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See detailA fresh look on the limit on ultralight axion-like particles from SN1987A
Payez, Alexandre ULg

in 10th Patras Workshop on Axions, WIMPs and WISPs (in press)

We revisit the limit on very light axion-like particles (ALPs) from the absence of gamma rays coincidental with the neutrino burst from SN1987A. We use updated supernova simulations, modern models for the ... [more ▼]

We revisit the limit on very light axion-like particles (ALPs) from the absence of gamma rays coincidental with the neutrino burst from SN1987A. We use updated supernova simulations, modern models for the magnetic field inside the Galaxy, and a Primakoff cross section which takes into account proton-degeneracy and mass-reduction effects. We finally give an updated exclusion plot for the electromagnetic coupling of sub-eV ALPs, comparing our new bound with other limits as well as with future ALP searches. [less ▲]

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See detailResting-state test–retest reliability of a priori defined canonical networks over different preprocessing steps
Varikuti, Deepthi; Hoffstaedter, Felix; Genon, Sarah ULg et al

in Brain Structure & Function (in press)

Resting-state functional connectivity analysis has become a widely used method for the investigation of human brain connectivity and pathology. The measurement of neuronal activity by functional MRI ... [more ▼]

Resting-state functional connectivity analysis has become a widely used method for the investigation of human brain connectivity and pathology. The measurement of neuronal activity by functional MRI, however, is impeded by various nuisance signals that reduce the stability of functional connectivity. Several methods exist to address this predicament, but little consensus has yet been reached on the most appropriate approach. Given the crucial importance of reliability for the development of clinical applications, we here investigated the effect of various confound removal approaches on the test–retest reliability of functional connectivity estimates in two previously defined functional brain networks. Our results showed that gray matter masking improved the reliability of connectivity estimates, whereas denoising based on principal components analysis reduced it. We additionally observed that refraining from using any correction for global signals provided the best test–retest reliability, but failed to reproduce anti-correlations between what have been previously described as antagonistic networks. This suggests that improved reliability can come at the expense of potentially poorer biological validity. Consistent with this, we observed that reliability was proportional to the retained variance, which presumably included structured noise, such as reliable nuisance signals (for instance, noise induced by cardiac processes). We conclude that compromises are necessary between maximizing test–retest reliability and removing variance that may be attributable to non-neuronal sources. [less ▲]

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See detailModeling the strain localization around an underground gallery with a hydro-mechanical double scale model; effect of anisotropy
van den Eijnden, AP; Bésuelle, Pierre; Collin, Frédéric ULg et al

in Computers and Geotechnics (in press)

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See detailThe impact of architectural representations on conveying design intent.
Cunin, Maxime; Yang, Maria C.; Elsen, Catherine ULg

in AI EDAM: Artificial Intelligence for Engineering Design Analysis and Manufacturing (in press)

Architects express themselves graphically in order to communicate ideas both to clients and to themselves. In practice, they rely on a variety of representations such as free-hand drawings, 3D computer ... [more ▼]

Architects express themselves graphically in order to communicate ideas both to clients and to themselves. In practice, they rely on a variety of representations such as free-hand drawings, 3D computer rendered images, and photomontages to convey their design intent. Research to date has demonstrated differences and commonalities in the ways in which expert designers and laymen perceive visual understanding. It is still unclear how architects themselves use different types of representations to express different intentions, and how accurately their expected audience perceives those intentions. The purpose of this research is to investigate how laymen interpret the initial design intent of an architect’s design, and what role different forms of representations play in this process of understanding a design. This paper describes a five-step process for developing a survey that was used to gather data from 686 laymen respondents. It was found that certain types of simpler representations presented in specific contexts are unexpectedly found to be a more efficient way to faithfully transmit an architectural intent. [less ▲]

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See detailStein's method for comparison of univariate distributions
Ley, Christophe; Reinert, Gesine; Swan, Yvik ULg

in Probability Surveys (in press)

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See detailBasic Principles of White Dwarf Asteroseismology
Fontaine, Gilles; Brassard, Pierre; Charpinet, Stéphane et al

in Napiwotzki, R.; Burleigh, M. (Eds.) The White Dwarfs Stars (in press)

