1 Sep :52:13 Research projects ( of 5444) Search filter: Classifications: TECHNOLOGICAL SCIENCES (T) Optimal Control of Energy Extraction in Large-eddy Simulation of Wind Farms Abstract: No English Abstract and Energy Conversion Johan Meyers Jay Goit Optimal Control in Renewable Energy Generators with Strong Variable Input Power Abstract: Modern renewable energy generators have to deal with a strong irregular power input making it difficult for the controller to obtain a maximum power output. This project will study an enhanced controller for the electrical drive that takes into account the input power variation and the dynamic behavior of the generator on these variations. Departement of Electrical energy, systems and automation Lieven Vandevelde Optimal Control in Computational Geometry Abstract:? ESAT - STADIUS, Stadius Centre for Dynam Moritz Diehl Hong Trang Le Optimal buildings towards intelligent energy networks. Abstract: As a current recast of the EU-legislation 2002/91/EG obliges to build nearly zero-energy buildings by 2020, an increased implementation of distributed sources of renewable energy and an intelligent energy network becomes a condicio sine qua non. The doctoral research focuses on the required transdisciplinary focus of building energy conservation at districtlevel.three goals are set. The first objective treats a bottom-up local energy service (BLUES) model describing the building service demandat both the scale of a building zone, a single building and a building district determined by the mesoscales diversity in population and typology. The BLUES model aims to bridge urban planning and development on theone hand, and thermal and electric district engineering on the other hand having building physics in-between. The implementation of the model will - together with complementary parallel research at other departmentsdealing with both thermal and electrical energy - result in an integrate Department of Civil Engineering Dirk Saelens Ruben Baetens Optimaal ontwerp van vakwerkschalen. Abstract: No English Abstract Architectural Engineering Geert Lombaert Mattias Schevenels Optimaal geometrisch en kinematisch ontwerp van ontplooibare schaar- en plaatstructuren voor architecturale toepassingen Abstract: Deployable scissor structures can transform between a very compact fully folded state and an expanded state in which they exercise their function. This attribute makes them ideal as lightweight, mobile and temporary structures, for which reusability, compact transportation and a fast deployment and removal are key. They're also fit for adding dynamic parts to static constructions. Possible applications include emergency shelters, temporary structures for (travelling) events or exhibitions, transformable roofs and canopies, adaptable façades, etc. Scissor structures consist of a linkage of scissor elements which are formed by two bars interconnected by a pivot hinge. Depending on the proportions and shape of these bars, it is possible to distinguish three basic types: translational, polar and angulated scissor elements . Many geometrical models for scissor structures have been proposed throughout the years, yet most of them are based on shapes with rather simple curvature, like a sphere or a cylinder. In a search for new shapes, research was conducted to unravel the mathematical principles behind angulated scissor structures, which still held a large unrevealed potential for innovative geometries . What started as a study on Hoberman's deployable helicoid , resulted in a theory which allows to convert an arbitrary continuous surface into an angulated scissor structure. Thus a world of new possibilities was opened. The theory was tested on various surfaces and families of surfaces. The surfaces of revolution and the moulding surfaces showed particularly good qualities as a base geometry and added the possibility to apply this theory in a generic manner (figure 1). This paper reviews the theory on angulated elements, covering the different design steps required to create a scissor structure based on a certain surface, each time focusing on the underlying mathematical principles. These steps include the discretisation of the surface through the usage of principal curvature lines and the design of a theoretical line model of the scissor structure through a set of parametric equations. To highlight the good design choices within this broad range of new possibilities, the optimisation of the geometrical models and their kinematic behaviour are also discussed.
