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See detailQuadratic reformulations of nonlinear binary optimization problems
Anthony, Martin; Boros, Endre; Crama, Yves ULg et al

in Mathematical Programming (2017), 162

Very large nonlinear unconstrained binary optimization problems arise in a broad array of applications. Several exact or heuristic techniques have proved quite successful for solving many of these ... [more ▼]

Very large nonlinear unconstrained binary optimization problems arise in a broad array of applications. Several exact or heuristic techniques have proved quite successful for solving many of these problems when the objective function is a quadratic polynomial. However, no similarly efficient methods are available for the higher degree case. Since high degree objectives are becoming increasingly important in certain application areas, such as computer vision, various techniques have been recently developed to reduce the general case to the quadratic one, at the cost of increasing the number of variables. In this paper we initiate a systematic study of these quadratization approaches. We provide tight lower and upper bounds on the number of auxiliary variables needed in the worst-case for general objective functions, for bounded-degree functions, and for a restricted class of quadratizations. Our upper bounds are constructive, thus yielding new quadratization procedures. Finally, we completely characterize all ``minimal'' quadratizations of negative monomials. [less ▲]

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See detailConserved Fever Pathways across Vertebrates: A Herpesvirus Expressed Decoy TNF-alpha Receptor Delays Behavioral Fever in Fish.
Rakus, Krzysztof; Ronsmans, Maygane; Forlenza, Maria et al

in Cell Host & Microbe (2017), 21(2), 244-253

Both endotherms and ectotherms (e.g., fish) increase their body temperature to limit pathogen infection. Ectotherms do so by moving to warmer places, hence the term "behavioral fever." We studied the ... [more ▼]

Both endotherms and ectotherms (e.g., fish) increase their body temperature to limit pathogen infection. Ectotherms do so by moving to warmer places, hence the term "behavioral fever." We studied the manifestation of behavioral fever in the common carp infected by cyprinid herpesvirus 3, a native carp pathogen. Carp maintained at 24 degrees C died from the infection, whereas those housed in multi-chamber tanks encompassing a 24 degrees C-32 degrees C gradient migrated transiently to the warmest compartment and survived as a consequence. Behavioral fever manifested only at advanced stages of infection. Consistent with this, expression of CyHV-3 ORF12, encoding a soluble decoy receptor for TNF-alpha, delayed the manifestation of behavioral fever and promoted CyHV-3 replication in the context of a temperature gradient. Injection of anti-TNF-alpha neutralizing antibodies suppressed behavioral fever, and decreased fish survival in response to infection. This study provides a unique example of how viruses have evolved to alter host behavior to increase fitness. [less ▲]

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See detailEvaluation of the long-term effect of biochar on properties of temperate agricultural soil at pre-industrial charcoal kiln sites in Wallonia, Belgium
Hardy, Brieuc; Cornelis, Jean-Thomas ULg; Houben, David et al

in European Journal of Soil Science (2017), 68

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See detailLa « discrimination à rebours » au sein du marché intérieur : une illégalité qu’il ne faut pas voir au niveau européen ?
Van Cleynenbreugel, Pieter ULg

in Revue de la Faculté de Droit de l'Université de Liège (2017)

Cet article dresse un panorama de la jurisprudence sur les situations purement internes au droit du marché intérieur et du phénomène juridique de la discrimination à rebours. Il est conclu qu'une telle ... [more ▼]

Cet article dresse un panorama de la jurisprudence sur les situations purement internes au droit du marché intérieur et du phénomène juridique de la discrimination à rebours. Il est conclu qu'une telle discrimination est inhérente au régime juridique de l'Union européenne caractérisé par le principe d'attribution des compétences. Il convient aux Etats membres d'y apporter des solutions fondées sur leurs droits constitutionnels respectifs. [less ▲]

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See detailPest and mould infestation of smoked shrimp and preventive measures for storage in cottage industry
Kpoclou; Anihouvi; Azokpota et al

in Indian Journal of Traditional Knowledge (2017), 16

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See detailCOMPUTATIONAL METHODS IN MANUFACTURING
Ponthot, Jean-Philippe ULg; Feulvarch, Eric; Drapier, Sylvain et al

in International Journal of Material Forming (2017), 10

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See detailTronc commun et différenciation : l'un ne va pas sans l'autre
Lafontaine, Dominique ULg

Conference given outside the academic context (2017)

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See detailSpatiotemporal variation of drought characteristics in the Huang- Huai-Hai Plain, China under the climate change scenario
Li, Xiangxiang; Ju, Hui; Garré, Sarah ULg et al

in Journal of Integrative Agriculture (2017)

Understanding the potential drought characteristics under climate change is essential to reduce vulnerability and establish adaptation strategies, especially in the Huang-Huai-Hai Plain (3H Plain), which ... [more ▼]

