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See detailMicrofossiles végétaux
Vanguestaine, m; Steemans, Philippe ULg; Streel, Maurice ULg

in Mémoires de la Société géologique et minéralogique de Bretagne (1986), 3

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See detailMicrofossiles végétaux du Tournaisien Inferieur dans le core-drill de Brévillers (Pas-de-Calais).
Combaz, A; Streel, Maurice ULg

in Streel, Maurice; Wagner, R.H. (Eds.) Colloque sur la Stratigraphie du Carbonifère, Liège 1970 (1971)

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See detailMicrofossils
Javaux, Emmanuelle ULg; Benzerara, karim

in Comptes Rendus Palevol (2009), 8(7), 605-615

Defining biosignatures, i.e. features that are indicative of past or present life, has been one of the major strategies developed over the last few years for the search of life on the early Earth and in ... [more ▼]

Defining biosignatures, i.e. features that are indicative of past or present life, has been one of the major strategies developed over the last few years for the search of life on the early Earth and in the solar system. Current knowledge about microscopic remnants of fossil organisms, namely microfossils are reviewed, focusing on: (i) studies of recent environments used as analogues for the early Earth or extraterrestrial environments; (ii) examination of Precambrian rocks; and (iii) laboratory experiments simulating biotic and abiotic processes and resulting in the formation of genuine or pseudomicrofossils. Fossils’ preservation depends on environment and chemical composition of the primary structure, although they might undergo taphonomic processes that alter their morphology and/or composition. Altogether, these examples illustrate what can be potentially preserved during the very first stages of fossilization and what can be left in the geological record after diagenesis and metamorphism. Finally, this provides a rationale to tentatively define diagnosis criteria for microfossils or ways to look for life on Earth or in extraterrestrial environments. [less ▲]

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See detailMicrofossils
Javaux, Emmanuelle ULg

in Gargaud et al (Ed.) Encyclopedia of Astrobiology (2011)

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See detailMicrofossils from early Earth
Javaux, Emmanuelle ULg

in Nature Geoscience (2011), 4(10), 663-665

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See detailMicrofossils in Paleoproterozoic siliciclastic successions of Karelia, Russia
Medvedev, Pavel; Javaux, Emmanuelle ULg

Conference (2008, April)

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See detailMicrofossils’ diversity from the Proterozoic Taoudeni Basin, Mauritania
Beghin, Jérémie ULg; Javaux, Emmanuelle ULg; Houzay, Jean-Pierre et al

in European Geosciences Union General Assembly 2014 Vienna, Austria, 27 April – 02 May 2014 (abstract book) (2014, April 27)

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See detailMicrogéographie et évolution industrielle de la Wallonie
Merenne-Schoumaker, Bernadette ULg

in Revue Belge de Géographie (1984), (108-2), 93-113

This article aims to show microgeography's contribution to the analysis of industrial space in Wallonia. As far as we are concerned its contribution is twofold: in the first instance it helps to ... [more ▼]

This article aims to show microgeography's contribution to the analysis of industrial space in Wallonia. As far as we are concerned its contribution is twofold: in the first instance it helps to understand the reason for the different localisations and, secondly, it brings to the fore and explains the transformations in distribution. Furthermore, this work also makes it possible to carry out very detailed surveys on the scale of a commune, a town-district or even a road. When collating the existing research on Wallonia one is, inevitably, led to liken this region to other European economic entities industrialised in the 19th Century. Indeed, one finds simi-litaries such as the co-existence of old sites and new localisations as well as the presence of many abandoned sites. In addition one can bring to the fore processes which exist elsewhere, namely disindustrialisation of towns, exurbanisation of activities and new attempts ol reintegrate industry into urban environment. [less ▲]

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See detailMicrogravity-induced matrix remodelling is linked to reduction in tension of human dermal fibroblasts
Guignandon, A.; Lambert, Charles ULg; Réga, Georgette et al

in Journal of Gravitational Physiology : A Journal of the International Society for Gravitational Physiology (2005), 12(1),

