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See detailLes absences de longues durées pour lombalgie au sein du personnel soignant dans le secteur hospitalier
Vidick, Sarah ULg; Mairiaux, Philippe ULg

in Santé Publique : Revue Multidisciplinaire pour la Recherche et l'Action (2008), (Suppl. N° 3), 29-37

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See detailEfficiency of TET in coupled oscillators associated with 1: resonance: Part 1
Quinn, D. Dane; Gendelman, Oleg; Kerschen, Gaëtan ULg et al

in Journal of Sound & Vibration (2008), 311

We study targeted energy transfers and nonlinear transitions in the damped dynamics of a two degree-of-freedom system of coupled oscillators (a linear oscillator with a lightweight, essentially nonlinear ... [more ▼]

We study targeted energy transfers and nonlinear transitions in the damped dynamics of a two degree-of-freedom system of coupled oscillators (a linear oscillator with a lightweight, essentially nonlinear, ungrounded attachment), caused by 1:1 resonance captures of the dynamics. Part I of this work deals with the underlying structure of the Hamiltonian dynamics of the system, and demonstrates that, for sufficiently small values of viscous damping, the damped transitions are strongly influenced by the underlying topological structure of periodic and quasiperiodic orbits of the corresponding Hamiltonian system. Focusing exclusively on 1:1 resonance captures in the system, it is shown that the topology of these damped transitions affect drastically the efficiency of passive energy transfer from the linear system to the nonlinear attachment. Then, a detailed computational study of the different types of nonlinear transitions that occur in the weakly damped system is presented, together with an analytical treatment of the nonlinear stability of certain families of periodic solutions of the underlying Hamiltonian system that strongly influence the said transitions. As a result of these studies, conditions on the system and forcing parameters that lead to effective or even optimal energy transfer from the linear system to the nonlinear attachment are determined. In Part II of this work, direct analytical treatment of the governing strongly nonlinear damped equations of motion is performed, in order to analytically model the dynamics in the region of optimal energy transfer, and to determine the characteristic time scales of the dynamics that influence the capacity of the nonlinear attachment to passively absorb and locally dissipate broadband energy from the linear oscillator. r 2007 Elsevier Ltd. All rights reserved [less ▲]

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See detail« François Ier dans les lettres et les écrits de Guichardin »
Moreno, Paola ULg

in Van Emerljick, Tania; Colombo Timelli, Maria (Eds.) Quant l’ung amy pour l’autre veille. Mélanges de moyen français offerts à Claude Thiry. (2008)

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See detailToll-like receptor-4 is expressed in meningiomas and mediates the antiproliferative action of paclitaxel.
Tichomirowa, Maria A.; Theodoropoulou, Marily; Daly, Adrian ULg et al

in International Journal of Cancer = Journal International du Cancer (2008), 123(8), 1956-63

Meningiomas are the second most common type of brain and CNS tumors by histology. Surgery and radiotherapy are main treatment options, but meningiomas may be impossible to adequately resect or may regrow ... [more ▼]

Meningiomas are the second most common type of brain and CNS tumors by histology. Surgery and radiotherapy are main treatment options, but meningiomas may be impossible to adequately resect or may regrow after surgery. In spite of many experimental attempts, there is no generally accepted chemotherapeutic approach. We have studied in a series of meningiomas the expression of the Toll-like receptor 4 (TLR4), which apart from its major role as a key factor of the innate immune system, is believed to play a role in tumorigenesis. All meningiomas studied expressed TLR4 mRNA and protein at variable degree. Paclitaxel, a ligand of TLR4, exhibited a dose- and time-dependent growth suppression in both monolayer and spheroid meningioma cell cultures. The knockdown of TLR4 with siRNA in meningioma cell cultures abrogated the inhibitory effect of paclitaxel. The suppressive action of paclitaxel on meningioma cell growth was enhanced in the presence of fluvastatin or the mitogen-actvated protein kinase (ERK1/2) inhibitor PD98059. At least part of the growth suppressive effect was mediated by the induction of apoptosis in meningioma cells by paclitaxel alone or in combination with fluvastatin. In conclusion, our in vitro results suggest that paclitaxel alone or in combination with other inhibitors of cell growth (statins, MAPK inhibitors) could provide a potential tool for the treatment of TLR4 expressing meningiomas. [less ▲]

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See detailLa distribution spatiale des Acanthaceae dans les secteurs phytogéographiques de Ndjele (1988) en RD Congo
Koffi, K J; Boyemba, F; Ndjele, M et al

in Annales de la Faculté des Sciences, Université de Kisangani (2008), 13

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See detailLes incunables et les post-incunables
Adam, Renaud ULg

in Maillard-Luypaert, Monique (Ed.) Séminaire de Tournai : histoire, bâtiments, collections (2008)