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See detailApproches ergonomiques et approches psychosociologiques de la formation : mise en perspective conceptuelle et praxéologique
Faulx, Daniel ULg; Petit, Lucie

in Actes du 16ème Congrès de Psychologie du Travail et des Organisation de Langue Française. (in press)

From both a scientific and a practical point of view, two major trends seem to presently rule the adult training field: the psychosociological trend and the ergonomic trend. Though each one has widely ... [more ▼]

From both a scientific and a practical point of view, two major trends seem to presently rule the adult training field: the psychosociological trend and the ergonomic trend. Though each one has widely contributed in developing training in organizational human resources development, we fail to see any significant level of understanding between the two trends or any dialogue based on scientific objectivity. The aim of this present paper is to hopefully initiate a dialogue with an eye towards development in training practices. A better understanding of these main approaches would bring help to those who seek to train personnel and to better orientate their choice of training. [less ▲]

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See detailRelations on words
Rigo, Michel ULg

in Indagationes Mathematicae (in press)

In the first part of this survey, we present classical notions arising in combinatorics on words: growth function of a language, complexity function of an infinite word, pattern avoidance, periodicity and ... [more ▼]

In the first part of this survey, we present classical notions arising in combinatorics on words: growth function of a language, complexity function of an infinite word, pattern avoidance, periodicity and uniform recurrence. Our presentation tries to set up a unified framework with respect to a given binary relation. In the second part, we mainly focus on abelian equivalence, $k$-abelian equivalence, combinatorial coefficients and associated relations, Parikh matrices and $M$-equivalence. In particular, some new refinements of abelian equivalence are introduced. [less ▲]

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See detailResidues in beeswax: a health risk for the consumer of honey and beeswax?
Wilmart, O; Legrève, A; Scippo, Marie-Louise ULg et al

in Journal of Agricultural and Food Chemistry (in press)

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See detailEffects of an experimental resource pulse on the macrofaunal assemblage inhabiting seagrass macrophytodetritus
Remy, François ULg; Gobert, Sylvie ULg; Lepoint, Gilles ULg

in Belgian Journal of Zoology (in press)

Physical disturbances and resource pulses are major structuring drivers of terrestrial and aquatic ecosystems. The accumulations of exported dead leaves from the Neptune grass, Posidonia oceanica (L ... [more ▼]

Physical disturbances and resource pulses are major structuring drivers of terrestrial and aquatic ecosystems. The accumulations of exported dead leaves from the Neptune grass, Posidonia oceanica (L.) Delile are ephemeral and highly dynamic detrital habitats offering food sources and shelter for vagile macrofauna community. These habitats are frequently subject to wind and storms which can add “new” detrital material to previous accumulations; these can be defined as resource pulses and could potentially impact the associated macrofauna. This study assesses the impact of an experimental resource pulse on the macrofauna associated with exported P. oceanica litter accumulations. The experimental design consisted of two pulse treatments (the addition of dead leaves with and without the associated fauna), and two controls (one procedural, and one total control), where the added material was left underwater for 14 days. Invertebrates then present in the sampled detritus were all identified and counted. Our data suggest that the responses of these invertebrates to resource pulses present intermediate characteristics between aquatic and terrestrial ecosystems responses. Inputting a moderate amount of dead P. oceanica leaves into experimental mesocosms had a non-negligible impact and rapidly affected the macrofauna community. Specialist detritivores species were boosted while herbivore/detritivore species dramatically decreased. Predators also showed a modest but significant density increase, demonstrating the fast propagation of the pulse response throughout the entire community and through several trophic levels. Strict hypoxia-tolerant species were also only observed in the treated mesocosms, indicating the strong influence of resource pulses on physico-chemical conditions occurring inside litter accumulations. [less ▲]

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See detailThe use of 16S rRNA gene metagenetic monitoring of refrigerated food products for understanding the kinetics of microbial subpopulations at different storage temperatures: the example of white pudding
Cauchie, Emilie ULg; Gand, Mathieu; Kergourlay, Gilles ULg et al

in International Journal of Food Microbiology (in press)

