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See detailSensor Data Fusion for the Measurement of Horizontal Sprayer Boom Displacement
Lebeau, Frédéric ULg; Destain, Marie-France ULg

Conference (2000, September 14)

The measurement of horizontal sprayer boom movements is an important parameter for the simulation of repartition generated by a sprayer in the dynamic environment of agricultural fields. The existing ... [more ▼]

The measurement of horizontal sprayer boom movements is an important parameter for the simulation of repartition generated by a sprayer in the dynamic environment of agricultural fields. The existing methods were unsatisfactory for diverse reasons as limited measurement length or insufficient accuracy. Two different sensor data fusion methods were evaluated as input for a model aimed at predicting longitudinal spray deposit. A combination of radar and two accelerometers measurements was found more suited than laser and radar measurements combined in predicting spray repartition. [less ▲]

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See detailCIKS, a connection to Ikappa B kinase and stress-activated protein kinase.
Leonardi, Antonio; Chariot, Alain ULg; Claudio, Estefania et al

in Proceedings of the National Academy of Sciences of the United States of America (2000), 97(19), 10494-10499

Pathogens, inflammatory signals, and stress cause acute transcriptional responses in cells. The induced expression of genes in response to these signals invariably involves transcription factors of the NF ... [more ▼]

Pathogens, inflammatory signals, and stress cause acute transcriptional responses in cells. The induced expression of genes in response to these signals invariably involves transcription factors of the NF-kappaB and AP-1/ATF families. Activation of NF-kappaB factors is thought to be mediated primarily via IkappaB kinases (IKK), whereas that of AP-1/ATF can be mediated by stress-activated protein kinases (SAPKs; also named Jun kinases or JNKs). IKKalpha and IKKbeta are two catalytic subunits of a core IKK complex that also contains the regulatory subunit NEMO (NF-kappaB essential modulator)/IKKgamma. The latter protein is essential for activation of the IKKs, but its mechanism of action is not known. Here we describe the molecular cloning of CIKS (connection to IKK and SAPK/JNK), a previously unknown protein that directly interacts with NEMO/IKKgamma in cells. When ectopically expressed, CIKS stimulates IKK and SAPK/JNK kinases and it transactivates an NF-kappaB-dependent reporter. Activation of NF-kappaB is prevented in the presence of kinase-deficient, interfering mutants of the IKKs. CIKS may help to connect upstream signaling events to IKK and SAPK/JNK modules. CIKS could coordinate the activation of two stress-induced signaling pathways, functions reminiscent of those noted for tumor necrosis factor receptor-associated factor adaptor proteins. [less ▲]

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See detailGrowth Regulation of Astrocytes and C6 Cells by Tgfbeta1: Correlation with Gap Junctions
Robe, Pierre ULg; Rogister, Bernard ULg; Merville, Marie-Paule ULg et al

in Neuroreport (2000), 11(13), 2837-41

Transforming growth factor (TGF) beta1 enhanced in vitro [3H]thymidine incorporation into C6 cells and reduced that of astrocytes in the presence of a high serum concentration. It concomitantly raised the ... [more ▼]

Transforming growth factor (TGF) beta1 enhanced in vitro [3H]thymidine incorporation into C6 cells and reduced that of astrocytes in the presence of a high serum concentration. It concomitantly raised the gap junction intercellular communication (GJIC) in normal astrocytes but reduced the coupling of C6 cells, and respectively increased or decreased the proportion of P2-phosphorylated connexin (Cx) 43 isoform in these cells. Finally, octanol, which inhibited GJIC in both cell types, increased the thymidine incorporation in C6 cells, but neither altered the proliferation of astrocytes nor their response to TGFbeta1. These data indicate that an inhibition of gap junction intercellular communication, due to an altered phosphorylation of connexin 43, may contribute to the proliferative response of C6 glioblastoma cells to TGFbeta1. [less ▲]

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See detailPaléoécologie du "marbre noir" de Denée
Mottequin, Bernard ULg

