Browsing
     by title


0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

or enter first few letters:   
OK
Full Text
Peer Reviewed
See detailLinear and nonlinear optical properties of functionalized CdSe quantum dots prepared by plasma sputtering and wet chemistry
Humbert, Christophe; Dahi, Abdellatif; Dalstein, Laetitia et al

in Journal of Colloid & Interface Science (2015), 445

Detailed reference viewed: 40 (6 ULiège)
Full Text
See detailLinear and nonlinear piezoelectric shunting strategies for vibration mitigation
Soltani, Payam ULiege; Tondreau, Gilles; Deraemaeker, Arnaud et al

Scientific conference (2014, September 01)

Detailed reference viewed: 5 (0 ULiège)
Full Text
Peer Reviewed
See detailLinear and nonlinear Rayleigh-Bénard-Marangoni instability with surface deformations
Regnier, Vincent; Dauby, Pierre ULiege; Lebon, Georgy ULiege

in Physics of Fluids (2000), 12

Thermoconvective instabilities in a bilayer liquid-gas system with a deformed interface are investigated. In the first part of the work which is devoted to a linear approach, emphasis is put on the role ... [more ▼]

Thermoconvective instabilities in a bilayer liquid-gas system with a deformed interface are investigated. In the first part of the work which is devoted to a linear approach, emphasis is put on the role of the upper gas layer on the instability phenomenon. The condition to be satisfied by the gas to remain purely conductive is established. The so-called Oberbeck-Boussinesq approximation is discussed and its range of validity is carefully defined. Instead of the classical Rayleigh, Marangoni, crispation, and Galileo numbers, new dimensionless groups are introduced. A critical comparison with several previous works is made. The nonlinear analysis consists in studying the different convective patterns which can appear above the threshold. Particular attention is devoted to the shape of the interface and the so-called ``hybrid'' relief. The amplitude of the deformation is also determined and comparison with experimental data is discussed. [less ▲]

Detailed reference viewed: 34 (1 ULiège)
Peer Reviewed
See detailLinear and nonlinear thermal instability of a rotating saturated porous medium heated from below
Desaive, Thomas ULiege; Hennenberg, M.; Lebon, Georgy ULiege

in 1st international conference on applications of porous media (2002)

Detailed reference viewed: 10 (0 ULiège)
Full Text
Peer Reviewed
See detailLinear and propeller-like fluoro-isoindigo based donor–acceptor small molecules for organic solar cells
Ouhib, Farid ULiege; Tomassetti, Mirco ULiege; Dierckx, Wauter et al

in Organic Electronics (2015), 20

Two donor–acceptor type fluoro-isoindigo based small molecule semiconductors are syn- thesized and their optical, electrochemical, thermal, and charge transport properties are investigated. The two ... [more ▼]

Two donor–acceptor type fluoro-isoindigo based small molecule semiconductors are syn- thesized and their optical, electrochemical, thermal, and charge transport properties are investigated. The two molecular chromophores differ by their architecture, linear (M1) vs propeller-like (M2). Both molecules present a broad absorption in the visible range and a low optical HOMO–LUMO gap (?1.6 eV). AFM images of solution-processed thin films show that the trigonal molecule M2 forms highly oriented fibrils after a few seconds of solvent vapor annealing. The materials are evaluated as electron donor components in bulk heterojunction organic solar cells using PC61BM as the electron acceptor. The devices based on the propeller-like molecule M2 exhibit a high open-circuit voltage (around 1.0 V) and a power conversion efficiency of 2.23%. [less ▲]

Detailed reference viewed: 78 (6 ULiège)
Full Text
Peer Reviewed
See detailLinear Benard-Marangoni instability in rigid circular containers
Dauby, Pierre ULiege; Lebon, Georgy ULiege; Bouhy, E.

in Physical Review. E : Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics (1997), 56(1), 520-530

Detailed reference viewed: 15 (5 ULiège)
Peer Reviewed
See detailLinear coupling between the Rayleigh-Bénard instability and rotation for a ferrofluid in a normal magnetic fluid
Hennenberg, M.; Weyssow, B.; Desaive, Thomas ULiege et al

in The first international conference on applications of porous media (2002)

Detailed reference viewed: 13 (0 ULiège)
Full Text
Peer Reviewed
See detailLinear electro-optic effect in multiferroic BiFeO3 thin films
Sando, D.; Hermet, Patrick ULiege; Allibe, J. et al

in Physical Review B (2014), 89

Multiferroics are materials with coexisting magnetic and ferroelectric orders, which show potential for electrically controlled spintronic devices. A common application of ferroelectrics is in electro ... [more ▼]

