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See detailDevelopment and numerical validation of a 2-scale computational model to study the mechanical behavior of nanocrystalline metals
Péron, Vincent ULg

Doctoral thesis (2014)

This work aims at predicting the mechanical behavior of nanocrystalline structure using a 2-scale approach. Molecular simulations using the quasicontinuum method (QC) are performed to obtain the ... [more ▼]

This work aims at predicting the mechanical behavior of nanocrystalline structure using a 2-scale approach. Molecular simulations using the quasicontinuum method (QC) are performed to obtain the mechanical responses of the grain-boundaries and grains at the nanoscale. A finite element model is then calibrated using these atomistic results. This 2-scale model accounts for intergranular and intragranular plasticity, can predict the intergranular failure, and is able to study large structures. [less ▲]

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See detailDevelopment and optimisation of methods to synthesise sol-gel nanoparticles and sol-gel core-shell nanoparticles to produce nanosensors
De Bleye, Charlotte ULg

Master's dissertation (2011)

The aim of this project was to synthesise nanosensors. It can be defined as an inert, biofriendly matrix in which sensing molecules are entrapped, allowing determination of analytes concentration. Two ... [more ▼]

The aim of this project was to synthesise nanosensors. It can be defined as an inert, biofriendly matrix in which sensing molecules are entrapped, allowing determination of analytes concentration. Two types of nanosensors were synthesised according to the Stöber method and characterised by a scanning electron microscope and a CPS disc centrifuge. The nanosensors were calibrated with succes using a fluorimeter. [less ▲]

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See detailDevelopment and optimization of a TD-GC/MS methodology for detection and quantifi cation of furan released in air using of an experimental design.
Alsafra, Zouheir ULg; Scholl, Georges ULg; Romain et al

Poster (2016, July 07)

In the aim of understanding the way in which human is exposed to furan present in the air of an occupational area, an analytical method of Thermal desorption-gas chromatography/Mass spectrometry (TD-GC/MS ... [more ▼]

In the aim of understanding the way in which human is exposed to furan present in the air of an occupational area, an analytical method of Thermal desorption-gas chromatography/Mass spectrometry (TD-GC/MS) has been developed and optimized using a Plackett–Burman experimental design. This method was then used to study the phenomena of diffusion of furan released in air from a contamination source. This source of furan is simply a coffee machine located in a closed controlled room. Results show that furan concentration increases quickly over time after turning on the coffee machine until reaching a maxima. Then it starts to decrease slowly. On the other hand, concentration of furan seems to be identical everywhere in the conditioned room in each moment. [less ▲]

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See detailDevelopment and optimization of pegylated lipoplexes for vaginal application
Lechanteur, Anna ULg; Furst, Tania ULg; Kanber, Erdem et al

Conference (2014, October 04)

Detailed reference viewed: 36 (8 ULg)
Peer Reviewed
See detailDevelopment and organization of executive functions in 4-to 11 year-old children: A factor study.
Catale, Corinne ULg; Collette, Fabienne ULg; Lejeune, Caroline ULg et al

in Books of Abstract: Annual Meeting of the Belgian Association for Psychological Science (2011)

Executive functioning (EF) is an umbrella term used to refer to the higher-order cognitive processes whose principal function is to facilitate the adaptation of an individual to new and non-routine ... [more ▼]

Executive functioning (EF) is an umbrella term used to refer to the higher-order cognitive processes whose principal function is to facilitate the adaptation of an individual to new and non-routine situations. In the present study, inhibition, mental flexibility, and working memory were assessed through 6 executive tasks administered to 329 children aged from 4 to 11 years, in order to examine the development and organization of executive functioning in both early and middle childhood. Results reveal specific developmental trends for each component, with a period of rapid general development during the preschool period. Confirmatory factor analyses were used to examine the organization of EF in our sample. First, the poorness of fit of the unitary model was found for both groups, confirming the fractionated nature of EF in preschoolers as well as in older children. Second, the analyses confirmed the adequacy of the fit of the three-dimensional model (i.e., inhibition, flexibility, and working memory), while also indicating that other specific two-dimensional models gave reasonable fits to the data from both age groups. The factor structure obtained supports both the unitary and diversity nature of the executive organisation during early and middle childhood. Furthermore, our data suggest a progressive differentiation of executive processes (in particular flexibility and working memory) in the course of development. [less ▲]

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See detailDevelopment and performance assessment of a qualitative SYBR(R) green real-time PCR assay for the detection of Aspergillus versicolor in indoor air.
Libert, X.; Chasseur, C.; Bladt, S. et al

in Applied Microbiology and Biotechnology (2015), 99(17), 7267-7282

Currently, contamination of indoor environment by fungi and molds is considered as a public health problem. The monitoring of indoor airborne fungal contamination is a common tool to help understanding ... [more ▼]

