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See detailDEVELOPMENT OF COMPOSITE MATERIALS BASED ON A CARBON NANOTUBES NETWORK FOR SPACE APPLICATIONS
Gailly, Patrick ULg; Delhalle, Joseph; Garray, Didier et al

Conference (2010, October 01)

For few years, carbon nanotubes (CNTs) are added to in various materials. As CNTs have high mechanical, thermal and electrical properties, it is expected to boost by adding CNTs the performances of the ... [more ▼]

For few years, carbon nanotubes (CNTs) are added to in various materials. As CNTs have high mechanical, thermal and electrical properties, it is expected to boost by adding CNTs the performances of the matrix material. Usually carbon nanotubes are used as additive to an organic matrix and in small quantities, below 1 wt%. In this work we develop composite materials with high amount of CNT, based on a carbon nanotubes network. The main type of CNT network manufactured and tested is buckypaper obtained by filtration of CNTs dispersed in a liquid solution. Other CNT networks like 3D preformed shape and CNT arrays have been also investigated. The potential improvement brought by adding CNT network to conventional materials has been evaluated using the engineering rules established for composites. Hence, the maximal achievable material properties have been estimated. Using the previously described analysis, the potential of CNT reinforced composite for different space applications have been ranked. The mechanical (mainly for CNT fibre) and thermal driven applications seem the most promising ones, especially if specific properties are considered (due to the low density of CNTs). On the basis of this evaluation and manufacturing technologies available in our consortium, experimental efforts have been put on the optimization of the CNT network mainly for improving its thermal performances. Influence of the CNTs characteristics on the macroscopic buckypaper properties has been evaluated with CNTs of different morphology (MWNT, DWNT), length and functionalization. Several processes for manufacturing the buckypaper have been tried, using different solutions for CNTs dispersion (surfactant, water or ethanol), or applying alternative method like in-situ growth of CNTs on buckypapers. Among different CNT network post-treatment also tried, thermal treatment up to 2800°C has given the greatest improvement on the specific thermal conductivity. Eventually the CNT network is infiltrated by an organic (epoxy) or inorganic (aluminium) matrix to make the composite. 3D shape CNT network gives highly reinforced composite with 30wt% of CNTs. Even if current properties of CNT reinforced composite materials are not yet competitive with reference aerospace materials, improvement potential is large and manufacturing technologies are growing. [less ▲]

Detailed reference viewed: 87 (8 ULg)
Peer Reviewed
See detailDevelopment of concurrent programs: an example
Gribomont, Pascal ULg

in TAPSOFT'89 (1989)

Detailed reference viewed: 10 (0 ULg)
Peer Reviewed
See detailDevelopment of concurrent systems by incremental transformation
Gribomont, Pascal ULg

in ESOP'90 (1990)

Detailed reference viewed: 4 (0 ULg)
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See detailDevelopment of cryopreservation methods for long-term preservation of cyanobacterial strains in the BCCM/ULC collection
Crahay, Charlotte ULg; Renard, Marine ULg; Mari, Maud et al

Poster (2015, August 03)

Long-term genetic and functional stability is a fundamental requirement for the maintenance of microorganisms and cryopreservation is the preferred method for the long-term storage of many micro-organisms ... [more ▼]

Long-term genetic and functional stability is a fundamental requirement for the maintenance of microorganisms and cryopreservation is the preferred method for the long-term storage of many micro-organisms, including cyanobacteria. The BCCM/ULC collection currently holds 200 cyanobacterial strains, but only 62 are cryo-preserved. The main limiting factors are the low levels of survival of some strains and the long periods required to recover from cryopreservation, and thus the inability to deliver rapidly cryopreserved strains to the user community. The devel-opment of improved cryopreservation protocols is therefore required for the future expansion and valorization of the collection. The BRAIN-be project PRESPHOTO (preservation of photosynthetic micro-algae in the BCCM collections) (www.presphoto.ulg.ac.be) aims to improve the preservation of cyanobacterial and diatoms in the BCCM/ULC and BCCM/DCG collections, respectively. [less ▲]

Detailed reference viewed: 46 (5 ULg)
See detailDevelopment of customer-oriented space weather related services for real-time GPS applications
Bavier, Michaël; Warnant, René ULg; Lejeune, Sandrine et al

Conference (2006)

Detailed reference viewed: 17 (0 ULg)
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See detailDevelopment of design rules for iron columns reinforced by FRP
Ly, Dong Phuong Lam ULg; Demonceau, Jean-François ULg; Jaspart, Jean-Pierre ULg

Report (2008)

In the available literature, some techniques of reinforcement are proposed: reinforcement with the use of cables, replacement of damage elements, creation of a composite action by connecting the damage ... [more ▼]

In the available literature, some techniques of reinforcement are proposed: reinforcement with the use of cables, replacement of damage elements, creation of a composite action by connecting the damage elements to a concrete slab, etc; but few of them are applicable to the Umberto 1 gallery. The one that seems to be applicable is the FRP (Fibre Reinforcement Polymer) technique. The behaviour of composite elements composed of FRP and steel members under tension seems to be known, but little information is available as far as the behaviour of such elements in compression. Following the "Iron meeting" held in Naples on June 8th, 2006, tests on stocky elements with and without FRP are planned to be performed in tension and in compression to identify the effect of FRP on such elements. In addition, tests on slender columns will be performed with and without FRP to investigate the influence of the latter on the buckling resistance. All the tests will be accompanied by coupon tests to identify the mechanical properties of the constitutive material of the tested specimens (Liège contribution to WP7). Based on the test campaign, analytical design rules founded on an elastic approach have been developed for the computation of the resistance of iron columns reinforced by FRP; these rules are detailed in the present section and reflect the contribution of the University of Liège to WP9. [less ▲]

