Browsing
     by title


0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

or enter first few letters:   
OK
Full Text
Peer Reviewed
See detailFine-scale spatial pattern of Cleistogenes squarrosa population under different grazing intensities.
Liu, Z.; Li, Z.; Nijs, I. et al

in Acta Prataculturae Sinica = Caoye xuebao (2005), 14(1), 11-17

Detailed reference viewed: 14 (0 ULiège)
See detailLa finestra in De Roberto, Pirandello e Borgese
de Seta, Ilaria ULiege

Conference (2013, May 31)

Detailed reference viewed: 16 (1 ULiège)
Full Text
Peer Reviewed
See detailFinger Tapping feature extraction in Parkinson's disease using low-cost accelerometers
Stamatakis, Julien; Cremers, Julien ULiege; Macq, Benoït et al

in Proceedings 10th IEEE International Conference on Information Technology and Applications in Biomedicine (ITAB 2010) (2010)

The clinical hallmarks of Parkinson's disease (PD) are movement poverty and slowness (i.e. bradykinesia), muscle rigidity and limb tremor. The physicians usually quantify these motor disturbances by ... [more ▼]

The clinical hallmarks of Parkinson's disease (PD) are movement poverty and slowness (i.e. bradykinesia), muscle rigidity and limb tremor. The physicians usually quantify these motor disturbances by assigning a severity score according to validated but time-consuming clinical scales such as the Unified Parkinson's Disease Rating Scale (UPDRS) - part III. These clinical ratings are however prone to subjectivity and inter-rater variability. The PD medical community is therefore looking for a faster and more objective rating method. As a first step towards this goal, a tri-axial accelerometer-based system is proposed as patients are engaged in a repetitive finger tapping task, which is classically used to assess bradykinesia in the UPDRS-III. After developing the hardware, an algorithm has been developed, that automatically epoched the signal on a trial-by-trial basis and quantified, among others, movement speed, amplitude, hesitations or halts as validated by visual inspection of video recordings during the task. The results obtained in a PD patient and an healthy volunteer are presented. Preliminary results show that PD patients and healthy volunteers have different features profiles, so that a classifier could be set up to predict objective UPDRS-III scores. [less ▲]

Detailed reference viewed: 89 (17 ULiège)
Full Text
Peer Reviewed
See detailFingerprint profiling of polysaccharide kefiran extracted from kefir grains biomass
Pop, Carmen; Rotar, Ancuta M.; Salanțӑ, Liana C. et al

in Journal of Agroalimentary Processes and Technologies (2015), 21(2), 207-212

Kefiran is a water-soluble polysaccharide extracted from kefir grains biomass. The identification and quantification of kefiran monosaccharides were carried out by HPTLC after the complete acid hydrolysis ... [more ▼]

Kefiran is a water-soluble polysaccharide extracted from kefir grains biomass. The identification and quantification of kefiran monosaccharides were carried out by HPTLC after the complete acid hydrolysis of kefiran solutions. The mobile phase was a mixture of n-propanol: acetic acid: water (70:20:10, v/v). For derivatization was used p-aminobenzoic acid and o-phosphoric acid in methanol. The identified HPTLC fractions were glucose (Rf 0.71) and galactose (Rf 0.66), which indicates a high purity of the extracted kefiran. The relative concentrations of each monosaccharide identified in samples are dependent on the initial molecular weight of the polymer chain. The kefiran isolated from kefir grains grown in milk is a heteropolysaccharide which contains D-glucose and D-galactose units in a ratio of 0.94:1.1. [less ▲]

Detailed reference viewed: 40 (0 ULiège)
Full Text
Peer Reviewed
See detailFingerprint profiling of polysaccharide kefiran extracted from kefir grains by high-performance thin – layer chromatography
Pop, Carmen; Rotar, Ancuţa M.; Salanțӑ, Liana C. et al

Poster (2015, May 24)

Kefiran is a microbial and water-soluble polysaccharide obtained from the flora of kefir grains. It contains approximately equal amount of D - Glucose and D - Galactose, which could improve the viscosity ... [more ▼]

Kefiran is a microbial and water-soluble polysaccharide obtained from the flora of kefir grains. It contains approximately equal amount of D - Glucose and D - Galactose, which could improve the viscosity and viscoelastic properties of dairy products. Kefiran has some functional advantages such as antibacterial, antifungal and antitumor properties, it is often used in the food industry as a texturing and gelling agent. The matrix of kefiran can produce films with good appearance and satisfactory mechanical properties; it appears to have excellent potential as a film-forming agent and it can be an affordable alternative to synthetic packaging in food applications. [less ▲]

