Publications ORBi OA
Bookmark and Share    
Full Text
Peer Reviewed
See detailDefining the role of aromatase inhibitors in the adjuvant endocrine treatment of early breast cancer
BUDZAR, A.; CHLEBOWSKI, R.; CUZICK, J. et al

in Current Medical Research & Opinion (2006), 22

Detailed reference viewed: 12 (4 ULg)
Full Text
See detailNew generation phase coronagraphy
Mawet, Dimitri; Riaud, Pierre; Baudrand, Jacques et al

Poster (2006)

Detailed reference viewed: 11 (1 ULg)
Full Text
See detailThe ability of five radioimmunoassay systems to detect early pregnancy-associated glycoprotein in bovine plasma.
Ayad, A.; Melo de Sousa, Noelita ULg; Sulon, J. et al

in Proceedings of the 22nd Scientific Meeting of the European Embryo Transfer Association (2006)

Detailed reference viewed: 11 (1 ULg)
Full Text
Peer Reviewed
See detailOn the application and interpretation of Keeling plots in paleo climate research - Deciphering δ 13C of atmospheric CO 2 measured in ice cores
Köhler, Peter; Fischer, Hubertus; Schmitt, Jochen et al

in Biogeosciences (2006), 3(4), 539-556

The Keeling plot analysis is an interpretation method widely used in terrestrial carbon cycle research to quantify exchange processes of carbon between terrestrial reservoirs and the atmosphere. Here, we ... [more ▼]

The Keeling plot analysis is an interpretation method widely used in terrestrial carbon cycle research to quantify exchange processes of carbon between terrestrial reservoirs and the atmosphere. Here, we analyse measured data sets and artificial time series of the partial pressure of atmospheric carbon dioxide (pCO(2)) and of delta C-13 of CO2 over industrial and glacial/interglacial time scales and investigate to what extent the Keeling plot methodology can be applied to longer time scales. The artificial time series are simulation results of the global carbon cycle box model BICYCLE. The signals recorded in ice cores caused by abrupt terrestrial carbon uptake or release loose information due to air mixing in the firn before bubble enclosure and limited sampling frequency. Carbon uptake by the ocean cannot longer be neglected for less abrupt changes as occurring during glacial cycles. We introduce an equation for the calculation of long-term changes in the isotopic signature of atmospheric CO2 caused by an injection of terrestrial carbon to the atmosphere, in which the ocean is introduced as third reservoir. This is a paleo extension of the two reservoir mass balance equations of the Keeling plot approach. It gives an explanation for the bias between the isotopic signature of the terrestrial release and the signature deduced with the Keeling plot approach for long-term processes, in which the oceanic reservoir cannot be neglected. These deduced isotopic signatures are similar (-8.6 parts per thousand) for steady state analyses of long-term changes in the terrestrial and marine biosphere which both perturb the atmospheric carbon reservoir. They are more positive than the delta C-13 signals of the sources, e.g. the terrestrial carbon pools themselves (similar to -25 parts per thousand). A distinction of specific processes acting on the global carbon cycle from the Keeling plot approach is not straightforward. In general, processes related to biogenic fixation or release of carbon have lower y-intercepts in the Keeling plot than changes in physical processes, however in many case they are indistinguishable (e.g. ocean circulation from biogenic carbon fixation). [less ▲]

Detailed reference viewed: 82 (9 ULg)
Full Text
Peer Reviewed
See detailTemporal shift of diet in alternative cannibalistic morphs of the tiger salamander
Denoël, Mathieu ULg; Whiteman, Howard H.; Wissinger, Scott A.

in Biological Journal of the Linnean Society (2006), 89(2), 373-382

Evolutionary theory predicts that alternative trophic morphologies are adaptive because they allow a broad use of resources in heterogeneous environments. The development of a cannibal morphology is ... [more ▼]

