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See detailEnjeux méthodologiques autour des produits forestiers non ligneux dans le cadre de la certification en Afrique Centrale
Vermeulen, Cédric ULg; Schippers, C.; Julve Larrubia, C. et al

in Bois et Forêts des Tropiques (2009), 300(2), 69-78

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See detailAnalytic Solution for Fuel-Optimal Reconfiguration in Relative Motion
Cho, Hancheol ULg; Park, Sang-Young

in Journal of Optimization Theory & Applications (2009), 141(3), 495-512

The current paper presents simple and general analytic solutions to the optimal reconfiguration of multiple satellites governed by a variety of linear dynamic equations. The calculus of variations is used ... [more ▼]

The current paper presents simple and general analytic solutions to the optimal reconfiguration of multiple satellites governed by a variety of linear dynamic equations. The calculus of variations is used to analytically find optimal trajectories and controls. Unlike what has been determined from previous research, the inverse of the fundamental matrix associated with the dynamic equations is not required for the general solution in the current study if a basic feature in the state equations is met. This feature is very common due to the fact that most relative motion equations are represented in the LVLH frame. The method suggested not only reduces the amount of calculations required, but also allows predicting the explicit form of optimal solutions in advance without having to solve the problem. It is illustrated that the optimal thrust vector is a function of the fundamental matrix of the given state equations, and other quantities, such as the cost function and the state vector during the reconfiguration, can be concisely represented as well. The analytic solutions developed in the current paper can be applied to most reconfiguration problems in linearized relative motions. Numerical simulations confirm the brevity and accuracy of the general analytic solutions developed in the current paper. [less ▲]

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See detailSi j'étais une géographie...
Schmitz, Serge ULg

in Bulletin de la Société Géographique de Liège (2009), 52

The contribution is a freeze frame on author’s vision of geography. It highlights his influences in relation to his readings and to his meetings. It suggests the “point of view” as a key concept for his ... [more ▼]

The contribution is a freeze frame on author’s vision of geography. It highlights his influences in relation to his readings and to his meetings. It suggests the “point of view” as a key concept for his geographies. [less ▲]

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See detailLe marché, les entreprises, l'Etat et le droit
Thirion, Nicolas ULg

in Journal des Tribunaux (2009)

Texte introductif d'un numéro spécial de la revue "Journal des Tribunaux" consacré aux aspects juridiques de la crise bancaire et financière de 2008

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See detailMariage et union libre : quelle égalité en droit pénal ?
Masset, Adrien ULg

in Liber Amicorum Henri-D. Bosly. Loyauté, justice et vérité. (2009)

Le Code pénal belge date de 1867 et a subi de nombreuses modifications, mais est resté sourd à de nombreuses évolutions connues dans d'autres branches du droit (couples homosexuels, cohabitation légale ... [more ▼]

Le Code pénal belge date de 1867 et a subi de nombreuses modifications, mais est resté sourd à de nombreuses évolutions connues dans d'autres branches du droit (couples homosexuels, cohabitation légale, parents naturels ou adoptants, ...) Le couple non marié a été nié au début du Code pénal pour être ensuite pris en compte petit à petit, de manière disparate. [less ▲]

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See detailNew Approach to Satellite Formation-Keeping: Exact Solution to the Full Nonlinear Problem
Cho, Hancheol ULg; Yu, Adam

in Journal of Aerospace Engineering (2009), 22(4), 445-455

This paper presents a new, simple, and exact solution to the formation keeping of satellites when the relative distance between the satellites is so large that the linearized relative equations of motion ... [more ▼]

This paper presents a new, simple, and exact solution to the formation keeping of satellites when the relative distance between the satellites is so large that the linearized relative equations of motion no longer hold. We employ a recently proposed approach, the Udwadia-Kalaba approach, which makes it possible to explicitly obtain the desired control function without making any approximations related to the nonlinearities in the underlying dynamics. We use an inertial frame of reference to describe the motion of a satellite and since no approximations are made, the results obtained apply to situations even when the distance between the satellites is arbitrarily large. The paper deals with a projected circular formation, but the methodology in this paper can be applied to any desired configuration or orbital requirements. Numerical simulations confirm the brevity and the accuracy of the analytical solution to the dynamical control problem developed herein. [less ▲]

