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See detailMaya blue-green pigments found in Calakmul, Mexico: a study by Raman and UV-visible spectroscopy
Moreno, Renata Garcia; Strivay, David ULg; Gilbert, Bernard ULg

in Journal Of Raman Spectroscopy (2008), 39(8), 1050-1056

After more than two decades of fieldwork in the Maya archaeological site of Calakmul, Mexico, numerous remnants of blue and green pigments have been reported on wall paintings, as well as on funerary ... [more ▼]

After more than two decades of fieldwork in the Maya archaeological site of Calakmul, Mexico, numerous remnants of blue and green pigments have been reported on wall paintings, as well as on funerary paraphernalia, such as masks, miniatures and vases. The importance of these pigments is linked to the sacred values that Maya people associate with blue and green colours since pre-Columbian times. These hues symbolise water, and are therefore associated with fertility and regeneration. This paper aims to perform a survey of the blue and green pigments used in the Early Classic and Late Classic periods in Calakmul (300-850 A.D.), in order to have a better understanding of their chemical composition and origin. Analyses were performed on microsamples using Raman and UV-visible spectroscopies to evaluate the possibilities that these techniques can offer in future in situ researches on Mesoamerican archaeological materials and objects. With these analyses, we have documented a large blue-green chromatic palette, which includes the earliest Blue Maya and Green Maya known to date, as well as malachite, pseudomalachite and an unknown-up-to-now blue-green mineral pigment, veszelyite, used specifically for ritual objects. The results indicate a careful selection of imported products and the mastering of a complex ancient Maya pictorial tradition. Copyright (c) 2008 John Wiley & Sons, Ltd. [less ▲]

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See detailAssessment of existing formulas for equivalent damping to use in direct displacement-based design
Degée, Hervé ULg; Bento, R.; Massena, B.

in Proceedings of the 14th World Conference on Erthquake Engineering (2008)

It is generally stated that an accurate evaluation of the equivalent viscous damping is a crucial step in the DirectDisplacement-Based Design (DDBD) methodology. A wrong assessment of equivalent viscous ... [more ▼]

It is generally stated that an accurate evaluation of the equivalent viscous damping is a crucial step in the DirectDisplacement-Based Design (DDBD) methodology. A wrong assessment of equivalent viscous dampingcan indeed lead to important errors on the actual ductility demand of the structural elements. The objective of thepresent contribution is to assess and compare different existing formulas for the evaluation of the equivalent damping and to provide information on the impact of choosing one or another formulation on the seismicdesign. It is more precisely focused on the very recent proposals of Dwairi – Kowalsky and Blandon –Priestley. [less ▲]

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See detailIsotopic ratios and elemental contents as indicators of seagrass C processing and sewage influence in a tropical macrotidal ecosystem (Madagascar, Mozambic channel)
Lepoint, Gilles ULg; Frederich, Bruno ULg; Gobert, Sylvie ULg et al

in Scientia Marina (2008), 72(1), 109-117

Isotopic ratios and elemental concentrations of carbon and nitrogen were measured in seven seagrass species colonising different tidal flats near Toliara (SW Madagascar) in order to determine the ... [more ▼]

Isotopic ratios and elemental concentrations of carbon and nitrogen were measured in seven seagrass species colonising different tidal flats near Toliara (SW Madagascar) in order to determine the potential use of these parameters for assessing C processing and sewage use by tropical seagrasses. Nitrogen concentrations measured in upper intertidal seagrasses near Toliara were almost twice those measured on the tidal flat near a healthy mangrove situated 20 km away from Toliara town. At Toliara Beach, δ15N values were correlated with the N concentrations of Halodule sp., one of the dominant species on the tidal flat. This correlation did not exist for Halophila ovalis, the other dominant species. An increase in N concentrations and δ15N values demonstrates the influence of sewage coming directly onto Toliara Beach on the N cycles of intertidal seagrasses. Nevertheless, this influence seems restricted to the upper littoral zone and was not the main cause of seagrass die-off. On the other hand, at the mangrove site, δ15N values were not correlated with the N concentrations of Halodule sp. or Thalassia hemprichii, showing that natural δ15N variability is driven by other factors than the δ15N of N sources. Moreover, inter-individual variability of δ15N values was greater than inter-specific or inter-site variability, making the δ15N difficult to interpret in the context of human-disturbance influence on the N cycle of tropical seagrasses. δ13C values were close to -9‰, indicating the use of HCO 3– as an inorganic carbon source by the seven investigated species. Contrary to our hypothesis, variation between sites and location on the tidal flat was limited, suggesting limited impact on δ13C values of sewage, emersion duration and mechanisms for HCO 3– incorporation. [less ▲]

