References of "2006"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailImpact of 2D and 3D vision on performance of novice subjects using da Vinci robotic system
Blavier, Adelaïde ULg; Gaudissart, Quentin; Cadière, Guy-Bernard et al

in Acta Chirurgica Belgica (2006), 106(6), 662-664

Purpose of the study : The aim of this study was to evaluate the impact of 3D and 2D vision on performance of novice subjects using da Vinci robotic system. Methods : 224 nurses without any surgical ... [more ▼]

Purpose of the study : The aim of this study was to evaluate the impact of 3D and 2D vision on performance of novice subjects using da Vinci robotic system. Methods : 224 nurses without any surgical experience were divided into two groups and executed a motor task with the robotic system in 2D for one group and with the robotic system in 3D for the other group. Time to perform the task was recorded. Results : Our data showed significant better time performance in 3D view (24.67 +/- 11.2) than in 2D view (40.26 +/- 17.49, P < 0.001). Conclusions : Our findings emphasized the advantage of 3D vision over 2D view in performing surgical task, encouraging the development of efficient and less expensive 3D systems in order to improve the accuracy of surgical gesture, the resident training and the operating time. [less ▲]

Detailed reference viewed: 203 (5 ULg)
Full Text
See detailTrou Al'Wesse, Belgium
Miller, Rebecca ULg; Stewart, John

in Mesolithic Miscellany (2006), 18(1), 2

Detailed reference viewed: 13 (1 ULg)
Full Text
Peer Reviewed
See detailSurgical treatment of thoraco-abdominal and low thoracic aneurysms of the aorta. One single center experience over ten years
El Arid, J.-M.; CREEMERS, Etienne ULg; Limet, Raymond ULg

in Acta Chirurgica Belgica (2006), 106(6), 669-674

This work presents the results of surgery in thoraco-abdominal aortic aneurysms (TAA) and thoracic descending aortic aneurysms (TDA) in one single center between January 1rst, 1996 and December 31, 2005 ... [more ▼]

This work presents the results of surgery in thoraco-abdominal aortic aneurysms (TAA) and thoracic descending aortic aneurysms (TDA) in one single center between January 1rst, 1996 and December 31, 2005. It concerns open surgery in 42 and endovascular procedures in ten patients. Forty two patients (11 TDA and 31 TAA (4 type I, 12 type II, 6 type III and 9 type IV)) define the open surgery series. Twenty six patients were operated on elective basis and 16 patients in emergency condition. Surgical correction was made under partial cardio-pulmonary bypass (PCPB) in 70% of cases via femoral vessels; most significant intercostal arteries were reimplanted and cerebro-spinal fluid (CSF) drainage used in half of the cases. Operative mortality was zero in the elective group (0/26) and attained 19% in the emergent group (3/16). Mortality was linked to cerebrovascular accidents (CVA) in two cases and post-pump left lung hemorrhagic intarction in one case. The paraplegia accounts 2/26 in the elective group and one in the emergent group (1/16). That is 7.1% in both groups. At the end of five years, survival is 66% in elective group and 74% in the emergency group. Ten patients (5 TDA and 5 TAA (2 type I, 3 type III)) were treated endovascularly. Operative mortality and postoperative paraplegia were nil. [less ▲]

Detailed reference viewed: 17 (1 ULg)
Full Text
Peer Reviewed
See detailThe in vitro influences of neurotensin on the motility characteristics of human U373 glioblastoma cells
Servotte, S.; Camby, I.; Debeir, O. et al

in Neuropathology & Applied Neurobiology (2006), 32(6), 575-584

Astrocytic tumours are associated with dismal prognoses due to their pronounced ability to diffusely invade the brain parenchyma. Various neuropeptides, including gastrin, are able to modulate tumour ... [more ▼]

