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See detailDissertations académiques
Kurth, Godefroid ULg

Book published by Demarteau (1888)

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See detailUne dissidence conviviale. Approche socio-littéraire du premier Cercle Zutique.
Saint-Amand, Denis ULg

Master's dissertation (2007)

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See detailDissipation in quasistatically sheared wet and dry sand under confinement
Fiscina, J.E.; Pakpour, M.; Fall, A. et al

in Physical Review. E : Statistical, Nonlinear, and Soft Matter Physics (2012), 86

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See detailA dissipative approach to the identification of biochemical reaction networks
Fey, Dirk ULg; Bullinger, Eric ULg

in 15th IFAC Symposium on System Identification, Saint Malo, France (2009, July)

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See detailDissipative forces and external resonances
Jancart, Sylvie ULg; Lemaitre, Anne

in Celestial mechanics and Dynamical Astronomy (2001), 81

We analyze the process of resonance trapping due to Poynting-Robertson drag and Stokes drag in the frame of the restricted 3-body problem and in the case of external mean motion resonances. The numerical ... [more ▼]

We analyze the process of resonance trapping due to Poynting-Robertson drag and Stokes drag in the frame of the restricted 3-body problem and in the case of external mean motion resonances. The numerical simulations presented are computed by using the 3-dimensional extended Schubart averaging (ESA) integrator developed by Moons (1994) for all mean motion resonances. We complete it by adding the contributions of the dissipative forces. To follow the philosophy of the initial integrator, we average the drag terms, but we do not make any expansion in series of eccentricity or inclination. We show our results, especially capture around asymmetric equilibria, and compare them to those found by Beaué and Ferraz-Mello (1993, 1994) and Liou et al. (1979). [less ▲]

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See detailDissipative Forces and External Resonances
Jancart, Sylvie ULg; Lemaitre, Anne

in Richardson, David; Seidelmann, Kenneth; Wnuk, Edwin (Eds.) Dynamics of Natural and Artificial Celestial Bodies (2002, January 01)

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See detailDISSIPATIVITY AND GLOBAL ANALYSIS OF LIMIT CYCLES IN NETWORKS OF OSCILLATORS
Stan, Guy-Bart; Sepulchre, Rodolphe ULg

in Proceedings of the 16th Symposium on Mathematical Theory of Networks and Systems (2004, July)

This paper is concerned with the global analysis of synchrone oscillations in special networks of oscillators. In previous work, we de ned a class of highdimensional, parameter-dependent nonlinear systems ... [more ▼]

This paper is concerned with the global analysis of synchrone oscillations in special networks of oscillators. In previous work, we de ned a class of highdimensional, parameter-dependent nonlinear systems exhibiting almost globally asymptotically stable limit cycle oscillations. In this paper, we show how (incremental) dissipativity may be used to extend the global analysis of limit cycle oscillations to networks of coupled identical systems. [less ▲]

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See detailDissociable components of phonological and lexical-semantic short-term memory and their relation to impaired word production in aphasia
Verhaegen, Clémence ULg; PIERTOT, Florence ULg; Poncelet, Martine ULg

in Cognitive Neuropsychology (2013), 30(7-8), 544-563

This study assesses the dissociability of phonological and lexical-semantic short-term memory (STM) in two aphasic patients, B.N. and T.M., and explores the relationship between their STM deficits and ... [more ▼]

This study assesses the dissociability of phonological and lexical-semantic short-term memory (STM) in two aphasic patients, B.N. and T.M., and explores the relationship between their STM deficits and their word production impairment. Picture naming performance suggests phonological language production impairment in B.N. and lexical-semantic language production impairment in T.M. On STM tasks, B.N. presented phonological STM impairment with preserved lexical-semantic STM, while T.M. presented the reverse profile. These results reveal a double dissociation between phonological and lexical-semantic STM capacities and suggest that our patients' STM impairment may be selectively related to their language production deficits [less ▲]

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See detailDissociable effects of social context on song and doublecortin immunoreactivity in male canaries.
Alward, Beau A.; Mayes, Wade D.; Peng, Katherine et al

in The European journal of neuroscience (2014), 40(6), 2941-7

Variation in environmental factors such as day length and social context greatly affects reproductive behavior and the brain areas that regulate these behaviors. One such behavior is song in songbirds ... [more ▼]

Variation in environmental factors such as day length and social context greatly affects reproductive behavior and the brain areas that regulate these behaviors. One such behavior is song in songbirds, which males use to attract a mate during the breeding season. In these species the absence of a potential mate leads to an increase in the number of songs produced, while the presence of a mate greatly diminishes singing. Interestingly, although long days promote song behavior, producing song itself can promote the incorporation of new neurons in brain regions controlling song output. Social context can also affect such neuroplasticity in these song control nuclei. The goal of the present study was to investigate in canaries (Serinus canaria), a songbird species, how photoperiod and social context affect song and the incorporation of new neurons, as measured by the microtubule-associated protein doublecortin (DCX) in HVC, a key vocal production brain region of the song control system. We show that long days increased HVC size and singing activity. In addition, male canaries paired with a female for 2 weeks showed enhanced DCX-immunoreactivity in HVC relative to birds housed alone. Strikingly, however, paired males sang fewer songs that exhibited a reduction in acoustic features such as song complexity and energy, compared with birds housed alone, which sang prolifically. These results show that social presence plays a significant role in the regulation of neural and behavioral plasticity in songbirds and can exert these effects in opposition to what might be expected based on activity-induced neurogenesis. [less ▲]

