References of "2011"
     in
Bookmark and Share    
Full Text
See detailModal Analysis of Nonlinear Vibrating Systems: Recent Progress and Challenges, KEYNOTE LECTURE
Kerschen, Gaëtan ULiege

in Proceeedings of the Eighth European Conference on Structural Dynamics (2011)

Theoretical and experimental modal analysis, i.e., the computation of vibration modes from a mathematical model and from experimental data, respectively, is quite sophisticated and advanced in linear ... [more ▼]

Theoretical and experimental modal analysis, i.e., the computation of vibration modes from a mathematical model and from experimental data, respectively, is quite sophisticated and advanced in linear structural dynamics. However, nonlinearity is a frequent occurrence in real-world engineering structures, and the existing linear methodologies can no longer be used in this context. Therefore, the development of a nonlinear analog of modal analysis would be a timely contribution. Because nonlinear normal modes (NNMs) provide solid mathematical foundations for a rigorous analysis of nonlinear dynamical behaviors, a framework which includes both their computation from finite element models and their identification from experimental data is proposed in this paper. In view of the still limited use of NNMs in structural dynamics, special attention is devoted to develop tools that have the potential to deal with large-scale structures. [less ▲]

Detailed reference viewed: 24 (0 ULiège)
Full Text
See detailDroit romain: Petits lexiques et documents de travail
Gerkens, Jean-François ULiege

Learning material (2011)

Detailed reference viewed: 104 (16 ULiège)
Full Text
Peer Reviewed
See detailGeneration of all symmetric as well as all total angular momentum eigenstates in photonic or matter qubits
von Zanthier, J.; Maser, A.; Wiegner, R. et al

Conference (2011)

Detailed reference viewed: 26 (1 ULiège)
Full Text
Peer Reviewed
See detailSexual differentiation of sexual behavior and its orientation.
Roselli, Charles; Balthazart, Jacques ULiege

in Frontiers in Neuroendocrinology (2011), 32(2), 109

Detailed reference viewed: 59 (10 ULiège)
Full Text
Peer Reviewed
See detailU-Shaped Switches for Optical Information Processing at the Nanoscale
Valev, Ventsislav K; Silhanek, Alejandro ULiege; De Clercq, Ben et al

in Small : Nano Micro (2011), 7(18), 2573-2576

Detailed reference viewed: 48 (0 ULiège)
Full Text
Peer Reviewed
See detailPeripheral nerve stimulation in chronic cluster headache.
MAGIS, Delphine ULiege; Schoenen, Jean ULiege

in Progress in Neurological Surgery (2011), 24

Cluster headache is well known as one of the most painful primary neurovascular headache. Since 1% of chronic cluster headache patients become refractory to all existing pharmacological treatments ... [more ▼]

Cluster headache is well known as one of the most painful primary neurovascular headache. Since 1% of chronic cluster headache patients become refractory to all existing pharmacological treatments, various invasive and sometimes mutilating procedures have been tempted in the last decades. Recently, neurostimulation methods have raised new hope for drug-resistant chronic cluster headache patients. The main focus of this chapter is on stimulation of the great occipital nerve, which has been the best evaluated peripheral nerve stimulation technique in drug-resistant chronic cluster headache, providing the most convincing results so far. Other peripheral nerve stimulation approaches used for this indication are also reviewed in detail. Although available studies are limited to a relatively small number of patients and placebo-controlled trials are lacking, existent clinical data suggest that occipital nerve stimulation should nonetheless be recommended for intractable chronic cluster headache patients before more invasive deep brain stimulation surgery. More studies are needed to evaluate the usefulness of supraorbital nerve stimulation and of vagus nerve stimulation in management of cluster headaches. [less ▲]

Detailed reference viewed: 16 (1 ULiège)
Full Text
Peer Reviewed
See detailBifidobacterium pseudolongum are efficient indicators of animal fecal contamination in raw milk cheese industry
Delcenserie, Véronique ULiege; Gavini, Françoise; China, Bernard et al

in BMC Microbiology (2011), 11(178),

Background: The contamination of raw milk cheeses (St-Marcellin and Brie) from two plants in France was studied at several steps of production (raw milk, after addition of rennet - St-Marcellin - or after ... [more ▼]

