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Peer Reviewed
See detailDesigning AFM Tips for Playing Mechanochemistry with Single Molecules
Cuenot, S.; Gabriel, Sabine ULg; Jérôme, Christine ULg et al

Conference (2005, February 20)

Detailed reference viewed: 3 (0 ULg)
See detailDesigning AFM Tips for Playing Mechanochemistry with Single Polymers
Duwez, Anne-Sophie ULg

Conference (2005, October 27)

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See detailDesigning and implementing a GIS in an international context
Pantazis, Dimos N; Cornélis, Bernard ULg

in Transactions in GIS (1997), 1(4), 301-320

International collaborations between private companies, national research laboratories, and universities in the field of GIS have opened up new ways of exchanging knowledge and experiences between ... [more ▼]

International collaborations between private companies, national research laboratories, and universities in the field of GIS have opened up new ways of exchanging knowledge and experiences between different countries. However, when a collaboration involves the actual design and implementation of an operational GIS, rather than simply theoretical or applied research, or the development of specific applications, many problems can arise, sometimes leading either to the partial success or the complete failure of the project. Some of these problems are frequently encountered in all kinds of international collaborations: problems arising from different cultural mentalities, difficulties establishing a single common leadership, difficulties with communication and information exchange, and so on. Problems relating to the specific nature of the GIS are also present, for example the absence of digital geographic data format standards, the absence of metadata standards, the omission to use GIS or IS design methods, etc. This paper focuses on a joint Sino-Belgian project for the design and implementation of an urban geographical information system (UGIS) integrating remote sensing techniques in Hangzhou city, China and examines the general, specific, and international aspects of the problems encountered in an international collaboration. [less ▲]

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See detailDesigning and testing an air-PCM heat exchanger for building ventilation application coupled to energy storage
Dechesne, Bertrand ULg; Gendebien, Samuel ULg; Martens, Jonathan et al

in 2014 Purdue Conferences Proceedings (2014)

This paper studies a PCM heat exchanger coupled to a building ventilation system. This PCM module can either store heat during the day (e.g. by cooling solar PV panels) and restore it to the building ... [more ▼]

This paper studies a PCM heat exchanger coupled to a building ventilation system. This PCM module can either store heat during the day (e.g. by cooling solar PV panels) and restore it to the building during the night for space heating purposes or store coolness during the night and give it back during the day and thus act as a free cooling system. This project aims to develop a performing air-PCM heat exchanger providing latent energy storage of 0.5 kWh, this energy is delivered between 15 and 30°C. This heat exchanger is based on corrugated cells that can be easily filled, lined up and then locked in a box, letting the air pass between the cells. The PCM used for the prototype is c omposed of fatty acids. In order to develop an efficient PCM ventilation module, two different ways of investigation were followed and used in parallel. The first one used CFD simulations and the second one, a semi-empirical model based on correlations. The CFD simulations were able to predict the convection coefficient on the air side and also show the flow repartition between the different channels whereas the semi-empirical model allowed a parametrical study in order to identify the best geometry possible. Once the heat exchanger geometry was optimized, a test bench was built and a prototype of air-PCM heat exchanger was manufactured in order to measure its thermal and hydraulic performances. The tests consist in either a complete solidification or liquefaction of the PCM starting from respectively liquid PCM at 30°C or solid PCM at 15°C. The airflow rate was set to 45m³/h, which corresponds barely to the ventilation rate of a traditional room in a residential building. A comparison between the models and the measurements was carried out in order to calibrate the semi-empirical model. It will be shown that a simple semi-empirical model satisfactorily predicts the evolution of heat transfer rate for different operating conditions. [less ▲]

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See detailDesigning Courses on the Nature and History of Science
Leyh, Bernard ULg; Avitabile, Gustavo; Kelly, Orla

in Maciejowska, Iwona; Byers, Bill (Eds.) A Guidebook of Good Practice for the Pre-Service Training of Chemistry Teachers (2015)

Achieving scientific literacy is recognized as an essential goal of secondary school education. This obviously implies that science teachers, themselves, need to be scientifically literate, which in turn ... [more ▼]

