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Peer Reviewed
See detailFlow Pattern Evolution With Time Mixing Of Non-Newtonian Fluid In A Stirred Tank Using Particle Image Velocimetry
Fransolet, Emmanuelle; Marchot, Pierre ULg; Toye, Dominique ULg et al

in American Society of Mechanical Engineering (ASME) (Ed.) Proccedings of 7th Biennal ASME Conference, Engineering Systems Design and Analysis – ESDA 2004, Manchester, United Kingdom,19 – 22 July 2004 (2004)

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See detailFlow patterns and sediment deposition in rectangular shallow reservoirs
Dufresne, Matthieu; Dewals, Benjamin ULg; Erpicum, Sébastien ULg et al

in Water & Environment Journal (2012), 26(4), 504-510

This work involves the experimental investigation of flow patterns, preferential regions of deposition and trapping efficiency in rectangular shallow reservoirs. The main flow patterns that can be ... [more ▼]

This work involves the experimental investigation of flow patterns, preferential regions of deposition and trapping efficiency in rectangular shallow reservoirs. The main flow patterns that can be encountered in rectangular shallow reservoirs are described: symmetrical flows without any reattachment point (S0), asymmetrical flows with one reattachment point (A1), and asymmetrical flows with two reattachment points (A2). The influence of geometrical and hydraulic parameters on reattachment lengths is intensively investigated. A shape parameter is introduced to classify symmetrical and asymmetrical flows. For each flow pattern, the preferential regions of deposition are studied. To conclude, a number of practical recommendations are given. Reservoirs with a shape parameter lower than 6.2 limit sediment deposition. Reservoirs with a shape parameter greater than 6.8 are favourable for sediment deposition. Finally, perspectives for maximizing and minimizing deposition are given, respectively by exploiting the great trapping potential of the flow pattern A1 and the poor trapping potential of the flow pattern S0. [less ▲]

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See detailFlow Processing and the Rise of Commodity Network Hardware
Greenhalgh, Adam; Huici, Felipe; Hoerdt, Mickael et al

in ACM SIGCOMM Computer Communication Review (2009)

The Internet has seen a proliferation of specialized middlebox devices that carry out crucial network functionality such as load balancing, packet inspection and intrusion detection. Recent advances in ... [more ▼]

The Internet has seen a proliferation of specialized middlebox devices that carry out crucial network functionality such as load balancing, packet inspection and intrusion detection. Recent advances in CPU power, memory, buses and network connectivity have turned commodity PC hardware into a powerful network platform. Furthermore, commodity switch technologies have recently emerged offering the possibility to control the switching of flows in a fine-grained manner. Exploiting these new technologies, we present a new class of network architectures which enables flow processing and forwarding at unprecedented flexibility and low cost. [less ▲]

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See detailFlow rate dependency of critical wall shear stress in a radial-flow cell
Detry, Jean G; Jensen, Bo Boye Busk; Sindic, Marianne ULg et al

in Journal of Food Engineering (2009), 92(1), 86-99

In the present work, a radial-flow cell was used to study the removal of starch particle aggregates from several solid substrates (glass, stainless steel, polystyrene and PTFE) in order to determine the ... [more ▼]

In the present work, a radial-flow cell was used to study the removal of starch particle aggregates from several solid substrates (glass, stainless steel, polystyrene and PTFE) in order to determine the critical wall shear stress value for each case. The particle aggregates were formed by aspersion of a water or ethanol suspension of starch granules on the surfaces. Depending on the substrate and on the suspending liquid, the aggregates differed in size and shape. Aggregate removal was studied at two flow rates. At the lower flow rate (Re-inlet = 955), the values of critical wall shear stress for the different surfaces suggested that capillary forces were, for all of them, playing an important role in aggregate adhesion since aqueous based aggregates were always more difficult to remove. At the higher flow rate (Re-inlet = 2016) the critical wall shear stress increased as a result of the change in the flow pattern in the vicinity of the aggregates and not because of changes in the type of particle adhesion. This raises the importance of the experimental conditions on assessing the critical wall shear stress since this parameter may not be always only directly related to the soil adhesion strength. (C) 2008 Elsevier Ltd. All rights reserved. [less ▲]

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See detailFlow rate quality of new flat fan nozzles
Huyghebaert, Bruno; Debouche, Charles ULg; Mostade, Olivier

in Transactions of the ASAE (2001), 44(4), 769-773

Manufacturers of spraying nozzles have established manufacturing tolerances to guarantee the quality of their products. They control, among other things, the new nozzles’ flow rate by comparison with the ... [more ▼]

