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See detailFifty years of landscape evolution in Southwestern Mauritania by means of aerial photos
Niang, A. J.; Ozer, André ULg; Ozer, Pierre ULg

in Journal of Arid Environments (2008), 72(2), 97-107

South-western Mauritania is located in a semi-arid environment exposed to large rainfall variations and affected by a severe drought since the mid-1960s. The studied area includes the right bank of the ... [more ▼]

South-western Mauritania is located in a semi-arid environment exposed to large rainfall variations and affected by a severe drought since the mid-1960s. The studied area includes the right bank of the Senegal River and the southern extension of the Saharan sandy dunes and is based on the analysis of climatic data, field studies, and four aerial surveys realized since 1954. The climatic analysis shows that, after a strong decline of yearly rainfall started in the mid-1960s, a significant increase is observed from the early 1990s. In the meantime, dust storms frequency has dramatically increased while the threshold wind speed declined as a result of vegetation contraction. The comparison of the four mosaics of aerial photos reveals the major impact of both drought and human on recent environment changes with the strong decline of the forest, the reactivation of sandy soils and the apparition of large rice fields. If the increase of active dunes activity is likely to be a consequence of the persisting drought, forest decline is more likely to be attributed to fuel wood collection in a first time, then to the creation of rice fields since the late 1980s. Although the 2003 aerial photos show a timid return of vegetation in very limited and specific areas, field surveys show that wind erosion is still very important and water erosion is developing very rapidly because of the absence of vegetation cover. (C) 2007 Elsevier Ltd. All rights reserved. [less ▲]

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See detailFifty Years of Quasars. From Observations to Physical Parameters
D'Onofrio, Mauro; Marziani, Paola; Sulentic, Jack W. et al

in D'Onofrio, M. (Ed.) Fifty Years of Quasars: From Early Observations and Ideas to Future Research (2012)

Observational measures of AGNs allow us to directly infer some basic physical properties of quasars including (1) physical conditions and chemical abundances in the broad-line emitting gas as well as (2 ... [more ▼]

Observational measures of AGNs allow us to directly infer some basic physical properties of quasars including (1) physical conditions and chemical abundances in the broad-line emitting gas as well as (2) radius of the line-emitting region, (3) black hole mass, (4) and Eddington ratio. In this chapter, we seek information on how these quantities are measured. One of the surprises of recent times, that would have shocked the discoverers in the 1960s are the large BH masses and high chemical abundances inferred for even some of the highest redshift quasars known. [less ▲]

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See detailFifty Years of Quasars. Quasars Classes and Their Relationships
D'Onofrio, Mauro; Marziani, Paola; Sulentic, Jack W. et al

in D'Onofrio, M. (Ed.) Fifty Years of Quasars: From Early Observations and Ideas to Future Research (2012)

Most of the questions in this chapter deal with sources that do not show the "classical" broad emission-line spectrum that characterizes the majority of known AGNs at high and low redshift. If that ... [more ▼]

Most of the questions in this chapter deal with sources that do not show the "classical" broad emission-line spectrum that characterizes the majority of known AGNs at high and low redshift. If that majority represents a "parent population" of AGNs, is the apparent absence of broad lines a result of obscuration, orientation, or different physical conditions? Can all of the subclasses be unified under the AGN umbrella? With the unification scheme set in place and assumed to be fundamentally correct, there are at least four overarching questions: do all type-2 AGNs possess an obscured broad-line region? Or how can we distinguishing type-2 AGNs without a broad-line region if they exist? Where is the low end of quasar activity? The least luminous AGNs are the so-called low-ionization nuclear emission-line regions (LINERs), but it is legitimate to ask if they are all true AGNs. [less ▲]

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See detailFigement, langage et didactique du français langue première
Steffens, Marie ULg

in Langues et Linguistique (in press), (36),

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See detailFighting economic crime in the EU: DG Justice and DG Competition on different tracks?
Franssen, Vanessa ULg

Conference (2014, September 26)

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See detailFighting Poor Quality Medicines: Develop-ment, Transfer and Validation of Generic HPLC Methods for Analyzing two WHO Recommended Antimalarial Tablets
Mbinze Kindenge, Jérémie; Yemoa, Achille; Lebrun, Pierre ULg et al

in American Journal of Analytical Chemistry (2015), 6

As serious but neglected public health problems, poor quality medicines, i.e. for antimalarial medicines, urged to be fought. One of the approaches is to consider the analytical chemistry and separative ... [more ▼]