Achieving scientific literacy is recognized as an essential goal of secondary school education. This obviously implies that science teachers, themselves, need to be scientifically literate, which in turn requires that emphasis should be placed on Nature of Science (NoS) issues in university pre-service (and also in-service) teacher education courses. A review of the research literature reveals that the beliefs and the understanding of teachers about NoS are often simplistic and lacking internal consistency. Research has also shown that explicit approaches towards NoS teaching are more efficient than implicit ones, and that analysis of historic cases can be an effective teaching tool. Based on an analysis of the existing literature and on their teaching experience, the authors propose a NoS curriculum for pre-service science teachers in chemistry, biology and physics and critically discuss a case example of NoS teaching practice consisting of four weekly seminars of two hours each. These seminars focus on identifying the learners’ preconceptions through team work, on discussing explicitly key NoS concepts and epistemological theories based on an inductive approach, and on highlighting the pedagogical implications. Suggestions for teaching the history of science (with emphasis on chemistry) are also provided. [less ▲]

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See detailDesigning large-scale CO2 capture units with assessment of solvent degradation
Léonard, Grégoire ULg; Crosset, Cyril; Dumont, Marie-Noëlle ULg et al

Poster (2014, October)

Solvent degradation is a major drawback for the large-scale implementation of post-combustion CO2 capture due to amine consumption and emission of degradation products. In the present work, we refine a ... [more ▼]

Solvent degradation is a major drawback for the large-scale implementation of post-combustion CO2 capture due to amine consumption and emission of degradation products. In the present work, we refine a previous kinetic model for describing solvent oxidative and thermal degradation based on experimental results. The CO2 capture process is then modeled in Aspen Plus with assessment of solvent degradation. As a result, this work provides a useful tool for the identification of optimal operating conditions that minimize both the energy and environmental impacts of the process. [less ▲]

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See detailDesigning large-scale CO2 capture units with assessment of solvent degradation
Léonard, Grégoire ULg; Crosset, Cyril; Dumont, Marie-Noëlle ULg et al

in Energy Procedia (2014), 63

Solvent degradation is one of the main operational drawbacks of post-combustion CO2 capture with amine solvents. Although the different degradation mechanisms have been largely studied in recent years, it ... [more ▼]

Solvent degradation is one of the main operational drawbacks of post-combustion CO2 capture with amine solvents. Although the different degradation mechanisms have been largely studied in recent years, it is still impossible to predict the solvent losses and the emissions of degradation products that may occur in a CO2 capture plant depending on its size and on its operating conditions. In the present work, we experimentally study the degradation of MEA monoethanolamine) under accelerated conditions implying high temperature, continuous gas feed and vigorous agitation. A special focus is set on the oxidative degradation of MEA, which is studied in the absence of CO2. Based on the experimental results, we propose a kinetic model to describe both MEA oxidative and thermal degradation pathways. The degradation kinetics is then included into a global model of the CO2 capture process, enabling solvent losses and emissions of degradation products to be predicted as a function of the process operating conditions. The predicted MEA loss is in the same order of magnitude as reported in degradation measurements from pilot plants, although lower by a factor 3. This kind of model assessing solvent degradation could and should be used for the design of large-scale CO2 capture plants in order to simultaneously consider the energy consumption of the process and its environmental impact related to the emissions of degradation products and amine solvent. Further developments shall consider the effect of SOx, NOx and dissolved metals on MEA degradation. [less ▲]

Detailed reference viewed: 61 (16 ULg)
See detailDesigning new materials for environmental catalysis
Heinrichs, Benoît ULg

Learning material (2009)

Detailed reference viewed: 10 (1 ULg)
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See detailDesigning optimal calcium phosphate scaffold-cell combinations using an integrative model-based approach.
Carlier, Aurélie ULg; Chai, Y.C.; Moesen, M. et al

in Acta Biomaterialia (2011), 7(10), 3573-85

Bone formation is a very complex physiological process, involving the participation of many different cell types and regulated by countless biochemical, physical and mechanical factors, including ... [more ▼]