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See detailMicrogrids and their destructuring effects on the electrical industry
Ernst, Damien ULg

Speech/Talk (2014)

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See detailMicrogyroscope control system using a high-order band-pass continuous-time sigma-delta modulator
Dong, Yufeng; Kraft, Michaël ULg; Hedenstierna, N. et al

in TRANSDUCERS 2007 (2007, June)

The paper presents a novel 6th order continuous-time, force-feedback band-pass sigma-delta modulator control system for the sense mode of micromachined vibratory gyroscopes. Compared with the architecture ... [more ▼]

The paper presents a novel 6th order continuous-time, force-feedback band-pass sigma-delta modulator control system for the sense mode of micromachined vibratory gyroscopes. Compared with the architecture using a low-pass sigma-delta modulator, this band-pass solution uses a much lower sampling frequency for the sigma-delta modulator and thus reduces the requirement for frequency response of the detection interface and control electronics. In this work, the sigma-delta modulator operates at only 40 kHz which allowed its implementation in a continuous-time circuit using discrete electronic components on a PCB; this has the advantage of simple prototyping and can improve the signal anti-aliasing characteristics. [less ▲]

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See detailMicrogyroscope control system using a high-order band-pass continuous-time sigma-delta modulator
Dong, Yufeng; Kraft, Michaël ULg; Hedenstierna, N. et al

in Sensors and Actuators A (2008), 145-146(Jul.-Aug.), 299--305

The paper presents a novel 6th order continuous-time, force-feedback band-pass sigma-delta modulator control system for the detection mode of micromachined vibratory gyroscopes. Compared with the ... [more ▼]

The paper presents a novel 6th order continuous-time, force-feedback band-pass sigma-delta modulator control system for the detection mode of micromachined vibratory gyroscopes. Compared with the architecture using a low-pass sigma-delta modulator, this band-pass solution uses a much lower sampling frequency for the sigma-delta modulator and thus reduces the requirement for frequency response of the detection interface and control electronics. In this work, the sigma-delta modulator operates at only four times of mechanical resonant frequency, which allowed its implementation in a continuous-time circuit using discrete electronic components on a PCB; this has the advantage of simple prototyping and can improve the signal anti-aliasing characteristics. [less ▲]

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See detailThe MicroH2 project:an association of four laboratories to improve theknowledge on biohydrogen production precesses
Beckers, Laurent ULg; Calusinska, Magdalena ULg; Hamilton, Christopher ULg et al

Poster (2012, June 04)

This poster presents a collaborative research project (MicroH2) held at the University of Liège (Belgium) since 2007 (www.microh2.ulg.ac.be) and involving four different research groups. The project aims ... [more ▼]

This poster presents a collaborative research project (MicroH2) held at the University of Liège (Belgium) since 2007 (www.microh2.ulg.ac.be) and involving four different research groups. The project aims to develop a center of excellence in the fields of photo- and dark- biohydrogen production. Our studies contribute to improve the knowledge of the processes involved in the microbiological production of hydrogen, from a fundamental and practical point of view. Some results are highlighted here. The research concerning photofermentation focuses on the interactions between respiration, photosynthesis and H2-producing pathways in algal microorganisms, by using mitochondrial mutants and genetically modified strains with modified ability for hydrogen production [1-2]. To study the metabolism of the hydrogen production by anaerobic bacteria, pure cultures and defined consortia are used and their production of biogas and soluble metabolites is measured. Moreover, we have developed and optimized molecular tools, like quantitative RT-PCR and FISH, to monitor the variations of bacterial populations in novel bioreactors for hydrogen production [3-4]. We have also mined the complete genomes of Clostridium spp. for putative hydrogenase genes and found a large diversity of them [5]. [less ▲]

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See detailMicrohabitats survey used in river restoration
Peeters, Alexandre ULg; Hallot, Eric ULg; Houbrechts, Geoffrey ULg et al

Conference (2011, October 14)

