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See detailSur les uninormes discrètes idempotentes
Couceiro, Miguel; Devillet, Jimmy UL; Marichal, Jean-Luc UL

in Couceiro, Miguel; Devillet, Jimmy; Marichal, Jean-Luc (Eds.) LFA 2017 - Rencontres francophones sur la logique floue et ses applications (2017, October)

In this paper we provide two axiomatizations of the class of idempotent discrete uninorms as conservative binary operations, where an operation is conservative if it always outputs one of its input values ... [more ▼]

In this paper we provide two axiomatizations of the class of idempotent discrete uninorms as conservative binary operations, where an operation is conservative if it always outputs one of its input values. More precisely we first show that the idempotent discrete uninorms are exactly those operations that are conservative, symmetric, and nondecreasing. Then we show that, in this characterization, symmetry can be replaced with both bisymmetry and existence of a neutral element. [less ▲]

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See detailSur Marey, ou de l’expérience de la vision photographique
Tore, Gian Maria UL

in MUCRI (2006)

Detailed reference viewed: 28 (0 UL)
See detail...sur ordre du Duce. Monsieur Guido Bagnoli
Scuto, Denis UL

in Reuter, Antoinette; Ruiz, Jean-Philippe (Eds.) Retour de Babel. Itinéraires, mémoires et citoyenneté (2007)

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See detailSur une conjecture sur les points de torsion rationnels des Jacobiennes de courbes
Leprévost, Franck UL

in Journal für die Reine und Angewandte Mathematik (1996), 473

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See detailSurdoses et inégalités sociales. Mieux comprendre les décès liés à l’usage de drogues pour mieux agir
Origer, Alain; Baumann, Michèle UL

Book published by L'harmattan - Académia (2016)

Les abus de drogues posent d’importants défis en termes sociaux, économiques, de sécurité et de santé publique. Quel est le profil socio-économique des consommateurs ? Quelles sont les différentes ... [more ▼]

Les abus de drogues posent d’importants défis en termes sociaux, économiques, de sécurité et de santé publique. Quel est le profil socio-économique des consommateurs ? Quelles sont les différentes trajectoires familiales, professionnelles et sociales d’usagers de drogues victimes de surdose fatale ? Quel est l’impact des inégalités sociales dans la survenue de surdoses impliquant des drogues illicites? Quel rôle pourrait avoir la réduction des inégalités sociales ? Quel enjeu pour les stratégies de prévention et de réduction des risques ? Un ensemble de recherches originales menées au Luxembourg, s’appuyant sur des méthodologies innovantes et une revue de littérature scientifique abondante, ont analysé les liens qui existent entre mortalités par surdose de drogues illicites et inégalités socio-économiques d’usagers suivis durant dix-huit ans. Les pistes de réflexion mises en avant dans cet ouvrage permettent de mieux saisir comment les conséquences néfastes pour l’individu, sa famille et la collectivité peuvent être en partie évitées ou réduites grâce à la mise en place de stratégies adaptées de prévention, de programmes de promotion de la santé et d’interventions psycho-socioéducatives. Cet ouvrage fournit des éléments de réflexion aux décideurs politiques, aux intervenants spécialisés en toxicomanie, aux professionnels de santé et du social pour pouvoir mieux décider et agir. [less ▲]

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See detailSurendettement et contradiction
Menetrey, Séverine UL

in Recueil Dalloz (2013)

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See detailSûreté de Fonctionnement dans un processus basé sur l'Ingénierie Dirigée par les Modèles
Cancila, Daniela; Dubois, Hubert; Adedjouma, Morayo UL

in Actes des 5emes journées sur l’Ingénierie Dirigée par les Modèles, Nancy, 25-26 mars 2009 (2009)

From the nineties, paradigm "cheaper, faster, better" is becoming a successfully paradigm to develop systems such that real-time embedded systems where safety guarantees are mandatory. Model-driven ... [more ▼]

From the nineties, paradigm "cheaper, faster, better" is becoming a successfully paradigm to develop systems such that real-time embedded systems where safety guarantees are mandatory. Model-driven engineering (MDE) approaches provide a solution to manage the increasing complexity of such systems. In this paper, we adopt a MDE approach and we study how to integrate safety requirements (and, more particularly, the dependability) from the early phases of software development. We base our investigation on three pilasters: definition of a safety metamodel compatible with UML standard profiles; definition of a software development methodology and adoption of formal methods to prove properties. In this paper we discuss our strategy and some challenges that we are faced to. MOTS-CLÉS : ingénierie dirigée par les modèles (IDM), sûreté de fonctionnement, fiabilité, métamodèles, profil UML. [less ▲]

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See detailSurface characterization of epitaxial Cu-rich CuInSe2 absorbers
Martin Lanzoni, Evandro UL; Spindler, Conrad UL; Ramirez Sanchez, Omar UL et al

in IEEE Photovoltaic Specialists Conference. Conference Record (2019, July)