Detailed reference viewed: 20 (0 ULiège)
Full Text
Peer Reviewed
See detailFingerprinting and validation of a LC-DAD method for the analysis of biflavanones in Garcinia kola-based antimalarial improved traditional medicines
Tshisekedi Tshibangu, Pascal ULiege; Mutwale Kapepula, Paulin ULiege; Kabongo Kapinga, Marie Josée et al

in Journal of Pharmaceutical & Biomedical Analysis (2016), 128(2016), 382-390

African populations use traditional medicines in their initial attempt to treat a range of diseases. Nevertheless, accurate knowledge of the composition of these drugs remains a challenge in terms of ... [more ▼]

African populations use traditional medicines in their initial attempt to treat a range of diseases. Nevertheless, accurate knowledge of the composition of these drugs remains a challenge in terms of ensuring the health of population and in order to advance towards improved traditional medicines (ITMs). In this paper chromatographic methods were developed for qualitative and quantitative analyses of a per os antimalarial ITM containing Garcinia kola. The identified analytical markers were used to establish TLC and HPLC fingerprints. G. kola seeds were analysed by HPLC to confirm the identity of the extract used by the Congolese manufacturer in the ITM. The main compounds (GB1, GB2, GB-1a and Kolaflavanone) were isolated by preparative TLC and identified by UPLC–MS and NMR. For the quantification of the major compound GB1, a simple and rapid experimental design was applied to develop an LC method, and then its validation was demonstrated using the total error strategy with the accuracy profile as a decision tool. The accurate results were observed within 0.14–0.45 mg/mL range of GB1 expressed as naringenin. The extracts used in several batches of the analysed oral solutions contained GB1 (expressed as naringenin) within 2.04–2.43%. Both the fingerprints and the validated LC-DAD were found suitable for the quality control of G. kolabased raw material and finished products, respectively. [less ▲]

Detailed reference viewed: 42 (13 ULiège)
Full Text
Peer Reviewed
See detailFinishing of the Belgian Blue double-muscled cull female: influence of age and dietary energy level
Cabaraux, Jean-François ULiege

in Annales de Médecine Vétérinaire (2005), 149(Sp. Iss. SI), 1-4

Detailed reference viewed: 24 (4 ULiège)
Full Text
See detailFinit element modelling of an asynchronous motor with one broken rotor bar, comparison with the data recorded on a prototype and material aspects
Guérard, Suzanne ULiege; Gyselinck, Johan; Lecomte-Beckers, Jacqueline ULiege

in Bulletin Scientifique de l'AIM (Association des Ingénieurs Electriciens sortis de l'Institut Electrotechnique Montefiore) (2005), 1

This work studies the problem of broken rotor bars in cage induction motors. To this aim, an induction machine from WEG Motors was modelled by means of the finite element method. The motor modelled is a ... [more ▼]

This work studies the problem of broken rotor bars in cage induction motors. To this aim, an induction machine from WEG Motors was modelled by means of the finite element method. The motor modelled is a 18.5 kW four-pole induction motor with a straight rotor cage. The field distribution and stator phase currents were computed for a motor without broken rotor bars and for a motor with one broken rotor bar. The computed stator phase currents were compared to the ones recorded on motors respectively no broken rotor bar and with one broken rotor bar. The FE model and an equivalent scheme of the motor permitted to show that the resistance of the rotor cage was higher than expected, considering only the temperature effect on the conductivity of the rotor bars. A metallurgic analysis of the aluminium alloy of two rotor bars revealed the presence of a very high density of silicon and silicon oxide inclusions, as well as the presence of shrinkages and cracks, which have a negative impact on both conductivity and mechanical strength. A corrected value of the rotor bar conductivity was used in the finite element model and led to a good agreement with the experimental results. The field perturbation associated with a broken rotor bar produces a concentration of flux near the bar ahead of the broken one, considering the counterclockwise direction of rotation of the rotor. This flux concentration results in higher current values and hence in higher stresses in the bar ahead of the broken one. [less ▲]

Detailed reference viewed: 196 (6 ULiège)
See detailFinita epistola abbatis Rodulfi : le média épistolaire dans les Gesta abbatum Trudonensium (XIIe s.)
Schmidt, Kevin ULiege

Scientific conference (2015, July 01)

Detailed reference viewed: 19 (3 ULiège)
Full Text
See detailFinite difference and finite element modelling of an aquifer in Cretaceous chalk
Bolly, Pierre-Yves; Dassargues, Alain ULiege; Monjoie, Albéric ULiege

in Proceedings of the sixth International Conference on Numerical Methods in Geomechanics (1988, April)