Evolutionary theory predicts that alternative trophic morphologies are adaptive because they allow a broad use of resources in heterogeneous environments. The development of a cannibal morphology is expected to result in cannibalism and high individual fitness, but conflicting results show that the situation is more complex. The goal of the present study was to increase our understanding of the ultimate benefits of a cannibalistic polyphenism by determining temporal changes in the feeding habits and biomass intake in a population of tiger salamanders (Ambystoma tigrinum nebulosum). Cannibals in this species develop a larger head than typicals and have prominent teeth, both useful for consuming large prey. Although cannibalism was only detected in cannibal morphs, large temporal variation in resource partitioning was found between morphs. The two morphs always differed in their foraging habits, but cannibalism mainly occurred immediately after the ontogenetic divergence between morphs. Cannibals shifted their foraging later to a more planktivorous diet (i.e. the primarily prey of the typical morph). Cannibals also obtained more prey biomass than typicals. These results indicate that the cannibalistic morph is advantageous over the typical development, but that these advantages vary ontogenetically. Although the results obtained are consistent with models predicting the maintenance of cannibalism polyphenism in natural populations, they show that the foraging tactics utilized by cannibal morphs, and the fitness consequences accrued by such tactics, are likely to be more complex and dynamic than previous studies have suggested. (c) 2006 The Linnean Society of London. [less ▲]

Detailed reference viewed: 112 (8 ULg)
Full Text
See detail"Droit des biens et sociétés : de certaines influences"
Lecocq, Pascale ULg

in Revue de la Faculté de Droit de l'Université de Liège (2006)

Detailed reference viewed: 19 (1 ULg)
Full Text
See detailRetour sur le Conseil Wallon de l'Economie Sociale: quel héritage?
Defourny, Jacques ULg

in SAW-B Analyses (2006), 7

Detailed reference viewed: 15 (3 ULg)
Full Text
Peer Reviewed
See detailNumerical simulation of impedance and admittance of OLEDs
Nguyen, Ngoc Duy ULg; Schmeits, Marcel

in Physica Status Solidi : A. Applications and Materials Science (2006), 203

The electrical characteristics of organic light-emitting devices are calculated for the dc and ac regimes by numerically solving the basic semiconductor equations under steady-state and small-signal ... [more ▼]

The electrical characteristics of organic light-emitting devices are calculated for the dc and ac regimes by numerically solving the basic semiconductor equations under steady-state and small-signal conditions. For a given structure, the dc and ac electric potential and electric field, the electron and hole concentrations, as well as the different components of the current density are obtained as function of the one-dimensional spatial coordinate. This approach allows a detailed microscopic description of the dependencies of these quantities on the applied steady-state voltage V0 and the frequency of the modulating voltage. The final output consists in the frequency-dependent complex admittance and impedance of the device, the real and imaginary parts of which are the experimentally-available data. As a typical example, we show the results for a two-layer structure where α-NPD is the hole-transporting material and Alq3 the electron-transporting material. The anode is made of ITO and Al/LiF composes the cathode. The admittance and impedance curves, yielded by the numerical simulation as functions of the modulation frequency, are fitted by an equivalent electrical circuit, the elements of which are resistances and capacitances. The number of com- ponents depends on the structure composition and on the applied steady-state voltage. We show that each element can be associated with a particular region of the device. This allows to correlate the dependence of each feature of the admittance and impedance curves with one or several parameters describing the ma- terial system. Such an analysis can be useful for the inverse approach, where, starting from measurements of the electrical ac characteristics, the aim is to get information on the microscopic mechanisms which contribute to the electrical conduction of the device. [less ▲]

Detailed reference viewed: 93 (8 ULg)
Full Text
Peer Reviewed
See detailThe epileptic syndromes with continuous spikes and waves during slow sleep: definition and management guidelines.
Van Bogaert, P.; Aeby, A.; De Borchgrave, V. et al

in Acta Neurologica Belgica (2006), 106(2), 52-60

The authors propose to define the epileptic syndromes with continuous spikes and waves during slow sleep (CSWS) as a cognitive or behavioral impairment acquired during childhood, associated with a strong ... [more ▼]

The authors propose to define the epileptic syndromes with continuous spikes and waves during slow sleep (CSWS) as a cognitive or behavioral impairment acquired during childhood, associated with a strong activation of the interictal epileptiform discharges during NREM sleep--whatever focal or generalized--and not related to another factor than the presence of CSWS. The type of syndrome will be defined according to the neurological and neuropsychological deficit. These syndromes have to be classified among the localization-related epileptic syndromes. Some cases are idiopathic and others are symptomatic. Guidelines for work-up and treatment are proposed. [less ▲]