Background: The contamination of raw milk cheeses (St-Marcellin and Brie) from two plants in France was studied at several steps of production (raw milk, after addition of rennet - St-Marcellin - or after second maturation - Brie -, after removal from the mold and during ripening) using bifidobacteria as indicators of fecal contamination. Results: Bifidobacterium semi-quantitative counts were compared using PCR-RFLP and real-time PCR. B. pseudolongum were detected in 77% (PCR-RFLP; 1.75 to 2.29 log cfu ml-1) at the different production steps) and 68% (real-time PCR; 2.19 to 2.73 log cfu ml-1) of St-Marcellin samples and in 87% (PCR-RFLP; 1.17 to 2.40 log cfu ml-1) of Brie cheeses samples. Mean counts of B. pseudolongum remained stable along both processes. Two other populations of bifidobacteria were detected during the ripening stage of St-Marcellin, respectively in 61% and 18% of the samples (PCR-RFLP). The presence of these populations explains the increase in total bifidobacteria observed during ripening. Further characterization of these populations is currently under process. Forty-eight percents (St-Marcellin) and 70 % (Brie) of the samples were B. pseudolongum positive / E. coli negative while only 10 % (St-Marcellin) and 3 % (Brie) were B. pseudolongum negative / E. coli positive. Conclusions: The increase of total bifidobacteria during ripening in Marcellin’s process does not allow their use as fecal indicator. The presence of B. pseudolongum along the processes defined a contamination from animal origin since this species is predominant in cow dung and has never been isolated in human feces. B. pseudolongum was more sensitive as an indicator than E. coli along the two different cheese processes. B. pseudolongum should be used as fecal indicator rather than E. coli to assess the quality of raw milk and raw milk cheeses. Results: Bifidobacterium semi-quantitative counts were compared using PCR-RFLP and real-time PCR. Bif. pseudolongum were detected in 77% (PCR-RFLP; 1.75 to 2.29 log cfu ml-1) at the different production steps) and 68% (real-time PCR; 2.19 to 2.73 log cfu ml-1) of St-Marcellin samples and in 87% (PCR-RFLP; 1.17 to 2. 40 log cfu ml-1) of Brie cheeses samples. Mean counts of Bif. pseudolongum remained stable along both processes. Two other populations of bifidobacteria were detected during the ripening stage of St-Marcellin, respectively in 61% and 18% of the samples (PCR-RFLP). The presence of these populations explains the increase in total bifidobacteria observed during ripening. Further identification of these species is currently under process. Forty-eight percents (St-Marcellin) and 70 % (Brie) of the samples were Bif. pseudolongum positive / E. coli negative while only 10 % (St-Marcellin) and 3 % (Brie) were Bif. pseudolongum negative / E. coli positive. Conclusions: The increase of total bifidobacteria during ripening in Marcellin’s process does not allow their use as fecal indicator. The presence of Bif. pseudolongum along the processes defined a contamination from animal origin since this species is predominant in cow dung and has never been isolated in human feces. Bif. pseudolongum was more sensitive as an indicator than E. coli along the two different cheese processes. Bif. pseudolongum should be used as fecal indicator rather than E. coli to assess the quality of raw milk and raw milk cheeses. [less ▲]

Detailed reference viewed: 75 (21 ULiège)
Full Text
Peer Reviewed
See detailDu crayon au stylo numérique : influences des IHM à stylo et des interprétations numériques sur l'activité graphique en tâches de conception.
Safin, Stéphane ULiege; Juchmes, Roland ULiege; Leclercq, Pierre ULiege

in Journal d’Interaction Personne-Système (2011), 2(1),

Our research is embedded in the framework of the development of free-hand drawing-based computer assisted architectural design environment. In this paper, we study the activity of drawings duplication ... [more ▼]

Our research is embedded in the framework of the development of free-hand drawing-based computer assisted architectural design environment. In this paper, we study the activity of drawings duplication, observed during the paper changes in the phase of preliminary sketching. We aim at identifying the impacts of two digital sketches environments, with or without drawings interpretation, on this activity and on the graphical productions. We observe six activities, two with paper-pencil and four distributed on our two prototypes, and draw some operational conclusions for the development of software designed to support the architectural sketches in the preliminary design stage. [less ▲]

Detailed reference viewed: 142 (13 ULiège)
Full Text
See detailLa retorica dissimulata: Le strategie iterative di Raffaello Baldini
Benzoni, Pietro ULiege

in Andreose, Alvise; Peron, Gianfelice (Eds.) Anaphora. Forme della ripetizione (2011)

Detailed reference viewed: 36 (3 ULiège)
Full Text
Peer Reviewed
See detailTuning methodology of nonlinear vibration absorbers coupled to nonlinear mechanical systems
Viguié, R.; Kerschen, Gaëtan ULiege

in Proceedings of the ASME International Design Engineering Technical Conferences (2011)

