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See detailLatency and Reactivation of a Glycoprotein E Negative Bovine Herpesvirus Type 1 Vaccine: Influence of Virus Load and Effect of Specific Maternal Antibodies
Lemaire, Mylène; Schynts, Frédéric; Meyer, Gilles et al

in Vaccine (2001), 19(32), 4795-804

The effects of the vaccination of neonatal calves with a glycoprotein E (gE)-negative bovine herpesvirus type 1 (BHV-1) were investigated in naive and passively immunised calves either with the ... [more ▼]

The effects of the vaccination of neonatal calves with a glycoprotein E (gE)-negative bovine herpesvirus type 1 (BHV-1) were investigated in naive and passively immunised calves either with the recommended dose or a 5-fold concentrated one. After inoculation (PI), all calves excreted the virus vaccine except three passively immunised calves inoculated with the lower titre. No antibody response could be detected in passively immunised calves, whatever the dose used, and they all became BHV-1 seronegative and remained so after dexamethasone treatment (PDT). Nevertheless, as shown by a gamma-interferon assay, all calves that excreted the vaccine PI developed a cell-mediated immune response and a booster response was observed PDT, suggesting viral reactivation. The vaccine virus was recovered PDT from nasal secretions in two calves and BHV-1 DNA were detected in trigeminal ganglia from five calves belonging to all inoculated groups. The results show that the BHV-1 gE-negative vaccine can establish latency not only in naive but also in passively immunised neonatal calves after a single intranasal inoculation. Moreover, this study shows for the first time that the gE-negative vaccine, when used in passively immunised calves, can lead to seronegative vaccine virus carriers. [less ▲]

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See detailLatency of Pigeon herpesvirus 1 (PHV 1)
Vindevogel, Henri ULg; Pastoret, Paul-Pierre ULg; Thiry, Etienne ULg

in Wittmann, G.; Gaskell, R. M.; Rziha, H. J. (Eds.) Latent herpesvirus infections in veterinary medicine (1984)

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See detailLatent Bovine Herpesvirus 1 Infection in Calves Protected by Colostral Immunity
Lemaire, Mylène; Meyer, Gilles; Ernst, E. et al

in Veterinary Record : Journal of the British Veterinary Association (1995), 137(3), 70-1

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See detailLatent Cross-Culturalities: Wilson Harris's and Wole Soyinka's Creative Alternative Theory
Maes-Jelinek, Hena ULg

in European Journal of English Studies (1998), 2(1), 37-48

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See detailLatent infection in vivo by the varicella-zoster virus (VZV) in the rat nervous system
Sadzot-Delvaux, Catherine ULg; Merville, Marie-Paule ULg; Delrée, P. et al

in Archives Internationales de Physiologie et de Biochimie (1989), 97

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See detailLatent structure of the French Validation of the Ambivalent Sexism Inventory: Echelle de Sexisme Ambivalent
Dardenne, Benoît ULg; Delacollette, Nathalie ULg; Grégoire, Christine et al

in Année Psychologique (L') (2006), 106(2), 235-263

Glick and Fiske's (1996) Ambivalent Sexism Inventory is a measure of hostile sexism (sexist antipathy) and benevolent sexism (a subjectively positive attitude toward women). This paper proposes a French ... [more ▼]

Glick and Fiske's (1996) Ambivalent Sexism Inventory is a measure of hostile sexism (sexist antipathy) and benevolent sexism (a subjectively positive attitude toward women). This paper proposes a French version of this scale, the Echelle de Sexisme Ambivalent (ESA). Three studies on more than 1000 participants established the validity of this new scale. The first one is the application of Rasch's extended model that confirmed the psychometrical qualities of the ESA, for both male and female participants. The second study established the structural and predictive validity in a covariance analysis. This study again showed that both male and female participants displayed the same structural pattern. Next, both discriminant and convergent validity were assessed, by comparison to the Neosexism Scale (Tougas, Brown, Beaton and Joly, 1995) and the Social Dominance Scale (Sidanius and Pratto, 1999). Finally, practical and theoretical implications are discussed. [less ▲]

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See detailLater learning stages in procedural memory are impaired in children with Specific Language Impairment
Desmottes, Lise ULg; Meulemans, Thierry ULg; Maillart, Christelle ULg

in Research in Developmental Disabilities (2016)