Detailed reference viewed: 141 (4 ULg)
Full Text
Peer Reviewed
See detailPatient Preference in the Management of Postmenopausal Osteoporosis with Bisphosphonates
Reginster, Jean-Yves ULg; Rabenda, Véronique ULg

in Clinical Interventions in Aging (2006), 1(4), 415-23

The leading treatments for postmenopausal osteoporosis are the nitrogen-containing bisphosphonates, which are required long term for optimal benefit. Oral bisphosphonates have proven efficacy in ... [more ▼]

The leading treatments for postmenopausal osteoporosis are the nitrogen-containing bisphosphonates, which are required long term for optimal benefit. Oral bisphosphonates have proven efficacy in postmenopausal osteoporosis in clinical trials, but in practice the therapeutic benefits are often compromised by patients' low adherence. Nonadherence to bisphosphonate therapy negatively impacts outcomes such as fracture rate; fractures are in turn associated with decreased quality of life. The most common reason cited by patients for their nonadherence is that the strict dosing instructions for bisphosphonates are difficult to follow. One aspect of bisphosphonate administration that can be changed is dosing frequency and several studies have evaluated patient preferences for different dosing schedules. Studies have shown a preference for a weekly bisphosphonate regimen versus daily dosing and it has been demonstrated that this preference for reduced dosing frequency impacts on adherence. Ibandronate is the first nitrogen-containing oral bisphosphonate for osteoporosis that can be administered in a monthly regimen and two robust clinical studies demonstrated a strong patient preference for this monthly regimen versus a weekly regimen. It is important that physicians consider patient preference when prescribing treatment for osteoporosis to ensure that the disease is effectively managed for the long-term benefit of the patient. [less ▲]

Detailed reference viewed: 27 (2 ULg)
Full Text
Peer Reviewed
See detailPhysiopathologie de l'hyperglycemie post-prandiale
Scheen, A. J.; Paquot, Nicolas ULg

in Journées Annuelles de Diabetologie de l'Hôtel-Dieu (2006)

Detailed reference viewed: 47 (0 ULg)
Full Text
See detailLe travail de modélisation aux prises avec l'exigence démocratique : le projet PEPAM et les conditions d'un apprentissage croisé entre experts et citoyens
Melard, François ULg

in Sciences et expertises en société - Actes du colloque "Les savoirs au défi de la Paix et de la Citoyennté (2006)

La construction d’un outil de gestion implique tout à la fois des connaissances, des anticipations, des choix sur les pratiques qu’elles visent à gérer. Dans le cas de la gestion des risques liés à ... [more ▼]

La construction d’un outil de gestion implique tout à la fois des connaissances, des anticipations, des choix sur les pratiques qu’elles visent à gérer. Dans le cas de la gestion des risques liés à l’usage des pesticides en Belgique, un « outil scientifique » (sous la forme d’un modèle et de ses indicateurs) est mobilisé et transformé afin de participer à une politique publique de diminution des risques. Les experts et modélisateurs d’un institut de recherche publique ont proposé - avec l’aide de chercheurs en sciences humaines - d’ouvrir à la discussion au sein d’un panel de citoyens la pertinence de la construction et de l’usage de leur modèle. Par cette situation expérimentale, plusieurs intérêts peuvent être poursuivis : évaluer la capacité de citoyens à apprendre et à s’approprier une thématique complexe et technique et à faire des propositions visant à « améliorer », voire à « dépasser » le fonctionnement dudit modèle ; mais aussi et surtout à étudier les conditions par lesquelles les experts eux-mêmes peuvent apprendre des remarques et suggestions de citoyens concernant leur pratique. C’est de ce double enjeu qu’est né le projet PEPAM. Cette présente communication vise à rendre compte de ses principaux enseignements lorsqu’ils touchent la question de la construction participative et démocratique d’outils scientifiques et de gestion dans le domaine environnemental. [less ▲]

Detailed reference viewed: 65 (11 ULg)
Full Text
Peer Reviewed
See detailBabels du 21e siècle. Quelques notes sur la traduction française d’un poème de Leonard Schwartz
Pagnoulle, Christine ULg

in Palimpsestes (2006), HS

How a French translation can convey the puns and sound effects that are integral in this grim epic on reprisals, this sensual ode to love.