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See detailVariétés linguistiques en concorde et en conflit : wallon et français en Wallonie
Boutier, Marie-Guy ULg

in Travaux de linguistique : revue internationale de linguistique Française (2009), 59

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See detailInhibition of radiographic progression with combination etanercept and methotrexate in patients with moderately active rheumatoid arthritis previously treated with monotherapy
van der Heijde, D.; Burmester, G.; Melo-Gomes, J. et al

in Annals of the Rheumatic Diseases (2009), 68(7), 1113-1118

OBJECTIVE: To determine the effect of changing from etanercept or methotrexate monotherapy to etanercept plus methotrexate combination therapy on radiographic progression in rheumatoid arthritis (RA ... [more ▼]

OBJECTIVE: To determine the effect of changing from etanercept or methotrexate monotherapy to etanercept plus methotrexate combination therapy on radiographic progression in rheumatoid arthritis (RA) patients. METHODS: Patients enrolled in this 1-year open-label study previously completed a 3-year blinded study in which they received methotrexate or etanercept monotherapy or the combination of both. All patients received the combination of etanercept 25 mg subcutaneously twice weekly plus oral methotrexate up to 20 mg/week. The primary radiographic endpoint was a change in modified total Sharp score (TSS), as assessed by blinded readers. RESULTS: At baseline, patients previously receiving methotrexate monotherapy (etanercept-added, n = 52) or etanercept monotherapy (methotrexate-added, n = 68) had moderate disease activity levels (mean disease activity score (DAS) of 2.6 and 2.5, respectively), whereas patients previously receiving combination therapy (n = 90) had a low disease activity level (mean DAS of 2.0). The addition of etanercept to methotrexate monotherapy resulted in a significant reduction in radiographic progression (p<0.05). Mean TSS changes in the previous year versus the current year were +1.79 versus +0.25 for the etanercept-added group (p<0.05); +0.51 versus -0.18 for the methotrexate-added group (NS) and +0.42 versus +0.24 for the combination group (NS). CONCLUSION: In these RA patients with on average moderate disease activity despite previous methotrexate monotherapy, combination treatment with etanercept and methotrexate inhibited radiographic progression and improved radiographic outcomes. These data, in conjunction with the previously published clinical data, support the use of combination therapy in RA patients with moderate disease activity. [less ▲]

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See detailInfluence of giant kelp beds (Macrocystis pyrifera) on diel cycles of pCO2 and DIC in the Sub-Antarctic coastal area
Delille, Bruno ULg; Borges, Alberto ULg; Delille, Daniel

in Estuarine Coastal & Shelf Science (2009), 81

The partial pressure of CO2 (pCO2) and dissolved inorganic carbon (DIC) were monitored in shallow coastal waters located inside and outside giant kelp beds (Macrocystis pyrifera) located in the Kerguelen ... [more ▼]

The partial pressure of CO2 (pCO2) and dissolved inorganic carbon (DIC) were monitored in shallow coastal waters located inside and outside giant kelp beds (Macrocystis pyrifera) located in the Kerguelen Archipelago (Southern Ocean). Photosynthesis and respiration by microplankton and kelp lead to marked pCO2 and DIC diel cycles. Daily variations of pCO2 and DIC are significant in the spring and summer, but absent in the winter, reflecting the seasonal cycle of biological activity in the kelp beds. If the kelp beds seem to favour the onset of phytoplankton blooms, most of the primary production inside the kelp beds is due to the kelp itself. The primary production of Macrocystis kelp beds in the Sub-Antarctic high-nutrient, low-chlorophyll (HNLC) waters off the Kerguelen Archipelago is elevated and closely linked to light availability. This production is significant from October to March and reaches its climax in December at the solar radiation maximum. [less ▲]

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See detailImpact of Public Market Information System (PMIS) on Farmers Food Marketing Decisions : Case of Benin
Kpènavoun Chogou, Sylvain; Lebailly, Philippe ULg; Adégbidi et al

