut, Jan; Roggen, F.; De Hemptinne, Bernard et al

in Acta Gastro-Enterologica Belgica (2001, January), 64(1), 7

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See detailOne year follow-up of ankle-brachial blood pressure index in hemodialized patients
Saint-Remy, Annie ULg; Sumaili, Ernest; Dubois, Bernard ULg et al

in Kidney & Blood Pressure Research (2006), 29

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See detailOne Year's Treatment of Paget's Disease of Bone by Synthetic Salmon Calcitonin as a Nasal Spray
Reginster, Jean-Yves ULg; Jeugmans-Huynen, A. M.; Albert, Adelin ULg et al

in Journal of Bone and Mineral Research : The Official Journal of the American Society for Bone and Mineral Research (1988), 3(3), 249-52

The effectiveness of synthetic salmon calcitonin (SCT) administered as a nasal spray was assessed via clinical, biological, and radiological variables in 17 previously untreated Pagetic patients over a 1 ... [more ▼]

The effectiveness of synthetic salmon calcitonin (SCT) administered as a nasal spray was assessed via clinical, biological, and radiological variables in 17 previously untreated Pagetic patients over a 1-year course of therapy. The results showed a highly significant decrease of serum alkaline phosphatase (S-ALP) (p less than 0.05 after 1 month of treatment) and of the urinary hydroxyproline/creatinine ratio (OH/Cr) (p less than 0.01 after 1 month of treatment). For the whole group, the mean decrease in S-ALP was 37 +/- 4% (SEM) after 6 months (p less than 0.01) and 31 +/- 5% after 1 year (p less than 0.01). The mean fall in OH/Cr was 35 +/- 6% (SEM) (p less than 0.01) and 37 +/- 7% (p less than 0.01) after 6 and 12 months, respectively. None of the usual side-effects of SCT were reported and local tolerance was excellent throughout the study. [less ▲]

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See detailOne's Own Face Is Hard to Ignore
Brédart, Serge ULg; Delchambre, Marie ULg; Laureys, Steven ULg

in Quarterly Journal of Experimental Psychology (2006), 59(1), 46-52

One's own face possesses two properties that make it prone to grab attention: It is a face, and, in addition, it is a self-referential stimulus. The question of whether the self-face is actually an ... [more ▼]

One's own face possesses two properties that make it prone to grab attention: It is a face, and, in addition, it is a self-referential stimulus. The question of whether the self-face is actually an especially attention-grabbing stimulus was addressed by using a face-name interference paradigm. We investigated whether interference from a flanking self-face on the processing of a target classmate's name was stronger than interference from a classmate's flanking face on the processing of one's own name as the target. In a control condition a third familiar face served as the flanker for both decisions from the participant's own name and from the classmate's name. The presentation of the self-face as a flanker produced significantly more interference on the identification of a classmate's name than the presentation of that classmate's face did on the identification of one's own name. This result was due to the interfering power of the self-face and not to a particular resistance of one's name to interfering facial stimuli. We argue that the emotional value or the high familiarity of one's own face may explain its attention-grabbing property. [less ▲]

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See detailOne-dimensional modelling of the plankton ecosystem of the north-western Corsican coastal area in relation to meteorological constraints
Skliris, Nikos; Elkalay, Khalid; Goffart, Anne ULg et al

in Journal of Marine Systems (2001), 27

In order to study the influence of wind mixing on the spring variability of the plankton production of the north western Corsican coastal area, a one-dimensional (1D), vertical, coupled hydrodynamic ... [more ▼]

In order to study the influence of wind mixing on the spring variability of the plankton production of the north western Corsican coastal area, a one-dimensional (1D), vertical, coupled hydrodynamic / biological model (ECOHYDROMV) is used. A hydrodynamic 1D model of the water column with a k–l turbulent closure is applied. The biological model comprises six state variables, representing the plankton ecosystem in the spring period: phytoplankton, copepods, nitrate, ammonium, particulate organic matter of phytoplanktonic origin and particulate organic matter of zooplanktonic origin. The system is influenced by turbulence (expressed by the vertical eddy diffusivity), temperature and irradiance. The model takes into account momentum and heat surface fluxes computed from meteorological data in order to simulate a typical spring atmospheric forcing for the considered area. Results show that primary production vertical structure is characterised by a subsurface maximum which deepens with time and is regulated by the opposite gradients of nitrate concentration and irradiance. Surface plankton productivity is mainly controlled by turbulent vertical transport of nutrients into the mixed layer. The short time scale variability of turbulent mixing generated by the wind appears to be responsible for the plurimodal shape of plankton blooms, observed in the considered area. Furthermore, the model is applied to the study of the spring evolution of the plankton communities off the bay of Calvi (Corsica) for the years 1986 and 1988. In order to initiate and validate the model, time series of hydrological, chemical and biological data have been used. The model reproduces accurately the spring evolution of the phytoplankton biomass measured in situ and illustrates that its strong variability in those years was in close relation to the variability of the wind intensity. [less ▲]

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See detailOne-dimensional time-dependent model of cardiac pacemaker activity generated by mechano-electric feedback in a thermo-electro-mechanical context
Collet, Arnaud ULg; Dauby, Pierre ULg

in Archives des Maladies du Coeur et des Vaisseaux. Pratique (2011, December), (Hors-série 3), 20

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See detailOne-dimensional unsteady flow simulations in nets of variable cross-section arms: comparison between finite element method and method of characteristics
Pochet, Thierry; Pirotton, Michel ULg

in Blain, W. R.; Cabrera, E. (Eds.) Hydraulic Engineering Software IV, Computer Techniques and Applications (1992)

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See detailA one-field discontinuous Galerkin formulation of non-linear Kirchhoff-Love shells
Noels, Ludovic ULg

in International Journal of Material Forming (2009), 2(Suppl. 1), 877-880

Spatially-discontinuous Galerkin methods constitute a generalization of weak formulations, which allow for discontinuities of the problem unknowns in its domain interior. This is particularly appealing ... [more ▼]

Spatially-discontinuous Galerkin methods constitute a generalization of weak formulations, which allow for discontinuities of the problem unknowns in its domain interior. This is particularly appealing for problems involving high-order derivatives, since discontinuous Galerkin (DG) methods can also be seen as a means of enforcing higher-order continuity requirements. Recently, DG formulations of linear and non-linear Kirchhoff-Love shell theories have been proposed. This new one-field formulations take advantage of the weak enforcement in such a way that the displacements are the only discrete unknowns, while the C1 continuity is enforced weakly. The Resulting one field formulation is a simple and efficient method to model thin structures and can be applied to various computational methods. [less ▲]

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