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See detailDesign and verification of the Far Ultraviolet Spectrographic Imager (FUV-SI) for the IMAGE mission
Renotte, Etienne ULg; Habraken, Serge ULg; Rochus, Pierre ULg et al

in Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series (1998, November 01)

The IMAGE FUV-SI is simultaneously imaging auroras at 121.8 nm and 135.8 nm. The spectrograph design challenge is the efficient rejection of the intense Lyman-alpha emission at 121.6 nm while passing its ... [more ▼]

The IMAGE FUV-SI is simultaneously imaging auroras at 121.8 nm and 135.8 nm. The spectrograph design challenge is the efficient rejection of the intense Lyman-alpha emission at 121.6 nm while passing its Doppler-shifted component at 121.8 nm. The FUV-SI opto-mechanical design, analysis integration, and verification of performances against environment are discussed in this paper. In absence of STM environmental constraints at subsystem levels are derived analytically from F.E.M. and used for pre-qualifying optical subsystems. [less ▲]

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See detailDesign as conceptual research and political instrument: role and legacy of the Italian Radical movement
Prina, Daniela ULg

in Glynne, Jonathan; Hackney, Fiona; Minton, Viv (Eds.) Proceedings of the 2008 Annual International Conference of the Design History Society (UK) University College Falmouth, 3-6 September (2010, June 01)

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See detailIl design come strumento di lotta politica : il contributo del movimento Radical tra Firenze e Torino (1965-1975)
Prina, Daniela ULg

in Balicco, Daniele (Ed.) Made in Italy e cultura - Indagine sull'identità italiana contemporanea (2015)

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See detailIl design come strumento politico e ideologico, tra Firenze e Torino (1965-1975)
Prina, Daniela ULg

in Allegoria (2014), 68(2), 76-86

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See detailDesign criteria and experimental performance - Extended end-plate
Demonceau, Jean-François ULg

Conference (2016, June 21)

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See detailDesign criteria for a hybrid nano/photolithography system
Niblock, T.; Kraft, Michael ULg; Sehr, H.

in Proc. Conf. on Micromechanics Europe (2001)

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See detailDesign Decision Tool for Zero Energy Buildings, Passive and Low Energy Architecture,
Attia, Shady ULg; De Herde, André

in Proceedings of Passive and Low Energy Architecture (PLEA) 2011 (2011, July 13)

Proposing initial ideas for zero energy buildings is a difficult task. Various existing BPS tools have been proposed and are used to support the design of zero energy buildings during later design stages ... [more ▼]

Proposing initial ideas for zero energy buildings is a difficult task. Various existing BPS tools have been proposed and are used to support the design of zero energy buildings during later design stages. However, this is when many detailed decisions about the design have already been taken. There is a growing awareness to integrate BPS tools in the design process during early design phases. This is one of the main objectives of that we adopt here to develop a suggested decision tool. In this paper, we specifically discuss the realization of a tool for early architectural design of zero energy housing. The paper presents the first prototype of this tool that has been tested with different volunteers to see how they react. A major focus of his work is the graphical user interface. We describe the interface development process, the resulting prototype and its performance for initial design conception of different zero energy housing typologies. We also identify direction for future development of the tool. [less ▲]

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See detailLE DESIGN DES SYSTÈMES DE CONTRÔLE DE GESTION ADOPTÉS PAR LES SPIN-OFFS ACADÉMIQUES DE HAUTE TECHNOLOGIE : LE RÔLE DE L’INCERTITUDE PERÇUE
Van Caillie, Didier ULg; Kabwigiri, Charles ULg

Scientific conference (2007)

Uncertainty is one of the contingency factors examined by previous studies on management control systems design. However, its role remains unclear. This paper presents the results of an empirical study ... [more ▼]

Uncertainty is one of the contingency factors examined by previous studies on management control systems design. However, its role remains unclear. This paper presents the results of an empirical study, which shows that perceived uncertainty more intervenes to explain the of informal management control mechanisms and the interactive use of formal management control systems than to explain the nature of the latter. [less ▲]