In order to control food losses and wastage,monitoring the microbial diversity of food products, during processing and storage is important, as studies have highlighted the metabolic activities of ... [more ▼]

In order to control food losses and wastage,monitoring the microbial diversity of food products, during processing and storage is important, as studies have highlighted the metabolic activities of somemicroorganismswhich can lead to spoilage. Knowledge of this diversity can be greatly improved by using a metagenetic approach based on high throughput 16S rRNA gene sequencing, which enables a much higher resolution than culture-based methods. Moreover, the Jameson effect, a phenomenon described by Jameson in 1962, is often used to classify bacterial strains within an ecosystem. According to this, we have studied the bacterial microbiota of Belgian white pudding during storage at different temperatures using culture-dependent and independent methods. The product was inoculated with a mix of dominant strains previously isolated from this foodstuff at the end of its shelf life (Carnobacterium maltaromaticum, Lactobacillus fuchuensis, Lactobacillus graminis, Lactobacillus oligofermentans, Lactococcus lactis, Leuconostoc mesenteroides, Raoultella terrigena and Serratia sp.). Daily during 16 days, the absolute abundance of inoculated strain was monitored by combining total count on plate agar and metagenetic analysis. The resultswere confirmed by qPCR analysis. The growth of each specieswasmodelled for each temperature conditions, representative of good or bad storage practices. These data allowed the bacterial strains subdivision into three classes based on criteria of growth parameters for the studied temperature: the “dominant”, the “subdominant” and the “inhibited” bacterial species, according to their maximal concentration (Nmax, log CFU/g), growth rate (μmax, 1/h) and time to reach the stationary phase (TRSP, days). Thereby, depending on the storage conditions, these data have permitted to follow intrinsically the evolution of each strain on the bacterial ecosystemof Belgianwhite pudding. Interestingly, it has shown that the reliability of the Jameson effect can be discussed. For example, at 4 °C when Lactococcus lactis and Serratia sp. stopped growth at day 12, at the same time Carnobacterium maltaromaticum reached its maximal concentration and entered its stationary phase. In opposition to this, it can be noticed that in the same condition, the “sub-dominant” organisms continued their growth independently of the “dominant” species behaviour. In this case, the Jameson effect was not illustrated. This pattern is described for all storage conditions with the same strain classifications. These results highlighted the importance of combining metagenetic analysis and classical methods, with modelling, to offer a new tool for studying the evolution ofmicroorganisms present in perishable foodwithin different environmental conditions. [less ▲]

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See detailCarte géologique de Wallonie (Belgique) 1/10.000. 54/1 Natoye
Marion, Jean-Marc ULg; Barchy, Laurent

Cartographic material (in press)

New geological map of Wallonia published at the scale of 1/25.000, based on a new field work and using previous scientific data produced since the previous editions in 1882-83 (1/20.000, by Dupont ... [more ▼]

New geological map of Wallonia published at the scale of 1/25.000, based on a new field work and using previous scientific data produced since the previous editions in 1882-83 (1/20.000, by Dupont, Mourlon and Purves) and 1905 (1/40.000, by Mourlon and Dewalque) [less ▲]

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See detailComment la participation à une recherche contribue au développement professionnel : le cas des exemples à l’Université
Fossion, Gilles ULg; Faulx, Daniel ULg

in Recherches Qualitatives (in press)

La recherche scientifique constitue un des piliers centraux de l’activité universitaire. Nous nous sommes donc questionnés sur les apprentissages générés par celle-ci. Après avoir brièvement décrit les ... [more ▼]

La recherche scientifique constitue un des piliers centraux de l’activité universitaire. Nous nous sommes donc questionnés sur les apprentissages générés par celle-ci. Après avoir brièvement décrit les objectifs et enjeux de cette communication, nous proposons une présentation des objectifs et de la méthodologie de la recherche que nous avons menée au sein des Facultés de Psychologie et des Sciences de l’Éducation de l’Université de Liège. Nous poursuivons, enfin, par la mise en évidence de ses principaux résultats. Ces résultats se situent sur deux niveaux. D’une part, nous présentons les résultats inhérents à la recherche - relative aux impacts générés par la mobilisation de l’exemple au sein du discours pédagogique - et qui contribue à l’enrichissement du champ scientifique abordé. D’autre part, nous abordons les résultats qui permettent la mise en évidence de l’aspect formatif que revêt la participation à une recherche scientifique pour les acteurs. [less ▲]

