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See detailJustice restauratrice
Dubois, Christophe ULg

in Hendrick, Aude; Musin, Aude; Rousseaux, Xavier (Eds.) et al Les mots de la justice (2017)

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See detailDe Actoren: inleiding
Dubois, Christophe ULg

in Hendrick, Aude; Musin, Aude; Rousseaux, Xavier (Eds.) et al Het verhaal van justitie (2017)

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See detailSlachtoffer
Dubois, Christophe ULg; Martin, Daniel

in Hendrick, Aude; Musin, Aude; Rousseaux, Xavier (Eds.) et al Het verhaal van justitie (2017)

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See detailHerstelgerichte Justitie
Dubois, Christophe ULg

in Hendrick, Aude; Musin, Aude; Rousseaux, Xavier (Eds.) et al Het verhaal van justitie (2017)

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See detailNonlinear Robust Control for Satellite Formation Flying via Adaptive Second-Order Sliding Modes
Cho, Hancheol ULg; Kerschen, Gaëtan ULg

in 27th AAS/AIAA Space Flight Mechanics Meeting, San Antonio 5-9 February 2017 (2017, February)

This paper presents a robust adaptive control methodology based on the concept of second-order sliding modes for satellite formation control in the presence of unknown, but bounded uncertainties. By ... [more ▼]

This paper presents a robust adaptive control methodology based on the concept of second-order sliding modes for satellite formation control in the presence of unknown, but bounded uncertainties. By introducing two sliding variables to achieve the concept of second-order sliding modes, a robust controller is designed so that it forces the first sliding variable to converge to a desired error box in a finite time. Then, the second sliding variable is automatically bounded in a much smaller region by sliding mode control theory, thereby considerably improving the control accuracy. The proposed control scheme is of a smooth form and effectively alleviates chattering. An adaptive law that updates the control gain is also presented without a priori knowledge of the uncertainties. Numerical simulations, in which a desired formation configuration is required to be precisely maintained under uncertain mass and external disturbances, are carried out to validate the efficiency and the accuracy of the proposed robust adaptive control scheme developed herein. [less ▲]

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See detailLearning from blind tests: Determining the function of experimental grinding stones through use-wear and residue analysis
Hayes, Elspeth H.; Cnuts, Dries ULg; Lepers, Christian et al

in Journal of Archaeological Science: Reports (2017), 11

Abstract Blind tests provide an objective means to evaluate the accuracy of functional interpretations based on the presence of use-wear and residue traces on stone tools. Previous blind tests have ... [more ▼]

Abstract Blind tests provide an objective means to evaluate the accuracy of functional interpretations based on the presence of use-wear and residue traces on stone tools. Previous blind tests have highlighted interpretive errors commonly associated with use-wear and residue analyses leading to significant methodological developments in each of the respective fields. While a number of blind tests have been performed on flaked stone tools, only a single blind test has been published for use-wear on grinding tools. We present the results of a two-part blind test performed on 15 experimental grinding implements that were used in a controlled setting, designed to evaluate the relative importance of residue analysis for determining the worked material (1) when contextual information is available and (2) when contextual information is absent. We argue that use-wear and residue analyses are successful procedures to identify the use of grinding stones, and that residue analysis may be a particularly valuable means for determining the worked material on tools that have insufficient use-wear development. We suggest that residues should be sufficiently abundant to infer use, if we are to avoid the potential confusion caused by contamination. [less ▲]

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See detailDe Barcelone à Amsterdam : l'émergence de la conservation intégrée à travers les colloques internationaux du Conseil de l'Europe et de l'ICOMOS
Houbart, Claudine ULg

Conference (2017, January 31)

En 1975, la notion de conservation intégrée est consacrée par la Charte européenne du Patrimoine architectural, adoptée par le Comité des Ministres du Conseil de l’Europe avant d’être solennellement ... [more ▼]

En 1975, la notion de conservation intégrée est consacrée par la Charte européenne du Patrimoine architectural, adoptée par le Comité des Ministres du Conseil de l’Europe avant d’être solennellement proclamée et développée au Congrès d’Amsterdam (21-25 octobre 1975). Renouvelant fondamentalement les pratiques de rénovation des centres anciens avec l’ambition de créer un dialogue entre aménageurs et conservateurs, cette approche résulte de dix années de réflexions nourries par des échanges entre experts principalement européens, initiés non seulement par le Conseil de l’Europe (Confrontations de Barcelone (1965), Bath (1966), La Haye (1967) et Avignon (1968)), mais également par l’ICOMOS, dès sa fondation en 1965 (Colloques de Cacérès (1965), Tunis (1966), Leningrad et Graz (1969), Lausanne (1973), Rothenburg et Bruges (1975)). Si un regard macroscopique révèle le rôle central joué par Piero Gazzola et Raymond Lemaire, respectivement président et secrétaire général de l’ICOMOS et auteurs, avec François Sorlin, d’une étude de synthèse préalable à la Charte européenne, cette contribution se propose d’augmenter la focale afin de révéler, à travers l’étude des actes des colloques, le rôle des réseaux d’acteurs en présence dans l’élaboration de la nouvelle politique. [less ▲]

