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See detailDependence of the structure of core-shell-corona micelles on the composition of water/toluene mixtures
Lei, Liangcai; Gohy, Jean-François; Willet, Nicolas ULg et al

in Polymer (2006), 47(8), 2723-2727

The poly(styrene)-block-poly(2-vinylpyridine)-block-poly(ethyleile oxide) triblock copolymer. PS200-b-P2VP(140)-b-PEO590, where the subscripts refer to the average degrees of polymerisation of the ... [more ▼]

The poly(styrene)-block-poly(2-vinylpyridine)-block-poly(ethyleile oxide) triblock copolymer. PS200-b-P2VP(140)-b-PEO590, where the subscripts refer to the average degrees of polymerisation of the constitutive blocks, has been dissolved in water/toluene mixtures with a large range of composition, i.e. in (i) toluene added with a small amount of water. (ii) water-in-toluene emulsion forming mixtures, (iii) toluene-in-water emulsion forming mixtures, and (iv) water added with a small amount of toluene. These Solutions have been cast on a carbon-coated copper grid, and the morphology of the dried copolymer deposition has been observed by transmission electron microscopy. Rod-like aggregates with a core-shell-corona micellar structure are formed in cases (i) and (iv). Nevertheless, PEO is the core and PS is the corona in case (i). whereas the reverse situation prevails in case (iv). When an emulsion is the precursor of the dried copolymer aggregates, either onion-like structures (case ii) or vesicles mixed with more complex aggregates are formed (case iii). These structures are thought to reflect the self-organization of the PS200-b- P2VP(140)-b-PEO590 copolymer at the water/toluene interface of the water-in-toluene and toluene-in-water emulsions. respectively. [less ▲]

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See detailDependency of Premature Ventricular Contractions on Heart Rate and Circadian Rhythms During Childhood
Massin, M. M.; Maeyns, K.; Withofs, Nadia ULg et al

in Cardiology (2000), 93(1-2), 70-3

The aim of the present study was to identify and quantify the rate dependence of premature ventricular contractions (PVC) during childhood. A 24-hour Holter recording was performed in 16 consecutive ... [more ▼]

The aim of the present study was to identify and quantify the rate dependence of premature ventricular contractions (PVC) during childhood. A 24-hour Holter recording was performed in 16 consecutive children, aged 22 days to 11 years (mean age 5.6 years), with frequent (>5,000/day), isolated monomorphic PVC. Those PVC were identified and the length of the preceding sinus cycle was measured. The values were ordered into 50-ms class intervals, and the percentage of PVC for each class was calculated and then analyzed by linear regression analysis. On the basis of the significance of the p value, and the positive or negative value of the slope, we identified a tachycardia-enhanced, a bradycardia-enhanced, and an indifferent pattern. Chronobiologic analysis was made by the cosinor method. All the patients had upper and lower limits of cycle length beyond which PVC disappeared. A tachycardia-enhanced pattern was present in 7 patients and an indifferent one in 9 patients. In the latter a second-degree polynomial correlation was systematically found. Children but not infants had a significant circadian variation in the frequency of PVC with a very variable time of highest incidence. In conclusion, it is possible to identify a circadian rhythm of PVC and a spontaneous trend between their incidence and the length of the preceding cardiac cycle in children. [less ▲]

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See detailDependency-based analyses for function words. Introducing the polygraphic approach
Kahane, Sylvain; Mazziotta, Nicolas ULg

in Nivre, Joakim; Hajicova, Eva (Eds.) Proceedings of Depling 2015. International conference on dependency linguistics (2015)

This paper scrutinizes various dependency-based representations of the syntax of function words, such as prepositions. The focus is on the underlying formal object used to encode the linguistic analyses ... [more ▼]

This paper scrutinizes various dependency-based representations of the syntax of function words, such as prepositions. The focus is on the underlying formal object used to encode the linguistic analyses and its relation to the corresponding linguistic theory. Two types of representation are proposed for the encoding of syntactic properties and applied for function words. Although the mathematical object introduced here encodes a dependency-based analysis, it does not consist in a tree. It is rather more general than a graph (it allows edges to be vertices of other edges) and is called a polygraph. [less ▲]

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See detailLa dépense énergétique chez l'homme
Bustin, F.; Pestieau, S. R.; Paquot, Nicolas ULg et al

in Revue Médicale de Liège (1997), 52(2), 101-4

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See detailDépenses en viande par les ménages belges en 2008
Ferrandis Vallterra, Salvador ULg; Brostaux, Yves ULg; Claustriaux, Jean-Jacques ULg et al

Speech/Talk (2012)

Analysis of meat expenditure by Belgian households in 2008. Meat expenditure by Belgian households during 2008 is analyzed. Expenditure is extracted from the Belgian Household Budget Survey at the FPS ... [more ▼]

Analysis of meat expenditure by Belgian households in 2008. Meat expenditure by Belgian households during 2008 is analyzed. Expenditure is extracted from the Belgian Household Budget Survey at the FPS Economy, S.M.E.s, Self-employed and Energy. The database also provides sociodemographic information about the households participating in the survey. To explain the observed variability of the meat expenditure based on the explanatory factors available, an analysis of the covariance is performed. The three quantitative factors have a bigger effect on the meat expenditure than the three other qualitative factors. The proportion of meat expenditure variability explained by the explanatory factors of the selected model is 31,41%. [less ▲]

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See detailDépenses fiscales: distorsions et effets sur la croissance
Jurion, Bernard ULg

Report (2005)

