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See detailMethod of free radical polymerization of copolymerization of (meth)acrylic and vinyl monomers under control and (co)polymer produced thereby
Lecomte, Philippe ULg; Dubois, Philippe; Jérôme, Robert ULg et al

Patent (1998)

PROBLEM TO BE SOLVED: To obtain a (co)polymer excellent in resistance to thermal decomposition by polymerizing or copolymerizing a monomer or monomers in the presence of an initiation system contg. a free ... [more ▼]

PROBLEM TO BE SOLVED: To obtain a (co)polymer excellent in resistance to thermal decomposition by polymerizing or copolymerizing a monomer or monomers in the presence of an initiation system contg. a free-radical generator other than a bromoolefin and a catalyst comprising a Pd complex having an oxidation number of 0 and represented by a specific formula. SOLUTION: A Pd salt (e.g. Pd acetate), a ligand (e.g. triphenylphosphine), and a solvent (e.g. toluene) are charged into a reactor to form a Pd complex having an oxidation number of 0 and represented by the formula: Pd(0)L<1> L<2> L<3> L<4> [wherein L<1> to L<4> are each a ligand such as PRR'R'' (wherein R, R', and R'' are each 1-14C alkyl, etc.)]. Then, a monomer (e.g. methyl methacrylate) is added to the reactor followed by the addition of a free-radical generator (e.g. CCl4 ) in a molar ratio of Pd to the generator of 0.01-100.; The contents in the reactor are heated to 40-90 deg.C and stirred for a certain time to conduct the polymn. The reaction mixture is diluted with toluene, etc., filtered, and condensed under a reduced pressure. The resultant polymer soln. is poured into methanol, etc., and the resultant precipitate is filtered, washed, and dried to give a polymer having a number average mol.wt. of 400-10,000,000g/mol and a polydispersity lower than 2. [less ▲]

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See detailThe method of proper orthogonal decomposition for dynamical characterization and order reduction of mechanical systems: An overview
Kerschen, Gaëtan ULg; Golinval, Jean-Claude ULg; Vakakis, Alexander F. et al

in Nonlinear Dynamics (2005), 41(1-3), 147-169

Modal analysis is used extensively for understanding the dynamic behavior of structures. However, a major concern for structural dynamicists is that its validity is limited to linear structures. New ... [more ▼]

Modal analysis is used extensively for understanding the dynamic behavior of structures. However, a major concern for structural dynamicists is that its validity is limited to linear structures. New developments have been proposed in order to examine nonlinear systems, among which the theory based on nonlinear normal modes is indubitably the most appealing. In this paper, a different approach is adopted, and proper orthogonal decomposition is considered. The modes extracted from the decomposition may serve two purposes, namely order reduction by projecting high-dimensional data into a lower-dimensional space and feature extraction by revealing relevant but unexpected structure hidden in the data. The utility of the method for dynamic characterization and order reduction of linear and nonlinear mechanical systems is demonstrated in this study. [less ▲]

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See detailMethod of testing for animal-derived ingredients in foods
Daube, Georges ULg; Burteau, Sophie; Nezer, Carine et al

Patent (2015)

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See detailA method to approximate the inverse of a part of the additive relationship matrix
Faux, Pierre ULg; Gengler, Nicolas ULg

in Journal of Animal Breeding & Genetics (2014)

Single-step genomic predictions need the inverse of the part of the additive relationship matrix between genotyped animals (A22). Gains in computing time are feasible with an algorithm that sets up the ... [more ▼]

Single-step genomic predictions need the inverse of the part of the additive relationship matrix between genotyped animals (A22). Gains in computing time are feasible with an algorithm that sets up the sparsity pattern of A22inv (SP algorithm) using pedigree searches, when A22inv is close to sparse. The objective of this study is to present a modification of the SP algorithm (RSP algorithm) and to assess its use in approximating A22inv when the actual A22inv is dense. The RSP algorithm sets up a restricted sparsity pattern of A22inv by limiting the pedigree search to a maximum number of searched branches. We have tested its use on four different simulated genotyped populations, from 10 000 to 75 000 genotyped animals. Accuracy of approximation is tested by replacing the actual A22inv by its approximation in an equivalent mixed model including only genotyped animals. Results show that limiting the pedigree search to four branches is enough to provide accurate approximations of A22inv, which contain approximately 80% of zeros. Computing approximations is not expensive in time but may require a great amount of memory (at maximum, approximately 81 min and approximately 55 Gb of RAM for 75 000 genotyped animals using parallel processing on four threads). [less ▲]

