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Aggregate and disaggregate dynamic spatial interaction approaches to modelling coins diffusion Le Texier, Marion ; Caruso, Geoffrey in Thill, Jean-Claude (Ed.) Spatial Analysis and Location Modeling in Urban and Regional Systems (2018) With the 2002 introduction of the euro as a common currency in Europe,the possibility has emerged to assess international mobility using this new tracer, given that every coin bears a specific national ... [more ▼] With the 2002 introduction of the euro as a common currency in Europe,the possibility has emerged to assess international mobility using this new tracer, given that every coin bears a specific national side. Using a simple two-country framework, four dynamic modeling strategies were designed in order to simulate the diffusion of coins and to understand how this diffusion is affected by population size, mobility rates and coin exchange processes. Methodological implications are raised with respect to aggregation, synchronicity and stochasticity issues. Although each model converges to an equilibrium, the time to reach this end stage and the level of coin mixing in each country strongly varies with the modeling strategy. Calibration is undertaken with French data, using mobility rates as adjustment variables. The experiment shows that convergence to a perfect mix of coins can only be obtained if reciprocal exchanges are modeled, with a time horizon around 2064 - while non-reciprocal models indicate an imperfect mix converging in the year 2020 at the latest. [less ▲] Detailed reference viewed: 135 (8 UL)AGROECOLOGICS. TOWARDS A TERRITORIAL, INTEGRATIVE AGRI-URBAN DESIGN. LUXEMBOURG AS A CASE STUDY. Weichold, Ivonne Doctoral thesis (2021) This PhD thesis deals with the interrelation of the disconnected fields of urbanism, agriculture, ecology and planning. Such an attempt was inspired by a renewed relationship between the urban and ... [more ▼] This PhD thesis deals with the interrelation of the disconnected fields of urbanism, agriculture, ecology and planning. Such an attempt was inspired by a renewed relationship between the urban and agriculture, built from the perspective of agroecology and its manifestation in urban design and planning. Despite the growing interest in agricultural production in and around cities, urban planning processes are still ignoring its integration. In most instances when undeveloped land is available, neither food production nor the quality of soil have a high priority for planners and are mostly considered at the end of a planning process. While food entered the planning agenda more than a decade ago through the emergence of urban food planning, a perspective of food planning as a discipline towards an ‘urbanism’, i.e. agroecological urbanism, is still missing. Therefore, this PhD thesis is based on the conviction that urban planning should be reassessed from an agricultural perspective. In doing so, it introduces the notion of an agri-urban design, which aims to develop land with instead of against the agricultural landscape. The context of Luxembourg has been used to remedy such a missing link and propose a highly constructive and integrative planning approach that considers agriculture and its soil quality, within the planning process. The research is structured in five different methodological approaches ranging from a historical, comparative, multi-scalar case study, land-suitability towards a prospective approach. Each approach thereby builds on the findings of each other. Such a mixed-methods approach underlines the complexity and interdisciplinary nature of the different strands of urban and agricultural development. The results are subject to different validation methods, culminating in the formulation of a prospective vision of land use planning and design for the case of Luxembourg by combining agroecological principles. [less ▲] Detailed reference viewed: 104 (7 UL)AI-aided, incremental numerical approach for fi nite strain poroelasticity: On the brain tissue deformation Dehghani, Hamidreza ; Zilian, Andreas Scientific Conference (2021, May 21) Detailed reference viewed: 53 (3 UL)AI-supported Modelling of Brain tissue as Soft Multiscale Multiphysics (Poroelastic) medium Dehghani, Hamidreza ; Zilian, Andreas Presentation (2022, January) Detailed reference viewed: 12 (2 UL)ALGEBRAIC COARSE-GRAINING METHODS IN FRACTURE MECHANICS: TACKLING LOCAL LACK OF CORRELATION USING DOMAIN DECOMPOSITION ; ; et al Scientific Conference (2012, March) In this paper, we propose to couple model order reduction techniques with domain decomposition meth- ods for the solution to parametric problems of fracture. The nonlinear nature of the problems requires ... [more ▼] In this paper, we propose to couple model order reduction techniques with domain decomposition meth- ods for the solution to parametric problems of fracture. The nonlinear nature of the problems requires the use of