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See detailLe dépérissement de l'aulne en Wallonie (1ère partie)
Debruxelles, N.; Chandelier, A.; Dufays, Edwin ULg et al

in Silva Belgica (2007), 114(3), 32-35

La maladie de l’aulne, causée par un Phytophthora, a été signalée pour la première fois en Angleterre en 1993 (Gibbs, 1995[1]). En Belgique, le premier signalement date de 1999 (Cavelier et al, 1999[2 ... [more ▼]

La maladie de l’aulne, causée par un Phytophthora, a été signalée pour la première fois en Angleterre en 1993 (Gibbs, 1995[1]). En Belgique, le premier signalement date de 1999 (Cavelier et al, 1999[2]). Un inventaire réalisé en Wallonie en 2002 sur 184 placettes situées le long des cours d’eau wallons a démontré que la maladie était présente sur tout le réseau hydrographique puisque 63% des placettes inventoriées comptaient des aulnes présentant des symptômes. Sur plus de 1000 aulnes décrits, près de 27% présentaient des symptômes de la maladie. (Debruxelles, 2003[3]). [less ▲]

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See detailLe dépérissement de l'aulne en Wallonie (2ème partie) - Identification des symptômes et recommandations de gestion
Debruxelles, N.; Chandelier, A.; Dufays, Edwin ULg et al

in Silva Belgica (2007), 114(4), 24-29

La première partie de l’article, parue dans Silva Belgica n°3/2007, a été rédigé par les mêmes auteurs sous le titre : « Le dépérissement de l’aulne en Wallonie (1ère partie) ». Cette seconde partie ... [more ▼]

La première partie de l’article, parue dans Silva Belgica n°3/2007, a été rédigé par les mêmes auteurs sous le titre : « Le dépérissement de l’aulne en Wallonie (1ère partie) ». Cette seconde partie présente les symptômes et l’évolution du dépérissement de l’aulne, ainsi que les recommandations de gestion des cordons d’aulnes dépérissants. [less ▲]

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See detailDépérissement de nos abeilles?
Nguyen, Bach Kim ULg; Widart, Joëlle ULg; De Pauw, Edwin ULg et al

Article for general public (2007)

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See detailLe dépérissement des abeilles en Wallonie
Nguyen, Bach Kim ULg; Haubruge, Eric ULg

Article for general public (2004)

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See detailLe dépérissement des abeilles
Nguyen, Bach Kim ULg; Haubruge, Eric ULg

Conference given outside the academic context (2009)

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See detailLa dépersonnalisation, son espace, sa motricité
Gauthier, Jean-Marie ULg

in Evolution Psychiatrique (1981), 46(4), 895-907

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See detailDéphaseurs en polymères à cristaux liquides pour la coronographie
Piron, Pierre ULg

Scientific conference (2012, May 22)

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See detailDephasing in quantum chaotic transport: A semiclassical approach
Whitney, Robert S.; Jacquod, Philippe; Petitjean, Cyril ULg

in PHYSICAL REVIEW B (2008), 77(4), 045315-22

We investigate the effect of dephasing (decoherence) on quantum transport through open chaotic ballistic conductors in the semiclassical limit of small Fermi wavelength to system size ratio, lambda(F)/L ... [more ▼]

We investigate the effect of dephasing (decoherence) on quantum transport through open chaotic ballistic conductors in the semiclassical limit of small Fermi wavelength to system size ratio, lambda(F)/L < 1. We use the trajectory-based semiclassical theory to study a two-terminal chaotic dot with decoherence originating from (i) an external closed quantum chaotic environment, (ii) a classical source of noise, and (iii) a voltage probe, i.e., an additional current-conserving terminal. We focus on the pure dephasing regime, where the coupling to the external source of dephasing is so weak that it does not induce energy relaxation. In addition to the universal algebraic suppression of weak localization, we find an exponential suppression of weak localization proportional to exp[-(tau) over tilde/tau(phi)], with the dephasing rate tau(-1)(phi). The parameter (tau) over tilde depends strongly on the source of dephasing. For a voltage probe, (tau) over tilde is of order the Ehrenfest time proportional to ln[L/lambda(F)]. In contrast, for a chaotic environment or a classical source of noise, it has the correlation length xi of the coupling or noise potential replacing the Fermi wavelength lambda(F). We explicitly show that the Fano factor for shot noise is unaffected by decoherence. We connect these results to earlier works on dephasing due to electron-electron interactions and numerically confirm our findings. [less ▲]

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See detailDephasing in the semiclassical limit is system-dependent
Petitjean, Cyril ULg; Jacquod, P.; Whitney, R. S.

in JETP LETTERS (2007), 86(10), 647-651

Dephasing in open quantum chaotic systems has been investigated in the limit of large system sizes to the Fermi wavelength ratio, L/lambda F >> 1. The weak localization correction g(wl) to the conductance ... [more ▼]

Dephasing in open quantum chaotic systems has been investigated in the limit of large system sizes to the Fermi wavelength ratio, L/lambda F >> 1. The weak localization correction g(wl) to the conductance for a quantum dot coupled to (i) an external closed dot and (ii) a dephasing voltage probe is calculated in the semiclassical approximation. In addition to the universal algebraic suppression g wl proportional to (1 + tau(D)/tau(phi))(-1) with the dwell time tau(D) through the cavity and the dephasing rate, we find an exponential suppression of weak localization by a factor of proportional to exp[-(tau) over tilde/tau(phi)], where is the system-dependent parameter. In the dephasing probe model, (tau) over tilde coincides with the Ehrenfest time, (tau) over tilde proportional to ln[L/lambda(F)], for both perfectly and partially transparent dot-lead couplings. In contrast, when dephasing occurs due to the coupling to an external dot, (tau) over tilde proportional to ln[L/xi] depends on the correlation length xi of the coupling potential instead of lambda(F). [less ▲]

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