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See detailCyanobacterial Contribution to Travertine Deposition in the Hoyoux River System, Belgium
Kleinteich, Julia; Golubic, Stjepko; Pessi, Igor S. et al

in Microbial Ecology (2017)

Travertine deposition is a landscape-forming process, usually building a series of calcareous barriers differentiating the river flow into a series of cascades and ponds. The process of carbonate ... [more ▼]

Travertine deposition is a landscape-forming process, usually building a series of calcareous barriers differentiating the river flow into a series of cascades and ponds. The process of carbonate precipitation is a complex relationship between biogenic and abiotic causative agents, involving adapted microbial assemblages but also requiring high levels of carbonate saturation, spontaneous degassing of carbon dioxide and slightly alkaline pH. We have analysed calcareous crusts and water chemistry from four sampling sites along the Hoyoux River and its Triffoy tributary (Belgium) in winter, spring, summer and autumn 2014. Different surface textures of travertine deposits correlated with particular microenvironments and were influenced by the local water flow. In all microenvironments, we have identified the cyanobacterium Phormidium incrustatum (Nägeli) Gomont as the organism primarily responsible for carbonate precipitation and travertine fabric by combining morphological analysis with molecular sequencing (16S rRNA gene and ITS, the Internal Transcribed Spacer fragments), targeting both field populations and cultures to exclude opportunistic microorganisms responding favourably to culture conditions. Several closely related cyanobacterial strains were cultured; however, only one proved identical with the sequences obtained from the field population by direct PCR. This strain was the dominant primary producer in the calcareous deposits under study and in similar streams in Europe. The dominance of one organism that had a demonstrated association with carbonate precipitation presented a valuable opportunity to study its function in construction, preservation and fossilisation potential of ambient temperature travertine deposits. These relationships were examined using scanning electron microscopy and Raman microspectroscopy. [less ▲]

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See detailAll Saved from Drowning? Afghan Refugees in Australia and Words Written in “The Ocean”: A Short Story by Gail Jones
Belleflamme, Valérie-Anne ULg

Conference (2017, January 27)

Gail Jones’s short story “The Ocean” was published in 2013 as part of an anthology edited by Thomas Keneally and Rosie Scott. Entitled A Country Too Far: Writings on Asylum Seekers, this anthology aimed ... [more ▼]

Gail Jones’s short story “The Ocean” was published in 2013 as part of an anthology edited by Thomas Keneally and Rosie Scott. Entitled A Country Too Far: Writings on Asylum Seekers, this anthology aimed to ask “some of [the] most admired Australian writers to bring a different perspective and depth to the public debate on asylum seekers”. With “The Ocean”, Jones takes up the challenge quite successfully and, I may also add, quite literally or meta-discursively. The short story’s two interwoven narratives are articulated following an ebb-and-flow movement that enhances the text’s play with the notions of liquidity and time. This is reminiscent of French philosopher Michel Serres’s view of time as made of counter-currents, undertows and turbulences. These liquid folds allow for originally distant points – with no link whatsoever – to become close, superimposed. This then creates an effect of strangeness which Jones cultivates, as when she claims that, since “we’re always in a forward-backward rhythm, not often fully here in the present moment” and “our present is inflected and intercepted by the past and the future, pleated and folded,” this means that, “if we were to see our contemporary world with the eyes of the future, we might see it suddenly aestheticized and made endearingly strange”. By focusing on Jones’s play with perspectives, her narrativisation of folds, and the intertextual link with Primo Levi’s The Drowned and the Saved, my paper will seek to investigate how Jones’s writing not only claims an ethical and moral dimension but also takes up a political stance: it is by writing from multiple perspectives and thus forging unexpected connections, allowing people of different backgrounds, cultures and religions to interconnect, that Jones voices resistance to the narrow-mindedness of those who are privileged in today’s world-wide migration crisis. [less ▲]

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See detailLes défis pour les CPAS en Wallonie au cours des dix prochaines années
Behrendt, Christian ULg

Conference given outside the academic context (2017)

Exposé donné lors du colloque organisé par la Fédération des CPAS de l'Union des Villes et Communes de Wallonie, Namur, CPAS de Namur, 27 janvier 2017

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See detailAdaptation et psychopathologie
Englebert, Jérôme ULg

Scientific conference (2017, January 26)

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See detailEmbarquement pour Mars
Stiepen, Arnaud ULg

Conference given outside the academic context (2017)

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See detailObjectif Mars: défi ou utopie?
Stiepen, Arnaud ULg

Conference given outside the academic context (2017)

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See detailLes pathologies de l’adaptation et l'adaptation des pathologies
Englebert, Jérôme ULg

Scientific conference (2017, January 21)