2 Architectural Engineering Niels DE TEMMERMAN Optical trapping and vibrational analysis of single molecules. Abstract: The aim of this FWO research project is the development of a technologythat enables to examine the chemical properties of single molecules. The study of (bio)molecules will be carried out by using surface enhanced Raman scattering (SERS), an optical technique which probes the vibrational states of molecules inside a hot spot, giving information about theirchemical composition. To achieve single molecule detection, optical tweezers will be applied to manipulate the molecules inside the hot spot with nanometer accuracy. The first objective of this project is to design,fabricate and characterize metallic nanostructures that can be used as SERS substrates. Focus will go to the development of elevated planar plasmonic structures with a high electric field enhancement factor. The second objective of this project involves SERS measurements on molecules manipulated by optical tweezers on the aforementioned plasmonic nanostructures. Binding molecules to micronsized beads will allow us to scan t Solid State Physics and Magnetism Sectio Liesbet Lagae Pieter Neutens Optical switching in broadband communications: components and networks Abstract: There is currently an increasing demand for higher capacity and flexibility in telecommunication networks. One of the key technologies of the future will be optical switching (in space, time and wavelength). This switching can be used inside a switching node or it can be used as an additional degree of freedom in the network multiplexing and routing strategy. The major goal of this project is to study the optimal use of optical techniques in broadband networks. This includes the development of optimal components and the design of optimal network configurations. Electronics and Informatics ROGER VOUNCKX Optical star networks for avionics applications - AVIOSTAR Abstract: Abstract (max. 60 woorden): This project supports the development of transceivers for optical star networks to be used in avionics applications. In airplanes there is a growing need for optical networks as physical layer for safety critical communication as increasing Electromagnetic Compatibility (EMC) issues in airplanes require optical solutions to replace copper based wiring. Optical solutions are also cheaper, and lighter. Departement of Information technology Johan Bauwelinck Optical simulation, modeling and evaluation of 3D medical displays Abstract: The aim is to build a simulation model able to predict, by means of ray-tracing, how images that are presented on a three-dimensional display are transferred to the retina of the human visual system and to develop a human visual system model to assess the perceived image quality and a numerical observer model to assess clinical performance. Departement of Electronics and information processing Patrick De Visschere Optical properties of nanostructured organic materials based on carbon nanotubes. University of Antwerp Abstract: The objectives of the study are: 1) To apply advanced optical techniques to the isolated CTN's in liquid and solid solution to get a better understanding of the electronic and optical properties of CNT's. 2) To develop a reliable characterization method using these optical techniques, for analyzing the composition of CNT materials. 3) To prepare composites of the individually dissolved CNT's with other molecules and polymers, and study the interactions occurring in these. Experimental condensed matter physics (ECM) Etienne Goovaerts Wim Wenseleers Optical Networks : Towards Bandwidth Manageability and Cost Efficiency (acronym : e-photon/one) Abstract: The proposed Network of Excellence (NoE) aims at integrating and focusing the rich know-how available in Europe on optical communications and networks, both in universities and in research centres of major telecom manufacturers and perators. Optical Networks : Towards Bandwidth Manageability and Cost Efficiency (acronym : e-photon/one). Departement of Information technology Geert Morthier Mario Pickavet Optical networks: performance analysis, optimization and control by means of analytic modeling (FWO-postdoc Wouter Rogiest)
3 Abstract: We study algorithms for flexible switching in optical packet-switched networks. By means of queueing models and analytic optimization techniques we evaluate the performance of existing algorithms. This characterization allows to propose modified algorithms, interacting flexibly with the instantaneous variations of traffic over the network. Departement of Telecommunications and information processing Herwig Bruneel Optical Networking and Node Architecture. University of Antwerp Abstract: The project goal is to contribute to the development of next generation transport networks using optical technologies. The focus will be on the networking aspects. It is envisaged that IP will be the convergence layer of future multimedia traffic, including the classical IP based data traffic and the classical telephony traffic. A clear understanding of optical circuit switched networks will be