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See detailThe mata'a and the "collapse hypothesis"
Flas, Damien ULg

in De Dapper, Morgan; Cauwe, Nicolas; Huyghe, Dirk (Eds.) Easter Island. Collapse or Transformation ? A State of the Art. Proceedings of the International Conference of Bruxelles (November 9th-10th 2012) (in press)

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See detailThe mata’a: typology, technology and function
Flas, Damien ULg

Conference (2012)

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See detailMatadine, a cytotoxic alkaloid from Strychnos gossweileri
Quetin-Leclercq, Joëlle; Coucke, P.; Delaude, Clément et al

in Phytochemistry (1991), 30(5), 1697-1700

Matadine, a new alkaloid, has been isolated from the root bark of Strychnos gossweileri. Elucidation of its structure is mainly based on 1H and 1D NMR studies. Its cytotoxic activity has been tested on ... [more ▼]

Matadine, a new alkaloid, has been isolated from the root bark of Strychnos gossweileri. Elucidation of its structure is mainly based on 1H and 1D NMR studies. Its cytotoxic activity has been tested on cancer cells and normal cells. Matadine is an anhydronium base as serpentine, that exerts also a selective inhibiting activity on B16 melanoma cells while it is less toxic in human 2002 non-cancer cells. This selective activity might be well due , as it seems to be the case for serpentine and alstonine, to a higher affinity of matadine for destabilized single-stranded DNA as mainly present in cancer cells. [less ▲]

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See detailMatadine: a New Anhydronium Base from Strychnos gossweileri
Quetin-Leclercq, J.; Warin, R.; Delaude, C. et al

in Planta Medica (1990), 56

Matadine was isolated from the root bark of Strychnos gossweileri collected by one of us (C.D.) in Matadi (Congo).We describe here the isolation and structure detrmination of a new anhydronium base to ... [more ▼]

Matadine was isolated from the root bark of Strychnos gossweileri collected by one of us (C.D.) in Matadi (Congo).We describe here the isolation and structure detrmination of a new anhydronium base to which we have given the trivial name of matadine. [less ▲]

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See detailMatched unrelated donor stem cell transplant in 131 patients with follicular lymphoma : an analysis from the Lymphoma Working Party of the European Group for Blood and Marrow Transplantation
Avivi, Irit; Montoto, Silvia; Canals, Carme et al

in British Journal of Haematology (2009), 147

Matched unrelated donor stem cell transplantation (MUD-SCT) provides the only curative option for patients with follicular lymphoma (FL) who fail conventional therapies and do not have a siblong donor ... [more ▼]

Matched unrelated donor stem cell transplantation (MUD-SCT) provides the only curative option for patients with follicular lymphoma (FL) who fail conventional therapies and do not have a siblong donor. The purpose of this study was to analyse the outcome of patients with FL treated with MUD-SCT included in the European Group for Blood and Marrow Transplantation registry. 131 patients treated with reduced-intensity conditioning (RIC, n=87) or conventional myeloablative (CONV, n=44) MUD-SCT between 2000 and 2005 were included. Median time from diagnosis to MUD-SCT was 47 months and the median number of previous therapeutic regimens was 4 (previous autograft : 47%). RIC recipients were significantly older, with a longer interval from diagnosis to MUD-SCT and had failed a previous autograft more frequently than CONV recipients. Non-relapse mortality (NRM) was 24% and 30% at 100-d and 1-year, respectively. After a median follow-up of 36 months, 17% of the patients developed disease progression, the 3-year progression-freee survival (PFS) being 47%. Three-year overall survival (OS) for the whole series was 51%. On multivariate analysis, RIC regimens were associated with at lower NRM and a significantly longer PFS and OS. This retrospective study demonstrated that MUS-SCT results, even in heavily pre-treated populations, in a meaningful PFS and OS [less ▲]

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See detailMatching an oscillator model to a phase response curve
Sacré, Pierre ULg; Sepulchre, Rodolphe ULg

in Proceedings of the Joint 50th IEEE Conference on Decision and Control and European Control Conference (2011, December)

