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See detailOrganic Rankine Cycles including fluid selection
Lemort, Vincent ULg; Declaye, Sébastien ULg; Quoilin, Sylvain ULg

in Handbook of Clean Energy Systems (in press)

An Organic Rankine Cycle (ORC) is similar to a steam Rankine cycle, except that the working fluid is not water but an organic compound, such as a refrigerant or a hydrocarbon, characterized by a lower ... [more ▼]

An Organic Rankine Cycle (ORC) is similar to a steam Rankine cycle, except that the working fluid is not water but an organic compound, such as a refrigerant or a hydrocarbon, characterized by a lower ebullition temperature than that of water. Hence lower temperature heat sources can be exploited such as solar energy, geothermal energy and waste heat recovery from many different processes. During the design phase of an ORC system, the selection of the working fluid must be conducted in parallel with the selection and the sizing of the components (mainly the expansion machine, the pump and the heat exchangers) and with the definition of the cycle architecture. This approach allows taking into consideration all technical constraints. Relevant properties of working fluids that should be considered during their selection are listed. Major characteristics of available displacement and turbo-expander technologies are described. The impact of the pump performance on the overall performance is discussed and strategies to increase the available NPSH are proposed. Finally, improved cycle architectures are introduced. Major applications of ORC systems are described: geothermal power plants, biomass CHP plants, waste heat recovery in industry, waste heat recovery on internal combustion engines and solar power plants. All these applications differ by the nature of the heat source and heat sink, the integration of the ORC with these sources and sinks, and the range of installed capacities. These differences yield specific designs, which are described. Performance achieved by systems in operation or prototypes are presented. [less ▲]

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See detailThe persea tree from Alexander to Late Antiquity: A contribution to the cultural and social history of Greco-Roman Egypt
Caneva, Stefano ULg

in Ancient Society (in press), 45

Although a great number of studies has already been devoted to the topic of sacred trees in Greco-Roman Egypt, this paper aims at offering a new contribution to this debate by shifting the focus of ... [more ▼]

Although a great number of studies has already been devoted to the topic of sacred trees in Greco-Roman Egypt, this paper aims at offering a new contribution to this debate by shifting the focus of research from the hitherto dominant interest in ancient and modern botanical classifications to the study of the socio-cultural contexts (and their diachronic changes) in which sacred trees were used in Hellenistic and Roman Egypt. The analysis focuses on the case study of the tree called περσ(ε)ία / persea in Greek and Latin sources. After drawing attention to the non-complete overlap between the denomination adopted by Greek and Latin authors for this Egyptian sacred plant and its “emic” Hieroglyphic / Demotic correspondents, ἰšd and šw3b, the focus will be on patterns of continuity, innovation and re-contextualization of Egyptian religious traditions in Ptolemaic and Roman Egypt and on the social actors and contexts that were involved in the use and protection of sacred plants. When approached from this perspective, the evidence on persea provides a fruitful dossier to investigate some aspects of the dialectic between continuity and transformation in cultural traditions, with particular regard to cases where traditions were adapted beyond cultural and ethnic limits. Moreover, the persea dossier enables us to discuss ancient contexts in which, for religious reasons, nature was seen as worth of being protected and preserved against the risk of extinction. This will allow us to raise some preliminary questions concerning the limits of applicability of modern environmental thinking to ancient cultures, in contexts in which the preservation of vegetal species was seen as an important value for the identity of a community, thus requiring individual and institutional commitment. [less ▲]

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See detailEtude de la séquence stratigraphique des loess de la carrière de Romont (Eben-Emael, Belgique) par une campagne géotechnique
Delvoie, Simon ULg; Pirson, Stéphane ULg; Charlier, Robert ULg et al

in Notae Praehistoricae (in press), 36

The Romont quarry is recently considered as a new type section for the Middle Belgium loess deposits. The site displays a nearly 10 m thick loess sequence mainly dating from the Upper Pleistocene. The ... [more ▼]