Detailed reference viewed: 65 (11 ULiège)
Full Text
Peer Reviewed
See detailFinite Element Analysis in Bone Research: A Computational Method Relating Structure to Mechanical Function
Ruffoni, Davide ULiege; van Lenthe, Harry

in Comprehensive Biomaterials II (2017)

Detailed reference viewed: 35 (0 ULiège)
Full Text
Peer Reviewed
See detailFinite element analysis in bone research: a computational method relating structure to mechanical function
Ruffoni, Davide ULiege; van Lenthe, Harry

in Comprehensive Biomaterials (2011)

Detailed reference viewed: 30 (0 ULiège)
Full Text
Peer Reviewed
See detailFinite element analysis of continuous steel casting
Castagne, S.; Pascon, Frédéric ULiege; Miesse, G. et al

in Proceedings of the First International Conference Finite element for process analysis (2003)

In order to analyse the behaviour of steel during continuous casting and to improve the process, two complementary models of steel continuous casting using the finite element code LAGAMINE have been ... [more ▼]

In order to analyse the behaviour of steel during continuous casting and to improve the process, two complementary models of steel continuous casting using the finite element code LAGAMINE have been developed. We propose here a description of both macroscopic and mesoscopic approaches. The first one describes the whole continuous casting process, from the free surface in the mould and through the entire machine, including thermal and mechanical behaviour of the steel. The second approach focuses on the prediction of cracks and is developed at the grain scale. Results concerning the optimisation of the mould taper and the analysis of transverse cracks initiation are presented as industrial applications. [less ▲]

Detailed reference viewed: 197 (5 ULiège)
Full Text
See detailFinite element Analysis of Semi Rigid End Plate Steel Joints Under Static Loading
Bahaz, A; Amara, S; Nessi, H et al

in Proceeding of the International seminar of the apport of the simulation in technological innovation (2017, March)

The analysis of steel-framed building structures with full strength beam-to column joints is quite standard nowadays. Buildings utilizing such framing systems are widely used in design practice. However ... [more ▼]

The analysis of steel-framed building structures with full strength beam-to column joints is quite standard nowadays. Buildings utilizing such framing systems are widely used in design practice. However, there is growing recognition of significant benefits in designing joints as partial strength/semi-rigid. The design of joints within this partial strength/semi-rigid approach is becoming more and more popular. It requires however the knowledge of the full nonlinear moment-rotation behaviour of the joint, which is also a design parameter. The rotational behaviour of steel semi rigid connections can be studied using the finite element method for the following three reasons: i) such models are inexpensive and robust; ii) they allow the understanding of local effects, which are difficult to measure accurately physically; and iii) they can be used to generate extensive parametric studies. This paper presents a three-dimensional finite element model using ABAQUS software in order to simulate the structural behaviour of semi rigid steel beam to column end plate connections. Contact and sliding between different elements, bolt pre-tension, and geometric and material non-linearity, are included in this model. The model was calibrated and validated with experimental results taken from the literature and with the model proposed by Eurocode3. The results from the finite element analysis were verified by comparing the obtained moment–rotation curve of the joint. The procedure for determining the moment–rotation curve using finite element analysis is also given together with a brief explanation of how the design moment resistance and the initial rotational stiffness of the joint are obtained [less ▲]

Detailed reference viewed: 16 (2 ULiège)
Peer Reviewed
See detailA finite element analysis of spatial solitons in optical fibres
Nicolet, A.; Drouart, F.; Renversez, G. et al

in Proceedings of the XIX Symposium on Electromagnetic Phenomena in Nonlinear Circuits (EPNC 2006) (2006)

Detailed reference viewed: 5 (0 ULiège)
Full Text
Peer Reviewed
See detailA finite element analysis of spatial solitons in optical fibres
Nicolet, A.; Drouart, F.; Renversez, G. et al

in COMPEL (2007), 26(4), 1105--1113

Detailed reference viewed: 18 (2 ULiège)
Peer Reviewed
See detailA finite element analysis of spatial solitons in optical fibres
Drouart, F.; Nicolet, A.; Renversez, G. et al

in Proceedings of the 7th conference on Electrical, Transport and Optical Properties of Inhomogeneous Media (ETOPIM 7) (2006, July)

Detailed reference viewed: 11 (0 ULiège)
See detailFinite element analysis of strongly nonlinear phenomena in deployable flexible systems
Bruls, Olivier ULiege; Hoffait, Sébastien ULiege; Cugnon, Frederic et al

in 1st ESA Multibody Dynamics Workshop on Multibody Dynamics for Space Applications, Noordwijk, 2010 (2010)

Detailed reference viewed: 32 (3 ULiège)