Background According to the Procedural Deficit Hypothesis (PDH), difficulties in the procedural memory system may contribute to the language difficulties encountered by children with Specific Language ... [more ▼]

Background According to the Procedural Deficit Hypothesis (PDH), difficulties in the procedural memory system may contribute to the language difficulties encountered by children with Specific Language Impairment (SLI). Most studies investigating the PDH have used the sequence learning paradigm; however these studies have principally focused on initial sequence learning in a single practice session. Aims The present study sought to extend these investigations by assessing the consolidation stage and longer-term retention of implicit sequence-specific knowledge in 42 children with or without SLI. Methods and procedures Both groups of children completed a serial reaction time task and were tested 24 h and one week after practice. Outcomes and results Results showed that children with SLI succeeded as well as children with typical development (TD) in the early acquisition stage of the sequence learning task. However, as training blocks progressed, only TD children improved their sequence knowledge while children with SLI did not appear to evolve any more. Moreover, children with SLI showed a lack of the consolidation gains in sequence knowledge displayed by the TD children. Conclusions and implications Overall, these results were in line with the predictions of the PDH and suggest that later learning stages in procedural memory are impaired in SLI. [less ▲]

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See detailA lateral belt of cortical LGN and NuMA guides mitotic spindle movements and planar division in neuroepithelial cells
Peyre, Elise ULg; Jaouen, Florence; Saadaoui, Mehdi et al

in Journal of Cell Biology (2011)

To maintain tissue architecture, epithelial cells divide in a planar fashion, perpendicular to their main polarity axis. As the centrosome resumes an apical localization in interphase, planar spindle ... [more ▼]

To maintain tissue architecture, epithelial cells divide in a planar fashion, perpendicular to their main polarity axis. As the centrosome resumes an apical localization in interphase, planar spindle orientation is reset at each cell cycle. We used three-dimensional live imaging of GFP-labeled centrosomes to investigate the dynamics of spindle orientation in chick neuroepithelial cells. The mitotic spindle displays stereotypic movements during metaphase, with an active phase of planar orientation and a subsequent phase of planar maintenance before anaphase. We describe the localization of the NuMA and LGN proteins in a belt at the lateral cell cortex during spindle orientation. Finally, we show that the complex formed of LGN, NuMA, and of cortically located Gai subunits is necessary for spindle movements and regulates the dynamics of spindle orientation. The restricted localization of LGN and NuMA in the lateral belt is instructive for the planar alignment of the mitotic spindle, and required for its planar maintenance [less ▲]

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See detailLateral Buckling of Steel I-Beams at Elevated Temperature - Comparison between the Modelling with Beam and Shell Elements
De Souza junior, Valdenir; Franssen, Jean-Marc ULg

in Proceedings of the 3rd European Conference on Steel Structures (2002)

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See detailLateral distribution of miospores as a tool for assessment of paleogeographic distances.
Streel, Maurice ULg

in Annales de la Société Géologique de Belgique (1989), 112

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See detailLateral inhibition in visual cortex of migraine patients between attacks
Coppola, Gianluca; Parisi, Vincenzo; Di Lorenzo, Cherubino et al

in Journal of Headache & Pain (2013), 14

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See detailLateral Magnetic Near-Field Imaging of Plasmonic Nanoantennas With Increasing Complexity
Denkova, D.; Verellen, N.; Silhanek, Alejandro ULg et al

in Small : Nano Micro (2014)

The design of many promising, newly emerging classes of photonic metamaterials and subwavelength confinement structures requires detailed knowledge and understanding of the electromagnetic near-field ... [more ▼]

The design of many promising, newly emerging classes of photonic metamaterials and subwavelength confinement structures requires detailed knowledge and understanding of the electromagnetic near-field interactions between their building blocks. While the electric field distributions and, respectively, the electric interactions of different nanostructures can be routinely measured, for example, by scattering near-field microscopy, only recently experimental methods for imaging the magnetic field distributions became available. In this paper, we provide direct experimental maps of the lateral magnetic near-field distributions of variously shaped plasmonic nanoantennas by using hollow-pyramid aperture scanning near-field optical microscopy (SNOM). We study both simple plasmonic nanoresonators, such as bars, disks, rings and more complex antennas. For the studied structures, the magnetic near-field distributions of the complex resonators have been found to be a superposition of the magnetic near-fields of the individual constituting elements. These experimental results, explained and validated by numerical simulations, open new possibilities for engineering and characterization of complex plasmonic antennas with increased functionality. [less ▲]