Master's dissertation (2000)

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See detailTaxation des plus-values immobilières résultant des plans d'aménagement
Delnoy, Michel ULg

in Immobilier (2000), 15

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See detailOptimal extraction of multiple overlapping spectra: a new algorithm based on the maximum entropy method
Khmil, S. V.; Surdej, Jean ULg

in Kinematika i Fizika Nebesnykh Tel Supplement (2000), 3

A general algorithm of slit spectra extraction for a system of point-like sources (e.g. multiple lensed images of the same quasar) has been developed, assuming that the point-spread function (PSF) of the ... [more ▼]

A general algorithm of slit spectra extraction for a system of point-like sources (e.g. multiple lensed images of the same quasar) has been developed, assuming that the point-spread function (PSF) of the measuring instrument and the positions of the spectra relative to the CCD frame are unknown. The main idea of the algorithm is to successively apply the maximum entropy method to each set of parameters, such as the spectra, the PSF, and the spectra positions, in order to iteratively improve their values. The algorithm uses all the a priori knowledge about the spectra (e.g. flux positivity, relative magnitudes between the components, astrometry, etc.) to compute the initial parameter sets. After careful testing, the algorithm was applied to extract the spectra of the gravitationally lensed system Q1009-0252 A & B (I[SUB]B[/SUB]/I[SUB]A[/SUB]=0.1, θ[SUB]AB[/SUB]=1.''55, 1{pxl}=0.''44, typical seeing FWHM=0.''8). [less ▲]

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See detailLensed quasars: a matter of resolution
Courbin, F.; Lidman, C.; Burud, I. et al

in The Messenger (2000), 101

Not Available

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See detailElectrochemical synthesis of conjugated polymer wires and nanotubules
Jérôme, Christine ULg; Demoustier-Champagne, Sophie; Legras, Roger et al

in Chemistry : A European Journal (2000), 6(17), 3089-3093

Two electrochemical methods designed for the synthesis of polypyrrole (PPy) wires and nanotubules are the topic of this paper. The concept that allows the morphology of PPy to be controlled is discussed ... [more ▼]

Two electrochemical methods designed for the synthesis of polypyrrole (PPy) wires and nanotubules are the topic of this paper. The concept that allows the morphology of PPy to be controlled is discussed for each method, and the performances of the two complementary techniques are compared in terms of dimension, shape and conductivity of PPy. [less ▲]

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See detailCoordinated monitoring of the eccentric O-star binary Iota Orionis: optical spectroscopy and photometry
Marchenko, Sergey V; Rauw, Grégor ULg; Antokhina, Eleonora A et al

in Monthly Notices of the Royal Astronomical Society (2000), 317

With the objective of investigating the wind-wind collision phenomenon and supporting contemporaneous X-ray observations, we have organized a large-scale, coordinated optical monitoring campaign of the ... [more ▼]

With the objective of investigating the wind-wind collision phenomenon and supporting contemporaneous X-ray observations, we have organized a large-scale, coordinated optical monitoring campaign of the massive, highly eccentric O9III+B1III binary Iota Orionis. Successfully separating the spectra of the components, we refine the orbital elements and confirm the rapid apsidal motion in the system. We also see strong interaction between the components during periastron passage and detect phase-locked variability in the spectrum of the secondary star. However, we find no unambiguous signs of the bow shock crashing on the surface of the secondary, despite the predictions of hydrodynamic simulations. Combining all available photometric data, we find rapid, phase-locked variations and model them numerically, thus restricting the orbital inclination to 50°<~i<~70°. [less ▲]

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See detailCompact star clusters of the LMC H ii region N11 C
Heydari-Malayeri, Mohammad; Royer, Pierre; Rauw, Grégor ULg et al

in Astronomy and Astrophysics (2000), 361

Based on imaging and spectroscopy obtained at the ESO NTT telescope and using an efficient image analysis algorithm, we study the core of the LMC OB association LH 13, particularly the two compact stellar ... [more ▼]

