263 research outputs found
Data of Micromechanics-based material networks revisited from the interaction viewpoint; robust and efficient implementation for multi-phase composites
No full textData related to the publication (we would be grateful if you could cite the paper in the case in which you are using the data)
title = "Micromechanics-based material networks revisited from the interaction viewpoint; robust and efficient implementation for multi-phase composites",
journal = "European Journal of Mechanics - A/Solids",
year = "2022",
volume = "91",
pages = " 104384 ",
doi = "https://doi.org/10.1016/j.euromechsol.2021.104384",
author = "Nguyen, Van Dung and Noels, Ludovic"Van Dung Nguyen is a Postdoctoral Researcher at the Belgian National Fund for Scientific Research (FNRS
Ludovic-Mohamed Zahed’s Universal Performance of French Citizenship and Muslim Brotherhood
No full textIn this chapter, I present the life and work of Ludovic-Mohamed Zahed, who is the founder of three non-profit associations over the past several years: Les Enfants du Sida (2006), Homosexuels musulmans de France (HM2F) (2010), and Musulman-es Progressistes de France (2012). He is also the author of Révoltes extraordinaires: un enfant du sida autour du monde (2011) and Le Coran et La Chair (2012), and co-author of Queer Muslim Marriage (2013). During the last few years, the French media have covered his same-sex marriage in Cape Town to husband Qiyaam Jantjies-Zahed in 2011, the publication of his book, Le Coran et La Chair in 2012, as well as and his creation of La Mosquée inclusive de l’Unicité, the first “gay friendly” or inclusive mosque in Paris, in 2012.</p
Development of a chromatographic separation method hyphenated to electrospray ionization mass spectrometry (ESI-MS) and inductively coupled plasma mass spectrometry (ICP-MS) : application to the lanthanides speciation analysis
No full textCes travaux de thèse concernent les développements d'une méthode de séparation chromatographique couplée simultanément à l'ESI-MS et l'ICP-MS afin de réaliser l'analyse de spéciation exhaustive des lanthanides en phase aqueuse représentative des phases de désextraction des procédés de traitement du combustible usé. Cette méthode analytique permet de séparer, caractériser et quantifier des complexes de lanthanides à ligands polyaminocarboxyliques comme le DTPA et l'EDTA, utilisés comme agents complexants dans ces procédés. La méthode de séparation par chromatographie HILIC des complexes de lanthanides a été mise au point avec la phase stationnaire à fonctions amide. Un criblage d'une large gamme de compositions de phase mobile a permis de déterminer que le mécanisme d'adsorption est prédominant lors l'élution des complexes de lanthanides et d'obtenir des conditions de séparation optimisées. Des conditions d'analyse plus rapides obtenues avec une colonne à fonctions amide de granulométrie sub-2 µm et de longueur plus faible ont permis de réduire le temps d'analyse d'un facteur 2,5 et la consommation de solvant de 25 %. La caractérisation structurale et isotopique par HILIC ESI-MS a été réalisée ainsi que la mise au point d'une méthode d'étalonnage externe. Les performances analytiques de la méthode de quantification ont été déterminées. Enfin, le développement d'un système de couplage de l'HILIC à l'ESI-MS et l'ICP-MS a été réalisé. Une méthode de quantification simultanée par ESI-MS et par ICP-MS a permis de déterminer la distribution quantitative des espèces en solution ainsi que les performances analytiques associées.This work focuses on the development of a chromatographic separation method coupled to both ESI-MS and ICP-MS in order to achieve the comprehensive speciation analysis of lanthanides in aqueous phase representative of back-extraction phases of advanced spent nuclear fuel treatment processes. This analytical method allowed the separation, the characterization and the quantitation of lanthanides complexes holding polyaminocarboxylic ligands, such as DTPA and ETDA, used as complexing agents in these processes. A HILIC separation method of lanthanides complexes has been developed with an amide bonded stationary phase. A screening of a wide range of mobile phase compositions demonstrated that the adsorption mechanism was predominant. This screening allowed also obtaining optimized separation conditions. Faster analysis conditions with shorter amide column packed with sub 2 µm particles reduced analysis time by 2.5 and 25% solvent consumption. Isotopic and structural characterization by HILIC ESI-MS was performed as well as the development of external calibration quantitation method. Analytical performances of quantitation method were determined. Finally, the development of the HILIC coupling to ESI-MS and ICP-MS was achieved. A simultaneous quantitation method by ESI-MS and ICP-MS was performed to determine the species quantitative distribution in solution. Analytical performances of quantitation method were also determined