a system approximation method to speed-up the assembly of the non-linear opreators. We show that the method efficiently computes a solution faster than a full order model for a given accuracy. The speed-up increases with the problem size. [less ▲] Detailed reference viewed: 269 (1 UL)An Algorithm to compute damage from load in composites ; Bordas, Stéphane ; et al in Frontiers of Architecture and Civil Engineering in China (2011), 5(2), 180-193 We present a new method to model fracture of concrete based on energy minimisation. The concrete is considered on the mesoscale as composite consisting of cement paste, aggregates and micro pores. In this ... [more ▼] We present a new method to model fracture of concrete based on energy minimisation. The concrete is considered on the mesoscale as composite consisting of cement paste, aggregates and micro pores. In this first step, the alkali-silica reaction is taken into account through damage mechanics though the process is more complex involving thermo-hygro-chemo-mechanical reaction. We use a non-local damage model that ensures the well-posedness of the boundary value problem (BVP). In contrast to existing methods, the interactions between degrees of freedom evolve with the damage evolutions. Numerical results are compared to analytical and experimental results and show good agreement. [less ▲] Detailed reference viewed: 124 (1 UL)All in one stroke? Intervention Spaces for Dark Patterns Rossi, Arianna ; Bongard, Kerstin E-print/Working paper (2021) This position paper draws from the complexity of dark patterns to develop arguments for differentiated interventions. We propose a matrix of interventions with a \textit{measure axis} (from user-directed ... [more ▼] This position paper draws from the complexity of dark patterns to develop arguments for differentiated interventions. We propose a matrix of interventions with a \textit{measure axis} (from user-directed to environment-directed) and a \textit{scope axis} (from general to specific). We furthermore discuss a set of interventions situated in different fields of the intervention spaces. The discussions at the 2021 CHI workshop "What can CHI do about dark patterns?" should help hone the matrix structure and fill its fields with specific intervention proposals. [less ▲] Detailed reference viewed: 136 (10 UL)Alleviating the Mesh Burden in Computational Solid Mechanics Bordas, Stéphane ; ; et al in Proceedings of ECT2010 (2010, December 12) The goal of this chapter is to review recent avenues of investigation to alleviate meshing difficulties in computational mechanics and give a few exemplar applications. Keywords: meshing; enrichment ... [more ▼] The goal of this chapter is to review recent avenues of investigation to alleviate meshing difficulties in computational mechanics and give a few exemplar applications. Keywords: meshing; enrichment; meshfree methods; extended finite element methods; isogeometric analysis; advanced remeshing techniques. [less ▲] Detailed reference viewed: 474 (3 UL)Almost global convergence to practical synchronization in the generalized Kuramoto model on networks over the n-sphere Markdahl, Johan ; Proverbio, Daniele ; et al in Communications Physics (2021), 4 From the flashing of fireflies to autonomous robot swarms, synchronization phenomena are ubiquitous in nature and technology. They are commonly described by the Kuramoto model that, in this paper, we ... [more ▼] From the flashing of fireflies to autonomous robot swarms, synchronization phenomena are ubiquitous in nature and technology. They are commonly described by the Kuramoto model that, in this paper, we generalise to networks over n-dimensional spheres. We show that, for almost all initial conditions, the sphere model converges to a set with small diameter if the model parameters satisfy a given bound. Moreover, for even n, a special case of the generalized model can achieve phase synchronization with nonidentical frequency parameters. These results contrast with the standard n = 1 Kuramoto model, which is multistable (i.e., has multiple equilibria), and converges to phase synchronization only if the frequency parameters are identical. Hence, this paper shows that the generalized network Kuramoto models for n ≥ 2 displays more coherent and predictable behavior than the standard n = 1 model, a desirable property both in flocks of animals and for robot control. [less ▲] Detailed reference viewed: 71 (1 UL)An alternative alpha finite element method (AαFEM) for free and forced structural vibration using triangular meshes ; ; et al in Journal of Computational and Applied Mathematics (2010), 233(9), 2112-2135 An alternative alpha finite element method (AαFEM) using triangular elements is proposed that significantly improves the accuracy of the standard triangular finite elements and provides a superconvergent ... [more ▼] An alternative alpha finite element method (AαFEM) using triangular elements is proposed