Astrocytic tumours are associated with dismal prognoses due to their pronounced ability to diffusely invade the brain parenchyma. Various neuropeptides, including gastrin, are able to modulate tumour astrocyte migration. While neurotensin has been shown to influence the proliferation of glioma cells and the migratory ability of a large set of other cell types, its role in glioma cell migration has never been investigated. Neurotensin-induced modifications to the motility features of human U373 glioblastoma cells therefore constitute the topic of the present study. We evidenced that three subtypes of neurotensin receptors (NTR1, NTR2 and NTR3) are expressed in U373 glioblastoma cells, at least as far as their mRNAs are concerned. Treating U373 tumour cells with 10 nM neurotensin markedly modified the morphological patterns of these cells and also profoundly altered the organization of their actin cytoskeletons. Pull-down assays revealed that neurotensin induced the activation in U373 cells of both Rac1 and Cdc42 but not RhoA. Scratch wound assays evidenced that neurotensin (0.1 and 10 nM) very significantly inhibited wound colonization by U373 cells cultured in the absence of serum. In addition, quantitative phase-contrast videomicroscopy analyses showed that neurotensin decreases the motility levels of U373 glioblastoma cells when these cells are cultured on plastic. In sharp contrast, neurotensin stimulates the motility of U373 cells when they are cultured on laminin, which is a pro-adhesive extracellular matrix component ubiquitously secreted by glioma cells. Our data thus strongly suggest that, in addition to gastrin, neurotensin is a neuropeptide capable of modulating tumour astrocyte migration into the brain parenchyma. [less ▲]

Detailed reference viewed: 17 (0 ULg)
Full Text
Peer Reviewed
See detailTRANSMISSION ET RÉSISTANCE DES PRIONS : LA PRATIQUE DE LA MÉDECINE DENTAIRE EN SERA T-ELLEAFFECTÉE ?
Elmoualij, Benaïssa ULg; Heinen, Ernst ULg; Zorzi, Willy ULg et al

in Journal de l'Ordre des Dentistes du Québec (2006), 43(9), 461-467

Detailed reference viewed: 11 (3 ULg)
Full Text
See detailSound field modeling in architectural acoustics using a diffusion equation
Picaut, Judicaël; Valeau, Vincent; Billon, Alexis ULg et al

Conference (2006, December)

A numerical approach is proposed to model the reverberated sound field in rooms. The model is based on the numerical implementation of a diffusion model enabling spatial variations of the sound energy ... [more ▼]

A numerical approach is proposed to model the reverberated sound field in rooms. The model is based on the numerical implementation of a diffusion model enabling spatial variations of the sound energy within a room, unlike the statistical theory. The proposed method allows to take into account most of complex phenomena encountered in room acoustics, like mixed reflections on walls (diffuse and specular), low and high absorption on walls, atmospheric attenuation, fitted zones. Moreover, the model can be applied to complex geometries, like multiple coupled rooms of different sizes. In this paper, the model and its numerical implementation are first detailed. Then, an application is proposed for a complex geometry defined by multiple coupled rooms with fitting objects, including low and high absorption on walls, in terms of sound level and reverberation times. The main interest of the model is that such approach requires less computational time in comparison with common approaches like ray-tracing simulations. [less ▲]

Detailed reference viewed: 32 (1 ULg)
Full Text
Peer Reviewed
See detailMolecular cloning and functional expression of a new aphid isoprenyl diphosphate synthase
Vandermoten, Sophie ULg; Beliveau, C.; Sen, S. et al

in Archives Internationales de Physiologie et de Biochimie (2006, December), 190

Detailed reference viewed: 21 (11 ULg)
Full Text
Peer Reviewed
See detailExperimental tests for the Babu-Zee two-loop model of Majorana neutrino masses
Aristizabal Sierra, Diego ULg; Hirsch, M.

in Journal of High Energy Physics [=JHEP] (2006), 0612

The smallness of the observed neutrino masses might have a radiative origin. Here we revisit a specific two-loop model of neutrino mass, independently proposed by Babu and Zee. We point out that current ... [more ▼]

The smallness of the observed neutrino masses might have a radiative origin. Here we revisit a specific two-loop model of neutrino mass, independently proposed by Babu and Zee. We point out that current constraints from neutrino data can be used to derive strict lower limits on the branching ratio of flavour changing charged lepton decays, such as μ→eγ. Non-observation of Br(μ→eγ) at the level of 10^(−13) would rule out singly charged scalar masses smaller than 590 GeV (5.04 TeV) in case of normal (inverse) neutrino mass hierarchy. Conversely, decay branching ratios of the non-standard scalars of the model can be fixed by the measured neutrino angles (and mass scale). Thus, if the scalars of the model are light enough to be produced at the LHC or ILC, measuring their decay properties would serve as a direct test of the model as the origin of neutrino masses. [less ▲]

Detailed reference viewed: 5 (0 ULg)
Peer Reviewed
See detailLe portrait dans Daguerréotypes d'Agnès Varda
Van Cauwenberge, Geneviève ULg