Detailed reference viewed: 83 (15 ULg)
Full Text
See detailAnalytic properties of unitarization schemes
Selyugin, Oleg Viktorovich; Cudell, Jean-René ULg

in Czechoslovak Journal of Physics (2006)

The analytic properties of the elastic hadron scattering amplitude are examined in the impact parameter representation at high energies. Different unitarization procedures and the corresponding non-linear ... [more ▼]

The analytic properties of the elastic hadron scattering amplitude are examined in the impact parameter representation at high energies. Different unitarization procedures and the corresponding non-linear equations are presented. Several unitarisation schemes are presented. They lead to almost identical results at the LHC. [less ▲]

Detailed reference viewed: 555 (70 ULg)
Full Text
Peer Reviewed
See detailAn exploration of the relationships between short-term memory for serial order information, item information and new word learning in adults
Majerus, Steve ULg; Poncelet, Martine ULg; Elsen, B. et al

in European Journal of Cognitive Psychology (2006), 18(6), 848-873

Detailed reference viewed: 54 (12 ULg)
Full Text
Peer Reviewed
See detailAnalysis of kinetic energy release distributions by the maximum entropy method.
Leyh, Bernard ULg; Gridelet, E.; Locht, Robert ULg et al

in International Journal of Mass Spectrometry (2006), 249-250

Energy is not always fully randomized in an activated molecule because of the existence of dynamical constraints. An analysis of kinetic energy release distributions (KERDs) of dissociation fragments by ... [more ▼]

Energy is not always fully randomized in an activated molecule because of the existence of dynamical constraints. An analysis of kinetic energy release distributions (KERDs) of dissociation fragments by the maximum entropy method (MEM) provides information on the efficiency of the energy flow between the reaction coordinate and the remaining degrees of freedom during the fragmentation. For example, for barrierless cleavages, large translational energy releases are disfavoured while energy channeling into the rotational and vibrational degrees of freedom of the pair of fragments is increased with respect to a purely statistical partitioning. Hydrogen atom loss reactions provide an exception to this propensity rule. An ergodicity index, F, can be derived. It represents an upper bound to the ratio between two volumes of phase space: that effectively explored during the reaction and that in principle available at the internal energy E. The function F(E) has been found to initially decrease and to level off at high internal energies. For an atom loss reaction, the orbiting transition state version of phase space theory (OTST) is especially valid for low internal energies, low total angular momentum, large reduced mass of the pair of fragments, large rotational constant of the fragment ion, and large polarizability of the released atom. For barrierless dissociations, the major constraint that results from conservation of angular momentum is a propensity to confine the translational motion to a two-dimensional space. For high rotational quantum numbers, the influence of conservation of angular momentum cannot be separated from effects resulting from the curvature of the reaction path. The nonlinear relationship between the average translational energy <epsilon > and the internal energy E is determined by the density of vibrational-rotational states of the pair of fragments and also by non-statistical effects related to the incompleteness of phase space exploration. The MEM analysis of experimental KERDs suggests that many simple reactions can be described by the reaction path Hamiltonian (RPH) model and provides a criterion for the validity of this method. Chemically oriented problems can also be solved by this approach. A few examples are discussed: determination of branching ratios between competitive channels, reactions involving a reverse activation barrier, nonadiabatic mechanisms, and isolated state decay. (c) 2005 Elsevier B.V. All rights reserved. [less ▲]

Detailed reference viewed: 55 (6 ULg)
Full Text
Peer Reviewed
See detailAnalytical validation of the new plasma calibrated Accu-Chek (R) Test Strips (Roche Diagnostics)
Meex, Cécile ULg; Poncin, José ULg; Chapelle, Jean-Paul ULg et al

in Clinical Chemistry & Laboratory Medicine (2006), 44(11), 1376-1378

Background: The Accu-Chek Inform glucose monitor is a point-of-care system for testing blood glucose. New test strips, calibrated to deliver glucose plasma-like values, were launched on the market in May ... [more ▼]