Based on imaging and spectroscopy obtained at the ESO NTT telescope and using an efficient image analysis algorithm, we study the core of the LMC OB association LH 13, particularly the two compact stellar clusters Sk-66[SUP]deg[/SUP]41, and HNT in the H ii, region N 11C. We resolve Sk-66[SUP]deg[/SUP]41, into 15 components and for the first time the HNT cluster into 70 stars, and derive photometry for the members. Moreover, from medium resolution spectroscopy we determine the spectral types for sixteen stars in N 11C. We compare the color-magnitude diagrams of the clusters with that of the field stars and discuss the cluster ages. With an age of ~ ,100 Myr, the HNT cluster appears significantly older than the very young (<= 5 Myr) Sk-66[SUP]deg[/SUP]41, starburst. We suggest that most of the `field' O-stars in the core of N 11C have actually been ejected from Sk-66[SUP]deg[/SUP]41, through dynamical interactions in the compact cluster. The properties of the Sk-66[SUP]deg[/SUP]41, and HNT clusters suggest that we are viewing different star formation regions lying at different distances along the same line of sight. Based on observations obtained at the European Southern Observatory, La Silla, Chile [less ▲]

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See detailLooking for “cognitive markers” of early Alzheimer’s disease
Ivanoiu, Adrian; Adam, Stéphane ULg; Van der Linden, Martial ULg et al

Poster (2000, September 01)

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See detailEvaluation isocinétique des muscles rotateurs externes et internes de l’épaule après transfert coracoïdien. Influence de la ténotomie du sous-scapulaire.
Willems, S.; Berger, J. P.; Houben, G. et al

in Proceedings of the 14th Congress of the European Society for Surgery of the Shoulder and the Elbow (2000, September)

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See detailIntroduction of 3D information in Urban GIS : a conceptual view
Billen, Roland ULg

Poster (2000, September)

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See detailALE Methods for Determining Stationary Solutions Metal Forming Processes
Boman, Romain ULg; Ponthot, Jean-Philippe ULg

in Oñate, E.; Bugeda, G.; Suárez, B. (Eds.) Proceedings of ECCOMAS 2000/COMPLAS VI, European Congress on Computational Methods in Applied Sciences and Engineering (2000, September)

In this paper, two efficient convection algorithms are briefly presented in order to update the values stored at the Gauss point during the Eulerian step of an Arbitrary Lagrangian Eulerian computation in ... [more ▼]

In this paper, two efficient convection algorithms are briefly presented in order to update the values stored at the Gauss point during the Eulerian step of an Arbitrary Lagrangian Eulerian computation in solid mechanics. They are based on the finite volume method and on the Streamline Upwind Petrov Galerkin method. Two applications are presented : a cold rolling simulation and a drawbead simulation. [less ▲]

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See detailArbitrary Lagrangian Eulerian Method for the Simulation of Lubricated Contact between Solids in Metal Forming Processes
Boman, Romain ULg; Ponthot, Jean-Philippe ULg

in Pietryk, Maciej; Kusiak, Jan; Majta, Janusz (Eds.) et al Metal Forming 2000 (2000, September)

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See detailRelationship between habitat structure and the mobility of brown trout in a small stream.
Ovidio, Michaël ULg; Brucy, Claire; Philippart, Jean-Claude ULg et al

Conference (2000, September)

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See detailStrychnogucines A and B, two new antiplasmodial bisindole alkaloids from Strychnos icaja
Frederich, Michel ULg; Tits, Monique ULg; Penelle, Jacques et al

Poster (2000, September)

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See detailRegrets apres sterilisation tubaire
Nervo, Patricia ULg; Bawin, L.; Foidart, Jean-Michel ULg et al

in Journal de Gynécologie, Obstétrique et Biologie de la Reproduction (2000), 29(5), 485-91