A large body of literature exists regarding linear and nonlinear dynamic absorbers, but the vast majority of it deals with linear primary structures. However, nonlinearity is a frequent occurrence in ... [more ▼]

A large body of literature exists regarding linear and nonlinear dynamic absorbers, but the vast majority of it deals with linear primary structures. However, nonlinearity is a frequent occurrence in engineering applications. Therefore, the present paper focuses on the mitigation of vibrations of nonlinear primary systems using nonlinear dynamic absorbers. Because most existing contributions about their design rely on extensive parametric studies, which are computationally demanding, or on analytic methods, which may be limited to small-amplitude motions, this study proposes a tuning procedure which is computationally tractable and can treat strongly nonlinear regimes of motion. The proposed methodology relies on a frequency-energy based approach followed by bifurcation analysis. The results are illustrated using a one-degree-of-freedom primary system, which can, for instance, represent the vibrations of a specific mode of a multi-degree-of-freedom structure. [less ▲]

Detailed reference viewed: 19 (1 ULiège)
Full Text
Peer Reviewed
See detailDe l'art d'accommoder les restes: aux limites de l'exposition de l'art contemporain?
Eloy, Céline ULiege

in Vie des Musées (La) (2011), 23

Detailed reference viewed: 67 (5 ULiège)
Full Text
Peer Reviewed
See detailA phase 3 study of the efficacy and safety of Denosumab in men with low bone mineral density : design of the ADAMO
Orwoll, E.; Stubbe Teglbjaerg, Ch; Langdahl, B. et al

in Journal of Bone and Mineral Research (2011), 26(S1), 511

Detailed reference viewed: 55 (2 ULiège)
Full Text
Peer Reviewed
See detailIMA Commission on New Minerals, Nomenclature and Classification (CNMNC), Newsletter 7
Williams, Pete; Hatert, Frédéric ULiege; Pasero, Marco et al

in Mineralogical Magazine (2011), 75(1), 27-31

Detailed reference viewed: 7 (0 ULiège)
Full Text
Peer Reviewed
See detailSustainable and Innovative Solutions for Sewage Sludge Management
Spinosa, Ludovico; Ayol, Azize; Baudez, Jean-Christophe et al

in Water (2011), 3(2), 702-717

Detailed reference viewed: 46 (9 ULiège)
Full Text
Peer Reviewed
See detailPotential contribution of prenatal estrogens to the sexual differentiation of mate preferences in mice.
Brock, Olivier; Bakker, Julie ULiege

in Hormones and Behavior (2011), 59(1), 83-9

The neural mechanisms controlling sexual behavior are sexually differentiated by perinatal actions of gonadal hormones. We recently observed using female mice deficient in alpha-fetoprotein (AFP-KO) and ... [more ▼]

The neural mechanisms controlling sexual behavior are sexually differentiated by perinatal actions of gonadal hormones. We recently observed using female mice deficient in alpha-fetoprotein (AFP-KO) and which lack the protective actions of AFP against maternal estrogens, that exposure to prenatal estrogens completely defeminized their potential to show lordosis behavior in adulthood. Therefore, we determined here whether mate preferences were also affected in female AFP-KO mice. We observed a robust preference for an estrous female over an intact male in female AFP-KO mice, which were ovariectomized in adulthood and subsequently treated with estradiol and progesterone, whereas similarly treated WT females preferred the intact male over the estrous female. Gonadally intact WT males preferred the estrous female over the male, but only when visual cues were blocked by placing stimulus animals behind opaque partitions. Furthermore, when given the choice between an intact male and a castrated male, WT females preferred the intact male, whereas AFP-KO females showed no preference. Finally when given the choice between an estrous female and an ovariectomized female, WT males preferred the estrous female whereas AFP-KO females preferred the ovariectomized female or showed no preference depending on whether they could see the stimulus animals or not. Taken together, when AFP-KO females are tested under estrous conditions, they do not show any male-directed preferences, indicating a reduced sexual motivation to seek out the male in these females. However, they do not completely resemble males in their mate preferences suggesting that the male-typical pattern of mate preferences is not solely organized by prenatal estrogens. [less ▲]

Detailed reference viewed: 34 (5 ULiège)
Full Text
Peer Reviewed
See detailThe development of female sexual behavior requires prepubertal estradiol.
Brock, Olivier; Baum, Michael J; Bakker, Julie ULiege

in Journal of Neuroscience (2011), 31(15), 5574-8

The classic view of brain and behavioral sexual differentiation holds that the neural mechanisms controlling sexual behavior in female rodents develop in the absence of ovarian sex hormone actions ... [more ▼]