Bone formation is a very complex physiological process, involving the participation of many different cell types and regulated by countless biochemical, physical and mechanical factors, including naturally occurring or synthetic biomaterials. For the latter, calcium phosphate (CaP)-based scaffolds have proven to stimulate bone formation, but at present still result in a wide range of in vivo outcomes, which is partly related to the suboptimal use and combination with osteogenic cells. To optimize CaP scaffold selection and make their use in combination with cells more clinically relevant, this study uses an integrative approach in which mathematical modeling is combined with experimental research. This paper describes the development and implementation of an experimentally informed bioregulatory model of the effect of calcium ions released from CaP-based biomaterials on the activity of osteogenic cells and mesenchymal stem cell driven ectopic bone formation. The amount of bone formation predicted by the mathematical model corresponds to the amount measured experimentally under similar conditions. Moreover, the model is also able to qualitatively predict the experimentally observed impaired bone formation under conditions such as insufficient cell seeding and scaffold decalcification. A strategy was designed in silico to overcome the negative influence of a low initial cell density on the bone formation process. Finally, the model was applied to design optimal combinations of calcium-based biomaterials and cell culture conditions with the aim of maximizing the amount of bone formation. This work illustrates the potential of mathematical models as research tools to design more efficient and cell-customized CaP scaffolds for bone tissue engineering applications. [less ▲]

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See detailDesigning Photobioreactors based on living cells immobilized in silica gel for carbon dioxide mitigation
Rooke, Joanna; Léonard, Alexandre ULg; Meunier, Christophe et al

in ChemSusChem (2011), 4

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See detailDesigning scroll expanders for use in heat recovery Rankine cycles
Lemort, Vincent ULg; Quoilin, Sylvain ULg

(2009)

This paper first investigates experimentally the performance of a prototype of oilfree open-drive scroll expander working with water and with HCFC-123. Using experimental data, two different simulation ... [more ▼]

This paper first investigates experimentally the performance of a prototype of oilfree open-drive scroll expander working with water and with HCFC-123. Using experimental data, two different simulation models of the expander are then proposed and validated. These models are finally used to analyze the measured performance with regard to the expander design characteristics. [less ▲]

Detailed reference viewed: 208 (28 ULg)
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See detailDesigning Steel Structures for Fire Safety
Franssen, Jean-Marc ULg; Kodur, Venkatesh; Zaharia, Raul

Book published by Taylor & Françis Ed. (2009)

In this book the information relevant to fire design of steel structures is presented in a systematic way in seven chapters. Each Chapter begins with an introduction of various concepts to be covered and ... [more ▼]

In this book the information relevant to fire design of steel structures is presented in a systematic way in seven chapters. Each Chapter begins with an introduction of various concepts to be covered and follows with detailed explanation of the concepts. The calculation methods as relevant to code provisions (in Europe, North America or other continents) are discussed in detail. Worked examples relevant to calculation methodologies on simple structural elements are presented. For the case of complete structures guidance on how analysis can be carried out is presented. Chapter 1 of the book is devoted to providing relevant background information to codes and standards and principles of fire resistance design. The chapter discusses the fire safety design philosophies, prescriptive and performance-based design fire safety design issues. Chapter 2 deals with basis of design and mechanical loads. The load combinations to be considered for fire design of structures, as per European and North American codes and standards, are discussed. Chapter 3 discusses the detailed steps involved in establishing the fire scenarios for various cases. Both Eurocode and North American temperature-time relationships are discussed. Procedures in this section allow the designer to establish the time-temperature relationships or heat flux evolutions under a specified design fire. Chapter 4 deals with steps associated in establishing the temperature history in the steel structure, resulting from fire temperature. The various approaches for undertaking thermal analysis by simple calculation models are discussed. Chapter 5 presents the steps associated for establishing the mechanical response of a structure exposed to fire. The possibilities for analysis at different levels: member level, sub-structure level and global level are discussed. Full details related to simple calculation methods for undertaking strength analysis at member level are presented. Chapter 6 is devoted to fire resistance issues associated with design of joints. The steps associated with the fire resistance of a bolted or a welded joint through simplified and detailed procedure are discussed. Chapter 7 deals with thermal and mechanical analysis through advanced calculation models. The procedures involved in the sub-structure analysis or global structural analysis under fire exposure is fully discussed. Case studies are presented to illustrate the detailed fire resistance analysis of various structures. Chapter 8 presents four design examples showing how a complex structure can be designed using the concept of element or sub-structure analysis. The book concludes with two Annexes which present some of the design information related to material properties and temperature profiles. Annex 1 focuses on thermal properties of structural steel and commonly used insulation materials and resulting temperature profiles in steel. Annex 2 focuses on mechanical properties of structural steel. [less ▲]