The Romont quarry is recently considered as a new type section for the Middle Belgium loess deposits. The site displays a nearly 10 m thick loess sequence mainly dating from the Upper Pleistocene. The Rocourt Pedocomplex, the Humiferous Complex of Remicourt, the Malplaquet Soil and the Nagelbeek Tongued Horizon are especially well developed. Classical approaches to study the loess sequence need observable sections. Unfortunately these sections are rare in Middle Belgium, often temporary and not deep enough. To identify reference horizons, archaeologists and geologists use to resort to hand auger sampling techniques. Investigation of loess by cone penetration tests could offer an alternative to the lack of outcrops and could be used complementary to hand drilling techniques. This study focuses on a methodology to approach as a first step the loess sequence to identify the presence or not of some layers and their extension. The investigation campaign performed on the site of Romont aims to define reference horizons based on mechanical properties by comparison with an observable outcrop. Then 16 cone penetration tests have been realized behind the working face. The campaign results reveal the existence of some horizons into the loess sequence. The transition between the Humiferous Complex of Remicourt and the Rocourt Pedocomplex is the most noticeable horizon. These two pedostratigraphic units are important due to the presence of archaeological materials in Middle Belgium and borderlands. Closer to the surface the Nagelbeek Tongued Horizon and the decarbonation limit are also highlighted from results of the geotechnical campaign. [less ▲]

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See detailThere is nothing more pratical than a good theory. Conceptuals tools for the Practioners in Conservation
Verbeeck, Muriel ULg

in Studies in Conservation (in press)

This paper sheds light on the efficiency of philosophical conceptualization to grasp the modalities of contemporary art. The concepts of intentionality, attentionality and aesthetic functionality borrowed ... [more ▼]

This paper sheds light on the efficiency of philosophical conceptualization to grasp the modalities of contemporary art. The concepts of intentionality, attentionality and aesthetic functionality borrowed from Gerard Genette are used to analyze a practical case: Dirty Corner, installation by Anish Kapoor vandalized in the gardens of Versailles. [less ▲]

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See detailManagement of relapsed multiple myeloma: Recommendations of the international myeloma working group
Laubach, J.; Garderet, L.; Mahindra, A. et al

in Leukemia : Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K (in press)

The prognosis for patients multiple myeloma (MM) has improved substantially over the past decade with the development of new, more effective chemotherapeutic agents and regimens that possess a high level ... [more ▼]

The prognosis for patients multiple myeloma (MM) has improved substantially over the past decade with the development of new, more effective chemotherapeutic agents and regimens that possess a high level of anti-tumor activity. In spite of this important progress, however, nearly all MM patients ultimately relapse, even those who experience a complete response to initial therapy. Management of relapsed MM thus represents a vital aspect of the overall care for patients with MM and a critical area of ongoing scientific and clinical research. This comprehensive manuscript from the International Myeloma Working Group provides detailed recommendations on management of relapsed disease, with sections dedicated to diagnostic evaluation, determinants of therapy, and general approach to patients with specific disease characteristics. In addition, the manuscript provides a summary of evidence from clinical trials that have significantly impacted the field, including those evaluating conventional dose therapies, as well as both autologous and allogeneic stem cell transplantation. Specific recommendations are offered for management of first and second relapse, relapsed and refractory disease, and both autologous and allogeneic transplant. Finally, perspective is provided regarding new agents and promising directions in management of relapsed MM. [less ▲]

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See detailCutaneous involvement in multiple myeloma: a multi-institutional retrospective study of 53 patients
Jurczyszyn, .; Olszewska-Szopa, M.; Hungria, V. et al

in Leukemia & Lymphoma (in press)

Skin infiltration in multiple myeloma (skin MM) is a rare clinical problem. Only a few cases of skin involvement have been reported, primarily in single case reports. We analyzed and present the clinical ... [more ▼]

Skin infiltration in multiple myeloma (skin MM) is a rare clinical problem. Only a few cases of skin involvement have been reported, primarily in single case reports. We analyzed and present the clinical outcomes, immunohistochemistry and cytogenetic features, and relevant laboratory data on 53 biopsy-proven skin MM cases. The median time from MM diagnosis to skin involvement was 2 years. There appears to be an overrepresentation of immunoglobulin class A (IgA) and light chain disease in skin MM. We found no correlation between CD56 negative MM and skin infiltration. We found that skin MM patients presented in all MM stages (i.e. ISS stages I to III), and there was no preferential cytogenetic abnormality. Patients with skin MM carry a very poor prognosis with a median overall survival (OS) of 8.5 months as time from skin involvement. Moreover, patients with IgA disease and plasmablastic morphology appear to have a worse OS. [less ▲]