Multiferroics are materials with coexisting magnetic and ferroelectric orders, which show potential for electrically controlled spintronic devices. A common application of ferroelectrics is in electro-optical modulators exploiting their electric-field-dependent optical indices. The coupling of optical and magnetic degrees of freedom is attractive for designing multifunctional devices, but to date the electro-optical response of multiferroics has hardly been explored. Here we report a joint experimental and theoretical study of this effect in multiferroic BiFeO3 thin films. We confirm the large birefringence present in single crystals and determine the electro-optic coefficients r13 and r33. We present approaches to increase the obtained coefficients, for instance, by using tetragonal-like BiFeO3, and expand the potential of multiferroics to optical applications. [less ▲]

Detailed reference viewed: 25 (1 ULiège)
Peer Reviewed
See detailLinear foreign bodies in cats
Hamaide, Annick ULiege

in Proceedings du 15th congrès FECAVA (2009, November)

Detailed reference viewed: 41 (9 ULiège)
Full Text
See detailLinear formulation of identifying cdes in graphs
Vandomme, Elise ULiege; Gravier, Sylvain; Parreau, Aline ULiege

Poster (2013, September 09)

Identifying codes were introduced by Karpovsky, Chakrabarty and Levitin in 1998 and can be applied to locate fire in a building using sensors. Buildings are modelled by graphs with rooms as vertices. The ... [more ▼]

Identifying codes were introduced by Karpovsky, Chakrabarty and Levitin in 1998 and can be applied to locate fire in a building using sensors. Buildings are modelled by graphs with rooms as vertices. The placement of sensors in the rooms corresponds to choosing a subset of vertices. Finding a sensor-placement such that the location of a fire in one room can be precisely determined is equivalent to constructing an identifying code in the graph. These are dominating sets of vertices for which the closed neighbourhood of each vertex (i.e., the vertex and its neighbours) has a unique intersection with the set. The problem of finding an identifying code has been widely studied. Yet its formulation as an integer linear problem hasn't been much considered. Let G be a graph with vertex set V, to an identifying code $C\subseteq V$ of $G$ correspond weights x_u (x_u is 1 if u belongs to C, otherwise x_u is 0) satisfying the following : for all vertices u,v * the sum of the x_w for w in the closed neighbourhood of u is at least 1 * the sum of the x_w for w in the symmetric difference of the closed neighbourhoods of u and v is at least 1. Of course, it is interesting to find an identifying code with the smallest possible cardinality. But in general this is a NP-hard problem. A way to obtain bounds on the minimal cardinality is to consider the associated linear problem where the weights x_u are fractional. In the case of vertex-transitive graphs, the minimal cardinality for the fractional case can only take two values which depend on the number of vertices, the degree of the graph and the smallest symmetric difference between any two closed neighbourhoods. We show that for an infinite family of graphs the bound is tight and for another another the bound is far too be reached. [less ▲]

Detailed reference viewed: 51 (19 ULiège)
Full Text
Peer Reviewed
See detailLinear growth and final height after treatment for Cushing's disease in childhood.
LEBRETHON, Marie-Christine ULiege; Grossman, A. B.; Afshar, F. et al

in The Journal of clinical endocrinology and metabolism (2000), 85(9), 3262-5

Cushing's disease is associated with growth failure in childhood and adolescence. Growth and final height were analyzed in 10 patients who were cured or in remission after treatment of Cushing's disease ... [more ▼]