Understanding the potential drought characteristics under climate change is essential to reduce vulnerability and establish adaptation strategies, especially in the Huang-Huai-Hai Plain (3H Plain), which is the grain production base in China. In this paper, we investigated the variations in drought characteristics (drought event frequency, duration, severity, and intensity) for the past 50 years (1961–2010) and under future scenarios (2010–2099), based on the observed meteorological data and the RCP 8.5 scenario, respectively. First, we compared the applicability of three climatic drought indices: the standardized precipitation index (SPI), the standardized precipitation evapotranspiration index based on the Penman-Monteith equation (SPEI-PM) and the Thornthwaite equation (SPEI-TH) to trace the recorded agricultural drought areas. Then, we analyzed the drought characteristics using “run theory” for both historical observations and future RCP 8.5 scenario based on proper index. Correlation analyses between drought indices and agricultural drought areas showed that SPEI-PM performed better than SPI and SPEI-TH in the 3H Plain. Based on the results of SPEI-PM, the past 50 years have experienced reduced drought of shorter duration, and of weaker severity and intensity. However, under the future RCP 8.5 scenario, drought is expected to rise in frequency, duration, severity, and intensity from 2010–2099, although drought components during the 2010–2039 are predicted to be milder compared with the historical conditions. This study highlights that the estimations for atmospheric evaporative demand would bring in differences in the prediction of long-term drought trends by different drought indices. The results of this study can help inform researchers and local policy makers to establish drought management strategies [less ▲]

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See detailDeprivation of citizenship for 'jihadists' Analysis of Belgian and French practice and policy in light of the principle of equal treatment
Wautelet, Patrick ULg

in Kruiniger, Pauline (Ed.) Jihad, Islam en Recht. Jihadisme en reacties vanuit het Nederlandse en Belgische recht (2017)

In the fight against terrorism States have resorted to a variety of weapons. Much attention has been devoted to criminal law as a possible answer to terrorism. Many States have also resorted to ... [more ▼]

In the fight against terrorism States have resorted to a variety of weapons. Much attention has been devoted to criminal law as a possible answer to terrorism. Many States have also resorted to nationality law, using deprivation as a means to punish those involved in terrorism. This paper will focus on Belgium and France. These two countries indeed present striking similarities. Both in France and Belgium the provisions on deprivation already made it possible to deprive a national of his citizenship in terrorist cases. Nevertheless, the legislation in these countries has been recently modified to offer yet a stronger answer to terrorism. The public debate in the two countries is modelled on similar lines. This is in particular true for the issue of equality arising in connection of deprivation of nationality. The paper will first offer an overview of the existing statutory provisions in the two countries, before critically reviewing the discussion on equality and non discrimination. [less ▲]

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See detailPhotoreversibility and biocompatibility of polydimethylsiloxane-coumarin as adjustable intraocular lens material
Jellali, Rachid; Bertrand, Virginie ULg; Alexandre, Michaël et al

in Macromolecular Bioscience (2017)

Polydimethylsiloxane (PDMS) constitutes an interesting material for a variety of biomed- ical applications, especially as intraocular lenses (IOLs), for its excellent transparency. In this work, a ... [more ▼]

Polydimethylsiloxane (PDMS) constitutes an interesting material for a variety of biomed- ical applications, especially as intraocular lenses (IOLs), for its excellent transparency. In this work, a photoreversible PDMS-coumarin network, whose shape and properties can be adjusted postoperatively in a noninvasive manner, is developed. The synthesis of PDMS-cou- marin is achieved by amidation of a coumarin acid chloride derivative with amine-function- alized PDMSs. Under exposure of λ > 300 nm, these polymers can be cured by dimerization of coumarin. The cured polymers can be uncrosslinked via photocleavage of cyclobutane dimers upon illumination at λ < 290 nm. The diffusion of linear PDMSs in a crosslinked network and the controlled shape modification are studied, which demonstrate that these polymers are good candidates for adjustable IOL application. IOL disks prepared from these materials show high hydrophobicity and good transparency. In vitro cytotoxicity, lens epithelial cell adhesion assays, and rabbit host reaction against implanted disks demonstrate the biocompatibility of the polymer. [less ▲]

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See detailP-301 High Concentration Multistrain Probiotic Produced at Different Manufacturing Sites: Comparative Analysis.
Lombardi, Francesca; La Torre, Cristina; Giusti, Ilaria et al

in Inflammatory Bowel Diseases (2017), 23

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See detailRelevant Animal Models in Dermatophyte Research
Cambier, Ludivine ULg; Heinen, Marie-Pierre ULg; Mignon, Bernard ULg

in Mycopathologia (2017), 182(1), 229-240

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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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