Study and Characterization of Inclusions in Steels obtained from ESR and Conventionally Electrical Ingot Processes

in Proceedings of the Annual Meeting of the SBM (société belge de microscopie). (1999)

The aim of this research is to establish in a quantitative and statistically justifiable way the relationship between on the one hand, the cleanliness of the steel, the amount of carbides and the ... [more ▼]

The aim of this research is to establish in a quantitative and statistically justifiable way the relationship between on the one hand, the cleanliness of the steel, the amount of carbides and the microstructure of the materials, and then on the other hand their mechanical properties in service. [less ▲]

Study and control of odour formation in piggery manure by means of automated pilots.

Poster (1991, July)

Study and modelling of the combined effect of water activity and temperature on the growth of Pichia anomala, strain K, antagonist against postharvest diseases on apple

Poster (2004)

Study by sum-frequency generation spectroscopy of a model biosensor : the biocytin-avidin complex

Poster (2003, May)

Study design and Methodology

in Law, N.; Pelgrum, W.; Plomp, T. (Eds.) Pedagogy and ICT use in Schools around the World. Findings from the IEA SITES 2006 Study (2008)

A study for efficiently solving optimisation problems with an increasing number of design variables

(2007)

Coupling optimisation algorithms to Finite Element Methods (FEM) is a very promising way to achieve optimal metal forming processes. However, many optimisation algorithms exist and it is not clear which ... [more ▼]

Coupling optimisation algorithms to Finite Element Methods (FEM) is a very promising way to achieve optimal metal forming processes. However, many optimisation algorithms exist and it is not clear which of these algorithms to use. This paper investigates the sensitivity of a Sequential Approximate Optimisation algorithm (SAO) proposed in [1-4] to an increasing number of design variables and compares it with two other algorithms: an Evolutionary Strategy (ES) and an Evolutionary version of the SAO (ESAO). In addition, it observes the influence of different Designs Of Experiments used with the SAO. It is concluded that the SAO is very capable and efficient and its combination with an ES is not beneficial. Moreover, the use of SAO with Fractional Factorial Design is the most efficient method, rather than Full Factorial Design as proposed in [1-4]. [less ▲]

Study of 2-Ethanolamine degradation

Conference (2012, January)

One major drawback of the post-combustion CO2 capture using conventional amine solvents is solvent degradation, which can be due to thermal as well as oxidative mechanisms. Degradation affects the CO2 ... [more ▼]

One major drawback of the post-combustion CO2 capture using conventional amine solvents is solvent degradation, which can be due to thermal as well as oxidative mechanisms. Degradation affects the CO2 capture process since it may cause corrosion, foaming and fouling, possibly inducing a decrease of the solvent efficiency and high additional operating costs due to solvent replacement. In order to study degradation of conventional amine solvents as well as degradation of novel solvents, a degradation test rig has been built at the University of Liège in collaboration with the company Laborelec, member of the GDF SUEZ group. Since degradation generally occurs within a few months in real plant conditions, this equipment has been designed to allow the study of different degradation mechanisms under accelerated conditions, at high temperatures (up to 140°C) and high partial pressures in oxygen and CO2 (total pressure up to 20 bar with varying gas composition). An advantage of this degradation test rig is that it can be used in batch as well as in semi-batch mode with constant gas flow. High gas-liquid contact efficiency is also ensured thanks to a mechanical agitation system combined with gas bubbling. For a typical run, 300g of aqueous amine solution (30 wt % MEA in water) is introduced into the reactor and degraded during two weeks. The degraded solutions are then analysed using high pressure liquid chromatography (HPLC) for MEA quantification and gas chromatography with flame ionization detector (GC-FID) for the characterization of degradation products. The gas phase is analysed by Fourier Transform Infra Red spectroscopy. The final objective of this work is to implement the data obtained from experimental results on the degradation test rig into an existing simulation model that has been developed based on an existing pilot plant. [less ▲]

Study of a homogeneous QSO sample: relations between the QSO and its host galaxy

in Monthly Notices of the Royal Astronomical Society (2010), 403(4), 2088-2104

ABSTRACT We analyse a sample of 69 quasi-stellar objects (QSOs) which have been randomly selected in a complete sample of 104 QSOs (R < 18,0.142 < z < 0.198, d< 10°). 60 have been observed with the NTT ... [more ▼]

ABSTRACT We analyse a sample of 69 quasi-stellar objects (QSOs) which have been randomly selected in a complete sample of 104 QSOs (R < 18,0.142 < z < 0.198, d< 10°). 60 have been observed with the NTT/SUSI2 at La Silla, through two filters in the optical band (WB 655 and V 812), and the remaining nine are taken from archive data bases. The filter V 812 contains the redshifted Hβ and forbidden [OIII] emission lines, while WB 655 covers a spectral region devoid of emission lines, thus measuring the QSO and stellar continua. The contributions of the QSO and the host are separated thanks to the MCS deconvolution algorithm, allowing a morphological classification of the host, and the computation of several parameters such as the host and nucleus absolute V magnitude, distance between the luminosity centre of the host and the QSO and colour of the host and nucleus. We define a new asymmetry coefficient, independent of any galaxy models and well suited for QSO host studies. The main results from this study are (i) 25 per cent of the total number of QSO hosts are spirals, 51 per cent are ellipticals and 60 per cent show signs of interaction, (ii) highly asymmetric systems tend to have a higher gas ionization level and (iii) elliptical hosts contain a substantial amount of ionized gas and some show off-nuclear activity. These results agree with hierarchical models merger driven evolution. [less ▲]

Study of a model low-fat salad dressing formulated with inulin.

Poster (2003, May)

Study of a novel elicitor produced by Pseudomonas putida BTP1 in the ISR on bean

Poster (2004, December 17)