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See detailLe design du système d’information comptable dans les PMI tunisiennes: une modélisation contingente
Ghorbel, Jihene ULg

Conference (2012, October 24)

Les petites et moyennes entreprises (PME) constituent l’un des piliers de l’économie tunisienne où elles représentent 97 % du tissu économique. Bien que les études consacrées aux PME tunisiennes (Adair et ... [more ▼]

Les petites et moyennes entreprises (PME) constituent l’un des piliers de l’économie tunisienne où elles représentent 97 % du tissu économique. Bien que les études consacrées aux PME tunisiennes (Adair et al., 2009 ; Fhima et al., 2009 ; Djelassi et al. , 2010 ) sont assez nombreuses, rares sont les recherches scientifiques qui portent sur les spécificités des PME industrielles. Or, comme les autres entreprises, les PMI tunisiennes sont forcées de s’adapter aux mutations profondes qui caractérisent nos environnements et cette adaptation passe par une évolution constante de leur système d’information, notamment dans sa dimension comptable. Notre contribution se propose dès lors d’étudier théoriquement, au départ de l'analyse de la littérature développée en contexte tunisien, les spécificités des PMI tunisiennes et d’examiner l’impact des facteurs de contingence tels que la taille, le cycle de vie, la structure organisationnelle, l’incertitude de l’environnement, le secteur d’activité, le profil du dirigeant, l’âge et l’exportation sur le design du système d’information comptable. [less ▲]

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See detailLe design du système de contrôle de gestion dans les PMI tunisiennes: une modélisation contingente
Ghorbel, Jihene ULg; Van Caillie, Didier ULg

E-print/Working paper (2012)

A l'heure actuelle, il existe relativement peu de recherches qui traitent du système de contrôle de gestion des PME, spécialement dans le contexte tunisien, malgré leur importance économique. La présente ... [more ▼]

A l'heure actuelle, il existe relativement peu de recherches qui traitent du système de contrôle de gestion des PME, spécialement dans le contexte tunisien, malgré leur importance économique. La présente communication vise dès lors à élaborer un modèle théorique expliquant le design du système de contrôle de gestion dans les PMI tunisiennes, au départ d'une analyse de la littérature portant spécifiquement soit sur les PMI tunisiennes, soit sur le système de contrôle de gestion de la PME. Cette étude est réalisée en privilégiant deux angles d'analyse particulièrement importants au vu du contexte tunisien, à savoir la taille de l'entreprise et son positionnement sur le cycle de vie. [less ▲]

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See detailLe design du système de contrôle de gestion des PME : une quête de stabilité adaptative
Van Caillie, Didier ULg; Santin, Sarah; Rouhana, Rima ULg

in Actes du XXIIIème Congrès de l'Association Francophone de Comptabilité (2008, May)

This paper discusses the characteristics of management control systems in SMEs and insists on their ability to monitor change and performance in high turbulent environment

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See detailDesign et évaluation de nouveaux biomatériaux pour la construction de tissus
Grandfils, Christian ULg

Conference (2011, January 19)

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See detailDesign et synthèse de nouveaux dérivés coumariniques inhibiteurs de thrombine
Frederick, R.; Pochet, L.; Pirotte, Bernard ULg et al

Poster (2002, May 31)

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See detailDesign for a multi-channel recording and stimulation device
Dethier, Julie ULg

Master's dissertation (2010)

Brain functions can be severely altered by accidents leading to traumatic brain injuries or by diseases such as strokes, cancers or Alzheimer's. Currently, there are no medical instruments capable of ... [more ▼]