Cushing's disease is associated with growth failure in childhood and adolescence. Growth and final height were analyzed in 10 patients who were cured or in remission after treatment of Cushing's disease. Seven males and 3 females, aged 6.8-17.6 yr (bone age, 3.3-15.4 yr), had transsphenoidal surgery, which was combined with pituitary irradiation (4,500 cGy in 25 fractions) in 5 patients. At presentation, 5 patients were prepubertal (males), and 5 were pubertal (2 males and 3 females). The mean height SD score was -2.15 +/-1.26 (range, -0.21 to -4.32) compared with mean target height SD score of -0.43 +/- 0.58. Height velocity in 6 patients was subnormal (0.9-3.8 cm/yr). After treatment, short-term height velocity, over a mean interval of 0.57 yr, in 8 patients not receiving human GH (hGH) therapy, was variable (range, 0.8-7.6 cm/yr). GH stimulation tests (insulin tolerance test/glucagon) in 9 subjects showed peak GH levels of 0.5-20.9 mU/L. Eight were treated with hGH (14 IU/m2 wk), combined in 2 girls and 1 boy with a GnRH analog. After 1 yr of hGH, the mean height SD score had increased from -2.45 +/- 1.0 at initiation of hGH to -2.07 +/- 1.2 (P = 0.01). GH therapy was continued until final height or latest assessment. The mean final height SD score (n = 6) was - 1.24 +/- 1.38, and at the latest assessment the mean height SD score (n = 4) was - 1.52 +/- 1.33. Combining these 2 groups, the mean height so score was -1.36 +/- 1.29. The difference between final or latest height SD score and target height SD score was 0.93 +/- 1.13, i.e. less (P = 0.005) than the difference between height and target height SD score of 1.72 +/- 1.26 at presentation. In conclusion, catch-up and favorable long-term growth was seen after treatment for Cushing's disease. Posttreatment GH deficiency was frequent, and early hGH replacement may have contributed to the encouraging outcome. [less ▲]

Detailed reference viewed: 9 (0 ULiège)
Full Text
Peer Reviewed
See detailLinear magnetoelectric effect by orbital magnetism
Scaramucci, A.; Bousquet, Eric ULiege; Fechner, M. et al

in Physical Review Letters (2012), 109(19),

We use symmetry analysis and first-principles calculations to show that the linear magnetoelectric effect can originate from the response of orbital magnetic moments to the polar distortions induced by an ... [more ▼]

We use symmetry analysis and first-principles calculations to show that the linear magnetoelectric effect can originate from the response of orbital magnetic moments to the polar distortions induced by an applied electric field. Using LiFePO 4 as a model compound we show that spin-orbit coupling partially lifts the quenching of the 3d orbitals and causes small orbital magnetic moments (μ (L)≈0.3μ B) parallel to the spins of the Fe2 + ions. An applied electric field E modifies the size of these orbital magnetic moments inducing a net magnetization linear in E. © 2012 American Physical Society. [less ▲]

Detailed reference viewed: 44 (4 ULiège)
Full Text
Peer Reviewed
See detailLinear regression under fixed-rank constraints: a Riemannian approach
Meyer, Gilles ULiege; Bonnabel, Silvère; Sepulchre, Rodolphe ULiege

in Proceedings of the 28th International Conference on Machine Learning (2011)

In this paper, we tackle the problem of learning a linear regression model whose parameter is a fixed-rank matrix. We study the Riemannian manifold geometry of the set of fixed-rank matrices and develop ... [more ▼]

In this paper, we tackle the problem of learning a linear regression model whose parameter is a fixed-rank matrix. We study the Riemannian manifold geometry of the set of fixed-rank matrices and develop efficient line-search algorithms. The proposed algorithms have many applications, scale to high-dimensional problems, enjoy local convergence properties and confer a geometric basis to recent contributions on learning fixed-rank matrices. Numerical experiments on benchmarks suggest that the proposed algorithms compete with the state-of-the-art, and that manifold optimization offers a versatile framework for the design of rank-constrained machine learning algorithms. [less ▲]

Detailed reference viewed: 193 (4 ULiège)
Full Text
See detailLinear Repeating Points [chap. 13]
Wolper, Pierre ULiege

in Kuper, Gabi; Libkin, Leonid; Paredaens, Jan (Eds.) Constraint Databases (2000)

Detailed reference viewed: 8 (0 ULiège)
Peer Reviewed
See detailLinear scoring in Belgian Blue cattle breed : a genetic analysis
Hanset, R.; Farnir, Frédéric ULiege; Michaux, Charles ULiege et al

(1996)

Detailed reference viewed: 24 (5 ULiège)
Full Text
Peer Reviewed
See detailLinear stability analysis of an evaporating binary liquid layer with fully transient reference profiles
Machrafi, Hatim ULiege; Rednikov, Alexey; Colinet, Pierre et al

in Bulletin of the American Physical Society, Vol. 55, n°16 (2010)

Detailed reference viewed: 20 (13 ULiège)
Full Text
Peer Reviewed
See detailA linear-quadratic model of cell survival considering both sublethal and potentially lethal radiation damage
Rutz, HP; COUCKE, Philippe ULiege; Mirimanoff, RO

in Radiotherapy & Oncology (1991), 21(4), 273-276

We assessed the dose-dependence of repair of potentially lethal damage in Chinese hamster ovary cells x-irradiated in vitro. The recovery ratio (RR) by which survival (SF) of the irradiated cells was ... [more ▼]