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See detailStrained silicon on wafer level by wafer bonding: materials processing, strain measurements and strain relaxation
Reiche, M.; Moutanabbir, O.; Himcinschi, C. et al

in ECS Transactions (2008), 16

Different methods to introduce strain in thin silicon device layers are presented. Uniaxial strain is introduced in CMOS devices by process-induced stressors allowing the local generation of tensile or ... [more ▼]

Different methods to introduce strain in thin silicon device layers are presented. Uniaxial strain is introduced in CMOS devices by process-induced stressors allowing the local generation of tensile or compressive strain in the channel region of MOSFETs. Biaxial strain is introduced by growing thin silicon layer on SiGe buffer and transferring it to an oxidized silicon substrates. The latter forms strained silicon on insulator (SSOI) wafer characterized by tensile strain only. Future CMOS device technologies require the combination of the global strain of SSOI substrates with local stressors to increase the device performance. [less ▲]

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See detailTechniques de rééducation des coiffes réparées chirurgicalement
Forthomme, Bénédicte ULg; Crielaard, Jean-Michel ULg; Croisier, Jean-Louis ULg

in Brunon-Martinez, A.; Codine, Philippe; Hérisson, C. (Eds.) Coiffe des rotateurs opérée et rééducation (2008)

Rotator cuff tears that do not respond to non-operative care may require surgical intervention. There are numerous surgical techniques to repair rotator cuff tears. Recently, arthroscopic rotator cuff ... [more ▼]

Rotator cuff tears that do not respond to non-operative care may require surgical intervention. There are numerous surgical techniques to repair rotator cuff tears. Recently, arthroscopic rotator cuff repairs have become more popular. An abduction pillow is used after rotator repair to alleviate stress on the cuff repair; the use of the pillow ranges 4 to 5 weeks. In the first phase (0 to 4 weeks), the immediate postoperative period, the rehabilitation goals are to (1) protect the healing soft tissues, (2) prevent the negative effects of immobilization, (3) diminish postoperative pain and inflammation. Passive range of motion should be performed to minimize the patient’s chances of developing adhesive capsulite shoulder. Phase II (4 to 6 weeks), the intermediate phase, emphasizes the advancement of shoulder mobility. During this phase, the patients range of motion is gradually increased by using passive, active assisted and active range of motion joint mobilization techniques and stretching (mainly in patients with less motion than desirable). The third phase (up to 6 weeks), the dynamic strengthening phase is focused on improving the patient’s strength, power and endurance while maintaining a functional range of motion of the shoulder joint. Muscular balance and dynamic joint stability should be achieved before aggressive strengthening exercises such as plyometrics or functional throwing. [less ▲]

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See detailLes hyperconflits en organisation
Faulx, Daniel ULg; Delvaux, Sophie

in Actes du 15ème Congrès de Psychologie du Travail et des Organisation de Langue Française. CD-rom. Québec.. (2008)

La description et la compréhension des conflits extrêmes ou « hyperconflits » constituent de nouvelles préoccupations en Psychologie du Travail et des Organisations. A partir de l’analyse des résultats de ... [more ▼]

La description et la compréhension des conflits extrêmes ou « hyperconflits » constituent de nouvelles préoccupations en Psychologie du Travail et des Organisations. A partir de l’analyse des résultats de huit focus groups composés de professionnels du traitement des conflits, nous dégageons 24 indicateurs des hyperconflits. Plus généralement, il ressort de notre étude que ces situations sont liées à une réduction de la complexité du système organisationnel couplée à une généralisation de la dynamique conflictuelle du point de vue de l’espace-temps, des processus et des conséquences. Les implications en termes d’interventions sont également discutées. [less ▲]

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See detailAstrobiologie
Javaux, Emmanuelle ULg; Claeys, Philippe; Dehant, Véronique et al

Learning material (2008)

powerpoint sur MyULg, notes partielles imprimées

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See detailAphid honeydew is not only a sugary and amino-acid secretion
Leroy, Pascal ULg; Heuskin, Stéphanie ULg; Sabri, Ahmed ULg et al

Poster (2008)

Aphids, feeding from the phloem sap of plants, are the most common honeydew producing insects. This aphid excretory product consists in an aqueous mixture of different chemical compounds of which the most ... [more ▼]

