Last 7 days
Bookmark and Share    
Full Text
See detailDesign optimization of large-size format edge-lit light guide units
Hastanin, Juriy ULg; Fleury-Frenette, Karl ULg; Lenaerts, Cedric ULg

in Proceedings of SPIE; SPIE 2016 Photonics Europe (2016, April)

In this paper, we present an original method of dot-pattern generation dedicated to design optimization of large-size format ELBUs (Edge-Lit Light Guide Unit), where the number of dots greatly exceeds the ... [more ▼]

In this paper, we present an original method of dot-pattern generation dedicated to design optimization of large-size format ELBUs (Edge-Lit Light Guide Unit), where the number of dots greatly exceeds the maximum allowable number of optical objects supported by most common ray-tracing software. In the proposed method, in order to simplify the computational problem, an original optical system is replaced by an equivalent one. Accordingly, the original dot pattern is splitted into multiple small sections. Then, these sections are replaced by equivalent cells with continuous diffusing film. After that, we adjust the TIS (Total Integrated Scatter) two-dimensional distribution over the grid of equivalent cells, using an iterative optimization procedure. Finally, the obtained optimal TIS distribution is converted into the dot size distribution by applying an appropriate conversion rule. An original semi-empirical equation dedicated to rectangular large-size LGPs (Light Guide Plate) is proposed for the initial guess of the TIS distribution. It allows significantly reducing the time needed to dot pattern optimization. [less ▲]

Detailed reference viewed: 19 (4 ULg)
Full Text
Peer Reviewed
See detailEvidence for the alignment of quasar radio polarizations with large quasar group axes
Pelgrims, Vincent ULg; Hutsemekers, Damien ULg

in Astronomy and Astrophysics (2016)

Recently, evidence has been presented for the polarization vectors from quasars to preferentially align with the axes of the large quasar groups (LQG) to which they belong. This report was based on ... [more ▼]

Recently, evidence has been presented for the polarization vectors from quasars to preferentially align with the axes of the large quasar groups (LQG) to which they belong. This report was based on observations made at optical wavelengths for two large quasar groups at redshift ~1.3. The correlation suggests that the spin axes of quasars preferentially align with their surrounding large-scale structure that is assumed to be traced by the LQGs. Here, we consider a large sample of LQGs built from the Sloan Digital Sky Survey DR7 quasar catalogue in the redshift range 1.0 -􀀀 1.8. For quasars embedded in this sample, we collected radio polarization measurements with the goal to study possible correlations between quasar polarization vectors and the major axis of their host LQGs. Assuming the radio polarization vector is perpendicular to the quasar spin axis, we found that the quasar spin axis is preferentially parallel to the LQG major axis inside LQGs that have at least 20 members. This result independently supports the observations at optical wavelengths. We additionally found that when the richness of an LQG decreases, the quasar spin axis becomes preferentially perpendicular to the LQG major axis and that no correlation is detected for quasar groups with fewer than 10 members. [less ▲]

Detailed reference viewed: 16 (4 ULg)
See detailPublic Education Expenditures, Growth and Income Inequality
Artige, Lionel ULg; Cavenaile, Laurent

E-print/Working paper (2016)

Detailed reference viewed: 37 (2 ULg)
Peer Reviewed
See detailThe Places from which I write: Reflections on the use of a Transnational Situated Feminist Objective Lens in Knowledge Production
Vivas Romero, Maria ULg

Conference (2016, April)

Through this contribution I make use of a Transnational Situated feminist objective lens (Haraway, 1988 , Fernandes, 2013 , Kaplan, 1994 ) to depict the impact of my geopolitical-locations and multi ... [more ▼]

