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See detailA Mossbauer spectral study of the GdCo4-xFexB compounds
Grandjean, Fernande ULg; Hermann, Raphaël ULg; Popiel, E. et al

in Journal of Applied Physics (2007), 101(2),

The iron-57 Mossbauer spectra of the GdCo4-xFexB compounds, where x is 0.10, 0.15, 0.20, 0.25, 1, 2, 2.5, and 2.6, have been measured at room temperature and reveal relatively small iron hyperfine fields ... [more ▼]

The iron-57 Mossbauer spectra of the GdCo4-xFexB compounds, where x is 0.10, 0.15, 0.20, 0.25, 1, 2, 2.5, and 2.6, have been measured at room temperature and reveal relatively small iron hyperfine fields of approximately 12-18 T, relatively large quadrupole interactions of approximately +0.9 and -1 mm/s, and three very different types of spectra for x=0.10 and 0.15, x=0.25, 1, and 2, and x=2.5 and 2.6. The differences result from both the different easy magnetization directions in these compounds and the different cobalt and/or iron occupancies of the crystallographic 2c and 6i sites. The spectra have been fitted by calculating the spectral absorption with the complete iron-57 nuclear excited state Hamiltonian for the iron 2c and 6i sites. The fits have used an asymmetry parameter eta and Euler angles theta and phi that relate the hyperfine field to the iron electric field gradient axes of each crystallographic site in an orientation that is consistent with the structural and magnetic properties of the site. The results of the fits indicate both that the full Hamiltonian approach is required for physically reasonable spectral fits and that the small observed fields result from the presence of large orbital contributions which subtract from the Fermi contact contributions to the magnetic hyperfine fields of the two sites. The iron 2c occupancy obtained from the Mossbauer spectral area has been used to model the compositional dependence of the magnetic anisotropy constant in the GdCo4-xFexB compounds. (c) 2007 American Institute of Physics. [less ▲]

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See detailMossbauer spectral study of the magnetocaloric FeMnP1-xAsx compounds
Hermann, Raphaël ULg; Tegus, O.; Bruck, E. et al

in Physical Review b (2004), 70(21),

The magnetic phase transitions in the FeMnP1-xAsx compounds with x= 0.25, 0.35, 0.45, 0.50, and 0.55, have been studied by iron-57 Mossbauer spectroscopy. The ferromagnetic and antiferromagnetic spectra ... [more ▼]

The magnetic phase transitions in the FeMnP1-xAsx compounds with x= 0.25, 0.35, 0.45, 0.50, and 0.55, have been studied by iron-57 Mossbauer spectroscopy. The ferromagnetic and antiferromagnetic spectra have been analyzed with a model that takes into account the random distribution of the P and As near-neighbor anions of a given iron site. This distribution is a binomial distribution of the contributions to the spectra of each iron with n As near neighbors. A magnetostriction model has been used to characterize the temperature induced paramagnetic to ferromagnetic first-order phase transition and order parameters, eta(F)=2.6, 2.3, 2.0, 1.57, and 1.43 have been obtained for x=0.25, 0.35, 0.45, 0.50, and 0.55, respectively. A detailed phase diagram has been derived from the Mossbauer spectral analysis and reveals a magnetic triple point at x=similar to0.35 and similar to210 K. A model that takes into account the random binomial P and As distribution and the contribution from the iron and manganese magnetic sublattices yields excellent fits of the spectral components assigned to the ferromagnetic and incommensurate antiferromagnetic components for the x=0.25 and 0.35 compounds at all temperatures. [less ▲]

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See detailA Mossbauer spectral study of the YCo4-xFexB compounds
Long, Gary J; Hermann, Raphaël ULg; Grandjean, Fernande ULg et al

in Journal of Physics. Condensed Matter : An Institute of Physics Journal (2006), 18(48), 10765-10773

The Mossbauer spectra of the YCo4-xFexB compounds, where x is 1, 2 and 3, have been measured at 78 and 295 K and reveal relatively small iron hyperfine fields of about 15 T, relatively large quadrupole ... [more ▼]

The Mossbauer spectra of the YCo4-xFexB compounds, where x is 1, 2 and 3, have been measured at 78 and 295 K and reveal relatively small iron hyperfine fields of about 15 T, relatively large quadrupole interactions of about +1.0 and -1.0 mm s(-1) and very different spectra for YCo3FeB and YCo2Fe2B as compared with YCoFe3B. As a consequence, the spectra have been fitted with a full Hamiltonian by adjusting the hyperfine parameters of the iron 2c and 6i sites found in these compounds. The fits have used an asymmetry parameter, eta and Euler angles, theta and phi, that relate the hyperfine field to the iron electric field gradient axes of each iron site in an orientation that is consistent with the structural and magnetic properties of the site. The fits indicate that the relative areas of the spectral components assigned to the two iron 2c and 6i sites are in agreement with the iron occupancy of the sites as determined by neutron diffraction. The results of the fits also indicate both that the full Hamiltonian approach is required for physically reasonable spectral fits and that the small observed fields result from the presence of large orbital contributions which subtract from the Fermi contact contributions to the magnetic hyperfine fields of the two sites. [less ▲]