Manufacturers of spraying nozzles have established manufacturing tolerances to guarantee the quality of their products. They control, among other things, the new nozzles’ flow rate by comparison with the nominal flow rate. When the deviation exceeds a set limit, the nozzles are rejected. A survey carried out among three manufacturers made it possible to determine the manufacturing tolerances and limits that manufacturers impose upon themselves. The flow rates of 1565 new nozzles collected on the market from these manufacturers were measured on a device developed for this study. Different statistical tests assessed the performances and characteristics of the products. The quality standards announced by the manufacturers were not checked for every nozzle. On average, 20% of the new nozzles exceeded the manufacturing tolerances. The average flow rate of the nozzle sets equalled the nominal flow rate. In practice, the probability distribution of the flow rate of new nozzles should be normal. The dispersion of the new nozzle flow rates was slightly higher than the theoretical one. The quality of the products differed from one manufacturer to another. [less ▲]

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See detailThe flow structure of the Norwegian Atlantic Current
Hopkins, T. S.; Mouchet, Anne ULg; Giannecchinni, P.

Conference (1989, March)

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See detailFlow through porous media
Dassargues, Alain ULg

Scientific conference (1995)

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See detailFlow Visualization and Proper Orthogonal Decomposition of Aeroelastic Phenomena
Andrianne, Thomas ULg; Norizham, Abdul Razak ULg; Dimitriadis, Grigorios ULg

in Okamoto, Satoru (Ed.) Wind Tunnels (2011)

The modal decomposition of unsteady flowfields was proposed in the 1990s by several authors. Proper Orthogonal Decomposition (POD) is one method that can be used in order to perform this modal ... [more ▼]

The modal decomposition of unsteady flowfields was proposed in the 1990s by several authors. Proper Orthogonal Decomposition (POD) is one method that can be used in order to perform this modal decomposition; it became popular for aerodynamics research in the 2000s, although it was first proposed for use in fluid dynamics in the 1960s. The objective of the present work is to expand the methodology of the application of POD to experimental flowfields. There are two aspects to this expansion: 1. Allow the models to oscillate. The source of the unsteadiness will then be the movement of the model, as well as any unsteadiness due to flow separation. 2. Study the interaction between the different sources of unsteadiness. In particular observe how the modes generated by one source of unsteadiness interact with the modes generated by the other. Determine if it is possible to separate the structural from the aerodynamic sources of unsteadiness. [less ▲]

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See detailFlow-cytometric assessment of damages to Acetobacter senegalensis during freeze-drying process and storage
Shafiei, Rasoul ULg; Delvigne, Frank ULg; Thonart, Philippe ULg

in Acetic Acid Bacteria (2013), 2(2(s1)), 10

Downstream processes have great influences on bacterial starter production. Different modifications occur to cellular compounds during freeze-drying process and storage of bacterial starters. Consequently ... [more ▼]

Downstream processes have great influences on bacterial starter production. Different modifications occur to cellular compounds during freeze-drying process and storage of bacterial starters. Consequently, viability and culturability (multiplication capacity) undergo some changes. In this study, the effects of freeze-drying process and storage conditions were examined on cell envelope integrity, respiration and culturability of Acetobacter senegalensis. <br />Freezing of cells protected with mannitol (20% w/w) did not affect cell multiplication and respiration considerably; however, 19% of cells showed compromised cell envelope after freezing. After drying, 1.96×1011 CFU/g were enumerated, indicating that about 34% of the <br />cells could survive and keep their culturability. Drying of the cells induced further leakage in cell envelope and finally 81% of cells appeared as injured ones; however, 87% of the dried cells maintained their respiration capacity. Storage temperature had significant effect on cell multiplication ability; higher storage temperature (35°C),caused 8.59-log reduction in cell culturability after nine-month period of storage. Collapse of cell envelop integrity and respiration wasobserved at 35°C. At lower storage temperature (4°C), the culturability <br />decreased about one-log reduction after nine months. Cell envelope integrity was subjected to minor changes during a period of nine month-storage at 4°C whereas a heterogeneous population of cells with different respiration capacity emerged at 4°C. These results indicate that a major part of cells undergone drying process and storage entered into viable but non-culturable state. In addition, usage of different culture media didn’t improve resuscitation. Besides, it seems that sub-lethal damages to cell envelope caused uptake of propidium iodide, however these kinds of injuries could not impress cell multiplications and respiration. [less ▲]

Detailed reference viewed: 41 (19 ULg)
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See detailFlowering Goes Underground
Bouché, Frédéric ULg; Lobet, Guillaume ULg; D'Aloia, Maria ULg et al

Conference (2014, May 15)

Flowering is a crucial step in plant life cycle and is therefore tightly controlled by both environmental and endogenous cues. The involvement of the aerial organs of the plant in the molecular mechanisms ... [more ▼]

