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See detailFeasibility study of the diluted combustion in a semi-industrial boiler at low temperatures
Seggio, Giovanni; Ngendakumana, Philippe ULg; Pesenti, Barbara et al

Conference (2007, September)

The aim of this work is to assess the technical feasibility and highlight the specific problem of application of diluted (or mild) combustion in a medium scale boiler by direct gas injection. The main ... [more ▼]

The aim of this work is to assess the technical feasibility and highlight the specific problem of application of diluted (or mild) combustion in a medium scale boiler by direct gas injection. The main difficulty is due to the high geometrical confinement and heat losses of a typical boiler combustion chamber, which prevents from getting the minimum level of reactants dilution and temperature needed to reach mild combustion regime. Last year, a preliminary CFD study was performed to select a jet burner and secondary gas injector able to generate sufficient dilution and temperature of the air and gas jets before they meet in the combustion chamber of the boiler. In this work, the optimization of the position and the diameter of the gas injector has been performed. Finally, the boundary conditions and the parameters of the combustion model have been investigated. [less ▲]

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See detailFeasibility study of the diluted combustion in a semi-industrial domestic heating boiler at low temperatures
SEGGIO, Giovanni; Ngendakumana, Philippe ULg; PESENTI, Barbara et al

Conference (2006, August)

The aim of this work is to assess the technical feasibility and highlight the specific problem of application of diluted (or mild) combustion in a medium scale boiler by direct gas injection. The main ... [more ▼]

The aim of this work is to assess the technical feasibility and highlight the specific problem of application of diluted (or mild) combustion in a medium scale boiler by direct gas injection. The main difficulty is due to the high geometrical confinement and heat losses of a typical boiler combustion chamber, which prevents from getting the minimum level of reactants dilution and temperature needed to reach mild combustion regime. In this work, a preliminary CFD study has been performed to select a jet burner and secondary gas injector able to generate sufficient dilution and temperature of the air and gas jets before they meet in the combustion chamber of the boiler. [less ▲]

Detailed reference viewed: 14 (2 ULg)
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See detailFeasibility study of the modernization of Wielingen class frigates
Marchal, Jean ULg; Hage, André ULg; Dessart, Christophe et al

(2006, September 25)

The research group MRN04 has made a study of modernization of frigates of the Belgian Navy. The modernization includes fitting out of a landing area for an 11 tonnes helicopter, modifying the ... [more ▼]

The research group MRN04 has made a study of modernization of frigates of the Belgian Navy. The modernization includes fitting out of a landing area for an 11 tonnes helicopter, modifying the superstructure to solve the problems of cracks and reducing the radar cross section. The proposal of the group MRN04 consists of widening and stiffness the stern deck in order to permit landing of a helicopter, surrounding the existing superstructure by a new envelop having a better furtivity. The resistance of the helicopter landing area and the rigidity of the superstructure has been estimated by structural computations by finite elements method, which permits to choose the most adequate structure. Once the weight of the new elements is known, a new estimation of the weight is established. It permits to calculate the draft and the trim, and serves as the data to calculate the ship resistance. In fact, the speed of the frigate, as a crucial point, should not decrease too much. The ship resistance will be obtained by means of model tests in the towing tank in the University of Liège. The study shows the possibility to lay out a landing area for a helicopter of 11 tonnes as well as to decrease significantly the radar cross section, without severe reduction of the frigate speed. [less ▲]

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See detailFeast or famine: the global regulator DasR links nutrient stress to antibiotic production by Streptomyces
Rigali, Sébastien ULg; Titgemeyer, Fritz; Barends, Sharief et al

in EMBO Reports (2008), 9(7), 670-675

Members of the soil-dwelling prokaryotic genus Streptomyces produce a wealth of secondary metabolites, including antibiotics and anti-tumour agents. Their formation is intimately coupled with the onset of ... [more ▼]

Members of the soil-dwelling prokaryotic genus Streptomyces produce a wealth of secondary metabolites, including antibiotics and anti-tumour agents. Their formation is intimately coupled with the onset of development, triggered by the nutrient status of the habitat. We propose the first complete signalling cascade from nutrient sensing to development and antibiotic biosynthesis. We show that a high concentration of N-acetylglucosamine - perhaps mimicking the accumulation of N-acetylglucosamine after autolytic degradation of the vegetative mycelium - is a major checkpoint for the onset of secondary metabolism. The response is transmitted to the antibiotic pathway-specific activators via the pleiotropic transcriptional repressor DasR, whose regulon also includes all N-acetylglucosamine-related catabolic genes. The results have led to a new strategy for activating “cryptic” pathways for secondary metabolite biosynthesis, which are abundant in actinomycete genomes, thereby offering new prospects in the fight against multiply drug resistant pathogens and cancers. [less ▲]

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See detailFeature extraction for non-linear model updating
Kerschen, Gaëtan ULg; Golinval, Jean-Claude ULg

in International Conference on Structural Dynamics Modelling, Funchal, 2002 (2002, June)

Detailed reference viewed: 13 (0 ULg)
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See detailFeature Extraction from Range Imagery using Mathematical Morphology
Esselman, Thomas R.; Verly, Jacques ULg

Conference (1987, October)

Detailed reference viewed: 5 (0 ULg)
Peer Reviewed
See detailFeature Extraction in Laser-radar Range Imagery: I. Contour-based Approach
Williams, Brian D.; Verly, Jacques ULg; Esselman, Thomas R. et al

Conference (1986, November)

Peer Reviewed
See detailFeature Extraction in Laser-radar Range Imagery: II. Intensity-Cued Region-based Approach
Verly, Jacques ULg; Esselman, Thomas R.; Dudgeon, Dan E.