Background: The Accu-Chek Inform glucose monitor is a point-of-care system for testing blood glucose. New test strips, calibrated to deliver glucose plasma-like values, were launched on the market in May 2005. The aim of our study was to perform analytical validation of these new strips. Methods: We compared the new plasma strips with whole blood strips; results for the plasma strips with plasma values obtained using a clinical analyzer and with whole blood values given by the glucose electrode of a blood gas analyzer; and the influence of the type of blood (capillary or venous) on the results obtained by the glucose monitor with the plasma calibrated strips. Results: Plasma strips give on average 7% higher results than the previous whole blood strips. However, the results given by the plasma strips on capillary whole blood, even if well correlated, are not completely comparable with those given by an analyzer for venous plasma. Nevertheless, these plasma strips and the glucose electrode of a blood gas analyzer give comparable results. Conclusions: Accu-Chek Inform plasma strips are a good method for monitoring of blood glucose values in patients with diabetes. [less ▲]

Detailed reference viewed: 82 (2 ULg)
Full Text
Peer Reviewed
See detailAttitude à adopter devant une pression artérielle chroniquement basse
Grosch, Stéphanie ULg; Maillet, J.; Krzesinski, Jean-Marie ULg

in Revue Médicale de Liège (2006), 61(5-6, May-Jun), 374-9

Chronic arterial hypotension has been poorly studied. Its mechanisms are not well understood; its treatment (if needed) is disappointing, without any demonstrated improvement of symptoms or prognosis ... [more ▼]

Chronic arterial hypotension has been poorly studied. Its mechanisms are not well understood; its treatment (if needed) is disappointing, without any demonstrated improvement of symptoms or prognosis. Thus, a complete medical examination is needed to exclude any organic cause. If none is found, it is important to reassure the patient and to convince him not to use expensive drugs potentially generative of side effects. [less ▲]

Detailed reference viewed: 115 (2 ULg)
Full Text
Peer Reviewed
See detailA-t-on evalue l'interet du SAMU?
Bodson, Lucien ULg; Grenade, J.; Micheels, Jean ULg et al

in Revue Médicale de Liège (2006), 61(5-6, May-Jun), 494-9

Recent international guidelines about emergency situations (ILCOR / ERC) pointed to the need of the whole "chain of survival". ALS, Advanced Life Support (the last and "medical" part of the chain ) is ... [more ▼]

Recent international guidelines about emergency situations (ILCOR / ERC) pointed to the need of the whole "chain of survival". ALS, Advanced Life Support (the last and "medical" part of the chain ) is important and influences survival rate. If no doubt exists about "what" and "when" to do in such situations, there is no consensus in industrialized countries about "who" should be in charge of such out-of-hospital acute diagnosis and treatment: emergency physicians, emergency nurses, emergency medical technicians (EMT), other "new" professionals ? ... A description of the MICU system in Belgium is given. [less ▲]

Detailed reference viewed: 63 (3 ULg)
Full Text
Peer Reviewed
See detailChange blindness to gradual changes in facial expressions
David, E.; Laloyaux, Cédric ULg; Devue, Christel ULg et al

in Psychologica Belgica (2006), 46(4), 253-268

Change blindness—our inability to detect changes in a stimulus—occurs even when the change takes place gradually, without disruption (Simons et al., 2000). Such gradual changes are more difficult to ... [more ▼]

Change blindness—our inability to detect changes in a stimulus—occurs even when the change takes place gradually, without disruption (Simons et al., 2000). Such gradual changes are more difficult to detect than changes that involve a disruption. In this experiment, we extend previous findings to the domain of facial expressions of emotions occurring in the context of a realistic scene. Even with changes occurring in central, highly relevant stimuli such as faces, gradual changes still produced high levels of change blindness: Detection rates were three times lower for gradual changes than for displays involving disruption, with only 15% of the observers perceiving the gradual change within a single trial. However, despite this high rate of change blindness, changes on faces were significantly better detected than color changes occurring on non facial objects in the same scene. [less ▲]

Detailed reference viewed: 55 (3 ULg)