Les defis du developpement local au Senegal
No full textThis book is an uncompromising analysis of Senegal's decentralisation policy in rural areas. It discusses the state's inability to promote local development, despite this being its main raison d'?tre in a context of poverty. To identify reasons for the shortcomings, the author goes beyond policy statements and explores, sociologically, the compatibility of the behaviour and the cultural context of actors with the pursuance of local development objectives. Yet, there are indeed solutions to the actors' lethargy and to the weak coverage of the initiatives undertaken. The solutions can be found in the methodical and civic mobilisation around more ambitious actions that are more adapted to receptive localities, though opened to modernity and perfectly anchored in the culture for positive results. Rosnert Ludovic Alissoutin holds a PhD in Law. Since 1995, he has been working as a consultant on development issues in Senegal and Africa, particularly local development issues. The particularity of his approach lies in the rejection of scientific exclusivism and recourse to a multi disciplinary, open and flexible analysis of the complexity of human development. It is this perspective that informed his doctoral thesis on La Gestion de l'eau en milieu aride, which discusses legal, anthropological, geographical, and sociological issues. For additional information on his profile and work, visit his website: http://www.ralissoutin.com
Les Amérindiens wayana et la mise en place du projet de Parc national guyanais
No full textThis article sums up the history of the project for a National Park in French Guiana and examines some of the most recent attempts to resolve the Amerindian territorial issue. Insofar as conservationist practice in Amazonia is founded on the premise that the Amerindians share the same heritage-preserving relationship to nature, the article reviews the animist foundations of these relationships. Furthermore Wayana society has already undergone major socioeconomic changes, which the author has attempted to relate to those likely to arise when the new national park is established.Cet article récapitule l'historique du projet de Parc national du sud de la Guyane et s'attarde sur quelques unes des tentatives les plus récentes pour résoudre la question territoriale amérindienne. Dans la mesure où la pratique conservationniste en Amazonie s'appuie sur le postulat que les Amérindiens partageraient avec elle un même rapport patrimonial à la nature, les fondements animistes de ces rapports sont réexaminés. La société wayana étant traversée par de nombreux bouleversements socio-économiques, certains d'entre eux sont ensuite reliés à ceux que l'on peut attendre de la mise en place future du parc.Leprêtre Ludovic. Les Amérindiens wayana et la mise en place du projet de Parc national guyanais. In: Journal d'agriculture traditionnelle et de botanique appliquée, 40ᵉ année, bulletin n°1-2,1998. Conserver, gérer la biodiversité : quelle stratégie pour la Guyane ? sous la direction de Marie Fleury et Odile Poncy. pp. 559-576
Data and Software of "Development of a Geometric Modeling Strategy for the Generation of Representative Unit Cells in 2D Braids"
No full text<h1><strong>Id: Data of following publication</strong></h1>
<p>title = "Development of a Geometric Modeling Strategy for the Generation of Representative Unit Cells in 2D Braids",<br>journal = "",<br>pages = "",<br>year = "",<br>issn = "",<br>doi = "",<br>author = "José Rothkegel, Benjamin Renson, Michael Bruyneel, Ludovic Noels"</p>
<p>Data doi on 10.5281/zenodo.10829042</p>
<h1>pyRVE</h1>
<h2><a href="#python-code-for-geometrical-generator-for-braided-composites-rve"></a><em>Python Code for Geometrical Generator for Braided Composites RVE</em></h2>
<p>pyRVE is a code written in <em>Python</em> using the <em>GMSH API</em> that generates the Representative Unit Cell (RUC) of braided composites. It allows the generation of the RUC of triaxial braided for <em>Diamond</em> and <em>Regular</em> patterns.</p>
<h2><a href="#requirements"></a>Requirements</h2>
<p>To run, it requires:</p>
<ul>
<li>The GMSH Python API, which must be built with OpenCascade support.