obtained. Major results will be obtained in the field op control architecture and routing strategies (for different network architectures). Resilience strategies will be developed and evaluated in great detail. A better understanding of optical packet switched networks will be obtained. Major emphasis will be on the node architectures. The partners are confident that it will be possible to analyse the specific queueing models necessary to evaluate the performance of optical packet switched networks by extending the techniques already developed in the past for other types of communication networks. Also a comparison between packet and circuit switched optical networks will be performed. A planning approach will be developed to support operators and vendors in strategic decisions concerning future network architectural options. Performance analysis of telecommunications systems (PATS) Modeling Of Systems and Internet Communication (MOSAIC) Christian Blondia Optical measurement techniques for fluids and structures. Abstract: Matching FWOAL501: Experimental and numerical study of the slamming wave impact on deformable composite structures. The aim of this project is the experimental and numerical study of wave impact on deformable composite structures. The objectives are threefold: Carrying out extensively instrumented slamming tests on deformable composite structures, including the monitoring of the resulting instantaneous deformations and the damage and stiffness degradation of the composite material, The numerical simulation of the dynamic pressures that act in the interface between the composite structure and the water volume, including the fluid structure interaction (FSI) (effect of the deformation of the composite structure on the instantaneous pressure distribution in the water and viceversa) and the effect of the local peak pressure on the local deformation (and possibly dammage) of the composite structure, the parametric study of the effct of the geometrical and mechanical properties of the composite structure (thickness, curvature, stiffness) on the local peak pressures and the slamming phenomenon. STEVE VANLANDUIT Optical interface for active nanophotonic components: theoretical and experimental study Abstract: In the research project, coupling structures between optical fiber and nanophotonic components in bonded InP-membranes are being designed, fabricated and characterized. Important boundary conditions of these couplers are high efficiency and polarization independence through polarization diversity. These passive membrane structures will be integrated with active functionality. In a first approach, coupling structures will be integrated with wavelength monitors and photodetectors. Departement of Information technology Roeland Baets Dries Van Thourhout Optical design of structured organic light-emitting diodes and other light-emitting components Abstract: IWT/SB-lichting 2014 IWT/SB/Michiel Callens/ Optical design of structured organic light-emitting diodes and other light-emitting components Departement of Electronics and information processing Kristiaan Neyts Optical Charge Pumping Method for Amorphous Oxide Thin Film Transistors Abstract: Thin film transistors are used as pixel driving elements for active matrix displays (AM-LCD or AMOLED). Currently amorphous silicon is used asthe channel layer but it has many disadvantages like low mobility, high temperature processing and high photosensitivity. Low temperature deposition is needed for it to be integrated with the display screen. One alternative is to use low temperature Polysilicon TFTs as they have higher mobility. But the field of large area electronics requires good device uniformity and cost effective fabrication and poly Si TFT doesn#t have this benefits.
4 Amorphous oxide semiconductors are being investigated for this purpose as they show improved mobility over the existing a-si TFT. The other advantages are low temperature processing and optical transparency and steep subthreshold slope. Because of room temperature processing they are ideally suited for transparent and flexible electronics. The majority carriers are electrons due to the oxygen intersti ESAT - MICAS, Microelectronics and Senso Paul Heremans Guido Groeseneken Ajay Sampath Bhoolokam Optical characterizing of materialsurface by means of spectroscopic infra-red ellipsometric. Abstract: Infrared spectroscopic ellipsometry is the latest development in the field of optical measurement systems. The new technique can be regarded as the direct extension of well-known FTIR-Reflection Absorption Spectroscopy (FTIR-RAS) and hence disposes of all the advantages of its predecessor, e.g. sensitivity and accuracy in the elucidation of the composition of organic and inorganic matter. Coupling SE with the infrared opens up completely new perspectives for the characterization of material surfaces. Indeed, ellipsometry measures the polarization change instead of only the intensity of the reflected light, and yields therefore quantities for both the amplitude and the phase change of the reflected light. The phase information is additional