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See detailA method to assess global energy requirements of suburban areas at the neighbourhood scale
Marique, Anne-Françoise ULg; Reiter, Sigrid ULg

in Proceedings of the 7th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in buildings (2010, August)

This article presents the method developed to assess existing suburban neighbourhoods in order to improve their energy efficiency. It combines the use of dynamic simulation tools to evaluate energy ... [more ▼]

This article presents the method developed to assess existing suburban neighbourhoods in order to improve their energy efficiency. It combines the use of dynamic simulation tools to evaluate energy requirements for heating and lighting residential buildings, a statistical approach to assess the transport system and a simplified calculation to take also into account public lighting. The method is completed by a life-cycle analysis of buildings. An application is presented concerning the comparison of three typical suburban structures in the Walloon region of Belgium. The influence of parameters which are often underestimated, like distribution of buildings or location, on the global energy performances of suburban fabrics is tested. The results of this exercise are presented and its limits are discussed. [less ▲]

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See detailA method to assess the lysosomal residence of proteins in cultured cells.
Gasingirwa, Christine; Thirion; Costa, Chrisostome ULg et al

in Analytical Biochemistry (2008), 374(2008), 3140

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See detailA method to assess transport consumptions in suburban areas
Marique, Anne-Françoise ULg; Reiter, Sigrid ULg

Conference (2010, October 21)

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See detailA method to compare computational fluid dynamics (CFD) and multizonal dynamics simulations in buildings physics
Deltour, Jade; Van Moeseke, Geoffrey; Barbason, Mathieu ULg et al

in Proceedings of the International Conference CISBAT 2011 - Clean Tech for sustainable buildings - From Nano to Urban scale (2011, September 15)

This paper focuses on the development of a new evaluation method that combines data obtained by two different approaches: “multizonal dynamics” and “computational fluid dynamics (CFD)”. This research is a ... [more ▼]

This paper focuses on the development of a new evaluation method that combines data obtained by two different approaches: “multizonal dynamics” and “computational fluid dynamics (CFD)”. This research is a part of a project whose the main objective is to define guidelines for architects and buildings engineers. This guidelines aims at determining the adequate approach needed to evaluate the occupant thermal comfort and the building energy consumption for cooling and heating. [less ▲]

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See detailA method to compute reactive power margins with respect to voltage collapse
Van Cutsem, Thierry ULg

in IEEE Transactions on Power Systems (1991), 6

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See detailA method to correct the shape of pressure waves obtained from pulmonary fluid-filled catheters
LAMBERMONT, Bernard ULg; GERARD, P; DETRY, Olivier ULg et al

in American Journal of Respiratory & Critical Care Medicine (1997), 2

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See detailA method to determine the thermal diffusivity of foods in a can.
Bera, François ULg

in Berichte der Bundesforschungsanstalt für Ernährung (1987, February)

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See detailA method to evaluate the adaptability of photovoltaic energy on urban facades
Esclapés Jover, F.J.; Ferreiro Prieto, I.; Piera Llodrá, J. et al

in Solar Energy (2014), 105

Solar simulation and evaluation tools are essential for the design of novel energy and environmental strategies. To date, a number published studies in this area focused on the analysis of flat roofs and ... [more ▼]

Solar simulation and evaluation tools are essential for the design of novel energy and environmental strategies. To date, a number published studies in this area focused on the analysis of flat roofs and small urban areas. This paper presents a method, based on Geographic Information Systems (GIS), for defining the potential of photovoltaic solar energy over urban faßcades. The method enables the generation of 3D solar maps from two standard data sources, namely cadastral cartography and data on solar irradiance registered by the Spanish State Meteorological Agency (AEMET, for its initials in Spanish). A series of charts have been generated relating the urban and solar geometries as a result of the numerical model. The charts permit the study of the optimal parameters for the photovoltaic integration over faßcades. In addition, a study conducted over a representative urban area of Madrid is discussed as an example of the applicability of the discussed methodology. Finally, the adequacy of the Spanish Technical Edification Code (CTE, for its initials in Spanish), defining thresholds regarding the usability of photovoltaic energy, has been tested both theoretically and through the case study. Our study concludes that this regulation hinders the architectural integration of photovoltaic devices given the strict usability thresholds adopted. [less ▲]