Through this contribution I make use of a Transnational Situated feminist objective lens (Haraway, 1988 , Fernandes, 2013 , Kaplan, 1994 ) to depict the impact of my geopolitical-locations and multi-layered transnational identities on my choice of research topic, project design and definition of research object (Koobak and Thapar-Bjorkert, 2014) . In order to do so, I draw from examples of my multi-sited fieldwork with migrant domestic workers in Brussels and their family members in Peru and Colombia. Through the analysis, I first show how the use of such methodological tool during my pilot fieldwork shifted the aim of my research and led me to focus on the global inequalities experienced by ageing migrant domestic workers in the area of social protection. Secondly, I explore how the same methodological tool led me to choose the adequate intersectional theoretical perspectives and methods to properly address my research object. Thirdly, I show how these same reflections led me to plan ethical measures to produce knowledge under less asymmetrical power relations. This paper shows that my geopolitical locations and multi-layered transnational identities not only enlighten my everyday life experience but also impact the ways in which I construct and conduct my research. Moreover, it highlights the importance of acknowledging the multi-layered nature of the locations from which we write in order to hold ourselves accountable for the situated knowledge we produce. Lastly, this paper shows that reflections on the politics of locations can be useful both for minoritized subjects such as myself who challenge the hegemonic archetypes from the edges as well as for others who occupy more advantageous positions. [less ▲]

Detailed reference viewed: 8 (2 ULg)
Full Text
Peer Reviewed
See detailMass Surveillance Technology: Trading Trojan Horses
Caponetti, Lia ULg

in Strategic Trade Review (2016), (Spring 2016), 53-71

This paper challenges the effectiveness and necessity of “mass surveillance technology”(MST) on two dimensions: (a) states’ internal use of MST and the subsequent issue of violation of fundamental ... [more ▼]

This paper challenges the effectiveness and necessity of “mass surveillance technology”(MST) on two dimensions: (a) states’ internal use of MST and the subsequent issue of violation of fundamental freedoms, and (b) surveillance technology export control, especially to third countries likely to use such technology to violate human rights. Following the Snowden Datagate scandal, many States undertook inquiries and adopted measures that, in some cases, were meant to regulate the use of mass surveillance technology. The paper will: a) assess and evaluate current regulations on mass surveillance technology and its place in democratic societies, including what is at stake in terms of technology, threats, reactions to threats, and geographic extension, b) the risks linked to the use of MST on the national level by questioning the validity of counter-terrorism measures as a justification for MST use c) analyze international trade control regimes and legislation to highlighting their inadequacy in the face of the threats posed by MST, and d) map the evolution of the EU dual-use trade control system towards a human security approach with regard to human rights protection, in order to assess the capability of the system to avoid the misuse of MST. [less ▲]

Detailed reference viewed: 45 (4 ULg)
Full Text
See detailRhizosecreted proteases inhibition for the improvement of recombinant protein production in Arabidopsis thaliana
Lallemand, Jérôme ULg; Périlleux, Claire ULg; Tocquin, Pierre ULg

Poster (2016, April)

Plant-based biopharmaceuticals have gained a lot of interest in the past decade due to their reduced cost and relative safety compared to mammalian cell cultures. While the first plant-made recombinant ... [more ▼]

Plant-based biopharmaceuticals have gained a lot of interest in the past decade due to their reduced cost and relative safety compared to mammalian cell cultures. While the first plant-made recombinant proteins are now reaching the market, the production systems still need improvements to maximize their competitiveness. Optimizing production hosts requires the identification and subsequent inhibition of the most active endogenous peptidases, proteolysis being one of the main factors limiting yields. The aim of our study was to identify root-secreted proteases of Arabidopsis thaliana involved in target protein degradation (BSA) and inhibit them in vivo. Biochemical analyses identified serine proteases as the main class responsible for BSA degradation. An RT-qPCR experiment led to the choice of the serine protease gene SBT4.12 and its homologs as targets for an amiRNA-mediated silencing approach. Arabidopsis amiRNA-expressing lines showed lower levels of expression for SBT4.12 and reduced proteolytic activity in their rhizosecreted extracts. Crossing these lines with recombinant protein producing lines could lead to an improved production platform for proteins of interest. [less ▲]