<ul>
<li>Choose a local installation directory; <code>CMAKE_INSTALL_PREFIX=HOME/local/gmsh</code>, and <code>GMSHPY_INSTALL_DIRECTORY=HOME/local/gmsh</code> e.g.;</li>
<li>Make that directory part of your <code>export PYTHONPATH=PYTHONPATH</code>.</li>
<li>After compiling use <code>make install</code>.</li>
</ul>
</li>
<li>The CM3 app dG3D if the final RVE homogenized solution is needed (<a href="https://gitlab.onelab.info/cm3/cm3Libraries">https://gitlab.onelab.info/cm3/cm3Libraries</a>).</li>
<li>Make sure that the latest version of OpenCascade (OCCT) is used. Current used version in occt-V7.8.0.</li>
</ul>
<h2><a href="#usage"></a>Usage</h2>
<h3><a href="#file-structure"></a>File Structure</h3>
<p>A typical run case must have a file structure, where:</p>
<ul>
<li><code>brd</code>: the files <code>.brd</code> and <code>.brep</code> are located here. The <code>.brd</code> is a backup of the <code>braidClass</code> instance used in the model saved using <code>pickle</code>, the <code>.brep</code> is the Boundary Representation file that can be opened with <em>GMSH</em>.</li>
<li><code>csv</code>: the <code>.csv</code> file saved here is the initial output of the code. It contains the actually used dimensions and the final cover factor of the braid.</li>
<li><code>data</code>: It contains <code>.csv</code> files with the material properties and the dimensions of the tows. The original model dimensions are read from here.</li>
<li><code>dir</code>: In the case of running the RVE homogenization, the directions of the tow fibers are stored here. They are saved for post processing.</li>
<li><code>msh</code>: the mesh file <code>.msh</code> obtained after the geometry geneartion is stores here.</li>
<li><code>png</code>: in the case of automatic post processing, png files are stored here.</li>
<li><code>res</code>: this folder is used to store the homogenization results. They have to be moved here.</li>
<li><code>stp</code>: if acitvated, a <code>.stp</code> file of the geometry is stored here</li>
<li><code>svg</code>: the projection of the geometry on the <em>x-y</em> plane is stored here.</li>
<li><code>vtk</code>: A copy of the mesh file without the matrix mesh is sotred here as a `.vtk`` file.</li>
</ul>
<h3><a href="#how-to-run"></a>How to Run</h3>
<p>We will consider the current file structure to run the example in 000_Base. To run the code, it can be called from the command prompt as</p>
<div>
<pre><code>python3 ../../source/mainRVE.py --name <i> --pattern <pattern></code></pre>
</div>
<p>In this case, the <code>--name</code> refers to the index that will be given to the model, where <code><i></code> must be changed to an integer and <code>--pattern</code> refers to the wanted pattern to be used, where <code><pattern></code> must be changed to either <code>dia</code> or <code>reg</code>.</p>
<blockquote>
<p>Note: <code><code>--name</code>cat</code> can also be used to reproduce the regular pattern benchmark of the paper. In that case, the volume fraction of fiber in the tows is hard coded as the provided value in the reference (i.e. 0.86). For other cases, the volume fraction is evaluated from the tow cross-sections.</p>
<p>Note: <code>mainRVE.py</code> must be accesible from the directory where the case is being run. This example shows the usage of the current file structure.</p>
</blockquote>
<h3><a href="#all-command-line-options"></a>All Command Line Options</h3>
<p>The code can be run using further options that serve different purpouses, some serving pre processing needs and other serving run administration. The different command line options are:</p>
<ul>
<li>Required:
<ul>
<li><code>--name</code> : it gives a suffix to the run model. It is usually an integer.</li>
<li><code>--pattern</code> : indicates the type of pattern to be used to build the geometry. The two current options are <code>dia</code> for diamond and <code>reg</code> for regular.</li>
