References of "2007"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailIonospheric and geomagnetic conditions during periods of degraded GPS position accuracy : 2. RTK events during disturbed and quiet geomagnetic conditions
Warnant, René ULg; Kutiev, Ivan; Marinov, Pencho et al

in Advances in Space Research (2007), 39(5), 881-888

Detailed reference viewed: 33 (7 ULg)
See detailIntroduction du catalogue de l'exposition Acquisitions des Collections artistiques de l’Université de Liège 1998-2006. Peintures, dessins…
Duchesne, Jean-Patrick ULg

in Catalogue de l'exposition Acquisitions des Collections artistiques de l’Université de Liège 1998-2006. Peintures, dessins… (2007)

Detailed reference viewed: 15 (2 ULg)
Full Text
Peer Reviewed
See detailStructure modification in osteoarthritis
Bruyère, Olivier ULg; Reginster, Jean-Yves ULg

in European Musculoskeletal Review (2007)

For decades, the traditional pharmacological management of osteoarthritis (OA) has been mainly symptomatic, despite a lack of evidence of its influence on the duration of the disease and its progression ... [more ▼]

For decades, the traditional pharmacological management of osteoarthritis (OA) has been mainly symptomatic, despite a lack of evidence of its influence on the duration of the disease and its progression. However, in recent years several sets of guidelines, recommendations or points to consider have been issued by regulatory authorities or scientific groups regarding requirements for the registration of drugs to be used in the treatment of OA. The ideal outcomes currently include pain and function assessment for symptom-modifying drugs, and joint-space narrowing (JSN) assessed by plain radiography for structure-modifying compounds. Taking advantage of these more precise recommendations, several chemical entities have been carefully investigated for the management of OA. This article provides a summary of the available evidence demonstrating that some compounds can effectively interfere with the structural progression of the disease. Avocado/Soybean Unsaponifiables The unsaponifiable part of avocado (A) and soybean (S) oils (ASU) mixed in a ratio of 1:2 (A1:S2) has been investigated in the treatment of connective tissues, including in OA, for several years. A pilot randomised, double-blind, placebo-controlled trial with follow-up over two years failed to demonstrate a structural effect of ASU in 163 patients with painful hip OA.1 However, in a post hoc analysis a significant difference was detected in the subgroup with a baseline joint-space width (JSW) smaller than 2.45mm: joint space loss was halved in the treated group (-0.43±0.51mm) compared with the placebo group (-0.86±0.62mm; p=0.01). This finding suggests that ASU may have a structure-modifying effect in patients with severe hip OA. Chondroitine Sulphate Chondroitine sulphate (CS) is a major component of the extra-cellular matrix from many connective tissues, including – but not limited to – cartilage, bone, skin, ligaments and tendons. In the articular cartilage, the high content of CS in the aggrecan plays a major role in creating considerable osmotic swelling pressure, which expands the matrix and places the collagen network under tension. In a pilot double-blind study, JSW measurement on digitalised radiographs of the extended knees was used to compare the effects of CS 800mg/day and a placebo in patients with knee OA.2 There were 23 patients in each group. After one year, JSW was unchanged in the treated group but had decreased by 0.4mm in the placebo group (p<0.005). No significant difference was found for JSW at the narrowest site. The small number of patients for whom end-point values were available (12 in the placebo group and 14 in the CS group) limits the relevance of the results. Another study randomised a total of 120 patients with symptomatic knee OA into two groups receiving either 800mg CS or placebo per day for two periods of three months during one year.3 Radiological progression was assessed as a secondary outcome by automatic measurement of medial femoro-tibial JSW on weight-bearing X-rays of both knees. Radiological progression at month 12 showed significantly decreased JSW in the placebo group, with no change in the CS group. [less ▲]

Detailed reference viewed: 35 (5 ULg)
Full Text
Peer Reviewed
See detailDesigning a linear pension scheme with forced savings and wage heterogeneity
Cremer, Helmuth; De Donder, Philippe; Maldonado, Dario et al

in International Tax and Public Finance (2007)

This paper studies the optimal linear pension scheme when society consists of rational and myopic individuals. Myopic individuals have, ex ante, a strong preference for the present even though, ex post ... [more ▼]

This paper studies the optimal linear pension scheme when society consists of rational and myopic individuals. Myopic individuals have, ex ante, a strong preference for the present even though, ex post, they would regret not to have saved enough. While rational and myopic persons share the same ex post intertemporal preferences, only the rational agents make their savings and labor supply decisions according to these preferences. Individuals are also distinguished by their productivity. The social objective is “paternalistic”: the utilitarian welfare function depends on ex post utilities. We examine how the presence of myopic individuals affects both the size of the pension system and the degree of redistribution it operates, with and without liquidity constraints. The relationship between proportion of myopic individuals and characteristics of the pension system turns out to be much more complex than one would have conjectured. Neither the impact on the level of pensions nor the effect on their redistributive degree is unambiguous. Nevertheless, we show that under some plausible assumptions adding myopic individuals increases the level of pension benefits and leads to a shift from a flat or even targeted scheme to a partially contributory one. However, we also provide an example where the degree of redistribution is not a monotonic function of the proportion of myopic individuals. [less ▲]