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See detailSwitching Costs in Two-sided Markets
Lam, Wing Man Wynne ULg

in Journal of Industrial Economics (in press)

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See detailUse of a metagenetic approach to monitor the bacterial microbiota of “Tomme d’Orchies” cheese during the ripening process
Ceugniez, Alexandre; Taminiau, Bernard ULg; Coucheney, Françoise et al

in International Journal of Food Microbiology (in press)

The study of microbial ecosystems in artisanal foodstuffs is important to complete in order to unveil its diversity. The number of studies performed on dairy products has increased during the last decade ... [more ▼]

The study of microbial ecosystems in artisanal foodstuffs is important to complete in order to unveil its diversity. The number of studies performed on dairy products has increased during the last decade, particularly those performed on milk and cheese derivative products. In this work, we investigated the bacterial content of "Tomme d'Orchies" cheese, an artisanal pressed and uncooked French cheese. To this end, a metagenetic analysis, using Illumina technology, was utilized on samples taken from the surface and core of the cheese at 0, 1, 3, 14 and 21 days of ripening process. In addition to the classical microbiota found in cheese, various strains likely from environmental origin were identified. A large difference between the surface and the core content was observed within samples withdrawn during the ripening process. The main species encountered in the core of the cheese were Lactococcus spp. and Streptococcus spp., with an inversion of this ratio during the ripening process. Less than 2.5% of the whole population was composed of strains issued from environmental origin, as Lactobacillales, Corynebacterium and Brevibacterium. In the core, about 85% of the microbiota was attributed to the starters used for the cheese making. In turn, the microbiota of the surface contained less than 30% of these starters and interestingly displayed more diversity. The predominant genus was Corynebacterium sp., likely originating from the environment. The less abundant microbiota of the surface was composed of Bifidobacteria, Brevibacterium and Micrococcales. To summarize, the “Tomme d’Orchies” cheese displayed a high diversity of bacterial species, especially on the surface, and this diversity is assumed to arise from the production environment and subsequent ripening process. [less ▲]

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See detailCarte géologique de Wallonie (Belgique) 1/10.000, 59/4 Nassogne
Barchy, Laurent; Dejonghe, Léon; Marion, Jean-Marc ULg

Cartographic material (in press)

New geological map of Wallonia published at the scale of 1/25.000 based on a new field work and using previous scientific data, produced since the previous edition published in 1900 (Stainer)

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See detailLes désignations romanes de l'ECUREUIL
Boutier, Marie-Guy ULg; Baiwir, Esther ULg

in Contini, Michel; Veny, Joan (Eds.) Atlas linguistique roman (ALiR) (in press)

L'ALiR a pour objectif de fournir une description globale du lexique roman par champ sémantique, à travers l'étude onomasiologique des désignations romanes de concepts. Les analyses lexicale, phonétique ... [more ▼]

L'ALiR a pour objectif de fournir une description globale du lexique roman par champ sémantique, à travers l'étude onomasiologique des désignations romanes de concepts. Les analyses lexicale, phonétique, morphosyntaxiques sont mises en valeur par la production de cartes interprétatives. [less ▲]

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See detailCarte géologique de Wallonie (Belgique) 1/10.000. 55/2 Mormont
Barchy, Laurent; Marion, Jean-Marc ULg

Cartographic material (in press)

New geological map of Wallonia published at the scale of 1/25.000, based on a new field work and using previous scientific data produced since the previous editions in 1885 (sheet Durbuy at 1/20.000, by ... [more ▼]

New geological map of Wallonia published at the scale of 1/25.000, based on a new field work and using previous scientific data produced since the previous editions in 1885 (sheet Durbuy at 1/20.000, by Dupont and Purves) and 1905 (1/40.000, by Stainier) [less ▲]

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