Detailed reference viewed: 35 (7 ULg)
Full Text
Peer Reviewed
See detailEfficacy and safety of glucosamine sulfate in the management of osteoarthritis: Evidence from real-life setting trials and surveys.
Reginster, Jean-Yves ULg

in Osteoporosis International (2016, April), 27(supplement 1), 65

Detailed reference viewed: 30 (2 ULg)
Full Text
Peer Reviewed
See detailEfficacy and safety of hyaluronic acid in the management of osteoarthritis: Evidence from real-life setting trials and surveys.
Rannou, F.; Maheu; Reginster, Jean-Yves ULg

in Osteoporosis International (2016, April), 27(supplement 1), 66

Detailed reference viewed: 17 (4 ULg)
Full Text
Peer Reviewed
See detailPrevalence of concomitant bone and muscle wasting in patients from the SarcoPhAge study.
Locquet, Médéa ULg; Beaudart, Charlotte ULg; Reginster, Jean-Yves ULg et al

in Osteoporosis International (2016, April), 27(supplement 1), 129

Detailed reference viewed: 26 (2 ULg)
See detailAlpha-synuclein as biomarker in Parkinson’s disease: strategies for detection in CGE-LIF
Houbart, Virginie ULg; Napp, Aurore ULg; Rudaz, Serge et al

Poster (2016, April)

Detailed reference viewed: 23 (9 ULg)
Full Text
Peer Reviewed
See detailTowards the Minimization of the Levelized Energy Costs of Microgrids using both Long-term and Short-term Storage Devices
François-Lavet, Vincent ULg; Gemine, Quentin ULg; Ernst, Damien ULg et al

in Smart Grid: Networking, Data Management, and Business Models (2016)

This chapter falls within the context of the optimization of the levelized energy cost (LEC) of microgrids featuring photovoltaic panels (PV) associated with both long-term (hydrogen) and short-term ... [more ▼]

This chapter falls within the context of the optimization of the levelized energy cost (LEC) of microgrids featuring photovoltaic panels (PV) associated with both long-term (hydrogen) and short-term (batteries) storage devices. First, we propose a novel formalization of the problem of building and operating microgrids interacting with their surrounding environment. Then we show how to optimally operate a microgrid using linear programming techniques in the context where the consumption and the production are known. It appears that this optimization technique can also be used to address the problem of optimal sizing of the microgrid, for which we propose a robust approach. These contributions are illustrated in two different settings corresponding to Belgian and Spanish data. [less ▲]

Detailed reference viewed: 61 (13 ULg)
See detail20 mai 1876 : augmentation des inscriptions et extension des bâtiments
Frankignoulle, Pierre ULg

Article for general public (2016)

Detailed reference viewed: 11 (0 ULg)
Full Text
Peer Reviewed
See detailClinically Relevant Optical Properties of Bifocal, Trifocal, and Extended Depth of Focus Intraocular Lenses
Gatinel, Damien; Loicq, Jerôme ULg

in Journal of Refractive Surgery (2016), 32(4), 273-280

PURPOSE: To experimentally compare the optical performance of three types of hydrophobic intraocular lenses (IOLs): extended depth of focus, bifocal, and trifocal. METHODS: The tested IOLs were: TECNIS ... [more ▼]

PURPOSE: To experimentally compare the optical performance of three types of hydrophobic intraocular lenses (IOLs): extended depth of focus, bifocal, and trifocal. METHODS: The tested IOLs were: TECNIS ZMB00 (bifocal; Abbott Medical Optics, Abbott Park, IL), TECNIS Symfony ZXR00 (extended depth of focus; Abbott Medical Optics), and FineVision GFree hydrophobic (trifocal; PhysIOL, Liège, Belgium). Their surface topography was analyzed by optical microscopy. Modulation transfer function (MTF) and spherical aberrations were determined on optical bench for variable pupil apertures and with two cornea models (0 μm and +0.28 μm). United States Air Force target imaging was analyzed for different focal points (near, intermediate, and far). Point spread function (PSF) and halos were quantified and compared. RESULTS: The three lenses presented step-like optic topography. For a pupil size of 3 mm or greater, clearly distinctive MTF peaks were observed for all lenses: two peaks for the extended depth of focus and bifocal lenses with +1.75 and +4.00 diopters (D) addition, respectively, and three peaks for the trifocal lens with +1.75 and +3.50 addition for intermediate and near vision, respectively. The extended depth of focus and bifocal lens had slightly higher MTF at best focus with the +0.28 μm cornea model than with the 0 μm model, whereas the trifocal lens was likely to be more independent of the corneal spherical aberrations.CONCLUSIONS: It appears that the three lenses rely on light diffraction for their optical performance, presenting halos with comparable intensities. For small pupil apertures (< 3 mm), the MTF peaks for the far and intermediate focal distances of the trifocal and extended depth of focus lenses overlap, but the trifocal lens presented an additional MTF peak for the near focal points. [less ▲]