Conference (2006, December)

Detailed reference viewed: 51 (3 ULg)
Peer Reviewed
See detailBuilding EnCOrE : Encyclopédie de Chimie Organique Electronique
Colaux, Catherine ULg; Seleck, Caroline; Henry, Julie et al

Poster (2006, December)

Detailed reference viewed: 23 (0 ULg)
Full Text
See detailGeneralized Shape And Topology Optimization: Recent Developments And Application Perspectives To Automotive Structures
Duysinx, Pierre ULg; Van Miegroet, Laurent ULg; Remouchamps, Alain et al

in New Advances in Body Engineering - Lightweight design, passive safety, pedestrian protection, and numerical optimization (2006, December)

More than 15 years after the seminal work by Bendsøe and Kikuchi, topology optimization of structures has taken advantage of my research efforts and has now become a commercial available tool (e.g ... [more ▼]

More than 15 years after the seminal work by Bendsøe and Kikuchi, topology optimization of structures has taken advantage of my research efforts and has now become a commercial available tool (e.g. OptiStruct by Altair, Topol by Samtech, etc.). These software tools are daily used in automotive industry and provide engineers with a rational tool for preliminary design of efficient structural components. This paper presents the status of available topology optimization tools and introduces the recent developments that extend their capabilities in order to handle stress constraints, manufacturing constraints, etc. The communication also presents a novel approach of generalized shape optimization that has been introduced to circumvent the difficulties of parametric shape optimization and to complement topology optimization. The approach is based on the eXtended Finite Element Method (XFEM) and the Level Set Description of the geometry. The Level Set description introduces smooth curve descriptions and allows modifying the connectivity of the wholes. The XFEM works with a fixed mesh as in topology optimization, which makes the method very convenient for engineers. Thus the novel approach is likely to bring the next future evolution of structural optimization. Impressive capabilities of this new generation approach will be demonstrated. Application examples from automotive and aerospace engineering will illustrate the different possibilities offered by two approaches. [less ▲]

Detailed reference viewed: 86 (4 ULg)
Full Text
See detail"Er war ein Verlorener". Géza von Cziffra erinnert sich an Joseph Roth
Küpper, Achim ULg

in Literaturkritik.de (2006)

Detailed reference viewed: 1 (1 ULg)
Full Text
Peer Reviewed
See detailTreating gliomas with glucocorticoids: from bedside to bench
Piette, Caroline ULg; Munaut, Carine ULg; Foidart, Jean-Michel ULg et al

in Acta Neuropathologica (2006), 112(6), 651-664

Glucocorticoids are used in the treatment of gliomas to decrease tumour-associated oedema and to reduce the risk of acute encephalopathy associated with radiotherapy. However, the mechanisms by which ... [more ▼]

Glucocorticoids are used in the treatment of gliomas to decrease tumour-associated oedema and to reduce the risk of acute encephalopathy associated with radiotherapy. However, the mechanisms by which glucocorticoids work are still largely unknown. In this paper, we survey the experimental and clinical evidence for the effects of glucocorticoids on tumour cell proliferation, apoptosis and sensitivity to chemotherapy, angiogenesis and vascular permeability. We then review current guidelines on the choice of molecule, dose and duration of glucocorticoid treatment for gliomas. [less ▲]

Detailed reference viewed: 36 (6 ULg)
Full Text
Peer Reviewed
See detailFunctional morphology of the sonic apparatus in Ophidion barbatum (Teleostei, Ophidiidae)
Parmentier, Eric ULg; Fontenelle, N.; Fine, M. L. et al

in Journal of Morphology (2006), 267(12), 1461-1468

Most soniferous fishes producing sounds with their swimbladder utilize relatively simple mechanisms: contraction and relaxation of a unique pair of sonic muscles cause rapid movements of the swimbladder ... [more ▼]

Most soniferous fishes producing sounds with their swimbladder utilize relatively simple mechanisms: contraction and relaxation of a unique pair of sonic muscles cause rapid movements of the swimbladder resulting in sound production. Here we describe the sonic mechanism for Ophidion barbatum, which includes three pairs of sonic muscles, highly transformed vertebral centra and ribs, a neural arch that pivots and a swimbladder whose anterior end is modified into a bony structure, the rocker bone. The ventral and intermediate muscles cause the rocker bone to swivel inward, compressing the swimbladder, and this action is antagonized by the dorsal muscle. Unlike other sonic systems in which the muscle contraction rate determines sound fundamental frequency, we hypothesize that slow contraction of these antagonistic muscles produces a series of cycles of swimbladder vibration. [less ▲]