Detailed reference viewed: 65 (11 ULg)
See detailDevelopment of design rules for steel structures subjected to natural fires in closed car parks
Schleich, Jean-Baptiste; Cajot, Louis-Guy; Pierre, M. et al

Report (1999)

Detailed reference viewed: 149 (4 ULg)
See detailDevelopment of design rules for steel structures subjected to natural fires in large compartments
Schleich, Jean-Baptiste; Cajot, Louis-Guy; Pierre, M. et al

Report (1999)

In this project was introduced for the first time in Europe the concept of localised fire which was quantified from the experimental tests made by Hasemi in Japan and was finaly introduced in Eurocode 1 ... [more ▼]

In this project was introduced for the first time in Europe the concept of localised fire which was quantified from the experimental tests made by Hasemi in Japan and was finaly introduced in Eurocode 1 (EN 1991-1-2) [less ▲]

Detailed reference viewed: 129 (3 ULg)
See detailDevelopment of diamond AGPM coronagraphs for VISIR and NACO
Delacroix, Christian ULg; Habraken, Serge ULg; Karlsson, Mikael et al

Conference (2012, March 22)

Detailed reference viewed: 35 (5 ULg)
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See detailDevelopment of digital holography in the long wave infrared range for assessment of space reflectors
Thizy, Cédric ULg; Vandenrijt, Jean-François ULg; Georges, Marc ULg et al

in Proceedings of ICSO 2010 - International Conference on Space Optics (2010, October)

Detailed reference viewed: 49 (10 ULg)
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See detailDevelopment of discontinuous Galerkin method for linear strain gradient elasticity
Chandran, Ram B; Noels, Ludovic ULg; Radovitzky, Raul

Conference (2007)

Detailed reference viewed: 16 (1 ULg)
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See detailDevelopment of Disease - Bacterial Toxins and their Interaction with Host Cells
Mainil, Jacques ULg

in Annales de Médecine Vétérinaire (2005), 149C(Special issue), 15-23

Detailed reference viewed: 6 (0 ULg)
See detailDevelopment of disease : bacterial toxins and their interaction with host cells
Mainil, Jacques ULg

Scientific conference (2005)

Detailed reference viewed: 15 (2 ULg)
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See detailDevelopment of Driver Assistance Systems by Use of SiL and HiL Techniques in the Traffic Flow Simulation Program PELOPS
Breuer, K.; Christen, Fréderic ULg

(2002, October 07)

In this article methods are shown to use software in the loop (SIL) and hardware in the loop (HIL) techniques in connection with the microscopic traffic flow simulation program PELOPS. With some ... [more ▼]

In this article methods are shown to use software in the loop (SIL) and hardware in the loop (HIL) techniques in connection with the microscopic traffic flow simulation program PELOPS. With some application examples the use of these methods are depicted. In this context the ossibilities of such coupled simulation tools in development of driver assistance systems are presented. An outlook is given to future enhancements of the described HIL techniques to control for example test benches or assess real vehicles in virtual traffic. [less ▲]

Detailed reference viewed: 40 (0 ULg)
See detailDevelopment of duplex RT-PCR tests for the routine detection of latent and ILAR viruses in fruit trees
Roussel, S.; Kummert, J.; Dutrecq, O. et al

Conference (2004)

Detailed reference viewed: 5 (0 ULg)
See detailDevelopment of duplex RT-PCR tests for the routine detection of latent and ILAR viruses in fruit trees
Roussel, S.; Kummert, J.; Dutrecq, O. et al

Poster (2004)

Detailed reference viewed: 4 (1 ULg)
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Peer Reviewed
See detailDevelopment of educational info capsules proposing instructional strategies aiming to deal with overweight and obese students
Cloes, Marc ULg; LEBRETHON, Marie-Christine ULg; Feron, Isaline

Conference (2014, February 13)

Irwin et al. (2003) pointed out the principles that quality PE teachers should incorporate into their pedagogical practice in order to take into account the increasing number of overweight and obese ... [more ▼]

Irwin et al. (2003) pointed out the principles that quality PE teachers should incorporate into their pedagogical practice in order to take into account the increasing number of overweight and obese students in their classes. Fighting against obesity is so complex that no simple solution can be proposed. It means that the development of specific tools providing PE teachers with new instructional strategies inspired from public health is needed (Prusak et al., 2011). Inclusion of overweight students into PE can be linked with a social ecological model (Li & Rukavina, 2012). Even if PE teachers are able to develop and implement specific instructional strategies, it seems that they need support from health experts (Cloes et al., 2013). Internet, continuing professional development activities, and educational info capsules were identified as the preferred supports to be used by the practitioners (Cloes et al., 2014). The aims of this study were to produce and validate three pedagogical capsules focusing on specific concerns of PE teachers as well as to analyze the procedure of validation. Using an extensive analysis of the literature, the researchers first identified theoretical and practical resources to be mobilized in the understanding and development of solutions for the selected problems: (1) Students’ lack of awareness about the risks of overweight and obesity; (2) Constraints associated with the motor/physical disabling; (3) Parents’ lack of awareness about PA impact on health. The capsules were then submitted to 11 experts (health specialists, health educators, psychologists, PE teachers) who had to analyze the documents. They acknowledged the content and form of the capsules. Minor changes were requested in order to finalize them. The proposed evaluation sheet was also validated but face-to-face assessment was recommended. Dissemination of the existing capsules as well as development of additional ones should be the next steps of this project. [less ▲]

Detailed reference viewed: 69 (4 ULg)