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See detailUse of complementary biophysical approaches to study the interactions of fatty acid hydroperoxides with biomimetic plant plasma membranes
Deboever, Estelle ULg; Nasir, Mehmet Nail ULg; Deleu, Magali ULg et al

Scientific conference (2017, January 20)

In the actual context, biopesticides have emerged as a main alternative to conventional agriculture1. Hence, elicitors are metabolites naturally produced by microorganisms, pathogenic or not, and plants ... [more ▼]

In the actual context, biopesticides have emerged as a main alternative to conventional agriculture1. Hence, elicitors are metabolites naturally produced by microorganisms, pathogenic or not, and plants which are able to induce the natural resistance of plants. Also, they have proved to be excellent candidates for biological control. In this context, the lipoxygenase pathway leads to the formation of fatty acid degradation products, called oxylipins, which appear to be crucial agents in plant defence mechanisms2,3. Moreover, with their broad spectrum of action and their possible inducibility, oxylipins appear to be promising candidates for their use as elicitors4. This work focuses on two hydroperoxy-derived oxylipins, the 13(S)-hydroperoxy-octadecadienoic acid (13-HPOD) and the 13(S)-hydroperoxy-octadecatrienoic acid (13-HPOT). The study of the interaction of such compounds with representative plant plasma membrane lipids is essential to understand plant resistance mechanisms. Several in silico and experimental techniques of biophysics showed that acyl-hydroperoxides have significant adsorption capacity and a strong affinity for model membranes. They may also penetrate biological membrane but no permeabilisation effect was observed in this work. Slight conformational differences seem to have a significant impact on their ability to interact with plant plasma membranes. Based on these results, further investigation of the interactions of fatty acids hydroperoxides, even more on the 9-forms, with plant plasma membranes and eventually in the presence of phytopathogenic species, would allow a better understanding of the innate immunity and, on the longer term, could lead to the development of new elicitors with biological mechanisms potentially independent of membrane protein receptors. [less ▲]

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See detailPresent-day central African forest is a legacy of the 19th century human history
Morin, Julie ULg; Fayolle, Adeline ULg; Favier, Charly et al

in eLife (2017)

The populations of light-demanding trees that dominate the canopy of central African forests are now aging. Here, we show that the lack of regeneration of these populations began ca. 165 ya (around 1850 ... [more ▼]

The populations of light-demanding trees that dominate the canopy of central African forests are now aging. Here, we show that the lack of regeneration of these populations began ca. 165 ya (around 1850) after major anthropogenic disturbances ceased. Since 1885, less itinerancy and disturbance in the forest has occurred because the colonial administrations concentrated people and villages along the primary communication axes. Local populations formerly gardened the forest by creating scattered openings, which were sufficiently large for the establishment of light-demanding trees. Currently, common logging operations do not create suitable openings for the regeneration of these species, whereas deforestation degrades landscapes. Using an interdisciplinary approach, which included paleoecological, archaeological, historical, and dendrological data, we highlight the long-term history of human activities across central African forests and assess the contribution of these activities to present-day forest structure and composition. The conclusions of this sobering analysis present challenges to current silvicultural practices and to those of the future. [less ▲]

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See detailCryopreservation of chicken primordial germ cells by vitrification and slow-freezing: a comparative study
Tonus, Céline ULg; Connan, Delphine ULg; Waroux, Olivier ULg et al

in Theriogenology (2017), 88

In the present study, we compare a classical slow freezing method and an aseptic vitrification technique to cryopreserve a stable Primordial Gem Cells (PGCs) line issued from the Ardennaise chicken breed ... [more ▼]

In the present study, we compare a classical slow freezing method and an aseptic vitrification technique to cryopreserve a stable Primordial Gem Cells (PGCs) line issued from the Ardennaise chicken breed. Viability immediately after warming was close to 80% and did not differ between the two cryopreservation methods. Proliferation tended to be slower for both cryopreservation methods compared to controls, but the difference was significant only for vitrification. No difference was found between the two methods after flow cytometry analysis of SSEA-1 expression and RT-PCR on several factors related to PGCs phenotype. After one week in culture, all cryopreserved cells reached controls main morphological and expanding (viability/proliferation) features. However, slow freezing generated more unwanted cells clusters than vitrification. After injection of the PGCs into recipient embryos, vitrified PGCs showed a clear, yet not significant, tendency to colonize the gonad at a higher rate than slow frozen PGCs. Slow freezing in cryovials remains simple, inexpensive and less technically demanding than vitrification. Nevertheless, the intrinsic advantages of our aseptic vitrification method and the present study suggest that this should be considered as safer than classical slow freezing for cryopreserving chicken PGCs. [less ▲]

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See detailRegard juridique sur la fusion des communes : fondements, modalités et mise en œuvre d’une réforme controversée
Bouhon, Frédéric ULg

Conference given outside the academic context (2017)

Cette conférence destinée au grand public visait à exposer les enjeux, les fondements et les implications de la fusion des communes, opérée en Belgique en 1977.

Detailed reference viewed: 33 (2 ULg)