Flowering is a crucial step in plant life cycle and is therefore tightly controlled by both environmental and endogenous cues. The involvement of the aerial organs of the plant in the molecular mechanisms controlling floral transition has been extensively documented while the participation of the roots remains poorly investigated. However, the induction of flowering by photoperiod involves systemic signals that move in the phloem from leaves to sinks, and hence presumably reach the roots. We therefore performed a transcriptomic analysis of the roots during the induction of flowering in Arabidopsis thaliana and indeed identified a large number of differentially expressed genes. A reverse genetic approach further confirmed the pleiotropic effects of flowering time genes on root architecture. [less ▲]

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See detailThe flowering process: On the track of controlling factors in Sinapis alba
Bernier, Georges ULg; Corbesier, Laurent; Périlleux, Claire ULg

in Russian Journal of Plant Physiology (2002), 49(4, JUL-AUG), 445-450

The major physiological theories of the control of the flowering process are first presented and their inferences tested in the long-day plant Sinapis alba. Then, the genetic analyses of the control of ... [more ▼]

The major physiological theories of the control of the flowering process are first presented and their inferences tested in the long-day plant Sinapis alba. Then, the genetic analyses of the control of flowering time in Arabidopsis thaliana are also summarized with a brief overview of the several pathways, each including several genes, identified. Clearly, both the experimental data of physiological experiments and the multiplicity of interacting genetic pathways best support the theory of the multifactorial control of flowering. This is further shown by the fact that a critical gene expressed in the shoot meristem at floral transition in S. alba, MADS A (orthologous to A. thaliana SOC1), can be upregulated by a single dose of a cytokinin or a gibberellin, without leading to flowering. This indicates that the floral shift requires upregulation of other genes by other factors. [less ▲]

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See detailFlowOS: a Flow-Based Platform for Middleboxes
Abdul, Alim; Bezahaf, Mehdi; Mathy, Laurent ULg

in Proceedings of CoNEXT Workshops 2013 (2013)

Middleboxes are heavily used in the Internet to process the network tra c for a speci c purpose. As there is no open standards, these proprietary boxes are expensive and di - cult to upgrade. In this ... [more ▼]

Middleboxes are heavily used in the Internet to process the network tra c for a speci c purpose. As there is no open standards, these proprietary boxes are expensive and di - cult to upgrade. In this paper, we present a programmable platform for middleboxes called FlowOS to run on commod- ity hardware. It provides an elegant programming model for writing ow processing software, which hides the complexi- ties of low-level packet processing, process synchronisation, and inter-process communication. We show that FlowOS itself does not add any signi cant overhead to ows by pre- senting some preliminary test results. [less ▲]

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See detailFlowOS: A Programmable Platform for Commodity Hardware Middleboxes
Abdul, Alim; Bezahaf, Mehdi; Mathy, Laurent ULg

in Proceedings of CFI 2013 (2013)

Detailed reference viewed: 67 (3 ULg)
Peer Reviewed
See detailFlowOS: a pure flow-based vision of network traffic
Abdul, Alim; Bezahaf, Mehdi; Mathy, Laurent ULg

in Proceedings of ANCS 2012 (2012)

Detailed reference viewed: 21 (4 ULg)
Peer Reviewed
See detailFlows and bedload dynamics around spur dike in a compound channel
Baba, Y.; Camenen, B.; Peltier, Yann ULg et al

in 11th Int. Symp. On River Sedimentation (2010)

Detailed reference viewed: 8 (1 ULg)
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See detailFlowstream Architectures
Greenhalgh, Adam; Handley, Mark; Hoerdt, Mickael et al

in Electronic Communications of the EASST (2009)

The Internet has seen a proliferation of specialized middlebox devices that carry out crucial network functionality such as load balancing, packet inspection or intrusion detection, amongst others ... [more ▼]

The Internet has seen a proliferation of specialized middlebox devices that carry out crucial network functionality such as load balancing, packet inspection or intrusion detection, amongst others. Traditionally, high performance network devices have been built on custom multi-core, specialized memory hierarchies, architectures which are well suited to packet processing. Recently, commodity PC hardware has experienced a move to multiple multi-core chips, as well as the routine inclusion of multiple memory hierarchies in the so-called NUMA architectures. While a PC architecture is obviously not specifically targeted to network applications, it nevertheless provides high performance cheaply. Furthermore, a few commodity switch technologies have recently emerged offering the possibility to control the switching of flows in a rather fine grained manner. Put together, these new technologies offer a new network commodity platform enabling new flow processing and forwarding at an unprecedented flexibility and low cost. [less ▲]

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See detailFlucht und Verfolgung: Die Shoa in Belgien
Pontzen, Alexandra ULg

in Literaturkritik.de (2010)

Detailed reference viewed: 26 (4 ULg)
See detailDas Fluchtmotiv in Max Frischs Mein Name sei Gantenbein
Letawe, Céline ULg

Master's dissertation (2001)

Detailed reference viewed: 26 (1 ULg)