</ul>
</li>
<li>Optional
<ul>
<li><code>-dG3D</code>: it indicates that the homogenization of the generated RUC is to be perfomed.</li>
<li><code>-GMSH</code> : it indicates that GMSH must be open upon competion of the generation of the mesh.</li>
<li><code>-loadModel</code> : it will try to load a premade model. It will ignore <code>--pattern</code>.</li>
<li><code>--rndPrm</code> : it will generate randomized geometrical parameters. It can be used to generate batches of results. It takes an argument that can be <code>2</code>, <code>4</code> or <code>6</code>. Currently, <code>2</code> gives a random value for <code>s_axial</code> and <code>theta</code>, <code>4</code> randomizes the same as <code>2</code> and adds <code>h_axial</code> and <code>h_bias</code>, and <code>6</code> randomizes the same as <code>4</code> and adds <code>w_axial</code> and <code>w_bias</code>.</li>
</ul>
</li>
<li>Pre-Processing
<ul>
<li><code>-refCF</code>: it tells the code to generate a grid of values for <code>s_axial</code> and <code>theta</code> where only the cover factor is obtained. It is meant for posterior graphing purposes.</li>
</ul>
</li>
</ul>
<h3><a href="#examples"></a>Examples</h3>
<p>Following the run options, a few examples are indicated</p>
<ul>
<li>A basic mesh generation run for the basic data, considering a <strong>regular pattern</strong>, for a model named <strong>2</strong>:</li>
</ul>
<div>
<pre><code>python3 ../../source/mainRVE.py --name 2 --pattern reg</code></pre>
</div>
<ul>
<li>The generation of the cover factor data and export, considering a <strong>regular pattern</strong>:</li>
</ul>
<div>
<pre><code>python3 ../../source/mainRVE.py --pattern reg -refCF</code></pre>
</div>
<ul>
<li>A run for the modified basic data, where the <strong>2</strong> parameters are modified <em>randomly</em>, considering a <strong>regular pattern</strong>, for a model named <strong>2</strong>:</li>
</ul>
<div>
<pre><code>python3 ../../source/mainRVE.py --name 2 --pattern reg --rndPrm 2</code></pre>
</div>
<ul>
<li>A run, where model <strong>2</strong> already exists in <code>brd</code> folder but not the <code>.msh</code> and <code>.vtk</code> files:</li>
</ul>
<div>
<pre><code>python3 ../../source/mainRVE.py --name 2 -loadModel </code></pre>
</div>
<h2><a href="#code-structure"></a>Code Structure</h2>
<p>The code is implemented into Python files, where <code>mainRVE.py</code> runs the whole code. The files are:</p>
<ul>
<li>Braid:
<ul>
<li><code>braidClass.py</code> :</li>
<li><code>bzrPairClass.py</code> :</li>
</ul>
</li>
<li>Geometry
<ul>
<li><code>bezrClass.py</code> :</li>
<li><code>bilnClass.py</code> :</li>
<li><code>patchClass.py</code> :</li>
<li><code>pntSetClass.py</code> :</li>
<li><code>pointClass.py</code> :</li>
<li><code>sctnClass.py</code> :</li>
<li><code>stripeClass.py</code> :</li>
<li><code>surfClass.py</code> :</li>
<li><code>surfOffClass.py</code> :</li>
</ul>
</li>
<li>Material:
<ul>
<li><code>chamis.py</code> :</li>
</ul>
</li>
<li>Tools:
<ul>
<li><code>dataIO.py</code> :</li>
<li><code>postDirection.py</code> :</li>
<li><code>tool.py</code> :</li>
<li><code>toolData.py</code> :</li>
</ul>
</li>
<li><code>curveClass.py</code> :*</li>
</ul>
<p> </p>
<p> </p>
Learning Dynamic Author Representations with Temporal Language Models
No full textInternational audienceLanguage models are at the heart of numerous works, notably in the text mining and information retrieval communities. These statistical models aim at extracting word distributions, from simple unigram models to recurrent approaches with latent variables that capture subtle dependencies in texts. However, those models are learned from word sequences only, and authors' identities, as well as publication dates, are seldom considered. We propose a neural model, based on recurrent language modeling, which aims at capturing language diffusion tendencies in author communities through time. By conditioning language models with author and temporal vector states, we are able to leverage the latent dependencies between the text contexts. This allows us to beat several temporal and non-temporal language baselines on two real-world corpora, and to learn meaningful author representations that vary through time