Brain functions can be severely altered by accidents leading to traumatic brain injuries or by diseases such as strokes, cancers or Alzheimer's. Currently, there are no medical instruments capable of restoring cognitive function, but recent progress in neurophysiology coupled with development of engineering techniques has introduced the era of a new class of devices: neural prostheses or brain-computer interfaces (BCIs). BCIs carry great promises: possibilities to stimulate areas of the brain to prevent or treat failures of the nervous system. Today, most devices used in this domain are not capable of restricting their action to specified anatomical targets due to the large size of the electrodes. In 2007, the BES-group (imec, Leuven) developed silicon-based multi-electrode neural probe arrays interacting at a single neuron level (single-unit) for in vivo selective neuronal recording and stimulation. My Master Thesis was developed with imec, Leuven, and focused on the realization of a multi-channel recording system for neural applications to enable a closed-loop approach (recording - stimulation - recording) that would allow for adjustment and fine tuning of the required stimulation pattern. The system’s read-out conditions and digitizes eight channels and provides the digitized output to an existing TI MSP430 based microprocessor system for wired or wireless data handling. The resulting platform can be used as a prototype for extensive experimental testing by biomedical scientists from the BES-group (imec). The first step in the study is the analysis, from a theoretical standpoint, of the conditioning and digitalization of the signals: low-noise amplification, filtering, offset compensation and digitization. A signal-to-noise study is performed, leading to the selection of electronic components suitable for my project. In the second part of the work, the PCB layout is conceived in a miniaturized SMD design style. The code implemented in the microprocessor MSP430 is detailed both for the recording of a single channel and eight channels concurrently. Adaptation of the amplification factor can be carried out either by digital processing or by user interaction. Design of the wireless link between a PC and the board is then considered. The link is built from the eZ430-RF2500 Development Tool (Texas Instruments), a complete USB-based wireless development tool providing all the hardware and software to create a wireless network. Eventually, the performance and limitations of the design are evaluated. The system handles properly the entire frequency range of action potentials (from 100Hz to 6kHz) for both wired and wireless configurations and shows very good results for signals with amplitude higher than 1mV_pp. Gain variation is available with either a stand-alone digital processing method or with user's control through keyboard and achieves satisfactory results for both accuracy and rapidity. The major limitation is a lack of accuracy for signals below 500〖μV〗_pp. Solutions for future designs are proposed including suppression of the offset compensation circuit and acceleration of the communication with the computer. Ideas for the addition of stimulation functions are proposed in hopes of a closed-loop approach. Last but not least, power supply and dissipation considerations are tackled. [less ▲]

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See detailDesign for an Ipriflavone Multicenter European Fracture Study
Reginster, Jean-Yves ULg; Bufalino, L.; Christiansen, C. et al

in Calcified Tissue International (1997), 61(Suppl 1), 28-32

In order to investigate the efficacy of ipriflavone (i.p.) on the prevention of vertebral fractures and the effect on bone mineral density (BMD) in women with postmenopausal osteoporosis, a large ... [more ▼]

In order to investigate the efficacy of ipriflavone (i.p.) on the prevention of vertebral fractures and the effect on bone mineral density (BMD) in women with postmenopausal osteoporosis, a large multicentric European study was designed and is presently ongoing. Included in the study were 460 Caucasian, nonobese postmenopausal women aged > 45 and < 75 years, menopaused for at least 12 months. Inclusion was on the basis of a lumbar bone mineral density (BMD) lower than 2 SD compared with healthy women aged 50 years, corresponding to values below 0.860 g/cm2 (antero-posterior measurement) by Hologic QDR 1000. Women with prevalent vertebral fractures were excluded as well as those presenting secondary osteoporosis or having been treated with medications that could affect bone metabolism. This study was designed as a 3-year, double-blind, placebo-controlled, parallel group study that randomized the women to the oral administration of either 3 x 200 mg/day of i.p. or placebo. All patients received a daily supplement of 500 mg calcium. The primary purpose of the study was to evaluate the efficacy of i.p. in preventing vertebral nontraumatic fractures. Fracture is defined here as a > or = 20% decrease in any anterior, central, or posterior T4-L4 vertebral height. Blinded vertebral X-ray readings and vertebral morphometry have been centralized in an independent Center, with standardized evaluation of two experts. Power calculations have been based on the hypothesis that 21% of placebo-treated patients would fracture within 3 years and that treatment with i.p. would lead to a 50% reduction in the incidence of fracture. Statistical tests have been designed to have a power of 80%, with a type I error equal to 5%. Secondary endpoints were changes in vertebral, radial, and femoral BMD. Centralized controls on 100% BMD scans would ensure the good quality of BMD readings. This study should verify the hypothesis that i.p. significantly decreases the risk of vertebral fracture in postmenopausal, osteoporotic women. [less ▲]