to FTIR-RAS and enables the accurate determination of e.g. film thicknesses or the localization of regions with different optical properties within a single coating. The major activities of the Dept. Metallurgy, Electrochemistry and Materials Science consist in the investigation of thin films on metal surfaces, e.g. anodic or chemical conversion films on aluminium, thin supraconductive films on substrates, and thin polymer films on metals. More specifically, the characterization of the film structure and the understanding of the mechanisms which yield a particular structure are envisaged. For more than five years now optical reflection techniques, i.e. spectroscopic ellipsometry around the visible spectrum (VIS-SE), FTIR-RAS and Raman spectroscopy, are used for these purposes. The aim of the current project is to use the new technique, IR-SE, for the same type of basic research. In particular it is expected that the new technique will resolve some previous restrictions. The major arguments for using IR-SE to investigate thin films on metal surfaces are : 1. the potential to characterize thicker films than with VIS-SE, owing to the extended penetration depth of the light; 2. the potential to characterize thinner films than with FTIR-RAS, owing to the additional phase information in a wide spectral interval; 3. long wavelenghts suffer less from scattering effects, hence IR-SE should enable the characterization of rougher surfaces compared to VIS-SE; 4. owing to the extra phase information, detected chemical species can be located within the film as a function of depth Owing to these new features, the application of optical techniques for the characterization of industrial material is envisaged, e.g. as-rolled or grained surfaces covered with protective coatings. However, the proposed technique can also be applied within very different applications. Indeed, for several years now spectroscopic ellipsometry is succesfully applied in microelectronics for the non destructive depth profiling of multilayer structures. Furthermore the technique is exceptionally suitable to characterize the optical properties of various materials. trefwoordeninfrarood, spectroscopische ellipsometrie, dunne lagen, karakterisering,niet destructief, optische eigenschappen, oppervlakteanalyse Metallurgy, Electrochemistry and Materials Science JEAN VEREECKEN Optical characterization of material surfaces with spectroscopic ellipsometry in the range from the visual to the far infrared spectrum Abstract: This project aims at the non destructive characterization of the microscopic characteristics of modified metal surfaces, i.e. composition, structure and morphology, by optical means. Spectroscopic ellipsometry enables the accurate determination of the optical properties of the targeted surfaces. The ellipsometric data can be subsequently interpreted in terms of surface characteristics by means of advanced dataprocessing procedures. This methodology will be applied to characterize very thin films on metal surfaces, with a thickness ranged between about 1 and 100nm. Hence a variety of thin film systems, including passive films, chemical and electrochemical conversion films as sell as very thin polymer coatings, are covered.this type of investigations will be carried out using the widest spectral range available for spectroscopic ellipsometry. The use of SE in the infrared enables the elucidation of the molecular surface composition. SE from the near UV to the near IR, i.e. including the visual spectrum, is highly sensitive to the presence of very thin films and can also be used in situ for electrochemical studies. The practical use of these investigations are located in the field of applications like electrochemistry (e.g. corrosion), surface engineering and process control. Physical Chemistry and Polymer Science Metallurgy, Electrochemistry and Materials Science Applied Physics and Photonics JEAN VEREECKEN IRINA VERETENNICOFF BRUNO VAN MELE Optical Characterization and Modeling of Bulk Scattering and Luminescence Abstract: Fluorescent materials owe their typical color to the fact that they as opposed to non-fluorescent materials are able to absorb light and reemit it with a different color. These materials are therefore more easily noticed and are for this reason frequently used in safety vests and fluorescent markers.next to this visual application, fluorescent materials are also used in lighting, displays, and solar applications, where the color spectrum can be adapted to improve to color characteristics or the efficiency of the applications. A good model describing the behavior of light in fluorescent materials is essential for the optimization of these applications.during the doctoral research a number of models and characterization techniques for fluorescent materials were studied. A method based on adding-doubling calculations was extended forfluorescent materials. This method has the advantage that it is very fast, however it imposes a number of geometrical restrictions. An alternative meth ESAT - ELECTA, Electrical Energy and Com Geert Deconinck Guy Durinck Sven Leyre