that significantly improves the accuracy of the standard triangular finite elements and provides a superconvergent solution in the energy norm for the static analysis of two-dimensional solid mechanics problems. In the AαFEM, the piecewise constant strain field of linear triangular FEM models is enhanced by additional strain terms with an adjustable parameter α which results in an effectively softer stiffness formulation compared to a linear triangular element. The element is further extended to the free and forced vibration analyses of solids. Several numerical examples show that the AαFEM achieves high reliability compared to other existing elements in the literature. [less ▲] Detailed reference viewed: 93 (0 UL)An alternative alpha finite element method with discrete shear gap technique for analysis of isotropic Mindlin-Reissner plates ; ; et al in Finite Elements in Analysis and Design (2011), 47(5), 519-535 An alternative alpha finite element method (AαFEM) coupled with a discrete shear gap technique for triangular elements is presented to significantly improve the accuracy of the standard triangular finite ... [more ▼] An alternative alpha finite element method (AαFEM) coupled with a discrete shear gap technique for triangular elements is presented to significantly improve the accuracy of the standard triangular finite elements for static, free vibration and buckling analyses of MindlinReissner plates. In the AαFEM, the piecewise constant strain field of linear triangular elements is enhanced by additional strain terms with an adjustable parameter α which results in an effectively softer stiffness formulation compared to the linear triangular element. To avoid the transverse shear locking, the discrete shear gap technique (DSG) is utilized and a novel triangular element, the Aα-DSG3 is obtained. Several numerical examples show that the Aα-DSG3 achieves high reliability compared to other existing elements in the literature. Through selection of α, under or over estimation of the strain energy can be achieved. [less ▲] Detailed reference viewed: 118 (2 UL)L'ambition métropolitaine: clé vers un aménagement du territoire transfrontalier en Grande Région SaarLorLux? Evrard, Estelle ; Schulz, Christian in L'information géographique (2015), 79 Detailed reference viewed: 248 (12 UL)Anaerobic mono-digestion of maize and cellulose at different temperatures and operating modes Golkowska, Katarzyna Doctoral thesis (2011) Detailed reference viewed: 141 (5 UL)Analogies to Succeed: Application to a Service Design Problem Moreno Grandas, Diana Paola ; ; Blessing, Lucienne et al in Laakso, Miko; Ekman, Kalevi (Eds.) NordDesign 2014 Conference (2014, August) This study aims to expand current understanding of ideation methods and its transferability from product design domain to service design domain. It applies two Design-by-Analogy (DbA) ideation methods ... [more ▼] This study aims to expand current understanding of ideation methods and its transferability from product design domain to service design domain. It applies two Design-by-Analogy (DbA) ideation methods (WordTree and SCAMPER) to a real service design problem in an expert participants setting. Quantity and Novelty metric results are analysed along with design fixation effects. Both DbA methods produced statistically significant larger number of novel ideas when compared to the control. The number of novel ideas with SCAMPER method doubled those generated via WordTree. Fixation effects were counterintuitive since SCAMPER appears to be a method that promotes both fixation and de-fixation effects. These findings suggest DbA ideation methods offer positive capabilities for assisting designers to generate solutions for service design problems. [less ▲] Detailed reference viewed: 190 (21 UL)Analyse prozessbezogener Einflussfaktoren zur Steigerung der Robustheit von Produktenwicklungsprojekten Gericke, Kilian ; Blessing, Lucienne in Proceedings of 17th Symposium Design for X (2006) Auf Basis des Konzeptes der Robustheit von Produktentwicklungsprojekten werden Effekte dargelegt, die zu Planungsabweichungen führen. Das Konzept wird durch eine Diskussion der Erfolgskriterien von ... [more ▼] Auf Basis des Konzeptes der Robustheit von Produktentwicklungsprojekten werden Effekte dargelegt, die zu Planungsabweichungen führen. Das Konzept wird durch eine Diskussion der Erfolgskriterien von Projekten und möglichen Ansatzpunkten zur Steigerung der Robustheit umrissen. Als Ergebnis einer Literaturstudie wurden Problemschwerpunkte hinsichtlich der Ursachen von Planungsabweichungen und deren Erscheinungsformen identifiziert. Auf Grundlage dieser Studien lassen sich jedoch keine Ansätze zur Steigerung der Robustheit von Produktentwicklungsprojekten ableiten. Die Betrachtung der Studien bildet den Ausgangspunkt für eigene Untersuchungen, die zu einem besseren Verständnis der Ursachen von Planungsabweichungen in Produktentwicklungsprojekten und zur Ableitung von