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See detailA Lateral sensor for the alignment of two formation-flying satellites
Roose, Stéphane ULg; Stockman, Yvan ULg; Sodnik, Zoran

in Lehmann, Peter H.; Osten, Wolfgang; Albertazzi, Armando (Eds.) SPIE Proceedings Vol. 8788: (2013, May 15)

The lateral sensor is a system able to measure the lateral position between two satellites. It bridges the gap between the alignment accuracy achieved with the radio frequency metrology, and the alignment ... [more ▼]

The lateral sensor is a system able to measure the lateral position between two satellites. It bridges the gap between the alignment accuracy achieved with the radio frequency metrology, and the alignment accuracy required to start the high-precision optical metrology (fine-lateral and longitudinal sensor). This project concerns the demonstration of formation flying technologies for future European scientific and application missions of the EUROPEAN SPACE AGENCY. Technological developments enabling formation flying have already been initiated and some precursor missions already cover part of the related technologies, for example SMART-2. The lateral sensor developed at Centre Spatial de Liège (CSL) is based on a camera (CMOS detector) a telecentric lens designed at CSL, a fibre-coupled laser-diode bar and a corner cube. The fibre-coupled laser-diode bar emits a diverging beam, from the master spacecraft to a slave spacecraft. A corner cube located on the slave spacecraft sends the light back. This light is captured by the telecentric lens and camera (build by Deltatec Liège-B). A lateral shift “d” of the corner cube is seen on the camera as an image displacement. Real time centroidisation algorithms will allow tracking the image position and feed the on-board computer with this information via a RS422 link, allowing further position stabilisation. The imaging system needs to operate in a depth of field from 25 m to 250 m. Because of the large depth of operation, all lateral system performances are angular ones. The system is build to meet: • Tracking capability for a spot moving @ 0.5 arcdeg/sec • Spot detection with the sun in the field of view • Centroidisation accuracy: 0.1 camera pixels (3.5 arcsec) • Absolute calibration accuracy: 0.14 camera pixels (5 arcsec) In order to comply with these requirements, the following features were implemented : • The camera allows quick read-out of sub-windows of interest (in 1 ms). • Optimize radiometric budget and laser diode power consumption, and its related heat dissipation. • An interference filter blocks all unwanted light centred on the laser wavelength (980 nm). • The detector captures the images. An electronic unit records the images and localizes the bright spot (return image from the corner cube). • Implementation of a “slow detection mode”, which allows to discriminate sun from moving image The system is a standalone unit. Once connected to an unregulated 28V power-supply, it delivers, after spot detection, pixel coordinates to the RS422 link at a 10 Hz rate. Its average power consumption is 8W. The system can be put in a programming mode, to allow uploading settings in the FPGA. Tracking, absolute calibration, resolution and sun avoidance have been measured in a field of 10 arcdeg and the range of depth of 5 m to 80 m. The coarse lateral sensor has successfully undergone thermal qualification (40°C and -30 °C), and vibration test (high-level sinus, random and shock test in the 3–axis). Its metrology performances (centroidisation accuracy (<0.1 pixel RMS) and tracking) remained unchanged after these qualification tests. The absolute calibration is 0.3% in the interval of ±5arcdeg (11 arcsec in ±1arcdeg). [less ▲]

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See detailA LATERAL SENSOR FOR THE ALIGNMENT OF TWO FORMATION-FLYING
Roose, Stéphane ULg; Stockman, Yvan ULg

Conference (2013, May 30)

The coarse lateral sensor is a system able to measure the lateral position between two satellites. It bridges the gap between the alignment accuracy achieved with the radio frequency metrology, and the ... [more ▼]