We investigated the electrical properties of epitaxial Cu-rich CuInSe 2 by Kelvin probe force microscopy (KPFM) under ambient and ultra-high vacuum conditions. We first measured the sample under ambient ... [more ▼]

We investigated the electrical properties of epitaxial Cu-rich CuInSe 2 by Kelvin probe force microscopy (KPFM) under ambient and ultra-high vacuum conditions. We first measured the sample under ambient conditions before and after potassium cyanide (KCN) etching. In both cases, we do not see any substantial contrast in the surface potential data; furthermore, after the KCN etching we observed outgrowths with a height around 2nm over the sample surface. On the other hand, the KPFM measurements under ultra-high vacuum conditions show a work function dependence according to the surface orientation of the Cu-rich CuInSe 2 crystal. Our results show the possibility to increase the efficiency of epitaxial Cu-rich CuInSe 2 by growing the materials in the appropriated surface orientation where the variations in work function are reduced. [less ▲]

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See detailSurface characterization of epitaxial Cu-rich CuInSe2 absorbers
Lanzoni, Evandro; Spindler, Conrad UL; Ramirez Sanchez, Omar UL et al

in IEEE (2020)

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See detailSurface Energy Modification of Filter Media to achieve optimal Performance Characteristics in select Applications
Staudt, Johannes UL

Doctoral thesis (2020)

The surface modification of modern filter media is examined from the perspective of the energetic properties and how they influence select filtration applications. In contrast to the known mechanical ... [more ▼]

The surface modification of modern filter media is examined from the perspective of the energetic properties and how they influence select filtration applications. In contrast to the known mechanical filtration mechanisms, which are mainly applicable to the solid-liquid separations, new findings strongly suggest that direct interaction forces between the filter and the functional fluids must be taken into account in order to achieve sufficient efficiencies. Separation processes of liquid phases such as liquidliquid coalescence (LLC) or the treatment of process gases with liquid-gas coalescence (LGC) require special properties of filter media with regard to the degree of interaction with these phases. These include but are not limited to surface energy, wettability, chemical resistance, etc. The focus falls increasingly on eliminating the undesired interactions of modern filters with the fluid to be filtered. Filtration with modern fine filter media can result in undesired additive removal (ADDREM), particularly of those additives that are not fully dissolved in carrier fluid. Specifically this refers to the removal of antifoamants from gear oils, which lead to serious consequential damage of those systems. The interfacial interactions between the filter media and the functional fluids are also responsible for other effects such as the highly undesirable phenomenon of electrostatic charging/discharging (ESC/ESD) during the filtration of low-conductivity oils. In this work, the effect of the surface energy modification, in particular, is examined in greater detail. Ultimately, the surface energy of modern filter media is characterized and modified in order to optimize their performance in select applications. The work also presents some examples that illustrate the importance of surface energy in highly challenging filtration applications. [less ▲]

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See detailSurface et équipement du logement - Die Wohnsituation: Wohnfläche und Ausstattung der Wohnung
Heinz, Andreas UL; Peltier, François; Thill, Germaine et al

E-print/Working paper (2013)

In Luxembourg, a household has, on average, 129.9 m² surface of dwelling. But deviations from this average are important: with increasing household size, the surface of dwelling also increases. However ... [more ▼]

In Luxembourg, a household has, on average, 129.9 m² surface of dwelling. But deviations from this average are important: with increasing household size, the surface of dwelling also increases. However, the surface per capita is highest for single households, that is to say, people living alone (95.2 m²). For a household of six people or more, the surface available per person is only 30.1 m². It is in Esch-sur-Alzette where the dwelling surface per household is the lowest (96.0 m² on average), while in Niederanven the dwelling surface per household reaches 190.2 m². Dwelling surfaces also vary according to the nationality of the reference person of the household. Households whose reference person is British have the largest dwelling surface (158.7 m² per household on average), followed by the Dutch (153.6 m² per household) and Luxemburgers (140.9 m²). With 97.9 m² per household on average, the Portuguese live in smaller dwellings. There is also a link between the occupancy status and the surface of the dwelling. Owner households live in the most spacious dwellings (147.7 m² on average), while the surface available for tenant households is only 83.6 m². As the household size of owners is on average greater than that of renter households, per capita differences are smaller. The dwelling surface per capita of an owner household is 69.9 m², while for a tenant household, the dwelling surface per capita is 47.2 m². 97.0% of dwellings have a minimum standard of basic equipment, i.e. a bathroom, a toilet and central heating. [less ▲]

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See detailSurface Induced Order in Organic and Anorganic Materials on Nano-Structured Poly-tetrafluoroethylene.
Krüger, Jan-Kristian UL; Fischer, C.; Baller, Jörg UL et al

in Frontiers in Science and Technology, Advanced Physics Studies Press (2000),7th FSRC FERROELECTRICS-2000 (2000)

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See detailSurface modified cellulose scaffolds for tissue engineering
Courtenay, James C.; Johns, Marcus A.; Galembeck, Fernando et al

in Cellulose (2016)