Handlungsempfehlungen führen sollen. [less ▲] Detailed reference viewed: 61 (0 UL)Analysing Product Modelling Approaches Across Domains - Supporting Communication in Interdisciplinary Design Teams Eisenbart, Boris ; Gericke, Kilian ; Blessing, Lucienne Poster (2011) Detailed reference viewed: 138 (3 UL)Analysis and modelling of the noise generation during vibratory pile driving and determination of the optimization potential Hanus, Vincent Doctoral thesis (2010) Impact driving, pressing and vibrodriving are the three main methods to drive sheet piles. The sound level generated during vibrodriving varies almost between the very high level of an impact driving and ... [more ▼] Impact driving, pressing and vibrodriving are the three main methods to drive sheet piles. The sound level generated during vibrodriving varies almost between the very high level of an impact driving and the lowest sound level of a pressing. In the first part of this doctoral thesis, sound measurements feasibility is thoroughly studied. Particular attention is paid to the measurement conditions on construction sites and to the measurement methods (sound power level, beamforming and thermography). These methods are outlined and the provided results are compared. In addition, the different causes of noise are analysed and the influence of various parameters is quantified. In the second part, the acceleration measurements of the full-scale experiments are used to calibrate a Finite Element model. A parametric study analyses how the most important mechanical parameters influence the noise level. This research has shown that a decrease of the noise generation on construction sites can be obtained by two ways: by recommendations for installation of sheet piles at the construction site, and by requirement of constructive measures that significantly reduce the noise level. [less ▲] Detailed reference viewed: 141 (11 UL)Analysis and Visualisation of Project Structure using Linkography: Focussing Project Risk Management Gericke, Kilian ; ; Blessing, Lucienne in Proceedings of the ASME 2009 International Design Engineering Technical Conferences & 21st International Conference on Design Theory and Methodology IDETC/DTM 2009 (2009) Product development projects are difficult to plan due to complexity, dynamics, lack of transparency and polytely. Risk Management is often used to cope with this situation. Linkography is adapted with ... [more ▼] Product development projects are difficult to plan due to complexity, dynamics, lack of transparency and polytely. Risk Management is often used to cope with this situation. Linkography is adapted with the aim to ease the effort of the Risk Management process. Linkography is used to focus all Risk Management activities on those work packages which might affect the project the most in the case of failing the expected outcome. The criticality of a work package is defined by the number of links to other work packages, its duration and its costs. By applying Linkography as a Risk Management method, a prioritized list of work packages can be generated which pass consecutively through the usual Risk Management process. Unlike other methods, Linkography supports the user in a visual manner. Hence, Linkography can easily be used for communication with unskilled stakeholders. [less ▲] Detailed reference viewed: 95 (0 UL)Analysis of a blast furnace behaviour through a resolving euler-lagrange approach Peters, Bernhard ; Rousset, Alban ; Besseron, Xavier Scientific Conference (2021, October) Detailed reference viewed: 25 (2 UL)Analysis of biochemical networks using linear programming Simeonidis, Vangelis ; ; et al in Proceedings of the 7th World Congress of Chemical Engineering on CD-ROM (2005, December) The application of mathematical programming methodologies to biochemical systems is demonstrated with the presentation of a linear programming (LP) algorithm for calculating minimal pathway distances in ... [more ▼] The application of mathematical programming methodologies to biochemical systems is demonstrated with the presentation of a linear programming (LP) algorithm for calculating minimal pathway distances in biochemical networks. Minimal pathway distances are identified as the smallest number of steps separating two nodes in the network. Two case studies are examined: 1) the minimal distances for Escherichia coli Small Molecule Metabolism (SMM) enzymes are calculated and their correlations with genome distance and enzyme function are considered; 2) a study of the p53 cell cycle and apoptosis control network is performed in order to assess the survivability of the network to both random node failures and a directed assault, by studying the modification of the network’s diameter for successive protein knockouts. The results verify the applicability of the algorithm to problems of biochemical nature. [less ▲] Detailed reference viewed: 97 (3 UL) |
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