The classic view of brain and behavioral sexual differentiation holds that the neural mechanisms controlling sexual behavior in female rodents develop in the absence of ovarian sex hormone actions. However, in a previous study, female aromatase knock-out (ArKO) mice, which cannot convert testosterone to estradiol, showed deficient male-oriented partner preference and lordosis behaviors in response to adult ovarian hormones, raising the possibility that estradiol may contribute to the development of these female sexual behaviors. In the present experiments, administering estradiol prepubertally [between postnatal day 15 (P15) and P25] significantly enhanced the ability of ArKO female mice to display lordosis behavior in response to ovarian hormones administered later in adulthood, whereas treatment with estradiol over an earlier postnatal period (P5-P15) had no such effect. Treatment of ArKO females with estradiol between P15 and P25 also rescued their later preference to approach distal cues from an intact male over an estrous female. ArKO females also displayed significantly less female-directed (male-typical) mounting behavior than wild-type control females when treated with testosterone in adulthood. Prepubertal estradiol treatment failed to reverse this deficit in ArKO females, whereas earlier postnatal estradiol augmented later mounting in both genotypes. Our results provide new evidence for an organizing role of prepubertal estradiol in the development of neural mechanisms that control female-typical sexual behavior. [less ▲]

Detailed reference viewed: 34 (5 ULiège)
Full Text
Peer Reviewed
See detailSex differences in adolescent depression: do sex hormones determine vulnerability?
Naninck, E. F. G.; Lucassen, P. J.; Bakker, Julie ULiege

in Journal of Neuroendocrinology (2011), 23(5), 383-92

Depression is one of the most common, costly and severe psychopathologies worldwide. Its incidence, however, differs significantly between the sexes, and depression rates in women are twice those of men ... [more ▼]

Depression is one of the most common, costly and severe psychopathologies worldwide. Its incidence, however, differs significantly between the sexes, and depression rates in women are twice those of men. Interestingly, this sex difference emerges during adolescence. Although the adolescent period is characterised by major physical and behavioural transformations, it is unclear why the incidence of depression increases so dramatically in girls during this otherwise generally healthy developmental period. Although psychological and environmental factors are also involved, we discuss the neuroendocrinological factors determining adolescent vulnerability to depression. In particular, we address the role of sex steroids in mood regulation, hypothalamic-pituitary-adrenal axis maturation and sexual differentiation of the brain, with a focus on hippocampal plasticity. [less ▲]

Detailed reference viewed: 158 (7 ULiège)
Full Text
Peer Reviewed
See detailPostnatal and adult exposure to estradiol differentially influences adult neurogenesis in the main and accessory olfactory bulb of female mice.
Veyrac, Alexandra; Bakker, Julie ULiege

in FASEB Journal (2011), 25(3), 1048-57

Neurons incorporated into the adult main olfactory bulb (MOB) and accessory olfactory bulb (AOB) derive from the subventricular zone (SVZ). Despite some recent studies on the role of olfactory ... [more ▼]

Neurons incorporated into the adult main olfactory bulb (MOB) and accessory olfactory bulb (AOB) derive from the subventricular zone (SVZ). Despite some recent studies on the role of olfactory neurogenesis in sociosexual behaviors mediated by hormones, data on the implication of estrogens are still lacking. Taking advantage of female aromatase-knockout (ArKO) mice, which are unable to produce estradiol across their life span, we investigated the role of estradiol exposure during early postnatal and adult periods on adult neurogenesis in the MOB and AOB. We found that proliferation of progenitor cells in the adult female SVZ was not influenced by estradiol. However, whereas adult exposure to estradiol influences the turnover of MOB newborn neurons, the survival of those in the AOB depends on exposure to estradiol during the early postnatal period. Finally, based on their expression of Zif268, we showed that newborn neurons in the MOB responded to sociosexual odors, albeit to a lesser extent in ArKO females, suggesting a contribution of estradiol during the early postnatal period to this response. Together, these results suggest that the survival and functional integration of newborn neurons in the adult female MOB and AOB are differentially influenced by estrogens from the early postnatal period to adulthood. [less ▲]

Detailed reference viewed: 18 (4 ULiège)
Full Text
Peer Reviewed
See detailFarmer perceptions and pathological constraints in helmeted guinea fowl farming in the Borgou department in North-East Benin
Boko, C. K.; Kpodekon, M. T.; Farougou, S. et al

in African Journal of Agricultural Research (2011), 6

Detailed reference viewed: 25 (1 ULiège)