Currently, contamination of indoor environment by fungi and molds is considered as a public health problem. The monitoring of indoor airborne fungal contamination is a common tool to help understanding the link between fungi in houses and respiratory problems. Classical analytical monitoring methods, based on cultivation and microscopic identification, depend on the growth of the fungi. Consequently, they are biased by difficulties to grow some species on certain culture media and under certain conditions or by noncultivable or dead fungi that can consequently not be identified. However, they could have an impact on human health as they might be allergenic. Since molecular methods do not require a culture step, they seem an excellent alternative for the monitoring of indoor fungal contaminations. As a case study, we developed a SYBR(R) green real-time PCR-based assay for the specific detection and identification of Aspergillus versicolor, which is frequently observed in indoor environment and known to be allergenic. The developed primers amplify a short region of the internal transcribed spacer 1 from the 18S ribosomal DNA complex. Subsequently, the performance of this quantitative polymerase chain reaction (qPCR) method was assessed using specific criteria, including an evaluation of the selectivity, PCR efficiency, dynamic range, and repeatability. The limit of detection was determined to be 1 or 2 copies of genomic DNA of A. versicolor. In order to demonstrate that this SYBR(R) green qPCR assay is a valuable alternative for monitoring indoor fungal contamination with A. versicolor, environmental samples collected in contaminated houses were analyzed and the results were compared to the ones obtained with the traditional methods. [less ▲]

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See detailDevelopment and performance assessment of an improved 8-node mixed type FEM element
Duchene, Laurent ULg; de Montleau, P.; Habraken, Anne ULg

in Juster, Neal; Rosochowski, Andrzej (Eds.) Proceedings of the 9th International ESAFORM Conference on Material Forming (2006)

Several finite element (FE) simulations were investigated using a recently developed mixed type element: the BWD3D. The main formulation of the element is largely described, with particular focus on the ... [more ▼]

Several finite element (FE) simulations were investigated using a recently developed mixed type element: the BWD3D. The main formulation of the element is largely described, with particular focus on the shear locking treatment. The formulation of the former BLZ3D element is also presented for comparison. The examples investigated in the present study were beam bending, large strain torsion, incremental forming and deep drawing .The numerical results obtained with both elements were compared to experiments. [less ▲]

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See detailDevelopment and Pilot Trial Results of Stochastic Targeted (STAR) Glycemic Control in a Medical ICU
Fisk, Liam M.; Le Compte, Aaron J.; Shaw, Geoffrey M. et al

in Proceedings of the 8th IFAC Symposium on Biological and Medical Systems (2012, August)

Detailed reference viewed: 21 (2 ULg)
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See detailDevelopment and pre-validation of a high sensitive method for the determination of levonorgestrel in human plasma by SPE/LC/MS-MS
Hubert, Cédric ULg; streel, Bruno; Sibenaler, Renilde et al

Poster (2007, July)

Detailed reference viewed: 31 (4 ULg)
See detailDevelopment and recent results from the Subaru coronagraphic extreme adaptive optics system
Jovanovic, N.; Guyon, O.; Martinache, F. et al

in Ground-based and Airborne Instrumentation for Astronomy V (2014, July 01)

The Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) instrument is one of a handful of extreme adaptive optics systems set to come online in 2014. The extreme adaptive optics correction is realized ... [more ▼]

The Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) instrument is one of a handful of extreme adaptive optics systems set to come online in 2014. The extreme adaptive optics correction is realized by a combination of precise wavefront sensing via a non-modulated pyramid wavefront sensor and a 2000 element deformable mirror. This system has recently begun on-sky commissioning and was operated in closed loop for several minutes at a time with a loop speed of 800 Hz, on ~150 modes. Further suppression of quasi-static speckles is possible via a process called "speckle nulling" which can create a dark hole in a portion of the frame allowing for an enhancement in contrast, and has been successfully tested on-sky. In addition to the wavefront correction there are a suite of coronagraphs on board to null out the host star which include the phase induced amplitude apodization (PIAA), the vector vortex, 8 octant phase mask, 4 quadrant phase mask and shaped pupil versions which operate in the NIR (y-K bands). The PIAA and vector vortex will allow for high contrast imaging down to an angular separation of 1 λ/D to be reached; a factor of 3 closer in than other extreme AO systems. Making use of the left over visible light not used by the wavefront sensor is VAMPIRES and FIRST. These modules are based on aperture masking interferometry and allow for sub-diffraction limited imaging with moderate contrasts of ~100-1000:1. Both modules have undergone initial testing on-sky and are set to be fully commissioned by the end of 2014. [less ▲]

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