As serious but neglected public health problems, poor quality medicines, i.e. for antimalarial medicines, urged to be fought. One of the approaches is to consider the analytical chemistry and separative techniques. In this study, a generic liquid chromatographic method was firstly devel-oped for the purpose of screening 8 antimalarial active ingredients, namely amodiaquine (AQ), piperaquine (PPQ), sulfalene (SL), pyrimethamine (PM), lumefantrine (LF), artesunate (AS), artemether (AM) and dihydroartemisinine (DHA) by applying DoE/DS optimization strategy. Since the method was not totally satisfying in terms of peak separation, further experiments were undergone applying the same development strategy while splitting the 8 ingredients into five groups. Excellent prediction was observed prior to correlation between retention times of predicted and observed separation conditions. Then, a successful geometric transfer was realized to reduce the analysis time focusing on the simultaneous quantification of two WHO's recommended ACTs in anti-malarial fixed-dose combination (AM-LF and AS-AQ) in tablets. The optimal separation was achieved using an isocratic elution of methanol-ammonium formate buffer (pH 2.8; 10mM) (82.5: 17.5, v/v) at 0.6ml/min through a C18 column (100mm×3.5mm, 3.5 μm) thermostated at 25°C. After a successful validation stage based on the total error approach, the method was applied to determine the content of AM/LF or AS/AQ in seven brands of antimalarial tablets currently marketed in West, Central and East Africa. Satisfying results were obtained compared to the claimed contents. [less ▲]

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See detailFighting Sleep at Night: Brain Correlates and Vulnerability to Sleep Loss.
Maire, Micheline; Reichert, Carolin Franziska; Gabel, Virginie et al

in Annals of neurology (2015), 78(2), 235-47

OBJECTIVE: Even though wakefulness at night leads to profound performance deterioration and is regularly experienced by shift workers, its cerebral correlates remain virtually unexplored. METHODS: We ... [more ▼]

OBJECTIVE: Even though wakefulness at night leads to profound performance deterioration and is regularly experienced by shift workers, its cerebral correlates remain virtually unexplored. METHODS: We assessed brain activity in young healthy adults during a vigilant attention task under high and low sleep pressure during night-time, coinciding with strongest circadian sleep drive. We examined sleep-loss-related attentional vulnerability by considering a PERIOD3 polymorphism presumably impacting on sleep homeostasis. RESULTS: Our results link higher sleep-loss-related attentional vulnerability to cortical and subcortical deactivation patterns during slow reaction times (i.e., suboptimal vigilant attention). Concomitantly, thalamic regions were progressively less recruited with time-on-task and functionally less connected to task-related and arousal-promoting brain regions in those volunteers showing higher attentional instability in their behavior. The data further suggest that the latter is linked to shifts into a task-inactive default-mode network in between task-relevant stimulus occurrence. INTERPRETATION: We provide a multifaceted view on cerebral correlates of sleep loss at night and propose that genetic predisposition entails differential cerebral coping mechanisms, potentially compromising adequate performance during night work. [less ▲]

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See detailFigli di Genitori Gay e Lesbiche: ricerca e counseling clinico
D'Amore, Salvatore ULg

Scientific conference (2014, March 21)

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See detailFigli di un testo minore
Curreri, Luciano ULg

in Curreri, Luciano; Traina, Giuseppe (Eds.) Studi in onore di Giuseppe Papponetti (2013)

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See detail"Il figlio di Bakunìn". Anarchico innamorato della vita e delle donne.
Curreri, Luciano ULg

Article for general public (2015)

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See detailFiguras de traductor (no) profesional
Willson, Patricia ULg

Scientific conference (2015, October 15)

Detailed reference viewed: 34 (5 ULg)
See detailLa figuration de l’écrivain dans les Physiologies
Stienon, Valérie ULg

Scientific conference (2011, May 11)

Detailed reference viewed: 9 (0 ULg)
See detailFigurations de la mort dans le cinéma d’animation
Tomasovic, Dick ULg

Scientific conference (2003, February 12)

Detailed reference viewed: 32 (6 ULg)
See detailFigurations de la vie littéraire
Dozo, Björn-Olav ULg; Glinoer, Anthony

Book published by Samsa (2015)

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See detailFigurations et médiogrammes. Les micro-fictions du Petit Bottin des Lettres et des Arts
Saint-Amand, Denis ULg

in Glinoer, Anthony; Lacroix, Michel (Eds.) Romans à clef. Les ambivalences du réel (2014)

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See detailLa figure de Charlemagne dans la vulgarisation historique belge. Exemples choisis
Lanneau, Catherine ULg

in Revue Belge de Philologie et d'Histoire (2015), 93(2015/3-4), 771-789

Common ancestor of the Belgians, civilizing Christian emperor, father of Europe: these are some of the political (polemical) ways used to describe Charlemagne in the Belgium. This contribution seeks to ... [more ▼]

Common ancestor of the Belgians, civilizing Christian emperor, father of Europe: these are some of the political (polemical) ways used to describe Charlemagne in the Belgium. This contribution seeks to decipher and interpret these descriptions. What do we remember, or want to remember, from the origins and actions of the Carolingian emperor to show to the Belgians? Without pretending to be complete, certain marked tendencies and manifest evolutions are pointed out, found in the popular historical books for adults and children. Two key periods are defined: the first decades of the Belgian independence and the period after 1945. The final results are mixed: Charlemagne was certainly an icon, but in each of his avatars, failed to convince or win the majority support. His best enduring memory seems to be found today in the Euregion Meuse-Rhine, mostly because of the commercial and touristic value. [less ▲]

Detailed reference viewed: 27 (2 ULg)