The Phase Response Curve (PRC) has proven a useful tool for the reduction of complex oscillator models. It is also an information often experimentally available to the biologist. This paper introduces a ... [more ▼]

The Phase Response Curve (PRC) has proven a useful tool for the reduction of complex oscillator models. It is also an information often experimentally available to the biologist. This paper introduces a numerical tool based on the sensitivity analysis of the PRC to adapt initial model parameters in order to match a particular PRC shape. We illustrate the approach on a simple biochemical model of circadian oscillator. [less ▲]

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See detailThe matching efficiency of regional labor markets. A stochastic production function estimation: France 1990-1995
Ibourk, Aomar; Maillard, Bénédicte; Perelman, Sergio ULg et al

in Empirica (2004), (31), 1-25

We evaluate the determinants of aggregate matching efficiency changes through a stochastic translog production frontier model. The efficiency coefficient is represented by a stochastic function of ... [more ▼]

We evaluate the determinants of aggregate matching efficiency changes through a stochastic translog production frontier model. The efficiency coefficient is represented by a stochastic function of variables meant to capture workers and firms characteristics. The model is estimated on French data covering twenty-two regions from March 1990 till February 1995. Our estimates suggest that aggregate matching efficiency has decreased steadily in the early nineties. There are also wide cross-regional differences. On average, about 30% of the variations of efficiency observed across time and regions can be related to changes in the explanatory variables used in the model. The most important explanatory variables are the proportion of youngsters, females and immigrants in the stock of job seekers. Long-term unemployment has a significant negative effect, population density a significant positive one. The huge decline in the proportion of permanent job offers has apparently little effect on matching efficiency. [less ▲]

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See detailMatching Grants and Unconditional Grants: The Case with n Goods
Jurion, Bernard ULg

in Public Finance = Finances Publiques (1979)

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See detailLe matérel archéologique des couches médiévales
Hoffsummer, Patrick ULg; Tilkin-Peters, Catherine

in Otte, Marcel (Ed.) Les fouilles de la place Saint-Lambert à Liège, 2: le Vieux-Marché (1988)

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See detailMaterial Aspects of Bone Tissue Engineering
Ozhukil Kollath, Vinayaraj ULg; Cloots, Rudi ULg

Diverse speeche and writing (2012)

Bone tissue engineering is a highly studied topic in material science in the recent decades. Basic principles of chemistry and biology along with advanced material science techniques should be used in ... [more ▼]

Bone tissue engineering is a highly studied topic in material science in the recent decades. Basic principles of chemistry and biology along with advanced material science techniques should be used in order to elucidate the parameters which may influence the bone tissue growth on artificial implants. Progress has been made to an advanced level but still there is room for improvements. Especially in case of large bone defects, finding a ‘universal’ replacement implant is difficult. Patient specific data have to be taken in to account to get a good osteointegration. Metal and ceramic implants are commonly tested in case of large bone defects, but a good mimic of natural bone is hard due to various reasons. However fine tuning these materials and combination of these materials are finding good results. Addition of polymer materials in such implants is a recent effective attempt. Different combinations of these materials along with functionalisation using bioactive molecules make the bone tissue engineering nearly perfect. This presentation will discuss about the recent trends in the materials used in bone tissue engineering. [less ▲]

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See detailMaterial behavior of the hexagonal alpha phase of a titanium alloy identified from nanoindentation tests
Gerday, Anne-Françoise ULg; Ben Bettaieb, Mohamed ULg; Duchene, Laurent ULg et al

in European Journal of Mechanics A : Solids (2011), 30

This article focuses on the numerical modeling of nanoindentation tests performed on the hexagonal a phase of Ti-5553 alloy in order to identify its mechanical behavior. The main goal consists in ... [more ▼]

This article focuses on the numerical modeling of nanoindentation tests performed on the hexagonal a phase of Ti-5553 alloy in order to identify its mechanical behavior. The main goal consists in determining the relative strength of the slip modes in the a phase of Ti-5553. This work was performed using an elastoviscoplastic crystal plasticity-based constitutive law. The difficulties in determining the slip systems that can be activated and their corresponding critical resolved shear stresses (CRSS) are discussed. Numerical predictions are compared to experimental nanoindentation curves. [less ▲]