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See detailThe Dissociaitve Ionization of C2H2 and C2D2. The [CH(CD)]+ dissociaiton channel. The H(D)C-C(D)H Binding Energy.
Davister, M.; Locht, Robert ULg

in Chemical Physics (1995), 191

The dissociative electroionization of C2H2(C2D2) has been investigated in the CH+(CD+) dissociation channel. The translational energy distribution of the fragment ion has been examined as a function of ... [more ▼]

The dissociative electroionization of C2H2(C2D2) has been investigated in the CH+(CD+) dissociation channel. The translational energy distribution of the fragment ion has been examined as a function of the electron energy between 20 and 99 eV. The first differentiated ionization efficiency curve has been measured for KE(CH+)=0.0-6.0 eV. Threshold energies of CH+ and CD+ have been measured and the effect of isotopic substitution is discussed. For the lowest onset of both CH+ and CD+, and from the kinetic energy measurements, the C-C bond strength has been derived, i.e. D(HC-CH)=9.83+/-0.10 eV. Higher appearance energies are assigned and reaction mechanisms are proposed. Above 34 eV electron energy, the CH+ ions carrying 2.0-5.5 eV kinetic energy are produced through Coulomb explosion of (C2H2)2+ states. [less ▲]

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See detailDISSOCIATING SHORT-TERM MEMORY AND LANGUAGE IMPAIRMENT: THE IMPORTANCE OF ITEM AND SERIAL ORDER INFORMATION
Attout, Lucie ULg; VAN DER KAA, Marie-Anne ULg; GEORGE, Mercédès ULg et al

in Aphasiology (2012), 26(3-4), 355-382

BACKGROUND: Selective verbal short-term memory (STM) deficits are rare, and when they appear, they are often associated with a history of aphasia, raising doubts about the selectivity of these deficits ... [more ▼]

BACKGROUND: Selective verbal short-term memory (STM) deficits are rare, and when they appear, they are often associated with a history of aphasia, raising doubts about the selectivity of these deficits. Recent models of STM consider that STM for item information depends upon activation of the language system, and hence item STM deficits should be associated with language impairment. By contrast, STM for order information is considered to recruit a specific system, distinct from the language system: this system could be impaired in patients with language-independent STM deficits. AIM: We demonstrate here the power of the item-order distinction to separate STM and language impairments in two brain damaged cases with STM impairment and a history of aphasia. METHODS & PROCEDURES: Recognition and recall STM tasks, maximizing STM for either item or order information were administered to patients MB and CG. OUTCOMES & RESULTS: Patient MB showed mild phonological impairment. As predicted, associated STM deficits were characterized by poor item STM but preserved order STM. On the other hand, patient CG showed no residual language deficits. His STM deficit was characterized by poor order STM but perfectly preserved item STM. CONCLUSIONS: This study presents the first double dissociation between item and order STM deficits, and demonstrates the necessity of this distinction for understanding and assessing STM impairment in patients with and without aphasia. [less ▲]

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See detailDissociation between controlled and automatic processes in the behavioral variant of fronto-temporal dementia
Collette, Fabienne ULg; Van der Linden, Martial ULg; Salmon, Eric ULg

in Journal of Alzheimer's Disease [=JAD] (2011), 22(3), 897-907

A decline of cognitive functioning affecting several cognitive domains was frequently reported in patients with frontotemporal dementia. We were interested in determining if these deficits can be ... [more ▼]

A decline of cognitive functioning affecting several cognitive domains was frequently reported in patients with frontotemporal dementia. We were interested in determining if these deficits can be interpreted as reflecting an impairment of controlled cognitive processes by using an assessment tool specifically developed to explore the distinction between automatic and controlled processes, namely the process dissociation procedure (PDP) developed by Jacoby [1]. The PDP was applied to a word stem completion task to determine the contribution of automatic and controlled processes to episodic memory performance and was administered to a group of 12 patients with the behavioural variant of frontotemporal dementia (bv-FTD) and 20 control subjects (CS). Bv-FTD patients obtained a lower performance than CS for the estimates of controlled processes, but no group differences was observed for estimates of automatic processes. The between-groups comparison of the estimates of controlled and automatic processes showed a larger contribution of automatic processes to performance in bv-FTD, while a slightly more important contribution of controlled processes was observed in control subjects. These results are clearly indicative of an alteration of controlled memory processes in bv-FTD. [less ▲]

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See detailDissociation between recall and recognition memory in amnesia
Bastin, Christine ULg

Scientific conference (2004)

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