Conference (1986, November)

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See detailFeature extraction using auto-associative neural networks
Kerschen, Gaëtan ULg; Golinval, Jean-Claude ULg

in Smart Materials & Structures (2004), 13(1), 211-219

Modal analysis is now mature and well accepted in the design of mechanical structures. It determines the vibration mode shapes and the corresponding natural frequencies. However, the validity of modal ... [more ▼]

Modal analysis is now mature and well accepted in the design of mechanical structures. It determines the vibration mode shapes and the corresponding natural frequencies. However, the validity of modal analysis is limited to structures showing a linear behaviour. In non-linear structural dynamics, it is well known that mode shapes are no longer useful for the characterization of the dynamic response. The purpose of the present paper is to define new features which efficiently capture the dynamics of a non-linear structure. The proposed methodology takes advantage of auto-associative neural networks to compute one-dimensional curves which allow for non-linear dependences between the coordinates. Synthetic data sampled from a non-linear normal mode motion are used to illustrate the method and to develop intuition about its implementation. [less ▲]

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See detailFeature issue of digital holography and 3D imaging (DH): introduction
Hayasaki, Yoshio; Liu, Jung-Ping; Georges, Marc ULg

in Applied Optics (2015), 54(1), 1-2

The OSA Topical Meeting “Digital Holography and 3D Imaging (DH)” was held in Seattle, Washington, 13–17 July 2014. Feature issues based on the DH meeting series have been released by Applied Optics (AO ... [more ▼]

The OSA Topical Meeting “Digital Holography and 3D Imaging (DH)” was held in Seattle, Washington, 13–17 July 2014. Feature issues based on the DH meeting series have been released by Applied Optics (AO) since 2007. In this year (2014), Optics Express (OE) and AO jointly decided to have one such feature issue in each journal. The feature issue includes 27 papers and covers a large range of topics, reflecting the rapidly expanding techniques and applications of digital holography and 3D imaging. The DH meeting will continue in the future, as expected, and the next meeting is scheduled to be held on24–28 May 2015, at Shanghai Institute of Optics and Fine Mechanics, Shanghai, China. [less ▲]

Detailed reference viewed: 17 (2 ULg)
See detailFeature Selection and Extraction
Verly, Jacques ULg

Scientific conference (1998)

Detailed reference viewed: 4 (1 ULg)
See detailFeature Subset Selection in Regression with High Feature-to-Sample Ratio Datasets
Meyer, Patrick ULg

Master's dissertation (2004)

Detailed reference viewed: 14 (0 ULg)
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See detailFeatures of elastic scattering at small t at the LHC
Selyugin, O. V.; Cudell, Jean-René ULg

in AIP Conference Proceedings (2009), 1105

Detailed reference viewed: 17 (5 ULg)
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See detailFeatures of follicular dendritic cells in ovine pharyngeal tonsil: An in vivo and in vitro study in the context of scrapie pathogenesis
Toppets, Vinciane ULg; Defaweux, Valérie ULg; Piret, Joëlle ULg et al

in Veterinary Immunology and Immunopathology (2011), 141

Although the alimentary tract has been suggested as the most likely portal of entry in natural scrapie, a growing amount of data indicates that the respiratory system and more specifically the pharyngeal ... [more ▼]

Although the alimentary tract has been suggested as the most likely portal of entry in natural scrapie, a growing amount of data indicates that the respiratory system and more specifically the pharyngeal tonsils serve as a natural portal of entry for scrapie. This study describes for the first time the broad cell populations in the lymphoid compartment of pharyngeal tonsils and more specifically inside the lymphoid follicles where the scrapie agent accumulates during the period of latency. Follicular dendritic cells (FDCs), stromal cells located in the light zone of the germinal centre of lymphoid follicles, seem to be the principal causal factor in the accumulation of the infectious agent in transmissible spongiform encephalopathy (TSE) diseases. Knowing that efficient lymphoreticular prion propagation requires PrPc expression, we analysed the expression of PrPc with the mouse monoclonal antibody Pri 909 both in situ and on FDC-cluster-enriched cell suspensions. In situ, a positive staining was observed in the germinal centre of pharyngeal lymph follicles. The germinal centre labelling was due to the presence of a follicular dendritic network as revealed after immunogold staining of isolated FDC clusters. Our results suggest that the pharyngeal lymphoreticular system and more specifically PrPc expressing follicular dendritic cells could serve as a prion “reservoir” during the latency phase, thus playing a key role during the scrapie lymphoinvasion. [less ▲]

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See detailFebrile convulsions: an update
Lagae, L.; Ceulemans, B.; Misson, Jean-Paul ULg

in Acta Neurologica Belgica (2004)

Detailed reference viewed: 9 (1 ULg)
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See detailFecal calprotectin concentration in adult dogs with and without digestive troubles
Grellet, A.; Heilmann, R. M.; Feugier, A. et al

in Proceedings of the 21st ECVIM-CA Congress (2011, September)

Detailed reference viewed: 45 (0 ULg)
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See detailFecal calprotectin concentrations in adult dogs with chronic diarrhea.
Grellet A.; Heilmann R.M.; Lecoindre P. et al

in American Journal of Veterinary Research (2013), 74 (5)

Detailed reference viewed: 20 (1 ULg)
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See detailThe Fechner-Brentano controversy on the measurement of sensation
Seron, Denis ULg

in Tanasescu, Ion (Ed.) Franz Brentano's Metaphysics and Psychology (2012)

Detailed reference viewed: 5 (1 ULg)