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See detailDetection of glucocorticoid bioactivity in bovine urine samples using a reporter gene assay
Connolly, Lisa; Kai, C.; Van Der Heiden, Edwige ULg et al

in Proceedings of the Euroresidue VI Conference (2008)

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See detailAgonistic sounds in the skunk clownfish (Amphiprion akallopisos) : spectral and temporal basis for fish size assessment and individual recognition
Colleye, Orphal ULg; Frederich, Bruno ULg; Vandewalle, Pierre ULg et al

Poster (2008)

Clownfishes (i.e. Amphiprion akallopisos) are territorial fishes that use sound production to defend their anemone territory. They live in social groups within which there is a size-based dominance ... [more ▼]

Clownfishes (i.e. Amphiprion akallopisos) are territorial fishes that use sound production to defend their anemone territory. They live in social groups within which there is a size-based dominance hierarchy. In such a system, agonistic interactions are usual and play an important role in social organization by maintaining size differences between individuals adjacent in rank. Sounds are known to be used in agonistic interactions; they could therefore be associated with aggressive display within the group hierarchy. In the present study, we compared the sonic characteristics between individuals of different sizes and of different sexual status (non-breeder, male and female). Sound analysis revealed that dominant frequency and pulse length are highly correlated with fish size, and are not related to sex. No information related to size can be extracted from the pulse period, interpulse duration and number of pulses per train. Evidence is provided that dominant frequency and pulse length are morphologically determined signals related to fish size. In that case, smaller individuals produce shorter duration and higher frequency sounds than larger individuals. Both sonic features are signals conveying information related to the size of the emitter. This finding could be of significant importance, and might help to understand one of the mechanisms that carry the clue for individual recognition within the group hierarchy. [less ▲]

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See detailNew Trends in Computing Anticipatory Systems : Emergence of Artificial Conscious Intelligence with Machine Learning Natural Language
Dubois, Daniel ULg

in Dubois, Daniel (Ed.) COMPUTING ANTICIPATORY SYSTEMS (2008)

This paper deals with the challenge to create an Artificial Intelligence System with an Artificial Consciousness. For that, an introduction to computing anticipatory systems is presented, with the ... [more ▼]

This paper deals with the challenge to create an Artificial Intelligence System with an Artificial Consciousness. For that, an introduction to computing anticipatory systems is presented, with the definitions of strong and weak anticipation. The quasi-anticipatory systems of Robert Rosen are linked to open-loop controllers. Then, some properties of the natural brain are presented in relation to the triune brain theory of Paul D. MacLean, and the mind time of Benjamin Libet, with his veto of the free will. The theory of the hyperincursive discrete anticipatory systems is recalled in view to introduce the concept of hyperincursive free will, which gives a similar veto mechanism: free will as unpredictable hyperincursive anticipation The concepts of endo-anticipation and exo-anticipation are then defined. Finally, some ideas about artificial conscious intelligence with natural language are presented, in relation to the Turing Machine, Formal Language, Intelligent Agents and Mutli-Agent System. [less ▲]

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See detailIn Unordnung erstarrt
Schlagheck, Peter ULg; Richter, K.

Article for general public (2008)

Experimente mit kalten Atomen zeigen erstmals direkt die Anderson-Lokalisierung von Materiewellen.

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See detailIm Zeichen des Ödipuskomplexes. Mutterbindung und Vaterhass in Günter Grass’ Autobiographie „Beim Häuten der Zwiebel“ und seinem Roman „Die Blechtrommel“.
Pontzen, Alexandra ULg

in Hagestedt, Lutz (Ed.) Literatur als Lust. Begegnungen zwischen Poesie und Wissenschaft: Festschrift für Thomas Anz zum 60. Geburtstag (2008)

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See detailUnknown placental glycoprotein K-76 kDa [Fragment] from Bison bonasus placenta - Access number P85330
Kiewisz, J.; Melo de Sousa, Noelita ULg; Beckers, Jean-François ULg et al

E-print/Working paper (2008)

N-terminal microsequence obtained after purification and characterization of placental proteins in Bison bonasus. Proteins were submitted to SwissProt databank.