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See detailDesigning structural joints according to Eurocodes
Jaspart, Jean-Pierre ULg

in Proceedings of the "NATO Advanced Research Workshop on the Paramount Role of Joints into the Reliable Response of Structures" (2000)

Detailed reference viewed: 36 (3 ULg)
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See detailDesigning the Malqaf for summer cooling in low-rise housing an experimental study
Attia, Shady ULg; De Herde, André

in Proceedings of Passive and Low Energy Architecture (PLEA) 2009 (2009, June)

The malqaf or windcatcher is Egyptian vernacular archetypal device that traps the wind into the building. For centuries, the malqaf has been used as a viable solution to ensure natural ventilation ... [more ▼]

The malqaf or windcatcher is Egyptian vernacular archetypal device that traps the wind into the building. For centuries, the malqaf has been used as a viable solution to ensure natural ventilation. However, for the last 50 years, Egyptian practice has failed in combining traditional architectural devices into new techniques that could lead to sustainable and energy aware buildings. In Egypt, more than half of the urban peak load of energy consumption in the mean time is used to satisfy air conditioning demands alone. Therefore, the objective of the research is to develop a viable passive alternative to active cooling by exploring the potentials and design parameters of windcatchers as solution for passive cooling and natural ventilation during the summer season for low-rise housing. Experimental wind tunnel and smoke visualisation testing were conducted to compare the air flow in a scale model room with and without windcatcher on top of the roof with different orientations. The final result shows that the performance of the windcatcher depends greatly on the position, orientation and size of the inlet and outlet opening in relation to the wall ratio. The study developed a comparative matrix for examined parameters to support architects with the basic principles for windcatchers design. [less ▲]

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See detailDesigning together - CAADFutures 2011
Leclercq, Pierre ULg; Heylighen, Ann; Martin, Geneviève

Book published by Éditions de l'Université de Liège (2011)

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See detailDESIGNOR: A Decision Support Procedure for Industrial Product Design
Choffray, Jean-Marie ULg; Lilien, Gary L.

in Journal of Business Research (1982), 10

This paper presents a model-based methodology called DESIGNOR to support design decisions for new industrial products. Models and measurements are developed to assess the relationship between product ... [more ▼]

This paper presents a model-based methodology called DESIGNOR to support design decisions for new industrial products. Models and measurements are developed to assess the relationship between product features and market potential. The methodology incorporates a measurement survey for model calibration and leads to empirical tradeoff curves between design dimensions. [less ▲]

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See detailDESIGNOR: une méthode nouvelle d'aide à la conception des produits industriels
Choffray, Jean-Marie ULg

in Actes des XX Journées de la Publicité et de la Communication (1980, June)

Cet article présente une méthode nouvelle, appelée DESIGNOR, d'aide à la décision marketing. Son objectif est d'accroître la créativité au cours du processus de développement d'un nouveau produit ... [more ▼]

Cet article présente une méthode nouvelle, appelée DESIGNOR, d'aide à la décision marketing. Son objectif est d'accroître la créativité au cours du processus de développement d'un nouveau produit industriel et de réduire les risques d'échec commercial. [less ▲]

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See detailDésindustrialisation et tertiairisation : quelques observations à partir du cas de Liège
Merenne-Schoumaker, Bernadette ULg

in Bulletin de la Société Belge d'Etudes Géographiques = Tijdschrift van de Belgische Vereniging voor Aardrijkskundige Studies (1992), LXI

To understand these two processes, a case study is proposed: Liège. The ultimate objective is to measure and identify the components of the facts

Detailed reference viewed: 104 (7 ULg)
See detailDésinfection de l'eau par photosensibilisation avec les huiles essentielles de Citrus bergamia, Citrus limonum et Citrus reticulata.
Sunda, M.; Rosillon, Françis ULg; Taba, K. M. et al

in Colloque international du Gruttee, Nancy 26-28 octobre 2009 (2009)

Detailed reference viewed: 33 (11 ULg)