OBJECTIVE: To examine thoroughly the profile and motivations of a group of women who regretted sterilization so much that they were prepared to undergo reversal microsurgery or in vitro fertilization ... [more ▼]

OBJECTIVE: To examine thoroughly the profile and motivations of a group of women who regretted sterilization so much that they were prepared to undergo reversal microsurgery or in vitro fertilization treatment. MATERIAL: and methods. The study followed one hundred women from their first consultation for a period of 3 years in order to analyze the outcome of their initial decision. RESULTS: Analysis of the circumstances at the time of the sterilization indicate 3 main factors which later caused the women to regret the decision Three years after the initial consultation, 69% of the patients have withdrawn from further investigation and /or treatment for different reasons analyzed in this study. 17 of the patients have undergone reversal microsurgery and 14 have attempted one or more in vitro fertilization treatments. Of these 31 patients, 12 (38.7%) have given birth to at least one child. CONCLUSION: These results sufficiently prove that tubal sterilization is worthy of consideration as much by the patient as by the physician as a method of irreversible contraception despite the developments in tubal microsurgery or in medically assisted procreation. [less ▲]

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See detailUserfriendly and compact holographic camera based on photorefractive crystals. Applications in high accuracy metrology
Lemaire, Philippe; Scauflaire, Véronique; Georges, Marc ULg

in Jacquot, Pierre; Fournier, Jean-Marc (Eds.) Interferometry in Speckle Light. Theory and Applications. Proceedings of the International Conference (2000, September)

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See detailEarly Stage Results after Oesophageal Resection for Malignancy - Colon Interposition Vs. Gastric Pull-Up
Kolh, Philippe ULg; Honore, Pierre ULg; Degauque, C. et al

in European Journal of Cardio - Thoracic Surgery (2000), 18(3), 293-300

OBJECTIVE: The aims of our study were to determine if using the colon as a digestive transplant after oesophagectomy for cancer was associated with increased postoperative complications, and to assess the ... [more ▼]

OBJECTIVE: The aims of our study were to determine if using the colon as a digestive transplant after oesophagectomy for cancer was associated with increased postoperative complications, and to assess the impact of preoperative radiochemotherapy on postoperative hospital outcome. METHODS: From January 1990 to December 1998, 130 patients underwent oesophageal resection for malignancy. There were 103 males and 27 females (age: 61.3+/-11.5 years). Indications were squamous cell carcinoma in 69 patients and adenocarcinoma in 61. Preoperatively 30 patients (eight in stage IIB, 18 in stage III, and four in stage IV) received radiochemotherapy. There were 84 subtotal oesophagectomies, with anastomosis in the neck in 44 patients and at the thoracic inlet in 40, and 46 distal oesophageal resections. Digestive continuity was restored with the stomach in 92 patients (age: 63.4+/-10.2 years) and the colon in 38 (age: 52.3+/-12.8 years). With the exception of age (P<0.0001), there was no significant preoperative difference between gastric and colonic groups. RESULTS: Hospital mortality was 8.5% (11 patients), decreasing from 18.5% (before 1993) to 3.8% (since 1993). One patient (2.5%) died in the colonic graft group and ten (11%) in the gastric pull-up group (P=0.17). Postoperative complications occurred in 40 patients (31%), respectively, in ten (26%) and 30 (33%) patients after colonic and gastric transplants (P=0.48), and were pulmonary insufficiency or infection in 29 patients, anastomotic fistula in six, myocardial infarction in five, recurrent nerve palsy in four, renal insufficiency in three, and cerebrovascular accident in one. All fistulas occurred in the gastric pull-up group. The incidence of postoperative pulmonary complications was 70% (21/30 patients) in the subgroup who received preoperative radiochemotherapy, as compared to 11% (5/44 patients) in the subgroup of comparable staging, but without preoperative treatment (P<0.001). CONCLUSIONS: Colonic grafts are not associated with increased postoperative mortality or complications. Our results suggest that preoperative neoadjuvant treatment significantly increases postoperative pulmonary complications. [less ▲]

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