Detailed reference viewed: 26 (7 ULg)
Full Text
See detailGlobal simulation of UV atmospheric emissions on Mars
González-Galindo; López-Valverde; Forget et al

Poster (2016, April)

Detailed reference viewed: 9 (1 ULg)
Full Text
Peer Reviewed
See detailLes juristes belges et la réhabilitation du droit à la guerre du Traité de Versailles au ‘Mouvement de Monaco’ de 1933-1938
Genin, Vincent ULg

in Revue de la Faculté de Droit de l'Université de Liège (2016), 2016/1(Soixante et unième année), 155-188

Depuis la Charte des Nations Unies de 1945, l'interdiction du "recours à la force" est consacré comme règle de droit international applicable aux Etats. Toutefois, durant l'entre-deux-guerres, surtout de ... [more ▼]

Depuis la Charte des Nations Unies de 1945, l'interdiction du "recours à la force" est consacré comme règle de droit international applicable aux Etats. Toutefois, durant l'entre-deux-guerres, surtout de 1933 à 1938, la réhabilitation d'un droit à la guerre, jugée plus pragmatique par certains juristes que sa mise "hors-la-loi" par le Pacte Briand-Kellogg de 1929, connaît quelque succès. En réaction à ce qu'ils estiment être les "failles" des Pactes de la SDN et de Paris, médecins-militaires et juristes, surtout belges et français, en vue d'"humaniser la guerre" pour, selon eux, la rendre plus rare, forment un éphémère courant, oublié et devenu anachronique : le "Mouvement de Monaco". Tel est l'objet de notre étude. [less ▲]

Detailed reference viewed: 17 (2 ULg)
Full Text
Peer Reviewed
See detailInfluence of a liquid nutritional supplement on water intake in experimental Beagle dogs
Rotat, Christelle; Lhoest, Estelle; Rauw, Anaelle ULg et al

in Open Journal of Veterinary Medicine (2016), 6

The objectives were to evaluate the effects of a liquid nutritional supplement formulated for dogs on water intakes and urine output. A liquid nutritional supplement was tested by way of a cross-over ... [more ▼]

The objectives were to evaluate the effects of a liquid nutritional supplement formulated for dogs on water intakes and urine output. A liquid nutritional supplement was tested by way of a cross-over design in 8 experimental healthy Beagle dogs (4 males and 4 females, aged 9.3 years). The supplement (87 percent water, 2.7 percent protein, 2.6 percent fat, 0.4 percent crude fiber) was added to water and tested at 2 incorporation rates (50 or 70 ml/day/dog—D50 or D70) versus the control placebo (CO-water only). The dogs were kept in a controlled environment; water intakes and urine output were measured. Individual water intakes were characterised by large variations. Mean water intake increased significantly by 28 percent in dogs receiving the liquid nutritional supplement, in both genders, irrespectively of the dosage. Urine output was also increased, by 55 percent. Faeces scores remained unchanged. It was concluded that the liquid supplement increased water intake and urine output in a safe way, without increasing dramatically the daily dietary sodium chloride intake. The recommended dosage of the manufacturer—50 ml/day for dogs weighing 10 - 20 kg BW is efficient. Increasing the dosage had no advantage, nor adverse effects. Increased water intake and urine output is of interest for dogs suffering from urolithiasis. [less ▲]

Detailed reference viewed: 23 (1 ULg)
Full Text
See detailMAVEN Imaging UV Spectrograph Results on the Mars Atmosphere and Atmospheric Escape
Chaffin; Schneider; McClintock et al

Conference (2016, April)