We assessed the dose-dependence of repair of potentially lethal damage in Chinese hamster ovary cells x-irradiated in vitro. The recovery ratio (RR) by which survival (SF) of the irradiated cells was enhanced increased exponentially with a linear and a quadratic component, namely xi and psi: RR = e xi D + psi D2. Survival of irradiated cells can thus be expressed by a combined linear-quadratic model considering four variable, namely alpha and beta for the capacity of the cells to accumulate sublethal damage, and xi and psi for their capacity to repair potentially lethal damage: SF = e(xi - alpha)D + (psi - beta)D2. [less ▲]

Detailed reference viewed: 46 (0 ULiège)
Full Text
Peer Reviewed
See detailLa linéarité comme métadiscours dans l’oeuvre de Murray Bail
Herbillon, Marie ULiege

in MethIS : Méthodes et Interdisciplinarité en Sciences Humaines (2008), 1

Si d’aucuns ont relevé, chez Murray Bail, une propension à la géométrisation des espaces textuels, nul n’a souligné la fonction politico-parodique de la ligne droite dans l’oeuvre de cet écrivain ... [more ▼]

Si d’aucuns ont relevé, chez Murray Bail, une propension à la géométrisation des espaces textuels, nul n’a souligné la fonction politico-parodique de la ligne droite dans l’oeuvre de cet écrivain australien contemporain. En feignant de souscrire à la culture de la linéarité, ce dernier vise pourtant à la dénoncer et, avec elle, un certain héritage occidental. Cette réflexion prend, à l’occasion, un tour métafictionnel : bien que ses intentions parodiques aient pu le contraindre à emprunter au réalisme traditionnel certains de ses codes narratifs, Bail a longtemps cherché à discréditer ce genre littéraire trop linéaire. Avec Eucalyptus (1998), l’auteur parvient toutefois à transcender la linéarité structurelle apparente de ses premiers romans. Cet article explore les manières dont Bail s’est approprié le réalisme et/ou l’a transgressé pour, en définitive, mieux l’intégrer à la littérature australienne. [less ▲]

Detailed reference viewed: 41 (15 ULiège)
Peer Reviewed
See detailLinearity and stationarity of the pharmacokinetics of tiludronate in horses
Delguste, Catherine ULiege; Doucet, Michèle; Amory, Hélène ULiege et al

Poster (2005)

Two studies were conducted in order to assess the linearity and stationarity of the pharmacokinetics of tiludronate in horses. For each study, plasma concentrations of tiludronate were measured by HPLC-UV ... [more ▼]

Two studies were conducted in order to assess the linearity and stationarity of the pharmacokinetics of tiludronate in horses. For each study, plasma concentrations of tiludronate were measured by HPLC-UV at regular intervals and noncompartmental analysis was performed. First, single intravenous administrations of 0.05 (group 1, n = 5), 0.1 (group 2, n = 5) and 0.2 mg/kg (group 3, n = 5) were performed in healthy male adult horses. A linear relationship between groups was found for C5min (C5min = 0.0726 + 11.8589 * dose) as well as for AUC0-inf (AUC0-inf = -0.632561 + 30.9649 * dose). Clearance ranged from 0.033 to 0.044 L/h/kg and was not significantly different between groups. MRT (h) were 3.96, 4.95 and 9.40 and VDss (L/kg) were 0.16, 0.19 and 0.28 for the 0.05, 0.1 and 0.2 mg/kg doses respectively. Second, 10 daily intravenous administrations at a dosage rate of 0.1 mg/kg were administered to 4 healthy horses. Plasma tiludronate concentrations were measured after the 1st and 10th dose as well as 8 hours after each dose. The mean plasma accumulation ratio between the 1st and the 10th dose was 1.31 ± 0.48. Medians of the tiludronate concentration values measured in plasma 8 hours post-dose were not statistically different between doses. Maximum and minimum concentrations of tiludronate (mg/L) following the last dose were 0.91 and 0.04 respectively. It was concluded that the pharmacokinetics of tiludronate in horses are linear from 0.05 to 0.2 mg/kg IV and stationary after 10 IV administrations of 0.1 mg/kg. [less ▲]

Detailed reference viewed: 82 (2 ULiège)