Conference (2009)

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See detailGender issues in the Coastal Sandy Zone of Thua Thien Hue Province
Nguyen Dang, Hao; Lebailly, Philippe ULg; Pham Khanh, Tu

in Improving food crop productivity in the coastal sandy area of the Thua Thien Hue Province Central Vietnam : Vietnam-Belgium interuniversity project 2004-2009 (2009)

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See detailDiversité des lombriciens dans les sols de la zone cotière sableuse de la province de Thua Thien Hue (Viet Nam)
Zirbes, Lara ULg; Collin, Caroline; Dufey, Joseph E. et al

in Improving food crop productivity in the coastal sandy area of the Thua Thien Hue Province Central Vietnam : Vietnam-Belgium interuniversity project 2004-2009 (2009)

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See detailA frozen heart.
DAVIN, Laurent ULg; Legrand, Victor ULg; Legrand, Delphine

in European heart journal (2009), 30(15), 1827

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See detailDrug-eluting stents: a study of international practice.
Austin, David; Oldroyd, Keith G.; Holmes, David R. Jr et al

in American heart journal (2009), 158(4), 576-84

OBJECTIVE: We aimed to analyze trends in drug-eluting stents (DES) use in four international health care and regulatory settings. BACKGROUND: Accounts suggest a differential approach to DES ... [more ▼]

OBJECTIVE: We aimed to analyze trends in drug-eluting stents (DES) use in four international health care and regulatory settings. BACKGROUND: Accounts suggest a differential approach to DES internationally and recent reductions in use following reports of late stent thrombosis. Current studies of clinical practice are limited in their scope. METHODS: Data were pooled from angioplasty registries in Alberta (Canada), Belgium, Mayo Clinic (Rochester, MN), and Scotland (UK) that have routinely recorded consecutive patients treated since 2003. Trend analysis was performed to examine variations in DES use over time and by clinical subgroup. RESULTS: A total of 178,504 lesions treated between January 2003 and September 2007 were included. In the Mayo Clinic Registry, rapid adoption to a peak of 91% DES use for all lesions by late 2004 was observed. In contrast, Alberta and Scotland showed delayed adoption with lower peak DES use, respectively, 56% and 58% of lesions by early 2006. Adoption of DES in Belgium was more gradual and peak use of 35% lower than other registries. Reductions in DES use were seen in all data sets during 2006, although this varied in absolute and relative terms and by clinical subgroup. CONCLUSION: Adoption and use of DES showed wide variation in four countries. The determinants of use are complex, and it is likely that nonclinical factors predominate. Recent reductions in use may be as a consequence of publicity and concerns regarding late stent thrombosis. The optimum application of DES in clinical practice is unclear and is reflected in the degree of international variation demonstrated. [less ▲]

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See detailRisque de restenose et d'evenements cardiaques apres angioplastie coronaire chez le patient diabetique: reduction par des approches pharmacologiques systemiques.
Nyssen, Anne-Sophie ULg; Legrand, Victor ULg; Scheen, André ULg

in Revue Médicale de Liège (2009), 64(4), 192-8

Various systemic pharmacological approaches have been evaluated to reduce the risk of restenosis after coronary angioplasty, with or without stent, in the general population and in diabetic patients who ... [more ▼]

Various systemic pharmacological approaches have been evaluated to reduce the risk of restenosis after coronary angioplasty, with or without stent, in the general population and in diabetic patients who are at increased risk for such complication. The aim of the present paper is to describe the effects of the main pharmacological classes on the risk of restenosis, the need for new revascularisation procedures and the incidence of major clinical events (MACE: death, myocardial infarction, revascularisation). We will analyse the role of antiplatelet agents, omega-3 fatty acids, statins, anti-inflammatory compounds, immunomodulators, anti-oxidants, glitazones and, finally, classical antidiabetic drugs such as metformin and insulin. Whenever possible, we will focus our attention on the results obtained in the diabetic population. [less ▲]