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See detailMicroleakage after thermocycling of 4 etch and rinse and 3 self-etch adhesives with and without a flowable composite lining
Guéders, Audrey; Charpentier, Joseph ULg; Albert, Adelin ULg et al

in Operative Dentistry (2006), 31(4), 450-455

This study evaluated the microleakage of composite fillings prepared with 4 etch and rinse and 3 self-etch adhesive systems after thermocycling. Also evaluated was the potential improvement of cavity ... [more ▼]

This study evaluated the microleakage of composite fillings prepared with 4 etch and rinse and 3 self-etch adhesive systems after thermocycling. Also evaluated was the potential improvement of cavity sealing when utilizing a low charge resine lining for preparations. [less ▲]

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See detailMicroleakage after thermocycling of three self-etch adhesives under resin-modified glass-ionomer cement restorations
Geerts, Sabine ULg; Seidel, Laurence ULg; Albert, Adelin ULg et al

in International Journal of Dentistry [=IJD] (2010), ID 728453

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See detailMicrolensing Binaries Discovered through High-magnification Channel
Shin, I.-G.; Choi, J.-Y.; Park, S.-Y. et al

in Astrophysical Journal (2012), 746

Microlensing can provide a useful tool to probe binary distributions down to low-mass limits of binary companions. In this paper, we analyze the light curves of eight binary-lensing events detected ... [more ▼]

Microlensing can provide a useful tool to probe binary distributions down to low-mass limits of binary companions. In this paper, we analyze the light curves of eight binary-lensing events detected through the channel of high-magnification events during the seasons from 2007 to 2010. The perturbations, which are confined near the peak of the light curves, can be easily distinguished from the central perturbations caused by planets. However, the degeneracy between close and wide binary solutions cannot be resolved with a 3σ confidence level for three events, implying that the degeneracy would be an important obstacle in studying binary distributions. The dependence of the degeneracy on the lensing parameters is consistent with a theoretical prediction that the degeneracy becomes severe as the binary separation and the mass ratio deviate from the values of resonant caustics. The measured mass ratio of the event OGLE-2008-BLG-510/MOA-2008-BLG-369 is q ~ 0.1, making the companion of the lens a strong brown dwarf candidate. [less ▲]

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See detailMicrolensing Binaries with Candidate Brown Dwarf Companions
Shin, I.-G.; Han, C.; Gould, A. et al

in Astrophysical Journal (2012), 760

Brown dwarfs are important objects because they may provide a missing link between stars and planets, two populations that have dramatically different formation histories. In this paper, we present the ... [more ▼]

Brown dwarfs are important objects because they may provide a missing link between stars and planets, two populations that have dramatically different formation histories. In this paper, we present the candidate binaries with brown dwarf companions that are found by analyzing binary microlensing events discovered during the 2004-2011 observation seasons. Based on the low mass ratio criterion of q < 0.2, we found seven candidate events: OGLE-2004-BLG-035, OGLE-2004-BLG-039, OGLE-2007-BLG-006, OGLE-2007-BLG-399/MOA-2007-BLG-334, MOA-2011-BLG-104/OGLE-2011-BLG-0172, MOA-2011-BLG-149, and MOA-201-BLG-278/OGLE-2011-BLG-012N. Among them, we are able to confirm that the companions of the lenses of MOA-2011-BLG-104/OGLE-2011-BLG-0172 and MOA-2011-BLG-149 are brown dwarfs by determining the mass of the lens based on the simultaneous measurement of the Einstein radius and the lens parallax. The measured masses of the brown dwarf companions are 0.02 ± 0.01 M [SUB]&sun;[/SUB] and 0.019 ± 0.002 M [SUB]&sun;[/SUB] for MOA-2011-BLG-104/OGLE-2011-BLG-0172 and MOA-2011-BLG-149, respectively, and both companions are orbiting low-mass M dwarf host stars. More microlensing brown dwarfs are expected to be detected as the number of lensing events with well-covered light curves increases with new-generation searches. [less ▲]

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