Detailed reference viewed: 9 (1 ULg)
Full Text
See detailThe O2(a1Δ) Venus nightglow intensity: internal versus solar activity control
Soret, Lauriane ULg; Gérard, Jean-Claude ULg

Conference (2016, April)

Introduction: The O2(a1Δg) Venus nightglow emission at 1.27 μm occurs in the atmospheric region governed by the subsolar to antisolar circulation. Several studies showed that the intensity of this ... [more ▼]

Introduction: The O2(a1Δg) Venus nightglow emission at 1.27 μm occurs in the atmospheric region governed by the subsolar to antisolar circulation. Several studies showed that the intensity of this emission is highly variable on a timescale of hours. Here, we study the possible correlation between the solar flux and the O2 infrared emission using VIRTIS-VEx spectral images at 1.27 μm that has been predicted to exist by theVTGCM model calculations by Bougher and Borucki(1994). VIRTIS data: Using the entire VIRTIS-M-IR nadir database, Soret et al. (2014) generated seven statistical maps of the O2(a1Δg) emission, each containing 500 observations. The purpose was to analyze the location of the brightest spot of the emission and its variations over time. Here, we analyze the intensity of the emission over time. Several methods have been used by Soret et al., (2015) to do so (evolution of the emission maximum, evolution of the average intensity, …) Here we present the results of a new analysis using a masking technique to calculate the time evolution of the nightglow brightness. However, none of them follow the same trend over time. Solar flux data: We now focus on solar flux variations in the time of VIRTIS observations (between May 2006 and October 2008), which were collected during a deep solar minimum. We use the SOHO-CELIAS/SEM (Judge et al., 1998) EUV daily average full solar disk fluxes at 1 AU between 0.1 and 50 nm available from the Space Sciences Center of the University of Southern California. EUV0.1–50 daily average fluxes decrease from 2.6 in May 2006 to 1.9 in October 2008 at the Earth. These values have been adapted to Venus by taking into account the distance from the Sun to the planet, but also the shift in date, considering the difference in solar longitude of the two planets. Values at Venus vary from 4.4 to 3.4, which corresponds to a decrease of 10.4% of the solar flux at Venus compared to a complete solar cycle (ranging from 13.5 to 3.9) Comparison of VIRTIS and SEM datasets: The linear correlation coefficient between the solar flux and the intensity peak is found to be 0.62, which expresses the global decreasing trend for both quantities. This coefficient is not higher because internal variations of the two studied variables do not occur simultaneously. More significantly, the correlation coefficient between the solar flux and the averaged intensities is found to be 0.35, meaning that no relation-ship exists between the O2(a1Δg) brightness and the solar activity. Conclusions: Contrary to the VTGCM calculations, we do not observe here a correlation between the O2(a1Δg) brightness and the solar flux. However, VIRTIS data were acquired during a deep solar minimum and, more importantly, during a relatively stable phase of the solar activity. A high level of variability of the O2(a1Δg) emission has been detected in the same dataset from day to day though (Hueso et al., 2008; Soret et al., 2014). It thus appears that the variability is more controlled by internal than external conditions: transport appears to play a major role in the nightglow emissions than the solar activity eventually does. This conclusion is at least valid for solar minimum conditions. A space mission with global imaging capabilities over an entire solar cycle would definitely allow determining the relative role played by solar activity and internal factors. [less ▲]

Detailed reference viewed: 14 (1 ULg)
Full Text
Peer Reviewed
See detailRELMs in the Realm of Helminths
Horsnell, William G. C.; Dewals, Benjamin G ULg

in Trends in parasitology (2016)

Resistin-like molecule (RELM) proteins are essential for immunity to helminths. Recently, Chen and collaborators identified a dominant role for RELMalpha over RELMbeta in host immunity to Nippostrongylus ... [more ▼]

Resistin-like molecule (RELM) proteins are essential for immunity to helminths. Recently, Chen and collaborators identified a dominant role for RELMalpha over RELMbeta in host immunity to Nippostrongylus brasiliensis using a double knockout system. The study highlighted how important and yet divergent the contributions of these proteins are in the control of helminth infections. [less ▲]

Detailed reference viewed: 19 (3 ULg)