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See detailNi utopie ni solidarisme. Une refonte matérialiste et critique de l'association est-elle possible ?
Frère, Bruno ULg

in Delaunay, Catarina (Ed.) Democracia, promessas, utopias e (des)ilusoes : dilemas e disputas nas arenas publicas (2017)

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See detailHow to account for new forms of resistance to domination: An argument for a materialist renewal in European social theory
Frère, Bruno ULg; Tulle, Emmanuelle

E-print/Working paper (2017)

Many significant intellectual developments have taken place in 20th century European social theories. Notably the first Frankfurt School and Bourdieu’s work have successfully shown how workers, social ... [more ▼]

Many significant intellectual developments have taken place in 20th century European social theories. Notably the first Frankfurt School and Bourdieu’s work have successfully shown how workers, social actors, etc. are alienated or dominated by capitalist social structures. But according to Habermas, neither perspective successfully allows for the possibility that people could contribute to their own emancipation. The emergence of new forms of social resistance to domination such as those embodied by the Indignados, Anonymous, Femen, the practitioners of alternative economy, movements of unemployed people or illegals compels us to envisage the possibility for emancipation, but how? In this paper we explore opportunities for accounting for this by considering the work of a range of other European social theorists, more specifically Boltanski whose critical intent is embodied in his pragmatic sociology, and evident in his coining and use of the concept of the world. In addition we will consider Latour’s own pragmatic stance as we believe that despite his disinterest in new social movements, his work, informed by pure immanence, might offer potential solutions. But we would argue that even in these innovations there is either a persistent tendency to imagine emancipation primarily as a return to some ideal state or a lack of critical engagement with alienation. In response, we propose a materialist renewal, which will lead us to ponder on the political role of sociologists. [less ▲]

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See detailBack to materialism Reflections on Marx’s labour, praxis, cooperative and libertarian socialism in the 19th century
Frère, Bruno ULg

E-print/Working paper (2017)

From Marx to Althusser, the materialist approach has tended to assume that individuals (that is, workers, proletarians and other social actors), unconsciously reproduce the social structures of capitalism ... [more ▼]

From Marx to Althusser, the materialist approach has tended to assume that individuals (that is, workers, proletarians and other social actors), unconsciously reproduce the social structures of capitalism which alienate them. It is assumed that individuals accept the conditions forced upon them and no longer seek to rebel against a world which substantially impoverishes their labour, their spirit and their creativity. In this paper, I will try to show that by dint of favouring almost exclusively Marx's concept of alienation, there is a considerable risk that materialist thought will adopt only a negative path. Whilst I acknowledge Marx’s significance to materialism, I wish to argue that his stance should be combined with that of the anarchist and libertarian French thinker Proudhon. Proudhon has succeeded in presenting a conception of the worker as more than just alienated. Workers can also cooperate and experience a reciprocity seemingly at odds with the character of capitalism. Under Proudhon’s influence materialism takes a positive turn, enabling us to avoid falling into the utopianism that the theory of social economy employs to critique capitalism – a utopianism that renders its critique even less effective than that of Marx. [less ▲]

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See detailPost-scriptum à La Misère du monde 25 ans après : Bourdieu, le peuple et son suicide
Cormann, Grégory ULg

in Provenzano, François; Goin, Emilie (Eds.) Usages du peuple (2017)

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See detailExplain Your Thesis in Three Minutes
Kreusch, Marie ULg

Article for general public (2016)

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See detailRapport sur l'Habilitation de Catherine GUYON : Par la roue de sainte Catherine. Dévots, pèlerins et pèlerinage à sainte Catherine d’Alexandrie (VIIIe- début du XVIe siècle)
George, Philippe ULg

Report (2016)

Madame Guyon a étudié le culte de sainte Catherine d'Alexandrie et son développement tous azimuts.