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See detailA large-scale multicentre study of patient skin doses in interventional cardiology: dose-area product action levels and dose reference levels.
Bogaert, E.; Bacher, K.; Lemmens, K. et al

in The British journal of radiology (2009), 82(976), 303-12

For 318 patients in 8 different Belgian hospitals, the entire skin-dose distribution was mapped using a grid of 70 thermoluminescence dosimeters per patient, allowing an accurate determination of the ... [more ▼]

For 318 patients in 8 different Belgian hospitals, the entire skin-dose distribution was mapped using a grid of 70 thermoluminescence dosimeters per patient, allowing an accurate determination of the maximum skin dose (MSD). Dose-area product (DAP) values, exposure parameters and geometry, together with procedure, patient and cardiologist characteristics, were also registered. Procedures were divided into two groups: diagnostic procedures (coronary angiography) and therapeutic procedures (dilatation, stent, combined procedures (e.g. coronary angiography + dilatation + stent)). The mean value of the MSD was 0.310 Gy for diagnostic and 0.699 Gy for therapeutic procedures. The most critical projection for receiving the MSD is the LAO90 (left anterior oblique) geometry. In 3% of cases, the MSD exceeded the 2 Gy dose threshold for deterministic effects. Action levels in terms of DAP values as the basis for a strategy for follow-up of patients for deterministic radiation skin effects were derived from measured MSD and cumulative DAP values. Two DAP action levels are proposed. A first DAP action level of 125 Gy cm(2) corresponding to the dose threshold of 2 Gy would imply an optional radiopathological follow-up depending on the cardiologist's decision. A second DAP action level of 250 Gy cm(2) corresponding to the 3 Gy skin dose would imply a systematic follow-up. Dose reference levels - 71.3 Gy cm(2) for diagnostic and 106.0 Gy cm(2) for therapeutic procedures - were derived from the 75 percentile of the DAP distributions. As a conclusion, we propose that total DAP is registered in patient's record file, as it can serve to improve the follow-up of patients for radiation-induced skin injuries. [less ▲]

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See detailAnticorps monoclonaux en cardiologie.
Legrand, Victor ULg

in Revue medicale de Liege (2009), 64(5-6), 310-2

Clinical efficacy of antiplatelet agents administration to reduce ischemic complications has supported the concept of atherothrombosis and plaque rupture. Specifically, administration of monoclonal ... [more ▼]

Clinical efficacy of antiplatelet agents administration to reduce ischemic complications has supported the concept of atherothrombosis and plaque rupture. Specifically, administration of monoclonal antibody against platelet membrane receptor glycoprotein IIb/IIa was shown to be highly effective whenever percutaneous intervention is performed in the setting of unstable coronary syndrome. The in-hospital use of glycoprotein IIb/IIIa is unanimously recommended in these situations. [less ▲]

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See detailElevation des biomarqueurs cardiaques apres un effort physique intense.
DUGAUQUIER, Christophe ULg; Hanssen, M.; GACH, Olivier ULg et al

in Revue medicale de Liege (2009), 64(7-8), 370-2

We present the case of a patient who felt faint after a strenuous exercise. A coronary angiography was performed because of an elevated level of troponin, but it failed to demonstrat any significant ... [more ▼]

We present the case of a patient who felt faint after a strenuous exercise. A coronary angiography was performed because of an elevated level of troponin, but it failed to demonstrat any significant coronary stenosis. We discuss the effect of strenuous exercise on cardiac biomarkers. Most previous published studies involved young trained populations. The frequency of these abnormalities in older, less trained people is unknown. Moreover, the possible impact of these abnormalities on mid- or long-term outcome is a matter of debate. Seniors practising intensive sport activities should systematically be submitted to a cardiological evaluation. [less ▲]

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See detailMeeting report ESC forum on drug eluting stents, European Heart House, Nice, 27-28 September 2007.
Daemen, Joost; Simoons, Maarten L.; Wijns, William et al

in EuroIntervention : journal of EuroPCR in collaboration with the Working Group on Interventional Cardiology of the European Society of Cardiology (2009), 4(4), 427-36

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