Detailed reference viewed: 33 (6 ULg)
Full Text
Peer Reviewed
See detailHigh prevalence of pituitary adenomas: A cross-sectional study in the province of Liege, Belgium
Daly, Adrian ULg; Rixhon, M.; Adam, Christelle et al

in Journal of Clinical Endocrinology and Metabolism (2006), 91(12), 4769-4775

Context: Prevalence data are important for assessing the burden of disease on the health care system; data on pituitary adenoma prevalence are very scarce. Objective: The objective of the study was to ... [more ▼]

Context: Prevalence data are important for assessing the burden of disease on the health care system; data on pituitary adenoma prevalence are very scarce. Objective: The objective of the study was to measure the prevalence of clinically relevant pituitary adenomas in a well-defined population. Design: This was a cross-sectional, intensive, case-finding study performed in three regions of the province of Liège, Belgium, to measure pituitary adenoma prevalence as of September 30, 2005. Setting: The study was conducted in specialist and general medical practitioner patient populations, referral hospitals, and investigational centers. Methods: Three demographically and geographically distinct districts of the province of Liège were delineated precisely using postal codes. Medical practitioners in these districts were recruited, and patients with pituitary adenomas under their care were identified. Diagnoses were confirmed after retrieval of clinical, hormonal, radiological, and pathological data; full demographic and therapeutic follow-up data were collected in all cases. Results: Sixty-eight patients with clinically relevant pituitary adenomas were identified in a population of 71,972 individuals; the mean (± SD) prevalence was 94 ± 19.3 cases per 100,000 population (95% confidence interval, 72.2 to 115.8). The group was 67.6% female and had a mean age at diagnosis of 40.3 yr; 42.6% had macroadenomas and 55.9% underwent surgery. Prolactinomas comprised 66% of the group, with the rest having nonsecreting tumors (14.7%), somatotropinomas (13.2%), or Cushing’s disease (5.9%); 20.6% had hypopituitarism. Conclusion: The prevalence of pituitary adenomas in the study population (one case in 1064 individuals) was more than 3.5–5 times that previously reported. This increased prevalence may have important implications when prioritizing funding for research and treatment of pituitary adenomas. [less ▲]

Detailed reference viewed: 27 (8 ULg)
Full Text
See detailTranscriptional regulation of the mouse doublecortin gene in differentiating neurons
Plumier, Jean-Christophe ULg; Muller, Marc ULg; Rogister, Bernard ULg et al

in International Journal of Developmental Neuroscience (2006, December), 24(8), 535

Detailed reference viewed: 56 (25 ULg)
Full Text
Peer Reviewed
See detailA contribution to the audit of an air-conditioning system: modeling, simulation and benchmarking
Adam, Christophe; Andre, Philippe ULg; Hannay, Cleide et al

(2006, December)

This paper intends to show how benchmarks can help in the audit of a HVAC system and how these benchmarks can be generated. The work presented is part of the European “AUDITAC” project. How can an auditor ... [more ▼]

This paper intends to show how benchmarks can help in the audit of a HVAC system and how these benchmarks can be generated. The work presented is part of the European “AUDITAC” project. How can an auditor declare that a given HVAC is “consuming too much”? He can’t make any judgment, if not having some reference, i.e. some “benchmarks” available. Focus is given here to cooling regime, but even then, heating cannot be forgotten (for example, the remaining heating demand can be satisfied thanks some recovery on the condensers of the chillers). The dramatic question is: what should be the consumption(s) for such a building, in such a climate, with such occupancy, such internal loads and such actual indoor environment? Better than to look for a (very hypothetical) global weather index, similar to heating degree-days, it seems more rational to run a simulation model on a few thousands of hours, corresponding to one (or to several) cooling season(s). Current performances of simulation tools make this approach very expedient. The climate can then be considered as it is, without any simplification. The main simplification is still welcome on the system (building + HVAC) side, in order to get calculation robustness, easy understanding and easy parameter identification. In this perspective, the building has to be subdivided in a very limited number of zones and only a few components of the HVAC system have to be included in the simulation model, with as simple as possible control strategies. [less ▲]

Detailed reference viewed: 49 (5 ULg)