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See detailA Method to Evaluate the Energy Consumption of Suburban Neighbourhoods
Marique, Anne-Françoise ULg; Reiter, Sigrid ULg

in HVAC&R Research (2012), 18(1-2), 88-99

Energy use in buildings, transportation systems and lighting networks represents a significant contribution to the overall energy consumption in urban and suburban areas. This paper presents a method to ... [more ▼]

Energy use in buildings, transportation systems and lighting networks represents a significant contribution to the overall energy consumption in urban and suburban areas. This paper presents a method to evaluate the energy consumption of suburban neighborhoods from these three points of view, aiming to highlight the most relevant variables linking urban form and neighborhoods energy consumptions. The method includes three parts: 1) a computational approach combining dynamic simulation tools and a database of building typologies to determine the energy consumed in heating; 2) an empirical approach to assess the energy consumed by transportation systems (four purposes of travel are taking into account: work, school, leisure and shopping); and 3) a simplified approach to calculate the energy consumed by public lighting. Results from the application of the method to three characteristic suburban neighborhoods in Belgium are presented along with a life cycle energy assessment of buildings. A sensitivity analysis was conducted to determine the effects of building and neighborhood characteristics and of building inhabitant behavior on calculated energy consumption. Results from the analysis show that building insulation, building distribution, heating system management and neighborhood location are critically important factors in the energy efficiency of suburban residential areas. [less ▲]

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See detailA method to optimize intermediate-passband photometric systems.
Royer, P.; Manfroid, Jean ULg

in Astronomy and Astrophysics. Supplement Series (1996), 119

A method is proposed to optimize the definition of existing photometric filters in order to minimize passband-matching problems. It is argued that the "improved" systems should generally yield better ... [more ▼]

A method is proposed to optimize the definition of existing photometric filters in order to minimize passband-matching problems. It is argued that the "improved" systems should generally yield better astrophysical parameters than the original ones. Although of a general scope, the method is checked on intermediate-passband filters of the Stroemgren system. [less ▲]

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See detailA Method to Reduce Cost of Mesh Deformation in Eulerian-Lagrangian Formulation
Ponthot, Jean-Philippe ULg

in Proceedings of EUROMECH 233: "Modeling of Metal Forming Processes (1988)

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See detailA method to search for large-scale concavities in asteroid shape models
Devogele, Maxime ULg; Rivet, Jean-Pierre; Tanga, Paolo et al

in Monthly Notices of the Royal Astronomical Society (2015)

Light curve inversion is proven to produce an unique model solution only under the hypothesis that the asteroid is convex. However, it was suggested that the resulting shape model, for the case of non ... [more ▼]

Light curve inversion is proven to produce an unique model solution only under the hypothesis that the asteroid is convex. However, it was suggested that the resulting shape model, for the case of non-convex asteroid, is the convex-hull of the true asteroid non-convex shape. While a convex shape is already useful to provide the overall aspect of the target, much information about real shapes is missed, as we know that asteroids are very irregular. It is a commonly accepted evidence that large flat areas sometimes appearing on shapes derived from light curves correspond to concave areas, but this information has not been further explored and exploited so far. We present in this paper a method that allows to predict the presence of concavities from such flat regions. This method analyzes the distribution of the local normals to the facets composing shape models to predict the presence of abnormally large flat surfaces. In order to test our approach, we consider here its application to a large family of synthetic asteroid shapes, and to real asteroids with large scale concavities, whose detailed shape is known by other kinds of observations (radar and spacecraft encounters). The method that we propose is proven to be reliable and capable of providing a qualitative indication of the relevance of concavities on well-constrained asteroid shapes derived from purely photometric data sets. [less ▲]

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See detailMethod validation, comparison and transfer
Rudaz, Serge; Hubert, Philippe ULg

Book published by Elsevier (2009)

This special issue of Journal of Chromatography B is devoted to validation, comparison and transfer of analytical methods. All the papers, published following the regular procedure of peer-review, are ... [more ▼]

This special issue of Journal of Chromatography B is devoted to validation, comparison and transfer of analytical methods. All the papers, published following the regular procedure of peer-review, are representative of the importance gain by methodological issues in biomedical, pharmaceutical, chemical, food and others important fields of analytical life sciences. [less ▲]

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See detailMéthode actuelle de contrôle de la cochenille pulvinaire (Eupulvinaria hydrangeae Steinweden) en Belgique
Tondeur, R.; Verstraeten, Ch.; Schiffers, Bruno ULg

in Mémoires de la Société Royale d'Entomologie de Belgique (1992), 35

Detailed reference viewed: 18 (3 ULg)