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See detailTunisian Table Olive Phenolic Compounds And Their Antioxidant Capacity
Ben Othman, N.; Weber, Dominique ULg; Thonart, Philippe ULg et al

in Journal of Food Science (2008), 73(4),

For the 1st time, 4 olive cultivars, theMeski, Chemlali, Besbessi, and Tounsi, fromthe Tunisian market were investigated to evaluate the phenolic compounds’ contribution in nutritional value of table ... [more ▼]

For the 1st time, 4 olive cultivars, theMeski, Chemlali, Besbessi, and Tounsi, fromthe Tunisian market were investigated to evaluate the phenolic compounds’ contribution in nutritional value of table olives. From the Meski cultivar, we have chosen 4 different samples to evaluate differences within the same cultivar. Basic characteristics and total phenolic content were evaluated in flesh and kernel. The highest value of flesh phenolic content was observed in sample M4 of the Meski cultivar; however, the lowest value was observed in the Besbessi cultivar and they were 1801 and 339 mg GA/100 g dry weight, respectively. Themain simple phenolic compounds identified in flesh extracts are hydroxytyrosol, tyrosol, and vanillic acid. Oleuropein was not detected in any samples. The antioxidant activity of Tunisian olive flesh varies between 212 and 462 μM TEAC/g of dry weight. Antioxidant activity of olives was related to their phenolic content but we found a low correlation between phenolic content and TEAC [less ▲]

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See detailPeinlichkeit und Imagination
Pontzen, Alexandra ULg

in Ziemer, Gesa; Zumsteg, Simon; Huber, Jörg (Eds.) Archipele des Imaginären (2008)

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See detailLigands playing musical chairs with G-quadruplex DNA: A rapid and simple displacement assay for identifying selective G-quadruplex binders
Monchaud, David; Allain, C.; Bertrand, Hélène et al

in Biochimie (2008), 90(8), 1207-1223

We report here the details of G4-FID (G-quadruplex fluorescent intercalator displacement), a simple method aiming at evaluating quadruplex DNA binding affinity and quadruplex- over duplex-DNA selectivity ... [more ▼]

We report here the details of G4-FID (G-quadruplex fluorescent intercalator displacement), a simple method aiming at evaluating quadruplex DNA binding affinity and quadruplex- over duplex-DNA selectivity of putative ligands. This assay is based on the loss of fluorescence upon displacement of thiazole orange from quadruplex and duplex-DNA matrices. The original protocol was tested using various quadruplex and duplex-DNA targets, and with a wide panel of G-quadruplex ligands belonging to different families (i.e. from quinacridines to metalloorganic ligands) likely to display various binding modes. The reliability of the assay is further supported by comparisons with FRET-melting and ESI-MS assays. [less ▲]

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See detailPietätlose Rezeption? – Elfriede Jelineks Umgang mit der Tradition in „Die Kinder der Toten“.
Pontzen, Alexandra ULg

in Müller, Sabine; Theodorsen, Cathrin (Eds.) Elfriede Jelinek – Tradition, Politik und Zitat. (2008)

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See detailUne histoire à plusieurs voix entre le pays soninké (Mali) et la France
Razy, Elodie ULg

in Krauskopff, G. (Ed.) Les faiseurs d’histoires (2008)

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See detailCalculul Constructiilor Metalice la Actiunea Focului
Franssen, Jean-Marc ULg; Zaharia, Raul

Book published by Editura Orizonturi Universitare (2008)

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See detailCoherent backscattering of Bose-Einstein condensates in two-dimensional disorder potentials
Hartung, Michael; Wellens, Thomas; Mueller, Cord A et al

in Physical Review Letters (2008), 101(2), 020603

We study quantum transport of an interacting Bose-Einstein condensate in a two-dimensional disorder potential. In the limit of a vanishing atom-atom interaction, a sharp cone in the angle-resolved density ... [more ▼]

We study quantum transport of an interacting Bose-Einstein condensate in a two-dimensional disorder potential. In the limit of a vanishing atom-atom interaction, a sharp cone in the angle-resolved density of the scattered matter wave is observed, arising from constructive interference between amplitudes propagating along reversed scattering paths. Weak interaction transforms this coherent backscattering peak into a pronounced dip, indicating destructive instead of constructive interference. We reproduce this result, obtained from the numerical integration of the Gross-Pitaevskii equation, by a diagrammatic theory of weak localization in the presence of nonlinearity. [less ▲]

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See detailRespiratory and skin hypersensitivity reactions caused by a peptide coupling reagent.
Vandenplas, O.; Hereng, M.-P.; Heymans, J. et al

in Occupational and Environmental Medicine (2008), 65(10), 715-716

Detailed reference viewed: 29 (4 ULg)