5 Optical characterisation of stresscomponents in All-ceramic facings. Abstract: At the onset of this study in 1996, the intended purpose was to enter into a form of collaboration (SMAF-TONA-STRU) to use the knowhow and the expertise in the field of photonic instrumentation (optical fibre sensors for stresses and strains -TONA/TW), stress analysis (finite components modelling) and experimental matrial characterisation (structure determination- STRU) to support the clinical research in the field of dentistry and stomatology (Stomatology Maxillo-Facial surgery SMAF). The aim of this project is to consolidate this work, by further investigation of the mechanisms at hand and by building a compact polarimetric optical sensor. The experimantal results will be confronted with the traditional measurements. This work can have a great importance to the development of new tooth cements. Applied Physics and Photonics HUGO THIENPONT Optical Burst Switched Networks for Massively Scalable consumer Grids Abstract: Consumer grids allow end-users to execute (parts of) their applications on remote, network-connected systems. Inthis porject, several algorithms to support anycast routing will be developed, complemented by protocols for the dissemination and aggregation of resources' state information. A second topic is the dimensioning of such grid networks. The most important paramters are scalability, reliability, and the efficient usage of existing infrastructure. Departement of Information technology Bart Dhoedt Piet Demeester Optical and electrical modeling of thin film solar cells Abstract: Optical and electrical modeling of polycrystalline thin film solar cells, especially those based on Cu-In-Ga-S-Se absorber materials. Comparison with advanced electrical and optical measurements. Study of optical reflection, transmission, scattering, absorption, and of electrical behaviour (current-voltage, impedance, spectral response). In relation to cell structure and material parameters. Departement of Electronics and information processing Marc Burgelman Opstartfase voor infrastructuur voor conditiemonitoring en levensduurtesten, bedrijfs- en onderhoudsstrategieên voor offshore windparken. Abstract: No English abstract PATRICK GUILLAUME Opportuniteiten en hindernissen bij het innovatief gebruik van de meergrijperweeftechnologie University College Ghent Abstract: Het project heeft tot doel een aanzet te geven tot reconversie van het enorme arsenaal aan meergrijpergetouwen die in Vlaanderen staan opgesteld en dat momenteel bijna uitsluitend wordt gebruikt voor de productie van interieurstoffen. Sinds enkele decennia bestaat de markt van driedimensionale textielstructuren (3D-textielstructuren), welke vooral is gericht op technische toepassingen. De snelst groeiende toepassing is momenteel deze van gebruik in composietmaterialen. De 3D-textielstructuren kunnen geproduceerd worden volgens verschillende technologieën. 3D-weefsels is één hiervan en volgens de recente literatuur groeit deze aan belang. Vanuit textieltechnologisch standpunt bekeken lijkt meergrijpertechnologie zoals toegepast in dubbelstukgetouwen de meest aangewezen technologie. Gezien het feit dat de sector van interieurtextiel momenteel een crisis doormaakt door tanende markten in Arabische landen en het voormalige Oostblok dringt enige technologische reconversie zich op. Dit project heeft als doel hiertoe een belangrijke aanzet te geven. Overschakeling van interieur naar technisch textiel vergt een vrij grote omscholing, niet alleen technologisch maar meer nog organisatorisch en naar bedrijfsmentaliteit toe. Dit project moet daar zeker toe bijdragen. In de gebruikersgroep wordt een amalgaam gevormd van zowel dubbelstukwevers als bedrijven die deze technologie niet in huis hebben maar een ruime ervaring bezitten in de markt van technisch textiel met daarnaast de lokale constructeur van dergelijke getouwen, de twee academische onderzoekscentra voor textielonderzoek en het onderzoekscentrum voor composietmaterialen van Sirris. Het succes van het project zal kunnen gemeten worden aan het aantal producten dat door de Vlaamse wevers additioneel op de markt is gebracht na beëindigen van het project en het aantal wevers dat reeds een overschakeling heeft gemaakt. Door de weefproeven uit te voeren binnen de faciliteiten van de deelnemende wevers is er reeds een directe valorisatie en omscholing tijdens de uitvoering van het project zelf. De resultaten zullen echter gebruikt worden om via publicaties, presentaties en workshops in binnen- en buitenland de bredere doelgroep van Vlaamse wevers aan te zetten om tijdig productinnovatie te starten en de nieuwe producten kenbaar te maken aan potentiële afnemers. Last but not least zal de opgebouwde kennis aan de Hogeschool en de Universiteit worden doorgegeven aan de textielstudenten, die de toekomstige kaderleden van de Vlaamse textielbedrijven zijn. Faculty of Applied Engineering Sciences Department of Textile technology Filip Ghekiere Geert De Clercq Gregory Haezebrouck Opmaken van een CO2-balans van de volledige productie keten vanaf de teelt van biomassa tot aan de eindproducten.