Detailed reference viewed: 12 (0 ULg)
Full Text
Peer Reviewed
See detailQuantitative accelerated life testing of MEMS accelerometers
Bazu, Marius; Gălăţeanu, Lucian; Ilian, Virgil Emil et al

in sensors (2007), 7(11), 2846

Quantitative Accelerated Life Testing (QALT) is a solution for assessing the reliability of Micro Electro Mechanical Systems (MEMS). A procedure for QALT is shown in this paper and an attempt to assess ... [more ▼]

Quantitative Accelerated Life Testing (QALT) is a solution for assessing the reliability of Micro Electro Mechanical Systems (MEMS). A procedure for QALT is shown in this paper and an attempt to assess the reliability level for a batch of MEMS accelerometers is reported. The testing plan is application-driven and contains combined tests: thermal (high temperature) and mechanical stress. Two variants of mechanical stress are used: vibration (at a fixed frequency) and tilting. Original equipment for testing at tilting and high temperature is used. Tilting is appropriate as application-driven stress, because the tilt movement is a natural environment for devices used for automotive and aerospace applications. Also, tilting is used by MEMS accelerometers for anti-theft systems. The test results demonstrated the excellent reliability of the studied devices, the failure rate in the “worst case” being smaller than 10-7h-1. [less ▲]

Detailed reference viewed: 49 (3 ULg)
Full Text
Peer Reviewed
See detailProsodic Transfer from L1 to L2. Methodological Issues and Description
Rasier, Laurent ULg; Hiligsmann, Philippe

in Nouveaux Cahiers de Linguistique Française (2007), 28

Detailed reference viewed: 66 (4 ULg)
Full Text
Peer Reviewed
See detailSize-selected compound semiconductor quantum dots by nanoparticle conversion
Wacaser, Brent A; Dick, Kimberly A; Zanolli, Zeila ULg et al

in Nanotechnology (2007), 18(10),

We have developed a novel technology, called nanoparticle conversion, for producing compound semiconductor quantum dots (QDs) in which the dot size, surface density, position, and the materials system are ... [more ▼]

We have developed a novel technology, called nanoparticle conversion, for producing compound semiconductor quantum dots (QDs) in which the dot size, surface density, position, and the materials system are all independently controlled. Nanoparticle conversion also lends itself to spatially controlled positioning of QDs. To demonstrate this technology we report the formation of InP QDs using nanoparticle conversion. We have produced QDs on substrates of different types by converting randomly and lithographically positioned nanoparticles into compound semiconductors in a chemical vapour deposition system. Electron microscopy and atomic force microscopy measurements reveal that the morphology of these QDs is similar to that of QDs produced by other techniques. Photo- and cathodoluminescence measurements show that the converted nanoparticles exhibit properties and behaviours typical of semiconductor QDs. These include quantum confinement, free-to-bound recombination and blinking. Production of multi-component QDs like InP, GaN, and InAsP on various substrates like Si, SiO2, and sapphire show that this technology can produce a wide variety of different types of QD on different substrates with minimal need for process optimization. [less ▲]

Detailed reference viewed: 13 (0 ULg)
Full Text
See detailActualites neurochirurgicales dans le traitement des tumeurs cerebrales
Robe, Pierre ULg; Martin, Didier ULg

in Revue Médicale de Liège (2007), 62(5-6, May-Jun), 405-409

Neuronavigation is a tool for image guidance surgery. Based on the principle of the GPS, it is notably used for the ablation of brain tumors. Because of their millimetre precision, neuronavigation devices ... [more ▼]

Neuronavigation is a tool for image guidance surgery. Based on the principle of the GPS, it is notably used for the ablation of brain tumors. Because of their millimetre precision, neuronavigation devices bring more safety and effectiveness due to the ever increasing performances of medical imaging. However, neuronavigation presents a major pitfall as it uses a static support (the images acquired preoperatively) to perform a dynamic process (the surgical ablation). To preserve the performance of neuronavigation, it is mandatory to update the images during surgery. This is now achievable by interventional MRI, intra-operative ultrasound and the incorporation of fluorescent tracers by the tumor cells. These major tools, now available at Sart Tilman University Hospital of combined with state-of-the-art chemotherapy, radiotherapy and experimental protocols (including gene therapy) will undoubtedly improve the prognosis of brain tumors. [less ▲]

Detailed reference viewed: 51 (7 ULg)
Full Text
Peer Reviewed
See detailDeciphering the record of early life in Precambrian oceans using combined microscopy and microchemistry of organic-walled microfossils.
Javaux, Emmanuelle ULg; Marshall, C. P.