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See detailMaterial data identification to model the single point incremental forming process
Bouffioux, Chantal ULg; Pouteau, P.; Duchene, Laurent ULg et al

in International Journal of Material Forming (2010), 3(Suppl. 1), 979-982

In this study, the Single Point Incremental Forming process (SPIF) is applied on a specific aluminium alloy used in the aerospace industry since this technique and material combine a low specific weight ... [more ▼]

In this study, the Single Point Incremental Forming process (SPIF) is applied on a specific aluminium alloy used in the aerospace industry since this technique and material combine a low specific weight, high strength and stiffness properties and high strain levels. To be able to optimize the process, a model and its material parameters are required. It was noticed that a simple isotropic hardening model was not sufficient to provide an accurate tool force prediction [1]. Therefore an elasto-plastic law with a mixed isotropic-kinematic hardening is investigated. The inverse method coupled with the Finite Element (FE) code: "Lagamine" [2] is used to fit the material data of this complex law. In order to validate the model and the material data, a Line test and a Cone test are used. [less ▲]

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See detailMaterial Identification Using a Bi-Axial Test Machine
Flores, Paulo; Moureaux, Pierre; Habraken, Anne ULg

in Proceedings of the International Conference on Advances in Experimental Mechanics (2005)

This paper shows the identification of material parameters for a DC06 IF steel sheet of 0.8 mm by mechanical tests. The experimental equipment used consists of a tensile test machine, a bi-axial test ... [more ▼]

This paper shows the identification of material parameters for a DC06 IF steel sheet of 0.8 mm by mechanical tests. The experimental equipment used consists of a tensile test machine, a bi-axial test machine able to perform plane-strain and simple shear tests separately or simultaneously and an optical strain gauge. Tensile, plane-strain and simple shear tests were performed at 0°, 45° and 90° from the sheet rolling direction in order to identify Hill 1948 and Hosford 1979 yield criteria. Two identification methods are used: one based on strain measurements (anistropy coefficients) and the other one based on stress measurements (plastic contours). The results confirm that mechanical tests applying other stress-states than tensile are required to obtain accurate material parameters identification. [less ▲]

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See detailMaterial Parameter characterization for the Gurson model
Guzmán Inostroza, Carlos Felipe ULg

Diverse speeche and writing (2013)

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See detailMaterial parameter identification of Cazacu's model for Ti6Al4V using the simulated annealing algorithm
Gilles, Gaëtan ULg; Habraken, Anne ULg; Duchene, Laurent ULg

in Materials Science Forum (2010), 636-637

Phenomenological yield criteria are generally described by many material parameters. A technique to identify these parameters is required to find the best fit to the results of the mechanical tests. The ... [more ▼]

Phenomenological yield criteria are generally described by many material parameters. A technique to identify these parameters is required to find the best fit to the results of the mechanical tests. The parameter identification by the classical simulated annealing technique is presented in this paper. This algorithm, based on Metropolis’ works [1,2], is a global optimization method that distinguishes between different local optima to reach the global optimum. The anisotropic model used in this study is the one proposed by [3]. To prove the efficiency of the proposed algorithm, the material parameters of Ti6Al4V titanium alloy are identified and compared with those obtained using different identification procedures and the same experimental data. [less ▲]

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See detailLe matérialisme biologique de Lévi-Strauss
Steinmetz, Rudy ULg

in Revue Philosophique de la France et de l'Etranger (1984)

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See detailLe matérialisme de Brentano
Boccaccini, Federico ULg

Conference (2012)

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See detailLe matérialisme est-il mort ? petite critique de l'idéalisme critique
Frère, Bruno ULg

in Frère, Bruno (Ed.) Le tournant de la théorie critique (2014)

This article is concerned with the lack of effectiveness of contemporary critical theories in explaining the conditions for social change. These theories, I would argue, continue to rely on a narrow ... [more ▼]