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See detailThe most biostratigraphic important miospore species from the Late Devonian, Euramerica (part I)
Steemans, Philippe ULg; Petus, Elodie ULg

Report (2010)

Palynological research project in collaboration with CENPES/BPA palynologists (Petrobras). Second project (2010-2012) Presented next are details of the consulting research project on "Upper Devonian – ... [more ▼]

Palynological research project in collaboration with CENPES/BPA palynologists (Petrobras). Second project (2010-2012) Presented next are details of the consulting research project on "Upper Devonian – Lower Pennsylvanian miospore collection and database" devised exclusively for CENPES/BPA palynologists. Project description The mounting of a palynological reference collection and database of biostratigraphically important miospores from the Upper Devonian through the Lower Pennsylvanian (Namurian). This includes a minimum of 150 selected species from Western Europe, and a minimum of 150 selected species from Gondwana. It should be noted that several stratigraphically relevant species are common to both regions, but the collection will emphasize regional differences in their size and morphography. Two main parts will compose the final product: the reference slide collection proper, and the database. a) Sufficiently well preserved specimens (identifiable at species level) will be located on conventional palynological slides by means of an England Finder graticule. The slides will be numbered and stored in special boxes. The slides will be mounted at Université de Liège, Belgium, with the whole assemblage of palynomorphs recovered from the organic residues after the processing of selected samples at the University. Provenance data for each reference slide will be provided whenever possible, including: country, basin, rock unit (fm.), biostratigraphic unit, and age. An appropriate number of specimens (so as to cover an array of size and morphological variability) will be referenced for each species - although not necessarily on the same slide. Every selected specimen will be photographed. All these data will be stored in the database. b) The database will be organized by using the software FileMaker Pro (we do not provide the software - for more information see http://www.filemaker.co.uk/). The database will be saved on CDRom or DVD media. The database will consist of: - The original description of each species and a high-resolution scanned (PDF) copy of publications illustrating the type specimens. A synthetic additional description of the specimens will be added, and the main differences from morphologically similar species will be stressed. - Synonymy lists. - Stratigraphic ranges (age and zonal span). - Geographic distribution. - A complete list of bibliographic references from which the above data are compiled. - Reference slide data (slide numbers and England Finder coordinates). - High-resolution pictures of all selected specimens in the slide collection, including detail pictures when deemed necessary for the species characterization. - A keyword research tool (e.g,: search for morphology, stratigraphy, taxa names, slides). [less ▲]

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See detailThe most biostratigraphic important miospore species from the Ordovician up to the Silurian (part I)
Steemans, Philippe ULg; Petus, Elodie ULg

Report (2009)

Palynological research project in collaboration with CENPES/BPA palynologists (Petrobras). First project (2009) Presented next are details of the consulting research project “Ordovician – Middle Devonian ... [more ▼]

Palynological research project in collaboration with CENPES/BPA palynologists (Petrobras). First project (2009) Presented next are details of the consulting research project “Ordovician – Middle Devonian miospore collection and database”, devised for exclusive use by CENPES/BPA palynologists. The project consists in mounting a palynological reference collection of biostratigraphically most important spores and cryptospores from the Ordovician through the Middle Devonian. It implies a minimum of 150 selected species. Most of them will be from the Gondwana Supercontinent. However, some stratigraphically relevant species known from Euramerica will be also included, as they could prove potentially useful for future work and comparison with Gondwanan taxa. Two main parts will compose the final product of the project: the reference slide collection proper, and the database. a) Sufficiently well preserved specimens (identifiable at species level) will be located on conventional palynological slides by means of an England Finder graticule. The slides will be numbered and stored in special boxes. The slides will be mounted at Université de Liège, Belgium, with the whole assemblage of palynomorphs recovered from the organic residues after the processing of selected samples at the University. Provenance data for each reference slide will be provided whenever possible, including: country, basin, rock unit (fm.), biostratigraphic unit, and age. An appropriate number of specimens (so as to cover an array of size and morphological variability) will be referenced for each species – although not necessarily on the same slide. Every selected specimen will be photographed. All these data will be stored in the database. b) The database will be organized by using the software FileMaker Pro (we do not provide the software - for more information see http://www.filemaker.co.uk/). The database will be saved on CDRom or DVD media. The database will consist of: - The original description of each species and a high-resolution scanned (PDF) copy of publications illustrating the type specimens. A synthetic additional description of the specimens will be added, and the main differences from morphologically similar species will be stressed. - Synonymy lists. - Stratigraphic ranges (age and zonal span). - Geographic distribution. - A complete list of bibliographic references from which the above data are compiled. - Reference slide data (slide numbers and England Finder coordinates). - High-resolution pictures of all selected specimens in the slide collection, including detail pictures when deemed necessary for the species characterization. - A keyword research tool (e.g.: search for morphology, stratigraphy, taxa names, slides). [less ▲]