Data of "Ductile fracture of high entropy alloys: from the design of an experimental campaign to the development of a micromechanics-based modeling framework"
No full textData related to the publication (we would be grateful if you could cite the paper in the case in which you are using the data):
title = "Ductile fracture of high entropy alloys: from the design of an experimental campaign to the development of a micromechanics-based modeling framework",
journal = "Engineering Fracture Mechanics",
year = "2022",
volume = "275",
pages = "108844 ",
doi = "https://doi.org/10.1016/j.engfracmech.2022.108844",
author = "Antoine Hilhorst, Julien Leclerc, Thomas Pardoen, Pascal J. Jacques, Ludovic Noels, Van-Dung Nguyen"
New version following review.The research has been funded by the Walloon Region under the agreement no. 1610154-EntroTough in
the context of the 2016 WalInnov call
Experimental Parameter Identification of Nonlinear Mechanical Systems via Meta-heuristic Optimisation Methods
No full textMeta-heuristic optimisation algorithms are high-level procedures designed to discover near-optimal solutions to optimisation problems. These strategies can efficiently explore the design space of the problems; therefore, they perform well even when incomplete and scarce information is available. Such characteristics make them the ideal approach for solving nonlinear parameter identification problems from experimental data. Nonetheless, selecting the meta-heuristic optimisation algorithm remains a challenging task that can dramatically affect the required time, accuracy, and computational burden to solve such identification problems. To this end, we propose investigating how different meta-heuristic optimisation algorithms can influence the identification process of nonlinear parameters in mechanical systems. Two mature meta-heuristic optimisation methods, i.e. particle swarm optimisation (PSO) method and genetic algorithm (GA), are used to identify the nonlinear parameters of an experimental two-degrees-of-freedom system with cubic stiffness. These naturally inspired algorithms are based on the definition of an initial population: this advantageously increases the chances of identifying the global minimum of the optimisation problem as the design space is searched simultaneously in multiple locations. The results show that the PSO method drastically increases the accuracy and robustness of the solution, but it requires a quite expensive computational burden. On the contrary, the GA requires similar computational effort but does not provide accurate solutions.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Ship Design, Production and Operation
Begonia attenuata var. herbacea Brade 1944
No full text2. <i>Begonia attenuata</i> var. <i>herbacea</i> Brade (1944: 7) <i>nom. inval.</i> <p> Notes:— Brade (1944) published <i>Begonia attenuata</i> var. <i>herbacea</i> as a new variety with the annotation <i>inedit</i>. and without description. The use of <i>inedit.</i> by the author invalidates the name of the variety. Therefore <i>B. attenuata var. herbacea</i> is a invalid name (Art. 36.1 of ICN, Turland <i>et al</i>. 2018).</p>Published as part of <i>Kollmann, Ludovic Jean Charles, 2023, NOVELTIES IN BRAZILIAN BEGONIACEAE VI: Taxonomic notes, pp. 66-70 in Phytotaxa 587 (1)</i> on page 68, DOI: 10.11646/phytotaxa.587.1.9, <a href="http://zenodo.org/record/7710739">http://zenodo.org/record/7710739</a>
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