6 Abstract: Opmaken van een CO2-balans van de volledige productie keten vanaf de teelt van biomassa tot aan de eindproducten. JACQUES DE RUYCK Svend BRAM Operation and control of power systems with high penetration of PV and low grid inertia Abstract: The power system is facing some tremendous challenges for the next decades to come. While dealing with aging infrastructure and an ever increasing demand for electric power, the projected increase of electric power coming from renewable energy sources will put an even higher stress to the already highly loaded power systems. From a power system perspective,this dispersed renewable electricity generation behaves quite differentfrom traditional, centralized generation facilities. Apart from their intermittent nature, most of these sources are characterized by their lack of inertia. This system inertia is often considered as one ofthe vital system parameters upon which the synchronized operation of current day power systems is based: The inertia in the rotating masses of synchronous generators determines the frequency response with respect toinequalities in the overall power balance. The lower this system inertia, the more nervous the grid frequency reacts on abrupt changes in generation ESAT - ELECTA, Electrical Energy and Com Ronnie Belmans Dirk Van Hertem Pieter Tielens Operational modal analysis using transmissibility measurements Abstract: Operational Modal Analysis (OMA) allows modal parameters to be estimated in operational conditions based on output measurements only. It is usually assumed that the (unknown) operational forces are white noise sources. Recently, an innovative new approach based on transmissibility measurements has been proposed at the that does not require this assumption. This new approach makes it possible to apply OMA in the presence of arbitrary operational forces (colored noise, impacts,...). Despite the excellent results obtained so far there is a need for more basic research in order to continue to refine this approach and correctly position it in relation to other OMA methods and "Blind" system identification techniques. Another recent development in the field of Operational Modal Analysis (OMA) introduced by the Vrije Universiteit Brussel is the OMAX concept (FWO-research project (G )). The main advantage of the OMAX concept is the fact that it combines the advantages of Operational and Experimental Modal Analysis: ambient (unknown) forces as well as artificial (known) forces are processed simultaneously resulting in improved modal parameters. Therefore another topic of research in this project will be the integration of the transmissibility-based output-only approach into the input/output OMAX concept. Christof DEVRIENDT PATRICK GUILLAUME Operational modal analysis and structural health monitoring using transmissibility measurements and fiber sensor technology Abstract: Operational Modal Analysis allows identifying the dynamic behavior of structures in operational conditions. In my previous and ongoing research a new OMA approach based on transmissibility measurements was proposed that increases the reliability and applicability of OMA techniques. The goal of structural health monitoring (SHM) is to detect damage before it becomes critical for the structure's integrity. In my previous research a promising approach based on transmissibility measurements for detecting and locating damage in changing operational conditions was proposed. The first promising steps have been made and transmissibility functions have proven to be very useful in the field of OMA and SHM. However, there are definitely a number of aspects that require more study and suggest a natural direction for future work. I also believe that, both in the field of OMA and SHM, the biggest leap forward will be made by investigating the combination of the above techniques with enhanced and innovative measurement systems, such as the Laser Doppler Vibrometer and fibre optic sensors. Finally the testing and monitoring of wind turbines are considered as one of the most relevant industrial applications of the proposed techniques and definitely require further investigation. Christof DEVRIENDT PATRICK GUILLAUME Operational characterization of biomass Abstract: The research institute 'VUB' and the 'Université Catholique de Louvain + Electrabel' have entered into a service-agreement concerning the project' Operational characterization of biomass'. The research results can be transferred to the company, there can be a reasonable return in case of commercialisation or there is another kind of agreement on intellectual property, as outlined in the concluded agreement. Francesco CONTINO OPERA4FEV: OPerating RAck For Full-Electric Vehicle Abstract: The OPERA4FEV project aims to develop thermoplastic battery racks on two functional demonstrators: one for a large scale vehicle from FIAT and one for a "niche" car, the F-City from FAM.To improve deployment of electrical vehicles in Europe, large scale production processes for Rack and electrical components need to be developed. The innovative solutions proposed by OPERA4FEV will integrate electrical, hydraulic connections and component housing in a thermoplastic approach to reduce cost, weight and assembly time.in order to show the relevance of the solution and meet strong industrial benefits, the two thermoplastics racks will be manufactured and assembled with industrial means.