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See detailMost Effective Interventions to Improve Patient Compliance with Osteoporosis Medications
Hiligsmann, Mickaël ULg; Salas, M.; Hughes, D. A. et al

in Osteoporosis International (2011, March), 22(Suppl 1), 335

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See detailThe most likely time and place of introduction of BTV8 into belgian ruminants
Saegerman, Claude ULg; Mellor, Philip; Uyttenhoef, Aude ULg et al

in PLoS ONE (2010), 5(2),

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See detailThe most massive star of the largest H II region in the Small Magellanic Cloud
Heydari-Malayeri, M.; Hutsemekers, Damien ULg

in Astronomy and Astrophysics (1991), 243

It is shown that the brightest star in the most important H II region of the Small Magellanic Cloud (SMC) is a multiple system. The zero-age main sequence mass of this star drops significantly from the ... [more ▼]

It is shown that the brightest star in the most important H II region of the Small Magellanic Cloud (SMC) is a multiple system. The zero-age main sequence mass of this star drops significantly from the previously estimated value of 130 or 110 solar masses to less than 85 solar masses, while its present mass falls from 113 to 58 solar masses, both due to multiplicity and extinction correction. This is another piece of evidence against the existence of stars more massive than about 100 solar masses in the SMC. It is also shown that the present mass of one of the two known O3 stars in the SMC is significantly smaller than presently believed. [less ▲]

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See detailThe most non-classical symmetric states of an N-qubit system
Baguette, Dorian ULg; Martin, John ULg

Poster (2013, May 23)

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See detailMOST reveals Spica as an Eclipsing Binary
Desmet, M.; Aerts, C.; Matthews, J. M. et al

in AIP Conference Proceedings (2009, September 01)

We present a unique observational study of Spica, a binary system with a primary component of the β Cephei type. We exploit simultaneous high-resolution spectroscopic observations and high-precision ... [more ▼]

We present a unique observational study of Spica, a binary system with a primary component of the β Cephei type. We exploit simultaneous high-resolution spectroscopic observations and high-precision photometry obtained by the MOST satellite. An important result is that the MOST photometry reveals Spica as an eclipsing binary contrary to what was quoted in the literature. [less ▲]

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See detailMot à mot, brin par brin : les suites [Nom préposition Nom] comme motifs
Magri, Véronique; Purnelle, Gérald ULg

in Dister, Anne; Longrée, Dominique; Purnelle, Gérald (Eds.) JADT 2012 – Actes des 11es Journées internationales d'Analyse statistique des Données Textuelles (2012)

The purpose of this paper is to evaluate the relevance of the notion of “pattern” (“motif”), defined as “a recurring association of n items in a text with a given linear structure”. It will be conducted ... [more ▼]

The purpose of this paper is to evaluate the relevance of the notion of “pattern” (“motif”), defined as “a recurring association of n items in a text with a given linear structure”. It will be conducted by singling out and analysing the sequence (pattern) “noun preposition noun”, both nouns of this pattern having to be identical: mot à mot, jour après jour, erreur sur erreur. The relevant prepositions for the “motifs” are à, après, contre, par, pour, sur as well as the more complex structures de … à and de … en. The analysis will be carried out on a corpus composed by the addition of extracts from the Frantext textual database, for the following generic subsets: novel, memoirs, poetry and theater. Does the sequence N + prép + N fit the definitional parameters of the “motif”, namely frequency, recurrence, memorization? The study will have to factor in original and variable expressions and the lexicalized units which are their models. It will also intend to show how these sequences take part in discursive organization, especially in generic differenciation, and what their linked semantic traits are. [less ▲]

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See detailUn mot d'ordre : bouger !
Henrotin, Yves ULg

Article for general public (2004)

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See detailLe mot du président
Franssen, Jean-Marc ULg

in Courard, Luc; Dehousse, Nicolas; Demonceau, Jean-François (Eds.) et al 300e conférence du C.E.R.E.S (2011)

On discute du rôle du CERES: essentiellement une fenêtre ouverte sur le monde pour nos chercheurs et nos étudiants, un moyen pour le département ArGEnCo de maintenir le contact avec le monde de l ... [more ▼]

On discute du rôle du CERES: essentiellement une fenêtre ouverte sur le monde pour nos chercheurs et nos étudiants, un moyen pour le département ArGEnCo de maintenir le contact avec le monde de l'entreprise. [less ▲]

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See detailLe mot et l'image chez trois artistes belges : Michaux, Hergé et Magritte
Defays, Jean-Marc ULg

in Korkeakoulujen Kielikeskuksen Julkaisuja (1988), (35), 51-64

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See detailLe mot et les rites. Un aperçu des significations de ὄργια et de quelques dérivés
Pirenne-Delforge, Vinciane ULg; Motte, André ULg

in Kernos : Revue Internationale et Pluridisciplinaire de Religion Grecque (1992), 5

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See detail“Mot par mot”. Poétique et Poésie du Hasard chez Mallarmé
Durand, Pascal ULg

in Courrier du Centre International d'Etudes Poétiques (1990), 188

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