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See detailThe Base of Fabia Fabiana from Acci (Guadix, Granada). A Reassessment
Veymiers, Richard ULg; Gasparini, Valentino

Conference (2016, November)

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See detailSU(3) Clebsch-Gordan coefficients at large $N_c$
Stancu, Floarea ULg

in Nuclear Physics A (2016), 945

It is argued that several papers where SU(3) Clebsch-Gordan coefficients were calculated in order to describe properties of hadronic systems are, up to a phase convention, particular cases of analytic ... [more ▼]

It is argued that several papers where SU(3) Clebsch-Gordan coefficients were calculated in order to describe properties of hadronic systems are, up to a phase convention, particular cases of analytic formulae derived by Hecht in 1965 in the context of nuclear physics. This is valid for irreducible representations with multiplicity one in the corresponding Clebsch-Gordan series. For multiplicity two, Hecht has proposed an alternative which can provide correct $1/N_c$ sub-leading orders in large $N_c$ studies. [less ▲]

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See detailThe Middle Ages: A New Age for the Reception of the Gods of Egypt
Veymiers, Richard ULg

Conference (2016, October 20)

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See detailConclusion
Veymiers, Richard ULg

Conference (2016, September)

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See detailVoyage[s] à travers le thymus
Geenen, Vincent ULg

Book published by Presses Universitaires de Liège (2016)

Cet ouvrage concis s'intéresse au thymus, un organe dont la fonction a échappé si longtemps au monde de la science que d'aucuns le considèrent encore aujourd'hui comme un vestige de l'évolution. Vous le ... [more ▼]