We report the ability of cellulose to support cells without the use of matrix ligands on the surface of the material, thus creating a two-component system for tissue engineering of cells and materials ... [more ▼]

We report the ability of cellulose to support cells without the use of matrix ligands on the surface of the material, thus creating a two-component system for tissue engineering of cells and materials. Sheets of bacterial cellulose, grown from a culture medium containing Acetobacter organism were chemically modified with glycidyltrimethylammonium chloride or by oxidation with sodium hypochlorite in the presence of sodium bromide and 2,2,6,6-tetramethylpipiridine 1-oxyl radical to introduce a positive, or negative, charge, respectively. This modification process did not degrade the mechanical properties of the bulk material, but grafting of a positively charged moiety to the cellulose surface (cationic cellulose) increased cell attachment by 70 compared to unmodified cellulose, while negatively charged, oxidised cellulose films (anionic cellulose), showed low levels of cell attachment comparable to those seen for unmodified cellulose. Only a minimal level of cationic surface derivitisation (ca 3 degree of substitution) was required for increased cell attachment and no mediating proteins were required. Cell adhesion studies exhibited the same trends as the attachment studies, while the mean cell area and aspect ratio was highest on the cationic surfaces. Overall, we demonstrated the utility of positively charged bacterial cellulose in tissue engineering in the absence of proteins for cell attachment. [less ▲]

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See detailSurface UP-SR for an Improved Face Recognition Using Low Resolution Depth Cameras
Aouada, Djamila UL; Al Ismaeil, Kassem UL; Kedir Idris, Kedija et al

in 11th IEEE International Conference on Advanced Video and Signal-Based Surveillance (AVSS'14) (2014)

We address the limitation of low resolution depth cameras in the context of face recognition. Considering a face as a surface in 3-D, we reformulate the recently proposed Upsampling for Precise ... [more ▼]

We address the limitation of low resolution depth cameras in the context of face recognition. Considering a face as a surface in 3-D, we reformulate the recently proposed Upsampling for Precise Super–Resolution algorithm as a new approach on three dimensional points. This reformulation allows an efficient implementation, and leads to a largely enhanced 3-D face reconstruction. Moreover, combined with a dedicated face detection and representation pipeline, the proposed method provides an improved face recognition system using low resolution depth cameras. We show experimentally that this system increases the face recognition rate as compared to directly using the low resolution raw data. [less ▲]

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See detailSurface- and field-induced AFLC structures detected by dielectric spectroscopy
Lagerwall, Jan UL; Rudquist, Per; Lagerwall, Sven T. et al

in Ferroelectrics (2002)

In order to better understand which features in dielectric spectra of antiferroelectric liquid crystals (AFLCs) are due to the bulk director geometry and which are due to surface-induced structures, we ... [more ▼]

In order to better understand which features in dielectric spectra of antiferroelectric liquid crystals (AFLCs) are due to the bulk director geometry and which are due to surface-induced structures, we have performed dielectric spectroscopy measurements with simultaneous texture monitoring on two SmC*-exhibiting AFLC homologues (11- and 12F1M7), at varying cell gap. Such AFLCs are strongly affected by surface action even in fairly thick cells (d≈15µm), with heavy supercooling of the SmC* phase as the most obvious result. We show that the supercooled structure can be removed by AC-field treatment in the SmCa* phase, but some domains may stay in a polar geometry, as reflected in both texture and dielectric signature. On heating from the antiferroelectric SmC?* subphase into SmC*, meta-stable non-helical domains may form at cell gaps much larger than the helical pitch. These domains give rise to a lowfrequency dielectric absorption not seen in bulk SmC* samples. [less ▲]

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See detailSurface-induced organization of linear molecules on nanostructured polytetrafluoroethylene: Crystalline state of poly[vinylidenefluoride-trifluoroethylene].
Krüger, Jan-Kristian UL; Heydt, B.; Fischer, C. et al

in Physical Review. B, Condensed Matter and Materials Physics (1997), 55(6), 3497-3506

Highly crystalline and uniaxial-oriented polytetrafluoroethylene films, nanostructured in one dimension, were used to produce a fully crystalline, thermoreversible morphology in the ferroelectric ... [more ▼]

Highly crystalline and uniaxial-oriented polytetrafluoroethylene films, nanostructured in one dimension, were used to produce a fully crystalline, thermoreversible morphology in the ferroelectric copolymer poly[vinylidenefluoride-trifluoroethylene]. The resulting state is built up of regularly stacked lamellar crystals of about 100 nm thickness and lateral dimensions of about 6 μm. [less ▲]

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See detailSurfactant-assisted production of TbCu2 nanoparticles
de la Fuente Rodríguez; Espeso, J.I.; González, J. A. et al

in Journal of Nanoparticle Research (2017), 19

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See detailSurgery
Vögele, Claus UL

in Ayers, S.; Baum, A.; McManus, C. (Eds.) et al Cambridge Handbook of Psychology, Health & Medicine (2007)

Detailed reference viewed: 33 (0 UL)