This article is concerned with the lack of effectiveness of contemporary critical theories in explaining the conditions for social change. These theories, I would argue, continue to rely on a narrow construction of social actors. Indeed from Lukács to Bourdieu or even Habermas, many significant intellectual developments have taken place which continue to be based on one key assumption: that individuals (workers, social actors, etc.) unconsciously reproduce the social structures of capitalism whilst being alienated by them. They accept the conditions enforced on them and no longer seek to rebel against a system which impoverishes not only their work and culture, but also their soul and their creativity. What is more: they ensure the reproduction of the system by seeking to engage in mass consumption at any cost, or by glorifying the dominant values. In this paper I would like to show that today, no new critical perspective has emerged out of this negative representation of the world. Indeed, critical works present ‘man’ living here and now as nothing more than a deeply bastardized being, corrupted, denatured, soiled by a civilizing process. What we have is in effect a social actor who, in Rousseau’s philosophical tradition, has been perverted by a civilizing process informed by modernity or capitalism. This view of social actors rests on a form of disgust towards the world. [less ▲]

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See detailMatérialisme et évènement. Le solidarisme (et les droits de l'homme) au prisme d'une critique marxiste libertaire
Frère, Bruno ULg

in D'Hombres, Emmanuel (Ed.) Le solidarisme de Bourgeois (titre provisoire) (2015)

by focusing on the concept of world propsed by Boltanski and his pragmatic perspective which in previous work has enabled me to cast a critical eye on new social resistance movements. For Boltanski, what ... [more ▼]

by focusing on the concept of world propsed by Boltanski and his pragmatic perspective which in previous work has enabled me to cast a critical eye on new social resistance movements. For Boltanski, what matters is the potential for emancipation to be found in the everyday practices of social actors, directly engaged in the world. He assigns to the sociologist the role of discerning what practices have emancipatory potential because they resist dominant discourses, alter institutional, legitimate accounts of reality which can perhaps lead to social change. There is however a temptation in Boltanski’s work to return to an idealist perspective which shoehorns the emancipatory potential of the everyday practices of social actors into a conceptual and thus intellectual framework: le registre métacritique (ou métapragmatique) auquel seul le sociologue peut avoir accès. Ce registre est unable to give us new perspectives on what might concretely constitute emancipation. In other words, the danger is that even Boltanski’s work will not achieve critical renewal. En lieu et place d’une subjectivité ideale et transcendentale, Boltanski suggère de favoriser un point de vue transcendant sur les pratiques sociales, seul capable de véritablement comprendre la réalité et la façon dont elle nous aliène. Mais ce point de vue est tout aussi idéaliste. Bourdieu ou les théoriciens de Francfort, dans la tradition de l’idéalisme transcendantal kantienne, recherchent le sujet pur qui se cachent sous la conscience pratique des personnes. Boltanski identifie pour sa part un point de vue métapragmatique susceptible de juger les évènements auxquels sont confrontées les personnes de façon plus lucide et plus exhaustive que ces dernières, confinées à un simple point de vue pragmatique imédiat et sans recul. Ce faisant, il se contente de placer le jugement “vrai” au dessus de la conscience des personnes (posture transcendante) plutôt qu’en dessous (posture trenscendantale). Mais dans les deux cas ce jugement vrai apparaît comme une perfection extérieur inaccessible aux personnes en question, ici et maintenant. Therefore I will propose a way out of this impasse by refusing to evaluate emancipation against the test of a (re)turn to an ideal state (whether transcendental or transcendent), but instead embedded in the lived material existence of social actors. Because we cannot be certain where these actions will lead, as sociologists we must accept uncertainty and contingency comme nous l’enseigne Bruno Latour, cet autre auteur français qui se réclame également aujourd’hui du pragmatisme. Mais parce que ce dernier rejette complétement la possibilité de developper encore aujourd’hui une pensée critique, il rend impossible toute reflexion en terme d’émancipation. Or scruter l’emancipation potentielle que recellent ces pratiques est nécessaire si l’on veut évaluer which, amongst them, have the potential to yield social transformation. In sum, in what follows [less ▲]

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See detailMatérialisme et histoire dans la linguistique du président de Brosses
Droixhe, Daniel ULg

in Geckeler, H.; Schlieben-Lange, B.; Trabant, J. (Eds.) et al Logos semantikos. Studia linguistica in honorem E. Coseriu (1921-1981) (1981)

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