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See detailA design for living: metaleptic devices and trends of gnostic imagination in contemporary science-fiction
Claisse, Frédéric ULg

Conference (2012, October)

As a narrative pattern and a cultural motif, the confusion between fictional worlds and reality traditionally leads to metaphysical arguments about liberty and destiny. Despite their drawing heavily on ... [more ▼]

As a narrative pattern and a cultural motif, the confusion between fictional worlds and reality traditionally leads to metaphysical arguments about liberty and destiny. Despite their drawing heavily on scientific imagination and technoscientific artefacts, science fiction movies exploring that theme never really broke with the way it has been treated since Calderon de la Barca’s Life is a dream: the hero’s quest leads him to doubt his own identity and dispute the ontological status of the world he lives in, leaving him and the viewer perplexed as to the ultimate nature of things. Yet, in the last fifteen years, an increasing number of science-fiction movies renewed that interrogation, notably by placing the issue of design at the centre of the plot: fictional worlds are not only denounced as fictional, but also shown as works in progress, literally rebuilt according to the plan of not-so-hidden designers acting as demiurges. In Dark City, Vanilla Sky or, more recently, Inception and The Adjustment Bureau, the emphasis on design and architecture together with the use of computational metaphors result in the promotion of one particular world to the status of “reference” universe, to be held as more “real” than other, fabricated and computed worlds made accessible by sophisticated devices operating as metaleptic instruments (such as Neo’s cable plug or the “bio-ports” in ExistenZ). This paper wishes to explore this shift towards “gnostic", Matrix-like science-fictional narratives, particularly in relation to the dramatic development of networking and surveillance capabilities that occurred during the same period. [less ▲]

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See detailDesign for polarizing holographic optical elements
Habraken, Serge ULg; Renotte, Yvon; Roose, Stéphane ULg et al

in Applied Optics (1995), 34(19), 3595-3602

We present results of the application of a three-dimensional rigorous-vector coupled-wave theory to the design of polarizing holographic optical elements. Two different cases have been selected giving ... [more ▼]

We present results of the application of a three-dimensional rigorous-vector coupled-wave theory to the design of polarizing holographic optical elements. Two different cases have been selected giving rise to two types of element, one of which is completely original. Experimental realizations were performed. The recording material was dichromated gelatin because of its outstanding performance related to diffraction efficiency. A fair agreement between the theoretical previsions and the experimental results was achieved. [less ▲]

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See detailDesign guidelines for construction of energy efficient buildings in North-East India
Singh, Manoj Kumar ULg; Mahapatra, Sadhan

Scientific conference (2006, February)

Energy and Built Environment are closely related, the more is the energy consumption the worse is the environment degradation. The use of natural lighting and the use of solar energy for heating and ... [more ▼]

Energy and Built Environment are closely related, the more is the energy consumption the worse is the environment degradation. The use of natural lighting and the use of solar energy for heating and cooling as well as enhanced natural ventilation not only reduce the commercial energy demand but minimize the impact on environment too. Traditional buildings constructed long back in the different climatic zones of the region have a number of passive features which help in controlling the indoor environment mostly by promoting ventilation, as humidity level is alarmingly high in this region. There are exhibits of indigenous use of locally available materials and techniques to construct buildings that are adapted to local climatic conditions or even to the ethnicity of the community. Guidelines are prepared taking into consideration the different features like site, orientation & planform, building envelope and daylight for low-rise residential buildings; since these are very common in this region. [less ▲]

Detailed reference viewed: 36 (0 ULg)