Cet ouvrage concis s'intéresse au thymus, un organe dont la fonction a échappé si longtemps au monde de la science que d'aucuns le considèrent encore aujourd'hui comme un vestige de l'évolution. Vous le connaissez néanmoins très bien car vous avez certainement consommé de très savoureux 'ris de veau' qui sont la dénomination culinaire du thymus de cet animal. Ce n'est qu'au cours des 60 dernières années environ que cet organe a livré un à un ses secrets les plus intimes jusqu'à occuper la place essentielle de 'petit cerveau' de notre système de défenses immunitaires. Cet essai concerne donc aussi l’immunologie, la science qui étudie les mécanismes de notre système de défenses, contre les agressions infectieuses surtout, en un mot l’immunité. Dès la fondation de cette nouvelle science à la fin du XIXe siècle, les immunologistes ont été confrontés à cet important paradoxe: comment notre système immunitaire, capable de réagir contre une multitude d’agents étrangers (ce qui est désigné comme le ‘non-soi’), est-il heureusement incapable en conditions normales d’agresser l’organisme qui l’héberge (le ‘soi’) ? Cette impossibilité du système immunitaire de réagir contre le ‘soi’ s’appelle la ‘tolérance immunitaire’ et elle est devenue aujourd’hui la pierre angulaire du fonctionnement normal de ce système. La rupture de cette tolérance est à l’origine des maladies dites ‘auto-immunes’. Il en existe environ 70 dont les plus connues sont le diabète juvénile insulino-dépendant (diabète de type 1) qui frappe les enfants et les jeunes adolescents, la plupart des affections de la glande thyroïde, la sclérose en plaques, le psoriasis et la polyarthrite rhumatoïde. J’ai souhaité inviter le lecteur à pénétrer dans un monde qui était encore presque inconnu il y a moins de soixante ans, celui du thymus qui peut être qualifié aujourd’hui sinon de ‘cerveau’, au moins de programmeur central de la tolérance immunitaire. Les travaux menés par mon groupe à l’Université de Liège ont établi que le thymus constitue un carrefour crucial entre les trois grands systèmes de communication intercellulaire des espèces vivantes, les systèmes nerveux, endocrine et immunitaire. Ils ont démontré que le thymus joue un rôle unique dans la programmation de la tolérance immunitaire vis-à-vis des systèmes nerveux et endocrine. Ces études ont aussi établi qu’un dysfonctionnement du thymus joue un rôle moteur dans le développement des maladies auto-immunes spécifiques des glandes endocrines. En un mot, c’est d’abord le thymus qui est malade et non les organes touchés par le processus auto-immun pathogène qui résulte de cette pathologie du thymus. Mon plus vif espoir aujourd’hui est que la découverte de ce nouveau concept se traduise un jour par l’invention d’un nouveau type de vaccination contre le diabète des enfants et des adolescents. Quelles sont les raisons qui ont motivé ma candidature au Prix littéraire Prince Alexandre de Belgique 2014. 1° La première était de témoigner ma reconnaissance à l’égard de la Fondation cardiologique Princesse Lilian qui a joué un rôle déterminant dans l’orientation de ma carrière de médecin-chercheur. En effet, cette Fondation a organisé en 1984 à Bruxelles un symposium international consacré au contrôle exercé par le système nerveux sur le système immunitaire. Mon promoteur, le regretté Pr Paul Franchimont, avait assisté à ce symposium et me conseilla vivement d’essayer de développer des activités de recherches dans ce tout nouveau domaine. C’est dans ce même esprit de reconnaissance à la Fondation Princesse Lilian que j’ai proposé que la chaire internationale du même nom soit confiée en 2015 à mon confrère allemand, lui aussi spécialiste du thymus, le Pr Bruno Kyewski de l’Institut allemand de la recherche contre le cancer à Heidelberg en Allemagne. Cette proposition a été acceptée et la leçon inaugurale de cette chaire a eu lieu le 16 mars 2015 en la Grande Salle Académique de l’Université de Liège. 2° Mon goût pour la littérature, qu’elle soit romancière, historique, scientifique ou philosophique, constitue incontestablement la deuxième raison de ma candidature au Prix Prince Alexandre. Combien de fois n’ai-je lu une œuvre littéraire en m’interrogeant si je serais capable moi-même d’écrire un jour un livre ? C’est aussi en me plongeant dans la littérature que j’ai vécu les plus beaux voyages initiatiques de la pensée. 3° Une autre raison essentielle qui m’a poussé à rédiger mes « Voyage(s) à travers le thymus » est la suivante. L’équipe de recherche que j’anime au Centre d’Immunologie du GIGA de Liège a contribué à mettre au jour un phénomène essentiel de la vie qui est apparu avec le premier thymus il y a environ 450 millions d’années chez les poissons cartilagineux comme la raie ou le requin. Cette ‘découverte’ d’un secret inouï de la vie suscite alors en vous une sensation d’émerveillement du même ordre que l’émotion qui vous étreint quand vous écoutez l’Oratorio de Noël ou la Passion selon Saint-Mathieu de Jean-Sébastien Bach, quand vous regardez un tableau de Piero de la Francesca, ou quand vous contemplez une merveille de la Nature comme le Grand Canyon du Colorado ou le lever du soleil sur Massif du Hoggar depuis l’ermitage du Père de Foucault à l’Assekrem. Vous pouvez très bien vivre seul un pareil émerveillement mais le premier désir que vous ressentez au fond de vous-même est de le partager avec vos proches. Ce désir irrésistible a joué lui aussi un rôle déterminant dans ma décision de consacrer la majeure partie de mes soirées de l'été 2014 à écrire ce texte et, surtout, à le rédiger de manière compréhensible pour toutes et tous. Et c’est là que réside la plus grande difficulté car, comme le disait Albert Einstein, « Si vous ne pouvez expliquer un concept à un enfant de six ans, c'est que vous ne le comprenez pas complètement ». 4° Enfin, les trente-cinq années de ma vie de médecin engagé dans la recherche ont exercé un impact considérable sur ma propre conception de la vie et de ses innombrables mystères. Mon essai se clôture par un témoignage personnel décrivant comment ces différents voyages ont nourri ma réflexion à propos des rapports entre la science et la foi. J’ai tenté d’expliquer qu’il était encore possible aujourd’hui de rester chrétien en devenant un scientifique quelque peu écouté, comment mes vies professionnelle et spirituelle pouvaient se nourrir l’une de l’autre tout en respectant leur indépendance. [less ▲]

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