Aphids, feeding from the phloem sap of plants, are the most common honeydew producing insects. This aphid excretory product consists in an aqueous mixture of different chemical compounds of which the most important are sugars (90-95% of the dry weight) and amino acids. This excretory product, used by parasitoids and predators, plays a crucial role in the tritrophic interactions : (1) honeydew is an important food complement and (2) honeydew acts as a volatile and a contact kairomone. These characteristics could be exploited for enhancing the biological control in fields through the use of an « artificial honeydew ». [less ▲]

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See detailClimate oscillations evidenced by spectral analysis of Southern Chilean lacustrine sediments: the assessment of ENSO over the last 600 years
Fagel, Nathalie ULg; Boes, X.; Loutre, M. F.

in Journal of Paleolimnology (2008), 39(2), 253-266

The Chilean Lake District (38-42 degrees S) is strongly influenced by Southern westerlies-driven precipitations. At 40 degrees S Lago Puyehue provides high resolution sedimentation rates (similar to 1-2 ... [more ▼]

The Chilean Lake District (38-42 degrees S) is strongly influenced by Southern westerlies-driven precipitations. At 40 degrees S Lago Puyehue provides high resolution sedimentation rates (similar to 1-2 mm/yr) suitable for annual climate reconstruction. Several short and long sediment cores were collected in this lake. Their analysis aim at a better understanding of climate mechanisms related to ENSO in this part of the world. The recognition of ENSO related periodicities and their stability is studied through the analysis of two short varved cores collected from underflow and interflow key sites. According to varve chronology controlled by Cs-137 and Pb-210 profiles and chronostratigraphical markers, the short core from underflow site (PU-I) spans 294 +/- 18 years and the core in the interflow site (PU-II) covers 592 +/- 9 years. Several methods of spectral analysis were applied on the total varve thickness to identify potential periodicities in the signal. Blackman-Tuckey, Maximum Entropy, Multi-Taper Methods (MTM) and singular spectrum analysis were applied on the whole record. In addition, evolutive MTM and wavelet analyses allow to identify temporal influence of some periodicities. In the PU-I studied interval (AD 1700-2000), a period at similar to 3.0 years appears in a large part of the interval, mostly in the recent part. Periods at similar to 5.2 and similar to 23 years also show up. PU-II record (AD 1400-2000) displays the most robust periodicities at around 15, 9, 4.4, 3.2 and 2.4 years. These periodicities are in good agreement with the sub-decadal periods identified by Dean and Kemp (2004) and linked to the El Nino Southern Oscillation and the Pacific Decadal Oscillation. Differences in the recorded periodicities between PU-I and PU-II sites are consistent with different sedimentation processes in the lake. According to climate instrumental data for the last 20 years, varves in PU-I site are mostly related to fluvial dynamics and regional climate factors, i.e., precipitation, temperature and wind. In PU-II site, varves increment is related to both regional and global climate forcing factors, i.e., El Nino Southern Oscillation. The evolutive MTM analysis and the wavelet analysis suggest a striking break in the periodicities at around AD 1820. Finally relationships between El Nino and longer term climate phase like the Little Ice Age (LIA) are also assessed. [less ▲]

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See detailProfile of methylaion of tumour related genes in breast cancer in Tunisian women
Hachana, Mohamed Ridha ULg; Trimeche, Mounir; Ziadi, Sonia et al

in European Journal of Cancer (2008), 6(9), 195

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See detailLifetime absolute risk of hip and other osteoporotic fracture in Belgian women.
Hiligsmann, Mickaël ULg; Bruyère, Olivier ULg; Ethgen, Olivier ULg et al

in BONE (2008), 43(6), 991-4

OBJECTIVES: To estimate the lifetime absolute risks of hip and other osteoporotic fracture in Belgian women aged 60 years and to examine the effect of changes in baseline population fracture risk and ... [more ▼]

OBJECTIVES: To estimate the lifetime absolute risks of hip and other osteoporotic fracture in Belgian women aged 60 years and to examine the effect of changes in baseline population fracture risk and changes in life expectancy. MATERIALS AND METHODS: Estimates were performed using a Markov microsimulation model and were based on the incidence of first fracture as well as life expectancy. Baseline scenario included projected mortality rates and increasing fracture incidence by 1% per year. Alternative scenarios were performed on age, life expectancy and trends in fracture incidence. Lifetime fracture risk for osteoporotic population (T-score <or= -2.5) was also estimated. RESULTS: In the baseline scenario, lifetime absolute risks of hip fracture and of any major osteoporotic fracture (hip, clinical vertebral or wrist) were respectively 24.8% and 44.3%. Alternative scenarios showed that when assuming no change of age-specific fracture rates over time, these lifetime risks were 18.3% and 35.2%, while these values were 20.0% and 38.3% assuming no future mortality reductions. For osteoporotic women, these values were respectively 34.5% and 51.5%. CONCLUSION: We conclude that absolute lifetime fracture risks are substantial and that trends in fracture incidence and changes in life expectancy have a marked impact on absolute lifetime fracture risks. [less ▲]