in Geochimica et Cosmochimica Acta (2007), 71(15), 442

Detailed reference viewed: 10 (1 ULg)
Full Text
Peer Reviewed
See detailFirst-principles study of filled and unfilled antimony skutterudites
Ghosez, Philippe ULg; Veithen, Marek

in Journal of Physics : Condensed Matter (2007), 19

Using a first-principles approach based on density-functional theory, the electronic, dielectric and dynamical properties of the skutterudites CoSb3 and TlFeCo3Sb12 are studied. In particular, the ... [more ▼]

Using a first-principles approach based on density-functional theory, the electronic, dielectric and dynamical properties of the skutterudites CoSb3 and TlFeCo3Sb12 are studied. In particular, the electron localization tensor, static and dynamic effective charges, static and optical dielectric constants and phonon dispersion curves are computed. The Born effective charges are found to be significantly larger than the static charges of the ions. Moreover, the static dielectric constant of TlFeCo3Sb12 is found to be significantly larger than that of CoSb3. The analysis of the phonon dispersion curves reveals a low-energy mode due to coupled vibrations of Tl and Sb. This mode is at the origin of a well-defined peak in the phonon density of states of TlFeCo3Sb12 and its mode effective charge is related to the increase of the dielectric constant in TlFeCo3Sb12. Our results are compared to recent experiments performed on CoSb3 and TlFeCo3Sb12, and differences between the lattice dynamics of TlFeCo3Sb12 and other filled skutterudites are highlighted. [less ▲]

Detailed reference viewed: 34 (1 ULg)
Full Text
Peer Reviewed
See detailMechanisms of active folding of the landscape (Southern Tianshan, China)
Hubert, Aurelia ULg; Suppe, J.; Gonzales-Mieres, R.

in Journal of Geophysical Research (2007), 112(10.1029/2006JB004362),

We explore the kinematic mechanisms of active large-scale folding, based on analysis of two adjacent major anticlines in Tian Shan (central Asia) that share an acceleration of shortening rate leading to ... [more ▼]

We explore the kinematic mechanisms of active large-scale folding, based on analysis of two adjacent major anticlines in Tian Shan (central Asia) that share an acceleration of shortening rate leading to topographic emergence and folded geomorphic surfaces. Their folding mechanisms are fundamentally different. Yakeng anticline is a gentle pure shear detachment fold with 1200 m of shortening and a well-constrained history of growth beginning at 5.5 Ma with an order-of-magnitude increase in shortening rate from 0.16 to 1.2–1.6 mm/yr at 0.16–0.21 Ma. The shape of the deformed topographic surface and of subsurface horizons deposited during deformation is a linearly proportional image at reduced amplitude of the deeper structure, which shows that instantaneous uplift rates have been pointwise linearly proportional to the current finite fold amplitude. In contrast, Quilitak anticline is a complex fault bend fold with uplift rates proportional to the sine of the fault dip, showing discontinuities in uplift rate across active axial surfaces. The 10- to 20-km-wide anticline is topographically emergent only in a central 5- to 7-km-wide mountainous uplift, the abrupt southern edge of which is marked by 600- to 700-m-high triangular facets that result from active folding of a pediment across an active axial surface. The giant facets are shown to form by kink band migration and record postemergence deformation since an order-of-magnitude acceleration in shortening rate from 0.6 t 4–5 mm/yr, apparently contemporaneous with Yakeng. Sections logged across the active 115-m-wide hinge zone show that recent strata provide a bed- by-bed record of fold scarp growth, which is quantitatively deciphered by fitting bed shapes to a finite width kink band migration model. [less ▲]

Detailed reference viewed: 43 (6 ULg)
Full Text
See detailRhétorique des graphiques dans les médias contemporains
Badir, Sémir ULg

in Actes du VIIIe congrès de l’AISV-IASV « Cultures du visible » (2007)

Detailed reference viewed: 11 (0 ULg)
See detailThe metabolome of developing pea seeds
Vigeolas, Hélène ULg

Conference (2007)

Detailed reference viewed: 12 (1 ULg)
See detailDEVELOPMENT OF AN INTRAPERITONEAL IMPLANT FOR THE ENDOMETRIOSIS TREATMENT
Krier, Fabrice ULg; Nizet, Dominique; Riva, Raphaël ULg et al

Conference (2007)

Detailed reference viewed: 27 (6 ULg)
Full Text
Peer Reviewed
See detailDes opérations transfrontalières de construction à la construction européenne. Exposé de synthèse
Kohl, Benoît ULg

in Tilleman, B.; Sénéchal (Eds.) Les opérations transfrontalières de construction (2007)

Detailed reference viewed: 19 (4 ULg)
See detailLa condition des personnes dans l'Union européenne
Carlier, Jean-Yves ULg

Book published by Larcier (2007)

Traite de l'ensemble de la condition des personnes dans l'Union européenne: circulation des personnes, migrations,citoyenneté, droits fondamentaux, justice, vie sociale

Detailed reference viewed: 66 (12 ULg)