The coarse lateral sensor is a system able to measure the lateral position between two satellites. It bridges the gap between the alignment accuracy achieved with the radio frequency metrology, and the alignment accuracy required the highprecision optical metrology (fine-lateral and longitudinal sensor). The coarse lateral sensor developed at Centre Spatial de Liège (CSL) is a standalone unit. Once connected to an unregulated 28V power-supply, it delivers, the lateral position of a corner cube retro-reflector (within an angle of 10 arcdeg and from 25 to 250 m) and tracks this position at a rate of 10 Hz. The system is operational with the sun in its fieldof- view. Real time centroidisation algorithms allow tracking the image position and feed the on-board computer with this information via a RS422 link, allowing further position stabilization. The coarse lateral sensor has successfully undergone thermal qualification (40°C and -30 °C), and vibration test (high-level sinus, random and shock test in the 3– axis). [less ▲]

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See detailLateral structures of thin films of ampholytic diblock copolymers adsorbed from dilute aqueous solution at the solid/liquid Interface
Walter, H.; Muller-Buschbaum, P.; Gutmann, J. S. et al

in Langmuir (1999), 15(20), 6984-6990

The lateral structures of dried thin films of the ampholytic diblock copolymer poly((methacrylic acid)-block-((dimethylamino)ethyl methacrylate)) adsorbed from dilute aqueous solution onto silicon ... [more ▼]

The lateral structures of dried thin films of the ampholytic diblock copolymer poly((methacrylic acid)-block-((dimethylamino)ethyl methacrylate)) adsorbed from dilute aqueous solution onto silicon substrates were investigated by scanning force microscopy (SFM) and diffuse X-ray scattering. The adsorbed amount of polymer, as a function of pH, reveals a maximum near the isoelectric point (IEP) of the polyampholyte. Different lateral structures are determined for samples adsorbed at pH values above the maximum of the adsorbed amount, as compared to the ones adsorbed at pH values below this maximum. At a pH around the IEP, the polyampholyte precipitates and the layers are formed by adsorption of flocks with sizes in the micrometer range. Lateral structures measured by SFM are similarly detected by diffuse X-ray scattering. The later technique delivers a statistical description of the lateral surface structures averaged over a larger area. The structures investigated are related to the polyampholyte structure in solution and can be explained by the interplay of the electrostatic interactions of the two oppositely charged blocks of the polyampholyte and the charged surface, as well as by the dependencies of charge densities on pH. [less ▲]

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See detailLateral Torsional Buckling of Steel I-Beams in Case of Fire - Numerical Modeling
Vila Real, P. M. M.; Franssen, Jean-Marc ULg

in Proceedings of the 1st International Structures in Fire Workshop (2000)

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See detailLateral Torsional Buckling of Steel I-Beams in Case of Fire – Numerical Modelling
Vila Real, paulo; Franssen, Jean-Marc ULg

in Franssen, Jean-Marc (Ed.) Proc. 1rst int. Structures in Fire workshop (2000, June)

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See detailLateral torsional buckling resistance of web-tapered I-beams under linear bending moments
Vandermeulen, T.; Jaspart, Jean-Pierre ULg; Boissonnade, N.

in Proceedings of the 5th International Conference on Advances in Steel Structures (2007)

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See detailLateral-torsional buckling of carbon steel and stainless steel beams subjected to combined end moments and transverse loads in case of fire
Lopes, Nuno; Vila Real, Paulo; Da Silva, Luis et al

in Kodur, Venkatesh; Franssen, Jean-Marc (Eds.) Structures in Fire. Proceedings of the Sixth International Conference (2010)

This paper presents a numerical study on the behaviour of carbon steel and stainless steel I-beams subjected to lateral-torsional buckling (LTB) in case of fire. The main motivation for this work is the ... [more ▼]

This paper presents a numerical study on the behaviour of carbon steel and stainless steel I-beams subjected to lateral-torsional buckling (LTB) in case of fire. The main motivation for this work is the fact that part 1-2 of Eurocode 3 (EC3) does not take into consideration the beneficial effect, resulting from the reduction of the plastic zones connected with non-uniform bending diagrams along the beam. Although new formulae for the LTB, that approximate better the real behaviour of steel structural elements in case of fire, have been proposed in previous works, they still do not considered the combination of end moments and transverse loads, as it is stated in part 1-1 of EC3. Therefore, in this paper numerical simulations, of steel beams with combined end moments and transverse loads, are compared with the LTB design curves of EC3, and new correction factors that improve these curves are presented. [less ▲]

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