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See detailPrinciples of design of a set-reset finite state logic nanomachine
Klein, M.; Levine, R. D.; Remacle, Françoise ULg

in Journal of Applied Physics (2008), 104(4),

Pulsed electrical set and reset inputs are used to simulate the temporal action of a finite state machine in a three terminal configuration for a variety of arrangements. The gate electrode is necessary ... [more ▼]

Pulsed electrical set and reset inputs are used to simulate the temporal action of a finite state machine in a three terminal configuration for a variety of arrangements. The gate electrode is necessary only if it is of interest to tune the tunneling rate and to compensate for background charges. When the output is the current, a source and drain electrodes are required. If the output is determined by measuring charge occupancy, then a single junction suffices. The electron transfer rates are computed from the free energy change for a single electron transfer to or from a quantum dot of size such that only charge quantization matters. For a small enough dot the device could operate at room temperature. An asymmetric configuration of the source and drain favors a longer term time preservation of the memory of the device. An alternative design that operates with the same energetics and kinetic parameters is to pulse the resistance rather than the voltage. (C) 2008 American Institute of Physics. [less ▲]

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See detailUrgences Pédiatriques
Carvelli, Thierry ULg; Viellevoye, Renaud ULg; Misson, Jean-Paul ULg

Book published by Université de Liège (2008)

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See detailInvestigation of carbohydrate binding property of a fungal lectin from Xerocomus chrysenteron and potential use on Myzus persicae aphid.
Jaber, Karimi; Cuartero Diaz, Gaetan; Haubruge, Eric ULg et al

in Communications in Agricultural and Applied Biological Sciences (2008), 73(3), 629-38

In recent years encoding insecticidal Lectins have been suggested as one of the promising methods against insect pests and have been engineered successfully into a variety of crops including wheat, rice ... [more ▼]

In recent years encoding insecticidal Lectins have been suggested as one of the promising methods against insect pests and have been engineered successfully into a variety of crops including wheat, rice, tobacco and potatoes. Xerocomus chrysenteron Lectin (XCL) has a high hemagglutinating activity and results obtained from sugar specificity assay showed to have specific affinity to Galactose and N-Acetylgalactosamine (GalNAc). In previous studies, XCL was shown to have negative effects on some insect pests, including aphids. In the present study, the effects of different carbohydrates including D-glucose, D-mannose, D-galactose and GalNAc, associated with 0.1% XCL (w/v) in artificial diet was investigated to assess the evolution of the lectin toxicity toward Myzus persicae aphid during 7 days. M. persicae, a polyphagous aphid, showed no significant differences of mortality when fed with the XCL lectin associated with Glucose and Mannose or fed on XCL diet only. At the opposite, the mortality rates related to artificial diet supplemented with Galactose or GalNAc and XCL were significantly reduced. There was then a significant mortality difference between M. persicae fed on an artificial diet incorporated specific carbohydrate binding Lectin with those fed with lectin only. The potential use of this particular fungal Lectin (XCL) with more specific carbohydrate binding will be discussed in relation to the development of bio-insecticide and integrated pest management. [less ▲]

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See detailL'office de la Trinité d'Étienne de Liège (901-920) : Un témoin de l’héritage liturgique et théologique de la première réforme carolingienne à l'aube du Xe siècle
Close, Florence ULg

in Revue Belge de Philologie et d'Histoire (2008), 86(3-4), 1-21

Cet article entend souligner toute la complexité des questions inhérentes à l'histoire de l'office de la Trinité attribué à l'évêque Etienne de Liège (901-920). Il propose un retour sur les circonstances ... [more ▼]

Cet article entend souligner toute la complexité des questions inhérentes à l'histoire de l'office de la Trinité attribué à l'évêque Etienne de Liège (901-920). Il propose un retour sur les circonstances dans lesquelles cet office a vu le jour, sur la date de composition du formulaire liturgique ainsi que sur les sources d'inspiration de l'auteur-compositeur. Il s'interroge enfin sur les raisons qui ont poussé l'évêque de Liège à composer le premier office votif de l’histoire de la liturgie. [less ▲]

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See detailCurriculum on Low-cost Wastewater Treatment.
Xanthoulis, Dimitri ULg; Tilly, J.; Fonder, N. et al

Book - 1ère édition (2008)

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